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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         if (pages >> (20 - PAGE_CACHE_SHIFT) < 512) {
97                 lru_page_max = pages / 2;
98         } else {
99                 lru_page_max = (pages / 4) * 3;
100         }
101
102         /* initialize lru data */
103         cfs_atomic_set(&sbi->ll_cache.ccc_users, 0);
104         sbi->ll_cache.ccc_lru_max = lru_page_max;
105         cfs_atomic_set(&sbi->ll_cache.ccc_lru_left, lru_page_max);
106         spin_lock_init(&sbi->ll_cache.ccc_lru_lock);
107         CFS_INIT_LIST_HEAD(&sbi->ll_cache.ccc_lru);
108
109         sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
110                                            SBI_DEFAULT_READAHEAD_MAX);
111         sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
112         sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
113                                            SBI_DEFAULT_READAHEAD_WHOLE_MAX;
114         CFS_INIT_LIST_HEAD(&sbi->ll_conn_chain);
115         CFS_INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list);
116
117         ll_generate_random_uuid(uuid);
118         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
119         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
120
121         spin_lock(&ll_sb_lock);
122         cfs_list_add_tail(&sbi->ll_list, &ll_super_blocks);
123         spin_unlock(&ll_sb_lock);
124
125         sbi->ll_flags |= LL_SBI_VERBOSE;
126 #ifdef ENABLE_CHECKSUM
127         sbi->ll_flags |= LL_SBI_CHECKSUM;
128 #endif
129
130 #ifdef HAVE_LRU_RESIZE_SUPPORT
131         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
132 #endif
133
134         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
135                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
136                                pp_r_hist.oh_lock);
137                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
138                                pp_w_hist.oh_lock);
139         }
140
141         /* metadata statahead is enabled by default */
142         sbi->ll_sa_max = LL_SA_RPC_DEF;
143         cfs_atomic_set(&sbi->ll_sa_total, 0);
144         cfs_atomic_set(&sbi->ll_sa_wrong, 0);
145         cfs_atomic_set(&sbi->ll_agl_total, 0);
146         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
147
148         RETURN(sbi);
149 }
150
151 void ll_free_sbi(struct super_block *sb)
152 {
153         struct ll_sb_info *sbi = ll_s2sbi(sb);
154         ENTRY;
155
156         if (sbi != NULL) {
157                 spin_lock(&ll_sb_lock);
158                 cfs_list_del(&sbi->ll_list);
159                 spin_unlock(&ll_sb_lock);
160                 OBD_FREE(sbi, sizeof(*sbi));
161         }
162         EXIT;
163 }
164
165 static struct dentry_operations ll_d_root_ops = {
166         .d_compare = ll_dcompare,
167         .d_revalidate = ll_revalidate_nd,
168 };
169
170 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
171                                     struct vfsmount *mnt)
172 {
173         struct inode *root = 0;
174         struct ll_sb_info *sbi = ll_s2sbi(sb);
175         struct obd_device *obd;
176         struct obd_capa *oc = NULL;
177         struct obd_statfs *osfs = NULL;
178         struct ptlrpc_request *request = NULL;
179         struct obd_connect_data *data = NULL;
180         struct obd_uuid *uuid;
181         struct md_op_data *op_data;
182         struct lustre_md lmd;
183         obd_valid valid;
184         int size, err, checksum;
185         ENTRY;
186
187         obd = class_name2obd(md);
188         if (!obd) {
189                 CERROR("MD %s: not setup or attached\n", md);
190                 RETURN(-EINVAL);
191         }
192
193         OBD_ALLOC_PTR(data);
194         if (data == NULL)
195                 RETURN(-ENOMEM);
196
197         OBD_ALLOC_PTR(osfs);
198         if (osfs == NULL) {
199                 OBD_FREE_PTR(data);
200                 RETURN(-ENOMEM);
201         }
202
203         if (proc_lustre_fs_root) {
204                 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
205                                                   dt, md);
206                 if (err < 0)
207                         CERROR("could not register mount in /proc/fs/lustre\n");
208         }
209
210         /* indicate the features supported by this client */
211         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
212                                   OBD_CONNECT_ATTRFID  |
213                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
214                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
215                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
216                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
217                                   OBD_CONNECT_RMT_CLIENT | OBD_CONNECT_VBR    |
218                                   OBD_CONNECT_FULL20   | OBD_CONNECT_64BITHASH|
219                                   OBD_CONNECT_EINPROGRESS |
220                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
221                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS;
222
223         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
224                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
225
226 #ifdef HAVE_LRU_RESIZE_SUPPORT
227         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
228                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
229 #endif
230 #ifdef CONFIG_FS_POSIX_ACL
231         data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK;
232 #endif
233
234         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
235                 /* flag mdc connection as lightweight, only used for test
236                  * purpose, use with care */
237                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
238
239         data->ocd_ibits_known = MDS_INODELOCK_FULL;
240         data->ocd_version = LUSTRE_VERSION_CODE;
241
242         if (sb->s_flags & MS_RDONLY)
243                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
244         if (sbi->ll_flags & LL_SBI_USER_XATTR)
245                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
246
247 #ifdef HAVE_MS_FLOCK_LOCK
248         /* force vfs to use lustre handler for flock() calls - bug 10743 */
249         sb->s_flags |= MS_FLOCK_LOCK;
250 #endif
251 #ifdef MS_HAS_NEW_AOPS
252         sb->s_flags |= MS_HAS_NEW_AOPS;
253 #endif
254
255         if (sbi->ll_flags & LL_SBI_FLOCK)
256                 sbi->ll_fop = &ll_file_operations_flock;
257         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
258                 sbi->ll_fop = &ll_file_operations;
259         else
260                 sbi->ll_fop = &ll_file_operations_noflock;
261
262         /* real client */
263         data->ocd_connect_flags |= OBD_CONNECT_REAL;
264         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
265                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
266
267         data->ocd_brw_size = MD_MAX_BRW_SIZE;
268
269         err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid, data, NULL);
270         if (err == -EBUSY) {
271                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
272                                    "recovery, of which this client is not a "
273                                    "part. Please wait for recovery to complete,"
274                                    " abort, or time out.\n", md);
275                 GOTO(out, err);
276         } else if (err) {
277                 CERROR("cannot connect to %s: rc = %d\n", md, err);
278                 GOTO(out, err);
279         }
280
281         sbi->ll_md_exp->exp_connect_data = *data;
282
283         err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
284                            LUSTRE_SEQ_METADATA);
285         if (err) {
286                 CERROR("%s: Can't init metadata layer FID infrastructure, "
287                        "rc = %d\n", sbi->ll_md_exp->exp_obd->obd_name, err);
288                 GOTO(out_md, err);
289         }
290
291         /* For mount, we only need fs info from MDT0, and also in DNE, it
292          * can make sure the client can be mounted as long as MDT0 is
293          * avaible */
294         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
295                         cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
296                         OBD_STATFS_FOR_MDT0);
297         if (err)
298                 GOTO(out_md_fid, err);
299
300         /* This needs to be after statfs to ensure connect has finished.
301          * Note that "data" does NOT contain the valid connect reply.
302          * If connecting to a 1.8 server there will be no LMV device, so
303          * we can access the MDC export directly and exp_connect_flags will
304          * be non-zero, but if accessing an upgraded 2.1 server it will
305          * have the correct flags filled in.
306          * XXX: fill in the LMV exp_connect_flags from MDC(s). */
307         valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
308         if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
309             valid != CLIENT_CONNECT_MDT_REQD) {
310                 char *buf;
311
312                 OBD_ALLOC_WAIT(buf, PAGE_CACHE_SIZE);
313                 obd_connect_flags2str(buf, PAGE_CACHE_SIZE,
314                                       valid ^ CLIENT_CONNECT_MDT_REQD, ",");
315                 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
316                                    "feature(s) needed for correct operation "
317                                    "of this client (%s). Please upgrade "
318                                    "server or downgrade client.\n",
319                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
320                 OBD_FREE(buf, PAGE_CACHE_SIZE);
321                 GOTO(out_md_fid, err = -EPROTO);
322         }
323
324         size = sizeof(*data);
325         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
326                            KEY_CONN_DATA,  &size, data, NULL);
327         if (err) {
328                 CERROR("%s: Get connect data failed: rc = %d\n",
329                        sbi->ll_md_exp->exp_obd->obd_name, err);
330                 GOTO(out_md_fid, err);
331         }
332
333         LASSERT(osfs->os_bsize);
334         sb->s_blocksize = osfs->os_bsize;
335         sb->s_blocksize_bits = log2(osfs->os_bsize);
336         sb->s_magic = LL_SUPER_MAGIC;
337         sb->s_maxbytes = MAX_LFS_FILESIZE;
338         sbi->ll_namelen = osfs->os_namelen;
339         sbi->ll_max_rw_chunk = LL_DEFAULT_MAX_RW_CHUNK;
340
341         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
342             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
343                 LCONSOLE_INFO("Disabling user_xattr feature because "
344                               "it is not supported on the server\n");
345                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
346         }
347
348         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
349 #ifdef MS_POSIXACL
350                 sb->s_flags |= MS_POSIXACL;
351 #endif
352                 sbi->ll_flags |= LL_SBI_ACL;
353         } else {
354                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
355 #ifdef MS_POSIXACL
356                 sb->s_flags &= ~MS_POSIXACL;
357 #endif
358                 sbi->ll_flags &= ~LL_SBI_ACL;
359         }
360
361         if (data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) {
362                 if (!(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
363                         sbi->ll_flags |= LL_SBI_RMT_CLIENT;
364                         LCONSOLE_INFO("client is set as remote by default.\n");
365                 }
366         } else {
367                 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
368                         sbi->ll_flags &= ~LL_SBI_RMT_CLIENT;
369                         LCONSOLE_INFO("client claims to be remote, but server "
370                                       "rejected, forced to be local.\n");
371                 }
372         }
373
374         if (data->ocd_connect_flags & OBD_CONNECT_MDS_CAPA) {
375                 LCONSOLE_INFO("client enabled MDS capability!\n");
376                 sbi->ll_flags |= LL_SBI_MDS_CAPA;
377         }
378
379         if (data->ocd_connect_flags & OBD_CONNECT_OSS_CAPA) {
380                 LCONSOLE_INFO("client enabled OSS capability!\n");
381                 sbi->ll_flags |= LL_SBI_OSS_CAPA;
382         }
383
384         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
385                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
386
387         if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE)
388                 sbi->ll_md_brw_size = data->ocd_brw_size;
389         else
390                 sbi->ll_md_brw_size = PAGE_CACHE_SIZE;
391
392         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK) {
393                 LCONSOLE_INFO("Layout lock feature supported.\n");
394                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
395         }
396
397         obd = class_name2obd(dt);
398         if (!obd) {
399                 CERROR("DT %s: not setup or attached\n", dt);
400                 GOTO(out_md_fid, err = -ENODEV);
401         }
402
403         data->ocd_connect_flags = OBD_CONNECT_GRANT     | OBD_CONNECT_VERSION  |
404                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
405                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID      |
406                                   OBD_CONNECT_SRVLOCK   | OBD_CONNECT_TRUNCLOCK|
407                                   OBD_CONNECT_AT | OBD_CONNECT_RMT_CLIENT |
408                                   OBD_CONNECT_OSS_CAPA | OBD_CONNECT_VBR|
409                                   OBD_CONNECT_FULL20 | OBD_CONNECT_64BITHASH |
410                                   OBD_CONNECT_MAXBYTES |
411                                   OBD_CONNECT_EINPROGRESS |
412                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
413                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS;
414
415         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
416                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
417
418         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_CKSUM)) {
419                 /* OBD_CONNECT_CKSUM should always be set, even if checksums are
420                  * disabled by default, because it can still be enabled on the
421                  * fly via /proc. As a consequence, we still need to come to an
422                  * agreement on the supported algorithms at connect time */
423                 data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
424
425                 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
426                         data->ocd_cksum_types = OBD_CKSUM_ADLER;
427                 else
428                         data->ocd_cksum_types = cksum_types_supported_client();
429         }
430
431 #ifdef HAVE_LRU_RESIZE_SUPPORT
432         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
433 #endif
434         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
435                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
436
437         CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d "
438                "ocd_grant: %d\n", data->ocd_connect_flags,
439                data->ocd_version, data->ocd_grant);
440
441         obd->obd_upcall.onu_owner = &sbi->ll_lco;
442         obd->obd_upcall.onu_upcall = cl_ocd_update;
443
444         data->ocd_brw_size = DT_MAX_BRW_SIZE;
445
446         err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data,
447                           NULL);
448         if (err == -EBUSY) {
449                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
450                                    "recovery, of which this client is not a "
451                                    "part.  Please wait for recovery to "
452                                    "complete, abort, or time out.\n", dt);
453                 GOTO(out_md, err);
454         } else if (err) {
455                 CERROR("%s: Cannot connect to %s: rc = %d\n",
456                        sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
457                 GOTO(out_md, err);
458         }
459
460         sbi->ll_dt_exp->exp_connect_data = *data;
461
462         err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
463                            LUSTRE_SEQ_METADATA);
464         if (err) {
465                 CERROR("%s: Can't init data layer FID infrastructure, "
466                        "rc = %d\n", sbi->ll_dt_exp->exp_obd->obd_name, err);
467                 GOTO(out_dt, err);
468         }
469
470         mutex_lock(&sbi->ll_lco.lco_lock);
471         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
472         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
473         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
474         mutex_unlock(&sbi->ll_lco.lco_lock);
475
476         fid_zero(&sbi->ll_root_fid);
477         err = md_getstatus(sbi->ll_md_exp, &sbi->ll_root_fid, &oc);
478         if (err) {
479                 CERROR("cannot mds_connect: rc = %d\n", err);
480                 GOTO(out_lock_cn_cb, err);
481         }
482         if (!fid_is_sane(&sbi->ll_root_fid)) {
483                 CERROR("%s: Invalid root fid "DFID" during mount\n",
484                        sbi->ll_md_exp->exp_obd->obd_name,
485                        PFID(&sbi->ll_root_fid));
486                 GOTO(out_lock_cn_cb, err = -EINVAL);
487         }
488         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
489
490         sb->s_op = &lustre_super_operations;
491 #if THREAD_SIZE >= 8192 /*b=17630*/
492         sb->s_export_op = &lustre_export_operations;
493 #endif
494
495         /* make root inode
496          * XXX: move this to after cbd setup? */
497         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMDSCAPA;
498         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
499                 valid |= OBD_MD_FLRMTPERM;
500         else if (sbi->ll_flags & LL_SBI_ACL)
501                 valid |= OBD_MD_FLACL;
502
503         OBD_ALLOC_PTR(op_data);
504         if (op_data == NULL)
505                 GOTO(out_lock_cn_cb, err = -ENOMEM);
506
507         op_data->op_fid1 = sbi->ll_root_fid;
508         op_data->op_mode = 0;
509         op_data->op_capa1 = oc;
510         op_data->op_valid = valid;
511
512         err = md_getattr(sbi->ll_md_exp, op_data, &request);
513         if (oc)
514                 capa_put(oc);
515         OBD_FREE_PTR(op_data);
516         if (err) {
517                 CERROR("%s: md_getattr failed for root: rc = %d\n",
518                        sbi->ll_md_exp->exp_obd->obd_name, err);
519                 GOTO(out_lock_cn_cb, err);
520         }
521
522         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
523                                sbi->ll_md_exp, &lmd);
524         if (err) {
525                 CERROR("failed to understand root inode md: rc = %d\n", err);
526                 ptlrpc_req_finished(request);
527                 GOTO(out_lock_cn_cb, err);
528         }
529
530         LASSERT(fid_is_sane(&sbi->ll_root_fid));
531         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
532                                             sbi->ll_flags & LL_SBI_32BIT_API),
533                        &lmd);
534         md_free_lustre_md(sbi->ll_md_exp, &lmd);
535         ptlrpc_req_finished(request);
536
537         if (root == NULL || IS_ERR(root)) {
538                 if (lmd.lsm)
539                         obd_free_memmd(sbi->ll_dt_exp, &lmd.lsm);
540 #ifdef CONFIG_FS_POSIX_ACL
541                 if (lmd.posix_acl) {
542                         posix_acl_release(lmd.posix_acl);
543                         lmd.posix_acl = NULL;
544                 }
545 #endif
546                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
547                 root = NULL;
548                 CERROR("lustre_lite: bad iget4 for root\n");
549                 GOTO(out_root, err);
550         }
551
552         err = ll_close_thread_start(&sbi->ll_lcq);
553         if (err) {
554                 CERROR("cannot start close thread: rc %d\n", err);
555                 GOTO(out_root, err);
556         }
557
558 #ifdef CONFIG_FS_POSIX_ACL
559         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
560                 rct_init(&sbi->ll_rct);
561                 et_init(&sbi->ll_et);
562         }
563 #endif
564
565         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
566         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
567                                  KEY_CHECKSUM, sizeof(checksum), &checksum,
568                                  NULL);
569         cl_sb_init(sb);
570
571         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CACHE_SET),
572                                  KEY_CACHE_SET, sizeof(sbi->ll_cache),
573                                  &sbi->ll_cache, NULL);
574
575         sb->s_root = d_make_root(root);
576         if (sb->s_root == NULL) {
577                 CERROR("%s: can't make root dentry\n",
578                         ll_get_fsname(sb, NULL, 0));
579                 GOTO(out_root, err = -ENOMEM);
580         }
581
582 #ifdef HAVE_DCACHE_LOCK
583         sb->s_root->d_op = &ll_d_root_ops;
584 #else
585         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
586         d_set_d_op(sb->s_root, &ll_d_root_ops);
587         sb->s_d_op = &ll_d_ops;
588 #endif
589
590         sbi->ll_sdev_orig = sb->s_dev;
591
592         /* We set sb->s_dev equal on all lustre clients in order to support
593          * NFS export clustering.  NFSD requires that the FSID be the same
594          * on all clients. */
595         /* s_dev is also used in lt_compare() to compare two fs, but that is
596          * only a node-local comparison. */
597         uuid = obd_get_uuid(sbi->ll_md_exp);
598         if (uuid != NULL) {
599                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
600                 get_uuid2fsid(uuid->uuid, strlen(uuid->uuid), &sbi->ll_fsid);
601         }
602
603         if (data != NULL)
604                 OBD_FREE_PTR(data);
605         if (osfs != NULL)
606                 OBD_FREE_PTR(osfs);
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         lprocfs_unregister_mountpoint(sbi);
630         return err;
631 }
632
633 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
634 {
635         int size, rc;
636
637         *lmmsize = obd_size_diskmd(sbi->ll_dt_exp, NULL);
638         size = sizeof(int);
639         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
640                           KEY_MAX_EASIZE, &size, lmmsize, NULL);
641         if (rc)
642                 CERROR("Get max mdsize error rc %d \n", rc);
643
644         RETURN(rc);
645 }
646
647 void ll_dump_inode(struct inode *inode)
648 {
649         struct ll_d_hlist_node *tmp;
650         int dentry_count = 0;
651
652         LASSERT(inode != NULL);
653
654         ll_d_hlist_for_each(tmp, &inode->i_dentry)
655                 dentry_count++;
656
657         CERROR("inode %p dump: dev=%s ino=%lu mode=%o count=%u, %d dentries\n",
658                inode, ll_i2mdexp(inode)->exp_obd->obd_name, inode->i_ino,
659                inode->i_mode, atomic_read(&inode->i_count), dentry_count);
660 }
661
662 void lustre_dump_dentry(struct dentry *dentry, int recur)
663 {
664         struct list_head *tmp;
665         int subdirs = 0;
666
667         LASSERT(dentry != NULL);
668
669         list_for_each(tmp, &dentry->d_subdirs)
670                 subdirs++;
671
672         CERROR("dentry %p dump: name=%.*s parent=%.*s (%p), inode=%p, count=%u,"
673                " flags=0x%x, fsdata=%p, %d subdirs\n", dentry,
674                dentry->d_name.len, dentry->d_name.name,
675                dentry->d_parent->d_name.len, dentry->d_parent->d_name.name,
676                dentry->d_parent, dentry->d_inode, d_refcount(dentry),
677                dentry->d_flags, dentry->d_fsdata, subdirs);
678         if (dentry->d_inode != NULL)
679                 ll_dump_inode(dentry->d_inode);
680
681         if (recur == 0)
682                 return;
683
684         list_for_each(tmp, &dentry->d_subdirs) {
685                 struct dentry *d = list_entry(tmp, struct dentry, d_u.d_child);
686                 lustre_dump_dentry(d, recur - 1);
687         }
688 }
689
690 void client_common_put_super(struct super_block *sb)
691 {
692         struct ll_sb_info *sbi = ll_s2sbi(sb);
693         ENTRY;
694
695 #ifdef CONFIG_FS_POSIX_ACL
696         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
697                 et_fini(&sbi->ll_et);
698                 rct_fini(&sbi->ll_rct);
699         }
700 #endif
701
702         ll_close_thread_shutdown(sbi->ll_lcq);
703
704         cl_sb_fini(sb);
705
706         cfs_list_del(&sbi->ll_conn_chain);
707
708         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
709         obd_disconnect(sbi->ll_dt_exp);
710         sbi->ll_dt_exp = NULL;
711         /* wait till all OSCs are gone, since cl_cache is accessing sbi.
712          * see LU-2543. */
713         obd_zombie_barrier();
714
715         lprocfs_unregister_mountpoint(sbi);
716
717         obd_fid_fini(sbi->ll_md_exp->exp_obd);
718         obd_disconnect(sbi->ll_md_exp);
719         sbi->ll_md_exp = NULL;
720
721         EXIT;
722 }
723
724 void ll_kill_super(struct super_block *sb)
725 {
726         struct ll_sb_info *sbi;
727
728         ENTRY;
729
730         /* not init sb ?*/
731         if (!(sb->s_flags & MS_ACTIVE))
732                 return;
733
734         sbi = ll_s2sbi(sb);
735         /* we need restore s_dev from changed for clustred NFS before put_super
736          * because new kernels have cached s_dev and change sb->s_dev in
737          * put_super not affected real removing devices */
738         if (sbi) {
739                 sb->s_dev = sbi->ll_sdev_orig;
740                 sbi->ll_umounting = 1;
741         }
742         EXIT;
743 }
744
745 char *ll_read_opt(const char *opt, char *data)
746 {
747         char *value;
748         char *retval;
749         ENTRY;
750
751         CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
752         if (strncmp(opt, data, strlen(opt)))
753                 RETURN(NULL);
754         if ((value = strchr(data, '=')) == NULL)
755                 RETURN(NULL);
756
757         value++;
758         OBD_ALLOC(retval, strlen(value) + 1);
759         if (!retval) {
760                 CERROR("out of memory!\n");
761                 RETURN(NULL);
762         }
763
764         memcpy(retval, value, strlen(value)+1);
765         CDEBUG(D_SUPER, "Assigned option: %s, value %s\n", opt, retval);
766         RETURN(retval);
767 }
768
769 static inline int ll_set_opt(const char *opt, char *data, int fl)
770 {
771         if (strncmp(opt, data, strlen(opt)) != 0)
772                 return(0);
773         else
774                 return(fl);
775 }
776
777 /* non-client-specific mount options are parsed in lmd_parse */
778 static int ll_options(char *options, int *flags)
779 {
780         int tmp;
781         char *s1 = options, *s2;
782         ENTRY;
783
784         if (!options)
785                 RETURN(0);
786
787         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
788
789         while (*s1) {
790                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
791                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
792                 if (tmp) {
793                         *flags |= tmp;
794                         goto next;
795                 }
796                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
797                 if (tmp) {
798                         *flags |= tmp;
799                         goto next;
800                 }
801                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
802                 if (tmp) {
803                         *flags |= tmp;
804                         goto next;
805                 }
806                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
807                 if (tmp) {
808                         *flags &= ~tmp;
809                         goto next;
810                 }
811                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
812                 if (tmp) {
813                         *flags |= tmp;
814                         goto next;
815                 }
816                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
817                 if (tmp) {
818                         *flags &= ~tmp;
819                         goto next;
820                 }
821 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 5, 50, 0)
822                 tmp = ll_set_opt("acl", s1, LL_SBI_ACL);
823                 if (tmp) {
824                         /* Ignore deprecated mount option.  The client will
825                          * always try to mount with ACL support, whether this
826                          * is used depends on whether server supports it. */
827                         LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
828                                                   "mount option 'acl'.\n");
829                         goto next;
830                 }
831                 tmp = ll_set_opt("noacl", s1, LL_SBI_ACL);
832                 if (tmp) {
833                         LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
834                                                   "mount option 'noacl'.\n");
835                         goto next;
836                 }
837 #else
838 #warning "{no}acl options have been deprecated since 1.8, please remove them"
839 #endif
840                 tmp = ll_set_opt("remote_client", s1, LL_SBI_RMT_CLIENT);
841                 if (tmp) {
842                         *flags |= tmp;
843                         goto next;
844                 }
845                 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
846                 if (tmp) {
847                         *flags |= tmp;
848                         goto next;
849                 }
850                 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
851                 if (tmp) {
852                         *flags &= ~tmp;
853                         goto next;
854                 }
855
856                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
857                 if (tmp) {
858                         *flags |= tmp;
859                         goto next;
860                 }
861                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
862                 if (tmp) {
863                         *flags &= ~tmp;
864                         goto next;
865                 }
866                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
867                 if (tmp) {
868                         *flags |= tmp;
869                         goto next;
870                 }
871                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
872                 if (tmp) {
873                         *flags &= ~tmp;
874                         goto next;
875                 }
876                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
877                 if (tmp) {
878                         *flags |= tmp;
879                         goto next;
880                 }
881                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
882                 if (tmp) {
883                         *flags &= ~tmp;
884                         goto next;
885                 }
886                 tmp = ll_set_opt("som_preview", s1, LL_SBI_SOM_PREVIEW);
887                 if (tmp) {
888                         *flags |= tmp;
889                         goto next;
890                 }
891                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
892                 if (tmp) {
893                         *flags |= tmp;
894                         goto next;
895                 }
896                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
897                 if (tmp) {
898                         *flags |= tmp;
899                         goto next;
900                 }
901                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
902                 if (tmp) {
903                         *flags &= ~tmp;
904                         goto next;
905                 }
906                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
907                                    s1);
908                 RETURN(-EINVAL);
909
910 next:
911                 /* Find next opt */
912                 s2 = strchr(s1, ',');
913                 if (s2 == NULL)
914                         break;
915                 s1 = s2 + 1;
916         }
917         RETURN(0);
918 }
919
920 void ll_lli_init(struct ll_inode_info *lli)
921 {
922         lli->lli_inode_magic = LLI_INODE_MAGIC;
923         lli->lli_flags = 0;
924         lli->lli_ioepoch = 0;
925         lli->lli_maxbytes = MAX_LFS_FILESIZE;
926         spin_lock_init(&lli->lli_lock);
927         lli->lli_posix_acl = NULL;
928         lli->lli_remote_perms = NULL;
929         mutex_init(&lli->lli_rmtperm_mutex);
930         /* Do not set lli_fid, it has been initialized already. */
931         fid_zero(&lli->lli_pfid);
932         CFS_INIT_LIST_HEAD(&lli->lli_close_list);
933         CFS_INIT_LIST_HEAD(&lli->lli_oss_capas);
934         cfs_atomic_set(&lli->lli_open_count, 0);
935         lli->lli_mds_capa = NULL;
936         lli->lli_rmtperm_time = 0;
937         lli->lli_pending_och = NULL;
938         lli->lli_mds_read_och = NULL;
939         lli->lli_mds_write_och = NULL;
940         lli->lli_mds_exec_och = NULL;
941         lli->lli_open_fd_read_count = 0;
942         lli->lli_open_fd_write_count = 0;
943         lli->lli_open_fd_exec_count = 0;
944         mutex_init(&lli->lli_och_mutex);
945         spin_lock_init(&lli->lli_agl_lock);
946         lli->lli_has_smd = false;
947         lli->lli_layout_gen = LL_LAYOUT_GEN_NONE;
948         lli->lli_clob = NULL;
949
950         LASSERT(lli->lli_vfs_inode.i_mode != 0);
951         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
952                 mutex_init(&lli->lli_readdir_mutex);
953                 lli->lli_opendir_key = NULL;
954                 lli->lli_sai = NULL;
955                 lli->lli_def_acl = NULL;
956                 spin_lock_init(&lli->lli_sa_lock);
957                 lli->lli_opendir_pid = 0;
958         } else {
959                 sema_init(&lli->lli_size_sem, 1);
960                 lli->lli_size_sem_owner = NULL;
961                 lli->lli_symlink_name = NULL;
962                 init_rwsem(&lli->lli_trunc_sem);
963                 mutex_init(&lli->lli_write_mutex);
964                 init_rwsem(&lli->lli_glimpse_sem);
965                 lli->lli_glimpse_time = 0;
966                 CFS_INIT_LIST_HEAD(&lli->lli_agl_list);
967                 lli->lli_agl_index = 0;
968                 lli->lli_async_rc = 0;
969                 lli->lli_volatile = false;
970         }
971         mutex_init(&lli->lli_layout_mutex);
972 }
973
974 static inline int ll_bdi_register(struct backing_dev_info *bdi)
975 {
976         static atomic_t ll_bdi_num = ATOMIC_INIT(0);
977
978         bdi->name = "lustre";
979         return bdi_register(bdi, NULL, "lustre-%d",
980                             atomic_inc_return(&ll_bdi_num));
981 }
982
983 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
984 {
985         struct lustre_profile *lprof = NULL;
986         struct lustre_sb_info *lsi = s2lsi(sb);
987         struct ll_sb_info *sbi;
988         char  *dt = NULL, *md = NULL;
989         char  *profilenm = get_profile_name(sb);
990         struct config_llog_instance *cfg;
991         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
992         const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
993         int    err;
994         ENTRY;
995
996         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
997
998         OBD_ALLOC_PTR(cfg);
999         if (cfg == NULL)
1000                 RETURN(-ENOMEM);
1001
1002         cfs_module_get();
1003
1004         /* client additional sb info */
1005         lsi->lsi_llsbi = sbi = ll_init_sbi();
1006         if (!sbi) {
1007                 cfs_module_put(THIS_MODULE);
1008                 OBD_FREE_PTR(cfg);
1009                 RETURN(-ENOMEM);
1010         }
1011
1012         err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
1013         if (err)
1014                 GOTO(out_free, err);
1015
1016         err = bdi_init(&lsi->lsi_bdi);
1017         if (err)
1018                 GOTO(out_free, err);
1019         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
1020         lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
1021         err = ll_bdi_register(&lsi->lsi_bdi);
1022         if (err)
1023                 GOTO(out_free, err);
1024
1025         sb->s_bdi = &lsi->lsi_bdi;
1026
1027         /* Generate a string unique to this super, in case some joker tries
1028            to mount the same fs at two mount points.
1029            Use the address of the super itself.*/
1030         cfg->cfg_instance = sb;
1031         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
1032         cfg->cfg_callback = class_config_llog_handler;
1033         /* set up client obds */
1034         err = lustre_process_log(sb, profilenm, cfg);
1035         if (err < 0) {
1036                 CERROR("Unable to process log: %d\n", err);
1037                 GOTO(out_free, err);
1038         }
1039
1040         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1041         lprof = class_get_profile(profilenm);
1042         if (lprof == NULL) {
1043                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1044                                    " read from the MGS.  Does that filesystem "
1045                                    "exist?\n", profilenm);
1046                 GOTO(out_free, err = -EINVAL);
1047         }
1048         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1049                lprof->lp_md, lprof->lp_dt);
1050
1051         OBD_ALLOC(dt, strlen(lprof->lp_dt) + instlen + 2);
1052         if (!dt)
1053                 GOTO(out_free, err = -ENOMEM);
1054         sprintf(dt, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
1055
1056         OBD_ALLOC(md, strlen(lprof->lp_md) + instlen + 2);
1057         if (!md)
1058                 GOTO(out_free, err = -ENOMEM);
1059         sprintf(md, "%s-%p", lprof->lp_md, cfg->cfg_instance);
1060
1061         /* connections, registrations, sb setup */
1062         err = client_common_fill_super(sb, md, dt, mnt);
1063
1064 out_free:
1065         if (md)
1066                 OBD_FREE(md, strlen(lprof->lp_md) + instlen + 2);
1067         if (dt)
1068                 OBD_FREE(dt, strlen(lprof->lp_dt) + instlen + 2);
1069         if (err)
1070                 ll_put_super(sb);
1071         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1072                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1073
1074         OBD_FREE_PTR(cfg);
1075         RETURN(err);
1076 } /* ll_fill_super */
1077
1078
1079 void lu_context_keys_dump(void);
1080
1081 void ll_put_super(struct super_block *sb)
1082 {
1083         struct config_llog_instance cfg;
1084         struct obd_device *obd;
1085         struct lustre_sb_info *lsi = s2lsi(sb);
1086         struct ll_sb_info *sbi = ll_s2sbi(sb);
1087         char *profilenm = get_profile_name(sb);
1088         int force = 1, next;
1089         ENTRY;
1090
1091         CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1092
1093         ll_print_capa_stat(sbi);
1094
1095         cfg.cfg_instance = sb;
1096         lustre_end_log(sb, profilenm, &cfg);
1097
1098         if (sbi->ll_md_exp) {
1099                 obd = class_exp2obd(sbi->ll_md_exp);
1100                 if (obd)
1101                         force = obd->obd_force;
1102         }
1103
1104         /* We need to set force before the lov_disconnect in
1105            lustre_common_put_super, since l_d cleans up osc's as well. */
1106         if (force) {
1107                 next = 0;
1108                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1109                                                      &next)) != NULL) {
1110                         obd->obd_force = force;
1111                 }
1112         }
1113
1114         if (sbi->ll_lcq) {
1115                 /* Only if client_common_fill_super succeeded */
1116                 client_common_put_super(sb);
1117         }
1118
1119         next = 0;
1120         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1121                 class_manual_cleanup(obd);
1122         }
1123
1124         if (sbi->ll_flags & LL_SBI_VERBOSE)
1125                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1126
1127         if (profilenm)
1128                 class_del_profile(profilenm);
1129
1130         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1131                 bdi_destroy(&lsi->lsi_bdi);
1132                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1133         }
1134
1135         ll_free_sbi(sb);
1136         lsi->lsi_llsbi = NULL;
1137
1138         lustre_common_put_super(sb);
1139
1140         cfs_module_put(THIS_MODULE);
1141
1142         EXIT;
1143 } /* client_put_super */
1144
1145 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1146 {
1147         struct inode *inode = NULL;
1148
1149         /* NOTE: we depend on atomic igrab() -bzzz */
1150         lock_res_and_lock(lock);
1151         if (lock->l_resource->lr_lvb_inode) {
1152                 struct ll_inode_info * lli;
1153                 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1154                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1155                         inode = igrab(lock->l_resource->lr_lvb_inode);
1156                 } else {
1157                         inode = lock->l_resource->lr_lvb_inode;
1158                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1159                                          D_WARNING, lock, "lr_lvb_inode %p is "
1160                                          "bogus: magic %08x",
1161                                          lock->l_resource->lr_lvb_inode,
1162                                          lli->lli_inode_magic);
1163                         inode = NULL;
1164                 }
1165         }
1166         unlock_res_and_lock(lock);
1167         return inode;
1168 }
1169
1170 struct inode *ll_inode_from_lock(struct ldlm_lock *lock)
1171 {
1172         struct inode *inode = NULL;
1173         /* NOTE: we depend on atomic igrab() -bzzz */
1174         lock_res_and_lock(lock);
1175         if (lock->l_ast_data) {
1176                 struct ll_inode_info *lli = ll_i2info(lock->l_ast_data);
1177                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1178                         inode = igrab(lock->l_ast_data);
1179                 } else {
1180                         inode = lock->l_ast_data;
1181                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1182                                          D_WARNING, lock, "l_ast_data %p is "
1183                                          "bogus: magic %08x", lock->l_ast_data,
1184                                          lli->lli_inode_magic);
1185                         inode = NULL;
1186                 }
1187         }
1188         unlock_res_and_lock(lock);
1189         return inode;
1190 }
1191
1192 void ll_clear_inode(struct inode *inode)
1193 {
1194         struct ll_inode_info *lli = ll_i2info(inode);
1195         struct ll_sb_info *sbi = ll_i2sbi(inode);
1196         ENTRY;
1197
1198         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
1199                inode->i_generation, inode);
1200
1201         if (S_ISDIR(inode->i_mode)) {
1202                 /* these should have been cleared in ll_file_release */
1203                 LASSERT(lli->lli_opendir_key == NULL);
1204                 LASSERT(lli->lli_sai == NULL);
1205                 LASSERT(lli->lli_opendir_pid == 0);
1206         }
1207
1208         spin_lock(&lli->lli_lock);
1209         ll_i2info(inode)->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
1210         spin_unlock(&lli->lli_lock);
1211         md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1212
1213         LASSERT(!lli->lli_open_fd_write_count);
1214         LASSERT(!lli->lli_open_fd_read_count);
1215         LASSERT(!lli->lli_open_fd_exec_count);
1216
1217         if (lli->lli_mds_write_och)
1218                 ll_md_real_close(inode, FMODE_WRITE);
1219         if (lli->lli_mds_exec_och)
1220                 ll_md_real_close(inode, FMODE_EXEC);
1221         if (lli->lli_mds_read_och)
1222                 ll_md_real_close(inode, FMODE_READ);
1223
1224         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1225                 OBD_FREE(lli->lli_symlink_name,
1226                          strlen(lli->lli_symlink_name) + 1);
1227                 lli->lli_symlink_name = NULL;
1228         }
1229
1230         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1231                 LASSERT(lli->lli_posix_acl == NULL);
1232                 if (lli->lli_remote_perms) {
1233                         free_rmtperm_hash(lli->lli_remote_perms);
1234                         lli->lli_remote_perms = NULL;
1235                 }
1236         }
1237 #ifdef CONFIG_FS_POSIX_ACL
1238         else if (lli->lli_posix_acl) {
1239                 LASSERT(cfs_atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1240                 LASSERT(lli->lli_remote_perms == NULL);
1241                 posix_acl_release(lli->lli_posix_acl);
1242                 lli->lli_posix_acl = NULL;
1243         }
1244 #endif
1245         lli->lli_inode_magic = LLI_INODE_DEAD;
1246
1247         ll_clear_inode_capas(inode);
1248         if (!S_ISDIR(inode->i_mode))
1249                 LASSERT(cfs_list_empty(&lli->lli_agl_list));
1250
1251         /*
1252          * XXX This has to be done before lsm is freed below, because
1253          * cl_object still uses inode lsm.
1254          */
1255         cl_inode_fini(inode);
1256         lli->lli_has_smd = false;
1257
1258         EXIT;
1259 }
1260
1261 int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data,
1262                   struct md_open_data **mod)
1263 {
1264         struct lustre_md md;
1265         struct inode *inode = dentry->d_inode;
1266         struct ll_sb_info *sbi = ll_i2sbi(inode);
1267         struct ptlrpc_request *request = NULL;
1268         int rc, ia_valid;
1269         ENTRY;
1270
1271         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1272                                      LUSTRE_OPC_ANY, NULL);
1273         if (IS_ERR(op_data))
1274                 RETURN(PTR_ERR(op_data));
1275
1276         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, NULL, 0,
1277                         &request, mod);
1278         if (rc) {
1279                 ptlrpc_req_finished(request);
1280                 if (rc == -ENOENT) {
1281                         clear_nlink(inode);
1282                         /* Unlinked special device node? Or just a race?
1283                          * Pretend we done everything. */
1284                         if (!S_ISREG(inode->i_mode) &&
1285                             !S_ISDIR(inode->i_mode)) {
1286                                 ia_valid = op_data->op_attr.ia_valid;
1287                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1288                                 rc = simple_setattr(dentry, &op_data->op_attr);
1289                                 op_data->op_attr.ia_valid = ia_valid;
1290                         }
1291                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1292                         CERROR("md_setattr fails: rc = %d\n", rc);
1293                 }
1294                 RETURN(rc);
1295         }
1296
1297         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1298                               sbi->ll_md_exp, &md);
1299         if (rc) {
1300                 ptlrpc_req_finished(request);
1301                 RETURN(rc);
1302         }
1303
1304         ia_valid = op_data->op_attr.ia_valid;
1305         /* inode size will be in ll_setattr_ost, can't do it now since dirty
1306          * cache is not cleared yet. */
1307         op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1308         rc = simple_setattr(dentry, &op_data->op_attr);
1309         op_data->op_attr.ia_valid = ia_valid;
1310
1311         /* Extract epoch data if obtained. */
1312         op_data->op_handle = md.body->handle;
1313         op_data->op_ioepoch = md.body->ioepoch;
1314
1315         ll_update_inode(inode, &md);
1316         ptlrpc_req_finished(request);
1317
1318         RETURN(rc);
1319 }
1320
1321 /* Close IO epoch and send Size-on-MDS attribute update. */
1322 static int ll_setattr_done_writing(struct inode *inode,
1323                                    struct md_op_data *op_data,
1324                                    struct md_open_data *mod)
1325 {
1326         struct ll_inode_info *lli = ll_i2info(inode);
1327         int rc = 0;
1328         ENTRY;
1329
1330         LASSERT(op_data != NULL);
1331         if (!S_ISREG(inode->i_mode))
1332                 RETURN(0);
1333
1334         CDEBUG(D_INODE, "Epoch "LPU64" closed on "DFID" for truncate\n",
1335                op_data->op_ioepoch, PFID(&lli->lli_fid));
1336
1337         op_data->op_flags = MF_EPOCH_CLOSE;
1338         ll_done_writing_attr(inode, op_data);
1339         ll_pack_inode2opdata(inode, op_data, NULL);
1340
1341         rc = md_done_writing(ll_i2sbi(inode)->ll_md_exp, op_data, mod);
1342         if (rc == -EAGAIN) {
1343                 /* MDS has instructed us to obtain Size-on-MDS attribute
1344                  * from OSTs and send setattr to back to MDS. */
1345                 rc = ll_som_update(inode, op_data);
1346         } else if (rc) {
1347                 CERROR("inode %lu mdc truncate failed: rc = %d\n",
1348                        inode->i_ino, rc);
1349         }
1350         RETURN(rc);
1351 }
1352
1353 static int ll_setattr_ost(struct inode *inode, struct iattr *attr)
1354 {
1355         struct obd_capa *capa;
1356         int rc;
1357
1358         if (attr->ia_valid & ATTR_SIZE)
1359                 capa = ll_osscapa_get(inode, CAPA_OPC_OSS_TRUNC);
1360         else
1361                 capa = ll_mdscapa_get(inode);
1362
1363         rc = cl_setattr_ost(inode, attr, capa);
1364
1365         if (attr->ia_valid & ATTR_SIZE)
1366                 ll_truncate_free_capa(capa);
1367         else
1368                 capa_put(capa);
1369
1370         return rc;
1371 }
1372
1373 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1374  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1375  * keep these values until such a time that objects are allocated for it.
1376  * We do the MDS operations first, as it is checking permissions for us.
1377  * We don't to the MDS RPC if there is nothing that we want to store there,
1378  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1379  * going to do an RPC anyways.
1380  *
1381  * If we are doing a truncate, we will send the mtime and ctime updates
1382  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1383  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1384  * at the same time.
1385  */
1386 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr)
1387 {
1388         struct inode *inode = dentry->d_inode;
1389         struct ll_inode_info *lli = ll_i2info(inode);
1390         struct md_op_data *op_data = NULL;
1391         struct md_open_data *mod = NULL;
1392         int rc = 0, rc1 = 0;
1393         ENTRY;
1394
1395         CDEBUG(D_VFSTRACE, "%s: setattr inode %p/fid:"DFID" from %llu to %llu, "
1396                 "valid %x\n", ll_get_fsname(inode->i_sb, NULL, 0), inode,
1397                 PFID(&lli->lli_fid), i_size_read(inode), attr->ia_size,
1398                 attr->ia_valid);
1399
1400         if (attr->ia_valid & ATTR_SIZE) {
1401                 /* Check new size against VFS/VM file size limit and rlimit */
1402                 rc = inode_newsize_ok(inode, attr->ia_size);
1403                 if (rc)
1404                         RETURN(rc);
1405
1406                 /* The maximum Lustre file size is variable, based on the
1407                  * OST maximum object size and number of stripes.  This
1408                  * needs another check in addition to the VFS check above. */
1409                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1410                         CDEBUG(D_INODE,"file "DFID" too large %llu > "LPU64"\n",
1411                                PFID(&lli->lli_fid), attr->ia_size,
1412                                ll_file_maxbytes(inode));
1413                         RETURN(-EFBIG);
1414                 }
1415
1416                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1417         }
1418
1419         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1420         if (attr->ia_valid & TIMES_SET_FLAGS) {
1421                 if (cfs_curproc_fsuid() != inode->i_uid &&
1422                     !cfs_capable(CFS_CAP_FOWNER))
1423                         RETURN(-EPERM);
1424         }
1425
1426         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1427         if (attr->ia_valid & ATTR_CTIME) {
1428                 attr->ia_ctime = CFS_CURRENT_TIME;
1429                 attr->ia_valid |= ATTR_CTIME_SET;
1430         }
1431         if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1432             (attr->ia_valid & ATTR_ATIME)) {
1433                 attr->ia_atime = CFS_CURRENT_TIME;
1434                 attr->ia_valid |= ATTR_ATIME_SET;
1435         }
1436         if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1437             (attr->ia_valid & ATTR_MTIME)) {
1438                 attr->ia_mtime = CFS_CURRENT_TIME;
1439                 attr->ia_valid |= ATTR_MTIME_SET;
1440         }
1441
1442         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1443                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %lu\n",
1444                        LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1445                        cfs_time_current_sec());
1446
1447         /* If we are changing file size, file content is modified, flag it. */
1448         if (attr->ia_valid & ATTR_SIZE) {
1449                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1450                 spin_lock(&lli->lli_lock);
1451                 lli->lli_flags |= LLIF_DATA_MODIFIED;
1452                 spin_unlock(&lli->lli_lock);
1453         }
1454
1455         /* We always do an MDS RPC, even if we're only changing the size;
1456          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1457
1458         OBD_ALLOC_PTR(op_data);
1459         if (op_data == NULL)
1460                 RETURN(-ENOMEM);
1461
1462         if (!S_ISDIR(inode->i_mode)) {
1463                 if (attr->ia_valid & ATTR_SIZE)
1464                         inode_dio_write_done(inode);
1465                 mutex_unlock(&inode->i_mutex);
1466                 down_write(&lli->lli_trunc_sem);
1467         }
1468
1469         memcpy(&op_data->op_attr, attr, sizeof(*attr));
1470
1471         /* Open epoch for truncate. */
1472         if (exp_connect_som(ll_i2mdexp(inode)) &&
1473             (attr->ia_valid & (ATTR_SIZE | ATTR_MTIME | ATTR_MTIME_SET)))
1474                 op_data->op_flags = MF_EPOCH_OPEN;
1475
1476         rc = ll_md_setattr(dentry, op_data, &mod);
1477         if (rc)
1478                 GOTO(out, rc);
1479
1480         /* RPC to MDT is sent, cancel data modification flag */
1481         if (rc == 0 && (op_data->op_bias & MDS_DATA_MODIFIED)) {
1482                 spin_lock(&lli->lli_lock);
1483                 lli->lli_flags &= ~LLIF_DATA_MODIFIED;
1484                 spin_unlock(&lli->lli_lock);
1485         }
1486
1487         ll_ioepoch_open(lli, op_data->op_ioepoch);
1488         if (!S_ISREG(inode->i_mode))
1489                 GOTO(out, rc = 0);
1490
1491         if (attr->ia_valid & (ATTR_SIZE |
1492                               ATTR_ATIME | ATTR_ATIME_SET |
1493                               ATTR_MTIME | ATTR_MTIME_SET))
1494                 /* For truncate and utimes sending attributes to OSTs, setting
1495                  * mtime/atime to the past will be performed under PW [0:EOF]
1496                  * extent lock (new_size:EOF for truncate).  It may seem
1497                  * excessive to send mtime/atime updates to OSTs when not
1498                  * setting times to past, but it is necessary due to possible
1499                  * time de-synchronization between MDT inode and OST objects */
1500                 rc = ll_setattr_ost(inode, attr);
1501         EXIT;
1502 out:
1503         if (op_data) {
1504                 if (op_data->op_ioepoch) {
1505                         rc1 = ll_setattr_done_writing(inode, op_data, mod);
1506                         if (!rc)
1507                                 rc = rc1;
1508                 }
1509                 ll_finish_md_op_data(op_data);
1510         }
1511         if (!S_ISDIR(inode->i_mode)) {
1512                 up_write(&lli->lli_trunc_sem);
1513                 mutex_lock(&inode->i_mutex);
1514                 if (attr->ia_valid & ATTR_SIZE)
1515                         inode_dio_wait(inode);
1516         }
1517
1518         ll_stats_ops_tally(ll_i2sbi(inode), (attr->ia_valid & ATTR_SIZE) ?
1519                         LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1520
1521         return rc;
1522 }
1523
1524 int ll_setattr(struct dentry *de, struct iattr *attr)
1525 {
1526         int mode = de->d_inode->i_mode;
1527
1528         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1529                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1530                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1531
1532         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1533                                (ATTR_SIZE|ATTR_MODE)) &&
1534             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1535              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1536               !(attr->ia_mode & S_ISGID))))
1537                 attr->ia_valid |= ATTR_FORCE;
1538
1539         if ((mode & S_ISUID) &&
1540             !(attr->ia_mode & S_ISUID) &&
1541             !(attr->ia_valid & ATTR_KILL_SUID))
1542                 attr->ia_valid |= ATTR_KILL_SUID;
1543
1544         if (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1545             !(attr->ia_mode & S_ISGID) &&
1546             !(attr->ia_valid & ATTR_KILL_SGID))
1547                 attr->ia_valid |= ATTR_KILL_SGID;
1548
1549         return ll_setattr_raw(de, attr);
1550 }
1551
1552 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1553                        __u64 max_age, __u32 flags)
1554 {
1555         struct ll_sb_info *sbi = ll_s2sbi(sb);
1556         struct obd_statfs obd_osfs;
1557         int rc;
1558         ENTRY;
1559
1560         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1561         if (rc) {
1562                 CERROR("md_statfs fails: rc = %d\n", rc);
1563                 RETURN(rc);
1564         }
1565
1566         osfs->os_type = sb->s_magic;
1567
1568         CDEBUG(D_SUPER, "MDC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1569                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,osfs->os_files);
1570
1571         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1572                 flags |= OBD_STATFS_NODELAY;
1573
1574         rc = obd_statfs_rqset(sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1575         if (rc) {
1576                 CERROR("obd_statfs fails: rc = %d\n", rc);
1577                 RETURN(rc);
1578         }
1579
1580         CDEBUG(D_SUPER, "OSC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1581                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1582                obd_osfs.os_files);
1583
1584         osfs->os_bsize = obd_osfs.os_bsize;
1585         osfs->os_blocks = obd_osfs.os_blocks;
1586         osfs->os_bfree = obd_osfs.os_bfree;
1587         osfs->os_bavail = obd_osfs.os_bavail;
1588
1589         /* If we don't have as many objects free on the OST as inodes
1590          * on the MDS, we reduce the total number of inodes to
1591          * compensate, so that the "inodes in use" number is correct.
1592          */
1593         if (obd_osfs.os_ffree < osfs->os_ffree) {
1594                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1595                         obd_osfs.os_ffree;
1596                 osfs->os_ffree = obd_osfs.os_ffree;
1597         }
1598
1599         RETURN(rc);
1600 }
1601 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1602 {
1603         struct super_block *sb = de->d_sb;
1604         struct obd_statfs osfs;
1605         int rc;
1606
1607         CDEBUG(D_VFSTRACE, "VFS Op: at "LPU64" jiffies\n", get_jiffies_64());
1608         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1609
1610         /* Some amount of caching on the client is allowed */
1611         rc = ll_statfs_internal(sb, &osfs,
1612                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1613                                 0);
1614         if (rc)
1615                 return rc;
1616
1617         statfs_unpack(sfs, &osfs);
1618
1619         /* We need to downshift for all 32-bit kernels, because we can't
1620          * tell if the kernel is being called via sys_statfs64() or not.
1621          * Stop before overflowing f_bsize - in which case it is better
1622          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1623         if (sizeof(long) < 8) {
1624                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1625                         sfs->f_bsize <<= 1;
1626
1627                         osfs.os_blocks >>= 1;
1628                         osfs.os_bfree >>= 1;
1629                         osfs.os_bavail >>= 1;
1630                 }
1631         }
1632
1633         sfs->f_blocks = osfs.os_blocks;
1634         sfs->f_bfree = osfs.os_bfree;
1635         sfs->f_bavail = osfs.os_bavail;
1636         sfs->f_fsid = ll_s2sbi(sb)->ll_fsid;
1637         return 0;
1638 }
1639
1640 void ll_inode_size_lock(struct inode *inode)
1641 {
1642         struct ll_inode_info *lli;
1643
1644         LASSERT(!S_ISDIR(inode->i_mode));
1645
1646         lli = ll_i2info(inode);
1647         LASSERT(lli->lli_size_sem_owner != current);
1648         down(&lli->lli_size_sem);
1649         LASSERT(lli->lli_size_sem_owner == NULL);
1650         lli->lli_size_sem_owner = current;
1651 }
1652
1653 void ll_inode_size_unlock(struct inode *inode)
1654 {
1655         struct ll_inode_info *lli;
1656
1657         lli = ll_i2info(inode);
1658         LASSERT(lli->lli_size_sem_owner == current);
1659         lli->lli_size_sem_owner = NULL;
1660         up(&lli->lli_size_sem);
1661 }
1662
1663 void ll_update_inode(struct inode *inode, struct lustre_md *md)
1664 {
1665         struct ll_inode_info *lli = ll_i2info(inode);
1666         struct mdt_body *body = md->body;
1667         struct lov_stripe_md *lsm = md->lsm;
1668         struct ll_sb_info *sbi = ll_i2sbi(inode);
1669
1670         LASSERT ((lsm != NULL) == ((body->valid & OBD_MD_FLEASIZE) != 0));
1671         if (lsm != NULL) {
1672                 if (!lli->lli_has_smd &&
1673                     !(sbi->ll_flags & LL_SBI_LAYOUT_LOCK))
1674                         cl_file_inode_init(inode, md);
1675
1676                 lli->lli_maxbytes = lsm->lsm_maxbytes;
1677                 if (lli->lli_maxbytes > MAX_LFS_FILESIZE)
1678                         lli->lli_maxbytes = MAX_LFS_FILESIZE;
1679         }
1680
1681         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1682                 if (body->valid & OBD_MD_FLRMTPERM)
1683                         ll_update_remote_perm(inode, md->remote_perm);
1684         }
1685 #ifdef CONFIG_FS_POSIX_ACL
1686         else if (body->valid & OBD_MD_FLACL) {
1687                 spin_lock(&lli->lli_lock);
1688                 if (lli->lli_posix_acl)
1689                         posix_acl_release(lli->lli_posix_acl);
1690                 lli->lli_posix_acl = md->posix_acl;
1691                 spin_unlock(&lli->lli_lock);
1692         }
1693 #endif
1694         inode->i_ino = cl_fid_build_ino(&body->fid1,
1695                                         sbi->ll_flags & LL_SBI_32BIT_API);
1696         inode->i_generation = cl_fid_build_gen(&body->fid1);
1697
1698         if (body->valid & OBD_MD_FLATIME) {
1699                 if (body->atime > LTIME_S(inode->i_atime))
1700                         LTIME_S(inode->i_atime) = body->atime;
1701                 lli->lli_lvb.lvb_atime = body->atime;
1702         }
1703         if (body->valid & OBD_MD_FLMTIME) {
1704                 if (body->mtime > LTIME_S(inode->i_mtime)) {
1705                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
1706                                "to "LPU64"\n", inode->i_ino,
1707                                LTIME_S(inode->i_mtime), body->mtime);
1708                         LTIME_S(inode->i_mtime) = body->mtime;
1709                 }
1710                 lli->lli_lvb.lvb_mtime = body->mtime;
1711         }
1712         if (body->valid & OBD_MD_FLCTIME) {
1713                 if (body->ctime > LTIME_S(inode->i_ctime))
1714                         LTIME_S(inode->i_ctime) = body->ctime;
1715                 lli->lli_lvb.lvb_ctime = body->ctime;
1716         }
1717         if (body->valid & OBD_MD_FLMODE)
1718                 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
1719         if (body->valid & OBD_MD_FLTYPE)
1720                 inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
1721         LASSERT(inode->i_mode != 0);
1722         if (S_ISREG(inode->i_mode)) {
1723                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1, LL_MAX_BLKSIZE_BITS);
1724         } else {
1725                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1726         }
1727         if (body->valid & OBD_MD_FLUID)
1728                 inode->i_uid = body->uid;
1729         if (body->valid & OBD_MD_FLGID)
1730                 inode->i_gid = body->gid;
1731         if (body->valid & OBD_MD_FLFLAGS)
1732                 inode->i_flags = ll_ext_to_inode_flags(body->flags);
1733         if (body->valid & OBD_MD_FLNLINK)
1734                 set_nlink(inode, body->nlink);
1735         if (body->valid & OBD_MD_FLRDEV)
1736                 inode->i_rdev = old_decode_dev(body->rdev);
1737
1738         if (body->valid & OBD_MD_FLID) {
1739                 /* FID shouldn't be changed! */
1740                 if (fid_is_sane(&lli->lli_fid)) {
1741                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->fid1),
1742                                  "Trying to change FID "DFID
1743                                  " to the "DFID", inode %lu/%u(%p)\n",
1744                                  PFID(&lli->lli_fid), PFID(&body->fid1),
1745                                  inode->i_ino, inode->i_generation, inode);
1746                 } else
1747                         lli->lli_fid = body->fid1;
1748         }
1749
1750         LASSERT(fid_seq(&lli->lli_fid) != 0);
1751
1752         if (body->valid & OBD_MD_FLSIZE) {
1753                 if (exp_connect_som(ll_i2mdexp(inode)) &&
1754                     S_ISREG(inode->i_mode)) {
1755                         struct lustre_handle lockh;
1756                         ldlm_mode_t mode;
1757
1758                         /* As it is possible a blocking ast has been processed
1759                          * by this time, we need to check there is an UPDATE
1760                          * lock on the client and set LLIF_MDS_SIZE_LOCK holding
1761                          * it. */
1762                         mode = ll_take_md_lock(inode, MDS_INODELOCK_UPDATE,
1763                                                &lockh, LDLM_FL_CBPENDING);
1764                         if (mode) {
1765                                 if (lli->lli_flags & (LLIF_DONE_WRITING |
1766                                                       LLIF_EPOCH_PENDING |
1767                                                       LLIF_SOM_DIRTY)) {
1768                                         CERROR("ino %lu flags %u still has "
1769                                                "size authority! do not trust "
1770                                                "the size got from MDS\n",
1771                                                inode->i_ino, lli->lli_flags);
1772                                 } else {
1773                                         /* Use old size assignment to avoid
1774                                          * deadlock bz14138 & bz14326 */
1775                                         i_size_write(inode, body->size);
1776                                         spin_lock(&lli->lli_lock);
1777                                         lli->lli_flags |= LLIF_MDS_SIZE_LOCK;
1778                                         spin_unlock(&lli->lli_lock);
1779                                 }
1780                                 ldlm_lock_decref(&lockh, mode);
1781                         }
1782                 } else {
1783                         /* Use old size assignment to avoid
1784                          * deadlock bz14138 & bz14326 */
1785                         i_size_write(inode, body->size);
1786
1787                         CDEBUG(D_VFSTRACE, "inode=%lu, updating i_size %llu\n",
1788                                inode->i_ino, (unsigned long long)body->size);
1789                 }
1790
1791                 if (body->valid & OBD_MD_FLBLOCKS)
1792                         inode->i_blocks = body->blocks;
1793         }
1794
1795         if (body->valid & OBD_MD_FLMDSCAPA) {
1796                 LASSERT(md->mds_capa);
1797                 ll_add_capa(inode, md->mds_capa);
1798         }
1799         if (body->valid & OBD_MD_FLOSSCAPA) {
1800                 LASSERT(md->oss_capa);
1801                 ll_add_capa(inode, md->oss_capa);
1802         }
1803 }
1804
1805 void ll_read_inode2(struct inode *inode, void *opaque)
1806 {
1807         struct lustre_md *md = opaque;
1808         struct ll_inode_info *lli = ll_i2info(inode);
1809         ENTRY;
1810
1811         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1812                PFID(&lli->lli_fid), inode);
1813
1814         LASSERT(!lli->lli_has_smd);
1815
1816         /* Core attributes from the MDS first.  This is a new inode, and
1817          * the VFS doesn't zero times in the core inode so we have to do
1818          * it ourselves.  They will be overwritten by either MDS or OST
1819          * attributes - we just need to make sure they aren't newer. */
1820         LTIME_S(inode->i_mtime) = 0;
1821         LTIME_S(inode->i_atime) = 0;
1822         LTIME_S(inode->i_ctime) = 0;
1823         inode->i_rdev = 0;
1824         ll_update_inode(inode, md);
1825
1826         /* OIDEBUG(inode); */
1827
1828         /* initializing backing dev info. */
1829         inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
1830
1831
1832         if (S_ISREG(inode->i_mode)) {
1833                 struct ll_sb_info *sbi = ll_i2sbi(inode);
1834                 inode->i_op = &ll_file_inode_operations;
1835                 inode->i_fop = sbi->ll_fop;
1836                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
1837                 EXIT;
1838         } else if (S_ISDIR(inode->i_mode)) {
1839                 inode->i_op = &ll_dir_inode_operations;
1840                 inode->i_fop = &ll_dir_operations;
1841                 EXIT;
1842         } else if (S_ISLNK(inode->i_mode)) {
1843                 inode->i_op = &ll_fast_symlink_inode_operations;
1844                 EXIT;
1845         } else {
1846                 inode->i_op = &ll_special_inode_operations;
1847
1848                 init_special_inode(inode, inode->i_mode,
1849                                    inode->i_rdev);
1850
1851                 EXIT;
1852         }
1853 }
1854
1855 void ll_delete_inode(struct inode *inode)
1856 {
1857         struct cl_inode_info *lli = cl_i2info(inode);
1858         ENTRY;
1859
1860         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
1861                 /* discard all dirty pages before truncating them, required by
1862                  * osc_extent implementation at LU-1030. */
1863                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF,
1864                                    CL_FSYNC_DISCARD, 1);
1865
1866         truncate_inode_pages(&inode->i_data, 0);
1867
1868         /* Workaround for LU-118 */
1869         if (inode->i_data.nrpages) {
1870                 TREE_READ_LOCK_IRQ(&inode->i_data);
1871                 TREE_READ_UNLOCK_IRQ(&inode->i_data);
1872                 LASSERTF(inode->i_data.nrpages == 0,
1873                          "inode=%lu/%u(%p) nrpages=%lu, see "
1874                          "http://jira.whamcloud.com/browse/LU-118\n",
1875                          inode->i_ino, inode->i_generation, inode,
1876                          inode->i_data.nrpages);
1877         }
1878         /* Workaround end */
1879
1880 #ifdef HAVE_SBOPS_EVICT_INODE
1881         ll_clear_inode(inode);
1882 #endif
1883         clear_inode(inode);
1884
1885         EXIT;
1886 }
1887
1888 int ll_iocontrol(struct inode *inode, struct file *file,
1889                  unsigned int cmd, unsigned long arg)
1890 {
1891         struct ll_sb_info *sbi = ll_i2sbi(inode);
1892         struct ptlrpc_request *req = NULL;
1893         int rc, flags = 0;
1894         ENTRY;
1895
1896         switch(cmd) {
1897         case FSFILT_IOC_GETFLAGS: {
1898                 struct mdt_body *body;
1899                 struct md_op_data *op_data;
1900
1901                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
1902                                              0, 0, LUSTRE_OPC_ANY,
1903                                              NULL);
1904                 if (IS_ERR(op_data))
1905                         RETURN(PTR_ERR(op_data));
1906
1907                 op_data->op_valid = OBD_MD_FLFLAGS;
1908                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
1909                 ll_finish_md_op_data(op_data);
1910                 if (rc) {
1911                         CERROR("failure %d inode %lu\n", rc, inode->i_ino);
1912                         RETURN(-abs(rc));
1913                 }
1914
1915                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1916
1917                 flags = body->flags;
1918
1919                 ptlrpc_req_finished(req);
1920
1921                 RETURN(put_user(flags, (int *)arg));
1922         }
1923         case FSFILT_IOC_SETFLAGS: {
1924                 struct lov_stripe_md *lsm;
1925                 struct obd_info oinfo = { { { 0 } } };
1926                 struct md_op_data *op_data;
1927
1928                 if (get_user(flags, (int *)arg))
1929                         RETURN(-EFAULT);
1930
1931                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
1932                                              LUSTRE_OPC_ANY, NULL);
1933                 if (IS_ERR(op_data))
1934                         RETURN(PTR_ERR(op_data));
1935
1936                 ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags = flags;
1937                 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
1938                 rc = md_setattr(sbi->ll_md_exp, op_data,
1939                                 NULL, 0, NULL, 0, &req, NULL);
1940                 ll_finish_md_op_data(op_data);
1941                 ptlrpc_req_finished(req);
1942                 if (rc)
1943                         RETURN(rc);
1944
1945                 inode->i_flags = ll_ext_to_inode_flags(flags);
1946
1947                 lsm = ccc_inode_lsm_get(inode);
1948                 if (!lsm_has_objects(lsm)) {
1949                         ccc_inode_lsm_put(inode, lsm);
1950                         RETURN(0);
1951                 }
1952
1953                 OBDO_ALLOC(oinfo.oi_oa);
1954                 if (!oinfo.oi_oa) {
1955                         ccc_inode_lsm_put(inode, lsm);
1956                         RETURN(-ENOMEM);
1957                 }
1958                 oinfo.oi_md = lsm;
1959                 oinfo.oi_oa->o_oi = lsm->lsm_oi;
1960                 oinfo.oi_oa->o_flags = flags;
1961                 oinfo.oi_oa->o_valid = OBD_MD_FLID | OBD_MD_FLFLAGS |
1962                                        OBD_MD_FLGROUP;
1963                 oinfo.oi_capa = ll_mdscapa_get(inode);
1964                 obdo_set_parent_fid(oinfo.oi_oa, &ll_i2info(inode)->lli_fid);
1965                 rc = obd_setattr_rqset(sbi->ll_dt_exp, &oinfo, NULL);
1966                 capa_put(oinfo.oi_capa);
1967                 OBDO_FREE(oinfo.oi_oa);
1968                 ccc_inode_lsm_put(inode, lsm);
1969
1970                 if (rc && rc != -EPERM && rc != -EACCES)
1971                         CERROR("osc_setattr_async fails: rc = %d\n", rc);
1972
1973                 RETURN(rc);
1974         }
1975         default:
1976                 RETURN(-ENOSYS);
1977         }
1978
1979         RETURN(0);
1980 }
1981
1982 int ll_flush_ctx(struct inode *inode)
1983 {
1984         struct ll_sb_info  *sbi = ll_i2sbi(inode);
1985
1986         CDEBUG(D_SEC, "flush context for user %d\n", cfs_curproc_uid());
1987
1988         obd_set_info_async(NULL, sbi->ll_md_exp,
1989                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
1990                            0, NULL, NULL);
1991         obd_set_info_async(NULL, sbi->ll_dt_exp,
1992                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
1993                            0, NULL, NULL);
1994         return 0;
1995 }
1996
1997 /* umount -f client means force down, don't save state */
1998 void ll_umount_begin(struct super_block *sb)
1999 {
2000         struct ll_sb_info *sbi = ll_s2sbi(sb);
2001         struct obd_device *obd;
2002         struct obd_ioctl_data *ioc_data;
2003         ENTRY;
2004
2005         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2006                sb->s_count, atomic_read(&sb->s_active));
2007
2008         obd = class_exp2obd(sbi->ll_md_exp);
2009         if (obd == NULL) {
2010                 CERROR("Invalid MDC connection handle "LPX64"\n",
2011                        sbi->ll_md_exp->exp_handle.h_cookie);
2012                 EXIT;
2013                 return;
2014         }
2015         obd->obd_force = 1;
2016
2017         obd = class_exp2obd(sbi->ll_dt_exp);
2018         if (obd == NULL) {
2019                 CERROR("Invalid LOV connection handle "LPX64"\n",
2020                        sbi->ll_dt_exp->exp_handle.h_cookie);
2021                 EXIT;
2022                 return;
2023         }
2024         obd->obd_force = 1;
2025
2026         OBD_ALLOC_PTR(ioc_data);
2027         if (ioc_data) {
2028                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2029                               sizeof *ioc_data, ioc_data, NULL);
2030
2031                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2032                               sizeof *ioc_data, ioc_data, NULL);
2033
2034                 OBD_FREE_PTR(ioc_data);
2035         }
2036
2037         /* Really, we'd like to wait until there are no requests outstanding,
2038          * and then continue.  For now, we just invalidate the requests,
2039          * schedule() and sleep one second if needed, and hope.
2040          */
2041         cfs_schedule();
2042         EXIT;
2043 }
2044
2045 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2046 {
2047         struct ll_sb_info *sbi = ll_s2sbi(sb);
2048         char *profilenm = get_profile_name(sb);
2049         int err;
2050         __u32 read_only;
2051
2052         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2053                 read_only = *flags & MS_RDONLY;
2054                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2055                                          sizeof(KEY_READ_ONLY),
2056                                          KEY_READ_ONLY, sizeof(read_only),
2057                                          &read_only, NULL);
2058                 if (err) {
2059                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2060                                       profilenm, read_only ?
2061                                       "read-only" : "read-write", err);
2062                         return err;
2063                 }
2064
2065                 if (read_only)
2066                         sb->s_flags |= MS_RDONLY;
2067                 else
2068                         sb->s_flags &= ~MS_RDONLY;
2069
2070                 if (sbi->ll_flags & LL_SBI_VERBOSE)
2071                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2072                                       read_only ?  "read-only" : "read-write");
2073         }
2074         return 0;
2075 }
2076
2077 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2078                   struct super_block *sb, struct lookup_intent *it)
2079 {
2080         struct ll_sb_info *sbi = NULL;
2081         struct lustre_md md;
2082         int rc;
2083         ENTRY;
2084
2085         LASSERT(*inode || sb);
2086         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2087         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2088                               sbi->ll_md_exp, &md);
2089         if (rc)
2090                 RETURN(rc);
2091
2092         if (*inode) {
2093                 ll_update_inode(*inode, &md);
2094         } else {
2095                 LASSERT(sb != NULL);
2096
2097                 /*
2098                  * At this point server returns to client's same fid as client
2099                  * generated for creating. So using ->fid1 is okay here.
2100                  */
2101                 LASSERT(fid_is_sane(&md.body->fid1));
2102
2103                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->fid1,
2104                                              sbi->ll_flags & LL_SBI_32BIT_API),
2105                                  &md);
2106                 if (*inode == NULL || IS_ERR(*inode)) {
2107 #ifdef CONFIG_FS_POSIX_ACL
2108                         if (md.posix_acl) {
2109                                 posix_acl_release(md.posix_acl);
2110                                 md.posix_acl = NULL;
2111                         }
2112 #endif
2113                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2114                         *inode = NULL;
2115                         CERROR("new_inode -fatal: rc %d\n", rc);
2116                         GOTO(out, rc);
2117                 }
2118         }
2119
2120         /* Handling piggyback layout lock.
2121          * Layout lock can be piggybacked by getattr and open request.
2122          * The lsm can be applied to inode only if it comes with a layout lock
2123          * otherwise correct layout may be overwritten, for example:
2124          * 1. proc1: mdt returns a lsm but not granting layout
2125          * 2. layout was changed by another client
2126          * 3. proc2: refresh layout and layout lock granted
2127          * 4. proc1: to apply a stale layout */
2128         if (it != NULL && it->d.lustre.it_lock_mode != 0) {
2129                 struct lustre_handle lockh;
2130                 struct ldlm_lock *lock;
2131
2132                 lockh.cookie = it->d.lustre.it_lock_handle;
2133                 lock = ldlm_handle2lock(&lockh);
2134                 LASSERT(lock != NULL);
2135                 if (ldlm_has_layout(lock)) {
2136                         struct cl_object_conf conf;
2137
2138                         memset(&conf, 0, sizeof(conf));
2139                         conf.coc_opc = OBJECT_CONF_SET;
2140                         conf.coc_inode = *inode;
2141                         conf.coc_lock = lock;
2142                         conf.u.coc_md = &md;
2143                         (void)ll_layout_conf(*inode, &conf);
2144                 }
2145                 LDLM_LOCK_PUT(lock);
2146         }
2147
2148 out:
2149         if (md.lsm != NULL)
2150                 obd_free_memmd(sbi->ll_dt_exp, &md.lsm);
2151         md_free_lustre_md(sbi->ll_md_exp, &md);
2152         RETURN(rc);
2153 }
2154
2155 int ll_obd_statfs(struct inode *inode, void *arg)
2156 {
2157         struct ll_sb_info *sbi = NULL;
2158         struct obd_export *exp;
2159         char *buf = NULL;
2160         struct obd_ioctl_data *data = NULL;
2161         __u32 type;
2162         __u32 flags;
2163         int len = 0, rc;
2164
2165         if (!inode || !(sbi = ll_i2sbi(inode)))
2166                 GOTO(out_statfs, rc = -EINVAL);
2167
2168         rc = obd_ioctl_getdata(&buf, &len, arg);
2169         if (rc)
2170                 GOTO(out_statfs, rc);
2171
2172         data = (void*)buf;
2173         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2174             !data->ioc_pbuf1 || !data->ioc_pbuf2)
2175                 GOTO(out_statfs, rc = -EINVAL);
2176
2177         if (data->ioc_inllen1 != sizeof(__u32) ||
2178             data->ioc_inllen2 != sizeof(__u32) ||
2179             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2180             data->ioc_plen2 != sizeof(struct obd_uuid))
2181                 GOTO(out_statfs, rc = -EINVAL);
2182
2183         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2184         if (type & LL_STATFS_LMV)
2185                 exp = sbi->ll_md_exp;
2186         else if (type & LL_STATFS_LOV)
2187                 exp = sbi->ll_dt_exp;
2188         else
2189                 GOTO(out_statfs, rc = -ENODEV);
2190
2191         flags = (type & LL_STATFS_NODELAY) ? OBD_STATFS_NODELAY : 0;
2192         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, &flags);
2193         if (rc)
2194                 GOTO(out_statfs, rc);
2195 out_statfs:
2196         if (buf)
2197                 obd_ioctl_freedata(buf, len);
2198         return rc;
2199 }
2200
2201 int ll_process_config(struct lustre_cfg *lcfg)
2202 {
2203         char *ptr;
2204         void *sb;
2205         struct lprocfs_static_vars lvars;
2206         unsigned long x;
2207         int rc = 0;
2208
2209         lprocfs_llite_init_vars(&lvars);
2210
2211         /* The instance name contains the sb: lustre-client-aacfe000 */
2212         ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2213         if (!ptr || !*(++ptr))
2214                 return -EINVAL;
2215         if (sscanf(ptr, "%lx", &x) != 1)
2216                 return -EINVAL;
2217         sb = (void *)x;
2218         /* This better be a real Lustre superblock! */
2219         LASSERT(s2lsi((struct super_block *)sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2220
2221         /* Note we have not called client_common_fill_super yet, so
2222            proc fns must be able to handle that! */
2223         rc = class_process_proc_param(PARAM_LLITE, lvars.obd_vars,
2224                                       lcfg, sb);
2225         if (rc > 0)
2226                 rc = 0;
2227         return(rc);
2228 }
2229
2230 /* this function prepares md_op_data hint for passing ot down to MD stack. */
2231 struct md_op_data * ll_prep_md_op_data(struct md_op_data *op_data,
2232                                        struct inode *i1, struct inode *i2,
2233                                        const char *name, int namelen,
2234                                        int mode, __u32 opc, void *data)
2235 {
2236         LASSERT(i1 != NULL);
2237
2238         if (namelen > ll_i2sbi(i1)->ll_namelen)
2239                 return ERR_PTR(-ENAMETOOLONG);
2240
2241         if (op_data == NULL)
2242                 OBD_ALLOC_PTR(op_data);
2243
2244         if (op_data == NULL)
2245                 return ERR_PTR(-ENOMEM);
2246
2247         ll_i2gids(op_data->op_suppgids, i1, i2);
2248         op_data->op_fid1 = *ll_inode2fid(i1);
2249         op_data->op_capa1 = ll_mdscapa_get(i1);
2250
2251         if (i2) {
2252                 op_data->op_fid2 = *ll_inode2fid(i2);
2253                 op_data->op_capa2 = ll_mdscapa_get(i2);
2254         } else {
2255                 fid_zero(&op_data->op_fid2);
2256                 op_data->op_capa2 = NULL;
2257         }
2258
2259         op_data->op_name = name;
2260         op_data->op_namelen = namelen;
2261         op_data->op_mode = mode;
2262         op_data->op_mod_time = cfs_time_current_sec();
2263         op_data->op_fsuid = cfs_curproc_fsuid();
2264         op_data->op_fsgid = cfs_curproc_fsgid();
2265         op_data->op_cap = cfs_curproc_cap_pack();
2266         op_data->op_bias = 0;
2267         op_data->op_cli_flags = 0;
2268         if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2269              filename_is_volatile(name, namelen, NULL))
2270                 op_data->op_bias |= MDS_CREATE_VOLATILE;
2271         op_data->op_opc = opc;
2272         op_data->op_mds = 0;
2273         op_data->op_data = data;
2274
2275         /* If the file is being opened after mknod() (normally due to NFS)
2276          * try to use the default stripe data from parent directory for
2277          * allocating OST objects.  Try to pass the parent FID to MDS. */
2278         if (opc == LUSTRE_OPC_CREATE && i1 == i2 && S_ISREG(i2->i_mode) &&
2279             !ll_i2info(i2)->lli_has_smd) {
2280                 struct ll_inode_info *lli = ll_i2info(i2);
2281
2282                 spin_lock(&lli->lli_lock);
2283                 if (likely(!lli->lli_has_smd && !fid_is_zero(&lli->lli_pfid)))
2284                         op_data->op_fid1 = lli->lli_pfid;
2285                 spin_unlock(&lli->lli_lock);
2286                 /** We ignore parent's capability temporary. */
2287         }
2288
2289         /* When called by ll_setattr_raw, file is i1. */
2290         if (LLIF_DATA_MODIFIED & ll_i2info(i1)->lli_flags)
2291                 op_data->op_bias |= MDS_DATA_MODIFIED;
2292
2293         return op_data;
2294 }
2295
2296 void ll_finish_md_op_data(struct md_op_data *op_data)
2297 {
2298         capa_put(op_data->op_capa1);
2299         capa_put(op_data->op_capa2);
2300         OBD_FREE_PTR(op_data);
2301 }
2302
2303 #ifdef HAVE_SUPEROPS_USE_DENTRY
2304 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2305 #else
2306 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
2307 #endif
2308 {
2309         struct ll_sb_info *sbi;
2310
2311 #ifdef HAVE_SUPEROPS_USE_DENTRY
2312         LASSERT((seq != NULL) && (dentry != NULL));
2313         sbi = ll_s2sbi(dentry->d_sb);
2314 #else
2315         LASSERT((seq != NULL) && (vfs != NULL));
2316         sbi = ll_s2sbi(vfs->mnt_sb);
2317 #endif
2318
2319         if (sbi->ll_flags & LL_SBI_NOLCK)
2320                 seq_puts(seq, ",nolock");
2321
2322         if (sbi->ll_flags & LL_SBI_FLOCK)
2323                 seq_puts(seq, ",flock");
2324
2325         if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2326                 seq_puts(seq, ",localflock");
2327
2328         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2329                 seq_puts(seq, ",user_xattr");
2330
2331         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2332                 seq_puts(seq, ",lazystatfs");
2333
2334         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2335                 seq_puts(seq, ",user_fid2path");
2336
2337         RETURN(0);
2338 }
2339
2340 /**
2341  * Get obd name by cmd, and copy out to user space
2342  */
2343 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2344 {
2345         struct ll_sb_info *sbi = ll_i2sbi(inode);
2346         struct obd_device *obd;
2347         ENTRY;
2348
2349         if (cmd == OBD_IOC_GETDTNAME)
2350                 obd = class_exp2obd(sbi->ll_dt_exp);
2351         else if (cmd == OBD_IOC_GETMDNAME)
2352                 obd = class_exp2obd(sbi->ll_md_exp);
2353         else
2354                 RETURN(-EINVAL);
2355
2356         if (!obd)
2357                 RETURN(-ENOENT);
2358
2359         if (copy_to_user((void *)arg, obd->obd_name,
2360                          strlen(obd->obd_name) + 1))
2361                 RETURN(-EFAULT);
2362
2363         RETURN(0);
2364 }
2365
2366 /**
2367  * Get lustre file system name by \a sbi. If \a buf is provided(non-NULL), the
2368  * fsname will be returned in this buffer; otherwise, a static buffer will be
2369  * used to store the fsname and returned to caller.
2370  */
2371 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
2372 {
2373         static char fsname_static[MTI_NAME_MAXLEN];
2374         struct lustre_sb_info *lsi = s2lsi(sb);
2375         char *ptr;
2376         int len;
2377
2378         if (buf == NULL) {
2379                 /* this means the caller wants to use static buffer
2380                  * and it doesn't care about race. Usually this is
2381                  * in error reporting path */
2382                 buf = fsname_static;
2383                 buflen = sizeof(fsname_static);
2384         }
2385
2386         len = strlen(lsi->lsi_lmd->lmd_profile);
2387         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
2388         if (ptr && (strcmp(ptr, "-client") == 0))
2389                 len -= 7;
2390
2391         if (unlikely(len >= buflen))
2392                 len = buflen - 1;
2393         strncpy(buf, lsi->lsi_lmd->lmd_profile, len);
2394         buf[len] = '\0';
2395
2396         return buf;
2397 }
2398
2399 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
2400 {
2401         char *path = NULL;
2402
2403 #ifdef HAVE_FS_STRUCT_USE_PATH
2404         struct path p;
2405
2406         p.dentry = dentry;
2407         p.mnt = current->fs->root.mnt;
2408         path_get(&p);
2409         path = d_path(&p, buf, bufsize);
2410         path_put(&p);
2411 #else
2412         path = d_path(dentry, current->fs->rootmnt, buf, bufsize);
2413 #endif
2414
2415         return path;
2416 }
2417
2418 void ll_dirty_page_discard_warn(struct page *page, int ioret)
2419 {
2420         char *buf, *path = NULL;
2421         struct dentry *dentry = NULL;
2422         struct ccc_object *obj = cl_inode2ccc(page->mapping->host);
2423
2424         /* this can be called inside spin lock so use GFP_ATOMIC. */
2425         buf = (char *)__get_free_page(GFP_ATOMIC);
2426         if (buf != NULL) {
2427                 dentry = d_find_alias(page->mapping->host);
2428                 if (dentry != NULL)
2429                         path = ll_d_path(dentry, buf, PAGE_SIZE);
2430         }
2431
2432         CWARN("%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
2433               "(rc %d)\n", ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
2434               s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2435               PFID(&obj->cob_header.coh_lu.loh_fid),
2436               (path && !IS_ERR(path)) ? path : "", ioret);
2437
2438         if (dentry != NULL)
2439                 dput(dentry);
2440
2441         if (buf != NULL)
2442                 free_page((unsigned long)buf);
2443 }