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Searched +full:no +full:- +full:can +full:- +full:fd (Results 1 – 25 of 809) sorted by relevance

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/linux/Documentation/filesystems/
H A D	inotify.rst	1 .. SPDX-License-Identifier: GPL-2.0 4 Inotify - A Powerful yet Simple File Change Notification System 13 - Deleted obsoleted interface, just refer to manpages for user interface. 18 What is the design decision behind not tying the watch to the open fd of 29 What is the design decision behind using an-fd-per-instance as opposed to 30 an fd-per-watch? 33 An fd-per-watch quickly consumes more file descriptors than are allowed, 34 more fd's than are feasible to manage, and more fd's than are optimally 35 select()-able. Yes, root can bump the per-process fd limit and yes, users 36 can use epoll, but requiring both is a silly and extraneous requirement. [all …]
/linux/include/linux/can/
H A D	length.h	`1 /* SPDX-License-Identifier: GPL-2.0 / 3 Copyright (C) 2020 Marc Kleine-Budde <kernel@pengutronix.de> 11 #include <linux/can.h> 12 #include <linux/can/netlink.h> 16 * Size of a Classical CAN Standard Frame header in bits 19 * --------------------------------------------------------- 26 * FD Format indicator (FDF) 1 34 * Size of a Classical CAN Extended Frame header in bits 37 * --------------------------------------------------------- 46 * FD Format indicator (FDF) 1 [all …]`
/linux/tools/bpf/bpftool/
H A D	struct_ops.c	1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 51 t = btf__type_by_id(kern_btf, info->btf_vmlinux_value_type_id); in get_kern_struct_ops_name() 52 st_ops_name = btf__name_by_offset(kern_btf, t->name_off); in get_kern_struct_ops_name() 72 p_err("can't find bpf_map_info from btf_vmlinux"); in get_map_info_type_id() 78 map_info_alloc_len = map_info_type->size; in get_map_info_type_id() 117 * It returns the fd in "res_fd" and map_info in "info". 118 * In the very first iteration, info->id should be 0. 119 * An optional map "name" filter can be specified. 120 The filter can be made more flexible in the future. 121 * e.g. filter by kernel-struct-ops-name, regex-name, glob-name, ...etc. [all …]
H A D	common.c	1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2 /* Copyright (C) 2017-2018 Netronome Systems, Inc. / 84 / Probe whether kernel switched from memlock-based (RLIMIT_MEMLOCK) to 85 * memcg-based memory accounting for BPF maps and programs. This was done in 86 * commit 97306be45fbe ("Merge branch 'switch to memcg-base 201 int fd = -1; open_obj_pinned() local 230 int fd; open_obj_pinned_any() local 363 do_pin_fd(int fd,const char * name) do_pin_fd() argument 381 int fd; do_pin_any() local 454 get_fd_type(int fd) get_fd_type() argument 483 get_fdinfo(int fd,const char * key) get_fdinfo() argument 555 int fd, err = 0; do_build_table_cb() local 678 int fd; read_sysfs_hex_int() local 814 int fd, nb_fds = 0; prog_fd_by_nametag() local 947 int nb_fds, fd; prog_parse_fd() local 975 int fd, nb_fds = 0; map_fd_by_name() local 1108 int nb_fds, fd; map_parse_fd() local 1136 int fd; map_parse_fd_and_info() local [all...]
/linux/Documentation/networking/
H A D	can.rst	2 SocketCAN - Controller Area Network 8 The socketcan package is an implementation of CAN protocols 9 (Controller Area Network) for Linux. CAN is a networking technology 11 automotive fields. While there have been other CAN implementations 13 socket API, the Linux network stack and implements the CAN device 14 drivers as network interfaces. The CAN socket API has been designed 16 familiar with network programming, to easily learn how to use CAN 20 .. _socketcan-motivation: 25 There have been CAN implementations for Linux before SocketCAN so the 27 implementations come as a device driver for some CAN hardware, they [all …]
H A D	phonet.rst	`1 .. SPDX-License-Identifier: GPL-2.0 9 ------------ 12 and RPC. With the Linux Phonet socket family, Linux host processes can 16 Phonet packets can be exchanged through various hardware connections 19 - USB with the CDC Phonet interface, 20 - infrared, 21 - Bluetooth, 22 - an RS232 serial port (with a dedicated "FBUS" line discipline), 23 - the SSI bus with some TI OMAP processors. 27 -------------- [all …]`
H A D	tuntap.rst	1 .. SPDX-License-Identifier: GPL-2.0 8 Copyright \|copy\| 1999-2000 Maxim Krasnyansky <max_mk@yahoo.com> 11 Copyright \|copy\| 1999-2000 Maxim Krasnyansky <max_mk@yahoo.com> 14 Copyright \|copy\| 1999-2000 Maksim Yevmenkin <m_evmenkin@yahoo.com> 22 It can be seen as a simple Point-to-Point or Ethernet device, which, 40 br_select.c - bridge based on select system call. 41 br_sigio.c - bridge based on async io and SIGIO signal. 56 There's no harm in allowing the device to be accessible by non-root users, 65 Make sure that "Kernel module loader" - module auto-loading 83 ----------------------------- [all …]
/linux/Documentation/driver-api/mei/
H A D	mei.rst	1 .. SPDX-License-Identifier: GPL-2.0 7 resource (Co-processor) residing inside certain Intel chipsets. The Intel ME 18 each client has its own protocol. The protocol is message-based with a 30 The number of instances of an Intel ME feature that can be opened 37 Because some of the Intel ME features can change the system 41 The session is terminated calling :c:expr:`close(fd)`. 46 can use :c:macro:`MEI_CONNECT_CLIENT_IOCTL_VTAG` to create 50 .. code-block:: C 53 fd = open(MEI_DEVICE); 57 ioctl(fd, IOCTL_MEI_CONNECT_CLIENT, &data); [all …]
/linux/rust/kernel/fs/
H A D	file.rs	1 // SPDX-License-Identifier: GPL-2.0 25 /// Signal-driven I/O is enabled. 28 /// Close-on-exec flag is set. 99 /// File can be both read and written. 112 /// Instances of this type are reference-counted. The reference count is incremented by the 116 /// Whenever a process opens a file descriptor (fd), it stores a pointer to the file in its fd 123 /// Whenever a process has an fd to a file, it may use something called a "light refcount" as a 125 /// `fdput`. The idea behind light refcounts is that if the fd is not closed between the calls to 127 /// files_struct` holds a reference until the fd is closed. This means that it's safe to access the 130 /// The requirement that the fd is not closed during a light refcount applies globally across all [all …]
/linux/Documentation/networking/device_drivers/can/ctu/
H A D	ctucanfd-driver.rst	1 .. SPDX-License-Identifier: GPL-2.0-or-later 3 CTU CAN FD Driver 9 About CTU CAN FD IP Core 10 ------------------------ 12 `CTU CAN FD <https://gitlab.fel.cvut.cz/canbus/ctucanfd_ip_core>`_ 19 `Vivado integration <https://gitlab.fel.cvut.cz/canbus/zynq/zynq-can-sja1000-top>`_ 20 and Intel Cyclone V 5CSEMA4U23C6 based DE0-Nano-SoC Terasic board 21 `QSys integration <https://gitlab.fel.cvut.cz/canbus/intel-soc-ctucanfd>`_ 23 `PCIe integration <https://gitlab.fel.cvut.cz/canbus/pcie-ctucanfd>`_ of the core. 30 The basic functional model of the CTU CAN FD peripheral has been [all …]
/linux/Documentation/userspace-api/media/v4l/
H A D	standard.rst	1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 20 Applications can use the predefined bits to select a particular 34 band. Enumeration gives a "PAL-B/G" or "PAL-I" choice. Similar a 35 Composite input may collapse standards, enumerating "PAL-B/G/H/I", 36 "NTSC-M" and "SECAM-D/K". [#f1]_ 41 received standard can be sensed with the 47 :ref:`v4l2_std_id <v4l2-std-id>` type (a standard set), not an 55 - incapable of capturing fields or frames at the nominal rate of the 58 - that does not support the video standard formats at all. 66 Applications can make use of the :ref:`input-capabilities` and [all …]
H A D	vidioc-g-edid.rst	1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 13 VIDIOC_G_EDID - VIDIOC_S_EDID - VIDIOC_SUBDEV_G_EDID - VIDIOC_SUBDEV_S_EDID - Get or set the EDID o… 20 ``int ioctl(int fd, VIDIOC_G_EDID, struct v4l2_edid argp)`` 24 ``int ioctl(int fd, VIDIOC_S_EDID, struct v4l2_edid argp)`` 28 ``int ioctl(int fd, VIDIOC_SUBDEV_G_EDID, struct v4l2_edid argp)`` 32 ``int ioctl(int fd, VIDIOC_SUBDEV_S_EDID, struct v4l2_edid argp)`` 37 ``fd`` 46 These ioctls can be used to get or set an EDID associated with an input 47 from a receiver or an output of a transmitter device. They can be used 48 with subdevice nodes (/dev/v4l-subdevX) or with video nodes [all …]
H A D	vidioc-qbuf.rst	1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 13 VIDIOC_QBUF - VIDIOC_DQBUF - Exchange a buffer with the driver 20 ``int ioctl(int fd, VIDIOC_QBUF, struct v4l2_buffer argp)`` 24 ``int ioctl(int fd, VIDIOC_DQBUF, struct v4l2_buffer argp)`` 29 ``fd`` 58 :ref:`multi-planar API <planar-apis>`, the ``m.planes`` field must 59 contain a userspace pointer to a filled-in array of struct 73 multi-planar API is used, ``m.userptr`` and ``length`` members of the 86 ``memory`` field to ``V4L2_MEMORY_DMABUF`` and the ``m.fd`` field to a 87 file descriptor associated with a DMABUF buffer. When the multi-planar [all …]
H A D	mmap.rst	1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 21 application's address space. Device memory can be for example the video 22 memory on a graphics card with a video capture add-on. However, being 24 drivers support streaming as well, allocating buffers in DMA-able main 27 A driver can support many sets of buffers. Each set is identified by a 28 unique buffer type value. The sets are independent and each set can hold 35 This ioctl can also be used to change the number of buffers or to free 38 Before applications can access the buffers they must map them into their 40 location of the buffers in device memory can be determined with the 41 :ref:`VIDIOC_QUERYBUF` ioctl. In the single-planar [all …]
H A D	vidioc-streamon.rst	1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 13 VIDIOC_STREAMON - VIDIOC_STREAMOFF - Start or stop streaming I/O 20 ``int ioctl(int fd, VIDIOC_STREAMON, const int argp)`` 24 ``int ioctl(int fd, VIDIOC_STREAMOFF, const int argp)`` 29 ``fd`` 43 Capture hardware is disabled and no input buffers are filled (if there 45 has been called. Output hardware is disabled and no video signal is 48 Memory-to-memory devices will not start until ``VIDIOC_STREAMON`` has 60 :ref:`VIDIOC_REQBUFS` and can be restarted 67 calling :ref:`VIDIOC_REQBUFS` and can be restarted [all …]
H A D	func-read.rst	1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 4 .. _func-read: 13 v4l2-read - Read from a V4L2 device 18 .. code-block:: c 22 .. c:function:: ssize_t read( int fd, void *buf, size_t count ) 27 ``fd`` 40 descriptor ``fd`` into the buffer starting at ``buf``. The layout of the 43 and has no other results. If ``count`` is greater than ``SSIZE_MAX``, 50 function it returns immediately with an ``EAGAIN`` error code when no data 52 :c:func:`poll()` functions can always be used to suspend [all …]
/linux/tools/perf/Documentation/
H A D	perf-stat.txt	`1 perf-stat(1) 5 ---- 6 perf-stat - Run a command and gather performance counter statistics 9 -------- 11 'perf stat' [-e <EVENT> \| --event=EVENT] [-a] <command> 12 'perf stat' [-e <EVENT> \| --event=EVENT] [-a] \-- <command> [<options>] 13 'perf stat' [-e <EVENT> \| --event=EVENT] [-a] record [-o file] \-- <command> [<options>] 14 'perf stat' report [-i file] 17 ----------- 23 ------- [all …]`
/linux/tools/testing/selftests/mincore/
H A D	mincore_selftest.c	`1 // SPDX-License-Identifier: GPL-2.0+ 46 EXPECT_EQ(-1, retval); in TEST() 51 MAP_SHARED \| MAP_ANONYMOUS, -1, 0); in TEST() 56 /* <addr> argument is not page-aligned / in TEST() 59 EXPECT_EQ(-1, retval); in TEST() 64 retval = mincore(addr, -1, vec); in TEST() 65 EXPECT_EQ(-1, retval); in TEST() 71 EXPECT_EQ(-1, retval); in TEST() 80 but after accessing it (on-demand allocation). 81 * Then free the page and check that it's not memory-resident. [all …]`
/linux/tools/perf/util/
H A D	tool_pmu.c	1 // SPDX-License-Identifier: GPL-2.0-only 7 #include "print-events.h" 9 #include "time-utils.h" 88 return pmu && pmu->type == PERF_PMU_TYPE_TOOL; in perf_pmu__is_tool() 93 return perf_pmu__is_tool(evsel->pmu); in evsel__is_tool() 101 return (enum tool_pmu_event)evsel->core.attr.config; in evsel__tool_event() 106 return tool_pmu__event_to_str(evsel->core.attr.config); in evsel__tool_pmu_event_name() 115 if (c == -1) in read_until_char() 121 static int read_stat_field(int fd, struct perf_cpu cpu, int field, __u64 *val) in read_stat_field() argument 127 io__init(&io, fd, buf, sizeof(buf)); in read_stat_field() [all …]
/linux/tools/usb/
H A D	testusb.c	1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* $(CROSS_COMPILE)cc -Wall -Wextra -g -lpthread -o testusb testusb.c / 12 kernel driver. It can generate a variety of transfer patterns; you 16 * For more information on how this can be used and on USB testing 17 * refer to <URL:http://www.linux-usb.org/usbtest/>. 36 /-------------------------------------------------------------------------/ 44 unsigned test_num; /* 0..(TEST_CASES-1) / 55 /-------------------------------------------------------------------------/ 105 /-------------------------------------------------------------------------*/ 116 case USB_SPEED_SUPER_PLUS: return "super-plus"; in speed() [all …]
/linux/fs/jffs2/
H A D	build.c	2 * JFFS2 -- Journalling Flash File System, Version 2. 4 * Copyright © 2001-2007 Red Hat, Inc. 5 * Copyright © 2004-2010 David Woodhouse <dwmw2@infradead.org> 29 for (; i < c->inocache_hashsize; (i)++) { in first_inode_chain() 30 if (c->inocache_list[i]) in first_inode_chain() 31 return c->inocache_list[i]; in first_inode_chain() 40 if (ic->next) in next_inode() 41 return ic->next; in next_inode() 56 struct jffs2_full_dirent *fd; in jffs2_build_inode_pass1() local 58 dbg_fsbuild("building directory inode #%u\n", ic->ino); in jffs2_build_inode_pass1() [all …]
/linux/Documentation/userspace-api/media/rc/
H A D	lirc-get-timeout.rst	1 .. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later 14 LIRC_GET_MIN_TIMEOUT / LIRC_GET_MAX_TIMEOUT - Obtain the possible timeout 22 ``int ioctl(int fd, LIRC_GET_MIN_TIMEOUT, __u32 timeout)`` 26 ``int ioctl(int fd, LIRC_GET_MAX_TIMEOUT, __u32 timeout)`` 31 ``fd`` 40 Some devices have internal timers that can be used to detect when 41 there's no IR activity for a long time. This can help lircd in 42 detecting that a IR signal is finished and can speed up the decoding 44 that can be set. 55 On success 0 is returned, on error -1 and the ``errno`` variable is set [all …]
/linux/Documentation/bpf/
H A D	map_of_maps.rst	1 .. SPDX-License-Identifier: GPL-2.0-only 9 - ``BPF_MAP_TYPE_ARRAY_OF_MAPS`` and ``BPF_MAP_TYPE_HASH_OF_MAPS`` were 15 ``array_of_maps->sock_map``. 19 separate lifetime from the outer map and can be deleted after the outer map has 27 - Multi-level nesting is not supported. 28 - Any BPF map type can be used as an inner map, except for 30 - A BPF program cannot update or delete outer map entries. 32 For ``BPF_MAP_TYPE_ARRAY_OF_MAPS`` the key is an unsigned 32-bit integer index 36 For ``BPF_MAP_TYPE_HASH_OF_MAPS`` the key type can be chosen when defining the 38 the max_entries limit that you specify. Hash maps use pre-allocation of hash [all …]
/linux/include/uapi/xen/
H A D	gntdev.h	1 /* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR MIT) / 10 This program is free software; you can redistribute it and/or 28 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 51 * considered opaque to userspace, with one exception: if no grant 54 * with userspace APIs that expect a file descriptor that can be 91 * to @vaddr. This can be used to perform a munmap(), followed by an 92 * UNMAP_GRANT_REF ioctl, where no state about the offset is retained by 99 * contiguously-allocated range at once, and not any subrange thereof. 130 * Sets up an unmap notification within the page, so that the other side can do 131 * cleanup if this side crashes. Required to implement cross-domain robust [all …]
/linux/fs/
H A D	file.c	1 // SPDX-License-Identifier: GPL-2.0 5 * Copyright (C) 1998-1999, Stephen Tweedie and Bill Hawes 7 * Manage the dynamic fd arrays in the process files_struct. 37 atomic_long_set(&ref->refcnt, FILE_REF_DEAD); in __file_ref_put_badval() 47 atomic_long_set(&ref->refcnt, FILE_REF_SATURATED); in __file_ref_put_badval() 52 * __file_ref_put - Slowpath of file_ref_put() 59 * True if this was the last reference with no future references 60 * possible. This signals the caller that it can safely schedule the 75 * This can fail if a concurrent get() operation has in __file_ref_put() 81 if (!atomic_long_try_cmpxchg_release(&ref->refcnt, &cnt, FILE_REF_DEAD)) in __file_ref_put() [all …]

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