http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/linux/quota.h

/* * Copyright (c) 1982, 1986 Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * Robert Elz at The University of Melbourne. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * Version: $Id: quota.h,v 2.0 1996/11/17 16:48:14 mvw Exp mvw $ */ #ifndef _LINUX_QUOTA_ #define _LINUX_QUOTA_ #include <linux/errno.h> #include <linux/types.h> #include <linux/spinlock.h> #define __DQUOT_VERSION__ "dquot_6.5.1" #define __DQUOT_NUM_VERSION__ 6*10000+5*100+1 typedef __kernel_uid32_t qid_t; /* Type in which we store ids in memory */ typedef __u64 qsize_t; /* Type in which we store sizes */ extern spinlock_t dq_data_lock; /* Size of blocks in which are counted size limits */ #define QUOTABLOCK_BITS 10 #define QUOTABLOCK_SIZE (1 << QUOTABLOCK_BITS) /* Conversion routines from and to quota blocks */ #define qb2kb(x) ((x) << (QUOTABLOCK_BITS-10)) #define kb2qb(x) ((x) >> (QUOTABLOCK_BITS-10)) #define toqb(x) (((x) + QUOTABLOCK_SIZE - 1) >> QUOTABLOCK_BITS) #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 structure used for communication with userspace via quotactl * Following flags are used to specify which fields are valid */ #define QIF_BLIMITS 1 #define QIF_SPACE 2 #define QIF_ILIMITS 4 #define QIF_INODES 8 #define QIF_BTIME 16 #define QIF_ITIME 32 #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; }; #ifdef __KERNEL__ #include <linux/dqblk_xfs.h> #include <linux/dqblk_v1.h> #include <linux/dqblk_v2.h> /* Maximal numbers of writes for quota operation (insert/delete/update) * (over VFS all formats) */ #define DQUOT_INIT_ALLOC max(V1_INIT_ALLOC, V2_INIT_ALLOC) #define DQUOT_INIT_REWRITE max(V1_INIT_REWRITE, V2_INIT_REWRITE) #define DQUOT_DEL_ALLOC max(V1_DEL_ALLOC, V2_DEL_ALLOC) #define DQUOT_DEL_REWRITE max(V1_DEL_REWRITE, V2_DEL_REWRITE) /* * Data for one user/group kept in memory */ struct mem_dqblk { __u32 dqb_bhardlimit; /* absolute limit on disk blks alloc */ __u32 dqb_bsoftlimit; /* preferred limit on disk blks */ qsize_t dqb_curspace; /* current used space */ __u32 dqb_ihardlimit; /* absolute limit on allocated inodes */ __u32 dqb_isoftlimit; /* preferred inode limit */ __u32 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 */ }; /* * Data for one quotafile kept in memory */ struct quota_format_type; struct mem_dqinfo { struct quota_format_type *dqi_format; struct list_head dqi_dirty_list; /* List of dirty dquots */ unsigned long dqi_flags; unsigned int dqi_bgrace; unsigned int dqi_igrace; union { struct v1_mem_dqinfo v1_i; struct v2_mem_dqinfo v2_i; } u; }; struct super_block; #define DQF_MASK 0xffff /* Mask for format specific flags */ #define DQF_INFO_DIRTY_B 16 #define DQF_INFO_DIRTY (1 << DQF_INFO_DIRTY_B) /* Is info dirty? */ extern void mark_info_dirty(struct super_block *sb, int type); #define info_dirty(info) test_bit(DQF_INFO_DIRTY_B, &(info)->dqi_flags) #define info_any_dquot_dirty(info) (!list_empty(&(info)->dqi_dirty_list)) #define info_any_dirty(info) (info_dirty(info) || info_any_dquot_dirty(info)) #define sb_dqopt(sb) (&(sb)->s_dquot) #define sb_dqinfo(sb, type) (sb_dqopt(sb)->info+(type)) struct dqstats { int lookups; int drops; int reads; int writes; int cache_hits; int allocated_dquots; int free_dquots; int syncs; }; extern struct dqstats dqstats; #define DQ_MOD_B 0 /* dquot modified since read */ #define DQ_BLKS_B 1 /* uid/gid has been warned about blk limit */ #define DQ_INODES_B 2 /* uid/gid has been warned about inode limit */ #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_WAITFREE_B 6 /* dquot being waited (by invalidate_dquots) */ 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 semaphore dq_lock; /* dquot IO lock */ 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) */ 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 */ }; #define NODQUOT (struct dquot *)NULL #define QUOTA_OK 0 #define NO_QUOTA 1 /* Operations which must be implemented by each quota format */ struct quota_format_ops { int (*check_quota_file)(struct super_block *sb, int type); /* Detect whether file is in our format */ int (*read_file_info)(struct super_block *sb, int type); /* Read main info about file - called on quotaon() */ int (*write_file_info)(struct super_block *sb, int type); /* Write main info about file */ int (*free_file_info)(struct super_block *sb, int type); /* Called on quotaoff() */ 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 */ }; /* Operations working with dquots */ struct dquot_operations { int (*initialize) (struct inode *, int); int (*drop) (struct inode *); int (*alloc_space) (struct inode *, qsize_t, int); int (*alloc_inode) (const struct inode *, unsigned long); int (*free_space) (struct inode *, qsize_t); int (*free_inode) (const struct inode *, unsigned long); int (*transfer) (struct inode *, struct iattr *); int (*write_dquot) (struct dquot *); /* Ordinary dquot write */ int (*acquire_dquot) (struct dquot *); /* Quota is going to be created on disk */ int (*release_dquot) (struct dquot *); /* Quota is going to be deleted from disk */ int (*mark_dirty) (struct dquot *); /* Dquot is marked dirty */ int (*write_info) (struct super_block *, int); /* Write of quota "superblock" */ }; /* Operations handling requests from userspace */ struct quotactl_ops { int (*quota_on)(struct super_block *, int, int, char *); int (*quota_off)(struct super_block *, 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 *, int, qid_t, struct if_dqblk *); int (*set_dqblk)(struct super_block *, int, qid_t, struct if_dqblk *); int (*get_xstate)(struct super_block *, struct fs_quota_stat *); int (*set_xstate)(struct super_block *, unsigned int, int); int (*get_xquota)(struct super_block *, int, qid_t, struct fs_disk_quota *); int (*set_xquota)(struct super_block *, int, qid_t, struct fs_disk_quota *); }; struct quota_format_type { int qf_fmt_id; /* Quota format id */ struct quota_format_ops *qf_ops; /* Operations of format */ struct module *qf_owner; /* Module implementing quota format */ struct quota_format_type *qf_next; }; #define DQUOT_USR_ENABLED 0x01 /* User diskquotas enabled */ #define DQUOT_GRP_ENABLED 0x02 /* Group diskquotas enabled */ struct quota_info { unsigned int flags; /* Flags for diskquotas on this device */ struct semaphore dqio_sem; /* lock device while I/O in progress */ struct semaphore dqonoff_sem; /* Serialize quotaon & quotaoff */ struct rw_semaphore dqptr_sem; /* serialize ops using quota_info struct, pointers from inode to dquots */ struct inode *files[MAXQUOTAS]; /* inodes of quotafiles */ struct mem_dqinfo info[MAXQUOTAS]; /* Information for each quota type */ struct quota_format_ops *ops[MAXQUOTAS]; /* Operations for each type */ }; /* Inline would be better but we need to dereference super_block which is not defined yet */ int mark_dquot_dirty(struct dquot *dquot); #define dquot_dirty(dquot) test_bit(DQ_MOD_B, &(dquot)->dq_flags) #define sb_has_quota_enabled(sb, type) ((type)==USRQUOTA ? \ (sb_dqopt(sb)->flags & DQUOT_USR_ENABLED) : (sb_dqopt(sb)->flags & DQUOT_GRP_ENABLED)) #define sb_any_quota_enabled(sb) (sb_has_quota_enabled(sb, USRQUOTA) | \ sb_has_quota_enabled(sb, GRPQUOTA)) int register_quota_format(struct quota_format_type *fmt); void unregister_quota_format(struct quota_format_type *fmt); struct quota_module_name { int qm_fmt_id; char *qm_mod_name; }; #define INIT_QUOTA_MODULE_NAMES {\ {QFMT_VFS_OLD, "quota_v1"},\ {QFMT_VFS_V0, "quota_v2"},\ {0, NULL}} #else # /* nodep */ include <sys/cdefs.h> __BEGIN_DECLS long quotactl __P ((unsigned int, const char *, int, caddr_t)); __END_DECLS #endif /* __KERNEL__ */ #endif /* _QUOTA_ */