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/time.h>
46 #include <linux/types.h>
47 #include <linux/version.h>
49 #include <linux/user_namespace.h>
50 #ifdef HAVE_UIDGID_HEADER
51 # include <linux/uidgid.h>
54 #include <lustre_ioctl.h>
55 #include <lustre_ha.h>
56 #include <lustre_dlm.h>
57 #include <lprocfs_status.h>
58 #include <lustre_disk.h>
59 #include <lustre_param.h>
60 #include <lustre_log.h>
61 #include <cl_object.h>
62 #include <obd_cksum.h>
63 #include "llite_internal.h"
65 struct kmem_cache *ll_file_data_slab;
68 #define log2(n) ffz(~(n))
71 static struct ll_sb_info *ll_init_sbi(void)
73 struct ll_sb_info *sbi = NULL;
75 unsigned long lru_page_max;
85 spin_lock_init(&sbi->ll_lock);
86 mutex_init(&sbi->ll_lco.lco_lock);
87 spin_lock_init(&sbi->ll_pp_extent_lock);
88 spin_lock_init(&sbi->ll_process_lock);
89 sbi->ll_rw_stats_on = 0;
92 pages = si.totalram - si.totalhigh;
93 lru_page_max = pages / 2;
95 /* initialize ll_cache data */
96 sbi->ll_cache = cl_cache_init(lru_page_max);
97 if (sbi->ll_cache == NULL) {
98 OBD_FREE(sbi, sizeof(*sbi));
102 sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
103 SBI_DEFAULT_READAHEAD_MAX);
104 sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
105 sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
106 SBI_DEFAULT_READAHEAD_WHOLE_MAX;
107 INIT_LIST_HEAD(&sbi->ll_conn_chain);
108 INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list);
110 ll_generate_random_uuid(uuid);
111 class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
112 CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
114 sbi->ll_flags |= LL_SBI_VERBOSE;
115 #ifdef ENABLE_CHECKSUM
116 sbi->ll_flags |= LL_SBI_CHECKSUM;
119 #ifdef HAVE_LRU_RESIZE_SUPPORT
120 sbi->ll_flags |= LL_SBI_LRU_RESIZE;
123 for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
124 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
126 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
130 /* metadata statahead is enabled by default */
131 sbi->ll_sa_max = LL_SA_RPC_DEF;
132 atomic_set(&sbi->ll_sa_total, 0);
133 atomic_set(&sbi->ll_sa_wrong, 0);
134 atomic_set(&sbi->ll_sa_running, 0);
135 atomic_set(&sbi->ll_agl_total, 0);
136 sbi->ll_flags |= LL_SBI_AGL_ENABLED;
139 sbi->ll_squash.rsi_uid = 0;
140 sbi->ll_squash.rsi_gid = 0;
141 INIT_LIST_HEAD(&sbi->ll_squash.rsi_nosquash_nids);
142 init_rwsem(&sbi->ll_squash.rsi_sem);
147 static void ll_free_sbi(struct super_block *sb)
149 struct ll_sb_info *sbi = ll_s2sbi(sb);
153 if (!list_empty(&sbi->ll_squash.rsi_nosquash_nids))
154 cfs_free_nidlist(&sbi->ll_squash.rsi_nosquash_nids);
155 if (sbi->ll_cache != NULL) {
156 cl_cache_decref(sbi->ll_cache);
157 sbi->ll_cache = NULL;
159 OBD_FREE(sbi, sizeof(*sbi));
164 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
165 struct vfsmount *mnt)
167 struct inode *root = NULL;
168 struct ll_sb_info *sbi = ll_s2sbi(sb);
169 struct obd_device *obd;
170 struct obd_statfs *osfs = NULL;
171 struct ptlrpc_request *request = NULL;
172 struct obd_connect_data *data = NULL;
173 struct obd_uuid *uuid;
174 struct md_op_data *op_data;
175 struct lustre_md lmd;
177 int size, err, checksum;
180 obd = class_name2obd(md);
182 CERROR("MD %s: not setup or attached\n", md);
196 /* indicate the features supported by this client */
197 data->ocd_connect_flags = OBD_CONNECT_IBITS | OBD_CONNECT_NODEVOH |
198 OBD_CONNECT_ATTRFID |
199 OBD_CONNECT_VERSION | OBD_CONNECT_BRW_SIZE |
200 OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
201 OBD_CONNECT_CANCELSET | OBD_CONNECT_FID |
202 OBD_CONNECT_AT | OBD_CONNECT_LOV_V3 |
203 OBD_CONNECT_RMT_CLIENT | OBD_CONNECT_VBR |
204 OBD_CONNECT_FULL20 | OBD_CONNECT_64BITHASH|
205 OBD_CONNECT_EINPROGRESS |
206 OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
207 OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS |
208 OBD_CONNECT_MAX_EASIZE |
209 OBD_CONNECT_FLOCK_DEAD |
210 OBD_CONNECT_DISP_STRIPE | OBD_CONNECT_LFSCK |
211 OBD_CONNECT_OPEN_BY_FID |
212 OBD_CONNECT_DIR_STRIPE |
213 OBD_CONNECT_BULK_MBITS |
216 #ifdef HAVE_LRU_RESIZE_SUPPORT
217 if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
218 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
220 #ifdef CONFIG_FS_POSIX_ACL
221 data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK;
224 if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
225 /* flag mdc connection as lightweight, only used for test
226 * purpose, use with care */
227 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
229 data->ocd_ibits_known = MDS_INODELOCK_FULL;
230 data->ocd_version = LUSTRE_VERSION_CODE;
232 if (sb->s_flags & MS_RDONLY)
233 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
234 if (sbi->ll_flags & LL_SBI_USER_XATTR)
235 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
237 #ifdef HAVE_MS_FLOCK_LOCK
238 /* force vfs to use lustre handler for flock() calls - bug 10743 */
239 sb->s_flags |= MS_FLOCK_LOCK;
241 #ifdef MS_HAS_NEW_AOPS
242 sb->s_flags |= MS_HAS_NEW_AOPS;
245 if (sbi->ll_flags & LL_SBI_FLOCK)
246 sbi->ll_fop = &ll_file_operations_flock;
247 else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
248 sbi->ll_fop = &ll_file_operations;
250 sbi->ll_fop = &ll_file_operations_noflock;
253 data->ocd_connect_flags |= OBD_CONNECT_REAL;
254 if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
255 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
257 /* always ping even if server suppress_pings */
258 if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
259 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
261 data->ocd_brw_size = MD_MAX_BRW_SIZE;
263 err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid, data, NULL);
265 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
266 "recovery, of which this client is not a "
267 "part. Please wait for recovery to complete,"
268 " abort, or time out.\n", md);
271 CERROR("cannot connect to %s: rc = %d\n", md, err);
275 sbi->ll_md_exp->exp_connect_data = *data;
277 err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
278 LUSTRE_SEQ_METADATA);
280 CERROR("%s: Can't init metadata layer FID infrastructure, "
281 "rc = %d\n", sbi->ll_md_exp->exp_obd->obd_name, err);
285 /* For mount, we only need fs info from MDT0, and also in DNE, it
286 * can make sure the client can be mounted as long as MDT0 is
288 err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
289 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
290 OBD_STATFS_FOR_MDT0);
292 GOTO(out_md_fid, err);
294 /* This needs to be after statfs to ensure connect has finished.
295 * Note that "data" does NOT contain the valid connect reply.
296 * If connecting to a 1.8 server there will be no LMV device, so
297 * we can access the MDC export directly and exp_connect_flags will
298 * be non-zero, but if accessing an upgraded 2.1 server it will
299 * have the correct flags filled in.
300 * XXX: fill in the LMV exp_connect_flags from MDC(s). */
301 valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
302 if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
303 valid != CLIENT_CONNECT_MDT_REQD) {
306 OBD_ALLOC_WAIT(buf, PAGE_CACHE_SIZE);
307 obd_connect_flags2str(buf, PAGE_CACHE_SIZE,
308 valid ^ CLIENT_CONNECT_MDT_REQD, ",");
309 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
310 "feature(s) needed for correct operation "
311 "of this client (%s). Please upgrade "
312 "server or downgrade client.\n",
313 sbi->ll_md_exp->exp_obd->obd_name, buf);
314 OBD_FREE(buf, PAGE_CACHE_SIZE);
315 GOTO(out_md_fid, err = -EPROTO);
318 size = sizeof(*data);
319 err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
320 KEY_CONN_DATA, &size, data);
322 CERROR("%s: Get connect data failed: rc = %d\n",
323 sbi->ll_md_exp->exp_obd->obd_name, err);
324 GOTO(out_md_fid, err);
327 LASSERT(osfs->os_bsize);
328 sb->s_blocksize = osfs->os_bsize;
329 sb->s_blocksize_bits = log2(osfs->os_bsize);
330 sb->s_magic = LL_SUPER_MAGIC;
331 sb->s_maxbytes = MAX_LFS_FILESIZE;
332 sbi->ll_namelen = osfs->os_namelen;
334 if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
335 !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
336 LCONSOLE_INFO("Disabling user_xattr feature because "
337 "it is not supported on the server\n");
338 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
341 if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
343 sb->s_flags |= MS_POSIXACL;
345 sbi->ll_flags |= LL_SBI_ACL;
347 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
349 sb->s_flags &= ~MS_POSIXACL;
351 sbi->ll_flags &= ~LL_SBI_ACL;
354 if (data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) {
355 if (!(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
356 sbi->ll_flags |= LL_SBI_RMT_CLIENT;
357 LCONSOLE_INFO("client is set as remote by default.\n");
360 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
361 sbi->ll_flags &= ~LL_SBI_RMT_CLIENT;
362 LCONSOLE_INFO("client claims to be remote, but server "
363 "rejected, forced to be local.\n");
367 if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
368 sbi->ll_flags |= LL_SBI_64BIT_HASH;
370 if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE)
371 sbi->ll_md_brw_pages = data->ocd_brw_size >> PAGE_CACHE_SHIFT;
373 sbi->ll_md_brw_pages = 1;
375 if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK)
376 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
378 if (data->ocd_ibits_known & MDS_INODELOCK_XATTR) {
379 if (!(data->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)) {
380 LCONSOLE_INFO("%s: disabling xattr cache due to "
381 "unknown maximum xattr size.\n", dt);
383 sbi->ll_flags |= LL_SBI_XATTR_CACHE;
384 sbi->ll_xattr_cache_enabled = 1;
388 obd = class_name2obd(dt);
390 CERROR("DT %s: not setup or attached\n", dt);
391 GOTO(out_md_fid, err = -ENODEV);
394 /* pass client page size via ocd_grant_blkbits, the server should report
395 * back its backend blocksize for grant calculation purpose */
396 data->ocd_grant_blkbits = PAGE_SHIFT;
398 data->ocd_connect_flags = OBD_CONNECT_GRANT | OBD_CONNECT_VERSION |
399 OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
400 OBD_CONNECT_CANCELSET | OBD_CONNECT_FID |
401 OBD_CONNECT_SRVLOCK | OBD_CONNECT_TRUNCLOCK|
402 OBD_CONNECT_AT | OBD_CONNECT_RMT_CLIENT |
403 OBD_CONNECT_OSS_CAPA | OBD_CONNECT_VBR|
404 OBD_CONNECT_FULL20 | OBD_CONNECT_64BITHASH |
405 OBD_CONNECT_MAXBYTES |
406 OBD_CONNECT_EINPROGRESS |
407 OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
408 OBD_CONNECT_LAYOUTLOCK |
409 OBD_CONNECT_PINGLESS | OBD_CONNECT_LFSCK |
410 OBD_CONNECT_BULK_MBITS;
412 if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_GRANT_PARAM))
413 data->ocd_connect_flags |= OBD_CONNECT_GRANT_PARAM;
415 if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_CKSUM)) {
416 /* OBD_CONNECT_CKSUM should always be set, even if checksums are
417 * disabled by default, because it can still be enabled on the
418 * fly via /proc. As a consequence, we still need to come to an
419 * agreement on the supported algorithms at connect time */
420 data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
422 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
423 data->ocd_cksum_types = OBD_CKSUM_ADLER;
425 data->ocd_cksum_types = cksum_types_supported_client();
428 #ifdef HAVE_LRU_RESIZE_SUPPORT
429 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
431 if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
432 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
434 /* always ping even if server suppress_pings */
435 if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
436 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
438 CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d "
439 "ocd_grant: %d\n", data->ocd_connect_flags,
440 data->ocd_version, data->ocd_grant);
442 obd->obd_upcall.onu_owner = &sbi->ll_lco;
443 obd->obd_upcall.onu_upcall = cl_ocd_update;
445 data->ocd_brw_size = DT_MAX_BRW_SIZE;
447 err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data,
450 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
451 "recovery, of which this client is not a "
452 "part. Please wait for recovery to "
453 "complete, abort, or time out.\n", dt);
456 CERROR("%s: Cannot connect to %s: rc = %d\n",
457 sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
461 sbi->ll_dt_exp->exp_connect_data = *data;
463 err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
464 LUSTRE_SEQ_METADATA);
466 CERROR("%s: Can't init data layer FID infrastructure, "
467 "rc = %d\n", sbi->ll_dt_exp->exp_obd->obd_name, err);
471 mutex_lock(&sbi->ll_lco.lco_lock);
472 sbi->ll_lco.lco_flags = data->ocd_connect_flags;
473 sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
474 sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
475 mutex_unlock(&sbi->ll_lco.lco_lock);
477 fid_zero(&sbi->ll_root_fid);
478 err = md_get_root(sbi->ll_md_exp, get_mount_fileset(sb),
481 CERROR("cannot mds_connect: rc = %d\n", err);
482 GOTO(out_lock_cn_cb, err);
484 if (!fid_is_sane(&sbi->ll_root_fid)) {
485 CERROR("%s: Invalid root fid "DFID" during mount\n",
486 sbi->ll_md_exp->exp_obd->obd_name,
487 PFID(&sbi->ll_root_fid));
488 GOTO(out_lock_cn_cb, err = -EINVAL);
490 CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
492 sb->s_op = &lustre_super_operations;
493 #if THREAD_SIZE >= 8192 /*b=17630*/
494 sb->s_export_op = &lustre_export_operations;
498 * XXX: move this to after cbd setup? */
499 valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMODEASIZE;
500 if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
501 valid |= OBD_MD_FLRMTPERM;
502 else if (sbi->ll_flags & LL_SBI_ACL)
503 valid |= OBD_MD_FLACL;
505 OBD_ALLOC_PTR(op_data);
507 GOTO(out_lock_cn_cb, err = -ENOMEM);
509 op_data->op_fid1 = sbi->ll_root_fid;
510 op_data->op_mode = 0;
511 op_data->op_valid = valid;
513 err = md_getattr(sbi->ll_md_exp, op_data, &request);
515 OBD_FREE_PTR(op_data);
517 CERROR("%s: md_getattr failed for root: rc = %d\n",
518 sbi->ll_md_exp->exp_obd->obd_name, err);
519 GOTO(out_lock_cn_cb, err);
522 err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
523 sbi->ll_md_exp, &lmd);
525 CERROR("failed to understand root inode md: rc = %d\n", err);
526 ptlrpc_req_finished(request);
527 GOTO(out_lock_cn_cb, err);
530 LASSERT(fid_is_sane(&sbi->ll_root_fid));
531 root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
532 sbi->ll_flags & LL_SBI_32BIT_API),
534 md_free_lustre_md(sbi->ll_md_exp, &lmd);
535 ptlrpc_req_finished(request);
538 #ifdef CONFIG_FS_POSIX_ACL
540 posix_acl_release(lmd.posix_acl);
541 lmd.posix_acl = NULL;
544 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
546 CERROR("lustre_lite: bad iget4 for root\n");
550 #ifdef CONFIG_FS_POSIX_ACL
551 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
552 rct_init(&sbi->ll_rct);
553 et_init(&sbi->ll_et);
557 checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
558 err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
559 KEY_CHECKSUM, sizeof(checksum), &checksum,
563 err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CACHE_SET),
564 KEY_CACHE_SET, sizeof(*sbi->ll_cache),
565 sbi->ll_cache, NULL);
567 sb->s_root = d_make_root(root);
568 if (sb->s_root == NULL) {
569 CERROR("%s: can't make root dentry\n",
570 ll_get_fsname(sb, NULL, 0));
571 GOTO(out_root, err = -ENOMEM);
573 #ifdef HAVE_DCACHE_LOCK
574 sb->s_root->d_op = &ll_d_ops;
577 sbi->ll_sdev_orig = sb->s_dev;
579 /* We set sb->s_dev equal on all lustre clients in order to support
580 * NFS export clustering. NFSD requires that the FSID be the same
582 /* s_dev is also used in lt_compare() to compare two fs, but that is
583 * only a node-local comparison. */
584 uuid = obd_get_uuid(sbi->ll_md_exp);
586 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
592 if (proc_lustre_fs_root != NULL) {
593 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
596 CERROR("%s: could not register mount in lprocfs: "
597 "rc = %d\n", ll_get_fsname(sb, NULL, 0), err);
607 obd_fid_fini(sbi->ll_dt_exp->exp_obd);
609 obd_disconnect(sbi->ll_dt_exp);
610 sbi->ll_dt_exp = NULL;
612 obd_fid_fini(sbi->ll_md_exp->exp_obd);
614 obd_disconnect(sbi->ll_md_exp);
615 sbi->ll_md_exp = NULL;
624 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
628 size = sizeof(*lmmsize);
629 rc = obd_get_info(NULL, sbi->ll_dt_exp, sizeof(KEY_MAX_EASIZE),
630 KEY_MAX_EASIZE, &size, lmmsize);
632 CERROR("%s: cannot get max LOV EA size: rc = %d\n",
633 sbi->ll_dt_exp->exp_obd->obd_name, rc);
638 rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
639 KEY_MAX_EASIZE, &size, lmmsize);
641 CERROR("Get max mdsize error rc %d\n", rc);
647 * Get the value of the default_easize parameter.
649 * \see client_obd::cl_default_mds_easize
651 * \param[in] sbi superblock info for this filesystem
652 * \param[out] lmmsize pointer to storage location for value
654 * \retval 0 on success
655 * \retval negative negated errno on failure
657 int ll_get_default_mdsize(struct ll_sb_info *sbi, int *lmmsize)
662 rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_DEFAULT_EASIZE),
663 KEY_DEFAULT_EASIZE, &size, lmmsize);
665 CERROR("Get default mdsize error rc %d\n", rc);
671 * Set the default_easize parameter to the given value.
673 * \see client_obd::cl_default_mds_easize
675 * \param[in] sbi superblock info for this filesystem
676 * \param[in] lmmsize the size to set
678 * \retval 0 on success
679 * \retval negative negated errno on failure
681 int ll_set_default_mdsize(struct ll_sb_info *sbi, int lmmsize)
685 if (lmmsize < sizeof(struct lov_mds_md) ||
686 lmmsize > OBD_MAX_DEFAULT_EA_SIZE)
689 rc = obd_set_info_async(NULL, sbi->ll_md_exp,
690 sizeof(KEY_DEFAULT_EASIZE), KEY_DEFAULT_EASIZE,
691 sizeof(int), &lmmsize, NULL);
696 static void ll_dump_inode(struct inode *inode)
698 struct ll_d_hlist_node *tmp;
699 int dentry_count = 0;
701 LASSERT(inode != NULL);
703 ll_d_hlist_for_each(tmp, &inode->i_dentry)
706 CERROR("%s: inode %p dump: dev=%s fid="DFID
707 " mode=%o count=%u, %d dentries\n",
708 ll_get_fsname(inode->i_sb, NULL, 0), inode,
709 ll_i2mdexp(inode)->exp_obd->obd_name, PFID(ll_inode2fid(inode)),
710 inode->i_mode, atomic_read(&inode->i_count), dentry_count);
713 void lustre_dump_dentry(struct dentry *dentry, int recur)
715 struct list_head *tmp;
718 LASSERT(dentry != NULL);
720 list_for_each(tmp, &dentry->d_subdirs)
723 CERROR("dentry %p dump: name=%.*s parent=%.*s (%p), inode=%p, count=%u,"
724 " flags=0x%x, fsdata=%p, %d subdirs\n", dentry,
725 dentry->d_name.len, dentry->d_name.name,
726 dentry->d_parent->d_name.len, dentry->d_parent->d_name.name,
727 dentry->d_parent, dentry->d_inode, ll_d_count(dentry),
728 dentry->d_flags, dentry->d_fsdata, subdirs);
729 if (dentry->d_inode != NULL)
730 ll_dump_inode(dentry->d_inode);
735 list_for_each(tmp, &dentry->d_subdirs) {
736 struct dentry *d = list_entry(tmp, struct dentry, d_child);
737 lustre_dump_dentry(d, recur - 1);
741 static void client_common_put_super(struct super_block *sb)
743 struct ll_sb_info *sbi = ll_s2sbi(sb);
746 #ifdef CONFIG_FS_POSIX_ACL
747 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
748 et_fini(&sbi->ll_et);
749 rct_fini(&sbi->ll_rct);
755 list_del(&sbi->ll_conn_chain);
757 obd_fid_fini(sbi->ll_dt_exp->exp_obd);
758 obd_disconnect(sbi->ll_dt_exp);
759 sbi->ll_dt_exp = NULL;
761 lprocfs_unregister_mountpoint(sbi);
763 obd_fid_fini(sbi->ll_md_exp->exp_obd);
764 obd_disconnect(sbi->ll_md_exp);
765 sbi->ll_md_exp = NULL;
770 void ll_kill_super(struct super_block *sb)
772 struct ll_sb_info *sbi;
776 if (!(sb->s_flags & MS_ACTIVE))
780 /* we need restore s_dev from changed for clustred NFS before put_super
781 * because new kernels have cached s_dev and change sb->s_dev in
782 * put_super not affected real removing devices */
784 sb->s_dev = sbi->ll_sdev_orig;
785 sbi->ll_umounting = 1;
787 /* wait running statahead threads to quit */
788 while (atomic_read(&sbi->ll_sa_running) > 0) {
789 set_current_state(TASK_UNINTERRUPTIBLE);
790 schedule_timeout(msecs_to_jiffies(MSEC_PER_SEC >> 3));
797 static inline int ll_set_opt(const char *opt, char *data, int fl)
799 if (strncmp(opt, data, strlen(opt)) != 0)
805 /* non-client-specific mount options are parsed in lmd_parse */
806 static int ll_options(char *options, int *flags)
809 char *s1 = options, *s2;
815 CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
818 CDEBUG(D_SUPER, "next opt=%s\n", s1);
819 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
824 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
829 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
834 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
839 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
844 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
849 tmp = ll_set_opt("context", s1, 1);
852 tmp = ll_set_opt("fscontext", s1, 1);
855 tmp = ll_set_opt("defcontext", s1, 1);
858 tmp = ll_set_opt("rootcontext", s1, 1);
861 tmp = ll_set_opt("remote_client", s1, LL_SBI_RMT_CLIENT);
866 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
871 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
877 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
882 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
887 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
892 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
897 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
902 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
907 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
912 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
917 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
922 tmp = ll_set_opt("always_ping", s1, LL_SBI_ALWAYS_PING);
927 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
933 s2 = strchr(s1, ',');
941 void ll_lli_init(struct ll_inode_info *lli)
943 lli->lli_inode_magic = LLI_INODE_MAGIC;
945 spin_lock_init(&lli->lli_lock);
946 lli->lli_posix_acl = NULL;
947 lli->lli_remote_perms = NULL;
948 mutex_init(&lli->lli_rmtperm_mutex);
949 /* Do not set lli_fid, it has been initialized already. */
950 fid_zero(&lli->lli_pfid);
951 atomic_set(&lli->lli_open_count, 0);
952 lli->lli_rmtperm_time = 0;
953 lli->lli_mds_read_och = NULL;
954 lli->lli_mds_write_och = NULL;
955 lli->lli_mds_exec_och = NULL;
956 lli->lli_open_fd_read_count = 0;
957 lli->lli_open_fd_write_count = 0;
958 lli->lli_open_fd_exec_count = 0;
959 mutex_init(&lli->lli_och_mutex);
960 spin_lock_init(&lli->lli_agl_lock);
961 spin_lock_init(&lli->lli_layout_lock);
962 ll_layout_version_set(lli, CL_LAYOUT_GEN_NONE);
963 lli->lli_clob = NULL;
965 init_rwsem(&lli->lli_xattrs_list_rwsem);
966 mutex_init(&lli->lli_xattrs_enq_lock);
968 LASSERT(lli->lli_vfs_inode.i_mode != 0);
969 if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
970 mutex_init(&lli->lli_readdir_mutex);
971 lli->lli_opendir_key = NULL;
973 spin_lock_init(&lli->lli_sa_lock);
974 lli->lli_opendir_pid = 0;
975 lli->lli_sa_enabled = 0;
976 lli->lli_def_stripe_offset = -1;
978 mutex_init(&lli->lli_size_mutex);
979 lli->lli_symlink_name = NULL;
980 init_rwsem(&lli->lli_trunc_sem);
981 range_lock_tree_init(&lli->lli_write_tree);
982 init_rwsem(&lli->lli_glimpse_sem);
983 lli->lli_glimpse_time = 0;
984 INIT_LIST_HEAD(&lli->lli_agl_list);
985 lli->lli_agl_index = 0;
986 lli->lli_async_rc = 0;
988 mutex_init(&lli->lli_layout_mutex);
991 static inline int ll_bdi_register(struct backing_dev_info *bdi)
993 static atomic_t ll_bdi_num = ATOMIC_INIT(0);
995 bdi->name = "lustre";
996 return bdi_register(bdi, NULL, "lustre-%d",
997 atomic_inc_return(&ll_bdi_num));
1000 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
1002 struct lustre_profile *lprof = NULL;
1003 struct lustre_sb_info *lsi = s2lsi(sb);
1004 struct ll_sb_info *sbi;
1005 char *dt = NULL, *md = NULL;
1006 char *profilenm = get_profile_name(sb);
1007 struct config_llog_instance *cfg;
1008 /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
1009 const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
1013 CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
1019 try_module_get(THIS_MODULE);
1021 /* client additional sb info */
1022 lsi->lsi_llsbi = sbi = ll_init_sbi();
1024 module_put(THIS_MODULE);
1029 err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
1031 GOTO(out_free, err);
1033 err = bdi_init(&lsi->lsi_bdi);
1035 GOTO(out_free, err);
1036 lsi->lsi_flags |= LSI_BDI_INITIALIZED;
1037 #ifdef HAVE_BDI_CAP_MAP_COPY
1038 lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
1040 lsi->lsi_bdi.capabilities = 0;
1042 err = ll_bdi_register(&lsi->lsi_bdi);
1044 GOTO(out_free, err);
1046 sb->s_bdi = &lsi->lsi_bdi;
1047 #ifndef HAVE_DCACHE_LOCK
1048 /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
1049 sb->s_d_op = &ll_d_ops;
1052 /* Generate a string unique to this super, in case some joker tries
1053 to mount the same fs at two mount points.
1054 Use the address of the super itself.*/
1055 cfg->cfg_instance = sb;
1056 cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
1057 cfg->cfg_callback = class_config_llog_handler;
1058 /* set up client obds */
1059 err = lustre_process_log(sb, profilenm, cfg);
1061 GOTO(out_free, err);
1063 /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1064 lprof = class_get_profile(profilenm);
1065 if (lprof == NULL) {
1066 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1067 " read from the MGS. Does that filesystem "
1068 "exist?\n", profilenm);
1069 GOTO(out_free, err = -EINVAL);
1071 CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1072 lprof->lp_md, lprof->lp_dt);
1074 OBD_ALLOC(dt, strlen(lprof->lp_dt) + instlen + 2);
1076 GOTO(out_free, err = -ENOMEM);
1077 sprintf(dt, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
1079 OBD_ALLOC(md, strlen(lprof->lp_md) + instlen + 2);
1081 GOTO(out_free, err = -ENOMEM);
1082 sprintf(md, "%s-%p", lprof->lp_md, cfg->cfg_instance);
1084 /* connections, registrations, sb setup */
1085 err = client_common_fill_super(sb, md, dt, mnt);
1087 GOTO(out_free, err);
1089 sbi->ll_client_common_fill_super_succeeded = 1;
1093 OBD_FREE(md, strlen(lprof->lp_md) + instlen + 2);
1095 OBD_FREE(dt, strlen(lprof->lp_dt) + instlen + 2);
1097 class_put_profile(lprof);
1100 else if (sbi->ll_flags & LL_SBI_VERBOSE)
1101 LCONSOLE_WARN("Mounted %s\n", profilenm);
1105 } /* ll_fill_super */
1107 void ll_put_super(struct super_block *sb)
1109 struct config_llog_instance cfg, params_cfg;
1110 struct obd_device *obd;
1111 struct lustre_sb_info *lsi = s2lsi(sb);
1112 struct ll_sb_info *sbi = ll_s2sbi(sb);
1113 char *profilenm = get_profile_name(sb);
1115 int next, force = 1, rc = 0;
1118 CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1120 cfg.cfg_instance = sb;
1121 lustre_end_log(sb, profilenm, &cfg);
1123 params_cfg.cfg_instance = sb;
1124 lustre_end_log(sb, PARAMS_FILENAME, ¶ms_cfg);
1126 if (sbi->ll_md_exp) {
1127 obd = class_exp2obd(sbi->ll_md_exp);
1129 force = obd->obd_force;
1132 /* Wait for unstable pages to be committed to stable storage */
1134 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
1135 rc = l_wait_event(sbi->ll_cache->ccc_unstable_waitq,
1136 atomic_long_read(&sbi->ll_cache->ccc_unstable_nr) == 0,
1140 ccc_count = atomic_long_read(&sbi->ll_cache->ccc_unstable_nr);
1141 if (force == 0 && rc != -EINTR)
1142 LASSERTF(ccc_count == 0, "count: %li\n", ccc_count);
1145 /* We need to set force before the lov_disconnect in
1146 lustre_common_put_super, since l_d cleans up osc's as well. */
1149 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1151 obd->obd_force = force;
1155 if (sbi->ll_client_common_fill_super_succeeded) {
1156 /* Only if client_common_fill_super succeeded */
1157 client_common_put_super(sb);
1161 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1162 class_manual_cleanup(obd);
1165 if (sbi->ll_flags & LL_SBI_VERBOSE)
1166 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1169 class_del_profile(profilenm);
1171 if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1172 bdi_destroy(&lsi->lsi_bdi);
1173 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1177 lsi->lsi_llsbi = NULL;
1179 lustre_common_put_super(sb);
1181 cl_env_cache_purge(~0);
1183 module_put(THIS_MODULE);
1186 } /* client_put_super */
1188 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1190 struct inode *inode = NULL;
1192 /* NOTE: we depend on atomic igrab() -bzzz */
1193 lock_res_and_lock(lock);
1194 if (lock->l_resource->lr_lvb_inode) {
1195 struct ll_inode_info * lli;
1196 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1197 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1198 inode = igrab(lock->l_resource->lr_lvb_inode);
1200 inode = lock->l_resource->lr_lvb_inode;
1201 LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ? D_INFO :
1202 D_WARNING, lock, "lr_lvb_inode %p is "
1203 "bogus: magic %08x",
1204 lock->l_resource->lr_lvb_inode,
1205 lli->lli_inode_magic);
1209 unlock_res_and_lock(lock);
1213 void ll_dir_clear_lsm_md(struct inode *inode)
1215 struct ll_inode_info *lli = ll_i2info(inode);
1217 LASSERT(S_ISDIR(inode->i_mode));
1219 if (lli->lli_lsm_md != NULL) {
1220 lmv_free_memmd(lli->lli_lsm_md);
1221 lli->lli_lsm_md = NULL;
1225 static struct inode *ll_iget_anon_dir(struct super_block *sb,
1226 const struct lu_fid *fid,
1227 struct lustre_md *md)
1229 struct ll_sb_info *sbi = ll_s2sbi(sb);
1230 struct mdt_body *body = md->body;
1231 struct inode *inode;
1235 ino = cl_fid_build_ino(fid, sbi->ll_flags & LL_SBI_32BIT_API);
1236 inode = iget_locked(sb, ino);
1237 if (inode == NULL) {
1238 CERROR("%s: failed get simple inode "DFID": rc = -ENOENT\n",
1239 ll_get_fsname(sb, NULL, 0), PFID(fid));
1240 RETURN(ERR_PTR(-ENOENT));
1243 if (inode->i_state & I_NEW) {
1244 struct ll_inode_info *lli = ll_i2info(inode);
1245 struct lmv_stripe_md *lsm = md->lmv;
1247 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1248 (body->mbo_mode & S_IFMT);
1249 LASSERTF(S_ISDIR(inode->i_mode), "Not slave inode "DFID"\n",
1252 LTIME_S(inode->i_mtime) = 0;
1253 LTIME_S(inode->i_atime) = 0;
1254 LTIME_S(inode->i_ctime) = 0;
1257 #ifdef HAVE_BACKING_DEV_INFO
1258 /* initializing backing dev info. */
1259 inode->i_mapping->backing_dev_info =
1260 &s2lsi(inode->i_sb)->lsi_bdi;
1262 inode->i_op = &ll_dir_inode_operations;
1263 inode->i_fop = &ll_dir_operations;
1264 lli->lli_fid = *fid;
1267 LASSERT(lsm != NULL);
1268 /* master object FID */
1269 lli->lli_pfid = body->mbo_fid1;
1270 CDEBUG(D_INODE, "lli %p slave "DFID" master "DFID"\n",
1271 lli, PFID(fid), PFID(&lli->lli_pfid));
1272 unlock_new_inode(inode);
1278 static int ll_init_lsm_md(struct inode *inode, struct lustre_md *md)
1281 struct lmv_stripe_md *lsm = md->lmv;
1284 LASSERT(lsm != NULL);
1285 /* XXX sigh, this lsm_root initialization should be in
1286 * LMV layer, but it needs ll_iget right now, so we
1287 * put this here right now. */
1288 for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
1289 fid = &lsm->lsm_md_oinfo[i].lmo_fid;
1290 LASSERT(lsm->lsm_md_oinfo[i].lmo_root == NULL);
1291 /* Unfortunately ll_iget will call ll_update_inode,
1292 * where the initialization of slave inode is slightly
1293 * different, so it reset lsm_md to NULL to avoid
1294 * initializing lsm for slave inode. */
1295 /* For migrating inode, master stripe and master object will
1296 * be same, so we only need assign this inode */
1297 if (lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION && i == 0)
1298 lsm->lsm_md_oinfo[i].lmo_root = inode;
1300 lsm->lsm_md_oinfo[i].lmo_root =
1301 ll_iget_anon_dir(inode->i_sb, fid, md);
1303 if (IS_ERR(lsm->lsm_md_oinfo[i].lmo_root)) {
1304 int rc = PTR_ERR(lsm->lsm_md_oinfo[i].lmo_root);
1306 lsm->lsm_md_oinfo[i].lmo_root = NULL;
1314 static inline int lli_lsm_md_eq(const struct lmv_stripe_md *lsm_md1,
1315 const struct lmv_stripe_md *lsm_md2)
1317 return lsm_md1->lsm_md_magic == lsm_md2->lsm_md_magic &&
1318 lsm_md1->lsm_md_stripe_count == lsm_md2->lsm_md_stripe_count &&
1319 lsm_md1->lsm_md_master_mdt_index ==
1320 lsm_md2->lsm_md_master_mdt_index &&
1321 lsm_md1->lsm_md_hash_type == lsm_md2->lsm_md_hash_type &&
1322 lsm_md1->lsm_md_layout_version ==
1323 lsm_md2->lsm_md_layout_version &&
1324 strcmp(lsm_md1->lsm_md_pool_name,
1325 lsm_md2->lsm_md_pool_name) == 0;
1328 static int ll_update_lsm_md(struct inode *inode, struct lustre_md *md)
1330 struct ll_inode_info *lli = ll_i2info(inode);
1331 struct lmv_stripe_md *lsm = md->lmv;
1335 LASSERT(S_ISDIR(inode->i_mode));
1336 CDEBUG(D_INODE, "update lsm %p of "DFID"\n", lli->lli_lsm_md,
1337 PFID(ll_inode2fid(inode)));
1339 /* no striped information from request. */
1341 if (lli->lli_lsm_md == NULL) {
1343 } else if (lli->lli_lsm_md->lsm_md_hash_type &
1344 LMV_HASH_FLAG_MIGRATION) {
1345 /* migration is done, the temporay MIGRATE layout has
1347 CDEBUG(D_INODE, DFID" finish migration.\n",
1348 PFID(ll_inode2fid(inode)));
1349 lmv_free_memmd(lli->lli_lsm_md);
1350 lli->lli_lsm_md = NULL;
1353 /* The lustre_md from req does not include stripeEA,
1354 * see ll_md_setattr */
1359 /* set the directory layout */
1360 if (lli->lli_lsm_md == NULL) {
1361 struct cl_attr *attr;
1363 rc = ll_init_lsm_md(inode, md);
1367 /* set md->lmv to NULL, so the following free lustre_md
1368 * will not free this lsm */
1370 lli->lli_lsm_md = lsm;
1372 OBD_ALLOC_PTR(attr);
1376 /* validate the lsm */
1377 rc = md_merge_attr(ll_i2mdexp(inode), lsm, attr,
1378 ll_md_blocking_ast);
1384 if (md->body->mbo_valid & OBD_MD_FLNLINK)
1385 md->body->mbo_nlink = attr->cat_nlink;
1386 if (md->body->mbo_valid & OBD_MD_FLSIZE)
1387 md->body->mbo_size = attr->cat_size;
1388 if (md->body->mbo_valid & OBD_MD_FLATIME)
1389 md->body->mbo_atime = attr->cat_atime;
1390 if (md->body->mbo_valid & OBD_MD_FLCTIME)
1391 md->body->mbo_ctime = attr->cat_ctime;
1392 if (md->body->mbo_valid & OBD_MD_FLMTIME)
1393 md->body->mbo_mtime = attr->cat_mtime;
1397 CDEBUG(D_INODE, "Set lsm %p magic %x to "DFID"\n", lsm,
1398 lsm->lsm_md_magic, PFID(ll_inode2fid(inode)));
1402 /* Compare the old and new stripe information */
1403 if (!lsm_md_eq(lli->lli_lsm_md, lsm)) {
1404 struct lmv_stripe_md *old_lsm = lli->lli_lsm_md;
1407 CERROR("%s: inode "DFID"(%p)'s lmv layout mismatch (%p)/(%p)"
1408 "magic:0x%x/0x%x stripe count: %d/%d master_mdt: %d/%d"
1409 "hash_type:0x%x/0x%x layout: 0x%x/0x%x pool:%s/%s\n",
1410 ll_get_fsname(inode->i_sb, NULL, 0), PFID(&lli->lli_fid),
1411 inode, lsm, old_lsm,
1412 lsm->lsm_md_magic, old_lsm->lsm_md_magic,
1413 lsm->lsm_md_stripe_count,
1414 old_lsm->lsm_md_stripe_count,
1415 lsm->lsm_md_master_mdt_index,
1416 old_lsm->lsm_md_master_mdt_index,
1417 lsm->lsm_md_hash_type, old_lsm->lsm_md_hash_type,
1418 lsm->lsm_md_layout_version,
1419 old_lsm->lsm_md_layout_version,
1420 lsm->lsm_md_pool_name,
1421 old_lsm->lsm_md_pool_name);
1423 for (idx = 0; idx < old_lsm->lsm_md_stripe_count; idx++) {
1424 CERROR("%s: sub FIDs in old lsm idx %d, old: "DFID"\n",
1425 ll_get_fsname(inode->i_sb, NULL, 0), idx,
1426 PFID(&old_lsm->lsm_md_oinfo[idx].lmo_fid));
1429 for (idx = 0; idx < lsm->lsm_md_stripe_count; idx++) {
1430 CERROR("%s: sub FIDs in new lsm idx %d, new: "DFID"\n",
1431 ll_get_fsname(inode->i_sb, NULL, 0), idx,
1432 PFID(&lsm->lsm_md_oinfo[idx].lmo_fid));
1441 void ll_clear_inode(struct inode *inode)
1443 struct ll_inode_info *lli = ll_i2info(inode);
1444 struct ll_sb_info *sbi = ll_i2sbi(inode);
1447 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1448 PFID(ll_inode2fid(inode)), inode);
1450 if (S_ISDIR(inode->i_mode)) {
1451 /* these should have been cleared in ll_file_release */
1452 LASSERT(lli->lli_opendir_key == NULL);
1453 LASSERT(lli->lli_sai == NULL);
1454 LASSERT(lli->lli_opendir_pid == 0);
1457 md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1459 LASSERT(!lli->lli_open_fd_write_count);
1460 LASSERT(!lli->lli_open_fd_read_count);
1461 LASSERT(!lli->lli_open_fd_exec_count);
1463 if (lli->lli_mds_write_och)
1464 ll_md_real_close(inode, FMODE_WRITE);
1465 if (lli->lli_mds_exec_och)
1466 ll_md_real_close(inode, FMODE_EXEC);
1467 if (lli->lli_mds_read_och)
1468 ll_md_real_close(inode, FMODE_READ);
1470 if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1471 OBD_FREE(lli->lli_symlink_name,
1472 strlen(lli->lli_symlink_name) + 1);
1473 lli->lli_symlink_name = NULL;
1476 ll_xattr_cache_destroy(inode);
1478 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1479 LASSERT(lli->lli_posix_acl == NULL);
1480 if (lli->lli_remote_perms) {
1481 free_rmtperm_hash(lli->lli_remote_perms);
1482 lli->lli_remote_perms = NULL;
1485 #ifdef CONFIG_FS_POSIX_ACL
1486 else if (lli->lli_posix_acl) {
1487 LASSERT(atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1488 LASSERT(lli->lli_remote_perms == NULL);
1489 posix_acl_release(lli->lli_posix_acl);
1490 lli->lli_posix_acl = NULL;
1493 lli->lli_inode_magic = LLI_INODE_DEAD;
1495 if (S_ISDIR(inode->i_mode))
1496 ll_dir_clear_lsm_md(inode);
1497 else if (S_ISREG(inode->i_mode) && !is_bad_inode(inode))
1498 LASSERT(list_empty(&lli->lli_agl_list));
1501 * XXX This has to be done before lsm is freed below, because
1502 * cl_object still uses inode lsm.
1504 cl_inode_fini(inode);
1509 static int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data)
1511 struct lustre_md md;
1512 struct inode *inode = dentry->d_inode;
1513 struct ll_sb_info *sbi = ll_i2sbi(inode);
1514 struct ptlrpc_request *request = NULL;
1518 op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1519 LUSTRE_OPC_ANY, NULL);
1520 if (IS_ERR(op_data))
1521 RETURN(PTR_ERR(op_data));
1523 rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &request);
1525 ptlrpc_req_finished(request);
1526 if (rc == -ENOENT) {
1528 /* Unlinked special device node? Or just a race?
1529 * Pretend we done everything. */
1530 if (!S_ISREG(inode->i_mode) &&
1531 !S_ISDIR(inode->i_mode)) {
1532 ia_valid = op_data->op_attr.ia_valid;
1533 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1534 rc = simple_setattr(dentry, &op_data->op_attr);
1535 op_data->op_attr.ia_valid = ia_valid;
1537 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1538 CERROR("md_setattr fails: rc = %d\n", rc);
1543 rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1544 sbi->ll_md_exp, &md);
1546 ptlrpc_req_finished(request);
1550 ia_valid = op_data->op_attr.ia_valid;
1551 /* inode size will be in ll_setattr_ost, can't do it now since dirty
1552 * cache is not cleared yet. */
1553 op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1554 if (S_ISREG(inode->i_mode))
1555 mutex_lock(&inode->i_mutex);
1556 rc = simple_setattr(dentry, &op_data->op_attr);
1557 if (S_ISREG(inode->i_mode))
1558 mutex_unlock(&inode->i_mutex);
1559 op_data->op_attr.ia_valid = ia_valid;
1561 rc = ll_update_inode(inode, &md);
1562 ptlrpc_req_finished(request);
1567 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1568 * object(s) determine the file size and mtime. Otherwise, the MDS will
1569 * keep these values until such a time that objects are allocated for it.
1570 * We do the MDS operations first, as it is checking permissions for us.
1571 * We don't to the MDS RPC if there is nothing that we want to store there,
1572 * otherwise there is no harm in updating mtime/atime on the MDS if we are
1573 * going to do an RPC anyways.
1575 * If we are doing a truncate, we will send the mtime and ctime updates
1576 * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1577 * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1580 * In case of HSMimport, we only set attr on MDS.
1582 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr, bool hsm_import)
1584 struct inode *inode = dentry->d_inode;
1585 struct ll_inode_info *lli = ll_i2info(inode);
1586 struct md_op_data *op_data = NULL;
1590 CDEBUG(D_VFSTRACE, "%s: setattr inode "DFID"(%p) from %llu to %llu, "
1591 "valid %x, hsm_import %d\n",
1592 ll_get_fsname(inode->i_sb, NULL, 0), PFID(&lli->lli_fid),
1593 inode, i_size_read(inode), attr->ia_size, attr->ia_valid,
1596 if (attr->ia_valid & ATTR_SIZE) {
1597 /* Check new size against VFS/VM file size limit and rlimit */
1598 rc = inode_newsize_ok(inode, attr->ia_size);
1602 /* The maximum Lustre file size is variable, based on the
1603 * OST maximum object size and number of stripes. This
1604 * needs another check in addition to the VFS check above. */
1605 if (attr->ia_size > ll_file_maxbytes(inode)) {
1606 CDEBUG(D_INODE,"file "DFID" too large %llu > "LPU64"\n",
1607 PFID(&lli->lli_fid), attr->ia_size,
1608 ll_file_maxbytes(inode));
1612 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1615 /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1616 if (attr->ia_valid & TIMES_SET_FLAGS) {
1617 if ((!uid_eq(current_fsuid(), inode->i_uid)) &&
1618 !cfs_capable(CFS_CAP_FOWNER))
1622 /* We mark all of the fields "set" so MDS/OST does not re-set them */
1623 if (!(attr->ia_valid & ATTR_CTIME_SET) &&
1624 (attr->ia_valid & ATTR_CTIME)) {
1625 attr->ia_ctime = CURRENT_TIME;
1626 attr->ia_valid |= ATTR_CTIME_SET;
1628 if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1629 (attr->ia_valid & ATTR_ATIME)) {
1630 attr->ia_atime = CURRENT_TIME;
1631 attr->ia_valid |= ATTR_ATIME_SET;
1633 if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1634 (attr->ia_valid & ATTR_MTIME)) {
1635 attr->ia_mtime = CURRENT_TIME;
1636 attr->ia_valid |= ATTR_MTIME_SET;
1639 if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1640 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %lu\n",
1641 LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1642 cfs_time_current_sec());
1644 if (S_ISREG(inode->i_mode)) {
1645 if (attr->ia_valid & ATTR_SIZE)
1646 inode_dio_write_done(inode);
1647 mutex_unlock(&inode->i_mutex);
1650 /* We always do an MDS RPC, even if we're only changing the size;
1651 * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1653 OBD_ALLOC_PTR(op_data);
1654 if (op_data == NULL)
1655 GOTO(out, rc = -ENOMEM);
1657 if (!hsm_import && attr->ia_valid & ATTR_SIZE) {
1658 /* If we are changing file size, file content is
1659 * modified, flag it. */
1660 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1661 op_data->op_bias |= MDS_DATA_MODIFIED;
1662 ll_file_clear_flag(lli, LLIF_DATA_MODIFIED);
1665 op_data->op_attr = *attr;
1667 rc = ll_md_setattr(dentry, op_data);
1671 if (!S_ISREG(inode->i_mode) || hsm_import)
1674 if (attr->ia_valid & (ATTR_SIZE |
1675 ATTR_ATIME | ATTR_ATIME_SET |
1676 ATTR_MTIME | ATTR_MTIME_SET |
1677 ATTR_CTIME | ATTR_CTIME_SET)) {
1678 /* For truncate and utimes sending attributes to OSTs, setting
1679 * mtime/atime to the past will be performed under PW [0:EOF]
1680 * extent lock (new_size:EOF for truncate). It may seem
1681 * excessive to send mtime/atime updates to OSTs when not
1682 * setting times to past, but it is necessary due to possible
1683 * time de-synchronization between MDT inode and OST objects */
1684 rc = cl_setattr_ost(lli->lli_clob, attr, 0);
1687 /* If the file was restored, it needs to set dirty flag.
1689 * We've already sent MDS_DATA_MODIFIED flag in
1690 * ll_md_setattr() for truncate. However, the MDT refuses to
1691 * set the HS_DIRTY flag on released files, so we have to set
1692 * it again if the file has been restored. Please check how
1693 * LLIF_DATA_MODIFIED is set in vvp_io_setattr_fini().
1695 * Please notice that if the file is not released, the previous
1696 * MDS_DATA_MODIFIED has taken effect and usually
1697 * LLIF_DATA_MODIFIED is not set(see vvp_io_setattr_fini()).
1698 * This way we can save an RPC for common open + trunc
1700 if (ll_file_test_and_clear_flag(lli, LLIF_DATA_MODIFIED)) {
1701 struct hsm_state_set hss = {
1702 .hss_valid = HSS_SETMASK,
1703 .hss_setmask = HS_DIRTY,
1707 rc2 = ll_hsm_state_set(inode, &hss);
1708 /* truncate and write can happen at the same time, so that
1709 * the file can be set modified even though the file is not
1710 * restored from released state, and ll_hsm_state_set() is
1711 * not applicable for the file, and rc2 < 0 is normal in this
1714 CDEBUG(D_INFO, DFID "HSM set dirty failed: rc2 = %d\n",
1715 PFID(ll_inode2fid(inode)), rc2);
1720 if (op_data != NULL)
1721 ll_finish_md_op_data(op_data);
1723 if (S_ISREG(inode->i_mode)) {
1724 mutex_lock(&inode->i_mutex);
1725 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1726 inode_dio_wait(inode);
1729 ll_stats_ops_tally(ll_i2sbi(inode), (attr->ia_valid & ATTR_SIZE) ?
1730 LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1735 int ll_setattr(struct dentry *de, struct iattr *attr)
1737 int mode = de->d_inode->i_mode;
1739 if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1740 (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1741 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1743 if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1744 (ATTR_SIZE|ATTR_MODE)) &&
1745 (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1746 (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1747 !(attr->ia_mode & S_ISGID))))
1748 attr->ia_valid |= ATTR_FORCE;
1750 if ((attr->ia_valid & ATTR_MODE) &&
1752 !(attr->ia_mode & S_ISUID) &&
1753 !(attr->ia_valid & ATTR_KILL_SUID))
1754 attr->ia_valid |= ATTR_KILL_SUID;
1756 if ((attr->ia_valid & ATTR_MODE) &&
1757 ((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1758 !(attr->ia_mode & S_ISGID) &&
1759 !(attr->ia_valid & ATTR_KILL_SGID))
1760 attr->ia_valid |= ATTR_KILL_SGID;
1762 return ll_setattr_raw(de, attr, false);
1765 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1766 __u64 max_age, __u32 flags)
1768 struct ll_sb_info *sbi = ll_s2sbi(sb);
1769 struct obd_statfs obd_osfs;
1773 rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1775 CERROR("md_statfs fails: rc = %d\n", rc);
1779 osfs->os_type = sb->s_magic;
1781 CDEBUG(D_SUPER, "MDC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1782 osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,osfs->os_files);
1784 if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1785 flags |= OBD_STATFS_NODELAY;
1787 rc = obd_statfs_rqset(sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1789 CERROR("obd_statfs fails: rc = %d\n", rc);
1793 CDEBUG(D_SUPER, "OSC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1794 obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1797 osfs->os_bsize = obd_osfs.os_bsize;
1798 osfs->os_blocks = obd_osfs.os_blocks;
1799 osfs->os_bfree = obd_osfs.os_bfree;
1800 osfs->os_bavail = obd_osfs.os_bavail;
1802 /* If we don't have as many objects free on the OST as inodes
1803 * on the MDS, we reduce the total number of inodes to
1804 * compensate, so that the "inodes in use" number is correct.
1806 if (obd_osfs.os_ffree < osfs->os_ffree) {
1807 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1809 osfs->os_ffree = obd_osfs.os_ffree;
1814 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1816 struct super_block *sb = de->d_sb;
1817 struct obd_statfs osfs;
1818 __u64 fsid = huge_encode_dev(sb->s_dev);
1821 CDEBUG(D_VFSTRACE, "VFS Op: at "LPU64" jiffies\n", get_jiffies_64());
1822 ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1824 /* Some amount of caching on the client is allowed */
1825 rc = ll_statfs_internal(sb, &osfs,
1826 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1831 statfs_unpack(sfs, &osfs);
1833 /* We need to downshift for all 32-bit kernels, because we can't
1834 * tell if the kernel is being called via sys_statfs64() or not.
1835 * Stop before overflowing f_bsize - in which case it is better
1836 * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1837 if (sizeof(long) < 8) {
1838 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1841 osfs.os_blocks >>= 1;
1842 osfs.os_bfree >>= 1;
1843 osfs.os_bavail >>= 1;
1847 sfs->f_blocks = osfs.os_blocks;
1848 sfs->f_bfree = osfs.os_bfree;
1849 sfs->f_bavail = osfs.os_bavail;
1850 sfs->f_fsid.val[0] = (__u32)fsid;
1851 sfs->f_fsid.val[1] = (__u32)(fsid >> 32);
1855 void ll_inode_size_lock(struct inode *inode)
1857 struct ll_inode_info *lli;
1859 LASSERT(!S_ISDIR(inode->i_mode));
1861 lli = ll_i2info(inode);
1862 mutex_lock(&lli->lli_size_mutex);
1865 void ll_inode_size_unlock(struct inode *inode)
1867 struct ll_inode_info *lli;
1869 lli = ll_i2info(inode);
1870 mutex_unlock(&lli->lli_size_mutex);
1873 int ll_update_inode(struct inode *inode, struct lustre_md *md)
1875 struct ll_inode_info *lli = ll_i2info(inode);
1876 struct mdt_body *body = md->body;
1877 struct ll_sb_info *sbi = ll_i2sbi(inode);
1879 if (body->mbo_valid & OBD_MD_FLEASIZE)
1880 cl_file_inode_init(inode, md);
1882 if (S_ISDIR(inode->i_mode)) {
1885 rc = ll_update_lsm_md(inode, md);
1890 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1891 if (body->mbo_valid & OBD_MD_FLRMTPERM)
1892 ll_update_remote_perm(inode, md->remote_perm);
1894 #ifdef CONFIG_FS_POSIX_ACL
1895 else if (body->mbo_valid & OBD_MD_FLACL) {
1896 spin_lock(&lli->lli_lock);
1897 if (lli->lli_posix_acl)
1898 posix_acl_release(lli->lli_posix_acl);
1899 lli->lli_posix_acl = md->posix_acl;
1900 spin_unlock(&lli->lli_lock);
1903 inode->i_ino = cl_fid_build_ino(&body->mbo_fid1,
1904 sbi->ll_flags & LL_SBI_32BIT_API);
1905 inode->i_generation = cl_fid_build_gen(&body->mbo_fid1);
1907 if (body->mbo_valid & OBD_MD_FLATIME) {
1908 if (body->mbo_atime > LTIME_S(inode->i_atime))
1909 LTIME_S(inode->i_atime) = body->mbo_atime;
1910 lli->lli_atime = body->mbo_atime;
1913 if (body->mbo_valid & OBD_MD_FLMTIME) {
1914 if (body->mbo_mtime > LTIME_S(inode->i_mtime)) {
1915 CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
1916 "to "LPU64"\n", inode->i_ino,
1917 LTIME_S(inode->i_mtime), body->mbo_mtime);
1918 LTIME_S(inode->i_mtime) = body->mbo_mtime;
1920 lli->lli_mtime = body->mbo_mtime;
1923 if (body->mbo_valid & OBD_MD_FLCTIME) {
1924 if (body->mbo_ctime > LTIME_S(inode->i_ctime))
1925 LTIME_S(inode->i_ctime) = body->mbo_ctime;
1926 lli->lli_ctime = body->mbo_ctime;
1929 if (body->mbo_valid & OBD_MD_FLMODE)
1930 inode->i_mode = (inode->i_mode & S_IFMT) |
1931 (body->mbo_mode & ~S_IFMT);
1933 if (body->mbo_valid & OBD_MD_FLTYPE)
1934 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1935 (body->mbo_mode & S_IFMT);
1937 LASSERT(inode->i_mode != 0);
1938 if (S_ISREG(inode->i_mode))
1939 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1,
1940 LL_MAX_BLKSIZE_BITS);
1942 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1944 if (body->mbo_valid & OBD_MD_FLUID)
1945 inode->i_uid = make_kuid(&init_user_ns, body->mbo_uid);
1946 if (body->mbo_valid & OBD_MD_FLGID)
1947 inode->i_gid = make_kgid(&init_user_ns, body->mbo_gid);
1948 if (body->mbo_valid & OBD_MD_FLFLAGS)
1949 inode->i_flags = ll_ext_to_inode_flags(body->mbo_flags);
1950 if (body->mbo_valid & OBD_MD_FLNLINK)
1951 set_nlink(inode, body->mbo_nlink);
1952 if (body->mbo_valid & OBD_MD_FLRDEV)
1953 inode->i_rdev = old_decode_dev(body->mbo_rdev);
1955 if (body->mbo_valid & OBD_MD_FLID) {
1956 /* FID shouldn't be changed! */
1957 if (fid_is_sane(&lli->lli_fid)) {
1958 LASSERTF(lu_fid_eq(&lli->lli_fid, &body->mbo_fid1),
1959 "Trying to change FID "DFID
1960 " to the "DFID", inode "DFID"(%p)\n",
1961 PFID(&lli->lli_fid), PFID(&body->mbo_fid1),
1962 PFID(ll_inode2fid(inode)), inode);
1964 lli->lli_fid = body->mbo_fid1;
1968 LASSERT(fid_seq(&lli->lli_fid) != 0);
1970 if (body->mbo_valid & OBD_MD_FLSIZE) {
1971 i_size_write(inode, body->mbo_size);
1973 CDEBUG(D_VFSTRACE, "inode="DFID", updating i_size %llu\n",
1974 PFID(ll_inode2fid(inode)),
1975 (unsigned long long)body->mbo_size);
1977 if (body->mbo_valid & OBD_MD_FLBLOCKS)
1978 inode->i_blocks = body->mbo_blocks;
1981 if (body->mbo_valid & OBD_MD_TSTATE) {
1982 /* Set LLIF_FILE_RESTORING if restore ongoing and
1983 * clear it when done to ensure to start again
1984 * glimpsing updated attrs
1986 if (body->mbo_t_state & MS_RESTORE)
1987 ll_file_set_flag(lli, LLIF_FILE_RESTORING);
1989 ll_file_clear_flag(lli, LLIF_FILE_RESTORING);
1995 int ll_read_inode2(struct inode *inode, void *opaque)
1997 struct lustre_md *md = opaque;
1998 struct ll_inode_info *lli = ll_i2info(inode);
2002 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
2003 PFID(&lli->lli_fid), inode);
2005 /* Core attributes from the MDS first. This is a new inode, and
2006 * the VFS doesn't zero times in the core inode so we have to do
2007 * it ourselves. They will be overwritten by either MDS or OST
2008 * attributes - we just need to make sure they aren't newer. */
2009 LTIME_S(inode->i_mtime) = 0;
2010 LTIME_S(inode->i_atime) = 0;
2011 LTIME_S(inode->i_ctime) = 0;
2013 rc = ll_update_inode(inode, md);
2017 /* OIDEBUG(inode); */
2019 #ifdef HAVE_BACKING_DEV_INFO
2020 /* initializing backing dev info. */
2021 inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
2023 if (S_ISREG(inode->i_mode)) {
2024 struct ll_sb_info *sbi = ll_i2sbi(inode);
2025 inode->i_op = &ll_file_inode_operations;
2026 inode->i_fop = sbi->ll_fop;
2027 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
2029 } else if (S_ISDIR(inode->i_mode)) {
2030 inode->i_op = &ll_dir_inode_operations;
2031 inode->i_fop = &ll_dir_operations;
2033 } else if (S_ISLNK(inode->i_mode)) {
2034 inode->i_op = &ll_fast_symlink_inode_operations;
2037 inode->i_op = &ll_special_inode_operations;
2039 init_special_inode(inode, inode->i_mode,
2048 void ll_delete_inode(struct inode *inode)
2050 struct ll_inode_info *lli = ll_i2info(inode);
2053 if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
2054 /* It is last chance to write out dirty pages,
2055 * otherwise we may lose data while umount */
2056 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF, CL_FSYNC_LOCAL, 1);
2058 truncate_inode_pages_final(&inode->i_data);
2060 LASSERTF(inode->i_data.nrpages == 0, "inode="DFID"(%p) nrpages=%lu, "
2061 "see https://jira.hpdd.intel.com/browse/LU-118\n",
2062 PFID(ll_inode2fid(inode)), inode, inode->i_data.nrpages);
2064 #ifdef HAVE_SBOPS_EVICT_INODE
2065 ll_clear_inode(inode);
2072 int ll_iocontrol(struct inode *inode, struct file *file,
2073 unsigned int cmd, unsigned long arg)
2075 struct ll_sb_info *sbi = ll_i2sbi(inode);
2076 struct ptlrpc_request *req = NULL;
2081 case FSFILT_IOC_GETFLAGS: {
2082 struct mdt_body *body;
2083 struct md_op_data *op_data;
2085 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
2086 0, 0, LUSTRE_OPC_ANY,
2088 if (IS_ERR(op_data))
2089 RETURN(PTR_ERR(op_data));
2091 op_data->op_valid = OBD_MD_FLFLAGS;
2092 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
2093 ll_finish_md_op_data(op_data);
2095 CERROR("%s: failure inode "DFID": rc = %d\n",
2096 sbi->ll_md_exp->exp_obd->obd_name,
2097 PFID(ll_inode2fid(inode)), rc);
2101 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
2103 flags = body->mbo_flags;
2105 ptlrpc_req_finished(req);
2107 RETURN(put_user(flags, (int __user *)arg));
2109 case FSFILT_IOC_SETFLAGS: {
2111 struct md_op_data *op_data;
2112 struct cl_object *obj;
2114 if (get_user(flags, (int __user *)arg))
2117 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
2118 LUSTRE_OPC_ANY, NULL);
2119 if (IS_ERR(op_data))
2120 RETURN(PTR_ERR(op_data));
2122 op_data->op_attr_flags = flags;
2123 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
2124 rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &req);
2125 ll_finish_md_op_data(op_data);
2126 ptlrpc_req_finished(req);
2130 inode->i_flags = ll_ext_to_inode_flags(flags);
2132 obj = ll_i2info(inode)->lli_clob;
2136 OBD_ALLOC_PTR(attr);
2140 attr->ia_valid = ATTR_ATTR_FLAG;
2141 rc = cl_setattr_ost(obj, attr, flags);
2153 int ll_flush_ctx(struct inode *inode)
2155 struct ll_sb_info *sbi = ll_i2sbi(inode);
2157 CDEBUG(D_SEC, "flush context for user %d\n",
2158 from_kuid(&init_user_ns, current_uid()));
2160 obd_set_info_async(NULL, sbi->ll_md_exp,
2161 sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2163 obd_set_info_async(NULL, sbi->ll_dt_exp,
2164 sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2169 /* umount -f client means force down, don't save state */
2170 void ll_umount_begin(struct super_block *sb)
2172 struct ll_sb_info *sbi = ll_s2sbi(sb);
2173 struct obd_device *obd;
2174 struct obd_ioctl_data *ioc_data;
2177 CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2178 sb->s_count, atomic_read(&sb->s_active));
2180 obd = class_exp2obd(sbi->ll_md_exp);
2182 CERROR("Invalid MDC connection handle "LPX64"\n",
2183 sbi->ll_md_exp->exp_handle.h_cookie);
2189 obd = class_exp2obd(sbi->ll_dt_exp);
2191 CERROR("Invalid LOV connection handle "LPX64"\n",
2192 sbi->ll_dt_exp->exp_handle.h_cookie);
2198 OBD_ALLOC_PTR(ioc_data);
2200 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2201 sizeof *ioc_data, ioc_data, NULL);
2203 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2204 sizeof *ioc_data, ioc_data, NULL);
2206 OBD_FREE_PTR(ioc_data);
2209 /* Really, we'd like to wait until there are no requests outstanding,
2210 * and then continue. For now, we just invalidate the requests,
2211 * schedule() and sleep one second if needed, and hope.
2217 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2219 struct ll_sb_info *sbi = ll_s2sbi(sb);
2220 char *profilenm = get_profile_name(sb);
2224 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2225 read_only = *flags & MS_RDONLY;
2226 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2227 sizeof(KEY_READ_ONLY),
2228 KEY_READ_ONLY, sizeof(read_only),
2231 LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2232 profilenm, read_only ?
2233 "read-only" : "read-write", err);
2238 sb->s_flags |= MS_RDONLY;
2240 sb->s_flags &= ~MS_RDONLY;
2242 if (sbi->ll_flags & LL_SBI_VERBOSE)
2243 LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2244 read_only ? "read-only" : "read-write");
2250 * Cleanup the open handle that is cached on MDT-side.
2252 * For open case, the client side open handling thread may hit error
2253 * after the MDT grant the open. Under such case, the client should
2254 * send close RPC to the MDT as cleanup; otherwise, the open handle
2255 * on the MDT will be leaked there until the client umount or evicted.
2257 * In further, if someone unlinked the file, because the open handle
2258 * holds the reference on such file/object, then it will block the
2259 * subsequent threads that want to locate such object via FID.
2261 * \param[in] sb super block for this file-system
2262 * \param[in] open_req pointer to the original open request
2264 void ll_open_cleanup(struct super_block *sb, struct ptlrpc_request *open_req)
2266 struct mdt_body *body;
2267 struct md_op_data *op_data;
2268 struct ptlrpc_request *close_req = NULL;
2269 struct obd_export *exp = ll_s2sbi(sb)->ll_md_exp;
2272 body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
2273 OBD_ALLOC_PTR(op_data);
2274 if (op_data == NULL) {
2275 CWARN("%s: cannot allocate op_data to release open handle for "
2277 ll_get_fsname(sb, NULL, 0), PFID(&body->mbo_fid1));
2282 op_data->op_fid1 = body->mbo_fid1;
2283 op_data->op_handle = body->mbo_handle;
2284 op_data->op_mod_time = cfs_time_current_sec();
2285 md_close(exp, op_data, NULL, &close_req);
2286 ptlrpc_req_finished(close_req);
2287 ll_finish_md_op_data(op_data);
2292 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2293 struct super_block *sb, struct lookup_intent *it)
2295 struct ll_sb_info *sbi = NULL;
2296 struct lustre_md md = { NULL };
2300 LASSERT(*inode || sb);
2301 sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2302 rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2303 sbi->ll_md_exp, &md);
2308 rc = ll_update_inode(*inode, &md);
2312 LASSERT(sb != NULL);
2315 * At this point server returns to client's same fid as client
2316 * generated for creating. So using ->fid1 is okay here.
2318 LASSERT(fid_is_sane(&md.body->mbo_fid1));
2320 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->mbo_fid1,
2321 sbi->ll_flags & LL_SBI_32BIT_API),
2323 if (IS_ERR(*inode)) {
2324 #ifdef CONFIG_FS_POSIX_ACL
2326 posix_acl_release(md.posix_acl);
2327 md.posix_acl = NULL;
2330 rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2332 CERROR("new_inode -fatal: rc %d\n", rc);
2337 /* Handling piggyback layout lock.
2338 * Layout lock can be piggybacked by getattr and open request.
2339 * The lsm can be applied to inode only if it comes with a layout lock
2340 * otherwise correct layout may be overwritten, for example:
2341 * 1. proc1: mdt returns a lsm but not granting layout
2342 * 2. layout was changed by another client
2343 * 3. proc2: refresh layout and layout lock granted
2344 * 4. proc1: to apply a stale layout */
2345 if (it != NULL && it->it_lock_mode != 0) {
2346 struct lustre_handle lockh;
2347 struct ldlm_lock *lock;
2349 lockh.cookie = it->it_lock_handle;
2350 lock = ldlm_handle2lock(&lockh);
2351 LASSERT(lock != NULL);
2352 if (ldlm_has_layout(lock)) {
2353 struct cl_object_conf conf;
2355 memset(&conf, 0, sizeof(conf));
2356 conf.coc_opc = OBJECT_CONF_SET;
2357 conf.coc_inode = *inode;
2358 conf.coc_lock = lock;
2359 conf.u.coc_layout = md.layout;
2360 (void)ll_layout_conf(*inode, &conf);
2362 LDLM_LOCK_PUT(lock);
2368 md_free_lustre_md(sbi->ll_md_exp, &md);
2371 if (rc != 0 && it != NULL && it->it_op & IT_OPEN)
2372 ll_open_cleanup(sb != NULL ? sb : (*inode)->i_sb, req);
2377 int ll_obd_statfs(struct inode *inode, void __user *arg)
2379 struct ll_sb_info *sbi = NULL;
2380 struct obd_export *exp;
2382 struct obd_ioctl_data *data = NULL;
2386 if (!inode || !(sbi = ll_i2sbi(inode)))
2387 GOTO(out_statfs, rc = -EINVAL);
2389 rc = obd_ioctl_getdata(&buf, &len, arg);
2391 GOTO(out_statfs, rc);
2394 if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2395 !data->ioc_pbuf1 || !data->ioc_pbuf2)
2396 GOTO(out_statfs, rc = -EINVAL);
2398 if (data->ioc_inllen1 != sizeof(__u32) ||
2399 data->ioc_inllen2 != sizeof(__u32) ||
2400 data->ioc_plen1 != sizeof(struct obd_statfs) ||
2401 data->ioc_plen2 != sizeof(struct obd_uuid))
2402 GOTO(out_statfs, rc = -EINVAL);
2404 memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2405 if (type & LL_STATFS_LMV)
2406 exp = sbi->ll_md_exp;
2407 else if (type & LL_STATFS_LOV)
2408 exp = sbi->ll_dt_exp;
2410 GOTO(out_statfs, rc = -ENODEV);
2412 rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, NULL);
2414 GOTO(out_statfs, rc);
2417 obd_ioctl_freedata(buf, len);
2421 int ll_process_config(struct lustre_cfg *lcfg)
2423 struct super_block *sb;
2428 /* The instance name contains the sb: lustre-client-aacfe000 */
2429 ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2430 if (!ptr || !*(++ptr))
2432 if (sscanf(ptr, "%lx", &x) != 1)
2434 sb = (struct super_block *)x;
2435 /* This better be a real Lustre superblock! */
2436 LASSERT(s2lsi(sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2438 /* Note we have not called client_common_fill_super yet, so
2439 proc fns must be able to handle that! */
2440 rc = class_process_proc_param(PARAM_LLITE, lprocfs_llite_obd_vars,
2447 /* this function prepares md_op_data hint for passing it down to MD stack. */
2448 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
2449 struct inode *i1, struct inode *i2,
2450 const char *name, size_t namelen,
2451 __u32 mode, __u32 opc, void *data)
2453 LASSERT(i1 != NULL);
2456 /* Do not reuse namelen for something else. */
2458 return ERR_PTR(-EINVAL);
2460 if (namelen > ll_i2sbi(i1)->ll_namelen)
2461 return ERR_PTR(-ENAMETOOLONG);
2463 if (!lu_name_is_valid_2(name, namelen))
2464 return ERR_PTR(-EINVAL);
2467 if (op_data == NULL)
2468 OBD_ALLOC_PTR(op_data);
2470 if (op_data == NULL)
2471 return ERR_PTR(-ENOMEM);
2473 ll_i2gids(op_data->op_suppgids, i1, i2);
2474 op_data->op_fid1 = *ll_inode2fid(i1);
2475 op_data->op_default_stripe_offset = -1;
2476 if (S_ISDIR(i1->i_mode)) {
2477 op_data->op_mea1 = ll_i2info(i1)->lli_lsm_md;
2478 if (opc == LUSTRE_OPC_MKDIR)
2479 op_data->op_default_stripe_offset =
2480 ll_i2info(i1)->lli_def_stripe_offset;
2484 op_data->op_fid2 = *ll_inode2fid(i2);
2485 if (S_ISDIR(i2->i_mode))
2486 op_data->op_mea2 = ll_i2info(i2)->lli_lsm_md;
2488 fid_zero(&op_data->op_fid2);
2491 if (ll_i2sbi(i1)->ll_flags & LL_SBI_64BIT_HASH)
2492 op_data->op_cli_flags |= CLI_HASH64;
2494 if (ll_need_32bit_api(ll_i2sbi(i1)))
2495 op_data->op_cli_flags |= CLI_API32;
2497 op_data->op_name = name;
2498 op_data->op_namelen = namelen;
2499 op_data->op_mode = mode;
2500 op_data->op_mod_time = cfs_time_current_sec();
2501 op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2502 op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2503 op_data->op_cap = cfs_curproc_cap_pack();
2504 if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2505 filename_is_volatile(name, namelen, &op_data->op_mds)) {
2506 op_data->op_bias |= MDS_CREATE_VOLATILE;
2508 op_data->op_mds = 0;
2510 op_data->op_data = data;
2515 void ll_finish_md_op_data(struct md_op_data *op_data)
2517 OBD_FREE_PTR(op_data);
2520 #ifdef HAVE_SUPEROPS_USE_DENTRY
2521 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2523 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
2526 struct ll_sb_info *sbi;
2528 #ifdef HAVE_SUPEROPS_USE_DENTRY
2529 LASSERT((seq != NULL) && (dentry != NULL));
2530 sbi = ll_s2sbi(dentry->d_sb);
2532 LASSERT((seq != NULL) && (vfs != NULL));
2533 sbi = ll_s2sbi(vfs->mnt_sb);
2536 if (sbi->ll_flags & LL_SBI_NOLCK)
2537 seq_puts(seq, ",nolock");
2539 if (sbi->ll_flags & LL_SBI_FLOCK)
2540 seq_puts(seq, ",flock");
2542 if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2543 seq_puts(seq, ",localflock");
2545 if (sbi->ll_flags & LL_SBI_USER_XATTR)
2546 seq_puts(seq, ",user_xattr");
2548 if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2549 seq_puts(seq, ",lazystatfs");
2551 if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2552 seq_puts(seq, ",user_fid2path");
2554 if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
2555 seq_puts(seq, ",always_ping");
2561 * Get obd name by cmd, and copy out to user space
2563 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2565 struct ll_sb_info *sbi = ll_i2sbi(inode);
2566 struct obd_device *obd;
2569 if (cmd == OBD_IOC_GETDTNAME)
2570 obd = class_exp2obd(sbi->ll_dt_exp);
2571 else if (cmd == OBD_IOC_GETMDNAME)
2572 obd = class_exp2obd(sbi->ll_md_exp);
2579 if (copy_to_user((void __user *)arg, obd->obd_name,
2580 strlen(obd->obd_name) + 1))
2587 * Get lustre file system name by \a sbi. If \a buf is provided(non-NULL), the
2588 * fsname will be returned in this buffer; otherwise, a static buffer will be
2589 * used to store the fsname and returned to caller.
2591 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
2593 static char fsname_static[MTI_NAME_MAXLEN];
2594 struct lustre_sb_info *lsi = s2lsi(sb);
2599 /* this means the caller wants to use static buffer
2600 * and it doesn't care about race. Usually this is
2601 * in error reporting path */
2602 buf = fsname_static;
2603 buflen = sizeof(fsname_static);
2606 len = strlen(lsi->lsi_lmd->lmd_profile);
2607 ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
2608 if (ptr && (strcmp(ptr, "-client") == 0))
2611 if (unlikely(len >= buflen))
2613 strncpy(buf, lsi->lsi_lmd->lmd_profile, len);
2619 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
2626 p.mnt = current->fs->root.mnt;
2628 path = d_path(&p, buf, bufsize);
2633 void ll_dirty_page_discard_warn(struct page *page, int ioret)
2635 char *buf, *path = NULL;
2636 struct dentry *dentry = NULL;
2637 struct inode *inode = page->mapping->host;
2639 /* this can be called inside spin lock so use GFP_ATOMIC. */
2640 buf = (char *)__get_free_page(GFP_ATOMIC);
2642 dentry = d_find_alias(page->mapping->host);
2644 path = ll_d_path(dentry, buf, PAGE_SIZE);
2648 "%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
2649 "(rc %d)\n", ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
2650 s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2651 PFID(ll_inode2fid(inode)),
2652 (path && !IS_ERR(path)) ? path : "", ioret);
2658 free_page((unsigned long)buf);
2661 ssize_t ll_copy_user_md(const struct lov_user_md __user *md,
2662 struct lov_user_md **kbuf)
2664 struct lov_user_md lum;
2668 if (copy_from_user(&lum, md, sizeof(lum)))
2671 lum_size = ll_lov_user_md_size(&lum);
2675 OBD_ALLOC(*kbuf, lum_size);
2679 if (copy_from_user(*kbuf, md, lum_size) != 0) {
2680 OBD_FREE(*kbuf, lum_size);
2688 * Compute llite root squash state after a change of root squash
2689 * configuration setting or add/remove of a lnet nid
2691 void ll_compute_rootsquash_state(struct ll_sb_info *sbi)
2693 struct root_squash_info *squash = &sbi->ll_squash;
2696 lnet_process_id_t id;
2698 /* Update norootsquash flag */
2699 down_write(&squash->rsi_sem);
2700 if (list_empty(&squash->rsi_nosquash_nids))
2701 sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2703 /* Do not apply root squash as soon as one of our NIDs is
2704 * in the nosquash_nids list */
2707 while (LNetGetId(i++, &id) != -ENOENT) {
2708 if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
2710 if (cfs_match_nid(id.nid, &squash->rsi_nosquash_nids)) {
2716 sbi->ll_flags |= LL_SBI_NOROOTSQUASH;
2718 sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2720 up_write(&squash->rsi_sem);
2724 * Parse linkea content to extract information about a given hardlink
2726 * \param[in] ldata - Initialized linkea data
2727 * \param[in] linkno - Link identifier
2728 * \param[out] parent_fid - The entry's parent FID
2729 * \param[out] ln - Entry name destination buffer
2731 * \retval 0 on success
2732 * \retval Appropriate negative error code on failure
2734 static int ll_linkea_decode(struct linkea_data *ldata, unsigned int linkno,
2735 struct lu_fid *parent_fid, struct lu_name *ln)
2741 rc = linkea_init(ldata);
2745 if (linkno >= ldata->ld_leh->leh_reccount)
2746 /* beyond last link */
2749 linkea_first_entry(ldata);
2750 for (idx = 0; ldata->ld_lee != NULL; idx++) {
2751 linkea_entry_unpack(ldata->ld_lee, &ldata->ld_reclen, ln,
2756 linkea_next_entry(ldata);
2766 * Get parent FID and name of an identified link. Operation is performed for
2767 * a given link number, letting the caller iterate over linkno to list one or
2768 * all links of an entry.
2770 * \param[in] file - File descriptor against which to perform the operation
2771 * \param[in,out] arg - User-filled structure containing the linkno to operate
2772 * on and the available size. It is eventually filled with
2773 * the requested information or left untouched on error
2775 * \retval - 0 on success
2776 * \retval - Appropriate negative error code on failure
2778 int ll_getparent(struct file *file, struct getparent __user *arg)
2780 struct dentry *dentry = file->f_path.dentry;
2781 struct inode *inode = dentry->d_inode;
2782 struct linkea_data *ldata;
2783 struct lu_buf buf = LU_BUF_NULL;
2785 struct lu_fid parent_fid;
2792 if (!cfs_capable(CFS_CAP_DAC_READ_SEARCH) &&
2793 !(ll_i2sbi(inode)->ll_flags & LL_SBI_USER_FID2PATH))
2796 if (get_user(name_size, &arg->gp_name_size))
2799 if (get_user(linkno, &arg->gp_linkno))
2802 if (name_size > PATH_MAX)
2805 OBD_ALLOC(ldata, sizeof(*ldata));
2809 rc = linkea_data_new(ldata, &buf);
2811 GOTO(ldata_free, rc);
2813 rc = ll_getxattr(dentry, XATTR_NAME_LINK, buf.lb_buf, buf.lb_len);
2817 rc = ll_linkea_decode(ldata, linkno, &parent_fid, &ln);
2821 if (ln.ln_namelen >= name_size)
2822 GOTO(lb_free, rc = -EOVERFLOW);
2824 if (copy_to_user(&arg->gp_fid, &parent_fid, sizeof(arg->gp_fid)))
2825 GOTO(lb_free, rc = -EFAULT);
2827 if (copy_to_user(&arg->gp_name, ln.ln_name, ln.ln_namelen))
2828 GOTO(lb_free, rc = -EFAULT);
2830 if (put_user('\0', arg->gp_name + ln.ln_namelen))
2831 GOTO(lb_free, rc = -EFAULT);
2836 OBD_FREE(ldata, sizeof(*ldata));