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houqp
n00b
Joined: 22 Feb 2011
Posts: 28
Location: China
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 Posted: Thu Mar 24, 2011 3:56 pm Post subject: How can I know what is using a specific module? |
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Hi all,
I am currently playing with a kernel module but find myself cannot successfully remove it:
| Code: | gentoo-tpm tmp # rmmod cipherflt
ERROR: Module cipherflt is in use |
I tried the command lsmod:
| Code: | gentoo-tpm tmp # lsmod |grep cipherflt
cipherflt 11705 1
redirfs 42644 1 cipherflt,[permanent] |
It only tell me that there is something using that cipherflt module, but I cannot find out what is that. So I cannot use rmmod to remove cipherflt.
Are there other tools that I can use to get more information about the loaded module?
Thanks |
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roarinelk
Guru
Joined: 04 Mar 2004
Posts: 520
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| Posted: Thu Mar 24, 2011 4:12 pm Post subject: |
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| it's all here: cipherflt is used by redirfs (which cannot be unloaded, hence "permanent" marker) |
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Veldrin
Veteran
Joined: 27 Jul 2004
Posts: 1945
Location: Zurich, Switzerland
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| Posted: Thu Mar 24, 2011 6:16 pm Post subject: |
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actually it is the other way around...
cipherflt depends on redirfs - which cannot be removed.
as for the original question - i do not know.
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roarinelk
Guru
Joined: 04 Mar 2004
Posts: 520
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| Posted: Thu Mar 24, 2011 7:11 pm Post subject: |
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Judging from the name and what I read about RedirFS, cipherflt seems to be a
crypto "filter" module for redirfs. Do you have any volumes encrypted without
LVM/LUKS/other std. kernel infrastructure? |
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houqp
n00b
Joined: 22 Feb 2011
Posts: 28
Location: China
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| Posted: Fri Mar 25, 2011 3:26 am Post subject: |
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| roarinelk wrote: | Judging from the name and what I read about RedirFS, cipherflt seems to be a
crypto "filter" module for redirfs. Do you have any volumes encrypted without
LVM/LUKS/other std. kernel infrastructure? |
Yes, you are right. I actually, I don't have any volumes encrypted. I just apply the filter to a specific directory.
Thanks,
Houqp |
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houqp
n00b
Joined: 22 Feb 2011
Posts: 28
Location: China
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| Posted: Fri Mar 25, 2011 3:28 am Post subject: |
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| Veldrin wrote: | actually it is the other way around...
cipherflt depends on redirfs - which cannot be removed.
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I see, so the problem is redirfs. I suspect it is also used by redirfs .
Regards,
Houqp |
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