fs/nfs/nfs42proc.c

   1 /*
   2  * Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com>
   3  */
   4 #include <linux/fs.h>
   5 #include <linux/sunrpc/sched.h>
   6 #include <linux/nfs.h>
   7 #include <linux/nfs3.h>
   8 #include <linux/nfs4.h>
   9 #include <linux/nfs_xdr.h>
  10 #include <linux/nfs_fs.h>
  11 #include "nfs4_fs.h"
  12 #include "nfs42.h"
  13 #include "iostat.h"
  14 #include "pnfs.h"
  15 #include "internal.h"
  16
  17 #define NFSDBG_FACILITY NFSDBG_PROC
  18
  19 static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
  20                 struct nfs_lock_context *lock, loff_t offset, loff_t len)
  21 {
  22         struct inode *inode = file_inode(filep);
  23         struct nfs_server *server = NFS_SERVER(inode);
  24         struct nfs42_falloc_args args = {
  25                 .falloc_fh      = NFS_FH(inode),
  26                 .falloc_offset  = offset,
  27                 .falloc_length  = len,
  28                 .falloc_bitmask = server->cache_consistency_bitmask,
  29         };
  30         struct nfs42_falloc_res res = {
  31                 .falloc_server  = server,
  32         };
  33         int status;
  34
  35         msg->rpc_argp = &args;
  36         msg->rpc_resp = &res;
  37
  38         status = nfs4_set_rw_stateid(&args.falloc_stateid, lock->open_context,
  39                         lock, FMODE_WRITE);
  40         if (status)
  41                 return status;
  42
  43         res.falloc_fattr = nfs_alloc_fattr();
  44         if (!res.falloc_fattr)
  45                 return -ENOMEM;
  46
  47         status = nfs4_call_sync(server->client, server, msg,
  48                                 &args.seq_args, &res.seq_res, 0);
  49         if (status == 0)
  50                 status = nfs_post_op_update_inode(inode, res.falloc_fattr);
  51
  52         kfree(res.falloc_fattr);
  53         return status;
  54 }
  55
  56 static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
  57                                 loff_t offset, loff_t len)
  58 {
  59         struct nfs_server *server = NFS_SERVER(file_inode(filep));
  60         struct nfs4_exception exception = { };
  61         struct nfs_lock_context *lock;
  62         int err;
  63
  64         lock = nfs_get_lock_context(nfs_file_open_context(filep));
  65         if (IS_ERR(lock))
  66                 return PTR_ERR(lock);
  67
  68         exception.inode = file_inode(filep);
  69         exception.state = lock->open_context->state;
  70
  71         do {
  72                 err = _nfs42_proc_fallocate(msg, filep, lock, offset, len);
  73                 if (err == -ENOTSUPP) {
  74                         err = -EOPNOTSUPP;
  75                         break;
  76                 }
  77                 err = nfs4_handle_exception(server, err, &exception);
  78         } while (exception.retry);
  79
  80         nfs_put_lock_context(lock);
  81         return err;
  82 }
  83
  84 int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len)
  85 {
  86         struct rpc_message msg = {
  87                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE],
  88         };
  89         struct inode *inode = file_inode(filep);
  90         int err;
  91
  92         if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE))
  93                 return -EOPNOTSUPP;
  94
  95         inode_lock(inode);
  96
  97         err = nfs42_proc_fallocate(&msg, filep, offset, len);
  98         if (err == -EOPNOTSUPP)
  99                 NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE;
 100
 101         inode_unlock(inode);
 102         return err;
 103 }
 104
 105 int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len)
 106 {
 107         struct rpc_message msg = {
 108                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE],
 109         };
 110         struct inode *inode = file_inode(filep);
 111         int err;
 112
 113         if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE))
 114                 return -EOPNOTSUPP;
 115
 116         inode_lock(inode);
 117         err = nfs_sync_inode(inode);
 118         if (err)
 119                 goto out_unlock;
 120
 121         err = nfs42_proc_fallocate(&msg, filep, offset, len);
 122         if (err == 0)
 123                 truncate_pagecache_range(inode, offset, (offset + len) -1);
 124         if (err == -EOPNOTSUPP)
 125                 NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE;
 126 out_unlock:
 127         inode_unlock(inode);
 128         return err;
 129 }
 130
 131 static ssize_t _nfs42_proc_copy(struct file *src, loff_t pos_src,
 132                                 struct nfs_lock_context *src_lock,
 133                                 struct file *dst, loff_t pos_dst,
 134                                 struct nfs_lock_context *dst_lock,
 135                                 size_t count)
 136 {
 137         struct nfs42_copy_args args = {
 138                 .src_fh         = NFS_FH(file_inode(src)),
 139                 .src_pos        = pos_src,
 140                 .dst_fh         = NFS_FH(file_inode(dst)),
 141                 .dst_pos        = pos_dst,
 142                 .count          = count,
 143         };
 144         struct nfs42_copy_res res;
 145         struct rpc_message msg = {
 146                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY],
 147                 .rpc_argp = &args,
 148                 .rpc_resp = &res,
 149         };
 150         struct inode *dst_inode = file_inode(dst);
 151         struct nfs_server *server = NFS_SERVER(dst_inode);
 152         int status;
 153
 154         status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context,
 155                                      src_lock, FMODE_READ);
 156         if (status)
 157                 return status;
 158
 159         status = nfs_filemap_write_and_wait_range(file_inode(src)->i_mapping,
 160                         pos_src, pos_src + (loff_t)count - 1);
 161         if (status)
 162                 return status;
 163
 164         status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context,
 165                                      dst_lock, FMODE_WRITE);
 166         if (status)
 167                 return status;
 168
 169         status = nfs_sync_inode(dst_inode);
 170         if (status)
 171                 return status;
 172
 173         status = nfs4_call_sync(server->client, server, &msg,
 174                                 &args.seq_args, &res.seq_res, 0);
 175         if (status == -ENOTSUPP)
 176                 server->caps &= ~NFS_CAP_COPY;
 177         if (status)
 178                 return status;
 179
 180         if (res.write_res.verifier.committed != NFS_FILE_SYNC) {
 181                 status = nfs_commit_file(dst, &res.write_res.verifier.verifier);
 182                 if (status)
 183                         return status;
 184         }
 185
 186         truncate_pagecache_range(dst_inode, pos_dst,
 187                                  pos_dst + res.write_res.count);
 188
 189         return res.write_res.count;
 190 }
 191
 192 ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src,
 193                         struct file *dst, loff_t pos_dst,
 194                         size_t count)
 195 {
 196         struct nfs_server *server = NFS_SERVER(file_inode(dst));
 197         struct nfs_lock_context *src_lock;
 198         struct nfs_lock_context *dst_lock;
 199         struct nfs4_exception src_exception = { };
 200         struct nfs4_exception dst_exception = { };
 201         ssize_t err, err2;
 202
 203         if (!nfs_server_capable(file_inode(dst), NFS_CAP_COPY))
 204                 return -EOPNOTSUPP;
 205
 206         src_lock = nfs_get_lock_context(nfs_file_open_context(src));
 207         if (IS_ERR(src_lock))
 208                 return PTR_ERR(src_lock);
 209
 210         src_exception.inode = file_inode(src);
 211         src_exception.state = src_lock->open_context->state;
 212
 213         dst_lock = nfs_get_lock_context(nfs_file_open_context(dst));
 214         if (IS_ERR(dst_lock)) {
 215                 err = PTR_ERR(dst_lock);
 216                 goto out_put_src_lock;
 217         }
 218
 219         dst_exception.inode = file_inode(dst);
 220         dst_exception.state = dst_lock->open_context->state;
 221
 222         do {
 223                 inode_lock(file_inode(dst));
 224                 err = _nfs42_proc_copy(src, pos_src, src_lock,
 225                                        dst, pos_dst, dst_lock, count);
 226                 inode_unlock(file_inode(dst));
 227
 228                 if (err == -ENOTSUPP) {
 229                         err = -EOPNOTSUPP;
 230                         break;
 231                 }
 232
 233                 err2 = nfs4_handle_exception(server, err, &src_exception);
 234                 err  = nfs4_handle_exception(server, err, &dst_exception);
 235                 if (!err)
 236                         err = err2;
 237         } while (src_exception.retry || dst_exception.retry);
 238
 239         nfs_put_lock_context(dst_lock);
 240 out_put_src_lock:
 241         nfs_put_lock_context(src_lock);
 242         return err;
 243 }
 244
 245 static loff_t _nfs42_proc_llseek(struct file *filep,
 246                 struct nfs_lock_context *lock, loff_t offset, int whence)
 247 {
 248         struct inode *inode = file_inode(filep);
 249         struct nfs42_seek_args args = {
 250                 .sa_fh          = NFS_FH(inode),
 251                 .sa_offset      = offset,
 252                 .sa_what        = (whence == SEEK_HOLE) ?
 253                                         NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA,
 254         };
 255         struct nfs42_seek_res res;
 256         struct rpc_message msg = {
 257                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK],
 258                 .rpc_argp = &args,
 259                 .rpc_resp = &res,
 260         };
 261         struct nfs_server *server = NFS_SERVER(inode);
 262         int status;
 263
 264         if (!nfs_server_capable(inode, NFS_CAP_SEEK))
 265                 return -ENOTSUPP;
 266
 267         status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context,
 268                         lock, FMODE_READ);
 269         if (status)
 270                 return status;
 271
 272         status = nfs_filemap_write_and_wait_range(inode->i_mapping,
 273                         offset, LLONG_MAX);
 274         if (status)
 275                 return status;
 276
 277         status = nfs4_call_sync(server->client, server, &msg,
 278                                 &args.seq_args, &res.seq_res, 0);
 279         if (status == -ENOTSUPP)
 280                 server->caps &= ~NFS_CAP_SEEK;
 281         if (status)
 282                 return status;
 283
 284         return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes);
 285 }
 286
 287 loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
 288 {
 289         struct nfs_server *server = NFS_SERVER(file_inode(filep));
 290         struct nfs4_exception exception = { };
 291         struct nfs_lock_context *lock;
 292         loff_t err;
 293
 294         lock = nfs_get_lock_context(nfs_file_open_context(filep));
 295         if (IS_ERR(lock))
 296                 return PTR_ERR(lock);
 297
 298         exception.inode = file_inode(filep);
 299         exception.state = lock->open_context->state;
 300
 301         do {
 302                 err = _nfs42_proc_llseek(filep, lock, offset, whence);
 303                 if (err >= 0)
 304                         break;
 305                 if (err == -ENOTSUPP) {
 306                         err = -EOPNOTSUPP;
 307                         break;
 308                 }
 309                 err = nfs4_handle_exception(server, err, &exception);
 310         } while (exception.retry);
 311
 312         nfs_put_lock_context(lock);
 313         return err;
 314 }
 315
 316
 317 static void
 318 nfs42_layoutstat_prepare(struct rpc_task *task, void *calldata)
 319 {
 320         struct nfs42_layoutstat_data *data = calldata;
 321         struct nfs_server *server = NFS_SERVER(data->args.inode);
 322
 323         nfs41_setup_sequence(nfs4_get_session(server), &data->args.seq_args,
 324                              &data->res.seq_res, task);
 325 }
 326
 327 static void
 328 nfs42_layoutstat_done(struct rpc_task *task, void *calldata)
 329 {
 330         struct nfs42_layoutstat_data *data = calldata;
 331         struct inode *inode = data->inode;
 332         struct pnfs_layout_hdr *lo;
 333
 334         if (!nfs4_sequence_done(task, &data->res.seq_res))
 335                 return;
 336
 337         switch (task->tk_status) {
 338         case 0:
 339                 break;
 340         case -NFS4ERR_EXPIRED:
 341         case -NFS4ERR_STALE_STATEID:
 342         case -NFS4ERR_OLD_STATEID:
 343         case -NFS4ERR_BAD_STATEID:
 344                 spin_lock(&inode->i_lock);
 345                 lo = NFS_I(inode)->layout;
 346                 if (lo && nfs4_stateid_match(&data->args.stateid,
 347                                              &lo->plh_stateid)) {
 348                         LIST_HEAD(head);
 349
 350                         /*
 351                          * Mark the bad layout state as invalid, then retry
 352                          * with the current stateid.
 353                          */
 354                         pnfs_mark_layout_stateid_invalid(lo, &head);
 355                         spin_unlock(&inode->i_lock);
 356                         pnfs_free_lseg_list(&head);
 357                 } else
 358                         spin_unlock(&inode->i_lock);
 359                 break;
 360         case -ENOTSUPP:
 361         case -EOPNOTSUPP:
 362                 NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTSTATS;
 363         default:
 364                 break;
 365         }
 366
 367         dprintk("%s server returns %d\n", __func__, task->tk_status);
 368 }
 369
 370 static void
 371 nfs42_layoutstat_release(void *calldata)
 372 {
 373         struct nfs42_layoutstat_data *data = calldata;
 374         struct nfs_server *nfss = NFS_SERVER(data->args.inode);
 375
 376         if (nfss->pnfs_curr_ld->cleanup_layoutstats)
 377                 nfss->pnfs_curr_ld->cleanup_layoutstats(data);
 378
 379         pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout);
 380         smp_mb__before_atomic();
 381         clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags);
 382         smp_mb__after_atomic();
 383         nfs_iput_and_deactive(data->inode);
 384         kfree(data->args.devinfo);
 385         kfree(data);
 386 }
 387
 388 static const struct rpc_call_ops nfs42_layoutstat_ops = {
 389         .rpc_call_prepare = nfs42_layoutstat_prepare,
 390         .rpc_call_done = nfs42_layoutstat_done,
 391         .rpc_release = nfs42_layoutstat_release,
 392 };
 393
 394 int nfs42_proc_layoutstats_generic(struct nfs_server *server,
 395                                    struct nfs42_layoutstat_data *data)
 396 {
 397         struct rpc_message msg = {
 398                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS],
 399                 .rpc_argp = &data->args,
 400                 .rpc_resp = &data->res,
 401         };
 402         struct rpc_task_setup task_setup = {
 403                 .rpc_client = server->client,
 404                 .rpc_message = &msg,
 405                 .callback_ops = &nfs42_layoutstat_ops,
 406                 .callback_data = data,
 407                 .flags = RPC_TASK_ASYNC,
 408         };
 409         struct rpc_task *task;
 410
 411         data->inode = nfs_igrab_and_active(data->args.inode);
 412         if (!data->inode) {
 413                 nfs42_layoutstat_release(data);
 414                 return -EAGAIN;
 415         }
 416         nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
 417         task = rpc_run_task(&task_setup);
 418         if (IS_ERR(task))
 419                 return PTR_ERR(task);
 420         return 0;
 421 }
 422
 423 static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f,
 424                 struct file *dst_f, struct nfs_lock_context *src_lock,
 425                 struct nfs_lock_context *dst_lock, loff_t src_offset,
 426                 loff_t dst_offset, loff_t count)
 427 {
 428         struct inode *src_inode = file_inode(src_f);
 429         struct inode *dst_inode = file_inode(dst_f);
 430         struct nfs_server *server = NFS_SERVER(dst_inode);
 431         struct nfs42_clone_args args = {
 432                 .src_fh = NFS_FH(src_inode),
 433                 .dst_fh = NFS_FH(dst_inode),
 434                 .src_offset = src_offset,
 435                 .dst_offset = dst_offset,
 436                 .count = count,
 437                 .dst_bitmask = server->cache_consistency_bitmask,
 438         };
 439         struct nfs42_clone_res res = {
 440                 .server = server,
 441         };
 442         int status;
 443
 444         msg->rpc_argp = &args;
 445         msg->rpc_resp = &res;
 446
 447         status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context,
 448                         src_lock, FMODE_READ);
 449         if (status)
 450                 return status;
 451
 452         status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context,
 453                         dst_lock, FMODE_WRITE);
 454         if (status)
 455                 return status;
 456
 457         res.dst_fattr = nfs_alloc_fattr();
 458         if (!res.dst_fattr)
 459                 return -ENOMEM;
 460
 461         status = nfs4_call_sync(server->client, server, msg,
 462                                 &args.seq_args, &res.seq_res, 0);
 463         if (status == 0)
 464                 status = nfs_post_op_update_inode(dst_inode, res.dst_fattr);
 465
 466         kfree(res.dst_fattr);
 467         return status;
 468 }
 469
 470 int nfs42_proc_clone(struct file *src_f, struct file *dst_f,
 471                      loff_t src_offset, loff_t dst_offset, loff_t count)
 472 {
 473         struct rpc_message msg = {
 474                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE],
 475         };
 476         struct inode *inode = file_inode(src_f);
 477         struct nfs_server *server = NFS_SERVER(file_inode(src_f));
 478         struct nfs_lock_context *src_lock;
 479         struct nfs_lock_context *dst_lock;
 480         struct nfs4_exception src_exception = { };
 481         struct nfs4_exception dst_exception = { };
 482         int err, err2;
 483
 484         if (!nfs_server_capable(inode, NFS_CAP_CLONE))
 485                 return -EOPNOTSUPP;
 486
 487         src_lock = nfs_get_lock_context(nfs_file_open_context(src_f));
 488         if (IS_ERR(src_lock))
 489                 return PTR_ERR(src_lock);
 490
 491         src_exception.inode = file_inode(src_f);
 492         src_exception.state = src_lock->open_context->state;
 493
 494         dst_lock = nfs_get_lock_context(nfs_file_open_context(dst_f));
 495         if (IS_ERR(dst_lock)) {
 496                 err = PTR_ERR(dst_lock);
 497                 goto out_put_src_lock;
 498         }
 499
 500         dst_exception.inode = file_inode(dst_f);
 501         dst_exception.state = dst_lock->open_context->state;
 502
 503         do {
 504                 err = _nfs42_proc_clone(&msg, src_f, dst_f, src_lock, dst_lock,
 505                                         src_offset, dst_offset, count);
 506                 if (err == -ENOTSUPP || err == -EOPNOTSUPP) {
 507                         NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE;
 508                         err = -EOPNOTSUPP;
 509                         break;
 510                 }
 511
 512                 err2 = nfs4_handle_exception(server, err, &src_exception);
 513                 err = nfs4_handle_exception(server, err, &dst_exception);
 514                 if (!err)
 515                         err = err2;
 516         } while (src_exception.retry || dst_exception.retry);
 517
 518         nfs_put_lock_context(dst_lock);
 519 out_put_src_lock:
 520         nfs_put_lock_context(src_lock);
 521         return err;
 522 }