/** quotaio.h * * Header of IO operations for quota utilities * Jan Kara <jack@suse.cz> */ #ifndef GUARD_QUOTAIO_H #define GUARD_QUOTAIO_H #include <limits.h> #include <sys/types.h> #include <sys/stat.h> #include "ext2fs/ext2fs.h" #include "dqblk_v2.h" typedef int64_t qsize_t; /* Type in which we store size limitations */ #define MAXQUOTAS 2 #define USRQUOTA 0 #define GRPQUOTA 1 /* * Definitions of magics and versions of current quota files */ #define INITQMAGICS {\ 0xd9c01f11, /* USRQUOTA */\ 0xd9c01927 /* GRPQUOTA */\ } /* Size of blocks in which are counted size limits in generic utility parts */ #define QUOTABLOCK_BITS 10 #define QUOTABLOCK_SIZE (1 << QUOTABLOCK_BITS) #define toqb(x) (((x) + QUOTABLOCK_SIZE - 1) >> QUOTABLOCK_BITS) /* Quota format type IDs */ #define QFMT_VFS_OLD 1 #define QFMT_VFS_V0 2 #define QFMT_VFS_V1 4 /* * 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_INFODIRTY 0x01 /* Did info change? */ 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 */ union { struct v2_mem_dqinfo v2_mdqi; } u; /* Format specific info about quotafile */ }; struct quota_file { ext2_filsys fs; ext2_ino_t ino; ext2_file_t e2_file; }; /* Structure for one opened quota file */ struct quota_handle { int qh_type; /* Type of quotafile */ int qh_fmt; /* Quotafile format */ int qh_io_flags; /* IO flags for file */ struct quota_file qh_qf; unsigned int (*e2fs_read)(struct quota_file *qf, ext2_loff_t offset, void *buf, unsigned int size); unsigned int (*e2fs_write)(struct quota_file *qf, ext2_loff_t offset, void *buf, unsigned int size); struct quotafile_ops *qh_ops; /* Operations on quotafile */ struct util_dqinfo qh_info; /* Generic quotafile info */ }; /* 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 */ }; /* 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 for this dquot */ struct util_dqblk dq_dqb; /* Parsed data of dquot */ }; /* Structure of quotafile operations */ struct quotafile_ops { /* Check whether quotafile is in our format */ int (*check_file) (struct quota_handle *h, int type, int fmt); /* Open quotafile */ int (*init_io) (struct quota_handle *h); /* Create new quotafile */ int (*new_io) (struct quota_handle *h); /* Write all changes and close quotafile */ int (*end_io) (struct quota_handle *h); /* Write info about quotafile */ int (*write_info) (struct quota_handle *h); /* Read dquot into memory */ struct dquot *(*read_dquot) (struct quota_handle *h, qid_t id); /* Write given dquot to disk */ int (*commit_dquot) (struct dquot *dquot); /* Scan quotafile and call callback on every structure */ int (*scan_dquots) (struct quota_handle *h, int (*process_dquot) (struct dquot *dquot, void *data), void *data); /* Function to print format specific file information */ int (*report) (struct quota_handle *h, int verbose); }; /* This might go into a special header file but that sounds a bit silly... */ extern struct quotafile_ops quotafile_ops_meta; /* Open existing quotafile of given type (and verify its format) on given * filesystem. */ errcode_t quota_file_open(struct quota_handle *h, ext2_filsys fs, ext2_ino_t qf_ino, int type, int fmt, int flags); /* Create new quotafile of specified format on given filesystem */ errcode_t quota_file_create(struct quota_handle *h, ext2_filsys fs, int type, int fmt); /* Close quotafile */ errcode_t quota_file_close(struct quota_handle *h); /* Get empty quota structure */ struct dquot *get_empty_dquot(void); errcode_t quota_inode_truncate(ext2_filsys fs, ext2_ino_t ino); const char *type2name(int type); void update_grace_times(struct dquot *q); /* size for the buffer returned by quota_get_qf_name(); must be greater than maxlen of extensions[] and fmtnames[] (plus 2) found in quotaio.c */ #define QUOTA_NAME_LEN 16 const char *quota_get_qf_name(int type, int fmt, char *buf); const char *quota_get_qf_path(const char *mntpt, int qtype, int fmt, char *path_buf, size_t path_buf_size); #endif /* GUARD_QUOTAIO_H */