quotaops.h
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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>
- *
- * Version: $Id: quotaops.h,v 1.2 1998/01/15 16:22:26 ecd Exp $
- *
- */
- #ifndef _LINUX_QUOTAOPS_
- #define _LINUX_QUOTAOPS_
- #include <linux/config.h>
- #include <linux/smp_lock.h>
- #if defined(CONFIG_QUOTA)
- #include <linux/fs.h>
- /*
- * declaration of quota_function calls in kernel.
- */
- extern void dquot_initialize(struct inode *inode, short type);
- extern void dquot_drop(struct inode *inode);
- extern int quota_off(struct super_block *sb, short type);
- extern int sync_dquots(kdev_t dev, short type);
- extern int dquot_alloc_block(struct inode *inode, unsigned long number, char prealloc);
- extern int dquot_alloc_inode(const struct inode *inode, unsigned long number);
- extern void dquot_free_block(struct inode *inode, unsigned long number);
- extern void dquot_free_inode(const struct inode *inode, unsigned long number);
- extern int dquot_transfer(struct inode *inode, struct iattr *iattr);
- /*
- * Operations supported for diskquotas.
- */
- #define sb_any_quota_enabled(sb) ((sb)->s_dquot.flags & (DQUOT_USR_ENABLED | DQUOT_GRP_ENABLED))
- static __inline__ void DQUOT_INIT(struct inode *inode)
- {
- if (!inode->i_sb)
- BUG();
- lock_kernel();
- if (sb_any_quota_enabled(inode->i_sb) && !IS_NOQUOTA(inode))
- inode->i_sb->dq_op->initialize(inode, -1);
- unlock_kernel();
- }
- static __inline__ void DQUOT_DROP(struct inode *inode)
- {
- lock_kernel();
- if (IS_QUOTAINIT(inode)) {
- if (!inode->i_sb)
- BUG();
- inode->i_sb->dq_op->drop(inode); /* Ops must be set when there's any quota... */
- }
- unlock_kernel();
- }
- static __inline__ int DQUOT_PREALLOC_BLOCK_NODIRTY(struct inode *inode, int nr)
- {
- lock_kernel();
- if (sb_any_quota_enabled(inode->i_sb)) {
- /* Number of used blocks is updated in alloc_block() */
- if (inode->i_sb->dq_op->alloc_block(inode, fs_to_dq_blocks(nr, inode->i_sb->s_blocksize), 1) == NO_QUOTA) {
- unlock_kernel();
- return 1;
- }
- }
- else
- inode->i_blocks += nr << (inode->i_sb->s_blocksize_bits - 9);
- unlock_kernel();
- return 0;
- }
- static __inline__ int DQUOT_PREALLOC_BLOCK(struct inode *inode, int nr)
- {
- int ret;
- if (!(ret = DQUOT_PREALLOC_BLOCK_NODIRTY(inode, nr)))
- mark_inode_dirty(inode);
- return ret;
- }
- static __inline__ int DQUOT_ALLOC_BLOCK_NODIRTY(struct inode *inode, int nr)
- {
- lock_kernel();
- if (sb_any_quota_enabled(inode->i_sb)) {
- /* Number of used blocks is updated in alloc_block() */
- if (inode->i_sb->dq_op->alloc_block(inode, fs_to_dq_blocks(nr, inode->i_sb->s_blocksize), 0) == NO_QUOTA) {
- unlock_kernel();
- return 1;
- }
- }
- else
- inode->i_blocks += nr << (inode->i_sb->s_blocksize_bits - 9);
- unlock_kernel();
- return 0;
- }
- static __inline__ int DQUOT_ALLOC_BLOCK(struct inode *inode, int nr)
- {
- int ret;
- if (!(ret = DQUOT_ALLOC_BLOCK_NODIRTY(inode, nr)))
- mark_inode_dirty(inode);
- return ret;
- }
- static __inline__ int DQUOT_ALLOC_INODE(struct inode *inode)
- {
- lock_kernel();
- if (sb_any_quota_enabled(inode->i_sb)) {
- DQUOT_INIT(inode);
- if (inode->i_sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA) {
- unlock_kernel();
- return 1;
- }
- }
- unlock_kernel();
- return 0;
- }
- static __inline__ void DQUOT_FREE_BLOCK_NODIRTY(struct inode *inode, int nr)
- {
- lock_kernel();
- if (sb_any_quota_enabled(inode->i_sb))
- inode->i_sb->dq_op->free_block(inode, fs_to_dq_blocks(nr, inode->i_sb->s_blocksize));
- else
- inode->i_blocks -= nr << (inode->i_sb->s_blocksize_bits - 9);
- unlock_kernel();
- }
- static __inline__ void DQUOT_FREE_BLOCK(struct inode *inode, int nr)
- {
- DQUOT_FREE_BLOCK_NODIRTY(inode, nr);
- mark_inode_dirty(inode);
- }
- static __inline__ void DQUOT_FREE_INODE(struct inode *inode)
- {
- lock_kernel();
- if (sb_any_quota_enabled(inode->i_sb))
- inode->i_sb->dq_op->free_inode(inode, 1);
- unlock_kernel();
- }
- static __inline__ int DQUOT_TRANSFER(struct inode *inode, struct iattr *iattr)
- {
- lock_kernel();
- 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) {
- unlock_kernel();
- return 1;
- }
- }
- unlock_kernel();
- return 0;
- }
- #define DQUOT_SYNC(dev) sync_dquots(dev, -1)
- #define DQUOT_OFF(sb) quota_off(sb, -1)
- #else
- /*
- * NO-OP when quota not configured.
- */
- #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(dev) do { } while(0)
- #define DQUOT_OFF(sb) do { } while(0)
- #define DQUOT_TRANSFER(inode, iattr) (0)
- extern __inline__ int DQUOT_PREALLOC_BLOCK_NODIRTY(struct inode *inode, int nr)
- {
- lock_kernel();
- inode->i_blocks += nr << (inode->i_sb->s_blocksize_bits - 9);
- unlock_kernel();
- return 0;
- }
- extern __inline__ int DQUOT_PREALLOC_BLOCK(struct inode *inode, int nr)
- {
- DQUOT_PREALLOC_BLOCK_NODIRTY(inode, nr);
- mark_inode_dirty(inode);
- return 0;
- }
- extern __inline__ int DQUOT_ALLOC_BLOCK_NODIRTY(struct inode *inode, int nr)
- {
- lock_kernel();
- inode->i_blocks += nr << (inode->i_sb->s_blocksize_bits - 9);
- unlock_kernel();
- return 0;
- }
- extern __inline__ int DQUOT_ALLOC_BLOCK(struct inode *inode, int nr)
- {
- DQUOT_ALLOC_BLOCK_NODIRTY(inode, nr);
- mark_inode_dirty(inode);
- return 0;
- }
- extern __inline__ void DQUOT_FREE_BLOCK_NODIRTY(struct inode *inode, int nr)
- {
- lock_kernel();
- inode->i_blocks -= nr << (inode->i_sb->s_blocksize_bits - 9);
- unlock_kernel();
- }
- extern __inline__ void DQUOT_FREE_BLOCK(struct inode *inode, int nr)
- {
- DQUOT_FREE_BLOCK_NODIRTY(inode, nr);
- mark_inode_dirty(inode);
- }
- #endif /* CONFIG_QUOTA */
- #endif /* _LINUX_QUOTAOPS_ */