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[fs/lustre-release.git] / lustre / lvfs / fsfilt_ext3.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) 2002, 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/lvfs/fsfilt_ext3.c
37  *
38  * Author: Andreas Dilger <adilger@clusterfs.com>
39  */
40
41 #define DEBUG_SUBSYSTEM S_FILTER
42
43 #include <linux/init.h>
44 #include <linux/module.h>
45 #include <linux/fs.h>
46 #include <linux/slab.h>
47 #include <linux/pagemap.h>
48 #include <linux/quotaops.h>
49 #ifdef HAVE_LINUX_EXPORTFS_H
50 #include <linux/exportfs.h>
51 #endif
52 #ifdef HAVE_EXT4_LDISKFS
53 #include <ext4/ext4.h>
54 #include <ext4/ext4_jbd2.h>
55 #else
56 #include <linux/jbd.h>
57 #include <linux/ext3_fs.h>
58 #include <linux/ext3_jbd.h>
59 #endif
60 #include <linux/version.h>
61 #include <linux/bitops.h>
62 #include <linux/quota.h>
63 #ifdef HAVE_QUOTAIO_H
64 # include <linux/quotaio_v2.h>
65 #elif defined(HAVE_FS_QUOTA_QUOTAIO_H)
66 # include <quota/quotaio_v2.h>
67 # include <quota/quota_tree.h>
68 # define V2_DQTREEOFF    QT_TREEOFF
69 #elif defined(HAVE_FS_QUOTAIO_H)
70 # include <quotaio_v2.h>
71 # include <quota_tree.h>
72 # define V2_DQTREEOFF    QT_TREEOFF
73 # define V2_INITQVERSIONS_R1 V2_INITQVERSIONS
74 #endif
75
76 #ifdef QFMT_VFS_V1
77 #define QFMT_LUSTRE QFMT_VFS_V1
78 #else
79 #define QFMT_LUSTRE QFMT_VFS_V0
80 #endif
81
82 #if defined(HAVE_EXT3_XATTR_H)
83 # include <ext3/xattr.h>
84 #elif !defined(EXT3_XATTR_INDEX_TRUSTED)
85 /* ext3 xattr.h not available in rh style kernel-devel rpm */
86 /* CHAOS kernel-devel package will not include fs/ldiskfs/xattr.h */
87 # define EXT3_XATTR_INDEX_TRUSTED        4
88 extern int ext3_xattr_get(struct inode *, int, const char *, void *, size_t);
89 extern int ext3_xattr_set_handle(handle_t *, struct inode *, int, const char *, const void *, size_t, int);
90 #endif
91
92 #include <libcfs/libcfs.h>
93 #include <lustre_fsfilt.h>
94 #include <obd.h>
95 #include <lustre_quota.h>
96 #include <linux/lustre_compat25.h>
97 #include <linux/lprocfs_status.h>
98
99 #ifdef HAVE_EXT4_LDISKFS
100 #include <ext4/ext4_extents.h>
101 #else
102 #include <linux/ext3_extents.h>
103 #endif
104
105 #include "lustre_quota_fmt.h"
106
107 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15)
108 #define FSFILT_DATA_TRANS_BLOCKS(sb)      EXT3_DATA_TRANS_BLOCKS
109 #define FSFILT_DELETE_TRANS_BLOCKS(sb)    EXT3_DELETE_TRANS_BLOCKS
110 #else
111 #define FSFILT_DATA_TRANS_BLOCKS(sb)      EXT3_DATA_TRANS_BLOCKS(sb)
112 #define FSFILT_DELETE_TRANS_BLOCKS(sb)    EXT3_DELETE_TRANS_BLOCKS(sb)
113 #endif
114
115 /* for kernels 2.6.18 and later */
116 #define FSFILT_SINGLEDATA_TRANS_BLOCKS(sb) EXT3_SINGLEDATA_TRANS_BLOCKS(sb)
117
118 #define fsfilt_ext3_ext_insert_extent(handle, inode, path, newext, flag) \
119                ext3_ext_insert_extent(handle, inode, path, newext, flag)
120
121 #define ext3_mb_discard_inode_preallocations(inode) \
122                  ext3_discard_preallocations(inode)
123
124 #ifdef HAVE_EXT4_LDISKFS
125 #define fsfilt_log_start_commit(journal, tid) jbd2_log_start_commit(journal, tid)
126 #define fsfilt_log_wait_commit(journal, tid) jbd2_log_wait_commit(journal, tid)
127 #else
128 #define fsfilt_log_start_commit(journal, tid) log_start_commit(journal, tid)
129 #define fsfilt_log_wait_commit(journal, tid) log_wait_commit(journal, tid)
130 #define ext_pblock(ex) le32_to_cpu((ex)->ee_start)
131 #define ext3_ext_store_pblock(ex, pblock)  ((ex)->ee_start = cpu_to_le32(pblock))
132 #define ext3_inode_bitmap(sb,desc) le32_to_cpu((desc)->bg_inode_bitmap)
133 #endif
134
135 #ifdef HAVE_EXT4_JOURNAL_CALLBACK_ADD
136 # define journal_callback ext4_journal_cb_entry
137 # define fsfilt_journal_callback_set(handle, func, jcb) \
138          ext4_journal_callback_add(handle, func, jcb)
139 #elif defined(HAVE_JBD2_JOURNAL_CALLBACK_SET)
140 # define fsfilt_journal_callback_set(handle, func, jcb) \
141          jbd2_journal_callback_set(handle, func, jcb)
142 #elif defined(HAVE_JOURNAL_CALLBACK_SET)
143 # define fsfilt_journal_callback_set(handle, func, jcb) \
144          journal_callback_set(handle, func, jcb)
145 #else
146 # error missing journal commit callback
147 #endif /* HAVE_EXT4_JOURNAL_CALLBACK_ADD */
148
149 static cfs_mem_cache_t *fcb_cache;
150
151 struct fsfilt_cb_data {
152         struct journal_callback cb_jcb; /* jbd private data - MUST BE FIRST */
153         fsfilt_cb_t cb_func;            /* MDS/OBD completion function */
154         struct obd_device *cb_obd;      /* MDS/OBD completion device */
155         __u64 cb_last_rcvd;             /* MDS/OST last committed operation */
156         void *cb_data;                  /* MDS/OST completion function data */
157 };
158
159 #ifndef ext3_find_next_bit
160 #define ext3_find_next_bit           ext2_find_next_bit
161 #endif
162
163 #ifndef ext2_find_next_bit
164 #ifdef __LITTLE_ENDIAN
165 #define ext2_find_next_bit(addr, size, off) find_next_bit((unsigned long *)(addr), (size), (off))
166 #else
167 error "Need implementation of find_next_bit on big-endian systems"
168 #endif  /* __LITTLE_ENDIAN */
169 #endif  /* !ext2_find_next_le_bit */
170
171 static char *fsfilt_ext3_get_label(struct super_block *sb)
172 {
173         return EXT3_SB(sb)->s_es->s_volume_name;
174 }
175
176 static int fsfilt_ext3_set_label(struct super_block *sb, char *label)
177 {
178         /* see e.g. fsfilt_ext3_write_record() */
179         journal_t *journal;
180         handle_t *handle;
181         int err;
182
183         journal = EXT3_SB(sb)->s_journal;
184         handle = ext3_journal_start_sb(sb, 1);
185         if (IS_ERR(handle)) {
186                 CERROR("can't start transaction\n");
187                 return(PTR_ERR(handle));
188         }
189
190         err = ext3_journal_get_write_access(handle, EXT3_SB(sb)->s_sbh);
191         if (err)
192                 goto out;
193
194         memcpy(EXT3_SB(sb)->s_es->s_volume_name, label,
195                sizeof(EXT3_SB(sb)->s_es->s_volume_name));
196
197         err = ext3_journal_dirty_metadata(handle, EXT3_SB(sb)->s_sbh);
198
199 out:
200         ext3_journal_stop(handle);
201
202         return(err);
203 }
204
205 static char *fsfilt_ext3_uuid(struct super_block *sb)
206 {
207         return EXT3_SB(sb)->s_es->s_uuid;
208 }
209
210 #ifdef HAVE_DISK_INODE_VERSION
211
212 static __u64 get_i_version(struct inode *inode)
213 {
214         return EXT3_I(inode)->i_fs_version;
215 }
216
217 static void set_i_version(struct inode *inode, __u64 new_version)
218 {
219         (EXT3_I(inode))->i_fs_version = new_version;
220 }
221
222 /*
223  * Get the 64-bit version for an inode.
224  */
225 static __u64 fsfilt_ext3_get_version(struct inode *inode)
226 {
227         CDEBUG(D_INFO, "Get version "LPX64" for inode %lu\n",
228                get_i_version(inode), inode->i_ino);
229         return get_i_version(inode);
230 }
231
232 /*
233  * Set the 64-bit version and return the old version.
234  */
235 static __u64 fsfilt_ext3_set_version(struct inode *inode, __u64 new_version)
236 {
237         __u64 old_version = get_i_version(inode);
238
239         CDEBUG(D_INFO, "Set version "LPX64" (old "LPX64") for inode %lu\n",
240                new_version, old_version, inode->i_ino);
241         set_i_version(inode, new_version);
242         /* version is set after all inode operations are finished, so we should
243          * mark it dirty here */
244         inode->i_sb->s_op->dirty_inode(inode);
245         return old_version;
246 }
247
248 #endif
249
250 /*
251  * We don't currently need any additional blocks for rmdir and
252  * unlink transactions because we are storing the OST oa_id inside
253  * the inode (which we will be changing anyways as part of this
254  * transaction).
255  */
256 static void *fsfilt_ext3_start(struct inode *inode, int op, void *desc_private,
257                                int logs)
258 {
259         /* For updates to the last received file */
260         int nblocks = FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb);
261         journal_t *journal;
262         void *handle;
263
264         if (current->journal_info) {
265                 CDEBUG(D_INODE, "increasing refcount on %p\n",
266                        current->journal_info);
267                 goto journal_start;
268         }
269
270         switch(op) {
271         case FSFILT_OP_RMDIR:
272         case FSFILT_OP_UNLINK:
273                 /* delete one file + create/update logs for each stripe */
274                 nblocks += FSFILT_DELETE_TRANS_BLOCKS(inode->i_sb);
275                 nblocks += (EXT3_INDEX_EXTRA_TRANS_BLOCKS +
276                             FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb)) * logs;
277                 break;
278         case FSFILT_OP_RENAME:
279                 /* modify additional directory */
280                 nblocks += FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb);
281                 /* no break */
282         case FSFILT_OP_SYMLINK:
283                 /* additional block + block bitmap + GDT for long symlink */
284                 nblocks += 3;
285                 /* no break */
286         case FSFILT_OP_CREATE: {
287 #if defined(EXT3_EXTENTS_FL) && defined(EXT3_INDEX_FL) && !defined(HAVE_EXT4_LDISKFS)
288                 static int warned;
289                 if (!warned) {
290                         if (!test_opt(inode->i_sb, EXTENTS)) {
291                                 warned = 1;
292                         } else if (((EXT3_I(inode)->i_flags &
293                               cpu_to_le32(EXT3_EXTENTS_FL | EXT3_INDEX_FL)) ==
294                               cpu_to_le32(EXT3_EXTENTS_FL | EXT3_INDEX_FL))) {
295                                 CWARN("extent-mapped directory found with "
296                                       "ext3-based ldiskfs - contact "
297                                       "http://bugs.whamcloud.com/\n");
298                                 warned = 1;
299                         }
300                 }
301 #endif
302                 /* no break */
303         }
304         case FSFILT_OP_MKDIR:
305         case FSFILT_OP_MKNOD:
306                 /* modify one inode + block bitmap + GDT */
307                 nblocks += 3;
308                 /* no break */
309         case FSFILT_OP_LINK:
310                 /* modify parent directory */
311                 nblocks += EXT3_INDEX_EXTRA_TRANS_BLOCKS +
312                          FSFILT_DATA_TRANS_BLOCKS(inode->i_sb);
313                 /* create/update logs for each stripe */
314                 nblocks += (EXT3_INDEX_EXTRA_TRANS_BLOCKS +
315                             FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb)) * logs;
316                 break;
317         case FSFILT_OP_SETATTR:
318                 /* Setattr on inode */
319                 nblocks += 1;
320                 nblocks += EXT3_INDEX_EXTRA_TRANS_BLOCKS +
321                          FSFILT_DATA_TRANS_BLOCKS(inode->i_sb);
322                 /* quota chown log for each stripe */
323                 nblocks += (EXT3_INDEX_EXTRA_TRANS_BLOCKS +
324                             FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb)) * logs;
325                 break;
326         case FSFILT_OP_CANCEL_UNLINK:
327                 /* blocks for log header bitmap update OR
328                  * blocks for catalog header bitmap update + unlink of logs */
329                 nblocks = (LLOG_CHUNK_SIZE >> inode->i_blkbits) +
330                         FSFILT_DELETE_TRANS_BLOCKS(inode->i_sb) * logs;
331                 break;
332         default: CERROR("unknown transaction start op %d\n", op);
333                 LBUG();
334         }
335
336         LASSERT(current->journal_info == desc_private);
337         journal = EXT3_SB(inode->i_sb)->s_journal;
338         if (nblocks > journal->j_max_transaction_buffers) {
339                 CWARN("too many credits %d for op %ux%u using %d instead\n",
340                        nblocks, op, logs, journal->j_max_transaction_buffers);
341                 nblocks = journal->j_max_transaction_buffers;
342         }
343
344  journal_start:
345         LASSERTF(nblocks > 0, "can't start %d credit transaction\n", nblocks);
346         handle = ext3_journal_start(inode, nblocks);
347
348         if (!IS_ERR(handle))
349                 LASSERT(current->journal_info == handle);
350         else
351                 CERROR("error starting handle for op %u (%u credits): rc %ld\n",
352                        op, nblocks, PTR_ERR(handle));
353         return handle;
354 }
355
356 /*
357  * Calculate the number of buffer credits needed to write multiple pages in
358  * a single ext3 transaction.  No, this shouldn't be here, but as yet ext3
359  * doesn't have a nice API for calculating this sort of thing in advance.
360  *
361  * See comment above ext3_writepage_trans_blocks for details.  We assume
362  * no data journaling is being done, but it does allow for all of the pages
363  * being non-contiguous.  If we are guaranteed contiguous pages we could
364  * reduce the number of (d)indirect blocks a lot.
365  *
366  * With N blocks per page and P pages, for each inode we have at most:
367  * N*P indirect
368  * min(N*P, blocksize/4 + 1) dindirect blocks
369  * niocount tindirect
370  *
371  * For the entire filesystem, we have at most:
372  * min(sum(nindir + P), ngroups) bitmap blocks (from the above)
373  * min(sum(nindir + P), gdblocks) group descriptor blocks (from the above)
374  * objcount inode blocks
375  * 1 superblock
376  * 2 * EXT3_SINGLEDATA_TRANS_BLOCKS for the quota files
377  *
378  * 1 EXT3_DATA_TRANS_BLOCKS for the last_rcvd update.
379  */
380 static int fsfilt_ext3_credits_needed(int objcount, struct fsfilt_objinfo *fso,
381                                       int niocount, struct niobuf_local *nb)
382 {
383         struct super_block *sb = fso->fso_dentry->d_inode->i_sb;
384         __u64 next_indir;
385         const int blockpp = 1 << (CFS_PAGE_SHIFT - sb->s_blocksize_bits);
386         int nbitmaps = 0, ngdblocks;
387         int needed = objcount + 1; /* inodes + superblock */
388         int i, j;
389
390         for (i = 0, j = 0; i < objcount; i++, fso++) {
391                 /* two or more dindirect blocks in case we cross boundary */
392                 int ndind = (long)((nb[j + fso->fso_bufcnt - 1].offset -
393                                     nb[j].offset) >>
394                                    sb->s_blocksize_bits) /
395                         (EXT3_ADDR_PER_BLOCK(sb) * EXT3_ADDR_PER_BLOCK(sb));
396                 nbitmaps += min(fso->fso_bufcnt, ndind > 0 ? ndind : 2);
397
398                 /* leaf, indirect, tindirect blocks for first block */
399                 nbitmaps += blockpp + 2;
400
401                 j += fso->fso_bufcnt;
402         }
403
404         next_indir = nb[0].offset +
405                 (EXT3_ADDR_PER_BLOCK(sb) << sb->s_blocksize_bits);
406         for (i = 1; i < niocount; i++) {
407                 if (nb[i].offset >= next_indir) {
408                         nbitmaps++;     /* additional indirect */
409                         next_indir = nb[i].offset +
410                                 (EXT3_ADDR_PER_BLOCK(sb)<<sb->s_blocksize_bits);
411                 } else if (nb[i].offset != nb[i - 1].offset + sb->s_blocksize) {
412                         nbitmaps++;     /* additional indirect */
413                 }
414                 nbitmaps += blockpp;    /* each leaf in different group? */
415         }
416
417         ngdblocks = nbitmaps;
418         if (nbitmaps > EXT3_SB(sb)->s_groups_count)
419                 nbitmaps = EXT3_SB(sb)->s_groups_count;
420         if (ngdblocks > EXT3_SB(sb)->s_gdb_count)
421                 ngdblocks = EXT3_SB(sb)->s_gdb_count;
422
423         needed += nbitmaps + ngdblocks;
424
425         /* last_rcvd update */
426         needed += FSFILT_DATA_TRANS_BLOCKS(sb);
427
428 #if defined(CONFIG_QUOTA)
429         /* We assume that there will be 1 bit set in s_dquot.flags for each
430          * quota file that is active.  This is at least true for now.
431          */
432         needed += hweight32(ll_sb_any_quota_active(sb)) *
433                 FSFILT_SINGLEDATA_TRANS_BLOCKS(sb);
434 #endif
435
436         return needed;
437 }
438
439 /* We have to start a huge journal transaction here to hold all of the
440  * metadata for the pages being written here.  This is necessitated by
441  * the fact that we do lots of prepare_write operations before we do
442  * any of the matching commit_write operations, so even if we split
443  * up to use "smaller" transactions none of them could complete until
444  * all of them were opened.  By having a single journal transaction,
445  * we eliminate duplicate reservations for common blocks like the
446  * superblock and group descriptors or bitmaps.
447  *
448  * We will start the transaction here, but each prepare_write will
449  * add a refcount to the transaction, and each commit_write will
450  * remove a refcount.  The transaction will be closed when all of
451  * the pages have been written.
452  */
453 static void *fsfilt_ext3_brw_start(int objcount, struct fsfilt_objinfo *fso,
454                                    int niocount, struct niobuf_local *nb,
455                                    void *desc_private, int logs)
456 {
457         journal_t *journal;
458         handle_t *handle;
459         int needed;
460         ENTRY;
461
462         LASSERT(current->journal_info == desc_private);
463         journal = EXT3_SB(fso->fso_dentry->d_inode->i_sb)->s_journal;
464         needed = fsfilt_ext3_credits_needed(objcount, fso, niocount, nb);
465
466         /* The number of blocks we could _possibly_ dirty can very large.
467          * We reduce our request if it is absurd (and we couldn't get that
468          * many credits for a single handle anyways).
469          *
470          * At some point we have to limit the size of I/Os sent at one time,
471          * increase the size of the journal, or we have to calculate the
472          * actual journal requirements more carefully by checking all of
473          * the blocks instead of being maximally pessimistic.  It remains to
474          * be seen if this is a real problem or not.
475          */
476         if (needed > journal->j_max_transaction_buffers) {
477                 CERROR("want too many journal credits (%d) using %d instead\n",
478                        needed, journal->j_max_transaction_buffers);
479                 needed = journal->j_max_transaction_buffers;
480         }
481
482         LASSERTF(needed > 0, "can't start %d credit transaction\n", needed);
483         handle = ext3_journal_start(fso->fso_dentry->d_inode, needed);
484         if (IS_ERR(handle)) {
485                 CERROR("can't get handle for %d credits: rc = %ld\n", needed,
486                        PTR_ERR(handle));
487         } else {
488                 LASSERT(handle->h_buffer_credits >= needed);
489                 LASSERT(current->journal_info == handle);
490         }
491
492         RETURN(handle);
493 }
494
495 static int fsfilt_ext3_extend(struct inode *inode, unsigned int nblocks,void *h)
496 {
497        handle_t *handle = h;
498
499        /* fsfilt_extend called with nblocks = 0 for testing in special cases */
500        if (nblocks == 0) {
501                handle->h_buffer_credits = 0;
502                CWARN("setting credits of handle %p to zero by request\n", h);
503        }
504
505        if (handle->h_buffer_credits > nblocks)
506                 return 0;
507        if (ext3_journal_extend(handle, nblocks) == 0)
508                 return 0;
509
510        ext3_mark_inode_dirty(handle, inode);
511        return ext3_journal_restart(handle, nblocks);
512 }
513
514 static int fsfilt_ext3_commit(struct inode *inode, void *h, int force_sync)
515 {
516         int rc;
517         handle_t *handle = h;
518
519         LASSERT(current->journal_info == handle);
520         if (force_sync)
521                 handle->h_sync = 1; /* recovery likes this */
522
523         rc = ext3_journal_stop(handle);
524
525         return rc;
526 }
527
528 static int fsfilt_ext3_commit_async(struct inode *inode, void *h,
529                                     void **wait_handle)
530 {
531         unsigned long tid;
532         transaction_t *transaction;
533         handle_t *handle = h;
534         journal_t *journal;
535         int rc;
536
537         LASSERT(current->journal_info == handle);
538
539         transaction = handle->h_transaction;
540         journal = transaction->t_journal;
541         tid = transaction->t_tid;
542         /* we don't want to be blocked */
543         handle->h_sync = 0;
544         rc = ext3_journal_stop(handle);
545         if (rc) {
546                 CERROR("error while stopping transaction: %d\n", rc);
547                 return rc;
548         }
549         fsfilt_log_start_commit(journal, tid);
550
551         *wait_handle = (void *) tid;
552         CDEBUG(D_INODE, "commit async: %lu\n", (unsigned long) tid);
553         return 0;
554 }
555
556 static int fsfilt_ext3_commit_wait(struct inode *inode, void *h)
557 {
558         journal_t *journal = EXT3_JOURNAL(inode);
559         tid_t tid = (tid_t)(long)h;
560
561         CDEBUG(D_INODE, "commit wait: %lu\n", (unsigned long) tid);
562         if (unlikely(is_journal_aborted(journal)))
563                 return -EIO;
564
565         fsfilt_log_wait_commit(EXT3_JOURNAL(inode), tid);
566
567         if (unlikely(is_journal_aborted(journal)))
568                 return -EIO;
569         return 0;
570 }
571
572 static int fsfilt_ext3_setattr(struct dentry *dentry, void *handle,
573                                struct iattr *iattr, int do_trunc)
574 {
575         struct inode *inode = dentry->d_inode;
576         int rc = 0;
577
578 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2,7,50,0)
579         /* Try to correct for a bug in 2.1.0 (LU-221) that caused negative
580          * timestamps to appear to be in the far future, due old timestamp
581          * being stored on disk as an unsigned value.  This fixes up any
582          * bad values held by the client before storing them on disk,
583          * and ensures any timestamp updates are correct.  LU-1042 */
584         if (unlikely(LTIME_S(inode->i_atime) == LU221_BAD_TIME &&
585                      !(iattr->ia_valid & ATTR_ATIME))) {
586                 iattr->ia_valid |= ATTR_ATIME;
587                 LTIME_S(iattr->ia_atime) = 0;
588         }
589         if (unlikely(LTIME_S(inode->i_mtime) == LU221_BAD_TIME &&
590                      !(iattr->ia_valid & ATTR_MTIME))) {
591                 iattr->ia_valid |= ATTR_MTIME;
592                 LTIME_S(iattr->ia_mtime) = 0;
593         }
594         if (unlikely((LTIME_S(inode->i_ctime) == LU221_BAD_TIME ||
595                       LTIME_S(inode->i_ctime) == 0) &&
596                      !(iattr->ia_valid & ATTR_CTIME))) {
597                 iattr->ia_valid |= ATTR_CTIME;
598                 LTIME_S(iattr->ia_ctime) = 0;
599         }
600 #else
601 #warning "remove old LU-221/LU-1042 workaround code"
602 #endif
603
604         /* When initializating timestamps for new inodes, use the filesystem
605          * mkfs time for ctime to avoid e2fsck ibadness incorrectly thinking
606          * that this is potentially an invalid inode.  Files with an old ctime
607          * migrated to a newly-formatted OST with a newer s_mkfs_time will not
608          * hit this check, since it is only for ctime == 0.  LU-1010/LU-1042 */
609         if ((iattr->ia_valid & ATTR_CTIME) && LTIME_S(iattr->ia_ctime) == 0)
610                 LTIME_S(iattr->ia_ctime) =
611                         EXT4_SB(inode->i_sb)->s_es->s_mkfs_time;
612
613         /* Avoid marking the inode dirty on the superblock list unnecessarily.
614          * We are already writing the inode to disk as part of this
615          * transaction and want to avoid a lot of extra inode writeout
616          * later on. b=9828 */
617         if (iattr->ia_valid & ATTR_SIZE && !do_trunc) {
618                 /* ATTR_SIZE would invoke truncate: clear it */
619                 iattr->ia_valid &= ~ATTR_SIZE;
620                 EXT3_I(inode)->i_disksize = iattr->ia_size;
621                 i_size_write(inode, iattr->ia_size);
622
623                 if (iattr->ia_valid & ATTR_UID)
624                         inode->i_uid = iattr->ia_uid;
625                 if (iattr->ia_valid & ATTR_GID)
626                         inode->i_gid = iattr->ia_gid;
627                 if (iattr->ia_valid & ATTR_ATIME)
628                         inode->i_atime = iattr->ia_atime;
629                 if (iattr->ia_valid & ATTR_MTIME)
630                         inode->i_mtime = iattr->ia_mtime;
631                 if (iattr->ia_valid & ATTR_CTIME)
632                         inode->i_ctime = iattr->ia_ctime;
633                 if (iattr->ia_valid & ATTR_MODE) {
634                         inode->i_mode = iattr->ia_mode;
635
636                         if (!cfs_curproc_is_in_groups(inode->i_gid) &&
637                             !cfs_capable(CFS_CAP_FSETID))
638                                 inode->i_mode &= ~S_ISGID;
639                 }
640
641                 inode->i_sb->s_op->dirty_inode(inode);
642
643                 goto out;
644         }
645
646         /* Don't allow setattr to change file type */
647         if (iattr->ia_valid & ATTR_MODE)
648                 iattr->ia_mode = (inode->i_mode & S_IFMT) |
649                                  (iattr->ia_mode & ~S_IFMT);
650
651         /* We set these flags on the client, but have already checked perms
652          * so don't confuse inode_change_ok. */
653         iattr->ia_valid &= ~TIMES_SET_FLAGS;
654
655         if (inode->i_op->setattr) {
656                 rc = inode->i_op->setattr(dentry, iattr);
657         } else {
658 #ifndef HAVE_SIMPLE_SETATTR /* simple_setattr() already call it */
659                 rc = inode_change_ok(inode, iattr);
660                 if (!rc)
661 #endif
662                         rc = simple_setattr(dentry, iattr);
663         }
664
665  out:
666         RETURN(rc);
667 }
668
669 static int fsfilt_ext3_iocontrol(struct inode *inode, struct file *file,
670                                  unsigned int cmd, unsigned long arg)
671 {
672         int rc = 0;
673         ENTRY;
674
675         /* FIXME: Can't do this because of nested transaction deadlock */
676         if (cmd == EXT3_IOC_SETFLAGS) {
677                 /* We can't enable data journaling on OST objects, because
678                 * this forces the transaction to be closed in order to
679                 * flush the journal, but the caller will already have a
680                 * compound transaction open to update the last_rcvd file,
681                 * and this thread would deadlock trying to set the flag. */
682                 if ((*(int *)arg) & EXT3_JOURNAL_DATA_FL) {
683                         CERROR("can't set data journal flag on file\n");
684                         RETURN(-EPERM);
685                 }
686                 /* Because the MDS does not see the EXTENTS_FL set on the
687                  * OST objects, mask this flag into all set flags.  It is
688                  * not legal to clear this flag in any case, so we are not
689                  * changing the functionality by doing this.  b=22911 */
690                 *(int *)arg |= EXT3_I(inode)->i_flags & EXT3_EXTENTS_FL;
691         }
692
693 #ifdef HAVE_EXT4_LDISKFS
694         /* ext4_ioctl does not have a inode argument */
695         if (inode->i_fop->unlocked_ioctl)
696                 rc = inode->i_fop->unlocked_ioctl(file, cmd, arg);
697 #else
698         if (inode->i_fop->ioctl)
699                 rc = inode->i_fop->ioctl(inode, file, cmd, arg);
700 #endif
701         else
702                 RETURN(-ENOTTY);
703
704         RETURN(rc);
705 }
706
707 static int fsfilt_ext3_set_md(struct inode *inode, void *handle,
708                               void *lmm, int lmm_size, const char *name)
709 {
710         int rc;
711
712         LASSERT(TRYLOCK_INODE_MUTEX(inode) == 0);
713
714         rc = ext3_xattr_set_handle(handle, inode, EXT3_XATTR_INDEX_TRUSTED,
715                                    name, lmm, lmm_size, XATTR_NO_CTIME);
716
717
718         if (rc && rc != -EROFS)
719                 CERROR("error adding MD data to inode %lu: rc = %d\n",
720                        inode->i_ino, rc);
721         return rc;
722 }
723
724 /* Must be called with i_mutex held */
725 static int fsfilt_ext3_get_md(struct inode *inode, void *lmm, int lmm_size,
726                               const char *name)
727 {
728         int rc;
729
730         LASSERT(TRYLOCK_INODE_MUTEX(inode) == 0);
731
732         rc = ext3_xattr_get(inode, EXT3_XATTR_INDEX_TRUSTED,
733                             name, lmm, lmm_size);
734
735         /* This gives us the MD size */
736         if (lmm == NULL)
737                 return (rc == -ENODATA) ? 0 : rc;
738
739         if (rc < 0) {
740                 CDEBUG(D_INFO, "error getting EA %d/%s from inode %lu: rc %d\n",
741                        EXT3_XATTR_INDEX_TRUSTED, name,
742                        inode->i_ino, rc);
743                 memset(lmm, 0, lmm_size);
744                 return (rc == -ENODATA) ? 0 : rc;
745         }
746
747         return rc;
748 }
749
750 static int fsfilt_ext3_send_bio(int rw, struct inode *inode, struct bio *bio)
751 {
752         submit_bio(rw, bio);
753         return 0;
754 }
755
756 static ssize_t fsfilt_ext3_readpage(struct file *file, char *buf, size_t count,
757                                     loff_t *off)
758 {
759         struct inode *inode = file->f_dentry->d_inode;
760         int rc = 0;
761
762         if (S_ISREG(inode->i_mode))
763                 rc = file->f_op->read(file, buf, count, off);
764         else {
765                 const int blkbits = inode->i_sb->s_blocksize_bits;
766                 const int blksize = inode->i_sb->s_blocksize;
767
768                 CDEBUG(D_EXT2, "reading %lu at dir %lu+%llu\n",
769                        (unsigned long)count, inode->i_ino, *off);
770                 while (count > 0) {
771                         struct buffer_head *bh;
772
773                         bh = NULL;
774                         if (*off < i_size_read(inode)) {
775                                 int err = 0;
776
777                                 bh = ext3_bread(NULL, inode, *off >> blkbits,
778                                                 0, &err);
779
780                                 CDEBUG(D_EXT2, "read %u@%llu\n", blksize, *off);
781
782                                 if (bh) {
783                                         memcpy(buf, bh->b_data, blksize);
784                                         brelse(bh);
785                                 } else if (err) {
786                                         /* XXX in theory we should just fake
787                                          * this buffer and continue like ext3,
788                                          * especially if this is a partial read
789                                          */
790                                         CERROR("error read dir %lu+%llu: %d\n",
791                                                inode->i_ino, *off, err);
792                                         RETURN(err);
793                                 }
794                         }
795                         if (!bh) {
796                                 struct ext3_dir_entry_2 *fake = (void *)buf;
797
798                                 CDEBUG(D_EXT2, "fake %u@%llu\n", blksize, *off);
799                                 memset(fake, 0, sizeof(*fake));
800                                 fake->rec_len = cpu_to_le16(blksize);
801                         }
802                         count -= blksize;
803                         buf += blksize;
804                         *off += blksize;
805                         rc += blksize;
806                 }
807         }
808
809         return rc;
810 }
811
812 #ifdef HAVE_EXT4_JOURNAL_CALLBACK_ADD
813 static void fsfilt_ext3_cb_func(struct super_block *sb,
814                                 struct journal_callback *jcb, int error)
815 #else
816 static void fsfilt_ext3_cb_func(struct journal_callback *jcb, int error)
817 #endif
818 {
819         struct fsfilt_cb_data *fcb = container_of(jcb, typeof(*fcb), cb_jcb);
820
821         fcb->cb_func(fcb->cb_obd, fcb->cb_last_rcvd, fcb->cb_data, error);
822
823         OBD_SLAB_FREE(fcb, fcb_cache, sizeof *fcb);
824 }
825
826 static int fsfilt_ext3_add_journal_cb(struct obd_device *obd, __u64 last_rcvd,
827                                       void *handle, fsfilt_cb_t cb_func,
828                                       void *cb_data)
829 {
830         struct fsfilt_cb_data *fcb;
831
832         OBD_SLAB_ALLOC_PTR_GFP(fcb, fcb_cache, CFS_ALLOC_IO);
833         if (fcb == NULL)
834                 RETURN(-ENOMEM);
835
836         fcb->cb_func = cb_func;
837         fcb->cb_obd = obd;
838         fcb->cb_last_rcvd = last_rcvd;
839         fcb->cb_data = cb_data;
840
841         CDEBUG(D_EXT2, "set callback for last_rcvd: "LPD64"\n", last_rcvd);
842         fsfilt_journal_callback_set(handle, fsfilt_ext3_cb_func, &fcb->cb_jcb);
843
844         return 0;
845 }
846
847 static int fsfilt_ext3_statfs(struct super_block *sb, struct obd_statfs *osfs)
848 {
849         struct kstatfs sfs;
850         int rc;
851
852         memset(&sfs, 0, sizeof(sfs));
853         rc = ll_do_statfs(sb, &sfs);
854         statfs_pack(osfs, &sfs);
855         return rc;
856 }
857
858 static int fsfilt_ext3_sync(struct super_block *sb)
859 {
860         return ext3_force_commit(sb);
861 }
862
863 #ifndef EXT3_EXTENTS_FL
864 #define EXT3_EXTENTS_FL                 0x00080000 /* Inode uses extents */
865 #endif
866
867 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
868 # define fsfilt_up_truncate_sem(inode)  up(&LDISKFS_I(inode)->truncate_sem);
869 # define fsfilt_down_truncate_sem(inode)  down(&LDISKFS_I(inode)->truncate_sem);
870 #else
871 # ifdef HAVE_EXT4_LDISKFS
872 #   define fsfilt_up_truncate_sem(inode) do{ }while(0)
873 #   define fsfilt_down_truncate_sem(inode) do{ }while(0)
874 # else
875 #  define fsfilt_up_truncate_sem(inode)  mutex_unlock(&EXT3_I(inode)->truncate_mutex)
876 #  define fsfilt_down_truncate_sem(inode)  mutex_lock(&EXT3_I(inode)->truncate_mutex)
877 # endif
878 #endif
879
880 #ifndef EXT_ASSERT
881 #define EXT_ASSERT(cond)  BUG_ON(!(cond))
882 #endif
883
884 #ifdef EXT3_EXT_HAS_NO_TREE
885 /* for kernels 2.6.18 and later */
886 #ifdef HAVE_EXT4_LDISKFS
887 #define EXT_GENERATION(inode)           (EXT4_I(inode)->i_ext_generation)
888 #else
889 #define EXT_GENERATION(inode)           ext_generation(inode)
890 #endif
891 #define ext3_ext_base                   inode
892 #define ext3_ext_base2inode(inode)      (inode)
893 #define EXT_DEPTH(inode)                ext_depth(inode)
894 #define fsfilt_ext3_ext_walk_space(inode, block, num, cb, cbdata) \
895                         ext3_ext_walk_space(inode, block, num, cb, cbdata);
896 #else
897 #define ext3_ext_base                   ext3_extents_tree
898 #define ext3_ext_base2inode(tree)       (tree->inode)
899 #define fsfilt_ext3_ext_walk_space(tree, block, num, cb, cbdata) \
900                         ext3_ext_walk_space(tree, block, num, cb);
901 #endif
902
903 struct bpointers {
904         unsigned long *blocks;
905         int *created;
906         unsigned long start;
907         int num;
908         int init_num;
909         int create;
910 };
911
912 static long ext3_ext_find_goal(struct inode *inode, struct ext3_ext_path *path,
913                                unsigned long block, int *aflags)
914 {
915         struct ext3_inode_info *ei = EXT3_I(inode);
916         unsigned long bg_start;
917         unsigned long colour;
918         int depth;
919
920         if (path) {
921                 struct ext3_extent *ex;
922                 depth = path->p_depth;
923
924                 /* try to predict block placement */
925                 if ((ex = path[depth].p_ext))
926                         return ext_pblock(ex) + (block - le32_to_cpu(ex->ee_block));
927
928                 /* it looks index is empty
929                  * try to find starting from index itself */
930                 if (path[depth].p_bh)
931                         return path[depth].p_bh->b_blocknr;
932         }
933
934         /* OK. use inode's group */
935         bg_start = (ei->i_block_group * EXT3_BLOCKS_PER_GROUP(inode->i_sb)) +
936                 le32_to_cpu(EXT3_SB(inode->i_sb)->s_es->s_first_data_block);
937         colour = (current->pid % 16) *
938                 (EXT3_BLOCKS_PER_GROUP(inode->i_sb) / 16);
939         return bg_start + colour + block;
940 }
941
942 #define ll_unmap_underlying_metadata(sb, blocknr) \
943         unmap_underlying_metadata((sb)->s_bdev, blocknr)
944
945 #ifndef EXT3_MB_HINT_GROUP_ALLOC
946 static unsigned long new_blocks(handle_t *handle, struct ext3_ext_base *base,
947                                 struct ext3_ext_path *path, unsigned long block,
948                                 unsigned long *count, int *err)
949 {
950         unsigned long pblock, goal;
951         int aflags = 0;
952         struct inode *inode = ext3_ext_base2inode(base);
953
954         goal = ext3_ext_find_goal(inode, path, block, &aflags);
955         aflags |= 2; /* block have been already reserved */
956         pblock = ext3_mb_new_blocks(handle, inode, goal, count, aflags, err);
957         return pblock;
958
959 }
960 #else
961 static unsigned long new_blocks(handle_t *handle, struct ext3_ext_base *base,
962                                 struct ext3_ext_path *path, unsigned long block,
963                                 unsigned long *count, int *err)
964 {
965         struct inode *inode = ext3_ext_base2inode(base);
966         struct ext3_allocation_request ar;
967         unsigned long pblock;
968         int aflags;
969
970         /* find neighbour allocated blocks */
971         ar.lleft = block;
972         *err = ext3_ext_search_left(base, path, &ar.lleft, &ar.pleft);
973         if (*err)
974                 return 0;
975         ar.lright = block;
976         *err = ext3_ext_search_right(base, path, &ar.lright, &ar.pright);
977         if (*err)
978                 return 0;
979
980         /* allocate new block */
981         ar.goal = ext3_ext_find_goal(inode, path, block, &aflags);
982         ar.inode = inode;
983         ar.logical = block;
984         ar.len = *count;
985         ar.flags = EXT3_MB_HINT_DATA;
986         pblock = ext3_mb_new_blocks(handle, &ar, err);
987         *count = ar.len;
988         return pblock;
989 }
990 #endif
991
992 #ifdef EXT3_EXT_HAS_NO_TREE
993 static int ext3_ext_new_extent_cb(struct ext3_ext_base *base,
994                                   struct ext3_ext_path *path,
995                                   struct ext3_ext_cache *cex,
996 #ifdef HAVE_EXT_PREPARE_CB_EXTENT
997                                    struct ext3_extent *ex,
998 #endif
999                                   void *cbdata)
1000 {
1001         struct bpointers *bp = cbdata;
1002 #else
1003 static int ext3_ext_new_extent_cb(struct ext3_ext_base *base,
1004                                   struct ext3_ext_path *path,
1005                                   struct ext3_ext_cache *cex
1006 #ifdef HAVE_EXT_PREPARE_CB_EXTENT
1007                                   , struct ext3_extent *ex
1008 #endif
1009                                  )
1010 {
1011         struct bpointers *bp = base->private;
1012 #endif
1013         struct inode *inode = ext3_ext_base2inode(base);
1014         struct ext3_extent nex;
1015         unsigned long pblock;
1016         unsigned long tgen;
1017         int err, i;
1018         unsigned long count;
1019         handle_t *handle;
1020
1021         if (cex->ec_type == EXT3_EXT_CACHE_EXTENT) {
1022                 err = EXT_CONTINUE;
1023                 goto map;
1024         }
1025
1026         if (bp->create == 0) {
1027                 i = 0;
1028                 if (cex->ec_block < bp->start)
1029                         i = bp->start - cex->ec_block;
1030                 if (i >= cex->ec_len)
1031                         CERROR("nothing to do?! i = %d, e_num = %u\n",
1032                                         i, cex->ec_len);
1033                 for (; i < cex->ec_len && bp->num; i++) {
1034                         *(bp->created) = 0;
1035                         bp->created++;
1036                         *(bp->blocks) = 0;
1037                         bp->blocks++;
1038                         bp->num--;
1039                         bp->start++;
1040                 }
1041
1042                 return EXT_CONTINUE;
1043         }
1044
1045         tgen = EXT_GENERATION(base);
1046         count = ext3_ext_calc_credits_for_insert(base, path);
1047         fsfilt_up_truncate_sem(inode);
1048
1049         handle = ext3_journal_start(inode, count+EXT3_ALLOC_NEEDED+1);
1050         if (IS_ERR(handle)) {
1051                 fsfilt_down_truncate_sem(inode);
1052                 return PTR_ERR(handle);
1053         }
1054
1055         fsfilt_down_truncate_sem(inode);
1056         if (tgen != EXT_GENERATION(base)) {
1057                 /* the tree has changed. so path can be invalid at moment */
1058                 ext3_journal_stop(handle);
1059                 return EXT_REPEAT;
1060         }
1061
1062 #if defined(HAVE_EXT4_LDISKFS)
1063         /* In 2.6.32 kernel, ext4_ext_walk_space()'s callback func is not
1064          * protected by i_data_sem as whole. so we patch it to store
1065          * generation to path and now verify the tree hasn't changed */
1066         down_write((&EXT4_I(inode)->i_data_sem));
1067
1068         /* validate extent, make sure the extent tree does not changed */
1069         if (EXT_GENERATION(base) != path[0].p_generation) {
1070                 /* cex is invalid, try again */
1071                 up_write(&EXT4_I(inode)->i_data_sem);
1072                 ext3_journal_stop(handle);
1073                 return EXT_REPEAT;
1074         }
1075 #endif
1076
1077         count = cex->ec_len;
1078         pblock = new_blocks(handle, base, path, cex->ec_block, &count, &err);
1079         if (!pblock)
1080                 goto out;
1081         EXT_ASSERT(count <= cex->ec_len);
1082
1083         /* insert new extent */
1084         nex.ee_block = cpu_to_le32(cex->ec_block);
1085         ext3_ext_store_pblock(&nex, pblock);
1086         nex.ee_len = cpu_to_le16(count);
1087         err = fsfilt_ext3_ext_insert_extent(handle, base, path, &nex, 0);
1088         if (err) {
1089                 /* free data blocks we just allocated */
1090                 /* not a good idea to call discard here directly,
1091                  * but otherwise we'd need to call it every free() */
1092 #ifdef EXT3_MB_HINT_GROUP_ALLOC
1093                 ext3_mb_discard_inode_preallocations(inode);
1094 #endif
1095                 ext3_free_blocks(handle, inode, ext_pblock(&nex),
1096                                  cpu_to_le16(nex.ee_len), 0);
1097                 goto out;
1098         }
1099
1100         /*
1101          * Putting len of the actual extent we just inserted,
1102          * we are asking ext3_ext_walk_space() to continue
1103          * scaning after that block
1104          */
1105         cex->ec_len = le16_to_cpu(nex.ee_len);
1106         cex->ec_start = ext_pblock(&nex);
1107         BUG_ON(le16_to_cpu(nex.ee_len) == 0);
1108         BUG_ON(le32_to_cpu(nex.ee_block) != cex->ec_block);
1109
1110 out:
1111 #if defined(HAVE_EXT4_LDISKFS)
1112         up_write((&EXT4_I(inode)->i_data_sem));
1113 #endif
1114         ext3_journal_stop(handle);
1115 map:
1116         if (err >= 0) {
1117                 /* map blocks */
1118                 if (bp->num == 0) {
1119                         CERROR("hmm. why do we find this extent?\n");
1120                         CERROR("initial space: %lu:%u\n",
1121                                 bp->start, bp->init_num);
1122                         CERROR("current extent: %u/%u/%llu %d\n",
1123                                 cex->ec_block, cex->ec_len,
1124                                 (unsigned long long)cex->ec_start,
1125                                 cex->ec_type);
1126                 }
1127                 i = 0;
1128                 if (cex->ec_block < bp->start)
1129                         i = bp->start - cex->ec_block;
1130                 if (i >= cex->ec_len)
1131                         CERROR("nothing to do?! i = %d, e_num = %u\n",
1132                                         i, cex->ec_len);
1133                 for (; i < cex->ec_len && bp->num; i++) {
1134                         *(bp->blocks) = cex->ec_start + i;
1135                         if (cex->ec_type == EXT3_EXT_CACHE_EXTENT) {
1136                                 *(bp->created) = 0;
1137                         } else {
1138                                 *(bp->created) = 1;
1139                                 /* unmap any possible underlying metadata from
1140                                  * the block device mapping.  bug 6998. */
1141                                 ll_unmap_underlying_metadata(inode->i_sb,
1142                                                              *(bp->blocks));
1143                         }
1144                         bp->created++;
1145                         bp->blocks++;
1146                         bp->num--;
1147                         bp->start++;
1148                 }
1149         }
1150         return err;
1151 }
1152
1153 int fsfilt_map_nblocks(struct inode *inode, unsigned long block,
1154                        unsigned long num, unsigned long *blocks,
1155                        int *created, int create)
1156 {
1157 #ifdef EXT3_EXT_HAS_NO_TREE
1158         struct ext3_ext_base *base = inode;
1159 #else
1160         struct ext3_extents_tree tree;
1161         struct ext3_ext_base *base = &tree;
1162 #endif
1163         struct bpointers bp;
1164         int err;
1165
1166         CDEBUG(D_OTHER, "blocks %lu-%lu requested for inode %u\n",
1167                block, block + num - 1, (unsigned) inode->i_ino);
1168
1169 #ifndef EXT3_EXT_HAS_NO_TREE
1170         ext3_init_tree_desc(base, inode);
1171         tree.private = &bp;
1172 #endif
1173         bp.blocks = blocks;
1174         bp.created = created;
1175         bp.start = block;
1176         bp.init_num = bp.num = num;
1177         bp.create = create;
1178
1179         fsfilt_down_truncate_sem(inode);
1180         err = fsfilt_ext3_ext_walk_space(base, block, num,
1181                                          ext3_ext_new_extent_cb, &bp);
1182         ext3_ext_invalidate_cache(base);
1183         fsfilt_up_truncate_sem(inode);
1184
1185         return err;
1186 }
1187
1188 int fsfilt_ext3_map_ext_inode_pages(struct inode *inode, struct page **page,
1189                                     int pages, unsigned long *blocks,
1190                                     int *created, int create)
1191 {
1192         int blocks_per_page = CFS_PAGE_SIZE >> inode->i_blkbits;
1193         int rc = 0, i = 0;
1194         struct page *fp = NULL;
1195         int clen = 0;
1196
1197         CDEBUG(D_OTHER, "inode %lu: map %d pages from %lu\n",
1198                 inode->i_ino, pages, (*page)->index);
1199
1200         /* pages are sorted already. so, we just have to find
1201          * contig. space and process them properly */
1202         while (i < pages) {
1203                 if (fp == NULL) {
1204                         /* start new extent */
1205                         fp = *page++;
1206                         clen = 1;
1207                         i++;
1208                         continue;
1209                 } else if (fp->index + clen == (*page)->index) {
1210                         /* continue the extent */
1211                         page++;
1212                         clen++;
1213                         i++;
1214                         continue;
1215                 }
1216
1217                 /* process found extent */
1218                 rc = fsfilt_map_nblocks(inode, fp->index * blocks_per_page,
1219                                         clen * blocks_per_page, blocks,
1220                                         created, create);
1221                 if (rc)
1222                         GOTO(cleanup, rc);
1223
1224                 /* look for next extent */
1225                 fp = NULL;
1226                 blocks += blocks_per_page * clen;
1227                 created += blocks_per_page * clen;
1228         }
1229
1230         if (fp)
1231                 rc = fsfilt_map_nblocks(inode, fp->index * blocks_per_page,
1232                                         clen * blocks_per_page, blocks,
1233                                         created, create);
1234 cleanup:
1235         return rc;
1236 }
1237
1238 extern int ext3_map_inode_page(struct inode *inode, struct page *page,
1239                                unsigned long *blocks, int *created, int create);
1240 int fsfilt_ext3_map_bm_inode_pages(struct inode *inode, struct page **page,
1241                                    int pages, unsigned long *blocks,
1242                                    int *created, int create)
1243 {
1244         int blocks_per_page = CFS_PAGE_SIZE >> inode->i_blkbits;
1245         unsigned long *b;
1246         int rc = 0, i, *cr;
1247
1248         for (i = 0, cr = created, b = blocks; i < pages; i++, page++) {
1249                 rc = ext3_map_inode_page(inode, *page, b, cr, create);
1250                 if (rc) {
1251                         CERROR("ino %lu, blk %lu cr %u create %d: rc %d\n",
1252                                inode->i_ino, *b, *cr, create, rc);
1253                         break;
1254                 }
1255
1256                 b += blocks_per_page;
1257                 cr += blocks_per_page;
1258         }
1259         return rc;
1260 }
1261
1262 int fsfilt_ext3_map_inode_pages(struct inode *inode, struct page **page,
1263                                 int pages, unsigned long *blocks,
1264                                 int *created, int create,
1265                                 cfs_mutex_t *optional_mutex)
1266 {
1267         int rc;
1268
1269         if (EXT3_I(inode)->i_flags & EXT3_EXTENTS_FL) {
1270                 rc = fsfilt_ext3_map_ext_inode_pages(inode, page, pages,
1271                                                      blocks, created, create);
1272                 return rc;
1273         }
1274         if (optional_mutex != NULL)
1275                 cfs_mutex_lock(optional_mutex);
1276         rc = fsfilt_ext3_map_bm_inode_pages(inode, page, pages, blocks,
1277                                             created, create);
1278         if (optional_mutex != NULL)
1279                 cfs_mutex_unlock(optional_mutex);
1280
1281         return rc;
1282 }
1283
1284 int fsfilt_ext3_read(struct inode *inode, void *buf, int size, loff_t *offs)
1285 {
1286         unsigned long block;
1287         struct buffer_head *bh;
1288         int err, blocksize, csize, boffs, osize = size;
1289
1290         /* prevent reading after eof */
1291         spin_lock(&inode->i_lock);
1292         if (i_size_read(inode) < *offs + size) {
1293                 size = i_size_read(inode) - *offs;
1294                 spin_unlock(&inode->i_lock);
1295                 if (size < 0) {
1296                         CDEBUG(D_EXT2, "size %llu is too short for read @%llu\n",
1297                                i_size_read(inode), *offs);
1298                         return -EBADR;
1299                 } else if (size == 0) {
1300                         return 0;
1301                 }
1302         } else {
1303                 spin_unlock(&inode->i_lock);
1304         }
1305
1306         blocksize = 1 << inode->i_blkbits;
1307
1308         while (size > 0) {
1309                 block = *offs >> inode->i_blkbits;
1310                 boffs = *offs & (blocksize - 1);
1311                 csize = min(blocksize - boffs, size);
1312                 bh = ext3_bread(NULL, inode, block, 0, &err);
1313                 if (!bh) {
1314                         CERROR("can't read block: %d\n", err);
1315                         return err;
1316                 }
1317
1318                 memcpy(buf, bh->b_data + boffs, csize);
1319                 brelse(bh);
1320
1321                 *offs += csize;
1322                 buf += csize;
1323                 size -= csize;
1324         }
1325         return osize;
1326 }
1327 EXPORT_SYMBOL(fsfilt_ext3_read);
1328
1329 static int fsfilt_ext3_read_record(struct file * file, void *buf,
1330                                    int size, loff_t *offs)
1331 {
1332         int rc;
1333         rc = fsfilt_ext3_read(file->f_dentry->d_inode, buf, size, offs);
1334         if (rc > 0)
1335                 rc = 0;
1336         return rc;
1337 }
1338
1339 int fsfilt_ext3_write_handle(struct inode *inode, void *buf, int bufsize,
1340                                 loff_t *offs, handle_t *handle)
1341 {
1342         struct buffer_head *bh = NULL;
1343         loff_t old_size = i_size_read(inode), offset = *offs;
1344         loff_t new_size = i_size_read(inode);
1345         unsigned long block;
1346         int err = 0, blocksize = 1 << inode->i_blkbits, size, boffs;
1347
1348         while (bufsize > 0) {
1349                 if (bh != NULL)
1350                         brelse(bh);
1351
1352                 block = offset >> inode->i_blkbits;
1353                 boffs = offset & (blocksize - 1);
1354                 size = min(blocksize - boffs, bufsize);
1355                 bh = ext3_bread(handle, inode, block, 1, &err);
1356                 if (!bh) {
1357                         CERROR("can't read/create block: %d\n", err);
1358                         break;
1359                 }
1360
1361                 err = ext3_journal_get_write_access(handle, bh);
1362                 if (err) {
1363                         CERROR("journal_get_write_access() returned error %d\n",
1364                                err);
1365                         break;
1366                 }
1367                 LASSERT(bh->b_data + boffs + size <= bh->b_data + bh->b_size);
1368                 memcpy(bh->b_data + boffs, buf, size);
1369                 err = ext3_journal_dirty_metadata(handle, bh);
1370                 if (err) {
1371                         CERROR("journal_dirty_metadata() returned error %d\n",
1372                                err);
1373                         break;
1374                 }
1375                 if (offset + size > new_size)
1376                         new_size = offset + size;
1377                 offset += size;
1378                 bufsize -= size;
1379                 buf += size;
1380         }
1381         if (bh)
1382                 brelse(bh);
1383
1384         /* correct in-core and on-disk sizes */
1385         if (new_size > i_size_read(inode)) {
1386                 spin_lock(&inode->i_lock);
1387                 if (new_size > i_size_read(inode))
1388                         i_size_write(inode, new_size);
1389                 if (i_size_read(inode) > EXT3_I(inode)->i_disksize)
1390                         EXT3_I(inode)->i_disksize = i_size_read(inode);
1391                 if (i_size_read(inode) > old_size) {
1392                         spin_unlock(&inode->i_lock);
1393                         mark_inode_dirty(inode);
1394                 } else {
1395                         spin_unlock(&inode->i_lock);
1396                 }
1397         }
1398
1399         if (err == 0)
1400                 *offs = offset;
1401         return err;
1402 }
1403 EXPORT_SYMBOL(fsfilt_ext3_write_handle);
1404
1405 static int fsfilt_ext3_write_record(struct file *file, void *buf, int bufsize,
1406                                     loff_t *offs, int force_sync)
1407 {
1408         struct inode *inode = file->f_dentry->d_inode;
1409         handle_t *handle;
1410         int err, block_count = 0, blocksize;
1411
1412         /* Determine how many transaction credits are needed */
1413         blocksize = 1 << inode->i_blkbits;
1414         block_count = (*offs & (blocksize - 1)) + bufsize;
1415         block_count = (block_count + blocksize - 1) >> inode->i_blkbits;
1416
1417         handle = ext3_journal_start(inode,
1418                                block_count * FSFILT_DATA_TRANS_BLOCKS(inode->i_sb) + 2);
1419         if (IS_ERR(handle)) {
1420                 CERROR("can't start transaction for %d blocks (%d bytes)\n",
1421                        block_count * FSFILT_DATA_TRANS_BLOCKS(inode->i_sb) + 2, bufsize);
1422                 return PTR_ERR(handle);
1423         }
1424
1425         err = fsfilt_ext3_write_handle(inode, buf, bufsize, offs, handle);
1426
1427         if (!err && force_sync)
1428                 handle->h_sync = 1; /* recovery likes this */
1429
1430         ext3_journal_stop(handle);
1431
1432         return err;
1433 }
1434
1435 static int fsfilt_ext3_setup(struct super_block *sb)
1436 {
1437 #if ((LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,6)) && \
1438      defined(HAVE_QUOTA_SUPPORT)) || defined(S_PDIROPS)
1439         struct ext3_sb_info *sbi = EXT3_SB(sb);
1440 #if 0
1441         sbi->dx_lock = fsfilt_ext3_dx_lock;
1442         sbi->dx_unlock = fsfilt_ext3_dx_unlock;
1443 #endif
1444 #endif
1445         if (!EXT3_HAS_COMPAT_FEATURE(sb,
1446                                 EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1447                 CERROR("ext3 mounted without journal\n");
1448                 return -EINVAL;
1449         }
1450
1451 #ifdef S_PDIROPS
1452         CWARN("Enabling PDIROPS\n");
1453         set_opt(sbi->s_mount_opt, PDIROPS);
1454         sb->s_flags |= S_PDIROPS;
1455 #endif
1456         if (!EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_DIR_INDEX))
1457                 CWARN("filesystem doesn't have dir_index feature enabled\n");
1458 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,6)) && defined(HAVE_QUOTA_SUPPORT)
1459         /* enable journaled quota support */
1460         /* kfreed in ext3_put_super() */
1461         sbi->s_qf_names[USRQUOTA] = kstrdup("lquota.user.reserved", GFP_KERNEL);
1462         if (!sbi->s_qf_names[USRQUOTA])
1463                 return -ENOMEM;
1464         sbi->s_qf_names[GRPQUOTA] = kstrdup("lquota.group.reserved", GFP_KERNEL);
1465         if (!sbi->s_qf_names[GRPQUOTA]) {
1466                 kfree(sbi->s_qf_names[USRQUOTA]);
1467                 sbi->s_qf_names[USRQUOTA] = NULL;
1468                 return -ENOMEM;
1469         }
1470         sbi->s_jquota_fmt = QFMT_LUSTRE;
1471 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,13))
1472         set_opt(sbi->s_mount_opt, QUOTA);
1473 #endif
1474 #endif
1475         return 0;
1476 }
1477
1478 /* If fso is NULL, op is FSFILT operation, otherwise op is number of fso
1479    objects. Logs is number of logfiles to update */
1480 static int fsfilt_ext3_get_op_len(int op, struct fsfilt_objinfo *fso, int logs)
1481 {
1482         if ( !fso ) {
1483                 switch(op) {
1484                 case FSFILT_OP_CREATE:
1485                                  /* directory leaf, index & indirect & EA*/
1486                         return 4 + 3 * logs;
1487                 case FSFILT_OP_UNLINK:
1488                         return 3 * logs;
1489                 }
1490         } else {
1491                 int i;
1492                 int needed = 0;
1493                 struct super_block *sb = fso->fso_dentry->d_inode->i_sb;
1494                 int blockpp = 1 << (CFS_PAGE_SHIFT - sb->s_blocksize_bits);
1495                 int addrpp = EXT3_ADDR_PER_BLOCK(sb) * blockpp;
1496                 for (i = 0; i < op; i++, fso++) {
1497                         int nblocks = fso->fso_bufcnt * blockpp;
1498                         int ndindirect = min(nblocks, addrpp + 1);
1499                         int nindir = nblocks + ndindirect + 1;
1500
1501                         needed += nindir;
1502                 }
1503                 return needed + 3 * logs;
1504         }
1505
1506         return 0;
1507 }
1508
1509 #ifdef HAVE_QUOTA_SUPPORT
1510 #define DQINFO_COPY(out, in)                    \
1511 do {                                            \
1512         Q_COPY(out, in, dqi_bgrace);            \
1513         Q_COPY(out, in, dqi_igrace);            \
1514         Q_COPY(out, in, dqi_flags);             \
1515         Q_COPY(out, in, dqi_valid);             \
1516 } while (0)
1517
1518 #define DQBLK_COPY(out, in)                     \
1519 do {                                            \
1520         Q_COPY(out, in, dqb_bhardlimit);        \
1521         Q_COPY(out, in, dqb_bsoftlimit);        \
1522         Q_COPY(out, in, dqb_curspace);          \
1523         Q_COPY(out, in, dqb_ihardlimit);        \
1524         Q_COPY(out, in, dqb_isoftlimit);        \
1525         Q_COPY(out, in, dqb_curinodes);         \
1526         Q_COPY(out, in, dqb_btime);             \
1527         Q_COPY(out, in, dqb_itime);             \
1528         Q_COPY(out, in, dqb_valid);             \
1529 } while (0)
1530
1531 static int fsfilt_ext3_quotactl(struct super_block *sb,
1532                                 struct obd_quotactl *oqc)
1533 {
1534         int i, rc = 0, error = 0;
1535         const struct quotactl_ops *qcop;
1536         struct if_dqinfo *info;
1537         struct if_dqblk *dqblk;
1538         ENTRY;
1539
1540         if (!sb->s_qcop)
1541                 RETURN(-ENOSYS);
1542
1543         OBD_ALLOC_PTR(info);
1544         if (!info)
1545                 RETURN(-ENOMEM);
1546         OBD_ALLOC_PTR(dqblk);
1547         if (!dqblk) {
1548                 OBD_FREE_PTR(info);
1549                 RETURN(-ENOMEM);
1550         }
1551
1552         DQINFO_COPY(info, &oqc->qc_dqinfo);
1553         DQBLK_COPY(dqblk, &oqc->qc_dqblk);
1554
1555         qcop = sb->s_qcop;
1556         if (oqc->qc_cmd == Q_QUOTAON || oqc->qc_cmd == Q_QUOTAOFF) {
1557                 for (i = 0; i < MAXQUOTAS; i++) {
1558                         if (!Q_TYPESET(oqc, i))
1559                                 continue;
1560
1561                         if (oqc->qc_cmd == Q_QUOTAON) {
1562                                 char *name[MAXQUOTAS] = LUSTRE_OPQFILES_NAMES_V2;
1563
1564                                 LASSERT(oqc->qc_id == LUSTRE_QUOTA_V2);
1565
1566                                 rc = ll_quota_on(sb, i, QFMT_LUSTRE,
1567                                                  name[i], 0);
1568                         } else if (oqc->qc_cmd == Q_QUOTAOFF) {
1569                                 rc = ll_quota_off(sb, i, 0);
1570                         }
1571
1572                         if (rc == -EBUSY)
1573                                 error = rc;
1574                         else if (rc)
1575                                 GOTO(out, rc);
1576                 }
1577                 GOTO(out, rc ?: error);
1578         }
1579
1580         switch (oqc->qc_cmd) {
1581         case Q_GETOINFO:
1582         case Q_GETINFO:
1583                 if (!qcop->get_info)
1584                         GOTO(out, rc = -ENOSYS);
1585                 rc = qcop->get_info(sb, oqc->qc_type, info);
1586                 break;
1587         case Q_SETQUOTA:
1588         case Q_INITQUOTA:
1589                 if (!qcop->set_dqblk)
1590                         GOTO(out, rc = -ENOSYS);
1591                 rc = qcop->set_dqblk(sb, oqc->qc_type, oqc->qc_id, dqblk);
1592                 break;
1593         case Q_GETOQUOTA:
1594         case Q_GETQUOTA:
1595                 if (!qcop->get_dqblk)
1596                         GOTO(out, rc = -ENOSYS);
1597                 rc = qcop->get_dqblk(sb, oqc->qc_type, oqc->qc_id, dqblk);
1598                 if (!rc)
1599                         dqblk->dqb_valid = QIF_LIMITS | QIF_USAGE;
1600                 break;
1601         case Q_SYNC:
1602                 if (!sb->s_qcop->quota_sync)
1603                         GOTO(out, rc = -ENOSYS);
1604                 qcop->quota_sync(sb, oqc->qc_type);
1605                 break;
1606         case Q_FINVALIDATE:
1607                 CDEBUG(D_WARNING, "invalidating operational quota files\n");
1608                 for (i = 0; i < MAXQUOTAS; i++) {
1609                         struct file *fp;
1610                         char *name[MAXQUOTAS] = LUSTRE_OPQFILES_NAMES_V2;
1611
1612                         LASSERT(oqc->qc_id == LUSTRE_QUOTA_V2);
1613
1614                         if (!Q_TYPESET(oqc, i))
1615                                 continue;
1616
1617                         fp = filp_open(name[i], O_CREAT | O_TRUNC | O_RDWR, 0644);
1618                         if (IS_ERR(fp)) {
1619                                 rc = PTR_ERR(fp);
1620                                 CERROR("error invalidating operational quota file"
1621                                        " %s (rc:%d)\n", name[i], rc);
1622                         } else {
1623                                 filp_close(fp, 0);
1624                         }
1625
1626                 }
1627                 break;
1628         default:
1629                 CERROR("unsupported quotactl command: %d\n", oqc->qc_cmd);
1630                 LBUG();
1631         }
1632 out:
1633         DQINFO_COPY(&oqc->qc_dqinfo, info);
1634         DQBLK_COPY(&oqc->qc_dqblk, dqblk);
1635
1636         OBD_FREE_PTR(info);
1637         OBD_FREE_PTR(dqblk);
1638
1639         if (rc)
1640                 CDEBUG(D_QUOTA, "quotactl command %#x, id %u, type %u "
1641                                 "failed: %d\n",
1642                        oqc->qc_cmd, oqc->qc_id, oqc->qc_type, rc);
1643         RETURN(rc);
1644 }
1645
1646 struct chk_dqblk{
1647         cfs_hlist_node_t        dqb_hash;        /** quotacheck hash */
1648         cfs_list_t              dqb_list;        /** in list also */
1649         qid_t                   dqb_id;          /** uid/gid */
1650         short                   dqb_type;        /** USRQUOTA/GRPQUOTA */
1651         qsize_t                 dqb_bhardlimit;  /** block hard limit */
1652         qsize_t                 dqb_bsoftlimit;  /** block soft limit */
1653         qsize_t                 dqb_curspace;    /** current space */
1654         qsize_t                 dqb_ihardlimit;  /** inode hard limit */
1655         qsize_t                 dqb_isoftlimit;  /** inode soft limit */
1656         qsize_t                 dqb_curinodes;   /** current inodes */
1657         obd_time                dqb_btime;       /** block grace time */
1658         obd_time                dqb_itime;       /** inode grace time */
1659         __u32                   dqb_valid;       /** flag for above fields */
1660 };
1661
1662 static inline unsigned int chkquot_hash(qid_t id, int type)
1663                                         __attribute__((__const__));
1664
1665 static inline unsigned int chkquot_hash(qid_t id, int type)
1666 {
1667         return (id * (MAXQUOTAS - type)) % NR_DQHASH;
1668 }
1669
1670 static inline struct chk_dqblk *
1671 find_chkquot(cfs_hlist_head_t *head, qid_t id, int type)
1672 {
1673         cfs_hlist_node_t *node;
1674         struct chk_dqblk *cdqb;
1675
1676         cfs_hlist_for_each(node, head) {
1677                 cdqb = cfs_hlist_entry(node, struct chk_dqblk, dqb_hash);
1678                 if (cdqb->dqb_id == id && cdqb->dqb_type == type)
1679                         return cdqb;
1680         }
1681
1682         return NULL;
1683 }
1684
1685 static struct chk_dqblk *alloc_chkquot(qid_t id, int type)
1686 {
1687         struct chk_dqblk *cdqb;
1688
1689         OBD_ALLOC_PTR(cdqb);
1690         if (cdqb) {
1691                 CFS_INIT_HLIST_NODE(&cdqb->dqb_hash);
1692                 CFS_INIT_LIST_HEAD(&cdqb->dqb_list);
1693                 cdqb->dqb_id = id;
1694                 cdqb->dqb_type = type;
1695         }
1696
1697         return cdqb;
1698 }
1699
1700 static struct chk_dqblk *
1701 cqget(struct super_block *sb, cfs_hlist_head_t *hash,
1702       cfs_list_t *list, qid_t id, int type, int first_check)
1703 {
1704         cfs_hlist_head_t *head = hash + chkquot_hash(id, type);
1705         struct if_dqblk dqb;
1706         struct chk_dqblk *cdqb;
1707         int rc;
1708
1709         cdqb = find_chkquot(head, id, type);
1710         if (cdqb)
1711                 return cdqb;
1712
1713         cdqb = alloc_chkquot(id, type);
1714         if (!cdqb)
1715                 return NULL;
1716
1717         if (!first_check) {
1718                 rc = sb->s_qcop->get_dqblk(sb, type, id, &dqb);
1719                 if (rc) {
1720                         CERROR("get_dqblk of id %u, type %d failed: %d\n",
1721                                id, type, rc);
1722                 } else {
1723                         DQBLK_COPY(cdqb, &dqb);
1724                         cdqb->dqb_curspace = 0;
1725                         cdqb->dqb_curinodes = 0;
1726                 }
1727         }
1728
1729         cfs_hlist_add_head(&cdqb->dqb_hash, head);
1730         cfs_list_add_tail(&cdqb->dqb_list, list);
1731
1732         return cdqb;
1733 }
1734
1735 static inline int quota_onoff(struct super_block *sb, int cmd, int type, int qfmt)
1736 {
1737         struct obd_quotactl *oqctl;
1738         int rc;
1739
1740         OBD_ALLOC_PTR(oqctl);
1741         if (!oqctl)
1742                 RETURN(-ENOMEM);
1743
1744         oqctl->qc_cmd = cmd;
1745         oqctl->qc_id = qfmt;
1746         oqctl->qc_type = type;
1747         rc = fsfilt_ext3_quotactl(sb, oqctl);
1748
1749         OBD_FREE_PTR(oqctl);
1750         return rc;
1751 }
1752
1753 static inline int read_old_dqinfo(struct super_block *sb, int type,
1754                                   struct if_dqinfo *dqinfo)
1755 {
1756         struct obd_quotactl *oqctl;
1757         int rc;
1758         ENTRY;
1759
1760         OBD_ALLOC_PTR(oqctl);
1761         if (!oqctl)
1762                 RETURN(-ENOMEM);
1763
1764         oqctl->qc_cmd = Q_GETINFO;
1765         oqctl->qc_type = type;
1766         rc = fsfilt_ext3_quotactl(sb, oqctl);
1767         if (!rc)
1768                 ((struct obd_dqinfo *)dqinfo)[type] = oqctl->qc_dqinfo;
1769
1770         OBD_FREE_PTR(oqctl);
1771         RETURN(rc);
1772 }
1773
1774 #ifndef HAVE_EXT4_LDISKFS
1775 static inline struct ext3_group_desc *
1776 get_group_desc(struct super_block *sb, int group, struct buffer_head **bh)
1777 {
1778         unsigned long desc_block, desc;
1779         struct ext3_group_desc *gdp;
1780
1781         desc_block = group / EXT3_DESC_PER_BLOCK(sb);
1782         desc = group % EXT3_DESC_PER_BLOCK(sb);
1783         gdp = (struct ext3_group_desc *)
1784               EXT3_SB(sb)->s_group_desc[desc_block]->b_data;
1785
1786         return gdp + desc;
1787 }
1788
1789 static inline struct buffer_head *
1790 ext3_read_inode_bitmap(struct super_block *sb, unsigned long group)
1791 {
1792         struct ext3_group_desc *desc;
1793         struct buffer_head *bh;
1794
1795         desc = get_group_desc(sb, group, NULL);
1796         bh = sb_bread(sb, ext3_inode_bitmap(sb, desc));
1797         return bh;
1798 }
1799
1800 static __u32 ext3_itable_unused_count(struct super_block *sb,
1801                                struct ext3_group_desc *bg) {
1802        return le16_to_cpu(bg->bg_itable_unused);
1803 }
1804 #else
1805 #define get_group_desc ext3_get_group_desc
1806 #endif
1807
1808 struct qchk_ctxt {
1809         cfs_hlist_head_t        qckt_hash[NR_DQHASH];      /* quotacheck hash */
1810         cfs_list_t              qckt_list;                 /* quotacheck list */
1811         int                     qckt_first_check[MAXQUOTAS]; /* 1 if no old quotafile */
1812         struct if_dqinfo        qckt_dqinfo[MAXQUOTAS];    /* old dqinfo */
1813 };
1814
1815 static int add_inode_quota(struct inode *inode, struct qchk_ctxt *qctxt,
1816                            struct obd_quotactl *oqc)
1817 {
1818         struct chk_dqblk *cdqb[MAXQUOTAS] = { NULL, };
1819         loff_t size = 0;
1820         qid_t qid[MAXQUOTAS];
1821         int cnt, i, rc = 0;
1822
1823         if (!inode)
1824                 return 0;
1825
1826         qid[USRQUOTA] = inode->i_uid;
1827         qid[GRPQUOTA] = inode->i_gid;
1828
1829         if (S_ISDIR(inode->i_mode) ||
1830             S_ISREG(inode->i_mode) ||
1831             S_ISLNK(inode->i_mode))
1832                 size = inode_get_bytes(inode);
1833
1834         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
1835                 if (!Q_TYPESET(oqc, cnt))
1836                         continue;
1837
1838                 cdqb[cnt] = cqget(inode->i_sb, qctxt->qckt_hash,
1839                                 &qctxt->qckt_list, qid[cnt], cnt,
1840                                 qctxt->qckt_first_check[cnt]);
1841                 if (!cdqb[cnt]) {
1842                         rc = -ENOMEM;
1843                         break;
1844                 }
1845
1846                 cdqb[cnt]->dqb_curspace += size;
1847                 cdqb[cnt]->dqb_curinodes++;
1848         }
1849
1850         if (rc) {
1851                 for (i = 0; i < cnt; i++) {
1852                         if (!Q_TYPESET(oqc, i))
1853                                 continue;
1854                         LASSERT(cdqb[i]);
1855                         cdqb[i]->dqb_curspace -= size;
1856                         cdqb[i]->dqb_curinodes--;
1857                 }
1858         }
1859
1860         return rc;
1861 }
1862
1863 /* write dqinfo struct in a new quota file */
1864 static int v3_write_dqinfo(struct file *f, int type, struct if_dqinfo *info)
1865 {
1866         struct v2_disk_dqinfo dqinfo;
1867         __u32 blocks = V2_DQTREEOFF + 1;
1868         loff_t offset = V2_DQINFOOFF;
1869
1870         if (info) {
1871                 dqinfo.dqi_bgrace = cpu_to_le32(info->dqi_bgrace);
1872                 dqinfo.dqi_igrace = cpu_to_le32(info->dqi_igrace);
1873                 dqinfo.dqi_flags = cpu_to_le32(info->dqi_flags & DQF_MASK &
1874                                                ~DQF_INFO_DIRTY);
1875         } else {
1876                 dqinfo.dqi_bgrace = cpu_to_le32(MAX_DQ_TIME);
1877                 dqinfo.dqi_igrace = cpu_to_le32(MAX_IQ_TIME);
1878                 dqinfo.dqi_flags = 0;
1879         }
1880
1881         dqinfo.dqi_blocks = cpu_to_le32(blocks);
1882         dqinfo.dqi_free_blk = 0;
1883         dqinfo.dqi_free_entry = 0;
1884
1885         return cfs_user_write(f, (char *)&dqinfo, sizeof(dqinfo), &offset);
1886 }
1887
1888 static int v3_write_dqheader(struct file *f, int type)
1889 {
1890         static const __u32 quota_magics[] = V2_INITQMAGICS;
1891         static const __u32 quota_versions[] = LUSTRE_INITQVERSIONS_V2;
1892         struct v2_disk_dqheader dqhead;
1893         loff_t offset = 0;
1894
1895         CLASSERT(ARRAY_SIZE(quota_magics) == ARRAY_SIZE(quota_versions));
1896         LASSERT(0 <= type && type < ARRAY_SIZE(quota_magics));
1897
1898         dqhead.dqh_magic = cpu_to_le32(quota_magics[type]);
1899         dqhead.dqh_version = cpu_to_le32(quota_versions[type]);
1900
1901         return cfs_user_write(f, (char *)&dqhead, sizeof(dqhead), &offset);
1902 }
1903
1904 static int create_new_quota_files(struct qchk_ctxt *qctxt,
1905                                   struct obd_quotactl *oqc)
1906 {
1907         int i, rc = 0;
1908         ENTRY;
1909
1910         for (i = 0; i < MAXQUOTAS; i++) {
1911                 struct if_dqinfo *info = qctxt->qckt_first_check[i]?
1912                                          NULL : &qctxt->qckt_dqinfo[i];
1913                 struct file *file;
1914                 const char *name[MAXQUOTAS] = LUSTRE_OPQFILES_NAMES_V2;
1915
1916                 if (!Q_TYPESET(oqc, i))
1917                         continue;
1918
1919                 LASSERT(oqc->qc_id == LUSTRE_QUOTA_V2);
1920
1921                 file = filp_open(name[i], O_RDWR | O_CREAT | O_TRUNC, 0644);
1922                 if (IS_ERR(file)) {
1923                         rc = PTR_ERR(file);
1924                         CERROR("can't create %s file: rc = %d\n",
1925                                name[i], rc);
1926                         GOTO(out, rc);
1927                 }
1928
1929                 if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
1930                         CERROR("file %s is not regular", name[i]);
1931                         filp_close(file, 0);
1932                         GOTO(out, rc = -EINVAL);
1933                 }
1934
1935                 ll_vfs_dq_drop(file->f_dentry->d_inode);
1936
1937                 rc = v3_write_dqheader(file, i);
1938                 if (rc) {
1939                         filp_close(file, 0);
1940                         GOTO(out, rc);
1941                 }
1942
1943                 rc = v3_write_dqinfo(file, i, info);
1944                 filp_close(file, 0);
1945                 if (rc)
1946                         GOTO(out, rc);
1947         }
1948
1949 out:
1950         RETURN(rc);
1951 }
1952
1953
1954 static int commit_chkquot(struct super_block *sb, struct qchk_ctxt *qctxt,
1955                           struct chk_dqblk *cdqb)
1956 {
1957         struct obd_quotactl *oqc;
1958         long now;
1959         int rc;
1960         ENTRY;
1961
1962         OBD_ALLOC_PTR(oqc);
1963         if (!oqc)
1964                 RETURN(-ENOMEM);
1965
1966         now = cfs_time_current_sec();
1967
1968         if (cdqb->dqb_bsoftlimit &&
1969             toqb(cdqb->dqb_curspace) >= cdqb->dqb_bsoftlimit &&
1970             !cdqb->dqb_btime)
1971                 cdqb->dqb_btime =
1972                         now + qctxt->qckt_dqinfo[cdqb->dqb_type].dqi_bgrace;
1973
1974         if (cdqb->dqb_isoftlimit &&
1975             cdqb->dqb_curinodes >= cdqb->dqb_isoftlimit &&
1976             !cdqb->dqb_itime)
1977                 cdqb->dqb_itime =
1978                         now + qctxt->qckt_dqinfo[cdqb->dqb_type].dqi_igrace;
1979
1980         cdqb->dqb_valid = QIF_ALL;
1981
1982         oqc->qc_cmd = Q_SETQUOTA;
1983         oqc->qc_type = cdqb->dqb_type;
1984         oqc->qc_id = cdqb->dqb_id;
1985         DQBLK_COPY(&oqc->qc_dqblk, cdqb);
1986
1987         rc = fsfilt_ext3_quotactl(sb, oqc);
1988         OBD_FREE_PTR(oqc);
1989         RETURN(rc);
1990 }
1991
1992 static int prune_chkquots(struct super_block *sb,
1993                           struct qchk_ctxt *qctxt, int error)
1994 {
1995         struct chk_dqblk *cdqb, *tmp;
1996         int rc;
1997
1998         cfs_list_for_each_entry_safe(cdqb, tmp, &qctxt->qckt_list, dqb_list) {
1999                 if (!error) {
2000                         rc = commit_chkquot(sb, qctxt, cdqb);
2001                         if (rc)
2002                                 error = rc;
2003                 }
2004                 cfs_hlist_del_init(&cdqb->dqb_hash);
2005                 cfs_list_del(&cdqb->dqb_list);
2006                 OBD_FREE_PTR(cdqb);
2007         }
2008
2009         return error;
2010 }
2011
2012 #ifndef EXT3_FEATURE_RO_COMPAT_GDT_CSUM
2013 #define EXT3_FEATURE_RO_COMPAT_GDT_CSUM 0x0010
2014 #endif
2015
2016 static int fsfilt_ext3_quotacheck(struct super_block *sb,
2017                                   struct obd_quotactl *oqc)
2018 {
2019         struct ext3_sb_info *sbi = EXT3_SB(sb);
2020         int i, group, uninit_feat = 0;
2021         struct qchk_ctxt *qctxt;
2022         struct buffer_head *bitmap_bh = NULL;
2023         unsigned long ino, inode_inuse;
2024         struct inode *inode;
2025         int rc = 0;
2026         ENTRY;
2027
2028         /* turn on quota and read dqinfo if existed */
2029         OBD_ALLOC_PTR(qctxt);
2030         if (!qctxt) {
2031                 oqc->qc_stat = -ENOMEM;
2032                 RETURN(-ENOMEM);
2033         }
2034
2035         for (i = 0; i < NR_DQHASH; i++)
2036                 CFS_INIT_HLIST_HEAD(&qctxt->qckt_hash[i]);
2037         CFS_INIT_LIST_HEAD(&qctxt->qckt_list);
2038
2039         for (i = 0; i < MAXQUOTAS; i++) {
2040                 if (!Q_TYPESET(oqc, i))
2041                         continue;
2042
2043                 rc = quota_onoff(sb, Q_QUOTAON, i, oqc->qc_id);
2044                 if (!rc || rc == -EBUSY) {
2045                         rc = read_old_dqinfo(sb, i, qctxt->qckt_dqinfo);
2046                         if (rc)
2047                                 GOTO(out, rc);
2048                 } else if (rc == -ENOENT || rc == -EINVAL || rc == -EEXIST) {
2049                         qctxt->qckt_first_check[i] = 1;
2050                 } else if (rc) {
2051                         GOTO(out, rc);
2052                 }
2053         }
2054         if (EXT3_HAS_RO_COMPAT_FEATURE(sb, EXT3_FEATURE_RO_COMPAT_GDT_CSUM))
2055                 /* This filesystem supports the uninit group feature */
2056                 uninit_feat = 1;
2057
2058         /* number of inodes that have been allocated */
2059         inode_inuse = sbi->s_inodes_per_group * sbi->s_groups_count -
2060                       percpu_counter_sum(&sbi->s_freeinodes_counter);
2061
2062         /* check quota and update in hash */
2063         for (group = 0; group < sbi->s_groups_count && inode_inuse > 0;
2064              group++) {
2065                 unsigned long used_count = sbi->s_inodes_per_group;
2066
2067                 if (uninit_feat) {
2068                         struct ext3_group_desc *desc;
2069                         desc = get_group_desc(sb, group, NULL);
2070                         if (!desc)
2071                                 GOTO(out, -EIO);
2072
2073                         /* we don't really need to take the group lock here,
2074                          * but it may be useful if one day we support online
2075                          * quotacheck */
2076 #ifdef HAVE_EXT4_LDISKFS
2077                         ext4_lock_group(sb, group);
2078 #else
2079                         spin_lock(sb_bgl_lock(sbi, group));
2080 #endif
2081                         if (desc->bg_flags & cpu_to_le16(EXT3_BG_INODE_UNINIT)) {
2082                                 /* no inode in use in this group, just skip it */
2083 #ifdef HAVE_EXT4_LDISKFS
2084                                 ext3_unlock_group(sb, group);
2085 #else
2086                                 spin_unlock(sb_bgl_lock(sbi, group));
2087 #endif
2088                                 continue;
2089                         }
2090
2091                         used_count -= ext3_itable_unused_count(sb, desc);
2092 #ifdef HAVE_EXT4_LDISKFS
2093                         ext3_unlock_group(sb, group);
2094 #else
2095                         spin_unlock(sb_bgl_lock(sbi, group));
2096 #endif
2097                 }
2098
2099                 ino = group * sbi->s_inodes_per_group + 1;
2100                 bitmap_bh = ext3_read_inode_bitmap(sb, group);
2101                 if (!bitmap_bh) {
2102                         CERROR("%s: ext3_read_inode_bitmap group %d failed\n",
2103                                sb->s_id, group);
2104                         GOTO(out, -EIO);
2105                 }
2106
2107                 i = 0;
2108                 while (i < used_count &&
2109                        (i = ext3_find_next_bit(bitmap_bh->b_data,
2110                                                used_count, i)) < used_count) {
2111                         inode_inuse--;
2112                         i++;
2113                         ino = i + group * sbi->s_inodes_per_group;
2114                         if (ino < sbi->s_first_ino)
2115                                 continue;
2116 #if defined(HAVE_EXT4_LDISKFS) || !defined(HAVE_READ_INODE_IN_SBOPS)
2117                         inode = ext3_iget(sb, ino);
2118 #else
2119                         inode = iget(sb, ino);
2120 #endif
2121                         if (!inode || IS_ERR(inode))
2122                                 continue;
2123
2124                         rc = add_inode_quota(inode, qctxt, oqc);
2125                         iput(inode);
2126                         if (rc) {
2127                                 brelse(bitmap_bh);
2128                                 GOTO(out, rc);
2129                         }
2130                 }
2131                 brelse(bitmap_bh);
2132         }
2133
2134         /* read old quota limits from old quota file. (only for the user
2135          * has limits but hasn't file) */
2136 #ifdef HAVE_QUOTA_SUPPORT
2137         for (i = 0; i < MAXQUOTAS; i++) {
2138                 cfs_list_t id_list;
2139                 struct dquot_id *dqid, *tmp;
2140
2141                 if (!Q_TYPESET(oqc, i))
2142                         continue;
2143
2144                 if (qctxt->qckt_first_check[i])
2145                         continue;
2146
2147
2148                 LASSERT(sb_dqopt(sb)->files[i] != NULL);
2149                 CFS_INIT_LIST_HEAD(&id_list);
2150 #ifndef KERNEL_SUPPORTS_QUOTA_READ
2151                 rc = lustre_get_qids(sb_dqopt(sb)->files[i], NULL, i, &id_list);
2152 #else
2153                 rc = lustre_get_qids(NULL, sb_dqopt(sb)->files[i], i, &id_list);
2154 #endif
2155                 if (rc)
2156                         CERROR("read old limits failed. (rc:%d)\n", rc);
2157
2158                 cfs_list_for_each_entry_safe(dqid, tmp, &id_list, di_link) {
2159                         cfs_list_del_init(&dqid->di_link);
2160
2161                         if (!rc)
2162                                 cqget(sb, qctxt->qckt_hash, &qctxt->qckt_list,
2163                                       dqid->di_id, i,
2164                                       qctxt->qckt_first_check[i]);
2165                         OBD_FREE_PTR(dqid);
2166                 }
2167         }
2168 #endif
2169         /* turn off quota cause we are to dump chk_dqblk to files */
2170         quota_onoff(sb, Q_QUOTAOFF, oqc->qc_type, oqc->qc_id);
2171
2172         rc = create_new_quota_files(qctxt, oqc);
2173         if (rc)
2174                 GOTO(out, rc);
2175
2176         /* we use vfs functions to set dqblk, so turn quota on */
2177         rc = quota_onoff(sb, Q_QUOTAON, oqc->qc_type, oqc->qc_id);
2178 out:
2179         /* dump and free chk_dqblk */
2180         rc = prune_chkquots(sb, qctxt, rc);
2181         OBD_FREE_PTR(qctxt);
2182
2183         /* turn off quota, `lfs quotacheck` will turn on when all
2184          * nodes quotacheck finish. */
2185         quota_onoff(sb, Q_QUOTAOFF, oqc->qc_type, oqc->qc_id);
2186
2187         oqc->qc_stat = rc;
2188         if (rc)
2189                 CERROR("quotacheck failed: rc = %d\n", rc);
2190
2191         RETURN(rc);
2192 }
2193
2194 static int fsfilt_ext3_quotainfo(struct lustre_quota_info *lqi, int type,
2195                                  int cmd)
2196 {
2197         int rc = 0;
2198         ENTRY;
2199
2200         if (lqi->qi_files[type] == NULL) {
2201                 CERROR("operate qinfo before it's enabled!\n");
2202                 RETURN(-ESRCH);
2203         }
2204
2205         switch (cmd) {
2206         case QFILE_CHK:
2207                 rc = lustre_check_quota_file(lqi, type);
2208                 break;
2209         case QFILE_RD_INFO:
2210                 rc = lustre_read_quota_info(lqi, type);
2211                 break;
2212         case QFILE_WR_INFO:
2213                 rc = lustre_write_quota_info(lqi, type);
2214                 break;
2215         case QFILE_INIT_INFO:
2216                 rc = lustre_init_quota_info(lqi, type);
2217                 break;
2218         case QFILE_CONVERT:
2219                 rc = -ENOTSUPP;
2220                 CERROR("quota CONVERT command is not supported\n");
2221                 break;
2222         default:
2223                 rc = -ENOTSUPP;
2224                 CERROR("Unsupported admin quota file cmd %d\n"
2225                        "Are lquota.ko and fsfilt_ldiskfs.ko modules in sync?\n",
2226                        cmd);
2227                 break;
2228         }
2229         RETURN(rc);
2230 }
2231
2232 static int fsfilt_ext3_qids(struct file *file, struct inode *inode, int type,
2233                             cfs_list_t *list)
2234 {
2235         return lustre_get_qids(file, inode, type, list);
2236 }
2237
2238 static int fsfilt_ext3_dquot(struct lustre_dquot *dquot, int cmd)
2239 {
2240         int rc = 0;
2241         ENTRY;
2242
2243         if (dquot->dq_info->qi_files[dquot->dq_type] == NULL) {
2244                 CERROR("operate dquot before it's enabled!\n");
2245                 RETURN(-ESRCH);
2246         }
2247
2248         switch (cmd) {
2249         case QFILE_RD_DQUOT:
2250                 rc = lustre_read_dquot(dquot);
2251                 break;
2252         case QFILE_WR_DQUOT:
2253                 if (dquot->dq_dqb.dqb_ihardlimit ||
2254                     dquot->dq_dqb.dqb_isoftlimit ||
2255                     dquot->dq_dqb.dqb_bhardlimit ||
2256                     dquot->dq_dqb.dqb_bsoftlimit)
2257                         cfs_clear_bit(DQ_FAKE_B, &dquot->dq_flags);
2258                 else
2259                         cfs_set_bit(DQ_FAKE_B, &dquot->dq_flags);
2260
2261                 rc = lustre_commit_dquot(dquot);
2262                 if (rc >= 0)
2263                         rc = 0;
2264                 break;
2265         default:
2266                 CERROR("Unsupported admin quota file cmd %d\n", cmd);
2267                 LBUG();
2268                 break;
2269         }
2270         RETURN(rc);
2271 }
2272
2273 static int fsfilt_ext3_get_mblk(struct super_block *sb, int *count,
2274                                 struct inode *inode, int frags)
2275 {
2276 #ifdef EXT3_EXT_HAS_NO_TREE
2277         struct ext3_ext_base *base = inode;
2278 #else
2279         struct ext3_extents_tree tree;
2280         struct ext3_ext_base *base = &tree;
2281
2282         ext3_init_tree_desc(base, inode);
2283 #endif
2284         /* for an ost_write request, it needs <#fragments> * <tree depth + 1>
2285          * metablocks at maxium b=16542 */
2286         *count = frags * (EXT_DEPTH(base) + 1) * EXT3_BLOCK_SIZE(sb);
2287         return 0;
2288 }
2289
2290 #endif
2291
2292 lvfs_sbdev_type fsfilt_ext3_journal_sbdev(struct super_block *sb)
2293 {
2294         return (EXT3_SB(sb)->journal_bdev);
2295 }
2296 EXPORT_SYMBOL(fsfilt_ext3_journal_sbdev);
2297
2298 ssize_t lustre_read_quota(struct file *f, struct inode *inode, int type,
2299                           char *buf, int count, loff_t pos)
2300 {
2301         loff_t p = pos;
2302         int rc;
2303
2304         if (!f && !inode) {
2305                 CERROR("lustre_read_quota failed for no quota file!\n");
2306                 libcfs_debug_dumpstack(NULL);
2307                 return -EINVAL;
2308         }
2309
2310         /* Support for both adm and op quota files must be provided */
2311         if (f) {
2312                 rc = fsfilt_ext3_read_record(f, buf, count, &p);
2313                 rc = rc < 0 ? rc : p - pos;
2314         } else {
2315                 struct super_block *sb = inode->i_sb;
2316                 rc = sb->s_op->quota_read(sb, type, buf, count, pos);
2317         }
2318         return rc;
2319 }
2320
2321 ssize_t lustre_write_quota(struct file *f, char *buf, int count, loff_t pos)
2322 {
2323         loff_t p = pos;
2324         int rc;
2325
2326         /* Only adm quota files are supported, op updates are handled by vfs */
2327         rc = fsfilt_ext3_write_record(f, buf, count, &p, 0);
2328         rc = rc < 0 ? rc : p - pos;
2329
2330         return rc;
2331 }
2332
2333 void *lustre_quota_journal_start(struct inode *inode, int delete)
2334 {
2335         handle_t *handle;
2336         unsigned block_count;
2337
2338         if (delete) {
2339                 /* each indirect block (+4) may become free, attaching to the
2340                  * header list of free blocks (+1); the data block (+1) may
2341                  * become a free block (+0) or a block with free dqentries (+0) */
2342                 block_count = (4 + 1) + 1;
2343                 handle = ext3_journal_start(inode,
2344                             block_count*FSFILT_DATA_TRANS_BLOCKS(inode->i_sb)+2);
2345         } else {
2346                 /* indirect blocks are touched (+4), each causes file expansion (+0) or
2347                  * freeblk reusage with a header update (+1); dqentry is either reused
2348                  * causing update of the entry block (+1), prev (+1) and next (+1) or
2349                  * a new block allocation (+1) with a header update (+1)              */
2350                 block_count = (4 + 1) + 3;
2351                 handle = ext3_journal_start(inode,
2352                              block_count*FSFILT_DATA_TRANS_BLOCKS(inode->i_sb)+2);
2353
2354         }
2355
2356         return handle;
2357 }
2358
2359 void lustre_quota_journal_stop(void *handle)
2360 {
2361         ext3_journal_stop((handle_t *)handle);
2362 }
2363
2364 static int ll_decode_fh_accept(void *context, struct dentry *de)
2365 {
2366         return 1;
2367 }
2368
2369 #ifdef HAVE_EXPORTFS_DECODE_FH
2370 # define ll_exportfs_decode_fh(mnt, fid, len, type, acceptable, context) \
2371          exportfs_decode_fh(mnt, (struct fid*)(fid), len, type,          \
2372                             acceptable, context)
2373 #else
2374 # define ll_exportfs_decode_fh(mnt, fid, len, type, acceptable, context) \
2375          export_op_default.decode_fh((mnt)->mnt_sb, &(fid)->ino, len,    \
2376                                      type, acceptable, context)
2377 # define FILEID_INO32_GEN 1
2378 extern struct export_operations export_op_default;
2379 #endif
2380
2381 struct dentry *fsfilt_ext3_fid2dentry(struct vfsmount *mnt,
2382                                       struct fsfilt_fid *fid, int ignore_gen)
2383 {
2384         struct inode  *inode;
2385         struct dentry *result;
2386         
2387         result = ll_exportfs_decode_fh(mnt, fid, 2, FILEID_INO32_GEN,
2388                                        ll_decode_fh_accept, NULL);
2389         if (IS_ERR(result)) {
2390                 CDEBUG(D_DENTRY, "%s of %u/%u failed %ld\n", __func__,
2391                        fid->ino, fid->gen, PTR_ERR(result));
2392                 return result;
2393         }
2394
2395         CDEBUG(D_DENTRY, "%s of %u/%u succeeded\n", __func__,
2396                fid->ino, fid->gen);
2397         inode = result->d_inode;
2398         if (inode == NULL)
2399                 goto err_out;
2400
2401         if (inode->i_nlink == 0 &&
2402             inode->i_mode == 0 && LTIME_S(inode->i_ctime) == 0) {
2403                 LCONSOLE_WARN("Found inode with zero nlink, mode and"
2404                               " ctime -- this may indicate disk "
2405                               "corruption (inode: %lu, link: %lu, "
2406                               "count: %d)\n", inode->i_ino,
2407                               (unsigned long)inode->i_nlink,
2408                               atomic_read(&inode->i_count));
2409                 goto err_out;
2410         }
2411         if (fid->gen && inode->i_generation != fid->gen) {
2412                 /* we didn't find the right inode.. */
2413                 CDEBUG(D_INODE, "found wrong generation: inode %lu, link: %lu, "
2414                        "count: %d, generation %u/%u\n",
2415                        inode->i_ino, (unsigned long)inode->i_nlink,
2416                        atomic_read(&inode->i_count), inode->i_generation,
2417                        fid->gen);
2418                 goto err_out;
2419         }
2420
2421         return result;
2422 err_out:
2423         l_dput(result);
2424         return ERR_PTR(-ENOENT);
2425 }
2426
2427 static struct fsfilt_operations fsfilt_ext3_ops = {
2428         .fs_type                = "ext3",
2429         .fs_owner               = THIS_MODULE,
2430         .fs_getlabel            = fsfilt_ext3_get_label,
2431         .fs_setlabel            = fsfilt_ext3_set_label,
2432         .fs_uuid                = fsfilt_ext3_uuid,
2433         .fs_start               = fsfilt_ext3_start,
2434         .fs_brw_start           = fsfilt_ext3_brw_start,
2435         .fs_extend              = fsfilt_ext3_extend,
2436         .fs_commit              = fsfilt_ext3_commit,
2437         .fs_commit_async        = fsfilt_ext3_commit_async,
2438         .fs_commit_wait         = fsfilt_ext3_commit_wait,
2439         .fs_setattr             = fsfilt_ext3_setattr,
2440         .fs_iocontrol           = fsfilt_ext3_iocontrol,
2441         .fs_set_md              = fsfilt_ext3_set_md,
2442         .fs_get_md              = fsfilt_ext3_get_md,
2443         .fs_readpage            = fsfilt_ext3_readpage,
2444         .fs_add_journal_cb      = fsfilt_ext3_add_journal_cb,
2445         .fs_statfs              = fsfilt_ext3_statfs,
2446         .fs_sync                = fsfilt_ext3_sync,
2447         .fs_map_inode_pages     = fsfilt_ext3_map_inode_pages,
2448         .fs_write_record        = fsfilt_ext3_write_record,
2449         .fs_read_record         = fsfilt_ext3_read_record,
2450         .fs_setup               = fsfilt_ext3_setup,
2451         .fs_send_bio            = fsfilt_ext3_send_bio,
2452         .fs_get_op_len          = fsfilt_ext3_get_op_len,
2453 #ifdef HAVE_DISK_INODE_VERSION
2454         .fs_get_version         = fsfilt_ext3_get_version,
2455         .fs_set_version         = fsfilt_ext3_set_version,
2456 #endif
2457 #ifdef HAVE_QUOTA_SUPPORT
2458         .fs_quotactl            = fsfilt_ext3_quotactl,
2459         .fs_quotacheck          = fsfilt_ext3_quotacheck,
2460         .fs_quotainfo           = fsfilt_ext3_quotainfo,
2461         .fs_qids                = fsfilt_ext3_qids,
2462         .fs_dquot               = fsfilt_ext3_dquot,
2463         .fs_get_mblk            = fsfilt_ext3_get_mblk,
2464 #endif
2465         .fs_journal_sbdev       = fsfilt_ext3_journal_sbdev,
2466         .fs_fid2dentry          = fsfilt_ext3_fid2dentry,
2467 };
2468
2469 static int __init fsfilt_ext3_init(void)
2470 {
2471         int rc;
2472
2473         fcb_cache = cfs_mem_cache_create("fsfilt_ext3_fcb",
2474                                          sizeof(struct fsfilt_cb_data), 0, 0);
2475         if (!fcb_cache) {
2476                 CERROR("error allocating fsfilt journal callback cache\n");
2477                 GOTO(out, rc = -ENOMEM);
2478         }
2479
2480         rc = fsfilt_register_ops(&fsfilt_ext3_ops);
2481
2482         if (rc) {
2483                 int err = cfs_mem_cache_destroy(fcb_cache);
2484                 LASSERTF(err == 0, "error destroying new cache: rc %d\n", err);
2485         }
2486 out:
2487         return rc;
2488 }
2489
2490 static void __exit fsfilt_ext3_exit(void)
2491 {
2492         int rc;
2493
2494         fsfilt_unregister_ops(&fsfilt_ext3_ops);
2495         rc = cfs_mem_cache_destroy(fcb_cache);
2496         LASSERTF(rc == 0, "couldn't destroy fcb_cache slab\n");
2497 }
2498
2499 module_init(fsfilt_ext3_init);
2500 module_exit(fsfilt_ext3_exit);
2501
2502 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
2503 MODULE_DESCRIPTION("Lustre ext3 Filesystem Helper v0.1");
2504 MODULE_LICENSE("GPL");