[PATCH] kdump, add latest soft link for local dumps - kexec - Fedora mailing-lists

6 Nov 2014

Add a latest soft link for local dumps, and a user configurable option
for other cases.  This makes things easier when going through $path to
find the latest kdump.
Signed-off-by: Prarit Bhargava prarit@redhat.com
---
 kdump-lib-initramfs.sh |   10 ++++++++++
 kdump.conf             |    3 +++
 kdump.conf.5           |    9 +++++++++
 kdumpctl               |    2 +-
 kexec-kdump-howto.txt  |    5 +++++
 5 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/kdump-lib-initramfs.sh b/kdump-lib-initramfs.sh
index f882b09..925eda6 100755
--- a/kdump-lib-initramfs.sh
+++ b/kdump-lib-initramfs.sh
@@ -18,6 +18,7 @@ KDUMP_CONF="/etc/kdump.conf"
 KDUMP_PRE=""
 KDUMP_POST=""
 NEWROOT="/sysroot"
+LATEST_LINK=0
get_kdump_confs()
 {
@@ -53,6 +54,9 @@ get_kdump_confs()
             fence_kdump_nodes)
                 FENCE_KDUMP_NODES="$config_val"
             ;;
+            latest_link)
+                LATEST_LINK="$config_val"
+            ;;
             default)
                 case $config_val in
                     shell)
@@ -112,6 +116,12 @@ dump_fs()
     mv $_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR/vmcore-incomplete $_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR/vmcore
     sync
+    if [ "$HOST_IP" == "127.0.0.1" ] || [ $LATEST_LINK -eq 1 ]; then
+        echo "kdump: creating link to latest"
+        rm -f $_mp/$KDUMP_PATH/latest
+        ln -sf $KDUMP_PATH/$HOST_IP-$DATEDIR $_mp/$KDUMP_PATH/latest
+    fi
+
     echo "kdump: saving vmcore complete"
 }
diff --git a/kdump.conf b/kdump.conf
index 54b581d..a70adde 100644
--- a/kdump.conf
+++ b/kdump.conf
@@ -141,6 +141,9 @@
 # 			- List of cluster node(s) separated by space to send fence_kdump
 # 			notification to (this option is mandatory to enable fence_kdump).
 #
+# latest_link <0 | 1 >
+#			- Adds a /$path/latest soft link to the latest crashdump
+#
#raw /dev/vg/lv_kdump
 #ext4 /dev/vg/lv_kdump
diff --git a/kdump.conf.5 b/kdump.conf.5
index f1c2a2c..c1760ea 100644
--- a/kdump.conf.5
+++ b/kdump.conf.5
@@ -259,6 +259,15 @@ KDUMP_COMMANDLINE_APPEND to pass kernel command line options. Refer
 to dracut.cmdline man page for more details on module blacklist option.
 .RE
+.B latest_link <0 | 1>
+.RS
+Adds a /$path/latest soft link to the latest crashdump
+.PP
+0 - disabled
+.PP
+1 - enabled
+.RE
+
 .RE
.SH EXAMPLES
diff --git a/kdumpctl b/kdumpctl
index ee3214a..4ccc0b8 100755
--- a/kdumpctl
+++ b/kdumpctl
@@ -242,7 +242,7 @@ check_config()
    	case "$config_opt" in
    	#* | "")
    		;;
-		raw|ext2|ext3|ext4|minix|btrfs|xfs|nfs|ssh|sshkey|path|core_collector|kdump_post|kdump_pre|extra_bins|extra_modules|default|force_rebuild|dracut_args|fence_kdump_args|fence_kdump_nodes)
+		raw|ext2|ext3|ext4|minix|btrfs|xfs|nfs|ssh|sshkey|path|core_collector|kdump_post|kdump_pre|extra_bins|extra_modules|default|force_rebuild|dracut_args|fence_kdump_args|fence_kdump_nodes|latest_link)
    		[ -z "$config_val" ] && {
    			echo "Invalid kdump config value for option $config_opt."
    			return 1;
diff --git a/kexec-kdump-howto.txt b/kexec-kdump-howto.txt
index 5582e40..9866fc7 100644
--- a/kexec-kdump-howto.txt
+++ b/kexec-kdump-howto.txt
@@ -476,6 +476,11 @@ Core collector command format depends on dump target type. Typically for
 filesystem (local/remote), core_collector should accept two arguments.
 First one is source file and second one is target file. For ex.
+Latest Link
+
+The 'latest_link' parameter can be set to one to create a 'latest' soft link
+in the specifie dump path directory.
+
 ex1.
 ---
 core_collector "cp --sparse=always"
-- 
1.7.9.3


    