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* features/changelog: Remove incorrect error messageKotresh HR2015-12-141-4/+0
| | | | | | | | | | | | | | | | | | During changelog_rollover, the rename error is logged even though changelog rollover is successful. This got mistakenly added as part of commit 64e6836ac8fb96f38a859eea0d8525cd9bd2693f (http://review.gluster.org/10532). Removing the same. Change-Id: I7ac1a16b41de5a6a4d7e714946585dff3ce0e83b BUG: 1290421 Signed-off-by: Kotresh HR <khiremat@redhat.com> Reviewed-on: http://review.gluster.org/12940 Reviewed-by: Aravinda VK <avishwan@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Venky Shankar <vshankar@redhat.com> Tested-by: NetBSD Build System <jenkins@build.gluster.org>
* features/changelog: Capture FXATTROP and XATTROP in changelogKotresh HR2015-11-221-0/+129
| | | | | | | | | | | | | | | GEO-REP INTEROP WITH SHARD FEATURE shard xlator updates size of the file using FXATTROP or XATTROP. Hence record the same in changelog. Change-Id: Ie0c21e9326da05ea78dc1ef3fd32a90ef38b4bb9 BUG: 1265148 Signed-off-by: Kotresh HR <khiremat@redhat.com> Reviewed-on: http://review.gluster.org/12225 Tested-by: NetBSD Build System <jenkins@build.gluster.org> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Venky Shankar <vshankar@redhat.com>
* cluster/ec: Mark self-heal fops as internalPranith Kumar K2015-11-181-1/+1
| | | | | | | | | | Change-Id: I8ae7af266d3e00460f0cfdc9389a926e5f2fee36 BUG: 1282761 Signed-off-by: Pranith Kumar K <pkarampu@redhat.com> Reviewed-on: http://review.gluster.org/12598 Tested-by: Gluster Build System <jenkins@build.gluster.com> Tested-by: NetBSD Build System <jenkins@build.gluster.org> Reviewed-by: Xavier Hernandez <xhernandez@datalab.es>
* core: use syscall wrappers instead of direct syscallsKaleb S. KEITHLEY2015-10-289-52/+63
| | | | | | | | | | | | | | | various xlators and other components are invoking system calls directly instead of using the libglusterfs/syscall.[ch] wrappers. If not using the system call wrappers there should be a comment in the source explaining why the wrapper isn't used. Change-Id: I8ef94c48728666465abf126c778b70c9e5c00e47 BUG: 1267967 Signed-off-by: Kaleb S. KEITHLEY <kkeithle@redhat.com> Reviewed-on: http://review.gluster.org/12273 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Jeff Darcy <jdarcy@redhat.com>
* features/changelog: record mknod if tier-dht linkto is setSaravanakumar Arumugam2015-10-271-2/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a series of patches which aims to fix geo-replication in a Tiering Volume. Problem: Consider, a file is placed in volume initially and then hot tier is attached. During any operation on the file, due to lookup a linkto file is created in hot tier. Now, any namespace operation carried out on the file is recorded in both cold and hot tier. There is a room for races when both changelogs are replayed. Solution: So, We are going to replay (namespace related)operations only in the hot tier. Why? a. If the file is directly placed in Hot tier, all fops will be recorded in HOT tier. b. If the file is already present in Cold tier, and if any fop is carried out, it creates linkto file in Hot tier. Now, operations like UNLINK, RENAME are captured in Hot tier(by means of linkto file). This way, we can get both tier's operation in HOT tier itself. But, We may miss initial Data sync immediately after creating the file as it is only recording MKNOD. So, if MKNOD encountered with sticky bit set, queue DATA operation for the corresponding gfid. ( This geo-rep related changes are addressed in this patch: http://review.gluster.org/12326/ ) So, If tier-dht linkto is set, we need to record the corresponding MKNOD. Earlier this was avoided as it was set as INTERNAL fop. (This is addressed here in this patch) Change-Id: I25514fe3e25f68592a8d6361507f8c8a4fcb70b1 BUG: 1266875 Signed-off-by: Saravanakumar Arumugam <sarumuga@redhat.com> Reviewed-on: http://review.gluster.org/12417 Reviewed-by: Aravinda VK <avishwan@redhat.com> Reviewed-by: Kotresh HR <khiremat@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Venky Shankar <vshankar@redhat.com>
* features/changelog: ignore recording tiering rebalance fopsSaravanakumar Arumugam2015-10-271-6/+7
| | | | | | | | | | | | | Recording of tiering rebalance process's fops like Creation and Deletion of file must be avoided. Ignore the fops using corresponding pid. Change-Id: Ifdc7765598d04d033f93e6339e9b188f7566cb65 BUG: 1266875 Signed-off-by: Saravanakumar Arumugam <sarumuga@redhat.com> Reviewed-on: http://review.gluster.org/12239 Reviewed-by: Aravinda VK <avishwan@redhat.com> Reviewed-by: Venky Shankar <vshankar@redhat.com>
* build: export minimum symbols from xlators for correct resolutionKaleb S. KEITHLEY2015-09-241-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | We've been lucky that we haven't had any symbol collisions until now. Now we have a collision between the snapview-client's svc_lookup() and libntirpc's svc_lookup() with nfs-ganesha's FSAL_GLUSTER and libgfapi. As a short term solution all the snapview-client's FOP methods were changed to static scope. See http://review.gluster.org/11805. This works in snapview-client because all the FOP methods are defined in a single source file. This solution doesn't work for other xlators with FOP methods defined in multiple source files. To address this we link with libtool's '-export-symbols $symbol-file' (a wrapper around `ld --version-script ...` --- on linux anyway) and only export the minimum required symbols from the xlator sharedlib. N.B. the libtool man page says that the symbol file should be named foo.sym, thus the rename of *.exports to *.sym. While foo.exports worked, we will follow the documentation. Signed-off-by: Kaleb S. KEITHLEY <kkeithle@redhat.com> BUG: 1248669 Change-Id: I1de68b3e3be58ae690d8bfb2168bfc019983627c Reviewed-on: http://review.gluster.org/11814 Tested-by: NetBSD Build System <jenkins@build.gluster.org> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: soumya k <skoduri@redhat.com> Reviewed-by: Niels de Vos <ndevos@redhat.com>
* all: reduce "inline" usageJeff Darcy2015-09-016-71/+20
| | | | | | | | | | | | | | | | | | | | | | | | | There are three kinds of inline functions: plain inline, extern inline, and static inline. All three have been removed from .c files, except those in "contrib" which aren't our problem. Inlines in .h files, which are overwhelmingly "static inline" already, have generally been left alone. Over time we should be able to "lower" these into .c files, but that has to be done in a case-by-case fashion requiring more manual effort. This part was easy to do automatically without (as far as I can tell) any ill effect. In the process, several pieces of dead code were flagged by the compiler, and were removed. Change-Id: I56a5e614735c9e0a6ee420dab949eac22e25c155 BUG: 1245331 Signed-off-by: Jeff Darcy <jdarcy@redhat.com> Reviewed-on: http://review.gluster.org/11769 Tested-by: NetBSD Build System <jenkins@build.gluster.org> Reviewed-by: Dan Lambright <dlambrig@redhat.com> Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com> Reviewed-by: Niels de Vos <ndevos@redhat.com> Reviewed-by: Raghavendra Bhat <raghavendra@redhat.com> Reviewed-by: Venky Shankar <vshankar@redhat.com>
* rpc: add owner xlator argument to rpc_clnt_newKrishnan Parthasarathi2015-08-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The @owner argument tells RPC layer the xlator that owns the connection and to which xlator THIS needs be set during network notifications like CONNECT and DISCONNECT. Code paths that originate from the head of a (volume) graph and use STACK_WIND ensure that the RPC local endpoint has the right xlator saved in the frame of the call (callback pair). This guarantees that the callback is executed in the right xlator context. The client handshake process which includes fetching of brick ports from glusterd, setting lk-version on the brick for the session, don't have the correct xlator set in their frames. The problem lies with RPC notifications. It doesn't have the provision to set THIS with the xlator that is registered with the corresponding RPC programs. e.g, RPC_CLNT_CONNECT event received by protocol/client doesn't have THIS set to its xlator. This implies, call(-callbacks) originating from this thread don't have the right xlator set too. The fix would be to save the xlator registered with the RPC connection during rpc_clnt_new. e.g, protocol/client's xlator would be saved with the RPC connection that it 'owns'. RPC notifications such as CONNECT, DISCONNECT, etc inherit THIS from the RPC connection's xlator. Change-Id: I9dea2c35378c511d800ef58f7fa2ea5552f2c409 BUG: 1235582 Signed-off-by: Krishnan Parthasarathi <kparthas@redhat.com> Reviewed-on: http://review.gluster.org/11436 Tested-by: Gluster Build System <jenkins@build.gluster.com> Tested-by: NetBSD Build System <jenkins@build.gluster.org> Reviewed-by: Raghavendra G <rgowdapp@redhat.com>
* features/changelog: Porting log messages to new logging frameworkAnusha Rao2015-08-1117-376/+1324
| | | | | | | | | | | Change-Id: Ic7f842acca52908fd88e0796dc90b82650405b25 BUG: 1194640 Signed-off-by: Anusha Rao <anusha91rao@gmail.com> Reviewed-on: http://review.gluster.org/10532 Tested-by: NetBSD Build System <jenkins@build.gluster.org> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Venky Shankar <vshankar@redhat.com> Reviewed-by: Kotresh HR <khiremat@redhat.com>
* features/changelog: fix buffer overrun in changelog-helpersPrasanna Kumar Kalever2015-07-141-5/+3
| | | | | | | | | | | | | | | | | changelog-helpers.c:1911:17: warning: Size argument is greater than the free space in the destination buffer strncat (result, pre_dir_name, PATH_MAX); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ changelog-helpers.c:1919:17: warning: Size argument is greater than the free space in the destination buffer strncat (result, bname, PATH_MAX); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Change-Id: I60ca7fe762f07cb72fe7b69f0253835becaff7b9 BUG: 1222238 Signed-off-by: Prasanna Kumar Kalever <prasanna.kalever@redhat.com> Reviewed-on: http://review.gluster.org/10802 Tested-by: NetBSD Build System <jenkins@build.gluster.org> Reviewed-by: Venky Shankar <vshankar@redhat.com>
* build: Mac OS X build issues, no spinlock, need sys_lgetxattrKaleb S. KEITHLEY2015-07-051-1/+1
| | | | | | | | | | | | use regular locks, use our syscall wrappers in libglusterfs Change-Id: I7e0d00956366806af041b69b65d1f169aa0d2ae2 BUG: 1238793 Signed-off-by: Kaleb S. KEITHLEY <kkeithle@redhat.com> Reviewed-on: http://review.gluster.org/11515 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Niels de Vos <ndevos@redhat.com> Tested-by: NetBSD Build System <jenkins@build.gluster.org>
* libgfchangelog: Fix example programsKotresh HR2015-07-024-2/+21
| | | | | | | | | | | | | | Incorporate the new API 'gf_changelog_init' introduced in libgfchangelog which should be called before 'gf_changelog_register'. Change-Id: I10a9dd5ff3ecc64fd61dcb6b1aa53739e0bdeedd BUG: 1238063 Signed-off-by: Kotresh HR <khiremat@redhat.com> Reviewed-on: http://review.gluster.org/11479 Tested-by: NetBSD Build System <jenkins@build.gluster.org> Reviewed-by: Venky Shankar <vshankar@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com>
* features/changelog: Always log directory rename operationsVijay Bellur2015-06-261-1/+3
| | | | | | | | | | | | | Directory renames are being ignored as special renames. Special renames can happen only on files. Hence always log directory rename operations in changelog. Change-Id: I4fbdb3e02e634a39a8846fb2f7a4c6cc2ba74400 BUG: 1234286 Signed-off-by: Vijay Bellur <vbellur@redhat.com> Reviewed-on: http://review.gluster.org/11356 Tested-by: NetBSD Build System <jenkins@build.gluster.org> Reviewed-by: Venky Shankar <vshankar@redhat.com>
* features/bitrot: cleanup, v2Venky Shankar2015-06-251-26/+4
| | | | | | | | | | | | | | | This patch uses "cleanup, v1" infrastrcuture to cleanup scrubber (data structures, threads, timers, etc..) on brick disconnection. Signer is not cleaned up yet: probably would be done as part of another patch. Change-Id: I78a92b8a7f02b2f39078aa9a5a6b101fc499fd70 BUG: 1231619 Signed-off-by: Venky Shankar <vshankar@redhat.com> Reviewed-on: http://review.gluster.org/11148 Tested-by: NetBSD Build System <jenkins@build.gluster.org> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Raghavendra Bhat <raghavendra@redhat.com>
* libgfchangelog: Fix crash in gf_changelog_processKotresh HR2015-06-172-8/+14
| | | | | | | | | | | | | | | | | | | | | | | Problem: Crash observed in gf_changelog_process and gf_changelog_callback_invoker. Cause: Assignments to arguments passed to thread is done post thread creation. If the thread created gets scheduled before the assignment and access these variables, it would crash with segmentation fault. Solution: Assignments to arguments are done prior to the thread creation. Change-Id: I6afc8ccedd050cf4b50b967fef8287a0c834177b BUG: 1232666 Signed-off-by: Kotresh HR <khiremat@redhat.com> Reviewed-on: http://review.gluster.org/11273 Tested-by: NetBSD Build System <jenkins@build.gluster.org> Reviewed-by: Venky Shankar <vshankar@redhat.com>
* features/changelog: Do htime setxattr without XATTR_REPLACE flagKotresh HR2015-06-122-10/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | HTIME_KEY marks the last changelog rolled over. The xattr is maintained on .glusterfs/changelog/htime/HTIME.TSTAMP file. On every rollover of the changelog file, the xattr is updated. It is being updated with XATTR_REPLACE flag as xattr gets created during changelog enable. But it is once found that the xattrs on the file is cleared and is not reproduced later on. This patch protects that case, if it happens by setting xattr without XATTR_REPLACE flag in failure case. The reason behind doing this in failure case is not to mask the actual cause of xattrs getting cleared. This provides the log message if the original issue still exists but the consequential effects are fixed. Also changed the log messages to depict the events happened during changelog enable. Change-Id: I699ed09a03667fd823d01d65c9c360fa7bc0e455 BUG: 1230015 Signed-off-by: Kotresh HR <khiremat@redhat.com> Reviewed-on: http://review.gluster.org/11150 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Venky Shankar <vshankar@redhat.com>
* features/changelog: Avoid setattr fop logging during renameSaravanakumar Arumugam2015-06-111-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Problem: When a file is renamed and the (renamed)file's Hashing falls into a different brick, DHT creates a special file(linkto file) in the brick(Hashed subvolume) and carries out setattr operation on that file. Currently, Changelog records this(setattr) operation in Hashed subvolume. glusterfind in turn records this operation as MODIFY operation. So, there is a NEW entry in Cached subvolume and MODIFY entry in Hashed subvolume for the same file. Solution: Avoid logging setattr operation carried out, by marking the operation as internal fop using xdata. In changelog translator, check whether setattr is set as internal fop and skip accordingly. Change-Id: I21b09afb5a638b88a4ccb822442216680b7b74fd BUG: 1230007 Signed-off-by: Saravanakumar Arumugam <sarumuga@redhat.com> Reviewed-on: http://review.gluster.org/11137 Reviewed-by: Raghavendra G <rgowdapp@redhat.com> Tested-by: Raghavendra G <rgowdapp@redhat.com>
* features/changelog: Remove inline keyword to avoid warnings (gcc v5.1.1)Anoop C S2015-06-015-16/+16
| | | | | | | | | | | | | | | | | | | | | | | When compiled with gcc5, following warnings were displayed and volume start failed: changelog-helpers.h:499:1: warning: inline function 'changelog_dispatch_event' declared but never defined changelog_dispatch_event (xlator_t *, changelog_priv_t *, changelog_event_t *); gf-changelog-journal-handler.c:692:17: warning: 'list_add_tail' is static but used in inline function 'gf_changelog_queue_journal' which is not static list_add_tail (&entry->list, &jnl_proc->entries); Fix is to remove the keyword from function prototype and definitions. Change-Id: I188b35b7ca087a94d7a48a052b05a6d845e3b74b BUG: 1226307 Signed-off-by: Anoop C S <achiraya@redhat.com> Reviewed-on: http://review.gluster.org/11004 Tested-by: NetBSD Build System <jenkins@build.gluster.org> Reviewed-by: Venky Shankar <vshankar@redhat.com>
* featuress/changelog: On snapshot, notify irrespective of failuresKotresh HR2015-05-313-23/+33
| | | | | | | | | | | | | | | | | | | | During snapshot, changelog barrier is enabled and a explicit rollover of changelog is initiated. During rollover of changelog, if any error or changelog is empty, the notification was not sent to reconfigure and hence snapshot was failing because of timeout. This patch addresses it by sending notification irrespective of failures and sends error if any back to barrier. Change-Id: I898af624b44555281a9e43c69066077e0e121c17 BUG: 1225542 Signed-off-by: Kotresh HR <khiremat@redhat.com> Reviewed-on: http://review.gluster.org/10951 Tested-by: NetBSD Build System <jenkins@build.gluster.org> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Aravinda VK <avishwan@redhat.com> Reviewed-by: Venky Shankar <vshankar@redhat.com>
* build: do not #include "config.h" in each fileNiels de Vos2015-05-294-20/+0
| | | | | | | | | | | | | | | | | | Instead of including config.h in each file, and have the additional config.h included from the compiler commandline (-include option). When a .c file tests for a certain #define, and config.h was not included, incorrect assumtions were made. With this change, it can not happen again. BUG: 1222319 Change-Id: I4f9097b8740b81ecfe8b218d52ca50361f74cb64 Signed-off-by: Niels de Vos <ndevos@redhat.com> Reviewed-on: http://review.gluster.org/10808 Tested-by: Gluster Build System <jenkins@build.gluster.com> Tested-by: NetBSD Build System Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com> Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
* geo-rep: rename handling in dht volume(changelog changes)Saravanakumar Arumugam2015-05-081-38/+77
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Background: Glusterfs changelogs are stored in each brick, which records the changes happened in that brick. Georep will run in all the nodes of master and processes changelogs "independently". Processing changelogs is in brick level, but all the fops will be replayed on "slave mount" point. Problem: With a DHT volume, in changelog "internal fops" are NOT recorded. For Rename case, Rename is recorded in "hashed" brick changelog. (DHT's internal fops like creating linkto file, unlink is NOT recorded). This lead us to inconsistent rename operations. For example, Distribute volume created with Two bricks B1, B2. //Consider master volume mounted @ /mnt/master and following operations executed: cd /mnt/master touch f1 // f1 falls on B1 Hash mv f1 f2 // f2 falls on B2 Hash // Here, Changelogs are recorded as below: @B1 CREATE f1 @B2 RENAME f1 f2 Here, race exists between Brick B1 and B2, say B2 will get executed first. Source file f1 itself is "NOT PRESENT", so it will go ahead and create f2 (Current implementation). We have this problem When rename falls in another brick and file is unlinked in Master. Similar kind of issue exists in following case too(multiple rename): CREATE f1 RENAME f1 f2 RENAME f2 f1 Solution: Instead of carrying out "changelogging" at "HASHED volume", carry out at the "CACHED volume". This way we have rename operations carried out where actual files are present. So,Changelog recorded as : @B1 CREATE f1 RENAME f1 f2 Note: This patch is dependent on dht changes from this patch. http://review.gluster.org/10410/ changelog related changes are separated out for review. In changelog, xdata passed from DHT is considered as : 1. In case of unlink (internal operation as part of rename), xdata value is set , it is considered as RENAME and recorded accordingly. 2. In case of rename (Hash and Cache different), xdata value is NOT set, recording rename operation is SKIPPED. BUG: 1141379 Change-Id: Ifca675e6d4ef8c4e3b7ef4a7ec85de8b3a38dc08 Signed-off-by: Saravanakumar Arumugam <sarumuga@redhat.com> Reviewed-on: http://review.gluster.org/10220 Tested-by: Gluster Build System <jenkins@build.gluster.com> Tested-by: NetBSD Build System Reviewed-by: Kotresh HR <khiremat@redhat.com>
* features/changelog: Fix buffer overflow in snprintfKotresh HR2015-05-081-8/+8
| | | | | | | | | | Change-Id: Ie7e7c6028c7bffe47e60a2e93827e0e8767a3d66 BUG: 1219894 Signed-off-by: Kotresh HR <khiremat@redhat.com> Reviewed-on: http://review.gluster.org/10687 Reviewed-by: Aravinda VK <avishwan@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com> Tested-by: NetBSD Build System
* features/changelog: Fixing compilation issueAravinda VK2015-05-082-2/+5
| | | | | | | | | | | | This issue introduced due to manual rebase. Change-Id: I0589f4a0a1270190340f419b8022d6483bcf853d Signed-off-by: Aravinda VK <avishwan@redhat.com> BUG: 1219479 Reviewed-on: http://review.gluster.org/10685 Reviewed-by: Niels de Vos <ndevos@redhat.com> Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com> Tested-by: Niels de Vos <ndevos@redhat.com>
* features/changelog: Avoid creation of empty changelogsSaravanakumar Arumugam2015-05-083-23/+154
| | | | | | | | | | | | | | | | | | An empty changelog when rolled over gets unlinked and indexed with a modified path-name in htime file. The modification is "changelog" not "CHANGELOG" in basename of the empty changelog file. Change-Id: I77fd0b48b5c33c245418f5ac7a9756f08ece24d9 BUG: 1208470 Signed-off-by: Ajeet Jha <ajha@redhat.com> Signed-off-by: Saravanakumar Arumugam <sarumuga@redhat.com> Reviewed-on: http://review.gluster.org/9572 Tested-by: NetBSD Build System Reviewed-by: Aravinda VK <avishwan@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Kotresh HR <khiremat@redhat.com> Reviewed-by: Venky Shankar <vshankar@redhat.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* features/changelog: Version support for Changelog ParserAravinda VK2015-05-062-11/+70
| | | | | | | | | | | | | | | | | | As optional feature, during unlink, full path will be recorded. Changelog Version number to be bumped up to 1.2. With this patch, parser checks the version number before parsing and handles accordingly. Change-Id: Ic1ad98259c39e417029a08e26a1d4b467817e65a BUG: 1214561 Signed-off-by: Aravinda VK <avishwan@redhat.com> Signed-off-by: Kotresh HR <khiremat@redhat.com> Reviewed-on: http://review.gluster.org/10166 Reviewed-by: Saravanakumar Arumugam <sarumuga@redhat.com> Tested-by: NetBSD Build System Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Venky Shankar <vshankar@redhat.com>
* feature/changelog: Capture path for deletesKotresh HR2015-05-046-5/+188
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | PROBLEM: There is no way to get the path of deleted file if we have gfid from changelog since the file is already deleted. SOLUTION: Do a recursive readlink on parent gfid in backend .glusterfs path to get the complete path in I/O callpath in changelog translator and capture it in callback. The path captured is relative from the brick root. The field separator used is '\0'. e.g., ......\0<pgfid>/bname\0<relative-path>\0<next-record> ADDITIONAL REQUIRED CHANGES: 1. The changelog translator option called "changelog.capture-del-path" is introduced to enable or disable the capturing of deleted entry path. e.g., gluster vol set <vol-name> changelog.capture-del-path on/off If capture-del-path is disabled, '\0' is captured instead of relative path. e.g., ......\0<pgfid>/bname\0\0\0<next-record> 2. The minor number in the version of changelog is bumped up from v1.1 to v1.2. 3. If recursive readlink is failed for some reason, it will capture \0 in place of <relative path>. e.g., ......\0<pgfid>/bname\0\0\0<next-record> (same as when caputre-del-path option is disabled) 4. If bname argument passed to "resolve_pargfid_to_path" function is NULL and pargfid is ROOT, "." is returned. This is not the case with changelog, where bname is always passed. This is applicable to other consumers of "resolve_pargfid_to_path" routine. NOTE: Changelog parser should consider the above new changes and should parse accordingly. Change-Id: I040ed429b5aa7d391033fc6a540edbf07fc37827 BUG: 1214561 Signed-off-by: Kotresh HR <khiremat@redhat.com> Reviewed-on: http://review.gluster.org/10288 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Venky Shankar <vshankar@redhat.com> Tested-by: NetBSD Build System
* rpc: Maintain separate xlator pointer in 'rpcsvc_state'Kotresh HR2015-05-042-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The structure 'rpcsvc_state', which maintains rpc server state had no separate pointer to track the translator. It was using the mydata pointer itself. So callers were forced to send xlator pointer as mydata which is opaque (void pointer) by function prototype. 'rpcsvc_register_init' is setting svc->mydata with xlator pointer. 'rpcsvc_register_notify' is overwriting svc->mydata with mydata pointer. And rpc interprets svc->mydata as xlator pointer internally. If someone passes non xlator structure pointer to rpcsvc_register_notify as libgfchangelog currently does, it might corrupt mydata. So interpreting opaque mydata as xlator pointer is incorrect as it is caller's choice to send mydata as any type of data to 'rpcsvc_register_notify'. Maintaining two different pointers in 'rpcsvc_state' for xlator and mydata solves the issue. Change-Id: I7874933fefc68f3fe01d44f92016a8e4e9768378 BUG: 1215161 Signed-off-by: Kotresh HR <khiremat@redhat.com> Reviewed-on: http://review.gluster.org/10366 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Raghavendra G <rgowdapp@redhat.com> Tested-by: Raghavendra G <rgowdapp@redhat.com>
* features/changelog: Consider only changelog on/off as changelog breakageKotresh HR2015-05-024-11/+211
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Earlier, both chagelog on/off and brick restart were considered to be changelog breakage and treated as changelog not being continuous. As a result, new HTIME.TSTAMP file was created on both the above cases. Now the change is made such that only on changelog enable/disable, the changelog is considered to be discontinuous. New HTIME.TSTAMP file is not created on brick restart, the changelogs files are appended to last HTIME.TSTAMP file. Treating changelog as continuous in above scenario is important as changelog history API will fail otherwise. It can successfully get changes between start and end timestamps only when changelog is continuous (Changelogs in single HTIME.TSTAMP file are treated as continuous). Without this change, changelog history API would fail, and it would become necessary to fallback to other mechanisms like xsync FSCrawl in case geo-rep to detect changes in this time window. But Xsync FSCrawl would not be applicable to other consumers like glusterfind. Rationale: 1. In plain distributed volume, if brick goes down, no I/O can happen onto the brick. Hence changelog is intact with data on disk. 2. In distributed replicate volume, if brick goes down, since self-heal traffic is captured in changelog. Eventually, I/O happened whend brick down is captured in changelog. Change-Id: I2eb66efe6ee9a9228fb1fcb38d6e7696b9559d5b BUG: 1211327 Signed-off-by: Kotresh HR <khiremat@redhat.com> Reviewed-on: http://review.gluster.org/10222 Reviewed-by: Venky Shankar <vshankar@redhat.com> Tested-by: Venky Shankar <vshankar@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com> Tested-by: NetBSD Build System
* changelog: Fixing buffer overrun coverity issues.Nandaja Varma2015-04-302-7/+7
| | | | | | | | | | | | | | | | Coverity IDs: 1214630 1214631 1214633 1234643 Change-Id: I172c4f49bf651b2324522f9e661023f73ca05339 BUG: 789278 Signed-off-by: Nandaja Varma <nvarma@redhat.com> Reviewed-on: http://review.gluster.org/9557 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Sakshi Bansal Reviewed-by: Venky Shankar <vshankar@redhat.com>
* features/bit-rot: Mark versioning fsetxattr as internal fopKotresh HR2015-04-111-0/+1
| | | | | | | | | | | | | | | | | Changelog xlator was capturing bitrot-stub's fsetxattr sent for versioning. Since it was using the same frame as of the create fop, there was inconsistency in fop number and gfid of capturing metadata. So fix is to mark fsetxattr used for versioning as internal and add internal fop filter in changelog_fsetxattr. Change-Id: I51ff468995139838b22bf293a59a0713a92ee7a5 BUG: 1170075 Signed-off-by: Kotresh HR <khiremat@redhat.com> Reviewed-on: http://review.gluster.org/10148 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Venky Shankar <vshankar@redhat.com> Tested-by: Venky Shankar <vshankar@redhat.com>
* build: make contrib/uuid dependency optionalNiels de Vos2015-04-103-12/+4
| | | | | | | | | | | | | | | | | | | On Linux systems we should use the libuuid from the distribution and not bundle and statically link the contrib/uuid/ bits. libglusterfs/src/compat-uuid.h has been introduced and should become an abstraction layer for different UUID APIs. Non-Linux operating systems should implement their compatibility layer there. Once all operating systems have an implementation in compat-uuid.h, we can remove contrib/uuid/ from the repository completely. Change-Id: I345e5357644be2521685e00358bb8c83c4ea0577 BUG: 1206587 Signed-off-by: Niels de Vos <ndevos@redhat.com> Reviewed-on: http://review.gluster.org/10129 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* features/changelog: fix possible illegal memory access (CID 1288819)Michael Adam2015-04-081-1/+2
| | | | | | | | | | | | | | | | Coverity CID 1288819 strncpy executed with a limit equal to the target array size potentially leaves the target string not null terminated. Make sure the copied string is a valid 0 terminated string. Change-Id: Ie2d2970f37840146aa18724be3b89e93194c8160 BUG: 789278 Signed-off-by: Michael Adam <obnox@samba.org> Reviewed-on: http://review.gluster.org/10062 Reviewed-by: Niels de Vos <ndevos@redhat.com> Reviewed-by: Venky Shankar <vshankar@redhat.com> Tested-by: Venky Shankar <vshankar@redhat.com>
* features/changelog: fix possible illegal memory access (CID 1288821)Michael Adam2015-04-051-1/+2
| | | | | | | | | | | | | | | | | Coverity CID 1288821 strncpy executed with a limit equal to the target array size potentially leaves the target string not null terminated. Make sure the copied string is a valid 0 terminated string. Change-Id: I5ecc60549864cf50e3facbb8a2d9228cd67b57b5 BUG: 789278 Signed-off-by: Michael Adam <obnox@samba.org> Reviewed-on: http://review.gluster.org/10061 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Niels de Vos <ndevos@redhat.com> Reviewed-by: Venky Shankar <vshankar@redhat.com> Tested-by: Venky Shankar <vshankar@redhat.com>
* Avoid conflict between contrib/uuid and system uuidEmmanuel Dreyfus2015-04-043-9/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | glusterfs relies on Linux uuid implementation, which API is incompatible with most other systems's uuid. As a result, libglusterfs has to embed contrib/uuid, which is the Linux implementation, on non Linux systems. This implementation is incompatible with systtem's built in, but the symbols have the same names. Usually this is not a problem because when we link with -lglusterfs, libc's symbols are trumped. However there is a problem when a program not linked with -lglusterfs will dlopen() glusterfs component. In such a case, libc's uuid implementation is already loaded in the calling program, and it will be used instead of libglusterfs's implementation, causing crashes. A possible workaround is to use pre-load libglusterfs in the calling program (using LD_PRELOAD on NetBSD for instance), but such a mechanism is not portable, nor is it flexible. A much better approach is to rename libglusterfs's uuid_* functions to gf_uuid_* to avoid any possible conflict. This is what this change attempts. BUG: 1206587 Change-Id: I9ccd3e13afed1c7fc18508e92c7beb0f5d49f31a Signed-off-by: Emmanuel Dreyfus <manu@netbsd.org> Reviewed-on: http://review.gluster.org/10017 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Niels de Vos <ndevos@redhat.com>
* libgfchangelog: Use correct 'this' pointer on new thread creationKotresh HR2015-04-034-4/+12
| | | | | | | | | | | | | | | | When libgfchangelog is linked with non xlator application, it should point to 'master' xlator which is initiated separately. When ever a new thread is created, 'THIS' points to the global xlator. 'THIS' should point to corresponding xlator even then. This patch adjusts the pointer accordingly. Change-Id: I2a199bb3c73146a0329540aedcbae697a00f6f0a BUG: 1207643 Signed-off-by: Kotresh HR <khiremat@redhat.com> Reviewed-on: http://review.gluster.org/10074 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Venky Shankar <vshankar@redhat.com> Tested-by: Venky Shankar <vshankar@redhat.com>
* features/changelog: fix possible illegal mem access (CID 1288822)Michael Adam2015-04-021-4/+2
| | | | | | | | | | | | | | | | | | | | | | | | Coverity CID 1288822 (#1 of 2) strncpy executed with a limit equal to the target array size potentially leaves the target string not null terminated. In this case the strncpy is not needed due to the snprintf with the same target buffer which follows immediately. This patch also removes the now unneeded scratch_dir argument to gf_changelog_init_history(), which is semantically correct, since scratch_dir has previously been filled into jnl->jnl_working_dir by the caller, and this is now used to fill hist_scratch_dir. Change-Id: Ib1ed3a1058e80e34191758921b49c29030d6c9db BUG: 789278 Signed-off-by: Michael Adam <obnox@samba.org> Reviewed-on: http://review.gluster.org/10058 Reviewed-by: Kotresh HR <khiremat@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* Xlators : Fixed typosManikandan Selvaganesh2015-04-022-2/+5
| | | | | | | | | | | Change-Id: I948f85cb369206ee8ce8b8cd5e48cae9adb971c9 BUG: 1075417 Signed-off-by: Manikandan Selvaganesh <mselvaga@redhat.com> Reviewed-on: http://review.gluster.org/9529 Reviewed-by: Niels de Vos <ndevos@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com> Reviewed-by: Humble Devassy Chirammal <humble.devassy@gmail.com>
* features/changelog: fix possible memory illegal access (2 of 2, coverity)Michael Adam2015-04-011-1/+2
| | | | | | | | | | | | | | | | | | Coverity CID 1288822 (#2 of 2) strncpy executed with a limit equal to the target array size potentially leaves the target string not null terminated. Make sure the copied string is a valid 0 terminated string. Change-Id: If283dd6f716912f65729edf6ea26a4331a697151 BUG: 789278 Signed-off-by: Michael Adam <obnox@samba.org> Reviewed-on: http://review.gluster.org/10059 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Poornima G <pgurusid@redhat.com> Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com> Reviewed-by: Venky Shankar <vshankar@redhat.com> Tested-by: Venky Shankar <vshankar@redhat.com>
* features/changelog: Fixing Deference after null checkarao2015-03-311-1/+1
| | | | | | | | | | | | | | | CID: 1124481 The goto label 'out' was trying to dereference a pointer which might be null, hence a check on not null is made before the use of it. Change-Id: I813e523207b8218a7a28c2b3ac36a8e472e36c89 BUG: 789278 Signed-off-by: arao <arao@redhat.com> Reviewed-on: http://review.gluster.org/9617 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* changelog xlator: avoid unsupported threaded event-poll usageEmmanuel Dreyfus2015-03-301-10/+5
| | | | | | | | | | | | | | | | | | | | | The changelog xlator was modified to use a poller thread, which uses the same event pool as the xlator stack. Unfortunately, such threaded usage of event pool is not supported by event-poll code, only event-epoll supports it. As a result, platforms such as NetBSD that lack epoll support got broken. The fix is to remove the poller thread, which does not cause any functionnality loss because the xlator stack event poll is functionnal. That lets NetBSD pass AFR tests again. BUG: 1129939 Change-Id: I3d73cf58e2ed8d92d9e0191f7abda3c37dea4159 Signed-off-by: Emmanuel Dreyfus <manu@netbsd.org> Reviewed-on: http://review.gluster.org/10030 Reviewed-by: Krishnan Parthasarathi <kparthas@redhat.com> Reviewed-by: Venky Shankar <vshankar@redhat.com> Tested-by: Venky Shankar <vshankar@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com>
* features/bit-rot: Implementation of bit-rot xlatorVenky Shankar2015-03-242-118/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is the "Signer" -- responsible for signing files with their checksums upon last file descriptor close (last release()). The event notification facility provided by the changelog xlator is made use of. Moreover, checksums are as of now SHA256 hash of the object data and is the only available hash at this point of time. Therefore, there is no special "what hash to use" type check, although it's does not take much to add various hashing algorithms to sign objects with. Signatures are stored in extended attributes of the objects along with the the type of hashing used to calculate the signature. This makes thing future proof when other hash types are added. The signature infrastructure is provided by bitrot stub: a little piece of code that sits over the POSIX xlator providing interfaces to "get or set" objects signature and it's staleness. Since objects are signed upon receiving release() notification, pre-existing data which are "never" modified would never be signed. To counter this, an initial crawler thread is spawned The crawler scans the entire brick for objects that are unsigned or "missed" signing due to the server going offline (node reboots, crashes, etc..) and triggers an explicit sign. This would also sign objects when bit-rot is enabled for a volume and/or after upgrade. Change-Id: I1d9a98bee6cad1c39c35c53c8fb0fc4bad2bf67b BUG: 1170075 Original-Author: Raghavendra Bhat <raghavendra@redhat.com> Signed-off-by: Venky Shankar <vshankar@redhat.com> Reviewed-on: http://review.gluster.org/9711 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* Bitrot StubVenky Shankar2015-03-241-6/+16
| | | | | | | | | | | | | Bitrot stub implements object versioning required for identifying signature freshness. More details about versioning is explained as a part of the "bitrot feature documentation" patch. Change-Id: I2ad70d9eb109ba4a12148ab8d81336afda529ad9 BUG: 1170075 Signed-off-by: Venky Shankar <vshankar@redhat.com> Reviewed-on: http://review.gluster.org/9709 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* features/changelog: Make use of IPC fopVenky Shankar2015-03-241-0/+46
| | | | | | | | | | | | | Translators which wish to send event notifications can send "down" an IPC FOP with op_type as GF_IPC_TARGET_CHANGELOG and xdata carrying event structures (changelog_event_t). Change-Id: I0e5f8c9170161c186f0e58d07105813e34e18786 BUG: 1170075 Signed-off-by: Venky Shankar <vshankar@redhat.com> Reviewed-on: http://review.gluster.org/9775 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* libgfchangelog: cleanups on disconnectionVenky Shankar2015-03-245-140/+280
| | | | | | | | | | | | | | | | | | | | | | | [WIP patch as of now, just needs a little tweak] A pending TODO in the code caused regressions to fail as bitrot daemons are spawned during volume start (equivalent to enabling bitrot by default). The problematic part that casued such failures is during brick disconnections with unsafe handling of event data structured in the code. With this patch, data structures are properly cleaned up with care taken to cleanup all accessors first. This also fixes potential memory leaks which was bluntly ignored before. Change-Id: I70ed82cb1a0fb56c85ef390007e321a97a35c5ce BUG: 1170075 Signed-off-by: Venky Shankar <vshankar@redhat.com> original-author: Venky Shankar <vshankar@redhat.com> Reviewed-on: http://review.gluster.org/9959 Reviewed-by: Vijay Bellur <vbellur@redhat.com> Tested-by: Vijay Bellur <vbellur@redhat.com>
* libgfchangelog: Fix faulty reference to xlator contextVenky Shankar2015-03-244-55/+98
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Problem: libgfchangelog initializes global xlator on library load (via constructor: _ctor) and mangles it's xlator context thereby messing with certain important members of the command structure. On receiving an RPC disconnection event, if the point-of-execution was in libgfchangelogs context, accessing ->cmd_args during RPC notify resulted in a segfault. Fix: Since the libarary needs to be able to work with processes that have a notion of an xlator (THIS in particular) and without it, care needs to be taken to allocate the global xlator when needed. Moreover, the actual fix is to use the correct xlator context in both cases. A new API is introduces when needs to be invoked by the conusmer (although this could have been done during register() call, keeping it a separate API makes thing flexible and easy). Test: The issue is observed when a brick process goes offline. This is triggered when test cases (.t's) are run in bulk, since each test essestially spawns bricks processes (on volume start) and terminates them (volume stop). Since bitrot daemon, as of now, spawns upon volume start, the issue is much observed when the volume is taken offline at the end of each test case. With this fix, running the basic and core test cases along with building the linux kernel has passed without daemon segfaults. Thanks to Johnny (rabhat@) for helping in debugging the issue (and with the fix :)). Change-Id: I8d3022bf749590b2ee816504ed9b1dfccc65559a BUG: 1170075 Signed-off-by: Venky Shankar <vshankar@redhat.com> Reviewed-on: http://review.gluster.org/9953 Reviewed-by: Vijay Bellur <vbellur@redhat.com> Tested-by: Vijay Bellur <vbellur@redhat.com>
* features/changelog: RPC'fy {libgf}changelogVenky Shankar2015-03-1829-1301/+3936
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch introduces RPC based communication between the changelog translator and libgfchangelog. It replaces the old pathetic stream based interaction that existed earlier (due to time constraints :-/). Changelog, upon initialization starts a RPC server (rpcsvc) allowing clients to invoke a probe API as a bootup mechanism to request for event notifications. During probe, clients can choose an event filter specifying the type(s) of events they are interested in. As of now there is no way to change the event notification set once the probe RPC call is made, but that is easier to implement. The actual event notifications is done on a separate RPC session. The client (libgfchangelog) itself starts and RPC server which the changelog translator "connects back" during probe. Notifications are dispatched by a bunch of threads from the server (translator) and the client optionally orders them if ordered notifications are requried. FOPs fill in their respective event details in a buffer (rot-buffs to be particular) and a bunch of threads (consumers) swap the buffers out of roatation and dispatch them via RPC. To avoid writer starvation, then number of dispatcher threads is one less than the number of buffer list in rot-buffs.x libgfchangelog becomes purely callback based -- upon event notification from the server (and re-ordering them if required) invoke a callback routine specified by consumer(s). A major part of the patch is also aimed at providing backward compatibility for geo-replication, which was one of the main consumer of the stream based API. Also, this patch does not\ "turn on" event notifications for all fops, just a bunch which is currently in requirement. Another pain point is that the server does not filter events before dispatching it to the clients. That load is taken up by the client itself (although it's done at the library layer rather than making it hard on the callback implementor). This needs improvement and care needs to be taken to not load the server up with expensive filtering mechanisms. Change-Id: Ibf60a432b68f2dfa60c6f9add2bcfd37a9c41395 BUG: 1170075 Signed-off-by: Venky Shankar <vshankar@redhat.com> Reviewed-on: http://review.gluster.org/9708 Reviewed-by: Jeff Darcy <jdarcy@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* changelog: Unchecked buffer fill in gf_history_changelog_next_changeNiels de Vos2015-03-041-0/+5
| | | | | | | | | | | | | | | | | | | A gf_history_changelog_next_change() calls gf_readline() to fill a buffer without checking buffer size. The size of maxlen is not verified to be less than the lenght of buffer. This could result in the over filling of buffer of maxlen is greater than PATH_MAX. Check the size of maxlen to be less than PATH_MAX and return a fail code as needed. BUG: 1174017 Change-Id: Ic53b1a6e25af69a339bc15fb2d233dc1e457910f Reported-by: Keith Schincke <kschinck@redhat.com> Signed-off-by: Niels de Vos <ndevos@redhat.com> Reviewed-on: http://review.gluster.org/9275 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Venky Shankar <vshankar@redhat.com> Tested-by: Venky Shankar <vshankar@redhat.com>
* feature/changelog: Fix changelog and history scan failure.Kotresh HR2015-01-271-2/+4
| | | | | | | | | | | | | Fixes bad file descriptor issue while cleaning up scratch directory during gf_changelog_register. Change-Id: Ia6aa8d55dcc2209144b48b6583681a155d919c42 BUG: 1162057 Signed-off-by: Kotresh HR <khiremat@redhat.com> Reviewed-on: http://review.gluster.org/9495 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Venky Shankar <vshankar@redhat.com> Tested-by: Venky Shankar <vshankar@redhat.com>
* features/changelog: Cleanup .processing and .current directoryAravinda VK2015-01-181-0/+21
| | | | | | | | | | | | | | | | | On changelog_register cleanup .processing, .history/.processing, .current and .history/.current from the working directory. Moved glusterd_recursive_rmdir and glusterd_for_each_entry to common place(libglusterfs) and renamed as recursive_rmdir and GF_FOR_EACH_ENTRY_IN_DIR respectively BUG: 1162057 Change-Id: I1f98468a344cead039026762a805437b2f9e507b Signed-off-by: Aravinda VK <avishwan@redhat.com> Reviewed-on: http://review.gluster.org/9082 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Venky Shankar <vshankar@redhat.com> Tested-by: Venky Shankar <vshankar@redhat.com>