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> | |
12 | ||
13 | #define CAP_NFSD_MASK (CAP_FS_MASK|CAP_TO_MASK(CAP_SYS_RESOURCE)) | |
14 | ||
15 | int nfsd_setuser(struct svc_rqst *rqstp, struct svc_export *exp) | |
16 | { | |
54cceebb | 17 | struct svc_cred cred = rqstp->rq_cred; |
1da177e4 LT |
18 | int i; |
19 | int ret; | |
20 | ||
21 | if (exp->ex_flags & NFSEXP_ALLSQUASH) { | |
54cceebb N |
22 | cred.cr_uid = exp->ex_anon_uid; |
23 | cred.cr_gid = exp->ex_anon_gid; | |
24 | cred.cr_group_info = groups_alloc(0); | |
1da177e4 LT |
25 | } else if (exp->ex_flags & NFSEXP_ROOTSQUASH) { |
26 | struct group_info *gi; | |
54cceebb N |
27 | if (!cred.cr_uid) |
28 | cred.cr_uid = exp->ex_anon_uid; | |
29 | if (!cred.cr_gid) | |
30 | cred.cr_gid = exp->ex_anon_gid; | |
31 | gi = groups_alloc(cred.cr_group_info->ngroups); | |
1da177e4 | 32 | if (gi) |
54cceebb N |
33 | for (i = 0; i < cred.cr_group_info->ngroups; i++) { |
34 | if (!GROUP_AT(cred.cr_group_info, i)) | |
1da177e4 LT |
35 | GROUP_AT(gi, i) = exp->ex_anon_gid; |
36 | else | |
54cceebb | 37 | GROUP_AT(gi, i) = GROUP_AT(cred.cr_group_info, i); |
1da177e4 | 38 | } |
54cceebb N |
39 | cred.cr_group_info = gi; |
40 | } else | |
41 | get_group_info(cred.cr_group_info); | |
1da177e4 | 42 | |
54cceebb N |
43 | if (cred.cr_uid != (uid_t) -1) |
44 | current->fsuid = cred.cr_uid; | |
1da177e4 LT |
45 | else |
46 | current->fsuid = exp->ex_anon_uid; | |
54cceebb N |
47 | if (cred.cr_gid != (gid_t) -1) |
48 | current->fsgid = cred.cr_gid; | |
1da177e4 LT |
49 | else |
50 | current->fsgid = exp->ex_anon_gid; | |
51 | ||
54cceebb | 52 | if (!cred.cr_group_info) |
1da177e4 | 53 | return -ENOMEM; |
54cceebb N |
54 | ret = set_current_groups(cred.cr_group_info); |
55 | put_group_info(cred.cr_group_info); | |
56 | if ((cred.cr_uid)) { | |
1da177e4 LT |
57 | cap_t(current->cap_effective) &= ~CAP_NFSD_MASK; |
58 | } else { | |
59 | cap_t(current->cap_effective) |= (CAP_NFSD_MASK & | |
60 | current->cap_permitted); | |
61 | } | |
62 | return ret; | |
63 | } |