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>
44 #include <linux/uaccess.h>
45 #include <linux/buffer_head.h> /* for wait_on_buffer */
46 #include <linux/pagevec.h>
47 #include <linux/prefetch.h>
48
49 #define DEBUG_SUBSYSTEM S_LLITE
50
51 #include "../include/obd_support.h"
52 #include "../include/obd_class.h"
53 #include "../include/lustre_lib.h"
54 #include "../include/lustre/lustre_idl.h"
55 #include "../include/lustre_lite.h"
56 #include "../include/lustre_dlm.h"
57 #include "../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 */
ll_dir_filler(void * _hash,struct page * page0)143 static 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;
160
161 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p) hash %llu\n",
162 inode->i_ino, inode->i_generation, inode, hash);
163
164 LASSERT(max_pages > 0 && max_pages <= MD_MAX_BRW_PAGES);
165
166 page_pool = kcalloc(max_pages, sizeof(page), GFP_NOFS);
167 if (page_pool) {
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 /* page0 is special, which was added into page cache early */
188 delete_from_page_cache(page0);
189 } else if (rc == 0) {
190 body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
191 /* Checked by mdc_readpage() */
192 LASSERT(body != NULL);
193
194 if (body->valid & OBD_MD_FLSIZE)
195 cl_isize_write(inode, body->size);
196
197 nrdpgs = (request->rq_bulk->bd_nob_transferred+PAGE_CACHE_SIZE-1)
198 >> PAGE_CACHE_SHIFT;
199 SetPageUptodate(page0);
200 }
201 unlock_page(page0);
202 ptlrpc_req_finished(request);
203
204 CDEBUG(D_VFSTRACE, "read %d/%d pages\n", nrdpgs, npages);
205
206 for (i = 1; i < npages; i++) {
207 unsigned long offset;
208 int ret;
209
210 page = page_pool[i];
211
212 if (rc < 0 || i >= nrdpgs) {
213 page_cache_release(page);
214 continue;
215 }
216
217 SetPageUptodate(page);
218
219 dp = kmap(page);
220 hash = le64_to_cpu(dp->ldp_hash_start);
221 kunmap(page);
222
223 offset = hash_x_index(hash, hash64);
224
225 prefetchw(&page->flags);
226 ret = add_to_page_cache_lru(page, inode->i_mapping, offset,
227 GFP_NOFS);
228 if (ret == 0) {
229 unlock_page(page);
230 } else {
231 CDEBUG(D_VFSTRACE, "page %lu add to page cache failed: %d\n",
232 offset, ret);
233 }
234 page_cache_release(page);
235 }
236
237 if (page_pool != &page0)
238 kfree(page_pool);
239 return rc;
240 }
241
ll_check_page(struct inode * dir,struct page * page)242 static void ll_check_page(struct inode *dir, struct page *page)
243 {
244 /* XXX: check page format later */
245 SetPageChecked(page);
246 }
247
ll_release_page(struct page * page,int remove)248 void ll_release_page(struct page *page, int remove)
249 {
250 kunmap(page);
251 if (remove) {
252 lock_page(page);
253 if (likely(page->mapping != NULL))
254 truncate_complete_page(page->mapping, page);
255 unlock_page(page);
256 }
257 page_cache_release(page);
258 }
259
260 /*
261 * Find, kmap and return page that contains given hash.
262 */
ll_dir_page_locate(struct inode * dir,__u64 * hash,__u64 * start,__u64 * end)263 static struct page *ll_dir_page_locate(struct inode *dir, __u64 *hash,
264 __u64 *start, __u64 *end)
265 {
266 int hash64 = ll_i2sbi(dir)->ll_flags & LL_SBI_64BIT_HASH;
267 struct address_space *mapping = dir->i_mapping;
268 /*
269 * Complement of hash is used as an index so that
270 * radix_tree_gang_lookup() can be used to find a page with starting
271 * hash _smaller_ than one we are looking for.
272 */
273 unsigned long offset = hash_x_index(*hash, hash64);
274 struct page *page;
275 int found;
276
277 spin_lock_irq(&mapping->tree_lock);
278 found = radix_tree_gang_lookup(&mapping->page_tree,
279 (void **)&page, offset, 1);
280 if (found > 0 && !radix_tree_exceptional_entry(page)) {
281 struct lu_dirpage *dp;
282
283 page_cache_get(page);
284 spin_unlock_irq(&mapping->tree_lock);
285 /*
286 * In contrast to find_lock_page() we are sure that directory
287 * page cannot be truncated (while DLM lock is held) and,
288 * hence, can avoid restart.
289 *
290 * In fact, page cannot be locked here at all, because
291 * ll_dir_filler() does synchronous io.
292 */
293 wait_on_page_locked(page);
294 if (PageUptodate(page)) {
295 dp = kmap(page);
296 if (BITS_PER_LONG == 32 && hash64) {
297 *start = le64_to_cpu(dp->ldp_hash_start) >> 32;
298 *end = le64_to_cpu(dp->ldp_hash_end) >> 32;
299 *hash = *hash >> 32;
300 } else {
301 *start = le64_to_cpu(dp->ldp_hash_start);
302 *end = le64_to_cpu(dp->ldp_hash_end);
303 }
304 LASSERTF(*start <= *hash, "start = %#llx,end = %#llx,hash = %#llx\n",
305 *start, *end, *hash);
306 CDEBUG(D_VFSTRACE, "page %lu [%llu %llu], hash %llu\n",
307 offset, *start, *end, *hash);
308 if (*hash > *end) {
309 ll_release_page(page, 0);
310 page = NULL;
311 } else if (*end != *start && *hash == *end) {
312 /*
313 * upon hash collision, remove this page,
314 * otherwise put page reference, and
315 * ll_get_dir_page() will issue RPC to fetch
316 * the page we want.
317 */
318 ll_release_page(page,
319 le32_to_cpu(dp->ldp_flags) & LDF_COLLIDE);
320 page = NULL;
321 }
322 } else {
323 page_cache_release(page);
324 page = ERR_PTR(-EIO);
325 }
326
327 } else {
328 spin_unlock_irq(&mapping->tree_lock);
329 page = NULL;
330 }
331 return page;
332 }
333
ll_get_dir_page(struct inode * dir,__u64 hash,struct ll_dir_chain * chain)334 struct page *ll_get_dir_page(struct inode *dir, __u64 hash,
335 struct ll_dir_chain *chain)
336 {
337 ldlm_policy_data_t policy = {.l_inodebits = {MDS_INODELOCK_UPDATE} };
338 struct address_space *mapping = dir->i_mapping;
339 struct lustre_handle lockh;
340 struct lu_dirpage *dp;
341 struct page *page;
342 ldlm_mode_t mode;
343 int rc;
344 __u64 start = 0;
345 __u64 end = 0;
346 __u64 lhash = hash;
347 struct ll_inode_info *lli = ll_i2info(dir);
348 int hash64 = ll_i2sbi(dir)->ll_flags & LL_SBI_64BIT_HASH;
349
350 mode = LCK_PR;
351 rc = md_lock_match(ll_i2sbi(dir)->ll_md_exp, LDLM_FL_BLOCK_GRANTED,
352 ll_inode2fid(dir), LDLM_IBITS, &policy, mode, &lockh);
353 if (!rc) {
354 struct ldlm_enqueue_info einfo = {
355 .ei_type = LDLM_IBITS,
356 .ei_mode = mode,
357 .ei_cb_bl = ll_md_blocking_ast,
358 .ei_cb_cp = ldlm_completion_ast,
359 };
360 struct lookup_intent it = { .it_op = IT_READDIR };
361 struct ptlrpc_request *request;
362 struct md_op_data *op_data;
363
364 op_data = ll_prep_md_op_data(NULL, dir, dir, NULL, 0, 0,
365 LUSTRE_OPC_ANY, NULL);
366 if (IS_ERR(op_data))
367 return (void *)op_data;
368
369 rc = md_enqueue(ll_i2sbi(dir)->ll_md_exp, &einfo, &it,
370 op_data, &lockh, NULL, 0, NULL, 0);
371
372 ll_finish_md_op_data(op_data);
373
374 request = (struct ptlrpc_request *)it.d.lustre.it_data;
375 if (request)
376 ptlrpc_req_finished(request);
377 if (rc < 0) {
378 CERROR("lock enqueue: "DFID" at %llu: rc %d\n",
379 PFID(ll_inode2fid(dir)), hash, rc);
380 return ERR_PTR(rc);
381 }
382
383 CDEBUG(D_INODE, "setting lr_lvb_inode to inode %p (%lu/%u)\n",
384 dir, dir->i_ino, dir->i_generation);
385 md_set_lock_data(ll_i2sbi(dir)->ll_md_exp,
386 &it.d.lustre.it_lock_handle, dir, NULL);
387 } else {
388 /* for cross-ref object, l_ast_data of the lock may not be set,
389 * we reset it here */
390 md_set_lock_data(ll_i2sbi(dir)->ll_md_exp, &lockh.cookie,
391 dir, NULL);
392 }
393 ldlm_lock_dump_handle(D_OTHER, &lockh);
394
395 mutex_lock(&lli->lli_readdir_mutex);
396 page = ll_dir_page_locate(dir, &lhash, &start, &end);
397 if (IS_ERR(page)) {
398 CERROR("dir page locate: "DFID" at %llu: rc %ld\n",
399 PFID(ll_inode2fid(dir)), lhash, PTR_ERR(page));
400 goto out_unlock;
401 } else if (page != NULL) {
402 /*
403 * XXX nikita: not entirely correct handling of a corner case:
404 * suppose hash chain of entries with hash value HASH crosses
405 * border between pages P0 and P1. First both P0 and P1 are
406 * cached, seekdir() is called for some entry from the P0 part
407 * of the chain. Later P0 goes out of cache. telldir(HASH)
408 * happens and finds P1, as it starts with matching hash
409 * value. Remaining entries from P0 part of the chain are
410 * skipped. (Is that really a bug?)
411 *
412 * Possible solutions: 0. don't cache P1 is such case, handle
413 * it as an "overflow" page. 1. invalidate all pages at
414 * once. 2. use HASH|1 as an index for P1.
415 */
416 goto hash_collision;
417 }
418
419 page = read_cache_page(mapping, hash_x_index(hash, hash64),
420 ll_dir_filler, &lhash);
421 if (IS_ERR(page)) {
422 CERROR("read cache page: "DFID" at %llu: rc %ld\n",
423 PFID(ll_inode2fid(dir)), hash, PTR_ERR(page));
424 goto out_unlock;
425 }
426
427 wait_on_page_locked(page);
428 (void)kmap(page);
429 if (!PageUptodate(page)) {
430 CERROR("page not updated: "DFID" at %llu: rc %d\n",
431 PFID(ll_inode2fid(dir)), hash, -5);
432 goto fail;
433 }
434 if (!PageChecked(page))
435 ll_check_page(dir, page);
436 if (PageError(page)) {
437 CERROR("page error: "DFID" at %llu: rc %d\n",
438 PFID(ll_inode2fid(dir)), hash, -5);
439 goto fail;
440 }
441 hash_collision:
442 dp = page_address(page);
443 if (BITS_PER_LONG == 32 && hash64) {
444 start = le64_to_cpu(dp->ldp_hash_start) >> 32;
445 end = le64_to_cpu(dp->ldp_hash_end) >> 32;
446 lhash = hash >> 32;
447 } else {
448 start = le64_to_cpu(dp->ldp_hash_start);
449 end = le64_to_cpu(dp->ldp_hash_end);
450 lhash = hash;
451 }
452 if (end == start) {
453 LASSERT(start == lhash);
454 CWARN("Page-wide hash collision: %llu\n", end);
455 if (BITS_PER_LONG == 32 && hash64)
456 CWARN("Real page-wide hash collision at [%llu %llu] with hash %llu\n",
457 le64_to_cpu(dp->ldp_hash_start),
458 le64_to_cpu(dp->ldp_hash_end), hash);
459 /*
460 * Fetch whole overflow chain...
461 *
462 * XXX not yet.
463 */
464 goto fail;
465 }
466 out_unlock:
467 mutex_unlock(&lli->lli_readdir_mutex);
468 ldlm_lock_decref(&lockh, mode);
469 return page;
470
471 fail:
472 ll_release_page(page, 1);
473 page = ERR_PTR(-EIO);
474 goto out_unlock;
475 }
476
ll_dir_read(struct inode * inode,struct dir_context * ctx)477 int ll_dir_read(struct inode *inode, struct dir_context *ctx)
478 {
479 struct ll_inode_info *info = ll_i2info(inode);
480 struct ll_sb_info *sbi = ll_i2sbi(inode);
481 __u64 pos = ctx->pos;
482 int api32 = ll_need_32bit_api(sbi);
483 int hash64 = sbi->ll_flags & LL_SBI_64BIT_HASH;
484 struct page *page;
485 struct ll_dir_chain chain;
486 int done = 0;
487 int rc = 0;
488
489 ll_dir_chain_init(&chain);
490
491 page = ll_get_dir_page(inode, pos, &chain);
492
493 while (rc == 0 && !done) {
494 struct lu_dirpage *dp;
495 struct lu_dirent *ent;
496
497 if (!IS_ERR(page)) {
498 /*
499 * If page is empty (end of directory is reached),
500 * use this value.
501 */
502 __u64 hash = MDS_DIR_END_OFF;
503 __u64 next;
504
505 dp = page_address(page);
506 for (ent = lu_dirent_start(dp); ent != NULL && !done;
507 ent = lu_dirent_next(ent)) {
508 __u16 type;
509 int namelen;
510 struct lu_fid fid;
511 __u64 lhash;
512 __u64 ino;
513
514 /*
515 * XXX: implement correct swabbing here.
516 */
517
518 hash = le64_to_cpu(ent->lde_hash);
519 if (hash < pos)
520 /*
521 * Skip until we find target hash
522 * value.
523 */
524 continue;
525
526 namelen = le16_to_cpu(ent->lde_namelen);
527 if (namelen == 0)
528 /*
529 * Skip dummy record.
530 */
531 continue;
532
533 if (api32 && hash64)
534 lhash = hash >> 32;
535 else
536 lhash = hash;
537 fid_le_to_cpu(&fid, &ent->lde_fid);
538 ino = cl_fid_build_ino(&fid, api32);
539 type = ll_dirent_type_get(ent);
540 ctx->pos = lhash;
541 /* For 'll_nfs_get_name_filldir()', it will try
542 * to access the 'ent' through its 'lde_name',
543 * so the parameter 'name' for 'ctx->actor()'
544 * must be part of the 'ent'.
545 */
546 done = !dir_emit(ctx, ent->lde_name,
547 namelen, ino, type);
548 }
549 next = le64_to_cpu(dp->ldp_hash_end);
550 if (!done) {
551 pos = next;
552 if (pos == MDS_DIR_END_OFF) {
553 /*
554 * End of directory reached.
555 */
556 done = 1;
557 ll_release_page(page, 0);
558 } else if (1 /* chain is exhausted*/) {
559 /*
560 * Normal case: continue to the next
561 * page.
562 */
563 ll_release_page(page,
564 le32_to_cpu(dp->ldp_flags) &
565 LDF_COLLIDE);
566 next = pos;
567 page = ll_get_dir_page(inode, pos,
568 &chain);
569 } else {
570 /*
571 * go into overflow page.
572 */
573 LASSERT(le32_to_cpu(dp->ldp_flags) &
574 LDF_COLLIDE);
575 ll_release_page(page, 1);
576 }
577 } else {
578 pos = hash;
579 ll_release_page(page, 0);
580 }
581 } else {
582 rc = PTR_ERR(page);
583 CERROR("error reading dir "DFID" at %lu: rc %d\n",
584 PFID(&info->lli_fid), (unsigned long)pos, rc);
585 }
586 }
587
588 ctx->pos = pos;
589 ll_dir_chain_fini(&chain);
590 return rc;
591 }
592
ll_readdir(struct file * filp,struct dir_context * ctx)593 static int ll_readdir(struct file *filp, struct dir_context *ctx)
594 {
595 struct inode *inode = file_inode(filp);
596 struct ll_file_data *lfd = LUSTRE_FPRIVATE(filp);
597 struct ll_sb_info *sbi = ll_i2sbi(inode);
598 int hash64 = sbi->ll_flags & LL_SBI_64BIT_HASH;
599 int api32 = ll_need_32bit_api(sbi);
600 int rc;
601
602 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p) pos %lu/%llu 32bit_api %d\n",
603 inode->i_ino, inode->i_generation,
604 inode, (unsigned long)lfd->lfd_pos, i_size_read(inode), api32);
605
606 if (lfd->lfd_pos == MDS_DIR_END_OFF) {
607 /*
608 * end-of-file.
609 */
610 rc = 0;
611 goto out;
612 }
613
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) {
618 if (api32)
619 ctx->pos = LL_DIR_END_OFF_32BIT;
620 else
621 ctx->pos = LL_DIR_END_OFF;
622 } else {
623 if (api32 && hash64)
624 ctx->pos >>= 32;
625 }
626 filp->f_version = inode->i_version;
627
628 out:
629 if (!rc)
630 ll_stats_ops_tally(sbi, LPROC_LL_READDIR, 1);
631
632 return rc;
633 }
634
ll_send_mgc_param(struct obd_export * mgc,char * string)635 static int ll_send_mgc_param(struct obd_export *mgc, char *string)
636 {
637 struct mgs_send_param *msp;
638 int rc = 0;
639
640 msp = kzalloc(sizeof(*msp), GFP_NOFS);
641 if (!msp)
642 return -ENOMEM;
643
644 strlcpy(msp->mgs_param, string, sizeof(msp->mgs_param));
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 kfree(msp);
650
651 return rc;
652 }
653
ll_dir_setdirstripe(struct inode * dir,struct lmv_user_md * lump,char * filename)654 static int 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
663 mode = (~current_umask() & 0755) | 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 err = PTR_ERR(op_data);
669 goto err_exit;
670 }
671
672 op_data->op_cli_flags |= CLI_SET_MEA;
673 err = md_create(sbi->ll_md_exp, op_data, lump, sizeof(*lump), mode,
674 from_kuid(&init_user_ns, current_fsuid()),
675 from_kgid(&init_user_ns, current_fsgid()),
676 cfs_curproc_cap_pack(), 0, &request);
677 ll_finish_md_op_data(op_data);
678 if (err)
679 goto err_exit;
680 err_exit:
681 ptlrpc_req_finished(request);
682 return err;
683 }
684
ll_dir_setstripe(struct inode * inode,struct lov_user_md * lump,int set_default)685 int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
686 int set_default)
687 {
688 struct ll_sb_info *sbi = ll_i2sbi(inode);
689 struct md_op_data *op_data;
690 struct ptlrpc_request *req = NULL;
691 int rc = 0;
692 struct lustre_sb_info *lsi = s2lsi(inode->i_sb);
693 struct obd_device *mgc = lsi->lsi_mgc;
694 int lum_size;
695
696 if (lump != NULL) {
697 /*
698 * This is coming from userspace, so should be in
699 * local endian. But the MDS would like it in little
700 * endian, so we swab it before we send it.
701 */
702 switch (lump->lmm_magic) {
703 case LOV_USER_MAGIC_V1: {
704 if (lump->lmm_magic != cpu_to_le32(LOV_USER_MAGIC_V1))
705 lustre_swab_lov_user_md_v1(lump);
706 lum_size = sizeof(struct lov_user_md_v1);
707 break;
708 }
709 case LOV_USER_MAGIC_V3: {
710 if (lump->lmm_magic != cpu_to_le32(LOV_USER_MAGIC_V3))
711 lustre_swab_lov_user_md_v3(
712 (struct lov_user_md_v3 *)lump);
713 lum_size = sizeof(struct lov_user_md_v3);
714 break;
715 }
716 default: {
717 CDEBUG(D_IOCTL, "bad userland LOV MAGIC: %#08x != %#08x nor %#08x\n",
718 lump->lmm_magic, LOV_USER_MAGIC_V1,
719 LOV_USER_MAGIC_V3);
720 return -EINVAL;
721 }
722 }
723 } else {
724 lum_size = sizeof(struct lov_user_md_v1);
725 }
726
727 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
728 LUSTRE_OPC_ANY, NULL);
729 if (IS_ERR(op_data))
730 return PTR_ERR(op_data);
731
732 if (lump != NULL && lump->lmm_magic == cpu_to_le32(LMV_USER_MAGIC))
733 op_data->op_cli_flags |= CLI_SET_MEA;
734
735 /* swabbing is done in lov_setstripe() on server side */
736 rc = md_setattr(sbi->ll_md_exp, op_data, lump, lum_size,
737 NULL, 0, &req, NULL);
738 ll_finish_md_op_data(op_data);
739 ptlrpc_req_finished(req);
740 if (rc) {
741 if (rc != -EPERM && rc != -EACCES)
742 CERROR("mdc_setattr fails: rc = %d\n", rc);
743 }
744
745 /* In the following we use the fact that LOV_USER_MAGIC_V1 and
746 LOV_USER_MAGIC_V3 have the same initial fields so we do not
747 need to make the distinction between the 2 versions */
748 if (set_default && mgc->u.cli.cl_mgc_mgsexp) {
749 char *param = NULL;
750 char *buf;
751
752 param = kzalloc(MGS_PARAM_MAXLEN, GFP_NOFS);
753 if (!param)
754 return -ENOMEM;
755
756 buf = param;
757 /* Get fsname and assume devname to be -MDT0000. */
758 ll_get_fsname(inode->i_sb, buf, MTI_NAME_MAXLEN);
759 strcat(buf, "-MDT0000.lov");
760 buf += strlen(buf);
761
762 /* Set root stripesize */
763 sprintf(buf, ".stripesize=%u",
764 lump ? le32_to_cpu(lump->lmm_stripe_size) : 0);
765 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
766 if (rc)
767 goto end;
768
769 /* Set root stripecount */
770 sprintf(buf, ".stripecount=%hd",
771 lump ? le16_to_cpu(lump->lmm_stripe_count) : 0);
772 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
773 if (rc)
774 goto end;
775
776 /* Set root stripeoffset */
777 sprintf(buf, ".stripeoffset=%hd",
778 lump ? le16_to_cpu(lump->lmm_stripe_offset) :
779 (typeof(lump->lmm_stripe_offset))(-1));
780 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
781
782 end:
783 kfree(param);
784 }
785 return rc;
786 }
787
ll_dir_getstripe(struct inode * inode,struct lov_mds_md ** lmmp,int * lmm_size,struct ptlrpc_request ** request)788 int 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_default_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 %lu/%u: rc %d\n",
813 inode->i_ino,
814 inode->i_generation, rc);
815 goto out;
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 rc = -ENODATA;
826 goto out;
827 }
828
829 lmm = req_capsule_server_sized_get(&req->rq_pill,
830 &RMF_MDT_MD, lmmsize);
831 LASSERT(lmm != NULL);
832
833 /*
834 * This is coming from the MDS, so is probably in
835 * little endian. We convert it to host endian before
836 * passing it to userspace.
837 */
838 /* We don't swab objects for directories */
839 switch (le32_to_cpu(lmm->lmm_magic)) {
840 case LOV_MAGIC_V1:
841 if (cpu_to_le32(LOV_MAGIC) != LOV_MAGIC)
842 lustre_swab_lov_user_md_v1((struct lov_user_md_v1 *)lmm);
843 break;
844 case LOV_MAGIC_V3:
845 if (cpu_to_le32(LOV_MAGIC) != LOV_MAGIC)
846 lustre_swab_lov_user_md_v3((struct lov_user_md_v3 *)lmm);
847 break;
848 default:
849 CERROR("unknown magic: %lX\n", (unsigned long)lmm->lmm_magic);
850 rc = -EPROTO;
851 }
852 out:
853 *lmmp = lmm;
854 *lmm_size = lmmsize;
855 *request = req;
856 return rc;
857 }
858
859 /*
860 * Get MDT index for the inode.
861 */
ll_get_mdt_idx(struct inode * inode)862 int ll_get_mdt_idx(struct inode *inode)
863 {
864 struct ll_sb_info *sbi = ll_i2sbi(inode);
865 struct md_op_data *op_data;
866 int rc, mdtidx;
867
868 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0,
869 0, LUSTRE_OPC_ANY, NULL);
870 if (IS_ERR(op_data))
871 return PTR_ERR(op_data);
872
873 op_data->op_flags |= MF_GET_MDT_IDX;
874 rc = md_getattr(sbi->ll_md_exp, op_data, NULL);
875 mdtidx = op_data->op_mds;
876 ll_finish_md_op_data(op_data);
877 if (rc < 0) {
878 CDEBUG(D_INFO, "md_getattr_name: %d\n", rc);
879 return rc;
880 }
881 return mdtidx;
882 }
883
884 /**
885 * Generic handler to do any pre-copy work.
886 *
887 * It send a first hsm_progress (with extent length == 0) to coordinator as a
888 * first information for it that real work has started.
889 *
890 * Moreover, for a ARCHIVE request, it will sample the file data version and
891 * store it in \a copy.
892 *
893 * \return 0 on success.
894 */
ll_ioc_copy_start(struct super_block * sb,struct hsm_copy * copy)895 static int ll_ioc_copy_start(struct super_block *sb, struct hsm_copy *copy)
896 {
897 struct ll_sb_info *sbi = ll_s2sbi(sb);
898 struct hsm_progress_kernel hpk;
899 int rc;
900
901 /* Forge a hsm_progress based on data from copy. */
902 hpk.hpk_fid = copy->hc_hai.hai_fid;
903 hpk.hpk_cookie = copy->hc_hai.hai_cookie;
904 hpk.hpk_extent.offset = copy->hc_hai.hai_extent.offset;
905 hpk.hpk_extent.length = 0;
906 hpk.hpk_flags = 0;
907 hpk.hpk_errval = 0;
908 hpk.hpk_data_version = 0;
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, ©->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 rc = PTR_ERR(inode);
922 goto progress;
923 }
924
925 /* Read current file data version */
926 rc = ll_data_version(inode, &data_version, 1);
927 iput(inode);
928 if (rc != 0) {
929 CDEBUG(D_HSM, "Could not read file data version of "
930 DFID" (rc = %d). Archive request (%#llx) could not be done.\n",
931 PFID(©->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;
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
944 progress:
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 */
ll_ioc_copy_end(struct super_block * sb,struct hsm_copy * copy)966 static 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;
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, ©->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 rc = PTR_ERR(inode);
1003 goto progress;
1004 }
1005
1006 rc = ll_data_version(inode, &data_version,
1007 copy->hc_hai.hai_action == HSMA_ARCHIVE);
1008 iput(inode);
1009 if (rc) {
1010 CDEBUG(D_HSM, "Could not read file data version. Request could not be confirmed.\n");
1011 if (hpk.hpk_errval == 0)
1012 hpk.hpk_errval = -rc;
1013 goto progress;
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. File content was changed during archiving. "
1025 DFID", start:%#llx current:%#llx\n",
1026 PFID(©->hc_hai.hai_fid),
1027 copy->hc_data_version, data_version);
1028 /* File was changed, send error to cdt. Do not ask for
1029 * retry because if a file is modified frequently,
1030 * the cdt will loop on retried archive requests.
1031 * The policy engine will ask for a new archive later
1032 * when the file will not be modified for some tunable
1033 * time */
1034 /* we do not notify caller */
1035 hpk.hpk_flags &= ~HP_FLAG_RETRY;
1036 /* hpk_errval must be >= 0 */
1037 hpk.hpk_errval = EBUSY;
1038 }
1039
1040 }
1041
1042 progress:
1043 rc = obd_iocontrol(LL_IOC_HSM_PROGRESS, sbi->ll_md_exp, sizeof(hpk),
1044 &hpk, NULL);
1045
1046 return rc;
1047 }
1048
copy_and_ioctl(int cmd,struct obd_export * exp,const void __user * data,size_t size)1049 static int copy_and_ioctl(int cmd, struct obd_export *exp,
1050 const void __user *data, size_t size)
1051 {
1052 void *copy;
1053 int rc;
1054
1055 copy = kzalloc(size, GFP_NOFS);
1056 if (!copy)
1057 return -ENOMEM;
1058
1059 if (copy_from_user(copy, data, size)) {
1060 rc = -EFAULT;
1061 goto out;
1062 }
1063
1064 rc = obd_iocontrol(cmd, exp, size, copy, NULL);
1065 out:
1066 kfree(copy);
1067
1068 return rc;
1069 }
1070
quotactl_ioctl(struct ll_sb_info * sbi,struct if_quotactl * qctl)1071 static int quotactl_ioctl(struct ll_sb_info *sbi, struct if_quotactl *qctl)
1072 {
1073 int cmd = qctl->qc_cmd;
1074 int type = qctl->qc_type;
1075 int id = qctl->qc_id;
1076 int valid = qctl->qc_valid;
1077 int rc = 0;
1078
1079 switch (cmd) {
1080 case LUSTRE_Q_INVALIDATE:
1081 case LUSTRE_Q_FINVALIDATE:
1082 case Q_QUOTAON:
1083 case Q_QUOTAOFF:
1084 case Q_SETQUOTA:
1085 case Q_SETINFO:
1086 if (!capable(CFS_CAP_SYS_ADMIN) ||
1087 sbi->ll_flags & LL_SBI_RMT_CLIENT)
1088 return -EPERM;
1089 break;
1090 case Q_GETQUOTA:
1091 if (((type == USRQUOTA &&
1092 !uid_eq(current_euid(), make_kuid(&init_user_ns, id))) ||
1093 (type == GRPQUOTA &&
1094 !in_egroup_p(make_kgid(&init_user_ns, id)))) &&
1095 (!capable(CFS_CAP_SYS_ADMIN) ||
1096 sbi->ll_flags & LL_SBI_RMT_CLIENT))
1097 return -EPERM;
1098 break;
1099 case Q_GETINFO:
1100 break;
1101 default:
1102 CERROR("unsupported quotactl op: %#x\n", cmd);
1103 return -ENOTTY;
1104 }
1105
1106 if (valid != QC_GENERAL) {
1107 if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
1108 return -EOPNOTSUPP;
1109
1110 if (cmd == Q_GETINFO)
1111 qctl->qc_cmd = Q_GETOINFO;
1112 else if (cmd == Q_GETQUOTA)
1113 qctl->qc_cmd = Q_GETOQUOTA;
1114 else
1115 return -EINVAL;
1116
1117 switch (valid) {
1118 case QC_MDTIDX:
1119 rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
1120 sizeof(*qctl), qctl, NULL);
1121 break;
1122 case QC_OSTIDX:
1123 rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_dt_exp,
1124 sizeof(*qctl), qctl, NULL);
1125 break;
1126 case QC_UUID:
1127 rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
1128 sizeof(*qctl), qctl, NULL);
1129 if (rc == -EAGAIN)
1130 rc = obd_iocontrol(OBD_IOC_QUOTACTL,
1131 sbi->ll_dt_exp,
1132 sizeof(*qctl), qctl, NULL);
1133 break;
1134 default:
1135 rc = -EINVAL;
1136 break;
1137 }
1138
1139 if (rc)
1140 return rc;
1141
1142 qctl->qc_cmd = cmd;
1143 } else {
1144 struct obd_quotactl *oqctl;
1145
1146 oqctl = kzalloc(sizeof(*oqctl), GFP_NOFS);
1147 if (!oqctl)
1148 return -ENOMEM;
1149
1150 QCTL_COPY(oqctl, qctl);
1151 rc = obd_quotactl(sbi->ll_md_exp, oqctl);
1152 if (rc) {
1153 if (rc != -EALREADY && cmd == Q_QUOTAON) {
1154 oqctl->qc_cmd = Q_QUOTAOFF;
1155 obd_quotactl(sbi->ll_md_exp, oqctl);
1156 }
1157 kfree(oqctl);
1158 return rc;
1159 }
1160 /* If QIF_SPACE is not set, client should collect the
1161 * space usage from OSSs by itself */
1162 if (cmd == Q_GETQUOTA &&
1163 !(oqctl->qc_dqblk.dqb_valid & QIF_SPACE) &&
1164 !oqctl->qc_dqblk.dqb_curspace) {
1165 struct obd_quotactl *oqctl_tmp;
1166
1167 oqctl_tmp = kzalloc(sizeof(*oqctl_tmp), GFP_NOFS);
1168 if (!oqctl_tmp) {
1169 rc = -ENOMEM;
1170 goto out;
1171 }
1172
1173 oqctl_tmp->qc_cmd = Q_GETOQUOTA;
1174 oqctl_tmp->qc_id = oqctl->qc_id;
1175 oqctl_tmp->qc_type = oqctl->qc_type;
1176
1177 /* collect space usage from OSTs */
1178 oqctl_tmp->qc_dqblk.dqb_curspace = 0;
1179 rc = obd_quotactl(sbi->ll_dt_exp, oqctl_tmp);
1180 if (!rc || rc == -EREMOTEIO) {
1181 oqctl->qc_dqblk.dqb_curspace =
1182 oqctl_tmp->qc_dqblk.dqb_curspace;
1183 oqctl->qc_dqblk.dqb_valid |= QIF_SPACE;
1184 }
1185
1186 /* collect space & inode usage from MDTs */
1187 oqctl_tmp->qc_dqblk.dqb_curspace = 0;
1188 oqctl_tmp->qc_dqblk.dqb_curinodes = 0;
1189 rc = obd_quotactl(sbi->ll_md_exp, oqctl_tmp);
1190 if (!rc || rc == -EREMOTEIO) {
1191 oqctl->qc_dqblk.dqb_curspace +=
1192 oqctl_tmp->qc_dqblk.dqb_curspace;
1193 oqctl->qc_dqblk.dqb_curinodes =
1194 oqctl_tmp->qc_dqblk.dqb_curinodes;
1195 oqctl->qc_dqblk.dqb_valid |= QIF_INODES;
1196 } else {
1197 oqctl->qc_dqblk.dqb_valid &= ~QIF_SPACE;
1198 }
1199
1200 kfree(oqctl_tmp);
1201 }
1202 out:
1203 QCTL_COPY(qctl, oqctl);
1204 kfree(oqctl);
1205 }
1206
1207 return rc;
1208 }
1209
1210 /* This function tries to get a single name component,
1211 * to send to the server. No actual path traversal involved,
1212 * so we limit to NAME_MAX */
ll_getname(const char __user * filename)1213 static char *ll_getname(const char __user *filename)
1214 {
1215 int ret = 0, len;
1216 char *tmp;
1217
1218 tmp = kzalloc(NAME_MAX + 1, GFP_KERNEL);
1219 if (!tmp)
1220 return ERR_PTR(-ENOMEM);
1221
1222 len = strncpy_from_user(tmp, filename, NAME_MAX + 1);
1223 if (len < 0)
1224 ret = len;
1225 else if (len == 0)
1226 ret = -ENOENT;
1227 else if (len > NAME_MAX && tmp[NAME_MAX] != 0)
1228 ret = -ENAMETOOLONG;
1229
1230 if (ret) {
1231 kfree(tmp);
1232 tmp = ERR_PTR(ret);
1233 }
1234 return tmp;
1235 }
1236
1237 #define ll_putname(filename) kfree(filename)
1238
ll_dir_ioctl(struct file * file,unsigned int cmd,unsigned long arg)1239 static long ll_dir_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1240 {
1241 struct inode *inode = file_inode(file);
1242 struct ll_sb_info *sbi = ll_i2sbi(inode);
1243 struct obd_ioctl_data *data;
1244 int rc = 0;
1245
1246 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), cmd=%#x\n",
1247 inode->i_ino, inode->i_generation, inode, cmd);
1248
1249 /* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */
1250 if (_IOC_TYPE(cmd) == 'T' || _IOC_TYPE(cmd) == 't') /* tty ioctls */
1251 return -ENOTTY;
1252
1253 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_IOCTL, 1);
1254 switch (cmd) {
1255 case FSFILT_IOC_GETFLAGS:
1256 case FSFILT_IOC_SETFLAGS:
1257 return ll_iocontrol(inode, file, cmd, arg);
1258 case FSFILT_IOC_GETVERSION_OLD:
1259 case FSFILT_IOC_GETVERSION:
1260 return put_user(inode->i_generation, (int *)arg);
1261 /* We need to special case any other ioctls we want to handle,
1262 * to send them to the MDS/OST as appropriate and to properly
1263 * network encode the arg field.
1264 case FSFILT_IOC_SETVERSION_OLD:
1265 case FSFILT_IOC_SETVERSION:
1266 */
1267 case LL_IOC_GET_MDTIDX: {
1268 int mdtidx;
1269
1270 mdtidx = ll_get_mdt_idx(inode);
1271 if (mdtidx < 0)
1272 return mdtidx;
1273
1274 if (put_user((int)mdtidx, (int *)arg))
1275 return -EFAULT;
1276
1277 return 0;
1278 }
1279 case IOC_MDC_LOOKUP: {
1280 struct ptlrpc_request *request = NULL;
1281 int namelen, len = 0;
1282 char *buf = NULL;
1283 char *filename;
1284 struct md_op_data *op_data;
1285
1286 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
1287 if (rc)
1288 return rc;
1289 data = (void *)buf;
1290
1291 filename = data->ioc_inlbuf1;
1292 namelen = strlen(filename);
1293
1294 if (namelen < 1) {
1295 CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
1296 rc = -EINVAL;
1297 goto out_free;
1298 }
1299
1300 op_data = ll_prep_md_op_data(NULL, inode, NULL, filename, namelen,
1301 0, LUSTRE_OPC_ANY, NULL);
1302 if (IS_ERR(op_data)) {
1303 rc = PTR_ERR(op_data);
1304 goto out_free;
1305 }
1306
1307 op_data->op_valid = OBD_MD_FLID;
1308 rc = md_getattr_name(sbi->ll_md_exp, op_data, &request);
1309 ll_finish_md_op_data(op_data);
1310 if (rc < 0) {
1311 CDEBUG(D_INFO, "md_getattr_name: %d\n", rc);
1312 goto out_free;
1313 }
1314 ptlrpc_req_finished(request);
1315 out_free:
1316 obd_ioctl_freedata(buf, len);
1317 return rc;
1318 }
1319 case LL_IOC_LMV_SETSTRIPE: {
1320 struct lmv_user_md *lum;
1321 char *buf = NULL;
1322 char *filename;
1323 int namelen = 0;
1324 int lumlen = 0;
1325 int len;
1326 int rc;
1327
1328 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
1329 if (rc)
1330 return rc;
1331
1332 data = (void *)buf;
1333 if (data->ioc_inlbuf1 == NULL || data->ioc_inlbuf2 == NULL ||
1334 data->ioc_inllen1 == 0 || data->ioc_inllen2 == 0) {
1335 rc = -EINVAL;
1336 goto lmv_out_free;
1337 }
1338
1339 filename = data->ioc_inlbuf1;
1340 namelen = data->ioc_inllen1;
1341
1342 if (namelen < 1) {
1343 CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
1344 rc = -EINVAL;
1345 goto lmv_out_free;
1346 }
1347 lum = (struct lmv_user_md *)data->ioc_inlbuf2;
1348 lumlen = data->ioc_inllen2;
1349
1350 if (lum->lum_magic != LMV_USER_MAGIC ||
1351 lumlen != sizeof(*lum)) {
1352 CERROR("%s: wrong lum magic %x or size %d: rc = %d\n",
1353 filename, lum->lum_magic, lumlen, -EFAULT);
1354 rc = -EINVAL;
1355 goto lmv_out_free;
1356 }
1357
1358 /**
1359 * ll_dir_setdirstripe will be used to set dir stripe
1360 * mdc_create--->mdt_reint_create (with dirstripe)
1361 */
1362 rc = ll_dir_setdirstripe(inode, lum, filename);
1363 lmv_out_free:
1364 obd_ioctl_freedata(buf, len);
1365 return rc;
1366
1367 }
1368 case LL_IOC_LOV_SETSTRIPE: {
1369 struct lov_user_md_v3 lumv3;
1370 struct lov_user_md_v1 *lumv1 = (struct lov_user_md_v1 *)&lumv3;
1371 struct lov_user_md_v1 *lumv1p = (struct lov_user_md_v1 *)arg;
1372 struct lov_user_md_v3 *lumv3p = (struct lov_user_md_v3 *)arg;
1373
1374 int set_default = 0;
1375
1376 LASSERT(sizeof(lumv3) == sizeof(*lumv3p));
1377 LASSERT(sizeof(lumv3.lmm_objects[0]) ==
1378 sizeof(lumv3p->lmm_objects[0]));
1379 /* first try with v1 which is smaller than v3 */
1380 if (copy_from_user(lumv1, lumv1p, sizeof(*lumv1)))
1381 return -EFAULT;
1382
1383 if (lumv1->lmm_magic == LOV_USER_MAGIC_V3) {
1384 if (copy_from_user(&lumv3, lumv3p, sizeof(lumv3)))
1385 return -EFAULT;
1386 }
1387
1388 if (is_root_inode(inode))
1389 set_default = 1;
1390
1391 /* in v1 and v3 cases lumv1 points to data */
1392 rc = ll_dir_setstripe(inode, lumv1, set_default);
1393
1394 return rc;
1395 }
1396 case LL_IOC_LMV_GETSTRIPE: {
1397 struct lmv_user_md *lump = (struct lmv_user_md *)arg;
1398 struct lmv_user_md lum;
1399 struct lmv_user_md *tmp;
1400 int lum_size;
1401 int rc = 0;
1402 int mdtindex;
1403
1404 if (copy_from_user(&lum, lump, sizeof(struct lmv_user_md)))
1405 return -EFAULT;
1406
1407 if (lum.lum_magic != LMV_MAGIC_V1)
1408 return -EINVAL;
1409
1410 lum_size = lmv_user_md_size(1, LMV_MAGIC_V1);
1411 tmp = kzalloc(lum_size, GFP_NOFS);
1412 if (!tmp) {
1413 rc = -ENOMEM;
1414 goto free_lmv;
1415 }
1416
1417 *tmp = lum;
1418 tmp->lum_type = LMV_STRIPE_TYPE;
1419 tmp->lum_stripe_count = 1;
1420 mdtindex = ll_get_mdt_idx(inode);
1421 if (mdtindex < 0) {
1422 rc = -ENOMEM;
1423 goto free_lmv;
1424 }
1425
1426 tmp->lum_stripe_offset = mdtindex;
1427 tmp->lum_objects[0].lum_mds = mdtindex;
1428 memcpy(&tmp->lum_objects[0].lum_fid, ll_inode2fid(inode),
1429 sizeof(struct lu_fid));
1430 if (copy_to_user((void *)arg, tmp, lum_size)) {
1431 rc = -EFAULT;
1432 goto free_lmv;
1433 }
1434 free_lmv:
1435 kfree(tmp);
1436 return rc;
1437 }
1438 case LL_IOC_LOV_SWAP_LAYOUTS:
1439 return -EPERM;
1440 case LL_IOC_OBD_STATFS:
1441 return ll_obd_statfs(inode, (void *)arg);
1442 case LL_IOC_LOV_GETSTRIPE:
1443 case LL_IOC_MDC_GETINFO:
1444 case IOC_MDC_GETFILEINFO:
1445 case IOC_MDC_GETFILESTRIPE: {
1446 struct ptlrpc_request *request = NULL;
1447 struct lov_user_md *lump;
1448 struct lov_mds_md *lmm = NULL;
1449 struct mdt_body *body;
1450 char *filename = NULL;
1451 int lmmsize;
1452
1453 if (cmd == IOC_MDC_GETFILEINFO ||
1454 cmd == IOC_MDC_GETFILESTRIPE) {
1455 filename = ll_getname((const char *)arg);
1456 if (IS_ERR(filename))
1457 return PTR_ERR(filename);
1458
1459 rc = ll_lov_getstripe_ea_info(inode, filename, &lmm,
1460 &lmmsize, &request);
1461 } else {
1462 rc = ll_dir_getstripe(inode, &lmm, &lmmsize, &request);
1463 }
1464
1465 if (request) {
1466 body = req_capsule_server_get(&request->rq_pill,
1467 &RMF_MDT_BODY);
1468 LASSERT(body != NULL);
1469 } else {
1470 goto out_req;
1471 }
1472
1473 if (rc < 0) {
1474 if (rc == -ENODATA && (cmd == IOC_MDC_GETFILEINFO ||
1475 cmd == LL_IOC_MDC_GETINFO)) {
1476 rc = 0;
1477 goto skip_lmm;
1478 } else
1479 goto out_req;
1480 }
1481
1482 if (cmd == IOC_MDC_GETFILESTRIPE ||
1483 cmd == LL_IOC_LOV_GETSTRIPE) {
1484 lump = (struct lov_user_md *)arg;
1485 } else {
1486 struct lov_user_mds_data *lmdp;
1487
1488 lmdp = (struct lov_user_mds_data *)arg;
1489 lump = &lmdp->lmd_lmm;
1490 }
1491 if (copy_to_user(lump, lmm, lmmsize)) {
1492 if (copy_to_user(lump, lmm, sizeof(*lump))) {
1493 rc = -EFAULT;
1494 goto out_req;
1495 }
1496 rc = -EOVERFLOW;
1497 }
1498 skip_lmm:
1499 if (cmd == IOC_MDC_GETFILEINFO || cmd == LL_IOC_MDC_GETINFO) {
1500 struct lov_user_mds_data *lmdp;
1501 lstat_t st = { 0 };
1502
1503 st.st_dev = inode->i_sb->s_dev;
1504 st.st_mode = body->mode;
1505 st.st_nlink = body->nlink;
1506 st.st_uid = body->uid;
1507 st.st_gid = body->gid;
1508 st.st_rdev = body->rdev;
1509 st.st_size = body->size;
1510 st.st_blksize = PAGE_CACHE_SIZE;
1511 st.st_blocks = body->blocks;
1512 st.st_atime = body->atime;
1513 st.st_mtime = body->mtime;
1514 st.st_ctime = body->ctime;
1515 st.st_ino = inode->i_ino;
1516
1517 lmdp = (struct lov_user_mds_data *)arg;
1518 if (copy_to_user(&lmdp->lmd_st, &st, sizeof(st))) {
1519 rc = -EFAULT;
1520 goto out_req;
1521 }
1522 }
1523
1524 out_req:
1525 ptlrpc_req_finished(request);
1526 if (filename)
1527 ll_putname(filename);
1528 return rc;
1529 }
1530 case IOC_LOV_GETINFO: {
1531 struct lov_user_mds_data *lumd;
1532 struct lov_stripe_md *lsm;
1533 struct lov_user_md *lum;
1534 struct lov_mds_md *lmm;
1535 int lmmsize;
1536 lstat_t st;
1537
1538 lumd = (struct lov_user_mds_data *)arg;
1539 lum = &lumd->lmd_lmm;
1540
1541 rc = ll_get_max_mdsize(sbi, &lmmsize);
1542 if (rc)
1543 return rc;
1544
1545 lmm = libcfs_kvzalloc(lmmsize, GFP_NOFS);
1546 if (lmm == NULL)
1547 return -ENOMEM;
1548 if (copy_from_user(lmm, lum, lmmsize)) {
1549 rc = -EFAULT;
1550 goto free_lmm;
1551 }
1552
1553 switch (lmm->lmm_magic) {
1554 case LOV_USER_MAGIC_V1:
1555 if (cpu_to_le32(LOV_USER_MAGIC_V1) == LOV_USER_MAGIC_V1)
1556 break;
1557 /* swab objects first so that stripes num will be sane */
1558 lustre_swab_lov_user_md_objects(
1559 ((struct lov_user_md_v1 *)lmm)->lmm_objects,
1560 ((struct lov_user_md_v1 *)lmm)->lmm_stripe_count);
1561 lustre_swab_lov_user_md_v1((struct lov_user_md_v1 *)lmm);
1562 break;
1563 case LOV_USER_MAGIC_V3:
1564 if (cpu_to_le32(LOV_USER_MAGIC_V3) == LOV_USER_MAGIC_V3)
1565 break;
1566 /* swab objects first so that stripes num will be sane */
1567 lustre_swab_lov_user_md_objects(
1568 ((struct lov_user_md_v3 *)lmm)->lmm_objects,
1569 ((struct lov_user_md_v3 *)lmm)->lmm_stripe_count);
1570 lustre_swab_lov_user_md_v3((struct lov_user_md_v3 *)lmm);
1571 break;
1572 default:
1573 rc = -EINVAL;
1574 goto free_lmm;
1575 }
1576
1577 rc = obd_unpackmd(sbi->ll_dt_exp, &lsm, lmm, lmmsize);
1578 if (rc < 0) {
1579 rc = -ENOMEM;
1580 goto free_lmm;
1581 }
1582
1583 /* Perform glimpse_size operation. */
1584 memset(&st, 0, sizeof(st));
1585
1586 rc = ll_glimpse_ioctl(sbi, lsm, &st);
1587 if (rc)
1588 goto free_lsm;
1589
1590 if (copy_to_user(&lumd->lmd_st, &st, sizeof(st))) {
1591 rc = -EFAULT;
1592 goto free_lsm;
1593 }
1594
1595 free_lsm:
1596 obd_free_memmd(sbi->ll_dt_exp, &lsm);
1597 free_lmm:
1598 kvfree(lmm);
1599 return rc;
1600 }
1601 case OBD_IOC_LLOG_CATINFO: {
1602 return -EOPNOTSUPP;
1603 }
1604 case OBD_IOC_QUOTACHECK: {
1605 struct obd_quotactl *oqctl;
1606 int error = 0;
1607
1608 if (!capable(CFS_CAP_SYS_ADMIN) ||
1609 sbi->ll_flags & LL_SBI_RMT_CLIENT)
1610 return -EPERM;
1611
1612 oqctl = kzalloc(sizeof(*oqctl), GFP_NOFS);
1613 if (!oqctl)
1614 return -ENOMEM;
1615 oqctl->qc_type = arg;
1616 rc = obd_quotacheck(sbi->ll_md_exp, oqctl);
1617 if (rc < 0) {
1618 CDEBUG(D_INFO, "md_quotacheck failed: rc %d\n", rc);
1619 error = rc;
1620 }
1621
1622 rc = obd_quotacheck(sbi->ll_dt_exp, oqctl);
1623 if (rc < 0)
1624 CDEBUG(D_INFO, "obd_quotacheck failed: rc %d\n", rc);
1625
1626 kfree(oqctl);
1627 return error ?: rc;
1628 }
1629 case OBD_IOC_POLL_QUOTACHECK: {
1630 struct if_quotacheck *check;
1631
1632 if (!capable(CFS_CAP_SYS_ADMIN) ||
1633 sbi->ll_flags & LL_SBI_RMT_CLIENT)
1634 return -EPERM;
1635
1636 check = kzalloc(sizeof(*check), GFP_NOFS);
1637 if (!check)
1638 return -ENOMEM;
1639
1640 rc = obd_iocontrol(cmd, sbi->ll_md_exp, 0, (void *)check,
1641 NULL);
1642 if (rc) {
1643 CDEBUG(D_QUOTA, "mdc ioctl %d failed: %d\n", cmd, rc);
1644 if (copy_to_user((void *)arg, check,
1645 sizeof(*check)))
1646 CDEBUG(D_QUOTA, "copy_to_user failed\n");
1647 goto out_poll;
1648 }
1649
1650 rc = obd_iocontrol(cmd, sbi->ll_dt_exp, 0, (void *)check,
1651 NULL);
1652 if (rc) {
1653 CDEBUG(D_QUOTA, "osc ioctl %d failed: %d\n", cmd, rc);
1654 if (copy_to_user((void *)arg, check,
1655 sizeof(*check)))
1656 CDEBUG(D_QUOTA, "copy_to_user failed\n");
1657 goto out_poll;
1658 }
1659 out_poll:
1660 kfree(check);
1661 return rc;
1662 }
1663 case LL_IOC_QUOTACTL: {
1664 struct if_quotactl *qctl;
1665
1666 qctl = kzalloc(sizeof(*qctl), GFP_NOFS);
1667 if (!qctl)
1668 return -ENOMEM;
1669
1670 if (copy_from_user(qctl, (void *)arg, sizeof(*qctl))) {
1671 rc = -EFAULT;
1672 goto out_quotactl;
1673 }
1674
1675 rc = quotactl_ioctl(sbi, qctl);
1676
1677 if (rc == 0 && copy_to_user((void *)arg, qctl, sizeof(*qctl)))
1678 rc = -EFAULT;
1679
1680 out_quotactl:
1681 kfree(qctl);
1682 return rc;
1683 }
1684 case OBD_IOC_GETDTNAME:
1685 case OBD_IOC_GETMDNAME:
1686 return ll_get_obd_name(inode, cmd, arg);
1687 case LL_IOC_FLUSHCTX:
1688 return ll_flush_ctx(inode);
1689 #ifdef CONFIG_FS_POSIX_ACL
1690 case LL_IOC_RMTACL: {
1691 if (sbi->ll_flags & LL_SBI_RMT_CLIENT && is_root_inode(inode)) {
1692 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1693
1694 LASSERT(fd != NULL);
1695 rc = rct_add(&sbi->ll_rct, current_pid(), arg);
1696 if (!rc)
1697 fd->fd_flags |= LL_FILE_RMTACL;
1698 return rc;
1699 } else
1700 return 0;
1701 }
1702 #endif
1703 case LL_IOC_GETOBDCOUNT: {
1704 int count, vallen;
1705 struct obd_export *exp;
1706
1707 if (copy_from_user(&count, (int *)arg, sizeof(int)))
1708 return -EFAULT;
1709
1710 /* get ost count when count is zero, get mdt count otherwise */
1711 exp = count ? sbi->ll_md_exp : sbi->ll_dt_exp;
1712 vallen = sizeof(count);
1713 rc = obd_get_info(NULL, exp, sizeof(KEY_TGT_COUNT),
1714 KEY_TGT_COUNT, &vallen, &count, NULL);
1715 if (rc) {
1716 CERROR("get target count failed: %d\n", rc);
1717 return rc;
1718 }
1719
1720 if (copy_to_user((int *)arg, &count, sizeof(int)))
1721 return -EFAULT;
1722
1723 return 0;
1724 }
1725 case LL_IOC_PATH2FID:
1726 if (copy_to_user((void *)arg, ll_inode2fid(inode),
1727 sizeof(struct lu_fid)))
1728 return -EFAULT;
1729 return 0;
1730 case LL_IOC_GET_CONNECT_FLAGS: {
1731 return obd_iocontrol(cmd, sbi->ll_md_exp, 0, NULL, (void *)arg);
1732 }
1733 case OBD_IOC_CHANGELOG_SEND:
1734 case OBD_IOC_CHANGELOG_CLEAR:
1735 if (!capable(CFS_CAP_SYS_ADMIN))
1736 return -EPERM;
1737
1738 rc = copy_and_ioctl(cmd, sbi->ll_md_exp, (void *)arg,
1739 sizeof(struct ioc_changelog));
1740 return rc;
1741 case OBD_IOC_FID2PATH:
1742 return ll_fid2path(inode, (void *)arg);
1743 case LL_IOC_HSM_REQUEST: {
1744 struct hsm_user_request *hur;
1745 ssize_t totalsize;
1746
1747 hur = memdup_user((void *)arg, sizeof(*hur));
1748 if (IS_ERR(hur))
1749 return PTR_ERR(hur);
1750
1751 /* Compute the whole struct size */
1752 totalsize = hur_len(hur);
1753 kfree(hur);
1754 if (totalsize < 0)
1755 return -E2BIG;
1756
1757 /* Final size will be more than double totalsize */
1758 if (totalsize >= MDS_MAXREQSIZE / 3)
1759 return -E2BIG;
1760
1761 hur = libcfs_kvzalloc(totalsize, GFP_NOFS);
1762 if (hur == NULL)
1763 return -ENOMEM;
1764
1765 /* Copy the whole struct */
1766 if (copy_from_user(hur, (void *)arg, totalsize)) {
1767 kvfree(hur);
1768 return -EFAULT;
1769 }
1770
1771 if (hur->hur_request.hr_action == HUA_RELEASE) {
1772 const struct lu_fid *fid;
1773 struct inode *f;
1774 int i;
1775
1776 for (i = 0; i < hur->hur_request.hr_itemcount; i++) {
1777 fid = &hur->hur_user_item[i].hui_fid;
1778 f = search_inode_for_lustre(inode->i_sb, fid);
1779 if (IS_ERR(f)) {
1780 rc = PTR_ERR(f);
1781 break;
1782 }
1783
1784 rc = ll_hsm_release(f);
1785 iput(f);
1786 if (rc != 0)
1787 break;
1788 }
1789 } else {
1790 rc = obd_iocontrol(cmd, ll_i2mdexp(inode), totalsize,
1791 hur, NULL);
1792 }
1793
1794 kvfree(hur);
1795
1796 return rc;
1797 }
1798 case LL_IOC_HSM_PROGRESS: {
1799 struct hsm_progress_kernel hpk;
1800 struct hsm_progress hp;
1801
1802 if (copy_from_user(&hp, (void *)arg, sizeof(hp)))
1803 return -EFAULT;
1804
1805 hpk.hpk_fid = hp.hp_fid;
1806 hpk.hpk_cookie = hp.hp_cookie;
1807 hpk.hpk_extent = hp.hp_extent;
1808 hpk.hpk_flags = hp.hp_flags;
1809 hpk.hpk_errval = hp.hp_errval;
1810 hpk.hpk_data_version = 0;
1811
1812 /* File may not exist in Lustre; all progress
1813 * reported to Lustre root */
1814 rc = obd_iocontrol(cmd, sbi->ll_md_exp, sizeof(hpk), &hpk,
1815 NULL);
1816 return rc;
1817 }
1818 case LL_IOC_HSM_CT_START:
1819 rc = copy_and_ioctl(cmd, sbi->ll_md_exp, (void *)arg,
1820 sizeof(struct lustre_kernelcomm));
1821 return rc;
1822
1823 case LL_IOC_HSM_COPY_START: {
1824 struct hsm_copy *copy;
1825 int rc;
1826
1827 copy = memdup_user((char *)arg, sizeof(*copy));
1828 if (IS_ERR(copy))
1829 return PTR_ERR(copy);
1830
1831 rc = ll_ioc_copy_start(inode->i_sb, copy);
1832 if (copy_to_user((char *)arg, copy, sizeof(*copy)))
1833 rc = -EFAULT;
1834
1835 kfree(copy);
1836 return rc;
1837 }
1838 case LL_IOC_HSM_COPY_END: {
1839 struct hsm_copy *copy;
1840 int rc;
1841
1842 copy = memdup_user((char *)arg, sizeof(*copy));
1843 if (IS_ERR(copy))
1844 return PTR_ERR(copy);
1845
1846 rc = ll_ioc_copy_end(inode->i_sb, copy);
1847 if (copy_to_user((char *)arg, copy, sizeof(*copy)))
1848 rc = -EFAULT;
1849
1850 kfree(copy);
1851 return rc;
1852 }
1853 default:
1854 return obd_iocontrol(cmd, sbi->ll_dt_exp, 0, NULL, (void *)arg);
1855 }
1856 }
1857
ll_dir_seek(struct file * file,loff_t offset,int origin)1858 static loff_t ll_dir_seek(struct file *file, loff_t offset, int origin)
1859 {
1860 struct inode *inode = file->f_mapping->host;
1861 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1862 struct ll_sb_info *sbi = ll_i2sbi(inode);
1863 int api32 = ll_need_32bit_api(sbi);
1864 loff_t ret = -EINVAL;
1865
1866 mutex_lock(&inode->i_mutex);
1867 switch (origin) {
1868 case SEEK_SET:
1869 break;
1870 case SEEK_CUR:
1871 offset += file->f_pos;
1872 break;
1873 case SEEK_END:
1874 if (offset > 0)
1875 goto out;
1876 if (api32)
1877 offset += LL_DIR_END_OFF_32BIT;
1878 else
1879 offset += LL_DIR_END_OFF;
1880 break;
1881 default:
1882 goto out;
1883 }
1884
1885 if (offset >= 0 &&
1886 ((api32 && offset <= LL_DIR_END_OFF_32BIT) ||
1887 (!api32 && offset <= LL_DIR_END_OFF))) {
1888 if (offset != file->f_pos) {
1889 if ((api32 && offset == LL_DIR_END_OFF_32BIT) ||
1890 (!api32 && offset == LL_DIR_END_OFF))
1891 fd->lfd_pos = MDS_DIR_END_OFF;
1892 else if (api32 && sbi->ll_flags & LL_SBI_64BIT_HASH)
1893 fd->lfd_pos = offset << 32;
1894 else
1895 fd->lfd_pos = offset;
1896 file->f_pos = offset;
1897 file->f_version = 0;
1898 }
1899 ret = offset;
1900 }
1901 goto out;
1902
1903 out:
1904 mutex_unlock(&inode->i_mutex);
1905 return ret;
1906 }
1907
ll_dir_open(struct inode * inode,struct file * file)1908 static int ll_dir_open(struct inode *inode, struct file *file)
1909 {
1910 return ll_file_open(inode, file);
1911 }
1912
ll_dir_release(struct inode * inode,struct file * file)1913 static int ll_dir_release(struct inode *inode, struct file *file)
1914 {
1915 return ll_file_release(inode, file);
1916 }
1917
1918 const struct file_operations ll_dir_operations = {
1919 .llseek = ll_dir_seek,
1920 .open = ll_dir_open,
1921 .release = ll_dir_release,
1922 .read = generic_read_dir,
1923 .iterate = ll_readdir,
1924 .unlocked_ioctl = ll_dir_ioctl,
1925 .fsync = ll_fsync,
1926 };
1927