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.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2016, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * lustre/llite/llite_lib.c
34 * Lustre Light Super operations
37 #define DEBUG_SUBSYSTEM S_LLITE
39 #include <linux/module.h>
40 #include <linux/statfs.h>
41 #include <linux/time.h>
42 #include <linux/types.h>
43 #include <linux/version.h>
45 #include <linux/user_namespace.h>
46 #ifdef HAVE_UIDGID_HEADER
47 # include <linux/uidgid.h>
49 #include <linux/security.h>
51 #include <uapi/linux/lustre/lustre_ioctl.h>
52 #include <lustre_ha.h>
53 #include <lustre_dlm.h>
54 #include <lprocfs_status.h>
55 #include <lustre_disk.h>
56 #include <uapi/linux/lustre/lustre_param.h>
57 #include <lustre_log.h>
58 #include <cl_object.h>
59 #include <obd_cksum.h>
60 #include "llite_internal.h"
62 struct kmem_cache *ll_file_data_slab;
65 #define log2(n) ffz(~(n))
68 static struct ll_sb_info *ll_init_sbi(void)
70 struct ll_sb_info *sbi = NULL;
72 unsigned long lru_page_max;
82 spin_lock_init(&sbi->ll_lock);
83 mutex_init(&sbi->ll_lco.lco_lock);
84 spin_lock_init(&sbi->ll_pp_extent_lock);
85 spin_lock_init(&sbi->ll_process_lock);
86 sbi->ll_rw_stats_on = 0;
89 pages = si.totalram - si.totalhigh;
90 lru_page_max = pages / 2;
92 /* initialize ll_cache data */
93 sbi->ll_cache = cl_cache_init(lru_page_max);
94 if (sbi->ll_cache == NULL) {
95 OBD_FREE(sbi, sizeof(*sbi));
99 sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
100 SBI_DEFAULT_READAHEAD_MAX);
101 sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
102 sbi->ll_ra_info.ra_max_read_ahead_whole_pages = -1;
104 ll_generate_random_uuid(uuid);
105 class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
106 CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
108 sbi->ll_flags |= LL_SBI_VERBOSE;
109 #ifdef ENABLE_CHECKSUM
110 sbi->ll_flags |= LL_SBI_CHECKSUM;
113 #ifdef HAVE_LRU_RESIZE_SUPPORT
114 sbi->ll_flags |= LL_SBI_LRU_RESIZE;
116 sbi->ll_flags |= LL_SBI_LAZYSTATFS;
118 for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
119 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
121 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
125 /* metadata statahead is enabled by default */
126 sbi->ll_sa_max = LL_SA_RPC_DEF;
127 atomic_set(&sbi->ll_sa_total, 0);
128 atomic_set(&sbi->ll_sa_wrong, 0);
129 atomic_set(&sbi->ll_sa_running, 0);
130 atomic_set(&sbi->ll_agl_total, 0);
131 sbi->ll_flags |= LL_SBI_AGL_ENABLED;
132 sbi->ll_flags |= LL_SBI_FAST_READ;
135 sbi->ll_squash.rsi_uid = 0;
136 sbi->ll_squash.rsi_gid = 0;
137 INIT_LIST_HEAD(&sbi->ll_squash.rsi_nosquash_nids);
138 init_rwsem(&sbi->ll_squash.rsi_sem);
143 static void ll_free_sbi(struct super_block *sb)
145 struct ll_sb_info *sbi = ll_s2sbi(sb);
149 if (!list_empty(&sbi->ll_squash.rsi_nosquash_nids))
150 cfs_free_nidlist(&sbi->ll_squash.rsi_nosquash_nids);
151 if (sbi->ll_cache != NULL) {
152 cl_cache_decref(sbi->ll_cache);
153 sbi->ll_cache = NULL;
155 OBD_FREE(sbi, sizeof(*sbi));
160 static inline int obd_connect_has_secctx(struct obd_connect_data *data)
162 return data->ocd_connect_flags & OBD_CONNECT_FLAGS2 &&
163 data->ocd_connect_flags2 & OBD_CONNECT2_FILE_SECCTX;
166 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
167 struct vfsmount *mnt)
169 struct inode *root = NULL;
170 struct ll_sb_info *sbi = ll_s2sbi(sb);
171 struct obd_device *obd;
172 struct obd_statfs *osfs = NULL;
173 struct ptlrpc_request *request = NULL;
174 struct obd_connect_data *data = NULL;
175 struct obd_uuid *uuid;
176 struct md_op_data *op_data;
177 struct lustre_md lmd;
179 int size, err, checksum;
182 obd = class_name2obd(md);
184 CERROR("MD %s: not setup or attached\n", md);
198 /* indicate MDT features supported by this client */
199 data->ocd_connect_flags = OBD_CONNECT_IBITS | OBD_CONNECT_NODEVOH |
200 OBD_CONNECT_ATTRFID |
201 OBD_CONNECT_VERSION | OBD_CONNECT_BRW_SIZE |
202 OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
203 OBD_CONNECT_CANCELSET | OBD_CONNECT_FID |
204 OBD_CONNECT_AT | OBD_CONNECT_LOV_V3 |
205 OBD_CONNECT_VBR | OBD_CONNECT_FULL20 |
206 OBD_CONNECT_64BITHASH |
207 OBD_CONNECT_EINPROGRESS |
208 OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
209 OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS|
210 OBD_CONNECT_MAX_EASIZE |
211 OBD_CONNECT_FLOCK_DEAD |
212 OBD_CONNECT_DISP_STRIPE | OBD_CONNECT_LFSCK |
213 OBD_CONNECT_OPEN_BY_FID |
214 OBD_CONNECT_DIR_STRIPE |
215 OBD_CONNECT_BULK_MBITS |
216 OBD_CONNECT_SUBTREE |
217 OBD_CONNECT_FLAGS2 | OBD_CONNECT_MULTIMODRPCS;
219 data->ocd_connect_flags2 = 0;
221 #ifdef HAVE_LRU_RESIZE_SUPPORT
222 if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
223 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
225 #ifdef CONFIG_FS_POSIX_ACL
226 data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK |
227 OBD_CONNECT_LARGE_ACL;
230 if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
231 /* flag mdc connection as lightweight, only used for test
232 * purpose, use with care */
233 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
235 data->ocd_ibits_known = MDS_INODELOCK_FULL;
236 data->ocd_version = LUSTRE_VERSION_CODE;
238 if (sb->s_flags & MS_RDONLY)
239 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
240 if (sbi->ll_flags & LL_SBI_USER_XATTR)
241 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
244 /* Setting this indicates we correctly support S_NOSEC (See kernel
245 * commit 9e1f1de02c2275d7172e18dc4e7c2065777611bf)
247 sb->s_flags |= MS_NOSEC;
250 if (sbi->ll_flags & LL_SBI_FLOCK)
251 sbi->ll_fop = &ll_file_operations_flock;
252 else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
253 sbi->ll_fop = &ll_file_operations;
255 sbi->ll_fop = &ll_file_operations_noflock;
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 #ifdef HAVE_SECURITY_DENTRY_INIT_SECURITY
262 data->ocd_connect_flags2 |= OBD_CONNECT2_FILE_SECCTX;
263 #endif /* HAVE_SECURITY_DENTRY_INIT_SECURITY */
265 data->ocd_brw_size = MD_MAX_BRW_SIZE;
267 err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid, data, NULL);
269 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
270 "recovery, of which this client is not a "
271 "part. Please wait for recovery to complete,"
272 " abort, or time out.\n", md);
275 CERROR("cannot connect to %s: rc = %d\n", md, err);
279 sbi->ll_md_exp->exp_connect_data = *data;
281 err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
282 LUSTRE_SEQ_METADATA);
284 CERROR("%s: Can't init metadata layer FID infrastructure, "
285 "rc = %d\n", sbi->ll_md_exp->exp_obd->obd_name, err);
289 /* For mount, we only need fs info from MDT0, and also in DNE, it
290 * can make sure the client can be mounted as long as MDT0 is
292 err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
293 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
294 OBD_STATFS_FOR_MDT0);
296 GOTO(out_md_fid, err);
298 /* This needs to be after statfs to ensure connect has finished.
299 * Note that "data" does NOT contain the valid connect reply.
300 * If connecting to a 1.8 server there will be no LMV device, so
301 * we can access the MDC export directly and exp_connect_flags will
302 * be non-zero, but if accessing an upgraded 2.1 server it will
303 * have the correct flags filled in.
304 * XXX: fill in the LMV exp_connect_flags from MDC(s). */
305 valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
306 if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
307 valid != CLIENT_CONNECT_MDT_REQD) {
310 OBD_ALLOC_WAIT(buf, PAGE_SIZE);
311 obd_connect_flags2str(buf, PAGE_SIZE,
312 valid ^ CLIENT_CONNECT_MDT_REQD, 0, ",");
313 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
314 "feature(s) needed for correct operation "
315 "of this client (%s). Please upgrade "
316 "server or downgrade client.\n",
317 sbi->ll_md_exp->exp_obd->obd_name, buf);
318 OBD_FREE(buf, PAGE_SIZE);
319 GOTO(out_md_fid, err = -EPROTO);
322 size = sizeof(*data);
323 err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
324 KEY_CONN_DATA, &size, data);
326 CERROR("%s: Get connect data failed: rc = %d\n",
327 sbi->ll_md_exp->exp_obd->obd_name, err);
328 GOTO(out_md_fid, err);
331 LASSERT(osfs->os_bsize);
332 sb->s_blocksize = osfs->os_bsize;
333 sb->s_blocksize_bits = log2(osfs->os_bsize);
334 sb->s_magic = LL_SUPER_MAGIC;
335 sb->s_maxbytes = MAX_LFS_FILESIZE;
336 sbi->ll_namelen = osfs->os_namelen;
337 sbi->ll_mnt.mnt = current->fs->root.mnt;
339 if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
340 !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
341 LCONSOLE_INFO("Disabling user_xattr feature because "
342 "it is not supported on the server\n");
343 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
346 if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
348 sb->s_flags |= MS_POSIXACL;
350 sbi->ll_flags |= LL_SBI_ACL;
352 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
354 sb->s_flags &= ~MS_POSIXACL;
356 sbi->ll_flags &= ~LL_SBI_ACL;
359 if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
360 sbi->ll_flags |= LL_SBI_64BIT_HASH;
362 if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK)
363 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
365 if (obd_connect_has_secctx(data))
366 sbi->ll_flags |= LL_SBI_FILE_SECCTX;
368 if (data->ocd_ibits_known & MDS_INODELOCK_XATTR) {
369 if (!(data->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)) {
370 LCONSOLE_INFO("%s: disabling xattr cache due to "
371 "unknown maximum xattr size.\n", dt);
372 } else if (!sbi->ll_xattr_cache_set) {
373 /* If xattr_cache is already set (no matter 0 or 1)
374 * during processing llog, it won't be enabled here. */
375 sbi->ll_flags |= LL_SBI_XATTR_CACHE;
376 sbi->ll_xattr_cache_enabled = 1;
380 obd = class_name2obd(dt);
382 CERROR("DT %s: not setup or attached\n", dt);
383 GOTO(out_md_fid, err = -ENODEV);
386 /* pass client page size via ocd_grant_blkbits, the server should report
387 * back its backend blocksize for grant calculation purpose */
388 data->ocd_grant_blkbits = PAGE_SHIFT;
390 /* indicate OST features supported by this client */
391 data->ocd_connect_flags = OBD_CONNECT_GRANT | OBD_CONNECT_VERSION |
392 OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
393 OBD_CONNECT_CANCELSET | OBD_CONNECT_FID |
394 OBD_CONNECT_SRVLOCK | OBD_CONNECT_TRUNCLOCK|
395 OBD_CONNECT_AT | OBD_CONNECT_OSS_CAPA |
396 OBD_CONNECT_VBR | OBD_CONNECT_FULL20 |
397 OBD_CONNECT_64BITHASH | OBD_CONNECT_MAXBYTES |
398 OBD_CONNECT_EINPROGRESS |
399 OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
400 OBD_CONNECT_LAYOUTLOCK |
401 OBD_CONNECT_PINGLESS | OBD_CONNECT_LFSCK |
402 OBD_CONNECT_BULK_MBITS |
405 /* The client currently advertises support for OBD_CONNECT_LOCKAHEAD_OLD so it
406 * can interoperate with an older version of lockahead which was released prior
407 * to landing in master. This support will be dropped when 2.13 development
408 * starts. At the point, we should not just drop the connect flag (below), we
409 * should also remove the support in the code.
411 * Removing it means a few things:
412 * 1. Remove this section here
413 * 2. Remove CEF_NONBLOCK in ll_file_lockahead()
414 * 3. Remove function exp_connect_lockahead_old
415 * 4. Remove LDLM_FL_LOCKAHEAD_OLD_RESERVED in lustre_dlm_flags.h
417 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 12, 50, 0)
418 data->ocd_connect_flags |= OBD_CONNECT_LOCKAHEAD_OLD;
421 data->ocd_connect_flags2 = OBD_CONNECT2_LOCKAHEAD;
423 if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_GRANT_PARAM))
424 data->ocd_connect_flags |= OBD_CONNECT_GRANT_PARAM;
426 /* OBD_CONNECT_CKSUM should always be set, even if checksums are
427 * disabled by default, because it can still be enabled on the
428 * fly via /proc. As a consequence, we still need to come to an
429 * agreement on the supported algorithms at connect time */
430 data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
432 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
433 data->ocd_cksum_types = OBD_CKSUM_ADLER;
435 data->ocd_cksum_types = cksum_types_supported_client();
437 #ifdef HAVE_LRU_RESIZE_SUPPORT
438 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
440 /* always ping even if server suppress_pings */
441 if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
442 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
444 CDEBUG(D_RPCTRACE, "ocd_connect_flags: %#llx ocd_version: %d "
445 "ocd_grant: %d\n", data->ocd_connect_flags,
446 data->ocd_version, data->ocd_grant);
448 obd->obd_upcall.onu_owner = &sbi->ll_lco;
449 obd->obd_upcall.onu_upcall = cl_ocd_update;
451 data->ocd_brw_size = DT_MAX_BRW_SIZE;
453 err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data,
456 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
457 "recovery, of which this client is not a "
458 "part. Please wait for recovery to "
459 "complete, abort, or time out.\n", dt);
462 CERROR("%s: Cannot connect to %s: rc = %d\n",
463 sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
467 sbi->ll_dt_exp->exp_connect_data = *data;
469 /* Don't change value if it was specified in the config log */
470 if (sbi->ll_ra_info.ra_max_read_ahead_whole_pages == -1)
471 sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
472 max_t(unsigned long, SBI_DEFAULT_READAHEAD_WHOLE_MAX,
473 (data->ocd_brw_size >> PAGE_SHIFT));
475 err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
476 LUSTRE_SEQ_METADATA);
478 CERROR("%s: Can't init data layer FID infrastructure, "
479 "rc = %d\n", sbi->ll_dt_exp->exp_obd->obd_name, err);
483 mutex_lock(&sbi->ll_lco.lco_lock);
484 sbi->ll_lco.lco_flags = data->ocd_connect_flags;
485 sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
486 sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
487 mutex_unlock(&sbi->ll_lco.lco_lock);
489 fid_zero(&sbi->ll_root_fid);
490 err = md_get_root(sbi->ll_md_exp, get_mount_fileset(sb),
493 CERROR("cannot mds_connect: rc = %d\n", err);
494 GOTO(out_lock_cn_cb, err);
496 if (!fid_is_sane(&sbi->ll_root_fid)) {
497 CERROR("%s: Invalid root fid "DFID" during mount\n",
498 sbi->ll_md_exp->exp_obd->obd_name,
499 PFID(&sbi->ll_root_fid));
500 GOTO(out_lock_cn_cb, err = -EINVAL);
502 CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
504 sb->s_op = &lustre_super_operations;
505 #ifdef HAVE_XATTR_HANDLER_FLAGS
506 sb->s_xattr = ll_xattr_handlers;
508 #if THREAD_SIZE >= 8192 /*b=17630*/
509 sb->s_export_op = &lustre_export_operations;
513 * XXX: move this to after cbd setup? */
514 valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMODEASIZE;
515 if (sbi->ll_flags & LL_SBI_ACL)
516 valid |= OBD_MD_FLACL;
518 OBD_ALLOC_PTR(op_data);
520 GOTO(out_lock_cn_cb, err = -ENOMEM);
522 op_data->op_fid1 = sbi->ll_root_fid;
523 op_data->op_mode = 0;
524 op_data->op_valid = valid;
526 err = md_getattr(sbi->ll_md_exp, op_data, &request);
528 OBD_FREE_PTR(op_data);
530 CERROR("%s: md_getattr failed for root: rc = %d\n",
531 sbi->ll_md_exp->exp_obd->obd_name, err);
532 GOTO(out_lock_cn_cb, err);
535 err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
536 sbi->ll_md_exp, &lmd);
538 CERROR("failed to understand root inode md: rc = %d\n", err);
539 ptlrpc_req_finished(request);
540 GOTO(out_lock_cn_cb, err);
543 LASSERT(fid_is_sane(&sbi->ll_root_fid));
544 root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
545 sbi->ll_flags & LL_SBI_32BIT_API),
547 md_free_lustre_md(sbi->ll_md_exp, &lmd);
548 ptlrpc_req_finished(request);
551 #ifdef CONFIG_FS_POSIX_ACL
553 posix_acl_release(lmd.posix_acl);
554 lmd.posix_acl = NULL;
557 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
559 CERROR("lustre_lite: bad iget4 for root\n");
563 checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
564 err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
565 KEY_CHECKSUM, sizeof(checksum), &checksum,
568 CERROR("%s: Set checksum failed: rc = %d\n",
569 sbi->ll_dt_exp->exp_obd->obd_name, err);
574 err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CACHE_SET),
575 KEY_CACHE_SET, sizeof(*sbi->ll_cache),
576 sbi->ll_cache, NULL);
578 CERROR("%s: Set cache_set failed: rc = %d\n",
579 sbi->ll_dt_exp->exp_obd->obd_name, err);
583 sb->s_root = d_make_root(root);
584 if (sb->s_root == NULL) {
585 CERROR("%s: can't make root dentry\n",
586 ll_get_fsname(sb, NULL, 0));
587 GOTO(out_root, err = -ENOMEM);
589 #ifdef HAVE_DCACHE_LOCK
590 sb->s_root->d_op = &ll_d_ops;
593 sbi->ll_sdev_orig = sb->s_dev;
595 /* We set sb->s_dev equal on all lustre clients in order to support
596 * NFS export clustering. NFSD requires that the FSID be the same
598 /* s_dev is also used in lt_compare() to compare two fs, but that is
599 * only a node-local comparison. */
600 uuid = obd_get_uuid(sbi->ll_md_exp);
602 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
609 if (sbi->ll_proc_root != NULL) {
610 err = lprocfs_ll_register_obd(sb, dt);
612 CERROR("%s: could not register %s in llite: rc = %d\n",
613 dt, ll_get_fsname(sb, NULL, 0), err);
616 err = lprocfs_ll_register_obd(sb, md);
618 CERROR("%s: could not register %s in llite: rc = %d\n",
619 md, ll_get_fsname(sb, NULL, 0), err);
629 obd_fid_fini(sbi->ll_dt_exp->exp_obd);
631 obd_disconnect(sbi->ll_dt_exp);
632 sbi->ll_dt_exp = NULL;
634 obd_fid_fini(sbi->ll_md_exp->exp_obd);
636 obd_disconnect(sbi->ll_md_exp);
637 sbi->ll_md_exp = NULL;
646 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
650 size = sizeof(*lmmsize);
651 rc = obd_get_info(NULL, sbi->ll_dt_exp, sizeof(KEY_MAX_EASIZE),
652 KEY_MAX_EASIZE, &size, lmmsize);
654 CERROR("%s: cannot get max LOV EA size: rc = %d\n",
655 sbi->ll_dt_exp->exp_obd->obd_name, rc);
660 rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
661 KEY_MAX_EASIZE, &size, lmmsize);
663 CERROR("Get max mdsize error rc %d\n", rc);
669 * Get the value of the default_easize parameter.
671 * \see client_obd::cl_default_mds_easize
673 * \param[in] sbi superblock info for this filesystem
674 * \param[out] lmmsize pointer to storage location for value
676 * \retval 0 on success
677 * \retval negative negated errno on failure
679 int ll_get_default_mdsize(struct ll_sb_info *sbi, int *lmmsize)
684 rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_DEFAULT_EASIZE),
685 KEY_DEFAULT_EASIZE, &size, lmmsize);
687 CERROR("Get default mdsize error rc %d\n", rc);
693 * Set the default_easize parameter to the given value.
695 * \see client_obd::cl_default_mds_easize
697 * \param[in] sbi superblock info for this filesystem
698 * \param[in] lmmsize the size to set
700 * \retval 0 on success
701 * \retval negative negated errno on failure
703 int ll_set_default_mdsize(struct ll_sb_info *sbi, int lmmsize)
707 if (lmmsize < sizeof(struct lov_mds_md) ||
708 lmmsize > OBD_MAX_DEFAULT_EA_SIZE)
711 rc = obd_set_info_async(NULL, sbi->ll_md_exp,
712 sizeof(KEY_DEFAULT_EASIZE), KEY_DEFAULT_EASIZE,
713 sizeof(int), &lmmsize, NULL);
718 static void client_common_put_super(struct super_block *sb)
720 struct ll_sb_info *sbi = ll_s2sbi(sb);
725 obd_fid_fini(sbi->ll_dt_exp->exp_obd);
726 obd_disconnect(sbi->ll_dt_exp);
727 sbi->ll_dt_exp = NULL;
729 lprocfs_ll_unregister_mountpoint(sbi);
731 obd_fid_fini(sbi->ll_md_exp->exp_obd);
732 obd_disconnect(sbi->ll_md_exp);
733 sbi->ll_md_exp = NULL;
738 void ll_kill_super(struct super_block *sb)
740 struct ll_sb_info *sbi;
744 if (!(sb->s_flags & MS_ACTIVE))
748 /* we need restore s_dev from changed for clustred NFS before put_super
749 * because new kernels have cached s_dev and change sb->s_dev in
750 * put_super not affected real removing devices */
752 sb->s_dev = sbi->ll_sdev_orig;
753 sbi->ll_umounting = 1;
755 /* wait running statahead threads to quit */
756 while (atomic_read(&sbi->ll_sa_running) > 0) {
757 set_current_state(TASK_UNINTERRUPTIBLE);
758 schedule_timeout(msecs_to_jiffies(MSEC_PER_SEC >> 3));
765 static inline int ll_set_opt(const char *opt, char *data, int fl)
767 if (strncmp(opt, data, strlen(opt)) != 0)
773 /* non-client-specific mount options are parsed in lmd_parse */
774 static int ll_options(char *options, int *flags)
777 char *s1 = options, *s2;
783 CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
786 CDEBUG(D_SUPER, "next opt=%s\n", s1);
787 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
792 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
797 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
802 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
807 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
812 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
817 tmp = ll_set_opt("context", s1, 1);
820 tmp = ll_set_opt("fscontext", s1, 1);
823 tmp = ll_set_opt("defcontext", s1, 1);
826 tmp = ll_set_opt("rootcontext", s1, 1);
829 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
834 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
840 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
845 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
850 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
855 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
860 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
865 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
870 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
875 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
880 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
885 tmp = ll_set_opt("always_ping", s1, LL_SBI_ALWAYS_PING);
890 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
896 s2 = strchr(s1, ',');
904 void ll_lli_init(struct ll_inode_info *lli)
906 lli->lli_inode_magic = LLI_INODE_MAGIC;
908 spin_lock_init(&lli->lli_lock);
909 lli->lli_posix_acl = NULL;
910 /* Do not set lli_fid, it has been initialized already. */
911 fid_zero(&lli->lli_pfid);
912 lli->lli_mds_read_och = NULL;
913 lli->lli_mds_write_och = NULL;
914 lli->lli_mds_exec_och = NULL;
915 lli->lli_open_fd_read_count = 0;
916 lli->lli_open_fd_write_count = 0;
917 lli->lli_open_fd_exec_count = 0;
918 mutex_init(&lli->lli_och_mutex);
919 spin_lock_init(&lli->lli_agl_lock);
920 spin_lock_init(&lli->lli_layout_lock);
921 ll_layout_version_set(lli, CL_LAYOUT_GEN_NONE);
922 lli->lli_clob = NULL;
924 init_rwsem(&lli->lli_xattrs_list_rwsem);
925 mutex_init(&lli->lli_xattrs_enq_lock);
927 LASSERT(lli->lli_vfs_inode.i_mode != 0);
928 if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
929 mutex_init(&lli->lli_readdir_mutex);
930 lli->lli_opendir_key = NULL;
932 spin_lock_init(&lli->lli_sa_lock);
933 lli->lli_opendir_pid = 0;
934 lli->lli_sa_enabled = 0;
935 lli->lli_def_stripe_offset = -1;
937 mutex_init(&lli->lli_size_mutex);
938 lli->lli_symlink_name = NULL;
939 init_rwsem(&lli->lli_trunc_sem);
940 range_lock_tree_init(&lli->lli_write_tree);
941 init_rwsem(&lli->lli_glimpse_sem);
942 lli->lli_glimpse_time = 0;
943 INIT_LIST_HEAD(&lli->lli_agl_list);
944 lli->lli_agl_index = 0;
945 lli->lli_async_rc = 0;
947 mutex_init(&lli->lli_layout_mutex);
948 memset(lli->lli_jobid, 0, LUSTRE_JOBID_SIZE);
951 static inline int ll_bdi_register(struct backing_dev_info *bdi)
953 static atomic_t ll_bdi_num = ATOMIC_INIT(0);
955 bdi->name = "lustre";
956 return bdi_register(bdi, NULL, "lustre-%d",
957 atomic_inc_return(&ll_bdi_num));
960 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
962 struct lustre_profile *lprof = NULL;
963 struct lustre_sb_info *lsi = s2lsi(sb);
964 struct ll_sb_info *sbi;
965 char *dt = NULL, *md = NULL;
966 char *profilenm = get_profile_name(sb);
967 struct config_llog_instance *cfg;
968 /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
969 const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
975 CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
981 try_module_get(THIS_MODULE);
983 /* client additional sb info */
984 lsi->lsi_llsbi = sbi = ll_init_sbi();
986 module_put(THIS_MODULE);
991 err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
995 err = bdi_init(&lsi->lsi_bdi);
998 lsi->lsi_flags |= LSI_BDI_INITIALIZED;
999 #ifdef HAVE_BDI_CAP_MAP_COPY
1000 lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
1002 lsi->lsi_bdi.capabilities = 0;
1004 err = ll_bdi_register(&lsi->lsi_bdi);
1006 GOTO(out_free, err);
1008 sb->s_bdi = &lsi->lsi_bdi;
1009 #ifndef HAVE_DCACHE_LOCK
1010 /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
1011 sb->s_d_op = &ll_d_ops;
1014 /* Call lprocfs_ll_register_mountpoint() before lustre_process_log()
1015 * so that "llite.*.*" params can be processed correctly. */
1016 if (proc_lustre_fs_root != NULL) {
1017 err = lprocfs_ll_register_mountpoint(proc_lustre_fs_root, sb);
1019 CERROR("%s: could not register mountpoint in llite: "
1020 "rc = %d\n", ll_get_fsname(sb, NULL, 0), err);
1025 /* Generate a string unique to this super, in case some joker tries
1026 to mount the same fs at two mount points.
1027 Use the address of the super itself.*/
1028 cfg->cfg_instance = sb;
1029 cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
1030 cfg->cfg_callback = class_config_llog_handler;
1031 cfg->cfg_sub_clds = CONFIG_SUB_CLIENT;
1032 /* set up client obds */
1033 err = lustre_process_log(sb, profilenm, cfg);
1035 GOTO(out_proc, err);
1037 /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1038 lprof = class_get_profile(profilenm);
1039 if (lprof == NULL) {
1040 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1041 " read from the MGS. Does that filesystem "
1042 "exist?\n", profilenm);
1043 GOTO(out_proc, err = -EINVAL);
1045 CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1046 lprof->lp_md, lprof->lp_dt);
1048 dt_len = strlen(lprof->lp_dt) + instlen + 2;
1049 OBD_ALLOC(dt, dt_len);
1051 GOTO(out_proc, err = -ENOMEM);
1052 snprintf(dt, dt_len - 1, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
1054 md_len = strlen(lprof->lp_md) + instlen + 2;
1055 OBD_ALLOC(md, md_len);
1057 GOTO(out_proc, err = -ENOMEM);
1058 snprintf(md, md_len - 1, "%s-%p", lprof->lp_md, cfg->cfg_instance);
1060 /* connections, registrations, sb setup */
1061 err = client_common_fill_super(sb, md, dt, mnt);
1063 GOTO(out_proc, err);
1065 sbi->ll_client_common_fill_super_succeeded = 1;
1069 lprocfs_ll_unregister_mountpoint(sbi);
1072 OBD_FREE(md, md_len);
1074 OBD_FREE(dt, dt_len);
1076 class_put_profile(lprof);
1079 else if (sbi->ll_flags & LL_SBI_VERBOSE)
1080 LCONSOLE_WARN("Mounted %s\n", profilenm);
1084 } /* ll_fill_super */
1086 void ll_put_super(struct super_block *sb)
1088 struct config_llog_instance cfg, params_cfg;
1089 struct obd_device *obd;
1090 struct lustre_sb_info *lsi = s2lsi(sb);
1091 struct ll_sb_info *sbi = ll_s2sbi(sb);
1092 char *profilenm = get_profile_name(sb);
1094 int next, force = 1, rc = 0;
1097 CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1099 cfg.cfg_instance = sb;
1100 lustre_end_log(sb, profilenm, &cfg);
1102 params_cfg.cfg_instance = sb;
1103 lustre_end_log(sb, PARAMS_FILENAME, ¶ms_cfg);
1105 if (sbi->ll_md_exp) {
1106 obd = class_exp2obd(sbi->ll_md_exp);
1108 force = obd->obd_force;
1111 /* Wait for unstable pages to be committed to stable storage */
1113 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
1114 rc = l_wait_event(sbi->ll_cache->ccc_unstable_waitq,
1115 atomic_long_read(&sbi->ll_cache->ccc_unstable_nr) == 0,
1119 ccc_count = atomic_long_read(&sbi->ll_cache->ccc_unstable_nr);
1120 if (force == 0 && rc != -EINTR)
1121 LASSERTF(ccc_count == 0, "count: %li\n", ccc_count);
1124 /* We need to set force before the lov_disconnect in
1125 lustre_common_put_super, since l_d cleans up osc's as well. */
1128 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1130 obd->obd_force = force;
1134 if (sbi->ll_client_common_fill_super_succeeded) {
1135 /* Only if client_common_fill_super succeeded */
1136 client_common_put_super(sb);
1140 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1141 class_manual_cleanup(obd);
1144 if (sbi->ll_flags & LL_SBI_VERBOSE)
1145 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1148 class_del_profile(profilenm);
1150 if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1151 bdi_destroy(&lsi->lsi_bdi);
1152 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1156 lsi->lsi_llsbi = NULL;
1158 lustre_common_put_super(sb);
1160 cl_env_cache_purge(~0);
1162 module_put(THIS_MODULE);
1165 } /* client_put_super */
1167 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1169 struct inode *inode = NULL;
1171 /* NOTE: we depend on atomic igrab() -bzzz */
1172 lock_res_and_lock(lock);
1173 if (lock->l_resource->lr_lvb_inode) {
1174 struct ll_inode_info * lli;
1175 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1176 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1177 inode = igrab(lock->l_resource->lr_lvb_inode);
1179 inode = lock->l_resource->lr_lvb_inode;
1180 LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ? D_INFO :
1181 D_WARNING, lock, "lr_lvb_inode %p is "
1182 "bogus: magic %08x",
1183 lock->l_resource->lr_lvb_inode,
1184 lli->lli_inode_magic);
1188 unlock_res_and_lock(lock);
1192 void ll_dir_clear_lsm_md(struct inode *inode)
1194 struct ll_inode_info *lli = ll_i2info(inode);
1196 LASSERT(S_ISDIR(inode->i_mode));
1198 if (lli->lli_lsm_md != NULL) {
1199 lmv_free_memmd(lli->lli_lsm_md);
1200 lli->lli_lsm_md = NULL;
1204 static struct inode *ll_iget_anon_dir(struct super_block *sb,
1205 const struct lu_fid *fid,
1206 struct lustre_md *md)
1208 struct ll_sb_info *sbi = ll_s2sbi(sb);
1209 struct mdt_body *body = md->body;
1210 struct inode *inode;
1214 ino = cl_fid_build_ino(fid, sbi->ll_flags & LL_SBI_32BIT_API);
1215 inode = iget_locked(sb, ino);
1216 if (inode == NULL) {
1217 CERROR("%s: failed get simple inode "DFID": rc = -ENOENT\n",
1218 ll_get_fsname(sb, NULL, 0), PFID(fid));
1219 RETURN(ERR_PTR(-ENOENT));
1222 if (inode->i_state & I_NEW) {
1223 struct ll_inode_info *lli = ll_i2info(inode);
1224 struct lmv_stripe_md *lsm = md->lmv;
1226 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1227 (body->mbo_mode & S_IFMT);
1228 LASSERTF(S_ISDIR(inode->i_mode), "Not slave inode "DFID"\n",
1231 LTIME_S(inode->i_mtime) = 0;
1232 LTIME_S(inode->i_atime) = 0;
1233 LTIME_S(inode->i_ctime) = 0;
1236 #ifdef HAVE_BACKING_DEV_INFO
1237 /* initializing backing dev info. */
1238 inode->i_mapping->backing_dev_info =
1239 &s2lsi(inode->i_sb)->lsi_bdi;
1241 inode->i_op = &ll_dir_inode_operations;
1242 inode->i_fop = &ll_dir_operations;
1243 lli->lli_fid = *fid;
1246 LASSERT(lsm != NULL);
1247 /* master object FID */
1248 lli->lli_pfid = body->mbo_fid1;
1249 CDEBUG(D_INODE, "lli %p slave "DFID" master "DFID"\n",
1250 lli, PFID(fid), PFID(&lli->lli_pfid));
1251 unlock_new_inode(inode);
1257 static int ll_init_lsm_md(struct inode *inode, struct lustre_md *md)
1260 struct lmv_stripe_md *lsm = md->lmv;
1263 LASSERT(lsm != NULL);
1264 /* XXX sigh, this lsm_root initialization should be in
1265 * LMV layer, but it needs ll_iget right now, so we
1266 * put this here right now. */
1267 for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
1268 fid = &lsm->lsm_md_oinfo[i].lmo_fid;
1269 LASSERT(lsm->lsm_md_oinfo[i].lmo_root == NULL);
1270 /* Unfortunately ll_iget will call ll_update_inode,
1271 * where the initialization of slave inode is slightly
1272 * different, so it reset lsm_md to NULL to avoid
1273 * initializing lsm for slave inode. */
1274 /* For migrating inode, master stripe and master object will
1275 * be same, so we only need assign this inode */
1276 if (lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION && i == 0)
1277 lsm->lsm_md_oinfo[i].lmo_root = inode;
1279 lsm->lsm_md_oinfo[i].lmo_root =
1280 ll_iget_anon_dir(inode->i_sb, fid, md);
1282 if (IS_ERR(lsm->lsm_md_oinfo[i].lmo_root)) {
1283 int rc = PTR_ERR(lsm->lsm_md_oinfo[i].lmo_root);
1285 lsm->lsm_md_oinfo[i].lmo_root = NULL;
1293 static inline int lli_lsm_md_eq(const struct lmv_stripe_md *lsm_md1,
1294 const struct lmv_stripe_md *lsm_md2)
1296 return lsm_md1->lsm_md_magic == lsm_md2->lsm_md_magic &&
1297 lsm_md1->lsm_md_stripe_count == lsm_md2->lsm_md_stripe_count &&
1298 lsm_md1->lsm_md_master_mdt_index ==
1299 lsm_md2->lsm_md_master_mdt_index &&
1300 lsm_md1->lsm_md_hash_type == lsm_md2->lsm_md_hash_type &&
1301 lsm_md1->lsm_md_layout_version ==
1302 lsm_md2->lsm_md_layout_version &&
1303 strcmp(lsm_md1->lsm_md_pool_name,
1304 lsm_md2->lsm_md_pool_name) == 0;
1307 static int ll_update_lsm_md(struct inode *inode, struct lustre_md *md)
1309 struct ll_inode_info *lli = ll_i2info(inode);
1310 struct lmv_stripe_md *lsm = md->lmv;
1314 LASSERT(S_ISDIR(inode->i_mode));
1315 CDEBUG(D_INODE, "update lsm %p of "DFID"\n", lli->lli_lsm_md,
1316 PFID(ll_inode2fid(inode)));
1318 /* no striped information from request. */
1320 if (lli->lli_lsm_md == NULL) {
1322 } else if (lli->lli_lsm_md->lsm_md_hash_type &
1323 LMV_HASH_FLAG_MIGRATION) {
1324 /* migration is done, the temporay MIGRATE layout has
1326 CDEBUG(D_INODE, DFID" finish migration.\n",
1327 PFID(ll_inode2fid(inode)));
1328 lmv_free_memmd(lli->lli_lsm_md);
1329 lli->lli_lsm_md = NULL;
1332 /* The lustre_md from req does not include stripeEA,
1333 * see ll_md_setattr */
1338 /* set the directory layout */
1339 if (lli->lli_lsm_md == NULL) {
1340 struct cl_attr *attr;
1342 rc = ll_init_lsm_md(inode, md);
1346 /* set md->lmv to NULL, so the following free lustre_md
1347 * will not free this lsm */
1349 lli->lli_lsm_md = lsm;
1351 OBD_ALLOC_PTR(attr);
1355 /* validate the lsm */
1356 rc = md_merge_attr(ll_i2mdexp(inode), lsm, attr,
1357 ll_md_blocking_ast);
1363 if (md->body->mbo_valid & OBD_MD_FLNLINK)
1364 md->body->mbo_nlink = attr->cat_nlink;
1365 if (md->body->mbo_valid & OBD_MD_FLSIZE)
1366 md->body->mbo_size = attr->cat_size;
1367 if (md->body->mbo_valid & OBD_MD_FLATIME)
1368 md->body->mbo_atime = attr->cat_atime;
1369 if (md->body->mbo_valid & OBD_MD_FLCTIME)
1370 md->body->mbo_ctime = attr->cat_ctime;
1371 if (md->body->mbo_valid & OBD_MD_FLMTIME)
1372 md->body->mbo_mtime = attr->cat_mtime;
1376 CDEBUG(D_INODE, "Set lsm %p magic %x to "DFID"\n", lsm,
1377 lsm->lsm_md_magic, PFID(ll_inode2fid(inode)));
1381 /* Compare the old and new stripe information */
1382 if (!lsm_md_eq(lli->lli_lsm_md, lsm)) {
1383 struct lmv_stripe_md *old_lsm = lli->lli_lsm_md;
1386 CERROR("%s: inode "DFID"(%p)'s lmv layout mismatch (%p)/(%p)"
1387 "magic:0x%x/0x%x stripe count: %d/%d master_mdt: %d/%d"
1388 "hash_type:0x%x/0x%x layout: 0x%x/0x%x pool:%s/%s\n",
1389 ll_get_fsname(inode->i_sb, NULL, 0), PFID(&lli->lli_fid),
1390 inode, lsm, old_lsm,
1391 lsm->lsm_md_magic, old_lsm->lsm_md_magic,
1392 lsm->lsm_md_stripe_count,
1393 old_lsm->lsm_md_stripe_count,
1394 lsm->lsm_md_master_mdt_index,
1395 old_lsm->lsm_md_master_mdt_index,
1396 lsm->lsm_md_hash_type, old_lsm->lsm_md_hash_type,
1397 lsm->lsm_md_layout_version,
1398 old_lsm->lsm_md_layout_version,
1399 lsm->lsm_md_pool_name,
1400 old_lsm->lsm_md_pool_name);
1402 for (idx = 0; idx < old_lsm->lsm_md_stripe_count; idx++) {
1403 CERROR("%s: sub FIDs in old lsm idx %d, old: "DFID"\n",
1404 ll_get_fsname(inode->i_sb, NULL, 0), idx,
1405 PFID(&old_lsm->lsm_md_oinfo[idx].lmo_fid));
1408 for (idx = 0; idx < lsm->lsm_md_stripe_count; idx++) {
1409 CERROR("%s: sub FIDs in new lsm idx %d, new: "DFID"\n",
1410 ll_get_fsname(inode->i_sb, NULL, 0), idx,
1411 PFID(&lsm->lsm_md_oinfo[idx].lmo_fid));
1420 void ll_clear_inode(struct inode *inode)
1422 struct ll_inode_info *lli = ll_i2info(inode);
1423 struct ll_sb_info *sbi = ll_i2sbi(inode);
1426 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1427 PFID(ll_inode2fid(inode)), inode);
1429 if (S_ISDIR(inode->i_mode)) {
1430 /* these should have been cleared in ll_file_release */
1431 LASSERT(lli->lli_opendir_key == NULL);
1432 LASSERT(lli->lli_sai == NULL);
1433 LASSERT(lli->lli_opendir_pid == 0);
1436 md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1438 LASSERT(!lli->lli_open_fd_write_count);
1439 LASSERT(!lli->lli_open_fd_read_count);
1440 LASSERT(!lli->lli_open_fd_exec_count);
1442 if (lli->lli_mds_write_och)
1443 ll_md_real_close(inode, FMODE_WRITE);
1444 if (lli->lli_mds_exec_och)
1445 ll_md_real_close(inode, FMODE_EXEC);
1446 if (lli->lli_mds_read_och)
1447 ll_md_real_close(inode, FMODE_READ);
1449 if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1450 OBD_FREE(lli->lli_symlink_name,
1451 strlen(lli->lli_symlink_name) + 1);
1452 lli->lli_symlink_name = NULL;
1455 ll_xattr_cache_destroy(inode);
1457 #ifdef CONFIG_FS_POSIX_ACL
1458 forget_all_cached_acls(inode);
1459 if (lli->lli_posix_acl) {
1460 LASSERT(atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1461 posix_acl_release(lli->lli_posix_acl);
1462 lli->lli_posix_acl = NULL;
1465 lli->lli_inode_magic = LLI_INODE_DEAD;
1467 if (S_ISDIR(inode->i_mode))
1468 ll_dir_clear_lsm_md(inode);
1469 else if (S_ISREG(inode->i_mode) && !is_bad_inode(inode))
1470 LASSERT(list_empty(&lli->lli_agl_list));
1473 * XXX This has to be done before lsm is freed below, because
1474 * cl_object still uses inode lsm.
1476 cl_inode_fini(inode);
1481 static int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data)
1483 struct lustre_md md;
1484 struct inode *inode = dentry->d_inode;
1485 struct ll_sb_info *sbi = ll_i2sbi(inode);
1486 struct ptlrpc_request *request = NULL;
1490 op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1491 LUSTRE_OPC_ANY, NULL);
1492 if (IS_ERR(op_data))
1493 RETURN(PTR_ERR(op_data));
1495 rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &request);
1497 ptlrpc_req_finished(request);
1498 if (rc == -ENOENT) {
1500 /* Unlinked special device node? Or just a race?
1501 * Pretend we done everything. */
1502 if (!S_ISREG(inode->i_mode) &&
1503 !S_ISDIR(inode->i_mode)) {
1504 ia_valid = op_data->op_attr.ia_valid;
1505 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1506 rc = simple_setattr(dentry, &op_data->op_attr);
1507 op_data->op_attr.ia_valid = ia_valid;
1509 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1510 CERROR("md_setattr fails: rc = %d\n", rc);
1515 rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1516 sbi->ll_md_exp, &md);
1518 ptlrpc_req_finished(request);
1522 ia_valid = op_data->op_attr.ia_valid;
1523 /* inode size will be in ll_setattr_ost, can't do it now since dirty
1524 * cache is not cleared yet. */
1525 op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1526 if (S_ISREG(inode->i_mode))
1528 rc = simple_setattr(dentry, &op_data->op_attr);
1529 if (S_ISREG(inode->i_mode))
1530 inode_unlock(inode);
1531 op_data->op_attr.ia_valid = ia_valid;
1533 rc = ll_update_inode(inode, &md);
1534 ptlrpc_req_finished(request);
1539 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1540 * object(s) determine the file size and mtime. Otherwise, the MDS will
1541 * keep these values until such a time that objects are allocated for it.
1542 * We do the MDS operations first, as it is checking permissions for us.
1543 * We don't to the MDS RPC if there is nothing that we want to store there,
1544 * otherwise there is no harm in updating mtime/atime on the MDS if we are
1545 * going to do an RPC anyways.
1547 * If we are doing a truncate, we will send the mtime and ctime updates
1548 * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1549 * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1552 * In case of HSMimport, we only set attr on MDS.
1554 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr, bool hsm_import)
1556 struct inode *inode = dentry->d_inode;
1557 struct ll_inode_info *lli = ll_i2info(inode);
1558 struct md_op_data *op_data = NULL;
1562 CDEBUG(D_VFSTRACE, "%s: setattr inode "DFID"(%p) from %llu to %llu, "
1563 "valid %x, hsm_import %d\n",
1564 ll_get_fsname(inode->i_sb, NULL, 0), PFID(&lli->lli_fid),
1565 inode, i_size_read(inode), attr->ia_size, attr->ia_valid,
1568 if (attr->ia_valid & ATTR_SIZE) {
1569 /* Check new size against VFS/VM file size limit and rlimit */
1570 rc = inode_newsize_ok(inode, attr->ia_size);
1574 /* The maximum Lustre file size is variable, based on the
1575 * OST maximum object size and number of stripes. This
1576 * needs another check in addition to the VFS check above. */
1577 if (attr->ia_size > ll_file_maxbytes(inode)) {
1578 CDEBUG(D_INODE,"file "DFID" too large %llu > %llu\n",
1579 PFID(&lli->lli_fid), attr->ia_size,
1580 ll_file_maxbytes(inode));
1584 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1587 /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1588 if (attr->ia_valid & TIMES_SET_FLAGS) {
1589 if ((!uid_eq(current_fsuid(), inode->i_uid)) &&
1590 !cfs_capable(CFS_CAP_FOWNER))
1594 /* We mark all of the fields "set" so MDS/OST does not re-set them */
1595 if (!(attr->ia_valid & ATTR_CTIME_SET) &&
1596 (attr->ia_valid & ATTR_CTIME)) {
1597 attr->ia_ctime = current_time(inode);
1598 attr->ia_valid |= ATTR_CTIME_SET;
1600 if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1601 (attr->ia_valid & ATTR_ATIME)) {
1602 attr->ia_atime = current_time(inode);
1603 attr->ia_valid |= ATTR_ATIME_SET;
1605 if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1606 (attr->ia_valid & ATTR_MTIME)) {
1607 attr->ia_mtime = current_time(inode);
1608 attr->ia_valid |= ATTR_MTIME_SET;
1611 if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1612 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %llu\n",
1613 LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1614 (s64)ktime_get_real_seconds());
1616 if (S_ISREG(inode->i_mode)) {
1617 if (attr->ia_valid & ATTR_SIZE)
1618 inode_dio_write_done(inode);
1619 inode_unlock(inode);
1622 /* We always do an MDS RPC, even if we're only changing the size;
1623 * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1625 OBD_ALLOC_PTR(op_data);
1626 if (op_data == NULL)
1627 GOTO(out, rc = -ENOMEM);
1629 if (!hsm_import && attr->ia_valid & ATTR_SIZE) {
1630 /* If we are changing file size, file content is
1631 * modified, flag it. */
1632 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1633 op_data->op_bias |= MDS_DATA_MODIFIED;
1634 ll_file_clear_flag(lli, LLIF_DATA_MODIFIED);
1637 op_data->op_attr = *attr;
1639 rc = ll_md_setattr(dentry, op_data);
1643 if (!S_ISREG(inode->i_mode) || hsm_import)
1646 if (attr->ia_valid & (ATTR_SIZE |
1647 ATTR_ATIME | ATTR_ATIME_SET |
1648 ATTR_MTIME | ATTR_MTIME_SET |
1649 ATTR_CTIME | ATTR_CTIME_SET)) {
1650 /* For truncate and utimes sending attributes to OSTs, setting
1651 * mtime/atime to the past will be performed under PW [0:EOF]
1652 * extent lock (new_size:EOF for truncate). It may seem
1653 * excessive to send mtime/atime updates to OSTs when not
1654 * setting times to past, but it is necessary due to possible
1655 * time de-synchronization between MDT inode and OST objects */
1656 rc = cl_setattr_ost(lli->lli_clob, attr, 0);
1659 /* If the file was restored, it needs to set dirty flag.
1661 * We've already sent MDS_DATA_MODIFIED flag in
1662 * ll_md_setattr() for truncate. However, the MDT refuses to
1663 * set the HS_DIRTY flag on released files, so we have to set
1664 * it again if the file has been restored. Please check how
1665 * LLIF_DATA_MODIFIED is set in vvp_io_setattr_fini().
1667 * Please notice that if the file is not released, the previous
1668 * MDS_DATA_MODIFIED has taken effect and usually
1669 * LLIF_DATA_MODIFIED is not set(see vvp_io_setattr_fini()).
1670 * This way we can save an RPC for common open + trunc
1672 if (ll_file_test_and_clear_flag(lli, LLIF_DATA_MODIFIED)) {
1673 struct hsm_state_set hss = {
1674 .hss_valid = HSS_SETMASK,
1675 .hss_setmask = HS_DIRTY,
1679 rc2 = ll_hsm_state_set(inode, &hss);
1680 /* truncate and write can happen at the same time, so that
1681 * the file can be set modified even though the file is not
1682 * restored from released state, and ll_hsm_state_set() is
1683 * not applicable for the file, and rc2 < 0 is normal in this
1686 CDEBUG(D_INFO, DFID "HSM set dirty failed: rc2 = %d\n",
1687 PFID(ll_inode2fid(inode)), rc2);
1692 if (op_data != NULL)
1693 ll_finish_md_op_data(op_data);
1695 if (S_ISREG(inode->i_mode)) {
1697 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1698 inode_dio_wait(inode);
1699 /* Once we've got the i_mutex, it's safe to set the S_NOSEC
1700 * flag. ll_update_inode (called from ll_md_setattr), clears
1701 * inode flags, so there is a gap where S_NOSEC is not set.
1702 * This can cause a writer to take the i_mutex unnecessarily,
1703 * but this is safe to do and should be rare. */
1704 inode_has_no_xattr(inode);
1707 ll_stats_ops_tally(ll_i2sbi(inode), (attr->ia_valid & ATTR_SIZE) ?
1708 LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1713 int ll_setattr(struct dentry *de, struct iattr *attr)
1715 int mode = de->d_inode->i_mode;
1717 if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1718 (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1719 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1721 if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1722 (ATTR_SIZE|ATTR_MODE)) &&
1723 (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1724 (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1725 !(attr->ia_mode & S_ISGID))))
1726 attr->ia_valid |= ATTR_FORCE;
1728 if ((attr->ia_valid & ATTR_MODE) &&
1730 !(attr->ia_mode & S_ISUID) &&
1731 !(attr->ia_valid & ATTR_KILL_SUID))
1732 attr->ia_valid |= ATTR_KILL_SUID;
1734 if ((attr->ia_valid & ATTR_MODE) &&
1735 ((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1736 !(attr->ia_mode & S_ISGID) &&
1737 !(attr->ia_valid & ATTR_KILL_SGID))
1738 attr->ia_valid |= ATTR_KILL_SGID;
1740 /* avoid polluted from ATTR_TIMES_SET,
1741 * projid is not expected to be set here */
1742 attr->ia_valid &= ~MDS_ATTR_PROJID;
1744 return ll_setattr_raw(de, attr, false);
1747 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1748 __u64 max_age, __u32 flags)
1750 struct ll_sb_info *sbi = ll_s2sbi(sb);
1751 struct obd_statfs obd_osfs;
1755 rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1757 CERROR("md_statfs fails: rc = %d\n", rc);
1761 osfs->os_type = sb->s_magic;
1763 CDEBUG(D_SUPER, "MDC blocks %llu/%llu objects %llu/%llu\n",
1764 osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,osfs->os_files);
1766 if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1767 flags |= OBD_STATFS_NODELAY;
1769 rc = obd_statfs_rqset(sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1771 CERROR("obd_statfs fails: rc = %d\n", rc);
1775 CDEBUG(D_SUPER, "OSC blocks %llu/%llu objects %llu/%llu\n",
1776 obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1779 osfs->os_bsize = obd_osfs.os_bsize;
1780 osfs->os_blocks = obd_osfs.os_blocks;
1781 osfs->os_bfree = obd_osfs.os_bfree;
1782 osfs->os_bavail = obd_osfs.os_bavail;
1784 /* If we don't have as many objects free on the OST as inodes
1785 * on the MDS, we reduce the total number of inodes to
1786 * compensate, so that the "inodes in use" number is correct.
1788 if (obd_osfs.os_ffree < osfs->os_ffree) {
1789 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1791 osfs->os_ffree = obd_osfs.os_ffree;
1796 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1798 struct super_block *sb = de->d_sb;
1799 struct obd_statfs osfs;
1800 __u64 fsid = huge_encode_dev(sb->s_dev);
1803 CDEBUG(D_VFSTRACE, "VFS Op: at %llu jiffies\n", get_jiffies_64());
1804 ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1806 /* Some amount of caching on the client is allowed */
1807 rc = ll_statfs_internal(sb, &osfs,
1808 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1813 statfs_unpack(sfs, &osfs);
1815 /* We need to downshift for all 32-bit kernels, because we can't
1816 * tell if the kernel is being called via sys_statfs64() or not.
1817 * Stop before overflowing f_bsize - in which case it is better
1818 * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1819 if (sizeof(long) < 8) {
1820 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1823 osfs.os_blocks >>= 1;
1824 osfs.os_bfree >>= 1;
1825 osfs.os_bavail >>= 1;
1829 sfs->f_blocks = osfs.os_blocks;
1830 sfs->f_bfree = osfs.os_bfree;
1831 sfs->f_bavail = osfs.os_bavail;
1832 sfs->f_fsid.val[0] = (__u32)fsid;
1833 sfs->f_fsid.val[1] = (__u32)(fsid >> 32);
1837 void ll_inode_size_lock(struct inode *inode)
1839 struct ll_inode_info *lli;
1841 LASSERT(!S_ISDIR(inode->i_mode));
1843 lli = ll_i2info(inode);
1844 mutex_lock(&lli->lli_size_mutex);
1847 void ll_inode_size_unlock(struct inode *inode)
1849 struct ll_inode_info *lli;
1851 lli = ll_i2info(inode);
1852 mutex_unlock(&lli->lli_size_mutex);
1855 int ll_update_inode(struct inode *inode, struct lustre_md *md)
1857 struct ll_inode_info *lli = ll_i2info(inode);
1858 struct mdt_body *body = md->body;
1859 struct ll_sb_info *sbi = ll_i2sbi(inode);
1862 if (body->mbo_valid & OBD_MD_FLEASIZE) {
1863 rc = cl_file_inode_init(inode, md);
1868 if (S_ISDIR(inode->i_mode)) {
1869 rc = ll_update_lsm_md(inode, md);
1874 #ifdef CONFIG_FS_POSIX_ACL
1875 if (body->mbo_valid & OBD_MD_FLACL) {
1876 spin_lock(&lli->lli_lock);
1877 if (lli->lli_posix_acl)
1878 posix_acl_release(lli->lli_posix_acl);
1879 lli->lli_posix_acl = md->posix_acl;
1880 spin_unlock(&lli->lli_lock);
1883 inode->i_ino = cl_fid_build_ino(&body->mbo_fid1,
1884 sbi->ll_flags & LL_SBI_32BIT_API);
1885 inode->i_generation = cl_fid_build_gen(&body->mbo_fid1);
1887 if (body->mbo_valid & OBD_MD_FLATIME) {
1888 if (body->mbo_atime > LTIME_S(inode->i_atime))
1889 LTIME_S(inode->i_atime) = body->mbo_atime;
1890 lli->lli_atime = body->mbo_atime;
1893 if (body->mbo_valid & OBD_MD_FLMTIME) {
1894 if (body->mbo_mtime > LTIME_S(inode->i_mtime)) {
1895 CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
1896 "to %llu\n", inode->i_ino,
1897 LTIME_S(inode->i_mtime), body->mbo_mtime);
1898 LTIME_S(inode->i_mtime) = body->mbo_mtime;
1900 lli->lli_mtime = body->mbo_mtime;
1903 if (body->mbo_valid & OBD_MD_FLCTIME) {
1904 if (body->mbo_ctime > LTIME_S(inode->i_ctime))
1905 LTIME_S(inode->i_ctime) = body->mbo_ctime;
1906 lli->lli_ctime = body->mbo_ctime;
1909 /* Clear i_flags to remove S_NOSEC before permissions are updated */
1910 if (body->mbo_valid & OBD_MD_FLFLAGS)
1911 inode->i_flags = ll_ext_to_inode_flags(body->mbo_flags);
1912 if (body->mbo_valid & OBD_MD_FLMODE)
1913 inode->i_mode = (inode->i_mode & S_IFMT) |
1914 (body->mbo_mode & ~S_IFMT);
1916 if (body->mbo_valid & OBD_MD_FLTYPE)
1917 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1918 (body->mbo_mode & S_IFMT);
1920 LASSERT(inode->i_mode != 0);
1921 if (S_ISREG(inode->i_mode))
1922 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1,
1923 LL_MAX_BLKSIZE_BITS);
1925 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1927 if (body->mbo_valid & OBD_MD_FLUID)
1928 inode->i_uid = make_kuid(&init_user_ns, body->mbo_uid);
1929 if (body->mbo_valid & OBD_MD_FLGID)
1930 inode->i_gid = make_kgid(&init_user_ns, body->mbo_gid);
1931 if (body->mbo_valid & OBD_MD_FLPROJID)
1932 lli->lli_projid = body->mbo_projid;
1933 if (body->mbo_valid & OBD_MD_FLNLINK)
1934 set_nlink(inode, body->mbo_nlink);
1935 if (body->mbo_valid & OBD_MD_FLRDEV)
1936 inode->i_rdev = old_decode_dev(body->mbo_rdev);
1938 if (body->mbo_valid & OBD_MD_FLID) {
1939 /* FID shouldn't be changed! */
1940 if (fid_is_sane(&lli->lli_fid)) {
1941 LASSERTF(lu_fid_eq(&lli->lli_fid, &body->mbo_fid1),
1942 "Trying to change FID "DFID
1943 " to the "DFID", inode "DFID"(%p)\n",
1944 PFID(&lli->lli_fid), PFID(&body->mbo_fid1),
1945 PFID(ll_inode2fid(inode)), inode);
1947 lli->lli_fid = body->mbo_fid1;
1951 LASSERT(fid_seq(&lli->lli_fid) != 0);
1953 if (body->mbo_valid & OBD_MD_FLSIZE) {
1954 i_size_write(inode, body->mbo_size);
1956 CDEBUG(D_VFSTRACE, "inode="DFID", updating i_size %llu\n",
1957 PFID(ll_inode2fid(inode)),
1958 (unsigned long long)body->mbo_size);
1960 if (body->mbo_valid & OBD_MD_FLBLOCKS)
1961 inode->i_blocks = body->mbo_blocks;
1964 if (body->mbo_valid & OBD_MD_TSTATE) {
1965 /* Set LLIF_FILE_RESTORING if restore ongoing and
1966 * clear it when done to ensure to start again
1967 * glimpsing updated attrs
1969 if (body->mbo_t_state & MS_RESTORE)
1970 ll_file_set_flag(lli, LLIF_FILE_RESTORING);
1972 ll_file_clear_flag(lli, LLIF_FILE_RESTORING);
1978 int ll_read_inode2(struct inode *inode, void *opaque)
1980 struct lustre_md *md = opaque;
1981 struct ll_inode_info *lli = ll_i2info(inode);
1985 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1986 PFID(&lli->lli_fid), inode);
1988 /* Core attributes from the MDS first. This is a new inode, and
1989 * the VFS doesn't zero times in the core inode so we have to do
1990 * it ourselves. They will be overwritten by either MDS or OST
1991 * attributes - we just need to make sure they aren't newer. */
1992 LTIME_S(inode->i_mtime) = 0;
1993 LTIME_S(inode->i_atime) = 0;
1994 LTIME_S(inode->i_ctime) = 0;
1996 rc = ll_update_inode(inode, md);
2000 /* OIDEBUG(inode); */
2002 #ifdef HAVE_BACKING_DEV_INFO
2003 /* initializing backing dev info. */
2004 inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
2006 if (S_ISREG(inode->i_mode)) {
2007 struct ll_sb_info *sbi = ll_i2sbi(inode);
2008 inode->i_op = &ll_file_inode_operations;
2009 inode->i_fop = sbi->ll_fop;
2010 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
2012 } else if (S_ISDIR(inode->i_mode)) {
2013 inode->i_op = &ll_dir_inode_operations;
2014 inode->i_fop = &ll_dir_operations;
2016 } else if (S_ISLNK(inode->i_mode)) {
2017 inode->i_op = &ll_fast_symlink_inode_operations;
2020 inode->i_op = &ll_special_inode_operations;
2022 init_special_inode(inode, inode->i_mode,
2031 void ll_delete_inode(struct inode *inode)
2033 struct ll_inode_info *lli = ll_i2info(inode);
2036 if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
2037 /* It is last chance to write out dirty pages,
2038 * otherwise we may lose data while umount */
2039 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF, CL_FSYNC_LOCAL, 1);
2041 truncate_inode_pages_final(&inode->i_data);
2043 LASSERTF(inode->i_data.nrpages == 0, "inode="DFID"(%p) nrpages=%lu, "
2044 "see https://jira.hpdd.intel.com/browse/LU-118\n",
2045 PFID(ll_inode2fid(inode)), inode, inode->i_data.nrpages);
2047 #ifdef HAVE_SBOPS_EVICT_INODE
2048 ll_clear_inode(inode);
2055 int ll_iocontrol(struct inode *inode, struct file *file,
2056 unsigned int cmd, unsigned long arg)
2058 struct ll_sb_info *sbi = ll_i2sbi(inode);
2059 struct ptlrpc_request *req = NULL;
2064 case FSFILT_IOC_GETFLAGS: {
2065 struct mdt_body *body;
2066 struct md_op_data *op_data;
2068 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
2069 0, 0, LUSTRE_OPC_ANY,
2071 if (IS_ERR(op_data))
2072 RETURN(PTR_ERR(op_data));
2074 op_data->op_valid = OBD_MD_FLFLAGS;
2075 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
2076 ll_finish_md_op_data(op_data);
2078 CERROR("%s: failure inode "DFID": rc = %d\n",
2079 sbi->ll_md_exp->exp_obd->obd_name,
2080 PFID(ll_inode2fid(inode)), rc);
2084 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
2086 flags = body->mbo_flags;
2088 ptlrpc_req_finished(req);
2090 RETURN(put_user(flags, (int __user *)arg));
2092 case FSFILT_IOC_SETFLAGS: {
2094 struct md_op_data *op_data;
2095 struct cl_object *obj;
2097 if (get_user(flags, (int __user *)arg))
2100 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
2101 LUSTRE_OPC_ANY, NULL);
2102 if (IS_ERR(op_data))
2103 RETURN(PTR_ERR(op_data));
2105 op_data->op_attr_flags = flags;
2106 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
2107 rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &req);
2108 ll_finish_md_op_data(op_data);
2109 ptlrpc_req_finished(req);
2113 inode->i_flags = ll_ext_to_inode_flags(flags);
2115 obj = ll_i2info(inode)->lli_clob;
2119 OBD_ALLOC_PTR(attr);
2123 attr->ia_valid = ATTR_ATTR_FLAG;
2124 rc = cl_setattr_ost(obj, attr, flags);
2136 int ll_flush_ctx(struct inode *inode)
2138 struct ll_sb_info *sbi = ll_i2sbi(inode);
2140 CDEBUG(D_SEC, "flush context for user %d\n",
2141 from_kuid(&init_user_ns, current_uid()));
2143 obd_set_info_async(NULL, sbi->ll_md_exp,
2144 sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2146 obd_set_info_async(NULL, sbi->ll_dt_exp,
2147 sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2152 /* umount -f client means force down, don't save state */
2153 void ll_umount_begin(struct super_block *sb)
2155 struct ll_sb_info *sbi = ll_s2sbi(sb);
2156 struct obd_device *obd;
2157 struct obd_ioctl_data *ioc_data;
2158 struct l_wait_info lwi;
2159 wait_queue_head_t waitq;
2162 CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2163 sb->s_count, atomic_read(&sb->s_active));
2165 obd = class_exp2obd(sbi->ll_md_exp);
2167 CERROR("Invalid MDC connection handle %#llx\n",
2168 sbi->ll_md_exp->exp_handle.h_cookie);
2174 obd = class_exp2obd(sbi->ll_dt_exp);
2176 CERROR("Invalid LOV connection handle %#llx\n",
2177 sbi->ll_dt_exp->exp_handle.h_cookie);
2183 OBD_ALLOC_PTR(ioc_data);
2185 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2186 sizeof *ioc_data, ioc_data, NULL);
2188 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2189 sizeof *ioc_data, ioc_data, NULL);
2191 OBD_FREE_PTR(ioc_data);
2194 /* Really, we'd like to wait until there are no requests outstanding,
2195 * and then continue. For now, we just periodically checking for vfs
2196 * to decrement mnt_cnt and hope to finish it within 10sec.
2198 init_waitqueue_head(&waitq);
2199 lwi = LWI_TIMEOUT_INTERVAL(cfs_time_seconds(10),
2200 cfs_time_seconds(1), NULL, NULL);
2201 l_wait_event(waitq, may_umount(sbi->ll_mnt.mnt), &lwi);
2206 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2208 struct ll_sb_info *sbi = ll_s2sbi(sb);
2209 char *profilenm = get_profile_name(sb);
2213 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2214 read_only = *flags & MS_RDONLY;
2215 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2216 sizeof(KEY_READ_ONLY),
2217 KEY_READ_ONLY, sizeof(read_only),
2220 LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2221 profilenm, read_only ?
2222 "read-only" : "read-write", err);
2227 sb->s_flags |= MS_RDONLY;
2229 sb->s_flags &= ~MS_RDONLY;
2231 if (sbi->ll_flags & LL_SBI_VERBOSE)
2232 LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2233 read_only ? "read-only" : "read-write");
2239 * Cleanup the open handle that is cached on MDT-side.
2241 * For open case, the client side open handling thread may hit error
2242 * after the MDT grant the open. Under such case, the client should
2243 * send close RPC to the MDT as cleanup; otherwise, the open handle
2244 * on the MDT will be leaked there until the client umount or evicted.
2246 * In further, if someone unlinked the file, because the open handle
2247 * holds the reference on such file/object, then it will block the
2248 * subsequent threads that want to locate such object via FID.
2250 * \param[in] sb super block for this file-system
2251 * \param[in] open_req pointer to the original open request
2253 void ll_open_cleanup(struct super_block *sb, struct ptlrpc_request *open_req)
2255 struct mdt_body *body;
2256 struct md_op_data *op_data;
2257 struct ptlrpc_request *close_req = NULL;
2258 struct obd_export *exp = ll_s2sbi(sb)->ll_md_exp;
2261 body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
2262 OBD_ALLOC_PTR(op_data);
2263 if (op_data == NULL) {
2264 CWARN("%s: cannot allocate op_data to release open handle for "
2266 ll_get_fsname(sb, NULL, 0), PFID(&body->mbo_fid1));
2271 op_data->op_fid1 = body->mbo_fid1;
2272 op_data->op_handle = body->mbo_handle;
2273 op_data->op_mod_time = ktime_get_real_seconds();
2274 md_close(exp, op_data, NULL, &close_req);
2275 ptlrpc_req_finished(close_req);
2276 ll_finish_md_op_data(op_data);
2281 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2282 struct super_block *sb, struct lookup_intent *it)
2284 struct ll_sb_info *sbi = NULL;
2285 struct lustre_md md = { NULL };
2289 LASSERT(*inode || sb);
2290 sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2291 rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2292 sbi->ll_md_exp, &md);
2297 rc = ll_update_inode(*inode, &md);
2301 LASSERT(sb != NULL);
2304 * At this point server returns to client's same fid as client
2305 * generated for creating. So using ->fid1 is okay here.
2307 if (!fid_is_sane(&md.body->mbo_fid1)) {
2308 CERROR("%s: Fid is insane "DFID"\n",
2309 ll_get_fsname(sb, NULL, 0),
2310 PFID(&md.body->mbo_fid1));
2311 GOTO(out, rc = -EINVAL);
2314 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->mbo_fid1,
2315 sbi->ll_flags & LL_SBI_32BIT_API),
2317 if (IS_ERR(*inode)) {
2318 #ifdef CONFIG_FS_POSIX_ACL
2320 posix_acl_release(md.posix_acl);
2321 md.posix_acl = NULL;
2324 rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2326 CERROR("new_inode -fatal: rc %d\n", rc);
2331 /* Handling piggyback layout lock.
2332 * Layout lock can be piggybacked by getattr and open request.
2333 * The lsm can be applied to inode only if it comes with a layout lock
2334 * otherwise correct layout may be overwritten, for example:
2335 * 1. proc1: mdt returns a lsm but not granting layout
2336 * 2. layout was changed by another client
2337 * 3. proc2: refresh layout and layout lock granted
2338 * 4. proc1: to apply a stale layout */
2339 if (it != NULL && it->it_lock_mode != 0) {
2340 struct lustre_handle lockh;
2341 struct ldlm_lock *lock;
2343 lockh.cookie = it->it_lock_handle;
2344 lock = ldlm_handle2lock(&lockh);
2345 LASSERT(lock != NULL);
2346 if (ldlm_has_layout(lock)) {
2347 struct cl_object_conf conf;
2349 memset(&conf, 0, sizeof(conf));
2350 conf.coc_opc = OBJECT_CONF_SET;
2351 conf.coc_inode = *inode;
2352 conf.coc_lock = lock;
2353 conf.u.coc_layout = md.layout;
2354 (void)ll_layout_conf(*inode, &conf);
2356 LDLM_LOCK_PUT(lock);
2362 md_free_lustre_md(sbi->ll_md_exp, &md);
2365 if (rc != 0 && it != NULL && it->it_op & IT_OPEN)
2366 ll_open_cleanup(sb != NULL ? sb : (*inode)->i_sb, req);
2371 int ll_obd_statfs(struct inode *inode, void __user *arg)
2373 struct ll_sb_info *sbi = NULL;
2374 struct obd_export *exp;
2376 struct obd_ioctl_data *data = NULL;
2380 if (!inode || !(sbi = ll_i2sbi(inode)))
2381 GOTO(out_statfs, rc = -EINVAL);
2383 rc = obd_ioctl_getdata(&buf, &len, arg);
2385 GOTO(out_statfs, rc);
2388 if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2389 !data->ioc_pbuf1 || !data->ioc_pbuf2)
2390 GOTO(out_statfs, rc = -EINVAL);
2392 if (data->ioc_inllen1 != sizeof(__u32) ||
2393 data->ioc_inllen2 != sizeof(__u32) ||
2394 data->ioc_plen1 != sizeof(struct obd_statfs) ||
2395 data->ioc_plen2 != sizeof(struct obd_uuid))
2396 GOTO(out_statfs, rc = -EINVAL);
2398 memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2399 if (type & LL_STATFS_LMV)
2400 exp = sbi->ll_md_exp;
2401 else if (type & LL_STATFS_LOV)
2402 exp = sbi->ll_dt_exp;
2404 GOTO(out_statfs, rc = -ENODEV);
2406 rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, NULL);
2408 GOTO(out_statfs, rc);
2410 OBD_FREE_LARGE(buf, len);
2414 int ll_process_config(struct lustre_cfg *lcfg)
2416 struct super_block *sb;
2421 /* The instance name contains the sb: lustre-client-aacfe000 */
2422 ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2423 if (!ptr || !*(++ptr))
2425 if (sscanf(ptr, "%lx", &x) != 1)
2427 sb = (struct super_block *)x;
2428 /* This better be a real Lustre superblock! */
2429 LASSERT(s2lsi(sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2431 /* Note we have not called client_common_fill_super yet, so
2432 proc fns must be able to handle that! */
2433 rc = class_process_proc_param(PARAM_LLITE, lprocfs_llite_obd_vars,
2440 /* this function prepares md_op_data hint for passing it down to MD stack. */
2441 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
2442 struct inode *i1, struct inode *i2,
2443 const char *name, size_t namelen,
2444 __u32 mode, __u32 opc, void *data)
2446 LASSERT(i1 != NULL);
2449 /* Do not reuse namelen for something else. */
2451 return ERR_PTR(-EINVAL);
2453 if (namelen > ll_i2sbi(i1)->ll_namelen)
2454 return ERR_PTR(-ENAMETOOLONG);
2456 if (!lu_name_is_valid_2(name, namelen))
2457 return ERR_PTR(-EINVAL);
2460 if (op_data == NULL)
2461 OBD_ALLOC_PTR(op_data);
2463 if (op_data == NULL)
2464 return ERR_PTR(-ENOMEM);
2466 ll_i2gids(op_data->op_suppgids, i1, i2);
2467 op_data->op_fid1 = *ll_inode2fid(i1);
2468 op_data->op_default_stripe_offset = -1;
2469 if (S_ISDIR(i1->i_mode)) {
2470 op_data->op_mea1 = ll_i2info(i1)->lli_lsm_md;
2471 if (opc == LUSTRE_OPC_MKDIR)
2472 op_data->op_default_stripe_offset =
2473 ll_i2info(i1)->lli_def_stripe_offset;
2477 op_data->op_fid2 = *ll_inode2fid(i2);
2478 if (S_ISDIR(i2->i_mode))
2479 op_data->op_mea2 = ll_i2info(i2)->lli_lsm_md;
2481 fid_zero(&op_data->op_fid2);
2484 if (ll_i2sbi(i1)->ll_flags & LL_SBI_64BIT_HASH)
2485 op_data->op_cli_flags |= CLI_HASH64;
2487 if (ll_need_32bit_api(ll_i2sbi(i1)))
2488 op_data->op_cli_flags |= CLI_API32;
2490 op_data->op_name = name;
2491 op_data->op_namelen = namelen;
2492 op_data->op_mode = mode;
2493 op_data->op_mod_time = cfs_time_current_sec();
2494 op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2495 op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2496 op_data->op_cap = cfs_curproc_cap_pack();
2497 if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2498 filename_is_volatile(name, namelen, &op_data->op_mds)) {
2499 op_data->op_bias |= MDS_CREATE_VOLATILE;
2501 op_data->op_mds = 0;
2503 op_data->op_data = data;
2508 void ll_finish_md_op_data(struct md_op_data *op_data)
2510 security_release_secctx(op_data->op_file_secctx,
2511 op_data->op_file_secctx_size);
2512 OBD_FREE_PTR(op_data);
2515 #ifdef HAVE_SUPEROPS_USE_DENTRY
2516 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2518 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
2521 struct ll_sb_info *sbi;
2523 #ifdef HAVE_SUPEROPS_USE_DENTRY
2524 LASSERT((seq != NULL) && (dentry != NULL));
2525 sbi = ll_s2sbi(dentry->d_sb);
2527 LASSERT((seq != NULL) && (vfs != NULL));
2528 sbi = ll_s2sbi(vfs->mnt_sb);
2531 if (sbi->ll_flags & LL_SBI_NOLCK)
2532 seq_puts(seq, ",nolock");
2534 if (sbi->ll_flags & LL_SBI_FLOCK)
2535 seq_puts(seq, ",flock");
2537 if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2538 seq_puts(seq, ",localflock");
2540 if (sbi->ll_flags & LL_SBI_USER_XATTR)
2541 seq_puts(seq, ",user_xattr");
2543 if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2544 seq_puts(seq, ",lazystatfs");
2546 if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2547 seq_puts(seq, ",user_fid2path");
2549 if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
2550 seq_puts(seq, ",always_ping");
2556 * Get obd name by cmd, and copy out to user space
2558 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2560 struct ll_sb_info *sbi = ll_i2sbi(inode);
2561 struct obd_device *obd;
2564 if (cmd == OBD_IOC_GETDTNAME)
2565 obd = class_exp2obd(sbi->ll_dt_exp);
2566 else if (cmd == OBD_IOC_GETMDNAME)
2567 obd = class_exp2obd(sbi->ll_md_exp);
2574 if (copy_to_user((void __user *)arg, obd->obd_name,
2575 strlen(obd->obd_name) + 1))
2582 * Get lustre file system name by \a sbi. If \a buf is provided(non-NULL), the
2583 * fsname will be returned in this buffer; otherwise, a static buffer will be
2584 * used to store the fsname and returned to caller.
2586 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
2588 static char fsname_static[MTI_NAME_MAXLEN];
2589 struct lustre_sb_info *lsi = s2lsi(sb);
2594 /* this means the caller wants to use static buffer
2595 * and it doesn't care about race. Usually this is
2596 * in error reporting path */
2597 buf = fsname_static;
2598 buflen = sizeof(fsname_static);
2601 len = strlen(lsi->lsi_lmd->lmd_profile);
2602 ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
2603 if (ptr && (strcmp(ptr, "-client") == 0))
2606 if (unlikely(len >= buflen))
2608 strncpy(buf, lsi->lsi_lmd->lmd_profile, len);
2614 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
2621 p.mnt = current->fs->root.mnt;
2623 path = d_path(&p, buf, bufsize);
2628 void ll_dirty_page_discard_warn(struct page *page, int ioret)
2630 char *buf, *path = NULL;
2631 struct dentry *dentry = NULL;
2632 struct inode *inode = page->mapping->host;
2634 /* this can be called inside spin lock so use GFP_ATOMIC. */
2635 buf = (char *)__get_free_page(GFP_ATOMIC);
2637 dentry = d_find_alias(page->mapping->host);
2639 path = ll_d_path(dentry, buf, PAGE_SIZE);
2643 "%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
2644 "(rc %d)\n", ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
2645 s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2646 PFID(ll_inode2fid(inode)),
2647 (path && !IS_ERR(path)) ? path : "", ioret);
2653 free_page((unsigned long)buf);
2656 ssize_t ll_copy_user_md(const struct lov_user_md __user *md,
2657 struct lov_user_md **kbuf)
2659 struct lov_user_md lum;
2663 if (copy_from_user(&lum, md, sizeof(lum)))
2666 lum_size = ll_lov_user_md_size(&lum);
2670 OBD_ALLOC(*kbuf, lum_size);
2674 if (copy_from_user(*kbuf, md, lum_size) != 0) {
2675 OBD_FREE(*kbuf, lum_size);
2683 * Compute llite root squash state after a change of root squash
2684 * configuration setting or add/remove of a lnet nid
2686 void ll_compute_rootsquash_state(struct ll_sb_info *sbi)
2688 struct root_squash_info *squash = &sbi->ll_squash;
2691 struct lnet_process_id id;
2693 /* Update norootsquash flag */
2694 down_write(&squash->rsi_sem);
2695 if (list_empty(&squash->rsi_nosquash_nids))
2696 sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2698 /* Do not apply root squash as soon as one of our NIDs is
2699 * in the nosquash_nids list */
2702 while (LNetGetId(i++, &id) != -ENOENT) {
2703 if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
2705 if (cfs_match_nid(id.nid, &squash->rsi_nosquash_nids)) {
2711 sbi->ll_flags |= LL_SBI_NOROOTSQUASH;
2713 sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2715 up_write(&squash->rsi_sem);
2719 * Parse linkea content to extract information about a given hardlink
2721 * \param[in] ldata - Initialized linkea data
2722 * \param[in] linkno - Link identifier
2723 * \param[out] parent_fid - The entry's parent FID
2724 * \param[out] ln - Entry name destination buffer
2726 * \retval 0 on success
2727 * \retval Appropriate negative error code on failure
2729 static int ll_linkea_decode(struct linkea_data *ldata, unsigned int linkno,
2730 struct lu_fid *parent_fid, struct lu_name *ln)
2736 rc = linkea_init_with_rec(ldata);
2740 if (linkno >= ldata->ld_leh->leh_reccount)
2741 /* beyond last link */
2744 linkea_first_entry(ldata);
2745 for (idx = 0; ldata->ld_lee != NULL; idx++) {
2746 linkea_entry_unpack(ldata->ld_lee, &ldata->ld_reclen, ln,
2751 linkea_next_entry(ldata);
2761 * Get parent FID and name of an identified link. Operation is performed for
2762 * a given link number, letting the caller iterate over linkno to list one or
2763 * all links of an entry.
2765 * \param[in] file - File descriptor against which to perform the operation
2766 * \param[in,out] arg - User-filled structure containing the linkno to operate
2767 * on and the available size. It is eventually filled with
2768 * the requested information or left untouched on error
2770 * \retval - 0 on success
2771 * \retval - Appropriate negative error code on failure
2773 int ll_getparent(struct file *file, struct getparent __user *arg)
2775 struct inode *inode = file_inode(file);
2776 struct linkea_data *ldata;
2777 struct lu_buf buf = LU_BUF_NULL;
2779 struct lu_fid parent_fid;
2786 if (!cfs_capable(CFS_CAP_DAC_READ_SEARCH) &&
2787 !(ll_i2sbi(inode)->ll_flags & LL_SBI_USER_FID2PATH))
2790 if (get_user(name_size, &arg->gp_name_size))
2793 if (get_user(linkno, &arg->gp_linkno))
2796 if (name_size > PATH_MAX)
2799 OBD_ALLOC(ldata, sizeof(*ldata));
2803 rc = linkea_data_new(ldata, &buf);
2805 GOTO(ldata_free, rc);
2807 #ifdef HAVE_XATTR_HANDLER_FLAGS
2808 rc = ll_xattr_list(inode, XATTR_NAME_LINK, XATTR_TRUSTED_T, buf.lb_buf,
2809 buf.lb_len, OBD_MD_FLXATTR);
2811 rc = ll_getxattr(file_dentry(file), XATTR_NAME_LINK, buf.lb_buf,
2813 #endif /* HAVE_XATTR_HANDLER_FLAGS */
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));