glusterfs.git/tests, branch v3.5.0qa3

posix: do not allow to set/get "trusted.glusterfs.volume-id" xattr

2013-11-26T19:00:18+00:00

Change-Id: I2e9a2264b1fd5ebc1ed0aff30225e89acbd0bcb4
BUG: 1034716
Signed-off-by: Vijaykumar M 
Reviewed-on: http://review.gluster.org/6361
Tested-by: Gluster Build System 
Reviewed-by: Anand Avati

cli/glusterd: Changes to quota command Quota feature

2013-11-26T18:25:27+00:00

 re-work.

Following are the cli commands that are new/re-worked:
======================================================

volume quota  {enable|disable|list [ ...]|remove | default-soft-limit } |
volume quota  {limit-usage   []} |
volume quota  {alert-time|soft-timeout|hard-timeout} {}
volume status [all |  [nfs|shd||quotad]] [detail|clients|mem|inode|fd|callpool]
volume statedump  [nfs|quotad] [all|mem|iobuf|callpool|priv|fd|inode|history]

glusterd changes:
=================
* Quota limits are now set as extended attributes by glusterd from
  the aux mount created by the cli.
* The gfids of the directories on which quota limits are set
  for a given volume are stored in
  /var/lib/glusterd/vols//quota.conf file in binary format,
  and whose cksum and version is stored in
  /var/lib/glusterd/vols//quota.cksum.

Original-author: Krutika Dhananjay 
Original-author: Krishnan Parthasarathi 

BUG: 969461
Change-Id: If32bba36c67f9c2a30417af9c6389045b2b7c13b
Signed-off-by: Krutika Dhananjay 
Signed-off-by: Raghavendra G 
Reviewed-on: http://review.gluster.org/6003
Tested-by: Gluster Build System 
Reviewed-by: Anand Avati

features/quota: Improvements to quota

2013-11-26T18:24:02+00:00

* Two stages of quota enforcement is done:

  Soft and hard quota Upon reaching soft quota limit on the directory
  it logs/alerts in the quota daemon log (ie DEFAULT_LOG_DIR/quotad.log)
  and no more writes allowed after hard
  quota limit. After reaching the soft-limit the daemon alerts the
  user/admin repeatively for every 'alert-time', which is
  configurable.

* Quota enforcer is moved to server-side.

  It  takes care of enforcing quota. Since enforcer doesn't have the
  cluster view, it relies on another service called
  quota-aggregator. Aggregator, on query can return the size of a
  directory based on the cluster view.

  Enforcer is always loaded in the server graph and is by passed if
  the feature is not enabled.

  Options specific to enforcer:

  server-quota - Specifies whether the feature is on/off. It is used
  to by pass the quota if turned off.

  deem-statfs - If set to on, it takes quota limits into consideration
  while estimating fs size. (df command). The algorithm followed is,
  i.   Adjust statvfs based on limit configured on root.
  ii.  If limit is set on the inode passed, use size/limits on that inode to
       populate statvfs. Otherwise, use size/limits configured on root.
  iii. Upon statvfs, update the ctx->size on the inode.
  iv.  Don't let DHT aggregate, instead take the maximum of the usages from the
       subvols of the DHT, since each of it contains the complete information.

  Enforcer also makes use of gfid-to-path conversion functionality to
  work correctly when a client like nfs predominently relies on
  nameless lookups.

* Quota Aggregator acts as a thin client to provide cluster view

  Its a lightweight *gluster client* process with no mount point,
  started upon enabling quota or restarting the volume. This is a
  single process run on each brick, which can answer queries on all
  volumes in the cluster. Its volfile stored in
  GLUSTERD_DEFAULT_WORKING_DIR/quotad/quotad.vol.

Credits:
Raghavendra Bhat        
Varun Shastry           
Shishir Gowda           
Kruthika Dhananjay      
Brian Foster            
Krishnan Parthasarathi  

Change-Id: Id1cb25b414951da34c665a55f77385d482e0f9de
BUG: 969461
Signed-off-by: Raghavendra G 
Reviewed-on: http://review.gluster.org/5952
Tested-by: Gluster Build System 
Reviewed-by: Anand Avati

posix: placeholders for GFID to path conversion

2013-11-26T18:22:40+00:00

what?
=====
    The following is an attempt to generate the paths of a file when
    only its gfid is known.

    To find the path of a directory, the symlink handle to the
    directory maintained in  the ".glusterfs" backend directory is
    read. The symlink handle is generated using the gfid of the
    directory. It (handle) contains the directory's name and parent
    gfid, which are used to recursively construct the absolute path as
    seen by the user from the mount point.

    A similar approach cannot be used for a regular file or a symbolic
    link since its hardlink handle, generated using its gfid, doesn't
    contain its parent gfid and basename. So xattrs are set to store
    the parent gfids and the number of hardlinks to a file or a
    symlink having the same parent gfid.  When an user/application
    requests for the paths of a regular file or a symlink with
    multiple hardlinks, using the parent gfids stored in the xattrs,
    the paths of the parent directories are generated as mentioned
    earlier. The base names of the hardlinks (with the same parent
    gfid) are determined by matching the actual backend inode numbers
    of each entry in the parent directory with that of the hardlink
    handle.

    Xattr is set on a regular file, link, and symbolic link as
    follows, Xattr name : trusted.pgfid. Xattr value :
    

    If a regular file, hard link, symbolic link is created then an
    xattr in the above format is set in the backend.

how to use?
===========
    This functionality can be used through getxattr interface. Two
    keys - glusterfs.ancestry.dentry and glusterfs.ancestry.path - enable
    usage of this functionality. A successful getxattr will have the
    result stored under same keys. Values will be,

    glusterfs.ancestry.dentry:
    --------------------------
    A linked list of gf-dirent structures for all possible paths from
    root to this gfid. If there are multiple paths, the linked-list
    will be a series of paths one after another. Each path will be a
    series of dentries representing all components of the path. This
    key is primarily for internal usage within glusterfs.

    glusterfs.ancestry.path:
    ------------------------
    A string containing all possible paths from root to this gfid.
    Multiple hardlinks of a file or a symlink are displayed as a colon
    seperated list (this could interfere with path components
    containing ':').

    e.g. If there is a file "file1" in root directory with two hardlinks,
         "/dir2/link2tofile1" and "/dir1/link1tofile1", then

         [root@alpha gfsmntpt]# getfattr -n glusterfs.ancestry.path -e text
          file1
          glusterfs.ancestry.path="/file1:/dir2/link2tofile1:/dir1/link1tofile1"

    Thanks Amar, Avati and Venky for the inputs.

Original Author: Ramana Raja 
BUG: 990028
Signed-off-by: Raghavendra G 
Change-Id: I0eaa9101e333e0c1f66ccefd9e95944dd4a27497
Reviewed-on: http://review.gluster.org/5951
Tested-by: Gluster Build System 
Reviewed-by: Anand Avati

cluster/afr: Provide HA for pathinfo getxattr

2013-11-26T08:34:14+00:00

Problem:
afr_[f]getxattr_pathinfo_cbks fail the fop even when it succeeded on
one of the bricks. This can happen if the last response to pathinfo
[f]getxattr is a failure.

Fix:
Remember if any of the [f]getxattr_pathinfos are successful and send
that as the op_ret/op_errno value to the xlators above.

Note:
Winding fop to a client xlator that is not connected to server produces
an error log. Preventing that by not even winding fop when client xlator
is DOWN.

Change-Id: I846e8c47423ffcfa2eabffe8924534781a36841a
BUG: 1032927
Signed-off-by: Pranith Kumar K 
Reviewed-on: http://review.gluster.org/6332
Reviewed-by: Vijay Bellur 
Tested-by: Gluster Build System

tests: add EXPECT_NOT macro

2013-11-25T04:28:38+00:00

We needed this macro while writing test cases for quota. With quota,
a directory size is only guaranteed to be within some margin of quota
limit, but not an accurate number. With not knowing what size to
expect and EXPECT macro not complete enough to accept ranges of sizes,
we can atleast write test-cases with EXPECT_NOT macro. After copying
data to an empty file, it will be guaranteed the size will not be
zero. This is good enough for quota test cases.

Change-Id: I722ebd68044716a5eeaf0bd7e9aae61df8469017
BUG: 1022995
Signed-off-by: Raghavendra G 
Reviewed-on: http://review.gluster.org/6253
Tested-by: Gluster Build System 
Reviewed-by: Anand Avati

fuse: Check the return status from state->resolve_now

2013-11-15T01:47:59+00:00

Change-Id: I85fc6dd393449d365bb908b38c2827b58cb08171
BUG: 1030208
Signed-off-by: Vijaykumar M 
Reviewed-on: http://review.gluster.org/6262
Tested-by: Gluster Build System 
Reviewed-by: Anand Avati

bd: Add test case for bd xlator

2013-11-13T19:39:30+00:00

Change-Id: I73a0bfa7085d2e71b2489687fa53f5fe7d1e8ea1
BUG: 1028672
Signed-off-by: M. Mohan Kumar 
Reviewed-on: http://review.gluster.org/6050
Tested-by: Gluster Build System 
Reviewed-by: Anand Avati

bd_map: Remove bd_map xlator

2013-11-13T19:38:28+00:00

Remove bd_map xlator and CLI related changes.

Change-Id: If7086205df1907127c1a1fa4ba603f1c48421d09
BUG: 1028672
Signed-off-by: M. Mohan Kumar 
Reviewed-on: http://review.gluster.org/5747
Tested-by: Gluster Build System 
Reviewed-by: Anand Avati

features/compress: Compression/DeCompression translator

2013-11-12T03:35:01+00:00

* 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 :
   + 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  compress on

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

Change-Id: Ib7a66b6f1f70fe002b7c513588cdf75c69370805
BUG: 923540
Original-author : Venky Shankar 
Signed-off-by: Venky Shankar 
Signed-off-by: Prashanth Pai 
Signed-off-by: Prashanth Pai 
Reviewed-on: http://review.gluster.org/3251
Tested-by: Gluster Build System 
Reviewed-by: Vijay Bellur