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Commit fa385bef authored by Jeff Mahoney's avatar Jeff Mahoney Committed by Linus Torvalds
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[PATCH] reiserfs: reiserfs: check for files > 2GB on 3.5.x disks 



When a filesystem has been converted from 3.5.x to 3.6.x, we need an extra
check during file write to make sure we are not trying to make a 3.5.x file
> 2GB.

Signed-off-by: default avatarChris Mason <mason@suse.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 6ae1ea44

fs/reiserfs/file.c

+17 −0
Original line number Diff line number Diff line
@@ -1287,6 +1287,23 @@ static ssize_t reiserfs_file_write(struct file *file, /* the file we are going t 
	struct reiserfs_transaction_handle th;

	th.t_trans_id = 0;



	/* If a filesystem is converted from 3.5 to 3.6, we'll have v3.5 items

	* lying around (most of the disk, in fact). Despite the filesystem

	* now being a v3.6 format, the old items still can't support large

	* file sizes. Catch this case here, as the rest of the VFS layer is

	* oblivious to the different limitations between old and new items.

	* reiserfs_setattr catches this for truncates. This chunk is lifted

	* from generic_write_checks. */

	if (get_inode_item_key_version (inode) == KEY_FORMAT_3_5 &&

	    *ppos + count > MAX_NON_LFS) {

		if (*ppos >= MAX_NON_LFS) {

			send_sig(SIGXFSZ, current, 0);

			return -EFBIG;

		}

		if (count > MAX_NON_LFS - (unsigned long)*ppos)

			count = MAX_NON_LFS - (unsigned long)*ppos;

	}



	if (file->f_flags & O_DIRECT) {	// Direct IO needs treatment

		ssize_t result, after_file_end = 0;

		if ((*ppos + count >= inode->i_size)