blob: 7d54e944de5e0723918d8196e2d10766fd0b84c5 (
plain)
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
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
|
/*
* Some non-inline ceph helpers
*/
#include <linux/module.h>
#include <linux/ceph/types.h>
/*
* return true if @layout appears to be valid
*/
int ceph_file_layout_is_valid(const struct ceph_file_layout *layout)
{
__u32 su = layout->stripe_unit;
__u32 sc = layout->stripe_count;
__u32 os = layout->object_size;
/* stripe unit, object size must be non-zero, 64k increment */
if (!su || (su & (CEPH_MIN_STRIPE_UNIT-1)))
return 0;
if (!os || (os & (CEPH_MIN_STRIPE_UNIT-1)))
return 0;
/* object size must be a multiple of stripe unit */
if (os < su || os % su)
return 0;
/* stripe count must be non-zero */
if (!sc)
return 0;
return 1;
}
void ceph_file_layout_from_legacy(struct ceph_file_layout *fl,
struct ceph_file_layout_legacy *legacy)
{
fl->stripe_unit = le32_to_cpu(legacy->fl_stripe_unit);
fl->stripe_count = le32_to_cpu(legacy->fl_stripe_count);
fl->object_size = le32_to_cpu(legacy->fl_object_size);
fl->pool_id = le32_to_cpu(legacy->fl_pg_pool);
if (fl->pool_id == 0)
fl->pool_id = -1;
}
EXPORT_SYMBOL(ceph_file_layout_from_legacy);
void ceph_file_layout_to_legacy(struct ceph_file_layout *fl,
struct ceph_file_layout_legacy *legacy)
{
legacy->fl_stripe_unit = cpu_to_le32(fl->stripe_unit);
legacy->fl_stripe_count = cpu_to_le32(fl->stripe_count);
legacy->fl_object_size = cpu_to_le32(fl->object_size);
if (fl->pool_id >= 0)
legacy->fl_pg_pool = cpu_to_le32(fl->pool_id);
else
legacy->fl_pg_pool = 0;
}
EXPORT_SYMBOL(ceph_file_layout_to_legacy);
int ceph_flags_to_mode(int flags)
{
int mode;
#ifdef O_DIRECTORY /* fixme */
if ((flags & O_DIRECTORY) == O_DIRECTORY)
return CEPH_FILE_MODE_PIN;
#endif
switch (flags & O_ACCMODE) {
case O_WRONLY:
mode = CEPH_FILE_MODE_WR;
break;
case O_RDONLY:
mode = CEPH_FILE_MODE_RD;
break;
case O_RDWR:
case O_ACCMODE: /* this is what the VFS does */
mode = CEPH_FILE_MODE_RDWR;
break;
}
#ifdef O_LAZY
if (flags & O_LAZY)
mode |= CEPH_FILE_MODE_LAZY;
#endif
return mode;
}
EXPORT_SYMBOL(ceph_flags_to_mode);
int ceph_caps_for_mode(int mode)
{
int caps = CEPH_CAP_PIN;
if (mode & CEPH_FILE_MODE_RD)
caps |= CEPH_CAP_FILE_SHARED |
CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE;
if (mode & CEPH_FILE_MODE_WR)
caps |= CEPH_CAP_FILE_EXCL |
CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER |
CEPH_CAP_AUTH_SHARED | CEPH_CAP_AUTH_EXCL |
CEPH_CAP_XATTR_SHARED | CEPH_CAP_XATTR_EXCL;
if (mode & CEPH_FILE_MODE_LAZY)
caps |= CEPH_CAP_FILE_LAZYIO;
return caps;
}
EXPORT_SYMBOL(ceph_caps_for_mode);
|
