2 * Some non-inline ceph helpers
4 #include <linux/module.h>
5 #include <linux/ceph/types.h>
8 * return true if @layout appears to be valid
10 int ceph_file_layout_is_valid(const struct ceph_file_layout *layout)
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);
16 /* stripe unit, object size must be non-zero, 64k increment */
17 if (!su || (su & (CEPH_MIN_STRIPE_UNIT-1)))
19 if (!os || (os & (CEPH_MIN_STRIPE_UNIT-1)))
21 /* object size must be a multiple of stripe unit */
22 if (os < su || os % su)
24 /* stripe count must be non-zero */
31 int ceph_flags_to_mode(int flags)
35 #ifdef O_DIRECTORY /* fixme */
36 if ((flags & O_DIRECTORY) == O_DIRECTORY)
37 return CEPH_FILE_MODE_PIN;
40 switch (flags & O_ACCMODE) {
42 mode = CEPH_FILE_MODE_WR;
45 mode = CEPH_FILE_MODE_RD;
48 case O_ACCMODE: /* this is what the VFS does */
49 mode = CEPH_FILE_MODE_RDWR;
54 mode |= CEPH_FILE_MODE_LAZY;
59 EXPORT_SYMBOL(ceph_flags_to_mode);
61 int ceph_caps_for_mode(int mode)
63 int caps = CEPH_CAP_PIN;
65 if (mode & CEPH_FILE_MODE_RD)
66 caps |= CEPH_CAP_FILE_SHARED |
67 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE;
68 if (mode & CEPH_FILE_MODE_WR)
69 caps |= CEPH_CAP_FILE_EXCL |
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;
73 if (mode & CEPH_FILE_MODE_LAZY)
74 caps |= CEPH_CAP_FILE_LAZYIO;
78 EXPORT_SYMBOL(ceph_caps_for_mode);