projects / linux-2.6-block.git / blame
| 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 | { | |
| 32 | #ifdef O_DIRECTORY /* fixme */ | |
| 33 | if ((flags & O_DIRECTORY) == O_DIRECTORY) | |
| 34 | return CEPH_FILE_MODE_PIN; | |
| 35 | #endif | |
| 36 | #ifdef O_LAZY | |
| 37 | if (flags & O_LAZY) | |
| 38 | return CEPH_FILE_MODE_LAZY; | |
| 39 | #endif | |
| 40 | if ((flags & O_APPEND) == O_APPEND) | |
| 41 | flags |= O_WRONLY; | |
| 42 | ||
| 43 | flags &= O_ACCMODE; | |
| 44 | if ((flags & O_RDWR) == O_RDWR) | |
| 45 | return CEPH_FILE_MODE_RDWR; | |
| 46 | if ((flags & O_WRONLY) == O_WRONLY) | |
| 47 | return CEPH_FILE_MODE_WR; | |
| 48 | return CEPH_FILE_MODE_RD; | |
| 49 | } | |
| 50 | ||
| 51 | int ceph_caps_for_mode(int mode) | |
| 52 | { | |
| 53 | switch (mode) { | |
| 54 | case CEPH_FILE_MODE_PIN: | |
| 55 | return CEPH_CAP_PIN; | |
| 56 | case CEPH_FILE_MODE_RD: | |
| 57 | return CEPH_CAP_PIN | CEPH_CAP_FILE_SHARED | | |
| 58 | CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE; | |
| 59 | case CEPH_FILE_MODE_RDWR: | |
| 60 | return CEPH_CAP_PIN | CEPH_CAP_FILE_SHARED | | |
| 61 | CEPH_CAP_FILE_EXCL | | |
| 62 | CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE | | |
| 63 | CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER | | |
| 64 | CEPH_CAP_AUTH_SHARED | CEPH_CAP_AUTH_EXCL | | |
| 65 | CEPH_CAP_XATTR_SHARED | CEPH_CAP_XATTR_EXCL; | |
| 66 | case CEPH_FILE_MODE_WR: | |
| 67 | return CEPH_CAP_PIN | CEPH_CAP_FILE_SHARED | | |
| 68 | CEPH_CAP_FILE_EXCL | | |
| 69 | CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER | | |
| 70 | CEPH_CAP_AUTH_SHARED | CEPH_CAP_AUTH_EXCL | | |
| 71 | CEPH_CAP_XATTR_SHARED | CEPH_CAP_XATTR_EXCL; | |
| 72 | } | |
| 73 | return 0; | |
| 74 | } |