uipc_mqueue.c File Reference

#include <sys/cdefs.h>
#include "opt_capsicum.h"
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/limits.h>
#include <sys/malloc.h>
#include <sys/buf.h>
#include <sys/capsicum.h>
#include <sys/dirent.h>
#include <sys/event.h>
#include <sys/eventhandler.h>
#include <sys/fcntl.h>
#include <sys/file.h>
#include <sys/filedesc.h>
#include <sys/jail.h>
#include <sys/lock.h>
#include <sys/module.h>
#include <sys/mount.h>
#include <sys/mqueue.h>
#include <sys/mutex.h>
#include <sys/namei.h>
#include <sys/posix4.h>
#include <sys/poll.h>
#include <sys/priv.h>
#include <sys/proc.h>
#include <sys/queue.h>
#include <sys/sysproto.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/syscallsubr.h>
#include <sys/sysent.h>
#include <sys/sx.h>
#include <sys/sysctl.h>
#include <sys/taskqueue.h>
#include <sys/unistd.h>
#include <sys/user.h>
#include <sys/vnode.h>
#include <machine/atomic.h>
#include <security/audit/audit.h>

Include dependency graph for uipc_mqueue.c:

Go to the source code of this file.

Data Structures
struct	mqfs_info
struct	mqfs_vdata
struct	mqfs_node
struct	mqueue_notifier
struct	mqueue
struct	mqueue_msg

Macros
#define	MQFS_NAMELEN   NAME_MAX
#define	MQFS_DELEN   (8 + MQFS_NAMELEN)
#define	VTON(vp)   (((struct mqfs_vdata *)((vp)->v_data))->mv_node)
#define	VTOMQ(vp)   ((struct mqueue *)(VTON(vp)->mn_data))
#define	VFSTOMQFS(m)   ((struct mqfs_info *)((m)->mnt_data))
#define	FPTOMQ(fp)
#define	MQ_RSEL   0x01
#define	MQ_WSEL   0x02

Typedefs
typedef int(*	_fgetf) (struct thread *, int, cap_rights_t *, struct file **)

Enumerations
enum	mqfs_type_t {   mqfstype_none = 0 , mqfstype_root , mqfstype_dir , mqfstype_this ,   mqfstype_parent , mqfstype_file , mqfstype_symlink }

Functions
	__FBSDID ("$FreeBSD$")
	FEATURE (p1003_1b_mqueue, "POSIX P1003.1B message queues support")
	TAILQ_HEAD (msgq, mqueue_msg)
static	SYSCTL_NODE (_kern, OID_AUTO, mqueue, CTLFLAG_RW|CTLFLAG_MPSAFE, 0, "POSIX real time message queue")
	SYSCTL_INT (_kern_mqueue, OID_AUTO, maxmsg, CTLFLAG_RW, &maxmsg, 0, "Default maximum messages in queue")
	SYSCTL_INT (_kern_mqueue, OID_AUTO, maxmsgsize, CTLFLAG_RW, &maxmsgsize, 0, "Default maximum message size")
	SYSCTL_INT (_kern_mqueue, OID_AUTO, maxmq, CTLFLAG_RW, &maxmq, 0, "maximum message queues")
	SYSCTL_INT (_kern_mqueue, OID_AUTO, curmq, CTLFLAG_RW, &curmq, 0, "current message queue number")
static	MALLOC_DEFINE (M_MQUEUEDATA, "mqdata", "mqueue data")
static struct mqfs_node *	mqfs_create_file (struct mqfs_node *parent, const char *name, int namelen, struct ucred *cred, int mode)
static int	mqfs_destroy (struct mqfs_node *mn)
static void	mqfs_fileno_alloc (struct mqfs_info *mi, struct mqfs_node *mn)
static void	mqfs_fileno_free (struct mqfs_info *mi, struct mqfs_node *mn)
static int	mqfs_allocv (struct mount *mp, struct vnode **vpp, struct mqfs_node *pn)
static int	mqfs_prison_remove (void *obj, void *data)
static struct mqueue *	mqueue_alloc (const struct mq_attr *attr)
static void	mqueue_free (struct mqueue *mq)
static int	mqueue_send (struct mqueue *mq, const char *msg_ptr, size_t msg_len, unsigned msg_prio, int waitok, const struct timespec *abs_timeout)
static int	mqueue_receive (struct mqueue *mq, char *msg_ptr, size_t msg_len, unsigned *msg_prio, int waitok, const struct timespec *abs_timeout)
static int	_mqueue_send (struct mqueue *mq, struct mqueue_msg *msg, int timo)
static int	_mqueue_recv (struct mqueue *mq, struct mqueue_msg **msg, int timo)
static void	mqueue_send_notification (struct mqueue *mq)
static void	mqueue_fdclose (struct thread *td, int fd, struct file *fp)
static void	mq_proc_exit (void *arg, struct proc *p)
static void	filt_mqdetach (struct knote *kn)
static int	filt_mqread (struct knote *kn, long hint)
static int	filt_mqwrite (struct knote *kn, long hint)
static void	mqfs_fileno_init (struct mqfs_info *mi)
static void	mqfs_fileno_uninit (struct mqfs_info *mi)
static __inline struct mqfs_node *	mqnode_alloc (void)
static __inline void	mqnode_free (struct mqfs_node *node)
static __inline void	mqnode_addref (struct mqfs_node *node)
static __inline void	mqnode_release (struct mqfs_node *node)
static int	mqfs_add_node (struct mqfs_node *parent, struct mqfs_node *node)
static struct mqfs_node *	mqfs_create_node (const char *name, int namelen, struct ucred *cred, int mode, int nodetype)
static int	mqfs_fixup_dir (struct mqfs_node *parent)
static int	mqfs_mount (struct mount *mp)
static int	mqfs_unmount (struct mount *mp, int mntflags)
static int	mqfs_root (struct mount *mp, int flags, struct vnode **vpp)
static int	mqfs_statfs (struct mount *mp, struct statfs *sbp)
static int	mqfs_init (struct vfsconf *vfc)
static int	mqfs_uninit (struct vfsconf *vfc)
static void	do_recycle (void *context, int pending __unused)
static struct mqfs_node *	mqfs_search (struct mqfs_node *pd, const char *name, int len, struct ucred *cred)
static int	mqfs_lookupx (struct vop_cachedlookup_args *ap)
static int	mqfs_lookup (struct vop_cachedlookup_args *ap)
static int	mqfs_create (struct vop_create_args *ap)
static int	do_unlink (struct mqfs_node *pn, struct ucred *ucred)
static int	mqfs_remove (struct vop_remove_args *ap)
static int	mqfs_inactive (struct vop_inactive_args *ap)
static int	mqfs_reclaim (struct vop_reclaim_args *ap)
static int	mqfs_open (struct vop_open_args *ap)
static int	mqfs_close (struct vop_close_args *ap)
static int	mqfs_access (struct vop_access_args *ap)
static int	mqfs_getattr (struct vop_getattr_args *ap)
static int	mqfs_setattr (struct vop_setattr_args *ap)
static int	mqfs_read (struct vop_read_args *ap)
static int	mqfs_readdir (struct vop_readdir_args *ap)
static int	mqfs_prison_remove (void *obj, void *data __unused)
static struct mqueue_msg *	mqueue_loadmsg (const char *msg_ptr, size_t msg_size, int msg_prio)
static int	mqueue_savemsg (struct mqueue_msg *msg, char *msg_ptr, int *msg_prio)
static __inline void	mqueue_freemsg (struct mqueue_msg *msg)
static __inline struct mqueue_notifier *	notifier_alloc (void)
static __inline void	notifier_free (struct mqueue_notifier *p)
static struct mqueue_notifier *	notifier_search (struct proc *p, int fd)
static __inline void	notifier_insert (struct proc *p, struct mqueue_notifier *nt)
static __inline void	notifier_delete (struct proc *p, struct mqueue_notifier *nt)
static void	notifier_remove (struct proc *p, struct mqueue *mq, int fd)
static int	kern_kmq_open (struct thread *td, const char *upath, int flags, mode_t mode, const struct mq_attr *attr)
int	sys_kmq_open (struct thread *td, struct kmq_open_args *uap)
int	sys_kmq_unlink (struct thread *td, struct kmq_unlink_args *uap)
static int	_getmq (struct thread *td, int fd, cap_rights_t *rightsp, _fgetf func, struct file **fpp, struct mqfs_node **ppn, struct mqueue **pmq)
static __inline int	getmq (struct thread *td, int fd, struct file **fpp, struct mqfs_node **ppn, struct mqueue **pmq)
static __inline int	getmq_read (struct thread *td, int fd, struct file **fpp, struct mqfs_node **ppn, struct mqueue **pmq)
static __inline int	getmq_write (struct thread *td, int fd, struct file **fpp, struct mqfs_node **ppn, struct mqueue **pmq)
static int	kern_kmq_setattr (struct thread *td, int mqd, const struct mq_attr *attr, struct mq_attr *oattr)
int	sys_kmq_setattr (struct thread *td, struct kmq_setattr_args *uap)
int	sys_kmq_timedreceive (struct thread *td, struct kmq_timedreceive_args *uap)
int	sys_kmq_timedsend (struct thread *td, struct kmq_timedsend_args *uap)
static int	kern_kmq_notify (struct thread *td, int mqd, struct sigevent *sigev)
int	sys_kmq_notify (struct thread *td, struct kmq_notify_args *uap)
static void	mq_proc_exit (void *arg __unused, struct proc *p)
static int	mqf_poll (struct file *fp, int events, struct ucred *active_cred, struct thread *td)
static int	mqf_close (struct file *fp, struct thread *td)
static int	mqf_stat (struct file *fp, struct stat *st, struct ucred *active_cred)
static int	mqf_chmod (struct file *fp, mode_t mode, struct ucred *active_cred, struct thread *td)
static int	mqf_chown (struct file *fp, uid_t uid, gid_t gid, struct ucred *active_cred, struct thread *td)
static int	mqf_kqfilter (struct file *fp, struct knote *kn)
static int	mqf_fill_kinfo (struct file *fp, struct kinfo_file *kif, struct filedesc *fdp)
	VFS_VOP_VECTOR_REGISTER (mqfs_vnodeops)
static int	mqinit (void)
static int	mqunload (void)
static int	mq_modload (struct module *module, int cmd, void *arg)
	DECLARE_MODULE (mqueuefs, mqueuefs_mod, SI_SUB_VFS, SI_ORDER_MIDDLE)
	MODULE_VERSION (mqueuefs, 1)

Variables
static int	default_maxmsg = 10
static int	default_msgsize = 1024
static int	maxmsg = 100
static int	maxmsgsize = 16384
static int	maxmq = 100
static int	curmq = 0
static int	unloadable = 0
static eventhandler_tag	exit_tag
static struct mqfs_info	mqfs_data
static uma_zone_t	mqnode_zone
static uma_zone_t	mqueue_zone
static uma_zone_t	mvdata_zone
static uma_zone_t	mqnoti_zone
static struct vop_vector	mqfs_vnodeops
static struct fileops	mqueueops
static unsigned	mqfs_osd_jail_slot
struct filterops	mq_rfiltops
struct filterops	mq_wfiltops
static struct vfsops	mqfs_vfsops
static struct vfsconf	mqueuefs_vfsconf
static struct syscall_helper_data	mq_syscalls []
static moduledata_t	mqueuefs_mod

Macro Definition Documentation

FPTOMQ

#define FPTOMQ

(

fp

)

Value:

                                ((struct mqueue *)(((struct mqfs_node *) \
                                (fp)->f_data)->mn_data))

Definition at line 163 of file uipc_mqueue.c.

MQ_RSEL

#define MQ_RSEL   0x01

Definition at line 192 of file uipc_mqueue.c.

MQ_WSEL

#define MQ_WSEL   0x02

Definition at line 193 of file uipc_mqueue.c.

MQFS_DELEN

#define MQFS_DELEN   (8 + MQFS_NAMELEN)

Definition at line 104 of file uipc_mqueue.c.

MQFS_NAMELEN

#define MQFS_NAMELEN   NAME_MAX

Definition at line 103 of file uipc_mqueue.c.

VFSTOMQFS

#define VFSTOMQFS

(

m

)

((struct mqfs_info *)((m)->mnt_data))

Definition at line 162 of file uipc_mqueue.c.

VTOMQ

#define VTOMQ

(

vp

)

((struct mqueue *)(VTON(vp)->mn_data))

Definition at line 161 of file uipc_mqueue.c.

VTON

#define VTON

(

vp

)

(((struct mqfs_vdata *)((vp)->v_data))->mv_node)

Definition at line 160 of file uipc_mqueue.c.

Typedef Documentation

_fgetf

typedef int(* _fgetf) (struct thread *, int, cap_rights_t *, struct file **)

Definition at line 2165 of file uipc_mqueue.c.

Enumeration Type Documentation

mqfs_type_t

enum mqfs_type_t

Enumerator
mqfstype_none
mqfstype_root
mqfstype_dir
mqfstype_this
mqfstype_parent
mqfstype_file
mqfstype_symlink

Definition at line 107 of file uipc_mqueue.c.

Function Documentation

__FBSDID()

__FBSDID

(

"$FreeBSD$"

)

_getmq()

static int _getmq ( struct thread *  td, int  fd, cap_rights_t *  rightsp, _fgetf  func, struct file **  fpp, struct mqfs_node **  ppn, struct mqueue **  pmq  )

static

Definition at line 2171 of file uipc_mqueue.c.

References fd, and mqueueops.

Referenced by getmq(), getmq_read(), and getmq_write().

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_mqueue_recv()

static int _mqueue_recv ( struct mqueue *  mq, struct mqueue_msg **  msg, int  timo  )

static

Definition at line 1917 of file uipc_mqueue.c.

References mqueue::mq_curmsgs, mqueue::mq_flags, mqueue::mq_msgq, mqueue::mq_mutex, mqueue::mq_notifier, mqueue::mq_receivers, mqueue::mq_senders, mqueue::mq_totalbytes, mqueue::mq_wsel, MQ_WSEL, mqueue_send_notification(), selwakeup(), and wakeup_one().

Referenced by mqueue_receive().

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_mqueue_send()

static int _mqueue_send ( struct mqueue *  mq, struct mqueue_msg *  msg, int  timo  )

static

Definition at line 1760 of file uipc_mqueue.c.

References mqueue::mq_curmsgs, mqueue::mq_flags, mqueue::mq_maxmsg, mqueue::mq_msgq, mqueue::mq_mutex, mqueue::mq_notifier, mqueue::mq_receivers, mqueue::mq_rsel, MQ_RSEL, mqueue::mq_senders, mqueue::mq_totalbytes, mqueue_send_notification(), selwakeup(), and wakeup_one().

Referenced by mqueue_send().

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DECLARE_MODULE()

DECLARE_MODULE	(	mqueuefs	,
		mqueuefs_mod	,
		SI_SUB_VFS	,
		SI_ORDER_MIDDLE
	)

do_recycle()

static void do_recycle ( void *  context, int pending  __unused  )

static

Definition at line 722 of file uipc_mqueue.c.

References vdrop(), and vrecycle().

Referenced by mqfs_allocv().

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do_unlink()

static int do_unlink ( struct mqfs_node *  pn, struct ucred *  ucred  )

static

Definition at line 1026 of file uipc_mqueue.c.

References cache_purge(), mqfs_info::mi_lock, mqfs_node::mn_info, mqfs_node::mn_parent, mqnode_release(), parent, priv_check_cred(), taskqueue_enqueue(), and vhold().

Referenced by mqfs_prison_remove(), mqfs_remove(), and sys_kmq_unlink().

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FEATURE()

FEATURE	(	p1003_1b_mqueue	,
		"POSIX P1003.1B message queues support"
	)

filt_mqdetach()

static void filt_mqdetach ( struct knote *  kn )

static

Definition at line 2620 of file uipc_mqueue.c.

References FPTOMQ, knlist_remove(), mqueue::mq_rsel, mqueue::mq_wsel, and panic().

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filt_mqread()

static int filt_mqread ( struct knote *  kn, long  hint  )

static

Definition at line 2633 of file uipc_mqueue.c.

References FPTOMQ, mqueue::mq_curmsgs, and mqueue::mq_mutex.

filt_mqwrite()

static int filt_mqwrite ( struct knote *  kn, long  hint  )

static

Definition at line 2642 of file uipc_mqueue.c.

References FPTOMQ, mqueue::mq_curmsgs, mqueue::mq_maxmsg, and mqueue::mq_mutex.

getmq()

static __inline int getmq ( struct thread *  td, int  fd, struct file **  fpp, struct mqfs_node **  ppn, struct mqueue **  pmq  )

static

Definition at line 2193 of file uipc_mqueue.c.

References _getmq(), cap_event_rights, fd, and fget().

Referenced by kern_kmq_notify(), and kern_kmq_setattr().

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getmq_read()

static __inline int getmq_read ( struct thread *  td, int  fd, struct file **  fpp, struct mqfs_node **  ppn, struct mqueue **  pmq  )

static

Definition at line 2202 of file uipc_mqueue.c.

References _getmq(), cap_read_rights, fd, and fget_read().

Referenced by sys_kmq_timedreceive().

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getmq_write()

static __inline int getmq_write ( struct thread *  td, int  fd, struct file **  fpp, struct mqfs_node **  ppn, struct mqueue **  pmq  )

static

Definition at line 2211 of file uipc_mqueue.c.

References _getmq(), cap_write_rights, fd, and fget_write().

Referenced by sys_kmq_timedsend().

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kern_kmq_notify()

static int kern_kmq_notify ( struct thread *  td, int  mqd, struct sigevent *  sigev  )

static

Definition at line 2326 of file uipc_mqueue.c.

References cap_event_rights, getmq(), mqueue::mq_msgq, mqueue::mq_mutex, mqueue::mq_notifier, mqueue::mq_receivers, mqueue_send_notification(), notifier_alloc(), notifier_free(), notifier_insert(), notifier_remove(), notifier_search(), and sigqueue_take().

Referenced by sys_kmq_notify().

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kern_kmq_open()

static int kern_kmq_open ( struct thread *  td, const char *  upath, int  flags, mode_t  mode, const struct mq_attr *  attr  )

static

Definition at line 2010 of file uipc_mqueue.c.

References accmode, fd, fdclose(), finit(), flags, maxmsg, maxmsgsize, mqfs_info::mi_lock, mqfs_info::mi_root, mode, mqfs_create_file(), mqfs_data, MQFS_NAMELEN, mqfs_search(), mqnode_addref(), mqueue_alloc(), mqueue_free(), mqueueops, path, and vaccess().

Referenced by sys_kmq_open().

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kern_kmq_setattr()

static int kern_kmq_setattr ( struct thread *  td, int  mqd, const struct mq_attr *  attr, struct mq_attr *  oattr  )

static

Definition at line 2220 of file uipc_mqueue.c.

References flag, getmq(), mqueue::mq_curmsgs, mqueue::mq_maxmsg, and mqueue::mq_msgsize.

Referenced by sys_kmq_setattr().

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MALLOC_DEFINE()

static MALLOC_DEFINE ( M_MQUEUEDATA  , "mqdata"  , "mqueue data"    )

static

MODULE_VERSION()

MODULE_VERSION	(	mqueuefs	,
		1
	)

mq_modload()

static int mq_modload ( struct module *  module, int  cmd, void *  arg  )

static

Definition at line 2915 of file uipc_mqueue.c.

References mqinit(), mqunload(), and vfs_modevent().

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mq_proc_exit() [1/2]

static void mq_proc_exit ( void *arg  __unused, struct proc *  p  )

static

Definition at line 2475 of file uipc_mqueue.c.

References FPTOMQ, mqueue::mq_mutex, mqueueops, and notifier_remove().

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mq_proc_exit() [2/2]

static void mq_proc_exit ( void *  arg, struct proc *  p  )

static

Referenced by mqfs_init().

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mqf_chmod()

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

static

Definition at line 2558 of file uipc_mqueue.c.

References mqfs_info::mi_lock, mode, mqfs_data, and vaccess().

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mqf_chown()

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

static

Definition at line 2578 of file uipc_mqueue.c.

References groupmember(), mqfs_info::mi_lock, mqfs_data, and priv_check_cred().

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mqf_close()

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

static

Definition at line 2526 of file uipc_mqueue.c.

References badfileops, mqfs_info::mi_lock, mqfs_data, and mqnode_release().

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mqf_fill_kinfo()

static int mqf_fill_kinfo ( struct file *  fp, struct kinfo_file *  kif, struct filedesc *  fdp  )

static

Definition at line 2651 of file uipc_mqueue.c.

mqf_kqfilter()

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

static

Definition at line 2603 of file uipc_mqueue.c.

References FPTOMQ, knlist_add(), mq_rfiltops, mqueue::mq_rsel, mq_wfiltops, and mqueue::mq_wsel.

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mqf_poll()

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

static

Definition at line 2498 of file uipc_mqueue.c.

References FPTOMQ, mqueue::mq_curmsgs, mqueue::mq_flags, mqueue::mq_maxmsg, mqueue::mq_mutex, mqueue::mq_rsel, MQ_RSEL, mqueue::mq_wsel, MQ_WSEL, and selrecord().

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mqf_stat()

static int mqf_stat ( struct file *  fp, struct stat *  st, struct ucred *  active_cred  )

static

Definition at line 2540 of file uipc_mqueue.c.

References mqfs_info::mi_lock, mqfs_data, and st.

mqfs_access()

static int mqfs_access ( struct vop_access_args *  ap )

static

Definition at line 1171 of file uipc_mqueue.c.

References vaccess().

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mqfs_add_node()

static int mqfs_add_node ( struct mqfs_node *  parent, struct mqfs_node *  node  )

static

Definition at line 426 of file uipc_mqueue.c.

References mqfs_node::mn_info, mqfs_node::mn_parent, mqfstype_dir, mqfstype_root, mqnode_addref(), and parent.

Referenced by mqfs_create_file(), and mqfs_fixup_dir().

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mqfs_allocv()

static int mqfs_allocv ( struct mount *  mp, struct vnode **  vpp, struct mqfs_node *  pn  )

static

Definition at line 736 of file uipc_mqueue.c.

References do_recycle(), getnewvnode(), insmntque(), mqfs_info::mi_lock, mqfs_node::mn_info, mqfs_node::mn_name, mqfs_vnodeops, mqfstype_dir, mqfstype_file, mqfstype_none, mqfstype_parent, mqfstype_root, mqfstype_symlink, mqfstype_this, mqnode_addref(), mvdata_zone, panic(), vdrop(), vget(), vgone(), vhold(), and vput().

Referenced by mqfs_create(), mqfs_lookupx(), and mqfs_root().

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mqfs_close()

static int mqfs_close ( struct vop_close_args *  ap )

static

Definition at line 1152 of file uipc_mqueue.c.

mqfs_create()

static int mqfs_create ( struct vop_create_args *  ap )

static

Definition at line 984 of file uipc_mqueue.c.

References mqfs_info::mi_lock, mqfs_allocv(), mqfs_create_file(), mqfs_destroy(), mqfstype_dir, mqfstype_root, mqnode_addref(), mqnode_release(), mqueue_alloc(), mqueue_free(), panic(), VFSTOMQFS, and VTON.

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mqfs_create_file()

static struct mqfs_node * mqfs_create_file ( struct mqfs_node *  parent, const char *  name, int  namelen, struct ucred *  cred, int  mode  )

static

Definition at line 468 of file uipc_mqueue.c.

References mode, mqfs_add_node(), mqfs_create_node(), mqfstype_file, mqnode_free(), name, and parent.

Referenced by kern_kmq_open(), and mqfs_create().

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mqfs_create_node()

static struct mqfs_node * mqfs_create_node ( const char *  name, int  namelen, struct ucred *  cred, int  mode, int  nodetype  )

static

Definition at line 445 of file uipc_mqueue.c.

References mqfs_node::mn_name, mode, mqnode_alloc(), name, and vfs_timestamp().

Referenced by mqfs_create_file(), and mqfs_init().

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mqfs_destroy()

static int mqfs_destroy ( struct mqfs_node *  mn )

static

Definition at line 558 of file uipc_mqueue.c.

References mqfs_node::mn_info, mqfs_node::mn_parent, mqfs_destroy(), mqfs_fileno_free(), mqfstype_dir, mqfstype_root, mqnode_free(), mqueue_free(), and parent.

Referenced by mqfs_create(), mqfs_destroy(), mqfs_uninit(), and mqnode_release().

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mqfs_fileno_alloc()

static void mqfs_fileno_alloc ( struct mqfs_info *  mi, struct mqfs_node *  mn  )

static

Definition at line 319 of file uipc_mqueue.c.

References alloc_unr(), mqfs_info::mi_root, mqfs_info::mi_unrhdr, mqfs_node::mn_parent, mqfs_fileno_alloc(), mqfstype_dir, mqfstype_file, mqfstype_parent, mqfstype_root, mqfstype_symlink, and mqfstype_this.

Referenced by mqfs_fileno_alloc(), mqfs_init(), and mqfs_readdir().

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mqfs_fileno_free()

static void mqfs_fileno_free ( struct mqfs_info *  mi, struct mqfs_node *  mn  )

static

Definition at line 360 of file uipc_mqueue.c.

References free_unr(), mqfs_info::mi_unrhdr, mqfstype_dir, mqfstype_file, mqfstype_parent, mqfstype_root, mqfstype_symlink, and mqfstype_this.

Referenced by mqfs_destroy().

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mqfs_fileno_init()

static void mqfs_fileno_init ( struct mqfs_info *  mi )

static

Definition at line 294 of file uipc_mqueue.c.

References mqfs_info::mi_unrhdr, and new_unrhdr().

Referenced by mqfs_init().

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mqfs_fileno_uninit()

static void mqfs_fileno_uninit ( struct mqfs_info *  mi )

static

Definition at line 306 of file uipc_mqueue.c.

References delete_unrhdr(), and mqfs_info::mi_unrhdr.

Referenced by mqfs_uninit().

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mqfs_fixup_dir()

static int mqfs_fixup_dir ( struct mqfs_node *  parent )

static

Definition at line 485 of file uipc_mqueue.c.

References mqfs_node::mn_name, mqfs_add_node(), mqfstype_parent, mqfstype_this, mqnode_alloc(), mqnode_free(), and parent.

Referenced by mqfs_init().

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mqfs_getattr()

static int mqfs_getattr ( struct vop_getattr_args *  ap )

static

Definition at line 1198 of file uipc_mqueue.c.

References VTON.

mqfs_inactive()

static int mqfs_inactive ( struct vop_inactive_args *  ap )

static

Definition at line 1089 of file uipc_mqueue.c.

References vrecycle(), and VTON.

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mqfs_init()

static int mqfs_init ( struct vfsconf *  vfc )

static

Definition at line 657 of file uipc_mqueue.c.

References exit_tag, mqfs_info::mi_lock, mqfs_info::mi_root, mqfs_node::mn_info, mq_fdclose, mq_proc_exit(), mqfs_create_node(), mqfs_data, mqfs_fileno_alloc(), mqfs_fileno_init(), mqfs_fixup_dir(), mqfs_osd_jail_slot, mqfs_prison_remove(), mqfstype_root, mqnode_zone, mqnoti_zone, mqueue_fdclose(), mqueue_zone, mvdata_zone, and p31b_setcfg().

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mqfs_lookup()

static int mqfs_lookup ( struct vop_cachedlookup_args *  ap )

static

Definition at line 963 of file uipc_mqueue.c.

References mqfs_lookupx().

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mqfs_lookupx()

static int mqfs_lookupx ( struct vop_cachedlookup_args *  ap )

static

Definition at line 845 of file uipc_mqueue.c.

References flags, mqfs_info::mi_lock, mqfs_node::mn_info, mqfs_node::mn_parent, mqfs_allocv(), MQFS_NAMELEN, mqfs_search(), mqnode_addref(), mqnode_release(), and VTON.

Referenced by mqfs_lookup().

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mqfs_mount()

static int mqfs_mount ( struct mount *  mp )

static

Definition at line 591 of file uipc_mqueue.c.

References mqfs_data, vfs_getnewfsid(), and vfs_mountedfrom().

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mqfs_open()

static int mqfs_open ( struct vop_open_args *  ap )

static

Definition at line 1136 of file uipc_mqueue.c.

mqfs_prison_remove() [1/2]

static int mqfs_prison_remove ( void *  obj, void *data  __unused  )

static

Definition at line 1562 of file uipc_mqueue.c.

References allprison, do_unlink(), mqfs_info::mi_lock, mqfs_info::mi_root, mqfs_data, and pr.

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mqfs_prison_remove() [2/2]

static int mqfs_prison_remove ( void *  obj, void *  data  )

static

Referenced by mqfs_init().

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mqfs_read()

static int mqfs_read ( struct vop_read_args *  ap )

static

Definition at line 1340 of file uipc_mqueue.c.

References buf, mqueue::mq_curmsgs, mqueue::mq_maxmsg, mqueue::mq_msgsize, mqueue::mq_totalbytes, snprintf(), uiomove_frombuf(), and VTOMQ.

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mqfs_readdir()

static int mqfs_readdir ( struct vop_readdir_args *  ap )

static

Definition at line 1380 of file uipc_mqueue.c.

References mqfs_info::mi_lock, mqfs_node::mn_name, mqfs_fileno_alloc(), MQFS_NAMELEN, mqfstype_dir, mqfstype_file, mqfstype_parent, mqfstype_root, mqfstype_symlink, mqfstype_this, panic(), vfs_read_dirent(), VFSTOMQFS, and VTON.

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mqfs_reclaim()

static int mqfs_reclaim ( struct vop_reclaim_args *  ap )

static

Definition at line 1106 of file uipc_mqueue.c.

References mqfs_info::mi_lock, mqnode_release(), mvdata_zone, and VFSTOMQFS.

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mqfs_remove()

static int mqfs_remove ( struct vop_remove_args *  ap )

static

Definition at line 1066 of file uipc_mqueue.c.

References do_unlink(), mqfs_info::mi_lock, VFSTOMQFS, and VTON.

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mqfs_root()

static int mqfs_root ( struct mount *  mp, int  flags, struct vnode **  vpp  )

static

Definition at line 633 of file uipc_mqueue.c.

References mqfs_info::mi_root, mqfs_allocv(), and VFSTOMQFS.

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mqfs_search()

static struct mqfs_node * mqfs_search ( struct mqfs_node *  pd, const char *  name, int  len, struct ucred *  cred  )

static

Definition at line 824 of file uipc_mqueue.c.

References mqfs_info::mi_lock, mqfs_node::mn_info, mqfs_node::mn_name, and name.

Referenced by kern_kmq_open(), mqfs_lookupx(), and sys_kmq_unlink().

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mqfs_setattr()

static int mqfs_setattr ( struct vop_setattr_args *  ap )

static

Definition at line 1239 of file uipc_mqueue.c.

References groupmember(), priv_check(), vfs_timestamp(), and VTON.

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mqfs_statfs()

static int mqfs_statfs ( struct mount *  mp, struct statfs *  sbp  )

static

Definition at line 647 of file uipc_mqueue.c.

mqfs_uninit()

static int mqfs_uninit ( struct vfsconf *  vfc )

static

Definition at line 698 of file uipc_mqueue.c.

References exit_tag, mqfs_info::mi_lock, mqfs_info::mi_root, mqfs_data, mqfs_destroy(), mqfs_fileno_uninit(), mqfs_osd_jail_slot, mqnode_zone, mqnoti_zone, mqueue_zone, mvdata_zone, sx_destroy(), and unloadable.

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mqfs_unmount()

static int mqfs_unmount ( struct mount *  mp, int  mntflags  )

static

Definition at line 620 of file uipc_mqueue.c.

References vflush().

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mqinit()

static int mqinit ( void  )

static

Definition at line 2888 of file uipc_mqueue.c.

References mq_syscalls, and syscall_helper_register().

Referenced by mq_modload().

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mqnode_addref()

static __inline void mqnode_addref ( struct mqfs_node *  node )

static

Definition at line 394 of file uipc_mqueue.c.

Referenced by kern_kmq_open(), mqfs_add_node(), mqfs_allocv(), mqfs_create(), and mqfs_lookupx().

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mqnode_alloc()

static __inline struct mqfs_node * mqnode_alloc ( void  )

static

Definition at line 382 of file uipc_mqueue.c.

References mqnode_zone.

Referenced by mqfs_create_node(), and mqfs_fixup_dir().

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mqnode_free()

static __inline void mqnode_free ( struct mqfs_node *  node )

static

Definition at line 388 of file uipc_mqueue.c.

References mqnode_zone.

Referenced by mqfs_create_file(), mqfs_destroy(), and mqfs_fixup_dir().

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mqnode_release()

static __inline void mqnode_release ( struct mqfs_node *  node )

static

Definition at line 400 of file uipc_mqueue.c.

References mqfs_info::mi_lock, mqfs_node::mn_info, mqfs_destroy(), mqfstype_dir, and mqfstype_root.

Referenced by do_unlink(), mqf_close(), mqfs_create(), mqfs_lookupx(), and mqfs_reclaim().

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mqueue_alloc()

static struct mqueue * mqueue_alloc ( const struct mq_attr *  attr )

static

Definition at line 1594 of file uipc_mqueue.c.

References curmq, default_maxmsg, default_msgsize, knlist_init_mtx(), maxmq, mqueue::mq_maxmsg, mqueue::mq_msgq, mqueue::mq_msgsize, mqueue::mq_mutex, mqueue::mq_rsel, mqueue::mq_wsel, and mqueue_zone.

Referenced by kern_kmq_open(), and mqfs_create().

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mqueue_fdclose()

static void mqueue_fdclose ( struct thread *  td, int  fd, struct file *  fp  )

static

Definition at line 2446 of file uipc_mqueue.c.

References fd, FPTOMQ, mqueue::mq_flags, mqueue::mq_mutex, mqueue::mq_rsel, MQ_RSEL, mqueue::mq_wsel, MQ_WSEL, mqueueops, notifier_remove(), and selwakeup().

Referenced by mqfs_init().

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mqueue_free()

static void mqueue_free ( struct mqueue *  mq )

static

Definition at line 1620 of file uipc_mqueue.c.

References curmq, free(), knlist_destroy(), mqueue::mq_msgq, mqueue::mq_mutex, mqueue::mq_rsel, mqueue::mq_wsel, mqueue_zone, and seldrain().

Referenced by kern_kmq_open(), mqfs_create(), and mqfs_destroy().

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mqueue_freemsg()

static __inline void mqueue_freemsg ( struct mqueue_msg *  msg )

static

Definition at line 1681 of file uipc_mqueue.c.

References free().

Referenced by mqueue_receive(), and mqueue_send().

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mqueue_loadmsg()

static struct mqueue_msg * mqueue_loadmsg ( const char *  msg_ptr, size_t  msg_size, int  msg_prio  )

static

Definition at line 1642 of file uipc_mqueue.c.

References free(), and malloc().

Referenced by mqueue_send().

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mqueue_receive()

int mqueue_receive ( struct mqueue *  mq, char *  msg_ptr, size_t  msg_len, unsigned *  msg_prio, int  waitok, const struct timespec *  abs_timeout  )

static

Definition at line 1847 of file uipc_mqueue.c.

References _mqueue_recv(), getnanotime(), mqueue_freemsg(), mqueue_savemsg(), ts, and tvtohz().

Referenced by sys_kmq_timedreceive().

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mqueue_savemsg()

static int mqueue_savemsg ( struct mqueue_msg *  msg, char *  msg_ptr, int *  msg_prio  )

static

Definition at line 1666 of file uipc_mqueue.c.

Referenced by mqueue_receive().

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mqueue_send()

int mqueue_send ( struct mqueue *  mq, const char *  msg_ptr, size_t  msg_len, unsigned  msg_prio, int  waitok, const struct timespec *  abs_timeout  )

static

Definition at line 1692 of file uipc_mqueue.c.

References _mqueue_send(), getnanotime(), mqueue::mq_msgsize, mqueue_freemsg(), mqueue_loadmsg(), ts, and tvtohz().

Referenced by sys_kmq_timedsend().

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mqueue_send_notification()

static void mqueue_send_notification ( struct mqueue *  mq )

static

Definition at line 1816 of file uipc_mqueue.c.

References mqueue::mq_mutex, mqueue::mq_notifier, sigev_findtd(), and tdsendsignal().

Referenced by _mqueue_recv(), _mqueue_send(), and kern_kmq_notify().

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mqunload()

static int mqunload ( void  )

static

Definition at line 2904 of file uipc_mqueue.c.

References mq_syscalls, and syscall_helper_unregister().

Referenced by mq_modload().

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notifier_alloc()

static __inline struct mqueue_notifier * notifier_alloc ( void  )

static

Definition at line 1956 of file uipc_mqueue.c.

References mqnoti_zone.

Referenced by kern_kmq_notify().

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notifier_delete()

static __inline void notifier_delete ( struct proc *  p, struct mqueue_notifier *  nt  )

static

Definition at line 1986 of file uipc_mqueue.c.

References notifier_free().

Referenced by notifier_remove().

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notifier_free()

static __inline void notifier_free ( struct mqueue_notifier *  p )

static

Definition at line 1962 of file uipc_mqueue.c.

References mqnoti_zone.

Referenced by kern_kmq_notify(), and notifier_delete().

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notifier_insert()

static __inline void notifier_insert ( struct proc *  p, struct mqueue_notifier *  nt  )

static

Definition at line 1980 of file uipc_mqueue.c.

Referenced by kern_kmq_notify().

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notifier_remove()

static void notifier_remove ( struct proc *  p, struct mqueue *  mq, int  fd  )

static

Definition at line 1993 of file uipc_mqueue.c.

References fd, mqueue::mq_mutex, mqueue::mq_notifier, notifier_delete(), notifier_search(), and sigqueue_take().

Referenced by kern_kmq_notify(), mq_proc_exit(), and mqueue_fdclose().

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notifier_search()

static struct mqueue_notifier * notifier_search ( struct proc *  p, int  fd  )

static

Definition at line 1968 of file uipc_mqueue.c.

References fd.

Referenced by kern_kmq_notify(), and notifier_remove().

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sys_kmq_notify()

int sys_kmq_notify	(	struct thread *	td,
		struct kmq_notify_args *	uap
	)

Definition at line 2429 of file uipc_mqueue.c.

References ev, and kern_kmq_notify().

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sys_kmq_open()

int sys_kmq_open	(	struct thread *	td,
		struct kmq_open_args *	uap
	)

Definition at line 2117 of file uipc_mqueue.c.

References flags, and kern_kmq_open().

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sys_kmq_setattr()

int sys_kmq_setattr	(	struct thread *	td,
		struct kmq_setattr_args *	uap
	)

Definition at line 2251 of file uipc_mqueue.c.

References kern_kmq_setattr().

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sys_kmq_timedreceive()

int sys_kmq_timedreceive	(	struct thread *	td,
		struct kmq_timedreceive_args *	uap
	)

Definition at line 2271 of file uipc_mqueue.c.

References getmq_read(), and mqueue_receive().

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sys_kmq_timedsend()

int sys_kmq_timedsend	(	struct thread *	td,
		struct kmq_timedsend_args *	uap
	)

Definition at line 2299 of file uipc_mqueue.c.

References getmq_write(), and mqueue_send().

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sys_kmq_unlink()

int sys_kmq_unlink	(	struct thread *	td,
		struct kmq_unlink_args *	uap
	)

Definition at line 2138 of file uipc_mqueue.c.

References do_unlink(), mqfs_info::mi_lock, mqfs_info::mi_root, mqfs_data, MQFS_NAMELEN, mqfs_search(), and path.

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SYSCTL_INT() [1/4]

SYSCTL_INT	(	_kern_mqueue	,
		OID_AUTO	,
		curmq	,
		CTLFLAG_RW	,
		&	curmq,
		0	,
		"current message queue number"
	)

SYSCTL_INT() [2/4]

SYSCTL_INT	(	_kern_mqueue	,
		OID_AUTO	,
		maxmq	,
		CTLFLAG_RW	,
		&	maxmq,
		0	,
		"maximum message queues"
	)

SYSCTL_INT() [3/4]

SYSCTL_INT	(	_kern_mqueue	,
		OID_AUTO	,
		maxmsg	,
		CTLFLAG_RW	,
		&	maxmsg,
		0	,
		"Default maximum messages in queue"
	)

SYSCTL_INT() [4/4]

SYSCTL_INT	(	_kern_mqueue	,
		OID_AUTO	,
		maxmsgsize	,
		CTLFLAG_RW	,
		&	maxmsgsize,
		0	,
		"Default maximum message size"
	)

SYSCTL_NODE()

static SYSCTL_NODE ( _kern  , OID_AUTO  , mqueue  , CTLFLAG_RW|  CTLFLAG_MPSAFE, 0  , "POSIX real time message queue"    )

static

TAILQ_HEAD()

TAILQ_HEAD	(	msgq	,
		mqueue_msg
	)

VFS_VOP_VECTOR_REGISTER()

VFS_VOP_VECTOR_REGISTER

(

mqfs_vnodeops

)

Variable Documentation

curmq

int curmq = 0

static

Definition at line 217 of file uipc_mqueue.c.

Referenced by mqueue_alloc(), and mqueue_free().

default_maxmsg

int default_maxmsg = 10

static

Definition at line 205 of file uipc_mqueue.c.

Referenced by mqueue_alloc().

default_msgsize

int default_msgsize = 1024

static

Definition at line 206 of file uipc_mqueue.c.

Referenced by mqueue_alloc().

exit_tag

eventhandler_tag exit_tag

static

Definition at line 223 of file uipc_mqueue.c.

Referenced by mqfs_init(), and mqfs_uninit().

maxmq

int maxmq = 100

static

Definition at line 214 of file uipc_mqueue.c.

Referenced by mqueue_alloc().

maxmsg

int maxmsg = 100

static

Definition at line 208 of file uipc_mqueue.c.

Referenced by kern_kmq_open().

maxmsgsize

int maxmsgsize = 16384

static

Definition at line 211 of file uipc_mqueue.c.

Referenced by kern_kmq_open().

mq_rfiltops

struct filterops mq_rfiltops

Initial value:

= {
        .f_isfd = 1,
        .f_detach = filt_mqdetach,
        .f_event = filt_mqread,
}

Definition at line 279 of file uipc_mqueue.c.

Referenced by mqf_kqfilter().

mq_syscalls

struct syscall_helper_data mq_syscalls[]

static

Initial value:

= {
        SYSCALL_INIT_HELPER(kmq_open),
        SYSCALL_INIT_HELPER_F(kmq_setattr, SYF_CAPENABLED),
        SYSCALL_INIT_HELPER_F(kmq_timedsend, SYF_CAPENABLED),
        SYSCALL_INIT_HELPER_F(kmq_timedreceive, SYF_CAPENABLED),
        SYSCALL_INIT_HELPER_F(kmq_notify, SYF_CAPENABLED),
        SYSCALL_INIT_HELPER(kmq_unlink),
        SYSCALL_INIT_LAST
}

Definition at line 2712 of file uipc_mqueue.c.

Referenced by mqinit(), and mqunload().

mq_wfiltops

struct filterops mq_wfiltops

Initial value:

= {
        .f_isfd = 1,
        .f_detach = filt_mqdetach,
        .f_event = filt_mqwrite,
}

Definition at line 284 of file uipc_mqueue.c.

Referenced by mqf_kqfilter().

mqfs_data

struct mqfs_info mqfs_data

static

Definition at line 226 of file uipc_mqueue.c.

Referenced by kern_kmq_open(), mqf_chmod(), mqf_chown(), mqf_close(), mqf_stat(), mqfs_init(), mqfs_mount(), mqfs_prison_remove(), mqfs_uninit(), and sys_kmq_unlink().

mqfs_osd_jail_slot

unsigned mqfs_osd_jail_slot

static

Definition at line 233 of file uipc_mqueue.c.

Referenced by mqfs_init(), and mqfs_uninit().

mqfs_vfsops

struct vfsops mqfs_vfsops

static

Initial value:

= {
        .vfs_init               = mqfs_init,
        .vfs_uninit             = mqfs_uninit,
        .vfs_mount              = mqfs_mount,
        .vfs_unmount            = mqfs_unmount,
        .vfs_root               = mqfs_root,
        .vfs_statfs             = mqfs_statfs,
}

Definition at line 2695 of file uipc_mqueue.c.

mqfs_vnodeops

static struct vop_vector mqfs_vnodeops

static

Initial value:

= {
        .vop_default            = &default_vnodeops,
        .vop_access             = mqfs_access,
        .vop_cachedlookup       = mqfs_lookup,
        .vop_lookup             = vfs_cache_lookup,
        .vop_reclaim            = mqfs_reclaim,
        .vop_create             = mqfs_create,
        .vop_remove             = mqfs_remove,
        .vop_inactive           = mqfs_inactive,
        .vop_open               = mqfs_open,
        .vop_close              = mqfs_close,
        .vop_getattr            = mqfs_getattr,
        .vop_setattr            = mqfs_setattr,
        .vop_read               = mqfs_read,
        .vop_write              = VOP_EOPNOTSUPP,
        .vop_readdir            = mqfs_readdir,
        .vop_mkdir              = VOP_EOPNOTSUPP,
        .vop_rmdir              = VOP_EOPNOTSUPP
}

Definition at line 231 of file uipc_mqueue.c.

Referenced by mqfs_allocv().

mqnode_zone

uma_zone_t mqnode_zone

static

Definition at line 227 of file uipc_mqueue.c.

Referenced by mqfs_init(), mqfs_uninit(), mqnode_alloc(), and mqnode_free().

mqnoti_zone

uma_zone_t mqnoti_zone

static

Definition at line 230 of file uipc_mqueue.c.

Referenced by mqfs_init(), mqfs_uninit(), notifier_alloc(), and notifier_free().

mqueue_zone

uma_zone_t mqueue_zone

static

Definition at line 228 of file uipc_mqueue.c.

Referenced by mqfs_init(), mqfs_uninit(), mqueue_alloc(), and mqueue_free().

mqueuefs_mod

moduledata_t mqueuefs_mod

static

Initial value:

= {
        "mqueuefs",
        mq_modload,
        &mqueuefs_vfsconf
}

Definition at line 2938 of file uipc_mqueue.c.

mqueuefs_vfsconf

struct vfsconf mqueuefs_vfsconf

static

Initial value:

= {
        .vfc_version = VFS_VERSION,
        .vfc_name = "mqueuefs",
        .vfc_vfsops = &mqfs_vfsops,
        .vfc_typenum = -1,
        .vfc_flags = VFCF_SYNTHETIC
}

Definition at line 2704 of file uipc_mqueue.c.

mqueueops

static struct fileops mqueueops

static

Initial value:

= {
        .fo_read                = invfo_rdwr,
        .fo_write               = invfo_rdwr,
        .fo_truncate            = invfo_truncate,
        .fo_ioctl               = invfo_ioctl,
        .fo_poll                = mqf_poll,
        .fo_kqfilter            = mqf_kqfilter,
        .fo_stat                = mqf_stat,
        .fo_close               = mqf_close,
        .fo_chmod               = mqf_chmod,
        .fo_chown               = mqf_chown,
        .fo_sendfile            = invfo_sendfile,
        .fo_fill_kinfo          = mqf_fill_kinfo,
        .fo_flags               = DFLAG_PASSABLE,
}

Definition at line 232 of file uipc_mqueue.c.

Referenced by _getmq(), kern_kmq_open(), mq_proc_exit(), and mqueue_fdclose().

mvdata_zone

uma_zone_t mvdata_zone

static

Definition at line 229 of file uipc_mqueue.c.

Referenced by mqfs_allocv(), mqfs_init(), mqfs_reclaim(), and mqfs_uninit().

unloadable

int unloadable = 0

static

Definition at line 220 of file uipc_mqueue.c.

Referenced by accept_filt_generic_mod_event(), and mqfs_uninit().