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From Al Viro:
BTW, speaking of struct file treatment related to sockets -
there's this piece of code in iscsi:
/*
* The SCTP stack needs struct socket->file.
*/
if ((np->np_network_transport == ISCSI_SCTP_TCP) ||
(np->np_network_transport == ISCSI_SCTP_UDP)) {
if (!new_sock->file) {
new_sock->file = kzalloc(
sizeof(struct file), GFP_KERNEL);
For one thing, as far as I can see it'not true - sctp does *not* depend on
socket->file being non-NULL; it does, in one place, check socket->file->f_flags
for O_NONBLOCK, but there it treats NULL socket->file as "flag not set".
Which is the case here anyway - the fake struct file created in
__iscsi_target_login_thread() (and in iscsi_target_setup_login_socket(), with
the same excuse) do *not* get that flag set.
Moreover, it's a bloody serious violation of a bunch of asserts in VFS;
all struct file instances should come from filp_cachep, via get_empty_filp()
(or alloc_file(), which is a wrapper for it). FWIW, I'm very tempted to
do this and be done with the entire mess:
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andy Grover <agrover@redhat.com>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: stable@vger.kernel.org
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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|---|---|---|
| .. | ||
| iscsi_target_auth.c | ||
| iscsi_target_auth.h | ||
| iscsi_target_configfs.c | ||
| iscsi_target_configfs.h | ||
| iscsi_target_core.h | ||
| iscsi_target_datain_values.c | ||
| iscsi_target_datain_values.h | ||
| iscsi_target_device.c | ||
| iscsi_target_device.h | ||
| iscsi_target_erl0.c | ||
| iscsi_target_erl0.h | ||
| iscsi_target_erl1.c | ||
| iscsi_target_erl1.h | ||
| iscsi_target_erl2.c | ||
| iscsi_target_erl2.h | ||
| iscsi_target_login.c | ||
| iscsi_target_login.h | ||
| iscsi_target_nego.c | ||
| iscsi_target_nego.h | ||
| iscsi_target_nodeattrib.c | ||
| iscsi_target_nodeattrib.h | ||
| iscsi_target_parameters.c | ||
| iscsi_target_parameters.h | ||
| iscsi_target_seq_pdu_list.c | ||
| iscsi_target_seq_pdu_list.h | ||
| iscsi_target_stat.c | ||
| iscsi_target_stat.h | ||
| iscsi_target_tmr.c | ||
| iscsi_target_tmr.h | ||
| iscsi_target_tpg.c | ||
| iscsi_target_tpg.h | ||
| iscsi_target_tq.c | ||
| iscsi_target_tq.h | ||
| iscsi_target_util.c | ||
| iscsi_target_util.h | ||
| iscsi_target.c | ||
| iscsi_target.h | ||
| Kconfig | ||
| Makefile | ||