posix: use the correct op_errno

Problem:
If readdir/fstat was performed on a directory that was removed,
posix_fd_ctx_get() fails with ENOENT but we incorrectly use the ret
value (-1 in this case) as op_errno, logging "Operation not permitted"
messages in the brick logs. Also in case of fstat, the -1 op_errno was
also propagated to the client via stack unwind, causing the message to
appear in protocol/client logs as well.

Fix:
Use the right op_errno in readdir, fstat and writev. Also, if
posix_fd_ctx_get() failed with ENOENT, convert it into EBADF because
ENOENT is not a valid error for an fd operation.

Change-Id: Ie43c0789d5040ec73b7cf885d015a183b8c64d70
BUG: 1456582
Signed-off-by: Ravishankar N <ravishankar@redhat.com>
Reviewed-on: https://review.gluster.org/17414
Smoke: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
Tested-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
Reviewed-by: Amar Tumballi <amarts@redhat.com>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>

0 files changed, 0 insertions, 0 deletions