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auth.c

Version: ~ [ 2.4.0 ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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 }
 62

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Linux Cross Reference Linux/fs/nfsd/auth.c

Linux Cross Reference
Linux/fs/nfsd/auth.c