| /* |
| * |
| * Header of IO operations for quota utilities |
| * |
| */ |
| |
| #ifndef GUARD_QUOTAIO_H |
| #define GUARD_QUOTAIO_H |
| |
| #include <limits.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <stdint.h> |
| |
| #include "quota.h" |
| #include "mntopt.h" |
| #include "dqblk_v1.h" |
| #include "dqblk_v2.h" |
| #include "dqblk_rpc.h" |
| #include "dqblk_xfs.h" |
| |
| #define QUOTAFORMATS 6 |
| |
| #define INITQFBASENAMES {\ |
| "quota",\ |
| "aquota",\ |
| "aquota",\ |
| "",\ |
| "",\ |
| "",\ |
| } |
| |
| #define MAX_FSTYPE_LEN 16 /* Maximum length of filesystem type name */ |
| |
| /* Values for format handling */ |
| #define QF_ERROR -1 /* There was error while detecting format (maybe unknown format...) */ |
| #define QF_VFSOLD 0 /* Old quota format */ |
| #define QF_VFSV0 1 /* Quota files with tree quota format */ |
| #define QF_VFSV1 2 /* Quota files with 64-bit tree quota format */ |
| #define QF_RPC 3 /* RPC should be used on given filesystem */ |
| #define QF_XFS 4 /* XFS quota format */ |
| #define QF_META 5 /* Quota files are hidden, we don't care about the format */ |
| #define QF_VFSUNKNOWN 6 /* Some VFS quotas, we didn't detect particular format yet */ |
| |
| static inline int is_tree_qfmt(int fmt) |
| { |
| return fmt == QF_VFSV0 || fmt == QF_VFSV1; |
| } |
| |
| /* |
| * Definitions for disk quotas imposed on the average user |
| * (big brother finally hits Linux). |
| * |
| * The following constants define the default amount of time given a user |
| * before the soft limits are treated as hard limits (usually resulting |
| * in an allocation failure). The timer is started when the user crosses |
| * their soft limit, it is reset when they go below their soft limit. |
| */ |
| #define MAX_IQ_TIME 604800 /* (7*24*60*60) 1 week */ |
| #define MAX_DQ_TIME 604800 /* (7*24*60*60) 1 week */ |
| |
| #define IOFL_QUOTAON 0x01 /* Is quota enabled in kernel? */ |
| #define IOFL_INFODIRTY 0x02 /* Did info change? */ |
| #define IOFL_RO 0x04 /* Just RO access? */ |
| #define IOFL_NFS_MIXED_PATHS 0x08 /* Should we trim leading slashes |
| from NFSv4 mountpoints? */ |
| |
| struct quotafile_ops; |
| |
| /* Generic information about quotafile */ |
| struct util_dqinfo { |
| time_t dqi_bgrace; /* Block grace time for given quotafile */ |
| time_t dqi_igrace; /* Inode grace time for given quotafile */ |
| uint64_t dqi_max_b_limit; /* Maximal block limit storable in current format */ |
| uint64_t dqi_max_i_limit; /* Maximal inode limit storable in current format */ |
| uint64_t dqi_max_b_usage; /* Maximal block usage storable in current format */ |
| uint64_t dqi_max_i_usage; /* Maximal inode usage storable in current format */ |
| union { |
| struct v2_mem_dqinfo v2_mdqi; |
| struct xfs_mem_dqinfo xfs_mdqi; |
| } u; /* Format specific info about quotafile */ |
| }; |
| |
| /* Structure for one opened quota file */ |
| struct quota_handle { |
| int qh_fd; /* Handle of file (-1 when IOFL_QUOTAON) */ |
| int qh_io_flags; /* IO flags for file */ |
| char qh_quotadev[PATH_MAX]; /* Device file is for */ |
| char qh_dir[PATH_MAX]; /* Directory filesystem is mounted at */ |
| char qh_fstype[MAX_FSTYPE_LEN]; /* Type of the filesystem on qh_quotadev */ |
| int qh_type; /* Type of quotafile */ |
| int qh_fmt; /* Quotafile format */ |
| struct stat qh_stat; /* stat(2) for qh_quotadev */ |
| struct quotafile_ops *qh_ops; /* Operations on quotafile */ |
| struct util_dqinfo qh_info; /* Generic quotafile info */ |
| }; |
| |
| /* Statistics gathered from kernel */ |
| struct util_dqstats { |
| u_int32_t lookups; |
| u_int32_t drops; |
| u_int32_t reads; |
| u_int32_t writes; |
| u_int32_t cache_hits; |
| u_int32_t allocated_dquots; |
| u_int32_t free_dquots; |
| u_int32_t syncs; |
| u_int32_t version; |
| }; |
| |
| /* Utility quota block */ |
| struct util_dqblk { |
| qsize_t dqb_ihardlimit; |
| qsize_t dqb_isoftlimit; |
| qsize_t dqb_curinodes; |
| qsize_t dqb_bhardlimit; |
| qsize_t dqb_bsoftlimit; |
| qsize_t dqb_curspace; |
| time_t dqb_btime; |
| time_t dqb_itime; |
| union { |
| struct v2_mem_dqblk v2_mdqb; |
| } u; /* Format specific dquot information */ |
| }; |
| |
| #define DQ_FOUND 0x01 /* Dquot was found in the edquotas file */ |
| #define DQ_PRINTED 0x02 /* Dquota has been already printed by repquota */ |
| |
| /* Structure for one loaded quota */ |
| struct dquot { |
| struct dquot *dq_next; /* Pointer to next dquot in the list */ |
| qid_t dq_id; /* ID dquot belongs to */ |
| int dq_flags; /* Some flags for utils */ |
| struct quota_handle *dq_h; /* Handle of quotafile dquot belongs to */ |
| struct util_dqblk dq_dqb; /* Parsed data of dquot */ |
| }; |
| |
| /* Flags for commit function (have effect only when quota in kernel is turned on) */ |
| #define COMMIT_USAGE QIF_USAGE |
| #define COMMIT_LIMITS QIF_LIMITS |
| #define COMMIT_TIMES QIF_TIMES |
| #define COMMIT_ALL (COMMIT_USAGE | COMMIT_LIMITS | COMMIT_TIMES) |
| |
| /* Structure of quotafile operations */ |
| struct quotafile_ops { |
| int (*check_file) (int fd, int type, int fmt); /* Check whether quotafile is in our format */ |
| int (*init_io) (struct quota_handle * h); /* Open quotafile */ |
| int (*new_io) (struct quota_handle * h); /* Create new quotafile */ |
| int (*end_io) (struct quota_handle * h); /* Write all changes and close quotafile */ |
| int (*write_info) (struct quota_handle * h); /* Write info about quotafile */ |
| struct dquot *(*read_dquot) (struct quota_handle * h, qid_t id); /* Read dquot into memory */ |
| int (*commit_dquot) (struct dquot * dquot, int flag); /* Write given dquot to disk */ |
| int (*scan_dquots) (struct quota_handle * h, int (*process_dquot) (struct dquot * dquot, char * dqname)); /* Scan quotafile and call callback on every structure */ |
| int (*report) (struct quota_handle * h, int verbose); /* Function called after 'repquota' to print format specific file information */ |
| }; |
| |
| /* This might go into a special header file but that sounds a bit silly... */ |
| extern struct quotafile_ops quotafile_ops_meta; |
| |
| static inline void mark_quotafile_info_dirty(struct quota_handle *h) |
| { |
| h->qh_io_flags |= IOFL_INFODIRTY; |
| } |
| |
| #define QIO_ENABLED(h) ((h)->qh_io_flags & IOFL_QUOTAON) |
| #define QIO_RO(h) ((h)->qh_io_flags & IOFL_RO) |
| |
| struct mount_entry; |
| |
| /* Check quota format used on specified medium and initialize it */ |
| struct quota_handle *init_io(struct mount_entry *mnt, int type, int fmt, int flags); |
| |
| /* Create new quotafile of specified format on given filesystem */ |
| struct quota_handle *new_io(struct mount_entry *mnt, int type, int fmt); |
| |
| /* Close quotafile */ |
| int end_io(struct quota_handle *h); |
| |
| /* Get empty quota structure */ |
| struct dquot *get_empty_dquot(void); |
| |
| /* Check whether values in current dquot can be stored on disk */ |
| int check_dquot_range(struct dquot *dquot); |
| |
| #endif /* GUARD_QUOTAIO_H */ |