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Diffstat (limited to 'fs/ext4/resize.c')
-rw-r--r--fs/ext4/resize.c49
1 files changed, 8 insertions, 41 deletions
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index 526db73701b..92034d2c8a7 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -748,6 +748,7 @@ int ext4_group_add(struct super_block *sb, struct ext4_new_group_data *input)
struct inode *inode = NULL;
handle_t *handle;
int gdb_off, gdb_num;
+ int num_grp_locked = 0;
int err, err2;
gdb_num = input->group / EXT4_DESC_PER_BLOCK(sb);
@@ -788,6 +789,7 @@ int ext4_group_add(struct super_block *sb, struct ext4_new_group_data *input)
}
}
+
if ((err = verify_group_input(sb, input)))
goto exit_put;
@@ -856,6 +858,7 @@ int ext4_group_add(struct super_block *sb, struct ext4_new_group_data *input)
* using the new disk blocks.
*/
+ num_grp_locked = ext4_mb_get_buddy_cache_lock(sb, input->group);
/* Update group descriptor block for new group */
gdp = (struct ext4_group_desc *)((char *)primary->b_data +
gdb_off * EXT4_DESC_SIZE(sb));
@@ -872,9 +875,11 @@ int ext4_group_add(struct super_block *sb, struct ext4_new_group_data *input)
* We can allocate memory for mb_alloc based on the new group
* descriptor
*/
- err = ext4_mb_add_more_groupinfo(sb, input->group, gdp);
- if (err)
+ err = ext4_mb_add_groupinfo(sb, input->group, gdp);
+ if (err) {
+ ext4_mb_put_buddy_cache_lock(sb, input->group, num_grp_locked);
goto exit_journal;
+ }
/*
* Make the new blocks and inodes valid next. We do this before
@@ -916,6 +921,7 @@ int ext4_group_add(struct super_block *sb, struct ext4_new_group_data *input)
/* Update the global fs size fields */
sbi->s_groups_count++;
+ ext4_mb_put_buddy_cache_lock(sb, input->group, num_grp_locked);
ext4_handle_dirty_metadata(handle, NULL, primary);
@@ -1082,45 +1088,6 @@ int ext4_group_extend(struct super_block *sb, struct ext4_super_block *es,
if ((err = ext4_journal_stop(handle)))
goto exit_put;
- /*
- * Mark mballoc pages as not up to date so that they will be updated
- * next time they are loaded by ext4_mb_load_buddy.
- *
- * XXX Bad, Bad, BAD!!! We should not be overloading the
- * Uptodate flag, particularly on thte bitmap bh, as way of
- * hinting to ext4_mb_load_buddy() that it needs to be
- * overloaded. A user could take a LVM snapshot, then do an
- * on-line fsck, and clear the uptodate flag, and this would
- * not be a bug in userspace, but a bug in the kernel. FIXME!!!
- */
- {
- struct ext4_sb_info *sbi = EXT4_SB(sb);
- struct inode *inode = sbi->s_buddy_cache;
- int blocks_per_page;
- int block;
- int pnum;
- struct page *page;
-
- /* Set buddy page as not up to date */
- blocks_per_page = PAGE_CACHE_SIZE / sb->s_blocksize;
- block = group * 2;
- pnum = block / blocks_per_page;
- page = find_get_page(inode->i_mapping, pnum);
- if (page != NULL) {
- ClearPageUptodate(page);
- page_cache_release(page);
- }
-
- /* Set bitmap page as not up to date */
- block++;
- pnum = block / blocks_per_page;
- page = find_get_page(inode->i_mapping, pnum);
- if (page != NULL) {
- ClearPageUptodate(page);
- page_cache_release(page);
- }
- }
-
if (test_opt(sb, DEBUG))
printk(KERN_DEBUG "EXT4-fs: extended group to %llu blocks\n",
ext4_blocks_count(es));