glusterd: validate performance.nfs.* option values during volume set stage

PROBLEM:

performance.nfs.* option values (which are of type boolean) are
not validated during the stage phase of 'volume set'.
The result - nfs graph generation fails during commit phase,
AFTER the option and its (invalid) value have been placed in
volinfo->dict.

CAUSE:

nfsperfxl_option_handler() - the function that validates the values of
performance.nfs.* options - never receives the (key,value) pair that
needs to be set, for validation during 'volume set' stage.

FIX:

In build_nfs_graph(), copy the (mod_)dict containing the (option,value)
parameters into set_dict before attempting to build the client graph
for the volume on which the operation is being performed.

Of course, an easier way out would be to simply do a 'volume reset' and
pretend nothing wrong happened!

Change-Id: I56b17d0239d58a9e0b7798933a3c8451e2675b69
BUG: 949930
Signed-off-by: Krutika Dhananjay <kdhananj@redhat.com>
Reviewed-on: http://review.gluster.org/4814
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
tests: Fix volume-status test script

* The functions now return the aggregated return value instead of just echoing it.
* Fixed the shd test loop to use the proper variable
* Added 'wait's for nfs and shd services to come online.

BUG: 764966
Change-Id: Iedbb5be0d5e50108ed4847d58625ccb093c22251
Original-author: Kaushal M <kaushal@redhat.com>
Signed-off-by: Krishnan Parthasarathi <kparthas@redhat.com>
Reviewed-on: http://review.gluster.org/4856
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
gfapi: support for chdir() and family

Add support for chdir, fchdir, getcwd, realpath equivalents in
GFAPI. These are required for the Samba VFS plugin.

Change-Id: I91d2db9146994403c98961c489c7640c51d5add2
BUG: 953694
Signed-off-by: Anand Avati <avati@redhat.com>
Reviewed-on: http://review.gluster.org/4853
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
glusterd: volume-sync needs to work with rejected peers

Change-Id: I970a51d3f62bcf414eb9552a68d1068430b93216
BUG: 950048
Signed-off-by: Krishnan Parthasarathi <kparthas@redhat.com>
Reviewed-on: http://review.gluster.org/4815
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
cluster/afr: Added documentation for eager-lock check

Change-Id: Ifa42762adde8b55ef1e2b51a59c93cebd983343f
BUG: 912581
Signed-off-by: Pranith Kumar K <pkarampu@redhat.com>
Reviewed-on: http://review.gluster.org/4792
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
gfapi: handle root (/) resolution gracefully for realpath()

Resolving path of / is crucial for realpath() to work properly.

Change-Id: I8a1b482beba37f01afbd20446d9e6f6125f2ec34
BUG: 953694
Signed-off-by: Anand Avati <avati@redhat.com>
Reviewed-on: http://review.gluster.org/4872
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
syncop: set credentials of running process in @frame

Inherit the pid/euid/egid/groups of the running process in the
frame. Do this only in cases where a loaded frame was not
presented to the synctask.

This behavior is required for Samba VFS.

Change-Id: Ib181c90f47c6741197b9ce9f67a19e2914b647d2
BUG: 953694
Signed-off-by: Anand Avati <avati@redhat.com>
Reviewed-on: http://review.gluster.org/4878
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
gfapi: implement readdirplus_r support

This call is used by Samba VFS.

Change-Id: Ib371502ad5a71b3b0e993f6b30e3dfb1f839c020
BUG: 953694
Signed-off-by: Anand Avati <avati@redhat.com>
Reviewed-on: http://review.gluster.org/4879
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
gfapi: POSIX locking support

Change-Id: I37d9e1fb4a715094876be6af3856c1b4cf398021
BUG: 953694
Signed-off-by: Anand Avati <avati@redhat.com>
Reviewed-on: http://review.gluster.org/4881
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
nfs: change default nfs port to 2049

This change makes it possible to mount glusterfs volumes
without specifying vers=3 option.

Change-Id: If5a974e2bdfd2adbeac3d82af774310cdf30f988
BUG: 832939
Signed-off-by: Rajesh Amaravathi <rajesh@redhat.com>
Reviewed-on: http://review.gluster.org/4840
Reviewed-by: Niels de Vos <ndevos@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com>
features/compress: Compression/DeCompression translator

* When a writev call occurs, the client compresses the data before
  sending it to server. On the server, compressed data is decompressed.
  Similarly, when a readv call occurs, the server compresses the data
  before sending it to client. On the client, the compressed data is
  decompressed. Thus the amount of data sent over the wire is minimized.

* Compression/Decompression is done using Zlib library.

* During normal operation, this is the format of data sent over wire :
  <compressed-data> + trailer(8)
  The trailer contains the CRC32 checksum and length of original
  uncompressed data. This is used for validation.

HOW TO USE
----------
Turning on compression xlator:
gluster volume set <vol_name> compress on

Configurable options:
gluster volume set <vol_name> compress.compression-level 8
gluster volume set <vol_name> compress.min-size 50

Change-Id: Ib7a66b6f1f70fe002b7c513588cdf75c69370805
BUG: 923540
Original-author : Venky Shankar <vshankar@redhat.com>
Signed-off-by: Venky Shankar <vshankar@redhat.com>
Signed-off-by: Prashanth Pai <nullpai@gmail.com>