| --- | Log | opened Wed Jun 03 00:00:38 2009 |
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| 17:09 | <hacktolive:#uml> | hi all, anyone knows how to create a COW (copy-on-write) for UML? I can't find any info on the internet.... thanks |
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| 17:25 | <bldewolf:#uml> | hacktolive: have you installed the usermode utilities |
| 17:25 | <bldewolf:#uml> | on the host |
| 17:26 | <hacktolive:#uml> | just installed now... but I don't know how to create a COW... |
| 17:26 | <hacktolive:#uml> | is it a raw filesystem? (created with dd?) |
| 17:26 | <hacktolive:#uml> | I'm not familiar with "COW"? |
| 17:27 | <hacktolive:#uml> | what command is used to create one COW-file? |
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| 18:47 | <bldewolf:#uml> | hacktolive: http://user-mode-linux.sourceforge.net/old/shared_fs.html |
| 18:47 | <bldewolf:#uml> | that's kind of out of date though |
| 18:51 | <bldewolf:#uml> | actually no it looks fine, sorry |
| 18:54 | <hacktolive:#uml> | bldewolf, I have read that, thanks, but I'm still a bit confused... the problem is that I'm working with non standard files |
| 18:54 | <hacktolive:#uml> | i am working with mountlo, trying to modify the source, so that I can mount many files at the same time: http://pastebin.com/f3af90d85 |
| 19:01 | <bldewolf:#uml> | I'm not sure what you're trying to do |
| 19:01 | <bldewolf:#uml> | you can mount multiple files as block devices with uml already? |
| 19:03 | <hacktolive:#uml> | I am not working with uml itself, I don't even have a root-filesystem |
| 19:03 | <hacktolive:#uml> | my "ultimate goal" is to be able to mount the same file several times (as non-root user) |
| 19:06 | <hacktolive:#uml> | the problem is that I always get the same errors: |
| 19:06 | <hacktolive:#uml> | --- kernel messages: |
| 19:06 | <hacktolive:#uml> | F_SETLK failed, file already locked by pid 23117 |
| 19:06 | <hacktolive:#uml> | Failed to lock './a.runz', err = 11 |
| 19:06 | <hacktolive:#uml> | Failed to open './a.runz', errno = 11 |
| 19:06 | <hacktolive:#uml> | ubda: Can't open "./a.runz": errno = 11 |
| 19:07 | <hacktolive:#uml> | and I think its UML "fault"... but I'm not sure |
| 19:07 | <bldewolf:#uml> | what does it have to do with UML, then? |
| 19:08 | <hacktolive:#uml> | it uses UML to be able to mount in user-mode (non-root) |
| 19:08 | <hacktolive:#uml> | and I think this error is related to UML... |
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| 19:10 | <bldewolf:#uml> | have you look into something like unionfs-fuse? |
| 19:11 | <bldewolf:#uml> | for doing cow |
| 19:12 | <hacktolive:#uml> | not really... never had considered... but it might be a good idea... |
| 19:14 | <bldewolf:#uml> | I've personally only used the kernel implementions of unionfs, but they seem like a better idea than dragging UML in and hacking something yourself :) |
| 19:15 | <hacktolive:#uml> | hmm.... very good idea indeed... attacking the problem from other angle... clever... thanks... it **might** work after doing some modifications to the code... |
| 19:15 | <bldewolf:#uml> | no problem, good luck |
| 19:19 | <hacktolive:#uml> | thanks... the problem with that is that it is harder to keep track of mounted files... it was just easier to be able to mount the same file many times... but... at least its an idea worth trying! |
| 19:21 | <bldewolf:#uml> | well, I think with unionfs you could mount the base file once, then use that as a read-only part of only unionfs mounts to it |
| 19:26 | <hacktolive:#uml> | yeah, just had an idea how to keep track of it... |
| 19:31 | <hacktolive:#uml> | holy c*ap, the union-fs really works! Know I just have to code it, and add a way to keep track of files... |
| 19:31 | <hacktolive:#uml> | thanks a lot, I really appreciate it! |
| 19:32 | <hacktolive:#uml> | time to go, bye! thanks |
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| --- | Log | closed Thu Jun 04 00:00:42 2009 |
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