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Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +01001/* SPDX-License-Identifier: GPL-2.0 */
Jan Kara9e33d692008-08-25 19:56:50 +02002/*
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
Jan Kara52362812014-09-10 21:06:39 +020021/* Number of quota types we support */
22#define OCFS2_MAXQUOTAS 2
23
Jan Kara9e33d692008-08-25 19:56:50 +020024/*
25 * In-memory structures
26 */
27struct ocfs2_dquot {
28 struct dquot dq_dquot; /* Generic VFS dquot */
29 loff_t dq_local_off; /* Offset in the local quota file */
Jan Karaf64dd442010-04-28 00:22:30 +020030 u64 dq_local_phys_blk; /* Physical block carrying quota structure */
Jan Kara9e33d692008-08-25 19:56:50 +020031 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 */
Jan Karae3a767b2014-04-03 14:46:56 -070035 struct llist_node list; /* Member of list of dquots to drop */
Jan Kara9e33d692008-08-25 19:56:50 +020036};
37
Jan Kara22053632008-10-20 23:50:38 +020038/* Description of one chunk to recover in memory */
39struct 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
45struct ocfs2_quota_recovery {
Jan Kara52362812014-09-10 21:06:39 +020046 struct list_head r_list[OCFS2_MAXQUOTAS]; /* List of chunks to recover */
Jan Kara22053632008-10-20 23:50:38 +020047};
48
Jan Kara9e33d692008-08-25 19:56:50 +020049/* In-memory structure with quota header information */
50struct ocfs2_mem_dqinfo {
51 unsigned int dqi_type; /* Quota type this structure describes */
Jan Kara96827ad2014-11-19 10:41:41 +010052 unsigned int dqi_flags; /* Flags OLQF_* */
Jan Kara9e33d692008-08-25 19:56:50 +020053 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 */
Jan Karaae4f6ef2010-04-28 19:04:29 +020061 u64 dqi_giblk; /* Number of block with global information header */
Jan Kara9e33d692008-08-25 19:56:50 +020062 struct buffer_head *dqi_lqi_bh; /* Buffer head with local quota file inode */
Jan Karaae4f6ef2010-04-28 19:04:29 +020063 struct buffer_head *dqi_libh; /* Buffer with local information header */
Jan Kara9e33d692008-08-25 19:56:50 +020064 struct qtree_mem_dqinfo dqi_gi; /* Info about global file */
Mark Fasheh171bf932008-10-20 15:36:47 +020065 struct delayed_work dqi_sync_work; /* Work for syncing dquots */
Jan Kara22053632008-10-20 23:50:38 +020066 struct ocfs2_quota_recovery *dqi_rec; /* Pointer to recovery
67 * information, in case we
68 * enable quotas on file
69 * needing it */
Jan Kara9e33d692008-08-25 19:56:50 +020070};
71
72static inline struct ocfs2_dquot *OCFS2_DQUOT(struct dquot *dquot)
73{
74 return container_of(dquot, struct ocfs2_dquot, dq_dquot);
75}
76
77struct 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 *qc_headerbh; /* Buffer head with chunk header */
81};
82
83extern struct kmem_cache *ocfs2_dquot_cachep;
84extern struct kmem_cache *ocfs2_qf_chunk_cachep;
85
Julia Lawalld1b98c22016-01-01 08:53:37 +010086extern const struct qtree_fmt_operations ocfs2_global_ops;
Jan Kara9e33d692008-08-25 19:56:50 +020087
Jan Kara22053632008-10-20 23:50:38 +020088struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery(
89 struct ocfs2_super *osb, int slot_num);
90int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
91 struct ocfs2_quota_recovery *rec,
92 int slot_num);
93void ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec);
Jan Kara9e33d692008-08-25 19:56:50 +020094ssize_t ocfs2_quota_read(struct super_block *sb, int type, char *data,
95 size_t len, loff_t off);
96ssize_t ocfs2_quota_write(struct super_block *sb, int type,
97 const char *data, size_t len, loff_t off);
98int ocfs2_global_read_info(struct super_block *sb, int type);
99int ocfs2_global_write_info(struct super_block *sb, int type);
100int ocfs2_global_read_dquot(struct dquot *dquot);
101int __ocfs2_sync_dquot(struct dquot *dquot, int freeing);
102static inline int ocfs2_sync_dquot(struct dquot *dquot)
103{
104 return __ocfs2_sync_dquot(dquot, 0);
105}
106static inline int ocfs2_global_release_dquot(struct dquot *dquot)
107{
108 return __ocfs2_sync_dquot(dquot, 1);
109}
110
111int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex);
112void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex);
Jan Karafb8dd8d2010-03-31 16:25:37 +0200113int ocfs2_validate_quota_block(struct super_block *sb, struct buffer_head *bh);
Jan Karaf64dd442010-04-28 00:22:30 +0200114int ocfs2_read_quota_phys_block(struct inode *inode, u64 p_block,
115 struct buffer_head **bh);
Jan Karafb8dd8d2010-03-31 16:25:37 +0200116int ocfs2_create_local_dquot(struct dquot *dquot);
117int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot);
Jan Kara741e1282010-05-13 18:05:15 +0200118int ocfs2_local_write_dquot(struct dquot *dquot);
Jan Karae3a767b2014-04-03 14:46:56 -0700119void ocfs2_drop_dquot_refs(struct work_struct *work);
Jan Kara9e33d692008-08-25 19:56:50 +0200120
Alexey Dobriyan61e225d2009-09-21 17:01:08 -0700121extern const struct dquot_operations ocfs2_quota_operations;
Jan Kara9e33d692008-08-25 19:56:50 +0200122extern struct quota_format_type ocfs2_quota_format;
123
Jan Kara9e33d692008-08-25 19:56:50 +0200124#endif /* _OCFS2_QUOTA_H */