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6f52b16c5b
Many user space API headers are missing licensing information, which makes it hard for compliance tools to determine the correct license. By default are files without license information under the default license of the kernel, which is GPLV2. Marking them GPLV2 would exclude them from being included in non GPLV2 code, which is obviously not intended. The user space API headers fall under the syscall exception which is in the kernels COPYING file: NOTE! This copyright does *not* cover user programs that use kernel services by normal system calls - this is merely considered normal use of the kernel, and does *not* fall under the heading of "derived work". otherwise syscall usage would not be possible. Update the files which contain no license information with an SPDX license identifier. The chosen identifier is 'GPL-2.0 WITH Linux-syscall-note' which is the officially assigned identifier for the Linux syscall exception. SPDX license identifiers are 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. See the previous patch in this series for the methodology of how this patch was researched. 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>
108 lines
3.6 KiB
C
108 lines
3.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef _UAPI_LINUX_SHM_H_
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#define _UAPI_LINUX_SHM_H_
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#include <linux/ipc.h>
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#include <linux/errno.h>
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#include <asm-generic/hugetlb_encode.h>
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#ifndef __KERNEL__
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#include <unistd.h>
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#endif
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/*
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* SHMMNI, SHMMAX and SHMALL are default upper limits which can be
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* modified by sysctl. The SHMMAX and SHMALL values have been chosen to
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* be as large possible without facilitating scenarios where userspace
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* causes overflows when adjusting the limits via operations of the form
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* "retrieve current limit; add X; update limit". It is therefore not
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* advised to make SHMMAX and SHMALL any larger. These limits are
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* suitable for both 32 and 64-bit systems.
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*/
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#define SHMMIN 1 /* min shared seg size (bytes) */
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#define SHMMNI 4096 /* max num of segs system wide */
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#define SHMMAX (ULONG_MAX - (1UL << 24)) /* max shared seg size (bytes) */
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#define SHMALL (ULONG_MAX - (1UL << 24)) /* max shm system wide (pages) */
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#define SHMSEG SHMMNI /* max shared segs per process */
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/* Obsolete, used only for backwards compatibility and libc5 compiles */
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struct shmid_ds {
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struct ipc_perm shm_perm; /* operation perms */
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int shm_segsz; /* size of segment (bytes) */
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__kernel_time_t shm_atime; /* last attach time */
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__kernel_time_t shm_dtime; /* last detach time */
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__kernel_time_t shm_ctime; /* last change time */
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__kernel_ipc_pid_t shm_cpid; /* pid of creator */
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__kernel_ipc_pid_t shm_lpid; /* pid of last operator */
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unsigned short shm_nattch; /* no. of current attaches */
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unsigned short shm_unused; /* compatibility */
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void *shm_unused2; /* ditto - used by DIPC */
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void *shm_unused3; /* unused */
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};
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/* Include the definition of shmid64_ds and shminfo64 */
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#include <asm/shmbuf.h>
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/*
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* shmget() shmflg values.
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*/
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/* The bottom nine bits are the same as open(2) mode flags */
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#define SHM_R 0400 /* or S_IRUGO from <linux/stat.h> */
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#define SHM_W 0200 /* or S_IWUGO from <linux/stat.h> */
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/* Bits 9 & 10 are IPC_CREAT and IPC_EXCL */
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#define SHM_HUGETLB 04000 /* segment will use huge TLB pages */
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#define SHM_NORESERVE 010000 /* don't check for reservations */
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/*
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* Huge page size encoding when SHM_HUGETLB is specified, and a huge page
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* size other than the default is desired. See hugetlb_encode.h
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*/
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#define SHM_HUGE_SHIFT HUGETLB_FLAG_ENCODE_SHIFT
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#define SHM_HUGE_MASK HUGETLB_FLAG_ENCODE_MASK
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#define SHM_HUGE_64KB HUGETLB_FLAG_ENCODE_64KB
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#define SHM_HUGE_512KB HUGETLB_FLAG_ENCODE_512KB
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#define SHM_HUGE_1MB HUGETLB_FLAG_ENCODE_1MB
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#define SHM_HUGE_2MB HUGETLB_FLAG_ENCODE_2MB
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#define SHM_HUGE_8MB HUGETLB_FLAG_ENCODE_8MB
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#define SHM_HUGE_16MB HUGETLB_FLAG_ENCODE_16MB
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#define SHM_HUGE_256MB HUGETLB_FLAG_ENCODE_256MB
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#define SHM_HUGE_1GB HUGETLB_FLAG_ENCODE_1GB
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#define SHM_HUGE_2GB HUGETLB_FLAG_ENCODE_2GB
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#define SHM_HUGE_16GB HUGETLB_FLAG_ENCODE_16GB
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/*
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* shmat() shmflg values
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*/
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#define SHM_RDONLY 010000 /* read-only access */
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#define SHM_RND 020000 /* round attach address to SHMLBA boundary */
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#define SHM_REMAP 040000 /* take-over region on attach */
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#define SHM_EXEC 0100000 /* execution access */
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/* super user shmctl commands */
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#define SHM_LOCK 11
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#define SHM_UNLOCK 12
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/* ipcs ctl commands */
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#define SHM_STAT 13
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#define SHM_INFO 14
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/* Obsolete, used only for backwards compatibility */
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struct shminfo {
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int shmmax;
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int shmmin;
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int shmmni;
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int shmseg;
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int shmall;
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};
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struct shm_info {
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int used_ids;
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__kernel_ulong_t shm_tot; /* total allocated shm */
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__kernel_ulong_t shm_rss; /* total resident shm */
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__kernel_ulong_t shm_swp; /* total swapped shm */
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__kernel_ulong_t swap_attempts;
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__kernel_ulong_t swap_successes;
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};
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#endif /* _UAPI_LINUX_SHM_H_ */
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