Whamcloud - gitweb
LU-744 llite: reimplement ll_get_fsname()
[fs/lustre-release.git] / lustre / llite / llite_lib.c
1 /*
2  * GPL HEADER START
3  *
4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License version 2 only,
8  * as published by the Free Software Foundation.
9  *
10  * This program is distributed in the hope that it will be useful, but
11  * WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13  * General Public License version 2 for more details (a copy is included
14  * in the LICENSE file that accompanied this code).
15  *
16  * You should have received a copy of the GNU General Public License
17  * version 2 along with this program; If not, see
18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
19  *
20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21  * CA 95054 USA or visit www.sun.com if you need additional information or
22  * have any questions.
23  *
24  * GPL HEADER END
25  */
26 /*
27  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
28  * Use is subject to license terms.
29  *
30  * Copyright (c) 2011, 2012, Whamcloud, Inc.
31  */
32 /*
33  * This file is part of Lustre, http://www.lustre.org/
34  * Lustre is a trademark of Sun Microsystems, Inc.
35  *
36  * lustre/llite/llite_lib.c
37  *
38  * Lustre Light Super operations
39  */
40
41 #define DEBUG_SUBSYSTEM S_LLITE
42
43 #include <linux/module.h>
44 #include <linux/types.h>
45 #include <linux/version.h>
46 #include <linux/mm.h>
47
48 #include <lustre_lite.h>
49 #include <lustre_ha.h>
50 #include <lustre_dlm.h>
51 #include <lprocfs_status.h>
52 #include <lustre_disk.h>
53 #include <lustre_param.h>
54 #include <lustre_log.h>
55 #include <cl_object.h>
56 #include <obd_cksum.h>
57 #include "llite_internal.h"
58
59 cfs_mem_cache_t *ll_file_data_slab;
60
61 CFS_LIST_HEAD(ll_super_blocks);
62 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) cfs_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         struct sysinfo si;
79         class_uuid_t uuid;
80         int i;
81         ENTRY;
82
83         OBD_ALLOC(sbi, sizeof(*sbi));
84         if (!sbi)
85                 RETURN(NULL);
86
87         cfs_spin_lock_init(&sbi->ll_lock);
88         cfs_mutex_init(&sbi->ll_lco.lco_lock);
89         cfs_spin_lock_init(&sbi->ll_pp_extent_lock);
90         cfs_spin_lock_init(&sbi->ll_process_lock);
91         sbi->ll_rw_stats_on = 0;
92
93         si_meminfo(&si);
94         pages = si.totalram - si.totalhigh;
95         if (pages >> (20 - CFS_PAGE_SHIFT) < 512) {
96 #ifdef HAVE_BGL_SUPPORT
97                 sbi->ll_async_page_max = pages / 4;
98 #else
99                 sbi->ll_async_page_max = pages / 2;
100 #endif
101         } else {
102                 sbi->ll_async_page_max = (pages / 4) * 3;
103         }
104
105         sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
106                                            SBI_DEFAULT_READAHEAD_MAX);
107         sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
108         sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
109                                            SBI_DEFAULT_READAHEAD_WHOLE_MAX;
110         CFS_INIT_LIST_HEAD(&sbi->ll_conn_chain);
111         CFS_INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list);
112
113         ll_generate_random_uuid(uuid);
114         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
115         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
116
117         cfs_spin_lock(&ll_sb_lock);
118         cfs_list_add_tail(&sbi->ll_list, &ll_super_blocks);
119         cfs_spin_unlock(&ll_sb_lock);
120
121         sbi->ll_flags |= LL_SBI_VERBOSE;
122 #ifdef ENABLE_CHECKSUM
123         sbi->ll_flags |= LL_SBI_CHECKSUM;
124 #endif
125
126 #ifdef HAVE_LRU_RESIZE_SUPPORT
127         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
128 #endif
129
130         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
131                 cfs_spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i]. \
132                                    pp_r_hist.oh_lock);
133                 cfs_spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i]. \
134                                    pp_w_hist.oh_lock);
135         }
136
137         /* metadata statahead is enabled by default */
138         sbi->ll_sa_max = LL_SA_RPC_DEF;
139         cfs_atomic_set(&sbi->ll_sa_total, 0);
140         cfs_atomic_set(&sbi->ll_sa_wrong, 0);
141         cfs_atomic_set(&sbi->ll_agl_total, 0);
142         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
143
144         RETURN(sbi);
145 }
146
147 void ll_free_sbi(struct super_block *sb)
148 {
149         struct ll_sb_info *sbi = ll_s2sbi(sb);
150         ENTRY;
151
152         if (sbi != NULL) {
153                 cfs_spin_lock(&ll_sb_lock);
154                 cfs_list_del(&sbi->ll_list);
155                 cfs_spin_unlock(&ll_sb_lock);
156                 OBD_FREE(sbi, sizeof(*sbi));
157         }
158         EXIT;
159 }
160
161 static struct dentry_operations ll_d_root_ops = {
162         .d_compare = ll_dcompare,
163         .d_revalidate = ll_revalidate_nd,
164 };
165
166 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
167                                     struct vfsmount *mnt)
168 {
169         struct inode *root = 0;
170         struct ll_sb_info *sbi = ll_s2sbi(sb);
171         struct obd_device *obd;
172         struct obd_capa *oc = NULL;
173         struct obd_statfs *osfs = NULL;
174         struct ptlrpc_request *request = NULL;
175         struct obd_connect_data *data = NULL;
176         struct obd_uuid *uuid;
177         struct md_op_data *op_data;
178         struct lustre_md lmd;
179         obd_valid valid;
180         int size, err, checksum;
181         ENTRY;
182
183         obd = class_name2obd(md);
184         if (!obd) {
185                 CERROR("MD %s: not setup or attached\n", md);
186                 RETURN(-EINVAL);
187         }
188
189         OBD_ALLOC_PTR(data);
190         if (data == NULL)
191                 RETURN(-ENOMEM);
192
193         OBD_ALLOC_PTR(osfs);
194         if (osfs == NULL) {
195                 OBD_FREE_PTR(data);
196                 RETURN(-ENOMEM);
197         }
198
199         if (proc_lustre_fs_root) {
200                 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
201                                                   dt, md);
202                 if (err < 0)
203                         CERROR("could not register mount in /proc/fs/lustre\n");
204         }
205
206         /* indicate the features supported by this client */
207         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
208                                   OBD_CONNECT_ATTRFID  |
209                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
210                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
211                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
212                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
213                                   OBD_CONNECT_RMT_CLIENT | OBD_CONNECT_VBR    |
214                                   OBD_CONNECT_FULL20   | OBD_CONNECT_64BITHASH|
215                                   OBD_CONNECT_EINPROGRESS |
216                                   OBD_CONNECT_JOBSTATS;
217
218         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
219                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
220
221 #ifdef HAVE_LRU_RESIZE_SUPPORT
222         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
223                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
224 #endif
225 #ifdef CONFIG_FS_POSIX_ACL
226         data->ocd_connect_flags |= OBD_CONNECT_ACL;
227 #endif
228
229         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
230                 /* flag mdc connection as lightweight, only used for test
231                  * purpose, use with care */
232                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
233
234         data->ocd_ibits_known = MDS_INODELOCK_FULL;
235         data->ocd_version = LUSTRE_VERSION_CODE;
236
237         if (sb->s_flags & MS_RDONLY)
238                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
239         if (sbi->ll_flags & LL_SBI_USER_XATTR)
240                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
241
242 #ifdef HAVE_MS_FLOCK_LOCK
243         /* force vfs to use lustre handler for flock() calls - bug 10743 */
244         sb->s_flags |= MS_FLOCK_LOCK;
245 #endif
246 #ifdef MS_HAS_NEW_AOPS
247         sb->s_flags |= MS_HAS_NEW_AOPS;
248 #endif
249
250         if (sbi->ll_flags & LL_SBI_FLOCK)
251                 sbi->ll_fop = &ll_file_operations_flock;
252         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
253                 sbi->ll_fop = &ll_file_operations;
254         else
255                 sbi->ll_fop = &ll_file_operations_noflock;
256
257         /* real client */
258         data->ocd_connect_flags |= OBD_CONNECT_REAL;
259         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
260                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
261
262         data->ocd_brw_size = PTLRPC_MAX_BRW_SIZE;
263
264         err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid, data, NULL);
265         if (err == -EBUSY) {
266                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
267                                    "recovery, of which this client is not a "
268                                    "part. Please wait for recovery to complete,"
269                                    " abort, or time out.\n", md);
270                 GOTO(out, err);
271         } else if (err) {
272                 CERROR("cannot connect to %s: rc = %d\n", md, err);
273                 GOTO(out, err);
274         }
275
276         err = obd_fid_init(sbi->ll_md_exp);
277         if (err) {
278                 CERROR("Can't init metadata layer FID infrastructure, "
279                        "rc %d\n", err);
280                 GOTO(out_md, err);
281         }
282
283         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
284                          cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS), 0);
285         if (err)
286                 GOTO(out_md_fid, err);
287
288         /* This needs to be after statfs to ensure connect has finished.
289          * Note that "data" does NOT contain the valid connect reply.
290          * If connecting to a 1.8 server there will be no LMV device, so
291          * we can access the MDC export directly and exp_connect_flags will
292          * be non-zero, but if accessing an upgraded 2.1 server it will
293          * have the correct flags filled in.
294          * XXX: fill in the LMV exp_connect_flags from MDC(s). */
295         valid = sbi->ll_md_exp->exp_connect_flags & CLIENT_CONNECT_MDT_REQD;
296         if (sbi->ll_md_exp->exp_connect_flags != 0 &&
297             valid != CLIENT_CONNECT_MDT_REQD) {
298                 char *buf;
299
300                 OBD_ALLOC_WAIT(buf, CFS_PAGE_SIZE);
301                 obd_connect_flags2str(buf, CFS_PAGE_SIZE,
302                                       valid ^ CLIENT_CONNECT_MDT_REQD, ",");
303                 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
304                                    "feature(s) needed for correct operation "
305                                    "of this client (%s). Please upgrade "
306                                    "server or downgrade client.\n",
307                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
308                 OBD_FREE(buf, CFS_PAGE_SIZE);
309                 GOTO(out_md, err = -EPROTO);
310         }
311
312         size = sizeof(*data);
313         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
314                            KEY_CONN_DATA,  &size, data, NULL);
315         if (err) {
316                 CERROR("Get connect data failed: %d \n", err);
317                 GOTO(out_md, err);
318         }
319
320         LASSERT(osfs->os_bsize);
321         sb->s_blocksize = osfs->os_bsize;
322         sb->s_blocksize_bits = log2(osfs->os_bsize);
323         sb->s_magic = LL_SUPER_MAGIC;
324         sb->s_maxbytes = MAX_LFS_FILESIZE;
325         sbi->ll_namelen = osfs->os_namelen;
326         sbi->ll_max_rw_chunk = LL_DEFAULT_MAX_RW_CHUNK;
327
328         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
329             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
330                 LCONSOLE_INFO("Disabling user_xattr feature because "
331                               "it is not supported on the server\n");
332                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
333         }
334
335         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
336 #ifdef MS_POSIXACL
337                 sb->s_flags |= MS_POSIXACL;
338 #endif
339                 sbi->ll_flags |= LL_SBI_ACL;
340         } else {
341                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
342 #ifdef MS_POSIXACL
343                 sb->s_flags &= ~MS_POSIXACL;
344 #endif
345                 sbi->ll_flags &= ~LL_SBI_ACL;
346         }
347
348         if (data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) {
349                 if (!(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
350                         sbi->ll_flags |= LL_SBI_RMT_CLIENT;
351                         LCONSOLE_INFO("client is set as remote by default.\n");
352                 }
353         } else {
354                 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
355                         sbi->ll_flags &= ~LL_SBI_RMT_CLIENT;
356                         LCONSOLE_INFO("client claims to be remote, but server "
357                                       "rejected, forced to be local.\n");
358                 }
359         }
360
361         if (data->ocd_connect_flags & OBD_CONNECT_MDS_CAPA) {
362                 LCONSOLE_INFO("client enabled MDS capability!\n");
363                 sbi->ll_flags |= LL_SBI_MDS_CAPA;
364         }
365
366         if (data->ocd_connect_flags & OBD_CONNECT_OSS_CAPA) {
367                 LCONSOLE_INFO("client enabled OSS capability!\n");
368                 sbi->ll_flags |= LL_SBI_OSS_CAPA;
369         }
370
371         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
372                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
373
374         if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE)
375                 sbi->ll_md_brw_size = data->ocd_brw_size;
376         else
377                 sbi->ll_md_brw_size = CFS_PAGE_SIZE;
378
379         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK) {
380                 LCONSOLE_INFO("Layout lock feature supported.\n");
381                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
382         }
383
384         obd = class_name2obd(dt);
385         if (!obd) {
386                 CERROR("DT %s: not setup or attached\n", dt);
387                 GOTO(out_md_fid, err = -ENODEV);
388         }
389
390         data->ocd_connect_flags = OBD_CONNECT_GRANT     | OBD_CONNECT_VERSION  |
391                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
392                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID      |
393                                   OBD_CONNECT_SRVLOCK   | OBD_CONNECT_TRUNCLOCK|
394                                   OBD_CONNECT_AT | OBD_CONNECT_RMT_CLIENT |
395                                   OBD_CONNECT_OSS_CAPA | OBD_CONNECT_VBR|
396                                   OBD_CONNECT_FULL20 | OBD_CONNECT_64BITHASH |
397                                   OBD_CONNECT_MAXBYTES |
398                                   OBD_CONNECT_EINPROGRESS |
399                                   OBD_CONNECT_JOBSTATS;
400
401         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
402                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
403
404         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_CKSUM)) {
405                 /* OBD_CONNECT_CKSUM should always be set, even if checksums are
406                  * disabled by default, because it can still be enabled on the
407                  * fly via /proc. As a consequence, we still need to come to an
408                  * agreement on the supported algorithms at connect time */
409                 data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
410
411                 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
412                         data->ocd_cksum_types = OBD_CKSUM_ADLER;
413                 else
414                         data->ocd_cksum_types = cksum_types_supported_client();
415         }
416
417 #ifdef HAVE_LRU_RESIZE_SUPPORT
418         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
419 #endif
420         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
421                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
422
423         CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d "
424                "ocd_grant: %d\n", data->ocd_connect_flags,
425                data->ocd_version, data->ocd_grant);
426
427         obd->obd_upcall.onu_owner = &sbi->ll_lco;
428         obd->obd_upcall.onu_upcall = cl_ocd_update;
429
430         data->ocd_brw_size = PTLRPC_MAX_BRW_SIZE;
431
432         err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data, NULL);
433         if (err == -EBUSY) {
434                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
435                                    "recovery, of which this client is not a "
436                                    "part.  Please wait for recovery to "
437                                    "complete, abort, or time out.\n", dt);
438                 GOTO(out_md_fid, err);
439         } else if (err) {
440                 CERROR("Cannot connect to %s: rc = %d\n", dt, err);
441                 GOTO(out_md_fid, err);
442         }
443
444         err = obd_fid_init(sbi->ll_dt_exp);
445         if (err) {
446                 CERROR("Can't init data layer FID infrastructure, "
447                        "rc %d\n", err);
448                 GOTO(out_dt, err);
449         }
450
451         cfs_mutex_lock(&sbi->ll_lco.lco_lock);
452         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
453         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
454         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
455         cfs_mutex_unlock(&sbi->ll_lco.lco_lock);
456
457         fid_zero(&sbi->ll_root_fid);
458         err = md_getstatus(sbi->ll_md_exp, &sbi->ll_root_fid, &oc);
459         if (err) {
460                 CERROR("cannot mds_connect: rc = %d\n", err);
461                 GOTO(out_lock_cn_cb, err);
462         }
463         if (!fid_is_sane(&sbi->ll_root_fid)) {
464                 CERROR("Invalid root fid during mount\n");
465                 GOTO(out_lock_cn_cb, err = -EINVAL);
466         }
467         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
468
469         sb->s_op = &lustre_super_operations;
470 #if THREAD_SIZE >= 8192 /*b=17630*/
471         sb->s_export_op = &lustre_export_operations;
472 #endif
473
474         /* make root inode
475          * XXX: move this to after cbd setup? */
476         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMDSCAPA;
477         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
478                 valid |= OBD_MD_FLRMTPERM;
479         else if (sbi->ll_flags & LL_SBI_ACL)
480                 valid |= OBD_MD_FLACL;
481
482         OBD_ALLOC_PTR(op_data);
483         if (op_data == NULL)
484                 GOTO(out_lock_cn_cb, err = -ENOMEM);
485
486         op_data->op_fid1 = sbi->ll_root_fid;
487         op_data->op_mode = 0;
488         op_data->op_capa1 = oc;
489         op_data->op_valid = valid;
490
491         err = md_getattr(sbi->ll_md_exp, op_data, &request);
492         if (oc)
493                 capa_put(oc);
494         OBD_FREE_PTR(op_data);
495         if (err) {
496                 CERROR("md_getattr failed for root: rc = %d\n", err);
497                 GOTO(out_lock_cn_cb, err);
498         }
499         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
500                                sbi->ll_md_exp, &lmd);
501         if (err) {
502                 CERROR("failed to understand root inode md: rc = %d\n", err);
503                 ptlrpc_req_finished (request);
504                 GOTO(out_lock_cn_cb, err);
505         }
506
507         LASSERT(fid_is_sane(&sbi->ll_root_fid));
508         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid, 0), &lmd);
509         md_free_lustre_md(sbi->ll_md_exp, &lmd);
510         ptlrpc_req_finished(request);
511
512         if (root == NULL || IS_ERR(root)) {
513                 if (lmd.lsm)
514                         obd_free_memmd(sbi->ll_dt_exp, &lmd.lsm);
515 #ifdef CONFIG_FS_POSIX_ACL
516                 if (lmd.posix_acl) {
517                         posix_acl_release(lmd.posix_acl);
518                         lmd.posix_acl = NULL;
519                 }
520 #endif
521                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
522                 root = NULL;
523                 CERROR("lustre_lite: bad iget4 for root\n");
524                 GOTO(out_root, err);
525         }
526
527         err = ll_close_thread_start(&sbi->ll_lcq);
528         if (err) {
529                 CERROR("cannot start close thread: rc %d\n", err);
530                 GOTO(out_root, err);
531         }
532
533 #ifdef CONFIG_FS_POSIX_ACL
534         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
535                 rct_init(&sbi->ll_rct);
536                 et_init(&sbi->ll_et);
537         }
538 #endif
539
540         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
541         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
542                                  KEY_CHECKSUM, sizeof(checksum), &checksum,
543                                  NULL);
544         cl_sb_init(sb);
545
546         sb->s_root = d_alloc_root(root);
547 #ifdef HAVE_DCACHE_LOCK
548         sb->s_root->d_op = &ll_d_root_ops;
549 #else
550         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
551         d_set_d_op(sb->s_root, &ll_d_root_ops);
552         sb->s_d_op = &ll_d_ops;
553 #endif
554
555         sbi->ll_sdev_orig = sb->s_dev;
556
557         /* We set sb->s_dev equal on all lustre clients in order to support
558          * NFS export clustering.  NFSD requires that the FSID be the same
559          * on all clients. */
560         /* s_dev is also used in lt_compare() to compare two fs, but that is
561          * only a node-local comparison. */
562         uuid = obd_get_uuid(sbi->ll_md_exp);
563         if (uuid != NULL)
564                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
565
566         if (data != NULL)
567                 OBD_FREE_PTR(data);
568         if (osfs != NULL)
569                 OBD_FREE_PTR(osfs);
570
571         RETURN(err);
572 out_root:
573         if (root)
574                 iput(root);
575 out_lock_cn_cb:
576         obd_fid_fini(sbi->ll_dt_exp);
577 out_dt:
578         obd_disconnect(sbi->ll_dt_exp);
579         sbi->ll_dt_exp = NULL;
580 out_md_fid:
581         obd_fid_fini(sbi->ll_md_exp);
582 out_md:
583         obd_disconnect(sbi->ll_md_exp);
584         sbi->ll_md_exp = NULL;
585 out:
586         if (data != NULL)
587                 OBD_FREE_PTR(data);
588         if (osfs != NULL)
589                 OBD_FREE_PTR(osfs);
590         lprocfs_unregister_mountpoint(sbi);
591         return err;
592 }
593
594 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
595 {
596         int size, rc;
597
598         *lmmsize = obd_size_diskmd(sbi->ll_dt_exp, NULL);
599         size = sizeof(int);
600         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
601                           KEY_MAX_EASIZE, &size, lmmsize, NULL);
602         if (rc)
603                 CERROR("Get max mdsize error rc %d \n", rc);
604
605         RETURN(rc);
606 }
607
608 void ll_dump_inode(struct inode *inode)
609 {
610         struct list_head *tmp;
611         int dentry_count = 0;
612
613         LASSERT(inode != NULL);
614
615         list_for_each(tmp, &inode->i_dentry)
616                 dentry_count++;
617
618         CERROR("inode %p dump: dev=%s ino=%lu mode=%o count=%u, %d dentries\n",
619                inode, ll_i2mdexp(inode)->exp_obd->obd_name, inode->i_ino,
620                inode->i_mode, atomic_read(&inode->i_count), dentry_count);
621 }
622
623 void lustre_dump_dentry(struct dentry *dentry, int recur)
624 {
625         struct list_head *tmp;
626         int subdirs = 0;
627
628         LASSERT(dentry != NULL);
629
630         list_for_each(tmp, &dentry->d_subdirs)
631                 subdirs++;
632
633         CERROR("dentry %p dump: name=%.*s parent=%.*s (%p), inode=%p, count=%u,"
634                " flags=0x%x, fsdata=%p, %d subdirs\n", dentry,
635                dentry->d_name.len, dentry->d_name.name,
636                dentry->d_parent->d_name.len, dentry->d_parent->d_name.name,
637                dentry->d_parent, dentry->d_inode, d_refcount(dentry),
638                dentry->d_flags, dentry->d_fsdata, subdirs);
639         if (dentry->d_inode != NULL)
640                 ll_dump_inode(dentry->d_inode);
641
642         if (recur == 0)
643                 return;
644
645         list_for_each(tmp, &dentry->d_subdirs) {
646                 struct dentry *d = list_entry(tmp, struct dentry, d_u.d_child);
647                 lustre_dump_dentry(d, recur - 1);
648         }
649 }
650
651 void client_common_put_super(struct super_block *sb)
652 {
653         struct ll_sb_info *sbi = ll_s2sbi(sb);
654         ENTRY;
655
656 #ifdef CONFIG_FS_POSIX_ACL
657         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
658                 et_fini(&sbi->ll_et);
659                 rct_fini(&sbi->ll_rct);
660         }
661 #endif
662
663         obd_cancel_unused(sbi->ll_dt_exp, NULL, 0, NULL);
664
665         ll_close_thread_shutdown(sbi->ll_lcq);
666
667         cl_sb_fini(sb);
668
669         cfs_list_del(&sbi->ll_conn_chain);
670
671         obd_fid_fini(sbi->ll_dt_exp);
672         obd_disconnect(sbi->ll_dt_exp);
673         sbi->ll_dt_exp = NULL;
674
675         lprocfs_unregister_mountpoint(sbi);
676
677         obd_fid_fini(sbi->ll_md_exp);
678         obd_disconnect(sbi->ll_md_exp);
679         sbi->ll_md_exp = NULL;
680
681         EXIT;
682 }
683
684 void ll_kill_super(struct super_block *sb)
685 {
686         struct ll_sb_info *sbi;
687
688         ENTRY;
689
690         /* not init sb ?*/
691         if (!(sb->s_flags & MS_ACTIVE))
692                 return;
693
694         sbi = ll_s2sbi(sb);
695         /* we need restore s_dev from changed for clustred NFS before put_super
696          * because new kernels have cached s_dev and change sb->s_dev in
697          * put_super not affected real removing devices */
698         if (sbi)
699                 sb->s_dev = sbi->ll_sdev_orig;
700         EXIT;
701 }
702
703 char *ll_read_opt(const char *opt, char *data)
704 {
705         char *value;
706         char *retval;
707         ENTRY;
708
709         CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
710         if (strncmp(opt, data, strlen(opt)))
711                 RETURN(NULL);
712         if ((value = strchr(data, '=')) == NULL)
713                 RETURN(NULL);
714
715         value++;
716         OBD_ALLOC(retval, strlen(value) + 1);
717         if (!retval) {
718                 CERROR("out of memory!\n");
719                 RETURN(NULL);
720         }
721
722         memcpy(retval, value, strlen(value)+1);
723         CDEBUG(D_SUPER, "Assigned option: %s, value %s\n", opt, retval);
724         RETURN(retval);
725 }
726
727 static inline int ll_set_opt(const char *opt, char *data, int fl)
728 {
729         if (strncmp(opt, data, strlen(opt)) != 0)
730                 return(0);
731         else
732                 return(fl);
733 }
734
735 /* non-client-specific mount options are parsed in lmd_parse */
736 static int ll_options(char *options, int *flags)
737 {
738         int tmp;
739         char *s1 = options, *s2;
740         ENTRY;
741
742         if (!options)
743                 RETURN(0);
744
745         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
746
747         while (*s1) {
748                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
749                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
750                 if (tmp) {
751                         *flags |= tmp;
752                         goto next;
753                 }
754                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
755                 if (tmp) {
756                         *flags |= tmp;
757                         goto next;
758                 }
759                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
760                 if (tmp) {
761                         *flags |= tmp;
762                         goto next;
763                 }
764                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
765                 if (tmp) {
766                         *flags &= ~tmp;
767                         goto next;
768                 }
769                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
770                 if (tmp) {
771                         *flags |= tmp;
772                         goto next;
773                 }
774                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
775                 if (tmp) {
776                         *flags &= ~tmp;
777                         goto next;
778                 }
779 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 5, 50, 0)
780                 tmp = ll_set_opt("acl", s1, LL_SBI_ACL);
781                 if (tmp) {
782                         /* Ignore deprecated mount option.  The client will
783                          * always try to mount with ACL support, whether this
784                          * is used depends on whether server supports it. */
785                         LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
786                                                   "mount option 'acl'.\n");
787                         goto next;
788                 }
789                 tmp = ll_set_opt("noacl", s1, LL_SBI_ACL);
790                 if (tmp) {
791                         LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
792                                                   "mount option 'noacl'.\n");
793                         goto next;
794                 }
795 #else
796 #warning "{no}acl options have been deprecated since 1.8, please remove them"
797 #endif
798                 tmp = ll_set_opt("remote_client", s1, LL_SBI_RMT_CLIENT);
799                 if (tmp) {
800                         *flags |= tmp;
801                         goto next;
802                 }
803                 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
804                 if (tmp) {
805                         *flags |= tmp;
806                         goto next;
807                 }
808                 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
809                 if (tmp) {
810                         *flags &= ~tmp;
811                         goto next;
812                 }
813
814                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
815                 if (tmp) {
816                         *flags |= tmp;
817                         goto next;
818                 }
819                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
820                 if (tmp) {
821                         *flags &= ~tmp;
822                         goto next;
823                 }
824                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
825                 if (tmp) {
826                         *flags |= tmp;
827                         goto next;
828                 }
829                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
830                 if (tmp) {
831                         *flags &= ~tmp;
832                         goto next;
833                 }
834                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
835                 if (tmp) {
836                         *flags |= tmp;
837                         goto next;
838                 }
839                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
840                 if (tmp) {
841                         *flags &= ~tmp;
842                         goto next;
843                 }
844                 tmp = ll_set_opt("som_preview", s1, LL_SBI_SOM_PREVIEW);
845                 if (tmp) {
846                         *flags |= tmp;
847                         goto next;
848                 }
849                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
850                 if (tmp) {
851                         *flags |= tmp;
852                         goto next;
853                 }
854                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
855                 if (tmp) {
856                         *flags |= tmp;
857                         goto next;
858                 }
859                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
860                 if (tmp) {
861                         *flags &= ~tmp;
862                         goto next;
863                 }
864                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
865                                    s1);
866                 RETURN(-EINVAL);
867
868 next:
869                 /* Find next opt */
870                 s2 = strchr(s1, ',');
871                 if (s2 == NULL)
872                         break;
873                 s1 = s2 + 1;
874         }
875         RETURN(0);
876 }
877
878 void ll_lli_init(struct ll_inode_info *lli)
879 {
880         lli->lli_inode_magic = LLI_INODE_MAGIC;
881         lli->lli_flags = 0;
882         lli->lli_ioepoch = 0;
883         lli->lli_maxbytes = MAX_LFS_FILESIZE;
884         cfs_spin_lock_init(&lli->lli_lock);
885         lli->lli_posix_acl = NULL;
886         lli->lli_remote_perms = NULL;
887         cfs_mutex_init(&lli->lli_rmtperm_mutex);
888         /* Do not set lli_fid, it has been initialized already. */
889         fid_zero(&lli->lli_pfid);
890         CFS_INIT_LIST_HEAD(&lli->lli_close_list);
891         CFS_INIT_LIST_HEAD(&lli->lli_oss_capas);
892         cfs_atomic_set(&lli->lli_open_count, 0);
893         lli->lli_mds_capa = NULL;
894         lli->lli_rmtperm_time = 0;
895         lli->lli_pending_och = NULL;
896         lli->lli_mds_read_och = NULL;
897         lli->lli_mds_write_och = NULL;
898         lli->lli_mds_exec_och = NULL;
899         lli->lli_open_fd_read_count = 0;
900         lli->lli_open_fd_write_count = 0;
901         lli->lli_open_fd_exec_count = 0;
902         cfs_mutex_init(&lli->lli_och_mutex);
903         cfs_spin_lock_init(&lli->lli_agl_lock);
904         lli->lli_has_smd = false;
905         lli->lli_clob = NULL;
906
907         LASSERT(lli->lli_vfs_inode.i_mode != 0);
908         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
909                 cfs_mutex_init(&lli->lli_readdir_mutex);
910                 lli->lli_opendir_key = NULL;
911                 lli->lli_sai = NULL;
912                 lli->lli_def_acl = NULL;
913                 cfs_spin_lock_init(&lli->lli_sa_lock);
914                 lli->lli_opendir_pid = 0;
915         } else {
916                 cfs_sema_init(&lli->lli_size_sem, 1);
917                 lli->lli_size_sem_owner = NULL;
918                 lli->lli_symlink_name = NULL;
919                 cfs_init_rwsem(&lli->lli_trunc_sem);
920                 cfs_mutex_init(&lli->lli_write_mutex);
921                 cfs_init_rwsem(&lli->lli_glimpse_sem);
922                 lli->lli_glimpse_time = 0;
923                 CFS_INIT_LIST_HEAD(&lli->lli_agl_list);
924                 lli->lli_agl_index = 0;
925                 lli->lli_async_rc = 0;
926         }
927         cfs_mutex_init(&lli->lli_layout_mutex);
928 }
929
930 static inline int ll_bdi_register(struct backing_dev_info *bdi)
931 {
932 #ifdef HAVE_BDI_REGISTER
933         static atomic_t ll_bdi_num = ATOMIC_INIT(0);
934
935 #ifdef HAVE_BDI_NAME
936         bdi->name = "lustre";
937 #endif
938         return bdi_register(bdi, NULL, "lustre-%d",
939                             atomic_inc_return(&ll_bdi_num));
940 #else
941         return 0;
942 #endif
943 }
944
945 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
946 {
947         struct lustre_profile *lprof = NULL;
948         struct lustre_sb_info *lsi = s2lsi(sb);
949         struct ll_sb_info *sbi;
950         char  *dt = NULL, *md = NULL;
951         char  *profilenm = get_profile_name(sb);
952         struct config_llog_instance *cfg;
953         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
954         const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
955         int    err;
956         ENTRY;
957
958         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
959
960         OBD_ALLOC_PTR(cfg);
961         if (cfg == NULL)
962                 RETURN(-ENOMEM);
963
964         cfs_module_get();
965
966         /* client additional sb info */
967         lsi->lsi_llsbi = sbi = ll_init_sbi();
968         if (!sbi) {
969                 cfs_module_put(THIS_MODULE);
970                 OBD_FREE_PTR(cfg);
971                 RETURN(-ENOMEM);
972         }
973
974         err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
975         if (err)
976                 GOTO(out_free, err);
977
978         err = ll_bdi_init(&lsi->lsi_bdi);
979         if (err)
980                 GOTO(out_free, err);
981         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
982         lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
983         err = ll_bdi_register(&lsi->lsi_bdi);
984         if (err)
985                 GOTO(out_free, err);
986
987 #ifdef HAVE_SB_BDI
988         sb->s_bdi = &lsi->lsi_bdi;
989 #endif
990
991         /* Generate a string unique to this super, in case some joker tries
992            to mount the same fs at two mount points.
993            Use the address of the super itself.*/
994         cfg->cfg_instance = sb;
995         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
996         cfg->cfg_callback = class_config_llog_handler;
997         /* set up client obds */
998         err = lustre_process_log(sb, profilenm, cfg);
999         if (err < 0) {
1000                 CERROR("Unable to process log: %d\n", err);
1001                 GOTO(out_free, err);
1002         }
1003
1004         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1005         lprof = class_get_profile(profilenm);
1006         if (lprof == NULL) {
1007                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1008                                    " read from the MGS.  Does that filesystem "
1009                                    "exist?\n", profilenm);
1010                 GOTO(out_free, err = -EINVAL);
1011         }
1012         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1013                lprof->lp_md, lprof->lp_dt);
1014
1015         OBD_ALLOC(dt, strlen(lprof->lp_dt) + instlen + 2);
1016         if (!dt)
1017                 GOTO(out_free, err = -ENOMEM);
1018         sprintf(dt, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
1019
1020         OBD_ALLOC(md, strlen(lprof->lp_md) + instlen + 2);
1021         if (!md)
1022                 GOTO(out_free, err = -ENOMEM);
1023         sprintf(md, "%s-%p", lprof->lp_md, cfg->cfg_instance);
1024
1025         /* connections, registrations, sb setup */
1026         err = client_common_fill_super(sb, md, dt, mnt);
1027
1028 out_free:
1029         if (md)
1030                 OBD_FREE(md, strlen(lprof->lp_md) + instlen + 2);
1031         if (dt)
1032                 OBD_FREE(dt, strlen(lprof->lp_dt) + instlen + 2);
1033         if (err)
1034                 ll_put_super(sb);
1035         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1036                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1037
1038         OBD_FREE_PTR(cfg);
1039         RETURN(err);
1040 } /* ll_fill_super */
1041
1042
1043 void lu_context_keys_dump(void);
1044
1045 void ll_put_super(struct super_block *sb)
1046 {
1047         struct config_llog_instance cfg;
1048         struct obd_device *obd;
1049         struct lustre_sb_info *lsi = s2lsi(sb);
1050         struct ll_sb_info *sbi = ll_s2sbi(sb);
1051         char *profilenm = get_profile_name(sb);
1052         int force = 1, next;
1053         ENTRY;
1054
1055         CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1056
1057         ll_print_capa_stat(sbi);
1058
1059         cfg.cfg_instance = sb;
1060         lustre_end_log(sb, profilenm, &cfg);
1061
1062         if (sbi->ll_md_exp) {
1063                 obd = class_exp2obd(sbi->ll_md_exp);
1064                 if (obd)
1065                         force = obd->obd_force;
1066         }
1067
1068         /* We need to set force before the lov_disconnect in
1069            lustre_common_put_super, since l_d cleans up osc's as well. */
1070         if (force) {
1071                 next = 0;
1072                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1073                                                      &next)) != NULL) {
1074                         obd->obd_force = force;
1075                 }
1076         }
1077
1078         if (sbi->ll_lcq) {
1079                 /* Only if client_common_fill_super succeeded */
1080                 client_common_put_super(sb);
1081         }
1082
1083         next = 0;
1084         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1085                 class_manual_cleanup(obd);
1086         }
1087
1088         if (sbi->ll_flags & LL_SBI_VERBOSE)
1089                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1090
1091         if (profilenm)
1092                 class_del_profile(profilenm);
1093
1094         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1095                 ll_bdi_destroy(&lsi->lsi_bdi);
1096                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1097         }
1098
1099         ll_free_sbi(sb);
1100         lsi->lsi_llsbi = NULL;
1101
1102         lustre_common_put_super(sb);
1103
1104         cl_env_cache_purge(~0);
1105
1106         cfs_module_put(THIS_MODULE);
1107
1108         EXIT;
1109 } /* client_put_super */
1110
1111 struct inode *ll_inode_from_lock(struct ldlm_lock *lock)
1112 {
1113         struct inode *inode = NULL;
1114         /* NOTE: we depend on atomic igrab() -bzzz */
1115         lock_res_and_lock(lock);
1116         if (lock->l_ast_data) {
1117                 struct ll_inode_info *lli = ll_i2info(lock->l_ast_data);
1118                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1119                         inode = igrab(lock->l_ast_data);
1120                 } else {
1121                         inode = lock->l_ast_data;
1122                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1123                                          D_WARNING, lock, "l_ast_data %p is "
1124                                          "bogus: magic %08x", lock->l_ast_data,
1125                                          lli->lli_inode_magic);
1126                         inode = NULL;
1127                 }
1128         }
1129         unlock_res_and_lock(lock);
1130         return inode;
1131 }
1132
1133 static int null_if_equal(struct ldlm_lock *lock, void *data)
1134 {
1135         if (data == lock->l_ast_data) {
1136                 lock->l_ast_data = NULL;
1137
1138                 if (lock->l_req_mode != lock->l_granted_mode)
1139                         LDLM_ERROR(lock,"clearing inode with ungranted lock");
1140         }
1141
1142         return LDLM_ITER_CONTINUE;
1143 }
1144
1145 void ll_clear_inode(struct inode *inode)
1146 {
1147         struct ll_inode_info *lli = ll_i2info(inode);
1148         struct ll_sb_info *sbi = ll_i2sbi(inode);
1149         ENTRY;
1150
1151         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
1152                inode->i_generation, inode);
1153
1154         if (S_ISDIR(inode->i_mode)) {
1155                 /* these should have been cleared in ll_file_release */
1156                 LASSERT(lli->lli_opendir_key == NULL);
1157                 LASSERT(lli->lli_sai == NULL);
1158                 LASSERT(lli->lli_opendir_pid == 0);
1159         }
1160
1161         ll_i2info(inode)->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
1162         md_change_cbdata(sbi->ll_md_exp, ll_inode2fid(inode),
1163                          null_if_equal, inode);
1164
1165         LASSERT(!lli->lli_open_fd_write_count);
1166         LASSERT(!lli->lli_open_fd_read_count);
1167         LASSERT(!lli->lli_open_fd_exec_count);
1168
1169         if (lli->lli_mds_write_och)
1170                 ll_md_real_close(inode, FMODE_WRITE);
1171         if (lli->lli_mds_exec_och)
1172                 ll_md_real_close(inode, FMODE_EXEC);
1173         if (lli->lli_mds_read_och)
1174                 ll_md_real_close(inode, FMODE_READ);
1175
1176         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1177                 OBD_FREE(lli->lli_symlink_name,
1178                          strlen(lli->lli_symlink_name) + 1);
1179                 lli->lli_symlink_name = NULL;
1180         }
1181
1182         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1183                 LASSERT(lli->lli_posix_acl == NULL);
1184                 if (lli->lli_remote_perms) {
1185                         free_rmtperm_hash(lli->lli_remote_perms);
1186                         lli->lli_remote_perms = NULL;
1187                 }
1188         }
1189 #ifdef CONFIG_FS_POSIX_ACL
1190         else if (lli->lli_posix_acl) {
1191                 LASSERT(cfs_atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1192                 LASSERT(lli->lli_remote_perms == NULL);
1193                 posix_acl_release(lli->lli_posix_acl);
1194                 lli->lli_posix_acl = NULL;
1195         }
1196 #endif
1197         lli->lli_inode_magic = LLI_INODE_DEAD;
1198
1199         ll_clear_inode_capas(inode);
1200         if (!S_ISDIR(inode->i_mode))
1201                 LASSERT(cfs_list_empty(&lli->lli_agl_list));
1202
1203         /*
1204          * XXX This has to be done before lsm is freed below, because
1205          * cl_object still uses inode lsm.
1206          */
1207         cl_inode_fini(inode);
1208         lli->lli_has_smd = false;
1209
1210         EXIT;
1211 }
1212
1213 int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data,
1214                   struct md_open_data **mod)
1215 {
1216         struct lustre_md md;
1217         struct inode *inode = dentry->d_inode;
1218         struct ll_sb_info *sbi = ll_i2sbi(inode);
1219         struct ptlrpc_request *request = NULL;
1220         int rc, ia_valid;
1221         ENTRY;
1222
1223         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1224                                      LUSTRE_OPC_ANY, NULL);
1225         if (IS_ERR(op_data))
1226                 RETURN(PTR_ERR(op_data));
1227
1228         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, NULL, 0,
1229                         &request, mod);
1230         if (rc) {
1231                 ptlrpc_req_finished(request);
1232                 if (rc == -ENOENT) {
1233                         inode->i_nlink = 0;
1234                         /* Unlinked special device node? Or just a race?
1235                          * Pretend we done everything. */
1236                         if (!S_ISREG(inode->i_mode) &&
1237                             !S_ISDIR(inode->i_mode)) {
1238                                 ia_valid = op_data->op_attr.ia_valid;
1239                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1240                                 rc = simple_setattr(dentry, &op_data->op_attr);
1241                                 op_data->op_attr.ia_valid = ia_valid;
1242                         }
1243                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1244                         CERROR("md_setattr fails: rc = %d\n", rc);
1245                 }
1246                 RETURN(rc);
1247         }
1248
1249         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1250                               sbi->ll_md_exp, &md);
1251         if (rc) {
1252                 ptlrpc_req_finished(request);
1253                 RETURN(rc);
1254         }
1255
1256         /* We want to adjust timestamps.
1257          * If there is at least some data in file, we cleared ATTR_SIZE
1258          * to avoid update size, otherwise it is important to do.(SOM case)
1259          * (bug 6196) */
1260         ia_valid = op_data->op_attr.ia_valid;
1261         /* Since we set ATTR_*_SET flags above, and already done permission
1262          * check, So don't let inode_change_ok() check it again.  */
1263         op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1264         rc = simple_setattr(dentry, &op_data->op_attr);
1265         op_data->op_attr.ia_valid = ia_valid;
1266
1267         /* Extract epoch data if obtained. */
1268         op_data->op_handle = md.body->handle;
1269         op_data->op_ioepoch = md.body->ioepoch;
1270
1271         ll_update_inode(inode, &md);
1272         ptlrpc_req_finished(request);
1273
1274         RETURN(rc);
1275 }
1276
1277 /* Close IO epoch and send Size-on-MDS attribute update. */
1278 static int ll_setattr_done_writing(struct inode *inode,
1279                                    struct md_op_data *op_data,
1280                                    struct md_open_data *mod)
1281 {
1282         struct ll_inode_info *lli = ll_i2info(inode);
1283         int rc = 0;
1284         ENTRY;
1285
1286         LASSERT(op_data != NULL);
1287         if (!S_ISREG(inode->i_mode))
1288                 RETURN(0);
1289
1290         CDEBUG(D_INODE, "Epoch "LPU64" closed on "DFID" for truncate\n",
1291                op_data->op_ioepoch, PFID(&lli->lli_fid));
1292
1293         op_data->op_flags = MF_EPOCH_CLOSE;
1294         ll_done_writing_attr(inode, op_data);
1295         ll_pack_inode2opdata(inode, op_data, NULL);
1296
1297         rc = md_done_writing(ll_i2sbi(inode)->ll_md_exp, op_data, mod);
1298         if (rc == -EAGAIN) {
1299                 /* MDS has instructed us to obtain Size-on-MDS attribute
1300                  * from OSTs and send setattr to back to MDS. */
1301                 rc = ll_som_update(inode, op_data);
1302         } else if (rc) {
1303                 CERROR("inode %lu mdc truncate failed: rc = %d\n",
1304                        inode->i_ino, rc);
1305         }
1306         RETURN(rc);
1307 }
1308
1309 static int ll_setattr_ost(struct inode *inode, struct iattr *attr)
1310 {
1311         struct obd_capa *capa;
1312         int rc;
1313
1314         if (attr->ia_valid & ATTR_SIZE)
1315                 capa = ll_osscapa_get(inode, CAPA_OPC_OSS_TRUNC);
1316         else
1317                 capa = ll_mdscapa_get(inode);
1318
1319         rc = cl_setattr_ost(inode, attr, capa);
1320
1321         if (attr->ia_valid & ATTR_SIZE)
1322                 ll_truncate_free_capa(capa);
1323         else
1324                 capa_put(capa);
1325
1326         return rc;
1327 }
1328
1329 #ifndef HAVE_VFS_INODE_NEWSIZE_OK
1330 /**
1331  * inode_newsize_ok - may this inode be truncated to a given size
1332  * @inode:      the inode to be truncated
1333  * @offset:     the new size to assign to the inode
1334  * @Returns:    0 on success, -ve errno on failure
1335  *
1336  * inode_newsize_ok will check filesystem limits and ulimits to check that the
1337  * new inode size is within limits. inode_newsize_ok will also send SIGXFSZ
1338  * when necessary. Caller must not proceed with inode size change if failure is
1339  * returned. @inode must be a file (not directory), with appropriate
1340  * permissions to allow truncate (inode_newsize_ok does NOT check these
1341  * conditions).
1342  *
1343  * inode_newsize_ok must be called with i_mutex held.
1344  */
1345 int inode_newsize_ok(const struct inode *inode, loff_t offset)
1346 {
1347         if (inode->i_size < offset) {
1348                 unsigned long limit;
1349
1350                 limit = rlimit(RLIMIT_FSIZE);
1351                 if (limit != RLIM_INFINITY && offset > limit)
1352                         goto out_sig;
1353                 if (offset > inode->i_sb->s_maxbytes)
1354                         goto out_big;
1355         } else {
1356                 /*
1357                  * truncation of in-use swapfiles is disallowed - it would
1358                  * cause subsequent swapout to scribble on the now-freed
1359                  * blocks.
1360                  */
1361                 if (IS_SWAPFILE(inode))
1362                         return -ETXTBSY;
1363         }
1364
1365         return 0;
1366 out_sig:
1367         send_sig(SIGXFSZ, current, 0);
1368 out_big:
1369         return -EFBIG;
1370 }
1371 #endif
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 lov_stripe_md *lsm;
1389         struct inode *inode = dentry->d_inode;
1390         struct ll_inode_info *lli = ll_i2info(inode);
1391         struct md_op_data *op_data = NULL;
1392         struct md_open_data *mod = NULL;
1393         int ia_valid = attr->ia_valid;
1394         int rc = 0, rc1 = 0;
1395         ENTRY;
1396
1397         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu valid %x\n", inode->i_ino,
1398                attr->ia_valid);
1399
1400         if (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 (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 (!(ia_valid & ATTR_ATIME_SET) && (attr->ia_valid & ATTR_ATIME)) {
1432                 attr->ia_atime = CFS_CURRENT_TIME;
1433                 attr->ia_valid |= ATTR_ATIME_SET;
1434         }
1435         if (!(ia_valid & ATTR_MTIME_SET) && (attr->ia_valid & ATTR_MTIME)) {
1436                 attr->ia_mtime = CFS_CURRENT_TIME;
1437                 attr->ia_valid |= ATTR_MTIME_SET;
1438         }
1439
1440         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1441                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %lu\n",
1442                        LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1443                        cfs_time_current_sec());
1444
1445         /* We always do an MDS RPC, even if we're only changing the size;
1446          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1447
1448         OBD_ALLOC_PTR(op_data);
1449         if (op_data == NULL)
1450                 RETURN(-ENOMEM);
1451
1452         if (!S_ISDIR(inode->i_mode)) {
1453                 if (ia_valid & ATTR_SIZE)
1454                         UP_WRITE_I_ALLOC_SEM(inode);
1455                 mutex_unlock(&inode->i_mutex);
1456                 cfs_down_write(&lli->lli_trunc_sem);
1457                 mutex_lock(&inode->i_mutex);
1458                 if (ia_valid & ATTR_SIZE)
1459                         DOWN_WRITE_I_ALLOC_SEM(inode);
1460         }
1461
1462         /* We need a steady stripe configuration for setattr to avoid
1463          * confusion. */
1464         lsm = ccc_inode_lsm_get(inode);
1465
1466         /* NB: ATTR_SIZE will only be set after this point if the size
1467          * resides on the MDS, ie, this file has no objects. */
1468         if (lsm != NULL)
1469                 attr->ia_valid &= ~ATTR_SIZE;
1470
1471         memcpy(&op_data->op_attr, attr, sizeof(*attr));
1472
1473         /* Open epoch for truncate. */
1474         if (exp_connect_som(ll_i2mdexp(inode)) &&
1475             (ia_valid & (ATTR_SIZE | ATTR_MTIME | ATTR_MTIME_SET)))
1476                 op_data->op_flags = MF_EPOCH_OPEN;
1477
1478         rc = ll_md_setattr(dentry, op_data, &mod);
1479         if (rc)
1480                 GOTO(out, rc);
1481
1482         ll_ioepoch_open(lli, op_data->op_ioepoch);
1483         if (lsm == NULL || !S_ISREG(inode->i_mode)) {
1484                 CDEBUG(D_INODE, "no lsm: not setting attrs on OST\n");
1485                 GOTO(out, rc = 0);
1486         }
1487
1488         if (ia_valid & ATTR_SIZE)
1489                 attr->ia_valid |= ATTR_SIZE;
1490         if (ia_valid & (ATTR_SIZE |
1491                         ATTR_ATIME | ATTR_ATIME_SET |
1492                         ATTR_MTIME | ATTR_MTIME_SET))
1493                 /* For truncate and utimes sending attributes to OSTs, setting
1494                  * mtime/atime to the past will be performed under PW [0:EOF]
1495                  * extent lock (new_size:EOF for truncate).  It may seem
1496                  * excessive to send mtime/atime updates to OSTs when not
1497                  * setting times to past, but it is necessary due to possible
1498                  * time de-synchronization between MDT inode and OST objects */
1499                 rc = ll_setattr_ost(inode, attr);
1500         EXIT;
1501 out:
1502         ccc_inode_lsm_put(inode, lsm);
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                 cfs_up_write(&lli->lli_trunc_sem);
1513
1514         ll_stats_ops_tally(ll_i2sbi(inode), (ia_valid & ATTR_SIZE) ?
1515                            LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1516
1517         return rc;
1518 }
1519
1520 int ll_setattr(struct dentry *de, struct iattr *attr)
1521 {
1522         int mode = de->d_inode->i_mode;
1523
1524         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1525                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1526                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1527
1528         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1529                                (ATTR_SIZE|ATTR_MODE)) &&
1530             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1531              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1532               !(attr->ia_mode & S_ISGID))))
1533                 attr->ia_valid |= ATTR_FORCE;
1534
1535         if ((mode & S_ISUID) &&
1536             !(attr->ia_mode & S_ISUID) &&
1537             !(attr->ia_valid & ATTR_KILL_SUID))
1538                 attr->ia_valid |= ATTR_KILL_SUID;
1539
1540         if (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1541             !(attr->ia_mode & S_ISGID) &&
1542             !(attr->ia_valid & ATTR_KILL_SGID))
1543                 attr->ia_valid |= ATTR_KILL_SGID;
1544
1545         return ll_setattr_raw(de, attr);
1546 }
1547
1548 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1549                        __u64 max_age, __u32 flags)
1550 {
1551         struct ll_sb_info *sbi = ll_s2sbi(sb);
1552         struct obd_statfs obd_osfs;
1553         int rc;
1554         ENTRY;
1555
1556         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1557         if (rc) {
1558                 CERROR("md_statfs fails: rc = %d\n", rc);
1559                 RETURN(rc);
1560         }
1561
1562         osfs->os_type = sb->s_magic;
1563
1564         CDEBUG(D_SUPER, "MDC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1565                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,osfs->os_files);
1566
1567         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1568                 flags |= OBD_STATFS_NODELAY;
1569
1570         rc = obd_statfs_rqset(sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1571         if (rc) {
1572                 CERROR("obd_statfs fails: rc = %d\n", rc);
1573                 RETURN(rc);
1574         }
1575
1576         CDEBUG(D_SUPER, "OSC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1577                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1578                obd_osfs.os_files);
1579
1580         osfs->os_bsize = obd_osfs.os_bsize;
1581         osfs->os_blocks = obd_osfs.os_blocks;
1582         osfs->os_bfree = obd_osfs.os_bfree;
1583         osfs->os_bavail = obd_osfs.os_bavail;
1584
1585         /* If we don't have as many objects free on the OST as inodes
1586          * on the MDS, we reduce the total number of inodes to
1587          * compensate, so that the "inodes in use" number is correct.
1588          */
1589         if (obd_osfs.os_ffree < osfs->os_ffree) {
1590                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1591                         obd_osfs.os_ffree;
1592                 osfs->os_ffree = obd_osfs.os_ffree;
1593         }
1594
1595         RETURN(rc);
1596 }
1597 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1598 {
1599         struct super_block *sb = de->d_sb;
1600         struct obd_statfs osfs;
1601         int rc;
1602
1603         CDEBUG(D_VFSTRACE, "VFS Op: at "LPU64" jiffies\n", get_jiffies_64());
1604         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1605
1606         /* Some amount of caching on the client is allowed */
1607         rc = ll_statfs_internal(sb, &osfs,
1608                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1609                                 0);
1610         if (rc)
1611                 return rc;
1612
1613         statfs_unpack(sfs, &osfs);
1614
1615         /* We need to downshift for all 32-bit kernels, because we can't
1616          * tell if the kernel is being called via sys_statfs64() or not.
1617          * Stop before overflowing f_bsize - in which case it is better
1618          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1619         if (sizeof(long) < 8) {
1620                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1621                         sfs->f_bsize <<= 1;
1622
1623                         osfs.os_blocks >>= 1;
1624                         osfs.os_bfree >>= 1;
1625                         osfs.os_bavail >>= 1;
1626                 }
1627         }
1628
1629         sfs->f_blocks = osfs.os_blocks;
1630         sfs->f_bfree = osfs.os_bfree;
1631         sfs->f_bavail = osfs.os_bavail;
1632
1633         return 0;
1634 }
1635
1636 void ll_inode_size_lock(struct inode *inode)
1637 {
1638         struct ll_inode_info *lli;
1639
1640         LASSERT(!S_ISDIR(inode->i_mode));
1641
1642         lli = ll_i2info(inode);
1643         LASSERT(lli->lli_size_sem_owner != current);
1644         cfs_down(&lli->lli_size_sem);
1645         LASSERT(lli->lli_size_sem_owner == NULL);
1646         lli->lli_size_sem_owner = current;
1647 }
1648
1649 void ll_inode_size_unlock(struct inode *inode)
1650 {
1651         struct ll_inode_info *lli;
1652
1653         lli = ll_i2info(inode);
1654         LASSERT(lli->lli_size_sem_owner == current);
1655         lli->lli_size_sem_owner = NULL;
1656         cfs_up(&lli->lli_size_sem);
1657 }
1658
1659 void ll_update_inode(struct inode *inode, struct lustre_md *md)
1660 {
1661         struct ll_inode_info *lli = ll_i2info(inode);
1662         struct mdt_body *body = md->body;
1663         struct lov_stripe_md *lsm = md->lsm;
1664         struct ll_sb_info *sbi = ll_i2sbi(inode);
1665
1666         LASSERT ((lsm != NULL) == ((body->valid & OBD_MD_FLEASIZE) != 0));
1667         if (lsm != NULL) {
1668                 LASSERT(S_ISREG(inode->i_mode));
1669                 cfs_mutex_lock(&lli->lli_och_mutex);
1670                 CDEBUG(D_INODE, "adding lsm %p to inode %lu/%u(%p)\n",
1671                                 lsm, inode->i_ino, inode->i_generation, inode);
1672                 /* cl_file_inode_init must go before lli_has_smd or a race
1673                  * is possible where client thinks the file has stripes,
1674                  * but lov raid0 is not setup yet and parallel e.g.
1675                  * glimpse would try to use uninitialized lov */
1676                 if (cl_file_inode_init(inode, md) == 0)
1677                         lli->lli_has_smd = true;
1678                 cfs_mutex_unlock(&lli->lli_och_mutex);
1679
1680                 lli->lli_maxbytes = lsm->lsm_maxbytes;
1681                 if (lli->lli_maxbytes > MAX_LFS_FILESIZE)
1682                         lli->lli_maxbytes = MAX_LFS_FILESIZE;
1683                 if (md->lsm != NULL)
1684                         obd_free_memmd(ll_i2dtexp(inode), &md->lsm);
1685         }
1686
1687         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1688                 if (body->valid & OBD_MD_FLRMTPERM)
1689                         ll_update_remote_perm(inode, md->remote_perm);
1690         }
1691 #ifdef CONFIG_FS_POSIX_ACL
1692         else if (body->valid & OBD_MD_FLACL) {
1693                 cfs_spin_lock(&lli->lli_lock);
1694                 if (lli->lli_posix_acl)
1695                         posix_acl_release(lli->lli_posix_acl);
1696                 lli->lli_posix_acl = md->posix_acl;
1697                 cfs_spin_unlock(&lli->lli_lock);
1698         }
1699 #endif
1700         inode->i_ino = cl_fid_build_ino(&body->fid1, 0);
1701         inode->i_generation = cl_fid_build_gen(&body->fid1);
1702
1703         if (body->valid & OBD_MD_FLATIME) {
1704                 if (body->atime > LTIME_S(inode->i_atime))
1705                         LTIME_S(inode->i_atime) = body->atime;
1706                 lli->lli_lvb.lvb_atime = body->atime;
1707         }
1708         if (body->valid & OBD_MD_FLMTIME) {
1709                 if (body->mtime > LTIME_S(inode->i_mtime)) {
1710                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
1711                                "to "LPU64"\n", inode->i_ino,
1712                                LTIME_S(inode->i_mtime), body->mtime);
1713                         LTIME_S(inode->i_mtime) = body->mtime;
1714                 }
1715                 lli->lli_lvb.lvb_mtime = body->mtime;
1716         }
1717         if (body->valid & OBD_MD_FLCTIME) {
1718                 if (body->ctime > LTIME_S(inode->i_ctime))
1719                         LTIME_S(inode->i_ctime) = body->ctime;
1720                 lli->lli_lvb.lvb_ctime = body->ctime;
1721         }
1722         if (body->valid & OBD_MD_FLMODE)
1723                 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
1724         if (body->valid & OBD_MD_FLTYPE)
1725                 inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
1726         LASSERT(inode->i_mode != 0);
1727         if (S_ISREG(inode->i_mode)) {
1728                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1, LL_MAX_BLKSIZE_BITS);
1729         } else {
1730                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1731         }
1732         if (body->valid & OBD_MD_FLUID)
1733                 inode->i_uid = body->uid;
1734         if (body->valid & OBD_MD_FLGID)
1735                 inode->i_gid = body->gid;
1736         if (body->valid & OBD_MD_FLFLAGS)
1737                 inode->i_flags = ll_ext_to_inode_flags(body->flags);
1738         if (body->valid & OBD_MD_FLNLINK)
1739                 inode->i_nlink = body->nlink;
1740         if (body->valid & OBD_MD_FLRDEV)
1741                 inode->i_rdev = old_decode_dev(body->rdev);
1742
1743         if (body->valid & OBD_MD_FLID) {
1744                 /* FID shouldn't be changed! */
1745                 if (fid_is_sane(&lli->lli_fid)) {
1746                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->fid1),
1747                                  "Trying to change FID "DFID
1748                                  " to the "DFID", inode %lu/%u(%p)\n",
1749                                  PFID(&lli->lli_fid), PFID(&body->fid1),
1750                                  inode->i_ino, inode->i_generation, inode);
1751                 } else
1752                         lli->lli_fid = body->fid1;
1753         }
1754
1755         LASSERT(fid_seq(&lli->lli_fid) != 0);
1756
1757         if (body->valid & OBD_MD_FLSIZE) {
1758                 if (exp_connect_som(ll_i2mdexp(inode)) &&
1759                     S_ISREG(inode->i_mode) && lli->lli_has_smd) {
1760                         struct lustre_handle lockh;
1761                         ldlm_mode_t mode;
1762
1763                         /* As it is possible a blocking ast has been processed
1764                          * by this time, we need to check there is an UPDATE
1765                          * lock on the client and set LLIF_MDS_SIZE_LOCK holding
1766                          * it. */
1767                         mode = ll_take_md_lock(inode, MDS_INODELOCK_UPDATE,
1768                                                &lockh);
1769                         if (mode) {
1770                                 if (lli->lli_flags & (LLIF_DONE_WRITING |
1771                                                       LLIF_EPOCH_PENDING |
1772                                                       LLIF_SOM_DIRTY)) {
1773                                         CERROR("ino %lu flags %u still has "
1774                                                "size authority! do not trust "
1775                                                "the size got from MDS\n",
1776                                                inode->i_ino, lli->lli_flags);
1777                                 } else {
1778                                         /* Use old size assignment to avoid
1779                                          * deadlock bz14138 & bz14326 */
1780                                         i_size_write(inode, body->size);
1781                                         lli->lli_flags |= LLIF_MDS_SIZE_LOCK;
1782                                 }
1783                                 ldlm_lock_decref(&lockh, mode);
1784                         }
1785                 } else {
1786                         /* Use old size assignment to avoid
1787                          * deadlock bz14138 & bz14326 */
1788                         i_size_write(inode, body->size);
1789
1790                         CDEBUG(D_VFSTRACE, "inode=%lu, updating i_size %llu\n",
1791                                inode->i_ino, (unsigned long long)body->size);
1792                 }
1793
1794                 if (body->valid & OBD_MD_FLBLOCKS)
1795                         inode->i_blocks = body->blocks;
1796         }
1797
1798         if (body->valid & OBD_MD_FLMDSCAPA) {
1799                 LASSERT(md->mds_capa);
1800                 ll_add_capa(inode, md->mds_capa);
1801         }
1802         if (body->valid & OBD_MD_FLOSSCAPA) {
1803                 LASSERT(md->oss_capa);
1804                 ll_add_capa(inode, md->oss_capa);
1805         }
1806 }
1807
1808 void ll_read_inode2(struct inode *inode, void *opaque)
1809 {
1810         struct lustre_md *md = opaque;
1811         struct ll_inode_info *lli = ll_i2info(inode);
1812         ENTRY;
1813
1814         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1815                PFID(&lli->lli_fid), inode);
1816
1817         LASSERT(!lli->lli_has_smd);
1818
1819         /* Core attributes from the MDS first.  This is a new inode, and
1820          * the VFS doesn't zero times in the core inode so we have to do
1821          * it ourselves.  They will be overwritten by either MDS or OST
1822          * attributes - we just need to make sure they aren't newer. */
1823         LTIME_S(inode->i_mtime) = 0;
1824         LTIME_S(inode->i_atime) = 0;
1825         LTIME_S(inode->i_ctime) = 0;
1826         inode->i_rdev = 0;
1827         ll_update_inode(inode, md);
1828
1829         /* OIDEBUG(inode); */
1830
1831         /* initializing backing dev info. */
1832         inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
1833
1834
1835         if (S_ISREG(inode->i_mode)) {
1836                 struct ll_sb_info *sbi = ll_i2sbi(inode);
1837                 inode->i_op = &ll_file_inode_operations;
1838                 inode->i_fop = sbi->ll_fop;
1839                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
1840                 EXIT;
1841         } else if (S_ISDIR(inode->i_mode)) {
1842                 inode->i_op = &ll_dir_inode_operations;
1843                 inode->i_fop = &ll_dir_operations;
1844                 EXIT;
1845         } else if (S_ISLNK(inode->i_mode)) {
1846                 inode->i_op = &ll_fast_symlink_inode_operations;
1847                 EXIT;
1848         } else {
1849                 inode->i_op = &ll_special_inode_operations;
1850
1851                 init_special_inode(inode, inode->i_mode,
1852                                    kdev_t_to_nr(inode->i_rdev));
1853
1854                 EXIT;
1855         }
1856 }
1857
1858 void ll_delete_inode(struct inode *inode)
1859 {
1860         struct cl_inode_info *lli = cl_i2info(inode);
1861         struct ll_sb_info    *sbi = ll_i2sbi(inode);
1862         int rc;
1863         ENTRY;
1864
1865         rc = obd_fid_delete(sbi->ll_md_exp, ll_inode2fid(inode));
1866         if (rc)
1867                 CERROR("fid_delete() failed, rc %d\n", rc);
1868
1869         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
1870                 /* discard all dirty pages before truncating them, required by
1871                  * osc_extent implementation at LU-1030. */
1872                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF, CL_FSYNC_DISCARD);
1873
1874         truncate_inode_pages(&inode->i_data, 0);
1875
1876         /* Workaround for LU-118 */
1877         if (inode->i_data.nrpages) {
1878                 TREE_READ_LOCK_IRQ(&inode->i_data);
1879                 TREE_READ_UNLOCK_IRQ(&inode->i_data);
1880                 LASSERTF(inode->i_data.nrpages == 0,
1881                          "inode=%lu/%u(%p) nrpages=%lu, see "
1882                          "http://jira.whamcloud.com/browse/LU-118\n",
1883                          inode->i_ino, inode->i_generation, inode,
1884                          inode->i_data.nrpages);
1885         }
1886         /* Workaround end */
1887
1888 #ifdef HAVE_SBOPS_EVICT_INODE
1889         ll_clear_inode(inode);
1890         end_writeback(inode);
1891 #else
1892         clear_inode(inode);
1893 #endif
1894
1895         EXIT;
1896 }
1897
1898 int ll_iocontrol(struct inode *inode, struct file *file,
1899                  unsigned int cmd, unsigned long arg)
1900 {
1901         struct ll_sb_info *sbi = ll_i2sbi(inode);
1902         struct ptlrpc_request *req = NULL;
1903         int rc, flags = 0;
1904         ENTRY;
1905
1906         switch(cmd) {
1907         case FSFILT_IOC_GETFLAGS: {
1908                 struct mdt_body *body;
1909                 struct md_op_data *op_data;
1910
1911                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
1912                                              0, 0, LUSTRE_OPC_ANY,
1913                                              NULL);
1914                 if (IS_ERR(op_data))
1915                         RETURN(PTR_ERR(op_data));
1916
1917                 op_data->op_valid = OBD_MD_FLFLAGS;
1918                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
1919                 ll_finish_md_op_data(op_data);
1920                 if (rc) {
1921                         CERROR("failure %d inode %lu\n", rc, inode->i_ino);
1922                         RETURN(-abs(rc));
1923                 }
1924
1925                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1926
1927                 flags = body->flags;
1928
1929                 ptlrpc_req_finished(req);
1930
1931                 RETURN(put_user(flags, (int *)arg));
1932         }
1933         case FSFILT_IOC_SETFLAGS: {
1934                 struct lov_stripe_md *lsm;
1935                 struct obd_info oinfo = { { { 0 } } };
1936                 struct md_op_data *op_data;
1937
1938                 if (get_user(flags, (int *)arg))
1939                         RETURN(-EFAULT);
1940
1941                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
1942                                              LUSTRE_OPC_ANY, NULL);
1943                 if (IS_ERR(op_data))
1944                         RETURN(PTR_ERR(op_data));
1945
1946                 ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags = flags;
1947                 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
1948                 rc = md_setattr(sbi->ll_md_exp, op_data,
1949                                 NULL, 0, NULL, 0, &req, NULL);
1950                 ll_finish_md_op_data(op_data);
1951                 ptlrpc_req_finished(req);
1952                 if (rc)
1953                         RETURN(rc);
1954
1955                 OBDO_ALLOC(oinfo.oi_oa);
1956                 if (!oinfo.oi_oa)
1957                         RETURN(-ENOMEM);
1958
1959                 lsm = ccc_inode_lsm_get(inode);
1960                 if (lsm == NULL) {
1961                         inode->i_flags = ll_ext_to_inode_flags(flags);
1962                         OBDO_FREE(oinfo.oi_oa);
1963                         RETURN(0);
1964                 }
1965
1966                 oinfo.oi_md = lsm;
1967                 oinfo.oi_oa->o_id = lsm->lsm_object_id;
1968                 oinfo.oi_oa->o_seq = lsm->lsm_object_seq;
1969                 oinfo.oi_oa->o_flags = flags;
1970                 oinfo.oi_oa->o_valid = OBD_MD_FLID | OBD_MD_FLFLAGS |
1971                                        OBD_MD_FLGROUP;
1972                 oinfo.oi_capa = ll_mdscapa_get(inode);
1973                 obdo_set_parent_fid(oinfo.oi_oa, &ll_i2info(inode)->lli_fid);
1974                 rc = obd_setattr_rqset(sbi->ll_dt_exp, &oinfo, NULL);
1975                 capa_put(oinfo.oi_capa);
1976                 OBDO_FREE(oinfo.oi_oa);
1977                 ccc_inode_lsm_put(inode, lsm);
1978
1979                 if (rc && rc != -EPERM && rc != -EACCES)
1980                         CERROR("osc_setattr_async fails: rc = %d\n", rc);
1981
1982                 RETURN(rc);
1983         }
1984         default:
1985                 RETURN(-ENOSYS);
1986         }
1987
1988         RETURN(0);
1989 }
1990
1991 int ll_flush_ctx(struct inode *inode)
1992 {
1993         struct ll_sb_info  *sbi = ll_i2sbi(inode);
1994
1995         CDEBUG(D_SEC, "flush context for user %d\n", cfs_curproc_uid());
1996
1997         obd_set_info_async(NULL, sbi->ll_md_exp,
1998                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
1999                            0, NULL, NULL);
2000         obd_set_info_async(NULL, sbi->ll_dt_exp,
2001                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2002                            0, NULL, NULL);
2003         return 0;
2004 }
2005
2006 /* umount -f client means force down, don't save state */
2007 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
2008 void ll_umount_begin(struct vfsmount *vfsmnt, int flags)
2009 {
2010         struct super_block *sb = vfsmnt->mnt_sb;
2011 #else
2012 void ll_umount_begin(struct super_block *sb)
2013 {
2014 #endif
2015         struct ll_sb_info *sbi = ll_s2sbi(sb);
2016         struct obd_device *obd;
2017         struct obd_ioctl_data *ioc_data;
2018         ENTRY;
2019
2020 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
2021         if (!(flags & MNT_FORCE)) {
2022                 EXIT;
2023                 return;
2024         }
2025 #endif
2026
2027         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2028                sb->s_count, atomic_read(&sb->s_active));
2029
2030         obd = class_exp2obd(sbi->ll_md_exp);
2031         if (obd == NULL) {
2032                 CERROR("Invalid MDC connection handle "LPX64"\n",
2033                        sbi->ll_md_exp->exp_handle.h_cookie);
2034                 EXIT;
2035                 return;
2036         }
2037         obd->obd_force = 1;
2038
2039         obd = class_exp2obd(sbi->ll_dt_exp);
2040         if (obd == NULL) {
2041                 CERROR("Invalid LOV connection handle "LPX64"\n",
2042                        sbi->ll_dt_exp->exp_handle.h_cookie);
2043                 EXIT;
2044                 return;
2045         }
2046         obd->obd_force = 1;
2047
2048         OBD_ALLOC_PTR(ioc_data);
2049         if (ioc_data) {
2050                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2051                               sizeof ioc_data, ioc_data, NULL);
2052
2053                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2054                               sizeof ioc_data, ioc_data, NULL);
2055
2056                 OBD_FREE_PTR(ioc_data);
2057         }
2058
2059
2060         /* Really, we'd like to wait until there are no requests outstanding,
2061          * and then continue.  For now, we just invalidate the requests,
2062          * schedule() and sleep one second if needed, and hope.
2063          */
2064         cfs_schedule();
2065 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
2066         if (atomic_read(&vfsmnt->mnt_count) > 2) {
2067                 cfs_schedule_timeout_and_set_state(CFS_TASK_INTERRUPTIBLE,
2068                                                    cfs_time_seconds(1));
2069                 if (atomic_read(&vfsmnt->mnt_count) > 2)
2070                         LCONSOLE_WARN("Mount still busy with %d refs! You "
2071                                       "may try to umount it a bit later\n",
2072                                       atomic_read(&vfsmnt->mnt_count));
2073         }
2074 #endif
2075
2076         EXIT;
2077 }
2078
2079 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2080 {
2081         struct ll_sb_info *sbi = ll_s2sbi(sb);
2082         char *profilenm = get_profile_name(sb);
2083         int err;
2084         __u32 read_only;
2085
2086         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2087                 read_only = *flags & MS_RDONLY;
2088                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2089                                          sizeof(KEY_READ_ONLY),
2090                                          KEY_READ_ONLY, sizeof(read_only),
2091                                          &read_only, NULL);
2092                 if (err) {
2093                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2094                                       profilenm, read_only ?
2095                                       "read-only" : "read-write", err);
2096                         return err;
2097                 }
2098
2099                 if (read_only)
2100                         sb->s_flags |= MS_RDONLY;
2101                 else
2102                         sb->s_flags &= ~MS_RDONLY;
2103
2104                 if (sbi->ll_flags & LL_SBI_VERBOSE)
2105                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2106                                       read_only ?  "read-only" : "read-write");
2107         }
2108         return 0;
2109 }
2110
2111 int ll_prep_inode(struct inode **inode,
2112                   struct ptlrpc_request *req,
2113                   struct super_block *sb)
2114 {
2115         struct ll_sb_info *sbi = NULL;
2116         struct lustre_md md;
2117         __u64 ibits;
2118         int rc;
2119         ENTRY;
2120
2121         LASSERT(*inode || sb);
2122         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2123         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2124                               sbi->ll_md_exp, &md);
2125         if (rc)
2126                 RETURN(rc);
2127
2128         if (*inode) {
2129                 ll_update_inode(*inode, &md);
2130         } else {
2131                 LASSERT(sb != NULL);
2132
2133                 /*
2134                  * At this point server returns to client's same fid as client
2135                  * generated for creating. So using ->fid1 is okay here.
2136                  */
2137                 LASSERT(fid_is_sane(&md.body->fid1));
2138
2139                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->fid1, 0), &md);
2140                 if (*inode == NULL || IS_ERR(*inode)) {
2141                         if (md.lsm)
2142                                 obd_free_memmd(sbi->ll_dt_exp, &md.lsm);
2143 #ifdef CONFIG_FS_POSIX_ACL
2144                         if (md.posix_acl) {
2145                                 posix_acl_release(md.posix_acl);
2146                                 md.posix_acl = NULL;
2147                         }
2148 #endif
2149                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2150                         *inode = NULL;
2151                         CERROR("new_inode -fatal: rc %d\n", rc);
2152                         GOTO(out, rc);
2153                 }
2154         }
2155
2156         /* sanity check for LAYOUT lock. */
2157         ibits = MDS_INODELOCK_LAYOUT;
2158         if (S_ISREG(md.body->mode) && sbi->ll_flags & LL_SBI_LAYOUT_LOCK &&
2159             md.lsm != NULL && !ll_have_md_lock(*inode, &ibits, LCK_MINMODE)) {
2160                 CERROR("%s: inode "DFID" (%p) layout lock not granted.\n",
2161                         ll_get_fsname(sb, NULL, 0),
2162                         PFID(ll_inode2fid(*inode)), *inode);
2163         }
2164
2165 out:
2166         md_free_lustre_md(sbi->ll_md_exp, &md);
2167         RETURN(rc);
2168 }
2169
2170 int ll_obd_statfs(struct inode *inode, void *arg)
2171 {
2172         struct ll_sb_info *sbi = NULL;
2173         struct obd_export *exp;
2174         char *buf = NULL;
2175         struct obd_ioctl_data *data = NULL;
2176         __u32 type;
2177         __u32 flags;
2178         int len = 0, rc;
2179
2180         if (!inode || !(sbi = ll_i2sbi(inode)))
2181                 GOTO(out_statfs, rc = -EINVAL);
2182
2183         rc = obd_ioctl_getdata(&buf, &len, arg);
2184         if (rc)
2185                 GOTO(out_statfs, rc);
2186
2187         data = (void*)buf;
2188         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2189             !data->ioc_pbuf1 || !data->ioc_pbuf2)
2190                 GOTO(out_statfs, rc = -EINVAL);
2191
2192         if (data->ioc_inllen1 != sizeof(__u32) ||
2193             data->ioc_inllen2 != sizeof(__u32) ||
2194             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2195             data->ioc_plen2 != sizeof(struct obd_uuid))
2196                 GOTO(out_statfs, rc = -EINVAL);
2197
2198         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2199         if (type & LL_STATFS_LMV)
2200                 exp = sbi->ll_md_exp;
2201         else if (type & LL_STATFS_LOV)
2202                 exp = sbi->ll_dt_exp;
2203         else
2204                 GOTO(out_statfs, rc = -ENODEV);
2205
2206         flags = (type & LL_STATFS_NODELAY) ? OBD_STATFS_NODELAY : 0;
2207         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, &flags);
2208         if (rc)
2209                 GOTO(out_statfs, rc);
2210 out_statfs:
2211         if (buf)
2212                 obd_ioctl_freedata(buf, len);
2213         return rc;
2214 }
2215
2216 int ll_process_config(struct lustre_cfg *lcfg)
2217 {
2218         char *ptr;
2219         void *sb;
2220         struct lprocfs_static_vars lvars;
2221         unsigned long x;
2222         int rc = 0;
2223
2224         lprocfs_llite_init_vars(&lvars);
2225
2226         /* The instance name contains the sb: lustre-client-aacfe000 */
2227         ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2228         if (!ptr || !*(++ptr))
2229                 return -EINVAL;
2230         if (sscanf(ptr, "%lx", &x) != 1)
2231                 return -EINVAL;
2232         sb = (void *)x;
2233         /* This better be a real Lustre superblock! */
2234         LASSERT(s2lsi((struct super_block *)sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2235
2236         /* Note we have not called client_common_fill_super yet, so
2237            proc fns must be able to handle that! */
2238         rc = class_process_proc_param(PARAM_LLITE, lvars.obd_vars,
2239                                       lcfg, sb);
2240         if (rc > 0)
2241                 rc = 0;
2242         return(rc);
2243 }
2244
2245 /* this function prepares md_op_data hint for passing ot down to MD stack. */
2246 struct md_op_data * ll_prep_md_op_data(struct md_op_data *op_data,
2247                                        struct inode *i1, struct inode *i2,
2248                                        const char *name, int namelen,
2249                                        int mode, __u32 opc, void *data)
2250 {
2251         LASSERT(i1 != NULL);
2252
2253         if (namelen > ll_i2sbi(i1)->ll_namelen)
2254                 return ERR_PTR(-ENAMETOOLONG);
2255
2256         if (op_data == NULL)
2257                 OBD_ALLOC_PTR(op_data);
2258
2259         if (op_data == NULL)
2260                 return ERR_PTR(-ENOMEM);
2261
2262         ll_i2gids(op_data->op_suppgids, i1, i2);
2263         op_data->op_fid1 = *ll_inode2fid(i1);
2264         op_data->op_capa1 = ll_mdscapa_get(i1);
2265
2266         if (i2) {
2267                 op_data->op_fid2 = *ll_inode2fid(i2);
2268                 op_data->op_capa2 = ll_mdscapa_get(i2);
2269         } else {
2270                 fid_zero(&op_data->op_fid2);
2271                 op_data->op_capa2 = NULL;
2272         }
2273
2274         op_data->op_name = name;
2275         op_data->op_namelen = namelen;
2276         op_data->op_mode = mode;
2277         op_data->op_mod_time = cfs_time_current_sec();
2278         op_data->op_fsuid = cfs_curproc_fsuid();
2279         op_data->op_fsgid = cfs_curproc_fsgid();
2280         op_data->op_cap = cfs_curproc_cap_pack();
2281         op_data->op_bias = MDS_CHECK_SPLIT;
2282         op_data->op_opc = opc;
2283         op_data->op_mds = 0;
2284         op_data->op_data = data;
2285
2286         /* If the file is being opened after mknod() (normally due to NFS)
2287          * try to use the default stripe data from parent directory for
2288          * allocating OST objects.  Try to pass the parent FID to MDS. */
2289         if (opc == LUSTRE_OPC_CREATE && i1 == i2 && S_ISREG(i2->i_mode) &&
2290             !ll_i2info(i2)->lli_has_smd) {
2291                 struct ll_inode_info *lli = ll_i2info(i2);
2292
2293                 cfs_spin_lock(&lli->lli_lock);
2294                 if (likely(!lli->lli_has_smd && !fid_is_zero(&lli->lli_pfid)))
2295                         op_data->op_fid1 = lli->lli_pfid;
2296                 cfs_spin_unlock(&lli->lli_lock);
2297                 /** We ignore parent's capability temporary. */
2298         }
2299
2300         return op_data;
2301 }
2302
2303 void ll_finish_md_op_data(struct md_op_data *op_data)
2304 {
2305         capa_put(op_data->op_capa1);
2306         capa_put(op_data->op_capa2);
2307         OBD_FREE_PTR(op_data);
2308 }
2309
2310 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
2311 {
2312         struct ll_sb_info *sbi;
2313
2314         LASSERT((seq != NULL) && (vfs != NULL));
2315         sbi = ll_s2sbi(vfs->mnt_sb);
2316
2317         if (sbi->ll_flags & LL_SBI_NOLCK)
2318                 seq_puts(seq, ",nolock");
2319
2320         if (sbi->ll_flags & LL_SBI_FLOCK)
2321                 seq_puts(seq, ",flock");
2322
2323         if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2324                 seq_puts(seq, ",localflock");
2325
2326         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2327                 seq_puts(seq, ",user_xattr");
2328
2329         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2330                 seq_puts(seq, ",lazystatfs");
2331
2332         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2333                 seq_puts(seq, ",user_fid2path");
2334
2335         RETURN(0);
2336 }
2337
2338 /**
2339  * Get obd name by cmd, and copy out to user space
2340  */
2341 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2342 {
2343         struct ll_sb_info *sbi = ll_i2sbi(inode);
2344         struct obd_device *obd;
2345         ENTRY;
2346
2347         if (cmd == OBD_IOC_GETDTNAME)
2348                 obd = class_exp2obd(sbi->ll_dt_exp);
2349         else if (cmd == OBD_IOC_GETMDNAME)
2350                 obd = class_exp2obd(sbi->ll_md_exp);
2351         else
2352                 RETURN(-EINVAL);
2353
2354         if (!obd)
2355                 RETURN(-ENOENT);
2356
2357         if (cfs_copy_to_user((void *)arg, obd->obd_name,
2358                              strlen(obd->obd_name) + 1))
2359                 RETURN(-EFAULT);
2360
2361         RETURN(0);
2362 }
2363
2364 /**
2365  * Get lustre file system name by \a sbi. If \a buf is provided(non-NULL), the
2366  * fsname will be returned in this buffer; otherwise, a static buffer will be
2367  * used to store the fsname and returned to caller.
2368  */
2369 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
2370 {
2371         static char fsname_static[MTI_NAME_MAXLEN];
2372         struct lustre_sb_info *lsi = s2lsi(sb);
2373         char *ptr;
2374         int len;
2375
2376         if (buf == NULL) {
2377                 /* this means the caller wants to use static buffer
2378                  * and it doesn't care about race. Usually this is
2379                  * in error reporting path */
2380                 buf = fsname_static;
2381                 buflen = sizeof(fsname_static);
2382         }
2383
2384         len = strlen(lsi->lsi_lmd->lmd_profile);
2385         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
2386         if (ptr && (strcmp(ptr, "-client") == 0))
2387                 len -= 7;
2388
2389         if (unlikely(len >= buflen))
2390                 len = buflen - 1;
2391         strncpy(buf, lsi->lsi_lmd->lmd_profile, len);
2392         buf[len] = '\0';
2393
2394         return buf;
2395 }