Name
vfs_permission —
check for access rights to a given path
Synopsis
int vfs_permission (struct nameidata * nd, int mask);
Arguments
nd
lookup result that describes the path
mask
right to check for (MAY_READ, MAY_WRITE, MAY_EXEC)
Description
Used to check for read/write/execute permissions on a path.
We use “fsuid” for this, letting us set arbitrary permissions
for filesystem access without changing the “normal” uids which
are used for other things.