1 | // SPDX-License-Identifier: GPL-2.0 |
---|---|
2 | /* |
3 | * Some non-inline ceph helpers |
4 | */ |
5 | #include <linux/module.h> |
6 | #include <linux/ceph/types.h> |
7 | |
8 | /* |
9 | * return true if @layout appears to be valid |
10 | */ |
11 | int ceph_file_layout_is_valid(const struct ceph_file_layout *layout) |
12 | { |
13 | __u32 su = layout->stripe_unit; |
14 | __u32 sc = layout->stripe_count; |
15 | __u32 os = layout->object_size; |
16 | |
17 | /* stripe unit, object size must be non-zero, 64k increment */ |
18 | if (!su || (su & (CEPH_MIN_STRIPE_UNIT-1))) |
19 | return 0; |
20 | if (!os || (os & (CEPH_MIN_STRIPE_UNIT-1))) |
21 | return 0; |
22 | /* object size must be a multiple of stripe unit */ |
23 | if (os < su || os % su) |
24 | return 0; |
25 | /* stripe count must be non-zero */ |
26 | if (!sc) |
27 | return 0; |
28 | return 1; |
29 | } |
30 | |
31 | void ceph_file_layout_from_legacy(struct ceph_file_layout *fl, |
32 | struct ceph_file_layout_legacy *legacy) |
33 | { |
34 | fl->stripe_unit = le32_to_cpu(legacy->fl_stripe_unit); |
35 | fl->stripe_count = le32_to_cpu(legacy->fl_stripe_count); |
36 | fl->object_size = le32_to_cpu(legacy->fl_object_size); |
37 | fl->pool_id = le32_to_cpu(legacy->fl_pg_pool); |
38 | if (fl->pool_id == 0 && fl->stripe_unit == 0 && |
39 | fl->stripe_count == 0 && fl->object_size == 0) |
40 | fl->pool_id = -1; |
41 | } |
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 | |
55 | int ceph_flags_to_mode(int flags) |
56 | { |
57 | int mode; |
58 | |
59 | #ifdef O_DIRECTORY /* fixme */ |
60 | if ((flags & O_DIRECTORY) == O_DIRECTORY) |
61 | return CEPH_FILE_MODE_PIN; |
62 | #endif |
63 | |
64 | switch (flags & O_ACCMODE) { |
65 | case O_WRONLY: |
66 | mode = CEPH_FILE_MODE_WR; |
67 | break; |
68 | case O_RDONLY: |
69 | mode = CEPH_FILE_MODE_RD; |
70 | break; |
71 | case O_RDWR: |
72 | case O_ACCMODE: /* this is what the VFS does */ |
73 | mode = CEPH_FILE_MODE_RDWR; |
74 | break; |
75 | } |
76 | #ifdef O_LAZY |
77 | if (flags & O_LAZY) |
78 | mode |= CEPH_FILE_MODE_LAZY; |
79 | #endif |
80 | |
81 | return mode; |
82 | } |
83 | |
84 | int ceph_caps_for_mode(int mode) |
85 | { |
86 | int caps = CEPH_CAP_PIN; |
87 | |
88 | if (mode & CEPH_FILE_MODE_RD) |
89 | caps |= CEPH_CAP_FILE_SHARED | |
90 | CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE; |
91 | if (mode & CEPH_FILE_MODE_WR) |
92 | caps |= CEPH_CAP_FILE_EXCL | |
93 | CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER | |
94 | CEPH_CAP_AUTH_SHARED | CEPH_CAP_AUTH_EXCL | |
95 | CEPH_CAP_XATTR_SHARED | CEPH_CAP_XATTR_EXCL; |
96 | if (mode & CEPH_FILE_MODE_LAZY) |
97 | caps |= CEPH_CAP_FILE_LAZYIO; |
98 | |
99 | return caps; |
100 | } |
101 |