Auto invalidation is necessary when same (meta)data is shared/access
across multiple mounts. However, if (meta)data is not shared, all
relevant I/O goes through the cache of single mount and hence is
coherent with (meta)data on bricks always. So, fuse-auto-invalidation
can be disabled for this case which gives a huge performance boost for
workloads that write data and then immediately read the data they just
wrote.

From glusterfs --help,

<snip>
      --auto-invalidation[=BOOL]   controls whether fuse-kernel can
                             auto-invalidate attribute, dentry and page-cache.
                             Disable this only if same files/directories are
                             not accessed across two different mounts
                             concurrently [default: "on"]
</snip>

Details on how disabling auto-invalidation helped to reduce pgbench
init times can be found at [1]. Time taken for pgbench init of scale
8000 was 8340s. That will be an improvement of 86% (59280s vs 8340s)
with auto-invalidations turned off along with other
optimizations. Just disabling auto-invalidation contributed 56%
improvement by reducing the total time taken by 33260s.

[1] https://www.spinics.net/lists/gluster-devel/msg25907.html

Change-Id: I0ed730dba9064bd9c576ad1800170a21e100e1ce
Signed-off-by: Raghavendra Gowdappa <rgowdapp@redhat.com>
updates: bz#1664934

This patch creates a specific function to set the thread name using a
string format and a variable argument list, like printf().

This function is used to set the thread name from gf_thread_create(),
which now accepts a variable argument list to create the full name. It's
not necessary anymore to use a local array to build the name of the
thread. This is done automatically.

Change-Id: Idd8d01fd462c227359b96e98699f8c6d962dc17c
Updates: bz#1193929
Signed-off-by: Xavi Hernandez <xhernandez@redhat.com>

A call to gf_backtrace_save() was done on each context switch of a
synctask. The backtrace is generated writing to the filesystem, so it
can have an important impact on latency.

The generated backtrace was not used anywhere, so it's been removed.

Change-Id: I399a93b932c5b6e981c696c72c3e1ef44710ba52
Updates: bz#1193929
Signed-off-by: Xavi Hernandez <xhernandez@redhat.com>

Problem: When rpc-transport-disconnect happens, server_connection_cleanup_flush_cbk() 
         is supposed to call rpc_transport_unref() after open-files on 
         that transport are flushed per transport.But open-fd-count is 
         maintained in bound_xl->fd_count, which can be incremented/decremented 
         cumulatively in server_connection_cleanup() by all transport 
         disconnect paths. So instead of rpc_transport_unref() happening 
         per transport, it ends up doing it only once after all the files 
         on all the transports for the brick are flushed leading to 
         rpc-leaks.

Solution: To avoid races maintain fd_cnt at client instead of maintaining
          on brick

Credits: Pranith Kumar Karampuri
Change-Id: I6e8ea37a61f82d9aefb227c5b3ab57a7a36850e6
fixes: bz#1668190
Signed-off-by: Mohit Agrawal <moagrawal@redhat.com>

gf_dirent struct has d_type variable which should check
with DT_DIR istead of IA_IFDIR or IA_IFDIR has to compare
with entry->d_stat.ia_type

Change-Id: Idf1059ce2a590734bc5b6adaad73604d9a708804
updates: bz#1653359
Signed-off-by: Mohammed Rafi KC <rkavunga@redhat.com>

This patch helps enable IPv6 connections in the cluster.
The default address-family is IPv4 without using this option explicitly.

When address-family is set to "inet6" in the /etc/glusterfs/glusterd.vol
file, the mount command-line also needs to have
-o xlator-option="transport.address-family=inet6" added to it.

This option also gets added to the brick command-line.
Snapshot and gfapi use-cases should also use this option to pass in the
inet6 address-family.

Change-Id: I97db91021af27bacb6d7578e33ea4817f66d7270
fixes: bz#1635863
Signed-off-by: Milind Changire <mchangir@redhat.com>

To avoid the warning and preparing for adding writesame support.

Updates: #617
Change-Id: I0710b1e4c240368a9bf52968bddc6e250ae2028d
Signed-off-by: Xiubo Li <xiubli@redhat.com>

Added functionality to gluster volume set auth.allow command to
accept CIDR IP addresses. Modified few functions to isolate cidr
feature so that it prevents other gluster commands such as peer
probe to use cidr format ip. The functions are modified in such
a way that they have an option to enable accepting of cidr
format for other gluster commands if required in furture.

updates: bz#1138841

Change-Id: Ie6734002a7078f1820e5df42d404411cce945e8b
Credits: Mohit Agrawal
Signed-off-by: Rinku Kothiya <rkothiya@redhat.com>

design reference: https://review.gluster.org/#/c/glusterfs-specs/+/21925/

This patch adds the lock preempt support.

Note: The current model stores lock enforcement information as separate
xattr on disk. There is another effort going in parallel to store this
in stat(x) of the file. This patch is self sufficient to add fencing
support. Based on the availability of the stat(x) support either I will
rebase this patch or we can modify the necessary bits post merging this
patch.

Change-Id: If4a42f3e0afaee1f66cdb0360ad4e0c005b5b017
updates: #466
Signed-off-by: Susant Palai <spalai@redhat.com>

Problem: In gluster code some of the places it call's get_new_dict
         to create a dictionary without taking reference so at the time
         of dict_unref it has become a leak

Solution: To resolve the same call dict_new instead of get_new_dict

updates bz#1650403
Change-Id: I3ccbbf5af07079a4fa09aad2cd0458c8625b2f06
Signed-off-by: Mohit Agrawal <moagrawal@redhat.com>