linux/net/smc
Gustavo A. R. Silva 9748dbc9f2 net/smc: Avoid -Wflex-array-member-not-at-end warnings
-Wflex-array-member-not-at-end is coming in GCC-14, and we are getting
ready to enable it globally.

There are currently a couple of objects in `struct smc_clc_msg_proposal_area`
that contain a couple of flexible structures:

struct smc_clc_msg_proposal_area {
	...
	struct smc_clc_v2_extension             pclc_v2_ext;
	...
	struct smc_clc_smcd_v2_extension        pclc_smcd_v2_ext;
	...
};

So, in order to avoid ending up with a couple of flexible-array members
in the middle of a struct, we use the `struct_group_tagged()` helper to
separate the flexible array from the rest of the members in the flexible
structure:

struct smc_clc_smcd_v2_extension {
        struct_group_tagged(smc_clc_smcd_v2_extension_fixed, fixed,
                            u8 system_eid[SMC_MAX_EID_LEN];
                            u8 reserved[16];
        );
        struct smc_clc_smcd_gid_chid gidchid[];
};

With the change described above, we now declare objects of the type of
the tagged struct without embedding flexible arrays in the middle of
another struct:

struct smc_clc_msg_proposal_area {
        ...
        struct smc_clc_v2_extension_fixed	pclc_v2_ext;
        ...
        struct smc_clc_smcd_v2_extension_fixed	pclc_smcd_v2_ext;
        ...
};

We also use `container_of()` when we need to retrieve a pointer to the
flexible structures.

So, with these changes, fix the following warnings:

In file included from net/smc/af_smc.c:42:
net/smc/smc_clc.h:186:49: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
  186 |         struct smc_clc_v2_extension             pclc_v2_ext;
      |                                                 ^~~~~~~~~~~
net/smc/smc_clc.h:188:49: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
  188 |         struct smc_clc_smcd_v2_extension        pclc_smcd_v2_ext;
      |                                                 ^~~~~~~~~~~~~~~~

Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Wen Gu <guwen@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2024-04-03 11:01:30 +01:00
..
af_smc.c net/smc: make smc_hash_sk/smc_unhash_sk static 2024-03-29 09:48:23 +00:00
Kconfig net/smc: Fix dependency of SMC on ISM 2023-10-10 11:51:41 +02:00
Makefile net/smc: fix compile warning for smc_sysctl 2022-03-07 11:59:17 +00:00
smc_cdc.c net/smc: allow cdc msg send rather than drop it with NULL sndbuf_desc 2023-11-06 10:01:07 +00:00
smc_cdc.h net/smc: fix kernel panic caused by race of smc_sock 2021-12-28 12:42:45 +00:00
smc_clc.c net/smc: Avoid -Wflex-array-member-not-at-end warnings 2024-04-03 11:01:30 +01:00
smc_clc.h net/smc: Avoid -Wflex-array-member-not-at-end warnings 2024-04-03 11:01:30 +01:00
smc_close.c net/smc: put sk reference if close work was canceled 2023-11-06 10:01:07 +00:00
smc_close.h
smc_core.c net/smc: change the term virtual ISM to Emulated-ISM 2024-02-07 18:24:19 -08:00
smc_core.h net/smc: compatible with 128-bits extended GID of virtual ISM device 2023-12-26 20:24:33 +00:00
smc_diag.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2024-01-25 14:20:08 -08:00
smc_ib.c mm, treewide: rename MAX_ORDER to MAX_PAGE_ORDER 2024-01-08 15:27:15 -08:00
smc_ib.h net/smc: fix smc clc failed issue when netdevice not in init_net 2023-10-13 16:52:02 -07:00
smc_ism.c net/smc: manage system EID in SMC stack instead of ISM driver 2023-12-26 20:24:33 +00:00
smc_ism.h net/smc: change the term virtual ISM to Emulated-ISM 2024-02-07 18:24:19 -08:00
smc_llc.c net/smc: support max links per lgr negotiation in clc handshake 2023-08-19 12:46:53 +01:00
smc_llc.h net/smc: Introduce a specific sysctl for TEST_LINK time 2022-09-22 12:58:21 +02:00
smc_netlink.c genetlink: start to validate reserved header bytes 2022-08-29 12:47:15 +01:00
smc_netlink.h net/smc: add support for user defined EIDs 2021-09-14 12:49:10 +01:00
smc_netns.h net/smc: introduce list of pnetids for Ethernet devices 2020-09-28 15:19:03 -07:00
smc_pnet.c net/smc: reduce rtnl pressure in smc_pnet_create_pnetids_list() 2024-03-05 15:49:35 +01:00
smc_pnet.h net/smc: Use a mutex for locking "struct smc_pnettable" 2022-02-24 09:09:33 -08:00
smc_rx.c net: add sk_wake_async_rcu() helper 2024-03-29 15:03:11 -07:00
smc_rx.h
smc_stats.c smc: Drop smc_sendpage() in favour of smc_sendmsg() + MSG_SPLICE_PAGES 2023-06-24 15:50:12 -07:00
smc_stats.h net/smc: Fix pos miscalculation in statistics 2023-10-11 10:36:35 +01:00
smc_sysctl.c net/smc: add sysctl for max conns per lgr for SMC-R v2.1 2023-11-24 12:13:14 +00:00
smc_sysctl.h net/smc: add sysctl for max conns per lgr for SMC-R v2.1 2023-11-24 12:13:14 +00:00
smc_tracepoint.c net/smc: Introduce tracepoint for smcr link down 2021-11-01 13:39:14 +00:00
smc_tracepoint.h net/smc: Add net namespace for tracepoints 2022-01-02 12:07:39 +00:00
smc_tx.c net/smc: remove unneeded atomic operations in smc_tx_sndbuf_nonempty 2023-11-24 15:00:47 +00:00
smc_tx.h smc: Drop smc_sendpage() in favour of smc_sendmsg() + MSG_SPLICE_PAGES 2023-06-24 15:50:12 -07:00
smc_wr.c net/smc: Use percpu ref for wr tx reference 2023-03-17 08:59:01 +00:00
smc_wr.h net/smc: Use percpu ref for wr tx reference 2023-03-17 08:59:01 +00:00
smc.h net/smc: change the term virtual ISM to Emulated-ISM 2024-02-07 18:24:19 -08:00