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introduce new LSM hooks where vfsmount is available.

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Add new LSM hooks for path-based checks.  Call them on directory-modifying
operations at the points where we still know the vfsmount involved.

Signed-off-by: Kentaro Takeda <takedakn@nttdata.co.jp>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Toshiharu Harada <haradats@nttdata.co.jp>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Kentaro Takeda
2008-12-17 13:24:15 +09:00
committed by Al Viro
parent 6a94cb7306
commit be6d3e56a6
7 changed files with 314 additions and 0 deletions
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5
fs/open.c
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@@ -272,6 +272,8 @@ static long do_sys_truncate(const char __user *pathname, loff_t length)
goto put_write_and_out;
error = locks_verify_truncate(inode, NULL, length);
if (!error)
error = security_path_truncate(&path, length, 0);
if (!error) {
DQUOT_INIT(inode);
error = do_truncate(path.dentry, length, 0, NULL);
@@ -328,6 +330,9 @@ static long do_sys_ftruncate(unsigned int fd, loff_t length, int small)
goto out_putf;
error = locks_verify_truncate(inode, file, length);
if (!error)
error = security_path_truncate(&file->f_path, length,
ATTR_MTIME|ATTR_CTIME);
if (!error)
error = do_truncate(dentry, length, ATTR_MTIME|ATTR_CTIME, file);
out_putf: