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Commit Graph

82 Commits

Author SHA1 Message Date
David Teigland
e291178633 device_id: simplify devname matching
Handle this case directly rather than going through the
process for reading other device ids.  Also simplify
matching alternate dm devnames.
2023-10-23 15:17:29 -05:00
David Teigland
46521a46d2 device_id: no idname should be NULL not empty string
One place was setting idname to "" instead of NULL when
there was no idname value.
2023-10-23 15:17:29 -05:00
David Teigland
9ff0615546 device_id: first match non-devname device ids
Incorrectly matching a dev to a devname id (due to changing devnames)
before matching the dev to a proper device id, can result in the
dev not being matched to the real id.
2023-10-23 15:17:29 -05:00
David Teigland
a836872199 device_id: accept wwids containing QEMU HARDDISK
A wwid may be useful even when it contains the string
"QEMU HARDDISK", so allow these to be used.
2023-10-16 15:21:22 -05:00
David Teigland
d8d4260df8 device_id: improve handling of non-standard wwid prefixes 2023-10-16 15:12:12 -05:00
Zdenek Kabelac
6afaaca2e5 cov: enusure pointer to idname exists 2023-10-14 23:12:57 +02:00
David Teigland
63b469c160 device_id: fix hints with device ids
Fix some interactions between device IDs and hints.  Hints
may limit the scanned devices which should not always trigger
a search for the PVs that were intentionally not scanned.
Hints should also be invalidated if they contain a device
that's become excluded by an internal filter such as the
device_id filter.
2023-10-10 11:47:29 -05:00
David Teigland
f20be398a1 device_id: refresh devname idnames if any are not found
Search for a PV on other devices if it's a devname entry
and the name doesn't exist on the system.  This restores
code that should not have been removed in commit 1901a47df
"device_id: fix conditions for device_ids_refresh"
2023-10-10 11:46:21 -05:00
David Teigland
25a87ea16a device_id: fix lvmdevices update segfault
From commit 1901a47df1
"device_id: fix conditions for device_ids_refresh"
2023-10-06 12:24:34 -05:00
David Teigland
1901a47df1 device_id: fix conditions for device_ids_refresh
Fix commit 847f1dd99c
"device_id: rewrite validation of devname entries"

which began calling device_ids_refresh() in cases where it
was unnecessary, leading to extra PV searches and warnings.
Specifically, a command like "lvs <vg>" would use the hints
file to scan only devices for the named VG.  This means that
scanning other PVs would be skipped, and device IDs of those
PVs could not be validated because there are no PVID values
to verify.  This missing info would cause messages about
the missing info, and would cause device_ids_refresh to
search for the PVs that had been intentionally skipped.
2023-10-05 15:33:55 -05:00
David Teigland
88aa285a79 devices: refresh device ids if the system changes
If the system changes, locate PVs that appear on different devices,
and update the device IDs in the devices file.  A system change is
detected by saving the DMI product_uuid or hostname in the devices
file, and comparing it to the current system value.  If a root PV
is restored or copied to a new system with different devices, then
the product_uuid or hostname should change, and trigger lvm to
locate PVIDs from system.devices on new devices.
2023-09-27 15:22:11 -05:00
Zdenek Kabelac
d34d1f0173 debug: trace result failure 2023-09-03 22:03:33 +02:00
Zdenek Kabelac
71ff21f57c gcc: initialize variables 2023-08-23 15:10:40 +02:00
David Teigland
847f1dd99c device_id: rewrite validation of devname entries
The old approach was too complicated and didn't work correctly
in some cases.
2023-08-04 11:45:40 -05:00
Zdenek Kabelac
5ce236a691 gcc: correct signess comparation
Compare int to int and unsigned to unsigned...
2023-07-13 21:31:18 +02:00
David Teigland
228a8e8c1f device_id: ignore leading and trailing spaces for sys_wwid and sys_serial
Leading and trailing underscores are also ignored to handle device ids
written by previous versions which replaced all spaces with underscores.
2023-06-15 15:17:14 -05:00
David Teigland
74feebdab7 device_id: fix handling of non-PV with duplicate serial number
Fix in the code that matches devices to system.devices entries when
the devices have the same serial number.  A non-PV device in
system.devices has no pvid value, and the code was segfaulting
when checking the null pvid value.
2023-06-08 12:24:05 -05:00
David Teigland
4cdb178968 device_id: ignore trailing underscores in t10 wwid from devices file
In previous lvm versions, trailing spaces at the end of a t10 wwid would
be replaced with underscores, so the IDNAME string in system.devices
would look something like "t10.123_".  Current versions of lvm ignore
trailing spaces in a t10 wwid, so the IDNAME string used would be
"t10.123".  The different values would cause lvm to not recognize a
device in system.devices with the trailing _.  Fix this by ignoring
trailing underscores in the IDNAME string from system.devices.
2023-05-19 14:05:10 -05:00
Zdenek Kabelac
c451d7925d cleanup: correcting some log_print
Correcting to log_print_unless_silent(),
so -qq can do some work.
2023-05-06 20:38:49 +02:00
David Teigland
dc99f0def1 device_id: ignore quotes in device id
A t10 wwid string was found containing a " character
which breaks vg metadata parsing.  Ignore any quotation
marks in device id strings.
2023-02-06 12:24:18 -06:00
David Teigland
6613a61d3b device_id: fix segfault verifying serial for non-pv
The recent change that verifies sys_serial system.devices entries
using the PVID did not exclude non-PV devices from being checked.
The verification code would attempt to use du->pvid which was null
for the non-PVs causing a segfault.
2022-12-02 12:25:10 -06:00
David Teigland
a74468116e device_id: check return value of label_read_pvid
for covscan
2022-12-01 11:49:51 -06:00
David Teigland
e71b434663 device_id: _get_devs_with_serial_numbers add missing free
on malloc failure path
2022-12-01 11:43:24 -06:00
David Teigland
7552ed9010 device_id: add null id->name null check
for covscan
2022-12-01 10:38:48 -06:00
David Teigland
c98617c593 devices: factor common list functions
which were duplicated in various places
2022-11-07 11:38:46 -06:00
David Teigland
761b922178 device_id: handle duplicate serial numbers
Handle multiple devices using the same serial number as
their device id.  After matching devices to devices file
entries, if there is a discrepency between the ondisk PVID
and the devices file PVID, then rematch devices to
devices file entries using PVID, looking at all disks
on the system with the same serial number.
2022-11-07 08:56:02 -06:00
David Teigland
bdab36cf3f device_id: look for serial number in other locations
Only /sys/dev/block/major:minor/device/serial was read to find
a disk serial number, but a serial number seems to be reported
more often in other locations, so check these also:
/sys/dev/block/major:minor/device/vpd_pg80
/sys/class/block/vda/serial (for virtio disks only)
2022-11-07 08:56:02 -06:00
David Teigland
f188c9e403 device_id: remove debug trace
for common case where a device id type is not used.
2022-10-24 16:20:28 -05:00
David Teigland
830ece75e8 cmd: save device_id_sysfs_dir
read and save device_id_sysfs_dir to avoid spamming
debug output from find_config_tree_str.
2022-10-24 16:20:28 -05:00
David Teigland
13c63f0cfa lvmdevices: use deviceidtype option strictly
Only use the device id type specified by --deviceidtype,
and fail if that type is not available for the device.
2022-10-10 11:47:29 -05:00
David Teigland
79e67fc5e4 device id: add new types using values from vpd_pg83
The new device_id types are: wwid_naa, wwid_eui, wwid_t10.
The new types use the specific wwid type in their name.
lvm currently gets the values for these types by reading
the device's vpd_pg83 sysfs file (this could change in the
future if better methods become available for reading the
values.)

If a device is added to the devices file using one of these
types, prior versions of lvm will not recognize the types
and will be unable to use the devices.

When adding a new device, lvm continues to first use sys_wwid
from the sysfs wwid file.  If the device has no sysfs wwid file,
lvm now attempts to use one of the new types from vpd_pg83.

If a devices file entry with type sys_wwid does not match a
given device's sysfs wwid file, the sys_wwid value will also
be compared to that device's other wwids from its vpd_pg83 file.
If the kernel changes the wwid type reported from the sysfs
wwid file, e.g. from a device's t10 id to its naa id, then lvm
should still be able to match it correctly using the vpd_pg83
data which will include both ids.
2022-10-10 11:47:29 -05:00
David Teigland
8de87e0207 device id: change space handling in t10 wwid
t10 wwids are now edited in the same way that multipath does,
which is replacing a series of spaces with one _.  Previously
lvm replaced every space with one _.  Devices file entries
with the old form will be converted to the new shorter form.
2022-10-10 11:47:29 -05:00
David Teigland
380ab3f45c device id wwid adjustments
Move the functions handling dev wwids.

Add dev flags indicating that wwids have been read from
sysfs wwid file or sysfs vpd_pg83 file.  This can be
used to avoid rereading these.

Improve filter-mpath search for a device's wwid in
/etc/multipath/wwids, to avoid unnecessary rereading
of wwids from sysfs files.

Type 8 wwids from vpd_pg83 with naa or eui names should be
saved as those types.
2022-10-10 11:47:29 -05:00
David Teigland
0eebd9d780 vgimportdevices: fix locking when creating devices file
Take the devices file lock before creating a new devices file.
(Was missed by the change to preemptively create the devices
file prior to setup_devices(), which was done to improve the
error path.)
2022-08-30 14:52:00 -05:00
David Teigland
8c3cfc75c7 devices file: fix pvcreate --uuid matching pvid entry with no device id
pvcreate with --uuid would segfault if a devices file entry matched
the specified pvid, but the devices file entry had no device_id, which
could happen if the entry has a devname idtype.
2022-08-19 13:34:36 -05:00
David Teigland
3b0f9cec7e filter-mpath: get wwids from sysfs vpd_pg83
to compare with wwids in /etc/multipath/wwids when
excluding multipath components.  The wwid printed
from the sysfs wwid file may not be the wwid used
in multipath wwids.  Save the wwids found for each
device on dev->wwids to avoid repeating reading
and parsing the sysfs files.
2022-06-08 15:06:01 -05:00
David Teigland
bee575d678 devices file: remove extraneous unlock in vgchange -u
vgchange -u exit path was unlocking the devices file in cases
when it wasn't needed, which produced an warning.
2022-04-13 12:19:04 -05:00
David Teigland
fb7698b0ce lvmdevices: --deldev using device id
When used with --deviceidtype, --deldev can specify
a device id to remove.
2022-04-06 12:51:34 -05:00
David Teigland
8db3b11e4e change messages about filtered devices
Change messages that refer to devices being "excluded by filters"
to say just "excluded".  This will avoid mistaking the word
"filters" with the lvm.conf filter setting.
2022-04-01 13:38:21 -05:00
David Teigland
6e22be20c6 devices file: warn about missing multipath entry
Warn if a scsi device is listed in the devices file that
is used by a multipath device that is not listed.  This
will happen if a scsi device is listed in the devices
file and then an mpath device is set up to use it.

The way to correct this would be to remove the devices
file entry for the component device and add a new entry
for the multipath device.
2022-04-01 13:38:21 -05:00
David Teigland
4eb04c8c05 devices: fix dev_name assumptions
dev_name(dev) returns "[unknown]" if there are no names
on dev->aliases.  It's meant mainly for log messages.

Many places assume a valid path name is returned, and
use it directly.  A caller that wants to use the path
from dev_name() must first check if the dev has any
paths with dm_list_empty(&dev->aliases).
2022-02-24 17:22:04 -06:00
David Teigland
00c3069872 devices: initial use of existing option
Use dev_cache_get_existing() in a few common, high level
locations where it's obvious that only existing dev-cache
entries are wanted.  This can be expanded and used in more
locations (or dev_cache_get can stop creating new entries.)
2022-02-24 17:22:03 -06:00
David Teigland
d59382c772 devices file: do not clear PVID of unread devices
In a certain disconnected state, a block device is present on
the system, can be opened, reports a valid size, reports the
correct device id (wwid), and matches a devices file entry.
But, reading the device can still fail.  In this case,
device_ids_validate() was misinterpreting the read error as
the device having no data/label on it (and no PVID).
The validate function would then clear the PVID from the
devices file entry for the device, thinking that it was
fixing the devices file (making it consistent with the on disk
state.)  Fix this by not attempting to check and correct a
devices file entry that cannot be read.  Also make this case
explicit in the hints validation code (which was doing the
right thing but indirectly.)
2022-02-10 14:16:04 -06:00
David Teigland
3fce6a81f8 lvmdevices: make deldev work for missing device 2022-02-03 16:56:03 -06:00
David Teigland
8f50c5e79b lvmdevices: fix checks when adding entries
Removes some incorrect and unnecessary checks for other entries
when adding a new devices.  The removed checks and corrections were
mostly redundant with what is already done by device id matching.
Other checking is reworked so the warnings are a bit different.
2022-01-25 15:18:29 -06:00
David Teigland
9e9f02acf0 device_id: fix search for renamed device when the wwid is ignored
When a device has a wwid (from sysfs), but lvm ignores the wwid,
e.g. because it contains an unreliable "QEMU" value, then lvm
falls back to using IDTYPE=devname (the device name) as the
device id.  If the device name changes after reboot, then lvm
automatically searches for the PV on other devices to find the
new device name and correct system.devices.  When searching for
the PV, lvm skips looking at devices that would use other id types,
e.g. if a device would use a wwid and not a devname, then it
skips checking it.  However, it failed to account for the fact
that a device may have wwid that was ignored, in which case it
should be checked.
2022-01-25 10:47:50 -06:00
David Teigland
a972d63c54 lvmdevices check: error exit if update is needed
. error exit means that lvmdevices --update would make a change.

. remove check of PART field from --check because it isn't used.

. unlink searched_devnames file to ensure check|update will search
2022-01-14 14:59:28 -06:00
David Teigland
ae54e75176 device_id: handle wwid with spaces or control characters
non-standard wwid can be reported from sysfs with spaces/etc.
replace with "_"
2021-12-02 13:33:18 -06:00
David Teigland
d5402e55f6 devices file: don't write in test mode 2021-12-01 10:08:08 -06:00
David Teigland
212b1fc529 devices: exclude multipath components based on matching wwid
If multipath component devices get through the filter and
cause lvm to see duplicate PVs, then check the wwid of the
devs and drop the component devices as if they had been
filtered.  If a dm mpath device was found among the duplicates
then use that as the PV, otherwise do not use any of the
components as the PV.

"duplicate PVs" associated with multipath configs will no
longer stop commands from working.
2021-11-18 17:41:00 -06:00