* 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>
+#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)
/*
* 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);
-#define vfs_quota_off_mount(sb, type) vfs_quota_off(sb, 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);
+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);
+
+void dquot_initialize(struct inode *inode);
+void 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 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);
+int dquot_commit_info(struct super_block *sb, int type);
+int dquot_mark_dquot_dirty(struct dquot *dquot);
+
+int dquot_file_open(struct inode *inode, struct file *file);
+
+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 dquot_quota_on_path(struct super_block *sb, int type, int format_id,
+ struct path *path);
+int dquot_quota_on_mount(struct super_block *sb, char *qf_name,
+ int format_id, int type);
+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);
+
+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 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);
+extern const struct dquot_operations dquot_operations;
+extern const struct quotactl_ops dquot_quotactl_ops;
+
+#else
+
+static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type)
+{
return 0;
}
-static __inline__ int DQUOT_PREALLOC_SPACE(struct inode *inode, qsize_t nr)
+static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type)
{
- int ret;
- if (!(ret = DQUOT_PREALLOC_SPACE_NODIRTY(inode, nr)))
- mark_inode_dirty(inode);
- return ret;
+ return 0;
}
-static __inline__ int DQUOT_ALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
+static inline int sb_has_quota_suspended(struct super_block *sb, int type)
{
- 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)
+static inline int sb_any_quota_suspended(struct super_block *sb)
{
- int ret;
- if (!(ret = DQUOT_ALLOC_SPACE_NODIRTY(inode, nr)))
- mark_inode_dirty(inode);
- return ret;
+ return 0;
}
-static __inline__ int DQUOT_ALLOC_INODE(struct inode *inode)
+/* Does kernel know about any quota information for given sb + type? */
+static inline int sb_has_quota_loaded(struct super_block *sb, int type)
{
- 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)
+static inline int sb_any_quota_loaded(struct super_block *sb)
{
- if (sb_any_quota_enabled(inode->i_sb))
- inode->i_sb->dq_op->free_space(inode, nr);
- else
- inode_sub_bytes(inode, nr);
+ return 0;
}
-static __inline__ void DQUOT_FREE_SPACE(struct inode *inode, qsize_t nr)
+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;
+}
+
+static inline void dquot_initialize(struct inode *inode)
{
- DQUOT_FREE_SPACE_NODIRTY(inode, nr);
- mark_inode_dirty(inode);
}
-static __inline__ void DQUOT_FREE_INODE(struct inode *inode)
+static inline void dquot_drop(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)
+static inline int dquot_alloc_inode(const struct inode *inode)
{
- 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 */
-#define DQUOT_SYNC(sb) sync_dquots(sb, -1)
+static inline void dquot_free_inode(const struct inode *inode)
+{
+}
-static __inline__ int DQUOT_OFF(struct super_block *sb)
+static inline int dquot_transfer(struct inode *inode, struct iattr *iattr)
{
- int ret = -ENOSYS;
+ return 0;
+}
- if (sb_any_quota_enabled(sb) && sb->s_qcop && sb->s_qcop->quota_off)
- ret = sb->s_qcop->quota_off(sb, -1);
- return ret;
+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;
}
-#else
+static inline void __dquot_free_space(struct inode *inode, qsize_t number,
+ int flags)
+{
+ if (!(flags & DQUOT_SPACE_RESERVE))
+ inode_sub_bytes(inode, number);
+}
-/*
- * 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) do { } while(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);
+static inline int dquot_claim_space_nodirty(struct inode *inode, qsize_t number)
+{
+ inode_add_bytes(inode, number);
return 0;
}
-static inline int DQUOT_PREALLOC_SPACE(struct inode *inode, qsize_t nr)
+static inline int dquot_disable(struct super_block *sb, int type,
+ unsigned int flags)
{
- 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)
+static inline int dquot_suspend(struct super_block *sb, int type)
{
- inode_add_bytes(inode, nr);
return 0;
}
-static inline int DQUOT_ALLOC_SPACE(struct inode *inode, qsize_t nr)
+static inline int dquot_resume(struct super_block *sb, int type)
{
- 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)
+#define dquot_file_open generic_file_open
+
+#endif /* CONFIG_QUOTA */
+
+static inline int dquot_alloc_space_nodirty(struct inode *inode, qsize_t nr)
{
- inode_sub_bytes(inode, nr);
+ return __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN);
}
-static inline void DQUOT_FREE_SPACE(struct inode *inode, qsize_t nr)
+static inline void dquot_alloc_space_nofail(struct inode *inode, qsize_t nr)
{
- DQUOT_FREE_SPACE_NODIRTY(inode, nr);
+ __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN|DQUOT_SPACE_NOFAIL);
mark_inode_dirty(inode);
-}
+}
-#endif /* CONFIG_QUOTA */
+static inline int dquot_alloc_space(struct inode *inode, qsize_t nr)
+{
+ int ret;
+
+ ret = dquot_alloc_space_nodirty(inode, nr);
+ if (!ret)
+ mark_inode_dirty(inode);
+ return ret;
+}
+
+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);
+}
+
+static inline int dquot_prealloc_block_nodirty(struct inode *inode, qsize_t nr)
+{
+ return __dquot_alloc_space(inode, nr << inode->i_blkbits, 0);
+}
-#define DQUOT_PREALLOC_BLOCK_NODIRTY(inode, nr) DQUOT_PREALLOC_SPACE_NODIRTY(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
-#define DQUOT_PREALLOC_BLOCK(inode, nr) DQUOT_PREALLOC_SPACE(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
-#define DQUOT_ALLOC_BLOCK_NODIRTY(inode, nr) DQUOT_ALLOC_SPACE_NODIRTY(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
-#define DQUOT_ALLOC_BLOCK(inode, nr) DQUOT_ALLOC_SPACE(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
-#define DQUOT_FREE_BLOCK_NODIRTY(inode, nr) DQUOT_FREE_SPACE_NODIRTY(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
-#define DQUOT_FREE_BLOCK(inode, nr) DQUOT_FREE_SPACE(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
+static inline int dquot_prealloc_block(struct inode *inode, qsize_t nr)
+{
+ int ret;
+
+ ret = dquot_prealloc_block_nodirty(inode, nr);
+ if (!ret)
+ mark_inode_dirty(inode);
+ return ret;
+}
+
+static inline int dquot_reserve_block(struct inode *inode, qsize_t nr)
+{
+ 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)
+{
+ int ret;
+
+ ret = dquot_claim_space_nodirty(inode, nr << inode->i_blkbits);
+ if (!ret)
+ mark_inode_dirty(inode);
+ return ret;
+}
+
+static inline void dquot_free_space_nodirty(struct inode *inode, qsize_t nr)
+{
+ __dquot_free_space(inode, nr, 0);
+}
+
+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_block_nodirty(struct inode *inode, qsize_t nr)
+{
+ dquot_free_space_nodirty(inode, nr << inode->i_blkbits);
+}
+
+static inline void dquot_free_block(struct inode *inode, qsize_t nr)
+{
+ dquot_free_space(inode, nr << inode->i_blkbits);
+}
+
+static inline void dquot_release_reservation_block(struct inode *inode,
+ qsize_t nr)
+{
+ __dquot_free_space(inode, nr << inode->i_blkbits, DQUOT_SPACE_RESERVE);
+}
#endif /* _LINUX_QUOTAOPS_ */
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