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gerrit-public.fairphone.software / kernel / msm-4.19 / 59f7b5847b0c279d416977d07b7d23aaa7fdc1be / . / net / ceph / ceph_fs.c
blob: 756a2dc10d274be5efda8262296944ef2077d4d3 [file] [log] [blame]
Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +0100[diff] [blame]1// SPDX-License-Identifier: GPL-2.0
Sage Weil0dee3c22009-10-06 11:31:06 -0700[diff] [blame]2/*
3 * Some non-inline ceph helpers
4 */
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700[diff] [blame]5#include <linux/module.h>
6#include <linux/ceph/types.h>
Sage Weil0dee3c22009-10-06 11:31:06 -0700[diff] [blame]7
Sage Weil752727a2009-10-09 16:38:45 -0700[diff] [blame]8/*
9 * return true if @layout appears to be valid
10 */
11int ceph_file_layout_is_valid(const struct ceph_file_layout *layout)
12{
Yan, Zheng76271512016-02-03 21:24:49 +0800[diff] [blame]13 __u32 su = layout->stripe_unit;
14 __u32 sc = layout->stripe_count;
15 __u32 os = layout->object_size;
Sage Weil752727a2009-10-09 16:38:45 -0700[diff] [blame]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
Yan, Zheng76271512016-02-03 21:24:49 +0800[diff] [blame]31void 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);
Yan, Zheng3890dce2016-11-09 16:42:48 +0800[diff] [blame]38 if (fl->pool_id == 0 && fl->stripe_unit == 0 &&
39 fl->stripe_count == 0 && fl->object_size == 0)
Yan, Zheng76271512016-02-03 21:24:49 +0800[diff] [blame]40 fl->pool_id = -1;
41}
42EXPORT_SYMBOL(ceph_file_layout_from_legacy);
43
44void 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}
55EXPORT_SYMBOL(ceph_file_layout_to_legacy);
Sage Weil752727a2009-10-09 16:38:45 -0700[diff] [blame]56
Sage Weil0dee3c22009-10-06 11:31:06 -0700[diff] [blame]57int ceph_flags_to_mode(int flags)
58{
Sage Weil84d95092010-05-25 16:46:24 -0700[diff] [blame]59 int mode;
60
Sage Weil0dee3c22009-10-06 11:31:06 -0700[diff] [blame]61#ifdef O_DIRECTORY /* fixme */
62 if ((flags & O_DIRECTORY) == O_DIRECTORY)
63 return CEPH_FILE_MODE_PIN;
64#endif
Sage Weil0dee3c22009-10-06 11:31:06 -0700[diff] [blame]65
Sage Weil38be7a72011-07-19 11:25:04 -0700[diff] [blame]66 switch (flags & O_ACCMODE) {
67 case O_WRONLY:
Sage Weil84d95092010-05-25 16:46:24 -0700[diff] [blame]68 mode = CEPH_FILE_MODE_WR;
Sage Weil38be7a72011-07-19 11:25:04 -0700[diff] [blame]69 break;
70 case O_RDONLY:
Sage Weil84d95092010-05-25 16:46:24 -0700[diff] [blame]71 mode = CEPH_FILE_MODE_RD;
Sage Weil38be7a72011-07-19 11:25:04 -0700[diff] [blame]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 }
Sage Weil84d95092010-05-25 16:46:24 -0700[diff] [blame]78#ifdef O_LAZY
79 if (flags & O_LAZY)
80 mode |= CEPH_FILE_MODE_LAZY;
81#endif
82
83 return mode;
Sage Weil0dee3c22009-10-06 11:31:06 -0700[diff] [blame]84}
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700[diff] [blame]85EXPORT_SYMBOL(ceph_flags_to_mode);
Sage Weil0dee3c22009-10-06 11:31:06 -0700[diff] [blame]86
87int ceph_caps_for_mode(int mode)
88{
Sage Weil84d95092010-05-25 16:46:24 -0700[diff] [blame]89 int caps = CEPH_CAP_PIN;
90
91 if (mode & CEPH_FILE_MODE_RD)
92 caps |= CEPH_CAP_FILE_SHARED |
Sage Weil0dee3c22009-10-06 11:31:06 -0700[diff] [blame]93 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE;
Sage Weil84d95092010-05-25 16:46:24 -0700[diff] [blame]94 if (mode & CEPH_FILE_MODE_WR)
95 caps |= CEPH_CAP_FILE_EXCL |
Sage Weil0dee3c22009-10-06 11:31:06 -0700[diff] [blame]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;
Sage Weil84d95092010-05-25 16:46:24 -0700[diff] [blame]99 if (mode & CEPH_FILE_MODE_LAZY)
100 caps |= CEPH_CAP_FILE_LAZYIO;
101
102 return caps;
Sage Weil0dee3c22009-10-06 11:31:06 -0700[diff] [blame]103}
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700[diff] [blame]104EXPORT_SYMBOL(ceph_caps_for_mode);