auth.c

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    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 void
   15 nfsd_setuser(struct svc_rqst *rqstp, struct svc_export *exp)
   16 {
   17         struct svc_cred *cred = &rqstp->rq_cred;
   18         int             i;
   19 
   20         if (rqstp->rq_userset)
   21                 return;
   22 
   23         if (exp->ex_flags & NFSEXP_ALLSQUASH) {
   24                 cred->cr_uid = exp->ex_anon_uid;
   25                 cred->cr_gid = exp->ex_anon_gid;
   26                 cred->cr_groups[0] = NOGROUP;
   27         } else if (exp->ex_flags & NFSEXP_ROOTSQUASH) {
   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                 for (i = 0; i < NGROUPS; i++)
   33                         if (!cred->cr_groups[i])
   34                                 cred->cr_groups[i] = exp->ex_anon_gid;
   35         }
   36 
   37         if (cred->cr_uid != (uid_t) -1)
   38                 current->fsuid = cred->cr_uid;
   39         else
   40                 current->fsuid = exp->ex_anon_uid;
   41         if (cred->cr_gid != (gid_t) -1)
   42                 current->fsgid = cred->cr_gid;
   43         else
   44                 current->fsgid = exp->ex_anon_gid;
   45         for (i = 0; i < NGROUPS; i++) {
   46                 gid_t group = cred->cr_groups[i];
   47                 if (group == (gid_t) NOGROUP)
   48                         break;
   49                 current->groups[i] = group;
   50         }
   51         current->ngroups = i;
   52 
   53         if ((cred->cr_uid)) {
   54                 cap_t(current->cap_effective) &= ~CAP_NFSD_MASK;
   55         } else {
   56                 cap_t(current->cap_effective) |= (CAP_NFSD_MASK &
   57                                                   current->cap_permitted);
   58         }
   59 
   60         rqstp->rq_userset = 1;
   61 }

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FreeBSD/Linux Kernel Cross Reference sys/fs/nfsd/auth.c

FreeBSD/Linux Kernel Cross Reference
sys/fs/nfsd/auth.c