Messages in this thread | | | Date | Wed, 13 Dec 2006 20:19:51 +0100 (MET) | From | Jan Engelhardt <> | Subject | Re: get device from file struct |
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>in fs/read_write.c, the vfs_read function does: > >file->f_op->read(file, buf, count, pos); > >after this call is it possible to determine where the >data is coming from? >e.g., the first hard disk, a pipe or from a socket.
For hard disks: file->f_dentry->d_inode->d_sb->s_bdev gives you the block device in case it is a non-virtual filesystem.
For pipes/sockets I do not know of a may to go from a filp to a struct sock or struct socket.
>If it is a socket we are interested >from which device (eth0, eth1, lo, ...) the data was received.
I do not think that is possible either.
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