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Date: Wed, 21 Dec 2016 00:33:50 -0800
From: Christoph Hellwig <hch@...radead.org>
To: Kees Cook <keescook@...omium.org>
Cc: linux-kernel@...r.kernel.org,
Anil Gurumurthy <anil.gurumurthy@...gic.com>,
Sudarsana Kalluru <sudarsana.kalluru@...gic.com>,
"James E.J. Bottomley" <jejb@...ux.vnet.ibm.com>,
"Martin K. Petersen" <martin.petersen@...cle.com>,
linux-scsi@...r.kernel.org
Subject: Re: [PATCH] scsi/bfa: use designated initializers
On Fri, Dec 16, 2016 at 05:05:15PM -0800, Kees Cook wrote:
> Prepare to mark sensitive kernel structures for randomization by making
> sure they're using designated initializers. These were identified during
> allyesconfig builds of x86, arm, and arm64, with most initializer fixes
> extracted from grsecurity.
Instead of further bloating the idiotic dispatch table just kill it off
entirely:
---
>From d20ca8dee2c620b8199e998269f8e0249bc1ba04 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@....de>
Date: Wed, 21 Dec 2016 09:15:02 +0100
Subject: bfa: remove bfa_fcs_mod_s
Just call the functions directly instead of obsfucating the call chain.
Signed-off-by: Christoph Hellwig <hch@....de>
---
drivers/scsi/bfa/bfa_fcs.c | 181 ++++++++++++---------------------------------
drivers/scsi/bfa/bfa_fcs.h | 4 -
2 files changed, 46 insertions(+), 139 deletions(-)
diff --git a/drivers/scsi/bfa/bfa_fcs.c b/drivers/scsi/bfa/bfa_fcs.c
index 1e7e139..4aa61e2 100644
--- a/drivers/scsi/bfa/bfa_fcs.c
+++ b/drivers/scsi/bfa/bfa_fcs.c
@@ -28,24 +28,6 @@
BFA_TRC_FILE(FCS, FCS);
/*
- * FCS sub-modules
- */
-struct bfa_fcs_mod_s {
- void (*attach) (struct bfa_fcs_s *fcs);
- void (*modinit) (struct bfa_fcs_s *fcs);
- void (*modexit) (struct bfa_fcs_s *fcs);
-};
-
-#define BFA_FCS_MODULE(_mod) { _mod ## _modinit, _mod ## _modexit }
-
-static struct bfa_fcs_mod_s fcs_modules[] = {
- { bfa_fcs_port_attach, NULL, NULL },
- { bfa_fcs_uf_attach, NULL, NULL },
- { bfa_fcs_fabric_attach, bfa_fcs_fabric_modinit,
- bfa_fcs_fabric_modexit },
-};
-
-/*
* fcs_api BFA FCS API
*/
@@ -58,52 +40,19 @@ bfa_fcs_exit_comp(void *fcs_cbarg)
complete(&bfad->comp);
}
-
-
/*
- * fcs_api BFA FCS API
- */
-
-/*
- * fcs attach -- called once to initialize data structures at driver attach time
+ * fcs initialization, called once after bfa initialization is complete
*/
void
-bfa_fcs_attach(struct bfa_fcs_s *fcs, struct bfa_s *bfa, struct bfad_s *bfad,
- bfa_boolean_t min_cfg)
+bfa_fcs_init(struct bfa_fcs_s *fcs)
{
- int i;
- struct bfa_fcs_mod_s *mod;
-
- fcs->bfa = bfa;
- fcs->bfad = bfad;
- fcs->min_cfg = min_cfg;
- fcs->num_rport_logins = 0;
-
- bfa->fcs = BFA_TRUE;
- fcbuild_init();
-
- for (i = 0; i < ARRAY_SIZE(fcs_modules); i++) {
- mod = &fcs_modules[i];
- if (mod->attach)
- mod->attach(fcs);
- }
+ bfa_sm_send_event(&fcs->fabric, BFA_FCS_FABRIC_SM_CREATE);
+ bfa_trc(fcs, 0);
}
/*
- * fcs initialization, called once after bfa initialization is complete
+ * fcs_api BFA FCS API
*/
-void
-bfa_fcs_init(struct bfa_fcs_s *fcs)
-{
- int i;
- struct bfa_fcs_mod_s *mod;
-
- for (i = 0; i < ARRAY_SIZE(fcs_modules); i++) {
- mod = &fcs_modules[i];
- if (mod->modinit)
- mod->modinit(fcs);
- }
-}
/*
* FCS update cfg - reset the pwwn/nwwn of fabric base logical port
@@ -180,26 +129,14 @@ bfa_fcs_driver_info_init(struct bfa_fcs_s *fcs,
void
bfa_fcs_exit(struct bfa_fcs_s *fcs)
{
- struct bfa_fcs_mod_s *mod;
- int nmods, i;
-
bfa_wc_init(&fcs->wc, bfa_fcs_exit_comp, fcs);
-
- nmods = ARRAY_SIZE(fcs_modules);
-
- for (i = 0; i < nmods; i++) {
-
- mod = &fcs_modules[i];
- if (mod->modexit) {
- bfa_wc_up(&fcs->wc);
- mod->modexit(fcs);
- }
- }
-
+ bfa_wc_up(&fcs->wc);
+ bfa_trc(fcs, 0);
+ bfa_lps_delete(fcs->fabric.lps);
+ bfa_sm_send_event(&fcs->fabric, BFA_FCS_FABRIC_SM_DELETE);
bfa_wc_wait(&fcs->wc);
}
-
/*
* Fabric module implementation.
*/
@@ -1128,62 +1065,6 @@ bfa_fcs_fabric_stop_comp(void *cbarg)
*/
/*
- * Attach time initialization.
- */
-void
-bfa_fcs_fabric_attach(struct bfa_fcs_s *fcs)
-{
- struct bfa_fcs_fabric_s *fabric;
-
- fabric = &fcs->fabric;
- memset(fabric, 0, sizeof(struct bfa_fcs_fabric_s));
-
- /*
- * Initialize base fabric.
- */
- fabric->fcs = fcs;
- INIT_LIST_HEAD(&fabric->vport_q);
- INIT_LIST_HEAD(&fabric->vf_q);
- fabric->lps = bfa_lps_alloc(fcs->bfa);
- WARN_ON(!fabric->lps);
-
- /*
- * Initialize fabric delete completion handler. Fabric deletion is
- * complete when the last vport delete is complete.
- */
- bfa_wc_init(&fabric->wc, bfa_fcs_fabric_delete_comp, fabric);
- bfa_wc_up(&fabric->wc); /* For the base port */
-
- bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_uninit);
- bfa_fcs_lport_attach(&fabric->bport, fabric->fcs, FC_VF_ID_NULL, NULL);
-}
-
-void
-bfa_fcs_fabric_modinit(struct bfa_fcs_s *fcs)
-{
- bfa_sm_send_event(&fcs->fabric, BFA_FCS_FABRIC_SM_CREATE);
- bfa_trc(fcs, 0);
-}
-
-/*
- * Module cleanup
- */
-void
-bfa_fcs_fabric_modexit(struct bfa_fcs_s *fcs)
-{
- struct bfa_fcs_fabric_s *fabric;
-
- bfa_trc(fcs, 0);
-
- /*
- * Cleanup base fabric.
- */
- fabric = &fcs->fabric;
- bfa_lps_delete(fabric->lps);
- bfa_sm_send_event(fabric, BFA_FCS_FABRIC_SM_DELETE);
-}
-
-/*
* Fabric module stop -- stop FCS actions
*/
void
@@ -1633,12 +1514,6 @@ bfa_fcs_port_event_handler(void *cbarg, enum bfa_port_linkstate event)
}
}
-void
-bfa_fcs_port_attach(struct bfa_fcs_s *fcs)
-{
- bfa_fcport_event_register(fcs->bfa, bfa_fcs_port_event_handler, fcs);
-}
-
/*
* BFA FCS UF ( Unsolicited Frames)
*/
@@ -1706,8 +1581,44 @@ bfa_fcs_uf_recv(void *cbarg, struct bfa_uf_s *uf)
bfa_uf_free(uf);
}
+/*
+ * fcs attach -- called once to initialize data structures at driver attach time
+ */
void
-bfa_fcs_uf_attach(struct bfa_fcs_s *fcs)
+bfa_fcs_attach(struct bfa_fcs_s *fcs, struct bfa_s *bfa, struct bfad_s *bfad,
+ bfa_boolean_t min_cfg)
{
+ struct bfa_fcs_fabric_s *fabric = &fcs->fabric;
+
+ fcs->bfa = bfa;
+ fcs->bfad = bfad;
+ fcs->min_cfg = min_cfg;
+ fcs->num_rport_logins = 0;
+
+ bfa->fcs = BFA_TRUE;
+ fcbuild_init();
+
+ bfa_fcport_event_register(fcs->bfa, bfa_fcs_port_event_handler, fcs);
bfa_uf_recv_register(fcs->bfa, bfa_fcs_uf_recv, fcs);
+
+ memset(fabric, 0, sizeof(struct bfa_fcs_fabric_s));
+
+ /*
+ * Initialize base fabric.
+ */
+ fabric->fcs = fcs;
+ INIT_LIST_HEAD(&fabric->vport_q);
+ INIT_LIST_HEAD(&fabric->vf_q);
+ fabric->lps = bfa_lps_alloc(fcs->bfa);
+ WARN_ON(!fabric->lps);
+
+ /*
+ * Initialize fabric delete completion handler. Fabric deletion is
+ * complete when the last vport delete is complete.
+ */
+ bfa_wc_init(&fabric->wc, bfa_fcs_fabric_delete_comp, fabric);
+ bfa_wc_up(&fabric->wc); /* For the base port */
+
+ bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_uninit);
+ bfa_fcs_lport_attach(&fabric->bport, fabric->fcs, FC_VF_ID_NULL, NULL);
}
diff --git a/drivers/scsi/bfa/bfa_fcs.h b/drivers/scsi/bfa/bfa_fcs.h
index 0f797a5..e60f72b 100644
--- a/drivers/scsi/bfa/bfa_fcs.h
+++ b/drivers/scsi/bfa/bfa_fcs.h
@@ -808,9 +808,7 @@ void bfa_fcs_vf_get_ports(bfa_fcs_vf_t *vf, wwn_t vpwwn[], int *nports);
/*
* fabric protected interface functions
*/
-void bfa_fcs_fabric_attach(struct bfa_fcs_s *fcs);
void bfa_fcs_fabric_modinit(struct bfa_fcs_s *fcs);
-void bfa_fcs_fabric_modexit(struct bfa_fcs_s *fcs);
void bfa_fcs_fabric_link_up(struct bfa_fcs_fabric_s *fabric);
void bfa_fcs_fabric_link_down(struct bfa_fcs_fabric_s *fabric);
void bfa_fcs_fabric_addvport(struct bfa_fcs_fabric_s *fabric,
@@ -827,8 +825,6 @@ void bfa_fcs_fabric_nsymb_init(struct bfa_fcs_fabric_s *fabric);
void bfa_fcs_fabric_set_fabric_name(struct bfa_fcs_fabric_s *fabric,
wwn_t fabric_name);
u16 bfa_fcs_fabric_get_switch_oui(struct bfa_fcs_fabric_s *fabric);
-void bfa_fcs_uf_attach(struct bfa_fcs_s *fcs);
-void bfa_fcs_port_attach(struct bfa_fcs_s *fcs);
void bfa_fcs_fabric_modstop(struct bfa_fcs_s *fcs);
void bfa_fcs_fabric_sm_online(struct bfa_fcs_fabric_s *fabric,
enum bfa_fcs_fabric_event event);
--
2.1.4
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