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glusterfs/SOURCES/0465-posix-Implement-a-jani...

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From 143b93b230b429cc712353243ed794b68494c040 Mon Sep 17 00:00:00 2001
From: Mohit Agrawal <moagrawa@redhat.com>
Date: Mon, 27 Jul 2020 18:08:00 +0530
Subject: [PATCH 465/465] posix: Implement a janitor thread to close fd
Problem: In the commit fb20713b380e1df8d7f9e9df96563be2f9144fd6 we use
syntask to close fd but we have found the patch is reducing the
performance
Solution: Use janitor thread to close fd's and save the pfd ctx into
ctx janitor list and also save the posix_xlator into pfd object to
avoid the race condition during cleanup in brick_mux environment
> Change-Id: Ifb3d18a854b267333a3a9e39845bfefb83fbc092
> Fixes: #1396
> Signed-off-by: Mohit Agrawal <moagrawa@redhat.com>
> (Reviewed on upstream link https://review.gluster.org/#/c/glusterfs/+/24755/)
> (Cherry pick from commit 41b9616435cbdf671805856e487e373060c9455b
Change-Id: Ifb3d18a854b267333a3a9e39845bfefb83fbc092
BUG: 1851989
Signed-off-by: Mohit Agrawal <moagrawa@redhat.com>
Reviewed-on: https://code.engineering.redhat.com/gerrit/209448
Tested-by: RHGS Build Bot <nigelb@redhat.com>
Reviewed-by: Sunil Kumar Heggodu Gopala Acharya <sheggodu@redhat.com>
---
glusterfsd/src/glusterfsd.c | 4 ++
libglusterfs/src/glusterfs/glusterfs.h | 7 ++
rpc/rpc-lib/src/rpcsvc.c | 6 --
xlators/storage/posix/src/posix-common.c | 34 +++++++++-
xlators/storage/posix/src/posix-helpers.c | 93 ++++++++++++++++++++++++++
xlators/storage/posix/src/posix-inode-fd-ops.c | 33 ++++-----
xlators/storage/posix/src/posix.h | 7 ++
7 files changed, 161 insertions(+), 23 deletions(-)
diff --git a/glusterfsd/src/glusterfsd.c b/glusterfsd/src/glusterfsd.c
index 9821180..955bf1d 100644
--- a/glusterfsd/src/glusterfsd.c
+++ b/glusterfsd/src/glusterfsd.c
@@ -1839,6 +1839,10 @@ glusterfs_ctx_defaults_init(glusterfs_ctx_t *ctx)
INIT_LIST_HEAD(&cmd_args->xlator_options);
INIT_LIST_HEAD(&cmd_args->volfile_servers);
+ ctx->pxl_count = 0;
+ pthread_mutex_init(&ctx->fd_lock, NULL);
+ pthread_cond_init(&ctx->fd_cond, NULL);
+ INIT_LIST_HEAD(&ctx->janitor_fds);
lim.rlim_cur = RLIM_INFINITY;
lim.rlim_max = RLIM_INFINITY;
diff --git a/libglusterfs/src/glusterfs/glusterfs.h b/libglusterfs/src/glusterfs/glusterfs.h
index 495a4d7..bf6a987 100644
--- a/libglusterfs/src/glusterfs/glusterfs.h
+++ b/libglusterfs/src/glusterfs/glusterfs.h
@@ -733,6 +733,13 @@ struct _glusterfs_ctx {
} stats;
struct list_head volfile_list;
+ /* Add members to manage janitor threads for cleanup fd */
+ struct list_head janitor_fds;
+ pthread_cond_t fd_cond;
+ pthread_mutex_t fd_lock;
+ pthread_t janitor;
+ /* The variable is use to save total posix xlator count */
+ uint32_t pxl_count;
char volume_id[GF_UUID_BUF_SIZE]; /* Used only in protocol/client */
};
diff --git a/rpc/rpc-lib/src/rpcsvc.c b/rpc/rpc-lib/src/rpcsvc.c
index 23ca1fd..3f184bf 100644
--- a/rpc/rpc-lib/src/rpcsvc.c
+++ b/rpc/rpc-lib/src/rpcsvc.c
@@ -375,12 +375,6 @@ rpcsvc_program_actor(rpcsvc_request_t *req)
req->ownthread = program->ownthread;
req->synctask = program->synctask;
- if (((req->procnum == GFS3_OP_RELEASE) ||
- (req->procnum == GFS3_OP_RELEASEDIR)) &&
- (program->prognum == GLUSTER_FOP_PROGRAM)) {
- req->ownthread = _gf_false;
- req->synctask = _gf_true;
- }
err = SUCCESS;
gf_log(GF_RPCSVC, GF_LOG_TRACE, "Actor found: %s - %s for %s",
diff --git a/xlators/storage/posix/src/posix-common.c b/xlators/storage/posix/src/posix-common.c
index b317627..c5a43a1 100644
--- a/xlators/storage/posix/src/posix-common.c
+++ b/xlators/storage/posix/src/posix-common.c
@@ -150,6 +150,7 @@ posix_notify(xlator_t *this, int32_t event, void *data, ...)
struct timespec sleep_till = {
0,
};
+ glusterfs_ctx_t *ctx = this->ctx;
switch (event) {
case GF_EVENT_PARENT_UP: {
@@ -160,8 +161,6 @@ posix_notify(xlator_t *this, int32_t event, void *data, ...)
case GF_EVENT_PARENT_DOWN: {
if (!victim->cleanup_starting)
break;
- gf_log(this->name, GF_LOG_INFO, "Sending CHILD_DOWN for brick %s",
- victim->name);
if (priv->janitor) {
pthread_mutex_lock(&priv->janitor_mutex);
@@ -187,6 +186,16 @@ posix_notify(xlator_t *this, int32_t event, void *data, ...)
GF_FREE(priv->janitor);
}
priv->janitor = NULL;
+ pthread_mutex_lock(&ctx->fd_lock);
+ {
+ while (priv->rel_fdcount > 0) {
+ pthread_cond_wait(&priv->fd_cond, &ctx->fd_lock);
+ }
+ }
+ pthread_mutex_unlock(&ctx->fd_lock);
+
+ gf_log(this->name, GF_LOG_INFO, "Sending CHILD_DOWN for brick %s",
+ victim->name);
default_notify(this->parents->xlator, GF_EVENT_CHILD_DOWN, data);
} break;
default:
@@ -1038,7 +1047,13 @@ posix_init(xlator_t *this)
pthread_cond_init(&_private->fsync_cond, NULL);
pthread_mutex_init(&_private->janitor_mutex, NULL);
pthread_cond_init(&_private->janitor_cond, NULL);
+ pthread_cond_init(&_private->fd_cond, NULL);
INIT_LIST_HEAD(&_private->fsyncs);
+ _private->rel_fdcount = 0;
+ ret = posix_spawn_ctx_janitor_thread(this);
+ if (ret)
+ goto out;
+
ret = gf_thread_create(&_private->fsyncer, NULL, posix_fsyncer, this,
"posixfsy");
if (ret) {
@@ -1133,6 +1148,8 @@ posix_fini(xlator_t *this)
{
struct posix_private *priv = this->private;
gf_boolean_t health_check = _gf_false;
+ glusterfs_ctx_t *ctx = this->ctx;
+ uint32_t count;
int ret = 0;
if (!priv)
@@ -1166,6 +1183,19 @@ posix_fini(xlator_t *this)
priv->janitor = NULL;
}
+ pthread_mutex_lock(&ctx->fd_lock);
+ {
+ count = --ctx->pxl_count;
+ if (count == 0) {
+ pthread_cond_signal(&ctx->fd_cond);
+ }
+ }
+ pthread_mutex_unlock(&ctx->fd_lock);
+
+ if (count == 0) {
+ pthread_join(ctx->janitor, NULL);
+ }
+
if (priv->fsyncer) {
(void)gf_thread_cleanup_xint(priv->fsyncer);
priv->fsyncer = 0;
diff --git a/xlators/storage/posix/src/posix-helpers.c b/xlators/storage/posix/src/posix-helpers.c
index 39dbcce..73a44be 100644
--- a/xlators/storage/posix/src/posix-helpers.c
+++ b/xlators/storage/posix/src/posix-helpers.c
@@ -1582,6 +1582,99 @@ unlock:
return;
}
+static struct posix_fd *
+janitor_get_next_fd(glusterfs_ctx_t *ctx)
+{
+ struct posix_fd *pfd = NULL;
+
+ while (list_empty(&ctx->janitor_fds)) {
+ if (ctx->pxl_count == 0) {
+ return NULL;
+ }
+
+ pthread_cond_wait(&ctx->fd_cond, &ctx->fd_lock);
+ }
+
+ pfd = list_first_entry(&ctx->janitor_fds, struct posix_fd, list);
+ list_del_init(&pfd->list);
+
+ return pfd;
+}
+
+static void
+posix_close_pfd(xlator_t *xl, struct posix_fd *pfd)
+{
+ THIS = xl;
+
+ if (pfd->dir == NULL) {
+ gf_msg_trace(xl->name, 0, "janitor: closing file fd=%d", pfd->fd);
+ sys_close(pfd->fd);
+ } else {
+ gf_msg_debug(xl->name, 0, "janitor: closing dir fd=%p", pfd->dir);
+ sys_closedir(pfd->dir);
+ }
+
+ GF_FREE(pfd);
+}
+
+static void *
+posix_ctx_janitor_thread_proc(void *data)
+{
+ xlator_t *xl;
+ struct posix_fd *pfd;
+ glusterfs_ctx_t *ctx = NULL;
+ struct posix_private *priv_fd;
+
+ ctx = data;
+
+ pthread_mutex_lock(&ctx->fd_lock);
+
+ while ((pfd = janitor_get_next_fd(ctx)) != NULL) {
+ pthread_mutex_unlock(&ctx->fd_lock);
+
+ xl = pfd->xl;
+ posix_close_pfd(xl, pfd);
+
+ pthread_mutex_lock(&ctx->fd_lock);
+
+ priv_fd = xl->private;
+ priv_fd->rel_fdcount--;
+ if (!priv_fd->rel_fdcount)
+ pthread_cond_signal(&priv_fd->fd_cond);
+ }
+
+ pthread_mutex_unlock(&ctx->fd_lock);
+
+ return NULL;
+}
+
+int
+posix_spawn_ctx_janitor_thread(xlator_t *this)
+{
+ int ret = 0;
+ glusterfs_ctx_t *ctx = NULL;
+
+ ctx = this->ctx;
+
+ pthread_mutex_lock(&ctx->fd_lock);
+ {
+ if (ctx->pxl_count++ == 0) {
+ ret = gf_thread_create(&ctx->janitor, NULL,
+ posix_ctx_janitor_thread_proc, ctx,
+ "posixctxjan");
+
+ if (ret) {
+ gf_msg(this->name, GF_LOG_ERROR, errno, P_MSG_THREAD_FAILED,
+ "spawning janitor thread failed");
+ ctx->pxl_count--;
+ }
+ }
+ }
+ pthread_mutex_unlock(&ctx->fd_lock);
+
+ return ret;
+}
+
static int
is_fresh_file(int64_t ctime_sec)
{
diff --git a/xlators/storage/posix/src/posix-inode-fd-ops.c b/xlators/storage/posix/src/posix-inode-fd-ops.c
index 81f4a6b..21119ea 100644
--- a/xlators/storage/posix/src/posix-inode-fd-ops.c
+++ b/xlators/storage/posix/src/posix-inode-fd-ops.c
@@ -1352,6 +1352,22 @@ out:
return 0;
}
+static void
+posix_add_fd_to_cleanup(xlator_t *this, struct posix_fd *pfd)
+{
+ glusterfs_ctx_t *ctx = this->ctx;
+ struct posix_private *priv = this->private;
+
+ pfd->xl = this;
+ pthread_mutex_lock(&ctx->fd_lock);
+ {
+ list_add_tail(&pfd->list, &ctx->janitor_fds);
+ priv->rel_fdcount++;
+ pthread_cond_signal(&ctx->fd_cond);
+ }
+ pthread_mutex_unlock(&ctx->fd_lock);
+}
+
int32_t
posix_releasedir(xlator_t *this, fd_t *fd)
{
@@ -1374,11 +1390,7 @@ posix_releasedir(xlator_t *this, fd_t *fd)
"pfd->dir is NULL for fd=%p", fd);
goto out;
}
-
- gf_msg_debug(this->name, 0, "janitor: closing dir fd=%p", pfd->dir);
-
- sys_closedir(pfd->dir);
- GF_FREE(pfd);
+ posix_add_fd_to_cleanup(this, pfd);
out:
return 0;
@@ -2494,7 +2506,6 @@ out:
int32_t
posix_release(xlator_t *this, fd_t *fd)
{
- struct posix_private *priv = NULL;
struct posix_fd *pfd = NULL;
int ret = -1;
uint64_t tmp_pfd = 0;
@@ -2502,8 +2513,6 @@ posix_release(xlator_t *this, fd_t *fd)
VALIDATE_OR_GOTO(this, out);
VALIDATE_OR_GOTO(fd, out);
- priv = this->private;
-
ret = fd_ctx_del(fd, this, &tmp_pfd);
if (ret < 0) {
gf_msg(this->name, GF_LOG_WARNING, 0, P_MSG_PFD_NULL,
@@ -2517,13 +2526,7 @@ posix_release(xlator_t *this, fd_t *fd)
"pfd->dir is %p (not NULL) for file fd=%p", pfd->dir, fd);
}
- gf_msg_debug(this->name, 0, "janitor: closing dir fd=%p", pfd->dir);
-
- sys_close(pfd->fd);
- GF_FREE(pfd);
-
- if (!priv)
- goto out;
+ posix_add_fd_to_cleanup(this, pfd);
out:
return 0;
diff --git a/xlators/storage/posix/src/posix.h b/xlators/storage/posix/src/posix.h
index 124dbb4..07f367b 100644
--- a/xlators/storage/posix/src/posix.h
+++ b/xlators/storage/posix/src/posix.h
@@ -134,6 +134,8 @@ struct posix_fd {
off_t dir_eof; /* offset at dir EOF */
int odirect;
struct list_head list; /* to add to the janitor list */
+ xlator_t *xl;
+ char _pad[4]; /* manual padding */
};
struct posix_private {
@@ -204,6 +206,7 @@ struct posix_private {
pthread_cond_t fsync_cond;
pthread_mutex_t janitor_mutex;
pthread_cond_t janitor_cond;
+ pthread_cond_t fd_cond;
int fsync_queue_count;
enum {
@@ -259,6 +262,7 @@ struct posix_private {
gf_boolean_t fips_mode_rchecksum;
gf_boolean_t ctime;
gf_boolean_t janitor_task_stop;
+ uint32_t rel_fdcount;
};
typedef struct {
@@ -665,6 +669,9 @@ posix_cs_maintenance(xlator_t *this, fd_t *fd, loc_t *loc, int *pfd,
int
posix_check_dev_file(xlator_t *this, inode_t *inode, char *fop, int *op_errno);
+int
+posix_spawn_ctx_janitor_thread(xlator_t *this);
+
void
posix_update_iatt_buf(struct iatt *buf, int fd, char *loc, dict_t *xdata);
--
1.8.3.1