Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Definitions for diskquota-operations. When diskquota is configured these |
| 3 | * macros expand to the right source-code. |
| 4 | * |
| 5 | * Author: Marco van Wieringen <mvw@planets.elm.net> |
| 6 | * |
| 7 | * Version: $Id: quotaops.h,v 1.2 1998/01/15 16:22:26 ecd Exp $ |
| 8 | * |
| 9 | */ |
| 10 | #ifndef _LINUX_QUOTAOPS_ |
| 11 | #define _LINUX_QUOTAOPS_ |
| 12 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <linux/smp_lock.h> |
| 14 | |
| 15 | #include <linux/fs.h> |
| 16 | |
| 17 | #if defined(CONFIG_QUOTA) |
| 18 | |
| 19 | /* |
| 20 | * declaration of quota_function calls in kernel. |
| 21 | */ |
| 22 | extern void sync_dquots(struct super_block *sb, int type); |
| 23 | |
| 24 | extern int dquot_initialize(struct inode *inode, int type); |
| 25 | extern int dquot_drop(struct inode *inode); |
| 26 | |
| 27 | extern int dquot_alloc_space(struct inode *inode, qsize_t number, int prealloc); |
| 28 | extern int dquot_alloc_inode(const struct inode *inode, unsigned long number); |
| 29 | |
| 30 | extern int dquot_free_space(struct inode *inode, qsize_t number); |
| 31 | extern int dquot_free_inode(const struct inode *inode, unsigned long number); |
| 32 | |
| 33 | extern int dquot_transfer(struct inode *inode, struct iattr *iattr); |
| 34 | extern int dquot_commit(struct dquot *dquot); |
| 35 | extern int dquot_acquire(struct dquot *dquot); |
| 36 | extern int dquot_release(struct dquot *dquot); |
| 37 | extern int dquot_commit_info(struct super_block *sb, int type); |
| 38 | extern int dquot_mark_dquot_dirty(struct dquot *dquot); |
| 39 | |
Jan Kara | 0ff5af8 | 2008-04-28 02:14:33 -0700 | [diff] [blame^] | 40 | extern int vfs_quota_on(struct super_block *sb, int type, int format_id, |
| 41 | char *path, int remount); |
Christoph Hellwig | 84de856 | 2005-06-23 00:09:16 -0700 | [diff] [blame] | 42 | extern int vfs_quota_on_mount(struct super_block *sb, char *qf_name, |
| 43 | int format_id, int type); |
Jan Kara | 0ff5af8 | 2008-04-28 02:14:33 -0700 | [diff] [blame^] | 44 | extern int vfs_quota_off(struct super_block *sb, int type, int remount); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | extern int vfs_quota_sync(struct super_block *sb, int type); |
| 46 | extern int vfs_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii); |
| 47 | extern int vfs_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii); |
| 48 | extern int vfs_get_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di); |
| 49 | extern int vfs_set_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di); |
| 50 | |
| 51 | /* |
| 52 | * Operations supported for diskquotas. |
| 53 | */ |
| 54 | extern struct dquot_operations dquot_operations; |
| 55 | extern struct quotactl_ops vfs_quotactl_ops; |
| 56 | |
| 57 | #define sb_dquot_ops (&dquot_operations) |
| 58 | #define sb_quotactl_ops (&vfs_quotactl_ops) |
| 59 | |
| 60 | /* It is better to call this function outside of any transaction as it might |
| 61 | * need a lot of space in journal for dquot structure allocation. */ |
Jan Kara | 03f6e92 | 2008-04-28 02:14:32 -0700 | [diff] [blame] | 62 | static inline void DQUOT_INIT(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | { |
| 64 | BUG_ON(!inode->i_sb); |
| 65 | if (sb_any_quota_enabled(inode->i_sb) && !IS_NOQUOTA(inode)) |
| 66 | inode->i_sb->dq_op->initialize(inode, -1); |
| 67 | } |
| 68 | |
| 69 | /* The same as with DQUOT_INIT */ |
Jan Kara | 03f6e92 | 2008-04-28 02:14:32 -0700 | [diff] [blame] | 70 | static inline void DQUOT_DROP(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | { |
| 72 | /* Here we can get arbitrary inode from clear_inode() so we have |
| 73 | * to be careful. OTOH we don't need locking as quota operations |
| 74 | * are allowed to change only at mount time */ |
| 75 | if (!IS_NOQUOTA(inode) && inode->i_sb && inode->i_sb->dq_op |
| 76 | && inode->i_sb->dq_op->drop) { |
| 77 | int cnt; |
| 78 | /* Test before calling to rule out calls from proc and such |
| 79 | * where we are not allowed to block. Note that this is |
| 80 | * actually reliable test even without the lock - the caller |
| 81 | * must assure that nobody can come after the DQUOT_DROP and |
| 82 | * add quota pointers back anyway */ |
| 83 | for (cnt = 0; cnt < MAXQUOTAS; cnt++) |
| 84 | if (inode->i_dquot[cnt] != NODQUOT) |
| 85 | break; |
| 86 | if (cnt < MAXQUOTAS) |
| 87 | inode->i_sb->dq_op->drop(inode); |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | /* The following allocation/freeing/transfer functions *must* be called inside |
| 92 | * a transaction (deadlocks possible otherwise) */ |
Jan Kara | 03f6e92 | 2008-04-28 02:14:32 -0700 | [diff] [blame] | 93 | static inline int DQUOT_PREALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | { |
| 95 | if (sb_any_quota_enabled(inode->i_sb)) { |
| 96 | /* Used space is updated in alloc_space() */ |
| 97 | if (inode->i_sb->dq_op->alloc_space(inode, nr, 1) == NO_QUOTA) |
| 98 | return 1; |
| 99 | } |
| 100 | else |
| 101 | inode_add_bytes(inode, nr); |
| 102 | return 0; |
| 103 | } |
| 104 | |
Jan Kara | 03f6e92 | 2008-04-28 02:14:32 -0700 | [diff] [blame] | 105 | static inline int DQUOT_PREALLOC_SPACE(struct inode *inode, qsize_t nr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | { |
| 107 | int ret; |
| 108 | if (!(ret = DQUOT_PREALLOC_SPACE_NODIRTY(inode, nr))) |
| 109 | mark_inode_dirty(inode); |
| 110 | return ret; |
| 111 | } |
| 112 | |
Jan Kara | 03f6e92 | 2008-04-28 02:14:32 -0700 | [diff] [blame] | 113 | static inline int DQUOT_ALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | { |
| 115 | if (sb_any_quota_enabled(inode->i_sb)) { |
| 116 | /* Used space is updated in alloc_space() */ |
| 117 | if (inode->i_sb->dq_op->alloc_space(inode, nr, 0) == NO_QUOTA) |
| 118 | return 1; |
| 119 | } |
| 120 | else |
| 121 | inode_add_bytes(inode, nr); |
| 122 | return 0; |
| 123 | } |
| 124 | |
Jan Kara | 03f6e92 | 2008-04-28 02:14:32 -0700 | [diff] [blame] | 125 | static inline int DQUOT_ALLOC_SPACE(struct inode *inode, qsize_t nr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | { |
| 127 | int ret; |
| 128 | if (!(ret = DQUOT_ALLOC_SPACE_NODIRTY(inode, nr))) |
| 129 | mark_inode_dirty(inode); |
| 130 | return ret; |
| 131 | } |
| 132 | |
Jan Kara | 03f6e92 | 2008-04-28 02:14:32 -0700 | [diff] [blame] | 133 | static inline int DQUOT_ALLOC_INODE(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | { |
| 135 | if (sb_any_quota_enabled(inode->i_sb)) { |
| 136 | DQUOT_INIT(inode); |
| 137 | if (inode->i_sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA) |
| 138 | return 1; |
| 139 | } |
| 140 | return 0; |
| 141 | } |
| 142 | |
Jan Kara | 03f6e92 | 2008-04-28 02:14:32 -0700 | [diff] [blame] | 143 | static inline void DQUOT_FREE_SPACE_NODIRTY(struct inode *inode, qsize_t nr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | { |
| 145 | if (sb_any_quota_enabled(inode->i_sb)) |
| 146 | inode->i_sb->dq_op->free_space(inode, nr); |
| 147 | else |
| 148 | inode_sub_bytes(inode, nr); |
| 149 | } |
| 150 | |
Jan Kara | 03f6e92 | 2008-04-28 02:14:32 -0700 | [diff] [blame] | 151 | static inline void DQUOT_FREE_SPACE(struct inode *inode, qsize_t nr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | { |
| 153 | DQUOT_FREE_SPACE_NODIRTY(inode, nr); |
| 154 | mark_inode_dirty(inode); |
| 155 | } |
| 156 | |
Jan Kara | 03f6e92 | 2008-04-28 02:14:32 -0700 | [diff] [blame] | 157 | static inline void DQUOT_FREE_INODE(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | { |
| 159 | if (sb_any_quota_enabled(inode->i_sb)) |
| 160 | inode->i_sb->dq_op->free_inode(inode, 1); |
| 161 | } |
| 162 | |
Jan Kara | 03f6e92 | 2008-04-28 02:14:32 -0700 | [diff] [blame] | 163 | static inline int DQUOT_TRANSFER(struct inode *inode, struct iattr *iattr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | { |
| 165 | if (sb_any_quota_enabled(inode->i_sb) && !IS_NOQUOTA(inode)) { |
| 166 | DQUOT_INIT(inode); |
| 167 | if (inode->i_sb->dq_op->transfer(inode, iattr) == NO_QUOTA) |
| 168 | return 1; |
| 169 | } |
| 170 | return 0; |
| 171 | } |
| 172 | |
| 173 | /* The following two functions cannot be called inside a transaction */ |
Jan Kara | 03f6e92 | 2008-04-28 02:14:32 -0700 | [diff] [blame] | 174 | static inline void DQUOT_SYNC(struct super_block *sb) |
| 175 | { |
| 176 | sync_dquots(sb, -1); |
| 177 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | |
Jan Kara | 0ff5af8 | 2008-04-28 02:14:33 -0700 | [diff] [blame^] | 179 | static inline int DQUOT_OFF(struct super_block *sb, int remount) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | { |
| 181 | int ret = -ENOSYS; |
| 182 | |
Jan Kara | 0ff5af8 | 2008-04-28 02:14:33 -0700 | [diff] [blame^] | 183 | if (sb->s_qcop && sb->s_qcop->quota_off) |
| 184 | ret = sb->s_qcop->quota_off(sb, -1, remount); |
| 185 | return ret; |
| 186 | } |
| 187 | |
| 188 | static inline int DQUOT_ON_REMOUNT(struct super_block *sb) |
| 189 | { |
| 190 | int cnt; |
| 191 | int ret = 0, err; |
| 192 | |
| 193 | if (!sb->s_qcop || !sb->s_qcop->quota_on) |
| 194 | return -ENOSYS; |
| 195 | for (cnt = 0; cnt < MAXQUOTAS; cnt++) { |
| 196 | err = sb->s_qcop->quota_on(sb, cnt, 0, NULL, 1); |
| 197 | if (err < 0 && !ret) |
| 198 | ret = err; |
| 199 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | return ret; |
| 201 | } |
| 202 | |
| 203 | #else |
| 204 | |
| 205 | /* |
| 206 | * NO-OP when quota not configured. |
| 207 | */ |
| 208 | #define sb_dquot_ops (NULL) |
| 209 | #define sb_quotactl_ops (NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | #define DQUOT_INIT(inode) do { } while(0) |
| 211 | #define DQUOT_DROP(inode) do { } while(0) |
| 212 | #define DQUOT_ALLOC_INODE(inode) (0) |
| 213 | #define DQUOT_FREE_INODE(inode) do { } while(0) |
| 214 | #define DQUOT_SYNC(sb) do { } while(0) |
Jan Kara | 0ff5af8 | 2008-04-28 02:14:33 -0700 | [diff] [blame^] | 215 | #define DQUOT_OFF(sb, remount) (0) |
| 216 | #define DQUOT_ON_REMOUNT(sb) (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | #define DQUOT_TRANSFER(inode, iattr) (0) |
Adrian Bunk | be586ba | 2005-11-07 00:59:35 -0800 | [diff] [blame] | 218 | static inline int DQUOT_PREALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | { |
| 220 | inode_add_bytes(inode, nr); |
| 221 | return 0; |
| 222 | } |
| 223 | |
Adrian Bunk | be586ba | 2005-11-07 00:59:35 -0800 | [diff] [blame] | 224 | static inline int DQUOT_PREALLOC_SPACE(struct inode *inode, qsize_t nr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | { |
| 226 | DQUOT_PREALLOC_SPACE_NODIRTY(inode, nr); |
| 227 | mark_inode_dirty(inode); |
| 228 | return 0; |
| 229 | } |
| 230 | |
Adrian Bunk | be586ba | 2005-11-07 00:59:35 -0800 | [diff] [blame] | 231 | static inline int DQUOT_ALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | { |
| 233 | inode_add_bytes(inode, nr); |
| 234 | return 0; |
| 235 | } |
| 236 | |
Adrian Bunk | be586ba | 2005-11-07 00:59:35 -0800 | [diff] [blame] | 237 | static inline int DQUOT_ALLOC_SPACE(struct inode *inode, qsize_t nr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | { |
| 239 | DQUOT_ALLOC_SPACE_NODIRTY(inode, nr); |
| 240 | mark_inode_dirty(inode); |
| 241 | return 0; |
| 242 | } |
| 243 | |
Adrian Bunk | be586ba | 2005-11-07 00:59:35 -0800 | [diff] [blame] | 244 | static inline void DQUOT_FREE_SPACE_NODIRTY(struct inode *inode, qsize_t nr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | { |
| 246 | inode_sub_bytes(inode, nr); |
| 247 | } |
| 248 | |
Adrian Bunk | be586ba | 2005-11-07 00:59:35 -0800 | [diff] [blame] | 249 | static inline void DQUOT_FREE_SPACE(struct inode *inode, qsize_t nr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | { |
| 251 | DQUOT_FREE_SPACE_NODIRTY(inode, nr); |
| 252 | mark_inode_dirty(inode); |
| 253 | } |
| 254 | |
| 255 | #endif /* CONFIG_QUOTA */ |
| 256 | |
Jan Kara | 03f6e92 | 2008-04-28 02:14:32 -0700 | [diff] [blame] | 257 | static inline int DQUOT_PREALLOC_BLOCK_NODIRTY(struct inode *inode, qsize_t nr) |
| 258 | { |
| 259 | return DQUOT_PREALLOC_SPACE_NODIRTY(inode, |
| 260 | nr << inode->i_sb->s_blocksize_bits); |
| 261 | } |
| 262 | |
| 263 | static inline int DQUOT_PREALLOC_BLOCK(struct inode *inode, qsize_t nr) |
| 264 | { |
| 265 | return DQUOT_PREALLOC_SPACE(inode, |
| 266 | nr << inode->i_sb->s_blocksize_bits); |
| 267 | } |
| 268 | |
| 269 | static inline int DQUOT_ALLOC_BLOCK_NODIRTY(struct inode *inode, qsize_t nr) |
| 270 | { |
| 271 | return DQUOT_ALLOC_SPACE_NODIRTY(inode, |
| 272 | nr << inode->i_sb->s_blocksize_bits); |
| 273 | } |
| 274 | |
| 275 | static inline int DQUOT_ALLOC_BLOCK(struct inode *inode, qsize_t nr) |
| 276 | { |
| 277 | return DQUOT_ALLOC_SPACE(inode, |
| 278 | nr << inode->i_sb->s_blocksize_bits); |
| 279 | } |
| 280 | |
| 281 | static inline void DQUOT_FREE_BLOCK_NODIRTY(struct inode *inode, qsize_t nr) |
| 282 | { |
| 283 | DQUOT_FREE_SPACE_NODIRTY(inode, nr << inode->i_sb->s_blocksize_bits); |
| 284 | } |
| 285 | |
| 286 | static inline void DQUOT_FREE_BLOCK(struct inode *inode, qsize_t nr) |
| 287 | { |
| 288 | DQUOT_FREE_SPACE(inode, nr << inode->i_sb->s_blocksize_bits); |
| 289 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | |
| 291 | #endif /* _LINUX_QUOTAOPS_ */ |