Message ID | 20120814013939.3144.13167.stgit@jf-dev1-dcblab |
---|---|
State | Superseded, archived |
Delegated to: | David Miller |
Headers | show |
On Mon, Aug 13, 2012 at 06:39:39PM -0700, John Fastabend wrote:
> - path = d_path(&file->f_path, tmp, PAGE_SIZE);
What's using tmp after that patch and do you still need to bother
allocating it?
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
On 8/13/2012 7:29 PM, Al Viro wrote: > On Mon, Aug 13, 2012 at 06:39:39PM -0700, John Fastabend wrote: >> - path = d_path(&file->f_path, tmp, PAGE_SIZE); > > What's using tmp after that patch and do you still need to bother > allocating it? > nothing removed it in v2. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/net/core/netprio_cgroup.c b/net/core/netprio_cgroup.c index ed0c043..0323ec3 100644 --- a/net/core/netprio_cgroup.c +++ b/net/core/netprio_cgroup.c @@ -296,29 +296,22 @@ void net_prio_attach(struct cgroup *cgrp, struct cgroup_taskset *tset) continue; } - rcu_read_lock(); + spin_lock(&files->file_lock); fdt = files_fdtable(files); for (fd = 0; fd < fdt->max_fds; fd++) { - char *path; struct file *file; struct socket *sock; - unsigned long s; - int rv, err = 0; + int err; file = fcheck_files(files, fd); if (!file) continue; - path = d_path(&file->f_path, tmp, PAGE_SIZE); - rv = sscanf(path, "socket:[%lu]", &s); - if (rv <= 0) - continue; - sock = sock_from_file(file, &err); - if (!err) + if (sock) sock_update_netprioidx(sock->sk, p); } - rcu_read_unlock(); + spin_unlock(&files->file_lock); task_unlock(p); } kfree(tmp);
Add lock to prevent a race with a file closing and also remove useless and ugly sscanf code. The extra code was never needed and the case it supposedly protected against is in fact handled correctly by sock_from_file as pointed out by Al Viro. CC: Neil Horman <nhorman@tuxdriver.com> Reported-by: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: John Fastabend <john.r.fastabend@intel.com> --- net/core/netprio_cgroup.c | 15 ++++----------- 1 files changed, 4 insertions(+), 11 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html