1 This patch implements the large EA support in ext4. If the size of
2 an EA value is larger than the blocksize, then the EA value would
3 not be saved in the external EA block, instead it would be saved
4 in an external EA inode. So, the patch also helps support a larger
7 Index: linux-stage/fs/ext4/ext4.h
8 ===================================================================
9 --- linux-stage.orig/fs/ext4/ext4.h
10 +++ linux-stage/fs/ext4/ext4.h
11 @@ -1545,6 +1545,7 @@ static inline void ext4_clear_state_flag
12 EXT4_FEATURE_INCOMPAT_EXTENTS| \
13 EXT4_FEATURE_INCOMPAT_64BIT| \
14 EXT4_FEATURE_INCOMPAT_FLEX_BG| \
15 + EXT4_FEATURE_INCOMPAT_EA_INODE| \
16 EXT4_FEATURE_INCOMPAT_MMP | \
17 EXT4_FEATURE_INCOMPAT_DIRDATA| \
18 EXT4_FEATURE_INCOMPAT_INLINE_DATA)
19 @@ -1945,6 +1946,12 @@ struct mmpd_data {
20 #define EXT4_MMP_MAX_CHECK_INTERVAL 300UL
23 + * Maximum size of xattr attributes for FEATURE_INCOMPAT_EA_INODE 1MB
24 + * This limit is arbitrary, but is reasonable for the xattr API.
26 +#define EXT4_XATTR_MAX_LARGE_EA_SIZE (1024 * 1024)
32 @@ -1956,6 +1963,10 @@ struct mmpd_data {
33 # define ATTRIB_NORET __attribute__((noreturn))
34 # define NORET_AND noreturn,
36 +struct ext4_xattr_ino_array {
37 + unsigned int xia_count; /* # of used item in the array */
38 + unsigned int xia_inodes[0];
41 extern unsigned int ext4_count_free(char *bitmap, unsigned numchars);
42 void ext4_inode_bitmap_csum_set(struct super_block *sb, ext4_group_t group,
43 @@ -2169,6 +2180,7 @@ extern void ext4_set_inode_flags(struct
44 extern void ext4_get_inode_flags(struct ext4_inode_info *);
45 extern int ext4_alloc_da_blocks(struct inode *inode);
46 extern void ext4_set_aops(struct inode *inode);
47 +extern int ext4_meta_trans_blocks(struct inode *, int nrblocks, int chunk);
48 extern int ext4_writepage_trans_blocks(struct inode *);
49 extern int ext4_chunk_trans_blocks(struct inode *, int nrblocks);
50 extern int ext4_block_truncate_page(handle_t *handle,
51 Index: linux-stage/fs/ext4/inode.c
52 ===================================================================
53 --- linux-stage.orig/fs/ext4/inode.c
54 +++ linux-stage/fs/ext4/inode.c
55 @@ -135,8 +135,6 @@ static void ext4_invalidatepage(struct p
57 static int __ext4_journalled_writepage(struct page *page, unsigned int len);
58 static int ext4_bh_delay_or_unwritten(handle_t *handle, struct buffer_head *bh);
59 -static int ext4_meta_trans_blocks(struct inode *inode, int lblocks,
63 * Test whether an inode is a fast symlink.
64 @@ -182,6 +180,8 @@ void ext4_evict_inode(struct inode *inod
68 + int extra_credits = 3;
69 + struct ext4_xattr_ino_array *lea_ino_array = NULL;
71 trace_ext4_evict_inode(inode);
73 @@ -235,8 +235,8 @@ void ext4_evict_inode(struct inode *inod
74 * protection against it
76 sb_start_intwrite(inode->i_sb);
77 - handle = ext4_journal_start(inode, EXT4_HT_TRUNCATE,
78 - ext4_blocks_for_truncate(inode)+3);
80 + handle = ext4_journal_start(inode, EXT4_HT_TRUNCATE, extra_credits);
82 ext4_std_error(inode->i_sb, PTR_ERR(handle));
84 @@ -251,6 +251,32 @@ void ext4_evict_inode(struct inode *inod
87 ext4_handle_sync(handle);
89 + /* Delete xattr inode before deleting the main inode. */
90 + err = ext4_xattr_delete_inode(handle, inode, &lea_ino_array);
92 + ext4_warning(inode->i_sb,
93 + "couldn't delete inode's xattr (err %d)", err);
97 + if (!IS_NOQUOTA(inode))
98 + extra_credits += 2 * EXT4_QUOTA_DEL_BLOCKS(inode->i_sb);
100 + if (!ext4_handle_has_enough_credits(handle,
101 + ext4_blocks_for_truncate(inode) + extra_credits)) {
102 + err = ext4_journal_extend(handle,
103 + ext4_blocks_for_truncate(inode) + extra_credits);
105 + err = ext4_journal_restart(handle,
106 + ext4_blocks_for_truncate(inode) + extra_credits);
108 + ext4_warning(inode->i_sb,
109 + "couldn't extend journal (err %d)", err);
115 err = ext4_mark_inode_dirty(handle, inode);
117 @@ -307,6 +334,9 @@ void ext4_evict_inode(struct inode *inod
118 ext4_free_inode(handle, inode);
119 ext4_journal_stop(handle);
120 sb_end_intwrite(inode->i_sb);
122 + if (lea_ino_array != NULL)
123 + ext4_xattr_inode_array_free(inode, lea_ino_array);
126 ext4_clear_inode(inode); /* We must guarantee clearing of inode... */
127 @@ -4777,7 +4807,7 @@ static int ext4_index_trans_blocks(struc
129 * Also account for superblock, inode, quota and xattr blocks
131 -static int ext4_meta_trans_blocks(struct inode *inode, int lblocks,
132 +int ext4_meta_trans_blocks(struct inode *inode, int lblocks,
135 ext4_group_t groups, ngroups = ext4_get_groups_count(inode->i_sb);
136 Index: linux-stage/fs/ext4/xattr.c
137 ===================================================================
138 --- linux-stage.orig/fs/ext4/xattr.c
139 +++ linux-stage/fs/ext4/xattr.c
140 @@ -233,19 +233,26 @@ ext4_xattr_check_block(struct inode *ino
144 -ext4_xattr_check_entry(struct ext4_xattr_entry *entry, size_t size)
145 +ext4_xattr_check_entry(struct ext4_xattr_entry *entry, size_t size,
146 + struct inode *inode)
148 size_t value_size = le32_to_cpu(entry->e_value_size);
150 - if (entry->e_value_block != 0 || value_size > size ||
151 + if (!entry->e_value_inum &&
152 le16_to_cpu(entry->e_value_offs) + value_size > size)
154 + if (entry->e_value_inum &&
155 + (le32_to_cpu(entry->e_value_inum) < EXT4_FIRST_INO(inode->i_sb) ||
156 + le32_to_cpu(entry->e_value_inum) >
157 + le32_to_cpu(EXT4_SB(inode->i_sb)->s_es->s_inodes_count)))
163 ext4_xattr_find_entry(struct ext4_xattr_entry **pentry, int name_index,
164 - const char *name, size_t size, int sorted)
165 + const char *name, size_t size, int sorted,
166 + struct inode *inode)
168 struct ext4_xattr_entry *entry;
170 @@ -265,11 +272,109 @@ ext4_xattr_find_entry(struct ext4_xattr_
174 - if (!cmp && ext4_xattr_check_entry(entry, size))
175 + if (!cmp && ext4_xattr_check_entry(entry, size, inode))
177 return cmp ? -ENODATA : 0;
181 + * Read the EA value from an inode.
183 +static int ext4_xattr_inode_read(struct inode *ea_inode, void *buf, size_t *size)
185 + unsigned long block = 0;
186 + struct buffer_head *bh = NULL;
187 + int err, blocksize;
188 + size_t csize, ret_size = 0;
193 + blocksize = ea_inode->i_sb->s_blocksize;
195 + while (ret_size < *size) {
196 + csize = (*size - ret_size) > blocksize ? blocksize :
198 + bh = ext4_bread(NULL, ea_inode, block, 0, &err);
203 + memcpy(buf, bh->b_data, csize);
217 + * Fetch the xattr inode from disk.
219 + * The xattr inode stores the parent inode number and generation so that
220 + * the kernel and e2fsck can verify the xattr inode is valid upon access.
222 +struct inode *ext4_xattr_inode_iget(struct inode *parent,
223 + unsigned long ea_ino, int *err)
225 + struct inode *ea_inode = NULL;
227 + ea_inode = ext4_iget(parent->i_sb, ea_ino);
228 + if (IS_ERR(ea_inode) || is_bad_inode(ea_inode)) {
229 + int rc = IS_ERR(ea_inode) ? PTR_ERR(ea_inode) : 0;
230 + ext4_error(parent->i_sb, "error while reading EA inode %lu "
231 + "/ %d %d", ea_ino, rc, is_bad_inode(ea_inode));
232 + *err = rc != 0 ? rc : -EIO;
236 + if (EXT4_XATTR_INODE_GET_PARENT(ea_inode) != parent->i_ino ||
237 + ea_inode->i_generation != parent->i_generation) {
238 + ext4_error(parent->i_sb, "Backpointer from EA inode %lu "
239 + "to parent invalid.", ea_ino);
244 + if (!(EXT4_I(ea_inode)->i_flags & EXT4_EA_INODE_FL)) {
245 + ext4_error(parent->i_sb, "EA inode %lu does not have "
246 + "EXT4_EA_INODE_FL flag set.\n", ea_ino);
260 + * Read the value from the EA inode.
262 +static int ext4_xattr_inode_get(struct inode *inode, unsigned long ea_ino,
263 + void *buffer, size_t *size)
265 + struct inode *ea_inode = NULL;
268 + ea_inode = ext4_xattr_inode_iget(inode, ea_ino, &err);
272 + err = ext4_xattr_inode_read(ea_inode, buffer, size);
279 ext4_xattr_block_get(struct inode *inode, int name_index, const char *name,
280 void *buffer, size_t buffer_size)
281 @@ -301,7 +400,8 @@ bad_block:
283 ext4_xattr_cache_insert(bh);
285 - error = ext4_xattr_find_entry(&entry, name_index, name, bh->b_size, 1);
286 + error = ext4_xattr_find_entry(&entry, name_index, name, bh->b_size, 1,
291 @@ -311,8 +411,16 @@ bad_block:
293 if (size > buffer_size)
295 - memcpy(buffer, bh->b_data + le16_to_cpu(entry->e_value_offs),
297 + if (entry->e_value_inum) {
298 + error = ext4_xattr_inode_get(inode,
299 + le32_to_cpu(entry->e_value_inum),
304 + memcpy(buffer, bh->b_data +
305 + le16_to_cpu(entry->e_value_offs), size);
310 @@ -346,7 +454,7 @@ ext4_xattr_ibody_get(struct inode *inode
313 error = ext4_xattr_find_entry(&entry, name_index, name,
314 - end - (void *)entry, 0);
315 + end - (void *)entry, 0, inode);
318 size = le32_to_cpu(entry->e_value_size);
319 @@ -354,8 +462,16 @@ ext4_xattr_ibody_get(struct inode *inode
321 if (size > buffer_size)
323 - memcpy(buffer, (void *)IFIRST(header) +
324 - le16_to_cpu(entry->e_value_offs), size);
325 + if (entry->e_value_inum) {
326 + error = ext4_xattr_inode_get(inode,
327 + le32_to_cpu(entry->e_value_inum),
332 + memcpy(buffer, (void *)IFIRST(header) +
333 + le16_to_cpu(entry->e_value_offs), size);
338 @@ -597,7 +713,7 @@ static size_t ext4_xattr_free_space(stru
340 for (; !IS_LAST_ENTRY(last); last = EXT4_XATTR_NEXT(last)) {
341 *total += EXT4_XATTR_LEN(last->e_name_len);
342 - if (!last->e_value_block && last->e_value_size) {
343 + if (!last->e_value_inum && last->e_value_size) {
344 size_t offs = le16_to_cpu(last->e_value_offs);
345 if (offs < *min_offs)
347 @@ -606,16 +722,172 @@ static size_t ext4_xattr_free_space(stru
348 return (*min_offs - ((void *)last - base) - sizeof(__u32));
352 + * Write the value of the EA in an inode.
355 -ext4_xattr_set_entry(struct ext4_xattr_info *i, struct ext4_xattr_search *s)
356 +ext4_xattr_inode_write(handle_t *handle, struct inode *ea_inode,
357 + const void *buf, int bufsize)
359 + struct buffer_head *bh = NULL;
360 + unsigned long block = 0;
361 + unsigned blocksize = ea_inode->i_sb->s_blocksize;
362 + unsigned max_blocks = (bufsize + blocksize - 1) >> ea_inode->i_blkbits;
363 + int csize, wsize = 0;
368 + while (ret >= 0 && ret < max_blocks) {
369 + struct ext4_map_blocks map;
370 + map.m_lblk = block += ret;
371 + map.m_len = max_blocks -= ret;
373 + ret = ext4_map_blocks(handle, ea_inode, &map,
374 + EXT4_GET_BLOCKS_CREATE);
376 + ext4_mark_inode_dirty(handle, ea_inode);
377 + if (ret == -ENOSPC &&
378 + ext4_should_retry_alloc(ea_inode->i_sb, &retries)) {
390 + while (wsize < bufsize) {
393 + csize = (bufsize - wsize) > blocksize ? blocksize :
395 + bh = ext4_getblk(handle, ea_inode, block, 0, &ret);
398 + ret = ext4_journal_get_write_access(handle, bh);
402 + memcpy(bh->b_data, buf, csize);
403 + set_buffer_uptodate(bh);
404 + ext4_handle_dirty_metadata(handle, ea_inode, bh);
411 + i_size_write(ea_inode, wsize);
412 + ext4_update_i_disksize(ea_inode, wsize);
414 + ext4_mark_inode_dirty(handle, ea_inode);
423 + * Create an inode to store the value of a large EA.
425 +static struct inode *
426 +ext4_xattr_inode_create(handle_t *handle, struct inode *inode)
428 + struct inode *ea_inode = NULL;
431 + * Let the next inode be the goal, so we try and allocate the EA inode
432 + * in the same group, or nearby one.
434 + ea_inode = ext4_new_inode(handle, inode->i_sb->s_root->d_inode,
435 + S_IFREG|0600, NULL, inode->i_ino + 1, NULL);
437 + if (!IS_ERR(ea_inode)) {
438 + ea_inode->i_op = &ext4_file_inode_operations;
439 + ea_inode->i_fop = &ext4_file_operations;
440 + ext4_set_aops(ea_inode);
441 + ea_inode->i_generation = inode->i_generation;
442 + EXT4_I(ea_inode)->i_flags |= EXT4_EA_INODE_FL;
445 + * A back-pointer from EA inode to parent inode will be useful
448 + EXT4_XATTR_INODE_SET_PARENT(ea_inode, inode->i_ino);
449 + unlock_new_inode(ea_inode);
456 + * Unlink the inode storing the value of the EA.
459 +ext4_xattr_inode_unlink(struct inode *inode, unsigned long ea_ino)
461 + struct inode *ea_inode = NULL;
464 + ea_inode = ext4_xattr_inode_iget(inode, ea_ino, &err);
468 + clear_nlink(ea_inode);
475 + * Add value of the EA in an inode.
478 +ext4_xattr_inode_set(handle_t *handle, struct inode *inode, unsigned long *ea_ino,
479 + const void *value, size_t value_len)
481 + struct inode *ea_inode = NULL;
484 + /* Create an inode for the EA value */
485 + ea_inode = ext4_xattr_inode_create(handle, inode);
486 + if (IS_ERR(ea_inode))
489 + err = ext4_xattr_inode_write(handle, ea_inode, value, value_len);
491 + clear_nlink(ea_inode);
493 + *ea_ino = ea_inode->i_ino;
501 +ext4_xattr_set_entry(struct ext4_xattr_info *i, struct ext4_xattr_search *s,
502 + handle_t *handle, struct inode *inode)
504 struct ext4_xattr_entry *last;
505 size_t free, min_offs = s->end - s->base, name_len = strlen(i->name);
506 + int in_inode = i->in_inode;
508 + if (EXT4_HAS_INCOMPAT_FEATURE(inode->i_sb,
509 + EXT4_FEATURE_INCOMPAT_EA_INODE) &&
510 + (EXT4_XATTR_SIZE(i->value_len) >
511 + EXT4_XATTR_MIN_LARGE_EA_SIZE(inode->i_sb->s_blocksize)))
514 /* Compute min_offs and last. */
516 for (; !IS_LAST_ENTRY(last); last = EXT4_XATTR_NEXT(last)) {
517 - if (!last->e_value_block && last->e_value_size) {
518 + if (!last->e_value_inum && last->e_value_size) {
519 size_t offs = le16_to_cpu(last->e_value_offs);
522 @@ -623,16 +895,21 @@ ext4_xattr_set_entry(struct ext4_xattr_i
524 free = min_offs - ((void *)last - s->base) - sizeof(__u32);
526 - if (!s->here->e_value_block && s->here->e_value_size) {
528 + !s->here->e_value_inum && s->here->e_value_size) {
529 size_t size = le32_to_cpu(s->here->e_value_size);
530 free += EXT4_XATTR_SIZE(size);
532 free += EXT4_XATTR_LEN(name_len);
535 - if (free < EXT4_XATTR_SIZE(i->value_len) ||
536 - free < EXT4_XATTR_LEN(name_len) +
537 - EXT4_XATTR_SIZE(i->value_len))
538 + size_t value_len = EXT4_XATTR_SIZE(i->value_len);
543 + if (free < value_len ||
544 + free < EXT4_XATTR_LEN(name_len) + value_len)
548 @@ -646,7 +923,8 @@ ext4_xattr_set_entry(struct ext4_xattr_i
549 s->here->e_name_len = name_len;
550 memcpy(s->here->e_name, i->name, name_len);
552 - if (!s->here->e_value_block && s->here->e_value_size) {
553 + if (!s->here->e_value_inum && s->here->e_value_size &&
554 + s->here->e_value_offs > 0) {
555 void *first_val = s->base + min_offs;
556 size_t offs = le16_to_cpu(s->here->e_value_offs);
557 void *val = s->base + offs;
558 @@ -680,13 +958,18 @@ ext4_xattr_set_entry(struct ext4_xattr_i
560 while (!IS_LAST_ENTRY(last)) {
561 size_t o = le16_to_cpu(last->e_value_offs);
562 - if (!last->e_value_block &&
563 + if (!last->e_value_inum &&
564 last->e_value_size && o < offs)
566 cpu_to_le16(o + size);
567 last = EXT4_XATTR_NEXT(last);
570 + if (s->here->e_value_inum) {
571 + ext4_xattr_inode_unlink(inode,
572 + le32_to_cpu(s->here->e_value_inum));
573 + s->here->e_value_inum = 0;
576 /* Remove the old name. */
577 size_t size = EXT4_XATTR_LEN(name_len);
578 @@ -700,10 +982,17 @@ ext4_xattr_set_entry(struct ext4_xattr_i
580 /* Insert the new value. */
581 s->here->e_value_size = cpu_to_le32(i->value_len);
582 - if (i->value_len) {
584 + unsigned long ea_ino = le32_to_cpu(s->here->e_value_inum);
585 + ext4_xattr_inode_set(handle, inode, &ea_ino, i->value,
587 + s->here->e_value_inum = cpu_to_le32(ea_ino);
588 + s->here->e_value_offs = 0;
589 + } else if (i->value_len) {
590 size_t size = EXT4_XATTR_SIZE(i->value_len);
591 void *val = s->base + min_offs - size;
592 s->here->e_value_offs = cpu_to_le16(min_offs - size);
593 + s->here->e_value_inum = 0;
594 if (i->value == EXT4_ZERO_XATTR_VALUE) {
595 memset(val, 0, size);
597 @@ -753,7 +1042,7 @@ ext4_xattr_block_find(struct inode *inod
598 bs->s.end = bs->bh->b_data + bs->bh->b_size;
599 bs->s.here = bs->s.first;
600 error = ext4_xattr_find_entry(&bs->s.here, i->name_index,
601 - i->name, bs->bh->b_size, 1);
602 + i->name, bs->bh->b_size, 1, inode);
603 if (error && error != -ENODATA)
605 bs->s.not_found = error;
606 @@ -777,8 +1066,6 @@ ext4_xattr_block_set(handle_t *handle, s
608 #define header(x) ((struct ext4_xattr_header *)(x))
610 - if (i->value && i->value_len > sb->s_blocksize)
613 ce = mb_cache_entry_get(ext4_xattr_cache, bs->bh->b_bdev,
615 @@ -794,7 +1081,7 @@ ext4_xattr_block_set(handle_t *handle, s
618 ea_bdebug(bs->bh, "modifying in-place");
619 - error = ext4_xattr_set_entry(i, s);
620 + error = ext4_xattr_set_entry(i, s, handle, inode);
622 if (!IS_LAST_ENTRY(s->first))
623 ext4_xattr_rehash(header(s->base),
624 @@ -845,7 +1132,7 @@ ext4_xattr_block_set(handle_t *handle, s
625 s->end = s->base + sb->s_blocksize;
628 - error = ext4_xattr_set_entry(i, s);
629 + error = ext4_xattr_set_entry(i, s, handle, inode);
633 @@ -994,7 +1281,7 @@ int ext4_xattr_ibody_find(struct inode *
634 /* Find the named attribute. */
635 error = ext4_xattr_find_entry(&is->s.here, i->name_index,
637 - (void *)is->s.base, 0);
638 + (void *)is->s.base, 0, inode);
639 if (error && error != -ENODATA)
641 is->s.not_found = error;
642 @@ -1012,7 +1299,7 @@ int ext4_xattr_ibody_inline_set(handle_t
644 if (EXT4_I(inode)->i_extra_isize == 0)
646 - error = ext4_xattr_set_entry(i, s);
647 + error = ext4_xattr_set_entry(i, s, handle, inode);
649 if (error == -ENOSPC &&
650 ext4_has_inline_data(inode)) {
651 @@ -1024,7 +1311,7 @@ int ext4_xattr_ibody_inline_set(handle_t
652 error = ext4_xattr_ibody_find(inode, i, is);
655 - error = ext4_xattr_set_entry(i, s);
656 + error = ext4_xattr_set_entry(i, s, handle, inode);
660 @@ -1050,7 +1337,7 @@ static int ext4_xattr_ibody_set(handle_t
662 if (EXT4_I(inode)->i_extra_isize == 0)
664 - error = ext4_xattr_set_entry(i, s);
665 + error = ext4_xattr_set_entry(i, s, handle, inode);
668 header = IHDR(inode, ext4_raw_inode(&is->iloc));
669 @@ -1086,7 +1373,7 @@ ext4_xattr_set_handle(handle_t *handle,
672 .value_len = value_len,
676 struct ext4_xattr_ibody_find is = {
677 .s = { .not_found = -ENODATA, },
678 @@ -1151,6 +1438,15 @@ ext4_xattr_set_handle(handle_t *handle,
681 error = ext4_xattr_block_set(handle, inode, &i, &bs);
682 + if (EXT4_HAS_INCOMPAT_FEATURE(inode->i_sb,
683 + EXT4_FEATURE_INCOMPAT_EA_INODE) &&
684 + error == -ENOSPC) {
685 + /* xattr not fit to block, store at external
688 + error = ext4_xattr_ibody_set(handle, inode,
693 if (!is.s.not_found) {
694 @@ -1197,9 +1493,22 @@ ext4_xattr_set(struct inode *inode, int
695 const void *value, size_t value_len, int flags)
698 + struct super_block *sb = inode->i_sb;
699 int error, retries = 0;
700 int credits = ext4_jbd2_credits_xattr(inode);
702 + if ((value_len >= EXT4_XATTR_MIN_LARGE_EA_SIZE(sb->s_blocksize)) &&
703 + EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EA_INODE)) {
704 + int nrblocks = (value_len + sb->s_blocksize - 1) >>
705 + sb->s_blocksize_bits;
707 + /* For new inode */
708 + credits += EXT4_SINGLEDATA_TRANS_BLOCKS(sb) + 3;
710 + /* For data blocks of EA inode */
711 + credits += ext4_meta_trans_blocks(inode, nrblocks, 0);
715 handle = ext4_journal_start(inode, EXT4_HT_XATTR, credits);
716 if (IS_ERR(handle)) {
717 @@ -1211,7 +1520,7 @@ retry:
718 value, value_len, flags);
719 error2 = ext4_journal_stop(handle);
720 if (error == -ENOSPC &&
721 - ext4_should_retry_alloc(inode->i_sb, &retries))
722 + ext4_should_retry_alloc(sb, &retries))
726 @@ -1233,7 +1542,7 @@ static void ext4_xattr_shift_entries(str
728 /* Adjust the value offsets of the entries */
729 for (; !IS_LAST_ENTRY(last); last = EXT4_XATTR_NEXT(last)) {
730 - if (!last->e_value_block && last->e_value_size) {
731 + if (!last->e_value_inum && last->e_value_size) {
732 new_offs = le16_to_cpu(last->e_value_offs) +
734 BUG_ON(new_offs + le32_to_cpu(last->e_value_size)
735 @@ -1472,21 +1781,135 @@ cleanup:
739 +#define EIA_INCR 16 /* must be 2^n */
740 +#define EIA_MASK (EIA_INCR - 1)
741 +/* Add the large xattr @ino into @lea_ino_array for later deletion.
742 + * If @lea_ino_array is new or full it will be grown and the old
743 + * contents copied over.
746 +ext4_expand_ino_array(struct ext4_xattr_ino_array **lea_ino_array, __u32 ino)
748 + if (*lea_ino_array == NULL) {
750 + * Start with 15 inodes, so it fits into a power-of-two size.
751 + * If *lea_ino_array is NULL, this is essentially offsetof()
754 + kmalloc(offsetof(struct ext4_xattr_ino_array,
755 + xia_inodes[EIA_MASK]),
757 + if (*lea_ino_array == NULL)
759 + (*lea_ino_array)->xia_count = 0;
760 + } else if (((*lea_ino_array)->xia_count & EIA_MASK) == EIA_MASK) {
761 + /* expand the array once all 15 + n * 16 slots are full */
762 + struct ext4_xattr_ino_array *new_array = NULL;
763 + int count = (*lea_ino_array)->xia_count;
765 + /* if new_array is NULL, this is essentially offsetof() */
766 + new_array = kmalloc(
767 + offsetof(struct ext4_xattr_ino_array,
768 + xia_inodes[count + EIA_INCR]),
770 + if (new_array == NULL)
772 + memcpy(new_array, *lea_ino_array,
773 + offsetof(struct ext4_xattr_ino_array,
774 + xia_inodes[count]));
775 + kfree(*lea_ino_array);
776 + *lea_ino_array = new_array;
778 + (*lea_ino_array)->xia_inodes[(*lea_ino_array)->xia_count++] = ino;
783 + * Add xattr inode to orphan list
786 +ext4_xattr_inode_orphan_add(handle_t *handle, struct inode *inode,
787 + int credits, struct ext4_xattr_ino_array *lea_ino_array)
789 + struct inode *ea_inode = NULL;
790 + int idx = 0, error = 0;
792 + if (lea_ino_array == NULL)
795 + for (; idx < lea_ino_array->xia_count; ++idx) {
796 + if (!ext4_handle_has_enough_credits(handle, credits)) {
797 + error = ext4_journal_extend(handle, credits);
799 + error = ext4_journal_restart(handle, credits);
802 + ext4_warning(inode->i_sb,
803 + "couldn't extend journal "
804 + "(err %d)", error);
808 + ea_inode = ext4_xattr_inode_iget(inode,
809 + lea_ino_array->xia_inodes[idx], &error);
812 + ext4_orphan_add(handle, ea_inode);
813 + /* the inode's i_count will be released by caller */
820 * ext4_xattr_delete_inode()
822 - * Free extended attribute resources associated with this inode. This
823 + * Free extended attribute resources associated with this inode. Traverse
824 + * all entries and unlink any xattr inodes associated with this inode. This
825 * is called immediately before an inode is freed. We have exclusive
826 - * access to the inode.
827 + * access to the inode. If an orphan inode is deleted it will also delete any
828 + * xattr block and all xattr inodes. They are checked by ext4_xattr_inode_iget()
829 + * to ensure they belong to the parent inode and were not deleted already.
832 -ext4_xattr_delete_inode(handle_t *handle, struct inode *inode)
834 +ext4_xattr_delete_inode(handle_t *handle, struct inode *inode,
835 + struct ext4_xattr_ino_array **lea_ino_array)
837 struct buffer_head *bh = NULL;
838 + struct ext4_xattr_ibody_header *header;
839 + struct ext4_inode *raw_inode;
840 + struct ext4_iloc iloc;
841 + struct ext4_xattr_entry *entry;
842 + int credits = 3, error = 0;
844 - if (!EXT4_I(inode)->i_file_acl)
845 + if (!ext4_test_inode_state(inode, EXT4_STATE_XATTR))
846 + goto delete_external_ea;
848 + error = ext4_get_inode_loc(inode, &iloc);
851 + raw_inode = ext4_raw_inode(&iloc);
852 + header = IHDR(inode, raw_inode);
853 + for (entry = IFIRST(header); !IS_LAST_ENTRY(entry);
854 + entry = EXT4_XATTR_NEXT(entry)) {
855 + if (!entry->e_value_inum)
857 + if (ext4_expand_ino_array(lea_ino_array,
858 + entry->e_value_inum) != 0) {
862 + entry->e_value_inum = 0;
867 + if (!EXT4_I(inode)->i_file_acl) {
868 + /* add xattr inode to orphan list */
869 + ext4_xattr_inode_orphan_add(handle, inode, credits,
873 bh = sb_bread(inode->i_sb, EXT4_I(inode)->i_file_acl);
875 EXT4_ERROR_INODE(inode, "block %llu read error",
876 @@ -1499,11 +1922,69 @@ ext4_xattr_delete_inode(handle_t *handle
877 EXT4_I(inode)->i_file_acl);
881 + for (entry = BFIRST(bh); !IS_LAST_ENTRY(entry);
882 + entry = EXT4_XATTR_NEXT(entry)) {
883 + if (!entry->e_value_inum)
885 + if (ext4_expand_ino_array(lea_ino_array,
886 + entry->e_value_inum) != 0)
888 + entry->e_value_inum = 0;
891 + /* add xattr inode to orphan list */
892 + error = ext4_xattr_inode_orphan_add(handle, inode, credits,
897 + if (!IS_NOQUOTA(inode))
898 + credits += 2 * EXT4_QUOTA_DEL_BLOCKS(inode->i_sb);
900 + if (!ext4_handle_has_enough_credits(handle, credits)) {
901 + error = ext4_journal_extend(handle, credits);
903 + error = ext4_journal_restart(handle, credits);
905 + ext4_warning(inode->i_sb,
906 + "couldn't extend journal (err %d)", error);
911 ext4_xattr_release_block(handle, inode, bh);
912 EXT4_I(inode)->i_file_acl = 0;
921 +ext4_xattr_inode_array_free(struct inode *inode,
922 + struct ext4_xattr_ino_array *lea_ino_array)
924 + struct inode *ea_inode = NULL;
928 + if (lea_ino_array == NULL)
931 + for (; idx < lea_ino_array->xia_count; ++idx) {
932 + ea_inode = ext4_xattr_inode_iget(inode,
933 + lea_ino_array->xia_inodes[idx], &err);
936 + /* for inode's i_count get from ext4_xattr_delete_inode */
937 + if (!list_empty(&EXT4_I(ea_inode)->i_orphan))
939 + clear_nlink(ea_inode);
942 + kfree(lea_ino_array);
946 @@ -1573,10 +2054,9 @@ ext4_xattr_cmp(struct ext4_xattr_header
947 entry1->e_name_index != entry2->e_name_index ||
948 entry1->e_name_len != entry2->e_name_len ||
949 entry1->e_value_size != entry2->e_value_size ||
950 + entry1->e_value_inum != entry2->e_value_inum ||
951 memcmp(entry1->e_name, entry2->e_name, entry1->e_name_len))
953 - if (entry1->e_value_block != 0 || entry2->e_value_block != 0)
955 if (memcmp((char *)header1 + le16_to_cpu(entry1->e_value_offs),
956 (char *)header2 + le16_to_cpu(entry2->e_value_offs),
957 le32_to_cpu(entry1->e_value_size)))
958 @@ -1660,7 +2140,7 @@ static inline void ext4_xattr_hash_entry
962 - if (entry->e_value_block == 0 && entry->e_value_size != 0) {
963 + if (!entry->e_value_inum && entry->e_value_size) {
964 __le32 *value = (__le32 *)((char *)header +
965 le16_to_cpu(entry->e_value_offs));
966 for (n = (le32_to_cpu(entry->e_value_size) +
967 Index: linux-stage/fs/ext4/xattr.h
968 ===================================================================
969 --- linux-stage.orig/fs/ext4/xattr.h
970 +++ linux-stage/fs/ext4/xattr.h
971 @@ -42,7 +42,7 @@ struct ext4_xattr_entry {
972 __u8 e_name_len; /* length of name */
973 __u8 e_name_index; /* attribute name index */
974 __le16 e_value_offs; /* offset in disk block of value */
975 - __le32 e_value_block; /* disk block attribute is stored on (n/i) */
976 + __le32 e_value_inum; /* inode in which the value is stored */
977 __le32 e_value_size; /* size of attribute value */
978 __le32 e_hash; /* hash value of name and value */
979 char e_name[0]; /* attribute name */
980 @@ -67,6 +67,26 @@ struct ext4_xattr_entry {
981 EXT4_I(inode)->i_extra_isize))
982 #define IFIRST(hdr) ((struct ext4_xattr_entry *)((hdr)+1))
985 + * Link EA inode back to parent one using i_mtime field.
986 + * Extra integer type conversion added to ignore higher
987 + * bits in i_mtime.tv_sec which might be set by ext4_get()
989 +#define EXT4_XATTR_INODE_SET_PARENT(inode, inum) \
991 + (inode)->i_mtime.tv_sec = inum; \
994 +#define EXT4_XATTR_INODE_GET_PARENT(inode) \
995 + ((__u32)(inode)->i_mtime.tv_sec)
998 + * The minimum size of EA value when you start storing it in an external inode
999 + * size of block - size of header - size of 1 entry - 4 null bytes
1001 +#define EXT4_XATTR_MIN_LARGE_EA_SIZE(b) \
1002 + ((b) - EXT4_XATTR_LEN(3) - sizeof(struct ext4_xattr_header) - 4)
1004 #define BHDR(bh) ((struct ext4_xattr_header *)((bh)->b_data))
1005 #define ENTRY(ptr) ((struct ext4_xattr_entry *)(ptr))
1006 #define BFIRST(bh) ENTRY(BHDR(bh)+1)
1007 @@ -75,10 +84,11 @@ struct ext4_xattr_entry {
1008 #define EXT4_ZERO_XATTR_VALUE ((void *)-1)
1010 struct ext4_xattr_info {
1019 struct ext4_xattr_search {
1020 @@ -106,7 +116,13 @@ extern int ext4_xattr_get(struct inode *
1021 extern int ext4_xattr_set(struct inode *, int, const char *, const void *, size_t, int);
1022 extern int ext4_xattr_set_handle(handle_t *, struct inode *, int, const char *, const void *, size_t, int);
1024 -extern void ext4_xattr_delete_inode(handle_t *, struct inode *);
1025 +extern struct inode *ext4_xattr_inode_iget(struct inode *parent, unsigned long ea_ino,
1027 +extern int ext4_xattr_inode_unlink(struct inode *inode, unsigned long ea_ino);
1028 +extern int ext4_xattr_delete_inode(handle_t *handle, struct inode *inode,
1029 + struct ext4_xattr_ino_array **array);
1030 +extern void ext4_xattr_inode_array_free(struct inode *inode,
1031 + struct ext4_xattr_ino_array *array);
1032 extern void ext4_xattr_put_super(struct super_block *);
1034 extern int ext4_expand_extra_isize_ea(struct inode *inode, int new_extra_isize,
1035 Index: linux-stage/fs/ext4/ialloc.c
1036 ===================================================================
1037 --- linux-stage.orig/fs/ext4/ialloc.c
1038 +++ linux-stage/fs/ext4/ialloc.c
1039 @@ -252,7 +252,6 @@ void ext4_free_inode(handle_t *handle, s
1040 * as writing the quota to disk may need the lock as well.
1042 dquot_initialize(inode);
1043 - ext4_xattr_delete_inode(handle, inode);
1044 dquot_free_inode(inode);
1047 Index: linux-stage/fs/ext4/inline.c
1048 ===================================================================
1049 --- linux-stage.orig/fs/ext4/inline.c
1050 +++ linux-stage/fs/ext4/inline.c
1051 @@ -59,7 +59,7 @@ static int get_max_inline_xattr_value_si
1053 /* Compute min_offs. */
1054 for (; !IS_LAST_ENTRY(entry); entry = EXT4_XATTR_NEXT(entry)) {
1055 - if (!entry->e_value_block && entry->e_value_size) {
1056 + if (!entry->e_value_inum && entry->e_value_size) {
1057 size_t offs = le16_to_cpu(entry->e_value_offs);
1058 if (offs < min_offs)