1 /*-
2 * Copyright (c) 1995 The University of Utah and
3 * the Computer Systems Laboratory at the University of Utah (CSL).
4 * All rights reserved.
5 *
6 * Permission to use, copy, modify and distribute this software is hereby
7 * granted provided that (1) source code retains these copyright, permission,
8 * and disclaimer notices, and (2) redistributions including binaries
9 * reproduce the notices in supporting documentation, and (3) all advertising
10 * materials mentioning features or use of this software display the following
11 * acknowledgement: ``This product includes software developed by the
12 * Computer Systems Laboratory at the University of Utah.''
13 *
14 * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
15 * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
16 * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
17 *
18 * CSL requests users of this software to return to csl-dist@cs.utah.edu any
19 * improvements that they make and grant CSL redistribution rights.
20 *
21 * Utah $Hdr$
22 * $FreeBSD: releng/9.1/sys/fs/ext2fs/ext2_inode_cnv.c 233322 2012-03-22 20:31:52Z pfg $
23 */
24
25 /*
26 * routines to convert on disk ext2 inodes into inodes and back
27 */
28 #include <sys/param.h>
29 #include <sys/systm.h>
30 #include <sys/lock.h>
31 #include <sys/stat.h>
32 #include <sys/vnode.h>
33
34 #include <fs/ext2fs/inode.h>
35 #include <fs/ext2fs/ext2fs.h>
36 #include <fs/ext2fs/ext2_extern.h>
37 #include <fs/ext2fs/ext2_dinode.h>
38
39 #define XTIME_TO_NSEC(x) ((x & EXT3_NSEC_MASK) >> 2)
40 #define NSEC_TO_XTIME(t) ((t << 2) & EXT3_NSEC_MASK)
41
42 void
43 ext2_print_inode( in )
44 struct inode *in;
45 {
46 int i;
47
48 printf( "Inode: %5d", in->i_number);
49 printf( /* "Inode: %5d" */
50 " Type: %10s Mode: 0x%o Flags: 0x%x Version: %d\n",
51 "n/a", in->i_mode, in->i_flags, in->i_gen);
52 printf( "User: %5lu Group: %5lu Size: %lu\n",
53 (unsigned long)in->i_uid, (unsigned long)in->i_gid,
54 (unsigned long)in->i_size);
55 printf( "Links: %3d Blockcount: %d\n",
56 in->i_nlink, in->i_blocks);
57 printf( "ctime: 0x%x", in->i_ctime);
58 printf( "atime: 0x%x", in->i_atime);
59 printf( "mtime: 0x%x", in->i_mtime);
60 printf( "BLOCKS: ");
61 for(i=0; i < (in->i_blocks <= 24 ? ((in->i_blocks+1)/2): 12); i++)
62 printf("%d ", in->i_db[i]);
63 printf("\n");
64 }
65
66 /*
67 * raw ext2 inode to inode
68 */
69 void
70 ext2_ei2i(ei, ip)
71 struct ext2fs_dinode *ei;
72 struct inode *ip;
73 {
74 int i;
75
76 ip->i_nlink = ei->e2di_nlink;
77 /* Godmar thinks - if the link count is zero, then the inode is
78 unused - according to ext2 standards. Ufs marks this fact
79 by setting i_mode to zero - why ?
80 I can see that this might lead to problems in an undelete.
81 */
82 ip->i_mode = ei->e2di_nlink ? ei->e2di_mode : 0;
83 ip->i_size = ei->e2di_size;
84 if (S_ISREG(ip->i_mode))
85 ip->i_size |= ((u_int64_t)ei->e2di_size_high) << 32;
86 ip->i_atime = ei->e2di_atime;
87 ip->i_mtime = ei->e2di_mtime;
88 ip->i_ctime = ei->e2di_ctime;
89 if (E2DI_HAS_XTIME(ip)) {
90 ip->i_atimensec = XTIME_TO_NSEC(ei->e2di_atime_extra);
91 ip->i_mtimensec = XTIME_TO_NSEC(ei->e2di_mtime_extra);
92 ip->i_ctimensec = XTIME_TO_NSEC(ei->e2di_ctime_extra);
93 ip->i_birthtime = ei->e2di_crtime;
94 ip->i_birthnsec = XTIME_TO_NSEC(ei->e2di_crtime_extra);
95 }
96 ip->i_flags = 0;
97 ip->i_flags |= (ei->e2di_flags & EXT2_APPEND) ? SF_APPEND : 0;
98 ip->i_flags |= (ei->e2di_flags & EXT2_IMMUTABLE) ? SF_IMMUTABLE : 0;
99 ip->i_flags |= (ei->e2di_flags & EXT2_NODUMP) ? UF_NODUMP : 0;
100 ip->i_blocks = ei->e2di_nblock;
101 ip->i_gen = ei->e2di_gen;
102 ip->i_uid = ei->e2di_uid;
103 ip->i_gid = ei->e2di_gid;
104 /* XXX use memcpy */
105 for(i = 0; i < NDADDR; i++)
106 ip->i_db[i] = ei->e2di_blocks[i];
107 for(i = 0; i < NIADDR; i++)
108 ip->i_ib[i] = ei->e2di_blocks[EXT2_NDIR_BLOCKS + i];
109 }
110
111 /*
112 * inode to raw ext2 inode
113 */
114 void
115 ext2_i2ei(ip, ei)
116 struct inode *ip;
117 struct ext2fs_dinode *ei;
118 {
119 int i;
120
121 ei->e2di_mode = ip->i_mode;
122 ei->e2di_nlink = ip->i_nlink;
123 /*
124 Godmar thinks: if dtime is nonzero, ext2 says this inode
125 has been deleted, this would correspond to a zero link count
126 */
127 ei->e2di_dtime = ei->e2di_nlink ? 0 : ip->i_mtime;
128 ei->e2di_size = ip->i_size;
129 if (S_ISREG(ip->i_mode))
130 ei->e2di_size_high = ip->i_size >> 32;
131 ei->e2di_atime = ip->i_atime;
132 ei->e2di_mtime = ip->i_mtime;
133 ei->e2di_ctime = ip->i_ctime;
134 if (E2DI_HAS_XTIME(ip)) {
135 ei->e2di_ctime_extra = NSEC_TO_XTIME(ip->i_ctimensec);
136 ei->e2di_mtime_extra = NSEC_TO_XTIME(ip->i_mtimensec);
137 ei->e2di_atime_extra = NSEC_TO_XTIME(ip->i_atimensec);
138 ei->e2di_crtime = ip->i_birthtime;
139 ei->e2di_crtime_extra = NSEC_TO_XTIME(ip->i_birthnsec);
140 }
141 ei->e2di_flags = ip->i_flags;
142 ei->e2di_flags = 0;
143 ei->e2di_flags |= (ip->i_flags & SF_APPEND) ? EXT2_APPEND: 0;
144 ei->e2di_flags |= (ip->i_flags & SF_IMMUTABLE) ? EXT2_IMMUTABLE: 0;
145 ei->e2di_flags |= (ip->i_flags & UF_NODUMP) ? EXT2_NODUMP: 0;
146 ei->e2di_nblock = ip->i_blocks;
147 ei->e2di_gen = ip->i_gen;
148 ei->e2di_uid = ip->i_uid;
149 ei->e2di_gid = ip->i_gid;
150 /* XXX use memcpy */
151 for(i = 0; i < NDADDR; i++)
152 ei->e2di_blocks[i] = ip->i_db[i];
153 for(i = 0; i < NIADDR; i++)
154 ei->e2di_blocks[EXT2_NDIR_BLOCKS + i] = ip->i_ib[i];
155 }
Cache object: 3889d9865d7a59ff7c389efbbd80c9be
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