projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | /* |
| 2 | * ceph_fs.cc - Some Ceph functions that are shared between kernel space and | |
| 3 | * user space. | |
| 4 | * | |
| 5 | */ | |
| 6 | ||
| 7 | /* | |
| 8 | * Some non-inline ceph helpers | |
| 9 | */ | |
| 10 | #include "include/types.h" | |
| 11 | ||
| 12 | int ceph_flags_to_mode(int flags) | |
| 13 | { | |
| 14 | /* because CEPH_FILE_MODE_PIN is zero, so mode = -1 is error */ | |
| 15 | int mode = -1; | |
| 16 | ||
| 7c673cae FG |
17 | if ((flags & CEPH_O_DIRECTORY) == CEPH_O_DIRECTORY) |
| 18 | return CEPH_FILE_MODE_PIN; | |
| 7c673cae FG |
19 | |
| 20 | switch (flags & O_ACCMODE) { | |
| 21 | case CEPH_O_WRONLY: | |
| 22 | mode = CEPH_FILE_MODE_WR; | |
| 23 | break; | |
| 24 | case CEPH_O_RDONLY: | |
| 25 | mode = CEPH_FILE_MODE_RD; | |
| 26 | break; | |
| 27 | case CEPH_O_RDWR: | |
| 28 | case O_ACCMODE: /* this is what the VFS does */ | |
| 29 | mode = CEPH_FILE_MODE_RDWR; | |
| 30 | break; | |
| 31 | } | |
| 32 | ||
| 11fdf7f2 TL |
33 | if (flags & CEPH_O_LAZY) |
| 34 | mode |= CEPH_FILE_MODE_LAZY; | |
| 35 | ||
| 7c673cae FG |
36 | return mode; |
| 37 | } | |
| 38 | ||
| 39 | int ceph_caps_for_mode(int mode) | |
| 40 | { | |
| 41 | int caps = CEPH_CAP_PIN; | |
| 42 | ||
| 43 | if (mode & CEPH_FILE_MODE_RD) | |
| 44 | caps |= CEPH_CAP_FILE_SHARED | | |
| 45 | CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE; | |
| 46 | if (mode & CEPH_FILE_MODE_WR) | |
| 47 | caps |= CEPH_CAP_FILE_EXCL | | |
| 48 | CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER | | |
| 49 | CEPH_CAP_AUTH_SHARED | CEPH_CAP_AUTH_EXCL | | |
| 50 | CEPH_CAP_XATTR_SHARED | CEPH_CAP_XATTR_EXCL; | |
| 51 | if (mode & CEPH_FILE_MODE_LAZY) | |
| 52 | caps |= CEPH_CAP_FILE_LAZYIO; | |
| 53 | ||
| 54 | return caps; | |
| 55 | } | |
| 56 | ||
| 57 | int ceph_flags_sys2wire(int flags) | |
| 58 | { | |
| 59 | int wire_flags = 0; | |
| 60 | ||
| 61 | switch (flags & O_ACCMODE) { | |
| 62 | case O_RDONLY: | |
| 63 | wire_flags |= CEPH_O_RDONLY; | |
| 64 | break; | |
| 65 | case O_WRONLY: | |
| 66 | wire_flags |= CEPH_O_WRONLY; | |
| 67 | break; | |
| 68 | case O_RDWR: | |
| 69 | wire_flags |= CEPH_O_RDWR; | |
| 70 | break; | |
| 71 | } | |
| 72 | flags &= ~O_ACCMODE; | |
| 73 | ||
| 74 | #define ceph_sys2wire(a) if (flags & a) { wire_flags |= CEPH_##a; flags &= ~a; } | |
| 75 | ||
| 76 | ceph_sys2wire(O_CREAT); | |
| 77 | ceph_sys2wire(O_EXCL); | |
| 78 | ceph_sys2wire(O_TRUNC); | |
| f67539c2 TL |
79 | |
| 80 | #ifndef _WIN32 | |
| 7c673cae FG |
81 | ceph_sys2wire(O_DIRECTORY); |
| 82 | ceph_sys2wire(O_NOFOLLOW); | |
| f67539c2 TL |
83 | // In some cases, FILE_FLAG_BACKUP_SEMANTICS may be used instead |
| 84 | // of O_DIRECTORY. We may need some workarounds in order to handle | |
| 85 | // the fact that those flags are not available on Windows. | |
| 86 | #endif | |
| 7c673cae FG |
87 | |
| 88 | #undef ceph_sys2wire | |
| 89 | ||
| 90 | return wire_flags; | |
| 91 | } |