Differential D19330 Diff 54559 head/sys/kern/uipc_shm.c

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head/sys/kern/uipc_shm.c

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#include "opt_ktrace.h"		#include "opt_ktrace.h"

#include <sys/param.h>		#include <sys/param.h>
#include <sys/capsicum.h>		#include <sys/capsicum.h>
#include <sys/conf.h>		#include <sys/conf.h>
#include <sys/fcntl.h>		#include <sys/fcntl.h>
#include <sys/file.h>		#include <sys/file.h>
#include <sys/filedesc.h>		#include <sys/filedesc.h>
		#include <sys/filio.h>
#include <sys/fnv_hash.h>		#include <sys/fnv_hash.h>
#include <sys/kernel.h>		#include <sys/kernel.h>
#include <sys/uio.h>		#include <sys/uio.h>
#include <sys/signal.h>		#include <sys/signal.h>
#include <sys/jail.h>		#include <sys/jail.h>
#include <sys/ktrace.h>		#include <sys/ktrace.h>
#include <sys/lock.h>		#include <sys/lock.h>
#include <sys/malloc.h>		#include <sys/malloc.h>
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static void shm_init(void *arg);		static void shm_init(void *arg);
static void shm_insert(char path, Fnv32_t fnv, struct shmfd shmfd);		static void shm_insert(char path, Fnv32_t fnv, struct shmfd shmfd);
static struct shmfd shm_lookup(char path, Fnv32_t fnv);		static struct shmfd shm_lookup(char path, Fnv32_t fnv);
static int shm_remove(char path, Fnv32_t fnv, struct ucred ucred);		static int shm_remove(char path, Fnv32_t fnv, struct ucred ucred);

static fo_rdwr_t shm_read;		static fo_rdwr_t shm_read;
static fo_rdwr_t shm_write;		static fo_rdwr_t shm_write;
static fo_truncate_t shm_truncate;		static fo_truncate_t shm_truncate;
		static fo_ioctl_t shm_ioctl;
static fo_stat_t shm_stat;		static fo_stat_t shm_stat;
static fo_close_t shm_close;		static fo_close_t shm_close;
static fo_chmod_t shm_chmod;		static fo_chmod_t shm_chmod;
static fo_chown_t shm_chown;		static fo_chown_t shm_chown;
static fo_seek_t shm_seek;		static fo_seek_t shm_seek;
static fo_fill_kinfo_t shm_fill_kinfo;		static fo_fill_kinfo_t shm_fill_kinfo;
static fo_mmap_t shm_mmap;		static fo_mmap_t shm_mmap;

/* File descriptor operations. */		/* File descriptor operations. */
struct fileops shm_ops = {		struct fileops shm_ops = {
.fo_read = shm_read,		.fo_read = shm_read,
.fo_write = shm_write,		.fo_write = shm_write,
.fo_truncate = shm_truncate,		.fo_truncate = shm_truncate,
.fo_ioctl = invfo_ioctl,		.fo_ioctl = shm_ioctl,
.fo_poll = invfo_poll,		.fo_poll = invfo_poll,
.fo_kqfilter = invfo_kqfilter,		.fo_kqfilter = invfo_kqfilter,
.fo_stat = shm_stat,		.fo_stat = shm_stat,
.fo_close = shm_close,		.fo_close = shm_close,
.fo_chmod = shm_chmod,		.fo_chmod = shm_chmod,
.fo_chown = shm_chown,		.fo_chown = shm_chown,
.fo_sendfile = vn_sendfile,		.fo_sendfile = vn_sendfile,
.fo_seek = shm_seek,		.fo_seek = shm_seek,
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shmfd = fp->f_data;		shmfd = fp->f_data;
#ifdef MAC		#ifdef MAC
error = mac_posixshm_check_truncate(active_cred, fp->f_cred, shmfd);		error = mac_posixshm_check_truncate(active_cred, fp->f_cred, shmfd);
if (error)		if (error)
return (error);		return (error);
#endif		#endif
return (shm_dotruncate(shmfd, length));		return (shm_dotruncate(shmfd, length));
		}

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

		switch (com) {
		case FIONBIO:
		case FIOASYNC:
		/*
		* Allow fcntl(fd, F_SETFL, O_NONBLOCK) to work,
		* just like it would on an unlinked regular file
		*/
		return (0);
		default:
		return (ENOTTY);
		}
}		}

static int		static int
shm_stat(struct file fp, struct stat sb, struct ucred *active_cred,		shm_stat(struct file fp, struct stat sb, struct ucred *active_cred,
struct thread *td)		struct thread *td)
{		{
struct shmfd *shmfd;		struct shmfd *shmfd;
#ifdef MAC		#ifdef MAC
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