^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2017, Microsoft Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Author(s): Long Li <longli@microsoft.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/highmem.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include "smbdirect.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include "cifs_debug.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include "cifsproto.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include "smb2proto.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) static struct smbd_response *get_empty_queue_buffer(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) struct smbd_connection *info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) static struct smbd_response *get_receive_buffer(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) struct smbd_connection *info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) static void put_receive_buffer(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) struct smbd_connection *info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) struct smbd_response *response);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) static int allocate_receive_buffers(struct smbd_connection *info, int num_buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) static void destroy_receive_buffers(struct smbd_connection *info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) static void put_empty_packet(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) struct smbd_connection *info, struct smbd_response *response);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static void enqueue_reassembly(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) struct smbd_connection *info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) struct smbd_response *response, int data_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) static struct smbd_response *_get_first_reassembly(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) struct smbd_connection *info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) static int smbd_post_recv(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) struct smbd_connection *info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) struct smbd_response *response);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) static int smbd_post_send_empty(struct smbd_connection *info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) static int smbd_post_send_data(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) struct smbd_connection *info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) struct kvec *iov, int n_vec, int remaining_data_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) static int smbd_post_send_page(struct smbd_connection *info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) struct page *page, unsigned long offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) size_t size, int remaining_data_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) static void destroy_mr_list(struct smbd_connection *info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static int allocate_mr_list(struct smbd_connection *info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) /* SMBD version number */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #define SMBD_V1 0x0100
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) /* Port numbers for SMBD transport */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #define SMB_PORT 445
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #define SMBD_PORT 5445
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) /* Address lookup and resolve timeout in ms */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #define RDMA_RESOLVE_TIMEOUT 5000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) /* SMBD negotiation timeout in seconds */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #define SMBD_NEGOTIATE_TIMEOUT 120
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) /* SMBD minimum receive size and fragmented sized defined in [MS-SMBD] */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) #define SMBD_MIN_RECEIVE_SIZE 128
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #define SMBD_MIN_FRAGMENTED_SIZE 131072
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) * Default maximum number of RDMA read/write outstanding on this connection
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) * This value is possibly decreased during QP creation on hardware limit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) #define SMBD_CM_RESPONDER_RESOURCES 32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) /* Maximum number of retries on data transfer operations */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) #define SMBD_CM_RETRY 6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) /* No need to retry on Receiver Not Ready since SMBD manages credits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) #define SMBD_CM_RNR_RETRY 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) * User configurable initial values per SMBD transport connection
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) * as defined in [MS-SMBD] 3.1.1.1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) * Those may change after a SMBD negotiation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) /* The local peer's maximum number of credits to grant to the peer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) int smbd_receive_credit_max = 255;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) /* The remote peer's credit request of local peer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) int smbd_send_credit_target = 255;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) /* The maximum single message size can be sent to remote peer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) int smbd_max_send_size = 1364;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) /* The maximum fragmented upper-layer payload receive size supported */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) int smbd_max_fragmented_recv_size = 1024 * 1024;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) /* The maximum single-message size which can be received */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) int smbd_max_receive_size = 8192;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) /* The timeout to initiate send of a keepalive message on idle */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) int smbd_keep_alive_interval = 120;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) * User configurable initial values for RDMA transport
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) * The actual values used may be lower and are limited to hardware capabilities
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) /* Default maximum number of SGEs in a RDMA write/read */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) int smbd_max_frmr_depth = 2048;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) /* If payload is less than this byte, use RDMA send/recv not read/write */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) int rdma_readwrite_threshold = 4096;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) /* Transport logging functions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) * Logging are defined as classes. They can be OR'ed to define the actual
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) * logging level via module parameter smbd_logging_class
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) * e.g. cifs.smbd_logging_class=0xa0 will log all log_rdma_recv() and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) * log_rdma_event()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) #define LOG_OUTGOING 0x1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) #define LOG_INCOMING 0x2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) #define LOG_READ 0x4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) #define LOG_WRITE 0x8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) #define LOG_RDMA_SEND 0x10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) #define LOG_RDMA_RECV 0x20
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) #define LOG_KEEP_ALIVE 0x40
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) #define LOG_RDMA_EVENT 0x80
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) #define LOG_RDMA_MR 0x100
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) static unsigned int smbd_logging_class;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) module_param(smbd_logging_class, uint, 0644);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) MODULE_PARM_DESC(smbd_logging_class,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) "Logging class for SMBD transport 0x0 to 0x100");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) #define ERR 0x0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) #define INFO 0x1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) static unsigned int smbd_logging_level = ERR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) module_param(smbd_logging_level, uint, 0644);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) MODULE_PARM_DESC(smbd_logging_level,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) "Logging level for SMBD transport, 0 (default): error, 1: info");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) #define log_rdma(level, class, fmt, args...) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) do { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) if (level <= smbd_logging_level || class & smbd_logging_class) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) cifs_dbg(VFS, "%s:%d " fmt, __func__, __LINE__, ##args);\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) #define log_outgoing(level, fmt, args...) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) log_rdma(level, LOG_OUTGOING, fmt, ##args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) #define log_incoming(level, fmt, args...) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) log_rdma(level, LOG_INCOMING, fmt, ##args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) #define log_read(level, fmt, args...) log_rdma(level, LOG_READ, fmt, ##args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) #define log_write(level, fmt, args...) log_rdma(level, LOG_WRITE, fmt, ##args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) #define log_rdma_send(level, fmt, args...) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) log_rdma(level, LOG_RDMA_SEND, fmt, ##args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) #define log_rdma_recv(level, fmt, args...) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) log_rdma(level, LOG_RDMA_RECV, fmt, ##args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) #define log_keep_alive(level, fmt, args...) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) log_rdma(level, LOG_KEEP_ALIVE, fmt, ##args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) #define log_rdma_event(level, fmt, args...) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) log_rdma(level, LOG_RDMA_EVENT, fmt, ##args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) #define log_rdma_mr(level, fmt, args...) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) log_rdma(level, LOG_RDMA_MR, fmt, ##args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) static void smbd_disconnect_rdma_work(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) struct smbd_connection *info =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) container_of(work, struct smbd_connection, disconnect_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) if (info->transport_status == SMBD_CONNECTED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) info->transport_status = SMBD_DISCONNECTING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) rdma_disconnect(info->id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) static void smbd_disconnect_rdma_connection(struct smbd_connection *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) queue_work(info->workqueue, &info->disconnect_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) /* Upcall from RDMA CM */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) static int smbd_conn_upcall(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) struct rdma_cm_id *id, struct rdma_cm_event *event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) struct smbd_connection *info = id->context;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) log_rdma_event(INFO, "event=%d status=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) event->event, event->status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) switch (event->event) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) case RDMA_CM_EVENT_ADDR_RESOLVED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) case RDMA_CM_EVENT_ROUTE_RESOLVED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) info->ri_rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) complete(&info->ri_done);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) case RDMA_CM_EVENT_ADDR_ERROR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) info->ri_rc = -EHOSTUNREACH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) complete(&info->ri_done);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) case RDMA_CM_EVENT_ROUTE_ERROR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) info->ri_rc = -ENETUNREACH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) complete(&info->ri_done);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) case RDMA_CM_EVENT_ESTABLISHED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) log_rdma_event(INFO, "connected event=%d\n", event->event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) info->transport_status = SMBD_CONNECTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) wake_up_interruptible(&info->conn_wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) case RDMA_CM_EVENT_CONNECT_ERROR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) case RDMA_CM_EVENT_UNREACHABLE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) case RDMA_CM_EVENT_REJECTED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) log_rdma_event(INFO, "connecting failed event=%d\n", event->event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) info->transport_status = SMBD_DISCONNECTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) wake_up_interruptible(&info->conn_wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) case RDMA_CM_EVENT_DEVICE_REMOVAL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) case RDMA_CM_EVENT_DISCONNECTED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) /* This happenes when we fail the negotiation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) if (info->transport_status == SMBD_NEGOTIATE_FAILED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) info->transport_status = SMBD_DISCONNECTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) wake_up(&info->conn_wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) info->transport_status = SMBD_DISCONNECTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) wake_up_interruptible(&info->disconn_wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) wake_up_interruptible(&info->wait_reassembly_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) wake_up_interruptible_all(&info->wait_send_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) /* Upcall from RDMA QP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) smbd_qp_async_error_upcall(struct ib_event *event, void *context)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) struct smbd_connection *info = context;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) log_rdma_event(ERR, "%s on device %s info %p\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) ib_event_msg(event->event), event->device->name, info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) switch (event->event) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) case IB_EVENT_CQ_ERR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) case IB_EVENT_QP_FATAL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) smbd_disconnect_rdma_connection(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) static inline void *smbd_request_payload(struct smbd_request *request)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) return (void *)request->packet;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) static inline void *smbd_response_payload(struct smbd_response *response)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) return (void *)response->packet;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) /* Called when a RDMA send is done */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) static void send_done(struct ib_cq *cq, struct ib_wc *wc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) struct smbd_request *request =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) container_of(wc->wr_cqe, struct smbd_request, cqe);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) log_rdma_send(INFO, "smbd_request %p completed wc->status=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) request, wc->status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) if (wc->status != IB_WC_SUCCESS || wc->opcode != IB_WC_SEND) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) log_rdma_send(ERR, "wc->status=%d wc->opcode=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) wc->status, wc->opcode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) smbd_disconnect_rdma_connection(request->info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) for (i = 0; i < request->num_sge; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) ib_dma_unmap_single(request->info->id->device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) request->sge[i].addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) request->sge[i].length,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) DMA_TO_DEVICE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) if (atomic_dec_and_test(&request->info->send_pending))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) wake_up(&request->info->wait_send_pending);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) wake_up(&request->info->wait_post_send);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) mempool_free(request, request->info->request_mempool);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) static void dump_smbd_negotiate_resp(struct smbd_negotiate_resp *resp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) log_rdma_event(INFO, "resp message min_version %u max_version %u negotiated_version %u credits_requested %u credits_granted %u status %u max_readwrite_size %u preferred_send_size %u max_receive_size %u max_fragmented_size %u\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) resp->min_version, resp->max_version,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) resp->negotiated_version, resp->credits_requested,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) resp->credits_granted, resp->status,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) resp->max_readwrite_size, resp->preferred_send_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) resp->max_receive_size, resp->max_fragmented_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) * Process a negotiation response message, according to [MS-SMBD]3.1.5.7
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) * response, packet_length: the negotiation response message
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) * return value: true if negotiation is a success, false if failed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) static bool process_negotiation_response(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) struct smbd_response *response, int packet_length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) struct smbd_connection *info = response->info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) struct smbd_negotiate_resp *packet = smbd_response_payload(response);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) if (packet_length < sizeof(struct smbd_negotiate_resp)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) log_rdma_event(ERR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) "error: packet_length=%d\n", packet_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) if (le16_to_cpu(packet->negotiated_version) != SMBD_V1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) log_rdma_event(ERR, "error: negotiated_version=%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) le16_to_cpu(packet->negotiated_version));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) info->protocol = le16_to_cpu(packet->negotiated_version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) if (packet->credits_requested == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) log_rdma_event(ERR, "error: credits_requested==0\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) info->receive_credit_target = le16_to_cpu(packet->credits_requested);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) if (packet->credits_granted == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) log_rdma_event(ERR, "error: credits_granted==0\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) atomic_set(&info->send_credits, le16_to_cpu(packet->credits_granted));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) atomic_set(&info->receive_credits, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) if (le32_to_cpu(packet->preferred_send_size) > info->max_receive_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) log_rdma_event(ERR, "error: preferred_send_size=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) le32_to_cpu(packet->preferred_send_size));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) info->max_receive_size = le32_to_cpu(packet->preferred_send_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) if (le32_to_cpu(packet->max_receive_size) < SMBD_MIN_RECEIVE_SIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) log_rdma_event(ERR, "error: max_receive_size=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) le32_to_cpu(packet->max_receive_size));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) info->max_send_size = min_t(int, info->max_send_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) le32_to_cpu(packet->max_receive_size));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) if (le32_to_cpu(packet->max_fragmented_size) <
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) SMBD_MIN_FRAGMENTED_SIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) log_rdma_event(ERR, "error: max_fragmented_size=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) le32_to_cpu(packet->max_fragmented_size));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) info->max_fragmented_send_size =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) le32_to_cpu(packet->max_fragmented_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) info->rdma_readwrite_threshold =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) rdma_readwrite_threshold > info->max_fragmented_send_size ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) info->max_fragmented_send_size :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) rdma_readwrite_threshold;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) info->max_readwrite_size = min_t(u32,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) le32_to_cpu(packet->max_readwrite_size),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) info->max_frmr_depth * PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) info->max_frmr_depth = info->max_readwrite_size / PAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) static void smbd_post_send_credits(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) int use_receive_queue = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) struct smbd_response *response;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) struct smbd_connection *info =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) container_of(work, struct smbd_connection,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) post_send_credits_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) if (info->transport_status != SMBD_CONNECTED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) wake_up(&info->wait_receive_queues);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) if (info->receive_credit_target >
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) atomic_read(&info->receive_credits)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) while (true) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) if (use_receive_queue)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) response = get_receive_buffer(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) response = get_empty_queue_buffer(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) if (!response) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) /* now switch to emtpy packet queue */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) if (use_receive_queue) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) use_receive_queue = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) response->type = SMBD_TRANSFER_DATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) response->first_segment = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) rc = smbd_post_recv(info, response);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) log_rdma_recv(ERR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) "post_recv failed rc=%d\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) put_receive_buffer(info, response);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) ret++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) spin_lock(&info->lock_new_credits_offered);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) info->new_credits_offered += ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) spin_unlock(&info->lock_new_credits_offered);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) /* Promptly send an immediate packet as defined in [MS-SMBD] 3.1.1.1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) info->send_immediate = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) if (atomic_read(&info->receive_credits) <
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) info->receive_credit_target - 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) if (info->keep_alive_requested == KEEP_ALIVE_PENDING ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) info->send_immediate) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) log_keep_alive(INFO, "send an empty message\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) smbd_post_send_empty(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) /* Called from softirq, when recv is done */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) static void recv_done(struct ib_cq *cq, struct ib_wc *wc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) struct smbd_data_transfer *data_transfer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) struct smbd_response *response =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) container_of(wc->wr_cqe, struct smbd_response, cqe);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) struct smbd_connection *info = response->info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) int data_length = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) log_rdma_recv(INFO, "response=%p type=%d wc status=%d wc opcode %d byte_len=%d pkey_index=%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) response, response->type, wc->status, wc->opcode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) wc->byte_len, wc->pkey_index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) if (wc->status != IB_WC_SUCCESS || wc->opcode != IB_WC_RECV) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) log_rdma_recv(INFO, "wc->status=%d opcode=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) wc->status, wc->opcode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) smbd_disconnect_rdma_connection(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) ib_dma_sync_single_for_cpu(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) wc->qp->device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) response->sge.addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) response->sge.length,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) DMA_FROM_DEVICE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) switch (response->type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) /* SMBD negotiation response */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) case SMBD_NEGOTIATE_RESP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) dump_smbd_negotiate_resp(smbd_response_payload(response));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) info->full_packet_received = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) info->negotiate_done =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) process_negotiation_response(response, wc->byte_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) complete(&info->negotiate_completion);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) /* SMBD data transfer packet */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) case SMBD_TRANSFER_DATA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) data_transfer = smbd_response_payload(response);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) data_length = le32_to_cpu(data_transfer->data_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) * If this is a packet with data playload place the data in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) * reassembly queue and wake up the reading thread
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) if (data_length) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) if (info->full_packet_received)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) response->first_segment = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) if (le32_to_cpu(data_transfer->remaining_data_length))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) info->full_packet_received = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) info->full_packet_received = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) enqueue_reassembly(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) response,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) data_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) put_empty_packet(info, response);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) if (data_length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) wake_up_interruptible(&info->wait_reassembly_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) atomic_dec(&info->receive_credits);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) info->receive_credit_target =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) le16_to_cpu(data_transfer->credits_requested);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) if (le16_to_cpu(data_transfer->credits_granted)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) atomic_add(le16_to_cpu(data_transfer->credits_granted),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) &info->send_credits);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) * We have new send credits granted from remote peer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) * If any sender is waiting for credits, unblock it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) wake_up_interruptible(&info->wait_send_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) log_incoming(INFO, "data flags %d data_offset %d data_length %d remaining_data_length %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) le16_to_cpu(data_transfer->flags),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) le32_to_cpu(data_transfer->data_offset),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) le32_to_cpu(data_transfer->data_length),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) le32_to_cpu(data_transfer->remaining_data_length));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) /* Send a KEEP_ALIVE response right away if requested */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) info->keep_alive_requested = KEEP_ALIVE_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) if (le16_to_cpu(data_transfer->flags) &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) SMB_DIRECT_RESPONSE_REQUESTED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) info->keep_alive_requested = KEEP_ALIVE_PENDING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) log_rdma_recv(ERR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) "unexpected response type=%d\n", response->type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) put_receive_buffer(info, response);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) static struct rdma_cm_id *smbd_create_id(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) struct smbd_connection *info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) struct sockaddr *dstaddr, int port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) struct rdma_cm_id *id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) __be16 *sport;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) id = rdma_create_id(&init_net, smbd_conn_upcall, info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) RDMA_PS_TCP, IB_QPT_RC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) if (IS_ERR(id)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) rc = PTR_ERR(id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) log_rdma_event(ERR, "rdma_create_id() failed %i\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) return id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) if (dstaddr->sa_family == AF_INET6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) sport = &((struct sockaddr_in6 *)dstaddr)->sin6_port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) sport = &((struct sockaddr_in *)dstaddr)->sin_port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) *sport = htons(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) init_completion(&info->ri_done);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) info->ri_rc = -ETIMEDOUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) rc = rdma_resolve_addr(id, NULL, (struct sockaddr *)dstaddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) RDMA_RESOLVE_TIMEOUT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) log_rdma_event(ERR, "rdma_resolve_addr() failed %i\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) wait_for_completion_interruptible_timeout(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) &info->ri_done, msecs_to_jiffies(RDMA_RESOLVE_TIMEOUT));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) rc = info->ri_rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) log_rdma_event(ERR, "rdma_resolve_addr() completed %i\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) info->ri_rc = -ETIMEDOUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) rc = rdma_resolve_route(id, RDMA_RESOLVE_TIMEOUT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) log_rdma_event(ERR, "rdma_resolve_route() failed %i\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) wait_for_completion_interruptible_timeout(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) &info->ri_done, msecs_to_jiffies(RDMA_RESOLVE_TIMEOUT));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) rc = info->ri_rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) log_rdma_event(ERR, "rdma_resolve_route() completed %i\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) return id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) rdma_destroy_id(id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) return ERR_PTR(rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) * Test if FRWR (Fast Registration Work Requests) is supported on the device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) * This implementation requries FRWR on RDMA read/write
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) * return value: true if it is supported
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) static bool frwr_is_supported(struct ib_device_attr *attrs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) if (!(attrs->device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) if (attrs->max_fast_reg_page_list_len == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) static int smbd_ia_open(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) struct smbd_connection *info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) struct sockaddr *dstaddr, int port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) info->id = smbd_create_id(info, dstaddr, port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) if (IS_ERR(info->id)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) rc = PTR_ERR(info->id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) goto out1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) if (!frwr_is_supported(&info->id->device->attrs)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) log_rdma_event(ERR, "Fast Registration Work Requests (FRWR) is not supported\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) log_rdma_event(ERR, "Device capability flags = %llx max_fast_reg_page_list_len = %u\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) info->id->device->attrs.device_cap_flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) info->id->device->attrs.max_fast_reg_page_list_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) rc = -EPROTONOSUPPORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) goto out2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) info->max_frmr_depth = min_t(int,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) smbd_max_frmr_depth,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) info->id->device->attrs.max_fast_reg_page_list_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) info->mr_type = IB_MR_TYPE_MEM_REG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) if (info->id->device->attrs.device_cap_flags & IB_DEVICE_SG_GAPS_REG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) info->mr_type = IB_MR_TYPE_SG_GAPS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) info->pd = ib_alloc_pd(info->id->device, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) if (IS_ERR(info->pd)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) rc = PTR_ERR(info->pd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) log_rdma_event(ERR, "ib_alloc_pd() returned %d\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) goto out2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) out2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) rdma_destroy_id(info->id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) info->id = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) out1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) * Send a negotiation request message to the peer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) * The negotiation procedure is in [MS-SMBD] 3.1.5.2 and 3.1.5.3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) * After negotiation, the transport is connected and ready for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) * carrying upper layer SMB payload
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) static int smbd_post_send_negotiate_req(struct smbd_connection *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) struct ib_send_wr send_wr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) int rc = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) struct smbd_request *request;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) struct smbd_negotiate_req *packet;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) request = mempool_alloc(info->request_mempool, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) if (!request)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) request->info = info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) packet = smbd_request_payload(request);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) packet->min_version = cpu_to_le16(SMBD_V1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) packet->max_version = cpu_to_le16(SMBD_V1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) packet->reserved = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) packet->credits_requested = cpu_to_le16(info->send_credit_target);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) packet->preferred_send_size = cpu_to_le32(info->max_send_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) packet->max_receive_size = cpu_to_le32(info->max_receive_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) packet->max_fragmented_size =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) cpu_to_le32(info->max_fragmented_recv_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) request->num_sge = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) request->sge[0].addr = ib_dma_map_single(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) info->id->device, (void *)packet,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) sizeof(*packet), DMA_TO_DEVICE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) if (ib_dma_mapping_error(info->id->device, request->sge[0].addr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) rc = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) goto dma_mapping_failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) request->sge[0].length = sizeof(*packet);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) request->sge[0].lkey = info->pd->local_dma_lkey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) ib_dma_sync_single_for_device(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) info->id->device, request->sge[0].addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) request->sge[0].length, DMA_TO_DEVICE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) request->cqe.done = send_done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) send_wr.next = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) send_wr.wr_cqe = &request->cqe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) send_wr.sg_list = request->sge;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) send_wr.num_sge = request->num_sge;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) send_wr.opcode = IB_WR_SEND;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) send_wr.send_flags = IB_SEND_SIGNALED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) log_rdma_send(INFO, "sge addr=%llx length=%x lkey=%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) request->sge[0].addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) request->sge[0].length, request->sge[0].lkey);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) atomic_inc(&info->send_pending);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) rc = ib_post_send(info->id->qp, &send_wr, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) if (!rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) /* if we reach here, post send failed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) log_rdma_send(ERR, "ib_post_send failed rc=%d\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) atomic_dec(&info->send_pending);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) ib_dma_unmap_single(info->id->device, request->sge[0].addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) request->sge[0].length, DMA_TO_DEVICE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) smbd_disconnect_rdma_connection(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) dma_mapping_failed:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) mempool_free(request, info->request_mempool);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) * Extend the credits to remote peer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) * This implements [MS-SMBD] 3.1.5.9
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) * The idea is that we should extend credits to remote peer as quickly as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) * it's allowed, to maintain data flow. We allocate as much receive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) * buffer as possible, and extend the receive credits to remote peer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) * return value: the new credtis being granted.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) static int manage_credits_prior_sending(struct smbd_connection *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) int new_credits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) spin_lock(&info->lock_new_credits_offered);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) new_credits = info->new_credits_offered;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) info->new_credits_offered = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) spin_unlock(&info->lock_new_credits_offered);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) return new_credits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) * Check if we need to send a KEEP_ALIVE message
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) * The idle connection timer triggers a KEEP_ALIVE message when expires
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) * SMB_DIRECT_RESPONSE_REQUESTED is set in the message flag to have peer send
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) * back a response.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) * return value:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) * 1 if SMB_DIRECT_RESPONSE_REQUESTED needs to be set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) * 0: otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) static int manage_keep_alive_before_sending(struct smbd_connection *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) if (info->keep_alive_requested == KEEP_ALIVE_PENDING) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) info->keep_alive_requested = KEEP_ALIVE_SENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) /* Post the send request */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) static int smbd_post_send(struct smbd_connection *info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) struct smbd_request *request)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) struct ib_send_wr send_wr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) int rc, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) for (i = 0; i < request->num_sge; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) log_rdma_send(INFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) "rdma_request sge[%d] addr=%llu length=%u\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) i, request->sge[i].addr, request->sge[i].length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) ib_dma_sync_single_for_device(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) info->id->device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) request->sge[i].addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) request->sge[i].length,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) DMA_TO_DEVICE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) request->cqe.done = send_done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) send_wr.next = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) send_wr.wr_cqe = &request->cqe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) send_wr.sg_list = request->sge;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) send_wr.num_sge = request->num_sge;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) send_wr.opcode = IB_WR_SEND;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) send_wr.send_flags = IB_SEND_SIGNALED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) rc = ib_post_send(info->id->qp, &send_wr, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) log_rdma_send(ERR, "ib_post_send failed rc=%d\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) smbd_disconnect_rdma_connection(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) rc = -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) /* Reset timer for idle connection after packet is sent */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) mod_delayed_work(info->workqueue, &info->idle_timer_work,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) info->keep_alive_interval*HZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) static int smbd_post_send_sgl(struct smbd_connection *info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) struct scatterlist *sgl, int data_length, int remaining_data_length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) int num_sgs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) int i, rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) int header_length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) struct smbd_request *request;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) struct smbd_data_transfer *packet;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) int new_credits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) struct scatterlist *sg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) wait_credit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) /* Wait for send credits. A SMBD packet needs one credit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) rc = wait_event_interruptible(info->wait_send_queue,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) atomic_read(&info->send_credits) > 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) info->transport_status != SMBD_CONNECTED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) goto err_wait_credit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) if (info->transport_status != SMBD_CONNECTED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) log_outgoing(ERR, "disconnected not sending on wait_credit\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) rc = -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) goto err_wait_credit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) if (unlikely(atomic_dec_return(&info->send_credits) < 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) atomic_inc(&info->send_credits);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) goto wait_credit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) wait_send_queue:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) wait_event(info->wait_post_send,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) atomic_read(&info->send_pending) < info->send_credit_target ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) info->transport_status != SMBD_CONNECTED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) if (info->transport_status != SMBD_CONNECTED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) log_outgoing(ERR, "disconnected not sending on wait_send_queue\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) rc = -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) goto err_wait_send_queue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) if (unlikely(atomic_inc_return(&info->send_pending) >
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) info->send_credit_target)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) atomic_dec(&info->send_pending);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) goto wait_send_queue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) request = mempool_alloc(info->request_mempool, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) if (!request) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) rc = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) goto err_alloc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) request->info = info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) /* Fill in the packet header */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) packet = smbd_request_payload(request);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) packet->credits_requested = cpu_to_le16(info->send_credit_target);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) new_credits = manage_credits_prior_sending(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) atomic_add(new_credits, &info->receive_credits);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) packet->credits_granted = cpu_to_le16(new_credits);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) info->send_immediate = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) packet->flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) if (manage_keep_alive_before_sending(info))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) packet->flags |= cpu_to_le16(SMB_DIRECT_RESPONSE_REQUESTED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) packet->reserved = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) if (!data_length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) packet->data_offset = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) packet->data_offset = cpu_to_le32(24);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) packet->data_length = cpu_to_le32(data_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) packet->remaining_data_length = cpu_to_le32(remaining_data_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) packet->padding = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) log_outgoing(INFO, "credits_requested=%d credits_granted=%d data_offset=%d data_length=%d remaining_data_length=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) le16_to_cpu(packet->credits_requested),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) le16_to_cpu(packet->credits_granted),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) le32_to_cpu(packet->data_offset),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) le32_to_cpu(packet->data_length),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) le32_to_cpu(packet->remaining_data_length));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) /* Map the packet to DMA */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) header_length = sizeof(struct smbd_data_transfer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) /* If this is a packet without payload, don't send padding */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) if (!data_length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) header_length = offsetof(struct smbd_data_transfer, padding);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) request->num_sge = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) request->sge[0].addr = ib_dma_map_single(info->id->device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) (void *)packet,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) header_length,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) DMA_TO_DEVICE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) if (ib_dma_mapping_error(info->id->device, request->sge[0].addr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) rc = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) request->sge[0].addr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) goto err_dma;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) request->sge[0].length = header_length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) request->sge[0].lkey = info->pd->local_dma_lkey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) /* Fill in the packet data payload */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) num_sgs = sgl ? sg_nents(sgl) : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) for_each_sg(sgl, sg, num_sgs, i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) request->sge[i+1].addr =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) ib_dma_map_page(info->id->device, sg_page(sg),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) sg->offset, sg->length, DMA_TO_DEVICE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) if (ib_dma_mapping_error(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) info->id->device, request->sge[i+1].addr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) rc = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) request->sge[i+1].addr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) goto err_dma;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) request->sge[i+1].length = sg->length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) request->sge[i+1].lkey = info->pd->local_dma_lkey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) request->num_sge++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) rc = smbd_post_send(info, request);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) if (!rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) err_dma:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) for (i = 0; i < request->num_sge; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) if (request->sge[i].addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) ib_dma_unmap_single(info->id->device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) request->sge[i].addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) request->sge[i].length,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) DMA_TO_DEVICE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) mempool_free(request, info->request_mempool);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) /* roll back receive credits and credits to be offered */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) spin_lock(&info->lock_new_credits_offered);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) info->new_credits_offered += new_credits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) spin_unlock(&info->lock_new_credits_offered);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) atomic_sub(new_credits, &info->receive_credits);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) err_alloc:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) if (atomic_dec_and_test(&info->send_pending))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) wake_up(&info->wait_send_pending);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) err_wait_send_queue:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) /* roll back send credits and pending */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) atomic_inc(&info->send_credits);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) err_wait_credit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) * Send a page
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) * page: the page to send
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) * offset: offset in the page to send
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) * size: length in the page to send
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) * remaining_data_length: remaining data to send in this payload
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) static int smbd_post_send_page(struct smbd_connection *info, struct page *page,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) unsigned long offset, size_t size, int remaining_data_length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) struct scatterlist sgl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) sg_init_table(&sgl, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) sg_set_page(&sgl, page, size, offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) return smbd_post_send_sgl(info, &sgl, size, remaining_data_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) * Send an empty message
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) * Empty message is used to extend credits to peer to for keep live
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) * while there is no upper layer payload to send at the time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) static int smbd_post_send_empty(struct smbd_connection *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) info->count_send_empty++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) return smbd_post_send_sgl(info, NULL, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) * Send a data buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) * iov: the iov array describing the data buffers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) * n_vec: number of iov array
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) * remaining_data_length: remaining data to send following this packet
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) * in segmented SMBD packet
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) static int smbd_post_send_data(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) struct smbd_connection *info, struct kvec *iov, int n_vec,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) int remaining_data_length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) u32 data_length = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) struct scatterlist sgl[SMBDIRECT_MAX_SGE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) if (n_vec > SMBDIRECT_MAX_SGE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) cifs_dbg(VFS, "Can't fit data to SGL, n_vec=%d\n", n_vec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) sg_init_table(sgl, n_vec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) for (i = 0; i < n_vec; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) data_length += iov[i].iov_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) sg_set_buf(&sgl[i], iov[i].iov_base, iov[i].iov_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) return smbd_post_send_sgl(info, sgl, data_length, remaining_data_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) * Post a receive request to the transport
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) * The remote peer can only send data when a receive request is posted
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) * The interaction is controlled by send/receive credit system
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) static int smbd_post_recv(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) struct smbd_connection *info, struct smbd_response *response)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) struct ib_recv_wr recv_wr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) int rc = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036) response->sge.addr = ib_dma_map_single(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) info->id->device, response->packet,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) info->max_receive_size, DMA_FROM_DEVICE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) if (ib_dma_mapping_error(info->id->device, response->sge.addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) response->sge.length = info->max_receive_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) response->sge.lkey = info->pd->local_dma_lkey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) response->cqe.done = recv_done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) recv_wr.wr_cqe = &response->cqe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) recv_wr.next = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) recv_wr.sg_list = &response->sge;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) recv_wr.num_sge = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) rc = ib_post_recv(info->id->qp, &recv_wr, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) ib_dma_unmap_single(info->id->device, response->sge.addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) response->sge.length, DMA_FROM_DEVICE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) smbd_disconnect_rdma_connection(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) log_rdma_recv(ERR, "ib_post_recv failed rc=%d\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) /* Perform SMBD negotiate according to [MS-SMBD] 3.1.5.2 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) static int smbd_negotiate(struct smbd_connection *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) struct smbd_response *response = get_receive_buffer(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) response->type = SMBD_NEGOTIATE_RESP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) rc = smbd_post_recv(info, response);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) log_rdma_event(INFO, "smbd_post_recv rc=%d iov.addr=%llx iov.length=%x iov.lkey=%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) rc, response->sge.addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) response->sge.length, response->sge.lkey);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) init_completion(&info->negotiate_completion);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) info->negotiate_done = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) rc = smbd_post_send_negotiate_req(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) rc = wait_for_completion_interruptible_timeout(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) &info->negotiate_completion, SMBD_NEGOTIATE_TIMEOUT * HZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) log_rdma_event(INFO, "wait_for_completion_timeout rc=%d\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) if (info->negotiate_done)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) if (rc == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) rc = -ETIMEDOUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) else if (rc == -ERESTARTSYS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) rc = -EINTR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) rc = -ENOTCONN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) static void put_empty_packet(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) struct smbd_connection *info, struct smbd_response *response)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) spin_lock(&info->empty_packet_queue_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) list_add_tail(&response->list, &info->empty_packet_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) info->count_empty_packet_queue++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) spin_unlock(&info->empty_packet_queue_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) queue_work(info->workqueue, &info->post_send_credits_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) * Implement Connection.FragmentReassemblyBuffer defined in [MS-SMBD] 3.1.1.1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) * This is a queue for reassembling upper layer payload and present to upper
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) * layer. All the inncoming payload go to the reassembly queue, regardless of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) * if reassembly is required. The uuper layer code reads from the queue for all
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) * incoming payloads.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) * Put a received packet to the reassembly queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) * response: the packet received
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) * data_length: the size of payload in this packet
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) static void enqueue_reassembly(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) struct smbd_connection *info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) struct smbd_response *response,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) int data_length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) spin_lock(&info->reassembly_queue_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) list_add_tail(&response->list, &info->reassembly_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) info->reassembly_queue_length++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) * Make sure reassembly_data_length is updated after list and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) * reassembly_queue_length are updated. On the dequeue side
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) * reassembly_data_length is checked without a lock to determine
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) * if reassembly_queue_length and list is up to date
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) virt_wmb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136) info->reassembly_data_length += data_length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) spin_unlock(&info->reassembly_queue_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) info->count_reassembly_queue++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) info->count_enqueue_reassembly_queue++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) * Get the first entry at the front of reassembly queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) * Caller is responsible for locking
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145) * return value: the first entry if any, NULL if queue is empty
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) static struct smbd_response *_get_first_reassembly(struct smbd_connection *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149) struct smbd_response *ret = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151) if (!list_empty(&info->reassembly_queue)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) ret = list_first_entry(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) &info->reassembly_queue,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) struct smbd_response, list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159) static struct smbd_response *get_empty_queue_buffer(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) struct smbd_connection *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) struct smbd_response *ret = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) spin_lock_irqsave(&info->empty_packet_queue_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) if (!list_empty(&info->empty_packet_queue)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) ret = list_first_entry(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168) &info->empty_packet_queue,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) struct smbd_response, list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) list_del(&ret->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171) info->count_empty_packet_queue--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173) spin_unlock_irqrestore(&info->empty_packet_queue_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179) * Get a receive buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) * For each remote send, we need to post a receive. The receive buffers are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181) * pre-allocated in advance.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182) * return value: the receive buffer, NULL if none is available
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) static struct smbd_response *get_receive_buffer(struct smbd_connection *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186) struct smbd_response *ret = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) spin_lock_irqsave(&info->receive_queue_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) if (!list_empty(&info->receive_queue)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191) ret = list_first_entry(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192) &info->receive_queue,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193) struct smbd_response, list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) list_del(&ret->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195) info->count_receive_queue--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196) info->count_get_receive_buffer++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198) spin_unlock_irqrestore(&info->receive_queue_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204) * Return a receive buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205) * Upon returning of a receive buffer, we can post new receive and extend
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) * more receive credits to remote peer. This is done immediately after a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207) * receive buffer is returned.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209) static void put_receive_buffer(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210) struct smbd_connection *info, struct smbd_response *response)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214) ib_dma_unmap_single(info->id->device, response->sge.addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1215) response->sge.length, DMA_FROM_DEVICE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217) spin_lock_irqsave(&info->receive_queue_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218) list_add_tail(&response->list, &info->receive_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219) info->count_receive_queue++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220) info->count_put_receive_buffer++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221) spin_unlock_irqrestore(&info->receive_queue_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223) queue_work(info->workqueue, &info->post_send_credits_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226) /* Preallocate all receive buffer on transport establishment */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227) static int allocate_receive_buffers(struct smbd_connection *info, int num_buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230) struct smbd_response *response;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232) INIT_LIST_HEAD(&info->reassembly_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233) spin_lock_init(&info->reassembly_queue_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234) info->reassembly_data_length = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235) info->reassembly_queue_length = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237) INIT_LIST_HEAD(&info->receive_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238) spin_lock_init(&info->receive_queue_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239) info->count_receive_queue = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) INIT_LIST_HEAD(&info->empty_packet_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242) spin_lock_init(&info->empty_packet_queue_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243) info->count_empty_packet_queue = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245) init_waitqueue_head(&info->wait_receive_queues);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247) for (i = 0; i < num_buf; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248) response = mempool_alloc(info->response_mempool, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249) if (!response)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250) goto allocate_failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252) response->info = info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253) list_add_tail(&response->list, &info->receive_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254) info->count_receive_queue++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259) allocate_failed:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260) while (!list_empty(&info->receive_queue)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261) response = list_first_entry(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262) &info->receive_queue,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263) struct smbd_response, list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264) list_del(&response->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265) info->count_receive_queue--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1267) mempool_free(response, info->response_mempool);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1268) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1269) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1270) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1272) static void destroy_receive_buffers(struct smbd_connection *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1273) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1274) struct smbd_response *response;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1276) while ((response = get_receive_buffer(info)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1277) mempool_free(response, info->response_mempool);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1279) while ((response = get_empty_queue_buffer(info)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1280) mempool_free(response, info->response_mempool);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1281) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1283) /* Implement idle connection timer [MS-SMBD] 3.1.6.2 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1284) static void idle_connection_timer(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1285) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1286) struct smbd_connection *info = container_of(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1287) work, struct smbd_connection,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1288) idle_timer_work.work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1290) if (info->keep_alive_requested != KEEP_ALIVE_NONE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1291) log_keep_alive(ERR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1292) "error status info->keep_alive_requested=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1293) info->keep_alive_requested);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1294) smbd_disconnect_rdma_connection(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1295) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1296) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1298) log_keep_alive(INFO, "about to send an empty idle message\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1299) smbd_post_send_empty(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1300)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1301) /* Setup the next idle timeout work */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1302) queue_delayed_work(info->workqueue, &info->idle_timer_work,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1303) info->keep_alive_interval*HZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1304) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1306) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1307) * Destroy the transport and related RDMA and memory resources
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1308) * Need to go through all the pending counters and make sure on one is using
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1309) * the transport while it is destroyed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1310) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1311) void smbd_destroy(struct TCP_Server_Info *server)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1312) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1313) struct smbd_connection *info = server->smbd_conn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1314) struct smbd_response *response;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1315) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1317) if (!info) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1318) log_rdma_event(INFO, "rdma session already destroyed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1319) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1322) log_rdma_event(INFO, "destroying rdma session\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1323) if (info->transport_status != SMBD_DISCONNECTED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1324) rdma_disconnect(server->smbd_conn->id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1325) log_rdma_event(INFO, "wait for transport being disconnected\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1326) wait_event_interruptible(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1327) info->disconn_wait,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1328) info->transport_status == SMBD_DISCONNECTED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1329) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1331) log_rdma_event(INFO, "destroying qp\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1332) ib_drain_qp(info->id->qp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1333) rdma_destroy_qp(info->id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1335) log_rdma_event(INFO, "cancelling idle timer\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1336) cancel_delayed_work_sync(&info->idle_timer_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1338) log_rdma_event(INFO, "wait for all send posted to IB to finish\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1339) wait_event(info->wait_send_pending,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1340) atomic_read(&info->send_pending) == 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1341)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1342) /* It's not posssible for upper layer to get to reassembly */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1343) log_rdma_event(INFO, "drain the reassembly queue\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1344) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1345) spin_lock_irqsave(&info->reassembly_queue_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1346) response = _get_first_reassembly(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1347) if (response) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1348) list_del(&response->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1349) spin_unlock_irqrestore(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1350) &info->reassembly_queue_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1351) put_receive_buffer(info, response);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1352) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1353) spin_unlock_irqrestore(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1354) &info->reassembly_queue_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1355) } while (response);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1356) info->reassembly_data_length = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1358) log_rdma_event(INFO, "free receive buffers\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1359) wait_event(info->wait_receive_queues,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1360) info->count_receive_queue + info->count_empty_packet_queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1361) == info->receive_credit_max);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1362) destroy_receive_buffers(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1363)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1364) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1365) * For performance reasons, memory registration and deregistration
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1366) * are not locked by srv_mutex. It is possible some processes are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1367) * blocked on transport srv_mutex while holding memory registration.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1368) * Release the transport srv_mutex to allow them to hit the failure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1369) * path when sending data, and then release memory registartions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1370) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1371) log_rdma_event(INFO, "freeing mr list\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1372) wake_up_interruptible_all(&info->wait_mr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1373) while (atomic_read(&info->mr_used_count)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1374) mutex_unlock(&server->srv_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1375) msleep(1000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1376) mutex_lock(&server->srv_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1377) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1378) destroy_mr_list(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1380) ib_free_cq(info->send_cq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1381) ib_free_cq(info->recv_cq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1382) ib_dealloc_pd(info->pd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1383) rdma_destroy_id(info->id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1385) /* free mempools */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1386) mempool_destroy(info->request_mempool);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1387) kmem_cache_destroy(info->request_cache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1388)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1389) mempool_destroy(info->response_mempool);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1390) kmem_cache_destroy(info->response_cache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1392) info->transport_status = SMBD_DESTROYED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1394) destroy_workqueue(info->workqueue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1395) log_rdma_event(INFO, "rdma session destroyed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1396) kfree(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1397) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1398)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1399) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1400) * Reconnect this SMBD connection, called from upper layer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1401) * return value: 0 on success, or actual error code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1402) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1403) int smbd_reconnect(struct TCP_Server_Info *server)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1404) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1405) log_rdma_event(INFO, "reconnecting rdma session\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1406)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1407) if (!server->smbd_conn) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1408) log_rdma_event(INFO, "rdma session already destroyed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1409) goto create_conn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1410) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1412) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1413) * This is possible if transport is disconnected and we haven't received
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1414) * notification from RDMA, but upper layer has detected timeout
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1415) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1416) if (server->smbd_conn->transport_status == SMBD_CONNECTED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1417) log_rdma_event(INFO, "disconnecting transport\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1418) smbd_destroy(server);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1419) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1420)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1421) create_conn:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1422) log_rdma_event(INFO, "creating rdma session\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1423) server->smbd_conn = smbd_get_connection(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1424) server, (struct sockaddr *) &server->dstaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1425)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1426) if (server->smbd_conn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1427) cifs_dbg(VFS, "RDMA transport re-established\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1428)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1429) return server->smbd_conn ? 0 : -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1430) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1431)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1432) static void destroy_caches_and_workqueue(struct smbd_connection *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1433) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1434) destroy_receive_buffers(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1435) destroy_workqueue(info->workqueue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1436) mempool_destroy(info->response_mempool);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1437) kmem_cache_destroy(info->response_cache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1438) mempool_destroy(info->request_mempool);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1439) kmem_cache_destroy(info->request_cache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1440) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1441)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1442) #define MAX_NAME_LEN 80
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1443) static int allocate_caches_and_workqueue(struct smbd_connection *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1444) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1445) char name[MAX_NAME_LEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1446) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1447)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1448) scnprintf(name, MAX_NAME_LEN, "smbd_request_%p", info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1449) info->request_cache =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1450) kmem_cache_create(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1451) name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1452) sizeof(struct smbd_request) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1453) sizeof(struct smbd_data_transfer),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1454) 0, SLAB_HWCACHE_ALIGN, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1455) if (!info->request_cache)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1456) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1457)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1458) info->request_mempool =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1459) mempool_create(info->send_credit_target, mempool_alloc_slab,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1460) mempool_free_slab, info->request_cache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1461) if (!info->request_mempool)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1462) goto out1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1463)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1464) scnprintf(name, MAX_NAME_LEN, "smbd_response_%p", info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1465) info->response_cache =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1466) kmem_cache_create(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1467) name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1468) sizeof(struct smbd_response) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1469) info->max_receive_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1470) 0, SLAB_HWCACHE_ALIGN, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1471) if (!info->response_cache)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1472) goto out2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1474) info->response_mempool =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1475) mempool_create(info->receive_credit_max, mempool_alloc_slab,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1476) mempool_free_slab, info->response_cache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1477) if (!info->response_mempool)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1478) goto out3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1479)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1480) scnprintf(name, MAX_NAME_LEN, "smbd_%p", info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1481) info->workqueue = create_workqueue(name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1482) if (!info->workqueue)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1483) goto out4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1484)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1485) rc = allocate_receive_buffers(info, info->receive_credit_max);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1486) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1487) log_rdma_event(ERR, "failed to allocate receive buffers\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1488) goto out5;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1489) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1491) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1492)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1493) out5:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1494) destroy_workqueue(info->workqueue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1495) out4:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1496) mempool_destroy(info->response_mempool);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1497) out3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1498) kmem_cache_destroy(info->response_cache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1499) out2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1500) mempool_destroy(info->request_mempool);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1501) out1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1502) kmem_cache_destroy(info->request_cache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1503) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1504) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1505)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1506) /* Create a SMBD connection, called by upper layer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1507) static struct smbd_connection *_smbd_get_connection(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1508) struct TCP_Server_Info *server, struct sockaddr *dstaddr, int port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1509) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1510) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1511) struct smbd_connection *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1512) struct rdma_conn_param conn_param;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1513) struct ib_qp_init_attr qp_attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1514) struct sockaddr_in *addr_in = (struct sockaddr_in *) dstaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1515) struct ib_port_immutable port_immutable;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1516) u32 ird_ord_hdr[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1517)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1518) info = kzalloc(sizeof(struct smbd_connection), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1519) if (!info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1520) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1521)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1522) info->transport_status = SMBD_CONNECTING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1523) rc = smbd_ia_open(info, dstaddr, port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1524) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1525) log_rdma_event(INFO, "smbd_ia_open rc=%d\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1526) goto create_id_failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1527) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1528)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1529) if (smbd_send_credit_target > info->id->device->attrs.max_cqe ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1530) smbd_send_credit_target > info->id->device->attrs.max_qp_wr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1531) log_rdma_event(ERR, "consider lowering send_credit_target = %d. Possible CQE overrun, device reporting max_cpe %d max_qp_wr %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1532) smbd_send_credit_target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1533) info->id->device->attrs.max_cqe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1534) info->id->device->attrs.max_qp_wr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1535) goto config_failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1536) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1537)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1538) if (smbd_receive_credit_max > info->id->device->attrs.max_cqe ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1539) smbd_receive_credit_max > info->id->device->attrs.max_qp_wr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1540) log_rdma_event(ERR, "consider lowering receive_credit_max = %d. Possible CQE overrun, device reporting max_cpe %d max_qp_wr %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1541) smbd_receive_credit_max,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1542) info->id->device->attrs.max_cqe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1543) info->id->device->attrs.max_qp_wr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1544) goto config_failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1545) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1546)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1547) info->receive_credit_max = smbd_receive_credit_max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1548) info->send_credit_target = smbd_send_credit_target;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1549) info->max_send_size = smbd_max_send_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1550) info->max_fragmented_recv_size = smbd_max_fragmented_recv_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1551) info->max_receive_size = smbd_max_receive_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1552) info->keep_alive_interval = smbd_keep_alive_interval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1553)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1554) if (info->id->device->attrs.max_send_sge < SMBDIRECT_MAX_SGE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1555) log_rdma_event(ERR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1556) "warning: device max_send_sge = %d too small\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1557) info->id->device->attrs.max_send_sge);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1558) log_rdma_event(ERR, "Queue Pair creation may fail\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1559) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1560) if (info->id->device->attrs.max_recv_sge < SMBDIRECT_MAX_SGE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1561) log_rdma_event(ERR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1562) "warning: device max_recv_sge = %d too small\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1563) info->id->device->attrs.max_recv_sge);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1564) log_rdma_event(ERR, "Queue Pair creation may fail\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1565) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1566)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1567) info->send_cq = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1568) info->recv_cq = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1569) info->send_cq =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1570) ib_alloc_cq_any(info->id->device, info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1571) info->send_credit_target, IB_POLL_SOFTIRQ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1572) if (IS_ERR(info->send_cq)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1573) info->send_cq = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1574) goto alloc_cq_failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1575) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1576)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1577) info->recv_cq =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1578) ib_alloc_cq_any(info->id->device, info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1579) info->receive_credit_max, IB_POLL_SOFTIRQ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1580) if (IS_ERR(info->recv_cq)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1581) info->recv_cq = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1582) goto alloc_cq_failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1583) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1584)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1585) memset(&qp_attr, 0, sizeof(qp_attr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1586) qp_attr.event_handler = smbd_qp_async_error_upcall;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1587) qp_attr.qp_context = info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1588) qp_attr.cap.max_send_wr = info->send_credit_target;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1589) qp_attr.cap.max_recv_wr = info->receive_credit_max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1590) qp_attr.cap.max_send_sge = SMBDIRECT_MAX_SGE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1591) qp_attr.cap.max_recv_sge = SMBDIRECT_MAX_SGE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1592) qp_attr.cap.max_inline_data = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1593) qp_attr.sq_sig_type = IB_SIGNAL_REQ_WR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1594) qp_attr.qp_type = IB_QPT_RC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1595) qp_attr.send_cq = info->send_cq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1596) qp_attr.recv_cq = info->recv_cq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1597) qp_attr.port_num = ~0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1598)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1599) rc = rdma_create_qp(info->id, info->pd, &qp_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1600) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1601) log_rdma_event(ERR, "rdma_create_qp failed %i\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1602) goto create_qp_failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1603) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1604)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1605) memset(&conn_param, 0, sizeof(conn_param));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1606) conn_param.initiator_depth = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1607)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1608) conn_param.responder_resources =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1609) info->id->device->attrs.max_qp_rd_atom
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1610) < SMBD_CM_RESPONDER_RESOURCES ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1611) info->id->device->attrs.max_qp_rd_atom :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1612) SMBD_CM_RESPONDER_RESOURCES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1613) info->responder_resources = conn_param.responder_resources;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1614) log_rdma_mr(INFO, "responder_resources=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1615) info->responder_resources);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1616)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1617) /* Need to send IRD/ORD in private data for iWARP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1618) info->id->device->ops.get_port_immutable(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1619) info->id->device, info->id->port_num, &port_immutable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1620) if (port_immutable.core_cap_flags & RDMA_CORE_PORT_IWARP) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1621) ird_ord_hdr[0] = info->responder_resources;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1622) ird_ord_hdr[1] = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1623) conn_param.private_data = ird_ord_hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1624) conn_param.private_data_len = sizeof(ird_ord_hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1625) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1626) conn_param.private_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1627) conn_param.private_data_len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1628) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1629)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1630) conn_param.retry_count = SMBD_CM_RETRY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1631) conn_param.rnr_retry_count = SMBD_CM_RNR_RETRY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1632) conn_param.flow_control = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1633)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1634) log_rdma_event(INFO, "connecting to IP %pI4 port %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1635) &addr_in->sin_addr, port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1636)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1637) init_waitqueue_head(&info->conn_wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1638) init_waitqueue_head(&info->disconn_wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1639) init_waitqueue_head(&info->wait_reassembly_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1640) rc = rdma_connect(info->id, &conn_param);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1641) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1642) log_rdma_event(ERR, "rdma_connect() failed with %i\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1643) goto rdma_connect_failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1644) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1645)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1646) wait_event_interruptible(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1647) info->conn_wait, info->transport_status != SMBD_CONNECTING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1648)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1649) if (info->transport_status != SMBD_CONNECTED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1650) log_rdma_event(ERR, "rdma_connect failed port=%d\n", port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1651) goto rdma_connect_failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1652) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1653)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1654) log_rdma_event(INFO, "rdma_connect connected\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1655)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1656) rc = allocate_caches_and_workqueue(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1657) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1658) log_rdma_event(ERR, "cache allocation failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1659) goto allocate_cache_failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1660) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1661)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1662) init_waitqueue_head(&info->wait_send_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1663) INIT_DELAYED_WORK(&info->idle_timer_work, idle_connection_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1664) queue_delayed_work(info->workqueue, &info->idle_timer_work,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1665) info->keep_alive_interval*HZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1666)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1667) init_waitqueue_head(&info->wait_send_pending);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1668) atomic_set(&info->send_pending, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1669)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1670) init_waitqueue_head(&info->wait_post_send);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1671)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1672) INIT_WORK(&info->disconnect_work, smbd_disconnect_rdma_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1673) INIT_WORK(&info->post_send_credits_work, smbd_post_send_credits);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1674) info->new_credits_offered = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1675) spin_lock_init(&info->lock_new_credits_offered);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1676)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1677) rc = smbd_negotiate(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1678) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1679) log_rdma_event(ERR, "smbd_negotiate rc=%d\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1680) goto negotiation_failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1681) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1682)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1683) rc = allocate_mr_list(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1684) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1685) log_rdma_mr(ERR, "memory registration allocation failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1686) goto allocate_mr_failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1687) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1688)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1689) return info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1690)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1691) allocate_mr_failed:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1692) /* At this point, need to a full transport shutdown */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1693) smbd_destroy(server);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1694) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1695)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1696) negotiation_failed:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1697) cancel_delayed_work_sync(&info->idle_timer_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1698) destroy_caches_and_workqueue(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1699) info->transport_status = SMBD_NEGOTIATE_FAILED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1700) init_waitqueue_head(&info->conn_wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1701) rdma_disconnect(info->id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1702) wait_event(info->conn_wait,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1703) info->transport_status == SMBD_DISCONNECTED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1704)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1705) allocate_cache_failed:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1706) rdma_connect_failed:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1707) rdma_destroy_qp(info->id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1708)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1709) create_qp_failed:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1710) alloc_cq_failed:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1711) if (info->send_cq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1712) ib_free_cq(info->send_cq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1713) if (info->recv_cq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1714) ib_free_cq(info->recv_cq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1715)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1716) config_failed:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1717) ib_dealloc_pd(info->pd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1718) rdma_destroy_id(info->id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1719)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1720) create_id_failed:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1721) kfree(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1722) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1723) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1724)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1725) struct smbd_connection *smbd_get_connection(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1726) struct TCP_Server_Info *server, struct sockaddr *dstaddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1727) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1728) struct smbd_connection *ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1729) int port = SMBD_PORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1730)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1731) try_again:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1732) ret = _smbd_get_connection(server, dstaddr, port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1733)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1734) /* Try SMB_PORT if SMBD_PORT doesn't work */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1735) if (!ret && port == SMBD_PORT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1736) port = SMB_PORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1737) goto try_again;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1738) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1739) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1740) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1741)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1742) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1743) * Receive data from receive reassembly queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1744) * All the incoming data packets are placed in reassembly queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1745) * buf: the buffer to read data into
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1746) * size: the length of data to read
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1747) * return value: actual data read
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1748) * Note: this implementation copies the data from reassebmly queue to receive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1749) * buffers used by upper layer. This is not the optimal code path. A better way
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1750) * to do it is to not have upper layer allocate its receive buffers but rather
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1751) * borrow the buffer from reassembly queue, and return it after data is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1752) * consumed. But this will require more changes to upper layer code, and also
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1753) * need to consider packet boundaries while they still being reassembled.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1754) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1755) static int smbd_recv_buf(struct smbd_connection *info, char *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1756) unsigned int size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1757) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1758) struct smbd_response *response;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1759) struct smbd_data_transfer *data_transfer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1760) int to_copy, to_read, data_read, offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1761) u32 data_length, remaining_data_length, data_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1762) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1763)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1764) again:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1765) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1766) * No need to hold the reassembly queue lock all the time as we are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1767) * the only one reading from the front of the queue. The transport
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1768) * may add more entries to the back of the queue at the same time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1769) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1770) log_read(INFO, "size=%d info->reassembly_data_length=%d\n", size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1771) info->reassembly_data_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1772) if (info->reassembly_data_length >= size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1773) int queue_length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1774) int queue_removed = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1775)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1776) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1777) * Need to make sure reassembly_data_length is read before
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1778) * reading reassembly_queue_length and calling
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1779) * _get_first_reassembly. This call is lock free
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1780) * as we never read at the end of the queue which are being
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1781) * updated in SOFTIRQ as more data is received
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1782) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1783) virt_rmb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1784) queue_length = info->reassembly_queue_length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1785) data_read = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1786) to_read = size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1787) offset = info->first_entry_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1788) while (data_read < size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1789) response = _get_first_reassembly(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1790) data_transfer = smbd_response_payload(response);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1791) data_length = le32_to_cpu(data_transfer->data_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1792) remaining_data_length =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1793) le32_to_cpu(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1794) data_transfer->remaining_data_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1795) data_offset = le32_to_cpu(data_transfer->data_offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1796)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1797) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1798) * The upper layer expects RFC1002 length at the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1799) * beginning of the payload. Return it to indicate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1800) * the total length of the packet. This minimize the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1801) * change to upper layer packet processing logic. This
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1802) * will be eventually remove when an intermediate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1803) * transport layer is added
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1804) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1805) if (response->first_segment && size == 4) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1806) unsigned int rfc1002_len =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1807) data_length + remaining_data_length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1808) *((__be32 *)buf) = cpu_to_be32(rfc1002_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1809) data_read = 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1810) response->first_segment = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1811) log_read(INFO, "returning rfc1002 length %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1812) rfc1002_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1813) goto read_rfc1002_done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1814) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1815)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1816) to_copy = min_t(int, data_length - offset, to_read);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1817) memcpy(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1818) buf + data_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1819) (char *)data_transfer + data_offset + offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1820) to_copy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1821)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1822) /* move on to the next buffer? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1823) if (to_copy == data_length - offset) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1824) queue_length--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1825) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1826) * No need to lock if we are not at the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1827) * end of the queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1828) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1829) if (queue_length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1830) list_del(&response->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1831) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1832) spin_lock_irq(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1833) &info->reassembly_queue_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1834) list_del(&response->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1835) spin_unlock_irq(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1836) &info->reassembly_queue_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1837) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1838) queue_removed++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1839) info->count_reassembly_queue--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1840) info->count_dequeue_reassembly_queue++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1841) put_receive_buffer(info, response);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1842) offset = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1843) log_read(INFO, "put_receive_buffer offset=0\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1844) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1845) offset += to_copy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1846)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1847) to_read -= to_copy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1848) data_read += to_copy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1849)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1850) log_read(INFO, "_get_first_reassembly memcpy %d bytes data_transfer_length-offset=%d after that to_read=%d data_read=%d offset=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1851) to_copy, data_length - offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1852) to_read, data_read, offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1853) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1854)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1855) spin_lock_irq(&info->reassembly_queue_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1856) info->reassembly_data_length -= data_read;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1857) info->reassembly_queue_length -= queue_removed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1858) spin_unlock_irq(&info->reassembly_queue_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1859)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1860) info->first_entry_offset = offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1861) log_read(INFO, "returning to thread data_read=%d reassembly_data_length=%d first_entry_offset=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1862) data_read, info->reassembly_data_length,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1863) info->first_entry_offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1864) read_rfc1002_done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1865) return data_read;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1866) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1867)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1868) log_read(INFO, "wait_event on more data\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1869) rc = wait_event_interruptible(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1870) info->wait_reassembly_queue,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1871) info->reassembly_data_length >= size ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1872) info->transport_status != SMBD_CONNECTED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1873) /* Don't return any data if interrupted */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1874) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1875) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1876)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1877) if (info->transport_status != SMBD_CONNECTED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1878) log_read(ERR, "disconnected\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1879) return -ECONNABORTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1880) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1881)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1882) goto again;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1883) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1884)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1885) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1886) * Receive a page from receive reassembly queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1887) * page: the page to read data into
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1888) * to_read: the length of data to read
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1889) * return value: actual data read
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1890) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1891) static int smbd_recv_page(struct smbd_connection *info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1892) struct page *page, unsigned int page_offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1893) unsigned int to_read)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1894) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1895) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1896) char *to_address;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1897) void *page_address;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1898)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1899) /* make sure we have the page ready for read */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1900) ret = wait_event_interruptible(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1901) info->wait_reassembly_queue,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1902) info->reassembly_data_length >= to_read ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1903) info->transport_status != SMBD_CONNECTED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1904) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1905) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1906)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1907) /* now we can read from reassembly queue and not sleep */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1908) page_address = kmap_atomic(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1909) to_address = (char *) page_address + page_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1910)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1911) log_read(INFO, "reading from page=%p address=%p to_read=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1912) page, to_address, to_read);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1913)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1914) ret = smbd_recv_buf(info, to_address, to_read);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1915) kunmap_atomic(page_address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1916)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1917) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1918) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1919)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1920) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1921) * Receive data from transport
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1922) * msg: a msghdr point to the buffer, can be ITER_KVEC or ITER_BVEC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1923) * return: total bytes read, or 0. SMB Direct will not do partial read.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1924) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1925) int smbd_recv(struct smbd_connection *info, struct msghdr *msg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1926) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1927) char *buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1928) struct page *page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1929) unsigned int to_read, page_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1930) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1931)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1932) if (iov_iter_rw(&msg->msg_iter) == WRITE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1933) /* It's a bug in upper layer to get there */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1934) cifs_dbg(VFS, "Invalid msg iter dir %u\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1935) iov_iter_rw(&msg->msg_iter));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1936) rc = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1937) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1938) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1939)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1940) switch (iov_iter_type(&msg->msg_iter)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1941) case ITER_KVEC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1942) buf = msg->msg_iter.kvec->iov_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1943) to_read = msg->msg_iter.kvec->iov_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1944) rc = smbd_recv_buf(info, buf, to_read);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1945) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1946)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1947) case ITER_BVEC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1948) page = msg->msg_iter.bvec->bv_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1949) page_offset = msg->msg_iter.bvec->bv_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1950) to_read = msg->msg_iter.bvec->bv_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1951) rc = smbd_recv_page(info, page, page_offset, to_read);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1952) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1953)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1954) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1955) /* It's a bug in upper layer to get there */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1956) cifs_dbg(VFS, "Invalid msg type %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1957) iov_iter_type(&msg->msg_iter));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1958) rc = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1959) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1960)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1961) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1962) /* SMBDirect will read it all or nothing */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1963) if (rc > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1964) msg->msg_iter.count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1965) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1966) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1967)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1968) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1969) * Send data to transport
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1970) * Each rqst is transported as a SMBDirect payload
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1971) * rqst: the data to write
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1972) * return value: 0 if successfully write, otherwise error code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1973) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1974) int smbd_send(struct TCP_Server_Info *server,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1975) int num_rqst, struct smb_rqst *rqst_array)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1976) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1977) struct smbd_connection *info = server->smbd_conn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1978) struct kvec vec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1979) int nvecs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1980) int size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1981) unsigned int buflen, remaining_data_length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1982) int start, i, j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1983) int max_iov_size =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1984) info->max_send_size - sizeof(struct smbd_data_transfer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1985) struct kvec *iov;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1986) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1987) struct smb_rqst *rqst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1988) int rqst_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1989)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1990) if (info->transport_status != SMBD_CONNECTED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1991) rc = -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1992) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1993) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1994)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1995) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1996) * Add in the page array if there is one. The caller needs to set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1997) * rq_tailsz to PAGE_SIZE when the buffer has multiple pages and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1998) * ends at page boundary
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1999) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2000) remaining_data_length = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2001) for (i = 0; i < num_rqst; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2002) remaining_data_length += smb_rqst_len(server, &rqst_array[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2003)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2004) if (remaining_data_length > info->max_fragmented_send_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2005) log_write(ERR, "payload size %d > max size %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2006) remaining_data_length, info->max_fragmented_send_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2007) rc = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2008) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2009) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2010)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2011) log_write(INFO, "num_rqst=%d total length=%u\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2012) num_rqst, remaining_data_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2013)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2014) rqst_idx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2015) next_rqst:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2016) rqst = &rqst_array[rqst_idx];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2017) iov = rqst->rq_iov;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2018)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2019) cifs_dbg(FYI, "Sending smb (RDMA): idx=%d smb_len=%lu\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2020) rqst_idx, smb_rqst_len(server, rqst));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2021) for (i = 0; i < rqst->rq_nvec; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2022) dump_smb(iov[i].iov_base, iov[i].iov_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2023)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2024)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2025) log_write(INFO, "rqst_idx=%d nvec=%d rqst->rq_npages=%d rq_pagesz=%d rq_tailsz=%d buflen=%lu\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2026) rqst_idx, rqst->rq_nvec, rqst->rq_npages, rqst->rq_pagesz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2027) rqst->rq_tailsz, smb_rqst_len(server, rqst));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2028)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2029) start = i = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2030) buflen = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2031) while (true) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2032) buflen += iov[i].iov_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2033) if (buflen > max_iov_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2034) if (i > start) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2035) remaining_data_length -=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2036) (buflen-iov[i].iov_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2037) log_write(INFO, "sending iov[] from start=%d i=%d nvecs=%d remaining_data_length=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2038) start, i, i - start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2039) remaining_data_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2040) rc = smbd_post_send_data(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2041) info, &iov[start], i-start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2042) remaining_data_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2043) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2044) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2045) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2046) /* iov[start] is too big, break it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2047) nvecs = (buflen+max_iov_size-1)/max_iov_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2048) log_write(INFO, "iov[%d] iov_base=%p buflen=%d break to %d vectors\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2049) start, iov[start].iov_base,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2050) buflen, nvecs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2051) for (j = 0; j < nvecs; j++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2052) vec.iov_base =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2053) (char *)iov[start].iov_base +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2054) j*max_iov_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2055) vec.iov_len = max_iov_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2056) if (j == nvecs-1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2057) vec.iov_len =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2058) buflen -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2059) max_iov_size*(nvecs-1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2060) remaining_data_length -= vec.iov_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2061) log_write(INFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2062) "sending vec j=%d iov_base=%p iov_len=%zu remaining_data_length=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2063) j, vec.iov_base, vec.iov_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2064) remaining_data_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2065) rc = smbd_post_send_data(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2066) info, &vec, 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2067) remaining_data_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2068) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2069) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2070) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2071) i++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2072) if (i == rqst->rq_nvec)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2073) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2074) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2075) start = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2076) buflen = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2077) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2078) i++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2079) if (i == rqst->rq_nvec) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2080) /* send out all remaining vecs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2081) remaining_data_length -= buflen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2082) log_write(INFO, "sending iov[] from start=%d i=%d nvecs=%d remaining_data_length=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2083) start, i, i - start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2084) remaining_data_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2085) rc = smbd_post_send_data(info, &iov[start],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2086) i-start, remaining_data_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2087) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2088) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2089) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2090) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2091) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2092) log_write(INFO, "looping i=%d buflen=%d\n", i, buflen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2093) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2094)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2095) /* now sending pages if there are any */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2096) for (i = 0; i < rqst->rq_npages; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2097) unsigned int offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2098)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2099) rqst_page_get_length(rqst, i, &buflen, &offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2100) nvecs = (buflen + max_iov_size - 1) / max_iov_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2101) log_write(INFO, "sending pages buflen=%d nvecs=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2102) buflen, nvecs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2103) for (j = 0; j < nvecs; j++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2104) size = max_iov_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2105) if (j == nvecs-1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2106) size = buflen - j*max_iov_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2107) remaining_data_length -= size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2108) log_write(INFO, "sending pages i=%d offset=%d size=%d remaining_data_length=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2109) i, j * max_iov_size + offset, size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2110) remaining_data_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2111) rc = smbd_post_send_page(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2112) info, rqst->rq_pages[i],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2113) j*max_iov_size + offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2114) size, remaining_data_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2115) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2116) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2120) rqst_idx++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2121) if (rqst_idx < num_rqst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2122) goto next_rqst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2124) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2125) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2126) * As an optimization, we don't wait for individual I/O to finish
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2127) * before sending the next one.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2128) * Send them all and wait for pending send count to get to 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2129) * that means all the I/Os have been out and we are good to return
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2130) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2132) wait_event(info->wait_send_pending,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2133) atomic_read(&info->send_pending) == 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2135) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2138) static void register_mr_done(struct ib_cq *cq, struct ib_wc *wc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2139) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2140) struct smbd_mr *mr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2141) struct ib_cqe *cqe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2143) if (wc->status) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2144) log_rdma_mr(ERR, "status=%d\n", wc->status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2145) cqe = wc->wr_cqe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2146) mr = container_of(cqe, struct smbd_mr, cqe);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2147) smbd_disconnect_rdma_connection(mr->conn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2151) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2152) * The work queue function that recovers MRs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2153) * We need to call ib_dereg_mr() and ib_alloc_mr() before this MR can be used
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2154) * again. Both calls are slow, so finish them in a workqueue. This will not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2155) * block I/O path.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2156) * There is one workqueue that recovers MRs, there is no need to lock as the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2157) * I/O requests calling smbd_register_mr will never update the links in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2158) * mr_list.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2159) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2160) static void smbd_mr_recovery_work(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2161) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2162) struct smbd_connection *info =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2163) container_of(work, struct smbd_connection, mr_recovery_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2164) struct smbd_mr *smbdirect_mr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2165) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2167) list_for_each_entry(smbdirect_mr, &info->mr_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2168) if (smbdirect_mr->state == MR_ERROR) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2170) /* recover this MR entry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2171) rc = ib_dereg_mr(smbdirect_mr->mr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2172) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2173) log_rdma_mr(ERR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2174) "ib_dereg_mr failed rc=%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2175) rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2176) smbd_disconnect_rdma_connection(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2177) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2178) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2180) smbdirect_mr->mr = ib_alloc_mr(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2181) info->pd, info->mr_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2182) info->max_frmr_depth);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2183) if (IS_ERR(smbdirect_mr->mr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2184) log_rdma_mr(ERR, "ib_alloc_mr failed mr_type=%x max_frmr_depth=%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2185) info->mr_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2186) info->max_frmr_depth);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2187) smbd_disconnect_rdma_connection(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2188) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2190) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2191) /* This MR is being used, don't recover it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2192) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2194) smbdirect_mr->state = MR_READY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2196) /* smbdirect_mr->state is updated by this function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2197) * and is read and updated by I/O issuing CPUs trying
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2198) * to get a MR, the call to atomic_inc_return
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2199) * implicates a memory barrier and guarantees this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2200) * value is updated before waking up any calls to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2201) * get_mr() from the I/O issuing CPUs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2202) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2203) if (atomic_inc_return(&info->mr_ready_count) == 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2204) wake_up_interruptible(&info->wait_mr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2205) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2208) static void destroy_mr_list(struct smbd_connection *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2209) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2210) struct smbd_mr *mr, *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2212) cancel_work_sync(&info->mr_recovery_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2213) list_for_each_entry_safe(mr, tmp, &info->mr_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2214) if (mr->state == MR_INVALIDATED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2215) ib_dma_unmap_sg(info->id->device, mr->sgl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2216) mr->sgl_count, mr->dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2217) ib_dereg_mr(mr->mr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2218) kfree(mr->sgl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2219) kfree(mr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2220) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2221) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2223) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2224) * Allocate MRs used for RDMA read/write
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2225) * The number of MRs will not exceed hardware capability in responder_resources
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2226) * All MRs are kept in mr_list. The MR can be recovered after it's used
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2227) * Recovery is done in smbd_mr_recovery_work. The content of list entry changes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2228) * as MRs are used and recovered for I/O, but the list links will not change
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2229) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2230) static int allocate_mr_list(struct smbd_connection *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2231) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2232) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2233) struct smbd_mr *smbdirect_mr, *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2235) INIT_LIST_HEAD(&info->mr_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2236) init_waitqueue_head(&info->wait_mr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2237) spin_lock_init(&info->mr_list_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2238) atomic_set(&info->mr_ready_count, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2239) atomic_set(&info->mr_used_count, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2240) init_waitqueue_head(&info->wait_for_mr_cleanup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2241) /* Allocate more MRs (2x) than hardware responder_resources */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2242) for (i = 0; i < info->responder_resources * 2; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2243) smbdirect_mr = kzalloc(sizeof(*smbdirect_mr), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2244) if (!smbdirect_mr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2245) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2246) smbdirect_mr->mr = ib_alloc_mr(info->pd, info->mr_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2247) info->max_frmr_depth);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2248) if (IS_ERR(smbdirect_mr->mr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2249) log_rdma_mr(ERR, "ib_alloc_mr failed mr_type=%x max_frmr_depth=%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2250) info->mr_type, info->max_frmr_depth);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2251) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2252) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2253) smbdirect_mr->sgl = kcalloc(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2254) info->max_frmr_depth,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2255) sizeof(struct scatterlist),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2256) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2257) if (!smbdirect_mr->sgl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2258) log_rdma_mr(ERR, "failed to allocate sgl\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2259) ib_dereg_mr(smbdirect_mr->mr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2260) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2261) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2262) smbdirect_mr->state = MR_READY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2263) smbdirect_mr->conn = info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2265) list_add_tail(&smbdirect_mr->list, &info->mr_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2266) atomic_inc(&info->mr_ready_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2267) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2268) INIT_WORK(&info->mr_recovery_work, smbd_mr_recovery_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2269) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2271) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2272) kfree(smbdirect_mr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2274) list_for_each_entry_safe(smbdirect_mr, tmp, &info->mr_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2275) ib_dereg_mr(smbdirect_mr->mr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2276) kfree(smbdirect_mr->sgl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2277) kfree(smbdirect_mr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2278) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2279) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2280) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2282) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2283) * Get a MR from mr_list. This function waits until there is at least one
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2284) * MR available in the list. It may access the list while the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2285) * smbd_mr_recovery_work is recovering the MR list. This doesn't need a lock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2286) * as they never modify the same places. However, there may be several CPUs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2287) * issueing I/O trying to get MR at the same time, mr_list_lock is used to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2288) * protect this situation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2289) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2290) static struct smbd_mr *get_mr(struct smbd_connection *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2291) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2292) struct smbd_mr *ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2293) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2294) again:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2295) rc = wait_event_interruptible(info->wait_mr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2296) atomic_read(&info->mr_ready_count) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2297) info->transport_status != SMBD_CONNECTED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2298) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2299) log_rdma_mr(ERR, "wait_event_interruptible rc=%x\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2300) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2301) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2303) if (info->transport_status != SMBD_CONNECTED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2304) log_rdma_mr(ERR, "info->transport_status=%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2305) info->transport_status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2306) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2307) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2309) spin_lock(&info->mr_list_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2310) list_for_each_entry(ret, &info->mr_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2311) if (ret->state == MR_READY) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2312) ret->state = MR_REGISTERED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2313) spin_unlock(&info->mr_list_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2314) atomic_dec(&info->mr_ready_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2315) atomic_inc(&info->mr_used_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2316) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2317) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2318) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2320) spin_unlock(&info->mr_list_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2321) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2322) * It is possible that we could fail to get MR because other processes may
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2323) * try to acquire a MR at the same time. If this is the case, retry it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2324) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2325) goto again;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2326) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2327)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2328) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2329) * Register memory for RDMA read/write
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2330) * pages[]: the list of pages to register memory with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2331) * num_pages: the number of pages to register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2332) * tailsz: if non-zero, the bytes to register in the last page
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2333) * writing: true if this is a RDMA write (SMB read), false for RDMA read
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2334) * need_invalidate: true if this MR needs to be locally invalidated after I/O
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2335) * return value: the MR registered, NULL if failed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2336) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2337) struct smbd_mr *smbd_register_mr(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2338) struct smbd_connection *info, struct page *pages[], int num_pages,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2339) int offset, int tailsz, bool writing, bool need_invalidate)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2340) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2341) struct smbd_mr *smbdirect_mr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2342) int rc, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2343) enum dma_data_direction dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2344) struct ib_reg_wr *reg_wr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2345)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2346) if (num_pages > info->max_frmr_depth) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2347) log_rdma_mr(ERR, "num_pages=%d max_frmr_depth=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2348) num_pages, info->max_frmr_depth);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2349) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2350) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2352) smbdirect_mr = get_mr(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2353) if (!smbdirect_mr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2354) log_rdma_mr(ERR, "get_mr returning NULL\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2355) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2356) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2357) smbdirect_mr->need_invalidate = need_invalidate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2358) smbdirect_mr->sgl_count = num_pages;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2359) sg_init_table(smbdirect_mr->sgl, num_pages);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2360)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2361) log_rdma_mr(INFO, "num_pages=0x%x offset=0x%x tailsz=0x%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2362) num_pages, offset, tailsz);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2363)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2364) if (num_pages == 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2365) sg_set_page(&smbdirect_mr->sgl[0], pages[0], tailsz, offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2366) goto skip_multiple_pages;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2367) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2368)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2369) /* We have at least two pages to register */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2370) sg_set_page(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2371) &smbdirect_mr->sgl[0], pages[0], PAGE_SIZE - offset, offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2372) i = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2373) while (i < num_pages - 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2374) sg_set_page(&smbdirect_mr->sgl[i], pages[i], PAGE_SIZE, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2375) i++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2376) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2377) sg_set_page(&smbdirect_mr->sgl[i], pages[i],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2378) tailsz ? tailsz : PAGE_SIZE, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2380) skip_multiple_pages:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2381) dir = writing ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2382) smbdirect_mr->dir = dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2383) rc = ib_dma_map_sg(info->id->device, smbdirect_mr->sgl, num_pages, dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2384) if (!rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2385) log_rdma_mr(ERR, "ib_dma_map_sg num_pages=%x dir=%x rc=%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2386) num_pages, dir, rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2387) goto dma_map_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2388) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2390) rc = ib_map_mr_sg(smbdirect_mr->mr, smbdirect_mr->sgl, num_pages,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2391) NULL, PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2392) if (rc != num_pages) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2393) log_rdma_mr(ERR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2394) "ib_map_mr_sg failed rc = %d num_pages = %x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2395) rc, num_pages);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2396) goto map_mr_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2397) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2398)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2399) ib_update_fast_reg_key(smbdirect_mr->mr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2400) ib_inc_rkey(smbdirect_mr->mr->rkey));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2401) reg_wr = &smbdirect_mr->wr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2402) reg_wr->wr.opcode = IB_WR_REG_MR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2403) smbdirect_mr->cqe.done = register_mr_done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2404) reg_wr->wr.wr_cqe = &smbdirect_mr->cqe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2405) reg_wr->wr.num_sge = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2406) reg_wr->wr.send_flags = IB_SEND_SIGNALED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2407) reg_wr->mr = smbdirect_mr->mr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2408) reg_wr->key = smbdirect_mr->mr->rkey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2409) reg_wr->access = writing ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2410) IB_ACCESS_REMOTE_WRITE | IB_ACCESS_LOCAL_WRITE :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2411) IB_ACCESS_REMOTE_READ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2412)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2413) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2414) * There is no need for waiting for complemtion on ib_post_send
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2415) * on IB_WR_REG_MR. Hardware enforces a barrier and order of execution
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2416) * on the next ib_post_send when we actaully send I/O to remote peer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2417) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2418) rc = ib_post_send(info->id->qp, ®_wr->wr, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2419) if (!rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2420) return smbdirect_mr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2422) log_rdma_mr(ERR, "ib_post_send failed rc=%x reg_wr->key=%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2423) rc, reg_wr->key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2424)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2425) /* If all failed, attempt to recover this MR by setting it MR_ERROR*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2426) map_mr_error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2427) ib_dma_unmap_sg(info->id->device, smbdirect_mr->sgl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2428) smbdirect_mr->sgl_count, smbdirect_mr->dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2429)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2430) dma_map_error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2431) smbdirect_mr->state = MR_ERROR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2432) if (atomic_dec_and_test(&info->mr_used_count))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2433) wake_up(&info->wait_for_mr_cleanup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2434)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2435) smbd_disconnect_rdma_connection(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2436)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2437) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2438) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2439)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2440) static void local_inv_done(struct ib_cq *cq, struct ib_wc *wc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2441) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2442) struct smbd_mr *smbdirect_mr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2443) struct ib_cqe *cqe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2444)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2445) cqe = wc->wr_cqe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2446) smbdirect_mr = container_of(cqe, struct smbd_mr, cqe);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2447) smbdirect_mr->state = MR_INVALIDATED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2448) if (wc->status != IB_WC_SUCCESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2449) log_rdma_mr(ERR, "invalidate failed status=%x\n", wc->status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2450) smbdirect_mr->state = MR_ERROR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2451) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2452) complete(&smbdirect_mr->invalidate_done);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2453) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2455) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2456) * Deregister a MR after I/O is done
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2457) * This function may wait if remote invalidation is not used
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2458) * and we have to locally invalidate the buffer to prevent data is being
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2459) * modified by remote peer after upper layer consumes it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2460) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2461) int smbd_deregister_mr(struct smbd_mr *smbdirect_mr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2462) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2463) struct ib_send_wr *wr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2464) struct smbd_connection *info = smbdirect_mr->conn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2465) int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2466)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2467) if (smbdirect_mr->need_invalidate) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2468) /* Need to finish local invalidation before returning */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2469) wr = &smbdirect_mr->inv_wr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2470) wr->opcode = IB_WR_LOCAL_INV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2471) smbdirect_mr->cqe.done = local_inv_done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2472) wr->wr_cqe = &smbdirect_mr->cqe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2473) wr->num_sge = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2474) wr->ex.invalidate_rkey = smbdirect_mr->mr->rkey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2475) wr->send_flags = IB_SEND_SIGNALED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2476)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2477) init_completion(&smbdirect_mr->invalidate_done);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2478) rc = ib_post_send(info->id->qp, wr, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2479) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2480) log_rdma_mr(ERR, "ib_post_send failed rc=%x\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2481) smbd_disconnect_rdma_connection(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2482) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2483) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2484) wait_for_completion(&smbdirect_mr->invalidate_done);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2485) smbdirect_mr->need_invalidate = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2486) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2487) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2488) * For remote invalidation, just set it to MR_INVALIDATED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2489) * and defer to mr_recovery_work to recover the MR for next use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2490) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2491) smbdirect_mr->state = MR_INVALIDATED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2492)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2493) if (smbdirect_mr->state == MR_INVALIDATED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2494) ib_dma_unmap_sg(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2495) info->id->device, smbdirect_mr->sgl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2496) smbdirect_mr->sgl_count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2497) smbdirect_mr->dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2498) smbdirect_mr->state = MR_READY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2499) if (atomic_inc_return(&info->mr_ready_count) == 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2500) wake_up_interruptible(&info->wait_mr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2501) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2502) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2503) * Schedule the work to do MR recovery for future I/Os MR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2504) * recovery is slow and don't want it to block current I/O
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2505) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2506) queue_work(info->workqueue, &info->mr_recovery_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2507)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2508) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2509) if (atomic_dec_and_test(&info->mr_used_count))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2510) wake_up(&info->wait_for_mr_cleanup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2511)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2512) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2513) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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