diff options
Diffstat (limited to 'include/linux/quota.h')
| -rw-r--r-- | include/linux/quota.h | 275 |
1 files changed, 131 insertions, 144 deletions
diff --git a/include/linux/quota.h b/include/linux/quota.h index 524ede8a160a..58fdef125252 100644 --- a/include/linux/quota.h +++ b/include/linux/quota.h @@ -29,146 +29,9 @@ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ - #ifndef _LINUX_QUOTA_ #define _LINUX_QUOTA_ -#include <linux/errno.h> -#include <linux/types.h> - -#define __DQUOT_VERSION__ "dquot_6.5.2" - -#define MAXQUOTAS 2 -#define USRQUOTA 0 /* element used for user quotas */ -#define GRPQUOTA 1 /* element used for group quotas */ - -/* - * Definitions for the default names of the quotas files. - */ -#define INITQFNAMES { \ - "user", /* USRQUOTA */ \ - "group", /* GRPQUOTA */ \ - "undefined", \ -}; - -/* - * Command definitions for the 'quotactl' system call. - * The commands are broken into a main command defined below - * and a subcommand that is used to convey the type of - * quota that is being manipulated (see above). - */ -#define SUBCMDMASK 0x00ff -#define SUBCMDSHIFT 8 -#define QCMD(cmd, type) (((cmd) << SUBCMDSHIFT) | ((type) & SUBCMDMASK)) - -#define Q_SYNC 0x800001 /* sync disk copy of a filesystems quotas */ -#define Q_QUOTAON 0x800002 /* turn quotas on */ -#define Q_QUOTAOFF 0x800003 /* turn quotas off */ -#define Q_GETFMT 0x800004 /* get quota format used on given filesystem */ -#define Q_GETINFO 0x800005 /* get information about quota files */ -#define Q_SETINFO 0x800006 /* set information about quota files */ -#define Q_GETQUOTA 0x800007 /* get user quota structure */ -#define Q_SETQUOTA 0x800008 /* set user quota structure */ - -/* Quota format type IDs */ -#define QFMT_VFS_OLD 1 -#define QFMT_VFS_V0 2 -#define QFMT_OCFS2 3 -#define QFMT_VFS_V1 4 - -/* Size of block in which space limits are passed through the quota - * interface */ -#define QIF_DQBLKSIZE_BITS 10 -#define QIF_DQBLKSIZE (1 << QIF_DQBLKSIZE_BITS) - -/* - * Quota structure used for communication with userspace via quotactl - * Following flags are used to specify which fields are valid - */ -enum { - QIF_BLIMITS_B = 0, - QIF_SPACE_B, - QIF_ILIMITS_B, - QIF_INODES_B, - QIF_BTIME_B, - QIF_ITIME_B, -}; - -#define QIF_BLIMITS (1 << QIF_BLIMITS_B) -#define QIF_SPACE (1 << QIF_SPACE_B) -#define QIF_ILIMITS (1 << QIF_ILIMITS_B) -#define QIF_INODES (1 << QIF_INODES_B) -#define QIF_BTIME (1 << QIF_BTIME_B) -#define QIF_ITIME (1 << QIF_ITIME_B) -#define QIF_LIMITS (QIF_BLIMITS | QIF_ILIMITS) -#define QIF_USAGE (QIF_SPACE | QIF_INODES) -#define QIF_TIMES (QIF_BTIME | QIF_ITIME) -#define QIF_ALL (QIF_LIMITS | QIF_USAGE | QIF_TIMES) - -struct if_dqblk { - __u64 dqb_bhardlimit; - __u64 dqb_bsoftlimit; - __u64 dqb_curspace; - __u64 dqb_ihardlimit; - __u64 dqb_isoftlimit; - __u64 dqb_curinodes; - __u64 dqb_btime; - __u64 dqb_itime; - __u32 dqb_valid; -}; - -/* - * Structure used for setting quota information about file via quotactl - * Following flags are used to specify which fields are valid - */ -#define IIF_BGRACE 1 -#define IIF_IGRACE 2 -#define IIF_FLAGS 4 -#define IIF_ALL (IIF_BGRACE | IIF_IGRACE | IIF_FLAGS) - -struct if_dqinfo { - __u64 dqi_bgrace; - __u64 dqi_igrace; - __u32 dqi_flags; - __u32 dqi_valid; -}; - -/* - * Definitions for quota netlink interface - */ -#define QUOTA_NL_NOWARN 0 -#define QUOTA_NL_IHARDWARN 1 /* Inode hardlimit reached */ -#define QUOTA_NL_ISOFTLONGWARN 2 /* Inode grace time expired */ -#define QUOTA_NL_ISOFTWARN 3 /* Inode softlimit reached */ -#define QUOTA_NL_BHARDWARN 4 /* Block hardlimit reached */ -#define QUOTA_NL_BSOFTLONGWARN 5 /* Block grace time expired */ -#define QUOTA_NL_BSOFTWARN 6 /* Block softlimit reached */ -#define QUOTA_NL_IHARDBELOW 7 /* Usage got below inode hardlimit */ -#define QUOTA_NL_ISOFTBELOW 8 /* Usage got below inode softlimit */ -#define QUOTA_NL_BHARDBELOW 9 /* Usage got below block hardlimit */ -#define QUOTA_NL_BSOFTBELOW 10 /* Usage got below block softlimit */ - -enum { - QUOTA_NL_C_UNSPEC, - QUOTA_NL_C_WARNING, - __QUOTA_NL_C_MAX, -}; -#define QUOTA_NL_C_MAX (__QUOTA_NL_C_MAX - 1) - -enum { - QUOTA_NL_A_UNSPEC, - QUOTA_NL_A_QTYPE, - QUOTA_NL_A_EXCESS_ID, - QUOTA_NL_A_WARNING, - QUOTA_NL_A_DEV_MAJOR, - QUOTA_NL_A_DEV_MINOR, - QUOTA_NL_A_CAUSED_ID, - __QUOTA_NL_A_MAX, -}; -#define QUOTA_NL_A_MAX (__QUOTA_NL_A_MAX - 1) - - -#ifdef __KERNEL__ #include <linux/list.h> #include <linux/mutex.h> #include <linux/rwsem.h> @@ -181,10 +44,136 @@ enum { #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 +enum quota_type { + USRQUOTA = 0, /* element used for user quotas */ + GRPQUOTA = 1, /* element used for group quotas */ + PRJQUOTA = 2, /* element used for project quotas */ +}; 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; +} + + extern spinlock_t dq_data_lock; /* Maximal numbers of writes for quota operation (insert/delete/update) @@ -294,10 +283,9 @@ struct dquot { 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 */ - unsigned int dq_id; /* ID this applies to (uid, gid) */ + struct kqid dq_id; /* ID this applies to (uid, gid, projid) */ loff_t dq_off; /* Offset of dquot on disk */ unsigned long dq_flags; /* See DQ_* */ - short dq_type; /* Type of quota */ struct mem_dqblk dq_dqb; /* Diskquota usage */ }; @@ -336,8 +324,8 @@ struct quotactl_ops { 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 *, int, qid_t, struct fs_disk_quota *); - int (*set_dqblk)(struct super_block *, int, qid_t, struct fs_disk_quota *); + 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); }; @@ -386,10 +374,10 @@ static inline unsigned int dquot_generic_flag(unsigned int flags, int type) } #ifdef CONFIG_QUOTA_NETLINK_INTERFACE -extern void quota_send_warning(short type, unsigned int id, dev_t dev, +extern void quota_send_warning(struct kqid qid, dev_t dev, const char warntype); #else -static inline void quota_send_warning(short type, unsigned int id, dev_t dev, +static inline void quota_send_warning(struct kqid qid, dev_t dev, const char warntype) { return; @@ -419,5 +407,4 @@ struct quota_module_name { {QFMT_VFS_V0, "quota_v2"},\ {0, NULL}} -#endif /* __KERNEL__ */ #endif /* _QUOTA_ */ |