2913d9df16
The watch option to udev tells udev to watch our mdadm device file for close events and on a close it rechecks the device. This means that if, for example, we use mdadm to --grow the array from a 4 disk to 5 disk array, when mdadm closes the array, udev will re-read the superblock and update its internal database with the new information. This can also be used to cause udev to create new device special files if, for example, a partitioning program is used to modify the partition table on the actual md device and that program does not call the syscall to reread the partition table. Signed-off-by: Doug Ledford <dledford@redhat.com>
40 lines
1.9 KiB
Plaintext
40 lines
1.9 KiB
Plaintext
# do not edit this file, it will be overwritten on update
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SUBSYSTEM!="block", GOTO="md_end"
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# handle potential components of arrays
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ENV{ID_FS_TYPE}=="linux_raid_member", ACTION=="remove", RUN+="/sbin/mdadm -If $name"
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ENV{ID_FS_TYPE}=="linux_raid_member", ACTION=="add", RUN+="/sbin/mdadm --incremental $env{DEVNAME}"
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# handle md arrays
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ACTION!="add|change", GOTO="md_end"
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KERNEL!="md*", GOTO="md_end"
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# partitions have no md/{array_state,metadata_version}, but should not
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# for that reason be ignored.
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ENV{DEVTYPE}=="partition", GOTO="md_ignore_state"
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# container devices have a metadata version of e.g. 'external:ddf' and
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# never leave state 'inactive'
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ATTR{md/metadata_version}=="external:[A-Za-z]*", ATTR{md/array_state}=="inactive", GOTO="md_ignore_state"
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TEST!="md/array_state", GOTO="md_end"
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ATTR{md/array_state}=="|clear|inactive", GOTO="md_end"
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LABEL="md_ignore_state"
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IMPORT{program}="/sbin/mdadm --detail --export $tempnode"
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ENV{DEVTYPE}=="disk", ENV{MD_NAME}=="?*", SYMLINK+="disk/by-id/md-name-$env{MD_NAME}", OPTIONS+="string_escape=replace"
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ENV{DEVTYPE}=="disk", ENV{MD_UUID}=="?*", SYMLINK+="disk/by-id/md-uuid-$env{MD_UUID}"
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ENV{DEVTYPE}=="disk", ENV{MD_DEVNAME}=="?*", SYMLINK+="md/$env{MD_DEVNAME}"
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ENV{DEVTYPE}=="partition", ENV{MD_NAME}=="?*", SYMLINK+="disk/by-id/md-name-$env{MD_NAME}-part%n", OPTIONS+="string_escape=replace"
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ENV{DEVTYPE}=="partition", ENV{MD_UUID}=="?*", SYMLINK+="disk/by-id/md-uuid-$env{MD_UUID}-part%n"
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ENV{DEVTYPE}=="partition", ENV{MD_DEVNAME}=="*[^0-9]", SYMLINK+="md/$env{MD_DEVNAME}%n"
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ENV{DEVTYPE}=="partition", ENV{MD_DEVNAME}=="*[0-9]", SYMLINK+="md/$env{MD_DEVNAME}p%n"
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IMPORT{program}="/sbin/blkid -o udev -p $tempnode"
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OPTIONS+="link_priority=100"
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OPTIONS+="watch"
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ENV{ID_FS_USAGE}=="filesystem|other|crypto", ENV{ID_FS_UUID_ENC}=="?*", SYMLINK+="disk/by-uuid/$env{ID_FS_UUID_ENC}"
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ENV{ID_FS_USAGE}=="filesystem|other", ENV{ID_FS_LABEL_ENC}=="?*", SYMLINK+="disk/by-label/$env{ID_FS_LABEL_ENC}"
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LABEL="md_end"
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