[PATCH] fuse: fsync() did not return IO errors

[Maxim Patlasov]

From: Alexey Kuznetsov <kuz...@parallels.com>

Due to implementation of fuse writeback filemap_write_and_wait_range()
does not catch errors. We have to do this directly after fuse_sync_writes()

Signed-off-by: Alexey Kuznetsov <kuz...@virtuozzo.com>
Signed-off-by: Maxim Patlasov <mpatla...@virtuozzo.com>
---
 fs/fuse/file.c |   15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 9154f86..ad1da83 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -462,6 +462,21 @@ int fuse_fsync_common(struct file *file, loff_t start, 
loff_t end,
                goto out;
 
        fuse_sync_writes(inode);
+
+       /*
+        * Due to implementation of fuse writeback
+        * filemap_write_and_wait_range() does not catch errors.
+        * We have to do this directly after fuse_sync_writes()
+        */
+       if (test_bit(AS_ENOSPC, &file->f_mapping->flags) &&
+           test_and_clear_bit(AS_ENOSPC, &file->f_mapping->flags))
+               err = -ENOSPC;
+       if (test_bit(AS_EIO, &file->f_mapping->flags) &&
+           test_and_clear_bit(AS_EIO, &file->f_mapping->flags))
+               err = -EIO;
+       if (err)
+               goto out;
+
        err = sync_inode_metadata(inode, 1);
        if (err)
                goto out;