forked from pool/multipath-tools
83 lines
2.4 KiB
Plaintext
83 lines
2.4 KiB
Plaintext
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From 23348c651f2c4bc7d41a6aa32957615403cf1533 Mon Sep 17 00:00:00 2001
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From: Hannes Reinecke <hare@suse.de>
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Date: Tue, 13 Jan 2009 15:32:52 +0100
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Subject: [PATCH] Don't run checkers or prio for blocked devices
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When a device is in 'blocked' state any I/O to it will be
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blocked. Hence multipathd will stall when running the
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path checker until the device is unblocked, leaving the
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entire mulitpath daemon hanging.
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So we have to check for the state and _not_ run any
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checker or prioritizer if the device is blocked.
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References: bnc#464155
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Signed-off-by: Hannes Reinecke <hare@suse.de>
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---
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libmultipath/discovery.c | 35 +++++++++++++++++++++++++++++++++++
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1 files changed, 35 insertions(+), 0 deletions(-)
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diff --git a/libmultipath/discovery.c b/libmultipath/discovery.c
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index a18a46a..afd247d 100644
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--- a/libmultipath/discovery.c
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+++ b/libmultipath/discovery.c
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@@ -144,6 +144,7 @@ declare_sysfs_get_str(cutype);
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declare_sysfs_get_str(vendor);
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declare_sysfs_get_str(model);
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declare_sysfs_get_str(rev);
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+declare_sysfs_get_str(state);
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int
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sysfs_get_dev (struct sysfs_device * dev, char * buff, size_t len)
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@@ -688,6 +689,23 @@ get_state (struct path * pp)
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condlog(3, "%s: get_state", pp->dev);
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+ if (pp->bus == SYSFS_BUS_SCSI && pp->sysdev) {
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+ struct sysfs_device *parent;
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+ char dev_state[32];
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+
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+ /* check device state */
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+ parent = sysfs_device_get_parent(pp->sysdev);
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+ if (parent && !strncmp(parent->kernel, "block", 5))
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+ parent = sysfs_device_get_parent(parent);
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+ if (parent && !sysfs_get_state(parent, dev_state, 32)) {
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+ if (!strncmp(dev_state, "blocked", 7)) {
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+ condlog(3, "%s: device blocked", pp->dev);
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+ pp->state = PATH_DOWN;
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+ pp->priority = 0;
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+ return 0;
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+ }
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+ }
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+ }
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if (!checker_selected(c)) {
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select_checker(pp);
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if (!checker_selected(c)) {
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@@ -714,6 +732,23 @@ get_prio (struct path * pp)
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if (!pp)
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return 0;
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+ if (pp->bus == SYSFS_BUS_SCSI && pp->sysdev) {
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+ struct sysfs_device *parent;
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+ char dev_state[32];
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+
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+ /* check device state */
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+ parent = sysfs_device_get_parent(pp->sysdev);
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+ if (parent && !strncmp(parent->kernel, "block", 5))
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+ parent = sysfs_device_get_parent(parent);
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+ if (parent && !sysfs_get_state(parent, dev_state, 32)) {
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+ if (!strncmp(dev_state, "blocked", 7)) {
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+ condlog(3, "%s: device blocked", pp->dev);
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+ pp->priority = PRIO_UNDEF;
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+ return 0;
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+ }
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+ }
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+ }
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+
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if (!pp->prio) {
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select_prio(pp);
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if (!pp->prio) {
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--
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1.5.3.2
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