How does udev get devlink information for kernel device events?
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I understand how the devlinks are created for linux devices by udev via udev rules. The one piece I don't understand is when the kernal emits an event that a particular device went down, how does udev apply the additional information to the event before sending out the udev event (ie the devlinks information)? Does it keep a database of this information somewhere? I have a situation where we have external enclosures containing scsi devices goes down, and a subset of the remove events is missing the devlinks information in the udev event even though the devlink was in place before they went down.
linux udev
asked Nov 30 at 21:22
bieno002
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I understand how the devlinks are created for linux devices by udev via udev rules. The one piece I don't understand is when the kernal emits an event that a particular device went down, how does udev apply the additional information to the event before sending out the udev event (ie the devlinks information)? Does it keep a database of this information somewhere? I have a situation where we have external enclosures containing scsi devices goes down, and a subset of the remove events is missing the devlinks information in the udev event even though the devlink was in place before they went down.
linux udev
asked Nov 30 at 21:22
bieno002
11
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I understand how the devlinks are created for linux devices by udev via udev rules. The one piece I don't understand is when the kernal emits an event that a particular device went down, how does udev apply the additional information to the event before sending out the udev event (ie the devlinks information)? Does it keep a database of this information somewhere? I have a situation where we have external enclosures containing scsi devices goes down, and a subset of the remove events is missing the devlinks information in the udev event even though the devlink was in place before they went down.
linux udev
asked Nov 30 at 21:22
bieno002
11
I understand how the devlinks are created for linux devices by udev via udev rules. The one piece I don't understand is when the kernal emits an event that a particular device went down, how does udev apply the additional information to the event before sending out the udev event (ie the devlinks information)? Does it keep a database of this information somewhere? I have a situation where we have external enclosures containing scsi devices goes down, and a subset of the remove events is missing the devlinks information in the udev event even though the devlink was in place before they went down.
linux udev
linux udev
asked Nov 30 at 21:22
bieno002
11
asked Nov 30 at 21:22
bieno002
11
asked Nov 30 at 21:22
bieno002
11
asked Nov 30 at 21:22
bieno002
11
asked Nov 30 at 21:22
bieno002
11
11
add a comment |
add a comment |
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