From 1920779e67cbf5ea8afef317777c5bf2b8096188 Mon Sep 17 00:00:00 2001 From: Dave Chinner Date: Thu, 24 Jun 2010 11:15:47 +1000 Subject: xfs: rename XFS_IGET_BULKSTAT to XFS_IGET_UNTRUSTED Inode numbers may come from somewhere external to the filesystem (e.g. file handles, bulkstat information) and so are inherently untrusted. Rename the flag we use for these lookups to make it obvious we are doing a lookup of an untrusted inode number and need to verify it completely before trying to read it from disk. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/xfs_ialloc.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) (limited to 'fs/xfs/xfs_ialloc.c') diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c index 0c946c8e05da..d8fd36685eb9 100644 --- a/fs/xfs/xfs_ialloc.c +++ b/fs/xfs/xfs_ialloc.c @@ -1251,7 +1251,7 @@ xfs_imap_lookup( return error; /* for untrusted inodes check it is allocated first */ - if ((flags & XFS_IGET_BULKSTAT) && + if ((flags & XFS_IGET_UNTRUSTED) && (rec.ir_free & XFS_INOBT_MASK(agino - rec.ir_startino))) return EINVAL; @@ -1292,8 +1292,11 @@ xfs_imap( if (agno >= mp->m_sb.sb_agcount || agbno >= mp->m_sb.sb_agblocks || ino != XFS_AGINO_TO_INO(mp, agno, agino)) { #ifdef DEBUG - /* no diagnostics for bulkstat, ino comes from userspace */ - if (flags & XFS_IGET_BULKSTAT) + /* + * Don't output diagnostic information for untrusted inodes + * as they can be invalid without implying corruption. + */ + if (flags & XFS_IGET_UNTRUSTED) return XFS_ERROR(EINVAL); if (agno >= mp->m_sb.sb_agcount) { xfs_fs_cmn_err(CE_ALERT, mp, @@ -1329,7 +1332,7 @@ xfs_imap( * inodes in stale state on disk. Hence we have to do a btree lookup * in all cases where an untrusted inode number is passed. */ - if (flags & XFS_IGET_BULKSTAT) { + if (flags & XFS_IGET_UNTRUSTED) { error = xfs_imap_lookup(mp, tp, agno, agino, agbno, &chunk_agbno, &offset_agbno, flags); if (error) -- cgit v1.2.3