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fuse: fuse_flush must check mapping->flags for errors

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fuse_flush() calls write_inode_now() that triggers writeback, but actual
writeback will happen later, on fuse_sync_writes(). If an error happens,
fuse_writepage_end() will set error bit in mapping->flags. So, we have to
check mapping->flags after fuse_sync_writes().

Signed-off-by: Maxim Patlasov <mpatlasov@virtuozzo.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Fixes: 4d99ff8f12 ("fuse: Turn writeback cache on")
Cc: <stable@vger.kernel.org> # v3.15+
This commit is contained in:
Maxim Patlasov 2016-07-19 18:12:26 -07:00 committed by Miklos Szeredi
parent ac7f052b9e
commit 9ebce595f6
1 changed files with 9 additions and 0 deletions
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9
fs/fuse/file.c
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@ -417,6 +417,15 @@ static int fuse_flush(struct file *file, fl_owner_t id)
fuse_sync_writes(inode);
inode_unlock(inode);
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)
return err;
req = fuse_get_req_nofail_nopages(fc, file);
memset(&inarg, 0, sizeof(inarg));
inarg.fh = ff->fh;