diff options
Diffstat (limited to 'include/linux/quota.h')
| -rw-r--r-- | include/linux/quota.h | 218 |
1 files changed, 175 insertions, 43 deletions
diff --git a/include/linux/quota.h b/include/linux/quota.h index d13371134c59..89a0d83ddad0 100644 --- a/include/linux/quota.h +++ b/include/linux/quota.h @@ -50,12 +50,18 @@ #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 */ @@ -85,7 +91,7 @@ extern bool qid_valid(struct kqid qid); * * 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. + * test for and handle invalid kqids being returned. * Invalid kqids may be tested for using qid_valid(). */ static inline struct kqid make_kqid(struct user_namespace *from, @@ -173,6 +179,16 @@ static inline struct kqid make_kqid_projid(kprojid_t 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; @@ -194,8 +210,8 @@ struct mem_dqblk { qsize_t dqb_ihardlimit; /* absolute limit on allocated inodes */ qsize_t dqb_isoftlimit; /* preferred inode limit */ qsize_t dqb_curinodes; /* current # allocated inodes */ - time_t dqb_btime; /* time limit for excessive disk use */ - time_t dqb_itime; /* time limit for excessive inode use */ + time64_t dqb_btime; /* time limit for excessive disk use */ + time64_t dqb_itime; /* time limit for excessive inode use */ }; /* @@ -207,23 +223,25 @@ 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 */ - unsigned long dqi_flags; - unsigned int dqi_bgrace; - unsigned int dqi_igrace; - qsize_t dqi_maxblimit; - qsize_t dqi_maxilimit; + 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; -#define DQF_MASK 0xffff /* Mask for format specific flags */ -#define DQF_GETINFO_MASK 0x1ffff /* Mask for flags passed to userspace */ -#define DQF_SETINFO_MASK 0xffff /* Mask for flags modifiable from userspace */ -#define DQF_SYS_FILE_B 16 -#define DQF_SYS_FILE (1 << DQF_SYS_FILE_B) /* Quota file stored as system file */ -#define DQF_INFO_DIRTY_B 31 +/* 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); @@ -245,11 +263,10 @@ enum { }; struct dqstats { - int stat[_DQST_DQSTAT_LAST]; + unsigned long stat[_DQST_DQSTAT_LAST]; struct percpu_counter counter[_DQST_DQSTAT_LAST]; }; -extern struct dqstats *dqstats_pcpu; extern struct dqstats dqstats; static inline void dqstats_inc(unsigned int type) @@ -268,25 +285,27 @@ static inline void dqstats_dec(unsigned int type) #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\ +#define DQ_RELEASING_B 6 /* dquot is in releasing_dquots list waiting + * to be cleaned up */ +#define DQ_LASTSET_B 7 /* 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 */ - struct list_head dq_inuse; /* List of all quotas */ - struct list_head dq_free; /* Free list element */ - struct list_head dq_dirty; /* List of dirty dquots */ + 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 */ - wait_queue_head_t dq_wait_unused; /* Wait queue for dquot to become unused */ 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 */ + 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 */ + struct mem_dqblk dq_dqb; /* Diskquota usage [dq_dqb_lock] */ }; /* Operations which must be implemented by each quota format */ @@ -298,6 +317,7 @@ struct quota_format_ops { 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 */ @@ -312,22 +332,114 @@ struct dquot_operations { /* 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, struct path *); - int (*quota_on_meta)(struct super_block *, int, int); + 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 (*get_info)(struct super_block *, int, struct if_dqinfo *); - int (*set_info)(struct super_block *, int, struct if_dqinfo *); - int (*get_dqblk)(struct super_block *, struct kqid, struct fs_disk_quota *); - int (*set_dqblk)(struct super_block *, struct kqid, struct fs_disk_quota *); - int (*get_xstate)(struct super_block *, struct fs_quota_stat *); - int (*set_xstate)(struct super_block *, unsigned int, 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 { @@ -337,7 +449,20 @@ struct quota_format_type { struct quota_format_type *qf_next; }; -/* Quota state flags - they actually come in two flavors - for users and groups */ +/** + * 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 */ @@ -346,9 +471,9 @@ enum { * memory to turn them on */ _DQUOT_STATE_FLAGS }; -#define DQUOT_USAGE_ENABLED (1 << _DQUOT_USAGE_ENABLED) -#define DQUOT_LIMITS_ENABLED (1 << _DQUOT_LIMITS_ENABLED) -#define DQUOT_SUSPENDED (1 << _DQUOT_SUSPENDED) +#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 */ @@ -362,15 +487,24 @@ enum { */ #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 << _DQUOT_STATE_FLAGS * type; + return flags << type; } static inline unsigned int dquot_generic_flag(unsigned int flags, int type) { - return (flags >> _DQUOT_STATE_FLAGS * type) & DQUOT_STATE_FLAGS; + 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 @@ -386,15 +520,13 @@ static inline void quota_send_warning(struct kqid qid, dev_t dev, struct quota_info { unsigned int flags; /* Flags for diskquotas on this device */ - struct mutex dqio_mutex; /* lock device while I/O in progress */ - struct mutex dqonoff_mutex; /* Serialize quotaon & quotaoff */ - struct rw_semaphore dqptr_sem; /* serialize ops using quota_info struct, pointers from inode to dquots */ + 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 register_quota_format(struct quota_format_type *fmt); void unregister_quota_format(struct quota_format_type *fmt); struct quota_module_name { |