| /** 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 */ |