1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2013 Red Hat, Inc.
* All Rights Reserved.
*/
#include "libxfs.h"
#include "type.h"
#include "faddr.h"
#include "fprint.h"
#include "field.h"
#include "bit.h"
#include "init.h"
#include "symlink.h"
/*
* XXX: no idea how to handle multiple contiguous block symlinks here.
*/
static int
symlink_count(
void *obj,
int startoff)
{
struct xfs_dsymlink_hdr *hdr = obj;
ASSERT(startoff == 0);
if (hdr->sl_magic != cpu_to_be32(XFS_SYMLINK_MAGIC))
return 0;
if (be32_to_cpu(hdr->sl_bytes) + sizeof(*hdr) > mp->m_sb.sb_blocksize)
return mp->m_sb.sb_blocksize - sizeof(*hdr);
return be32_to_cpu(hdr->sl_bytes);
}
int
symlink_size(
void *obj,
int startoff,
int idx)
{
struct xfs_dsymlink_hdr *hdr = obj;
ASSERT(startoff == 0);
if (hdr->sl_magic != cpu_to_be32(XFS_SYMLINK_MAGIC))
return 0;
return be32_to_cpu(hdr->sl_bytes) + sizeof(*hdr);
}
const struct field symlink_crc_hfld[] = {
{ "", FLDT_SYMLINK_CRC, OI(0), C1, 0, TYP_NONE },
{ NULL }
};
#define OFF(f) bitize(offsetof(struct xfs_dsymlink_hdr, sl_ ## f))
const struct field symlink_crc_flds[] = {
{ "magic", FLDT_UINT32X, OI(OFF(magic)), C1, 0, TYP_NONE },
{ "offset", FLDT_UINT32D, OI(OFF(offset)), C1, 0, TYP_NONE },
{ "bytes", FLDT_UINT32D, OI(OFF(bytes)), C1, 0, TYP_NONE },
{ "crc", FLDT_CRC, OI(OFF(crc)), C1, 0, TYP_NONE },
{ "uuid", FLDT_UUID, OI(OFF(uuid)), C1, 0, TYP_NONE },
{ "owner", FLDT_INO, OI(OFF(owner)), C1, 0, TYP_NONE },
{ "bno", FLDT_DFSBNO, OI(OFF(blkno)), C1, 0, TYP_BMAPBTD },
{ "lsn", FLDT_UINT64X, OI(OFF(lsn)), C1, 0, TYP_NONE },
{ "data", FLDT_CHARNS, OI(bitize(sizeof(struct xfs_dsymlink_hdr))),
symlink_count, FLD_COUNT, TYP_NONE },
{ NULL }
};
|
