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-rw-r--r--fs/nfs/pnfs.c26
1 files changed, 23 insertions, 3 deletions
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index ee73d9a..baf7353 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -29,6 +29,7 @@
#include <linux/nfs_fs.h>
#include <linux/nfs_page.h>
+#include <linux/module.h>
#include "internal.h"
#include "pnfs.h"
#include "iostat.h"
@@ -1443,17 +1444,31 @@ pnfs_layoutcommit_inode(struct inode *inode, bool sync)
/* Note kzalloc ensures data->res.seq_res.sr_slot == NULL */
data = kzalloc(sizeof(*data), GFP_NOFS);
if (!data) {
- mark_inode_dirty_sync(inode);
status = -ENOMEM;
goto out;
}
+ if (!test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags))
+ goto out_free;
+
+ if (test_and_set_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags)) {
+ if (!sync) {
+ status = -EAGAIN;
+ goto out_free;
+ }
+ status = wait_on_bit_lock(&nfsi->flags, NFS_INO_LAYOUTCOMMITTING,
+ nfs_wait_bit_killable, TASK_KILLABLE);
+ if (status)
+ goto out_free;
+ }
+
INIT_LIST_HEAD(&data->lseg_list);
spin_lock(&inode->i_lock);
if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) {
+ clear_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags);
spin_unlock(&inode->i_lock);
- kfree(data);
- goto out;
+ wake_up_bit(&nfsi->flags, NFS_INO_LAYOUTCOMMITTING);
+ goto out_free;
}
pnfs_list_write_lseg(inode, &data->lseg_list);
@@ -1475,6 +1490,11 @@ pnfs_layoutcommit_inode(struct inode *inode, bool sync)
status = nfs4_proc_layoutcommit(data, sync);
out:
+ if (status)
+ mark_inode_dirty_sync(inode);
dprintk("<-- %s status %d\n", __func__, status);
return status;
+out_free:
+ kfree(data);
+ goto out;
}
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