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Commit 69110e3c authored by Herbert Xu's avatar Herbert Xu
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iscsi-target: Use shash and ahash 

This patch replaces uses of the long obsolete hash interface with
either shash (for non-SG users) or ahash.
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 5d6ac29b
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Showing with 113 additions and 120 deletions
drivers/target/iscsi/iscsi_target.c
View file @ 69110e3c
......@@ -16,9 +16,9 @@
* GNU General Public License for more details.
******************************************************************************/
#include <crypto/hash.h>
#include <linux/string.h>
#include <linux/kthread.h>
#include <linux/crypto.h>
#include <linux/completion.h>
#include <linux/module.h>
#include <linux/vmalloc.h>
......@@ -1190,7 +1190,7 @@ iscsit_handle_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
}
static u32 iscsit_do_crypto_hash_sg(
struct hash_desc *hash,
struct ahash_request *hash,
struct iscsi_cmd *cmd,
u32 data_offset,
u32 data_length,
......@@ -1201,7 +1201,7 @@ static u32 iscsit_do_crypto_hash_sg(
struct scatterlist *sg;
unsigned int page_off;
crypto_hash_init(hash);
crypto_ahash_init(hash);
sg = cmd->first_data_sg;
page_off = cmd->first_data_sg_off;
......@@ -1209,7 +1209,8 @@ static u32 iscsit_do_crypto_hash_sg(
while (data_length) {
u32 cur_len = min_t(u32, data_length, (sg->length - page_off));
crypto_hash_update(hash, sg, cur_len);
ahash_request_set_crypt(hash, sg, NULL, cur_len);
crypto_ahash_update(hash);
data_length -= cur_len;
page_off = 0;
......@@ -1221,33 +1222,34 @@ static u32 iscsit_do_crypto_hash_sg(
struct scatterlist pad_sg;
sg_init_one(&pad_sg, pad_bytes, padding);
crypto_hash_update(hash, &pad_sg, padding);
ahash_request_set_crypt(hash, &pad_sg, (u8 *)&data_crc,
padding);
crypto_ahash_finup(hash);
} else {
ahash_request_set_crypt(hash, NULL, (u8 *)&data_crc, 0);
crypto_ahash_final(hash);
}
crypto_hash_final(hash, (u8 *) &data_crc);
return data_crc;
}
static void iscsit_do_crypto_hash_buf(
struct hash_desc *hash,
struct ahash_request *hash,
const void *buf,
u32 payload_length,
u32 padding,
u8 *pad_bytes,
u8 *data_crc)
{
struct scatterlist sg;
struct scatterlist sg[2];
crypto_hash_init(hash);
sg_init_table(sg, ARRAY_SIZE(sg));
sg_set_buf(sg, buf, payload_length);
sg_set_buf(sg + 1, pad_bytes, padding);
sg_init_one(&sg, buf, payload_length);
crypto_hash_update(hash, &sg, payload_length);
ahash_request_set_crypt(hash, sg, data_crc, payload_length + padding);
if (padding) {
sg_init_one(&sg, pad_bytes, padding);
crypto_hash_update(hash, &sg, padding);
}
crypto_hash_final(hash, data_crc);
crypto_ahash_digest(hash);
}
int
......@@ -1422,7 +1424,7 @@ iscsit_get_dataout(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
if (conn->conn_ops->DataDigest) {
u32 data_crc;
data_crc = iscsit_do_crypto_hash_sg(&conn->conn_rx_hash, cmd,
data_crc = iscsit_do_crypto_hash_sg(conn->conn_rx_hash, cmd,
be32_to_cpu(hdr->offset),
payload_length, padding,
cmd->pad_bytes);
......@@ -1682,7 +1684,7 @@ static int iscsit_handle_nop_out(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
}
if (conn->conn_ops->DataDigest) {
iscsit_do_crypto_hash_buf(&conn->conn_rx_hash,
iscsit_do_crypto_hash_buf(conn->conn_rx_hash,
ping_data, payload_length,
padding, cmd->pad_bytes,
(u8 *)&data_crc);
......@@ -2101,7 +2103,7 @@ iscsit_handle_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
goto reject;
if (conn->conn_ops->DataDigest) {
iscsit_do_crypto_hash_buf(&conn->conn_rx_hash,
iscsit_do_crypto_hash_buf(conn->conn_rx_hash,
text_in, payload_length,
padding, (u8 *)&pad_bytes,
(u8 *)&data_crc);
......@@ -2440,7 +2442,7 @@ static int iscsit_handle_immediate_data(
if (conn->conn_ops->DataDigest) {
u32 data_crc;
data_crc = iscsit_do_crypto_hash_sg(&conn->conn_rx_hash, cmd,
data_crc = iscsit_do_crypto_hash_sg(conn->conn_rx_hash, cmd,
cmd->write_data_done, length, padding,
cmd->pad_bytes);
......@@ -2553,7 +2555,7 @@ static int iscsit_send_conn_drop_async_message(
if (conn->conn_ops->HeaderDigest) {
u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr,
iscsit_do_crypto_hash_buf(conn->conn_tx_hash, hdr,
ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest);
cmd->tx_size += ISCSI_CRC_LEN;
......@@ -2683,7 +2685,7 @@ static int iscsit_send_datain(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
if (conn->conn_ops->HeaderDigest) {
u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, cmd->pdu,
iscsit_do_crypto_hash_buf(conn->conn_tx_hash, cmd->pdu,
ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest);
iov[0].iov_len += ISCSI_CRC_LEN;
......@@ -2711,7 +2713,7 @@ static int iscsit_send_datain(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
cmd->padding);
}
if (conn->conn_ops->DataDigest) {
cmd->data_crc = iscsit_do_crypto_hash_sg(&conn->conn_tx_hash, cmd,
cmd->data_crc = iscsit_do_crypto_hash_sg(conn->conn_tx_hash, cmd,
datain.offset, datain.length, cmd->padding, cmd->pad_bytes);
iov[iov_count].iov_base = &cmd->data_crc;
......@@ -2857,7 +2859,7 @@ iscsit_send_logout(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
if (conn->conn_ops->HeaderDigest) {
u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, &cmd->pdu[0],
iscsit_do_crypto_hash_buf(conn->conn_tx_hash, &cmd->pdu[0],
ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest);
iov[0].iov_len += ISCSI_CRC_LEN;
......@@ -2915,7 +2917,7 @@ static int iscsit_send_unsolicited_nopin(
if (conn->conn_ops->HeaderDigest) {
u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr,
iscsit_do_crypto_hash_buf(conn->conn_tx_hash, hdr,
ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest);
tx_size += ISCSI_CRC_LEN;
......@@ -2963,7 +2965,7 @@ iscsit_send_nopin(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
if (conn->conn_ops->HeaderDigest) {
u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr,
iscsit_do_crypto_hash_buf(conn->conn_tx_hash, hdr,
ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest);
iov[0].iov_len += ISCSI_CRC_LEN;
......@@ -2993,7 +2995,7 @@ iscsit_send_nopin(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
" padding bytes.\n", padding);
}
if (conn->conn_ops->DataDigest) {
iscsit_do_crypto_hash_buf(&conn->conn_tx_hash,
iscsit_do_crypto_hash_buf(conn->conn_tx_hash,
cmd->buf_ptr, cmd->buf_ptr_size,
padding, (u8 *)&cmd->pad_bytes,
(u8 *)&cmd->data_crc);
......@@ -3049,7 +3051,7 @@ static int iscsit_send_r2t(
if (conn->conn_ops->HeaderDigest) {
u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr,
iscsit_do_crypto_hash_buf(conn->conn_tx_hash, hdr,
ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest);
cmd->iov_misc[0].iov_len += ISCSI_CRC_LEN;
......@@ -3239,7 +3241,7 @@ static int iscsit_send_response(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
}
if (conn->conn_ops->DataDigest) {
iscsit_do_crypto_hash_buf(&conn->conn_tx_hash,
iscsit_do_crypto_hash_buf(conn->conn_tx_hash,
cmd->sense_buffer,
(cmd->se_cmd.scsi_sense_length + padding),
0, NULL, (u8 *)&cmd->data_crc);
......@@ -3262,7 +3264,7 @@ static int iscsit_send_response(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
if (conn->conn_ops->HeaderDigest) {
u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, cmd->pdu,
iscsit_do_crypto_hash_buf(conn->conn_tx_hash, cmd->pdu,
ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest);
iov[0].iov_len += ISCSI_CRC_LEN;
......@@ -3332,7 +3334,7 @@ iscsit_send_task_mgt_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
if (conn->conn_ops->HeaderDigest) {
u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr,
iscsit_do_crypto_hash_buf(conn->conn_tx_hash, hdr,
ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest);
cmd->iov_misc[0].iov_len += ISCSI_CRC_LEN;
......@@ -3601,7 +3603,7 @@ static int iscsit_send_text_rsp(
if (conn->conn_ops->HeaderDigest) {
u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr,
iscsit_do_crypto_hash_buf(conn->conn_tx_hash, hdr,
ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest);
iov[0].iov_len += ISCSI_CRC_LEN;
......@@ -3611,7 +3613,7 @@ static int iscsit_send_text_rsp(
}
if (conn->conn_ops->DataDigest) {
iscsit_do_crypto_hash_buf(&conn->conn_tx_hash,
iscsit_do_crypto_hash_buf(conn->conn_tx_hash,
cmd->buf_ptr, text_length,
0, NULL, (u8 *)&cmd->data_crc);
......@@ -3668,7 +3670,7 @@ static int iscsit_send_reject(
if (conn->conn_ops->HeaderDigest) {
u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr,
iscsit_do_crypto_hash_buf(conn->conn_tx_hash, hdr,
ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest);
iov[0].iov_len += ISCSI_CRC_LEN;
......@@ -3678,7 +3680,7 @@ static int iscsit_send_reject(
}
if (conn->conn_ops->DataDigest) {
iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, cmd->buf_ptr,
iscsit_do_crypto_hash_buf(conn->conn_tx_hash, cmd->buf_ptr,
ISCSI_HDR_LEN, 0, NULL, (u8 *)&cmd->data_crc);
iov[iov_count].iov_base = &cmd->data_crc;
......@@ -4145,7 +4147,7 @@ int iscsi_target_rx_thread(void *arg)
goto transport_err;
}
iscsit_do_crypto_hash_buf(&conn->conn_rx_hash,
iscsit_do_crypto_hash_buf(conn->conn_rx_hash,
buffer, ISCSI_HDR_LEN,
0, NULL, (u8 *)&checksum);
......@@ -4359,10 +4361,14 @@ int iscsit_close_connection(
*/
iscsit_check_conn_usage_count(conn);
if (conn->conn_rx_hash.tfm)
crypto_free_hash(conn->conn_rx_hash.tfm);
if (conn->conn_tx_hash.tfm)
crypto_free_hash(conn->conn_tx_hash.tfm);
ahash_request_free(conn->conn_tx_hash);
if (conn->conn_rx_hash) {
struct crypto_ahash *tfm;
tfm = crypto_ahash_reqtfm(conn->conn_rx_hash);
ahash_request_free(conn->conn_rx_hash);
crypto_free_ahash(tfm);
}
free_cpumask_var(conn->conn_cpumask);
......
drivers/target/iscsi/iscsi_target_auth.c
View file @ 69110e3c
......@@ -16,9 +16,9 @@
* GNU General Public License for more details.
******************************************************************************/
#include <crypto/hash.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/crypto.h>
#include <linux/err.h>
#include <linux/scatterlist.h>
......@@ -185,9 +185,8 @@ static int chap_server_compute_md5(
unsigned char chap_n[MAX_CHAP_N_SIZE], chap_r[MAX_RESPONSE_LENGTH];
size_t compare_len;
struct iscsi_chap *chap = conn->auth_protocol;
struct crypto_hash *tfm;
struct hash_desc desc;
struct scatterlist sg;
struct crypto_shash *tfm = NULL;
struct shash_desc *desc = NULL;
int auth_ret = -1, ret, challenge_len;
memset(identifier, 0, 10);
......@@ -245,52 +244,47 @@ static int chap_server_compute_md5(
pr_debug("[server] Got CHAP_R=%s\n", chap_r);
chap_string_to_hex(client_digest, chap_r, strlen(chap_r));
tfm = crypto_alloc_hash("md5", 0, CRYPTO_ALG_ASYNC);
tfm = crypto_alloc_shash("md5", 0, 0);
if (IS_ERR(tfm)) {
pr_err("Unable to allocate struct crypto_hash\n");
tfm = NULL;
pr_err("Unable to allocate struct crypto_shash\n");
goto out;
}
desc.tfm = tfm;
desc.flags = 0;
ret = crypto_hash_init(&desc);
if (ret < 0) {
pr_err("crypto_hash_init() failed\n");
crypto_free_hash(tfm);
desc = kmalloc(sizeof(*desc) + crypto_shash_descsize(tfm), GFP_KERNEL);
if (!desc) {
pr_err("Unable to allocate struct shash_desc\n");
goto out;
}
sg_init_one(&sg, &chap->id, 1);
ret = crypto_hash_update(&desc, &sg, 1);
desc->tfm = tfm;
desc->flags = 0;
ret = crypto_shash_init(desc);
if (ret < 0) {
pr_err("crypto_hash_update() failed for id\n");
crypto_free_hash(tfm);
pr_err("crypto_shash_init() failed\n");
goto out;
}
sg_init_one(&sg, &auth->password, strlen(auth->password));
ret = crypto_hash_update(&desc, &sg, strlen(auth->password));
ret = crypto_shash_update(desc, &chap->id, 1);
if (ret < 0) {
pr_err("crypto_hash_update() failed for password\n");
crypto_free_hash(tfm);
pr_err("crypto_shash_update() failed for id\n");
goto out;
}
sg_init_one(&sg, chap->challenge, CHAP_CHALLENGE_LENGTH);
ret = crypto_hash_update(&desc, &sg, CHAP_CHALLENGE_LENGTH);
ret = crypto_shash_update(desc, (char *)&auth->password,
strlen(auth->password));
if (ret < 0) {
pr_err("crypto_hash_update() failed for challenge\n");
crypto_free_hash(tfm);
pr_err("crypto_shash_update() failed for password\n");
goto out;
}
ret = crypto_hash_final(&desc, server_digest);
ret = crypto_shash_finup(desc, chap->challenge,
CHAP_CHALLENGE_LENGTH, server_digest);
if (ret < 0) {
pr_err("crypto_hash_final() failed for server digest\n");
crypto_free_hash(tfm);
pr_err("crypto_shash_finup() failed for challenge\n");
goto out;
}
crypto_free_hash(tfm);
chap_binaryhex_to_asciihex(response, server_digest, MD5_SIGNATURE_SIZE);
pr_debug("[server] MD5 Server Digest: %s\n", response);
......@@ -306,9 +300,8 @@ static int chap_server_compute_md5(
* authentication is not enabled.
*/
if (!auth->authenticate_target) {
kfree(challenge);
kfree(challenge_binhex);
return 0;
auth_ret = 0;
goto out;
}
/*
* Get CHAP_I.
......@@ -372,58 +365,37 @@ static int chap_server_compute_md5(
/*
* Generate CHAP_N and CHAP_R for mutual authentication.
*/
tfm = crypto_alloc_hash("md5", 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(tfm)) {
pr_err("Unable to allocate struct crypto_hash\n");
goto out;
}
desc.tfm = tfm;
desc.flags = 0;
ret = crypto_hash_init(&desc);
ret = crypto_shash_init(desc);
if (ret < 0) {
pr_err("crypto_hash_init() failed\n");
crypto_free_hash(tfm);
pr_err("crypto_shash_init() failed\n");
goto out;
}
/* To handle both endiannesses */
id_as_uchar = id;
sg_init_one(&sg, &id_as_uchar, 1);
ret = crypto_hash_update(&desc, &sg, 1);
ret = crypto_shash_update(desc, &id_as_uchar, 1);
if (ret < 0) {
pr_err("crypto_hash_update() failed for id\n");
crypto_free_hash(tfm);
pr_err("crypto_shash_update() failed for id\n");
goto out;
}
sg_init_one(&sg, auth->password_mutual,
ret = crypto_shash_update(desc, auth->password_mutual,
strlen(auth->password_mutual));
ret = crypto_hash_update(&desc, &sg, strlen(auth->password_mutual));
if (ret < 0) {
pr_err("crypto_hash_update() failed for"
pr_err("crypto_shash_update() failed for"
" password_mutual\n");
crypto_free_hash(tfm);
goto out;
}
/*
* Convert received challenge to binary hex.
*/
sg_init_one(&sg, challenge_binhex, challenge_len);
ret = crypto_hash_update(&desc, &sg, challenge_len);
ret = crypto_shash_finup(desc, challenge_binhex, challenge_len,
digest);
if (ret < 0) {
pr_err("crypto_hash_update() failed for ma challenge\n");
crypto_free_hash(tfm);
pr_err("crypto_shash_finup() failed for ma challenge\n");
goto out;
}
ret = crypto_hash_final(&desc, digest);
if (ret < 0) {
pr_err("crypto_hash_final() failed for ma digest\n");
crypto_free_hash(tfm);
goto out;
}
crypto_free_hash(tfm);
/*
* Generate CHAP_N and CHAP_R.
*/
......@@ -440,6 +412,8 @@ static int chap_server_compute_md5(
pr_debug("[server] Sending CHAP_R=0x%s\n", response);
auth_ret = 0;
out:
kzfree(desc);
crypto_free_shash(tfm);
kfree(challenge);
kfree(challenge_binhex);
return auth_ret;
......
drivers/target/iscsi/iscsi_target_login.c
View file @ 69110e3c
......@@ -16,9 +16,9 @@
* GNU General Public License for more details.
******************************************************************************/
#include <crypto/hash.h>
#include <linux/string.h>
#include <linux/kthread.h>
#include <linux/crypto.h>
#include <linux/idr.h>
#include <scsi/iscsi_proto.h>
#include <target/target_core_base.h>
......@@ -115,27 +115,36 @@ static struct iscsi_login *iscsi_login_init_conn(struct iscsi_conn *conn)
*/
int iscsi_login_setup_crypto(struct iscsi_conn *conn)
{
struct crypto_ahash *tfm;
/*
* Setup slicing by CRC32C algorithm for RX and TX libcrypto contexts
* which will default to crc32c_intel.ko for cpu_has_xmm4_2, or fallback
* to software 1x8 byte slicing from crc32c.ko
*/
conn->conn_rx_hash.flags = 0;
conn->conn_rx_hash.tfm = crypto_alloc_hash("crc32c", 0,
CRYPTO_ALG_ASYNC);
if (IS_ERR(conn->conn_rx_hash.tfm)) {
pr_err("crypto_alloc_hash() failed for conn_rx_tfm\n");
tfm = crypto_alloc_ahash("crc32c", 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(tfm)) {
pr_err("crypto_alloc_ahash() failed\n");
return -ENOMEM;
}
conn->conn_rx_hash = ahash_request_alloc(tfm, GFP_KERNEL);
if (!conn->conn_rx_hash) {
pr_err("ahash_request_alloc() failed for conn_rx_hash\n");
crypto_free_ahash(tfm);
return -ENOMEM;
}
ahash_request_set_callback(conn->conn_rx_hash, 0, NULL, NULL);
conn->conn_tx_hash.flags = 0;
conn->conn_tx_hash.tfm = crypto_alloc_hash("crc32c", 0,
CRYPTO_ALG_ASYNC);
if (IS_ERR(conn->conn_tx_hash.tfm)) {
pr_err("crypto_alloc_hash() failed for conn_tx_tfm\n");
crypto_free_hash(conn->conn_rx_hash.tfm);
conn->conn_tx_hash = ahash_request_alloc(tfm, GFP_KERNEL);
if (!conn->conn_tx_hash) {
pr_err("ahash_request_alloc() failed for conn_tx_hash\n");
ahash_request_free(conn->conn_rx_hash);
conn->conn_rx_hash = NULL;
crypto_free_ahash(tfm);
return -ENOMEM;
}
ahash_request_set_callback(conn->conn_tx_hash, 0, NULL, NULL);
return 0;
}
......@@ -1174,10 +1183,14 @@ void iscsi_target_login_sess_out(struct iscsi_conn *conn,
iscsit_dec_session_usage_count(conn->sess);
}
if (!IS_ERR(conn->conn_rx_hash.tfm))
crypto_free_hash(conn->conn_rx_hash.tfm);
if (!IS_ERR(conn->conn_tx_hash.tfm))
crypto_free_hash(conn->conn_tx_hash.tfm);
ahash_request_free(conn->conn_tx_hash);
if (conn->conn_rx_hash) {
struct crypto_ahash *tfm;
tfm = crypto_ahash_reqtfm(conn->conn_rx_hash);
ahash_request_free(conn->conn_rx_hash);
crypto_free_ahash(tfm);
}
free_cpumask_var(conn->conn_cpumask);
......
include/target/iscsi/iscsi_target_core.h
View file @ 69110e3c
......@@ -570,8 +570,8 @@ struct iscsi_conn {
spinlock_t response_queue_lock;
spinlock_t state_lock;
/* libcrypto RX and TX contexts for crc32c */
struct hash_desc conn_rx_hash;
struct hash_desc conn_tx_hash;
struct ahash_request *conn_rx_hash;
struct ahash_request *conn_tx_hash;
/* Used for scheduling TX and RX connection kthreads */
cpumask_var_t conn_cpumask;
unsigned int conn_rx_reset_cpumask:1;
......
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