| /* |
| * Copyright (c) 1982, 1986 Regents of the University of California. |
| * All rights reserved. |
| * |
| * This code is derived from software contributed to Berkeley by |
| * Robert Elz at The University of Melbourne. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of the University nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| #ifndef _LINUX_QUOTA_ |
| #define _LINUX_QUOTA_ |
| |
| #include <linux/list.h> |
| #include <linux/mutex.h> |
| #include <linux/rwsem.h> |
| #include <linux/spinlock.h> |
| #include <linux/wait.h> |
| #include <linux/percpu_counter.h> |
| |
| #include <linux/dqblk_xfs.h> |
| #include <linux/dqblk_v1.h> |
| #include <linux/dqblk_v2.h> |
| |
| #include <linux/atomic.h> |
| #include <linux/uidgid.h> |
| #include <linux/projid.h> |
| #include <uapi/linux/quota.h> |
| |
| #undef USRQUOTA |
| #undef GRPQUOTA |
| #undef PRJQUOTA |
| enum quota_type { |
| USRQUOTA = 0, /* element used for user quotas */ |
| GRPQUOTA = 1, /* element used for group quotas */ |
| PRJQUOTA = 2, /* element used for project quotas */ |
| }; |
| |
| /* Masks for quota types when used as a bitmask */ |
| #define QTYPE_MASK_USR (1 << USRQUOTA) |
| #define QTYPE_MASK_GRP (1 << GRPQUOTA) |
| #define QTYPE_MASK_PRJ (1 << PRJQUOTA) |
| |
| typedef __kernel_uid32_t qid_t; /* Type in which we store ids in memory */ |
| typedef long long qsize_t; /* Type in which we store sizes */ |
| |
| struct kqid { /* Type in which we store the quota identifier */ |
| union { |
| kuid_t uid; |
| kgid_t gid; |
| kprojid_t projid; |
| }; |
| enum quota_type type; /* USRQUOTA (uid) or GRPQUOTA (gid) or PRJQUOTA (projid) */ |
| }; |
| |
| extern bool qid_eq(struct kqid left, struct kqid right); |
| extern bool qid_lt(struct kqid left, struct kqid right); |
| extern qid_t from_kqid(struct user_namespace *to, struct kqid qid); |
| extern qid_t from_kqid_munged(struct user_namespace *to, struct kqid qid); |
| extern bool qid_valid(struct kqid qid); |
| |
| /** |
| * make_kqid - Map a user-namespace, type, qid tuple into a kqid. |
| * @from: User namespace that the qid is in |
| * @type: The type of quota |
| * @qid: Quota identifier |
| * |
| * Maps a user-namespace, type qid tuple into a kernel internal |
| * kqid, and returns that kqid. |
| * |
| * When there is no mapping defined for the user-namespace, type, |
| * qid tuple an invalid kqid is returned. Callers are expected to |
| * test for and handle handle invalid kqids being returned. |
| * Invalid kqids may be tested for using qid_valid(). |
| */ |
| static inline struct kqid make_kqid(struct user_namespace *from, |
| enum quota_type type, qid_t qid) |
| { |
| struct kqid kqid; |
| |
| kqid.type = type; |
| switch (type) { |
| case USRQUOTA: |
| kqid.uid = make_kuid(from, qid); |
| break; |
| case GRPQUOTA: |
| kqid.gid = make_kgid(from, qid); |
| break; |
| case PRJQUOTA: |
| kqid.projid = make_kprojid(from, qid); |
| break; |
| default: |
| BUG(); |
| } |
| return kqid; |
| } |
| |
| /** |
| * make_kqid_invalid - Explicitly make an invalid kqid |
| * @type: The type of quota identifier |
| * |
| * Returns an invalid kqid with the specified type. |
| */ |
| static inline struct kqid make_kqid_invalid(enum quota_type type) |
| { |
| struct kqid kqid; |
| |
| kqid.type = type; |
| switch (type) { |
| case USRQUOTA: |
| kqid.uid = INVALID_UID; |
| break; |
| case GRPQUOTA: |
| kqid.gid = INVALID_GID; |
| break; |
| case PRJQUOTA: |
| kqid.projid = INVALID_PROJID; |
| break; |
| default: |
| BUG(); |
| } |
| return kqid; |
| } |
| |
| /** |
| * make_kqid_uid - Make a kqid from a kuid |
| * @uid: The kuid to make the quota identifier from |
| */ |
| static inline struct kqid make_kqid_uid(kuid_t uid) |
| { |
| struct kqid kqid; |
| kqid.type = USRQUOTA; |
| kqid.uid = uid; |
| return kqid; |
| } |
| |
| /** |
| * make_kqid_gid - Make a kqid from a kgid |
| * @gid: The kgid to make the quota identifier from |
| */ |
| static inline struct kqid make_kqid_gid(kgid_t gid) |
| { |
| struct kqid kqid; |
| kqid.type = GRPQUOTA; |
| kqid.gid = gid; |
| return kqid; |
| } |
| |
| /** |
| * make_kqid_projid - Make a kqid from a projid |
| * @projid: The kprojid to make the quota identifier from |
| */ |
| static inline struct kqid make_kqid_projid(kprojid_t projid) |
| { |
| struct kqid kqid; |
| kqid.type = PRJQUOTA; |
| kqid.projid = projid; |
| return kqid; |
| } |
| |
| /** |
| * qid_has_mapping - Report if a qid maps into a user namespace. |
| * @ns: The user namespace to see if a value maps into. |
| * @qid: The kernel internal quota identifier to test. |
| */ |
| static inline bool qid_has_mapping(struct user_namespace *ns, struct kqid qid) |
| { |
| return from_kqid(ns, qid) != (qid_t) -1; |
| } |
| |
| |
| extern spinlock_t dq_data_lock; |
| |
| /* Maximal numbers of writes for quota operation (insert/delete/update) |
| * (over VFS all formats) */ |
| #define DQUOT_INIT_ALLOC max(V1_INIT_ALLOC, V2_INIT_ALLOC) |
| #define DQUOT_INIT_REWRITE max(V1_INIT_REWRITE, V2_INIT_REWRITE) |
| #define DQUOT_DEL_ALLOC max(V1_DEL_ALLOC, V2_DEL_ALLOC) |
| #define DQUOT_DEL_REWRITE max(V1_DEL_REWRITE, V2_DEL_REWRITE) |
| |
| /* |
| * Data for one user/group kept in memory |
| */ |
| struct mem_dqblk { |
| qsize_t dqb_bhardlimit; /* absolute limit on disk blks alloc */ |
| qsize_t dqb_bsoftlimit; /* preferred limit on disk blks */ |
| qsize_t dqb_curspace; /* current used space */ |
| qsize_t dqb_rsvspace; /* current reserved space for delalloc*/ |
| qsize_t dqb_ihardlimit; /* absolute limit on allocated inodes */ |
| qsize_t dqb_isoftlimit; /* preferred inode limit */ |
| qsize_t dqb_curinodes; /* current # allocated inodes */ |
| time64_t dqb_btime; /* time limit for excessive disk use */ |
| time64_t dqb_itime; /* time limit for excessive inode use */ |
| }; |
| |
| /* |
| * Data for one quotafile kept in memory |
| */ |
| struct quota_format_type; |
| |
| struct mem_dqinfo { |
| struct quota_format_type *dqi_format; |
| int dqi_fmt_id; /* Id of the dqi_format - used when turning |
| * quotas on after remount RW */ |
| struct list_head dqi_dirty_list; /* List of dirty dquots [dq_list_lock] */ |
| unsigned long dqi_flags; /* DFQ_ flags [dq_data_lock] */ |
| unsigned int dqi_bgrace; /* Space grace time [dq_data_lock] */ |
| unsigned int dqi_igrace; /* Inode grace time [dq_data_lock] */ |
| qsize_t dqi_max_spc_limit; /* Maximum space limit [static] */ |
| qsize_t dqi_max_ino_limit; /* Maximum inode limit [static] */ |
| void *dqi_priv; |
| }; |
| |
| struct super_block; |
| |
| /* Mask for flags passed to userspace */ |
| #define DQF_GETINFO_MASK (DQF_ROOT_SQUASH | DQF_SYS_FILE) |
| /* Mask for flags modifiable from userspace */ |
| #define DQF_SETINFO_MASK DQF_ROOT_SQUASH |
| |
| enum { |
| DQF_INFO_DIRTY_B = DQF_PRIVATE, |
| }; |
| #define DQF_INFO_DIRTY (1 << DQF_INFO_DIRTY_B) /* Is info dirty? */ |
| |
| extern void mark_info_dirty(struct super_block *sb, int type); |
| static inline int info_dirty(struct mem_dqinfo *info) |
| { |
| return test_bit(DQF_INFO_DIRTY_B, &info->dqi_flags); |
| } |
| |
| enum { |
| DQST_LOOKUPS, |
| DQST_DROPS, |
| DQST_READS, |
| DQST_WRITES, |
| DQST_CACHE_HITS, |
| DQST_ALLOC_DQUOTS, |
| DQST_FREE_DQUOTS, |
| DQST_SYNCS, |
| _DQST_DQSTAT_LAST |
| }; |
| |
| struct dqstats { |
| unsigned long stat[_DQST_DQSTAT_LAST]; |
| struct percpu_counter counter[_DQST_DQSTAT_LAST]; |
| }; |
| |
| extern struct dqstats dqstats; |
| |
| static inline void dqstats_inc(unsigned int type) |
| { |
| percpu_counter_inc(&dqstats.counter[type]); |
| } |
| |
| static inline void dqstats_dec(unsigned int type) |
| { |
| percpu_counter_dec(&dqstats.counter[type]); |
| } |
| |
| #define DQ_MOD_B 0 /* dquot modified since read */ |
| #define DQ_BLKS_B 1 /* uid/gid has been warned about blk limit */ |
| #define DQ_INODES_B 2 /* uid/gid has been warned about inode limit */ |
| #define DQ_FAKE_B 3 /* no limits only usage */ |
| #define DQ_READ_B 4 /* dquot was read into memory */ |
| #define DQ_ACTIVE_B 5 /* dquot is active (dquot_release not called) */ |
| #define DQ_LASTSET_B 6 /* Following 6 bits (see QIF_) are reserved\ |
| * for the mask of entries set via SETQUOTA\ |
| * quotactl. They are set under dq_data_lock\ |
| * and the quota format handling dquot can\ |
| * clear them when it sees fit. */ |
| |
| struct dquot { |
| struct hlist_node dq_hash; /* Hash list in memory [dq_list_lock] */ |
| struct list_head dq_inuse; /* List of all quotas [dq_list_lock] */ |
| struct list_head dq_free; /* Free list element [dq_list_lock] */ |
| struct list_head dq_dirty; /* List of dirty dquots [dq_list_lock] */ |
| struct mutex dq_lock; /* dquot IO lock */ |
| spinlock_t dq_dqb_lock; /* Lock protecting dq_dqb changes */ |
| atomic_t dq_count; /* Use count */ |
| struct super_block *dq_sb; /* superblock this applies to */ |
| struct kqid dq_id; /* ID this applies to (uid, gid, projid) */ |
| loff_t dq_off; /* Offset of dquot on disk [dq_lock, stable once set] */ |
| unsigned long dq_flags; /* See DQ_* */ |
| struct mem_dqblk dq_dqb; /* Diskquota usage [dq_dqb_lock] */ |
| }; |
| |
| /* Operations which must be implemented by each quota format */ |
| struct quota_format_ops { |
| int (*check_quota_file)(struct super_block *sb, int type); /* Detect whether file is in our format */ |
| int (*read_file_info)(struct super_block *sb, int type); /* Read main info about file - called on quotaon() */ |
| int (*write_file_info)(struct super_block *sb, int type); /* Write main info about file */ |
| int (*free_file_info)(struct super_block *sb, int type); /* Called on quotaoff() */ |
| int (*read_dqblk)(struct dquot *dquot); /* Read structure for one user */ |
| int (*commit_dqblk)(struct dquot *dquot); /* Write structure for one user */ |
| int (*release_dqblk)(struct dquot *dquot); /* Called when last reference to dquot is being dropped */ |
| int (*get_next_id)(struct super_block *sb, struct kqid *qid); /* Get next ID with existing structure in the quota file */ |
| }; |
| |
| /* Operations working with dquots */ |
| struct dquot_operations { |
| int (*write_dquot) (struct dquot *); /* Ordinary dquot write */ |
| struct dquot *(*alloc_dquot)(struct super_block *, int); /* Allocate memory for new dquot */ |
| void (*destroy_dquot)(struct dquot *); /* Free memory for dquot */ |
| int (*acquire_dquot) (struct dquot *); /* Quota is going to be created on disk */ |
| int (*release_dquot) (struct dquot *); /* Quota is going to be deleted from disk */ |
| int (*mark_dirty) (struct dquot *); /* Dquot is marked dirty */ |
| int (*write_info) (struct super_block *, int); /* Write of quota "superblock" */ |
| /* get reserved quota for delayed alloc, value returned is managed by |
| * quota code only */ |
| qsize_t *(*get_reserved_space) (struct inode *); |
| int (*get_projid) (struct inode *, kprojid_t *);/* Get project ID */ |
| /* Get number of inodes that were charged for a given inode */ |
| int (*get_inode_usage) (struct inode *, qsize_t *); |
| /* Get next ID with active quota structure */ |
| int (*get_next_id) (struct super_block *sb, struct kqid *qid); |
| }; |
| |
| struct path; |
| |
| /* Structure for communicating via ->get_dqblk() & ->set_dqblk() */ |
| struct qc_dqblk { |
| int d_fieldmask; /* mask of fields to change in ->set_dqblk() */ |
| u64 d_spc_hardlimit; /* absolute limit on used space */ |
| u64 d_spc_softlimit; /* preferred limit on used space */ |
| u64 d_ino_hardlimit; /* maximum # allocated inodes */ |
| u64 d_ino_softlimit; /* preferred inode limit */ |
| u64 d_space; /* Space owned by the user */ |
| u64 d_ino_count; /* # inodes owned by the user */ |
| s64 d_ino_timer; /* zero if within inode limits */ |
| /* if not, we refuse service */ |
| s64 d_spc_timer; /* similar to above; for space */ |
| int d_ino_warns; /* # warnings issued wrt num inodes */ |
| int d_spc_warns; /* # warnings issued wrt used space */ |
| u64 d_rt_spc_hardlimit; /* absolute limit on realtime space */ |
| u64 d_rt_spc_softlimit; /* preferred limit on RT space */ |
| u64 d_rt_space; /* realtime space owned */ |
| s64 d_rt_spc_timer; /* similar to above; for RT space */ |
| int d_rt_spc_warns; /* # warnings issued wrt RT space */ |
| }; |
| |
| /* |
| * Field specifiers for ->set_dqblk() in struct qc_dqblk and also for |
| * ->set_info() in struct qc_info |
| */ |
| #define QC_INO_SOFT (1<<0) |
| #define QC_INO_HARD (1<<1) |
| #define QC_SPC_SOFT (1<<2) |
| #define QC_SPC_HARD (1<<3) |
| #define QC_RT_SPC_SOFT (1<<4) |
| #define QC_RT_SPC_HARD (1<<5) |
| #define QC_LIMIT_MASK (QC_INO_SOFT | QC_INO_HARD | QC_SPC_SOFT | QC_SPC_HARD | \ |
| QC_RT_SPC_SOFT | QC_RT_SPC_HARD) |
| #define QC_SPC_TIMER (1<<6) |
| #define QC_INO_TIMER (1<<7) |
| #define QC_RT_SPC_TIMER (1<<8) |
| #define QC_TIMER_MASK (QC_SPC_TIMER | QC_INO_TIMER | QC_RT_SPC_TIMER) |
| #define QC_SPC_WARNS (1<<9) |
| #define QC_INO_WARNS (1<<10) |
| #define QC_RT_SPC_WARNS (1<<11) |
| #define QC_WARNS_MASK (QC_SPC_WARNS | QC_INO_WARNS | QC_RT_SPC_WARNS) |
| #define QC_SPACE (1<<12) |
| #define QC_INO_COUNT (1<<13) |
| #define QC_RT_SPACE (1<<14) |
| #define QC_ACCT_MASK (QC_SPACE | QC_INO_COUNT | QC_RT_SPACE) |
| #define QC_FLAGS (1<<15) |
| |
| #define QCI_SYSFILE (1 << 0) /* Quota file is hidden from userspace */ |
| #define QCI_ROOT_SQUASH (1 << 1) /* Root squash turned on */ |
| #define QCI_ACCT_ENABLED (1 << 2) /* Quota accounting enabled */ |
| #define QCI_LIMITS_ENFORCED (1 << 3) /* Quota limits enforced */ |
| |
| /* Structures for communicating via ->get_state */ |
| struct qc_type_state { |
| unsigned int flags; /* Flags QCI_* */ |
| unsigned int spc_timelimit; /* Time after which space softlimit is |
| * enforced */ |
| unsigned int ino_timelimit; /* Ditto for inode softlimit */ |
| unsigned int rt_spc_timelimit; /* Ditto for real-time space */ |
| unsigned int spc_warnlimit; /* Limit for number of space warnings */ |
| unsigned int ino_warnlimit; /* Ditto for inodes */ |
| unsigned int rt_spc_warnlimit; /* Ditto for real-time space */ |
| unsigned long long ino; /* Inode number of quota file */ |
| blkcnt_t blocks; /* Number of 512-byte blocks in the file */ |
| blkcnt_t nextents; /* Number of extents in the file */ |
| }; |
| |
| struct qc_state { |
| unsigned int s_incoredqs; /* Number of dquots in core */ |
| struct qc_type_state s_state[MAXQUOTAS]; /* Per quota type information */ |
| }; |
| |
| /* Structure for communicating via ->set_info */ |
| struct qc_info { |
| int i_fieldmask; /* mask of fields to change in ->set_info() */ |
| unsigned int i_flags; /* Flags QCI_* */ |
| unsigned int i_spc_timelimit; /* Time after which space softlimit is |
| * enforced */ |
| unsigned int i_ino_timelimit; /* Ditto for inode softlimit */ |
| unsigned int i_rt_spc_timelimit;/* Ditto for real-time space */ |
| unsigned int i_spc_warnlimit; /* Limit for number of space warnings */ |
| unsigned int i_ino_warnlimit; /* Limit for number of inode warnings */ |
| unsigned int i_rt_spc_warnlimit; /* Ditto for real-time space */ |
| }; |
| |
| /* Operations handling requests from userspace */ |
| struct quotactl_ops { |
| int (*quota_on)(struct super_block *, int, int, const struct path *); |
| int (*quota_off)(struct super_block *, int); |
| int (*quota_enable)(struct super_block *, unsigned int); |
| int (*quota_disable)(struct super_block *, unsigned int); |
| int (*quota_sync)(struct super_block *, int); |
| int (*set_info)(struct super_block *, int, struct qc_info *); |
| int (*get_dqblk)(struct super_block *, struct kqid, struct qc_dqblk *); |
| int (*get_nextdqblk)(struct super_block *, struct kqid *, |
| struct qc_dqblk *); |
| int (*set_dqblk)(struct super_block *, struct kqid, struct qc_dqblk *); |
| int (*get_state)(struct super_block *, struct qc_state *); |
| int (*rm_xquota)(struct super_block *, unsigned int); |
| }; |
| |
| struct quota_format_type { |
| int qf_fmt_id; /* Quota format id */ |
| const struct quota_format_ops *qf_ops; /* Operations of format */ |
| struct module *qf_owner; /* Module implementing quota format */ |
| struct quota_format_type *qf_next; |
| }; |
| |
| /** |
| * Quota state flags - they come in three flavors - for users, groups and projects. |
| * |
| * Actual typed flags layout: |
| * USRQUOTA GRPQUOTA PRJQUOTA |
| * DQUOT_USAGE_ENABLED 0x0001 0x0002 0x0004 |
| * DQUOT_LIMITS_ENABLED 0x0008 0x0010 0x0020 |
| * DQUOT_SUSPENDED 0x0040 0x0080 0x0100 |
| * |
| * Following bits are used for non-typed flags: |
| * DQUOT_QUOTA_SYS_FILE 0x0200 |
| * DQUOT_NEGATIVE_USAGE 0x0400 |
| * DQUOT_NOLIST_DIRTY 0x0800 |
| */ |
| enum { |
| _DQUOT_USAGE_ENABLED = 0, /* Track disk usage for users */ |
| _DQUOT_LIMITS_ENABLED, /* Enforce quota limits for users */ |
| _DQUOT_SUSPENDED, /* User diskquotas are off, but |
| * we have necessary info in |
| * memory to turn them on */ |
| _DQUOT_STATE_FLAGS |
| }; |
| #define DQUOT_USAGE_ENABLED (1 << _DQUOT_USAGE_ENABLED * MAXQUOTAS) |
| #define DQUOT_LIMITS_ENABLED (1 << _DQUOT_LIMITS_ENABLED * MAXQUOTAS) |
| #define DQUOT_SUSPENDED (1 << _DQUOT_SUSPENDED * MAXQUOTAS) |
| #define DQUOT_STATE_FLAGS (DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED | \ |
| DQUOT_SUSPENDED) |
| /* Other quota flags */ |
| #define DQUOT_STATE_LAST (_DQUOT_STATE_FLAGS * MAXQUOTAS) |
| #define DQUOT_QUOTA_SYS_FILE (1 << DQUOT_STATE_LAST) |
| /* Quota file is a special |
| * system file and user cannot |
| * touch it. Filesystem is |
| * responsible for setting |
| * S_NOQUOTA, S_NOATIME flags |
| */ |
| #define DQUOT_NEGATIVE_USAGE (1 << (DQUOT_STATE_LAST + 1)) |
| /* Allow negative quota usage */ |
| /* Do not track dirty dquots in a list */ |
| #define DQUOT_NOLIST_DIRTY (1 << (DQUOT_STATE_LAST + 2)) |
| |
| static inline unsigned int dquot_state_flag(unsigned int flags, int type) |
| { |
| return flags << type; |
| } |
| |
| static inline unsigned int dquot_generic_flag(unsigned int flags, int type) |
| { |
| return (flags >> type) & DQUOT_STATE_FLAGS; |
| } |
| |
| /* Bitmap of quota types where flag is set in flags */ |
| static __always_inline unsigned dquot_state_types(unsigned flags, unsigned flag) |
| { |
| BUILD_BUG_ON_NOT_POWER_OF_2(flag); |
| return (flags / flag) & ((1 << MAXQUOTAS) - 1); |
| } |
| |
| #ifdef CONFIG_QUOTA_NETLINK_INTERFACE |
| extern void quota_send_warning(struct kqid qid, dev_t dev, |
| const char warntype); |
| #else |
| static inline void quota_send_warning(struct kqid qid, dev_t dev, |
| const char warntype) |
| { |
| return; |
| } |
| #endif /* CONFIG_QUOTA_NETLINK_INTERFACE */ |
| |
| struct quota_info { |
| unsigned int flags; /* Flags for diskquotas on this device */ |
| struct rw_semaphore dqio_sem; /* Lock quota file while I/O in progress */ |
| struct inode *files[MAXQUOTAS]; /* inodes of quotafiles */ |
| struct mem_dqinfo info[MAXQUOTAS]; /* Information for each quota type */ |
| const struct quota_format_ops *ops[MAXQUOTAS]; /* Operations for each type */ |
| }; |
| |
| int register_quota_format(struct quota_format_type *fmt); |
| void unregister_quota_format(struct quota_format_type *fmt); |
| |
| struct quota_module_name { |
| int qm_fmt_id; |
| char *qm_mod_name; |
| }; |
| |
| #define INIT_QUOTA_MODULE_NAMES {\ |
| {QFMT_VFS_OLD, "quota_v1"},\ |
| {QFMT_VFS_V0, "quota_v2"},\ |
| {QFMT_VFS_V1, "quota_v2"},\ |
| {0, NULL}} |
| |
| #endif /* _QUOTA_ */ |