lvm2/udev/13-dm-disk.rules.in

# Copyright (C) 2009 Red Hat, Inc. All rights reserved.
#
# This file is part of LVM2.

# Udev rules for device-mapper devices.
#
# These rules create symlinks in /dev/disk directory.
# Symlinks that depend on probing filesystem type,
# label and uuid are created only if the device is not
# suspended.

# "add" event is processed on coldplug only!
ACTION!="add|change", GOTO="dm_end"
ENV{DM_UDEV_RULES_VSN}!="?*", GOTO="dm_end"
ENV{DM_UDEV_DISABLE_DISK_RULES_FLAG}=="1", GOTO="dm_end"

SYMLINK+="disk/by-id/dm-name-$env{DM_NAME}"
ENV{DM_UUID}=="?*", SYMLINK+="disk/by-id/dm-uuid-$env{DM_UUID}"

ENV{DM_SUSPENDED}=="1", GOTO="dm_end"

(BLKID_RULE)
ENV{DM_UDEV_LOW_PRIORITY_FLAG}=="1", OPTIONS="link_priority=-100"
ENV{ID_FS_USAGE}=="filesystem|other|crypto", ENV{ID_FS_UUID_ENC}=="?*", SYMLINK+="disk/by-uuid/$env{ID_FS_UUID_ENC}"
ENV{ID_FS_USAGE}=="filesystem|other", ENV{ID_FS_LABEL_ENC}=="?*", SYMLINK+="disk/by-label/$env{ID_FS_LABEL_ENC}"

# Add inotify watch to track changes on this device.
# Using the watch rule is not optimal - it generates a lot of spurious
# and useless events whenever the device opened for read-write is closed.
# The best would be to generete the event directly in the tool changing
# relevant information so only relevant events will be processed
# (like creating a filesystem, changing filesystem label etc.).
#
# But let's use this until we have something better...

OPTIONS+="watch"

LABEL="dm_end"
add copyright lines 2009-10-27 01:42:07 +03:00			`# Copyright (C) 2009 Red Hat, Inc. All rights reserved.`
			`#`
			`# This file is part of LVM2.`

Add default udev rules. Update dm-ioctl.h comments. 2009-08-03 22:44:54 +04:00			`# Udev rules for device-mapper devices.`
			`#`
			`# These rules create symlinks in /dev/disk directory.`
			`# Symlinks that depend on probing filesystem type,`
			`# label and uuid are created only if the device is not`
			`# suspended.`

Use udev flags in the rules and cleanup the rules: - remove default permissions set in 95-dm-notify.rules (and add a hint in 12-dm-permissions.rules to set it by the user directly) - add multipath DM_ACTION=="PATH_FAILED" filter - remove unnecessary filters in the headers of the rules (we can simply use DM_UDEV_RULES_VSN instead) - fix symlink priorities in /dev/disk/ (snapshot volumes have low priority for FS UUID symlinks so it will not overwrite symlinks for the origin) 2009-10-22 17:11:33 +04:00			`# "add" event is processed on coldplug only!`
Remove 'last_rule' from udev rules. 'last_rule' option has been removed from udev (version >= 147). From now on, we require foreign rules to check and honor ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG} instead. Foreign rules should be skipped totally when this flag is set. 2009-11-13 15:33:27 +03:00			`ACTION!="add\|change", GOTO="dm_end"`
			`ENV{DM_UDEV_RULES_VSN}!="?*", GOTO="dm_end"`
			`ENV{DM_UDEV_DISABLE_DISK_RULES_FLAG}=="1", GOTO="dm_end"`
Add default udev rules. Update dm-ioctl.h comments. 2009-08-03 22:44:54 +04:00
			`SYMLINK+="disk/by-id/dm-name-$env{DM_NAME}"`
			`ENV{DM_UUID}=="?*", SYMLINK+="disk/by-id/dm-uuid-$env{DM_UUID}"`

Remove 'last_rule' from udev rules. 'last_rule' option has been removed from udev (version >= 147). From now on, we require foreign rules to check and honor ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG} instead. Foreign rules should be skipped totally when this flag is set. 2009-11-13 15:33:27 +03:00			`ENV{DM_SUSPENDED}=="1", GOTO="dm_end"`
Add default udev rules. Update dm-ioctl.h comments. 2009-08-03 22:44:54 +04:00
Call built-in blkid conditionaly (udev version >= 176), call standard blkid with full path otherwise. 2012-02-20 23:38:40 +04:00			`(BLKID_RULE)`
Use udev flags in the rules and cleanup the rules: - remove default permissions set in 95-dm-notify.rules (and add a hint in 12-dm-permissions.rules to set it by the user directly) - add multipath DM_ACTION=="PATH_FAILED" filter - remove unnecessary filters in the headers of the rules (we can simply use DM_UDEV_RULES_VSN instead) - fix symlink priorities in /dev/disk/ (snapshot volumes have low priority for FS UUID symlinks so it will not overwrite symlinks for the origin) 2009-10-22 17:11:33 +04:00			`ENV{DM_UDEV_LOW_PRIORITY_FLAG}=="1", OPTIONS="link_priority=-100"`
Add default udev rules. Update dm-ioctl.h comments. 2009-08-03 22:44:54 +04:00			`ENV{ID_FS_USAGE}=="filesystem\|other\|crypto", ENV{ID_FS_UUID_ENC}=="?*", SYMLINK+="disk/by-uuid/$env{ID_FS_UUID_ENC}"`
			`ENV{ID_FS_USAGE}=="filesystem\|other", ENV{ID_FS_LABEL_ENC}=="?*", SYMLINK+="disk/by-label/$env{ID_FS_LABEL_ENC}"`

Add watch rule to 13-dm-disk.rules. We don't have anything better yet... The problems the watch rule caused when removing devices should be covered now with the "retry remove" logic. It's also better to have this maintained by us, rather than having this rule anywhere else without proper control. 2012-02-15 18:50:33 +04:00			`# Add inotify watch to track changes on this device.`
typo 2012-02-15 19:10:31 +04:00			`# Using the watch rule is not optimal - it generates a lot of spurious`
Add watch rule to 13-dm-disk.rules. We don't have anything better yet... The problems the watch rule caused when removing devices should be covered now with the "retry remove" logic. It's also better to have this maintained by us, rather than having this rule anywhere else without proper control. 2012-02-15 18:50:33 +04:00			`# and useless events whenever the device opened for read-write is closed.`
			`# The best would be to generete the event directly in the tool changing`
			`# relevant information so only relevant events will be processed`
			`# (like creating a filesystem, changing filesystem label etc.).`
			`#`
			`# But let's use this until we have something better...`

			`OPTIONS+="watch"`

Add default udev rules. Update dm-ioctl.h comments. 2009-08-03 22:44:54 +04:00			`LABEL="dm_end"`