glusterfs.git/xlators/cluster/afr/src, branch v4.0dev1

cluster/afr: Honor default timeout of 5min for analyzing split-brain files

2017-10-30T15:57:13+00:00

Problem:
After setting split-brain-choice option to analyze the file to resolve
the split brain using the command
"setfattr -n replica.split-brain-choice -v "choiceX" "
should allow to access the file from mount for default timeout of 5mins.
But the timeout was not honored and was able to access the file even after
the timeout.

Fix:
Call the inode_invalidate() in afr_set_split_brain_choice_cbk() so that
it will triger the cache invalidate after resetting the timer and the
split brain choice. So the next calls to access the file will fail with EIO.

Change-Id: I698cb833676b22ff3e4c6daf8b883a0958f51a64
BUG: 1503519
Signed-off-by: karthik-us

cluster/afr: Fail open on split-brain

2017-10-26T18:23:35+00:00

Problem:
Append on a file with split-brain succeeds. Open is intercepted by open-behind,
when write comes on the file, open-behind does open+write. Open succeeds
because afr doesn't fail it. Then write succeeds because write-behind
intercepts it. Flush is also intercepted by write-behind, so the application
never gets to know that the write failed.

Fix:
Fail open on split-brain, so that when open-behind does open+write open fails
which leads to write failure. Application will know about this failure.

Change-Id: I4bff1c747c97bb2925d6987f4ced5f1ce75dbc15
BUG: 1294051
Signed-off-by: Pranith Kumar K

afr: heal gfid as a part of entry heal

2017-10-09T06:23:08+00:00

Problem:
If a brick crashes after an entry (file or dir) is created but before
gfid is assigned, the good bricks will have pending entry heal xattrs
but the heal won't complete because afr_selfheal_recreate_entry() tries
to create the entry again and it fails with EEXIST.

Fix:
We could have fixed posx_mknod/mkdir etc to assign the gfid if the file
already exists but the right thing to do seems to be to trigger a lookup
on the bad brick and let it heal the gfid instead of winding an
mknod/mkdir in the first place.

Change-Id: I82f76665a7541f1893ef8d847b78af6466aff1ff
BUG: 1493415
Signed-off-by: Ravishankar N

xlator/cluster/afr:coverity Issue "UNUSED_VALUE" in afr_get_split_brain_status

2017-10-05T18:16:07+00:00

Issue: Event value_overwrite:Overwriting previous write to "ret"
with value "-1".

Fix : An "If" condition is added to check the value of "ret".

Change-Id: I7b6bd4f20f73fa85eb8a5169644e275c7b56af51
BUG: 789278
Signed-off-by: Subha sree Mohankumar

cluster/afr: Make choose-local "reconfigurable"

2017-09-30T02:15:21+00:00

With this change, enabling choose-local (which means its state makes
transition from "off" to "on") will be effective after the first
gfid-lookup on "/" since volume-set was executed.

Change-Id: Ibab292ba705d993b475cd0303fb3318211fb2500
BUG: 1480525
Signed-off-by: Krutika Dhananjay

afr: don't check for file size in afr_mark_source_sinks_if_file_empty

2017-09-27T03:03:40+00:00

... for AFR_METADATA_TRANSACTION and just mark source and sinks if
metadata is the same.

Change-Id: I69e55d3c842c7636e3538d1b57bc4deca67bed05
BUG: 1491670
Signed-off-by: Ravishankar N

afr: auto-resolve split-brains for zero-byte files

2017-09-26T04:04:18+00:00

Problems:
As described in BZ 1491670, renaming hardlinks can result in data/mdata
split-brain of the DHT link-to files (T files) without any mismatch of
data and metadata.

As described in BZ 1486063, for a zero-byte file with only dirty bits
set, arbiter brick will likely be chosen as the source brick.

Fix:
For zero byte files in split-brain, pick first brick as
a) data source if file size is zero on all bricks.
b) metadata source if metadata is the same on all bricks

In arbiter case, if file size is zero on all bricks and there are no
pending afr xattrs, pick 1st brick as data source.

Change-Id: I0270a9a2f97c3b21087e280bb890159b43975e04
BUG: 1491670
Signed-off-by: Ravishankar N 
Reported-by: Rahul Hinduja 
Reported-by: Mabi

cluster/afr: Sending subvol up/down events when subvol comes up or goes down

2017-09-20T13:33:06+00:00

Change-Id: I6580351b245d5f868e9ddc6a4eb4dd6afa3bb6ec
BUG: 1493539
Signed-off-by: karthik-us

afr: discover/lookup heal fixes

2017-09-04T05:31:31+00:00

Addresses review comments in commit 468ca877807625817b72921d1e9585036687b640

Change-Id: I04b1bd3b00abfd6758798d6272954e36a24249a9
BUG: 1473636
Signed-off-by: Ravishankar N 
Reviewed-on: https://review.gluster.org/18187
Smoke: Gluster Build System 
CentOS-regression: Gluster Build System 
Reviewed-by: Pranith Kumar Karampuri

afr: check validity of afr_reply

2017-08-31T09:40:58+00:00

...in various self-heal code paths.

Originally found by Pranith in __afr_selfheal_name_impunge ()

Also change __afr_selfheal_assign_gfid() to send lookup only on those
bricks that don't have a gfid matching that of the source.

Change-Id: I70a2ccd750a2af92c5fc36e0eefb2b6125404b4a
BUG: 1482923
Signed-off-by: Pranith Kumar K 
Signed-off-by: Ravishankar N 
Reviewed-on: https://review.gluster.org/18065
Smoke: Gluster Build System 
CentOS-regression: Gluster Build System