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Commit | Line | Data |
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0dee3c28 SW |
1 | /* |
2 | * Some non-inline ceph helpers | |
3 | */ | |
3d14c5d2 YS |
4 | #include <linux/module.h> |
5 | #include <linux/ceph/types.h> | |
0dee3c28 | 6 | |
752727a1 SW |
7 | /* |
8 | * return true if @layout appears to be valid | |
9 | */ | |
10 | int ceph_file_layout_is_valid(const struct ceph_file_layout *layout) | |
11 | { | |
12 | __u32 su = le32_to_cpu(layout->fl_stripe_unit); | |
13 | __u32 sc = le32_to_cpu(layout->fl_stripe_count); | |
14 | __u32 os = le32_to_cpu(layout->fl_object_size); | |
15 | ||
16 | /* stripe unit, object size must be non-zero, 64k increment */ | |
17 | if (!su || (su & (CEPH_MIN_STRIPE_UNIT-1))) | |
18 | return 0; | |
19 | if (!os || (os & (CEPH_MIN_STRIPE_UNIT-1))) | |
20 | return 0; | |
21 | /* object size must be a multiple of stripe unit */ | |
22 | if (os < su || os % su) | |
23 | return 0; | |
24 | /* stripe count must be non-zero */ | |
25 | if (!sc) | |
26 | return 0; | |
27 | return 1; | |
28 | } | |
29 | ||
30 | ||
0dee3c28 SW |
31 | int ceph_flags_to_mode(int flags) |
32 | { | |
84d95092 SW |
33 | int mode; |
34 | ||
0dee3c28 SW |
35 | #ifdef O_DIRECTORY /* fixme */ |
36 | if ((flags & O_DIRECTORY) == O_DIRECTORY) | |
37 | return CEPH_FILE_MODE_PIN; | |
38 | #endif | |
84d95092 SW |
39 | if ((flags & O_APPEND) == O_APPEND) |
40 | flags |= O_WRONLY; | |
41 | ||
42 | if ((flags & O_ACCMODE) == O_RDWR) | |
43 | mode = CEPH_FILE_MODE_RDWR; | |
44 | else if ((flags & O_ACCMODE) == O_WRONLY) | |
45 | mode = CEPH_FILE_MODE_WR; | |
46 | else | |
47 | mode = CEPH_FILE_MODE_RD; | |
48 | ||
0dee3c28 SW |
49 | #ifdef O_LAZY |
50 | if (flags & O_LAZY) | |
84d95092 | 51 | mode |= CEPH_FILE_MODE_LAZY; |
0dee3c28 | 52 | #endif |
0dee3c28 | 53 | |
84d95092 | 54 | return mode; |
0dee3c28 | 55 | } |
3d14c5d2 | 56 | EXPORT_SYMBOL(ceph_flags_to_mode); |
0dee3c28 SW |
57 | |
58 | int ceph_caps_for_mode(int mode) | |
59 | { | |
84d95092 SW |
60 | int caps = CEPH_CAP_PIN; |
61 | ||
62 | if (mode & CEPH_FILE_MODE_RD) | |
63 | caps |= CEPH_CAP_FILE_SHARED | | |
0dee3c28 | 64 | CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE; |
84d95092 SW |
65 | if (mode & CEPH_FILE_MODE_WR) |
66 | caps |= CEPH_CAP_FILE_EXCL | | |
0dee3c28 SW |
67 | CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER | |
68 | CEPH_CAP_AUTH_SHARED | CEPH_CAP_AUTH_EXCL | | |
69 | CEPH_CAP_XATTR_SHARED | CEPH_CAP_XATTR_EXCL; | |
84d95092 SW |
70 | if (mode & CEPH_FILE_MODE_LAZY) |
71 | caps |= CEPH_CAP_FILE_LAZYIO; | |
72 | ||
73 | return caps; | |
0dee3c28 | 74 | } |
3d14c5d2 | 75 | EXPORT_SYMBOL(ceph_caps_for_mode); |