2 * Copyright (c) 1995 The University of Utah and
3 * the Computer Systems Laboratory at the University of Utah (CSL).
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.''
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.
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.
26 * routines to convert on disk ext2 inodes into inodes and back
28 #include <sys/param.h>
29 #include <sys/systm.h>
30 #include <sys/endian.h>
33 #include <sys/vnode.h>
35 #include <fs/ext2fs/fs.h>
36 #include <fs/ext2fs/inode.h>
37 #include <fs/ext2fs/ext2fs.h>
38 #include <fs/ext2fs/ext2_dinode.h>
39 #include <fs/ext2fs/ext2_extern.h>
41 #define XTIME_TO_NSEC(x) ((x & EXT3_NSEC_MASK) >> 2)
42 #define NSEC_TO_XTIME(t) (le32toh(t << 2) & EXT3_NSEC_MASK)
46 ext2_print_inode(struct inode *in)
49 struct ext4_extent_header *ehp;
50 struct ext4_extent *ep;
52 printf( "Inode: %5ju", (uintmax_t)in->i_number);
53 printf( /* "Inode: %5d" */
54 " Type: %10s Mode: 0x%o Flags: 0x%x Version: %d\n",
55 "n/a", in->i_mode, in->i_flags, in->i_gen);
56 printf("User: %5u Group: %5u Size: %ju\n",
57 in->i_uid, in->i_gid, (uintmax_t)in->i_size);
58 printf("Links: %3d Blockcount: %ju\n",
59 in->i_nlink, (uintmax_t)in->i_blocks);
60 printf( "ctime: 0x%x", in->i_ctime);
61 printf( "atime: 0x%x", in->i_atime);
62 printf( "mtime: 0x%x", in->i_mtime);
63 if (E2DI_HAS_XTIME(in))
64 printf("crtime %#x ", in->i_birthtime);
66 for (i = 0; i < (in->i_blocks <= 24 ? (in->i_blocks + 1) / 2 : 12); i++)
67 printf(" %d", in->i_db[i]);
70 ehp = (struct ext4_extent_header *)in->i_db;
71 printf("Header (magic 0x%x entries %d max %d depth %d gen %d)\n",
72 ehp->eh_magic, ehp->eh_ecount, ehp->eh_max, ehp->eh_depth,
74 ep = (struct ext4_extent *)(char *)(ehp + 1);
75 printf("Index (blk %d len %d start_lo %d start_hi %d)\n", ep->e_blk,
76 ep->e_len, ep->e_start_lo, ep->e_start_hi);
79 #endif /* EXT2FS_DEBUG */
82 * raw ext2 inode to inode
85 ext2_ei2i(struct ext2fs_dinode *ei, struct inode *ip)
89 ip->i_nlink = ei->e2di_nlink;
90 /* Godmar thinks - if the link count is zero, then the inode is
91 unused - according to ext2 standards. Ufs marks this fact
92 by setting i_mode to zero - why ?
93 I can see that this might lead to problems in an undelete.
95 ip->i_mode = ei->e2di_nlink ? ei->e2di_mode : 0;
96 ip->i_size = ei->e2di_size;
97 if (S_ISREG(ip->i_mode))
98 ip->i_size |= ((u_int64_t)ei->e2di_size_high) << 32;
99 ip->i_atime = ei->e2di_atime;
100 ip->i_mtime = ei->e2di_mtime;
101 ip->i_ctime = ei->e2di_ctime;
102 if (E2DI_HAS_XTIME(ip)) {
103 ip->i_atimensec = XTIME_TO_NSEC(ei->e2di_atime_extra);
104 ip->i_mtimensec = XTIME_TO_NSEC(ei->e2di_mtime_extra);
105 ip->i_ctimensec = XTIME_TO_NSEC(ei->e2di_ctime_extra);
106 ip->i_birthtime = ei->e2di_crtime;
107 ip->i_birthnsec = XTIME_TO_NSEC(ei->e2di_crtime_extra);
110 ip->i_flags |= (ei->e2di_flags & EXT2_APPEND) ? SF_APPEND : 0;
111 ip->i_flags |= (ei->e2di_flags & EXT2_IMMUTABLE) ? SF_IMMUTABLE : 0;
112 ip->i_flags |= (ei->e2di_flags & EXT2_NODUMP) ? UF_NODUMP : 0;
113 ip->i_flag |= (ei->e2di_flags & EXT3_INDEX) ? IN_E3INDEX : 0;
114 ip->i_flag |= (ei->e2di_flags & EXT4_EXTENTS) ? IN_E4EXTENTS : 0;
115 ip->i_blocks = ei->e2di_nblock;
116 if (E2DI_HAS_HUGE_FILE(ip)) {
117 ip->i_blocks |= (uint64_t)ei->e2di_nblock_high << 32;
118 if (ei->e2di_flags & EXT4_HUGE_FILE)
119 ip->i_blocks = fsbtodb(ip->i_e2fs, ip->i_blocks);
121 ip->i_gen = ei->e2di_gen;
122 ip->i_uid = ei->e2di_uid;
123 ip->i_gid = ei->e2di_gid;
125 for(i = 0; i < NDADDR; i++)
126 ip->i_db[i] = ei->e2di_blocks[i];
127 for(i = 0; i < NIADDR; i++)
128 ip->i_ib[i] = ei->e2di_blocks[EXT2_NDIR_BLOCKS + i];
132 * inode to raw ext2 inode
135 ext2_i2ei(struct inode *ip, struct ext2fs_dinode *ei)
139 ei->e2di_mode = ip->i_mode;
140 ei->e2di_nlink = ip->i_nlink;
142 Godmar thinks: if dtime is nonzero, ext2 says this inode
143 has been deleted, this would correspond to a zero link count
145 ei->e2di_dtime = ei->e2di_nlink ? 0 : ip->i_mtime;
146 ei->e2di_size = ip->i_size;
147 if (S_ISREG(ip->i_mode))
148 ei->e2di_size_high = ip->i_size >> 32;
149 ei->e2di_atime = ip->i_atime;
150 ei->e2di_mtime = ip->i_mtime;
151 ei->e2di_ctime = ip->i_ctime;
152 if (E2DI_HAS_XTIME(ip)) {
153 ei->e2di_ctime_extra = NSEC_TO_XTIME(ip->i_ctimensec);
154 ei->e2di_mtime_extra = NSEC_TO_XTIME(ip->i_mtimensec);
155 ei->e2di_atime_extra = NSEC_TO_XTIME(ip->i_atimensec);
156 ei->e2di_crtime = ip->i_birthtime;
157 ei->e2di_crtime_extra = NSEC_TO_XTIME(ip->i_birthnsec);
160 ei->e2di_flags |= (ip->i_flags & SF_APPEND) ? EXT2_APPEND: 0;
161 ei->e2di_flags |= (ip->i_flags & SF_IMMUTABLE) ? EXT2_IMMUTABLE: 0;
162 ei->e2di_flags |= (ip->i_flags & UF_NODUMP) ? EXT2_NODUMP: 0;
163 ei->e2di_flags |= (ip->i_flag & IN_E3INDEX) ? EXT3_INDEX: 0;
164 ei->e2di_flags |= (ip->i_flag & IN_E4EXTENTS) ? EXT4_EXTENTS: 0;
165 ei->e2di_nblock = ip->i_blocks & 0xffffffff;
166 ei->e2di_nblock_high = ip->i_blocks >> 32 & 0xffff;
167 ei->e2di_gen = ip->i_gen;
168 ei->e2di_uid = ip->i_uid;
169 ei->e2di_gid = ip->i_gid;
171 for(i = 0; i < NDADDR; i++)
172 ei->e2di_blocks[i] = ip->i_db[i];
173 for(i = 0; i < NIADDR; i++)
174 ei->e2di_blocks[EXT2_NDIR_BLOCKS + i] = ip->i_ib[i];