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/
31 * lustre/llite/llite_lib.c
33 * Lustre Light Super operations
36 #define DEBUG_SUBSYSTEM S_LLITE
38 #include <linux/cpu.h>
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 #include <linux/delay.h>
49 #include <linux/uidgid.h>
50 #include <linux/fs_struct.h>
52 #ifndef HAVE_CPUS_READ_LOCK
53 #include <libcfs/linux/linux-cpu.h>
55 #include <uapi/linux/lustre/lustre_ioctl.h>
56 #ifdef HAVE_UAPI_LINUX_MOUNT_H
57 #include <uapi/linux/mount.h>
60 #include <lustre_ha.h>
61 #include <lustre_dlm.h>
62 #include <lprocfs_status.h>
63 #include <lustre_disk.h>
64 #include <uapi/linux/lustre/lustre_param.h>
65 #include <lustre_log.h>
66 #include <cl_object.h>
67 #include <obd_cksum.h>
68 #include "llite_internal.h"
70 struct kmem_cache *ll_file_data_slab;
73 #define log2(n) ffz(~(n))
77 * If there is only one number of core visible to Lustre,
78 * async readahead will be disabled, to avoid massive over
79 * subscription, we use 1/2 of active cores as default max
80 * async readahead requests.
82 static inline unsigned int ll_get_ra_async_max_active(void)
84 return cfs_cpt_weight(cfs_cpt_tab, CFS_CPT_ANY) >> 1;
87 static struct ll_sb_info *ll_init_sbi(void)
89 struct ll_sb_info *sbi = NULL;
91 unsigned long lru_page_max;
100 RETURN(ERR_PTR(-ENOMEM));
102 rc = pcc_super_init(&sbi->ll_pcc_super);
106 spin_lock_init(&sbi->ll_lock);
107 mutex_init(&sbi->ll_lco.lco_lock);
108 spin_lock_init(&sbi->ll_pp_extent_lock);
109 spin_lock_init(&sbi->ll_process_lock);
110 sbi->ll_rw_stats_on = 0;
111 sbi->ll_statfs_max_age = OBD_STATFS_CACHE_SECONDS;
114 pages = si.totalram - si.totalhigh;
115 lru_page_max = pages / 2;
117 sbi->ll_ra_info.ra_async_max_active = ll_get_ra_async_max_active();
118 sbi->ll_ra_info.ll_readahead_wq =
119 cfs_cpt_bind_workqueue("ll-readahead-wq", cfs_cpt_tab,
121 sbi->ll_ra_info.ra_async_max_active);
122 if (IS_ERR(sbi->ll_ra_info.ll_readahead_wq))
123 GOTO(out_pcc, rc = PTR_ERR(sbi->ll_ra_info.ll_readahead_wq));
125 /* initialize ll_cache data */
126 sbi->ll_cache = cl_cache_init(lru_page_max);
127 if (sbi->ll_cache == NULL)
128 GOTO(out_destroy_ra, rc = -ENOMEM);
130 /* initialize foreign symlink prefix path */
131 OBD_ALLOC(sbi->ll_foreign_symlink_prefix, sizeof("/mnt/"));
132 if (sbi->ll_foreign_symlink_prefix == NULL)
133 GOTO(out_destroy_ra, rc = -ENOMEM);
134 memcpy(sbi->ll_foreign_symlink_prefix, "/mnt/", sizeof("/mnt/"));
135 sbi->ll_foreign_symlink_prefix_size = sizeof("/mnt/");
137 /* initialize foreign symlink upcall path, none by default */
138 OBD_ALLOC(sbi->ll_foreign_symlink_upcall, sizeof("none"));
139 if (sbi->ll_foreign_symlink_upcall == NULL)
140 GOTO(out_destroy_ra, rc = -ENOMEM);
141 memcpy(sbi->ll_foreign_symlink_upcall, "none", sizeof("none"));
142 sbi->ll_foreign_symlink_upcall_items = NULL;
143 sbi->ll_foreign_symlink_upcall_nb_items = 0;
144 init_rwsem(&sbi->ll_foreign_symlink_sem);
145 /* foreign symlink support (LL_SBI_FOREIGN_SYMLINK in ll_flags)
146 * not enabled by default
149 sbi->ll_ra_info.ra_max_pages =
150 min(pages / 32, SBI_DEFAULT_READ_AHEAD_MAX);
151 sbi->ll_ra_info.ra_max_pages_per_file =
152 min(sbi->ll_ra_info.ra_max_pages / 4,
153 SBI_DEFAULT_READ_AHEAD_PER_FILE_MAX);
154 sbi->ll_ra_info.ra_async_pages_per_file_threshold =
155 sbi->ll_ra_info.ra_max_pages_per_file;
156 sbi->ll_ra_info.ra_range_pages = SBI_DEFAULT_RA_RANGE_PAGES;
157 sbi->ll_ra_info.ra_max_read_ahead_whole_pages = -1;
158 atomic_set(&sbi->ll_ra_info.ra_async_inflight, 0);
160 sbi->ll_flags |= LL_SBI_VERBOSE;
161 #ifdef ENABLE_CHECKSUM
162 sbi->ll_flags |= LL_SBI_CHECKSUM;
165 sbi->ll_flags |= LL_SBI_FLOCK;
168 #ifdef HAVE_LRU_RESIZE_SUPPORT
169 sbi->ll_flags |= LL_SBI_LRU_RESIZE;
171 sbi->ll_flags |= LL_SBI_LAZYSTATFS;
173 for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
174 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
176 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
180 /* metadata statahead is enabled by default */
181 sbi->ll_sa_running_max = LL_SA_RUNNING_DEF;
182 sbi->ll_sa_max = LL_SA_RPC_DEF;
183 atomic_set(&sbi->ll_sa_total, 0);
184 atomic_set(&sbi->ll_sa_wrong, 0);
185 atomic_set(&sbi->ll_sa_running, 0);
186 atomic_set(&sbi->ll_agl_total, 0);
187 sbi->ll_flags |= LL_SBI_AGL_ENABLED;
188 sbi->ll_flags |= LL_SBI_FAST_READ;
189 sbi->ll_flags |= LL_SBI_TINY_WRITE;
190 sbi->ll_flags |= LL_SBI_PARALLEL_DIO;
191 ll_sbi_set_encrypt(sbi, true);
194 sbi->ll_squash.rsi_uid = 0;
195 sbi->ll_squash.rsi_gid = 0;
196 INIT_LIST_HEAD(&sbi->ll_squash.rsi_nosquash_nids);
197 spin_lock_init(&sbi->ll_squash.rsi_lock);
199 /* Per-filesystem file heat */
200 sbi->ll_heat_decay_weight = SBI_DEFAULT_HEAT_DECAY_WEIGHT;
201 sbi->ll_heat_period_second = SBI_DEFAULT_HEAT_PERIOD_SECOND;
203 /* Per-fs open heat level before requesting open lock */
204 sbi->ll_oc_thrsh_count = SBI_DEFAULT_OPENCACHE_THRESHOLD_COUNT;
205 sbi->ll_oc_max_ms = SBI_DEFAULT_OPENCACHE_THRESHOLD_MAX_MS;
206 sbi->ll_oc_thrsh_ms = SBI_DEFAULT_OPENCACHE_THRESHOLD_MS;
209 if (sbi->ll_foreign_symlink_prefix)
210 OBD_FREE(sbi->ll_foreign_symlink_prefix, sizeof("/mnt/"));
212 cl_cache_decref(sbi->ll_cache);
213 sbi->ll_cache = NULL;
215 destroy_workqueue(sbi->ll_ra_info.ll_readahead_wq);
217 pcc_super_fini(&sbi->ll_pcc_super);
223 static void ll_free_sbi(struct super_block *sb)
225 struct ll_sb_info *sbi = ll_s2sbi(sb);
229 if (!list_empty(&sbi->ll_squash.rsi_nosquash_nids))
230 cfs_free_nidlist(&sbi->ll_squash.rsi_nosquash_nids);
231 if (sbi->ll_ra_info.ll_readahead_wq)
232 destroy_workqueue(sbi->ll_ra_info.ll_readahead_wq);
233 if (sbi->ll_cache != NULL) {
234 cl_cache_decref(sbi->ll_cache);
235 sbi->ll_cache = NULL;
237 if (sbi->ll_foreign_symlink_prefix) {
238 OBD_FREE(sbi->ll_foreign_symlink_prefix,
239 sbi->ll_foreign_symlink_prefix_size);
240 sbi->ll_foreign_symlink_prefix = NULL;
242 if (sbi->ll_foreign_symlink_upcall) {
243 OBD_FREE(sbi->ll_foreign_symlink_upcall,
244 strlen(sbi->ll_foreign_symlink_upcall) +
246 sbi->ll_foreign_symlink_upcall = NULL;
248 if (sbi->ll_foreign_symlink_upcall_items) {
250 int nb_items = sbi->ll_foreign_symlink_upcall_nb_items;
251 struct ll_foreign_symlink_upcall_item *items =
252 sbi->ll_foreign_symlink_upcall_items;
254 for (i = 0 ; i < nb_items; i++)
255 if (items[i].type == STRING_TYPE)
256 OBD_FREE(items[i].string,
259 OBD_FREE_LARGE(items, nb_items *
260 sizeof(struct ll_foreign_symlink_upcall_item));
261 sbi->ll_foreign_symlink_upcall_items = NULL;
263 pcc_super_fini(&sbi->ll_pcc_super);
264 OBD_FREE(sbi, sizeof(*sbi));
269 static int client_common_fill_super(struct super_block *sb, char *md, char *dt)
271 struct inode *root = NULL;
272 struct ll_sb_info *sbi = ll_s2sbi(sb);
273 struct obd_statfs *osfs = NULL;
274 struct ptlrpc_request *request = NULL;
275 struct obd_connect_data *data = NULL;
276 struct obd_uuid *uuid;
277 struct md_op_data *op_data;
278 struct lustre_md lmd;
280 int size, err, checksum;
283 sbi->ll_md_obd = class_name2obd(md);
284 if (!sbi->ll_md_obd) {
285 CERROR("MD %s: not setup or attached\n", md);
299 /* pass client page size via ocd_grant_blkbits, the server should report
300 * back its backend blocksize for grant calculation purpose */
301 data->ocd_grant_blkbits = PAGE_SHIFT;
303 /* indicate MDT features supported by this client */
304 data->ocd_connect_flags = OBD_CONNECT_IBITS | OBD_CONNECT_NODEVOH |
305 OBD_CONNECT_ATTRFID | OBD_CONNECT_GRANT |
306 OBD_CONNECT_VERSION | OBD_CONNECT_BRW_SIZE |
307 OBD_CONNECT_SRVLOCK |
308 OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
309 OBD_CONNECT_CANCELSET | OBD_CONNECT_FID |
310 OBD_CONNECT_AT | OBD_CONNECT_LOV_V3 |
311 OBD_CONNECT_VBR | OBD_CONNECT_FULL20 |
312 OBD_CONNECT_64BITHASH |
313 OBD_CONNECT_EINPROGRESS |
314 OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
315 OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS|
316 OBD_CONNECT_MAX_EASIZE |
317 OBD_CONNECT_FLOCK_DEAD |
318 OBD_CONNECT_DISP_STRIPE | OBD_CONNECT_LFSCK |
319 OBD_CONNECT_OPEN_BY_FID |
320 OBD_CONNECT_DIR_STRIPE |
321 OBD_CONNECT_BULK_MBITS | OBD_CONNECT_CKSUM |
322 OBD_CONNECT_SUBTREE |
323 OBD_CONNECT_MULTIMODRPCS |
324 OBD_CONNECT_GRANT_PARAM |
325 OBD_CONNECT_SHORTIO | OBD_CONNECT_FLAGS2;
327 data->ocd_connect_flags2 = OBD_CONNECT2_DIR_MIGRATE |
328 OBD_CONNECT2_SUM_STATFS |
329 OBD_CONNECT2_OVERSTRIPING |
331 OBD_CONNECT2_LOCK_CONVERT |
332 OBD_CONNECT2_ARCHIVE_ID_ARRAY |
333 OBD_CONNECT2_INC_XID |
335 OBD_CONNECT2_ASYNC_DISCARD |
337 OBD_CONNECT2_CRUSH | OBD_CONNECT2_LSEEK |
338 OBD_CONNECT2_GETATTR_PFID |
339 OBD_CONNECT2_DOM_LVB |
340 OBD_CONNECT2_REP_MBITS |
341 OBD_CONNECT2_ATOMIC_OPEN_LOCK;
343 #ifdef HAVE_LRU_RESIZE_SUPPORT
344 if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
345 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
347 data->ocd_connect_flags |= OBD_CONNECT_ACL_FLAGS;
349 data->ocd_cksum_types = obd_cksum_types_supported_client();
351 if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
352 /* flag mdc connection as lightweight, only used for test
353 * purpose, use with care */
354 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
356 data->ocd_ibits_known = MDS_INODELOCK_FULL;
357 data->ocd_version = LUSTRE_VERSION_CODE;
359 if (sb->s_flags & SB_RDONLY)
360 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
361 if (sbi->ll_flags & LL_SBI_USER_XATTR)
362 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
365 /* Setting this indicates we correctly support S_NOSEC (See kernel
366 * commit 9e1f1de02c2275d7172e18dc4e7c2065777611bf)
368 sb->s_flags |= SB_NOSEC;
370 sbi->ll_fop = ll_select_file_operations(sbi);
372 /* always ping even if server suppress_pings */
373 if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
374 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
376 obd_connect_set_secctx(data);
377 if (ll_sbi_has_encrypt(sbi))
378 obd_connect_set_enc(data);
380 #if defined(CONFIG_SECURITY)
381 data->ocd_connect_flags2 |= OBD_CONNECT2_SELINUX_POLICY;
384 data->ocd_brw_size = MD_MAX_BRW_SIZE;
386 err = obd_connect(NULL, &sbi->ll_md_exp, sbi->ll_md_obd,
387 &sbi->ll_sb_uuid, data, sbi->ll_cache);
389 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
390 "recovery, of which this client is not a "
391 "part. Please wait for recovery to complete,"
392 " abort, or time out.\n", md);
395 CERROR("cannot connect to %s: rc = %d\n", md, err);
399 sbi->ll_md_exp->exp_connect_data = *data;
401 err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
402 LUSTRE_SEQ_METADATA);
404 CERROR("%s: Can't init metadata layer FID infrastructure, "
405 "rc = %d\n", sbi->ll_md_exp->exp_obd->obd_name, err);
409 /* For mount, we only need fs info from MDT0, and also in DNE, it
410 * can make sure the client can be mounted as long as MDT0 is
412 err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
413 ktime_get_seconds() - sbi->ll_statfs_max_age,
414 OBD_STATFS_FOR_MDT0);
416 GOTO(out_md_fid, err);
418 /* This needs to be after statfs to ensure connect has finished.
419 * Note that "data" does NOT contain the valid connect reply.
420 * If connecting to a 1.8 server there will be no LMV device, so
421 * we can access the MDC export directly and exp_connect_flags will
422 * be non-zero, but if accessing an upgraded 2.1 server it will
423 * have the correct flags filled in.
424 * XXX: fill in the LMV exp_connect_flags from MDC(s). */
425 valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
426 if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
427 valid != CLIENT_CONNECT_MDT_REQD) {
430 OBD_ALLOC_WAIT(buf, PAGE_SIZE);
431 obd_connect_flags2str(buf, PAGE_SIZE,
432 valid ^ CLIENT_CONNECT_MDT_REQD, 0, ",");
433 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
434 "feature(s) needed for correct operation "
435 "of this client (%s). Please upgrade "
436 "server or downgrade client.\n",
437 sbi->ll_md_exp->exp_obd->obd_name, buf);
438 OBD_FREE(buf, PAGE_SIZE);
439 GOTO(out_md_fid, err = -EPROTO);
442 size = sizeof(*data);
443 err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
444 KEY_CONN_DATA, &size, data);
446 CERROR("%s: Get connect data failed: rc = %d\n",
447 sbi->ll_md_exp->exp_obd->obd_name, err);
448 GOTO(out_md_fid, err);
451 LASSERT(osfs->os_bsize);
452 sb->s_blocksize = osfs->os_bsize;
453 sb->s_blocksize_bits = log2(osfs->os_bsize);
454 sb->s_magic = LL_SUPER_MAGIC;
455 sb->s_maxbytes = MAX_LFS_FILESIZE;
456 sbi->ll_namelen = osfs->os_namelen;
457 sbi->ll_mnt.mnt = current->fs->root.mnt;
459 if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
460 !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
461 LCONSOLE_INFO("Disabling user_xattr feature because "
462 "it is not supported on the server\n");
463 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
466 if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
468 sb->s_flags |= SB_POSIXACL;
470 sbi->ll_flags |= LL_SBI_ACL;
472 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
474 sb->s_flags &= ~SB_POSIXACL;
476 sbi->ll_flags &= ~LL_SBI_ACL;
479 if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
480 sbi->ll_flags |= LL_SBI_64BIT_HASH;
482 if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK)
483 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
485 if (obd_connect_has_secctx(data))
486 sbi->ll_flags |= LL_SBI_FILE_SECCTX;
488 if (ll_sbi_has_encrypt(sbi) && !obd_connect_has_enc(data)) {
489 if (ll_sbi_has_test_dummy_encryption(sbi))
490 LCONSOLE_WARN("%s: server %s does not support encryption feature, encryption deactivated.\n",
492 sbi->ll_md_exp->exp_obd->obd_name);
493 ll_sbi_set_encrypt(sbi, false);
496 if (data->ocd_ibits_known & MDS_INODELOCK_XATTR) {
497 if (!(data->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)) {
498 LCONSOLE_INFO("%s: disabling xattr cache due to "
499 "unknown maximum xattr size.\n", dt);
500 } else if (!sbi->ll_xattr_cache_set) {
501 /* If xattr_cache is already set (no matter 0 or 1)
502 * during processing llog, it won't be enabled here. */
503 sbi->ll_flags |= LL_SBI_XATTR_CACHE;
504 sbi->ll_xattr_cache_enabled = 1;
508 sbi->ll_dt_obd = class_name2obd(dt);
509 if (!sbi->ll_dt_obd) {
510 CERROR("DT %s: not setup or attached\n", dt);
511 GOTO(out_md_fid, err = -ENODEV);
514 /* pass client page size via ocd_grant_blkbits, the server should report
515 * back its backend blocksize for grant calculation purpose */
516 data->ocd_grant_blkbits = PAGE_SHIFT;
518 /* indicate OST features supported by this client */
519 data->ocd_connect_flags = OBD_CONNECT_GRANT | OBD_CONNECT_VERSION |
520 OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
521 OBD_CONNECT_CANCELSET | OBD_CONNECT_FID |
522 OBD_CONNECT_SRVLOCK |
523 OBD_CONNECT_AT | OBD_CONNECT_OSS_CAPA |
524 OBD_CONNECT_VBR | OBD_CONNECT_FULL20 |
525 OBD_CONNECT_64BITHASH | OBD_CONNECT_MAXBYTES |
526 OBD_CONNECT_EINPROGRESS |
527 OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
528 OBD_CONNECT_LAYOUTLOCK |
529 OBD_CONNECT_PINGLESS | OBD_CONNECT_LFSCK |
530 OBD_CONNECT_BULK_MBITS | OBD_CONNECT_SHORTIO |
531 OBD_CONNECT_FLAGS2 | OBD_CONNECT_GRANT_SHRINK;
532 data->ocd_connect_flags2 = OBD_CONNECT2_LOCKAHEAD |
533 OBD_CONNECT2_INC_XID | OBD_CONNECT2_LSEEK |
534 OBD_CONNECT2_REP_MBITS;
536 if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_GRANT_PARAM))
537 data->ocd_connect_flags |= OBD_CONNECT_GRANT_PARAM;
539 /* OBD_CONNECT_CKSUM should always be set, even if checksums are
540 * disabled by default, because it can still be enabled on the
541 * fly via /sys. As a consequence, we still need to come to an
542 * agreement on the supported algorithms at connect time
544 data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
546 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
547 data->ocd_cksum_types = OBD_CKSUM_ADLER;
549 data->ocd_cksum_types = obd_cksum_types_supported_client();
551 #ifdef HAVE_LRU_RESIZE_SUPPORT
552 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
554 /* always ping even if server suppress_pings */
555 if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
556 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
558 if (ll_sbi_has_encrypt(sbi))
559 obd_connect_set_enc(data);
561 CDEBUG(D_RPCTRACE, "ocd_connect_flags: %#llx ocd_version: %d "
562 "ocd_grant: %d\n", data->ocd_connect_flags,
563 data->ocd_version, data->ocd_grant);
565 sbi->ll_dt_obd->obd_upcall.onu_owner = &sbi->ll_lco;
566 sbi->ll_dt_obd->obd_upcall.onu_upcall = cl_ocd_update;
568 data->ocd_brw_size = DT_MAX_BRW_SIZE;
570 err = obd_connect(NULL, &sbi->ll_dt_exp, sbi->ll_dt_obd,
571 &sbi->ll_sb_uuid, data, sbi->ll_cache);
573 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
574 "recovery, of which this client is not a "
575 "part. Please wait for recovery to "
576 "complete, abort, or time out.\n", dt);
579 CERROR("%s: Cannot connect to %s: rc = %d\n",
580 sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
584 if (ll_sbi_has_encrypt(sbi) &&
585 !obd_connect_has_enc(&sbi->ll_dt_obd->u.lov.lov_ocd)) {
586 if (ll_sbi_has_test_dummy_encryption(sbi))
587 LCONSOLE_WARN("%s: server %s does not support encryption feature, encryption deactivated.\n",
589 ll_sbi_set_encrypt(sbi, false);
590 } else if (ll_sbi_has_test_dummy_encryption(sbi)) {
591 LCONSOLE_WARN("Test dummy encryption mode enabled\n");
594 sbi->ll_dt_exp->exp_connect_data = *data;
596 /* Don't change value if it was specified in the config log */
597 if (sbi->ll_ra_info.ra_max_read_ahead_whole_pages == -1) {
598 sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
599 max_t(unsigned long, SBI_DEFAULT_READ_AHEAD_WHOLE_MAX,
600 (data->ocd_brw_size >> PAGE_SHIFT));
601 if (sbi->ll_ra_info.ra_max_read_ahead_whole_pages >
602 sbi->ll_ra_info.ra_max_pages_per_file)
603 sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
604 sbi->ll_ra_info.ra_max_pages_per_file;
607 err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
608 LUSTRE_SEQ_METADATA);
610 CERROR("%s: Can't init data layer FID infrastructure, "
611 "rc = %d\n", sbi->ll_dt_exp->exp_obd->obd_name, err);
615 mutex_lock(&sbi->ll_lco.lco_lock);
616 sbi->ll_lco.lco_flags = data->ocd_connect_flags;
617 sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
618 sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
619 mutex_unlock(&sbi->ll_lco.lco_lock);
621 fid_zero(&sbi->ll_root_fid);
622 err = md_get_root(sbi->ll_md_exp, get_mount_fileset(sb),
625 CERROR("cannot mds_connect: rc = %d\n", err);
626 GOTO(out_lock_cn_cb, err);
628 if (!fid_is_sane(&sbi->ll_root_fid)) {
629 CERROR("%s: Invalid root fid "DFID" during mount\n",
630 sbi->ll_md_exp->exp_obd->obd_name,
631 PFID(&sbi->ll_root_fid));
632 GOTO(out_lock_cn_cb, err = -EINVAL);
634 CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
636 sb->s_op = &lustre_super_operations;
637 sb->s_xattr = ll_xattr_handlers;
638 #if THREAD_SIZE >= 8192 /*b=17630*/
639 sb->s_export_op = &lustre_export_operations;
641 #ifdef HAVE_LUSTRE_CRYPTO
642 llcrypt_set_ops(sb, &lustre_cryptops);
646 * XXX: move this to after cbd setup? */
647 valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMODEASIZE;
648 if (sbi->ll_flags & LL_SBI_ACL)
649 valid |= OBD_MD_FLACL;
651 OBD_ALLOC_PTR(op_data);
653 GOTO(out_lock_cn_cb, err = -ENOMEM);
655 op_data->op_fid1 = sbi->ll_root_fid;
656 op_data->op_mode = 0;
657 op_data->op_valid = valid;
659 err = md_getattr(sbi->ll_md_exp, op_data, &request);
661 OBD_FREE_PTR(op_data);
663 CERROR("%s: md_getattr failed for root: rc = %d\n",
664 sbi->ll_md_exp->exp_obd->obd_name, err);
665 GOTO(out_lock_cn_cb, err);
668 err = md_get_lustre_md(sbi->ll_md_exp, &request->rq_pill,
669 sbi->ll_dt_exp, sbi->ll_md_exp, &lmd);
671 CERROR("failed to understand root inode md: rc = %d\n", err);
672 ptlrpc_req_finished(request);
673 GOTO(out_lock_cn_cb, err);
676 LASSERT(fid_is_sane(&sbi->ll_root_fid));
677 root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
678 sbi->ll_flags & LL_SBI_32BIT_API),
680 md_free_lustre_md(sbi->ll_md_exp, &lmd);
681 ptlrpc_req_finished(request);
685 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
687 CERROR("%s: bad ll_iget() for root: rc = %d\n",
688 sbi->ll_fsname, err);
692 checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
693 if (sbi->ll_checksum_set) {
694 err = obd_set_info_async(NULL, sbi->ll_dt_exp,
695 sizeof(KEY_CHECKSUM), KEY_CHECKSUM,
696 sizeof(checksum), &checksum, NULL);
698 CERROR("%s: Set checksum failed: rc = %d\n",
699 sbi->ll_dt_exp->exp_obd->obd_name, err);
705 sb->s_root = d_make_root(root);
706 if (sb->s_root == NULL) {
708 CERROR("%s: can't make root dentry: rc = %d\n",
709 sbi->ll_fsname, err);
713 sbi->ll_sdev_orig = sb->s_dev;
715 /* We set sb->s_dev equal on all lustre clients in order to support
716 * NFS export clustering. NFSD requires that the FSID be the same
718 /* s_dev is also used in lt_compare() to compare two fs, but that is
719 * only a node-local comparison. */
720 uuid = obd_get_uuid(sbi->ll_md_exp);
722 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
729 if (sbi->ll_dt_obd) {
730 err = sysfs_create_link(&sbi->ll_kset.kobj,
731 &sbi->ll_dt_obd->obd_kset.kobj,
732 sbi->ll_dt_obd->obd_type->typ_name);
734 CERROR("%s: could not register %s in llite: rc = %d\n",
735 dt, sbi->ll_fsname, err);
740 if (sbi->ll_md_obd) {
741 err = sysfs_create_link(&sbi->ll_kset.kobj,
742 &sbi->ll_md_obd->obd_kset.kobj,
743 sbi->ll_md_obd->obd_type->typ_name);
745 CERROR("%s: could not register %s in llite: rc = %d\n",
746 md, sbi->ll_fsname, err);
755 obd_fid_fini(sbi->ll_dt_exp->exp_obd);
757 obd_disconnect(sbi->ll_dt_exp);
758 sbi->ll_dt_exp = NULL;
759 sbi->ll_dt_obd = NULL;
761 obd_fid_fini(sbi->ll_md_exp->exp_obd);
763 obd_disconnect(sbi->ll_md_exp);
764 sbi->ll_md_exp = NULL;
765 sbi->ll_md_obd = NULL;
774 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
778 size = sizeof(*lmmsize);
779 rc = obd_get_info(NULL, sbi->ll_dt_exp, sizeof(KEY_MAX_EASIZE),
780 KEY_MAX_EASIZE, &size, lmmsize);
782 CERROR("%s: cannot get max LOV EA size: rc = %d\n",
783 sbi->ll_dt_exp->exp_obd->obd_name, rc);
787 CDEBUG(D_INFO, "max LOV ea size: %d\n", *lmmsize);
790 rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
791 KEY_MAX_EASIZE, &size, lmmsize);
793 CERROR("Get max mdsize error rc %d\n", rc);
795 CDEBUG(D_INFO, "max LMV ea size: %d\n", *lmmsize);
801 * Get the value of the default_easize parameter.
803 * \see client_obd::cl_default_mds_easize
805 * \param[in] sbi superblock info for this filesystem
806 * \param[out] lmmsize pointer to storage location for value
808 * \retval 0 on success
809 * \retval negative negated errno on failure
811 int ll_get_default_mdsize(struct ll_sb_info *sbi, int *lmmsize)
816 rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_DEFAULT_EASIZE),
817 KEY_DEFAULT_EASIZE, &size, lmmsize);
819 CERROR("Get default mdsize error rc %d\n", rc);
825 * Set the default_easize parameter to the given value.
827 * \see client_obd::cl_default_mds_easize
829 * \param[in] sbi superblock info for this filesystem
830 * \param[in] lmmsize the size to set
832 * \retval 0 on success
833 * \retval negative negated errno on failure
835 int ll_set_default_mdsize(struct ll_sb_info *sbi, int lmmsize)
839 if (lmmsize < sizeof(struct lov_mds_md) ||
840 lmmsize > OBD_MAX_DEFAULT_EA_SIZE)
843 rc = obd_set_info_async(NULL, sbi->ll_md_exp,
844 sizeof(KEY_DEFAULT_EASIZE), KEY_DEFAULT_EASIZE,
845 sizeof(int), &lmmsize, NULL);
850 static void client_common_put_super(struct super_block *sb)
852 struct ll_sb_info *sbi = ll_s2sbi(sb);
857 obd_fid_fini(sbi->ll_dt_exp->exp_obd);
858 obd_disconnect(sbi->ll_dt_exp);
859 sbi->ll_dt_exp = NULL;
861 ll_debugfs_unregister_super(sb);
863 obd_fid_fini(sbi->ll_md_exp->exp_obd);
864 obd_disconnect(sbi->ll_md_exp);
865 sbi->ll_md_exp = NULL;
870 void ll_kill_super(struct super_block *sb)
872 struct ll_sb_info *sbi;
876 if (!(sb->s_flags & SB_ACTIVE))
880 /* we need restore s_dev from changed for clustred NFS before put_super
881 * because new kernels have cached s_dev and change sb->s_dev in
882 * put_super not affected real removing devices */
884 sb->s_dev = sbi->ll_sdev_orig;
886 /* wait running statahead threads to quit */
887 while (atomic_read(&sbi->ll_sa_running) > 0)
888 schedule_timeout_uninterruptible(
889 cfs_time_seconds(1) >> 3);
895 static inline int ll_set_opt(const char *opt, char *data, int fl)
897 if (strncmp(opt, data, strlen(opt)) != 0)
903 /* non-client-specific mount options are parsed in lmd_parse */
904 static int ll_options(char *options, struct ll_sb_info *sbi)
907 char *s1 = options, *s2;
908 int *flags = &sbi->ll_flags;
914 CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
917 CDEBUG(D_SUPER, "next opt=%s\n", s1);
918 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
923 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
925 *flags = (*flags & ~LL_SBI_LOCALFLOCK) | tmp;
928 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
930 *flags = (*flags & ~LL_SBI_FLOCK) | tmp;
933 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
938 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
943 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
948 tmp = ll_set_opt("context", s1, 1);
951 tmp = ll_set_opt("fscontext", s1, 1);
954 tmp = ll_set_opt("defcontext", s1, 1);
957 tmp = ll_set_opt("rootcontext", s1, 1);
960 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
965 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
971 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
974 sbi->ll_checksum_set = 1;
977 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
980 sbi->ll_checksum_set = 1;
983 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
988 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
993 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
998 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
1003 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
1008 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
1013 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
1018 tmp = ll_set_opt("always_ping", s1, LL_SBI_ALWAYS_PING);
1023 tmp = ll_set_opt("test_dummy_encryption", s1,
1024 LL_SBI_TEST_DUMMY_ENCRYPTION);
1026 #ifdef HAVE_LUSTRE_CRYPTO
1029 LCONSOLE_WARN("Test dummy encryption mount option ignored: encryption not supported\n");
1033 tmp = ll_set_opt("noencrypt", s1, LL_SBI_ENCRYPT);
1035 #ifdef HAVE_LUSTRE_CRYPTO
1038 LCONSOLE_WARN("noencrypt mount option ignored: encryption not supported\n");
1042 tmp = ll_set_opt("foreign_symlink", s1, LL_SBI_FOREIGN_SYMLINK);
1044 int prefix_pos = sizeof("foreign_symlink=") - 1;
1045 int equal_pos = sizeof("foreign_symlink=") - 2;
1047 /* non-default prefix provided ? */
1048 if (strlen(s1) >= sizeof("foreign_symlink=") &&
1049 *(s1 + equal_pos) == '=') {
1050 char *old = sbi->ll_foreign_symlink_prefix;
1052 sbi->ll_foreign_symlink_prefix_size;
1054 /* path must be absolute */
1055 if (*(s1 + sizeof("foreign_symlink=")
1057 LCONSOLE_ERROR_MSG(0x152,
1058 "foreign prefix '%s' must be an absolute path\n",
1063 s2 = strchrnul(s1 + prefix_pos, ',');
1065 if (sbi->ll_foreign_symlink_prefix) {
1066 sbi->ll_foreign_symlink_prefix = NULL;
1067 sbi->ll_foreign_symlink_prefix_size = 0;
1069 /* alloc for path length and '\0' */
1070 OBD_ALLOC(sbi->ll_foreign_symlink_prefix,
1071 s2 - (s1 + prefix_pos) + 1);
1072 if (!sbi->ll_foreign_symlink_prefix) {
1073 /* restore previous */
1074 sbi->ll_foreign_symlink_prefix = old;
1075 sbi->ll_foreign_symlink_prefix_size =
1080 OBD_FREE(old, old_len);
1081 strncpy(sbi->ll_foreign_symlink_prefix,
1083 s2 - (s1 + prefix_pos));
1084 sbi->ll_foreign_symlink_prefix_size =
1085 s2 - (s1 + prefix_pos) + 1;
1087 LCONSOLE_ERROR_MSG(0x152,
1088 "invalid %s option\n", s1);
1090 /* enable foreign symlink support */
1094 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
1100 s2 = strchr(s1, ',');
1108 void ll_lli_init(struct ll_inode_info *lli)
1110 lli->lli_inode_magic = LLI_INODE_MAGIC;
1112 rwlock_init(&lli->lli_lock);
1113 lli->lli_posix_acl = NULL;
1114 /* Do not set lli_fid, it has been initialized already. */
1115 fid_zero(&lli->lli_pfid);
1116 lli->lli_mds_read_och = NULL;
1117 lli->lli_mds_write_och = NULL;
1118 lli->lli_mds_exec_och = NULL;
1119 lli->lli_open_fd_read_count = 0;
1120 lli->lli_open_fd_write_count = 0;
1121 lli->lli_open_fd_exec_count = 0;
1122 mutex_init(&lli->lli_och_mutex);
1123 spin_lock_init(&lli->lli_agl_lock);
1124 spin_lock_init(&lli->lli_layout_lock);
1125 ll_layout_version_set(lli, CL_LAYOUT_GEN_NONE);
1126 lli->lli_clob = NULL;
1128 init_rwsem(&lli->lli_xattrs_list_rwsem);
1129 mutex_init(&lli->lli_xattrs_enq_lock);
1131 LASSERT(lli->lli_vfs_inode.i_mode != 0);
1132 if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
1133 lli->lli_opendir_key = NULL;
1134 lli->lli_sai = NULL;
1135 spin_lock_init(&lli->lli_sa_lock);
1136 lli->lli_opendir_pid = 0;
1137 lli->lli_sa_enabled = 0;
1138 init_rwsem(&lli->lli_lsm_sem);
1140 mutex_init(&lli->lli_size_mutex);
1141 mutex_init(&lli->lli_setattr_mutex);
1142 lli->lli_symlink_name = NULL;
1143 ll_trunc_sem_init(&lli->lli_trunc_sem);
1144 range_lock_tree_init(&lli->lli_write_tree);
1145 init_rwsem(&lli->lli_glimpse_sem);
1146 lli->lli_glimpse_time = ktime_set(0, 0);
1147 INIT_LIST_HEAD(&lli->lli_agl_list);
1148 lli->lli_agl_index = 0;
1149 lli->lli_async_rc = 0;
1150 spin_lock_init(&lli->lli_heat_lock);
1151 obd_heat_clear(lli->lli_heat_instances, OBD_HEAT_COUNT);
1152 lli->lli_heat_flags = 0;
1153 mutex_init(&lli->lli_pcc_lock);
1154 lli->lli_pcc_state = PCC_STATE_FL_NONE;
1155 lli->lli_pcc_inode = NULL;
1156 lli->lli_pcc_dsflags = PCC_DATASET_INVALID;
1157 lli->lli_pcc_generation = 0;
1158 mutex_init(&lli->lli_group_mutex);
1159 lli->lli_group_users = 0;
1160 lli->lli_group_gid = 0;
1162 mutex_init(&lli->lli_layout_mutex);
1163 memset(lli->lli_jobid, 0, sizeof(lli->lli_jobid));
1164 /* ll_cl_context initialize */
1165 INIT_LIST_HEAD(&lli->lli_lccs);
1168 #define MAX_STRING_SIZE 128
1170 #ifndef HAVE_SUPER_SETUP_BDI_NAME
1172 #define LSI_BDI_INITIALIZED 0x00400000
1174 #ifndef HAVE_BDI_CAP_MAP_COPY
1175 # define BDI_CAP_MAP_COPY 0
1178 static int super_setup_bdi_name(struct super_block *sb, char *fmt, ...)
1180 struct lustre_sb_info *lsi = s2lsi(sb);
1181 char buf[MAX_STRING_SIZE];
1185 err = bdi_init(&lsi->lsi_bdi);
1189 lsi->lsi_flags |= LSI_BDI_INITIALIZED;
1190 lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
1191 lsi->lsi_bdi.name = "lustre";
1192 va_start(args, fmt);
1193 vsnprintf(buf, MAX_STRING_SIZE, fmt, args);
1195 err = bdi_register(&lsi->lsi_bdi, NULL, "%s", buf);
1198 sb->s_bdi = &lsi->lsi_bdi;
1202 #endif /* !HAVE_SUPER_SETUP_BDI_NAME */
1204 int ll_fill_super(struct super_block *sb)
1206 struct lustre_profile *lprof = NULL;
1207 struct lustre_sb_info *lsi = s2lsi(sb);
1208 struct ll_sb_info *sbi = NULL;
1209 char *dt = NULL, *md = NULL;
1210 char *profilenm = get_profile_name(sb);
1211 struct config_llog_instance *cfg;
1212 /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
1213 const int instlen = LUSTRE_MAXINSTANCE + 2;
1214 unsigned long cfg_instance = ll_get_cfg_instance(sb);
1215 char name[MAX_STRING_SIZE];
1224 /* for ASLR, to map between cfg_instance and hashed ptr */
1225 CDEBUG(D_VFSTRACE, "VFS Op: cfg_instance %s-%016lx (sb %p)\n",
1226 profilenm, cfg_instance, sb);
1228 OBD_RACE(OBD_FAIL_LLITE_RACE_MOUNT);
1232 GOTO(out_free_cfg, err = -ENOMEM);
1234 /* client additional sb info */
1235 lsi->lsi_llsbi = sbi = ll_init_sbi();
1237 GOTO(out_free_cfg, err = PTR_ERR(sbi));
1239 err = ll_options(lsi->lsi_lmd->lmd_opts, sbi);
1241 GOTO(out_free_cfg, err);
1243 /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
1244 sb->s_d_op = &ll_d_ops;
1247 generate_random_uuid(uuid.b);
1248 snprintf(sbi->ll_sb_uuid.uuid, sizeof(sbi->ll_sb_uuid), "%pU", uuid.b);
1250 CDEBUG(D_CONFIG, "llite sb uuid: %s\n", sbi->ll_sb_uuid.uuid);
1253 len = strlen(profilenm);
1254 ptr = strrchr(profilenm, '-');
1255 if (ptr && (strcmp(ptr, "-client") == 0))
1258 if (len > LUSTRE_MAXFSNAME) {
1259 if (unlikely(len >= MAX_STRING_SIZE))
1260 len = MAX_STRING_SIZE - 1;
1261 strncpy(name, profilenm, len);
1263 err = -ENAMETOOLONG;
1264 CERROR("%s: fsname longer than %u characters: rc = %d\n",
1265 name, LUSTRE_MAXFSNAME, err);
1266 GOTO(out_free_cfg, err);
1268 strncpy(sbi->ll_fsname, profilenm, len);
1269 sbi->ll_fsname[len] = '\0';
1272 snprintf(name, sizeof(name), "%.*s-%016lx", len,
1273 profilenm, cfg_instance);
1275 err = super_setup_bdi_name(sb, "%s", name);
1277 GOTO(out_free_cfg, err);
1279 /* Call ll_debugfs_register_super() before lustre_process_log()
1280 * so that "llite.*.*" params can be processed correctly.
1282 err = ll_debugfs_register_super(sb, name);
1284 CERROR("%s: could not register mountpoint in llite: rc = %d\n",
1285 sbi->ll_fsname, err);
1289 /* The cfg_instance is a value unique to this super, in case some
1290 * joker tries to mount the same fs at two mount points.
1292 cfg->cfg_instance = cfg_instance;
1293 cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
1294 cfg->cfg_callback = class_config_llog_handler;
1295 cfg->cfg_sub_clds = CONFIG_SUB_CLIENT;
1296 /* set up client obds */
1297 err = lustre_process_log(sb, profilenm, cfg);
1299 GOTO(out_debugfs, err);
1301 /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1302 lprof = class_get_profile(profilenm);
1303 if (lprof == NULL) {
1304 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1305 " read from the MGS. Does that filesystem "
1306 "exist?\n", profilenm);
1307 GOTO(out_debugfs, err = -EINVAL);
1309 CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1310 lprof->lp_md, lprof->lp_dt);
1312 dt_len = strlen(lprof->lp_dt) + instlen + 2;
1313 OBD_ALLOC(dt, dt_len);
1315 GOTO(out_profile, err = -ENOMEM);
1316 snprintf(dt, dt_len - 1, "%s-%016lx", lprof->lp_dt, cfg_instance);
1318 md_len = strlen(lprof->lp_md) + instlen + 2;
1319 OBD_ALLOC(md, md_len);
1321 GOTO(out_free_dt, err = -ENOMEM);
1322 snprintf(md, md_len - 1, "%s-%016lx", lprof->lp_md, cfg_instance);
1324 /* connections, registrations, sb setup */
1325 err = client_common_fill_super(sb, md, dt);
1327 GOTO(out_free_md, err);
1329 sbi->ll_client_common_fill_super_succeeded = 1;
1333 OBD_FREE(md, md_len);
1336 OBD_FREE(dt, dt_len);
1339 class_put_profile(lprof);
1342 ll_debugfs_unregister_super(sb);
1349 else if (sbi->ll_flags & LL_SBI_VERBOSE)
1350 LCONSOLE_WARN("Mounted %s\n", profilenm);
1352 } /* ll_fill_super */
1354 void ll_put_super(struct super_block *sb)
1356 struct config_llog_instance cfg, params_cfg;
1357 struct obd_device *obd;
1358 struct lustre_sb_info *lsi = s2lsi(sb);
1359 struct ll_sb_info *sbi = ll_s2sbi(sb);
1360 char *profilenm = get_profile_name(sb);
1361 unsigned long cfg_instance = ll_get_cfg_instance(sb);
1363 int next, force = 1, rc = 0;
1367 GOTO(out_no_sbi, 0);
1369 /* Should replace instance_id with something better for ASLR */
1370 CDEBUG(D_VFSTRACE, "VFS Op: cfg_instance %s-%016lx (sb %p)\n",
1371 profilenm, cfg_instance, sb);
1373 cfg.cfg_instance = cfg_instance;
1374 lustre_end_log(sb, profilenm, &cfg);
1376 params_cfg.cfg_instance = cfg_instance;
1377 lustre_end_log(sb, PARAMS_FILENAME, ¶ms_cfg);
1379 if (sbi->ll_md_exp) {
1380 obd = class_exp2obd(sbi->ll_md_exp);
1382 force = obd->obd_force;
1385 /* Wait for unstable pages to be committed to stable storage */
1387 rc = l_wait_event_abortable(
1388 sbi->ll_cache->ccc_unstable_waitq,
1389 atomic_long_read(&sbi->ll_cache->ccc_unstable_nr) == 0);
1392 ccc_count = atomic_long_read(&sbi->ll_cache->ccc_unstable_nr);
1393 if (force == 0 && rc != -ERESTARTSYS)
1394 LASSERTF(ccc_count == 0, "count: %li\n", ccc_count);
1396 /* We need to set force before the lov_disconnect in
1397 * lustre_common_put_super, since l_d cleans up osc's as well.
1401 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1403 obd->obd_force = force;
1407 if (sbi->ll_client_common_fill_super_succeeded) {
1408 /* Only if client_common_fill_super succeeded */
1409 client_common_put_super(sb);
1413 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)))
1414 class_manual_cleanup(obd);
1416 if (sbi->ll_flags & LL_SBI_VERBOSE)
1417 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1420 class_del_profile(profilenm);
1422 #ifndef HAVE_SUPER_SETUP_BDI_NAME
1423 if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1424 bdi_destroy(&lsi->lsi_bdi);
1425 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1430 lsi->lsi_llsbi = NULL;
1432 lustre_common_put_super(sb);
1434 cl_env_cache_purge(~0);
1437 } /* client_put_super */
1439 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1441 struct inode *inode = NULL;
1443 /* NOTE: we depend on atomic igrab() -bzzz */
1444 lock_res_and_lock(lock);
1445 if (lock->l_resource->lr_lvb_inode) {
1446 struct ll_inode_info * lli;
1447 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1448 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1449 inode = igrab(lock->l_resource->lr_lvb_inode);
1451 inode = lock->l_resource->lr_lvb_inode;
1452 LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ? D_INFO :
1453 D_WARNING, lock, "lr_lvb_inode %p is "
1454 "bogus: magic %08x",
1455 lock->l_resource->lr_lvb_inode,
1456 lli->lli_inode_magic);
1460 unlock_res_and_lock(lock);
1464 void ll_dir_clear_lsm_md(struct inode *inode)
1466 struct ll_inode_info *lli = ll_i2info(inode);
1468 LASSERT(S_ISDIR(inode->i_mode));
1470 if (lli->lli_lsm_md) {
1471 lmv_free_memmd(lli->lli_lsm_md);
1472 lli->lli_lsm_md = NULL;
1475 if (lli->lli_default_lsm_md) {
1476 lmv_free_memmd(lli->lli_default_lsm_md);
1477 lli->lli_default_lsm_md = NULL;
1481 static struct inode *ll_iget_anon_dir(struct super_block *sb,
1482 const struct lu_fid *fid,
1483 struct lustre_md *md)
1485 struct ll_sb_info *sbi = ll_s2sbi(sb);
1486 struct ll_inode_info *lli;
1487 struct mdt_body *body = md->body;
1488 struct inode *inode;
1494 ino = cl_fid_build_ino(fid, sbi->ll_flags & LL_SBI_32BIT_API);
1495 inode = iget_locked(sb, ino);
1496 if (inode == NULL) {
1497 CERROR("%s: failed get simple inode "DFID": rc = -ENOENT\n",
1498 sbi->ll_fsname, PFID(fid));
1499 RETURN(ERR_PTR(-ENOENT));
1502 lli = ll_i2info(inode);
1503 if (inode->i_state & I_NEW) {
1504 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1505 (body->mbo_mode & S_IFMT);
1506 LASSERTF(S_ISDIR(inode->i_mode), "Not slave inode "DFID"\n",
1509 inode->i_mtime.tv_sec = 0;
1510 inode->i_atime.tv_sec = 0;
1511 inode->i_ctime.tv_sec = 0;
1514 #ifdef HAVE_BACKING_DEV_INFO
1515 /* initializing backing dev info. */
1516 inode->i_mapping->backing_dev_info =
1517 &s2lsi(inode->i_sb)->lsi_bdi;
1519 inode->i_op = &ll_dir_inode_operations;
1520 inode->i_fop = &ll_dir_operations;
1521 lli->lli_fid = *fid;
1524 /* master object FID */
1525 lli->lli_pfid = body->mbo_fid1;
1526 CDEBUG(D_INODE, "lli %p slave "DFID" master "DFID"\n",
1527 lli, PFID(fid), PFID(&lli->lli_pfid));
1528 unlock_new_inode(inode);
1530 /* in directory restripe/auto-split, a directory will be
1531 * transformed to a stripe if it's plain, set its pfid here,
1532 * otherwise ll_lock_cancel_bits() can't find the master inode.
1534 lli->lli_pfid = body->mbo_fid1;
1540 static int ll_init_lsm_md(struct inode *inode, struct lustre_md *md)
1543 struct lmv_stripe_md *lsm = md->lmv;
1544 struct ll_inode_info *lli = ll_i2info(inode);
1547 LASSERT(lsm != NULL);
1549 CDEBUG(D_INODE, "%s: "DFID" set dir layout:\n",
1550 ll_i2sbi(inode)->ll_fsname, PFID(&lli->lli_fid));
1551 lsm_md_dump(D_INODE, lsm);
1553 if (!lmv_dir_striped(lsm))
1556 /* XXX sigh, this lsm_root initialization should be in
1557 * LMV layer, but it needs ll_iget right now, so we
1558 * put this here right now. */
1559 for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
1560 fid = &lsm->lsm_md_oinfo[i].lmo_fid;
1561 LASSERT(lsm->lsm_md_oinfo[i].lmo_root == NULL);
1563 if (!fid_is_sane(fid))
1566 /* Unfortunately ll_iget will call ll_update_inode,
1567 * where the initialization of slave inode is slightly
1568 * different, so it reset lsm_md to NULL to avoid
1569 * initializing lsm for slave inode. */
1570 lsm->lsm_md_oinfo[i].lmo_root =
1571 ll_iget_anon_dir(inode->i_sb, fid, md);
1572 if (IS_ERR(lsm->lsm_md_oinfo[i].lmo_root)) {
1573 int rc = PTR_ERR(lsm->lsm_md_oinfo[i].lmo_root);
1575 lsm->lsm_md_oinfo[i].lmo_root = NULL;
1577 iput(lsm->lsm_md_oinfo[i].lmo_root);
1578 lsm->lsm_md_oinfo[i].lmo_root = NULL;
1584 lli->lli_lsm_md = lsm;
1589 static void ll_update_default_lsm_md(struct inode *inode, struct lustre_md *md)
1591 struct ll_inode_info *lli = ll_i2info(inode);
1593 if (!md->default_lmv) {
1594 /* clear default lsm */
1595 if (lli->lli_default_lsm_md) {
1596 down_write(&lli->lli_lsm_sem);
1597 if (lli->lli_default_lsm_md) {
1598 lmv_free_memmd(lli->lli_default_lsm_md);
1599 lli->lli_default_lsm_md = NULL;
1601 up_write(&lli->lli_lsm_sem);
1606 if (lli->lli_default_lsm_md) {
1607 /* do nonthing if default lsm isn't changed */
1608 down_read(&lli->lli_lsm_sem);
1609 if (lli->lli_default_lsm_md &&
1610 lsm_md_eq(lli->lli_default_lsm_md, md->default_lmv)) {
1611 up_read(&lli->lli_lsm_sem);
1614 up_read(&lli->lli_lsm_sem);
1617 down_write(&lli->lli_lsm_sem);
1618 if (lli->lli_default_lsm_md)
1619 lmv_free_memmd(lli->lli_default_lsm_md);
1620 lli->lli_default_lsm_md = md->default_lmv;
1621 lsm_md_dump(D_INODE, md->default_lmv);
1622 md->default_lmv = NULL;
1623 up_write(&lli->lli_lsm_sem);
1626 static int ll_update_lsm_md(struct inode *inode, struct lustre_md *md)
1628 struct ll_inode_info *lli = ll_i2info(inode);
1629 struct lmv_stripe_md *lsm = md->lmv;
1630 struct cl_attr *attr;
1635 LASSERT(S_ISDIR(inode->i_mode));
1636 CDEBUG(D_INODE, "update lsm %p of "DFID"\n", lli->lli_lsm_md,
1637 PFID(ll_inode2fid(inode)));
1639 /* update default LMV */
1640 if (md->default_lmv)
1641 ll_update_default_lsm_md(inode, md);
1643 /* after dir migration/restripe, a stripe may be turned into a
1644 * directory, in this case, zero out its lli_pfid.
1646 if (unlikely(fid_is_norm(&lli->lli_pfid)))
1647 fid_zero(&lli->lli_pfid);
1650 * no striped information from request, lustre_md from req does not
1651 * include stripeEA, see ll_md_setattr()
1657 * normally dir layout doesn't change, only take read lock to check
1658 * that to avoid blocking other MD operations.
1660 down_read(&lli->lli_lsm_sem);
1662 /* some current lookup initialized lsm, and unchanged */
1663 if (lli->lli_lsm_md && lsm_md_eq(lli->lli_lsm_md, lsm))
1664 GOTO(unlock, rc = 0);
1666 /* if dir layout doesn't match, check whether version is increased,
1667 * which means layout is changed, this happens in dir split/merge and
1670 * foreign LMV should not change.
1672 if (lli->lli_lsm_md && lmv_dir_striped(lli->lli_lsm_md) &&
1673 lsm->lsm_md_layout_version <=
1674 lli->lli_lsm_md->lsm_md_layout_version) {
1675 CERROR("%s: "DFID" dir layout mismatch:\n",
1676 ll_i2sbi(inode)->ll_fsname, PFID(&lli->lli_fid));
1677 lsm_md_dump(D_ERROR, lli->lli_lsm_md);
1678 lsm_md_dump(D_ERROR, lsm);
1679 GOTO(unlock, rc = -EINVAL);
1682 up_read(&lli->lli_lsm_sem);
1683 down_write(&lli->lli_lsm_sem);
1684 /* clear existing lsm */
1685 if (lli->lli_lsm_md) {
1686 lmv_free_memmd(lli->lli_lsm_md);
1687 lli->lli_lsm_md = NULL;
1690 rc = ll_init_lsm_md(inode, md);
1691 up_write(&lli->lli_lsm_sem);
1696 /* set md->lmv to NULL, so the following free lustre_md will not free
1701 /* md_merge_attr() may take long, since lsm is already set, switch to
1704 down_read(&lli->lli_lsm_sem);
1706 if (!lmv_dir_striped(lli->lli_lsm_md))
1707 GOTO(unlock, rc = 0);
1709 OBD_ALLOC_PTR(attr);
1711 GOTO(unlock, rc = -ENOMEM);
1713 /* validate the lsm */
1714 rc = md_merge_attr(ll_i2mdexp(inode), lli->lli_lsm_md, attr,
1715 ll_md_blocking_ast);
1717 if (md->body->mbo_valid & OBD_MD_FLNLINK)
1718 md->body->mbo_nlink = attr->cat_nlink;
1719 if (md->body->mbo_valid & OBD_MD_FLSIZE)
1720 md->body->mbo_size = attr->cat_size;
1721 if (md->body->mbo_valid & OBD_MD_FLATIME)
1722 md->body->mbo_atime = attr->cat_atime;
1723 if (md->body->mbo_valid & OBD_MD_FLCTIME)
1724 md->body->mbo_ctime = attr->cat_ctime;
1725 if (md->body->mbo_valid & OBD_MD_FLMTIME)
1726 md->body->mbo_mtime = attr->cat_mtime;
1732 up_read(&lli->lli_lsm_sem);
1737 void ll_clear_inode(struct inode *inode)
1739 struct ll_inode_info *lli = ll_i2info(inode);
1740 struct ll_sb_info *sbi = ll_i2sbi(inode);
1744 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1745 PFID(ll_inode2fid(inode)), inode);
1747 if (S_ISDIR(inode->i_mode)) {
1748 /* these should have been cleared in ll_file_release */
1749 LASSERT(lli->lli_opendir_key == NULL);
1750 LASSERT(lli->lli_sai == NULL);
1751 LASSERT(lli->lli_opendir_pid == 0);
1753 pcc_inode_free(inode);
1756 md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1758 LASSERT(!lli->lli_open_fd_write_count);
1759 LASSERT(!lli->lli_open_fd_read_count);
1760 LASSERT(!lli->lli_open_fd_exec_count);
1762 if (lli->lli_mds_write_och)
1763 ll_md_real_close(inode, FMODE_WRITE);
1764 if (lli->lli_mds_exec_och)
1765 ll_md_real_close(inode, FMODE_EXEC);
1766 if (lli->lli_mds_read_och)
1767 ll_md_real_close(inode, FMODE_READ);
1769 if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1770 OBD_FREE(lli->lli_symlink_name,
1771 strlen(lli->lli_symlink_name) + 1);
1772 lli->lli_symlink_name = NULL;
1775 ll_xattr_cache_destroy(inode);
1777 forget_all_cached_acls(inode);
1779 lli->lli_inode_magic = LLI_INODE_DEAD;
1781 if (S_ISDIR(inode->i_mode))
1782 ll_dir_clear_lsm_md(inode);
1783 else if (S_ISREG(inode->i_mode) && !is_bad_inode(inode))
1784 LASSERT(list_empty(&lli->lli_agl_list));
1787 * XXX This has to be done before lsm is freed below, because
1788 * cl_object still uses inode lsm.
1790 cl_inode_fini(inode);
1792 llcrypt_put_encryption_info(inode);
1797 static int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data)
1799 struct lustre_md md;
1800 struct inode *inode = dentry->d_inode;
1801 struct ll_sb_info *sbi = ll_i2sbi(inode);
1802 struct ptlrpc_request *request = NULL;
1807 op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1808 LUSTRE_OPC_ANY, NULL);
1809 if (IS_ERR(op_data))
1810 RETURN(PTR_ERR(op_data));
1812 /* If this is a chgrp of a regular file, we want to reserve enough
1813 * quota to cover the entire file size.
1815 if (S_ISREG(inode->i_mode) && op_data->op_attr.ia_valid & ATTR_GID &&
1816 from_kgid(&init_user_ns, op_data->op_attr.ia_gid) !=
1817 from_kgid(&init_user_ns, inode->i_gid)) {
1818 op_data->op_xvalid |= OP_XVALID_BLOCKS;
1819 op_data->op_attr_blocks = inode->i_blocks;
1823 rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &request);
1825 ptlrpc_req_finished(request);
1826 if (rc == -ENOENT) {
1828 /* Unlinked special device node? Or just a race?
1829 * Pretend we done everything. */
1830 if (!S_ISREG(inode->i_mode) &&
1831 !S_ISDIR(inode->i_mode)) {
1832 ia_valid = op_data->op_attr.ia_valid;
1833 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1834 rc = simple_setattr(dentry, &op_data->op_attr);
1835 op_data->op_attr.ia_valid = ia_valid;
1837 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1838 CERROR("md_setattr fails: rc = %d\n", rc);
1843 rc = md_get_lustre_md(sbi->ll_md_exp, &request->rq_pill, sbi->ll_dt_exp,
1844 sbi->ll_md_exp, &md);
1846 ptlrpc_req_finished(request);
1850 ia_valid = op_data->op_attr.ia_valid;
1851 /* inode size will be in ll_setattr_ost, can't do it now since dirty
1852 * cache is not cleared yet. */
1853 op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1854 if (S_ISREG(inode->i_mode))
1856 rc = simple_setattr(dentry, &op_data->op_attr);
1857 if (S_ISREG(inode->i_mode))
1858 inode_unlock(inode);
1859 op_data->op_attr.ia_valid = ia_valid;
1861 rc = ll_update_inode(inode, &md);
1862 ptlrpc_req_finished(request);
1868 * Zero portion of page that is part of @inode.
1869 * This implies, if necessary:
1870 * - taking cl_lock on range corresponding to concerned page
1871 * - grabbing vm page
1872 * - associating cl_page
1873 * - proceeding to clio read
1874 * - zeroing range in page
1875 * - proceeding to cl_page flush
1876 * - releasing cl_lock
1878 * \param[in] inode inode
1879 * \param[in] index page index
1880 * \param[in] offset offset in page to start zero from
1881 * \param[in] len len to zero
1883 * \retval 0 on success
1884 * \retval negative errno on failure
1886 int ll_io_zero_page(struct inode *inode, pgoff_t index, pgoff_t offset,
1889 struct ll_inode_info *lli = ll_i2info(inode);
1890 struct cl_object *clob = lli->lli_clob;
1892 struct lu_env *env = NULL;
1893 struct cl_io *io = NULL;
1894 struct cl_page *clpage = NULL;
1895 struct page *vmpage = NULL;
1896 unsigned from = index << PAGE_SHIFT;
1897 struct cl_lock *lock = NULL;
1898 struct cl_lock_descr *descr = NULL;
1899 struct cl_2queue *queue = NULL;
1900 struct cl_sync_io *anchor = NULL;
1901 bool holdinglock = false;
1902 bool lockedbymyself = true;
1907 env = cl_env_get(&refcheck);
1909 RETURN(PTR_ERR(env));
1911 io = vvp_env_thread_io(env);
1913 rc = cl_io_rw_init(env, io, CIT_WRITE, from, PAGE_SIZE);
1917 lock = vvp_env_lock(env);
1918 descr = &lock->cll_descr;
1919 descr->cld_obj = io->ci_obj;
1920 descr->cld_start = cl_index(io->ci_obj, from);
1921 descr->cld_end = cl_index(io->ci_obj, from + PAGE_SIZE - 1);
1922 descr->cld_mode = CLM_WRITE;
1923 descr->cld_enq_flags = CEF_MUST | CEF_NONBLOCK;
1925 /* request lock for page */
1926 rc = cl_lock_request(env, io, lock);
1927 /* -ECANCELED indicates a matching lock with a different extent
1928 * was already present, and -EEXIST indicates a matching lock
1929 * on exactly the same extent was already present.
1930 * In both cases it means we are covered.
1932 if (rc == -ECANCELED || rc == -EEXIST)
1940 vmpage = grab_cache_page_nowait(inode->i_mapping, index);
1942 GOTO(rellock, rc = -EOPNOTSUPP);
1944 if (!PageDirty(vmpage)) {
1945 /* associate cl_page */
1946 clpage = cl_page_find(env, clob, vmpage->index,
1947 vmpage, CPT_CACHEABLE);
1949 GOTO(pagefini, rc = PTR_ERR(clpage));
1951 cl_page_assume(env, io, clpage);
1954 if (!PageUptodate(vmpage) && !PageDirty(vmpage) &&
1955 !PageWriteback(vmpage)) {
1957 /* set PagePrivate2 to detect special case of empty page
1958 * in osc_brw_fini_request()
1960 SetPagePrivate2(vmpage);
1961 rc = ll_io_read_page(env, io, clpage, NULL);
1962 if (!PagePrivate2(vmpage))
1963 /* PagePrivate2 was cleared in osc_brw_fini_request()
1964 * meaning we read an empty page. In this case, in order
1965 * to avoid allocating unnecessary block in truncated
1966 * file, we must not zero and write as below. Subsequent
1967 * server-side truncate will handle things correctly.
1969 GOTO(clpfini, rc = 0);
1970 ClearPagePrivate2(vmpage);
1973 lockedbymyself = trylock_page(vmpage);
1974 cl_page_assume(env, io, clpage);
1977 /* zero range in page */
1978 zero_user(vmpage, offset, len);
1980 if (holdinglock && clpage) {
1981 /* explicitly write newly modified page */
1982 queue = &io->ci_queue;
1983 cl_2queue_init(queue);
1984 anchor = &vvp_env_info(env)->vti_anchor;
1985 cl_sync_io_init(anchor, 1);
1986 clpage->cp_sync_io = anchor;
1987 cl_2queue_add(queue, clpage, true);
1988 rc = cl_io_submit_rw(env, io, CRT_WRITE, queue);
1990 GOTO(queuefini1, rc);
1991 rc = cl_sync_io_wait(env, anchor, 0);
1993 GOTO(queuefini2, rc);
1994 cl_page_assume(env, io, clpage);
1997 cl_2queue_discard(env, io, queue);
1999 cl_2queue_disown(env, io, queue);
2000 cl_2queue_fini(env, queue);
2005 cl_page_put(env, clpage);
2007 if (lockedbymyself) {
2008 unlock_page(vmpage);
2013 cl_lock_release(env, lock);
2015 cl_io_fini(env, io);
2018 cl_env_put(env, &refcheck);
2023 /* If this inode has objects allocated to it (lsm != NULL), then the OST
2024 * object(s) determine the file size and mtime. Otherwise, the MDS will
2025 * keep these values until such a time that objects are allocated for it.
2026 * We do the MDS operations first, as it is checking permissions for us.
2027 * We don't to the MDS RPC if there is nothing that we want to store there,
2028 * otherwise there is no harm in updating mtime/atime on the MDS if we are
2029 * going to do an RPC anyways.
2031 * If we are doing a truncate, we will send the mtime and ctime updates
2032 * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
2033 * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
2036 * In case of HSMimport, we only set attr on MDS.
2038 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr,
2039 enum op_xvalid xvalid, bool hsm_import)
2041 struct inode *inode = dentry->d_inode;
2042 struct ll_inode_info *lli = ll_i2info(inode);
2043 struct md_op_data *op_data = NULL;
2044 ktime_t kstart = ktime_get();
2049 CDEBUG(D_VFSTRACE, "%s: setattr inode "DFID"(%p) from %llu to %llu, "
2050 "valid %x, hsm_import %d\n",
2051 ll_i2sbi(inode)->ll_fsname, PFID(&lli->lli_fid),
2052 inode, i_size_read(inode), attr->ia_size, attr->ia_valid,
2055 if (attr->ia_valid & ATTR_SIZE) {
2056 /* Check new size against VFS/VM file size limit and rlimit */
2057 rc = inode_newsize_ok(inode, attr->ia_size);
2061 /* The maximum Lustre file size is variable, based on the
2062 * OST maximum object size and number of stripes. This
2063 * needs another check in addition to the VFS check above. */
2064 if (attr->ia_size > ll_file_maxbytes(inode)) {
2065 CDEBUG(D_INODE,"file "DFID" too large %llu > %llu\n",
2066 PFID(&lli->lli_fid), attr->ia_size,
2067 ll_file_maxbytes(inode));
2071 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
2074 /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
2075 if (attr->ia_valid & TIMES_SET_FLAGS) {
2076 if ((!uid_eq(current_fsuid(), inode->i_uid)) &&
2077 !capable(CAP_FOWNER))
2081 /* We mark all of the fields "set" so MDS/OST does not re-set them */
2082 if (!(xvalid & OP_XVALID_CTIME_SET) &&
2083 (attr->ia_valid & ATTR_CTIME)) {
2084 attr->ia_ctime = current_time(inode);
2085 xvalid |= OP_XVALID_CTIME_SET;
2087 if (!(attr->ia_valid & ATTR_ATIME_SET) &&
2088 (attr->ia_valid & ATTR_ATIME)) {
2089 attr->ia_atime = current_time(inode);
2090 attr->ia_valid |= ATTR_ATIME_SET;
2092 if (!(attr->ia_valid & ATTR_MTIME_SET) &&
2093 (attr->ia_valid & ATTR_MTIME)) {
2094 attr->ia_mtime = current_time(inode);
2095 attr->ia_valid |= ATTR_MTIME_SET;
2098 if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
2099 CDEBUG(D_INODE, "setting mtime %lld, ctime %lld, now = %lld\n",
2100 (s64)attr->ia_mtime.tv_sec, (s64)attr->ia_ctime.tv_sec,
2101 ktime_get_real_seconds());
2103 if (S_ISREG(inode->i_mode))
2104 inode_unlock(inode);
2106 /* We always do an MDS RPC, even if we're only changing the size;
2107 * only the MDS knows whether truncate() should fail with -ETXTBUSY */
2109 OBD_ALLOC_PTR(op_data);
2110 if (op_data == NULL)
2111 GOTO(out, rc = -ENOMEM);
2113 if (!hsm_import && attr->ia_valid & ATTR_SIZE) {
2114 /* If we are changing file size, file content is
2115 * modified, flag it.
2117 xvalid |= OP_XVALID_OWNEROVERRIDE;
2118 op_data->op_bias |= MDS_DATA_MODIFIED;
2119 clear_bit(LLIF_DATA_MODIFIED, &lli->lli_flags);
2122 if (attr->ia_valid & ATTR_FILE) {
2123 struct ll_file_data *fd = attr->ia_file->private_data;
2125 if (fd->fd_lease_och)
2126 op_data->op_bias |= MDS_TRUNC_KEEP_LEASE;
2129 op_data->op_attr = *attr;
2130 op_data->op_xvalid = xvalid;
2132 rc = ll_md_setattr(dentry, op_data);
2136 if (!S_ISREG(inode->i_mode) || hsm_import)
2139 if (attr->ia_valid & (ATTR_SIZE | ATTR_ATIME | ATTR_ATIME_SET |
2140 ATTR_MTIME | ATTR_MTIME_SET | ATTR_CTIME) ||
2141 xvalid & OP_XVALID_CTIME_SET) {
2142 bool cached = false;
2144 rc = pcc_inode_setattr(inode, attr, &cached);
2147 CERROR("%s: PCC inode "DFID" setattr failed: "
2149 ll_i2sbi(inode)->ll_fsname,
2150 PFID(&lli->lli_fid), rc);
2154 unsigned int flags = 0;
2156 /* For truncate and utimes sending attributes to OSTs,
2157 * setting mtime/atime to the past will be performed
2158 * under PW [0:EOF] extent lock (new_size:EOF for
2159 * truncate). It may seem excessive to send mtime/atime
2160 * updates to OSTs when not setting times to past, but
2161 * it is necessary due to possible time
2162 * de-synchronization between MDT inode and OST objects
2164 if (S_ISREG(inode->i_mode) && IS_ENCRYPTED(inode)) {
2165 xvalid |= OP_XVALID_FLAGS;
2166 flags = LUSTRE_ENCRYPT_FL;
2167 /* Call to ll_io_zero_page is not necessary if
2168 * truncating on PAGE_SIZE boundary, because
2169 * whole pages will be wiped.
2170 * In case of Direct IO, all we need is to set
2173 if (attr->ia_valid & ATTR_SIZE &&
2174 attr->ia_size & ~PAGE_MASK &&
2175 !(attr->ia_valid & ATTR_FILE &&
2176 attr->ia_file->f_flags & O_DIRECT)) {
2178 attr->ia_size & (PAGE_SIZE - 1);
2180 rc = ll_io_zero_page(inode,
2181 attr->ia_size >> PAGE_SHIFT,
2182 offset, PAGE_SIZE - offset);
2187 rc = cl_setattr_ost(lli->lli_clob, attr, xvalid, flags);
2191 /* If the file was restored, it needs to set dirty flag.
2193 * We've already sent MDS_DATA_MODIFIED flag in
2194 * ll_md_setattr() for truncate. However, the MDT refuses to
2195 * set the HS_DIRTY flag on released files, so we have to set
2196 * it again if the file has been restored. Please check how
2197 * LLIF_DATA_MODIFIED is set in vvp_io_setattr_fini().
2199 * Please notice that if the file is not released, the previous
2200 * MDS_DATA_MODIFIED has taken effect and usually
2201 * LLIF_DATA_MODIFIED is not set(see vvp_io_setattr_fini()).
2202 * This way we can save an RPC for common open + trunc
2204 if (test_and_clear_bit(LLIF_DATA_MODIFIED, &lli->lli_flags)) {
2205 struct hsm_state_set hss = {
2206 .hss_valid = HSS_SETMASK,
2207 .hss_setmask = HS_DIRTY,
2211 rc2 = ll_hsm_state_set(inode, &hss);
2212 /* truncate and write can happen at the same time, so that
2213 * the file can be set modified even though the file is not
2214 * restored from released state, and ll_hsm_state_set() is
2215 * not applicable for the file, and rc2 < 0 is normal in this
2218 CDEBUG(D_INFO, DFID "HSM set dirty failed: rc2 = %d\n",
2219 PFID(ll_inode2fid(inode)), rc2);
2224 if (op_data != NULL)
2225 ll_finish_md_op_data(op_data);
2227 if (S_ISREG(inode->i_mode)) {
2229 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
2230 inode_dio_wait(inode);
2231 /* Once we've got the i_mutex, it's safe to set the S_NOSEC
2232 * flag. ll_update_inode (called from ll_md_setattr), clears
2233 * inode flags, so there is a gap where S_NOSEC is not set.
2234 * This can cause a writer to take the i_mutex unnecessarily,
2235 * but this is safe to do and should be rare. */
2236 inode_has_no_xattr(inode);
2240 ll_stats_ops_tally(ll_i2sbi(inode), attr->ia_valid & ATTR_SIZE ?
2241 LPROC_LL_TRUNC : LPROC_LL_SETATTR,
2242 ktime_us_delta(ktime_get(), kstart));
2247 int ll_setattr(struct dentry *de, struct iattr *attr)
2249 int mode = de->d_inode->i_mode;
2250 enum op_xvalid xvalid = 0;
2253 rc = llcrypt_prepare_setattr(de, attr);
2257 if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
2258 (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
2259 xvalid |= OP_XVALID_OWNEROVERRIDE;
2261 if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
2262 (ATTR_SIZE|ATTR_MODE)) &&
2263 (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
2264 (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
2265 !(attr->ia_mode & S_ISGID))))
2266 attr->ia_valid |= ATTR_FORCE;
2268 if ((attr->ia_valid & ATTR_MODE) &&
2270 !(attr->ia_mode & S_ISUID) &&
2271 !(attr->ia_valid & ATTR_KILL_SUID))
2272 attr->ia_valid |= ATTR_KILL_SUID;
2274 if ((attr->ia_valid & ATTR_MODE) &&
2275 ((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
2276 !(attr->ia_mode & S_ISGID) &&
2277 !(attr->ia_valid & ATTR_KILL_SGID))
2278 attr->ia_valid |= ATTR_KILL_SGID;
2280 return ll_setattr_raw(de, attr, xvalid, false);
2283 int ll_statfs_internal(struct ll_sb_info *sbi, struct obd_statfs *osfs,
2286 struct obd_statfs obd_osfs = { 0 };
2291 max_age = ktime_get_seconds() - sbi->ll_statfs_max_age;
2293 if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2294 flags |= OBD_STATFS_NODELAY;
2296 rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
2300 osfs->os_type = LL_SUPER_MAGIC;
2302 CDEBUG(D_SUPER, "MDC blocks %llu/%llu objects %llu/%llu\n",
2303 osfs->os_bavail, osfs->os_blocks, osfs->os_ffree, osfs->os_files);
2305 if (osfs->os_state & OS_STATFS_SUM)
2308 rc = obd_statfs(NULL, sbi->ll_dt_exp, &obd_osfs, max_age, flags);
2309 if (rc) /* Possibly a filesystem with no OSTs. Report MDT totals. */
2312 CDEBUG(D_SUPER, "OSC blocks %llu/%llu objects %llu/%llu\n",
2313 obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
2316 osfs->os_bsize = obd_osfs.os_bsize;
2317 osfs->os_blocks = obd_osfs.os_blocks;
2318 osfs->os_bfree = obd_osfs.os_bfree;
2319 osfs->os_bavail = obd_osfs.os_bavail;
2321 /* If we have _some_ OSTs, but don't have as many free objects on the
2322 * OSTs as inodes on the MDTs, reduce the reported number of inodes
2323 * to compensate, so that the "inodes in use" number is correct.
2324 * This should be kept in sync with lod_statfs() behaviour.
2326 if (obd_osfs.os_files && obd_osfs.os_ffree < osfs->os_ffree) {
2327 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
2329 osfs->os_ffree = obd_osfs.os_ffree;
2336 static int ll_statfs_project(struct inode *inode, struct kstatfs *sfs)
2338 struct if_quotactl qctl = {
2339 .qc_cmd = LUSTRE_Q_GETQUOTA,
2340 .qc_type = PRJQUOTA,
2341 .qc_valid = QC_GENERAL,
2343 u64 limit, curblock;
2346 qctl.qc_id = ll_i2info(inode)->lli_projid;
2347 ret = quotactl_ioctl(inode->i_sb, &qctl);
2349 /* ignore errors if project ID does not have
2350 * a quota limit or feature unsupported.
2352 if (ret == -ESRCH || ret == -EOPNOTSUPP)
2357 limit = ((qctl.qc_dqblk.dqb_bsoftlimit ?
2358 qctl.qc_dqblk.dqb_bsoftlimit :
2359 qctl.qc_dqblk.dqb_bhardlimit) * 1024) / sfs->f_bsize;
2360 if (limit && sfs->f_blocks > limit) {
2361 curblock = (qctl.qc_dqblk.dqb_curspace +
2362 sfs->f_bsize - 1) / sfs->f_bsize;
2363 sfs->f_blocks = limit;
2364 sfs->f_bfree = sfs->f_bavail =
2365 (sfs->f_blocks > curblock) ?
2366 (sfs->f_blocks - curblock) : 0;
2369 limit = qctl.qc_dqblk.dqb_isoftlimit ?
2370 qctl.qc_dqblk.dqb_isoftlimit :
2371 qctl.qc_dqblk.dqb_ihardlimit;
2372 if (limit && sfs->f_files > limit) {
2373 sfs->f_files = limit;
2374 sfs->f_ffree = (sfs->f_files >
2375 qctl.qc_dqblk.dqb_curinodes) ?
2376 (sfs->f_files - qctl.qc_dqblk.dqb_curinodes) : 0;
2382 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
2384 struct super_block *sb = de->d_sb;
2385 struct obd_statfs osfs;
2386 __u64 fsid = huge_encode_dev(sb->s_dev);
2387 ktime_t kstart = ktime_get();
2390 CDEBUG(D_VFSTRACE, "VFS Op:sb=%s (%p)\n", sb->s_id, sb);
2392 /* Some amount of caching on the client is allowed */
2393 rc = ll_statfs_internal(ll_s2sbi(sb), &osfs, OBD_STATFS_SUM);
2397 statfs_unpack(sfs, &osfs);
2399 /* We need to downshift for all 32-bit kernels, because we can't
2400 * tell if the kernel is being called via sys_statfs64() or not.
2401 * Stop before overflowing f_bsize - in which case it is better
2402 * to just risk EOVERFLOW if caller is using old sys_statfs(). */
2403 if (sizeof(long) < 8) {
2404 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
2407 osfs.os_blocks >>= 1;
2408 osfs.os_bfree >>= 1;
2409 osfs.os_bavail >>= 1;
2413 sfs->f_blocks = osfs.os_blocks;
2414 sfs->f_bfree = osfs.os_bfree;
2415 sfs->f_bavail = osfs.os_bavail;
2416 sfs->f_fsid.val[0] = (__u32)fsid;
2417 sfs->f_fsid.val[1] = (__u32)(fsid >> 32);
2418 if (ll_i2info(de->d_inode)->lli_projid)
2419 return ll_statfs_project(de->d_inode, sfs);
2421 ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STATFS,
2422 ktime_us_delta(ktime_get(), kstart));
2427 void ll_inode_size_lock(struct inode *inode)
2429 struct ll_inode_info *lli;
2431 LASSERT(!S_ISDIR(inode->i_mode));
2433 lli = ll_i2info(inode);
2434 mutex_lock(&lli->lli_size_mutex);
2437 void ll_inode_size_unlock(struct inode *inode)
2439 struct ll_inode_info *lli;
2441 lli = ll_i2info(inode);
2442 mutex_unlock(&lli->lli_size_mutex);
2445 void ll_update_inode_flags(struct inode *inode, unsigned int ext_flags)
2447 /* do not clear encryption flag */
2448 ext_flags |= ll_inode_to_ext_flags(inode->i_flags) & LUSTRE_ENCRYPT_FL;
2449 inode->i_flags = ll_ext_to_inode_flags(ext_flags);
2450 if (ext_flags & LUSTRE_PROJINHERIT_FL)
2451 set_bit(LLIF_PROJECT_INHERIT, &ll_i2info(inode)->lli_flags);
2453 clear_bit(LLIF_PROJECT_INHERIT, &ll_i2info(inode)->lli_flags);
2456 int ll_update_inode(struct inode *inode, struct lustre_md *md)
2458 struct ll_inode_info *lli = ll_i2info(inode);
2459 struct mdt_body *body = md->body;
2460 struct ll_sb_info *sbi = ll_i2sbi(inode);
2463 if (body->mbo_valid & OBD_MD_FLEASIZE) {
2464 rc = cl_file_inode_init(inode, md);
2469 if (S_ISDIR(inode->i_mode)) {
2470 rc = ll_update_lsm_md(inode, md);
2475 if (body->mbo_valid & OBD_MD_FLACL)
2476 lli_replace_acl(lli, md);
2478 inode->i_ino = cl_fid_build_ino(&body->mbo_fid1,
2479 sbi->ll_flags & LL_SBI_32BIT_API);
2480 inode->i_generation = cl_fid_build_gen(&body->mbo_fid1);
2482 if (body->mbo_valid & OBD_MD_FLATIME) {
2483 if (body->mbo_atime > inode->i_atime.tv_sec)
2484 inode->i_atime.tv_sec = body->mbo_atime;
2485 lli->lli_atime = body->mbo_atime;
2488 if (body->mbo_valid & OBD_MD_FLMTIME) {
2489 if (body->mbo_mtime > inode->i_mtime.tv_sec) {
2491 "setting ino %lu mtime from %lld to %llu\n",
2492 inode->i_ino, (s64)inode->i_mtime.tv_sec,
2494 inode->i_mtime.tv_sec = body->mbo_mtime;
2496 lli->lli_mtime = body->mbo_mtime;
2499 if (body->mbo_valid & OBD_MD_FLCTIME) {
2500 if (body->mbo_ctime > inode->i_ctime.tv_sec)
2501 inode->i_ctime.tv_sec = body->mbo_ctime;
2502 lli->lli_ctime = body->mbo_ctime;
2505 if (body->mbo_valid & OBD_MD_FLBTIME)
2506 lli->lli_btime = body->mbo_btime;
2508 /* Clear i_flags to remove S_NOSEC before permissions are updated */
2509 if (body->mbo_valid & OBD_MD_FLFLAGS)
2510 ll_update_inode_flags(inode, body->mbo_flags);
2511 if (body->mbo_valid & OBD_MD_FLMODE)
2512 inode->i_mode = (inode->i_mode & S_IFMT) |
2513 (body->mbo_mode & ~S_IFMT);
2515 if (body->mbo_valid & OBD_MD_FLTYPE)
2516 inode->i_mode = (inode->i_mode & ~S_IFMT) |
2517 (body->mbo_mode & S_IFMT);
2519 LASSERT(inode->i_mode != 0);
2520 if (body->mbo_valid & OBD_MD_FLUID)
2521 inode->i_uid = make_kuid(&init_user_ns, body->mbo_uid);
2522 if (body->mbo_valid & OBD_MD_FLGID)
2523 inode->i_gid = make_kgid(&init_user_ns, body->mbo_gid);
2524 if (body->mbo_valid & OBD_MD_FLPROJID)
2525 lli->lli_projid = body->mbo_projid;
2526 if (body->mbo_valid & OBD_MD_FLNLINK)
2527 set_nlink(inode, body->mbo_nlink);
2528 if (body->mbo_valid & OBD_MD_FLRDEV)
2529 inode->i_rdev = old_decode_dev(body->mbo_rdev);
2531 if (body->mbo_valid & OBD_MD_FLID) {
2532 /* FID shouldn't be changed! */
2533 if (fid_is_sane(&lli->lli_fid)) {
2534 LASSERTF(lu_fid_eq(&lli->lli_fid, &body->mbo_fid1),
2535 "Trying to change FID "DFID
2536 " to the "DFID", inode "DFID"(%p)\n",
2537 PFID(&lli->lli_fid), PFID(&body->mbo_fid1),
2538 PFID(ll_inode2fid(inode)), inode);
2540 lli->lli_fid = body->mbo_fid1;
2544 LASSERT(fid_seq(&lli->lli_fid) != 0);
2546 lli->lli_attr_valid = body->mbo_valid;
2547 if (body->mbo_valid & OBD_MD_FLSIZE) {
2548 i_size_write(inode, body->mbo_size);
2550 CDEBUG(D_VFSTRACE, "inode="DFID", updating i_size %llu\n",
2551 PFID(ll_inode2fid(inode)),
2552 (unsigned long long)body->mbo_size);
2554 if (body->mbo_valid & OBD_MD_FLBLOCKS)
2555 inode->i_blocks = body->mbo_blocks;
2557 if (body->mbo_valid & OBD_MD_FLLAZYSIZE)
2558 lli->lli_lazysize = body->mbo_size;
2559 if (body->mbo_valid & OBD_MD_FLLAZYBLOCKS)
2560 lli->lli_lazyblocks = body->mbo_blocks;
2563 if (body->mbo_valid & OBD_MD_TSTATE) {
2564 /* Set LLIF_FILE_RESTORING if restore ongoing and
2565 * clear it when done to ensure to start again
2566 * glimpsing updated attrs
2568 if (body->mbo_t_state & MS_RESTORE)
2569 set_bit(LLIF_FILE_RESTORING, &lli->lli_flags);
2571 clear_bit(LLIF_FILE_RESTORING, &lli->lli_flags);
2577 /* update directory depth to ROOT, called after LOOKUP lock is fetched. */
2578 void ll_update_dir_depth(struct inode *dir, struct inode *inode)
2580 struct ll_inode_info *lli;
2582 if (!S_ISDIR(inode->i_mode))
2588 lli = ll_i2info(inode);
2589 lli->lli_depth = ll_i2info(dir)->lli_depth + 1;
2590 CDEBUG(D_INODE, DFID" depth %hu\n", PFID(&lli->lli_fid), lli->lli_depth);
2593 void ll_truncate_inode_pages_final(struct inode *inode)
2595 struct address_space *mapping = &inode->i_data;
2596 unsigned long nrpages;
2597 unsigned long flags;
2599 truncate_inode_pages_final(mapping);
2601 /* Workaround for LU-118: Note nrpages may not be totally updated when
2602 * truncate_inode_pages() returns, as there can be a page in the process
2603 * of deletion (inside __delete_from_page_cache()) in the specified
2604 * range. Thus mapping->nrpages can be non-zero when this function
2605 * returns even after truncation of the whole mapping. Only do this if
2606 * npages isn't already zero.
2608 nrpages = mapping->nrpages;
2610 ll_xa_lock_irqsave(&mapping->i_pages, flags);
2611 nrpages = mapping->nrpages;
2612 ll_xa_unlock_irqrestore(&mapping->i_pages, flags);
2613 } /* Workaround end */
2615 LASSERTF(nrpages == 0, "%s: inode="DFID"(%p) nrpages=%lu, "
2616 "see https://jira.whamcloud.com/browse/LU-118\n",
2617 ll_i2sbi(inode)->ll_fsname,
2618 PFID(ll_inode2fid(inode)), inode, nrpages);
2621 int ll_read_inode2(struct inode *inode, void *opaque)
2623 struct lustre_md *md = opaque;
2624 struct ll_inode_info *lli = ll_i2info(inode);
2628 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
2629 PFID(&lli->lli_fid), inode);
2631 /* Core attributes from the MDS first. This is a new inode, and
2632 * the VFS doesn't zero times in the core inode so we have to do
2633 * it ourselves. They will be overwritten by either MDS or OST
2634 * attributes - we just need to make sure they aren't newer.
2636 inode->i_mtime.tv_sec = 0;
2637 inode->i_atime.tv_sec = 0;
2638 inode->i_ctime.tv_sec = 0;
2640 rc = ll_update_inode(inode, md);
2644 /* OIDEBUG(inode); */
2646 #ifdef HAVE_BACKING_DEV_INFO
2647 /* initializing backing dev info. */
2648 inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
2650 if (S_ISREG(inode->i_mode)) {
2651 struct ll_sb_info *sbi = ll_i2sbi(inode);
2652 inode->i_op = &ll_file_inode_operations;
2653 inode->i_fop = sbi->ll_fop;
2654 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
2656 } else if (S_ISDIR(inode->i_mode)) {
2657 inode->i_op = &ll_dir_inode_operations;
2658 inode->i_fop = &ll_dir_operations;
2660 } else if (S_ISLNK(inode->i_mode)) {
2661 inode->i_op = &ll_fast_symlink_inode_operations;
2664 inode->i_op = &ll_special_inode_operations;
2666 init_special_inode(inode, inode->i_mode,
2675 void ll_delete_inode(struct inode *inode)
2677 struct ll_inode_info *lli = ll_i2info(inode);
2680 if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL) {
2681 /* It is last chance to write out dirty pages,
2682 * otherwise we may lose data while umount.
2684 * If i_nlink is 0 then just discard data. This is safe because
2685 * local inode gets i_nlink 0 from server only for the last
2686 * unlink, so that file is not opened somewhere else
2688 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF, inode->i_nlink ?
2689 CL_FSYNC_LOCAL : CL_FSYNC_DISCARD, 1);
2692 ll_truncate_inode_pages_final(inode);
2693 ll_clear_inode(inode);
2699 int ll_iocontrol(struct inode *inode, struct file *file,
2700 unsigned int cmd, unsigned long arg)
2702 struct ll_sb_info *sbi = ll_i2sbi(inode);
2703 struct ptlrpc_request *req = NULL;
2708 case FS_IOC_GETFLAGS: {
2709 struct mdt_body *body;
2710 struct md_op_data *op_data;
2712 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
2713 0, 0, LUSTRE_OPC_ANY,
2715 if (IS_ERR(op_data))
2716 RETURN(PTR_ERR(op_data));
2718 op_data->op_valid = OBD_MD_FLFLAGS;
2719 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
2720 ll_finish_md_op_data(op_data);
2722 CERROR("%s: failure inode "DFID": rc = %d\n",
2723 sbi->ll_md_exp->exp_obd->obd_name,
2724 PFID(ll_inode2fid(inode)), rc);
2728 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
2730 flags = body->mbo_flags;
2732 ptlrpc_req_finished(req);
2734 RETURN(put_user(flags, (int __user *)arg));
2736 case FS_IOC_SETFLAGS: {
2738 struct md_op_data *op_data;
2739 struct cl_object *obj;
2740 struct fsxattr fa = { 0 };
2742 if (get_user(flags, (int __user *)arg))
2745 fa.fsx_projid = ll_i2info(inode)->lli_projid;
2746 if (flags & LUSTRE_PROJINHERIT_FL)
2747 fa.fsx_xflags = FS_XFLAG_PROJINHERIT;
2749 rc = ll_ioctl_check_project(inode, fa.fsx_xflags,
2754 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
2755 LUSTRE_OPC_ANY, NULL);
2756 if (IS_ERR(op_data))
2757 RETURN(PTR_ERR(op_data));
2759 op_data->op_attr_flags = flags;
2760 op_data->op_xvalid |= OP_XVALID_FLAGS;
2761 rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &req);
2762 ll_finish_md_op_data(op_data);
2763 ptlrpc_req_finished(req);
2767 ll_update_inode_flags(inode, flags);
2769 obj = ll_i2info(inode)->lli_clob;
2773 OBD_ALLOC_PTR(attr);
2777 rc = cl_setattr_ost(obj, attr, OP_XVALID_FLAGS, flags);
2789 int ll_flush_ctx(struct inode *inode)
2791 struct ll_sb_info *sbi = ll_i2sbi(inode);
2793 CDEBUG(D_SEC, "flush context for user %d\n",
2794 from_kuid(&init_user_ns, current_uid()));
2796 obd_set_info_async(NULL, sbi->ll_md_exp,
2797 sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2799 obd_set_info_async(NULL, sbi->ll_dt_exp,
2800 sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2805 /* umount -f client means force down, don't save state */
2806 void ll_umount_begin(struct super_block *sb)
2808 struct ll_sb_info *sbi = ll_s2sbi(sb);
2809 struct obd_device *obd;
2810 struct obd_ioctl_data *ioc_data;
2814 CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2815 sb->s_count, atomic_read(&sb->s_active));
2817 obd = class_exp2obd(sbi->ll_md_exp);
2819 CERROR("Invalid MDC connection handle %#llx\n",
2820 sbi->ll_md_exp->exp_handle.h_cookie);
2826 obd = class_exp2obd(sbi->ll_dt_exp);
2828 CERROR("Invalid LOV connection handle %#llx\n",
2829 sbi->ll_dt_exp->exp_handle.h_cookie);
2835 OBD_ALLOC_PTR(ioc_data);
2837 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2838 sizeof *ioc_data, ioc_data, NULL);
2840 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2841 sizeof *ioc_data, ioc_data, NULL);
2843 OBD_FREE_PTR(ioc_data);
2846 /* Really, we'd like to wait until there are no requests outstanding,
2847 * and then continue. For now, we just periodically checking for vfs
2848 * to decrement mnt_cnt and hope to finish it within 10sec.
2852 !may_umount(sbi->ll_mnt.mnt)) {
2860 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2862 struct ll_sb_info *sbi = ll_s2sbi(sb);
2863 char *profilenm = get_profile_name(sb);
2867 if ((*flags & MS_RDONLY) != (sb->s_flags & SB_RDONLY)) {
2868 read_only = *flags & MS_RDONLY;
2869 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2870 sizeof(KEY_READ_ONLY),
2871 KEY_READ_ONLY, sizeof(read_only),
2874 LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2875 profilenm, read_only ?
2876 "read-only" : "read-write", err);
2881 sb->s_flags |= SB_RDONLY;
2883 sb->s_flags &= ~SB_RDONLY;
2885 if (sbi->ll_flags & LL_SBI_VERBOSE)
2886 LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2887 read_only ? "read-only" : "read-write");
2893 * Cleanup the open handle that is cached on MDT-side.
2895 * For open case, the client side open handling thread may hit error
2896 * after the MDT grant the open. Under such case, the client should
2897 * send close RPC to the MDT as cleanup; otherwise, the open handle
2898 * on the MDT will be leaked there until the client umount or evicted.
2900 * In further, if someone unlinked the file, because the open handle
2901 * holds the reference on such file/object, then it will block the
2902 * subsequent threads that want to locate such object via FID.
2904 * \param[in] sb super block for this file-system
2905 * \param[in] open_req pointer to the original open request
2907 void ll_open_cleanup(struct super_block *sb, struct req_capsule *pill)
2909 struct mdt_body *body;
2910 struct md_op_data *op_data;
2911 struct ptlrpc_request *close_req = NULL;
2912 struct obd_export *exp = ll_s2sbi(sb)->ll_md_exp;
2915 body = req_capsule_server_get(pill, &RMF_MDT_BODY);
2916 OBD_ALLOC_PTR(op_data);
2917 if (op_data == NULL) {
2918 CWARN("%s: cannot allocate op_data to release open handle for "
2919 DFID"\n", ll_s2sbi(sb)->ll_fsname, PFID(&body->mbo_fid1));
2924 op_data->op_fid1 = body->mbo_fid1;
2925 op_data->op_open_handle = body->mbo_open_handle;
2926 op_data->op_mod_time = ktime_get_real_seconds();
2927 md_close(exp, op_data, NULL, &close_req);
2928 ptlrpc_req_finished(close_req);
2929 ll_finish_md_op_data(op_data);
2934 int ll_prep_inode(struct inode **inode, struct req_capsule *pill,
2935 struct super_block *sb, struct lookup_intent *it)
2937 struct ll_sb_info *sbi = NULL;
2938 struct lustre_md md = { NULL };
2939 bool default_lmv_deleted = false;
2944 LASSERT(*inode || sb);
2945 sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2946 rc = md_get_lustre_md(sbi->ll_md_exp, pill, sbi->ll_dt_exp,
2947 sbi->ll_md_exp, &md);
2952 * clear default_lmv only if intent_getattr reply doesn't contain it.
2953 * but it needs to be done after iget, check this early because
2954 * ll_update_lsm_md() may change md.
2956 if (it && (it->it_op & (IT_LOOKUP | IT_GETATTR)) &&
2957 S_ISDIR(md.body->mbo_mode) && !md.default_lmv)
2958 default_lmv_deleted = true;
2961 rc = ll_update_inode(*inode, &md);
2965 LASSERT(sb != NULL);
2968 * At this point server returns to client's same fid as client
2969 * generated for creating. So using ->fid1 is okay here.
2971 if (!fid_is_sane(&md.body->mbo_fid1)) {
2972 CERROR("%s: Fid is insane "DFID"\n",
2974 PFID(&md.body->mbo_fid1));
2975 GOTO(out, rc = -EINVAL);
2978 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->mbo_fid1,
2979 sbi->ll_flags & LL_SBI_32BIT_API),
2981 if (IS_ERR(*inode)) {
2983 rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2985 CERROR("new_inode -fatal: rc %d\n", rc);
2990 /* Handling piggyback layout lock.
2991 * Layout lock can be piggybacked by getattr and open request.
2992 * The lsm can be applied to inode only if it comes with a layout lock
2993 * otherwise correct layout may be overwritten, for example:
2994 * 1. proc1: mdt returns a lsm but not granting layout
2995 * 2. layout was changed by another client
2996 * 3. proc2: refresh layout and layout lock granted
2997 * 4. proc1: to apply a stale layout */
2998 if (it != NULL && it->it_lock_mode != 0) {
2999 struct lustre_handle lockh;
3000 struct ldlm_lock *lock;
3002 lockh.cookie = it->it_lock_handle;
3003 lock = ldlm_handle2lock(&lockh);
3004 LASSERT(lock != NULL);
3005 if (ldlm_has_layout(lock)) {
3006 struct cl_object_conf conf;
3008 memset(&conf, 0, sizeof(conf));
3009 conf.coc_opc = OBJECT_CONF_SET;
3010 conf.coc_inode = *inode;
3011 conf.coc_lock = lock;
3012 conf.u.coc_layout = md.layout;
3013 (void)ll_layout_conf(*inode, &conf);
3015 LDLM_LOCK_PUT(lock);
3018 if (default_lmv_deleted)
3019 ll_update_default_lsm_md(*inode, &md);
3021 /* we may want to apply some policy for foreign file/dir */
3022 if (ll_sbi_has_foreign_symlink(sbi)) {
3023 rc = ll_manage_foreign(*inode, &md);
3031 /* cleanup will be done if necessary */
3032 md_free_lustre_md(sbi->ll_md_exp, &md);
3034 if (rc != 0 && it != NULL && it->it_op & IT_OPEN) {
3035 ll_intent_drop_lock(it);
3036 ll_open_cleanup(sb != NULL ? sb : (*inode)->i_sb, pill);
3042 int ll_obd_statfs(struct inode *inode, void __user *arg)
3044 struct ll_sb_info *sbi = NULL;
3045 struct obd_export *exp;
3046 struct obd_ioctl_data *data = NULL;
3051 sbi = ll_i2sbi(inode);
3053 GOTO(out_statfs, rc = -EINVAL);
3055 rc = obd_ioctl_getdata(&data, &len, arg);
3057 GOTO(out_statfs, rc);
3059 if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
3060 !data->ioc_pbuf1 || !data->ioc_pbuf2)
3061 GOTO(out_statfs, rc = -EINVAL);
3063 if (data->ioc_inllen1 != sizeof(__u32) ||
3064 data->ioc_inllen2 != sizeof(__u32) ||
3065 data->ioc_plen1 != sizeof(struct obd_statfs) ||
3066 data->ioc_plen2 != sizeof(struct obd_uuid))
3067 GOTO(out_statfs, rc = -EINVAL);
3069 memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
3070 if (type & LL_STATFS_LMV)
3071 exp = sbi->ll_md_exp;
3072 else if (type & LL_STATFS_LOV)
3073 exp = sbi->ll_dt_exp;
3075 GOTO(out_statfs, rc = -ENODEV);
3077 rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, data, NULL);
3079 GOTO(out_statfs, rc);
3081 OBD_FREE_LARGE(data, len);
3086 * this is normally called in ll_fini_md_op_data(), but sometimes it needs to
3087 * be called early to avoid deadlock.
3089 void ll_unlock_md_op_lsm(struct md_op_data *op_data)
3091 if (op_data->op_mea2_sem) {
3092 up_read_non_owner(op_data->op_mea2_sem);
3093 op_data->op_mea2_sem = NULL;
3096 if (op_data->op_mea1_sem) {
3097 up_read_non_owner(op_data->op_mea1_sem);
3098 op_data->op_mea1_sem = NULL;
3102 /* this function prepares md_op_data hint for passing it down to MD stack. */
3103 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
3104 struct inode *i1, struct inode *i2,
3105 const char *name, size_t namelen,
3106 __u32 mode, enum md_op_code opc,
3109 struct llcrypt_name fname = { 0 };
3112 LASSERT(i1 != NULL);
3115 /* Do not reuse namelen for something else. */
3117 return ERR_PTR(-EINVAL);
3119 if (namelen > ll_i2sbi(i1)->ll_namelen)
3120 return ERR_PTR(-ENAMETOOLONG);
3122 /* "/" is not valid name, but it's allowed */
3123 if (!lu_name_is_valid_2(name, namelen) &&
3124 strncmp("/", name, namelen) != 0)
3125 return ERR_PTR(-EINVAL);
3128 if (op_data == NULL)
3129 OBD_ALLOC_PTR(op_data);
3131 if (op_data == NULL)
3132 return ERR_PTR(-ENOMEM);
3134 ll_i2gids(op_data->op_suppgids, i1, i2);
3135 op_data->op_fid1 = *ll_inode2fid(i1);
3137 if (S_ISDIR(i1->i_mode)) {
3138 down_read_non_owner(&ll_i2info(i1)->lli_lsm_sem);
3139 op_data->op_mea1_sem = &ll_i2info(i1)->lli_lsm_sem;
3140 op_data->op_mea1 = ll_i2info(i1)->lli_lsm_md;
3141 op_data->op_default_mea1 = ll_i2info(i1)->lli_default_lsm_md;
3145 op_data->op_fid2 = *ll_inode2fid(i2);
3146 if (S_ISDIR(i2->i_mode)) {
3148 /* i2 is typically a child of i1, and MUST be
3149 * further from the root to avoid deadlocks.
3151 down_read_non_owner(&ll_i2info(i2)->lli_lsm_sem);
3152 op_data->op_mea2_sem =
3153 &ll_i2info(i2)->lli_lsm_sem;
3155 op_data->op_mea2 = ll_i2info(i2)->lli_lsm_md;
3158 fid_zero(&op_data->op_fid2);
3161 if (ll_i2sbi(i1)->ll_flags & LL_SBI_64BIT_HASH)
3162 op_data->op_cli_flags |= CLI_HASH64;
3164 if (ll_need_32bit_api(ll_i2sbi(i1)))
3165 op_data->op_cli_flags |= CLI_API32;
3167 if (opc == LUSTRE_OPC_LOOKUP || opc == LUSTRE_OPC_CREATE) {
3168 /* In case of lookup, ll_setup_filename() has already been
3169 * called in ll_lookup_it(), so just take provided name.
3171 fname.disk_name.name = (unsigned char *)name;
3172 fname.disk_name.len = namelen;
3173 } else if (name && namelen) {
3174 struct qstr dname = QSTR_INIT(name, namelen);
3176 struct lu_fid *pfid = NULL;
3180 if (!S_ISDIR(i1->i_mode) && i2 && S_ISDIR(i2->i_mode)) {
3181 /* special case when called from ll_link() */
3186 lookup = (int)(opc == LUSTRE_OPC_ANY);
3188 if (opc == LUSTRE_OPC_ANY && lookup)
3190 rc = ll_setup_filename(dir, &dname, lookup, &fname, pfid);
3192 ll_finish_md_op_data(op_data);
3195 if (pfid && !fid_is_zero(pfid)) {
3197 op_data->op_fid2 = fid;
3198 op_data->op_bias = MDS_FID_OP;
3200 if (fname.disk_name.name &&
3201 fname.disk_name.name != (unsigned char *)name)
3202 /* op_data->op_name must be freed after use */
3203 op_data->op_flags |= MF_OPNAME_KMALLOCED;
3206 /* In fact LUSTRE_OPC_LOOKUP, LUSTRE_OPC_OPEN, LUSTRE_OPC_MIGR
3207 * are LUSTRE_OPC_ANY
3209 if (opc == LUSTRE_OPC_LOOKUP || opc == LUSTRE_OPC_OPEN ||
3210 opc == LUSTRE_OPC_MIGR)
3211 op_data->op_code = LUSTRE_OPC_ANY;
3213 op_data->op_code = opc;
3214 op_data->op_name = fname.disk_name.name;
3215 op_data->op_namelen = fname.disk_name.len;
3216 op_data->op_mode = mode;
3217 op_data->op_mod_time = ktime_get_real_seconds();
3218 op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
3219 op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
3220 op_data->op_cap = current_cap();
3221 op_data->op_mds = 0;
3222 if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
3223 filename_is_volatile(name, namelen, &op_data->op_mds)) {
3224 op_data->op_bias |= MDS_CREATE_VOLATILE;
3226 op_data->op_data = data;
3231 void ll_finish_md_op_data(struct md_op_data *op_data)
3233 ll_unlock_md_op_lsm(op_data);
3234 ll_security_release_secctx(op_data->op_file_secctx,
3235 op_data->op_file_secctx_size);
3236 if (op_data->op_flags & MF_OPNAME_KMALLOCED)
3237 /* allocated via ll_setup_filename called
3238 * from ll_prep_md_op_data
3240 kfree(op_data->op_name);
3241 llcrypt_free_ctx(op_data->op_file_encctx, op_data->op_file_encctx_size);
3242 OBD_FREE_PTR(op_data);
3245 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
3247 struct ll_sb_info *sbi;
3249 LASSERT(seq && dentry);
3250 sbi = ll_s2sbi(dentry->d_sb);
3252 if (sbi->ll_flags & LL_SBI_NOLCK)
3253 seq_puts(seq, ",nolock");
3255 /* "flock" is the default since 2.13, but it wasn't for many years,
3256 * so it is still useful to print this to show it is enabled.
3257 * Start to print "noflock" so it is now clear when flock is disabled.
3259 if (sbi->ll_flags & LL_SBI_FLOCK)
3260 seq_puts(seq, ",flock");
3261 else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
3262 seq_puts(seq, ",localflock");
3264 seq_puts(seq, ",noflock");
3266 if (sbi->ll_flags & LL_SBI_USER_XATTR)
3267 seq_puts(seq, ",user_xattr");
3269 if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
3270 seq_puts(seq, ",lazystatfs");
3272 if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
3273 seq_puts(seq, ",user_fid2path");
3275 if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
3276 seq_puts(seq, ",always_ping");
3278 if (ll_sbi_has_test_dummy_encryption(sbi))
3279 seq_puts(seq, ",test_dummy_encryption");
3281 if (ll_sbi_has_encrypt(sbi))
3282 seq_puts(seq, ",encrypt");
3284 seq_puts(seq, ",noencrypt");
3286 if (sbi->ll_flags & LL_SBI_FOREIGN_SYMLINK) {
3287 seq_puts(seq, ",foreign_symlink=");
3288 seq_puts(seq, sbi->ll_foreign_symlink_prefix);
3295 * Get obd name by cmd, and copy out to user space
3297 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
3299 struct ll_sb_info *sbi = ll_i2sbi(inode);
3300 struct obd_device *obd;
3303 if (cmd == OBD_IOC_GETNAME_OLD || cmd == OBD_IOC_GETDTNAME)
3304 obd = class_exp2obd(sbi->ll_dt_exp);
3305 else if (cmd == OBD_IOC_GETMDNAME)
3306 obd = class_exp2obd(sbi->ll_md_exp);
3313 if (copy_to_user((void __user *)arg, obd->obd_name,
3314 strlen(obd->obd_name) + 1))
3320 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
3327 p.mnt = current->fs->root.mnt;
3329 path = d_path(&p, buf, bufsize);
3334 void ll_dirty_page_discard_warn(struct page *page, int ioret)
3336 char *buf, *path = NULL;
3337 struct dentry *dentry = NULL;
3338 struct inode *inode = page->mapping->host;
3340 /* this can be called inside spin lock so use GFP_ATOMIC. */
3341 buf = (char *)__get_free_page(GFP_ATOMIC);
3343 dentry = d_find_alias(page->mapping->host);
3345 path = ll_d_path(dentry, buf, PAGE_SIZE);
3348 /* The below message is checked in recovery-small.sh test_24b */
3350 "%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
3351 "(rc %d)\n", ll_i2sbi(inode)->ll_fsname,
3352 s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
3353 PFID(ll_inode2fid(inode)),
3354 (path && !IS_ERR(path)) ? path : "", ioret);
3360 free_page((unsigned long)buf);
3363 ssize_t ll_copy_user_md(const struct lov_user_md __user *md,
3364 struct lov_user_md **kbuf)
3366 struct lov_user_md lum;
3370 if (copy_from_user(&lum, md, sizeof(lum)))
3373 lum_size = ll_lov_user_md_size(&lum);
3377 OBD_ALLOC_LARGE(*kbuf, lum_size);
3381 if (copy_from_user(*kbuf, md, lum_size) != 0) {
3382 OBD_FREE_LARGE(*kbuf, lum_size);
3390 * Compute llite root squash state after a change of root squash
3391 * configuration setting or add/remove of a lnet nid
3393 void ll_compute_rootsquash_state(struct ll_sb_info *sbi)
3395 struct root_squash_info *squash = &sbi->ll_squash;
3398 struct lnet_process_id id;
3400 /* Update norootsquash flag */
3401 spin_lock(&squash->rsi_lock);
3402 if (list_empty(&squash->rsi_nosquash_nids))
3403 sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
3405 /* Do not apply root squash as soon as one of our NIDs is
3406 * in the nosquash_nids list */
3409 while (LNetGetId(i++, &id) != -ENOENT) {
3410 if (id.nid == LNET_NID_LO_0)
3412 if (cfs_match_nid(id.nid, &squash->rsi_nosquash_nids)) {
3418 sbi->ll_flags |= LL_SBI_NOROOTSQUASH;
3420 sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
3422 spin_unlock(&squash->rsi_lock);
3426 * Parse linkea content to extract information about a given hardlink
3428 * \param[in] ldata - Initialized linkea data
3429 * \param[in] linkno - Link identifier
3430 * \param[out] parent_fid - The entry's parent FID
3431 * \param[out] ln - Entry name destination buffer
3433 * \retval 0 on success
3434 * \retval Appropriate negative error code on failure
3436 static int ll_linkea_decode(struct linkea_data *ldata, unsigned int linkno,
3437 struct lu_fid *parent_fid, struct lu_name *ln)
3443 rc = linkea_init_with_rec(ldata);
3447 if (linkno >= ldata->ld_leh->leh_reccount)
3448 /* beyond last link */
3451 linkea_first_entry(ldata);
3452 for (idx = 0; ldata->ld_lee != NULL; idx++) {
3453 linkea_entry_unpack(ldata->ld_lee, &ldata->ld_reclen, ln,
3458 linkea_next_entry(ldata);
3468 * Get parent FID and name of an identified link. Operation is performed for
3469 * a given link number, letting the caller iterate over linkno to list one or
3470 * all links of an entry.
3472 * \param[in] file - File descriptor against which to perform the operation
3473 * \param[in,out] arg - User-filled structure containing the linkno to operate
3474 * on and the available size. It is eventually filled with
3475 * the requested information or left untouched on error
3477 * \retval - 0 on success
3478 * \retval - Appropriate negative error code on failure
3480 int ll_getparent(struct file *file, struct getparent __user *arg)
3482 struct inode *inode = file_inode(file);
3483 struct linkea_data *ldata;
3484 struct lu_buf buf = LU_BUF_NULL;
3486 struct lu_fid parent_fid;
3493 if (!capable(CAP_DAC_READ_SEARCH) &&
3494 !(ll_i2sbi(inode)->ll_flags & LL_SBI_USER_FID2PATH))
3497 if (get_user(name_size, &arg->gp_name_size))
3500 if (get_user(linkno, &arg->gp_linkno))
3503 if (name_size > PATH_MAX)
3506 OBD_ALLOC(ldata, sizeof(*ldata));
3510 rc = linkea_data_new(ldata, &buf);
3512 GOTO(ldata_free, rc);
3514 rc = ll_xattr_list(inode, XATTR_NAME_LINK, XATTR_TRUSTED_T, buf.lb_buf,
3515 buf.lb_len, OBD_MD_FLXATTR);
3519 rc = ll_linkea_decode(ldata, linkno, &parent_fid, &ln);
3523 if (ln.ln_namelen >= name_size)
3524 GOTO(lb_free, rc = -EOVERFLOW);
3526 if (copy_to_user(&arg->gp_fid, &parent_fid, sizeof(arg->gp_fid)))
3527 GOTO(lb_free, rc = -EFAULT);
3529 if (copy_to_user(&arg->gp_name, ln.ln_name, ln.ln_namelen))
3530 GOTO(lb_free, rc = -EFAULT);
3532 if (put_user('\0', arg->gp_name + ln.ln_namelen))
3533 GOTO(lb_free, rc = -EFAULT);
3538 OBD_FREE(ldata, sizeof(*ldata));