1 /* SPDX-License-Identifier: GPL-2.0 */
8 #include "quota_types.h"
9 #include "two_state_shared_lock.h"
11 #include <linux/seqlock.h>
12 #include <linux/stat.h>
14 struct bch_inode_info {
16 unsigned long ei_flags;
18 struct mutex ei_update_lock;
19 u64 ei_quota_reserved;
20 unsigned long ei_last_dirtied;
21 two_state_lock_t ei_pagecache_lock;
23 struct mutex ei_quota_lock;
24 struct bch_qid ei_qid;
29 * When we've been doing nocow writes we'll need to issue flushes to the
30 * underlying block devices
32 * XXX: a device may have had a flush issued by some other codepath. It
33 * would be better to keep for each device a sequence number that's
34 * incremented when we isusue a cache flush, and track here the sequence
35 * number that needs flushing.
37 struct bch_devs_mask ei_devs_need_flush;
39 /* copy of inode in btree: */
40 struct bch_inode_unpacked ei_inode;
43 #define bch2_pagecache_add_put(i) bch2_two_state_unlock(&i->ei_pagecache_lock, 0)
44 #define bch2_pagecache_add_tryget(i) bch2_two_state_trylock(&i->ei_pagecache_lock, 0)
45 #define bch2_pagecache_add_get(i) bch2_two_state_lock(&i->ei_pagecache_lock, 0)
47 #define bch2_pagecache_block_put(i) bch2_two_state_unlock(&i->ei_pagecache_lock, 1)
48 #define bch2_pagecache_block_get(i) bch2_two_state_lock(&i->ei_pagecache_lock, 1)
50 static inline subvol_inum inode_inum(struct bch_inode_info *inode)
52 return (subvol_inum) {
53 .subvol = inode->ei_subvol,
54 .inum = inode->ei_inode.bi_inum,
59 * Set if we've gotten a btree error for this inode, and thus the vfs inode and
60 * btree inode may be inconsistent:
62 #define EI_INODE_ERROR 0
65 * Set in the inode is in a snapshot subvolume - we don't do quota accounting in
68 #define EI_INODE_SNAPSHOT 1
70 #define to_bch_ei(_inode) \
71 container_of_or_null(_inode, struct bch_inode_info, v)
73 static inline int ptrcmp(void *l, void *r)
78 enum bch_inode_lock_op {
79 INODE_LOCK = (1U << 0),
80 INODE_PAGECACHE_BLOCK = (1U << 1),
81 INODE_UPDATE_LOCK = (1U << 2),
84 #define bch2_lock_inodes(_locks, ...) \
86 struct bch_inode_info *a[] = { NULL, __VA_ARGS__ }; \
89 bubble_sort(&a[1], ARRAY_SIZE(a) - 1, ptrcmp); \
91 for (i = 1; i < ARRAY_SIZE(a); i++) \
92 if (a[i] != a[i - 1]) { \
93 if ((_locks) & INODE_LOCK) \
94 down_write_nested(&a[i]->v.i_rwsem, i); \
95 if ((_locks) & INODE_PAGECACHE_BLOCK) \
96 bch2_pagecache_block_get(a[i]);\
97 if ((_locks) & INODE_UPDATE_LOCK) \
98 mutex_lock_nested(&a[i]->ei_update_lock, i);\
102 #define bch2_unlock_inodes(_locks, ...) \
104 struct bch_inode_info *a[] = { NULL, __VA_ARGS__ }; \
107 bubble_sort(&a[1], ARRAY_SIZE(a) - 1, ptrcmp); \
109 for (i = 1; i < ARRAY_SIZE(a); i++) \
110 if (a[i] != a[i - 1]) { \
111 if ((_locks) & INODE_LOCK) \
112 up_write(&a[i]->v.i_rwsem); \
113 if ((_locks) & INODE_PAGECACHE_BLOCK) \
114 bch2_pagecache_block_put(a[i]);\
115 if ((_locks) & INODE_UPDATE_LOCK) \
116 mutex_unlock(&a[i]->ei_update_lock); \
120 static inline struct bch_inode_info *file_bch_inode(struct file *file)
122 return to_bch_ei(file_inode(file));
125 static inline bool inode_attr_changing(struct bch_inode_info *dir,
126 struct bch_inode_info *inode,
127 enum inode_opt_id id)
129 return !(inode->ei_inode.bi_fields_set & (1 << id)) &&
130 bch2_inode_opt_get(&dir->ei_inode, id) !=
131 bch2_inode_opt_get(&inode->ei_inode, id);
134 static inline bool inode_attrs_changing(struct bch_inode_info *dir,
135 struct bch_inode_info *inode)
139 for (id = 0; id < Inode_opt_nr; id++)
140 if (inode_attr_changing(dir, inode, id))
146 struct bch_inode_unpacked;
148 #ifndef NO_BCACHEFS_FS
150 struct bch_inode_info *
151 __bch2_create(struct user_namespace *, struct bch_inode_info *,
152 struct dentry *, umode_t, dev_t, subvol_inum, unsigned);
154 int bch2_fs_quota_transfer(struct bch_fs *,
155 struct bch_inode_info *,
158 enum quota_acct_mode);
160 static inline int bch2_set_projid(struct bch_fs *c,
161 struct bch_inode_info *inode,
164 struct bch_qid qid = inode->ei_qid;
166 qid.q[QTYP_PRJ] = projid;
168 return bch2_fs_quota_transfer(c, inode, qid,
170 KEY_TYPE_QUOTA_PREALLOC);
173 struct inode *bch2_vfs_inode_get(struct bch_fs *, subvol_inum);
175 /* returns 0 if we want to do the update, or error is passed up */
176 typedef int (*inode_set_fn)(struct bch_inode_info *,
177 struct bch_inode_unpacked *, void *);
179 void bch2_inode_update_after_write(struct btree_trans *,
180 struct bch_inode_info *,
181 struct bch_inode_unpacked *,
183 int __must_check bch2_write_inode(struct bch_fs *, struct bch_inode_info *,
184 inode_set_fn, void *, unsigned);
186 int bch2_setattr_nonsize(struct user_namespace *,
187 struct bch_inode_info *,
189 int __bch2_unlink(struct inode *, struct dentry *, bool);
191 void bch2_evict_subvolume_inodes(struct bch_fs *, snapshot_id_list *);
193 void bch2_vfs_exit(void);
194 int bch2_vfs_init(void);
198 static inline void bch2_evict_subvolume_inodes(struct bch_fs *c,
199 snapshot_id_list *s) {}
200 static inline void bch2_vfs_exit(void) {}
201 static inline int bch2_vfs_init(void) { return 0; }
203 #endif /* NO_BCACHEFS_FS */
205 #endif /* _BCACHEFS_FS_H */