From 25e26c3e8b6c7921a8d44017b61d989dbe4e8649 Mon Sep 17 00:00:00 2001 From: Peng Tao Date: Wed, 5 Nov 2014 22:36:50 +0800 Subject: [PATCH] nfs: fix pnfs direct write memory leak commit 8c393f9a721c30a030049a680e1bf896669bb279 upstream. For pNFS direct writes, layout driver may dynamically allocate ds_cinfo.buckets. So we need to take care to free them when freeing dreq. Ideally this needs to be done inside layout driver where ds_cinfo.buckets are allocated. But buckets are attached to dreq and reused across LD IO iterations. So I feel it's OK to free them in the generic layer. Signed-off-by: Peng Tao Signed-off-by: Trond Myklebust Signed-off-by: Greg Kroah-Hartman --- fs/nfs/direct.c | 1 + include/linux/nfs_xdr.h | 11 +++++++++++ 2 files changed, 12 insertions(+) diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c index b8797ae..de2543d 100644 --- a/fs/nfs/direct.c +++ b/fs/nfs/direct.c @@ -178,6 +178,7 @@ static void nfs_direct_req_free(struct kref *kref) { struct nfs_direct_req *dreq = container_of(kref, struct nfs_direct_req, kref); + nfs_free_pnfs_ds_cinfo(&dreq->ds_cinfo); if (dreq->l_ctx != NULL) nfs_put_lock_context(dreq->l_ctx); if (dreq->ctx != NULL) diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h index 5624e4e..53988cb 100644 --- a/include/linux/nfs_xdr.h +++ b/include/linux/nfs_xdr.h @@ -1247,11 +1247,22 @@ struct nfs41_free_stateid_res { unsigned int status; }; +static inline void +nfs_free_pnfs_ds_cinfo(struct pnfs_ds_commit_info *cinfo) +{ + kfree(cinfo->buckets); +} + #else struct pnfs_ds_commit_info { }; +static inline void +nfs_free_pnfs_ds_cinfo(struct pnfs_ds_commit_info *cinfo) +{ +} + #endif /* CONFIG_NFS_V4_1 */ struct nfs_page; -- 2.7.4