Commit | Line | Data |
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9e33d69f JK |
1 | /* |
2 | * quota.h for OCFS2 | |
3 | * | |
4 | * On disk quota structures for local and global quota file, in-memory | |
5 | * structures. | |
6 | * | |
7 | */ | |
8 | ||
9 | #ifndef _OCFS2_QUOTA_H | |
10 | #define _OCFS2_QUOTA_H | |
11 | ||
12 | #include <linux/types.h> | |
13 | #include <linux/slab.h> | |
14 | #include <linux/quota.h> | |
15 | #include <linux/list.h> | |
16 | #include <linux/dqblk_qtree.h> | |
17 | ||
18 | #include "ocfs2.h" | |
19 | ||
20 | /* Common stuff */ | |
21 | /* id number of quota format */ | |
22 | #define QFMT_OCFS2 3 | |
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 | struct ocfs2_quota_chunk *dq_chunk; /* Chunk dquot is in */ | |
31 | unsigned int dq_use_count; /* Number of nodes having reference to this entry in global quota file */ | |
32 | s64 dq_origspace; /* Last globally synced space usage */ | |
33 | s64 dq_originodes; /* Last globally synced inode usage */ | |
34 | }; | |
35 | ||
2205363d JK |
36 | /* Description of one chunk to recover in memory */ |
37 | struct ocfs2_recovery_chunk { | |
38 | struct list_head rc_list; /* List of chunks */ | |
39 | int rc_chunk; /* Chunk number */ | |
40 | unsigned long *rc_bitmap; /* Bitmap of entries to recover */ | |
41 | }; | |
42 | ||
43 | struct ocfs2_quota_recovery { | |
44 | struct list_head r_list[MAXQUOTAS]; /* List of chunks to recover */ | |
45 | }; | |
46 | ||
9e33d69f JK |
47 | /* In-memory structure with quota header information */ |
48 | struct ocfs2_mem_dqinfo { | |
49 | unsigned int dqi_type; /* Quota type this structure describes */ | |
50 | unsigned int dqi_chunks; /* Number of chunks in local quota file */ | |
51 | unsigned int dqi_blocks; /* Number of blocks allocated for local quota file */ | |
52 | unsigned int dqi_syncms; /* How often should we sync with other nodes */ | |
171bf93c | 53 | unsigned int dqi_syncjiff; /* Precomputed dqi_syncms in jiffies */ |
9e33d69f JK |
54 | struct list_head dqi_chunk; /* List of chunks */ |
55 | struct inode *dqi_gqinode; /* Global quota file inode */ | |
56 | struct ocfs2_lock_res dqi_gqlock; /* Lock protecting quota information structure */ | |
57 | struct buffer_head *dqi_gqi_bh; /* Buffer head with global quota file inode - set only if inode lock is obtained */ | |
58 | int dqi_gqi_count; /* Number of holders of dqi_gqi_bh */ | |
59 | struct buffer_head *dqi_lqi_bh; /* Buffer head with local quota file inode */ | |
60 | struct buffer_head *dqi_ibh; /* Buffer with information header */ | |
61 | struct qtree_mem_dqinfo dqi_gi; /* Info about global file */ | |
171bf93c | 62 | struct delayed_work dqi_sync_work; /* Work for syncing dquots */ |
2205363d JK |
63 | struct ocfs2_quota_recovery *dqi_rec; /* Pointer to recovery |
64 | * information, in case we | |
65 | * enable quotas on file | |
66 | * needing it */ | |
9e33d69f JK |
67 | }; |
68 | ||
69 | static inline struct ocfs2_dquot *OCFS2_DQUOT(struct dquot *dquot) | |
70 | { | |
71 | return container_of(dquot, struct ocfs2_dquot, dq_dquot); | |
72 | } | |
73 | ||
74 | struct ocfs2_quota_chunk { | |
75 | struct list_head qc_chunk; /* List of quotafile chunks */ | |
76 | int qc_num; /* Number of quota chunk */ | |
77 | struct buffer_head *qc_headerbh; /* Buffer head with chunk header */ | |
78 | }; | |
79 | ||
80 | extern struct kmem_cache *ocfs2_dquot_cachep; | |
81 | extern struct kmem_cache *ocfs2_qf_chunk_cachep; | |
82 | ||
83 | extern struct qtree_fmt_operations ocfs2_global_ops; | |
84 | ||
2205363d JK |
85 | struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery( |
86 | struct ocfs2_super *osb, int slot_num); | |
87 | int ocfs2_finish_quota_recovery(struct ocfs2_super *osb, | |
88 | struct ocfs2_quota_recovery *rec, | |
89 | int slot_num); | |
90 | void ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec); | |
9e33d69f JK |
91 | ssize_t ocfs2_quota_read(struct super_block *sb, int type, char *data, |
92 | size_t len, loff_t off); | |
93 | ssize_t ocfs2_quota_write(struct super_block *sb, int type, | |
94 | const char *data, size_t len, loff_t off); | |
95 | int ocfs2_global_read_info(struct super_block *sb, int type); | |
96 | int ocfs2_global_write_info(struct super_block *sb, int type); | |
97 | int ocfs2_global_read_dquot(struct dquot *dquot); | |
98 | int __ocfs2_sync_dquot(struct dquot *dquot, int freeing); | |
99 | static inline int ocfs2_sync_dquot(struct dquot *dquot) | |
100 | { | |
101 | return __ocfs2_sync_dquot(dquot, 0); | |
102 | } | |
103 | static inline int ocfs2_global_release_dquot(struct dquot *dquot) | |
104 | { | |
105 | return __ocfs2_sync_dquot(dquot, 1); | |
106 | } | |
107 | ||
108 | int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex); | |
109 | void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex); | |
85eb8b73 JB |
110 | int ocfs2_read_quota_block(struct inode *inode, u64 v_block, |
111 | struct buffer_head **bh); | |
9e33d69f JK |
112 | |
113 | extern struct dquot_operations ocfs2_quota_operations; | |
114 | extern struct quota_format_type ocfs2_quota_format; | |
115 | ||
171bf93c MF |
116 | int ocfs2_quota_setup(void); |
117 | void ocfs2_quota_shutdown(void); | |
118 | ||
9e33d69f | 119 | #endif /* _OCFS2_QUOTA_H */ |