In a process context kernel_read returns -EINTR, how to proceed?
levonshe at yandex.com
Fri Dec 21 08:51:29 EST 2018
I need to read file inside LSM hook and I can not do it in user space
I forgot o mention that same error occurried both in 4.4 and 4.13 kernels
What alternative you can recommend to read file in kernel and avoid -EINTR?
Is vfs_read() different from kernel_read() ?
20.12.2018, 23:09, "valdis.kletnieks at vt.edu" <valdis.kletnieks at vt.edu>:
> On Thu, 20 Dec 2018 13:33:09 +0300, Lev Olshvang said:
>> I use kernel_read to read file in chunks of 4K size in a process context
>> On several files, like libc, libm, I got -EINTR error.
> What are you trying to accomplish? This is not a recommended way to do things.
>> I do not understand who may interrupt such a small read, I suppose these
>> libraries are already mapped in other processes so no real I/O should be done.
> That should be a hint....
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