glusterfs.git/libglusterfs/src/graph.c, branch v3.7.12rc1

cluster/dht: Change the subvolume encoding in d_off to be a "global"

2015-03-18T11:47:41+00:00

position in the graph rather than relative (local) to a particular
translator.

Encoding the volume in this way allows a single translator to manage
which brick is currently being scanned for directory entries. Using a
single translator minimizes allocated bits in the d_off. It also allows
multiple DHT translators in the same graph to have a common frame of
reference (the graph position) for which brick is being read. Multiple
DHT translators are needed for the Tiering feature.

The fix builds off a previous change (9332) which removed subvolume
encoding from AFR. The fix makes an equivalent change to the EC
translator.

More background can be found in fix 9332 and gluster-dev discussions [1].

DHT and AFR/EC are responsibile (as before) for choosing which brick to
enumerate directory entries in over the readdir lifecycle.

The client translator receiving the readdir fop encodes the dht_t. It
is referred to as the "leaf node" in the graph and corresponds to the
brick being scanned.

When DHT decodes the d_off, it translates the leaf node to a local
subvolume, which represents the next node in the graph leading to
the brick.

Tracking of leaf nodes is done in common utility functions. Leaf nodes
counts and positional information are updated on a graph switch.

[1] www.gluster.org/pipermail/gluster-devel/2015-January/043592.html

Change-Id: Iaf0ea86d7046b1ceadbad69d88707b243077ebc8
BUG: 1190734
Signed-off-by: Dan Lambright 
Reviewed-on: http://review.gluster.org/9688
Reviewed-by: Xavier Hernandez 
Reviewed-by: Krishnan Parthasarathi 
Reviewed-by: Vijay Bellur 
Tested-by: Vijay Bellur

libglusterfs: Add functions for xlator and graph cleanup.

2015-03-03T04:34:38+00:00

Change-Id: If341e3c0a559aa5bbca9c1263a241c6592c59706
BUG: 1093594
Signed-off-by: Poornima G 
Reviewed-on: http://review.gluster.org/9696
Reviewed-by: Rajesh Joseph 
Tested-by: Gluster Build System 
Reviewed-by: Vijay Bellur

libgfapi: Wait for GF_EVENT_CHILD_DOWN in glfs_fini()

2014-12-08T09:54:45+00:00

Whenever glfs_fini() is being called, currently no
check is made inside the function to determine whether
the child is already down or not. This patch will wait
for GF_EVENT_CHILD_DOWN for the active subvol and
then exits.

TBD:
Apart from the active subvol, wait for other CHILD_DOWN
events generated through operations like volume set in
future.

Change-Id: I81c64ac07b463bfed48bf306f9e8f46ba0f0a76f
BUG: 1153610
Signed-off-by: Anoop C S 
Reviewed-on: http://review.gluster.org/9060
Reviewed-by: Shyamsundar Ranganathan 
Tested-by: Gluster Build System 
Reviewed-by: Raghavendra G 
Reviewed-by: Niels de Vos

meta: (re-)Implement Meta translator

2014-05-06T00:28:55+00:00

The meta translator exposes details about glusterfs itself
in the form of a virtual namespace.

Loading the translator on the client side creates the
meta virtual view under $mntpoint/.meta by default. The
directory is not listed (even with ls -a) and can be
accessed by doing a "cd /mnt/.meta"

Change-Id: I5ffdf39203841a9562a8280a1f79dc76d4dded5d
BUG: 1089216
Signed-off-by: Anand Avati 
Reviewed-on: http://review.gluster.org/7509
Tested-by: Gluster Build System 
Reviewed-by: Harshavardhana

common-utils: new dirent compatible time fmt

2014-04-21T01:07:44+00:00

Introduce a new time format without "/" and spaces, in order to
be used in (virtual) filenames.

Change-Id: I468be54f1ec7f45265add4c458e19d95567439f7
BUG: 1089216
Signed-off-by: Anand Avati 
Reviewed-on: http://review.gluster.org/7507
Tested-by: Gluster Build System 
Reviewed-by: Pranith Kumar Karampuri

glusterfsd, libgfapi: destroy the temporary graphs constructed for comparison

2013-10-04T04:32:43+00:00

* The new and the oldgraphs which have been constructed whenever there is
  a volfile change (either reconfigure of the existing graph or creating
  a new graph) for comparison should be freed. Otherwise frequent graph
  changes will lead to huge memory leak

Change-Id: I4faddb1aa9393b34cd2de6732e537a60f600026a
BUG: 948178
Signed-off-by: Raghavendra Bhat 
Reviewed-on: http://review.gluster.org/5388
Tested-by: Gluster Build System 
Reviewed-by: Anand Avati

core: changes to support gfid-access

2013-08-21T19:13:16+00:00

Change-Id: I38d2fdc47e4b805deafca6805e54807976ffdb7e
Signed-off-by: Amar Tumballi 
BUG: 952029
Reviewed-on: http://review.gluster.org/5496
Tested-by: Gluster Build System 
Reviewed-by: Anand Avati

debug/trace: save the recent fops received in the event-history

2013-01-18T05:15:13+00:00

* Make use of event-history in debug/trace xlator to dump the recent fops,
when statedump is given. trace xlator saves the fop it received along
with the time in the event-history and upon statedump signal, dumps its
history. The size of the event-history can be given as a xlator option.

* Make changes in trace to take logging into log-file or logging to
history as an option. By default both are off.

Change-Id: I12baee5805c6efb55735cead4e2093fb94d7a6a0
BUG: 797171
Signed-off-by: Raghavendra Bhat 
Reviewed-on: http://review.gluster.org/4088
Tested-by: Gluster Build System 
Reviewed-by: Anand Avati

libglusterfs/graph: pass correct translator pairs during reconfigure

2012-09-21T20:21:50+00:00

when we autoload xlators like acl, worm or mac-compatibility,
they will be loaded on top of old graph.
However, corresponding ones won't be present in new graph, since
newgraph doesn't contain autoloaded translators. While
passing xlator pairs to reconfigure, this fact should be accounted
and correct xlator pairs should be passed instead of blindly passing
oldgraph->first and newgraph->first.

Signed-off-by: Raghavendra G 
Change-Id: I8f4fe37b7e26dc2dcae78c1fe0d4a04f8ab84ed0
BUG: 857874
Reviewed-on: http://review.gluster.org/3949
Tested-by: Gluster Build System 
Reviewed-by: Anand Avati

libglusterfs/dict: make 'dict_t' a opaque object

2012-09-06T07:34:15+00:00

* ie, don't dereference dict_t pointer, instead use APIs everywhere
* other than dict_t only 'data_t' should be the valid export from dict.h

* added 'dict_foreach_fnmatch()' API
* changed dict_lookup() to use data_t, instead of data_pair_t

Change-Id: I400bb0dd55519a7c5d2a107e67c8e7a7207228dc
Signed-off-by: Amar Tumballi 
BUG: 850917
Reviewed-on: http://review.gluster.org/3829
Tested-by: Gluster Build System 
Reviewed-by: Anand Avati