1206552Sluigi/* SPDX-License-Identifier: GPL-2.0 */ 2206552Sluigi/* 3206497Sluigi * quota.h for OCFS2 4206497Sluigi * 5206497Sluigi * On disk quota structures for local and global quota file, in-memory 6206497Sluigi * structures. 7206497Sluigi * 8206497Sluigi */ 9206497Sluigi 10206497Sluigi#ifndef _OCFS2_QUOTA_H 11206497Sluigi#define _OCFS2_QUOTA_H 12206497Sluigi 13206497Sluigi#include <linux/types.h> 14206497Sluigi#include <linux/slab.h> 15206497Sluigi#include <linux/quota.h> 16206497Sluigi#include <linux/list.h> 17206497Sluigi#include <linux/dqblk_qtree.h> 18206497Sluigi 19206497Sluigi#include "ocfs2.h" 20206497Sluigi 21206497Sluigi/* Number of quota types we support */ 22206497Sluigi#define OCFS2_MAXQUOTAS 2 23206497Sluigi 24206497Sluigi/* 25206497Sluigi * In-memory structures 26206552Sluigi */ 27206552Sluigistruct ocfs2_dquot { 28239834Sissyl0 struct dquot dq_dquot; /* Generic VFS dquot */ 29206497Sluigi loff_t dq_local_off; /* Offset in the local quota file */ 30206497Sluigi u64 dq_local_phys_blk; /* Physical block carrying quota structure */ 31206497Sluigi struct ocfs2_quota_chunk *dq_chunk; /* Chunk dquot is in */ 32206497Sluigi unsigned int dq_use_count; /* Number of nodes having reference to this entry in global quota file */ 33206497Sluigi s64 dq_origspace; /* Last globally synced space usage */ 34206497Sluigi s64 dq_originodes; /* Last globally synced inode usage */ 35206497Sluigi struct llist_node list; /* Member of list of dquots to drop */ 36206497Sluigi}; 37206497Sluigi 38206497Sluigi/* Description of one chunk to recover in memory */ 39206497Sluigistruct ocfs2_recovery_chunk { 40206497Sluigi struct list_head rc_list; /* List of chunks */ 41206497Sluigi int rc_chunk; /* Chunk number */ 42206497Sluigi unsigned long *rc_bitmap; /* Bitmap of entries to recover */ 43206497Sluigi}; 44206497Sluigi 45206497Sluigistruct ocfs2_quota_recovery { 46206497Sluigi struct list_head r_list[OCFS2_MAXQUOTAS]; /* List of chunks to recover */ 47206497Sluigi}; 48206497Sluigi 49206497Sluigi/* In-memory structure with quota header information */ 50206497Sluigistruct ocfs2_mem_dqinfo { 51206497Sluigi unsigned int dqi_type; /* Quota type this structure describes */ 52206497Sluigi unsigned int dqi_flags; /* Flags OLQF_* */ 53206497Sluigi unsigned int dqi_chunks; /* Number of chunks in local quota file */ 54206497Sluigi unsigned int dqi_blocks; /* Number of blocks allocated for local quota file */ 55206497Sluigi unsigned int dqi_syncms; /* How often should we sync with other nodes */ 56206497Sluigi struct list_head dqi_chunk; /* List of chunks */ 57206497Sluigi struct inode *dqi_gqinode; /* Global quota file inode */ 58206497Sluigi struct ocfs2_lock_res dqi_gqlock; /* Lock protecting quota information structure */ 59206497Sluigi struct buffer_head *dqi_gqi_bh; /* Buffer head with global quota file inode - set only if inode lock is obtained */ 60206497Sluigi int dqi_gqi_count; /* Number of holders of dqi_gqi_bh */ 61206497Sluigi u64 dqi_giblk; /* Number of block with global information header */ 62206497Sluigi struct buffer_head *dqi_lqi_bh; /* Buffer head with local quota file inode */ 63206497Sluigi struct buffer_head *dqi_libh; /* Buffer with local information header */ 64206497Sluigi struct qtree_mem_dqinfo dqi_gi; /* Info about global file */ 65206497Sluigi struct delayed_work dqi_sync_work; /* Work for syncing dquots */ 66206497Sluigi struct ocfs2_quota_recovery *dqi_rec; /* Pointer to recovery 67206497Sluigi * information, in case we 68206497Sluigi * enable quotas on file 69206497Sluigi * needing it */ 70206497Sluigi}; 71206497Sluigi 72206497Sluigistatic inline struct ocfs2_dquot *OCFS2_DQUOT(struct dquot *dquot) 73206497Sluigi{ 74206497Sluigi return container_of(dquot, struct ocfs2_dquot, dq_dquot); 75206497Sluigi} 76206497Sluigi 77206497Sluigistruct ocfs2_quota_chunk { 78206497Sluigi struct list_head qc_chunk; /* List of quotafile chunks */ 79206497Sluigi int qc_num; /* Number of quota chunk */ 80206497Sluigi struct buffer_head *qc_headerbh; /* Buffer head with chunk header */ 81206497Sluigi}; 82206497Sluigi 83206497Sluigiextern struct kmem_cache *ocfs2_dquot_cachep; 84206497Sluigiextern struct kmem_cache *ocfs2_qf_chunk_cachep; 85206497Sluigi 86206497Sluigiextern const struct qtree_fmt_operations ocfs2_global_ops; 87206497Sluigi 88206497Sluigistruct ocfs2_quota_recovery *ocfs2_begin_quota_recovery( 89206497Sluigi struct ocfs2_super *osb, int slot_num); 90206497Sluigiint ocfs2_finish_quota_recovery(struct ocfs2_super *osb, 91206497Sluigi struct ocfs2_quota_recovery *rec, 92206497Sluigi int slot_num); 93206497Sluigivoid ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec); 94206497Sluigissize_t ocfs2_quota_read(struct super_block *sb, int type, char *data, 95211962Suqs size_t len, loff_t off); 96206497Sluigissize_t ocfs2_quota_write(struct super_block *sb, int type, 97206497Sluigi const char *data, size_t len, loff_t off); 98206497Sluigiint ocfs2_global_read_info(struct super_block *sb, int type); 99209350Suqsint ocfs2_global_write_info(struct super_block *sb, int type); 100206497Sluigiint ocfs2_global_read_dquot(struct dquot *dquot); 101206497Sluigiint __ocfs2_sync_dquot(struct dquot *dquot, int freeing); 102206497Sluigistatic inline int ocfs2_sync_dquot(struct dquot *dquot) 103206497Sluigi{ 104206497Sluigi return __ocfs2_sync_dquot(dquot, 0); 105206497Sluigi} 106206497Sluigistatic inline int ocfs2_global_release_dquot(struct dquot *dquot) 107206497Sluigi{ 108206497Sluigi return __ocfs2_sync_dquot(dquot, 1); 109206497Sluigi} 110206497Sluigi 111206497Sluigiint ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex); 112206497Sluigivoid ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex); 113206497Sluigiint ocfs2_validate_quota_block(struct super_block *sb, struct buffer_head *bh); 114206497Sluigiint ocfs2_read_quota_phys_block(struct inode *inode, u64 p_block, 115206497Sluigi struct buffer_head **bh); 116206497Sluigiint ocfs2_create_local_dquot(struct dquot *dquot); 117206497Sluigiint ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot); 118206497Sluigiint ocfs2_local_write_dquot(struct dquot *dquot); 119206497Sluigivoid ocfs2_drop_dquot_refs(struct work_struct *work); 120206497Sluigi 121206497Sluigiextern const struct dquot_operations ocfs2_quota_operations; 122206497Sluigiextern struct quota_format_type ocfs2_quota_format; 123206497Sluigi 124206497Sluigi#endif /* _OCFS2_QUOTA_H */ 125206497Sluigi