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 | { | |
7627151e YZ |
12 | __u32 su = layout->stripe_unit; |
13 | __u32 sc = layout->stripe_count; | |
14 | __u32 os = layout->object_size; | |
752727a1 SW |
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 | ||
7627151e YZ |
30 | void ceph_file_layout_from_legacy(struct ceph_file_layout *fl, |
31 | struct ceph_file_layout_legacy *legacy) | |
32 | { | |
33 | fl->stripe_unit = le32_to_cpu(legacy->fl_stripe_unit); | |
34 | fl->stripe_count = le32_to_cpu(legacy->fl_stripe_count); | |
35 | fl->object_size = le32_to_cpu(legacy->fl_object_size); | |
36 | fl->pool_id = le32_to_cpu(legacy->fl_pg_pool); | |
3890dce1 YZ |
37 | if (fl->pool_id == 0 && fl->stripe_unit == 0 && |
38 | fl->stripe_count == 0 && fl->object_size == 0) | |
7627151e YZ |
39 | fl->pool_id = -1; |
40 | } | |
41 | EXPORT_SYMBOL(ceph_file_layout_from_legacy); | |
42 | ||
43 | void ceph_file_layout_to_legacy(struct ceph_file_layout *fl, | |
44 | struct ceph_file_layout_legacy *legacy) | |
45 | { | |
46 | legacy->fl_stripe_unit = cpu_to_le32(fl->stripe_unit); | |
47 | legacy->fl_stripe_count = cpu_to_le32(fl->stripe_count); | |
48 | legacy->fl_object_size = cpu_to_le32(fl->object_size); | |
49 | if (fl->pool_id >= 0) | |
50 | legacy->fl_pg_pool = cpu_to_le32(fl->pool_id); | |
51 | else | |
52 | legacy->fl_pg_pool = 0; | |
53 | } | |
54 | EXPORT_SYMBOL(ceph_file_layout_to_legacy); | |
752727a1 | 55 | |
0dee3c28 SW |
56 | int ceph_flags_to_mode(int flags) |
57 | { | |
84d95092 SW |
58 | int mode; |
59 | ||
0dee3c28 SW |
60 | #ifdef O_DIRECTORY /* fixme */ |
61 | if ((flags & O_DIRECTORY) == O_DIRECTORY) | |
62 | return CEPH_FILE_MODE_PIN; | |
63 | #endif | |
84d95092 | 64 | |
38be7a79 SW |
65 | switch (flags & O_ACCMODE) { |
66 | case O_WRONLY: | |
84d95092 | 67 | mode = CEPH_FILE_MODE_WR; |
38be7a79 SW |
68 | break; |
69 | case O_RDONLY: | |
84d95092 | 70 | mode = CEPH_FILE_MODE_RD; |
38be7a79 SW |
71 | break; |
72 | case O_RDWR: | |
73 | case O_ACCMODE: /* this is what the VFS does */ | |
74 | mode = CEPH_FILE_MODE_RDWR; | |
75 | break; | |
76 | } | |
0dee3c28 SW |
77 | #ifdef O_LAZY |
78 | if (flags & O_LAZY) | |
84d95092 | 79 | mode |= CEPH_FILE_MODE_LAZY; |
0dee3c28 | 80 | #endif |
0dee3c28 | 81 | |
84d95092 | 82 | return mode; |
0dee3c28 | 83 | } |
3d14c5d2 | 84 | EXPORT_SYMBOL(ceph_flags_to_mode); |
0dee3c28 SW |
85 | |
86 | int ceph_caps_for_mode(int mode) | |
87 | { | |
84d95092 SW |
88 | int caps = CEPH_CAP_PIN; |
89 | ||
90 | if (mode & CEPH_FILE_MODE_RD) | |
91 | caps |= CEPH_CAP_FILE_SHARED | | |
0dee3c28 | 92 | CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE; |
84d95092 SW |
93 | if (mode & CEPH_FILE_MODE_WR) |
94 | caps |= CEPH_CAP_FILE_EXCL | | |
0dee3c28 SW |
95 | CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER | |
96 | CEPH_CAP_AUTH_SHARED | CEPH_CAP_AUTH_EXCL | | |
97 | CEPH_CAP_XATTR_SHARED | CEPH_CAP_XATTR_EXCL; | |
84d95092 SW |
98 | if (mode & CEPH_FILE_MODE_LAZY) |
99 | caps |= CEPH_CAP_FILE_LAZYIO; | |
100 | ||
101 | return caps; | |
0dee3c28 | 102 | } |
3d14c5d2 | 103 | EXPORT_SYMBOL(ceph_caps_for_mode); |