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