glusterfs.git/xlators, branch v3.7.14

storage/posix: Look for file in "unlink" dir IFF open on real-path fails with ENOENT

2016-07-30T12:29:39+00:00

        Backport of: http://review.gluster.org/#/c/15039/

PROBLEM:
In some of our users' setups, open() on the anon fd failed for
a reason other than ENOENT. But this error code is getting masked
by a subsequent open() under posix's hidden "unlink" directory, which
will fail with ENOENT because the gfid handle still exists under .glusterfs.
And the log message following the two open()s ends up logging ENOENT,
causing much confusion.

FIX:
Look for the presence of the file under "unlink" ONLY if the open()
on the real_path failed with ENOENT.

Change-Id: Id68bbe98740eea9889b17f8ea3126ed45970d26f
BUG: 1360785
Signed-off-by: Krutika Dhananjay 
Reviewed-on: http://review.gluster.org/15041
Smoke: Gluster Build System 
Reviewed-by: Pranith Kumar Karampuri 
NetBSD-regression: NetBSD Build System 
CentOS-regression: Gluster Build System

protocol/client: Filter o-direct in readv/writev

2016-07-30T01:37:53+00:00

 >Change-Id: I519c666b3a7c0db46d47e08a6a7e2dbecc05edf2
 >BUG: 1322214
 >Signed-off-by: Pranith Kumar K 
 >Reviewed-on: http://review.gluster.org/14215
 >Smoke: Gluster Build System 
 >NetBSD-regression: NetBSD Build System 
 >CentOS-regression: Gluster Build System 
 >Reviewed-by: Krutika Dhananjay 
 >(cherry picked from commit 74837896c38bafdd862f164d147b75fcbb619e8f)

BUG: 1360785
Pranith Kumar K 

Change-Id: Ib4013b10598b0b988b9f9f163296b6afa425f8fd
Reviewed-on: http://review.gluster.org/15050
Tested-by: Pranith Kumar Karampuri 
Smoke: Gluster Build System 
NetBSD-regression: NetBSD Build System 
CentOS-regression: Gluster Build System 
Reviewed-by: Pranith Kumar Karampuri

cluster/ec: Unlock stale locks when inodelk/entrylk/lk fails

2016-07-30T01:04:22+00:00

Thanks to Rafi for hinting a while back that this kind of
problem he saw once. I didn't think the theory was valid.
Could have caught it earlier if I had tested his theory.

 >Change-Id: Iac6ffcdba2950aa6f8cf94f8994adeed6e6a9c9b
 >BUG: 1344836
 >Signed-off-by: Pranith Kumar K 
 >Reviewed-on: http://review.gluster.org/14703
 >Reviewed-by: Xavier Hernandez 
 >Smoke: Gluster Build System 
 >Tested-by: mohammed rafi  kc 
 >NetBSD-regression: NetBSD Build System 
 >CentOS-regression: Gluster Build System 

BUG: 1361402
Change-Id: If9ccf0b3db7159b87ddcdc7b20e81cde8c3c76f0
Signed-off-by: Pranith Kumar K 
Reviewed-on: http://review.gluster.org/15040
Smoke: Gluster Build System 
NetBSD-regression: NetBSD Build System 
Reviewed-by: Xavier Hernandez 
CentOS-regression: Gluster Build System

storage/posix: Give correct errno for anon-fd operations

2016-07-29T16:00:46+00:00

 >Change-Id: Ia9e61d3baa6881eb7dc03dd8ddb6bfdde5a01958
 >BUG: 1343906
 >Signed-off-by: Pranith Kumar K 
 >Reviewed-on: http://review.gluster.org/14669
 >Smoke: Gluster Build System 
 >NetBSD-regression: NetBSD Build System 
 >CentOS-regression: Gluster Build System 
 >Reviewed-by: Raghavendra G 

BUG: 1360140
Change-Id: I553dd59424aaff9538e0798370846d653ca1cf32
Signed-off-by: Pranith Kumar K 
Reviewed-on: http://review.gluster.org/15011
Smoke: Gluster Build System 
NetBSD-regression: NetBSD Build System 
CentOS-regression: Gluster Build System 
Reviewed-by: Krutika Dhananjay

afr: some coverity fixes

2016-07-28T13:54:36+00:00

Backport of http://review.gluster.org/#/c/14895/

Thanks to Krutika for a cleaner way to track inode refs in
afr_set_split_brain_choice().

Change-Id: I2d968d05b815ad764b7e3f8aa9ad95a792b3c1df
BUG: 1360549
Signed-off-by: Ravishankar N 
Reviewed-on: http://review.gluster.org/15017
Smoke: Gluster Build System 
NetBSD-regression: NetBSD Build System 
CentOS-regression: Gluster Build System 
Reviewed-by: Krutika Dhananjay 
Reviewed-by: Pranith Kumar Karampuri

features/ctr: Check for NULL local

2016-07-27T12:58:27+00:00

This is a defensive fix to prevent a crash reported
during a rename operation. This is not reproducible
under normal circumstances.

This patch also moves ctr-messages.h to the src dir
of the changetimerecorder xlator.

Backported from master: http://review.gluster.org/#/c/14964/

Change-Id: I2aac2d4da5752f6a0b45a70e0d97a4d506532ff4
BUG: 1360125
Signed-off-by: N Balachandran 
Reviewed-on: http://review.gluster.org/15007
Smoke: Gluster Build System 
NetBSD-regression: NetBSD Build System 
CentOS-regression: Gluster Build System 
Reviewed-by: Milind Changire 
Reviewed-by: Dan Lambright

changelog/rpc: Fix rpc_clnt_t mem leaks

2016-07-27T10:13:33+00:00

Backport of http://review.gluster.org/13658

PROBLEM:
   1. Freeing up rpc_clnt object might lead to crashes. Well,
      it was not a necessity to free rpc-clnt object till now
      because all the existing use cases needs to reconnect
      back on disconnects. Hence timer code was not taking
      ref on rpc-clnt object.

      Glusterd had some use-cases that led to crash due to
      ping-timer and they fixed only those code paths that
      involve ping-timer.

      Now, since changelog has an use-case where rpc-clnt
      need to be freed up, we need to fix timer code to take
      refs

   2. In changelog, because of issue 1, only mydata was being
      freed which is incorrect. And there are races where
      rpc-clnt object would access the freed mydata which
      would lead to crashes.

      Since changelog xlator resides on brick side and is long
      living process, if multiple libgfchangelog consumers
      register to changelog and disconnect/reconnect mulitple
      times, it would result in leak of 'rpc-clnt' object
      for every connect/disconnect.

SOLUTION:
   1. Handle ref/unref of 'rpc_clnt' structure in timer
      functions properly.
   2. In changelog, unref 'rpc_clnt' in RPC_CLNT_DISCONNECT
      after disabling timers and free mydata on RPC_CLNT_DESTROY.

RPC SETUP IN CHANGELOG:
   1. changelog xlator initiates rpc server say 'changelog_rpc_server'
   2. libgfchangelog initiates one rpc server say 'libgfchangelog_rpc_server'
   3. libgfchangelog initiates rpc client and connects to 'changelog_rpc_server'
   4. In return changelog_rpc_server initiates a rpc client and connects back
      to 'libgfchangelog_rpc_server'

REF/UNREF HANDLING IN TIMER FUNCTIONS:
Let's say rpc clnt refcount = 1
   1. Take the ref before reigstering callback to timer queue
           >>>>  rpc_clnt_ref (say ref count becomes = 2)
   2. Register a callback to timer say 'callback1'
   3. If register fails:
           >>>> rpc_clnt_unref (ref count = 1)
   4. On timer expiration, 'callback1' gets called. So unref rpc clnt at the end
      in 'callback1'. This is corresponding to ref taken in step 1
           >>>> rpc_clnt_unref (ref count = 1)
   5. The cycle from step-1 to step-4 continues....until timer cancel event happens
   6. timer cancel of say 'callback1'
           If timer cancel fails:
                 Do nothing, Step-4 would have unrefd
           If timer cancel succeeds:
                 >>>> rpc_clnt_unref (ref count = 1)

Change-Id: I91389bc511b8b1a17824941970ee8d2c29a74a09
BUG: 1359363
Signed-off-by: Kotresh HR 
(cherry picked from commit 637ce9e2e27e9f598a4a6c5a04cd339efaa62076)
Reviewed-on: http://review.gluster.org/14993
CentOS-regression: Gluster Build System 
Smoke: Gluster Build System 
NetBSD-regression: NetBSD Build System 
Reviewed-by: Raghavendra G

cluster/ec: Handle absence of keys in some callback dict

2016-07-27T07:00:04+00:00

Problem: This issue arises when we do a rolling update
from 3.7.5 to 3.7.9.
For 4+2 volume running 3.7.5, if we update 2 nodes
and after heal completion  kill 2 older nodes, this
problem can be seen. After update and killing of
bricks, 2 nodes will return inodelk count key in dict
while other 2 nodes will not have inodelk count in dict.
This is also true for get-link-count.
During dictionary match , ec_dict_compare, this will
lead to mismatch of answers and the file operation
on mount point will fail with IO error.

Solution:
Don't match inode, entry and link count keys while
comparing two dictionaries. However, while combining the
data in ec_dict_combine, go through all the dictionaries
and select the maximum values received in different dicts
for these keys.

master-
http://review.gluster.org/#/c/14761/

Change-Id: I33546e3619fe8f909286ee48fb0df2009cd3d22f
BUG: 1360152
Signed-off-by: Ashish Pandey 
Reviewed-on: http://review.gluster.org/14761
Reviewed-by: Xavier Hernandez 
Smoke: Gluster Build System 
Reviewed-by: Pranith Kumar Karampuri 
CentOS-regression: Gluster Build System 
NetBSD-regression: NetBSD Build System 
Signed-off-by: Ashish Pandey 
Reviewed-on: http://review.gluster.org/15012

feature/bitrot: Ignore files with sticky bit set

2016-07-22T17:21:42+00:00

Backport of http://review.gluster.org/14903

Scrubber scrubs entries in backend. It is scrubbing files with sticky
bit as well. This might include linkfiles which should be skipped.  This
patch adds the check to ignore linkfiles during scrub.

Change-Id: Ic21367b37770d391326c55c659491a1e5a82335b
BUG: 1359017
Signed-off-by: Kotresh HR 
(cherry picked from commit 8c47b19fc057f08c47444ef557503e610c707128)
Reviewed-on: http://review.gluster.org/14982
Smoke: Gluster Build System 
NetBSD-regression: NetBSD Build System 
CentOS-regression: Gluster Build System 
Reviewed-by: Vijay Bellur

feature/bitrot: Fix scrub status with sharded volume

2016-07-21T11:46:50+00:00

Backport of http://review.gluster.org/14927

Bitrot scrubs each shard entries separately. Scrub
statistics was counting each shard entry which is
incorrect. This patch skips the statistics count
for sharded entries.

Change-Id: I184c315a4bc7f2cccabc506eef083ee926ec26d3
BUG: 1357973
Signed-off-by: Kotresh HR 
(cherry picked from commit 1929141da34d36f537e9798e3618e0e3bdc61eb6)
Reviewed-on: http://review.gluster.org/14958
Smoke: Gluster Build System 
NetBSD-regression: NetBSD Build System 
CentOS-regression: Gluster Build System 
Reviewed-by: Jeff Darcy