]>
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 | { | |
17 | struct svc_cred *cred = &rqstp->rq_cred; | |
18 | int i; | |
19 | int ret; | |
20 | ||
21 | if (exp->ex_flags & NFSEXP_ALLSQUASH) { | |
22 | cred->cr_uid = exp->ex_anon_uid; | |
23 | cred->cr_gid = exp->ex_anon_gid; | |
24 | put_group_info(cred->cr_group_info); | |
25 | cred->cr_group_info = groups_alloc(0); | |
26 | } else if (exp->ex_flags & NFSEXP_ROOTSQUASH) { | |
27 | struct group_info *gi; | |
28 | if (!cred->cr_uid) | |
29 | cred->cr_uid = exp->ex_anon_uid; | |
30 | if (!cred->cr_gid) | |
31 | cred->cr_gid = exp->ex_anon_gid; | |
32 | gi = groups_alloc(cred->cr_group_info->ngroups); | |
33 | if (gi) | |
34 | for (i = 0; i < cred->cr_group_info->ngroups; i++) { | |
35 | if (!GROUP_AT(cred->cr_group_info, i)) | |
36 | GROUP_AT(gi, i) = exp->ex_anon_gid; | |
37 | else | |
38 | GROUP_AT(gi, i) = GROUP_AT(cred->cr_group_info, i); | |
39 | } | |
40 | put_group_info(cred->cr_group_info); | |
41 | cred->cr_group_info = gi; | |
42 | } | |
43 | ||
44 | if (cred->cr_uid != (uid_t) -1) | |
45 | current->fsuid = cred->cr_uid; | |
46 | else | |
47 | current->fsuid = exp->ex_anon_uid; | |
48 | if (cred->cr_gid != (gid_t) -1) | |
49 | current->fsgid = cred->cr_gid; | |
50 | else | |
51 | current->fsgid = exp->ex_anon_gid; | |
52 | ||
53 | if (!cred->cr_group_info) | |
54 | return -ENOMEM; | |
55 | ret = set_current_groups(cred->cr_group_info); | |
56 | if ((cred->cr_uid)) { | |
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 | } |