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authorHumble Devassy Chirammal <hchiramm@redhat.com>2015-07-23 18:02:10 +0530
committerHumble Devassy Chirammal <humble.devassy@gmail.com>2015-08-11 05:50:55 -0700
commit0c9e2446f5beffca97d26ea1fe9816319bde525c (patch)
tree1b22c9424e3cff46382d9b65bd4477dd02a19c43 /doc/legacy/solaris-related-xattrs.txt
parent6af535cf4d10fa830bb45ba00269649a78094e40 (diff)
Removing 'legacy' directory from glusterfs doc repo
As per http://www.gluster.org/pipermail/gluster-users/2015-July/022918.html. Change-Id: Ie1473c967a53a34b6e2b4f4653e3e63ae5ea16fa BUG: 1206539 Signed-off-by: Humble Devassy Chirammal <hchiramm@redhat.com> Reviewed-on: http://review.gluster.org/11748 Reviewed-by: Prashanth Pai <ppai@redhat.com> Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com> Reviewed-by: Humble Devassy Chirammal <humble.devassy@gmail.com> Tested-by: Humble Devassy Chirammal <humble.devassy@gmail.com>
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- Solaris Extended Attributes
-
-In solaris extended attributes are logically supported as files
-within the filesystem. The file system is therefore augmented
-with an orthogonal namespace of file attributes. Attribute values
-are accessed by file descriptors obtained through a special attribute
-interface. This type of logical view of "attributes as files" allows
-the leveraging of existing file system interface functionality to
-support the construction, deletion and manipulation of attributes.
-
-But as we have tested through this functionality provided by Solaris
-we have come across two major issues as written below.
-
-1. Symlink XATTR_NOFOLLOW not present for creating extended attributes
- directly on the symlinks like other platforms Linux,MAC-OSX,BSD etc.
- An implementation is present for O_NOFOLLOW for "openat()" call sets
- up errno ELOOP whenever encountered with a symlink and also another
- implementation AT_SYMLINK_NOFOLLOW which is not present for calls like
- "attropen(), openat()"
-
- a snippet of test code which helped us understand this behaviour
- --------------------------------------
- attrfd = attropen (path, key,
- flags|AT_SYMLINK_NOFOLLOW|O_CREAT|O_WRONLY|O_NOFOLLOW, 0777);
- if (attrfd >= 0) {
- ftruncate (attrfd, 0);
- ret = write (attrfd, value, size);
- close (attrfd);
- } else {
- fprintf (stderr, "Couldn't set extended attribute for %s (%d)\n",
- path, errno);
- }
- --------------------------------------
-
-2. Extended attribute support for special files like device files, fifo files
- is not supported under solaris.
-
-Apart from these glitches almost everything regarding porting functionality
-for extended attribute calls has been properly implemented in compat.c
-with writing wrapper around functions over
-"attropen()", "openat()", "unlinkat()"
-
-
-