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authorJeff Layton <jlayton@redhat.com>2010-12-07 16:19:50 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2011-01-12 20:06:59 -0500
commite1181ee6575d7970bad15aaa852784b4972d2af8 (patch)
treecf1010ee6361e8bcd98ea2f29fa899fa52bf801d /fs/namei.c
parentcccb5a1e698535fa5a734ffe21c7061c97f8d8c5 (diff)
vfs: pass struct file to do_truncate on O_TRUNC opens (try #2)
When a file is opened with O_TRUNC, the truncate processing is handled by handle_truncate(). This function however doesn't receive any info about the newly instantiated filp, and therefore can't pass that info along so that the setattr can use it. This makes NFSv4 misbehave. The client does an open and gets a valid stateid, and then doesn't use that stateid on the subsequent truncate. It uses the zero-stateid instead. Most servers ignore this fact and just do the truncate anyway, but some don't like it (notably, RHEL4). It seems more correct that since we have a fully instantiated file at the time that handle_truncate is called, that we pass that along so that the truncate operation can properly use it. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/namei.c')
-rw-r--r--fs/namei.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/fs/namei.c b/fs/namei.c
index 24ece10470b6..0b14f6910fc6 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1950,8 +1950,9 @@ int may_open(struct path *path, int acc_mode, int flag)
return break_lease(inode, flag);
}
-static int handle_truncate(struct path *path)
+static int handle_truncate(struct file *filp)
{
+ struct path *path = &filp->f_path;
struct inode *inode = path->dentry->d_inode;
int error = get_write_access(inode);
if (error)
@@ -1965,7 +1966,7 @@ static int handle_truncate(struct path *path)
if (!error) {
error = do_truncate(path->dentry, 0,
ATTR_MTIME|ATTR_CTIME|ATTR_OPEN,
- NULL);
+ filp);
}
put_write_access(inode);
return error;
@@ -2063,7 +2064,7 @@ static struct file *finish_open(struct nameidata *nd,
}
if (!IS_ERR(filp)) {
if (will_truncate) {
- error = handle_truncate(&nd->path);
+ error = handle_truncate(filp);
if (error) {
fput(filp);
filp = ERR_PTR(error);