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NFSv4.1/pNFS: Fix a race in initiate_file_draining()

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Peng Tao points out that the call to pnfs_mark_matching_lsegs_return()
could race with pnfs_put_lseg(), in which case the layout segment is
cleared, but no layoutreturn will be sent.
Fix is to replace the call to pnfs_mark_matching_lsegs_invalid().

Reported-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Trond Myklebust 2016-01-04 11:28:11 -05:00
parent 10335556c9
commit 4b0934baf9
1 changed files with 1 additions and 4 deletions
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5
fs/nfs/callback_proc.c
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@ -216,11 +216,8 @@ static u32 initiate_file_draining(struct nfs_client *clp,
goto unlock;
}
if (pnfs_mark_matching_lsegs_invalid(lo, &free_me_list,
if (pnfs_mark_matching_lsegs_return(lo, &free_me_list,
&args->cbl_range)) {
pnfs_mark_matching_lsegs_return(lo,
&free_me_list,
&args->cbl_range);
rv = NFS4_OK;
goto unlock;
}