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authorDmitry Monakhov <dmonakhov@openvz.org>2009-12-10 16:36:27 (GMT)
committerJan Kara <jack@suse.cz>2009-12-23 12:44:12 (GMT)
commit39bc680a8160bb9d6743f7873b535d553ff61058 (patch)
tree6aac2c11b09870bffb877dcaf6ae44b34b56d4db /fs
parentd21cd8f163ac44b15c465aab7306db931c606908 (diff)
downloadlinux-39bc680a8160bb9d6743f7873b535d553ff61058.tar.xz
ext4: fix sleep inside spinlock issue with quota and dealloc (#14739)
Unlock i_block_reservation_lock before vfs_dq_reserve_block(). This patch fixes http://bugzilla.kernel.org/show_bug.cgi?id=14739 CC: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs')
-rw-r--r--fs/ext4/inode.c11
1 files changed, 5 insertions, 6 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index ddd0a9c..ab80796 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -1816,19 +1816,17 @@ repeat:
md_needed = mdblocks - EXT4_I(inode)->i_reserved_meta_blocks;
total = md_needed + nrblocks;
+ spin_unlock(&EXT4_I(inode)->i_block_reservation_lock);
/*
* Make quota reservation here to prevent quota overflow
* later. Real quota accounting is done at pages writeout
* time.
*/
- if (vfs_dq_reserve_block(inode, total)) {
- spin_unlock(&EXT4_I(inode)->i_block_reservation_lock);
+ if (vfs_dq_reserve_block(inode, total))
return -EDQUOT;
- }
if (ext4_claim_free_blocks(sbi, total)) {
- spin_unlock(&EXT4_I(inode)->i_block_reservation_lock);
vfs_dq_release_reservation_block(inode, total);
if (ext4_should_retry_alloc(inode->i_sb, &retries)) {
yield();
@@ -1836,10 +1834,11 @@ repeat:
}
return -ENOSPC;
}
+ spin_lock(&EXT4_I(inode)->i_block_reservation_lock);
EXT4_I(inode)->i_reserved_data_blocks += nrblocks;
- EXT4_I(inode)->i_reserved_meta_blocks = mdblocks;
-
+ EXT4_I(inode)->i_reserved_meta_blocks += md_needed;
spin_unlock(&EXT4_I(inode)->i_block_reservation_lock);
+
return 0; /* success */
}