Attachment 15433 Details for Bug 14098 – patch for v4-10

[patch] patch for v4-10

v4-10.patch (text/plain), 20.50 KB, created by Anoop C S on 2019-08-27 05:26:22 UTC

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Creator: Anoop C S

Created: 2019-08-27 05:26:22 UTC

Size: 20.50 KB

patch

obsolete

>From 28303e0a3928f38a51d25f1e2355fc4860fa05ed Mon Sep 17 00:00:00 2001
>From: Poornima G <pgurusid@redhat.com>
>Date: Wed, 24 Jul 2019 15:15:33 +0530
>Subject: [PATCH] vfs_glusterfs: Use pthreadpool for scheduling aio operations
>
>BUG: https://bugzilla.samba.org/show_bug.cgi?id=14098
>
>Signed-off-by: Poornima G <pgurusid@redhat.com>
>Reviewed-by: Guenther Deschner <gd@samba.org>
>Reviewed-by: Jeremy Allison <jra@samba.org>
>
>Autobuild-User(master): Jeremy Allison <jra@samba.org>
>Autobuild-Date(master): Fri Aug 23 18:40:08 UTC 2019 on sn-devel-184
>
>(cherry picked from commit d8863dd8cb74bb0534457ca930a71e77c367d994)
>---
> source3/modules/vfs_glusterfs.c | 562 +++++++++++++++++---------------
> 1 file changed, 294 insertions(+), 268 deletions(-)
>
>diff --git a/source3/modules/vfs_glusterfs.c b/source3/modules/vfs_glusterfs.c
>index 16f8d004294..f07ad233934 100644
>--- a/source3/modules/vfs_glusterfs.c
>+++ b/source3/modules/vfs_glusterfs.c
>@@ -45,14 +45,11 @@
> #include "lib/util/sys_rw.h"
> #include "smbprofile.h"
> #include "modules/posixacl_xattr.h"
>+#include "lib/pthreadpool/pthreadpool_tevent.h"
> 
> #define DEFAULT_VOLFILE_SERVER "localhost"
> #define GLUSTER_NAME_MAX 255
> 
>-static int read_fd = -1;
>-static int write_fd = -1;
>-static struct tevent_fd *aio_read_event = NULL;
>-
> /**
>  * Helper to convert struct stat to struct stat_ex.
>  */
>@@ -700,326 +697,283 @@ static ssize_t vfs_gluster_pread(struct vfs_handle_struct *handle,
> 	return ret;
> }
> 
>-struct glusterfs_aio_state;
>-
>-struct glusterfs_aio_wrapper {
>-	struct glusterfs_aio_state *state;
>-};
>-
>-struct glusterfs_aio_state {
>+struct vfs_gluster_pread_state {
> 	ssize_t ret;
>-	struct tevent_req *req;
>-	bool cancelled;
>+	glfs_fd_t *fd;
>+	void *buf;
>+	size_t count;
>+	off_t offset;
>+
> 	struct vfs_aio_state vfs_aio_state;
>-	struct timespec start;
> 	SMBPROFILE_BYTES_ASYNC_STATE(profile_bytes);
> };
> 
>-static int aio_wrapper_destructor(struct glusterfs_aio_wrapper *wrap)
>-{
>-	if (wrap->state != NULL) {
>-		wrap->state->cancelled = true;
>-	}
>-
>-	return 0;
>-}
>+static void vfs_gluster_pread_do(void *private_data);
>+static void vfs_gluster_pread_done(struct tevent_req *subreq);
>+static int vfs_gluster_pread_state_destructor(struct vfs_gluster_pread_state *state);
> 
>-/*
>- * This function is the callback that will be called on glusterfs
>- * threads once the async IO submitted is complete. To notify
>- * Samba of the completion we use a pipe based queue.
>- */
>-#ifdef HAVE_GFAPI_VER_7_6
>-static void aio_glusterfs_done(glfs_fd_t *fd, ssize_t ret,
>-			       struct glfs_stat *prestat,
>-			       struct glfs_stat *poststat,
>-			       void *data)
>-#else
>-static void aio_glusterfs_done(glfs_fd_t *fd, ssize_t ret, void *data)
>-#endif
>+static struct tevent_req *vfs_gluster_pread_send(struct vfs_handle_struct
>+						  *handle, TALLOC_CTX *mem_ctx,
>+						  struct tevent_context *ev,
>+						  files_struct *fsp,
>+						  void *data, size_t n,
>+						  off_t offset)
> {
>-	struct glusterfs_aio_state *state = NULL;
>-	int sts = 0;
>-	struct timespec end;
>-
>-	state = (struct glusterfs_aio_state *)data;
>+	struct vfs_gluster_pread_state *state;
>+	struct tevent_req *req, *subreq;
> 
>-	PROFILE_TIMESTAMP(&end);
>+	glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
>+	if (glfd == NULL) {
>+		DBG_ERR("Failed to fetch gluster fd\n");
>+		return NULL;
>+	}
> 
>-	if (ret < 0) {
>-		state->ret = -1;
>-		state->vfs_aio_state.error = errno;
>-	} else {
>-		state->ret = ret;
>+	req = tevent_req_create(mem_ctx, &state, struct vfs_gluster_pread_state);
>+	if (req == NULL) {
>+		return NULL;
> 	}
>-	state->vfs_aio_state.duration = nsec_time_diff(&end, &state->start);
> 
>-	SMBPROFILE_BYTES_ASYNC_END(state->profile_bytes);
>+	state->ret = -1;
>+	state->fd = glfd;
>+	state->buf = data;
>+	state->count = n;
>+	state->offset = offset;
> 
>-	/*
>-	 * Write the state pointer to glusterfs_aio_state to the
>-	 * pipe, so we can call tevent_req_done() from the main thread,
>-	 * because tevent_req_done() is not designed to be executed in
>-	 * the multithread environment, so tevent_req_done() must be
>-	 * executed from the smbd main thread.
>-	 *
>-	 * write(2) on pipes with sizes under _POSIX_PIPE_BUF
>-	 * in size is atomic, without this, the use op pipes in this
>-	 * code would not work.
>-	 *
>-	 * sys_write is a thin enough wrapper around write(2)
>-	 * that we can trust it here.
>-	 */
>+	SMBPROFILE_BYTES_ASYNC_START(syscall_asys_pread, profile_p,
>+				     state->profile_bytes, n);
>+	SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
> 
>-	sts = sys_write(write_fd, &state, sizeof(struct glusterfs_aio_state *));
>-	if (sts < 0) {
>-		DEBUG(0,("\nWrite to pipe failed (%s)", strerror(errno)));
>+	subreq = pthreadpool_tevent_job_send(
>+		state, ev, handle->conn->sconn->pool,
>+		vfs_gluster_pread_do, state);
>+	if (tevent_req_nomem(subreq, req)) {
>+		return tevent_req_post(req, ev);
> 	}
>+	tevent_req_set_callback(subreq, vfs_gluster_pread_done, req);
>+
>+	talloc_set_destructor(state, vfs_gluster_pread_state_destructor);
> 
>-	return;
>+	return req;
> }
> 
>-/*
>- * Read each req off the pipe and process it.
>- */
>-static void aio_tevent_fd_done(struct tevent_context *event_ctx,
>-				struct tevent_fd *fde,
>-				uint16_t flags, void *data)
>+static void vfs_gluster_pread_do(void *private_data)
> {
>-	struct tevent_req *req = NULL;
>-	struct glusterfs_aio_state *state = NULL;
>-	int sts = 0;
>+	struct vfs_gluster_pread_state *state = talloc_get_type_abort(
>+		private_data, struct vfs_gluster_pread_state);
>+	struct timespec start_time;
>+	struct timespec end_time;
> 
>-	/*
>-	 * read(2) on pipes is atomic if the needed data is available
>-	 * in the pipe, per SUS and POSIX.  Because we always write
>-	 * to the pipe in sizeof(struct tevent_req *) chunks, we can
>-	 * always read in those chunks, atomically.
>-	 *
>-	 * sys_read is a thin enough wrapper around read(2) that we
>-	 * can trust it here.
>-	 */
>+	SMBPROFILE_BYTES_ASYNC_SET_BUSY(state->profile_bytes);
> 
>-	sts = sys_read(read_fd, &state, sizeof(struct glusterfs_aio_state *));
>+	PROFILE_TIMESTAMP(&start_time);
> 
>-	if (sts < 0) {
>-		DEBUG(0,("\nRead from pipe failed (%s)", strerror(errno)));
>-	}
>+	do {
>+#ifdef HAVE_GFAPI_VER_7_6
>+		state->ret = glfs_pread(state->fd, state->buf, state->count,
>+					state->offset, 0, NULL);
>+#else
>+		state->ret = glfs_pread(state->fd, state->buf, state->count,
>+					state->offset, 0);
>+#endif
>+	} while ((state->ret == -1) && (errno == EINTR));
> 
>-	/* if we've cancelled the op, there is no req, so just clean up. */
>-	if (state->cancelled == true) {
>-		TALLOC_FREE(state);
>-		return;
>+	if (state->ret == -1) {
>+		state->vfs_aio_state.error = errno;
> 	}
> 
>-	req = state->req;
>+	PROFILE_TIMESTAMP(&end_time);
> 
>-	if (req) {
>-		tevent_req_done(req);
>-	}
>-	return;
>+	state->vfs_aio_state.duration = nsec_time_diff(&end_time, &start_time);
>+
>+	SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
> }
> 
>-static bool init_gluster_aio(struct vfs_handle_struct *handle)
>+static int vfs_gluster_pread_state_destructor(struct vfs_gluster_pread_state *state)
> {
>-	int fds[2];
>-	int ret = -1;
>+	return -1;
>+}
> 
>-	if (read_fd != -1) {
>+static void vfs_gluster_pread_done(struct tevent_req *subreq)
>+{
>+	struct tevent_req *req = tevent_req_callback_data(
>+		subreq, struct tevent_req);
>+	struct vfs_gluster_pread_state *state = tevent_req_data(
>+		req, struct vfs_gluster_pread_state);
>+	int ret;
>+
>+	ret = pthreadpool_tevent_job_recv(subreq);
>+	TALLOC_FREE(subreq);
>+	SMBPROFILE_BYTES_ASYNC_END(state->profile_bytes);
>+	talloc_set_destructor(state, NULL);
>+	if (ret != 0) {
>+		if (ret != EAGAIN) {
>+			tevent_req_error(req, ret);
>+			return;
>+		}
> 		/*
>-		 * Already initialized.
>+		 * If we get EAGAIN from pthreadpool_tevent_job_recv() this
>+		 * means the lower level pthreadpool failed to create a new
>+		 * thread. Fallback to sync processing in that case to allow
>+		 * some progress for the client.
> 		 */
>-		return true;
>-	}
>-
>-	ret = pipe(fds);
>-	if (ret == -1) {
>-		goto fail;
>-	}
>-
>-	read_fd = fds[0];
>-	write_fd = fds[1];
>-
>-	aio_read_event = tevent_add_fd(handle->conn->sconn->ev_ctx,
>-					NULL,
>-					read_fd,
>-					TEVENT_FD_READ,
>-					aio_tevent_fd_done,
>-					NULL);
>-	if (aio_read_event == NULL) {
>-		goto fail;
>+		vfs_gluster_pread_do(state);
> 	}
> 
>-	return true;
>-fail:
>-	TALLOC_FREE(aio_read_event);
>-	if (read_fd != -1) {
>-		close(read_fd);
>-		close(write_fd);
>-		read_fd = -1;
>-		write_fd = -1;
>-	}
>-	return false;
>+	tevent_req_done(req);
> }
> 
>-static struct glusterfs_aio_state *aio_state_create(TALLOC_CTX *mem_ctx)
>+static ssize_t vfs_gluster_pread_recv(struct tevent_req *req,
>+				      struct vfs_aio_state *vfs_aio_state)
> {
>-	struct tevent_req *req = NULL;
>-	struct glusterfs_aio_state *state = NULL;
>-	struct glusterfs_aio_wrapper *wrapper = NULL;
>+	struct vfs_gluster_pread_state *state = tevent_req_data(
>+		req, struct vfs_gluster_pread_state);
> 
>-	req = tevent_req_create(mem_ctx, &wrapper, struct glusterfs_aio_wrapper);
>-
>-	if (req == NULL) {
>-		return NULL;
>+	if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
>+		return -1;
> 	}
> 
>-	state = talloc_zero(NULL, struct glusterfs_aio_state);
>-
>-	if (state == NULL) {
>-		TALLOC_FREE(req);
>-		return NULL;
>-	}
>+	*vfs_aio_state = state->vfs_aio_state;
>+	return state->ret;
>+}
> 
>-	talloc_set_destructor(wrapper, aio_wrapper_destructor);
>-	state->cancelled = false;
>-	state->req = req;
>+struct vfs_gluster_pwrite_state {
>+	ssize_t ret;
>+	glfs_fd_t *fd;
>+	const void *buf;
>+	size_t count;
>+	off_t offset;
> 
>-	wrapper->state = state;
>+	struct vfs_aio_state vfs_aio_state;
>+	SMBPROFILE_BYTES_ASYNC_STATE(profile_bytes);
>+};
> 
>-	return state;
>-}
>+static void vfs_gluster_pwrite_do(void *private_data);
>+static void vfs_gluster_pwrite_done(struct tevent_req *subreq);
>+static int vfs_gluster_pwrite_state_destructor(struct vfs_gluster_pwrite_state *state);
> 
>-static struct tevent_req *vfs_gluster_pread_send(struct vfs_handle_struct
>+static struct tevent_req *vfs_gluster_pwrite_send(struct vfs_handle_struct
> 						  *handle, TALLOC_CTX *mem_ctx,
> 						  struct tevent_context *ev,
> 						  files_struct *fsp,
>-						  void *data, size_t n,
>+						  const void *data, size_t n,
> 						  off_t offset)
> {
>-	struct glusterfs_aio_state *state = NULL;
>-	struct tevent_req *req = NULL;
>-	int ret = 0;
>-	glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
>+	struct tevent_req *req, *subreq;
>+	struct vfs_gluster_pwrite_state *state;
> 
>+	glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
> 	if (glfd == NULL) {
> 		DBG_ERR("Failed to fetch gluster fd\n");
> 		return NULL;
> 	}
> 
>-	state = aio_state_create(mem_ctx);
>-
>-	if (state == NULL) {
>+	req = tevent_req_create(mem_ctx, &state, struct vfs_gluster_pwrite_state);
>+	if (req == NULL) {
> 		return NULL;
> 	}
> 
>-	req = state->req;
>+	state->ret = -1;
>+	state->fd = glfd;
>+	state->buf = data;
>+	state->count = n;
>+	state->offset = offset;
> 
>-	if (!init_gluster_aio(handle)) {
>-		tevent_req_error(req, EIO);
>-		return tevent_req_post(req, ev);
>-	}
>-
>-	/*
>-	 * aio_glusterfs_done and aio_tevent_fd_done()
>-	 * use the raw tevent context. We need to use
>-	 * tevent_req_defer_callback() in order to
>-	 * use the event context we're started with.
>-	 */
>-	tevent_req_defer_callback(req, ev);
>-
>-	SMBPROFILE_BYTES_ASYNC_START(syscall_asys_pread, profile_p,
>+	SMBPROFILE_BYTES_ASYNC_START(syscall_asys_pwrite, profile_p,
> 				     state->profile_bytes, n);
>-	PROFILE_TIMESTAMP(&state->start);
>-	ret = glfs_pread_async(glfd, data, n, offset, 0, aio_glusterfs_done,
>-				state);
>-	if (ret < 0) {
>-		tevent_req_error(req, -ret);
>+	SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
>+
>+	subreq = pthreadpool_tevent_job_send(
>+		state, ev, handle->conn->sconn->pool,
>+		vfs_gluster_pwrite_do, state);
>+	if (tevent_req_nomem(subreq, req)) {
> 		return tevent_req_post(req, ev);
> 	}
>+	tevent_req_set_callback(subreq, vfs_gluster_pwrite_done, req);
>+
>+	talloc_set_destructor(state, vfs_gluster_pwrite_state_destructor);
> 
> 	return req;
> }
> 
>-static struct tevent_req *vfs_gluster_pwrite_send(struct vfs_handle_struct
>-						  *handle, TALLOC_CTX *mem_ctx,
>-						  struct tevent_context *ev,
>-						  files_struct *fsp,
>-						  const void *data, size_t n,
>-						  off_t offset)
>+static void vfs_gluster_pwrite_do(void *private_data)
> {
>-	struct glusterfs_aio_state *state = NULL;
>-	struct tevent_req *req = NULL;
>-	int ret = 0;
>-	glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
>-
>-	if (glfd == NULL) {
>-		DBG_ERR("Failed to fetch gluster fd\n");
>-		return NULL;
>-	}
>+	struct vfs_gluster_pwrite_state *state = talloc_get_type_abort(
>+		private_data, struct vfs_gluster_pwrite_state);
>+	struct timespec start_time;
>+	struct timespec end_time;
> 
>-	state = aio_state_create(mem_ctx);
>+	SMBPROFILE_BYTES_ASYNC_SET_BUSY(state->profile_bytes);
> 
>-	if (state == NULL) {
>-		return NULL;
>-	}
>+	PROFILE_TIMESTAMP(&start_time);
> 
>-	req = state->req;
>+	do {
>+#ifdef HAVE_GFAPI_VER_7_6
>+		state->ret = glfs_pwrite(state->fd, state->buf, state->count,
>+					 state->offset, 0, NULL, NULL);
>+#else
>+		state->ret = glfs_pwrite(state->fd, state->buf, state->count,
>+					 state->offset, 0);
>+#endif
>+	} while ((state->ret == -1) && (errno == EINTR));
> 
>-	if (!init_gluster_aio(handle)) {
>-		tevent_req_error(req, EIO);
>-		return tevent_req_post(req, ev);
>+	if (state->ret == -1) {
>+		state->vfs_aio_state.error = errno;
> 	}
> 
>-	/*
>-	 * aio_glusterfs_done and aio_tevent_fd_done()
>-	 * use the raw tevent context. We need to use
>-	 * tevent_req_defer_callback() in order to
>-	 * use the event context we're started with.
>-	 */
>-	tevent_req_defer_callback(req, ev);
>+	PROFILE_TIMESTAMP(&end_time);
> 
>-	SMBPROFILE_BYTES_ASYNC_START(syscall_asys_pwrite, profile_p,
>-				     state->profile_bytes, n);
>-	PROFILE_TIMESTAMP(&state->start);
>-	ret = glfs_pwrite_async(glfd, data, n, offset, 0, aio_glusterfs_done,
>-				state);
>-	if (ret < 0) {
>-		tevent_req_error(req, -ret);
>-		return tevent_req_post(req, ev);
>-	}
>+	state->vfs_aio_state.duration = nsec_time_diff(&end_time, &start_time);
> 
>-	return req;
>+	SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
> }
> 
>-static ssize_t vfs_gluster_recv(struct tevent_req *req,
>-				struct vfs_aio_state *vfs_aio_state)
>+static int vfs_gluster_pwrite_state_destructor(struct vfs_gluster_pwrite_state *state)
> {
>-	struct glusterfs_aio_wrapper *wrapper = NULL;
>-	int ret = 0;
>+	return -1;
>+}
> 
>-	wrapper = tevent_req_data(req, struct glusterfs_aio_wrapper);
>+static void vfs_gluster_pwrite_done(struct tevent_req *subreq)
>+{
>+	struct tevent_req *req = tevent_req_callback_data(
>+		subreq, struct tevent_req);
>+	struct vfs_gluster_pwrite_state *state = tevent_req_data(
>+		req, struct vfs_gluster_pwrite_state);
>+	int ret;
> 
>-	if (wrapper == NULL) {
>-		return -1;
>+	ret = pthreadpool_tevent_job_recv(subreq);
>+	TALLOC_FREE(subreq);
>+	SMBPROFILE_BYTES_ASYNC_END(state->profile_bytes);
>+	talloc_set_destructor(state, NULL);
>+	if (ret != 0) {
>+		if (ret != EAGAIN) {
>+			tevent_req_error(req, ret);
>+			return;
>+		}
>+		/*
>+		 * If we get EAGAIN from pthreadpool_tevent_job_recv() this
>+		 * means the lower level pthreadpool failed to create a new
>+		 * thread. Fallback to sync processing in that case to allow
>+		 * some progress for the client.
>+		 */
>+		vfs_gluster_pwrite_do(state);
> 	}
> 
>-	if (wrapper->state == NULL) {
>-		return -1;
>-	}
>+	tevent_req_done(req);
>+}
>+
>+static ssize_t vfs_gluster_pwrite_recv(struct tevent_req *req,
>+				       struct vfs_aio_state *vfs_aio_state)
>+{
>+	struct vfs_gluster_pwrite_state *state = tevent_req_data(
>+		req, struct vfs_gluster_pwrite_state);
> 
> 	if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
> 		return -1;
> 	}
> 
>-	*vfs_aio_state = wrapper->state->vfs_aio_state;
>-	ret = wrapper->state->ret;
>+	*vfs_aio_state = state->vfs_aio_state;
> 
>-	/* Clean up the state, it is in a NULL context. */
>-
>-	TALLOC_FREE(wrapper->state);
>-
>-	return ret;
>+	return state->ret;
> }
> 
> static ssize_t vfs_gluster_pwrite(struct vfs_handle_struct *handle,
>@@ -1100,60 +1054,132 @@ static int vfs_gluster_rename(struct vfs_handle_struct *handle,
> 	return ret;
> }
> 
>+struct vfs_gluster_fsync_state {
>+	ssize_t ret;
>+	glfs_fd_t *fd;
>+
>+	struct vfs_aio_state vfs_aio_state;
>+	SMBPROFILE_BYTES_ASYNC_STATE(profile_bytes);
>+};
>+
>+static void vfs_gluster_fsync_do(void *private_data);
>+static void vfs_gluster_fsync_done(struct tevent_req *subreq);
>+static int vfs_gluster_fsync_state_destructor(struct vfs_gluster_fsync_state *state);
>+
> static struct tevent_req *vfs_gluster_fsync_send(struct vfs_handle_struct
> 						 *handle, TALLOC_CTX *mem_ctx,
> 						 struct tevent_context *ev,
> 						 files_struct *fsp)
> {
>-	struct tevent_req *req = NULL;
>-	struct glusterfs_aio_state *state = NULL;
>-	int ret = 0;
>-	glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
>+	struct tevent_req *req, *subreq;
>+	struct vfs_gluster_fsync_state *state;
> 
>+	glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
> 	if (glfd == NULL) {
> 		DBG_ERR("Failed to fetch gluster fd\n");
> 		return NULL;
> 	}
> 
>-	state = aio_state_create(mem_ctx);
>-
>-	if (state == NULL) {
>+	req = tevent_req_create(mem_ctx, &state, struct vfs_gluster_fsync_state);
>+	if (req == NULL) {
> 		return NULL;
> 	}
> 
>-	req = state->req;
>+	state->ret = -1;
>+	state->fd = glfd;
> 
>-	if (!init_gluster_aio(handle)) {
>-		tevent_req_error(req, EIO);
>+	SMBPROFILE_BYTES_ASYNC_START(syscall_asys_fsync, profile_p,
>+                                     state->profile_bytes, 0);
>+	SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
>+
>+	subreq = pthreadpool_tevent_job_send(
>+		state, ev, handle->conn->sconn->pool, vfs_gluster_fsync_do, state);
>+	if (tevent_req_nomem(subreq, req)) {
> 		return tevent_req_post(req, ev);
> 	}
>+	tevent_req_set_callback(subreq, vfs_gluster_fsync_done, req);
> 
>-	/*
>-	 * aio_glusterfs_done and aio_tevent_fd_done()
>-	 * use the raw tevent context. We need to use
>-	 * tevent_req_defer_callback() in order to
>-	 * use the event context we're started with.
>-	 */
>-	tevent_req_defer_callback(req, ev);
>+	talloc_set_destructor(state, vfs_gluster_fsync_state_destructor);
> 
>-	SMBPROFILE_BYTES_ASYNC_START(syscall_asys_fsync, profile_p,
>-				     state->profile_bytes, 0);
>-	PROFILE_TIMESTAMP(&state->start);
>-	ret = glfs_fsync_async(glfd, aio_glusterfs_done, state);
>-	if (ret < 0) {
>-		tevent_req_error(req, -ret);
>-		return tevent_req_post(req, ev);
>-	}
> 	return req;
> }
> 
>+static void vfs_gluster_fsync_do(void *private_data)
>+{
>+	struct vfs_gluster_fsync_state *state = talloc_get_type_abort(
>+		private_data, struct vfs_gluster_fsync_state);
>+	struct timespec start_time;
>+	struct timespec end_time;
>+
>+	SMBPROFILE_BYTES_ASYNC_SET_BUSY(state->profile_bytes);
>+
>+	PROFILE_TIMESTAMP(&start_time);
>+
>+	do {
>+#ifdef HAVE_GFAPI_VER_7_6
>+		state->ret = glfs_fsync(state->fd, NULL, NULL);
>+#else
>+		state->ret = glfs_fsync(state->fd);
>+#endif
>+	} while ((state->ret == -1) && (errno == EINTR));
>+
>+	if (state->ret == -1) {
>+		state->vfs_aio_state.error = errno;
>+	}
>+
>+	PROFILE_TIMESTAMP(&end_time);
>+
>+	state->vfs_aio_state.duration = nsec_time_diff(&end_time, &start_time);
>+
>+	SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
>+}
>+
>+static int vfs_gluster_fsync_state_destructor(struct vfs_gluster_fsync_state *state)
>+{
>+	return -1;
>+}
>+
>+static void vfs_gluster_fsync_done(struct tevent_req *subreq)
>+{
>+	struct tevent_req *req = tevent_req_callback_data(
>+		subreq, struct tevent_req);
>+	struct vfs_gluster_fsync_state *state = tevent_req_data(
>+		req, struct vfs_gluster_fsync_state);
>+	int ret;
>+
>+	ret = pthreadpool_tevent_job_recv(subreq);
>+	TALLOC_FREE(subreq);
>+	SMBPROFILE_BYTES_ASYNC_END(state->profile_bytes);
>+	talloc_set_destructor(state, NULL);
>+	if (ret != 0) {
>+		if (ret != EAGAIN) {
>+			tevent_req_error(req, ret);
>+			return;
>+		}
>+		/*
>+		 * If we get EAGAIN from pthreadpool_tevent_job_recv() this
>+		 * means the lower level pthreadpool failed to create a new
>+		 * thread. Fallback to sync processing in that case to allow
>+		 * some progress for the client.
>+		 */
>+		vfs_gluster_fsync_do(state);
>+	}
>+
>+	tevent_req_done(req);
>+}
>+
> static int vfs_gluster_fsync_recv(struct tevent_req *req,
> 				  struct vfs_aio_state *vfs_aio_state)
> {
>-	/*
>-	 * Use implicit conversion ssize_t->int
>-	 */
>-	return vfs_gluster_recv(req, vfs_aio_state);
>+	struct vfs_gluster_fsync_state *state = tevent_req_data(
>+		req, struct vfs_gluster_fsync_state);
>+
>+	if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
>+		return -1;
>+	}
>+
>+	*vfs_aio_state = state->vfs_aio_state;
>+	return state->ret;
> }
> 
> static int vfs_gluster_stat(struct vfs_handle_struct *handle,
>@@ -1849,10 +1875,10 @@ static struct vfs_fn_pointers glusterfs_fns = {
> 	.close_fn = vfs_gluster_close,
> 	.pread_fn = vfs_gluster_pread,
> 	.pread_send_fn = vfs_gluster_pread_send,
>-	.pread_recv_fn = vfs_gluster_recv,
>+	.pread_recv_fn = vfs_gluster_pread_recv,
> 	.pwrite_fn = vfs_gluster_pwrite,
> 	.pwrite_send_fn = vfs_gluster_pwrite_send,
>-	.pwrite_recv_fn = vfs_gluster_recv,
>+	.pwrite_recv_fn = vfs_gluster_pwrite_recv,
> 	.lseek_fn = vfs_gluster_lseek,
> 	.sendfile_fn = vfs_gluster_sendfile,
> 	.recvfile_fn = vfs_gluster_recvfile,
>-- 
>2.21.0
>

Flags:

gd: review+
jra: review+

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Attachments on bug 14098: 15421 | 15432 | 15433 | 15434