diff options
Diffstat (limited to 'include/linux/quotaops.h')
| -rw-r--r-- | include/linux/quotaops.h | 127 |
1 files changed, 73 insertions, 54 deletions
diff --git a/include/linux/quotaops.h b/include/linux/quotaops.h index e6fa7acce290..aa36793b48bd 100644 --- a/include/linux/quotaops.h +++ b/include/linux/quotaops.h @@ -9,11 +9,23 @@ #include <linux/fs.h> +#define DQUOT_SPACE_WARN 0x1 +#define DQUOT_SPACE_RESERVE 0x2 +#define DQUOT_SPACE_NOFAIL 0x4 + static inline struct quota_info *sb_dqopt(struct super_block *sb) { return &sb->s_dquot; } +/* i_mutex must being held */ +static inline bool is_quota_modification(struct inode *inode, struct iattr *ia) +{ + return (ia->ia_valid & ATTR_SIZE && ia->ia_size != inode->i_size) || + (ia->ia_valid & ATTR_UID && ia->ia_uid != inode->i_uid) || + (ia->ia_valid & ATTR_GID && ia->ia_gid != inode->i_gid); +} + #if defined(CONFIG_QUOTA) /* @@ -33,15 +45,22 @@ int dquot_scan_active(struct super_block *sb, struct dquot *dquot_alloc(struct super_block *sb, int type); void dquot_destroy(struct dquot *dquot); -int __dquot_alloc_space(struct inode *inode, qsize_t number, - int warn, int reserve); -void __dquot_free_space(struct inode *inode, qsize_t number, int reserve); +int __dquot_alloc_space(struct inode *inode, qsize_t number, int flags); +void __dquot_free_space(struct inode *inode, qsize_t number, int flags); int dquot_alloc_inode(const struct inode *inode); int dquot_claim_space_nodirty(struct inode *inode, qsize_t number); void dquot_free_inode(const struct inode *inode); +int dquot_disable(struct super_block *sb, int type, unsigned int flags); +/* Suspend quotas on remount RO */ +static inline int dquot_suspend(struct super_block *sb, int type) +{ + return dquot_disable(sb, type, DQUOT_SUSPENDED); +} +int dquot_resume(struct super_block *sb, int type); + int dquot_commit(struct dquot *dquot); int dquot_acquire(struct dquot *dquot); int dquot_release(struct dquot *dquot); @@ -50,24 +69,25 @@ int dquot_mark_dquot_dirty(struct dquot *dquot); int dquot_file_open(struct inode *inode, struct file *file); -int vfs_quota_on(struct super_block *sb, int type, int format_id, - char *path, int remount); -int vfs_quota_enable(struct inode *inode, int type, int format_id, +int dquot_quota_on(struct super_block *sb, int type, int format_id, + char *path); +int dquot_enable(struct inode *inode, int type, int format_id, unsigned int flags); -int vfs_quota_on_path(struct super_block *sb, int type, int format_id, +int dquot_quota_on_path(struct super_block *sb, int type, int format_id, struct path *path); -int vfs_quota_on_mount(struct super_block *sb, char *qf_name, +int dquot_quota_on_mount(struct super_block *sb, char *qf_name, int format_id, int type); -int vfs_quota_off(struct super_block *sb, int type, int remount); -int vfs_quota_disable(struct super_block *sb, int type, unsigned int flags); -int vfs_quota_sync(struct super_block *sb, int type, int wait); -int vfs_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii); -int vfs_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii); -int vfs_get_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di); -int vfs_set_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di); - +int dquot_quota_off(struct super_block *sb, int type); +int dquot_quota_sync(struct super_block *sb, int type, int wait); +int dquot_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii); +int dquot_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii); +int dquot_get_dqblk(struct super_block *sb, int type, qid_t id, + struct fs_disk_quota *di); +int dquot_set_dqblk(struct super_block *sb, int type, qid_t id, + struct fs_disk_quota *di); + +int __dquot_transfer(struct inode *inode, struct dquot **transfer_to); int dquot_transfer(struct inode *inode, struct iattr *iattr); -int vfs_dq_quota_on_remount(struct super_block *sb); static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type) { @@ -134,20 +154,7 @@ static inline unsigned sb_any_quota_active(struct super_block *sb) * Operations supported for diskquotas. */ extern const struct dquot_operations dquot_operations; -extern const struct quotactl_ops vfs_quotactl_ops; - -#define sb_dquot_ops (&dquot_operations) -#define sb_quotactl_ops (&vfs_quotactl_ops) - -/* Cannot be called inside a transaction */ -static inline int vfs_dq_off(struct super_block *sb, int remount) -{ - int ret = -ENOSYS; - - if (sb->s_qcop && sb->s_qcop->quota_off) - ret = sb->s_qcop->quota_off(sb, -1, remount); - return ret; -} +extern const struct quotactl_ops dquot_quotactl_ops; #else @@ -192,12 +199,6 @@ static inline int sb_any_quota_active(struct super_block *sb) return 0; } -/* - * NO-OP when quota not configured. - */ -#define sb_dquot_ops (NULL) -#define sb_quotactl_ops (NULL) - static inline void dquot_initialize(struct inode *inode) { } @@ -215,39 +216,45 @@ static inline void dquot_free_inode(const struct inode *inode) { } -static inline int vfs_dq_off(struct super_block *sb, int remount) +static inline int dquot_transfer(struct inode *inode, struct iattr *iattr) { return 0; } -static inline int vfs_dq_quota_on_remount(struct super_block *sb) +static inline int __dquot_alloc_space(struct inode *inode, qsize_t number, + int flags) { + if (!(flags & DQUOT_SPACE_RESERVE)) + inode_add_bytes(inode, number); return 0; } -static inline int dquot_transfer(struct inode *inode, struct iattr *iattr) +static inline void __dquot_free_space(struct inode *inode, qsize_t number, + int flags) +{ + if (!(flags & DQUOT_SPACE_RESERVE)) + inode_sub_bytes(inode, number); +} + +static inline int dquot_claim_space_nodirty(struct inode *inode, qsize_t number) { + inode_add_bytes(inode, number); return 0; } -static inline int __dquot_alloc_space(struct inode *inode, qsize_t number, - int warn, int reserve) +static inline int dquot_disable(struct super_block *sb, int type, + unsigned int flags) { - if (!reserve) - inode_add_bytes(inode, number); return 0; } -static inline void __dquot_free_space(struct inode *inode, qsize_t number, - int reserve) +static inline int dquot_suspend(struct super_block *sb, int type) { - if (!reserve) - inode_sub_bytes(inode, number); + return 0; } -static inline int dquot_claim_space_nodirty(struct inode *inode, qsize_t number) +static inline int dquot_resume(struct super_block *sb, int type) { - inode_add_bytes(inode, number); return 0; } @@ -257,7 +264,13 @@ static inline int dquot_claim_space_nodirty(struct inode *inode, qsize_t number) static inline int dquot_alloc_space_nodirty(struct inode *inode, qsize_t nr) { - return __dquot_alloc_space(inode, nr, 1, 0); + return __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN); +} + +static inline void dquot_alloc_space_nofail(struct inode *inode, qsize_t nr) +{ + __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN|DQUOT_SPACE_NOFAIL); + mark_inode_dirty(inode); } static inline int dquot_alloc_space(struct inode *inode, qsize_t nr) @@ -275,6 +288,11 @@ static inline int dquot_alloc_block_nodirty(struct inode *inode, qsize_t nr) return dquot_alloc_space_nodirty(inode, nr << inode->i_blkbits); } +static inline void dquot_alloc_block_nofail(struct inode *inode, qsize_t nr) +{ + dquot_alloc_space_nofail(inode, nr << inode->i_blkbits); +} + static inline int dquot_alloc_block(struct inode *inode, qsize_t nr) { return dquot_alloc_space(inode, nr << inode->i_blkbits); @@ -282,7 +300,7 @@ static inline int dquot_alloc_block(struct inode *inode, qsize_t nr) static inline int dquot_prealloc_block_nodirty(struct inode *inode, qsize_t nr) { - return __dquot_alloc_space(inode, nr << inode->i_blkbits, 0, 0); + return __dquot_alloc_space(inode, nr << inode->i_blkbits, 0); } static inline int dquot_prealloc_block(struct inode *inode, qsize_t nr) @@ -297,7 +315,8 @@ static inline int dquot_prealloc_block(struct inode *inode, qsize_t nr) static inline int dquot_reserve_block(struct inode *inode, qsize_t nr) { - return __dquot_alloc_space(inode, nr << inode->i_blkbits, 1, 1); + return __dquot_alloc_space(inode, nr << inode->i_blkbits, + DQUOT_SPACE_WARN|DQUOT_SPACE_RESERVE); } static inline int dquot_claim_block(struct inode *inode, qsize_t nr) @@ -334,7 +353,7 @@ static inline void dquot_free_block(struct inode *inode, qsize_t nr) static inline void dquot_release_reservation_block(struct inode *inode, qsize_t nr) { - __dquot_free_space(inode, nr << inode->i_blkbits, 1); + __dquot_free_space(inode, nr << inode->i_blkbits, DQUOT_SPACE_RESERVE); } #endif /* _LINUX_QUOTAOPS_ */ |