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Merge branch 'nvme-4.21' of git://git.infradead.org/nvme into for-4.21/block

Browse Source 
Pull NVMe updates from Christoph:

"Here is the second large chunk of nvme updates for 4.21:

 - host and target support for NVMe over TCP (Sagi Grimberg,
	Roy Shterman, Solganik Alexander)
 - error log page support in target (Chaitanya Kulkarni)

plus small fixes and improvements from Jens Axboe and Chengguang Xu."

* 'nvme-4.21' of git://git.infradead.org/nvme: (33 commits)
  nvme-rdma: support separate queue maps for read and write
  nvme-tcp: support separate queue maps for read and write
  nvme-fabrics: allow user to set nr_write_queues for separate queue maps
  nvme-fabrics: add missing nvmf_ctrl_options documentation
  blk-mq-rdma: pass in queue map to blk_mq_rdma_map_queues
  nvmet: update smart log with num err log entries
  nvmet: add error log page cmd handler
  nvmet: add error log support for file backend
  nvmet: add error log support for bdev backend
  nvmet: add error log support for admin-cmd
  nvmet: add error log support for rdma backend
  nvmet: add error log support for fabrics-cmd
  nvmet: add error log support in the core
  nvmet: add interface to update error-log page
  nvmet: add error-log definitions
  nvme: add error log page slot definition
  nvme: remove nvme_common command cdw10 array
  nvmet: remove unused variable
  nvme: provide fallback for discard alloc failure
  nvme: add __exit annotation
  ...
This commit is contained in:
Jens Axboe 2018-12-13 12:59:37 -07:00
commit 2d9a058e3f
34 changed files with 4794 additions and 213 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
block/blk-mq-rdma.c
View File

@ -29,24 +29,24 @@
* @set->nr_hw_queues, or @dev does not provide an affinity mask for a
* vector, we fallback to the naive mapping.
*/
int blk_mq_rdma_map_queues(struct blk_mq_tag_set *set,
int blk_mq_rdma_map_queues(struct blk_mq_queue_map *map,
struct ib_device *dev, int first_vec)
{
const struct cpumask *mask;
unsigned int queue, cpu;
for (queue = 0; queue < set->nr_hw_queues; queue++) {
for (queue = 0; queue < map->nr_queues; queue++) {
mask = ib_get_vector_affinity(dev, first_vec + queue);
if (!mask)
goto fallback;
for_each_cpu(cpu, mask)
set->map[0].mq_map[cpu] = queue;
map->mq_map[cpu] = map->queue_offset + queue;
}
return 0;
fallback:
return blk_mq_map_queues(&set->map[0]);
return blk_mq_map_queues(map);
}
EXPORT_SYMBOL_GPL(blk_mq_rdma_map_queues);

2
drivers/net/wireless/ath/ath6kl/cfg80211.c
View File

@ -1322,7 +1322,7 @@ static int ath6kl_cfg80211_set_default_key(struct wiphy *wiphy,
struct ath6kl_vif *vif = netdev_priv(ndev);
struct ath6kl_key *key = NULL;
u8 key_usage;
enum crypto_type key_type = NONE_CRYPT;
enum ath6kl_crypto_type key_type = NONE_CRYPT;
ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "%s: index %d\n", __func__, key_index);

2
drivers/net/wireless/ath/ath6kl/common.h
View File

@ -67,7 +67,7 @@ struct ath6kl_llc_snap_hdr {
__be16 eth_type;
} __packed;
enum crypto_type {
enum ath6kl_crypto_type {
NONE_CRYPT = 0x01,
WEP_CRYPT = 0x02,
TKIP_CRYPT = 0x04,

6
drivers/net/wireless/ath/ath6kl/wmi.c
View File

@ -1849,9 +1849,9 @@ int ath6kl_wmi_connect_cmd(struct wmi *wmi, u8 if_idx,
enum network_type nw_type,
enum dot11_auth_mode dot11_auth_mode,
enum auth_mode auth_mode,
enum crypto_type pairwise_crypto,
enum ath6kl_crypto_type pairwise_crypto,
u8 pairwise_crypto_len,
enum crypto_type group_crypto,
enum ath6kl_crypto_type group_crypto,
u8 group_crypto_len, int ssid_len, u8 *ssid,
u8 *bssid, u16 channel, u32 ctrl_flags,
u8 nw_subtype)
@ -2301,7 +2301,7 @@ int ath6kl_wmi_disctimeout_cmd(struct wmi *wmi, u8 if_idx, u8 timeout)
}
int ath6kl_wmi_addkey_cmd(struct wmi *wmi, u8 if_idx, u8 key_index,
enum crypto_type key_type,
enum ath6kl_crypto_type key_type,
u8 key_usage, u8 key_len,
u8 *key_rsc, unsigned int key_rsc_len,
u8 *key_material,

6
drivers/net/wireless/ath/ath6kl/wmi.h
View File

@ -2556,9 +2556,9 @@ int ath6kl_wmi_connect_cmd(struct wmi *wmi, u8 if_idx,
enum network_type nw_type,
enum dot11_auth_mode dot11_auth_mode,
enum auth_mode auth_mode,
enum crypto_type pairwise_crypto,
enum ath6kl_crypto_type pairwise_crypto,
u8 pairwise_crypto_len,
enum crypto_type group_crypto,
enum ath6kl_crypto_type group_crypto,
u8 group_crypto_len, int ssid_len, u8 *ssid,
u8 *bssid, u16 channel, u32 ctrl_flags,
u8 nw_subtype);
@ -2610,7 +2610,7 @@ int ath6kl_wmi_config_debug_module_cmd(struct wmi *wmi, u32 valid, u32 config);
int ath6kl_wmi_get_stats_cmd(struct wmi *wmi, u8 if_idx);
int ath6kl_wmi_addkey_cmd(struct wmi *wmi, u8 if_idx, u8 key_index,
enum crypto_type key_type,
enum ath6kl_crypto_type key_type,
u8 key_usage, u8 key_len,
u8 *key_rsc, unsigned int key_rsc_len,
u8 *key_material,

15
drivers/nvme/host/Kconfig
View File

@ -57,3 +57,18 @@ config NVME_FC
from https://github.com/linux-nvme/nvme-cli.
If unsure, say N.
config NVME_TCP
tristate "NVM Express over Fabrics TCP host driver"
depends on INET
depends on BLK_DEV_NVME
select NVME_FABRICS
help
This provides support for the NVMe over Fabrics protocol using
the TCP transport. This allows you to use remote block devices
exported using the NVMe protocol set.
To configure a NVMe over Fabrics controller use the nvme-cli tool
from https://github.com/linux-nvme/nvme-cli.
If unsure, say N.

3
drivers/nvme/host/Makefile
View File

@ -7,6 +7,7 @@ obj-$(CONFIG_BLK_DEV_NVME) += nvme.o
obj-$(CONFIG_NVME_FABRICS) += nvme-fabrics.o
obj-$(CONFIG_NVME_RDMA) += nvme-rdma.o
obj-$(CONFIG_NVME_FC) += nvme-fc.o
obj-$(CONFIG_NVME_TCP) += nvme-tcp.o
nvme-core-y := core.o
nvme-core-$(CONFIG_TRACING) += trace.o
@ -21,3 +22,5 @@ nvme-fabrics-y += fabrics.o
nvme-rdma-y += rdma.o
nvme-fc-y += fc.o
nvme-tcp-y += tcp.o

61
drivers/nvme/host/core.c
View File

@ -564,9 +564,19 @@ static blk_status_t nvme_setup_discard(struct nvme_ns *ns, struct request *req,
struct nvme_dsm_range *range;
struct bio *bio;
range = kmalloc_array(segments, sizeof(*range), GFP_ATOMIC);
if (!range)
return BLK_STS_RESOURCE;
range = kmalloc_array(segments, sizeof(*range),
GFP_ATOMIC | __GFP_NOWARN);
if (!range) {
/*
* If we fail allocation our range, fallback to the controller
* discard page. If that's also busy, it's safe to return
* busy, as we know we can make progress once that's freed.
*/
if (test_and_set_bit_lock(0, &ns->ctrl->discard_page_busy))
return BLK_STS_RESOURCE;
range = page_address(ns->ctrl->discard_page);
}
__rq_for_each_bio(bio, req) {
u64 slba = nvme_block_nr(ns, bio->bi_iter.bi_sector);
@ -581,7 +591,10 @@ static blk_status_t nvme_setup_discard(struct nvme_ns *ns, struct request *req,
}
if (WARN_ON_ONCE(n != segments)) {
kfree(range);
if (virt_to_page(range) == ns->ctrl->discard_page)
clear_bit_unlock(0, &ns->ctrl->discard_page_busy);
else
kfree(range);
return BLK_STS_IOERR;
}
@ -664,8 +677,13 @@ void nvme_cleanup_cmd(struct request *req)
blk_rq_bytes(req) >> ns->lba_shift);
}
if (req->rq_flags & RQF_SPECIAL_PAYLOAD) {
kfree(page_address(req->special_vec.bv_page) +
req->special_vec.bv_offset);
struct nvme_ns *ns = req->rq_disk->private_data;
struct page *page = req->special_vec.bv_page;
if (page == ns->ctrl->discard_page)
clear_bit_unlock(0, &ns->ctrl->discard_page_busy);
else
kfree(page_address(page) + req->special_vec.bv_offset);
}
}
EXPORT_SYMBOL_GPL(nvme_cleanup_cmd);
@ -1265,12 +1283,12 @@ static int nvme_user_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
c.common.nsid = cpu_to_le32(cmd.nsid);
c.common.cdw2[0] = cpu_to_le32(cmd.cdw2);
c.common.cdw2[1] = cpu_to_le32(cmd.cdw3);
c.common.cdw10[0] = cpu_to_le32(cmd.cdw10);
c.common.cdw10[1] = cpu_to_le32(cmd.cdw11);
c.common.cdw10[2] = cpu_to_le32(cmd.cdw12);
c.common.cdw10[3] = cpu_to_le32(cmd.cdw13);
c.common.cdw10[4] = cpu_to_le32(cmd.cdw14);
c.common.cdw10[5] = cpu_to_le32(cmd.cdw15);
c.common.cdw10 = cpu_to_le32(cmd.cdw10);
c.common.cdw11 = cpu_to_le32(cmd.cdw11);
c.common.cdw12 = cpu_to_le32(cmd.cdw12);
c.common.cdw13 = cpu_to_le32(cmd.cdw13);
c.common.cdw14 = cpu_to_le32(cmd.cdw14);
c.common.cdw15 = cpu_to_le32(cmd.cdw15);
if (cmd.timeout_ms)
timeout = msecs_to_jiffies(cmd.timeout_ms);
@ -1631,7 +1649,7 @@ static int nvme_pr_command(struct block_device *bdev, u32 cdw10,
memset(&c, 0, sizeof(c));
c.common.opcode = op;
c.common.nsid = cpu_to_le32(ns->head->ns_id);
c.common.cdw10[0] = cpu_to_le32(cdw10);
c.common.cdw10 = cpu_to_le32(cdw10);
ret = nvme_submit_sync_cmd(ns->queue, &c, data, 16);
nvme_put_ns_from_disk(head, srcu_idx);
@ -1705,8 +1723,8 @@ int nvme_sec_submit(void *data, u16 spsp, u8 secp, void *buffer, size_t len,
else
cmd.common.opcode = nvme_admin_security_recv;
cmd.common.nsid = 0;
cmd.common.cdw10[0] = cpu_to_le32(((u32)secp) << 24 | ((u32)spsp) << 8);
cmd.common.cdw10[1] = cpu_to_le32(len);
cmd.common.cdw10 = cpu_to_le32(((u32)secp) << 24 | ((u32)spsp) << 8);
cmd.common.cdw11 = cpu_to_le32(len);
return __nvme_submit_sync_cmd(ctrl->admin_q, &cmd, NULL, buffer, len,
ADMIN_TIMEOUT, NVME_QID_ANY, 1, 0);
@ -3578,6 +3596,7 @@ static void nvme_free_ctrl(struct device *dev)
ida_simple_remove(&nvme_instance_ida, ctrl->instance);
kfree(ctrl->effects);
nvme_mpath_uninit(ctrl);
kfree(ctrl->discard_page);
if (subsys) {
mutex_lock(&subsys->lock);
@ -3618,6 +3637,14 @@ int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev,
memset(&ctrl->ka_cmd, 0, sizeof(ctrl->ka_cmd));
ctrl->ka_cmd.common.opcode = nvme_admin_keep_alive;
BUILD_BUG_ON(NVME_DSM_MAX_RANGES * sizeof(struct nvme_dsm_range) >
PAGE_SIZE);
ctrl->discard_page = alloc_page(GFP_KERNEL);
if (!ctrl->discard_page) {
ret = -ENOMEM;
goto out;
}
ret = ida_simple_get(&nvme_instance_ida, 0, 0, GFP_KERNEL);
if (ret < 0)
goto out;
@ -3655,6 +3682,8 @@ int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev,
out_release_instance:
ida_simple_remove(&nvme_instance_ida, ctrl->instance);
out:
if (ctrl->discard_page)
__free_page(ctrl->discard_page);
return ret;
}
EXPORT_SYMBOL_GPL(nvme_init_ctrl);
@ -3802,7 +3831,7 @@ int __init nvme_core_init(void)
return result;
}
void nvme_core_exit(void)
void __exit nvme_core_exit(void)
{
ida_destroy(&nvme_subsystems_ida);
class_destroy(nvme_subsys_class);

23
drivers/nvme/host/fabrics.c
View File

@ -614,6 +614,9 @@ static const match_table_t opt_tokens = {
{ NVMF_OPT_HOST_ID, "hostid=%s" },
{ NVMF_OPT_DUP_CONNECT, "duplicate_connect" },
{ NVMF_OPT_DISABLE_SQFLOW, "disable_sqflow" },
{ NVMF_OPT_HDR_DIGEST, "hdr_digest" },
{ NVMF_OPT_DATA_DIGEST, "data_digest" },
{ NVMF_OPT_NR_WRITE_QUEUES, "nr_write_queues=%d" },
{ NVMF_OPT_ERR, NULL }
};
@ -633,6 +636,8 @@ static int nvmf_parse_options(struct nvmf_ctrl_options *opts,
opts->reconnect_delay = NVMF_DEF_RECONNECT_DELAY;
opts->kato = NVME_DEFAULT_KATO;
opts->duplicate_connect = false;
opts->hdr_digest = false;
opts->data_digest = false;
options = o = kstrdup(buf, GFP_KERNEL);
if (!options)
@ -827,6 +832,24 @@ static int nvmf_parse_options(struct nvmf_ctrl_options *opts,
case NVMF_OPT_DISABLE_SQFLOW:
opts->disable_sqflow = true;
break;
case NVMF_OPT_HDR_DIGEST:
opts->hdr_digest = true;
break;
case NVMF_OPT_DATA_DIGEST:
opts->data_digest = true;
break;
case NVMF_OPT_NR_WRITE_QUEUES:
if (match_int(args, &token)) {
ret = -EINVAL;
goto out;
}
if (token <= 0) {
pr_err("Invalid nr_write_queues %d\n", token);
ret = -EINVAL;
goto out;
}
opts->nr_write_queues = token;
break;
default:
pr_warn("unknown parameter or missing value '%s' in ctrl creation request\n",
p);

10
drivers/nvme/host/fabrics.h
View File

@ -59,6 +59,9 @@ enum {
NVMF_OPT_HOST_ID = 1 << 12,
NVMF_OPT_DUP_CONNECT = 1 << 13,
NVMF_OPT_DISABLE_SQFLOW = 1 << 14,
NVMF_OPT_HDR_DIGEST = 1 << 15,
NVMF_OPT_DATA_DIGEST = 1 << 16,
NVMF_OPT_NR_WRITE_QUEUES = 1 << 17,
};
/**
@ -86,6 +89,10 @@ enum {
* @max_reconnects: maximum number of allowed reconnect attempts before removing
* the controller, (-1) means reconnect forever, zero means remove
* immediately;
* @disable_sqflow: disable controller sq flow control
* @hdr_digest: generate/verify header digest (TCP)
* @data_digest: generate/verify data digest (TCP)
* @nr_write_queues: number of queues for write I/O
*/
struct nvmf_ctrl_options {
unsigned mask;
@ -103,6 +110,9 @@ struct nvmf_ctrl_options {
struct nvmf_host *host;
int max_reconnects;
bool disable_sqflow;
bool hdr_digest;
bool data_digest;
unsigned int nr_write_queues;
};
/*

6
drivers/nvme/host/lightnvm.c
View File

@ -937,9 +937,9 @@ static int nvme_nvm_user_vcmd(struct nvme_ns *ns, int admin,
/* cdw11-12 */
c.ph_rw.length = cpu_to_le16(vcmd.nppas);
c.ph_rw.control = cpu_to_le16(vcmd.control);
c.common.cdw10[3] = cpu_to_le32(vcmd.cdw13);
c.common.cdw10[4] = cpu_to_le32(vcmd.cdw14);
c.common.cdw10[5] = cpu_to_le32(vcmd.cdw15);
c.common.cdw13 = cpu_to_le32(vcmd.cdw13);
c.common.cdw14 = cpu_to_le32(vcmd.cdw14);
c.common.cdw15 = cpu_to_le32(vcmd.cdw15);
if (vcmd.timeout_ms)
timeout = msecs_to_jiffies(vcmd.timeout_ms);

5
drivers/nvme/host/nvme.h
View File

@ -241,6 +241,9 @@ struct nvme_ctrl {
u16 maxcmd;
int nr_reconnects;
struct nvmf_ctrl_options *opts;
struct page *discard_page;
unsigned long discard_page_busy;
};
struct nvme_subsystem {
@ -565,6 +568,6 @@ static inline struct nvme_ns *nvme_get_ns_from_dev(struct device *dev)
}
int __init nvme_core_init(void);
void nvme_core_exit(void);
void __exit nvme_core_exit(void);
#endif /* _NVME_H */

28
drivers/nvme/host/rdma.c
View File

@ -645,6 +645,8 @@ static int nvme_rdma_alloc_io_queues(struct nvme_rdma_ctrl *ctrl)
nr_io_queues = min_t(unsigned int, nr_io_queues,
ibdev->num_comp_vectors);
nr_io_queues += min(opts->nr_write_queues, num_online_cpus());
ret = nvme_set_queue_count(&ctrl->ctrl, &nr_io_queues);
if (ret)
return ret;
@ -714,6 +716,7 @@ static struct blk_mq_tag_set *nvme_rdma_alloc_tagset(struct nvme_ctrl *nctrl,
set->driver_data = ctrl;
set->nr_hw_queues = nctrl->queue_count - 1;
set->timeout = NVME_IO_TIMEOUT;
set->nr_maps = 2 /* default + read */;
}
ret = blk_mq_alloc_tag_set(set);
@ -1751,7 +1754,25 @@ static int nvme_rdma_map_queues(struct blk_mq_tag_set *set)
{
struct nvme_rdma_ctrl *ctrl = set->driver_data;
return blk_mq_rdma_map_queues(set, ctrl->device->dev, 0);
set->map[HCTX_TYPE_DEFAULT].queue_offset = 0;
set->map[HCTX_TYPE_READ].nr_queues = ctrl->ctrl.opts->nr_io_queues;
if (ctrl->ctrl.opts->nr_write_queues) {
/* separate read/write queues */
set->map[HCTX_TYPE_DEFAULT].nr_queues =
ctrl->ctrl.opts->nr_write_queues;
set->map[HCTX_TYPE_READ].queue_offset =
ctrl->ctrl.opts->nr_write_queues;
} else {
/* mixed read/write queues */
set->map[HCTX_TYPE_DEFAULT].nr_queues =
ctrl->ctrl.opts->nr_io_queues;
set->map[HCTX_TYPE_READ].queue_offset = 0;
}
blk_mq_rdma_map_queues(&set->map[HCTX_TYPE_DEFAULT],
ctrl->device->dev, 0);
blk_mq_rdma_map_queues(&set->map[HCTX_TYPE_READ],
ctrl->device->dev, 0);
return 0;
}
static const struct blk_mq_ops nvme_rdma_mq_ops = {
@ -1906,7 +1927,7 @@ static struct nvme_ctrl *nvme_rdma_create_ctrl(struct device *dev,
INIT_WORK(&ctrl->err_work, nvme_rdma_error_recovery_work);
INIT_WORK(&ctrl->ctrl.reset_work, nvme_rdma_reset_ctrl_work);
ctrl->ctrl.queue_count = opts->nr_io_queues + 1; /* +1 for admin queue */
ctrl->ctrl.queue_count = opts->nr_io_queues + opts->nr_write_queues + 1;
ctrl->ctrl.sqsize = opts->queue_size - 1;
ctrl->ctrl.kato = opts->kato;
@ -1957,7 +1978,8 @@ static struct nvmf_transport_ops nvme_rdma_transport = {
.module = THIS_MODULE,
.required_opts = NVMF_OPT_TRADDR,
.allowed_opts = NVMF_OPT_TRSVCID | NVMF_OPT_RECONNECT_DELAY |
NVMF_OPT_HOST_TRADDR | NVMF_OPT_CTRL_LOSS_TMO,
NVMF_OPT_HOST_TRADDR | NVMF_OPT_CTRL_LOSS_TMO |
NVMF_OPT_NR_WRITE_QUEUES,
.create_ctrl = nvme_rdma_create_ctrl,
};

2277
drivers/nvme/host/tcp.c Normal file
View File

File diff suppressed because it is too large Load Diff

4
drivers/nvme/host/trace.h
View File

@ -115,8 +115,8 @@ TRACE_EVENT(nvme_setup_cmd,
__entry->nsid = le32_to_cpu(cmd->common.nsid);
__entry->metadata = le64_to_cpu(cmd->common.metadata);
__assign_disk_name(__entry->disk, req->rq_disk);
memcpy(__entry->cdw10, cmd->common.cdw10,
sizeof(__entry->cdw10));
memcpy(__entry->cdw10, &cmd->common.cdw10,
6 * sizeof(__entry->cdw10));
),
TP_printk("nvme%d: %sqid=%d, cmdid=%u, nsid=%u, flags=0x%x, meta=0x%llx, cmd=(%s %s)",
__entry->ctrl_id, __print_disk_name(__entry->disk),

10
drivers/nvme/target/Kconfig
View File

@ -60,3 +60,13 @@ config NVME_TARGET_FCLOOP
to test NVMe-FC transport interfaces.
If unsure, say N.
config NVME_TARGET_TCP
tristate "NVMe over Fabrics TCP target support"
depends on INET
depends on NVME_TARGET
help
This enables the NVMe TCP target support, which allows exporting NVMe
devices over TCP.
If unsure, say N.

2
drivers/nvme/target/Makefile
View File

@ -5,6 +5,7 @@ obj-$(CONFIG_NVME_TARGET_LOOP) += nvme-loop.o
obj-$(CONFIG_NVME_TARGET_RDMA) += nvmet-rdma.o
obj-$(CONFIG_NVME_TARGET_FC) += nvmet-fc.o
obj-$(CONFIG_NVME_TARGET_FCLOOP) += nvme-fcloop.o
obj-$(CONFIG_NVME_TARGET_TCP) += nvmet-tcp.o
nvmet-y += core.o configfs.o admin-cmd.o fabrics-cmd.o \
discovery.o io-cmd-file.o io-cmd-bdev.o
@ -12,3 +13,4 @@ nvme-loop-y += loop.o
nvmet-rdma-y += rdma.o
nvmet-fc-y += fc.o
nvme-fcloop-y += fcloop.o
nvmet-tcp-y += tcp.o

76
drivers/nvme/target/admin-cmd.c
View File

@ -37,6 +37,34 @@ static void nvmet_execute_get_log_page_noop(struct nvmet_req *req)
nvmet_req_complete(req, nvmet_zero_sgl(req, 0, req->data_len));
}
static void nvmet_execute_get_log_page_error(struct nvmet_req *req)
{
struct nvmet_ctrl *ctrl = req->sq->ctrl;
u16 status = NVME_SC_SUCCESS;
unsigned long flags;
off_t offset = 0;
u64 slot;
u64 i;
spin_lock_irqsave(&ctrl->error_lock, flags);
slot = ctrl->err_counter % NVMET_ERROR_LOG_SLOTS;
for (i = 0; i < NVMET_ERROR_LOG_SLOTS; i++) {
status = nvmet_copy_to_sgl(req, offset, &ctrl->slots[slot],
sizeof(struct nvme_error_slot));
if (status)
break;
if (slot == 0)
slot = NVMET_ERROR_LOG_SLOTS - 1;
else
slot--;
offset += sizeof(struct nvme_error_slot);
}
spin_unlock_irqrestore(&ctrl->error_lock, flags);
nvmet_req_complete(req, status);
}
static u16 nvmet_get_smart_log_nsid(struct nvmet_req *req,
struct nvme_smart_log *slog)
{
@ -47,6 +75,7 @@ static u16 nvmet_get_smart_log_nsid(struct nvmet_req *req,
if (!ns) {
pr_err("Could not find namespace id : %d\n",
le32_to_cpu(req->cmd->get_log_page.nsid));
req->error_loc = offsetof(struct nvme_rw_command, nsid);
return NVME_SC_INVALID_NS;
}
@ -106,6 +135,7 @@ static void nvmet_execute_get_log_page_smart(struct nvmet_req *req)
{
struct nvme_smart_log *log;
u16 status = NVME_SC_INTERNAL;
unsigned long flags;
if (req->data_len != sizeof(*log))
goto out;
@ -121,6 +151,11 @@ static void nvmet_execute_get_log_page_smart(struct nvmet_req *req)
if (status)
goto out_free_log;
spin_lock_irqsave(&req->sq->ctrl->error_lock, flags);
put_unaligned_le64(req->sq->ctrl->err_counter,
&log->num_err_log_entries);
spin_unlock_irqrestore(&req->sq->ctrl->error_lock, flags);
status = nvmet_copy_to_sgl(req, 0, log, sizeof(*log));
out_free_log:
kfree(log);
@ -380,6 +415,7 @@ static void nvmet_execute_identify_ns(struct nvmet_req *req)
u16 status = 0;
if (le32_to_cpu(req->cmd->identify.nsid) == NVME_NSID_ALL) {
req->error_loc = offsetof(struct nvme_identify, nsid);
status = NVME_SC_INVALID_NS | NVME_SC_DNR;
goto out;
}
@ -500,6 +536,7 @@ static void nvmet_execute_identify_desclist(struct nvmet_req *req)
ns = nvmet_find_namespace(req->sq->ctrl, req->cmd->identify.nsid);
if (!ns) {
req->error_loc = offsetof(struct nvme_identify, nsid);
status = NVME_SC_INVALID_NS | NVME_SC_DNR;
goto out;
}
@ -557,13 +594,15 @@ static u16 nvmet_write_protect_flush_sync(struct nvmet_req *req)
static u16 nvmet_set_feat_write_protect(struct nvmet_req *req)
{
u32 write_protect = le32_to_cpu(req->cmd->common.cdw10[1]);
u32 write_protect = le32_to_cpu(req->cmd->common.cdw11);
struct nvmet_subsys *subsys = req->sq->ctrl->subsys;
u16 status = NVME_SC_FEATURE_NOT_CHANGEABLE;
req->ns = nvmet_find_namespace(req->sq->ctrl, req->cmd->rw.nsid);
if (unlikely(!req->ns))
if (unlikely(!req->ns)) {
req->error_loc = offsetof(struct nvme_common_command, nsid);
return status;
}
mutex_lock(&subsys->lock);
switch (write_protect) {
@ -589,7 +628,7 @@ static u16 nvmet_set_feat_write_protect(struct nvmet_req *req)
u16 nvmet_set_feat_kato(struct nvmet_req *req)
{
u32 val32 = le32_to_cpu(req->cmd->common.cdw10[1]);
u32 val32 = le32_to_cpu(req->cmd->common.cdw11);
req->sq->ctrl->kato = DIV_ROUND_UP(val32, 1000);
@ -600,10 +639,12 @@ u16 nvmet_set_feat_kato(struct nvmet_req *req)
u16 nvmet_set_feat_async_event(struct nvmet_req *req, u32 mask)
{
u32 val32 = le32_to_cpu(req->cmd->common.cdw10[1]);
u32 val32 = le32_to_cpu(req->cmd->common.cdw11);
if (val32 & ~mask)
if (val32 & ~mask) {
req->error_loc = offsetof(struct nvme_common_command, cdw11);
return NVME_SC_INVALID_FIELD | NVME_SC_DNR;
}
WRITE_ONCE(req->sq->ctrl->aen_enabled, val32);
nvmet_set_result(req, val32);
@ -614,7 +655,7 @@ u16 nvmet_set_feat_async_event(struct nvmet_req *req, u32 mask)
static void nvmet_execute_set_features(struct nvmet_req *req)
{
struct nvmet_subsys *subsys = req->sq->ctrl->subsys;
u32 cdw10 = le32_to_cpu(req->cmd->common.cdw10[0]);
u32 cdw10 = le32_to_cpu(req->cmd->common.cdw10);
u16 status = 0;
switch (cdw10 & 0xff) {
@ -635,6 +676,7 @@ static void nvmet_execute_set_features(struct nvmet_req *req)
status = nvmet_set_feat_write_protect(req);
break;
default:
req->error_loc = offsetof(struct nvme_common_command, cdw10);
status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
break;
}
@ -648,9 +690,10 @@ static u16 nvmet_get_feat_write_protect(struct nvmet_req *req)
u32 result;
req->ns = nvmet_find_namespace(req->sq->ctrl, req->cmd->common.nsid);
if (!req->ns)
if (!req->ns) {
req->error_loc = offsetof(struct nvme_common_command, nsid);
return NVME_SC_INVALID_NS | NVME_SC_DNR;
}
mutex_lock(&subsys->lock);
if (req->ns->readonly == true)
result = NVME_NS_WRITE_PROTECT;
@ -675,7 +718,7 @@ void nvmet_get_feat_async_event(struct nvmet_req *req)
static void nvmet_execute_get_features(struct nvmet_req *req)
{
struct nvmet_subsys *subsys = req->sq->ctrl->subsys;
u32 cdw10 = le32_to_cpu(req->cmd->common.cdw10[0]);
u32 cdw10 = le32_to_cpu(req->cmd->common.cdw10);
u16 status = 0;
switch (cdw10 & 0xff) {
@ -715,7 +758,9 @@ static void nvmet_execute_get_features(struct nvmet_req *req)
break;
case NVME_FEAT_HOST_ID:
/* need 128-bit host identifier flag */
if (!(req->cmd->common.cdw10[1] & cpu_to_le32(1 << 0))) {
if (!(req->cmd->common.cdw11 & cpu_to_le32(1 << 0))) {
req->error_loc =
offsetof(struct nvme_common_command, cdw11);
status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
break;
}
@ -727,6 +772,8 @@ static void nvmet_execute_get_features(struct nvmet_req *req)
status = nvmet_get_feat_write_protect(req);
break;
default:
req->error_loc =
offsetof(struct nvme_common_command, cdw10);
status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
break;
}
@ -776,13 +823,7 @@ u16 nvmet_parse_admin_cmd(struct nvmet_req *req)
switch (cmd->get_log_page.lid) {
case NVME_LOG_ERROR:
/*
* We currently never set the More bit in the status
* field, so all error log entries are invalid and can
* be zeroed out. This is called a minum viable
* implementation (TM) of this mandatory log page.
*/
req->execute = nvmet_execute_get_log_page_noop;
req->execute = nvmet_execute_get_log_page_error;
return 0;
case NVME_LOG_SMART:
req->execute = nvmet_execute_get_log_page_smart;
@ -848,5 +889,6 @@ u16 nvmet_parse_admin_cmd(struct nvmet_req *req)
pr_err("unhandled cmd %d on qid %d\n", cmd->common.opcode,
req->sq->qid);
req->error_loc = offsetof(struct nvme_common_command, opcode);
return NVME_SC_INVALID_OPCODE | NVME_SC_DNR;
}

1
drivers/nvme/target/configfs.c
View File

@ -34,6 +34,7 @@ static const struct nvmet_transport_name {
} nvmet_transport_names[] = {
{ NVMF_TRTYPE_RDMA, "rdma" },
{ NVMF_TRTYPE_FC, "fc" },
{ NVMF_TRTYPE_TCP, "tcp" },
{ NVMF_TRTYPE_LOOP, "loop" },
};

106
drivers/nvme/target/core.c
View File

@ -45,28 +45,72 @@ u32 nvmet_ana_group_enabled[NVMET_MAX_ANAGRPS + 1];
u64 nvmet_ana_chgcnt;
DECLARE_RWSEM(nvmet_ana_sem);
inline u16 errno_to_nvme_status(struct nvmet_req *req, int errno)
{
u16 status;
switch (errno) {
case -ENOSPC:
req->error_loc = offsetof(struct nvme_rw_command, length);
status = NVME_SC_CAP_EXCEEDED | NVME_SC_DNR;
break;
case -EREMOTEIO:
req->error_loc = offsetof(struct nvme_rw_command, slba);
status = NVME_SC_LBA_RANGE | NVME_SC_DNR;
break;
case -EOPNOTSUPP:
req->error_loc = offsetof(struct nvme_common_command, opcode);
switch (req->cmd->common.opcode) {
case nvme_cmd_dsm:
case nvme_cmd_write_zeroes:
status = NVME_SC_ONCS_NOT_SUPPORTED | NVME_SC_DNR;
break;
default:
status = NVME_SC_INVALID_OPCODE | NVME_SC_DNR;
}
break;
case -ENODATA:
req->error_loc = offsetof(struct nvme_rw_command, nsid);
status = NVME_SC_ACCESS_DENIED;
break;
case -EIO:
/* FALLTHRU */
default:
req->error_loc = offsetof(struct nvme_common_command, opcode);
status = NVME_SC_INTERNAL | NVME_SC_DNR;
}
return status;
}
static struct nvmet_subsys *nvmet_find_get_subsys(struct nvmet_port *port,
const char *subsysnqn);
u16 nvmet_copy_to_sgl(struct nvmet_req *req, off_t off, const void *buf,
size_t len)
{
if (sg_pcopy_from_buffer(req->sg, req->sg_cnt, buf, len, off) != len)
if (sg_pcopy_from_buffer(req->sg, req->sg_cnt, buf, len, off) != len) {
req->error_loc = offsetof(struct nvme_common_command, dptr);
return NVME_SC_SGL_INVALID_DATA | NVME_SC_DNR;
}
return 0;
}
u16 nvmet_copy_from_sgl(struct nvmet_req *req, off_t off, void *buf, size_t len)
{
if (sg_pcopy_to_buffer(req->sg, req->sg_cnt, buf, len, off) != len)
if (sg_pcopy_to_buffer(req->sg, req->sg_cnt, buf, len, off) != len) {
req->error_loc = offsetof(struct nvme_common_command, dptr);
return NVME_SC_SGL_INVALID_DATA | NVME_SC_DNR;
}
return 0;
}
u16 nvmet_zero_sgl(struct nvmet_req *req, off_t off, size_t len)
{
if (sg_zero_buffer(req->sg, req->sg_cnt, len, off) != len)
if (sg_zero_buffer(req->sg, req->sg_cnt, len, off) != len) {
req->error_loc = offsetof(struct nvme_common_command, dptr);
return NVME_SC_SGL_INVALID_DATA | NVME_SC_DNR;
}
return 0;
}
@ -611,14 +655,44 @@ static void nvmet_update_sq_head(struct nvmet_req *req)
req->rsp->sq_head = cpu_to_le16(req->sq->sqhd & 0x0000FFFF);
}
static void nvmet_set_error(struct nvmet_req *req, u16 status)
{
struct nvmet_ctrl *ctrl = req->sq->ctrl;
struct nvme_error_slot *new_error_slot;
unsigned long flags;
req->rsp->status = cpu_to_le16(status << 1);
if (!ctrl || req->error_loc == -1)
return;
spin_lock_irqsave(&ctrl->error_lock, flags);
ctrl->err_counter++;
new_error_slot =
&ctrl->slots[ctrl->err_counter % NVMET_ERROR_LOG_SLOTS];
new_error_slot->error_count = cpu_to_le64(ctrl->err_counter);
new_error_slot->sqid = cpu_to_le16(req->sq->qid);
new_error_slot->cmdid = cpu_to_le16(req->cmd->common.command_id);
new_error_slot->status_field = cpu_to_le16(status << 1);
new_error_slot->param_error_location = cpu_to_le16(req->error_loc);
new_error_slot->lba = cpu_to_le64(req->error_slba);
new_error_slot->nsid = req->cmd->common.nsid;
spin_unlock_irqrestore(&ctrl->error_lock, flags);
/* set the more bit for this request */
req->rsp->status |= cpu_to_le16(1 << 14);
}
static void __nvmet_req_complete(struct nvmet_req *req, u16 status)
{
if (!req->sq->sqhd_disabled)
nvmet_update_sq_head(req);
req->rsp->sq_id = cpu_to_le16(req->sq->qid);
req->rsp->command_id = req->cmd->common.command_id;
if (unlikely(status))
nvmet_set_status(req, status);
nvmet_set_error(req, status);
if (req->ns)
nvmet_put_namespace(req->ns);
req->ops->queue_response(req);
@ -739,14 +813,20 @@ static u16 nvmet_parse_io_cmd(struct nvmet_req *req)
return ret;
req->ns = nvmet_find_namespace(req->sq->ctrl, cmd->rw.nsid);
if (unlikely(!req->ns))
if (unlikely(!req->ns)) {
req->error_loc = offsetof(struct nvme_common_command, nsid);
return NVME_SC_INVALID_NS | NVME_SC_DNR;
}
ret = nvmet_check_ana_state(req->port, req->ns);
if (unlikely(ret))
if (unlikely(ret)) {
req->error_loc = offsetof(struct nvme_common_command, nsid);
return ret;
}
ret = nvmet_io_cmd_check_access(req);
if (unlikely(ret))
if (unlikely(ret)) {
req->error_loc = offsetof(struct nvme_common_command, nsid);
return ret;
}
if (req->ns->file)
return nvmet_file_parse_io_cmd(req);
@ -769,9 +849,12 @@ bool nvmet_req_init(struct nvmet_req *req, struct nvmet_cq *cq,
req->rsp->status = 0;
req->rsp->sq_head = 0;
req->ns = NULL;
req->error_loc = -1;
req->error_slba = 0;
/* no support for fused commands yet */
if (unlikely(flags & (NVME_CMD_FUSE_FIRST | NVME_CMD_FUSE_SECOND))) {
req->error_loc = offsetof(struct nvme_common_command, flags);
status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
goto fail;
}
@ -782,6 +865,7 @@ bool nvmet_req_init(struct nvmet_req *req, struct nvmet_cq *cq,
* byte aligned.
*/
if (unlikely((flags & NVME_CMD_SGL_ALL) != NVME_CMD_SGL_METABUF)) {
req->error_loc = offsetof(struct nvme_common_command, flags);
status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
goto fail;
}
@ -827,9 +911,10 @@ EXPORT_SYMBOL_GPL(nvmet_req_uninit);
void nvmet_req_execute(struct nvmet_req *req)
{
if (unlikely(req->data_len != req->transfer_len))
if (unlikely(req->data_len != req->transfer_len)) {
req->error_loc = offsetof(struct nvme_common_command, dptr);
nvmet_req_complete(req, NVME_SC_SGL_INVALID_DATA | NVME_SC_DNR);
else
} else
req->execute(req);
}
EXPORT_SYMBOL_GPL(nvmet_req_execute);
@ -1174,6 +1259,9 @@ u16 nvmet_alloc_ctrl(const char *subsysnqn, const char *hostnqn,
/* keep-alive timeout in seconds */
ctrl->kato = DIV_ROUND_UP(kato, 1000);
ctrl->err_counter = 0;
spin_lock_init(&ctrl->error_lock);
nvmet_start_keep_alive_timer(ctrl);
mutex_lock(&subsys->lock);

14
drivers/nvme/target/discovery.c
View File

@ -247,7 +247,7 @@ static void nvmet_execute_identify_disc_ctrl(struct nvmet_req *req)
static void nvmet_execute_disc_set_features(struct nvmet_req *req)
{
u32 cdw10 = le32_to_cpu(req->cmd->common.cdw10[0]);
u32 cdw10 = le32_to_cpu(req->cmd->common.cdw10);
u16 stat;
switch (cdw10 & 0xff) {
@ -259,6 +259,8 @@ static void nvmet_execute_disc_set_features(struct nvmet_req *req)
NVMET_DISC_AEN_CFG_OPTIONAL);
break;
default:
req->error_loc =
offsetof(struct nvme_common_command, cdw10);
stat = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
break;
}
@ -268,7 +270,7 @@ static void nvmet_execute_disc_set_features(struct nvmet_req *req)
static void nvmet_execute_disc_get_features(struct nvmet_req *req)
{
u32 cdw10 = le32_to_cpu(req->cmd->common.cdw10[0]);
u32 cdw10 = le32_to_cpu(req->cmd->common.cdw10);
u16 stat = 0;
switch (cdw10 & 0xff) {
@ -279,6 +281,8 @@ static void nvmet_execute_disc_get_features(struct nvmet_req *req)
nvmet_get_feat_async_event(req);
break;
default:
req->error_loc =
offsetof(struct nvme_common_command, cdw10);
stat = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
break;
}
@ -293,6 +297,8 @@ u16 nvmet_parse_discovery_cmd(struct nvmet_req *req)
if (unlikely(!(req->sq->ctrl->csts & NVME_CSTS_RDY))) {
pr_err("got cmd %d while not ready\n",
cmd->common.opcode);
req->error_loc =
offsetof(struct nvme_common_command, opcode);
return NVME_SC_INVALID_OPCODE | NVME_SC_DNR;
}
@ -323,6 +329,8 @@ u16 nvmet_parse_discovery_cmd(struct nvmet_req *req)
default:
pr_err("unsupported get_log_page lid %d\n",
cmd->get_log_page.lid);
req->error_loc =
offsetof(struct nvme_get_log_page_command, lid);
return NVME_SC_INVALID_OPCODE | NVME_SC_DNR;
}
case nvme_admin_identify:
@ -335,10 +343,12 @@ u16 nvmet_parse_discovery_cmd(struct nvmet_req *req)
default:
pr_err("unsupported identify cns %d\n",
cmd->identify.cns);
req->error_loc = offsetof(struct nvme_identify, cns);
return NVME_SC_INVALID_OPCODE | NVME_SC_DNR;
}
default:
pr_err("unhandled cmd %d\n", cmd->common.opcode);
req->error_loc = offsetof(struct nvme_common_command, opcode);
return NVME_SC_INVALID_OPCODE | NVME_SC_DNR;
}

58
drivers/nvme/target/fabrics-cmd.c
View File

@ -17,23 +17,26 @@
static void nvmet_execute_prop_set(struct nvmet_req *req)
{
u64 val = le64_to_cpu(req->cmd->prop_set.value);
u16 status = 0;
if (!(req->cmd->prop_set.attrib & 1)) {
u64 val = le64_to_cpu(req->cmd->prop_set.value);
switch (le32_to_cpu(req->cmd->prop_set.offset)) {
case NVME_REG_CC:
nvmet_update_cc(req->sq->ctrl, val);
break;
default:
status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
break;
}
} else {
if (req->cmd->prop_set.attrib & 1) {
req->error_loc =
offsetof(struct nvmf_property_set_command, attrib);
status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
goto out;
}
switch (le32_to_cpu(req->cmd->prop_set.offset)) {
case NVME_REG_CC:
nvmet_update_cc(req->sq->ctrl, val);
break;
default:
req->error_loc =
offsetof(struct nvmf_property_set_command, offset);
status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
}
out:
nvmet_req_complete(req, status);
}
@ -69,6 +72,14 @@ static void nvmet_execute_prop_get(struct nvmet_req *req)
}
}
if (status && req->cmd->prop_get.attrib & 1) {
req->error_loc =
offsetof(struct nvmf_property_get_command, offset);
} else {
req->error_loc =
offsetof(struct nvmf_property_get_command, attrib);
}
req->rsp->result.u64 = cpu_to_le64(val);
nvmet_req_complete(req, status);
}
@ -89,6 +100,7 @@ u16 nvmet_parse_fabrics_cmd(struct nvmet_req *req)
default:
pr_err("received unknown capsule type 0x%x\n",
cmd->fabrics.fctype);
req->error_loc = offsetof(struct nvmf_common_command, fctype);
return NVME_SC_INVALID_OPCODE | NVME_SC_DNR;
}
@ -105,10 +117,12 @@ static u16 nvmet_install_queue(struct nvmet_ctrl *ctrl, struct nvmet_req *req)
old = cmpxchg(&req->sq->ctrl, NULL, ctrl);
if (old) {
pr_warn("queue already connected!\n");
req->error_loc = offsetof(struct nvmf_connect_command, opcode);
return NVME_SC_CONNECT_CTRL_BUSY | NVME_SC_DNR;
}
if (!sqsize) {
pr_warn("queue size zero!\n");
req->error_loc = offsetof(struct nvmf_connect_command, sqsize);
return NVME_SC_CONNECT_INVALID_PARAM | NVME_SC_DNR;
}
@ -121,6 +135,16 @@ static u16 nvmet_install_queue(struct nvmet_ctrl *ctrl, struct nvmet_req *req)
req->rsp->sq_head = cpu_to_le16(0xffff);
}
if (ctrl->ops->install_queue) {
u16 ret = ctrl->ops->install_queue(req->sq);
if (ret) {
pr_err("failed to install queue %d cntlid %d ret %x\n",
qid, ret, ctrl->cntlid);
return ret;
}
}
return 0;
}
@ -147,6 +171,7 @@ static void nvmet_execute_admin_connect(struct nvmet_req *req)
if (c->recfmt != 0) {
pr_warn("invalid connect version (%d).\n",
le16_to_cpu(c->recfmt));
req->error_loc = offsetof(struct nvmf_connect_command, recfmt);
status = NVME_SC_CONNECT_FORMAT | NVME_SC_DNR;
goto out;
}
@ -161,8 +186,13 @@ static void nvmet_execute_admin_connect(struct nvmet_req *req)
status = nvmet_alloc_ctrl(d->subsysnqn, d->hostnqn, req,
le32_to_cpu(c->kato), &ctrl);
if (status)
if (status) {
if (status == (NVME_SC_INVALID_FIELD | NVME_SC_DNR))
req->error_loc =
offsetof(struct nvme_common_command, opcode);
goto out;
}
uuid_copy(&ctrl->hostid, &d->hostid);
status = nvmet_install_queue(ctrl, req);
@ -249,11 +279,13 @@ u16 nvmet_parse_connect_cmd(struct nvmet_req *req)
if (cmd->common.opcode != nvme_fabrics_command) {
pr_err("invalid command 0x%x on unconnected queue.\n",
cmd->fabrics.opcode);
req->error_loc = offsetof(struct nvme_common_command, opcode);
return NVME_SC_INVALID_OPCODE | NVME_SC_DNR;
}
if (cmd->fabrics.fctype != nvme_fabrics_type_connect) {
pr_err("invalid capsule type 0x%x on unconnected queue.\n",
cmd->fabrics.fctype);
req->error_loc = offsetof(struct nvmf_common_command, fctype);
return NVME_SC_INVALID_OPCODE | NVME_SC_DNR;
}

87
drivers/nvme/target/io-cmd-bdev.c
View File

@ -44,13 +44,69 @@ void nvmet_bdev_ns_disable(struct nvmet_ns *ns)
}
}
static u16 blk_to_nvme_status(struct nvmet_req *req, blk_status_t blk_sts)
{
u16 status = NVME_SC_SUCCESS;
if (likely(blk_sts == BLK_STS_OK))
return status;
/*
* Right now there exists M : 1 mapping between block layer error
* to the NVMe status code (see nvme_error_status()). For consistency,
* when we reverse map we use most appropriate NVMe Status code from
* the group of the NVMe staus codes used in the nvme_error_status().
*/
switch (blk_sts) {
case BLK_STS_NOSPC:
status = NVME_SC_CAP_EXCEEDED | NVME_SC_DNR;
req->error_loc = offsetof(struct nvme_rw_command, length);
break;
case BLK_STS_TARGET:
status = NVME_SC_LBA_RANGE | NVME_SC_DNR;
req->error_loc = offsetof(struct nvme_rw_command, slba);
break;
case BLK_STS_NOTSUPP:
req->error_loc = offsetof(struct nvme_common_command, opcode);
switch (req->cmd->common.opcode) {
case nvme_cmd_dsm:
case nvme_cmd_write_zeroes:
status = NVME_SC_ONCS_NOT_SUPPORTED | NVME_SC_DNR;
break;
default:
status = NVME_SC_INVALID_OPCODE | NVME_SC_DNR;
}
break;
case BLK_STS_MEDIUM:
status = NVME_SC_ACCESS_DENIED;
req->error_loc = offsetof(struct nvme_rw_command, nsid);
break;
case BLK_STS_IOERR:
/* fallthru */
default:
status = NVME_SC_INTERNAL | NVME_SC_DNR;
req->error_loc = offsetof(struct nvme_common_command, opcode);
}
switch (req->cmd->common.opcode) {
case nvme_cmd_read:
case nvme_cmd_write:
req->error_slba = le64_to_cpu(req->cmd->rw.slba);
break;
case nvme_cmd_write_zeroes:
req->error_slba =
le64_to_cpu(req->cmd->write_zeroes.slba);
break;
default:
req->error_slba = 0;
}
return status;
}
static void nvmet_bio_done(struct bio *bio)
{
struct nvmet_req *req = bio->bi_private;
nvmet_req_complete(req,
bio->bi_status ? NVME_SC_INTERNAL | NVME_SC_DNR : 0);
nvmet_req_complete(req, blk_to_nvme_status(req, bio->bi_status));
if (bio != &req->b.inline_bio)
bio_put(bio);
}
@ -61,7 +117,6 @@ static void nvmet_bdev_execute_rw(struct nvmet_req *req)
struct bio *bio;
struct scatterlist *sg;
sector_t sector;
blk_qc_t cookie;
int op, op_flags = 0, i;
if (!req->sg_cnt) {
@ -114,7 +169,7 @@ static void nvmet_bdev_execute_rw(struct nvmet_req *req)
sg_cnt--;
}
cookie = submit_bio(bio);
submit_bio(bio);
}
static void nvmet_bdev_execute_flush(struct nvmet_req *req)
@ -137,18 +192,21 @@ u16 nvmet_bdev_flush(struct nvmet_req *req)
return 0;
}
static u16 nvmet_bdev_discard_range(struct nvmet_ns *ns,
static u16 nvmet_bdev_discard_range(struct nvmet_req *req,
struct nvme_dsm_range *range, struct bio **bio)
{
struct nvmet_ns *ns = req->ns;
int ret;
ret = __blkdev_issue_discard(ns->bdev,
le64_to_cpu(range->slba) << (ns->blksize_shift - 9),
le32_to_cpu(range->nlb) << (ns->blksize_shift - 9),
GFP_KERNEL, 0, bio);
if (ret && ret != -EOPNOTSUPP)
return NVME_SC_INTERNAL | NVME_SC_DNR;
return 0;
if (ret)
req->error_slba = le64_to_cpu(range->slba);
return blk_to_nvme_status(req, errno_to_blk_status(ret));
}
static void nvmet_bdev_execute_discard(struct nvmet_req *req)
@ -164,7 +222,7 @@ static void nvmet_bdev_execute_discard(struct nvmet_req *req)
if (status)
break;
status = nvmet_bdev_discard_range(req->ns, &range, &bio);
status = nvmet_bdev_discard_range(req, &range, &bio);
if (status)
break;
}
@ -205,16 +263,16 @@ static void nvmet_bdev_execute_write_zeroes(struct nvmet_req *req)
u16 status = NVME_SC_SUCCESS;
sector_t sector;
sector_t nr_sector;
int ret;
sector = le64_to_cpu(write_zeroes->slba) <<
(req->ns->blksize_shift - 9);
nr_sector = (((sector_t)le16_to_cpu(write_zeroes->length) + 1) <<
(req->ns->blksize_shift - 9));
if (__blkdev_issue_zeroout(req->ns->bdev, sector, nr_sector,
GFP_KERNEL, &bio, 0))
status = NVME_SC_INTERNAL | NVME_SC_DNR;
ret = __blkdev_issue_zeroout(req->ns->bdev, sector, nr_sector,
GFP_KERNEL, &bio, 0);
status = blk_to_nvme_status(req, errno_to_blk_status(ret));
if (bio) {
bio->bi_private = req;
bio->bi_end_io = nvmet_bio_done;
@ -249,6 +307,7 @@ u16 nvmet_bdev_parse_io_cmd(struct nvmet_req *req)
default:
pr_err("unhandled cmd %d on qid %d\n", cmd->common.opcode,
req->sq->qid);
req->error_loc = offsetof(struct nvme_common_command, opcode);
return NVME_SC_INVALID_OPCODE | NVME_SC_DNR;
}
}

35
drivers/nvme/target/io-cmd-file.c
View File

@ -112,6 +112,7 @@ static ssize_t nvmet_file_submit_bvec(struct nvmet_req *req, loff_t pos,
static void nvmet_file_io_done(struct kiocb *iocb, long ret, long ret2)
{
struct nvmet_req *req = container_of(iocb, struct nvmet_req, f.iocb);
u16 status = NVME_SC_SUCCESS;
if (req->f.bvec != req->inline_bvec) {
if (likely(req->f.mpool_alloc == false))
@ -120,8 +121,9 @@ static void nvmet_file_io_done(struct kiocb *iocb, long ret, long ret2)
mempool_free(req->f.bvec, req->ns->bvec_pool);
}
nvmet_req_complete(req, ret != req->data_len ?
NVME_SC_INTERNAL | NVME_SC_DNR : 0);
if (unlikely(ret != req->data_len))
status = errno_to_nvme_status(req, ret);
nvmet_req_complete(req, status);
}
static bool nvmet_file_execute_io(struct nvmet_req *req, int ki_flags)
@ -140,7 +142,7 @@ static bool nvmet_file_execute_io(struct nvmet_req *req, int ki_flags)
pos = le64_to_cpu(req->cmd->rw.slba) << req->ns->blksize_shift;
if (unlikely(pos + req->data_len > req->ns->size)) {
nvmet_req_complete(req, NVME_SC_LBA_RANGE | NVME_SC_DNR);
nvmet_req_complete(req, errno_to_nvme_status(req, -ENOSPC));
return true;
}
@ -254,9 +256,7 @@ static void nvmet_file_execute_rw(struct nvmet_req *req)
u16 nvmet_file_flush(struct nvmet_req *req)
{
if (vfs_fsync(req->ns->file, 1) < 0)
return NVME_SC_INTERNAL | NVME_SC_DNR;
return 0;
return errno_to_nvme_status(req, vfs_fsync(req->ns->file, 1));
}
static void nvmet_file_flush_work(struct work_struct *w)
@ -277,30 +277,34 @@ static void nvmet_file_execute_discard(struct nvmet_req *req)
int mode = FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE;
struct nvme_dsm_range range;
loff_t offset, len;
u16 ret;
u16 status = 0;
int ret;
int i;
for (i = 0; i <= le32_to_cpu(req->cmd->dsm.nr); i++) {
ret = nvmet_copy_from_sgl(req, i * sizeof(range), &range,
status = nvmet_copy_from_sgl(req, i * sizeof(range), &range,
sizeof(range));
if (ret)
if (status)
break;
offset = le64_to_cpu(range.slba) << req->ns->blksize_shift;
len = le32_to_cpu(range.nlb);
len <<= req->ns->blksize_shift;
if (offset + len > req->ns->size) {
ret = NVME_SC_LBA_RANGE | NVME_SC_DNR;
req->error_slba = le64_to_cpu(range.slba);
status = errno_to_nvme_status(req, -ENOSPC);
break;
}
if (vfs_fallocate(req->ns->file, mode, offset, len)) {
ret = NVME_SC_INTERNAL | NVME_SC_DNR;
ret = vfs_fallocate(req->ns->file, mode, offset, len);
if (ret) {
req->error_slba = le64_to_cpu(range.slba);
status = errno_to_nvme_status(req, ret);
break;
}
}
nvmet_req_complete(req, ret);
nvmet_req_complete(req, status);
}
static void nvmet_file_dsm_work(struct work_struct *w)
@ -340,12 +344,12 @@ static void nvmet_file_write_zeroes_work(struct work_struct *w)
req->ns->blksize_shift);
if (unlikely(offset + len > req->ns->size)) {
nvmet_req_complete(req, NVME_SC_LBA_RANGE | NVME_SC_DNR);
nvmet_req_complete(req, errno_to_nvme_status(req, -ENOSPC));
return;
}
ret = vfs_fallocate(req->ns->file, mode, offset, len);
nvmet_req_complete(req, ret < 0 ? NVME_SC_INTERNAL | NVME_SC_DNR : 0);
nvmet_req_complete(req, ret < 0 ? errno_to_nvme_status(req, ret) : 0);
}
static void nvmet_file_execute_write_zeroes(struct nvmet_req *req)
@ -380,6 +384,7 @@ u16 nvmet_file_parse_io_cmd(struct nvmet_req *req)
default:
pr_err("unhandled cmd for file ns %d on qid %d\n",
cmd->common.opcode, req->sq->qid);
req->error_loc = offsetof(struct nvme_common_command, opcode);
return NVME_SC_INVALID_OPCODE | NVME_SC_DNR;
}
}

16
drivers/nvme/target/nvmet.h
View File

@ -202,6 +202,10 @@ struct nvmet_ctrl {
struct device *p2p_client;
struct radix_tree_root p2p_ns_map;
spinlock_t error_lock;
u64 err_counter;
struct nvme_error_slot slots[NVMET_ERROR_LOG_SLOTS];
};
struct nvmet_subsys {
@ -279,6 +283,7 @@ struct nvmet_fabrics_ops {
void (*delete_ctrl)(struct nvmet_ctrl *ctrl);
void (*disc_traddr)(struct nvmet_req *req,
struct nvmet_port *port, char *traddr);
u16 (*install_queue)(struct nvmet_sq *nvme_sq);
};
#define NVMET_MAX_INLINE_BIOVEC 8
@ -316,15 +321,12 @@ struct nvmet_req {
struct pci_dev *p2p_dev;
struct device *p2p_client;
u16 error_loc;
u64 error_slba;
};
extern struct workqueue_struct *buffered_io_wq;
static inline void nvmet_set_status(struct nvmet_req *req, u16 status)
{
req->rsp->status = cpu_to_le16(status << 1);
}
static inline void nvmet_set_result(struct nvmet_req *req, u32 result)
{
req->rsp->result.u32 = cpu_to_le32(result);
@ -348,7 +350,7 @@ struct nvmet_async_event {
static inline void nvmet_clear_aen_bit(struct nvmet_req *req, u32 bn)
{
int rae = le32_to_cpu(req->cmd->common.cdw10[0]) & 1 << 15;
int rae = le32_to_cpu(req->cmd->common.cdw10) & 1 << 15;
if (!rae)
clear_bit(bn, &req->sq->ctrl->aen_masked);
@ -492,4 +494,6 @@ static inline u32 nvmet_rw_len(struct nvmet_req *req)
return ((u32)le16_to_cpu(req->cmd->rw.length) + 1) <<
req->ns->blksize_shift;
}
u16 errno_to_nvme_status(struct nvmet_req *req, int errno);
#endif /* _NVMET_H */

10
drivers/nvme/target/rdma.c
View File

@ -630,8 +630,11 @@ static u16 nvmet_rdma_map_sgl_inline(struct nvmet_rdma_rsp *rsp)
u64 off = le64_to_cpu(sgl->addr);
u32 len = le32_to_cpu(sgl->length);
if (!nvme_is_write(rsp->req.cmd))
if (!nvme_is_write(rsp->req.cmd)) {
rsp->req.error_loc =
offsetof(struct nvme_common_command, opcode);
return NVME_SC_INVALID_FIELD | NVME_SC_DNR;
}
if (off + len > rsp->queue->dev->inline_data_size) {
pr_err("invalid inline data offset!\n");
@ -696,6 +699,8 @@ static u16 nvmet_rdma_map_sgl(struct nvmet_rdma_rsp *rsp)
return nvmet_rdma_map_sgl_inline(rsp);
default:
pr_err("invalid SGL subtype: %#x\n", sgl->type);
rsp->req.error_loc =
offsetof(struct nvme_common_command, dptr);
return NVME_SC_INVALID_FIELD | NVME_SC_DNR;
}
case NVME_KEY_SGL_FMT_DATA_DESC:
@ -706,10 +711,13 @@ static u16 nvmet_rdma_map_sgl(struct nvmet_rdma_rsp *rsp)
return nvmet_rdma_map_sgl_keyed(rsp, sgl, false);
default:
pr_err("invalid SGL subtype: %#x\n", sgl->type);
rsp->req.error_loc =
offsetof(struct nvme_common_command, dptr);
return NVME_SC_INVALID_FIELD | NVME_SC_DNR;
}
default:
pr_err("invalid SGL type: %#x\n", sgl->type);
rsp->req.error_loc = offsetof(struct nvme_common_command, dptr);
return NVME_SC_SGL_INVALID_TYPE | NVME_SC_DNR;
}
}

1737
drivers/nvme/target/tcp.c Normal file
View File

File diff suppressed because it is too large Load Diff

2
include/linux/blk-mq-rdma.h
View File

@ -4,7 +4,7 @@
struct blk_mq_tag_set;
struct ib_device;
int blk_mq_rdma_map_queues(struct blk_mq_tag_set *set,
int blk_mq_rdma_map_queues(struct blk_mq_queue_map *map,
struct ib_device *dev, int first_vec);
#endif /* _LINUX_BLK_MQ_RDMA_H */

189
include/linux/nvme-tcp.h Normal file
View File

@ -0,0 +1,189 @@
// SPDX-License-Identifier: GPL-2.0
/*
* NVMe over Fabrics TCP protocol header.
* Copyright (c) 2018 Lightbits Labs. All rights reserved.
*/
#ifndef _LINUX_NVME_TCP_H
#define _LINUX_NVME_TCP_H
#include <linux/nvme.h>
#define NVME_TCP_DISC_PORT 8009
#define NVME_TCP_ADMIN_CCSZ SZ_8K
#define NVME_TCP_DIGEST_LENGTH 4
enum nvme_tcp_pfv {
NVME_TCP_PFV_1_0 = 0x0,
};
enum nvme_tcp_fatal_error_status {
NVME_TCP_FES_INVALID_PDU_HDR = 0x01,
NVME_TCP_FES_PDU_SEQ_ERR = 0x02,
NVME_TCP_FES_HDR_DIGEST_ERR = 0x03,
NVME_TCP_FES_DATA_OUT_OF_RANGE = 0x04,
NVME_TCP_FES_R2T_LIMIT_EXCEEDED = 0x05,
NVME_TCP_FES_DATA_LIMIT_EXCEEDED = 0x05,
NVME_TCP_FES_UNSUPPORTED_PARAM = 0x06,
};
enum nvme_tcp_digest_option {
NVME_TCP_HDR_DIGEST_ENABLE = (1 << 0),
NVME_TCP_DATA_DIGEST_ENABLE = (1 << 1),
};
enum nvme_tcp_pdu_type {
nvme_tcp_icreq = 0x0,
nvme_tcp_icresp = 0x1,
nvme_tcp_h2c_term = 0x2,
nvme_tcp_c2h_term = 0x3,
nvme_tcp_cmd = 0x4,
nvme_tcp_rsp = 0x5,
nvme_tcp_h2c_data = 0x6,
nvme_tcp_c2h_data = 0x7,
nvme_tcp_r2t = 0x9,
};
enum nvme_tcp_pdu_flags {
NVME_TCP_F_HDGST = (1 << 0),
NVME_TCP_F_DDGST = (1 << 1),
NVME_TCP_F_DATA_LAST = (1 << 2),
NVME_TCP_F_DATA_SUCCESS = (1 << 3),
};
/**
* struct nvme_tcp_hdr - nvme tcp pdu common header
*
* @type: pdu type
* @flags: pdu specific flags
* @hlen: pdu header length
* @pdo: pdu data offset
* @plen: pdu wire byte length
*/
struct nvme_tcp_hdr {
__u8 type;
__u8 flags;
__u8 hlen;
__u8 pdo;
__le32 plen;
};
/**
* struct nvme_tcp_icreq_pdu - nvme tcp initialize connection request pdu
*
* @hdr: pdu generic header
* @pfv: pdu version format
* @hpda: host pdu data alignment (dwords, 0's based)
* @digest: digest types enabled
* @maxr2t: maximum r2ts per request supported
*/
struct nvme_tcp_icreq_pdu {
struct nvme_tcp_hdr hdr;
__le16 pfv;
__u8 hpda;
__u8 digest;
__le32 maxr2t;
__u8 rsvd2[112];
};
/**
* struct nvme_tcp_icresp_pdu - nvme tcp initialize connection response pdu
*
* @hdr: pdu common header
* @pfv: pdu version format
* @cpda: controller pdu data alignment (dowrds, 0's based)
* @digest: digest types enabled
* @maxdata: maximum data capsules per r2t supported
*/
struct nvme_tcp_icresp_pdu {
struct nvme_tcp_hdr hdr;
__le16 pfv;
__u8 cpda;
__u8 digest;
__le32 maxdata;
__u8 rsvd[112];
};
/**
* struct nvme_tcp_term_pdu - nvme tcp terminate connection pdu
*
* @hdr: pdu common header
* @fes: fatal error status
* @fei: fatal error information
*/
struct nvme_tcp_term_pdu {
struct nvme_tcp_hdr hdr;
__le16 fes;
__le32 fei;
__u8 rsvd[8];
};
/**
* struct nvme_tcp_cmd_pdu - nvme tcp command capsule pdu
*
* @hdr: pdu common header
* @cmd: nvme command
*/
struct nvme_tcp_cmd_pdu {
struct nvme_tcp_hdr hdr;
struct nvme_command cmd;
};
/**
* struct nvme_tcp_rsp_pdu - nvme tcp response capsule pdu
*
* @hdr: pdu common header
* @hdr: nvme-tcp generic header
* @cqe: nvme completion queue entry
*/
struct nvme_tcp_rsp_pdu {
struct nvme_tcp_hdr hdr;
struct nvme_completion cqe;
};
/**
* struct nvme_tcp_r2t_pdu - nvme tcp ready-to-transfer pdu
*
* @hdr: pdu common header
* @command_id: nvme command identifier which this relates to
* @ttag: transfer tag (controller generated)
* @r2t_offset: offset from the start of the command data
* @r2t_length: length the host is allowed to send
*/
struct nvme_tcp_r2t_pdu {
struct nvme_tcp_hdr hdr;
__u16 command_id;
__u16 ttag;
__le32 r2t_offset;
__le32 r2t_length;
__u8 rsvd[4];
};
/**
* struct nvme_tcp_data_pdu - nvme tcp data pdu
*
* @hdr: pdu common header
* @command_id: nvme command identifier which this relates to
* @ttag: transfer tag (controller generated)
* @data_offset: offset from the start of the command data
* @data_length: length of the data stream
*/
struct nvme_tcp_data_pdu {
struct nvme_tcp_hdr hdr;
__u16 command_id;
__u16 ttag;
__le32 data_offset;
__le32 data_length;
__u8 rsvd[4];
};
union nvme_tcp_pdu {
struct nvme_tcp_icreq_pdu icreq;
struct nvme_tcp_icresp_pdu icresp;
struct nvme_tcp_cmd_pdu cmd;
struct nvme_tcp_rsp_pdu rsp;
struct nvme_tcp_r2t_pdu r2t;
struct nvme_tcp_data_pdu data;
};
#endif /* _LINUX_NVME_TCP_H */

22
include/linux/nvme.h
View File

@ -52,6 +52,7 @@ enum {
enum {
NVMF_TRTYPE_RDMA = 1, /* RDMA */
NVMF_TRTYPE_FC = 2, /* Fibre Channel */
NVMF_TRTYPE_TCP = 3, /* TCP/IP */
NVMF_TRTYPE_LOOP = 254, /* Reserved for host usage */
NVMF_TRTYPE_MAX,
};
@ -661,7 +662,12 @@ struct nvme_common_command {
__le32 cdw2[2];
__le64 metadata;
union nvme_data_ptr dptr;
__le32 cdw10[6];
__le32 cdw10;
__le32 cdw11;
__le32 cdw12;
__le32 cdw13;
__le32 cdw14;
__le32 cdw15;
};
struct nvme_rw_command {
@ -1162,6 +1168,20 @@ struct nvme_command {
};
};
struct nvme_error_slot {
__le64 error_count;
__le16 sqid;
__le16 cmdid;
__le16 status_field;
__le16 param_error_location;
__le64 lba;
__le32 nsid;
__u8 vs;
__u8 resv[3];
__le64 cs;
__u8 resv2[24];
};
static inline bool nvme_is_write(struct nvme_command *cmd)
{
/*

3
include/linux/skbuff.h
View File

@ -3325,6 +3325,9 @@ static inline int skb_copy_datagram_msg(const struct sk_buff *from, int offset,
}
int skb_copy_and_csum_datagram_msg(struct sk_buff *skb, int hlen,
struct msghdr *msg);
int skb_copy_and_hash_datagram_iter(const struct sk_buff *skb, int offset,
struct iov_iter *to, int len,
struct ahash_request *hash);
int skb_copy_datagram_from_iter(struct sk_buff *skb, int offset,
struct iov_iter *from, int len);
int zerocopy_sg_from_iter(struct sk_buff *skb, struct iov_iter *frm);

5
include/linux/uio.h
View File

@ -11,6 +11,7 @@
#include <linux/kernel.h>
#include <linux/thread_info.h>
#include <crypto/hash.h>
#include <uapi/linux/uio.h>
struct page;
@ -266,9 +267,11 @@ static inline void iov_iter_reexpand(struct iov_iter *i, size_t count)
{
i->count = count;
}
size_t csum_and_copy_to_iter(const void *addr, size_t bytes, __wsum *csum, struct iov_iter *i);
size_t csum_and_copy_to_iter(const void *addr, size_t bytes, void *csump, struct iov_iter *i);
size_t csum_and_copy_from_iter(void *addr, size_t bytes, __wsum *csum, struct iov_iter *i);
bool csum_and_copy_from_iter_full(void *addr, size_t bytes, __wsum *csum, struct iov_iter *i);
size_t hash_and_copy_to_iter(const void *addr, size_t bytes, void *hashp,
struct iov_iter *i);
int import_iovec(int type, const struct iovec __user * uvector,
unsigned nr_segs, unsigned fast_segs,

19
lib/iov_iter.c
View File

@ -6,6 +6,7 @@
#include <linux/vmalloc.h>
#include <linux/splice.h>
#include <net/checksum.h>
#include <linux/scatterlist.h>
#define PIPE_PARANOIA /* for now */
@ -1464,10 +1465,11 @@ bool csum_and_copy_from_iter_full(void *addr, size_t bytes, __wsum *csum,
}
EXPORT_SYMBOL(csum_and_copy_from_iter_full);
size_t csum_and_copy_to_iter(const void *addr, size_t bytes, __wsum *csum,
size_t csum_and_copy_to_iter(const void *addr, size_t bytes, void *csump,
struct iov_iter *i)
{
const char *from = addr;
__wsum *csum = csump;
__wsum sum, next;
size_t off = 0;
@ -1510,6 +1512,21 @@ size_t csum_and_copy_to_iter(const void *addr, size_t bytes, __wsum *csum,
}
EXPORT_SYMBOL(csum_and_copy_to_iter);
size_t hash_and_copy_to_iter(const void *addr, size_t bytes, void *hashp,
struct iov_iter *i)
{
struct ahash_request *hash = hashp;
struct scatterlist sg;
size_t copied;
copied = copy_to_iter(addr, bytes, i);
sg_init_one(&sg, addr, copied);
ahash_request_set_crypt(hash, &sg, NULL, copied);
crypto_ahash_update(hash);
return copied;
}
EXPORT_SYMBOL(hash_and_copy_to_iter);
int iov_iter_npages(const struct iov_iter *i, int maxpages)
{
size_t size = i->count;

159
net/core/datagram.c
View File

@ -408,27 +408,20 @@ int skb_kill_datagram(struct sock *sk, struct sk_buff *skb, unsigned int flags)
}
EXPORT_SYMBOL(skb_kill_datagram);
/**
* skb_copy_datagram_iter - Copy a datagram to an iovec iterator.
* @skb: buffer to copy
* @offset: offset in the buffer to start copying from
* @to: iovec iterator to copy to
* @len: amount of data to copy from buffer to iovec
*/
int skb_copy_datagram_iter(const struct sk_buff *skb, int offset,
struct iov_iter *to, int len)
int __skb_datagram_iter(const struct sk_buff *skb, int offset,
struct iov_iter *to, int len, bool fault_short,
size_t (*cb)(const void *, size_t, void *, struct iov_iter *),
void *data)
{
int start = skb_headlen(skb);
int i, copy = start - offset, start_off = offset, n;
struct sk_buff *frag_iter;
trace_skb_copy_datagram_iovec(skb, len);
/* Copy header. */
if (copy > 0) {
if (copy > len)
copy = len;
n = copy_to_iter(skb->data + offset, copy, to);
n = cb(skb->data + offset, copy, data, to);
offset += n;
if (n != copy)
goto short_copy;
@ -445,11 +438,14 @@ int skb_copy_datagram_iter(const struct sk_buff *skb, int offset,
end = start + skb_frag_size(frag);
if ((copy = end - offset) > 0) {
struct page *page = skb_frag_page(frag);
u8 *vaddr = kmap(page);
if (copy > len)
copy = len;
n = copy_page_to_iter(skb_frag_page(frag),
frag->page_offset + offset -
start, copy, to);
n = cb(vaddr + frag->page_offset +
offset - start, copy, data, to);
kunmap(page);
offset += n;
if (n != copy)
goto short_copy;
@ -468,8 +464,8 @@ int skb_copy_datagram_iter(const struct sk_buff *skb, int offset,
if ((copy = end - offset) > 0) {
if (copy > len)
copy = len;
if (skb_copy_datagram_iter(frag_iter, offset - start,
to, copy))
if (__skb_datagram_iter(frag_iter, offset - start,
to, copy, fault_short, cb, data))
goto fault;
if ((len -= copy) == 0)
return 0;
@ -490,11 +486,50 @@ int skb_copy_datagram_iter(const struct sk_buff *skb, int offset,
return -EFAULT;
short_copy:
if (iov_iter_count(to))
if (fault_short || iov_iter_count(to))
goto fault;
return 0;
}
/**
* skb_copy_and_hash_datagram_iter - Copy datagram to an iovec iterator
* and update a hash.
* @skb: buffer to copy
* @offset: offset in the buffer to start copying from
* @to: iovec iterator to copy to
* @len: amount of data to copy from buffer to iovec
* @hash: hash request to update
*/
int skb_copy_and_hash_datagram_iter(const struct sk_buff *skb, int offset,
struct iov_iter *to, int len,
struct ahash_request *hash)
{
return __skb_datagram_iter(skb, offset, to, len, true,
hash_and_copy_to_iter, hash);
}
EXPORT_SYMBOL(skb_copy_and_hash_datagram_iter);
static size_t simple_copy_to_iter(const void *addr, size_t bytes,
void *data __always_unused, struct iov_iter *i)
{
return copy_to_iter(addr, bytes, i);
}
/**
* skb_copy_datagram_iter - Copy a datagram to an iovec iterator.
* @skb: buffer to copy
* @offset: offset in the buffer to start copying from
* @to: iovec iterator to copy to
* @len: amount of data to copy from buffer to iovec
*/
int skb_copy_datagram_iter(const struct sk_buff *skb, int offset,
struct iov_iter *to, int len)
{
trace_skb_copy_datagram_iovec(skb, len);
return __skb_datagram_iter(skb, offset, to, len, false,
simple_copy_to_iter, NULL);
}
EXPORT_SYMBOL(skb_copy_datagram_iter);
/**
@ -645,87 +680,21 @@ int zerocopy_sg_from_iter(struct sk_buff *skb, struct iov_iter *from)
}
EXPORT_SYMBOL(zerocopy_sg_from_iter);
/**
* skb_copy_and_csum_datagram_iter - Copy datagram to an iovec iterator
* and update a checksum.
* @skb: buffer to copy
* @offset: offset in the buffer to start copying from
* @to: iovec iterator to copy to
* @len: amount of data to copy from buffer to iovec
* @csump: checksum pointer
*/
static int skb_copy_and_csum_datagram(const struct sk_buff *skb, int offset,
struct iov_iter *to, int len,
__wsum *csump)
{
int start = skb_headlen(skb);
int i, copy = start - offset, start_off = offset;
struct sk_buff *frag_iter;
int pos = 0;
int n;
/* Copy header. */
if (copy > 0) {
if (copy > len)
copy = len;
n = csum_and_copy_to_iter(skb->data + offset, copy, csump, to);
offset += n;
if (n != copy)
goto fault;
if ((len -= copy) == 0)
return 0;
pos = copy;
}
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
int end;
const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
WARN_ON(start > offset + len);
end = start + skb_frag_size(frag);
if ((copy = end - offset) > 0) {
__wsum csum2 = 0;
struct page *page = skb_frag_page(frag);
u8 *vaddr = kmap(page);
if (copy > len)
copy = len;
n = csum_and_copy_to_iter(vaddr + frag->page_offset +
offset - start, copy,
&csum2, to);
kunmap(page);
offset += n;
if (n != copy)
goto fault;
*csump = csum_block_add(*csump, csum2, pos);
if (!(len -= copy))
return 0;
pos += copy;
}
start = end;
}
skb_walk_frags(skb, frag_iter) {
int end;
WARN_ON(start > offset + len);
end = start + frag_iter->len;
if ((copy = end - offset) > 0) {
__wsum csum2 = 0;
if (copy > len)
copy = len;
if (skb_copy_and_csum_datagram(frag_iter,
offset - start,
to, copy,
&csum2))
goto fault;
*csump = csum_block_add(*csump, csum2, pos);
if ((len -= copy) == 0)
return 0;
offset += copy;
pos += copy;
}
start = end;
}
if (!len)
return 0;
fault:
iov_iter_revert(to, offset - start_off);
return -EFAULT;
return __skb_datagram_iter(skb, offset, to, len, true,
csum_and_copy_to_iter, csump);
}
__sum16 __skb_checksum_complete_head(struct sk_buff *skb, int len)