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[fs/lustre-release.git] / lustre / llite / llite_lib.c
1 /*
2  * GPL HEADER START
3  *
4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5  *
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.
9  *
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).
15  *
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
19  *
20  * GPL HEADER END
21  */
22 /*
23  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
24  * Use is subject to license terms.
25  *
26  * Copyright (c) 2011, 2017, Intel Corporation.
27  */
28 /*
29  * This file is part of Lustre, http://www.lustre.org/
30  * Lustre is a trademark of Sun Microsystems, Inc.
31  *
32  * lustre/llite/llite_lib.c
33  *
34  * Lustre Light Super operations
35  */
36
37 #define DEBUG_SUBSYSTEM S_LLITE
38
39 #include <linux/module.h>
40 #include <linux/statfs.h>
41 #include <linux/time.h>
42 #include <linux/types.h>
43 #include <linux/version.h>
44 #include <linux/mm.h>
45 #include <linux/user_namespace.h>
46 #ifdef HAVE_UIDGID_HEADER
47 # include <linux/uidgid.h>
48 #endif
49 #include <linux/security.h>
50
51 #include <uapi/linux/lustre/lustre_ioctl.h>
52 #include <lustre_ha.h>
53 #include <lustre_dlm.h>
54 #include <lprocfs_status.h>
55 #include <lustre_disk.h>
56 #include <uapi/linux/lustre/lustre_param.h>
57 #include <lustre_log.h>
58 #include <cl_object.h>
59 #include <obd_cksum.h>
60 #include "llite_internal.h"
61
62 struct kmem_cache *ll_file_data_slab;
63
64 #ifndef log2
65 #define log2(n) ffz(~(n))
66 #endif
67
68 static struct ll_sb_info *ll_init_sbi(void)
69 {
70         struct ll_sb_info *sbi = NULL;
71         unsigned long pages;
72         unsigned long lru_page_max;
73         struct sysinfo si;
74         class_uuid_t uuid;
75         int i;
76         ENTRY;
77
78         OBD_ALLOC_PTR(sbi);
79         if (sbi == NULL)
80                 RETURN(NULL);
81
82         spin_lock_init(&sbi->ll_lock);
83         mutex_init(&sbi->ll_lco.lco_lock);
84         spin_lock_init(&sbi->ll_pp_extent_lock);
85         spin_lock_init(&sbi->ll_process_lock);
86         sbi->ll_rw_stats_on = 0;
87
88         si_meminfo(&si);
89         pages = si.totalram - si.totalhigh;
90         lru_page_max = pages / 2;
91
92         /* initialize ll_cache data */
93         sbi->ll_cache = cl_cache_init(lru_page_max);
94         if (sbi->ll_cache == NULL) {
95                 OBD_FREE(sbi, sizeof(*sbi));
96                 RETURN(NULL);
97         }
98
99         sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
100                                            SBI_DEFAULT_READAHEAD_MAX);
101         sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
102         sbi->ll_ra_info.ra_max_read_ahead_whole_pages = -1;
103
104         ll_generate_random_uuid(uuid);
105         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
106         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
107
108         sbi->ll_flags |= LL_SBI_VERBOSE;
109 #ifdef ENABLE_CHECKSUM
110         sbi->ll_flags |= LL_SBI_CHECKSUM;
111 #endif
112
113 #ifdef HAVE_LRU_RESIZE_SUPPORT
114         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
115 #endif
116         sbi->ll_flags |= LL_SBI_LAZYSTATFS;
117
118         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
119                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
120                                pp_r_hist.oh_lock);
121                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
122                                pp_w_hist.oh_lock);
123         }
124
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;
135
136         /* root squash */
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);
141
142         RETURN(sbi);
143 }
144
145 static void ll_free_sbi(struct super_block *sb)
146 {
147         struct ll_sb_info *sbi = ll_s2sbi(sb);
148         ENTRY;
149
150         if (sbi != NULL) {
151                 if (!list_empty(&sbi->ll_squash.rsi_nosquash_nids))
152                         cfs_free_nidlist(&sbi->ll_squash.rsi_nosquash_nids);
153                 if (sbi->ll_cache != NULL) {
154                         cl_cache_decref(sbi->ll_cache);
155                         sbi->ll_cache = NULL;
156                 }
157                 OBD_FREE(sbi, sizeof(*sbi));
158         }
159         EXIT;
160 }
161
162 static inline int obd_connect_has_secctx(struct obd_connect_data *data)
163 {
164         return data->ocd_connect_flags & OBD_CONNECT_FLAGS2 &&
165                data->ocd_connect_flags2 & OBD_CONNECT2_FILE_SECCTX;
166 }
167
168 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
169                                     struct vfsmount *mnt)
170 {
171         struct inode *root = NULL;
172         struct ll_sb_info *sbi = ll_s2sbi(sb);
173         struct obd_device *obd;
174         struct obd_statfs *osfs = NULL;
175         struct ptlrpc_request *request = NULL;
176         struct obd_connect_data *data = NULL;
177         struct obd_uuid *uuid;
178         struct md_op_data *op_data;
179         struct lustre_md lmd;
180         u64 valid;
181         int size, err, checksum;
182         ENTRY;
183
184         obd = class_name2obd(md);
185         if (!obd) {
186                 CERROR("MD %s: not setup or attached\n", md);
187                 RETURN(-EINVAL);
188         }
189
190         OBD_ALLOC_PTR(data);
191         if (data == NULL)
192                 RETURN(-ENOMEM);
193
194         OBD_ALLOC_PTR(osfs);
195         if (osfs == NULL) {
196                 OBD_FREE_PTR(data);
197                 RETURN(-ENOMEM);
198         }
199
200         /* pass client page size via ocd_grant_blkbits, the server should report
201          * back its backend blocksize for grant calculation purpose */
202         data->ocd_grant_blkbits = PAGE_SHIFT;
203
204         /* indicate MDT features supported by this client */
205         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
206                                   OBD_CONNECT_ATTRFID  | OBD_CONNECT_GRANT |
207                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
208                                   OBD_CONNECT_SRVLOCK  | OBD_CONNECT_TRUNCLOCK|
209                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
210                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
211                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
212                                   OBD_CONNECT_VBR | OBD_CONNECT_FULL20 |
213                                   OBD_CONNECT_64BITHASH |
214                                   OBD_CONNECT_EINPROGRESS |
215                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
216                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS|
217                                   OBD_CONNECT_MAX_EASIZE |
218                                   OBD_CONNECT_FLOCK_DEAD |
219                                   OBD_CONNECT_DISP_STRIPE | OBD_CONNECT_LFSCK |
220                                   OBD_CONNECT_OPEN_BY_FID |
221                                   OBD_CONNECT_DIR_STRIPE |
222                                   OBD_CONNECT_BULK_MBITS | OBD_CONNECT_CKSUM |
223                                   OBD_CONNECT_SUBTREE |
224                                   OBD_CONNECT_MULTIMODRPCS |
225                                   OBD_CONNECT_GRANT_PARAM |
226                                   OBD_CONNECT_SHORTIO | OBD_CONNECT_FLAGS2;
227
228         data->ocd_connect_flags2 = OBD_CONNECT2_FLR |
229                                    OBD_CONNECT2_LOCK_CONVERT |
230                                    OBD_CONNECT2_DIR_MIGRATE;
231
232 #ifdef HAVE_LRU_RESIZE_SUPPORT
233         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
234                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
235 #endif
236 #ifdef CONFIG_FS_POSIX_ACL
237         data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK |
238                                    OBD_CONNECT_LARGE_ACL;
239 #endif
240
241         data->ocd_cksum_types = obd_cksum_types_supported_client();
242
243         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
244                 /* flag mdc connection as lightweight, only used for test
245                  * purpose, use with care */
246                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
247
248         data->ocd_ibits_known = MDS_INODELOCK_FULL;
249         data->ocd_version = LUSTRE_VERSION_CODE;
250
251         if (sb->s_flags & MS_RDONLY)
252                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
253         if (sbi->ll_flags & LL_SBI_USER_XATTR)
254                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
255
256 #ifdef MS_NOSEC
257         /* Setting this indicates we correctly support S_NOSEC (See kernel
258          * commit 9e1f1de02c2275d7172e18dc4e7c2065777611bf)
259          */
260         sb->s_flags |= MS_NOSEC;
261 #endif
262
263         if (sbi->ll_flags & LL_SBI_FLOCK)
264                 sbi->ll_fop = &ll_file_operations_flock;
265         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
266                 sbi->ll_fop = &ll_file_operations;
267         else
268                 sbi->ll_fop = &ll_file_operations_noflock;
269
270         /* always ping even if server suppress_pings */
271         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
272                 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
273
274 #if defined(HAVE_SECURITY_DENTRY_INIT_SECURITY) && defined(CONFIG_SECURITY)
275         data->ocd_connect_flags2 |= OBD_CONNECT2_FILE_SECCTX;
276 #endif /* HAVE_SECURITY_DENTRY_INIT_SECURITY */
277
278         data->ocd_brw_size = MD_MAX_BRW_SIZE;
279
280         err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid, data, NULL);
281         if (err == -EBUSY) {
282                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
283                                    "recovery, of which this client is not a "
284                                    "part. Please wait for recovery to complete,"
285                                    " abort, or time out.\n", md);
286                 GOTO(out, err);
287         } else if (err) {
288                 CERROR("cannot connect to %s: rc = %d\n", md, err);
289                 GOTO(out, err);
290         }
291
292         sbi->ll_md_exp->exp_connect_data = *data;
293
294         err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
295                            LUSTRE_SEQ_METADATA);
296         if (err) {
297                 CERROR("%s: Can't init metadata layer FID infrastructure, "
298                        "rc = %d\n", sbi->ll_md_exp->exp_obd->obd_name, err);
299                 GOTO(out_md, err);
300         }
301
302         /* For mount, we only need fs info from MDT0, and also in DNE, it
303          * can make sure the client can be mounted as long as MDT0 is
304          * avaible */
305         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
306                         ktime_get_seconds() -OBD_STATFS_CACHE_SECONDS,
307                         OBD_STATFS_FOR_MDT0);
308         if (err)
309                 GOTO(out_md_fid, err);
310
311         /* This needs to be after statfs to ensure connect has finished.
312          * Note that "data" does NOT contain the valid connect reply.
313          * If connecting to a 1.8 server there will be no LMV device, so
314          * we can access the MDC export directly and exp_connect_flags will
315          * be non-zero, but if accessing an upgraded 2.1 server it will
316          * have the correct flags filled in.
317          * XXX: fill in the LMV exp_connect_flags from MDC(s). */
318         valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
319         if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
320             valid != CLIENT_CONNECT_MDT_REQD) {
321                 char *buf;
322
323                 OBD_ALLOC_WAIT(buf, PAGE_SIZE);
324                 obd_connect_flags2str(buf, PAGE_SIZE,
325                                       valid ^ CLIENT_CONNECT_MDT_REQD, 0, ",");
326                 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
327                                    "feature(s) needed for correct operation "
328                                    "of this client (%s). Please upgrade "
329                                    "server or downgrade client.\n",
330                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
331                 OBD_FREE(buf, PAGE_SIZE);
332                 GOTO(out_md_fid, err = -EPROTO);
333         }
334
335         size = sizeof(*data);
336         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
337                            KEY_CONN_DATA,  &size, data);
338         if (err) {
339                 CERROR("%s: Get connect data failed: rc = %d\n",
340                        sbi->ll_md_exp->exp_obd->obd_name, err);
341                 GOTO(out_md_fid, err);
342         }
343
344         LASSERT(osfs->os_bsize);
345         sb->s_blocksize = osfs->os_bsize;
346         sb->s_blocksize_bits = log2(osfs->os_bsize);
347         sb->s_magic = LL_SUPER_MAGIC;
348         sb->s_maxbytes = MAX_LFS_FILESIZE;
349         sbi->ll_namelen = osfs->os_namelen;
350         sbi->ll_mnt.mnt = current->fs->root.mnt;
351
352         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
353             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
354                 LCONSOLE_INFO("Disabling user_xattr feature because "
355                               "it is not supported on the server\n");
356                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
357         }
358
359         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
360 #ifdef MS_POSIXACL
361                 sb->s_flags |= MS_POSIXACL;
362 #endif
363                 sbi->ll_flags |= LL_SBI_ACL;
364         } else {
365                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
366 #ifdef MS_POSIXACL
367                 sb->s_flags &= ~MS_POSIXACL;
368 #endif
369                 sbi->ll_flags &= ~LL_SBI_ACL;
370         }
371
372         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
373                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
374
375         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK)
376                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
377
378         if (obd_connect_has_secctx(data))
379                 sbi->ll_flags |= LL_SBI_FILE_SECCTX;
380
381         if (data->ocd_ibits_known & MDS_INODELOCK_XATTR) {
382                 if (!(data->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)) {
383                         LCONSOLE_INFO("%s: disabling xattr cache due to "
384                                       "unknown maximum xattr size.\n", dt);
385                 } else if (!sbi->ll_xattr_cache_set) {
386                         /* If xattr_cache is already set (no matter 0 or 1)
387                          * during processing llog, it won't be enabled here. */
388                         sbi->ll_flags |= LL_SBI_XATTR_CACHE;
389                         sbi->ll_xattr_cache_enabled = 1;
390                 }
391         }
392
393         obd = class_name2obd(dt);
394         if (!obd) {
395                 CERROR("DT %s: not setup or attached\n", dt);
396                 GOTO(out_md_fid, err = -ENODEV);
397         }
398
399         /* pass client page size via ocd_grant_blkbits, the server should report
400          * back its backend blocksize for grant calculation purpose */
401         data->ocd_grant_blkbits = PAGE_SHIFT;
402
403         /* indicate OST features supported by this client */
404         data->ocd_connect_flags = OBD_CONNECT_GRANT | OBD_CONNECT_VERSION |
405                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
406                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID |
407                                   OBD_CONNECT_SRVLOCK | OBD_CONNECT_TRUNCLOCK|
408                                   OBD_CONNECT_AT | OBD_CONNECT_OSS_CAPA |
409                                   OBD_CONNECT_VBR | OBD_CONNECT_FULL20 |
410                                   OBD_CONNECT_64BITHASH | OBD_CONNECT_MAXBYTES |
411                                   OBD_CONNECT_EINPROGRESS |
412                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
413                                   OBD_CONNECT_LAYOUTLOCK |
414                                   OBD_CONNECT_PINGLESS | OBD_CONNECT_LFSCK |
415                                   OBD_CONNECT_BULK_MBITS | OBD_CONNECT_SHORTIO |
416                                   OBD_CONNECT_FLAGS2 | OBD_CONNECT_GRANT_SHRINK;
417
418 /* The client currently advertises support for OBD_CONNECT_LOCKAHEAD_OLD so it
419  * can interoperate with an older version of lockahead which was released prior
420  * to landing in master. This support will be dropped when 2.13 development
421  * starts.  At the point, we should not just drop the connect flag (below), we
422  * should also remove the support in the code.
423  *
424  * Removing it means a few things:
425  * 1. Remove this section here
426  * 2. Remove CEF_NONBLOCK in ll_file_lockahead()
427  * 3. Remove function exp_connect_lockahead_old
428  * 4. Remove LDLM_FL_LOCKAHEAD_OLD_RESERVED in lustre_dlm_flags.h
429  * */
430 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 12, 50, 0)
431         data->ocd_connect_flags |= OBD_CONNECT_LOCKAHEAD_OLD;
432 #endif
433
434         data->ocd_connect_flags2 = OBD_CONNECT2_LOCKAHEAD;
435
436         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_GRANT_PARAM))
437                 data->ocd_connect_flags |= OBD_CONNECT_GRANT_PARAM;
438
439         /* OBD_CONNECT_CKSUM should always be set, even if checksums are
440          * disabled by default, because it can still be enabled on the
441          * fly via /proc. As a consequence, we still need to come to an
442          * agreement on the supported algorithms at connect time */
443         data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
444
445         if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
446                 data->ocd_cksum_types = OBD_CKSUM_ADLER;
447         else
448                 data->ocd_cksum_types = obd_cksum_types_supported_client();
449
450 #ifdef HAVE_LRU_RESIZE_SUPPORT
451         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
452 #endif
453         /* always ping even if server suppress_pings */
454         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
455                 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
456
457         CDEBUG(D_RPCTRACE, "ocd_connect_flags: %#llx ocd_version: %d "
458                "ocd_grant: %d\n", data->ocd_connect_flags,
459                data->ocd_version, data->ocd_grant);
460
461         obd->obd_upcall.onu_owner = &sbi->ll_lco;
462         obd->obd_upcall.onu_upcall = cl_ocd_update;
463
464         data->ocd_brw_size = DT_MAX_BRW_SIZE;
465
466         err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data,
467                           NULL);
468         if (err == -EBUSY) {
469                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
470                                    "recovery, of which this client is not a "
471                                    "part.  Please wait for recovery to "
472                                    "complete, abort, or time out.\n", dt);
473                 GOTO(out_md, err);
474         } else if (err) {
475                 CERROR("%s: Cannot connect to %s: rc = %d\n",
476                        sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
477                 GOTO(out_md, err);
478         }
479
480         sbi->ll_dt_exp->exp_connect_data = *data;
481
482         /* Don't change value if it was specified in the config log */
483         if (sbi->ll_ra_info.ra_max_read_ahead_whole_pages == -1)
484                 sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
485                         max_t(unsigned long, SBI_DEFAULT_READAHEAD_WHOLE_MAX,
486                               (data->ocd_brw_size >> PAGE_SHIFT));
487
488         err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
489                            LUSTRE_SEQ_METADATA);
490         if (err) {
491                 CERROR("%s: Can't init data layer FID infrastructure, "
492                        "rc = %d\n", sbi->ll_dt_exp->exp_obd->obd_name, err);
493                 GOTO(out_dt, err);
494         }
495
496         mutex_lock(&sbi->ll_lco.lco_lock);
497         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
498         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
499         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
500         mutex_unlock(&sbi->ll_lco.lco_lock);
501
502         fid_zero(&sbi->ll_root_fid);
503         err = md_get_root(sbi->ll_md_exp, get_mount_fileset(sb),
504                            &sbi->ll_root_fid);
505         if (err) {
506                 CERROR("cannot mds_connect: rc = %d\n", err);
507                 GOTO(out_lock_cn_cb, err);
508         }
509         if (!fid_is_sane(&sbi->ll_root_fid)) {
510                 CERROR("%s: Invalid root fid "DFID" during mount\n",
511                        sbi->ll_md_exp->exp_obd->obd_name,
512                        PFID(&sbi->ll_root_fid));
513                 GOTO(out_lock_cn_cb, err = -EINVAL);
514         }
515         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
516
517         sb->s_op = &lustre_super_operations;
518 #ifdef HAVE_XATTR_HANDLER_FLAGS
519         sb->s_xattr = ll_xattr_handlers;
520 #endif
521 #if THREAD_SIZE >= 8192 /*b=17630*/
522         sb->s_export_op = &lustre_export_operations;
523 #endif
524
525         /* make root inode
526          * XXX: move this to after cbd setup? */
527         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMODEASIZE;
528         if (sbi->ll_flags & LL_SBI_ACL)
529                 valid |= OBD_MD_FLACL;
530
531         OBD_ALLOC_PTR(op_data);
532         if (op_data == NULL)
533                 GOTO(out_lock_cn_cb, err = -ENOMEM);
534
535         op_data->op_fid1 = sbi->ll_root_fid;
536         op_data->op_mode = 0;
537         op_data->op_valid = valid;
538
539         err = md_getattr(sbi->ll_md_exp, op_data, &request);
540
541         OBD_FREE_PTR(op_data);
542         if (err) {
543                 CERROR("%s: md_getattr failed for root: rc = %d\n",
544                        sbi->ll_md_exp->exp_obd->obd_name, err);
545                 GOTO(out_lock_cn_cb, err);
546         }
547
548         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
549                                sbi->ll_md_exp, &lmd);
550         if (err) {
551                 CERROR("failed to understand root inode md: rc = %d\n", err);
552                 ptlrpc_req_finished(request);
553                 GOTO(out_lock_cn_cb, err);
554         }
555
556         LASSERT(fid_is_sane(&sbi->ll_root_fid));
557         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
558                                             sbi->ll_flags & LL_SBI_32BIT_API),
559                        &lmd);
560         md_free_lustre_md(sbi->ll_md_exp, &lmd);
561         ptlrpc_req_finished(request);
562
563         if (IS_ERR(root)) {
564 #ifdef CONFIG_FS_POSIX_ACL
565                 if (lmd.posix_acl) {
566                         posix_acl_release(lmd.posix_acl);
567                         lmd.posix_acl = NULL;
568                 }
569 #endif
570                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
571                 root = NULL;
572                 CERROR("lustre_lite: bad iget4 for root\n");
573                 GOTO(out_root, err);
574         }
575
576         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
577         if (sbi->ll_checksum_set) {
578                 err = obd_set_info_async(NULL, sbi->ll_dt_exp,
579                                          sizeof(KEY_CHECKSUM), KEY_CHECKSUM,
580                                          sizeof(checksum), &checksum, NULL);
581                 if (err) {
582                         CERROR("%s: Set checksum failed: rc = %d\n",
583                                sbi->ll_dt_exp->exp_obd->obd_name, err);
584                         GOTO(out_root, err);
585                 }
586         }
587         cl_sb_init(sb);
588
589         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CACHE_SET),
590                                  KEY_CACHE_SET, sizeof(*sbi->ll_cache),
591                                  sbi->ll_cache, NULL);
592         if (err) {
593                 CERROR("%s: Set cache_set failed: rc = %d\n",
594                        sbi->ll_dt_exp->exp_obd->obd_name, err);
595                 GOTO(out_root, err);
596         }
597
598         sb->s_root = d_make_root(root);
599         if (sb->s_root == NULL) {
600                 CERROR("%s: can't make root dentry\n",
601                         ll_get_fsname(sb, NULL, 0));
602                 GOTO(out_root, err = -ENOMEM);
603         }
604 #ifdef HAVE_DCACHE_LOCK
605         sb->s_root->d_op = &ll_d_ops;
606 #endif
607
608         sbi->ll_sdev_orig = sb->s_dev;
609
610         /* We set sb->s_dev equal on all lustre clients in order to support
611          * NFS export clustering.  NFSD requires that the FSID be the same
612          * on all clients. */
613         /* s_dev is also used in lt_compare() to compare two fs, but that is
614          * only a node-local comparison. */
615         uuid = obd_get_uuid(sbi->ll_md_exp);
616         if (uuid != NULL)
617                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
618
619         if (data != NULL)
620                 OBD_FREE_PTR(data);
621         if (osfs != NULL)
622                 OBD_FREE_PTR(osfs);
623
624         if (sbi->ll_proc_root != NULL) {
625                 err = lprocfs_ll_register_obd(sb, dt);
626                 if (err < 0) {
627                         CERROR("%s: could not register %s in llite: rc = %d\n",
628                                dt, ll_get_fsname(sb, NULL, 0), err);
629                         err = 0;
630                 }
631                 err = lprocfs_ll_register_obd(sb, md);
632                 if (err < 0) {
633                         CERROR("%s: could not register %s in llite: rc = %d\n",
634                                md, ll_get_fsname(sb, NULL, 0), err);
635                         err = 0;
636                 }
637         }
638
639         RETURN(err);
640 out_root:
641         if (root)
642                 iput(root);
643 out_lock_cn_cb:
644         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
645 out_dt:
646         obd_disconnect(sbi->ll_dt_exp);
647         sbi->ll_dt_exp = NULL;
648 out_md_fid:
649         obd_fid_fini(sbi->ll_md_exp->exp_obd);
650 out_md:
651         obd_disconnect(sbi->ll_md_exp);
652         sbi->ll_md_exp = NULL;
653 out:
654         if (data != NULL)
655                 OBD_FREE_PTR(data);
656         if (osfs != NULL)
657                 OBD_FREE_PTR(osfs);
658         return err;
659 }
660
661 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
662 {
663         int size, rc;
664
665         size = sizeof(*lmmsize);
666         rc = obd_get_info(NULL, sbi->ll_dt_exp, sizeof(KEY_MAX_EASIZE),
667                           KEY_MAX_EASIZE, &size, lmmsize);
668         if (rc != 0) {
669                 CERROR("%s: cannot get max LOV EA size: rc = %d\n",
670                        sbi->ll_dt_exp->exp_obd->obd_name, rc);
671                 RETURN(rc);
672         }
673
674         size = sizeof(int);
675         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
676                           KEY_MAX_EASIZE, &size, lmmsize);
677         if (rc)
678                 CERROR("Get max mdsize error rc %d\n", rc);
679
680         RETURN(rc);
681 }
682
683 /**
684  * Get the value of the default_easize parameter.
685  *
686  * \see client_obd::cl_default_mds_easize
687  *
688  * \param[in] sbi       superblock info for this filesystem
689  * \param[out] lmmsize  pointer to storage location for value
690  *
691  * \retval 0            on success
692  * \retval negative     negated errno on failure
693  */
694 int ll_get_default_mdsize(struct ll_sb_info *sbi, int *lmmsize)
695 {
696         int size, rc;
697
698         size = sizeof(int);
699         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_DEFAULT_EASIZE),
700                          KEY_DEFAULT_EASIZE, &size, lmmsize);
701         if (rc)
702                 CERROR("Get default mdsize error rc %d\n", rc);
703
704         RETURN(rc);
705 }
706
707 /**
708  * Set the default_easize parameter to the given value.
709  *
710  * \see client_obd::cl_default_mds_easize
711  *
712  * \param[in] sbi       superblock info for this filesystem
713  * \param[in] lmmsize   the size to set
714  *
715  * \retval 0            on success
716  * \retval negative     negated errno on failure
717  */
718 int ll_set_default_mdsize(struct ll_sb_info *sbi, int lmmsize)
719 {
720         int rc;
721
722         if (lmmsize < sizeof(struct lov_mds_md) ||
723             lmmsize > OBD_MAX_DEFAULT_EA_SIZE)
724                 return -EINVAL;
725
726         rc = obd_set_info_async(NULL, sbi->ll_md_exp,
727                                 sizeof(KEY_DEFAULT_EASIZE), KEY_DEFAULT_EASIZE,
728                                 sizeof(int), &lmmsize, NULL);
729
730         RETURN(rc);
731 }
732
733 static void client_common_put_super(struct super_block *sb)
734 {
735         struct ll_sb_info *sbi = ll_s2sbi(sb);
736         ENTRY;
737
738         cl_sb_fini(sb);
739
740         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
741         obd_disconnect(sbi->ll_dt_exp);
742         sbi->ll_dt_exp = NULL;
743
744         ll_debugfs_unregister_super(sb);
745
746         obd_fid_fini(sbi->ll_md_exp->exp_obd);
747         obd_disconnect(sbi->ll_md_exp);
748         sbi->ll_md_exp = NULL;
749
750         EXIT;
751 }
752
753 void ll_kill_super(struct super_block *sb)
754 {
755         struct ll_sb_info *sbi;
756         ENTRY;
757
758         /* not init sb ?*/
759         if (!(sb->s_flags & MS_ACTIVE))
760                 return;
761
762         sbi = ll_s2sbi(sb);
763         /* we need restore s_dev from changed for clustred NFS before put_super
764          * because new kernels have cached s_dev and change sb->s_dev in
765          * put_super not affected real removing devices */
766         if (sbi) {
767                 sb->s_dev = sbi->ll_sdev_orig;
768                 sbi->ll_umounting = 1;
769
770                 /* wait running statahead threads to quit */
771                 while (atomic_read(&sbi->ll_sa_running) > 0) {
772                         set_current_state(TASK_UNINTERRUPTIBLE);
773                         schedule_timeout(msecs_to_jiffies(MSEC_PER_SEC >> 3));
774                 }
775         }
776
777         EXIT;
778 }
779
780 static inline int ll_set_opt(const char *opt, char *data, int fl)
781 {
782         if (strncmp(opt, data, strlen(opt)) != 0)
783                 return 0;
784         else
785                 return fl;
786 }
787
788 /* non-client-specific mount options are parsed in lmd_parse */
789 static int ll_options(char *options, struct ll_sb_info *sbi)
790 {
791         int tmp;
792         char *s1 = options, *s2;
793         int *flags = &sbi->ll_flags;
794         ENTRY;
795
796         if (!options)
797                 RETURN(0);
798
799         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
800
801         while (*s1) {
802                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
803                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
804                 if (tmp) {
805                         *flags |= tmp;
806                         goto next;
807                 }
808                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
809                 if (tmp) {
810                         *flags |= tmp;
811                         goto next;
812                 }
813                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
814                 if (tmp) {
815                         *flags |= tmp;
816                         goto next;
817                 }
818                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
819                 if (tmp) {
820                         *flags &= ~tmp;
821                         goto next;
822                 }
823                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
824                 if (tmp) {
825                         *flags |= tmp;
826                         goto next;
827                 }
828                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
829                 if (tmp) {
830                         *flags &= ~tmp;
831                         goto next;
832                 }
833                 tmp = ll_set_opt("context", s1, 1);
834                 if (tmp)
835                         goto next;
836                 tmp = ll_set_opt("fscontext", s1, 1);
837                 if (tmp)
838                         goto next;
839                 tmp = ll_set_opt("defcontext", s1, 1);
840                 if (tmp)
841                         goto next;
842                 tmp = ll_set_opt("rootcontext", s1, 1);
843                 if (tmp)
844                         goto next;
845                 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
846                 if (tmp) {
847                         *flags |= tmp;
848                         goto next;
849                 }
850                 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
851                 if (tmp) {
852                         *flags &= ~tmp;
853                         goto next;
854                 }
855
856                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
857                 if (tmp) {
858                         *flags |= tmp;
859                         sbi->ll_checksum_set = 1;
860                         goto next;
861                 }
862                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
863                 if (tmp) {
864                         *flags &= ~tmp;
865                         sbi->ll_checksum_set = 1;
866                         goto next;
867                 }
868                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
869                 if (tmp) {
870                         *flags |= tmp;
871                         goto next;
872                 }
873                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
874                 if (tmp) {
875                         *flags &= ~tmp;
876                         goto next;
877                 }
878                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
879                 if (tmp) {
880                         *flags |= tmp;
881                         goto next;
882                 }
883                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
884                 if (tmp) {
885                         *flags &= ~tmp;
886                         goto next;
887                 }
888                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
889                 if (tmp) {
890                         *flags |= tmp;
891                         goto next;
892                 }
893                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
894                 if (tmp) {
895                         *flags |= tmp;
896                         goto next;
897                 }
898                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
899                 if (tmp) {
900                         *flags &= ~tmp;
901                         goto next;
902                 }
903                 tmp = ll_set_opt("always_ping", s1, LL_SBI_ALWAYS_PING);
904                 if (tmp) {
905                         *flags |= tmp;
906                         goto next;
907                 }
908                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
909                                    s1);
910                 RETURN(-EINVAL);
911
912 next:
913                 /* Find next opt */
914                 s2 = strchr(s1, ',');
915                 if (s2 == NULL)
916                         break;
917                 s1 = s2 + 1;
918         }
919         RETURN(0);
920 }
921
922 void ll_lli_init(struct ll_inode_info *lli)
923 {
924         lli->lli_inode_magic = LLI_INODE_MAGIC;
925         lli->lli_flags = 0;
926         spin_lock_init(&lli->lli_lock);
927         lli->lli_posix_acl = NULL;
928         /* Do not set lli_fid, it has been initialized already. */
929         fid_zero(&lli->lli_pfid);
930         lli->lli_mds_read_och = NULL;
931         lli->lli_mds_write_och = NULL;
932         lli->lli_mds_exec_och = NULL;
933         lli->lli_open_fd_read_count = 0;
934         lli->lli_open_fd_write_count = 0;
935         lli->lli_open_fd_exec_count = 0;
936         mutex_init(&lli->lli_och_mutex);
937         spin_lock_init(&lli->lli_agl_lock);
938         spin_lock_init(&lli->lli_layout_lock);
939         ll_layout_version_set(lli, CL_LAYOUT_GEN_NONE);
940         lli->lli_clob = NULL;
941
942         init_rwsem(&lli->lli_xattrs_list_rwsem);
943         mutex_init(&lli->lli_xattrs_enq_lock);
944
945         LASSERT(lli->lli_vfs_inode.i_mode != 0);
946         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
947                 mutex_init(&lli->lli_readdir_mutex);
948                 lli->lli_opendir_key = NULL;
949                 lli->lli_sai = NULL;
950                 spin_lock_init(&lli->lli_sa_lock);
951                 lli->lli_opendir_pid = 0;
952                 lli->lli_sa_enabled = 0;
953                 lli->lli_def_stripe_offset = -1;
954         } else {
955                 mutex_init(&lli->lli_size_mutex);
956                 lli->lli_symlink_name = NULL;
957                 init_rwsem(&lli->lli_trunc_sem);
958                 range_lock_tree_init(&lli->lli_write_tree);
959                 init_rwsem(&lli->lli_glimpse_sem);
960                 lli->lli_glimpse_time = ktime_set(0, 0);
961                 INIT_LIST_HEAD(&lli->lli_agl_list);
962                 lli->lli_agl_index = 0;
963                 lli->lli_async_rc = 0;
964         }
965         mutex_init(&lli->lli_layout_mutex);
966         memset(lli->lli_jobid, 0, sizeof(lli->lli_jobid));
967 }
968
969 #define MAX_STRING_SIZE 128
970
971 #ifndef HAVE_SUPER_SETUP_BDI_NAME
972
973 #define LSI_BDI_INITIALIZED     0x00400000
974
975 #ifndef HAVE_BDI_CAP_MAP_COPY
976 # define BDI_CAP_MAP_COPY       0
977 #endif
978
979 static int super_setup_bdi_name(struct super_block *sb, char *fmt, ...)
980 {
981         struct  lustre_sb_info *lsi = s2lsi(sb);
982         char buf[MAX_STRING_SIZE];
983         va_list args;
984         int err;
985
986         err = bdi_init(&lsi->lsi_bdi);
987         if (err)
988                 return err;
989
990         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
991         lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
992         lsi->lsi_bdi.name = "lustre";
993         va_start(args, fmt);
994         vsnprintf(buf, MAX_STRING_SIZE, fmt, args);
995         va_end(args);
996         err = bdi_register(&lsi->lsi_bdi, NULL, "%s", buf);
997         va_end(args);
998         if (!err)
999                 sb->s_bdi = &lsi->lsi_bdi;
1000
1001         return err;
1002 }
1003 #endif /* !HAVE_SUPER_SETUP_BDI_NAME */
1004
1005 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
1006 {
1007         struct  lustre_profile *lprof = NULL;
1008         struct  lustre_sb_info *lsi = s2lsi(sb);
1009         struct  ll_sb_info *sbi = NULL;
1010         char    *dt = NULL, *md = NULL;
1011         char    *profilenm = get_profile_name(sb);
1012         struct config_llog_instance *cfg;
1013         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
1014         const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
1015         char name[MAX_STRING_SIZE];
1016         int md_len = 0;
1017         int dt_len = 0;
1018         char *ptr;
1019         int len;
1020         int err;
1021
1022         ENTRY;
1023         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
1024
1025         try_module_get(THIS_MODULE);
1026
1027         OBD_ALLOC_PTR(cfg);
1028         if (cfg == NULL)
1029                 GOTO(out_free, err = -ENOMEM);
1030
1031         /* client additional sb info */
1032         lsi->lsi_llsbi = sbi = ll_init_sbi();
1033         if (!sbi)
1034                 GOTO(out_free, err = -ENOMEM);
1035
1036         err = ll_options(lsi->lsi_lmd->lmd_opts, sbi);
1037         if (err)
1038                 GOTO(out_free, err);
1039
1040         err = super_setup_bdi_name(sb, "lustre-%p", sb);
1041         if (err)
1042                 GOTO(out_free, err);
1043
1044 #ifndef HAVE_DCACHE_LOCK
1045         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
1046         sb->s_d_op = &ll_d_ops;
1047 #endif
1048         /* Get fsname */
1049         len = strlen(lsi->lsi_lmd->lmd_profile);
1050         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
1051         if (ptr && (strcmp(ptr, "-client") == 0))
1052                 len -= 7;
1053
1054         /* Mount info */
1055         snprintf(name, MAX_STRING_SIZE, "%.*s-%p", len,
1056                  lsi->lsi_lmd->lmd_profile, sb);
1057
1058         /* Call ll_debugfs_register_super() before lustre_process_log()
1059          * so that "llite.*.*" params can be processed correctly.
1060          */
1061         err = ll_debugfs_register_super(sb, name);
1062         if (err < 0) {
1063                 CERROR("%s: could not register mountpoint in llite: rc = %d\n",
1064                        ll_get_fsname(sb, NULL, 0), err);
1065                 err = 0;
1066         }
1067
1068         /* Generate a string unique to this super, in case some joker tries
1069            to mount the same fs at two mount points.
1070            Use the address of the super itself.*/
1071         cfg->cfg_instance = sb;
1072         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
1073         cfg->cfg_callback = class_config_llog_handler;
1074         cfg->cfg_sub_clds = CONFIG_SUB_CLIENT;
1075         /* set up client obds */
1076         err = lustre_process_log(sb, profilenm, cfg);
1077         if (err < 0)
1078                 GOTO(out_proc, err);
1079
1080         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1081         lprof = class_get_profile(profilenm);
1082         if (lprof == NULL) {
1083                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1084                                    " read from the MGS.  Does that filesystem "
1085                                    "exist?\n", profilenm);
1086                 GOTO(out_proc, err = -EINVAL);
1087         }
1088         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1089                lprof->lp_md, lprof->lp_dt);
1090
1091         dt_len = strlen(lprof->lp_dt) + instlen + 2;
1092         OBD_ALLOC(dt, dt_len);
1093         if (!dt)
1094                 GOTO(out_proc, err = -ENOMEM);
1095         snprintf(dt, dt_len - 1, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
1096
1097         md_len = strlen(lprof->lp_md) + instlen + 2;
1098         OBD_ALLOC(md, md_len);
1099         if (!md)
1100                 GOTO(out_proc, err = -ENOMEM);
1101         snprintf(md, md_len - 1, "%s-%p", lprof->lp_md, cfg->cfg_instance);
1102
1103         /* connections, registrations, sb setup */
1104         err = client_common_fill_super(sb, md, dt, mnt);
1105         if (err < 0)
1106                 GOTO(out_proc, err);
1107
1108         sbi->ll_client_common_fill_super_succeeded = 1;
1109
1110 out_proc:
1111         if (err < 0)
1112                 ll_debugfs_unregister_super(sb);
1113 out_free:
1114         if (md)
1115                 OBD_FREE(md, md_len);
1116         if (dt)
1117                 OBD_FREE(dt, dt_len);
1118         if (lprof != NULL)
1119                 class_put_profile(lprof);
1120         if (cfg)
1121                 OBD_FREE_PTR(cfg);
1122         if (err)
1123                 ll_put_super(sb);
1124         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1125                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1126         RETURN(err);
1127 } /* ll_fill_super */
1128
1129 void ll_put_super(struct super_block *sb)
1130 {
1131         struct config_llog_instance cfg, params_cfg;
1132         struct obd_device *obd;
1133         struct lustre_sb_info *lsi = s2lsi(sb);
1134         struct ll_sb_info *sbi = ll_s2sbi(sb);
1135         char *profilenm = get_profile_name(sb);
1136         long ccc_count;
1137         int next, force = 1, rc = 0;
1138         ENTRY;
1139
1140         if (!sbi)
1141                 GOTO(out_no_sbi, 0);
1142
1143         CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1144
1145         cfg.cfg_instance = sb;
1146         lustre_end_log(sb, profilenm, &cfg);
1147
1148         params_cfg.cfg_instance = sb;
1149         lustre_end_log(sb, PARAMS_FILENAME, &params_cfg);
1150
1151         if (sbi->ll_md_exp) {
1152                 obd = class_exp2obd(sbi->ll_md_exp);
1153                 if (obd)
1154                         force = obd->obd_force;
1155         }
1156
1157         /* Wait for unstable pages to be committed to stable storage */
1158         if (force == 0) {
1159                 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
1160                 rc = l_wait_event(sbi->ll_cache->ccc_unstable_waitq,
1161                         atomic_long_read(&sbi->ll_cache->ccc_unstable_nr) == 0,
1162                         &lwi);
1163         }
1164
1165         ccc_count = atomic_long_read(&sbi->ll_cache->ccc_unstable_nr);
1166         if (force == 0 && rc != -EINTR)
1167                 LASSERTF(ccc_count == 0, "count: %li\n", ccc_count);
1168
1169
1170         /* We need to set force before the lov_disconnect in
1171            lustre_common_put_super, since l_d cleans up osc's as well. */
1172         if (force) {
1173                 next = 0;
1174                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1175                                                      &next)) != NULL) {
1176                         obd->obd_force = force;
1177                 }
1178         }
1179
1180         if (sbi->ll_client_common_fill_super_succeeded) {
1181                 /* Only if client_common_fill_super succeeded */
1182                 client_common_put_super(sb);
1183         }
1184
1185         next = 0;
1186         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1187                 class_manual_cleanup(obd);
1188         }
1189
1190         if (sbi->ll_flags & LL_SBI_VERBOSE)
1191                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1192
1193         if (profilenm)
1194                 class_del_profile(profilenm);
1195
1196 #ifndef HAVE_SUPER_SETUP_BDI_NAME
1197         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1198                 bdi_destroy(&lsi->lsi_bdi);
1199                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1200         }
1201 #endif
1202
1203         ll_free_sbi(sb);
1204         lsi->lsi_llsbi = NULL;
1205 out_no_sbi:
1206         lustre_common_put_super(sb);
1207
1208         cl_env_cache_purge(~0);
1209
1210         module_put(THIS_MODULE);
1211
1212         EXIT;
1213 } /* client_put_super */
1214
1215 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1216 {
1217         struct inode *inode = NULL;
1218
1219         /* NOTE: we depend on atomic igrab() -bzzz */
1220         lock_res_and_lock(lock);
1221         if (lock->l_resource->lr_lvb_inode) {
1222                 struct ll_inode_info * lli;
1223                 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1224                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1225                         inode = igrab(lock->l_resource->lr_lvb_inode);
1226                 } else {
1227                         inode = lock->l_resource->lr_lvb_inode;
1228                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1229                                          D_WARNING, lock, "lr_lvb_inode %p is "
1230                                          "bogus: magic %08x",
1231                                          lock->l_resource->lr_lvb_inode,
1232                                          lli->lli_inode_magic);
1233                         inode = NULL;
1234                 }
1235         }
1236         unlock_res_and_lock(lock);
1237         return inode;
1238 }
1239
1240 void ll_dir_clear_lsm_md(struct inode *inode)
1241 {
1242         struct ll_inode_info *lli = ll_i2info(inode);
1243
1244         LASSERT(S_ISDIR(inode->i_mode));
1245
1246         if (lli->lli_lsm_md != NULL) {
1247                 lmv_free_memmd(lli->lli_lsm_md);
1248                 lli->lli_lsm_md = NULL;
1249         }
1250 }
1251
1252 static struct inode *ll_iget_anon_dir(struct super_block *sb,
1253                                       const struct lu_fid *fid,
1254                                       struct lustre_md *md)
1255 {
1256         struct ll_sb_info       *sbi = ll_s2sbi(sb);
1257         struct mdt_body         *body = md->body;
1258         struct inode            *inode;
1259         ino_t                   ino;
1260         ENTRY;
1261
1262         ino = cl_fid_build_ino(fid, sbi->ll_flags & LL_SBI_32BIT_API);
1263         inode = iget_locked(sb, ino);
1264         if (inode == NULL) {
1265                 CERROR("%s: failed get simple inode "DFID": rc = -ENOENT\n",
1266                        ll_get_fsname(sb, NULL, 0), PFID(fid));
1267                 RETURN(ERR_PTR(-ENOENT));
1268         }
1269
1270         if (inode->i_state & I_NEW) {
1271                 struct ll_inode_info *lli = ll_i2info(inode);
1272                 struct lmv_stripe_md *lsm = md->lmv;
1273
1274                 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1275                                 (body->mbo_mode & S_IFMT);
1276                 LASSERTF(S_ISDIR(inode->i_mode), "Not slave inode "DFID"\n",
1277                          PFID(fid));
1278
1279                 LTIME_S(inode->i_mtime) = 0;
1280                 LTIME_S(inode->i_atime) = 0;
1281                 LTIME_S(inode->i_ctime) = 0;
1282                 inode->i_rdev = 0;
1283
1284 #ifdef HAVE_BACKING_DEV_INFO
1285                 /* initializing backing dev info. */
1286                 inode->i_mapping->backing_dev_info =
1287                                                 &s2lsi(inode->i_sb)->lsi_bdi;
1288 #endif
1289                 inode->i_op = &ll_dir_inode_operations;
1290                 inode->i_fop = &ll_dir_operations;
1291                 lli->lli_fid = *fid;
1292                 ll_lli_init(lli);
1293
1294                 LASSERT(lsm != NULL);
1295                 /* master object FID */
1296                 lli->lli_pfid = body->mbo_fid1;
1297                 CDEBUG(D_INODE, "lli %p slave "DFID" master "DFID"\n",
1298                        lli, PFID(fid), PFID(&lli->lli_pfid));
1299                 unlock_new_inode(inode);
1300         }
1301
1302         RETURN(inode);
1303 }
1304
1305 static int ll_init_lsm_md(struct inode *inode, struct lustre_md *md)
1306 {
1307         struct lu_fid *fid;
1308         struct lmv_stripe_md *lsm = md->lmv;
1309         int i;
1310
1311         LASSERT(lsm != NULL);
1312         /* XXX sigh, this lsm_root initialization should be in
1313          * LMV layer, but it needs ll_iget right now, so we
1314          * put this here right now. */
1315         for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
1316                 fid = &lsm->lsm_md_oinfo[i].lmo_fid;
1317                 LASSERT(lsm->lsm_md_oinfo[i].lmo_root == NULL);
1318                 /* Unfortunately ll_iget will call ll_update_inode,
1319                  * where the initialization of slave inode is slightly
1320                  * different, so it reset lsm_md to NULL to avoid
1321                  * initializing lsm for slave inode. */
1322                 /* For migrating inode, master stripe and master object will
1323                  * be same, so we only need assign this inode */
1324                 if (lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION && i == 0)
1325                         lsm->lsm_md_oinfo[i].lmo_root = inode;
1326                 else
1327                         lsm->lsm_md_oinfo[i].lmo_root =
1328                                 ll_iget_anon_dir(inode->i_sb, fid, md);
1329
1330                 if (IS_ERR(lsm->lsm_md_oinfo[i].lmo_root)) {
1331                         int rc = PTR_ERR(lsm->lsm_md_oinfo[i].lmo_root);
1332
1333                         lsm->lsm_md_oinfo[i].lmo_root = NULL;
1334                         return rc;
1335                 }
1336         }
1337
1338         return 0;
1339 }
1340
1341 static inline int lli_lsm_md_eq(const struct lmv_stripe_md *lsm_md1,
1342                                 const struct lmv_stripe_md *lsm_md2)
1343 {
1344         return lsm_md1->lsm_md_magic == lsm_md2->lsm_md_magic &&
1345                lsm_md1->lsm_md_stripe_count == lsm_md2->lsm_md_stripe_count &&
1346                lsm_md1->lsm_md_master_mdt_index ==
1347                                         lsm_md2->lsm_md_master_mdt_index &&
1348                lsm_md1->lsm_md_hash_type == lsm_md2->lsm_md_hash_type &&
1349                lsm_md1->lsm_md_layout_version ==
1350                                         lsm_md2->lsm_md_layout_version &&
1351                strcmp(lsm_md1->lsm_md_pool_name,
1352                       lsm_md2->lsm_md_pool_name) == 0;
1353 }
1354
1355 static int ll_update_lsm_md(struct inode *inode, struct lustre_md *md)
1356 {
1357         struct ll_inode_info *lli = ll_i2info(inode);
1358         struct lmv_stripe_md *lsm = md->lmv;
1359         int     rc;
1360         ENTRY;
1361
1362         LASSERT(S_ISDIR(inode->i_mode));
1363         CDEBUG(D_INODE, "update lsm %p of "DFID"\n", lli->lli_lsm_md,
1364                PFID(ll_inode2fid(inode)));
1365
1366         /* no striped information from request. */
1367         if (lsm == NULL) {
1368                 if (lli->lli_lsm_md == NULL) {
1369                         RETURN(0);
1370                 } else if (lli->lli_lsm_md->lsm_md_hash_type &
1371                                                 LMV_HASH_FLAG_MIGRATION) {
1372                         /* migration is done, the temporay MIGRATE layout has
1373                          * been removed */
1374                         CDEBUG(D_INODE, DFID" finish migration.\n",
1375                                PFID(ll_inode2fid(inode)));
1376                         lmv_free_memmd(lli->lli_lsm_md);
1377                         lli->lli_lsm_md = NULL;
1378                         RETURN(0);
1379                 } else {
1380                         /* The lustre_md from req does not include stripeEA,
1381                          * see ll_md_setattr */
1382                         RETURN(0);
1383                 }
1384         }
1385
1386         /* set the directory layout */
1387         if (lli->lli_lsm_md == NULL) {
1388                 struct cl_attr  *attr;
1389
1390                 rc = ll_init_lsm_md(inode, md);
1391                 if (rc != 0)
1392                         RETURN(rc);
1393
1394                 /* set md->lmv to NULL, so the following free lustre_md
1395                  * will not free this lsm */
1396                 md->lmv = NULL;
1397                 lli->lli_lsm_md = lsm;
1398
1399                 OBD_ALLOC_PTR(attr);
1400                 if (attr == NULL)
1401                         RETURN(-ENOMEM);
1402
1403                 /* validate the lsm */
1404                 rc = md_merge_attr(ll_i2mdexp(inode), lsm, attr,
1405                                    ll_md_blocking_ast);
1406                 if (rc != 0) {
1407                         OBD_FREE_PTR(attr);
1408                         RETURN(rc);
1409                 }
1410
1411                 if (md->body->mbo_valid & OBD_MD_FLNLINK)
1412                         md->body->mbo_nlink = attr->cat_nlink;
1413                 if (md->body->mbo_valid & OBD_MD_FLSIZE)
1414                         md->body->mbo_size = attr->cat_size;
1415                 if (md->body->mbo_valid & OBD_MD_FLATIME)
1416                         md->body->mbo_atime = attr->cat_atime;
1417                 if (md->body->mbo_valid & OBD_MD_FLCTIME)
1418                         md->body->mbo_ctime = attr->cat_ctime;
1419                 if (md->body->mbo_valid & OBD_MD_FLMTIME)
1420                         md->body->mbo_mtime = attr->cat_mtime;
1421
1422                 OBD_FREE_PTR(attr);
1423
1424                 CDEBUG(D_INODE, "Set lsm %p magic %x to "DFID"\n", lsm,
1425                        lsm->lsm_md_magic, PFID(ll_inode2fid(inode)));
1426                 RETURN(0);
1427         }
1428
1429         /* Compare the old and new stripe information */
1430         if (!lsm_md_eq(lli->lli_lsm_md, lsm)) {
1431                 struct lmv_stripe_md    *old_lsm = lli->lli_lsm_md;
1432                 int                     idx;
1433
1434                 CERROR("%s: inode "DFID"(%p)'s lmv layout mismatch (%p)/(%p)"
1435                        "magic:0x%x/0x%x stripe count: %d/%d master_mdt: %d/%d"
1436                        "hash_type:0x%x/0x%x layout: 0x%x/0x%x pool:%s/%s\n",
1437                        ll_get_fsname(inode->i_sb, NULL, 0), PFID(&lli->lli_fid),
1438                        inode, lsm, old_lsm,
1439                        lsm->lsm_md_magic, old_lsm->lsm_md_magic,
1440                        lsm->lsm_md_stripe_count,
1441                        old_lsm->lsm_md_stripe_count,
1442                        lsm->lsm_md_master_mdt_index,
1443                        old_lsm->lsm_md_master_mdt_index,
1444                        lsm->lsm_md_hash_type, old_lsm->lsm_md_hash_type,
1445                        lsm->lsm_md_layout_version,
1446                        old_lsm->lsm_md_layout_version,
1447                        lsm->lsm_md_pool_name,
1448                        old_lsm->lsm_md_pool_name);
1449
1450                 for (idx = 0; idx < old_lsm->lsm_md_stripe_count; idx++) {
1451                         CERROR("%s: sub FIDs in old lsm idx %d, old: "DFID"\n",
1452                                ll_get_fsname(inode->i_sb, NULL, 0), idx,
1453                                PFID(&old_lsm->lsm_md_oinfo[idx].lmo_fid));
1454                 }
1455
1456                 for (idx = 0; idx < lsm->lsm_md_stripe_count; idx++) {
1457                         CERROR("%s: sub FIDs in new lsm idx %d, new: "DFID"\n",
1458                                ll_get_fsname(inode->i_sb, NULL, 0), idx,
1459                                PFID(&lsm->lsm_md_oinfo[idx].lmo_fid));
1460                 }
1461
1462                 RETURN(-EIO);
1463         }
1464
1465         RETURN(0);
1466 }
1467
1468 void ll_clear_inode(struct inode *inode)
1469 {
1470         struct ll_inode_info *lli = ll_i2info(inode);
1471         struct ll_sb_info *sbi = ll_i2sbi(inode);
1472         ENTRY;
1473
1474         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1475                PFID(ll_inode2fid(inode)), inode);
1476
1477         if (S_ISDIR(inode->i_mode)) {
1478                 /* these should have been cleared in ll_file_release */
1479                 LASSERT(lli->lli_opendir_key == NULL);
1480                 LASSERT(lli->lli_sai == NULL);
1481                 LASSERT(lli->lli_opendir_pid == 0);
1482         }
1483
1484         md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1485
1486         LASSERT(!lli->lli_open_fd_write_count);
1487         LASSERT(!lli->lli_open_fd_read_count);
1488         LASSERT(!lli->lli_open_fd_exec_count);
1489
1490         if (lli->lli_mds_write_och)
1491                 ll_md_real_close(inode, FMODE_WRITE);
1492         if (lli->lli_mds_exec_och)
1493                 ll_md_real_close(inode, FMODE_EXEC);
1494         if (lli->lli_mds_read_och)
1495                 ll_md_real_close(inode, FMODE_READ);
1496
1497         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1498                 OBD_FREE(lli->lli_symlink_name,
1499                          strlen(lli->lli_symlink_name) + 1);
1500                 lli->lli_symlink_name = NULL;
1501         }
1502
1503         ll_xattr_cache_destroy(inode);
1504
1505 #ifdef CONFIG_FS_POSIX_ACL
1506         forget_all_cached_acls(inode);
1507         if (lli->lli_posix_acl) {
1508                 LASSERT(atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1509                 posix_acl_release(lli->lli_posix_acl);
1510                 lli->lli_posix_acl = NULL;
1511         }
1512 #endif
1513         lli->lli_inode_magic = LLI_INODE_DEAD;
1514
1515         if (S_ISDIR(inode->i_mode))
1516                 ll_dir_clear_lsm_md(inode);
1517         else if (S_ISREG(inode->i_mode) && !is_bad_inode(inode))
1518                 LASSERT(list_empty(&lli->lli_agl_list));
1519
1520         /*
1521          * XXX This has to be done before lsm is freed below, because
1522          * cl_object still uses inode lsm.
1523          */
1524         cl_inode_fini(inode);
1525
1526         EXIT;
1527 }
1528
1529 static int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data)
1530 {
1531         struct lustre_md md;
1532         struct inode *inode = dentry->d_inode;
1533         struct ll_sb_info *sbi = ll_i2sbi(inode);
1534         struct ptlrpc_request *request = NULL;
1535         int rc, ia_valid;
1536         ENTRY;
1537
1538         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1539                                      LUSTRE_OPC_ANY, NULL);
1540         if (IS_ERR(op_data))
1541                 RETURN(PTR_ERR(op_data));
1542
1543         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &request);
1544         if (rc) {
1545                 ptlrpc_req_finished(request);
1546                 if (rc == -ENOENT) {
1547                         clear_nlink(inode);
1548                         /* Unlinked special device node? Or just a race?
1549                          * Pretend we done everything. */
1550                         if (!S_ISREG(inode->i_mode) &&
1551                             !S_ISDIR(inode->i_mode)) {
1552                                 ia_valid = op_data->op_attr.ia_valid;
1553                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1554                                 rc = simple_setattr(dentry, &op_data->op_attr);
1555                                 op_data->op_attr.ia_valid = ia_valid;
1556                         }
1557                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1558                         CERROR("md_setattr fails: rc = %d\n", rc);
1559                 }
1560                 RETURN(rc);
1561         }
1562
1563         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1564                               sbi->ll_md_exp, &md);
1565         if (rc) {
1566                 ptlrpc_req_finished(request);
1567                 RETURN(rc);
1568         }
1569
1570         ia_valid = op_data->op_attr.ia_valid;
1571         /* inode size will be in ll_setattr_ost, can't do it now since dirty
1572          * cache is not cleared yet. */
1573         op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1574         if (S_ISREG(inode->i_mode))
1575                 inode_lock(inode);
1576         rc = simple_setattr(dentry, &op_data->op_attr);
1577         if (S_ISREG(inode->i_mode))
1578                 inode_unlock(inode);
1579         op_data->op_attr.ia_valid = ia_valid;
1580
1581         rc = ll_update_inode(inode, &md);
1582         ptlrpc_req_finished(request);
1583
1584         RETURN(rc);
1585 }
1586
1587 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1588  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1589  * keep these values until such a time that objects are allocated for it.
1590  * We do the MDS operations first, as it is checking permissions for us.
1591  * We don't to the MDS RPC if there is nothing that we want to store there,
1592  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1593  * going to do an RPC anyways.
1594  *
1595  * If we are doing a truncate, we will send the mtime and ctime updates
1596  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1597  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1598  * at the same time.
1599  *
1600  * In case of HSMimport, we only set attr on MDS.
1601  */
1602 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr, bool hsm_import)
1603 {
1604         struct inode *inode = dentry->d_inode;
1605         struct ll_inode_info *lli = ll_i2info(inode);
1606         struct md_op_data *op_data = NULL;
1607         int rc = 0;
1608         ENTRY;
1609
1610         CDEBUG(D_VFSTRACE, "%s: setattr inode "DFID"(%p) from %llu to %llu, "
1611                "valid %x, hsm_import %d\n",
1612                ll_get_fsname(inode->i_sb, NULL, 0), PFID(&lli->lli_fid),
1613                inode, i_size_read(inode), attr->ia_size, attr->ia_valid,
1614                hsm_import);
1615
1616         if (attr->ia_valid & ATTR_SIZE) {
1617                 /* Check new size against VFS/VM file size limit and rlimit */
1618                 rc = inode_newsize_ok(inode, attr->ia_size);
1619                 if (rc)
1620                         RETURN(rc);
1621
1622                 /* The maximum Lustre file size is variable, based on the
1623                  * OST maximum object size and number of stripes.  This
1624                  * needs another check in addition to the VFS check above. */
1625                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1626                         CDEBUG(D_INODE,"file "DFID" too large %llu > %llu\n",
1627                                PFID(&lli->lli_fid), attr->ia_size,
1628                                ll_file_maxbytes(inode));
1629                         RETURN(-EFBIG);
1630                 }
1631
1632                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1633         }
1634
1635         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1636         if (attr->ia_valid & TIMES_SET_FLAGS) {
1637                 if ((!uid_eq(current_fsuid(), inode->i_uid)) &&
1638                     !cfs_capable(CFS_CAP_FOWNER))
1639                         RETURN(-EPERM);
1640         }
1641
1642         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1643         if (!(attr->ia_valid & ATTR_CTIME_SET) &&
1644             (attr->ia_valid & ATTR_CTIME)) {
1645                 attr->ia_ctime = current_time(inode);
1646                 attr->ia_valid |= ATTR_CTIME_SET;
1647         }
1648         if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1649             (attr->ia_valid & ATTR_ATIME)) {
1650                 attr->ia_atime = current_time(inode);
1651                 attr->ia_valid |= ATTR_ATIME_SET;
1652         }
1653         if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1654             (attr->ia_valid & ATTR_MTIME)) {
1655                 attr->ia_mtime = current_time(inode);
1656                 attr->ia_valid |= ATTR_MTIME_SET;
1657         }
1658
1659         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1660                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %llu\n",
1661                        LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1662                        (s64)ktime_get_real_seconds());
1663
1664         if (S_ISREG(inode->i_mode)) {
1665                 if (attr->ia_valid & ATTR_SIZE)
1666                         inode_dio_write_done(inode);
1667                 inode_unlock(inode);
1668         }
1669
1670         /* We always do an MDS RPC, even if we're only changing the size;
1671          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1672
1673         OBD_ALLOC_PTR(op_data);
1674         if (op_data == NULL)
1675                 GOTO(out, rc = -ENOMEM);
1676
1677         if (!hsm_import && attr->ia_valid & ATTR_SIZE) {
1678                 /* If we are changing file size, file content is
1679                  * modified, flag it. */
1680                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1681                 op_data->op_bias |= MDS_DATA_MODIFIED;
1682                 ll_file_clear_flag(lli, LLIF_DATA_MODIFIED);
1683         }
1684
1685         op_data->op_attr = *attr;
1686
1687         rc = ll_md_setattr(dentry, op_data);
1688         if (rc)
1689                 GOTO(out, rc);
1690
1691         if (!S_ISREG(inode->i_mode) || hsm_import)
1692                 GOTO(out, rc = 0);
1693
1694         if (attr->ia_valid & (ATTR_SIZE |
1695                               ATTR_ATIME | ATTR_ATIME_SET |
1696                               ATTR_MTIME | ATTR_MTIME_SET |
1697                               ATTR_CTIME | ATTR_CTIME_SET)) {
1698                 /* For truncate and utimes sending attributes to OSTs, setting
1699                  * mtime/atime to the past will be performed under PW [0:EOF]
1700                  * extent lock (new_size:EOF for truncate).  It may seem
1701                  * excessive to send mtime/atime updates to OSTs when not
1702                  * setting times to past, but it is necessary due to possible
1703                  * time de-synchronization between MDT inode and OST objects */
1704                 rc = cl_setattr_ost(lli->lli_clob, attr, 0);
1705         }
1706
1707         /* If the file was restored, it needs to set dirty flag.
1708          *
1709          * We've already sent MDS_DATA_MODIFIED flag in
1710          * ll_md_setattr() for truncate. However, the MDT refuses to
1711          * set the HS_DIRTY flag on released files, so we have to set
1712          * it again if the file has been restored. Please check how
1713          * LLIF_DATA_MODIFIED is set in vvp_io_setattr_fini().
1714          *
1715          * Please notice that if the file is not released, the previous
1716          * MDS_DATA_MODIFIED has taken effect and usually
1717          * LLIF_DATA_MODIFIED is not set(see vvp_io_setattr_fini()).
1718          * This way we can save an RPC for common open + trunc
1719          * operation. */
1720         if (ll_file_test_and_clear_flag(lli, LLIF_DATA_MODIFIED)) {
1721                 struct hsm_state_set hss = {
1722                         .hss_valid = HSS_SETMASK,
1723                         .hss_setmask = HS_DIRTY,
1724                 };
1725                 int rc2;
1726
1727                 rc2 = ll_hsm_state_set(inode, &hss);
1728                 /* truncate and write can happen at the same time, so that
1729                  * the file can be set modified even though the file is not
1730                  * restored from released state, and ll_hsm_state_set() is
1731                  * not applicable for the file, and rc2 < 0 is normal in this
1732                  * case. */
1733                 if (rc2 < 0)
1734                         CDEBUG(D_INFO, DFID "HSM set dirty failed: rc2 = %d\n",
1735                                PFID(ll_inode2fid(inode)), rc2);
1736         }
1737
1738         EXIT;
1739 out:
1740         if (op_data != NULL)
1741                 ll_finish_md_op_data(op_data);
1742
1743         if (S_ISREG(inode->i_mode)) {
1744                 inode_lock(inode);
1745                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1746                         inode_dio_wait(inode);
1747                 /* Once we've got the i_mutex, it's safe to set the S_NOSEC
1748                  * flag.  ll_update_inode (called from ll_md_setattr), clears
1749                  * inode flags, so there is a gap where S_NOSEC is not set.
1750                  * This can cause a writer to take the i_mutex unnecessarily,
1751                  * but this is safe to do and should be rare. */
1752                 inode_has_no_xattr(inode);
1753         }
1754
1755         ll_stats_ops_tally(ll_i2sbi(inode), (attr->ia_valid & ATTR_SIZE) ?
1756                         LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1757
1758         return rc;
1759 }
1760
1761 int ll_setattr(struct dentry *de, struct iattr *attr)
1762 {
1763         int mode = de->d_inode->i_mode;
1764
1765         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1766                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1767                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1768
1769         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1770                                (ATTR_SIZE|ATTR_MODE)) &&
1771             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1772              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1773               !(attr->ia_mode & S_ISGID))))
1774                 attr->ia_valid |= ATTR_FORCE;
1775
1776         if ((attr->ia_valid & ATTR_MODE) &&
1777             (mode & S_ISUID) &&
1778             !(attr->ia_mode & S_ISUID) &&
1779             !(attr->ia_valid & ATTR_KILL_SUID))
1780                 attr->ia_valid |= ATTR_KILL_SUID;
1781
1782         if ((attr->ia_valid & ATTR_MODE) &&
1783             ((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1784             !(attr->ia_mode & S_ISGID) &&
1785             !(attr->ia_valid & ATTR_KILL_SGID))
1786                 attr->ia_valid |= ATTR_KILL_SGID;
1787
1788         /* avoid polluted from ATTR_TIMES_SET,
1789          * projid is not expected to be set here */
1790         attr->ia_valid &= ~MDS_ATTR_PROJID;
1791
1792         return ll_setattr_raw(de, attr, false);
1793 }
1794
1795 int ll_statfs_internal(struct ll_sb_info *sbi, struct obd_statfs *osfs,
1796                        u32 flags)
1797 {
1798         struct obd_statfs obd_osfs;
1799         time64_t max_age;
1800         int rc;
1801
1802         ENTRY;
1803         max_age = ktime_get_seconds() - OBD_STATFS_CACHE_SECONDS;
1804
1805         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1806         if (rc) {
1807                 CERROR("md_statfs fails: rc = %d\n", rc);
1808                 RETURN(rc);
1809         }
1810
1811         osfs->os_type = LL_SUPER_MAGIC;
1812
1813         CDEBUG(D_SUPER, "MDC blocks %llu/%llu objects %llu/%llu\n",
1814                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,osfs->os_files);
1815
1816         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1817                 flags |= OBD_STATFS_NODELAY;
1818
1819         rc = obd_statfs(NULL, sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1820         if (rc) {
1821                 CERROR("obd_statfs fails: rc = %d\n", rc);
1822                 RETURN(rc);
1823         }
1824
1825         CDEBUG(D_SUPER, "OSC blocks %llu/%llu objects %llu/%llu\n",
1826                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1827                obd_osfs.os_files);
1828
1829         osfs->os_bsize = obd_osfs.os_bsize;
1830         osfs->os_blocks = obd_osfs.os_blocks;
1831         osfs->os_bfree = obd_osfs.os_bfree;
1832         osfs->os_bavail = obd_osfs.os_bavail;
1833
1834         /* If we don't have as many objects free on the OST as inodes
1835          * on the MDS, we reduce the total number of inodes to
1836          * compensate, so that the "inodes in use" number is correct.
1837          */
1838         if (obd_osfs.os_ffree < osfs->os_ffree) {
1839                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1840                         obd_osfs.os_ffree;
1841                 osfs->os_ffree = obd_osfs.os_ffree;
1842         }
1843
1844         RETURN(rc);
1845 }
1846 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1847 {
1848         struct super_block *sb = de->d_sb;
1849         struct obd_statfs osfs;
1850         __u64 fsid = huge_encode_dev(sb->s_dev);
1851         int rc;
1852
1853         CDEBUG(D_VFSTRACE, "VFS Op: at %llu jiffies\n", get_jiffies_64());
1854         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1855
1856         /* Some amount of caching on the client is allowed */
1857         rc = ll_statfs_internal(ll_s2sbi(sb), &osfs, 0);
1858         if (rc)
1859                 return rc;
1860
1861         statfs_unpack(sfs, &osfs);
1862
1863         /* We need to downshift for all 32-bit kernels, because we can't
1864          * tell if the kernel is being called via sys_statfs64() or not.
1865          * Stop before overflowing f_bsize - in which case it is better
1866          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1867         if (sizeof(long) < 8) {
1868                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1869                         sfs->f_bsize <<= 1;
1870
1871                         osfs.os_blocks >>= 1;
1872                         osfs.os_bfree >>= 1;
1873                         osfs.os_bavail >>= 1;
1874                 }
1875         }
1876
1877         sfs->f_blocks = osfs.os_blocks;
1878         sfs->f_bfree = osfs.os_bfree;
1879         sfs->f_bavail = osfs.os_bavail;
1880         sfs->f_fsid.val[0] = (__u32)fsid;
1881         sfs->f_fsid.val[1] = (__u32)(fsid >> 32);
1882         return 0;
1883 }
1884
1885 void ll_inode_size_lock(struct inode *inode)
1886 {
1887         struct ll_inode_info *lli;
1888
1889         LASSERT(!S_ISDIR(inode->i_mode));
1890
1891         lli = ll_i2info(inode);
1892         mutex_lock(&lli->lli_size_mutex);
1893 }
1894
1895 void ll_inode_size_unlock(struct inode *inode)
1896 {
1897         struct ll_inode_info *lli;
1898
1899         lli = ll_i2info(inode);
1900         mutex_unlock(&lli->lli_size_mutex);
1901 }
1902
1903 int ll_update_inode(struct inode *inode, struct lustre_md *md)
1904 {
1905         struct ll_inode_info *lli = ll_i2info(inode);
1906         struct mdt_body *body = md->body;
1907         struct ll_sb_info *sbi = ll_i2sbi(inode);
1908         int rc = 0;
1909
1910         if (body->mbo_valid & OBD_MD_FLEASIZE) {
1911                 rc = cl_file_inode_init(inode, md);
1912                 if (rc)
1913                         return rc;
1914         }
1915
1916         if (S_ISDIR(inode->i_mode)) {
1917                 rc = ll_update_lsm_md(inode, md);
1918                 if (rc != 0)
1919                         return rc;
1920         }
1921
1922 #ifdef CONFIG_FS_POSIX_ACL
1923         if (body->mbo_valid & OBD_MD_FLACL) {
1924                 spin_lock(&lli->lli_lock);
1925                 if (lli->lli_posix_acl)
1926                         posix_acl_release(lli->lli_posix_acl);
1927                 lli->lli_posix_acl = md->posix_acl;
1928                 spin_unlock(&lli->lli_lock);
1929         }
1930 #endif
1931         inode->i_ino = cl_fid_build_ino(&body->mbo_fid1,
1932                                         sbi->ll_flags & LL_SBI_32BIT_API);
1933         inode->i_generation = cl_fid_build_gen(&body->mbo_fid1);
1934
1935         if (body->mbo_valid & OBD_MD_FLATIME) {
1936                 if (body->mbo_atime > LTIME_S(inode->i_atime))
1937                         LTIME_S(inode->i_atime) = body->mbo_atime;
1938                 lli->lli_atime = body->mbo_atime;
1939         }
1940
1941         if (body->mbo_valid & OBD_MD_FLMTIME) {
1942                 if (body->mbo_mtime > LTIME_S(inode->i_mtime)) {
1943                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
1944                                "to %llu\n", inode->i_ino,
1945                                LTIME_S(inode->i_mtime), body->mbo_mtime);
1946                         LTIME_S(inode->i_mtime) = body->mbo_mtime;
1947                 }
1948                 lli->lli_mtime = body->mbo_mtime;
1949         }
1950
1951         if (body->mbo_valid & OBD_MD_FLCTIME) {
1952                 if (body->mbo_ctime > LTIME_S(inode->i_ctime))
1953                         LTIME_S(inode->i_ctime) = body->mbo_ctime;
1954                 lli->lli_ctime = body->mbo_ctime;
1955         }
1956
1957         /* Clear i_flags to remove S_NOSEC before permissions are updated */
1958         if (body->mbo_valid & OBD_MD_FLFLAGS)
1959                 inode->i_flags = ll_ext_to_inode_flags(body->mbo_flags);
1960         if (body->mbo_valid & OBD_MD_FLMODE)
1961                 inode->i_mode = (inode->i_mode & S_IFMT) |
1962                                 (body->mbo_mode & ~S_IFMT);
1963
1964         if (body->mbo_valid & OBD_MD_FLTYPE)
1965                 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1966                                 (body->mbo_mode & S_IFMT);
1967
1968         LASSERT(inode->i_mode != 0);
1969         if (S_ISREG(inode->i_mode))
1970                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1,
1971                                        LL_MAX_BLKSIZE_BITS);
1972         else
1973                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1974
1975         if (body->mbo_valid & OBD_MD_FLUID)
1976                 inode->i_uid = make_kuid(&init_user_ns, body->mbo_uid);
1977         if (body->mbo_valid & OBD_MD_FLGID)
1978                 inode->i_gid = make_kgid(&init_user_ns, body->mbo_gid);
1979         if (body->mbo_valid & OBD_MD_FLPROJID)
1980                 lli->lli_projid = body->mbo_projid;
1981         if (body->mbo_valid & OBD_MD_FLNLINK)
1982                 set_nlink(inode, body->mbo_nlink);
1983         if (body->mbo_valid & OBD_MD_FLRDEV)
1984                 inode->i_rdev = old_decode_dev(body->mbo_rdev);
1985
1986         if (body->mbo_valid & OBD_MD_FLID) {
1987                 /* FID shouldn't be changed! */
1988                 if (fid_is_sane(&lli->lli_fid)) {
1989                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->mbo_fid1),
1990                                  "Trying to change FID "DFID
1991                                  " to the "DFID", inode "DFID"(%p)\n",
1992                                  PFID(&lli->lli_fid), PFID(&body->mbo_fid1),
1993                                  PFID(ll_inode2fid(inode)), inode);
1994                 } else {
1995                         lli->lli_fid = body->mbo_fid1;
1996                 }
1997         }
1998
1999         LASSERT(fid_seq(&lli->lli_fid) != 0);
2000
2001         if (body->mbo_valid & OBD_MD_FLSIZE) {
2002                 i_size_write(inode, body->mbo_size);
2003
2004                 CDEBUG(D_VFSTRACE, "inode="DFID", updating i_size %llu\n",
2005                        PFID(ll_inode2fid(inode)),
2006                        (unsigned long long)body->mbo_size);
2007
2008                 if (body->mbo_valid & OBD_MD_FLBLOCKS)
2009                         inode->i_blocks = body->mbo_blocks;
2010         }
2011
2012         if (body->mbo_valid & OBD_MD_TSTATE) {
2013                 /* Set LLIF_FILE_RESTORING if restore ongoing and
2014                  * clear it when done to ensure to start again
2015                  * glimpsing updated attrs
2016                  */
2017                 if (body->mbo_t_state & MS_RESTORE)
2018                         ll_file_set_flag(lli, LLIF_FILE_RESTORING);
2019                 else
2020                         ll_file_clear_flag(lli, LLIF_FILE_RESTORING);
2021         }
2022
2023         return 0;
2024 }
2025
2026 int ll_read_inode2(struct inode *inode, void *opaque)
2027 {
2028         struct lustre_md *md = opaque;
2029         struct ll_inode_info *lli = ll_i2info(inode);
2030         int     rc;
2031         ENTRY;
2032
2033         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
2034                PFID(&lli->lli_fid), inode);
2035
2036         /* Core attributes from the MDS first.  This is a new inode, and
2037          * the VFS doesn't zero times in the core inode so we have to do
2038          * it ourselves.  They will be overwritten by either MDS or OST
2039          * attributes - we just need to make sure they aren't newer. */
2040         LTIME_S(inode->i_mtime) = 0;
2041         LTIME_S(inode->i_atime) = 0;
2042         LTIME_S(inode->i_ctime) = 0;
2043         inode->i_rdev = 0;
2044         rc = ll_update_inode(inode, md);
2045         if (rc != 0)
2046                 RETURN(rc);
2047
2048         /* OIDEBUG(inode); */
2049
2050 #ifdef HAVE_BACKING_DEV_INFO
2051         /* initializing backing dev info. */
2052         inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
2053 #endif
2054         if (S_ISREG(inode->i_mode)) {
2055                 struct ll_sb_info *sbi = ll_i2sbi(inode);
2056                 inode->i_op = &ll_file_inode_operations;
2057                 inode->i_fop = sbi->ll_fop;
2058                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
2059                 EXIT;
2060         } else if (S_ISDIR(inode->i_mode)) {
2061                 inode->i_op = &ll_dir_inode_operations;
2062                 inode->i_fop = &ll_dir_operations;
2063                 EXIT;
2064         } else if (S_ISLNK(inode->i_mode)) {
2065                 inode->i_op = &ll_fast_symlink_inode_operations;
2066                 EXIT;
2067         } else {
2068                 inode->i_op = &ll_special_inode_operations;
2069
2070                 init_special_inode(inode, inode->i_mode,
2071                                    inode->i_rdev);
2072
2073                 EXIT;
2074         }
2075
2076         return 0;
2077 }
2078
2079 void ll_delete_inode(struct inode *inode)
2080 {
2081         struct ll_inode_info *lli = ll_i2info(inode);
2082         ENTRY;
2083
2084         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
2085                 /* It is last chance to write out dirty pages,
2086                  * otherwise we may lose data while umount */
2087                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF, CL_FSYNC_LOCAL, 1);
2088
2089         truncate_inode_pages_final(&inode->i_data);
2090
2091         LASSERTF(inode->i_data.nrpages == 0, "inode="DFID"(%p) nrpages=%lu, "
2092                  "see https://jira.hpdd.intel.com/browse/LU-118\n",
2093                  PFID(ll_inode2fid(inode)), inode, inode->i_data.nrpages);
2094
2095 #ifdef HAVE_SBOPS_EVICT_INODE
2096         ll_clear_inode(inode);
2097 #endif
2098         clear_inode(inode);
2099
2100         EXIT;
2101 }
2102
2103 int ll_iocontrol(struct inode *inode, struct file *file,
2104                  unsigned int cmd, unsigned long arg)
2105 {
2106         struct ll_sb_info *sbi = ll_i2sbi(inode);
2107         struct ptlrpc_request *req = NULL;
2108         int rc, flags = 0;
2109         ENTRY;
2110
2111         switch (cmd) {
2112         case FS_IOC_GETFLAGS: {
2113                 struct mdt_body *body;
2114                 struct md_op_data *op_data;
2115
2116                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
2117                                              0, 0, LUSTRE_OPC_ANY,
2118                                              NULL);
2119                 if (IS_ERR(op_data))
2120                         RETURN(PTR_ERR(op_data));
2121
2122                 op_data->op_valid = OBD_MD_FLFLAGS;
2123                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
2124                 ll_finish_md_op_data(op_data);
2125                 if (rc) {
2126                         CERROR("%s: failure inode "DFID": rc = %d\n",
2127                                sbi->ll_md_exp->exp_obd->obd_name,
2128                                PFID(ll_inode2fid(inode)), rc);
2129                         RETURN(-abs(rc));
2130                 }
2131
2132                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
2133
2134                 flags = body->mbo_flags;
2135
2136                 ptlrpc_req_finished(req);
2137
2138                 RETURN(put_user(flags, (int __user *)arg));
2139         }
2140         case FS_IOC_SETFLAGS: {
2141                 struct iattr *attr;
2142                 struct md_op_data *op_data;
2143                 struct cl_object *obj;
2144
2145                 if (get_user(flags, (int __user *)arg))
2146                         RETURN(-EFAULT);
2147
2148                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
2149                                              LUSTRE_OPC_ANY, NULL);
2150                 if (IS_ERR(op_data))
2151                         RETURN(PTR_ERR(op_data));
2152
2153                 op_data->op_attr_flags = flags;
2154                 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
2155                 rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &req);
2156                 ll_finish_md_op_data(op_data);
2157                 ptlrpc_req_finished(req);
2158                 if (rc)
2159                         RETURN(rc);
2160
2161                 inode->i_flags = ll_ext_to_inode_flags(flags);
2162
2163                 obj = ll_i2info(inode)->lli_clob;
2164                 if (obj == NULL)
2165                         RETURN(0);
2166
2167                 OBD_ALLOC_PTR(attr);
2168                 if (attr == NULL)
2169                         RETURN(-ENOMEM);
2170
2171                 attr->ia_valid = ATTR_ATTR_FLAG;
2172                 rc = cl_setattr_ost(obj, attr, flags);
2173
2174                 OBD_FREE_PTR(attr);
2175                 RETURN(rc);
2176         }
2177         default:
2178                 RETURN(-ENOSYS);
2179         }
2180
2181         RETURN(0);
2182 }
2183
2184 int ll_flush_ctx(struct inode *inode)
2185 {
2186         struct ll_sb_info  *sbi = ll_i2sbi(inode);
2187
2188         CDEBUG(D_SEC, "flush context for user %d\n",
2189                from_kuid(&init_user_ns, current_uid()));
2190
2191         obd_set_info_async(NULL, sbi->ll_md_exp,
2192                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2193                            0, NULL, NULL);
2194         obd_set_info_async(NULL, sbi->ll_dt_exp,
2195                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2196                            0, NULL, NULL);
2197         return 0;
2198 }
2199
2200 /* umount -f client means force down, don't save state */
2201 void ll_umount_begin(struct super_block *sb)
2202 {
2203         struct ll_sb_info *sbi = ll_s2sbi(sb);
2204         struct obd_device *obd;
2205         struct obd_ioctl_data *ioc_data;
2206         struct l_wait_info lwi;
2207         wait_queue_head_t waitq;
2208         ENTRY;
2209
2210         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2211                sb->s_count, atomic_read(&sb->s_active));
2212
2213         obd = class_exp2obd(sbi->ll_md_exp);
2214         if (obd == NULL) {
2215                 CERROR("Invalid MDC connection handle %#llx\n",
2216                        sbi->ll_md_exp->exp_handle.h_cookie);
2217                 EXIT;
2218                 return;
2219         }
2220         obd->obd_force = 1;
2221
2222         obd = class_exp2obd(sbi->ll_dt_exp);
2223         if (obd == NULL) {
2224                 CERROR("Invalid LOV connection handle %#llx\n",
2225                        sbi->ll_dt_exp->exp_handle.h_cookie);
2226                 EXIT;
2227                 return;
2228         }
2229         obd->obd_force = 1;
2230
2231         OBD_ALLOC_PTR(ioc_data);
2232         if (ioc_data) {
2233                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2234                               sizeof *ioc_data, ioc_data, NULL);
2235
2236                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2237                               sizeof *ioc_data, ioc_data, NULL);
2238
2239                 OBD_FREE_PTR(ioc_data);
2240         }
2241
2242         /* Really, we'd like to wait until there are no requests outstanding,
2243          * and then continue.  For now, we just periodically checking for vfs
2244          * to decrement mnt_cnt and hope to finish it within 10sec.
2245          */
2246         init_waitqueue_head(&waitq);
2247         lwi = LWI_TIMEOUT_INTERVAL(cfs_time_seconds(10),
2248                                    cfs_time_seconds(1), NULL, NULL);
2249         l_wait_event(waitq, may_umount(sbi->ll_mnt.mnt), &lwi);
2250
2251         EXIT;
2252 }
2253
2254 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2255 {
2256         struct ll_sb_info *sbi = ll_s2sbi(sb);
2257         char *profilenm = get_profile_name(sb);
2258         int err;
2259         __u32 read_only;
2260
2261         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2262                 read_only = *flags & MS_RDONLY;
2263                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2264                                          sizeof(KEY_READ_ONLY),
2265                                          KEY_READ_ONLY, sizeof(read_only),
2266                                          &read_only, NULL);
2267                 if (err) {
2268                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2269                                       profilenm, read_only ?
2270                                       "read-only" : "read-write", err);
2271                         return err;
2272                 }
2273
2274                 if (read_only)
2275                         sb->s_flags |= MS_RDONLY;
2276                 else
2277                         sb->s_flags &= ~MS_RDONLY;
2278
2279                 if (sbi->ll_flags & LL_SBI_VERBOSE)
2280                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2281                                       read_only ?  "read-only" : "read-write");
2282         }
2283         return 0;
2284 }
2285
2286 /**
2287  * Cleanup the open handle that is cached on MDT-side.
2288  *
2289  * For open case, the client side open handling thread may hit error
2290  * after the MDT grant the open. Under such case, the client should
2291  * send close RPC to the MDT as cleanup; otherwise, the open handle
2292  * on the MDT will be leaked there until the client umount or evicted.
2293  *
2294  * In further, if someone unlinked the file, because the open handle
2295  * holds the reference on such file/object, then it will block the
2296  * subsequent threads that want to locate such object via FID.
2297  *
2298  * \param[in] sb        super block for this file-system
2299  * \param[in] open_req  pointer to the original open request
2300  */
2301 void ll_open_cleanup(struct super_block *sb, struct ptlrpc_request *open_req)
2302 {
2303         struct mdt_body                 *body;
2304         struct md_op_data               *op_data;
2305         struct ptlrpc_request           *close_req = NULL;
2306         struct obd_export               *exp       = ll_s2sbi(sb)->ll_md_exp;
2307         ENTRY;
2308
2309         body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
2310         OBD_ALLOC_PTR(op_data);
2311         if (op_data == NULL) {
2312                 CWARN("%s: cannot allocate op_data to release open handle for "
2313                       DFID"\n",
2314                       ll_get_fsname(sb, NULL, 0), PFID(&body->mbo_fid1));
2315
2316                 RETURN_EXIT;
2317         }
2318
2319         op_data->op_fid1 = body->mbo_fid1;
2320         op_data->op_handle = body->mbo_handle;
2321         op_data->op_mod_time = ktime_get_real_seconds();
2322         md_close(exp, op_data, NULL, &close_req);
2323         ptlrpc_req_finished(close_req);
2324         ll_finish_md_op_data(op_data);
2325
2326         EXIT;
2327 }
2328
2329 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2330                   struct super_block *sb, struct lookup_intent *it)
2331 {
2332         struct ll_sb_info *sbi = NULL;
2333         struct lustre_md md = { NULL };
2334         int rc;
2335         ENTRY;
2336
2337         LASSERT(*inode || sb);
2338         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2339         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2340                               sbi->ll_md_exp, &md);
2341         if (rc != 0)
2342                 GOTO(cleanup, rc);
2343
2344         if (*inode) {
2345                 rc = ll_update_inode(*inode, &md);
2346                 if (rc != 0)
2347                         GOTO(out, rc);
2348         } else {
2349                 LASSERT(sb != NULL);
2350
2351                 /*
2352                  * At this point server returns to client's same fid as client
2353                  * generated for creating. So using ->fid1 is okay here.
2354                  */
2355                 if (!fid_is_sane(&md.body->mbo_fid1)) {
2356                         CERROR("%s: Fid is insane "DFID"\n",
2357                                 ll_get_fsname(sb, NULL, 0),
2358                                 PFID(&md.body->mbo_fid1));
2359                         GOTO(out, rc = -EINVAL);
2360                 }
2361
2362                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->mbo_fid1,
2363                                              sbi->ll_flags & LL_SBI_32BIT_API),
2364                                  &md);
2365                 if (IS_ERR(*inode)) {
2366 #ifdef CONFIG_FS_POSIX_ACL
2367                         if (md.posix_acl) {
2368                                 posix_acl_release(md.posix_acl);
2369                                 md.posix_acl = NULL;
2370                         }
2371 #endif
2372                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2373                         *inode = NULL;
2374                         CERROR("new_inode -fatal: rc %d\n", rc);
2375                         GOTO(out, rc);
2376                 }
2377         }
2378
2379         /* Handling piggyback layout lock.
2380          * Layout lock can be piggybacked by getattr and open request.
2381          * The lsm can be applied to inode only if it comes with a layout lock
2382          * otherwise correct layout may be overwritten, for example:
2383          * 1. proc1: mdt returns a lsm but not granting layout
2384          * 2. layout was changed by another client
2385          * 3. proc2: refresh layout and layout lock granted
2386          * 4. proc1: to apply a stale layout */
2387         if (it != NULL && it->it_lock_mode != 0) {
2388                 struct lustre_handle lockh;
2389                 struct ldlm_lock *lock;
2390
2391                 lockh.cookie = it->it_lock_handle;
2392                 lock = ldlm_handle2lock(&lockh);
2393                 LASSERT(lock != NULL);
2394                 if (ldlm_has_layout(lock)) {
2395                         struct cl_object_conf conf;
2396
2397                         memset(&conf, 0, sizeof(conf));
2398                         conf.coc_opc = OBJECT_CONF_SET;
2399                         conf.coc_inode = *inode;
2400                         conf.coc_lock = lock;
2401                         conf.u.coc_layout = md.layout;
2402                         (void)ll_layout_conf(*inode, &conf);
2403                 }
2404                 LDLM_LOCK_PUT(lock);
2405         }
2406
2407         GOTO(out, rc = 0);
2408
2409 out:
2410         md_free_lustre_md(sbi->ll_md_exp, &md);
2411
2412 cleanup:
2413         if (rc != 0 && it != NULL && it->it_op & IT_OPEN)
2414                 ll_open_cleanup(sb != NULL ? sb : (*inode)->i_sb, req);
2415
2416         return rc;
2417 }
2418
2419 int ll_obd_statfs(struct inode *inode, void __user *arg)
2420 {
2421         struct ll_sb_info *sbi = NULL;
2422         struct obd_export *exp;
2423         char *buf = NULL;
2424         struct obd_ioctl_data *data = NULL;
2425         __u32 type;
2426         int len = 0, rc;
2427
2428         if (!inode || !(sbi = ll_i2sbi(inode)))
2429                 GOTO(out_statfs, rc = -EINVAL);
2430
2431         rc = obd_ioctl_getdata(&buf, &len, arg);
2432         if (rc)
2433                 GOTO(out_statfs, rc);
2434
2435         data = (void*)buf;
2436         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2437             !data->ioc_pbuf1 || !data->ioc_pbuf2)
2438                 GOTO(out_statfs, rc = -EINVAL);
2439
2440         if (data->ioc_inllen1 != sizeof(__u32) ||
2441             data->ioc_inllen2 != sizeof(__u32) ||
2442             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2443             data->ioc_plen2 != sizeof(struct obd_uuid))
2444                 GOTO(out_statfs, rc = -EINVAL);
2445
2446         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2447         if (type & LL_STATFS_LMV)
2448                 exp = sbi->ll_md_exp;
2449         else if (type & LL_STATFS_LOV)
2450                 exp = sbi->ll_dt_exp;
2451         else
2452                 GOTO(out_statfs, rc = -ENODEV);
2453
2454         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, NULL);
2455         if (rc)
2456                 GOTO(out_statfs, rc);
2457 out_statfs:
2458         OBD_FREE_LARGE(buf, len);
2459         return rc;
2460 }
2461
2462 /* this function prepares md_op_data hint for passing it down to MD stack. */
2463 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
2464                                       struct inode *i1, struct inode *i2,
2465                                       const char *name, size_t namelen,
2466                                       __u32 mode, __u32 opc, void *data)
2467 {
2468         LASSERT(i1 != NULL);
2469
2470         if (name == NULL) {
2471                 /* Do not reuse namelen for something else. */
2472                 if (namelen != 0)
2473                         return ERR_PTR(-EINVAL);
2474         } else {
2475                 if (namelen > ll_i2sbi(i1)->ll_namelen)
2476                         return ERR_PTR(-ENAMETOOLONG);
2477
2478                 if (!lu_name_is_valid_2(name, namelen))
2479                         return ERR_PTR(-EINVAL);
2480         }
2481
2482         if (op_data == NULL)
2483                 OBD_ALLOC_PTR(op_data);
2484
2485         if (op_data == NULL)
2486                 return ERR_PTR(-ENOMEM);
2487
2488         ll_i2gids(op_data->op_suppgids, i1, i2);
2489         op_data->op_fid1 = *ll_inode2fid(i1);
2490         op_data->op_default_stripe_offset = -1;
2491         if (S_ISDIR(i1->i_mode)) {
2492                 op_data->op_mea1 = ll_i2info(i1)->lli_lsm_md;
2493                 if (opc == LUSTRE_OPC_MKDIR)
2494                         op_data->op_default_stripe_offset =
2495                                    ll_i2info(i1)->lli_def_stripe_offset;
2496         }
2497
2498         if (i2) {
2499                 op_data->op_fid2 = *ll_inode2fid(i2);
2500                 if (S_ISDIR(i2->i_mode))
2501                         op_data->op_mea2 = ll_i2info(i2)->lli_lsm_md;
2502         } else {
2503                 fid_zero(&op_data->op_fid2);
2504         }
2505
2506         if (ll_i2sbi(i1)->ll_flags & LL_SBI_64BIT_HASH)
2507                 op_data->op_cli_flags |= CLI_HASH64;
2508
2509         if (ll_need_32bit_api(ll_i2sbi(i1)))
2510                 op_data->op_cli_flags |= CLI_API32;
2511
2512         op_data->op_name = name;
2513         op_data->op_namelen = namelen;
2514         op_data->op_mode = mode;
2515         op_data->op_mod_time = ktime_get_real_seconds();
2516         op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2517         op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2518         op_data->op_cap = cfs_curproc_cap_pack();
2519         op_data->op_mds = 0;
2520         if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2521              filename_is_volatile(name, namelen, &op_data->op_mds)) {
2522                 op_data->op_bias |= MDS_CREATE_VOLATILE;
2523         }
2524         op_data->op_data = data;
2525
2526         return op_data;
2527 }
2528
2529 void ll_finish_md_op_data(struct md_op_data *op_data)
2530 {
2531         security_release_secctx(op_data->op_file_secctx,
2532                                 op_data->op_file_secctx_size);
2533         OBD_FREE_PTR(op_data);
2534 }
2535
2536 #ifdef HAVE_SUPEROPS_USE_DENTRY
2537 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2538 #else
2539 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
2540 #endif
2541 {
2542         struct ll_sb_info *sbi;
2543
2544 #ifdef HAVE_SUPEROPS_USE_DENTRY
2545         LASSERT((seq != NULL) && (dentry != NULL));
2546         sbi = ll_s2sbi(dentry->d_sb);
2547 #else
2548         LASSERT((seq != NULL) && (vfs != NULL));
2549         sbi = ll_s2sbi(vfs->mnt_sb);
2550 #endif
2551
2552         if (sbi->ll_flags & LL_SBI_NOLCK)
2553                 seq_puts(seq, ",nolock");
2554
2555         if (sbi->ll_flags & LL_SBI_FLOCK)
2556                 seq_puts(seq, ",flock");
2557
2558         if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2559                 seq_puts(seq, ",localflock");
2560
2561         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2562                 seq_puts(seq, ",user_xattr");
2563
2564         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2565                 seq_puts(seq, ",lazystatfs");
2566
2567         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2568                 seq_puts(seq, ",user_fid2path");
2569
2570         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
2571                 seq_puts(seq, ",always_ping");
2572
2573         RETURN(0);
2574 }
2575
2576 /**
2577  * Get obd name by cmd, and copy out to user space
2578  */
2579 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2580 {
2581         struct ll_sb_info *sbi = ll_i2sbi(inode);
2582         struct obd_device *obd;
2583         ENTRY;
2584
2585         if (cmd == OBD_IOC_GETDTNAME)
2586                 obd = class_exp2obd(sbi->ll_dt_exp);
2587         else if (cmd == OBD_IOC_GETMDNAME)
2588                 obd = class_exp2obd(sbi->ll_md_exp);
2589         else
2590                 RETURN(-EINVAL);
2591
2592         if (!obd)
2593                 RETURN(-ENOENT);
2594
2595         if (copy_to_user((void __user *)arg, obd->obd_name,
2596                          strlen(obd->obd_name) + 1))
2597                 RETURN(-EFAULT);
2598
2599         RETURN(0);
2600 }
2601
2602 /**
2603  * Get lustre file system name by \a sbi. If \a buf is provided(non-NULL), the
2604  * fsname will be returned in this buffer; otherwise, a static buffer will be
2605  * used to store the fsname and returned to caller.
2606  */
2607 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
2608 {
2609         static char fsname_static[MTI_NAME_MAXLEN];
2610         struct lustre_sb_info *lsi = s2lsi(sb);
2611         char *ptr;
2612         int len;
2613
2614         if (buf == NULL) {
2615                 /* this means the caller wants to use static buffer
2616                  * and it doesn't care about race. Usually this is
2617                  * in error reporting path */
2618                 buf = fsname_static;
2619                 buflen = sizeof(fsname_static);
2620         }
2621
2622         len = strlen(lsi->lsi_lmd->lmd_profile);
2623         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
2624         if (ptr && (strcmp(ptr, "-client") == 0))
2625                 len -= 7;
2626
2627         if (unlikely(len >= buflen))
2628                 len = buflen - 1;
2629         strncpy(buf, lsi->lsi_lmd->lmd_profile, len);
2630         buf[len] = '\0';
2631
2632         return buf;
2633 }
2634
2635 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
2636 {
2637         char *path = NULL;
2638
2639         struct path p;
2640
2641         p.dentry = dentry;
2642         p.mnt = current->fs->root.mnt;
2643         path_get(&p);
2644         path = d_path(&p, buf, bufsize);
2645         path_put(&p);
2646         return path;
2647 }
2648
2649 void ll_dirty_page_discard_warn(struct page *page, int ioret)
2650 {
2651         char *buf, *path = NULL;
2652         struct dentry *dentry = NULL;
2653         struct inode *inode = page->mapping->host;
2654
2655         /* this can be called inside spin lock so use GFP_ATOMIC. */
2656         buf = (char *)__get_free_page(GFP_ATOMIC);
2657         if (buf != NULL) {
2658                 dentry = d_find_alias(page->mapping->host);
2659                 if (dentry != NULL)
2660                         path = ll_d_path(dentry, buf, PAGE_SIZE);
2661         }
2662
2663         CDEBUG(D_WARNING,
2664                "%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
2665                "(rc %d)\n", ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
2666                s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2667                PFID(ll_inode2fid(inode)),
2668                (path && !IS_ERR(path)) ? path : "", ioret);
2669
2670         if (dentry != NULL)
2671                 dput(dentry);
2672
2673         if (buf != NULL)
2674                 free_page((unsigned long)buf);
2675 }
2676
2677 ssize_t ll_copy_user_md(const struct lov_user_md __user *md,
2678                         struct lov_user_md **kbuf)
2679 {
2680         struct lov_user_md      lum;
2681         ssize_t                 lum_size;
2682         ENTRY;
2683
2684         if (copy_from_user(&lum, md, sizeof(lum)))
2685                 RETURN(-EFAULT);
2686
2687         lum_size = ll_lov_user_md_size(&lum);
2688         if (lum_size < 0)
2689                 RETURN(lum_size);
2690
2691         OBD_ALLOC(*kbuf, lum_size);
2692         if (*kbuf == NULL)
2693                 RETURN(-ENOMEM);
2694
2695         if (copy_from_user(*kbuf, md, lum_size) != 0) {
2696                 OBD_FREE(*kbuf, lum_size);
2697                 RETURN(-EFAULT);
2698         }
2699
2700         RETURN(lum_size);
2701 }
2702
2703 /*
2704  * Compute llite root squash state after a change of root squash
2705  * configuration setting or add/remove of a lnet nid
2706  */
2707 void ll_compute_rootsquash_state(struct ll_sb_info *sbi)
2708 {
2709         struct root_squash_info *squash = &sbi->ll_squash;
2710         int i;
2711         bool matched;
2712         struct lnet_process_id id;
2713
2714         /* Update norootsquash flag */
2715         down_write(&squash->rsi_sem);
2716         if (list_empty(&squash->rsi_nosquash_nids))
2717                 sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2718         else {
2719                 /* Do not apply root squash as soon as one of our NIDs is
2720                  * in the nosquash_nids list */
2721                 matched = false;
2722                 i = 0;
2723                 while (LNetGetId(i++, &id) != -ENOENT) {
2724                         if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
2725                                 continue;
2726                         if (cfs_match_nid(id.nid, &squash->rsi_nosquash_nids)) {
2727                                 matched = true;
2728                                 break;
2729                         }
2730                 }
2731                 if (matched)
2732                         sbi->ll_flags |= LL_SBI_NOROOTSQUASH;
2733                 else
2734                         sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2735         }
2736         up_write(&squash->rsi_sem);
2737 }
2738
2739 /**
2740  * Parse linkea content to extract information about a given hardlink
2741  *
2742  * \param[in]   ldata      - Initialized linkea data
2743  * \param[in]   linkno     - Link identifier
2744  * \param[out]  parent_fid - The entry's parent FID
2745  * \param[out]  ln         - Entry name destination buffer
2746  *
2747  * \retval 0 on success
2748  * \retval Appropriate negative error code on failure
2749  */
2750 static int ll_linkea_decode(struct linkea_data *ldata, unsigned int linkno,
2751                             struct lu_fid *parent_fid, struct lu_name *ln)
2752 {
2753         unsigned int    idx;
2754         int             rc;
2755         ENTRY;
2756
2757         rc = linkea_init_with_rec(ldata);
2758         if (rc < 0)
2759                 RETURN(rc);
2760
2761         if (linkno >= ldata->ld_leh->leh_reccount)
2762                 /* beyond last link */
2763                 RETURN(-ENODATA);
2764
2765         linkea_first_entry(ldata);
2766         for (idx = 0; ldata->ld_lee != NULL; idx++) {
2767                 linkea_entry_unpack(ldata->ld_lee, &ldata->ld_reclen, ln,
2768                                     parent_fid);
2769                 if (idx == linkno)
2770                         break;
2771
2772                 linkea_next_entry(ldata);
2773         }
2774
2775         if (idx < linkno)
2776                 RETURN(-ENODATA);
2777
2778         RETURN(0);
2779 }
2780
2781 /**
2782  * Get parent FID and name of an identified link. Operation is performed for
2783  * a given link number, letting the caller iterate over linkno to list one or
2784  * all links of an entry.
2785  *
2786  * \param[in]     file - File descriptor against which to perform the operation
2787  * \param[in,out] arg  - User-filled structure containing the linkno to operate
2788  *                       on and the available size. It is eventually filled with
2789  *                       the requested information or left untouched on error
2790  *
2791  * \retval - 0 on success
2792  * \retval - Appropriate negative error code on failure
2793  */
2794 int ll_getparent(struct file *file, struct getparent __user *arg)
2795 {
2796         struct inode            *inode = file_inode(file);
2797         struct linkea_data      *ldata;
2798         struct lu_buf            buf = LU_BUF_NULL;
2799         struct lu_name           ln;
2800         struct lu_fid            parent_fid;
2801         __u32                    linkno;
2802         __u32                    name_size;
2803         int                      rc;
2804
2805         ENTRY;
2806
2807         if (!cfs_capable(CFS_CAP_DAC_READ_SEARCH) &&
2808             !(ll_i2sbi(inode)->ll_flags & LL_SBI_USER_FID2PATH))
2809                 RETURN(-EPERM);
2810
2811         if (get_user(name_size, &arg->gp_name_size))
2812                 RETURN(-EFAULT);
2813
2814         if (get_user(linkno, &arg->gp_linkno))
2815                 RETURN(-EFAULT);
2816
2817         if (name_size > PATH_MAX)
2818                 RETURN(-EINVAL);
2819
2820         OBD_ALLOC(ldata, sizeof(*ldata));
2821         if (ldata == NULL)
2822                 RETURN(-ENOMEM);
2823
2824         rc = linkea_data_new(ldata, &buf);
2825         if (rc < 0)
2826                 GOTO(ldata_free, rc);
2827
2828 #ifdef HAVE_XATTR_HANDLER_FLAGS
2829         rc = ll_xattr_list(inode, XATTR_NAME_LINK, XATTR_TRUSTED_T, buf.lb_buf,
2830                            buf.lb_len, OBD_MD_FLXATTR);
2831 #else
2832         rc = ll_getxattr(file_dentry(file), XATTR_NAME_LINK, buf.lb_buf,
2833                          buf.lb_len);
2834 #endif /* HAVE_XATTR_HANDLER_FLAGS */
2835         if (rc < 0)
2836                 GOTO(lb_free, rc);
2837
2838         rc = ll_linkea_decode(ldata, linkno, &parent_fid, &ln);
2839         if (rc < 0)
2840                 GOTO(lb_free, rc);
2841
2842         if (ln.ln_namelen >= name_size)
2843                 GOTO(lb_free, rc = -EOVERFLOW);
2844
2845         if (copy_to_user(&arg->gp_fid, &parent_fid, sizeof(arg->gp_fid)))
2846                 GOTO(lb_free, rc = -EFAULT);
2847
2848         if (copy_to_user(&arg->gp_name, ln.ln_name, ln.ln_namelen))
2849                 GOTO(lb_free, rc = -EFAULT);
2850
2851         if (put_user('\0', arg->gp_name + ln.ln_namelen))
2852                 GOTO(lb_free, rc = -EFAULT);
2853
2854 lb_free:
2855         lu_buf_free(&buf);
2856 ldata_free:
2857         OBD_FREE(ldata, sizeof(*ldata));
2858
2859         RETURN(rc);
2860 }