From 6e849ce88cd63efc6650a1826d18ed742eb31999 Mon Sep 17 00:00:00 2001 From: Andreas Gruenbacher Date: Mon, 14 Mar 2011 17:27:45 +0100 Subject: [PATCH] drbd: Get rid of P_MAX_CMD Instead of artificially enlarging the command decoding arrays to P_MAX_CMD entries, check if an index is within the valid range using the ARRAY_SIZE() macro. Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg --- drivers/block/drbd/drbd_int.h | 1 - drivers/block/drbd/drbd_main.c | 3 +-- drivers/block/drbd/drbd_receiver.c | 10 ++++------ 3 files changed, 5 insertions(+), 9 deletions(-) diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h index 17e905d0582d..be52b58a97d7 100644 --- a/drivers/block/drbd/drbd_int.h +++ b/drivers/block/drbd/drbd_int.h @@ -225,7 +225,6 @@ enum drbd_packet { P_CONN_ST_CHG_REPLY = 0x2b, /* meta sock: Connection side state req reply */ P_RETRY_WRITE = 0x2c, /* Protocol C: retry conflicting write request */ - P_MAX_CMD = 0x2d, P_MAY_IGNORE = 0x100, /* Flag to test if (cmd > P_MAY_IGNORE) ... */ P_MAX_OPT_CMD = 0x101, diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c index b93c5eccd73d..f43752fb5b52 100644 --- a/drivers/block/drbd/drbd_main.c +++ b/drivers/block/drbd/drbd_main.c @@ -3019,7 +3019,6 @@ const char *cmdname(enum drbd_packet cmd) [P_DELAY_PROBE] = "DelayProbe", [P_OUT_OF_SYNC] = "OutOfSync", [P_RETRY_WRITE] = "RetryWrite", - [P_MAX_CMD] = NULL, }; if (cmd == P_HAND_SHAKE_M) @@ -3028,7 +3027,7 @@ const char *cmdname(enum drbd_packet cmd) return "HandShakeS"; if (cmd == P_HAND_SHAKE) return "HandShake"; - if (cmd >= P_MAX_CMD) + if (cmd >= ARRAY_SIZE(cmdnames)) return "Unknown"; return cmdnames[cmd]; } diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c index 8c82d8945cf6..262e5d97991c 100644 --- a/drivers/block/drbd/drbd_receiver.c +++ b/drivers/block/drbd/drbd_receiver.c @@ -3875,9 +3875,6 @@ static struct data_cmd drbd_cmd_handler[] = { [P_DELAY_PROBE] = { 0, sizeof(struct p_delay_probe93), receive_skip }, [P_OUT_OF_SYNC] = { 0, sizeof(struct p_block_desc), receive_out_of_sync }, [P_CONN_ST_CHG_REQ] = { 0, sizeof(struct p_req_state), receive_req_state }, - /* anything missing from this table is in - * the asender_tbl, see get_asender_cmd */ - [P_MAX_CMD] = { 0, 0, NULL }, }; /* All handler functions that expect a sub-header get that sub-heder in @@ -3899,7 +3896,8 @@ static void drbdd(struct drbd_tconn *tconn) if (!drbd_recv_header(tconn, &pi)) goto err_out; - if (unlikely(pi.cmd >= P_MAX_CMD || !drbd_cmd_handler[pi.cmd].function)) { + if (unlikely(pi.cmd >= ARRAY_SIZE(drbd_cmd_handler) || + !drbd_cmd_handler[pi.cmd].function)) { conn_err(tconn, "unknown packet type %d, l: %d!\n", pi.cmd, pi.size); goto err_out; } @@ -4678,9 +4676,9 @@ static struct asender_cmd *get_asender_cmd(int cmd) [P_RS_CANCEL] = { sizeof(struct p_block_ack), got_NegRSDReply}, [P_CONN_ST_CHG_REPLY]={ sizeof(struct p_req_state_reply), got_RqSReply }, [P_RETRY_WRITE] = { sizeof(struct p_block_ack), got_BlockAck }, - [P_MAX_CMD] = { 0, NULL }, }; - if (cmd > P_MAX_CMD || asender_tbl[cmd].process == NULL) + + if (cmd >= ARRAY_SIZE(asender_tbl) || !asender_tbl[cmd].process) return NULL; return &asender_tbl[cmd]; } -- 2.34.1