1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/lvfs/fsfilt_ext3.c
38 * Author: Andreas Dilger <adilger@clusterfs.com>
41 #define DEBUG_SUBSYSTEM S_FILTER
43 #include <linux/init.h>
44 #include <linux/module.h>
46 #include <linux/jbd.h>
47 #include <linux/slab.h>
48 #include <linux/pagemap.h>
49 #include <linux/quotaops.h>
50 #include <linux/ext3_fs.h>
51 #include <linux/ext3_jbd.h>
52 #include <linux/version.h>
53 #include <linux/bitops.h>
54 #include <linux/quota.h>
55 #include <linux/quotaio_v1.h>
56 #include <linux/quotaio_v2.h>
57 #include <ext3/xattr.h>
59 #include <libcfs/libcfs.h>
60 #include <lustre_fsfilt.h>
62 #include <lustre_quota.h>
63 #include <linux/lustre_compat25.h>
64 #include <linux/lprocfs_status.h>
66 #ifdef EXT3_MULTIBLOCK_ALLOCATOR
67 #include <linux/ext3_extents.h>
70 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15)
71 #define FSFILT_DATA_TRANS_BLOCKS(sb) EXT3_DATA_TRANS_BLOCKS
72 #define FSFILT_DELETE_TRANS_BLOCKS(sb) EXT3_DELETE_TRANS_BLOCKS
74 #define FSFILT_DATA_TRANS_BLOCKS(sb) EXT3_DATA_TRANS_BLOCKS(sb)
75 #define FSFILT_DELETE_TRANS_BLOCKS(sb) EXT3_DELETE_TRANS_BLOCKS(sb)
78 #ifdef EXT3_SINGLEDATA_TRANS_BLOCKS_HAS_SB
79 /* for kernels 2.6.18 and later */
80 #define FSFILT_SINGLEDATA_TRANS_BLOCKS(sb) EXT3_SINGLEDATA_TRANS_BLOCKS(sb)
82 #define FSFILT_SINGLEDATA_TRANS_BLOCKS(sb) EXT3_SINGLEDATA_TRANS_BLOCKS
85 #define fsfilt_ext3_journal_start(inode, nblocks) ext3_journal_start(inode, nblocks)
86 #define fsfilt_ext3_journal_stop(handle) ext3_journal_stop(handle)
88 static cfs_mem_cache_t *fcb_cache;
90 struct fsfilt_cb_data {
91 struct journal_callback cb_jcb; /* jbd private data - MUST BE FIRST */
92 fsfilt_cb_t cb_func; /* MDS/OBD completion function */
93 struct obd_device *cb_obd; /* MDS/OBD completion device */
94 __u64 cb_last_rcvd; /* MDS/OST last committed operation */
95 void *cb_data; /* MDS/OST completion function data */
98 #ifndef EXT3_XATTR_INDEX_TRUSTED /* temporary until we hit l28 kernel */
99 #define EXT3_XATTR_INDEX_TRUSTED 4
102 static char *fsfilt_ext3_get_label(struct super_block *sb)
104 return EXT3_SB(sb)->s_es->s_volume_name;
107 static int fsfilt_ext3_set_label(struct super_block *sb, char *label)
109 /* see e.g. fsfilt_ext3_write_record() */
114 journal = EXT3_SB(sb)->s_journal;
115 handle = journal_start(journal, 1);
116 if (IS_ERR(handle)) {
117 CERROR("can't start transaction\n");
118 return(PTR_ERR(handle));
121 err = ext3_journal_get_write_access(handle, EXT3_SB(sb)->s_sbh);
125 memcpy(EXT3_SB(sb)->s_es->s_volume_name, label,
126 sizeof(EXT3_SB(sb)->s_es->s_volume_name));
128 err = ext3_journal_dirty_metadata(handle, EXT3_SB(sb)->s_sbh);
131 journal_stop(handle);
136 static char *fsfilt_ext3_uuid(struct super_block *sb)
138 return EXT3_SB(sb)->s_es->s_uuid;
141 #ifdef HAVE_DISK_INODE_VERSION
143 * Get the 64-bit version for an inode.
145 static __u64 fsfilt_ext3_get_version(struct inode *inode)
147 return EXT3_I(inode)->i_fs_version;
151 * Set the 64-bit version and return the old version.
153 static __u64 fsfilt_ext3_set_version(struct inode *inode, __u64 new_version)
155 __u64 old_version = EXT3_I(inode)->i_fs_version;
157 (EXT3_I(inode))->i_fs_version = new_version;
164 * We don't currently need any additional blocks for rmdir and
165 * unlink transactions because we are storing the OST oa_id inside
166 * the inode (which we will be changing anyways as part of this
169 static void *fsfilt_ext3_start(struct inode *inode, int op, void *desc_private,
172 /* For updates to the last received file */
173 int nblocks = FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb);
177 if (current->journal_info) {
178 CDEBUG(D_INODE, "increasing refcount on %p\n",
179 current->journal_info);
184 case FSFILT_OP_RMDIR:
185 case FSFILT_OP_UNLINK:
186 /* delete one file + create/update logs for each stripe */
187 nblocks += FSFILT_DELETE_TRANS_BLOCKS(inode->i_sb);
188 nblocks += (EXT3_INDEX_EXTRA_TRANS_BLOCKS +
189 FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb)) * logs;
191 case FSFILT_OP_RENAME:
192 /* modify additional directory */
193 nblocks += FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb);
195 case FSFILT_OP_SYMLINK:
196 /* additional block + block bitmap + GDT for long symlink */
199 case FSFILT_OP_CREATE: {
200 #if defined(EXT3_EXTENTS_FL) && defined(EXT3_INDEX_FL)
203 if (!test_opt(inode->i_sb, EXTENTS)) {
205 } else if (((EXT3_I(inode)->i_flags &
206 cpu_to_le32(EXT3_EXTENTS_FL | EXT3_INDEX_FL)) ==
207 cpu_to_le32(EXT3_EXTENTS_FL | EXT3_INDEX_FL))) {
208 CWARN("extent-mapped directory found - contact "
209 "http://bugzilla.lustre.org/\n");
216 case FSFILT_OP_MKDIR:
217 case FSFILT_OP_MKNOD:
218 /* modify one inode + block bitmap + GDT */
222 /* modify parent directory */
223 nblocks += EXT3_INDEX_EXTRA_TRANS_BLOCKS +
224 FSFILT_DATA_TRANS_BLOCKS(inode->i_sb);
225 /* create/update logs for each stripe */
226 nblocks += (EXT3_INDEX_EXTRA_TRANS_BLOCKS +
227 FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb)) * logs;
229 case FSFILT_OP_SETATTR:
230 /* Setattr on inode */
232 nblocks += EXT3_INDEX_EXTRA_TRANS_BLOCKS +
233 FSFILT_DATA_TRANS_BLOCKS(inode->i_sb);
234 /* quota chown log for each stripe */
235 nblocks += (EXT3_INDEX_EXTRA_TRANS_BLOCKS +
236 FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb)) * logs;
238 case FSFILT_OP_CANCEL_UNLINK:
239 /* blocks for log header bitmap update OR
240 * blocks for catalog header bitmap update + unlink of logs */
241 nblocks = (LLOG_CHUNK_SIZE >> inode->i_blkbits) +
242 FSFILT_DELETE_TRANS_BLOCKS(inode->i_sb) * logs;
245 /* delete 2 file(file + array id) + create 1 file (array id)
246 * create/update logs for each stripe */
247 nblocks += 2 * FSFILT_DELETE_TRANS_BLOCKS(inode->i_sb);
249 /*create array log for head file*/
251 nblocks += (EXT3_INDEX_EXTRA_TRANS_BLOCKS +
252 FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb));
253 /*update head file array */
254 nblocks += EXT3_INDEX_EXTRA_TRANS_BLOCKS +
255 FSFILT_DATA_TRANS_BLOCKS(inode->i_sb);
257 default: CERROR("unknown transaction start op %d\n", op);
261 LASSERT(current->journal_info == desc_private);
262 journal = EXT3_SB(inode->i_sb)->s_journal;
263 if (nblocks > journal->j_max_transaction_buffers) {
264 CWARN("too many credits %d for op %ux%u using %d instead\n",
265 nblocks, op, logs, journal->j_max_transaction_buffers);
266 nblocks = journal->j_max_transaction_buffers;
270 LASSERTF(nblocks > 0, "can't start %d credit transaction\n", nblocks);
271 handle = fsfilt_ext3_journal_start(inode, nblocks);
274 LASSERT(current->journal_info == handle);
276 CERROR("error starting handle for op %u (%u credits): rc %ld\n",
277 op, nblocks, PTR_ERR(handle));
282 * Calculate the number of buffer credits needed to write multiple pages in
283 * a single ext3 transaction. No, this shouldn't be here, but as yet ext3
284 * doesn't have a nice API for calculating this sort of thing in advance.
286 * See comment above ext3_writepage_trans_blocks for details. We assume
287 * no data journaling is being done, but it does allow for all of the pages
288 * being non-contiguous. If we are guaranteed contiguous pages we could
289 * reduce the number of (d)indirect blocks a lot.
291 * With N blocks per page and P pages, for each inode we have at most:
293 * min(N*P, blocksize/4 + 1) dindirect blocks
296 * For the entire filesystem, we have at most:
297 * min(sum(nindir + P), ngroups) bitmap blocks (from the above)
298 * min(sum(nindir + P), gdblocks) group descriptor blocks (from the above)
299 * objcount inode blocks
301 * 2 * EXT3_SINGLEDATA_TRANS_BLOCKS for the quota files
303 * 1 EXT3_DATA_TRANS_BLOCKS for the last_rcvd update.
305 static int fsfilt_ext3_credits_needed(int objcount, struct fsfilt_objinfo *fso,
306 int niocount, struct niobuf_local *nb)
308 struct super_block *sb = fso->fso_dentry->d_inode->i_sb;
310 const int blockpp = 1 << (CFS_PAGE_SHIFT - sb->s_blocksize_bits);
311 int nbitmaps = 0, ngdblocks;
312 int needed = objcount + 1; /* inodes + superblock */
315 for (i = 0, j = 0; i < objcount; i++, fso++) {
316 /* two or more dindirect blocks in case we cross boundary */
317 int ndind = (long)((nb[j + fso->fso_bufcnt - 1].offset -
319 sb->s_blocksize_bits) /
320 (EXT3_ADDR_PER_BLOCK(sb) * EXT3_ADDR_PER_BLOCK(sb));
321 nbitmaps += min(fso->fso_bufcnt, ndind > 0 ? ndind : 2);
323 /* leaf, indirect, tindirect blocks for first block */
324 nbitmaps += blockpp + 2;
326 j += fso->fso_bufcnt;
329 next_indir = nb[0].offset +
330 (EXT3_ADDR_PER_BLOCK(sb) << sb->s_blocksize_bits);
331 for (i = 1; i < niocount; i++) {
332 if (nb[i].offset >= next_indir) {
333 nbitmaps++; /* additional indirect */
334 next_indir = nb[i].offset +
335 (EXT3_ADDR_PER_BLOCK(sb)<<sb->s_blocksize_bits);
336 } else if (nb[i].offset != nb[i - 1].offset + sb->s_blocksize) {
337 nbitmaps++; /* additional indirect */
339 nbitmaps += blockpp; /* each leaf in different group? */
342 ngdblocks = nbitmaps;
343 if (nbitmaps > EXT3_SB(sb)->s_groups_count)
344 nbitmaps = EXT3_SB(sb)->s_groups_count;
345 if (ngdblocks > EXT3_SB(sb)->s_gdb_count)
346 ngdblocks = EXT3_SB(sb)->s_gdb_count;
348 needed += nbitmaps + ngdblocks;
350 /* last_rcvd update */
351 needed += FSFILT_DATA_TRANS_BLOCKS(sb);
353 #if defined(CONFIG_QUOTA)
354 /* We assume that there will be 1 bit set in s_dquot.flags for each
355 * quota file that is active. This is at least true for now.
357 needed += hweight32(sb_any_quota_enabled(sb)) *
358 FSFILT_SINGLEDATA_TRANS_BLOCKS(sb);
364 /* We have to start a huge journal transaction here to hold all of the
365 * metadata for the pages being written here. This is necessitated by
366 * the fact that we do lots of prepare_write operations before we do
367 * any of the matching commit_write operations, so even if we split
368 * up to use "smaller" transactions none of them could complete until
369 * all of them were opened. By having a single journal transaction,
370 * we eliminate duplicate reservations for common blocks like the
371 * superblock and group descriptors or bitmaps.
373 * We will start the transaction here, but each prepare_write will
374 * add a refcount to the transaction, and each commit_write will
375 * remove a refcount. The transaction will be closed when all of
376 * the pages have been written.
378 static void *fsfilt_ext3_brw_start(int objcount, struct fsfilt_objinfo *fso,
379 int niocount, struct niobuf_local *nb,
380 void *desc_private, int logs)
387 LASSERT(current->journal_info == desc_private);
388 journal = EXT3_SB(fso->fso_dentry->d_inode->i_sb)->s_journal;
389 needed = fsfilt_ext3_credits_needed(objcount, fso, niocount, nb);
391 /* The number of blocks we could _possibly_ dirty can very large.
392 * We reduce our request if it is absurd (and we couldn't get that
393 * many credits for a single handle anyways).
395 * At some point we have to limit the size of I/Os sent at one time,
396 * increase the size of the journal, or we have to calculate the
397 * actual journal requirements more carefully by checking all of
398 * the blocks instead of being maximally pessimistic. It remains to
399 * be seen if this is a real problem or not.
401 if (needed > journal->j_max_transaction_buffers) {
402 CERROR("want too many journal credits (%d) using %d instead\n",
403 needed, journal->j_max_transaction_buffers);
404 needed = journal->j_max_transaction_buffers;
407 LASSERTF(needed > 0, "can't start %d credit transaction\n", needed);
408 handle = fsfilt_ext3_journal_start(fso->fso_dentry->d_inode, needed);
409 if (IS_ERR(handle)) {
410 CERROR("can't get handle for %d credits: rc = %ld\n", needed,
413 LASSERT(handle->h_buffer_credits >= needed);
414 LASSERT(current->journal_info == handle);
420 static int fsfilt_ext3_extend(struct inode *inode, unsigned int nblocks,void *h)
422 handle_t *handle = h;
424 /* fsfilt_extend called with nblocks = 0 for testing in special cases */
426 handle->h_buffer_credits = 0;
427 CWARN("setting credits of handle %p to zero by request\n", h);
430 if (handle->h_buffer_credits > nblocks)
432 if (journal_extend(handle, nblocks) == 0)
435 ext3_mark_inode_dirty(handle, inode);
436 return journal_restart(handle, nblocks);
439 static int fsfilt_ext3_commit(struct inode *inode, void *h, int force_sync)
442 handle_t *handle = h;
444 LASSERT(current->journal_info == handle);
446 handle->h_sync = 1; /* recovery likes this */
448 rc = fsfilt_ext3_journal_stop(handle);
453 static int fsfilt_ext3_commit_async(struct inode *inode, void *h,
457 transaction_t *transaction;
458 handle_t *handle = h;
462 LASSERT(current->journal_info == handle);
464 transaction = handle->h_transaction;
465 journal = transaction->t_journal;
466 tid = transaction->t_tid;
467 /* we don't want to be blocked */
469 rc = fsfilt_ext3_journal_stop(handle);
471 CERROR("error while stopping transaction: %d\n", rc);
474 log_start_commit(journal, tid);
476 *wait_handle = (void *) tid;
477 CDEBUG(D_INODE, "commit async: %lu\n", (unsigned long) tid);
481 static int fsfilt_ext3_commit_wait(struct inode *inode, void *h)
483 journal_t *journal = EXT3_JOURNAL(inode);
484 tid_t tid = (tid_t)(long)h;
486 CDEBUG(D_INODE, "commit wait: %lu\n", (unsigned long) tid);
487 if (unlikely(is_journal_aborted(journal)))
490 log_wait_commit(EXT3_JOURNAL(inode), tid);
492 if (unlikely(is_journal_aborted(journal)))
497 static int fsfilt_ext3_setattr(struct dentry *dentry, void *handle,
498 struct iattr *iattr, int do_trunc)
500 struct inode *inode = dentry->d_inode;
503 /* Avoid marking the inode dirty on the superblock list unnecessarily.
504 * We are already writing the inode to disk as part of this
505 * transaction and want to avoid a lot of extra inode writeout
506 * later on. b=9828 */
507 if (iattr->ia_valid & ATTR_SIZE && !do_trunc) {
508 /* ATTR_SIZE would invoke truncate: clear it */
509 iattr->ia_valid &= ~ATTR_SIZE;
510 EXT3_I(inode)->i_disksize = iattr->ia_size;
511 i_size_write(inode, iattr->ia_size);
513 if (iattr->ia_valid & ATTR_UID)
514 inode->i_uid = iattr->ia_uid;
515 if (iattr->ia_valid & ATTR_GID)
516 inode->i_gid = iattr->ia_gid;
517 if (iattr->ia_valid & ATTR_ATIME)
518 inode->i_atime = iattr->ia_atime;
519 if (iattr->ia_valid & ATTR_MTIME)
520 inode->i_mtime = iattr->ia_mtime;
521 if (iattr->ia_valid & ATTR_CTIME)
522 inode->i_ctime = iattr->ia_ctime;
523 if (iattr->ia_valid & ATTR_MODE) {
524 inode->i_mode = iattr->ia_mode;
526 if (!in_group_p(inode->i_gid) &&
527 !cfs_capable(CFS_CAP_FSETID))
528 inode->i_mode &= ~S_ISGID;
531 inode->i_sb->s_op->dirty_inode(inode);
536 /* Don't allow setattr to change file type */
537 if (iattr->ia_valid & ATTR_MODE)
538 iattr->ia_mode = (inode->i_mode & S_IFMT) |
539 (iattr->ia_mode & ~S_IFMT);
541 /* We set these flags on the client, but have already checked perms
542 * so don't confuse inode_change_ok. */
543 iattr->ia_valid &= ~(ATTR_MTIME_SET | ATTR_ATIME_SET);
545 if (inode->i_op->setattr) {
546 rc = inode->i_op->setattr(dentry, iattr);
548 rc = inode_change_ok(inode, iattr);
550 rc = inode_setattr(inode, iattr);
557 static int fsfilt_ext3_iocontrol(struct inode * inode, struct file *file,
558 unsigned int cmd, unsigned long arg)
563 /* FIXME: Can't do this because of nested transaction deadlock */
564 if (cmd == EXT3_IOC_SETFLAGS && (*(int *)arg) & EXT3_JOURNAL_DATA_FL) {
565 CERROR("can't set data journal flag on file\n");
569 if (inode->i_fop->ioctl)
570 rc = inode->i_fop->ioctl(inode, file, cmd, arg);
577 static int fsfilt_ext3_set_md(struct inode *inode, void *handle,
578 void *lmm, int lmm_size, const char *name)
582 LASSERT(TRYLOCK_INODE_MUTEX(inode) == 0);
584 rc = ext3_xattr_set_handle(handle, inode, EXT3_XATTR_INDEX_TRUSTED,
585 name, lmm, lmm_size, XATTR_NO_CTIME);
588 if (rc && rc != -EROFS)
589 CERROR("error adding MD data to inode %lu: rc = %d\n",
594 /* Must be called with i_mutex held */
595 static int fsfilt_ext3_get_md(struct inode *inode, void *lmm, int lmm_size,
600 LASSERT(TRYLOCK_INODE_MUTEX(inode) == 0);
602 rc = ext3_xattr_get(inode, EXT3_XATTR_INDEX_TRUSTED,
603 name, lmm, lmm_size);
605 /* This gives us the MD size */
607 return (rc == -ENODATA) ? 0 : rc;
610 CDEBUG(D_INFO, "error getting EA %d/%s from inode %lu: rc %d\n",
611 EXT3_XATTR_INDEX_TRUSTED, name,
613 memset(lmm, 0, lmm_size);
614 return (rc == -ENODATA) ? 0 : rc;
620 static int fsfilt_ext3_send_bio(int rw, struct inode *inode, struct bio *bio)
626 static ssize_t fsfilt_ext3_readpage(struct file *file, char *buf, size_t count,
629 struct inode *inode = file->f_dentry->d_inode;
632 if (S_ISREG(inode->i_mode))
633 rc = file->f_op->read(file, buf, count, off);
635 const int blkbits = inode->i_sb->s_blocksize_bits;
636 const int blksize = inode->i_sb->s_blocksize;
638 CDEBUG(D_EXT2, "reading "LPSZ" at dir %lu+%llu\n",
639 count, inode->i_ino, *off);
641 struct buffer_head *bh;
644 if (*off < i_size_read(inode)) {
647 bh = ext3_bread(NULL, inode, *off >> blkbits,
650 CDEBUG(D_EXT2, "read %u@%llu\n", blksize, *off);
653 memcpy(buf, bh->b_data, blksize);
656 /* XXX in theory we should just fake
657 * this buffer and continue like ext3,
658 * especially if this is a partial read
660 CERROR("error read dir %lu+%llu: %d\n",
661 inode->i_ino, *off, err);
666 struct ext3_dir_entry_2 *fake = (void *)buf;
668 CDEBUG(D_EXT2, "fake %u@%llu\n", blksize, *off);
669 memset(fake, 0, sizeof(*fake));
670 fake->rec_len = cpu_to_le16(blksize);
682 static void fsfilt_ext3_cb_func(struct journal_callback *jcb, int error)
684 struct fsfilt_cb_data *fcb = (struct fsfilt_cb_data *)jcb;
686 fcb->cb_func(fcb->cb_obd, fcb->cb_last_rcvd, fcb->cb_data, error);
688 OBD_SLAB_FREE(fcb, fcb_cache, sizeof *fcb);
691 static int fsfilt_ext3_add_journal_cb(struct obd_device *obd, __u64 last_rcvd,
692 void *handle, fsfilt_cb_t cb_func,
695 struct fsfilt_cb_data *fcb;
697 OBD_SLAB_ALLOC(fcb, fcb_cache, CFS_ALLOC_IO, sizeof *fcb);
701 fcb->cb_func = cb_func;
703 fcb->cb_last_rcvd = last_rcvd;
704 fcb->cb_data = cb_data;
706 CDEBUG(D_EXT2, "set callback for last_rcvd: "LPD64"\n", last_rcvd);
707 journal_callback_set(handle, fsfilt_ext3_cb_func,
708 (struct journal_callback *)fcb);
714 * We need to hack the return value for the free inode counts because
715 * the current EA code requires one filesystem block per inode with EAs,
716 * so it is possible to run out of blocks before we run out of inodes.
718 * This can be removed when the ext3 EA code is fixed.
720 static int fsfilt_ext3_statfs(struct super_block *sb, struct obd_statfs *osfs)
725 memset(&sfs, 0, sizeof(sfs));
727 rc = ll_do_statfs(sb, &sfs);
729 if (!rc && sfs.f_bfree < sfs.f_ffree) {
730 sfs.f_files = (sfs.f_files - sfs.f_ffree) + sfs.f_bfree;
731 sfs.f_ffree = sfs.f_bfree;
734 statfs_pack(osfs, &sfs);
738 static int fsfilt_ext3_sync(struct super_block *sb)
740 return ext3_force_commit(sb);
743 #if defined(EXT3_MULTIBLOCK_ALLOCATOR) && (!defined(EXT3_EXT_CACHE_NO) || defined(EXT_CACHE_MARK))
744 #warning "kernel code has old extents/mballoc patch, disabling"
745 #undef EXT3_MULTIBLOCK_ALLOCATOR
747 #ifndef EXT3_EXTENTS_FL
748 #define EXT3_EXTENTS_FL 0x00080000 /* Inode uses extents */
751 #ifdef EXT3_MULTIBLOCK_ALLOCATOR
752 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
753 #define ext3_up_truncate_sem(inode) up(&EXT3_I(inode)->truncate_sem);
754 #define ext3_down_truncate_sem(inode) down(&EXT3_I(inode)->truncate_sem);
756 #define ext3_up_truncate_sem(inode) mutex_unlock(&EXT3_I(inode)->truncate_mutex);
757 #define ext3_down_truncate_sem(inode) mutex_lock(&EXT3_I(inode)->truncate_mutex);
761 #define EXT_ASSERT(cond) BUG_ON(!(cond))
764 #ifdef EXT3_EXT_HAS_NO_TREE
765 /* for kernels 2.6.18 and later */
766 #define ext3_ext_base inode
767 #define ext3_ext_base2inode(inode) (inode)
768 #define EXT_DEPTH(inode) ext_depth(inode)
769 #define EXT_GENERATION(inode) ext_generation(inode)
770 #define fsfilt_ext3_ext_walk_space(inode, block, num, cb, cbdata) \
771 ext3_ext_walk_space(inode, block, num, cb, cbdata);
773 #define ext3_ext_base ext3_extents_tree
774 #define ext3_ext_base2inode(tree) (tree->inode)
775 #define fsfilt_ext3_ext_walk_space(tree, block, num, cb, cbdata) \
776 ext3_ext_walk_space(tree, block, num, cb);
779 #include <linux/lustre_version.h>
780 #if EXT3_EXT_MAGIC == 0xf301
781 #define ee_start e_start
782 #define ee_block e_block
785 #ifndef EXT3_BB_MAX_BLOCKS
786 #define ext3_mb_new_blocks(handle, inode, goal, count, aflags, err) \
787 ext3_new_blocks(handle, inode, count, goal, err)
791 unsigned long *blocks;
799 static int ext3_ext_find_goal(struct inode *inode, struct ext3_ext_path *path,
800 unsigned long block, int *aflags)
802 struct ext3_inode_info *ei = EXT3_I(inode);
803 unsigned long bg_start;
804 unsigned long colour;
808 struct ext3_extent *ex;
809 depth = path->p_depth;
811 /* try to predict block placement */
812 if ((ex = path[depth].p_ext)) {
814 /* This prefers to eat into a contiguous extent
815 * rather than find an extent that the whole
816 * request will fit into. This can fragment data
817 * block allocation and prevents our lovely 1M I/Os
818 * from reaching the disk intact. */
819 if (ex->ee_block + ex->ee_len == block)
822 return ex->ee_start + (block - ex->ee_block);
825 /* it looks index is empty
826 * try to find starting from index itself */
827 if (path[depth].p_bh)
828 return path[depth].p_bh->b_blocknr;
831 /* OK. use inode's group */
832 bg_start = (ei->i_block_group * EXT3_BLOCKS_PER_GROUP(inode->i_sb)) +
833 le32_to_cpu(EXT3_SB(inode->i_sb)->s_es->s_first_data_block);
834 colour = (current->pid % 16) *
835 (EXT3_BLOCKS_PER_GROUP(inode->i_sb) / 16);
836 return bg_start + colour + block;
839 #define ll_unmap_underlying_metadata(sb, blocknr) \
840 unmap_underlying_metadata((sb)->s_bdev, blocknr)
842 #ifndef EXT3_MB_HINT_GROUP_ALLOC
843 static unsigned long new_blocks(handle_t *handle, struct ext3_ext_base *base,
844 struct ext3_ext_path *path, unsigned long block,
845 unsigned long *count, int *err)
847 unsigned long pblock, goal;
849 struct inode *inode = ext3_ext_base2inode(base);
851 goal = ext3_ext_find_goal(inode, path, block, &aflags);
852 aflags |= 2; /* block have been already reserved */
853 pblock = ext3_mb_new_blocks(handle, inode, goal, count, aflags, err);
858 static unsigned long new_blocks(handle_t *handle, struct ext3_ext_base *base,
859 struct ext3_ext_path *path, unsigned long block,
860 unsigned long *count, int *err)
862 struct inode *inode = ext3_ext_base2inode(base);
863 struct ext3_allocation_request ar;
864 unsigned long pblock;
867 /* find neighbour allocated blocks */
869 *err = ext3_ext_search_left(base, path, &ar.lleft, &ar.pleft);
873 *err = ext3_ext_search_right(base, path, &ar.lright, &ar.pright);
877 /* allocate new block */
878 ar.goal = ext3_ext_find_goal(inode, path, block, &aflags);
882 ar.flags = EXT3_MB_HINT_DATA;
883 pblock = ext3_mb_new_blocks(handle, &ar, err);
890 #ifdef EXT3_EXT_HAS_NO_TREE
891 static int ext3_ext_new_extent_cb(struct ext3_ext_base *base,
892 struct ext3_ext_path *path,
893 struct ext3_ext_cache *cex,
894 #ifdef HAVE_EXT_PREPARE_CB_EXTENT
895 struct ext3_extent *ex,
899 struct bpointers *bp = cbdata;
901 static int ext3_ext_new_extent_cb(struct ext3_ext_base *base,
902 struct ext3_ext_path *path,
903 struct ext3_ext_cache *cex
904 #ifdef HAVE_EXT_PREPARE_CB_EXTENT
905 , struct ext3_extent *ex
909 struct bpointers *bp = base->private;
911 struct inode *inode = ext3_ext_base2inode(base);
912 struct ext3_extent nex;
913 unsigned long pblock;
920 EXT_ASSERT(i == path->p_depth);
921 EXT_ASSERT(path[i].p_hdr);
923 if (cex->ec_type == EXT3_EXT_CACHE_EXTENT) {
928 if (bp->create == 0) {
930 if (cex->ec_block < bp->start)
931 i = bp->start - cex->ec_block;
932 if (i >= cex->ec_len)
933 CERROR("nothing to do?! i = %d, e_num = %u\n",
935 for (; i < cex->ec_len && bp->num; i++) {
947 tgen = EXT_GENERATION(base);
948 count = ext3_ext_calc_credits_for_insert(base, path);
949 ext3_up_truncate_sem(inode);
951 handle = fsfilt_ext3_journal_start(inode, count+EXT3_ALLOC_NEEDED+1);
952 if (IS_ERR(handle)) {
953 ext3_down_truncate_sem(inode);
954 return PTR_ERR(handle);
957 ext3_down_truncate_sem(inode);
958 if (tgen != EXT_GENERATION(base)) {
959 /* the tree has changed. so path can be invalid at moment */
960 fsfilt_ext3_journal_stop(handle);
965 pblock = new_blocks(handle, base, path, cex->ec_block, &count, &err);
968 EXT_ASSERT(count <= cex->ec_len);
970 /* insert new extent */
971 nex.ee_block = cex->ec_block;
972 nex.ee_start = pblock;
974 err = ext3_ext_insert_extent(handle, base, path, &nex);
976 /* free data blocks we just allocated */
977 /* not a good idea to call discard here directly,
978 * but otherwise we'd need to call it every free() */
979 #ifdef EXT3_MB_HINT_GROUP_ALLOC
980 ext3_mb_discard_inode_preallocations(inode);
982 ext3_free_blocks(handle, inode, nex.ee_start, nex.ee_len, 0);
987 * Putting len of the actual extent we just inserted,
988 * we are asking ext3_ext_walk_space() to continue
989 * scaning after that block
991 cex->ec_len = nex.ee_len;
992 cex->ec_start = nex.ee_start;
993 BUG_ON(nex.ee_len == 0);
994 BUG_ON(nex.ee_block != cex->ec_block);
997 fsfilt_ext3_journal_stop(handle);
1002 CERROR("hmm. why do we find this extent?\n");
1003 CERROR("initial space: %lu:%u\n",
1004 bp->start, bp->init_num);
1005 CERROR("current extent: %u/%u/%u %d\n",
1006 cex->ec_block, cex->ec_len,
1007 cex->ec_start, cex->ec_type);
1010 if (cex->ec_block < bp->start)
1011 i = bp->start - cex->ec_block;
1012 if (i >= cex->ec_len)
1013 CERROR("nothing to do?! i = %d, e_num = %u\n",
1015 for (; i < cex->ec_len && bp->num; i++) {
1016 *(bp->blocks) = cex->ec_start + i;
1017 if (cex->ec_type == EXT3_EXT_CACHE_EXTENT) {
1021 /* unmap any possible underlying metadata from
1022 * the block device mapping. bug 6998. */
1023 ll_unmap_underlying_metadata(inode->i_sb,
1035 int fsfilt_map_nblocks(struct inode *inode, unsigned long block,
1036 unsigned long num, unsigned long *blocks,
1037 int *created, int create)
1039 #ifdef EXT3_EXT_HAS_NO_TREE
1040 struct ext3_ext_base *base = inode;
1042 struct ext3_extents_tree tree;
1043 struct ext3_ext_base *base = &tree;
1045 struct bpointers bp;
1048 CDEBUG(D_OTHER, "blocks %lu-%lu requested for inode %u\n",
1049 block, block + num - 1, (unsigned) inode->i_ino);
1051 #ifndef EXT3_EXT_HAS_NO_TREE
1052 ext3_init_tree_desc(base, inode);
1056 bp.created = created;
1058 bp.init_num = bp.num = num;
1061 ext3_down_truncate_sem(inode);
1062 err = fsfilt_ext3_ext_walk_space(base, block, num,
1063 ext3_ext_new_extent_cb, &bp);
1064 ext3_ext_invalidate_cache(base);
1065 ext3_up_truncate_sem(inode);
1070 int fsfilt_ext3_map_ext_inode_pages(struct inode *inode, struct page **page,
1071 int pages, unsigned long *blocks,
1072 int *created, int create)
1074 int blocks_per_page = CFS_PAGE_SIZE >> inode->i_blkbits;
1076 struct page *fp = NULL;
1079 CDEBUG(D_OTHER, "inode %lu: map %d pages from %lu\n",
1080 inode->i_ino, pages, (*page)->index);
1082 /* pages are sorted already. so, we just have to find
1083 * contig. space and process them properly */
1086 /* start new extent */
1091 } else if (fp->index + clen == (*page)->index) {
1092 /* continue the extent */
1099 /* process found extent */
1100 rc = fsfilt_map_nblocks(inode, fp->index * blocks_per_page,
1101 clen * blocks_per_page, blocks,
1106 /* look for next extent */
1108 blocks += blocks_per_page * clen;
1109 created += blocks_per_page * clen;
1113 rc = fsfilt_map_nblocks(inode, fp->index * blocks_per_page,
1114 clen * blocks_per_page, blocks,
1119 #endif /* EXT3_MULTIBLOCK_ALLOCATOR */
1121 extern int ext3_map_inode_page(struct inode *inode, struct page *page,
1122 unsigned long *blocks, int *created, int create);
1123 int fsfilt_ext3_map_bm_inode_pages(struct inode *inode, struct page **page,
1124 int pages, unsigned long *blocks,
1125 int *created, int create)
1127 int blocks_per_page = CFS_PAGE_SIZE >> inode->i_blkbits;
1131 for (i = 0, cr = created, b = blocks; i < pages; i++, page++) {
1132 rc = ext3_map_inode_page(inode, *page, b, cr, create);
1134 CERROR("ino %lu, blk %lu cr %u create %d: rc %d\n",
1135 inode->i_ino, *b, *cr, create, rc);
1139 b += blocks_per_page;
1140 cr += blocks_per_page;
1145 int fsfilt_ext3_map_inode_pages(struct inode *inode, struct page **page,
1146 int pages, unsigned long *blocks,
1147 int *created, int create,
1148 struct semaphore *optional_sem)
1151 #ifdef EXT3_MULTIBLOCK_ALLOCATOR
1152 if (EXT3_I(inode)->i_flags & EXT3_EXTENTS_FL) {
1153 rc = fsfilt_ext3_map_ext_inode_pages(inode, page, pages,
1154 blocks, created, create);
1158 if (optional_sem != NULL)
1160 rc = fsfilt_ext3_map_bm_inode_pages(inode, page, pages, blocks,
1162 if (optional_sem != NULL)
1168 int fsfilt_ext3_read(struct inode *inode, void *buf, int size, loff_t *offs)
1170 unsigned long block;
1171 struct buffer_head *bh;
1172 int err, blocksize, csize, boffs, osize = size;
1174 /* prevent reading after eof */
1176 if (i_size_read(inode) < *offs + size) {
1177 size = i_size_read(inode) - *offs;
1180 CERROR("size %llu is too short for read %u@%llu\n",
1181 i_size_read(inode), size, *offs);
1183 } else if (size == 0) {
1190 blocksize = 1 << inode->i_blkbits;
1193 block = *offs >> inode->i_blkbits;
1194 boffs = *offs & (blocksize - 1);
1195 csize = min(blocksize - boffs, size);
1196 bh = ext3_bread(NULL, inode, block, 0, &err);
1198 CERROR("can't read block: %d\n", err);
1202 memcpy(buf, bh->b_data + boffs, csize);
1211 EXPORT_SYMBOL(fsfilt_ext3_read);
1213 static int fsfilt_ext3_read_record(struct file * file, void *buf,
1214 int size, loff_t *offs)
1217 rc = fsfilt_ext3_read(file->f_dentry->d_inode, buf, size, offs);
1223 int fsfilt_ext3_write_handle(struct inode *inode, void *buf, int bufsize,
1224 loff_t *offs, handle_t *handle)
1226 struct buffer_head *bh = NULL;
1227 loff_t old_size = i_size_read(inode), offset = *offs;
1228 loff_t new_size = i_size_read(inode);
1229 unsigned long block;
1230 int err = 0, blocksize = 1 << inode->i_blkbits, size, boffs;
1232 while (bufsize > 0) {
1236 block = offset >> inode->i_blkbits;
1237 boffs = offset & (blocksize - 1);
1238 size = min(blocksize - boffs, bufsize);
1239 bh = ext3_bread(handle, inode, block, 1, &err);
1241 CERROR("can't read/create block: %d\n", err);
1245 err = ext3_journal_get_write_access(handle, bh);
1247 CERROR("journal_get_write_access() returned error %d\n",
1251 LASSERT(bh->b_data + boffs + size <= bh->b_data + bh->b_size);
1252 memcpy(bh->b_data + boffs, buf, size);
1253 err = ext3_journal_dirty_metadata(handle, bh);
1255 CERROR("journal_dirty_metadata() returned error %d\n",
1259 if (offset + size > new_size)
1260 new_size = offset + size;
1268 /* correct in-core and on-disk sizes */
1269 if (new_size > i_size_read(inode)) {
1271 if (new_size > i_size_read(inode))
1272 i_size_write(inode, new_size);
1273 if (i_size_read(inode) > EXT3_I(inode)->i_disksize)
1274 EXT3_I(inode)->i_disksize = i_size_read(inode);
1275 if (i_size_read(inode) > old_size)
1276 mark_inode_dirty(inode);
1284 EXPORT_SYMBOL(fsfilt_ext3_write_handle);
1286 static int fsfilt_ext3_write_record(struct file *file, void *buf, int bufsize,
1287 loff_t *offs, int force_sync)
1289 struct inode *inode = file->f_dentry->d_inode;
1291 int err, block_count = 0, blocksize;
1293 /* Determine how many transaction credits are needed */
1294 blocksize = 1 << inode->i_blkbits;
1295 block_count = (*offs & (blocksize - 1)) + bufsize;
1296 block_count = (block_count + blocksize - 1) >> inode->i_blkbits;
1298 handle = fsfilt_ext3_journal_start(inode,
1299 block_count * FSFILT_DATA_TRANS_BLOCKS(inode->i_sb) + 2);
1300 if (IS_ERR(handle)) {
1301 CERROR("can't start transaction for %d blocks (%d bytes)\n",
1302 block_count * FSFILT_DATA_TRANS_BLOCKS(inode->i_sb) + 2, bufsize);
1303 return PTR_ERR(handle);
1306 err = fsfilt_ext3_write_handle(inode, buf, bufsize, offs, handle);
1308 if (!err && force_sync)
1309 handle->h_sync = 1; /* recovery likes this */
1311 fsfilt_ext3_journal_stop(handle);
1316 static int fsfilt_ext3_setup(struct super_block *sb)
1319 EXT3_SB(sb)->dx_lock = fsfilt_ext3_dx_lock;
1320 EXT3_SB(sb)->dx_unlock = fsfilt_ext3_dx_unlock;
1323 CWARN("Enabling PDIROPS\n");
1324 set_opt(EXT3_SB(sb)->s_mount_opt, PDIROPS);
1325 sb->s_flags |= S_PDIROPS;
1327 if (!EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_DIR_INDEX))
1328 CWARN("filesystem doesn't have dir_index feature enabled\n");
1329 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,13)) && defined(HAVE_QUOTA_SUPPORT)
1330 set_opt(EXT3_SB(sb)->s_mount_opt, QUOTA);
1335 /* If fso is NULL, op is FSFILT operation, otherwise op is number of fso
1336 objects. Logs is number of logfiles to update */
1337 static int fsfilt_ext3_get_op_len(int op, struct fsfilt_objinfo *fso, int logs)
1341 case FSFILT_OP_CREATE:
1342 /* directory leaf, index & indirect & EA*/
1343 return 4 + 3 * logs;
1344 case FSFILT_OP_UNLINK:
1350 struct super_block *sb = fso->fso_dentry->d_inode->i_sb;
1351 int blockpp = 1 << (CFS_PAGE_SHIFT - sb->s_blocksize_bits);
1352 int addrpp = EXT3_ADDR_PER_BLOCK(sb) * blockpp;
1353 for (i = 0; i < op; i++, fso++) {
1354 int nblocks = fso->fso_bufcnt * blockpp;
1355 int ndindirect = min(nblocks, addrpp + 1);
1356 int nindir = nblocks + ndindirect + 1;
1360 return needed + 3 * logs;
1366 static const char *op_quotafile[] = { "lquota.user", "lquota.group" };
1368 #define DQINFO_COPY(out, in) \
1370 Q_COPY(out, in, dqi_bgrace); \
1371 Q_COPY(out, in, dqi_igrace); \
1372 Q_COPY(out, in, dqi_flags); \
1373 Q_COPY(out, in, dqi_valid); \
1376 #define DQBLK_COPY(out, in) \
1378 Q_COPY(out, in, dqb_bhardlimit); \
1379 Q_COPY(out, in, dqb_bsoftlimit); \
1380 Q_COPY(out, in, dqb_curspace); \
1381 Q_COPY(out, in, dqb_ihardlimit); \
1382 Q_COPY(out, in, dqb_isoftlimit); \
1383 Q_COPY(out, in, dqb_curinodes); \
1384 Q_COPY(out, in, dqb_btime); \
1385 Q_COPY(out, in, dqb_itime); \
1386 Q_COPY(out, in, dqb_valid); \
1391 static int fsfilt_ext3_quotactl(struct super_block *sb,
1392 struct obd_quotactl *oqc)
1394 int i, rc = 0, error = 0;
1395 struct quotactl_ops *qcop;
1396 struct if_dqinfo *info;
1397 struct if_dqblk *dqblk;
1403 OBD_ALLOC_PTR(info);
1406 OBD_ALLOC_PTR(dqblk);
1412 DQINFO_COPY(info, &oqc->qc_dqinfo);
1413 DQBLK_COPY(dqblk, &oqc->qc_dqblk);
1416 if (oqc->qc_cmd == Q_QUOTAON || oqc->qc_cmd == Q_QUOTAOFF) {
1417 for (i = 0; i < MAXQUOTAS; i++) {
1418 if (!Q_TYPESET(oqc, i))
1421 if (oqc->qc_cmd == Q_QUOTAON) {
1422 if (!qcop->quota_on)
1423 GOTO(out, rc = -ENOSYS);
1424 rc = qcop->quota_on(sb, i, oqc->qc_id,
1425 (char *)op_quotafile[i]);
1426 } else if (oqc->qc_cmd == Q_QUOTAOFF) {
1427 if (!qcop->quota_off)
1428 GOTO(out, rc = -ENOSYS);
1429 rc = qcop->quota_off(sb, i);
1437 GOTO(out, rc ?: error);
1440 switch (oqc->qc_cmd) {
1443 if (!qcop->get_info)
1444 GOTO(out, rc = -ENOSYS);
1445 rc = qcop->get_info(sb, oqc->qc_type, info);
1449 if (!qcop->set_dqblk)
1450 GOTO(out, rc = -ENOSYS);
1451 rc = qcop->set_dqblk(sb, oqc->qc_type, oqc->qc_id, dqblk);
1455 if (!qcop->get_dqblk)
1456 GOTO(out, rc = -ENOSYS);
1457 rc = qcop->get_dqblk(sb, oqc->qc_type, oqc->qc_id, dqblk);
1460 if (!sb->s_qcop->quota_sync)
1461 GOTO(out, rc = -ENOSYS);
1462 qcop->quota_sync(sb, oqc->qc_type);
1465 CERROR("unsupported quotactl command: %d", oqc->qc_cmd);
1469 DQINFO_COPY(&oqc->qc_dqinfo, info);
1470 DQBLK_COPY(&oqc->qc_dqblk, dqblk);
1473 OBD_FREE_PTR(dqblk);
1476 CDEBUG(D_QUOTA, "quotactl command %#x, id %u, type %d "
1478 oqc->qc_cmd, oqc->qc_id, oqc->qc_type, rc);
1483 struct hlist_node dqb_hash; /* quotacheck hash */
1484 struct list_head dqb_list; /* in list also */
1485 qid_t dqb_id; /* uid/gid */
1486 short dqb_type; /* USRQUOTA/GRPQUOTA */
1487 __u32 dqb_bhardlimit; /* block hard limit */
1488 __u32 dqb_bsoftlimit; /* block soft limit */
1489 qsize_t dqb_curspace; /* current space */
1490 __u32 dqb_ihardlimit; /* inode hard limit */
1491 __u32 dqb_isoftlimit; /* inode soft limit */
1492 __u32 dqb_curinodes; /* current inodes */
1493 __u64 dqb_btime; /* block grace time */
1494 __u64 dqb_itime; /* inode grace time */
1495 __u32 dqb_valid; /* flag for above fields */
1498 static inline unsigned int chkquot_hash(qid_t id, int type)
1499 __attribute__((__const__));
1501 static inline unsigned int chkquot_hash(qid_t id, int type)
1503 return (id * (MAXQUOTAS - type)) % NR_DQHASH;
1506 static inline struct chk_dqblk *
1507 find_chkquot(struct hlist_head *head, qid_t id, int type)
1509 struct hlist_node *node;
1510 struct chk_dqblk *cdqb;
1512 hlist_for_each(node, head) {
1513 cdqb = hlist_entry(node, struct chk_dqblk, dqb_hash);
1514 if (cdqb->dqb_id == id && cdqb->dqb_type == type)
1521 static struct chk_dqblk *alloc_chkquot(qid_t id, int type)
1523 struct chk_dqblk *cdqb;
1525 OBD_ALLOC_PTR(cdqb);
1527 INIT_HLIST_NODE(&cdqb->dqb_hash);
1528 INIT_LIST_HEAD(&cdqb->dqb_list);
1530 cdqb->dqb_type = type;
1536 static struct chk_dqblk *
1537 cqget(struct super_block *sb, struct hlist_head *hash, struct list_head *list,
1538 qid_t id, int type, int first_check)
1540 struct hlist_head *head = hash + chkquot_hash(id, type);
1541 struct if_dqblk dqb;
1542 struct chk_dqblk *cdqb;
1545 cdqb = find_chkquot(head, id, type);
1549 cdqb = alloc_chkquot(id, type);
1554 rc = sb->s_qcop->get_dqblk(sb, type, id, &dqb);
1556 CERROR("get_dqblk of id %u, type %d failed: %d\n",
1559 DQBLK_COPY(cdqb, &dqb);
1560 cdqb->dqb_curspace = 0;
1561 cdqb->dqb_curinodes = 0;
1565 hlist_add_head(&cdqb->dqb_hash, head);
1566 list_add_tail(&cdqb->dqb_list, list);
1571 static inline int quota_onoff(struct super_block *sb, int cmd, int type)
1573 struct obd_quotactl *oqctl;
1576 OBD_ALLOC_PTR(oqctl);
1580 oqctl->qc_cmd = cmd;
1581 oqctl->qc_id = QFMT_LDISKFS;
1582 oqctl->qc_type = type;
1583 rc = fsfilt_ext3_quotactl(sb, oqctl);
1585 OBD_FREE_PTR(oqctl);
1589 static inline int read_old_dqinfo(struct super_block *sb, int type,
1590 struct if_dqinfo *dqinfo)
1592 struct obd_quotactl *oqctl;
1596 OBD_ALLOC_PTR(oqctl);
1600 oqctl->qc_cmd = Q_GETINFO;
1601 oqctl->qc_type = type;
1602 rc = fsfilt_ext3_quotactl(sb, oqctl);
1604 ((struct obd_dqinfo *)dqinfo)[type] = oqctl->qc_dqinfo;
1606 OBD_FREE_PTR(oqctl);
1610 static inline struct ext3_group_desc *
1611 get_group_desc(struct super_block *sb, int group)
1613 unsigned long desc_block, desc;
1614 struct ext3_group_desc *gdp;
1616 desc_block = group / EXT3_DESC_PER_BLOCK(sb);
1617 desc = group % EXT3_DESC_PER_BLOCK(sb);
1618 gdp = (struct ext3_group_desc *)
1619 EXT3_SB(sb)->s_group_desc[desc_block]->b_data;
1624 static inline struct buffer_head *
1625 read_inode_bitmap(struct super_block *sb, unsigned long group)
1627 struct ext3_group_desc *desc;
1628 struct buffer_head *bh;
1630 desc = get_group_desc(sb, group);
1631 bh = sb_bread(sb, le32_to_cpu(desc->bg_inode_bitmap));
1636 static inline struct inode *ext3_iget_inuse(struct super_block *sb,
1637 struct buffer_head *bitmap_bh,
1638 int index, unsigned long ino)
1640 struct inode *inode = NULL;
1642 if (ext3_test_bit(index, bitmap_bh->b_data))
1643 inode = iget(sb, ino);
1649 struct hlist_head qckt_hash[NR_DQHASH]; /* quotacheck hash */
1650 struct list_head qckt_list; /* quotacheck list */
1651 int qckt_first_check[MAXQUOTAS]; /* 1 if no old quotafile */
1652 struct if_dqinfo qckt_dqinfo[MAXQUOTAS]; /* old dqinfo */
1655 static int add_inode_quota(struct inode *inode, struct qchk_ctxt *qctxt,
1656 struct obd_quotactl *oqc)
1658 struct chk_dqblk *cdqb[MAXQUOTAS] = { NULL, };
1660 qid_t qid[MAXQUOTAS];
1666 qid[USRQUOTA] = inode->i_uid;
1667 qid[GRPQUOTA] = inode->i_gid;
1669 if (S_ISDIR(inode->i_mode) ||
1670 S_ISREG(inode->i_mode) ||
1671 S_ISLNK(inode->i_mode))
1672 size = inode_get_bytes(inode);
1674 for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
1675 if (!Q_TYPESET(oqc, cnt))
1678 cdqb[cnt] = cqget(inode->i_sb, qctxt->qckt_hash,
1679 &qctxt->qckt_list, qid[cnt], cnt,
1680 qctxt->qckt_first_check[cnt]);
1686 cdqb[cnt]->dqb_curspace += size;
1687 cdqb[cnt]->dqb_curinodes++;
1691 for (i = 0; i < cnt; i++) {
1692 if (!Q_TYPESET(oqc, i))
1695 cdqb[i]->dqb_curspace -= size;
1696 cdqb[i]->dqb_curinodes--;
1703 static int v2_write_dqheader(struct file *f, int type)
1705 static const __u32 quota_magics[] = V2_INITQMAGICS;
1706 static const __u32 quota_versions[] = V2_INITQVERSIONS;
1707 struct v2_disk_dqheader dqhead;
1710 CLASSERT(ARRAY_SIZE(quota_magics) == ARRAY_SIZE(quota_versions));
1711 LASSERT(0 <= type && type < ARRAY_SIZE(quota_magics));
1713 dqhead.dqh_magic = cpu_to_le32(quota_magics[type]);
1714 dqhead.dqh_version = cpu_to_le32(quota_versions[type]);
1716 return cfs_user_write(f, (char *)&dqhead, sizeof(dqhead), &offset);
1719 /* write dqinfo struct in a new quota file */
1720 static int v2_write_dqinfo(struct file *f, int type, struct if_dqinfo *info)
1722 struct v2_disk_dqinfo dqinfo;
1723 __u32 blocks = V2_DQTREEOFF + 1;
1724 loff_t offset = V2_DQINFOOFF;
1727 dqinfo.dqi_bgrace = cpu_to_le32(info->dqi_bgrace);
1728 dqinfo.dqi_igrace = cpu_to_le32(info->dqi_igrace);
1729 dqinfo.dqi_flags = cpu_to_le32(info->dqi_flags & DQF_MASK &
1732 dqinfo.dqi_bgrace = cpu_to_le32(MAX_DQ_TIME);
1733 dqinfo.dqi_igrace = cpu_to_le32(MAX_IQ_TIME);
1734 dqinfo.dqi_flags = 0;
1737 dqinfo.dqi_blocks = cpu_to_le32(blocks);
1738 dqinfo.dqi_free_blk = 0;
1739 dqinfo.dqi_free_entry = 0;
1741 return cfs_user_write(f, (char *)&dqinfo, sizeof(dqinfo), &offset);
1744 static int create_new_quota_files(struct qchk_ctxt *qctxt,
1745 struct obd_quotactl *oqc)
1750 for (i = 0; i < MAXQUOTAS; i++) {
1751 struct if_dqinfo *info = qctxt->qckt_first_check[i]?
1752 NULL : &qctxt->qckt_dqinfo[i];
1755 if (!Q_TYPESET(oqc, i))
1758 file = filp_open(op_quotafile[i], O_RDWR | O_CREAT | O_TRUNC,
1762 CERROR("can't create %s file: rc = %d\n",
1763 op_quotafile[i], rc);
1767 if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
1768 CERROR("file %s is not regular", op_quotafile[i]);
1769 filp_close(file, 0);
1770 GOTO(out, rc = -EINVAL);
1773 rc = v2_write_dqheader(file, i);
1775 filp_close(file, 0);
1779 rc = v2_write_dqinfo(file, i, info);
1780 filp_close(file, 0);
1790 static int commit_chkquot(struct super_block *sb, struct qchk_ctxt *qctxt,
1791 struct chk_dqblk *cdqb)
1793 struct obd_quotactl *oqc;
1802 now = cfs_time_current_sec();
1804 if (cdqb->dqb_bsoftlimit &&
1805 toqb(cdqb->dqb_curspace) >= cdqb->dqb_bsoftlimit &&
1808 now + qctxt->qckt_dqinfo[cdqb->dqb_type].dqi_bgrace;
1810 if (cdqb->dqb_isoftlimit &&
1811 cdqb->dqb_curinodes >= cdqb->dqb_isoftlimit &&
1814 now + qctxt->qckt_dqinfo[cdqb->dqb_type].dqi_igrace;
1816 cdqb->dqb_valid = QIF_ALL;
1818 oqc->qc_cmd = Q_SETQUOTA;
1819 oqc->qc_type = cdqb->dqb_type;
1820 oqc->qc_id = cdqb->dqb_id;
1821 DQBLK_COPY(&oqc->qc_dqblk, cdqb);
1823 rc = fsfilt_ext3_quotactl(sb, oqc);
1828 static int prune_chkquots(struct super_block *sb,
1829 struct qchk_ctxt *qctxt, int error)
1831 struct chk_dqblk *cdqb, *tmp;
1834 list_for_each_entry_safe(cdqb, tmp, &qctxt->qckt_list, dqb_list) {
1836 rc = commit_chkquot(sb, qctxt, cdqb);
1840 hlist_del_init(&cdqb->dqb_hash);
1841 list_del(&cdqb->dqb_list);
1848 static int fsfilt_ext3_quotacheck(struct super_block *sb,
1849 struct obd_quotactl *oqc)
1851 struct ext3_sb_info *sbi = EXT3_SB(sb);
1853 struct qchk_ctxt *qctxt;
1854 struct buffer_head *bitmap_bh = NULL;
1856 struct inode *inode;
1860 /* turn on quota and read dqinfo if existed */
1861 OBD_ALLOC_PTR(qctxt);
1863 oqc->qc_stat = -ENOMEM;
1867 for (i = 0; i < NR_DQHASH; i++)
1868 INIT_HLIST_HEAD(&qctxt->qckt_hash[i]);
1869 INIT_LIST_HEAD(&qctxt->qckt_list);
1871 for (i = 0; i < MAXQUOTAS; i++) {
1872 if (!Q_TYPESET(oqc, i))
1875 rc = quota_onoff(sb, Q_QUOTAON, i);
1876 if (!rc || rc == -EBUSY) {
1877 rc = read_old_dqinfo(sb, i, qctxt->qckt_dqinfo);
1880 } else if (rc == -ENOENT) {
1881 qctxt->qckt_first_check[i] = 1;
1887 /* check quota and update in hash */
1888 for (group = 0; group < sbi->s_groups_count; group++) {
1889 ino = group * sbi->s_inodes_per_group + 1;
1890 bitmap_bh = read_inode_bitmap(sb, group);
1892 CERROR("read_inode_bitmap group %d failed", group);
1893 GOTO(out, rc = -EIO);
1896 for (i = 0; i < sbi->s_inodes_per_group; i++, ino++) {
1897 if (ino < sbi->s_first_ino)
1900 inode = ext3_iget_inuse(sb, bitmap_bh, i, ino);
1901 rc = add_inode_quota(inode, qctxt, oqc);
1912 /* read old quota limits from old quota file. (only for the user
1913 * has limits but hasn't file) */
1914 #ifdef HAVE_QUOTA_SUPPORT
1915 for (i = 0; i < MAXQUOTAS; i++) {
1916 struct list_head id_list;
1917 struct dquot_id *dqid, *tmp;
1919 if (!Q_TYPESET(oqc, i))
1922 if (qctxt->qckt_first_check[i])
1926 LASSERT(sb_dqopt(sb)->files[i] != NULL);
1927 INIT_LIST_HEAD(&id_list);
1928 #ifndef KERNEL_SUPPORTS_QUOTA_READ
1929 rc = lustre_get_qids(sb_dqopt(sb)->files[i], NULL, i, &id_list);
1931 rc = lustre_get_qids(NULL, sb_dqopt(sb)->files[i], i, &id_list);
1934 CERROR("read old limits failed. (rc:%d)\n", rc);
1936 list_for_each_entry_safe(dqid, tmp, &id_list, di_link) {
1937 list_del_init(&dqid->di_link);
1940 cqget(sb, qctxt->qckt_hash, &qctxt->qckt_list,
1942 qctxt->qckt_first_check[i]);
1947 /* turn off quota cause we are to dump chk_dqblk to files */
1948 quota_onoff(sb, Q_QUOTAOFF, oqc->qc_type);
1950 rc = create_new_quota_files(qctxt, oqc);
1954 /* we use vfs functions to set dqblk, so turn quota on */
1955 rc = quota_onoff(sb, Q_QUOTAON, oqc->qc_type);
1957 /* dump and free chk_dqblk */
1958 rc = prune_chkquots(sb, qctxt, rc);
1959 OBD_FREE_PTR(qctxt);
1961 /* turn off quota, `lfs quotacheck` will turn on when all
1962 * nodes quotacheck finish. */
1963 quota_onoff(sb, Q_QUOTAOFF, oqc->qc_type);
1967 CERROR("quotacheck failed: rc = %d\n", rc);
1972 #ifdef HAVE_QUOTA_SUPPORT
1973 static int fsfilt_ext3_quotainfo(struct lustre_quota_info *lqi, int type,
1979 if (lqi->qi_files[type] == NULL) {
1980 CERROR("operate qinfo before it's enabled!\n");
1986 rc = lustre_check_quota_file(lqi, type);
1989 rc = lustre_read_quota_info(lqi, type);
1992 rc = lustre_write_quota_info(lqi, type);
1994 case QFILE_INIT_INFO:
1995 rc = lustre_init_quota_info(lqi, type);
1998 CERROR("Unsupported admin quota file cmd %d\n", cmd);
2005 static int fsfilt_ext3_qids(struct file *file, struct inode *inode, int type,
2006 struct list_head *list)
2008 return lustre_get_qids(file, inode, type, list);
2011 static int fsfilt_ext3_dquot(struct lustre_dquot *dquot, int cmd)
2016 if (dquot->dq_info->qi_files[dquot->dq_type] == NULL) {
2017 CERROR("operate dquot before it's enabled!\n");
2022 case QFILE_RD_DQUOT:
2023 rc = lustre_read_dquot(dquot);
2025 case QFILE_WR_DQUOT:
2026 if (dquot->dq_dqb.dqb_ihardlimit ||
2027 dquot->dq_dqb.dqb_isoftlimit ||
2028 dquot->dq_dqb.dqb_bhardlimit ||
2029 dquot->dq_dqb.dqb_bsoftlimit)
2030 clear_bit(DQ_FAKE_B, &dquot->dq_flags);
2032 set_bit(DQ_FAKE_B, &dquot->dq_flags);
2034 rc = lustre_commit_dquot(dquot);
2039 CERROR("Unsupported admin quota file cmd %d\n", cmd);
2047 lvfs_sbdev_type fsfilt_ext3_journal_sbdev(struct super_block *sb)
2049 return (EXT3_SB(sb)->journal_bdev);
2051 EXPORT_SYMBOL(fsfilt_ext3_journal_sbdev);
2053 static struct fsfilt_operations fsfilt_ext3_ops = {
2055 .fs_owner = THIS_MODULE,
2056 .fs_getlabel = fsfilt_ext3_get_label,
2057 .fs_setlabel = fsfilt_ext3_set_label,
2058 .fs_uuid = fsfilt_ext3_uuid,
2059 .fs_start = fsfilt_ext3_start,
2060 .fs_brw_start = fsfilt_ext3_brw_start,
2061 .fs_extend = fsfilt_ext3_extend,
2062 .fs_commit = fsfilt_ext3_commit,
2063 .fs_commit_async = fsfilt_ext3_commit_async,
2064 .fs_commit_wait = fsfilt_ext3_commit_wait,
2065 .fs_setattr = fsfilt_ext3_setattr,
2066 .fs_iocontrol = fsfilt_ext3_iocontrol,
2067 .fs_set_md = fsfilt_ext3_set_md,
2068 .fs_get_md = fsfilt_ext3_get_md,
2069 .fs_readpage = fsfilt_ext3_readpage,
2070 .fs_add_journal_cb = fsfilt_ext3_add_journal_cb,
2071 .fs_statfs = fsfilt_ext3_statfs,
2072 .fs_sync = fsfilt_ext3_sync,
2073 .fs_map_inode_pages = fsfilt_ext3_map_inode_pages,
2074 .fs_write_record = fsfilt_ext3_write_record,
2075 .fs_read_record = fsfilt_ext3_read_record,
2076 .fs_setup = fsfilt_ext3_setup,
2077 .fs_send_bio = fsfilt_ext3_send_bio,
2078 .fs_get_op_len = fsfilt_ext3_get_op_len,
2079 .fs_quotactl = fsfilt_ext3_quotactl,
2080 .fs_quotacheck = fsfilt_ext3_quotacheck,
2081 #ifdef HAVE_DISK_INODE_VERSION
2082 .fs_get_version = fsfilt_ext3_get_version,
2083 .fs_set_version = fsfilt_ext3_set_version,
2085 #ifdef HAVE_QUOTA_SUPPORT
2086 .fs_quotainfo = fsfilt_ext3_quotainfo,
2087 .fs_qids = fsfilt_ext3_qids,
2088 .fs_dquot = fsfilt_ext3_dquot,
2090 .fs_journal_sbdev = fsfilt_ext3_journal_sbdev,
2093 static int __init fsfilt_ext3_init(void)
2097 fcb_cache = cfs_mem_cache_create("fsfilt_ext3_fcb",
2098 sizeof(struct fsfilt_cb_data), 0, 0);
2100 CERROR("error allocating fsfilt journal callback cache\n");
2101 GOTO(out, rc = -ENOMEM);
2104 rc = fsfilt_register_ops(&fsfilt_ext3_ops);
2107 int err = cfs_mem_cache_destroy(fcb_cache);
2108 LASSERTF(err == 0, "error destroying new cache: rc %d\n", err);
2114 static void __exit fsfilt_ext3_exit(void)
2118 fsfilt_unregister_ops(&fsfilt_ext3_ops);
2119 rc = cfs_mem_cache_destroy(fcb_cache);
2120 LASSERTF(rc == 0, "couldn't destroy fcb_cache slab\n");
2123 module_init(fsfilt_ext3_init);
2124 module_exit(fsfilt_ext3_exit);
2126 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
2127 MODULE_DESCRIPTION("Lustre ext3 Filesystem Helper v0.1");
2128 MODULE_LICENSE("GPL");