1 /* $NetBSD: ulfs_quota2_subr.c,v 1.6 2013/06/06 00:51:50 dholland Exp $ */
2 /* from NetBSD: quota2_subr.c,v 1.5 2012/02/05 14:19:04 dholland Exp */
3
4 /*-
5 * Copyright (c) 2010, 2011 Manuel Bouyer
6 * All rights reserved.
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 #include <sys/cdefs.h>
31 __KERNEL_RCSID(0, "$NetBSD: ulfs_quota2_subr.c,v 1.6 2013/06/06 00:51:50 dholland Exp $");
32
33 #include <sys/param.h>
34 #include <sys/time.h>
35
36 #include <ufs/lfs/lfs.h>
37 #include <ufs/lfs/lfs_extern.h>
38 #include <ufs/lfs/ulfs_inode.h>
39 #include <ufs/lfs/ulfs_dinode.h>
40 #include <ufs/lfs/ulfs_bswap.h>
41 #include <ufs/lfs/ulfs_quota2.h>
42
43 #ifndef _KERNEL
44 #include <string.h>
45 #endif
46
47 void
lfsquota2_addfreeq2e(struct quota2_header * q2h,void * bp,uint64_t baseoff,uint64_t bsize,int ns)48 lfsquota2_addfreeq2e(struct quota2_header *q2h, void *bp, uint64_t baseoff,
49 uint64_t bsize, int ns)
50 {
51 uint64_t blkoff = baseoff % bsize;
52 int i, nq2e;
53 struct quota2_entry *q2e;
54
55 q2e = (void *)((char *)bp + blkoff);
56 nq2e = (bsize - blkoff) / sizeof(*q2e);
57 for (i = 0; i < nq2e; i++) {
58 q2e[i].q2e_next = q2h->q2h_free;
59 q2h->q2h_free = ulfs_rw64(i * sizeof(*q2e) + baseoff, ns);
60 }
61 }
62
63 void
lfsquota2_create_blk0(uint64_t bsize,void * bp,int q2h_hash_shift,int type,int ns)64 lfsquota2_create_blk0(uint64_t bsize, void *bp, int q2h_hash_shift, int type,
65 int ns)
66 {
67 struct quota2_header *q2h;
68 const int quota2_hash_size = 1 << q2h_hash_shift;
69 const int quota2_full_header_size = sizeof(struct quota2_header) +
70 sizeof(q2h->q2h_entries[0]) * quota2_hash_size;
71 int i;
72
73 memset(bp, 0, bsize);
74 q2h = bp;
75 q2h->q2h_magic_number = ulfs_rw32(Q2_HEAD_MAGIC, ns);
76 q2h->q2h_type = type;
77 q2h->q2h_hash_shift = q2h_hash_shift;
78 q2h->q2h_hash_size = ulfs_rw16(quota2_hash_size, ns);
79 /* setup defaut entry: unlimited, 7 days grace */
80 for (i = 0; i < N_QL; i++) {
81 q2h->q2h_defentry.q2e_val[i].q2v_hardlimit =
82 q2h->q2h_defentry.q2e_val[i].q2v_softlimit =
83 ulfs_rw64(UQUAD_MAX, ns);
84 q2h->q2h_defentry.q2e_val[i].q2v_grace =
85 ulfs_rw64(7ULL * 24ULL * 3600ULL, ns);
86 }
87
88 /* first quota entry, after the hash table */
89 lfsquota2_addfreeq2e(q2h, bp, quota2_full_header_size, bsize, ns);
90 }
91
92 void
lfsquota2_ulfs_rwq2v(const struct quota2_val * s,struct quota2_val * d,int needswap)93 lfsquota2_ulfs_rwq2v(const struct quota2_val *s, struct quota2_val *d, int needswap)
94 {
95 d->q2v_hardlimit = ulfs_rw64(s->q2v_hardlimit, needswap);
96 d->q2v_softlimit = ulfs_rw64(s->q2v_softlimit, needswap);
97 d->q2v_cur = ulfs_rw64(s->q2v_cur, needswap);
98 d->q2v_time = ulfs_rw64(s->q2v_time, needswap);
99 d->q2v_grace = ulfs_rw64(s->q2v_grace, needswap);
100 }
101
102 void
lfsquota2_ulfs_rwq2e(const struct quota2_entry * s,struct quota2_entry * d,int needswap)103 lfsquota2_ulfs_rwq2e(const struct quota2_entry *s, struct quota2_entry *d,
104 int needswap)
105 {
106 lfsquota2_ulfs_rwq2v(&s->q2e_val[QL_BLOCK], &d->q2e_val[QL_BLOCK],
107 needswap);
108 lfsquota2_ulfs_rwq2v(&s->q2e_val[QL_FILE], &d->q2e_val[QL_FILE],
109 needswap);
110 d->q2e_uid = ulfs_rw32(s->q2e_uid, needswap);
111 }
112
113 int
lfsquota_check_limit(uint64_t cur,uint64_t change,uint64_t soft,uint64_t hard,time_t expire,time_t now)114 lfsquota_check_limit(uint64_t cur, uint64_t change, uint64_t soft, uint64_t hard,
115 time_t expire, time_t now)
116 {
117 if (cur + change > hard) {
118 if (cur <= soft)
119 return (QL_F_CROSS | QL_S_DENY_HARD);
120 return QL_S_DENY_HARD;
121 } else if (cur + change > soft) {
122 if (cur <= soft)
123 return (QL_F_CROSS | QL_S_ALLOW_SOFT);
124 if (now > expire) {
125 return QL_S_DENY_GRACE;
126 }
127 return QL_S_ALLOW_SOFT;
128 }
129 return QL_S_ALLOW_OK;
130 }
131