#include <sys/cdefs.h>
#include "opt_capsicum.h"
#include <sys/param.h>
#include <sys/capability.h>
#include <sys/conf.h>
#include <sys/fcntl.h>
#include <sys/file.h>
#include <sys/filedesc.h>
#include <sys/fnv_hash.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mman.h>
#include <sys/mutex.h>
#include <sys/priv.h>
#include <sys/proc.h>
#include <sys/refcount.h>
#include <sys/resourcevar.h>
#include <sys/stat.h>
#include <sys/sysctl.h>
#include <sys/sysproto.h>
#include <sys/systm.h>
#include <sys/sx.h>
#include <sys/time.h>
#include <sys/vnode.h>
#include <security/mac/mac_framework.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/pmap.h>
#include <vm/vm_extern.h>
#include <vm/vm_map.h>
#include <vm/vm_kern.h>
#include <vm/vm_object.h>
#include <vm/vm_page.h>
#include <vm/vm_pageout.h>
#include <vm/vm_pager.h>
#include <vm/swap_pager.h>

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Data Structures
struct	shm_mapping

Macros
#define	SHM_HASH(fnv) (&shm_dictionary[(fnv) & shm_hash])

Functions
	__FBSDID ("$BSDSUniX$")

static	MALLOC_DEFINE (M_SHMFD,"shmfd","shared memory file descriptor")

static	LIST_HEAD (shm_mapping)

	FEATURE (posix_shm,"POSIX shared memory")

static int	shm_read (struct file fp, struct uio uio, struct ucred active_cred, int flags, struct thread td)

static int	shm_write (struct file fp, struct uio uio, struct ucred active_cred, int flags, struct thread td)

static int	shm_truncate (struct file fp, off_t length, struct ucred active_cred, struct thread *td)

static int	shm_ioctl (struct file fp, u_long com, void data, struct ucred active_cred, struct thread td)

static int	shm_poll (struct file fp, int events, struct ucred active_cred, struct thread *td)

static int	shm_kqfilter (struct file fp, struct knote kn)

static int	shm_stat (struct file fp, struct stat sb, struct ucred active_cred, struct thread td)

static int	shm_close (struct file fp, struct thread td)

static int	shm_dotruncate (struct shmfd *shmfd, off_t length)

static struct shmfd *	shm_alloc (struct ucred *ucred, mode_t mode)

static struct shmfd *	shm_hold (struct shmfd *shmfd)

static void	shm_drop (struct shmfd *shmfd)

static int	shm_access (struct shmfd shmfd, struct ucred ucred, int flags)

static void	shm_init (void *arg)

	SYSINIT (shm_init, SI_SUB_SYSV_SHM, SI_ORDER_ANY, shm_init, NULL)

static struct shmfd *	shm_lookup (char *path, Fnv32_t fnv)

static void	shm_insert (char path, Fnv32_t fnv, struct shmfd shmfd)

static int	shm_remove (char path, Fnv32_t fnv, struct ucred ucred)

int	sys_shm_open (struct thread td, struct shm_open_args uap)

int	sys_shm_unlink (struct thread td, struct shm_unlink_args uap)

int	shm_mmap (struct shmfd shmfd, vm_size_t objsize, vm_ooffset_t foff, vm_object_t obj)

static int	shm_chmod (struct file fp, mode_t mode, struct ucred active_cred, struct thread *td)

static int	shm_chown (struct file fp, uid_t uid, gid_t gid, struct ucred active_cred, struct thread *td)

int	shm_map (struct file fp, size_t size, off_t offset, void *memp)

int	shm_unmap (struct file fp, void mem, size_t size)

void	shm_path (struct shmfd shmfd, char path, size_t size)

Macro Definition Documentation

#define SHM_HASH ( fnv ) (&shm_dictionary[(fnv) & shm_hash])

Referenced by shm_insert(), shm_lookup(), and shm_remove().

Function Documentation

__FBSDID ( "$BSDSUniX$" )

FEATURE	(	posix_shm	,
		"POSIX shared memory"
	)

static LIST_HEAD ( shm_mapping )

static

Definition at line 95 of file uipc_shm.c.

static MALLOC_DEFINE	(	M_SHMFD	,
		"shmfd"	,
		"shared memory file descriptor"
	)

static

static int shm_access	(	struct shmfd *	shmfd,
		struct ucred *	ucred,
		int	flags
	)

static

Definition at line 428 of file uipc_shm.c.

References accmode, and vaccess().

Referenced by shm_remove(), and sys_shm_open().

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static struct shmfd* shm_alloc	(	struct ucred *	ucred,
		mode_t	mode
	)

static

Definition at line 366 of file uipc_shm.c.

References alloc_unr(), malloc(), mode, and vfs_timestamp().

Referenced by sys_shm_open().

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static int shm_chmod	(	struct file *	fp,
		mode_t	mode,
		struct ucred *	active_cred,
		struct thread *	td
	)

static

Definition at line 703 of file uipc_shm.c.

References vaccess().

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static int shm_chown	(	struct file *	fp,
		uid_t	uid,
		gid_t	gid,
		struct ucred *	active_cred,
		struct thread *	td
	)

static

Definition at line 732 of file uipc_shm.c.

References groupmember(), and priv_check_cred().

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static int shm_close	(	struct file *	fp,
		struct thread *	td
	)

static

Definition at line 240 of file uipc_shm.c.

References shm_drop().

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static int shm_dotruncate	(	struct shmfd *	shmfd,
		off_t	length
	)

static

Definition at line 252 of file uipc_shm.c.

References vfs_timestamp().

Referenced by shm_truncate(), and sys_shm_open().

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static void shm_drop ( struct shmfd * shmfd )

static

Definition at line 409 of file uipc_shm.c.

References free(), and free_unr().

Referenced by shm_close(), and shm_remove().

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static struct shmfd* shm_hold ( struct shmfd * shmfd )

static

Definition at line 401 of file uipc_shm.c.

Referenced by shm_insert(), and sys_shm_open().

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static void shm_init ( void * arg )

static

Definition at line 451 of file uipc_shm.c.

References hashinit(), mtx_init(), and new_unrhdr().

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static void shm_insert	(	char *	path,
		Fnv32_t	fnv,
		struct shmfd *	shmfd
	)

static

Definition at line 480 of file uipc_shm.c.

References malloc(), path, SHM_HASH, shm_hold(), shm_mapping::sm_fnv, shm_mapping::sm_path, and shm_mapping::sm_shmfd.

Referenced by sys_shm_open().

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static int shm_ioctl	(	struct file *	fp,
		u_long	com,
		void *	data,
		struct ucred *	active_cred,
		struct thread *	td
	)

static

Definition at line 177 of file uipc_shm.c.

static int shm_kqfilter	(	struct file *	fp,
		struct knote *	kn
	)

static

Definition at line 193 of file uipc_shm.c.

static struct shmfd* shm_lookup	(	char *	path,
		Fnv32_t	fnv
	)

static

Definition at line 465 of file uipc_shm.c.

References SHM_HASH, shm_mapping::sm_fnv, shm_mapping::sm_path, and shm_mapping::sm_shmfd.

Referenced by sys_shm_open().

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int shm_map	(	struct file *	fp,
		size_t	size,
		off_t	offset,
		void **	memp
	)

Definition at line 766 of file uipc_shm.c.

int shm_mmap	(	struct shmfd *	shmfd,
		vm_size_t	objsize,
		vm_ooffset_t	foff,
		vm_object_t *	obj
	)

Definition at line 682 of file uipc_shm.c.

References vfs_timestamp().

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void shm_path	(	struct shmfd *	shmfd,
		char *	path,
		size_t	size
	)

Definition at line 864 of file uipc_shm.c.

Referenced by fill_shm_info().

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static int shm_poll	(	struct file *	fp,
		int	events,
		struct ucred *	active_cred,
		struct thread *	td
	)

static

Definition at line 185 of file uipc_shm.c.

static int shm_read	(	struct file *	fp,
		struct uio *	uio,
		struct ucred *	active_cred,
		int	flags,
		struct thread *	td
	)

static

Definition at line 143 of file uipc_shm.c.

static int shm_remove	(	char *	path,
		Fnv32_t	fnv,
		struct ucred *	ucred
	)

static

Definition at line 493 of file uipc_shm.c.

References free(), shm_access(), shm_drop(), SHM_HASH, shm_mapping::sm_fnv, shm_mapping::sm_path, and shm_mapping::sm_shmfd.

Referenced by sys_shm_unlink().

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static int shm_stat	(	struct file *	fp,
		struct stat *	sb,
		struct ucred *	active_cred,
		struct thread *	td
	)

static

Definition at line 200 of file uipc_shm.c.

static int shm_truncate	(	struct file *	fp,
		off_t	length,
		struct ucred *	active_cred,
		struct thread *	td
	)

static

Definition at line 159 of file uipc_shm.c.

References shm_dotruncate().

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int shm_unmap	(	struct file *	fp,
		void *	mem,
		size_t	size
	)

Definition at line 824 of file uipc_shm.c.

static int shm_write	(	struct file *	fp,
		struct uio *	uio,
		struct ucred *	active_cred,
		int	flags,
		struct thread *	td
	)

static

Definition at line 151 of file uipc_shm.c.

int sys_shm_open	(	struct thread *	td,
		struct shm_open_args *	uap
	)

Definition at line 525 of file uipc_shm.c.

References falloc(), fd, fdclose(), finit(), free(), malloc(), path, shm_access(), shm_alloc(), shm_dotruncate(), shm_hold(), shm_insert(), and shm_lookup().

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int sys_shm_unlink	(	struct thread *	td,
		struct shm_unlink_args *	uap
	)

Definition at line 655 of file uipc_shm.c.

References free(), malloc(), path, and shm_remove().

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SYSINIT	(	shm_init	,
		SI_SUB_SYSV_SHM	,
		SI_ORDER_ANY	,
		shm_init	,
		NULL
	)

Data Structures

Macros

Functions

Macro Definition Documentation

Function Documentation