| 1 | /* |
| 2 | * fs/nfs/nfs4proc.c |
| 3 | * |
| 4 | * Client-side procedure declarations for NFSv4. |
| 5 | * |
| 6 | * Copyright (c) 2002 The Regents of the University of Michigan. |
| 7 | * All rights reserved. |
| 8 | * |
| 9 | * Kendrick Smith <kmsmith@umich.edu> |
| 10 | * Andy Adamson <andros@umich.edu> |
| 11 | * |
| 12 | * Redistribution and use in source and binary forms, with or without |
| 13 | * modification, are permitted provided that the following conditions |
| 14 | * are met: |
| 15 | * |
| 16 | * 1. Redistributions of source code must retain the above copyright |
| 17 | * notice, this list of conditions and the following disclaimer. |
| 18 | * 2. Redistributions in binary form must reproduce the above copyright |
| 19 | * notice, this list of conditions and the following disclaimer in the |
| 20 | * documentation and/or other materials provided with the distribution. |
| 21 | * 3. Neither the name of the University nor the names of its |
| 22 | * contributors may be used to endorse or promote products derived |
| 23 | * from this software without specific prior written permission. |
| 24 | * |
| 25 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 26 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 27 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 28 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 29 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| 32 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 33 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 34 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 35 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 36 | */ |
| 37 | |
| 38 | #include <linux/mm.h> |
| 39 | #include <linux/delay.h> |
| 40 | #include <linux/errno.h> |
| 41 | #include <linux/string.h> |
| 42 | #include <linux/slab.h> |
| 43 | #include <linux/sunrpc/clnt.h> |
| 44 | #include <linux/nfs.h> |
| 45 | #include <linux/nfs4.h> |
| 46 | #include <linux/nfs_fs.h> |
| 47 | #include <linux/nfs_page.h> |
| 48 | #include <linux/namei.h> |
| 49 | #include <linux/mount.h> |
| 50 | #include <linux/module.h> |
| 51 | #include <linux/sunrpc/bc_xprt.h> |
| 52 | |
| 53 | #include "nfs4_fs.h" |
| 54 | #include "delegation.h" |
| 55 | #include "internal.h" |
| 56 | #include "iostat.h" |
| 57 | #include "callback.h" |
| 58 | #include "pnfs.h" |
| 59 | |
| 60 | #define NFSDBG_FACILITY NFSDBG_PROC |
| 61 | |
| 62 | #define NFS4_POLL_RETRY_MIN (HZ/10) |
| 63 | #define NFS4_POLL_RETRY_MAX (15*HZ) |
| 64 | |
| 65 | #define NFS4_MAX_LOOP_ON_RECOVER (10) |
| 66 | |
| 67 | struct nfs4_opendata; |
| 68 | static int _nfs4_proc_open(struct nfs4_opendata *data); |
| 69 | static int _nfs4_recover_proc_open(struct nfs4_opendata *data); |
| 70 | static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); |
| 71 | static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *); |
| 72 | static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr); |
| 73 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr); |
| 74 | static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
| 75 | struct nfs_fattr *fattr, struct iattr *sattr, |
| 76 | struct nfs4_state *state); |
| 77 | |
| 78 | /* Prevent leaks of NFSv4 errors into userland */ |
| 79 | static int nfs4_map_errors(int err) |
| 80 | { |
| 81 | if (err >= -1000) |
| 82 | return err; |
| 83 | switch (err) { |
| 84 | case -NFS4ERR_RESOURCE: |
| 85 | return -EREMOTEIO; |
| 86 | default: |
| 87 | dprintk("%s could not handle NFSv4 error %d\n", |
| 88 | __func__, -err); |
| 89 | break; |
| 90 | } |
| 91 | return -EIO; |
| 92 | } |
| 93 | |
| 94 | /* |
| 95 | * This is our standard bitmap for GETATTR requests. |
| 96 | */ |
| 97 | const u32 nfs4_fattr_bitmap[2] = { |
| 98 | FATTR4_WORD0_TYPE |
| 99 | | FATTR4_WORD0_CHANGE |
| 100 | | FATTR4_WORD0_SIZE |
| 101 | | FATTR4_WORD0_FSID |
| 102 | | FATTR4_WORD0_FILEID, |
| 103 | FATTR4_WORD1_MODE |
| 104 | | FATTR4_WORD1_NUMLINKS |
| 105 | | FATTR4_WORD1_OWNER |
| 106 | | FATTR4_WORD1_OWNER_GROUP |
| 107 | | FATTR4_WORD1_RAWDEV |
| 108 | | FATTR4_WORD1_SPACE_USED |
| 109 | | FATTR4_WORD1_TIME_ACCESS |
| 110 | | FATTR4_WORD1_TIME_METADATA |
| 111 | | FATTR4_WORD1_TIME_MODIFY |
| 112 | }; |
| 113 | |
| 114 | const u32 nfs4_statfs_bitmap[2] = { |
| 115 | FATTR4_WORD0_FILES_AVAIL |
| 116 | | FATTR4_WORD0_FILES_FREE |
| 117 | | FATTR4_WORD0_FILES_TOTAL, |
| 118 | FATTR4_WORD1_SPACE_AVAIL |
| 119 | | FATTR4_WORD1_SPACE_FREE |
| 120 | | FATTR4_WORD1_SPACE_TOTAL |
| 121 | }; |
| 122 | |
| 123 | const u32 nfs4_pathconf_bitmap[2] = { |
| 124 | FATTR4_WORD0_MAXLINK |
| 125 | | FATTR4_WORD0_MAXNAME, |
| 126 | 0 |
| 127 | }; |
| 128 | |
| 129 | const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE |
| 130 | | FATTR4_WORD0_MAXREAD |
| 131 | | FATTR4_WORD0_MAXWRITE |
| 132 | | FATTR4_WORD0_LEASE_TIME, |
| 133 | FATTR4_WORD1_TIME_DELTA |
| 134 | | FATTR4_WORD1_FS_LAYOUT_TYPES |
| 135 | }; |
| 136 | |
| 137 | const u32 nfs4_fs_locations_bitmap[2] = { |
| 138 | FATTR4_WORD0_TYPE |
| 139 | | FATTR4_WORD0_CHANGE |
| 140 | | FATTR4_WORD0_SIZE |
| 141 | | FATTR4_WORD0_FSID |
| 142 | | FATTR4_WORD0_FILEID |
| 143 | | FATTR4_WORD0_FS_LOCATIONS, |
| 144 | FATTR4_WORD1_MODE |
| 145 | | FATTR4_WORD1_NUMLINKS |
| 146 | | FATTR4_WORD1_OWNER |
| 147 | | FATTR4_WORD1_OWNER_GROUP |
| 148 | | FATTR4_WORD1_RAWDEV |
| 149 | | FATTR4_WORD1_SPACE_USED |
| 150 | | FATTR4_WORD1_TIME_ACCESS |
| 151 | | FATTR4_WORD1_TIME_METADATA |
| 152 | | FATTR4_WORD1_TIME_MODIFY |
| 153 | | FATTR4_WORD1_MOUNTED_ON_FILEID |
| 154 | }; |
| 155 | |
| 156 | static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, |
| 157 | struct nfs4_readdir_arg *readdir) |
| 158 | { |
| 159 | __be32 *start, *p; |
| 160 | |
| 161 | BUG_ON(readdir->count < 80); |
| 162 | if (cookie > 2) { |
| 163 | readdir->cookie = cookie; |
| 164 | memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); |
| 165 | return; |
| 166 | } |
| 167 | |
| 168 | readdir->cookie = 0; |
| 169 | memset(&readdir->verifier, 0, sizeof(readdir->verifier)); |
| 170 | if (cookie == 2) |
| 171 | return; |
| 172 | |
| 173 | /* |
| 174 | * NFSv4 servers do not return entries for '.' and '..' |
| 175 | * Therefore, we fake these entries here. We let '.' |
| 176 | * have cookie 0 and '..' have cookie 1. Note that |
| 177 | * when talking to the server, we always send cookie 0 |
| 178 | * instead of 1 or 2. |
| 179 | */ |
| 180 | start = p = kmap_atomic(*readdir->pages, KM_USER0); |
| 181 | |
| 182 | if (cookie == 0) { |
| 183 | *p++ = xdr_one; /* next */ |
| 184 | *p++ = xdr_zero; /* cookie, first word */ |
| 185 | *p++ = xdr_one; /* cookie, second word */ |
| 186 | *p++ = xdr_one; /* entry len */ |
| 187 | memcpy(p, ".\0\0\0", 4); /* entry */ |
| 188 | p++; |
| 189 | *p++ = xdr_one; /* bitmap length */ |
| 190 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ |
| 191 | *p++ = htonl(8); /* attribute buffer length */ |
| 192 | p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode)); |
| 193 | } |
| 194 | |
| 195 | *p++ = xdr_one; /* next */ |
| 196 | *p++ = xdr_zero; /* cookie, first word */ |
| 197 | *p++ = xdr_two; /* cookie, second word */ |
| 198 | *p++ = xdr_two; /* entry len */ |
| 199 | memcpy(p, "..\0\0", 4); /* entry */ |
| 200 | p++; |
| 201 | *p++ = xdr_one; /* bitmap length */ |
| 202 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ |
| 203 | *p++ = htonl(8); /* attribute buffer length */ |
| 204 | p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode)); |
| 205 | |
| 206 | readdir->pgbase = (char *)p - (char *)start; |
| 207 | readdir->count -= readdir->pgbase; |
| 208 | kunmap_atomic(start, KM_USER0); |
| 209 | } |
| 210 | |
| 211 | static int nfs4_wait_clnt_recover(struct nfs_client *clp) |
| 212 | { |
| 213 | int res; |
| 214 | |
| 215 | might_sleep(); |
| 216 | |
| 217 | res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, |
| 218 | nfs_wait_bit_killable, TASK_KILLABLE); |
| 219 | return res; |
| 220 | } |
| 221 | |
| 222 | static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) |
| 223 | { |
| 224 | int res = 0; |
| 225 | |
| 226 | might_sleep(); |
| 227 | |
| 228 | if (*timeout <= 0) |
| 229 | *timeout = NFS4_POLL_RETRY_MIN; |
| 230 | if (*timeout > NFS4_POLL_RETRY_MAX) |
| 231 | *timeout = NFS4_POLL_RETRY_MAX; |
| 232 | schedule_timeout_killable(*timeout); |
| 233 | if (fatal_signal_pending(current)) |
| 234 | res = -ERESTARTSYS; |
| 235 | *timeout <<= 1; |
| 236 | return res; |
| 237 | } |
| 238 | |
| 239 | /* This is the error handling routine for processes that are allowed |
| 240 | * to sleep. |
| 241 | */ |
| 242 | static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception) |
| 243 | { |
| 244 | struct nfs_client *clp = server->nfs_client; |
| 245 | struct nfs4_state *state = exception->state; |
| 246 | int ret = errorcode; |
| 247 | |
| 248 | exception->retry = 0; |
| 249 | switch(errorcode) { |
| 250 | case 0: |
| 251 | return 0; |
| 252 | case -NFS4ERR_ADMIN_REVOKED: |
| 253 | case -NFS4ERR_BAD_STATEID: |
| 254 | case -NFS4ERR_OPENMODE: |
| 255 | if (state == NULL) |
| 256 | break; |
| 257 | nfs4_state_mark_reclaim_nograce(clp, state); |
| 258 | goto do_state_recovery; |
| 259 | case -NFS4ERR_STALE_STATEID: |
| 260 | case -NFS4ERR_STALE_CLIENTID: |
| 261 | case -NFS4ERR_EXPIRED: |
| 262 | goto do_state_recovery; |
| 263 | #if defined(CONFIG_NFS_V4_1) |
| 264 | case -NFS4ERR_BADSESSION: |
| 265 | case -NFS4ERR_BADSLOT: |
| 266 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 267 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
| 268 | case -NFS4ERR_DEADSESSION: |
| 269 | case -NFS4ERR_SEQ_FALSE_RETRY: |
| 270 | case -NFS4ERR_SEQ_MISORDERED: |
| 271 | dprintk("%s ERROR: %d Reset session\n", __func__, |
| 272 | errorcode); |
| 273 | nfs4_schedule_state_recovery(clp); |
| 274 | exception->retry = 1; |
| 275 | break; |
| 276 | #endif /* defined(CONFIG_NFS_V4_1) */ |
| 277 | case -NFS4ERR_FILE_OPEN: |
| 278 | if (exception->timeout > HZ) { |
| 279 | /* We have retried a decent amount, time to |
| 280 | * fail |
| 281 | */ |
| 282 | ret = -EBUSY; |
| 283 | break; |
| 284 | } |
| 285 | case -NFS4ERR_GRACE: |
| 286 | case -NFS4ERR_DELAY: |
| 287 | case -EKEYEXPIRED: |
| 288 | ret = nfs4_delay(server->client, &exception->timeout); |
| 289 | if (ret != 0) |
| 290 | break; |
| 291 | case -NFS4ERR_OLD_STATEID: |
| 292 | exception->retry = 1; |
| 293 | } |
| 294 | /* We failed to handle the error */ |
| 295 | return nfs4_map_errors(ret); |
| 296 | do_state_recovery: |
| 297 | nfs4_schedule_state_recovery(clp); |
| 298 | ret = nfs4_wait_clnt_recover(clp); |
| 299 | if (ret == 0) |
| 300 | exception->retry = 1; |
| 301 | return ret; |
| 302 | } |
| 303 | |
| 304 | |
| 305 | static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp) |
| 306 | { |
| 307 | spin_lock(&clp->cl_lock); |
| 308 | if (time_before(clp->cl_last_renewal,timestamp)) |
| 309 | clp->cl_last_renewal = timestamp; |
| 310 | spin_unlock(&clp->cl_lock); |
| 311 | } |
| 312 | |
| 313 | static void renew_lease(const struct nfs_server *server, unsigned long timestamp) |
| 314 | { |
| 315 | do_renew_lease(server->nfs_client, timestamp); |
| 316 | } |
| 317 | |
| 318 | #if defined(CONFIG_NFS_V4_1) |
| 319 | |
| 320 | /* |
| 321 | * nfs4_free_slot - free a slot and efficiently update slot table. |
| 322 | * |
| 323 | * freeing a slot is trivially done by clearing its respective bit |
| 324 | * in the bitmap. |
| 325 | * If the freed slotid equals highest_used_slotid we want to update it |
| 326 | * so that the server would be able to size down the slot table if needed, |
| 327 | * otherwise we know that the highest_used_slotid is still in use. |
| 328 | * When updating highest_used_slotid there may be "holes" in the bitmap |
| 329 | * so we need to scan down from highest_used_slotid to 0 looking for the now |
| 330 | * highest slotid in use. |
| 331 | * If none found, highest_used_slotid is set to -1. |
| 332 | * |
| 333 | * Must be called while holding tbl->slot_tbl_lock |
| 334 | */ |
| 335 | static void |
| 336 | nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *free_slot) |
| 337 | { |
| 338 | int free_slotid = free_slot - tbl->slots; |
| 339 | int slotid = free_slotid; |
| 340 | |
| 341 | BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE); |
| 342 | /* clear used bit in bitmap */ |
| 343 | __clear_bit(slotid, tbl->used_slots); |
| 344 | |
| 345 | /* update highest_used_slotid when it is freed */ |
| 346 | if (slotid == tbl->highest_used_slotid) { |
| 347 | slotid = find_last_bit(tbl->used_slots, tbl->max_slots); |
| 348 | if (slotid < tbl->max_slots) |
| 349 | tbl->highest_used_slotid = slotid; |
| 350 | else |
| 351 | tbl->highest_used_slotid = -1; |
| 352 | } |
| 353 | dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__, |
| 354 | free_slotid, tbl->highest_used_slotid); |
| 355 | } |
| 356 | |
| 357 | /* |
| 358 | * Signal state manager thread if session is drained |
| 359 | */ |
| 360 | static void nfs41_check_drain_session_complete(struct nfs4_session *ses) |
| 361 | { |
| 362 | struct rpc_task *task; |
| 363 | |
| 364 | if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) { |
| 365 | task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq); |
| 366 | if (task) |
| 367 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); |
| 368 | return; |
| 369 | } |
| 370 | |
| 371 | if (ses->fc_slot_table.highest_used_slotid != -1) |
| 372 | return; |
| 373 | |
| 374 | dprintk("%s COMPLETE: Session Drained\n", __func__); |
| 375 | complete(&ses->complete); |
| 376 | } |
| 377 | |
| 378 | static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) |
| 379 | { |
| 380 | struct nfs4_slot_table *tbl; |
| 381 | |
| 382 | tbl = &res->sr_session->fc_slot_table; |
| 383 | if (!res->sr_slot) { |
| 384 | /* just wake up the next guy waiting since |
| 385 | * we may have not consumed a slot after all */ |
| 386 | dprintk("%s: No slot\n", __func__); |
| 387 | return; |
| 388 | } |
| 389 | |
| 390 | spin_lock(&tbl->slot_tbl_lock); |
| 391 | nfs4_free_slot(tbl, res->sr_slot); |
| 392 | nfs41_check_drain_session_complete(res->sr_session); |
| 393 | spin_unlock(&tbl->slot_tbl_lock); |
| 394 | res->sr_slot = NULL; |
| 395 | } |
| 396 | |
| 397 | static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) |
| 398 | { |
| 399 | unsigned long timestamp; |
| 400 | struct nfs_client *clp; |
| 401 | |
| 402 | /* |
| 403 | * sr_status remains 1 if an RPC level error occurred. The server |
| 404 | * may or may not have processed the sequence operation.. |
| 405 | * Proceed as if the server received and processed the sequence |
| 406 | * operation. |
| 407 | */ |
| 408 | if (res->sr_status == 1) |
| 409 | res->sr_status = NFS_OK; |
| 410 | |
| 411 | /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */ |
| 412 | if (!res->sr_slot) |
| 413 | goto out; |
| 414 | |
| 415 | /* Check the SEQUENCE operation status */ |
| 416 | switch (res->sr_status) { |
| 417 | case 0: |
| 418 | /* Update the slot's sequence and clientid lease timer */ |
| 419 | ++res->sr_slot->seq_nr; |
| 420 | timestamp = res->sr_renewal_time; |
| 421 | clp = res->sr_session->clp; |
| 422 | do_renew_lease(clp, timestamp); |
| 423 | /* Check sequence flags */ |
| 424 | if (atomic_read(&clp->cl_count) > 1) |
| 425 | nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags); |
| 426 | break; |
| 427 | case -NFS4ERR_DELAY: |
| 428 | /* The server detected a resend of the RPC call and |
| 429 | * returned NFS4ERR_DELAY as per Section 2.10.6.2 |
| 430 | * of RFC5661. |
| 431 | */ |
| 432 | dprintk("%s: slot=%td seq=%d: Operation in progress\n", |
| 433 | __func__, |
| 434 | res->sr_slot - res->sr_session->fc_slot_table.slots, |
| 435 | res->sr_slot->seq_nr); |
| 436 | goto out_retry; |
| 437 | default: |
| 438 | /* Just update the slot sequence no. */ |
| 439 | ++res->sr_slot->seq_nr; |
| 440 | } |
| 441 | out: |
| 442 | /* The session may be reset by one of the error handlers. */ |
| 443 | dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); |
| 444 | nfs41_sequence_free_slot(res); |
| 445 | return 1; |
| 446 | out_retry: |
| 447 | if (!rpc_restart_call(task)) |
| 448 | goto out; |
| 449 | rpc_delay(task, NFS4_POLL_RETRY_MAX); |
| 450 | return 0; |
| 451 | } |
| 452 | |
| 453 | static int nfs4_sequence_done(struct rpc_task *task, |
| 454 | struct nfs4_sequence_res *res) |
| 455 | { |
| 456 | if (res->sr_session == NULL) |
| 457 | return 1; |
| 458 | return nfs41_sequence_done(task, res); |
| 459 | } |
| 460 | |
| 461 | /* |
| 462 | * nfs4_find_slot - efficiently look for a free slot |
| 463 | * |
| 464 | * nfs4_find_slot looks for an unset bit in the used_slots bitmap. |
| 465 | * If found, we mark the slot as used, update the highest_used_slotid, |
| 466 | * and respectively set up the sequence operation args. |
| 467 | * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise. |
| 468 | * |
| 469 | * Note: must be called with under the slot_tbl_lock. |
| 470 | */ |
| 471 | static u8 |
| 472 | nfs4_find_slot(struct nfs4_slot_table *tbl) |
| 473 | { |
| 474 | int slotid; |
| 475 | u8 ret_id = NFS4_MAX_SLOT_TABLE; |
| 476 | BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE); |
| 477 | |
| 478 | dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n", |
| 479 | __func__, tbl->used_slots[0], tbl->highest_used_slotid, |
| 480 | tbl->max_slots); |
| 481 | slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots); |
| 482 | if (slotid >= tbl->max_slots) |
| 483 | goto out; |
| 484 | __set_bit(slotid, tbl->used_slots); |
| 485 | if (slotid > tbl->highest_used_slotid) |
| 486 | tbl->highest_used_slotid = slotid; |
| 487 | ret_id = slotid; |
| 488 | out: |
| 489 | dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n", |
| 490 | __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id); |
| 491 | return ret_id; |
| 492 | } |
| 493 | |
| 494 | static int nfs41_setup_sequence(struct nfs4_session *session, |
| 495 | struct nfs4_sequence_args *args, |
| 496 | struct nfs4_sequence_res *res, |
| 497 | int cache_reply, |
| 498 | struct rpc_task *task) |
| 499 | { |
| 500 | struct nfs4_slot *slot; |
| 501 | struct nfs4_slot_table *tbl; |
| 502 | u8 slotid; |
| 503 | |
| 504 | dprintk("--> %s\n", __func__); |
| 505 | /* slot already allocated? */ |
| 506 | if (res->sr_slot != NULL) |
| 507 | return 0; |
| 508 | |
| 509 | tbl = &session->fc_slot_table; |
| 510 | |
| 511 | spin_lock(&tbl->slot_tbl_lock); |
| 512 | if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) && |
| 513 | !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) { |
| 514 | /* |
| 515 | * The state manager will wait until the slot table is empty. |
| 516 | * Schedule the reset thread |
| 517 | */ |
| 518 | rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); |
| 519 | spin_unlock(&tbl->slot_tbl_lock); |
| 520 | dprintk("%s Schedule Session Reset\n", __func__); |
| 521 | return -EAGAIN; |
| 522 | } |
| 523 | |
| 524 | if (!rpc_queue_empty(&tbl->slot_tbl_waitq) && |
| 525 | !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) { |
| 526 | rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); |
| 527 | spin_unlock(&tbl->slot_tbl_lock); |
| 528 | dprintk("%s enforce FIFO order\n", __func__); |
| 529 | return -EAGAIN; |
| 530 | } |
| 531 | |
| 532 | slotid = nfs4_find_slot(tbl); |
| 533 | if (slotid == NFS4_MAX_SLOT_TABLE) { |
| 534 | rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); |
| 535 | spin_unlock(&tbl->slot_tbl_lock); |
| 536 | dprintk("<-- %s: no free slots\n", __func__); |
| 537 | return -EAGAIN; |
| 538 | } |
| 539 | spin_unlock(&tbl->slot_tbl_lock); |
| 540 | |
| 541 | rpc_task_set_priority(task, RPC_PRIORITY_NORMAL); |
| 542 | slot = tbl->slots + slotid; |
| 543 | args->sa_session = session; |
| 544 | args->sa_slotid = slotid; |
| 545 | args->sa_cache_this = cache_reply; |
| 546 | |
| 547 | dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr); |
| 548 | |
| 549 | res->sr_session = session; |
| 550 | res->sr_slot = slot; |
| 551 | res->sr_renewal_time = jiffies; |
| 552 | res->sr_status_flags = 0; |
| 553 | /* |
| 554 | * sr_status is only set in decode_sequence, and so will remain |
| 555 | * set to 1 if an rpc level failure occurs. |
| 556 | */ |
| 557 | res->sr_status = 1; |
| 558 | return 0; |
| 559 | } |
| 560 | |
| 561 | int nfs4_setup_sequence(const struct nfs_server *server, |
| 562 | struct nfs4_sequence_args *args, |
| 563 | struct nfs4_sequence_res *res, |
| 564 | int cache_reply, |
| 565 | struct rpc_task *task) |
| 566 | { |
| 567 | struct nfs4_session *session = nfs4_get_session(server); |
| 568 | int ret = 0; |
| 569 | |
| 570 | if (session == NULL) { |
| 571 | args->sa_session = NULL; |
| 572 | res->sr_session = NULL; |
| 573 | goto out; |
| 574 | } |
| 575 | |
| 576 | dprintk("--> %s clp %p session %p sr_slot %td\n", |
| 577 | __func__, session->clp, session, res->sr_slot ? |
| 578 | res->sr_slot - session->fc_slot_table.slots : -1); |
| 579 | |
| 580 | ret = nfs41_setup_sequence(session, args, res, cache_reply, |
| 581 | task); |
| 582 | out: |
| 583 | dprintk("<-- %s status=%d\n", __func__, ret); |
| 584 | return ret; |
| 585 | } |
| 586 | |
| 587 | struct nfs41_call_sync_data { |
| 588 | const struct nfs_server *seq_server; |
| 589 | struct nfs4_sequence_args *seq_args; |
| 590 | struct nfs4_sequence_res *seq_res; |
| 591 | int cache_reply; |
| 592 | }; |
| 593 | |
| 594 | static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) |
| 595 | { |
| 596 | struct nfs41_call_sync_data *data = calldata; |
| 597 | |
| 598 | dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server); |
| 599 | |
| 600 | if (nfs4_setup_sequence(data->seq_server, data->seq_args, |
| 601 | data->seq_res, data->cache_reply, task)) |
| 602 | return; |
| 603 | rpc_call_start(task); |
| 604 | } |
| 605 | |
| 606 | static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata) |
| 607 | { |
| 608 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); |
| 609 | nfs41_call_sync_prepare(task, calldata); |
| 610 | } |
| 611 | |
| 612 | static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) |
| 613 | { |
| 614 | struct nfs41_call_sync_data *data = calldata; |
| 615 | |
| 616 | nfs41_sequence_done(task, data->seq_res); |
| 617 | } |
| 618 | |
| 619 | struct rpc_call_ops nfs41_call_sync_ops = { |
| 620 | .rpc_call_prepare = nfs41_call_sync_prepare, |
| 621 | .rpc_call_done = nfs41_call_sync_done, |
| 622 | }; |
| 623 | |
| 624 | struct rpc_call_ops nfs41_call_priv_sync_ops = { |
| 625 | .rpc_call_prepare = nfs41_call_priv_sync_prepare, |
| 626 | .rpc_call_done = nfs41_call_sync_done, |
| 627 | }; |
| 628 | |
| 629 | static int nfs4_call_sync_sequence(struct nfs_server *server, |
| 630 | struct rpc_message *msg, |
| 631 | struct nfs4_sequence_args *args, |
| 632 | struct nfs4_sequence_res *res, |
| 633 | int cache_reply, |
| 634 | int privileged) |
| 635 | { |
| 636 | int ret; |
| 637 | struct rpc_task *task; |
| 638 | struct nfs41_call_sync_data data = { |
| 639 | .seq_server = server, |
| 640 | .seq_args = args, |
| 641 | .seq_res = res, |
| 642 | .cache_reply = cache_reply, |
| 643 | }; |
| 644 | struct rpc_task_setup task_setup = { |
| 645 | .rpc_client = server->client, |
| 646 | .rpc_message = msg, |
| 647 | .callback_ops = &nfs41_call_sync_ops, |
| 648 | .callback_data = &data |
| 649 | }; |
| 650 | |
| 651 | res->sr_slot = NULL; |
| 652 | if (privileged) |
| 653 | task_setup.callback_ops = &nfs41_call_priv_sync_ops; |
| 654 | task = rpc_run_task(&task_setup); |
| 655 | if (IS_ERR(task)) |
| 656 | ret = PTR_ERR(task); |
| 657 | else { |
| 658 | ret = task->tk_status; |
| 659 | rpc_put_task(task); |
| 660 | } |
| 661 | return ret; |
| 662 | } |
| 663 | |
| 664 | int _nfs4_call_sync_session(struct nfs_server *server, |
| 665 | struct rpc_message *msg, |
| 666 | struct nfs4_sequence_args *args, |
| 667 | struct nfs4_sequence_res *res, |
| 668 | int cache_reply) |
| 669 | { |
| 670 | return nfs4_call_sync_sequence(server, msg, args, res, cache_reply, 0); |
| 671 | } |
| 672 | |
| 673 | #else |
| 674 | static int nfs4_sequence_done(struct rpc_task *task, |
| 675 | struct nfs4_sequence_res *res) |
| 676 | { |
| 677 | return 1; |
| 678 | } |
| 679 | #endif /* CONFIG_NFS_V4_1 */ |
| 680 | |
| 681 | int _nfs4_call_sync(struct nfs_server *server, |
| 682 | struct rpc_message *msg, |
| 683 | struct nfs4_sequence_args *args, |
| 684 | struct nfs4_sequence_res *res, |
| 685 | int cache_reply) |
| 686 | { |
| 687 | args->sa_session = res->sr_session = NULL; |
| 688 | return rpc_call_sync(server->client, msg, 0); |
| 689 | } |
| 690 | |
| 691 | #define nfs4_call_sync(server, msg, args, res, cache_reply) \ |
| 692 | (server)->nfs_client->cl_mvops->call_sync((server), (msg), &(args)->seq_args, \ |
| 693 | &(res)->seq_res, (cache_reply)) |
| 694 | |
| 695 | static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo) |
| 696 | { |
| 697 | struct nfs_inode *nfsi = NFS_I(dir); |
| 698 | |
| 699 | spin_lock(&dir->i_lock); |
| 700 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA; |
| 701 | if (!cinfo->atomic || cinfo->before != nfsi->change_attr) |
| 702 | nfs_force_lookup_revalidate(dir); |
| 703 | nfsi->change_attr = cinfo->after; |
| 704 | spin_unlock(&dir->i_lock); |
| 705 | } |
| 706 | |
| 707 | struct nfs4_opendata { |
| 708 | struct kref kref; |
| 709 | struct nfs_openargs o_arg; |
| 710 | struct nfs_openres o_res; |
| 711 | struct nfs_open_confirmargs c_arg; |
| 712 | struct nfs_open_confirmres c_res; |
| 713 | struct nfs_fattr f_attr; |
| 714 | struct nfs_fattr dir_attr; |
| 715 | struct path path; |
| 716 | struct dentry *dir; |
| 717 | struct nfs4_state_owner *owner; |
| 718 | struct nfs4_state *state; |
| 719 | struct iattr attrs; |
| 720 | unsigned long timestamp; |
| 721 | unsigned int rpc_done : 1; |
| 722 | int rpc_status; |
| 723 | int cancelled; |
| 724 | }; |
| 725 | |
| 726 | |
| 727 | static void nfs4_init_opendata_res(struct nfs4_opendata *p) |
| 728 | { |
| 729 | p->o_res.f_attr = &p->f_attr; |
| 730 | p->o_res.dir_attr = &p->dir_attr; |
| 731 | p->o_res.seqid = p->o_arg.seqid; |
| 732 | p->c_res.seqid = p->c_arg.seqid; |
| 733 | p->o_res.server = p->o_arg.server; |
| 734 | nfs_fattr_init(&p->f_attr); |
| 735 | nfs_fattr_init(&p->dir_attr); |
| 736 | } |
| 737 | |
| 738 | static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path, |
| 739 | struct nfs4_state_owner *sp, fmode_t fmode, int flags, |
| 740 | const struct iattr *attrs, |
| 741 | gfp_t gfp_mask) |
| 742 | { |
| 743 | struct dentry *parent = dget_parent(path->dentry); |
| 744 | struct inode *dir = parent->d_inode; |
| 745 | struct nfs_server *server = NFS_SERVER(dir); |
| 746 | struct nfs4_opendata *p; |
| 747 | |
| 748 | p = kzalloc(sizeof(*p), gfp_mask); |
| 749 | if (p == NULL) |
| 750 | goto err; |
| 751 | p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask); |
| 752 | if (p->o_arg.seqid == NULL) |
| 753 | goto err_free; |
| 754 | path_get(path); |
| 755 | p->path = *path; |
| 756 | p->dir = parent; |
| 757 | p->owner = sp; |
| 758 | atomic_inc(&sp->so_count); |
| 759 | p->o_arg.fh = NFS_FH(dir); |
| 760 | p->o_arg.open_flags = flags; |
| 761 | p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); |
| 762 | p->o_arg.clientid = server->nfs_client->cl_clientid; |
| 763 | p->o_arg.id = sp->so_owner_id.id; |
| 764 | p->o_arg.name = &p->path.dentry->d_name; |
| 765 | p->o_arg.server = server; |
| 766 | p->o_arg.bitmask = server->attr_bitmask; |
| 767 | p->o_arg.claim = NFS4_OPEN_CLAIM_NULL; |
| 768 | if (flags & O_CREAT) { |
| 769 | u32 *s; |
| 770 | |
| 771 | p->o_arg.u.attrs = &p->attrs; |
| 772 | memcpy(&p->attrs, attrs, sizeof(p->attrs)); |
| 773 | s = (u32 *) p->o_arg.u.verifier.data; |
| 774 | s[0] = jiffies; |
| 775 | s[1] = current->pid; |
| 776 | } |
| 777 | p->c_arg.fh = &p->o_res.fh; |
| 778 | p->c_arg.stateid = &p->o_res.stateid; |
| 779 | p->c_arg.seqid = p->o_arg.seqid; |
| 780 | nfs4_init_opendata_res(p); |
| 781 | kref_init(&p->kref); |
| 782 | return p; |
| 783 | err_free: |
| 784 | kfree(p); |
| 785 | err: |
| 786 | dput(parent); |
| 787 | return NULL; |
| 788 | } |
| 789 | |
| 790 | static void nfs4_opendata_free(struct kref *kref) |
| 791 | { |
| 792 | struct nfs4_opendata *p = container_of(kref, |
| 793 | struct nfs4_opendata, kref); |
| 794 | |
| 795 | nfs_free_seqid(p->o_arg.seqid); |
| 796 | if (p->state != NULL) |
| 797 | nfs4_put_open_state(p->state); |
| 798 | nfs4_put_state_owner(p->owner); |
| 799 | dput(p->dir); |
| 800 | path_put(&p->path); |
| 801 | kfree(p); |
| 802 | } |
| 803 | |
| 804 | static void nfs4_opendata_put(struct nfs4_opendata *p) |
| 805 | { |
| 806 | if (p != NULL) |
| 807 | kref_put(&p->kref, nfs4_opendata_free); |
| 808 | } |
| 809 | |
| 810 | static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task) |
| 811 | { |
| 812 | int ret; |
| 813 | |
| 814 | ret = rpc_wait_for_completion_task(task); |
| 815 | return ret; |
| 816 | } |
| 817 | |
| 818 | static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode) |
| 819 | { |
| 820 | int ret = 0; |
| 821 | |
| 822 | if (open_mode & O_EXCL) |
| 823 | goto out; |
| 824 | switch (mode & (FMODE_READ|FMODE_WRITE)) { |
| 825 | case FMODE_READ: |
| 826 | ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 |
| 827 | && state->n_rdonly != 0; |
| 828 | break; |
| 829 | case FMODE_WRITE: |
| 830 | ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 |
| 831 | && state->n_wronly != 0; |
| 832 | break; |
| 833 | case FMODE_READ|FMODE_WRITE: |
| 834 | ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 |
| 835 | && state->n_rdwr != 0; |
| 836 | } |
| 837 | out: |
| 838 | return ret; |
| 839 | } |
| 840 | |
| 841 | static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode) |
| 842 | { |
| 843 | if ((delegation->type & fmode) != fmode) |
| 844 | return 0; |
| 845 | if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) |
| 846 | return 0; |
| 847 | nfs_mark_delegation_referenced(delegation); |
| 848 | return 1; |
| 849 | } |
| 850 | |
| 851 | static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) |
| 852 | { |
| 853 | switch (fmode) { |
| 854 | case FMODE_WRITE: |
| 855 | state->n_wronly++; |
| 856 | break; |
| 857 | case FMODE_READ: |
| 858 | state->n_rdonly++; |
| 859 | break; |
| 860 | case FMODE_READ|FMODE_WRITE: |
| 861 | state->n_rdwr++; |
| 862 | } |
| 863 | nfs4_state_set_mode_locked(state, state->state | fmode); |
| 864 | } |
| 865 | |
| 866 | static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) |
| 867 | { |
| 868 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) |
| 869 | memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data)); |
| 870 | memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data)); |
| 871 | switch (fmode) { |
| 872 | case FMODE_READ: |
| 873 | set_bit(NFS_O_RDONLY_STATE, &state->flags); |
| 874 | break; |
| 875 | case FMODE_WRITE: |
| 876 | set_bit(NFS_O_WRONLY_STATE, &state->flags); |
| 877 | break; |
| 878 | case FMODE_READ|FMODE_WRITE: |
| 879 | set_bit(NFS_O_RDWR_STATE, &state->flags); |
| 880 | } |
| 881 | } |
| 882 | |
| 883 | static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) |
| 884 | { |
| 885 | write_seqlock(&state->seqlock); |
| 886 | nfs_set_open_stateid_locked(state, stateid, fmode); |
| 887 | write_sequnlock(&state->seqlock); |
| 888 | } |
| 889 | |
| 890 | static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode) |
| 891 | { |
| 892 | /* |
| 893 | * Protect the call to nfs4_state_set_mode_locked and |
| 894 | * serialise the stateid update |
| 895 | */ |
| 896 | write_seqlock(&state->seqlock); |
| 897 | if (deleg_stateid != NULL) { |
| 898 | memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data)); |
| 899 | set_bit(NFS_DELEGATED_STATE, &state->flags); |
| 900 | } |
| 901 | if (open_stateid != NULL) |
| 902 | nfs_set_open_stateid_locked(state, open_stateid, fmode); |
| 903 | write_sequnlock(&state->seqlock); |
| 904 | spin_lock(&state->owner->so_lock); |
| 905 | update_open_stateflags(state, fmode); |
| 906 | spin_unlock(&state->owner->so_lock); |
| 907 | } |
| 908 | |
| 909 | static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode) |
| 910 | { |
| 911 | struct nfs_inode *nfsi = NFS_I(state->inode); |
| 912 | struct nfs_delegation *deleg_cur; |
| 913 | int ret = 0; |
| 914 | |
| 915 | fmode &= (FMODE_READ|FMODE_WRITE); |
| 916 | |
| 917 | rcu_read_lock(); |
| 918 | deleg_cur = rcu_dereference(nfsi->delegation); |
| 919 | if (deleg_cur == NULL) |
| 920 | goto no_delegation; |
| 921 | |
| 922 | spin_lock(&deleg_cur->lock); |
| 923 | if (nfsi->delegation != deleg_cur || |
| 924 | (deleg_cur->type & fmode) != fmode) |
| 925 | goto no_delegation_unlock; |
| 926 | |
| 927 | if (delegation == NULL) |
| 928 | delegation = &deleg_cur->stateid; |
| 929 | else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0) |
| 930 | goto no_delegation_unlock; |
| 931 | |
| 932 | nfs_mark_delegation_referenced(deleg_cur); |
| 933 | __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode); |
| 934 | ret = 1; |
| 935 | no_delegation_unlock: |
| 936 | spin_unlock(&deleg_cur->lock); |
| 937 | no_delegation: |
| 938 | rcu_read_unlock(); |
| 939 | |
| 940 | if (!ret && open_stateid != NULL) { |
| 941 | __update_open_stateid(state, open_stateid, NULL, fmode); |
| 942 | ret = 1; |
| 943 | } |
| 944 | |
| 945 | return ret; |
| 946 | } |
| 947 | |
| 948 | |
| 949 | static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) |
| 950 | { |
| 951 | struct nfs_delegation *delegation; |
| 952 | |
| 953 | rcu_read_lock(); |
| 954 | delegation = rcu_dereference(NFS_I(inode)->delegation); |
| 955 | if (delegation == NULL || (delegation->type & fmode) == fmode) { |
| 956 | rcu_read_unlock(); |
| 957 | return; |
| 958 | } |
| 959 | rcu_read_unlock(); |
| 960 | nfs_inode_return_delegation(inode); |
| 961 | } |
| 962 | |
| 963 | static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) |
| 964 | { |
| 965 | struct nfs4_state *state = opendata->state; |
| 966 | struct nfs_inode *nfsi = NFS_I(state->inode); |
| 967 | struct nfs_delegation *delegation; |
| 968 | int open_mode = opendata->o_arg.open_flags & O_EXCL; |
| 969 | fmode_t fmode = opendata->o_arg.fmode; |
| 970 | nfs4_stateid stateid; |
| 971 | int ret = -EAGAIN; |
| 972 | |
| 973 | for (;;) { |
| 974 | if (can_open_cached(state, fmode, open_mode)) { |
| 975 | spin_lock(&state->owner->so_lock); |
| 976 | if (can_open_cached(state, fmode, open_mode)) { |
| 977 | update_open_stateflags(state, fmode); |
| 978 | spin_unlock(&state->owner->so_lock); |
| 979 | goto out_return_state; |
| 980 | } |
| 981 | spin_unlock(&state->owner->so_lock); |
| 982 | } |
| 983 | rcu_read_lock(); |
| 984 | delegation = rcu_dereference(nfsi->delegation); |
| 985 | if (delegation == NULL || |
| 986 | !can_open_delegated(delegation, fmode)) { |
| 987 | rcu_read_unlock(); |
| 988 | break; |
| 989 | } |
| 990 | /* Save the delegation */ |
| 991 | memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data)); |
| 992 | rcu_read_unlock(); |
| 993 | ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); |
| 994 | if (ret != 0) |
| 995 | goto out; |
| 996 | ret = -EAGAIN; |
| 997 | |
| 998 | /* Try to update the stateid using the delegation */ |
| 999 | if (update_open_stateid(state, NULL, &stateid, fmode)) |
| 1000 | goto out_return_state; |
| 1001 | } |
| 1002 | out: |
| 1003 | return ERR_PTR(ret); |
| 1004 | out_return_state: |
| 1005 | atomic_inc(&state->count); |
| 1006 | return state; |
| 1007 | } |
| 1008 | |
| 1009 | static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) |
| 1010 | { |
| 1011 | struct inode *inode; |
| 1012 | struct nfs4_state *state = NULL; |
| 1013 | struct nfs_delegation *delegation; |
| 1014 | int ret; |
| 1015 | |
| 1016 | if (!data->rpc_done) { |
| 1017 | state = nfs4_try_open_cached(data); |
| 1018 | goto out; |
| 1019 | } |
| 1020 | |
| 1021 | ret = -EAGAIN; |
| 1022 | if (!(data->f_attr.valid & NFS_ATTR_FATTR)) |
| 1023 | goto err; |
| 1024 | inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr); |
| 1025 | ret = PTR_ERR(inode); |
| 1026 | if (IS_ERR(inode)) |
| 1027 | goto err; |
| 1028 | ret = -ENOMEM; |
| 1029 | state = nfs4_get_open_state(inode, data->owner); |
| 1030 | if (state == NULL) |
| 1031 | goto err_put_inode; |
| 1032 | if (data->o_res.delegation_type != 0) { |
| 1033 | int delegation_flags = 0; |
| 1034 | |
| 1035 | rcu_read_lock(); |
| 1036 | delegation = rcu_dereference(NFS_I(inode)->delegation); |
| 1037 | if (delegation) |
| 1038 | delegation_flags = delegation->flags; |
| 1039 | rcu_read_unlock(); |
| 1040 | if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) |
| 1041 | nfs_inode_set_delegation(state->inode, |
| 1042 | data->owner->so_cred, |
| 1043 | &data->o_res); |
| 1044 | else |
| 1045 | nfs_inode_reclaim_delegation(state->inode, |
| 1046 | data->owner->so_cred, |
| 1047 | &data->o_res); |
| 1048 | } |
| 1049 | |
| 1050 | update_open_stateid(state, &data->o_res.stateid, NULL, |
| 1051 | data->o_arg.fmode); |
| 1052 | iput(inode); |
| 1053 | out: |
| 1054 | return state; |
| 1055 | err_put_inode: |
| 1056 | iput(inode); |
| 1057 | err: |
| 1058 | return ERR_PTR(ret); |
| 1059 | } |
| 1060 | |
| 1061 | static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state) |
| 1062 | { |
| 1063 | struct nfs_inode *nfsi = NFS_I(state->inode); |
| 1064 | struct nfs_open_context *ctx; |
| 1065 | |
| 1066 | spin_lock(&state->inode->i_lock); |
| 1067 | list_for_each_entry(ctx, &nfsi->open_files, list) { |
| 1068 | if (ctx->state != state) |
| 1069 | continue; |
| 1070 | get_nfs_open_context(ctx); |
| 1071 | spin_unlock(&state->inode->i_lock); |
| 1072 | return ctx; |
| 1073 | } |
| 1074 | spin_unlock(&state->inode->i_lock); |
| 1075 | return ERR_PTR(-ENOENT); |
| 1076 | } |
| 1077 | |
| 1078 | static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state) |
| 1079 | { |
| 1080 | struct nfs4_opendata *opendata; |
| 1081 | |
| 1082 | opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS); |
| 1083 | if (opendata == NULL) |
| 1084 | return ERR_PTR(-ENOMEM); |
| 1085 | opendata->state = state; |
| 1086 | atomic_inc(&state->count); |
| 1087 | return opendata; |
| 1088 | } |
| 1089 | |
| 1090 | static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res) |
| 1091 | { |
| 1092 | struct nfs4_state *newstate; |
| 1093 | int ret; |
| 1094 | |
| 1095 | opendata->o_arg.open_flags = 0; |
| 1096 | opendata->o_arg.fmode = fmode; |
| 1097 | memset(&opendata->o_res, 0, sizeof(opendata->o_res)); |
| 1098 | memset(&opendata->c_res, 0, sizeof(opendata->c_res)); |
| 1099 | nfs4_init_opendata_res(opendata); |
| 1100 | ret = _nfs4_recover_proc_open(opendata); |
| 1101 | if (ret != 0) |
| 1102 | return ret; |
| 1103 | newstate = nfs4_opendata_to_nfs4_state(opendata); |
| 1104 | if (IS_ERR(newstate)) |
| 1105 | return PTR_ERR(newstate); |
| 1106 | nfs4_close_state(&opendata->path, newstate, fmode); |
| 1107 | *res = newstate; |
| 1108 | return 0; |
| 1109 | } |
| 1110 | |
| 1111 | static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) |
| 1112 | { |
| 1113 | struct nfs4_state *newstate; |
| 1114 | int ret; |
| 1115 | |
| 1116 | /* memory barrier prior to reading state->n_* */ |
| 1117 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
| 1118 | smp_rmb(); |
| 1119 | if (state->n_rdwr != 0) { |
| 1120 | clear_bit(NFS_O_RDWR_STATE, &state->flags); |
| 1121 | ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate); |
| 1122 | if (ret != 0) |
| 1123 | return ret; |
| 1124 | if (newstate != state) |
| 1125 | return -ESTALE; |
| 1126 | } |
| 1127 | if (state->n_wronly != 0) { |
| 1128 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); |
| 1129 | ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate); |
| 1130 | if (ret != 0) |
| 1131 | return ret; |
| 1132 | if (newstate != state) |
| 1133 | return -ESTALE; |
| 1134 | } |
| 1135 | if (state->n_rdonly != 0) { |
| 1136 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); |
| 1137 | ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate); |
| 1138 | if (ret != 0) |
| 1139 | return ret; |
| 1140 | if (newstate != state) |
| 1141 | return -ESTALE; |
| 1142 | } |
| 1143 | /* |
| 1144 | * We may have performed cached opens for all three recoveries. |
| 1145 | * Check if we need to update the current stateid. |
| 1146 | */ |
| 1147 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && |
| 1148 | memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) { |
| 1149 | write_seqlock(&state->seqlock); |
| 1150 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) |
| 1151 | memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)); |
| 1152 | write_sequnlock(&state->seqlock); |
| 1153 | } |
| 1154 | return 0; |
| 1155 | } |
| 1156 | |
| 1157 | /* |
| 1158 | * OPEN_RECLAIM: |
| 1159 | * reclaim state on the server after a reboot. |
| 1160 | */ |
| 1161 | static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
| 1162 | { |
| 1163 | struct nfs_delegation *delegation; |
| 1164 | struct nfs4_opendata *opendata; |
| 1165 | fmode_t delegation_type = 0; |
| 1166 | int status; |
| 1167 | |
| 1168 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
| 1169 | if (IS_ERR(opendata)) |
| 1170 | return PTR_ERR(opendata); |
| 1171 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS; |
| 1172 | opendata->o_arg.fh = NFS_FH(state->inode); |
| 1173 | rcu_read_lock(); |
| 1174 | delegation = rcu_dereference(NFS_I(state->inode)->delegation); |
| 1175 | if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) |
| 1176 | delegation_type = delegation->type; |
| 1177 | rcu_read_unlock(); |
| 1178 | opendata->o_arg.u.delegation_type = delegation_type; |
| 1179 | status = nfs4_open_recover(opendata, state); |
| 1180 | nfs4_opendata_put(opendata); |
| 1181 | return status; |
| 1182 | } |
| 1183 | |
| 1184 | static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
| 1185 | { |
| 1186 | struct nfs_server *server = NFS_SERVER(state->inode); |
| 1187 | struct nfs4_exception exception = { }; |
| 1188 | int err; |
| 1189 | do { |
| 1190 | err = _nfs4_do_open_reclaim(ctx, state); |
| 1191 | if (err != -NFS4ERR_DELAY) |
| 1192 | break; |
| 1193 | nfs4_handle_exception(server, err, &exception); |
| 1194 | } while (exception.retry); |
| 1195 | return err; |
| 1196 | } |
| 1197 | |
| 1198 | static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) |
| 1199 | { |
| 1200 | struct nfs_open_context *ctx; |
| 1201 | int ret; |
| 1202 | |
| 1203 | ctx = nfs4_state_find_open_context(state); |
| 1204 | if (IS_ERR(ctx)) |
| 1205 | return PTR_ERR(ctx); |
| 1206 | ret = nfs4_do_open_reclaim(ctx, state); |
| 1207 | put_nfs_open_context(ctx); |
| 1208 | return ret; |
| 1209 | } |
| 1210 | |
| 1211 | static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) |
| 1212 | { |
| 1213 | struct nfs4_opendata *opendata; |
| 1214 | int ret; |
| 1215 | |
| 1216 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
| 1217 | if (IS_ERR(opendata)) |
| 1218 | return PTR_ERR(opendata); |
| 1219 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR; |
| 1220 | memcpy(opendata->o_arg.u.delegation.data, stateid->data, |
| 1221 | sizeof(opendata->o_arg.u.delegation.data)); |
| 1222 | ret = nfs4_open_recover(opendata, state); |
| 1223 | nfs4_opendata_put(opendata); |
| 1224 | return ret; |
| 1225 | } |
| 1226 | |
| 1227 | int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) |
| 1228 | { |
| 1229 | struct nfs4_exception exception = { }; |
| 1230 | struct nfs_server *server = NFS_SERVER(state->inode); |
| 1231 | int err; |
| 1232 | do { |
| 1233 | err = _nfs4_open_delegation_recall(ctx, state, stateid); |
| 1234 | switch (err) { |
| 1235 | case 0: |
| 1236 | case -ENOENT: |
| 1237 | case -ESTALE: |
| 1238 | goto out; |
| 1239 | case -NFS4ERR_BADSESSION: |
| 1240 | case -NFS4ERR_BADSLOT: |
| 1241 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 1242 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
| 1243 | case -NFS4ERR_DEADSESSION: |
| 1244 | nfs4_schedule_state_recovery( |
| 1245 | server->nfs_client); |
| 1246 | goto out; |
| 1247 | case -NFS4ERR_STALE_CLIENTID: |
| 1248 | case -NFS4ERR_STALE_STATEID: |
| 1249 | case -NFS4ERR_EXPIRED: |
| 1250 | /* Don't recall a delegation if it was lost */ |
| 1251 | nfs4_schedule_state_recovery(server->nfs_client); |
| 1252 | goto out; |
| 1253 | case -ERESTARTSYS: |
| 1254 | /* |
| 1255 | * The show must go on: exit, but mark the |
| 1256 | * stateid as needing recovery. |
| 1257 | */ |
| 1258 | case -NFS4ERR_ADMIN_REVOKED: |
| 1259 | case -NFS4ERR_BAD_STATEID: |
| 1260 | nfs4_state_mark_reclaim_nograce(server->nfs_client, state); |
| 1261 | case -EKEYEXPIRED: |
| 1262 | /* |
| 1263 | * User RPCSEC_GSS context has expired. |
| 1264 | * We cannot recover this stateid now, so |
| 1265 | * skip it and allow recovery thread to |
| 1266 | * proceed. |
| 1267 | */ |
| 1268 | case -ENOMEM: |
| 1269 | err = 0; |
| 1270 | goto out; |
| 1271 | } |
| 1272 | err = nfs4_handle_exception(server, err, &exception); |
| 1273 | } while (exception.retry); |
| 1274 | out: |
| 1275 | return err; |
| 1276 | } |
| 1277 | |
| 1278 | static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) |
| 1279 | { |
| 1280 | struct nfs4_opendata *data = calldata; |
| 1281 | |
| 1282 | data->rpc_status = task->tk_status; |
| 1283 | if (data->rpc_status == 0) { |
| 1284 | memcpy(data->o_res.stateid.data, data->c_res.stateid.data, |
| 1285 | sizeof(data->o_res.stateid.data)); |
| 1286 | nfs_confirm_seqid(&data->owner->so_seqid, 0); |
| 1287 | renew_lease(data->o_res.server, data->timestamp); |
| 1288 | data->rpc_done = 1; |
| 1289 | } |
| 1290 | } |
| 1291 | |
| 1292 | static void nfs4_open_confirm_release(void *calldata) |
| 1293 | { |
| 1294 | struct nfs4_opendata *data = calldata; |
| 1295 | struct nfs4_state *state = NULL; |
| 1296 | |
| 1297 | /* If this request hasn't been cancelled, do nothing */ |
| 1298 | if (data->cancelled == 0) |
| 1299 | goto out_free; |
| 1300 | /* In case of error, no cleanup! */ |
| 1301 | if (!data->rpc_done) |
| 1302 | goto out_free; |
| 1303 | state = nfs4_opendata_to_nfs4_state(data); |
| 1304 | if (!IS_ERR(state)) |
| 1305 | nfs4_close_state(&data->path, state, data->o_arg.fmode); |
| 1306 | out_free: |
| 1307 | nfs4_opendata_put(data); |
| 1308 | } |
| 1309 | |
| 1310 | static const struct rpc_call_ops nfs4_open_confirm_ops = { |
| 1311 | .rpc_call_done = nfs4_open_confirm_done, |
| 1312 | .rpc_release = nfs4_open_confirm_release, |
| 1313 | }; |
| 1314 | |
| 1315 | /* |
| 1316 | * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata |
| 1317 | */ |
| 1318 | static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) |
| 1319 | { |
| 1320 | struct nfs_server *server = NFS_SERVER(data->dir->d_inode); |
| 1321 | struct rpc_task *task; |
| 1322 | struct rpc_message msg = { |
| 1323 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], |
| 1324 | .rpc_argp = &data->c_arg, |
| 1325 | .rpc_resp = &data->c_res, |
| 1326 | .rpc_cred = data->owner->so_cred, |
| 1327 | }; |
| 1328 | struct rpc_task_setup task_setup_data = { |
| 1329 | .rpc_client = server->client, |
| 1330 | .rpc_message = &msg, |
| 1331 | .callback_ops = &nfs4_open_confirm_ops, |
| 1332 | .callback_data = data, |
| 1333 | .workqueue = nfsiod_workqueue, |
| 1334 | .flags = RPC_TASK_ASYNC, |
| 1335 | }; |
| 1336 | int status; |
| 1337 | |
| 1338 | kref_get(&data->kref); |
| 1339 | data->rpc_done = 0; |
| 1340 | data->rpc_status = 0; |
| 1341 | data->timestamp = jiffies; |
| 1342 | task = rpc_run_task(&task_setup_data); |
| 1343 | if (IS_ERR(task)) |
| 1344 | return PTR_ERR(task); |
| 1345 | status = nfs4_wait_for_completion_rpc_task(task); |
| 1346 | if (status != 0) { |
| 1347 | data->cancelled = 1; |
| 1348 | smp_wmb(); |
| 1349 | } else |
| 1350 | status = data->rpc_status; |
| 1351 | rpc_put_task(task); |
| 1352 | return status; |
| 1353 | } |
| 1354 | |
| 1355 | static void nfs4_open_prepare(struct rpc_task *task, void *calldata) |
| 1356 | { |
| 1357 | struct nfs4_opendata *data = calldata; |
| 1358 | struct nfs4_state_owner *sp = data->owner; |
| 1359 | |
| 1360 | if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) |
| 1361 | return; |
| 1362 | /* |
| 1363 | * Check if we still need to send an OPEN call, or if we can use |
| 1364 | * a delegation instead. |
| 1365 | */ |
| 1366 | if (data->state != NULL) { |
| 1367 | struct nfs_delegation *delegation; |
| 1368 | |
| 1369 | if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags)) |
| 1370 | goto out_no_action; |
| 1371 | rcu_read_lock(); |
| 1372 | delegation = rcu_dereference(NFS_I(data->state->inode)->delegation); |
| 1373 | if (delegation != NULL && |
| 1374 | test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) { |
| 1375 | rcu_read_unlock(); |
| 1376 | goto out_no_action; |
| 1377 | } |
| 1378 | rcu_read_unlock(); |
| 1379 | } |
| 1380 | /* Update sequence id. */ |
| 1381 | data->o_arg.id = sp->so_owner_id.id; |
| 1382 | data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid; |
| 1383 | if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) { |
| 1384 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; |
| 1385 | nfs_copy_fh(&data->o_res.fh, data->o_arg.fh); |
| 1386 | } |
| 1387 | data->timestamp = jiffies; |
| 1388 | if (nfs4_setup_sequence(data->o_arg.server, |
| 1389 | &data->o_arg.seq_args, |
| 1390 | &data->o_res.seq_res, 1, task)) |
| 1391 | return; |
| 1392 | rpc_call_start(task); |
| 1393 | return; |
| 1394 | out_no_action: |
| 1395 | task->tk_action = NULL; |
| 1396 | |
| 1397 | } |
| 1398 | |
| 1399 | static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata) |
| 1400 | { |
| 1401 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); |
| 1402 | nfs4_open_prepare(task, calldata); |
| 1403 | } |
| 1404 | |
| 1405 | static void nfs4_open_done(struct rpc_task *task, void *calldata) |
| 1406 | { |
| 1407 | struct nfs4_opendata *data = calldata; |
| 1408 | |
| 1409 | data->rpc_status = task->tk_status; |
| 1410 | |
| 1411 | if (!nfs4_sequence_done(task, &data->o_res.seq_res)) |
| 1412 | return; |
| 1413 | |
| 1414 | if (task->tk_status == 0) { |
| 1415 | switch (data->o_res.f_attr->mode & S_IFMT) { |
| 1416 | case S_IFREG: |
| 1417 | break; |
| 1418 | case S_IFLNK: |
| 1419 | data->rpc_status = -ELOOP; |
| 1420 | break; |
| 1421 | case S_IFDIR: |
| 1422 | data->rpc_status = -EISDIR; |
| 1423 | break; |
| 1424 | default: |
| 1425 | data->rpc_status = -ENOTDIR; |
| 1426 | } |
| 1427 | renew_lease(data->o_res.server, data->timestamp); |
| 1428 | if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) |
| 1429 | nfs_confirm_seqid(&data->owner->so_seqid, 0); |
| 1430 | } |
| 1431 | data->rpc_done = 1; |
| 1432 | } |
| 1433 | |
| 1434 | static void nfs4_open_release(void *calldata) |
| 1435 | { |
| 1436 | struct nfs4_opendata *data = calldata; |
| 1437 | struct nfs4_state *state = NULL; |
| 1438 | |
| 1439 | /* If this request hasn't been cancelled, do nothing */ |
| 1440 | if (data->cancelled == 0) |
| 1441 | goto out_free; |
| 1442 | /* In case of error, no cleanup! */ |
| 1443 | if (data->rpc_status != 0 || !data->rpc_done) |
| 1444 | goto out_free; |
| 1445 | /* In case we need an open_confirm, no cleanup! */ |
| 1446 | if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) |
| 1447 | goto out_free; |
| 1448 | state = nfs4_opendata_to_nfs4_state(data); |
| 1449 | if (!IS_ERR(state)) |
| 1450 | nfs4_close_state(&data->path, state, data->o_arg.fmode); |
| 1451 | out_free: |
| 1452 | nfs4_opendata_put(data); |
| 1453 | } |
| 1454 | |
| 1455 | static const struct rpc_call_ops nfs4_open_ops = { |
| 1456 | .rpc_call_prepare = nfs4_open_prepare, |
| 1457 | .rpc_call_done = nfs4_open_done, |
| 1458 | .rpc_release = nfs4_open_release, |
| 1459 | }; |
| 1460 | |
| 1461 | static const struct rpc_call_ops nfs4_recover_open_ops = { |
| 1462 | .rpc_call_prepare = nfs4_recover_open_prepare, |
| 1463 | .rpc_call_done = nfs4_open_done, |
| 1464 | .rpc_release = nfs4_open_release, |
| 1465 | }; |
| 1466 | |
| 1467 | static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover) |
| 1468 | { |
| 1469 | struct inode *dir = data->dir->d_inode; |
| 1470 | struct nfs_server *server = NFS_SERVER(dir); |
| 1471 | struct nfs_openargs *o_arg = &data->o_arg; |
| 1472 | struct nfs_openres *o_res = &data->o_res; |
| 1473 | struct rpc_task *task; |
| 1474 | struct rpc_message msg = { |
| 1475 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], |
| 1476 | .rpc_argp = o_arg, |
| 1477 | .rpc_resp = o_res, |
| 1478 | .rpc_cred = data->owner->so_cred, |
| 1479 | }; |
| 1480 | struct rpc_task_setup task_setup_data = { |
| 1481 | .rpc_client = server->client, |
| 1482 | .rpc_message = &msg, |
| 1483 | .callback_ops = &nfs4_open_ops, |
| 1484 | .callback_data = data, |
| 1485 | .workqueue = nfsiod_workqueue, |
| 1486 | .flags = RPC_TASK_ASYNC, |
| 1487 | }; |
| 1488 | int status; |
| 1489 | |
| 1490 | kref_get(&data->kref); |
| 1491 | data->rpc_done = 0; |
| 1492 | data->rpc_status = 0; |
| 1493 | data->cancelled = 0; |
| 1494 | if (isrecover) |
| 1495 | task_setup_data.callback_ops = &nfs4_recover_open_ops; |
| 1496 | task = rpc_run_task(&task_setup_data); |
| 1497 | if (IS_ERR(task)) |
| 1498 | return PTR_ERR(task); |
| 1499 | status = nfs4_wait_for_completion_rpc_task(task); |
| 1500 | if (status != 0) { |
| 1501 | data->cancelled = 1; |
| 1502 | smp_wmb(); |
| 1503 | } else |
| 1504 | status = data->rpc_status; |
| 1505 | rpc_put_task(task); |
| 1506 | |
| 1507 | return status; |
| 1508 | } |
| 1509 | |
| 1510 | static int _nfs4_recover_proc_open(struct nfs4_opendata *data) |
| 1511 | { |
| 1512 | struct inode *dir = data->dir->d_inode; |
| 1513 | struct nfs_openres *o_res = &data->o_res; |
| 1514 | int status; |
| 1515 | |
| 1516 | status = nfs4_run_open_task(data, 1); |
| 1517 | if (status != 0 || !data->rpc_done) |
| 1518 | return status; |
| 1519 | |
| 1520 | nfs_refresh_inode(dir, o_res->dir_attr); |
| 1521 | |
| 1522 | if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { |
| 1523 | status = _nfs4_proc_open_confirm(data); |
| 1524 | if (status != 0) |
| 1525 | return status; |
| 1526 | } |
| 1527 | |
| 1528 | return status; |
| 1529 | } |
| 1530 | |
| 1531 | /* |
| 1532 | * Note: On error, nfs4_proc_open will free the struct nfs4_opendata |
| 1533 | */ |
| 1534 | static int _nfs4_proc_open(struct nfs4_opendata *data) |
| 1535 | { |
| 1536 | struct inode *dir = data->dir->d_inode; |
| 1537 | struct nfs_server *server = NFS_SERVER(dir); |
| 1538 | struct nfs_openargs *o_arg = &data->o_arg; |
| 1539 | struct nfs_openres *o_res = &data->o_res; |
| 1540 | int status; |
| 1541 | |
| 1542 | status = nfs4_run_open_task(data, 0); |
| 1543 | if (status != 0 || !data->rpc_done) |
| 1544 | return status; |
| 1545 | |
| 1546 | if (o_arg->open_flags & O_CREAT) { |
| 1547 | update_changeattr(dir, &o_res->cinfo); |
| 1548 | nfs_post_op_update_inode(dir, o_res->dir_attr); |
| 1549 | } else |
| 1550 | nfs_refresh_inode(dir, o_res->dir_attr); |
| 1551 | if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) |
| 1552 | server->caps &= ~NFS_CAP_POSIX_LOCK; |
| 1553 | if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { |
| 1554 | status = _nfs4_proc_open_confirm(data); |
| 1555 | if (status != 0) |
| 1556 | return status; |
| 1557 | } |
| 1558 | if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) |
| 1559 | _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr); |
| 1560 | return 0; |
| 1561 | } |
| 1562 | |
| 1563 | static int nfs4_recover_expired_lease(struct nfs_server *server) |
| 1564 | { |
| 1565 | struct nfs_client *clp = server->nfs_client; |
| 1566 | unsigned int loop; |
| 1567 | int ret; |
| 1568 | |
| 1569 | for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { |
| 1570 | ret = nfs4_wait_clnt_recover(clp); |
| 1571 | if (ret != 0) |
| 1572 | break; |
| 1573 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && |
| 1574 | !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) |
| 1575 | break; |
| 1576 | nfs4_schedule_state_recovery(clp); |
| 1577 | ret = -EIO; |
| 1578 | } |
| 1579 | return ret; |
| 1580 | } |
| 1581 | |
| 1582 | /* |
| 1583 | * OPEN_EXPIRED: |
| 1584 | * reclaim state on the server after a network partition. |
| 1585 | * Assumes caller holds the appropriate lock |
| 1586 | */ |
| 1587 | static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
| 1588 | { |
| 1589 | struct nfs4_opendata *opendata; |
| 1590 | int ret; |
| 1591 | |
| 1592 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
| 1593 | if (IS_ERR(opendata)) |
| 1594 | return PTR_ERR(opendata); |
| 1595 | ret = nfs4_open_recover(opendata, state); |
| 1596 | if (ret == -ESTALE) |
| 1597 | d_drop(ctx->path.dentry); |
| 1598 | nfs4_opendata_put(opendata); |
| 1599 | return ret; |
| 1600 | } |
| 1601 | |
| 1602 | static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
| 1603 | { |
| 1604 | struct nfs_server *server = NFS_SERVER(state->inode); |
| 1605 | struct nfs4_exception exception = { }; |
| 1606 | int err; |
| 1607 | |
| 1608 | do { |
| 1609 | err = _nfs4_open_expired(ctx, state); |
| 1610 | switch (err) { |
| 1611 | default: |
| 1612 | goto out; |
| 1613 | case -NFS4ERR_GRACE: |
| 1614 | case -NFS4ERR_DELAY: |
| 1615 | nfs4_handle_exception(server, err, &exception); |
| 1616 | err = 0; |
| 1617 | } |
| 1618 | } while (exception.retry); |
| 1619 | out: |
| 1620 | return err; |
| 1621 | } |
| 1622 | |
| 1623 | static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) |
| 1624 | { |
| 1625 | struct nfs_open_context *ctx; |
| 1626 | int ret; |
| 1627 | |
| 1628 | ctx = nfs4_state_find_open_context(state); |
| 1629 | if (IS_ERR(ctx)) |
| 1630 | return PTR_ERR(ctx); |
| 1631 | ret = nfs4_do_open_expired(ctx, state); |
| 1632 | put_nfs_open_context(ctx); |
| 1633 | return ret; |
| 1634 | } |
| 1635 | |
| 1636 | /* |
| 1637 | * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* |
| 1638 | * fields corresponding to attributes that were used to store the verifier. |
| 1639 | * Make sure we clobber those fields in the later setattr call |
| 1640 | */ |
| 1641 | static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr) |
| 1642 | { |
| 1643 | if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) && |
| 1644 | !(sattr->ia_valid & ATTR_ATIME_SET)) |
| 1645 | sattr->ia_valid |= ATTR_ATIME; |
| 1646 | |
| 1647 | if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) && |
| 1648 | !(sattr->ia_valid & ATTR_MTIME_SET)) |
| 1649 | sattr->ia_valid |= ATTR_MTIME; |
| 1650 | } |
| 1651 | |
| 1652 | /* |
| 1653 | * Returns a referenced nfs4_state |
| 1654 | */ |
| 1655 | static int _nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res) |
| 1656 | { |
| 1657 | struct nfs4_state_owner *sp; |
| 1658 | struct nfs4_state *state = NULL; |
| 1659 | struct nfs_server *server = NFS_SERVER(dir); |
| 1660 | struct nfs4_opendata *opendata; |
| 1661 | int status; |
| 1662 | |
| 1663 | /* Protect against reboot recovery conflicts */ |
| 1664 | status = -ENOMEM; |
| 1665 | if (!(sp = nfs4_get_state_owner(server, cred))) { |
| 1666 | dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); |
| 1667 | goto out_err; |
| 1668 | } |
| 1669 | status = nfs4_recover_expired_lease(server); |
| 1670 | if (status != 0) |
| 1671 | goto err_put_state_owner; |
| 1672 | if (path->dentry->d_inode != NULL) |
| 1673 | nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode); |
| 1674 | status = -ENOMEM; |
| 1675 | opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL); |
| 1676 | if (opendata == NULL) |
| 1677 | goto err_put_state_owner; |
| 1678 | |
| 1679 | if (path->dentry->d_inode != NULL) |
| 1680 | opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp); |
| 1681 | |
| 1682 | status = _nfs4_proc_open(opendata); |
| 1683 | if (status != 0) |
| 1684 | goto err_opendata_put; |
| 1685 | |
| 1686 | state = nfs4_opendata_to_nfs4_state(opendata); |
| 1687 | status = PTR_ERR(state); |
| 1688 | if (IS_ERR(state)) |
| 1689 | goto err_opendata_put; |
| 1690 | if (server->caps & NFS_CAP_POSIX_LOCK) |
| 1691 | set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); |
| 1692 | |
| 1693 | if (opendata->o_arg.open_flags & O_EXCL) { |
| 1694 | nfs4_exclusive_attrset(opendata, sattr); |
| 1695 | |
| 1696 | nfs_fattr_init(opendata->o_res.f_attr); |
| 1697 | status = nfs4_do_setattr(state->inode, cred, |
| 1698 | opendata->o_res.f_attr, sattr, |
| 1699 | state); |
| 1700 | if (status == 0) |
| 1701 | nfs_setattr_update_inode(state->inode, sattr); |
| 1702 | nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr); |
| 1703 | } |
| 1704 | nfs4_opendata_put(opendata); |
| 1705 | nfs4_put_state_owner(sp); |
| 1706 | *res = state; |
| 1707 | return 0; |
| 1708 | err_opendata_put: |
| 1709 | nfs4_opendata_put(opendata); |
| 1710 | err_put_state_owner: |
| 1711 | nfs4_put_state_owner(sp); |
| 1712 | out_err: |
| 1713 | *res = NULL; |
| 1714 | return status; |
| 1715 | } |
| 1716 | |
| 1717 | |
| 1718 | static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred) |
| 1719 | { |
| 1720 | struct nfs4_exception exception = { }; |
| 1721 | struct nfs4_state *res; |
| 1722 | int status; |
| 1723 | |
| 1724 | do { |
| 1725 | status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res); |
| 1726 | if (status == 0) |
| 1727 | break; |
| 1728 | /* NOTE: BAD_SEQID means the server and client disagree about the |
| 1729 | * book-keeping w.r.t. state-changing operations |
| 1730 | * (OPEN/CLOSE/LOCK/LOCKU...) |
| 1731 | * It is actually a sign of a bug on the client or on the server. |
| 1732 | * |
| 1733 | * If we receive a BAD_SEQID error in the particular case of |
| 1734 | * doing an OPEN, we assume that nfs_increment_open_seqid() will |
| 1735 | * have unhashed the old state_owner for us, and that we can |
| 1736 | * therefore safely retry using a new one. We should still warn |
| 1737 | * the user though... |
| 1738 | */ |
| 1739 | if (status == -NFS4ERR_BAD_SEQID) { |
| 1740 | printk(KERN_WARNING "NFS: v4 server %s " |
| 1741 | " returned a bad sequence-id error!\n", |
| 1742 | NFS_SERVER(dir)->nfs_client->cl_hostname); |
| 1743 | exception.retry = 1; |
| 1744 | continue; |
| 1745 | } |
| 1746 | /* |
| 1747 | * BAD_STATEID on OPEN means that the server cancelled our |
| 1748 | * state before it received the OPEN_CONFIRM. |
| 1749 | * Recover by retrying the request as per the discussion |
| 1750 | * on Page 181 of RFC3530. |
| 1751 | */ |
| 1752 | if (status == -NFS4ERR_BAD_STATEID) { |
| 1753 | exception.retry = 1; |
| 1754 | continue; |
| 1755 | } |
| 1756 | if (status == -EAGAIN) { |
| 1757 | /* We must have found a delegation */ |
| 1758 | exception.retry = 1; |
| 1759 | continue; |
| 1760 | } |
| 1761 | res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir), |
| 1762 | status, &exception)); |
| 1763 | } while (exception.retry); |
| 1764 | return res; |
| 1765 | } |
| 1766 | |
| 1767 | static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
| 1768 | struct nfs_fattr *fattr, struct iattr *sattr, |
| 1769 | struct nfs4_state *state) |
| 1770 | { |
| 1771 | struct nfs_server *server = NFS_SERVER(inode); |
| 1772 | struct nfs_setattrargs arg = { |
| 1773 | .fh = NFS_FH(inode), |
| 1774 | .iap = sattr, |
| 1775 | .server = server, |
| 1776 | .bitmask = server->attr_bitmask, |
| 1777 | }; |
| 1778 | struct nfs_setattrres res = { |
| 1779 | .fattr = fattr, |
| 1780 | .server = server, |
| 1781 | }; |
| 1782 | struct rpc_message msg = { |
| 1783 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], |
| 1784 | .rpc_argp = &arg, |
| 1785 | .rpc_resp = &res, |
| 1786 | .rpc_cred = cred, |
| 1787 | }; |
| 1788 | unsigned long timestamp = jiffies; |
| 1789 | int status; |
| 1790 | |
| 1791 | nfs_fattr_init(fattr); |
| 1792 | |
| 1793 | if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) { |
| 1794 | /* Use that stateid */ |
| 1795 | } else if (state != NULL) { |
| 1796 | nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid); |
| 1797 | } else |
| 1798 | memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid)); |
| 1799 | |
| 1800 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
| 1801 | if (status == 0 && state != NULL) |
| 1802 | renew_lease(server, timestamp); |
| 1803 | return status; |
| 1804 | } |
| 1805 | |
| 1806 | static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
| 1807 | struct nfs_fattr *fattr, struct iattr *sattr, |
| 1808 | struct nfs4_state *state) |
| 1809 | { |
| 1810 | struct nfs_server *server = NFS_SERVER(inode); |
| 1811 | struct nfs4_exception exception = { }; |
| 1812 | int err; |
| 1813 | do { |
| 1814 | err = nfs4_handle_exception(server, |
| 1815 | _nfs4_do_setattr(inode, cred, fattr, sattr, state), |
| 1816 | &exception); |
| 1817 | } while (exception.retry); |
| 1818 | return err; |
| 1819 | } |
| 1820 | |
| 1821 | struct nfs4_closedata { |
| 1822 | struct path path; |
| 1823 | struct inode *inode; |
| 1824 | struct nfs4_state *state; |
| 1825 | struct nfs_closeargs arg; |
| 1826 | struct nfs_closeres res; |
| 1827 | struct nfs_fattr fattr; |
| 1828 | unsigned long timestamp; |
| 1829 | }; |
| 1830 | |
| 1831 | static void nfs4_free_closedata(void *data) |
| 1832 | { |
| 1833 | struct nfs4_closedata *calldata = data; |
| 1834 | struct nfs4_state_owner *sp = calldata->state->owner; |
| 1835 | |
| 1836 | nfs4_put_open_state(calldata->state); |
| 1837 | nfs_free_seqid(calldata->arg.seqid); |
| 1838 | nfs4_put_state_owner(sp); |
| 1839 | path_put(&calldata->path); |
| 1840 | kfree(calldata); |
| 1841 | } |
| 1842 | |
| 1843 | static void nfs4_close_clear_stateid_flags(struct nfs4_state *state, |
| 1844 | fmode_t fmode) |
| 1845 | { |
| 1846 | spin_lock(&state->owner->so_lock); |
| 1847 | if (!(fmode & FMODE_READ)) |
| 1848 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); |
| 1849 | if (!(fmode & FMODE_WRITE)) |
| 1850 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); |
| 1851 | clear_bit(NFS_O_RDWR_STATE, &state->flags); |
| 1852 | spin_unlock(&state->owner->so_lock); |
| 1853 | } |
| 1854 | |
| 1855 | static void nfs4_close_done(struct rpc_task *task, void *data) |
| 1856 | { |
| 1857 | struct nfs4_closedata *calldata = data; |
| 1858 | struct nfs4_state *state = calldata->state; |
| 1859 | struct nfs_server *server = NFS_SERVER(calldata->inode); |
| 1860 | |
| 1861 | if (!nfs4_sequence_done(task, &calldata->res.seq_res)) |
| 1862 | return; |
| 1863 | /* hmm. we are done with the inode, and in the process of freeing |
| 1864 | * the state_owner. we keep this around to process errors |
| 1865 | */ |
| 1866 | switch (task->tk_status) { |
| 1867 | case 0: |
| 1868 | nfs_set_open_stateid(state, &calldata->res.stateid, 0); |
| 1869 | renew_lease(server, calldata->timestamp); |
| 1870 | nfs4_close_clear_stateid_flags(state, |
| 1871 | calldata->arg.fmode); |
| 1872 | break; |
| 1873 | case -NFS4ERR_STALE_STATEID: |
| 1874 | case -NFS4ERR_OLD_STATEID: |
| 1875 | case -NFS4ERR_BAD_STATEID: |
| 1876 | case -NFS4ERR_EXPIRED: |
| 1877 | if (calldata->arg.fmode == 0) |
| 1878 | break; |
| 1879 | default: |
| 1880 | if (nfs4_async_handle_error(task, server, state) == -EAGAIN) |
| 1881 | rpc_restart_call_prepare(task); |
| 1882 | } |
| 1883 | nfs_release_seqid(calldata->arg.seqid); |
| 1884 | nfs_refresh_inode(calldata->inode, calldata->res.fattr); |
| 1885 | } |
| 1886 | |
| 1887 | static void nfs4_close_prepare(struct rpc_task *task, void *data) |
| 1888 | { |
| 1889 | struct nfs4_closedata *calldata = data; |
| 1890 | struct nfs4_state *state = calldata->state; |
| 1891 | int call_close = 0; |
| 1892 | |
| 1893 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
| 1894 | return; |
| 1895 | |
| 1896 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; |
| 1897 | calldata->arg.fmode = FMODE_READ|FMODE_WRITE; |
| 1898 | spin_lock(&state->owner->so_lock); |
| 1899 | /* Calculate the change in open mode */ |
| 1900 | if (state->n_rdwr == 0) { |
| 1901 | if (state->n_rdonly == 0) { |
| 1902 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
| 1903 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); |
| 1904 | calldata->arg.fmode &= ~FMODE_READ; |
| 1905 | } |
| 1906 | if (state->n_wronly == 0) { |
| 1907 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
| 1908 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); |
| 1909 | calldata->arg.fmode &= ~FMODE_WRITE; |
| 1910 | } |
| 1911 | } |
| 1912 | spin_unlock(&state->owner->so_lock); |
| 1913 | |
| 1914 | if (!call_close) { |
| 1915 | /* Note: exit _without_ calling nfs4_close_done */ |
| 1916 | task->tk_action = NULL; |
| 1917 | return; |
| 1918 | } |
| 1919 | |
| 1920 | if (calldata->arg.fmode == 0) |
| 1921 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; |
| 1922 | |
| 1923 | nfs_fattr_init(calldata->res.fattr); |
| 1924 | calldata->timestamp = jiffies; |
| 1925 | if (nfs4_setup_sequence(NFS_SERVER(calldata->inode), |
| 1926 | &calldata->arg.seq_args, &calldata->res.seq_res, |
| 1927 | 1, task)) |
| 1928 | return; |
| 1929 | rpc_call_start(task); |
| 1930 | } |
| 1931 | |
| 1932 | static const struct rpc_call_ops nfs4_close_ops = { |
| 1933 | .rpc_call_prepare = nfs4_close_prepare, |
| 1934 | .rpc_call_done = nfs4_close_done, |
| 1935 | .rpc_release = nfs4_free_closedata, |
| 1936 | }; |
| 1937 | |
| 1938 | /* |
| 1939 | * It is possible for data to be read/written from a mem-mapped file |
| 1940 | * after the sys_close call (which hits the vfs layer as a flush). |
| 1941 | * This means that we can't safely call nfsv4 close on a file until |
| 1942 | * the inode is cleared. This in turn means that we are not good |
| 1943 | * NFSv4 citizens - we do not indicate to the server to update the file's |
| 1944 | * share state even when we are done with one of the three share |
| 1945 | * stateid's in the inode. |
| 1946 | * |
| 1947 | * NOTE: Caller must be holding the sp->so_owner semaphore! |
| 1948 | */ |
| 1949 | int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait) |
| 1950 | { |
| 1951 | struct nfs_server *server = NFS_SERVER(state->inode); |
| 1952 | struct nfs4_closedata *calldata; |
| 1953 | struct nfs4_state_owner *sp = state->owner; |
| 1954 | struct rpc_task *task; |
| 1955 | struct rpc_message msg = { |
| 1956 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], |
| 1957 | .rpc_cred = state->owner->so_cred, |
| 1958 | }; |
| 1959 | struct rpc_task_setup task_setup_data = { |
| 1960 | .rpc_client = server->client, |
| 1961 | .rpc_message = &msg, |
| 1962 | .callback_ops = &nfs4_close_ops, |
| 1963 | .workqueue = nfsiod_workqueue, |
| 1964 | .flags = RPC_TASK_ASYNC, |
| 1965 | }; |
| 1966 | int status = -ENOMEM; |
| 1967 | |
| 1968 | calldata = kzalloc(sizeof(*calldata), gfp_mask); |
| 1969 | if (calldata == NULL) |
| 1970 | goto out; |
| 1971 | calldata->inode = state->inode; |
| 1972 | calldata->state = state; |
| 1973 | calldata->arg.fh = NFS_FH(state->inode); |
| 1974 | calldata->arg.stateid = &state->open_stateid; |
| 1975 | /* Serialization for the sequence id */ |
| 1976 | calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask); |
| 1977 | if (calldata->arg.seqid == NULL) |
| 1978 | goto out_free_calldata; |
| 1979 | calldata->arg.fmode = 0; |
| 1980 | calldata->arg.bitmask = server->cache_consistency_bitmask; |
| 1981 | calldata->res.fattr = &calldata->fattr; |
| 1982 | calldata->res.seqid = calldata->arg.seqid; |
| 1983 | calldata->res.server = server; |
| 1984 | path_get(path); |
| 1985 | calldata->path = *path; |
| 1986 | |
| 1987 | msg.rpc_argp = &calldata->arg, |
| 1988 | msg.rpc_resp = &calldata->res, |
| 1989 | task_setup_data.callback_data = calldata; |
| 1990 | task = rpc_run_task(&task_setup_data); |
| 1991 | if (IS_ERR(task)) |
| 1992 | return PTR_ERR(task); |
| 1993 | status = 0; |
| 1994 | if (wait) |
| 1995 | status = rpc_wait_for_completion_task(task); |
| 1996 | rpc_put_task(task); |
| 1997 | return status; |
| 1998 | out_free_calldata: |
| 1999 | kfree(calldata); |
| 2000 | out: |
| 2001 | nfs4_put_open_state(state); |
| 2002 | nfs4_put_state_owner(sp); |
| 2003 | return status; |
| 2004 | } |
| 2005 | |
| 2006 | static struct inode * |
| 2007 | nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr) |
| 2008 | { |
| 2009 | struct nfs4_state *state; |
| 2010 | |
| 2011 | /* Protect against concurrent sillydeletes */ |
| 2012 | state = nfs4_do_open(dir, &ctx->path, ctx->mode, open_flags, attr, ctx->cred); |
| 2013 | if (IS_ERR(state)) |
| 2014 | return ERR_CAST(state); |
| 2015 | ctx->state = state; |
| 2016 | return igrab(state->inode); |
| 2017 | } |
| 2018 | |
| 2019 | static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) |
| 2020 | { |
| 2021 | if (ctx->state == NULL) |
| 2022 | return; |
| 2023 | if (is_sync) |
| 2024 | nfs4_close_sync(&ctx->path, ctx->state, ctx->mode); |
| 2025 | else |
| 2026 | nfs4_close_state(&ctx->path, ctx->state, ctx->mode); |
| 2027 | } |
| 2028 | |
| 2029 | static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) |
| 2030 | { |
| 2031 | struct nfs4_server_caps_arg args = { |
| 2032 | .fhandle = fhandle, |
| 2033 | }; |
| 2034 | struct nfs4_server_caps_res res = {}; |
| 2035 | struct rpc_message msg = { |
| 2036 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], |
| 2037 | .rpc_argp = &args, |
| 2038 | .rpc_resp = &res, |
| 2039 | }; |
| 2040 | int status; |
| 2041 | |
| 2042 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
| 2043 | if (status == 0) { |
| 2044 | memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); |
| 2045 | server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS| |
| 2046 | NFS_CAP_SYMLINKS|NFS_CAP_FILEID| |
| 2047 | NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER| |
| 2048 | NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME| |
| 2049 | NFS_CAP_CTIME|NFS_CAP_MTIME); |
| 2050 | if (res.attr_bitmask[0] & FATTR4_WORD0_ACL) |
| 2051 | server->caps |= NFS_CAP_ACLS; |
| 2052 | if (res.has_links != 0) |
| 2053 | server->caps |= NFS_CAP_HARDLINKS; |
| 2054 | if (res.has_symlinks != 0) |
| 2055 | server->caps |= NFS_CAP_SYMLINKS; |
| 2056 | if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID) |
| 2057 | server->caps |= NFS_CAP_FILEID; |
| 2058 | if (res.attr_bitmask[1] & FATTR4_WORD1_MODE) |
| 2059 | server->caps |= NFS_CAP_MODE; |
| 2060 | if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS) |
| 2061 | server->caps |= NFS_CAP_NLINK; |
| 2062 | if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER) |
| 2063 | server->caps |= NFS_CAP_OWNER; |
| 2064 | if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP) |
| 2065 | server->caps |= NFS_CAP_OWNER_GROUP; |
| 2066 | if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS) |
| 2067 | server->caps |= NFS_CAP_ATIME; |
| 2068 | if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA) |
| 2069 | server->caps |= NFS_CAP_CTIME; |
| 2070 | if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY) |
| 2071 | server->caps |= NFS_CAP_MTIME; |
| 2072 | |
| 2073 | memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); |
| 2074 | server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; |
| 2075 | server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; |
| 2076 | server->acl_bitmask = res.acl_bitmask; |
| 2077 | } |
| 2078 | |
| 2079 | return status; |
| 2080 | } |
| 2081 | |
| 2082 | int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) |
| 2083 | { |
| 2084 | struct nfs4_exception exception = { }; |
| 2085 | int err; |
| 2086 | do { |
| 2087 | err = nfs4_handle_exception(server, |
| 2088 | _nfs4_server_capabilities(server, fhandle), |
| 2089 | &exception); |
| 2090 | } while (exception.retry); |
| 2091 | return err; |
| 2092 | } |
| 2093 | |
| 2094 | static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, |
| 2095 | struct nfs_fsinfo *info) |
| 2096 | { |
| 2097 | struct nfs4_lookup_root_arg args = { |
| 2098 | .bitmask = nfs4_fattr_bitmap, |
| 2099 | }; |
| 2100 | struct nfs4_lookup_res res = { |
| 2101 | .server = server, |
| 2102 | .fattr = info->fattr, |
| 2103 | .fh = fhandle, |
| 2104 | }; |
| 2105 | struct rpc_message msg = { |
| 2106 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], |
| 2107 | .rpc_argp = &args, |
| 2108 | .rpc_resp = &res, |
| 2109 | }; |
| 2110 | |
| 2111 | nfs_fattr_init(info->fattr); |
| 2112 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
| 2113 | } |
| 2114 | |
| 2115 | static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, |
| 2116 | struct nfs_fsinfo *info) |
| 2117 | { |
| 2118 | struct nfs4_exception exception = { }; |
| 2119 | int err; |
| 2120 | do { |
| 2121 | err = nfs4_handle_exception(server, |
| 2122 | _nfs4_lookup_root(server, fhandle, info), |
| 2123 | &exception); |
| 2124 | } while (exception.retry); |
| 2125 | return err; |
| 2126 | } |
| 2127 | |
| 2128 | /* |
| 2129 | * get the file handle for the "/" directory on the server |
| 2130 | */ |
| 2131 | static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, |
| 2132 | struct nfs_fsinfo *info) |
| 2133 | { |
| 2134 | int status; |
| 2135 | |
| 2136 | status = nfs4_lookup_root(server, fhandle, info); |
| 2137 | if (status == 0) |
| 2138 | status = nfs4_server_capabilities(server, fhandle); |
| 2139 | if (status == 0) |
| 2140 | status = nfs4_do_fsinfo(server, fhandle, info); |
| 2141 | return nfs4_map_errors(status); |
| 2142 | } |
| 2143 | |
| 2144 | /* |
| 2145 | * Get locations and (maybe) other attributes of a referral. |
| 2146 | * Note that we'll actually follow the referral later when |
| 2147 | * we detect fsid mismatch in inode revalidation |
| 2148 | */ |
| 2149 | static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle) |
| 2150 | { |
| 2151 | int status = -ENOMEM; |
| 2152 | struct page *page = NULL; |
| 2153 | struct nfs4_fs_locations *locations = NULL; |
| 2154 | |
| 2155 | page = alloc_page(GFP_KERNEL); |
| 2156 | if (page == NULL) |
| 2157 | goto out; |
| 2158 | locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); |
| 2159 | if (locations == NULL) |
| 2160 | goto out; |
| 2161 | |
| 2162 | status = nfs4_proc_fs_locations(dir, name, locations, page); |
| 2163 | if (status != 0) |
| 2164 | goto out; |
| 2165 | /* Make sure server returned a different fsid for the referral */ |
| 2166 | if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { |
| 2167 | dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name); |
| 2168 | status = -EIO; |
| 2169 | goto out; |
| 2170 | } |
| 2171 | |
| 2172 | memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); |
| 2173 | fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL; |
| 2174 | if (!fattr->mode) |
| 2175 | fattr->mode = S_IFDIR; |
| 2176 | memset(fhandle, 0, sizeof(struct nfs_fh)); |
| 2177 | out: |
| 2178 | if (page) |
| 2179 | __free_page(page); |
| 2180 | kfree(locations); |
| 2181 | return status; |
| 2182 | } |
| 2183 | |
| 2184 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
| 2185 | { |
| 2186 | struct nfs4_getattr_arg args = { |
| 2187 | .fh = fhandle, |
| 2188 | .bitmask = server->attr_bitmask, |
| 2189 | }; |
| 2190 | struct nfs4_getattr_res res = { |
| 2191 | .fattr = fattr, |
| 2192 | .server = server, |
| 2193 | }; |
| 2194 | struct rpc_message msg = { |
| 2195 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], |
| 2196 | .rpc_argp = &args, |
| 2197 | .rpc_resp = &res, |
| 2198 | }; |
| 2199 | |
| 2200 | nfs_fattr_init(fattr); |
| 2201 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
| 2202 | } |
| 2203 | |
| 2204 | static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
| 2205 | { |
| 2206 | struct nfs4_exception exception = { }; |
| 2207 | int err; |
| 2208 | do { |
| 2209 | err = nfs4_handle_exception(server, |
| 2210 | _nfs4_proc_getattr(server, fhandle, fattr), |
| 2211 | &exception); |
| 2212 | } while (exception.retry); |
| 2213 | return err; |
| 2214 | } |
| 2215 | |
| 2216 | /* |
| 2217 | * The file is not closed if it is opened due to the a request to change |
| 2218 | * the size of the file. The open call will not be needed once the |
| 2219 | * VFS layer lookup-intents are implemented. |
| 2220 | * |
| 2221 | * Close is called when the inode is destroyed. |
| 2222 | * If we haven't opened the file for O_WRONLY, we |
| 2223 | * need to in the size_change case to obtain a stateid. |
| 2224 | * |
| 2225 | * Got race? |
| 2226 | * Because OPEN is always done by name in nfsv4, it is |
| 2227 | * possible that we opened a different file by the same |
| 2228 | * name. We can recognize this race condition, but we |
| 2229 | * can't do anything about it besides returning an error. |
| 2230 | * |
| 2231 | * This will be fixed with VFS changes (lookup-intent). |
| 2232 | */ |
| 2233 | static int |
| 2234 | nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, |
| 2235 | struct iattr *sattr) |
| 2236 | { |
| 2237 | struct inode *inode = dentry->d_inode; |
| 2238 | struct rpc_cred *cred = NULL; |
| 2239 | struct nfs4_state *state = NULL; |
| 2240 | int status; |
| 2241 | |
| 2242 | nfs_fattr_init(fattr); |
| 2243 | |
| 2244 | /* Search for an existing open(O_WRITE) file */ |
| 2245 | if (sattr->ia_valid & ATTR_FILE) { |
| 2246 | struct nfs_open_context *ctx; |
| 2247 | |
| 2248 | ctx = nfs_file_open_context(sattr->ia_file); |
| 2249 | if (ctx) { |
| 2250 | cred = ctx->cred; |
| 2251 | state = ctx->state; |
| 2252 | } |
| 2253 | } |
| 2254 | |
| 2255 | status = nfs4_do_setattr(inode, cred, fattr, sattr, state); |
| 2256 | if (status == 0) |
| 2257 | nfs_setattr_update_inode(inode, sattr); |
| 2258 | return status; |
| 2259 | } |
| 2260 | |
| 2261 | static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh, |
| 2262 | const struct qstr *name, struct nfs_fh *fhandle, |
| 2263 | struct nfs_fattr *fattr) |
| 2264 | { |
| 2265 | int status; |
| 2266 | struct nfs4_lookup_arg args = { |
| 2267 | .bitmask = server->attr_bitmask, |
| 2268 | .dir_fh = dirfh, |
| 2269 | .name = name, |
| 2270 | }; |
| 2271 | struct nfs4_lookup_res res = { |
| 2272 | .server = server, |
| 2273 | .fattr = fattr, |
| 2274 | .fh = fhandle, |
| 2275 | }; |
| 2276 | struct rpc_message msg = { |
| 2277 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], |
| 2278 | .rpc_argp = &args, |
| 2279 | .rpc_resp = &res, |
| 2280 | }; |
| 2281 | |
| 2282 | nfs_fattr_init(fattr); |
| 2283 | |
| 2284 | dprintk("NFS call lookupfh %s\n", name->name); |
| 2285 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
| 2286 | dprintk("NFS reply lookupfh: %d\n", status); |
| 2287 | return status; |
| 2288 | } |
| 2289 | |
| 2290 | static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh, |
| 2291 | struct qstr *name, struct nfs_fh *fhandle, |
| 2292 | struct nfs_fattr *fattr) |
| 2293 | { |
| 2294 | struct nfs4_exception exception = { }; |
| 2295 | int err; |
| 2296 | do { |
| 2297 | err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr); |
| 2298 | /* FIXME: !!!! */ |
| 2299 | if (err == -NFS4ERR_MOVED) { |
| 2300 | err = -EREMOTE; |
| 2301 | break; |
| 2302 | } |
| 2303 | err = nfs4_handle_exception(server, err, &exception); |
| 2304 | } while (exception.retry); |
| 2305 | return err; |
| 2306 | } |
| 2307 | |
| 2308 | static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, |
| 2309 | struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
| 2310 | { |
| 2311 | int status; |
| 2312 | |
| 2313 | dprintk("NFS call lookup %s\n", name->name); |
| 2314 | status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr); |
| 2315 | if (status == -NFS4ERR_MOVED) |
| 2316 | status = nfs4_get_referral(dir, name, fattr, fhandle); |
| 2317 | dprintk("NFS reply lookup: %d\n", status); |
| 2318 | return status; |
| 2319 | } |
| 2320 | |
| 2321 | static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
| 2322 | { |
| 2323 | struct nfs4_exception exception = { }; |
| 2324 | int err; |
| 2325 | do { |
| 2326 | err = nfs4_handle_exception(NFS_SERVER(dir), |
| 2327 | _nfs4_proc_lookup(dir, name, fhandle, fattr), |
| 2328 | &exception); |
| 2329 | } while (exception.retry); |
| 2330 | return err; |
| 2331 | } |
| 2332 | |
| 2333 | static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) |
| 2334 | { |
| 2335 | struct nfs_server *server = NFS_SERVER(inode); |
| 2336 | struct nfs4_accessargs args = { |
| 2337 | .fh = NFS_FH(inode), |
| 2338 | .bitmask = server->attr_bitmask, |
| 2339 | }; |
| 2340 | struct nfs4_accessres res = { |
| 2341 | .server = server, |
| 2342 | }; |
| 2343 | struct rpc_message msg = { |
| 2344 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], |
| 2345 | .rpc_argp = &args, |
| 2346 | .rpc_resp = &res, |
| 2347 | .rpc_cred = entry->cred, |
| 2348 | }; |
| 2349 | int mode = entry->mask; |
| 2350 | int status; |
| 2351 | |
| 2352 | /* |
| 2353 | * Determine which access bits we want to ask for... |
| 2354 | */ |
| 2355 | if (mode & MAY_READ) |
| 2356 | args.access |= NFS4_ACCESS_READ; |
| 2357 | if (S_ISDIR(inode->i_mode)) { |
| 2358 | if (mode & MAY_WRITE) |
| 2359 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; |
| 2360 | if (mode & MAY_EXEC) |
| 2361 | args.access |= NFS4_ACCESS_LOOKUP; |
| 2362 | } else { |
| 2363 | if (mode & MAY_WRITE) |
| 2364 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; |
| 2365 | if (mode & MAY_EXEC) |
| 2366 | args.access |= NFS4_ACCESS_EXECUTE; |
| 2367 | } |
| 2368 | |
| 2369 | res.fattr = nfs_alloc_fattr(); |
| 2370 | if (res.fattr == NULL) |
| 2371 | return -ENOMEM; |
| 2372 | |
| 2373 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
| 2374 | if (!status) { |
| 2375 | entry->mask = 0; |
| 2376 | if (res.access & NFS4_ACCESS_READ) |
| 2377 | entry->mask |= MAY_READ; |
| 2378 | if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE)) |
| 2379 | entry->mask |= MAY_WRITE; |
| 2380 | if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE)) |
| 2381 | entry->mask |= MAY_EXEC; |
| 2382 | nfs_refresh_inode(inode, res.fattr); |
| 2383 | } |
| 2384 | nfs_free_fattr(res.fattr); |
| 2385 | return status; |
| 2386 | } |
| 2387 | |
| 2388 | static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) |
| 2389 | { |
| 2390 | struct nfs4_exception exception = { }; |
| 2391 | int err; |
| 2392 | do { |
| 2393 | err = nfs4_handle_exception(NFS_SERVER(inode), |
| 2394 | _nfs4_proc_access(inode, entry), |
| 2395 | &exception); |
| 2396 | } while (exception.retry); |
| 2397 | return err; |
| 2398 | } |
| 2399 | |
| 2400 | /* |
| 2401 | * TODO: For the time being, we don't try to get any attributes |
| 2402 | * along with any of the zero-copy operations READ, READDIR, |
| 2403 | * READLINK, WRITE. |
| 2404 | * |
| 2405 | * In the case of the first three, we want to put the GETATTR |
| 2406 | * after the read-type operation -- this is because it is hard |
| 2407 | * to predict the length of a GETATTR response in v4, and thus |
| 2408 | * align the READ data correctly. This means that the GETATTR |
| 2409 | * may end up partially falling into the page cache, and we should |
| 2410 | * shift it into the 'tail' of the xdr_buf before processing. |
| 2411 | * To do this efficiently, we need to know the total length |
| 2412 | * of data received, which doesn't seem to be available outside |
| 2413 | * of the RPC layer. |
| 2414 | * |
| 2415 | * In the case of WRITE, we also want to put the GETATTR after |
| 2416 | * the operation -- in this case because we want to make sure |
| 2417 | * we get the post-operation mtime and size. This means that |
| 2418 | * we can't use xdr_encode_pages() as written: we need a variant |
| 2419 | * of it which would leave room in the 'tail' iovec. |
| 2420 | * |
| 2421 | * Both of these changes to the XDR layer would in fact be quite |
| 2422 | * minor, but I decided to leave them for a subsequent patch. |
| 2423 | */ |
| 2424 | static int _nfs4_proc_readlink(struct inode *inode, struct page *page, |
| 2425 | unsigned int pgbase, unsigned int pglen) |
| 2426 | { |
| 2427 | struct nfs4_readlink args = { |
| 2428 | .fh = NFS_FH(inode), |
| 2429 | .pgbase = pgbase, |
| 2430 | .pglen = pglen, |
| 2431 | .pages = &page, |
| 2432 | }; |
| 2433 | struct nfs4_readlink_res res; |
| 2434 | struct rpc_message msg = { |
| 2435 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], |
| 2436 | .rpc_argp = &args, |
| 2437 | .rpc_resp = &res, |
| 2438 | }; |
| 2439 | |
| 2440 | return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0); |
| 2441 | } |
| 2442 | |
| 2443 | static int nfs4_proc_readlink(struct inode *inode, struct page *page, |
| 2444 | unsigned int pgbase, unsigned int pglen) |
| 2445 | { |
| 2446 | struct nfs4_exception exception = { }; |
| 2447 | int err; |
| 2448 | do { |
| 2449 | err = nfs4_handle_exception(NFS_SERVER(inode), |
| 2450 | _nfs4_proc_readlink(inode, page, pgbase, pglen), |
| 2451 | &exception); |
| 2452 | } while (exception.retry); |
| 2453 | return err; |
| 2454 | } |
| 2455 | |
| 2456 | /* |
| 2457 | * Got race? |
| 2458 | * We will need to arrange for the VFS layer to provide an atomic open. |
| 2459 | * Until then, this create/open method is prone to inefficiency and race |
| 2460 | * conditions due to the lookup, create, and open VFS calls from sys_open() |
| 2461 | * placed on the wire. |
| 2462 | * |
| 2463 | * Given the above sorry state of affairs, I'm simply sending an OPEN. |
| 2464 | * The file will be opened again in the subsequent VFS open call |
| 2465 | * (nfs4_proc_file_open). |
| 2466 | * |
| 2467 | * The open for read will just hang around to be used by any process that |
| 2468 | * opens the file O_RDONLY. This will all be resolved with the VFS changes. |
| 2469 | */ |
| 2470 | |
| 2471 | static int |
| 2472 | nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, |
| 2473 | int flags, struct nfs_open_context *ctx) |
| 2474 | { |
| 2475 | struct path my_path = { |
| 2476 | .dentry = dentry, |
| 2477 | }; |
| 2478 | struct path *path = &my_path; |
| 2479 | struct nfs4_state *state; |
| 2480 | struct rpc_cred *cred = NULL; |
| 2481 | fmode_t fmode = 0; |
| 2482 | int status = 0; |
| 2483 | |
| 2484 | if (ctx != NULL) { |
| 2485 | cred = ctx->cred; |
| 2486 | path = &ctx->path; |
| 2487 | fmode = ctx->mode; |
| 2488 | } |
| 2489 | state = nfs4_do_open(dir, path, fmode, flags, sattr, cred); |
| 2490 | d_drop(dentry); |
| 2491 | if (IS_ERR(state)) { |
| 2492 | status = PTR_ERR(state); |
| 2493 | goto out; |
| 2494 | } |
| 2495 | d_add(dentry, igrab(state->inode)); |
| 2496 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); |
| 2497 | if (ctx != NULL) |
| 2498 | ctx->state = state; |
| 2499 | else |
| 2500 | nfs4_close_sync(path, state, fmode); |
| 2501 | out: |
| 2502 | return status; |
| 2503 | } |
| 2504 | |
| 2505 | static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) |
| 2506 | { |
| 2507 | struct nfs_server *server = NFS_SERVER(dir); |
| 2508 | struct nfs_removeargs args = { |
| 2509 | .fh = NFS_FH(dir), |
| 2510 | .name.len = name->len, |
| 2511 | .name.name = name->name, |
| 2512 | .bitmask = server->attr_bitmask, |
| 2513 | }; |
| 2514 | struct nfs_removeres res = { |
| 2515 | .server = server, |
| 2516 | }; |
| 2517 | struct rpc_message msg = { |
| 2518 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], |
| 2519 | .rpc_argp = &args, |
| 2520 | .rpc_resp = &res, |
| 2521 | }; |
| 2522 | int status = -ENOMEM; |
| 2523 | |
| 2524 | res.dir_attr = nfs_alloc_fattr(); |
| 2525 | if (res.dir_attr == NULL) |
| 2526 | goto out; |
| 2527 | |
| 2528 | status = nfs4_call_sync(server, &msg, &args, &res, 1); |
| 2529 | if (status == 0) { |
| 2530 | update_changeattr(dir, &res.cinfo); |
| 2531 | nfs_post_op_update_inode(dir, res.dir_attr); |
| 2532 | } |
| 2533 | nfs_free_fattr(res.dir_attr); |
| 2534 | out: |
| 2535 | return status; |
| 2536 | } |
| 2537 | |
| 2538 | static int nfs4_proc_remove(struct inode *dir, struct qstr *name) |
| 2539 | { |
| 2540 | struct nfs4_exception exception = { }; |
| 2541 | int err; |
| 2542 | do { |
| 2543 | err = nfs4_handle_exception(NFS_SERVER(dir), |
| 2544 | _nfs4_proc_remove(dir, name), |
| 2545 | &exception); |
| 2546 | } while (exception.retry); |
| 2547 | return err; |
| 2548 | } |
| 2549 | |
| 2550 | static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) |
| 2551 | { |
| 2552 | struct nfs_server *server = NFS_SERVER(dir); |
| 2553 | struct nfs_removeargs *args = msg->rpc_argp; |
| 2554 | struct nfs_removeres *res = msg->rpc_resp; |
| 2555 | |
| 2556 | args->bitmask = server->cache_consistency_bitmask; |
| 2557 | res->server = server; |
| 2558 | res->seq_res.sr_slot = NULL; |
| 2559 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; |
| 2560 | } |
| 2561 | |
| 2562 | static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) |
| 2563 | { |
| 2564 | struct nfs_removeres *res = task->tk_msg.rpc_resp; |
| 2565 | |
| 2566 | if (!nfs4_sequence_done(task, &res->seq_res)) |
| 2567 | return 0; |
| 2568 | if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN) |
| 2569 | return 0; |
| 2570 | update_changeattr(dir, &res->cinfo); |
| 2571 | nfs_post_op_update_inode(dir, res->dir_attr); |
| 2572 | return 1; |
| 2573 | } |
| 2574 | |
| 2575 | static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir) |
| 2576 | { |
| 2577 | struct nfs_server *server = NFS_SERVER(dir); |
| 2578 | struct nfs_renameargs *arg = msg->rpc_argp; |
| 2579 | struct nfs_renameres *res = msg->rpc_resp; |
| 2580 | |
| 2581 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME]; |
| 2582 | arg->bitmask = server->attr_bitmask; |
| 2583 | res->server = server; |
| 2584 | } |
| 2585 | |
| 2586 | static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, |
| 2587 | struct inode *new_dir) |
| 2588 | { |
| 2589 | struct nfs_renameres *res = task->tk_msg.rpc_resp; |
| 2590 | |
| 2591 | if (!nfs4_sequence_done(task, &res->seq_res)) |
| 2592 | return 0; |
| 2593 | if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN) |
| 2594 | return 0; |
| 2595 | |
| 2596 | update_changeattr(old_dir, &res->old_cinfo); |
| 2597 | nfs_post_op_update_inode(old_dir, res->old_fattr); |
| 2598 | update_changeattr(new_dir, &res->new_cinfo); |
| 2599 | nfs_post_op_update_inode(new_dir, res->new_fattr); |
| 2600 | return 1; |
| 2601 | } |
| 2602 | |
| 2603 | static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, |
| 2604 | struct inode *new_dir, struct qstr *new_name) |
| 2605 | { |
| 2606 | struct nfs_server *server = NFS_SERVER(old_dir); |
| 2607 | struct nfs_renameargs arg = { |
| 2608 | .old_dir = NFS_FH(old_dir), |
| 2609 | .new_dir = NFS_FH(new_dir), |
| 2610 | .old_name = old_name, |
| 2611 | .new_name = new_name, |
| 2612 | .bitmask = server->attr_bitmask, |
| 2613 | }; |
| 2614 | struct nfs_renameres res = { |
| 2615 | .server = server, |
| 2616 | }; |
| 2617 | struct rpc_message msg = { |
| 2618 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME], |
| 2619 | .rpc_argp = &arg, |
| 2620 | .rpc_resp = &res, |
| 2621 | }; |
| 2622 | int status = -ENOMEM; |
| 2623 | |
| 2624 | res.old_fattr = nfs_alloc_fattr(); |
| 2625 | res.new_fattr = nfs_alloc_fattr(); |
| 2626 | if (res.old_fattr == NULL || res.new_fattr == NULL) |
| 2627 | goto out; |
| 2628 | |
| 2629 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
| 2630 | if (!status) { |
| 2631 | update_changeattr(old_dir, &res.old_cinfo); |
| 2632 | nfs_post_op_update_inode(old_dir, res.old_fattr); |
| 2633 | update_changeattr(new_dir, &res.new_cinfo); |
| 2634 | nfs_post_op_update_inode(new_dir, res.new_fattr); |
| 2635 | } |
| 2636 | out: |
| 2637 | nfs_free_fattr(res.new_fattr); |
| 2638 | nfs_free_fattr(res.old_fattr); |
| 2639 | return status; |
| 2640 | } |
| 2641 | |
| 2642 | static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, |
| 2643 | struct inode *new_dir, struct qstr *new_name) |
| 2644 | { |
| 2645 | struct nfs4_exception exception = { }; |
| 2646 | int err; |
| 2647 | do { |
| 2648 | err = nfs4_handle_exception(NFS_SERVER(old_dir), |
| 2649 | _nfs4_proc_rename(old_dir, old_name, |
| 2650 | new_dir, new_name), |
| 2651 | &exception); |
| 2652 | } while (exception.retry); |
| 2653 | return err; |
| 2654 | } |
| 2655 | |
| 2656 | static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) |
| 2657 | { |
| 2658 | struct nfs_server *server = NFS_SERVER(inode); |
| 2659 | struct nfs4_link_arg arg = { |
| 2660 | .fh = NFS_FH(inode), |
| 2661 | .dir_fh = NFS_FH(dir), |
| 2662 | .name = name, |
| 2663 | .bitmask = server->attr_bitmask, |
| 2664 | }; |
| 2665 | struct nfs4_link_res res = { |
| 2666 | .server = server, |
| 2667 | }; |
| 2668 | struct rpc_message msg = { |
| 2669 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], |
| 2670 | .rpc_argp = &arg, |
| 2671 | .rpc_resp = &res, |
| 2672 | }; |
| 2673 | int status = -ENOMEM; |
| 2674 | |
| 2675 | res.fattr = nfs_alloc_fattr(); |
| 2676 | res.dir_attr = nfs_alloc_fattr(); |
| 2677 | if (res.fattr == NULL || res.dir_attr == NULL) |
| 2678 | goto out; |
| 2679 | |
| 2680 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
| 2681 | if (!status) { |
| 2682 | update_changeattr(dir, &res.cinfo); |
| 2683 | nfs_post_op_update_inode(dir, res.dir_attr); |
| 2684 | nfs_post_op_update_inode(inode, res.fattr); |
| 2685 | } |
| 2686 | out: |
| 2687 | nfs_free_fattr(res.dir_attr); |
| 2688 | nfs_free_fattr(res.fattr); |
| 2689 | return status; |
| 2690 | } |
| 2691 | |
| 2692 | static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) |
| 2693 | { |
| 2694 | struct nfs4_exception exception = { }; |
| 2695 | int err; |
| 2696 | do { |
| 2697 | err = nfs4_handle_exception(NFS_SERVER(inode), |
| 2698 | _nfs4_proc_link(inode, dir, name), |
| 2699 | &exception); |
| 2700 | } while (exception.retry); |
| 2701 | return err; |
| 2702 | } |
| 2703 | |
| 2704 | struct nfs4_createdata { |
| 2705 | struct rpc_message msg; |
| 2706 | struct nfs4_create_arg arg; |
| 2707 | struct nfs4_create_res res; |
| 2708 | struct nfs_fh fh; |
| 2709 | struct nfs_fattr fattr; |
| 2710 | struct nfs_fattr dir_fattr; |
| 2711 | }; |
| 2712 | |
| 2713 | static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, |
| 2714 | struct qstr *name, struct iattr *sattr, u32 ftype) |
| 2715 | { |
| 2716 | struct nfs4_createdata *data; |
| 2717 | |
| 2718 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
| 2719 | if (data != NULL) { |
| 2720 | struct nfs_server *server = NFS_SERVER(dir); |
| 2721 | |
| 2722 | data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; |
| 2723 | data->msg.rpc_argp = &data->arg; |
| 2724 | data->msg.rpc_resp = &data->res; |
| 2725 | data->arg.dir_fh = NFS_FH(dir); |
| 2726 | data->arg.server = server; |
| 2727 | data->arg.name = name; |
| 2728 | data->arg.attrs = sattr; |
| 2729 | data->arg.ftype = ftype; |
| 2730 | data->arg.bitmask = server->attr_bitmask; |
| 2731 | data->res.server = server; |
| 2732 | data->res.fh = &data->fh; |
| 2733 | data->res.fattr = &data->fattr; |
| 2734 | data->res.dir_fattr = &data->dir_fattr; |
| 2735 | nfs_fattr_init(data->res.fattr); |
| 2736 | nfs_fattr_init(data->res.dir_fattr); |
| 2737 | } |
| 2738 | return data; |
| 2739 | } |
| 2740 | |
| 2741 | static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) |
| 2742 | { |
| 2743 | int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg, |
| 2744 | &data->arg, &data->res, 1); |
| 2745 | if (status == 0) { |
| 2746 | update_changeattr(dir, &data->res.dir_cinfo); |
| 2747 | nfs_post_op_update_inode(dir, data->res.dir_fattr); |
| 2748 | status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); |
| 2749 | } |
| 2750 | return status; |
| 2751 | } |
| 2752 | |
| 2753 | static void nfs4_free_createdata(struct nfs4_createdata *data) |
| 2754 | { |
| 2755 | kfree(data); |
| 2756 | } |
| 2757 | |
| 2758 | static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
| 2759 | struct page *page, unsigned int len, struct iattr *sattr) |
| 2760 | { |
| 2761 | struct nfs4_createdata *data; |
| 2762 | int status = -ENAMETOOLONG; |
| 2763 | |
| 2764 | if (len > NFS4_MAXPATHLEN) |
| 2765 | goto out; |
| 2766 | |
| 2767 | status = -ENOMEM; |
| 2768 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); |
| 2769 | if (data == NULL) |
| 2770 | goto out; |
| 2771 | |
| 2772 | data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; |
| 2773 | data->arg.u.symlink.pages = &page; |
| 2774 | data->arg.u.symlink.len = len; |
| 2775 | |
| 2776 | status = nfs4_do_create(dir, dentry, data); |
| 2777 | |
| 2778 | nfs4_free_createdata(data); |
| 2779 | out: |
| 2780 | return status; |
| 2781 | } |
| 2782 | |
| 2783 | static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
| 2784 | struct page *page, unsigned int len, struct iattr *sattr) |
| 2785 | { |
| 2786 | struct nfs4_exception exception = { }; |
| 2787 | int err; |
| 2788 | do { |
| 2789 | err = nfs4_handle_exception(NFS_SERVER(dir), |
| 2790 | _nfs4_proc_symlink(dir, dentry, page, |
| 2791 | len, sattr), |
| 2792 | &exception); |
| 2793 | } while (exception.retry); |
| 2794 | return err; |
| 2795 | } |
| 2796 | |
| 2797 | static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, |
| 2798 | struct iattr *sattr) |
| 2799 | { |
| 2800 | struct nfs4_createdata *data; |
| 2801 | int status = -ENOMEM; |
| 2802 | |
| 2803 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); |
| 2804 | if (data == NULL) |
| 2805 | goto out; |
| 2806 | |
| 2807 | status = nfs4_do_create(dir, dentry, data); |
| 2808 | |
| 2809 | nfs4_free_createdata(data); |
| 2810 | out: |
| 2811 | return status; |
| 2812 | } |
| 2813 | |
| 2814 | static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, |
| 2815 | struct iattr *sattr) |
| 2816 | { |
| 2817 | struct nfs4_exception exception = { }; |
| 2818 | int err; |
| 2819 | do { |
| 2820 | err = nfs4_handle_exception(NFS_SERVER(dir), |
| 2821 | _nfs4_proc_mkdir(dir, dentry, sattr), |
| 2822 | &exception); |
| 2823 | } while (exception.retry); |
| 2824 | return err; |
| 2825 | } |
| 2826 | |
| 2827 | static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, |
| 2828 | u64 cookie, struct page **pages, unsigned int count, int plus) |
| 2829 | { |
| 2830 | struct inode *dir = dentry->d_inode; |
| 2831 | struct nfs4_readdir_arg args = { |
| 2832 | .fh = NFS_FH(dir), |
| 2833 | .pages = pages, |
| 2834 | .pgbase = 0, |
| 2835 | .count = count, |
| 2836 | .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask, |
| 2837 | .plus = plus, |
| 2838 | }; |
| 2839 | struct nfs4_readdir_res res; |
| 2840 | struct rpc_message msg = { |
| 2841 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], |
| 2842 | .rpc_argp = &args, |
| 2843 | .rpc_resp = &res, |
| 2844 | .rpc_cred = cred, |
| 2845 | }; |
| 2846 | int status; |
| 2847 | |
| 2848 | dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__, |
| 2849 | dentry->d_parent->d_name.name, |
| 2850 | dentry->d_name.name, |
| 2851 | (unsigned long long)cookie); |
| 2852 | nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args); |
| 2853 | res.pgbase = args.pgbase; |
| 2854 | status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0); |
| 2855 | if (status >= 0) { |
| 2856 | memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE); |
| 2857 | status += args.pgbase; |
| 2858 | } |
| 2859 | |
| 2860 | nfs_invalidate_atime(dir); |
| 2861 | |
| 2862 | dprintk("%s: returns %d\n", __func__, status); |
| 2863 | return status; |
| 2864 | } |
| 2865 | |
| 2866 | static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, |
| 2867 | u64 cookie, struct page **pages, unsigned int count, int plus) |
| 2868 | { |
| 2869 | struct nfs4_exception exception = { }; |
| 2870 | int err; |
| 2871 | do { |
| 2872 | err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), |
| 2873 | _nfs4_proc_readdir(dentry, cred, cookie, |
| 2874 | pages, count, plus), |
| 2875 | &exception); |
| 2876 | } while (exception.retry); |
| 2877 | return err; |
| 2878 | } |
| 2879 | |
| 2880 | static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, |
| 2881 | struct iattr *sattr, dev_t rdev) |
| 2882 | { |
| 2883 | struct nfs4_createdata *data; |
| 2884 | int mode = sattr->ia_mode; |
| 2885 | int status = -ENOMEM; |
| 2886 | |
| 2887 | BUG_ON(!(sattr->ia_valid & ATTR_MODE)); |
| 2888 | BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode)); |
| 2889 | |
| 2890 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); |
| 2891 | if (data == NULL) |
| 2892 | goto out; |
| 2893 | |
| 2894 | if (S_ISFIFO(mode)) |
| 2895 | data->arg.ftype = NF4FIFO; |
| 2896 | else if (S_ISBLK(mode)) { |
| 2897 | data->arg.ftype = NF4BLK; |
| 2898 | data->arg.u.device.specdata1 = MAJOR(rdev); |
| 2899 | data->arg.u.device.specdata2 = MINOR(rdev); |
| 2900 | } |
| 2901 | else if (S_ISCHR(mode)) { |
| 2902 | data->arg.ftype = NF4CHR; |
| 2903 | data->arg.u.device.specdata1 = MAJOR(rdev); |
| 2904 | data->arg.u.device.specdata2 = MINOR(rdev); |
| 2905 | } |
| 2906 | |
| 2907 | status = nfs4_do_create(dir, dentry, data); |
| 2908 | |
| 2909 | nfs4_free_createdata(data); |
| 2910 | out: |
| 2911 | return status; |
| 2912 | } |
| 2913 | |
| 2914 | static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, |
| 2915 | struct iattr *sattr, dev_t rdev) |
| 2916 | { |
| 2917 | struct nfs4_exception exception = { }; |
| 2918 | int err; |
| 2919 | do { |
| 2920 | err = nfs4_handle_exception(NFS_SERVER(dir), |
| 2921 | _nfs4_proc_mknod(dir, dentry, sattr, rdev), |
| 2922 | &exception); |
| 2923 | } while (exception.retry); |
| 2924 | return err; |
| 2925 | } |
| 2926 | |
| 2927 | static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, |
| 2928 | struct nfs_fsstat *fsstat) |
| 2929 | { |
| 2930 | struct nfs4_statfs_arg args = { |
| 2931 | .fh = fhandle, |
| 2932 | .bitmask = server->attr_bitmask, |
| 2933 | }; |
| 2934 | struct nfs4_statfs_res res = { |
| 2935 | .fsstat = fsstat, |
| 2936 | }; |
| 2937 | struct rpc_message msg = { |
| 2938 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], |
| 2939 | .rpc_argp = &args, |
| 2940 | .rpc_resp = &res, |
| 2941 | }; |
| 2942 | |
| 2943 | nfs_fattr_init(fsstat->fattr); |
| 2944 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
| 2945 | } |
| 2946 | |
| 2947 | static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) |
| 2948 | { |
| 2949 | struct nfs4_exception exception = { }; |
| 2950 | int err; |
| 2951 | do { |
| 2952 | err = nfs4_handle_exception(server, |
| 2953 | _nfs4_proc_statfs(server, fhandle, fsstat), |
| 2954 | &exception); |
| 2955 | } while (exception.retry); |
| 2956 | return err; |
| 2957 | } |
| 2958 | |
| 2959 | static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, |
| 2960 | struct nfs_fsinfo *fsinfo) |
| 2961 | { |
| 2962 | struct nfs4_fsinfo_arg args = { |
| 2963 | .fh = fhandle, |
| 2964 | .bitmask = server->attr_bitmask, |
| 2965 | }; |
| 2966 | struct nfs4_fsinfo_res res = { |
| 2967 | .fsinfo = fsinfo, |
| 2968 | }; |
| 2969 | struct rpc_message msg = { |
| 2970 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], |
| 2971 | .rpc_argp = &args, |
| 2972 | .rpc_resp = &res, |
| 2973 | }; |
| 2974 | |
| 2975 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
| 2976 | } |
| 2977 | |
| 2978 | static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) |
| 2979 | { |
| 2980 | struct nfs4_exception exception = { }; |
| 2981 | int err; |
| 2982 | |
| 2983 | do { |
| 2984 | err = nfs4_handle_exception(server, |
| 2985 | _nfs4_do_fsinfo(server, fhandle, fsinfo), |
| 2986 | &exception); |
| 2987 | } while (exception.retry); |
| 2988 | return err; |
| 2989 | } |
| 2990 | |
| 2991 | static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) |
| 2992 | { |
| 2993 | nfs_fattr_init(fsinfo->fattr); |
| 2994 | return nfs4_do_fsinfo(server, fhandle, fsinfo); |
| 2995 | } |
| 2996 | |
| 2997 | static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, |
| 2998 | struct nfs_pathconf *pathconf) |
| 2999 | { |
| 3000 | struct nfs4_pathconf_arg args = { |
| 3001 | .fh = fhandle, |
| 3002 | .bitmask = server->attr_bitmask, |
| 3003 | }; |
| 3004 | struct nfs4_pathconf_res res = { |
| 3005 | .pathconf = pathconf, |
| 3006 | }; |
| 3007 | struct rpc_message msg = { |
| 3008 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], |
| 3009 | .rpc_argp = &args, |
| 3010 | .rpc_resp = &res, |
| 3011 | }; |
| 3012 | |
| 3013 | /* None of the pathconf attributes are mandatory to implement */ |
| 3014 | if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { |
| 3015 | memset(pathconf, 0, sizeof(*pathconf)); |
| 3016 | return 0; |
| 3017 | } |
| 3018 | |
| 3019 | nfs_fattr_init(pathconf->fattr); |
| 3020 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
| 3021 | } |
| 3022 | |
| 3023 | static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, |
| 3024 | struct nfs_pathconf *pathconf) |
| 3025 | { |
| 3026 | struct nfs4_exception exception = { }; |
| 3027 | int err; |
| 3028 | |
| 3029 | do { |
| 3030 | err = nfs4_handle_exception(server, |
| 3031 | _nfs4_proc_pathconf(server, fhandle, pathconf), |
| 3032 | &exception); |
| 3033 | } while (exception.retry); |
| 3034 | return err; |
| 3035 | } |
| 3036 | |
| 3037 | static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data) |
| 3038 | { |
| 3039 | struct nfs_server *server = NFS_SERVER(data->inode); |
| 3040 | |
| 3041 | dprintk("--> %s\n", __func__); |
| 3042 | |
| 3043 | if (!nfs4_sequence_done(task, &data->res.seq_res)) |
| 3044 | return -EAGAIN; |
| 3045 | |
| 3046 | if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) { |
| 3047 | nfs_restart_rpc(task, server->nfs_client); |
| 3048 | return -EAGAIN; |
| 3049 | } |
| 3050 | |
| 3051 | nfs_invalidate_atime(data->inode); |
| 3052 | if (task->tk_status > 0) |
| 3053 | renew_lease(server, data->timestamp); |
| 3054 | return 0; |
| 3055 | } |
| 3056 | |
| 3057 | static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) |
| 3058 | { |
| 3059 | data->timestamp = jiffies; |
| 3060 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; |
| 3061 | } |
| 3062 | |
| 3063 | static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data) |
| 3064 | { |
| 3065 | struct inode *inode = data->inode; |
| 3066 | |
| 3067 | if (!nfs4_sequence_done(task, &data->res.seq_res)) |
| 3068 | return -EAGAIN; |
| 3069 | |
| 3070 | if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) { |
| 3071 | nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client); |
| 3072 | return -EAGAIN; |
| 3073 | } |
| 3074 | if (task->tk_status >= 0) { |
| 3075 | renew_lease(NFS_SERVER(inode), data->timestamp); |
| 3076 | nfs_post_op_update_inode_force_wcc(inode, data->res.fattr); |
| 3077 | } |
| 3078 | return 0; |
| 3079 | } |
| 3080 | |
| 3081 | static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) |
| 3082 | { |
| 3083 | struct nfs_server *server = NFS_SERVER(data->inode); |
| 3084 | |
| 3085 | data->args.bitmask = server->cache_consistency_bitmask; |
| 3086 | data->res.server = server; |
| 3087 | data->timestamp = jiffies; |
| 3088 | |
| 3089 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; |
| 3090 | } |
| 3091 | |
| 3092 | static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data) |
| 3093 | { |
| 3094 | struct inode *inode = data->inode; |
| 3095 | |
| 3096 | if (!nfs4_sequence_done(task, &data->res.seq_res)) |
| 3097 | return -EAGAIN; |
| 3098 | |
| 3099 | if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) { |
| 3100 | nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client); |
| 3101 | return -EAGAIN; |
| 3102 | } |
| 3103 | nfs_refresh_inode(inode, data->res.fattr); |
| 3104 | return 0; |
| 3105 | } |
| 3106 | |
| 3107 | static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg) |
| 3108 | { |
| 3109 | struct nfs_server *server = NFS_SERVER(data->inode); |
| 3110 | |
| 3111 | data->args.bitmask = server->cache_consistency_bitmask; |
| 3112 | data->res.server = server; |
| 3113 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; |
| 3114 | } |
| 3115 | |
| 3116 | struct nfs4_renewdata { |
| 3117 | struct nfs_client *client; |
| 3118 | unsigned long timestamp; |
| 3119 | }; |
| 3120 | |
| 3121 | /* |
| 3122 | * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special |
| 3123 | * standalone procedure for queueing an asynchronous RENEW. |
| 3124 | */ |
| 3125 | static void nfs4_renew_release(void *calldata) |
| 3126 | { |
| 3127 | struct nfs4_renewdata *data = calldata; |
| 3128 | struct nfs_client *clp = data->client; |
| 3129 | |
| 3130 | if (atomic_read(&clp->cl_count) > 1) |
| 3131 | nfs4_schedule_state_renewal(clp); |
| 3132 | nfs_put_client(clp); |
| 3133 | kfree(data); |
| 3134 | } |
| 3135 | |
| 3136 | static void nfs4_renew_done(struct rpc_task *task, void *calldata) |
| 3137 | { |
| 3138 | struct nfs4_renewdata *data = calldata; |
| 3139 | struct nfs_client *clp = data->client; |
| 3140 | unsigned long timestamp = data->timestamp; |
| 3141 | |
| 3142 | if (task->tk_status < 0) { |
| 3143 | /* Unless we're shutting down, schedule state recovery! */ |
| 3144 | if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0) |
| 3145 | nfs4_schedule_state_recovery(clp); |
| 3146 | return; |
| 3147 | } |
| 3148 | do_renew_lease(clp, timestamp); |
| 3149 | } |
| 3150 | |
| 3151 | static const struct rpc_call_ops nfs4_renew_ops = { |
| 3152 | .rpc_call_done = nfs4_renew_done, |
| 3153 | .rpc_release = nfs4_renew_release, |
| 3154 | }; |
| 3155 | |
| 3156 | int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred) |
| 3157 | { |
| 3158 | struct rpc_message msg = { |
| 3159 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], |
| 3160 | .rpc_argp = clp, |
| 3161 | .rpc_cred = cred, |
| 3162 | }; |
| 3163 | struct nfs4_renewdata *data; |
| 3164 | |
| 3165 | if (!atomic_inc_not_zero(&clp->cl_count)) |
| 3166 | return -EIO; |
| 3167 | data = kmalloc(sizeof(*data), GFP_KERNEL); |
| 3168 | if (data == NULL) |
| 3169 | return -ENOMEM; |
| 3170 | data->client = clp; |
| 3171 | data->timestamp = jiffies; |
| 3172 | return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, |
| 3173 | &nfs4_renew_ops, data); |
| 3174 | } |
| 3175 | |
| 3176 | int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred) |
| 3177 | { |
| 3178 | struct rpc_message msg = { |
| 3179 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], |
| 3180 | .rpc_argp = clp, |
| 3181 | .rpc_cred = cred, |
| 3182 | }; |
| 3183 | unsigned long now = jiffies; |
| 3184 | int status; |
| 3185 | |
| 3186 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); |
| 3187 | if (status < 0) |
| 3188 | return status; |
| 3189 | do_renew_lease(clp, now); |
| 3190 | return 0; |
| 3191 | } |
| 3192 | |
| 3193 | static inline int nfs4_server_supports_acls(struct nfs_server *server) |
| 3194 | { |
| 3195 | return (server->caps & NFS_CAP_ACLS) |
| 3196 | && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) |
| 3197 | && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL); |
| 3198 | } |
| 3199 | |
| 3200 | /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that |
| 3201 | * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on |
| 3202 | * the stack. |
| 3203 | */ |
| 3204 | #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT) |
| 3205 | |
| 3206 | static void buf_to_pages(const void *buf, size_t buflen, |
| 3207 | struct page **pages, unsigned int *pgbase) |
| 3208 | { |
| 3209 | const void *p = buf; |
| 3210 | |
| 3211 | *pgbase = offset_in_page(buf); |
| 3212 | p -= *pgbase; |
| 3213 | while (p < buf + buflen) { |
| 3214 | *(pages++) = virt_to_page(p); |
| 3215 | p += PAGE_CACHE_SIZE; |
| 3216 | } |
| 3217 | } |
| 3218 | |
| 3219 | struct nfs4_cached_acl { |
| 3220 | int cached; |
| 3221 | size_t len; |
| 3222 | char data[0]; |
| 3223 | }; |
| 3224 | |
| 3225 | static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) |
| 3226 | { |
| 3227 | struct nfs_inode *nfsi = NFS_I(inode); |
| 3228 | |
| 3229 | spin_lock(&inode->i_lock); |
| 3230 | kfree(nfsi->nfs4_acl); |
| 3231 | nfsi->nfs4_acl = acl; |
| 3232 | spin_unlock(&inode->i_lock); |
| 3233 | } |
| 3234 | |
| 3235 | static void nfs4_zap_acl_attr(struct inode *inode) |
| 3236 | { |
| 3237 | nfs4_set_cached_acl(inode, NULL); |
| 3238 | } |
| 3239 | |
| 3240 | static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) |
| 3241 | { |
| 3242 | struct nfs_inode *nfsi = NFS_I(inode); |
| 3243 | struct nfs4_cached_acl *acl; |
| 3244 | int ret = -ENOENT; |
| 3245 | |
| 3246 | spin_lock(&inode->i_lock); |
| 3247 | acl = nfsi->nfs4_acl; |
| 3248 | if (acl == NULL) |
| 3249 | goto out; |
| 3250 | if (buf == NULL) /* user is just asking for length */ |
| 3251 | goto out_len; |
| 3252 | if (acl->cached == 0) |
| 3253 | goto out; |
| 3254 | ret = -ERANGE; /* see getxattr(2) man page */ |
| 3255 | if (acl->len > buflen) |
| 3256 | goto out; |
| 3257 | memcpy(buf, acl->data, acl->len); |
| 3258 | out_len: |
| 3259 | ret = acl->len; |
| 3260 | out: |
| 3261 | spin_unlock(&inode->i_lock); |
| 3262 | return ret; |
| 3263 | } |
| 3264 | |
| 3265 | static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len) |
| 3266 | { |
| 3267 | struct nfs4_cached_acl *acl; |
| 3268 | |
| 3269 | if (buf && acl_len <= PAGE_SIZE) { |
| 3270 | acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL); |
| 3271 | if (acl == NULL) |
| 3272 | goto out; |
| 3273 | acl->cached = 1; |
| 3274 | memcpy(acl->data, buf, acl_len); |
| 3275 | } else { |
| 3276 | acl = kmalloc(sizeof(*acl), GFP_KERNEL); |
| 3277 | if (acl == NULL) |
| 3278 | goto out; |
| 3279 | acl->cached = 0; |
| 3280 | } |
| 3281 | acl->len = acl_len; |
| 3282 | out: |
| 3283 | nfs4_set_cached_acl(inode, acl); |
| 3284 | } |
| 3285 | |
| 3286 | static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
| 3287 | { |
| 3288 | struct page *pages[NFS4ACL_MAXPAGES]; |
| 3289 | struct nfs_getaclargs args = { |
| 3290 | .fh = NFS_FH(inode), |
| 3291 | .acl_pages = pages, |
| 3292 | .acl_len = buflen, |
| 3293 | }; |
| 3294 | struct nfs_getaclres res = { |
| 3295 | .acl_len = buflen, |
| 3296 | }; |
| 3297 | void *resp_buf; |
| 3298 | struct rpc_message msg = { |
| 3299 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], |
| 3300 | .rpc_argp = &args, |
| 3301 | .rpc_resp = &res, |
| 3302 | }; |
| 3303 | struct page *localpage = NULL; |
| 3304 | int ret; |
| 3305 | |
| 3306 | if (buflen < PAGE_SIZE) { |
| 3307 | /* As long as we're doing a round trip to the server anyway, |
| 3308 | * let's be prepared for a page of acl data. */ |
| 3309 | localpage = alloc_page(GFP_KERNEL); |
| 3310 | resp_buf = page_address(localpage); |
| 3311 | if (localpage == NULL) |
| 3312 | return -ENOMEM; |
| 3313 | args.acl_pages[0] = localpage; |
| 3314 | args.acl_pgbase = 0; |
| 3315 | args.acl_len = PAGE_SIZE; |
| 3316 | } else { |
| 3317 | resp_buf = buf; |
| 3318 | buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase); |
| 3319 | } |
| 3320 | ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0); |
| 3321 | if (ret) |
| 3322 | goto out_free; |
| 3323 | if (res.acl_len > args.acl_len) |
| 3324 | nfs4_write_cached_acl(inode, NULL, res.acl_len); |
| 3325 | else |
| 3326 | nfs4_write_cached_acl(inode, resp_buf, res.acl_len); |
| 3327 | if (buf) { |
| 3328 | ret = -ERANGE; |
| 3329 | if (res.acl_len > buflen) |
| 3330 | goto out_free; |
| 3331 | if (localpage) |
| 3332 | memcpy(buf, resp_buf, res.acl_len); |
| 3333 | } |
| 3334 | ret = res.acl_len; |
| 3335 | out_free: |
| 3336 | if (localpage) |
| 3337 | __free_page(localpage); |
| 3338 | return ret; |
| 3339 | } |
| 3340 | |
| 3341 | static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
| 3342 | { |
| 3343 | struct nfs4_exception exception = { }; |
| 3344 | ssize_t ret; |
| 3345 | do { |
| 3346 | ret = __nfs4_get_acl_uncached(inode, buf, buflen); |
| 3347 | if (ret >= 0) |
| 3348 | break; |
| 3349 | ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); |
| 3350 | } while (exception.retry); |
| 3351 | return ret; |
| 3352 | } |
| 3353 | |
| 3354 | static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) |
| 3355 | { |
| 3356 | struct nfs_server *server = NFS_SERVER(inode); |
| 3357 | int ret; |
| 3358 | |
| 3359 | if (!nfs4_server_supports_acls(server)) |
| 3360 | return -EOPNOTSUPP; |
| 3361 | ret = nfs_revalidate_inode(server, inode); |
| 3362 | if (ret < 0) |
| 3363 | return ret; |
| 3364 | if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) |
| 3365 | nfs_zap_acl_cache(inode); |
| 3366 | ret = nfs4_read_cached_acl(inode, buf, buflen); |
| 3367 | if (ret != -ENOENT) |
| 3368 | return ret; |
| 3369 | return nfs4_get_acl_uncached(inode, buf, buflen); |
| 3370 | } |
| 3371 | |
| 3372 | static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
| 3373 | { |
| 3374 | struct nfs_server *server = NFS_SERVER(inode); |
| 3375 | struct page *pages[NFS4ACL_MAXPAGES]; |
| 3376 | struct nfs_setaclargs arg = { |
| 3377 | .fh = NFS_FH(inode), |
| 3378 | .acl_pages = pages, |
| 3379 | .acl_len = buflen, |
| 3380 | }; |
| 3381 | struct nfs_setaclres res; |
| 3382 | struct rpc_message msg = { |
| 3383 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], |
| 3384 | .rpc_argp = &arg, |
| 3385 | .rpc_resp = &res, |
| 3386 | }; |
| 3387 | int ret; |
| 3388 | |
| 3389 | if (!nfs4_server_supports_acls(server)) |
| 3390 | return -EOPNOTSUPP; |
| 3391 | nfs_inode_return_delegation(inode); |
| 3392 | buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase); |
| 3393 | ret = nfs4_call_sync(server, &msg, &arg, &res, 1); |
| 3394 | /* |
| 3395 | * Acl update can result in inode attribute update. |
| 3396 | * so mark the attribute cache invalid. |
| 3397 | */ |
| 3398 | spin_lock(&inode->i_lock); |
| 3399 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR; |
| 3400 | spin_unlock(&inode->i_lock); |
| 3401 | nfs_access_zap_cache(inode); |
| 3402 | nfs_zap_acl_cache(inode); |
| 3403 | return ret; |
| 3404 | } |
| 3405 | |
| 3406 | static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
| 3407 | { |
| 3408 | struct nfs4_exception exception = { }; |
| 3409 | int err; |
| 3410 | do { |
| 3411 | err = nfs4_handle_exception(NFS_SERVER(inode), |
| 3412 | __nfs4_proc_set_acl(inode, buf, buflen), |
| 3413 | &exception); |
| 3414 | } while (exception.retry); |
| 3415 | return err; |
| 3416 | } |
| 3417 | |
| 3418 | static int |
| 3419 | nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state) |
| 3420 | { |
| 3421 | struct nfs_client *clp = server->nfs_client; |
| 3422 | |
| 3423 | if (task->tk_status >= 0) |
| 3424 | return 0; |
| 3425 | switch(task->tk_status) { |
| 3426 | case -NFS4ERR_ADMIN_REVOKED: |
| 3427 | case -NFS4ERR_BAD_STATEID: |
| 3428 | case -NFS4ERR_OPENMODE: |
| 3429 | if (state == NULL) |
| 3430 | break; |
| 3431 | nfs4_state_mark_reclaim_nograce(clp, state); |
| 3432 | goto do_state_recovery; |
| 3433 | case -NFS4ERR_STALE_STATEID: |
| 3434 | case -NFS4ERR_STALE_CLIENTID: |
| 3435 | case -NFS4ERR_EXPIRED: |
| 3436 | goto do_state_recovery; |
| 3437 | #if defined(CONFIG_NFS_V4_1) |
| 3438 | case -NFS4ERR_BADSESSION: |
| 3439 | case -NFS4ERR_BADSLOT: |
| 3440 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 3441 | case -NFS4ERR_DEADSESSION: |
| 3442 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
| 3443 | case -NFS4ERR_SEQ_FALSE_RETRY: |
| 3444 | case -NFS4ERR_SEQ_MISORDERED: |
| 3445 | dprintk("%s ERROR %d, Reset session\n", __func__, |
| 3446 | task->tk_status); |
| 3447 | nfs4_schedule_state_recovery(clp); |
| 3448 | task->tk_status = 0; |
| 3449 | return -EAGAIN; |
| 3450 | #endif /* CONFIG_NFS_V4_1 */ |
| 3451 | case -NFS4ERR_DELAY: |
| 3452 | nfs_inc_server_stats(server, NFSIOS_DELAY); |
| 3453 | case -NFS4ERR_GRACE: |
| 3454 | case -EKEYEXPIRED: |
| 3455 | rpc_delay(task, NFS4_POLL_RETRY_MAX); |
| 3456 | task->tk_status = 0; |
| 3457 | return -EAGAIN; |
| 3458 | case -NFS4ERR_OLD_STATEID: |
| 3459 | task->tk_status = 0; |
| 3460 | return -EAGAIN; |
| 3461 | } |
| 3462 | task->tk_status = nfs4_map_errors(task->tk_status); |
| 3463 | return 0; |
| 3464 | do_state_recovery: |
| 3465 | rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); |
| 3466 | nfs4_schedule_state_recovery(clp); |
| 3467 | if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) |
| 3468 | rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); |
| 3469 | task->tk_status = 0; |
| 3470 | return -EAGAIN; |
| 3471 | } |
| 3472 | |
| 3473 | int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, |
| 3474 | unsigned short port, struct rpc_cred *cred, |
| 3475 | struct nfs4_setclientid_res *res) |
| 3476 | { |
| 3477 | nfs4_verifier sc_verifier; |
| 3478 | struct nfs4_setclientid setclientid = { |
| 3479 | .sc_verifier = &sc_verifier, |
| 3480 | .sc_prog = program, |
| 3481 | }; |
| 3482 | struct rpc_message msg = { |
| 3483 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], |
| 3484 | .rpc_argp = &setclientid, |
| 3485 | .rpc_resp = res, |
| 3486 | .rpc_cred = cred, |
| 3487 | }; |
| 3488 | __be32 *p; |
| 3489 | int loop = 0; |
| 3490 | int status; |
| 3491 | |
| 3492 | p = (__be32*)sc_verifier.data; |
| 3493 | *p++ = htonl((u32)clp->cl_boot_time.tv_sec); |
| 3494 | *p = htonl((u32)clp->cl_boot_time.tv_nsec); |
| 3495 | |
| 3496 | for(;;) { |
| 3497 | setclientid.sc_name_len = scnprintf(setclientid.sc_name, |
| 3498 | sizeof(setclientid.sc_name), "%s/%s %s %s %u", |
| 3499 | clp->cl_ipaddr, |
| 3500 | rpc_peeraddr2str(clp->cl_rpcclient, |
| 3501 | RPC_DISPLAY_ADDR), |
| 3502 | rpc_peeraddr2str(clp->cl_rpcclient, |
| 3503 | RPC_DISPLAY_PROTO), |
| 3504 | clp->cl_rpcclient->cl_auth->au_ops->au_name, |
| 3505 | clp->cl_id_uniquifier); |
| 3506 | setclientid.sc_netid_len = scnprintf(setclientid.sc_netid, |
| 3507 | sizeof(setclientid.sc_netid), |
| 3508 | rpc_peeraddr2str(clp->cl_rpcclient, |
| 3509 | RPC_DISPLAY_NETID)); |
| 3510 | setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, |
| 3511 | sizeof(setclientid.sc_uaddr), "%s.%u.%u", |
| 3512 | clp->cl_ipaddr, port >> 8, port & 255); |
| 3513 | |
| 3514 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); |
| 3515 | if (status != -NFS4ERR_CLID_INUSE) |
| 3516 | break; |
| 3517 | if (signalled()) |
| 3518 | break; |
| 3519 | if (loop++ & 1) |
| 3520 | ssleep(clp->cl_lease_time + 1); |
| 3521 | else |
| 3522 | if (++clp->cl_id_uniquifier == 0) |
| 3523 | break; |
| 3524 | } |
| 3525 | return status; |
| 3526 | } |
| 3527 | |
| 3528 | static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, |
| 3529 | struct nfs4_setclientid_res *arg, |
| 3530 | struct rpc_cred *cred) |
| 3531 | { |
| 3532 | struct nfs_fsinfo fsinfo; |
| 3533 | struct rpc_message msg = { |
| 3534 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], |
| 3535 | .rpc_argp = arg, |
| 3536 | .rpc_resp = &fsinfo, |
| 3537 | .rpc_cred = cred, |
| 3538 | }; |
| 3539 | unsigned long now; |
| 3540 | int status; |
| 3541 | |
| 3542 | now = jiffies; |
| 3543 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); |
| 3544 | if (status == 0) { |
| 3545 | spin_lock(&clp->cl_lock); |
| 3546 | clp->cl_lease_time = fsinfo.lease_time * HZ; |
| 3547 | clp->cl_last_renewal = now; |
| 3548 | spin_unlock(&clp->cl_lock); |
| 3549 | } |
| 3550 | return status; |
| 3551 | } |
| 3552 | |
| 3553 | int nfs4_proc_setclientid_confirm(struct nfs_client *clp, |
| 3554 | struct nfs4_setclientid_res *arg, |
| 3555 | struct rpc_cred *cred) |
| 3556 | { |
| 3557 | long timeout = 0; |
| 3558 | int err; |
| 3559 | do { |
| 3560 | err = _nfs4_proc_setclientid_confirm(clp, arg, cred); |
| 3561 | switch (err) { |
| 3562 | case 0: |
| 3563 | return err; |
| 3564 | case -NFS4ERR_RESOURCE: |
| 3565 | /* The IBM lawyers misread another document! */ |
| 3566 | case -NFS4ERR_DELAY: |
| 3567 | err = nfs4_delay(clp->cl_rpcclient, &timeout); |
| 3568 | } |
| 3569 | } while (err == 0); |
| 3570 | return err; |
| 3571 | } |
| 3572 | |
| 3573 | struct nfs4_delegreturndata { |
| 3574 | struct nfs4_delegreturnargs args; |
| 3575 | struct nfs4_delegreturnres res; |
| 3576 | struct nfs_fh fh; |
| 3577 | nfs4_stateid stateid; |
| 3578 | unsigned long timestamp; |
| 3579 | struct nfs_fattr fattr; |
| 3580 | int rpc_status; |
| 3581 | }; |
| 3582 | |
| 3583 | static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) |
| 3584 | { |
| 3585 | struct nfs4_delegreturndata *data = calldata; |
| 3586 | |
| 3587 | if (!nfs4_sequence_done(task, &data->res.seq_res)) |
| 3588 | return; |
| 3589 | |
| 3590 | switch (task->tk_status) { |
| 3591 | case -NFS4ERR_STALE_STATEID: |
| 3592 | case -NFS4ERR_EXPIRED: |
| 3593 | case 0: |
| 3594 | renew_lease(data->res.server, data->timestamp); |
| 3595 | break; |
| 3596 | default: |
| 3597 | if (nfs4_async_handle_error(task, data->res.server, NULL) == |
| 3598 | -EAGAIN) { |
| 3599 | nfs_restart_rpc(task, data->res.server->nfs_client); |
| 3600 | return; |
| 3601 | } |
| 3602 | } |
| 3603 | data->rpc_status = task->tk_status; |
| 3604 | } |
| 3605 | |
| 3606 | static void nfs4_delegreturn_release(void *calldata) |
| 3607 | { |
| 3608 | kfree(calldata); |
| 3609 | } |
| 3610 | |
| 3611 | #if defined(CONFIG_NFS_V4_1) |
| 3612 | static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) |
| 3613 | { |
| 3614 | struct nfs4_delegreturndata *d_data; |
| 3615 | |
| 3616 | d_data = (struct nfs4_delegreturndata *)data; |
| 3617 | |
| 3618 | if (nfs4_setup_sequence(d_data->res.server, |
| 3619 | &d_data->args.seq_args, |
| 3620 | &d_data->res.seq_res, 1, task)) |
| 3621 | return; |
| 3622 | rpc_call_start(task); |
| 3623 | } |
| 3624 | #endif /* CONFIG_NFS_V4_1 */ |
| 3625 | |
| 3626 | static const struct rpc_call_ops nfs4_delegreturn_ops = { |
| 3627 | #if defined(CONFIG_NFS_V4_1) |
| 3628 | .rpc_call_prepare = nfs4_delegreturn_prepare, |
| 3629 | #endif /* CONFIG_NFS_V4_1 */ |
| 3630 | .rpc_call_done = nfs4_delegreturn_done, |
| 3631 | .rpc_release = nfs4_delegreturn_release, |
| 3632 | }; |
| 3633 | |
| 3634 | static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) |
| 3635 | { |
| 3636 | struct nfs4_delegreturndata *data; |
| 3637 | struct nfs_server *server = NFS_SERVER(inode); |
| 3638 | struct rpc_task *task; |
| 3639 | struct rpc_message msg = { |
| 3640 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], |
| 3641 | .rpc_cred = cred, |
| 3642 | }; |
| 3643 | struct rpc_task_setup task_setup_data = { |
| 3644 | .rpc_client = server->client, |
| 3645 | .rpc_message = &msg, |
| 3646 | .callback_ops = &nfs4_delegreturn_ops, |
| 3647 | .flags = RPC_TASK_ASYNC, |
| 3648 | }; |
| 3649 | int status = 0; |
| 3650 | |
| 3651 | data = kzalloc(sizeof(*data), GFP_NOFS); |
| 3652 | if (data == NULL) |
| 3653 | return -ENOMEM; |
| 3654 | data->args.fhandle = &data->fh; |
| 3655 | data->args.stateid = &data->stateid; |
| 3656 | data->args.bitmask = server->attr_bitmask; |
| 3657 | nfs_copy_fh(&data->fh, NFS_FH(inode)); |
| 3658 | memcpy(&data->stateid, stateid, sizeof(data->stateid)); |
| 3659 | data->res.fattr = &data->fattr; |
| 3660 | data->res.server = server; |
| 3661 | nfs_fattr_init(data->res.fattr); |
| 3662 | data->timestamp = jiffies; |
| 3663 | data->rpc_status = 0; |
| 3664 | |
| 3665 | task_setup_data.callback_data = data; |
| 3666 | msg.rpc_argp = &data->args, |
| 3667 | msg.rpc_resp = &data->res, |
| 3668 | task = rpc_run_task(&task_setup_data); |
| 3669 | if (IS_ERR(task)) |
| 3670 | return PTR_ERR(task); |
| 3671 | if (!issync) |
| 3672 | goto out; |
| 3673 | status = nfs4_wait_for_completion_rpc_task(task); |
| 3674 | if (status != 0) |
| 3675 | goto out; |
| 3676 | status = data->rpc_status; |
| 3677 | if (status != 0) |
| 3678 | goto out; |
| 3679 | nfs_refresh_inode(inode, &data->fattr); |
| 3680 | out: |
| 3681 | rpc_put_task(task); |
| 3682 | return status; |
| 3683 | } |
| 3684 | |
| 3685 | int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) |
| 3686 | { |
| 3687 | struct nfs_server *server = NFS_SERVER(inode); |
| 3688 | struct nfs4_exception exception = { }; |
| 3689 | int err; |
| 3690 | do { |
| 3691 | err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); |
| 3692 | switch (err) { |
| 3693 | case -NFS4ERR_STALE_STATEID: |
| 3694 | case -NFS4ERR_EXPIRED: |
| 3695 | case 0: |
| 3696 | return 0; |
| 3697 | } |
| 3698 | err = nfs4_handle_exception(server, err, &exception); |
| 3699 | } while (exception.retry); |
| 3700 | return err; |
| 3701 | } |
| 3702 | |
| 3703 | #define NFS4_LOCK_MINTIMEOUT (1 * HZ) |
| 3704 | #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) |
| 3705 | |
| 3706 | /* |
| 3707 | * sleep, with exponential backoff, and retry the LOCK operation. |
| 3708 | */ |
| 3709 | static unsigned long |
| 3710 | nfs4_set_lock_task_retry(unsigned long timeout) |
| 3711 | { |
| 3712 | schedule_timeout_killable(timeout); |
| 3713 | timeout <<= 1; |
| 3714 | if (timeout > NFS4_LOCK_MAXTIMEOUT) |
| 3715 | return NFS4_LOCK_MAXTIMEOUT; |
| 3716 | return timeout; |
| 3717 | } |
| 3718 | |
| 3719 | static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
| 3720 | { |
| 3721 | struct inode *inode = state->inode; |
| 3722 | struct nfs_server *server = NFS_SERVER(inode); |
| 3723 | struct nfs_client *clp = server->nfs_client; |
| 3724 | struct nfs_lockt_args arg = { |
| 3725 | .fh = NFS_FH(inode), |
| 3726 | .fl = request, |
| 3727 | }; |
| 3728 | struct nfs_lockt_res res = { |
| 3729 | .denied = request, |
| 3730 | }; |
| 3731 | struct rpc_message msg = { |
| 3732 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], |
| 3733 | .rpc_argp = &arg, |
| 3734 | .rpc_resp = &res, |
| 3735 | .rpc_cred = state->owner->so_cred, |
| 3736 | }; |
| 3737 | struct nfs4_lock_state *lsp; |
| 3738 | int status; |
| 3739 | |
| 3740 | arg.lock_owner.clientid = clp->cl_clientid; |
| 3741 | status = nfs4_set_lock_state(state, request); |
| 3742 | if (status != 0) |
| 3743 | goto out; |
| 3744 | lsp = request->fl_u.nfs4_fl.owner; |
| 3745 | arg.lock_owner.id = lsp->ls_id.id; |
| 3746 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
| 3747 | switch (status) { |
| 3748 | case 0: |
| 3749 | request->fl_type = F_UNLCK; |
| 3750 | break; |
| 3751 | case -NFS4ERR_DENIED: |
| 3752 | status = 0; |
| 3753 | } |
| 3754 | request->fl_ops->fl_release_private(request); |
| 3755 | out: |
| 3756 | return status; |
| 3757 | } |
| 3758 | |
| 3759 | static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
| 3760 | { |
| 3761 | struct nfs4_exception exception = { }; |
| 3762 | int err; |
| 3763 | |
| 3764 | do { |
| 3765 | err = nfs4_handle_exception(NFS_SERVER(state->inode), |
| 3766 | _nfs4_proc_getlk(state, cmd, request), |
| 3767 | &exception); |
| 3768 | } while (exception.retry); |
| 3769 | return err; |
| 3770 | } |
| 3771 | |
| 3772 | static int do_vfs_lock(struct file *file, struct file_lock *fl) |
| 3773 | { |
| 3774 | int res = 0; |
| 3775 | switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { |
| 3776 | case FL_POSIX: |
| 3777 | res = posix_lock_file_wait(file, fl); |
| 3778 | break; |
| 3779 | case FL_FLOCK: |
| 3780 | res = flock_lock_file_wait(file, fl); |
| 3781 | break; |
| 3782 | default: |
| 3783 | BUG(); |
| 3784 | } |
| 3785 | return res; |
| 3786 | } |
| 3787 | |
| 3788 | struct nfs4_unlockdata { |
| 3789 | struct nfs_locku_args arg; |
| 3790 | struct nfs_locku_res res; |
| 3791 | struct nfs4_lock_state *lsp; |
| 3792 | struct nfs_open_context *ctx; |
| 3793 | struct file_lock fl; |
| 3794 | const struct nfs_server *server; |
| 3795 | unsigned long timestamp; |
| 3796 | }; |
| 3797 | |
| 3798 | static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, |
| 3799 | struct nfs_open_context *ctx, |
| 3800 | struct nfs4_lock_state *lsp, |
| 3801 | struct nfs_seqid *seqid) |
| 3802 | { |
| 3803 | struct nfs4_unlockdata *p; |
| 3804 | struct inode *inode = lsp->ls_state->inode; |
| 3805 | |
| 3806 | p = kzalloc(sizeof(*p), GFP_NOFS); |
| 3807 | if (p == NULL) |
| 3808 | return NULL; |
| 3809 | p->arg.fh = NFS_FH(inode); |
| 3810 | p->arg.fl = &p->fl; |
| 3811 | p->arg.seqid = seqid; |
| 3812 | p->res.seqid = seqid; |
| 3813 | p->arg.stateid = &lsp->ls_stateid; |
| 3814 | p->lsp = lsp; |
| 3815 | atomic_inc(&lsp->ls_count); |
| 3816 | /* Ensure we don't close file until we're done freeing locks! */ |
| 3817 | p->ctx = get_nfs_open_context(ctx); |
| 3818 | memcpy(&p->fl, fl, sizeof(p->fl)); |
| 3819 | p->server = NFS_SERVER(inode); |
| 3820 | return p; |
| 3821 | } |
| 3822 | |
| 3823 | static void nfs4_locku_release_calldata(void *data) |
| 3824 | { |
| 3825 | struct nfs4_unlockdata *calldata = data; |
| 3826 | nfs_free_seqid(calldata->arg.seqid); |
| 3827 | nfs4_put_lock_state(calldata->lsp); |
| 3828 | put_nfs_open_context(calldata->ctx); |
| 3829 | kfree(calldata); |
| 3830 | } |
| 3831 | |
| 3832 | static void nfs4_locku_done(struct rpc_task *task, void *data) |
| 3833 | { |
| 3834 | struct nfs4_unlockdata *calldata = data; |
| 3835 | |
| 3836 | if (!nfs4_sequence_done(task, &calldata->res.seq_res)) |
| 3837 | return; |
| 3838 | switch (task->tk_status) { |
| 3839 | case 0: |
| 3840 | memcpy(calldata->lsp->ls_stateid.data, |
| 3841 | calldata->res.stateid.data, |
| 3842 | sizeof(calldata->lsp->ls_stateid.data)); |
| 3843 | renew_lease(calldata->server, calldata->timestamp); |
| 3844 | break; |
| 3845 | case -NFS4ERR_BAD_STATEID: |
| 3846 | case -NFS4ERR_OLD_STATEID: |
| 3847 | case -NFS4ERR_STALE_STATEID: |
| 3848 | case -NFS4ERR_EXPIRED: |
| 3849 | break; |
| 3850 | default: |
| 3851 | if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN) |
| 3852 | nfs_restart_rpc(task, |
| 3853 | calldata->server->nfs_client); |
| 3854 | } |
| 3855 | } |
| 3856 | |
| 3857 | static void nfs4_locku_prepare(struct rpc_task *task, void *data) |
| 3858 | { |
| 3859 | struct nfs4_unlockdata *calldata = data; |
| 3860 | |
| 3861 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
| 3862 | return; |
| 3863 | if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) { |
| 3864 | /* Note: exit _without_ running nfs4_locku_done */ |
| 3865 | task->tk_action = NULL; |
| 3866 | return; |
| 3867 | } |
| 3868 | calldata->timestamp = jiffies; |
| 3869 | if (nfs4_setup_sequence(calldata->server, |
| 3870 | &calldata->arg.seq_args, |
| 3871 | &calldata->res.seq_res, 1, task)) |
| 3872 | return; |
| 3873 | rpc_call_start(task); |
| 3874 | } |
| 3875 | |
| 3876 | static const struct rpc_call_ops nfs4_locku_ops = { |
| 3877 | .rpc_call_prepare = nfs4_locku_prepare, |
| 3878 | .rpc_call_done = nfs4_locku_done, |
| 3879 | .rpc_release = nfs4_locku_release_calldata, |
| 3880 | }; |
| 3881 | |
| 3882 | static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, |
| 3883 | struct nfs_open_context *ctx, |
| 3884 | struct nfs4_lock_state *lsp, |
| 3885 | struct nfs_seqid *seqid) |
| 3886 | { |
| 3887 | struct nfs4_unlockdata *data; |
| 3888 | struct rpc_message msg = { |
| 3889 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], |
| 3890 | .rpc_cred = ctx->cred, |
| 3891 | }; |
| 3892 | struct rpc_task_setup task_setup_data = { |
| 3893 | .rpc_client = NFS_CLIENT(lsp->ls_state->inode), |
| 3894 | .rpc_message = &msg, |
| 3895 | .callback_ops = &nfs4_locku_ops, |
| 3896 | .workqueue = nfsiod_workqueue, |
| 3897 | .flags = RPC_TASK_ASYNC, |
| 3898 | }; |
| 3899 | |
| 3900 | /* Ensure this is an unlock - when canceling a lock, the |
| 3901 | * canceled lock is passed in, and it won't be an unlock. |
| 3902 | */ |
| 3903 | fl->fl_type = F_UNLCK; |
| 3904 | |
| 3905 | data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); |
| 3906 | if (data == NULL) { |
| 3907 | nfs_free_seqid(seqid); |
| 3908 | return ERR_PTR(-ENOMEM); |
| 3909 | } |
| 3910 | |
| 3911 | msg.rpc_argp = &data->arg, |
| 3912 | msg.rpc_resp = &data->res, |
| 3913 | task_setup_data.callback_data = data; |
| 3914 | return rpc_run_task(&task_setup_data); |
| 3915 | } |
| 3916 | |
| 3917 | static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) |
| 3918 | { |
| 3919 | struct nfs_inode *nfsi = NFS_I(state->inode); |
| 3920 | struct nfs_seqid *seqid; |
| 3921 | struct nfs4_lock_state *lsp; |
| 3922 | struct rpc_task *task; |
| 3923 | int status = 0; |
| 3924 | unsigned char fl_flags = request->fl_flags; |
| 3925 | |
| 3926 | status = nfs4_set_lock_state(state, request); |
| 3927 | /* Unlock _before_ we do the RPC call */ |
| 3928 | request->fl_flags |= FL_EXISTS; |
| 3929 | down_read(&nfsi->rwsem); |
| 3930 | if (do_vfs_lock(request->fl_file, request) == -ENOENT) { |
| 3931 | up_read(&nfsi->rwsem); |
| 3932 | goto out; |
| 3933 | } |
| 3934 | up_read(&nfsi->rwsem); |
| 3935 | if (status != 0) |
| 3936 | goto out; |
| 3937 | /* Is this a delegated lock? */ |
| 3938 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) |
| 3939 | goto out; |
| 3940 | lsp = request->fl_u.nfs4_fl.owner; |
| 3941 | seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); |
| 3942 | status = -ENOMEM; |
| 3943 | if (seqid == NULL) |
| 3944 | goto out; |
| 3945 | task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); |
| 3946 | status = PTR_ERR(task); |
| 3947 | if (IS_ERR(task)) |
| 3948 | goto out; |
| 3949 | status = nfs4_wait_for_completion_rpc_task(task); |
| 3950 | rpc_put_task(task); |
| 3951 | out: |
| 3952 | request->fl_flags = fl_flags; |
| 3953 | return status; |
| 3954 | } |
| 3955 | |
| 3956 | struct nfs4_lockdata { |
| 3957 | struct nfs_lock_args arg; |
| 3958 | struct nfs_lock_res res; |
| 3959 | struct nfs4_lock_state *lsp; |
| 3960 | struct nfs_open_context *ctx; |
| 3961 | struct file_lock fl; |
| 3962 | unsigned long timestamp; |
| 3963 | int rpc_status; |
| 3964 | int cancelled; |
| 3965 | struct nfs_server *server; |
| 3966 | }; |
| 3967 | |
| 3968 | static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, |
| 3969 | struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, |
| 3970 | gfp_t gfp_mask) |
| 3971 | { |
| 3972 | struct nfs4_lockdata *p; |
| 3973 | struct inode *inode = lsp->ls_state->inode; |
| 3974 | struct nfs_server *server = NFS_SERVER(inode); |
| 3975 | |
| 3976 | p = kzalloc(sizeof(*p), gfp_mask); |
| 3977 | if (p == NULL) |
| 3978 | return NULL; |
| 3979 | |
| 3980 | p->arg.fh = NFS_FH(inode); |
| 3981 | p->arg.fl = &p->fl; |
| 3982 | p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); |
| 3983 | if (p->arg.open_seqid == NULL) |
| 3984 | goto out_free; |
| 3985 | p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask); |
| 3986 | if (p->arg.lock_seqid == NULL) |
| 3987 | goto out_free_seqid; |
| 3988 | p->arg.lock_stateid = &lsp->ls_stateid; |
| 3989 | p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; |
| 3990 | p->arg.lock_owner.id = lsp->ls_id.id; |
| 3991 | p->res.lock_seqid = p->arg.lock_seqid; |
| 3992 | p->lsp = lsp; |
| 3993 | p->server = server; |
| 3994 | atomic_inc(&lsp->ls_count); |
| 3995 | p->ctx = get_nfs_open_context(ctx); |
| 3996 | memcpy(&p->fl, fl, sizeof(p->fl)); |
| 3997 | return p; |
| 3998 | out_free_seqid: |
| 3999 | nfs_free_seqid(p->arg.open_seqid); |
| 4000 | out_free: |
| 4001 | kfree(p); |
| 4002 | return NULL; |
| 4003 | } |
| 4004 | |
| 4005 | static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) |
| 4006 | { |
| 4007 | struct nfs4_lockdata *data = calldata; |
| 4008 | struct nfs4_state *state = data->lsp->ls_state; |
| 4009 | |
| 4010 | dprintk("%s: begin!\n", __func__); |
| 4011 | if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) |
| 4012 | return; |
| 4013 | /* Do we need to do an open_to_lock_owner? */ |
| 4014 | if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) { |
| 4015 | if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) |
| 4016 | return; |
| 4017 | data->arg.open_stateid = &state->stateid; |
| 4018 | data->arg.new_lock_owner = 1; |
| 4019 | data->res.open_seqid = data->arg.open_seqid; |
| 4020 | } else |
| 4021 | data->arg.new_lock_owner = 0; |
| 4022 | data->timestamp = jiffies; |
| 4023 | if (nfs4_setup_sequence(data->server, |
| 4024 | &data->arg.seq_args, |
| 4025 | &data->res.seq_res, 1, task)) |
| 4026 | return; |
| 4027 | rpc_call_start(task); |
| 4028 | dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); |
| 4029 | } |
| 4030 | |
| 4031 | static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata) |
| 4032 | { |
| 4033 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); |
| 4034 | nfs4_lock_prepare(task, calldata); |
| 4035 | } |
| 4036 | |
| 4037 | static void nfs4_lock_done(struct rpc_task *task, void *calldata) |
| 4038 | { |
| 4039 | struct nfs4_lockdata *data = calldata; |
| 4040 | |
| 4041 | dprintk("%s: begin!\n", __func__); |
| 4042 | |
| 4043 | if (!nfs4_sequence_done(task, &data->res.seq_res)) |
| 4044 | return; |
| 4045 | |
| 4046 | data->rpc_status = task->tk_status; |
| 4047 | if (data->arg.new_lock_owner != 0) { |
| 4048 | if (data->rpc_status == 0) |
| 4049 | nfs_confirm_seqid(&data->lsp->ls_seqid, 0); |
| 4050 | else |
| 4051 | goto out; |
| 4052 | } |
| 4053 | if (data->rpc_status == 0) { |
| 4054 | memcpy(data->lsp->ls_stateid.data, data->res.stateid.data, |
| 4055 | sizeof(data->lsp->ls_stateid.data)); |
| 4056 | data->lsp->ls_flags |= NFS_LOCK_INITIALIZED; |
| 4057 | renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp); |
| 4058 | } |
| 4059 | out: |
| 4060 | dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); |
| 4061 | } |
| 4062 | |
| 4063 | static void nfs4_lock_release(void *calldata) |
| 4064 | { |
| 4065 | struct nfs4_lockdata *data = calldata; |
| 4066 | |
| 4067 | dprintk("%s: begin!\n", __func__); |
| 4068 | nfs_free_seqid(data->arg.open_seqid); |
| 4069 | if (data->cancelled != 0) { |
| 4070 | struct rpc_task *task; |
| 4071 | task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, |
| 4072 | data->arg.lock_seqid); |
| 4073 | if (!IS_ERR(task)) |
| 4074 | rpc_put_task(task); |
| 4075 | dprintk("%s: cancelling lock!\n", __func__); |
| 4076 | } else |
| 4077 | nfs_free_seqid(data->arg.lock_seqid); |
| 4078 | nfs4_put_lock_state(data->lsp); |
| 4079 | put_nfs_open_context(data->ctx); |
| 4080 | kfree(data); |
| 4081 | dprintk("%s: done!\n", __func__); |
| 4082 | } |
| 4083 | |
| 4084 | static const struct rpc_call_ops nfs4_lock_ops = { |
| 4085 | .rpc_call_prepare = nfs4_lock_prepare, |
| 4086 | .rpc_call_done = nfs4_lock_done, |
| 4087 | .rpc_release = nfs4_lock_release, |
| 4088 | }; |
| 4089 | |
| 4090 | static const struct rpc_call_ops nfs4_recover_lock_ops = { |
| 4091 | .rpc_call_prepare = nfs4_recover_lock_prepare, |
| 4092 | .rpc_call_done = nfs4_lock_done, |
| 4093 | .rpc_release = nfs4_lock_release, |
| 4094 | }; |
| 4095 | |
| 4096 | static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) |
| 4097 | { |
| 4098 | struct nfs_client *clp = server->nfs_client; |
| 4099 | struct nfs4_state *state = lsp->ls_state; |
| 4100 | |
| 4101 | switch (error) { |
| 4102 | case -NFS4ERR_ADMIN_REVOKED: |
| 4103 | case -NFS4ERR_BAD_STATEID: |
| 4104 | case -NFS4ERR_EXPIRED: |
| 4105 | if (new_lock_owner != 0 || |
| 4106 | (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) |
| 4107 | nfs4_state_mark_reclaim_nograce(clp, state); |
| 4108 | lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; |
| 4109 | break; |
| 4110 | case -NFS4ERR_STALE_STATEID: |
| 4111 | if (new_lock_owner != 0 || |
| 4112 | (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) |
| 4113 | nfs4_state_mark_reclaim_reboot(clp, state); |
| 4114 | lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; |
| 4115 | }; |
| 4116 | } |
| 4117 | |
| 4118 | static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) |
| 4119 | { |
| 4120 | struct nfs4_lockdata *data; |
| 4121 | struct rpc_task *task; |
| 4122 | struct rpc_message msg = { |
| 4123 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], |
| 4124 | .rpc_cred = state->owner->so_cred, |
| 4125 | }; |
| 4126 | struct rpc_task_setup task_setup_data = { |
| 4127 | .rpc_client = NFS_CLIENT(state->inode), |
| 4128 | .rpc_message = &msg, |
| 4129 | .callback_ops = &nfs4_lock_ops, |
| 4130 | .workqueue = nfsiod_workqueue, |
| 4131 | .flags = RPC_TASK_ASYNC, |
| 4132 | }; |
| 4133 | int ret; |
| 4134 | |
| 4135 | dprintk("%s: begin!\n", __func__); |
| 4136 | data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), |
| 4137 | fl->fl_u.nfs4_fl.owner, |
| 4138 | recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS); |
| 4139 | if (data == NULL) |
| 4140 | return -ENOMEM; |
| 4141 | if (IS_SETLKW(cmd)) |
| 4142 | data->arg.block = 1; |
| 4143 | if (recovery_type > NFS_LOCK_NEW) { |
| 4144 | if (recovery_type == NFS_LOCK_RECLAIM) |
| 4145 | data->arg.reclaim = NFS_LOCK_RECLAIM; |
| 4146 | task_setup_data.callback_ops = &nfs4_recover_lock_ops; |
| 4147 | } |
| 4148 | msg.rpc_argp = &data->arg, |
| 4149 | msg.rpc_resp = &data->res, |
| 4150 | task_setup_data.callback_data = data; |
| 4151 | task = rpc_run_task(&task_setup_data); |
| 4152 | if (IS_ERR(task)) |
| 4153 | return PTR_ERR(task); |
| 4154 | ret = nfs4_wait_for_completion_rpc_task(task); |
| 4155 | if (ret == 0) { |
| 4156 | ret = data->rpc_status; |
| 4157 | if (ret) |
| 4158 | nfs4_handle_setlk_error(data->server, data->lsp, |
| 4159 | data->arg.new_lock_owner, ret); |
| 4160 | } else |
| 4161 | data->cancelled = 1; |
| 4162 | rpc_put_task(task); |
| 4163 | dprintk("%s: done, ret = %d!\n", __func__, ret); |
| 4164 | return ret; |
| 4165 | } |
| 4166 | |
| 4167 | static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) |
| 4168 | { |
| 4169 | struct nfs_server *server = NFS_SERVER(state->inode); |
| 4170 | struct nfs4_exception exception = { }; |
| 4171 | int err; |
| 4172 | |
| 4173 | do { |
| 4174 | /* Cache the lock if possible... */ |
| 4175 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) |
| 4176 | return 0; |
| 4177 | err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); |
| 4178 | if (err != -NFS4ERR_DELAY) |
| 4179 | break; |
| 4180 | nfs4_handle_exception(server, err, &exception); |
| 4181 | } while (exception.retry); |
| 4182 | return err; |
| 4183 | } |
| 4184 | |
| 4185 | static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) |
| 4186 | { |
| 4187 | struct nfs_server *server = NFS_SERVER(state->inode); |
| 4188 | struct nfs4_exception exception = { }; |
| 4189 | int err; |
| 4190 | |
| 4191 | err = nfs4_set_lock_state(state, request); |
| 4192 | if (err != 0) |
| 4193 | return err; |
| 4194 | do { |
| 4195 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) |
| 4196 | return 0; |
| 4197 | err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); |
| 4198 | switch (err) { |
| 4199 | default: |
| 4200 | goto out; |
| 4201 | case -NFS4ERR_GRACE: |
| 4202 | case -NFS4ERR_DELAY: |
| 4203 | nfs4_handle_exception(server, err, &exception); |
| 4204 | err = 0; |
| 4205 | } |
| 4206 | } while (exception.retry); |
| 4207 | out: |
| 4208 | return err; |
| 4209 | } |
| 4210 | |
| 4211 | static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
| 4212 | { |
| 4213 | struct nfs_inode *nfsi = NFS_I(state->inode); |
| 4214 | unsigned char fl_flags = request->fl_flags; |
| 4215 | int status = -ENOLCK; |
| 4216 | |
| 4217 | if ((fl_flags & FL_POSIX) && |
| 4218 | !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) |
| 4219 | goto out; |
| 4220 | /* Is this a delegated open? */ |
| 4221 | status = nfs4_set_lock_state(state, request); |
| 4222 | if (status != 0) |
| 4223 | goto out; |
| 4224 | request->fl_flags |= FL_ACCESS; |
| 4225 | status = do_vfs_lock(request->fl_file, request); |
| 4226 | if (status < 0) |
| 4227 | goto out; |
| 4228 | down_read(&nfsi->rwsem); |
| 4229 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { |
| 4230 | /* Yes: cache locks! */ |
| 4231 | /* ...but avoid races with delegation recall... */ |
| 4232 | request->fl_flags = fl_flags & ~FL_SLEEP; |
| 4233 | status = do_vfs_lock(request->fl_file, request); |
| 4234 | goto out_unlock; |
| 4235 | } |
| 4236 | status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); |
| 4237 | if (status != 0) |
| 4238 | goto out_unlock; |
| 4239 | /* Note: we always want to sleep here! */ |
| 4240 | request->fl_flags = fl_flags | FL_SLEEP; |
| 4241 | if (do_vfs_lock(request->fl_file, request) < 0) |
| 4242 | printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__); |
| 4243 | out_unlock: |
| 4244 | up_read(&nfsi->rwsem); |
| 4245 | out: |
| 4246 | request->fl_flags = fl_flags; |
| 4247 | return status; |
| 4248 | } |
| 4249 | |
| 4250 | static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
| 4251 | { |
| 4252 | struct nfs4_exception exception = { }; |
| 4253 | int err; |
| 4254 | |
| 4255 | do { |
| 4256 | err = _nfs4_proc_setlk(state, cmd, request); |
| 4257 | if (err == -NFS4ERR_DENIED) |
| 4258 | err = -EAGAIN; |
| 4259 | err = nfs4_handle_exception(NFS_SERVER(state->inode), |
| 4260 | err, &exception); |
| 4261 | } while (exception.retry); |
| 4262 | return err; |
| 4263 | } |
| 4264 | |
| 4265 | static int |
| 4266 | nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) |
| 4267 | { |
| 4268 | struct nfs_open_context *ctx; |
| 4269 | struct nfs4_state *state; |
| 4270 | unsigned long timeout = NFS4_LOCK_MINTIMEOUT; |
| 4271 | int status; |
| 4272 | |
| 4273 | /* verify open state */ |
| 4274 | ctx = nfs_file_open_context(filp); |
| 4275 | state = ctx->state; |
| 4276 | |
| 4277 | if (request->fl_start < 0 || request->fl_end < 0) |
| 4278 | return -EINVAL; |
| 4279 | |
| 4280 | if (IS_GETLK(cmd)) { |
| 4281 | if (state != NULL) |
| 4282 | return nfs4_proc_getlk(state, F_GETLK, request); |
| 4283 | return 0; |
| 4284 | } |
| 4285 | |
| 4286 | if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) |
| 4287 | return -EINVAL; |
| 4288 | |
| 4289 | if (request->fl_type == F_UNLCK) { |
| 4290 | if (state != NULL) |
| 4291 | return nfs4_proc_unlck(state, cmd, request); |
| 4292 | return 0; |
| 4293 | } |
| 4294 | |
| 4295 | if (state == NULL) |
| 4296 | return -ENOLCK; |
| 4297 | do { |
| 4298 | status = nfs4_proc_setlk(state, cmd, request); |
| 4299 | if ((status != -EAGAIN) || IS_SETLK(cmd)) |
| 4300 | break; |
| 4301 | timeout = nfs4_set_lock_task_retry(timeout); |
| 4302 | status = -ERESTARTSYS; |
| 4303 | if (signalled()) |
| 4304 | break; |
| 4305 | } while(status < 0); |
| 4306 | return status; |
| 4307 | } |
| 4308 | |
| 4309 | int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl) |
| 4310 | { |
| 4311 | struct nfs_server *server = NFS_SERVER(state->inode); |
| 4312 | struct nfs4_exception exception = { }; |
| 4313 | int err; |
| 4314 | |
| 4315 | err = nfs4_set_lock_state(state, fl); |
| 4316 | if (err != 0) |
| 4317 | goto out; |
| 4318 | do { |
| 4319 | err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); |
| 4320 | switch (err) { |
| 4321 | default: |
| 4322 | printk(KERN_ERR "%s: unhandled error %d.\n", |
| 4323 | __func__, err); |
| 4324 | case 0: |
| 4325 | case -ESTALE: |
| 4326 | goto out; |
| 4327 | case -NFS4ERR_EXPIRED: |
| 4328 | case -NFS4ERR_STALE_CLIENTID: |
| 4329 | case -NFS4ERR_STALE_STATEID: |
| 4330 | case -NFS4ERR_BADSESSION: |
| 4331 | case -NFS4ERR_BADSLOT: |
| 4332 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 4333 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
| 4334 | case -NFS4ERR_DEADSESSION: |
| 4335 | nfs4_schedule_state_recovery(server->nfs_client); |
| 4336 | goto out; |
| 4337 | case -ERESTARTSYS: |
| 4338 | /* |
| 4339 | * The show must go on: exit, but mark the |
| 4340 | * stateid as needing recovery. |
| 4341 | */ |
| 4342 | case -NFS4ERR_ADMIN_REVOKED: |
| 4343 | case -NFS4ERR_BAD_STATEID: |
| 4344 | case -NFS4ERR_OPENMODE: |
| 4345 | nfs4_state_mark_reclaim_nograce(server->nfs_client, state); |
| 4346 | err = 0; |
| 4347 | goto out; |
| 4348 | case -EKEYEXPIRED: |
| 4349 | /* |
| 4350 | * User RPCSEC_GSS context has expired. |
| 4351 | * We cannot recover this stateid now, so |
| 4352 | * skip it and allow recovery thread to |
| 4353 | * proceed. |
| 4354 | */ |
| 4355 | err = 0; |
| 4356 | goto out; |
| 4357 | case -ENOMEM: |
| 4358 | case -NFS4ERR_DENIED: |
| 4359 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ |
| 4360 | err = 0; |
| 4361 | goto out; |
| 4362 | case -NFS4ERR_DELAY: |
| 4363 | break; |
| 4364 | } |
| 4365 | err = nfs4_handle_exception(server, err, &exception); |
| 4366 | } while (exception.retry); |
| 4367 | out: |
| 4368 | return err; |
| 4369 | } |
| 4370 | |
| 4371 | static void nfs4_release_lockowner_release(void *calldata) |
| 4372 | { |
| 4373 | kfree(calldata); |
| 4374 | } |
| 4375 | |
| 4376 | const struct rpc_call_ops nfs4_release_lockowner_ops = { |
| 4377 | .rpc_release = nfs4_release_lockowner_release, |
| 4378 | }; |
| 4379 | |
| 4380 | void nfs4_release_lockowner(const struct nfs4_lock_state *lsp) |
| 4381 | { |
| 4382 | struct nfs_server *server = lsp->ls_state->owner->so_server; |
| 4383 | struct nfs_release_lockowner_args *args; |
| 4384 | struct rpc_message msg = { |
| 4385 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], |
| 4386 | }; |
| 4387 | |
| 4388 | if (server->nfs_client->cl_mvops->minor_version != 0) |
| 4389 | return; |
| 4390 | args = kmalloc(sizeof(*args), GFP_NOFS); |
| 4391 | if (!args) |
| 4392 | return; |
| 4393 | args->lock_owner.clientid = server->nfs_client->cl_clientid; |
| 4394 | args->lock_owner.id = lsp->ls_id.id; |
| 4395 | msg.rpc_argp = args; |
| 4396 | rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args); |
| 4397 | } |
| 4398 | |
| 4399 | #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" |
| 4400 | |
| 4401 | int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf, |
| 4402 | size_t buflen, int flags) |
| 4403 | { |
| 4404 | struct inode *inode = dentry->d_inode; |
| 4405 | |
| 4406 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) |
| 4407 | return -EOPNOTSUPP; |
| 4408 | |
| 4409 | return nfs4_proc_set_acl(inode, buf, buflen); |
| 4410 | } |
| 4411 | |
| 4412 | /* The getxattr man page suggests returning -ENODATA for unknown attributes, |
| 4413 | * and that's what we'll do for e.g. user attributes that haven't been set. |
| 4414 | * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported |
| 4415 | * attributes in kernel-managed attribute namespaces. */ |
| 4416 | ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf, |
| 4417 | size_t buflen) |
| 4418 | { |
| 4419 | struct inode *inode = dentry->d_inode; |
| 4420 | |
| 4421 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) |
| 4422 | return -EOPNOTSUPP; |
| 4423 | |
| 4424 | return nfs4_proc_get_acl(inode, buf, buflen); |
| 4425 | } |
| 4426 | |
| 4427 | ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen) |
| 4428 | { |
| 4429 | size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1; |
| 4430 | |
| 4431 | if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode))) |
| 4432 | return 0; |
| 4433 | if (buf && buflen < len) |
| 4434 | return -ERANGE; |
| 4435 | if (buf) |
| 4436 | memcpy(buf, XATTR_NAME_NFSV4_ACL, len); |
| 4437 | return len; |
| 4438 | } |
| 4439 | |
| 4440 | static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) |
| 4441 | { |
| 4442 | if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) && |
| 4443 | (fattr->valid & NFS_ATTR_FATTR_FSID) && |
| 4444 | (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL))) |
| 4445 | return; |
| 4446 | |
| 4447 | fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | |
| 4448 | NFS_ATTR_FATTR_NLINK; |
| 4449 | fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; |
| 4450 | fattr->nlink = 2; |
| 4451 | } |
| 4452 | |
| 4453 | int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name, |
| 4454 | struct nfs4_fs_locations *fs_locations, struct page *page) |
| 4455 | { |
| 4456 | struct nfs_server *server = NFS_SERVER(dir); |
| 4457 | u32 bitmask[2] = { |
| 4458 | [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, |
| 4459 | [1] = FATTR4_WORD1_MOUNTED_ON_FILEID, |
| 4460 | }; |
| 4461 | struct nfs4_fs_locations_arg args = { |
| 4462 | .dir_fh = NFS_FH(dir), |
| 4463 | .name = name, |
| 4464 | .page = page, |
| 4465 | .bitmask = bitmask, |
| 4466 | }; |
| 4467 | struct nfs4_fs_locations_res res = { |
| 4468 | .fs_locations = fs_locations, |
| 4469 | }; |
| 4470 | struct rpc_message msg = { |
| 4471 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], |
| 4472 | .rpc_argp = &args, |
| 4473 | .rpc_resp = &res, |
| 4474 | }; |
| 4475 | int status; |
| 4476 | |
| 4477 | dprintk("%s: start\n", __func__); |
| 4478 | nfs_fattr_init(&fs_locations->fattr); |
| 4479 | fs_locations->server = server; |
| 4480 | fs_locations->nlocations = 0; |
| 4481 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
| 4482 | nfs_fixup_referral_attributes(&fs_locations->fattr); |
| 4483 | dprintk("%s: returned status = %d\n", __func__, status); |
| 4484 | return status; |
| 4485 | } |
| 4486 | |
| 4487 | #ifdef CONFIG_NFS_V4_1 |
| 4488 | /* |
| 4489 | * nfs4_proc_exchange_id() |
| 4490 | * |
| 4491 | * Since the clientid has expired, all compounds using sessions |
| 4492 | * associated with the stale clientid will be returning |
| 4493 | * NFS4ERR_BADSESSION in the sequence operation, and will therefore |
| 4494 | * be in some phase of session reset. |
| 4495 | */ |
| 4496 | int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred) |
| 4497 | { |
| 4498 | nfs4_verifier verifier; |
| 4499 | struct nfs41_exchange_id_args args = { |
| 4500 | .client = clp, |
| 4501 | .flags = clp->cl_exchange_flags, |
| 4502 | }; |
| 4503 | struct nfs41_exchange_id_res res = { |
| 4504 | .client = clp, |
| 4505 | }; |
| 4506 | int status; |
| 4507 | struct rpc_message msg = { |
| 4508 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], |
| 4509 | .rpc_argp = &args, |
| 4510 | .rpc_resp = &res, |
| 4511 | .rpc_cred = cred, |
| 4512 | }; |
| 4513 | __be32 *p; |
| 4514 | |
| 4515 | dprintk("--> %s\n", __func__); |
| 4516 | BUG_ON(clp == NULL); |
| 4517 | |
| 4518 | /* Remove server-only flags */ |
| 4519 | args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R; |
| 4520 | |
| 4521 | p = (u32 *)verifier.data; |
| 4522 | *p++ = htonl((u32)clp->cl_boot_time.tv_sec); |
| 4523 | *p = htonl((u32)clp->cl_boot_time.tv_nsec); |
| 4524 | args.verifier = &verifier; |
| 4525 | |
| 4526 | while (1) { |
| 4527 | args.id_len = scnprintf(args.id, sizeof(args.id), |
| 4528 | "%s/%s %u", |
| 4529 | clp->cl_ipaddr, |
| 4530 | rpc_peeraddr2str(clp->cl_rpcclient, |
| 4531 | RPC_DISPLAY_ADDR), |
| 4532 | clp->cl_id_uniquifier); |
| 4533 | |
| 4534 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); |
| 4535 | |
| 4536 | if (status != -NFS4ERR_CLID_INUSE) |
| 4537 | break; |
| 4538 | |
| 4539 | if (signalled()) |
| 4540 | break; |
| 4541 | |
| 4542 | if (++clp->cl_id_uniquifier == 0) |
| 4543 | break; |
| 4544 | } |
| 4545 | |
| 4546 | dprintk("<-- %s status= %d\n", __func__, status); |
| 4547 | return status; |
| 4548 | } |
| 4549 | |
| 4550 | struct nfs4_get_lease_time_data { |
| 4551 | struct nfs4_get_lease_time_args *args; |
| 4552 | struct nfs4_get_lease_time_res *res; |
| 4553 | struct nfs_client *clp; |
| 4554 | }; |
| 4555 | |
| 4556 | static void nfs4_get_lease_time_prepare(struct rpc_task *task, |
| 4557 | void *calldata) |
| 4558 | { |
| 4559 | int ret; |
| 4560 | struct nfs4_get_lease_time_data *data = |
| 4561 | (struct nfs4_get_lease_time_data *)calldata; |
| 4562 | |
| 4563 | dprintk("--> %s\n", __func__); |
| 4564 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); |
| 4565 | /* just setup sequence, do not trigger session recovery |
| 4566 | since we're invoked within one */ |
| 4567 | ret = nfs41_setup_sequence(data->clp->cl_session, |
| 4568 | &data->args->la_seq_args, |
| 4569 | &data->res->lr_seq_res, 0, task); |
| 4570 | |
| 4571 | BUG_ON(ret == -EAGAIN); |
| 4572 | rpc_call_start(task); |
| 4573 | dprintk("<-- %s\n", __func__); |
| 4574 | } |
| 4575 | |
| 4576 | /* |
| 4577 | * Called from nfs4_state_manager thread for session setup, so don't recover |
| 4578 | * from sequence operation or clientid errors. |
| 4579 | */ |
| 4580 | static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) |
| 4581 | { |
| 4582 | struct nfs4_get_lease_time_data *data = |
| 4583 | (struct nfs4_get_lease_time_data *)calldata; |
| 4584 | |
| 4585 | dprintk("--> %s\n", __func__); |
| 4586 | if (!nfs41_sequence_done(task, &data->res->lr_seq_res)) |
| 4587 | return; |
| 4588 | switch (task->tk_status) { |
| 4589 | case -NFS4ERR_DELAY: |
| 4590 | case -NFS4ERR_GRACE: |
| 4591 | dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status); |
| 4592 | rpc_delay(task, NFS4_POLL_RETRY_MIN); |
| 4593 | task->tk_status = 0; |
| 4594 | nfs_restart_rpc(task, data->clp); |
| 4595 | return; |
| 4596 | } |
| 4597 | dprintk("<-- %s\n", __func__); |
| 4598 | } |
| 4599 | |
| 4600 | struct rpc_call_ops nfs4_get_lease_time_ops = { |
| 4601 | .rpc_call_prepare = nfs4_get_lease_time_prepare, |
| 4602 | .rpc_call_done = nfs4_get_lease_time_done, |
| 4603 | }; |
| 4604 | |
| 4605 | int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) |
| 4606 | { |
| 4607 | struct rpc_task *task; |
| 4608 | struct nfs4_get_lease_time_args args; |
| 4609 | struct nfs4_get_lease_time_res res = { |
| 4610 | .lr_fsinfo = fsinfo, |
| 4611 | }; |
| 4612 | struct nfs4_get_lease_time_data data = { |
| 4613 | .args = &args, |
| 4614 | .res = &res, |
| 4615 | .clp = clp, |
| 4616 | }; |
| 4617 | struct rpc_message msg = { |
| 4618 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], |
| 4619 | .rpc_argp = &args, |
| 4620 | .rpc_resp = &res, |
| 4621 | }; |
| 4622 | struct rpc_task_setup task_setup = { |
| 4623 | .rpc_client = clp->cl_rpcclient, |
| 4624 | .rpc_message = &msg, |
| 4625 | .callback_ops = &nfs4_get_lease_time_ops, |
| 4626 | .callback_data = &data |
| 4627 | }; |
| 4628 | int status; |
| 4629 | |
| 4630 | dprintk("--> %s\n", __func__); |
| 4631 | task = rpc_run_task(&task_setup); |
| 4632 | |
| 4633 | if (IS_ERR(task)) |
| 4634 | status = PTR_ERR(task); |
| 4635 | else { |
| 4636 | status = task->tk_status; |
| 4637 | rpc_put_task(task); |
| 4638 | } |
| 4639 | dprintk("<-- %s return %d\n", __func__, status); |
| 4640 | |
| 4641 | return status; |
| 4642 | } |
| 4643 | |
| 4644 | /* |
| 4645 | * Reset a slot table |
| 4646 | */ |
| 4647 | static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs, |
| 4648 | int ivalue) |
| 4649 | { |
| 4650 | struct nfs4_slot *new = NULL; |
| 4651 | int i; |
| 4652 | int ret = 0; |
| 4653 | |
| 4654 | dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__, |
| 4655 | max_reqs, tbl->max_slots); |
| 4656 | |
| 4657 | /* Does the newly negotiated max_reqs match the existing slot table? */ |
| 4658 | if (max_reqs != tbl->max_slots) { |
| 4659 | ret = -ENOMEM; |
| 4660 | new = kmalloc(max_reqs * sizeof(struct nfs4_slot), |
| 4661 | GFP_NOFS); |
| 4662 | if (!new) |
| 4663 | goto out; |
| 4664 | ret = 0; |
| 4665 | kfree(tbl->slots); |
| 4666 | } |
| 4667 | spin_lock(&tbl->slot_tbl_lock); |
| 4668 | if (new) { |
| 4669 | tbl->slots = new; |
| 4670 | tbl->max_slots = max_reqs; |
| 4671 | } |
| 4672 | for (i = 0; i < tbl->max_slots; ++i) |
| 4673 | tbl->slots[i].seq_nr = ivalue; |
| 4674 | spin_unlock(&tbl->slot_tbl_lock); |
| 4675 | dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__, |
| 4676 | tbl, tbl->slots, tbl->max_slots); |
| 4677 | out: |
| 4678 | dprintk("<-- %s: return %d\n", __func__, ret); |
| 4679 | return ret; |
| 4680 | } |
| 4681 | |
| 4682 | /* |
| 4683 | * Reset the forechannel and backchannel slot tables |
| 4684 | */ |
| 4685 | static int nfs4_reset_slot_tables(struct nfs4_session *session) |
| 4686 | { |
| 4687 | int status; |
| 4688 | |
| 4689 | status = nfs4_reset_slot_table(&session->fc_slot_table, |
| 4690 | session->fc_attrs.max_reqs, 1); |
| 4691 | if (status) |
| 4692 | return status; |
| 4693 | |
| 4694 | status = nfs4_reset_slot_table(&session->bc_slot_table, |
| 4695 | session->bc_attrs.max_reqs, 0); |
| 4696 | return status; |
| 4697 | } |
| 4698 | |
| 4699 | /* Destroy the slot table */ |
| 4700 | static void nfs4_destroy_slot_tables(struct nfs4_session *session) |
| 4701 | { |
| 4702 | if (session->fc_slot_table.slots != NULL) { |
| 4703 | kfree(session->fc_slot_table.slots); |
| 4704 | session->fc_slot_table.slots = NULL; |
| 4705 | } |
| 4706 | if (session->bc_slot_table.slots != NULL) { |
| 4707 | kfree(session->bc_slot_table.slots); |
| 4708 | session->bc_slot_table.slots = NULL; |
| 4709 | } |
| 4710 | return; |
| 4711 | } |
| 4712 | |
| 4713 | /* |
| 4714 | * Initialize slot table |
| 4715 | */ |
| 4716 | static int nfs4_init_slot_table(struct nfs4_slot_table *tbl, |
| 4717 | int max_slots, int ivalue) |
| 4718 | { |
| 4719 | struct nfs4_slot *slot; |
| 4720 | int ret = -ENOMEM; |
| 4721 | |
| 4722 | BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE); |
| 4723 | |
| 4724 | dprintk("--> %s: max_reqs=%u\n", __func__, max_slots); |
| 4725 | |
| 4726 | slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS); |
| 4727 | if (!slot) |
| 4728 | goto out; |
| 4729 | ret = 0; |
| 4730 | |
| 4731 | spin_lock(&tbl->slot_tbl_lock); |
| 4732 | tbl->max_slots = max_slots; |
| 4733 | tbl->slots = slot; |
| 4734 | tbl->highest_used_slotid = -1; /* no slot is currently used */ |
| 4735 | spin_unlock(&tbl->slot_tbl_lock); |
| 4736 | dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__, |
| 4737 | tbl, tbl->slots, tbl->max_slots); |
| 4738 | out: |
| 4739 | dprintk("<-- %s: return %d\n", __func__, ret); |
| 4740 | return ret; |
| 4741 | } |
| 4742 | |
| 4743 | /* |
| 4744 | * Initialize the forechannel and backchannel tables |
| 4745 | */ |
| 4746 | static int nfs4_init_slot_tables(struct nfs4_session *session) |
| 4747 | { |
| 4748 | struct nfs4_slot_table *tbl; |
| 4749 | int status = 0; |
| 4750 | |
| 4751 | tbl = &session->fc_slot_table; |
| 4752 | if (tbl->slots == NULL) { |
| 4753 | status = nfs4_init_slot_table(tbl, |
| 4754 | session->fc_attrs.max_reqs, 1); |
| 4755 | if (status) |
| 4756 | return status; |
| 4757 | } |
| 4758 | |
| 4759 | tbl = &session->bc_slot_table; |
| 4760 | if (tbl->slots == NULL) { |
| 4761 | status = nfs4_init_slot_table(tbl, |
| 4762 | session->bc_attrs.max_reqs, 0); |
| 4763 | if (status) |
| 4764 | nfs4_destroy_slot_tables(session); |
| 4765 | } |
| 4766 | |
| 4767 | return status; |
| 4768 | } |
| 4769 | |
| 4770 | struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp) |
| 4771 | { |
| 4772 | struct nfs4_session *session; |
| 4773 | struct nfs4_slot_table *tbl; |
| 4774 | |
| 4775 | session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS); |
| 4776 | if (!session) |
| 4777 | return NULL; |
| 4778 | |
| 4779 | init_completion(&session->complete); |
| 4780 | |
| 4781 | tbl = &session->fc_slot_table; |
| 4782 | tbl->highest_used_slotid = -1; |
| 4783 | spin_lock_init(&tbl->slot_tbl_lock); |
| 4784 | rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table"); |
| 4785 | |
| 4786 | tbl = &session->bc_slot_table; |
| 4787 | tbl->highest_used_slotid = -1; |
| 4788 | spin_lock_init(&tbl->slot_tbl_lock); |
| 4789 | rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table"); |
| 4790 | |
| 4791 | session->session_state = 1<<NFS4_SESSION_INITING; |
| 4792 | |
| 4793 | session->clp = clp; |
| 4794 | return session; |
| 4795 | } |
| 4796 | |
| 4797 | void nfs4_destroy_session(struct nfs4_session *session) |
| 4798 | { |
| 4799 | nfs4_proc_destroy_session(session); |
| 4800 | dprintk("%s Destroy backchannel for xprt %p\n", |
| 4801 | __func__, session->clp->cl_rpcclient->cl_xprt); |
| 4802 | xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt, |
| 4803 | NFS41_BC_MIN_CALLBACKS); |
| 4804 | nfs4_destroy_slot_tables(session); |
| 4805 | kfree(session); |
| 4806 | } |
| 4807 | |
| 4808 | /* |
| 4809 | * Initialize the values to be used by the client in CREATE_SESSION |
| 4810 | * If nfs4_init_session set the fore channel request and response sizes, |
| 4811 | * use them. |
| 4812 | * |
| 4813 | * Set the back channel max_resp_sz_cached to zero to force the client to |
| 4814 | * always set csa_cachethis to FALSE because the current implementation |
| 4815 | * of the back channel DRC only supports caching the CB_SEQUENCE operation. |
| 4816 | */ |
| 4817 | static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args) |
| 4818 | { |
| 4819 | struct nfs4_session *session = args->client->cl_session; |
| 4820 | unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz, |
| 4821 | mxresp_sz = session->fc_attrs.max_resp_sz; |
| 4822 | |
| 4823 | if (mxrqst_sz == 0) |
| 4824 | mxrqst_sz = NFS_MAX_FILE_IO_SIZE; |
| 4825 | if (mxresp_sz == 0) |
| 4826 | mxresp_sz = NFS_MAX_FILE_IO_SIZE; |
| 4827 | /* Fore channel attributes */ |
| 4828 | args->fc_attrs.headerpadsz = 0; |
| 4829 | args->fc_attrs.max_rqst_sz = mxrqst_sz; |
| 4830 | args->fc_attrs.max_resp_sz = mxresp_sz; |
| 4831 | args->fc_attrs.max_ops = NFS4_MAX_OPS; |
| 4832 | args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs; |
| 4833 | |
| 4834 | dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " |
| 4835 | "max_ops=%u max_reqs=%u\n", |
| 4836 | __func__, |
| 4837 | args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, |
| 4838 | args->fc_attrs.max_ops, args->fc_attrs.max_reqs); |
| 4839 | |
| 4840 | /* Back channel attributes */ |
| 4841 | args->bc_attrs.headerpadsz = 0; |
| 4842 | args->bc_attrs.max_rqst_sz = PAGE_SIZE; |
| 4843 | args->bc_attrs.max_resp_sz = PAGE_SIZE; |
| 4844 | args->bc_attrs.max_resp_sz_cached = 0; |
| 4845 | args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; |
| 4846 | args->bc_attrs.max_reqs = 1; |
| 4847 | |
| 4848 | dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " |
| 4849 | "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", |
| 4850 | __func__, |
| 4851 | args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, |
| 4852 | args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, |
| 4853 | args->bc_attrs.max_reqs); |
| 4854 | } |
| 4855 | |
| 4856 | static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session) |
| 4857 | { |
| 4858 | struct nfs4_channel_attrs *sent = &args->fc_attrs; |
| 4859 | struct nfs4_channel_attrs *rcvd = &session->fc_attrs; |
| 4860 | |
| 4861 | if (rcvd->headerpadsz > sent->headerpadsz) |
| 4862 | return -EINVAL; |
| 4863 | if (rcvd->max_resp_sz > sent->max_resp_sz) |
| 4864 | return -EINVAL; |
| 4865 | /* |
| 4866 | * Our requested max_ops is the minimum we need; we're not |
| 4867 | * prepared to break up compounds into smaller pieces than that. |
| 4868 | * So, no point even trying to continue if the server won't |
| 4869 | * cooperate: |
| 4870 | */ |
| 4871 | if (rcvd->max_ops < sent->max_ops) |
| 4872 | return -EINVAL; |
| 4873 | if (rcvd->max_reqs == 0) |
| 4874 | return -EINVAL; |
| 4875 | return 0; |
| 4876 | } |
| 4877 | |
| 4878 | static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session) |
| 4879 | { |
| 4880 | struct nfs4_channel_attrs *sent = &args->bc_attrs; |
| 4881 | struct nfs4_channel_attrs *rcvd = &session->bc_attrs; |
| 4882 | |
| 4883 | if (rcvd->max_rqst_sz > sent->max_rqst_sz) |
| 4884 | return -EINVAL; |
| 4885 | if (rcvd->max_resp_sz < sent->max_resp_sz) |
| 4886 | return -EINVAL; |
| 4887 | if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached) |
| 4888 | return -EINVAL; |
| 4889 | /* These would render the backchannel useless: */ |
| 4890 | if (rcvd->max_ops == 0) |
| 4891 | return -EINVAL; |
| 4892 | if (rcvd->max_reqs == 0) |
| 4893 | return -EINVAL; |
| 4894 | return 0; |
| 4895 | } |
| 4896 | |
| 4897 | static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, |
| 4898 | struct nfs4_session *session) |
| 4899 | { |
| 4900 | int ret; |
| 4901 | |
| 4902 | ret = nfs4_verify_fore_channel_attrs(args, session); |
| 4903 | if (ret) |
| 4904 | return ret; |
| 4905 | return nfs4_verify_back_channel_attrs(args, session); |
| 4906 | } |
| 4907 | |
| 4908 | static int _nfs4_proc_create_session(struct nfs_client *clp) |
| 4909 | { |
| 4910 | struct nfs4_session *session = clp->cl_session; |
| 4911 | struct nfs41_create_session_args args = { |
| 4912 | .client = clp, |
| 4913 | .cb_program = NFS4_CALLBACK, |
| 4914 | }; |
| 4915 | struct nfs41_create_session_res res = { |
| 4916 | .client = clp, |
| 4917 | }; |
| 4918 | struct rpc_message msg = { |
| 4919 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], |
| 4920 | .rpc_argp = &args, |
| 4921 | .rpc_resp = &res, |
| 4922 | }; |
| 4923 | int status; |
| 4924 | |
| 4925 | nfs4_init_channel_attrs(&args); |
| 4926 | args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); |
| 4927 | |
| 4928 | status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0); |
| 4929 | |
| 4930 | if (!status) |
| 4931 | /* Verify the session's negotiated channel_attrs values */ |
| 4932 | status = nfs4_verify_channel_attrs(&args, session); |
| 4933 | if (!status) { |
| 4934 | /* Increment the clientid slot sequence id */ |
| 4935 | clp->cl_seqid++; |
| 4936 | } |
| 4937 | |
| 4938 | return status; |
| 4939 | } |
| 4940 | |
| 4941 | /* |
| 4942 | * Issues a CREATE_SESSION operation to the server. |
| 4943 | * It is the responsibility of the caller to verify the session is |
| 4944 | * expired before calling this routine. |
| 4945 | */ |
| 4946 | int nfs4_proc_create_session(struct nfs_client *clp) |
| 4947 | { |
| 4948 | int status; |
| 4949 | unsigned *ptr; |
| 4950 | struct nfs4_session *session = clp->cl_session; |
| 4951 | |
| 4952 | dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); |
| 4953 | |
| 4954 | status = _nfs4_proc_create_session(clp); |
| 4955 | if (status) |
| 4956 | goto out; |
| 4957 | |
| 4958 | /* Init and reset the fore channel */ |
| 4959 | status = nfs4_init_slot_tables(session); |
| 4960 | dprintk("slot table initialization returned %d\n", status); |
| 4961 | if (status) |
| 4962 | goto out; |
| 4963 | status = nfs4_reset_slot_tables(session); |
| 4964 | dprintk("slot table reset returned %d\n", status); |
| 4965 | if (status) |
| 4966 | goto out; |
| 4967 | |
| 4968 | ptr = (unsigned *)&session->sess_id.data[0]; |
| 4969 | dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, |
| 4970 | clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); |
| 4971 | out: |
| 4972 | dprintk("<-- %s\n", __func__); |
| 4973 | return status; |
| 4974 | } |
| 4975 | |
| 4976 | /* |
| 4977 | * Issue the over-the-wire RPC DESTROY_SESSION. |
| 4978 | * The caller must serialize access to this routine. |
| 4979 | */ |
| 4980 | int nfs4_proc_destroy_session(struct nfs4_session *session) |
| 4981 | { |
| 4982 | int status = 0; |
| 4983 | struct rpc_message msg; |
| 4984 | |
| 4985 | dprintk("--> nfs4_proc_destroy_session\n"); |
| 4986 | |
| 4987 | /* session is still being setup */ |
| 4988 | if (session->clp->cl_cons_state != NFS_CS_READY) |
| 4989 | return status; |
| 4990 | |
| 4991 | msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION]; |
| 4992 | msg.rpc_argp = session; |
| 4993 | msg.rpc_resp = NULL; |
| 4994 | msg.rpc_cred = NULL; |
| 4995 | status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0); |
| 4996 | |
| 4997 | if (status) |
| 4998 | printk(KERN_WARNING |
| 4999 | "Got error %d from the server on DESTROY_SESSION. " |
| 5000 | "Session has been destroyed regardless...\n", status); |
| 5001 | |
| 5002 | dprintk("<-- nfs4_proc_destroy_session\n"); |
| 5003 | return status; |
| 5004 | } |
| 5005 | |
| 5006 | int nfs4_init_session(struct nfs_server *server) |
| 5007 | { |
| 5008 | struct nfs_client *clp = server->nfs_client; |
| 5009 | struct nfs4_session *session; |
| 5010 | unsigned int rsize, wsize; |
| 5011 | int ret; |
| 5012 | |
| 5013 | if (!nfs4_has_session(clp)) |
| 5014 | return 0; |
| 5015 | |
| 5016 | session = clp->cl_session; |
| 5017 | if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) |
| 5018 | return 0; |
| 5019 | |
| 5020 | rsize = server->rsize; |
| 5021 | if (rsize == 0) |
| 5022 | rsize = NFS_MAX_FILE_IO_SIZE; |
| 5023 | wsize = server->wsize; |
| 5024 | if (wsize == 0) |
| 5025 | wsize = NFS_MAX_FILE_IO_SIZE; |
| 5026 | |
| 5027 | session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead; |
| 5028 | session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead; |
| 5029 | |
| 5030 | ret = nfs4_recover_expired_lease(server); |
| 5031 | if (!ret) |
| 5032 | ret = nfs4_check_client_ready(clp); |
| 5033 | return ret; |
| 5034 | } |
| 5035 | |
| 5036 | /* |
| 5037 | * Renew the cl_session lease. |
| 5038 | */ |
| 5039 | struct nfs4_sequence_data { |
| 5040 | struct nfs_client *clp; |
| 5041 | struct nfs4_sequence_args args; |
| 5042 | struct nfs4_sequence_res res; |
| 5043 | }; |
| 5044 | |
| 5045 | static void nfs41_sequence_release(void *data) |
| 5046 | { |
| 5047 | struct nfs4_sequence_data *calldata = data; |
| 5048 | struct nfs_client *clp = calldata->clp; |
| 5049 | |
| 5050 | if (atomic_read(&clp->cl_count) > 1) |
| 5051 | nfs4_schedule_state_renewal(clp); |
| 5052 | nfs_put_client(clp); |
| 5053 | kfree(calldata); |
| 5054 | } |
| 5055 | |
| 5056 | static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) |
| 5057 | { |
| 5058 | switch(task->tk_status) { |
| 5059 | case -NFS4ERR_DELAY: |
| 5060 | rpc_delay(task, NFS4_POLL_RETRY_MAX); |
| 5061 | return -EAGAIN; |
| 5062 | default: |
| 5063 | nfs4_schedule_state_recovery(clp); |
| 5064 | } |
| 5065 | return 0; |
| 5066 | } |
| 5067 | |
| 5068 | static void nfs41_sequence_call_done(struct rpc_task *task, void *data) |
| 5069 | { |
| 5070 | struct nfs4_sequence_data *calldata = data; |
| 5071 | struct nfs_client *clp = calldata->clp; |
| 5072 | |
| 5073 | if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) |
| 5074 | return; |
| 5075 | |
| 5076 | if (task->tk_status < 0) { |
| 5077 | dprintk("%s ERROR %d\n", __func__, task->tk_status); |
| 5078 | if (atomic_read(&clp->cl_count) == 1) |
| 5079 | goto out; |
| 5080 | |
| 5081 | if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { |
| 5082 | rpc_restart_call_prepare(task); |
| 5083 | return; |
| 5084 | } |
| 5085 | } |
| 5086 | dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); |
| 5087 | out: |
| 5088 | dprintk("<-- %s\n", __func__); |
| 5089 | } |
| 5090 | |
| 5091 | static void nfs41_sequence_prepare(struct rpc_task *task, void *data) |
| 5092 | { |
| 5093 | struct nfs4_sequence_data *calldata = data; |
| 5094 | struct nfs_client *clp = calldata->clp; |
| 5095 | struct nfs4_sequence_args *args; |
| 5096 | struct nfs4_sequence_res *res; |
| 5097 | |
| 5098 | args = task->tk_msg.rpc_argp; |
| 5099 | res = task->tk_msg.rpc_resp; |
| 5100 | |
| 5101 | if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task)) |
| 5102 | return; |
| 5103 | rpc_call_start(task); |
| 5104 | } |
| 5105 | |
| 5106 | static const struct rpc_call_ops nfs41_sequence_ops = { |
| 5107 | .rpc_call_done = nfs41_sequence_call_done, |
| 5108 | .rpc_call_prepare = nfs41_sequence_prepare, |
| 5109 | .rpc_release = nfs41_sequence_release, |
| 5110 | }; |
| 5111 | |
| 5112 | static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred) |
| 5113 | { |
| 5114 | struct nfs4_sequence_data *calldata; |
| 5115 | struct rpc_message msg = { |
| 5116 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], |
| 5117 | .rpc_cred = cred, |
| 5118 | }; |
| 5119 | struct rpc_task_setup task_setup_data = { |
| 5120 | .rpc_client = clp->cl_rpcclient, |
| 5121 | .rpc_message = &msg, |
| 5122 | .callback_ops = &nfs41_sequence_ops, |
| 5123 | .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT, |
| 5124 | }; |
| 5125 | |
| 5126 | if (!atomic_inc_not_zero(&clp->cl_count)) |
| 5127 | return ERR_PTR(-EIO); |
| 5128 | calldata = kzalloc(sizeof(*calldata), GFP_NOFS); |
| 5129 | if (calldata == NULL) { |
| 5130 | nfs_put_client(clp); |
| 5131 | return ERR_PTR(-ENOMEM); |
| 5132 | } |
| 5133 | msg.rpc_argp = &calldata->args; |
| 5134 | msg.rpc_resp = &calldata->res; |
| 5135 | calldata->clp = clp; |
| 5136 | task_setup_data.callback_data = calldata; |
| 5137 | |
| 5138 | return rpc_run_task(&task_setup_data); |
| 5139 | } |
| 5140 | |
| 5141 | static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred) |
| 5142 | { |
| 5143 | struct rpc_task *task; |
| 5144 | int ret = 0; |
| 5145 | |
| 5146 | task = _nfs41_proc_sequence(clp, cred); |
| 5147 | if (IS_ERR(task)) |
| 5148 | ret = PTR_ERR(task); |
| 5149 | else |
| 5150 | rpc_put_task(task); |
| 5151 | dprintk("<-- %s status=%d\n", __func__, ret); |
| 5152 | return ret; |
| 5153 | } |
| 5154 | |
| 5155 | static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred) |
| 5156 | { |
| 5157 | struct rpc_task *task; |
| 5158 | int ret; |
| 5159 | |
| 5160 | task = _nfs41_proc_sequence(clp, cred); |
| 5161 | if (IS_ERR(task)) { |
| 5162 | ret = PTR_ERR(task); |
| 5163 | goto out; |
| 5164 | } |
| 5165 | ret = rpc_wait_for_completion_task(task); |
| 5166 | if (!ret) |
| 5167 | ret = task->tk_status; |
| 5168 | rpc_put_task(task); |
| 5169 | out: |
| 5170 | dprintk("<-- %s status=%d\n", __func__, ret); |
| 5171 | return ret; |
| 5172 | } |
| 5173 | |
| 5174 | struct nfs4_reclaim_complete_data { |
| 5175 | struct nfs_client *clp; |
| 5176 | struct nfs41_reclaim_complete_args arg; |
| 5177 | struct nfs41_reclaim_complete_res res; |
| 5178 | }; |
| 5179 | |
| 5180 | static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) |
| 5181 | { |
| 5182 | struct nfs4_reclaim_complete_data *calldata = data; |
| 5183 | |
| 5184 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); |
| 5185 | if (nfs41_setup_sequence(calldata->clp->cl_session, |
| 5186 | &calldata->arg.seq_args, |
| 5187 | &calldata->res.seq_res, 0, task)) |
| 5188 | return; |
| 5189 | |
| 5190 | rpc_call_start(task); |
| 5191 | } |
| 5192 | |
| 5193 | static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) |
| 5194 | { |
| 5195 | switch(task->tk_status) { |
| 5196 | case 0: |
| 5197 | case -NFS4ERR_COMPLETE_ALREADY: |
| 5198 | case -NFS4ERR_WRONG_CRED: /* What to do here? */ |
| 5199 | break; |
| 5200 | case -NFS4ERR_DELAY: |
| 5201 | rpc_delay(task, NFS4_POLL_RETRY_MAX); |
| 5202 | return -EAGAIN; |
| 5203 | default: |
| 5204 | nfs4_schedule_state_recovery(clp); |
| 5205 | } |
| 5206 | return 0; |
| 5207 | } |
| 5208 | |
| 5209 | static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) |
| 5210 | { |
| 5211 | struct nfs4_reclaim_complete_data *calldata = data; |
| 5212 | struct nfs_client *clp = calldata->clp; |
| 5213 | struct nfs4_sequence_res *res = &calldata->res.seq_res; |
| 5214 | |
| 5215 | dprintk("--> %s\n", __func__); |
| 5216 | if (!nfs41_sequence_done(task, res)) |
| 5217 | return; |
| 5218 | |
| 5219 | if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { |
| 5220 | rpc_restart_call_prepare(task); |
| 5221 | return; |
| 5222 | } |
| 5223 | dprintk("<-- %s\n", __func__); |
| 5224 | } |
| 5225 | |
| 5226 | static void nfs4_free_reclaim_complete_data(void *data) |
| 5227 | { |
| 5228 | struct nfs4_reclaim_complete_data *calldata = data; |
| 5229 | |
| 5230 | kfree(calldata); |
| 5231 | } |
| 5232 | |
| 5233 | static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { |
| 5234 | .rpc_call_prepare = nfs4_reclaim_complete_prepare, |
| 5235 | .rpc_call_done = nfs4_reclaim_complete_done, |
| 5236 | .rpc_release = nfs4_free_reclaim_complete_data, |
| 5237 | }; |
| 5238 | |
| 5239 | /* |
| 5240 | * Issue a global reclaim complete. |
| 5241 | */ |
| 5242 | static int nfs41_proc_reclaim_complete(struct nfs_client *clp) |
| 5243 | { |
| 5244 | struct nfs4_reclaim_complete_data *calldata; |
| 5245 | struct rpc_task *task; |
| 5246 | struct rpc_message msg = { |
| 5247 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], |
| 5248 | }; |
| 5249 | struct rpc_task_setup task_setup_data = { |
| 5250 | .rpc_client = clp->cl_rpcclient, |
| 5251 | .rpc_message = &msg, |
| 5252 | .callback_ops = &nfs4_reclaim_complete_call_ops, |
| 5253 | .flags = RPC_TASK_ASYNC, |
| 5254 | }; |
| 5255 | int status = -ENOMEM; |
| 5256 | |
| 5257 | dprintk("--> %s\n", __func__); |
| 5258 | calldata = kzalloc(sizeof(*calldata), GFP_NOFS); |
| 5259 | if (calldata == NULL) |
| 5260 | goto out; |
| 5261 | calldata->clp = clp; |
| 5262 | calldata->arg.one_fs = 0; |
| 5263 | |
| 5264 | msg.rpc_argp = &calldata->arg; |
| 5265 | msg.rpc_resp = &calldata->res; |
| 5266 | task_setup_data.callback_data = calldata; |
| 5267 | task = rpc_run_task(&task_setup_data); |
| 5268 | if (IS_ERR(task)) { |
| 5269 | status = PTR_ERR(task); |
| 5270 | goto out; |
| 5271 | } |
| 5272 | rpc_put_task(task); |
| 5273 | return 0; |
| 5274 | out: |
| 5275 | dprintk("<-- %s status=%d\n", __func__, status); |
| 5276 | return status; |
| 5277 | } |
| 5278 | |
| 5279 | static void |
| 5280 | nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) |
| 5281 | { |
| 5282 | struct nfs4_layoutget *lgp = calldata; |
| 5283 | struct inode *ino = lgp->args.inode; |
| 5284 | struct nfs_server *server = NFS_SERVER(ino); |
| 5285 | |
| 5286 | dprintk("--> %s\n", __func__); |
| 5287 | if (nfs4_setup_sequence(server, &lgp->args.seq_args, |
| 5288 | &lgp->res.seq_res, 0, task)) |
| 5289 | return; |
| 5290 | rpc_call_start(task); |
| 5291 | } |
| 5292 | |
| 5293 | static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) |
| 5294 | { |
| 5295 | struct nfs4_layoutget *lgp = calldata; |
| 5296 | struct nfs_server *server = NFS_SERVER(lgp->args.inode); |
| 5297 | |
| 5298 | dprintk("--> %s\n", __func__); |
| 5299 | |
| 5300 | if (!nfs4_sequence_done(task, &lgp->res.seq_res)) |
| 5301 | return; |
| 5302 | |
| 5303 | switch (task->tk_status) { |
| 5304 | case 0: |
| 5305 | break; |
| 5306 | case -NFS4ERR_LAYOUTTRYLATER: |
| 5307 | case -NFS4ERR_RECALLCONFLICT: |
| 5308 | task->tk_status = -NFS4ERR_DELAY; |
| 5309 | /* Fall through */ |
| 5310 | default: |
| 5311 | if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) { |
| 5312 | rpc_restart_call_prepare(task); |
| 5313 | return; |
| 5314 | } |
| 5315 | } |
| 5316 | lgp->status = task->tk_status; |
| 5317 | dprintk("<-- %s\n", __func__); |
| 5318 | } |
| 5319 | |
| 5320 | static void nfs4_layoutget_release(void *calldata) |
| 5321 | { |
| 5322 | struct nfs4_layoutget *lgp = calldata; |
| 5323 | |
| 5324 | dprintk("--> %s\n", __func__); |
| 5325 | put_layout_hdr(lgp->args.inode); |
| 5326 | if (lgp->res.layout.buf != NULL) |
| 5327 | free_page((unsigned long) lgp->res.layout.buf); |
| 5328 | put_nfs_open_context(lgp->args.ctx); |
| 5329 | kfree(calldata); |
| 5330 | dprintk("<-- %s\n", __func__); |
| 5331 | } |
| 5332 | |
| 5333 | static const struct rpc_call_ops nfs4_layoutget_call_ops = { |
| 5334 | .rpc_call_prepare = nfs4_layoutget_prepare, |
| 5335 | .rpc_call_done = nfs4_layoutget_done, |
| 5336 | .rpc_release = nfs4_layoutget_release, |
| 5337 | }; |
| 5338 | |
| 5339 | int nfs4_proc_layoutget(struct nfs4_layoutget *lgp) |
| 5340 | { |
| 5341 | struct nfs_server *server = NFS_SERVER(lgp->args.inode); |
| 5342 | struct rpc_task *task; |
| 5343 | struct rpc_message msg = { |
| 5344 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET], |
| 5345 | .rpc_argp = &lgp->args, |
| 5346 | .rpc_resp = &lgp->res, |
| 5347 | }; |
| 5348 | struct rpc_task_setup task_setup_data = { |
| 5349 | .rpc_client = server->client, |
| 5350 | .rpc_message = &msg, |
| 5351 | .callback_ops = &nfs4_layoutget_call_ops, |
| 5352 | .callback_data = lgp, |
| 5353 | .flags = RPC_TASK_ASYNC, |
| 5354 | }; |
| 5355 | int status = 0; |
| 5356 | |
| 5357 | dprintk("--> %s\n", __func__); |
| 5358 | |
| 5359 | lgp->res.layout.buf = (void *)__get_free_page(GFP_NOFS); |
| 5360 | if (lgp->res.layout.buf == NULL) { |
| 5361 | nfs4_layoutget_release(lgp); |
| 5362 | return -ENOMEM; |
| 5363 | } |
| 5364 | |
| 5365 | lgp->res.seq_res.sr_slot = NULL; |
| 5366 | task = rpc_run_task(&task_setup_data); |
| 5367 | if (IS_ERR(task)) |
| 5368 | return PTR_ERR(task); |
| 5369 | status = nfs4_wait_for_completion_rpc_task(task); |
| 5370 | if (status != 0) |
| 5371 | goto out; |
| 5372 | status = lgp->status; |
| 5373 | if (status != 0) |
| 5374 | goto out; |
| 5375 | status = pnfs_layout_process(lgp); |
| 5376 | out: |
| 5377 | rpc_put_task(task); |
| 5378 | dprintk("<-- %s status=%d\n", __func__, status); |
| 5379 | return status; |
| 5380 | } |
| 5381 | |
| 5382 | static int |
| 5383 | _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev) |
| 5384 | { |
| 5385 | struct nfs4_getdeviceinfo_args args = { |
| 5386 | .pdev = pdev, |
| 5387 | }; |
| 5388 | struct nfs4_getdeviceinfo_res res = { |
| 5389 | .pdev = pdev, |
| 5390 | }; |
| 5391 | struct rpc_message msg = { |
| 5392 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO], |
| 5393 | .rpc_argp = &args, |
| 5394 | .rpc_resp = &res, |
| 5395 | }; |
| 5396 | int status; |
| 5397 | |
| 5398 | dprintk("--> %s\n", __func__); |
| 5399 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
| 5400 | dprintk("<-- %s status=%d\n", __func__, status); |
| 5401 | |
| 5402 | return status; |
| 5403 | } |
| 5404 | |
| 5405 | int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev) |
| 5406 | { |
| 5407 | struct nfs4_exception exception = { }; |
| 5408 | int err; |
| 5409 | |
| 5410 | do { |
| 5411 | err = nfs4_handle_exception(server, |
| 5412 | _nfs4_proc_getdeviceinfo(server, pdev), |
| 5413 | &exception); |
| 5414 | } while (exception.retry); |
| 5415 | return err; |
| 5416 | } |
| 5417 | EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo); |
| 5418 | |
| 5419 | #endif /* CONFIG_NFS_V4_1 */ |
| 5420 | |
| 5421 | struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { |
| 5422 | .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, |
| 5423 | .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, |
| 5424 | .recover_open = nfs4_open_reclaim, |
| 5425 | .recover_lock = nfs4_lock_reclaim, |
| 5426 | .establish_clid = nfs4_init_clientid, |
| 5427 | .get_clid_cred = nfs4_get_setclientid_cred, |
| 5428 | }; |
| 5429 | |
| 5430 | #if defined(CONFIG_NFS_V4_1) |
| 5431 | struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { |
| 5432 | .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, |
| 5433 | .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, |
| 5434 | .recover_open = nfs4_open_reclaim, |
| 5435 | .recover_lock = nfs4_lock_reclaim, |
| 5436 | .establish_clid = nfs41_init_clientid, |
| 5437 | .get_clid_cred = nfs4_get_exchange_id_cred, |
| 5438 | .reclaim_complete = nfs41_proc_reclaim_complete, |
| 5439 | }; |
| 5440 | #endif /* CONFIG_NFS_V4_1 */ |
| 5441 | |
| 5442 | struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { |
| 5443 | .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, |
| 5444 | .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, |
| 5445 | .recover_open = nfs4_open_expired, |
| 5446 | .recover_lock = nfs4_lock_expired, |
| 5447 | .establish_clid = nfs4_init_clientid, |
| 5448 | .get_clid_cred = nfs4_get_setclientid_cred, |
| 5449 | }; |
| 5450 | |
| 5451 | #if defined(CONFIG_NFS_V4_1) |
| 5452 | struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { |
| 5453 | .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, |
| 5454 | .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, |
| 5455 | .recover_open = nfs4_open_expired, |
| 5456 | .recover_lock = nfs4_lock_expired, |
| 5457 | .establish_clid = nfs41_init_clientid, |
| 5458 | .get_clid_cred = nfs4_get_exchange_id_cred, |
| 5459 | }; |
| 5460 | #endif /* CONFIG_NFS_V4_1 */ |
| 5461 | |
| 5462 | struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { |
| 5463 | .sched_state_renewal = nfs4_proc_async_renew, |
| 5464 | .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked, |
| 5465 | .renew_lease = nfs4_proc_renew, |
| 5466 | }; |
| 5467 | |
| 5468 | #if defined(CONFIG_NFS_V4_1) |
| 5469 | struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { |
| 5470 | .sched_state_renewal = nfs41_proc_async_sequence, |
| 5471 | .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked, |
| 5472 | .renew_lease = nfs4_proc_sequence, |
| 5473 | }; |
| 5474 | #endif |
| 5475 | |
| 5476 | static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { |
| 5477 | .minor_version = 0, |
| 5478 | .call_sync = _nfs4_call_sync, |
| 5479 | .validate_stateid = nfs4_validate_delegation_stateid, |
| 5480 | .reboot_recovery_ops = &nfs40_reboot_recovery_ops, |
| 5481 | .nograce_recovery_ops = &nfs40_nograce_recovery_ops, |
| 5482 | .state_renewal_ops = &nfs40_state_renewal_ops, |
| 5483 | }; |
| 5484 | |
| 5485 | #if defined(CONFIG_NFS_V4_1) |
| 5486 | static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { |
| 5487 | .minor_version = 1, |
| 5488 | .call_sync = _nfs4_call_sync_session, |
| 5489 | .validate_stateid = nfs41_validate_delegation_stateid, |
| 5490 | .reboot_recovery_ops = &nfs41_reboot_recovery_ops, |
| 5491 | .nograce_recovery_ops = &nfs41_nograce_recovery_ops, |
| 5492 | .state_renewal_ops = &nfs41_state_renewal_ops, |
| 5493 | }; |
| 5494 | #endif |
| 5495 | |
| 5496 | const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { |
| 5497 | [0] = &nfs_v4_0_minor_ops, |
| 5498 | #if defined(CONFIG_NFS_V4_1) |
| 5499 | [1] = &nfs_v4_1_minor_ops, |
| 5500 | #endif |
| 5501 | }; |
| 5502 | |
| 5503 | static const struct inode_operations nfs4_file_inode_operations = { |
| 5504 | .permission = nfs_permission, |
| 5505 | .getattr = nfs_getattr, |
| 5506 | .setattr = nfs_setattr, |
| 5507 | .getxattr = nfs4_getxattr, |
| 5508 | .setxattr = nfs4_setxattr, |
| 5509 | .listxattr = nfs4_listxattr, |
| 5510 | }; |
| 5511 | |
| 5512 | const struct nfs_rpc_ops nfs_v4_clientops = { |
| 5513 | .version = 4, /* protocol version */ |
| 5514 | .dentry_ops = &nfs4_dentry_operations, |
| 5515 | .dir_inode_ops = &nfs4_dir_inode_operations, |
| 5516 | .file_inode_ops = &nfs4_file_inode_operations, |
| 5517 | .getroot = nfs4_proc_get_root, |
| 5518 | .getattr = nfs4_proc_getattr, |
| 5519 | .setattr = nfs4_proc_setattr, |
| 5520 | .lookupfh = nfs4_proc_lookupfh, |
| 5521 | .lookup = nfs4_proc_lookup, |
| 5522 | .access = nfs4_proc_access, |
| 5523 | .readlink = nfs4_proc_readlink, |
| 5524 | .create = nfs4_proc_create, |
| 5525 | .remove = nfs4_proc_remove, |
| 5526 | .unlink_setup = nfs4_proc_unlink_setup, |
| 5527 | .unlink_done = nfs4_proc_unlink_done, |
| 5528 | .rename = nfs4_proc_rename, |
| 5529 | .rename_setup = nfs4_proc_rename_setup, |
| 5530 | .rename_done = nfs4_proc_rename_done, |
| 5531 | .link = nfs4_proc_link, |
| 5532 | .symlink = nfs4_proc_symlink, |
| 5533 | .mkdir = nfs4_proc_mkdir, |
| 5534 | .rmdir = nfs4_proc_remove, |
| 5535 | .readdir = nfs4_proc_readdir, |
| 5536 | .mknod = nfs4_proc_mknod, |
| 5537 | .statfs = nfs4_proc_statfs, |
| 5538 | .fsinfo = nfs4_proc_fsinfo, |
| 5539 | .pathconf = nfs4_proc_pathconf, |
| 5540 | .set_capabilities = nfs4_server_capabilities, |
| 5541 | .decode_dirent = nfs4_decode_dirent, |
| 5542 | .read_setup = nfs4_proc_read_setup, |
| 5543 | .read_done = nfs4_read_done, |
| 5544 | .write_setup = nfs4_proc_write_setup, |
| 5545 | .write_done = nfs4_write_done, |
| 5546 | .commit_setup = nfs4_proc_commit_setup, |
| 5547 | .commit_done = nfs4_commit_done, |
| 5548 | .lock = nfs4_proc_lock, |
| 5549 | .clear_acl_cache = nfs4_zap_acl_attr, |
| 5550 | .close_context = nfs4_close_context, |
| 5551 | .open_context = nfs4_atomic_open, |
| 5552 | }; |
| 5553 | |
| 5554 | /* |
| 5555 | * Local variables: |
| 5556 | * c-basic-offset: 8 |
| 5557 | * End: |
| 5558 | */ |