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quota: Add ->quota_{enable,disable} callbacks for VFS quotas

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Add functions which translate ->quota_enable / ->quota_disable calls
into appropriate changes in VFS quota. This will enable filesystems
supporting VFS quota files in system inodes to be controlled via
Q_XQUOTA[ON|OFF] quotactls for better userspace compatibility.

Also provide a vector for quotactl using these functions which can be
used by filesystems with quota files stored in hidden system files.

Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Jan Kara 2014-10-06 18:40:51 +02:00
parent d3b8632485
commit 3e2af67e66
2 changed files with 92 additions and 0 deletions
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1
include/linux/quotaops.h
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@ -166,6 +166,7 @@ static inline bool sb_has_quota_active(struct super_block *sb, int type)
*/
extern const struct dquot_operations dquot_operations;
extern const struct quotactl_ops dquot_quotactl_ops;
extern const struct quotactl_ops dquot_quotactl_sysfile_ops;
#else