Annotation of src/sys/ufs/ufs/quota2.h, Revision 1.4.2.2
1.4.2.2 ! rmind 1: /* $NetBSD$ */
! 2: /*-
! 3: * Copyright (c) 2010 Manuel Bouyer
! 4: * All rights reserved.
! 5: * This software is distributed under the following condiions
! 6: * compliant with the NetBSD foundation policy.
! 7: *
! 8: * Redistribution and use in source and binary forms, with or without
! 9: * modification, are permitted provided that the following conditions
! 10: * are met:
! 11: * 1. Redistributions of source code must retain the above copyright
! 12: * notice, this list of conditions and the following disclaimer.
! 13: * 2. Redistributions in binary form must reproduce the above copyright
! 14: * notice, this list of conditions and the following disclaimer in the
! 15: * documentation and/or other materials provided with the distribution.
! 16: *
! 17: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
! 18: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 19: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 20: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
! 21: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 22: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 23: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 24: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 25: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 26: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 27: * POSSIBILITY OF SUCH DAMAGE.
! 28: */
! 29:
! 30: #ifndef _UFS_UFS_QUOTA2_H_
! 31: #define _UFS_UFS_QUOTA2_H_
! 32: #include <ufs/ufs/quota.h>
! 33: #include <quota/quota.h>
! 34:
! 35:
! 36: /* New disk quota implementation. In this implementation, the quota datas
! 37: * (default values, user limits and current usage) are part of the filesystem
! 38: * metadata. On FFS, this will be in a hidden, unlinked inode. fsck_ffs is
! 39: * responsible for checking quotas with the rest of the filesystem integrity,
! 40: * and quotas metadata are also covered by the filesystem journal if any.
! 41: * quota enable/disable is done on a filesystem basis via flags in the
! 42: * superblock
! 43: */
! 44:
! 45: /*
! 46: * The quota file is comprised of 2 parts, the header and the entries.
! 47: * The header contains global informations, and head of list of quota entries.
! 48: * A quota entry can either be in the free list, or one of the hash lists.
! 49: */
! 50:
! 51: /* description of a block or inode quota */
! 52: struct quota2_val {
! 53: uint64_t q2v_hardlimit; /* absolute limit */
! 54: uint64_t q2v_softlimit; /* overflowable limit */
! 55: uint64_t q2v_cur; /* current usage */
! 56: int64_t q2v_time; /* grace expiration date for softlimit overflow */
! 57: int64_t q2v_grace; /* allowed time for softlimit overflow */
! 58: };
! 59:
! 60: /* NAMES for the above in the plist */
! 61: #define INITQVNAMES_ALL { \
! 62: QUOTADICT_LIMIT_HARD, \
! 63: QUOTADICT_LIMIT_SOFT, \
! 64: QUOTADICT_LIMIT_USAGE, \
! 65: QUOTADICT_LIMIT_ETIME, \
! 66: QUOTADICT_LIMIT_GTIME \
! 67: }
! 68: #define INITQVNAMES_LIMITSONLY { \
! 69: QUOTADICT_LIMIT_HARD, \
! 70: QUOTADICT_LIMIT_SOFT, \
! 71: NULL, \
! 72: NULL, \
! 73: QUOTADICT_LIMIT_GTIME \
! 74: }
! 75:
! 76: #define N_QV 5
! 77: /*
! 78: * On-disk description of a user or group quota
! 79: * These entries are keept as linked list, either in one of the hash HEAD,
! 80: * or in the free list.
! 81: */
! 82:
! 83: #define N_QL 2
! 84: #define QL_BLOCK 0
! 85: #define QL_FILE 1
! 86: #define INITQLNAMES {QUOTADICT_LTYPE_BLOCK, QUOTADICT_LTYPE_FILE}
! 87:
! 88: struct quota2_entry {
! 89: /* block & inode limits and status */
! 90: struct quota2_val q2e_val[N_QL];
! 91: /* pointer to next entry for this list (offset in the file) */
! 92: uint64_t q2e_next;
! 93: /* ownership information */
! 94: uint32_t q2e_uid;
! 95: uint32_t q2e_pad;
! 96: };
! 97:
! 98: /* header present at the start of the quota file */
! 99: struct quota2_header {
! 100: uint32_t q2h_magic_number;
! 101: uint8_t q2h_type; /* quota type, see below */
! 102: uint8_t q2h_hash_shift; /* bytes used for hash index */
! 103: uint16_t q2h_hash_size; /* size of hash table */
! 104: /* default values applied to new entries */
! 105: struct quota2_entry q2h_defentry;
! 106: /* head of free quota2_entry list */
! 107: uint64_t q2h_free;
! 108: /* variable-sized hash table */
! 109: uint64_t q2h_entries[0];
! 110: };
! 111:
! 112: #define Q2_HEAD_MAGIC 0xb746915e
! 113:
! 114: /* superblock flags */
! 115: #define FS_Q2_DO_TYPE(type) (0x01 << (type))
! 116:
! 117: #define off2qindex(hsize, off) (((off) - (hsize)) / sizeof(struct quota2_entry))
! 118: #define qindex2off(hsize, idx) \
! 119: ((daddr_t)(idx) * sizeof(struct quota2_entry) + (hsize))
! 120:
! 121: /* quota2_subr.c */
! 122: void quota2_addfreeq2e(struct quota2_header *, void *, uint64_t, uint64_t, int);
! 123: void quota2_create_blk0(uint64_t, void *bp, int, int, int);
! 124: void quota2_ufs_rwq2v(const struct quota2_val *, struct quota2_val *, int);
! 125: void quota2_ufs_rwq2e(const struct quota2_entry *, struct quota2_entry *, int);
! 126:
! 127: __inline static int __unused
! 128: quota2_check_limit(struct quota2_val *q2v, uint64_t change, time_t now)
! 129: {
! 130: return quota_check_limit(q2v->q2v_cur, change, q2v->q2v_softlimit,
! 131: q2v->q2v_hardlimit, q2v->q2v_time, now);
! 132: }
! 133: #endif /* _UFS_UFS_QUOTA2_H_ */
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