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124 lines
4.6 KiB
124 lines
4.6 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* quota.h for OCFS2 |
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* |
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* On disk quota structures for local and global quota file, in-memory |
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* structures. |
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* |
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*/ |
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#ifndef _OCFS2_QUOTA_H |
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#define _OCFS2_QUOTA_H |
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#include <linux/types.h> |
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#include <linux/slab.h> |
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#include <linux/quota.h> |
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#include <linux/list.h> |
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#include <linux/dqblk_qtree.h> |
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#include "ocfs2.h" |
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/* Number of quota types we support */ |
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#define OCFS2_MAXQUOTAS 2 |
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/* |
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* In-memory structures |
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*/ |
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struct ocfs2_dquot { |
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struct dquot dq_dquot; /* Generic VFS dquot */ |
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loff_t dq_local_off; /* Offset in the local quota file */ |
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u64 dq_local_phys_blk; /* Physical block carrying quota structure */ |
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struct ocfs2_quota_chunk *dq_chunk; /* Chunk dquot is in */ |
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unsigned int dq_use_count; /* Number of nodes having reference to this entry in global quota file */ |
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s64 dq_origspace; /* Last globally synced space usage */ |
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s64 dq_originodes; /* Last globally synced inode usage */ |
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struct llist_node list; /* Member of list of dquots to drop */ |
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}; |
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/* Description of one chunk to recover in memory */ |
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struct ocfs2_recovery_chunk { |
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struct list_head rc_list; /* List of chunks */ |
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int rc_chunk; /* Chunk number */ |
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unsigned long *rc_bitmap; /* Bitmap of entries to recover */ |
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}; |
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struct ocfs2_quota_recovery { |
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struct list_head r_list[OCFS2_MAXQUOTAS]; /* List of chunks to recover */ |
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}; |
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/* In-memory structure with quota header information */ |
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struct ocfs2_mem_dqinfo { |
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unsigned int dqi_type; /* Quota type this structure describes */ |
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unsigned int dqi_flags; /* Flags OLQF_* */ |
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unsigned int dqi_chunks; /* Number of chunks in local quota file */ |
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unsigned int dqi_blocks; /* Number of blocks allocated for local quota file */ |
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unsigned int dqi_syncms; /* How often should we sync with other nodes */ |
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struct list_head dqi_chunk; /* List of chunks */ |
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struct inode *dqi_gqinode; /* Global quota file inode */ |
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struct ocfs2_lock_res dqi_gqlock; /* Lock protecting quota information structure */ |
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struct buffer_head *dqi_gqi_bh; /* Buffer head with global quota file inode - set only if inode lock is obtained */ |
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int dqi_gqi_count; /* Number of holders of dqi_gqi_bh */ |
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u64 dqi_giblk; /* Number of block with global information header */ |
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struct buffer_head *dqi_lqi_bh; /* Buffer head with local quota file inode */ |
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struct buffer_head *dqi_libh; /* Buffer with local information header */ |
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struct qtree_mem_dqinfo dqi_gi; /* Info about global file */ |
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struct delayed_work dqi_sync_work; /* Work for syncing dquots */ |
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struct ocfs2_quota_recovery *dqi_rec; /* Pointer to recovery |
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* information, in case we |
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* enable quotas on file |
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* needing it */ |
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}; |
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static inline struct ocfs2_dquot *OCFS2_DQUOT(struct dquot *dquot) |
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{ |
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return container_of(dquot, struct ocfs2_dquot, dq_dquot); |
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} |
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struct ocfs2_quota_chunk { |
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struct list_head qc_chunk; /* List of quotafile chunks */ |
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int qc_num; /* Number of quota chunk */ |
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struct buffer_head *qc_headerbh; /* Buffer head with chunk header */ |
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}; |
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extern struct kmem_cache *ocfs2_dquot_cachep; |
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extern struct kmem_cache *ocfs2_qf_chunk_cachep; |
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extern const struct qtree_fmt_operations ocfs2_global_ops; |
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struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery( |
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struct ocfs2_super *osb, int slot_num); |
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int ocfs2_finish_quota_recovery(struct ocfs2_super *osb, |
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struct ocfs2_quota_recovery *rec, |
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int slot_num); |
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void ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec); |
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ssize_t ocfs2_quota_read(struct super_block *sb, int type, char *data, |
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size_t len, loff_t off); |
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ssize_t ocfs2_quota_write(struct super_block *sb, int type, |
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const char *data, size_t len, loff_t off); |
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int ocfs2_global_read_info(struct super_block *sb, int type); |
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int ocfs2_global_write_info(struct super_block *sb, int type); |
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int ocfs2_global_read_dquot(struct dquot *dquot); |
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int __ocfs2_sync_dquot(struct dquot *dquot, int freeing); |
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static inline int ocfs2_sync_dquot(struct dquot *dquot) |
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{ |
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return __ocfs2_sync_dquot(dquot, 0); |
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} |
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static inline int ocfs2_global_release_dquot(struct dquot *dquot) |
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{ |
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return __ocfs2_sync_dquot(dquot, 1); |
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} |
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int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex); |
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void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex); |
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int ocfs2_validate_quota_block(struct super_block *sb, struct buffer_head *bh); |
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int ocfs2_read_quota_phys_block(struct inode *inode, u64 p_block, |
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struct buffer_head **bh); |
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int ocfs2_create_local_dquot(struct dquot *dquot); |
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int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot); |
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int ocfs2_local_write_dquot(struct dquot *dquot); |
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void ocfs2_drop_dquot_refs(struct work_struct *work); |
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extern const struct dquot_operations ocfs2_quota_operations; |
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extern struct quota_format_type ocfs2_quota_format; |
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#endif /* _OCFS2_QUOTA_H */
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