diff options
| author | M. Mohan Kumar <mohan@in.ibm.com> | 2013-11-13 22:44:43 +0530 |
|---|---|---|
| committer | Anand Avati <avati@redhat.com> | 2013-11-13 11:39:22 -0800 |
| commit | 81a57679c20ac0ac9b48e313af75036132e3a5ad (patch) | |
| tree | c99c3cf75096a2530b65a3bb5b3c19c2c463b7fa /xlators/mgmt/glusterd/src/glusterd-handler.c | |
| parent | b222ce817f5f324fe20d4d3614001ed2f177afb8 (diff) | |
bd: Add support to create clone, snapshot and merge of LV images.
Special xattr names "clone" & "snapshot" can be used to create full and
linked clone of the LV images. GFID of destination posix file (to be
mapped) is passed as a value to the xattr. Destination posix file must
exist before running this operation.
These operations form a basis for offloading storage related operations
from QEMU to GlusterFS.
Syntax for full clone: xattr name: "clone" value: "gfid-of-dest-file"
Syntax for linked clone: xattr name: "snapshot" value: "gfid-of-dest-file"
Syntax for merging: xattr name: "merge" value: "path-to-snapshot-file"
Example:
setfattr -n clone -v <gfid-of-dest-file> /media/source
setfattr -n snapshot -v <gfid-of-dest-file> /media/source
setfattr -n merge -v "/media/sn" /media/sn
Change-Id: Id9f984a709d4c2e52a64ae75bb12a8ecb01f8776
BUG: 1028672
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Reviewed-on: http://review.gluster.org/5626
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>
Diffstat (limited to 'xlators/mgmt/glusterd/src/glusterd-handler.c')
| -rw-r--r-- | xlators/mgmt/glusterd/src/glusterd-handler.c | 39 |
1 files changed, 37 insertions, 2 deletions
diff --git a/xlators/mgmt/glusterd/src/glusterd-handler.c b/xlators/mgmt/glusterd/src/glusterd-handler.c index 181b8fcf1a9..fcffccc07b8 100644 --- a/xlators/mgmt/glusterd/src/glusterd-handler.c +++ b/xlators/mgmt/glusterd/src/glusterd-handler.c @@ -335,7 +335,7 @@ glusterd_add_volume_detail_to_dict (glusterd_volinfo_t *volinfo, char *volume_id_str = NULL; struct args_pack pack = {0,}; xlator_t *this = NULL; - + int caps = 0; GF_ASSERT (volinfo); GF_ASSERT (volumes); @@ -401,6 +401,7 @@ glusterd_add_volume_detail_to_dict (glusterd_volinfo_t *volinfo, #ifdef HAVE_BD_XLATOR if (volinfo->caps) { + caps = 0; snprintf (key, 256, "volume%d.xlator0", count); buf = GF_MALLOC (256, gf_common_mt_char); if (!buf) { @@ -416,7 +417,8 @@ glusterd_add_volume_detail_to_dict (glusterd_volinfo_t *volinfo, } if (volinfo->caps & CAPS_THIN) { - snprintf (key, 256, "volume%d.xlator0.caps0", count); + snprintf (key, 256, "volume%d.xlator0.caps%d", count, + caps++); buf = GF_MALLOC (256, gf_common_mt_char); if (!buf) { ret = ENOMEM; @@ -429,6 +431,39 @@ glusterd_add_volume_detail_to_dict (glusterd_volinfo_t *volinfo, goto out; } } + + if (volinfo->caps & CAPS_OFFLOAD_COPY) { + snprintf (key, 256, "volume%d.xlator0.caps%d", count, + caps++); + buf = GF_MALLOC (256, gf_common_mt_char); + if (!buf) { + ret = ENOMEM; + goto out; + } + snprintf (buf, 256, "offload_copy"); + ret = dict_set_dynstr (volumes, key, buf); + if (ret) { + GF_FREE (buf); + goto out; + } + } + + if (volinfo->caps & CAPS_OFFLOAD_SNAPSHOT) { + snprintf (key, 256, "volume%d.xlator0.caps%d", count, + caps++); + buf = GF_MALLOC (256, gf_common_mt_char); + if (!buf) { + ret = ENOMEM; + goto out; + } + snprintf (buf, 256, "offload_snapshot"); + ret = dict_set_dynstr (volumes, key, buf); + if (ret) { + GF_FREE (buf); + goto out; + } + } + } #endif |