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| author | Alexander Aring <aahringo@redhat.com> | 2023-08-01 14:09:48 -0400 |
|---|---|---|
| committer | David Teigland <teigland@redhat.com> | 2023-08-10 10:33:03 -0500 |
| commit | 1151935182b40bbe398905850f6f7f4fbb262e06 (patch) | |
| tree | 1a15caa862be793db9bf5413c1620fbe22848cbf /fs/dlm/midcomms.c | |
| parent | b9d2f6ada0083bad46f37a1238fea718b575e0fa (diff) | |
| download | linux-1151935182b40bbe398905850f6f7f4fbb262e06.tar.gz | |
fs: dlm: constify receive buffer
The dlm receive buffer should be never manipulated as DLM is the last
instance of parsing layer. This patch constify the whole receive buffer
so we are sure it never gets manipulated when it's being parsed.
Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>
Diffstat (limited to 'fs/dlm/midcomms.c')
| -rw-r--r-- | fs/dlm/midcomms.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/fs/dlm/midcomms.c b/fs/dlm/midcomms.c index 8ebffbfdc00ae..c125496e03bf1 100644 --- a/fs/dlm/midcomms.c +++ b/fs/dlm/midcomms.c @@ -499,7 +499,8 @@ static void dlm_pas_fin_ack_rcv(struct midcomms_node *node) spin_unlock(&node->state_lock); } -static void dlm_receive_buffer_3_2_trace(uint32_t seq, union dlm_packet *p) +static void dlm_receive_buffer_3_2_trace(uint32_t seq, + const union dlm_packet *p) { switch (p->header.h_cmd) { case DLM_MSG: @@ -513,7 +514,7 @@ static void dlm_receive_buffer_3_2_trace(uint32_t seq, union dlm_packet *p) } } -static void dlm_midcomms_receive_buffer(union dlm_packet *p, +static void dlm_midcomms_receive_buffer(const union dlm_packet *p, struct midcomms_node *node, uint32_t seq) { @@ -708,7 +709,8 @@ static int dlm_midcomms_version_check_3_2(struct midcomms_node *node) return 0; } -static int dlm_opts_check_msglen(union dlm_packet *p, uint16_t msglen, int nodeid) +static int dlm_opts_check_msglen(const union dlm_packet *p, uint16_t msglen, + int nodeid) { int len = msglen; @@ -757,7 +759,7 @@ static int dlm_opts_check_msglen(union dlm_packet *p, uint16_t msglen, int nodei return 0; } -static void dlm_midcomms_receive_buffer_3_2(union dlm_packet *p, int nodeid) +static void dlm_midcomms_receive_buffer_3_2(const union dlm_packet *p, int nodeid) { uint16_t msglen = le16_to_cpu(p->header.h_length); struct midcomms_node *node; @@ -878,7 +880,7 @@ static int dlm_midcomms_version_check_3_1(struct midcomms_node *node) return 0; } -static void dlm_midcomms_receive_buffer_3_1(union dlm_packet *p, int nodeid) +static void dlm_midcomms_receive_buffer_3_1(const union dlm_packet *p, int nodeid) { uint16_t msglen = le16_to_cpu(p->header.h_length); struct midcomms_node *node; @@ -977,10 +979,10 @@ int dlm_process_incoming_buffer(int nodeid, unsigned char *buf, int len) switch (hd->h_version) { case cpu_to_le32(DLM_VERSION_3_1): - dlm_midcomms_receive_buffer_3_1((union dlm_packet *)ptr, nodeid); + dlm_midcomms_receive_buffer_3_1((const union dlm_packet *)ptr, nodeid); break; case cpu_to_le32(DLM_VERSION_3_2): - dlm_midcomms_receive_buffer_3_2((union dlm_packet *)ptr, nodeid); + dlm_midcomms_receive_buffer_3_2((const union dlm_packet *)ptr, nodeid); break; default: log_print("received invalid version header: %u from node %d, will skip this message", |