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LU-819 utils: Fix lfs getstripe -M
[fs/lustre-release.git] / lustre / llite / llite_lib.c
1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2  * vim:expandtab:shiftwidth=8:tabstop=8:
3  *
4  * GPL HEADER START
5  *
6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 only,
10  * as published by the Free Software Foundation.
11  *
12  * This program is distributed in the hope that it will be useful, but
13  * WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * General Public License version 2 for more details (a copy is included
16  * in the LICENSE file that accompanied this code).
17  *
18  * You should have received a copy of the GNU General Public License
19  * version 2 along with this program; If not, see
20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
21  *
22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23  * CA 95054 USA or visit www.sun.com if you need additional information or
24  * have any questions.
25  *
26  * GPL HEADER END
27  */
28 /*
29  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
30  * Use is subject to license terms.
31  */
32 /*
33  * Copyright (c) 2011 Whamcloud, Inc.
34  */
35 /*
36  * This file is part of Lustre, http://www.lustre.org/
37  * Lustre is a trademark of Sun Microsystems, Inc.
38  *
39  * lustre/llite/llite_lib.c
40  *
41  * Lustre Light Super operations
42  */
43
44 #define DEBUG_SUBSYSTEM S_LLITE
45
46 #include <linux/module.h>
47 #include <linux/types.h>
48 #include <linux/version.h>
49 #include <linux/mm.h>
50
51 #include <lustre_lite.h>
52 #include <lustre_ha.h>
53 #include <lustre_dlm.h>
54 #include <lprocfs_status.h>
55 #include <lustre_disk.h>
56 #include <lustre_param.h>
57 #include <lustre_log.h>
58 #include <cl_object.h>
59 #include <obd_cksum.h>
60 #include "llite_internal.h"
61
62 cfs_mem_cache_t *ll_file_data_slab;
63
64 CFS_LIST_HEAD(ll_super_blocks);
65 cfs_spinlock_t ll_sb_lock = CFS_SPIN_LOCK_UNLOCKED;
66
67 #ifndef MS_HAS_NEW_AOPS
68 extern struct address_space_operations ll_aops;
69 extern struct address_space_operations ll_dir_aops;
70 #else
71 extern struct address_space_operations_ext ll_aops;
72 extern struct address_space_operations_ext ll_dir_aops;
73 #endif
74
75 #ifndef log2
76 #define log2(n) cfs_ffz(~(n))
77 #endif
78
79 static struct ll_sb_info *ll_init_sbi(void)
80 {
81         struct ll_sb_info *sbi = NULL;
82         unsigned long pages;
83         struct sysinfo si;
84         class_uuid_t uuid;
85         int i;
86         ENTRY;
87
88         OBD_ALLOC(sbi, sizeof(*sbi));
89         if (!sbi)
90                 RETURN(NULL);
91
92         cfs_spin_lock_init(&sbi->ll_lock);
93         cfs_init_mutex(&sbi->ll_lco.lco_lock);
94         cfs_spin_lock_init(&sbi->ll_pp_extent_lock);
95         cfs_spin_lock_init(&sbi->ll_process_lock);
96         sbi->ll_rw_stats_on = 0;
97
98         si_meminfo(&si);
99         pages = si.totalram - si.totalhigh;
100         if (pages >> (20 - CFS_PAGE_SHIFT) < 512) {
101 #ifdef HAVE_BGL_SUPPORT
102                 sbi->ll_async_page_max = pages / 4;
103 #else
104                 sbi->ll_async_page_max = pages / 2;
105 #endif
106         } else {
107                 sbi->ll_async_page_max = (pages / 4) * 3;
108         }
109
110         sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
111                                            SBI_DEFAULT_READAHEAD_MAX);
112         sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
113         sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
114                                            SBI_DEFAULT_READAHEAD_WHOLE_MAX;
115         CFS_INIT_LIST_HEAD(&sbi->ll_conn_chain);
116         CFS_INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list);
117
118         ll_generate_random_uuid(uuid);
119         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
120         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
121
122         cfs_spin_lock(&ll_sb_lock);
123         cfs_list_add_tail(&sbi->ll_list, &ll_super_blocks);
124         cfs_spin_unlock(&ll_sb_lock);
125
126 #ifdef ENABLE_CHECKSUM
127         sbi->ll_flags |= LL_SBI_CHECKSUM;
128 #endif
129
130 #ifdef HAVE_LRU_RESIZE_SUPPORT
131         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
132 #endif
133
134         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
135                 cfs_spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i]. \
136                                    pp_r_hist.oh_lock);
137                 cfs_spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i]. \
138                                    pp_w_hist.oh_lock);
139         }
140
141         /* metadata statahead is enabled by default */
142         sbi->ll_sa_max = LL_SA_RPC_DEF;
143         cfs_atomic_set(&sbi->ll_sa_total, 0);
144         cfs_atomic_set(&sbi->ll_sa_wrong, 0);
145         cfs_atomic_set(&sbi->ll_agl_total, 0);
146         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
147
148         RETURN(sbi);
149 }
150
151 void ll_free_sbi(struct super_block *sb)
152 {
153         struct ll_sb_info *sbi = ll_s2sbi(sb);
154         ENTRY;
155
156         if (sbi != NULL) {
157                 cfs_spin_lock(&ll_sb_lock);
158                 cfs_list_del(&sbi->ll_list);
159                 cfs_spin_unlock(&ll_sb_lock);
160                 OBD_FREE(sbi, sizeof(*sbi));
161         }
162         EXIT;
163 }
164
165 static struct dentry_operations ll_d_root_ops = {
166         .d_compare = ll_dcompare,
167         .d_revalidate = ll_revalidate_nd,
168 };
169
170 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
171                                     struct vfsmount *mnt)
172 {
173         struct inode *root = 0;
174         struct ll_sb_info *sbi = ll_s2sbi(sb);
175         struct obd_device *obd;
176         struct obd_capa *oc = NULL;
177         struct obd_statfs *osfs = NULL;
178         struct ptlrpc_request *request = NULL;
179         struct obd_connect_data *data = NULL;
180         struct obd_uuid *uuid;
181         struct md_op_data *op_data;
182         struct lustre_md lmd;
183         obd_valid valid;
184         int size, err, checksum;
185         ENTRY;
186
187         obd = class_name2obd(md);
188         if (!obd) {
189                 CERROR("MD %s: not setup or attached\n", md);
190                 RETURN(-EINVAL);
191         }
192
193         OBD_ALLOC_PTR(data);
194         if (data == NULL)
195                 RETURN(-ENOMEM);
196
197         OBD_ALLOC_PTR(osfs);
198         if (osfs == NULL) {
199                 OBD_FREE_PTR(data);
200                 RETURN(-ENOMEM);
201         }
202
203         if (proc_lustre_fs_root) {
204                 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
205                                                   dt, md);
206                 if (err < 0)
207                         CERROR("could not register mount in /proc/fs/lustre\n");
208         }
209
210         /* indicate the features supported by this client */
211         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
212                                   OBD_CONNECT_ATTRFID  |
213                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
214                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
215                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
216                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
217                                   OBD_CONNECT_RMT_CLIENT | OBD_CONNECT_VBR    |
218                                   OBD_CONNECT_FULL20   | OBD_CONNECT_64BITHASH;
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(obd, 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(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
321         /* for bug 11559. in $LINUX/fs/read_write.c, function do_sendfile():
322          *         retval = in_file->f_op->sendfile(...);
323          *         if (*ppos > max)
324          *                 retval = -EOVERFLOW;
325          *
326          * it will check if *ppos is greater than max. However, max equals to
327          * s_maxbytes, which is a negative integer in a x86_64 box since loff_t
328          * has been defined as a signed long long integer in linux kernel. */
329 #if BITS_PER_LONG == 64
330         sb->s_maxbytes = PAGE_CACHE_MAXBYTES >> 1;
331 #else
332         sb->s_maxbytes = PAGE_CACHE_MAXBYTES;
333 #endif
334         sbi->ll_namelen = osfs->os_namelen;
335         sbi->ll_max_rw_chunk = LL_DEFAULT_MAX_RW_CHUNK;
336
337         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
338             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
339                 LCONSOLE_INFO("Disabling user_xattr feature because "
340                               "it is not supported on the server\n");
341                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
342         }
343
344         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
345 #ifdef MS_POSIXACL
346                 sb->s_flags |= MS_POSIXACL;
347 #endif
348                 sbi->ll_flags |= LL_SBI_ACL;
349         } else {
350                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
351 #ifdef MS_POSIXACL
352                 sb->s_flags &= ~MS_POSIXACL;
353 #endif
354                 sbi->ll_flags &= ~LL_SBI_ACL;
355         }
356
357         if (data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) {
358                 if (!(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
359                         sbi->ll_flags |= LL_SBI_RMT_CLIENT;
360                         LCONSOLE_INFO("client is set as remote by default.\n");
361                 }
362         } else {
363                 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
364                         sbi->ll_flags &= ~LL_SBI_RMT_CLIENT;
365                         LCONSOLE_INFO("client claims to be remote, but server "
366                                       "rejected, forced to be local.\n");
367                 }
368         }
369
370         if (data->ocd_connect_flags & OBD_CONNECT_MDS_CAPA) {
371                 LCONSOLE_INFO("client enabled MDS capability!\n");
372                 sbi->ll_flags |= LL_SBI_MDS_CAPA;
373         }
374
375         if (data->ocd_connect_flags & OBD_CONNECT_OSS_CAPA) {
376                 LCONSOLE_INFO("client enabled OSS capability!\n");
377                 sbi->ll_flags |= LL_SBI_OSS_CAPA;
378         }
379
380         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
381                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
382
383         if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE)
384                 sbi->ll_md_brw_size = data->ocd_brw_size;
385         else
386                 sbi->ll_md_brw_size = CFS_PAGE_SIZE;
387
388         obd = class_name2obd(dt);
389         if (!obd) {
390                 CERROR("DT %s: not setup or attached\n", dt);
391                 GOTO(out_md_fid, err = -ENODEV);
392         }
393
394         data->ocd_connect_flags = OBD_CONNECT_GRANT     | OBD_CONNECT_VERSION  |
395                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
396                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID      |
397                                   OBD_CONNECT_SRVLOCK   | OBD_CONNECT_TRUNCLOCK|
398                                   OBD_CONNECT_AT | OBD_CONNECT_RMT_CLIENT |
399                                   OBD_CONNECT_OSS_CAPA | OBD_CONNECT_VBR|
400                                   OBD_CONNECT_FULL20 | OBD_CONNECT_64BITHASH |
401                                   OBD_CONNECT_MAXBYTES;
402
403         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
404                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
405
406         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_CKSUM)) {
407                 /* OBD_CONNECT_CKSUM should always be set, even if checksums are
408                  * disabled by default, because it can still be enabled on the
409                  * fly via /proc. As a consequence, we still need to come to an
410                  * agreement on the supported algorithms at connect time */
411                 data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
412
413                 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
414                         data->ocd_cksum_types = OBD_CKSUM_ADLER;
415                 else
416                         data->ocd_cksum_types = cksum_types_supported();
417         }
418
419 #ifdef HAVE_LRU_RESIZE_SUPPORT
420         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
421 #endif
422         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
423                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
424
425         CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d "
426                "ocd_grant: %d\n", data->ocd_connect_flags,
427                data->ocd_version, data->ocd_grant);
428
429         obd->obd_upcall.onu_owner = &sbi->ll_lco;
430         obd->obd_upcall.onu_upcall = cl_ocd_update;
431
432         data->ocd_brw_size = PTLRPC_MAX_BRW_SIZE;
433
434         err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data, NULL);
435         if (err == -EBUSY) {
436                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
437                                    "recovery, of which this client is not a "
438                                    "part.  Please wait for recovery to "
439                                    "complete, abort, or time out.\n", dt);
440                 GOTO(out_md_fid, err);
441         } else if (err) {
442                 CERROR("Cannot connect to %s: rc = %d\n", dt, err);
443                 GOTO(out_md_fid, err);
444         }
445
446         err = obd_fid_init(sbi->ll_dt_exp);
447         if (err) {
448                 CERROR("Can't init data layer FID infrastructure, "
449                        "rc %d\n", err);
450                 GOTO(out_dt, err);
451         }
452
453         cfs_mutex_down(&sbi->ll_lco.lco_lock);
454         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
455         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
456         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
457         cfs_mutex_up(&sbi->ll_lco.lco_lock);
458
459         fid_zero(&sbi->ll_root_fid);
460         err = md_getstatus(sbi->ll_md_exp, &sbi->ll_root_fid, &oc);
461         if (err) {
462                 CERROR("cannot mds_connect: rc = %d\n", err);
463                 GOTO(out_lock_cn_cb, err);
464         }
465         if (!fid_is_sane(&sbi->ll_root_fid)) {
466                 CERROR("Invalid root fid during mount\n");
467                 GOTO(out_lock_cn_cb, err = -EINVAL);
468         }
469         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
470
471         sb->s_op = &lustre_super_operations;
472 #if THREAD_SIZE >= 8192
473         sb->s_export_op = &lustre_export_operations;
474 #endif
475
476         /* make root inode
477          * XXX: move this to after cbd setup? */
478         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMDSCAPA;
479         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
480                 valid |= OBD_MD_FLRMTPERM;
481         else if (sbi->ll_flags & LL_SBI_ACL)
482                 valid |= OBD_MD_FLACL;
483
484         OBD_ALLOC_PTR(op_data);
485         if (op_data == NULL)
486                 GOTO(out_lock_cn_cb, err = -ENOMEM);
487
488         op_data->op_fid1 = sbi->ll_root_fid;
489         op_data->op_mode = 0;
490         op_data->op_capa1 = oc;
491         op_data->op_valid = valid;
492
493         err = md_getattr(sbi->ll_md_exp, op_data, &request);
494         if (oc)
495                 capa_put(oc);
496         OBD_FREE_PTR(op_data);
497         if (err) {
498                 CERROR("md_getattr failed for root: rc = %d\n", err);
499                 GOTO(out_lock_cn_cb, err);
500         }
501         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
502                                sbi->ll_md_exp, &lmd);
503         if (err) {
504                 CERROR("failed to understand root inode md: rc = %d\n", err);
505                 ptlrpc_req_finished (request);
506                 GOTO(out_lock_cn_cb, err);
507         }
508
509         LASSERT(fid_is_sane(&sbi->ll_root_fid));
510         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid, 0), &lmd);
511         md_free_lustre_md(sbi->ll_md_exp, &lmd);
512         ptlrpc_req_finished(request);
513
514         if (root == NULL || IS_ERR(root)) {
515                 if (lmd.lsm)
516                         obd_free_memmd(sbi->ll_dt_exp, &lmd.lsm);
517 #ifdef CONFIG_FS_POSIX_ACL
518                 if (lmd.posix_acl) {
519                         posix_acl_release(lmd.posix_acl);
520                         lmd.posix_acl = NULL;
521                 }
522 #endif
523                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
524                 root = NULL;
525                 CERROR("lustre_lite: bad iget4 for root\n");
526                 GOTO(out_root, err);
527         }
528
529         err = ll_close_thread_start(&sbi->ll_lcq);
530         if (err) {
531                 CERROR("cannot start close thread: rc %d\n", err);
532                 GOTO(out_root, err);
533         }
534
535 #ifdef CONFIG_FS_POSIX_ACL
536         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
537                 rct_init(&sbi->ll_rct);
538                 et_init(&sbi->ll_et);
539         }
540 #endif
541
542         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
543         err = obd_set_info_async(sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
544                                  KEY_CHECKSUM, sizeof(checksum), &checksum,
545                                  NULL);
546         cl_sb_init(sb);
547
548         sb->s_root = d_alloc_root(root);
549         sb->s_root->d_op = &ll_d_root_ops;
550
551         sbi->ll_sdev_orig = sb->s_dev;
552
553         /* We set sb->s_dev equal on all lustre clients in order to support
554          * NFS export clustering.  NFSD requires that the FSID be the same
555          * on all clients. */
556         /* s_dev is also used in lt_compare() to compare two fs, but that is
557          * only a node-local comparison. */
558         uuid = obd_get_uuid(sbi->ll_md_exp);
559         if (uuid != NULL)
560                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
561         sbi->ll_mnt = mnt;
562
563         if (data != NULL)
564                 OBD_FREE_PTR(data);
565         if (osfs != NULL)
566                 OBD_FREE_PTR(osfs);
567
568         RETURN(err);
569 out_root:
570         if (root)
571                 iput(root);
572 out_lock_cn_cb:
573         obd_fid_fini(sbi->ll_dt_exp);
574 out_dt:
575         obd_disconnect(sbi->ll_dt_exp);
576         sbi->ll_dt_exp = NULL;
577 out_md_fid:
578         obd_fid_fini(sbi->ll_md_exp);
579 out_md:
580         obd_disconnect(sbi->ll_md_exp);
581         sbi->ll_md_exp = NULL;
582 out:
583         if (data != NULL)
584                 OBD_FREE_PTR(data);
585         if (osfs != NULL)
586                 OBD_FREE_PTR(osfs);
587         lprocfs_unregister_mountpoint(sbi);
588         return err;
589 }
590
591 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
592 {
593         int size, rc;
594
595         *lmmsize = obd_size_diskmd(sbi->ll_dt_exp, NULL);
596         size = sizeof(int);
597         rc = obd_get_info(sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
598                           KEY_MAX_EASIZE, &size, lmmsize, NULL);
599         if (rc)
600                 CERROR("Get max mdsize error rc %d \n", rc);
601
602         RETURN(rc);
603 }
604
605 void ll_dump_inode(struct inode *inode)
606 {
607         struct list_head *tmp;
608         int dentry_count = 0;
609
610         LASSERT(inode != NULL);
611
612         list_for_each(tmp, &inode->i_dentry)
613                 dentry_count++;
614
615         CERROR("inode %p dump: dev=%s ino=%lu mode=%o count=%u, %d dentries\n",
616                inode, ll_i2mdexp(inode)->exp_obd->obd_name, inode->i_ino,
617                inode->i_mode, atomic_read(&inode->i_count), dentry_count);
618 }
619
620 void lustre_dump_dentry(struct dentry *dentry, int recur)
621 {
622         struct list_head *tmp;
623         int subdirs = 0;
624
625         LASSERT(dentry != NULL);
626
627         list_for_each(tmp, &dentry->d_subdirs)
628                 subdirs++;
629
630         CERROR("dentry %p dump: name=%.*s parent=%.*s (%p), inode=%p, count=%u,"
631                " flags=0x%x, fsdata=%p, %d subdirs\n", dentry,
632                dentry->d_name.len, dentry->d_name.name,
633                dentry->d_parent->d_name.len, dentry->d_parent->d_name.name,
634                dentry->d_parent, dentry->d_inode, atomic_read(&dentry->d_count),
635                dentry->d_flags, dentry->d_fsdata, subdirs);
636         if (dentry->d_inode != NULL)
637                 ll_dump_inode(dentry->d_inode);
638
639         if (recur == 0)
640                 return;
641
642        list_for_each(tmp, &dentry->d_subdirs) {
643                 struct dentry *d = list_entry(tmp, struct dentry, d_child);
644                 lustre_dump_dentry(d, recur - 1);
645         }
646 }
647
648 void client_common_put_super(struct super_block *sb)
649 {
650         struct ll_sb_info *sbi = ll_s2sbi(sb);
651         ENTRY;
652
653 #ifdef CONFIG_FS_POSIX_ACL
654         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
655                 et_fini(&sbi->ll_et);
656                 rct_fini(&sbi->ll_rct);
657         }
658 #endif
659
660         obd_cancel_unused(sbi->ll_dt_exp, NULL, 0, NULL);
661
662         ll_close_thread_shutdown(sbi->ll_lcq);
663
664         cl_sb_fini(sb);
665
666         cfs_list_del(&sbi->ll_conn_chain);
667
668         obd_fid_fini(sbi->ll_dt_exp);
669         obd_disconnect(sbi->ll_dt_exp);
670         sbi->ll_dt_exp = NULL;
671
672         lprocfs_unregister_mountpoint(sbi);
673
674         obd_fid_fini(sbi->ll_md_exp);
675         obd_disconnect(sbi->ll_md_exp);
676         sbi->ll_md_exp = NULL;
677
678         EXIT;
679 }
680
681 void ll_kill_super(struct super_block *sb)
682 {
683         struct ll_sb_info *sbi;
684
685         ENTRY;
686
687         /* not init sb ?*/
688         if (!(sb->s_flags & MS_ACTIVE))
689                 return;
690
691         sbi = ll_s2sbi(sb);
692         /* we need restore s_dev from changed for clustred NFS before put_super
693          * because new kernels have cached s_dev and change sb->s_dev in
694          * put_super not affected real removing devices */
695         if (sbi)
696                 sb->s_dev = sbi->ll_sdev_orig;
697         EXIT;
698 }
699
700 char *ll_read_opt(const char *opt, char *data)
701 {
702         char *value;
703         char *retval;
704         ENTRY;
705
706         CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
707         if (strncmp(opt, data, strlen(opt)))
708                 RETURN(NULL);
709         if ((value = strchr(data, '=')) == NULL)
710                 RETURN(NULL);
711
712         value++;
713         OBD_ALLOC(retval, strlen(value) + 1);
714         if (!retval) {
715                 CERROR("out of memory!\n");
716                 RETURN(NULL);
717         }
718
719         memcpy(retval, value, strlen(value)+1);
720         CDEBUG(D_SUPER, "Assigned option: %s, value %s\n", opt, retval);
721         RETURN(retval);
722 }
723
724 static inline int ll_set_opt(const char *opt, char *data, int fl)
725 {
726         if (strncmp(opt, data, strlen(opt)) != 0)
727                 return(0);
728         else
729                 return(fl);
730 }
731
732 /* non-client-specific mount options are parsed in lmd_parse */
733 static int ll_options(char *options, int *flags)
734 {
735         int tmp;
736         char *s1 = options, *s2;
737         ENTRY;
738
739         if (!options)
740                 RETURN(0);
741
742         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
743
744         while (*s1) {
745                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
746                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
747                 if (tmp) {
748                         *flags |= tmp;
749                         goto next;
750                 }
751                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
752                 if (tmp) {
753                         *flags |= tmp;
754                         goto next;
755                 }
756                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
757                 if (tmp) {
758                         *flags |= tmp;
759                         goto next;
760                 }
761                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
762                 if (tmp) {
763                         *flags &= ~tmp;
764                         goto next;
765                 }
766                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
767                 if (tmp) {
768                         *flags |= tmp;
769                         goto next;
770                 }
771                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
772                 if (tmp) {
773                         *flags &= ~tmp;
774                         goto next;
775                 }
776 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2,5,50,0)
777                 tmp = ll_set_opt("acl", s1, LL_SBI_ACL);
778                 if (tmp) {
779                         /* Ignore deprecated mount option.  The client will
780                          * always try to mount with ACL support, whether this
781                          * is used depends on whether server supports it. */
782                         LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
783                                                   "mount option 'acl'.\n");
784                         goto next;
785                 }
786                 tmp = ll_set_opt("noacl", s1, LL_SBI_ACL);
787                 if (tmp) {
788                         LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
789                                                   "mount option 'noacl'.\n");
790                         goto next;
791                 }
792 #else
793 #warning "{no}acl options have been deprecated since 1.8, please remove them"
794 #endif
795                 tmp = ll_set_opt("remote_client", s1, LL_SBI_RMT_CLIENT);
796                 if (tmp) {
797                         *flags |= tmp;
798                         goto next;
799                 }
800
801                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
802                 if (tmp) {
803                         *flags |= tmp;
804                         goto next;
805                 }
806                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
807                 if (tmp) {
808                         *flags &= ~tmp;
809                         goto next;
810                 }
811                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
812                 if (tmp) {
813                         *flags |= tmp;
814                         goto next;
815                 }
816                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
817                 if (tmp) {
818                         *flags &= ~tmp;
819                         goto next;
820                 }
821                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
822                 if (tmp) {
823                         *flags |= tmp;
824                         goto next;
825                 }
826                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
827                 if (tmp) {
828                         *flags &= ~tmp;
829                         goto next;
830                 }
831                 tmp = ll_set_opt("som_preview", s1, LL_SBI_SOM_PREVIEW);
832                 if (tmp) {
833                         *flags |= tmp;
834                         goto next;
835                 }
836                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
837                 if (tmp) {
838                         *flags |= tmp;
839                         goto next;
840                 }
841
842                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
843                                    s1);
844                 RETURN(-EINVAL);
845
846 next:
847                 /* Find next opt */
848                 s2 = strchr(s1, ',');
849                 if (s2 == NULL)
850                         break;
851                 s1 = s2 + 1;
852         }
853         RETURN(0);
854 }
855
856 void ll_lli_init(struct ll_inode_info *lli)
857 {
858         lli->lli_inode_magic = LLI_INODE_MAGIC;
859         lli->lli_flags = 0;
860         lli->lli_ioepoch = 0;
861         cfs_spin_lock_init(&lli->lli_lock);
862         lli->lli_posix_acl = NULL;
863         lli->lli_remote_perms = NULL;
864         cfs_sema_init(&lli->lli_rmtperm_sem, 1);
865         /* Do not set lli_fid, it has been initialized already. */
866         fid_zero(&lli->lli_pfid);
867         CFS_INIT_LIST_HEAD(&lli->lli_close_list);
868         CFS_INIT_LIST_HEAD(&lli->lli_oss_capas);
869         cfs_atomic_set(&lli->lli_open_count, 0);
870         lli->lli_mds_capa = NULL;
871         lli->lli_rmtperm_time = 0;
872         lli->lli_pending_och = NULL;
873         lli->lli_mds_read_och = NULL;
874         lli->lli_mds_write_och = NULL;
875         lli->lli_mds_exec_och = NULL;
876         lli->lli_open_fd_read_count = 0;
877         lli->lli_open_fd_write_count = 0;
878         lli->lli_open_fd_exec_count = 0;
879         cfs_sema_init(&lli->lli_och_sem, 1);
880         cfs_spin_lock_init(&lli->lli_agl_lock);
881         lli->lli_smd = NULL;
882         lli->lli_clob = NULL;
883
884         LASSERT(lli->lli_vfs_inode.i_mode != 0);
885         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
886                 cfs_sema_init(&lli->lli_readdir_sem, 1);
887                 lli->lli_opendir_key = NULL;
888                 lli->lli_sai = NULL;
889                 lli->lli_sa_pos = 0;
890                 lli->lli_def_acl = NULL;
891                 cfs_spin_lock_init(&lli->lli_sa_lock);
892                 lli->lli_opendir_pid = 0;
893         } else {
894                 cfs_sema_init(&lli->lli_size_sem, 1);
895                 lli->lli_size_sem_owner = NULL;
896                 lli->lli_symlink_name = NULL;
897                 lli->lli_maxbytes = PAGE_CACHE_MAXBYTES;
898                 cfs_init_rwsem(&lli->lli_trunc_sem);
899                 cfs_sema_init(&lli->lli_write_sem, 1);
900                 lli->lli_async_rc = 0;
901                 lli->lli_write_rc = 0;
902                 cfs_init_rwsem(&lli->lli_glimpse_sem);
903                 lli->lli_glimpse_time = 0;
904                 CFS_INIT_LIST_HEAD(&lli->lli_agl_list);
905                 lli->lli_agl_index = 0;
906         }
907 }
908
909 static inline int ll_bdi_register(struct backing_dev_info *bdi)
910 {
911 #ifdef HAVE_BDI_REGISTER
912         static atomic_t ll_bdi_num = ATOMIC_INIT(0);
913
914 #ifdef HAVE_BDI_NAME
915         bdi->name = "lustre";
916 #endif
917         return bdi_register(bdi, NULL, "lustre-%d",
918                             atomic_inc_return(&ll_bdi_num));
919 #else
920         return 0;
921 #endif
922 }
923
924 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
925 {
926         struct lustre_profile *lprof = NULL;
927         struct lustre_sb_info *lsi = s2lsi(sb);
928         struct ll_sb_info *sbi;
929         char  *dt = NULL, *md = NULL;
930         char  *profilenm = get_profile_name(sb);
931         struct config_llog_instance *cfg;
932         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
933         const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
934         int    err;
935         ENTRY;
936
937         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
938
939         OBD_ALLOC_PTR(cfg);
940         if (cfg == NULL)
941                 RETURN(-ENOMEM);
942
943         cfs_module_get();
944
945         /* client additional sb info */
946         lsi->lsi_llsbi = sbi = ll_init_sbi();
947         if (!sbi) {
948                 cfs_module_put(THIS_MODULE);
949                 OBD_FREE_PTR(cfg);
950                 RETURN(-ENOMEM);
951         }
952
953         err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
954         if (err)
955                 GOTO(out_free, err);
956
957         err = ll_bdi_init(&lsi->lsi_bdi);
958         if (err)
959                 GOTO(out_free, err);
960         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
961         lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
962         err = ll_bdi_register(&lsi->lsi_bdi);
963         if (err)
964                 GOTO(out_free, err);
965
966 #ifdef HAVE_SB_BDI
967         sb->s_bdi = &lsi->lsi_bdi;
968 #endif
969
970         /* Generate a string unique to this super, in case some joker tries
971            to mount the same fs at two mount points.
972            Use the address of the super itself.*/
973         cfg->cfg_instance = sb;
974         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
975
976         /* set up client obds */
977         err = lustre_process_log(sb, profilenm, cfg);
978         if (err < 0) {
979                 CERROR("Unable to process log: %d\n", err);
980                 GOTO(out_free, err);
981         }
982
983         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
984         lprof = class_get_profile(profilenm);
985         if (lprof == NULL) {
986                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
987                                    " read from the MGS.  Does that filesystem "
988                                    "exist?\n", profilenm);
989                 GOTO(out_free, err = -EINVAL);
990         }
991         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
992                lprof->lp_md, lprof->lp_dt);
993
994         OBD_ALLOC(dt, strlen(lprof->lp_dt) + instlen + 2);
995         if (!dt)
996                 GOTO(out_free, err = -ENOMEM);
997         sprintf(dt, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
998
999         OBD_ALLOC(md, strlen(lprof->lp_md) + instlen + 2);
1000         if (!md)
1001                 GOTO(out_free, err = -ENOMEM);
1002         sprintf(md, "%s-%p", lprof->lp_md, cfg->cfg_instance);
1003
1004         /* connections, registrations, sb setup */
1005         err = client_common_fill_super(sb, md, dt, mnt);
1006
1007 out_free:
1008         if (md)
1009                 OBD_FREE(md, strlen(lprof->lp_md) + instlen + 2);
1010         if (dt)
1011                 OBD_FREE(dt, strlen(lprof->lp_dt) + instlen + 2);
1012         if (err)
1013                 ll_put_super(sb);
1014         else
1015                 LCONSOLE_WARN("Client %s has started\n", profilenm);
1016
1017         OBD_FREE_PTR(cfg);
1018         RETURN(err);
1019 } /* ll_fill_super */
1020
1021
1022 void lu_context_keys_dump(void);
1023
1024 void ll_put_super(struct super_block *sb)
1025 {
1026         struct config_llog_instance cfg;
1027         struct obd_device *obd;
1028         struct lustre_sb_info *lsi = s2lsi(sb);
1029         struct ll_sb_info *sbi = ll_s2sbi(sb);
1030         char *profilenm = get_profile_name(sb);
1031         int force = 1, next;
1032         ENTRY;
1033
1034         CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1035
1036         ll_print_capa_stat(sbi);
1037
1038         cfg.cfg_instance = sb;
1039         lustre_end_log(sb, profilenm, &cfg);
1040
1041         if (sbi->ll_md_exp) {
1042                 obd = class_exp2obd(sbi->ll_md_exp);
1043                 if (obd)
1044                         force = obd->obd_force;
1045         }
1046
1047         /* We need to set force before the lov_disconnect in
1048            lustre_common_put_super, since l_d cleans up osc's as well. */
1049         if (force) {
1050                 next = 0;
1051                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1052                                                      &next)) != NULL) {
1053                         obd->obd_force = force;
1054                 }
1055         }
1056
1057         if (sbi->ll_lcq) {
1058                 /* Only if client_common_fill_super succeeded */
1059                 client_common_put_super(sb);
1060         }
1061
1062         next = 0;
1063         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1064                 class_manual_cleanup(obd);
1065         }
1066
1067         if (profilenm)
1068                 class_del_profile(profilenm);
1069
1070         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1071                 ll_bdi_destroy(&lsi->lsi_bdi);
1072                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1073         }
1074
1075         ll_free_sbi(sb);
1076         lsi->lsi_llsbi = NULL;
1077
1078         lustre_common_put_super(sb);
1079
1080         cl_env_cache_purge(~0);
1081
1082         LCONSOLE_WARN("client %p umount complete\n", cfg.cfg_instance);
1083
1084         cfs_module_put(THIS_MODULE);
1085
1086         EXIT;
1087 } /* client_put_super */
1088
1089 struct inode *ll_inode_from_lock(struct ldlm_lock *lock)
1090 {
1091         struct inode *inode = NULL;
1092         /* NOTE: we depend on atomic igrab() -bzzz */
1093         lock_res_and_lock(lock);
1094         if (lock->l_ast_data) {
1095                 struct ll_inode_info *lli = ll_i2info(lock->l_ast_data);
1096                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1097                         inode = igrab(lock->l_ast_data);
1098                 } else {
1099                         inode = lock->l_ast_data;
1100                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1101                                          D_WARNING, lock, "l_ast_data %p is "
1102                                          "bogus: magic %08x", lock->l_ast_data,
1103                                          lli->lli_inode_magic);
1104                         inode = NULL;
1105                 }
1106         }
1107         unlock_res_and_lock(lock);
1108         return inode;
1109 }
1110
1111 static int null_if_equal(struct ldlm_lock *lock, void *data)
1112 {
1113         if (data == lock->l_ast_data) {
1114                 lock->l_ast_data = NULL;
1115
1116                 if (lock->l_req_mode != lock->l_granted_mode)
1117                         LDLM_ERROR(lock,"clearing inode with ungranted lock");
1118         }
1119
1120         return LDLM_ITER_CONTINUE;
1121 }
1122
1123 void ll_clear_inode(struct inode *inode)
1124 {
1125         struct ll_inode_info *lli = ll_i2info(inode);
1126         struct ll_sb_info *sbi = ll_i2sbi(inode);
1127         ENTRY;
1128
1129         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
1130                inode->i_generation, inode);
1131
1132         if (S_ISDIR(inode->i_mode)) {
1133                 /* these should have been cleared in ll_file_release */
1134                 LASSERT(lli->lli_opendir_key == NULL);
1135                 LASSERT(lli->lli_sai == NULL);
1136                 LASSERT(lli->lli_opendir_pid == 0);
1137         }
1138
1139         ll_i2info(inode)->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
1140         md_change_cbdata(sbi->ll_md_exp, ll_inode2fid(inode),
1141                          null_if_equal, inode);
1142
1143         LASSERT(!lli->lli_open_fd_write_count);
1144         LASSERT(!lli->lli_open_fd_read_count);
1145         LASSERT(!lli->lli_open_fd_exec_count);
1146
1147         if (lli->lli_mds_write_och)
1148                 ll_md_real_close(inode, FMODE_WRITE);
1149         if (lli->lli_mds_exec_och)
1150                 ll_md_real_close(inode, FMODE_EXEC);
1151         if (lli->lli_mds_read_och)
1152                 ll_md_real_close(inode, FMODE_READ);
1153
1154         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1155                 OBD_FREE(lli->lli_symlink_name,
1156                          strlen(lli->lli_symlink_name) + 1);
1157                 lli->lli_symlink_name = NULL;
1158         }
1159
1160         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1161                 LASSERT(lli->lli_posix_acl == NULL);
1162                 if (lli->lli_remote_perms) {
1163                         free_rmtperm_hash(lli->lli_remote_perms);
1164                         lli->lli_remote_perms = NULL;
1165                 }
1166         }
1167 #ifdef CONFIG_FS_POSIX_ACL
1168         else if (lli->lli_posix_acl) {
1169                 LASSERT(cfs_atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1170                 LASSERT(lli->lli_remote_perms == NULL);
1171                 posix_acl_release(lli->lli_posix_acl);
1172                 lli->lli_posix_acl = NULL;
1173         }
1174 #endif
1175         lli->lli_inode_magic = LLI_INODE_DEAD;
1176
1177         ll_clear_inode_capas(inode);
1178         if (!S_ISDIR(inode->i_mode))
1179                 LASSERT(cfs_list_empty(&lli->lli_agl_list));
1180
1181         /*
1182          * XXX This has to be done before lsm is freed below, because
1183          * cl_object still uses inode lsm.
1184          */
1185         cl_inode_fini(inode);
1186
1187         if (lli->lli_smd) {
1188                 obd_free_memmd(sbi->ll_dt_exp, &lli->lli_smd);
1189                 lli->lli_smd = NULL;
1190         }
1191
1192
1193         EXIT;
1194 }
1195
1196 int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data,
1197                   struct md_open_data **mod)
1198 {
1199         struct lustre_md md;
1200         struct inode *inode = dentry->d_inode;
1201         struct ll_sb_info *sbi = ll_i2sbi(inode);
1202         struct ptlrpc_request *request = NULL;
1203         int rc;
1204         ENTRY;
1205
1206         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1207                                      LUSTRE_OPC_ANY, NULL);
1208         if (IS_ERR(op_data))
1209                 RETURN(PTR_ERR(op_data));
1210
1211         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, NULL, 0,
1212                         &request, mod);
1213         if (rc) {
1214                 ptlrpc_req_finished(request);
1215                 if (rc == -ENOENT) {
1216                         inode->i_nlink = 0;
1217                         /* Unlinked special device node? Or just a race?
1218                          * Pretend we done everything. */
1219                         if (!S_ISREG(inode->i_mode) &&
1220                             !S_ISDIR(inode->i_mode))
1221                                 rc = simple_setattr(dentry, &op_data->op_attr);
1222                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1223                         CERROR("md_setattr fails: rc = %d\n", rc);
1224                 }
1225                 RETURN(rc);
1226         }
1227
1228         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1229                               sbi->ll_md_exp, &md);
1230         if (rc) {
1231                 ptlrpc_req_finished(request);
1232                 RETURN(rc);
1233         }
1234
1235         /* We call inode_setattr to adjust timestamps.
1236          * If there is at least some data in file, we cleared ATTR_SIZE
1237          * above to avoid invoking vmtruncate, otherwise it is important
1238          * to call vmtruncate in inode_setattr to update inode->i_size
1239          * (bug 6196) */
1240         rc = simple_setattr(dentry, &op_data->op_attr);
1241
1242         /* Extract epoch data if obtained. */
1243         op_data->op_handle = md.body->handle;
1244         op_data->op_ioepoch = md.body->ioepoch;
1245
1246         ll_update_inode(inode, &md);
1247         ptlrpc_req_finished(request);
1248
1249         RETURN(rc);
1250 }
1251
1252 /* Close IO epoch and send Size-on-MDS attribute update. */
1253 static int ll_setattr_done_writing(struct inode *inode,
1254                                    struct md_op_data *op_data,
1255                                    struct md_open_data *mod)
1256 {
1257         struct ll_inode_info *lli = ll_i2info(inode);
1258         int rc = 0;
1259         ENTRY;
1260
1261         LASSERT(op_data != NULL);
1262         if (!S_ISREG(inode->i_mode))
1263                 RETURN(0);
1264
1265         CDEBUG(D_INODE, "Epoch "LPU64" closed on "DFID" for truncate\n",
1266                op_data->op_ioepoch, PFID(&lli->lli_fid));
1267
1268         op_data->op_flags = MF_EPOCH_CLOSE;
1269         ll_done_writing_attr(inode, op_data);
1270         ll_pack_inode2opdata(inode, op_data, NULL);
1271
1272         rc = md_done_writing(ll_i2sbi(inode)->ll_md_exp, op_data, mod);
1273         if (rc == -EAGAIN) {
1274                 /* MDS has instructed us to obtain Size-on-MDS attribute
1275                  * from OSTs and send setattr to back to MDS. */
1276                 rc = ll_som_update(inode, op_data);
1277         } else if (rc) {
1278                 CERROR("inode %lu mdc truncate failed: rc = %d\n",
1279                        inode->i_ino, rc);
1280         }
1281         RETURN(rc);
1282 }
1283
1284 static int ll_setattr_ost(struct inode *inode, struct iattr *attr)
1285 {
1286         struct obd_capa *capa;
1287         int rc;
1288
1289         if (attr->ia_valid & ATTR_SIZE)
1290                 capa = ll_osscapa_get(inode, CAPA_OPC_OSS_TRUNC);
1291         else
1292                 capa = ll_mdscapa_get(inode);
1293
1294         rc = cl_setattr_ost(inode, attr, capa);
1295
1296         if (attr->ia_valid & ATTR_SIZE)
1297                 ll_truncate_free_capa(capa);
1298         else
1299                 capa_put(capa);
1300
1301         return rc;
1302 }
1303
1304 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1305  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1306  * keep these values until such a time that objects are allocated for it.
1307  * We do the MDS operations first, as it is checking permissions for us.
1308  * We don't to the MDS RPC if there is nothing that we want to store there,
1309  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1310  * going to do an RPC anyways.
1311  *
1312  * If we are doing a truncate, we will send the mtime and ctime updates
1313  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1314  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1315  * at the same time.
1316  */
1317 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr)
1318 {
1319         struct inode *inode = dentry->d_inode;
1320         struct ll_inode_info *lli = ll_i2info(inode);
1321         struct lov_stripe_md *lsm = lli->lli_smd;
1322         struct md_op_data *op_data = NULL;
1323         struct md_open_data *mod = NULL;
1324         int ia_valid = attr->ia_valid;
1325         int rc = 0, rc1 = 0;
1326         ENTRY;
1327
1328         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu valid %x\n", inode->i_ino,
1329                attr->ia_valid);
1330         ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_SETATTR, 1);
1331
1332         if (ia_valid & ATTR_SIZE) {
1333                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1334                         CDEBUG(D_INODE, "file too large %llu > "LPU64"\n",
1335                                attr->ia_size, ll_file_maxbytes(inode));
1336                         RETURN(-EFBIG);
1337                 }
1338
1339                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1340         }
1341
1342         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1343         if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET)) {
1344                 if (cfs_curproc_fsuid() != inode->i_uid &&
1345                     !cfs_capable(CFS_CAP_FOWNER))
1346                         RETURN(-EPERM);
1347         }
1348
1349         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1350         if (attr->ia_valid & ATTR_CTIME) {
1351                 attr->ia_ctime = CFS_CURRENT_TIME;
1352                 attr->ia_valid |= ATTR_CTIME_SET;
1353         }
1354         if (!(ia_valid & ATTR_ATIME_SET) && (attr->ia_valid & ATTR_ATIME)) {
1355                 attr->ia_atime = CFS_CURRENT_TIME;
1356                 attr->ia_valid |= ATTR_ATIME_SET;
1357         }
1358         if (!(ia_valid & ATTR_MTIME_SET) && (attr->ia_valid & ATTR_MTIME)) {
1359                 attr->ia_mtime = CFS_CURRENT_TIME;
1360                 attr->ia_valid |= ATTR_MTIME_SET;
1361         }
1362
1363         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1364                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %lu\n",
1365                        LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1366                        cfs_time_current_sec());
1367
1368         /* NB: ATTR_SIZE will only be set after this point if the size
1369          * resides on the MDS, ie, this file has no objects. */
1370         if (lsm)
1371                 attr->ia_valid &= ~ATTR_SIZE;
1372
1373         /* We always do an MDS RPC, even if we're only changing the size;
1374          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1375
1376         OBD_ALLOC_PTR(op_data);
1377         if (op_data == NULL)
1378                 RETURN(-ENOMEM);
1379
1380         UNLOCK_INODE_MUTEX(inode);
1381         if (ia_valid & ATTR_SIZE)
1382                 UP_WRITE_I_ALLOC_SEM(inode);
1383         if (!S_ISDIR(inode->i_mode))
1384                 cfs_down_write(&lli->lli_trunc_sem);
1385         LOCK_INODE_MUTEX(inode);
1386         if (ia_valid & ATTR_SIZE)
1387                 DOWN_WRITE_I_ALLOC_SEM(inode);
1388
1389         memcpy(&op_data->op_attr, attr, sizeof(*attr));
1390
1391         /* Open epoch for truncate. */
1392         if (exp_connect_som(ll_i2mdexp(inode)) &&
1393             (ia_valid & (ATTR_SIZE | ATTR_MTIME | ATTR_MTIME_SET)))
1394                 op_data->op_flags = MF_EPOCH_OPEN;
1395
1396         rc = ll_md_setattr(dentry, op_data, &mod);
1397         if (rc)
1398                 GOTO(out, rc);
1399
1400         ll_ioepoch_open(lli, op_data->op_ioepoch);
1401         if (!lsm || !S_ISREG(inode->i_mode)) {
1402                 CDEBUG(D_INODE, "no lsm: not setting attrs on OST\n");
1403                 GOTO(out, rc = 0);
1404         }
1405
1406         if (ia_valid & ATTR_SIZE)
1407                 attr->ia_valid |= ATTR_SIZE;
1408         if (ia_valid & (ATTR_SIZE |
1409                         ATTR_ATIME | ATTR_ATIME_SET |
1410                         ATTR_MTIME | ATTR_MTIME_SET))
1411                 /* on truncate and utimes send attributes to osts, setting
1412                  * mtime/atime to past will be performed under PW 0:EOF extent
1413                  * lock (new_size:EOF for truncate)
1414                  * it may seem excessive to send mtime/atime updates to osts
1415                  * when not setting times to past, but it is necessary due to
1416                  * possible time de-synchronization */
1417                 rc = ll_setattr_ost(inode, attr);
1418         EXIT;
1419 out:
1420         if (op_data) {
1421                 if (op_data->op_ioepoch)
1422                         rc1 = ll_setattr_done_writing(inode, op_data, mod);
1423                 ll_finish_md_op_data(op_data);
1424         }
1425         if (!S_ISDIR(inode->i_mode))
1426                 cfs_up_write(&lli->lli_trunc_sem);
1427         return rc ? rc : rc1;
1428 }
1429
1430 int ll_setattr(struct dentry *de, struct iattr *attr)
1431 {
1432         int mode = de->d_inode->i_mode;
1433
1434         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1435                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1436                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1437
1438         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1439                                (ATTR_SIZE|ATTR_MODE)) &&
1440             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1441              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1442               !(attr->ia_mode & S_ISGID))))
1443                 attr->ia_valid |= ATTR_FORCE;
1444
1445         if ((mode & S_ISUID) &&
1446             !(attr->ia_mode & S_ISUID) &&
1447             !(attr->ia_valid & ATTR_KILL_SUID))
1448                 attr->ia_valid |= ATTR_KILL_SUID;
1449
1450         if (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1451             !(attr->ia_mode & S_ISGID) &&
1452             !(attr->ia_valid & ATTR_KILL_SGID))
1453                 attr->ia_valid |= ATTR_KILL_SGID;
1454
1455         return ll_setattr_raw(de, attr);
1456 }
1457
1458 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1459                        __u64 max_age, __u32 flags)
1460 {
1461         struct ll_sb_info *sbi = ll_s2sbi(sb);
1462         struct obd_statfs obd_osfs;
1463         int rc;
1464         ENTRY;
1465
1466         rc = obd_statfs(class_exp2obd(sbi->ll_md_exp), osfs, max_age, flags);
1467         if (rc) {
1468                 CERROR("md_statfs fails: rc = %d\n", rc);
1469                 RETURN(rc);
1470         }
1471
1472         osfs->os_type = sb->s_magic;
1473
1474         CDEBUG(D_SUPER, "MDC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1475                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,osfs->os_files);
1476
1477         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1478                 flags |= OBD_STATFS_NODELAY;
1479
1480         rc = obd_statfs_rqset(class_exp2obd(sbi->ll_dt_exp),
1481                               &obd_osfs, max_age, flags);
1482         if (rc) {
1483                 CERROR("obd_statfs fails: rc = %d\n", rc);
1484                 RETURN(rc);
1485         }
1486
1487         CDEBUG(D_SUPER, "OSC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1488                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1489                obd_osfs.os_files);
1490
1491         osfs->os_bsize = obd_osfs.os_bsize;
1492         osfs->os_blocks = obd_osfs.os_blocks;
1493         osfs->os_bfree = obd_osfs.os_bfree;
1494         osfs->os_bavail = obd_osfs.os_bavail;
1495
1496         /* If we don't have as many objects free on the OST as inodes
1497          * on the MDS, we reduce the total number of inodes to
1498          * compensate, so that the "inodes in use" number is correct.
1499          */
1500         if (obd_osfs.os_ffree < osfs->os_ffree) {
1501                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1502                         obd_osfs.os_ffree;
1503                 osfs->os_ffree = obd_osfs.os_ffree;
1504         }
1505
1506         RETURN(rc);
1507 }
1508 #ifndef HAVE_STATFS_DENTRY_PARAM
1509 int ll_statfs(struct super_block *sb, struct kstatfs *sfs)
1510 {
1511 #else
1512 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1513 {
1514         struct super_block *sb = de->d_sb;
1515 #endif
1516         struct obd_statfs osfs;
1517         int rc;
1518
1519         CDEBUG(D_VFSTRACE, "VFS Op: at "LPU64" jiffies\n", get_jiffies_64());
1520         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1521
1522         /* Some amount of caching on the client is allowed */
1523         rc = ll_statfs_internal(sb, &osfs,
1524                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1525                                 0);
1526         if (rc)
1527                 return rc;
1528
1529         statfs_unpack(sfs, &osfs);
1530
1531         /* We need to downshift for all 32-bit kernels, because we can't
1532          * tell if the kernel is being called via sys_statfs64() or not.
1533          * Stop before overflowing f_bsize - in which case it is better
1534          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1535         if (sizeof(long) < 8) {
1536                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1537                         sfs->f_bsize <<= 1;
1538
1539                         osfs.os_blocks >>= 1;
1540                         osfs.os_bfree >>= 1;
1541                         osfs.os_bavail >>= 1;
1542                 }
1543         }
1544
1545         sfs->f_blocks = osfs.os_blocks;
1546         sfs->f_bfree = osfs.os_bfree;
1547         sfs->f_bavail = osfs.os_bavail;
1548
1549         return 0;
1550 }
1551
1552 void ll_inode_size_lock(struct inode *inode, int lock_lsm)
1553 {
1554         struct ll_inode_info *lli;
1555         struct lov_stripe_md *lsm;
1556
1557         LASSERT(!S_ISDIR(inode->i_mode));
1558
1559         lli = ll_i2info(inode);
1560         LASSERT(lli->lli_size_sem_owner != current);
1561         cfs_down(&lli->lli_size_sem);
1562         LASSERT(lli->lli_size_sem_owner == NULL);
1563         lli->lli_size_sem_owner = current;
1564         lsm = lli->lli_smd;
1565         LASSERTF(lsm != NULL || lock_lsm == 0, "lsm %p, lock_lsm %d\n",
1566                  lsm, lock_lsm);
1567         if (lock_lsm)
1568                 lov_stripe_lock(lsm);
1569 }
1570
1571 void ll_inode_size_unlock(struct inode *inode, int unlock_lsm)
1572 {
1573         struct ll_inode_info *lli;
1574         struct lov_stripe_md *lsm;
1575
1576         lli = ll_i2info(inode);
1577         lsm = lli->lli_smd;
1578         LASSERTF(lsm != NULL || unlock_lsm == 0, "lsm %p, lock_lsm %d\n",
1579                  lsm, unlock_lsm);
1580         if (unlock_lsm)
1581                 lov_stripe_unlock(lsm);
1582         LASSERT(lli->lli_size_sem_owner == current);
1583         lli->lli_size_sem_owner = NULL;
1584         cfs_up(&lli->lli_size_sem);
1585 }
1586
1587 void ll_update_inode(struct inode *inode, struct lustre_md *md)
1588 {
1589         struct ll_inode_info *lli = ll_i2info(inode);
1590         struct mdt_body *body = md->body;
1591         struct lov_stripe_md *lsm = md->lsm;
1592         struct ll_sb_info *sbi = ll_i2sbi(inode);
1593
1594         LASSERT ((lsm != NULL) == ((body->valid & OBD_MD_FLEASIZE) != 0));
1595         if (lsm != NULL) {
1596                 LASSERT(S_ISREG(inode->i_mode));
1597
1598                 cfs_down(&lli->lli_och_sem);
1599                 if (lli->lli_smd == NULL) {
1600                         if (lsm->lsm_magic != LOV_MAGIC_V1 &&
1601                             lsm->lsm_magic != LOV_MAGIC_V3) {
1602                                 dump_lsm(D_ERROR, lsm);
1603                                 LBUG();
1604                         }
1605                         CDEBUG(D_INODE, "adding lsm %p to inode %lu/%u(%p)\n",
1606                                lsm, inode->i_ino, inode->i_generation, inode);
1607                         /* cl_file_inode_init must go before lli_smd or a race
1608                          * is possible where client thinks the file has stripes,
1609                          * but lov raid0 is not setup yet and parallel e.g.
1610                          * glimpse would try to use uninitialized lov */
1611                         cl_file_inode_init(inode, md);
1612                         cfs_spin_lock(&lli->lli_lock);
1613                         lli->lli_smd = lsm;
1614                         cfs_spin_unlock(&lli->lli_lock);
1615                         cfs_up(&lli->lli_och_sem);
1616                         lli->lli_maxbytes = lsm->lsm_maxbytes;
1617                         if (lli->lli_maxbytes > PAGE_CACHE_MAXBYTES)
1618                                 lli->lli_maxbytes = PAGE_CACHE_MAXBYTES;
1619                 } else {
1620                         cfs_up(&lli->lli_och_sem);
1621                         LASSERT(lli->lli_smd->lsm_magic == lsm->lsm_magic &&
1622                                 lli->lli_smd->lsm_stripe_count ==
1623                                 lsm->lsm_stripe_count);
1624                         if (lov_stripe_md_cmp(lli->lli_smd, lsm)) {
1625                                 CERROR("lsm mismatch for inode %ld\n",
1626                                        inode->i_ino);
1627                                 CERROR("lli_smd:\n");
1628                                 dump_lsm(D_ERROR, lli->lli_smd);
1629                                 CERROR("lsm:\n");
1630                                 dump_lsm(D_ERROR, lsm);
1631                                 LBUG();
1632                         }
1633                 }
1634                 if (lli->lli_smd != lsm)
1635                         obd_free_memmd(ll_i2dtexp(inode), &lsm);
1636         }
1637
1638         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1639                 if (body->valid & OBD_MD_FLRMTPERM)
1640                         ll_update_remote_perm(inode, md->remote_perm);
1641         }
1642 #ifdef CONFIG_FS_POSIX_ACL
1643         else if (body->valid & OBD_MD_FLACL) {
1644                 cfs_spin_lock(&lli->lli_lock);
1645                 if (lli->lli_posix_acl)
1646                         posix_acl_release(lli->lli_posix_acl);
1647                 lli->lli_posix_acl = md->posix_acl;
1648                 cfs_spin_unlock(&lli->lli_lock);
1649         }
1650 #endif
1651         inode->i_ino = cl_fid_build_ino(&body->fid1, 0);
1652         inode->i_generation = cl_fid_build_gen(&body->fid1);
1653
1654         if (body->valid & OBD_MD_FLATIME) {
1655                 if (body->atime > LTIME_S(inode->i_atime))
1656                         LTIME_S(inode->i_atime) = body->atime;
1657                 lli->lli_lvb.lvb_atime = body->atime;
1658         }
1659         if (body->valid & OBD_MD_FLMTIME) {
1660                 if (body->mtime > LTIME_S(inode->i_mtime)) {
1661                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
1662                                "to "LPU64"\n", inode->i_ino,
1663                                LTIME_S(inode->i_mtime), body->mtime);
1664                         LTIME_S(inode->i_mtime) = body->mtime;
1665                 }
1666                 lli->lli_lvb.lvb_mtime = body->mtime;
1667         }
1668         if (body->valid & OBD_MD_FLCTIME) {
1669                 if (body->ctime > LTIME_S(inode->i_ctime))
1670                         LTIME_S(inode->i_ctime) = body->ctime;
1671                 lli->lli_lvb.lvb_ctime = body->ctime;
1672         }
1673         if (body->valid & OBD_MD_FLMODE)
1674                 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
1675         if (body->valid & OBD_MD_FLTYPE)
1676                 inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
1677         LASSERT(inode->i_mode != 0);
1678         if (S_ISREG(inode->i_mode)) {
1679                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1, LL_MAX_BLKSIZE_BITS);
1680         } else {
1681                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1682         }
1683 #ifdef HAVE_INODE_BLKSIZE
1684         inode->i_blksize = 1<<inode->i_blkbits;
1685 #endif
1686         if (body->valid & OBD_MD_FLUID)
1687                 inode->i_uid = body->uid;
1688         if (body->valid & OBD_MD_FLGID)
1689                 inode->i_gid = body->gid;
1690         if (body->valid & OBD_MD_FLFLAGS)
1691                 inode->i_flags = ll_ext_to_inode_flags(body->flags);
1692         if (body->valid & OBD_MD_FLNLINK)
1693                 inode->i_nlink = body->nlink;
1694         if (body->valid & OBD_MD_FLRDEV)
1695                 inode->i_rdev = old_decode_dev(body->rdev);
1696
1697         if (body->valid & OBD_MD_FLID) {
1698                 /* FID shouldn't be changed! */
1699                 if (fid_is_sane(&lli->lli_fid)) {
1700                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->fid1),
1701                                  "Trying to change FID "DFID
1702                                  " to the "DFID", inode %lu/%u(%p)\n",
1703                                  PFID(&lli->lli_fid), PFID(&body->fid1),
1704                                  inode->i_ino, inode->i_generation, inode);
1705                 } else
1706                         lli->lli_fid = body->fid1;
1707         }
1708
1709         LASSERT(fid_seq(&lli->lli_fid) != 0);
1710
1711         if (body->valid & OBD_MD_FLSIZE) {
1712                 if (exp_connect_som(ll_i2mdexp(inode)) &&
1713                     S_ISREG(inode->i_mode) && lli->lli_smd) {
1714                         struct lustre_handle lockh;
1715                         ldlm_mode_t mode;
1716
1717                         /* As it is possible a blocking ast has been processed
1718                          * by this time, we need to check there is an UPDATE
1719                          * lock on the client and set LLIF_MDS_SIZE_LOCK holding
1720                          * it. */
1721                         mode = ll_take_md_lock(inode, MDS_INODELOCK_UPDATE,
1722                                                &lockh);
1723                         if (mode) {
1724                                 if (lli->lli_flags & (LLIF_DONE_WRITING |
1725                                                       LLIF_EPOCH_PENDING |
1726                                                       LLIF_SOM_DIRTY)) {
1727                                         CERROR("ino %lu flags %u still has "
1728                                                "size authority! do not trust "
1729                                                "the size got from MDS\n",
1730                                                inode->i_ino, lli->lli_flags);
1731                                 } else {
1732                                         /* Use old size assignment to avoid
1733                                          * deadlock bz14138 & bz14326 */
1734                                         i_size_write(inode, body->size);
1735                                         lli->lli_flags |= LLIF_MDS_SIZE_LOCK;
1736                                 }
1737                                 ldlm_lock_decref(&lockh, mode);
1738                         }
1739                 } else {
1740                         /* Use old size assignment to avoid
1741                          * deadlock bz14138 & bz14326 */
1742                         i_size_write(inode, body->size);
1743
1744                         CDEBUG(D_VFSTRACE, "inode=%lu, updating i_size %llu\n",
1745                                inode->i_ino, (unsigned long long)body->size);
1746                 }
1747
1748                 if (body->valid & OBD_MD_FLBLOCKS)
1749                         inode->i_blocks = body->blocks;
1750         }
1751
1752         if (body->valid & OBD_MD_FLMDSCAPA) {
1753                 LASSERT(md->mds_capa);
1754                 ll_add_capa(inode, md->mds_capa);
1755         }
1756         if (body->valid & OBD_MD_FLOSSCAPA) {
1757                 LASSERT(md->oss_capa);
1758                 ll_add_capa(inode, md->oss_capa);
1759         }
1760 }
1761
1762 void ll_read_inode2(struct inode *inode, void *opaque)
1763 {
1764         struct lustre_md *md = opaque;
1765         struct ll_inode_info *lli = ll_i2info(inode);
1766         ENTRY;
1767
1768         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1769                PFID(&lli->lli_fid), inode);
1770
1771         LASSERT(!lli->lli_smd);
1772
1773         /* Core attributes from the MDS first.  This is a new inode, and
1774          * the VFS doesn't zero times in the core inode so we have to do
1775          * it ourselves.  They will be overwritten by either MDS or OST
1776          * attributes - we just need to make sure they aren't newer. */
1777         LTIME_S(inode->i_mtime) = 0;
1778         LTIME_S(inode->i_atime) = 0;
1779         LTIME_S(inode->i_ctime) = 0;
1780         inode->i_rdev = 0;
1781         ll_update_inode(inode, md);
1782
1783         /* OIDEBUG(inode); */
1784
1785         /* initializing backing dev info. */
1786         inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
1787
1788
1789         if (S_ISREG(inode->i_mode)) {
1790                 struct ll_sb_info *sbi = ll_i2sbi(inode);
1791                 inode->i_op = &ll_file_inode_operations;
1792                 inode->i_fop = sbi->ll_fop;
1793                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
1794                 EXIT;
1795         } else if (S_ISDIR(inode->i_mode)) {
1796                 inode->i_op = &ll_dir_inode_operations;
1797                 inode->i_fop = &ll_dir_operations;
1798                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_dir_aops;
1799                 EXIT;
1800         } else if (S_ISLNK(inode->i_mode)) {
1801                 inode->i_op = &ll_fast_symlink_inode_operations;
1802                 EXIT;
1803         } else {
1804                 inode->i_op = &ll_special_inode_operations;
1805
1806                 init_special_inode(inode, inode->i_mode,
1807                                    kdev_t_to_nr(inode->i_rdev));
1808
1809                 EXIT;
1810         }
1811 }
1812
1813 void ll_delete_inode(struct inode *inode)
1814 {
1815         struct ll_sb_info *sbi = ll_i2sbi(inode);
1816         int rc;
1817         ENTRY;
1818
1819         rc = obd_fid_delete(sbi->ll_md_exp, ll_inode2fid(inode));
1820         if (rc)
1821                 CERROR("fid_delete() failed, rc %d\n", rc);
1822
1823         truncate_inode_pages(&inode->i_data, 0);
1824
1825         /* Workaround for LU-118 */
1826         if (inode->i_data.nrpages) {
1827                 TREE_READ_LOCK_IRQ(&inode->i_data);
1828                 TREE_READ_UNLOCK_IRQ(&inode->i_data);
1829                 LASSERTF(inode->i_data.nrpages == 0,
1830                          "inode=%lu/%u(%p) nrpages=%lu, see "
1831                          "http://jira.whamcloud.com/browse/LU-118\n",
1832                          inode->i_ino, inode->i_generation, inode,
1833                          inode->i_data.nrpages);
1834         }
1835         /* Workaround end */
1836
1837 #ifdef HAVE_SBOPS_EVICT_INODE
1838         ll_clear_inode(inode);
1839         end_writeback(inode);
1840 #else
1841         clear_inode(inode);
1842 #endif
1843
1844         EXIT;
1845 }
1846
1847 int ll_iocontrol(struct inode *inode, struct file *file,
1848                  unsigned int cmd, unsigned long arg)
1849 {
1850         struct ll_sb_info *sbi = ll_i2sbi(inode);
1851         struct ptlrpc_request *req = NULL;
1852         int rc, flags = 0;
1853         ENTRY;
1854
1855         switch(cmd) {
1856         case FSFILT_IOC_GETFLAGS: {
1857                 struct mdt_body *body;
1858                 struct md_op_data *op_data;
1859
1860                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
1861                                              0, 0, LUSTRE_OPC_ANY,
1862                                              NULL);
1863                 if (IS_ERR(op_data))
1864                         RETURN(PTR_ERR(op_data));
1865
1866                 op_data->op_valid = OBD_MD_FLFLAGS;
1867                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
1868                 ll_finish_md_op_data(op_data);
1869                 if (rc) {
1870                         CERROR("failure %d inode %lu\n", rc, inode->i_ino);
1871                         RETURN(-abs(rc));
1872                 }
1873
1874                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1875
1876                 flags = body->flags;
1877
1878                 ptlrpc_req_finished(req);
1879
1880                 RETURN(put_user(flags, (int *)arg));
1881         }
1882         case FSFILT_IOC_SETFLAGS: {
1883                 struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
1884                 struct obd_info oinfo = { { { 0 } } };
1885                 struct md_op_data *op_data;
1886
1887                 if (get_user(flags, (int *)arg))
1888                         RETURN(-EFAULT);
1889
1890                 oinfo.oi_md = lsm;
1891                 OBDO_ALLOC(oinfo.oi_oa);
1892                 if (!oinfo.oi_oa)
1893                         RETURN(-ENOMEM);
1894
1895                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
1896                                              LUSTRE_OPC_ANY, NULL);
1897                 if (IS_ERR(op_data))
1898                         RETURN(PTR_ERR(op_data));
1899
1900                 ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags = flags;
1901                 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
1902                 rc = md_setattr(sbi->ll_md_exp, op_data,
1903                                 NULL, 0, NULL, 0, &req, NULL);
1904                 ll_finish_md_op_data(op_data);
1905                 ptlrpc_req_finished(req);
1906                 if (rc) {
1907                         OBDO_FREE(oinfo.oi_oa);
1908                         RETURN(rc);
1909                 }
1910
1911                 if (lsm == NULL) {
1912                         OBDO_FREE(oinfo.oi_oa);
1913                         GOTO(update_cache, rc);
1914                 }
1915
1916                 oinfo.oi_oa->o_id = lsm->lsm_object_id;
1917                 oinfo.oi_oa->o_seq = lsm->lsm_object_seq;
1918                 oinfo.oi_oa->o_flags = flags;
1919                 oinfo.oi_oa->o_valid = OBD_MD_FLID | OBD_MD_FLFLAGS |
1920                                        OBD_MD_FLGROUP;
1921                 oinfo.oi_capa = ll_mdscapa_get(inode);
1922                 obdo_from_inode(oinfo.oi_oa, inode,
1923                                 &ll_i2info(inode)->lli_fid, 0);
1924                 rc = obd_setattr_rqset(sbi->ll_dt_exp, &oinfo, NULL);
1925                 capa_put(oinfo.oi_capa);
1926                 OBDO_FREE(oinfo.oi_oa);
1927                 if (rc) {
1928                         if (rc != -EPERM && rc != -EACCES)
1929                                 CERROR("osc_setattr_async fails: rc = %d\n",rc);
1930                         RETURN(rc);
1931                 }
1932
1933                 EXIT;
1934 update_cache:
1935                 inode->i_flags = ll_ext_to_inode_flags(flags);
1936                 return 0;
1937         }
1938         default:
1939                 RETURN(-ENOSYS);
1940         }
1941
1942         RETURN(0);
1943 }
1944
1945 int ll_flush_ctx(struct inode *inode)
1946 {
1947         struct ll_sb_info  *sbi = ll_i2sbi(inode);
1948
1949         CDEBUG(D_SEC, "flush context for user %d\n", cfs_curproc_uid());
1950
1951         obd_set_info_async(sbi->ll_md_exp,
1952                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
1953                            0, NULL, NULL);
1954         obd_set_info_async(sbi->ll_dt_exp,
1955                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
1956                            0, NULL, NULL);
1957         return 0;
1958 }
1959
1960 /* umount -f client means force down, don't save state */
1961 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
1962 void ll_umount_begin(struct vfsmount *vfsmnt, int flags)
1963 {
1964         struct super_block *sb = vfsmnt->mnt_sb;
1965 #else
1966 void ll_umount_begin(struct super_block *sb)
1967 {
1968 #endif
1969         struct lustre_sb_info *lsi = s2lsi(sb);
1970         struct ll_sb_info *sbi = ll_s2sbi(sb);
1971         struct obd_device *obd;
1972         struct obd_ioctl_data *ioc_data;
1973         ENTRY;
1974
1975 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
1976         if (!(flags & MNT_FORCE)) {
1977                 EXIT;
1978                 return;
1979         }
1980 #endif
1981
1982         /* Tell the MGC we got umount -f */
1983         lsi->lsi_flags |= LSI_UMOUNT_FORCE;
1984
1985         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
1986                sb->s_count, atomic_read(&sb->s_active));
1987
1988         obd = class_exp2obd(sbi->ll_md_exp);
1989         if (obd == NULL) {
1990                 CERROR("Invalid MDC connection handle "LPX64"\n",
1991                        sbi->ll_md_exp->exp_handle.h_cookie);
1992                 EXIT;
1993                 return;
1994         }
1995         obd->obd_force = 1;
1996
1997         obd = class_exp2obd(sbi->ll_dt_exp);
1998         if (obd == NULL) {
1999                 CERROR("Invalid LOV connection handle "LPX64"\n",
2000                        sbi->ll_dt_exp->exp_handle.h_cookie);
2001                 EXIT;
2002                 return;
2003         }
2004         obd->obd_force = 1;
2005
2006         OBD_ALLOC_PTR(ioc_data);
2007         if (ioc_data) {
2008                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2009                               sizeof ioc_data, ioc_data, NULL);
2010
2011                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2012                               sizeof ioc_data, ioc_data, NULL);
2013
2014                 OBD_FREE_PTR(ioc_data);
2015         }
2016
2017
2018         /* Really, we'd like to wait until there are no requests outstanding,
2019          * and then continue.  For now, we just invalidate the requests,
2020          * schedule() and sleep one second if needed, and hope.
2021          */
2022         cfs_schedule();
2023 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
2024         if (atomic_read(&vfsmnt->mnt_count) > 2) {
2025                 cfs_schedule_timeout_and_set_state(CFS_TASK_INTERRUPTIBLE,
2026                                                    cfs_time_seconds(1));
2027                 if (atomic_read(&vfsmnt->mnt_count) > 2)
2028                         LCONSOLE_WARN("Mount still busy with %d refs! You "
2029                                       "may try to umount it a bit later\n",
2030                                       atomic_read(&vfsmnt->mnt_count));
2031         }
2032 #endif
2033
2034         EXIT;
2035 }
2036
2037 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2038 {
2039         struct ll_sb_info *sbi = ll_s2sbi(sb);
2040         int err;
2041         __u32 read_only;
2042
2043         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2044                 read_only = *flags & MS_RDONLY;
2045                 err = obd_set_info_async(sbi->ll_md_exp,
2046                                          sizeof(KEY_READ_ONLY),
2047                                          KEY_READ_ONLY, sizeof(read_only),
2048                                          &read_only, NULL);
2049                 if (err) {
2050                         CERROR("Failed to change the read-only flag during "
2051                                "remount: %d\n", err);
2052                         return err;
2053                 }
2054
2055                 if (read_only)
2056                         sb->s_flags |= MS_RDONLY;
2057                 else
2058                         sb->s_flags &= ~MS_RDONLY;
2059         }
2060         return 0;
2061 }
2062
2063 int ll_prep_inode(struct inode **inode,
2064                   struct ptlrpc_request *req,
2065                   struct super_block *sb)
2066 {
2067         struct ll_sb_info *sbi = NULL;
2068         struct lustre_md md;
2069         int rc;
2070         ENTRY;
2071
2072         LASSERT(*inode || sb);
2073         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2074         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2075                               sbi->ll_md_exp, &md);
2076         if (rc)
2077                 RETURN(rc);
2078
2079         if (*inode) {
2080                 ll_update_inode(*inode, &md);
2081         } else {
2082                 LASSERT(sb != NULL);
2083
2084                 /*
2085                  * At this point server returns to client's same fid as client
2086                  * generated for creating. So using ->fid1 is okay here.
2087                  */
2088                 LASSERT(fid_is_sane(&md.body->fid1));
2089
2090                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->fid1, 0), &md);
2091                 if (*inode == NULL || IS_ERR(*inode)) {
2092                         if (md.lsm)
2093                                 obd_free_memmd(sbi->ll_dt_exp, &md.lsm);
2094 #ifdef CONFIG_FS_POSIX_ACL
2095                         if (md.posix_acl) {
2096                                 posix_acl_release(md.posix_acl);
2097                                 md.posix_acl = NULL;
2098                         }
2099 #endif
2100                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2101                         *inode = NULL;
2102                         CERROR("new_inode -fatal: rc %d\n", rc);
2103                         GOTO(out, rc);
2104                 }
2105         }
2106
2107 out:
2108         md_free_lustre_md(sbi->ll_md_exp, &md);
2109         RETURN(rc);
2110 }
2111
2112 int ll_obd_statfs(struct inode *inode, void *arg)
2113 {
2114         struct ll_sb_info *sbi = NULL;
2115         struct obd_export *exp;
2116         char *buf = NULL;
2117         struct obd_ioctl_data *data = NULL;
2118         __u32 type;
2119         int len = 0, rc;
2120
2121         if (!inode || !(sbi = ll_i2sbi(inode)))
2122                 GOTO(out_statfs, rc = -EINVAL);
2123
2124         rc = obd_ioctl_getdata(&buf, &len, arg);
2125         if (rc)
2126                 GOTO(out_statfs, rc);
2127
2128         data = (void*)buf;
2129         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2130             !data->ioc_pbuf1 || !data->ioc_pbuf2)
2131                 GOTO(out_statfs, rc = -EINVAL);
2132
2133         if (data->ioc_inllen1 != sizeof(__u32) ||
2134             data->ioc_inllen2 != sizeof(__u32) ||
2135             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2136             data->ioc_plen2 != sizeof(struct obd_uuid))
2137                 GOTO(out_statfs, rc = -EINVAL);
2138
2139         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2140         if (type == LL_STATFS_LMV)
2141                 exp = sbi->ll_md_exp;
2142         else if (type == LL_STATFS_LOV)
2143                 exp = sbi->ll_dt_exp;
2144         else
2145                 GOTO(out_statfs, rc = -ENODEV);
2146
2147         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, NULL);
2148         if (rc)
2149                 GOTO(out_statfs, rc);
2150 out_statfs:
2151         if (buf)
2152                 obd_ioctl_freedata(buf, len);
2153         return rc;
2154 }
2155
2156 int ll_process_config(struct lustre_cfg *lcfg)
2157 {
2158         char *ptr;
2159         void *sb;
2160         struct lprocfs_static_vars lvars;
2161         unsigned long x;
2162         int rc = 0;
2163
2164         lprocfs_llite_init_vars(&lvars);
2165
2166         /* The instance name contains the sb: lustre-client-aacfe000 */
2167         ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2168         if (!ptr || !*(++ptr))
2169                 return -EINVAL;
2170         if (sscanf(ptr, "%lx", &x) != 1)
2171                 return -EINVAL;
2172         sb = (void *)x;
2173         /* This better be a real Lustre superblock! */
2174         LASSERT(s2lsi((struct super_block *)sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2175
2176         /* Note we have not called client_common_fill_super yet, so
2177            proc fns must be able to handle that! */
2178         rc = class_process_proc_param(PARAM_LLITE, lvars.obd_vars,
2179                                       lcfg, sb);
2180         if (rc > 0)
2181                 rc = 0;
2182         return(rc);
2183 }
2184
2185 /* this function prepares md_op_data hint for passing ot down to MD stack. */
2186 struct md_op_data * ll_prep_md_op_data(struct md_op_data *op_data,
2187                                        struct inode *i1, struct inode *i2,
2188                                        const char *name, int namelen,
2189                                        int mode, __u32 opc, void *data)
2190 {
2191         LASSERT(i1 != NULL);
2192
2193         if (namelen > ll_i2sbi(i1)->ll_namelen)
2194                 return ERR_PTR(-ENAMETOOLONG);
2195
2196         if (op_data == NULL)
2197                 OBD_ALLOC_PTR(op_data);
2198
2199         if (op_data == NULL)
2200                 return ERR_PTR(-ENOMEM);
2201
2202         ll_i2gids(op_data->op_suppgids, i1, i2);
2203         op_data->op_fid1 = *ll_inode2fid(i1);
2204         op_data->op_capa1 = ll_mdscapa_get(i1);
2205
2206         if (i2) {
2207                 op_data->op_fid2 = *ll_inode2fid(i2);
2208                 op_data->op_capa2 = ll_mdscapa_get(i2);
2209         } else {
2210                 fid_zero(&op_data->op_fid2);
2211                 op_data->op_capa2 = NULL;
2212         }
2213
2214         op_data->op_name = name;
2215         op_data->op_namelen = namelen;
2216         op_data->op_mode = mode;
2217         op_data->op_mod_time = cfs_time_current_sec();
2218         op_data->op_fsuid = cfs_curproc_fsuid();
2219         op_data->op_fsgid = cfs_curproc_fsgid();
2220         op_data->op_cap = cfs_curproc_cap_pack();
2221         op_data->op_bias = MDS_CHECK_SPLIT;
2222         op_data->op_opc = opc;
2223         op_data->op_mds = 0;
2224         op_data->op_data = data;
2225
2226         /* If the file is being opened after mknod() (normally due to NFS)
2227          * try to use the default stripe data from parent directory for
2228          * allocating OST objects.  Try to pass the parent FID to MDS. */
2229         if (opc == LUSTRE_OPC_CREATE && i1 == i2 && S_ISREG(i2->i_mode) &&
2230             ll_i2info(i2)->lli_smd == NULL) {
2231                 struct ll_inode_info *lli = ll_i2info(i2);
2232
2233                 cfs_spin_lock(&lli->lli_lock);
2234                 if (likely(lli->lli_smd == NULL &&
2235                            !fid_is_zero(&lli->lli_pfid)))
2236                         op_data->op_fid1 = lli->lli_pfid;
2237                 cfs_spin_unlock(&lli->lli_lock);
2238                 /** We ignore parent's capability temporary. */
2239         }
2240
2241         return op_data;
2242 }
2243
2244 void ll_finish_md_op_data(struct md_op_data *op_data)
2245 {
2246         capa_put(op_data->op_capa1);
2247         capa_put(op_data->op_capa2);
2248         OBD_FREE_PTR(op_data);
2249 }
2250
2251 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
2252 {
2253         struct ll_sb_info *sbi;
2254
2255         LASSERT((seq != NULL) && (vfs != NULL));
2256         sbi = ll_s2sbi(vfs->mnt_sb);
2257
2258         if (sbi->ll_flags & LL_SBI_NOLCK)
2259                 seq_puts(seq, ",nolock");
2260
2261         if (sbi->ll_flags & LL_SBI_FLOCK)
2262                 seq_puts(seq, ",flock");
2263
2264         if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2265                 seq_puts(seq, ",localflock");
2266
2267         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2268                 seq_puts(seq, ",user_xattr");
2269
2270         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2271                 seq_puts(seq, ",lazystatfs");
2272
2273         RETURN(0);
2274 }
2275
2276 /**
2277  * Get obd name by cmd, and copy out to user space
2278  */
2279 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2280 {
2281         struct ll_sb_info *sbi = ll_i2sbi(inode);
2282         struct obd_device *obd;
2283         ENTRY;
2284
2285         if (cmd == OBD_IOC_GETDTNAME)
2286                 obd = class_exp2obd(sbi->ll_dt_exp);
2287         else if (cmd == OBD_IOC_GETMDNAME)
2288                 obd = class_exp2obd(sbi->ll_md_exp);
2289         else
2290                 RETURN(-EINVAL);
2291
2292         if (!obd)
2293                 RETURN(-ENOENT);
2294
2295         if (cfs_copy_to_user((void *)arg, obd->obd_name,
2296                              strlen(obd->obd_name) + 1))
2297                 RETURN(-EFAULT);
2298
2299         RETURN(0);
2300 }