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Commit | Line | Data |
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1 | /* | |
2 | * Some non-inline ceph helpers | |
3 | */ | |
4 | #include <linux/module.h> | |
5 | #include <linux/ceph/types.h> | |
6 | ||
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 | ||
31 | int ceph_flags_to_mode(int flags) | |
32 | { | |
33 | int mode; | |
34 | ||
35 | #ifdef O_DIRECTORY /* fixme */ | |
36 | if ((flags & O_DIRECTORY) == O_DIRECTORY) | |
37 | return CEPH_FILE_MODE_PIN; | |
38 | #endif | |
39 | ||
40 | switch (flags & O_ACCMODE) { | |
41 | case O_WRONLY: | |
42 | mode = CEPH_FILE_MODE_WR; | |
43 | break; | |
44 | case O_RDONLY: | |
45 | mode = CEPH_FILE_MODE_RD; | |
46 | break; | |
47 | case O_RDWR: | |
48 | case O_ACCMODE: /* this is what the VFS does */ | |
49 | mode = CEPH_FILE_MODE_RDWR; | |
50 | break; | |
51 | } | |
52 | #ifdef O_LAZY | |
53 | if (flags & O_LAZY) | |
54 | mode |= CEPH_FILE_MODE_LAZY; | |
55 | #endif | |
56 | ||
57 | return mode; | |
58 | } | |
59 | EXPORT_SYMBOL(ceph_flags_to_mode); | |
60 | ||
61 | int ceph_caps_for_mode(int mode) | |
62 | { | |
63 | int caps = CEPH_CAP_PIN; | |
64 | ||
65 | if (mode & CEPH_FILE_MODE_RD) | |
66 | caps |= CEPH_CAP_FILE_SHARED | | |
67 | CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE; | |
68 | if (mode & CEPH_FILE_MODE_WR) | |
69 | caps |= CEPH_CAP_FILE_EXCL | | |
70 | CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER | | |
71 | CEPH_CAP_AUTH_SHARED | CEPH_CAP_AUTH_EXCL | | |
72 | CEPH_CAP_XATTR_SHARED | CEPH_CAP_XATTR_EXCL; | |
73 | if (mode & CEPH_FILE_MODE_LAZY) | |
74 | caps |= CEPH_CAP_FILE_LAZYIO; | |
75 | ||
76 | return caps; | |
77 | } | |
78 | EXPORT_SYMBOL(ceph_caps_for_mode); |