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author | Olaf Kirch <olaf.kirch@oracle.com> | 2007-12-13 12:43:21 -0600 |
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committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2008-01-11 18:28:20 -0600 |
commit | da32dd681f7a1a17073c42b375fc23cf73c92155 (patch) | |
tree | 5bdca9ef0806fbf09b13d2fc272cda24702f482c /drivers/scsi/iscsi_tcp.h | |
parent | 843c0a8a76078cf961b244b839683d0667313740 (diff) | |
download | op-kernel-dev-da32dd681f7a1a17073c42b375fc23cf73c92155.zip op-kernel-dev-da32dd681f7a1a17073c42b375fc23cf73c92155.tar.gz |
[SCSI] iscsi_tcp: rewrite recv path
Rewrite recv path. Fixes:
- data digest processing and error handling.
- ahs support.
Some fixups by Mike Christie
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.h | 66 |
1 files changed, 41 insertions, 25 deletions
diff --git a/drivers/scsi/iscsi_tcp.h b/drivers/scsi/iscsi_tcp.h index 7eba44d..f1c5411 100644 --- a/drivers/scsi/iscsi_tcp.h +++ b/drivers/scsi/iscsi_tcp.h @@ -24,13 +24,6 @@ #include <scsi/libiscsi.h> -/* Socket's Receive state machine */ -#define IN_PROGRESS_WAIT_HEADER 0x0 -#define IN_PROGRESS_HEADER_GATHER 0x1 -#define IN_PROGRESS_DATA_RECV 0x2 -#define IN_PROGRESS_DDIGEST_RECV 0x3 -#define IN_PROGRESS_PAD_RECV 0x4 - /* xmit state machine */ #define XMSTATE_IDLE 0x0 #define XMSTATE_CMD_HDR_INIT 0x1 @@ -54,41 +47,64 @@ struct crypto_hash; struct socket; +struct iscsi_tcp_conn; +struct iscsi_chunk; + +typedef int iscsi_chunk_done_fn_t(struct iscsi_tcp_conn *, + struct iscsi_chunk *); + +struct iscsi_chunk { + unsigned char *data; + unsigned int size; + unsigned int copied; + unsigned int total_size; + unsigned int total_copied; + + struct hash_desc *hash; + unsigned char recv_digest[ISCSI_DIGEST_SIZE]; + unsigned char digest[ISCSI_DIGEST_SIZE]; + unsigned int digest_len; + + struct scatterlist *sg; + void *sg_mapped; + unsigned int sg_offset; + unsigned int sg_index; + unsigned int sg_count; + + iscsi_chunk_done_fn_t *done; +}; /* Socket connection recieve helper */ struct iscsi_tcp_recv { struct iscsi_hdr *hdr; - struct sk_buff *skb; - int offset; - int len; - int hdr_offset; - int copy; - int copied; - int padding; - struct iscsi_cmd_task *ctask; /* current cmd in progress */ + struct iscsi_chunk chunk; + + /* Allocate buffer for BHS + AHS */ + uint32_t hdr_buf[64]; /* copied and flipped values */ int datalen; - int datadgst; - char zero_copy_hdr; +}; + +/* 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_tcp_conn { struct iscsi_conn *iscsi_conn; struct socket *sock; - struct iscsi_hdr hdr; /* header placeholder */ - char hdrext[4*sizeof(__u16) + - sizeof(__u32)]; - int data_copied; int stop_stage; /* conn_stop() flag: * * stop to recover, * * stop to terminate */ - /* iSCSI connection-wide sequencing */ - int hdr_size; /* PDU header size */ - /* control data */ struct iscsi_tcp_recv in; /* TCP receive context */ - int in_progress; /* connection state machine */ + struct iscsi_tcp_send out; /* TCP send context */ /* old values for socket callbacks */ void (*old_data_ready)(struct sock *, int); |