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LU-1201 checksum: add libcfs crypto hash
[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.sun.com/software/products/lustre/docs/GPLv2.pdf
19  *
20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21  * CA 95054 USA or visit www.sun.com if you need additional information or
22  * have any questions.
23  *
24  * GPL HEADER END
25  */
26 /*
27  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
28  * Use is subject to license terms.
29  *
30  * Copyright (c) 2011, 2012, Whamcloud, Inc.
31  */
32 /*
33  * This file is part of Lustre, http://www.lustre.org/
34  * Lustre is a trademark of Sun Microsystems, Inc.
35  *
36  * lustre/llite/llite_lib.c
37  *
38  * Lustre Light Super operations
39  */
40
41 #define DEBUG_SUBSYSTEM S_LLITE
42
43 #include <linux/module.h>
44 #include <linux/types.h>
45 #include <linux/version.h>
46 #include <linux/mm.h>
47
48 #include <lustre_lite.h>
49 #include <lustre_ha.h>
50 #include <lustre_dlm.h>
51 #include <lprocfs_status.h>
52 #include <lustre_disk.h>
53 #include <lustre_param.h>
54 #include <lustre_log.h>
55 #include <cl_object.h>
56 #include <obd_cksum.h>
57 #include "llite_internal.h"
58
59 cfs_mem_cache_t *ll_file_data_slab;
60
61 CFS_LIST_HEAD(ll_super_blocks);
62 cfs_spinlock_t ll_sb_lock = CFS_SPIN_LOCK_UNLOCKED;
63
64 #ifndef MS_HAS_NEW_AOPS
65 extern struct address_space_operations ll_aops;
66 extern struct address_space_operations ll_dir_aops;
67 #else
68 extern struct address_space_operations_ext ll_aops;
69 extern struct address_space_operations_ext ll_dir_aops;
70 #endif
71
72 #ifndef log2
73 #define log2(n) cfs_ffz(~(n))
74 #endif
75
76 static struct ll_sb_info *ll_init_sbi(void)
77 {
78         struct ll_sb_info *sbi = NULL;
79         unsigned long pages;
80         struct sysinfo si;
81         class_uuid_t uuid;
82         int i;
83         ENTRY;
84
85         OBD_ALLOC(sbi, sizeof(*sbi));
86         if (!sbi)
87                 RETURN(NULL);
88
89         cfs_spin_lock_init(&sbi->ll_lock);
90         cfs_mutex_init(&sbi->ll_lco.lco_lock);
91         cfs_spin_lock_init(&sbi->ll_pp_extent_lock);
92         cfs_spin_lock_init(&sbi->ll_process_lock);
93         sbi->ll_rw_stats_on = 0;
94
95         si_meminfo(&si);
96         pages = si.totalram - si.totalhigh;
97         if (pages >> (20 - CFS_PAGE_SHIFT) < 512) {
98 #ifdef HAVE_BGL_SUPPORT
99                 sbi->ll_async_page_max = pages / 4;
100 #else
101                 sbi->ll_async_page_max = pages / 2;
102 #endif
103         } else {
104                 sbi->ll_async_page_max = (pages / 4) * 3;
105         }
106
107         sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
108                                            SBI_DEFAULT_READAHEAD_MAX);
109         sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
110         sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
111                                            SBI_DEFAULT_READAHEAD_WHOLE_MAX;
112         CFS_INIT_LIST_HEAD(&sbi->ll_conn_chain);
113         CFS_INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list);
114
115         ll_generate_random_uuid(uuid);
116         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
117         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
118
119         cfs_spin_lock(&ll_sb_lock);
120         cfs_list_add_tail(&sbi->ll_list, &ll_super_blocks);
121         cfs_spin_unlock(&ll_sb_lock);
122
123         sbi->ll_flags |= LL_SBI_VERBOSE;
124 #ifdef ENABLE_CHECKSUM
125         sbi->ll_flags |= LL_SBI_CHECKSUM;
126 #endif
127
128 #ifdef HAVE_LRU_RESIZE_SUPPORT
129         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
130 #endif
131
132         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
133                 cfs_spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i]. \
134                                    pp_r_hist.oh_lock);
135                 cfs_spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i]. \
136                                    pp_w_hist.oh_lock);
137         }
138
139         /* metadata statahead is enabled by default */
140         sbi->ll_sa_max = LL_SA_RPC_DEF;
141         cfs_atomic_set(&sbi->ll_sa_total, 0);
142         cfs_atomic_set(&sbi->ll_sa_wrong, 0);
143         cfs_atomic_set(&sbi->ll_agl_total, 0);
144         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
145
146         RETURN(sbi);
147 }
148
149 void ll_free_sbi(struct super_block *sb)
150 {
151         struct ll_sb_info *sbi = ll_s2sbi(sb);
152         ENTRY;
153
154         if (sbi != NULL) {
155                 cfs_spin_lock(&ll_sb_lock);
156                 cfs_list_del(&sbi->ll_list);
157                 cfs_spin_unlock(&ll_sb_lock);
158                 OBD_FREE(sbi, sizeof(*sbi));
159         }
160         EXIT;
161 }
162
163 static struct dentry_operations ll_d_root_ops = {
164         .d_compare = ll_dcompare,
165         .d_revalidate = ll_revalidate_nd,
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 = 0;
172         struct ll_sb_info *sbi = ll_s2sbi(sb);
173         struct obd_device *obd;
174         struct obd_capa *oc = NULL;
175         struct obd_statfs *osfs = NULL;
176         struct ptlrpc_request *request = NULL;
177         struct obd_connect_data *data = NULL;
178         struct obd_uuid *uuid;
179         struct md_op_data *op_data;
180         struct lustre_md lmd;
181         obd_valid valid;
182         int size, err, checksum;
183         ENTRY;
184
185         obd = class_name2obd(md);
186         if (!obd) {
187                 CERROR("MD %s: not setup or attached\n", md);
188                 RETURN(-EINVAL);
189         }
190
191         OBD_ALLOC_PTR(data);
192         if (data == NULL)
193                 RETURN(-ENOMEM);
194
195         OBD_ALLOC_PTR(osfs);
196         if (osfs == NULL) {
197                 OBD_FREE_PTR(data);
198                 RETURN(-ENOMEM);
199         }
200
201         if (proc_lustre_fs_root) {
202                 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
203                                                   dt, md);
204                 if (err < 0)
205                         CERROR("could not register mount in /proc/fs/lustre\n");
206         }
207
208         /* indicate the features supported by this client */
209         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
210                                   OBD_CONNECT_ATTRFID  |
211                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
212                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
213                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
214                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
215                                   OBD_CONNECT_RMT_CLIENT | OBD_CONNECT_VBR    |
216                                   OBD_CONNECT_FULL20   | OBD_CONNECT_64BITHASH|
217                                   OBD_CONNECT_EINPROGRESS |
218                                   OBD_CONNECT_JOBSTATS;
219
220         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
221                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
222
223 #ifdef HAVE_LRU_RESIZE_SUPPORT
224         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
225                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
226 #endif
227 #ifdef CONFIG_FS_POSIX_ACL
228         data->ocd_connect_flags |= OBD_CONNECT_ACL;
229 #endif
230         data->ocd_ibits_known = MDS_INODELOCK_FULL;
231         data->ocd_version = LUSTRE_VERSION_CODE;
232
233         if (sb->s_flags & MS_RDONLY)
234                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
235         if (sbi->ll_flags & LL_SBI_USER_XATTR)
236                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
237
238 #ifdef HAVE_MS_FLOCK_LOCK
239         /* force vfs to use lustre handler for flock() calls - bug 10743 */
240         sb->s_flags |= MS_FLOCK_LOCK;
241 #endif
242 #ifdef MS_HAS_NEW_AOPS
243         sb->s_flags |= MS_HAS_NEW_AOPS;
244 #endif
245
246         if (sbi->ll_flags & LL_SBI_FLOCK)
247                 sbi->ll_fop = &ll_file_operations_flock;
248         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
249                 sbi->ll_fop = &ll_file_operations;
250         else
251                 sbi->ll_fop = &ll_file_operations_noflock;
252
253         /* real client */
254         data->ocd_connect_flags |= OBD_CONNECT_REAL;
255         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
256                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
257
258         data->ocd_brw_size = PTLRPC_MAX_BRW_SIZE;
259
260         err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid, data, NULL);
261         if (err == -EBUSY) {
262                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
263                                    "recovery, of which this client is not a "
264                                    "part. Please wait for recovery to complete,"
265                                    " abort, or time out.\n", md);
266                 GOTO(out, err);
267         } else if (err) {
268                 CERROR("cannot connect to %s: rc = %d\n", md, err);
269                 GOTO(out, err);
270         }
271
272         err = obd_fid_init(sbi->ll_md_exp);
273         if (err) {
274                 CERROR("Can't init metadata layer FID infrastructure, "
275                        "rc %d\n", err);
276                 GOTO(out_md, err);
277         }
278
279         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
280                          cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS), 0);
281         if (err)
282                 GOTO(out_md_fid, err);
283
284         /* This needs to be after statfs to ensure connect has finished.
285          * Note that "data" does NOT contain the valid connect reply.
286          * If connecting to a 1.8 server there will be no LMV device, so
287          * we can access the MDC export directly and exp_connect_flags will
288          * be non-zero, but if accessing an upgraded 2.1 server it will
289          * have the correct flags filled in.
290          * XXX: fill in the LMV exp_connect_flags from MDC(s). */
291         valid = sbi->ll_md_exp->exp_connect_flags & CLIENT_CONNECT_MDT_REQD;
292         if (sbi->ll_md_exp->exp_connect_flags != 0 &&
293             valid != CLIENT_CONNECT_MDT_REQD) {
294                 char *buf;
295
296                 OBD_ALLOC_WAIT(buf, CFS_PAGE_SIZE);
297                 obd_connect_flags2str(buf, CFS_PAGE_SIZE,
298                                       valid ^ CLIENT_CONNECT_MDT_REQD, ",");
299                 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
300                                    "feature(s) needed for correct operation "
301                                    "of this client (%s). Please upgrade "
302                                    "server or downgrade client.\n",
303                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
304                 OBD_FREE(buf, CFS_PAGE_SIZE);
305                 GOTO(out_md, err = -EPROTO);
306         }
307
308         size = sizeof(*data);
309         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
310                            KEY_CONN_DATA,  &size, data, NULL);
311         if (err) {
312                 CERROR("Get connect data failed: %d \n", err);
313                 GOTO(out_md, err);
314         }
315
316         LASSERT(osfs->os_bsize);
317         sb->s_blocksize = osfs->os_bsize;
318         sb->s_blocksize_bits = log2(osfs->os_bsize);
319         sb->s_magic = LL_SUPER_MAGIC;
320         sb->s_maxbytes = MAX_LFS_FILESIZE;
321         sbi->ll_namelen = osfs->os_namelen;
322         sbi->ll_max_rw_chunk = LL_DEFAULT_MAX_RW_CHUNK;
323
324         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
325             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
326                 LCONSOLE_INFO("Disabling user_xattr feature because "
327                               "it is not supported on the server\n");
328                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
329         }
330
331         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
332 #ifdef MS_POSIXACL
333                 sb->s_flags |= MS_POSIXACL;
334 #endif
335                 sbi->ll_flags |= LL_SBI_ACL;
336         } else {
337                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
338 #ifdef MS_POSIXACL
339                 sb->s_flags &= ~MS_POSIXACL;
340 #endif
341                 sbi->ll_flags &= ~LL_SBI_ACL;
342         }
343
344         if (data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) {
345                 if (!(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
346                         sbi->ll_flags |= LL_SBI_RMT_CLIENT;
347                         LCONSOLE_INFO("client is set as remote by default.\n");
348                 }
349         } else {
350                 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
351                         sbi->ll_flags &= ~LL_SBI_RMT_CLIENT;
352                         LCONSOLE_INFO("client claims to be remote, but server "
353                                       "rejected, forced to be local.\n");
354                 }
355         }
356
357         if (data->ocd_connect_flags & OBD_CONNECT_MDS_CAPA) {
358                 LCONSOLE_INFO("client enabled MDS capability!\n");
359                 sbi->ll_flags |= LL_SBI_MDS_CAPA;
360         }
361
362         if (data->ocd_connect_flags & OBD_CONNECT_OSS_CAPA) {
363                 LCONSOLE_INFO("client enabled OSS capability!\n");
364                 sbi->ll_flags |= LL_SBI_OSS_CAPA;
365         }
366
367         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
368                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
369
370         if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE)
371                 sbi->ll_md_brw_size = data->ocd_brw_size;
372         else
373                 sbi->ll_md_brw_size = CFS_PAGE_SIZE;
374
375         obd = class_name2obd(dt);
376         if (!obd) {
377                 CERROR("DT %s: not setup or attached\n", dt);
378                 GOTO(out_md_fid, err = -ENODEV);
379         }
380
381         data->ocd_connect_flags = OBD_CONNECT_GRANT     | OBD_CONNECT_VERSION  |
382                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
383                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID      |
384                                   OBD_CONNECT_SRVLOCK   | OBD_CONNECT_TRUNCLOCK|
385                                   OBD_CONNECT_AT | OBD_CONNECT_RMT_CLIENT |
386                                   OBD_CONNECT_OSS_CAPA | OBD_CONNECT_VBR|
387                                   OBD_CONNECT_FULL20 | OBD_CONNECT_64BITHASH |
388                                   OBD_CONNECT_MAXBYTES |
389                                   OBD_CONNECT_EINPROGRESS |
390                                   OBD_CONNECT_JOBSTATS;
391
392         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
393                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
394
395         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_CKSUM)) {
396                 /* OBD_CONNECT_CKSUM should always be set, even if checksums are
397                  * disabled by default, because it can still be enabled on the
398                  * fly via /proc. As a consequence, we still need to come to an
399                  * agreement on the supported algorithms at connect time */
400                 data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
401
402                 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
403                         data->ocd_cksum_types = OBD_CKSUM_ADLER;
404                 else
405                         data->ocd_cksum_types = cksum_types_supported_client();
406         }
407
408 #ifdef HAVE_LRU_RESIZE_SUPPORT
409         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
410 #endif
411         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
412                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
413
414         CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d "
415                "ocd_grant: %d\n", data->ocd_connect_flags,
416                data->ocd_version, data->ocd_grant);
417
418         obd->obd_upcall.onu_owner = &sbi->ll_lco;
419         obd->obd_upcall.onu_upcall = cl_ocd_update;
420
421         data->ocd_brw_size = PTLRPC_MAX_BRW_SIZE;
422
423         err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data, NULL);
424         if (err == -EBUSY) {
425                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
426                                    "recovery, of which this client is not a "
427                                    "part.  Please wait for recovery to "
428                                    "complete, abort, or time out.\n", dt);
429                 GOTO(out_md_fid, err);
430         } else if (err) {
431                 CERROR("Cannot connect to %s: rc = %d\n", dt, err);
432                 GOTO(out_md_fid, err);
433         }
434
435         err = obd_fid_init(sbi->ll_dt_exp);
436         if (err) {
437                 CERROR("Can't init data layer FID infrastructure, "
438                        "rc %d\n", err);
439                 GOTO(out_dt, err);
440         }
441
442         cfs_mutex_lock(&sbi->ll_lco.lco_lock);
443         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
444         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
445         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
446         cfs_mutex_unlock(&sbi->ll_lco.lco_lock);
447
448         fid_zero(&sbi->ll_root_fid);
449         err = md_getstatus(sbi->ll_md_exp, &sbi->ll_root_fid, &oc);
450         if (err) {
451                 CERROR("cannot mds_connect: rc = %d\n", err);
452                 GOTO(out_lock_cn_cb, err);
453         }
454         if (!fid_is_sane(&sbi->ll_root_fid)) {
455                 CERROR("Invalid root fid during mount\n");
456                 GOTO(out_lock_cn_cb, err = -EINVAL);
457         }
458         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
459
460         sb->s_op = &lustre_super_operations;
461 #if THREAD_SIZE >= 8192
462         sb->s_export_op = &lustre_export_operations;
463 #endif
464
465         /* make root inode
466          * XXX: move this to after cbd setup? */
467         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMDSCAPA;
468         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
469                 valid |= OBD_MD_FLRMTPERM;
470         else if (sbi->ll_flags & LL_SBI_ACL)
471                 valid |= OBD_MD_FLACL;
472
473         OBD_ALLOC_PTR(op_data);
474         if (op_data == NULL)
475                 GOTO(out_lock_cn_cb, err = -ENOMEM);
476
477         op_data->op_fid1 = sbi->ll_root_fid;
478         op_data->op_mode = 0;
479         op_data->op_capa1 = oc;
480         op_data->op_valid = valid;
481
482         err = md_getattr(sbi->ll_md_exp, op_data, &request);
483         if (oc)
484                 capa_put(oc);
485         OBD_FREE_PTR(op_data);
486         if (err) {
487                 CERROR("md_getattr failed for root: rc = %d\n", err);
488                 GOTO(out_lock_cn_cb, err);
489         }
490         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
491                                sbi->ll_md_exp, &lmd);
492         if (err) {
493                 CERROR("failed to understand root inode md: rc = %d\n", err);
494                 ptlrpc_req_finished (request);
495                 GOTO(out_lock_cn_cb, err);
496         }
497
498         LASSERT(fid_is_sane(&sbi->ll_root_fid));
499         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid, 0), &lmd);
500         md_free_lustre_md(sbi->ll_md_exp, &lmd);
501         ptlrpc_req_finished(request);
502
503         if (root == NULL || IS_ERR(root)) {
504                 if (lmd.lsm)
505                         obd_free_memmd(sbi->ll_dt_exp, &lmd.lsm);
506 #ifdef CONFIG_FS_POSIX_ACL
507                 if (lmd.posix_acl) {
508                         posix_acl_release(lmd.posix_acl);
509                         lmd.posix_acl = NULL;
510                 }
511 #endif
512                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
513                 root = NULL;
514                 CERROR("lustre_lite: bad iget4 for root\n");
515                 GOTO(out_root, err);
516         }
517
518         err = ll_close_thread_start(&sbi->ll_lcq);
519         if (err) {
520                 CERROR("cannot start close thread: rc %d\n", err);
521                 GOTO(out_root, err);
522         }
523
524 #ifdef CONFIG_FS_POSIX_ACL
525         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
526                 rct_init(&sbi->ll_rct);
527                 et_init(&sbi->ll_et);
528         }
529 #endif
530
531         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
532         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
533                                  KEY_CHECKSUM, sizeof(checksum), &checksum,
534                                  NULL);
535         cl_sb_init(sb);
536
537         sb->s_root = d_alloc_root(root);
538         sb->s_root->d_op = &ll_d_root_ops;
539
540         sbi->ll_sdev_orig = sb->s_dev;
541
542         /* We set sb->s_dev equal on all lustre clients in order to support
543          * NFS export clustering.  NFSD requires that the FSID be the same
544          * on all clients. */
545         /* s_dev is also used in lt_compare() to compare two fs, but that is
546          * only a node-local comparison. */
547         uuid = obd_get_uuid(sbi->ll_md_exp);
548         if (uuid != NULL)
549                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
550         sbi->ll_mnt = mnt;
551
552         if (data != NULL)
553                 OBD_FREE_PTR(data);
554         if (osfs != NULL)
555                 OBD_FREE_PTR(osfs);
556
557         RETURN(err);
558 out_root:
559         if (root)
560                 iput(root);
561 out_lock_cn_cb:
562         obd_fid_fini(sbi->ll_dt_exp);
563 out_dt:
564         obd_disconnect(sbi->ll_dt_exp);
565         sbi->ll_dt_exp = NULL;
566 out_md_fid:
567         obd_fid_fini(sbi->ll_md_exp);
568 out_md:
569         obd_disconnect(sbi->ll_md_exp);
570         sbi->ll_md_exp = NULL;
571 out:
572         if (data != NULL)
573                 OBD_FREE_PTR(data);
574         if (osfs != NULL)
575                 OBD_FREE_PTR(osfs);
576         lprocfs_unregister_mountpoint(sbi);
577         return err;
578 }
579
580 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
581 {
582         int size, rc;
583
584         *lmmsize = obd_size_diskmd(sbi->ll_dt_exp, NULL);
585         size = sizeof(int);
586         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
587                           KEY_MAX_EASIZE, &size, lmmsize, NULL);
588         if (rc)
589                 CERROR("Get max mdsize error rc %d \n", rc);
590
591         RETURN(rc);
592 }
593
594 void ll_dump_inode(struct inode *inode)
595 {
596         struct list_head *tmp;
597         int dentry_count = 0;
598
599         LASSERT(inode != NULL);
600
601         list_for_each(tmp, &inode->i_dentry)
602                 dentry_count++;
603
604         CERROR("inode %p dump: dev=%s ino=%lu mode=%o count=%u, %d dentries\n",
605                inode, ll_i2mdexp(inode)->exp_obd->obd_name, inode->i_ino,
606                inode->i_mode, atomic_read(&inode->i_count), dentry_count);
607 }
608
609 void lustre_dump_dentry(struct dentry *dentry, int recur)
610 {
611         struct list_head *tmp;
612         int subdirs = 0;
613
614         LASSERT(dentry != NULL);
615
616         list_for_each(tmp, &dentry->d_subdirs)
617                 subdirs++;
618
619         CERROR("dentry %p dump: name=%.*s parent=%.*s (%p), inode=%p, count=%u,"
620                " flags=0x%x, fsdata=%p, %d subdirs\n", dentry,
621                dentry->d_name.len, dentry->d_name.name,
622                dentry->d_parent->d_name.len, dentry->d_parent->d_name.name,
623                dentry->d_parent, dentry->d_inode, atomic_read(&dentry->d_count),
624                dentry->d_flags, dentry->d_fsdata, subdirs);
625         if (dentry->d_inode != NULL)
626                 ll_dump_inode(dentry->d_inode);
627
628         if (recur == 0)
629                 return;
630
631        list_for_each(tmp, &dentry->d_subdirs) {
632                 struct dentry *d = list_entry(tmp, struct dentry, d_child);
633                 lustre_dump_dentry(d, recur - 1);
634         }
635 }
636
637 void client_common_put_super(struct super_block *sb)
638 {
639         struct ll_sb_info *sbi = ll_s2sbi(sb);
640         ENTRY;
641
642 #ifdef CONFIG_FS_POSIX_ACL
643         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
644                 et_fini(&sbi->ll_et);
645                 rct_fini(&sbi->ll_rct);
646         }
647 #endif
648
649         obd_cancel_unused(sbi->ll_dt_exp, NULL, 0, NULL);
650
651         ll_close_thread_shutdown(sbi->ll_lcq);
652
653         cl_sb_fini(sb);
654
655         cfs_list_del(&sbi->ll_conn_chain);
656
657         obd_fid_fini(sbi->ll_dt_exp);
658         obd_disconnect(sbi->ll_dt_exp);
659         sbi->ll_dt_exp = NULL;
660
661         lprocfs_unregister_mountpoint(sbi);
662
663         obd_fid_fini(sbi->ll_md_exp);
664         obd_disconnect(sbi->ll_md_exp);
665         sbi->ll_md_exp = NULL;
666
667         EXIT;
668 }
669
670 void ll_kill_super(struct super_block *sb)
671 {
672         struct ll_sb_info *sbi;
673
674         ENTRY;
675
676         /* not init sb ?*/
677         if (!(sb->s_flags & MS_ACTIVE))
678                 return;
679
680         sbi = ll_s2sbi(sb);
681         /* we need restore s_dev from changed for clustred NFS before put_super
682          * because new kernels have cached s_dev and change sb->s_dev in
683          * put_super not affected real removing devices */
684         if (sbi)
685                 sb->s_dev = sbi->ll_sdev_orig;
686         EXIT;
687 }
688
689 char *ll_read_opt(const char *opt, char *data)
690 {
691         char *value;
692         char *retval;
693         ENTRY;
694
695         CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
696         if (strncmp(opt, data, strlen(opt)))
697                 RETURN(NULL);
698         if ((value = strchr(data, '=')) == NULL)
699                 RETURN(NULL);
700
701         value++;
702         OBD_ALLOC(retval, strlen(value) + 1);
703         if (!retval) {
704                 CERROR("out of memory!\n");
705                 RETURN(NULL);
706         }
707
708         memcpy(retval, value, strlen(value)+1);
709         CDEBUG(D_SUPER, "Assigned option: %s, value %s\n", opt, retval);
710         RETURN(retval);
711 }
712
713 static inline int ll_set_opt(const char *opt, char *data, int fl)
714 {
715         if (strncmp(opt, data, strlen(opt)) != 0)
716                 return(0);
717         else
718                 return(fl);
719 }
720
721 /* non-client-specific mount options are parsed in lmd_parse */
722 static int ll_options(char *options, int *flags)
723 {
724         int tmp;
725         char *s1 = options, *s2;
726         ENTRY;
727
728         if (!options)
729                 RETURN(0);
730
731         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
732
733         while (*s1) {
734                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
735                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
736                 if (tmp) {
737                         *flags |= tmp;
738                         goto next;
739                 }
740                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
741                 if (tmp) {
742                         *flags |= tmp;
743                         goto next;
744                 }
745                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
746                 if (tmp) {
747                         *flags |= tmp;
748                         goto next;
749                 }
750                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
751                 if (tmp) {
752                         *flags &= ~tmp;
753                         goto next;
754                 }
755                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
756                 if (tmp) {
757                         *flags |= tmp;
758                         goto next;
759                 }
760                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
761                 if (tmp) {
762                         *flags &= ~tmp;
763                         goto next;
764                 }
765 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2,5,50,0)
766                 tmp = ll_set_opt("acl", s1, LL_SBI_ACL);
767                 if (tmp) {
768                         /* Ignore deprecated mount option.  The client will
769                          * always try to mount with ACL support, whether this
770                          * is used depends on whether server supports it. */
771                         LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
772                                                   "mount option 'acl'.\n");
773                         goto next;
774                 }
775                 tmp = ll_set_opt("noacl", s1, LL_SBI_ACL);
776                 if (tmp) {
777                         LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
778                                                   "mount option 'noacl'.\n");
779                         goto next;
780                 }
781 #else
782 #warning "{no}acl options have been deprecated since 1.8, please remove them"
783 #endif
784                 tmp = ll_set_opt("remote_client", s1, LL_SBI_RMT_CLIENT);
785                 if (tmp) {
786                         *flags |= tmp;
787                         goto next;
788                 }
789
790                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
791                 if (tmp) {
792                         *flags |= tmp;
793                         goto next;
794                 }
795                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
796                 if (tmp) {
797                         *flags &= ~tmp;
798                         goto next;
799                 }
800                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
801                 if (tmp) {
802                         *flags |= tmp;
803                         goto next;
804                 }
805                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
806                 if (tmp) {
807                         *flags &= ~tmp;
808                         goto next;
809                 }
810                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
811                 if (tmp) {
812                         *flags |= tmp;
813                         goto next;
814                 }
815                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
816                 if (tmp) {
817                         *flags &= ~tmp;
818                         goto next;
819                 }
820                 tmp = ll_set_opt("som_preview", s1, LL_SBI_SOM_PREVIEW);
821                 if (tmp) {
822                         *flags |= tmp;
823                         goto next;
824                 }
825                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
826                 if (tmp) {
827                         *flags |= tmp;
828                         goto next;
829                 }
830                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
831                 if (tmp) {
832                         *flags |= tmp;
833                         goto next;
834                 }
835                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
836                 if (tmp) {
837                         *flags &= ~tmp;
838                         goto next;
839                 }
840                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
841                                    s1);
842                 RETURN(-EINVAL);
843
844 next:
845                 /* Find next opt */
846                 s2 = strchr(s1, ',');
847                 if (s2 == NULL)
848                         break;
849                 s1 = s2 + 1;
850         }
851         RETURN(0);
852 }
853
854 void ll_lli_init(struct ll_inode_info *lli)
855 {
856         lli->lli_inode_magic = LLI_INODE_MAGIC;
857         lli->lli_flags = 0;
858         lli->lli_ioepoch = 0;
859         lli->lli_maxbytes = MAX_LFS_FILESIZE;
860         cfs_spin_lock_init(&lli->lli_lock);
861         lli->lli_posix_acl = NULL;
862         lli->lli_remote_perms = NULL;
863         cfs_mutex_init(&lli->lli_rmtperm_mutex);
864         /* Do not set lli_fid, it has been initialized already. */
865         fid_zero(&lli->lli_pfid);
866         CFS_INIT_LIST_HEAD(&lli->lli_close_list);
867         CFS_INIT_LIST_HEAD(&lli->lli_oss_capas);
868         cfs_atomic_set(&lli->lli_open_count, 0);
869         lli->lli_mds_capa = NULL;
870         lli->lli_rmtperm_time = 0;
871         lli->lli_pending_och = NULL;
872         lli->lli_mds_read_och = NULL;
873         lli->lli_mds_write_och = NULL;
874         lli->lli_mds_exec_och = NULL;
875         lli->lli_open_fd_read_count = 0;
876         lli->lli_open_fd_write_count = 0;
877         lli->lli_open_fd_exec_count = 0;
878         cfs_mutex_init(&lli->lli_och_mutex);
879         cfs_spin_lock_init(&lli->lli_agl_lock);
880         lli->lli_smd = NULL;
881         lli->lli_clob = NULL;
882
883         LASSERT(lli->lli_vfs_inode.i_mode != 0);
884         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
885                 cfs_mutex_init(&lli->lli_readdir_mutex);
886                 lli->lli_opendir_key = NULL;
887                 lli->lli_sai = NULL;
888                 lli->lli_sa_pos = 0;
889                 lli->lli_def_acl = NULL;
890                 cfs_spin_lock_init(&lli->lli_sa_lock);
891                 lli->lli_opendir_pid = 0;
892         } else {
893                 cfs_sema_init(&lli->lli_size_sem, 1);
894                 lli->lli_size_sem_owner = NULL;
895                 lli->lli_symlink_name = NULL;
896                 cfs_init_rwsem(&lli->lli_trunc_sem);
897                 cfs_mutex_init(&lli->lli_write_mutex);
898                 lli->lli_async_rc = 0;
899                 lli->lli_write_rc = 0;
900                 cfs_init_rwsem(&lli->lli_glimpse_sem);
901                 lli->lli_glimpse_time = 0;
902                 CFS_INIT_LIST_HEAD(&lli->lli_agl_list);
903                 lli->lli_agl_index = 0;
904         }
905 }
906
907 static inline int ll_bdi_register(struct backing_dev_info *bdi)
908 {
909 #ifdef HAVE_BDI_REGISTER
910         static atomic_t ll_bdi_num = ATOMIC_INIT(0);
911
912 #ifdef HAVE_BDI_NAME
913         bdi->name = "lustre";
914 #endif
915         return bdi_register(bdi, NULL, "lustre-%d",
916                             atomic_inc_return(&ll_bdi_num));
917 #else
918         return 0;
919 #endif
920 }
921
922 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
923 {
924         struct lustre_profile *lprof = NULL;
925         struct lustre_sb_info *lsi = s2lsi(sb);
926         struct ll_sb_info *sbi;
927         char  *dt = NULL, *md = NULL;
928         char  *profilenm = get_profile_name(sb);
929         struct config_llog_instance *cfg;
930         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
931         const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
932         int    err;
933         ENTRY;
934
935         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
936
937         OBD_ALLOC_PTR(cfg);
938         if (cfg == NULL)
939                 RETURN(-ENOMEM);
940
941         cfs_module_get();
942
943         /* client additional sb info */
944         lsi->lsi_llsbi = sbi = ll_init_sbi();
945         if (!sbi) {
946                 cfs_module_put(THIS_MODULE);
947                 OBD_FREE_PTR(cfg);
948                 RETURN(-ENOMEM);
949         }
950
951         err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
952         if (err)
953                 GOTO(out_free, err);
954
955         err = ll_bdi_init(&lsi->lsi_bdi);
956         if (err)
957                 GOTO(out_free, err);
958         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
959         lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
960         err = ll_bdi_register(&lsi->lsi_bdi);
961         if (err)
962                 GOTO(out_free, err);
963
964 #ifdef HAVE_SB_BDI
965         sb->s_bdi = &lsi->lsi_bdi;
966 #endif
967
968         /* Generate a string unique to this super, in case some joker tries
969            to mount the same fs at two mount points.
970            Use the address of the super itself.*/
971         cfg->cfg_instance = sb;
972         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
973
974         /* set up client obds */
975         err = lustre_process_log(sb, profilenm, cfg);
976         if (err < 0) {
977                 CERROR("Unable to process log: %d\n", err);
978                 GOTO(out_free, err);
979         }
980
981         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
982         lprof = class_get_profile(profilenm);
983         if (lprof == NULL) {
984                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
985                                    " read from the MGS.  Does that filesystem "
986                                    "exist?\n", profilenm);
987                 GOTO(out_free, err = -EINVAL);
988         }
989         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
990                lprof->lp_md, lprof->lp_dt);
991
992         OBD_ALLOC(dt, strlen(lprof->lp_dt) + instlen + 2);
993         if (!dt)
994                 GOTO(out_free, err = -ENOMEM);
995         sprintf(dt, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
996
997         OBD_ALLOC(md, strlen(lprof->lp_md) + instlen + 2);
998         if (!md)
999                 GOTO(out_free, err = -ENOMEM);
1000         sprintf(md, "%s-%p", lprof->lp_md, cfg->cfg_instance);
1001
1002         /* connections, registrations, sb setup */
1003         err = client_common_fill_super(sb, md, dt, mnt);
1004
1005 out_free:
1006         if (md)
1007                 OBD_FREE(md, strlen(lprof->lp_md) + instlen + 2);
1008         if (dt)
1009                 OBD_FREE(dt, strlen(lprof->lp_dt) + instlen + 2);
1010         if (err)
1011                 ll_put_super(sb);
1012         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1013                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1014
1015         OBD_FREE_PTR(cfg);
1016         RETURN(err);
1017 } /* ll_fill_super */
1018
1019
1020 void lu_context_keys_dump(void);
1021
1022 void ll_put_super(struct super_block *sb)
1023 {
1024         struct config_llog_instance cfg;
1025         struct obd_device *obd;
1026         struct lustre_sb_info *lsi = s2lsi(sb);
1027         struct ll_sb_info *sbi = ll_s2sbi(sb);
1028         char *profilenm = get_profile_name(sb);
1029         int force = 1, next;
1030         ENTRY;
1031
1032         CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1033
1034         ll_print_capa_stat(sbi);
1035
1036         cfg.cfg_instance = sb;
1037         lustre_end_log(sb, profilenm, &cfg);
1038
1039         if (sbi->ll_md_exp) {
1040                 obd = class_exp2obd(sbi->ll_md_exp);
1041                 if (obd)
1042                         force = obd->obd_force;
1043         }
1044
1045         /* We need to set force before the lov_disconnect in
1046            lustre_common_put_super, since l_d cleans up osc's as well. */
1047         if (force) {
1048                 next = 0;
1049                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1050                                                      &next)) != NULL) {
1051                         obd->obd_force = force;
1052                 }
1053         }
1054
1055         if (sbi->ll_lcq) {
1056                 /* Only if client_common_fill_super succeeded */
1057                 client_common_put_super(sb);
1058         }
1059
1060         next = 0;
1061         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1062                 class_manual_cleanup(obd);
1063         }
1064
1065         if (sbi->ll_flags & LL_SBI_VERBOSE)
1066                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1067
1068         if (profilenm)
1069                 class_del_profile(profilenm);
1070
1071         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1072                 ll_bdi_destroy(&lsi->lsi_bdi);
1073                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1074         }
1075
1076         ll_free_sbi(sb);
1077         lsi->lsi_llsbi = NULL;
1078
1079         lustre_common_put_super(sb);
1080
1081         cl_env_cache_purge(~0);
1082
1083         cfs_module_put(THIS_MODULE);
1084
1085         EXIT;
1086 } /* client_put_super */
1087
1088 struct inode *ll_inode_from_lock(struct ldlm_lock *lock)
1089 {
1090         struct inode *inode = NULL;
1091         /* NOTE: we depend on atomic igrab() -bzzz */
1092         lock_res_and_lock(lock);
1093         if (lock->l_ast_data) {
1094                 struct ll_inode_info *lli = ll_i2info(lock->l_ast_data);
1095                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1096                         inode = igrab(lock->l_ast_data);
1097                 } else {
1098                         inode = lock->l_ast_data;
1099                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1100                                          D_WARNING, lock, "l_ast_data %p is "
1101                                          "bogus: magic %08x", lock->l_ast_data,
1102                                          lli->lli_inode_magic);
1103                         inode = NULL;
1104                 }
1105         }
1106         unlock_res_and_lock(lock);
1107         return inode;
1108 }
1109
1110 static int null_if_equal(struct ldlm_lock *lock, void *data)
1111 {
1112         if (data == lock->l_ast_data) {
1113                 lock->l_ast_data = NULL;
1114
1115                 if (lock->l_req_mode != lock->l_granted_mode)
1116                         LDLM_ERROR(lock,"clearing inode with ungranted lock");
1117         }
1118
1119         return LDLM_ITER_CONTINUE;
1120 }
1121
1122 void ll_clear_inode(struct inode *inode)
1123 {
1124         struct ll_inode_info *lli = ll_i2info(inode);
1125         struct ll_sb_info *sbi = ll_i2sbi(inode);
1126         ENTRY;
1127
1128         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
1129                inode->i_generation, inode);
1130
1131         if (S_ISDIR(inode->i_mode)) {
1132                 /* these should have been cleared in ll_file_release */
1133                 LASSERT(lli->lli_opendir_key == NULL);
1134                 LASSERT(lli->lli_sai == NULL);
1135                 LASSERT(lli->lli_opendir_pid == 0);
1136         }
1137
1138         ll_i2info(inode)->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
1139         md_change_cbdata(sbi->ll_md_exp, ll_inode2fid(inode),
1140                          null_if_equal, inode);
1141
1142         LASSERT(!lli->lli_open_fd_write_count);
1143         LASSERT(!lli->lli_open_fd_read_count);
1144         LASSERT(!lli->lli_open_fd_exec_count);
1145
1146         if (lli->lli_mds_write_och)
1147                 ll_md_real_close(inode, FMODE_WRITE);
1148         if (lli->lli_mds_exec_och)
1149                 ll_md_real_close(inode, FMODE_EXEC);
1150         if (lli->lli_mds_read_och)
1151                 ll_md_real_close(inode, FMODE_READ);
1152
1153         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1154                 OBD_FREE(lli->lli_symlink_name,
1155                          strlen(lli->lli_symlink_name) + 1);
1156                 lli->lli_symlink_name = NULL;
1157         }
1158
1159         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1160                 LASSERT(lli->lli_posix_acl == NULL);
1161                 if (lli->lli_remote_perms) {
1162                         free_rmtperm_hash(lli->lli_remote_perms);
1163                         lli->lli_remote_perms = NULL;
1164                 }
1165         }
1166 #ifdef CONFIG_FS_POSIX_ACL
1167         else if (lli->lli_posix_acl) {
1168                 LASSERT(cfs_atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1169                 LASSERT(lli->lli_remote_perms == NULL);
1170                 posix_acl_release(lli->lli_posix_acl);
1171                 lli->lli_posix_acl = NULL;
1172         }
1173 #endif
1174         lli->lli_inode_magic = LLI_INODE_DEAD;
1175
1176         ll_clear_inode_capas(inode);
1177         if (!S_ISDIR(inode->i_mode))
1178                 LASSERT(cfs_list_empty(&lli->lli_agl_list));
1179
1180         /*
1181          * XXX This has to be done before lsm is freed below, because
1182          * cl_object still uses inode lsm.
1183          */
1184         cl_inode_fini(inode);
1185
1186         if (lli->lli_smd) {
1187                 obd_free_memmd(sbi->ll_dt_exp, &lli->lli_smd);
1188                 lli->lli_smd = NULL;
1189         }
1190
1191
1192         EXIT;
1193 }
1194
1195 int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data,
1196                   struct md_open_data **mod)
1197 {
1198         struct lustre_md md;
1199         struct inode *inode = dentry->d_inode;
1200         struct ll_sb_info *sbi = ll_i2sbi(inode);
1201         struct ptlrpc_request *request = NULL;
1202         int rc, ia_valid;
1203         ENTRY;
1204
1205         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1206                                      LUSTRE_OPC_ANY, NULL);
1207         if (IS_ERR(op_data))
1208                 RETURN(PTR_ERR(op_data));
1209
1210         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, NULL, 0,
1211                         &request, mod);
1212         if (rc) {
1213                 ptlrpc_req_finished(request);
1214                 if (rc == -ENOENT) {
1215                         inode->i_nlink = 0;
1216                         /* Unlinked special device node? Or just a race?
1217                          * Pretend we done everything. */
1218                         if (!S_ISREG(inode->i_mode) &&
1219                             !S_ISDIR(inode->i_mode)) {
1220                                 ia_valid = op_data->op_attr.ia_valid;
1221                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1222                                 rc = simple_setattr(dentry, &op_data->op_attr);
1223                                 op_data->op_attr.ia_valid = ia_valid;
1224                         }
1225                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1226                         CERROR("md_setattr fails: rc = %d\n", rc);
1227                 }
1228                 RETURN(rc);
1229         }
1230
1231         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1232                               sbi->ll_md_exp, &md);
1233         if (rc) {
1234                 ptlrpc_req_finished(request);
1235                 RETURN(rc);
1236         }
1237
1238         /* We want to adjust timestamps.
1239          * If there is at least some data in file, we cleared ATTR_SIZE
1240          * to avoid update size, otherwise it is important to do.(SOM case)
1241          * (bug 6196) */
1242         ia_valid = op_data->op_attr.ia_valid;
1243         /* Since we set ATTR_*_SET flags above, and already done permission
1244          * check, So don't let inode_change_ok() check it again.  */
1245         op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1246         rc = simple_setattr(dentry, &op_data->op_attr);
1247         op_data->op_attr.ia_valid = ia_valid;
1248
1249         /* Extract epoch data if obtained. */
1250         op_data->op_handle = md.body->handle;
1251         op_data->op_ioepoch = md.body->ioepoch;
1252
1253         ll_update_inode(inode, &md);
1254         ptlrpc_req_finished(request);
1255
1256         RETURN(rc);
1257 }
1258
1259 /* Close IO epoch and send Size-on-MDS attribute update. */
1260 static int ll_setattr_done_writing(struct inode *inode,
1261                                    struct md_op_data *op_data,
1262                                    struct md_open_data *mod)
1263 {
1264         struct ll_inode_info *lli = ll_i2info(inode);
1265         int rc = 0;
1266         ENTRY;
1267
1268         LASSERT(op_data != NULL);
1269         if (!S_ISREG(inode->i_mode))
1270                 RETURN(0);
1271
1272         CDEBUG(D_INODE, "Epoch "LPU64" closed on "DFID" for truncate\n",
1273                op_data->op_ioepoch, PFID(&lli->lli_fid));
1274
1275         op_data->op_flags = MF_EPOCH_CLOSE;
1276         ll_done_writing_attr(inode, op_data);
1277         ll_pack_inode2opdata(inode, op_data, NULL);
1278
1279         rc = md_done_writing(ll_i2sbi(inode)->ll_md_exp, op_data, mod);
1280         if (rc == -EAGAIN) {
1281                 /* MDS has instructed us to obtain Size-on-MDS attribute
1282                  * from OSTs and send setattr to back to MDS. */
1283                 rc = ll_som_update(inode, op_data);
1284         } else if (rc) {
1285                 CERROR("inode %lu mdc truncate failed: rc = %d\n",
1286                        inode->i_ino, rc);
1287         }
1288         RETURN(rc);
1289 }
1290
1291 static int ll_setattr_ost(struct inode *inode, struct iattr *attr)
1292 {
1293         struct obd_capa *capa;
1294         int rc;
1295
1296         if (attr->ia_valid & ATTR_SIZE)
1297                 capa = ll_osscapa_get(inode, CAPA_OPC_OSS_TRUNC);
1298         else
1299                 capa = ll_mdscapa_get(inode);
1300
1301         rc = cl_setattr_ost(inode, attr, capa);
1302
1303         if (attr->ia_valid & ATTR_SIZE)
1304                 ll_truncate_free_capa(capa);
1305         else
1306                 capa_put(capa);
1307
1308         return rc;
1309 }
1310
1311 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1312  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1313  * keep these values until such a time that objects are allocated for it.
1314  * We do the MDS operations first, as it is checking permissions for us.
1315  * We don't to the MDS RPC if there is nothing that we want to store there,
1316  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1317  * going to do an RPC anyways.
1318  *
1319  * If we are doing a truncate, we will send the mtime and ctime updates
1320  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1321  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1322  * at the same time.
1323  */
1324 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr)
1325 {
1326         struct inode *inode = dentry->d_inode;
1327         struct ll_inode_info *lli = ll_i2info(inode);
1328         struct lov_stripe_md *lsm = lli->lli_smd;
1329         struct md_op_data *op_data = NULL;
1330         struct md_open_data *mod = NULL;
1331         int ia_valid = attr->ia_valid;
1332         int rc = 0, rc1 = 0;
1333         ENTRY;
1334
1335         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu valid %x\n", inode->i_ino,
1336                attr->ia_valid);
1337
1338         if (ia_valid & ATTR_SIZE) {
1339                 /* Check new size against VFS/VM file size limit and rlimit */
1340                 rc = inode_newsize_ok(inode, attr->ia_size);
1341                 if (rc)
1342                         RETURN(rc);
1343
1344                 /* The maximum Lustre file size is variable, based on the
1345                  * OST maximum object size and number of stripes.  This
1346                  * needs another check in addition to the VFS check above. */
1347                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1348                         CDEBUG(D_INODE,"file "DFID" too large %llu > "LPU64"\n",
1349                                PFID(&lli->lli_fid), attr->ia_size,
1350                                ll_file_maxbytes(inode));
1351                         RETURN(-EFBIG);
1352                 }
1353
1354                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1355         }
1356
1357         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1358         if (ia_valid & TIMES_SET_FLAGS) {
1359                 if (cfs_curproc_fsuid() != inode->i_uid &&
1360                     !cfs_capable(CFS_CAP_FOWNER))
1361                         RETURN(-EPERM);
1362         }
1363
1364         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1365         if (attr->ia_valid & ATTR_CTIME) {
1366                 attr->ia_ctime = CFS_CURRENT_TIME;
1367                 attr->ia_valid |= ATTR_CTIME_SET;
1368         }
1369         if (!(ia_valid & ATTR_ATIME_SET) && (attr->ia_valid & ATTR_ATIME)) {
1370                 attr->ia_atime = CFS_CURRENT_TIME;
1371                 attr->ia_valid |= ATTR_ATIME_SET;
1372         }
1373         if (!(ia_valid & ATTR_MTIME_SET) && (attr->ia_valid & ATTR_MTIME)) {
1374                 attr->ia_mtime = CFS_CURRENT_TIME;
1375                 attr->ia_valid |= ATTR_MTIME_SET;
1376         }
1377
1378         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1379                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %lu\n",
1380                        LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1381                        cfs_time_current_sec());
1382
1383         /* NB: ATTR_SIZE will only be set after this point if the size
1384          * resides on the MDS, ie, this file has no objects. */
1385         if (lsm)
1386                 attr->ia_valid &= ~ATTR_SIZE;
1387
1388         /* We always do an MDS RPC, even if we're only changing the size;
1389          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1390
1391         OBD_ALLOC_PTR(op_data);
1392         if (op_data == NULL)
1393                 RETURN(-ENOMEM);
1394
1395         if (!S_ISDIR(inode->i_mode)) {
1396                 if (ia_valid & ATTR_SIZE)
1397                         UP_WRITE_I_ALLOC_SEM(inode);
1398                 UNLOCK_INODE_MUTEX(inode);
1399                 cfs_down_write(&lli->lli_trunc_sem);
1400                 LOCK_INODE_MUTEX(inode);
1401                 if (ia_valid & ATTR_SIZE)
1402                         DOWN_WRITE_I_ALLOC_SEM(inode);
1403         }
1404
1405         memcpy(&op_data->op_attr, attr, sizeof(*attr));
1406
1407         /* Open epoch for truncate. */
1408         if (exp_connect_som(ll_i2mdexp(inode)) &&
1409             (ia_valid & (ATTR_SIZE | ATTR_MTIME | ATTR_MTIME_SET)))
1410                 op_data->op_flags = MF_EPOCH_OPEN;
1411
1412         rc = ll_md_setattr(dentry, op_data, &mod);
1413         if (rc)
1414                 GOTO(out, rc);
1415
1416         ll_ioepoch_open(lli, op_data->op_ioepoch);
1417         if (!lsm || !S_ISREG(inode->i_mode)) {
1418                 CDEBUG(D_INODE, "no lsm: not setting attrs on OST\n");
1419                 GOTO(out, rc = 0);
1420         }
1421
1422         if (ia_valid & ATTR_SIZE)
1423                 attr->ia_valid |= ATTR_SIZE;
1424         if (ia_valid & (ATTR_SIZE |
1425                         ATTR_ATIME | ATTR_ATIME_SET |
1426                         ATTR_MTIME | ATTR_MTIME_SET))
1427                 /* For truncate and utimes sending attributes to OSTs, setting
1428                  * mtime/atime to the past will be performed under PW [0:EOF]
1429                  * extent lock (new_size:EOF for truncate).  It may seem
1430                  * excessive to send mtime/atime updates to OSTs when not
1431                  * setting times to past, but it is necessary due to possible
1432                  * time de-synchronization between MDT inode and OST objects */
1433                 rc = ll_setattr_ost(inode, attr);
1434         EXIT;
1435 out:
1436         if (op_data) {
1437                 if (op_data->op_ioepoch) {
1438                         rc1 = ll_setattr_done_writing(inode, op_data, mod);
1439                         if (!rc)
1440                                 rc = rc1;
1441                 }
1442                 ll_finish_md_op_data(op_data);
1443         }
1444         if (!S_ISDIR(inode->i_mode))
1445                 cfs_up_write(&lli->lli_trunc_sem);
1446
1447         ll_stats_ops_tally(ll_i2sbi(inode), (ia_valid & ATTR_SIZE) ?
1448                            LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1449
1450         return rc;
1451 }
1452
1453 int ll_setattr(struct dentry *de, struct iattr *attr)
1454 {
1455         int mode = de->d_inode->i_mode;
1456
1457         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1458                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1459                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1460
1461         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1462                                (ATTR_SIZE|ATTR_MODE)) &&
1463             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1464              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1465               !(attr->ia_mode & S_ISGID))))
1466                 attr->ia_valid |= ATTR_FORCE;
1467
1468         if ((mode & S_ISUID) &&
1469             !(attr->ia_mode & S_ISUID) &&
1470             !(attr->ia_valid & ATTR_KILL_SUID))
1471                 attr->ia_valid |= ATTR_KILL_SUID;
1472
1473         if (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1474             !(attr->ia_mode & S_ISGID) &&
1475             !(attr->ia_valid & ATTR_KILL_SGID))
1476                 attr->ia_valid |= ATTR_KILL_SGID;
1477
1478         return ll_setattr_raw(de, attr);
1479 }
1480
1481 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1482                        __u64 max_age, __u32 flags)
1483 {
1484         struct ll_sb_info *sbi = ll_s2sbi(sb);
1485         struct obd_statfs obd_osfs;
1486         int rc;
1487         ENTRY;
1488
1489         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1490         if (rc) {
1491                 CERROR("md_statfs fails: rc = %d\n", rc);
1492                 RETURN(rc);
1493         }
1494
1495         osfs->os_type = sb->s_magic;
1496
1497         CDEBUG(D_SUPER, "MDC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1498                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,osfs->os_files);
1499
1500         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1501                 flags |= OBD_STATFS_NODELAY;
1502
1503         rc = obd_statfs_rqset(sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1504         if (rc) {
1505                 CERROR("obd_statfs fails: rc = %d\n", rc);
1506                 RETURN(rc);
1507         }
1508
1509         CDEBUG(D_SUPER, "OSC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1510                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1511                obd_osfs.os_files);
1512
1513         osfs->os_bsize = obd_osfs.os_bsize;
1514         osfs->os_blocks = obd_osfs.os_blocks;
1515         osfs->os_bfree = obd_osfs.os_bfree;
1516         osfs->os_bavail = obd_osfs.os_bavail;
1517
1518         /* If we don't have as many objects free on the OST as inodes
1519          * on the MDS, we reduce the total number of inodes to
1520          * compensate, so that the "inodes in use" number is correct.
1521          */
1522         if (obd_osfs.os_ffree < osfs->os_ffree) {
1523                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1524                         obd_osfs.os_ffree;
1525                 osfs->os_ffree = obd_osfs.os_ffree;
1526         }
1527
1528         RETURN(rc);
1529 }
1530 #ifndef HAVE_STATFS_DENTRY_PARAM
1531 int ll_statfs(struct super_block *sb, struct kstatfs *sfs)
1532 {
1533 #else
1534 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1535 {
1536         struct super_block *sb = de->d_sb;
1537 #endif
1538         struct obd_statfs osfs;
1539         int rc;
1540
1541         CDEBUG(D_VFSTRACE, "VFS Op: at "LPU64" jiffies\n", get_jiffies_64());
1542         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1543
1544         /* Some amount of caching on the client is allowed */
1545         rc = ll_statfs_internal(sb, &osfs,
1546                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1547                                 0);
1548         if (rc)
1549                 return rc;
1550
1551         statfs_unpack(sfs, &osfs);
1552
1553         /* We need to downshift for all 32-bit kernels, because we can't
1554          * tell if the kernel is being called via sys_statfs64() or not.
1555          * Stop before overflowing f_bsize - in which case it is better
1556          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1557         if (sizeof(long) < 8) {
1558                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1559                         sfs->f_bsize <<= 1;
1560
1561                         osfs.os_blocks >>= 1;
1562                         osfs.os_bfree >>= 1;
1563                         osfs.os_bavail >>= 1;
1564                 }
1565         }
1566
1567         sfs->f_blocks = osfs.os_blocks;
1568         sfs->f_bfree = osfs.os_bfree;
1569         sfs->f_bavail = osfs.os_bavail;
1570
1571         return 0;
1572 }
1573
1574 void ll_inode_size_lock(struct inode *inode, int lock_lsm)
1575 {
1576         struct ll_inode_info *lli;
1577         struct lov_stripe_md *lsm;
1578
1579         LASSERT(!S_ISDIR(inode->i_mode));
1580
1581         lli = ll_i2info(inode);
1582         LASSERT(lli->lli_size_sem_owner != current);
1583         cfs_down(&lli->lli_size_sem);
1584         LASSERT(lli->lli_size_sem_owner == NULL);
1585         lli->lli_size_sem_owner = current;
1586         lsm = lli->lli_smd;
1587         LASSERTF(lsm != NULL || lock_lsm == 0, "lsm %p, lock_lsm %d\n",
1588                  lsm, lock_lsm);
1589         if (lock_lsm)
1590                 lov_stripe_lock(lsm);
1591 }
1592
1593 void ll_inode_size_unlock(struct inode *inode, int unlock_lsm)
1594 {
1595         struct ll_inode_info *lli;
1596         struct lov_stripe_md *lsm;
1597
1598         lli = ll_i2info(inode);
1599         lsm = lli->lli_smd;
1600         LASSERTF(lsm != NULL || unlock_lsm == 0, "lsm %p, lock_lsm %d\n",
1601                  lsm, unlock_lsm);
1602         if (unlock_lsm)
1603                 lov_stripe_unlock(lsm);
1604         LASSERT(lli->lli_size_sem_owner == current);
1605         lli->lli_size_sem_owner = NULL;
1606         cfs_up(&lli->lli_size_sem);
1607 }
1608
1609 void ll_update_inode(struct inode *inode, struct lustre_md *md)
1610 {
1611         struct ll_inode_info *lli = ll_i2info(inode);
1612         struct mdt_body *body = md->body;
1613         struct lov_stripe_md *lsm = md->lsm;
1614         struct ll_sb_info *sbi = ll_i2sbi(inode);
1615
1616         LASSERT ((lsm != NULL) == ((body->valid & OBD_MD_FLEASIZE) != 0));
1617         if (lsm != NULL) {
1618                 LASSERT(S_ISREG(inode->i_mode));
1619
1620                 cfs_mutex_lock(&lli->lli_och_mutex);
1621                 if (lli->lli_smd == NULL) {
1622                         if (lsm->lsm_magic != LOV_MAGIC_V1 &&
1623                             lsm->lsm_magic != LOV_MAGIC_V3) {
1624                                 dump_lsm(D_ERROR, lsm);
1625                                 LBUG();
1626                         }
1627                         CDEBUG(D_INODE, "adding lsm %p to inode %lu/%u(%p)\n",
1628                                lsm, inode->i_ino, inode->i_generation, inode);
1629                         /* cl_file_inode_init must go before lli_smd or a race
1630                          * is possible where client thinks the file has stripes,
1631                          * but lov raid0 is not setup yet and parallel e.g.
1632                          * glimpse would try to use uninitialized lov */
1633                         cl_file_inode_init(inode, md);
1634                         cfs_spin_lock(&lli->lli_lock);
1635                         lli->lli_smd = lsm;
1636                         cfs_spin_unlock(&lli->lli_lock);
1637                         cfs_mutex_unlock(&lli->lli_och_mutex);
1638                         lli->lli_maxbytes = lsm->lsm_maxbytes;
1639                         if (lli->lli_maxbytes > MAX_LFS_FILESIZE)
1640                                 lli->lli_maxbytes = MAX_LFS_FILESIZE;
1641                 } else {
1642                         cfs_mutex_unlock(&lli->lli_och_mutex);
1643                         LASSERT(lli->lli_smd->lsm_magic == lsm->lsm_magic &&
1644                                 lli->lli_smd->lsm_stripe_count ==
1645                                 lsm->lsm_stripe_count);
1646                         if (lov_stripe_md_cmp(lli->lli_smd, lsm)) {
1647                                 CERROR("lsm mismatch for inode %ld\n",
1648                                        inode->i_ino);
1649                                 CERROR("lli_smd:\n");
1650                                 dump_lsm(D_ERROR, lli->lli_smd);
1651                                 CERROR("lsm:\n");
1652                                 dump_lsm(D_ERROR, lsm);
1653                                 LBUG();
1654                         }
1655                 }
1656                 if (lli->lli_smd != lsm)
1657                         obd_free_memmd(ll_i2dtexp(inode), &lsm);
1658         }
1659
1660         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1661                 if (body->valid & OBD_MD_FLRMTPERM)
1662                         ll_update_remote_perm(inode, md->remote_perm);
1663         }
1664 #ifdef CONFIG_FS_POSIX_ACL
1665         else if (body->valid & OBD_MD_FLACL) {
1666                 cfs_spin_lock(&lli->lli_lock);
1667                 if (lli->lli_posix_acl)
1668                         posix_acl_release(lli->lli_posix_acl);
1669                 lli->lli_posix_acl = md->posix_acl;
1670                 cfs_spin_unlock(&lli->lli_lock);
1671         }
1672 #endif
1673         inode->i_ino = cl_fid_build_ino(&body->fid1, 0);
1674         inode->i_generation = cl_fid_build_gen(&body->fid1);
1675
1676         if (body->valid & OBD_MD_FLATIME) {
1677                 if (body->atime > LTIME_S(inode->i_atime))
1678                         LTIME_S(inode->i_atime) = body->atime;
1679                 lli->lli_lvb.lvb_atime = body->atime;
1680         }
1681         if (body->valid & OBD_MD_FLMTIME) {
1682                 if (body->mtime > LTIME_S(inode->i_mtime)) {
1683                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
1684                                "to "LPU64"\n", inode->i_ino,
1685                                LTIME_S(inode->i_mtime), body->mtime);
1686                         LTIME_S(inode->i_mtime) = body->mtime;
1687                 }
1688                 lli->lli_lvb.lvb_mtime = body->mtime;
1689         }
1690         if (body->valid & OBD_MD_FLCTIME) {
1691                 if (body->ctime > LTIME_S(inode->i_ctime))
1692                         LTIME_S(inode->i_ctime) = body->ctime;
1693                 lli->lli_lvb.lvb_ctime = body->ctime;
1694         }
1695         if (body->valid & OBD_MD_FLMODE)
1696                 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
1697         if (body->valid & OBD_MD_FLTYPE)
1698                 inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
1699         LASSERT(inode->i_mode != 0);
1700         if (S_ISREG(inode->i_mode)) {
1701                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1, LL_MAX_BLKSIZE_BITS);
1702         } else {
1703                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1704         }
1705 #ifdef HAVE_INODE_BLKSIZE
1706         inode->i_blksize = 1<<inode->i_blkbits;
1707 #endif
1708         if (body->valid & OBD_MD_FLUID)
1709                 inode->i_uid = body->uid;
1710         if (body->valid & OBD_MD_FLGID)
1711                 inode->i_gid = body->gid;
1712         if (body->valid & OBD_MD_FLFLAGS)
1713                 inode->i_flags = ll_ext_to_inode_flags(body->flags);
1714         if (body->valid & OBD_MD_FLNLINK)
1715                 inode->i_nlink = body->nlink;
1716         if (body->valid & OBD_MD_FLRDEV)
1717                 inode->i_rdev = old_decode_dev(body->rdev);
1718
1719         if (body->valid & OBD_MD_FLID) {
1720                 /* FID shouldn't be changed! */
1721                 if (fid_is_sane(&lli->lli_fid)) {
1722                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->fid1),
1723                                  "Trying to change FID "DFID
1724                                  " to the "DFID", inode %lu/%u(%p)\n",
1725                                  PFID(&lli->lli_fid), PFID(&body->fid1),
1726                                  inode->i_ino, inode->i_generation, inode);
1727                 } else
1728                         lli->lli_fid = body->fid1;
1729         }
1730
1731         LASSERT(fid_seq(&lli->lli_fid) != 0);
1732
1733         if (body->valid & OBD_MD_FLSIZE) {
1734                 if (exp_connect_som(ll_i2mdexp(inode)) &&
1735                     S_ISREG(inode->i_mode) && lli->lli_smd) {
1736                         struct lustre_handle lockh;
1737                         ldlm_mode_t mode;
1738
1739                         /* As it is possible a blocking ast has been processed
1740                          * by this time, we need to check there is an UPDATE
1741                          * lock on the client and set LLIF_MDS_SIZE_LOCK holding
1742                          * it. */
1743                         mode = ll_take_md_lock(inode, MDS_INODELOCK_UPDATE,
1744                                                &lockh);
1745                         if (mode) {
1746                                 if (lli->lli_flags & (LLIF_DONE_WRITING |
1747                                                       LLIF_EPOCH_PENDING |
1748                                                       LLIF_SOM_DIRTY)) {
1749                                         CERROR("ino %lu flags %u still has "
1750                                                "size authority! do not trust "
1751                                                "the size got from MDS\n",
1752                                                inode->i_ino, lli->lli_flags);
1753                                 } else {
1754                                         /* Use old size assignment to avoid
1755                                          * deadlock bz14138 & bz14326 */
1756                                         i_size_write(inode, body->size);
1757                                         lli->lli_flags |= LLIF_MDS_SIZE_LOCK;
1758                                 }
1759                                 ldlm_lock_decref(&lockh, mode);
1760                         }
1761                 } else {
1762                         /* Use old size assignment to avoid
1763                          * deadlock bz14138 & bz14326 */
1764                         i_size_write(inode, body->size);
1765
1766                         CDEBUG(D_VFSTRACE, "inode=%lu, updating i_size %llu\n",
1767                                inode->i_ino, (unsigned long long)body->size);
1768                 }
1769
1770                 if (body->valid & OBD_MD_FLBLOCKS)
1771                         inode->i_blocks = body->blocks;
1772         }
1773
1774         if (body->valid & OBD_MD_FLMDSCAPA) {
1775                 LASSERT(md->mds_capa);
1776                 ll_add_capa(inode, md->mds_capa);
1777         }
1778         if (body->valid & OBD_MD_FLOSSCAPA) {
1779                 LASSERT(md->oss_capa);
1780                 ll_add_capa(inode, md->oss_capa);
1781         }
1782 }
1783
1784 void ll_read_inode2(struct inode *inode, void *opaque)
1785 {
1786         struct lustre_md *md = opaque;
1787         struct ll_inode_info *lli = ll_i2info(inode);
1788         ENTRY;
1789
1790         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1791                PFID(&lli->lli_fid), inode);
1792
1793         LASSERT(!lli->lli_smd);
1794
1795         /* Core attributes from the MDS first.  This is a new inode, and
1796          * the VFS doesn't zero times in the core inode so we have to do
1797          * it ourselves.  They will be overwritten by either MDS or OST
1798          * attributes - we just need to make sure they aren't newer. */
1799         LTIME_S(inode->i_mtime) = 0;
1800         LTIME_S(inode->i_atime) = 0;
1801         LTIME_S(inode->i_ctime) = 0;
1802         inode->i_rdev = 0;
1803         ll_update_inode(inode, md);
1804
1805         /* OIDEBUG(inode); */
1806
1807         /* initializing backing dev info. */
1808         inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
1809
1810
1811         if (S_ISREG(inode->i_mode)) {
1812                 struct ll_sb_info *sbi = ll_i2sbi(inode);
1813                 inode->i_op = &ll_file_inode_operations;
1814                 inode->i_fop = sbi->ll_fop;
1815                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
1816                 EXIT;
1817         } else if (S_ISDIR(inode->i_mode)) {
1818                 inode->i_op = &ll_dir_inode_operations;
1819                 inode->i_fop = &ll_dir_operations;
1820                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_dir_aops;
1821                 EXIT;
1822         } else if (S_ISLNK(inode->i_mode)) {
1823                 inode->i_op = &ll_fast_symlink_inode_operations;
1824                 EXIT;
1825         } else {
1826                 inode->i_op = &ll_special_inode_operations;
1827
1828                 init_special_inode(inode, inode->i_mode,
1829                                    kdev_t_to_nr(inode->i_rdev));
1830
1831                 EXIT;
1832         }
1833 }
1834
1835 void ll_delete_inode(struct inode *inode)
1836 {
1837         struct ll_sb_info *sbi = ll_i2sbi(inode);
1838         int rc;
1839         ENTRY;
1840
1841         rc = obd_fid_delete(sbi->ll_md_exp, ll_inode2fid(inode));
1842         if (rc)
1843                 CERROR("fid_delete() failed, rc %d\n", rc);
1844
1845         truncate_inode_pages(&inode->i_data, 0);
1846
1847         /* Workaround for LU-118 */
1848         if (inode->i_data.nrpages) {
1849                 TREE_READ_LOCK_IRQ(&inode->i_data);
1850                 TREE_READ_UNLOCK_IRQ(&inode->i_data);
1851                 LASSERTF(inode->i_data.nrpages == 0,
1852                          "inode=%lu/%u(%p) nrpages=%lu, see "
1853                          "http://jira.whamcloud.com/browse/LU-118\n",
1854                          inode->i_ino, inode->i_generation, inode,
1855                          inode->i_data.nrpages);
1856         }
1857         /* Workaround end */
1858
1859 #ifdef HAVE_SBOPS_EVICT_INODE
1860         ll_clear_inode(inode);
1861         end_writeback(inode);
1862 #else
1863         clear_inode(inode);
1864 #endif
1865
1866         EXIT;
1867 }
1868
1869 int ll_iocontrol(struct inode *inode, struct file *file,
1870                  unsigned int cmd, unsigned long arg)
1871 {
1872         struct ll_sb_info *sbi = ll_i2sbi(inode);
1873         struct ptlrpc_request *req = NULL;
1874         int rc, flags = 0;
1875         ENTRY;
1876
1877         switch(cmd) {
1878         case FSFILT_IOC_GETFLAGS: {
1879                 struct mdt_body *body;
1880                 struct md_op_data *op_data;
1881
1882                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
1883                                              0, 0, LUSTRE_OPC_ANY,
1884                                              NULL);
1885                 if (IS_ERR(op_data))
1886                         RETURN(PTR_ERR(op_data));
1887
1888                 op_data->op_valid = OBD_MD_FLFLAGS;
1889                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
1890                 ll_finish_md_op_data(op_data);
1891                 if (rc) {
1892                         CERROR("failure %d inode %lu\n", rc, inode->i_ino);
1893                         RETURN(-abs(rc));
1894                 }
1895
1896                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1897
1898                 flags = body->flags;
1899
1900                 ptlrpc_req_finished(req);
1901
1902                 RETURN(put_user(flags, (int *)arg));
1903         }
1904         case FSFILT_IOC_SETFLAGS: {
1905                 struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
1906                 struct obd_info oinfo = { { { 0 } } };
1907                 struct md_op_data *op_data;
1908
1909                 if (get_user(flags, (int *)arg))
1910                         RETURN(-EFAULT);
1911
1912                 oinfo.oi_md = lsm;
1913                 OBDO_ALLOC(oinfo.oi_oa);
1914                 if (!oinfo.oi_oa)
1915                         RETURN(-ENOMEM);
1916
1917                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
1918                                              LUSTRE_OPC_ANY, NULL);
1919                 if (IS_ERR(op_data))
1920                         RETURN(PTR_ERR(op_data));
1921
1922                 ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags = flags;
1923                 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
1924                 rc = md_setattr(sbi->ll_md_exp, op_data,
1925                                 NULL, 0, NULL, 0, &req, NULL);
1926                 ll_finish_md_op_data(op_data);
1927                 ptlrpc_req_finished(req);
1928                 if (rc) {
1929                         OBDO_FREE(oinfo.oi_oa);
1930                         RETURN(rc);
1931                 }
1932
1933                 if (lsm == NULL) {
1934                         OBDO_FREE(oinfo.oi_oa);
1935                         GOTO(update_cache, rc);
1936                 }
1937
1938                 oinfo.oi_oa->o_id = lsm->lsm_object_id;
1939                 oinfo.oi_oa->o_seq = lsm->lsm_object_seq;
1940                 oinfo.oi_oa->o_flags = flags;
1941                 oinfo.oi_oa->o_valid = OBD_MD_FLID | OBD_MD_FLFLAGS |
1942                                        OBD_MD_FLGROUP;
1943                 oinfo.oi_capa = ll_mdscapa_get(inode);
1944                 obdo_set_parent_fid(oinfo.oi_oa, &ll_i2info(inode)->lli_fid);
1945                 rc = obd_setattr_rqset(sbi->ll_dt_exp, &oinfo, NULL);
1946                 capa_put(oinfo.oi_capa);
1947                 OBDO_FREE(oinfo.oi_oa);
1948                 if (rc) {
1949                         if (rc != -EPERM && rc != -EACCES)
1950                                 CERROR("osc_setattr_async fails: rc = %d\n",rc);
1951                         RETURN(rc);
1952                 }
1953
1954                 EXIT;
1955 update_cache:
1956                 inode->i_flags = ll_ext_to_inode_flags(flags);
1957                 return 0;
1958         }
1959         default:
1960                 RETURN(-ENOSYS);
1961         }
1962
1963         RETURN(0);
1964 }
1965
1966 int ll_flush_ctx(struct inode *inode)
1967 {
1968         struct ll_sb_info  *sbi = ll_i2sbi(inode);
1969
1970         CDEBUG(D_SEC, "flush context for user %d\n", cfs_curproc_uid());
1971
1972         obd_set_info_async(NULL, sbi->ll_md_exp,
1973                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
1974                            0, NULL, NULL);
1975         obd_set_info_async(NULL, sbi->ll_dt_exp,
1976                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
1977                            0, NULL, NULL);
1978         return 0;
1979 }
1980
1981 /* umount -f client means force down, don't save state */
1982 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
1983 void ll_umount_begin(struct vfsmount *vfsmnt, int flags)
1984 {
1985         struct super_block *sb = vfsmnt->mnt_sb;
1986 #else
1987 void ll_umount_begin(struct super_block *sb)
1988 {
1989 #endif
1990         struct lustre_sb_info *lsi = s2lsi(sb);
1991         struct ll_sb_info *sbi = ll_s2sbi(sb);
1992         struct obd_device *obd;
1993         struct obd_ioctl_data *ioc_data;
1994         ENTRY;
1995
1996 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
1997         if (!(flags & MNT_FORCE)) {
1998                 EXIT;
1999                 return;
2000         }
2001 #endif
2002
2003         /* Tell the MGC we got umount -f */
2004         lsi->lsi_flags |= LSI_UMOUNT_FORCE;
2005
2006         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2007                sb->s_count, atomic_read(&sb->s_active));
2008
2009         obd = class_exp2obd(sbi->ll_md_exp);
2010         if (obd == NULL) {
2011                 CERROR("Invalid MDC connection handle "LPX64"\n",
2012                        sbi->ll_md_exp->exp_handle.h_cookie);
2013                 EXIT;
2014                 return;
2015         }
2016         obd->obd_force = 1;
2017
2018         obd = class_exp2obd(sbi->ll_dt_exp);
2019         if (obd == NULL) {
2020                 CERROR("Invalid LOV connection handle "LPX64"\n",
2021                        sbi->ll_dt_exp->exp_handle.h_cookie);
2022                 EXIT;
2023                 return;
2024         }
2025         obd->obd_force = 1;
2026
2027         OBD_ALLOC_PTR(ioc_data);
2028         if (ioc_data) {
2029                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2030                               sizeof ioc_data, ioc_data, NULL);
2031
2032                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2033                               sizeof ioc_data, ioc_data, NULL);
2034
2035                 OBD_FREE_PTR(ioc_data);
2036         }
2037
2038
2039         /* Really, we'd like to wait until there are no requests outstanding,
2040          * and then continue.  For now, we just invalidate the requests,
2041          * schedule() and sleep one second if needed, and hope.
2042          */
2043         cfs_schedule();
2044 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
2045         if (atomic_read(&vfsmnt->mnt_count) > 2) {
2046                 cfs_schedule_timeout_and_set_state(CFS_TASK_INTERRUPTIBLE,
2047                                                    cfs_time_seconds(1));
2048                 if (atomic_read(&vfsmnt->mnt_count) > 2)
2049                         LCONSOLE_WARN("Mount still busy with %d refs! You "
2050                                       "may try to umount it a bit later\n",
2051                                       atomic_read(&vfsmnt->mnt_count));
2052         }
2053 #endif
2054
2055         EXIT;
2056 }
2057
2058 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2059 {
2060         struct ll_sb_info *sbi = ll_s2sbi(sb);
2061         char *profilenm = get_profile_name(sb);
2062         int err;
2063         __u32 read_only;
2064
2065         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2066                 read_only = *flags & MS_RDONLY;
2067                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2068                                          sizeof(KEY_READ_ONLY),
2069                                          KEY_READ_ONLY, sizeof(read_only),
2070                                          &read_only, NULL);
2071                 if (err) {
2072                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2073                                       profilenm, read_only ?
2074                                       "read-only" : "read-write", err);
2075                         return err;
2076                 }
2077
2078                 if (read_only)
2079                         sb->s_flags |= MS_RDONLY;
2080                 else
2081                         sb->s_flags &= ~MS_RDONLY;
2082
2083                 if (sbi->ll_flags & LL_SBI_VERBOSE)
2084                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2085                                       read_only ?  "read-only" : "read-write");
2086         }
2087         return 0;
2088 }
2089
2090 int ll_prep_inode(struct inode **inode,
2091                   struct ptlrpc_request *req,
2092                   struct super_block *sb)
2093 {
2094         struct ll_sb_info *sbi = NULL;
2095         struct lustre_md md;
2096         int rc;
2097         ENTRY;
2098
2099         LASSERT(*inode || sb);
2100         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2101         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2102                               sbi->ll_md_exp, &md);
2103         if (rc)
2104                 RETURN(rc);
2105
2106         if (*inode) {
2107                 ll_update_inode(*inode, &md);
2108         } else {
2109                 LASSERT(sb != NULL);
2110
2111                 /*
2112                  * At this point server returns to client's same fid as client
2113                  * generated for creating. So using ->fid1 is okay here.
2114                  */
2115                 LASSERT(fid_is_sane(&md.body->fid1));
2116
2117                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->fid1, 0), &md);
2118                 if (*inode == NULL || IS_ERR(*inode)) {
2119                         if (md.lsm)
2120                                 obd_free_memmd(sbi->ll_dt_exp, &md.lsm);
2121 #ifdef CONFIG_FS_POSIX_ACL
2122                         if (md.posix_acl) {
2123                                 posix_acl_release(md.posix_acl);
2124                                 md.posix_acl = NULL;
2125                         }
2126 #endif
2127                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2128                         *inode = NULL;
2129                         CERROR("new_inode -fatal: rc %d\n", rc);
2130                         GOTO(out, rc);
2131                 }
2132         }
2133
2134 out:
2135         md_free_lustre_md(sbi->ll_md_exp, &md);
2136         RETURN(rc);
2137 }
2138
2139 int ll_obd_statfs(struct inode *inode, void *arg)
2140 {
2141         struct ll_sb_info *sbi = NULL;
2142         struct obd_export *exp;
2143         char *buf = NULL;
2144         struct obd_ioctl_data *data = NULL;
2145         __u32 type;
2146         int len = 0, rc;
2147
2148         if (!inode || !(sbi = ll_i2sbi(inode)))
2149                 GOTO(out_statfs, rc = -EINVAL);
2150
2151         rc = obd_ioctl_getdata(&buf, &len, arg);
2152         if (rc)
2153                 GOTO(out_statfs, rc);
2154
2155         data = (void*)buf;
2156         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2157             !data->ioc_pbuf1 || !data->ioc_pbuf2)
2158                 GOTO(out_statfs, rc = -EINVAL);
2159
2160         if (data->ioc_inllen1 != sizeof(__u32) ||
2161             data->ioc_inllen2 != sizeof(__u32) ||
2162             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2163             data->ioc_plen2 != sizeof(struct obd_uuid))
2164                 GOTO(out_statfs, rc = -EINVAL);
2165
2166         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2167         if (type == LL_STATFS_LMV)
2168                 exp = sbi->ll_md_exp;
2169         else if (type == LL_STATFS_LOV)
2170                 exp = sbi->ll_dt_exp;
2171         else
2172                 GOTO(out_statfs, rc = -ENODEV);
2173
2174         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, NULL);
2175         if (rc)
2176                 GOTO(out_statfs, rc);
2177 out_statfs:
2178         if (buf)
2179                 obd_ioctl_freedata(buf, len);
2180         return rc;
2181 }
2182
2183 int ll_process_config(struct lustre_cfg *lcfg)
2184 {
2185         char *ptr;
2186         void *sb;
2187         struct lprocfs_static_vars lvars;
2188         unsigned long x;
2189         int rc = 0;
2190
2191         lprocfs_llite_init_vars(&lvars);
2192
2193         /* The instance name contains the sb: lustre-client-aacfe000 */
2194         ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2195         if (!ptr || !*(++ptr))
2196                 return -EINVAL;
2197         if (sscanf(ptr, "%lx", &x) != 1)
2198                 return -EINVAL;
2199         sb = (void *)x;
2200         /* This better be a real Lustre superblock! */
2201         LASSERT(s2lsi((struct super_block *)sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2202
2203         /* Note we have not called client_common_fill_super yet, so
2204            proc fns must be able to handle that! */
2205         rc = class_process_proc_param(PARAM_LLITE, lvars.obd_vars,
2206                                       lcfg, sb);
2207         if (rc > 0)
2208                 rc = 0;
2209         return(rc);
2210 }
2211
2212 /* this function prepares md_op_data hint for passing ot down to MD stack. */
2213 struct md_op_data * ll_prep_md_op_data(struct md_op_data *op_data,
2214                                        struct inode *i1, struct inode *i2,
2215                                        const char *name, int namelen,
2216                                        int mode, __u32 opc, void *data)
2217 {
2218         LASSERT(i1 != NULL);
2219
2220         if (namelen > ll_i2sbi(i1)->ll_namelen)
2221                 return ERR_PTR(-ENAMETOOLONG);
2222
2223         if (op_data == NULL)
2224                 OBD_ALLOC_PTR(op_data);
2225
2226         if (op_data == NULL)
2227                 return ERR_PTR(-ENOMEM);
2228
2229         ll_i2gids(op_data->op_suppgids, i1, i2);
2230         op_data->op_fid1 = *ll_inode2fid(i1);
2231         op_data->op_capa1 = ll_mdscapa_get(i1);
2232
2233         if (i2) {
2234                 op_data->op_fid2 = *ll_inode2fid(i2);
2235                 op_data->op_capa2 = ll_mdscapa_get(i2);
2236         } else {
2237                 fid_zero(&op_data->op_fid2);
2238                 op_data->op_capa2 = NULL;
2239         }
2240
2241         op_data->op_name = name;
2242         op_data->op_namelen = namelen;
2243         op_data->op_mode = mode;
2244         op_data->op_mod_time = cfs_time_current_sec();
2245         op_data->op_fsuid = cfs_curproc_fsuid();
2246         op_data->op_fsgid = cfs_curproc_fsgid();
2247         op_data->op_cap = cfs_curproc_cap_pack();
2248         op_data->op_bias = MDS_CHECK_SPLIT;
2249         op_data->op_opc = opc;
2250         op_data->op_mds = 0;
2251         op_data->op_data = data;
2252
2253         /* If the file is being opened after mknod() (normally due to NFS)
2254          * try to use the default stripe data from parent directory for
2255          * allocating OST objects.  Try to pass the parent FID to MDS. */
2256         if (opc == LUSTRE_OPC_CREATE && i1 == i2 && S_ISREG(i2->i_mode) &&
2257             ll_i2info(i2)->lli_smd == NULL) {
2258                 struct ll_inode_info *lli = ll_i2info(i2);
2259
2260                 cfs_spin_lock(&lli->lli_lock);
2261                 if (likely(lli->lli_smd == NULL &&
2262                            !fid_is_zero(&lli->lli_pfid)))
2263                         op_data->op_fid1 = lli->lli_pfid;
2264                 cfs_spin_unlock(&lli->lli_lock);
2265                 /** We ignore parent's capability temporary. */
2266         }
2267
2268         return op_data;
2269 }
2270
2271 void ll_finish_md_op_data(struct md_op_data *op_data)
2272 {
2273         capa_put(op_data->op_capa1);
2274         capa_put(op_data->op_capa2);
2275         OBD_FREE_PTR(op_data);
2276 }
2277
2278 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
2279 {
2280         struct ll_sb_info *sbi;
2281
2282         LASSERT((seq != NULL) && (vfs != NULL));
2283         sbi = ll_s2sbi(vfs->mnt_sb);
2284
2285         if (sbi->ll_flags & LL_SBI_NOLCK)
2286                 seq_puts(seq, ",nolock");
2287
2288         if (sbi->ll_flags & LL_SBI_FLOCK)
2289                 seq_puts(seq, ",flock");
2290
2291         if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2292                 seq_puts(seq, ",localflock");
2293
2294         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2295                 seq_puts(seq, ",user_xattr");
2296
2297         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2298                 seq_puts(seq, ",lazystatfs");
2299
2300         RETURN(0);
2301 }
2302
2303 /**
2304  * Get obd name by cmd, and copy out to user space
2305  */
2306 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2307 {
2308         struct ll_sb_info *sbi = ll_i2sbi(inode);
2309         struct obd_device *obd;
2310         ENTRY;
2311
2312         if (cmd == OBD_IOC_GETDTNAME)
2313                 obd = class_exp2obd(sbi->ll_dt_exp);
2314         else if (cmd == OBD_IOC_GETMDNAME)
2315                 obd = class_exp2obd(sbi->ll_md_exp);
2316         else
2317                 RETURN(-EINVAL);
2318
2319         if (!obd)
2320                 RETURN(-ENOENT);
2321
2322         if (cfs_copy_to_user((void *)arg, obd->obd_name,
2323                              strlen(obd->obd_name) + 1))
2324                 RETURN(-EFAULT);
2325
2326         RETURN(0);
2327 }