glusterfs.git, branch v3.6.0beta2

cluster/afr: Fix spurious metadata self-heals

2014-09-24T17:38:57+00:00

        Backport of http://review.gluster.org/8709

- Added logging for metadata and data self-heals which helped
  in debugging this issue.
- Added checks to skip self-heals when no sinks are available to heal

BUG: 1145987
Change-Id: Ide03af4f531a1280ec8ad95b627285df4d7bc42d
Signed-off-by: Pranith Kumar K 
Reviewed-on: http://review.gluster.org/8832
Tested-by: Gluster Build System 
Reviewed-by: Vijay Bellur

doc/snapshot : admin guide updation.

2014-09-24T10:48:45+00:00

Change-Id: I1980bc0984f941cd415fbc754495353f561155a8
BUG: 1145084
Signed-off-by: Sachin Pandit 
Reviewed-on: http://review.gluster.org/8817
Tested-by: Gluster Build System 
Reviewed-by: Vijay Bellur 
Signed-off-by: Sachin Pandit 
Reviewed-on: http://review.gluster.org/8829

cluster/afr: Fixed mem leaks in self-heal code path.

2014-09-24T10:48:20+00:00

	backport of: http://review.gluster.org/8821

AFR_STACK_RESET previously didn't cleanup afr_local_t,
leading to memory leaks. With this patch, cleanup is
done.

All credit goes to Pranith Kumar Karampuri.

Change-Id: I26506dfd9273b917eff5127c3e0cf9421e60f228
BUG: 1145914
Reviewed-on: http://review.gluster.org/8831
Reviewed-by: Pranith Kumar Karampuri 
Reviewed-by: Vijay Bellur 
Tested-by: Gluster Build System

Do not hardcode setfattr(1) path

2014-09-24T07:03:53+00:00

Turn setfattr(1) absolute path into an OS-dependant macro. Let compiler
option override it to fit custom installation if needed.

Backport of I8f469c5741a85b6e8d8f6299a9540b3d64611d2f

BUG: 1138897
Change-Id: I279752f2ec5db1abc25830cb9a23290cc401d517
Signed-off-by: Emmanuel Dreyfus 
Reviewed-on: http://review.gluster.org/8828
Tested-by: Gluster Build System 
Reviewed-by: Vijay Bellur

glusterd: Add last successful glusterd lock backtrace

2014-09-24T07:00:56+00:00

Also, moved the backtrace fetching logic to a separate function.
Modified the backtrace fetching logic able to work under memory pressure
conditions.

Change-Id: Ie38bea425a085770f41831314aeda95595177ece
BUG:1145093
Signed-off-by: Krishnan Parthasarathi 
Reviewed-on: http://review.gluster.org/8794
Tested-by: Gluster Build System 
Reviewed-by: Atin Mukherjee 
Reviewed-by: Niels de Vos 
Reviewed-by: Vijay Bellur

glusterd: Authenticate management handshake requests

2014-09-24T07:00:13+00:00

Backport of
  371bb42 glusterd: Authenticate management handshake requests
from master.

Management handshake requests, which are used to validate op-version
supported by the peers, are now only allowed if,
- the glusterd doesn't have any other peer, or
- the request was sent by another peer.

This prevents the op-version of a peer being changed because of a
connection attempt by an invalid peer.

BUG: 1144978
Change-Id: I5a909dad37e9873efe8b75dad41b7af71ce91c3d
Signed-off-by: Kaushal M 
Reviewed-on: http://review.gluster.org/8819
Reviewed-by: Atin Mukherjee 
Tested-by: Gluster Build System 
Reviewed-by: Vijay Bellur

ec: Add config information in an xattr

2014-09-24T05:46:58+00:00

To simplify backward compatibility of the ec xlator when some
parameter or the implementation itself is changed, a new xattr
is added to each file with the configuration needed to recover
it.

The new attribute is called 'trusted.ec.config', and it's a 64-bit
value containing the following information:

    8 bits: version of the config information (currently always 0)
    8 bits: algorithm used to encode the file (currently always 0)
    8 bits: size of the galois field (currently always 8)
    8 bits: number of bricks
    8 bits: redundancy
   24 bits: chunk size (currently 512)

This new xattr could allow, in a future version, to have different
configurations per file.

This is a backport of http://review.gluster.org/8770/

Change-Id: I8c12d40ff546cc201fc66caa367484be3d48aeb4
BUG: 1140862
Signed-off-by: Xavier Hernandez 
Reviewed-on: http://review.gluster.org/8825
Reviewed-by: Dan Lambright 
Tested-by: Gluster Build System 
Reviewed-by: Vijay Bellur

cluster/afr: Do not reset pending xattrs on gfid or type mismatch in entry-sh

2014-09-23T16:50:22+00:00

        Backport of: http://review.gluster.org/8816

Change-Id: I8463a579f542a2336b02edba8f5fbfea0edbbffe
BUG: 1136829
Signed-off-by: Krutika Dhananjay 
Reviewed-on: http://review.gluster.org/8823
Reviewed-by: Pranith Kumar Karampuri 
Tested-by: Gluster Build System 
Reviewed-by: Vijay Bellur

cluster/afr: Don't start heal when lookup succeeds on < 2 children

2014-09-23T16:49:10+00:00

        Backport of http://review.gluster.org/8698

Problem:
When self-heal code doesn't see at least 2 successes on looking up children,
then self-heal can't be done. What is happening now is if all the lookups fail
then the pending changelog is all zeros in xattrs so all the children are
becoming sources and leading to crashes when the code paths further assume that
some data structures are populated properly

Fix:
Don't proceed with self-heals when < 2 children succeed lookups.

BUG: 1145726
Change-Id: I65465843f0e554c8ccdd8fa930ab42ac123ec023
Signed-off-by: Pranith Kumar K 
Reviewed-on: http://review.gluster.org/8824
Reviewed-by: Krutika Dhananjay 
Tested-by: Gluster Build System 
Reviewed-by: Vijay Bellur

features/marker: Fill loc->path before sending the control to healing

2014-09-23T16:48:21+00:00

        Backport of: http://review.gluster.org/8296

Problem:
The xattr healing part of the marker requires path to be present in the loc.
Currently path is not filled while triggering from the readdirp_cbk.

Solution:
Current patch tries to fill the loc with path.

Change-Id: I2e2589ecfa6b6a6e27407c9541fa90a314649bec
BUG: 1145623
Signed-off-by: Varun Shastry 
Signed-off-by: Krutika Dhananjay 
Reviewed-on: http://review.gluster.org/8820
Tested-by: Gluster Build System 
Reviewed-by: Vijay Bellur