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| author | Dmitry Monakhov <dmonakhov@openvz.org> | 2010-02-09 17:53:36 +0100 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2010-03-05 00:20:21 +0100 |
| commit | c469070aea5a0ada45a836937c776fd3083dae2b (patch) | |
| tree | 8c36117b34aba28a73c2fe4e03c7e89c2f43aef3 /fs/quota | |
| parent | c7e8d4d6dceeb6fd236991f590d3fa6f97c59874 (diff) | |
| download | lwn-c469070aea5a0ada45a836937c776fd3083dae2b.tar.gz lwn-c469070aea5a0ada45a836937c776fd3083dae2b.zip | |
quota: manage reserved space when quota is not active [v2]
Since we implemented generic reserved space management interface,
then it is possible to account reserved space even when quota
is not active (similar to i_blocks/i_bytes).
Without this patch following testcase result in massive comlain from
WARN_ON in dquot_claim_space()
TEST_CASE:
mount /dev/sdb /mnt -oquota
dd if=/dev/zero of=/mnt/test bs=1M count=1
quotaon /mnt
# fs_reserved_spave == 1Mb
# quota_reserved_space == 0, because quota was disabled
dd if=/dev/zero of=/mnt/test seek=1 bs=1M count=1
# fs_reserved_spave == 2Mb
# quota_reserved_space == 1Mb
sync # ->dquot_claim_space() -> WARN_ON
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/quota')
| -rw-r--r-- | fs/quota/dquot.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c index f6eaf0d8fd6a..f11255b18b58 100644 --- a/fs/quota/dquot.c +++ b/fs/quota/dquot.c @@ -1354,28 +1354,30 @@ static qsize_t *inode_reserved_space(struct inode * inode) return inode->i_sb->dq_op->get_reserved_space(inode); } -static void inode_add_rsv_space(struct inode *inode, qsize_t number) +void inode_add_rsv_space(struct inode *inode, qsize_t number) { spin_lock(&inode->i_lock); *inode_reserved_space(inode) += number; spin_unlock(&inode->i_lock); } +EXPORT_SYMBOL(inode_add_rsv_space); - -static void inode_claim_rsv_space(struct inode *inode, qsize_t number) +void inode_claim_rsv_space(struct inode *inode, qsize_t number) { spin_lock(&inode->i_lock); *inode_reserved_space(inode) -= number; __inode_add_bytes(inode, number); spin_unlock(&inode->i_lock); } +EXPORT_SYMBOL(inode_claim_rsv_space); -static void inode_sub_rsv_space(struct inode *inode, qsize_t number) +void inode_sub_rsv_space(struct inode *inode, qsize_t number) { spin_lock(&inode->i_lock); *inode_reserved_space(inode) -= number; spin_unlock(&inode->i_lock); } +EXPORT_SYMBOL(inode_sub_rsv_space); static qsize_t inode_get_rsv_space(struct inode *inode) { |