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| author | Trond Myklebust <trond.myklebust@primarydata.com> | 2016-10-17 17:54:32 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-01-09 08:32:24 +0100 |
| commit | 24b049fa0cd93e9e3e4166de8937b197b101a585 (patch) | |
| tree | c90752302bc1e884eb4319ce62aee5bb46eed619 /fs/nfs | |
| parent | b775b86a5fe8f45500ce027a60ca0f1e1f49a13e (diff) | |
| download | linux-stable-24b049fa0cd93e9e3e4166de8937b197b101a585.tar.gz linux-stable-24b049fa0cd93e9e3e4166de8937b197b101a585.tar.bz2 linux-stable-24b049fa0cd93e9e3e4166de8937b197b101a585.zip | |
pNFS: On error, do not send LAYOUTGET until the LAYOUTRETURN has completed
commit 6604b203fb6394ed1f24c21bfa3c207e5ae8e461 upstream.
If there is an I/O error, we should not call LAYOUTGET until the
LAYOUTRETURN that reports the error is complete.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/nfs')
| -rw-r--r-- | fs/nfs/pnfs.c | 6 | ||||
| -rw-r--r-- | fs/nfs/pnfs.h | 1 |
2 files changed, 6 insertions, 1 deletions
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index 259ef85f435a..d3eb4d7f0cbc 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -944,6 +944,7 @@ static void pnfs_clear_layoutcommit(struct inode *inode, void pnfs_clear_layoutreturn_waitbit(struct pnfs_layout_hdr *lo) { clear_bit_unlock(NFS_LAYOUT_RETURN, &lo->plh_flags); + clear_bit(NFS_LAYOUT_RETURN_LOCK, &lo->plh_flags); smp_mb__after_atomic(); wake_up_bit(&lo->plh_flags, NFS_LAYOUT_RETURN); rpc_wake_up(&NFS_SERVER(lo->plh_inode)->roc_rpcwaitq); @@ -957,8 +958,9 @@ pnfs_prepare_layoutreturn(struct pnfs_layout_hdr *lo, /* Serialise LAYOUTGET/LAYOUTRETURN */ if (atomic_read(&lo->plh_outstanding) != 0) return false; - if (test_and_set_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) + if (test_and_set_bit(NFS_LAYOUT_RETURN_LOCK, &lo->plh_flags)) return false; + set_bit(NFS_LAYOUT_RETURN, &lo->plh_flags); pnfs_get_layout_hdr(lo); if (test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags)) { if (stateid != NULL) { @@ -1950,6 +1952,8 @@ void pnfs_error_mark_layout_for_return(struct inode *inode, spin_lock(&inode->i_lock); pnfs_set_plh_return_info(lo, range.iomode, 0); + /* Block LAYOUTGET */ + set_bit(NFS_LAYOUT_RETURN, &lo->plh_flags); /* * mark all matching lsegs so that we are sure to have no live * segments at hand when sending layoutreturn. See pnfs_put_lseg() diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h index 5c295512c967..44cad8afda0e 100644 --- a/fs/nfs/pnfs.h +++ b/fs/nfs/pnfs.h @@ -96,6 +96,7 @@ enum { NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */ NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */ NFS_LAYOUT_RETURN, /* layoutreturn in progress */ + NFS_LAYOUT_RETURN_LOCK, /* Serialise layoutreturn */ NFS_LAYOUT_RETURN_REQUESTED, /* Return this layout ASAP */ NFS_LAYOUT_INVALID_STID, /* layout stateid id is invalid */ NFS_LAYOUT_FIRST_LAYOUTGET, /* Serialize first layoutget */ |