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Fix f_flags/f_mode in case of lookup_instantiate_filp() from open(pathname, 3)

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Just set f_flags when shoving struct file into nameidata; don't
postpone that until __dentry_open().  do_filp_open() has correct
value; lookup_instantiate_filp() doesn't - we lose the difference
between O_RDWR and 3 by that point.

We still set .intent.open.flags, so no fs code needs to be changed.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2009-12-19 10:10:39 -05:00
parent 628ff7c1d8
commit 482928d59d
4 changed files with 17 additions and 11 deletions
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6
fs/namei.c
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@@ -1640,6 +1640,7 @@ struct file *do_filp_open(int dfd, const char *pathname,
if (filp == NULL)
return ERR_PTR(-ENFILE);
nd.intent.open.file = filp;
filp->f_flags = open_flag;
nd.intent.open.flags = flag;
nd.intent.open.create_mode = 0;
error = do_path_lookup(dfd, pathname,
@@ -1685,6 +1686,7 @@ struct file *do_filp_open(int dfd, const char *pathname,
if (filp == NULL)
goto exit_parent;
nd.intent.open.file = filp;
filp->f_flags = open_flag;
nd.intent.open.flags = flag;
nd.intent.open.create_mode = mode;
dir = nd.path.dentry;
@@ -1725,7 +1727,7 @@ do_last:
mnt_drop_write(nd.path.mnt);
goto exit;
}
filp = nameidata_to_filp(&nd, open_flag);
filp = nameidata_to_filp(&nd);
mnt_drop_write(nd.path.mnt);
if (nd.root.mnt)
path_put(&nd.root);
@@ -1789,7 +1791,7 @@ ok:
mnt_drop_write(nd.path.mnt);
goto exit;
}
filp = nameidata_to_filp(&nd, open_flag);
filp = nameidata_to_filp(&nd);
if (!IS_ERR(filp)) {
error = ima_path_check(&filp->f_path, filp->f_mode &
(MAY_READ | MAY_WRITE | MAY_EXEC));