Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=1269bc69b6649282091bb7007372acf4ab8357fd
Commit: 1269bc69b6649282091bb7007372acf4ab8357fd
Parent: 9091224f3cff4721f295df29e8a99705a63bc4c7
Author: J. Bruce Fields <[EMAIL PROTECTED]>
AuthorDate: Tue Jul 17 04:04:52 2007 -0700
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Tue Jul 17 10:23:08 2007 -0700
knfsd: nfsd: enforce per-flavor id squashing
Allow root squashing to vary per-pseudoflavor, so that you can (for example)
allow root access only when sufficiently strong security is in use.
Signed-off-by: "J. Bruce Fields" <[EMAIL PROTECTED]>
Signed-off-by: Neil Brown <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
fs/nfsd/auth.c | 18 ++++++++++++++++--
include/linux/nfsd/export.h | 3 ++-
2 files changed, 18 insertions(+), 3 deletions(-)
diff --git a/fs/nfsd/auth.c b/fs/nfsd/auth.c
index 6e92b0f..cf61dc8 100644
--- a/fs/nfsd/auth.c
+++ b/fs/nfsd/auth.c
@@ -12,17 +12,31 @@
#define CAP_NFSD_MASK (CAP_FS_MASK|CAP_TO_MASK(CAP_SYS_RESOURCE))
+static int nfsexp_flags(struct svc_rqst *rqstp, struct svc_export *exp)
+{
+ struct exp_flavor_info *f;
+ struct exp_flavor_info *end = exp->ex_flavors + exp->ex_nflavors;
+
+ for (f = exp->ex_flavors; f < end; f++) {
+ if (f->pseudoflavor == rqstp->rq_flavor)
+ return f->flags;
+ }
+ return exp->ex_flags;
+
+}
+
int nfsd_setuser(struct svc_rqst *rqstp, struct svc_export *exp)
{
struct svc_cred cred = rqstp->rq_cred;
int i;
+ int flags = nfsexp_flags(rqstp, exp);
int ret;
- if (exp->ex_flags & NFSEXP_ALLSQUASH) {
+ if (flags & NFSEXP_ALLSQUASH) {
cred.cr_uid = exp->ex_anon_uid;
cred.cr_gid = exp->ex_anon_gid;
cred.cr_group_info = groups_alloc(0);
- } else if (exp->ex_flags & NFSEXP_ROOTSQUASH) {
+ } else if (flags & NFSEXP_ROOTSQUASH) {
struct group_info *gi;
if (!cred.cr_uid)
cred.cr_uid = exp->ex_anon_uid;
diff --git a/include/linux/nfsd/export.h b/include/linux/nfsd/export.h
index a01f775..78feb7b 100644
--- a/include/linux/nfsd/export.h
+++ b/include/linux/nfsd/export.h
@@ -43,7 +43,8 @@
#define NFSEXP_ALLFLAGS 0xFE3F
/* The flags that may vary depending on security flavor: */
-#define NFSEXP_SECINFO_FLAGS 0
+#define NFSEXP_SECINFO_FLAGS (NFSEXP_READONLY | NFSEXP_ROOTSQUASH \
+ | NFSEXP_ALLSQUASH)
#ifdef __KERNEL__
-
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