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authorChristoph Hellwig <hch@lst.de>2010-06-04 11:30:04 +0200
committerAl Viro <viro@zeniv.linux.org.uk>2010-08-09 16:47:39 -0400
commit2c27c65ed0696f0b5df2dad2cf6462d72164d547 (patch)
tree7d9036e3dea98938f7fd7074366ee73929e9b2e5 /fs/gfs2
parentdb78b877f7744bec4a9d9f9e7d10da3931d7cd39 (diff)
check ATTR_SIZE contraints in inode_change_ok
Make sure we check the truncate constraints early on in ->setattr by adding those checks to inode_change_ok. Also clean up and document inode_change_ok to make this obvious. As a fallout we don't have to call inode_newsize_ok from simple_setsize and simplify it down to a truncate_setsize which doesn't return an error. This simplifies a lot of setattr implementations and means we use truncate_setsize almost everywhere. Get rid of fat_setsize now that it's trivial and mark ext2_setsize static to make the calling convention obvious. Keep the inode_newsize_ok in vmtruncate for now as all callers need an audit for its removal anyway. Note: setattr code in ecryptfs doesn't call inode_change_ok at all and needs a deeper audit, but that is left for later. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/gfs2')
-rw-r--r--fs/gfs2/aops.c4
-rw-r--r--fs/gfs2/ops_inode.c6
2 files changed, 4 insertions, 6 deletions
diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c
index 703000d6e4d..54fe087bf54 100644
--- a/fs/gfs2/aops.c
+++ b/fs/gfs2/aops.c
@@ -702,12 +702,12 @@ out:
page_cache_release(page);
/*
- * XXX(hch): the call below should probably be replaced with
+ * XXX(truncate): the call below should probably be replaced with
* a call to the gfs2-specific truncate blocks helper to actually
* release disk blocks..
*/
if (pos + len > ip->i_inode.i_size)
- simple_setsize(&ip->i_inode, ip->i_inode.i_size);
+ truncate_setsize(&ip->i_inode, ip->i_inode.i_size);
out_endtrans:
gfs2_trans_end(sdp);
out_trans_fail:
diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c
index d7d410a4ca4..1009be2c973 100644
--- a/fs/gfs2/ops_inode.c
+++ b/fs/gfs2/ops_inode.c
@@ -1072,7 +1072,7 @@ int gfs2_permission(struct inode *inode, int mask)
}
/*
- * XXX: should be changed to have proper ordering by opencoding simple_setsize
+ * XXX(truncate): the truncate_setsize calls should be moved to the end.
*/
static int setattr_size(struct inode *inode, struct iattr *attr)
{
@@ -1084,10 +1084,8 @@ static int setattr_size(struct inode *inode, struct iattr *attr)
error = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks);
if (error)
return error;
- error = simple_setsize(inode, attr->ia_size);
+ truncate_setsize(inode, attr->ia_size);
gfs2_trans_end(sdp);
- if (error)
- return error;
}
error = gfs2_truncatei(ip, attr->ia_size);