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staging: lustre: remove EXIT macro
[deliverable/linux.git] / drivers / staging / lustre / lustre / llite / dir.c
CommitLineData
d7e09d03
PT		 1/*
2 * GPL HEADER START
3 *
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
19 *
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
22 * have any questions.
23 *
24 * GPL HEADER END
25 */
26/*
27 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
29 *
30 * Copyright (c) 2011, 2012, Intel Corporation.
31 */
32/*
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
35 *
36 * lustre/llite/dir.c
37 *
38 * Directory code for lustre client.
39 */
40
41#include <linux/fs.h>
42#include <linux/pagemap.h>
43#include <linux/mm.h>
d7e09d03
PT		 44#include <asm/uaccess.h>
45#include <linux/buffer_head.h> // for wait_on_buffer
46#include <linux/pagevec.h>
2870cd10 47#include <linux/prefetch.h>
d7e09d03
PT		 48
49#define DEBUG_SUBSYSTEM S_LLITE
50
d7e09d03
PT		 51#include <obd_support.h>
52#include <obd_class.h>
53#include <lustre_lib.h>
54#include <lustre/lustre_idl.h>
55#include <lustre_lite.h>
56#include <lustre_dlm.h>
57#include <lustre_fid.h>
58#include "llite_internal.h"
59
60/*
61 * (new) readdir implementation overview.
62 *
63 * Original lustre readdir implementation cached exact copy of raw directory
64 * pages on the client. These pages were indexed in client page cache by
65 * logical offset in the directory file. This design, while very simple and
66 * intuitive had some inherent problems:
67 *
68 * . it implies that byte offset to the directory entry serves as a
69 * telldir(3)/seekdir(3) cookie, but that offset is not stable: in
70 * ext3/htree directory entries may move due to splits, and more
71 * importantly,
72 *
73 * . it is incompatible with the design of split directories for cmd3,
74 * that assumes that names are distributed across nodes based on their
75 * hash, and so readdir should be done in hash order.
76 *
77 * New readdir implementation does readdir in hash order, and uses hash of a
78 * file name as a telldir/seekdir cookie. This led to number of complications:
79 *
80 * . hash is not unique, so it cannot be used to index cached directory
81 * pages on the client (note, that it requires a whole pageful of hash
82 * collided entries to cause two pages to have identical hashes);
83 *
84 * . hash is not unique, so it cannot, strictly speaking, be used as an
85 * entry cookie. ext3/htree has the same problem and lustre implementation
86 * mimics their solution: seekdir(hash) positions directory at the first
87 * entry with the given hash.
88 *
89 * Client side.
90 *
91 * 0. caching
92 *
93 * Client caches directory pages using hash of the first entry as an index. As
94 * noted above hash is not unique, so this solution doesn't work as is:
95 * special processing is needed for "page hash chains" (i.e., sequences of
96 * pages filled with entries all having the same hash value).
97 *
98 * First, such chains have to be detected. To this end, server returns to the
99 * client the hash of the first entry on the page next to one returned. When
100 * client detects that this hash is the same as hash of the first entry on the
101 * returned page, page hash collision has to be handled. Pages in the
102 * hash chain, except first one, are termed "overflow pages".
103 *
104 * Solution to index uniqueness problem is to not cache overflow
105 * pages. Instead, when page hash collision is detected, all overflow pages
106 * from emerging chain are immediately requested from the server and placed in
107 * a special data structure (struct ll_dir_chain). This data structure is used
108 * by ll_readdir() to process entries from overflow pages. When readdir
109 * invocation finishes, overflow pages are discarded. If page hash collision
110 * chain weren't completely processed, next call to readdir will again detect
111 * page hash collision, again read overflow pages in, process next portion of
112 * entries and again discard the pages. This is not as wasteful as it looks,
113 * because, given reasonable hash, page hash collisions are extremely rare.
114 *
115 * 1. directory positioning
116 *
117 * When seekdir(hash) is called, original
118 *
119 *
120 *
121 *
122 *
123 *
124 *
125 *
126 * Server.
127 *
128 * identification of and access to overflow pages
129 *
130 * page format
131 *
132 * Page in MDS_READPAGE RPC is packed in LU_PAGE_SIZE, and each page contains
133 * a header lu_dirpage which describes the start/end hash, and whether this
134 * page is empty (contains no dir entry) or hash collide with next page.
135 * After client receives reply, several pages will be integrated into dir page
136 * in PAGE_CACHE_SIZE (if PAGE_CACHE_SIZE greater than LU_PAGE_SIZE), and the
137 * lu_dirpage for this integrated page will be adjusted. See
138 * lmv_adjust_dirpages().
139 *
140 */
141
142/* returns the page unlocked, but with a reference */
143static int ll_dir_filler(void *_hash, struct page *page0)
144{
145 struct inode *inode = page0->mapping->host;
146 int hash64 = ll_i2sbi(inode)->ll_flags & LL_SBI_64BIT_HASH;
147 struct obd_export *exp = ll_i2sbi(inode)->ll_md_exp;
148 struct ptlrpc_request *request;
149 struct mdt_body *body;
150 struct md_op_data *op_data;
151 __u64 hash = *((__u64 *)_hash);
152 struct page **page_pool;
153 struct page *page;
154 struct lu_dirpage *dp;
155 int max_pages = ll_i2sbi(inode)->ll_md_brw_size >> PAGE_CACHE_SHIFT;
156 int nrdpgs = 0; /* number of pages read actually */
157 int npages;
158 int i;
159 int rc;
d7e09d03
PT		 160
161 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p) hash "LPU64"\n",
162 inode->i_ino, inode->i_generation, inode, hash);
163
164 LASSERT(max_pages > 0 && max_pages <= MD_MAX_BRW_PAGES);
165
166 OBD_ALLOC(page_pool, sizeof(page) * max_pages);
167 if (page_pool != NULL) {
168 page_pool[0] = page0;
169 } else {
170 page_pool = &page0;
171 max_pages = 1;
172 }
173 for (npages = 1; npages < max_pages; npages++) {
174 page = page_cache_alloc_cold(inode->i_mapping);
175 if (!page)
176 break;
177 page_pool[npages] = page;
178 }
179
180 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
181 LUSTRE_OPC_ANY, NULL);
182 op_data->op_npages = npages;
183 op_data->op_offset = hash;
184 rc = md_readpage(exp, op_data, page_pool, &request);
185 ll_finish_md_op_data(op_data);
186 if (rc == 0) {
187 body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
188 /* Checked by mdc_readpage() */
189 LASSERT(body != NULL);
190
191 if (body->valid & OBD_MD_FLSIZE)
192 cl_isize_write(inode, body->size);
193
194 nrdpgs = (request->rq_bulk->bd_nob_transferred+PAGE_CACHE_SIZE-1)
195 >> PAGE_CACHE_SHIFT;
196 SetPageUptodate(page0);
197 }
198 unlock_page(page0);
199 ptlrpc_req_finished(request);
200
201 CDEBUG(D_VFSTRACE, "read %d/%d pages\n", nrdpgs, npages);
202
203 ll_pagevec_init(&lru_pvec, 0);
204 for (i = 1; i < npages; i++) {
205 unsigned long offset;
206 int ret;
207
208 page = page_pool[i];
209
210 if (rc < 0 || i >= nrdpgs) {
211 page_cache_release(page);
212 continue;
213 }
214
215 SetPageUptodate(page);
216
217 dp = kmap(page);
218 hash = le64_to_cpu(dp->ldp_hash_start);
219 kunmap(page);
220
221 offset = hash_x_index(hash, hash64);
222
223 prefetchw(&page->flags);
224 ret = add_to_page_cache_lru(page, inode->i_mapping, offset,
225 GFP_KERNEL);
226 if (ret == 0) {
227 unlock_page(page);
228 if (ll_pagevec_add(&lru_pvec, page) == 0)
229 ll_pagevec_lru_add_file(&lru_pvec);
230 } else {
231 CDEBUG(D_VFSTRACE, "page %lu add to page cache failed:"
232 " %d\n", offset, ret);
233 }
234 page_cache_release(page);
235 }
236 ll_pagevec_lru_add_file(&lru_pvec);
237
238 if (page_pool != &page0)
239 OBD_FREE(page_pool, sizeof(struct page *) * max_pages);
d7e09d03
PT		 240 return rc;
241}
242
243static void ll_check_page(struct inode *dir, struct page *page)
244{
245 /* XXX: check page format later */
246 SetPageChecked(page);
247}
248
249void ll_release_page(struct page *page, int remove)
250{
251 kunmap(page);
252 if (remove) {
253 lock_page(page);
254 if (likely(page->mapping != NULL))
255 truncate_complete_page(page->mapping, page);
256 unlock_page(page);
257 }
258 page_cache_release(page);
259}
260
261/*
262 * Find, kmap and return page that contains given hash.
263 */
264static struct page *ll_dir_page_locate(struct inode *dir, __u64 *hash,
265 __u64 *start, __u64 *end)
266{
267 int hash64 = ll_i2sbi(dir)->ll_flags & LL_SBI_64BIT_HASH;
268 struct address_space *mapping = dir->i_mapping;
269 /*
270 * Complement of hash is used as an index so that
271 * radix_tree_gang_lookup() can be used to find a page with starting
272 * hash _smaller_ than one we are looking for.
273 */
274 unsigned long offset = hash_x_index(*hash, hash64);
275 struct page *page;
276 int found;
277
278 TREE_READ_LOCK_IRQ(mapping);
279 found = radix_tree_gang_lookup(&mapping->page_tree,
280 (void **)&page, offset, 1);
281 if (found > 0) {
282 struct lu_dirpage *dp;
283
284 page_cache_get(page);
285 TREE_READ_UNLOCK_IRQ(mapping);
286 /*
287 * In contrast to find_lock_page() we are sure that directory
288 * page cannot be truncated (while DLM lock is held) and,
289 * hence, can avoid restart.
290 *
291 * In fact, page cannot be locked here at all, because
292 * ll_dir_filler() does synchronous io.
293 */
294 wait_on_page_locked(page);
295 if (PageUptodate(page)) {
296 dp = kmap(page);
297 if (BITS_PER_LONG == 32 && hash64) {
298 *start = le64_to_cpu(dp->ldp_hash_start) >> 32;
299 *end = le64_to_cpu(dp->ldp_hash_end) >> 32;
300 *hash = *hash >> 32;
301 } else {
302 *start = le64_to_cpu(dp->ldp_hash_start);
303 *end = le64_to_cpu(dp->ldp_hash_end);
304 }
305 LASSERTF(*start <= *hash, "start = "LPX64",end = "
306 LPX64",hash = "LPX64"\n", *start, *end, *hash);
307 CDEBUG(D_VFSTRACE, "page %lu [%llu %llu], hash "LPU64"\n",
308 offset, *start, *end, *hash);
309 if (*hash > *end) {
310 ll_release_page(page, 0);
311 page = NULL;
312 } else if (*end != *start && *hash == *end) {
313 /*
314 * upon hash collision, remove this page,
315 * otherwise put page reference, and
316 * ll_get_dir_page() will issue RPC to fetch
317 * the page we want.
318 */
319 ll_release_page(page,
320 le32_to_cpu(dp->ldp_flags) & LDF_COLLIDE);
321 page = NULL;
322 }
323 } else {
324 page_cache_release(page);
325 page = ERR_PTR(-EIO);
326 }
327
328 } else {
329 TREE_READ_UNLOCK_IRQ(mapping);
330 page = NULL;
331 }
332 return page;
333}
334
335struct page *ll_get_dir_page(struct inode *dir, __u64 hash,
336 struct ll_dir_chain *chain)
337{
338 ldlm_policy_data_t policy = {.l_inodebits = {MDS_INODELOCK_UPDATE} };
339 struct address_space *mapping = dir->i_mapping;
340 struct lustre_handle lockh;
341 struct lu_dirpage *dp;
342 struct page *page;
343 ldlm_mode_t mode;
344 int rc;
345 __u64 start = 0;
346 __u64 end = 0;
347 __u64 lhash = hash;
348 struct ll_inode_info *lli = ll_i2info(dir);
349 int hash64 = ll_i2sbi(dir)->ll_flags & LL_SBI_64BIT_HASH;
350
351 mode = LCK_PR;
352 rc = md_lock_match(ll_i2sbi(dir)->ll_md_exp, LDLM_FL_BLOCK_GRANTED,
353 ll_inode2fid(dir), LDLM_IBITS, &policy, mode, &lockh);
354 if (!rc) {
f2145eae
BK		 355 struct ldlm_enqueue_info einfo = {
356 .ei_type = LDLM_IBITS,
357 .ei_mode = mode,
358 .ei_cb_bl = ll_md_blocking_ast,
359 .ei_cb_cp = ldlm_completion_ast,
360 };
d7e09d03
PT		 361 struct lookup_intent it = { .it_op = IT_READDIR };
362 struct ptlrpc_request *request;
363 struct md_op_data *op_data;
364
365 op_data = ll_prep_md_op_data(NULL, dir, NULL, NULL, 0, 0,
366 LUSTRE_OPC_ANY, NULL);
367 if (IS_ERR(op_data))
368 return (void *)op_data;
369
370 rc = md_enqueue(ll_i2sbi(dir)->ll_md_exp, &einfo, &it,
371 op_data, &lockh, NULL, 0, NULL, 0);
372
373 ll_finish_md_op_data(op_data);
374
375 request = (struct ptlrpc_request *)it.d.lustre.it_data;
376 if (request)
377 ptlrpc_req_finished(request);
378 if (rc < 0) {
379 CERROR("lock enqueue: "DFID" at "LPU64": rc %d\n",
380 PFID(ll_inode2fid(dir)), hash, rc);
381 return ERR_PTR(rc);
382 }
383
384 CDEBUG(D_INODE, "setting lr_lvb_inode to inode %p (%lu/%u)\n",
385 dir, dir->i_ino, dir->i_generation);
386 md_set_lock_data(ll_i2sbi(dir)->ll_md_exp,
387 &it.d.lustre.it_lock_handle, dir, NULL);
388 } else {
389 /* for cross-ref object, l_ast_data of the lock may not be set,
390 * we reset it here */
391 md_set_lock_data(ll_i2sbi(dir)->ll_md_exp, &lockh.cookie,
392 dir, NULL);
393 }
394 ldlm_lock_dump_handle(D_OTHER, &lockh);
395
396 mutex_lock(&lli->lli_readdir_mutex);
397 page = ll_dir_page_locate(dir, &lhash, &start, &end);
398 if (IS_ERR(page)) {
399 CERROR("dir page locate: "DFID" at "LPU64": rc %ld\n",
400 PFID(ll_inode2fid(dir)), lhash, PTR_ERR(page));
401 GOTO(out_unlock, page);
402 } else if (page != NULL) {
403 /*
404 * XXX nikita: not entirely correct handling of a corner case:
405 * suppose hash chain of entries with hash value HASH crosses
406 * border between pages P0 and P1. First both P0 and P1 are
407 * cached, seekdir() is called for some entry from the P0 part
408 * of the chain. Later P0 goes out of cache. telldir(HASH)
409 * happens and finds P1, as it starts with matching hash
410 * value. Remaining entries from P0 part of the chain are
411 * skipped. (Is that really a bug?)
412 *
413 * Possible solutions: 0. don't cache P1 is such case, handle
414 * it as an "overflow" page. 1. invalidate all pages at
415 * once. 2. use HASH|1 as an index for P1.
416 */
417 GOTO(hash_collision, page);
418 }
419
420 page = read_cache_page(mapping, hash_x_index(hash, hash64),
421 ll_dir_filler, &lhash);
422 if (IS_ERR(page)) {
423 CERROR("read cache page: "DFID" at "LPU64": rc %ld\n",
424 PFID(ll_inode2fid(dir)), hash, PTR_ERR(page));
425 GOTO(out_unlock, page);
426 }
427
428 wait_on_page_locked(page);
429 (void)kmap(page);
430 if (!PageUptodate(page)) {
431 CERROR("page not updated: "DFID" at "LPU64": rc %d\n",
432 PFID(ll_inode2fid(dir)), hash, -5);
433 goto fail;
434 }
435 if (!PageChecked(page))
436 ll_check_page(dir, page);
437 if (PageError(page)) {
438 CERROR("page error: "DFID" at "LPU64": rc %d\n",
439 PFID(ll_inode2fid(dir)), hash, -5);
440 goto fail;
441 }
442hash_collision:
443 dp = page_address(page);
444 if (BITS_PER_LONG == 32 && hash64) {
445 start = le64_to_cpu(dp->ldp_hash_start) >> 32;
446 end = le64_to_cpu(dp->ldp_hash_end) >> 32;
447 lhash = hash >> 32;
448 } else {
449 start = le64_to_cpu(dp->ldp_hash_start);
450 end = le64_to_cpu(dp->ldp_hash_end);
451 lhash = hash;
452 }
453 if (end == start) {
454 LASSERT(start == lhash);
455 CWARN("Page-wide hash collision: "LPU64"\n", end);
456 if (BITS_PER_LONG == 32 && hash64)
457 CWARN("Real page-wide hash collision at ["LPU64" "LPU64
458 "] with hash "LPU64"\n",
459 le64_to_cpu(dp->ldp_hash_start),
460 le64_to_cpu(dp->ldp_hash_end), hash);
461 /*
462 * Fetch whole overflow chain...
463 *
464 * XXX not yet.
465 */
466 goto fail;
467 }
468out_unlock:
469 mutex_unlock(&lli->lli_readdir_mutex);
470 ldlm_lock_decref(&lockh, mode);
471 return page;
472
473fail:
474 ll_release_page(page, 1);
475 page = ERR_PTR(-EIO);
476 goto out_unlock;
477}
478
0b09d381 479int ll_dir_read(struct inode *inode, struct dir_context *ctx)
d7e09d03
PT		 480{
481 struct ll_inode_info *info = ll_i2info(inode);
482 struct ll_sb_info *sbi = ll_i2sbi(inode);
0b09d381 483 __u64 pos = ctx->pos;
d7e09d03
PT		 484 int api32 = ll_need_32bit_api(sbi);
485 int hash64 = sbi->ll_flags & LL_SBI_64BIT_HASH;
486 struct page *page;
487 struct ll_dir_chain chain;
488 int done = 0;
489 int rc = 0;
d7e09d03
PT		 490
491 ll_dir_chain_init(&chain);
492
493 page = ll_get_dir_page(inode, pos, &chain);
494
495 while (rc == 0 && !done) {
496 struct lu_dirpage *dp;
497 struct lu_dirent *ent;
498
499 if (!IS_ERR(page)) {
500 /*
501 * If page is empty (end of directory is reached),
502 * use this value.
503 */
504 __u64 hash = MDS_DIR_END_OFF;
505 __u64 next;
506
507 dp = page_address(page);
508 for (ent = lu_dirent_start(dp); ent != NULL && !done;
509 ent = lu_dirent_next(ent)) {
510 __u16 type;
511 int namelen;
512 struct lu_fid fid;
513 __u64 lhash;
514 __u64 ino;
515
516 /*
517 * XXX: implement correct swabbing here.
518 */
519
520 hash = le64_to_cpu(ent->lde_hash);
521 if (hash < pos)
522 /*
523 * Skip until we find target hash
524 * value.
525 */
526 continue;
527
528 namelen = le16_to_cpu(ent->lde_namelen);
529 if (namelen == 0)
530 /*
531 * Skip dummy record.
532 */
533 continue;
534
535 if (api32 && hash64)
536 lhash = hash >> 32;
537 else
538 lhash = hash;
539 fid_le_to_cpu(&fid, &ent->lde_fid);
540 ino = cl_fid_build_ino(&fid, api32);
541 type = ll_dirent_type_get(ent);
0b09d381 542 ctx->pos = lhash;
d7e09d03
PT		 543 /* For 'll_nfs_get_name_filldir()', it will try
544 * to access the 'ent' through its 'lde_name',
0b09d381
PT		 545 * so the parameter 'name' for 'ctx->actor()'
546 * must be part of the 'ent'.
547 */
548 done = !dir_emit(ctx, ent->lde_name,
549 namelen, ino, type);
d7e09d03
PT		 550 }
551 next = le64_to_cpu(dp->ldp_hash_end);
552 if (!done) {
553 pos = next;
554 if (pos == MDS_DIR_END_OFF) {
555 /*
556 * End of directory reached.
557 */
558 done = 1;
559 ll_release_page(page, 0);
560 } else if (1 /* chain is exhausted*/) {
561 /*
562 * Normal case: continue to the next
563 * page.
564 */
565 ll_release_page(page,
566 le32_to_cpu(dp->ldp_flags) &
567 LDF_COLLIDE);
568 next = pos;
569 page = ll_get_dir_page(inode, pos,
570 &chain);
571 } else {
572 /*
573 * go into overflow page.
574 */
575 LASSERT(le32_to_cpu(dp->ldp_flags) &
576 LDF_COLLIDE);
577 ll_release_page(page, 1);
578 }
579 } else {
580 pos = hash;
581 ll_release_page(page, 0);
582 }
583 } else {
584 rc = PTR_ERR(page);
585 CERROR("error reading dir "DFID" at %lu: rc %d\n",
586 PFID(&info->lli_fid), (unsigned long)pos, rc);
587 }
588 }
589
0b09d381 590 ctx->pos = pos;
d7e09d03
PT		 591 ll_dir_chain_fini(&chain);
592 RETURN(rc);
593}
594
0b09d381 595static int ll_readdir(struct file *filp, struct dir_context *ctx)
d7e09d03
PT		 596{
597 struct inode *inode = filp->f_dentry->d_inode;
598 struct ll_file_data *lfd = LUSTRE_FPRIVATE(filp);
599 struct ll_sb_info *sbi = ll_i2sbi(inode);
d7e09d03
PT		 600 int hash64 = sbi->ll_flags & LL_SBI_64BIT_HASH;
601 int api32 = ll_need_32bit_api(sbi);
602 int rc;
d7e09d03
PT		 603
604 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p) pos %lu/%llu "
605 " 32bit_api %d\n", inode->i_ino, inode->i_generation,
0b09d381 606 inode, (unsigned long)lfd->lfd_pos, i_size_read(inode), api32);
d7e09d03 607
0b09d381 608 if (lfd->lfd_pos == MDS_DIR_END_OFF)
d7e09d03
PT		 609 /*
610 * end-of-file.
611 */
612 GOTO(out, rc = 0);
613
0b09d381
PT		 614 ctx->pos = lfd->lfd_pos;
615 rc = ll_dir_read(inode, ctx);
616 lfd->lfd_pos = ctx->pos;
617 if (ctx->pos == MDS_DIR_END_OFF) {
d7e09d03 618 if (api32)
0b09d381 619 ctx->pos = LL_DIR_END_OFF_32BIT;
d7e09d03 620 else
0b09d381 621 ctx->pos = LL_DIR_END_OFF;
d7e09d03
PT		 622 } else {
623 if (api32 && hash64)
0b09d381 624 ctx->pos >>= 32;
d7e09d03
PT		 625 }
626 filp->f_version = inode->i_version;
d7e09d03
PT		 627
628out:
629 if (!rc)
630 ll_stats_ops_tally(sbi, LPROC_LL_READDIR, 1);
631
632 RETURN(rc);
633}
634
635int ll_send_mgc_param(struct obd_export *mgc, char *string)
636{
637 struct mgs_send_param *msp;
638 int rc = 0;
639
640 OBD_ALLOC_PTR(msp);
641 if (!msp)
642 return -ENOMEM;
643
644 strncpy(msp->mgs_param, string, MGS_PARAM_MAXLEN);
645 rc = obd_set_info_async(NULL, mgc, sizeof(KEY_SET_INFO), KEY_SET_INFO,
646 sizeof(struct mgs_send_param), msp, NULL);
647 if (rc)
648 CERROR("Failed to set parameter: %d\n", rc);
649 OBD_FREE_PTR(msp);
650
651 return rc;
652}
653
654int ll_dir_setdirstripe(struct inode *dir, struct lmv_user_md *lump,
655 char *filename)
656{
657 struct ptlrpc_request *request = NULL;
658 struct md_op_data *op_data;
659 struct ll_sb_info *sbi = ll_i2sbi(dir);
660 int mode;
661 int err;
662
d7e09d03
PT		 663 mode = (0755 & (S_IRWXUGO|S_ISVTX) & ~current->fs->umask) | S_IFDIR;
664 op_data = ll_prep_md_op_data(NULL, dir, NULL, filename,
665 strlen(filename), mode, LUSTRE_OPC_MKDIR,
666 lump);
667 if (IS_ERR(op_data))
668 GOTO(err_exit, err = PTR_ERR(op_data));
669
670 op_data->op_cli_flags |= CLI_SET_MEA;
671 err = md_create(sbi->ll_md_exp, op_data, lump, sizeof(*lump), mode,
4b1a25f0
PT		 672 from_kuid(&init_user_ns, current_fsuid()),
673 from_kgid(&init_user_ns, current_fsgid()),
d7e09d03
PT		 674 cfs_curproc_cap_pack(), 0, &request);
675 ll_finish_md_op_data(op_data);
676 if (err)
677 GOTO(err_exit, err);
678err_exit:
679 ptlrpc_req_finished(request);
680 return err;
681}
682
683int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
684 int set_default)
685{
686 struct ll_sb_info *sbi = ll_i2sbi(inode);
687 struct md_op_data *op_data;
688 struct ptlrpc_request *req = NULL;
689 int rc = 0;
690 struct lustre_sb_info *lsi = s2lsi(inode->i_sb);
691 struct obd_device *mgc = lsi->lsi_mgc;
692 int lum_size;
d7e09d03
PT		 693
694 if (lump != NULL) {
695 /*
696 * This is coming from userspace, so should be in
697 * local endian. But the MDS would like it in little
698 * endian, so we swab it before we send it.
699 */
700 switch (lump->lmm_magic) {
701 case LOV_USER_MAGIC_V1: {
702 if (lump->lmm_magic != cpu_to_le32(LOV_USER_MAGIC_V1))
703 lustre_swab_lov_user_md_v1(lump);
704 lum_size = sizeof(struct lov_user_md_v1);
705 break;
706 }
707 case LOV_USER_MAGIC_V3: {
708 if (lump->lmm_magic != cpu_to_le32(LOV_USER_MAGIC_V3))
709 lustre_swab_lov_user_md_v3(
710 (struct lov_user_md_v3 *)lump);
711 lum_size = sizeof(struct lov_user_md_v3);
712 break;
713 }
714 default: {
715 CDEBUG(D_IOCTL, "bad userland LOV MAGIC:"
716 " %#08x != %#08x nor %#08x\n",
717 lump->lmm_magic, LOV_USER_MAGIC_V1,
718 LOV_USER_MAGIC_V3);
719 RETURN(-EINVAL);
720 }
721 }
722 } else {
723 lum_size = sizeof(struct lov_user_md_v1);
724 }
725
726 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
727 LUSTRE_OPC_ANY, NULL);
728 if (IS_ERR(op_data))
729 RETURN(PTR_ERR(op_data));
730
731 if (lump != NULL && lump->lmm_magic == cpu_to_le32(LMV_USER_MAGIC))
732 op_data->op_cli_flags |= CLI_SET_MEA;
733
734 /* swabbing is done in lov_setstripe() on server side */
735 rc = md_setattr(sbi->ll_md_exp, op_data, lump, lum_size,
736 NULL, 0, &req, NULL);
737 ll_finish_md_op_data(op_data);
738 ptlrpc_req_finished(req);
739 if (rc) {
740 if (rc != -EPERM && rc != -EACCES)
741 CERROR("mdc_setattr fails: rc = %d\n", rc);
742 }
743
744 /* In the following we use the fact that LOV_USER_MAGIC_V1 and
745 LOV_USER_MAGIC_V3 have the same initial fields so we do not
746 need the make the distiction between the 2 versions */
747 if (set_default && mgc->u.cli.cl_mgc_mgsexp) {
748 char *param = NULL;
749 char *buf;
750
751 OBD_ALLOC(param, MGS_PARAM_MAXLEN);
752 if (param == NULL)
753 GOTO(end, rc = -ENOMEM);
754
755 buf = param;
756 /* Get fsname and assume devname to be -MDT0000. */
757 ll_get_fsname(inode->i_sb, buf, MTI_NAME_MAXLEN);
758 strcat(buf, "-MDT0000.lov");
759 buf += strlen(buf);
760
761 /* Set root stripesize */
762 sprintf(buf, ".stripesize=%u",
763 lump ? le32_to_cpu(lump->lmm_stripe_size) : 0);
764 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
765 if (rc)
766 GOTO(end, rc);
767
768 /* Set root stripecount */
769 sprintf(buf, ".stripecount=%hd",
770 lump ? le16_to_cpu(lump->lmm_stripe_count) : 0);
771 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
772 if (rc)
773 GOTO(end, rc);
774
775 /* Set root stripeoffset */
776 sprintf(buf, ".stripeoffset=%hd",
777 lump ? le16_to_cpu(lump->lmm_stripe_offset) :
778 (typeof(lump->lmm_stripe_offset))(-1));
779 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
780
781end:
782 if (param != NULL)
783 OBD_FREE(param, MGS_PARAM_MAXLEN);
784 }
785 RETURN(rc);
786}
787
788int ll_dir_getstripe(struct inode *inode, struct lov_mds_md **lmmp,
789 int *lmm_size, struct ptlrpc_request **request)
790{
791 struct ll_sb_info *sbi = ll_i2sbi(inode);
792 struct mdt_body *body;
793 struct lov_mds_md *lmm = NULL;
794 struct ptlrpc_request *req = NULL;
795 int rc, lmmsize;
796 struct md_op_data *op_data;
797
798 rc = ll_get_max_mdsize(sbi, &lmmsize);
799 if (rc)
800 RETURN(rc);
801
802 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
803 0, lmmsize, LUSTRE_OPC_ANY,
804 NULL);
805 if (IS_ERR(op_data))
806 RETURN(PTR_ERR(op_data));
807
808 op_data->op_valid = OBD_MD_FLEASIZE | OBD_MD_FLDIREA;
809 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
810 ll_finish_md_op_data(op_data);
811 if (rc < 0) {
812 CDEBUG(D_INFO, "md_getattr failed on inode "
813 "%lu/%u: rc %d\n", inode->i_ino,
814 inode->i_generation, rc);
815 GOTO(out, rc);
816 }
817
818 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
819 LASSERT(body != NULL);
820
821 lmmsize = body->eadatasize;
822
823 if (!(body->valid & (OBD_MD_FLEASIZE | OBD_MD_FLDIREA)) ||
824 lmmsize == 0) {
825 GOTO(out, rc = -ENODATA);
826 }
827
828 lmm = req_capsule_server_sized_get(&req->rq_pill,
829 &RMF_MDT_MD, lmmsize);
830 LASSERT(lmm != NULL);
831
832 /*
833 * This is coming from the MDS, so is probably in
834 * little endian. We convert it to host endian before
835 * passing it to userspace.
836 */
837 /* We don't swab objects for directories */
838 switch (le32_to_cpu(lmm->lmm_magic)) {
839 case LOV_MAGIC_V1:
840 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
841 lustre_swab_lov_user_md_v1((struct lov_user_md_v1 *)lmm);
842 break;
843 case LOV_MAGIC_V3:
844 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
845 lustre_swab_lov_user_md_v3((struct lov_user_md_v3 *)lmm);
846 break;
847 default:
848 CERROR("unknown magic: %lX\n", (unsigned long)lmm->lmm_magic);
849 rc = -EPROTO;
850 }
851out:
852 *lmmp = lmm;
853 *lmm_size = lmmsize;
854 *request = req;
855 return rc;
856}
857
858/*
859 * Get MDT index for the inode.
860 */
861int ll_get_mdt_idx(struct inode *inode)
862{
863 struct ll_sb_info *sbi = ll_i2sbi(inode);
864 struct md_op_data *op_data;
865 int rc, mdtidx;
d7e09d03
PT		 866
867 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0,
868 0, LUSTRE_OPC_ANY, NULL);
869 if (IS_ERR(op_data))
870 RETURN(PTR_ERR(op_data));
871
872 op_data->op_flags |= MF_GET_MDT_IDX;
873 rc = md_getattr(sbi->ll_md_exp, op_data, NULL);
874 mdtidx = op_data->op_mds;
875 ll_finish_md_op_data(op_data);
876 if (rc < 0) {
877 CDEBUG(D_INFO, "md_getattr_name: %d\n", rc);
878 RETURN(rc);
879 }
880 return mdtidx;
881}
882
883/**
884 * Generic handler to do any pre-copy work.
885 *
886 * It send a first hsm_progress (with extent length == 0) to coordinator as a
887 * first information for it that real work has started.
888 *
889 * Moreover, for a ARCHIVE request, it will sample the file data version and
890 * store it in \a copy.
891 *
892 * \return 0 on success.
893 */
894static int ll_ioc_copy_start(struct super_block *sb, struct hsm_copy *copy)
895{
896 struct ll_sb_info *sbi = ll_s2sbi(sb);
897 struct hsm_progress_kernel hpk;
898 int rc;
d7e09d03
PT		 899
900 /* Forge a hsm_progress based on data from copy. */
901 hpk.hpk_fid = copy->hc_hai.hai_fid;
902 hpk.hpk_cookie = copy->hc_hai.hai_cookie;
903 hpk.hpk_extent.offset = copy->hc_hai.hai_extent.offset;
904 hpk.hpk_extent.length = 0;
905 hpk.hpk_flags = 0;
906 hpk.hpk_errval = 0;
907 hpk.hpk_data_version = 0;
908
909
910 /* For archive request, we need to read the current file version. */
911 if (copy->hc_hai.hai_action == HSMA_ARCHIVE) {
912 struct inode *inode;
913 __u64 data_version = 0;
914
915 /* Get inode for this fid */
916 inode = search_inode_for_lustre(sb, &copy->hc_hai.hai_fid);
917 if (IS_ERR(inode)) {
918 hpk.hpk_flags |= HP_FLAG_RETRY;
919 /* hpk_errval is >= 0 */
920 hpk.hpk_errval = -PTR_ERR(inode);
921 GOTO(progress, rc = PTR_ERR(inode));
922 }
923
924 /* Read current file data version */
925 rc = ll_data_version(inode, &data_version, 1);
926 iput(inode);
927 if (rc != 0) {
928 CDEBUG(D_HSM, "Could not read file data version of "
929 DFID" (rc = %d). Archive request ("
930 LPX64") could not be done.\n",
931 PFID(&copy->hc_hai.hai_fid), rc,
932 copy->hc_hai.hai_cookie);
933 hpk.hpk_flags |= HP_FLAG_RETRY;
934 /* hpk_errval must be >= 0 */
935 hpk.hpk_errval = -rc;
936 GOTO(progress, rc);
937 }
938
939 /* Store it the hsm_copy for later copytool use.
940 * Always modified even if no lsm. */
941 copy->hc_data_version = data_version;
942 }
943
944progress:
945 rc = obd_iocontrol(LL_IOC_HSM_PROGRESS, sbi->ll_md_exp, sizeof(hpk),
946 &hpk, NULL);
947
948 RETURN(rc);
949}
950
951/**
952 * Generic handler to do any post-copy work.
953 *
954 * It will send the last hsm_progress update to coordinator to inform it
955 * that copy is finished and whether it was successful or not.
956 *
957 * Moreover,
958 * - for ARCHIVE request, it will sample the file data version and compare it
959 * with the version saved in ll_ioc_copy_start(). If they do not match, copy
960 * will be considered as failed.
961 * - for RESTORE request, it will sample the file data version and send it to
962 * coordinator which is useful if the file was imported as 'released'.
963 *
964 * \return 0 on success.
965 */
966static int ll_ioc_copy_end(struct super_block *sb, struct hsm_copy *copy)
967{
968 struct ll_sb_info *sbi = ll_s2sbi(sb);
969 struct hsm_progress_kernel hpk;
970 int rc;
d7e09d03
PT		 971
972 /* If you modify the logic here, also check llapi_hsm_copy_end(). */
973 /* Take care: copy->hc_hai.hai_action, len, gid and data are not
974 * initialized if copy_end was called with copy == NULL.
975 */
976
977 /* Forge a hsm_progress based on data from copy. */
978 hpk.hpk_fid = copy->hc_hai.hai_fid;
979 hpk.hpk_cookie = copy->hc_hai.hai_cookie;
980 hpk.hpk_extent = copy->hc_hai.hai_extent;
981 hpk.hpk_flags = copy->hc_flags | HP_FLAG_COMPLETED;
982 hpk.hpk_errval = copy->hc_errval;
983 hpk.hpk_data_version = 0;
984
985 /* For archive request, we need to check the file data was not changed.
986 *
987 * For restore request, we need to send the file data version, this is
988 * useful when the file was created using hsm_import.
989 */
990 if (((copy->hc_hai.hai_action == HSMA_ARCHIVE) ||
991 (copy->hc_hai.hai_action == HSMA_RESTORE)) &&
992 (copy->hc_errval == 0)) {
993 struct inode *inode;
994 __u64 data_version = 0;
995
996 /* Get lsm for this fid */
997 inode = search_inode_for_lustre(sb, &copy->hc_hai.hai_fid);
998 if (IS_ERR(inode)) {
999 hpk.hpk_flags |= HP_FLAG_RETRY;
1000 /* hpk_errval must be >= 0 */
1001 hpk.hpk_errval = -PTR_ERR(inode);
1002 GOTO(progress, rc = PTR_ERR(inode));
1003 }
1004
1005 rc = ll_data_version(inode, &data_version,
1006 copy->hc_hai.hai_action == HSMA_ARCHIVE);
1007 iput(inode);
1008 if (rc) {
1009 CDEBUG(D_HSM, "Could not read file data version. "
1010 "Request could not be confirmed.\n");
1011 if (hpk.hpk_errval == 0)
1012 hpk.hpk_errval = -rc;
1013 GOTO(progress, rc);
1014 }
1015
1016 /* Store it the hsm_copy for later copytool use.
1017 * Always modified even if no lsm. */
1018 hpk.hpk_data_version = data_version;
1019
1020 /* File could have been stripped during archiving, so we need
1021 * to check anyway. */
1022 if ((copy->hc_hai.hai_action == HSMA_ARCHIVE) &&
1023 (copy->hc_data_version != data_version)) {
1024 CDEBUG(D_HSM, "File data version mismatched. "
1025 "File content was changed during archiving. "
1026 DFID", start:"LPX64" current:"LPX64"\n",
1027 PFID(&copy->hc_hai.hai_fid),
1028 copy->hc_data_version, data_version);
1029 /* File was changed, send error to cdt. Do not ask for
1030 * retry because if a file is modified frequently,
1031 * the cdt will loop on retried archive requests.
1032 * The policy engine will ask for a new archive later
1033 * when the file will not be modified for some tunable
1034 * time */
1035 /* we do not notify caller */
1036 hpk.hpk_flags &= ~HP_FLAG_RETRY;
1037 /* hpk_errval must be >= 0 */
1038 hpk.hpk_errval = EBUSY;
1039 }
1040
1041 }
1042
1043progress:
1044 rc = obd_iocontrol(LL_IOC_HSM_PROGRESS, sbi->ll_md_exp, sizeof(hpk),
1045 &hpk, NULL);
1046
1047 RETURN(rc);
1048}
1049
1050
1051static int copy_and_ioctl(int cmd, struct obd_export *exp, void *data, int len)
1052{
1053 void *ptr;
1054 int rc;
1055
1056 OBD_ALLOC(ptr, len);
1057 if (ptr == NULL)
1058 return -ENOMEM;
1059 if (copy_from_user(ptr, data, len)) {
1060 OBD_FREE(ptr, len);
1061 return -EFAULT;
1062 }
1063 rc = obd_iocontrol(cmd, exp, len, data, NULL);
1064 OBD_FREE(ptr, len);
1065 return rc;
1066}
1067
1068static int quotactl_ioctl(struct ll_sb_info *sbi, struct if_quotactl *qctl)
1069{
1070 int cmd = qctl->qc_cmd;
1071 int type = qctl->qc_type;
1072 int id = qctl->qc_id;
1073 int valid = qctl->qc_valid;
1074 int rc = 0;
d7e09d03
PT		 1075
1076 switch (cmd) {
1077 case LUSTRE_Q_INVALIDATE:
1078 case LUSTRE_Q_FINVALIDATE:
1079 case Q_QUOTAON:
1080 case Q_QUOTAOFF:
1081 case Q_SETQUOTA:
1082 case Q_SETINFO:
1083 if (!cfs_capable(CFS_CAP_SYS_ADMIN) ||
1084 sbi->ll_flags & LL_SBI_RMT_CLIENT)
1085 RETURN(-EPERM);
1086 break;
1087 case Q_GETQUOTA:
4b1a25f0
PT		 1088 if (((type == USRQUOTA &&
1089 uid_eq(current_euid(), make_kuid(&init_user_ns, id))) ||
1090 (type == GRPQUOTA &&
1091 !in_egroup_p(make_kgid(&init_user_ns, id)))) &&
d7e09d03
PT		 1092 (!cfs_capable(CFS_CAP_SYS_ADMIN) ||
1093 sbi->ll_flags & LL_SBI_RMT_CLIENT))
1094 RETURN(-EPERM);
1095 break;
1096 case Q_GETINFO:
1097 break;
1098 default:
1099 CERROR("unsupported quotactl op: %#x\n", cmd);
1100 RETURN(-ENOTTY);
1101 }
1102
1103 if (valid != QC_GENERAL) {
1104 if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
1105 RETURN(-EOPNOTSUPP);
1106
1107 if (cmd == Q_GETINFO)
1108 qctl->qc_cmd = Q_GETOINFO;
1109 else if (cmd == Q_GETQUOTA)
1110 qctl->qc_cmd = Q_GETOQUOTA;
1111 else
1112 RETURN(-EINVAL);
1113
1114 switch (valid) {
1115 case QC_MDTIDX:
1116 rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
1117 sizeof(*qctl), qctl, NULL);
1118 break;
1119 case QC_OSTIDX:
1120 rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_dt_exp,
1121 sizeof(*qctl), qctl, NULL);
1122 break;
1123 case QC_UUID:
1124 rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
1125 sizeof(*qctl), qctl, NULL);
1126 if (rc == -EAGAIN)
1127 rc = obd_iocontrol(OBD_IOC_QUOTACTL,
1128 sbi->ll_dt_exp,
1129 sizeof(*qctl), qctl, NULL);
1130 break;
1131 default:
1132 rc = -EINVAL;
1133 break;
1134 }
1135
1136 if (rc)
1137 RETURN(rc);
1138
1139 qctl->qc_cmd = cmd;
1140 } else {
1141 struct obd_quotactl *oqctl;
1142
1143 OBD_ALLOC_PTR(oqctl);
1144 if (oqctl == NULL)
1145 RETURN(-ENOMEM);
1146
1147 QCTL_COPY(oqctl, qctl);
1148 rc = obd_quotactl(sbi->ll_md_exp, oqctl);
1149 if (rc) {
1150 if (rc != -EALREADY && cmd == Q_QUOTAON) {
1151 oqctl->qc_cmd = Q_QUOTAOFF;
1152 obd_quotactl(sbi->ll_md_exp, oqctl);
1153 }
1154 OBD_FREE_PTR(oqctl);
1155 RETURN(rc);
1156 }
1157 /* If QIF_SPACE is not set, client should collect the
1158 * space usage from OSSs by itself */
1159 if (cmd == Q_GETQUOTA &&
1160 !(oqctl->qc_dqblk.dqb_valid & QIF_SPACE) &&
1161 !oqctl->qc_dqblk.dqb_curspace) {
1162 struct obd_quotactl *oqctl_tmp;
1163
1164 OBD_ALLOC_PTR(oqctl_tmp);
1165 if (oqctl_tmp == NULL)
1166 GOTO(out, rc = -ENOMEM);
1167
1168 oqctl_tmp->qc_cmd = Q_GETOQUOTA;
1169 oqctl_tmp->qc_id = oqctl->qc_id;
1170 oqctl_tmp->qc_type = oqctl->qc_type;
1171
1172 /* collect space usage from OSTs */
1173 oqctl_tmp->qc_dqblk.dqb_curspace = 0;
1174 rc = obd_quotactl(sbi->ll_dt_exp, oqctl_tmp);
1175 if (!rc || rc == -EREMOTEIO) {
1176 oqctl->qc_dqblk.dqb_curspace =
1177 oqctl_tmp->qc_dqblk.dqb_curspace;
1178 oqctl->qc_dqblk.dqb_valid |= QIF_SPACE;
1179 }
1180
1181 /* collect space & inode usage from MDTs */
1182 oqctl_tmp->qc_dqblk.dqb_curspace = 0;
1183 oqctl_tmp->qc_dqblk.dqb_curinodes = 0;
1184 rc = obd_quotactl(sbi->ll_md_exp, oqctl_tmp);
1185 if (!rc || rc == -EREMOTEIO) {
1186 oqctl->qc_dqblk.dqb_curspace +=
1187 oqctl_tmp->qc_dqblk.dqb_curspace;
1188 oqctl->qc_dqblk.dqb_curinodes =
1189 oqctl_tmp->qc_dqblk.dqb_curinodes;
1190 oqctl->qc_dqblk.dqb_valid |= QIF_INODES;
1191 } else {
1192 oqctl->qc_dqblk.dqb_valid &= ~QIF_SPACE;
1193 }
1194
1195 OBD_FREE_PTR(oqctl_tmp);
1196 }
1197out:
1198 QCTL_COPY(qctl, oqctl);
1199 OBD_FREE_PTR(oqctl);
1200 }
1201
1202 RETURN(rc);
1203}
1204
1205static char *
1206ll_getname(const char __user *filename)
1207{
1208 int ret = 0, len;
1209 char *tmp = __getname();
1210
1211 if (!tmp)
1212 return ERR_PTR(-ENOMEM);
1213
1214 len = strncpy_from_user(tmp, filename, PATH_MAX);
1215 if (len == 0)
1216 ret = -ENOENT;
1217 else if (len > PATH_MAX)
1218 ret = -ENAMETOOLONG;
1219
1220 if (ret) {
1221 __putname(tmp);
1222 tmp = ERR_PTR(ret);
1223 }
1224 return tmp;
1225}
1226
1227#define ll_putname(filename) __putname(filename)
1228
1229static long ll_dir_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1230{
1231 struct inode *inode = file->f_dentry->d_inode;
1232 struct ll_sb_info *sbi = ll_i2sbi(inode);
1233 struct obd_ioctl_data *data;
1234 int rc = 0;
d7e09d03
PT		 1235
1236 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), cmd=%#x\n",
1237 inode->i_ino, inode->i_generation, inode, cmd);
1238
1239 /* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */
1240 if (_IOC_TYPE(cmd) == 'T' || _IOC_TYPE(cmd) == 't') /* tty ioctls */
1241 return -ENOTTY;
1242
1243 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_IOCTL, 1);
1244 switch(cmd) {
1245 case FSFILT_IOC_GETFLAGS:
1246 case FSFILT_IOC_SETFLAGS:
1247 RETURN(ll_iocontrol(inode, file, cmd, arg));
1248 case FSFILT_IOC_GETVERSION_OLD:
1249 case FSFILT_IOC_GETVERSION:
1250 RETURN(put_user(inode->i_generation, (int *)arg));
1251 /* We need to special case any other ioctls we want to handle,
1252 * to send them to the MDS/OST as appropriate and to properly
1253 * network encode the arg field.
1254 case FSFILT_IOC_SETVERSION_OLD:
1255 case FSFILT_IOC_SETVERSION:
1256 */
1257 case LL_IOC_GET_MDTIDX: {
1258 int mdtidx;
1259
1260 mdtidx = ll_get_mdt_idx(inode);
1261 if (mdtidx < 0)
1262 RETURN(mdtidx);
1263
1264 if (put_user((int)mdtidx, (int*)arg))
1265 RETURN(-EFAULT);
1266
1267 return 0;
1268 }
1269 case IOC_MDC_LOOKUP: {
1270 struct ptlrpc_request *request = NULL;
1271 int namelen, len = 0;
1272 char *buf = NULL;
1273 char *filename;
1274 struct md_op_data *op_data;
1275
1276 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
1277 if (rc)
1278 RETURN(rc);
1279 data = (void *)buf;
1280
1281 filename = data->ioc_inlbuf1;
1282 namelen = strlen(filename);
1283
1284 if (namelen < 1) {
1285 CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
1286 GOTO(out_free, rc = -EINVAL);
1287 }
1288
1289 op_data = ll_prep_md_op_data(NULL, inode, NULL, filename, namelen,
1290 0, LUSTRE_OPC_ANY, NULL);
1291 if (IS_ERR(op_data))
1292 GOTO(out_free, rc = PTR_ERR(op_data));
1293
1294 op_data->op_valid = OBD_MD_FLID;
1295 rc = md_getattr_name(sbi->ll_md_exp, op_data, &request);
1296 ll_finish_md_op_data(op_data);
1297 if (rc < 0) {
1298 CDEBUG(D_INFO, "md_getattr_name: %d\n", rc);
1299 GOTO(out_free, rc);
1300 }
1301 ptlrpc_req_finished(request);
d7e09d03
PT		 1302out_free:
1303 obd_ioctl_freedata(buf, len);
1304 return rc;
1305 }
1306 case LL_IOC_LMV_SETSTRIPE: {
1307 struct lmv_user_md *lum;
1308 char *buf = NULL;
1309 char *filename;
1310 int namelen = 0;
1311 int lumlen = 0;
1312 int len;
1313 int rc;
1314
1315 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
1316 if (rc)
1317 RETURN(rc);
1318
1319 data = (void *)buf;
1320 if (data->ioc_inlbuf1 == NULL || data->ioc_inlbuf2 == NULL ||
1321 data->ioc_inllen1 == 0 || data->ioc_inllen2 == 0)
1322 GOTO(lmv_out_free, rc = -EINVAL);
1323
1324 filename = data->ioc_inlbuf1;
1325 namelen = data->ioc_inllen1;
1326
1327 if (namelen < 1) {
1328 CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
1329 GOTO(lmv_out_free, rc = -EINVAL);
1330 }
1331 lum = (struct lmv_user_md *)data->ioc_inlbuf2;
1332 lumlen = data->ioc_inllen2;
1333
1334 if (lum->lum_magic != LMV_USER_MAGIC ||
1335 lumlen != sizeof(*lum)) {
1336 CERROR("%s: wrong lum magic %x or size %d: rc = %d\n",
1337 filename, lum->lum_magic, lumlen, -EFAULT);
1338 GOTO(lmv_out_free, rc = -EINVAL);
1339 }
1340
1341 /**
1342 * ll_dir_setdirstripe will be used to set dir stripe
1343 * mdc_create--->mdt_reint_create (with dirstripe)
1344 */
1345 rc = ll_dir_setdirstripe(inode, lum, filename);
1346lmv_out_free:
1347 obd_ioctl_freedata(buf, len);
1348 RETURN(rc);
1349
1350 }
1351 case LL_IOC_LOV_SETSTRIPE: {
1352 struct lov_user_md_v3 lumv3;
1353 struct lov_user_md_v1 *lumv1 = (struct lov_user_md_v1 *)&lumv3;
1354 struct lov_user_md_v1 *lumv1p = (struct lov_user_md_v1 *)arg;
1355 struct lov_user_md_v3 *lumv3p = (struct lov_user_md_v3 *)arg;
1356
1357 int set_default = 0;
1358
1359 LASSERT(sizeof(lumv3) == sizeof(*lumv3p));
1360 LASSERT(sizeof(lumv3.lmm_objects[0]) ==
1361 sizeof(lumv3p->lmm_objects[0]));
1362 /* first try with v1 which is smaller than v3 */
1363 if (copy_from_user(lumv1, lumv1p, sizeof(*lumv1)))
1364 RETURN(-EFAULT);
1365
1366 if ((lumv1->lmm_magic == LOV_USER_MAGIC_V3) ) {
1367 if (copy_from_user(&lumv3, lumv3p, sizeof(lumv3)))
1368 RETURN(-EFAULT);
1369 }
1370
1371 if (inode->i_sb->s_root == file->f_dentry)
1372 set_default = 1;
1373
1374 /* in v1 and v3 cases lumv1 points to data */
1375 rc = ll_dir_setstripe(inode, lumv1, set_default);
1376
1377 RETURN(rc);
1378 }
1379 case LL_IOC_LMV_GETSTRIPE: {
1380 struct lmv_user_md *lump = (struct lmv_user_md *)arg;
1381 struct lmv_user_md lum;
1382 struct lmv_user_md *tmp;
1383 int lum_size;
1384 int rc = 0;
1385 int mdtindex;
1386
1387 if (copy_from_user(&lum, lump, sizeof(struct lmv_user_md)))
1388 RETURN(-EFAULT);
1389
1390 if (lum.lum_magic != LMV_MAGIC_V1)
1391 RETURN(-EINVAL);
1392
1393 lum_size = lmv_user_md_size(1, LMV_MAGIC_V1);
1394 OBD_ALLOC(tmp, lum_size);
1395 if (tmp == NULL)
1396 GOTO(free_lmv, rc = -ENOMEM);
1397
1398 memcpy(tmp, &lum, sizeof(lum));
1399 tmp->lum_type = LMV_STRIPE_TYPE;
1400 tmp->lum_stripe_count = 1;
1401 mdtindex = ll_get_mdt_idx(inode);
1402 if (mdtindex < 0)
1403 GOTO(free_lmv, rc = -ENOMEM);
1404
1405 tmp->lum_stripe_offset = mdtindex;
1406 tmp->lum_objects[0].lum_mds = mdtindex;
1407 memcpy(&tmp->lum_objects[0].lum_fid, ll_inode2fid(inode),
1408 sizeof(struct lu_fid));
1409 if (copy_to_user((void *)arg, tmp, lum_size))
1410 GOTO(free_lmv, rc = -EFAULT);
1411free_lmv:
1412 if (tmp)
1413 OBD_FREE(tmp, lum_size);
1414 RETURN(rc);
1415 }
1416 case LL_IOC_REMOVE_ENTRY: {
1417 char *filename = NULL;
1418 int namelen = 0;
1419 int rc;
1420
1421 /* Here is a little hack to avoid sending REINT_RMENTRY to
1422 * unsupported server, which might crash the server(LU-2730),
1423 * Because both LVB_TYPE and REINT_RMENTRY will be supported
1424 * on 2.4, we use OBD_CONNECT_LVB_TYPE to detect whether the
1425 * server will support REINT_RMENTRY XXX*/
1426 if (!(exp_connect_flags(sbi->ll_md_exp) & OBD_CONNECT_LVB_TYPE))
1427 return -ENOTSUPP;
1428
1429 filename = ll_getname((const char *)arg);
1430 if (IS_ERR(filename))
1431 RETURN(PTR_ERR(filename));
1432
1433 namelen = strlen(filename);
1434 if (namelen < 1)
1435 GOTO(out_rmdir, rc = -EINVAL);
1436
1437 rc = ll_rmdir_entry(inode, filename, namelen);
1438out_rmdir:
1439 if (filename)
1440 ll_putname(filename);
1441 RETURN(rc);
1442 }
1443 case LL_IOC_LOV_SWAP_LAYOUTS:
1444 RETURN(-EPERM);
1445 case LL_IOC_OBD_STATFS:
1446 RETURN(ll_obd_statfs(inode, (void *)arg));
1447 case LL_IOC_LOV_GETSTRIPE:
1448 case LL_IOC_MDC_GETINFO:
1449 case IOC_MDC_GETFILEINFO:
1450 case IOC_MDC_GETFILESTRIPE: {
1451 struct ptlrpc_request *request = NULL;
1452 struct lov_user_md *lump;
1453 struct lov_mds_md *lmm = NULL;
1454 struct mdt_body *body;
1455 char *filename = NULL;
1456 int lmmsize;
1457
1458 if (cmd == IOC_MDC_GETFILEINFO ||
1459 cmd == IOC_MDC_GETFILESTRIPE) {
1460 filename = ll_getname((const char *)arg);
1461 if (IS_ERR(filename))
1462 RETURN(PTR_ERR(filename));
1463
1464 rc = ll_lov_getstripe_ea_info(inode, filename, &lmm,
1465 &lmmsize, &request);
1466 } else {
1467 rc = ll_dir_getstripe(inode, &lmm, &lmmsize, &request);
1468 }
1469
1470 if (request) {
1471 body = req_capsule_server_get(&request->rq_pill,
1472 &RMF_MDT_BODY);
1473 LASSERT(body != NULL);
1474 } else {
1475 GOTO(out_req, rc);
1476 }
1477
1478 if (rc < 0) {
1479 if (rc == -ENODATA && (cmd == IOC_MDC_GETFILEINFO ||
1480 cmd == LL_IOC_MDC_GETINFO))
1481 GOTO(skip_lmm, rc = 0);
1482 else
1483 GOTO(out_req, rc);
1484 }
1485
1486 if (cmd == IOC_MDC_GETFILESTRIPE ||
1487 cmd == LL_IOC_LOV_GETSTRIPE) {
1488 lump = (struct lov_user_md *)arg;
1489 } else {
1490 struct lov_user_mds_data *lmdp;
1491 lmdp = (struct lov_user_mds_data *)arg;
1492 lump = &lmdp->lmd_lmm;
1493 }
1494 if (copy_to_user(lump, lmm, lmmsize)) {
1495 if (copy_to_user(lump, lmm, sizeof(*lump)))
1496 GOTO(out_req, rc = -EFAULT);
1497 rc = -EOVERFLOW;
1498 }
1499 skip_lmm:
1500 if (cmd == IOC_MDC_GETFILEINFO || cmd == LL_IOC_MDC_GETINFO) {
1501 struct lov_user_mds_data *lmdp;
1502 lstat_t st = { 0 };
1503
1504 st.st_dev = inode->i_sb->s_dev;
1505 st.st_mode = body->mode;
1506 st.st_nlink = body->nlink;
1507 st.st_uid = body->uid;
1508 st.st_gid = body->gid;
1509 st.st_rdev = body->rdev;
1510 st.st_size = body->size;
1511 st.st_blksize = PAGE_CACHE_SIZE;
1512 st.st_blocks = body->blocks;
1513 st.st_atime = body->atime;
1514 st.st_mtime = body->mtime;
1515 st.st_ctime = body->ctime;
1516 st.st_ino = inode->i_ino;
1517
1518 lmdp = (struct lov_user_mds_data *)arg;
1519 if (copy_to_user(&lmdp->lmd_st, &st, sizeof(st)))
1520 GOTO(out_req, rc = -EFAULT);
1521 }
1522
d7e09d03
PT		 1523 out_req:
1524 ptlrpc_req_finished(request);
1525 if (filename)
1526 ll_putname(filename);
1527 return rc;
1528 }
1529 case IOC_LOV_GETINFO: {
1530 struct lov_user_mds_data *lumd;
1531 struct lov_stripe_md *lsm;
1532 struct lov_user_md *lum;
1533 struct lov_mds_md *lmm;
1534 int lmmsize;
1535 lstat_t st;
1536
1537 lumd = (struct lov_user_mds_data *)arg;
1538 lum = &lumd->lmd_lmm;
1539
1540 rc = ll_get_max_mdsize(sbi, &lmmsize);
1541 if (rc)
1542 RETURN(rc);
1543
1544 OBD_ALLOC_LARGE(lmm, lmmsize);
73863d83
JH		 1545 if (lmm == NULL)
1546 RETURN(-ENOMEM);
d7e09d03
PT		 1547 if (copy_from_user(lmm, lum, lmmsize))
1548 GOTO(free_lmm, rc = -EFAULT);
1549
1550 switch (lmm->lmm_magic) {
1551 case LOV_USER_MAGIC_V1:
1552 if (LOV_USER_MAGIC_V1 == cpu_to_le32(LOV_USER_MAGIC_V1))
1553 break;
1554 /* swab objects first so that stripes num will be sane */
1555 lustre_swab_lov_user_md_objects(
1556 ((struct lov_user_md_v1 *)lmm)->lmm_objects,
1557 ((struct lov_user_md_v1 *)lmm)->lmm_stripe_count);
1558 lustre_swab_lov_user_md_v1((struct lov_user_md_v1 *)lmm);
1559 break;
1560 case LOV_USER_MAGIC_V3:
1561 if (LOV_USER_MAGIC_V3 == cpu_to_le32(LOV_USER_MAGIC_V3))
1562 break;
1563 /* swab objects first so that stripes num will be sane */
1564 lustre_swab_lov_user_md_objects(
1565 ((struct lov_user_md_v3 *)lmm)->lmm_objects,
1566 ((struct lov_user_md_v3 *)lmm)->lmm_stripe_count);
1567 lustre_swab_lov_user_md_v3((struct lov_user_md_v3 *)lmm);
1568 break;
1569 default:
1570 GOTO(free_lmm, rc = -EINVAL);
1571 }
1572
1573 rc = obd_unpackmd(sbi->ll_dt_exp, &lsm, lmm, lmmsize);
1574 if (rc < 0)
1575 GOTO(free_lmm, rc = -ENOMEM);
1576
1577 /* Perform glimpse_size operation. */
1578 memset(&st, 0, sizeof(st));
1579
1580 rc = ll_glimpse_ioctl(sbi, lsm, &st);
1581 if (rc)
1582 GOTO(free_lsm, rc);
1583
1584 if (copy_to_user(&lumd->lmd_st, &st, sizeof(st)))
1585 GOTO(free_lsm, rc = -EFAULT);
1586
d7e09d03
PT		 1587 free_lsm:
1588 obd_free_memmd(sbi->ll_dt_exp, &lsm);
1589 free_lmm:
1590 OBD_FREE_LARGE(lmm, lmmsize);
1591 return rc;
1592 }
1593 case OBD_IOC_LLOG_CATINFO: {
1594 RETURN(-EOPNOTSUPP);
1595 }
1596 case OBD_IOC_QUOTACHECK: {
1597 struct obd_quotactl *oqctl;
1598 int error = 0;
1599
1600 if (!cfs_capable(CFS_CAP_SYS_ADMIN) ||
1601 sbi->ll_flags & LL_SBI_RMT_CLIENT)
1602 RETURN(-EPERM);
1603
1604 OBD_ALLOC_PTR(oqctl);
1605 if (!oqctl)
1606 RETURN(-ENOMEM);
1607 oqctl->qc_type = arg;
1608 rc = obd_quotacheck(sbi->ll_md_exp, oqctl);
1609 if (rc < 0) {
1610 CDEBUG(D_INFO, "md_quotacheck failed: rc %d\n", rc);
1611 error = rc;
1612 }
1613
1614 rc = obd_quotacheck(sbi->ll_dt_exp, oqctl);
1615 if (rc < 0)
1616 CDEBUG(D_INFO, "obd_quotacheck failed: rc %d\n", rc);
1617
1618 OBD_FREE_PTR(oqctl);
1619 return error ?: rc;
1620 }
1621 case OBD_IOC_POLL_QUOTACHECK: {
1622 struct if_quotacheck *check;
1623
1624 if (!cfs_capable(CFS_CAP_SYS_ADMIN) ||
1625 sbi->ll_flags & LL_SBI_RMT_CLIENT)
1626 RETURN(-EPERM);
1627
1628 OBD_ALLOC_PTR(check);
1629 if (!check)
1630 RETURN(-ENOMEM);
1631
1632 rc = obd_iocontrol(cmd, sbi->ll_md_exp, 0, (void *)check,
1633 NULL);
1634 if (rc) {
1635 CDEBUG(D_QUOTA, "mdc ioctl %d failed: %d\n", cmd, rc);
1636 if (copy_to_user((void *)arg, check,
1637 sizeof(*check)))
1638 CDEBUG(D_QUOTA, "copy_to_user failed\n");
1639 GOTO(out_poll, rc);
1640 }
1641
1642 rc = obd_iocontrol(cmd, sbi->ll_dt_exp, 0, (void *)check,
1643 NULL);
1644 if (rc) {
1645 CDEBUG(D_QUOTA, "osc ioctl %d failed: %d\n", cmd, rc);
1646 if (copy_to_user((void *)arg, check,
1647 sizeof(*check)))
1648 CDEBUG(D_QUOTA, "copy_to_user failed\n");
1649 GOTO(out_poll, rc);
1650 }
1651 out_poll:
1652 OBD_FREE_PTR(check);
1653 RETURN(rc);
1654 }
1655#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 7, 50, 0)
1656 case LL_IOC_QUOTACTL_18: {
1657 /* copy the old 1.x quota struct for internal use, then copy
1658 * back into old format struct. For 1.8 compatibility. */
1659 struct if_quotactl_18 *qctl_18;
1660 struct if_quotactl *qctl_20;
1661
1662 OBD_ALLOC_PTR(qctl_18);
1663 if (!qctl_18)
1664 RETURN(-ENOMEM);
1665
1666 OBD_ALLOC_PTR(qctl_20);
1667 if (!qctl_20)
1668 GOTO(out_quotactl_18, rc = -ENOMEM);
1669
1670 if (copy_from_user(qctl_18, (void *)arg, sizeof(*qctl_18)))
1671 GOTO(out_quotactl_20, rc = -ENOMEM);
1672
1673 QCTL_COPY(qctl_20, qctl_18);
1674 qctl_20->qc_idx = 0;
1675
1676 /* XXX: dqb_valid was borrowed as a flag to mark that
1677 * only mds quota is wanted */
1678 if (qctl_18->qc_cmd == Q_GETQUOTA &&
1679 qctl_18->qc_dqblk.dqb_valid) {
1680 qctl_20->qc_valid = QC_MDTIDX;
1681 qctl_20->qc_dqblk.dqb_valid = 0;
1682 } else if (qctl_18->obd_uuid.uuid[0] != '\0') {
1683 qctl_20->qc_valid = QC_UUID;
1684 qctl_20->obd_uuid = qctl_18->obd_uuid;
1685 } else {
1686 qctl_20->qc_valid = QC_GENERAL;
1687 }
1688
1689 rc = quotactl_ioctl(sbi, qctl_20);
1690
1691 if (rc == 0) {
1692 QCTL_COPY(qctl_18, qctl_20);
1693 qctl_18->obd_uuid = qctl_20->obd_uuid;
1694
1695 if (copy_to_user((void *)arg, qctl_18,
1696 sizeof(*qctl_18)))
1697 rc = -EFAULT;
1698 }
1699
1700 out_quotactl_20:
1701 OBD_FREE_PTR(qctl_20);
1702 out_quotactl_18:
1703 OBD_FREE_PTR(qctl_18);
1704 RETURN(rc);
1705 }
1706#else
1707#warning "remove old LL_IOC_QUOTACTL_18 compatibility code"
1708#endif /* LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 7, 50, 0) */
1709 case LL_IOC_QUOTACTL: {
1710 struct if_quotactl *qctl;
1711
1712 OBD_ALLOC_PTR(qctl);
1713 if (!qctl)
1714 RETURN(-ENOMEM);
1715
1716 if (copy_from_user(qctl, (void *)arg, sizeof(*qctl)))
1717 GOTO(out_quotactl, rc = -EFAULT);
1718
1719 rc = quotactl_ioctl(sbi, qctl);
1720
1721 if (rc == 0 && copy_to_user((void *)arg,qctl,sizeof(*qctl)))
1722 rc = -EFAULT;
1723
1724 out_quotactl:
1725 OBD_FREE_PTR(qctl);
1726 RETURN(rc);
1727 }
1728 case OBD_IOC_GETDTNAME:
1729 case OBD_IOC_GETMDNAME:
1730 RETURN(ll_get_obd_name(inode, cmd, arg));
1731 case LL_IOC_FLUSHCTX:
1732 RETURN(ll_flush_ctx(inode));
1733#ifdef CONFIG_FS_POSIX_ACL
1734 case LL_IOC_RMTACL: {
1735 if (sbi->ll_flags & LL_SBI_RMT_CLIENT &&
1736 inode == inode->i_sb->s_root->d_inode) {
1737 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1738
1739 LASSERT(fd != NULL);
1740 rc = rct_add(&sbi->ll_rct, current_pid(), arg);
1741 if (!rc)
1742 fd->fd_flags |= LL_FILE_RMTACL;
1743 RETURN(rc);
1744 } else
1745 RETURN(0);
1746 }
1747#endif
1748 case LL_IOC_GETOBDCOUNT: {
1749 int count, vallen;
1750 struct obd_export *exp;
1751
1752 if (copy_from_user(&count, (int *)arg, sizeof(int)))
1753 RETURN(-EFAULT);
1754
1755 /* get ost count when count is zero, get mdt count otherwise */
1756 exp = count ? sbi->ll_md_exp : sbi->ll_dt_exp;
1757 vallen = sizeof(count);
1758 rc = obd_get_info(NULL, exp, sizeof(KEY_TGT_COUNT),
1759 KEY_TGT_COUNT, &vallen, &count, NULL);
1760 if (rc) {
1761 CERROR("get target count failed: %d\n", rc);
1762 RETURN(rc);
1763 }
1764
1765 if (copy_to_user((int *)arg, &count, sizeof(int)))
1766 RETURN(-EFAULT);
1767
1768 RETURN(0);
1769 }
1770 case LL_IOC_PATH2FID:
1771 if (copy_to_user((void *)arg, ll_inode2fid(inode),
1772 sizeof(struct lu_fid)))
1773 RETURN(-EFAULT);
1774 RETURN(0);
1775 case LL_IOC_GET_CONNECT_FLAGS: {
1776 RETURN(obd_iocontrol(cmd, sbi->ll_md_exp, 0, NULL, (void*)arg));
1777 }
1778 case OBD_IOC_CHANGELOG_SEND:
1779 case OBD_IOC_CHANGELOG_CLEAR:
1780 rc = copy_and_ioctl(cmd, sbi->ll_md_exp, (void *)arg,
1781 sizeof(struct ioc_changelog));
1782 RETURN(rc);
1783 case OBD_IOC_FID2PATH:
1784 RETURN(ll_fid2path(inode, (void *)arg));
1785 case LL_IOC_HSM_REQUEST: {
1786 struct hsm_user_request *hur;
1787 int totalsize;
1788
1789 OBD_ALLOC_PTR(hur);
1790 if (hur == NULL)
1791 RETURN(-ENOMEM);
1792
1793 /* We don't know the true size yet; copy the fixed-size part */
1794 if (copy_from_user(hur, (void *)arg, sizeof(*hur))) {
1795 OBD_FREE_PTR(hur);
1796 RETURN(-EFAULT);
1797 }
1798
1799 /* Compute the whole struct size */
1800 totalsize = hur_len(hur);
1801 OBD_FREE_PTR(hur);
1802 OBD_ALLOC_LARGE(hur, totalsize);
1803 if (hur == NULL)
1804 RETURN(-ENOMEM);
1805
1806 /* Copy the whole struct */
1807 if (copy_from_user(hur, (void *)arg, totalsize)) {
1808 OBD_FREE_LARGE(hur, totalsize);
1809 RETURN(-EFAULT);
1810 }
1811
1812 rc = obd_iocontrol(cmd, ll_i2mdexp(inode), totalsize,
1813 hur, NULL);
1814
1815 OBD_FREE_LARGE(hur, totalsize);
1816
1817 RETURN(rc);
1818 }
1819 case LL_IOC_HSM_PROGRESS: {
1820 struct hsm_progress_kernel hpk;
1821 struct hsm_progress hp;
1822
1823 if (copy_from_user(&hp, (void *)arg, sizeof(hp)))
1824 RETURN(-EFAULT);
1825
1826 hpk.hpk_fid = hp.hp_fid;
1827 hpk.hpk_cookie = hp.hp_cookie;
1828 hpk.hpk_extent = hp.hp_extent;
1829 hpk.hpk_flags = hp.hp_flags;
1830 hpk.hpk_errval = hp.hp_errval;
1831 hpk.hpk_data_version = 0;
1832
1833 /* File may not exist in Lustre; all progress
1834 * reported to Lustre root */
1835 rc = obd_iocontrol(cmd, sbi->ll_md_exp, sizeof(hpk), &hpk,
1836 NULL);
1837 RETURN(rc);
1838 }
1839 case LL_IOC_HSM_CT_START:
1840 rc = copy_and_ioctl(cmd, sbi->ll_md_exp, (void *)arg,
1841 sizeof(struct lustre_kernelcomm));
1842 RETURN(rc);
1843
1844 case LL_IOC_HSM_COPY_START: {
1845 struct hsm_copy *copy;
1846 int rc;
1847
1848 OBD_ALLOC_PTR(copy);
1849 if (copy == NULL)
1850 RETURN(-ENOMEM);
1851 if (copy_from_user(copy, (char *)arg, sizeof(*copy))) {
1852 OBD_FREE_PTR(copy);
1853 RETURN(-EFAULT);
1854 }
1855
1856 rc = ll_ioc_copy_start(inode->i_sb, copy);
1857 if (copy_to_user((char *)arg, copy, sizeof(*copy)))
1858 rc = -EFAULT;
1859
1860 OBD_FREE_PTR(copy);
1861 RETURN(rc);
1862 }
1863 case LL_IOC_HSM_COPY_END: {
1864 struct hsm_copy *copy;
1865 int rc;
1866
1867 OBD_ALLOC_PTR(copy);
1868 if (copy == NULL)
1869 RETURN(-ENOMEM);
1870 if (copy_from_user(copy, (char *)arg, sizeof(*copy))) {
1871 OBD_FREE_PTR(copy);
1872 RETURN(-EFAULT);
1873 }
1874
1875 rc = ll_ioc_copy_end(inode->i_sb, copy);
1876 if (copy_to_user((char *)arg, copy, sizeof(*copy)))
1877 rc = -EFAULT;
1878
1879 OBD_FREE_PTR(copy);
1880 RETURN(rc);
1881 }
1882 default:
1883 RETURN(obd_iocontrol(cmd, sbi->ll_dt_exp, 0, NULL,
1884 (void *)arg));
1885 }
1886}
1887
1888static loff_t ll_dir_seek(struct file *file, loff_t offset, int origin)
1889{
1890 struct inode *inode = file->f_mapping->host;
1891 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1892 struct ll_sb_info *sbi = ll_i2sbi(inode);
1893 int api32 = ll_need_32bit_api(sbi);
1894 loff_t ret = -EINVAL;
d7e09d03
PT		 1895
1896 mutex_lock(&inode->i_mutex);
1897 switch (origin) {
1898 case SEEK_SET:
1899 break;
1900 case SEEK_CUR:
1901 offset += file->f_pos;
1902 break;
1903 case SEEK_END:
1904 if (offset > 0)
1905 GOTO(out, ret);
1906 if (api32)
1907 offset += LL_DIR_END_OFF_32BIT;
1908 else
1909 offset += LL_DIR_END_OFF;
1910 break;
1911 default:
1912 GOTO(out, ret);
1913 }
1914
1915 if (offset >= 0 &&
1916 ((api32 && offset <= LL_DIR_END_OFF_32BIT) ||
1917 (!api32 && offset <= LL_DIR_END_OFF))) {
1918 if (offset != file->f_pos) {
1919 if ((api32 && offset == LL_DIR_END_OFF_32BIT) ||
1920 (!api32 && offset == LL_DIR_END_OFF))
1921 fd->lfd_pos = MDS_DIR_END_OFF;
1922 else if (api32 && sbi->ll_flags & LL_SBI_64BIT_HASH)
1923 fd->lfd_pos = offset << 32;
1924 else
1925 fd->lfd_pos = offset;
1926 file->f_pos = offset;
1927 file->f_version = 0;
1928 }
1929 ret = offset;
1930 }
1931 GOTO(out, ret);
1932
1933out:
1934 mutex_unlock(&inode->i_mutex);
1935 return ret;
1936}
1937
1938int ll_dir_open(struct inode *inode, struct file *file)
1939{
d7e09d03
PT		 1940 RETURN(ll_file_open(inode, file));
1941}
1942
1943int ll_dir_release(struct inode *inode, struct file *file)
1944{
d7e09d03
PT		 1945 RETURN(ll_file_release(inode, file));
1946}
1947
1948struct file_operations ll_dir_operations = {
1949 .llseek = ll_dir_seek,
1950 .open = ll_dir_open,
1951 .release = ll_dir_release,
1952 .read = generic_read_dir,
0b09d381 1953 .iterate = ll_readdir,
d7e09d03
PT		 1954 .unlocked_ioctl = ll_dir_ioctl,
1955 .fsync = ll_fsync,
1956};
Linux kernel - Deliverables
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