64 строки
1.6 KiB
C
64 строки
1.6 KiB
C
/*
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* linux/fs/nfsd/auth.c
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*
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* Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
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*/
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#include <linux/types.h>
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#include <linux/sched.h>
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#include <linux/sunrpc/svc.h>
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#include <linux/sunrpc/svcauth.h>
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#include <linux/nfsd/nfsd.h>
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#define CAP_NFSD_MASK (CAP_FS_MASK|CAP_TO_MASK(CAP_SYS_RESOURCE))
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int nfsd_setuser(struct svc_rqst *rqstp, struct svc_export *exp)
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{
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struct svc_cred *cred = &rqstp->rq_cred;
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int i;
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int ret;
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if (exp->ex_flags & NFSEXP_ALLSQUASH) {
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cred->cr_uid = exp->ex_anon_uid;
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cred->cr_gid = exp->ex_anon_gid;
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put_group_info(cred->cr_group_info);
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cred->cr_group_info = groups_alloc(0);
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} else if (exp->ex_flags & NFSEXP_ROOTSQUASH) {
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struct group_info *gi;
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if (!cred->cr_uid)
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cred->cr_uid = exp->ex_anon_uid;
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if (!cred->cr_gid)
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cred->cr_gid = exp->ex_anon_gid;
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gi = groups_alloc(cred->cr_group_info->ngroups);
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if (gi)
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for (i = 0; i < cred->cr_group_info->ngroups; i++) {
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if (!GROUP_AT(cred->cr_group_info, i))
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GROUP_AT(gi, i) = exp->ex_anon_gid;
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else
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GROUP_AT(gi, i) = GROUP_AT(cred->cr_group_info, i);
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}
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put_group_info(cred->cr_group_info);
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cred->cr_group_info = gi;
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}
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if (cred->cr_uid != (uid_t) -1)
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current->fsuid = cred->cr_uid;
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else
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current->fsuid = exp->ex_anon_uid;
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if (cred->cr_gid != (gid_t) -1)
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current->fsgid = cred->cr_gid;
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else
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current->fsgid = exp->ex_anon_gid;
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if (!cred->cr_group_info)
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return -ENOMEM;
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ret = set_current_groups(cred->cr_group_info);
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if ((cred->cr_uid)) {
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cap_t(current->cap_effective) &= ~CAP_NFSD_MASK;
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} else {
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cap_t(current->cap_effective) |= (CAP_NFSD_MASK &
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current->cap_permitted);
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}
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return ret;
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}
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