Reviewed-by: Benjamin Marzinski <bmarz...@redhat.com>
Signed-off-by: Martin Wilck <mwi...@suse.com>
---
libmultipath/checkers/tur.c | 54 ++++++++++++++++++++-----------------
1 file changed, 30 insertions(+), 24 deletions(-)
diff --git a/libmultipath/checkers/tur.c b/libmultipath/checkers/tur.c
index a6c88eb2..22734be2 100644
--- a/libmultipath/checkers/tur.c
+++ b/libmultipath/checkers/tur.c
@@ -29,12 +29,19 @@
#define TUR_CMD_LEN 6
#define HEAVY_CHECK_COUNT 10
-#define MSG_TUR_UP "tur checker reports path is up"
-#define MSG_TUR_DOWN "tur checker reports path is down"
-#define MSG_TUR_GHOST "tur checker reports path is in standby state"
-#define MSG_TUR_RUNNING "tur checker still running"
-#define MSG_TUR_TIMEOUT "tur checker timed out"
-#define MSG_TUR_FAILED "tur checker failed to initialize"
+enum {
+ MSG_TUR_RUNNING = CHECKER_FIRST_MSGID,
+ MSG_TUR_TIMEOUT,
+ MSG_TUR_FAILED,
+};
+
+#define _IDX(x) (MSG_ ## x - CHECKER_FIRST_MSGID)
+const char *libcheck_msgtable[] = {
+ [_IDX(TUR_RUNNING)] = " still running",
+ [_IDX(TUR_TIMEOUT)] = " timed out",
+ [_IDX(TUR_FAILED)] = " failed to initialize",
+ NULL,
+};
struct tur_checker_context {
dev_t devt;
@@ -47,7 +54,7 @@ struct tur_checker_context {
pthread_mutex_t lock;
pthread_cond_t active;
int holders; /* uatomic access only */
- char message[CHECKER_MSG_LEN];
+ int msgid;
};
int libcheck_init (struct checker * c)
@@ -99,7 +106,7 @@ void libcheck_free (struct checker * c)
}
static int
-tur_check(int fd, unsigned int timeout, char *msg)
+tur_check(int fd, unsigned int timeout, short *msgid)
{
struct sg_io_hdr io_hdr;
unsigned char turCmdBlk[TUR_CMD_LEN] = { 0x00, 0, 0, 0, 0, 0 };
@@ -118,7 +125,7 @@ retry:
io_hdr.timeout = timeout * 1000;
io_hdr.pack_id = 0;
if (ioctl(fd, SG_IO, &io_hdr) < 0) {
- snprintf(msg, CHECKER_MSG_LEN, MSG_TUR_DOWN);
+ *msgid = CHECKER_MSGID_DOWN;
return PATH_DOWN;
}
if ((io_hdr.status & 0x7e) == 0x18) {
@@ -126,7 +133,7 @@ retry:
* SCSI-3 arrays might return
* reservation conflict on TUR
*/
- snprintf(msg, CHECKER_MSG_LEN, MSG_TUR_UP);
+ *msgid = CHECKER_MSGID_UP;
return PATH_UP;
}
if (io_hdr.info & SG_INFO_OK_MASK) {
@@ -171,14 +178,14 @@ retry:
* LOGICAL UNIT NOT ACCESSIBLE,
* TARGET PORT IN STANDBY STATE
*/
- snprintf(msg, CHECKER_MSG_LEN, MSG_TUR_GHOST);
+ *msgid = CHECKER_MSGID_GHOST;
return PATH_GHOST;
}
}
- snprintf(msg, CHECKER_MSG_LEN, MSG_TUR_DOWN);
+ *msgid = CHECKER_MSGID_DOWN;
return PATH_DOWN;
}
- snprintf(msg, CHECKER_MSG_LEN, MSG_TUR_UP);
+ *msgid = CHECKER_MSGID_UP;
return PATH_UP;
}
@@ -244,7 +251,7 @@ static void *tur_thread(void *ctx)
{
struct tur_checker_context *ct = ctx;
int state, running;
- char msg[CHECKER_MSG_LEN];
+ short msgid;
/* This thread can be canceled, so setup clean up */
tur_thread_cleanup_push(ct);
@@ -254,13 +261,13 @@ static void *tur_thread(void *ctx)
minor(ct->devt));
tur_deep_sleep(ct);
- state = tur_check(ct->fd, ct->timeout, msg);
+ state = tur_check(ct->fd, ct->timeout, &msgid);
pthread_testcancel();
/* TUR checker done */
pthread_mutex_lock(&ct->lock);
ct->state = state;
- strlcpy(ct->message, msg, sizeof(ct->message));
+ ct->msgid = msgid;
pthread_cond_signal(&ct->active);
pthread_mutex_unlock(&ct->lock);
@@ -313,7 +320,7 @@ int libcheck_check(struct checker * c)
return PATH_UNCHECKED;
if (c->sync)
- return tur_check(c->fd, c->timeout, c->message);
+ return tur_check(c->fd, c->timeout, &c->msgid);
/*
* Async mode
@@ -325,13 +332,12 @@ int libcheck_check(struct checker * c)
pthread_cancel(ct->thread);
condlog(3, "%d:%d : tur checker timeout",
major(ct->devt), minor(ct->devt));
- MSG(c, MSG_TUR_TIMEOUT);
+ c->msgid = MSG_TUR_TIMEOUT;
tur_status = PATH_TIMEOUT;
} else {
pthread_mutex_lock(&ct->lock);
tur_status = ct->state;
- strlcpy(c->message, ct->message,
- sizeof(c->message));
+ c->msgid = ct->msgid;
pthread_mutex_unlock(&ct->lock);
}
ct->thread = 0;
@@ -344,7 +350,7 @@ int libcheck_check(struct checker * c)
ct->thread = 0;
pthread_mutex_lock(&ct->lock);
tur_status = ct->state;
- strlcpy(c->message, ct->message, sizeof(c->message));
+ c->msgid = ct->msgid;
pthread_mutex_unlock(&ct->lock);
}
} else {
@@ -376,7 +382,7 @@ int libcheck_check(struct checker * c)
/* Start new TUR checker */
pthread_mutex_lock(&ct->lock);
tur_status = ct->state = PATH_PENDING;
- ct->message[0] = '\0';
+ ct->msgid = CHECKER_MSGID_NONE;
pthread_mutex_unlock(&ct->lock);
ct->fd = c->fd;
ct->timeout = c->timeout;
@@ -392,7 +398,7 @@ int libcheck_check(struct checker * c)
ct->thread = 0;
condlog(3, "%d:%d : failed to start tur thread, using"
" sync mode", major(ct->devt), minor(ct->devt));
- return tur_check(c->fd, c->timeout, c->message);
+ return tur_check(c->fd, c->timeout, &c->msgid);
}
tur_timeout(&tsp);
pthread_mutex_lock(&ct->lock);
@@ -401,7 +407,7 @@ int libcheck_check(struct checker * c)
&tsp);
if (!r) {
tur_status = ct->state;
- strlcpy(c->message, ct->message, sizeof(c->message));
+ c->msgid = ct->msgid;
}
pthread_mutex_unlock(&ct->lock);
if (tur_status == PATH_PENDING) {
--
2.19.1
--
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