minix/sys/ufs/lfs/ulfs_quota2.h

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/* $NetBSD: ulfs_quota2.h,v 1.4 2013/06/06 00:49:28 dholland Exp $ */
/* from NetBSD: quota2.h,v 1.9 2012/02/05 14:19:04 dholland Exp */
/*-
* Copyright (c) 2010 Manuel Bouyer
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#ifndef _UFS_LFS_ULFS_QUOTA2_H_
#define _UFS_LFS_ULFS_QUOTA2_H_
#include <ufs/lfs/ulfs_quotacommon.h>
/* New disk quota implementation. In this implementation, the quota datas
* (default values, user limits and current usage) are part of the filesystem
* metadata. On FFS, this will be in a hidden, unlinked inode. fsck_ffs is
* responsible for checking quotas with the rest of the filesystem integrity,
* and quotas metadata are also covered by the filesystem journal if any.
* quota enable/disable is done on a filesystem basis via flags in the
* superblock
*/
/*
* The quota file is comprised of 2 parts, the header and the entries.
* The header contains global informations, and head of list of quota entries.
* A quota entry can either be in the free list, or one of the hash lists.
*/
/* description of a block or inode quota */
struct quota2_val {
uint64_t q2v_hardlimit; /* absolute limit */
uint64_t q2v_softlimit; /* overflowable limit */
uint64_t q2v_cur; /* current usage */
int64_t q2v_time; /* grace expiration date for softlimit overflow */
int64_t q2v_grace; /* allowed time for softlimit overflow */
};
/*
* On-disk description of a user or group quota
* These entries are keept as linked list, either in one of the hash HEAD,
* or in the free list.
*/
#define N_QL 2
#define QL_BLOCK 0
#define QL_FILE 1
#define INITQLNAMES { \
[QL_BLOCK] = "block", \
[QL_FILE] = "file", \
}
struct quota2_entry {
/* block & inode limits and status */
struct quota2_val q2e_val[N_QL];
/* pointer to next entry for this list (offset in the file) */
uint64_t q2e_next;
/* ownership information */
uint32_t q2e_uid;
uint32_t q2e_pad;
};
/* header present at the start of the quota file */
struct quota2_header {
uint32_t q2h_magic_number;
uint8_t q2h_type; /* quota type, see below */
uint8_t q2h_hash_shift; /* bytes used for hash index */
uint16_t q2h_hash_size; /* size of hash table */
/* default values applied to new entries */
struct quota2_entry q2h_defentry;
/* head of free quota2_entry list */
uint64_t q2h_free;
/* variable-sized hash table */
uint64_t q2h_entries[0];
};
#define Q2_HEAD_MAGIC 0xb746915e
/* superblock flags */
#define FS_Q2_DO_TYPE(type) (0x01 << (type))
#define off2qindex(hsize, off) (((off) - (hsize)) / sizeof(struct quota2_entry))
#define qindex2off(hsize, idx) \
((daddr_t)(idx) * sizeof(struct quota2_entry) + (hsize))
/* quota2_subr.c */
void lfsquota2_addfreeq2e(struct quota2_header *, void *, uint64_t, uint64_t, int);
void lfsquota2_create_blk0(uint64_t, void *bp, int, int, int);
void lfsquota2_ulfs_rwq2v(const struct quota2_val *, struct quota2_val *, int);
void lfsquota2_ulfs_rwq2e(const struct quota2_entry *, struct quota2_entry *, int);
/*
* Return codes for lfsquota_check_limit()
*/
#define QL_S_ALLOW_OK 0x00 /* below soft limit */
#define QL_S_ALLOW_SOFT 0x01 /* over soft limit */
#define QL_S_DENY_GRACE 0x02 /* over soft limit, grace time expired */
#define QL_S_DENY_HARD 0x03 /* over hard limit */
#define QL_F_CROSS 0x80 /* crossing soft limit */
#define QL_STATUS(x) ((x) & 0x0f)
#define QL_FLAGS(x) ((x) & 0xf0)
/* check a quota usage against limits */
int lfsquota_check_limit(uint64_t, uint64_t, uint64_t, uint64_t, time_t, time_t);
#endif /* _UFS_LFS_ULFS_QUOTA2_H_ */