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- /*
- * Definitions for diskquota-operations. When diskquota is configured these
- * macros expand to the right source-code.
- *
- * Author: Marco van Wieringen <mvw@planets.elm.net>
- */
- #ifndef _LINUX_QUOTAOPS_
- #define _LINUX_QUOTAOPS_
- #include <linux/fs.h>
- static inline struct quota_info *sb_dqopt(struct super_block *sb)
- {
- return &sb->s_dquot;
- }
- #if defined(CONFIG_QUOTA)
- /*
- * declaration of quota_function calls in kernel.
- */
- void inode_add_rsv_space(struct inode *inode, qsize_t number);
- void inode_claim_rsv_space(struct inode *inode, qsize_t number);
- void inode_sub_rsv_space(struct inode *inode, qsize_t number);
- int dquot_initialize(struct inode *inode, int type);
- int dquot_drop(struct inode *inode);
- struct dquot *dqget(struct super_block *sb, unsigned int id, int type);
- void dqput(struct dquot *dquot);
- int dquot_scan_active(struct super_block *sb,
- int (*fn)(struct dquot *dquot, unsigned long priv),
- unsigned long priv);
- 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 prealloc);
- int dquot_alloc_inode(const struct inode *inode, qsize_t number);
- int dquot_reserve_space(struct inode *inode, qsize_t number, int prealloc);
- int dquot_claim_space(struct inode *inode, qsize_t number);
- void dquot_release_reserved_space(struct inode *inode, qsize_t number);
- int dquot_free_space(struct inode *inode, qsize_t number);
- int dquot_free_inode(const struct inode *inode, qsize_t number);
- int dquot_transfer(struct inode *inode, struct iattr *iattr);
- int dquot_commit(struct dquot *dquot);
- int dquot_acquire(struct dquot *dquot);
- int dquot_release(struct dquot *dquot);
- int dquot_commit_info(struct super_block *sb, int type);
- int dquot_mark_dquot_dirty(struct dquot *dquot);
- 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,
- unsigned int flags);
- int vfs_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 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);
- void vfs_dq_drop(struct inode *inode);
- int vfs_dq_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)
- {
- return sb_dqopt(sb)->info + type;
- }
- /*
- * Functions for checking status of quota
- */
- static inline bool sb_has_quota_usage_enabled(struct super_block *sb, int type)
- {
- return sb_dqopt(sb)->flags &
- dquot_state_flag(DQUOT_USAGE_ENABLED, type);
- }
- static inline bool sb_has_quota_limits_enabled(struct super_block *sb, int type)
- {
- return sb_dqopt(sb)->flags &
- dquot_state_flag(DQUOT_LIMITS_ENABLED, type);
- }
- static inline bool sb_has_quota_suspended(struct super_block *sb, int type)
- {
- return sb_dqopt(sb)->flags &
- dquot_state_flag(DQUOT_SUSPENDED, type);
- }
- static inline unsigned sb_any_quota_suspended(struct super_block *sb)
- {
- unsigned type, tmsk = 0;
- for (type = 0; type < MAXQUOTAS; type++)
- tmsk |= sb_has_quota_suspended(sb, type) << type;
- return tmsk;
- }
- /* Does kernel know about any quota information for given sb + type? */
- static inline bool sb_has_quota_loaded(struct super_block *sb, int type)
- {
- /* Currently if anything is on, then quota usage is on as well */
- return sb_has_quota_usage_enabled(sb, type);
- }
- static inline unsigned sb_any_quota_loaded(struct super_block *sb)
- {
- unsigned type, tmsk = 0;
- for (type = 0; type < MAXQUOTAS; type++)
- tmsk |= sb_has_quota_loaded(sb, type) << type;
- return tmsk;
- }
- static inline bool sb_has_quota_active(struct super_block *sb, int type)
- {
- return sb_has_quota_loaded(sb, type) &&
- !sb_has_quota_suspended(sb, type);
- }
- static inline unsigned sb_any_quota_active(struct super_block *sb)
- {
- return sb_any_quota_loaded(sb) & ~sb_any_quota_suspended(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)
- /* 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 vfs_dq_init(struct inode *inode)
- {
- BUG_ON(!inode->i_sb);
- if (sb_any_quota_active(inode->i_sb) && !IS_NOQUOTA(inode))
- inode->i_sb->dq_op->initialize(inode, -1);
- }
- /* The following allocation/freeing/transfer functions *must* be called inside
- * a transaction (deadlocks possible otherwise) */
- static inline int vfs_dq_prealloc_space_nodirty(struct inode *inode, qsize_t nr)
- {
- if (sb_any_quota_active(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 vfs_dq_prealloc_space(struct inode *inode, qsize_t nr)
- {
- int ret;
- if (!(ret = vfs_dq_prealloc_space_nodirty(inode, nr)))
- mark_inode_dirty(inode);
- return ret;
- }
- static inline int vfs_dq_alloc_space_nodirty(struct inode *inode, qsize_t nr)
- {
- if (sb_any_quota_active(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 vfs_dq_alloc_space(struct inode *inode, qsize_t nr)
- {
- int ret;
- if (!(ret = vfs_dq_alloc_space_nodirty(inode, nr)))
- mark_inode_dirty(inode);
- return ret;
- }
- static inline int vfs_dq_reserve_space(struct inode *inode, qsize_t nr)
- {
- if (sb_any_quota_active(inode->i_sb)) {
- /* Used space is updated in alloc_space() */
- if (inode->i_sb->dq_op->reserve_space(inode, nr, 0) == NO_QUOTA)
- return 1;
- }
- else
- inode_add_rsv_space(inode, nr);
- return 0;
- }
- static inline int vfs_dq_alloc_inode(struct inode *inode)
- {
- if (sb_any_quota_active(inode->i_sb)) {
- vfs_dq_init(inode);
- if (inode->i_sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA)
- return 1;
- }
- return 0;
- }
- /*
- * Convert in-memory reserved quotas to real consumed quotas
- */
- static inline int vfs_dq_claim_space(struct inode *inode, qsize_t nr)
- {
- if (sb_any_quota_active(inode->i_sb)) {
- if (inode->i_sb->dq_op->claim_space(inode, nr) == NO_QUOTA)
- return 1;
- } else
- inode_claim_rsv_space(inode, nr);
- mark_inode_dirty(inode);
- return 0;
- }
- /*
- * Release reserved (in-memory) quotas
- */
- static inline
- void vfs_dq_release_reservation_space(struct inode *inode, qsize_t nr)
- {
- if (sb_any_quota_active(inode->i_sb))
- inode->i_sb->dq_op->release_rsv(inode, nr);
- else
- inode_sub_rsv_space(inode, nr);
- }
- static inline void vfs_dq_free_space_nodirty(struct inode *inode, qsize_t nr)
- {
- if (sb_any_quota_active(inode->i_sb))
- inode->i_sb->dq_op->free_space(inode, nr);
- else
- inode_sub_bytes(inode, nr);
- }
- static inline void vfs_dq_free_space(struct inode *inode, qsize_t nr)
- {
- vfs_dq_free_space_nodirty(inode, nr);
- mark_inode_dirty(inode);
- }
- static inline void vfs_dq_free_inode(struct inode *inode)
- {
- if (sb_any_quota_active(inode->i_sb))
- inode->i_sb->dq_op->free_inode(inode, 1);
- }
- /* 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;
- }
- #else
- static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type)
- {
- return 0;
- }
- static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type)
- {
- return 0;
- }
- static inline int sb_has_quota_suspended(struct super_block *sb, int type)
- {
- return 0;
- }
- static inline int sb_any_quota_suspended(struct super_block *sb)
- {
- return 0;
- }
- /* Does kernel know about any quota information for given sb + type? */
- static inline int sb_has_quota_loaded(struct super_block *sb, int type)
- {
- return 0;
- }
- static inline int sb_any_quota_loaded(struct super_block *sb)
- {
- return 0;
- }
- static inline int sb_has_quota_active(struct super_block *sb, int type)
- {
- return 0;
- }
- 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 vfs_dq_init(struct inode *inode)
- {
- }
- static inline void vfs_dq_drop(struct inode *inode)
- {
- }
- static inline int vfs_dq_alloc_inode(struct inode *inode)
- {
- return 0;
- }
- static inline void vfs_dq_free_inode(struct inode *inode)
- {
- }
- static inline int vfs_dq_off(struct super_block *sb, int remount)
- {
- return 0;
- }
- static inline int vfs_dq_quota_on_remount(struct super_block *sb)
- {
- return 0;
- }
- static inline int vfs_dq_transfer(struct inode *inode, struct iattr *iattr)
- {
- return 0;
- }
- static inline int vfs_dq_prealloc_space_nodirty(struct inode *inode, qsize_t nr)
- {
- inode_add_bytes(inode, nr);
- return 0;
- }
- static inline int vfs_dq_prealloc_space(struct inode *inode, qsize_t nr)
- {
- vfs_dq_prealloc_space_nodirty(inode, nr);
- mark_inode_dirty(inode);
- return 0;
- }
- static inline int vfs_dq_alloc_space_nodirty(struct inode *inode, qsize_t nr)
- {
- inode_add_bytes(inode, nr);
- return 0;
- }
- static inline int vfs_dq_alloc_space(struct inode *inode, qsize_t nr)
- {
- vfs_dq_alloc_space_nodirty(inode, nr);
- mark_inode_dirty(inode);
- return 0;
- }
- static inline int vfs_dq_reserve_space(struct inode *inode, qsize_t nr)
- {
- return 0;
- }
- static inline int vfs_dq_claim_space(struct inode *inode, qsize_t nr)
- {
- return vfs_dq_alloc_space(inode, nr);
- }
- static inline
- int vfs_dq_release_reservation_space(struct inode *inode, qsize_t nr)
- {
- return 0;
- }
- static inline void vfs_dq_free_space_nodirty(struct inode *inode, qsize_t nr)
- {
- inode_sub_bytes(inode, nr);
- }
- static inline void vfs_dq_free_space(struct inode *inode, qsize_t nr)
- {
- vfs_dq_free_space_nodirty(inode, nr);
- mark_inode_dirty(inode);
- }
- #endif /* CONFIG_QUOTA */
- static inline int vfs_dq_prealloc_block_nodirty(struct inode *inode, qsize_t nr)
- {
- return vfs_dq_prealloc_space_nodirty(inode, nr << inode->i_blkbits);
- }
- static inline int vfs_dq_prealloc_block(struct inode *inode, qsize_t nr)
- {
- return vfs_dq_prealloc_space(inode, nr << inode->i_blkbits);
- }
- static inline int vfs_dq_alloc_block_nodirty(struct inode *inode, qsize_t nr)
- {
- return vfs_dq_alloc_space_nodirty(inode, nr << inode->i_blkbits);
- }
- static inline int vfs_dq_alloc_block(struct inode *inode, qsize_t nr)
- {
- return vfs_dq_alloc_space(inode, nr << inode->i_blkbits);
- }
- static inline int vfs_dq_reserve_block(struct inode *inode, qsize_t nr)
- {
- return vfs_dq_reserve_space(inode, nr << inode->i_blkbits);
- }
- static inline int vfs_dq_claim_block(struct inode *inode, qsize_t nr)
- {
- return vfs_dq_claim_space(inode, nr << inode->i_blkbits);
- }
- static inline
- void vfs_dq_release_reservation_block(struct inode *inode, qsize_t nr)
- {
- vfs_dq_release_reservation_space(inode, nr << inode->i_blkbits);
- }
- static inline void vfs_dq_free_block_nodirty(struct inode *inode, qsize_t nr)
- {
- vfs_dq_free_space_nodirty(inode, nr << inode->i_blkbits);
- }
- static inline void vfs_dq_free_block(struct inode *inode, qsize_t nr)
- {
- vfs_dq_free_space(inode, nr << inode->i_blkbits);
- }
- #endif /* _LINUX_QUOTAOPS_ */
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