Resolves: BZ1348898
dracut-functions.sh defines a get_persistent_dev(). Earlier, we had another
local get_persistent_dev() in mkdumprd, however that was moved to
kdump-lib.sh, so that it can be reused in kdumpctl.
Since, dracut-module-setup.sh (which is dracut's
99kdumpbase/module-setup.sh) sources kdump-lib.sh. Therefore, once dracut
will execute 99kdumpbase module, it's own get_persistent_dev() function is
overwritten by kdump's version. If any other dracut module calls
get_persistent_dev() thereafter then, kdump's version is executed, which was
not expected.
Therefore rename kdump's get_persistent_dev() as kdump_get_persistent_dev()
to avoid any name contention.
Signed-off-by: Pratyush Anand <panand@redhat.com>
Acked-by: Xunlei Pang <xlpang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
to_dev_name() and get_persistent_dev() can be used by function in kdumpctl.
Therefore moving them to kdump-lib.sh.
No functional changes.
Signed-off-by: Pratyush Anand <panand@redhat.com>
Acked-by: Xunlei Pang <xlpang@redhat.com>
Acked-by: Baoquan He <xlpang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
raw devices are not mounted and also does not need to contain any
filesystem. So they may have UUIDs(when formatted) and may not have UUIDs
when raw. Therefore, do not look for persistent names by-uuid for raw
devices.
Signed-off-by: Pratyush Anand <panand@redhat.com>
Suggested-by: Dave Young <dyoung@redhat.com>
Acked-by: Xunlei Pang <xlpang@redhat.com>
Acked-by: Baoquan He <xlpang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Ifcfg depends on network module, which is quite large and useless
when using a local dump target. Also we don't really need ifcfg to
setup network interfaces. So just remove it.
On fedora22, the uncompressed dumprd would decrease about 20MB when
using a local dump target. A regression testing is also conducted with
targets of nfs and ssh.
Signed-off-by: Dangyi Liu <dliu@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
Customer found when specify "noauto" option in fstab for nfs mount,
dump failed.
The reason is if "noauto" option is specified in fstab, the mount entry
in fstab related to dump target will passed to dracut and stored in
kdump initrd. Then during kdump kernel boots this entry containing
"noauto" will be ignored by mount service. This cause dump failing.
In fact with "noauto" not only nfs dump will fail, non-root disk dump
will fail too. root disk dump can dump successfully since root disk can
always be mounted by systemd.
So now "noauto" need be filtered out when the fstab entry corresponding
to dump target contains "noauto".
Changelog:
v4 -> v5
code comment is not clear enough. supplement it.
Signed-off-by: Qiao Zhao <qzhao@redhat.com>
Acked-by: Minfei Huang <mhuang@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
kdump will raise the warning in Atomic, if the path is bind mounted
directory. The reason why causes this issue is kdump cannt parse the
bind mounted directory.
To correct dumping target, we can construct the real dumping path in
Atomic, which contains two part, one bind mounted path, the other
specified dump target.
Following is an example:
-bash-4.2# cat /etc/kdump.conf | grep ^path
path /var/crash
-bash-4.2# findmnt /var | tail -n 1 | awk '{print $2}'
/dev/mapper/atomicos-root[/ostree/deploy/rhel-atomic-host/var]
-bash-4.2# findmnt -v /var | tail -n 1 | awk '{print $2}'
/dev/mapper/atomicos-root
Then we can found it that the real path of dumping vmcore is
/ostree/deploy/rhel-atomic-host/var/crash.
To fix this issue, we can replace the target path as the real path which
is from above parsing.
Signed-off-by: Minfei Huang <mhuang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
Any block device can be mounted multiply on the different mount point.
Once a mount point is mounted in bind mode, the general mount point can
be unmounted. Thus kdump would not find the general mount point[1] to
handle the path.
The mount point, which is as general mount point, will be got by
"fintmnt" previously. But the mntpoint may be incorrect, if the mntpoint
is bind mount.
In order to fix it to support bind mounted in atomic, we will add a
judgement to comfirm the mntpoint is bind mounted, or not.
For general mount, returning path is like following, if we use
"findmnt". The returning is same as "findmnt -v".
-bash-4.2# findmnt /var | tail -n 1 | awk '{print $2}'
/dev/mapper/atomicos-root
But for bind mount, returning path is like following, if we use
"fintmnt".
-bash-4.2# findmnt /var | tail -n 1 | awk '{print $2}'
/dev/mapper/atomicos-root[/ostree/deploy/rhel-atomic-host/var]
Use "findmnt -v" is like this:
-bash-4.2# findmnt -v /var | tail -n 1 | awk '{print $2}'
/dev/mapper/atomicos-root
So we can determine the bind mount, if the returning is different
between "findmnt" and "findmnt -v".
[1] general mount point is a directory without being in bind mounted
mode, just a normal directory.
Signed-off-by: Minfei Huang <mhuang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
Now kdump cannt parse the path correctly, if the path contains
duplicated "/". Following is an example to explain it detail. (the
directory /mnt is a mount point which is mounted a block device)
path //mnt/var/crash
Then the warning will raise.
Force rebuild /boot/initramfs-3.19.1kdump.img
Rebuilding /boot/initramfs-3.19.1kdump.img
df: ‘/mnt///mnt/var/crash’: No such file or directory
/sbin/mkdumprd: line 239: [: -lt: unary operator expected
kexec: loaded kdump kernel
Starting kdump: [OK]
For above case, kdump fails to check the fs size, due to the incorrect
path.
In kdump code flow, we will cut out the mount point(/mnt) from the
path(//mnt/var/crash). But the mount point cannt match the path, because
of the duplicated "/".
To fix it, we will strip the duplicated "/" firstly.
Signed-off-by: Minfei Huang <mhuang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
Jerry Hoemann reported a bug that a mount will fail when he installed
a system with separate "/" "/var" and "/var/crash". That means root
disk /dev/a mounted on /, and another disk /dev/b is mounted on /var,
then the 3rd disk /dev/c mounted on /var/crash. Then kdump will fail
since mount will fail.
This is because the mount information will be written into
/$mntimage/etc/fstab like below. And the dump target is /dev/c. However
/dev/b is not related in kdump, its mount info is not necessary and not
saved. So when go into kdump kernel, it will find there's not a crash
dir under /sysroot/var. And in current implementation, if not a root
disk dump, sysroot is a read-only mount, no dir can be created in this
situation.
/dev/disk/by-uuid/cdcf007a-b623-45ee-8d73-a8be0d372440 /sysroot/var/crash xfs rw,relatime,...,x-initrd.mount 0 2
So in this patch, change the mount behavior to fix this bug. If dump
target is a root disk, mount point is /sysroot. If dump target is not
root, just mount it to /kdumproot/$_target. Now it works.
Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Acked-by: WANG Chao <chaowang@redhat.com>
Tested-by: Jerry Hoemann <jerry.hoemann@hp.com>
Previously if a target need mount info, the relevant mount options
are got from /proc/mounts by below command:
findmnt -k -f -n -r -o OPTIONS $_dev
This will bring problems. Since /proc/mounts will give out a set
which contains each option. Some options have value specified by
user, some options just have default value if user doesn't specify.
If some mount options are not supported very well, bugs occured.
The more options, the worse.
So in this patch, we try to check fstab to get mount options firstly,
this give user a chance to decide which options they really want.
If they don't give a fstab entry, then we trust all options in
/proc/mounts.
Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Now when mount in /etc/fstab fails, systemd would not consider it as
critical and it would continue to boot. In fact, emergency service is
triggered, but not in a isolation mode, and it results in the emergency
service getting shutdown at some point later of the boot process. We
need isolation otherwise we won't see any emergency service.
That is because in kdump initramfs, mount units specified in /etc/fstab
are required by "local-fs.target". When any of these mounts fails,
local-fs.target fails.
For kdump initramfs, we need to isolate to emergency service on any of
the mount failure, that said, every service should be stopped and onlu
emergency service would run. But local-fs.target won't trigger that on
its failure. That means in case of mount failure, local-fs.target also
enters failure state, but all the service will continue without any
interruption.
After digging looking into source code of systemd-fstab-generator. I
find "x-initrd.mount" using in initramfs mount, will make the mount
units required by "initrd-root-fs.target" rather than it's used to be
"local-fs.target".
"initrd-root-fs.target" is suitable to us because if it fails, it will
isolate to emergency service. That means in case of any mount failure,
the emergeny service will start and everything else will stop. We want
this effect because we need to take kdump fail-safe action when there's
a mount failure.
From systemd unit point of view, "initrd-root-fs.target" has
OnFailureIsolate=yes, but "local-fs.target" doesn't. From
systemd.unit(5):
OnFailureIsolate=
Takes a boolean argument. If true, the unit listed in OnFailure=
will be enqueued in isolation mode, i.e. all units that are not its
dependency will be stopped. If this is set, only a single unit may
be listed in OnFailure=. Defaults to false.
NOTE: Harald who contributed "x-initrd.mount" in systemd, confirmed that
this feature will stay.
Signed-off-by: WANG Chao <chaowang@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
This patch does the following change in 2nd kernel:
- dump target is mounted under /sysroot
With this change, we don't need to track what we've mounted in 2nd
kernel. We can just umount recursively every mount in /sysroot by
command:
umount -R /sysroot
It's very convenient to do so, because it's hard to track what we've
mounted when we're in error handling path (later patches). So mount
everything under /sysroot is reasonable and practical for us.
Also clean up a bit along with this patch.
Signed-off-by: WANG Chao <chaowang@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
In current systemd implementation, nofail mount will not block
local-fs.target, which means our kdump.sh (in dracut-pre-pivot.service)
can't wait for nofail mount. And kdump.sh could run early than nofail
mount happens.
For short term, let's stop passing nofail to mount. As for
sysroot.mount, since we have explicitly specify to wait for it, "nofail"
isn't a problem.
Signed-off-by: WANG Chao <chaowang@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
When user does not specify dump target explicitly, it's better to
dump to the "path" specified. That means after dump user enter into
1st kernel, can find vmcore in the "path". If that path is in root
fs, vmcore is stored in root fs. If separate disk is mounted on
any tier of "path", we just dump vmcore into the left path on the
left separate disk.
E.g in kdump.conf
path /mnt/nfs
in mount info,
/dev/vdb on /mnt type ext4 (rw,relatime,seclabel,data=ordered)
Then vmcore will be saved in /nfs of /dev/vdb.
In this patch, pass mount info to dracut in this case if separate
disk is mounted on any tier of "path".
Meanwhile introduce a function in kdump-lib.sh to check if any
target is specified.
v4->v5:
Per Vivek's comment, add a helper function is_fs_dump_target.
Then is_user_configured_dump_target is rewrite with these helper
functions.
v5->v7:
No v6 for this patch. Just use newly introduced function
is_fs_type_nfs in handle_default_dump_target.
Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
kdump need create the dir specified in "path" formerly if it does not
exist. Now change the behavior to be that ueser takes charge of the
"path", make sure "path" has been created, especially when separate disk
is mounted on this "path".
Also introduce 2 helper functions to help check the existence of path.
Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
These utility function will be shared by several files, they are all
operation related to mount stuff.
Meantime define DEFAULT_PATH="/var/crash".
v5-> v6:
Since in rhel7 nfs4 becomes default nfs version, and its fstype is
nfs4. So change the implementation of get_fs_type_from_target(),
whatever fstype returned from findmount, just echo nfs as fstype for all
nfs version.
v6->v7:
Introduce is_fs_type_nfs to check if fstype is nfs or nfs4 per Vivek's
idea.
Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Now when dump target is not specified, separate disk can't be mounted on
"path", e.g /var/crash. However if target is specified, whatever the default
fail action is set, mkdumprd should go ahead and not be failed.
In check_block_dump_target(), the check only on disk is not complete,
NFS and ssh need be filtered too. So introduce is_user_configured_dump_target
to check this.
Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
When kdump service is started, /sbin/mkdump checks if there is enough
free space on the ssh server using "df -P" command.
However, the slight difference in the first line of the "df -P" command
output for English and Japanese environment causes a problem.
-----
# LANG=en_us.utf8 df -P | head -1
Filesystem 1024-blocks Used Available Capacity Mount on
# LANG=ja_JP.utf8 df -P | head -1
ファイルシス 1024-ブロック 使用 使用可 容量 マウント位置
-----
Because the number of words is 7 in the English output and 6 in
Japanese, the subsequent awk command could not correctly locate the
free space field and results in an error.
One way to fix it is use df -P /var/crash|tail -1, but for remote restricted
shell pipe is not supported. Thus fix this by print field NF-2 in awk script.
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: WANG Chao <chaowang@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Let's omit resume module when building kdump initramfs, because:
- kdump don't want to resume
- it would pull in the swap device dependencie
Tested on Fedora20. This change doesn't break anything.
Signed-off-by: WANG Chao <chaowang@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
kdump now dumps vmcore to root partition by default in SAVE_PATCH
directory, e.g /var/crash defaultly. This is problematic when another
disk is mounted on /var or /var/crash, because the saved vmcore will
he hidden after dump in 1st kernel. This also has the potential of
blindly filling the root file system without a clue as to why.
Now fix this by failing the loading of kdump kernel if dump target
is root fs by default while different disk is mounted on save path.
Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Move the invocation of check_resettable() to be together with all
other invocation of functions. This can make the flow of script
clearer and more readable.
Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
In function get_block_dump_target(), code block to get user configured
dump disk and get root fs device can be reused by other places. Now
abstract and wrap them into 2 new functions:
get_user_configured_dump_disk()
get_root_fs_device()
And put them into kdump-lib.sh.
Meanwhile change the get_block_dump_target() accordingly.
Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Description:
Currently kdumpctl will fail to create kdump initramfs and start
kdump service while dump target is encrypted. This restriction is
too strict.
Resolution:
Just warn user that encrypted device is in dump path and second
kernel will wait on console for password to be entered.
Signed-off-by: arthur <zzou@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
When we're parsing kdump.conf, we read it from stdin in a while
loop statement. If we don't use ssh -n within the loop, all rest of the
kdump.conf options, which are in stdin, will be eaten by ssh.
Signed-off-by: WANG Chao <chaowang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Currently we have two issues against mounting filesystems by systemd.
1. If any failure in sysroot.mount, initrd.target won't be reached.
2. If any failure in mounting /etc/fstab, initrd.target won't be reached
Our kdump.sh is in dracut-pre-pivot hook which is ordered after
initrd.target. That means if systemd doesn't reach initrd.target,
pre-pivot service will not run.
Based on above, we can conclude that in order to run kdump.sh,
initrd.target must be reached.
To fix issue 1), we can add rootflags=nofail to 2nd kernel cmdline, so
that initrd.target will not require sysroot.mount. initrd.target
wouldn't care about the failures in sysroot.mount. That means
initrd.target can always be reached whether or not sysroot.mount fails.
So when initrd.target is reached, kdump.sh can be run.
To fix issue 2), we can append "nofail" mount options to every entry in
/etc/fstab. It has almost the same affects as to sysroot.mount.
initrd.target can be reached whether or not mount /etc/fstab fails. So
when initrd.target is reached, kdump.sh can be run.
If the mount failures block kdump from working properly (for example,
the dump target isn't mounted), the error handling will be done by
"default" action specified in /etc/kdump.conf. Otherwise kdump will
ignore the mount failures and dump as expected.
Signed-off-by: WANG Chao <chaowang@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
From: Wade Mealing <wmealing@redhat.com>
The RHEL 5 release of mkdumprd allowed for comments in the kdump config
file as shown below:
net 192.168.1.1 # this is the comment part
This patch strips them out during processing, but leaves the configuration
file in original condition.
Signed-off-by: Wade Mealing <wmealing@redhat.com>
Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Currently in the whole kdump framework, we have some common functions
used across not only mkdumprd context and dracut context, but also 1st
kernel and 2nd kernel. We defined these functions at each script, which
is obviously not decent.
So let's introduce kdump-lib.sh for the shared functions and put it
to /lib/kdump/kdump-lib.sh.
It starts small, as you can see, only 3 functions are extracted. But in
the future more and more common functions can be added.
Signed-off-by: WANG Chao <chaowang@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Currently some functions are used in subshell to assign string to a
variable. For example:
_mnt=$(to_mount "$1")
In this case if we call perror_exit in the subshell, subshell will exit
1, but the parent process (mkdumprd) won't exit.
So we should handle the exit code of a subshell if the subshell calls
perror_exit over a failure.
Signed-off-by: WANG Chao <chaowang@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
kvm virtio-blk device, for example /dev/vdb, doesn't have serial id by
default. So there's no persistent device node under /dev/disk/ for
/dev/vdb.
In case no persistent dev for dump target, we should use the original
device name directly, not failing the mkdumprd.
v2: update warn message from Vivek.
Signed-off-by: WANG Chao <chaowang@redhat.com>
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
When ssh dump, if user doesn't have write permission on save path
of server, the crash kernel can be loaded successfully, but finally
kdump will fail because write is not allowed.
Let's check it in the service start phase, if no write permission
print error message and exit.
For differentiation, change the name of old function mkdir_save_path
to mkdir_save_path_fs.
Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
We shouldn't output what dracut module are used when rebuilding kdump
initrd. It's confusing to user.
And since we've introduced dracut_args in kdump.conf, we can safely
remove this mandatory -M and let user add as his/her need.
Signed-off-by: WANG Chao <chaowang@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
mkdumprd call dracut to rebuilding kdump initrd, sometimes passing extra
dracut args is helpful. For example user can enable debug output with
--debug, --printsize to print roughly increased initramfs size by each module,
--omit-drivers to omit kernel modules, etc.
This patch enables dracut_args option for passing extra args to dracut.
Also it modifies add_dracut_arg() to treat a string with-in quote as single
string because for dracut options which has its own args, the args need to be
quoted and space seperated.
If add_dracut_arg() gets an string read from kdump.conf and if that string
contains double quotes, then while converting to positional parameters
those double quotes are not interpreted. Hence if /etc/kdump.conf contains
following.
dracut_args --add-drivers "driver1 driver2"
then add_dracut_args() sees following positional parameters
$1= --add-drivers
$2= "driver1
$3= driver2"
Notice, double quotes have been ignored and parameters have been broken
based on white space.
Modify add_dracut_arg() to look for parameters starting with " and
if one is found, it tries to merge all the next parameters till one
is found with ending double quote. Hence effectively simulating
following behavior.
$1= --add-drivers
$2= "driver1 driver2"
[v1->v2]: address quoted substring in dracut_args, also handle the leading
and ending spaces in substring.
[v2->v3]: fix dracut arguments seperator in kdump.conf.
[v3->v4]: improve changelog, thanks vivek.
[v4->v5]: make the manpage more verbose [vivek].
Tested with below dracut_args test cases:
1. dracut_args --add-drivers "pcspkr virtio_net" --omit-drivers "sdhci-pci hid-logitech-dj e1000"
2. dracut_args --add-drivers " pcspkr virtio_net " --omit-drivers "sdhci-pci hid-logitech-dj e1000"
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
We do not support dump to an encrypted disk now, so adding the functions to
error out if any of the dump target is encrypted.
This patch is based on the check resettable patches from BaoQuan which added
some dracut functions for iterating block devices.
Currently dracut support an encrypted rootfs, but it need interacive entering
passcode. It might be possible to use some keyfile to pass the key checking.
But let's fisrtly check and error out. In the future if there's such
requirement we can look into it that time.
Tested in F18 with encrypted root, encrypted disk other than root and
dump_to_rootfs with encrypted root.
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Some Smart Array (hpsa/cciss) adapters don't support reset, we need
to disable kdump on those devices, like rhel6 did.
In this patch, the dump target is checked according to below
criteria if it's a block device.
If it's cciss disk but is resettbale, can be used as dump target.
If it's cciss disk but is not resettable, can not be used as dump
target.
If it's cciss disk and not resettable, but user set OVERRIDE_RESETTABLE
to 1 in /etc/sysconfig/kdump, can be taken as dump target. Because
user know the situation and want to have a try.
In this patch, added codes include 4 parts:
1)Add an option "override_resettable <0 | 1>" into kdump.conf, and
add related section into kdump.conf man page. In mkdumprd, will check
whether user has set a value, get that value if yes. By default, the
value is 0.
2)port utility functions from dracut-functions.sh.
3)The check_resettable function checks if dump target is a resettable
block device. This includes the case where default action dump_to_rootfs
is set.
Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
We use function to pass stdout to a variable, like get_persistent_dev
but it will echo some error message and exit in some cases, instead of
redirect all the echo to stderr, this patch adds a function perror_exit
to fix this and simplify/cleanup related code.
Also add another function perror() for cases where no need to exit.
Signed-off-by: Dave Young <dyoung@redhat.com>
Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Current blacklist option is different from the option in rhel6. In current
implementation blacklist just means omit the driver, but it should really
be preventing it being loaded in initramfs.
To keep consistent, just make the option as deprecated. User is suggested
to user dracut kernel cmdline rd.driver.blacklist instead.
[v1->v2]: improve man page description, thanks Vivek.
Tested in kvm guest with rd.driver.blacklist in kdump sysconfig
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Add a function check_config to check kdump config file.
1. move multi dump target checking into this function
2. check invalid config options and obsolete config options
3. check null config value.
[v2->v3]: add detail doc about deprecated options in kdump.conf manpage.
[v3->v4]: print out the bad config option in case it is not valid.
[v4->v5]: improve documentation according to comments from Vivek.
[v5->v6]: s/Deprecated/Invalid for invalid config options.
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Marc Milgram <mmilgram@redhat.com>
Moving the checking target mount code a little earlier to ensure
dump target is mounted and fail out early before other handlings.
This change also cleanup a bit for the related code.
Tested UUID/devname local dump, also tested the non-exist kdump target.
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Previously to_dev_name use blkid to get dev name from dump target,
but blkid can not handle UUID/LABEL with quotes so to_dev_name will
silently fail.
Because we enforce dump target being mounted before creating kdump
initrd, so change to use findmnt is fine. findmnt can handle input
params with quotes.
to_dev_name is not necessary anymore, just remove it.
Also there's another user of it is for checking if the dev is root
or not, here change to use findmnt for this as well.
Tested the rootfs dump, UUID with/without quotes dump.
Signed-off-by: Dave Young <dyoung@redhat.com>
Reviewed-by: Caspar Zhang <czhang@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
We need fs dump target being mounted firstly before creating mkdumprd
This is because we want to get the mount options from kernel mountinfo
instead of simply mount it without considering mount options.
To avoid the filesystem being used by something other than kdump we
suggest them to mount it as 'ro', mkdumprd will remount it as 'rw' when
necessary and remount it back to 'ro'
In 2nd kernel kdump will still use 'rw' to mount it though.
Tested local read-only mounted fs dump.
[v1->v2]: improve documentation
add error handling for `mount -o remount,ro`
Fixed the changelog per Vivek's comment
The code was reviewed by Vivek.
Signed-off-by: Dave Young <dyoung@redhat.com>
Resolves: bug 868990
ssh will send local stdin input to remote side, this cause trouble
when we call ssh in the loop of parsing kdump.conf.
Ie. if we specify both 'ssh' and 'core_collector' option in kdump.conf,
and put 'core_collector' behind 'ssh', there will be no chance to
handle 'core_collector' because in get_ssh_size() ssh eat all the later
input of the while loop.
Fix this by use /dev/null as stdin in get_ssh_size().
Tested in fedora kvm guest.
Signed-off-by: Dave Young <dyoung@redhat.com>
Suggested-by: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
For devices with filesystem, udev /dev/disk/by-uuid/* links are usually
reliable. But one exception is multipath devices, child and top layer
device may have same uuid.
As dm devices maintain /dev/mapper/* as persistent names, so converting to
/dev/mapper/* firstly then try by-uuid/* and by-id/*
Also because user know better what's the persistent name we just document well
to suggest user use persistent name in kdump.conf. it's suggested to
to use lvm or multipath canonical names or uuid/label.
Updated kdump.conf examples and related chunks in kexec-kdump-howto.txt
use lvm /dev/vg/<devname> in examples
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
For raw device dump, also pass persistent name to dracut --device to fix
the device renaming problem.
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
currently --mount param are retrieved from /proc/mounts, but the device
name could be renamed in initramfs. So here convert them to persistent
names before passing to dracut
lvm canonical dev name is /dev/mapper/lvname-link which will be showed
in /proc/mounts
here fix get_mp function by using findmnt utils to find the mount point.
This patch depends on below dracut patch:
http://permalink.gmane.org/gmane.linux.kernel.initramfs/2903
[chaowang]:
in case device is not mounted we should not echo the mount line in to_mount()
use findmnt -n to strip the header line
for nfs don't pass persistent name to dracut
[vivek]:
improve variable names
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Copy the function get_persistent_dev from dracut for us to handle the
persistent name issues.
[vivek] add error handling for get_persistent_dev
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
For raw device upon complex storage such as multipath and iscsi
dracut does not resolve the module dependency automaticlly,
I sent a patch for the device pass via dracut argument "--device"
see below for reference:
http://permalink.gmane.org/gmane.linux.kernel.initramfs/2836
Add --device <device> in mkdumprd for raw dump to fix this issue.
Testing:
raw dump on iscsi targets.
Signed-off-by: Dave Young <dyoung@redhat.com>
Tested-by: Chao Wang <chaowang@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Currently net options means either nfs or ssh dump.
Better to split these two into standalone options. That's more clear to user.
after the split, ssh dump need user specify "ssh user@host"
nfs dump need user specify "nfs host:nfsshare"
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
For "-c /dev/null" Harald mentioned that it is useless.
In fact, dracut code [[ -f /dev/null ]] will return false thus it will still use
the default config file
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Cong Wang <amwang@redhat.com>
kernel-modules and kdumpbase will be included automaticlly when check() pass.
So no need explictly specify them in dracut cmdline.
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
file install code should stay in module-setup.sh, move core_collector installation
code as well.
Note: mkdumpfile is installed twice before, one is dracut cmdline, another is
module_setup.sh. This patch removed the duplicate code in dracut cmdline.
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
moving file install code to module-setup.sh looks better.
This patch move extra_bins installation to module-setup.sh
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
For core_collector like makedumpfile use case, it will compress and filter the
vmcore so free space small than memtotal is mostly ok. But we can not guarantee
it will be always ok.
The "there is not enough space" is not accurate, improve it to "there might be
not enough space"
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Resolves: bz821997
dracut will mount rootfs for us, so we need not pass root to fstab again here.
Here remove the root-mount line.
This will depends on the root=cmdline is right, by default kdump will
inherit it from /proc/cmdline.
Vivek: add document about the assumption for the root= cmdline issue.
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
fstab-sys module will be added automaticlly when there's --mount passed
So no need to explictly add it in dracut cmdline
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
dash is be default omited in f17, but we use -o in command line so our omit
modules list will overwrite the system configs, so dash will be installed to
initramfs.
Here avoid install dash by adding it to the '-o' list
Also remove dash dependency from rpm spec
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
s390x netdev need special cmdline to bring up
parse the ifcfg file to append proper cmdline, also add znet dracut module
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Resolves: bz806196
Adding check_size function for filesystem dump, also move common code to
top of the file because get_fs_size need know the mount point.
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
The original blacklist patch was applied without conflict.
But in fact there's exactly same context with amerigo's original patch and
it's in wrong place!
Moving it to the right switch branch..
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
For the "blacklist" here, it means prevent the kernel modules
from loading into kdump initrd, which is different from RHEL6.
Signed-off-by: Dave Young <dyoung@redhat.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
1. only append '-F' for default core_collector internally
2. error out if user does not add '-F' for makedumpfile
v1->v2: refresh because of new core collector verify function
v2->v3: optimize the code, remove local variable for default core_collector
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
1. add core_collector filter support to ssh dump
2. scp can be specified in kdump.conf
3. error out if no '-F' with makedumpfile
4. add proper explanation and examples to kdump.conf[.5] and kexec-kdump-howto.txt.
v1->v2: add verify_core_collector function
v2->v3: optimize the code, remove local variable for default core_collector
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Resolves: bz821997
while root is set to dump target, it can not be unmounted because plymouthd
are holding it. umount failing will cause calling of default_action.
Omit plymouth module to fix this issue.
Also drop "--add dash" or dracut will report error "dash is not found", this
is because default fedora dracut.conf will omit dash.
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
dracut args pass through will be introduced later, remove this firstly.
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
-d option is not implemented and unused, remove it from mkdumprd
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
BZ: 817044
Harald suggested that we use --add kdumpbase instead of -m kdumpbsae. As
-m means only use modules specified on the command line. I am not sure
that kdump will ever know the list of modules it wants to use. It might
be a good idea to let dracut decide it based on --mount option.
Also start using --hostonly to make sure atleast our default dumping to
root disk always works.
I also noticed that with --add and --hostonly initramfs size came down. So
for the time being just bring down the initramfs size.
But it still looks big and this area will require more experimentation and
bug fixing to make sure we are generatiing optimal size images for kdump
purposes and get rid of bloat. I am just beginning to understand dracut,
so expect more churn in this area down the line from me.
I am posting this patch for the bz opened again F18. As it is reducing
initramfs size significantly, I think it is a good idea to commit it
in F17 branch also.
Following is image size comparision.
Dump to root disk.
------------------
vanilla compressed: 13MB
hostonly compressed: 7.5MB
Dump to nfs
-----------
vanilla compressed: 24MB
hostonly compressed: 13MB
Dump over ssh
-------------
vanilla compressed: 23.5 MB
hostonly compressed: 12 MB
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Resolves: bz805783
kdumpctl: save_raw if found vmcore
mkdumprd: checking available size of raw disk
dracut module: do the dumping
Note, add a dir /kdumpscripts for monitor_dd_progress and future
kdump scripts
[v1->v2]: monitor_dd_process become a script instead of a function
add missed utils
use pipe with dc
[v2->v3]: Don: fix dd_progress_file typo
Vivek: move [ -f $conf_file ] earlier
don't split keyfile= and [ -f keyfile ]
move default core_collector earlier
move non-makedumpfile warnings to mkdumprd
make check available size a common function
Amerigo: use less pipe for grep then awk print
use shell (( )) instead of dc
use cut instead of awk
no need install dc and awk
make DD_BLKSIZE a variable
don't add 0755 file in git, chmod in module-setup.sh
[v3->v4]: vivek: kdumpctl multi raw target handling
monitor_dd_progress- fix wrong size calculation:
the tail -1 of dd pregress file is in bytes instead of blocks
only print the whole dd src file size for non-filtered case
check [ -b raw target device ] before dump
[v4->v5]: vivek: move check [ -b $1 ] before monitor_dd_progress
remove multi target function
[v5->v6]: vivek: only warning for raw dump of non-makedumpfile core_collector
[v6->v7]: kdumpctl should return 0 when there's no raw target
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Add ssh dump support
changes including below items:
1. sshkey option
2. sshkey propagate
3. fix a bug of _server ip calculation for dump target string
4. change the prefix of kdump hook from 93 to 01 to avoid dhclient and
other cleanups happening before us
5. enable network with dracut cmdline rd.neednet=1 when there's network
target config
[v1 - v2]:
Only check_ssh_target when there's ssh dump target in kdump config file
[v2 -> v3]
style fixes: trailing spaces and space before tab indent
remove set -x
simply check_ssh_target
use awk to get sshkey option value
change pivot hook order to 0000
Signed-off-by: Dave Young <dyoung@redhat.com>
