#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.
*/
-void sync_dquots(struct super_block *sb, int type);
+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);
+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 prealloc);
-int dquot_alloc_inode(const struct inode *inode, qsize_t number);
+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_free_space(struct inode *inode, qsize_t number);
-int dquot_free_inode(const struct inode *inode, qsize_t number);
+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_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_on_path(struct super_block *sb, int type, int format_id,
+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 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_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);
+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)
{
* Functions for checking status of quota
*/
-static inline int sb_has_quota_enabled(struct super_block *sb, int type)
+static inline bool sb_has_quota_usage_enabled(struct super_block *sb, int type)
{
- if (type == USRQUOTA)
- return sb_dqopt(sb)->flags & DQUOT_USR_ENABLED;
- return sb_dqopt(sb)->flags & DQUOT_GRP_ENABLED;
+ return sb_dqopt(sb)->flags &
+ dquot_state_flag(DQUOT_USAGE_ENABLED, type);
}
-static inline int sb_any_quota_enabled(struct super_block *sb)
+static inline bool sb_has_quota_limits_enabled(struct super_block *sb, int type)
{
- return sb_has_quota_enabled(sb, USRQUOTA) ||
- sb_has_quota_enabled(sb, GRPQUOTA);
+ 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)
+static inline bool sb_has_quota_suspended(struct super_block *sb, int type)
{
- if (type == USRQUOTA)
- return sb_dqopt(sb)->flags & DQUOT_USR_SUSPENDED;
- return sb_dqopt(sb)->flags & DQUOT_GRP_SUSPENDED;
+ return sb_dqopt(sb)->flags &
+ dquot_state_flag(DQUOT_SUSPENDED, type);
}
-static inline int sb_any_quota_suspended(struct super_block *sb)
+static inline unsigned sb_any_quota_suspended(struct super_block *sb)
{
- return sb_has_quota_suspended(sb, USRQUOTA) ||
- sb_has_quota_suspended(sb, GRPQUOTA);
+ unsigned type, tmsk = 0;
+ for (type = 0; type < MAXQUOTAS; type++)
+ tmsk |= sb_has_quota_suspended(sb, type) << type;
+ return tmsk;
}
-/*
- * 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)
+/* Does kernel know about any quota information for given sb + type? */
+static inline bool sb_has_quota_loaded(struct super_block *sb, int type)
{
- BUG_ON(!inode->i_sb);
- if (sb_any_quota_enabled(inode->i_sb) && !IS_NOQUOTA(inode))
- inode->i_sb->dq_op->initialize(inode, -1);
+ /* Currently if anything is on, then quota usage is on as well */
+ return sb_has_quota_usage_enabled(sb, type);
}
-/* 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)
+static inline unsigned sb_any_quota_loaded(struct super_block *sb)
{
- 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;
+ unsigned type, tmsk = 0;
+ for (type = 0; type < MAXQUOTAS; type++)
+ tmsk |= sb_has_quota_loaded(sb, type) << type;
+ return tmsk;
}
-static inline int vfs_dq_prealloc_space(struct inode *inode, qsize_t nr)
+static inline bool sb_has_quota_active(struct super_block *sb, int type)
{
- int ret;
- if (!(ret = vfs_dq_prealloc_space_nodirty(inode, nr)))
- mark_inode_dirty(inode);
- return ret;
+ return sb_has_quota_loaded(sb, type) &&
+ !sb_has_quota_suspended(sb, type);
}
-static inline int vfs_dq_alloc_space_nodirty(struct inode *inode, qsize_t nr)
+static inline unsigned sb_any_quota_active(struct super_block *sb)
{
- 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;
+ return sb_any_quota_loaded(sb) & ~sb_any_quota_suspended(sb);
}
-static inline int vfs_dq_alloc_space(struct inode *inode, qsize_t nr)
+/*
+ * Operations supported for diskquotas.
+ */
+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)
{
- int ret;
- if (!(ret = vfs_dq_alloc_space_nodirty(inode, nr)))
- mark_inode_dirty(inode);
- return ret;
+ return 0;
}
-static inline int vfs_dq_alloc_inode(struct inode *inode)
+static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type)
{
- if (sb_any_quota_enabled(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)
+static inline int sb_has_quota_suspended(struct super_block *sb, int type)
{
- 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 vfs_dq_free_space(struct inode *inode, qsize_t nr)
+static inline int sb_any_quota_suspended(struct super_block *sb)
{
- vfs_dq_free_space_nodirty(inode, nr);
- mark_inode_dirty(inode);
+ return 0;
}
-static inline void vfs_dq_free_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))
- inode->i_sb->dq_op->free_inode(inode, 1);
+ return 0;
}
-/* The following two functions cannot be called inside a transaction */
-static inline void vfs_dq_sync(struct super_block *sb)
+static inline int sb_any_quota_loaded(struct super_block *sb)
{
- sync_dquots(sb, -1);
+ return 0;
}
-static inline int vfs_dq_off(struct super_block *sb, int remount)
+static inline int sb_has_quota_active(struct super_block *sb, int type)
{
- int ret = -ENOSYS;
-
- if (sb->s_qcop && sb->s_qcop->quota_off)
- ret = sb->s_qcop->quota_off(sb, -1, remount);
- return ret;
+ return 0;
}
-#else
-
-static inline int sb_has_quota_enabled(struct super_block *sb, int type)
+static inline int sb_any_quota_active(struct super_block *sb)
{
return 0;
}
-static inline int sb_any_quota_enabled(struct super_block *sb)
+static inline void dquot_initialize(struct inode *inode)
{
- return 0;
}
-static inline int sb_has_quota_suspended(struct super_block *sb, int type)
+static inline void dquot_drop(struct inode *inode)
{
- return 0;
}
-static inline int sb_any_quota_suspended(struct super_block *sb)
+static inline int dquot_alloc_inode(const struct inode *inode)
{
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 dquot_free_inode(const struct inode *inode)
{
}
-static inline void vfs_dq_drop(struct inode *inode)
+static inline int dquot_transfer(struct inode *inode, struct iattr *iattr)
{
+ return 0;
}
-static inline int vfs_dq_alloc_inode(struct inode *inode)
+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 void vfs_dq_free_inode(struct inode *inode)
+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 void vfs_dq_sync(struct super_block *sb)
+static inline int dquot_claim_space_nodirty(struct inode *inode, qsize_t number)
{
+ inode_add_bytes(inode, number);
+ return 0;
}
-static inline int vfs_dq_off(struct super_block *sb, int remount)
+static inline int dquot_disable(struct super_block *sb, int type,
+ unsigned int flags)
{
return 0;
}
-static inline int vfs_dq_quota_on_remount(struct super_block *sb)
+static inline int dquot_suspend(struct super_block *sb, int type)
{
return 0;
}
-static inline int vfs_dq_transfer(struct inode *inode, struct iattr *iattr)
+static inline int dquot_resume(struct super_block *sb, int type)
{
return 0;
}
-static inline int vfs_dq_prealloc_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_add_bytes(inode, nr);
- return 0;
+ return __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN);
}
-static inline int vfs_dq_prealloc_space(struct inode *inode, qsize_t nr)
+static inline void dquot_alloc_space_nofail(struct inode *inode, qsize_t nr)
{
- vfs_dq_prealloc_space_nodirty(inode, nr);
+ __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN|DQUOT_SPACE_NOFAIL);
mark_inode_dirty(inode);
- return 0;
}
-static inline int vfs_dq_alloc_space_nodirty(struct inode *inode, qsize_t nr)
+static inline int dquot_alloc_space(struct inode *inode, qsize_t nr)
{
- inode_add_bytes(inode, nr);
- return 0;
+ int ret;
+
+ ret = dquot_alloc_space_nodirty(inode, nr);
+ if (!ret)
+ mark_inode_dirty(inode);
+ return ret;
}
-static inline int vfs_dq_alloc_space(struct inode *inode, qsize_t nr)
+static inline int dquot_alloc_block_nodirty(struct inode *inode, qsize_t nr)
{
- vfs_dq_alloc_space_nodirty(inode, nr);
- mark_inode_dirty(inode);
- return 0;
+ return dquot_alloc_space_nodirty(inode, nr << inode->i_blkbits);
}
-static inline void vfs_dq_free_space_nodirty(struct inode *inode, qsize_t nr)
+static inline void dquot_alloc_block_nofail(struct inode *inode, qsize_t nr)
{
- inode_sub_bytes(inode, nr);
+ dquot_alloc_space_nofail(inode, nr << inode->i_blkbits);
}
-static inline void vfs_dq_free_space(struct inode *inode, qsize_t nr)
+static inline int dquot_alloc_block(struct inode *inode, qsize_t nr)
{
- vfs_dq_free_space_nodirty(inode, nr);
- mark_inode_dirty(inode);
-}
+ return dquot_alloc_space(inode, nr << inode->i_blkbits);
+}
-#endif /* CONFIG_QUOTA */
+static inline int dquot_prealloc_block_nodirty(struct inode *inode, qsize_t nr)
+{
+ return __dquot_alloc_space(inode, nr << inode->i_blkbits, 0);
+}
+
+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 vfs_dq_prealloc_block_nodirty(struct inode *inode, qsize_t nr)
+static inline int dquot_reserve_block(struct inode *inode, qsize_t nr)
{
- return vfs_dq_prealloc_space_nodirty(inode,
- nr << inode->i_sb->s_blocksize_bits);
+ return __dquot_alloc_space(inode, nr << inode->i_blkbits,
+ DQUOT_SPACE_WARN|DQUOT_SPACE_RESERVE);
}
-static inline int vfs_dq_prealloc_block(struct inode *inode, qsize_t nr)
+static inline int dquot_claim_block(struct inode *inode, qsize_t nr)
{
- return vfs_dq_prealloc_space(inode,
- nr << inode->i_sb->s_blocksize_bits);
+ int ret;
+
+ ret = dquot_claim_space_nodirty(inode, nr << inode->i_blkbits);
+ if (!ret)
+ mark_inode_dirty(inode);
+ return ret;
}
-static inline int vfs_dq_alloc_block_nodirty(struct inode *inode, qsize_t nr)
+static inline void dquot_free_space_nodirty(struct inode *inode, qsize_t nr)
{
- return vfs_dq_alloc_space_nodirty(inode,
- nr << inode->i_sb->s_blocksize_bits);
+ __dquot_free_space(inode, nr, 0);
}
-static inline int vfs_dq_alloc_block(struct inode *inode, qsize_t nr)
+static inline void dquot_free_space(struct inode *inode, qsize_t nr)
{
- return vfs_dq_alloc_space(inode,
- nr << inode->i_sb->s_blocksize_bits);
+ dquot_free_space_nodirty(inode, nr);
+ mark_inode_dirty(inode);
}
-static inline void vfs_dq_free_block_nodirty(struct inode *inode, qsize_t nr)
+static inline void dquot_free_block_nodirty(struct inode *inode, qsize_t nr)
{
- vfs_dq_free_space_nodirty(inode, nr << inode->i_sb->s_blocksize_bits);
+ dquot_free_space_nodirty(inode, nr << inode->i_blkbits);
}
-static inline void vfs_dq_free_block(struct inode *inode, qsize_t nr)
+static inline void dquot_free_block(struct inode *inode, qsize_t nr)
{
- vfs_dq_free_space(inode, nr << inode->i_sb->s_blocksize_bits);
+ dquot_free_space(inode, nr << inode->i_blkbits);
}
-/*
- * 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)
+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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