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, 2014, 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;
214 #ifdef HAVE_LRU_RESIZE_SUPPORT
215 if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
216 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
218 #ifdef CONFIG_FS_POSIX_ACL
219 data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK;
222 if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
223 /* flag mdc connection as lightweight, only used for test
224 * purpose, use with care */
225 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
227 data->ocd_ibits_known = MDS_INODELOCK_FULL;
228 data->ocd_version = LUSTRE_VERSION_CODE;
230 if (sb->s_flags & MS_RDONLY)
231 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
232 if (sbi->ll_flags & LL_SBI_USER_XATTR)
233 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
235 #ifdef HAVE_MS_FLOCK_LOCK
236 /* force vfs to use lustre handler for flock() calls - bug 10743 */
237 sb->s_flags |= MS_FLOCK_LOCK;
239 #ifdef MS_HAS_NEW_AOPS
240 sb->s_flags |= MS_HAS_NEW_AOPS;
243 if (sbi->ll_flags & LL_SBI_FLOCK)
244 sbi->ll_fop = &ll_file_operations_flock;
245 else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
246 sbi->ll_fop = &ll_file_operations;
248 sbi->ll_fop = &ll_file_operations_noflock;
251 data->ocd_connect_flags |= OBD_CONNECT_REAL;
252 if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
253 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
255 data->ocd_brw_size = MD_MAX_BRW_SIZE;
257 err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid, data, NULL);
259 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
260 "recovery, of which this client is not a "
261 "part. Please wait for recovery to complete,"
262 " abort, or time out.\n", md);
265 CERROR("cannot connect to %s: rc = %d\n", md, err);
269 sbi->ll_md_exp->exp_connect_data = *data;
271 err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
272 LUSTRE_SEQ_METADATA);
274 CERROR("%s: Can't init metadata layer FID infrastructure, "
275 "rc = %d\n", sbi->ll_md_exp->exp_obd->obd_name, err);
279 /* For mount, we only need fs info from MDT0, and also in DNE, it
280 * can make sure the client can be mounted as long as MDT0 is
282 err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
283 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
284 OBD_STATFS_FOR_MDT0);
286 GOTO(out_md_fid, err);
288 /* This needs to be after statfs to ensure connect has finished.
289 * Note that "data" does NOT contain the valid connect reply.
290 * If connecting to a 1.8 server there will be no LMV device, so
291 * we can access the MDC export directly and exp_connect_flags will
292 * be non-zero, but if accessing an upgraded 2.1 server it will
293 * have the correct flags filled in.
294 * XXX: fill in the LMV exp_connect_flags from MDC(s). */
295 valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
296 if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
297 valid != CLIENT_CONNECT_MDT_REQD) {
300 OBD_ALLOC_WAIT(buf, PAGE_CACHE_SIZE);
301 obd_connect_flags2str(buf, PAGE_CACHE_SIZE,
302 valid ^ CLIENT_CONNECT_MDT_REQD, ",");
303 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
304 "feature(s) needed for correct operation "
305 "of this client (%s). Please upgrade "
306 "server or downgrade client.\n",
307 sbi->ll_md_exp->exp_obd->obd_name, buf);
308 OBD_FREE(buf, PAGE_CACHE_SIZE);
309 GOTO(out_md_fid, err = -EPROTO);
312 size = sizeof(*data);
313 err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
314 KEY_CONN_DATA, &size, data);
316 CERROR("%s: Get connect data failed: rc = %d\n",
317 sbi->ll_md_exp->exp_obd->obd_name, err);
318 GOTO(out_md_fid, err);
321 LASSERT(osfs->os_bsize);
322 sb->s_blocksize = osfs->os_bsize;
323 sb->s_blocksize_bits = log2(osfs->os_bsize);
324 sb->s_magic = LL_SUPER_MAGIC;
325 sb->s_maxbytes = MAX_LFS_FILESIZE;
326 sbi->ll_namelen = osfs->os_namelen;
328 if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
329 !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
330 LCONSOLE_INFO("Disabling user_xattr feature because "
331 "it is not supported on the server\n");
332 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
335 if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
337 sb->s_flags |= MS_POSIXACL;
339 sbi->ll_flags |= LL_SBI_ACL;
341 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
343 sb->s_flags &= ~MS_POSIXACL;
345 sbi->ll_flags &= ~LL_SBI_ACL;
348 if (data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) {
349 if (!(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
350 sbi->ll_flags |= LL_SBI_RMT_CLIENT;
351 LCONSOLE_INFO("client is set as remote by default.\n");
354 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
355 sbi->ll_flags &= ~LL_SBI_RMT_CLIENT;
356 LCONSOLE_INFO("client claims to be remote, but server "
357 "rejected, forced to be local.\n");
361 if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
362 sbi->ll_flags |= LL_SBI_64BIT_HASH;
364 if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE)
365 sbi->ll_md_brw_pages = data->ocd_brw_size >> PAGE_CACHE_SHIFT;
367 sbi->ll_md_brw_pages = 1;
369 if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK)
370 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
372 if (data->ocd_ibits_known & MDS_INODELOCK_XATTR) {
373 if (!(data->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)) {
374 LCONSOLE_INFO("%s: disabling xattr cache due to "
375 "unknown maximum xattr size.\n", dt);
377 sbi->ll_flags |= LL_SBI_XATTR_CACHE;
378 sbi->ll_xattr_cache_enabled = 1;
382 obd = class_name2obd(dt);
384 CERROR("DT %s: not setup or attached\n", dt);
385 GOTO(out_md_fid, err = -ENODEV);
388 data->ocd_connect_flags = OBD_CONNECT_GRANT | OBD_CONNECT_VERSION |
389 OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
390 OBD_CONNECT_CANCELSET | OBD_CONNECT_FID |
391 OBD_CONNECT_SRVLOCK | OBD_CONNECT_TRUNCLOCK|
392 OBD_CONNECT_AT | OBD_CONNECT_RMT_CLIENT |
393 OBD_CONNECT_OSS_CAPA | OBD_CONNECT_VBR|
394 OBD_CONNECT_FULL20 | OBD_CONNECT_64BITHASH |
395 OBD_CONNECT_MAXBYTES |
396 OBD_CONNECT_EINPROGRESS |
397 OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
398 OBD_CONNECT_LAYOUTLOCK |
399 OBD_CONNECT_PINGLESS | OBD_CONNECT_LFSCK |
400 OBD_CONNECT_BULK_MBITS;
402 if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_CKSUM)) {
403 /* OBD_CONNECT_CKSUM should always be set, even if checksums are
404 * disabled by default, because it can still be enabled on the
405 * fly via /proc. As a consequence, we still need to come to an
406 * agreement on the supported algorithms at connect time */
407 data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
409 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
410 data->ocd_cksum_types = OBD_CKSUM_ADLER;
412 data->ocd_cksum_types = cksum_types_supported_client();
415 #ifdef HAVE_LRU_RESIZE_SUPPORT
416 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
418 if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
419 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
421 CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d "
422 "ocd_grant: %d\n", data->ocd_connect_flags,
423 data->ocd_version, data->ocd_grant);
425 obd->obd_upcall.onu_owner = &sbi->ll_lco;
426 obd->obd_upcall.onu_upcall = cl_ocd_update;
428 data->ocd_brw_size = DT_MAX_BRW_SIZE;
430 err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data,
433 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
434 "recovery, of which this client is not a "
435 "part. Please wait for recovery to "
436 "complete, abort, or time out.\n", dt);
439 CERROR("%s: Cannot connect to %s: rc = %d\n",
440 sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
444 sbi->ll_dt_exp->exp_connect_data = *data;
446 err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
447 LUSTRE_SEQ_METADATA);
449 CERROR("%s: Can't init data layer FID infrastructure, "
450 "rc = %d\n", sbi->ll_dt_exp->exp_obd->obd_name, err);
454 mutex_lock(&sbi->ll_lco.lco_lock);
455 sbi->ll_lco.lco_flags = data->ocd_connect_flags;
456 sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
457 sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
458 mutex_unlock(&sbi->ll_lco.lco_lock);
460 fid_zero(&sbi->ll_root_fid);
461 err = md_getstatus(sbi->ll_md_exp, &sbi->ll_root_fid);
463 CERROR("cannot mds_connect: rc = %d\n", err);
464 GOTO(out_lock_cn_cb, err);
466 if (!fid_is_sane(&sbi->ll_root_fid)) {
467 CERROR("%s: Invalid root fid "DFID" during mount\n",
468 sbi->ll_md_exp->exp_obd->obd_name,
469 PFID(&sbi->ll_root_fid));
470 GOTO(out_lock_cn_cb, err = -EINVAL);
472 CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
474 sb->s_op = &lustre_super_operations;
475 #if THREAD_SIZE >= 8192 /*b=17630*/
476 sb->s_export_op = &lustre_export_operations;
480 * XXX: move this to after cbd setup? */
481 valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMODEASIZE;
482 if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
483 valid |= OBD_MD_FLRMTPERM;
484 else if (sbi->ll_flags & LL_SBI_ACL)
485 valid |= OBD_MD_FLACL;
487 OBD_ALLOC_PTR(op_data);
489 GOTO(out_lock_cn_cb, err = -ENOMEM);
491 op_data->op_fid1 = sbi->ll_root_fid;
492 op_data->op_mode = 0;
493 op_data->op_valid = valid;
495 err = md_getattr(sbi->ll_md_exp, op_data, &request);
497 OBD_FREE_PTR(op_data);
499 CERROR("%s: md_getattr failed for root: rc = %d\n",
500 sbi->ll_md_exp->exp_obd->obd_name, err);
501 GOTO(out_lock_cn_cb, err);
504 err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
505 sbi->ll_md_exp, &lmd);
507 CERROR("failed to understand root inode md: rc = %d\n", err);
508 ptlrpc_req_finished(request);
509 GOTO(out_lock_cn_cb, err);
512 LASSERT(fid_is_sane(&sbi->ll_root_fid));
513 root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
514 sbi->ll_flags & LL_SBI_32BIT_API),
516 md_free_lustre_md(sbi->ll_md_exp, &lmd);
517 ptlrpc_req_finished(request);
520 #ifdef CONFIG_FS_POSIX_ACL
522 posix_acl_release(lmd.posix_acl);
523 lmd.posix_acl = NULL;
526 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
528 CERROR("lustre_lite: bad iget4 for root\n");
532 #ifdef CONFIG_FS_POSIX_ACL
533 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
534 rct_init(&sbi->ll_rct);
535 et_init(&sbi->ll_et);
539 checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
540 err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
541 KEY_CHECKSUM, sizeof(checksum), &checksum,
545 err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CACHE_SET),
546 KEY_CACHE_SET, sizeof(*sbi->ll_cache),
547 sbi->ll_cache, NULL);
549 sb->s_root = d_make_root(root);
550 if (sb->s_root == NULL) {
551 CERROR("%s: can't make root dentry\n",
552 ll_get_fsname(sb, NULL, 0));
553 GOTO(out_root, err = -ENOMEM);
555 #ifdef HAVE_DCACHE_LOCK
556 sb->s_root->d_op = &ll_d_ops;
559 sbi->ll_sdev_orig = sb->s_dev;
561 /* We set sb->s_dev equal on all lustre clients in order to support
562 * NFS export clustering. NFSD requires that the FSID be the same
564 /* s_dev is also used in lt_compare() to compare two fs, but that is
565 * only a node-local comparison. */
566 uuid = obd_get_uuid(sbi->ll_md_exp);
568 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
574 if (proc_lustre_fs_root != NULL) {
575 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
578 CERROR("%s: could not register mount in lprocfs: "
579 "rc = %d\n", ll_get_fsname(sb, NULL, 0), err);
589 obd_fid_fini(sbi->ll_dt_exp->exp_obd);
591 obd_disconnect(sbi->ll_dt_exp);
592 sbi->ll_dt_exp = NULL;
594 obd_fid_fini(sbi->ll_md_exp->exp_obd);
596 obd_disconnect(sbi->ll_md_exp);
597 sbi->ll_md_exp = NULL;
606 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
610 size = sizeof(*lmmsize);
611 rc = obd_get_info(NULL, sbi->ll_dt_exp, sizeof(KEY_MAX_EASIZE),
612 KEY_MAX_EASIZE, &size, lmmsize);
614 CERROR("%s: cannot get max LOV EA size: rc = %d\n",
615 sbi->ll_dt_exp->exp_obd->obd_name, rc);
620 rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
621 KEY_MAX_EASIZE, &size, lmmsize);
623 CERROR("Get max mdsize error rc %d\n", rc);
629 * Get the value of the default_easize parameter.
631 * \see client_obd::cl_default_mds_easize
633 * \param[in] sbi superblock info for this filesystem
634 * \param[out] lmmsize pointer to storage location for value
636 * \retval 0 on success
637 * \retval negative negated errno on failure
639 int ll_get_default_mdsize(struct ll_sb_info *sbi, int *lmmsize)
644 rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_DEFAULT_EASIZE),
645 KEY_DEFAULT_EASIZE, &size, lmmsize);
647 CERROR("Get default mdsize error rc %d\n", rc);
653 * Set the default_easize parameter to the given value.
655 * \see client_obd::cl_default_mds_easize
657 * \param[in] sbi superblock info for this filesystem
658 * \param[in] lmmsize the size to set
660 * \retval 0 on success
661 * \retval negative negated errno on failure
663 int ll_set_default_mdsize(struct ll_sb_info *sbi, int lmmsize)
667 if (lmmsize < sizeof(struct lov_mds_md) ||
668 lmmsize > OBD_MAX_DEFAULT_EA_SIZE)
671 rc = obd_set_info_async(NULL, sbi->ll_md_exp,
672 sizeof(KEY_DEFAULT_EASIZE), KEY_DEFAULT_EASIZE,
673 sizeof(int), &lmmsize, NULL);
678 static void ll_dump_inode(struct inode *inode)
680 struct ll_d_hlist_node *tmp;
681 int dentry_count = 0;
683 LASSERT(inode != NULL);
685 ll_d_hlist_for_each(tmp, &inode->i_dentry)
688 CERROR("%s: inode %p dump: dev=%s fid="DFID
689 " mode=%o count=%u, %d dentries\n",
690 ll_get_fsname(inode->i_sb, NULL, 0), inode,
691 ll_i2mdexp(inode)->exp_obd->obd_name, PFID(ll_inode2fid(inode)),
692 inode->i_mode, atomic_read(&inode->i_count), dentry_count);
695 void lustre_dump_dentry(struct dentry *dentry, int recur)
697 struct list_head *tmp;
700 LASSERT(dentry != NULL);
702 list_for_each(tmp, &dentry->d_subdirs)
705 CERROR("dentry %p dump: name=%.*s parent=%.*s (%p), inode=%p, count=%u,"
706 " flags=0x%x, fsdata=%p, %d subdirs\n", dentry,
707 dentry->d_name.len, dentry->d_name.name,
708 dentry->d_parent->d_name.len, dentry->d_parent->d_name.name,
709 dentry->d_parent, dentry->d_inode, ll_d_count(dentry),
710 dentry->d_flags, dentry->d_fsdata, subdirs);
711 if (dentry->d_inode != NULL)
712 ll_dump_inode(dentry->d_inode);
717 list_for_each(tmp, &dentry->d_subdirs) {
718 struct dentry *d = list_entry(tmp, struct dentry, d_child);
719 lustre_dump_dentry(d, recur - 1);
723 static void client_common_put_super(struct super_block *sb)
725 struct ll_sb_info *sbi = ll_s2sbi(sb);
728 #ifdef CONFIG_FS_POSIX_ACL
729 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
730 et_fini(&sbi->ll_et);
731 rct_fini(&sbi->ll_rct);
737 list_del(&sbi->ll_conn_chain);
739 obd_fid_fini(sbi->ll_dt_exp->exp_obd);
740 obd_disconnect(sbi->ll_dt_exp);
741 sbi->ll_dt_exp = NULL;
743 lprocfs_unregister_mountpoint(sbi);
745 obd_fid_fini(sbi->ll_md_exp->exp_obd);
746 obd_disconnect(sbi->ll_md_exp);
747 sbi->ll_md_exp = NULL;
752 void ll_kill_super(struct super_block *sb)
754 struct ll_sb_info *sbi;
758 if (!(sb->s_flags & MS_ACTIVE))
762 /* we need restore s_dev from changed for clustred NFS before put_super
763 * because new kernels have cached s_dev and change sb->s_dev in
764 * put_super not affected real removing devices */
766 sb->s_dev = sbi->ll_sdev_orig;
767 sbi->ll_umounting = 1;
769 /* wait running statahead threads to quit */
770 while (atomic_read(&sbi->ll_sa_running) > 0) {
771 set_current_state(TASK_UNINTERRUPTIBLE);
772 schedule_timeout(msecs_to_jiffies(MSEC_PER_SEC >> 3));
779 static inline int ll_set_opt(const char *opt, char *data, int fl)
781 if (strncmp(opt, data, strlen(opt)) != 0)
787 /* non-client-specific mount options are parsed in lmd_parse */
788 static int ll_options(char *options, int *flags)
791 char *s1 = options, *s2;
797 CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
800 CDEBUG(D_SUPER, "next opt=%s\n", s1);
801 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
806 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
811 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
816 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
821 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
826 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
831 tmp = ll_set_opt("context", s1, 1);
834 tmp = ll_set_opt("fscontext", s1, 1);
837 tmp = ll_set_opt("defcontext", s1, 1);
840 tmp = ll_set_opt("rootcontext", s1, 1);
843 tmp = ll_set_opt("remote_client", s1, LL_SBI_RMT_CLIENT);
848 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
853 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
859 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
864 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
869 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
874 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
879 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
884 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
889 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
894 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
899 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
904 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
910 s2 = strchr(s1, ',');
918 void ll_lli_init(struct ll_inode_info *lli)
920 lli->lli_inode_magic = LLI_INODE_MAGIC;
922 spin_lock_init(&lli->lli_lock);
923 lli->lli_posix_acl = NULL;
924 lli->lli_remote_perms = NULL;
925 mutex_init(&lli->lli_rmtperm_mutex);
926 /* Do not set lli_fid, it has been initialized already. */
927 fid_zero(&lli->lli_pfid);
928 atomic_set(&lli->lli_open_count, 0);
929 lli->lli_rmtperm_time = 0;
930 lli->lli_mds_read_och = NULL;
931 lli->lli_mds_write_och = NULL;
932 lli->lli_mds_exec_och = NULL;
933 lli->lli_open_fd_read_count = 0;
934 lli->lli_open_fd_write_count = 0;
935 lli->lli_open_fd_exec_count = 0;
936 mutex_init(&lli->lli_och_mutex);
937 spin_lock_init(&lli->lli_agl_lock);
938 spin_lock_init(&lli->lli_layout_lock);
939 ll_layout_version_set(lli, CL_LAYOUT_GEN_NONE);
940 lli->lli_clob = NULL;
942 init_rwsem(&lli->lli_xattrs_list_rwsem);
943 mutex_init(&lli->lli_xattrs_enq_lock);
945 LASSERT(lli->lli_vfs_inode.i_mode != 0);
946 if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
947 mutex_init(&lli->lli_readdir_mutex);
948 lli->lli_opendir_key = NULL;
950 spin_lock_init(&lli->lli_sa_lock);
951 lli->lli_opendir_pid = 0;
952 lli->lli_sa_enabled = 0;
953 lli->lli_def_stripe_offset = -1;
955 mutex_init(&lli->lli_size_mutex);
956 lli->lli_symlink_name = NULL;
957 init_rwsem(&lli->lli_trunc_sem);
958 range_lock_tree_init(&lli->lli_write_tree);
959 init_rwsem(&lli->lli_glimpse_sem);
960 lli->lli_glimpse_time = 0;
961 INIT_LIST_HEAD(&lli->lli_agl_list);
962 lli->lli_agl_index = 0;
963 lli->lli_async_rc = 0;
965 mutex_init(&lli->lli_layout_mutex);
968 static inline int ll_bdi_register(struct backing_dev_info *bdi)
970 static atomic_t ll_bdi_num = ATOMIC_INIT(0);
972 bdi->name = "lustre";
973 return bdi_register(bdi, NULL, "lustre-%d",
974 atomic_inc_return(&ll_bdi_num));
977 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
979 struct lustre_profile *lprof = NULL;
980 struct lustre_sb_info *lsi = s2lsi(sb);
981 struct ll_sb_info *sbi;
982 char *dt = NULL, *md = NULL;
983 char *profilenm = get_profile_name(sb);
984 struct config_llog_instance *cfg;
985 /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
986 const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
990 CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
996 try_module_get(THIS_MODULE);
998 /* client additional sb info */
999 lsi->lsi_llsbi = sbi = ll_init_sbi();
1001 module_put(THIS_MODULE);
1006 err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
1008 GOTO(out_free, err);
1010 err = bdi_init(&lsi->lsi_bdi);
1012 GOTO(out_free, err);
1013 lsi->lsi_flags |= LSI_BDI_INITIALIZED;
1014 #ifdef HAVE_BDI_CAP_MAP_COPY
1015 lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
1017 lsi->lsi_bdi.capabilities = 0;
1019 err = ll_bdi_register(&lsi->lsi_bdi);
1021 GOTO(out_free, err);
1023 sb->s_bdi = &lsi->lsi_bdi;
1024 #ifndef HAVE_DCACHE_LOCK
1025 /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
1026 sb->s_d_op = &ll_d_ops;
1029 /* Generate a string unique to this super, in case some joker tries
1030 to mount the same fs at two mount points.
1031 Use the address of the super itself.*/
1032 cfg->cfg_instance = sb;
1033 cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
1034 cfg->cfg_callback = class_config_llog_handler;
1035 /* set up client obds */
1036 err = lustre_process_log(sb, profilenm, cfg);
1038 GOTO(out_free, err);
1040 /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1041 lprof = class_get_profile(profilenm);
1042 if (lprof == NULL) {
1043 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1044 " read from the MGS. Does that filesystem "
1045 "exist?\n", profilenm);
1046 GOTO(out_free, err = -EINVAL);
1048 CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1049 lprof->lp_md, lprof->lp_dt);
1051 OBD_ALLOC(dt, strlen(lprof->lp_dt) + instlen + 2);
1053 GOTO(out_free, err = -ENOMEM);
1054 sprintf(dt, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
1056 OBD_ALLOC(md, strlen(lprof->lp_md) + instlen + 2);
1058 GOTO(out_free, err = -ENOMEM);
1059 sprintf(md, "%s-%p", lprof->lp_md, cfg->cfg_instance);
1061 /* connections, registrations, sb setup */
1062 err = client_common_fill_super(sb, md, dt, mnt);
1064 GOTO(out_free, err);
1066 sbi->ll_client_common_fill_super_succeeded = 1;
1070 OBD_FREE(md, strlen(lprof->lp_md) + instlen + 2);
1072 OBD_FREE(dt, strlen(lprof->lp_dt) + instlen + 2);
1074 class_put_profile(lprof);
1077 else if (sbi->ll_flags & LL_SBI_VERBOSE)
1078 LCONSOLE_WARN("Mounted %s\n", profilenm);
1082 } /* ll_fill_super */
1084 void ll_put_super(struct super_block *sb)
1086 struct config_llog_instance cfg, params_cfg;
1087 struct obd_device *obd;
1088 struct lustre_sb_info *lsi = s2lsi(sb);
1089 struct ll_sb_info *sbi = ll_s2sbi(sb);
1090 char *profilenm = get_profile_name(sb);
1092 int next, force = 1, rc = 0;
1095 CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1097 cfg.cfg_instance = sb;
1098 lustre_end_log(sb, profilenm, &cfg);
1100 params_cfg.cfg_instance = sb;
1101 lustre_end_log(sb, PARAMS_FILENAME, ¶ms_cfg);
1103 if (sbi->ll_md_exp) {
1104 obd = class_exp2obd(sbi->ll_md_exp);
1106 force = obd->obd_force;
1109 /* Wait for unstable pages to be committed to stable storage */
1111 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
1112 rc = l_wait_event(sbi->ll_cache->ccc_unstable_waitq,
1113 atomic_long_read(&sbi->ll_cache->ccc_unstable_nr) == 0,
1117 ccc_count = atomic_long_read(&sbi->ll_cache->ccc_unstable_nr);
1118 if (force == 0 && rc != -EINTR)
1119 LASSERTF(ccc_count == 0, "count: %li\n", ccc_count);
1122 /* We need to set force before the lov_disconnect in
1123 lustre_common_put_super, since l_d cleans up osc's as well. */
1126 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1128 obd->obd_force = force;
1132 if (sbi->ll_client_common_fill_super_succeeded) {
1133 /* Only if client_common_fill_super succeeded */
1134 client_common_put_super(sb);
1138 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1139 class_manual_cleanup(obd);
1142 if (sbi->ll_flags & LL_SBI_VERBOSE)
1143 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1146 class_del_profile(profilenm);
1148 if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1149 bdi_destroy(&lsi->lsi_bdi);
1150 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1154 lsi->lsi_llsbi = NULL;
1156 lustre_common_put_super(sb);
1158 cl_env_cache_purge(~0);
1160 module_put(THIS_MODULE);
1163 } /* client_put_super */
1165 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1167 struct inode *inode = NULL;
1169 /* NOTE: we depend on atomic igrab() -bzzz */
1170 lock_res_and_lock(lock);
1171 if (lock->l_resource->lr_lvb_inode) {
1172 struct ll_inode_info * lli;
1173 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1174 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1175 inode = igrab(lock->l_resource->lr_lvb_inode);
1177 inode = lock->l_resource->lr_lvb_inode;
1178 LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ? D_INFO :
1179 D_WARNING, lock, "lr_lvb_inode %p is "
1180 "bogus: magic %08x",
1181 lock->l_resource->lr_lvb_inode,
1182 lli->lli_inode_magic);
1186 unlock_res_and_lock(lock);
1190 static void ll_dir_clear_lsm_md(struct inode *inode)
1192 struct ll_inode_info *lli = ll_i2info(inode);
1194 LASSERT(S_ISDIR(inode->i_mode));
1196 if (lli->lli_lsm_md != NULL) {
1197 lmv_free_memmd(lli->lli_lsm_md);
1198 lli->lli_lsm_md = NULL;
1202 static struct inode *ll_iget_anon_dir(struct super_block *sb,
1203 const struct lu_fid *fid,
1204 struct lustre_md *md)
1206 struct ll_sb_info *sbi = ll_s2sbi(sb);
1207 struct mdt_body *body = md->body;
1208 struct inode *inode;
1212 ino = cl_fid_build_ino(fid, sbi->ll_flags & LL_SBI_32BIT_API);
1213 inode = iget_locked(sb, ino);
1214 if (inode == NULL) {
1215 CERROR("%s: failed get simple inode "DFID": rc = -ENOENT\n",
1216 ll_get_fsname(sb, NULL, 0), PFID(fid));
1217 RETURN(ERR_PTR(-ENOENT));
1220 if (inode->i_state & I_NEW) {
1221 struct ll_inode_info *lli = ll_i2info(inode);
1222 struct lmv_stripe_md *lsm = md->lmv;
1224 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1225 (body->mbo_mode & S_IFMT);
1226 LASSERTF(S_ISDIR(inode->i_mode), "Not slave inode "DFID"\n",
1229 LTIME_S(inode->i_mtime) = 0;
1230 LTIME_S(inode->i_atime) = 0;
1231 LTIME_S(inode->i_ctime) = 0;
1234 #ifdef HAVE_BACKING_DEV_INFO
1235 /* initializing backing dev info. */
1236 inode->i_mapping->backing_dev_info =
1237 &s2lsi(inode->i_sb)->lsi_bdi;
1239 inode->i_op = &ll_dir_inode_operations;
1240 inode->i_fop = &ll_dir_operations;
1241 lli->lli_fid = *fid;
1244 LASSERT(lsm != NULL);
1245 /* master object FID */
1246 lli->lli_pfid = body->mbo_fid1;
1247 CDEBUG(D_INODE, "lli %p slave "DFID" master "DFID"\n",
1248 lli, PFID(fid), PFID(&lli->lli_pfid));
1249 unlock_new_inode(inode);
1255 static int ll_init_lsm_md(struct inode *inode, struct lustre_md *md)
1258 struct lmv_stripe_md *lsm = md->lmv;
1261 LASSERT(lsm != NULL);
1262 /* XXX sigh, this lsm_root initialization should be in
1263 * LMV layer, but it needs ll_iget right now, so we
1264 * put this here right now. */
1265 for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
1266 fid = &lsm->lsm_md_oinfo[i].lmo_fid;
1267 LASSERT(lsm->lsm_md_oinfo[i].lmo_root == NULL);
1268 /* Unfortunately ll_iget will call ll_update_inode,
1269 * where the initialization of slave inode is slightly
1270 * different, so it reset lsm_md to NULL to avoid
1271 * initializing lsm for slave inode. */
1272 /* For migrating inode, master stripe and master object will
1273 * be same, so we only need assign this inode */
1274 if (lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION && i == 0)
1275 lsm->lsm_md_oinfo[i].lmo_root = inode;
1277 lsm->lsm_md_oinfo[i].lmo_root =
1278 ll_iget_anon_dir(inode->i_sb, fid, md);
1280 if (IS_ERR(lsm->lsm_md_oinfo[i].lmo_root)) {
1281 int rc = PTR_ERR(lsm->lsm_md_oinfo[i].lmo_root);
1283 lsm->lsm_md_oinfo[i].lmo_root = NULL;
1291 static inline int lli_lsm_md_eq(const struct lmv_stripe_md *lsm_md1,
1292 const struct lmv_stripe_md *lsm_md2)
1294 return lsm_md1->lsm_md_magic == lsm_md2->lsm_md_magic &&
1295 lsm_md1->lsm_md_stripe_count == lsm_md2->lsm_md_stripe_count &&
1296 lsm_md1->lsm_md_master_mdt_index ==
1297 lsm_md2->lsm_md_master_mdt_index &&
1298 lsm_md1->lsm_md_hash_type == lsm_md2->lsm_md_hash_type &&
1299 lsm_md1->lsm_md_layout_version ==
1300 lsm_md2->lsm_md_layout_version &&
1301 strcmp(lsm_md1->lsm_md_pool_name,
1302 lsm_md2->lsm_md_pool_name) == 0;
1305 static int ll_update_lsm_md(struct inode *inode, struct lustre_md *md)
1307 struct ll_inode_info *lli = ll_i2info(inode);
1308 struct lmv_stripe_md *lsm = md->lmv;
1312 LASSERT(S_ISDIR(inode->i_mode));
1313 CDEBUG(D_INODE, "update lsm %p of "DFID"\n", lli->lli_lsm_md,
1314 PFID(ll_inode2fid(inode)));
1316 /* no striped information from request. */
1318 if (lli->lli_lsm_md == NULL) {
1320 } else if (lli->lli_lsm_md->lsm_md_hash_type &
1321 LMV_HASH_FLAG_MIGRATION) {
1322 /* migration is done, the temporay MIGRATE layout has
1324 CDEBUG(D_INODE, DFID" finish migration.\n",
1325 PFID(ll_inode2fid(inode)));
1326 lmv_free_memmd(lli->lli_lsm_md);
1327 lli->lli_lsm_md = NULL;
1330 /* The lustre_md from req does not include stripeEA,
1331 * see ll_md_setattr */
1336 /* set the directory layout */
1337 if (lli->lli_lsm_md == NULL) {
1338 struct cl_attr *attr;
1340 rc = ll_init_lsm_md(inode, md);
1344 /* set md->lmv to NULL, so the following free lustre_md
1345 * will not free this lsm */
1347 lli->lli_lsm_md = lsm;
1349 OBD_ALLOC_PTR(attr);
1353 /* validate the lsm */
1354 rc = md_merge_attr(ll_i2mdexp(inode), lsm, attr,
1355 ll_md_blocking_ast);
1361 if (md->body->mbo_valid & OBD_MD_FLNLINK)
1362 md->body->mbo_nlink = attr->cat_nlink;
1363 if (md->body->mbo_valid & OBD_MD_FLSIZE)
1364 md->body->mbo_size = attr->cat_size;
1365 if (md->body->mbo_valid & OBD_MD_FLATIME)
1366 md->body->mbo_atime = attr->cat_atime;
1367 if (md->body->mbo_valid & OBD_MD_FLCTIME)
1368 md->body->mbo_ctime = attr->cat_ctime;
1369 if (md->body->mbo_valid & OBD_MD_FLMTIME)
1370 md->body->mbo_mtime = attr->cat_mtime;
1374 CDEBUG(D_INODE, "Set lsm %p magic %x to "DFID"\n", lsm,
1375 lsm->lsm_md_magic, PFID(ll_inode2fid(inode)));
1379 /* Compare the old and new stripe information */
1380 if (!lsm_md_eq(lli->lli_lsm_md, lsm)) {
1381 struct lmv_stripe_md *old_lsm = lli->lli_lsm_md;
1384 CERROR("%s: inode "DFID"(%p)'s lmv layout mismatch (%p)/(%p)"
1385 "magic:0x%x/0x%x stripe count: %d/%d master_mdt: %d/%d"
1386 "hash_type:0x%x/0x%x layout: 0x%x/0x%x pool:%s/%s\n",
1387 ll_get_fsname(inode->i_sb, NULL, 0), PFID(&lli->lli_fid),
1388 inode, lsm, old_lsm,
1389 lsm->lsm_md_magic, old_lsm->lsm_md_magic,
1390 lsm->lsm_md_stripe_count,
1391 old_lsm->lsm_md_stripe_count,
1392 lsm->lsm_md_master_mdt_index,
1393 old_lsm->lsm_md_master_mdt_index,
1394 lsm->lsm_md_hash_type, old_lsm->lsm_md_hash_type,
1395 lsm->lsm_md_layout_version,
1396 old_lsm->lsm_md_layout_version,
1397 lsm->lsm_md_pool_name,
1398 old_lsm->lsm_md_pool_name);
1400 for (idx = 0; idx < old_lsm->lsm_md_stripe_count; idx++) {
1401 CERROR("%s: sub FIDs in old lsm idx %d, old: "DFID"\n",
1402 ll_get_fsname(inode->i_sb, NULL, 0), idx,
1403 PFID(&old_lsm->lsm_md_oinfo[idx].lmo_fid));
1406 for (idx = 0; idx < lsm->lsm_md_stripe_count; idx++) {
1407 CERROR("%s: sub FIDs in new lsm idx %d, new: "DFID"\n",
1408 ll_get_fsname(inode->i_sb, NULL, 0), idx,
1409 PFID(&lsm->lsm_md_oinfo[idx].lmo_fid));
1418 void ll_clear_inode(struct inode *inode)
1420 struct ll_inode_info *lli = ll_i2info(inode);
1421 struct ll_sb_info *sbi = ll_i2sbi(inode);
1424 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1425 PFID(ll_inode2fid(inode)), inode);
1427 if (S_ISDIR(inode->i_mode)) {
1428 /* these should have been cleared in ll_file_release */
1429 LASSERT(lli->lli_opendir_key == NULL);
1430 LASSERT(lli->lli_sai == NULL);
1431 LASSERT(lli->lli_opendir_pid == 0);
1434 md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1436 LASSERT(!lli->lli_open_fd_write_count);
1437 LASSERT(!lli->lli_open_fd_read_count);
1438 LASSERT(!lli->lli_open_fd_exec_count);
1440 if (lli->lli_mds_write_och)
1441 ll_md_real_close(inode, FMODE_WRITE);
1442 if (lli->lli_mds_exec_och)
1443 ll_md_real_close(inode, FMODE_EXEC);
1444 if (lli->lli_mds_read_och)
1445 ll_md_real_close(inode, FMODE_READ);
1447 if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1448 OBD_FREE(lli->lli_symlink_name,
1449 strlen(lli->lli_symlink_name) + 1);
1450 lli->lli_symlink_name = NULL;
1453 ll_xattr_cache_destroy(inode);
1455 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1456 LASSERT(lli->lli_posix_acl == NULL);
1457 if (lli->lli_remote_perms) {
1458 free_rmtperm_hash(lli->lli_remote_perms);
1459 lli->lli_remote_perms = NULL;
1462 #ifdef CONFIG_FS_POSIX_ACL
1463 else if (lli->lli_posix_acl) {
1464 LASSERT(atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1465 LASSERT(lli->lli_remote_perms == NULL);
1466 posix_acl_release(lli->lli_posix_acl);
1467 lli->lli_posix_acl = NULL;
1470 lli->lli_inode_magic = LLI_INODE_DEAD;
1472 if (S_ISDIR(inode->i_mode))
1473 ll_dir_clear_lsm_md(inode);
1474 else if (S_ISREG(inode->i_mode) && !is_bad_inode(inode))
1475 LASSERT(list_empty(&lli->lli_agl_list));
1478 * XXX This has to be done before lsm is freed below, because
1479 * cl_object still uses inode lsm.
1481 cl_inode_fini(inode);
1486 static int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data)
1488 struct lustre_md md;
1489 struct inode *inode = dentry->d_inode;
1490 struct ll_sb_info *sbi = ll_i2sbi(inode);
1491 struct ptlrpc_request *request = NULL;
1495 op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1496 LUSTRE_OPC_ANY, NULL);
1497 if (IS_ERR(op_data))
1498 RETURN(PTR_ERR(op_data));
1500 rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &request);
1502 ptlrpc_req_finished(request);
1503 if (rc == -ENOENT) {
1505 /* Unlinked special device node? Or just a race?
1506 * Pretend we done everything. */
1507 if (!S_ISREG(inode->i_mode) &&
1508 !S_ISDIR(inode->i_mode)) {
1509 ia_valid = op_data->op_attr.ia_valid;
1510 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1511 rc = simple_setattr(dentry, &op_data->op_attr);
1512 op_data->op_attr.ia_valid = ia_valid;
1514 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1515 CERROR("md_setattr fails: rc = %d\n", rc);
1520 rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1521 sbi->ll_md_exp, &md);
1523 ptlrpc_req_finished(request);
1527 ia_valid = op_data->op_attr.ia_valid;
1528 /* inode size will be in ll_setattr_ost, can't do it now since dirty
1529 * cache is not cleared yet. */
1530 op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1531 if (S_ISREG(inode->i_mode))
1532 mutex_lock(&inode->i_mutex);
1533 rc = simple_setattr(dentry, &op_data->op_attr);
1534 if (S_ISREG(inode->i_mode))
1535 mutex_unlock(&inode->i_mutex);
1536 op_data->op_attr.ia_valid = ia_valid;
1538 rc = ll_update_inode(inode, &md);
1539 ptlrpc_req_finished(request);
1544 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1545 * object(s) determine the file size and mtime. Otherwise, the MDS will
1546 * keep these values until such a time that objects are allocated for it.
1547 * We do the MDS operations first, as it is checking permissions for us.
1548 * We don't to the MDS RPC if there is nothing that we want to store there,
1549 * otherwise there is no harm in updating mtime/atime on the MDS if we are
1550 * going to do an RPC anyways.
1552 * If we are doing a truncate, we will send the mtime and ctime updates
1553 * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1554 * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1557 * In case of HSMimport, we only set attr on MDS.
1559 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr, bool hsm_import)
1561 struct inode *inode = dentry->d_inode;
1562 struct ll_inode_info *lli = ll_i2info(inode);
1563 struct md_op_data *op_data = NULL;
1567 CDEBUG(D_VFSTRACE, "%s: setattr inode "DFID"(%p) from %llu to %llu, "
1568 "valid %x, hsm_import %d\n",
1569 ll_get_fsname(inode->i_sb, NULL, 0), PFID(&lli->lli_fid),
1570 inode, i_size_read(inode), attr->ia_size, attr->ia_valid,
1573 if (attr->ia_valid & ATTR_SIZE) {
1574 /* Check new size against VFS/VM file size limit and rlimit */
1575 rc = inode_newsize_ok(inode, attr->ia_size);
1579 /* The maximum Lustre file size is variable, based on the
1580 * OST maximum object size and number of stripes. This
1581 * needs another check in addition to the VFS check above. */
1582 if (attr->ia_size > ll_file_maxbytes(inode)) {
1583 CDEBUG(D_INODE,"file "DFID" too large %llu > "LPU64"\n",
1584 PFID(&lli->lli_fid), attr->ia_size,
1585 ll_file_maxbytes(inode));
1589 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1592 /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1593 if (attr->ia_valid & TIMES_SET_FLAGS) {
1594 if ((!uid_eq(current_fsuid(), inode->i_uid)) &&
1595 !cfs_capable(CFS_CAP_FOWNER))
1599 /* We mark all of the fields "set" so MDS/OST does not re-set them */
1600 if (!(attr->ia_valid & ATTR_CTIME_SET) &&
1601 (attr->ia_valid & ATTR_CTIME)) {
1602 attr->ia_ctime = CFS_CURRENT_TIME;
1603 attr->ia_valid |= ATTR_CTIME_SET;
1605 if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1606 (attr->ia_valid & ATTR_ATIME)) {
1607 attr->ia_atime = CFS_CURRENT_TIME;
1608 attr->ia_valid |= ATTR_ATIME_SET;
1610 if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1611 (attr->ia_valid & ATTR_MTIME)) {
1612 attr->ia_mtime = CFS_CURRENT_TIME;
1613 attr->ia_valid |= ATTR_MTIME_SET;
1616 if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1617 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %lu\n",
1618 LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1619 cfs_time_current_sec());
1621 if (S_ISREG(inode->i_mode)) {
1622 if (attr->ia_valid & ATTR_SIZE)
1623 inode_dio_write_done(inode);
1624 mutex_unlock(&inode->i_mutex);
1627 /* We always do an MDS RPC, even if we're only changing the size;
1628 * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1630 OBD_ALLOC_PTR(op_data);
1631 if (op_data == NULL)
1632 GOTO(out, rc = -ENOMEM);
1634 if (!hsm_import && attr->ia_valid & ATTR_SIZE) {
1635 /* If we are changing file size, file content is
1636 * modified, flag it. */
1637 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1638 op_data->op_bias |= MDS_DATA_MODIFIED;
1639 ll_file_clear_flag(lli, LLIF_DATA_MODIFIED);
1642 op_data->op_attr = *attr;
1644 rc = ll_md_setattr(dentry, op_data);
1648 if (!S_ISREG(inode->i_mode) || hsm_import)
1651 if (attr->ia_valid & (ATTR_SIZE |
1652 ATTR_ATIME | ATTR_ATIME_SET |
1653 ATTR_MTIME | ATTR_MTIME_SET |
1654 ATTR_CTIME | ATTR_CTIME_SET)) {
1655 /* For truncate and utimes sending attributes to OSTs, setting
1656 * mtime/atime to the past will be performed under PW [0:EOF]
1657 * extent lock (new_size:EOF for truncate). It may seem
1658 * excessive to send mtime/atime updates to OSTs when not
1659 * setting times to past, but it is necessary due to possible
1660 * time de-synchronization between MDT inode and OST objects */
1661 rc = cl_setattr_ost(lli->lli_clob, attr, 0);
1664 /* If the file was restored, it needs to set dirty flag.
1666 * We've already sent MDS_DATA_MODIFIED flag in
1667 * ll_md_setattr() for truncate. However, the MDT refuses to
1668 * set the HS_DIRTY flag on released files, so we have to set
1669 * it again if the file has been restored. Please check how
1670 * LLIF_DATA_MODIFIED is set in vvp_io_setattr_fini().
1672 * Please notice that if the file is not released, the previous
1673 * MDS_DATA_MODIFIED has taken effect and usually
1674 * LLIF_DATA_MODIFIED is not set(see vvp_io_setattr_fini()).
1675 * This way we can save an RPC for common open + trunc
1677 if (ll_file_test_and_clear_flag(lli, LLIF_DATA_MODIFIED)) {
1678 struct hsm_state_set hss = {
1679 .hss_valid = HSS_SETMASK,
1680 .hss_setmask = HS_DIRTY,
1684 rc2 = ll_hsm_state_set(inode, &hss);
1685 /* truncate and write can happen at the same time, so that
1686 * the file can be set modified even though the file is not
1687 * restored from released state, and ll_hsm_state_set() is
1688 * not applicable for the file, and rc2 < 0 is normal in this
1691 CDEBUG(D_INFO, DFID "HSM set dirty failed: rc2 = %d\n",
1692 PFID(ll_inode2fid(inode)), rc2);
1697 if (op_data != NULL)
1698 ll_finish_md_op_data(op_data);
1700 if (S_ISREG(inode->i_mode)) {
1701 mutex_lock(&inode->i_mutex);
1702 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1703 inode_dio_wait(inode);
1706 ll_stats_ops_tally(ll_i2sbi(inode), (attr->ia_valid & ATTR_SIZE) ?
1707 LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1712 int ll_setattr(struct dentry *de, struct iattr *attr)
1714 int mode = de->d_inode->i_mode;
1716 if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1717 (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1718 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1720 if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1721 (ATTR_SIZE|ATTR_MODE)) &&
1722 (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1723 (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1724 !(attr->ia_mode & S_ISGID))))
1725 attr->ia_valid |= ATTR_FORCE;
1727 if ((attr->ia_valid & ATTR_MODE) &&
1729 !(attr->ia_mode & S_ISUID) &&
1730 !(attr->ia_valid & ATTR_KILL_SUID))
1731 attr->ia_valid |= ATTR_KILL_SUID;
1733 if ((attr->ia_valid & ATTR_MODE) &&
1734 ((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1735 !(attr->ia_mode & S_ISGID) &&
1736 !(attr->ia_valid & ATTR_KILL_SGID))
1737 attr->ia_valid |= ATTR_KILL_SGID;
1739 return ll_setattr_raw(de, attr, false);
1742 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1743 __u64 max_age, __u32 flags)
1745 struct ll_sb_info *sbi = ll_s2sbi(sb);
1746 struct obd_statfs obd_osfs;
1750 rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1752 CERROR("md_statfs fails: rc = %d\n", rc);
1756 osfs->os_type = sb->s_magic;
1758 CDEBUG(D_SUPER, "MDC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1759 osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,osfs->os_files);
1761 if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1762 flags |= OBD_STATFS_NODELAY;
1764 rc = obd_statfs_rqset(sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1766 CERROR("obd_statfs fails: rc = %d\n", rc);
1770 CDEBUG(D_SUPER, "OSC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1771 obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1774 osfs->os_bsize = obd_osfs.os_bsize;
1775 osfs->os_blocks = obd_osfs.os_blocks;
1776 osfs->os_bfree = obd_osfs.os_bfree;
1777 osfs->os_bavail = obd_osfs.os_bavail;
1779 /* If we don't have as many objects free on the OST as inodes
1780 * on the MDS, we reduce the total number of inodes to
1781 * compensate, so that the "inodes in use" number is correct.
1783 if (obd_osfs.os_ffree < osfs->os_ffree) {
1784 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1786 osfs->os_ffree = obd_osfs.os_ffree;
1791 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1793 struct super_block *sb = de->d_sb;
1794 struct obd_statfs osfs;
1795 __u64 fsid = huge_encode_dev(sb->s_dev);
1798 CDEBUG(D_VFSTRACE, "VFS Op: at "LPU64" jiffies\n", get_jiffies_64());
1799 ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1801 /* Some amount of caching on the client is allowed */
1802 rc = ll_statfs_internal(sb, &osfs,
1803 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1808 statfs_unpack(sfs, &osfs);
1810 /* We need to downshift for all 32-bit kernels, because we can't
1811 * tell if the kernel is being called via sys_statfs64() or not.
1812 * Stop before overflowing f_bsize - in which case it is better
1813 * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1814 if (sizeof(long) < 8) {
1815 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1818 osfs.os_blocks >>= 1;
1819 osfs.os_bfree >>= 1;
1820 osfs.os_bavail >>= 1;
1824 sfs->f_blocks = osfs.os_blocks;
1825 sfs->f_bfree = osfs.os_bfree;
1826 sfs->f_bavail = osfs.os_bavail;
1827 sfs->f_fsid.val[0] = (__u32)fsid;
1828 sfs->f_fsid.val[1] = (__u32)(fsid >> 32);
1832 void ll_inode_size_lock(struct inode *inode)
1834 struct ll_inode_info *lli;
1836 LASSERT(!S_ISDIR(inode->i_mode));
1838 lli = ll_i2info(inode);
1839 mutex_lock(&lli->lli_size_mutex);
1842 void ll_inode_size_unlock(struct inode *inode)
1844 struct ll_inode_info *lli;
1846 lli = ll_i2info(inode);
1847 mutex_unlock(&lli->lli_size_mutex);
1850 int ll_update_inode(struct inode *inode, struct lustre_md *md)
1852 struct ll_inode_info *lli = ll_i2info(inode);
1853 struct mdt_body *body = md->body;
1854 struct ll_sb_info *sbi = ll_i2sbi(inode);
1856 if (body->mbo_valid & OBD_MD_FLEASIZE)
1857 cl_file_inode_init(inode, md);
1859 if (S_ISDIR(inode->i_mode)) {
1862 rc = ll_update_lsm_md(inode, md);
1867 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1868 if (body->mbo_valid & OBD_MD_FLRMTPERM)
1869 ll_update_remote_perm(inode, md->remote_perm);
1871 #ifdef CONFIG_FS_POSIX_ACL
1872 else if (body->mbo_valid & OBD_MD_FLACL) {
1873 spin_lock(&lli->lli_lock);
1874 if (lli->lli_posix_acl)
1875 posix_acl_release(lli->lli_posix_acl);
1876 lli->lli_posix_acl = md->posix_acl;
1877 spin_unlock(&lli->lli_lock);
1880 inode->i_ino = cl_fid_build_ino(&body->mbo_fid1,
1881 sbi->ll_flags & LL_SBI_32BIT_API);
1882 inode->i_generation = cl_fid_build_gen(&body->mbo_fid1);
1884 if (body->mbo_valid & OBD_MD_FLATIME) {
1885 if (body->mbo_atime > LTIME_S(inode->i_atime))
1886 LTIME_S(inode->i_atime) = body->mbo_atime;
1887 lli->lli_atime = body->mbo_atime;
1890 if (body->mbo_valid & OBD_MD_FLMTIME) {
1891 if (body->mbo_mtime > LTIME_S(inode->i_mtime)) {
1892 CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
1893 "to "LPU64"\n", inode->i_ino,
1894 LTIME_S(inode->i_mtime), body->mbo_mtime);
1895 LTIME_S(inode->i_mtime) = body->mbo_mtime;
1897 lli->lli_mtime = body->mbo_mtime;
1900 if (body->mbo_valid & OBD_MD_FLCTIME) {
1901 if (body->mbo_ctime > LTIME_S(inode->i_ctime))
1902 LTIME_S(inode->i_ctime) = body->mbo_ctime;
1903 lli->lli_ctime = body->mbo_ctime;
1906 if (body->mbo_valid & OBD_MD_FLMODE)
1907 inode->i_mode = (inode->i_mode & S_IFMT) |
1908 (body->mbo_mode & ~S_IFMT);
1910 if (body->mbo_valid & OBD_MD_FLTYPE)
1911 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1912 (body->mbo_mode & S_IFMT);
1914 LASSERT(inode->i_mode != 0);
1915 if (S_ISREG(inode->i_mode))
1916 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1,
1917 LL_MAX_BLKSIZE_BITS);
1919 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1921 if (body->mbo_valid & OBD_MD_FLUID)
1922 inode->i_uid = make_kuid(&init_user_ns, body->mbo_uid);
1923 if (body->mbo_valid & OBD_MD_FLGID)
1924 inode->i_gid = make_kgid(&init_user_ns, body->mbo_gid);
1925 if (body->mbo_valid & OBD_MD_FLFLAGS)
1926 inode->i_flags = ll_ext_to_inode_flags(body->mbo_flags);
1927 if (body->mbo_valid & OBD_MD_FLNLINK)
1928 set_nlink(inode, body->mbo_nlink);
1929 if (body->mbo_valid & OBD_MD_FLRDEV)
1930 inode->i_rdev = old_decode_dev(body->mbo_rdev);
1932 if (body->mbo_valid & OBD_MD_FLID) {
1933 /* FID shouldn't be changed! */
1934 if (fid_is_sane(&lli->lli_fid)) {
1935 LASSERTF(lu_fid_eq(&lli->lli_fid, &body->mbo_fid1),
1936 "Trying to change FID "DFID
1937 " to the "DFID", inode "DFID"(%p)\n",
1938 PFID(&lli->lli_fid), PFID(&body->mbo_fid1),
1939 PFID(ll_inode2fid(inode)), inode);
1941 lli->lli_fid = body->mbo_fid1;
1945 LASSERT(fid_seq(&lli->lli_fid) != 0);
1947 if (body->mbo_valid & OBD_MD_FLSIZE) {
1948 i_size_write(inode, body->mbo_size);
1950 CDEBUG(D_VFSTRACE, "inode="DFID", updating i_size %llu\n",
1951 PFID(ll_inode2fid(inode)),
1952 (unsigned long long)body->mbo_size);
1954 if (body->mbo_valid & OBD_MD_FLBLOCKS)
1955 inode->i_blocks = body->mbo_blocks;
1958 if (body->mbo_valid & OBD_MD_TSTATE) {
1959 /* Set LLIF_FILE_RESTORING if restore ongoing and
1960 * clear it when done to ensure to start again
1961 * glimpsing updated attrs
1963 if (body->mbo_t_state & MS_RESTORE)
1964 ll_file_set_flag(lli, LLIF_FILE_RESTORING);
1966 ll_file_clear_flag(lli, LLIF_FILE_RESTORING);
1972 int ll_read_inode2(struct inode *inode, void *opaque)
1974 struct lustre_md *md = opaque;
1975 struct ll_inode_info *lli = ll_i2info(inode);
1979 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1980 PFID(&lli->lli_fid), inode);
1982 /* Core attributes from the MDS first. This is a new inode, and
1983 * the VFS doesn't zero times in the core inode so we have to do
1984 * it ourselves. They will be overwritten by either MDS or OST
1985 * attributes - we just need to make sure they aren't newer. */
1986 LTIME_S(inode->i_mtime) = 0;
1987 LTIME_S(inode->i_atime) = 0;
1988 LTIME_S(inode->i_ctime) = 0;
1990 rc = ll_update_inode(inode, md);
1994 /* OIDEBUG(inode); */
1996 #ifdef HAVE_BACKING_DEV_INFO
1997 /* initializing backing dev info. */
1998 inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
2000 if (S_ISREG(inode->i_mode)) {
2001 struct ll_sb_info *sbi = ll_i2sbi(inode);
2002 inode->i_op = &ll_file_inode_operations;
2003 inode->i_fop = sbi->ll_fop;
2004 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
2006 } else if (S_ISDIR(inode->i_mode)) {
2007 inode->i_op = &ll_dir_inode_operations;
2008 inode->i_fop = &ll_dir_operations;
2010 } else if (S_ISLNK(inode->i_mode)) {
2011 inode->i_op = &ll_fast_symlink_inode_operations;
2014 inode->i_op = &ll_special_inode_operations;
2016 init_special_inode(inode, inode->i_mode,
2025 void ll_delete_inode(struct inode *inode)
2027 struct ll_inode_info *lli = ll_i2info(inode);
2030 if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
2031 /* It is last chance to write out dirty pages,
2032 * otherwise we may lose data while umount */
2033 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF, CL_FSYNC_LOCAL, 1);
2035 truncate_inode_pages_final(&inode->i_data);
2037 LASSERTF(inode->i_data.nrpages == 0, "inode="DFID"(%p) nrpages=%lu, "
2038 "see https://jira.hpdd.intel.com/browse/LU-118\n",
2039 PFID(ll_inode2fid(inode)), inode, inode->i_data.nrpages);
2041 #ifdef HAVE_SBOPS_EVICT_INODE
2042 ll_clear_inode(inode);
2049 int ll_iocontrol(struct inode *inode, struct file *file,
2050 unsigned int cmd, unsigned long arg)
2052 struct ll_sb_info *sbi = ll_i2sbi(inode);
2053 struct ptlrpc_request *req = NULL;
2058 case FSFILT_IOC_GETFLAGS: {
2059 struct mdt_body *body;
2060 struct md_op_data *op_data;
2062 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
2063 0, 0, LUSTRE_OPC_ANY,
2065 if (IS_ERR(op_data))
2066 RETURN(PTR_ERR(op_data));
2068 op_data->op_valid = OBD_MD_FLFLAGS;
2069 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
2070 ll_finish_md_op_data(op_data);
2072 CERROR("%s: failure inode "DFID": rc = %d\n",
2073 sbi->ll_md_exp->exp_obd->obd_name,
2074 PFID(ll_inode2fid(inode)), rc);
2078 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
2080 flags = body->mbo_flags;
2082 ptlrpc_req_finished(req);
2084 RETURN(put_user(flags, (int __user *)arg));
2086 case FSFILT_IOC_SETFLAGS: {
2088 struct md_op_data *op_data;
2089 struct cl_object *obj;
2091 if (get_user(flags, (int __user *)arg))
2094 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
2095 LUSTRE_OPC_ANY, NULL);
2096 if (IS_ERR(op_data))
2097 RETURN(PTR_ERR(op_data));
2099 op_data->op_attr_flags = flags;
2100 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
2101 rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &req);
2102 ll_finish_md_op_data(op_data);
2103 ptlrpc_req_finished(req);
2107 inode->i_flags = ll_ext_to_inode_flags(flags);
2109 obj = ll_i2info(inode)->lli_clob;
2113 OBD_ALLOC_PTR(attr);
2117 attr->ia_valid = ATTR_ATTR_FLAG;
2118 rc = cl_setattr_ost(obj, attr, flags);
2130 int ll_flush_ctx(struct inode *inode)
2132 struct ll_sb_info *sbi = ll_i2sbi(inode);
2134 CDEBUG(D_SEC, "flush context for user %d\n",
2135 from_kuid(&init_user_ns, current_uid()));
2137 obd_set_info_async(NULL, sbi->ll_md_exp,
2138 sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2140 obd_set_info_async(NULL, sbi->ll_dt_exp,
2141 sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2146 /* umount -f client means force down, don't save state */
2147 void ll_umount_begin(struct super_block *sb)
2149 struct ll_sb_info *sbi = ll_s2sbi(sb);
2150 struct obd_device *obd;
2151 struct obd_ioctl_data *ioc_data;
2154 CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2155 sb->s_count, atomic_read(&sb->s_active));
2157 obd = class_exp2obd(sbi->ll_md_exp);
2159 CERROR("Invalid MDC connection handle "LPX64"\n",
2160 sbi->ll_md_exp->exp_handle.h_cookie);
2166 obd = class_exp2obd(sbi->ll_dt_exp);
2168 CERROR("Invalid LOV connection handle "LPX64"\n",
2169 sbi->ll_dt_exp->exp_handle.h_cookie);
2175 OBD_ALLOC_PTR(ioc_data);
2177 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2178 sizeof *ioc_data, ioc_data, NULL);
2180 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2181 sizeof *ioc_data, ioc_data, NULL);
2183 OBD_FREE_PTR(ioc_data);
2186 /* Really, we'd like to wait until there are no requests outstanding,
2187 * and then continue. For now, we just invalidate the requests,
2188 * schedule() and sleep one second if needed, and hope.
2194 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2196 struct ll_sb_info *sbi = ll_s2sbi(sb);
2197 char *profilenm = get_profile_name(sb);
2201 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2202 read_only = *flags & MS_RDONLY;
2203 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2204 sizeof(KEY_READ_ONLY),
2205 KEY_READ_ONLY, sizeof(read_only),
2208 LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2209 profilenm, read_only ?
2210 "read-only" : "read-write", err);
2215 sb->s_flags |= MS_RDONLY;
2217 sb->s_flags &= ~MS_RDONLY;
2219 if (sbi->ll_flags & LL_SBI_VERBOSE)
2220 LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2221 read_only ? "read-only" : "read-write");
2227 * Cleanup the open handle that is cached on MDT-side.
2229 * For open case, the client side open handling thread may hit error
2230 * after the MDT grant the open. Under such case, the client should
2231 * send close RPC to the MDT as cleanup; otherwise, the open handle
2232 * on the MDT will be leaked there until the client umount or evicted.
2234 * In further, if someone unlinked the file, because the open handle
2235 * holds the reference on such file/object, then it will block the
2236 * subsequent threads that want to locate such object via FID.
2238 * \param[in] sb super block for this file-system
2239 * \param[in] open_req pointer to the original open request
2241 void ll_open_cleanup(struct super_block *sb, struct ptlrpc_request *open_req)
2243 struct mdt_body *body;
2244 struct md_op_data *op_data;
2245 struct ptlrpc_request *close_req = NULL;
2246 struct obd_export *exp = ll_s2sbi(sb)->ll_md_exp;
2249 body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
2250 OBD_ALLOC_PTR(op_data);
2251 if (op_data == NULL) {
2252 CWARN("%s: cannot allocate op_data to release open handle for "
2254 ll_get_fsname(sb, NULL, 0), PFID(&body->mbo_fid1));
2259 op_data->op_fid1 = body->mbo_fid1;
2260 op_data->op_handle = body->mbo_handle;
2261 op_data->op_mod_time = cfs_time_current_sec();
2262 md_close(exp, op_data, NULL, &close_req);
2263 ptlrpc_req_finished(close_req);
2264 ll_finish_md_op_data(op_data);
2269 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2270 struct super_block *sb, struct lookup_intent *it)
2272 struct ll_sb_info *sbi = NULL;
2273 struct lustre_md md = { NULL };
2277 LASSERT(*inode || sb);
2278 sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2279 rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2280 sbi->ll_md_exp, &md);
2285 rc = ll_update_inode(*inode, &md);
2289 LASSERT(sb != NULL);
2292 * At this point server returns to client's same fid as client
2293 * generated for creating. So using ->fid1 is okay here.
2295 LASSERT(fid_is_sane(&md.body->mbo_fid1));
2297 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->mbo_fid1,
2298 sbi->ll_flags & LL_SBI_32BIT_API),
2300 if (IS_ERR(*inode)) {
2301 #ifdef CONFIG_FS_POSIX_ACL
2303 posix_acl_release(md.posix_acl);
2304 md.posix_acl = NULL;
2307 rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2309 CERROR("new_inode -fatal: rc %d\n", rc);
2314 /* Handling piggyback layout lock.
2315 * Layout lock can be piggybacked by getattr and open request.
2316 * The lsm can be applied to inode only if it comes with a layout lock
2317 * otherwise correct layout may be overwritten, for example:
2318 * 1. proc1: mdt returns a lsm but not granting layout
2319 * 2. layout was changed by another client
2320 * 3. proc2: refresh layout and layout lock granted
2321 * 4. proc1: to apply a stale layout */
2322 if (it != NULL && it->d.lustre.it_lock_mode != 0) {
2323 struct lustre_handle lockh;
2324 struct ldlm_lock *lock;
2326 lockh.cookie = it->d.lustre.it_lock_handle;
2327 lock = ldlm_handle2lock(&lockh);
2328 LASSERT(lock != NULL);
2329 if (ldlm_has_layout(lock)) {
2330 struct cl_object_conf conf;
2332 memset(&conf, 0, sizeof(conf));
2333 conf.coc_opc = OBJECT_CONF_SET;
2334 conf.coc_inode = *inode;
2335 conf.coc_lock = lock;
2336 conf.u.coc_layout = md.layout;
2337 (void)ll_layout_conf(*inode, &conf);
2339 LDLM_LOCK_PUT(lock);
2345 md_free_lustre_md(sbi->ll_md_exp, &md);
2348 if (rc != 0 && it != NULL && it->it_op & IT_OPEN)
2349 ll_open_cleanup(sb != NULL ? sb : (*inode)->i_sb, req);
2354 int ll_obd_statfs(struct inode *inode, void __user *arg)
2356 struct ll_sb_info *sbi = NULL;
2357 struct obd_export *exp;
2359 struct obd_ioctl_data *data = NULL;
2361 __u32 __user flags; /* not user, but obd_iocontrol is abused */
2364 if (!inode || !(sbi = ll_i2sbi(inode)))
2365 GOTO(out_statfs, rc = -EINVAL);
2367 rc = obd_ioctl_getdata(&buf, &len, arg);
2369 GOTO(out_statfs, rc);
2372 if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2373 !data->ioc_pbuf1 || !data->ioc_pbuf2)
2374 GOTO(out_statfs, rc = -EINVAL);
2376 if (data->ioc_inllen1 != sizeof(__u32) ||
2377 data->ioc_inllen2 != sizeof(__u32) ||
2378 data->ioc_plen1 != sizeof(struct obd_statfs) ||
2379 data->ioc_plen2 != sizeof(struct obd_uuid))
2380 GOTO(out_statfs, rc = -EINVAL);
2382 memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2383 if (type & LL_STATFS_LMV)
2384 exp = sbi->ll_md_exp;
2385 else if (type & LL_STATFS_LOV)
2386 exp = sbi->ll_dt_exp;
2388 GOTO(out_statfs, rc = -ENODEV);
2390 flags = (type & LL_STATFS_NODELAY) ? OBD_STATFS_NODELAY : 0;
2391 rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, &flags);
2393 GOTO(out_statfs, rc);
2396 obd_ioctl_freedata(buf, len);
2400 int ll_process_config(struct lustre_cfg *lcfg)
2402 struct super_block *sb;
2407 /* The instance name contains the sb: lustre-client-aacfe000 */
2408 ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2409 if (!ptr || !*(++ptr))
2411 if (sscanf(ptr, "%lx", &x) != 1)
2413 sb = (struct super_block *)x;
2414 /* This better be a real Lustre superblock! */
2415 LASSERT(s2lsi(sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2417 /* Note we have not called client_common_fill_super yet, so
2418 proc fns must be able to handle that! */
2419 rc = class_process_proc_param(PARAM_LLITE, lprocfs_llite_obd_vars,
2426 /* this function prepares md_op_data hint for passing it down to MD stack. */
2427 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
2428 struct inode *i1, struct inode *i2,
2429 const char *name, size_t namelen,
2430 __u32 mode, __u32 opc, void *data)
2432 LASSERT(i1 != NULL);
2435 /* Do not reuse namelen for something else. */
2437 return ERR_PTR(-EINVAL);
2439 if (namelen > ll_i2sbi(i1)->ll_namelen)
2440 return ERR_PTR(-ENAMETOOLONG);
2442 if (!lu_name_is_valid_2(name, namelen))
2443 return ERR_PTR(-EINVAL);
2446 if (op_data == NULL)
2447 OBD_ALLOC_PTR(op_data);
2449 if (op_data == NULL)
2450 return ERR_PTR(-ENOMEM);
2452 ll_i2gids(op_data->op_suppgids, i1, i2);
2453 op_data->op_fid1 = *ll_inode2fid(i1);
2454 op_data->op_default_stripe_offset = -1;
2455 if (S_ISDIR(i1->i_mode)) {
2456 op_data->op_mea1 = ll_i2info(i1)->lli_lsm_md;
2457 if (opc == LUSTRE_OPC_MKDIR)
2458 op_data->op_default_stripe_offset =
2459 ll_i2info(i1)->lli_def_stripe_offset;
2463 op_data->op_fid2 = *ll_inode2fid(i2);
2464 if (S_ISDIR(i2->i_mode))
2465 op_data->op_mea2 = ll_i2info(i2)->lli_lsm_md;
2467 fid_zero(&op_data->op_fid2);
2470 if (ll_i2sbi(i1)->ll_flags & LL_SBI_64BIT_HASH)
2471 op_data->op_cli_flags |= CLI_HASH64;
2473 if (ll_need_32bit_api(ll_i2sbi(i1)))
2474 op_data->op_cli_flags |= CLI_API32;
2476 op_data->op_name = name;
2477 op_data->op_namelen = namelen;
2478 op_data->op_mode = mode;
2479 op_data->op_mod_time = cfs_time_current_sec();
2480 op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2481 op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2482 op_data->op_cap = cfs_curproc_cap_pack();
2483 if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2484 filename_is_volatile(name, namelen, &op_data->op_mds)) {
2485 op_data->op_bias |= MDS_CREATE_VOLATILE;
2487 op_data->op_mds = 0;
2489 op_data->op_data = data;
2494 void ll_finish_md_op_data(struct md_op_data *op_data)
2496 OBD_FREE_PTR(op_data);
2499 #ifdef HAVE_SUPEROPS_USE_DENTRY
2500 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2502 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
2505 struct ll_sb_info *sbi;
2507 #ifdef HAVE_SUPEROPS_USE_DENTRY
2508 LASSERT((seq != NULL) && (dentry != NULL));
2509 sbi = ll_s2sbi(dentry->d_sb);
2511 LASSERT((seq != NULL) && (vfs != NULL));
2512 sbi = ll_s2sbi(vfs->mnt_sb);
2515 if (sbi->ll_flags & LL_SBI_NOLCK)
2516 seq_puts(seq, ",nolock");
2518 if (sbi->ll_flags & LL_SBI_FLOCK)
2519 seq_puts(seq, ",flock");
2521 if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2522 seq_puts(seq, ",localflock");
2524 if (sbi->ll_flags & LL_SBI_USER_XATTR)
2525 seq_puts(seq, ",user_xattr");
2527 if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2528 seq_puts(seq, ",lazystatfs");
2530 if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2531 seq_puts(seq, ",user_fid2path");
2537 * Get obd name by cmd, and copy out to user space
2539 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2541 struct ll_sb_info *sbi = ll_i2sbi(inode);
2542 struct obd_device *obd;
2545 if (cmd == OBD_IOC_GETDTNAME)
2546 obd = class_exp2obd(sbi->ll_dt_exp);
2547 else if (cmd == OBD_IOC_GETMDNAME)
2548 obd = class_exp2obd(sbi->ll_md_exp);
2555 if (copy_to_user((void __user *)arg, obd->obd_name,
2556 strlen(obd->obd_name) + 1))
2563 * Get lustre file system name by \a sbi. If \a buf is provided(non-NULL), the
2564 * fsname will be returned in this buffer; otherwise, a static buffer will be
2565 * used to store the fsname and returned to caller.
2567 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
2569 static char fsname_static[MTI_NAME_MAXLEN];
2570 struct lustre_sb_info *lsi = s2lsi(sb);
2575 /* this means the caller wants to use static buffer
2576 * and it doesn't care about race. Usually this is
2577 * in error reporting path */
2578 buf = fsname_static;
2579 buflen = sizeof(fsname_static);
2582 len = strlen(lsi->lsi_lmd->lmd_profile);
2583 ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
2584 if (ptr && (strcmp(ptr, "-client") == 0))
2587 if (unlikely(len >= buflen))
2589 strncpy(buf, lsi->lsi_lmd->lmd_profile, len);
2595 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
2602 p.mnt = current->fs->root.mnt;
2604 path = d_path(&p, buf, bufsize);
2609 void ll_dirty_page_discard_warn(struct page *page, int ioret)
2611 char *buf, *path = NULL;
2612 struct dentry *dentry = NULL;
2613 struct inode *inode = page->mapping->host;
2615 /* this can be called inside spin lock so use GFP_ATOMIC. */
2616 buf = (char *)__get_free_page(GFP_ATOMIC);
2618 dentry = d_find_alias(page->mapping->host);
2620 path = ll_d_path(dentry, buf, PAGE_SIZE);
2624 "%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
2625 "(rc %d)\n", ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
2626 s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2627 PFID(ll_inode2fid(inode)),
2628 (path && !IS_ERR(path)) ? path : "", ioret);
2634 free_page((unsigned long)buf);
2637 ssize_t ll_copy_user_md(const struct lov_user_md __user *md,
2638 struct lov_user_md **kbuf)
2640 struct lov_user_md lum;
2644 if (copy_from_user(&lum, md, sizeof(lum)))
2647 lum_size = ll_lov_user_md_size(&lum);
2651 OBD_ALLOC(*kbuf, lum_size);
2655 if (copy_from_user(*kbuf, md, lum_size) != 0) {
2656 OBD_FREE(*kbuf, lum_size);
2664 * Compute llite root squash state after a change of root squash
2665 * configuration setting or add/remove of a lnet nid
2667 void ll_compute_rootsquash_state(struct ll_sb_info *sbi)
2669 struct root_squash_info *squash = &sbi->ll_squash;
2672 lnet_process_id_t id;
2674 /* Update norootsquash flag */
2675 down_write(&squash->rsi_sem);
2676 if (list_empty(&squash->rsi_nosquash_nids))
2677 sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2679 /* Do not apply root squash as soon as one of our NIDs is
2680 * in the nosquash_nids list */
2683 while (LNetGetId(i++, &id) != -ENOENT) {
2684 if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
2686 if (cfs_match_nid(id.nid, &squash->rsi_nosquash_nids)) {
2692 sbi->ll_flags |= LL_SBI_NOROOTSQUASH;
2694 sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2696 up_write(&squash->rsi_sem);
2700 * Parse linkea content to extract information about a given hardlink
2702 * \param[in] ldata - Initialized linkea data
2703 * \param[in] linkno - Link identifier
2704 * \param[out] parent_fid - The entry's parent FID
2705 * \param[out] ln - Entry name destination buffer
2707 * \retval 0 on success
2708 * \retval Appropriate negative error code on failure
2710 static int ll_linkea_decode(struct linkea_data *ldata, unsigned int linkno,
2711 struct lu_fid *parent_fid, struct lu_name *ln)
2717 rc = linkea_init(ldata);
2721 if (linkno >= ldata->ld_leh->leh_reccount)
2722 /* beyond last link */
2725 linkea_first_entry(ldata);
2726 for (idx = 0; ldata->ld_lee != NULL; idx++) {
2727 linkea_entry_unpack(ldata->ld_lee, &ldata->ld_reclen, ln,
2732 linkea_next_entry(ldata);
2742 * Get parent FID and name of an identified link. Operation is performed for
2743 * a given link number, letting the caller iterate over linkno to list one or
2744 * all links of an entry.
2746 * \param[in] file - File descriptor against which to perform the operation
2747 * \param[in,out] arg - User-filled structure containing the linkno to operate
2748 * on and the available size. It is eventually filled with
2749 * the requested information or left untouched on error
2751 * \retval - 0 on success
2752 * \retval - Appropriate negative error code on failure
2754 int ll_getparent(struct file *file, struct getparent __user *arg)
2756 struct dentry *dentry = file->f_path.dentry;
2757 struct inode *inode = dentry->d_inode;
2758 struct linkea_data *ldata;
2759 struct lu_buf buf = LU_BUF_NULL;
2761 struct lu_fid parent_fid;
2768 if (!cfs_capable(CFS_CAP_DAC_READ_SEARCH) &&
2769 !(ll_i2sbi(inode)->ll_flags & LL_SBI_USER_FID2PATH))
2772 if (get_user(name_size, &arg->gp_name_size))
2775 if (get_user(linkno, &arg->gp_linkno))
2778 if (name_size > PATH_MAX)
2781 OBD_ALLOC(ldata, sizeof(*ldata));
2785 rc = linkea_data_new(ldata, &buf);
2787 GOTO(ldata_free, rc);
2789 rc = ll_getxattr(dentry, XATTR_NAME_LINK, buf.lb_buf, buf.lb_len);
2793 rc = ll_linkea_decode(ldata, linkno, &parent_fid, &ln);
2797 if (ln.ln_namelen >= name_size)
2798 GOTO(lb_free, rc = -EOVERFLOW);
2800 if (copy_to_user(&arg->gp_fid, &parent_fid, sizeof(arg->gp_fid)))
2801 GOTO(lb_free, rc = -EFAULT);
2803 if (copy_to_user(&arg->gp_name, ln.ln_name, ln.ln_namelen))
2804 GOTO(lb_free, rc = -EFAULT);
2806 if (put_user('\0', arg->gp_name + ln.ln_namelen))
2807 GOTO(lb_free, rc = -EFAULT);
2812 OBD_FREE(ldata, sizeof(*ldata));