From: Roman Pen <roman.penyaev@profitbricks.com>
To: linux-block@vger.kernel.org, linux-rdma@vger.kernel.org
Cc: Jens Axboe <axboe@kernel.dk>,
Christoph Hellwig <hch@infradead.org>,
Sagi Grimberg <sagi@grimberg.me>,
Bart Van Assche <bart.vanassche@sandisk.com>,
Or Gerlitz <ogerlitz@mellanox.com>,
Doug Ledford <dledford@redhat.com>,
Swapnil Ingle <swapnil.ingle@profitbricks.com>,
Danil Kipnis <danil.kipnis@profitbricks.com>,
Jack Wang <jinpu.wang@profitbricks.com>,
Roman Pen <roman.penyaev@profitbricks.com>
Subject: [PATCH v2 16/26] ibnbd: private headers with IBNBD protocol structs and helpers
Date: Fri, 18 May 2018 15:04:03 +0200 [thread overview]
Message-ID: <20180518130413.16997-17-roman.penyaev@profitbricks.com> (raw)
In-Reply-To: <20180518130413.16997-1-roman.penyaev@profitbricks.com>
These are common private headers with IBNBD protocol structures,
logging, sysfs and other helper functions, which are used on
both client and server sides.
Signed-off-by: Roman Pen <roman.penyaev@profitbricks.com>
Signed-off-by: Danil Kipnis <danil.kipnis@profitbricks.com>
Cc: Jack Wang <jinpu.wang@profitbricks.com>
---
drivers/block/ibnbd/ibnbd-log.h | 71 ++++++++
drivers/block/ibnbd/ibnbd-proto.h | 364 ++++++++++++++++++++++++++++++++++++++
2 files changed, 435 insertions(+)
create mode 100644 drivers/block/ibnbd/ibnbd-log.h
create mode 100644 drivers/block/ibnbd/ibnbd-proto.h
diff --git a/drivers/block/ibnbd/ibnbd-log.h b/drivers/block/ibnbd/ibnbd-log.h
new file mode 100644
index 000000000000..489343a61171
--- /dev/null
+++ b/drivers/block/ibnbd/ibnbd-log.h
@@ -0,0 +1,71 @@
+/*
+ * InfiniBand Network Block Driver
+ *
+ * Copyright (c) 2014 - 2017 ProfitBricks GmbH. All rights reserved.
+ * Authors: Fabian Holler <mail@fholler.de>
+ * Jack Wang <jinpu.wang@profitbricks.com>
+ * Kleber Souza <kleber.souza@profitbricks.com>
+ * Danil Kipnis <danil.kipnis@profitbricks.com>
+ * Roman Penyaev <roman.penyaev@profitbricks.com>
+ * Milind Dumbare <Milind.dumbare@gmail.com>
+ *
+ * Copyright (c) 2017 - 2018 ProfitBricks GmbH. All rights reserved.
+ * Authors: Danil Kipnis <danil.kipnis@profitbricks.com>
+ * Roman Penyaev <roman.penyaev@profitbricks.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef IBNBD_LOG_H
+#define IBNBD_LOG_H
+
+#include "ibnbd-clt.h"
+#include "ibnbd-srv.h"
+
+#define ibnbd_diskname(dev) ({ \
+ struct gendisk *gd = ((struct ibnbd_clt_dev *)dev)->gd; \
+ gd ? gd->disk_name : "<no dev>"; \
+})
+
+void unknown_type(void);
+
+#define ibnbd_log(fn, dev, fmt, ...) ({ \
+ __builtin_choose_expr( \
+ __builtin_types_compatible_p( \
+ typeof(dev), struct ibnbd_clt_dev *), \
+ fn("<%s@%s> %s: " fmt, (dev)->pathname, \
+ (dev)->sess->sessname, ibnbd_diskname(dev), \
+ ##__VA_ARGS__), \
+ __builtin_choose_expr( \
+ __builtin_types_compatible_p(typeof(dev), \
+ struct ibnbd_srv_sess_dev *), \
+ fn("<%s@%s>: " fmt, (dev)->pathname, \
+ (dev)->sess->sessname, ##__VA_ARGS__), \
+ unknown_type())); \
+})
+
+#define ibnbd_err(dev, fmt, ...) \
+ ibnbd_log(pr_err, dev, fmt, ##__VA_ARGS__)
+#define ibnbd_err_rl(dev, fmt, ...) \
+ ibnbd_log(pr_err_ratelimited, dev, fmt, ##__VA_ARGS__)
+#define ibnbd_wrn(dev, fmt, ...) \
+ ibnbd_log(pr_warn, dev, fmt, ##__VA_ARGS__)
+#define ibnbd_wrn_rl(dev, fmt, ...) \
+ ibnbd_log(pr_warn_ratelimited, dev, fmt, ##__VA_ARGS__)
+#define ibnbd_info(dev, fmt, ...) \
+ ibnbd_log(pr_info, dev, fmt, ##__VA_ARGS__)
+#define ibnbd_info_rl(dev, fmt, ...) \
+ ibnbd_log(pr_info_ratelimited, dev, fmt, ##__VA_ARGS__)
+
+#endif /* IBNBD_LOG_H */
diff --git a/drivers/block/ibnbd/ibnbd-proto.h b/drivers/block/ibnbd/ibnbd-proto.h
new file mode 100644
index 000000000000..050d3fa4c1bf
--- /dev/null
+++ b/drivers/block/ibnbd/ibnbd-proto.h
@@ -0,0 +1,364 @@
+/*
+ * InfiniBand Network Block Driver
+ *
+ * Copyright (c) 2014 - 2017 ProfitBricks GmbH. All rights reserved.
+ * Authors: Fabian Holler <mail@fholler.de>
+ * Jack Wang <jinpu.wang@profitbricks.com>
+ * Kleber Souza <kleber.souza@profitbricks.com>
+ * Danil Kipnis <danil.kipnis@profitbricks.com>
+ * Roman Penyaev <roman.penyaev@profitbricks.com>
+ * Milind Dumbare <Milind.dumbare@gmail.com>
+ *
+ * Copyright (c) 2017 - 2018 ProfitBricks GmbH. All rights reserved.
+ * Authors: Danil Kipnis <danil.kipnis@profitbricks.com>
+ * Roman Penyaev <roman.penyaev@profitbricks.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef IBNBD_PROTO_H
+#define IBNBD_PROTO_H
+
+#include <linux/types.h>
+#include <linux/blkdev.h>
+#include <linux/limits.h>
+#include <linux/inet.h>
+#include <linux/in.h>
+#include <linux/in6.h>
+#include <rdma/ib.h>
+
+#define IBNBD_PROTO_VER_MAJOR 1
+#define IBNBD_PROTO_VER_MINOR 0
+
+#define IBNBD_PROTO_VER_STRING __stringify(IBNBD_PROTO_VER_MAJOR) "." \
+ __stringify(IBNBD_PROTO_VER_MINOR)
+
+#ifndef IBNBD_VER_STRING
+#define IBNBD_VER_STRING __stringify(IBNBD_PROTO_VER_MAJOR) "." \
+ __stringify(IBNBD_PROTO_VER_MINOR)
+#endif
+
+/* TODO: should be configurable */
+#define IBTRS_PORT 1234
+
+/**
+ * enum ibnbd_msg_types - IBNBD message types
+ * @IBNBD_MSG_SESS_INFO: initial session info from client to server
+ * @IBNBD_MSG_SESS_INFO_RSP: initial session info from server to client
+ * @IBNBD_MSG_OPEN: open (map) device request
+ * @IBNBD_MSG_OPEN_RSP: response to an @IBNBD_MSG_OPEN
+ * @IBNBD_MSG_IO: block IO request operation
+ * @IBNBD_MSG_CLOSE: close (unmap) device request
+ */
+enum ibnbd_msg_type {
+ IBNBD_MSG_SESS_INFO,
+ IBNBD_MSG_SESS_INFO_RSP,
+ IBNBD_MSG_OPEN,
+ IBNBD_MSG_OPEN_RSP,
+ IBNBD_MSG_IO,
+ IBNBD_MSG_CLOSE,
+};
+
+/**
+ * struct ibnbd_msg_hdr - header of IBNBD messages
+ * @type: Message type, valid values see: enum ibnbd_msg_types
+ */
+struct ibnbd_msg_hdr {
+ __le16 type;
+ __le16 __padding;
+};
+
+enum ibnbd_access_mode {
+ IBNBD_ACCESS_RO,
+ IBNBD_ACCESS_RW,
+ IBNBD_ACCESS_MIGRATION,
+};
+
+#define _IBNBD_FILEIO 0
+#define _IBNBD_BLOCKIO 1
+#define _IBNBD_AUTOIO 2
+
+enum ibnbd_io_mode {
+ IBNBD_FILEIO = _IBNBD_FILEIO,
+ IBNBD_BLOCKIO = _IBNBD_BLOCKIO,
+ IBNBD_AUTOIO = _IBNBD_AUTOIO,
+};
+
+/**
+ * struct ibnbd_msg_sess_info - initial session info from client to server
+ * @hdr: message header
+ * @ver: IBNBD protocol version
+ */
+struct ibnbd_msg_sess_info {
+ struct ibnbd_msg_hdr hdr;
+ u8 ver;
+ u8 reserved[31];
+};
+
+/**
+ * struct ibnbd_msg_sess_info_rsp - initial session info from server to client
+ * @hdr: message header
+ * @ver: IBNBD protocol version
+ */
+struct ibnbd_msg_sess_info_rsp {
+ struct ibnbd_msg_hdr hdr;
+ u8 ver;
+ u8 reserved[31];
+};
+
+/**
+ * struct ibnbd_msg_open - request to open a remote device.
+ * @hdr: message header
+ * @access_mode: the mode to open remote device, valid values see:
+ * enum ibnbd_access_mode
+ * @io_mode: Open volume on server as block device or as file
+ * @device_name: device path on remote side
+ */
+struct ibnbd_msg_open {
+ struct ibnbd_msg_hdr hdr;
+ u8 access_mode;
+ u8 io_mode;
+ s8 dev_name[NAME_MAX];
+ u8 __padding[3];
+};
+
+/**
+ * struct ibnbd_msg_close - request to close a remote device.
+ * @hdr: message header
+ * @device_id: device_id on server side to identify the device
+ */
+struct ibnbd_msg_close {
+ struct ibnbd_msg_hdr hdr;
+ __le32 device_id;
+};
+
+/**
+ * struct ibnbd_msg_open_rsp - response message to IBNBD_MSG_OPEN
+ * @hdr: message header
+ * @nsectors: number of sectors
+ * @device_id: device_id on server side to identify the device
+ * @queue_flags: queue_flags of the device on server side
+ * @max_hw_sectors: max hardware sectors in the usual 512b unit
+ * @max_write_same_sectors: max sectors for WRITE SAME in the 512b unit
+ * @max_discard_sectors: max. sectors that can be discarded at once
+ * @discard_granularity: size of the internal discard allocation unit
+ * @discard_alignment: offset from internal allocation assignment
+ * @physical_block_size: physical block size device supports
+ * @logical_block_size: logical block size device supports
+ * @max_segments: max segments hardware support in one transfer
+ * @secure_discard: supports secure discard
+ * @rotation: is a rotational disc?
+ * @io_mode: io_mode device is opened.
+ */
+struct ibnbd_msg_open_rsp {
+ struct ibnbd_msg_hdr hdr;
+ __le32 device_id;
+ __le64 nsectors;
+ __le32 max_hw_sectors;
+ __le32 max_write_same_sectors;
+ __le32 max_discard_sectors;
+ __le32 discard_granularity;
+ __le32 discard_alignment;
+ __le16 physical_block_size;
+ __le16 logical_block_size;
+ __le16 max_segments;
+ __le16 secure_discard;
+ u8 rotational;
+ u8 io_mode;
+ u8 __padding[10];
+};
+
+/**
+ * struct ibnbd_msg_io - message for I/O read/write
+ * @hdr: message header
+ * @device_id: device_id on server side to find the right device
+ * @sector: bi_sector attribute from struct bio
+ * @rw: bitmask, valid values are defined in enum ibnbd_io_flags
+ * @bi_size: number of bytes for I/O read/write
+ */
+struct ibnbd_msg_io {
+ struct ibnbd_msg_hdr hdr;
+ __le32 device_id;
+ __le64 sector;
+ __le32 rw;
+ __le32 bi_size;
+};
+
+#define IBNBD_OP_BITS 8
+#define IBNBD_OP_MASK ((1 << IBNBD_OP_BITS) - 1)
+
+/**
+ * enum ibnbd_io_flags - IBNBD request types from rq_flag_bits
+ * @IBNBD_OP_READ: read sectors from the device
+ * @IBNBD_OP_WRITE: write sectors to the device
+ * @IBNBD_OP_FLUSH: flush the volatile write cache
+ * @IBNBD_OP_DISCARD: discard sectors
+ * @IBNBD_OP_SECURE_ERASE: securely erase sectors
+ * @IBNBD_OP_WRITE_SAME: write the same sectors many times
+
+ * @IBNBD_F_SYNC: request is sync (sync write or read)
+ * @IBNBD_F_FUA: forced unit access
+ */
+enum ibnbd_io_flags {
+
+ /* Operations */
+
+ IBNBD_OP_READ = 0,
+ IBNBD_OP_WRITE = 1,
+ IBNBD_OP_FLUSH = 2,
+ IBNBD_OP_DISCARD = 3,
+ IBNBD_OP_SECURE_ERASE = 4,
+ IBNBD_OP_WRITE_SAME = 5,
+
+ IBNBD_OP_LAST,
+
+ /* Flags */
+
+ IBNBD_F_SYNC = 1<<(IBNBD_OP_BITS + 0),
+ IBNBD_F_FUA = 1<<(IBNBD_OP_BITS + 1),
+
+ IBNBD_F_ALL = (IBNBD_F_SYNC | IBNBD_F_FUA)
+
+};
+
+static inline u32 ibnbd_op(u32 flags)
+{
+ return (flags & IBNBD_OP_MASK);
+}
+
+static inline u32 ibnbd_flags(u32 flags)
+{
+ return (flags & ~IBNBD_OP_MASK);
+}
+
+static inline bool ibnbd_flags_supported(u32 flags)
+{
+ u32 op;
+
+ op = ibnbd_op(flags);
+ flags = ibnbd_flags(flags);
+
+ if (op >= IBNBD_OP_LAST)
+ return false;
+ if (flags & ~IBNBD_F_ALL)
+ return false;
+
+ return true;
+}
+
+static inline u32 ibnbd_to_bio_flags(u32 ibnbd_flags)
+{
+ u32 bio_flags;
+
+ switch (ibnbd_op(ibnbd_flags)) {
+ case IBNBD_OP_READ:
+ bio_flags = REQ_OP_READ;
+ break;
+ case IBNBD_OP_WRITE:
+ bio_flags = REQ_OP_WRITE;
+ break;
+ case IBNBD_OP_FLUSH:
+ bio_flags = REQ_OP_FLUSH | REQ_PREFLUSH;
+ break;
+ case IBNBD_OP_DISCARD:
+ bio_flags = REQ_OP_DISCARD;
+ break;
+ case IBNBD_OP_SECURE_ERASE:
+ bio_flags = REQ_OP_SECURE_ERASE;
+ break;
+ case IBNBD_OP_WRITE_SAME:
+ bio_flags = REQ_OP_WRITE_SAME;
+ break;
+ default:
+ WARN(1, "Unknown IBNBD type: %d (flags %d)\n",
+ ibnbd_op(ibnbd_flags), ibnbd_flags);
+ bio_flags = 0;
+ }
+
+ if (ibnbd_flags & IBNBD_F_SYNC)
+ bio_flags |= REQ_SYNC;
+
+ if (ibnbd_flags & IBNBD_F_FUA)
+ bio_flags |= REQ_FUA;
+
+ return bio_flags;
+}
+
+static inline u32 rq_to_ibnbd_flags(struct request *rq)
+{
+ u32 ibnbd_flags;
+
+ switch (req_op(rq)) {
+ case REQ_OP_READ:
+ ibnbd_flags = IBNBD_OP_READ;
+ break;
+ case REQ_OP_WRITE:
+ ibnbd_flags = IBNBD_OP_WRITE;
+ break;
+ case REQ_OP_DISCARD:
+ ibnbd_flags = IBNBD_OP_DISCARD;
+ break;
+ case REQ_OP_SECURE_ERASE:
+ ibnbd_flags = IBNBD_OP_SECURE_ERASE;
+ break;
+ case REQ_OP_WRITE_SAME:
+ ibnbd_flags = IBNBD_OP_WRITE_SAME;
+ break;
+ case REQ_OP_FLUSH:
+ ibnbd_flags = IBNBD_OP_FLUSH;
+ break;
+ default:
+ WARN(1, "Unknown request type %d (flags %llu)\n",
+ req_op(rq), (unsigned long long)rq->cmd_flags);
+ ibnbd_flags = 0;
+ }
+
+ if (op_is_sync(rq->cmd_flags))
+ ibnbd_flags |= IBNBD_F_SYNC;
+
+ if (op_is_flush(rq->cmd_flags))
+ ibnbd_flags |= IBNBD_F_FUA;
+
+ return ibnbd_flags;
+}
+
+static inline const char *ibnbd_io_mode_str(enum ibnbd_io_mode mode)
+{
+ switch (mode) {
+ case IBNBD_FILEIO:
+ return "fileio";
+ case IBNBD_BLOCKIO:
+ return "blockio";
+ case IBNBD_AUTOIO:
+ return "autoio";
+ default:
+ return "unknown";
+ }
+}
+
+static inline const char *ibnbd_access_mode_str(enum ibnbd_access_mode mode)
+{
+ switch (mode) {
+ case IBNBD_ACCESS_RO:
+ return "ro";
+ case IBNBD_ACCESS_RW:
+ return "rw";
+ case IBNBD_ACCESS_MIGRATION:
+ return "migration";
+ default:
+ return "unknown";
+ }
+}
+
+#endif /* IBNBD_PROTO_H */
--
2.13.1
next prev parent reply other threads:[~2018-05-18 13:04 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-18 13:03 [PATCH v2 00/26] InfiniBand Transport (IBTRS) and Network Block Device (IBNBD) Roman Pen
2018-05-18 13:03 ` [PATCH v2 01/26] rculist: introduce list_next_or_null_rr_rcu() Roman Pen
2018-05-18 16:56 ` Linus Torvalds
2018-05-19 20:25 ` Roman Penyaev
2018-05-19 21:04 ` Linus Torvalds
2018-05-19 16:37 ` Paul E. McKenney
2018-05-19 20:20 ` Roman Penyaev
2018-05-19 20:56 ` Linus Torvalds
2018-05-20 0:43 ` Paul E. McKenney
2018-05-21 13:50 ` Roman Penyaev
2018-05-21 15:16 ` Linus Torvalds
2018-05-21 15:33 ` Paul E. McKenney
2018-05-22 9:09 ` Roman Penyaev
2018-05-22 16:36 ` Paul E. McKenney
2018-05-22 16:38 ` Linus Torvalds
2018-05-22 17:04 ` Paul E. McKenney
2018-05-21 15:31 ` Paul E. McKenney
2018-05-22 9:09 ` Roman Penyaev
2018-05-22 17:03 ` Paul E. McKenney
2018-05-18 13:03 ` [PATCH v2 02/26] sysfs: export sysfs_remove_file_self() Roman Pen
2018-05-18 15:08 ` Tejun Heo
2018-05-18 13:03 ` [PATCH v2 03/26] ibtrs: public interface header to establish RDMA connections Roman Pen
2018-05-18 13:03 ` [PATCH v2 04/26] ibtrs: private headers with IBTRS protocol structs and helpers Roman Pen
2018-05-18 13:03 ` [PATCH v2 05/26] ibtrs: core: lib functions shared between client and server modules Roman Pen
2018-05-18 13:03 ` [PATCH v2 06/26] ibtrs: client: private header with client structs and functions Roman Pen
2018-05-18 13:03 ` [PATCH v2 07/26] ibtrs: client: main functionality Roman Pen
2018-05-18 13:03 ` [PATCH v2 08/26] ibtrs: client: statistics functions Roman Pen
2018-05-18 13:03 ` [PATCH v2 09/26] ibtrs: client: sysfs interface functions Roman Pen
2018-05-18 13:03 ` [PATCH v2 10/26] ibtrs: server: private header with server structs and functions Roman Pen
2018-05-18 13:03 ` [PATCH v2 11/26] ibtrs: server: main functionality Roman Pen
2018-05-18 13:03 ` [PATCH v2 12/26] ibtrs: server: statistics functions Roman Pen
2018-05-18 13:04 ` [PATCH v2 13/26] ibtrs: server: sysfs interface functions Roman Pen
2018-05-18 13:04 ` [PATCH v2 14/26] ibtrs: include client and server modules into kernel compilation Roman Pen
2018-05-20 22:14 ` kbuild test robot
2018-05-21 6:36 ` kbuild test robot
2018-05-22 5:05 ` Leon Romanovsky
2018-05-22 9:27 ` Roman Penyaev
2018-05-22 13:18 ` Leon Romanovsky
2018-05-22 16:12 ` Roman Penyaev
2018-05-18 13:04 ` [PATCH v2 15/26] ibtrs: a bit of documentation Roman Pen
2018-05-18 13:04 ` Roman Pen [this message]
2018-05-18 13:04 ` [PATCH v2 17/26] ibnbd: client: private header with client structs and functions Roman Pen
2018-05-18 13:04 ` [PATCH v2 18/26] ibnbd: client: main functionality Roman Pen
2018-05-18 13:04 ` [PATCH v2 19/26] ibnbd: client: sysfs interface functions Roman Pen
2018-05-18 13:04 ` [PATCH v2 20/26] ibnbd: server: private header with server structs and functions Roman Pen
2018-05-18 13:04 ` [PATCH v2 21/26] ibnbd: server: main functionality Roman Pen
2018-05-18 13:04 ` [PATCH v2 22/26] ibnbd: server: functionality for IO submission to file or block dev Roman Pen
2018-05-18 13:04 ` [PATCH v2 23/26] ibnbd: server: sysfs interface functions Roman Pen
2018-05-18 13:04 ` [PATCH v2 24/26] ibnbd: include client and server modules into kernel compilation Roman Pen
2018-05-20 17:21 ` kbuild test robot
2018-05-20 22:14 ` kbuild test robot
2018-05-21 5:33 ` kbuild test robot
2018-05-18 13:04 ` [PATCH v2 25/26] ibnbd: a bit of documentation Roman Pen
2018-05-18 13:04 ` [PATCH v2 26/26] MAINTAINERS: Add maintainer for IBNBD/IBTRS modules Roman Pen
2018-05-22 16:45 ` [PATCH v2 00/26] InfiniBand Transport (IBTRS) and Network Block Device (IBNBD) Jason Gunthorpe
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