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kdump-lib-initramfs.sh: Add check to remount to rw mode only if dump target is ro. 

Currently the script does not check if the dump target is read-only and would
always mount to read-write mode. This caused an issue with nfs mount as the
fstab options would be reconsidered while remounting to read-write mode.
The remount would fail with the below error as all options cannot be changed
runtime.

mount.nfs: mount(2): Invalid argument
mount.nfs: an incorrect mount option was specified

Which in result would not save the vmcore on the dump target.

This patch addresses this issue by checking the dump target status for read-only.
If yes, remount to read-write mode without reconsidering the fstab options.

Signed-off-by: Kenneth D'souza <kdsouza@redhat.com>
Acked-by: Kairui Song <kasong@redhat.com>
This commit is contained in:
Kenneth Dsouza 2018-10-11 13:54:58 +05:30 committed by Kairui Song
parent 67e5c8d226
commit ac55095191
1 changed files with 7 additions and 1 deletions
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8
kdump-lib-initramfs.sh
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@ -87,6 +87,7 @@ dump_fs()
local _dev=$(findmnt -k -f -n -r -o SOURCE $1)
local _mp=$(findmnt -k -f -n -r -o TARGET $1)
local _op=$(findmnt -k -f -n -r -o OPTIONS $1)
echo "kdump: dump target is $_dev"
@ -100,7 +101,12 @@ dump_fs()
echo "kdump: saving to $_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR/"
mount -o remount,rw $_mp || return 1
# Only remount to read-write mode if the dump target is mounted read-only.
if [[ "$_op" = "ro"* ]]; then
echo "kdump: Mounting Dump target $_dev in rw mode."
mount -o remount,rw $_dev $_mp || return 1
fi
mkdir -p $_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR || return 1
save_vmcore_dmesg_fs ${DMESG_COLLECTOR} "$_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR/"