[PATCH 2.6.17-rc5-mm2 18/18] sbp2: use __attribute__((packed)) for on-the-wire structures

Stefan Richter
2006-06-02T20:30:32Z

It seems to have worked without the attribute during all the years
just because sizes of all struct members are multiples of octlets.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

Index: linux-2.6.17-rc5-mm2/drivers/ieee1394/sbp2.h
===================================================================
--- linux-2.6.17-rc5-mm2.orig/drivers/ieee1394/sbp2.h 2006-06-01 20:55:43.000000000 +0200
+++ linux-2.6.17-rc5-mm2/drivers/ieee1394/sbp2.h 2006-06-01 20:55:49.000000000 +0200
@@ -52,7 +52,7 @@ struct sbp2_command_orb {
u32 data_descriptor_lo;
u32 misc;
u8 cdb[12];
-};
+} __attribute__((packed));

#define SBP2_LOGIN_REQUEST 0x0
#define SBP2_QUERY_LOGINS_REQUEST 0x1
@@ -80,7 +80,7 @@ struct sbp2_login_orb {
u32 passwd_resp_lengths;
u32 status_fifo_hi;
u32 status_fifo_lo;
-};
+} __attribute__((packed));

#define RESPONSE_GET_LOGIN_ID(value) (value & 0xffff)
#define RESPONSE_GET_LENGTH(value) ((value >> 16) & 0xffff)
@@ -91,7 +91,7 @@ struct sbp2_login_response {
u32 command_block_agent_hi;
u32 command_block_agent_lo;
u32 reconnect_hold;
-};
+} __attribute__((packed));

#define ORB_SET_LOGIN_ID(value) (value & 0xffff)

@@ -106,7 +106,7 @@ struct sbp2_query_logins_orb {
u32 reserved_resp_length;
u32 status_fifo_hi;
u32 status_fifo_lo;
-};
+} __attribute__((packed));

#define RESPONSE_GET_MAX_LOGINS(value) (value & 0xffff)
#define RESPONSE_GET_ACTIVE_LOGINS(value) ((RESPONSE_GET_LENGTH(value) - 4) / 12)
@@ -116,7 +116,7 @@ struct sbp2_query_logins_response {
u32 misc_IDs;
u32 initiator_misc_hi;
u32 initiator_misc_lo;
-};
+} __attribute__((packed));

struct sbp2_reconnect_orb {
u32 reserved1;
@@ -127,7 +127,7 @@ struct sbp2_reconnect_orb {
u32 reserved5;
u32 status_fifo_hi;
u32 status_fifo_lo;
-};
+} __attribute__((packed));

struct sbp2_logout_orb {
u32 reserved1;
@@ -138,7 +138,7 @@ struct sbp2_logout_orb {
u32 reserved5;
u32 status_fifo_hi;
u32 status_fifo_lo;
-};
+} __attribute__((packed));

#define PAGE_TABLE_SET_SEGMENT_BASE_HI(value) (value & 0xffff)
#define PAGE_TABLE_SET_SEGMENT_LENGTH(value) ((value & 0xffff) << 16)
@@ -146,7 +146,7 @@ struct sbp2_logout_orb {
struct sbp2_unrestricted_page_table {
u32 length_segment_base_hi;
u32 segment_base_lo;
-};
+} __attribute__((packed));

#define RESP_STATUS_REQUEST_COMPLETE 0x0
#define RESP_STATUS_TRANSPORT_FAILURE 0x1
@@ -191,7 +191,7 @@ struct sbp2_status_block {
u32 ORB_offset_hi_misc;
u32 ORB_offset_lo;
u8 command_set_dependent[24];
-};
+} __attribute__((packed));

/*
* Miscellaneous SBP2 related config rom defines