/* * 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/smp_lock.h> #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 sync_dquots(struct super_block *sb, int type); 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_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 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 int 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 int 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 int sb_has_quota_suspended(struct super_block *sb, int type) { return sb_dqopt(sb)->flags & dquot_state_flag(DQUOT_SUSPENDED, type); } static inline int sb_any_quota_suspended(struct super_block *sb) { return sb_has_quota_suspended(sb, USRQUOTA) || sb_has_quota_suspended(sb, GRPQUOTA); } /* Does kernel know about any quota information for given sb + type? */ static inline int 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 int sb_any_quota_loaded(struct super_block *sb) { return sb_has_quota_loaded(sb, USRQUOTA) || sb_has_quota_loaded(sb, GRPQUOTA); } static inline int 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 int sb_any_quota_active(struct super_block *sb) { return sb_has_quota_active(sb, USRQUOTA) || sb_has_quota_active(sb, GRPQUOTA); } /* * 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 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_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; } 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); } /* The following two functions cannot be called inside a transaction */ static inline void vfs_dq_sync(struct super_block *sb) { sync_dquots(sb, -1); } 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 void vfs_dq_sync(struct super_block *sb) { } 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 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_sb->s_blocksize_bits); } static inline int vfs_dq_prealloc_block(struct inode *inode, qsize_t nr) { return vfs_dq_prealloc_space(inode, nr << inode->i_sb->s_blocksize_bits); } static inline int vfs_dq_alloc_block_nodirty(struct inode *inode, qsize_t nr) { return vfs_dq_alloc_space_nodirty(inode, nr << inode->i_sb->s_blocksize_bits); } static inline int vfs_dq_alloc_block(struct inode *inode, qsize_t nr) { return vfs_dq_alloc_space(inode, nr << inode->i_sb->s_blocksize_bits); } static inline void vfs_dq_free_block_nodirty(struct inode *inode, qsize_t nr) { vfs_dq_free_space_nodirty(inode, nr << inode->i_sb->s_blocksize_bits); } static inline void vfs_dq_free_block(struct inode *inode, qsize_t nr) { vfs_dq_free_space(inode, nr << inode->i_sb->s_blocksize_bits); } /* * Define uppercase equivalents for compatibility with old function names * Can go away when we think all users have been converted (15/04/2008) */ #define DQUOT_INIT(inode) vfs_dq_init(inode) #define DQUOT_DROP(inode) vfs_dq_drop(inode) #define DQUOT_PREALLOC_SPACE_NODIRTY(inode, nr) \ vfs_dq_prealloc_space_nodirty(inode, nr) #define DQUOT_PREALLOC_SPACE(inode, nr) vfs_dq_prealloc_space(inode, nr) #define DQUOT_ALLOC_SPACE_NODIRTY(inode, nr) \ vfs_dq_alloc_space_nodirty(inode, nr) #define DQUOT_ALLOC_SPACE(inode, nr) vfs_dq_alloc_space(inode, nr) #define DQUOT_PREALLOC_BLOCK_NODIRTY(inode, nr) \ vfs_dq_prealloc_block_nodirty(inode, nr) #define DQUOT_PREALLOC_BLOCK(inode, nr) vfs_dq_prealloc_block(inode, nr) #define DQUOT_ALLOC_BLOCK_NODIRTY(inode, nr) \ vfs_dq_alloc_block_nodirty(inode, nr) #define DQUOT_ALLOC_BLOCK(inode, nr) vfs_dq_alloc_block(inode, nr) #define DQUOT_ALLOC_INODE(inode) vfs_dq_alloc_inode(inode) #define DQUOT_FREE_SPACE_NODIRTY(inode, nr) \ vfs_dq_free_space_nodirty(inode, nr) #define DQUOT_FREE_SPACE(inode, nr) vfs_dq_free_space(inode, nr) #define DQUOT_FREE_BLOCK_NODIRTY(inode, nr) \ vfs_dq_free_block_nodirty(inode, nr) #define DQUOT_FREE_BLOCK(inode, nr) vfs_dq_free_block(inode, nr) #define DQUOT_FREE_INODE(inode) vfs_dq_free_inode(inode) #define DQUOT_TRANSFER(inode, iattr) vfs_dq_transfer(inode, iattr) #define DQUOT_SYNC(sb) vfs_dq_sync(sb) #define DQUOT_OFF(sb, remount) vfs_dq_off(sb, remount) #define DQUOT_ON_REMOUNT(sb) vfs_dq_quota_on_remount(sb) #endif /* _LINUX_QUOTAOPS_ */