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, Intel Corporation.
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/uaccess.h>
45 #include <linux/buffer_head.h> /* for wait_on_buffer */
46 #include <linux/pagevec.h>
47 #include <linux/prefetch.h>
49 #define DEBUG_SUBSYSTEM S_LLITE
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"
61 * (new) readdir implementation overview.
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:
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
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.
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:
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);
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.
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).
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".
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.
115 * 1. directory positioning
117 * When seekdir(hash) is called, original
128 * identification of and access to overflow pages
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().
142 /* returns the page unlocked, but with a reference */
143 static int ll_dir_filler(void *_hash
, struct page
*page0
)
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
;
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 */
161 CDEBUG(D_VFSTRACE
, "VFS Op:inode=%lu/%u(%p) hash %llu\n",
162 inode
->i_ino
, inode
->i_generation
, inode
, hash
);
164 LASSERT(max_pages
> 0 && max_pages
<= MD_MAX_BRW_PAGES
);
166 page_pool
= kcalloc(max_pages
, sizeof(page
), GFP_NOFS
);
168 page_pool
[0] = page0
;
173 for (npages
= 1; npages
< max_pages
; npages
++) {
174 page
= page_cache_alloc_cold(inode
->i_mapping
);
177 page_pool
[npages
] = page
;
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
);
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
);
194 if (body
->valid
& OBD_MD_FLSIZE
)
195 cl_isize_write(inode
, body
->size
);
197 nrdpgs
= (request
->rq_bulk
->bd_nob_transferred
+PAGE_CACHE_SIZE
-1)
199 SetPageUptodate(page0
);
202 ptlrpc_req_finished(request
);
204 CDEBUG(D_VFSTRACE
, "read %d/%d pages\n", nrdpgs
, npages
);
206 ll_pagevec_init(&lru_pvec
, 0);
207 for (i
= 1; i
< npages
; i
++) {
208 unsigned long offset
;
213 if (rc
< 0 || i
>= nrdpgs
) {
214 page_cache_release(page
);
218 SetPageUptodate(page
);
221 hash
= le64_to_cpu(dp
->ldp_hash_start
);
224 offset
= hash_x_index(hash
, hash64
);
226 prefetchw(&page
->flags
);
227 ret
= add_to_page_cache_lru(page
, inode
->i_mapping
, offset
,
231 if (ll_pagevec_add(&lru_pvec
, page
) == 0)
232 ll_pagevec_lru_add_file(&lru_pvec
);
234 CDEBUG(D_VFSTRACE
, "page %lu add to page cache failed: %d\n",
237 page_cache_release(page
);
239 ll_pagevec_lru_add_file(&lru_pvec
);
241 if (page_pool
!= &page0
)
242 OBD_FREE(page_pool
, sizeof(struct page
*) * max_pages
);
246 static void ll_check_page(struct inode
*dir
, struct page
*page
)
248 /* XXX: check page format later */
249 SetPageChecked(page
);
252 void ll_release_page(struct page
*page
, int remove
)
257 if (likely(page
->mapping
!= NULL
))
258 truncate_complete_page(page
->mapping
, page
);
261 page_cache_release(page
);
265 * Find, kmap and return page that contains given hash.
267 static struct page
*ll_dir_page_locate(struct inode
*dir
, __u64
*hash
,
268 __u64
*start
, __u64
*end
)
270 int hash64
= ll_i2sbi(dir
)->ll_flags
& LL_SBI_64BIT_HASH
;
271 struct address_space
*mapping
= dir
->i_mapping
;
273 * Complement of hash is used as an index so that
274 * radix_tree_gang_lookup() can be used to find a page with starting
275 * hash _smaller_ than one we are looking for.
277 unsigned long offset
= hash_x_index(*hash
, hash64
);
281 spin_lock_irq(&mapping
->tree_lock
);
282 found
= radix_tree_gang_lookup(&mapping
->page_tree
,
283 (void **)&page
, offset
, 1);
284 if (found
> 0 && !radix_tree_exceptional_entry(page
)) {
285 struct lu_dirpage
*dp
;
287 page_cache_get(page
);
288 spin_unlock_irq(&mapping
->tree_lock
);
290 * In contrast to find_lock_page() we are sure that directory
291 * page cannot be truncated (while DLM lock is held) and,
292 * hence, can avoid restart.
294 * In fact, page cannot be locked here at all, because
295 * ll_dir_filler() does synchronous io.
297 wait_on_page_locked(page
);
298 if (PageUptodate(page
)) {
300 if (BITS_PER_LONG
== 32 && hash64
) {
301 *start
= le64_to_cpu(dp
->ldp_hash_start
) >> 32;
302 *end
= le64_to_cpu(dp
->ldp_hash_end
) >> 32;
305 *start
= le64_to_cpu(dp
->ldp_hash_start
);
306 *end
= le64_to_cpu(dp
->ldp_hash_end
);
308 LASSERTF(*start
<= *hash
, "start = %#llx,end = %#llx,hash = %#llx\n",
309 *start
, *end
, *hash
);
310 CDEBUG(D_VFSTRACE
, "page %lu [%llu %llu], hash %llu\n",
311 offset
, *start
, *end
, *hash
);
313 ll_release_page(page
, 0);
315 } else if (*end
!= *start
&& *hash
== *end
) {
317 * upon hash collision, remove this page,
318 * otherwise put page reference, and
319 * ll_get_dir_page() will issue RPC to fetch
322 ll_release_page(page
,
323 le32_to_cpu(dp
->ldp_flags
) & LDF_COLLIDE
);
327 page_cache_release(page
);
328 page
= ERR_PTR(-EIO
);
332 spin_unlock_irq(&mapping
->tree_lock
);
338 struct page
*ll_get_dir_page(struct inode
*dir
, __u64 hash
,
339 struct ll_dir_chain
*chain
)
341 ldlm_policy_data_t policy
= {.l_inodebits
= {MDS_INODELOCK_UPDATE
} };
342 struct address_space
*mapping
= dir
->i_mapping
;
343 struct lustre_handle lockh
;
344 struct lu_dirpage
*dp
;
351 struct ll_inode_info
*lli
= ll_i2info(dir
);
352 int hash64
= ll_i2sbi(dir
)->ll_flags
& LL_SBI_64BIT_HASH
;
355 rc
= md_lock_match(ll_i2sbi(dir
)->ll_md_exp
, LDLM_FL_BLOCK_GRANTED
,
356 ll_inode2fid(dir
), LDLM_IBITS
, &policy
, mode
, &lockh
);
358 struct ldlm_enqueue_info einfo
= {
359 .ei_type
= LDLM_IBITS
,
361 .ei_cb_bl
= ll_md_blocking_ast
,
362 .ei_cb_cp
= ldlm_completion_ast
,
364 struct lookup_intent it
= { .it_op
= IT_READDIR
};
365 struct ptlrpc_request
*request
;
366 struct md_op_data
*op_data
;
368 op_data
= ll_prep_md_op_data(NULL
, dir
, dir
, NULL
, 0, 0,
369 LUSTRE_OPC_ANY
, NULL
);
371 return (void *)op_data
;
373 rc
= md_enqueue(ll_i2sbi(dir
)->ll_md_exp
, &einfo
, &it
,
374 op_data
, &lockh
, NULL
, 0, NULL
, 0);
376 ll_finish_md_op_data(op_data
);
378 request
= (struct ptlrpc_request
*)it
.d
.lustre
.it_data
;
380 ptlrpc_req_finished(request
);
382 CERROR("lock enqueue: "DFID
" at %llu: rc %d\n",
383 PFID(ll_inode2fid(dir
)), hash
, rc
);
387 CDEBUG(D_INODE
, "setting lr_lvb_inode to inode %p (%lu/%u)\n",
388 dir
, dir
->i_ino
, dir
->i_generation
);
389 md_set_lock_data(ll_i2sbi(dir
)->ll_md_exp
,
390 &it
.d
.lustre
.it_lock_handle
, dir
, NULL
);
392 /* for cross-ref object, l_ast_data of the lock may not be set,
393 * we reset it here */
394 md_set_lock_data(ll_i2sbi(dir
)->ll_md_exp
, &lockh
.cookie
,
397 ldlm_lock_dump_handle(D_OTHER
, &lockh
);
399 mutex_lock(&lli
->lli_readdir_mutex
);
400 page
= ll_dir_page_locate(dir
, &lhash
, &start
, &end
);
402 CERROR("dir page locate: "DFID
" at %llu: rc %ld\n",
403 PFID(ll_inode2fid(dir
)), lhash
, PTR_ERR(page
));
405 } else if (page
!= NULL
) {
407 * XXX nikita: not entirely correct handling of a corner case:
408 * suppose hash chain of entries with hash value HASH crosses
409 * border between pages P0 and P1. First both P0 and P1 are
410 * cached, seekdir() is called for some entry from the P0 part
411 * of the chain. Later P0 goes out of cache. telldir(HASH)
412 * happens and finds P1, as it starts with matching hash
413 * value. Remaining entries from P0 part of the chain are
414 * skipped. (Is that really a bug?)
416 * Possible solutions: 0. don't cache P1 is such case, handle
417 * it as an "overflow" page. 1. invalidate all pages at
418 * once. 2. use HASH|1 as an index for P1.
423 page
= read_cache_page(mapping
, hash_x_index(hash
, hash64
),
424 ll_dir_filler
, &lhash
);
426 CERROR("read cache page: "DFID
" at %llu: rc %ld\n",
427 PFID(ll_inode2fid(dir
)), hash
, PTR_ERR(page
));
431 wait_on_page_locked(page
);
433 if (!PageUptodate(page
)) {
434 CERROR("page not updated: "DFID
" at %llu: rc %d\n",
435 PFID(ll_inode2fid(dir
)), hash
, -5);
438 if (!PageChecked(page
))
439 ll_check_page(dir
, page
);
440 if (PageError(page
)) {
441 CERROR("page error: "DFID
" at %llu: rc %d\n",
442 PFID(ll_inode2fid(dir
)), hash
, -5);
446 dp
= page_address(page
);
447 if (BITS_PER_LONG
== 32 && hash64
) {
448 start
= le64_to_cpu(dp
->ldp_hash_start
) >> 32;
449 end
= le64_to_cpu(dp
->ldp_hash_end
) >> 32;
452 start
= le64_to_cpu(dp
->ldp_hash_start
);
453 end
= le64_to_cpu(dp
->ldp_hash_end
);
457 LASSERT(start
== lhash
);
458 CWARN("Page-wide hash collision: %llu\n", end
);
459 if (BITS_PER_LONG
== 32 && hash64
)
460 CWARN("Real page-wide hash collision at [%llu %llu] with hash %llu\n",
461 le64_to_cpu(dp
->ldp_hash_start
),
462 le64_to_cpu(dp
->ldp_hash_end
), hash
);
464 * Fetch whole overflow chain...
471 mutex_unlock(&lli
->lli_readdir_mutex
);
472 ldlm_lock_decref(&lockh
, mode
);
476 ll_release_page(page
, 1);
477 page
= ERR_PTR(-EIO
);
481 int ll_dir_read(struct inode
*inode
, struct dir_context
*ctx
)
483 struct ll_inode_info
*info
= ll_i2info(inode
);
484 struct ll_sb_info
*sbi
= ll_i2sbi(inode
);
485 __u64 pos
= ctx
->pos
;
486 int api32
= ll_need_32bit_api(sbi
);
487 int hash64
= sbi
->ll_flags
& LL_SBI_64BIT_HASH
;
489 struct ll_dir_chain chain
;
493 ll_dir_chain_init(&chain
);
495 page
= ll_get_dir_page(inode
, pos
, &chain
);
497 while (rc
== 0 && !done
) {
498 struct lu_dirpage
*dp
;
499 struct lu_dirent
*ent
;
503 * If page is empty (end of directory is reached),
506 __u64 hash
= MDS_DIR_END_OFF
;
509 dp
= page_address(page
);
510 for (ent
= lu_dirent_start(dp
); ent
!= NULL
&& !done
;
511 ent
= lu_dirent_next(ent
)) {
519 * XXX: implement correct swabbing here.
522 hash
= le64_to_cpu(ent
->lde_hash
);
525 * Skip until we find target hash
530 namelen
= le16_to_cpu(ent
->lde_namelen
);
541 fid_le_to_cpu(&fid
, &ent
->lde_fid
);
542 ino
= cl_fid_build_ino(&fid
, api32
);
543 type
= ll_dirent_type_get(ent
);
545 /* For 'll_nfs_get_name_filldir()', it will try
546 * to access the 'ent' through its 'lde_name',
547 * so the parameter 'name' for 'ctx->actor()'
548 * must be part of the 'ent'.
550 done
= !dir_emit(ctx
, ent
->lde_name
,
553 next
= le64_to_cpu(dp
->ldp_hash_end
);
556 if (pos
== MDS_DIR_END_OFF
) {
558 * End of directory reached.
561 ll_release_page(page
, 0);
562 } else if (1 /* chain is exhausted*/) {
564 * Normal case: continue to the next
567 ll_release_page(page
,
568 le32_to_cpu(dp
->ldp_flags
) &
571 page
= ll_get_dir_page(inode
, pos
,
575 * go into overflow page.
577 LASSERT(le32_to_cpu(dp
->ldp_flags
) &
579 ll_release_page(page
, 1);
583 ll_release_page(page
, 0);
587 CERROR("error reading dir "DFID
" at %lu: rc %d\n",
588 PFID(&info
->lli_fid
), (unsigned long)pos
, rc
);
593 ll_dir_chain_fini(&chain
);
597 static int ll_readdir(struct file
*filp
, struct dir_context
*ctx
)
599 struct inode
*inode
= file_inode(filp
);
600 struct ll_file_data
*lfd
= LUSTRE_FPRIVATE(filp
);
601 struct ll_sb_info
*sbi
= ll_i2sbi(inode
);
602 int hash64
= sbi
->ll_flags
& LL_SBI_64BIT_HASH
;
603 int api32
= ll_need_32bit_api(sbi
);
606 CDEBUG(D_VFSTRACE
, "VFS Op:inode=%lu/%u(%p) pos %lu/%llu 32bit_api %d\n",
607 inode
->i_ino
, inode
->i_generation
,
608 inode
, (unsigned long)lfd
->lfd_pos
, i_size_read(inode
), api32
);
610 if (lfd
->lfd_pos
== MDS_DIR_END_OFF
) {
618 ctx
->pos
= lfd
->lfd_pos
;
619 rc
= ll_dir_read(inode
, ctx
);
620 lfd
->lfd_pos
= ctx
->pos
;
621 if (ctx
->pos
== MDS_DIR_END_OFF
) {
623 ctx
->pos
= LL_DIR_END_OFF_32BIT
;
625 ctx
->pos
= LL_DIR_END_OFF
;
630 filp
->f_version
= inode
->i_version
;
634 ll_stats_ops_tally(sbi
, LPROC_LL_READDIR
, 1);
639 static int ll_send_mgc_param(struct obd_export
*mgc
, char *string
)
641 struct mgs_send_param
*msp
;
644 msp
= kzalloc(sizeof(*msp
), GFP_NOFS
);
648 strncpy(msp
->mgs_param
, string
, MGS_PARAM_MAXLEN
);
649 rc
= obd_set_info_async(NULL
, mgc
, sizeof(KEY_SET_INFO
), KEY_SET_INFO
,
650 sizeof(struct mgs_send_param
), msp
, NULL
);
652 CERROR("Failed to set parameter: %d\n", rc
);
658 static int ll_dir_setdirstripe(struct inode
*dir
, struct lmv_user_md
*lump
,
661 struct ptlrpc_request
*request
= NULL
;
662 struct md_op_data
*op_data
;
663 struct ll_sb_info
*sbi
= ll_i2sbi(dir
);
667 mode
= (0755 & ~current_umask()) | S_IFDIR
;
668 op_data
= ll_prep_md_op_data(NULL
, dir
, NULL
, filename
,
669 strlen(filename
), mode
, LUSTRE_OPC_MKDIR
,
671 if (IS_ERR(op_data
)) {
672 err
= PTR_ERR(op_data
);
676 op_data
->op_cli_flags
|= CLI_SET_MEA
;
677 err
= md_create(sbi
->ll_md_exp
, op_data
, lump
, sizeof(*lump
), mode
,
678 from_kuid(&init_user_ns
, current_fsuid()),
679 from_kgid(&init_user_ns
, current_fsgid()),
680 cfs_curproc_cap_pack(), 0, &request
);
681 ll_finish_md_op_data(op_data
);
685 ptlrpc_req_finished(request
);
689 int ll_dir_setstripe(struct inode
*inode
, struct lov_user_md
*lump
,
692 struct ll_sb_info
*sbi
= ll_i2sbi(inode
);
693 struct md_op_data
*op_data
;
694 struct ptlrpc_request
*req
= NULL
;
696 struct lustre_sb_info
*lsi
= s2lsi(inode
->i_sb
);
697 struct obd_device
*mgc
= lsi
->lsi_mgc
;
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: %#08x != %#08x nor %#08x\n",
722 lump
->lmm_magic
, LOV_USER_MAGIC_V1
,
728 lum_size
= sizeof(struct lov_user_md_v1
);
731 op_data
= ll_prep_md_op_data(NULL
, inode
, NULL
, NULL
, 0, 0,
732 LUSTRE_OPC_ANY
, NULL
);
734 return PTR_ERR(op_data
);
736 if (lump
!= NULL
&& lump
->lmm_magic
== cpu_to_le32(LMV_USER_MAGIC
))
737 op_data
->op_cli_flags
|= CLI_SET_MEA
;
739 /* swabbing is done in lov_setstripe() on server side */
740 rc
= md_setattr(sbi
->ll_md_exp
, op_data
, lump
, lum_size
,
741 NULL
, 0, &req
, NULL
);
742 ll_finish_md_op_data(op_data
);
743 ptlrpc_req_finished(req
);
745 if (rc
!= -EPERM
&& rc
!= -EACCES
)
746 CERROR("mdc_setattr fails: rc = %d\n", rc
);
749 /* In the following we use the fact that LOV_USER_MAGIC_V1 and
750 LOV_USER_MAGIC_V3 have the same initial fields so we do not
751 need to make the distinction between the 2 versions */
752 if (set_default
&& mgc
->u
.cli
.cl_mgc_mgsexp
) {
756 param
= kzalloc(MGS_PARAM_MAXLEN
, GFP_NOFS
);
763 /* Get fsname and assume devname to be -MDT0000. */
764 ll_get_fsname(inode
->i_sb
, buf
, MTI_NAME_MAXLEN
);
765 strcat(buf
, "-MDT0000.lov");
768 /* Set root stripesize */
769 sprintf(buf
, ".stripesize=%u",
770 lump
? le32_to_cpu(lump
->lmm_stripe_size
) : 0);
771 rc
= ll_send_mgc_param(mgc
->u
.cli
.cl_mgc_mgsexp
, param
);
775 /* Set root stripecount */
776 sprintf(buf
, ".stripecount=%hd",
777 lump
? le16_to_cpu(lump
->lmm_stripe_count
) : 0);
778 rc
= ll_send_mgc_param(mgc
->u
.cli
.cl_mgc_mgsexp
, param
);
782 /* Set root stripeoffset */
783 sprintf(buf
, ".stripeoffset=%hd",
784 lump
? le16_to_cpu(lump
->lmm_stripe_offset
) :
785 (typeof(lump
->lmm_stripe_offset
))(-1));
786 rc
= ll_send_mgc_param(mgc
->u
.cli
.cl_mgc_mgsexp
, param
);
790 OBD_FREE(param
, MGS_PARAM_MAXLEN
);
795 int ll_dir_getstripe(struct inode
*inode
, struct lov_mds_md
**lmmp
,
796 int *lmm_size
, struct ptlrpc_request
**request
)
798 struct ll_sb_info
*sbi
= ll_i2sbi(inode
);
799 struct mdt_body
*body
;
800 struct lov_mds_md
*lmm
= NULL
;
801 struct ptlrpc_request
*req
= NULL
;
803 struct md_op_data
*op_data
;
805 rc
= ll_get_default_mdsize(sbi
, &lmmsize
);
809 op_data
= ll_prep_md_op_data(NULL
, inode
, NULL
, NULL
,
810 0, lmmsize
, LUSTRE_OPC_ANY
,
813 return PTR_ERR(op_data
);
815 op_data
->op_valid
= OBD_MD_FLEASIZE
| OBD_MD_FLDIREA
;
816 rc
= md_getattr(sbi
->ll_md_exp
, op_data
, &req
);
817 ll_finish_md_op_data(op_data
);
819 CDEBUG(D_INFO
, "md_getattr failed on inode %lu/%u: rc %d\n",
821 inode
->i_generation
, rc
);
825 body
= req_capsule_server_get(&req
->rq_pill
, &RMF_MDT_BODY
);
826 LASSERT(body
!= NULL
);
828 lmmsize
= body
->eadatasize
;
830 if (!(body
->valid
& (OBD_MD_FLEASIZE
| OBD_MD_FLDIREA
)) ||
836 lmm
= req_capsule_server_sized_get(&req
->rq_pill
,
837 &RMF_MDT_MD
, lmmsize
);
838 LASSERT(lmm
!= NULL
);
841 * This is coming from the MDS, so is probably in
842 * little endian. We convert it to host endian before
843 * passing it to userspace.
845 /* We don't swab objects for directories */
846 switch (le32_to_cpu(lmm
->lmm_magic
)) {
848 if (LOV_MAGIC
!= cpu_to_le32(LOV_MAGIC
))
849 lustre_swab_lov_user_md_v1((struct lov_user_md_v1
*)lmm
);
852 if (LOV_MAGIC
!= cpu_to_le32(LOV_MAGIC
))
853 lustre_swab_lov_user_md_v3((struct lov_user_md_v3
*)lmm
);
856 CERROR("unknown magic: %lX\n", (unsigned long)lmm
->lmm_magic
);
867 * Get MDT index for the inode.
869 int ll_get_mdt_idx(struct inode
*inode
)
871 struct ll_sb_info
*sbi
= ll_i2sbi(inode
);
872 struct md_op_data
*op_data
;
875 op_data
= ll_prep_md_op_data(NULL
, inode
, NULL
, NULL
, 0,
876 0, LUSTRE_OPC_ANY
, NULL
);
878 return PTR_ERR(op_data
);
880 op_data
->op_flags
|= MF_GET_MDT_IDX
;
881 rc
= md_getattr(sbi
->ll_md_exp
, op_data
, NULL
);
882 mdtidx
= op_data
->op_mds
;
883 ll_finish_md_op_data(op_data
);
885 CDEBUG(D_INFO
, "md_getattr_name: %d\n", rc
);
892 * Generic handler to do any pre-copy work.
894 * It send a first hsm_progress (with extent length == 0) to coordinator as a
895 * first information for it that real work has started.
897 * Moreover, for a ARCHIVE request, it will sample the file data version and
898 * store it in \a copy.
900 * \return 0 on success.
902 static int ll_ioc_copy_start(struct super_block
*sb
, struct hsm_copy
*copy
)
904 struct ll_sb_info
*sbi
= ll_s2sbi(sb
);
905 struct hsm_progress_kernel hpk
;
908 /* Forge a hsm_progress based on data from copy. */
909 hpk
.hpk_fid
= copy
->hc_hai
.hai_fid
;
910 hpk
.hpk_cookie
= copy
->hc_hai
.hai_cookie
;
911 hpk
.hpk_extent
.offset
= copy
->hc_hai
.hai_extent
.offset
;
912 hpk
.hpk_extent
.length
= 0;
915 hpk
.hpk_data_version
= 0;
918 /* For archive request, we need to read the current file version. */
919 if (copy
->hc_hai
.hai_action
== HSMA_ARCHIVE
) {
921 __u64 data_version
= 0;
923 /* Get inode for this fid */
924 inode
= search_inode_for_lustre(sb
, ©
->hc_hai
.hai_fid
);
926 hpk
.hpk_flags
|= HP_FLAG_RETRY
;
927 /* hpk_errval is >= 0 */
928 hpk
.hpk_errval
= -PTR_ERR(inode
);
933 /* Read current file data version */
934 rc
= ll_data_version(inode
, &data_version
, 1);
937 CDEBUG(D_HSM
, "Could not read file data version of "
938 DFID
" (rc = %d). Archive request (%#llx) could not be done.\n",
939 PFID(©
->hc_hai
.hai_fid
), rc
,
940 copy
->hc_hai
.hai_cookie
);
941 hpk
.hpk_flags
|= HP_FLAG_RETRY
;
942 /* hpk_errval must be >= 0 */
943 hpk
.hpk_errval
= -rc
;
947 /* Store it the hsm_copy for later copytool use.
948 * Always modified even if no lsm. */
949 copy
->hc_data_version
= data_version
;
953 rc
= obd_iocontrol(LL_IOC_HSM_PROGRESS
, sbi
->ll_md_exp
, sizeof(hpk
),
960 * Generic handler to do any post-copy work.
962 * It will send the last hsm_progress update to coordinator to inform it
963 * that copy is finished and whether it was successful or not.
966 * - for ARCHIVE request, it will sample the file data version and compare it
967 * with the version saved in ll_ioc_copy_start(). If they do not match, copy
968 * will be considered as failed.
969 * - for RESTORE request, it will sample the file data version and send it to
970 * coordinator which is useful if the file was imported as 'released'.
972 * \return 0 on success.
974 static int ll_ioc_copy_end(struct super_block
*sb
, struct hsm_copy
*copy
)
976 struct ll_sb_info
*sbi
= ll_s2sbi(sb
);
977 struct hsm_progress_kernel hpk
;
980 /* If you modify the logic here, also check llapi_hsm_copy_end(). */
981 /* Take care: copy->hc_hai.hai_action, len, gid and data are not
982 * initialized if copy_end was called with copy == NULL.
985 /* Forge a hsm_progress based on data from copy. */
986 hpk
.hpk_fid
= copy
->hc_hai
.hai_fid
;
987 hpk
.hpk_cookie
= copy
->hc_hai
.hai_cookie
;
988 hpk
.hpk_extent
= copy
->hc_hai
.hai_extent
;
989 hpk
.hpk_flags
= copy
->hc_flags
| HP_FLAG_COMPLETED
;
990 hpk
.hpk_errval
= copy
->hc_errval
;
991 hpk
.hpk_data_version
= 0;
993 /* For archive request, we need to check the file data was not changed.
995 * For restore request, we need to send the file data version, this is
996 * useful when the file was created using hsm_import.
998 if (((copy
->hc_hai
.hai_action
== HSMA_ARCHIVE
) ||
999 (copy
->hc_hai
.hai_action
== HSMA_RESTORE
)) &&
1000 (copy
->hc_errval
== 0)) {
1001 struct inode
*inode
;
1002 __u64 data_version
= 0;
1004 /* Get lsm for this fid */
1005 inode
= search_inode_for_lustre(sb
, ©
->hc_hai
.hai_fid
);
1006 if (IS_ERR(inode
)) {
1007 hpk
.hpk_flags
|= HP_FLAG_RETRY
;
1008 /* hpk_errval must be >= 0 */
1009 hpk
.hpk_errval
= -PTR_ERR(inode
);
1010 rc
= PTR_ERR(inode
);
1014 rc
= ll_data_version(inode
, &data_version
,
1015 copy
->hc_hai
.hai_action
== HSMA_ARCHIVE
);
1018 CDEBUG(D_HSM
, "Could not read file data version. Request could not be confirmed.\n");
1019 if (hpk
.hpk_errval
== 0)
1020 hpk
.hpk_errval
= -rc
;
1024 /* Store it the hsm_copy for later copytool use.
1025 * Always modified even if no lsm. */
1026 hpk
.hpk_data_version
= data_version
;
1028 /* File could have been stripped during archiving, so we need
1029 * to check anyway. */
1030 if ((copy
->hc_hai
.hai_action
== HSMA_ARCHIVE
) &&
1031 (copy
->hc_data_version
!= data_version
)) {
1032 CDEBUG(D_HSM
, "File data version mismatched. File content was changed during archiving. "
1033 DFID
", start:%#llx current:%#llx\n",
1034 PFID(©
->hc_hai
.hai_fid
),
1035 copy
->hc_data_version
, data_version
);
1036 /* File was changed, send error to cdt. Do not ask for
1037 * retry because if a file is modified frequently,
1038 * the cdt will loop on retried archive requests.
1039 * The policy engine will ask for a new archive later
1040 * when the file will not be modified for some tunable
1042 /* we do not notify caller */
1043 hpk
.hpk_flags
&= ~HP_FLAG_RETRY
;
1044 /* hpk_errval must be >= 0 */
1045 hpk
.hpk_errval
= EBUSY
;
1051 rc
= obd_iocontrol(LL_IOC_HSM_PROGRESS
, sbi
->ll_md_exp
, sizeof(hpk
),
1058 static int copy_and_ioctl(int cmd
, struct obd_export
*exp
,
1059 const void __user
*data
, size_t size
)
1064 copy
= kzalloc(size
, GFP_NOFS
);
1068 if (copy_from_user(copy
, data
, size
)) {
1073 rc
= obd_iocontrol(cmd
, exp
, size
, copy
, NULL
);
1075 OBD_FREE(copy
, size
);
1080 static int quotactl_ioctl(struct ll_sb_info
*sbi
, struct if_quotactl
*qctl
)
1082 int cmd
= qctl
->qc_cmd
;
1083 int type
= qctl
->qc_type
;
1084 int id
= qctl
->qc_id
;
1085 int valid
= qctl
->qc_valid
;
1089 case LUSTRE_Q_INVALIDATE
:
1090 case LUSTRE_Q_FINVALIDATE
:
1095 if (!capable(CFS_CAP_SYS_ADMIN
) ||
1096 sbi
->ll_flags
& LL_SBI_RMT_CLIENT
)
1100 if (((type
== USRQUOTA
&&
1101 !uid_eq(current_euid(), make_kuid(&init_user_ns
, id
))) ||
1102 (type
== GRPQUOTA
&&
1103 !in_egroup_p(make_kgid(&init_user_ns
, id
)))) &&
1104 (!capable(CFS_CAP_SYS_ADMIN
) ||
1105 sbi
->ll_flags
& LL_SBI_RMT_CLIENT
))
1111 CERROR("unsupported quotactl op: %#x\n", cmd
);
1115 if (valid
!= QC_GENERAL
) {
1116 if (sbi
->ll_flags
& LL_SBI_RMT_CLIENT
)
1119 if (cmd
== Q_GETINFO
)
1120 qctl
->qc_cmd
= Q_GETOINFO
;
1121 else if (cmd
== Q_GETQUOTA
)
1122 qctl
->qc_cmd
= Q_GETOQUOTA
;
1128 rc
= obd_iocontrol(OBD_IOC_QUOTACTL
, sbi
->ll_md_exp
,
1129 sizeof(*qctl
), qctl
, NULL
);
1132 rc
= obd_iocontrol(OBD_IOC_QUOTACTL
, sbi
->ll_dt_exp
,
1133 sizeof(*qctl
), qctl
, NULL
);
1136 rc
= obd_iocontrol(OBD_IOC_QUOTACTL
, sbi
->ll_md_exp
,
1137 sizeof(*qctl
), qctl
, NULL
);
1139 rc
= obd_iocontrol(OBD_IOC_QUOTACTL
,
1141 sizeof(*qctl
), qctl
, NULL
);
1153 struct obd_quotactl
*oqctl
;
1155 oqctl
= kzalloc(sizeof(*oqctl
), GFP_NOFS
);
1159 QCTL_COPY(oqctl
, qctl
);
1160 rc
= obd_quotactl(sbi
->ll_md_exp
, oqctl
);
1162 if (rc
!= -EALREADY
&& cmd
== Q_QUOTAON
) {
1163 oqctl
->qc_cmd
= Q_QUOTAOFF
;
1164 obd_quotactl(sbi
->ll_md_exp
, oqctl
);
1166 OBD_FREE_PTR(oqctl
);
1169 /* If QIF_SPACE is not set, client should collect the
1170 * space usage from OSSs by itself */
1171 if (cmd
== Q_GETQUOTA
&&
1172 !(oqctl
->qc_dqblk
.dqb_valid
& QIF_SPACE
) &&
1173 !oqctl
->qc_dqblk
.dqb_curspace
) {
1174 struct obd_quotactl
*oqctl_tmp
;
1176 oqctl_tmp
= kzalloc(sizeof(*oqctl_tmp
), GFP_NOFS
);
1182 oqctl_tmp
->qc_cmd
= Q_GETOQUOTA
;
1183 oqctl_tmp
->qc_id
= oqctl
->qc_id
;
1184 oqctl_tmp
->qc_type
= oqctl
->qc_type
;
1186 /* collect space usage from OSTs */
1187 oqctl_tmp
->qc_dqblk
.dqb_curspace
= 0;
1188 rc
= obd_quotactl(sbi
->ll_dt_exp
, oqctl_tmp
);
1189 if (!rc
|| rc
== -EREMOTEIO
) {
1190 oqctl
->qc_dqblk
.dqb_curspace
=
1191 oqctl_tmp
->qc_dqblk
.dqb_curspace
;
1192 oqctl
->qc_dqblk
.dqb_valid
|= QIF_SPACE
;
1195 /* collect space & inode usage from MDTs */
1196 oqctl_tmp
->qc_dqblk
.dqb_curspace
= 0;
1197 oqctl_tmp
->qc_dqblk
.dqb_curinodes
= 0;
1198 rc
= obd_quotactl(sbi
->ll_md_exp
, oqctl_tmp
);
1199 if (!rc
|| rc
== -EREMOTEIO
) {
1200 oqctl
->qc_dqblk
.dqb_curspace
+=
1201 oqctl_tmp
->qc_dqblk
.dqb_curspace
;
1202 oqctl
->qc_dqblk
.dqb_curinodes
=
1203 oqctl_tmp
->qc_dqblk
.dqb_curinodes
;
1204 oqctl
->qc_dqblk
.dqb_valid
|= QIF_INODES
;
1206 oqctl
->qc_dqblk
.dqb_valid
&= ~QIF_SPACE
;
1209 OBD_FREE_PTR(oqctl_tmp
);
1212 QCTL_COPY(qctl
, oqctl
);
1213 OBD_FREE_PTR(oqctl
);
1220 ll_getname(const char __user
*filename
)
1223 char *tmp
= __getname();
1226 return ERR_PTR(-ENOMEM
);
1228 len
= strncpy_from_user(tmp
, filename
, PATH_MAX
);
1231 else if (len
> PATH_MAX
)
1232 ret
= -ENAMETOOLONG
;
1241 #define ll_putname(filename) __putname(filename)
1243 static long ll_dir_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
1245 struct inode
*inode
= file_inode(file
);
1246 struct ll_sb_info
*sbi
= ll_i2sbi(inode
);
1247 struct obd_ioctl_data
*data
;
1250 CDEBUG(D_VFSTRACE
, "VFS Op:inode=%lu/%u(%p), cmd=%#x\n",
1251 inode
->i_ino
, inode
->i_generation
, inode
, cmd
);
1253 /* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */
1254 if (_IOC_TYPE(cmd
) == 'T' || _IOC_TYPE(cmd
) == 't') /* tty ioctls */
1257 ll_stats_ops_tally(ll_i2sbi(inode
), LPROC_LL_IOCTL
, 1);
1259 case FSFILT_IOC_GETFLAGS
:
1260 case FSFILT_IOC_SETFLAGS
:
1261 return ll_iocontrol(inode
, file
, cmd
, arg
);
1262 case FSFILT_IOC_GETVERSION_OLD
:
1263 case FSFILT_IOC_GETVERSION
:
1264 return put_user(inode
->i_generation
, (int *)arg
);
1265 /* We need to special case any other ioctls we want to handle,
1266 * to send them to the MDS/OST as appropriate and to properly
1267 * network encode the arg field.
1268 case FSFILT_IOC_SETVERSION_OLD:
1269 case FSFILT_IOC_SETVERSION:
1271 case LL_IOC_GET_MDTIDX
: {
1274 mdtidx
= ll_get_mdt_idx(inode
);
1278 if (put_user((int)mdtidx
, (int *)arg
))
1283 case IOC_MDC_LOOKUP
: {
1284 struct ptlrpc_request
*request
= NULL
;
1285 int namelen
, len
= 0;
1288 struct md_op_data
*op_data
;
1290 rc
= obd_ioctl_getdata(&buf
, &len
, (void *)arg
);
1295 filename
= data
->ioc_inlbuf1
;
1296 namelen
= strlen(filename
);
1299 CDEBUG(D_INFO
, "IOC_MDC_LOOKUP missing filename\n");
1304 op_data
= ll_prep_md_op_data(NULL
, inode
, NULL
, filename
, namelen
,
1305 0, LUSTRE_OPC_ANY
, NULL
);
1306 if (IS_ERR(op_data
)) {
1307 rc
= PTR_ERR(op_data
);
1311 op_data
->op_valid
= OBD_MD_FLID
;
1312 rc
= md_getattr_name(sbi
->ll_md_exp
, op_data
, &request
);
1313 ll_finish_md_op_data(op_data
);
1315 CDEBUG(D_INFO
, "md_getattr_name: %d\n", rc
);
1318 ptlrpc_req_finished(request
);
1320 obd_ioctl_freedata(buf
, len
);
1323 case LL_IOC_LMV_SETSTRIPE
: {
1324 struct lmv_user_md
*lum
;
1332 rc
= obd_ioctl_getdata(&buf
, &len
, (void *)arg
);
1337 if (data
->ioc_inlbuf1
== NULL
|| data
->ioc_inlbuf2
== NULL
||
1338 data
->ioc_inllen1
== 0 || data
->ioc_inllen2
== 0) {
1343 filename
= data
->ioc_inlbuf1
;
1344 namelen
= data
->ioc_inllen1
;
1347 CDEBUG(D_INFO
, "IOC_MDC_LOOKUP missing filename\n");
1351 lum
= (struct lmv_user_md
*)data
->ioc_inlbuf2
;
1352 lumlen
= data
->ioc_inllen2
;
1354 if (lum
->lum_magic
!= LMV_USER_MAGIC
||
1355 lumlen
!= sizeof(*lum
)) {
1356 CERROR("%s: wrong lum magic %x or size %d: rc = %d\n",
1357 filename
, lum
->lum_magic
, lumlen
, -EFAULT
);
1363 * ll_dir_setdirstripe will be used to set dir stripe
1364 * mdc_create--->mdt_reint_create (with dirstripe)
1366 rc
= ll_dir_setdirstripe(inode
, lum
, filename
);
1368 obd_ioctl_freedata(buf
, len
);
1372 case LL_IOC_LOV_SETSTRIPE
: {
1373 struct lov_user_md_v3 lumv3
;
1374 struct lov_user_md_v1
*lumv1
= (struct lov_user_md_v1
*)&lumv3
;
1375 struct lov_user_md_v1
*lumv1p
= (struct lov_user_md_v1
*)arg
;
1376 struct lov_user_md_v3
*lumv3p
= (struct lov_user_md_v3
*)arg
;
1378 int set_default
= 0;
1380 LASSERT(sizeof(lumv3
) == sizeof(*lumv3p
));
1381 LASSERT(sizeof(lumv3
.lmm_objects
[0]) ==
1382 sizeof(lumv3p
->lmm_objects
[0]));
1383 /* first try with v1 which is smaller than v3 */
1384 if (copy_from_user(lumv1
, lumv1p
, sizeof(*lumv1
)))
1387 if (lumv1
->lmm_magic
== LOV_USER_MAGIC_V3
) {
1388 if (copy_from_user(&lumv3
, lumv3p
, sizeof(lumv3
)))
1392 if (is_root_inode(inode
))
1395 /* in v1 and v3 cases lumv1 points to data */
1396 rc
= ll_dir_setstripe(inode
, lumv1
, set_default
);
1400 case LL_IOC_LMV_GETSTRIPE
: {
1401 struct lmv_user_md
*lump
= (struct lmv_user_md
*)arg
;
1402 struct lmv_user_md lum
;
1403 struct lmv_user_md
*tmp
;
1408 if (copy_from_user(&lum
, lump
, sizeof(struct lmv_user_md
)))
1411 if (lum
.lum_magic
!= LMV_MAGIC_V1
)
1414 lum_size
= lmv_user_md_size(1, LMV_MAGIC_V1
);
1415 tmp
= kzalloc(lum_size
, GFP_NOFS
);
1422 tmp
->lum_type
= LMV_STRIPE_TYPE
;
1423 tmp
->lum_stripe_count
= 1;
1424 mdtindex
= ll_get_mdt_idx(inode
);
1430 tmp
->lum_stripe_offset
= mdtindex
;
1431 tmp
->lum_objects
[0].lum_mds
= mdtindex
;
1432 memcpy(&tmp
->lum_objects
[0].lum_fid
, ll_inode2fid(inode
),
1433 sizeof(struct lu_fid
));
1434 if (copy_to_user((void *)arg
, tmp
, lum_size
)) {
1440 OBD_FREE(tmp
, lum_size
);
1443 case LL_IOC_REMOVE_ENTRY
: {
1444 char *filename
= NULL
;
1448 /* Here is a little hack to avoid sending REINT_RMENTRY to
1449 * unsupported server, which might crash the server(LU-2730),
1450 * Because both LVB_TYPE and REINT_RMENTRY will be supported
1451 * on 2.4, we use OBD_CONNECT_LVB_TYPE to detect whether the
1452 * server will support REINT_RMENTRY XXX*/
1453 if (!(exp_connect_flags(sbi
->ll_md_exp
) & OBD_CONNECT_LVB_TYPE
))
1456 filename
= ll_getname((const char *)arg
);
1457 if (IS_ERR(filename
))
1458 return PTR_ERR(filename
);
1460 namelen
= strlen(filename
);
1466 rc
= ll_rmdir_entry(inode
, filename
, namelen
);
1469 ll_putname(filename
);
1472 case LL_IOC_LOV_SWAP_LAYOUTS
:
1474 case LL_IOC_OBD_STATFS
:
1475 return ll_obd_statfs(inode
, (void *)arg
);
1476 case LL_IOC_LOV_GETSTRIPE
:
1477 case LL_IOC_MDC_GETINFO
:
1478 case IOC_MDC_GETFILEINFO
:
1479 case IOC_MDC_GETFILESTRIPE
: {
1480 struct ptlrpc_request
*request
= NULL
;
1481 struct lov_user_md
*lump
;
1482 struct lov_mds_md
*lmm
= NULL
;
1483 struct mdt_body
*body
;
1484 char *filename
= NULL
;
1487 if (cmd
== IOC_MDC_GETFILEINFO
||
1488 cmd
== IOC_MDC_GETFILESTRIPE
) {
1489 filename
= ll_getname((const char *)arg
);
1490 if (IS_ERR(filename
))
1491 return PTR_ERR(filename
);
1493 rc
= ll_lov_getstripe_ea_info(inode
, filename
, &lmm
,
1494 &lmmsize
, &request
);
1496 rc
= ll_dir_getstripe(inode
, &lmm
, &lmmsize
, &request
);
1500 body
= req_capsule_server_get(&request
->rq_pill
,
1502 LASSERT(body
!= NULL
);
1508 if (rc
== -ENODATA
&& (cmd
== IOC_MDC_GETFILEINFO
||
1509 cmd
== LL_IOC_MDC_GETINFO
)) {
1516 if (cmd
== IOC_MDC_GETFILESTRIPE
||
1517 cmd
== LL_IOC_LOV_GETSTRIPE
) {
1518 lump
= (struct lov_user_md
*)arg
;
1520 struct lov_user_mds_data
*lmdp
;
1521 lmdp
= (struct lov_user_mds_data
*)arg
;
1522 lump
= &lmdp
->lmd_lmm
;
1524 if (copy_to_user(lump
, lmm
, lmmsize
)) {
1525 if (copy_to_user(lump
, lmm
, sizeof(*lump
))) {
1532 if (cmd
== IOC_MDC_GETFILEINFO
|| cmd
== LL_IOC_MDC_GETINFO
) {
1533 struct lov_user_mds_data
*lmdp
;
1536 st
.st_dev
= inode
->i_sb
->s_dev
;
1537 st
.st_mode
= body
->mode
;
1538 st
.st_nlink
= body
->nlink
;
1539 st
.st_uid
= body
->uid
;
1540 st
.st_gid
= body
->gid
;
1541 st
.st_rdev
= body
->rdev
;
1542 st
.st_size
= body
->size
;
1543 st
.st_blksize
= PAGE_CACHE_SIZE
;
1544 st
.st_blocks
= body
->blocks
;
1545 st
.st_atime
= body
->atime
;
1546 st
.st_mtime
= body
->mtime
;
1547 st
.st_ctime
= body
->ctime
;
1548 st
.st_ino
= inode
->i_ino
;
1550 lmdp
= (struct lov_user_mds_data
*)arg
;
1551 if (copy_to_user(&lmdp
->lmd_st
, &st
, sizeof(st
))) {
1558 ptlrpc_req_finished(request
);
1560 ll_putname(filename
);
1563 case IOC_LOV_GETINFO
: {
1564 struct lov_user_mds_data
*lumd
;
1565 struct lov_stripe_md
*lsm
;
1566 struct lov_user_md
*lum
;
1567 struct lov_mds_md
*lmm
;
1571 lumd
= (struct lov_user_mds_data
*)arg
;
1572 lum
= &lumd
->lmd_lmm
;
1574 rc
= ll_get_max_mdsize(sbi
, &lmmsize
);
1578 OBD_ALLOC_LARGE(lmm
, lmmsize
);
1581 if (copy_from_user(lmm
, lum
, lmmsize
)) {
1586 switch (lmm
->lmm_magic
) {
1587 case LOV_USER_MAGIC_V1
:
1588 if (LOV_USER_MAGIC_V1
== cpu_to_le32(LOV_USER_MAGIC_V1
))
1590 /* swab objects first so that stripes num will be sane */
1591 lustre_swab_lov_user_md_objects(
1592 ((struct lov_user_md_v1
*)lmm
)->lmm_objects
,
1593 ((struct lov_user_md_v1
*)lmm
)->lmm_stripe_count
);
1594 lustre_swab_lov_user_md_v1((struct lov_user_md_v1
*)lmm
);
1596 case LOV_USER_MAGIC_V3
:
1597 if (LOV_USER_MAGIC_V3
== cpu_to_le32(LOV_USER_MAGIC_V3
))
1599 /* swab objects first so that stripes num will be sane */
1600 lustre_swab_lov_user_md_objects(
1601 ((struct lov_user_md_v3
*)lmm
)->lmm_objects
,
1602 ((struct lov_user_md_v3
*)lmm
)->lmm_stripe_count
);
1603 lustre_swab_lov_user_md_v3((struct lov_user_md_v3
*)lmm
);
1610 rc
= obd_unpackmd(sbi
->ll_dt_exp
, &lsm
, lmm
, lmmsize
);
1616 /* Perform glimpse_size operation. */
1617 memset(&st
, 0, sizeof(st
));
1619 rc
= ll_glimpse_ioctl(sbi
, lsm
, &st
);
1623 if (copy_to_user(&lumd
->lmd_st
, &st
, sizeof(st
))) {
1629 obd_free_memmd(sbi
->ll_dt_exp
, &lsm
);
1631 OBD_FREE_LARGE(lmm
, lmmsize
);
1634 case OBD_IOC_LLOG_CATINFO
: {
1637 case OBD_IOC_QUOTACHECK
: {
1638 struct obd_quotactl
*oqctl
;
1641 if (!capable(CFS_CAP_SYS_ADMIN
) ||
1642 sbi
->ll_flags
& LL_SBI_RMT_CLIENT
)
1645 oqctl
= kzalloc(sizeof(*oqctl
), GFP_NOFS
);
1648 oqctl
->qc_type
= arg
;
1649 rc
= obd_quotacheck(sbi
->ll_md_exp
, oqctl
);
1651 CDEBUG(D_INFO
, "md_quotacheck failed: rc %d\n", rc
);
1655 rc
= obd_quotacheck(sbi
->ll_dt_exp
, oqctl
);
1657 CDEBUG(D_INFO
, "obd_quotacheck failed: rc %d\n", rc
);
1659 OBD_FREE_PTR(oqctl
);
1662 case OBD_IOC_POLL_QUOTACHECK
: {
1663 struct if_quotacheck
*check
;
1665 if (!capable(CFS_CAP_SYS_ADMIN
) ||
1666 sbi
->ll_flags
& LL_SBI_RMT_CLIENT
)
1669 check
= kzalloc(sizeof(*check
), GFP_NOFS
);
1673 rc
= obd_iocontrol(cmd
, sbi
->ll_md_exp
, 0, (void *)check
,
1676 CDEBUG(D_QUOTA
, "mdc ioctl %d failed: %d\n", cmd
, rc
);
1677 if (copy_to_user((void *)arg
, check
,
1679 CDEBUG(D_QUOTA
, "copy_to_user failed\n");
1683 rc
= obd_iocontrol(cmd
, sbi
->ll_dt_exp
, 0, (void *)check
,
1686 CDEBUG(D_QUOTA
, "osc ioctl %d failed: %d\n", cmd
, rc
);
1687 if (copy_to_user((void *)arg
, check
,
1689 CDEBUG(D_QUOTA
, "copy_to_user failed\n");
1693 OBD_FREE_PTR(check
);
1696 case LL_IOC_QUOTACTL
: {
1697 struct if_quotactl
*qctl
;
1699 qctl
= kzalloc(sizeof(*qctl
), GFP_NOFS
);
1703 if (copy_from_user(qctl
, (void *)arg
, sizeof(*qctl
))) {
1708 rc
= quotactl_ioctl(sbi
, qctl
);
1710 if (rc
== 0 && copy_to_user((void *)arg
, qctl
, sizeof(*qctl
)))
1717 case OBD_IOC_GETDTNAME
:
1718 case OBD_IOC_GETMDNAME
:
1719 return ll_get_obd_name(inode
, cmd
, arg
);
1720 case LL_IOC_FLUSHCTX
:
1721 return ll_flush_ctx(inode
);
1722 #ifdef CONFIG_FS_POSIX_ACL
1723 case LL_IOC_RMTACL
: {
1724 if (sbi
->ll_flags
& LL_SBI_RMT_CLIENT
&& is_root_inode(inode
)) {
1725 struct ll_file_data
*fd
= LUSTRE_FPRIVATE(file
);
1727 LASSERT(fd
!= NULL
);
1728 rc
= rct_add(&sbi
->ll_rct
, current_pid(), arg
);
1730 fd
->fd_flags
|= LL_FILE_RMTACL
;
1736 case LL_IOC_GETOBDCOUNT
: {
1738 struct obd_export
*exp
;
1740 if (copy_from_user(&count
, (int *)arg
, sizeof(int)))
1743 /* get ost count when count is zero, get mdt count otherwise */
1744 exp
= count
? sbi
->ll_md_exp
: sbi
->ll_dt_exp
;
1745 vallen
= sizeof(count
);
1746 rc
= obd_get_info(NULL
, exp
, sizeof(KEY_TGT_COUNT
),
1747 KEY_TGT_COUNT
, &vallen
, &count
, NULL
);
1749 CERROR("get target count failed: %d\n", rc
);
1753 if (copy_to_user((int *)arg
, &count
, sizeof(int)))
1758 case LL_IOC_PATH2FID
:
1759 if (copy_to_user((void *)arg
, ll_inode2fid(inode
),
1760 sizeof(struct lu_fid
)))
1763 case LL_IOC_GET_CONNECT_FLAGS
: {
1764 return obd_iocontrol(cmd
, sbi
->ll_md_exp
, 0, NULL
, (void *)arg
);
1766 case OBD_IOC_CHANGELOG_SEND
:
1767 case OBD_IOC_CHANGELOG_CLEAR
:
1768 rc
= copy_and_ioctl(cmd
, sbi
->ll_md_exp
, (void *)arg
,
1769 sizeof(struct ioc_changelog
));
1771 case OBD_IOC_FID2PATH
:
1772 return ll_fid2path(inode
, (void *)arg
);
1773 case LL_IOC_HSM_REQUEST
: {
1774 struct hsm_user_request
*hur
;
1777 hur
= kzalloc(sizeof(*hur
), GFP_NOFS
);
1781 /* We don't know the true size yet; copy the fixed-size part */
1782 if (copy_from_user(hur
, (void *)arg
, sizeof(*hur
))) {
1787 /* Compute the whole struct size */
1788 totalsize
= hur_len(hur
);
1793 /* Final size will be more than double totalsize */
1794 if (totalsize
>= MDS_MAXREQSIZE
/ 3)
1797 OBD_ALLOC_LARGE(hur
, totalsize
);
1801 /* Copy the whole struct */
1802 if (copy_from_user(hur
, (void *)arg
, totalsize
)) {
1803 OBD_FREE_LARGE(hur
, totalsize
);
1807 if (hur
->hur_request
.hr_action
== HUA_RELEASE
) {
1808 const struct lu_fid
*fid
;
1812 for (i
= 0; i
< hur
->hur_request
.hr_itemcount
; i
++) {
1813 fid
= &hur
->hur_user_item
[i
].hui_fid
;
1814 f
= search_inode_for_lustre(inode
->i_sb
, fid
);
1820 rc
= ll_hsm_release(f
);
1826 rc
= obd_iocontrol(cmd
, ll_i2mdexp(inode
), totalsize
,
1830 OBD_FREE_LARGE(hur
, totalsize
);
1834 case LL_IOC_HSM_PROGRESS
: {
1835 struct hsm_progress_kernel hpk
;
1836 struct hsm_progress hp
;
1838 if (copy_from_user(&hp
, (void *)arg
, sizeof(hp
)))
1841 hpk
.hpk_fid
= hp
.hp_fid
;
1842 hpk
.hpk_cookie
= hp
.hp_cookie
;
1843 hpk
.hpk_extent
= hp
.hp_extent
;
1844 hpk
.hpk_flags
= hp
.hp_flags
;
1845 hpk
.hpk_errval
= hp
.hp_errval
;
1846 hpk
.hpk_data_version
= 0;
1848 /* File may not exist in Lustre; all progress
1849 * reported to Lustre root */
1850 rc
= obd_iocontrol(cmd
, sbi
->ll_md_exp
, sizeof(hpk
), &hpk
,
1854 case LL_IOC_HSM_CT_START
:
1855 rc
= copy_and_ioctl(cmd
, sbi
->ll_md_exp
, (void *)arg
,
1856 sizeof(struct lustre_kernelcomm
));
1859 case LL_IOC_HSM_COPY_START
: {
1860 struct hsm_copy
*copy
;
1863 copy
= kzalloc(sizeof(*copy
), GFP_NOFS
);
1866 if (copy_from_user(copy
, (char *)arg
, sizeof(*copy
))) {
1871 rc
= ll_ioc_copy_start(inode
->i_sb
, copy
);
1872 if (copy_to_user((char *)arg
, copy
, sizeof(*copy
)))
1878 case LL_IOC_HSM_COPY_END
: {
1879 struct hsm_copy
*copy
;
1882 copy
= kzalloc(sizeof(*copy
), GFP_NOFS
);
1885 if (copy_from_user(copy
, (char *)arg
, sizeof(*copy
))) {
1890 rc
= ll_ioc_copy_end(inode
->i_sb
, copy
);
1891 if (copy_to_user((char *)arg
, copy
, sizeof(*copy
)))
1898 return obd_iocontrol(cmd
, sbi
->ll_dt_exp
, 0, NULL
, (void *)arg
);
1902 static loff_t
ll_dir_seek(struct file
*file
, loff_t offset
, int origin
)
1904 struct inode
*inode
= file
->f_mapping
->host
;
1905 struct ll_file_data
*fd
= LUSTRE_FPRIVATE(file
);
1906 struct ll_sb_info
*sbi
= ll_i2sbi(inode
);
1907 int api32
= ll_need_32bit_api(sbi
);
1908 loff_t ret
= -EINVAL
;
1910 mutex_lock(&inode
->i_mutex
);
1915 offset
+= file
->f_pos
;
1921 offset
+= LL_DIR_END_OFF_32BIT
;
1923 offset
+= LL_DIR_END_OFF
;
1930 ((api32
&& offset
<= LL_DIR_END_OFF_32BIT
) ||
1931 (!api32
&& offset
<= LL_DIR_END_OFF
))) {
1932 if (offset
!= file
->f_pos
) {
1933 if ((api32
&& offset
== LL_DIR_END_OFF_32BIT
) ||
1934 (!api32
&& offset
== LL_DIR_END_OFF
))
1935 fd
->lfd_pos
= MDS_DIR_END_OFF
;
1936 else if (api32
&& sbi
->ll_flags
& LL_SBI_64BIT_HASH
)
1937 fd
->lfd_pos
= offset
<< 32;
1939 fd
->lfd_pos
= offset
;
1940 file
->f_pos
= offset
;
1941 file
->f_version
= 0;
1948 mutex_unlock(&inode
->i_mutex
);
1952 static int ll_dir_open(struct inode
*inode
, struct file
*file
)
1954 return ll_file_open(inode
, file
);
1957 static int ll_dir_release(struct inode
*inode
, struct file
*file
)
1959 return ll_file_release(inode
, file
);
1962 const struct file_operations ll_dir_operations
= {
1963 .llseek
= ll_dir_seek
,
1964 .open
= ll_dir_open
,
1965 .release
= ll_dir_release
,
1966 .read
= generic_read_dir
,
1967 .iterate
= ll_readdir
,
1968 .unlocked_ioctl
= ll_dir_ioctl
,