1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | /* |
3 | * quota.h for OCFS2 |
4 | * |
5 | * On disk quota structures for local and global quota file, in-memory |
6 | * structures. |
7 | * |
8 | */ |
9 | |
10 | #ifndef _OCFS2_QUOTA_H |
11 | #define _OCFS2_QUOTA_H |
12 | |
13 | #include <linux/types.h> |
14 | #include <linux/slab.h> |
15 | #include <linux/quota.h> |
16 | #include <linux/list.h> |
17 | #include <linux/dqblk_qtree.h> |
18 | |
19 | #include "ocfs2.h" |
20 | |
21 | /* Number of quota types we support */ |
22 | #define OCFS2_MAXQUOTAS 2 |
23 | |
24 | /* |
25 | * In-memory structures |
26 | */ |
27 | struct ocfs2_dquot { |
28 | struct dquot dq_dquot; /* Generic VFS dquot */ |
29 | loff_t dq_local_off; /* Offset in the local quota file */ |
30 | u64 dq_local_phys_blk; /* Physical block carrying quota structure */ |
31 | struct ocfs2_quota_chunk *dq_chunk; /* Chunk dquot is in */ |
32 | unsigned int dq_use_count; /* Number of nodes having reference to this entry in global quota file */ |
33 | s64 dq_origspace; /* Last globally synced space usage */ |
34 | s64 dq_originodes; /* Last globally synced inode usage */ |
35 | struct llist_node list; /* Member of list of dquots to drop */ |
36 | }; |
37 | |
38 | /* Description of one chunk to recover in memory */ |
39 | struct ocfs2_recovery_chunk { |
40 | struct list_head rc_list; /* List of chunks */ |
41 | int rc_chunk; /* Chunk number */ |
42 | unsigned long *rc_bitmap; /* Bitmap of entries to recover */ |
43 | }; |
44 | |
45 | struct ocfs2_quota_recovery { |
46 | struct list_head r_list[OCFS2_MAXQUOTAS]; /* List of chunks to recover */ |
47 | }; |
48 | |
49 | /* In-memory structure with quota header information */ |
50 | struct ocfs2_mem_dqinfo { |
51 | unsigned int dqi_type; /* Quota type this structure describes */ |
52 | unsigned int dqi_flags; /* Flags OLQF_* */ |
53 | unsigned int dqi_chunks; /* Number of chunks in local quota file */ |
54 | unsigned int dqi_blocks; /* Number of blocks allocated for local quota file */ |
55 | unsigned int dqi_syncms; /* How often should we sync with other nodes */ |
56 | struct list_head dqi_chunk; /* List of chunks */ |
57 | struct inode *dqi_gqinode; /* Global quota file inode */ |
58 | struct ocfs2_lock_res dqi_gqlock; /* Lock protecting quota information structure */ |
59 | struct buffer_head *dqi_gqi_bh; /* Buffer head with global quota file inode - set only if inode lock is obtained */ |
60 | int dqi_gqi_count; /* Number of holders of dqi_gqi_bh */ |
61 | u64 dqi_giblk; /* Number of block with global information header */ |
62 | struct buffer_head *dqi_lqi_bh; /* Buffer head with local quota file inode */ |
63 | struct buffer_head *dqi_libh; /* Buffer with local information header */ |
64 | struct qtree_mem_dqinfo dqi_gi; /* Info about global file */ |
65 | struct delayed_work dqi_sync_work; /* Work for syncing dquots */ |
66 | struct ocfs2_quota_recovery *dqi_rec; /* Pointer to recovery |
67 | * information, in case we |
68 | * enable quotas on file |
69 | * needing it */ |
70 | }; |
71 | |
72 | static inline struct ocfs2_dquot *OCFS2_DQUOT(struct dquot *dquot) |
73 | { |
74 | return container_of(dquot, struct ocfs2_dquot, dq_dquot); |
75 | } |
76 | |
77 | struct ocfs2_quota_chunk { |
78 | struct list_head qc_chunk; /* List of quotafile chunks */ |
79 | int qc_num; /* Number of quota chunk */ |
80 | struct buffer_head *; /* Buffer head with chunk header */ |
81 | }; |
82 | |
83 | extern struct kmem_cache *ocfs2_dquot_cachep; |
84 | extern struct kmem_cache *ocfs2_qf_chunk_cachep; |
85 | |
86 | extern const struct qtree_fmt_operations ocfs2_global_ops; |
87 | |
88 | struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery( |
89 | struct ocfs2_super *osb, int slot_num); |
90 | int ocfs2_finish_quota_recovery(struct ocfs2_super *osb, |
91 | struct ocfs2_quota_recovery *rec, |
92 | int slot_num); |
93 | void ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec); |
94 | ssize_t ocfs2_quota_read(struct super_block *sb, int type, char *data, |
95 | size_t len, loff_t off); |
96 | ssize_t ocfs2_quota_write(struct super_block *sb, int type, |
97 | const char *data, size_t len, loff_t off); |
98 | int ocfs2_global_read_info(struct super_block *sb, int type); |
99 | int ocfs2_global_write_info(struct super_block *sb, int type); |
100 | int ocfs2_global_read_dquot(struct dquot *dquot); |
101 | int __ocfs2_sync_dquot(struct dquot *dquot, int freeing); |
102 | static inline int ocfs2_sync_dquot(struct dquot *dquot) |
103 | { |
104 | return __ocfs2_sync_dquot(dquot, freeing: 0); |
105 | } |
106 | static inline int ocfs2_global_release_dquot(struct dquot *dquot) |
107 | { |
108 | return __ocfs2_sync_dquot(dquot, freeing: 1); |
109 | } |
110 | |
111 | int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex); |
112 | void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex); |
113 | int ocfs2_validate_quota_block(struct super_block *sb, struct buffer_head *bh); |
114 | int ocfs2_read_quota_phys_block(struct inode *inode, u64 p_block, |
115 | struct buffer_head **bh); |
116 | int ocfs2_create_local_dquot(struct dquot *dquot); |
117 | int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot); |
118 | int ocfs2_local_write_dquot(struct dquot *dquot); |
119 | void ocfs2_drop_dquot_refs(struct work_struct *work); |
120 | |
121 | extern const struct dquot_operations ocfs2_quota_operations; |
122 | extern struct quota_format_type ocfs2_quota_format; |
123 | |
124 | #endif /* _OCFS2_QUOTA_H */ |
125 | |