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b24413180f
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
160 lines
5.0 KiB
C
160 lines
5.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_VIRTIO_VSOCK_H
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#define _LINUX_VIRTIO_VSOCK_H
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#include <uapi/linux/virtio_vsock.h>
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#include <linux/socket.h>
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#include <net/sock.h>
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#include <net/af_vsock.h>
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#define VIRTIO_VSOCK_DEFAULT_MIN_BUF_SIZE 128
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#define VIRTIO_VSOCK_DEFAULT_BUF_SIZE (1024 * 256)
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#define VIRTIO_VSOCK_DEFAULT_MAX_BUF_SIZE (1024 * 256)
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#define VIRTIO_VSOCK_DEFAULT_RX_BUF_SIZE (1024 * 4)
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#define VIRTIO_VSOCK_MAX_BUF_SIZE 0xFFFFFFFFUL
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#define VIRTIO_VSOCK_MAX_PKT_BUF_SIZE (1024 * 64)
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enum {
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VSOCK_VQ_RX = 0, /* for host to guest data */
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VSOCK_VQ_TX = 1, /* for guest to host data */
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VSOCK_VQ_EVENT = 2,
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VSOCK_VQ_MAX = 3,
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};
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/* Per-socket state (accessed via vsk->trans) */
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struct virtio_vsock_sock {
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struct vsock_sock *vsk;
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/* Protected by lock_sock(sk_vsock(trans->vsk)) */
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u32 buf_size;
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u32 buf_size_min;
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u32 buf_size_max;
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spinlock_t tx_lock;
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spinlock_t rx_lock;
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/* Protected by tx_lock */
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u32 tx_cnt;
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u32 buf_alloc;
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u32 peer_fwd_cnt;
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u32 peer_buf_alloc;
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/* Protected by rx_lock */
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u32 fwd_cnt;
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u32 rx_bytes;
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struct list_head rx_queue;
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};
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struct virtio_vsock_pkt {
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struct virtio_vsock_hdr hdr;
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struct work_struct work;
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struct list_head list;
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/* socket refcnt not held, only use for cancellation */
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struct vsock_sock *vsk;
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void *buf;
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u32 len;
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u32 off;
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bool reply;
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};
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struct virtio_vsock_pkt_info {
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u32 remote_cid, remote_port;
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struct vsock_sock *vsk;
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struct msghdr *msg;
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u32 pkt_len;
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u16 type;
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u16 op;
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u32 flags;
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bool reply;
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};
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struct virtio_transport {
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/* This must be the first field */
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struct vsock_transport transport;
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/* Takes ownership of the packet */
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int (*send_pkt)(struct virtio_vsock_pkt *pkt);
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};
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ssize_t
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virtio_transport_stream_dequeue(struct vsock_sock *vsk,
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struct msghdr *msg,
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size_t len,
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int type);
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int
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virtio_transport_dgram_dequeue(struct vsock_sock *vsk,
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struct msghdr *msg,
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size_t len, int flags);
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s64 virtio_transport_stream_has_data(struct vsock_sock *vsk);
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s64 virtio_transport_stream_has_space(struct vsock_sock *vsk);
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int virtio_transport_do_socket_init(struct vsock_sock *vsk,
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struct vsock_sock *psk);
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u64 virtio_transport_get_buffer_size(struct vsock_sock *vsk);
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u64 virtio_transport_get_min_buffer_size(struct vsock_sock *vsk);
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u64 virtio_transport_get_max_buffer_size(struct vsock_sock *vsk);
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void virtio_transport_set_buffer_size(struct vsock_sock *vsk, u64 val);
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void virtio_transport_set_min_buffer_size(struct vsock_sock *vsk, u64 val);
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void virtio_transport_set_max_buffer_size(struct vsock_sock *vs, u64 val);
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int
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virtio_transport_notify_poll_in(struct vsock_sock *vsk,
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size_t target,
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bool *data_ready_now);
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int
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virtio_transport_notify_poll_out(struct vsock_sock *vsk,
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size_t target,
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bool *space_available_now);
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int virtio_transport_notify_recv_init(struct vsock_sock *vsk,
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size_t target, struct vsock_transport_recv_notify_data *data);
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int virtio_transport_notify_recv_pre_block(struct vsock_sock *vsk,
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size_t target, struct vsock_transport_recv_notify_data *data);
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int virtio_transport_notify_recv_pre_dequeue(struct vsock_sock *vsk,
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size_t target, struct vsock_transport_recv_notify_data *data);
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int virtio_transport_notify_recv_post_dequeue(struct vsock_sock *vsk,
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size_t target, ssize_t copied, bool data_read,
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struct vsock_transport_recv_notify_data *data);
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int virtio_transport_notify_send_init(struct vsock_sock *vsk,
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struct vsock_transport_send_notify_data *data);
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int virtio_transport_notify_send_pre_block(struct vsock_sock *vsk,
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struct vsock_transport_send_notify_data *data);
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int virtio_transport_notify_send_pre_enqueue(struct vsock_sock *vsk,
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struct vsock_transport_send_notify_data *data);
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int virtio_transport_notify_send_post_enqueue(struct vsock_sock *vsk,
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ssize_t written, struct vsock_transport_send_notify_data *data);
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u64 virtio_transport_stream_rcvhiwat(struct vsock_sock *vsk);
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bool virtio_transport_stream_is_active(struct vsock_sock *vsk);
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bool virtio_transport_stream_allow(u32 cid, u32 port);
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int virtio_transport_dgram_bind(struct vsock_sock *vsk,
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struct sockaddr_vm *addr);
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bool virtio_transport_dgram_allow(u32 cid, u32 port);
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int virtio_transport_connect(struct vsock_sock *vsk);
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int virtio_transport_shutdown(struct vsock_sock *vsk, int mode);
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void virtio_transport_release(struct vsock_sock *vsk);
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ssize_t
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virtio_transport_stream_enqueue(struct vsock_sock *vsk,
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struct msghdr *msg,
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size_t len);
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int
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virtio_transport_dgram_enqueue(struct vsock_sock *vsk,
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struct sockaddr_vm *remote_addr,
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struct msghdr *msg,
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size_t len);
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void virtio_transport_destruct(struct vsock_sock *vsk);
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void virtio_transport_recv_pkt(struct virtio_vsock_pkt *pkt);
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void virtio_transport_free_pkt(struct virtio_vsock_pkt *pkt);
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void virtio_transport_inc_tx_pkt(struct virtio_vsock_sock *vvs, struct virtio_vsock_pkt *pkt);
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u32 virtio_transport_get_credit(struct virtio_vsock_sock *vvs, u32 wanted);
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void virtio_transport_put_credit(struct virtio_vsock_sock *vvs, u32 credit);
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void virtio_transport_deliver_tap_pkt(struct virtio_vsock_pkt *pkt);
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#endif /* _LINUX_VIRTIO_VSOCK_H */
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