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) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2015, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/llite/llite_lib.c
38 * Lustre Light Super operations
41 #define DEBUG_SUBSYSTEM S_LLITE
43 #include <linux/module.h>
44 #include <linux/statfs.h>
45 #include <linux/types.h>
46 #include <linux/version.h>
48 #include <linux/user_namespace.h>
49 #ifdef HAVE_UIDGID_HEADER
50 # include <linux/uidgid.h>
53 #include <lustre_ioctl.h>
54 #include <lustre_ha.h>
55 #include <lustre_dlm.h>
56 #include <lprocfs_status.h>
57 #include <lustre_disk.h>
58 #include <lustre_param.h>
59 #include <lustre_log.h>
60 #include <cl_object.h>
61 #include <obd_cksum.h>
62 #include "llite_internal.h"
64 struct kmem_cache *ll_file_data_slab;
67 #define log2(n) ffz(~(n))
70 static struct ll_sb_info *ll_init_sbi(void)
72 struct ll_sb_info *sbi = NULL;
74 unsigned long lru_page_max;
84 spin_lock_init(&sbi->ll_lock);
85 mutex_init(&sbi->ll_lco.lco_lock);
86 spin_lock_init(&sbi->ll_pp_extent_lock);
87 spin_lock_init(&sbi->ll_process_lock);
88 sbi->ll_rw_stats_on = 0;
91 pages = si.totalram - si.totalhigh;
92 lru_page_max = pages / 2;
94 /* initialize ll_cache data */
95 sbi->ll_cache = cl_cache_init(lru_page_max);
96 if (sbi->ll_cache == NULL) {
97 OBD_FREE(sbi, sizeof(*sbi));
101 sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
102 SBI_DEFAULT_READAHEAD_MAX);
103 sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
104 sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
105 SBI_DEFAULT_READAHEAD_WHOLE_MAX;
106 INIT_LIST_HEAD(&sbi->ll_conn_chain);
107 INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list);
109 ll_generate_random_uuid(uuid);
110 class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
111 CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
113 sbi->ll_flags |= LL_SBI_VERBOSE;
114 #ifdef ENABLE_CHECKSUM
115 sbi->ll_flags |= LL_SBI_CHECKSUM;
118 #ifdef HAVE_LRU_RESIZE_SUPPORT
119 sbi->ll_flags |= LL_SBI_LRU_RESIZE;
122 for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
123 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
125 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
129 /* metadata statahead is enabled by default */
130 sbi->ll_sa_max = LL_SA_RPC_DEF;
131 atomic_set(&sbi->ll_sa_total, 0);
132 atomic_set(&sbi->ll_sa_wrong, 0);
133 atomic_set(&sbi->ll_sa_running, 0);
134 atomic_set(&sbi->ll_agl_total, 0);
135 sbi->ll_flags |= LL_SBI_AGL_ENABLED;
138 sbi->ll_squash.rsi_uid = 0;
139 sbi->ll_squash.rsi_gid = 0;
140 INIT_LIST_HEAD(&sbi->ll_squash.rsi_nosquash_nids);
141 init_rwsem(&sbi->ll_squash.rsi_sem);
146 static void ll_free_sbi(struct super_block *sb)
148 struct ll_sb_info *sbi = ll_s2sbi(sb);
152 if (!list_empty(&sbi->ll_squash.rsi_nosquash_nids))
153 cfs_free_nidlist(&sbi->ll_squash.rsi_nosquash_nids);
154 if (sbi->ll_cache != NULL) {
155 cl_cache_decref(sbi->ll_cache);
156 sbi->ll_cache = NULL;
158 OBD_FREE(sbi, sizeof(*sbi));
163 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
164 struct vfsmount *mnt)
166 struct inode *root = NULL;
167 struct ll_sb_info *sbi = ll_s2sbi(sb);
168 struct obd_device *obd;
169 struct obd_statfs *osfs = NULL;
170 struct ptlrpc_request *request = NULL;
171 struct obd_connect_data *data = NULL;
172 struct obd_uuid *uuid;
173 struct md_op_data *op_data;
174 struct lustre_md lmd;
176 int size, err, checksum;
179 obd = class_name2obd(md);
181 CERROR("MD %s: not setup or attached\n", md);
195 /* indicate the features supported by this client */
196 data->ocd_connect_flags = OBD_CONNECT_IBITS | OBD_CONNECT_NODEVOH |
197 OBD_CONNECT_ATTRFID |
198 OBD_CONNECT_VERSION | OBD_CONNECT_BRW_SIZE |
199 OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
200 OBD_CONNECT_CANCELSET | OBD_CONNECT_FID |
201 OBD_CONNECT_AT | OBD_CONNECT_LOV_V3 |
202 OBD_CONNECT_RMT_CLIENT | OBD_CONNECT_VBR |
203 OBD_CONNECT_FULL20 | OBD_CONNECT_64BITHASH|
204 OBD_CONNECT_EINPROGRESS |
205 OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
206 OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS |
207 OBD_CONNECT_MAX_EASIZE |
208 OBD_CONNECT_FLOCK_DEAD |
209 OBD_CONNECT_DISP_STRIPE | OBD_CONNECT_LFSCK |
210 OBD_CONNECT_OPEN_BY_FID |
211 OBD_CONNECT_DIR_STRIPE |
212 OBD_CONNECT_BULK_MBITS |
215 #ifdef HAVE_LRU_RESIZE_SUPPORT
216 if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
217 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
219 #ifdef CONFIG_FS_POSIX_ACL
220 data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK;
223 if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
224 /* flag mdc connection as lightweight, only used for test
225 * purpose, use with care */
226 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
228 data->ocd_ibits_known = MDS_INODELOCK_FULL;
229 data->ocd_version = LUSTRE_VERSION_CODE;
231 if (sb->s_flags & MS_RDONLY)
232 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
233 if (sbi->ll_flags & LL_SBI_USER_XATTR)
234 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
236 #ifdef HAVE_MS_FLOCK_LOCK
237 /* force vfs to use lustre handler for flock() calls - bug 10743 */
238 sb->s_flags |= MS_FLOCK_LOCK;
240 #ifdef MS_HAS_NEW_AOPS
241 sb->s_flags |= MS_HAS_NEW_AOPS;
244 if (sbi->ll_flags & LL_SBI_FLOCK)
245 sbi->ll_fop = &ll_file_operations_flock;
246 else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
247 sbi->ll_fop = &ll_file_operations;
249 sbi->ll_fop = &ll_file_operations_noflock;
252 data->ocd_connect_flags |= OBD_CONNECT_REAL;
253 if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
254 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
256 /* always ping even if server suppress_pings */
257 if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
258 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
260 data->ocd_brw_size = MD_MAX_BRW_SIZE;
262 err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid, data, NULL);
264 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
265 "recovery, of which this client is not a "
266 "part. Please wait for recovery to complete,"
267 " abort, or time out.\n", md);
270 CERROR("cannot connect to %s: rc = %d\n", md, err);
274 sbi->ll_md_exp->exp_connect_data = *data;
276 err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
277 LUSTRE_SEQ_METADATA);
279 CERROR("%s: Can't init metadata layer FID infrastructure, "
280 "rc = %d\n", sbi->ll_md_exp->exp_obd->obd_name, err);
284 /* For mount, we only need fs info from MDT0, and also in DNE, it
285 * can make sure the client can be mounted as long as MDT0 is
287 err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
288 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
289 OBD_STATFS_FOR_MDT0);
291 GOTO(out_md_fid, err);
293 /* This needs to be after statfs to ensure connect has finished.
294 * Note that "data" does NOT contain the valid connect reply.
295 * If connecting to a 1.8 server there will be no LMV device, so
296 * we can access the MDC export directly and exp_connect_flags will
297 * be non-zero, but if accessing an upgraded 2.1 server it will
298 * have the correct flags filled in.
299 * XXX: fill in the LMV exp_connect_flags from MDC(s). */
300 valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
301 if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
302 valid != CLIENT_CONNECT_MDT_REQD) {
305 OBD_ALLOC_WAIT(buf, PAGE_CACHE_SIZE);
306 obd_connect_flags2str(buf, PAGE_CACHE_SIZE,
307 valid ^ CLIENT_CONNECT_MDT_REQD, ",");
308 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
309 "feature(s) needed for correct operation "
310 "of this client (%s). Please upgrade "
311 "server or downgrade client.\n",
312 sbi->ll_md_exp->exp_obd->obd_name, buf);
313 OBD_FREE(buf, PAGE_CACHE_SIZE);
314 GOTO(out_md_fid, err = -EPROTO);
317 size = sizeof(*data);
318 err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
319 KEY_CONN_DATA, &size, data);
321 CERROR("%s: Get connect data failed: rc = %d\n",
322 sbi->ll_md_exp->exp_obd->obd_name, err);
323 GOTO(out_md_fid, err);
326 LASSERT(osfs->os_bsize);
327 sb->s_blocksize = osfs->os_bsize;
328 sb->s_blocksize_bits = log2(osfs->os_bsize);
329 sb->s_magic = LL_SUPER_MAGIC;
330 sb->s_maxbytes = MAX_LFS_FILESIZE;
331 sbi->ll_namelen = osfs->os_namelen;
333 if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
334 !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
335 LCONSOLE_INFO("Disabling user_xattr feature because "
336 "it is not supported on the server\n");
337 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
340 if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
342 sb->s_flags |= MS_POSIXACL;
344 sbi->ll_flags |= LL_SBI_ACL;
346 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
348 sb->s_flags &= ~MS_POSIXACL;
350 sbi->ll_flags &= ~LL_SBI_ACL;
353 if (data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) {
354 if (!(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
355 sbi->ll_flags |= LL_SBI_RMT_CLIENT;
356 LCONSOLE_INFO("client is set as remote by default.\n");
359 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
360 sbi->ll_flags &= ~LL_SBI_RMT_CLIENT;
361 LCONSOLE_INFO("client claims to be remote, but server "
362 "rejected, forced to be local.\n");
366 if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
367 sbi->ll_flags |= LL_SBI_64BIT_HASH;
369 if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE)
370 sbi->ll_md_brw_pages = data->ocd_brw_size >> PAGE_CACHE_SHIFT;
372 sbi->ll_md_brw_pages = 1;
374 if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK)
375 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
377 if (data->ocd_ibits_known & MDS_INODELOCK_XATTR) {
378 if (!(data->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)) {
379 LCONSOLE_INFO("%s: disabling xattr cache due to "
380 "unknown maximum xattr size.\n", dt);
382 sbi->ll_flags |= LL_SBI_XATTR_CACHE;
383 sbi->ll_xattr_cache_enabled = 1;
387 obd = class_name2obd(dt);
389 CERROR("DT %s: not setup or attached\n", dt);
390 GOTO(out_md_fid, err = -ENODEV);
393 /* pass client page size via ocd_grant_blkbits, the server should report
394 * back its backend blocksize for grant calculation purpose */
395 data->ocd_grant_blkbits = PAGE_SHIFT;
397 data->ocd_connect_flags = OBD_CONNECT_GRANT | OBD_CONNECT_VERSION |
398 OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
399 OBD_CONNECT_CANCELSET | OBD_CONNECT_FID |
400 OBD_CONNECT_SRVLOCK | OBD_CONNECT_TRUNCLOCK|
401 OBD_CONNECT_AT | OBD_CONNECT_RMT_CLIENT |
402 OBD_CONNECT_OSS_CAPA | OBD_CONNECT_VBR|
403 OBD_CONNECT_FULL20 | OBD_CONNECT_64BITHASH |
404 OBD_CONNECT_MAXBYTES |
405 OBD_CONNECT_EINPROGRESS |
406 OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
407 OBD_CONNECT_LAYOUTLOCK |
408 OBD_CONNECT_PINGLESS | OBD_CONNECT_LFSCK |
409 OBD_CONNECT_BULK_MBITS;
411 if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_GRANT_PARAM))
412 data->ocd_connect_flags |= OBD_CONNECT_GRANT_PARAM;
414 if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_CKSUM)) {
415 /* OBD_CONNECT_CKSUM should always be set, even if checksums are
416 * disabled by default, because it can still be enabled on the
417 * fly via /proc. As a consequence, we still need to come to an
418 * agreement on the supported algorithms at connect time */
419 data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
421 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
422 data->ocd_cksum_types = OBD_CKSUM_ADLER;
424 data->ocd_cksum_types = cksum_types_supported_client();
427 #ifdef HAVE_LRU_RESIZE_SUPPORT
428 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
430 if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
431 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
433 /* always ping even if server suppress_pings */
434 if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
435 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
437 CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d "
438 "ocd_grant: %d\n", data->ocd_connect_flags,
439 data->ocd_version, data->ocd_grant);
441 obd->obd_upcall.onu_owner = &sbi->ll_lco;
442 obd->obd_upcall.onu_upcall = cl_ocd_update;
444 data->ocd_brw_size = DT_MAX_BRW_SIZE;
446 err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data,
449 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
450 "recovery, of which this client is not a "
451 "part. Please wait for recovery to "
452 "complete, abort, or time out.\n", dt);
455 CERROR("%s: Cannot connect to %s: rc = %d\n",
456 sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
460 sbi->ll_dt_exp->exp_connect_data = *data;
462 err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
463 LUSTRE_SEQ_METADATA);
465 CERROR("%s: Can't init data layer FID infrastructure, "
466 "rc = %d\n", sbi->ll_dt_exp->exp_obd->obd_name, err);
470 mutex_lock(&sbi->ll_lco.lco_lock);
471 sbi->ll_lco.lco_flags = data->ocd_connect_flags;
472 sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
473 sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
474 mutex_unlock(&sbi->ll_lco.lco_lock);
476 fid_zero(&sbi->ll_root_fid);
477 err = md_get_root(sbi->ll_md_exp, get_mount_fileset(sb),
480 CERROR("cannot mds_connect: rc = %d\n", err);
481 GOTO(out_lock_cn_cb, err);
483 if (!fid_is_sane(&sbi->ll_root_fid)) {
484 CERROR("%s: Invalid root fid "DFID" during mount\n",
485 sbi->ll_md_exp->exp_obd->obd_name,
486 PFID(&sbi->ll_root_fid));
487 GOTO(out_lock_cn_cb, err = -EINVAL);
489 CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
491 sb->s_op = &lustre_super_operations;
492 #if THREAD_SIZE >= 8192 /*b=17630*/
493 sb->s_export_op = &lustre_export_operations;
497 * XXX: move this to after cbd setup? */
498 valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMODEASIZE;
499 if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
500 valid |= OBD_MD_FLRMTPERM;
501 else if (sbi->ll_flags & LL_SBI_ACL)
502 valid |= OBD_MD_FLACL;
504 OBD_ALLOC_PTR(op_data);
506 GOTO(out_lock_cn_cb, err = -ENOMEM);
508 op_data->op_fid1 = sbi->ll_root_fid;
509 op_data->op_mode = 0;
510 op_data->op_valid = valid;
512 err = md_getattr(sbi->ll_md_exp, op_data, &request);
514 OBD_FREE_PTR(op_data);
516 CERROR("%s: md_getattr failed for root: rc = %d\n",
517 sbi->ll_md_exp->exp_obd->obd_name, err);
518 GOTO(out_lock_cn_cb, err);
521 err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
522 sbi->ll_md_exp, &lmd);
524 CERROR("failed to understand root inode md: rc = %d\n", err);
525 ptlrpc_req_finished(request);
526 GOTO(out_lock_cn_cb, err);
529 LASSERT(fid_is_sane(&sbi->ll_root_fid));
530 root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
531 sbi->ll_flags & LL_SBI_32BIT_API),
533 md_free_lustre_md(sbi->ll_md_exp, &lmd);
534 ptlrpc_req_finished(request);
537 #ifdef CONFIG_FS_POSIX_ACL
539 posix_acl_release(lmd.posix_acl);
540 lmd.posix_acl = NULL;
543 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
545 CERROR("lustre_lite: bad iget4 for root\n");
549 #ifdef CONFIG_FS_POSIX_ACL
550 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
551 rct_init(&sbi->ll_rct);
552 et_init(&sbi->ll_et);
556 checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
557 err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
558 KEY_CHECKSUM, sizeof(checksum), &checksum,
562 err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CACHE_SET),
563 KEY_CACHE_SET, sizeof(*sbi->ll_cache),
564 sbi->ll_cache, NULL);
566 sb->s_root = d_make_root(root);
567 if (sb->s_root == NULL) {
568 CERROR("%s: can't make root dentry\n",
569 ll_get_fsname(sb, NULL, 0));
570 GOTO(out_root, err = -ENOMEM);
572 #ifdef HAVE_DCACHE_LOCK
573 sb->s_root->d_op = &ll_d_ops;
576 sbi->ll_sdev_orig = sb->s_dev;
578 /* We set sb->s_dev equal on all lustre clients in order to support
579 * NFS export clustering. NFSD requires that the FSID be the same
581 /* s_dev is also used in lt_compare() to compare two fs, but that is
582 * only a node-local comparison. */
583 uuid = obd_get_uuid(sbi->ll_md_exp);
585 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
591 if (proc_lustre_fs_root != NULL) {
592 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
595 CERROR("%s: could not register mount in lprocfs: "
596 "rc = %d\n", ll_get_fsname(sb, NULL, 0), err);
606 obd_fid_fini(sbi->ll_dt_exp->exp_obd);
608 obd_disconnect(sbi->ll_dt_exp);
609 sbi->ll_dt_exp = NULL;
611 obd_fid_fini(sbi->ll_md_exp->exp_obd);
613 obd_disconnect(sbi->ll_md_exp);
614 sbi->ll_md_exp = NULL;
623 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
627 size = sizeof(*lmmsize);
628 rc = obd_get_info(NULL, sbi->ll_dt_exp, sizeof(KEY_MAX_EASIZE),
629 KEY_MAX_EASIZE, &size, lmmsize);
631 CERROR("%s: cannot get max LOV EA size: rc = %d\n",
632 sbi->ll_dt_exp->exp_obd->obd_name, rc);
637 rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
638 KEY_MAX_EASIZE, &size, lmmsize);
640 CERROR("Get max mdsize error rc %d\n", rc);
646 * Get the value of the default_easize parameter.
648 * \see client_obd::cl_default_mds_easize
650 * \param[in] sbi superblock info for this filesystem
651 * \param[out] lmmsize pointer to storage location for value
653 * \retval 0 on success
654 * \retval negative negated errno on failure
656 int ll_get_default_mdsize(struct ll_sb_info *sbi, int *lmmsize)
661 rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_DEFAULT_EASIZE),
662 KEY_DEFAULT_EASIZE, &size, lmmsize);
664 CERROR("Get default mdsize error rc %d\n", rc);
670 * Set the default_easize parameter to the given value.
672 * \see client_obd::cl_default_mds_easize
674 * \param[in] sbi superblock info for this filesystem
675 * \param[in] lmmsize the size to set
677 * \retval 0 on success
678 * \retval negative negated errno on failure
680 int ll_set_default_mdsize(struct ll_sb_info *sbi, int lmmsize)
684 if (lmmsize < sizeof(struct lov_mds_md) ||
685 lmmsize > OBD_MAX_DEFAULT_EA_SIZE)
688 rc = obd_set_info_async(NULL, sbi->ll_md_exp,
689 sizeof(KEY_DEFAULT_EASIZE), KEY_DEFAULT_EASIZE,
690 sizeof(int), &lmmsize, NULL);
695 static void ll_dump_inode(struct inode *inode)
697 struct ll_d_hlist_node *tmp;
698 int dentry_count = 0;
700 LASSERT(inode != NULL);
702 ll_d_hlist_for_each(tmp, &inode->i_dentry)
705 CERROR("%s: inode %p dump: dev=%s fid="DFID
706 " mode=%o count=%u, %d dentries\n",
707 ll_get_fsname(inode->i_sb, NULL, 0), inode,
708 ll_i2mdexp(inode)->exp_obd->obd_name, PFID(ll_inode2fid(inode)),
709 inode->i_mode, atomic_read(&inode->i_count), dentry_count);
712 void lustre_dump_dentry(struct dentry *dentry, int recur)
714 struct list_head *tmp;
717 LASSERT(dentry != NULL);
719 list_for_each(tmp, &dentry->d_subdirs)
722 CERROR("dentry %p dump: name=%.*s parent=%.*s (%p), inode=%p, count=%u,"
723 " flags=0x%x, fsdata=%p, %d subdirs\n", dentry,
724 dentry->d_name.len, dentry->d_name.name,
725 dentry->d_parent->d_name.len, dentry->d_parent->d_name.name,
726 dentry->d_parent, dentry->d_inode, ll_d_count(dentry),
727 dentry->d_flags, dentry->d_fsdata, subdirs);
728 if (dentry->d_inode != NULL)
729 ll_dump_inode(dentry->d_inode);
734 list_for_each(tmp, &dentry->d_subdirs) {
735 struct dentry *d = list_entry(tmp, struct dentry, d_child);
736 lustre_dump_dentry(d, recur - 1);
740 static void client_common_put_super(struct super_block *sb)
742 struct ll_sb_info *sbi = ll_s2sbi(sb);
745 #ifdef CONFIG_FS_POSIX_ACL
746 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
747 et_fini(&sbi->ll_et);
748 rct_fini(&sbi->ll_rct);
754 list_del(&sbi->ll_conn_chain);
756 obd_fid_fini(sbi->ll_dt_exp->exp_obd);
757 obd_disconnect(sbi->ll_dt_exp);
758 sbi->ll_dt_exp = NULL;
760 lprocfs_unregister_mountpoint(sbi);
762 obd_fid_fini(sbi->ll_md_exp->exp_obd);
763 obd_disconnect(sbi->ll_md_exp);
764 sbi->ll_md_exp = NULL;
769 void ll_kill_super(struct super_block *sb)
771 struct ll_sb_info *sbi;
775 if (!(sb->s_flags & MS_ACTIVE))
779 /* we need restore s_dev from changed for clustred NFS before put_super
780 * because new kernels have cached s_dev and change sb->s_dev in
781 * put_super not affected real removing devices */
783 sb->s_dev = sbi->ll_sdev_orig;
784 sbi->ll_umounting = 1;
786 /* wait running statahead threads to quit */
787 while (atomic_read(&sbi->ll_sa_running) > 0) {
788 set_current_state(TASK_UNINTERRUPTIBLE);
789 schedule_timeout(msecs_to_jiffies(MSEC_PER_SEC >> 3));
796 static inline int ll_set_opt(const char *opt, char *data, int fl)
798 if (strncmp(opt, data, strlen(opt)) != 0)
804 /* non-client-specific mount options are parsed in lmd_parse */
805 static int ll_options(char *options, int *flags)
808 char *s1 = options, *s2;
814 CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
817 CDEBUG(D_SUPER, "next opt=%s\n", s1);
818 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
823 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
828 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
833 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
838 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
843 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
848 tmp = ll_set_opt("context", s1, 1);
851 tmp = ll_set_opt("fscontext", s1, 1);
854 tmp = ll_set_opt("defcontext", s1, 1);
857 tmp = ll_set_opt("rootcontext", s1, 1);
860 tmp = ll_set_opt("remote_client", s1, LL_SBI_RMT_CLIENT);
865 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
870 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
876 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
881 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
886 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
891 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
896 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
901 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
906 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
911 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
916 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
921 tmp = ll_set_opt("always_ping", s1, LL_SBI_ALWAYS_PING);
926 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
932 s2 = strchr(s1, ',');
940 void ll_lli_init(struct ll_inode_info *lli)
942 lli->lli_inode_magic = LLI_INODE_MAGIC;
944 spin_lock_init(&lli->lli_lock);
945 lli->lli_posix_acl = NULL;
946 lli->lli_remote_perms = NULL;
947 mutex_init(&lli->lli_rmtperm_mutex);
948 /* Do not set lli_fid, it has been initialized already. */
949 fid_zero(&lli->lli_pfid);
950 atomic_set(&lli->lli_open_count, 0);
951 lli->lli_rmtperm_time = 0;
952 lli->lli_mds_read_och = NULL;
953 lli->lli_mds_write_och = NULL;
954 lli->lli_mds_exec_och = NULL;
955 lli->lli_open_fd_read_count = 0;
956 lli->lli_open_fd_write_count = 0;
957 lli->lli_open_fd_exec_count = 0;
958 mutex_init(&lli->lli_och_mutex);
959 spin_lock_init(&lli->lli_agl_lock);
960 spin_lock_init(&lli->lli_layout_lock);
961 ll_layout_version_set(lli, CL_LAYOUT_GEN_NONE);
962 lli->lli_clob = NULL;
964 init_rwsem(&lli->lli_xattrs_list_rwsem);
965 mutex_init(&lli->lli_xattrs_enq_lock);
967 LASSERT(lli->lli_vfs_inode.i_mode != 0);
968 if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
969 mutex_init(&lli->lli_readdir_mutex);
970 lli->lli_opendir_key = NULL;
972 spin_lock_init(&lli->lli_sa_lock);
973 lli->lli_opendir_pid = 0;
974 lli->lli_sa_enabled = 0;
975 lli->lli_def_stripe_offset = -1;
977 mutex_init(&lli->lli_size_mutex);
978 lli->lli_symlink_name = NULL;
979 init_rwsem(&lli->lli_trunc_sem);
980 range_lock_tree_init(&lli->lli_write_tree);
981 init_rwsem(&lli->lli_glimpse_sem);
982 lli->lli_glimpse_time = 0;
983 INIT_LIST_HEAD(&lli->lli_agl_list);
984 lli->lli_agl_index = 0;
985 lli->lli_async_rc = 0;
987 mutex_init(&lli->lli_layout_mutex);
990 static inline int ll_bdi_register(struct backing_dev_info *bdi)
992 static atomic_t ll_bdi_num = ATOMIC_INIT(0);
994 bdi->name = "lustre";
995 return bdi_register(bdi, NULL, "lustre-%d",
996 atomic_inc_return(&ll_bdi_num));
999 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
1001 struct lustre_profile *lprof = NULL;
1002 struct lustre_sb_info *lsi = s2lsi(sb);
1003 struct ll_sb_info *sbi;
1004 char *dt = NULL, *md = NULL;
1005 char *profilenm = get_profile_name(sb);
1006 struct config_llog_instance *cfg;
1007 /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
1008 const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
1012 CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
1018 try_module_get(THIS_MODULE);
1020 /* client additional sb info */
1021 lsi->lsi_llsbi = sbi = ll_init_sbi();
1023 module_put(THIS_MODULE);
1028 err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
1030 GOTO(out_free, err);
1032 err = bdi_init(&lsi->lsi_bdi);
1034 GOTO(out_free, err);
1035 lsi->lsi_flags |= LSI_BDI_INITIALIZED;
1036 #ifdef HAVE_BDI_CAP_MAP_COPY
1037 lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
1039 lsi->lsi_bdi.capabilities = 0;
1041 err = ll_bdi_register(&lsi->lsi_bdi);
1043 GOTO(out_free, err);
1045 sb->s_bdi = &lsi->lsi_bdi;
1046 #ifndef HAVE_DCACHE_LOCK
1047 /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
1048 sb->s_d_op = &ll_d_ops;
1051 /* Generate a string unique to this super, in case some joker tries
1052 to mount the same fs at two mount points.
1053 Use the address of the super itself.*/
1054 cfg->cfg_instance = sb;
1055 cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
1056 cfg->cfg_callback = class_config_llog_handler;
1057 /* set up client obds */
1058 err = lustre_process_log(sb, profilenm, cfg);
1060 GOTO(out_free, err);
1062 /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1063 lprof = class_get_profile(profilenm);
1064 if (lprof == NULL) {
1065 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1066 " read from the MGS. Does that filesystem "
1067 "exist?\n", profilenm);
1068 GOTO(out_free, err = -EINVAL);
1070 CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1071 lprof->lp_md, lprof->lp_dt);
1073 OBD_ALLOC(dt, strlen(lprof->lp_dt) + instlen + 2);
1075 GOTO(out_free, err = -ENOMEM);
1076 sprintf(dt, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
1078 OBD_ALLOC(md, strlen(lprof->lp_md) + instlen + 2);
1080 GOTO(out_free, err = -ENOMEM);
1081 sprintf(md, "%s-%p", lprof->lp_md, cfg->cfg_instance);
1083 /* connections, registrations, sb setup */
1084 err = client_common_fill_super(sb, md, dt, mnt);
1086 GOTO(out_free, err);
1088 sbi->ll_client_common_fill_super_succeeded = 1;
1092 OBD_FREE(md, strlen(lprof->lp_md) + instlen + 2);
1094 OBD_FREE(dt, strlen(lprof->lp_dt) + instlen + 2);
1096 class_put_profile(lprof);
1099 else if (sbi->ll_flags & LL_SBI_VERBOSE)
1100 LCONSOLE_WARN("Mounted %s\n", profilenm);
1104 } /* ll_fill_super */
1106 void ll_put_super(struct super_block *sb)
1108 struct config_llog_instance cfg, params_cfg;
1109 struct obd_device *obd;
1110 struct lustre_sb_info *lsi = s2lsi(sb);
1111 struct ll_sb_info *sbi = ll_s2sbi(sb);
1112 char *profilenm = get_profile_name(sb);
1114 int next, force = 1, rc = 0;
1117 CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1119 cfg.cfg_instance = sb;
1120 lustre_end_log(sb, profilenm, &cfg);
1122 params_cfg.cfg_instance = sb;
1123 lustre_end_log(sb, PARAMS_FILENAME, ¶ms_cfg);
1125 if (sbi->ll_md_exp) {
1126 obd = class_exp2obd(sbi->ll_md_exp);
1128 force = obd->obd_force;
1131 /* Wait for unstable pages to be committed to stable storage */
1133 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
1134 rc = l_wait_event(sbi->ll_cache->ccc_unstable_waitq,
1135 atomic_long_read(&sbi->ll_cache->ccc_unstable_nr) == 0,
1139 ccc_count = atomic_long_read(&sbi->ll_cache->ccc_unstable_nr);
1140 if (force == 0 && rc != -EINTR)
1141 LASSERTF(ccc_count == 0, "count: %li\n", ccc_count);
1144 /* We need to set force before the lov_disconnect in
1145 lustre_common_put_super, since l_d cleans up osc's as well. */
1148 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1150 obd->obd_force = force;
1154 if (sbi->ll_client_common_fill_super_succeeded) {
1155 /* Only if client_common_fill_super succeeded */
1156 client_common_put_super(sb);
1160 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1161 class_manual_cleanup(obd);
1164 if (sbi->ll_flags & LL_SBI_VERBOSE)
1165 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1168 class_del_profile(profilenm);
1170 if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1171 bdi_destroy(&lsi->lsi_bdi);
1172 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1176 lsi->lsi_llsbi = NULL;
1178 lustre_common_put_super(sb);
1180 cl_env_cache_purge(~0);
1182 module_put(THIS_MODULE);
1185 } /* client_put_super */
1187 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1189 struct inode *inode = NULL;
1191 /* NOTE: we depend on atomic igrab() -bzzz */
1192 lock_res_and_lock(lock);
1193 if (lock->l_resource->lr_lvb_inode) {
1194 struct ll_inode_info * lli;
1195 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1196 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1197 inode = igrab(lock->l_resource->lr_lvb_inode);
1199 inode = lock->l_resource->lr_lvb_inode;
1200 LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ? D_INFO :
1201 D_WARNING, lock, "lr_lvb_inode %p is "
1202 "bogus: magic %08x",
1203 lock->l_resource->lr_lvb_inode,
1204 lli->lli_inode_magic);
1208 unlock_res_and_lock(lock);
1212 void ll_dir_clear_lsm_md(struct inode *inode)
1214 struct ll_inode_info *lli = ll_i2info(inode);
1216 LASSERT(S_ISDIR(inode->i_mode));
1218 if (lli->lli_lsm_md != NULL) {
1219 lmv_free_memmd(lli->lli_lsm_md);
1220 lli->lli_lsm_md = NULL;
1224 static struct inode *ll_iget_anon_dir(struct super_block *sb,
1225 const struct lu_fid *fid,
1226 struct lustre_md *md)
1228 struct ll_sb_info *sbi = ll_s2sbi(sb);
1229 struct mdt_body *body = md->body;
1230 struct inode *inode;
1234 ino = cl_fid_build_ino(fid, sbi->ll_flags & LL_SBI_32BIT_API);
1235 inode = iget_locked(sb, ino);
1236 if (inode == NULL) {
1237 CERROR("%s: failed get simple inode "DFID": rc = -ENOENT\n",
1238 ll_get_fsname(sb, NULL, 0), PFID(fid));
1239 RETURN(ERR_PTR(-ENOENT));
1242 if (inode->i_state & I_NEW) {
1243 struct ll_inode_info *lli = ll_i2info(inode);
1244 struct lmv_stripe_md *lsm = md->lmv;
1246 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1247 (body->mbo_mode & S_IFMT);
1248 LASSERTF(S_ISDIR(inode->i_mode), "Not slave inode "DFID"\n",
1251 LTIME_S(inode->i_mtime) = 0;
1252 LTIME_S(inode->i_atime) = 0;
1253 LTIME_S(inode->i_ctime) = 0;
1256 #ifdef HAVE_BACKING_DEV_INFO
1257 /* initializing backing dev info. */
1258 inode->i_mapping->backing_dev_info =
1259 &s2lsi(inode->i_sb)->lsi_bdi;
1261 inode->i_op = &ll_dir_inode_operations;
1262 inode->i_fop = &ll_dir_operations;
1263 lli->lli_fid = *fid;
1266 LASSERT(lsm != NULL);
1267 /* master object FID */
1268 lli->lli_pfid = body->mbo_fid1;
1269 CDEBUG(D_INODE, "lli %p slave "DFID" master "DFID"\n",
1270 lli, PFID(fid), PFID(&lli->lli_pfid));
1271 unlock_new_inode(inode);
1277 static int ll_init_lsm_md(struct inode *inode, struct lustre_md *md)
1280 struct lmv_stripe_md *lsm = md->lmv;
1283 LASSERT(lsm != NULL);
1284 /* XXX sigh, this lsm_root initialization should be in
1285 * LMV layer, but it needs ll_iget right now, so we
1286 * put this here right now. */
1287 for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
1288 fid = &lsm->lsm_md_oinfo[i].lmo_fid;
1289 LASSERT(lsm->lsm_md_oinfo[i].lmo_root == NULL);
1290 /* Unfortunately ll_iget will call ll_update_inode,
1291 * where the initialization of slave inode is slightly
1292 * different, so it reset lsm_md to NULL to avoid
1293 * initializing lsm for slave inode. */
1294 /* For migrating inode, master stripe and master object will
1295 * be same, so we only need assign this inode */
1296 if (lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION && i == 0)
1297 lsm->lsm_md_oinfo[i].lmo_root = inode;
1299 lsm->lsm_md_oinfo[i].lmo_root =
1300 ll_iget_anon_dir(inode->i_sb, fid, md);
1302 if (IS_ERR(lsm->lsm_md_oinfo[i].lmo_root)) {
1303 int rc = PTR_ERR(lsm->lsm_md_oinfo[i].lmo_root);
1305 lsm->lsm_md_oinfo[i].lmo_root = NULL;
1313 static inline int lli_lsm_md_eq(const struct lmv_stripe_md *lsm_md1,
1314 const struct lmv_stripe_md *lsm_md2)
1316 return lsm_md1->lsm_md_magic == lsm_md2->lsm_md_magic &&
1317 lsm_md1->lsm_md_stripe_count == lsm_md2->lsm_md_stripe_count &&
1318 lsm_md1->lsm_md_master_mdt_index ==
1319 lsm_md2->lsm_md_master_mdt_index &&
1320 lsm_md1->lsm_md_hash_type == lsm_md2->lsm_md_hash_type &&
1321 lsm_md1->lsm_md_layout_version ==
1322 lsm_md2->lsm_md_layout_version &&
1323 strcmp(lsm_md1->lsm_md_pool_name,
1324 lsm_md2->lsm_md_pool_name) == 0;
1327 static int ll_update_lsm_md(struct inode *inode, struct lustre_md *md)
1329 struct ll_inode_info *lli = ll_i2info(inode);
1330 struct lmv_stripe_md *lsm = md->lmv;
1334 LASSERT(S_ISDIR(inode->i_mode));
1335 CDEBUG(D_INODE, "update lsm %p of "DFID"\n", lli->lli_lsm_md,
1336 PFID(ll_inode2fid(inode)));
1338 /* no striped information from request. */
1340 if (lli->lli_lsm_md == NULL) {
1342 } else if (lli->lli_lsm_md->lsm_md_hash_type &
1343 LMV_HASH_FLAG_MIGRATION) {
1344 /* migration is done, the temporay MIGRATE layout has
1346 CDEBUG(D_INODE, DFID" finish migration.\n",
1347 PFID(ll_inode2fid(inode)));
1348 lmv_free_memmd(lli->lli_lsm_md);
1349 lli->lli_lsm_md = NULL;
1352 /* The lustre_md from req does not include stripeEA,
1353 * see ll_md_setattr */
1358 /* set the directory layout */
1359 if (lli->lli_lsm_md == NULL) {
1360 struct cl_attr *attr;
1362 rc = ll_init_lsm_md(inode, md);
1366 /* set md->lmv to NULL, so the following free lustre_md
1367 * will not free this lsm */
1369 lli->lli_lsm_md = lsm;
1371 OBD_ALLOC_PTR(attr);
1375 /* validate the lsm */
1376 rc = md_merge_attr(ll_i2mdexp(inode), lsm, attr,
1377 ll_md_blocking_ast);
1383 if (md->body->mbo_valid & OBD_MD_FLNLINK)
1384 md->body->mbo_nlink = attr->cat_nlink;
1385 if (md->body->mbo_valid & OBD_MD_FLSIZE)
1386 md->body->mbo_size = attr->cat_size;
1387 if (md->body->mbo_valid & OBD_MD_FLATIME)
1388 md->body->mbo_atime = attr->cat_atime;
1389 if (md->body->mbo_valid & OBD_MD_FLCTIME)
1390 md->body->mbo_ctime = attr->cat_ctime;
1391 if (md->body->mbo_valid & OBD_MD_FLMTIME)
1392 md->body->mbo_mtime = attr->cat_mtime;
1396 CDEBUG(D_INODE, "Set lsm %p magic %x to "DFID"\n", lsm,
1397 lsm->lsm_md_magic, PFID(ll_inode2fid(inode)));
1401 /* Compare the old and new stripe information */
1402 if (!lsm_md_eq(lli->lli_lsm_md, lsm)) {
1403 struct lmv_stripe_md *old_lsm = lli->lli_lsm_md;
1406 CERROR("%s: inode "DFID"(%p)'s lmv layout mismatch (%p)/(%p)"
1407 "magic:0x%x/0x%x stripe count: %d/%d master_mdt: %d/%d"
1408 "hash_type:0x%x/0x%x layout: 0x%x/0x%x pool:%s/%s\n",
1409 ll_get_fsname(inode->i_sb, NULL, 0), PFID(&lli->lli_fid),
1410 inode, lsm, old_lsm,
1411 lsm->lsm_md_magic, old_lsm->lsm_md_magic,
1412 lsm->lsm_md_stripe_count,
1413 old_lsm->lsm_md_stripe_count,
1414 lsm->lsm_md_master_mdt_index,
1415 old_lsm->lsm_md_master_mdt_index,
1416 lsm->lsm_md_hash_type, old_lsm->lsm_md_hash_type,
1417 lsm->lsm_md_layout_version,
1418 old_lsm->lsm_md_layout_version,
1419 lsm->lsm_md_pool_name,
1420 old_lsm->lsm_md_pool_name);
1422 for (idx = 0; idx < old_lsm->lsm_md_stripe_count; idx++) {
1423 CERROR("%s: sub FIDs in old lsm idx %d, old: "DFID"\n",
1424 ll_get_fsname(inode->i_sb, NULL, 0), idx,
1425 PFID(&old_lsm->lsm_md_oinfo[idx].lmo_fid));
1428 for (idx = 0; idx < lsm->lsm_md_stripe_count; idx++) {
1429 CERROR("%s: sub FIDs in new lsm idx %d, new: "DFID"\n",
1430 ll_get_fsname(inode->i_sb, NULL, 0), idx,
1431 PFID(&lsm->lsm_md_oinfo[idx].lmo_fid));
1440 void ll_clear_inode(struct inode *inode)
1442 struct ll_inode_info *lli = ll_i2info(inode);
1443 struct ll_sb_info *sbi = ll_i2sbi(inode);
1446 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1447 PFID(ll_inode2fid(inode)), inode);
1449 if (S_ISDIR(inode->i_mode)) {
1450 /* these should have been cleared in ll_file_release */
1451 LASSERT(lli->lli_opendir_key == NULL);
1452 LASSERT(lli->lli_sai == NULL);
1453 LASSERT(lli->lli_opendir_pid == 0);
1456 md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1458 LASSERT(!lli->lli_open_fd_write_count);
1459 LASSERT(!lli->lli_open_fd_read_count);
1460 LASSERT(!lli->lli_open_fd_exec_count);
1462 if (lli->lli_mds_write_och)
1463 ll_md_real_close(inode, FMODE_WRITE);
1464 if (lli->lli_mds_exec_och)
1465 ll_md_real_close(inode, FMODE_EXEC);
1466 if (lli->lli_mds_read_och)
1467 ll_md_real_close(inode, FMODE_READ);
1469 if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1470 OBD_FREE(lli->lli_symlink_name,
1471 strlen(lli->lli_symlink_name) + 1);
1472 lli->lli_symlink_name = NULL;
1475 ll_xattr_cache_destroy(inode);
1477 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1478 LASSERT(lli->lli_posix_acl == NULL);
1479 if (lli->lli_remote_perms) {
1480 free_rmtperm_hash(lli->lli_remote_perms);
1481 lli->lli_remote_perms = NULL;
1484 #ifdef CONFIG_FS_POSIX_ACL
1485 else if (lli->lli_posix_acl) {
1486 LASSERT(atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1487 LASSERT(lli->lli_remote_perms == NULL);
1488 posix_acl_release(lli->lli_posix_acl);
1489 lli->lli_posix_acl = NULL;
1492 lli->lli_inode_magic = LLI_INODE_DEAD;
1494 if (S_ISDIR(inode->i_mode))
1495 ll_dir_clear_lsm_md(inode);
1496 else if (S_ISREG(inode->i_mode) && !is_bad_inode(inode))
1497 LASSERT(list_empty(&lli->lli_agl_list));
1500 * XXX This has to be done before lsm is freed below, because
1501 * cl_object still uses inode lsm.
1503 cl_inode_fini(inode);
1508 static int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data)
1510 struct lustre_md md;
1511 struct inode *inode = dentry->d_inode;
1512 struct ll_sb_info *sbi = ll_i2sbi(inode);
1513 struct ptlrpc_request *request = NULL;
1517 op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1518 LUSTRE_OPC_ANY, NULL);
1519 if (IS_ERR(op_data))
1520 RETURN(PTR_ERR(op_data));
1522 rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &request);
1524 ptlrpc_req_finished(request);
1525 if (rc == -ENOENT) {
1527 /* Unlinked special device node? Or just a race?
1528 * Pretend we done everything. */
1529 if (!S_ISREG(inode->i_mode) &&
1530 !S_ISDIR(inode->i_mode)) {
1531 ia_valid = op_data->op_attr.ia_valid;
1532 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1533 rc = simple_setattr(dentry, &op_data->op_attr);
1534 op_data->op_attr.ia_valid = ia_valid;
1536 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1537 CERROR("md_setattr fails: rc = %d\n", rc);
1542 rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1543 sbi->ll_md_exp, &md);
1545 ptlrpc_req_finished(request);
1549 ia_valid = op_data->op_attr.ia_valid;
1550 /* inode size will be in ll_setattr_ost, can't do it now since dirty
1551 * cache is not cleared yet. */
1552 op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1553 if (S_ISREG(inode->i_mode))
1554 mutex_lock(&inode->i_mutex);
1555 rc = simple_setattr(dentry, &op_data->op_attr);
1556 if (S_ISREG(inode->i_mode))
1557 mutex_unlock(&inode->i_mutex);
1558 op_data->op_attr.ia_valid = ia_valid;
1560 rc = ll_update_inode(inode, &md);
1561 ptlrpc_req_finished(request);
1566 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1567 * object(s) determine the file size and mtime. Otherwise, the MDS will
1568 * keep these values until such a time that objects are allocated for it.
1569 * We do the MDS operations first, as it is checking permissions for us.
1570 * We don't to the MDS RPC if there is nothing that we want to store there,
1571 * otherwise there is no harm in updating mtime/atime on the MDS if we are
1572 * going to do an RPC anyways.
1574 * If we are doing a truncate, we will send the mtime and ctime updates
1575 * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1576 * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1579 * In case of HSMimport, we only set attr on MDS.
1581 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr, bool hsm_import)
1583 struct inode *inode = dentry->d_inode;
1584 struct ll_inode_info *lli = ll_i2info(inode);
1585 struct md_op_data *op_data = NULL;
1589 CDEBUG(D_VFSTRACE, "%s: setattr inode "DFID"(%p) from %llu to %llu, "
1590 "valid %x, hsm_import %d\n",
1591 ll_get_fsname(inode->i_sb, NULL, 0), PFID(&lli->lli_fid),
1592 inode, i_size_read(inode), attr->ia_size, attr->ia_valid,
1595 if (attr->ia_valid & ATTR_SIZE) {
1596 /* Check new size against VFS/VM file size limit and rlimit */
1597 rc = inode_newsize_ok(inode, attr->ia_size);
1601 /* The maximum Lustre file size is variable, based on the
1602 * OST maximum object size and number of stripes. This
1603 * needs another check in addition to the VFS check above. */
1604 if (attr->ia_size > ll_file_maxbytes(inode)) {
1605 CDEBUG(D_INODE,"file "DFID" too large %llu > "LPU64"\n",
1606 PFID(&lli->lli_fid), attr->ia_size,
1607 ll_file_maxbytes(inode));
1611 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1614 /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1615 if (attr->ia_valid & TIMES_SET_FLAGS) {
1616 if ((!uid_eq(current_fsuid(), inode->i_uid)) &&
1617 !cfs_capable(CFS_CAP_FOWNER))
1621 /* We mark all of the fields "set" so MDS/OST does not re-set them */
1622 if (!(attr->ia_valid & ATTR_CTIME_SET) &&
1623 (attr->ia_valid & ATTR_CTIME)) {
1624 attr->ia_ctime = CFS_CURRENT_TIME;
1625 attr->ia_valid |= ATTR_CTIME_SET;
1627 if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1628 (attr->ia_valid & ATTR_ATIME)) {
1629 attr->ia_atime = CFS_CURRENT_TIME;
1630 attr->ia_valid |= ATTR_ATIME_SET;
1632 if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1633 (attr->ia_valid & ATTR_MTIME)) {
1634 attr->ia_mtime = CFS_CURRENT_TIME;
1635 attr->ia_valid |= ATTR_MTIME_SET;
1638 if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1639 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %lu\n",
1640 LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1641 cfs_time_current_sec());
1643 if (S_ISREG(inode->i_mode)) {
1644 if (attr->ia_valid & ATTR_SIZE)
1645 inode_dio_write_done(inode);
1646 mutex_unlock(&inode->i_mutex);
1649 /* We always do an MDS RPC, even if we're only changing the size;
1650 * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1652 OBD_ALLOC_PTR(op_data);
1653 if (op_data == NULL)
1654 GOTO(out, rc = -ENOMEM);
1656 if (!hsm_import && attr->ia_valid & ATTR_SIZE) {
1657 /* If we are changing file size, file content is
1658 * modified, flag it. */
1659 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1660 op_data->op_bias |= MDS_DATA_MODIFIED;
1661 ll_file_clear_flag(lli, LLIF_DATA_MODIFIED);
1664 op_data->op_attr = *attr;
1666 rc = ll_md_setattr(dentry, op_data);
1670 if (!S_ISREG(inode->i_mode) || hsm_import)
1673 if (attr->ia_valid & (ATTR_SIZE |
1674 ATTR_ATIME | ATTR_ATIME_SET |
1675 ATTR_MTIME | ATTR_MTIME_SET |
1676 ATTR_CTIME | ATTR_CTIME_SET)) {
1677 /* For truncate and utimes sending attributes to OSTs, setting
1678 * mtime/atime to the past will be performed under PW [0:EOF]
1679 * extent lock (new_size:EOF for truncate). It may seem
1680 * excessive to send mtime/atime updates to OSTs when not
1681 * setting times to past, but it is necessary due to possible
1682 * time de-synchronization between MDT inode and OST objects */
1683 rc = cl_setattr_ost(lli->lli_clob, attr, 0);
1686 /* If the file was restored, it needs to set dirty flag.
1688 * We've already sent MDS_DATA_MODIFIED flag in
1689 * ll_md_setattr() for truncate. However, the MDT refuses to
1690 * set the HS_DIRTY flag on released files, so we have to set
1691 * it again if the file has been restored. Please check how
1692 * LLIF_DATA_MODIFIED is set in vvp_io_setattr_fini().
1694 * Please notice that if the file is not released, the previous
1695 * MDS_DATA_MODIFIED has taken effect and usually
1696 * LLIF_DATA_MODIFIED is not set(see vvp_io_setattr_fini()).
1697 * This way we can save an RPC for common open + trunc
1699 if (ll_file_test_and_clear_flag(lli, LLIF_DATA_MODIFIED)) {
1700 struct hsm_state_set hss = {
1701 .hss_valid = HSS_SETMASK,
1702 .hss_setmask = HS_DIRTY,
1706 rc2 = ll_hsm_state_set(inode, &hss);
1707 /* truncate and write can happen at the same time, so that
1708 * the file can be set modified even though the file is not
1709 * restored from released state, and ll_hsm_state_set() is
1710 * not applicable for the file, and rc2 < 0 is normal in this
1713 CDEBUG(D_INFO, DFID "HSM set dirty failed: rc2 = %d\n",
1714 PFID(ll_inode2fid(inode)), rc2);
1719 if (op_data != NULL)
1720 ll_finish_md_op_data(op_data);
1722 if (S_ISREG(inode->i_mode)) {
1723 mutex_lock(&inode->i_mutex);
1724 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1725 inode_dio_wait(inode);
1728 ll_stats_ops_tally(ll_i2sbi(inode), (attr->ia_valid & ATTR_SIZE) ?
1729 LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1734 int ll_setattr(struct dentry *de, struct iattr *attr)
1736 int mode = de->d_inode->i_mode;
1738 if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1739 (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1740 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1742 if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1743 (ATTR_SIZE|ATTR_MODE)) &&
1744 (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1745 (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1746 !(attr->ia_mode & S_ISGID))))
1747 attr->ia_valid |= ATTR_FORCE;
1749 if ((attr->ia_valid & ATTR_MODE) &&
1751 !(attr->ia_mode & S_ISUID) &&
1752 !(attr->ia_valid & ATTR_KILL_SUID))
1753 attr->ia_valid |= ATTR_KILL_SUID;
1755 if ((attr->ia_valid & ATTR_MODE) &&
1756 ((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1757 !(attr->ia_mode & S_ISGID) &&
1758 !(attr->ia_valid & ATTR_KILL_SGID))
1759 attr->ia_valid |= ATTR_KILL_SGID;
1761 return ll_setattr_raw(de, attr, false);
1764 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1765 __u64 max_age, __u32 flags)
1767 struct ll_sb_info *sbi = ll_s2sbi(sb);
1768 struct obd_statfs obd_osfs;
1772 rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1774 CERROR("md_statfs fails: rc = %d\n", rc);
1778 osfs->os_type = sb->s_magic;
1780 CDEBUG(D_SUPER, "MDC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1781 osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,osfs->os_files);
1783 if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1784 flags |= OBD_STATFS_NODELAY;
1786 rc = obd_statfs_rqset(sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1788 CERROR("obd_statfs fails: rc = %d\n", rc);
1792 CDEBUG(D_SUPER, "OSC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1793 obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1796 osfs->os_bsize = obd_osfs.os_bsize;
1797 osfs->os_blocks = obd_osfs.os_blocks;
1798 osfs->os_bfree = obd_osfs.os_bfree;
1799 osfs->os_bavail = obd_osfs.os_bavail;
1801 /* If we don't have as many objects free on the OST as inodes
1802 * on the MDS, we reduce the total number of inodes to
1803 * compensate, so that the "inodes in use" number is correct.
1805 if (obd_osfs.os_ffree < osfs->os_ffree) {
1806 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1808 osfs->os_ffree = obd_osfs.os_ffree;
1813 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1815 struct super_block *sb = de->d_sb;
1816 struct obd_statfs osfs;
1817 __u64 fsid = huge_encode_dev(sb->s_dev);
1820 CDEBUG(D_VFSTRACE, "VFS Op: at "LPU64" jiffies\n", get_jiffies_64());
1821 ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1823 /* Some amount of caching on the client is allowed */
1824 rc = ll_statfs_internal(sb, &osfs,
1825 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1830 statfs_unpack(sfs, &osfs);
1832 /* We need to downshift for all 32-bit kernels, because we can't
1833 * tell if the kernel is being called via sys_statfs64() or not.
1834 * Stop before overflowing f_bsize - in which case it is better
1835 * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1836 if (sizeof(long) < 8) {
1837 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1840 osfs.os_blocks >>= 1;
1841 osfs.os_bfree >>= 1;
1842 osfs.os_bavail >>= 1;
1846 sfs->f_blocks = osfs.os_blocks;
1847 sfs->f_bfree = osfs.os_bfree;
1848 sfs->f_bavail = osfs.os_bavail;
1849 sfs->f_fsid.val[0] = (__u32)fsid;
1850 sfs->f_fsid.val[1] = (__u32)(fsid >> 32);
1854 void ll_inode_size_lock(struct inode *inode)
1856 struct ll_inode_info *lli;
1858 LASSERT(!S_ISDIR(inode->i_mode));
1860 lli = ll_i2info(inode);
1861 mutex_lock(&lli->lli_size_mutex);
1864 void ll_inode_size_unlock(struct inode *inode)
1866 struct ll_inode_info *lli;
1868 lli = ll_i2info(inode);
1869 mutex_unlock(&lli->lli_size_mutex);
1872 int ll_update_inode(struct inode *inode, struct lustre_md *md)
1874 struct ll_inode_info *lli = ll_i2info(inode);
1875 struct mdt_body *body = md->body;
1876 struct ll_sb_info *sbi = ll_i2sbi(inode);
1878 if (body->mbo_valid & OBD_MD_FLEASIZE)
1879 cl_file_inode_init(inode, md);
1881 if (S_ISDIR(inode->i_mode)) {
1884 rc = ll_update_lsm_md(inode, md);
1889 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1890 if (body->mbo_valid & OBD_MD_FLRMTPERM)
1891 ll_update_remote_perm(inode, md->remote_perm);
1893 #ifdef CONFIG_FS_POSIX_ACL
1894 else if (body->mbo_valid & OBD_MD_FLACL) {
1895 spin_lock(&lli->lli_lock);
1896 if (lli->lli_posix_acl)
1897 posix_acl_release(lli->lli_posix_acl);
1898 lli->lli_posix_acl = md->posix_acl;
1899 spin_unlock(&lli->lli_lock);
1902 inode->i_ino = cl_fid_build_ino(&body->mbo_fid1,
1903 sbi->ll_flags & LL_SBI_32BIT_API);
1904 inode->i_generation = cl_fid_build_gen(&body->mbo_fid1);
1906 if (body->mbo_valid & OBD_MD_FLATIME) {
1907 if (body->mbo_atime > LTIME_S(inode->i_atime))
1908 LTIME_S(inode->i_atime) = body->mbo_atime;
1909 lli->lli_atime = body->mbo_atime;
1912 if (body->mbo_valid & OBD_MD_FLMTIME) {
1913 if (body->mbo_mtime > LTIME_S(inode->i_mtime)) {
1914 CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
1915 "to "LPU64"\n", inode->i_ino,
1916 LTIME_S(inode->i_mtime), body->mbo_mtime);
1917 LTIME_S(inode->i_mtime) = body->mbo_mtime;
1919 lli->lli_mtime = body->mbo_mtime;
1922 if (body->mbo_valid & OBD_MD_FLCTIME) {
1923 if (body->mbo_ctime > LTIME_S(inode->i_ctime))
1924 LTIME_S(inode->i_ctime) = body->mbo_ctime;
1925 lli->lli_ctime = body->mbo_ctime;
1928 if (body->mbo_valid & OBD_MD_FLMODE)
1929 inode->i_mode = (inode->i_mode & S_IFMT) |
1930 (body->mbo_mode & ~S_IFMT);
1932 if (body->mbo_valid & OBD_MD_FLTYPE)
1933 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1934 (body->mbo_mode & S_IFMT);
1936 LASSERT(inode->i_mode != 0);
1937 if (S_ISREG(inode->i_mode))
1938 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1,
1939 LL_MAX_BLKSIZE_BITS);
1941 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1943 if (body->mbo_valid & OBD_MD_FLUID)
1944 inode->i_uid = make_kuid(&init_user_ns, body->mbo_uid);
1945 if (body->mbo_valid & OBD_MD_FLGID)
1946 inode->i_gid = make_kgid(&init_user_ns, body->mbo_gid);
1947 if (body->mbo_valid & OBD_MD_FLFLAGS)
1948 inode->i_flags = ll_ext_to_inode_flags(body->mbo_flags);
1949 if (body->mbo_valid & OBD_MD_FLNLINK)
1950 set_nlink(inode, body->mbo_nlink);
1951 if (body->mbo_valid & OBD_MD_FLRDEV)
1952 inode->i_rdev = old_decode_dev(body->mbo_rdev);
1954 if (body->mbo_valid & OBD_MD_FLID) {
1955 /* FID shouldn't be changed! */
1956 if (fid_is_sane(&lli->lli_fid)) {
1957 LASSERTF(lu_fid_eq(&lli->lli_fid, &body->mbo_fid1),
1958 "Trying to change FID "DFID
1959 " to the "DFID", inode "DFID"(%p)\n",
1960 PFID(&lli->lli_fid), PFID(&body->mbo_fid1),
1961 PFID(ll_inode2fid(inode)), inode);
1963 lli->lli_fid = body->mbo_fid1;
1967 LASSERT(fid_seq(&lli->lli_fid) != 0);
1969 if (body->mbo_valid & OBD_MD_FLSIZE) {
1970 i_size_write(inode, body->mbo_size);
1972 CDEBUG(D_VFSTRACE, "inode="DFID", updating i_size %llu\n",
1973 PFID(ll_inode2fid(inode)),
1974 (unsigned long long)body->mbo_size);
1976 if (body->mbo_valid & OBD_MD_FLBLOCKS)
1977 inode->i_blocks = body->mbo_blocks;
1980 if (body->mbo_valid & OBD_MD_TSTATE) {
1981 /* Set LLIF_FILE_RESTORING if restore ongoing and
1982 * clear it when done to ensure to start again
1983 * glimpsing updated attrs
1985 if (body->mbo_t_state & MS_RESTORE)
1986 ll_file_set_flag(lli, LLIF_FILE_RESTORING);
1988 ll_file_clear_flag(lli, LLIF_FILE_RESTORING);
1994 int ll_read_inode2(struct inode *inode, void *opaque)
1996 struct lustre_md *md = opaque;
1997 struct ll_inode_info *lli = ll_i2info(inode);
2001 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
2002 PFID(&lli->lli_fid), inode);
2004 /* Core attributes from the MDS first. This is a new inode, and
2005 * the VFS doesn't zero times in the core inode so we have to do
2006 * it ourselves. They will be overwritten by either MDS or OST
2007 * attributes - we just need to make sure they aren't newer. */
2008 LTIME_S(inode->i_mtime) = 0;
2009 LTIME_S(inode->i_atime) = 0;
2010 LTIME_S(inode->i_ctime) = 0;
2012 rc = ll_update_inode(inode, md);
2016 /* OIDEBUG(inode); */
2018 #ifdef HAVE_BACKING_DEV_INFO
2019 /* initializing backing dev info. */
2020 inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
2022 if (S_ISREG(inode->i_mode)) {
2023 struct ll_sb_info *sbi = ll_i2sbi(inode);
2024 inode->i_op = &ll_file_inode_operations;
2025 inode->i_fop = sbi->ll_fop;
2026 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
2028 } else if (S_ISDIR(inode->i_mode)) {
2029 inode->i_op = &ll_dir_inode_operations;
2030 inode->i_fop = &ll_dir_operations;
2032 } else if (S_ISLNK(inode->i_mode)) {
2033 inode->i_op = &ll_fast_symlink_inode_operations;
2036 inode->i_op = &ll_special_inode_operations;
2038 init_special_inode(inode, inode->i_mode,
2047 void ll_delete_inode(struct inode *inode)
2049 struct ll_inode_info *lli = ll_i2info(inode);
2052 if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
2053 /* It is last chance to write out dirty pages,
2054 * otherwise we may lose data while umount */
2055 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF, CL_FSYNC_LOCAL, 1);
2057 truncate_inode_pages_final(&inode->i_data);
2059 LASSERTF(inode->i_data.nrpages == 0, "inode="DFID"(%p) nrpages=%lu, "
2060 "see https://jira.hpdd.intel.com/browse/LU-118\n",
2061 PFID(ll_inode2fid(inode)), inode, inode->i_data.nrpages);
2063 #ifdef HAVE_SBOPS_EVICT_INODE
2064 ll_clear_inode(inode);
2071 int ll_iocontrol(struct inode *inode, struct file *file,
2072 unsigned int cmd, unsigned long arg)
2074 struct ll_sb_info *sbi = ll_i2sbi(inode);
2075 struct ptlrpc_request *req = NULL;
2080 case FSFILT_IOC_GETFLAGS: {
2081 struct mdt_body *body;
2082 struct md_op_data *op_data;
2084 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
2085 0, 0, LUSTRE_OPC_ANY,
2087 if (IS_ERR(op_data))
2088 RETURN(PTR_ERR(op_data));
2090 op_data->op_valid = OBD_MD_FLFLAGS;
2091 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
2092 ll_finish_md_op_data(op_data);
2094 CERROR("%s: failure inode "DFID": rc = %d\n",
2095 sbi->ll_md_exp->exp_obd->obd_name,
2096 PFID(ll_inode2fid(inode)), rc);
2100 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
2102 flags = body->mbo_flags;
2104 ptlrpc_req_finished(req);
2106 RETURN(put_user(flags, (int __user *)arg));
2108 case FSFILT_IOC_SETFLAGS: {
2110 struct md_op_data *op_data;
2111 struct cl_object *obj;
2113 if (get_user(flags, (int __user *)arg))
2116 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
2117 LUSTRE_OPC_ANY, NULL);
2118 if (IS_ERR(op_data))
2119 RETURN(PTR_ERR(op_data));
2121 op_data->op_attr_flags = flags;
2122 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
2123 rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &req);
2124 ll_finish_md_op_data(op_data);
2125 ptlrpc_req_finished(req);
2129 inode->i_flags = ll_ext_to_inode_flags(flags);
2131 obj = ll_i2info(inode)->lli_clob;
2135 OBD_ALLOC_PTR(attr);
2139 attr->ia_valid = ATTR_ATTR_FLAG;
2140 rc = cl_setattr_ost(obj, attr, flags);
2152 int ll_flush_ctx(struct inode *inode)
2154 struct ll_sb_info *sbi = ll_i2sbi(inode);
2156 CDEBUG(D_SEC, "flush context for user %d\n",
2157 from_kuid(&init_user_ns, current_uid()));
2159 obd_set_info_async(NULL, sbi->ll_md_exp,
2160 sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2162 obd_set_info_async(NULL, sbi->ll_dt_exp,
2163 sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2168 /* umount -f client means force down, don't save state */
2169 void ll_umount_begin(struct super_block *sb)
2171 struct ll_sb_info *sbi = ll_s2sbi(sb);
2172 struct obd_device *obd;
2173 struct obd_ioctl_data *ioc_data;
2176 CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2177 sb->s_count, atomic_read(&sb->s_active));
2179 obd = class_exp2obd(sbi->ll_md_exp);
2181 CERROR("Invalid MDC connection handle "LPX64"\n",
2182 sbi->ll_md_exp->exp_handle.h_cookie);
2188 obd = class_exp2obd(sbi->ll_dt_exp);
2190 CERROR("Invalid LOV connection handle "LPX64"\n",
2191 sbi->ll_dt_exp->exp_handle.h_cookie);
2197 OBD_ALLOC_PTR(ioc_data);
2199 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2200 sizeof *ioc_data, ioc_data, NULL);
2202 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2203 sizeof *ioc_data, ioc_data, NULL);
2205 OBD_FREE_PTR(ioc_data);
2208 /* Really, we'd like to wait until there are no requests outstanding,
2209 * and then continue. For now, we just invalidate the requests,
2210 * schedule() and sleep one second if needed, and hope.
2216 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2218 struct ll_sb_info *sbi = ll_s2sbi(sb);
2219 char *profilenm = get_profile_name(sb);
2223 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2224 read_only = *flags & MS_RDONLY;
2225 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2226 sizeof(KEY_READ_ONLY),
2227 KEY_READ_ONLY, sizeof(read_only),
2230 LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2231 profilenm, read_only ?
2232 "read-only" : "read-write", err);
2237 sb->s_flags |= MS_RDONLY;
2239 sb->s_flags &= ~MS_RDONLY;
2241 if (sbi->ll_flags & LL_SBI_VERBOSE)
2242 LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2243 read_only ? "read-only" : "read-write");
2249 * Cleanup the open handle that is cached on MDT-side.
2251 * For open case, the client side open handling thread may hit error
2252 * after the MDT grant the open. Under such case, the client should
2253 * send close RPC to the MDT as cleanup; otherwise, the open handle
2254 * on the MDT will be leaked there until the client umount or evicted.
2256 * In further, if someone unlinked the file, because the open handle
2257 * holds the reference on such file/object, then it will block the
2258 * subsequent threads that want to locate such object via FID.
2260 * \param[in] sb super block for this file-system
2261 * \param[in] open_req pointer to the original open request
2263 void ll_open_cleanup(struct super_block *sb, struct ptlrpc_request *open_req)
2265 struct mdt_body *body;
2266 struct md_op_data *op_data;
2267 struct ptlrpc_request *close_req = NULL;
2268 struct obd_export *exp = ll_s2sbi(sb)->ll_md_exp;
2271 body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
2272 OBD_ALLOC_PTR(op_data);
2273 if (op_data == NULL) {
2274 CWARN("%s: cannot allocate op_data to release open handle for "
2276 ll_get_fsname(sb, NULL, 0), PFID(&body->mbo_fid1));
2281 op_data->op_fid1 = body->mbo_fid1;
2282 op_data->op_handle = body->mbo_handle;
2283 op_data->op_mod_time = cfs_time_current_sec();
2284 md_close(exp, op_data, NULL, &close_req);
2285 ptlrpc_req_finished(close_req);
2286 ll_finish_md_op_data(op_data);
2291 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2292 struct super_block *sb, struct lookup_intent *it)
2294 struct ll_sb_info *sbi = NULL;
2295 struct lustre_md md = { NULL };
2299 LASSERT(*inode || sb);
2300 sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2301 rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2302 sbi->ll_md_exp, &md);
2307 rc = ll_update_inode(*inode, &md);
2311 LASSERT(sb != NULL);
2314 * At this point server returns to client's same fid as client
2315 * generated for creating. So using ->fid1 is okay here.
2317 LASSERT(fid_is_sane(&md.body->mbo_fid1));
2319 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->mbo_fid1,
2320 sbi->ll_flags & LL_SBI_32BIT_API),
2322 if (IS_ERR(*inode)) {
2323 #ifdef CONFIG_FS_POSIX_ACL
2325 posix_acl_release(md.posix_acl);
2326 md.posix_acl = NULL;
2329 rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2331 CERROR("new_inode -fatal: rc %d\n", rc);
2336 /* Handling piggyback layout lock.
2337 * Layout lock can be piggybacked by getattr and open request.
2338 * The lsm can be applied to inode only if it comes with a layout lock
2339 * otherwise correct layout may be overwritten, for example:
2340 * 1. proc1: mdt returns a lsm but not granting layout
2341 * 2. layout was changed by another client
2342 * 3. proc2: refresh layout and layout lock granted
2343 * 4. proc1: to apply a stale layout */
2344 if (it != NULL && it->d.lustre.it_lock_mode != 0) {
2345 struct lustre_handle lockh;
2346 struct ldlm_lock *lock;
2348 lockh.cookie = it->d.lustre.it_lock_handle;
2349 lock = ldlm_handle2lock(&lockh);
2350 LASSERT(lock != NULL);
2351 if (ldlm_has_layout(lock)) {
2352 struct cl_object_conf conf;
2354 memset(&conf, 0, sizeof(conf));
2355 conf.coc_opc = OBJECT_CONF_SET;
2356 conf.coc_inode = *inode;
2357 conf.coc_lock = lock;
2358 conf.u.coc_layout = md.layout;
2359 (void)ll_layout_conf(*inode, &conf);
2361 LDLM_LOCK_PUT(lock);
2367 md_free_lustre_md(sbi->ll_md_exp, &md);
2370 if (rc != 0 && it != NULL && it->it_op & IT_OPEN)
2371 ll_open_cleanup(sb != NULL ? sb : (*inode)->i_sb, req);
2376 int ll_obd_statfs(struct inode *inode, void __user *arg)
2378 struct ll_sb_info *sbi = NULL;
2379 struct obd_export *exp;
2381 struct obd_ioctl_data *data = NULL;
2385 if (!inode || !(sbi = ll_i2sbi(inode)))
2386 GOTO(out_statfs, rc = -EINVAL);
2388 rc = obd_ioctl_getdata(&buf, &len, arg);
2390 GOTO(out_statfs, rc);
2393 if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2394 !data->ioc_pbuf1 || !data->ioc_pbuf2)
2395 GOTO(out_statfs, rc = -EINVAL);
2397 if (data->ioc_inllen1 != sizeof(__u32) ||
2398 data->ioc_inllen2 != sizeof(__u32) ||
2399 data->ioc_plen1 != sizeof(struct obd_statfs) ||
2400 data->ioc_plen2 != sizeof(struct obd_uuid))
2401 GOTO(out_statfs, rc = -EINVAL);
2403 memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2404 if (type & LL_STATFS_LMV)
2405 exp = sbi->ll_md_exp;
2406 else if (type & LL_STATFS_LOV)
2407 exp = sbi->ll_dt_exp;
2409 GOTO(out_statfs, rc = -ENODEV);
2411 rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, NULL);
2413 GOTO(out_statfs, rc);
2416 obd_ioctl_freedata(buf, len);
2420 int ll_process_config(struct lustre_cfg *lcfg)
2422 struct super_block *sb;
2427 /* The instance name contains the sb: lustre-client-aacfe000 */
2428 ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2429 if (!ptr || !*(++ptr))
2431 if (sscanf(ptr, "%lx", &x) != 1)
2433 sb = (struct super_block *)x;
2434 /* This better be a real Lustre superblock! */
2435 LASSERT(s2lsi(sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2437 /* Note we have not called client_common_fill_super yet, so
2438 proc fns must be able to handle that! */
2439 rc = class_process_proc_param(PARAM_LLITE, lprocfs_llite_obd_vars,
2446 /* this function prepares md_op_data hint for passing it down to MD stack. */
2447 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
2448 struct inode *i1, struct inode *i2,
2449 const char *name, size_t namelen,
2450 __u32 mode, __u32 opc, void *data)
2452 LASSERT(i1 != NULL);
2455 /* Do not reuse namelen for something else. */
2457 return ERR_PTR(-EINVAL);
2459 if (namelen > ll_i2sbi(i1)->ll_namelen)
2460 return ERR_PTR(-ENAMETOOLONG);
2462 if (!lu_name_is_valid_2(name, namelen))
2463 return ERR_PTR(-EINVAL);
2466 if (op_data == NULL)
2467 OBD_ALLOC_PTR(op_data);
2469 if (op_data == NULL)
2470 return ERR_PTR(-ENOMEM);
2472 ll_i2gids(op_data->op_suppgids, i1, i2);
2473 op_data->op_fid1 = *ll_inode2fid(i1);
2474 op_data->op_default_stripe_offset = -1;
2475 if (S_ISDIR(i1->i_mode)) {
2476 op_data->op_mea1 = ll_i2info(i1)->lli_lsm_md;
2477 if (opc == LUSTRE_OPC_MKDIR)
2478 op_data->op_default_stripe_offset =
2479 ll_i2info(i1)->lli_def_stripe_offset;
2483 op_data->op_fid2 = *ll_inode2fid(i2);
2484 if (S_ISDIR(i2->i_mode))
2485 op_data->op_mea2 = ll_i2info(i2)->lli_lsm_md;
2487 fid_zero(&op_data->op_fid2);
2490 if (ll_i2sbi(i1)->ll_flags & LL_SBI_64BIT_HASH)
2491 op_data->op_cli_flags |= CLI_HASH64;
2493 if (ll_need_32bit_api(ll_i2sbi(i1)))
2494 op_data->op_cli_flags |= CLI_API32;
2496 op_data->op_name = name;
2497 op_data->op_namelen = namelen;
2498 op_data->op_mode = mode;
2499 op_data->op_mod_time = cfs_time_current_sec();
2500 op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2501 op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2502 op_data->op_cap = cfs_curproc_cap_pack();
2503 if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2504 filename_is_volatile(name, namelen, &op_data->op_mds)) {
2505 op_data->op_bias |= MDS_CREATE_VOLATILE;
2507 op_data->op_mds = 0;
2509 op_data->op_data = data;
2514 void ll_finish_md_op_data(struct md_op_data *op_data)
2516 OBD_FREE_PTR(op_data);
2519 #ifdef HAVE_SUPEROPS_USE_DENTRY
2520 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2522 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
2525 struct ll_sb_info *sbi;
2527 #ifdef HAVE_SUPEROPS_USE_DENTRY
2528 LASSERT((seq != NULL) && (dentry != NULL));
2529 sbi = ll_s2sbi(dentry->d_sb);
2531 LASSERT((seq != NULL) && (vfs != NULL));
2532 sbi = ll_s2sbi(vfs->mnt_sb);
2535 if (sbi->ll_flags & LL_SBI_NOLCK)
2536 seq_puts(seq, ",nolock");
2538 if (sbi->ll_flags & LL_SBI_FLOCK)
2539 seq_puts(seq, ",flock");
2541 if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2542 seq_puts(seq, ",localflock");
2544 if (sbi->ll_flags & LL_SBI_USER_XATTR)
2545 seq_puts(seq, ",user_xattr");
2547 if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2548 seq_puts(seq, ",lazystatfs");
2550 if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2551 seq_puts(seq, ",user_fid2path");
2553 if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
2554 seq_puts(seq, ",always_ping");
2560 * Get obd name by cmd, and copy out to user space
2562 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2564 struct ll_sb_info *sbi = ll_i2sbi(inode);
2565 struct obd_device *obd;
2568 if (cmd == OBD_IOC_GETDTNAME)
2569 obd = class_exp2obd(sbi->ll_dt_exp);
2570 else if (cmd == OBD_IOC_GETMDNAME)
2571 obd = class_exp2obd(sbi->ll_md_exp);
2578 if (copy_to_user((void __user *)arg, obd->obd_name,
2579 strlen(obd->obd_name) + 1))
2586 * Get lustre file system name by \a sbi. If \a buf is provided(non-NULL), the
2587 * fsname will be returned in this buffer; otherwise, a static buffer will be
2588 * used to store the fsname and returned to caller.
2590 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
2592 static char fsname_static[MTI_NAME_MAXLEN];
2593 struct lustre_sb_info *lsi = s2lsi(sb);
2598 /* this means the caller wants to use static buffer
2599 * and it doesn't care about race. Usually this is
2600 * in error reporting path */
2601 buf = fsname_static;
2602 buflen = sizeof(fsname_static);
2605 len = strlen(lsi->lsi_lmd->lmd_profile);
2606 ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
2607 if (ptr && (strcmp(ptr, "-client") == 0))
2610 if (unlikely(len >= buflen))
2612 strncpy(buf, lsi->lsi_lmd->lmd_profile, len);
2618 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
2625 p.mnt = current->fs->root.mnt;
2627 path = d_path(&p, buf, bufsize);
2632 void ll_dirty_page_discard_warn(struct page *page, int ioret)
2634 char *buf, *path = NULL;
2635 struct dentry *dentry = NULL;
2636 struct inode *inode = page->mapping->host;
2638 /* this can be called inside spin lock so use GFP_ATOMIC. */
2639 buf = (char *)__get_free_page(GFP_ATOMIC);
2641 dentry = d_find_alias(page->mapping->host);
2643 path = ll_d_path(dentry, buf, PAGE_SIZE);
2647 "%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
2648 "(rc %d)\n", ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
2649 s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2650 PFID(ll_inode2fid(inode)),
2651 (path && !IS_ERR(path)) ? path : "", ioret);
2657 free_page((unsigned long)buf);
2660 ssize_t ll_copy_user_md(const struct lov_user_md __user *md,
2661 struct lov_user_md **kbuf)
2663 struct lov_user_md lum;
2667 if (copy_from_user(&lum, md, sizeof(lum)))
2670 lum_size = ll_lov_user_md_size(&lum);
2674 OBD_ALLOC(*kbuf, lum_size);
2678 if (copy_from_user(*kbuf, md, lum_size) != 0) {
2679 OBD_FREE(*kbuf, lum_size);
2687 * Compute llite root squash state after a change of root squash
2688 * configuration setting or add/remove of a lnet nid
2690 void ll_compute_rootsquash_state(struct ll_sb_info *sbi)
2692 struct root_squash_info *squash = &sbi->ll_squash;
2695 lnet_process_id_t id;
2697 /* Update norootsquash flag */
2698 down_write(&squash->rsi_sem);
2699 if (list_empty(&squash->rsi_nosquash_nids))
2700 sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2702 /* Do not apply root squash as soon as one of our NIDs is
2703 * in the nosquash_nids list */
2706 while (LNetGetId(i++, &id) != -ENOENT) {
2707 if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
2709 if (cfs_match_nid(id.nid, &squash->rsi_nosquash_nids)) {
2715 sbi->ll_flags |= LL_SBI_NOROOTSQUASH;
2717 sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2719 up_write(&squash->rsi_sem);
2723 * Parse linkea content to extract information about a given hardlink
2725 * \param[in] ldata - Initialized linkea data
2726 * \param[in] linkno - Link identifier
2727 * \param[out] parent_fid - The entry's parent FID
2728 * \param[out] ln - Entry name destination buffer
2730 * \retval 0 on success
2731 * \retval Appropriate negative error code on failure
2733 static int ll_linkea_decode(struct linkea_data *ldata, unsigned int linkno,
2734 struct lu_fid *parent_fid, struct lu_name *ln)
2740 rc = linkea_init(ldata);
2744 if (linkno >= ldata->ld_leh->leh_reccount)
2745 /* beyond last link */
2748 linkea_first_entry(ldata);
2749 for (idx = 0; ldata->ld_lee != NULL; idx++) {
2750 linkea_entry_unpack(ldata->ld_lee, &ldata->ld_reclen, ln,
2755 linkea_next_entry(ldata);
2765 * Get parent FID and name of an identified link. Operation is performed for
2766 * a given link number, letting the caller iterate over linkno to list one or
2767 * all links of an entry.
2769 * \param[in] file - File descriptor against which to perform the operation
2770 * \param[in,out] arg - User-filled structure containing the linkno to operate
2771 * on and the available size. It is eventually filled with
2772 * the requested information or left untouched on error
2774 * \retval - 0 on success
2775 * \retval - Appropriate negative error code on failure
2777 int ll_getparent(struct file *file, struct getparent __user *arg)
2779 struct dentry *dentry = file->f_path.dentry;
2780 struct inode *inode = dentry->d_inode;
2781 struct linkea_data *ldata;
2782 struct lu_buf buf = LU_BUF_NULL;
2784 struct lu_fid parent_fid;
2791 if (!cfs_capable(CFS_CAP_DAC_READ_SEARCH) &&
2792 !(ll_i2sbi(inode)->ll_flags & LL_SBI_USER_FID2PATH))
2795 if (get_user(name_size, &arg->gp_name_size))
2798 if (get_user(linkno, &arg->gp_linkno))
2801 if (name_size > PATH_MAX)
2804 OBD_ALLOC(ldata, sizeof(*ldata));
2808 rc = linkea_data_new(ldata, &buf);
2810 GOTO(ldata_free, rc);
2812 rc = ll_getxattr(dentry, XATTR_NAME_LINK, buf.lb_buf, buf.lb_len);
2816 rc = ll_linkea_decode(ldata, linkno, &parent_fid, &ln);
2820 if (ln.ln_namelen >= name_size)
2821 GOTO(lb_free, rc = -EOVERFLOW);
2823 if (copy_to_user(&arg->gp_fid, &parent_fid, sizeof(arg->gp_fid)))
2824 GOTO(lb_free, rc = -EFAULT);
2826 if (copy_to_user(&arg->gp_name, ln.ln_name, ln.ln_namelen))
2827 GOTO(lb_free, rc = -EFAULT);
2829 if (put_user('\0', arg->gp_name + ln.ln_namelen))
2830 GOTO(lb_free, rc = -EFAULT);
2835 OBD_FREE(ldata, sizeof(*ldata));