4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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.
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).
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
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
27 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2012, Whamcloud, Inc.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
38 * Directory code for lustre client.
42 #include <linux/pagemap.h>
44 #include <linux/version.h>
45 #include <linux/smp_lock.h>
46 #include <asm/uaccess.h>
47 #include <linux/buffer_head.h> // for wait_on_buffer
48 #include <linux/pagevec.h>
50 #define DEBUG_SUBSYSTEM S_LLITE
52 #include <obd_support.h>
53 #include <obd_class.h>
54 #include <lustre_lib.h>
55 #include <lustre/lustre_idl.h>
56 #include <lustre_lite.h>
57 #include <lustre_dlm.h>
58 #include <lustre_fid.h>
59 #include "llite_internal.h"
61 #ifndef HAVE_PAGE_CHECKED
62 #ifdef HAVE_PG_FS_MISC
63 #define PageChecked(page) test_bit(PG_fs_misc, &(page)->flags)
64 #define SetPageChecked(page) set_bit(PG_fs_misc, &(page)->flags)
66 #error PageChecked or PageFsMisc not defined in kernel
71 * (new) readdir implementation overview.
73 * Original lustre readdir implementation cached exact copy of raw directory
74 * pages on the client. These pages were indexed in client page cache by
75 * logical offset in the directory file. This design, while very simple and
76 * intuitive had some inherent problems:
78 * . it implies that byte offset to the directory entry serves as a
79 * telldir(3)/seekdir(3) cookie, but that offset is not stable: in
80 * ext3/htree directory entries may move due to splits, and more
83 * . it is incompatible with the design of split directories for cmd3,
84 * that assumes that names are distributed across nodes based on their
85 * hash, and so readdir should be done in hash order.
87 * New readdir implementation does readdir in hash order, and uses hash of a
88 * file name as a telldir/seekdir cookie. This led to number of complications:
90 * . hash is not unique, so it cannot be used to index cached directory
91 * pages on the client (note, that it requires a whole pageful of hash
92 * collided entries to cause two pages to have identical hashes);
94 * . hash is not unique, so it cannot, strictly speaking, be used as an
95 * entry cookie. ext3/htree has the same problem and lustre implementation
96 * mimics their solution: seekdir(hash) positions directory at the first
97 * entry with the given hash.
103 * Client caches directory pages using hash of the first entry as an index. As
104 * noted above hash is not unique, so this solution doesn't work as is:
105 * special processing is needed for "page hash chains" (i.e., sequences of
106 * pages filled with entries all having the same hash value).
108 * First, such chains have to be detected. To this end, server returns to the
109 * client the hash of the first entry on the page next to one returned. When
110 * client detects that this hash is the same as hash of the first entry on the
111 * returned page, page hash collision has to be handled. Pages in the
112 * hash chain, except first one, are termed "overflow pages".
114 * Solution to index uniqueness problem is to not cache overflow
115 * pages. Instead, when page hash collision is detected, all overflow pages
116 * from emerging chain are immediately requested from the server and placed in
117 * a special data structure (struct ll_dir_chain). This data structure is used
118 * by ll_readdir() to process entries from overflow pages. When readdir
119 * invocation finishes, overflow pages are discarded. If page hash collision
120 * chain weren't completely processed, next call to readdir will again detect
121 * page hash collision, again read overflow pages in, process next portion of
122 * entries and again discard the pages. This is not as wasteful as it looks,
123 * because, given reasonable hash, page hash collisions are extremely rare.
125 * 1. directory positioning
127 * When seekdir(hash) is called, original
138 * identification of and access to overflow pages
142 * Page in MDS_READPAGE RPC is packed in LU_PAGE_SIZE, and each page contains
143 * a header lu_dirpage which describes the start/end hash, and whether this
144 * page is empty (contains no dir entry) or hash collide with next page.
145 * After client receives reply, several pages will be integrated into dir page
146 * in CFS_PAGE_SIZE (if CFS_PAGE_SIZE greater than LU_PAGE_SIZE), and the
147 * lu_dirpage for this integrated page will be adjusted.
151 /* returns the page unlocked, but with a reference */
152 static int ll_dir_readpage(struct file *file, struct page *page0)
154 struct inode *inode = page0->mapping->host;
155 int hash64 = ll_i2sbi(inode)->ll_flags & LL_SBI_64BIT_HASH;
156 struct obd_export *exp = ll_i2sbi(inode)->ll_md_exp;
157 struct ptlrpc_request *request;
158 struct mdt_body *body;
159 struct md_op_data *op_data;
161 struct page **page_pool;
163 #ifndef HAVE_ADD_TO_PAGE_CACHE_LRU
164 struct pagevec lru_pvec;
166 struct lu_dirpage *dp;
167 int max_pages = ll_i2sbi(inode)->ll_md_brw_size >> CFS_PAGE_SHIFT;
168 int nrdpgs = 0; /* number of pages read actually */
175 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
177 hash = fd->fd_dir.lfd_next;
179 hash = ll_i2info(inode)->lli_sa_pos;
181 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p) hash "LPU64"\n",
182 inode->i_ino, inode->i_generation, inode, hash);
184 LASSERT(max_pages > 0 && max_pages <= PTLRPC_MAX_BRW_PAGES);
186 OBD_ALLOC(page_pool, sizeof(page) * max_pages);
187 if (page_pool != NULL) {
188 page_pool[0] = page0;
193 for (npages = 1; npages < max_pages; npages++) {
194 page = page_cache_alloc_cold(inode->i_mapping);
197 page_pool[npages] = page;
200 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
201 LUSTRE_OPC_ANY, NULL);
202 op_data->op_npages = npages;
203 op_data->op_offset = hash;
204 rc = md_readpage(exp, op_data, page_pool, &request);
205 ll_finish_md_op_data(op_data);
207 body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
208 /* Checked by mdc_readpage() */
209 LASSERT(body != NULL);
211 if (body->valid & OBD_MD_FLSIZE)
212 cl_isize_write(inode, body->size);
214 nrdpgs = (request->rq_bulk->bd_nob_transferred+CFS_PAGE_SIZE-1)
216 SetPageUptodate(page0);
219 ptlrpc_req_finished(request);
221 CDEBUG(D_VFSTRACE, "read %d/%d pages\n", nrdpgs, npages);
223 ll_pagevec_init(&lru_pvec, 0);
224 for (i = 1; i < npages; i++) {
225 unsigned long offset;
230 if (rc < 0 || i >= nrdpgs) {
231 page_cache_release(page);
235 SetPageUptodate(page);
238 hash = le64_to_cpu(dp->ldp_hash_start);
241 offset = hash_x_index(hash, hash64);
243 prefetchw(&page->flags);
244 ret = ll_add_to_page_cache_lru(page, inode->i_mapping, offset,
248 page_cache_get(page);
249 if (ll_pagevec_add(&lru_pvec, page) == 0)
250 ll_pagevec_lru_add_file(&lru_pvec);
252 CDEBUG(D_VFSTRACE, "page %lu add to page cache failed:"
253 " %d\n", offset, ret);
255 page_cache_release(page);
257 ll_pagevec_lru_add_file(&lru_pvec);
259 if (page_pool != &page0)
260 OBD_FREE(page_pool, sizeof(struct page *) * max_pages);
265 #ifndef MS_HAS_NEW_AOPS
266 struct address_space_operations ll_dir_aops = {
267 .readpage = ll_dir_readpage,
270 struct address_space_operations_ext ll_dir_aops = {
271 .orig_aops.readpage = ll_dir_readpage,
275 static void ll_check_page(struct inode *dir, struct page *page)
277 /* XXX: check page format later */
278 SetPageChecked(page);
281 void ll_release_page(struct page *page, int remove)
286 if (likely(page->mapping != NULL))
287 truncate_complete_page(page->mapping, page);
290 page_cache_release(page);
294 * Find, kmap and return page that contains given hash.
296 static struct page *ll_dir_page_locate(struct inode *dir, __u64 *hash,
297 __u64 *start, __u64 *end)
299 int hash64 = ll_i2sbi(dir)->ll_flags & LL_SBI_64BIT_HASH;
300 struct address_space *mapping = dir->i_mapping;
302 * Complement of hash is used as an index so that
303 * radix_tree_gang_lookup() can be used to find a page with starting
304 * hash _smaller_ than one we are looking for.
306 unsigned long offset = hash_x_index(*hash, hash64);
310 TREE_READ_LOCK_IRQ(mapping);
311 found = radix_tree_gang_lookup(&mapping->page_tree,
312 (void **)&page, offset, 1);
314 struct lu_dirpage *dp;
316 page_cache_get(page);
317 TREE_READ_UNLOCK_IRQ(mapping);
319 * In contrast to find_lock_page() we are sure that directory
320 * page cannot be truncated (while DLM lock is held) and,
321 * hence, can avoid restart.
323 * In fact, page cannot be locked here at all, because
324 * ll_dir_readpage() does synchronous io.
327 if (PageUptodate(page)) {
329 if (BITS_PER_LONG == 32 && hash64) {
330 *start = le64_to_cpu(dp->ldp_hash_start) >> 32;
331 *end = le64_to_cpu(dp->ldp_hash_end) >> 32;
334 *start = le64_to_cpu(dp->ldp_hash_start);
335 *end = le64_to_cpu(dp->ldp_hash_end);
337 LASSERTF(*start <= *hash, "start = "LPX64",end = "
338 LPX64",hash = "LPX64"\n", *start, *end, *hash);
339 CDEBUG(D_VFSTRACE, "page %lu [%llu %llu], hash "LPU64"\n",
340 offset, *start, *end, *hash);
342 ll_release_page(page, 0);
344 } else if (*end != *start && *hash == *end) {
346 * upon hash collision, remove this page,
347 * otherwise put page reference, and
348 * ll_get_dir_page() will issue RPC to fetch
351 ll_release_page(page,
352 le32_to_cpu(dp->ldp_flags) & LDF_COLLIDE);
356 page_cache_release(page);
357 page = ERR_PTR(-EIO);
361 TREE_READ_UNLOCK_IRQ(mapping);
367 struct page *ll_get_dir_page(struct file *filp, struct inode *dir, __u64 hash,
368 struct ll_dir_chain *chain)
370 ldlm_policy_data_t policy = {.l_inodebits = {MDS_INODELOCK_UPDATE} };
371 struct address_space *mapping = dir->i_mapping;
372 struct lustre_handle lockh;
373 struct lu_dirpage *dp;
380 struct ll_inode_info *lli = ll_i2info(dir);
381 int hash64 = ll_i2sbi(dir)->ll_flags & LL_SBI_64BIT_HASH;
384 rc = md_lock_match(ll_i2sbi(dir)->ll_md_exp, LDLM_FL_BLOCK_GRANTED,
385 ll_inode2fid(dir), LDLM_IBITS, &policy, mode, &lockh);
387 struct ldlm_enqueue_info einfo = { LDLM_IBITS, mode,
388 ll_md_blocking_ast, ldlm_completion_ast,
390 struct lookup_intent it = { .it_op = IT_READDIR };
391 struct ptlrpc_request *request;
392 struct md_op_data *op_data;
394 op_data = ll_prep_md_op_data(NULL, dir, NULL, NULL, 0, 0,
395 LUSTRE_OPC_ANY, NULL);
397 return (void *)op_data;
399 rc = md_enqueue(ll_i2sbi(dir)->ll_md_exp, &einfo, &it,
400 op_data, &lockh, NULL, 0, NULL, 0);
402 ll_finish_md_op_data(op_data);
404 request = (struct ptlrpc_request *)it.d.lustre.it_data;
406 ptlrpc_req_finished(request);
408 CERROR("lock enqueue: "DFID" at "LPU64": rc %d\n",
409 PFID(ll_inode2fid(dir)), hash, rc);
413 /* for cross-ref object, l_ast_data of the lock may not be set,
414 * we reset it here */
415 md_set_lock_data(ll_i2sbi(dir)->ll_md_exp, &lockh.cookie,
418 ldlm_lock_dump_handle(D_OTHER, &lockh);
420 cfs_mutex_lock(&lli->lli_readdir_mutex);
421 page = ll_dir_page_locate(dir, &lhash, &start, &end);
423 CERROR("dir page locate: "DFID" at "LPU64": rc %ld\n",
424 PFID(ll_inode2fid(dir)), lhash, PTR_ERR(page));
425 GOTO(out_unlock, page);
426 } else if (page != NULL) {
428 * XXX nikita: not entirely correct handling of a corner case:
429 * suppose hash chain of entries with hash value HASH crosses
430 * border between pages P0 and P1. First both P0 and P1 are
431 * cached, seekdir() is called for some entry from the P0 part
432 * of the chain. Later P0 goes out of cache. telldir(HASH)
433 * happens and finds P1, as it starts with matching hash
434 * value. Remaining entries from P0 part of the chain are
435 * skipped. (Is that really a bug?)
437 * Possible solutions: 0. don't cache P1 is such case, handle
438 * it as an "overflow" page. 1. invalidate all pages at
439 * once. 2. use HASH|1 as an index for P1.
441 GOTO(hash_collision, page);
444 page = read_cache_page(mapping, hash_x_index(hash, hash64),
445 (filler_t*)mapping->a_ops->readpage, filp);
447 CERROR("read cache page: "DFID" at "LPU64": rc %ld\n",
448 PFID(ll_inode2fid(dir)), hash, PTR_ERR(page));
449 GOTO(out_unlock, page);
454 if (!PageUptodate(page)) {
455 CERROR("page not updated: "DFID" at "LPU64": rc %d\n",
456 PFID(ll_inode2fid(dir)), hash, -5);
459 if (!PageChecked(page))
460 ll_check_page(dir, page);
461 if (PageError(page)) {
462 CERROR("page error: "DFID" at "LPU64": rc %d\n",
463 PFID(ll_inode2fid(dir)), hash, -5);
467 dp = page_address(page);
468 if (BITS_PER_LONG == 32 && hash64) {
469 start = le64_to_cpu(dp->ldp_hash_start) >> 32;
470 end = le64_to_cpu(dp->ldp_hash_end) >> 32;
473 start = le64_to_cpu(dp->ldp_hash_start);
474 end = le64_to_cpu(dp->ldp_hash_end);
478 LASSERT(start == lhash);
479 CWARN("Page-wide hash collision: "LPU64"\n", end);
480 if (BITS_PER_LONG == 32 && hash64)
481 CWARN("Real page-wide hash collision at ["LPU64" "LPU64
482 "] with hash "LPU64"\n",
483 le64_to_cpu(dp->ldp_hash_start),
484 le64_to_cpu(dp->ldp_hash_end), hash);
486 * Fetch whole overflow chain...
493 cfs_mutex_unlock(&lli->lli_readdir_mutex);
494 ldlm_lock_decref(&lockh, mode);
498 ll_release_page(page, 1);
499 page = ERR_PTR(-EIO);
503 int ll_readdir(struct file *filp, void *cookie, filldir_t filldir)
505 struct inode *inode = filp->f_dentry->d_inode;
506 struct ll_inode_info *info = ll_i2info(inode);
507 struct ll_sb_info *sbi = ll_i2sbi(inode);
508 struct ll_file_data *fd = LUSTRE_FPRIVATE(filp);
509 __u64 pos = fd->fd_dir.lfd_pos;
510 int api32 = ll_need_32bit_api(sbi);
511 int hash64 = sbi->ll_flags & LL_SBI_64BIT_HASH;
513 struct ll_dir_chain chain;
518 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p) pos %lu/%llu 32bit_api %d\n",
519 inode->i_ino, inode->i_generation, inode,
520 (unsigned long)pos, i_size_read(inode), api32);
522 if (pos == MDS_DIR_END_OFF)
530 ll_dir_chain_init(&chain);
532 fd->fd_dir.lfd_next = pos;
533 page = ll_get_dir_page(filp, inode, pos, &chain);
535 while (rc == 0 && !done) {
536 struct lu_dirpage *dp;
537 struct lu_dirent *ent;
541 * If page is empty (end of directory is reached),
544 __u64 hash = MDS_DIR_END_OFF;
547 dp = page_address(page);
548 for (ent = lu_dirent_start(dp); ent != NULL && !done;
549 ent = lu_dirent_next(ent)) {
557 * XXX: implement correct swabbing here.
560 hash = le64_to_cpu(ent->lde_hash);
563 * Skip until we find target hash
568 namelen = le16_to_cpu(ent->lde_namelen);
579 fid_le_to_cpu(&fid, &ent->lde_fid);
580 ino = cl_fid_build_ino(&fid, api32);
581 type = ll_dirent_type_get(ent);
582 /* For 'll_nfs_get_name_filldir()', it will try
583 * to access the 'ent' through its 'lde_name',
584 * so the parameter 'name' for 'filldir()' must
585 * be part of the 'ent'. */
586 done = filldir(cookie, ent->lde_name, namelen,
589 next = le64_to_cpu(dp->ldp_hash_end);
592 if (pos == MDS_DIR_END_OFF) {
594 * End of directory reached.
597 ll_release_page(page, 0);
598 } else if (1 /* chain is exhausted*/) {
600 * Normal case: continue to the next
603 ll_release_page(page,
604 le32_to_cpu(dp->ldp_flags) &
606 fd->fd_dir.lfd_next = pos;
607 page = ll_get_dir_page(filp, inode, pos,
611 * go into overflow page.
613 LASSERT(le32_to_cpu(dp->ldp_flags) &
615 ll_release_page(page, 1);
619 ll_release_page(page, 0);
623 CERROR("error reading dir "DFID" at %lu: rc %d\n",
624 PFID(&info->lli_fid), (unsigned long)pos, rc);
628 fd->fd_dir.lfd_pos = pos;
629 if (pos == MDS_DIR_END_OFF) {
631 filp->f_pos = LL_DIR_END_OFF_32BIT;
633 filp->f_pos = LL_DIR_END_OFF;
636 filp->f_pos = pos >> 32;
640 filp->f_version = inode->i_version;
641 touch_atime(filp->f_vfsmnt, filp->f_dentry);
643 ll_dir_chain_fini(&chain);
647 ll_stats_ops_tally(sbi, LPROC_LL_READDIR, 1);
652 int ll_send_mgc_param(struct obd_export *mgc, char *string)
654 struct mgs_send_param *msp;
661 strncpy(msp->mgs_param, string, MGS_PARAM_MAXLEN);
662 rc = obd_set_info_async(mgc, sizeof(KEY_SET_INFO), KEY_SET_INFO,
663 sizeof(struct mgs_send_param), msp, NULL);
665 CERROR("Failed to set parameter: %d\n", rc);
671 char *ll_get_fsname(struct inode *inode)
673 struct lustre_sb_info *lsi = s2lsi(inode->i_sb);
677 OBD_ALLOC(fsname, MGS_PARAM_MAXLEN);
678 len = strlen(lsi->lsi_lmd->lmd_profile);
679 ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
680 if (ptr && (strcmp(ptr, "-client") == 0))
682 strncpy(fsname, lsi->lsi_lmd->lmd_profile, len);
688 int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
691 struct ll_sb_info *sbi = ll_i2sbi(inode);
692 struct md_op_data *op_data;
693 struct ptlrpc_request *req = NULL;
695 struct lustre_sb_info *lsi = s2lsi(inode->i_sb);
696 struct obd_device *mgc = lsi->lsi_mgc;
697 char *fsname = NULL, *param = NULL;
702 * This is coming from userspace, so should be in
703 * local endian. But the MDS would like it in little
704 * endian, so we swab it before we send it.
706 switch (lump->lmm_magic) {
707 case LOV_USER_MAGIC_V1: {
708 if (lump->lmm_magic != cpu_to_le32(LOV_USER_MAGIC_V1))
709 lustre_swab_lov_user_md_v1(lump);
710 lum_size = sizeof(struct lov_user_md_v1);
713 case LOV_USER_MAGIC_V3: {
714 if (lump->lmm_magic != cpu_to_le32(LOV_USER_MAGIC_V3))
715 lustre_swab_lov_user_md_v3(
716 (struct lov_user_md_v3 *)lump);
717 lum_size = sizeof(struct lov_user_md_v3);
721 CDEBUG(D_IOCTL, "bad userland LOV MAGIC:"
722 " %#08x != %#08x nor %#08x\n",
723 lump->lmm_magic, LOV_USER_MAGIC_V1,
729 lum_size = sizeof(struct lov_user_md_v1);
732 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
733 LUSTRE_OPC_ANY, NULL);
735 RETURN(PTR_ERR(op_data));
737 /* swabbing is done in lov_setstripe() on server side */
738 rc = md_setattr(sbi->ll_md_exp, op_data, lump, lum_size,
739 NULL, 0, &req, NULL);
740 ll_finish_md_op_data(op_data);
741 ptlrpc_req_finished(req);
743 if (rc != -EPERM && rc != -EACCES)
744 CERROR("mdc_setattr fails: rc = %d\n", rc);
747 /* In the following we use the fact that LOV_USER_MAGIC_V1 and
748 LOV_USER_MAGIC_V3 have the same initial fields so we do not
749 need the make the distiction between the 2 versions */
750 if (set_default && mgc->u.cli.cl_mgc_mgsexp) {
751 OBD_ALLOC(param, MGS_PARAM_MAXLEN);
753 /* Get fsname and assume devname to be -MDT0000. */
754 fsname = ll_get_fsname(inode);
755 /* Set root stripesize */
756 sprintf(param, "%s-MDT0000.lov.stripesize=%u", fsname,
757 lump ? le32_to_cpu(lump->lmm_stripe_size) : 0);
758 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
762 /* Set root stripecount */
763 sprintf(param, "%s-MDT0000.lov.stripecount=%hd", fsname,
764 lump ? le16_to_cpu(lump->lmm_stripe_count) : 0);
765 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
769 /* Set root stripeoffset */
770 sprintf(param, "%s-MDT0000.lov.stripeoffset=%hd", fsname,
771 lump ? le16_to_cpu(lump->lmm_stripe_offset) :
772 (typeof(lump->lmm_stripe_offset))(-1));
773 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
778 OBD_FREE(fsname, MGS_PARAM_MAXLEN);
780 OBD_FREE(param, MGS_PARAM_MAXLEN);
785 int ll_dir_getstripe(struct inode *inode, struct lov_mds_md **lmmp,
786 int *lmm_size, struct ptlrpc_request **request)
788 struct ll_sb_info *sbi = ll_i2sbi(inode);
789 struct mdt_body *body;
790 struct lov_mds_md *lmm = NULL;
791 struct ptlrpc_request *req = NULL;
793 struct md_op_data *op_data;
795 rc = ll_get_max_mdsize(sbi, &lmmsize);
799 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
800 0, lmmsize, LUSTRE_OPC_ANY,
803 RETURN(PTR_ERR(op_data));
805 op_data->op_valid = OBD_MD_FLEASIZE | OBD_MD_FLDIREA;
806 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
807 ll_finish_md_op_data(op_data);
809 CDEBUG(D_INFO, "md_getattr failed on inode "
810 "%lu/%u: rc %d\n", inode->i_ino,
811 inode->i_generation, rc);
815 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
816 LASSERT(body != NULL);
818 lmmsize = body->eadatasize;
820 if (!(body->valid & (OBD_MD_FLEASIZE | OBD_MD_FLDIREA)) ||
822 GOTO(out, rc = -ENODATA);
825 lmm = req_capsule_server_sized_get(&req->rq_pill,
826 &RMF_MDT_MD, lmmsize);
827 LASSERT(lmm != NULL);
830 * This is coming from the MDS, so is probably in
831 * little endian. We convert it to host endian before
832 * passing it to userspace.
834 /* We don't swab objects for directories */
835 switch (le32_to_cpu(lmm->lmm_magic)) {
837 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
838 lustre_swab_lov_user_md_v1((struct lov_user_md_v1 *)lmm);
841 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
842 lustre_swab_lov_user_md_v3((struct lov_user_md_v3 *)lmm);
845 CERROR("unknown magic: %lX\n", (unsigned long)lmm->lmm_magic);
856 * Get MDT index for the inode.
858 int ll_get_mdt_idx(struct inode *inode)
860 struct ll_sb_info *sbi = ll_i2sbi(inode);
861 struct md_op_data *op_data;
865 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0,
866 0, LUSTRE_OPC_ANY, NULL);
868 RETURN(PTR_ERR(op_data));
870 op_data->op_valid |= OBD_MD_MDTIDX;
871 rc = md_getattr(sbi->ll_md_exp, op_data, NULL);
872 mdtidx = op_data->op_mds;
873 ll_finish_md_op_data(op_data);
875 CDEBUG(D_INFO, "md_getattr_name: %d\n", rc);
881 static int copy_and_ioctl(int cmd, struct obd_export *exp, void *data, int len)
889 if (cfs_copy_from_user(ptr, data, len)) {
893 rc = obd_iocontrol(cmd, exp, len, data, NULL);
898 static int quotactl_ioctl(struct ll_sb_info *sbi, struct if_quotactl *qctl)
900 int cmd = qctl->qc_cmd;
901 int type = qctl->qc_type;
902 int id = qctl->qc_id;
903 int valid = qctl->qc_valid;
908 case LUSTRE_Q_INVALIDATE:
909 case LUSTRE_Q_FINVALIDATE:
914 if (!cfs_capable(CFS_CAP_SYS_ADMIN) ||
915 sbi->ll_flags & LL_SBI_RMT_CLIENT)
919 if (((type == USRQUOTA && cfs_curproc_euid() != id) ||
920 (type == GRPQUOTA && !in_egroup_p(id))) &&
921 (!cfs_capable(CFS_CAP_SYS_ADMIN) ||
922 sbi->ll_flags & LL_SBI_RMT_CLIENT))
928 CERROR("unsupported quotactl op: %#x\n", cmd);
932 if (valid != QC_GENERAL) {
933 if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
936 if (cmd == Q_GETINFO)
937 qctl->qc_cmd = Q_GETOINFO;
938 else if (cmd == Q_GETQUOTA)
939 qctl->qc_cmd = Q_GETOQUOTA;
945 rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
946 sizeof(*qctl), qctl, NULL);
949 rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_dt_exp,
950 sizeof(*qctl), qctl, NULL);
953 rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
954 sizeof(*qctl), qctl, NULL);
956 rc = obd_iocontrol(OBD_IOC_QUOTACTL,
958 sizeof(*qctl), qctl, NULL);
970 struct obd_quotactl *oqctl;
972 OBD_ALLOC_PTR(oqctl);
976 QCTL_COPY(oqctl, qctl);
977 rc = obd_quotactl(sbi->ll_md_exp, oqctl);
979 if (rc != -EALREADY && cmd == Q_QUOTAON) {
980 oqctl->qc_cmd = Q_QUOTAOFF;
981 obd_quotactl(sbi->ll_md_exp, oqctl);
986 /* If QIF_SPACE is not set, client should collect the
987 * space usage from OSSs by itself */
988 if (cmd == Q_GETQUOTA &&
989 !(oqctl->qc_dqblk.dqb_valid & QIF_SPACE) &&
990 !oqctl->qc_dqblk.dqb_curspace) {
991 struct obd_quotactl *oqctl_tmp;
993 OBD_ALLOC_PTR(oqctl_tmp);
994 if (oqctl_tmp == NULL)
995 GOTO(out, rc = -ENOMEM);
997 oqctl_tmp->qc_cmd = Q_GETOQUOTA;
998 oqctl_tmp->qc_id = oqctl->qc_id;
999 oqctl_tmp->qc_type = oqctl->qc_type;
1001 /* collect space usage from OSTs */
1002 oqctl_tmp->qc_dqblk.dqb_curspace = 0;
1003 rc = obd_quotactl(sbi->ll_dt_exp, oqctl_tmp);
1004 if (!rc || rc == -EREMOTEIO) {
1005 oqctl->qc_dqblk.dqb_curspace =
1006 oqctl_tmp->qc_dqblk.dqb_curspace;
1007 oqctl->qc_dqblk.dqb_valid |= QIF_SPACE;
1010 /* collect space & inode usage from MDTs */
1011 oqctl_tmp->qc_dqblk.dqb_curspace = 0;
1012 oqctl_tmp->qc_dqblk.dqb_curinodes = 0;
1013 rc = obd_quotactl(sbi->ll_md_exp, oqctl_tmp);
1014 if (!rc || rc == -EREMOTEIO) {
1015 oqctl->qc_dqblk.dqb_curspace +=
1016 oqctl_tmp->qc_dqblk.dqb_curspace;
1017 oqctl->qc_dqblk.dqb_curinodes =
1018 oqctl_tmp->qc_dqblk.dqb_curinodes;
1019 oqctl->qc_dqblk.dqb_valid |= QIF_INODES;
1021 oqctl->qc_dqblk.dqb_valid &= ~QIF_SPACE;
1024 OBD_FREE_PTR(oqctl_tmp);
1027 QCTL_COPY(qctl, oqctl);
1028 OBD_FREE_PTR(oqctl);
1034 #ifdef HAVE_UNLOCKED_IOCTL
1035 static long ll_dir_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1037 static int ll_dir_ioctl(struct inode *unuse, struct file *file,
1038 unsigned int cmd, unsigned long arg)
1041 struct inode *inode = file->f_dentry->d_inode;
1042 struct ll_sb_info *sbi = ll_i2sbi(inode);
1043 struct obd_ioctl_data *data;
1047 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), cmd=%#x\n",
1048 inode->i_ino, inode->i_generation, inode, cmd);
1050 /* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */
1051 if (_IOC_TYPE(cmd) == 'T' || _IOC_TYPE(cmd) == 't') /* tty ioctls */
1054 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_IOCTL, 1);
1056 case FSFILT_IOC_GETFLAGS:
1057 case FSFILT_IOC_SETFLAGS:
1058 RETURN(ll_iocontrol(inode, file, cmd, arg));
1059 case FSFILT_IOC_GETVERSION_OLD:
1060 case FSFILT_IOC_GETVERSION:
1061 RETURN(put_user(inode->i_generation, (int *)arg));
1062 /* We need to special case any other ioctls we want to handle,
1063 * to send them to the MDS/OST as appropriate and to properly
1064 * network encode the arg field.
1065 case FSFILT_IOC_SETVERSION_OLD:
1066 case FSFILT_IOC_SETVERSION:
1068 case LL_IOC_GET_MDTIDX: {
1071 mdtidx = ll_get_mdt_idx(inode);
1075 if (put_user((int)mdtidx, (int*)arg))
1080 case IOC_MDC_LOOKUP: {
1081 struct ptlrpc_request *request = NULL;
1082 int namelen, len = 0;
1085 struct md_op_data *op_data;
1087 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
1092 filename = data->ioc_inlbuf1;
1093 namelen = strlen(filename);
1096 CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
1097 GOTO(out_free, rc = -EINVAL);
1100 op_data = ll_prep_md_op_data(NULL, inode, NULL, filename, namelen,
1101 0, LUSTRE_OPC_ANY, NULL);
1102 if (IS_ERR(op_data))
1103 GOTO(out_free, rc = PTR_ERR(op_data));
1105 op_data->op_valid = OBD_MD_FLID;
1106 rc = md_getattr_name(sbi->ll_md_exp, op_data, &request);
1107 ll_finish_md_op_data(op_data);
1109 CDEBUG(D_INFO, "md_getattr_name: %d\n", rc);
1112 ptlrpc_req_finished(request);
1115 obd_ioctl_freedata(buf, len);
1118 case LL_IOC_LOV_SETSTRIPE: {
1119 struct lov_user_md_v3 lumv3;
1120 struct lov_user_md_v1 *lumv1 = (struct lov_user_md_v1 *)&lumv3;
1121 struct lov_user_md_v1 *lumv1p = (struct lov_user_md_v1 *)arg;
1122 struct lov_user_md_v3 *lumv3p = (struct lov_user_md_v3 *)arg;
1124 int set_default = 0;
1126 LASSERT(sizeof(lumv3) == sizeof(*lumv3p));
1127 LASSERT(sizeof(lumv3.lmm_objects[0]) ==
1128 sizeof(lumv3p->lmm_objects[0]));
1129 /* first try with v1 which is smaller than v3 */
1130 if (cfs_copy_from_user(lumv1, lumv1p, sizeof(*lumv1)))
1133 if (lumv1->lmm_magic == LOV_USER_MAGIC_V3) {
1134 if (cfs_copy_from_user(&lumv3, lumv3p, sizeof(lumv3)))
1138 if (inode->i_sb->s_root == file->f_dentry)
1141 /* in v1 and v3 cases lumv1 points to data */
1142 rc = ll_dir_setstripe(inode, lumv1, set_default);
1146 case LL_IOC_OBD_STATFS:
1147 RETURN(ll_obd_statfs(inode, (void *)arg));
1148 case LL_IOC_LOV_GETSTRIPE:
1149 case LL_IOC_MDC_GETINFO:
1150 case IOC_MDC_GETFILEINFO:
1151 case IOC_MDC_GETFILESTRIPE: {
1152 struct ptlrpc_request *request = NULL;
1153 struct lov_user_md *lump;
1154 struct lov_mds_md *lmm = NULL;
1155 struct mdt_body *body;
1156 char *filename = NULL;
1159 if (cmd == IOC_MDC_GETFILEINFO ||
1160 cmd == IOC_MDC_GETFILESTRIPE) {
1161 filename = getname((const char *)arg);
1162 if (IS_ERR(filename))
1163 RETURN(PTR_ERR(filename));
1165 rc = ll_lov_getstripe_ea_info(inode, filename, &lmm,
1166 &lmmsize, &request);
1168 rc = ll_dir_getstripe(inode, &lmm, &lmmsize, &request);
1172 body = req_capsule_server_get(&request->rq_pill,
1174 LASSERT(body != NULL);
1180 if (rc == -ENODATA && (cmd == IOC_MDC_GETFILEINFO ||
1181 cmd == LL_IOC_MDC_GETINFO))
1182 GOTO(skip_lmm, rc = 0);
1187 if (cmd == IOC_MDC_GETFILESTRIPE ||
1188 cmd == LL_IOC_LOV_GETSTRIPE) {
1189 lump = (struct lov_user_md *)arg;
1191 struct lov_user_mds_data *lmdp;
1192 lmdp = (struct lov_user_mds_data *)arg;
1193 lump = &lmdp->lmd_lmm;
1195 if (cfs_copy_to_user(lump, lmm, lmmsize)) {
1196 if (cfs_copy_to_user(lump, lmm, sizeof(*lump)))
1197 GOTO(out_req, rc = -EFAULT);
1201 if (cmd == IOC_MDC_GETFILEINFO || cmd == LL_IOC_MDC_GETINFO) {
1202 struct lov_user_mds_data *lmdp;
1205 st.st_dev = inode->i_sb->s_dev;
1206 st.st_mode = body->mode;
1207 st.st_nlink = body->nlink;
1208 st.st_uid = body->uid;
1209 st.st_gid = body->gid;
1210 st.st_rdev = body->rdev;
1211 st.st_size = body->size;
1212 st.st_blksize = CFS_PAGE_SIZE;
1213 st.st_blocks = body->blocks;
1214 st.st_atime = body->atime;
1215 st.st_mtime = body->mtime;
1216 st.st_ctime = body->ctime;
1217 st.st_ino = inode->i_ino;
1219 lmdp = (struct lov_user_mds_data *)arg;
1220 if (cfs_copy_to_user(&lmdp->lmd_st, &st, sizeof(st)))
1221 GOTO(out_req, rc = -EFAULT);
1226 ptlrpc_req_finished(request);
1231 case IOC_LOV_GETINFO: {
1232 struct lov_user_mds_data *lumd;
1233 struct lov_stripe_md *lsm;
1234 struct lov_user_md *lum;
1235 struct lov_mds_md *lmm;
1239 lumd = (struct lov_user_mds_data *)arg;
1240 lum = &lumd->lmd_lmm;
1242 rc = ll_get_max_mdsize(sbi, &lmmsize);
1246 OBD_ALLOC_LARGE(lmm, lmmsize);
1247 if (cfs_copy_from_user(lmm, lum, lmmsize))
1248 GOTO(free_lmm, rc = -EFAULT);
1250 switch (lmm->lmm_magic) {
1251 case LOV_USER_MAGIC_V1:
1252 if (LOV_USER_MAGIC_V1 == cpu_to_le32(LOV_USER_MAGIC_V1))
1254 /* swab objects first so that stripes num will be sane */
1255 lustre_swab_lov_user_md_objects(
1256 ((struct lov_user_md_v1 *)lmm)->lmm_objects,
1257 ((struct lov_user_md_v1 *)lmm)->lmm_stripe_count);
1258 lustre_swab_lov_user_md_v1((struct lov_user_md_v1 *)lmm);
1260 case LOV_USER_MAGIC_V3:
1261 if (LOV_USER_MAGIC_V3 == cpu_to_le32(LOV_USER_MAGIC_V3))
1263 /* swab objects first so that stripes num will be sane */
1264 lustre_swab_lov_user_md_objects(
1265 ((struct lov_user_md_v3 *)lmm)->lmm_objects,
1266 ((struct lov_user_md_v3 *)lmm)->lmm_stripe_count);
1267 lustre_swab_lov_user_md_v3((struct lov_user_md_v3 *)lmm);
1270 GOTO(free_lmm, rc = -EINVAL);
1273 rc = obd_unpackmd(sbi->ll_dt_exp, &lsm, lmm, lmmsize);
1275 GOTO(free_lmm, rc = -ENOMEM);
1277 /* Perform glimpse_size operation. */
1278 memset(&st, 0, sizeof(st));
1280 rc = ll_glimpse_ioctl(sbi, lsm, &st);
1284 if (cfs_copy_to_user(&lumd->lmd_st, &st, sizeof(st)))
1285 GOTO(free_lsm, rc = -EFAULT);
1289 obd_free_memmd(sbi->ll_dt_exp, &lsm);
1291 OBD_FREE_LARGE(lmm, lmmsize);
1294 case OBD_IOC_LLOG_CATINFO: {
1295 struct ptlrpc_request *req = NULL;
1300 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
1305 if (!data->ioc_inlbuf1) {
1306 obd_ioctl_freedata(buf, len);
1310 req = ptlrpc_request_alloc(sbi2mdc(sbi)->cl_import,
1313 GOTO(out_catinfo, rc = -ENOMEM);
1315 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
1317 req_capsule_set_size(&req->rq_pill, &RMF_STRING, RCL_CLIENT,
1320 rc = ptlrpc_request_pack(req, LUSTRE_LOG_VERSION, LLOG_CATINFO);
1322 ptlrpc_request_free(req);
1323 GOTO(out_catinfo, rc);
1326 str = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
1327 memcpy(str, data->ioc_inlbuf1, data->ioc_inllen1);
1328 if (data->ioc_inllen2) {
1329 str = req_capsule_client_get(&req->rq_pill,
1331 memcpy(str, data->ioc_inlbuf2, data->ioc_inllen2);
1334 req_capsule_set_size(&req->rq_pill, &RMF_STRING, RCL_SERVER,
1336 ptlrpc_request_set_replen(req);
1338 rc = ptlrpc_queue_wait(req);
1340 str = req_capsule_server_get(&req->rq_pill,
1342 if (cfs_copy_to_user(data->ioc_pbuf1, str,
1346 ptlrpc_req_finished(req);
1348 obd_ioctl_freedata(buf, len);
1351 case OBD_IOC_QUOTACHECK: {
1352 struct obd_quotactl *oqctl;
1355 if (!cfs_capable(CFS_CAP_SYS_ADMIN) ||
1356 sbi->ll_flags & LL_SBI_RMT_CLIENT)
1359 OBD_ALLOC_PTR(oqctl);
1362 oqctl->qc_type = arg;
1363 rc = obd_quotacheck(sbi->ll_md_exp, oqctl);
1365 CDEBUG(D_INFO, "md_quotacheck failed: rc %d\n", rc);
1369 rc = obd_quotacheck(sbi->ll_dt_exp, oqctl);
1371 CDEBUG(D_INFO, "obd_quotacheck failed: rc %d\n", rc);
1373 OBD_FREE_PTR(oqctl);
1376 case OBD_IOC_POLL_QUOTACHECK: {
1377 struct if_quotacheck *check;
1379 if (!cfs_capable(CFS_CAP_SYS_ADMIN) ||
1380 sbi->ll_flags & LL_SBI_RMT_CLIENT)
1383 OBD_ALLOC_PTR(check);
1387 rc = obd_iocontrol(cmd, sbi->ll_md_exp, 0, (void *)check,
1390 CDEBUG(D_QUOTA, "mdc ioctl %d failed: %d\n", cmd, rc);
1391 if (cfs_copy_to_user((void *)arg, check,
1393 CDEBUG(D_QUOTA, "cfs_copy_to_user failed\n");
1397 rc = obd_iocontrol(cmd, sbi->ll_dt_exp, 0, (void *)check,
1400 CDEBUG(D_QUOTA, "osc ioctl %d failed: %d\n", cmd, rc);
1401 if (cfs_copy_to_user((void *)arg, check,
1403 CDEBUG(D_QUOTA, "cfs_copy_to_user failed\n");
1407 OBD_FREE_PTR(check);
1410 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2,7,50,0)
1411 case LL_IOC_QUOTACTL_18: {
1412 /* copy the old 1.x quota struct for internal use, then copy
1413 * back into old format struct. For 1.8 compatibility. */
1414 struct if_quotactl_18 *qctl_18;
1415 struct if_quotactl *qctl_20;
1417 OBD_ALLOC_PTR(qctl_18);
1421 OBD_ALLOC_PTR(qctl_20);
1423 GOTO(out_quotactl_18, rc = -ENOMEM);
1425 if (cfs_copy_from_user(qctl_18, (void *)arg, sizeof(*qctl_18)))
1426 GOTO(out_quotactl_20, rc = -ENOMEM);
1428 QCTL_COPY(qctl_20, qctl_18);
1429 qctl_20->qc_idx = 0;
1431 /* XXX: dqb_valid was borrowed as a flag to mark that
1432 * only mds quota is wanted */
1433 if (qctl_18->qc_cmd == Q_GETQUOTA &&
1434 qctl_18->qc_dqblk.dqb_valid) {
1435 qctl_20->qc_valid = QC_MDTIDX;
1436 qctl_20->qc_dqblk.dqb_valid = 0;
1437 } else if (qctl_18->obd_uuid.uuid[0] != '\0') {
1438 qctl_20->qc_valid = QC_UUID;
1439 qctl_20->obd_uuid = qctl_18->obd_uuid;
1441 qctl_20->qc_valid = QC_GENERAL;
1444 rc = quotactl_ioctl(sbi, qctl_20);
1447 QCTL_COPY(qctl_18, qctl_20);
1448 qctl_18->obd_uuid = qctl_20->obd_uuid;
1450 if (cfs_copy_to_user((void *)arg, qctl_18,
1456 OBD_FREE_PTR(qctl_20);
1458 OBD_FREE_PTR(qctl_18);
1462 #warning "remove old LL_IOC_QUOTACTL_18 compatibility code"
1463 #endif /* LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2,7,50,0) */
1464 case LL_IOC_QUOTACTL: {
1465 struct if_quotactl *qctl;
1467 OBD_ALLOC_PTR(qctl);
1471 if (cfs_copy_from_user(qctl, (void *)arg, sizeof(*qctl)))
1472 GOTO(out_quotactl, rc = -EFAULT);
1474 rc = quotactl_ioctl(sbi, qctl);
1476 if (rc == 0 && cfs_copy_to_user((void *)arg,qctl,sizeof(*qctl)))
1483 case OBD_IOC_GETDTNAME:
1484 case OBD_IOC_GETMDNAME:
1485 RETURN(ll_get_obd_name(inode, cmd, arg));
1486 case LL_IOC_FLUSHCTX:
1487 RETURN(ll_flush_ctx(inode));
1488 #ifdef CONFIG_FS_POSIX_ACL
1489 case LL_IOC_RMTACL: {
1490 if (sbi->ll_flags & LL_SBI_RMT_CLIENT &&
1491 inode == inode->i_sb->s_root->d_inode) {
1492 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1494 LASSERT(fd != NULL);
1495 rc = rct_add(&sbi->ll_rct, cfs_curproc_pid(), arg);
1497 fd->fd_flags |= LL_FILE_RMTACL;
1503 case LL_IOC_GETOBDCOUNT: {
1505 struct obd_export *exp;
1507 if (cfs_copy_from_user(&count, (int *)arg, sizeof(int)))
1510 /* get ost count when count is zero, get mdt count otherwise */
1511 exp = count ? sbi->ll_md_exp : sbi->ll_dt_exp;
1512 vallen = sizeof(count);
1513 rc = obd_get_info(exp, sizeof(KEY_TGT_COUNT), KEY_TGT_COUNT,
1514 &vallen, &count, NULL);
1516 CERROR("get target count failed: %d\n", rc);
1520 if (cfs_copy_to_user((int *)arg, &count, sizeof(int)))
1525 case LL_IOC_PATH2FID:
1526 if (cfs_copy_to_user((void *)arg, ll_inode2fid(inode),
1527 sizeof(struct lu_fid)))
1530 case LL_IOC_GET_CONNECT_FLAGS: {
1531 RETURN(obd_iocontrol(cmd, sbi->ll_md_exp, 0, NULL, (void*)arg));
1533 case OBD_IOC_CHANGELOG_SEND:
1534 case OBD_IOC_CHANGELOG_CLEAR:
1535 rc = copy_and_ioctl(cmd, sbi->ll_md_exp, (void *)arg,
1536 sizeof(struct ioc_changelog));
1538 case OBD_IOC_FID2PATH:
1539 RETURN(ll_fid2path(ll_i2mdexp(inode), (void *)arg));
1540 case LL_IOC_HSM_CT_START:
1541 rc = copy_and_ioctl(cmd, sbi->ll_md_exp, (void *)arg,
1542 sizeof(struct lustre_kernelcomm));
1546 RETURN(obd_iocontrol(cmd, sbi->ll_dt_exp,0,NULL,(void *)arg));
1550 static loff_t ll_dir_seek(struct file *file, loff_t offset, int origin)
1552 struct inode *inode = file->f_mapping->host;
1553 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1554 struct ll_sb_info *sbi = ll_i2sbi(inode);
1555 int api32 = ll_need_32bit_api(sbi);
1556 loff_t ret = -EINVAL;
1559 cfs_mutex_lock(&inode->i_mutex);
1564 offset += file->f_pos;
1570 offset += LL_DIR_END_OFF_32BIT;
1572 offset += LL_DIR_END_OFF;
1579 ((api32 && offset <= LL_DIR_END_OFF_32BIT) ||
1580 (!api32 && offset <= LL_DIR_END_OFF))) {
1581 if (offset != file->f_pos) {
1582 if ((api32 && offset == LL_DIR_END_OFF_32BIT) ||
1583 (!api32 && offset == LL_DIR_END_OFF))
1584 fd->fd_dir.lfd_pos = MDS_DIR_END_OFF;
1585 else if (api32 && sbi->ll_flags & LL_SBI_64BIT_HASH)
1586 fd->fd_dir.lfd_pos = offset << 32;
1588 fd->fd_dir.lfd_pos = offset;
1589 file->f_pos = offset;
1590 file->f_version = 0;
1597 cfs_mutex_unlock(&inode->i_mutex);
1601 int ll_dir_open(struct inode *inode, struct file *file)
1604 RETURN(ll_file_open(inode, file));
1607 int ll_dir_release(struct inode *inode, struct file *file)
1610 RETURN(ll_file_release(inode, file));
1613 struct file_operations ll_dir_operations = {
1614 .llseek = ll_dir_seek,
1615 .open = ll_dir_open,
1616 .release = ll_dir_release,
1617 .read = generic_read_dir,
1618 .readdir = ll_readdir,
1619 #ifdef HAVE_UNLOCKED_IOCTL
1620 .unlocked_ioctl = ll_dir_ioctl,
1622 .ioctl = ll_dir_ioctl,