2 * SPDX-License-Identifier: MIT-CMU
4 * Copyright (c) 1995 The University of Utah and
5 * the Computer Systems Laboratory at the University of Utah (CSL).
8 * Permission to use, copy, modify and distribute this software is hereby
9 * granted provided that (1) source code retains these copyright, permission,
10 * and disclaimer notices, and (2) redistributions including binaries
11 * reproduce the notices in supporting documentation, and (3) all advertising
12 * materials mentioning features or use of this software display the following
13 * acknowledgement: ``This product includes software developed by the
14 * Computer Systems Laboratory at the University of Utah.''
16 * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
17 * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
18 * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
20 * CSL requests users of this software to return to csl-dist@cs.utah.edu any
21 * improvements that they make and grant CSL redistribution rights.
28 * routines to convert on disk ext2 inodes into inodes and back
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/endian.h>
35 #include <sys/vnode.h>
37 #include <fs/ext2fs/fs.h>
38 #include <fs/ext2fs/inode.h>
39 #include <fs/ext2fs/ext2fs.h>
40 #include <fs/ext2fs/ext2_dinode.h>
41 #include <fs/ext2fs/ext2_extern.h>
43 #define XTIME_TO_NSEC(x) ((x & EXT3_NSEC_MASK) >> 2)
44 #define NSEC_TO_XTIME(t) (le32toh(t << 2) & EXT3_NSEC_MASK)
48 ext2_print_inode(struct inode *in)
51 struct ext4_extent_header *ehp;
52 struct ext4_extent *ep;
54 printf("Inode: %5ju", (uintmax_t)in->i_number);
55 printf( /* "Inode: %5d" */
56 " Type: %10s Mode: 0x%o Flags: 0x%x Version: %d acl: 0x%jx\n",
57 "n/a", in->i_mode, in->i_flags, in->i_gen, in->i_facl);
58 printf("User: %5u Group: %5u Size: %ju\n",
59 in->i_uid, in->i_gid, (uintmax_t)in->i_size);
60 printf("Links: %3d Blockcount: %ju\n",
61 in->i_nlink, (uintmax_t)in->i_blocks);
62 printf("ctime: 0x%x ", in->i_ctime);
63 printf("atime: 0x%x ", in->i_atime);
64 printf("mtime: 0x%x ", in->i_mtime);
65 if (E2DI_HAS_XTIME(in))
66 printf("crtime %#x\n", in->i_birthtime);
69 if (in->i_flag & IN_E4EXTENTS) {
71 ehp = (struct ext4_extent_header *)in->i_db;
72 printf("Header (magic 0x%x entries %d max %d depth %d gen %d)\n",
73 ehp->eh_magic, ehp->eh_ecount, ehp->eh_max, ehp->eh_depth,
75 ep = (struct ext4_extent *)(char *)(ehp + 1);
76 printf("Index (blk %d len %d start_lo %d start_hi %d)\n", ep->e_blk,
77 ep->e_len, ep->e_start_lo, ep->e_start_hi);
81 for (i = 0; i < (in->i_blocks <= 24 ? (in->i_blocks + 1) / 2 : 12); i++)
82 printf(" %d", in->i_db[i]);
86 #endif /* EXT2FS_DEBUG */
89 * raw ext2 inode to inode
92 ext2_ei2i(struct ext2fs_dinode *ei, struct inode *ip)
94 struct m_ext2fs *fs = ip->i_e2fs;
96 if ((ip->i_number < EXT2_FIRST_INO(fs) && ip->i_number != EXT2_ROOTINO) ||
97 (ip->i_number < EXT2_ROOTINO) ||
98 (ip->i_number > fs->e2fs->e2fs_icount)) {
99 printf("ext2fs: bad inode number %ju\n", ip->i_number);
103 if (ip->i_number == EXT2_ROOTINO && ei->e2di_nlink == 0) {
104 printf("ext2fs: root inode unallocated\n");
107 ip->i_nlink = ei->e2di_nlink;
109 /* Check extra inode size */
110 if (EXT2_INODE_SIZE(fs) > E2FS_REV0_INODE_SIZE) {
111 if (E2FS_REV0_INODE_SIZE + ei->e2di_extra_isize >
112 EXT2_INODE_SIZE(fs) || (ei->e2di_extra_isize & 3)) {
113 printf("ext2fs: bad extra inode size %u, inode size=%u\n",
114 ei->e2di_extra_isize, EXT2_INODE_SIZE(fs));
120 * Godmar thinks - if the link count is zero, then the inode is
121 * unused - according to ext2 standards. Ufs marks this fact by
122 * setting i_mode to zero - why ? I can see that this might lead to
123 * problems in an undelete.
125 ip->i_mode = ei->e2di_nlink ? ei->e2di_mode : 0;
126 ip->i_size = ei->e2di_size;
127 if (S_ISREG(ip->i_mode))
128 ip->i_size |= ((u_int64_t)ei->e2di_size_high) << 32;
129 ip->i_atime = ei->e2di_atime;
130 ip->i_mtime = ei->e2di_mtime;
131 ip->i_ctime = ei->e2di_ctime;
132 if (E2DI_HAS_XTIME(ip)) {
133 ip->i_atimensec = XTIME_TO_NSEC(ei->e2di_atime_extra);
134 ip->i_mtimensec = XTIME_TO_NSEC(ei->e2di_mtime_extra);
135 ip->i_ctimensec = XTIME_TO_NSEC(ei->e2di_ctime_extra);
136 ip->i_birthtime = ei->e2di_crtime;
137 ip->i_birthnsec = XTIME_TO_NSEC(ei->e2di_crtime_extra);
140 ip->i_flags |= (ei->e2di_flags & EXT2_APPEND) ? SF_APPEND : 0;
141 ip->i_flags |= (ei->e2di_flags & EXT2_IMMUTABLE) ? SF_IMMUTABLE : 0;
142 ip->i_flags |= (ei->e2di_flags & EXT2_NODUMP) ? UF_NODUMP : 0;
143 ip->i_flag |= (ei->e2di_flags & EXT3_INDEX) ? IN_E3INDEX : 0;
144 ip->i_flag |= (ei->e2di_flags & EXT4_EXTENTS) ? IN_E4EXTENTS : 0;
145 ip->i_blocks = ei->e2di_nblock;
146 ip->i_facl = ei->e2di_facl;
147 if (E2DI_HAS_HUGE_FILE(ip)) {
148 ip->i_blocks |= (uint64_t)ei->e2di_nblock_high << 32;
149 ip->i_facl |= (uint64_t)ei->e2di_facl_high << 32;
150 if (ei->e2di_flags & EXT4_HUGE_FILE)
151 ip->i_blocks = fsbtodb(ip->i_e2fs, ip->i_blocks);
153 ip->i_gen = ei->e2di_gen;
154 ip->i_uid = ei->e2di_uid;
155 ip->i_gid = ei->e2di_gid;
156 ip->i_uid |= (uint32_t)ei->e2di_uid_high << 16;
157 ip->i_gid |= (uint32_t)ei->e2di_gid_high << 16;
159 memcpy(ip->i_data, ei->e2di_blocks, sizeof(ei->e2di_blocks));
161 /* Verify inode csum. */
162 return (ext2_ei_csum_verify(ip, ei));
166 * inode to raw ext2 inode
169 ext2_i2ei(struct inode *ip, struct ext2fs_dinode *ei)
174 ei->e2di_mode = ip->i_mode;
175 ei->e2di_nlink = ip->i_nlink;
177 * Godmar thinks: if dtime is nonzero, ext2 says this inode has been
178 * deleted, this would correspond to a zero link count
180 ei->e2di_dtime = ei->e2di_nlink ? 0 : ip->i_mtime;
181 ei->e2di_size = ip->i_size;
182 if (S_ISREG(ip->i_mode))
183 ei->e2di_size_high = ip->i_size >> 32;
184 ei->e2di_atime = ip->i_atime;
185 ei->e2di_mtime = ip->i_mtime;
186 ei->e2di_ctime = ip->i_ctime;
187 if (E2DI_HAS_XTIME(ip)) {
188 ei->e2di_ctime_extra = NSEC_TO_XTIME(ip->i_ctimensec);
189 ei->e2di_mtime_extra = NSEC_TO_XTIME(ip->i_mtimensec);
190 ei->e2di_atime_extra = NSEC_TO_XTIME(ip->i_atimensec);
191 ei->e2di_crtime = ip->i_birthtime;
192 ei->e2di_crtime_extra = NSEC_TO_XTIME(ip->i_birthnsec);
195 ei->e2di_flags |= (ip->i_flags & SF_APPEND) ? EXT2_APPEND : 0;
196 ei->e2di_flags |= (ip->i_flags & SF_IMMUTABLE) ? EXT2_IMMUTABLE : 0;
197 ei->e2di_flags |= (ip->i_flags & UF_NODUMP) ? EXT2_NODUMP : 0;
198 ei->e2di_flags |= (ip->i_flag & IN_E3INDEX) ? EXT3_INDEX : 0;
199 ei->e2di_flags |= (ip->i_flag & IN_E4EXTENTS) ? EXT4_EXTENTS : 0;
200 if (ip->i_blocks > ~0U &&
201 !EXT2_HAS_RO_COMPAT_FEATURE(fs, EXT2F_ROCOMPAT_HUGE_FILE)) {
202 ext2_fserr(fs, ip->i_uid, "i_blocks value is out of range");
205 if (ip->i_blocks <= 0xffffffffffffULL) {
206 ei->e2di_nblock = ip->i_blocks & 0xffffffff;
207 ei->e2di_nblock_high = ip->i_blocks >> 32 & 0xffff;
209 ei->e2di_flags |= EXT4_HUGE_FILE;
210 ei->e2di_nblock = dbtofsb(fs, ip->i_blocks);
211 ei->e2di_nblock_high = dbtofsb(fs, ip->i_blocks) >> 32 & 0xffff;
213 ei->e2di_facl = ip->i_facl & 0xffffffff;
214 ei->e2di_facl_high = ip->i_facl >> 32 & 0xffff;
215 ei->e2di_gen = ip->i_gen;
216 ei->e2di_uid = ip->i_uid & 0xffff;
217 ei->e2di_uid_high = ip->i_uid >> 16 & 0xffff;
218 ei->e2di_gid = ip->i_gid & 0xffff;
219 ei->e2di_gid_high = ip->i_gid >> 16 & 0xffff;
221 memcpy(ei->e2di_blocks, ip->i_data, sizeof(ei->e2di_blocks));
223 /* Set inode csum. */
224 ext2_ei_csum_set(ip, ei);