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* storage/posix: Add virtual xattr to fetch path from gfidKotresh HR2017-07-281-0/+184
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The gfid2path infra stores the "pargfid/bname" as on xattr value for each non directory entry. Hardlinks would have a separate xattr. This xattr key is internal and is not exposed to applications. A virtual xattr is exposed for the applications to fetch the path from gfid. Internal xattr: trusted.gfid2path.<xxhash> Virtual xattr: glusterfs.gfidtopath getfattr -h -n glusterfs.gfidtopath /<aux-mnt>/.gfid/<gfid> If there are hardlinks, it returns all the paths separated by ':'. A volume set option is introduced to change the delimiter to required string of max length 7. gluster vol set gfid2path-separator ":::" Updates: #139 Change-Id: Ie3b0c3fd8bd5333c4a27410011e608333918c02a Signed-off-by: Kotresh HR <khiremat@redhat.com> Reviewed-on: https://review.gluster.org/17785 Smoke: Gluster Build System <jenkins@build.gluster.org> CentOS-regression: Gluster Build System <jenkins@build.gluster.org> Reviewed-by: Krutika Dhananjay <kdhananj@redhat.com>
* posix/gfid2path: Block access to gfid2path xattr via mountKotresh HR2017-07-241-2/+15
| | | | | | | | | | | | | | | | gfid2path xattr is an internal xattr and should not be allowed to modify by other applications via gluster mount. This patch blocks the same. Updates: #139 Change-Id: Id2cb29797ee1bd77e0e0d2203a47469fd7203355 Signed-off-by: Kotresh HR <khiremat@redhat.com> Reviewed-on: https://review.gluster.org/17744 Smoke: Gluster Build System <jenkins@build.gluster.org> Reviewed-by: Prashanth Pai <ppai@redhat.com> Reviewed-by: Raghavendra Bhat <raghavendra@redhat.com> Reviewed-by: Aravinda VK <avishwan@redhat.com> CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
* storage/posix: New gfid2path infraKotresh HR2017-07-101-0/+85
With this infra, a new xattr is stored on each entry creation as below. trusted.gfid2path.<xxhash> = <pargfid>/<basename> If there are hardlinks, multiple xattrs would be present. Fops which are impacted: create, mknod, link, symlink, rename, unlink Option to enable: gluster vol set <VOLNAME> storage.gfid2path on Updates: #139 Change-Id: I369974cd16703c45ee87f82e6c2ff5a987a6cc6a Signed-off-by: Kotresh HR <khiremat@redhat.com> Reviewed-on: https://review.gluster.org/17488 Smoke: Gluster Build System <jenkins@build.gluster.org> NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org> CentOS-regression: Gluster Build System <jenkins@build.gluster.org> Reviewed-by: Aravinda VK <avishwan@redhat.com> Reviewed-by: Amar Tumballi <amarts@redhat.com>