5 Commits

Author	SHA1	Message	Date
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	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
Zdenek Kabelac	b2db01b530	cov: dev-mpath: check config_wwids_file ... Since config_wwids_file is checked for NULL, test is also before calling _read_wwid_file() that is directly dereferencing it.	2021-07-28 00:49:28 +02:00
David Teigland	f8b52f2763	fix multipath component detection for multiple holders ... sysfs-based multipath component detection quit if a device had multiple holders, and in this case would fail to detect a device was an mpath component.	2021-07-13 11:11:23 -05:00
David Teigland	9048565093	devices: rework libudev usage ... related to config settings: obtain_device_info_from_udev (controls if lvm gets a list of devices from readdir /dev or from libudev) external_device_info_source (controls if lvm asks libudev for device information) . Make the obtain_device_list_from_udev setting affect only the choice of readdir /dev vs libudev. The setting no longer controls if udev is used for device type checks. . Change obtain_device_list_from_udev default to 0. This helps avoid boot timeouts due to slow libudev queries, avoids reported failures from udev_enumerate_scan_devices, and avoids delays from "device not initialized in udev database" errors. Even without errors, for a system booting with 1024 PVs, lvm2-pvscan times improve from about 100 sec to 15 sec, and the pvscan command from about 64 sec to about 4 sec. . For external_device_info_source="none", remove all libudev device info queries, and use only lvm native device info. . For external_device_info_source="udev", first check lvm native device info, then check libudev info. . Remove sleep/retry loop when attempting libudev queries for device info. udev info will simply be skipped if it's not immediately available. . Only set up a libdev connection if it will be used by obtain_device_list_from_udev/external_device_info_source. . For native multipath component detection, use /etc/multipath/wwids. If a device has a wwid matching an entry in the wwids file, then it's considered a multipath component. This is necessary to natively detect multipath components when the mpath device is not set up.	2021-07-13 11:11:23 -05:00