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nfs: fix pnfs direct write memory leak

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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.

Cc: stable@vger.kernel.org [v3.4+]
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Peng Tao
2014-11-05 22:36:50 +08:00
committed by Trond Myklebust
parent dca780016d
commit 8c393f9a72
2 changed files with 12 additions and 0 deletions
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11
include/linux/nfs_xdr.h
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@@ -1224,11 +1224,22 @@ 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 */
#ifdef CONFIG_NFS_V4_2