From 985ad852813b548d517d86c465ce743e40085ebc Mon Sep 17 00:00:00 2001 From: Krutika Dhananjay Date: Tue, 20 Sep 2016 12:05:23 +0530 Subject: [PATCH 097/141] performance/open-behind: Pass O_DIRECT flags for anon fd reads when required Backport of: http://review.gluster.org/15537 cherry-picked from a412a4f50d8ca2ae68dbfa93b80757889150ce99 Writes are already passing the correct flags at the time of open(). Also, make io-cache honor direct-io for anon-fds with O_DIRECT flag during reads. Change-Id: Ib777d3df8f3dca7bfa57edbd9a34a329699ff56a BUG: 1380638 Signed-off-by: Krutika Dhananjay Reviewed-on: https://code.engineering.redhat.com/gerrit/87139 Reviewed-by: Pranith Kumar Karampuri Tested-by: Pranith Kumar Karampuri --- xlators/performance/io-cache/src/io-cache.c | 45 ++++++-------------- xlators/performance/open-behind/src/open-behind.c | 22 ++++++---- 2 files changed, 28 insertions(+), 39 deletions(-) diff --git a/xlators/performance/io-cache/src/io-cache.c b/xlators/performance/io-cache/src/io-cache.c index 46e26bc..98c3774 100644 --- a/xlators/performance/io-cache/src/io-cache.c +++ b/xlators/performance/io-cache/src/io-cache.c @@ -893,29 +893,6 @@ ioc_release (xlator_t *this, fd_t *fd) return 0; } -/* - * ioc_readv_disabled_cbk - * @frame: - * @cookie: - * @this: - * @op_ret: - * @op_errno: - * @vector: - * @count: - * - */ -int32_t -ioc_readv_disabled_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int32_t op_ret, int32_t op_errno, struct iovec *vector, - int32_t count, struct iatt *stbuf, - struct iobref *iobref, dict_t *xdata) -{ - STACK_UNWIND_STRICT (readv, frame, op_ret, op_errno, vector, count, - stbuf, iobref, xdata); - return 0; -} - - int32_t ioc_need_prune (ioc_table_t *table) { @@ -1128,10 +1105,17 @@ ioc_readv (call_frame_t *frame, xlator_t *this, fd_t *fd, ioc_inode = (ioc_inode_t *)(long)tmp_ioc_inode; if (!ioc_inode) { /* caching disabled, go ahead with normal readv */ - STACK_WIND (frame, ioc_readv_disabled_cbk, - FIRST_CHILD (frame->this), - FIRST_CHILD (frame->this)->fops->readv, fd, size, - offset, flags, xdata); + STACK_WIND_TAIL (frame, FIRST_CHILD (frame->this), + FIRST_CHILD (frame->this)->fops->readv, fd, + size, offset, flags, xdata); + return 0; + } + + if (flags & O_DIRECT) { + /* disable caching for this fd, if O_DIRECT is used */ + STACK_WIND_TAIL (frame, FIRST_CHILD (frame->this), + FIRST_CHILD (frame->this)->fops->readv, fd, + size, offset, flags, xdata); return 0; } @@ -1165,10 +1149,9 @@ ioc_readv (call_frame_t *frame, xlator_t *this, fd_t *fd, if (!fd_ctx_get (fd, this, NULL)) { /* disable caching for this fd, go ahead with normal readv */ - STACK_WIND (frame, ioc_readv_disabled_cbk, - FIRST_CHILD (frame->this), - FIRST_CHILD (frame->this)->fops->readv, fd, size, - offset, flags, xdata); + STACK_WIND_TAIL (frame, FIRST_CHILD (frame->this), + FIRST_CHILD (frame->this)->fops->readv, fd, + size, offset, flags, xdata); return 0; } diff --git a/xlators/performance/open-behind/src/open-behind.c b/xlators/performance/open-behind/src/open-behind.c index efab885..00e8906 100644 --- a/xlators/performance/open-behind/src/open-behind.c +++ b/xlators/performance/open-behind/src/open-behind.c @@ -351,19 +351,25 @@ err: fd_t * -ob_get_wind_fd (xlator_t *this, fd_t *fd) +ob_get_wind_fd (xlator_t *this, fd_t *fd, uint32_t *flag) { - ob_conf_t *conf = NULL; - ob_fd_t *ob_fd = NULL; + fd_t *wind_fd = NULL; + ob_fd_t *ob_fd = NULL; + ob_conf_t *conf = NULL; conf = this->private; ob_fd = ob_fd_ctx_get (this, fd); - if (ob_fd && conf->use_anonymous_fd) - return fd_anonymous (fd->inode); + if (ob_fd && conf->use_anonymous_fd) { + wind_fd = fd_anonymous (fd->inode); + if ((ob_fd->flags & O_DIRECT) && (flag)) + *flag = *flag | O_DIRECT; + } else { + wind_fd = fd_ref (fd); + } - return fd_ref (fd); + return wind_fd; } @@ -378,7 +384,7 @@ ob_readv (call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size, conf = this->private; if (!conf->read_after_open) - wind_fd = ob_get_wind_fd (this, fd); + wind_fd = ob_get_wind_fd (this, fd, &flags); else wind_fd = fd_ref (fd); @@ -427,7 +433,7 @@ ob_fstat (call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *xdata) call_stub_t *stub = NULL; fd_t *wind_fd = NULL; - wind_fd = ob_get_wind_fd (this, fd); + wind_fd = ob_get_wind_fd (this, fd, NULL); stub = fop_fstat_stub (frame, default_fstat_resume, wind_fd, xdata); -- 1.7.1