| 1 | |
| 2 | |
| 3 | * Some non-inline ceph helpers
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| 4 |
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| 5 | #include <linux/module.h>
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| 6 | #include <linux/ceph/types.h>
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| 7 |
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| 8 | |
| 9 | * return true if @layout appears to be valid
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| 10 |
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| 11 | int ceph_file_layout_is_valid(const struct ceph_file_layout *layout)
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| 12 | {
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| 13 | __u32 su = layout->stripe_unit;
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| 14 | __u32 sc = layout->stripe_count;
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| 15 | __u32 os = layout->object_size;
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| 16 |
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| 17 |
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| 18 | if (!su || (su & (CEPH_MIN_STRIPE_UNIT-1)))
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| 19 | return 0;
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| 20 | if (!os || (os & (CEPH_MIN_STRIPE_UNIT-1)))
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| 21 | return 0;
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| 22 |
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| 23 | if (os < su || os % su)
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| 24 | return 0;
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| 25 |
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| 26 | if (!sc)
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| 27 | return 0;
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| 28 | return 1;
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| 29 | }
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| 30 |
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| 31 | void ceph_file_layout_from_legacy(struct ceph_file_layout *fl,
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| 32 | struct ceph_file_layout_legacy *legacy)
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| 33 | {
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| 34 | fl->stripe_unit = le32_to_cpu(legacy->fl_stripe_unit);
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| 35 | fl->stripe_count = le32_to_cpu(legacy->fl_stripe_count);
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| 36 | fl->object_size = le32_to_cpu(legacy->fl_object_size);
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| 37 | fl->pool_id = le32_to_cpu(legacy->fl_pg_pool);
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| 38 | if (fl->pool_id == 0 && fl->stripe_unit == 0 &&
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| 39 | fl->stripe_count == 0 && fl->object_size == 0)
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| 40 | fl->pool_id = -1;
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| 41 | }
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| 42 |
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| 43 | void ceph_file_layout_to_legacy(struct ceph_file_layout *fl,
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| 44 | struct ceph_file_layout_legacy *legacy)
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| 45 | {
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| 46 | legacy->fl_stripe_unit = cpu_to_le32(fl->stripe_unit);
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| 47 | legacy->fl_stripe_count = cpu_to_le32(fl->stripe_count);
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| 48 | legacy->fl_object_size = cpu_to_le32(fl->object_size);
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| 49 | if (fl->pool_id >= 0)
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| 50 | legacy->fl_pg_pool = cpu_to_le32(fl->pool_id);
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| 51 | else
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| 52 | legacy->fl_pg_pool = 0;
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| 53 | }
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| 54 |
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| 55 | int ceph_flags_to_mode(int flags)
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| 56 | {
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| 57 | int mode;
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| 58 |
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| 59 | #ifdef O_DIRECTORY
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| 60 | if ((flags & O_DIRECTORY) == O_DIRECTORY)
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| 61 | return CEPH_FILE_MODE_PIN;
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| 62 | #endif
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| 63 |
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| 64 | switch (flags & O_ACCMODE) {
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| 65 | case O_WRONLY:
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| 66 | mode = CEPH_FILE_MODE_WR;
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| 67 | break;
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| 68 | case O_RDONLY:
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| 69 | mode = CEPH_FILE_MODE_RD;
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| 70 | break;
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| 71 | case O_RDWR:
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| 72 | case O_ACCMODE:
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| 73 | mode = CEPH_FILE_MODE_RDWR;
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| 74 | break;
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| 75 | }
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| 76 | #ifdef O_LAZY
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| 77 | if (flags & O_LAZY)
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| 78 | mode |= CEPH_FILE_MODE_LAZY;
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| 79 | #endif
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| 80 |
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| 81 | return mode;
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| 82 | }
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| 83 |
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| 84 | int ceph_caps_for_mode(int mode)
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| 85 | {
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| 86 | int caps = CEPH_CAP_PIN;
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| 87 |
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| 88 | if (mode & CEPH_FILE_MODE_RD)
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| 89 | caps |= CEPH_CAP_FILE_SHARED |
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| 90 | CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE;
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| 91 | if (mode & CEPH_FILE_MODE_WR)
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| 92 | caps |= CEPH_CAP_FILE_EXCL |
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| 93 | CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER |
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| 94 | CEPH_CAP_AUTH_SHARED | CEPH_CAP_AUTH_EXCL |
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| 95 | CEPH_CAP_XATTR_SHARED | CEPH_CAP_XATTR_EXCL;
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| 96 | if (mode & CEPH_FILE_MODE_LAZY)
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| 97 | caps |= CEPH_CAP_FILE_LAZYIO;
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| 98 |
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| 99 | return caps;
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| 100 | }
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