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3cafd875 DC |
1 | /* |
2 | * Copyright (c) 2013 Red Hat, Inc. | |
3 | * All Rights Reserved. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of the GNU General Public License as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it would be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
17 | */ | |
18 | ||
6b803e5a | 19 | #include "libxfs.h" |
3cafd875 DC |
20 | #include "type.h" |
21 | #include "faddr.h" | |
22 | #include "fprint.h" | |
23 | #include "field.h" | |
24 | #include "bit.h" | |
25 | #include "init.h" | |
26 | ||
27 | ||
28 | /* | |
29 | * XXX: no idea how to handle multiple contiguous block symlinks here. | |
30 | */ | |
31 | static int | |
32 | symlink_count( | |
33 | void *obj, | |
34 | int startoff) | |
35 | { | |
36 | struct xfs_dsymlink_hdr *hdr = obj; | |
37 | ||
38 | ASSERT(startoff == 0); | |
39 | ||
40 | if (hdr->sl_magic != cpu_to_be32(XFS_SYMLINK_MAGIC)) | |
41 | return 0; | |
42 | if (be32_to_cpu(hdr->sl_bytes) + sizeof(*hdr) > mp->m_sb.sb_blocksize) | |
43 | return mp->m_sb.sb_blocksize - sizeof(*hdr); | |
44 | return be32_to_cpu(hdr->sl_bytes); | |
45 | } | |
46 | ||
47 | int | |
48 | symlink_size( | |
49 | void *obj, | |
50 | int startoff, | |
51 | int idx) | |
52 | { | |
53 | struct xfs_dsymlink_hdr *hdr = obj; | |
54 | ||
55 | ASSERT(startoff == 0); | |
56 | if (hdr->sl_magic != cpu_to_be32(XFS_SYMLINK_MAGIC)) | |
57 | return 0; | |
58 | return be32_to_cpu(hdr->sl_bytes) + sizeof(*hdr); | |
59 | } | |
60 | ||
61 | const struct field symlink_crc_hfld[] = { | |
62 | { "", FLDT_SYMLINK_CRC, OI(0), C1, 0, TYP_NONE }, | |
63 | { NULL } | |
64 | }; | |
65 | ||
66 | #define OFF(f) bitize(offsetof(struct xfs_dsymlink_hdr, sl_ ## f)) | |
67 | #define SZOF(f) bitize(sizeof(struct xfs_dsymlink_hdr)) | |
68 | const struct field symlink_crc_flds[] = { | |
69 | { "magic", FLDT_UINT32X, OI(OFF(magic)), C1, 0, TYP_NONE }, | |
70 | { "offset", FLDT_UINT32D, OI(OFF(offset)), C1, 0, TYP_NONE }, | |
71 | { "bytes", FLDT_UINT32D, OI(OFF(bytes)), C1, 0, TYP_NONE }, | |
0522f1cc | 72 | { "crc", FLDT_CRC, OI(OFF(crc)), C1, 0, TYP_NONE }, |
3cafd875 DC |
73 | { "uuid", FLDT_UUID, OI(OFF(uuid)), C1, 0, TYP_NONE }, |
74 | { "owner", FLDT_INO, OI(OFF(owner)), C1, 0, TYP_NONE }, | |
75 | { "bno", FLDT_DFSBNO, OI(OFF(blkno)), C1, 0, TYP_BMAPBTD }, | |
76 | { "lsn", FLDT_UINT64X, OI(OFF(lsn)), C1, 0, TYP_NONE }, | |
77 | { "data", FLDT_CHARNS, OI(bitize(sizeof(struct xfs_dsymlink_hdr))), | |
78 | symlink_count, FLD_COUNT, TYP_NONE }, | |
79 | { NULL } | |
80 | }; |