projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | 39 | |
| 38be7a79 SW |
40 | switch (flags & O_ACCMODE) { |
| 41 | case O_WRONLY: | |
| 84d95092 | 42 | mode = CEPH_FILE_MODE_WR; |
| 38be7a79 SW |
43 | break; |
| 44 | case O_RDONLY: | |
| 84d95092 | 45 | mode = CEPH_FILE_MODE_RD; |
| 38be7a79 SW |
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 | } | |
| 0dee3c28 SW |
52 | #ifdef O_LAZY |
| 53 | if (flags & O_LAZY) | |
| 84d95092 | 54 | mode |= CEPH_FILE_MODE_LAZY; |
| 0dee3c28 | 55 | #endif |
| 0dee3c28 | 56 | |
| 84d95092 | 57 | return mode; |
| 0dee3c28 | 58 | } |
| 3d14c5d2 | 59 | EXPORT_SYMBOL(ceph_flags_to_mode); |
| 0dee3c28 SW |
60 | |
| 61 | int ceph_caps_for_mode(int mode) | |
| 62 | { | |
| 84d95092 SW |
63 | int caps = CEPH_CAP_PIN; |
| 64 | ||
| 65 | if (mode & CEPH_FILE_MODE_RD) | |
| 66 | caps |= CEPH_CAP_FILE_SHARED | | |
| 0dee3c28 | 67 | CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE; |
| 84d95092 SW |
68 | if (mode & CEPH_FILE_MODE_WR) |
| 69 | caps |= CEPH_CAP_FILE_EXCL | | |
| 0dee3c28 SW |
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; | |
| 84d95092 SW |
73 | if (mode & CEPH_FILE_MODE_LAZY) |
| 74 | caps |= CEPH_CAP_FILE_LAZYIO; | |
| 75 | ||
| 76 | return caps; | |
| 0dee3c28 | 77 | } |
| 3d14c5d2 | 78 | EXPORT_SYMBOL(ceph_caps_for_mode); |