1 /* SPDX-License-Identifier: GPL-2.0 */
8 #include "quota_types.h"
10 #include <linux/seqlock.h>
11 #include <linux/stat.h>
14 * Two-state lock - can be taken for add or block - both states are shared,
15 * like read side of rwsem, but conflict with other state:
17 struct pagecache_lock {
19 wait_queue_head_t wait;
22 static inline void pagecache_lock_init(struct pagecache_lock *lock)
24 atomic_long_set(&lock->v, 0);
25 init_waitqueue_head(&lock->wait);
28 void bch2_pagecache_add_put(struct pagecache_lock *);
29 bool bch2_pagecache_add_tryget(struct pagecache_lock *);
30 void bch2_pagecache_add_get(struct pagecache_lock *);
31 void bch2_pagecache_block_put(struct pagecache_lock *);
32 void bch2_pagecache_block_get(struct pagecache_lock *);
34 struct bch_inode_info {
36 unsigned long ei_flags;
38 struct mutex ei_update_lock;
40 u64 ei_quota_reserved;
41 unsigned long ei_last_dirtied;
43 struct pagecache_lock ei_pagecache_lock;
45 struct mutex ei_quota_lock;
46 struct bch_qid ei_qid;
48 /* copy of inode in btree: */
49 struct bch_inode_unpacked ei_inode;
53 * Set if we've gotten a btree error for this inode, and thus the vfs inode and
54 * btree inode may be inconsistent:
56 #define EI_INODE_ERROR 0
58 #define to_bch_ei(_inode) \
59 container_of_or_null(_inode, struct bch_inode_info, v)
61 static inline int ptrcmp(void *l, void *r)
66 enum bch_inode_lock_op {
67 INODE_LOCK = (1U << 0),
68 INODE_PAGECACHE_BLOCK = (1U << 1),
69 INODE_UPDATE_LOCK = (1U << 2),
72 #define bch2_lock_inodes(_locks, ...) \
74 struct bch_inode_info *a[] = { NULL, __VA_ARGS__ }; \
77 bubble_sort(&a[1], ARRAY_SIZE(a) - 1, ptrcmp); \
79 for (i = 1; i < ARRAY_SIZE(a); i++) \
80 if (a[i] != a[i - 1]) { \
81 if ((_locks) & INODE_LOCK) \
82 down_write_nested(&a[i]->v.i_rwsem, i); \
83 if ((_locks) & INODE_PAGECACHE_BLOCK) \
84 bch2_pagecache_block_get(&a[i]->ei_pagecache_lock);\
85 if ((_locks) & INODE_UPDATE_LOCK) \
86 mutex_lock_nested(&a[i]->ei_update_lock, i);\
90 #define bch2_unlock_inodes(_locks, ...) \
92 struct bch_inode_info *a[] = { NULL, __VA_ARGS__ }; \
95 bubble_sort(&a[1], ARRAY_SIZE(a) - 1, ptrcmp); \
97 for (i = 1; i < ARRAY_SIZE(a); i++) \
98 if (a[i] != a[i - 1]) { \
99 if ((_locks) & INODE_LOCK) \
100 up_write(&a[i]->v.i_rwsem); \
101 if ((_locks) & INODE_PAGECACHE_BLOCK) \
102 bch2_pagecache_block_put(&a[i]->ei_pagecache_lock);\
103 if ((_locks) & INODE_UPDATE_LOCK) \
104 mutex_unlock(&a[i]->ei_update_lock); \
108 static inline struct bch_inode_info *file_bch_inode(struct file *file)
110 return to_bch_ei(file_inode(file));
113 static inline bool inode_attr_changing(struct bch_inode_info *dir,
114 struct bch_inode_info *inode,
115 enum inode_opt_id id)
117 return !(inode->ei_inode.bi_fields_set & (1 << id)) &&
118 bch2_inode_opt_get(&dir->ei_inode, id) !=
119 bch2_inode_opt_get(&inode->ei_inode, id);
122 static inline bool inode_attrs_changing(struct bch_inode_info *dir,
123 struct bch_inode_info *inode)
127 for (id = 0; id < Inode_opt_nr; id++)
128 if (inode_attr_changing(dir, inode, id))
134 struct bch_inode_unpacked;
136 #ifndef NO_BCACHEFS_FS
138 int bch2_fs_quota_transfer(struct bch_fs *,
139 struct bch_inode_info *,
142 enum quota_acct_mode);
144 static inline int bch2_set_projid(struct bch_fs *c,
145 struct bch_inode_info *inode,
148 struct bch_qid qid = inode->ei_qid;
150 qid.q[QTYP_PRJ] = projid;
152 return bch2_fs_quota_transfer(c, inode, qid,
154 KEY_TYPE_QUOTA_PREALLOC);
157 struct inode *bch2_vfs_inode_get(struct bch_fs *, u64);
159 /* returns 0 if we want to do the update, or error is passed up */
160 typedef int (*inode_set_fn)(struct bch_inode_info *,
161 struct bch_inode_unpacked *, void *);
163 void bch2_inode_update_after_write(struct bch_fs *,
164 struct bch_inode_info *,
165 struct bch_inode_unpacked *,
167 int __must_check bch2_write_inode(struct bch_fs *, struct bch_inode_info *,
168 inode_set_fn, void *, unsigned);
170 void bch2_vfs_exit(void);
171 int bch2_vfs_init(void);
175 static inline void bch2_vfs_exit(void) {}
176 static inline int bch2_vfs_init(void) { return 0; }
178 #endif /* NO_BCACHEFS_FS */
180 #endif /* _BCACHEFS_FS_H */