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authorOlaf Kirch <olaf.kirch@oracle.com>2007-12-13 21:43:35 +0300
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2008-01-12 03:28:42 +0300
commita8ac6311cc21d78fa284cd43f56df2063f536bf1 (patch)
treec408dcccab2854dd9dd1775b5971ea60b34127dd /drivers/scsi/iscsi_tcp.h
parent1040c99d9fd9de2bf00efae6d91014f890575bdb (diff)
downloadlinux-a8ac6311cc21d78fa284cd43f56df2063f536bf1.tar.xz
[SCSI] iscsi: convert xmit path to iscsi chunks
Convert xmit to iscsi chunks. from michaelc@cs.wisc.edu: Bug fixes, more digest integration, sg chaining conversion and other sg wrapper changes, coding style sync up, and removal of io fields, like pdu_sent, that are not needed. Signed-off-by: Olaf Kirch <olaf.kirch@oracle.com> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/scsi/iscsi_tcp.h')
-rw-r--r--drivers/scsi/iscsi_tcp.h75
1 files changed, 15 insertions, 60 deletions
diff --git a/drivers/scsi/iscsi_tcp.h b/drivers/scsi/iscsi_tcp.h
index d49d87611e82..893cd2e1701e 100644
--- a/drivers/scsi/iscsi_tcp.h
+++ b/drivers/scsi/iscsi_tcp.h
@@ -24,35 +24,18 @@
#include <scsi/libiscsi.h>
-/* xmit state machine */
-#define XMSTATE_IDLE 0x0
-#define XMSTATE_CMD_HDR_INIT 0x1
-#define XMSTATE_CMD_HDR_XMIT 0x2
-#define XMSTATE_IMM_HDR 0x4
-#define XMSTATE_IMM_DATA 0x8
-#define XMSTATE_UNS_INIT 0x10
-#define XMSTATE_UNS_HDR 0x20
-#define XMSTATE_UNS_DATA 0x40
-#define XMSTATE_SOL_HDR 0x80
-#define XMSTATE_SOL_DATA 0x100
-#define XMSTATE_W_PAD 0x200
-#define XMSTATE_W_RESEND_PAD 0x400
-#define XMSTATE_W_RESEND_DATA_DIGEST 0x800
-#define XMSTATE_IMM_HDR_INIT 0x1000
-#define XMSTATE_SOL_HDR_INIT 0x2000
-
#define ISCSI_SG_TABLESIZE SG_ALL
#define ISCSI_TCP_MAX_CMD_LEN 16
struct crypto_hash;
struct socket;
struct iscsi_tcp_conn;
-struct iscsi_chunk;
+struct iscsi_segment;
-typedef int iscsi_chunk_done_fn_t(struct iscsi_tcp_conn *,
- struct iscsi_chunk *);
+typedef int iscsi_segment_done_fn_t(struct iscsi_tcp_conn *,
+ struct iscsi_segment *);
-struct iscsi_chunk {
+struct iscsi_segment {
unsigned char *data;
unsigned int size;
unsigned int copied;
@@ -67,16 +50,14 @@ struct iscsi_chunk {
struct scatterlist *sg;
void *sg_mapped;
unsigned int sg_offset;
- unsigned int sg_index;
- unsigned int sg_count;
- iscsi_chunk_done_fn_t *done;
+ iscsi_segment_done_fn_t *done;
};
/* Socket connection recieve helper */
struct iscsi_tcp_recv {
struct iscsi_hdr *hdr;
- struct iscsi_chunk chunk;
+ struct iscsi_segment segment;
/* Allocate buffer for BHS + AHS */
uint32_t hdr_buf[64];
@@ -88,11 +69,8 @@ struct iscsi_tcp_recv {
/* Socket connection send helper */
struct iscsi_tcp_send {
struct iscsi_hdr *hdr;
- struct iscsi_chunk chunk;
- struct iscsi_chunk data_chunk;
-
- /* Allocate buffer for BHS + AHS */
- uint32_t hdr_buf[64];
+ struct iscsi_segment segment;
+ struct iscsi_segment data_segment;
};
struct iscsi_tcp_conn {
@@ -118,29 +96,19 @@ struct iscsi_tcp_conn {
uint32_t sendpage_failures_cnt;
uint32_t discontiguous_hdr_cnt;
- ssize_t (*sendpage)(struct socket *, struct page *, int, size_t, int);
-};
+ int error;
-struct iscsi_buf {
- struct scatterlist sg;
- unsigned int sent;
- char use_sendmsg;
+ ssize_t (*sendpage)(struct socket *, struct page *, int, size_t, int);
};
struct iscsi_data_task {
struct iscsi_data hdr; /* PDU */
char hdrext[ISCSI_DIGEST_SIZE];/* Header-Digest */
- struct iscsi_buf digestbuf; /* digest buffer */
- uint32_t digest; /* data digest */
};
struct iscsi_tcp_mgmt_task {
struct iscsi_hdr hdr;
char hdrext[ISCSI_DIGEST_SIZE]; /* Header-Digest */
- int xmstate; /* mgmt xmit progress */
- struct iscsi_buf headbuf; /* header buffer */
- struct iscsi_buf sendbuf; /* in progress buffer */
- int sent;
};
struct iscsi_r2t_info {
@@ -148,13 +116,10 @@ struct iscsi_r2t_info {
__be32 exp_statsn; /* copied from R2T */
uint32_t data_length; /* copied from R2T */
uint32_t data_offset; /* copied from R2T */
- struct iscsi_buf headbuf; /* Data-Out Header Buffer */
- struct iscsi_buf sendbuf; /* Data-Out in progress buffer*/
int sent; /* R2T sequence progress */
int data_count; /* DATA-Out payload progress */
- struct scatterlist *sg; /* per-R2T SG list */
int solicit_datasn;
- struct iscsi_data_task dtask; /* which data task */
+ struct iscsi_data_task dtask; /* Data-Out header buf */
};
struct iscsi_tcp_cmd_task {
@@ -163,24 +128,14 @@ struct iscsi_tcp_cmd_task {
char hdrextbuf[ISCSI_MAX_AHS_SIZE +
ISCSI_DIGEST_SIZE];
} hdr;
- char pad[ISCSI_PAD_LEN];
- int pad_count; /* padded bytes */
- struct iscsi_buf headbuf; /* header buf (xmit) */
- struct iscsi_buf sendbuf; /* in progress buffer*/
- int xmstate; /* xmit xtate machine */
+
int sent;
- struct scatterlist *sg; /* per-cmd SG list */
- struct scatterlist *bad_sg; /* assert statement */
- int sg_count; /* SG's to process */
- uint32_t exp_datasn; /* expected target's R2TSN/DataSN */
+ uint32_t exp_datasn; /* expected target's R2TSN/DataSN */
int data_offset;
- struct iscsi_r2t_info *r2t; /* in progress R2T */
+ struct iscsi_r2t_info *r2t; /* in progress R2T */
struct iscsi_pool r2tpool;
struct kfifo *r2tqueue;
- int digest_count;
- uint32_t immdigest; /* for imm data */
- struct iscsi_buf immbuf; /* for imm data digest */
- struct iscsi_data_task unsol_dtask; /* unsol data task */
+ struct iscsi_data_task unsol_dtask; /* Data-Out header buf */
};
#endif /* ISCSI_H */