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54cceebb67
In addition to setting the processes filesystem id's, nfsd_setuser also modifies the value of the rq_cred which stores the id's that originally came from the rpc call, for example to reflect root squashing. There's no real reason to do that--the only case where rqstp->rq_cred is actually used later on is in the NFSv4 SETCLIENTID/SETCLIENTID_CONFIRM operations, and there the results are the opposite of what we want--those two operations don't deal with the filesystem at all, they only record the credentials used with the rpc call for later reference (so that we may require the same credentials be used on later operations), and the credentials shouldn't vary just because there was or wasn't a previous operation in the compound that referred to some export This fixes a bug which caused mounts from Solaris clients to fail. Signed-off-by: Andy Adamson <andros@citi.umich.edu> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
64 lines
1.6 KiB
C
64 lines
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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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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cred.cr_group_info = gi;
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} else
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get_group_info(cred.cr_group_info);
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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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put_group_info(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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