None of the existing pNFS layout drivers seem to require the inode
to be locked while they free the layout header.
Signed-off-by: Trond Myklebust <Trond.Myklebust@xxxxxxxxxx>
---
fs/nfs/pnfs.c | 21 +++++++++------------
1 file changed, 9 insertions(+), 12 deletions(-)
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index d4b55bf..c16c805 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -213,7 +213,7 @@ pnfs_free_layout_hdr(struct pnfs_layout_hdr *lo)
}
static void
-destroy_layout_hdr(struct pnfs_layout_hdr *lo)
+pnfs_detach_layout_hdr(struct pnfs_layout_hdr *lo)
{
struct nfs_inode *nfsi = NFS_I(lo->plh_inode);
dprintk("%s: freeing layout cache %p\n", __func__, lo);
@@ -222,14 +222,6 @@ destroy_layout_hdr(struct pnfs_layout_hdr *lo)
/* Reset MDS Threshold I/O counters */
nfsi->write_io = 0;
nfsi->read_io = 0;
- pnfs_free_layout_hdr(lo);
-}
-
-static void
-pnfs_put_layout_hdr_locked(struct pnfs_layout_hdr *lo)
-{
- if (atomic_dec_and_test(&lo->plh_refcount))
- destroy_layout_hdr(lo);
}
void
@@ -238,8 +230,9 @@ pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo)
struct inode *inode = lo->plh_inode;
if (atomic_dec_and_lock(&lo->plh_refcount, &inode->i_lock)) {
- destroy_layout_hdr(lo);
+ pnfs_detach_layout_hdr(lo);
spin_unlock(&inode->i_lock);
+ pnfs_free_layout_hdr(lo);
}
}
@@ -792,8 +785,12 @@ void pnfs_roc_release(struct inode *ino)
spin_lock(&ino->i_lock);
lo = NFS_I(ino)->layout;
lo->plh_block_lgets--;
- pnfs_put_layout_hdr_locked(lo);
- spin_unlock(&ino->i_lock);
+ if (atomic_dec_and_test(&lo->plh_refcount)) {
+ pnfs_detach_layout_hdr(lo);
+ spin_unlock(&ino->i_lock);
+ pnfs_free_layout_hdr(lo);
+ } else
+ spin_unlock(&ino->i_lock);
}
void pnfs_roc_set_barrier(struct inode *ino, u32 barrier)
--
1.7.11.4
--
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