| /* |
| * Some non-inline ceph helpers |
| */ |
| #include <linux/module.h> |
| #include <linux/ceph/types.h> |
| |
| /* |
| * return true if @layout appears to be valid |
| */ |
| int ceph_file_layout_is_valid(const struct ceph_file_layout *layout) |
| { |
| __u32 su = le32_to_cpu(layout->fl_stripe_unit); |
| __u32 sc = le32_to_cpu(layout->fl_stripe_count); |
| __u32 os = le32_to_cpu(layout->fl_object_size); |
| |
| /* stripe unit, object size must be non-zero, 64k increment */ |
| if (!su || (su & (CEPH_MIN_STRIPE_UNIT-1))) |
| return 0; |
| if (!os || (os & (CEPH_MIN_STRIPE_UNIT-1))) |
| return 0; |
| /* object size must be a multiple of stripe unit */ |
| if (os < su || os % su) |
| return 0; |
| /* stripe count must be non-zero */ |
| if (!sc) |
| return 0; |
| return 1; |
| } |
| |
| |
| int ceph_flags_to_mode(int flags) |
| { |
| int mode; |
| |
| #ifdef O_DIRECTORY /* fixme */ |
| if ((flags & O_DIRECTORY) == O_DIRECTORY) |
| return CEPH_FILE_MODE_PIN; |
| #endif |
| |
| switch (flags & O_ACCMODE) { |
| case O_WRONLY: |
| mode = CEPH_FILE_MODE_WR; |
| break; |
| case O_RDONLY: |
| mode = CEPH_FILE_MODE_RD; |
| break; |
| case O_RDWR: |
| case O_ACCMODE: /* this is what the VFS does */ |
| mode = CEPH_FILE_MODE_RDWR; |
| break; |
| } |
| #ifdef O_LAZY |
| if (flags & O_LAZY) |
| mode |= CEPH_FILE_MODE_LAZY; |
| #endif |
| |
| return mode; |
| } |
| EXPORT_SYMBOL(ceph_flags_to_mode); |
| |
| int ceph_caps_for_mode(int mode) |
| { |
| int caps = CEPH_CAP_PIN; |
| |
| if (mode & CEPH_FILE_MODE_RD) |
| caps |= CEPH_CAP_FILE_SHARED | |
| CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE; |
| if (mode & CEPH_FILE_MODE_WR) |
| caps |= CEPH_CAP_FILE_EXCL | |
| CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER | |
| CEPH_CAP_AUTH_SHARED | CEPH_CAP_AUTH_EXCL | |
| CEPH_CAP_XATTR_SHARED | CEPH_CAP_XATTR_EXCL; |
| if (mode & CEPH_FILE_MODE_LAZY) |
| caps |= CEPH_CAP_FILE_LAZYIO; |
| |
| return caps; |
| } |
| EXPORT_SYMBOL(ceph_caps_for_mode); |