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From 513d210cdbccfdaadb0cf7f09ba97d563aac52bb Mon Sep 17 00:00:00 2001
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From: Mike Christie <mchristi@redhat.com>
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Date: Wed, 31 Aug 2016 15:40:16 -0500
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Subject: [PATCH 10/11] rbd: check for exclusive lock enabled
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Only attach the checker if the rbd image has the exclusive lock
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enabled.
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Signed-off-by: Mike Christie <mchristi@redhat.com>
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---
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libmultipath/checkers/rbd.c | 14 +++++++++++++-
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1 file changed, 13 insertions(+), 1 deletion(-)
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diff --git a/libmultipath/checkers/rbd.c b/libmultipath/checkers/rbd.c
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index a6f3405..e34bf53 100644
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--- a/libmultipath/checkers/rbd.c
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+++ b/libmultipath/checkers/rbd.c
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@@ -33,6 +33,8 @@ typedef int (thread_fn)(struct rbd_checker_context *ct, char *msg);
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#define RBD_MSG(msg, fmt, args...) snprintf(msg, CHECKER_MSG_LEN, fmt, ##args);
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+#define RBD_FEATURE_EXCLUSIVE_LOCK (1 << 2)
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+
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struct rbd_checker_context {
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int rbd_bus_id;
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char *client_addr;
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@@ -65,8 +67,9 @@ int libcheck_init(struct checker * c)
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struct udev_device *bus_dev;
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struct udev *udev;
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struct stat sb;
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- const char *block_name, *addr, *config_info;
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+ const char *block_name, *addr, *config_info, *features_str;
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const char *image, *pool, *snap, *username;
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+ uint64_t features = 0;
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char sysfs_path[PATH_SIZE];
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int ret;
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@@ -119,6 +122,15 @@ int libcheck_init(struct checker * c)
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if (!ct->client_addr)
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goto free_dev;
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+ features_str = udev_device_get_sysattr_value(bus_dev, "features");
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+ if (!features_str)
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+ goto free_addr;
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+ features = strtoll(features_str, NULL, 16);
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+ if (!(features & RBD_FEATURE_EXCLUSIVE_LOCK)) {
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+ condlog(3, "Exclusive lock not set.");
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+ goto free_addr;
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+ }
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+
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config_info = udev_device_get_sysattr_value(bus_dev, "config_info");
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if (!config_info)
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goto free_addr;
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--
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1.8.3.1
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