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authorNeil Brown <neilb@suse.de>2007-09-05 17:22:13 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-09-10 18:57:47 -0700
commitb8da0d1c27f144bce999c653467106f3f0d5a308 (patch)
treeeedc2f54d8dd6768b953b4d9e1b6075b62fc21ad
parenta1033be72cdb053e182bb41e302a1c11e72b68bb (diff)
downloadlinux-linaro-b8da0d1c27f144bce999c653467106f3f0d5a308.tar.gz
knfsd: Validate filehandle type in fsid_source
fsid_source decided where to get the 'fsid' number to return for a GETATTR based on the type of filehandle. It can be from the device, from the fsid, or from the UUID. It is possible for the filehandle to be inconsistent with the export information, so make sure the export information actually has the info implied by the value returned by fsid_source. Signed-off-by: Neil Brown <neilb@suse.de> Cc: "Luiz Fernando N. Capitulino" <lcapitulino@gmail.com> Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/nfsd/nfsfh.c20
1 files changed, 15 insertions, 5 deletions
diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c
index 0eb464a39aa..7011d62acfc 100644
--- a/fs/nfsd/nfsfh.c
+++ b/fs/nfsd/nfsfh.c
@@ -566,13 +566,23 @@ enum fsid_source fsid_source(struct svc_fh *fhp)
case FSID_DEV:
case FSID_ENCODE_DEV:
case FSID_MAJOR_MINOR:
- return FSIDSOURCE_DEV;
+ if (fhp->fh_export->ex_dentry->d_inode->i_sb->s_type->fs_flags
+ & FS_REQUIRES_DEV)
+ return FSIDSOURCE_DEV;
+ break;
case FSID_NUM:
- return FSIDSOURCE_FSID;
- default:
if (fhp->fh_export->ex_flags & NFSEXP_FSID)
return FSIDSOURCE_FSID;
- else
- return FSIDSOURCE_UUID;
+ break;
+ default:
+ break;
}
+ /* either a UUID type filehandle, or the filehandle doesn't
+ * match the export.
+ */
+ if (fhp->fh_export->ex_flags & NFSEXP_FSID)
+ return FSIDSOURCE_FSID;
+ if (fhp->fh_export->ex_uuid)
+ return FSIDSOURCE_UUID;
+ return FSIDSOURCE_DEV;
}