Messages in this thread | | | Date | Fri, 03 Sep 2004 14:12:21 +0200 | From | Kristian Sørensen <> | Subject | Getting full path from dentry in LSM hooks |
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Hi!
I have a short question, concerning how to get the full path of a file from a LSM hook.
- If the "file" of the dentry is located in the root filesystem: no problem - simply traverse the dentrys, to generate the path.
- If the "file" is mounted from another partition, you do not get the full path by traversing the dentrys.
Example: If we have a system with a normal root (/) and a seperate boot partition (mounted on /boot :). In the LSM hook inode_permission, you get the arguments (struct inode *inode, int mask, struct nameidata *nd). Finding the path, we traverse the dentrys from (nd->dentry). But if the inode is a file in /boot we only get the filename (e.g. kernel-2.6.8.1 instead of /boot/kernel-2.6.8.1)
Can some one reveal the trick to get the full path nomater if the filesystem is root or mounted elsewhere in the filesystem?
Best regards, Kristian Sørensen. The Umbrella Project -- http://umbrella.sf.net - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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