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libceph: support the RADOS copy-from operation

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Add support for performing remote object copies using the 'copy-from'
operation.

[ Add COPY_FROM to get_num_data_items(). ]

Signed-off-by: Luis Henriques <lhenriques@suse.com>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Luis Henriques
2018-10-15 16:45:58 +01:00
committed by Ilya Dryomov
parent 2ee9dd958d
commit 23ddf9bea9
3 changed files with 135 additions and 0 deletions
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28
include/linux/ceph/rados.h
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@@ -410,6 +410,14 @@ enum {
enum {
CEPH_OSD_OP_FLAG_EXCL = 1, /* EXCL object create */
CEPH_OSD_OP_FLAG_FAILOK = 2, /* continue despite failure */
CEPH_OSD_OP_FLAG_FADVISE_RANDOM = 0x4, /* the op is random */
CEPH_OSD_OP_FLAG_FADVISE_SEQUENTIAL = 0x8, /* the op is sequential */
CEPH_OSD_OP_FLAG_FADVISE_WILLNEED = 0x10,/* data will be accessed in
the near future */
CEPH_OSD_OP_FLAG_FADVISE_DONTNEED = 0x20,/* data will not be accessed
in the near future */
CEPH_OSD_OP_FLAG_FADVISE_NOCACHE = 0x40,/* data will be accessed only
once by this client */
};
#define EOLDSNAPC ERESTART /* ORDERSNAP flag set; writer has old snapc*/
@@ -431,6 +439,15 @@ enum {
CEPH_OSD_CMPXATTR_MODE_U64 = 2
};
enum {
CEPH_OSD_COPY_FROM_FLAG_FLUSH = 1, /* part of a flush operation */
CEPH_OSD_COPY_FROM_FLAG_IGNORE_OVERLAY = 2, /* ignore pool overlay */
CEPH_OSD_COPY_FROM_FLAG_IGNORE_CACHE = 4, /* ignore osd cache logic */
CEPH_OSD_COPY_FROM_FLAG_MAP_SNAP_CLONE = 8, /* map snap direct to
* cloneid */
CEPH_OSD_COPY_FROM_FLAG_RWORDERED = 16, /* order with write */
};
enum {
CEPH_OSD_WATCH_OP_UNWATCH = 0,
CEPH_OSD_WATCH_OP_LEGACY_WATCH = 1,
@@ -497,6 +514,17 @@ struct ceph_osd_op {
__le64 expected_object_size;
__le64 expected_write_size;
} __attribute__ ((packed)) alloc_hint;
struct {
__le64 snapid;
__le64 src_version;
__u8 flags; /* CEPH_OSD_COPY_FROM_FLAG_* */
/*
* CEPH_OSD_OP_FLAG_FADVISE_*: fadvise flags
* for src object, flags for dest object are in
* ceph_osd_op::flags.
*/
__le32 src_fadvise_flags;
} __attribute__ ((packed)) copy_from;
};
__le32 payload_len;
} __attribute__ ((packed));