You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
mdadm/SOURCES/0170-Wait-for-mdmon-when-it...

122 lines
3.8 KiB

From aa1cc5815d2b14a8b47add18cfaa8264e19c10ce Mon Sep 17 00:00:00 2001
From: Kinga Stefaniuk <kinga.stefaniuk@intel.com>
Date: Tue, 7 May 2024 05:38:56 +0200
Subject: [PATCH 2/2] Wait for mdmon when it is stared via systemd
When mdmon is being started it may need few seconds to start.
For now, we didn't wait for it. Introduce wait_for_mdmon()
function, which waits up to 5 seconds for mdmon to start completely.
Signed-off-by: Kinga Stefaniuk <kinga.stefaniuk@intel.com>
Signed-off-by: Mariusz Tkaczyk <mariusz.tkaczyk@linux.intel.com>
---
Assemble.c | 4 ++--
Grow.c | 7 ++++---
mdadm.h | 2 ++
util.c | 29 +++++++++++++++++++++++++++++
4 files changed, 37 insertions(+), 5 deletions(-)
diff --git a/Assemble.c b/Assemble.c
index f5e9ab1f..83dced19 100644
--- a/Assemble.c
+++ b/Assemble.c
@@ -2173,8 +2173,8 @@ int assemble_container_content(struct supertype *st, int mdfd,
if (!mdmon_running(st->container_devnm))
start_mdmon(st->container_devnm);
ping_monitor(st->container_devnm);
- if (mdmon_running(st->container_devnm) &&
- st->update_tail == NULL)
+ if (wait_for_mdmon(st->container_devnm) == MDADM_STATUS_SUCCESS &&
+ !st->update_tail)
st->update_tail = &st->updates;
}
diff --git a/Grow.c b/Grow.c
index 87ed9214..1923c27c 100644
--- a/Grow.c
+++ b/Grow.c
@@ -2134,7 +2134,7 @@ int Grow_reshape(char *devname, int fd,
if (!mdmon_running(st->container_devnm))
start_mdmon(st->container_devnm);
ping_monitor(container);
- if (mdmon_running(st->container_devnm) == false) {
+ if (wait_for_mdmon(st->container_devnm) != MDADM_STATUS_SUCCESS) {
pr_err("No mdmon found. Grow cannot continue.\n");
goto release;
}
@@ -3218,7 +3218,8 @@ static int reshape_array(char *container, int fd, char *devname,
if (!mdmon_running(container))
start_mdmon(container);
ping_monitor(container);
- if (mdmon_running(container) && st->update_tail == NULL)
+ if (wait_for_mdmon(container) == MDADM_STATUS_SUCCESS &&
+ !st->update_tail)
st->update_tail = &st->updates;
}
}
@@ -5173,7 +5174,7 @@ int Grow_continue_command(char *devname, int fd, struct context *c)
start_mdmon(container);
ping_monitor(container);
- if (mdmon_running(container) == false) {
+ if (wait_for_mdmon(container) != MDADM_STATUS_SUCCESS) {
pr_err("No mdmon found. Grow cannot continue.\n");
ret_val = 1;
goto Grow_continue_command_exit;
diff --git a/mdadm.h b/mdadm.h
index 1ba541fc..b71d7b32 100644
--- a/mdadm.h
+++ b/mdadm.h
@@ -1770,6 +1770,8 @@ extern struct superswitch *version_to_superswitch(char *vers);
extern int mdmon_running(const char *devnm);
extern int mdmon_pid(const char *devnm);
+extern mdadm_status_t wait_for_mdmon(const char *devnm);
+
extern int check_env(char *name);
extern __u32 random32(void);
extern void random_uuid(__u8 *buf);
diff --git a/util.c b/util.c
index e2b490e1..bf79742f 100644
--- a/util.c
+++ b/util.c
@@ -1932,6 +1932,35 @@ int mdmon_running(const char *devnm)
return 0;
}
+/*
+ * wait_for_mdmon() - Waits for mdmon within specified time.
+ * @devnm: Device for which mdmon should start.
+ *
+ * Function waits for mdmon to start. It may need few seconds
+ * to start, we set timeout to 5, it should be sufficient.
+ * Do not wait if mdmon has been started.
+ *
+ * Return: MDADM_STATUS_SUCCESS if mdmon is running, error code otherwise.
+ */
+mdadm_status_t wait_for_mdmon(const char *devnm)
+{
+ const time_t mdmon_timeout = 5;
+ time_t start_time = time(0);
+
+ if (mdmon_running(devnm))
+ return MDADM_STATUS_SUCCESS;
+
+ pr_info("Waiting for mdmon to start\n");
+ while (time(0) - start_time < mdmon_timeout) {
+ sleep_for(0, MSEC_TO_NSEC(200), true);
+ if (mdmon_running(devnm))
+ return MDADM_STATUS_SUCCESS;
+ };
+
+ pr_err("Timeout waiting for mdmon\n");
+ return MDADM_STATUS_ERROR;
+}
+
int start_mdmon(char *devnm)
{
int i;
--
2.41.0