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EC uses mmap() to create a memory area for the dynamic code. Since
the code is created on the fly and executed when needed, this region
of memory needs to have write and execution privileges.
This combination is not allowed by default by selinux. To solve the
problem a file is used as a backend storage for the dynamic code and
it's mapped into two distinct memory regions, one with write access
and the other one with execution access. This approach is the
recommended way to create dynamic code by a program in a more secure
way, and selinux allows it.
Additionally selinux requires that the backend file be stored in a
directory marked with type bin_t to be able to map it in an executable
area. To satisfy this condition, GLUSTERFS_LIBEXECDIR has been used.
This fix also changes the error check for mmap(), that was done
incorrectly (it checked against NULL instead of MAP_FAILED), and it
also correctly propagates the error codes and makes sure they aren't
silently ignored.
> Change-Id: I71c2f88be4e4d795b6cfff96ab3799c362c54291
> BUG: 1402661
> Signed-off-by: Xavier Hernandez <xhernandez@datalab.es>
> Reviewed-on: https://review.gluster.org/16405
> Smoke: Gluster Build System <jenkins@build.gluster.org>
> NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
> CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
> Reviewed-by: Jeff Darcy <jdarcy@redhat.com>
Change-Id: I5c2dd51b1161505316c8f78b73e9a585d0c115d0
BUG: 1418650
Signed-off-by: Xavier Hernandez <xhernandez@datalab.es>
Reviewed-on: https://review.gluster.org/16522
Smoke: Gluster Build System <jenkins@build.gluster.org>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Shyamsundar Ranganathan <srangana@redhat.com>
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This patch implements functionalities for fast encoding/decoding
using hardware support. Currently optimized x86_64, SSE and AVX is
added.
Additionally this patch implements a caching mecanism for inverse
matrices to reduce computation time, as well as a new method for
computing the inverse that takes quadratic time instead of cubic.
Finally some unnecessary memory copies have been eliminated to
further increase performance.
Change-Id: I26c75f26fb4201bd22b51335448ea4357235065a
BUG: 1289922
Signed-off-by: Xavier Hernandez <xhernandez@datalab.es>
Reviewed-on: http://review.gluster.org/12837
Tested-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
Smoke: Gluster Build System <jenkins@build.gluster.org>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
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Change-Id: I82e245615419c2006a2d1b5e94ff0908d2f5e891
BUG: 1245276
Signed-off-by: Xavier Hernandez <xhernandez@datalab.es>
Reviewed-on: http://review.gluster.org/11741
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
Tested-by: NetBSD Build System <jenkins@build.gluster.org>
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Change-Id: Ia05ae750a245a37d48978e5f37b52f4fb0507a8c
BUG: 1194640
Signed-off-by: Nandaja Varma <nandaja.varma@gmail.com>
Reviewed-on: http://review.gluster.org/10465
Tested-by: NetBSD Build System <jenkins@build.gluster.org>
Reviewed-by: Xavier Hernandez <xhernandez@datalab.es>
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