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[fs/lustre-release.git] / lustre / llite / llite_lib.c
1 /*
2  * GPL HEADER START
3  *
4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License version 2 only,
8  * as published by the Free Software Foundation.
9  *
10  * This program is distributed in the hope that it will be useful, but
11  * WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13  * General Public License version 2 for more details (a copy is included
14  * in the LICENSE file that accompanied this code).
15  *
16  * You should have received a copy of the GNU General Public License
17  * version 2 along with this program; If not, see
18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
19  *
20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21  * CA 95054 USA or visit www.sun.com if you need additional information or
22  * have any questions.
23  *
24  * GPL HEADER END
25  */
26 /*
27  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
28  * Use is subject to license terms.
29  *
30  * Copyright (c) 2011, 2013, Intel Corporation.
31  */
32 /*
33  * This file is part of Lustre, http://www.lustre.org/
34  * Lustre is a trademark of Sun Microsystems, Inc.
35  *
36  * lustre/llite/llite_lib.c
37  *
38  * Lustre Light Super operations
39  */
40
41 #define DEBUG_SUBSYSTEM S_LLITE
42
43 #include <linux/module.h>
44 #include <linux/types.h>
45 #include <linux/version.h>
46 #include <linux/mm.h>
47
48 #include <lustre_lite.h>
49 #include <lustre_ha.h>
50 #include <lustre_dlm.h>
51 #include <lprocfs_status.h>
52 #include <lustre_disk.h>
53 #include <lustre_param.h>
54 #include <lustre_log.h>
55 #include <cl_object.h>
56 #include <obd_cksum.h>
57 #include "llite_internal.h"
58
59 struct kmem_cache *ll_file_data_slab;
60
61 CFS_LIST_HEAD(ll_super_blocks);
62 DEFINE_SPINLOCK(ll_sb_lock);
63
64 #ifndef MS_HAS_NEW_AOPS
65 extern struct address_space_operations ll_aops;
66 #else
67 extern struct address_space_operations_ext ll_aops;
68 #endif
69
70 #ifndef log2
71 #define log2(n) ffz(~(n))
72 #endif
73
74 static struct ll_sb_info *ll_init_sbi(void)
75 {
76         struct ll_sb_info *sbi = NULL;
77         unsigned long pages;
78         unsigned long lru_page_max;
79         struct sysinfo si;
80         class_uuid_t uuid;
81         int i;
82         ENTRY;
83
84         OBD_ALLOC(sbi, sizeof(*sbi));
85         if (!sbi)
86                 RETURN(NULL);
87
88         spin_lock_init(&sbi->ll_lock);
89         mutex_init(&sbi->ll_lco.lco_lock);
90         spin_lock_init(&sbi->ll_pp_extent_lock);
91         spin_lock_init(&sbi->ll_process_lock);
92         sbi->ll_rw_stats_on = 0;
93
94         si_meminfo(&si);
95         pages = si.totalram - si.totalhigh;
96         lru_page_max = pages / 2;
97
98         /* initialize ll_cache data */
99         cfs_atomic_set(&sbi->ll_cache.ccc_users, 0);
100         sbi->ll_cache.ccc_lru_max = lru_page_max;
101         cfs_atomic_set(&sbi->ll_cache.ccc_lru_left, lru_page_max);
102         spin_lock_init(&sbi->ll_cache.ccc_lru_lock);
103         CFS_INIT_LIST_HEAD(&sbi->ll_cache.ccc_lru);
104
105         cfs_atomic_set(&sbi->ll_cache.ccc_unstable_nr, 0);
106         init_waitqueue_head(&sbi->ll_cache.ccc_unstable_waitq);
107
108         sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
109                                            SBI_DEFAULT_READAHEAD_MAX);
110         sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
111         sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
112                                            SBI_DEFAULT_READAHEAD_WHOLE_MAX;
113         CFS_INIT_LIST_HEAD(&sbi->ll_conn_chain);
114         CFS_INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list);
115
116         ll_generate_random_uuid(uuid);
117         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
118         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
119
120         spin_lock(&ll_sb_lock);
121         cfs_list_add_tail(&sbi->ll_list, &ll_super_blocks);
122         spin_unlock(&ll_sb_lock);
123
124         sbi->ll_flags |= LL_SBI_VERBOSE;
125 #ifdef ENABLE_CHECKSUM
126         sbi->ll_flags |= LL_SBI_CHECKSUM;
127 #endif
128
129 #ifdef HAVE_LRU_RESIZE_SUPPORT
130         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
131 #endif
132
133         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
134                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
135                                pp_r_hist.oh_lock);
136                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
137                                pp_w_hist.oh_lock);
138         }
139
140         /* metadata statahead is enabled by default */
141         sbi->ll_sa_max = LL_SA_RPC_DEF;
142         cfs_atomic_set(&sbi->ll_sa_total, 0);
143         cfs_atomic_set(&sbi->ll_sa_wrong, 0);
144         cfs_atomic_set(&sbi->ll_agl_total, 0);
145         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
146
147         RETURN(sbi);
148 }
149
150 void ll_free_sbi(struct super_block *sb)
151 {
152         struct ll_sb_info *sbi = ll_s2sbi(sb);
153         ENTRY;
154
155         if (sbi != NULL) {
156                 spin_lock(&ll_sb_lock);
157                 cfs_list_del(&sbi->ll_list);
158                 spin_unlock(&ll_sb_lock);
159                 OBD_FREE(sbi, sizeof(*sbi));
160         }
161         EXIT;
162 }
163
164 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
165                                     struct vfsmount *mnt)
166 {
167         struct inode *root = 0;
168         struct ll_sb_info *sbi = ll_s2sbi(sb);
169         struct obd_device *obd;
170         struct obd_capa *oc = NULL;
171         struct obd_statfs *osfs = NULL;
172         struct ptlrpc_request *request = NULL;
173         struct obd_connect_data *data = NULL;
174         struct obd_uuid *uuid;
175         struct md_op_data *op_data;
176         struct lustre_md lmd;
177         obd_valid valid;
178         int size, err, checksum;
179         ENTRY;
180
181         obd = class_name2obd(md);
182         if (!obd) {
183                 CERROR("MD %s: not setup or attached\n", md);
184                 RETURN(-EINVAL);
185         }
186
187         OBD_ALLOC_PTR(data);
188         if (data == NULL)
189                 RETURN(-ENOMEM);
190
191         OBD_ALLOC_PTR(osfs);
192         if (osfs == NULL) {
193                 OBD_FREE_PTR(data);
194                 RETURN(-ENOMEM);
195         }
196
197         /* indicate the features supported by this client */
198         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
199                                   OBD_CONNECT_ATTRFID  |
200                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
201                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
202                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
203                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
204                                   OBD_CONNECT_RMT_CLIENT | OBD_CONNECT_VBR    |
205                                   OBD_CONNECT_FULL20   | OBD_CONNECT_64BITHASH|
206                                   OBD_CONNECT_EINPROGRESS |
207                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
208                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS |
209                                   OBD_CONNECT_MAX_EASIZE |
210                                   OBD_CONNECT_FLOCK_DEAD |
211                                   OBD_CONNECT_DISP_STRIPE;
212
213         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
214                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
215
216 #ifdef HAVE_LRU_RESIZE_SUPPORT
217         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
218                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
219 #endif
220 #ifdef CONFIG_FS_POSIX_ACL
221         data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK;
222 #endif
223
224         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
225                 /* flag mdc connection as lightweight, only used for test
226                  * purpose, use with care */
227                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
228
229         data->ocd_ibits_known = MDS_INODELOCK_FULL;
230         data->ocd_version = LUSTRE_VERSION_CODE;
231
232         if (sb->s_flags & MS_RDONLY)
233                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
234         if (sbi->ll_flags & LL_SBI_USER_XATTR)
235                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
236
237 #ifdef HAVE_MS_FLOCK_LOCK
238         /* force vfs to use lustre handler for flock() calls - bug 10743 */
239         sb->s_flags |= MS_FLOCK_LOCK;
240 #endif
241 #ifdef MS_HAS_NEW_AOPS
242         sb->s_flags |= MS_HAS_NEW_AOPS;
243 #endif
244
245         if (sbi->ll_flags & LL_SBI_FLOCK)
246                 sbi->ll_fop = &ll_file_operations_flock;
247         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
248                 sbi->ll_fop = &ll_file_operations;
249         else
250                 sbi->ll_fop = &ll_file_operations_noflock;
251
252         /* real client */
253         data->ocd_connect_flags |= OBD_CONNECT_REAL;
254         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
255                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
256
257         data->ocd_brw_size = MD_MAX_BRW_SIZE;
258
259         err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid, data, NULL);
260         if (err == -EBUSY) {
261                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
262                                    "recovery, of which this client is not a "
263                                    "part. Please wait for recovery to complete,"
264                                    " abort, or time out.\n", md);
265                 GOTO(out, err);
266         } else if (err) {
267                 CERROR("cannot connect to %s: rc = %d\n", md, err);
268                 GOTO(out, err);
269         }
270
271         sbi->ll_md_exp->exp_connect_data = *data;
272
273         err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
274                            LUSTRE_SEQ_METADATA);
275         if (err) {
276                 CERROR("%s: Can't init metadata layer FID infrastructure, "
277                        "rc = %d\n", sbi->ll_md_exp->exp_obd->obd_name, err);
278                 GOTO(out_md, err);
279         }
280
281         /* For mount, we only need fs info from MDT0, and also in DNE, it
282          * can make sure the client can be mounted as long as MDT0 is
283          * avaible */
284         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
285                         cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
286                         OBD_STATFS_FOR_MDT0);
287         if (err)
288                 GOTO(out_md_fid, err);
289
290         /* This needs to be after statfs to ensure connect has finished.
291          * Note that "data" does NOT contain the valid connect reply.
292          * If connecting to a 1.8 server there will be no LMV device, so
293          * we can access the MDC export directly and exp_connect_flags will
294          * be non-zero, but if accessing an upgraded 2.1 server it will
295          * have the correct flags filled in.
296          * XXX: fill in the LMV exp_connect_flags from MDC(s). */
297         valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
298         if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
299             valid != CLIENT_CONNECT_MDT_REQD) {
300                 char *buf;
301
302                 OBD_ALLOC_WAIT(buf, PAGE_CACHE_SIZE);
303                 obd_connect_flags2str(buf, PAGE_CACHE_SIZE,
304                                       valid ^ CLIENT_CONNECT_MDT_REQD, ",");
305                 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
306                                    "feature(s) needed for correct operation "
307                                    "of this client (%s). Please upgrade "
308                                    "server or downgrade client.\n",
309                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
310                 OBD_FREE(buf, PAGE_CACHE_SIZE);
311                 GOTO(out_md_fid, err = -EPROTO);
312         }
313
314         size = sizeof(*data);
315         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
316                            KEY_CONN_DATA,  &size, data, NULL);
317         if (err) {
318                 CERROR("%s: Get connect data failed: rc = %d\n",
319                        sbi->ll_md_exp->exp_obd->obd_name, err);
320                 GOTO(out_md_fid, err);
321         }
322
323         LASSERT(osfs->os_bsize);
324         sb->s_blocksize = osfs->os_bsize;
325         sb->s_blocksize_bits = log2(osfs->os_bsize);
326         sb->s_magic = LL_SUPER_MAGIC;
327         sb->s_maxbytes = MAX_LFS_FILESIZE;
328         sbi->ll_namelen = osfs->os_namelen;
329         sbi->ll_max_rw_chunk = LL_DEFAULT_MAX_RW_CHUNK;
330
331         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
332             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
333                 LCONSOLE_INFO("Disabling user_xattr feature because "
334                               "it is not supported on the server\n");
335                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
336         }
337
338         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
339 #ifdef MS_POSIXACL
340                 sb->s_flags |= MS_POSIXACL;
341 #endif
342                 sbi->ll_flags |= LL_SBI_ACL;
343         } else {
344                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
345 #ifdef MS_POSIXACL
346                 sb->s_flags &= ~MS_POSIXACL;
347 #endif
348                 sbi->ll_flags &= ~LL_SBI_ACL;
349         }
350
351         if (data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) {
352                 if (!(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
353                         sbi->ll_flags |= LL_SBI_RMT_CLIENT;
354                         LCONSOLE_INFO("client is set as remote by default.\n");
355                 }
356         } else {
357                 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
358                         sbi->ll_flags &= ~LL_SBI_RMT_CLIENT;
359                         LCONSOLE_INFO("client claims to be remote, but server "
360                                       "rejected, forced to be local.\n");
361                 }
362         }
363
364         if (data->ocd_connect_flags & OBD_CONNECT_MDS_CAPA) {
365                 LCONSOLE_INFO("client enabled MDS capability!\n");
366                 sbi->ll_flags |= LL_SBI_MDS_CAPA;
367         }
368
369         if (data->ocd_connect_flags & OBD_CONNECT_OSS_CAPA) {
370                 LCONSOLE_INFO("client enabled OSS capability!\n");
371                 sbi->ll_flags |= LL_SBI_OSS_CAPA;
372         }
373
374         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
375                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
376
377         if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE)
378                 sbi->ll_md_brw_size = data->ocd_brw_size;
379         else
380                 sbi->ll_md_brw_size = PAGE_CACHE_SIZE;
381
382         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK)
383                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
384
385         if (data->ocd_ibits_known & MDS_INODELOCK_XATTR) {
386                 if (!(data->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)) {
387                         LCONSOLE_INFO("%s: disabling xattr cache due to "
388                                       "unknown maximum xattr size.\n", dt);
389                 } else {
390                         sbi->ll_flags |= LL_SBI_XATTR_CACHE;
391                         sbi->ll_xattr_cache_enabled = 1;
392                 }
393         }
394
395         obd = class_name2obd(dt);
396         if (!obd) {
397                 CERROR("DT %s: not setup or attached\n", dt);
398                 GOTO(out_md_fid, err = -ENODEV);
399         }
400
401         data->ocd_connect_flags = OBD_CONNECT_GRANT     | OBD_CONNECT_VERSION  |
402                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
403                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID      |
404                                   OBD_CONNECT_SRVLOCK   | OBD_CONNECT_TRUNCLOCK|
405                                   OBD_CONNECT_AT | OBD_CONNECT_RMT_CLIENT |
406                                   OBD_CONNECT_OSS_CAPA | OBD_CONNECT_VBR|
407                                   OBD_CONNECT_FULL20 | OBD_CONNECT_64BITHASH |
408                                   OBD_CONNECT_MAXBYTES |
409                                   OBD_CONNECT_EINPROGRESS |
410                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
411                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS;
412
413         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
414                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
415
416         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_CKSUM)) {
417                 /* OBD_CONNECT_CKSUM should always be set, even if checksums are
418                  * disabled by default, because it can still be enabled on the
419                  * fly via /proc. As a consequence, we still need to come to an
420                  * agreement on the supported algorithms at connect time */
421                 data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
422
423                 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
424                         data->ocd_cksum_types = OBD_CKSUM_ADLER;
425                 else
426                         data->ocd_cksum_types = cksum_types_supported_client();
427         }
428
429 #ifdef HAVE_LRU_RESIZE_SUPPORT
430         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
431 #endif
432         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
433                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
434
435         CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d "
436                "ocd_grant: %d\n", data->ocd_connect_flags,
437                data->ocd_version, data->ocd_grant);
438
439         obd->obd_upcall.onu_owner = &sbi->ll_lco;
440         obd->obd_upcall.onu_upcall = cl_ocd_update;
441
442         data->ocd_brw_size = DT_MAX_BRW_SIZE;
443
444         err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data,
445                           NULL);
446         if (err == -EBUSY) {
447                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
448                                    "recovery, of which this client is not a "
449                                    "part.  Please wait for recovery to "
450                                    "complete, abort, or time out.\n", dt);
451                 GOTO(out_md, err);
452         } else if (err) {
453                 CERROR("%s: Cannot connect to %s: rc = %d\n",
454                        sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
455                 GOTO(out_md, err);
456         }
457
458         sbi->ll_dt_exp->exp_connect_data = *data;
459
460         err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
461                            LUSTRE_SEQ_METADATA);
462         if (err) {
463                 CERROR("%s: Can't init data layer FID infrastructure, "
464                        "rc = %d\n", sbi->ll_dt_exp->exp_obd->obd_name, err);
465                 GOTO(out_dt, err);
466         }
467
468         mutex_lock(&sbi->ll_lco.lco_lock);
469         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
470         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
471         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
472         mutex_unlock(&sbi->ll_lco.lco_lock);
473
474         fid_zero(&sbi->ll_root_fid);
475         err = md_getstatus(sbi->ll_md_exp, &sbi->ll_root_fid, &oc);
476         if (err) {
477                 CERROR("cannot mds_connect: rc = %d\n", err);
478                 GOTO(out_lock_cn_cb, err);
479         }
480         if (!fid_is_sane(&sbi->ll_root_fid)) {
481                 CERROR("%s: Invalid root fid "DFID" during mount\n",
482                        sbi->ll_md_exp->exp_obd->obd_name,
483                        PFID(&sbi->ll_root_fid));
484                 GOTO(out_lock_cn_cb, err = -EINVAL);
485         }
486         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
487
488         sb->s_op = &lustre_super_operations;
489 #if THREAD_SIZE >= 8192 /*b=17630*/
490         sb->s_export_op = &lustre_export_operations;
491 #endif
492
493         /* make root inode
494          * XXX: move this to after cbd setup? */
495         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMDSCAPA;
496         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
497                 valid |= OBD_MD_FLRMTPERM;
498         else if (sbi->ll_flags & LL_SBI_ACL)
499                 valid |= OBD_MD_FLACL;
500
501         OBD_ALLOC_PTR(op_data);
502         if (op_data == NULL)
503                 GOTO(out_lock_cn_cb, err = -ENOMEM);
504
505         op_data->op_fid1 = sbi->ll_root_fid;
506         op_data->op_mode = 0;
507         op_data->op_capa1 = oc;
508         op_data->op_valid = valid;
509
510         err = md_getattr(sbi->ll_md_exp, op_data, &request);
511         if (oc)
512                 capa_put(oc);
513         OBD_FREE_PTR(op_data);
514         if (err) {
515                 CERROR("%s: md_getattr failed for root: rc = %d\n",
516                        sbi->ll_md_exp->exp_obd->obd_name, err);
517                 GOTO(out_lock_cn_cb, err);
518         }
519
520         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
521                                sbi->ll_md_exp, &lmd);
522         if (err) {
523                 CERROR("failed to understand root inode md: rc = %d\n", err);
524                 ptlrpc_req_finished(request);
525                 GOTO(out_lock_cn_cb, err);
526         }
527
528         LASSERT(fid_is_sane(&sbi->ll_root_fid));
529         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
530                                             sbi->ll_flags & LL_SBI_32BIT_API),
531                        &lmd);
532         md_free_lustre_md(sbi->ll_md_exp, &lmd);
533         ptlrpc_req_finished(request);
534
535         if (root == NULL || IS_ERR(root)) {
536                 if (lmd.lsm)
537                         obd_free_memmd(sbi->ll_dt_exp, &lmd.lsm);
538 #ifdef CONFIG_FS_POSIX_ACL
539                 if (lmd.posix_acl) {
540                         posix_acl_release(lmd.posix_acl);
541                         lmd.posix_acl = NULL;
542                 }
543 #endif
544                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
545                 root = NULL;
546                 CERROR("lustre_lite: bad iget4 for root\n");
547                 GOTO(out_root, err);
548         }
549
550         err = ll_close_thread_start(&sbi->ll_lcq);
551         if (err) {
552                 CERROR("cannot start close thread: rc %d\n", err);
553                 GOTO(out_root, err);
554         }
555
556 #ifdef CONFIG_FS_POSIX_ACL
557         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
558                 rct_init(&sbi->ll_rct);
559                 et_init(&sbi->ll_et);
560         }
561 #endif
562
563         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
564         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
565                                  KEY_CHECKSUM, sizeof(checksum), &checksum,
566                                  NULL);
567         cl_sb_init(sb);
568
569         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CACHE_SET),
570                                  KEY_CACHE_SET, sizeof(sbi->ll_cache),
571                                  &sbi->ll_cache, NULL);
572
573         sb->s_root = d_make_root(root);
574         if (sb->s_root == NULL) {
575                 CERROR("%s: can't make root dentry\n",
576                         ll_get_fsname(sb, NULL, 0));
577                 GOTO(out_root, err = -ENOMEM);
578         }
579 #ifdef HAVE_DCACHE_LOCK
580         sb->s_root->d_op = &ll_d_ops;
581 #endif
582
583         sbi->ll_sdev_orig = sb->s_dev;
584
585         /* We set sb->s_dev equal on all lustre clients in order to support
586          * NFS export clustering.  NFSD requires that the FSID be the same
587          * on all clients. */
588         /* s_dev is also used in lt_compare() to compare two fs, but that is
589          * only a node-local comparison. */
590         uuid = obd_get_uuid(sbi->ll_md_exp);
591         if (uuid != NULL)
592                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
593
594         if (data != NULL)
595                 OBD_FREE_PTR(data);
596         if (osfs != NULL)
597                 OBD_FREE_PTR(osfs);
598         if (proc_lustre_fs_root != NULL) {
599                 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
600                                                   dt, md);
601                 if (err < 0) {
602                         CERROR("%s: could not register mount in lprocfs: "
603                                "rc = %d\n", ll_get_fsname(sb, NULL, 0), err);
604                         err = 0;
605                 }
606         }
607
608         RETURN(err);
609 out_root:
610         if (root)
611                 iput(root);
612 out_lock_cn_cb:
613         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
614 out_dt:
615         obd_disconnect(sbi->ll_dt_exp);
616         sbi->ll_dt_exp = NULL;
617         /* Make sure all OScs are gone, since cl_cache is accessing sbi. */
618         obd_zombie_barrier();
619 out_md_fid:
620         obd_fid_fini(sbi->ll_md_exp->exp_obd);
621 out_md:
622         obd_disconnect(sbi->ll_md_exp);
623         sbi->ll_md_exp = NULL;
624 out:
625         if (data != NULL)
626                 OBD_FREE_PTR(data);
627         if (osfs != NULL)
628                 OBD_FREE_PTR(osfs);
629         return err;
630 }
631
632 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
633 {
634         int size, rc;
635
636         *lmmsize = obd_size_diskmd(sbi->ll_dt_exp, NULL);
637         size = sizeof(int);
638         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
639                           KEY_MAX_EASIZE, &size, lmmsize, NULL);
640         if (rc)
641                 CERROR("Get max mdsize error rc %d \n", rc);
642
643         RETURN(rc);
644 }
645
646 void ll_dump_inode(struct inode *inode)
647 {
648         struct ll_d_hlist_node *tmp;
649         int dentry_count = 0;
650
651         LASSERT(inode != NULL);
652
653         ll_d_hlist_for_each(tmp, &inode->i_dentry)
654                 dentry_count++;
655
656         CERROR("%s: inode %p dump: dev=%s fid="DFID
657                " mode=%o count=%u, %d dentries\n",
658                ll_get_fsname(inode->i_sb, NULL, 0), inode,
659                ll_i2mdexp(inode)->exp_obd->obd_name, PFID(ll_inode2fid(inode)),
660                inode->i_mode, atomic_read(&inode->i_count), dentry_count);
661 }
662
663 void lustre_dump_dentry(struct dentry *dentry, int recur)
664 {
665         struct list_head *tmp;
666         int subdirs = 0;
667
668         LASSERT(dentry != NULL);
669
670         list_for_each(tmp, &dentry->d_subdirs)
671                 subdirs++;
672
673         CERROR("dentry %p dump: name=%.*s parent=%.*s (%p), inode=%p, count=%u,"
674                " flags=0x%x, fsdata=%p, %d subdirs\n", dentry,
675                dentry->d_name.len, dentry->d_name.name,
676                dentry->d_parent->d_name.len, dentry->d_parent->d_name.name,
677                dentry->d_parent, dentry->d_inode, d_count(dentry),
678                dentry->d_flags, dentry->d_fsdata, subdirs);
679         if (dentry->d_inode != NULL)
680                 ll_dump_inode(dentry->d_inode);
681
682         if (recur == 0)
683                 return;
684
685         list_for_each(tmp, &dentry->d_subdirs) {
686                 struct dentry *d = list_entry(tmp, struct dentry, d_u.d_child);
687                 lustre_dump_dentry(d, recur - 1);
688         }
689 }
690
691 void client_common_put_super(struct super_block *sb)
692 {
693         struct ll_sb_info *sbi = ll_s2sbi(sb);
694         ENTRY;
695
696 #ifdef CONFIG_FS_POSIX_ACL
697         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
698                 et_fini(&sbi->ll_et);
699                 rct_fini(&sbi->ll_rct);
700         }
701 #endif
702
703         ll_close_thread_shutdown(sbi->ll_lcq);
704
705         cl_sb_fini(sb);
706
707         cfs_list_del(&sbi->ll_conn_chain);
708
709         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
710         obd_disconnect(sbi->ll_dt_exp);
711         sbi->ll_dt_exp = NULL;
712         /* wait till all OSCs are gone, since cl_cache is accessing sbi.
713          * see LU-2543. */
714         obd_zombie_barrier();
715
716         lprocfs_unregister_mountpoint(sbi);
717
718         obd_fid_fini(sbi->ll_md_exp->exp_obd);
719         obd_disconnect(sbi->ll_md_exp);
720         sbi->ll_md_exp = NULL;
721
722         EXIT;
723 }
724
725 void ll_kill_super(struct super_block *sb)
726 {
727         struct ll_sb_info *sbi;
728
729         ENTRY;
730
731         /* not init sb ?*/
732         if (!(sb->s_flags & MS_ACTIVE))
733                 return;
734
735         sbi = ll_s2sbi(sb);
736         /* we need restore s_dev from changed for clustred NFS before put_super
737          * because new kernels have cached s_dev and change sb->s_dev in
738          * put_super not affected real removing devices */
739         if (sbi) {
740                 sb->s_dev = sbi->ll_sdev_orig;
741                 sbi->ll_umounting = 1;
742         }
743         EXIT;
744 }
745
746 char *ll_read_opt(const char *opt, char *data)
747 {
748         char *value;
749         char *retval;
750         ENTRY;
751
752         CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
753         if (strncmp(opt, data, strlen(opt)))
754                 RETURN(NULL);
755         if ((value = strchr(data, '=')) == NULL)
756                 RETURN(NULL);
757
758         value++;
759         OBD_ALLOC(retval, strlen(value) + 1);
760         if (!retval) {
761                 CERROR("out of memory!\n");
762                 RETURN(NULL);
763         }
764
765         memcpy(retval, value, strlen(value)+1);
766         CDEBUG(D_SUPER, "Assigned option: %s, value %s\n", opt, retval);
767         RETURN(retval);
768 }
769
770 static inline int ll_set_opt(const char *opt, char *data, int fl)
771 {
772         if (strncmp(opt, data, strlen(opt)) != 0)
773                 return(0);
774         else
775                 return(fl);
776 }
777
778 /* non-client-specific mount options are parsed in lmd_parse */
779 static int ll_options(char *options, int *flags)
780 {
781         int tmp;
782         char *s1 = options, *s2;
783         ENTRY;
784
785         if (!options)
786                 RETURN(0);
787
788         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
789
790         while (*s1) {
791                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
792                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
793                 if (tmp) {
794                         *flags |= tmp;
795                         goto next;
796                 }
797                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
798                 if (tmp) {
799                         *flags |= tmp;
800                         goto next;
801                 }
802                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
803                 if (tmp) {
804                         *flags |= tmp;
805                         goto next;
806                 }
807                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
808                 if (tmp) {
809                         *flags &= ~tmp;
810                         goto next;
811                 }
812                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
813                 if (tmp) {
814                         *flags |= tmp;
815                         goto next;
816                 }
817                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
818                 if (tmp) {
819                         *flags &= ~tmp;
820                         goto next;
821                 }
822 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 6, 51, 0)
823                 tmp = ll_set_opt("acl", s1, LL_SBI_ACL);
824                 if (tmp) {
825                         /* Ignore deprecated mount option.  The client will
826                          * always try to mount with ACL support, whether this
827                          * is used depends on whether server supports it. */
828                         LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
829                                                   "mount option 'acl'.\n");
830                         goto next;
831                 }
832                 tmp = ll_set_opt("noacl", s1, LL_SBI_ACL);
833                 if (tmp) {
834                         LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
835                                                   "mount option 'noacl'.\n");
836                         goto next;
837                 }
838 #else
839 #warning "{no}acl options have been deprecated since 1.8, please remove them"
840 #endif
841                 tmp = ll_set_opt("remote_client", s1, LL_SBI_RMT_CLIENT);
842                 if (tmp) {
843                         *flags |= tmp;
844                         goto next;
845                 }
846                 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
847                 if (tmp) {
848                         *flags |= tmp;
849                         goto next;
850                 }
851                 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
852                 if (tmp) {
853                         *flags &= ~tmp;
854                         goto next;
855                 }
856
857                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
858                 if (tmp) {
859                         *flags |= tmp;
860                         goto next;
861                 }
862                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
863                 if (tmp) {
864                         *flags &= ~tmp;
865                         goto next;
866                 }
867                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
868                 if (tmp) {
869                         *flags |= tmp;
870                         goto next;
871                 }
872                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
873                 if (tmp) {
874                         *flags &= ~tmp;
875                         goto next;
876                 }
877                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
878                 if (tmp) {
879                         *flags |= tmp;
880                         goto next;
881                 }
882                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
883                 if (tmp) {
884                         *flags &= ~tmp;
885                         goto next;
886                 }
887                 tmp = ll_set_opt("som_preview", s1, LL_SBI_SOM_PREVIEW);
888                 if (tmp) {
889                         *flags |= tmp;
890                         goto next;
891                 }
892                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
893                 if (tmp) {
894                         *flags |= tmp;
895                         goto next;
896                 }
897                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
898                 if (tmp) {
899                         *flags |= tmp;
900                         goto next;
901                 }
902                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
903                 if (tmp) {
904                         *flags &= ~tmp;
905                         goto next;
906                 }
907                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
908                                    s1);
909                 RETURN(-EINVAL);
910
911 next:
912                 /* Find next opt */
913                 s2 = strchr(s1, ',');
914                 if (s2 == NULL)
915                         break;
916                 s1 = s2 + 1;
917         }
918         RETURN(0);
919 }
920
921 void ll_lli_init(struct ll_inode_info *lli)
922 {
923         lli->lli_inode_magic = LLI_INODE_MAGIC;
924         lli->lli_flags = 0;
925         lli->lli_ioepoch = 0;
926         lli->lli_maxbytes = MAX_LFS_FILESIZE;
927         spin_lock_init(&lli->lli_lock);
928         lli->lli_posix_acl = NULL;
929         lli->lli_remote_perms = NULL;
930         mutex_init(&lli->lli_rmtperm_mutex);
931         /* Do not set lli_fid, it has been initialized already. */
932         fid_zero(&lli->lli_pfid);
933         CFS_INIT_LIST_HEAD(&lli->lli_close_list);
934         CFS_INIT_LIST_HEAD(&lli->lli_oss_capas);
935         cfs_atomic_set(&lli->lli_open_count, 0);
936         lli->lli_mds_capa = NULL;
937         lli->lli_rmtperm_time = 0;
938         lli->lli_pending_och = NULL;
939         lli->lli_mds_read_och = NULL;
940         lli->lli_mds_write_och = NULL;
941         lli->lli_mds_exec_och = NULL;
942         lli->lli_open_fd_read_count = 0;
943         lli->lli_open_fd_write_count = 0;
944         lli->lli_open_fd_exec_count = 0;
945         mutex_init(&lli->lli_och_mutex);
946         spin_lock_init(&lli->lli_agl_lock);
947         lli->lli_has_smd = false;
948         lli->lli_layout_gen = LL_LAYOUT_GEN_NONE;
949         lli->lli_clob = NULL;
950
951         init_rwsem(&lli->lli_xattrs_list_rwsem);
952         mutex_init(&lli->lli_xattrs_enq_lock);
953
954         LASSERT(lli->lli_vfs_inode.i_mode != 0);
955         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
956                 mutex_init(&lli->lli_readdir_mutex);
957                 lli->lli_opendir_key = NULL;
958                 lli->lli_sai = NULL;
959                 lli->lli_def_acl = NULL;
960                 spin_lock_init(&lli->lli_sa_lock);
961                 lli->lli_opendir_pid = 0;
962         } else {
963                 sema_init(&lli->lli_size_sem, 1);
964                 lli->lli_size_sem_owner = NULL;
965                 lli->lli_symlink_name = NULL;
966                 init_rwsem(&lli->lli_trunc_sem);
967                 mutex_init(&lli->lli_write_mutex);
968                 init_rwsem(&lli->lli_glimpse_sem);
969                 lli->lli_glimpse_time = 0;
970                 CFS_INIT_LIST_HEAD(&lli->lli_agl_list);
971                 lli->lli_agl_index = 0;
972                 lli->lli_async_rc = 0;
973                 lli->lli_volatile = false;
974         }
975         mutex_init(&lli->lli_layout_mutex);
976 }
977
978 static inline int ll_bdi_register(struct backing_dev_info *bdi)
979 {
980         static atomic_t ll_bdi_num = ATOMIC_INIT(0);
981
982         bdi->name = "lustre";
983         return bdi_register(bdi, NULL, "lustre-%d",
984                             atomic_inc_return(&ll_bdi_num));
985 }
986
987 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
988 {
989         struct lustre_profile *lprof = NULL;
990         struct lustre_sb_info *lsi = s2lsi(sb);
991         struct ll_sb_info *sbi;
992         char  *dt = NULL, *md = NULL;
993         char  *profilenm = get_profile_name(sb);
994         struct config_llog_instance *cfg;
995         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
996         const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
997         int    err;
998         ENTRY;
999
1000         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
1001
1002         OBD_ALLOC_PTR(cfg);
1003         if (cfg == NULL)
1004                 RETURN(-ENOMEM);
1005
1006         try_module_get(THIS_MODULE);
1007
1008         /* client additional sb info */
1009         lsi->lsi_llsbi = sbi = ll_init_sbi();
1010         if (!sbi) {
1011                 module_put(THIS_MODULE);
1012                 OBD_FREE_PTR(cfg);
1013                 RETURN(-ENOMEM);
1014         }
1015
1016         err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
1017         if (err)
1018                 GOTO(out_free, err);
1019
1020         err = bdi_init(&lsi->lsi_bdi);
1021         if (err)
1022                 GOTO(out_free, err);
1023         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
1024         lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
1025         err = ll_bdi_register(&lsi->lsi_bdi);
1026         if (err)
1027                 GOTO(out_free, err);
1028
1029         sb->s_bdi = &lsi->lsi_bdi;
1030 #ifndef HAVE_DCACHE_LOCK
1031         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
1032         sb->s_d_op = &ll_d_ops;
1033 #endif
1034
1035         /* Generate a string unique to this super, in case some joker tries
1036            to mount the same fs at two mount points.
1037            Use the address of the super itself.*/
1038         cfg->cfg_instance = sb;
1039         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
1040         cfg->cfg_callback = class_config_llog_handler;
1041         /* set up client obds */
1042         err = lustre_process_log(sb, profilenm, cfg);
1043         if (err < 0) {
1044                 CERROR("Unable to process log: %d\n", err);
1045                 GOTO(out_free, err);
1046         }
1047
1048         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1049         lprof = class_get_profile(profilenm);
1050         if (lprof == NULL) {
1051                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1052                                    " read from the MGS.  Does that filesystem "
1053                                    "exist?\n", profilenm);
1054                 GOTO(out_free, err = -EINVAL);
1055         }
1056         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1057                lprof->lp_md, lprof->lp_dt);
1058
1059         OBD_ALLOC(dt, strlen(lprof->lp_dt) + instlen + 2);
1060         if (!dt)
1061                 GOTO(out_free, err = -ENOMEM);
1062         sprintf(dt, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
1063
1064         OBD_ALLOC(md, strlen(lprof->lp_md) + instlen + 2);
1065         if (!md)
1066                 GOTO(out_free, err = -ENOMEM);
1067         sprintf(md, "%s-%p", lprof->lp_md, cfg->cfg_instance);
1068
1069         /* connections, registrations, sb setup */
1070         err = client_common_fill_super(sb, md, dt, mnt);
1071
1072 out_free:
1073         if (md)
1074                 OBD_FREE(md, strlen(lprof->lp_md) + instlen + 2);
1075         if (dt)
1076                 OBD_FREE(dt, strlen(lprof->lp_dt) + instlen + 2);
1077         if (err)
1078                 ll_put_super(sb);
1079         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1080                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1081
1082         OBD_FREE_PTR(cfg);
1083         RETURN(err);
1084 } /* ll_fill_super */
1085
1086
1087 void lu_context_keys_dump(void);
1088
1089 void ll_put_super(struct super_block *sb)
1090 {
1091         struct config_llog_instance cfg, params_cfg;
1092         struct obd_device *obd;
1093         struct lustre_sb_info *lsi = s2lsi(sb);
1094         struct ll_sb_info *sbi = ll_s2sbi(sb);
1095         char *profilenm = get_profile_name(sb);
1096         int ccc_count, next, force = 1, rc = 0;
1097         ENTRY;
1098
1099         CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1100
1101         ll_print_capa_stat(sbi);
1102
1103         cfg.cfg_instance = sb;
1104         lustre_end_log(sb, profilenm, &cfg);
1105
1106         params_cfg.cfg_instance = sb;
1107         lustre_end_log(sb, PARAMS_FILENAME, &params_cfg);
1108
1109         if (sbi->ll_md_exp) {
1110                 obd = class_exp2obd(sbi->ll_md_exp);
1111                 if (obd)
1112                         force = obd->obd_force;
1113         }
1114
1115         /* Wait for unstable pages to be committed to stable storage */
1116         if (force == 0) {
1117                 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
1118                 rc = l_wait_event(sbi->ll_cache.ccc_unstable_waitq,
1119                         cfs_atomic_read(&sbi->ll_cache.ccc_unstable_nr) == 0,
1120                         &lwi);
1121         }
1122
1123         ccc_count = cfs_atomic_read(&sbi->ll_cache.ccc_unstable_nr);
1124         if (force == 0 && rc != -EINTR)
1125                 LASSERTF(ccc_count == 0, "count: %i\n", ccc_count);
1126
1127
1128         /* We need to set force before the lov_disconnect in
1129            lustre_common_put_super, since l_d cleans up osc's as well. */
1130         if (force) {
1131                 next = 0;
1132                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1133                                                      &next)) != NULL) {
1134                         obd->obd_force = force;
1135                 }
1136         }
1137
1138         if (sbi->ll_lcq) {
1139                 /* Only if client_common_fill_super succeeded */
1140                 client_common_put_super(sb);
1141         }
1142
1143         next = 0;
1144         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1145                 class_manual_cleanup(obd);
1146         }
1147
1148         if (sbi->ll_flags & LL_SBI_VERBOSE)
1149                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1150
1151         if (profilenm)
1152                 class_del_profile(profilenm);
1153
1154         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1155                 bdi_destroy(&lsi->lsi_bdi);
1156                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1157         }
1158
1159         ll_free_sbi(sb);
1160         lsi->lsi_llsbi = NULL;
1161
1162         lustre_common_put_super(sb);
1163
1164         cl_env_cache_purge(~0);
1165
1166         module_put(THIS_MODULE);
1167
1168         EXIT;
1169 } /* client_put_super */
1170
1171 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1172 {
1173         struct inode *inode = NULL;
1174
1175         /* NOTE: we depend on atomic igrab() -bzzz */
1176         lock_res_and_lock(lock);
1177         if (lock->l_resource->lr_lvb_inode) {
1178                 struct ll_inode_info * lli;
1179                 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1180                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1181                         inode = igrab(lock->l_resource->lr_lvb_inode);
1182                 } else {
1183                         inode = lock->l_resource->lr_lvb_inode;
1184                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1185                                          D_WARNING, lock, "lr_lvb_inode %p is "
1186                                          "bogus: magic %08x",
1187                                          lock->l_resource->lr_lvb_inode,
1188                                          lli->lli_inode_magic);
1189                         inode = NULL;
1190                 }
1191         }
1192         unlock_res_and_lock(lock);
1193         return inode;
1194 }
1195
1196 struct inode *ll_inode_from_lock(struct ldlm_lock *lock)
1197 {
1198         struct inode *inode = NULL;
1199         /* NOTE: we depend on atomic igrab() -bzzz */
1200         lock_res_and_lock(lock);
1201         if (lock->l_ast_data) {
1202                 struct ll_inode_info *lli = ll_i2info(lock->l_ast_data);
1203                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1204                         inode = igrab(lock->l_ast_data);
1205                 } else {
1206                         inode = lock->l_ast_data;
1207                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1208                                          D_WARNING, lock, "l_ast_data %p is "
1209                                          "bogus: magic %08x", lock->l_ast_data,
1210                                          lli->lli_inode_magic);
1211                         inode = NULL;
1212                 }
1213         }
1214         unlock_res_and_lock(lock);
1215         return inode;
1216 }
1217
1218 void ll_clear_inode(struct inode *inode)
1219 {
1220         struct ll_inode_info *lli = ll_i2info(inode);
1221         struct ll_sb_info *sbi = ll_i2sbi(inode);
1222         ENTRY;
1223
1224         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1225                PFID(ll_inode2fid(inode)), inode);
1226
1227         if (S_ISDIR(inode->i_mode)) {
1228                 /* these should have been cleared in ll_file_release */
1229                 LASSERT(lli->lli_opendir_key == NULL);
1230                 LASSERT(lli->lli_sai == NULL);
1231                 LASSERT(lli->lli_opendir_pid == 0);
1232         }
1233
1234         spin_lock(&lli->lli_lock);
1235         ll_i2info(inode)->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
1236         spin_unlock(&lli->lli_lock);
1237         md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1238
1239         LASSERT(!lli->lli_open_fd_write_count);
1240         LASSERT(!lli->lli_open_fd_read_count);
1241         LASSERT(!lli->lli_open_fd_exec_count);
1242
1243         if (lli->lli_mds_write_och)
1244                 ll_md_real_close(inode, FMODE_WRITE);
1245         if (lli->lli_mds_exec_och)
1246                 ll_md_real_close(inode, FMODE_EXEC);
1247         if (lli->lli_mds_read_och)
1248                 ll_md_real_close(inode, FMODE_READ);
1249
1250         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1251                 OBD_FREE(lli->lli_symlink_name,
1252                          strlen(lli->lli_symlink_name) + 1);
1253                 lli->lli_symlink_name = NULL;
1254         }
1255
1256         ll_xattr_cache_destroy(inode);
1257
1258         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1259                 LASSERT(lli->lli_posix_acl == NULL);
1260                 if (lli->lli_remote_perms) {
1261                         free_rmtperm_hash(lli->lli_remote_perms);
1262                         lli->lli_remote_perms = NULL;
1263                 }
1264         }
1265 #ifdef CONFIG_FS_POSIX_ACL
1266         else if (lli->lli_posix_acl) {
1267                 LASSERT(cfs_atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1268                 LASSERT(lli->lli_remote_perms == NULL);
1269                 posix_acl_release(lli->lli_posix_acl);
1270                 lli->lli_posix_acl = NULL;
1271         }
1272 #endif
1273         lli->lli_inode_magic = LLI_INODE_DEAD;
1274
1275         ll_clear_inode_capas(inode);
1276         if (!S_ISDIR(inode->i_mode))
1277                 LASSERT(cfs_list_empty(&lli->lli_agl_list));
1278
1279         /*
1280          * XXX This has to be done before lsm is freed below, because
1281          * cl_object still uses inode lsm.
1282          */
1283         cl_inode_fini(inode);
1284         lli->lli_has_smd = false;
1285
1286         EXIT;
1287 }
1288
1289 int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data,
1290                   struct md_open_data **mod)
1291 {
1292         struct lustre_md md;
1293         struct inode *inode = dentry->d_inode;
1294         struct ll_sb_info *sbi = ll_i2sbi(inode);
1295         struct ptlrpc_request *request = NULL;
1296         int rc, ia_valid;
1297         ENTRY;
1298
1299         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1300                                      LUSTRE_OPC_ANY, NULL);
1301         if (IS_ERR(op_data))
1302                 RETURN(PTR_ERR(op_data));
1303
1304         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, NULL, 0,
1305                         &request, mod);
1306         if (rc) {
1307                 ptlrpc_req_finished(request);
1308                 if (rc == -ENOENT) {
1309                         clear_nlink(inode);
1310                         /* Unlinked special device node? Or just a race?
1311                          * Pretend we done everything. */
1312                         if (!S_ISREG(inode->i_mode) &&
1313                             !S_ISDIR(inode->i_mode)) {
1314                                 ia_valid = op_data->op_attr.ia_valid;
1315                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1316                                 rc = simple_setattr(dentry, &op_data->op_attr);
1317                                 op_data->op_attr.ia_valid = ia_valid;
1318                         }
1319                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1320                         CERROR("md_setattr fails: rc = %d\n", rc);
1321                 }
1322                 RETURN(rc);
1323         }
1324
1325         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1326                               sbi->ll_md_exp, &md);
1327         if (rc) {
1328                 ptlrpc_req_finished(request);
1329                 RETURN(rc);
1330         }
1331
1332         ia_valid = op_data->op_attr.ia_valid;
1333         /* inode size will be in ll_setattr_ost, can't do it now since dirty
1334          * cache is not cleared yet. */
1335         op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1336         rc = simple_setattr(dentry, &op_data->op_attr);
1337         op_data->op_attr.ia_valid = ia_valid;
1338
1339         /* Extract epoch data if obtained. */
1340         op_data->op_handle = md.body->handle;
1341         op_data->op_ioepoch = md.body->ioepoch;
1342
1343         ll_update_inode(inode, &md);
1344         ptlrpc_req_finished(request);
1345
1346         RETURN(rc);
1347 }
1348
1349 /* Close IO epoch and send Size-on-MDS attribute update. */
1350 static int ll_setattr_done_writing(struct inode *inode,
1351                                    struct md_op_data *op_data,
1352                                    struct md_open_data *mod)
1353 {
1354         struct ll_inode_info *lli = ll_i2info(inode);
1355         int rc = 0;
1356         ENTRY;
1357
1358         LASSERT(op_data != NULL);
1359         if (!S_ISREG(inode->i_mode))
1360                 RETURN(0);
1361
1362         CDEBUG(D_INODE, "Epoch "LPU64" closed on "DFID" for truncate\n",
1363                op_data->op_ioepoch, PFID(&lli->lli_fid));
1364
1365         op_data->op_flags = MF_EPOCH_CLOSE;
1366         ll_done_writing_attr(inode, op_data);
1367         ll_pack_inode2opdata(inode, op_data, NULL);
1368
1369         rc = md_done_writing(ll_i2sbi(inode)->ll_md_exp, op_data, mod);
1370         if (rc == -EAGAIN) {
1371                 /* MDS has instructed us to obtain Size-on-MDS attribute
1372                  * from OSTs and send setattr to back to MDS. */
1373                 rc = ll_som_update(inode, op_data);
1374         } else if (rc) {
1375                 CERROR("%s: inode "DFID" mdc truncate failed: rc = %d\n",
1376                        ll_i2sbi(inode)->ll_md_exp->exp_obd->obd_name,
1377                        PFID(ll_inode2fid(inode)), rc);
1378         }
1379         RETURN(rc);
1380 }
1381
1382 static int ll_setattr_ost(struct inode *inode, struct iattr *attr)
1383 {
1384         struct obd_capa *capa;
1385         int rc;
1386
1387         if (attr->ia_valid & ATTR_SIZE)
1388                 capa = ll_osscapa_get(inode, CAPA_OPC_OSS_TRUNC);
1389         else
1390                 capa = ll_mdscapa_get(inode);
1391
1392         rc = cl_setattr_ost(inode, attr, capa);
1393
1394         if (attr->ia_valid & ATTR_SIZE)
1395                 ll_truncate_free_capa(capa);
1396         else
1397                 capa_put(capa);
1398
1399         return rc;
1400 }
1401
1402 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1403  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1404  * keep these values until such a time that objects are allocated for it.
1405  * We do the MDS operations first, as it is checking permissions for us.
1406  * We don't to the MDS RPC if there is nothing that we want to store there,
1407  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1408  * going to do an RPC anyways.
1409  *
1410  * If we are doing a truncate, we will send the mtime and ctime updates
1411  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1412  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1413  * at the same time.
1414  *
1415  * In case of HSMimport, we only set attr on MDS.
1416  */
1417 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr, bool hsm_import)
1418 {
1419         struct inode *inode = dentry->d_inode;
1420         struct ll_inode_info *lli = ll_i2info(inode);
1421         struct md_op_data *op_data = NULL;
1422         struct md_open_data *mod = NULL;
1423         bool file_is_released = false;
1424         int rc = 0, rc1 = 0;
1425         ENTRY;
1426
1427         CDEBUG(D_VFSTRACE, "%s: setattr inode "DFID"(%p) from %llu to %llu, "
1428                "valid %x, hsm_import %d\n",
1429                ll_get_fsname(inode->i_sb, NULL, 0), PFID(&lli->lli_fid),
1430                inode, i_size_read(inode), attr->ia_size, attr->ia_valid,
1431                hsm_import);
1432
1433         if (attr->ia_valid & ATTR_SIZE) {
1434                 /* Check new size against VFS/VM file size limit and rlimit */
1435                 rc = inode_newsize_ok(inode, attr->ia_size);
1436                 if (rc)
1437                         RETURN(rc);
1438
1439                 /* The maximum Lustre file size is variable, based on the
1440                  * OST maximum object size and number of stripes.  This
1441                  * needs another check in addition to the VFS check above. */
1442                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1443                         CDEBUG(D_INODE,"file "DFID" too large %llu > "LPU64"\n",
1444                                PFID(&lli->lli_fid), attr->ia_size,
1445                                ll_file_maxbytes(inode));
1446                         RETURN(-EFBIG);
1447                 }
1448
1449                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1450         }
1451
1452         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1453         if (attr->ia_valid & TIMES_SET_FLAGS) {
1454                 if (current_fsuid() != inode->i_uid &&
1455                     !cfs_capable(CFS_CAP_FOWNER))
1456                         RETURN(-EPERM);
1457         }
1458
1459         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1460         if (attr->ia_valid & ATTR_CTIME) {
1461                 attr->ia_ctime = CFS_CURRENT_TIME;
1462                 attr->ia_valid |= ATTR_CTIME_SET;
1463         }
1464         if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1465             (attr->ia_valid & ATTR_ATIME)) {
1466                 attr->ia_atime = CFS_CURRENT_TIME;
1467                 attr->ia_valid |= ATTR_ATIME_SET;
1468         }
1469         if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1470             (attr->ia_valid & ATTR_MTIME)) {
1471                 attr->ia_mtime = CFS_CURRENT_TIME;
1472                 attr->ia_valid |= ATTR_MTIME_SET;
1473         }
1474
1475         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1476                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %lu\n",
1477                        LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1478                        cfs_time_current_sec());
1479
1480         /* We always do an MDS RPC, even if we're only changing the size;
1481          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1482
1483         OBD_ALLOC_PTR(op_data);
1484         if (op_data == NULL)
1485                 RETURN(-ENOMEM);
1486
1487         if (!S_ISDIR(inode->i_mode)) {
1488                 if (attr->ia_valid & ATTR_SIZE)
1489                         inode_dio_write_done(inode);
1490                 mutex_unlock(&inode->i_mutex);
1491                 down_write(&lli->lli_trunc_sem);
1492         }
1493
1494         /* truncate on a released file must failed with -ENODATA,
1495          * so size must not be set on MDS for released file
1496          * but other attributes must be set
1497          */
1498         if (S_ISREG(inode->i_mode)) {
1499                 struct lov_stripe_md *lsm;
1500                 __u32 gen;
1501
1502                 ll_layout_refresh(inode, &gen);
1503                 lsm = ccc_inode_lsm_get(inode);
1504                 if (lsm && lsm->lsm_pattern & LOV_PATTERN_F_RELEASED)
1505                         file_is_released = true;
1506                 ccc_inode_lsm_put(inode, lsm);
1507
1508                 if (!hsm_import && attr->ia_valid & ATTR_SIZE) {
1509                         if (file_is_released) {
1510                                 rc = ll_layout_restore(inode, 0, attr->ia_size);
1511                                 if (rc < 0)
1512                                         GOTO(out, rc);
1513
1514                                 file_is_released = false;
1515                                 ll_layout_refresh(inode, &gen);
1516                         }
1517
1518                         /* If we are changing file size, file content is
1519                          * modified, flag it. */
1520                         attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1521                         spin_lock(&lli->lli_lock);
1522                         lli->lli_flags |= LLIF_DATA_MODIFIED;
1523                         spin_unlock(&lli->lli_lock);
1524                         op_data->op_bias |= MDS_DATA_MODIFIED;
1525                 }
1526         }
1527
1528         memcpy(&op_data->op_attr, attr, sizeof(*attr));
1529
1530         /* Open epoch for truncate. */
1531         if (exp_connect_som(ll_i2mdexp(inode)) && !hsm_import &&
1532             (attr->ia_valid & (ATTR_SIZE | ATTR_MTIME | ATTR_MTIME_SET)))
1533                 op_data->op_flags = MF_EPOCH_OPEN;
1534
1535         rc = ll_md_setattr(dentry, op_data, &mod);
1536         if (rc)
1537                 GOTO(out, rc);
1538
1539         /* RPC to MDT is sent, cancel data modification flag */
1540         if (rc == 0 && (op_data->op_bias & MDS_DATA_MODIFIED)) {
1541                 spin_lock(&lli->lli_lock);
1542                 lli->lli_flags &= ~LLIF_DATA_MODIFIED;
1543                 spin_unlock(&lli->lli_lock);
1544         }
1545
1546         ll_ioepoch_open(lli, op_data->op_ioepoch);
1547         if (!S_ISREG(inode->i_mode) || file_is_released)
1548                 GOTO(out, rc = 0);
1549
1550         if (attr->ia_valid & (ATTR_SIZE |
1551                               ATTR_ATIME | ATTR_ATIME_SET |
1552                               ATTR_MTIME | ATTR_MTIME_SET)) {
1553                 /* For truncate and utimes sending attributes to OSTs, setting
1554                  * mtime/atime to the past will be performed under PW [0:EOF]
1555                  * extent lock (new_size:EOF for truncate).  It may seem
1556                  * excessive to send mtime/atime updates to OSTs when not
1557                  * setting times to past, but it is necessary due to possible
1558                  * time de-synchronization between MDT inode and OST objects */
1559                 rc = ll_setattr_ost(inode, attr);
1560         }
1561         EXIT;
1562 out:
1563         if (op_data) {
1564                 if (op_data->op_ioepoch) {
1565                         rc1 = ll_setattr_done_writing(inode, op_data, mod);
1566                         if (!rc)
1567                                 rc = rc1;
1568                 }
1569                 ll_finish_md_op_data(op_data);
1570         }
1571         if (!S_ISDIR(inode->i_mode)) {
1572                 up_write(&lli->lli_trunc_sem);
1573                 mutex_lock(&inode->i_mutex);
1574                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1575                         inode_dio_wait(inode);
1576         }
1577
1578         ll_stats_ops_tally(ll_i2sbi(inode), (attr->ia_valid & ATTR_SIZE) ?
1579                         LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1580
1581         return rc;
1582 }
1583
1584 int ll_setattr(struct dentry *de, struct iattr *attr)
1585 {
1586         int mode = de->d_inode->i_mode;
1587
1588         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1589                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1590                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1591
1592         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1593                                (ATTR_SIZE|ATTR_MODE)) &&
1594             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1595              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1596               !(attr->ia_mode & S_ISGID))))
1597                 attr->ia_valid |= ATTR_FORCE;
1598
1599         if ((mode & S_ISUID) &&
1600             !(attr->ia_mode & S_ISUID) &&
1601             !(attr->ia_valid & ATTR_KILL_SUID))
1602                 attr->ia_valid |= ATTR_KILL_SUID;
1603
1604         if (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1605             !(attr->ia_mode & S_ISGID) &&
1606             !(attr->ia_valid & ATTR_KILL_SGID))
1607                 attr->ia_valid |= ATTR_KILL_SGID;
1608
1609         return ll_setattr_raw(de, attr, false);
1610 }
1611
1612 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1613                        __u64 max_age, __u32 flags)
1614 {
1615         struct ll_sb_info *sbi = ll_s2sbi(sb);
1616         struct obd_statfs obd_osfs;
1617         int rc;
1618         ENTRY;
1619
1620         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1621         if (rc) {
1622                 CERROR("md_statfs fails: rc = %d\n", rc);
1623                 RETURN(rc);
1624         }
1625
1626         osfs->os_type = sb->s_magic;
1627
1628         CDEBUG(D_SUPER, "MDC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1629                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,osfs->os_files);
1630
1631         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1632                 flags |= OBD_STATFS_NODELAY;
1633
1634         rc = obd_statfs_rqset(sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1635         if (rc) {
1636                 CERROR("obd_statfs fails: rc = %d\n", rc);
1637                 RETURN(rc);
1638         }
1639
1640         CDEBUG(D_SUPER, "OSC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1641                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1642                obd_osfs.os_files);
1643
1644         osfs->os_bsize = obd_osfs.os_bsize;
1645         osfs->os_blocks = obd_osfs.os_blocks;
1646         osfs->os_bfree = obd_osfs.os_bfree;
1647         osfs->os_bavail = obd_osfs.os_bavail;
1648
1649         /* If we don't have as many objects free on the OST as inodes
1650          * on the MDS, we reduce the total number of inodes to
1651          * compensate, so that the "inodes in use" number is correct.
1652          */
1653         if (obd_osfs.os_ffree < osfs->os_ffree) {
1654                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1655                         obd_osfs.os_ffree;
1656                 osfs->os_ffree = obd_osfs.os_ffree;
1657         }
1658
1659         RETURN(rc);
1660 }
1661 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1662 {
1663         struct super_block *sb = de->d_sb;
1664         struct obd_statfs osfs;
1665         __u64 fsid = huge_encode_dev(sb->s_dev);
1666         int rc;
1667
1668         CDEBUG(D_VFSTRACE, "VFS Op: at "LPU64" jiffies\n", get_jiffies_64());
1669         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1670
1671         /* Some amount of caching on the client is allowed */
1672         rc = ll_statfs_internal(sb, &osfs,
1673                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1674                                 0);
1675         if (rc)
1676                 return rc;
1677
1678         statfs_unpack(sfs, &osfs);
1679
1680         /* We need to downshift for all 32-bit kernels, because we can't
1681          * tell if the kernel is being called via sys_statfs64() or not.
1682          * Stop before overflowing f_bsize - in which case it is better
1683          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1684         if (sizeof(long) < 8) {
1685                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1686                         sfs->f_bsize <<= 1;
1687
1688                         osfs.os_blocks >>= 1;
1689                         osfs.os_bfree >>= 1;
1690                         osfs.os_bavail >>= 1;
1691                 }
1692         }
1693
1694         sfs->f_blocks = osfs.os_blocks;
1695         sfs->f_bfree = osfs.os_bfree;
1696         sfs->f_bavail = osfs.os_bavail;
1697         sfs->f_fsid.val[0] = (__u32)fsid;
1698         sfs->f_fsid.val[1] = (__u32)(fsid >> 32);
1699         return 0;
1700 }
1701
1702 void ll_inode_size_lock(struct inode *inode)
1703 {
1704         struct ll_inode_info *lli;
1705
1706         LASSERT(!S_ISDIR(inode->i_mode));
1707
1708         lli = ll_i2info(inode);
1709         LASSERT(lli->lli_size_sem_owner != current);
1710         down(&lli->lli_size_sem);
1711         LASSERT(lli->lli_size_sem_owner == NULL);
1712         lli->lli_size_sem_owner = current;
1713 }
1714
1715 void ll_inode_size_unlock(struct inode *inode)
1716 {
1717         struct ll_inode_info *lli;
1718
1719         lli = ll_i2info(inode);
1720         LASSERT(lli->lli_size_sem_owner == current);
1721         lli->lli_size_sem_owner = NULL;
1722         up(&lli->lli_size_sem);
1723 }
1724
1725 void ll_update_inode(struct inode *inode, struct lustre_md *md)
1726 {
1727         struct ll_inode_info *lli = ll_i2info(inode);
1728         struct mdt_body *body = md->body;
1729         struct lov_stripe_md *lsm = md->lsm;
1730         struct ll_sb_info *sbi = ll_i2sbi(inode);
1731
1732         LASSERT ((lsm != NULL) == ((body->valid & OBD_MD_FLEASIZE) != 0));
1733         if (lsm != NULL) {
1734                 if (!lli->lli_has_smd &&
1735                     !(sbi->ll_flags & LL_SBI_LAYOUT_LOCK))
1736                         cl_file_inode_init(inode, md);
1737
1738                 lli->lli_maxbytes = lsm->lsm_maxbytes;
1739                 if (lli->lli_maxbytes > MAX_LFS_FILESIZE)
1740                         lli->lli_maxbytes = MAX_LFS_FILESIZE;
1741         }
1742
1743         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1744                 if (body->valid & OBD_MD_FLRMTPERM)
1745                         ll_update_remote_perm(inode, md->remote_perm);
1746         }
1747 #ifdef CONFIG_FS_POSIX_ACL
1748         else if (body->valid & OBD_MD_FLACL) {
1749                 spin_lock(&lli->lli_lock);
1750                 if (lli->lli_posix_acl)
1751                         posix_acl_release(lli->lli_posix_acl);
1752                 lli->lli_posix_acl = md->posix_acl;
1753                 spin_unlock(&lli->lli_lock);
1754         }
1755 #endif
1756         inode->i_ino = cl_fid_build_ino(&body->fid1,
1757                                         sbi->ll_flags & LL_SBI_32BIT_API);
1758         inode->i_generation = cl_fid_build_gen(&body->fid1);
1759
1760         if (body->valid & OBD_MD_FLATIME) {
1761                 if (body->atime > LTIME_S(inode->i_atime))
1762                         LTIME_S(inode->i_atime) = body->atime;
1763                 lli->lli_lvb.lvb_atime = body->atime;
1764         }
1765         if (body->valid & OBD_MD_FLMTIME) {
1766                 if (body->mtime > LTIME_S(inode->i_mtime)) {
1767                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
1768                                "to "LPU64"\n", inode->i_ino,
1769                                LTIME_S(inode->i_mtime), body->mtime);
1770                         LTIME_S(inode->i_mtime) = body->mtime;
1771                 }
1772                 lli->lli_lvb.lvb_mtime = body->mtime;
1773         }
1774         if (body->valid & OBD_MD_FLCTIME) {
1775                 if (body->ctime > LTIME_S(inode->i_ctime))
1776                         LTIME_S(inode->i_ctime) = body->ctime;
1777                 lli->lli_lvb.lvb_ctime = body->ctime;
1778         }
1779         if (body->valid & OBD_MD_FLMODE)
1780                 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
1781         if (body->valid & OBD_MD_FLTYPE)
1782                 inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
1783         LASSERT(inode->i_mode != 0);
1784         if (S_ISREG(inode->i_mode)) {
1785                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1, LL_MAX_BLKSIZE_BITS);
1786         } else {
1787                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1788         }
1789         if (body->valid & OBD_MD_FLUID)
1790                 inode->i_uid = body->uid;
1791         if (body->valid & OBD_MD_FLGID)
1792                 inode->i_gid = body->gid;
1793         if (body->valid & OBD_MD_FLFLAGS)
1794                 inode->i_flags = ll_ext_to_inode_flags(body->flags);
1795         if (body->valid & OBD_MD_FLNLINK)
1796                 set_nlink(inode, body->nlink);
1797         if (body->valid & OBD_MD_FLRDEV)
1798                 inode->i_rdev = old_decode_dev(body->rdev);
1799
1800         if (body->valid & OBD_MD_FLID) {
1801                 /* FID shouldn't be changed! */
1802                 if (fid_is_sane(&lli->lli_fid)) {
1803                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->fid1),
1804                                  "Trying to change FID "DFID
1805                                  " to the "DFID", inode "DFID"(%p)\n",
1806                                  PFID(&lli->lli_fid), PFID(&body->fid1),
1807                                  PFID(ll_inode2fid(inode)), inode);
1808                 } else
1809                         lli->lli_fid = body->fid1;
1810         }
1811
1812         LASSERT(fid_seq(&lli->lli_fid) != 0);
1813
1814         if (body->valid & OBD_MD_FLSIZE) {
1815                 if (exp_connect_som(ll_i2mdexp(inode)) &&
1816                     S_ISREG(inode->i_mode)) {
1817                         struct lustre_handle lockh;
1818                         ldlm_mode_t mode;
1819
1820                         /* As it is possible a blocking ast has been processed
1821                          * by this time, we need to check there is an UPDATE
1822                          * lock on the client and set LLIF_MDS_SIZE_LOCK holding
1823                          * it. */
1824                         mode = ll_take_md_lock(inode, MDS_INODELOCK_UPDATE,
1825                                                &lockh, LDLM_FL_CBPENDING,
1826                                                LCK_CR | LCK_CW |
1827                                                LCK_PR | LCK_PW);
1828                         if (mode) {
1829                                 if (lli->lli_flags & (LLIF_DONE_WRITING |
1830                                                       LLIF_EPOCH_PENDING |
1831                                                       LLIF_SOM_DIRTY)) {
1832                                         CERROR("%s: inode "DFID" flags %u still"
1833                                                " has size authority! do not "
1834                                                "trust the size from MDS\n",
1835                                                sbi->ll_md_exp->exp_obd->obd_name,
1836                                                PFID(ll_inode2fid(inode)),
1837                                                lli->lli_flags);
1838                                 } else {
1839                                         /* Use old size assignment to avoid
1840                                          * deadlock bz14138 & bz14326 */
1841                                         i_size_write(inode, body->size);
1842                                         spin_lock(&lli->lli_lock);
1843                                         lli->lli_flags |= LLIF_MDS_SIZE_LOCK;
1844                                         spin_unlock(&lli->lli_lock);
1845                                 }
1846                                 ldlm_lock_decref(&lockh, mode);
1847                         }
1848                 } else {
1849                         /* Use old size assignment to avoid
1850                          * deadlock bz14138 & bz14326 */
1851                         i_size_write(inode, body->size);
1852
1853                         CDEBUG(D_VFSTRACE,
1854                                "inode="DFID", updating i_size %llu\n",
1855                                PFID(ll_inode2fid(inode)),
1856                                (unsigned long long)body->size);
1857                 }
1858
1859                 if (body->valid & OBD_MD_FLBLOCKS)
1860                         inode->i_blocks = body->blocks;
1861         }
1862
1863         if (body->valid & OBD_MD_FLMDSCAPA) {
1864                 LASSERT(md->mds_capa);
1865                 ll_add_capa(inode, md->mds_capa);
1866         }
1867         if (body->valid & OBD_MD_FLOSSCAPA) {
1868                 LASSERT(md->oss_capa);
1869                 ll_add_capa(inode, md->oss_capa);
1870         }
1871
1872         if (body->valid & OBD_MD_TSTATE) {
1873                 if (body->t_state & MS_RESTORE)
1874                         lli->lli_flags |= LLIF_FILE_RESTORING;
1875         }
1876 }
1877
1878 void ll_read_inode2(struct inode *inode, void *opaque)
1879 {
1880         struct lustre_md *md = opaque;
1881         struct ll_inode_info *lli = ll_i2info(inode);
1882         ENTRY;
1883
1884         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1885                PFID(&lli->lli_fid), inode);
1886
1887         LASSERT(!lli->lli_has_smd);
1888
1889         /* Core attributes from the MDS first.  This is a new inode, and
1890          * the VFS doesn't zero times in the core inode so we have to do
1891          * it ourselves.  They will be overwritten by either MDS or OST
1892          * attributes - we just need to make sure they aren't newer. */
1893         LTIME_S(inode->i_mtime) = 0;
1894         LTIME_S(inode->i_atime) = 0;
1895         LTIME_S(inode->i_ctime) = 0;
1896         inode->i_rdev = 0;
1897         ll_update_inode(inode, md);
1898
1899         /* OIDEBUG(inode); */
1900
1901         /* initializing backing dev info. */
1902         inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
1903
1904
1905         if (S_ISREG(inode->i_mode)) {
1906                 struct ll_sb_info *sbi = ll_i2sbi(inode);
1907                 inode->i_op = &ll_file_inode_operations;
1908                 inode->i_fop = sbi->ll_fop;
1909                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
1910                 EXIT;
1911         } else if (S_ISDIR(inode->i_mode)) {
1912                 inode->i_op = &ll_dir_inode_operations;
1913                 inode->i_fop = &ll_dir_operations;
1914                 EXIT;
1915         } else if (S_ISLNK(inode->i_mode)) {
1916                 inode->i_op = &ll_fast_symlink_inode_operations;
1917                 EXIT;
1918         } else {
1919                 inode->i_op = &ll_special_inode_operations;
1920
1921                 init_special_inode(inode, inode->i_mode,
1922                                    inode->i_rdev);
1923
1924                 EXIT;
1925         }
1926 }
1927
1928 void ll_delete_inode(struct inode *inode)
1929 {
1930         struct cl_inode_info *lli = cl_i2info(inode);
1931         ENTRY;
1932
1933         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
1934                 /* discard all dirty pages before truncating them, required by
1935                  * osc_extent implementation at LU-1030. */
1936                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF,
1937                                    CL_FSYNC_DISCARD, 1);
1938
1939         truncate_inode_pages(&inode->i_data, 0);
1940
1941         /* Workaround for LU-118 */
1942         if (inode->i_data.nrpages) {
1943                 spin_lock_irq(&inode->i_data.tree_lock);
1944                 spin_unlock_irq(&inode->i_data.tree_lock);
1945                 LASSERTF(inode->i_data.nrpages == 0,
1946                          "inode="DFID"(%p) nrpages=%lu, see "
1947                          "http://jira.whamcloud.com/browse/LU-118\n",
1948                          PFID(ll_inode2fid(inode)), inode,
1949                          inode->i_data.nrpages);
1950         }
1951         /* Workaround end */
1952
1953 #ifdef HAVE_SBOPS_EVICT_INODE
1954         ll_clear_inode(inode);
1955 #endif
1956         clear_inode(inode);
1957
1958         EXIT;
1959 }
1960
1961 int ll_iocontrol(struct inode *inode, struct file *file,
1962                  unsigned int cmd, unsigned long arg)
1963 {
1964         struct ll_sb_info *sbi = ll_i2sbi(inode);
1965         struct ptlrpc_request *req = NULL;
1966         int rc, flags = 0;
1967         ENTRY;
1968
1969         switch(cmd) {
1970         case FSFILT_IOC_GETFLAGS: {
1971                 struct mdt_body *body;
1972                 struct md_op_data *op_data;
1973
1974                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
1975                                              0, 0, LUSTRE_OPC_ANY,
1976                                              NULL);
1977                 if (IS_ERR(op_data))
1978                         RETURN(PTR_ERR(op_data));
1979
1980                 op_data->op_valid = OBD_MD_FLFLAGS;
1981                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
1982                 ll_finish_md_op_data(op_data);
1983                 if (rc) {
1984                         CERROR("%s: failure inode "DFID": rc = %d\n",
1985                                sbi->ll_md_exp->exp_obd->obd_name,
1986                                PFID(ll_inode2fid(inode)), rc);
1987                         RETURN(-abs(rc));
1988                 }
1989
1990                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1991
1992                 flags = body->flags;
1993
1994                 ptlrpc_req_finished(req);
1995
1996                 RETURN(put_user(flags, (int *)arg));
1997         }
1998         case FSFILT_IOC_SETFLAGS: {
1999                 struct lov_stripe_md *lsm;
2000                 struct obd_info oinfo = { { { 0 } } };
2001                 struct md_op_data *op_data;
2002
2003                 if (get_user(flags, (int *)arg))
2004                         RETURN(-EFAULT);
2005
2006                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
2007                                              LUSTRE_OPC_ANY, NULL);
2008                 if (IS_ERR(op_data))
2009                         RETURN(PTR_ERR(op_data));
2010
2011                 ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags = flags;
2012                 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
2013                 rc = md_setattr(sbi->ll_md_exp, op_data,
2014                                 NULL, 0, NULL, 0, &req, NULL);
2015                 ll_finish_md_op_data(op_data);
2016                 ptlrpc_req_finished(req);
2017                 if (rc)
2018                         RETURN(rc);
2019
2020                 inode->i_flags = ll_ext_to_inode_flags(flags);
2021
2022                 lsm = ccc_inode_lsm_get(inode);
2023                 if (!lsm_has_objects(lsm)) {
2024                         ccc_inode_lsm_put(inode, lsm);
2025                         RETURN(0);
2026                 }
2027
2028                 OBDO_ALLOC(oinfo.oi_oa);
2029                 if (!oinfo.oi_oa) {
2030                         ccc_inode_lsm_put(inode, lsm);
2031                         RETURN(-ENOMEM);
2032                 }
2033                 oinfo.oi_md = lsm;
2034                 oinfo.oi_oa->o_oi = lsm->lsm_oi;
2035                 oinfo.oi_oa->o_flags = flags;
2036                 oinfo.oi_oa->o_valid = OBD_MD_FLID | OBD_MD_FLFLAGS |
2037                                        OBD_MD_FLGROUP;
2038                 oinfo.oi_capa = ll_mdscapa_get(inode);
2039                 obdo_set_parent_fid(oinfo.oi_oa, &ll_i2info(inode)->lli_fid);
2040                 rc = obd_setattr_rqset(sbi->ll_dt_exp, &oinfo, NULL);
2041                 capa_put(oinfo.oi_capa);
2042                 OBDO_FREE(oinfo.oi_oa);
2043                 ccc_inode_lsm_put(inode, lsm);
2044
2045                 if (rc && rc != -EPERM && rc != -EACCES)
2046                         CERROR("osc_setattr_async fails: rc = %d\n", rc);
2047
2048                 RETURN(rc);
2049         }
2050         default:
2051                 RETURN(-ENOSYS);
2052         }
2053
2054         RETURN(0);
2055 }
2056
2057 int ll_flush_ctx(struct inode *inode)
2058 {
2059         struct ll_sb_info  *sbi = ll_i2sbi(inode);
2060
2061         CDEBUG(D_SEC, "flush context for user %d\n", current_uid());
2062
2063         obd_set_info_async(NULL, sbi->ll_md_exp,
2064                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2065                            0, NULL, NULL);
2066         obd_set_info_async(NULL, sbi->ll_dt_exp,
2067                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2068                            0, NULL, NULL);
2069         return 0;
2070 }
2071
2072 /* umount -f client means force down, don't save state */
2073 void ll_umount_begin(struct super_block *sb)
2074 {
2075         struct ll_sb_info *sbi = ll_s2sbi(sb);
2076         struct obd_device *obd;
2077         struct obd_ioctl_data *ioc_data;
2078         ENTRY;
2079
2080         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2081                sb->s_count, atomic_read(&sb->s_active));
2082
2083         obd = class_exp2obd(sbi->ll_md_exp);
2084         if (obd == NULL) {
2085                 CERROR("Invalid MDC connection handle "LPX64"\n",
2086                        sbi->ll_md_exp->exp_handle.h_cookie);
2087                 EXIT;
2088                 return;
2089         }
2090         obd->obd_force = 1;
2091
2092         obd = class_exp2obd(sbi->ll_dt_exp);
2093         if (obd == NULL) {
2094                 CERROR("Invalid LOV connection handle "LPX64"\n",
2095                        sbi->ll_dt_exp->exp_handle.h_cookie);
2096                 EXIT;
2097                 return;
2098         }
2099         obd->obd_force = 1;
2100
2101         OBD_ALLOC_PTR(ioc_data);
2102         if (ioc_data) {
2103                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2104                               sizeof *ioc_data, ioc_data, NULL);
2105
2106                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2107                               sizeof *ioc_data, ioc_data, NULL);
2108
2109                 OBD_FREE_PTR(ioc_data);
2110         }
2111
2112         /* Really, we'd like to wait until there are no requests outstanding,
2113          * and then continue.  For now, we just invalidate the requests,
2114          * schedule() and sleep one second if needed, and hope.
2115          */
2116         schedule();
2117         EXIT;
2118 }
2119
2120 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2121 {
2122         struct ll_sb_info *sbi = ll_s2sbi(sb);
2123         char *profilenm = get_profile_name(sb);
2124         int err;
2125         __u32 read_only;
2126
2127         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2128                 read_only = *flags & MS_RDONLY;
2129                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2130                                          sizeof(KEY_READ_ONLY),
2131                                          KEY_READ_ONLY, sizeof(read_only),
2132                                          &read_only, NULL);
2133                 if (err) {
2134                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2135                                       profilenm, read_only ?
2136                                       "read-only" : "read-write", err);
2137                         return err;
2138                 }
2139
2140                 if (read_only)
2141                         sb->s_flags |= MS_RDONLY;
2142                 else
2143                         sb->s_flags &= ~MS_RDONLY;
2144
2145                 if (sbi->ll_flags & LL_SBI_VERBOSE)
2146                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2147                                       read_only ?  "read-only" : "read-write");
2148         }
2149         return 0;
2150 }
2151
2152 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2153                   struct super_block *sb, struct lookup_intent *it)
2154 {
2155         struct ll_sb_info *sbi = NULL;
2156         struct lustre_md md;
2157         int rc;
2158         ENTRY;
2159
2160         LASSERT(*inode || sb);
2161         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2162         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2163                               sbi->ll_md_exp, &md);
2164         if (rc)
2165                 RETURN(rc);
2166
2167         if (*inode) {
2168                 ll_update_inode(*inode, &md);
2169         } else {
2170                 LASSERT(sb != NULL);
2171
2172                 /*
2173                  * At this point server returns to client's same fid as client
2174                  * generated for creating. So using ->fid1 is okay here.
2175                  */
2176                 LASSERT(fid_is_sane(&md.body->fid1));
2177
2178                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->fid1,
2179                                              sbi->ll_flags & LL_SBI_32BIT_API),
2180                                  &md);
2181                 if (*inode == NULL || IS_ERR(*inode)) {
2182 #ifdef CONFIG_FS_POSIX_ACL
2183                         if (md.posix_acl) {
2184                                 posix_acl_release(md.posix_acl);
2185                                 md.posix_acl = NULL;
2186                         }
2187 #endif
2188                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2189                         *inode = NULL;
2190                         CERROR("new_inode -fatal: rc %d\n", rc);
2191                         GOTO(out, rc);
2192                 }
2193         }
2194
2195         /* Handling piggyback layout lock.
2196          * Layout lock can be piggybacked by getattr and open request.
2197          * The lsm can be applied to inode only if it comes with a layout lock
2198          * otherwise correct layout may be overwritten, for example:
2199          * 1. proc1: mdt returns a lsm but not granting layout
2200          * 2. layout was changed by another client
2201          * 3. proc2: refresh layout and layout lock granted
2202          * 4. proc1: to apply a stale layout */
2203         if (it != NULL && it->d.lustre.it_lock_mode != 0) {
2204                 struct lustre_handle lockh;
2205                 struct ldlm_lock *lock;
2206
2207                 lockh.cookie = it->d.lustre.it_lock_handle;
2208                 lock = ldlm_handle2lock(&lockh);
2209                 LASSERT(lock != NULL);
2210                 if (ldlm_has_layout(lock)) {
2211                         struct cl_object_conf conf;
2212
2213                         memset(&conf, 0, sizeof(conf));
2214                         conf.coc_opc = OBJECT_CONF_SET;
2215                         conf.coc_inode = *inode;
2216                         conf.coc_lock = lock;
2217                         conf.u.coc_md = &md;
2218                         (void)ll_layout_conf(*inode, &conf);
2219                 }
2220                 LDLM_LOCK_PUT(lock);
2221         }
2222
2223 out:
2224         if (md.lsm != NULL)
2225                 obd_free_memmd(sbi->ll_dt_exp, &md.lsm);
2226         md_free_lustre_md(sbi->ll_md_exp, &md);
2227         RETURN(rc);
2228 }
2229
2230 int ll_obd_statfs(struct inode *inode, void *arg)
2231 {
2232         struct ll_sb_info *sbi = NULL;
2233         struct obd_export *exp;
2234         char *buf = NULL;
2235         struct obd_ioctl_data *data = NULL;
2236         __u32 type;
2237         __u32 flags;
2238         int len = 0, rc;
2239
2240         if (!inode || !(sbi = ll_i2sbi(inode)))
2241                 GOTO(out_statfs, rc = -EINVAL);
2242
2243         rc = obd_ioctl_getdata(&buf, &len, arg);
2244         if (rc)
2245                 GOTO(out_statfs, rc);
2246
2247         data = (void*)buf;
2248         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2249             !data->ioc_pbuf1 || !data->ioc_pbuf2)
2250                 GOTO(out_statfs, rc = -EINVAL);
2251
2252         if (data->ioc_inllen1 != sizeof(__u32) ||
2253             data->ioc_inllen2 != sizeof(__u32) ||
2254             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2255             data->ioc_plen2 != sizeof(struct obd_uuid))
2256                 GOTO(out_statfs, rc = -EINVAL);
2257
2258         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2259         if (type & LL_STATFS_LMV)
2260                 exp = sbi->ll_md_exp;
2261         else if (type & LL_STATFS_LOV)
2262                 exp = sbi->ll_dt_exp;
2263         else
2264                 GOTO(out_statfs, rc = -ENODEV);
2265
2266         flags = (type & LL_STATFS_NODELAY) ? OBD_STATFS_NODELAY : 0;
2267         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, &flags);
2268         if (rc)
2269                 GOTO(out_statfs, rc);
2270 out_statfs:
2271         if (buf)
2272                 obd_ioctl_freedata(buf, len);
2273         return rc;
2274 }
2275
2276 int ll_process_config(struct lustre_cfg *lcfg)
2277 {
2278         char *ptr;
2279         void *sb;
2280         struct lprocfs_static_vars lvars;
2281         unsigned long x;
2282         int rc = 0;
2283
2284         lprocfs_llite_init_vars(&lvars);
2285
2286         /* The instance name contains the sb: lustre-client-aacfe000 */
2287         ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2288         if (!ptr || !*(++ptr))
2289                 return -EINVAL;
2290         if (sscanf(ptr, "%lx", &x) != 1)
2291                 return -EINVAL;
2292         sb = (void *)x;
2293         /* This better be a real Lustre superblock! */
2294         LASSERT(s2lsi((struct super_block *)sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2295
2296         /* Note we have not called client_common_fill_super yet, so
2297            proc fns must be able to handle that! */
2298         rc = class_process_proc_param(PARAM_LLITE, lvars.obd_vars,
2299                                       lcfg, sb);
2300         if (rc > 0)
2301                 rc = 0;
2302         return(rc);
2303 }
2304
2305 /* this function prepares md_op_data hint for passing ot down to MD stack. */
2306 struct md_op_data * ll_prep_md_op_data(struct md_op_data *op_data,
2307                                        struct inode *i1, struct inode *i2,
2308                                        const char *name, int namelen,
2309                                        int mode, __u32 opc, void *data)
2310 {
2311         LASSERT(i1 != NULL);
2312
2313         if (namelen > ll_i2sbi(i1)->ll_namelen)
2314                 return ERR_PTR(-ENAMETOOLONG);
2315
2316         if (op_data == NULL)
2317                 OBD_ALLOC_PTR(op_data);
2318
2319         if (op_data == NULL)
2320                 return ERR_PTR(-ENOMEM);
2321
2322         ll_i2gids(op_data->op_suppgids, i1, i2);
2323         op_data->op_fid1 = *ll_inode2fid(i1);
2324         op_data->op_capa1 = ll_mdscapa_get(i1);
2325
2326         if (i2) {
2327                 op_data->op_fid2 = *ll_inode2fid(i2);
2328                 op_data->op_capa2 = ll_mdscapa_get(i2);
2329         } else {
2330                 fid_zero(&op_data->op_fid2);
2331                 op_data->op_capa2 = NULL;
2332         }
2333
2334         op_data->op_name = name;
2335         op_data->op_namelen = namelen;
2336         op_data->op_mode = mode;
2337         op_data->op_mod_time = cfs_time_current_sec();
2338         op_data->op_fsuid = current_fsuid();
2339         op_data->op_fsgid = current_fsgid();
2340         op_data->op_cap = cfs_curproc_cap_pack();
2341         op_data->op_bias = 0;
2342         op_data->op_cli_flags = 0;
2343         if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2344              filename_is_volatile(name, namelen, NULL))
2345                 op_data->op_bias |= MDS_CREATE_VOLATILE;
2346         op_data->op_opc = opc;
2347         op_data->op_mds = 0;
2348         op_data->op_data = data;
2349
2350         /* If the file is being opened after mknod() (normally due to NFS)
2351          * try to use the default stripe data from parent directory for
2352          * allocating OST objects.  Try to pass the parent FID to MDS. */
2353         if (opc == LUSTRE_OPC_CREATE && i1 == i2 && S_ISREG(i2->i_mode) &&
2354             !ll_i2info(i2)->lli_has_smd) {
2355                 struct ll_inode_info *lli = ll_i2info(i2);
2356
2357                 spin_lock(&lli->lli_lock);
2358                 if (likely(!lli->lli_has_smd && !fid_is_zero(&lli->lli_pfid)))
2359                         op_data->op_fid1 = lli->lli_pfid;
2360                 spin_unlock(&lli->lli_lock);
2361                 /** We ignore parent's capability temporary. */
2362         }
2363
2364         /* When called by ll_setattr_raw, file is i1. */
2365         if (LLIF_DATA_MODIFIED & ll_i2info(i1)->lli_flags)
2366                 op_data->op_bias |= MDS_DATA_MODIFIED;
2367
2368         return op_data;
2369 }
2370
2371 void ll_finish_md_op_data(struct md_op_data *op_data)
2372 {
2373         capa_put(op_data->op_capa1);
2374         capa_put(op_data->op_capa2);
2375         OBD_FREE_PTR(op_data);
2376 }
2377
2378 #ifdef HAVE_SUPEROPS_USE_DENTRY
2379 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2380 #else
2381 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
2382 #endif
2383 {
2384         struct ll_sb_info *sbi;
2385
2386 #ifdef HAVE_SUPEROPS_USE_DENTRY
2387         LASSERT((seq != NULL) && (dentry != NULL));
2388         sbi = ll_s2sbi(dentry->d_sb);
2389 #else
2390         LASSERT((seq != NULL) && (vfs != NULL));
2391         sbi = ll_s2sbi(vfs->mnt_sb);
2392 #endif
2393
2394         if (sbi->ll_flags & LL_SBI_NOLCK)
2395                 seq_puts(seq, ",nolock");
2396
2397         if (sbi->ll_flags & LL_SBI_FLOCK)
2398                 seq_puts(seq, ",flock");
2399
2400         if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2401                 seq_puts(seq, ",localflock");
2402
2403         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2404                 seq_puts(seq, ",user_xattr");
2405
2406         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2407                 seq_puts(seq, ",lazystatfs");
2408
2409         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2410                 seq_puts(seq, ",user_fid2path");
2411
2412         RETURN(0);
2413 }
2414
2415 /**
2416  * Get obd name by cmd, and copy out to user space
2417  */
2418 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2419 {
2420         struct ll_sb_info *sbi = ll_i2sbi(inode);
2421         struct obd_device *obd;
2422         ENTRY;
2423
2424         if (cmd == OBD_IOC_GETDTNAME)
2425                 obd = class_exp2obd(sbi->ll_dt_exp);
2426         else if (cmd == OBD_IOC_GETMDNAME)
2427                 obd = class_exp2obd(sbi->ll_md_exp);
2428         else
2429                 RETURN(-EINVAL);
2430
2431         if (!obd)
2432                 RETURN(-ENOENT);
2433
2434         if (copy_to_user((void *)arg, obd->obd_name,
2435                          strlen(obd->obd_name) + 1))
2436                 RETURN(-EFAULT);
2437
2438         RETURN(0);
2439 }
2440
2441 /**
2442  * Get lustre file system name by \a sbi. If \a buf is provided(non-NULL), the
2443  * fsname will be returned in this buffer; otherwise, a static buffer will be
2444  * used to store the fsname and returned to caller.
2445  */
2446 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
2447 {
2448         static char fsname_static[MTI_NAME_MAXLEN];
2449         struct lustre_sb_info *lsi = s2lsi(sb);
2450         char *ptr;
2451         int len;
2452
2453         if (buf == NULL) {
2454                 /* this means the caller wants to use static buffer
2455                  * and it doesn't care about race. Usually this is
2456                  * in error reporting path */
2457                 buf = fsname_static;
2458                 buflen = sizeof(fsname_static);
2459         }
2460
2461         len = strlen(lsi->lsi_lmd->lmd_profile);
2462         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
2463         if (ptr && (strcmp(ptr, "-client") == 0))
2464                 len -= 7;
2465
2466         if (unlikely(len >= buflen))
2467                 len = buflen - 1;
2468         strncpy(buf, lsi->lsi_lmd->lmd_profile, len);
2469         buf[len] = '\0';
2470
2471         return buf;
2472 }
2473
2474 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
2475 {
2476         char *path = NULL;
2477
2478         struct path p;
2479
2480         p.dentry = dentry;
2481         p.mnt = current->fs->root.mnt;
2482         path_get(&p);
2483         path = d_path(&p, buf, bufsize);
2484         path_put(&p);
2485         return path;
2486 }
2487
2488 void ll_dirty_page_discard_warn(struct page *page, int ioret)
2489 {
2490         char *buf, *path = NULL;
2491         struct dentry *dentry = NULL;
2492         struct ccc_object *obj = cl_inode2ccc(page->mapping->host);
2493
2494         /* this can be called inside spin lock so use GFP_ATOMIC. */
2495         buf = (char *)__get_free_page(GFP_ATOMIC);
2496         if (buf != NULL) {
2497                 dentry = d_find_alias(page->mapping->host);
2498                 if (dentry != NULL)
2499                         path = ll_d_path(dentry, buf, PAGE_SIZE);
2500         }
2501
2502         CWARN("%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
2503               "(rc %d)\n", ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
2504               s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2505               PFID(&obj->cob_header.coh_lu.loh_fid),
2506               (path && !IS_ERR(path)) ? path : "", ioret);
2507
2508         if (dentry != NULL)
2509                 dput(dentry);
2510
2511         if (buf != NULL)
2512                 free_page((unsigned long)buf);
2513 }