1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * lustre/lib/fsfilt_ext3.c
5 * Lustre filesystem abstraction routines
7 * Copyright (C) 2002, 2003 Cluster File Systems, Inc.
8 * Author: Andreas Dilger <adilger@clusterfs.com>
10 * This file is part of Lustre, http://www.lustre.org.
12 * Lustre is free software; you can redistribute it and/or
13 * modify it under the terms of version 2 of the GNU General Public
14 * License as published by the Free Software Foundation.
16 * Lustre is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with Lustre; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 #define DEBUG_SUBSYSTEM S_FILTER
28 #include <linux/init.h>
29 #include <linux/module.h>
31 #include <linux/jbd.h>
32 #include <linux/slab.h>
33 #include <linux/pagemap.h>
34 #include <linux/quotaops.h>
35 #include <linux/ext3_fs.h>
36 #include <linux/ext3_jbd.h>
37 #include <linux/version.h>
38 #include <linux/bitops.h>
39 #include <linux/quota.h>
40 #include <linux/quotaio_v1.h>
41 #include <linux/quotaio_v2.h>
42 #include <ext3/xattr.h>
44 #include <libcfs/kp30.h>
45 #include <lustre_fsfilt.h>
47 #include <lustre_quota.h>
48 #include <linux/lustre_compat25.h>
49 #include <linux/lprocfs_status.h>
51 #ifdef EXT3_MULTIBLOCK_ALLOCATOR
52 #include <linux/ext3_extents.h>
55 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15)
56 #define FSFILT_DATA_TRANS_BLOCKS(sb) EXT3_DATA_TRANS_BLOCKS
57 #define FSFILT_DELETE_TRANS_BLOCKS(sb) EXT3_DELETE_TRANS_BLOCKS
59 #define FSFILT_DATA_TRANS_BLOCKS(sb) EXT3_DATA_TRANS_BLOCKS(sb)
60 #define FSFILT_DELETE_TRANS_BLOCKS(sb) EXT3_DELETE_TRANS_BLOCKS(sb)
63 #ifdef EXT3_SINGLEDATA_TRANS_BLOCKS_HAS_SB
64 /* for kernels 2.6.18 and later */
65 #define FSFILT_SINGLEDATA_TRANS_BLOCKS(sb) EXT3_SINGLEDATA_TRANS_BLOCKS(sb)
67 #define FSFILT_SINGLEDATA_TRANS_BLOCKS(sb) EXT3_SINGLEDATA_TRANS_BLOCKS
70 #define fsfilt_ext3_journal_start(inode, nblocks) ext3_journal_start(inode, nblocks)
71 #define fsfilt_ext3_journal_stop(handle) ext3_journal_stop(handle)
73 static cfs_mem_cache_t *fcb_cache;
75 struct fsfilt_cb_data {
76 struct journal_callback cb_jcb; /* jbd private data - MUST BE FIRST */
77 fsfilt_cb_t cb_func; /* MDS/OBD completion function */
78 struct obd_device *cb_obd; /* MDS/OBD completion device */
79 __u64 cb_last_rcvd; /* MDS/OST last committed operation */
80 void *cb_data; /* MDS/OST completion function data */
83 #ifndef EXT3_XATTR_INDEX_TRUSTED /* temporary until we hit l28 kernel */
84 #define EXT3_XATTR_INDEX_TRUSTED 4
87 static char *fsfilt_ext3_get_label(struct super_block *sb)
89 return EXT3_SB(sb)->s_es->s_volume_name;
92 static int fsfilt_ext3_set_label(struct super_block *sb, char *label)
94 /* see e.g. fsfilt_ext3_write_record() */
99 journal = EXT3_SB(sb)->s_journal;
100 handle = journal_start(journal, 1);
101 if (IS_ERR(handle)) {
102 CERROR("can't start transaction\n");
103 return(PTR_ERR(handle));
106 err = ext3_journal_get_write_access(handle, EXT3_SB(sb)->s_sbh);
110 memcpy(EXT3_SB(sb)->s_es->s_volume_name, label,
111 sizeof(EXT3_SB(sb)->s_es->s_volume_name));
113 err = ext3_journal_dirty_metadata(handle, EXT3_SB(sb)->s_sbh);
116 journal_stop(handle);
121 static char *fsfilt_ext3_uuid(struct super_block *sb)
123 return EXT3_SB(sb)->s_es->s_uuid;
126 #ifdef HAVE_DISK_INODE_VERSION
128 * Get the 64-bit version for an inode.
130 static __u64 fsfilt_ext3_get_version(struct inode *inode)
132 return EXT3_I(inode)->i_fs_version;
136 * Set the 64-bit version and return the old version.
138 static __u64 fsfilt_ext3_set_version(struct inode *inode, __u64 new_version)
140 __u64 old_version = EXT3_I(inode)->i_fs_version;
142 (EXT3_I(inode))->i_fs_version = new_version;
149 * We don't currently need any additional blocks for rmdir and
150 * unlink transactions because we are storing the OST oa_id inside
151 * the inode (which we will be changing anyways as part of this
154 static void *fsfilt_ext3_start(struct inode *inode, int op, void *desc_private,
157 /* For updates to the last received file */
158 int nblocks = FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb);
162 if (current->journal_info) {
163 CDEBUG(D_INODE, "increasing refcount on %p\n",
164 current->journal_info);
169 case FSFILT_OP_RMDIR:
170 case FSFILT_OP_UNLINK:
171 /* delete one file + create/update logs for each stripe */
172 nblocks += FSFILT_DELETE_TRANS_BLOCKS(inode->i_sb);
173 nblocks += (EXT3_INDEX_EXTRA_TRANS_BLOCKS +
174 FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb)) * logs;
176 case FSFILT_OP_RENAME:
177 /* modify additional directory */
178 nblocks += FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb);
180 case FSFILT_OP_SYMLINK:
181 /* additional block + block bitmap + GDT for long symlink */
184 case FSFILT_OP_CREATE: {
185 #if defined(EXT3_EXTENTS_FL) && defined(EXT3_INDEX_FL)
188 if (!test_opt(inode->i_sb, EXTENTS)) {
190 } else if (((EXT3_I(inode)->i_flags &
191 cpu_to_le32(EXT3_EXTENTS_FL | EXT3_INDEX_FL)) ==
192 cpu_to_le32(EXT3_EXTENTS_FL | EXT3_INDEX_FL))) {
193 CWARN("extent-mapped directory found - contact "
194 "CFS: support@clusterfs.com\n");
201 case FSFILT_OP_MKDIR:
202 case FSFILT_OP_MKNOD:
203 /* modify one inode + block bitmap + GDT */
207 /* modify parent directory */
208 nblocks += EXT3_INDEX_EXTRA_TRANS_BLOCKS +
209 FSFILT_DATA_TRANS_BLOCKS(inode->i_sb);
210 /* create/update logs for each stripe */
211 nblocks += (EXT3_INDEX_EXTRA_TRANS_BLOCKS +
212 FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb)) * logs;
214 case FSFILT_OP_SETATTR:
215 /* Setattr on inode */
217 nblocks += EXT3_INDEX_EXTRA_TRANS_BLOCKS +
218 FSFILT_DATA_TRANS_BLOCKS(inode->i_sb);
219 /* quota chown log for each stripe */
220 nblocks += (EXT3_INDEX_EXTRA_TRANS_BLOCKS +
221 FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb)) * logs;
223 case FSFILT_OP_CANCEL_UNLINK:
224 /* blocks for log header bitmap update OR
225 * blocks for catalog header bitmap update + unlink of logs */
226 nblocks = (LLOG_CHUNK_SIZE >> inode->i_blkbits) +
227 FSFILT_DELETE_TRANS_BLOCKS(inode->i_sb) * logs;
230 /* delete 2 file(file + array id) + create 1 file (array id)
231 * create/update logs for each stripe */
232 nblocks += 2 * FSFILT_DELETE_TRANS_BLOCKS(inode->i_sb);
234 /*create array log for head file*/
236 nblocks += (EXT3_INDEX_EXTRA_TRANS_BLOCKS +
237 FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb));
238 /*update head file array */
239 nblocks += EXT3_INDEX_EXTRA_TRANS_BLOCKS +
240 FSFILT_DATA_TRANS_BLOCKS(inode->i_sb);
242 default: CERROR("unknown transaction start op %d\n", op);
246 LASSERT(current->journal_info == desc_private);
247 journal = EXT3_SB(inode->i_sb)->s_journal;
248 if (nblocks > journal->j_max_transaction_buffers) {
249 CWARN("too many credits %d for op %ux%u using %d instead\n",
250 nblocks, op, logs, journal->j_max_transaction_buffers);
251 nblocks = journal->j_max_transaction_buffers;
255 LASSERTF(nblocks > 0, "can't start %d credit transaction\n", nblocks);
256 handle = fsfilt_ext3_journal_start(inode, nblocks);
259 LASSERT(current->journal_info == handle);
261 CERROR("error starting handle for op %u (%u credits): rc %ld\n",
262 op, nblocks, PTR_ERR(handle));
267 * Calculate the number of buffer credits needed to write multiple pages in
268 * a single ext3 transaction. No, this shouldn't be here, but as yet ext3
269 * doesn't have a nice API for calculating this sort of thing in advance.
271 * See comment above ext3_writepage_trans_blocks for details. We assume
272 * no data journaling is being done, but it does allow for all of the pages
273 * being non-contiguous. If we are guaranteed contiguous pages we could
274 * reduce the number of (d)indirect blocks a lot.
276 * With N blocks per page and P pages, for each inode we have at most:
278 * min(N*P, blocksize/4 + 1) dindirect blocks
281 * For the entire filesystem, we have at most:
282 * min(sum(nindir + P), ngroups) bitmap blocks (from the above)
283 * min(sum(nindir + P), gdblocks) group descriptor blocks (from the above)
284 * objcount inode blocks
286 * 2 * EXT3_SINGLEDATA_TRANS_BLOCKS for the quota files
288 * 1 EXT3_DATA_TRANS_BLOCKS for the last_rcvd update.
290 static int fsfilt_ext3_credits_needed(int objcount, struct fsfilt_objinfo *fso,
291 int niocount, struct niobuf_local *nb)
293 struct super_block *sb = fso->fso_dentry->d_inode->i_sb;
295 const int blockpp = 1 << (CFS_PAGE_SHIFT - sb->s_blocksize_bits);
296 int nbitmaps = 0, ngdblocks;
297 int needed = objcount + 1; /* inodes + superblock */
300 for (i = 0, j = 0; i < objcount; i++, fso++) {
301 /* two or more dindirect blocks in case we cross boundary */
302 int ndind = (long)((nb[j + fso->fso_bufcnt - 1].offset -
304 sb->s_blocksize_bits) /
305 (EXT3_ADDR_PER_BLOCK(sb) * EXT3_ADDR_PER_BLOCK(sb));
306 nbitmaps += min(fso->fso_bufcnt, ndind > 0 ? ndind : 2);
308 /* leaf, indirect, tindirect blocks for first block */
309 nbitmaps += blockpp + 2;
311 j += fso->fso_bufcnt;
314 next_indir = nb[0].offset +
315 (EXT3_ADDR_PER_BLOCK(sb) << sb->s_blocksize_bits);
316 for (i = 1; i < niocount; i++) {
317 if (nb[i].offset >= next_indir) {
318 nbitmaps++; /* additional indirect */
319 next_indir = nb[i].offset +
320 (EXT3_ADDR_PER_BLOCK(sb)<<sb->s_blocksize_bits);
321 } else if (nb[i].offset != nb[i - 1].offset + sb->s_blocksize) {
322 nbitmaps++; /* additional indirect */
324 nbitmaps += blockpp; /* each leaf in different group? */
327 ngdblocks = nbitmaps;
328 if (nbitmaps > EXT3_SB(sb)->s_groups_count)
329 nbitmaps = EXT3_SB(sb)->s_groups_count;
330 if (ngdblocks > EXT3_SB(sb)->s_gdb_count)
331 ngdblocks = EXT3_SB(sb)->s_gdb_count;
333 needed += nbitmaps + ngdblocks;
335 /* last_rcvd update */
336 needed += FSFILT_DATA_TRANS_BLOCKS(sb);
338 #if defined(CONFIG_QUOTA)
339 /* We assume that there will be 1 bit set in s_dquot.flags for each
340 * quota file that is active. This is at least true for now.
342 needed += hweight32(sb_any_quota_enabled(sb)) *
343 FSFILT_SINGLEDATA_TRANS_BLOCKS(sb);
349 /* We have to start a huge journal transaction here to hold all of the
350 * metadata for the pages being written here. This is necessitated by
351 * the fact that we do lots of prepare_write operations before we do
352 * any of the matching commit_write operations, so even if we split
353 * up to use "smaller" transactions none of them could complete until
354 * all of them were opened. By having a single journal transaction,
355 * we eliminate duplicate reservations for common blocks like the
356 * superblock and group descriptors or bitmaps.
358 * We will start the transaction here, but each prepare_write will
359 * add a refcount to the transaction, and each commit_write will
360 * remove a refcount. The transaction will be closed when all of
361 * the pages have been written.
363 static void *fsfilt_ext3_brw_start(int objcount, struct fsfilt_objinfo *fso,
364 int niocount, struct niobuf_local *nb,
365 void *desc_private, int logs)
372 LASSERT(current->journal_info == desc_private);
373 journal = EXT3_SB(fso->fso_dentry->d_inode->i_sb)->s_journal;
374 needed = fsfilt_ext3_credits_needed(objcount, fso, niocount, nb);
376 /* The number of blocks we could _possibly_ dirty can very large.
377 * We reduce our request if it is absurd (and we couldn't get that
378 * many credits for a single handle anyways).
380 * At some point we have to limit the size of I/Os sent at one time,
381 * increase the size of the journal, or we have to calculate the
382 * actual journal requirements more carefully by checking all of
383 * the blocks instead of being maximally pessimistic. It remains to
384 * be seen if this is a real problem or not.
386 if (needed > journal->j_max_transaction_buffers) {
387 CERROR("want too many journal credits (%d) using %d instead\n",
388 needed, journal->j_max_transaction_buffers);
389 needed = journal->j_max_transaction_buffers;
392 LASSERTF(needed > 0, "can't start %d credit transaction\n", needed);
393 handle = fsfilt_ext3_journal_start(fso->fso_dentry->d_inode, needed);
394 if (IS_ERR(handle)) {
395 CERROR("can't get handle for %d credits: rc = %ld\n", needed,
398 LASSERT(handle->h_buffer_credits >= needed);
399 LASSERT(current->journal_info == handle);
405 static int fsfilt_ext3_extend(struct inode *inode, unsigned int nblocks,void *h)
407 handle_t *handle = h;
409 /* fsfilt_extend called with nblocks = 0 for testing in special cases */
411 handle->h_buffer_credits = 0;
412 CWARN("setting credits of handle %p to zero by request\n", h);
415 if (handle->h_buffer_credits > nblocks)
417 if (journal_extend(handle, nblocks) == 0)
420 ext3_mark_inode_dirty(handle, inode);
421 return journal_restart(handle, nblocks);
424 static int fsfilt_ext3_commit(struct inode *inode, void *h, int force_sync)
427 handle_t *handle = h;
429 LASSERT(current->journal_info == handle);
431 handle->h_sync = 1; /* recovery likes this */
433 rc = fsfilt_ext3_journal_stop(handle);
438 static int fsfilt_ext3_commit_async(struct inode *inode, void *h,
442 transaction_t *transaction;
443 handle_t *handle = h;
447 LASSERT(current->journal_info == handle);
449 transaction = handle->h_transaction;
450 journal = transaction->t_journal;
451 tid = transaction->t_tid;
452 /* we don't want to be blocked */
454 rc = fsfilt_ext3_journal_stop(handle);
456 CERROR("error while stopping transaction: %d\n", rc);
459 log_start_commit(journal, tid);
461 *wait_handle = (void *) tid;
462 CDEBUG(D_INODE, "commit async: %lu\n", (unsigned long) tid);
466 static int fsfilt_ext3_commit_wait(struct inode *inode, void *h)
468 journal_t *journal = EXT3_JOURNAL(inode);
469 tid_t tid = (tid_t)(long)h;
471 CDEBUG(D_INODE, "commit wait: %lu\n", (unsigned long) tid);
472 if (unlikely(is_journal_aborted(journal)))
475 log_wait_commit(EXT3_JOURNAL(inode), tid);
477 if (unlikely(is_journal_aborted(journal)))
482 static int fsfilt_ext3_setattr(struct dentry *dentry, void *handle,
483 struct iattr *iattr, int do_trunc)
485 struct inode *inode = dentry->d_inode;
488 /* Avoid marking the inode dirty on the superblock list unnecessarily.
489 * We are already writing the inode to disk as part of this
490 * transaction and want to avoid a lot of extra inode writeout
491 * later on. b=9828 */
492 if (iattr->ia_valid & ATTR_SIZE && !do_trunc) {
493 /* ATTR_SIZE would invoke truncate: clear it */
494 iattr->ia_valid &= ~ATTR_SIZE;
495 EXT3_I(inode)->i_disksize = iattr->ia_size;
496 i_size_write(inode, iattr->ia_size);
498 if (iattr->ia_valid & ATTR_UID)
499 inode->i_uid = iattr->ia_uid;
500 if (iattr->ia_valid & ATTR_GID)
501 inode->i_gid = iattr->ia_gid;
502 if (iattr->ia_valid & ATTR_ATIME)
503 inode->i_atime = iattr->ia_atime;
504 if (iattr->ia_valid & ATTR_MTIME)
505 inode->i_mtime = iattr->ia_mtime;
506 if (iattr->ia_valid & ATTR_CTIME)
507 inode->i_ctime = iattr->ia_ctime;
508 if (iattr->ia_valid & ATTR_MODE) {
509 inode->i_mode = iattr->ia_mode;
511 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
512 inode->i_mode &= ~S_ISGID;
515 inode->i_sb->s_op->dirty_inode(inode);
520 /* Don't allow setattr to change file type */
521 if (iattr->ia_valid & ATTR_MODE)
522 iattr->ia_mode = (inode->i_mode & S_IFMT) |
523 (iattr->ia_mode & ~S_IFMT);
525 /* We set these flags on the client, but have already checked perms
526 * so don't confuse inode_change_ok. */
527 iattr->ia_valid &= ~(ATTR_MTIME_SET | ATTR_ATIME_SET);
529 if (inode->i_op->setattr) {
530 rc = inode->i_op->setattr(dentry, iattr);
532 rc = inode_change_ok(inode, iattr);
534 rc = inode_setattr(inode, iattr);
541 static int fsfilt_ext3_iocontrol(struct inode * inode, struct file *file,
542 unsigned int cmd, unsigned long arg)
547 /* FIXME: Can't do this because of nested transaction deadlock */
548 if (cmd == EXT3_IOC_SETFLAGS && (*(int *)arg) & EXT3_JOURNAL_DATA_FL) {
549 CERROR("can't set data journal flag on file\n");
553 if (inode->i_fop->ioctl)
554 rc = inode->i_fop->ioctl(inode, file, cmd, arg);
561 static int fsfilt_ext3_set_md(struct inode *inode, void *handle,
562 void *lmm, int lmm_size, const char *name)
566 LASSERT(TRYLOCK_INODE_MUTEX(inode) == 0);
568 rc = ext3_xattr_set_handle(handle, inode, EXT3_XATTR_INDEX_TRUSTED,
569 name, lmm, lmm_size, 0);
572 if (rc && rc != -EROFS)
573 CERROR("error adding MD data to inode %lu: rc = %d\n",
578 /* Must be called with i_mutex held */
579 static int fsfilt_ext3_get_md(struct inode *inode, void *lmm, int lmm_size,
584 LASSERT(TRYLOCK_INODE_MUTEX(inode) == 0);
586 rc = ext3_xattr_get(inode, EXT3_XATTR_INDEX_TRUSTED,
587 name, lmm, lmm_size);
589 /* This gives us the MD size */
591 return (rc == -ENODATA) ? 0 : rc;
594 CDEBUG(D_INFO, "error getting EA %d/%s from inode %lu: rc %d\n",
595 EXT3_XATTR_INDEX_TRUSTED, name,
597 memset(lmm, 0, lmm_size);
598 return (rc == -ENODATA) ? 0 : rc;
604 static int fsfilt_ext3_send_bio(int rw, struct inode *inode, struct bio *bio)
610 static ssize_t fsfilt_ext3_readpage(struct file *file, char *buf, size_t count,
613 struct inode *inode = file->f_dentry->d_inode;
616 if (S_ISREG(inode->i_mode))
617 rc = file->f_op->read(file, buf, count, off);
619 const int blkbits = inode->i_sb->s_blocksize_bits;
620 const int blksize = inode->i_sb->s_blocksize;
622 CDEBUG(D_EXT2, "reading "LPSZ" at dir %lu+%llu\n",
623 count, inode->i_ino, *off);
625 struct buffer_head *bh;
628 if (*off < i_size_read(inode)) {
631 bh = ext3_bread(NULL, inode, *off >> blkbits,
634 CDEBUG(D_EXT2, "read %u@%llu\n", blksize, *off);
637 memcpy(buf, bh->b_data, blksize);
640 /* XXX in theory we should just fake
641 * this buffer and continue like ext3,
642 * especially if this is a partial read
644 CERROR("error read dir %lu+%llu: %d\n",
645 inode->i_ino, *off, err);
650 struct ext3_dir_entry_2 *fake = (void *)buf;
652 CDEBUG(D_EXT2, "fake %u@%llu\n", blksize, *off);
653 memset(fake, 0, sizeof(*fake));
654 fake->rec_len = cpu_to_le16(blksize);
666 static void fsfilt_ext3_cb_func(struct journal_callback *jcb, int error)
668 struct fsfilt_cb_data *fcb = (struct fsfilt_cb_data *)jcb;
670 fcb->cb_func(fcb->cb_obd, fcb->cb_last_rcvd, fcb->cb_data, error);
672 OBD_SLAB_FREE(fcb, fcb_cache, sizeof *fcb);
675 static int fsfilt_ext3_add_journal_cb(struct obd_device *obd, __u64 last_rcvd,
676 void *handle, fsfilt_cb_t cb_func,
679 struct fsfilt_cb_data *fcb;
681 OBD_SLAB_ALLOC(fcb, fcb_cache, CFS_ALLOC_IO, sizeof *fcb);
685 fcb->cb_func = cb_func;
687 fcb->cb_last_rcvd = last_rcvd;
688 fcb->cb_data = cb_data;
690 CDEBUG(D_EXT2, "set callback for last_rcvd: "LPD64"\n", last_rcvd);
691 journal_callback_set(handle, fsfilt_ext3_cb_func,
692 (struct journal_callback *)fcb);
698 * We need to hack the return value for the free inode counts because
699 * the current EA code requires one filesystem block per inode with EAs,
700 * so it is possible to run out of blocks before we run out of inodes.
702 * This can be removed when the ext3 EA code is fixed.
704 static int fsfilt_ext3_statfs(struct super_block *sb, struct obd_statfs *osfs)
709 memset(&sfs, 0, sizeof(sfs));
711 rc = ll_do_statfs(sb, &sfs);
713 if (!rc && sfs.f_bfree < sfs.f_ffree) {
714 sfs.f_files = (sfs.f_files - sfs.f_ffree) + sfs.f_bfree;
715 sfs.f_ffree = sfs.f_bfree;
718 statfs_pack(osfs, &sfs);
722 static int fsfilt_ext3_sync(struct super_block *sb)
724 return ext3_force_commit(sb);
727 #if defined(EXT3_MULTIBLOCK_ALLOCATOR) && (!defined(EXT3_EXT_CACHE_NO) || defined(EXT_CACHE_MARK))
728 #warning "kernel code has old extents/mballoc patch, disabling"
729 #undef EXT3_MULTIBLOCK_ALLOCATOR
731 #ifndef EXT3_EXTENTS_FL
732 #define EXT3_EXTENTS_FL 0x00080000 /* Inode uses extents */
735 #ifdef EXT3_MULTIBLOCK_ALLOCATOR
736 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
737 #define ext3_up_truncate_sem(inode) up(&EXT3_I(inode)->truncate_sem);
738 #define ext3_down_truncate_sem(inode) down(&EXT3_I(inode)->truncate_sem);
740 #define ext3_up_truncate_sem(inode) mutex_unlock(&EXT3_I(inode)->truncate_mutex);
741 #define ext3_down_truncate_sem(inode) mutex_lock(&EXT3_I(inode)->truncate_mutex);
745 #define EXT_ASSERT(cond) BUG_ON(!(cond))
748 #ifdef EXT3_EXT_HAS_NO_TREE
749 /* for kernels 2.6.18 and later */
750 #define ext3_ext_base inode
751 #define ext3_ext_base2inode(inode) (inode)
752 #define EXT_DEPTH(inode) ext_depth(inode)
753 #define EXT_GENERATION(inode) ext_generation(inode)
754 #define fsfilt_ext3_ext_walk_space(inode, block, num, cb, cbdata) \
755 ext3_ext_walk_space(inode, block, num, cb, cbdata);
757 #define ext3_ext_base ext3_extents_tree
758 #define ext3_ext_base2inode(tree) (tree->inode)
759 #define fsfilt_ext3_ext_walk_space(tree, block, num, cb, cbdata) \
760 ext3_ext_walk_space(tree, block, num, cb);
763 #include <linux/lustre_version.h>
764 #if EXT3_EXT_MAGIC == 0xf301
765 #define ee_start e_start
766 #define ee_block e_block
769 #ifndef EXT3_BB_MAX_BLOCKS
770 #define ext3_mb_new_blocks(handle, inode, goal, count, aflags, err) \
771 ext3_new_blocks(handle, inode, count, goal, err)
775 unsigned long *blocks;
783 static int ext3_ext_find_goal(struct inode *inode, struct ext3_ext_path *path,
784 unsigned long block, int *aflags)
786 struct ext3_inode_info *ei = EXT3_I(inode);
787 unsigned long bg_start;
788 unsigned long colour;
792 struct ext3_extent *ex;
793 depth = path->p_depth;
795 /* try to predict block placement */
796 if ((ex = path[depth].p_ext)) {
798 /* This prefers to eat into a contiguous extent
799 * rather than find an extent that the whole
800 * request will fit into. This can fragment data
801 * block allocation and prevents our lovely 1M I/Os
802 * from reaching the disk intact. */
803 if (ex->ee_block + ex->ee_len == block)
806 return ex->ee_start + (block - ex->ee_block);
809 /* it looks index is empty
810 * try to find starting from index itself */
811 if (path[depth].p_bh)
812 return path[depth].p_bh->b_blocknr;
815 /* OK. use inode's group */
816 bg_start = (ei->i_block_group * EXT3_BLOCKS_PER_GROUP(inode->i_sb)) +
817 le32_to_cpu(EXT3_SB(inode->i_sb)->s_es->s_first_data_block);
818 colour = (current->pid % 16) *
819 (EXT3_BLOCKS_PER_GROUP(inode->i_sb) / 16);
820 return bg_start + colour + block;
823 #define ll_unmap_underlying_metadata(sb, blocknr) \
824 unmap_underlying_metadata((sb)->s_bdev, blocknr)
826 #ifndef EXT3_MB_HINT_GROUP_ALLOC
827 static unsigned long new_blocks(handle_t *handle, struct ext3_ext_base *base,
828 struct ext3_ext_path *path, unsigned long block,
829 unsigned long *count, int *err)
831 unsigned long pblock, goal;
833 struct inode *inode = ext3_ext_base2inode(base);
835 goal = ext3_ext_find_goal(inode, path, block, &aflags);
836 aflags |= 2; /* block have been already reserved */
837 pblock = ext3_mb_new_blocks(handle, inode, goal, count, aflags, err);
842 static unsigned long new_blocks(handle_t *handle, struct ext3_ext_base *base,
843 struct ext3_ext_path *path, unsigned long block,
844 unsigned long *count, int *err)
846 struct inode *inode = ext3_ext_base2inode(base);
847 struct ext3_allocation_request ar;
848 unsigned long pblock;
851 /* find neighbour allocated blocks */
853 *err = ext3_ext_search_left(base, path, &ar.lleft, &ar.pleft);
857 *err = ext3_ext_search_right(base, path, &ar.lright, &ar.pright);
861 /* allocate new block */
862 ar.goal = ext3_ext_find_goal(inode, path, block, &aflags);
866 ar.flags = EXT3_MB_HINT_DATA;
867 pblock = ext3_mb_new_blocks(handle, &ar, err);
874 #ifdef EXT3_EXT_HAS_NO_TREE
875 static int ext3_ext_new_extent_cb(struct ext3_ext_base *base,
876 struct ext3_ext_path *path,
877 struct ext3_ext_cache *cex,
880 struct bpointers *bp = cbdata;
882 static int ext3_ext_new_extent_cb(struct ext3_ext_base *base,
883 struct ext3_ext_path *path,
884 struct ext3_ext_cache *cex)
886 struct bpointers *bp = base->private;
888 struct inode *inode = ext3_ext_base2inode(base);
889 struct ext3_extent nex;
890 unsigned long pblock;
897 EXT_ASSERT(i == path->p_depth);
898 EXT_ASSERT(path[i].p_hdr);
900 if (cex->ec_type == EXT3_EXT_CACHE_EXTENT) {
905 if (bp->create == 0) {
907 if (cex->ec_block < bp->start)
908 i = bp->start - cex->ec_block;
909 if (i >= cex->ec_len)
910 CERROR("nothing to do?! i = %d, e_num = %u\n",
912 for (; i < cex->ec_len && bp->num; i++) {
924 tgen = EXT_GENERATION(base);
925 count = ext3_ext_calc_credits_for_insert(base, path);
926 ext3_up_truncate_sem(inode);
928 handle = fsfilt_ext3_journal_start(inode, count+EXT3_ALLOC_NEEDED+1);
929 if (IS_ERR(handle)) {
930 ext3_down_truncate_sem(inode);
931 return PTR_ERR(handle);
934 ext3_down_truncate_sem(inode);
935 if (tgen != EXT_GENERATION(base)) {
936 /* the tree has changed. so path can be invalid at moment */
937 fsfilt_ext3_journal_stop(handle);
942 pblock = new_blocks(handle, base, path, cex->ec_block, &count, &err);
945 EXT_ASSERT(count <= cex->ec_len);
947 /* insert new extent */
948 nex.ee_block = cex->ec_block;
949 nex.ee_start = pblock;
951 err = ext3_ext_insert_extent(handle, base, path, &nex);
953 CERROR("can't insert extent: %d\n", err);
954 /* XXX: export ext3_free_blocks() */
955 /*ext3_free_blocks(handle, inode, nex.ee_start, nex.ee_len, 0);*/
960 * Putting len of the actual extent we just inserted,
961 * we are asking ext3_ext_walk_space() to continue
962 * scaning after that block
964 cex->ec_len = nex.ee_len;
965 cex->ec_start = nex.ee_start;
966 BUG_ON(nex.ee_len == 0);
967 BUG_ON(nex.ee_block != cex->ec_block);
970 fsfilt_ext3_journal_stop(handle);
975 CERROR("hmm. why do we find this extent?\n");
976 CERROR("initial space: %lu:%u\n",
977 bp->start, bp->init_num);
978 CERROR("current extent: %u/%u/%u %d\n",
979 cex->ec_block, cex->ec_len,
980 cex->ec_start, cex->ec_type);
983 if (cex->ec_block < bp->start)
984 i = bp->start - cex->ec_block;
985 if (i >= cex->ec_len)
986 CERROR("nothing to do?! i = %d, e_num = %u\n",
988 for (; i < cex->ec_len && bp->num; i++) {
989 *(bp->blocks) = cex->ec_start + i;
990 if (cex->ec_type == EXT3_EXT_CACHE_EXTENT) {
994 /* unmap any possible underlying metadata from
995 * the block device mapping. bug 6998. */
996 ll_unmap_underlying_metadata(inode->i_sb,
1008 int fsfilt_map_nblocks(struct inode *inode, unsigned long block,
1009 unsigned long num, unsigned long *blocks,
1010 int *created, int create)
1012 #ifdef EXT3_EXT_HAS_NO_TREE
1013 struct ext3_ext_base *base = inode;
1015 struct ext3_extents_tree tree;
1016 struct ext3_ext_base *base = &tree;
1018 struct bpointers bp;
1021 CDEBUG(D_OTHER, "blocks %lu-%lu requested for inode %u\n",
1022 block, block + num - 1, (unsigned) inode->i_ino);
1024 #ifndef EXT3_EXT_HAS_NO_TREE
1025 ext3_init_tree_desc(base, inode);
1029 bp.created = created;
1031 bp.init_num = bp.num = num;
1034 ext3_down_truncate_sem(inode);
1035 err = fsfilt_ext3_ext_walk_space(base, block, num,
1036 ext3_ext_new_extent_cb, &bp);
1037 ext3_ext_invalidate_cache(base);
1038 ext3_up_truncate_sem(inode);
1043 int fsfilt_ext3_map_ext_inode_pages(struct inode *inode, struct page **page,
1044 int pages, unsigned long *blocks,
1045 int *created, int create)
1047 int blocks_per_page = CFS_PAGE_SIZE >> inode->i_blkbits;
1049 struct page *fp = NULL;
1052 CDEBUG(D_OTHER, "inode %lu: map %d pages from %lu\n",
1053 inode->i_ino, pages, (*page)->index);
1055 /* pages are sorted already. so, we just have to find
1056 * contig. space and process them properly */
1059 /* start new extent */
1064 } else if (fp->index + clen == (*page)->index) {
1065 /* continue the extent */
1072 /* process found extent */
1073 rc = fsfilt_map_nblocks(inode, fp->index * blocks_per_page,
1074 clen * blocks_per_page, blocks,
1079 /* look for next extent */
1081 blocks += blocks_per_page * clen;
1082 created += blocks_per_page * clen;
1086 rc = fsfilt_map_nblocks(inode, fp->index * blocks_per_page,
1087 clen * blocks_per_page, blocks,
1092 #endif /* EXT3_MULTIBLOCK_ALLOCATOR */
1094 extern int ext3_map_inode_page(struct inode *inode, struct page *page,
1095 unsigned long *blocks, int *created, int create);
1096 int fsfilt_ext3_map_bm_inode_pages(struct inode *inode, struct page **page,
1097 int pages, unsigned long *blocks,
1098 int *created, int create)
1100 int blocks_per_page = CFS_PAGE_SIZE >> inode->i_blkbits;
1104 for (i = 0, cr = created, b = blocks; i < pages; i++, page++) {
1105 rc = ext3_map_inode_page(inode, *page, b, cr, create);
1107 CERROR("ino %lu, blk %lu cr %u create %d: rc %d\n",
1108 inode->i_ino, *b, *cr, create, rc);
1112 b += blocks_per_page;
1113 cr += blocks_per_page;
1118 int fsfilt_ext3_map_inode_pages(struct inode *inode, struct page **page,
1119 int pages, unsigned long *blocks,
1120 int *created, int create,
1121 struct semaphore *optional_sem)
1124 #ifdef EXT3_MULTIBLOCK_ALLOCATOR
1125 if (EXT3_I(inode)->i_flags & EXT3_EXTENTS_FL) {
1126 rc = fsfilt_ext3_map_ext_inode_pages(inode, page, pages,
1127 blocks, created, create);
1131 if (optional_sem != NULL)
1133 rc = fsfilt_ext3_map_bm_inode_pages(inode, page, pages, blocks,
1135 if (optional_sem != NULL)
1141 int fsfilt_ext3_read(struct inode *inode, void *buf, int size, loff_t *offs)
1143 unsigned long block;
1144 struct buffer_head *bh;
1145 int err, blocksize, csize, boffs, osize = size;
1147 /* prevent reading after eof */
1149 if (i_size_read(inode) < *offs + size) {
1150 size = i_size_read(inode) - *offs;
1153 CERROR("size %llu is too short for read %u@%llu\n",
1154 i_size_read(inode), size, *offs);
1156 } else if (size == 0) {
1163 blocksize = 1 << inode->i_blkbits;
1166 block = *offs >> inode->i_blkbits;
1167 boffs = *offs & (blocksize - 1);
1168 csize = min(blocksize - boffs, size);
1169 bh = ext3_bread(NULL, inode, block, 0, &err);
1171 CERROR("can't read block: %d\n", err);
1175 memcpy(buf, bh->b_data + boffs, csize);
1184 EXPORT_SYMBOL(fsfilt_ext3_read);
1186 static int fsfilt_ext3_read_record(struct file * file, void *buf,
1187 int size, loff_t *offs)
1190 rc = fsfilt_ext3_read(file->f_dentry->d_inode, buf, size, offs);
1196 int fsfilt_ext3_write_handle(struct inode *inode, void *buf, int bufsize,
1197 loff_t *offs, handle_t *handle)
1199 struct buffer_head *bh = NULL;
1200 loff_t old_size = i_size_read(inode), offset = *offs;
1201 loff_t new_size = i_size_read(inode);
1202 unsigned long block;
1203 int err = 0, blocksize = 1 << inode->i_blkbits, size, boffs;
1205 while (bufsize > 0) {
1209 block = offset >> inode->i_blkbits;
1210 boffs = offset & (blocksize - 1);
1211 size = min(blocksize - boffs, bufsize);
1212 bh = ext3_bread(handle, inode, block, 1, &err);
1214 CERROR("can't read/create block: %d\n", err);
1218 err = ext3_journal_get_write_access(handle, bh);
1220 CERROR("journal_get_write_access() returned error %d\n",
1224 LASSERT(bh->b_data + boffs + size <= bh->b_data + bh->b_size);
1225 memcpy(bh->b_data + boffs, buf, size);
1226 err = ext3_journal_dirty_metadata(handle, bh);
1228 CERROR("journal_dirty_metadata() returned error %d\n",
1232 if (offset + size > new_size)
1233 new_size = offset + size;
1241 /* correct in-core and on-disk sizes */
1242 if (new_size > i_size_read(inode)) {
1244 if (new_size > i_size_read(inode))
1245 i_size_write(inode, new_size);
1246 if (i_size_read(inode) > EXT3_I(inode)->i_disksize)
1247 EXT3_I(inode)->i_disksize = i_size_read(inode);
1248 if (i_size_read(inode) > old_size)
1249 mark_inode_dirty(inode);
1257 EXPORT_SYMBOL(fsfilt_ext3_write_handle);
1259 static int fsfilt_ext3_write_record(struct file *file, void *buf, int bufsize,
1260 loff_t *offs, int force_sync)
1262 struct inode *inode = file->f_dentry->d_inode;
1264 int err, block_count = 0, blocksize;
1266 /* Determine how many transaction credits are needed */
1267 blocksize = 1 << inode->i_blkbits;
1268 block_count = (*offs & (blocksize - 1)) + bufsize;
1269 block_count = (block_count + blocksize - 1) >> inode->i_blkbits;
1271 handle = fsfilt_ext3_journal_start(inode,
1272 block_count * FSFILT_DATA_TRANS_BLOCKS(inode->i_sb) + 2);
1273 if (IS_ERR(handle)) {
1274 CERROR("can't start transaction for %d blocks (%d bytes)\n",
1275 block_count * FSFILT_DATA_TRANS_BLOCKS(inode->i_sb) + 2, bufsize);
1276 return PTR_ERR(handle);
1279 err = fsfilt_ext3_write_handle(inode, buf, bufsize, offs, handle);
1281 if (!err && force_sync)
1282 handle->h_sync = 1; /* recovery likes this */
1284 fsfilt_ext3_journal_stop(handle);
1289 static int fsfilt_ext3_setup(struct super_block *sb)
1292 EXT3_SB(sb)->dx_lock = fsfilt_ext3_dx_lock;
1293 EXT3_SB(sb)->dx_unlock = fsfilt_ext3_dx_unlock;
1296 CWARN("Enabling PDIROPS\n");
1297 set_opt(EXT3_SB(sb)->s_mount_opt, PDIROPS);
1298 sb->s_flags |= S_PDIROPS;
1300 if (!EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_DIR_INDEX))
1301 CWARN("filesystem doesn't have dir_index feature enabled\n");
1302 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,13)) && HAVE_QUOTA_SUPPORT
1303 set_opt(EXT3_SB(sb)->s_mount_opt, QUOTA);
1308 /* If fso is NULL, op is FSFILT operation, otherwise op is number of fso
1309 objects. Logs is number of logfiles to update */
1310 static int fsfilt_ext3_get_op_len(int op, struct fsfilt_objinfo *fso, int logs)
1314 case FSFILT_OP_CREATE:
1315 /* directory leaf, index & indirect & EA*/
1316 return 4 + 3 * logs;
1317 case FSFILT_OP_UNLINK:
1323 struct super_block *sb = fso->fso_dentry->d_inode->i_sb;
1324 int blockpp = 1 << (CFS_PAGE_SHIFT - sb->s_blocksize_bits);
1325 int addrpp = EXT3_ADDR_PER_BLOCK(sb) * blockpp;
1326 for (i = 0; i < op; i++, fso++) {
1327 int nblocks = fso->fso_bufcnt * blockpp;
1328 int ndindirect = min(nblocks, addrpp + 1);
1329 int nindir = nblocks + ndindirect + 1;
1333 return needed + 3 * logs;
1339 static const char *op_quotafile[] = { "lquota.user", "lquota.group" };
1341 #define DQINFO_COPY(out, in) \
1343 Q_COPY(out, in, dqi_bgrace); \
1344 Q_COPY(out, in, dqi_igrace); \
1345 Q_COPY(out, in, dqi_flags); \
1346 Q_COPY(out, in, dqi_valid); \
1349 #define DQBLK_COPY(out, in) \
1351 Q_COPY(out, in, dqb_bhardlimit); \
1352 Q_COPY(out, in, dqb_bsoftlimit); \
1353 Q_COPY(out, in, dqb_curspace); \
1354 Q_COPY(out, in, dqb_ihardlimit); \
1355 Q_COPY(out, in, dqb_isoftlimit); \
1356 Q_COPY(out, in, dqb_curinodes); \
1357 Q_COPY(out, in, dqb_btime); \
1358 Q_COPY(out, in, dqb_itime); \
1359 Q_COPY(out, in, dqb_valid); \
1364 static int fsfilt_ext3_quotactl(struct super_block *sb,
1365 struct obd_quotactl *oqc)
1367 int i, rc = 0, error = 0;
1368 struct quotactl_ops *qcop;
1369 struct if_dqinfo *info;
1370 struct if_dqblk *dqblk;
1376 OBD_ALLOC_PTR(info);
1379 OBD_ALLOC_PTR(dqblk);
1385 DQINFO_COPY(info, &oqc->qc_dqinfo);
1386 DQBLK_COPY(dqblk, &oqc->qc_dqblk);
1389 if (oqc->qc_cmd == Q_QUOTAON || oqc->qc_cmd == Q_QUOTAOFF) {
1390 for (i = 0; i < MAXQUOTAS; i++) {
1391 if (!Q_TYPESET(oqc, i))
1394 if (oqc->qc_cmd == Q_QUOTAON) {
1395 if (!qcop->quota_on)
1396 GOTO(out, rc = -ENOSYS);
1397 rc = qcop->quota_on(sb, i, oqc->qc_id,
1398 (char *)op_quotafile[i]);
1399 } else if (oqc->qc_cmd == Q_QUOTAOFF) {
1400 if (!qcop->quota_off)
1401 GOTO(out, rc = -ENOSYS);
1402 rc = qcop->quota_off(sb, i);
1410 GOTO(out, rc ?: error);
1413 switch (oqc->qc_cmd) {
1416 if (!qcop->get_info)
1417 GOTO(out, rc = -ENOSYS);
1418 rc = qcop->get_info(sb, oqc->qc_type, info);
1422 if (!qcop->set_dqblk)
1423 GOTO(out, rc = -ENOSYS);
1424 rc = qcop->set_dqblk(sb, oqc->qc_type, oqc->qc_id, dqblk);
1428 if (!qcop->get_dqblk)
1429 GOTO(out, rc = -ENOSYS);
1430 rc = qcop->get_dqblk(sb, oqc->qc_type, oqc->qc_id, dqblk);
1433 if (!sb->s_qcop->quota_sync)
1434 GOTO(out, rc = -ENOSYS);
1435 qcop->quota_sync(sb, oqc->qc_type);
1438 CERROR("unsupported quotactl command: %d", oqc->qc_cmd);
1442 DQINFO_COPY(&oqc->qc_dqinfo, info);
1443 DQBLK_COPY(&oqc->qc_dqblk, dqblk);
1446 OBD_FREE_PTR(dqblk);
1449 CDEBUG(D_QUOTA, "quotactl command %#x, id %u, type %d "
1451 oqc->qc_cmd, oqc->qc_id, oqc->qc_type, rc);
1456 struct hlist_node dqb_hash; /* quotacheck hash */
1457 struct list_head dqb_list; /* in list also */
1458 qid_t dqb_id; /* uid/gid */
1459 short dqb_type; /* USRQUOTA/GRPQUOTA */
1460 __u32 dqb_bhardlimit; /* block hard limit */
1461 __u32 dqb_bsoftlimit; /* block soft limit */
1462 qsize_t dqb_curspace; /* current space */
1463 __u32 dqb_ihardlimit; /* inode hard limit */
1464 __u32 dqb_isoftlimit; /* inode soft limit */
1465 __u32 dqb_curinodes; /* current inodes */
1466 __u64 dqb_btime; /* block grace time */
1467 __u64 dqb_itime; /* inode grace time */
1468 __u32 dqb_valid; /* flag for above fields */
1471 static inline unsigned int chkquot_hash(qid_t id, int type)
1472 __attribute__((__const__));
1474 static inline unsigned int chkquot_hash(qid_t id, int type)
1476 return (id * (MAXQUOTAS - type)) % NR_DQHASH;
1479 static inline struct chk_dqblk *
1480 find_chkquot(struct hlist_head *head, qid_t id, int type)
1482 struct hlist_node *node;
1483 struct chk_dqblk *cdqb;
1485 hlist_for_each(node, head) {
1486 cdqb = hlist_entry(node, struct chk_dqblk, dqb_hash);
1487 if (cdqb->dqb_id == id && cdqb->dqb_type == type)
1494 static struct chk_dqblk *alloc_chkquot(qid_t id, int type)
1496 struct chk_dqblk *cdqb;
1498 OBD_ALLOC_PTR(cdqb);
1500 INIT_HLIST_NODE(&cdqb->dqb_hash);
1501 INIT_LIST_HEAD(&cdqb->dqb_list);
1503 cdqb->dqb_type = type;
1509 static struct chk_dqblk *
1510 cqget(struct super_block *sb, struct hlist_head *hash, struct list_head *list,
1511 qid_t id, int type, int first_check)
1513 struct hlist_head *head = hash + chkquot_hash(id, type);
1514 struct if_dqblk dqb;
1515 struct chk_dqblk *cdqb;
1518 cdqb = find_chkquot(head, id, type);
1522 cdqb = alloc_chkquot(id, type);
1527 rc = sb->s_qcop->get_dqblk(sb, type, id, &dqb);
1529 CERROR("get_dqblk of id %u, type %d failed: %d\n",
1532 DQBLK_COPY(cdqb, &dqb);
1533 cdqb->dqb_curspace = 0;
1534 cdqb->dqb_curinodes = 0;
1538 hlist_add_head(&cdqb->dqb_hash, head);
1539 list_add_tail(&cdqb->dqb_list, list);
1544 static inline int quota_onoff(struct super_block *sb, int cmd, int type)
1546 struct obd_quotactl *oqctl;
1549 OBD_ALLOC_PTR(oqctl);
1553 oqctl->qc_cmd = cmd;
1554 oqctl->qc_id = QFMT_LDISKFS;
1555 oqctl->qc_type = type;
1556 rc = fsfilt_ext3_quotactl(sb, oqctl);
1558 OBD_FREE_PTR(oqctl);
1562 static inline int read_old_dqinfo(struct super_block *sb, int type,
1563 struct if_dqinfo *dqinfo)
1565 struct obd_quotactl *oqctl;
1569 OBD_ALLOC_PTR(oqctl);
1573 oqctl->qc_cmd = Q_GETINFO;
1574 oqctl->qc_type = type;
1575 rc = fsfilt_ext3_quotactl(sb, oqctl);
1577 ((struct obd_dqinfo *)dqinfo)[type] = oqctl->qc_dqinfo;
1579 OBD_FREE_PTR(oqctl);
1583 static inline struct ext3_group_desc *
1584 get_group_desc(struct super_block *sb, int group)
1586 unsigned long desc_block, desc;
1587 struct ext3_group_desc *gdp;
1589 desc_block = group / EXT3_DESC_PER_BLOCK(sb);
1590 desc = group % EXT3_DESC_PER_BLOCK(sb);
1591 gdp = (struct ext3_group_desc *)
1592 EXT3_SB(sb)->s_group_desc[desc_block]->b_data;
1597 static inline struct buffer_head *
1598 read_inode_bitmap(struct super_block *sb, unsigned long group)
1600 struct ext3_group_desc *desc;
1601 struct buffer_head *bh;
1603 desc = get_group_desc(sb, group);
1604 bh = sb_bread(sb, le32_to_cpu(desc->bg_inode_bitmap));
1609 static inline struct inode *ext3_iget_inuse(struct super_block *sb,
1610 struct buffer_head *bitmap_bh,
1611 int index, unsigned long ino)
1613 struct inode *inode = NULL;
1615 if (ext3_test_bit(index, bitmap_bh->b_data))
1616 inode = iget(sb, ino);
1622 struct hlist_head qckt_hash[NR_DQHASH]; /* quotacheck hash */
1623 struct list_head qckt_list; /* quotacheck list */
1624 int qckt_first_check[MAXQUOTAS]; /* 1 if no old quotafile */
1625 struct if_dqinfo qckt_dqinfo[MAXQUOTAS]; /* old dqinfo */
1628 static int add_inode_quota(struct inode *inode, struct qchk_ctxt *qctxt,
1629 struct obd_quotactl *oqc)
1631 struct chk_dqblk *cdqb[MAXQUOTAS] = { NULL, };
1633 qid_t qid[MAXQUOTAS];
1639 qid[USRQUOTA] = inode->i_uid;
1640 qid[GRPQUOTA] = inode->i_gid;
1642 if (S_ISDIR(inode->i_mode) ||
1643 S_ISREG(inode->i_mode) ||
1644 S_ISLNK(inode->i_mode))
1645 size = inode_get_bytes(inode);
1647 for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
1648 if (!Q_TYPESET(oqc, cnt))
1651 cdqb[cnt] = cqget(inode->i_sb, qctxt->qckt_hash,
1652 &qctxt->qckt_list, qid[cnt], cnt,
1653 qctxt->qckt_first_check[cnt]);
1659 cdqb[cnt]->dqb_curspace += size;
1660 cdqb[cnt]->dqb_curinodes++;
1664 for (i = 0; i < cnt; i++) {
1665 if (!Q_TYPESET(oqc, i))
1668 cdqb[i]->dqb_curspace -= size;
1669 cdqb[i]->dqb_curinodes--;
1676 static int v2_write_dqheader(struct file *f, int type)
1678 static const __u32 quota_magics[] = V2_INITQMAGICS;
1679 static const __u32 quota_versions[] = V2_INITQVERSIONS;
1680 struct v2_disk_dqheader dqhead;
1683 CLASSERT(ARRAY_SIZE(quota_magics) == ARRAY_SIZE(quota_versions));
1684 LASSERT(0 <= type && type < ARRAY_SIZE(quota_magics));
1686 dqhead.dqh_magic = cpu_to_le32(quota_magics[type]);
1687 dqhead.dqh_version = cpu_to_le32(quota_versions[type]);
1689 return cfs_user_write(f, (char *)&dqhead, sizeof(dqhead), &offset);
1692 /* write dqinfo struct in a new quota file */
1693 static int v2_write_dqinfo(struct file *f, int type, struct if_dqinfo *info)
1695 struct v2_disk_dqinfo dqinfo;
1696 __u32 blocks = V2_DQTREEOFF + 1;
1697 loff_t offset = V2_DQINFOOFF;
1700 dqinfo.dqi_bgrace = cpu_to_le32(info->dqi_bgrace);
1701 dqinfo.dqi_igrace = cpu_to_le32(info->dqi_igrace);
1702 dqinfo.dqi_flags = cpu_to_le32(info->dqi_flags & DQF_MASK &
1705 dqinfo.dqi_bgrace = cpu_to_le32(MAX_DQ_TIME);
1706 dqinfo.dqi_igrace = cpu_to_le32(MAX_IQ_TIME);
1707 dqinfo.dqi_flags = 0;
1710 dqinfo.dqi_blocks = cpu_to_le32(blocks);
1711 dqinfo.dqi_free_blk = 0;
1712 dqinfo.dqi_free_entry = 0;
1714 return cfs_user_write(f, (char *)&dqinfo, sizeof(dqinfo), &offset);
1717 static int create_new_quota_files(struct qchk_ctxt *qctxt,
1718 struct obd_quotactl *oqc)
1723 for (i = 0; i < MAXQUOTAS; i++) {
1724 struct if_dqinfo *info = qctxt->qckt_first_check[i]?
1725 NULL : &qctxt->qckt_dqinfo[i];
1728 if (!Q_TYPESET(oqc, i))
1731 file = filp_open(op_quotafile[i], O_RDWR | O_CREAT | O_TRUNC,
1735 CERROR("can't create %s file: rc = %d\n",
1736 op_quotafile[i], rc);
1740 if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
1741 CERROR("file %s is not regular", op_quotafile[i]);
1742 filp_close(file, 0);
1743 GOTO(out, rc = -EINVAL);
1746 rc = v2_write_dqheader(file, i);
1748 filp_close(file, 0);
1752 rc = v2_write_dqinfo(file, i, info);
1753 filp_close(file, 0);
1763 static int commit_chkquot(struct super_block *sb, struct qchk_ctxt *qctxt,
1764 struct chk_dqblk *cdqb)
1766 struct obd_quotactl *oqc;
1775 now = CURRENT_SECONDS;
1777 if (cdqb->dqb_bsoftlimit &&
1778 toqb(cdqb->dqb_curspace) >= cdqb->dqb_bsoftlimit &&
1781 now + qctxt->qckt_dqinfo[cdqb->dqb_type].dqi_bgrace;
1783 if (cdqb->dqb_isoftlimit &&
1784 cdqb->dqb_curinodes >= cdqb->dqb_isoftlimit &&
1787 now + qctxt->qckt_dqinfo[cdqb->dqb_type].dqi_igrace;
1789 cdqb->dqb_valid = QIF_ALL;
1791 oqc->qc_cmd = Q_SETQUOTA;
1792 oqc->qc_type = cdqb->dqb_type;
1793 oqc->qc_id = cdqb->dqb_id;
1794 DQBLK_COPY(&oqc->qc_dqblk, cdqb);
1796 rc = fsfilt_ext3_quotactl(sb, oqc);
1801 static int prune_chkquots(struct super_block *sb,
1802 struct qchk_ctxt *qctxt, int error)
1804 struct chk_dqblk *cdqb, *tmp;
1807 list_for_each_entry_safe(cdqb, tmp, &qctxt->qckt_list, dqb_list) {
1809 rc = commit_chkquot(sb, qctxt, cdqb);
1813 hlist_del_init(&cdqb->dqb_hash);
1814 list_del(&cdqb->dqb_list);
1821 static int fsfilt_ext3_quotacheck(struct super_block *sb,
1822 struct obd_quotactl *oqc)
1824 struct ext3_sb_info *sbi = EXT3_SB(sb);
1826 struct qchk_ctxt *qctxt;
1827 struct buffer_head *bitmap_bh = NULL;
1829 struct inode *inode;
1833 /* turn on quota and read dqinfo if existed */
1834 OBD_ALLOC_PTR(qctxt);
1836 oqc->qc_stat = -ENOMEM;
1840 for (i = 0; i < NR_DQHASH; i++)
1841 INIT_HLIST_HEAD(&qctxt->qckt_hash[i]);
1842 INIT_LIST_HEAD(&qctxt->qckt_list);
1844 for (i = 0; i < MAXQUOTAS; i++) {
1845 if (!Q_TYPESET(oqc, i))
1848 rc = quota_onoff(sb, Q_QUOTAON, i);
1849 if (!rc || rc == -EBUSY) {
1850 rc = read_old_dqinfo(sb, i, qctxt->qckt_dqinfo);
1853 } else if (rc == -ENOENT) {
1854 qctxt->qckt_first_check[i] = 1;
1860 /* check quota and update in hash */
1861 for (group = 0; group < sbi->s_groups_count; group++) {
1862 ino = group * sbi->s_inodes_per_group + 1;
1863 bitmap_bh = read_inode_bitmap(sb, group);
1865 CERROR("read_inode_bitmap group %d failed", group);
1866 GOTO(out, rc = -EIO);
1869 for (i = 0; i < sbi->s_inodes_per_group; i++, ino++) {
1870 if (ino < sbi->s_first_ino)
1873 inode = ext3_iget_inuse(sb, bitmap_bh, i, ino);
1874 rc = add_inode_quota(inode, qctxt, oqc);
1885 /* read old quota limits from old quota file. (only for the user
1886 * has limits but hasn't file) */
1887 #ifdef HAVE_QUOTA_SUPPORT
1888 for (i = 0; i < MAXQUOTAS; i++) {
1889 struct list_head id_list;
1890 struct dquot_id *dqid, *tmp;
1892 if (!Q_TYPESET(oqc, i))
1895 if (qctxt->qckt_first_check[i])
1899 LASSERT(sb_dqopt(sb)->files[i] != NULL);
1900 INIT_LIST_HEAD(&id_list);
1901 #ifndef KERNEL_SUPPORTS_QUOTA_READ
1902 rc = lustre_get_qids(sb_dqopt(sb)->files[i], NULL, i, &id_list);
1904 rc = lustre_get_qids(NULL, sb_dqopt(sb)->files[i], i, &id_list);
1907 CERROR("read old limits failed. (rc:%d)\n", rc);
1909 list_for_each_entry_safe(dqid, tmp, &id_list, di_link) {
1910 list_del_init(&dqid->di_link);
1913 cqget(sb, qctxt->qckt_hash, &qctxt->qckt_list,
1915 qctxt->qckt_first_check[i]);
1920 /* turn off quota cause we are to dump chk_dqblk to files */
1921 quota_onoff(sb, Q_QUOTAOFF, oqc->qc_type);
1923 rc = create_new_quota_files(qctxt, oqc);
1927 /* we use vfs functions to set dqblk, so turn quota on */
1928 rc = quota_onoff(sb, Q_QUOTAON, oqc->qc_type);
1930 /* dump and free chk_dqblk */
1931 rc = prune_chkquots(sb, qctxt, rc);
1932 OBD_FREE_PTR(qctxt);
1934 /* turn off quota, `lfs quotacheck` will turn on when all
1935 * nodes quotacheck finish. */
1936 quota_onoff(sb, Q_QUOTAOFF, oqc->qc_type);
1940 CERROR("quotacheck failed: rc = %d\n", rc);
1945 #ifdef HAVE_QUOTA_SUPPORT
1946 static int fsfilt_ext3_quotainfo(struct lustre_quota_info *lqi, int type,
1952 if (lqi->qi_files[type] == NULL) {
1953 CERROR("operate qinfo before it's enabled!\n");
1959 rc = lustre_check_quota_file(lqi, type);
1962 rc = lustre_read_quota_info(lqi, type);
1965 rc = lustre_write_quota_info(lqi, type);
1967 case QFILE_INIT_INFO:
1968 rc = lustre_init_quota_info(lqi, type);
1971 CERROR("Unsupported admin quota file cmd %d\n", cmd);
1978 static int fsfilt_ext3_qids(struct file *file, struct inode *inode, int type,
1979 struct list_head *list)
1981 return lustre_get_qids(file, inode, type, list);
1984 static int fsfilt_ext3_dquot(struct lustre_dquot *dquot, int cmd)
1989 if (dquot->dq_info->qi_files[dquot->dq_type] == NULL) {
1990 CERROR("operate dquot before it's enabled!\n");
1995 case QFILE_RD_DQUOT:
1996 rc = lustre_read_dquot(dquot);
1998 case QFILE_WR_DQUOT:
1999 if (dquot->dq_dqb.dqb_ihardlimit ||
2000 dquot->dq_dqb.dqb_isoftlimit ||
2001 dquot->dq_dqb.dqb_bhardlimit ||
2002 dquot->dq_dqb.dqb_bsoftlimit)
2003 clear_bit(DQ_FAKE_B, &dquot->dq_flags);
2005 set_bit(DQ_FAKE_B, &dquot->dq_flags);
2007 rc = lustre_commit_dquot(dquot);
2012 CERROR("Unsupported admin quota file cmd %d\n", cmd);
2020 lvfs_sbdev_type fsfilt_ext3_journal_sbdev(struct super_block *sb)
2022 return (EXT3_SB(sb)->journal_bdev);
2024 EXPORT_SYMBOL(fsfilt_ext3_journal_sbdev);
2026 static struct fsfilt_operations fsfilt_ext3_ops = {
2028 .fs_owner = THIS_MODULE,
2029 .fs_getlabel = fsfilt_ext3_get_label,
2030 .fs_setlabel = fsfilt_ext3_set_label,
2031 .fs_uuid = fsfilt_ext3_uuid,
2032 .fs_start = fsfilt_ext3_start,
2033 .fs_brw_start = fsfilt_ext3_brw_start,
2034 .fs_extend = fsfilt_ext3_extend,
2035 .fs_commit = fsfilt_ext3_commit,
2036 .fs_commit_async = fsfilt_ext3_commit_async,
2037 .fs_commit_wait = fsfilt_ext3_commit_wait,
2038 .fs_setattr = fsfilt_ext3_setattr,
2039 .fs_iocontrol = fsfilt_ext3_iocontrol,
2040 .fs_set_md = fsfilt_ext3_set_md,
2041 .fs_get_md = fsfilt_ext3_get_md,
2042 .fs_readpage = fsfilt_ext3_readpage,
2043 .fs_add_journal_cb = fsfilt_ext3_add_journal_cb,
2044 .fs_statfs = fsfilt_ext3_statfs,
2045 .fs_sync = fsfilt_ext3_sync,
2046 .fs_map_inode_pages = fsfilt_ext3_map_inode_pages,
2047 .fs_write_record = fsfilt_ext3_write_record,
2048 .fs_read_record = fsfilt_ext3_read_record,
2049 .fs_setup = fsfilt_ext3_setup,
2050 .fs_send_bio = fsfilt_ext3_send_bio,
2051 .fs_get_op_len = fsfilt_ext3_get_op_len,
2052 .fs_quotactl = fsfilt_ext3_quotactl,
2053 .fs_quotacheck = fsfilt_ext3_quotacheck,
2054 #ifdef HAVE_DISK_INODE_VERSION
2055 .fs_get_version = fsfilt_ext3_get_version,
2056 .fs_set_version = fsfilt_ext3_set_version,
2058 #ifdef HAVE_QUOTA_SUPPORT
2059 .fs_quotainfo = fsfilt_ext3_quotainfo,
2060 .fs_qids = fsfilt_ext3_qids,
2061 .fs_dquot = fsfilt_ext3_dquot,
2063 .fs_journal_sbdev = fsfilt_ext3_journal_sbdev,
2066 static int __init fsfilt_ext3_init(void)
2070 fcb_cache = cfs_mem_cache_create("fsfilt_ext3_fcb",
2071 sizeof(struct fsfilt_cb_data), 0, 0);
2073 CERROR("error allocating fsfilt journal callback cache\n");
2074 GOTO(out, rc = -ENOMEM);
2077 rc = fsfilt_register_ops(&fsfilt_ext3_ops);
2080 int err = cfs_mem_cache_destroy(fcb_cache);
2081 LASSERTF(err == 0, "error destroying new cache: rc %d\n", err);
2087 static void __exit fsfilt_ext3_exit(void)
2091 fsfilt_unregister_ops(&fsfilt_ext3_ops);
2092 rc = cfs_mem_cache_destroy(fcb_cache);
2093 LASSERTF(rc == 0, "couldn't destroy fcb_cache slab\n");
2096 module_init(fsfilt_ext3_init);
2097 module_exit(fsfilt_ext3_exit);
2099 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
2100 MODULE_DESCRIPTION("Lustre ext3 Filesystem Helper v0.1");
2101 MODULE_LICENSE("GPL");