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quota: Propagate error from ->acquire_dquot()

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Currently when some error happened in ->acquire_dquot(), dqget() just
returned NULL. That was indistinguishable from a case when e.g. someone
run quotaoff and so was generally silently ignored. However
->acquire_dquot() can fail because of ENOSPC or EIO in which case user
should better know. So propagate error up from ->acquire_dquot properly.

Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Jan Kara 2015-06-24 18:07:02 +02:00 • committed by Jan Kara
parent d725e66c06
commit 6184fc0b8d
4 changed files with 72 additions and 33 deletions
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5
include/linux/quotaops.h
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@ -43,7 +43,7 @@ void inode_claim_rsv_space(struct inode *inode, qsize_t number);
void inode_sub_rsv_space(struct inode *inode, qsize_t number);
void inode_reclaim_rsv_space(struct inode *inode, qsize_t number);
void dquot_initialize(struct inode *inode);
int dquot_initialize(struct inode *inode);
void dquot_drop(struct inode *inode);
struct dquot *dqget(struct super_block *sb, struct kqid qid);
static inline struct dquot *dqgrab(struct dquot *dquot)
@ -200,8 +200,9 @@ static inline int sb_has_quota_active(struct super_block *sb, int type)
return 0;
}
static inline void dquot_initialize(struct inode *inode)
static inline int dquot_initialize(struct inode *inode)
{
return 0;
}
static inline void dquot_drop(struct inode *inode)