Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 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 | |
Jan Kara | 5236281 | 2014-09-10 21:06:39 +0200 | [diff] [blame] | 21 | /* Number of quota types we support */ |
| 22 | #define OCFS2_MAXQUOTAS 2 |
| 23 | |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 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 */ |
Jan Kara | f64dd44 | 2010-04-28 00:22:30 +0200 | [diff] [blame] | 30 | u64 dq_local_phys_blk; /* Physical block carrying quota structure */ |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 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 */ |
Jan Kara | e3a767b | 2014-04-03 14:46:56 -0700 | [diff] [blame] | 35 | struct llist_node list; /* Member of list of dquots to drop */ |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 36 | }; |
| 37 | |
Jan Kara | 2205363 | 2008-10-20 23:50:38 +0200 | [diff] [blame] | 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 { |
Jan Kara | 5236281 | 2014-09-10 21:06:39 +0200 | [diff] [blame] | 46 | struct list_head r_list[OCFS2_MAXQUOTAS]; /* List of chunks to recover */ |
Jan Kara | 2205363 | 2008-10-20 23:50:38 +0200 | [diff] [blame] | 47 | }; |
| 48 | |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 49 | /* In-memory structure with quota header information */ |
| 50 | struct ocfs2_mem_dqinfo { |
| 51 | unsigned int dqi_type; /* Quota type this structure describes */ |
Jan Kara | 96827ad | 2014-11-19 10:41:41 +0100 | [diff] [blame] | 52 | unsigned int dqi_flags; /* Flags OLQF_* */ |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 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 */ |
Jan Kara | ae4f6ef | 2010-04-28 19:04:29 +0200 | [diff] [blame] | 61 | u64 dqi_giblk; /* Number of block with global information header */ |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 62 | struct buffer_head *dqi_lqi_bh; /* Buffer head with local quota file inode */ |
Jan Kara | ae4f6ef | 2010-04-28 19:04:29 +0200 | [diff] [blame] | 63 | struct buffer_head *dqi_libh; /* Buffer with local information header */ |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 64 | struct qtree_mem_dqinfo dqi_gi; /* Info about global file */ |
Mark Fasheh | 171bf93 | 2008-10-20 15:36:47 +0200 | [diff] [blame] | 65 | struct delayed_work dqi_sync_work; /* Work for syncing dquots */ |
Jan Kara | 2205363 | 2008-10-20 23:50:38 +0200 | [diff] [blame] | 66 | struct ocfs2_quota_recovery *dqi_rec; /* Pointer to recovery |
| 67 | * information, in case we |
| 68 | * enable quotas on file |
| 69 | * needing it */ |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 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 *qc_headerbh; /* 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 | |
Julia Lawall | d1b98c2 | 2016-01-01 08:53:37 +0100 | [diff] [blame] | 86 | extern const struct qtree_fmt_operations ocfs2_global_ops; |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 87 | |
Jan Kara | 2205363 | 2008-10-20 23:50:38 +0200 | [diff] [blame] | 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); |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 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, 0); |
| 105 | } |
| 106 | static inline int ocfs2_global_release_dquot(struct dquot *dquot) |
| 107 | { |
| 108 | return __ocfs2_sync_dquot(dquot, 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); |
Jan Kara | fb8dd8d | 2010-03-31 16:25:37 +0200 | [diff] [blame] | 113 | int ocfs2_validate_quota_block(struct super_block *sb, struct buffer_head *bh); |
Jan Kara | f64dd44 | 2010-04-28 00:22:30 +0200 | [diff] [blame] | 114 | int ocfs2_read_quota_phys_block(struct inode *inode, u64 p_block, |
| 115 | struct buffer_head **bh); |
Jan Kara | fb8dd8d | 2010-03-31 16:25:37 +0200 | [diff] [blame] | 116 | int ocfs2_create_local_dquot(struct dquot *dquot); |
| 117 | int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot); |
Jan Kara | 741e128 | 2010-05-13 18:05:15 +0200 | [diff] [blame] | 118 | int ocfs2_local_write_dquot(struct dquot *dquot); |
Jan Kara | e3a767b | 2014-04-03 14:46:56 -0700 | [diff] [blame] | 119 | void ocfs2_drop_dquot_refs(struct work_struct *work); |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 120 | |
Alexey Dobriyan | 61e225d | 2009-09-21 17:01:08 -0700 | [diff] [blame] | 121 | extern const struct dquot_operations ocfs2_quota_operations; |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 122 | extern struct quota_format_type ocfs2_quota_format; |
| 123 | |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 124 | #endif /* _OCFS2_QUOTA_H */ |