bug.h: work around GCC PR82365 in BUG()
[linux-2.6-microblaze.git] / net / ceph / ceph_fs.c
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 EXPORT_SYMBOL(ceph_file_layout_from_legacy);
43
44 void ceph_file_layout_to_legacy(struct ceph_file_layout *fl,
45                                 struct ceph_file_layout_legacy *legacy)
46 {
47         legacy->fl_stripe_unit = cpu_to_le32(fl->stripe_unit);
48         legacy->fl_stripe_count = cpu_to_le32(fl->stripe_count);
49         legacy->fl_object_size = cpu_to_le32(fl->object_size);
50         if (fl->pool_id >= 0)
51                 legacy->fl_pg_pool = cpu_to_le32(fl->pool_id);
52         else
53                 legacy->fl_pg_pool = 0;
54 }
55 EXPORT_SYMBOL(ceph_file_layout_to_legacy);
56
57 int ceph_flags_to_mode(int flags)
58 {
59         int mode;
60
61 #ifdef O_DIRECTORY  /* fixme */
62         if ((flags & O_DIRECTORY) == O_DIRECTORY)
63                 return CEPH_FILE_MODE_PIN;
64 #endif
65
66         switch (flags & O_ACCMODE) {
67         case O_WRONLY:
68                 mode = CEPH_FILE_MODE_WR;
69                 break;
70         case O_RDONLY:
71                 mode = CEPH_FILE_MODE_RD;
72                 break;
73         case O_RDWR:
74         case O_ACCMODE: /* this is what the VFS does */
75                 mode = CEPH_FILE_MODE_RDWR;
76                 break;
77         }
78 #ifdef O_LAZY
79         if (flags & O_LAZY)
80                 mode |= CEPH_FILE_MODE_LAZY;
81 #endif
82
83         return mode;
84 }
85 EXPORT_SYMBOL(ceph_flags_to_mode);
86
87 int ceph_caps_for_mode(int mode)
88 {
89         int caps = CEPH_CAP_PIN;
90
91         if (mode & CEPH_FILE_MODE_RD)
92                 caps |= CEPH_CAP_FILE_SHARED |
93                         CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE;
94         if (mode & CEPH_FILE_MODE_WR)
95                 caps |= CEPH_CAP_FILE_EXCL |
96                         CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER |
97                         CEPH_CAP_AUTH_SHARED | CEPH_CAP_AUTH_EXCL |
98                         CEPH_CAP_XATTR_SHARED | CEPH_CAP_XATTR_EXCL;
99         if (mode & CEPH_FILE_MODE_LAZY)
100                 caps |= CEPH_CAP_FILE_LAZYIO;
101
102         return caps;
103 }
104 EXPORT_SYMBOL(ceph_caps_for_mode);