| /* |
| * 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(struct super_block *sb, 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(sb) sync_dquots(sb, -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(sb) 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_ */ |