Messages in this thread |  | | Date | Fri, 30 Aug 2002 18:04:46 -0700 (PDT) | From | Linus Torvalds <> | Subject | Re: [PATCH] Introduce BSD-style user credential [3/3] |
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On 31 Aug 2002, Alan Cox wrote: > > On Sat, 2002-08-31 at 01:49, Linus Torvalds wrote: > > > struct pcred { > > > atomic_t count; > > > uid_t uid, euid, suid; > > > gid_t gid, egid, sgid; > > > struct ucred *cred; > > > kernel_cap_t ... capabilities ... > > > struct user_struct *user; > > > }; > > > > Needs fsuid too, and space for the security LSM modules to attach > private information. SELinux needs a few more credentials than base > kernels!
Note that "fsuid" would _be_ the "struct ucred *" thing (but hopefully renamed: "ucred" is a really bad name, since it has almost nothing to do with the user, and has everything to do with VFS. I don't know where BSD got the "u" from).
Think of "fsuid" and "fsgid" as small special-case "filesystem credentials" already - they're separate from the regular uid/gid because they have different sharing semantics (uid/euid are visible to signals, the FS credentials aren't).
So I dont' think that is a problem.
The issue about attaching additional credential information (both to the user credentials _and_ to the VFS credentials) is true, though.
Linus
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