nilfs2: Convert to new freezing mechanism
We change nilfs_page_mkwrite() to provide proper freeze protection for
writeable page faults (we must wait for frozen filesystem even if the
page is fully mapped).
We remove all vfs_check_frozen() checks since they are now handled by
the generic code.
CC: linux-nilfs@vger.kernel.org
CC: KONISHI Ryusuke <konishi.ryusuke@lab.ntt.co.jp>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/nilfs2/file.c b/fs/nilfs2/file.c
index 62cebc8..a4d56ac 100644
--- a/fs/nilfs2/file.c
+++ b/fs/nilfs2/file.c
@@ -69,16 +69,18 @@
struct page *page = vmf->page;
struct inode *inode = vma->vm_file->f_dentry->d_inode;
struct nilfs_transaction_info ti;
- int ret;
+ int ret = 0;
if (unlikely(nilfs_near_disk_full(inode->i_sb->s_fs_info)))
return VM_FAULT_SIGBUS; /* -ENOSPC */
+ sb_start_pagefault(inode->i_sb);
lock_page(page);
if (page->mapping != inode->i_mapping ||
page_offset(page) >= i_size_read(inode) || !PageUptodate(page)) {
unlock_page(page);
- return VM_FAULT_NOPAGE; /* make the VM retry the fault */
+ ret = -EFAULT; /* make the VM retry the fault */
+ goto out;
}
/*
@@ -112,19 +114,21 @@
ret = nilfs_transaction_begin(inode->i_sb, &ti, 1);
/* never returns -ENOMEM, but may return -ENOSPC */
if (unlikely(ret))
- return VM_FAULT_SIGBUS;
+ goto out;
- ret = block_page_mkwrite(vma, vmf, nilfs_get_block);
- if (ret != VM_FAULT_LOCKED) {
+ ret = __block_page_mkwrite(vma, vmf, nilfs_get_block);
+ if (ret) {
nilfs_transaction_abort(inode->i_sb);
- return ret;
+ goto out;
}
nilfs_set_file_dirty(inode, 1 << (PAGE_SHIFT - inode->i_blkbits));
nilfs_transaction_commit(inode->i_sb);
mapped:
wait_on_page_writeback(page);
- return VM_FAULT_LOCKED;
+ out:
+ sb_end_pagefault(inode->i_sb);
+ return block_page_mkwrite_return(ret);
}
static const struct vm_operations_struct nilfs_file_vm_ops = {
