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, 2017, 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/random.h>
41 #include <linux/statfs.h>
42 #include <linux/time.h>
43 #include <linux/types.h>
44 #include <libcfs/linux/linux-uuid.h>
45 #include <linux/version.h>
47 #include <linux/user_namespace.h>
48 #ifdef HAVE_UIDGID_HEADER
49 # include <linux/uidgid.h>
51 #include <linux/security.h>
53 #include <uapi/linux/lustre/lustre_ioctl.h>
54 #include <lustre_ha.h>
55 #include <lustre_dlm.h>
56 #include <lprocfs_status.h>
57 #include <lustre_disk.h>
58 #include <uapi/linux/lustre/lustre_param.h>
59 #include <lustre_log.h>
60 #include <cl_object.h>
61 #include <obd_cksum.h>
62 #include "llite_internal.h"
64 struct kmem_cache *ll_file_data_slab;
67 #define log2(n) ffz(~(n))
70 static struct ll_sb_info *ll_init_sbi(void)
72 struct ll_sb_info *sbi = NULL;
74 unsigned long lru_page_max;
83 spin_lock_init(&sbi->ll_lock);
84 mutex_init(&sbi->ll_lco.lco_lock);
85 spin_lock_init(&sbi->ll_pp_extent_lock);
86 spin_lock_init(&sbi->ll_process_lock);
87 sbi->ll_rw_stats_on = 0;
90 pages = si.totalram - si.totalhigh;
91 lru_page_max = pages / 2;
93 /* initialize ll_cache data */
94 sbi->ll_cache = cl_cache_init(lru_page_max);
95 if (sbi->ll_cache == NULL) {
96 OBD_FREE(sbi, sizeof(*sbi));
100 sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
101 SBI_DEFAULT_READAHEAD_MAX);
102 sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
103 sbi->ll_ra_info.ra_max_read_ahead_whole_pages = -1;
105 sbi->ll_flags |= LL_SBI_VERBOSE;
106 #ifdef ENABLE_CHECKSUM
107 sbi->ll_flags |= LL_SBI_CHECKSUM;
110 sbi->ll_flags |= LL_SBI_FLOCK;
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_running_max = LL_SA_RUNNING_DEF;
127 sbi->ll_sa_max = LL_SA_RPC_DEF;
128 atomic_set(&sbi->ll_sa_total, 0);
129 atomic_set(&sbi->ll_sa_wrong, 0);
130 atomic_set(&sbi->ll_sa_running, 0);
131 atomic_set(&sbi->ll_agl_total, 0);
132 sbi->ll_flags |= LL_SBI_AGL_ENABLED;
133 sbi->ll_flags |= LL_SBI_FAST_READ;
134 sbi->ll_flags |= LL_SBI_TINY_WRITE;
137 sbi->ll_squash.rsi_uid = 0;
138 sbi->ll_squash.rsi_gid = 0;
139 INIT_LIST_HEAD(&sbi->ll_squash.rsi_nosquash_nids);
140 init_rwsem(&sbi->ll_squash.rsi_sem);
142 /* Per-filesystem file heat */
143 sbi->ll_heat_decay_weight = SBI_DEFAULT_HEAT_DECAY_WEIGHT;
144 sbi->ll_heat_period_second = SBI_DEFAULT_HEAT_PERIOD_SECOND;
148 static void ll_free_sbi(struct super_block *sb)
150 struct ll_sb_info *sbi = ll_s2sbi(sb);
154 if (!list_empty(&sbi->ll_squash.rsi_nosquash_nids))
155 cfs_free_nidlist(&sbi->ll_squash.rsi_nosquash_nids);
156 if (sbi->ll_cache != NULL) {
157 cl_cache_decref(sbi->ll_cache);
158 sbi->ll_cache = NULL;
160 OBD_FREE(sbi, sizeof(*sbi));
165 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
166 struct vfsmount *mnt)
168 struct inode *root = NULL;
169 struct ll_sb_info *sbi = ll_s2sbi(sb);
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 sbi->ll_md_obd = class_name2obd(md);
181 if (!sbi->ll_md_obd) {
182 CERROR("MD %s: not setup or attached\n", md);
196 /* pass client page size via ocd_grant_blkbits, the server should report
197 * back its backend blocksize for grant calculation purpose */
198 data->ocd_grant_blkbits = PAGE_SHIFT;
200 /* indicate MDT features supported by this client */
201 data->ocd_connect_flags = OBD_CONNECT_IBITS | OBD_CONNECT_NODEVOH |
202 OBD_CONNECT_ATTRFID | OBD_CONNECT_GRANT |
203 OBD_CONNECT_VERSION | OBD_CONNECT_BRW_SIZE |
204 OBD_CONNECT_SRVLOCK | OBD_CONNECT_TRUNCLOCK|
205 OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
206 OBD_CONNECT_CANCELSET | OBD_CONNECT_FID |
207 OBD_CONNECT_AT | OBD_CONNECT_LOV_V3 |
208 OBD_CONNECT_VBR | OBD_CONNECT_FULL20 |
209 OBD_CONNECT_64BITHASH |
210 OBD_CONNECT_EINPROGRESS |
211 OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
212 OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS|
213 OBD_CONNECT_MAX_EASIZE |
214 OBD_CONNECT_FLOCK_DEAD |
215 OBD_CONNECT_DISP_STRIPE | OBD_CONNECT_LFSCK |
216 OBD_CONNECT_OPEN_BY_FID |
217 OBD_CONNECT_DIR_STRIPE |
218 OBD_CONNECT_BULK_MBITS | OBD_CONNECT_CKSUM |
219 OBD_CONNECT_SUBTREE |
220 OBD_CONNECT_MULTIMODRPCS |
221 OBD_CONNECT_GRANT_PARAM |
222 OBD_CONNECT_SHORTIO | OBD_CONNECT_FLAGS2;
224 data->ocd_connect_flags2 = OBD_CONNECT2_DIR_MIGRATE |
225 OBD_CONNECT2_SUM_STATFS |
226 OBD_CONNECT2_OVERSTRIPING |
228 OBD_CONNECT2_LOCK_CONVERT |
229 OBD_CONNECT2_ARCHIVE_ID_ARRAY |
231 OBD_CONNECT2_ASYNC_DISCARD;
233 #ifdef HAVE_LRU_RESIZE_SUPPORT
234 if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
235 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
237 #ifdef CONFIG_FS_POSIX_ACL
238 data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK |
239 OBD_CONNECT_LARGE_ACL;
242 data->ocd_cksum_types = obd_cksum_types_supported_client();
244 if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
245 /* flag mdc connection as lightweight, only used for test
246 * purpose, use with care */
247 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
249 data->ocd_ibits_known = MDS_INODELOCK_FULL;
250 data->ocd_version = LUSTRE_VERSION_CODE;
252 if (sb->s_flags & MS_RDONLY)
253 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
254 if (sbi->ll_flags & LL_SBI_USER_XATTR)
255 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
258 /* Setting this indicates we correctly support S_NOSEC (See kernel
259 * commit 9e1f1de02c2275d7172e18dc4e7c2065777611bf)
261 sb->s_flags |= MS_NOSEC;
264 if (sbi->ll_flags & LL_SBI_FLOCK)
265 sbi->ll_fop = &ll_file_operations_flock;
266 else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
267 sbi->ll_fop = &ll_file_operations;
269 sbi->ll_fop = &ll_file_operations_noflock;
271 /* always ping even if server suppress_pings */
272 if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
273 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
275 obd_connect_set_secctx(data);
277 #if defined(CONFIG_SECURITY)
278 data->ocd_connect_flags2 |= OBD_CONNECT2_SELINUX_POLICY;
281 data->ocd_brw_size = MD_MAX_BRW_SIZE;
283 err = obd_connect(NULL, &sbi->ll_md_exp, sbi->ll_md_obd,
284 &sbi->ll_sb_uuid, data, sbi->ll_cache);
286 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
287 "recovery, of which this client is not a "
288 "part. Please wait for recovery to complete,"
289 " abort, or time out.\n", md);
292 CERROR("cannot connect to %s: rc = %d\n", md, err);
296 sbi->ll_md_exp->exp_connect_data = *data;
298 err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
299 LUSTRE_SEQ_METADATA);
301 CERROR("%s: Can't init metadata layer FID infrastructure, "
302 "rc = %d\n", sbi->ll_md_exp->exp_obd->obd_name, err);
306 /* For mount, we only need fs info from MDT0, and also in DNE, it
307 * can make sure the client can be mounted as long as MDT0 is
309 err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
310 ktime_get_seconds() - OBD_STATFS_CACHE_SECONDS,
311 OBD_STATFS_FOR_MDT0);
313 GOTO(out_md_fid, err);
315 /* This needs to be after statfs to ensure connect has finished.
316 * Note that "data" does NOT contain the valid connect reply.
317 * If connecting to a 1.8 server there will be no LMV device, so
318 * we can access the MDC export directly and exp_connect_flags will
319 * be non-zero, but if accessing an upgraded 2.1 server it will
320 * have the correct flags filled in.
321 * XXX: fill in the LMV exp_connect_flags from MDC(s). */
322 valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
323 if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
324 valid != CLIENT_CONNECT_MDT_REQD) {
327 OBD_ALLOC_WAIT(buf, PAGE_SIZE);
328 obd_connect_flags2str(buf, PAGE_SIZE,
329 valid ^ CLIENT_CONNECT_MDT_REQD, 0, ",");
330 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
331 "feature(s) needed for correct operation "
332 "of this client (%s). Please upgrade "
333 "server or downgrade client.\n",
334 sbi->ll_md_exp->exp_obd->obd_name, buf);
335 OBD_FREE(buf, PAGE_SIZE);
336 GOTO(out_md_fid, err = -EPROTO);
339 size = sizeof(*data);
340 err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
341 KEY_CONN_DATA, &size, data);
343 CERROR("%s: Get connect data failed: rc = %d\n",
344 sbi->ll_md_exp->exp_obd->obd_name, err);
345 GOTO(out_md_fid, err);
348 LASSERT(osfs->os_bsize);
349 sb->s_blocksize = osfs->os_bsize;
350 sb->s_blocksize_bits = log2(osfs->os_bsize);
351 sb->s_magic = LL_SUPER_MAGIC;
352 sb->s_maxbytes = MAX_LFS_FILESIZE;
353 sbi->ll_namelen = osfs->os_namelen;
354 sbi->ll_mnt.mnt = current->fs->root.mnt;
356 if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
357 !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
358 LCONSOLE_INFO("Disabling user_xattr feature because "
359 "it is not supported on the server\n");
360 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
363 if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
365 sb->s_flags |= MS_POSIXACL;
367 sbi->ll_flags |= LL_SBI_ACL;
369 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
371 sb->s_flags &= ~MS_POSIXACL;
373 sbi->ll_flags &= ~LL_SBI_ACL;
376 if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
377 sbi->ll_flags |= LL_SBI_64BIT_HASH;
379 if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK)
380 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
382 if (obd_connect_has_secctx(data))
383 sbi->ll_flags |= LL_SBI_FILE_SECCTX;
385 if (data->ocd_ibits_known & MDS_INODELOCK_XATTR) {
386 if (!(data->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)) {
387 LCONSOLE_INFO("%s: disabling xattr cache due to "
388 "unknown maximum xattr size.\n", dt);
389 } else if (!sbi->ll_xattr_cache_set) {
390 /* If xattr_cache is already set (no matter 0 or 1)
391 * during processing llog, it won't be enabled here. */
392 sbi->ll_flags |= LL_SBI_XATTR_CACHE;
393 sbi->ll_xattr_cache_enabled = 1;
397 sbi->ll_dt_obd = class_name2obd(dt);
398 if (!sbi->ll_dt_obd) {
399 CERROR("DT %s: not setup or attached\n", dt);
400 GOTO(out_md_fid, err = -ENODEV);
403 /* pass client page size via ocd_grant_blkbits, the server should report
404 * back its backend blocksize for grant calculation purpose */
405 data->ocd_grant_blkbits = PAGE_SHIFT;
407 /* indicate OST features supported by this client */
408 data->ocd_connect_flags = OBD_CONNECT_GRANT | OBD_CONNECT_VERSION |
409 OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
410 OBD_CONNECT_CANCELSET | OBD_CONNECT_FID |
411 OBD_CONNECT_SRVLOCK | OBD_CONNECT_TRUNCLOCK|
412 OBD_CONNECT_AT | OBD_CONNECT_OSS_CAPA |
413 OBD_CONNECT_VBR | OBD_CONNECT_FULL20 |
414 OBD_CONNECT_64BITHASH | OBD_CONNECT_MAXBYTES |
415 OBD_CONNECT_EINPROGRESS |
416 OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
417 OBD_CONNECT_LAYOUTLOCK |
418 OBD_CONNECT_PINGLESS | OBD_CONNECT_LFSCK |
419 OBD_CONNECT_BULK_MBITS | OBD_CONNECT_SHORTIO |
420 OBD_CONNECT_FLAGS2 | OBD_CONNECT_GRANT_SHRINK;
422 /* The client currently advertises support for OBD_CONNECT_LOCKAHEAD_OLD so it
423 * can interoperate with an older version of lockahead which was released prior
424 * to landing in master. This support will be dropped when 2.13 development
425 * starts. At the point, we should not just drop the connect flag (below), we
426 * should also remove the support in the code.
428 * Removing it means a few things:
429 * 1. Remove this section here
430 * 2. Remove CEF_NONBLOCK in ll_file_lockahead()
431 * 3. Remove function exp_connect_lockahead_old
432 * 4. Remove LDLM_FL_LOCKAHEAD_OLD_RESERVED in lustre_dlm_flags.h
434 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 12, 50, 0)
435 data->ocd_connect_flags |= OBD_CONNECT_LOCKAHEAD_OLD;
438 data->ocd_connect_flags2 = OBD_CONNECT2_LOCKAHEAD;
440 if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_GRANT_PARAM))
441 data->ocd_connect_flags |= OBD_CONNECT_GRANT_PARAM;
443 /* OBD_CONNECT_CKSUM should always be set, even if checksums are
444 * disabled by default, because it can still be enabled on the
445 * fly via /sys. As a consequence, we still need to come to an
446 * agreement on the supported algorithms at connect time
448 data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
450 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
451 data->ocd_cksum_types = OBD_CKSUM_ADLER;
453 data->ocd_cksum_types = obd_cksum_types_supported_client();
455 #ifdef HAVE_LRU_RESIZE_SUPPORT
456 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
458 /* always ping even if server suppress_pings */
459 if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
460 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
462 CDEBUG(D_RPCTRACE, "ocd_connect_flags: %#llx ocd_version: %d "
463 "ocd_grant: %d\n", data->ocd_connect_flags,
464 data->ocd_version, data->ocd_grant);
466 sbi->ll_dt_obd->obd_upcall.onu_owner = &sbi->ll_lco;
467 sbi->ll_dt_obd->obd_upcall.onu_upcall = cl_ocd_update;
469 data->ocd_brw_size = DT_MAX_BRW_SIZE;
471 err = obd_connect(NULL, &sbi->ll_dt_exp, sbi->ll_dt_obd,
472 &sbi->ll_sb_uuid, data, sbi->ll_cache);
474 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
475 "recovery, of which this client is not a "
476 "part. Please wait for recovery to "
477 "complete, abort, or time out.\n", dt);
480 CERROR("%s: Cannot connect to %s: rc = %d\n",
481 sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
485 sbi->ll_dt_exp->exp_connect_data = *data;
487 /* Don't change value if it was specified in the config log */
488 if (sbi->ll_ra_info.ra_max_read_ahead_whole_pages == -1) {
489 sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
490 max_t(unsigned long, SBI_DEFAULT_READAHEAD_WHOLE_MAX,
491 (data->ocd_brw_size >> PAGE_SHIFT));
492 if (sbi->ll_ra_info.ra_max_read_ahead_whole_pages >
493 sbi->ll_ra_info.ra_max_pages_per_file)
494 sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
495 sbi->ll_ra_info.ra_max_pages_per_file;
498 err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
499 LUSTRE_SEQ_METADATA);
501 CERROR("%s: Can't init data layer FID infrastructure, "
502 "rc = %d\n", sbi->ll_dt_exp->exp_obd->obd_name, err);
506 mutex_lock(&sbi->ll_lco.lco_lock);
507 sbi->ll_lco.lco_flags = data->ocd_connect_flags;
508 sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
509 sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
510 mutex_unlock(&sbi->ll_lco.lco_lock);
512 fid_zero(&sbi->ll_root_fid);
513 err = md_get_root(sbi->ll_md_exp, get_mount_fileset(sb),
516 CERROR("cannot mds_connect: rc = %d\n", err);
517 GOTO(out_lock_cn_cb, err);
519 if (!fid_is_sane(&sbi->ll_root_fid)) {
520 CERROR("%s: Invalid root fid "DFID" during mount\n",
521 sbi->ll_md_exp->exp_obd->obd_name,
522 PFID(&sbi->ll_root_fid));
523 GOTO(out_lock_cn_cb, err = -EINVAL);
525 CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
527 sb->s_op = &lustre_super_operations;
528 #ifdef HAVE_XATTR_HANDLER_FLAGS
529 sb->s_xattr = ll_xattr_handlers;
531 #if THREAD_SIZE >= 8192 /*b=17630*/
532 sb->s_export_op = &lustre_export_operations;
536 * XXX: move this to after cbd setup? */
537 valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMODEASIZE;
538 if (sbi->ll_flags & LL_SBI_ACL)
539 valid |= OBD_MD_FLACL;
541 OBD_ALLOC_PTR(op_data);
543 GOTO(out_lock_cn_cb, err = -ENOMEM);
545 op_data->op_fid1 = sbi->ll_root_fid;
546 op_data->op_mode = 0;
547 op_data->op_valid = valid;
549 err = md_getattr(sbi->ll_md_exp, op_data, &request);
551 OBD_FREE_PTR(op_data);
553 CERROR("%s: md_getattr failed for root: rc = %d\n",
554 sbi->ll_md_exp->exp_obd->obd_name, err);
555 GOTO(out_lock_cn_cb, err);
558 err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
559 sbi->ll_md_exp, &lmd);
561 CERROR("failed to understand root inode md: rc = %d\n", err);
562 ptlrpc_req_finished(request);
563 GOTO(out_lock_cn_cb, err);
566 LASSERT(fid_is_sane(&sbi->ll_root_fid));
567 root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
568 sbi->ll_flags & LL_SBI_32BIT_API),
570 md_free_lustre_md(sbi->ll_md_exp, &lmd);
571 ptlrpc_req_finished(request);
574 #ifdef CONFIG_FS_POSIX_ACL
576 posix_acl_release(lmd.posix_acl);
577 lmd.posix_acl = NULL;
580 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
582 CERROR("lustre_lite: bad iget4 for root\n");
586 checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
587 if (sbi->ll_checksum_set) {
588 err = obd_set_info_async(NULL, sbi->ll_dt_exp,
589 sizeof(KEY_CHECKSUM), KEY_CHECKSUM,
590 sizeof(checksum), &checksum, NULL);
592 CERROR("%s: Set checksum failed: rc = %d\n",
593 sbi->ll_dt_exp->exp_obd->obd_name, err);
599 sb->s_root = d_make_root(root);
600 if (sb->s_root == NULL) {
602 CERROR("%s: can't make root dentry: rc = %d\n",
603 sbi->ll_fsname, err);
606 #ifdef HAVE_DCACHE_LOCK
607 sb->s_root->d_op = &ll_d_ops;
610 sbi->ll_sdev_orig = sb->s_dev;
612 /* We set sb->s_dev equal on all lustre clients in order to support
613 * NFS export clustering. NFSD requires that the FSID be the same
615 /* s_dev is also used in lt_compare() to compare two fs, but that is
616 * only a node-local comparison. */
617 uuid = obd_get_uuid(sbi->ll_md_exp);
619 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
626 if (sbi->ll_dt_obd) {
627 err = sysfs_create_link(&sbi->ll_kset.kobj,
628 &sbi->ll_dt_obd->obd_kset.kobj,
629 sbi->ll_dt_obd->obd_type->typ_name);
631 CERROR("%s: could not register %s in llite: rc = %d\n",
632 dt, sbi->ll_fsname, err);
637 if (sbi->ll_md_obd) {
638 err = sysfs_create_link(&sbi->ll_kset.kobj,
639 &sbi->ll_md_obd->obd_kset.kobj,
640 sbi->ll_md_obd->obd_type->typ_name);
642 CERROR("%s: could not register %s in llite: rc = %d\n",
643 md, sbi->ll_fsname, err);
653 obd_fid_fini(sbi->ll_dt_exp->exp_obd);
655 obd_disconnect(sbi->ll_dt_exp);
656 sbi->ll_dt_exp = NULL;
657 sbi->ll_dt_obd = NULL;
659 obd_fid_fini(sbi->ll_md_exp->exp_obd);
661 obd_disconnect(sbi->ll_md_exp);
662 sbi->ll_md_exp = NULL;
663 sbi->ll_md_obd = NULL;
672 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
676 size = sizeof(*lmmsize);
677 rc = obd_get_info(NULL, sbi->ll_dt_exp, sizeof(KEY_MAX_EASIZE),
678 KEY_MAX_EASIZE, &size, lmmsize);
680 CERROR("%s: cannot get max LOV EA size: rc = %d\n",
681 sbi->ll_dt_exp->exp_obd->obd_name, rc);
685 CDEBUG(D_INFO, "max LOV ea size: %d\n", *lmmsize);
688 rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
689 KEY_MAX_EASIZE, &size, lmmsize);
691 CERROR("Get max mdsize error rc %d\n", rc);
693 CDEBUG(D_INFO, "max LMV ea size: %d\n", *lmmsize);
699 * Get the value of the default_easize parameter.
701 * \see client_obd::cl_default_mds_easize
703 * \param[in] sbi superblock info for this filesystem
704 * \param[out] lmmsize pointer to storage location for value
706 * \retval 0 on success
707 * \retval negative negated errno on failure
709 int ll_get_default_mdsize(struct ll_sb_info *sbi, int *lmmsize)
714 rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_DEFAULT_EASIZE),
715 KEY_DEFAULT_EASIZE, &size, lmmsize);
717 CERROR("Get default mdsize error rc %d\n", rc);
723 * Set the default_easize parameter to the given value.
725 * \see client_obd::cl_default_mds_easize
727 * \param[in] sbi superblock info for this filesystem
728 * \param[in] lmmsize the size to set
730 * \retval 0 on success
731 * \retval negative negated errno on failure
733 int ll_set_default_mdsize(struct ll_sb_info *sbi, int lmmsize)
737 if (lmmsize < sizeof(struct lov_mds_md) ||
738 lmmsize > OBD_MAX_DEFAULT_EA_SIZE)
741 rc = obd_set_info_async(NULL, sbi->ll_md_exp,
742 sizeof(KEY_DEFAULT_EASIZE), KEY_DEFAULT_EASIZE,
743 sizeof(int), &lmmsize, NULL);
748 static void client_common_put_super(struct super_block *sb)
750 struct ll_sb_info *sbi = ll_s2sbi(sb);
755 obd_fid_fini(sbi->ll_dt_exp->exp_obd);
756 obd_disconnect(sbi->ll_dt_exp);
757 sbi->ll_dt_exp = NULL;
759 ll_debugfs_unregister_super(sb);
761 obd_fid_fini(sbi->ll_md_exp->exp_obd);
762 obd_disconnect(sbi->ll_md_exp);
763 sbi->ll_md_exp = NULL;
768 void ll_kill_super(struct super_block *sb)
770 struct ll_sb_info *sbi;
774 if (!(sb->s_flags & MS_ACTIVE))
778 /* we need restore s_dev from changed for clustred NFS before put_super
779 * because new kernels have cached s_dev and change sb->s_dev in
780 * put_super not affected real removing devices */
782 sb->s_dev = sbi->ll_sdev_orig;
783 sbi->ll_umounting = 1;
785 /* wait running statahead threads to quit */
786 while (atomic_read(&sbi->ll_sa_running) > 0) {
787 set_current_state(TASK_UNINTERRUPTIBLE);
788 schedule_timeout(msecs_to_jiffies(MSEC_PER_SEC >> 3));
795 static inline int ll_set_opt(const char *opt, char *data, int fl)
797 if (strncmp(opt, data, strlen(opt)) != 0)
803 /* non-client-specific mount options are parsed in lmd_parse */
804 static int ll_options(char *options, struct ll_sb_info *sbi)
807 char *s1 = options, *s2;
808 int *flags = &sbi->ll_flags;
814 CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
817 CDEBUG(D_SUPER, "next opt=%s\n", s1);
818 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
823 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
828 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
833 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
838 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
843 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
848 tmp = ll_set_opt("context", s1, 1);
851 tmp = ll_set_opt("fscontext", s1, 1);
854 tmp = ll_set_opt("defcontext", s1, 1);
857 tmp = ll_set_opt("rootcontext", s1, 1);
860 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
865 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
871 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
874 sbi->ll_checksum_set = 1;
877 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
880 sbi->ll_checksum_set = 1;
883 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
888 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
893 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
898 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
903 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
908 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
913 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
918 tmp = ll_set_opt("always_ping", s1, LL_SBI_ALWAYS_PING);
923 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
929 s2 = strchr(s1, ',');
937 void ll_lli_init(struct ll_inode_info *lli)
939 lli->lli_inode_magic = LLI_INODE_MAGIC;
941 spin_lock_init(&lli->lli_lock);
942 lli->lli_posix_acl = NULL;
943 /* Do not set lli_fid, it has been initialized already. */
944 fid_zero(&lli->lli_pfid);
945 lli->lli_mds_read_och = NULL;
946 lli->lli_mds_write_och = NULL;
947 lli->lli_mds_exec_och = NULL;
948 lli->lli_open_fd_read_count = 0;
949 lli->lli_open_fd_write_count = 0;
950 lli->lli_open_fd_exec_count = 0;
951 mutex_init(&lli->lli_och_mutex);
952 spin_lock_init(&lli->lli_agl_lock);
953 spin_lock_init(&lli->lli_layout_lock);
954 ll_layout_version_set(lli, CL_LAYOUT_GEN_NONE);
955 lli->lli_clob = NULL;
957 init_rwsem(&lli->lli_xattrs_list_rwsem);
958 mutex_init(&lli->lli_xattrs_enq_lock);
960 LASSERT(lli->lli_vfs_inode.i_mode != 0);
961 if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
962 mutex_init(&lli->lli_readdir_mutex);
963 lli->lli_opendir_key = NULL;
965 spin_lock_init(&lli->lli_sa_lock);
966 lli->lli_opendir_pid = 0;
967 lli->lli_sa_enabled = 0;
968 lli->lli_def_stripe_offset = -1;
969 init_rwsem(&lli->lli_lsm_sem);
971 mutex_init(&lli->lli_size_mutex);
972 lli->lli_symlink_name = NULL;
973 init_rwsem(&lli->lli_trunc_sem);
974 range_lock_tree_init(&lli->lli_write_tree);
975 init_rwsem(&lli->lli_glimpse_sem);
976 lli->lli_glimpse_time = ktime_set(0, 0);
977 INIT_LIST_HEAD(&lli->lli_agl_list);
978 lli->lli_agl_index = 0;
979 lli->lli_async_rc = 0;
980 spin_lock_init(&lli->lli_heat_lock);
981 obd_heat_clear(lli->lli_heat_instances, OBD_HEAT_COUNT);
982 lli->lli_heat_flags = 0;
984 mutex_init(&lli->lli_layout_mutex);
985 memset(lli->lli_jobid, 0, sizeof(lli->lli_jobid));
988 #define MAX_STRING_SIZE 128
990 #ifndef HAVE_SUPER_SETUP_BDI_NAME
992 #define LSI_BDI_INITIALIZED 0x00400000
994 #ifndef HAVE_BDI_CAP_MAP_COPY
995 # define BDI_CAP_MAP_COPY 0
998 static int super_setup_bdi_name(struct super_block *sb, char *fmt, ...)
1000 struct lustre_sb_info *lsi = s2lsi(sb);
1001 char buf[MAX_STRING_SIZE];
1005 err = bdi_init(&lsi->lsi_bdi);
1009 lsi->lsi_flags |= LSI_BDI_INITIALIZED;
1010 lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
1011 lsi->lsi_bdi.name = "lustre";
1012 va_start(args, fmt);
1013 vsnprintf(buf, MAX_STRING_SIZE, fmt, args);
1015 err = bdi_register(&lsi->lsi_bdi, NULL, "%s", buf);
1018 sb->s_bdi = &lsi->lsi_bdi;
1022 #endif /* !HAVE_SUPER_SETUP_BDI_NAME */
1024 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
1026 struct lustre_profile *lprof = NULL;
1027 struct lustre_sb_info *lsi = s2lsi(sb);
1028 struct ll_sb_info *sbi = NULL;
1029 char *dt = NULL, *md = NULL;
1030 char *profilenm = get_profile_name(sb);
1031 struct config_llog_instance *cfg;
1032 /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
1033 const int instlen = 16 + 2;
1034 unsigned long cfg_instance = ll_get_cfg_instance(sb);
1035 char name[MAX_STRING_SIZE];
1044 /* for ASLR, to map between cfg_instance and hashed ptr */
1045 CDEBUG(D_VFSTRACE, "VFS Op: cfg_instance %s-%016lx (sb %p)\n",
1046 profilenm, cfg_instance, sb);
1048 try_module_get(THIS_MODULE);
1052 GOTO(out_free_cfg, err = -ENOMEM);
1054 /* client additional sb info */
1055 lsi->lsi_llsbi = sbi = ll_init_sbi();
1057 GOTO(out_free_cfg, err = -ENOMEM);
1059 err = ll_options(lsi->lsi_lmd->lmd_opts, sbi);
1061 GOTO(out_free_cfg, err);
1063 #ifndef HAVE_DCACHE_LOCK
1064 /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
1065 sb->s_d_op = &ll_d_ops;
1068 generate_random_uuid(uuid.b);
1069 snprintf(sbi->ll_sb_uuid.uuid, UUID_SIZE, "%pU", uuid.b);
1071 CDEBUG(D_CONFIG, "llite sb uuid: %s\n", sbi->ll_sb_uuid.uuid);
1074 len = strlen(profilenm);
1075 ptr = strrchr(profilenm, '-');
1076 if (ptr && (strcmp(ptr, "-client") == 0))
1079 if (len > LUSTRE_MAXFSNAME) {
1080 if (unlikely(len >= MAX_STRING_SIZE))
1081 len = MAX_STRING_SIZE - 1;
1082 strncpy(name, profilenm, len);
1084 err = -ENAMETOOLONG;
1085 CERROR("%s: fsname longer than %u characters: rc = %d\n",
1086 name, LUSTRE_MAXFSNAME, err);
1087 GOTO(out_free_cfg, err);
1089 strncpy(sbi->ll_fsname, profilenm, len);
1090 sbi->ll_fsname[len] = '\0';
1093 snprintf(name, sizeof(name), "%.*s-%016lx", len,
1094 profilenm, cfg_instance);
1096 err = super_setup_bdi_name(sb, "%s", name);
1098 GOTO(out_free_cfg, err);
1100 /* Call ll_debugfs_register_super() before lustre_process_log()
1101 * so that "llite.*.*" params can be processed correctly.
1103 err = ll_debugfs_register_super(sb, name);
1105 CERROR("%s: could not register mountpoint in llite: rc = %d\n",
1106 sbi->ll_fsname, err);
1110 /* The cfg_instance is a value unique to this super, in case some
1111 * joker tries to mount the same fs at two mount points.
1113 cfg->cfg_instance = cfg_instance;
1114 cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
1115 cfg->cfg_callback = class_config_llog_handler;
1116 cfg->cfg_sub_clds = CONFIG_SUB_CLIENT;
1117 /* set up client obds */
1118 err = lustre_process_log(sb, profilenm, cfg);
1120 GOTO(out_debugfs, err);
1122 /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1123 lprof = class_get_profile(profilenm);
1124 if (lprof == NULL) {
1125 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1126 " read from the MGS. Does that filesystem "
1127 "exist?\n", profilenm);
1128 GOTO(out_debugfs, err = -EINVAL);
1130 CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1131 lprof->lp_md, lprof->lp_dt);
1133 dt_len = strlen(lprof->lp_dt) + instlen + 2;
1134 OBD_ALLOC(dt, dt_len);
1136 GOTO(out_profile, err = -ENOMEM);
1137 snprintf(dt, dt_len - 1, "%s-%016lx", lprof->lp_dt, cfg_instance);
1139 md_len = strlen(lprof->lp_md) + instlen + 2;
1140 OBD_ALLOC(md, md_len);
1142 GOTO(out_free_dt, err = -ENOMEM);
1143 snprintf(md, md_len - 1, "%s-%016lx", lprof->lp_md, cfg_instance);
1145 /* connections, registrations, sb setup */
1146 err = client_common_fill_super(sb, md, dt, mnt);
1148 GOTO(out_free_md, err);
1150 sbi->ll_client_common_fill_super_succeeded = 1;
1154 OBD_FREE(md, md_len);
1157 OBD_FREE(dt, dt_len);
1160 class_put_profile(lprof);
1163 ll_debugfs_unregister_super(sb);
1170 else if (sbi->ll_flags & LL_SBI_VERBOSE)
1171 LCONSOLE_WARN("Mounted %s\n", profilenm);
1173 } /* ll_fill_super */
1175 void ll_put_super(struct super_block *sb)
1177 struct config_llog_instance cfg, params_cfg;
1178 struct obd_device *obd;
1179 struct lustre_sb_info *lsi = s2lsi(sb);
1180 struct ll_sb_info *sbi = ll_s2sbi(sb);
1181 char *profilenm = get_profile_name(sb);
1182 unsigned long cfg_instance = ll_get_cfg_instance(sb);
1184 int next, force = 1, rc = 0;
1188 GOTO(out_no_sbi, 0);
1190 /* Should replace instance_id with something better for ASLR */
1191 CDEBUG(D_VFSTRACE, "VFS Op: cfg_instance %s-%016lx (sb %p)\n",
1192 profilenm, cfg_instance, sb);
1194 cfg.cfg_instance = cfg_instance;
1195 lustre_end_log(sb, profilenm, &cfg);
1197 params_cfg.cfg_instance = cfg_instance;
1198 lustre_end_log(sb, PARAMS_FILENAME, ¶ms_cfg);
1200 if (sbi->ll_md_exp) {
1201 obd = class_exp2obd(sbi->ll_md_exp);
1203 force = obd->obd_force;
1206 /* Wait for unstable pages to be committed to stable storage */
1208 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
1209 rc = l_wait_event(sbi->ll_cache->ccc_unstable_waitq,
1210 atomic_long_read(&sbi->ll_cache->ccc_unstable_nr) == 0,
1214 ccc_count = atomic_long_read(&sbi->ll_cache->ccc_unstable_nr);
1215 if (force == 0 && rc != -EINTR)
1216 LASSERTF(ccc_count == 0, "count: %li\n", ccc_count);
1218 /* We need to set force before the lov_disconnect in
1219 lustre_common_put_super, since l_d cleans up osc's as well. */
1222 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1224 obd->obd_force = force;
1228 if (sbi->ll_client_common_fill_super_succeeded) {
1229 /* Only if client_common_fill_super succeeded */
1230 client_common_put_super(sb);
1234 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1235 class_manual_cleanup(obd);
1238 if (sbi->ll_flags & LL_SBI_VERBOSE)
1239 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1242 class_del_profile(profilenm);
1244 #ifndef HAVE_SUPER_SETUP_BDI_NAME
1245 if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1246 bdi_destroy(&lsi->lsi_bdi);
1247 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1252 lsi->lsi_llsbi = NULL;
1254 lustre_common_put_super(sb);
1256 cl_env_cache_purge(~0);
1258 module_put(THIS_MODULE);
1261 } /* client_put_super */
1263 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1265 struct inode *inode = NULL;
1267 /* NOTE: we depend on atomic igrab() -bzzz */
1268 lock_res_and_lock(lock);
1269 if (lock->l_resource->lr_lvb_inode) {
1270 struct ll_inode_info * lli;
1271 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1272 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1273 inode = igrab(lock->l_resource->lr_lvb_inode);
1275 inode = lock->l_resource->lr_lvb_inode;
1276 LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ? D_INFO :
1277 D_WARNING, lock, "lr_lvb_inode %p is "
1278 "bogus: magic %08x",
1279 lock->l_resource->lr_lvb_inode,
1280 lli->lli_inode_magic);
1284 unlock_res_and_lock(lock);
1288 void ll_dir_clear_lsm_md(struct inode *inode)
1290 struct ll_inode_info *lli = ll_i2info(inode);
1292 LASSERT(S_ISDIR(inode->i_mode));
1294 if (lli->lli_lsm_md != NULL) {
1295 lmv_free_memmd(lli->lli_lsm_md);
1296 lli->lli_lsm_md = NULL;
1300 static struct inode *ll_iget_anon_dir(struct super_block *sb,
1301 const struct lu_fid *fid,
1302 struct lustre_md *md)
1304 struct ll_sb_info *sbi = ll_s2sbi(sb);
1305 struct mdt_body *body = md->body;
1306 struct inode *inode;
1310 ino = cl_fid_build_ino(fid, sbi->ll_flags & LL_SBI_32BIT_API);
1311 inode = iget_locked(sb, ino);
1312 if (inode == NULL) {
1313 CERROR("%s: failed get simple inode "DFID": rc = -ENOENT\n",
1314 sbi->ll_fsname, PFID(fid));
1315 RETURN(ERR_PTR(-ENOENT));
1318 if (inode->i_state & I_NEW) {
1319 struct ll_inode_info *lli = ll_i2info(inode);
1320 struct lmv_stripe_md *lsm = md->lmv;
1322 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1323 (body->mbo_mode & S_IFMT);
1324 LASSERTF(S_ISDIR(inode->i_mode), "Not slave inode "DFID"\n",
1327 inode->i_mtime.tv_sec = 0;
1328 inode->i_atime.tv_sec = 0;
1329 inode->i_ctime.tv_sec = 0;
1332 #ifdef HAVE_BACKING_DEV_INFO
1333 /* initializing backing dev info. */
1334 inode->i_mapping->backing_dev_info =
1335 &s2lsi(inode->i_sb)->lsi_bdi;
1337 inode->i_op = &ll_dir_inode_operations;
1338 inode->i_fop = &ll_dir_operations;
1339 lli->lli_fid = *fid;
1342 LASSERT(lsm != NULL);
1343 /* master object FID */
1344 lli->lli_pfid = body->mbo_fid1;
1345 CDEBUG(D_INODE, "lli %p slave "DFID" master "DFID"\n",
1346 lli, PFID(fid), PFID(&lli->lli_pfid));
1347 unlock_new_inode(inode);
1353 static int ll_init_lsm_md(struct inode *inode, struct lustre_md *md)
1356 struct lmv_stripe_md *lsm = md->lmv;
1357 struct ll_inode_info *lli = ll_i2info(inode);
1360 LASSERT(lsm != NULL);
1362 CDEBUG(D_INODE, "%s: "DFID" set dir layout:\n",
1363 ll_i2sbi(inode)->ll_fsname, PFID(&lli->lli_fid));
1364 lsm_md_dump(D_INODE, lsm);
1366 /* XXX sigh, this lsm_root initialization should be in
1367 * LMV layer, but it needs ll_iget right now, so we
1368 * put this here right now. */
1369 for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
1370 fid = &lsm->lsm_md_oinfo[i].lmo_fid;
1371 LASSERT(lsm->lsm_md_oinfo[i].lmo_root == NULL);
1373 if (!fid_is_sane(fid))
1376 /* Unfortunately ll_iget will call ll_update_inode,
1377 * where the initialization of slave inode is slightly
1378 * different, so it reset lsm_md to NULL to avoid
1379 * initializing lsm for slave inode. */
1380 lsm->lsm_md_oinfo[i].lmo_root =
1381 ll_iget_anon_dir(inode->i_sb, fid, md);
1382 if (IS_ERR(lsm->lsm_md_oinfo[i].lmo_root)) {
1383 int rc = PTR_ERR(lsm->lsm_md_oinfo[i].lmo_root);
1385 lsm->lsm_md_oinfo[i].lmo_root = NULL;
1387 iput(lsm->lsm_md_oinfo[i].lmo_root);
1388 lsm->lsm_md_oinfo[i].lmo_root = NULL;
1394 lli->lli_lsm_md = lsm;
1399 static int ll_update_lsm_md(struct inode *inode, struct lustre_md *md)
1401 struct ll_inode_info *lli = ll_i2info(inode);
1402 struct lmv_stripe_md *lsm = md->lmv;
1407 LASSERT(S_ISDIR(inode->i_mode));
1408 CDEBUG(D_INODE, "update lsm %p of "DFID"\n", lli->lli_lsm_md,
1409 PFID(ll_inode2fid(inode)));
1412 * no striped information from request, lustre_md from req does not
1413 * include stripeEA, see ll_md_setattr()
1419 * normally dir layout doesn't change, only take read lock to check
1420 * that to avoid blocking other MD operations.
1422 if (lli->lli_lsm_md)
1423 down_read(&lli->lli_lsm_sem);
1425 down_write(&lli->lli_lsm_sem);
1428 * if dir layout mismatch, check whether version is increased, which
1429 * means layout is changed, this happens in dir migration and lfsck.
1431 * foreign LMV should not change.
1433 if (lli->lli_lsm_md &&
1434 lli->lli_lsm_md->lsm_md_magic != LMV_MAGIC_FOREIGN &&
1435 !lsm_md_eq(lli->lli_lsm_md, lsm)) {
1436 if (lsm->lsm_md_layout_version <=
1437 lli->lli_lsm_md->lsm_md_layout_version) {
1438 CERROR("%s: "DFID" dir layout mismatch:\n",
1439 ll_i2sbi(inode)->ll_fsname,
1440 PFID(&lli->lli_fid));
1441 lsm_md_dump(D_ERROR, lli->lli_lsm_md);
1442 lsm_md_dump(D_ERROR, lsm);
1443 GOTO(unlock, rc = -EINVAL);
1446 /* layout changed, switch to write lock */
1447 up_read(&lli->lli_lsm_sem);
1448 down_write(&lli->lli_lsm_sem);
1449 ll_dir_clear_lsm_md(inode);
1452 /* set directory layout */
1453 if (!lli->lli_lsm_md) {
1454 struct cl_attr *attr;
1456 if (lsm->lsm_md_magic == LMV_MAGIC_FOREIGN) {
1457 /* set md->lmv to NULL, so the following free lustre_md
1458 * will not free this lsm */
1460 lli->lli_lsm_md = lsm;
1461 up_write(&lli->lli_lsm_sem);
1465 rc = ll_init_lsm_md(inode, md);
1466 up_write(&lli->lli_lsm_sem);
1470 /* set md->lmv to NULL, so the following free lustre_md
1471 * will not free this lsm */
1475 * md_merge_attr() may take long, since lsm is already set,
1476 * switch to read lock.
1478 down_read(&lli->lli_lsm_sem);
1480 OBD_ALLOC_PTR(attr);
1482 GOTO(unlock, rc = -ENOMEM);
1484 /* validate the lsm */
1485 rc = md_merge_attr(ll_i2mdexp(inode), lsm, attr,
1486 ll_md_blocking_ast);
1492 if (md->body->mbo_valid & OBD_MD_FLNLINK)
1493 md->body->mbo_nlink = attr->cat_nlink;
1494 if (md->body->mbo_valid & OBD_MD_FLSIZE)
1495 md->body->mbo_size = attr->cat_size;
1496 if (md->body->mbo_valid & OBD_MD_FLATIME)
1497 md->body->mbo_atime = attr->cat_atime;
1498 if (md->body->mbo_valid & OBD_MD_FLCTIME)
1499 md->body->mbo_ctime = attr->cat_ctime;
1500 if (md->body->mbo_valid & OBD_MD_FLMTIME)
1501 md->body->mbo_mtime = attr->cat_mtime;
1506 up_read(&lli->lli_lsm_sem);
1511 void ll_clear_inode(struct inode *inode)
1513 struct ll_inode_info *lli = ll_i2info(inode);
1514 struct ll_sb_info *sbi = ll_i2sbi(inode);
1517 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1518 PFID(ll_inode2fid(inode)), inode);
1520 if (S_ISDIR(inode->i_mode)) {
1521 /* these should have been cleared in ll_file_release */
1522 LASSERT(lli->lli_opendir_key == NULL);
1523 LASSERT(lli->lli_sai == NULL);
1524 LASSERT(lli->lli_opendir_pid == 0);
1527 md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1529 LASSERT(!lli->lli_open_fd_write_count);
1530 LASSERT(!lli->lli_open_fd_read_count);
1531 LASSERT(!lli->lli_open_fd_exec_count);
1533 if (lli->lli_mds_write_och)
1534 ll_md_real_close(inode, FMODE_WRITE);
1535 if (lli->lli_mds_exec_och)
1536 ll_md_real_close(inode, FMODE_EXEC);
1537 if (lli->lli_mds_read_och)
1538 ll_md_real_close(inode, FMODE_READ);
1540 if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1541 OBD_FREE(lli->lli_symlink_name,
1542 strlen(lli->lli_symlink_name) + 1);
1543 lli->lli_symlink_name = NULL;
1546 ll_xattr_cache_destroy(inode);
1548 #ifdef CONFIG_FS_POSIX_ACL
1549 forget_all_cached_acls(inode);
1550 if (lli->lli_posix_acl) {
1551 posix_acl_release(lli->lli_posix_acl);
1552 lli->lli_posix_acl = NULL;
1555 lli->lli_inode_magic = LLI_INODE_DEAD;
1557 if (S_ISDIR(inode->i_mode))
1558 ll_dir_clear_lsm_md(inode);
1559 else if (S_ISREG(inode->i_mode) && !is_bad_inode(inode))
1560 LASSERT(list_empty(&lli->lli_agl_list));
1563 * XXX This has to be done before lsm is freed below, because
1564 * cl_object still uses inode lsm.
1566 cl_inode_fini(inode);
1571 static int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data)
1573 struct lustre_md md;
1574 struct inode *inode = dentry->d_inode;
1575 struct ll_sb_info *sbi = ll_i2sbi(inode);
1576 struct ptlrpc_request *request = NULL;
1580 op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1581 LUSTRE_OPC_ANY, NULL);
1582 if (IS_ERR(op_data))
1583 RETURN(PTR_ERR(op_data));
1585 rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &request);
1587 ptlrpc_req_finished(request);
1588 if (rc == -ENOENT) {
1590 /* Unlinked special device node? Or just a race?
1591 * Pretend we done everything. */
1592 if (!S_ISREG(inode->i_mode) &&
1593 !S_ISDIR(inode->i_mode)) {
1594 ia_valid = op_data->op_attr.ia_valid;
1595 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1596 rc = simple_setattr(dentry, &op_data->op_attr);
1597 op_data->op_attr.ia_valid = ia_valid;
1599 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1600 CERROR("md_setattr fails: rc = %d\n", rc);
1605 rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1606 sbi->ll_md_exp, &md);
1608 ptlrpc_req_finished(request);
1612 ia_valid = op_data->op_attr.ia_valid;
1613 /* inode size will be in ll_setattr_ost, can't do it now since dirty
1614 * cache is not cleared yet. */
1615 op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1616 if (S_ISREG(inode->i_mode))
1618 rc = simple_setattr(dentry, &op_data->op_attr);
1619 if (S_ISREG(inode->i_mode))
1620 inode_unlock(inode);
1621 op_data->op_attr.ia_valid = ia_valid;
1623 rc = ll_update_inode(inode, &md);
1624 ptlrpc_req_finished(request);
1629 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1630 * object(s) determine the file size and mtime. Otherwise, the MDS will
1631 * keep these values until such a time that objects are allocated for it.
1632 * We do the MDS operations first, as it is checking permissions for us.
1633 * We don't to the MDS RPC if there is nothing that we want to store there,
1634 * otherwise there is no harm in updating mtime/atime on the MDS if we are
1635 * going to do an RPC anyways.
1637 * If we are doing a truncate, we will send the mtime and ctime updates
1638 * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1639 * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1642 * In case of HSMimport, we only set attr on MDS.
1644 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr,
1645 enum op_xvalid xvalid, bool hsm_import)
1647 struct inode *inode = dentry->d_inode;
1648 struct ll_inode_info *lli = ll_i2info(inode);
1649 struct md_op_data *op_data = NULL;
1653 CDEBUG(D_VFSTRACE, "%s: setattr inode "DFID"(%p) from %llu to %llu, "
1654 "valid %x, hsm_import %d\n",
1655 ll_i2sbi(inode)->ll_fsname, PFID(&lli->lli_fid),
1656 inode, i_size_read(inode), attr->ia_size, attr->ia_valid,
1659 if (attr->ia_valid & ATTR_SIZE) {
1660 /* Check new size against VFS/VM file size limit and rlimit */
1661 rc = inode_newsize_ok(inode, attr->ia_size);
1665 /* The maximum Lustre file size is variable, based on the
1666 * OST maximum object size and number of stripes. This
1667 * needs another check in addition to the VFS check above. */
1668 if (attr->ia_size > ll_file_maxbytes(inode)) {
1669 CDEBUG(D_INODE,"file "DFID" too large %llu > %llu\n",
1670 PFID(&lli->lli_fid), attr->ia_size,
1671 ll_file_maxbytes(inode));
1675 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1678 /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1679 if (attr->ia_valid & TIMES_SET_FLAGS) {
1680 if ((!uid_eq(current_fsuid(), inode->i_uid)) &&
1681 !cfs_capable(CFS_CAP_FOWNER))
1685 /* We mark all of the fields "set" so MDS/OST does not re-set them */
1686 if (!(xvalid & OP_XVALID_CTIME_SET) &&
1687 (attr->ia_valid & ATTR_CTIME)) {
1688 attr->ia_ctime = current_time(inode);
1689 xvalid |= OP_XVALID_CTIME_SET;
1691 if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1692 (attr->ia_valid & ATTR_ATIME)) {
1693 attr->ia_atime = current_time(inode);
1694 attr->ia_valid |= ATTR_ATIME_SET;
1696 if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1697 (attr->ia_valid & ATTR_MTIME)) {
1698 attr->ia_mtime = current_time(inode);
1699 attr->ia_valid |= ATTR_MTIME_SET;
1702 if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1703 CDEBUG(D_INODE, "setting mtime %lld, ctime %lld, now = %lld\n",
1704 (s64)attr->ia_mtime.tv_sec, (s64)attr->ia_ctime.tv_sec,
1705 ktime_get_real_seconds());
1707 if (S_ISREG(inode->i_mode)) {
1708 if (attr->ia_valid & ATTR_SIZE)
1709 inode_dio_write_done(inode);
1710 inode_unlock(inode);
1713 /* We always do an MDS RPC, even if we're only changing the size;
1714 * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1716 OBD_ALLOC_PTR(op_data);
1717 if (op_data == NULL)
1718 GOTO(out, rc = -ENOMEM);
1720 if (!hsm_import && attr->ia_valid & ATTR_SIZE) {
1721 /* If we are changing file size, file content is
1722 * modified, flag it.
1724 xvalid |= OP_XVALID_OWNEROVERRIDE;
1725 op_data->op_bias |= MDS_DATA_MODIFIED;
1726 ll_file_clear_flag(lli, LLIF_DATA_MODIFIED);
1729 if (attr->ia_valid & ATTR_FILE) {
1730 struct ll_file_data *fd = LUSTRE_FPRIVATE(attr->ia_file);
1732 if (fd->fd_lease_och)
1733 op_data->op_bias |= MDS_TRUNC_KEEP_LEASE;
1736 op_data->op_attr = *attr;
1737 op_data->op_xvalid = xvalid;
1739 rc = ll_md_setattr(dentry, op_data);
1743 if (!S_ISREG(inode->i_mode) || hsm_import)
1746 if (attr->ia_valid & (ATTR_SIZE | ATTR_ATIME | ATTR_ATIME_SET |
1747 ATTR_MTIME | ATTR_MTIME_SET | ATTR_CTIME) ||
1748 xvalid & OP_XVALID_CTIME_SET) {
1749 /* For truncate and utimes sending attributes to OSTs, setting
1750 * mtime/atime to the past will be performed under PW [0:EOF]
1751 * extent lock (new_size:EOF for truncate). It may seem
1752 * excessive to send mtime/atime updates to OSTs when not
1753 * setting times to past, but it is necessary due to possible
1754 * time de-synchronization between MDT inode and OST objects
1756 rc = cl_setattr_ost(lli->lli_clob, attr, xvalid, 0);
1759 /* If the file was restored, it needs to set dirty flag.
1761 * We've already sent MDS_DATA_MODIFIED flag in
1762 * ll_md_setattr() for truncate. However, the MDT refuses to
1763 * set the HS_DIRTY flag on released files, so we have to set
1764 * it again if the file has been restored. Please check how
1765 * LLIF_DATA_MODIFIED is set in vvp_io_setattr_fini().
1767 * Please notice that if the file is not released, the previous
1768 * MDS_DATA_MODIFIED has taken effect and usually
1769 * LLIF_DATA_MODIFIED is not set(see vvp_io_setattr_fini()).
1770 * This way we can save an RPC for common open + trunc
1772 if (ll_file_test_and_clear_flag(lli, LLIF_DATA_MODIFIED)) {
1773 struct hsm_state_set hss = {
1774 .hss_valid = HSS_SETMASK,
1775 .hss_setmask = HS_DIRTY,
1779 rc2 = ll_hsm_state_set(inode, &hss);
1780 /* truncate and write can happen at the same time, so that
1781 * the file can be set modified even though the file is not
1782 * restored from released state, and ll_hsm_state_set() is
1783 * not applicable for the file, and rc2 < 0 is normal in this
1786 CDEBUG(D_INFO, DFID "HSM set dirty failed: rc2 = %d\n",
1787 PFID(ll_inode2fid(inode)), rc2);
1792 if (op_data != NULL)
1793 ll_finish_md_op_data(op_data);
1795 if (S_ISREG(inode->i_mode)) {
1797 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1798 inode_dio_wait(inode);
1799 /* Once we've got the i_mutex, it's safe to set the S_NOSEC
1800 * flag. ll_update_inode (called from ll_md_setattr), clears
1801 * inode flags, so there is a gap where S_NOSEC is not set.
1802 * This can cause a writer to take the i_mutex unnecessarily,
1803 * but this is safe to do and should be rare. */
1804 inode_has_no_xattr(inode);
1807 ll_stats_ops_tally(ll_i2sbi(inode), (attr->ia_valid & ATTR_SIZE) ?
1808 LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1813 int ll_setattr(struct dentry *de, struct iattr *attr)
1815 int mode = de->d_inode->i_mode;
1816 enum op_xvalid xvalid = 0;
1818 if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1819 (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1820 xvalid |= OP_XVALID_OWNEROVERRIDE;
1822 if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1823 (ATTR_SIZE|ATTR_MODE)) &&
1824 (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1825 (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1826 !(attr->ia_mode & S_ISGID))))
1827 attr->ia_valid |= ATTR_FORCE;
1829 if ((attr->ia_valid & ATTR_MODE) &&
1831 !(attr->ia_mode & S_ISUID) &&
1832 !(attr->ia_valid & ATTR_KILL_SUID))
1833 attr->ia_valid |= ATTR_KILL_SUID;
1835 if ((attr->ia_valid & ATTR_MODE) &&
1836 ((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1837 !(attr->ia_mode & S_ISGID) &&
1838 !(attr->ia_valid & ATTR_KILL_SGID))
1839 attr->ia_valid |= ATTR_KILL_SGID;
1841 return ll_setattr_raw(de, attr, xvalid, false);
1844 int ll_statfs_internal(struct ll_sb_info *sbi, struct obd_statfs *osfs,
1847 struct obd_statfs obd_osfs = { 0 };
1852 max_age = ktime_get_seconds() - OBD_STATFS_CACHE_SECONDS;
1854 rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1858 osfs->os_type = LL_SUPER_MAGIC;
1860 CDEBUG(D_SUPER, "MDC blocks %llu/%llu objects %llu/%llu\n",
1861 osfs->os_bavail, osfs->os_blocks, osfs->os_ffree, osfs->os_files);
1863 if (osfs->os_state & OS_STATE_SUM)
1866 if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1867 flags |= OBD_STATFS_NODELAY;
1869 rc = obd_statfs(NULL, sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1870 if (rc) /* Possibly a filesystem with no OSTs. Report MDT totals. */
1873 CDEBUG(D_SUPER, "OSC blocks %llu/%llu objects %llu/%llu\n",
1874 obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1877 osfs->os_bsize = obd_osfs.os_bsize;
1878 osfs->os_blocks = obd_osfs.os_blocks;
1879 osfs->os_bfree = obd_osfs.os_bfree;
1880 osfs->os_bavail = obd_osfs.os_bavail;
1882 /* If we have _some_ OSTs, but don't have as many free objects on the
1883 * OSTs as inodes on the MDTs, reduce the reported number of inodes
1884 * to compensate, so that the "inodes in use" number is correct.
1885 * This should be kept in sync with lod_statfs() behaviour.
1887 if (obd_osfs.os_files && obd_osfs.os_ffree < osfs->os_ffree) {
1888 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1890 osfs->os_ffree = obd_osfs.os_ffree;
1896 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1898 struct super_block *sb = de->d_sb;
1899 struct obd_statfs osfs;
1900 __u64 fsid = huge_encode_dev(sb->s_dev);
1903 CDEBUG(D_VFSTRACE, "VFS Op: at %llu jiffies\n", get_jiffies_64());
1904 ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1906 /* Some amount of caching on the client is allowed */
1907 rc = ll_statfs_internal(ll_s2sbi(sb), &osfs, OBD_STATFS_SUM);
1911 statfs_unpack(sfs, &osfs);
1913 /* We need to downshift for all 32-bit kernels, because we can't
1914 * tell if the kernel is being called via sys_statfs64() or not.
1915 * Stop before overflowing f_bsize - in which case it is better
1916 * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1917 if (sizeof(long) < 8) {
1918 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1921 osfs.os_blocks >>= 1;
1922 osfs.os_bfree >>= 1;
1923 osfs.os_bavail >>= 1;
1927 sfs->f_blocks = osfs.os_blocks;
1928 sfs->f_bfree = osfs.os_bfree;
1929 sfs->f_bavail = osfs.os_bavail;
1930 sfs->f_fsid.val[0] = (__u32)fsid;
1931 sfs->f_fsid.val[1] = (__u32)(fsid >> 32);
1935 void ll_inode_size_lock(struct inode *inode)
1937 struct ll_inode_info *lli;
1939 LASSERT(!S_ISDIR(inode->i_mode));
1941 lli = ll_i2info(inode);
1942 mutex_lock(&lli->lli_size_mutex);
1945 void ll_inode_size_unlock(struct inode *inode)
1947 struct ll_inode_info *lli;
1949 lli = ll_i2info(inode);
1950 mutex_unlock(&lli->lli_size_mutex);
1953 void ll_update_inode_flags(struct inode *inode, int ext_flags)
1955 inode->i_flags = ll_ext_to_inode_flags(ext_flags);
1956 if (ext_flags & LUSTRE_PROJINHERIT_FL)
1957 ll_file_set_flag(ll_i2info(inode), LLIF_PROJECT_INHERIT);
1959 ll_file_clear_flag(ll_i2info(inode), LLIF_PROJECT_INHERIT);
1962 int ll_update_inode(struct inode *inode, struct lustre_md *md)
1964 struct ll_inode_info *lli = ll_i2info(inode);
1965 struct mdt_body *body = md->body;
1966 struct ll_sb_info *sbi = ll_i2sbi(inode);
1969 if (body->mbo_valid & OBD_MD_FLEASIZE) {
1970 rc = cl_file_inode_init(inode, md);
1975 if (S_ISDIR(inode->i_mode)) {
1976 rc = ll_update_lsm_md(inode, md);
1981 #ifdef CONFIG_FS_POSIX_ACL
1982 if (body->mbo_valid & OBD_MD_FLACL) {
1983 spin_lock(&lli->lli_lock);
1984 if (lli->lli_posix_acl)
1985 posix_acl_release(lli->lli_posix_acl);
1986 lli->lli_posix_acl = md->posix_acl;
1987 spin_unlock(&lli->lli_lock);
1990 inode->i_ino = cl_fid_build_ino(&body->mbo_fid1,
1991 sbi->ll_flags & LL_SBI_32BIT_API);
1992 inode->i_generation = cl_fid_build_gen(&body->mbo_fid1);
1994 if (body->mbo_valid & OBD_MD_FLATIME) {
1995 if (body->mbo_atime > inode->i_atime.tv_sec)
1996 inode->i_atime.tv_sec = body->mbo_atime;
1997 lli->lli_atime = body->mbo_atime;
2000 if (body->mbo_valid & OBD_MD_FLMTIME) {
2001 if (body->mbo_mtime > inode->i_mtime.tv_sec) {
2003 "setting ino %lu mtime from %lld to %llu\n",
2004 inode->i_ino, (s64)inode->i_mtime.tv_sec,
2006 inode->i_mtime.tv_sec = body->mbo_mtime;
2008 lli->lli_mtime = body->mbo_mtime;
2011 if (body->mbo_valid & OBD_MD_FLCTIME) {
2012 if (body->mbo_ctime > inode->i_ctime.tv_sec)
2013 inode->i_ctime.tv_sec = body->mbo_ctime;
2014 lli->lli_ctime = body->mbo_ctime;
2017 /* Clear i_flags to remove S_NOSEC before permissions are updated */
2018 if (body->mbo_valid & OBD_MD_FLFLAGS)
2019 ll_update_inode_flags(inode, body->mbo_flags);
2020 if (body->mbo_valid & OBD_MD_FLMODE)
2021 inode->i_mode = (inode->i_mode & S_IFMT) |
2022 (body->mbo_mode & ~S_IFMT);
2024 if (body->mbo_valid & OBD_MD_FLTYPE)
2025 inode->i_mode = (inode->i_mode & ~S_IFMT) |
2026 (body->mbo_mode & S_IFMT);
2028 LASSERT(inode->i_mode != 0);
2029 if (S_ISREG(inode->i_mode))
2030 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1,
2031 LL_MAX_BLKSIZE_BITS);
2033 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
2035 if (body->mbo_valid & OBD_MD_FLUID)
2036 inode->i_uid = make_kuid(&init_user_ns, body->mbo_uid);
2037 if (body->mbo_valid & OBD_MD_FLGID)
2038 inode->i_gid = make_kgid(&init_user_ns, body->mbo_gid);
2039 if (body->mbo_valid & OBD_MD_FLPROJID)
2040 lli->lli_projid = body->mbo_projid;
2041 if (body->mbo_valid & OBD_MD_FLNLINK)
2042 set_nlink(inode, body->mbo_nlink);
2043 if (body->mbo_valid & OBD_MD_FLRDEV)
2044 inode->i_rdev = old_decode_dev(body->mbo_rdev);
2046 if (body->mbo_valid & OBD_MD_FLID) {
2047 /* FID shouldn't be changed! */
2048 if (fid_is_sane(&lli->lli_fid)) {
2049 LASSERTF(lu_fid_eq(&lli->lli_fid, &body->mbo_fid1),
2050 "Trying to change FID "DFID
2051 " to the "DFID", inode "DFID"(%p)\n",
2052 PFID(&lli->lli_fid), PFID(&body->mbo_fid1),
2053 PFID(ll_inode2fid(inode)), inode);
2055 lli->lli_fid = body->mbo_fid1;
2059 LASSERT(fid_seq(&lli->lli_fid) != 0);
2061 if (body->mbo_valid & OBD_MD_FLSIZE) {
2062 i_size_write(inode, body->mbo_size);
2064 CDEBUG(D_VFSTRACE, "inode="DFID", updating i_size %llu\n",
2065 PFID(ll_inode2fid(inode)),
2066 (unsigned long long)body->mbo_size);
2068 if (body->mbo_valid & OBD_MD_FLBLOCKS)
2069 inode->i_blocks = body->mbo_blocks;
2072 if (body->mbo_valid & OBD_MD_TSTATE) {
2073 /* Set LLIF_FILE_RESTORING if restore ongoing and
2074 * clear it when done to ensure to start again
2075 * glimpsing updated attrs
2077 if (body->mbo_t_state & MS_RESTORE)
2078 ll_file_set_flag(lli, LLIF_FILE_RESTORING);
2080 ll_file_clear_flag(lli, LLIF_FILE_RESTORING);
2086 int ll_read_inode2(struct inode *inode, void *opaque)
2088 struct lustre_md *md = opaque;
2089 struct ll_inode_info *lli = ll_i2info(inode);
2093 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
2094 PFID(&lli->lli_fid), inode);
2096 /* Core attributes from the MDS first. This is a new inode, and
2097 * the VFS doesn't zero times in the core inode so we have to do
2098 * it ourselves. They will be overwritten by either MDS or OST
2099 * attributes - we just need to make sure they aren't newer.
2101 inode->i_mtime.tv_sec = 0;
2102 inode->i_atime.tv_sec = 0;
2103 inode->i_ctime.tv_sec = 0;
2105 rc = ll_update_inode(inode, md);
2109 /* OIDEBUG(inode); */
2111 #ifdef HAVE_BACKING_DEV_INFO
2112 /* initializing backing dev info. */
2113 inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
2115 if (S_ISREG(inode->i_mode)) {
2116 struct ll_sb_info *sbi = ll_i2sbi(inode);
2117 inode->i_op = &ll_file_inode_operations;
2118 inode->i_fop = sbi->ll_fop;
2119 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
2121 } else if (S_ISDIR(inode->i_mode)) {
2122 inode->i_op = &ll_dir_inode_operations;
2123 inode->i_fop = &ll_dir_operations;
2125 } else if (S_ISLNK(inode->i_mode)) {
2126 inode->i_op = &ll_fast_symlink_inode_operations;
2129 inode->i_op = &ll_special_inode_operations;
2131 init_special_inode(inode, inode->i_mode,
2140 void ll_delete_inode(struct inode *inode)
2142 struct ll_inode_info *lli = ll_i2info(inode);
2143 struct address_space *mapping = &inode->i_data;
2144 unsigned long nrpages;
2147 if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL) {
2148 /* It is last chance to write out dirty pages,
2149 * otherwise we may lose data while umount.
2151 * If i_nlink is 0 then just discard data. This is safe because
2152 * local inode gets i_nlink 0 from server only for the last
2153 * unlink, so that file is not opened somewhere else
2155 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF, inode->i_nlink ?
2156 CL_FSYNC_LOCAL : CL_FSYNC_DISCARD, 1);
2158 truncate_inode_pages_final(mapping);
2160 /* Workaround for LU-118: Note nrpages may not be totally updated when
2161 * truncate_inode_pages() returns, as there can be a page in the process
2162 * of deletion (inside __delete_from_page_cache()) in the specified
2163 * range. Thus mapping->nrpages can be non-zero when this function
2164 * returns even after truncation of the whole mapping. Only do this if
2165 * npages isn't already zero.
2167 nrpages = mapping->nrpages;
2169 xa_lock_irq(&mapping->i_pages);
2170 nrpages = mapping->nrpages;
2171 xa_unlock_irq(&mapping->i_pages);
2172 } /* Workaround end */
2174 LASSERTF(nrpages == 0, "%s: inode="DFID"(%p) nrpages=%lu, "
2175 "see https://jira.whamcloud.com/browse/LU-118\n",
2176 ll_i2sbi(inode)->ll_fsname,
2177 PFID(ll_inode2fid(inode)), inode, nrpages);
2179 #ifdef HAVE_SBOPS_EVICT_INODE
2180 ll_clear_inode(inode);
2187 int ll_iocontrol(struct inode *inode, struct file *file,
2188 unsigned int cmd, unsigned long arg)
2190 struct ll_sb_info *sbi = ll_i2sbi(inode);
2191 struct ptlrpc_request *req = NULL;
2196 case FS_IOC_GETFLAGS: {
2197 struct mdt_body *body;
2198 struct md_op_data *op_data;
2200 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
2201 0, 0, LUSTRE_OPC_ANY,
2203 if (IS_ERR(op_data))
2204 RETURN(PTR_ERR(op_data));
2206 op_data->op_valid = OBD_MD_FLFLAGS;
2207 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
2208 ll_finish_md_op_data(op_data);
2210 CERROR("%s: failure inode "DFID": rc = %d\n",
2211 sbi->ll_md_exp->exp_obd->obd_name,
2212 PFID(ll_inode2fid(inode)), rc);
2216 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
2218 flags = body->mbo_flags;
2220 ptlrpc_req_finished(req);
2222 RETURN(put_user(flags, (int __user *)arg));
2224 case FS_IOC_SETFLAGS: {
2226 struct md_op_data *op_data;
2227 struct cl_object *obj;
2228 struct fsxattr fa = { 0 };
2230 if (get_user(flags, (int __user *)arg))
2233 fa.fsx_projid = ll_i2info(inode)->lli_projid;
2234 if (flags & LUSTRE_PROJINHERIT_FL)
2235 fa.fsx_xflags = FS_XFLAG_PROJINHERIT;
2237 rc = ll_ioctl_check_project(inode, &fa);
2241 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
2242 LUSTRE_OPC_ANY, NULL);
2243 if (IS_ERR(op_data))
2244 RETURN(PTR_ERR(op_data));
2246 op_data->op_attr_flags = flags;
2247 op_data->op_xvalid |= OP_XVALID_FLAGS;
2248 rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &req);
2249 ll_finish_md_op_data(op_data);
2250 ptlrpc_req_finished(req);
2254 ll_update_inode_flags(inode, flags);
2256 obj = ll_i2info(inode)->lli_clob;
2260 OBD_ALLOC_PTR(attr);
2264 rc = cl_setattr_ost(obj, attr, OP_XVALID_FLAGS, flags);
2276 int ll_flush_ctx(struct inode *inode)
2278 struct ll_sb_info *sbi = ll_i2sbi(inode);
2280 CDEBUG(D_SEC, "flush context for user %d\n",
2281 from_kuid(&init_user_ns, current_uid()));
2283 obd_set_info_async(NULL, sbi->ll_md_exp,
2284 sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2286 obd_set_info_async(NULL, sbi->ll_dt_exp,
2287 sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2292 /* umount -f client means force down, don't save state */
2293 void ll_umount_begin(struct super_block *sb)
2295 struct ll_sb_info *sbi = ll_s2sbi(sb);
2296 struct obd_device *obd;
2297 struct obd_ioctl_data *ioc_data;
2298 struct l_wait_info lwi;
2299 wait_queue_head_t waitq;
2302 CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2303 sb->s_count, atomic_read(&sb->s_active));
2305 obd = class_exp2obd(sbi->ll_md_exp);
2307 CERROR("Invalid MDC connection handle %#llx\n",
2308 sbi->ll_md_exp->exp_handle.h_cookie);
2314 obd = class_exp2obd(sbi->ll_dt_exp);
2316 CERROR("Invalid LOV connection handle %#llx\n",
2317 sbi->ll_dt_exp->exp_handle.h_cookie);
2323 OBD_ALLOC_PTR(ioc_data);
2325 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2326 sizeof *ioc_data, ioc_data, NULL);
2328 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2329 sizeof *ioc_data, ioc_data, NULL);
2331 OBD_FREE_PTR(ioc_data);
2334 /* Really, we'd like to wait until there are no requests outstanding,
2335 * and then continue. For now, we just periodically checking for vfs
2336 * to decrement mnt_cnt and hope to finish it within 10sec.
2338 init_waitqueue_head(&waitq);
2339 lwi = LWI_TIMEOUT_INTERVAL(cfs_time_seconds(10),
2340 cfs_time_seconds(1), NULL, NULL);
2341 l_wait_event(waitq, may_umount(sbi->ll_mnt.mnt), &lwi);
2346 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2348 struct ll_sb_info *sbi = ll_s2sbi(sb);
2349 char *profilenm = get_profile_name(sb);
2353 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2354 read_only = *flags & MS_RDONLY;
2355 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2356 sizeof(KEY_READ_ONLY),
2357 KEY_READ_ONLY, sizeof(read_only),
2360 LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2361 profilenm, read_only ?
2362 "read-only" : "read-write", err);
2367 sb->s_flags |= MS_RDONLY;
2369 sb->s_flags &= ~MS_RDONLY;
2371 if (sbi->ll_flags & LL_SBI_VERBOSE)
2372 LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2373 read_only ? "read-only" : "read-write");
2379 * Cleanup the open handle that is cached on MDT-side.
2381 * For open case, the client side open handling thread may hit error
2382 * after the MDT grant the open. Under such case, the client should
2383 * send close RPC to the MDT as cleanup; otherwise, the open handle
2384 * on the MDT will be leaked there until the client umount or evicted.
2386 * In further, if someone unlinked the file, because the open handle
2387 * holds the reference on such file/object, then it will block the
2388 * subsequent threads that want to locate such object via FID.
2390 * \param[in] sb super block for this file-system
2391 * \param[in] open_req pointer to the original open request
2393 void ll_open_cleanup(struct super_block *sb, struct ptlrpc_request *open_req)
2395 struct mdt_body *body;
2396 struct md_op_data *op_data;
2397 struct ptlrpc_request *close_req = NULL;
2398 struct obd_export *exp = ll_s2sbi(sb)->ll_md_exp;
2401 body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
2402 OBD_ALLOC_PTR(op_data);
2403 if (op_data == NULL) {
2404 CWARN("%s: cannot allocate op_data to release open handle for "
2405 DFID"\n", ll_s2sbi(sb)->ll_fsname, PFID(&body->mbo_fid1));
2410 op_data->op_fid1 = body->mbo_fid1;
2411 op_data->op_open_handle = body->mbo_open_handle;
2412 op_data->op_mod_time = ktime_get_real_seconds();
2413 md_close(exp, op_data, NULL, &close_req);
2414 ptlrpc_req_finished(close_req);
2415 ll_finish_md_op_data(op_data);
2420 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2421 struct super_block *sb, struct lookup_intent *it)
2423 struct ll_sb_info *sbi = NULL;
2424 struct lustre_md md = { NULL };
2428 LASSERT(*inode || sb);
2429 sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2430 rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2431 sbi->ll_md_exp, &md);
2436 rc = ll_update_inode(*inode, &md);
2440 LASSERT(sb != NULL);
2443 * At this point server returns to client's same fid as client
2444 * generated for creating. So using ->fid1 is okay here.
2446 if (!fid_is_sane(&md.body->mbo_fid1)) {
2447 CERROR("%s: Fid is insane "DFID"\n",
2449 PFID(&md.body->mbo_fid1));
2450 GOTO(out, rc = -EINVAL);
2453 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->mbo_fid1,
2454 sbi->ll_flags & LL_SBI_32BIT_API),
2456 if (IS_ERR(*inode)) {
2457 #ifdef CONFIG_FS_POSIX_ACL
2459 posix_acl_release(md.posix_acl);
2460 md.posix_acl = NULL;
2463 rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2465 CERROR("new_inode -fatal: rc %d\n", rc);
2470 /* Handling piggyback layout lock.
2471 * Layout lock can be piggybacked by getattr and open request.
2472 * The lsm can be applied to inode only if it comes with a layout lock
2473 * otherwise correct layout may be overwritten, for example:
2474 * 1. proc1: mdt returns a lsm but not granting layout
2475 * 2. layout was changed by another client
2476 * 3. proc2: refresh layout and layout lock granted
2477 * 4. proc1: to apply a stale layout */
2478 if (it != NULL && it->it_lock_mode != 0) {
2479 struct lustre_handle lockh;
2480 struct ldlm_lock *lock;
2482 lockh.cookie = it->it_lock_handle;
2483 lock = ldlm_handle2lock(&lockh);
2484 LASSERT(lock != NULL);
2485 if (ldlm_has_layout(lock)) {
2486 struct cl_object_conf conf;
2488 memset(&conf, 0, sizeof(conf));
2489 conf.coc_opc = OBJECT_CONF_SET;
2490 conf.coc_inode = *inode;
2491 conf.coc_lock = lock;
2492 conf.u.coc_layout = md.layout;
2493 (void)ll_layout_conf(*inode, &conf);
2495 LDLM_LOCK_PUT(lock);
2501 /* cleanup will be done if necessary */
2502 md_free_lustre_md(sbi->ll_md_exp, &md);
2504 if (rc != 0 && it != NULL && it->it_op & IT_OPEN)
2505 ll_open_cleanup(sb != NULL ? sb : (*inode)->i_sb, req);
2510 int ll_obd_statfs(struct inode *inode, void __user *arg)
2512 struct ll_sb_info *sbi = NULL;
2513 struct obd_export *exp;
2515 struct obd_ioctl_data *data = NULL;
2519 if (!inode || !(sbi = ll_i2sbi(inode)))
2520 GOTO(out_statfs, rc = -EINVAL);
2522 rc = obd_ioctl_getdata(&buf, &len, arg);
2524 GOTO(out_statfs, rc);
2527 if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2528 !data->ioc_pbuf1 || !data->ioc_pbuf2)
2529 GOTO(out_statfs, rc = -EINVAL);
2531 if (data->ioc_inllen1 != sizeof(__u32) ||
2532 data->ioc_inllen2 != sizeof(__u32) ||
2533 data->ioc_plen1 != sizeof(struct obd_statfs) ||
2534 data->ioc_plen2 != sizeof(struct obd_uuid))
2535 GOTO(out_statfs, rc = -EINVAL);
2537 memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2538 if (type & LL_STATFS_LMV)
2539 exp = sbi->ll_md_exp;
2540 else if (type & LL_STATFS_LOV)
2541 exp = sbi->ll_dt_exp;
2543 GOTO(out_statfs, rc = -ENODEV);
2545 rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, NULL);
2547 GOTO(out_statfs, rc);
2549 OBD_FREE_LARGE(buf, len);
2554 * this is normally called in ll_fini_md_op_data(), but sometimes it needs to
2555 * be called early to avoid deadlock.
2557 void ll_unlock_md_op_lsm(struct md_op_data *op_data)
2559 if (op_data->op_mea2_sem) {
2560 up_read(op_data->op_mea2_sem);
2561 op_data->op_mea2_sem = NULL;
2564 if (op_data->op_mea1_sem) {
2565 up_read(op_data->op_mea1_sem);
2566 op_data->op_mea1_sem = NULL;
2570 /* this function prepares md_op_data hint for passing it down to MD stack. */
2571 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
2572 struct inode *i1, struct inode *i2,
2573 const char *name, size_t namelen,
2574 __u32 mode, __u32 opc, void *data)
2576 LASSERT(i1 != NULL);
2579 /* Do not reuse namelen for something else. */
2581 return ERR_PTR(-EINVAL);
2583 if (namelen > ll_i2sbi(i1)->ll_namelen)
2584 return ERR_PTR(-ENAMETOOLONG);
2586 if (!lu_name_is_valid_2(name, namelen))
2587 return ERR_PTR(-EINVAL);
2590 if (op_data == NULL)
2591 OBD_ALLOC_PTR(op_data);
2593 if (op_data == NULL)
2594 return ERR_PTR(-ENOMEM);
2596 ll_i2gids(op_data->op_suppgids, i1, i2);
2597 op_data->op_fid1 = *ll_inode2fid(i1);
2598 op_data->op_default_stripe_offset = -1;
2600 if (S_ISDIR(i1->i_mode)) {
2601 down_read(&ll_i2info(i1)->lli_lsm_sem);
2602 op_data->op_mea1_sem = &ll_i2info(i1)->lli_lsm_sem;
2603 op_data->op_mea1 = ll_i2info(i1)->lli_lsm_md;
2604 if (opc == LUSTRE_OPC_MKDIR)
2605 op_data->op_default_stripe_offset =
2606 ll_i2info(i1)->lli_def_stripe_offset;
2610 op_data->op_fid2 = *ll_inode2fid(i2);
2611 if (S_ISDIR(i2->i_mode)) {
2613 down_read(&ll_i2info(i2)->lli_lsm_sem);
2614 op_data->op_mea2_sem =
2615 &ll_i2info(i2)->lli_lsm_sem;
2617 op_data->op_mea2 = ll_i2info(i2)->lli_lsm_md;
2620 fid_zero(&op_data->op_fid2);
2623 if (ll_i2sbi(i1)->ll_flags & LL_SBI_64BIT_HASH)
2624 op_data->op_cli_flags |= CLI_HASH64;
2626 if (ll_need_32bit_api(ll_i2sbi(i1)))
2627 op_data->op_cli_flags |= CLI_API32;
2629 op_data->op_name = name;
2630 op_data->op_namelen = namelen;
2631 op_data->op_mode = mode;
2632 op_data->op_mod_time = ktime_get_real_seconds();
2633 op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2634 op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2635 op_data->op_cap = cfs_curproc_cap_pack();
2636 op_data->op_mds = 0;
2637 if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2638 filename_is_volatile(name, namelen, &op_data->op_mds)) {
2639 op_data->op_bias |= MDS_CREATE_VOLATILE;
2641 op_data->op_data = data;
2646 void ll_finish_md_op_data(struct md_op_data *op_data)
2648 ll_unlock_md_op_lsm(op_data);
2649 security_release_secctx(op_data->op_file_secctx,
2650 op_data->op_file_secctx_size);
2651 OBD_FREE_PTR(op_data);
2654 #ifdef HAVE_SUPEROPS_USE_DENTRY
2655 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2657 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
2660 struct ll_sb_info *sbi;
2662 #ifdef HAVE_SUPEROPS_USE_DENTRY
2663 LASSERT((seq != NULL) && (dentry != NULL));
2664 sbi = ll_s2sbi(dentry->d_sb);
2666 LASSERT((seq != NULL) && (vfs != NULL));
2667 sbi = ll_s2sbi(vfs->mnt_sb);
2670 if (sbi->ll_flags & LL_SBI_NOLCK)
2671 seq_puts(seq, ",nolock");
2673 if (sbi->ll_flags & LL_SBI_FLOCK)
2674 seq_puts(seq, ",flock");
2676 if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2677 seq_puts(seq, ",localflock");
2679 if (sbi->ll_flags & LL_SBI_USER_XATTR)
2680 seq_puts(seq, ",user_xattr");
2682 if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2683 seq_puts(seq, ",lazystatfs");
2685 if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2686 seq_puts(seq, ",user_fid2path");
2688 if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
2689 seq_puts(seq, ",always_ping");
2695 * Get obd name by cmd, and copy out to user space
2697 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2699 struct ll_sb_info *sbi = ll_i2sbi(inode);
2700 struct obd_device *obd;
2703 if (cmd == OBD_IOC_GETDTNAME)
2704 obd = class_exp2obd(sbi->ll_dt_exp);
2705 else if (cmd == OBD_IOC_GETMDNAME)
2706 obd = class_exp2obd(sbi->ll_md_exp);
2713 if (copy_to_user((void __user *)arg, obd->obd_name,
2714 strlen(obd->obd_name) + 1))
2720 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
2727 p.mnt = current->fs->root.mnt;
2729 path = d_path(&p, buf, bufsize);
2734 void ll_dirty_page_discard_warn(struct page *page, int ioret)
2736 char *buf, *path = NULL;
2737 struct dentry *dentry = NULL;
2738 struct inode *inode = page->mapping->host;
2740 /* this can be called inside spin lock so use GFP_ATOMIC. */
2741 buf = (char *)__get_free_page(GFP_ATOMIC);
2743 dentry = d_find_alias(page->mapping->host);
2745 path = ll_d_path(dentry, buf, PAGE_SIZE);
2749 "%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
2750 "(rc %d)\n", ll_i2sbi(inode)->ll_fsname,
2751 s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2752 PFID(ll_inode2fid(inode)),
2753 (path && !IS_ERR(path)) ? path : "", ioret);
2759 free_page((unsigned long)buf);
2762 ssize_t ll_copy_user_md(const struct lov_user_md __user *md,
2763 struct lov_user_md **kbuf)
2765 struct lov_user_md lum;
2769 if (copy_from_user(&lum, md, sizeof(lum)))
2772 lum_size = ll_lov_user_md_size(&lum);
2776 OBD_ALLOC(*kbuf, lum_size);
2780 if (copy_from_user(*kbuf, md, lum_size) != 0) {
2781 OBD_FREE(*kbuf, lum_size);
2789 * Compute llite root squash state after a change of root squash
2790 * configuration setting or add/remove of a lnet nid
2792 void ll_compute_rootsquash_state(struct ll_sb_info *sbi)
2794 struct root_squash_info *squash = &sbi->ll_squash;
2797 struct lnet_process_id id;
2799 /* Update norootsquash flag */
2800 down_write(&squash->rsi_sem);
2801 if (list_empty(&squash->rsi_nosquash_nids))
2802 sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2804 /* Do not apply root squash as soon as one of our NIDs is
2805 * in the nosquash_nids list */
2808 while (LNetGetId(i++, &id) != -ENOENT) {
2809 if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
2811 if (cfs_match_nid(id.nid, &squash->rsi_nosquash_nids)) {
2817 sbi->ll_flags |= LL_SBI_NOROOTSQUASH;
2819 sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2821 up_write(&squash->rsi_sem);
2825 * Parse linkea content to extract information about a given hardlink
2827 * \param[in] ldata - Initialized linkea data
2828 * \param[in] linkno - Link identifier
2829 * \param[out] parent_fid - The entry's parent FID
2830 * \param[out] ln - Entry name destination buffer
2832 * \retval 0 on success
2833 * \retval Appropriate negative error code on failure
2835 static int ll_linkea_decode(struct linkea_data *ldata, unsigned int linkno,
2836 struct lu_fid *parent_fid, struct lu_name *ln)
2842 rc = linkea_init_with_rec(ldata);
2846 if (linkno >= ldata->ld_leh->leh_reccount)
2847 /* beyond last link */
2850 linkea_first_entry(ldata);
2851 for (idx = 0; ldata->ld_lee != NULL; idx++) {
2852 linkea_entry_unpack(ldata->ld_lee, &ldata->ld_reclen, ln,
2857 linkea_next_entry(ldata);
2867 * Get parent FID and name of an identified link. Operation is performed for
2868 * a given link number, letting the caller iterate over linkno to list one or
2869 * all links of an entry.
2871 * \param[in] file - File descriptor against which to perform the operation
2872 * \param[in,out] arg - User-filled structure containing the linkno to operate
2873 * on and the available size. It is eventually filled with
2874 * the requested information or left untouched on error
2876 * \retval - 0 on success
2877 * \retval - Appropriate negative error code on failure
2879 int ll_getparent(struct file *file, struct getparent __user *arg)
2881 struct inode *inode = file_inode(file);
2882 struct linkea_data *ldata;
2883 struct lu_buf buf = LU_BUF_NULL;
2885 struct lu_fid parent_fid;
2892 if (!cfs_capable(CFS_CAP_DAC_READ_SEARCH) &&
2893 !(ll_i2sbi(inode)->ll_flags & LL_SBI_USER_FID2PATH))
2896 if (get_user(name_size, &arg->gp_name_size))
2899 if (get_user(linkno, &arg->gp_linkno))
2902 if (name_size > PATH_MAX)
2905 OBD_ALLOC(ldata, sizeof(*ldata));
2909 rc = linkea_data_new(ldata, &buf);
2911 GOTO(ldata_free, rc);
2913 #ifdef HAVE_XATTR_HANDLER_FLAGS
2914 rc = ll_xattr_list(inode, XATTR_NAME_LINK, XATTR_TRUSTED_T, buf.lb_buf,
2915 buf.lb_len, OBD_MD_FLXATTR);
2917 rc = ll_getxattr(file_dentry(file), XATTR_NAME_LINK, buf.lb_buf,
2919 #endif /* HAVE_XATTR_HANDLER_FLAGS */
2923 rc = ll_linkea_decode(ldata, linkno, &parent_fid, &ln);
2927 if (ln.ln_namelen >= name_size)
2928 GOTO(lb_free, rc = -EOVERFLOW);
2930 if (copy_to_user(&arg->gp_fid, &parent_fid, sizeof(arg->gp_fid)))
2931 GOTO(lb_free, rc = -EFAULT);
2933 if (copy_to_user(&arg->gp_name, ln.ln_name, ln.ln_namelen))
2934 GOTO(lb_free, rc = -EFAULT);
2936 if (put_user('\0', arg->gp_name + ln.ln_namelen))
2937 GOTO(lb_free, rc = -EFAULT);
2942 OBD_FREE(ldata, sizeof(*ldata));