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authorKinglong Mee <kinglongmee@gmail.com>2014-03-29 10:23:47 +0800
committerJ. Bruce Fields <bfields@redhat.com>2014-03-30 10:47:34 -0400
commit2336745e87a646a3dc9570f082b85df519ee523e (patch)
tree70975174a7fe3e0be2f5b07d06590e4190af6865 /fs/nfsd
parenta8a7c6776f8d74780348bef639581421d85a4376 (diff)
downloadop-kernel-dev-2336745e87a646a3dc9570f082b85df519ee523e.zip
op-kernel-dev-2336745e87a646a3dc9570f082b85df519ee523e.tar.gz
NFSD: Clear wcc data between compound ops
Testing NFS4.0 by pynfs, I got some messeages as, "nfsd: inode locked twice during operation." When one compound RPC contains two or more ops that locks the filehandle,the second op will cause the message. As two SETATTR ops, after the first SETATTR, nfsd will not call fh_put() to release current filehandle, it means filehandle have unlocked with fh_post_saved = 1. The second SETATTR find fh_post_saved = 1, and printk the message. v2: introduce helper fh_clear_wcc(). Signed-off-by: Kinglong Mee <kinglongmee@gmail.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd')
-rw-r--r--fs/nfsd/nfs4proc.c2
-rw-r--r--fs/nfsd/nfsfh.h14
2 files changed, 15 insertions, 1 deletions
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index 9c23696..d543222 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -1358,6 +1358,8 @@ nfsd4_proc_compound(struct svc_rqst *rqstp,
goto encode_op;
}
+ fh_clear_wcc(current_fh);
+
/* If op is non-idempotent */
if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
plen = opdesc->op_rsize_bop(rqstp, op);
diff --git a/fs/nfsd/nfsfh.h b/fs/nfsd/nfsfh.h
index 4775bc4..ad67964 100644
--- a/fs/nfsd/nfsfh.h
+++ b/fs/nfsd/nfsfh.h
@@ -133,6 +133,17 @@ fh_init(struct svc_fh *fhp, int maxsize)
#ifdef CONFIG_NFSD_V3
/*
+ * The wcc data stored in current_fh should be cleared
+ * between compound ops.
+ */
+static inline void
+fh_clear_wcc(struct svc_fh *fhp)
+{
+ fhp->fh_post_saved = 0;
+ fhp->fh_pre_saved = 0;
+}
+
+/*
* Fill in the pre_op attr for the wcc data
*/
static inline void
@@ -152,7 +163,8 @@ fill_pre_wcc(struct svc_fh *fhp)
extern void fill_post_wcc(struct svc_fh *);
#else
-#define fill_pre_wcc(ignored)
+#define fh_clear_wcc(ignored)
+#define fill_pre_wcc(ignored)
#define fill_post_wcc(notused)
#endif /* CONFIG_NFSD_V3 */
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