Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/nfsd/auth.c | |
3 | * | |
4 | * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> | |
5 | */ | |
6 | ||
7 | #include <linux/types.h> | |
8 | #include <linux/sched.h> | |
9 | #include <linux/sunrpc/svc.h> | |
10 | #include <linux/sunrpc/svcauth.h> | |
11 | #include <linux/nfsd/nfsd.h> | |
c7d51402 | 12 | #include <linux/nfsd/export.h> |
a254b246 | 13 | #include "auth.h" |
1da177e4 | 14 | |
c7d51402 | 15 | int nfsexp_flags(struct svc_rqst *rqstp, struct svc_export *exp) |
1269bc69 BF |
16 | { |
17 | struct exp_flavor_info *f; | |
18 | struct exp_flavor_info *end = exp->ex_flavors + exp->ex_nflavors; | |
19 | ||
20 | for (f = exp->ex_flavors; f < end; f++) { | |
21 | if (f->pseudoflavor == rqstp->rq_flavor) | |
22 | return f->flags; | |
23 | } | |
24 | return exp->ex_flags; | |
25 | ||
26 | } | |
27 | ||
1da177e4 LT |
28 | int nfsd_setuser(struct svc_rqst *rqstp, struct svc_export *exp) |
29 | { | |
54cceebb | 30 | struct svc_cred cred = rqstp->rq_cred; |
1da177e4 | 31 | int i; |
1269bc69 | 32 | int flags = nfsexp_flags(rqstp, exp); |
1da177e4 LT |
33 | int ret; |
34 | ||
1269bc69 | 35 | if (flags & NFSEXP_ALLSQUASH) { |
54cceebb N |
36 | cred.cr_uid = exp->ex_anon_uid; |
37 | cred.cr_gid = exp->ex_anon_gid; | |
38 | cred.cr_group_info = groups_alloc(0); | |
1269bc69 | 39 | } else if (flags & NFSEXP_ROOTSQUASH) { |
1da177e4 | 40 | struct group_info *gi; |
54cceebb N |
41 | if (!cred.cr_uid) |
42 | cred.cr_uid = exp->ex_anon_uid; | |
43 | if (!cred.cr_gid) | |
44 | cred.cr_gid = exp->ex_anon_gid; | |
45 | gi = groups_alloc(cred.cr_group_info->ngroups); | |
1da177e4 | 46 | if (gi) |
54cceebb N |
47 | for (i = 0; i < cred.cr_group_info->ngroups; i++) { |
48 | if (!GROUP_AT(cred.cr_group_info, i)) | |
1da177e4 LT |
49 | GROUP_AT(gi, i) = exp->ex_anon_gid; |
50 | else | |
54cceebb | 51 | GROUP_AT(gi, i) = GROUP_AT(cred.cr_group_info, i); |
1da177e4 | 52 | } |
54cceebb N |
53 | cred.cr_group_info = gi; |
54 | } else | |
55 | get_group_info(cred.cr_group_info); | |
1da177e4 | 56 | |
54cceebb N |
57 | if (cred.cr_uid != (uid_t) -1) |
58 | current->fsuid = cred.cr_uid; | |
1da177e4 LT |
59 | else |
60 | current->fsuid = exp->ex_anon_uid; | |
54cceebb N |
61 | if (cred.cr_gid != (gid_t) -1) |
62 | current->fsgid = cred.cr_gid; | |
1da177e4 LT |
63 | else |
64 | current->fsgid = exp->ex_anon_gid; | |
65 | ||
54cceebb | 66 | if (!cred.cr_group_info) |
1da177e4 | 67 | return -ENOMEM; |
54cceebb N |
68 | ret = set_current_groups(cred.cr_group_info); |
69 | put_group_info(cred.cr_group_info); | |
70 | if ((cred.cr_uid)) { | |
e338d263 AM |
71 | current->cap_effective = |
72 | cap_drop_nfsd_set(current->cap_effective); | |
1da177e4 | 73 | } else { |
e338d263 AM |
74 | current->cap_effective = |
75 | cap_raise_nfsd_set(current->cap_effective, | |
76 | current->cap_permitted); | |
1da177e4 LT |
77 | } |
78 | return ret; | |
79 | } |