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f83332a0d5
- add DM_UDEV_RULES_VSN to provide a variable to be checked for in the other rules (e.g. to check that DM rules are actually installed, we can alternate functionality in the other rules based on this information, also we have versioning support for the rules) - set proper sbin path for dmsetup and blkid, /sbin first, then /usr/sbin. This is necessary for anaconda to work properly. - add 'last_rule' for cryptsetup's temporary devices (symlinks in /dev/mapper only)
72 lines
3.2 KiB
Plaintext
72 lines
3.2 KiB
Plaintext
# Udev rules for device-mapper devices.
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#
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# These rules create a DM control node in /dev/(DM_DIR) directory.
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# The rules also create nodes named dm-x (x is a number) in /dev
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# directory and symlinks to these nodes with names given by
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# the actual DM names. Some udev environment variables are set
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# for use in later rules:
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# DM_NAME - actual DM device's name
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# DM_UUID - UUID set for DM device (blank if not specified)
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# DM_SUSPENDED - suspended state of DM device (0 or 1)
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# DM_UDEV_RULES_VSN - DM udev rules version
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KERNEL=="device-mapper", NAME="(DM_DIR)/control"
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SUBSYSTEM!="block", GOTO="dm_end"
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KERNEL!="dm-[0-9]*", GOTO="dm_end"
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# Set proper sbin path, /sbin has higher priority than /usr/sbin.
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ENV{DM_SBIN_PATH}="/sbin"
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TEST!="$env{DM_SBIN_PATH}/dmsetup", ENV{DM_SBIN_PATH}="/usr/sbin"
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TEST!="$env{DM_SBIN_PATH}/dmsetup", GOTO="dm_end"
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ACTION!="add|change", GOTO="dm_end"
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# Normally, we operate on "change" events only. But when
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# coldplugging, there's an "add" event present. We have to
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# recognize this and do our actions in this particular
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# situation, too. Also, we don't want the nodes to be
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# created prematurely on "add" events while not coldplugging.
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ACTION=="add", ENV{STARTUP}!="1", NAME="", GOTO="dm_end"
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# "dm" sysfs subdirectory is available in newer versions of DM
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# only (kernels >= 2.6.29). We have to check for its existence
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# and use dmsetup tool instead to get the DM name, uuid and
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# suspended state if the "dm" subdirectory is not present.
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# The "suspended" item was added even later (kernels >= 2.6.31),
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# so we also have to call dmsetup if the kernel version used
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# is in between these releases.
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TEST=="dm", ENV{DM_NAME}="$attr{dm/name}", ENV{DM_UUID}="$attr{dm/uuid}", ENV{DM_SUSPENDED}="$attr{dm/suspended}"
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TEST!="dm", IMPORT{program}="$env{DM_SBIN_PATH}/dmsetup info -j %M -m %m -c --nameprefixes --noheadings --rows -o name,uuid,suspended"
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ENV{DM_SUSPENDED}!="?*", IMPORT{program}="$env{DM_SBIN_PATH}/dmsetup info -j %M -m %m -c --nameprefixes --noheadings --rows -o suspended"
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# dmsetup tool provides suspended state information in textual
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# form with values "Suspended"/"Active". We translate it to
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# 0/1 respectively to be consistent with sysfs values.
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ENV{DM_SUSPENDED}=="Active", ENV{DM_SUSPENDED}="0"
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ENV{DM_SUSPENDED}=="Suspended", ENV{DM_SUSPENDED}="1"
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# This variable provides a reliable way to check that device-mapper
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# rules were installed. It means that all needed variables are set
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# by these rules directly so there's no need to acquire them again
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# later. Other rules can alternate the functionality based on this
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# fact (e.g. fallback to rules that behave correctly even without
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# these rules installed). It also provides versioning for any
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# possible future changes.
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ENV{DM_UDEV_RULES_VSN}="1"
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ENV{DM_NAME}=="?*", NAME="$kernel", SYMLINK+="(DM_DIR)/$env{DM_NAME}"
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# We have to ignore further rule application for temporary
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# cryptsetup devices. But don't forget to send the notification!
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ENV{DM_UUID}=="CRYPT-TEMP-?*", GOTO="dm_last_rule"
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ENV{DM_UUID}!="?*", ENV{DM_NAME}=="temporary-cryptsetup-?*", GOTO="dm_last_rule"
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GOTO="dm_end"
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LABEL="dm_last_rule"
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ENV{DM_COOKIE}=="?*", RUN+="$env{DM_SBIN_PATH}/dmsetup udevcomplete $env{DM_COOKIE}"
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OPTIONS+="last_rule"
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LABEL="dm_end"
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