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authornkozlovskiy <nmk@ydb.tech>2023-10-11 19:11:46 +0300
committernkozlovskiy <nmk@ydb.tech>2023-10-11 19:33:28 +0300
commit61b3971447e473726d6cdb23fc298e457b4d973c (patch)
treee2a2a864bb7717f7ae6138f6a3194a254dd2c7bb /contrib/libs/linux-headers/linux/nbd.h
parenta674dc57d88d43c2e8e90a6084d5d2c988e0402c (diff)
downloadydb-61b3971447e473726d6cdb23fc298e457b4d973c.tar.gz
add sanitizers dependencies
Diffstat (limited to 'contrib/libs/linux-headers/linux/nbd.h')
-rw-r--r--contrib/libs/linux-headers/linux/nbd.h104
1 files changed, 104 insertions, 0 deletions
diff --git a/contrib/libs/linux-headers/linux/nbd.h b/contrib/libs/linux-headers/linux/nbd.h
new file mode 100644
index 0000000000..dc6cb17c8c
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+++ b/contrib/libs/linux-headers/linux/nbd.h
@@ -0,0 +1,104 @@
+/* SPDX-License-Identifier: GPL-1.0+ WITH Linux-syscall-note */
+/*
+ * 1999 Copyright (C) Pavel Machek, pavel@ucw.cz. This code is GPL.
+ * 1999/11/04 Copyright (C) 1999 VMware, Inc. (Regis "HPReg" Duchesne)
+ * Made nbd_end_request() use the io_request_lock
+ * 2001 Copyright (C) Steven Whitehouse
+ * New nbd_end_request() for compatibility with new linux block
+ * layer code.
+ * 2003/06/24 Louis D. Langholtz <ldl@aros.net>
+ * Removed unneeded blksize_bits field from nbd_device struct.
+ * Cleanup PARANOIA usage & code.
+ * 2004/02/19 Paul Clements
+ * Removed PARANOIA, plus various cleanup and comments
+ * 2023 Copyright Red Hat
+ * Link to userspace extensions, favor cookie over handle.
+ */
+
+#ifndef LINUX_NBD_H
+#define LINUX_NBD_H
+
+#include <linux/types.h>
+
+#define NBD_SET_SOCK _IO( 0xab, 0 )
+#define NBD_SET_BLKSIZE _IO( 0xab, 1 )
+#define NBD_SET_SIZE _IO( 0xab, 2 )
+#define NBD_DO_IT _IO( 0xab, 3 )
+#define NBD_CLEAR_SOCK _IO( 0xab, 4 )
+#define NBD_CLEAR_QUE _IO( 0xab, 5 )
+#define NBD_PRINT_DEBUG _IO( 0xab, 6 )
+#define NBD_SET_SIZE_BLOCKS _IO( 0xab, 7 )
+#define NBD_DISCONNECT _IO( 0xab, 8 )
+#define NBD_SET_TIMEOUT _IO( 0xab, 9 )
+#define NBD_SET_FLAGS _IO( 0xab, 10)
+
+/*
+ * See also https://github.com/NetworkBlockDevice/nbd/blob/master/doc/proto.md
+ * for additional userspace extensions not yet utilized in the kernel module.
+ */
+
+enum {
+ NBD_CMD_READ = 0,
+ NBD_CMD_WRITE = 1,
+ NBD_CMD_DISC = 2,
+ NBD_CMD_FLUSH = 3,
+ NBD_CMD_TRIM = 4
+ /* userspace defines additional extension commands */
+};
+
+/* values for flags field, these are server interaction specific. */
+#define NBD_FLAG_HAS_FLAGS (1 << 0) /* nbd-server supports flags */
+#define NBD_FLAG_READ_ONLY (1 << 1) /* device is read-only */
+#define NBD_FLAG_SEND_FLUSH (1 << 2) /* can flush writeback cache */
+#define NBD_FLAG_SEND_FUA (1 << 3) /* send FUA (forced unit access) */
+/* there is a gap here to match userspace */
+#define NBD_FLAG_SEND_TRIM (1 << 5) /* send trim/discard */
+#define NBD_FLAG_CAN_MULTI_CONN (1 << 8) /* Server supports multiple connections per export. */
+
+/* values for cmd flags in the upper 16 bits of request type */
+#define NBD_CMD_FLAG_FUA (1 << 16) /* FUA (forced unit access) op */
+
+/* These are client behavior specific flags. */
+#define NBD_CFLAG_DESTROY_ON_DISCONNECT (1 << 0) /* delete the nbd device on
+ disconnect. */
+#define NBD_CFLAG_DISCONNECT_ON_CLOSE (1 << 1) /* disconnect the nbd device on
+ * close by last opener.
+ */
+
+/* userspace doesn't need the nbd_device structure */
+
+/* These are sent over the network in the request/reply magic fields */
+
+#define NBD_REQUEST_MAGIC 0x25609513
+#define NBD_REPLY_MAGIC 0x67446698
+/* Do *not* use magics: 0x12560953 0x96744668. */
+/* magic 0x668e33ef for structured reply not supported by kernel yet */
+
+/*
+ * This is the packet used for communication between client and
+ * server. All data are in network byte order.
+ */
+struct nbd_request {
+ __be32 magic; /* NBD_REQUEST_MAGIC */
+ __be32 type; /* See NBD_CMD_* */
+ union {
+ __be64 cookie; /* Opaque identifier for request */
+ char handle[8]; /* older spelling of cookie */
+ };
+ __be64 from;
+ __be32 len;
+} __attribute__((packed));
+
+/*
+ * This is the reply packet that nbd-server sends back to the client after
+ * it has completed an I/O request (or an error occurs).
+ */
+struct nbd_reply {
+ __be32 magic; /* NBD_REPLY_MAGIC */
+ __be32 error; /* 0 = ok, else error */
+ union {
+ __be64 cookie; /* Opaque identifier from request */
+ char handle[8]; /* older spelling of cookie */
+ };
+};
+#endif /* LINUX_NBD_H */