| /* |
| * Definitions for diskquota-operations. When diskquota is configured these |
| * macros expand to the right source-code. |
| * |
| * Author: Marco van Wieringen <mvw@planets.elm.net> |
| * |
| * Version: $Id: quotaops.h,v 1.2 1998/01/15 16:22:26 ecd Exp $ |
| * |
| */ |
| #ifndef _LINUX_QUOTAOPS_ |
| #define _LINUX_QUOTAOPS_ |
| |
| #include <linux/smp_lock.h> |
| |
| #include <linux/fs.h> |
| |
| #if defined(CONFIG_QUOTA) |
| |
| /* |
| * declaration of quota_function calls in kernel. |
| */ |
| extern void sync_dquots(struct super_block *sb, int type); |
| |
| extern int dquot_initialize(struct inode *inode, int type); |
| extern int dquot_drop(struct inode *inode); |
| |
| extern int dquot_alloc_space(struct inode *inode, qsize_t number, int prealloc); |
| extern int dquot_alloc_inode(const struct inode *inode, unsigned long number); |
| |
| extern int dquot_free_space(struct inode *inode, qsize_t number); |
| extern int dquot_free_inode(const struct inode *inode, unsigned long number); |
| |
| extern int dquot_transfer(struct inode *inode, struct iattr *iattr); |
| extern int dquot_commit(struct dquot *dquot); |
| extern int dquot_acquire(struct dquot *dquot); |
| extern int dquot_release(struct dquot *dquot); |
| extern int dquot_commit_info(struct super_block *sb, int type); |
| extern int dquot_mark_dquot_dirty(struct dquot *dquot); |
| |
| extern int vfs_quota_on(struct super_block *sb, int type, int format_id, char *path); |
| extern int vfs_quota_on_mount(struct super_block *sb, char *qf_name, |
| int format_id, int type); |
| extern int vfs_quota_off(struct super_block *sb, int type); |
| extern int vfs_quota_sync(struct super_block *sb, int type); |
| extern int vfs_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii); |
| extern int vfs_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii); |
| extern int vfs_get_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di); |
| extern int vfs_set_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di); |
| |
| /* |
| * Operations supported for diskquotas. |
| */ |
| extern struct dquot_operations dquot_operations; |
| extern struct quotactl_ops vfs_quotactl_ops; |
| |
| #define sb_dquot_ops (&dquot_operations) |
| #define sb_quotactl_ops (&vfs_quotactl_ops) |
| |
| /* It is better to call this function outside of any transaction as it might |
| * need a lot of space in journal for dquot structure allocation. */ |
| static inline void DQUOT_INIT(struct inode *inode) |
| { |
| BUG_ON(!inode->i_sb); |
| if (sb_any_quota_enabled(inode->i_sb) && !IS_NOQUOTA(inode)) |
| inode->i_sb->dq_op->initialize(inode, -1); |
| } |
| |
| /* The same as with DQUOT_INIT */ |
| static inline void DQUOT_DROP(struct inode *inode) |
| { |
| /* Here we can get arbitrary inode from clear_inode() so we have |
| * to be careful. OTOH we don't need locking as quota operations |
| * are allowed to change only at mount time */ |
| if (!IS_NOQUOTA(inode) && inode->i_sb && inode->i_sb->dq_op |
| && inode->i_sb->dq_op->drop) { |
| int cnt; |
| /* Test before calling to rule out calls from proc and such |
| * where we are not allowed to block. Note that this is |
| * actually reliable test even without the lock - the caller |
| * must assure that nobody can come after the DQUOT_DROP and |
| * add quota pointers back anyway */ |
| for (cnt = 0; cnt < MAXQUOTAS; cnt++) |
| if (inode->i_dquot[cnt] != NODQUOT) |
| break; |
| if (cnt < MAXQUOTAS) |
| inode->i_sb->dq_op->drop(inode); |
| } |
| } |
| |
| /* The following allocation/freeing/transfer functions *must* be called inside |
| * a transaction (deadlocks possible otherwise) */ |
| static inline int DQUOT_PREALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr) |
| { |
| if (sb_any_quota_enabled(inode->i_sb)) { |
| /* Used space is updated in alloc_space() */ |
| if (inode->i_sb->dq_op->alloc_space(inode, nr, 1) == NO_QUOTA) |
| return 1; |
| } |
| else |
| inode_add_bytes(inode, nr); |
| return 0; |
| } |
| |
| static inline int DQUOT_PREALLOC_SPACE(struct inode *inode, qsize_t nr) |
| { |
| int ret; |
| if (!(ret = DQUOT_PREALLOC_SPACE_NODIRTY(inode, nr))) |
| mark_inode_dirty(inode); |
| return ret; |
| } |
| |
| static inline int DQUOT_ALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr) |
| { |
| if (sb_any_quota_enabled(inode->i_sb)) { |
| /* Used space is updated in alloc_space() */ |
| if (inode->i_sb->dq_op->alloc_space(inode, nr, 0) == NO_QUOTA) |
| return 1; |
| } |
| else |
| inode_add_bytes(inode, nr); |
| return 0; |
| } |
| |
| static inline int DQUOT_ALLOC_SPACE(struct inode *inode, qsize_t nr) |
| { |
| int ret; |
| if (!(ret = DQUOT_ALLOC_SPACE_NODIRTY(inode, nr))) |
| mark_inode_dirty(inode); |
| return ret; |
| } |
| |
| static inline int DQUOT_ALLOC_INODE(struct inode *inode) |
| { |
| if (sb_any_quota_enabled(inode->i_sb)) { |
| DQUOT_INIT(inode); |
| if (inode->i_sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA) |
| return 1; |
| } |
| return 0; |
| } |
| |
| static inline void DQUOT_FREE_SPACE_NODIRTY(struct inode *inode, qsize_t nr) |
| { |
| if (sb_any_quota_enabled(inode->i_sb)) |
| inode->i_sb->dq_op->free_space(inode, nr); |
| else |
| inode_sub_bytes(inode, nr); |
| } |
| |
| static inline void DQUOT_FREE_SPACE(struct inode *inode, qsize_t nr) |
| { |
| DQUOT_FREE_SPACE_NODIRTY(inode, nr); |
| mark_inode_dirty(inode); |
| } |
| |
| static inline void DQUOT_FREE_INODE(struct inode *inode) |
| { |
| if (sb_any_quota_enabled(inode->i_sb)) |
| inode->i_sb->dq_op->free_inode(inode, 1); |
| } |
| |
| static inline int DQUOT_TRANSFER(struct inode *inode, struct iattr *iattr) |
| { |
| if (sb_any_quota_enabled(inode->i_sb) && !IS_NOQUOTA(inode)) { |
| DQUOT_INIT(inode); |
| if (inode->i_sb->dq_op->transfer(inode, iattr) == NO_QUOTA) |
| return 1; |
| } |
| return 0; |
| } |
| |
| /* The following two functions cannot be called inside a transaction */ |
| static inline void DQUOT_SYNC(struct super_block *sb) |
| { |
| sync_dquots(sb, -1); |
| } |
| |
| static inline int DQUOT_OFF(struct super_block *sb) |
| { |
| int ret = -ENOSYS; |
| |
| if (sb_any_quota_enabled(sb) && sb->s_qcop && sb->s_qcop->quota_off) |
| ret = sb->s_qcop->quota_off(sb, -1); |
| return ret; |
| } |
| |
| #else |
| |
| /* |
| * NO-OP when quota not configured. |
| */ |
| #define sb_dquot_ops (NULL) |
| #define sb_quotactl_ops (NULL) |
| #define DQUOT_INIT(inode) do { } while(0) |
| #define DQUOT_DROP(inode) do { } while(0) |
| #define DQUOT_ALLOC_INODE(inode) (0) |
| #define DQUOT_FREE_INODE(inode) do { } while(0) |
| #define DQUOT_SYNC(sb) do { } while(0) |
| #define DQUOT_OFF(sb) (0) |
| #define DQUOT_TRANSFER(inode, iattr) (0) |
| static inline int DQUOT_PREALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr) |
| { |
| inode_add_bytes(inode, nr); |
| return 0; |
| } |
| |
| static inline int DQUOT_PREALLOC_SPACE(struct inode *inode, qsize_t nr) |
| { |
| DQUOT_PREALLOC_SPACE_NODIRTY(inode, nr); |
| mark_inode_dirty(inode); |
| return 0; |
| } |
| |
| static inline int DQUOT_ALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr) |
| { |
| inode_add_bytes(inode, nr); |
| return 0; |
| } |
| |
| static inline int DQUOT_ALLOC_SPACE(struct inode *inode, qsize_t nr) |
| { |
| DQUOT_ALLOC_SPACE_NODIRTY(inode, nr); |
| mark_inode_dirty(inode); |
| return 0; |
| } |
| |
| static inline void DQUOT_FREE_SPACE_NODIRTY(struct inode *inode, qsize_t nr) |
| { |
| inode_sub_bytes(inode, nr); |
| } |
| |
| static inline void DQUOT_FREE_SPACE(struct inode *inode, qsize_t nr) |
| { |
| DQUOT_FREE_SPACE_NODIRTY(inode, nr); |
| mark_inode_dirty(inode); |
| } |
| |
| #endif /* CONFIG_QUOTA */ |
| |
| static inline int DQUOT_PREALLOC_BLOCK_NODIRTY(struct inode *inode, qsize_t nr) |
| { |
| return DQUOT_PREALLOC_SPACE_NODIRTY(inode, |
| nr << inode->i_sb->s_blocksize_bits); |
| } |
| |
| static inline int DQUOT_PREALLOC_BLOCK(struct inode *inode, qsize_t nr) |
| { |
| return DQUOT_PREALLOC_SPACE(inode, |
| nr << inode->i_sb->s_blocksize_bits); |
| } |
| |
| static inline int DQUOT_ALLOC_BLOCK_NODIRTY(struct inode *inode, qsize_t nr) |
| { |
| return DQUOT_ALLOC_SPACE_NODIRTY(inode, |
| nr << inode->i_sb->s_blocksize_bits); |
| } |
| |
| static inline int DQUOT_ALLOC_BLOCK(struct inode *inode, qsize_t nr) |
| { |
| return DQUOT_ALLOC_SPACE(inode, |
| nr << inode->i_sb->s_blocksize_bits); |
| } |
| |
| static inline void DQUOT_FREE_BLOCK_NODIRTY(struct inode *inode, qsize_t nr) |
| { |
| DQUOT_FREE_SPACE_NODIRTY(inode, nr << inode->i_sb->s_blocksize_bits); |
| } |
| |
| static inline void DQUOT_FREE_BLOCK(struct inode *inode, qsize_t nr) |
| { |
| DQUOT_FREE_SPACE(inode, nr << inode->i_sb->s_blocksize_bits); |
| } |
| |
| #endif /* _LINUX_QUOTAOPS_ */ |