xnu-1228.15.4.tar.gz

[apple/xnu.git] / bsd / kern / sys_pipe.c

diff --git a/bsd/kern/sys_pipe.c b/bsd/kern/sys_pipe.c
index f7c0fa30cbaf2b176eaae1b0a8aed99109fe164d..3190f00f1c688b1422841d1f3bc9d6db70b97f7e 100644 (file)
--- a/bsd/kern/sys_pipe.c
+++ b/bsd/kern/sys_pipe.c
@@ -17,7 +17,7 @@
  *    are met.
  */
 /*
  *    are met.
  */
 /*

- * Copyright (c) 2003-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2003-2007 Apple Inc. All rights reserved.

  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 


@@ -43,6 +43,12 @@
  * 
  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
  * 
  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */

+/*
+ * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
+ * support for mandatory and extensible security protections.  This notice
+ * is included in support of clause 2.2 (b) of the Apple Public License,
+ * Version 2.0.
+ */

 
 /*
  * This file contains a high-performance replacement for the socket-based
 
 /*
  * This file contains a high-performance replacement for the socket-based


@@ -111,6 +117,7 @@
 #include <sys/signalvar.h>
 #include <sys/pipe.h>
 #include <sys/sysproto.h>
 #include <sys/signalvar.h>
 #include <sys/pipe.h>
 #include <sys/sysproto.h>

+#include <sys/proc_info.h>

 
 #include <bsm/audit_kernel.h>
 
 
 #include <bsm/audit_kernel.h>
 


@@ -156,18 +163,21 @@
  * interfaces to the outside world
  */
 static int pipe_read(struct fileproc *fp, struct uio *uio,
  * interfaces to the outside world
  */
 static int pipe_read(struct fileproc *fp, struct uio *uio,

-                kauth_cred_t cred, int flags, struct proc *p);
+                int flags, vfs_context_t ctx);

 
 static int pipe_write(struct fileproc *fp, struct uio *uio,
 
 static int pipe_write(struct fileproc *fp, struct uio *uio,

-                kauth_cred_t cred, int flags, struct proc *p);
+                int flags, vfs_context_t ctx);

 
 

-static int pipe_close(struct fileglob *fg, struct proc *p);
+static int pipe_close(struct fileglob *fg, vfs_context_t ctx);

 
 

-static int pipe_select(struct fileproc *fp, int which, void * wql, struct proc *p);
+static int pipe_select(struct fileproc *fp, int which, void * wql,
+               vfs_context_t ctx);

 
 

-static int pipe_kqfilter(struct fileproc *fp, struct knote *kn, struct proc *p);
+static int pipe_kqfilter(struct fileproc *fp, struct knote *kn,
+               vfs_context_t ctx);

 
 

-static int pipe_ioctl(struct fileproc *fp, u_long cmd, caddr_t data, struct proc *p);
+static int pipe_ioctl(struct fileproc *fp, u_long cmd, caddr_t data,
+               vfs_context_t ctx);

 
 
 struct  fileops pipeops =
 
 
 struct  fileops pipeops =


@@ -177,7 +187,7 @@ struct  fileops pipeops =
     pipe_select,
     pipe_close,
     pipe_kqfilter,
     pipe_select,
     pipe_close,
     pipe_kqfilter,

-    0 };
+    NULL };

 
 
 static void    filt_pipedetach(struct knote *kn);
 
 
 static void    filt_pipedetach(struct knote *kn);


@@ -228,7 +238,6 @@ SYSCTL_INT(_kern_ipc, OID_AUTO, pipekvawired, CTLFLAG_RD,
           &amountpipekvawired, 0, "Pipe wired KVA usage");
 #endif
 
           &amountpipekvawired, 0, "Pipe wired KVA usage");
 #endif
 

-void pipeinit(void *dummy __unused);

 static void pipeclose(struct pipe *cpipe);
 static void pipe_free_kmem(struct pipe *cpipe);
 static int pipe_create(struct pipe **cpipep);
 static void pipeclose(struct pipe *cpipe);
 static void pipe_free_kmem(struct pipe *cpipe);
 static int pipe_create(struct pipe **cpipep);


@@ -258,7 +267,7 @@ static zone_t pipe_zone;
 SYSINIT(vfs, SI_SUB_VFS, SI_ORDER_ANY, pipeinit, NULL);
 
 void
 SYSINIT(vfs, SI_SUB_VFS, SI_ORDER_ANY, pipeinit, NULL);
 
 void

-pipeinit(void *dummy __unused)
+pipeinit(void)

 {
         pipe_zone = (zone_t)zinit(sizeof(struct pipe), 8192 * sizeof(struct pipe), 4096, "pipe zone");
 
 {
         pipe_zone = (zone_t)zinit(sizeof(struct pipe), 8192 * sizeof(struct pipe), 4096, "pipe zone");
 


@@ -266,14 +275,40 @@ pipeinit(void *dummy __unused)
         * allocate lock group attribute and group for pipe mutexes
         */
        pipe_mtx_grp_attr = lck_grp_attr_alloc_init();
         * allocate lock group attribute and group for pipe mutexes
         */
        pipe_mtx_grp_attr = lck_grp_attr_alloc_init();

-       //lck_grp_attr_setstat(pipe_mtx_grp_attr);

        pipe_mtx_grp = lck_grp_alloc_init("pipe", pipe_mtx_grp_attr);
 
        /*
         * allocate the lock attribute for pipe mutexes
         */
        pipe_mtx_attr = lck_attr_alloc_init();
        pipe_mtx_grp = lck_grp_alloc_init("pipe", pipe_mtx_grp_attr);
 
        /*
         * allocate the lock attribute for pipe mutexes
         */
        pipe_mtx_attr = lck_attr_alloc_init();

-       //lck_attr_setdebug(pipe_mtx_attr);
+}
+
+/* Bitmap for things to touch in pipe_touch() */
+#define        PIPE_ATIME      0x00000001      /* time of last access */
+#define        PIPE_MTIME      0x00000002      /* time of last modification */
+#define        PIPE_CTIME      0x00000004      /* time of last status change */
+
+static void
+pipe_touch(struct pipe *tpipe, int touch)
+{
+       struct timeval now;
+
+       microtime(&now);
+
+       if (touch & PIPE_ATIME) {
+               tpipe->st_atimespec.tv_sec  = now.tv_sec;
+               tpipe->st_atimespec.tv_nsec = now.tv_usec * 1000;
+       }
+
+       if (touch & PIPE_MTIME) {
+               tpipe->st_mtimespec.tv_sec  = now.tv_sec;
+               tpipe->st_mtimespec.tv_nsec = now.tv_usec * 1000;
+       }
+
+       if (touch & PIPE_CTIME) {
+               tpipe->st_ctimespec.tv_sec  = now.tv_sec;
+               tpipe->st_ctimespec.tv_nsec = now.tv_usec * 1000;
+       }

 }
 
 
 }
 
 


@@ -284,7 +319,7 @@ pipeinit(void *dummy __unused)
 
 /* ARGSUSED */
 int
 
 /* ARGSUSED */
 int

-pipe(struct proc *p, __unused struct pipe_args *uap, register_t *retval)
+pipe(proc_t p, __unused struct pipe_args *uap, register_t *retval)

 {
        struct fileproc *rf, *wf;
        struct pipe *rpipe, *wpipe;
 {
        struct fileproc *rf, *wf;
        struct pipe *rpipe, *wpipe;


@@ -321,7 +356,7 @@ pipe(struct proc *p, __unused struct pipe_args *uap, register_t *retval)
        TAILQ_INIT(&rpipe->pipe_evlist);
        TAILQ_INIT(&wpipe->pipe_evlist);
 
        TAILQ_INIT(&rpipe->pipe_evlist);
        TAILQ_INIT(&wpipe->pipe_evlist);
 

-       error = falloc(p, &rf, &fd);
+       error = falloc(p, &rf, &fd, vfs_context_current());

        if (error) {
                goto freepipes;
        }
        if (error) {
                goto freepipes;
        }


@@ -337,7 +372,7 @@ pipe(struct proc *p, __unused struct pipe_args *uap, register_t *retval)
        rf->f_data = (caddr_t)rpipe;
        rf->f_ops = &pipeops;
 
        rf->f_data = (caddr_t)rpipe;
        rf->f_ops = &pipeops;
 

-       error = falloc(p, &wf, &fd);
+       error = falloc(p, &wf, &fd, vfs_context_current());

        if (error) {
                fp_free(p, retval[0], rf);
                goto freepipes;
        if (error) {
                fp_free(p, retval[0], rf);
                goto freepipes;


@@ -347,30 +382,31 @@ pipe(struct proc *p, __unused struct pipe_args *uap, register_t *retval)
        wf->f_data = (caddr_t)wpipe;
        wf->f_ops = &pipeops;
 
        wf->f_data = (caddr_t)wpipe;
        wf->f_ops = &pipeops;
 

+       rpipe->pipe_peer = wpipe;
+       wpipe->pipe_peer = rpipe;
+       rpipe->pipe_mtxp = wpipe->pipe_mtxp = pmtx;
+

        retval[1] = fd;
        retval[1] = fd;

-#ifdef MAC
+#if CONFIG_MACF

        /*
         * XXXXXXXX SHOULD NOT HOLD FILE_LOCK() XXXXXXXXXXXX
         *
         * struct pipe represents a pipe endpoint.  The MAC label is shared
        /*
         * XXXXXXXX SHOULD NOT HOLD FILE_LOCK() XXXXXXXXXXXX
         *
         * struct pipe represents a pipe endpoint.  The MAC label is shared

-        * between the connected endpoints.  As a result mac_init_pipe() and
-        * mac_create_pipe() should only be called on one of the endpoints
+        * between the connected endpoints.  As a result mac_pipe_label_init() and
+        * mac_pipe_label_associate() should only be called on one of the endpoints

         * after they have been connected.
         */
         * after they have been connected.
         */

-       mac_init_pipe(rpipe);
-       mac_create_pipe(td->td_ucred, rpipe);
+       mac_pipe_label_init(rpipe);
+       mac_pipe_label_associate(kauth_cred_get(), rpipe);
+       wpipe->pipe_label = rpipe->pipe_label;

 #endif
 #endif

-       proc_fdlock(p);
-        *fdflags(p, retval[0]) &= ~UF_RESERVED;
-        *fdflags(p, retval[1]) &= ~UF_RESERVED;
+       proc_fdlock_spin(p);
+       procfdtbl_releasefd(p, retval[0], NULL);
+       procfdtbl_releasefd(p, retval[1], NULL);

        fp_drop(p, retval[0], rf, 1);
        fp_drop(p, retval[1], wf, 1);
        proc_fdunlock(p);
 
        fp_drop(p, retval[0], rf, 1);
        fp_drop(p, retval[1], wf, 1);
        proc_fdunlock(p);
 

-       rpipe->pipe_peer = wpipe;
-       wpipe->pipe_peer = rpipe;
-
-       rpipe->pipe_mtxp = wpipe->pipe_mtxp = pmtx;

 
        return (0);
 
 
        return (0);
 


@@ -382,56 +418,116 @@ freepipes:
        return (error);
 }
 
        return (error);
 }
 

-

 int
 int

-pipe_stat(struct pipe *cpipe, struct stat *ub)
+pipe_stat(struct pipe *cpipe, void *ub, int isstat64)

 {
 {

-#ifdef MAC
+#if CONFIG_MACF

         int error;
 #endif
         int error;
 #endif

-       struct timeval now;
+       int     pipe_size = 0;
+       int     pipe_count;
+       struct stat *sb = (struct stat *)0;     /* warning avoidance ; protected by isstat64 */
+       struct stat64 * sb64 = (struct stat64 *)0;  /* warning avoidance ; protected by isstat64 */

 
        if (cpipe == NULL)
                return (EBADF);
 
        if (cpipe == NULL)
                return (EBADF);

-#ifdef MAC

        PIPE_LOCK(cpipe);
        PIPE_LOCK(cpipe);

-       error = mac_check_pipe_stat(active_cred, cpipe);
-       PIPE_UNLOCK(cpipe);
-       if (error)
+
+#if CONFIG_MACF
+       error = mac_pipe_check_stat(kauth_cred_get(), cpipe);
+       if (error) {
+               PIPE_UNLOCK(cpipe);

                return (error);
                return (error);

+       }

 #endif
        if (cpipe->pipe_buffer.buffer == 0) {
                /*
                 * must be stat'ing the write fd
                 */
 #endif
        if (cpipe->pipe_buffer.buffer == 0) {
                /*
                 * must be stat'ing the write fd
                 */

-               cpipe = cpipe->pipe_peer;
-
-               if (cpipe == NULL)
-                       return (EBADF);
+               if (cpipe->pipe_peer) {
+                       /*
+                        * the peer still exists, use it's info
+                        */
+                       pipe_size  = cpipe->pipe_peer->pipe_buffer.size;
+                       pipe_count = cpipe->pipe_peer->pipe_buffer.cnt;
+               } else {
+                       pipe_count = 0;
+               }
+       } else {
+               pipe_size  = cpipe->pipe_buffer.size;
+               pipe_count = cpipe->pipe_buffer.cnt;

        }
        }

-       bzero(ub, sizeof(*ub));
-       ub->st_mode = S_IFIFO | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP;
-       ub->st_blksize = cpipe->pipe_buffer.size;
-       ub->st_size = cpipe->pipe_buffer.cnt;
-       ub->st_blocks = (ub->st_size + ub->st_blksize - 1) / ub->st_blksize;
-       ub->st_nlink = 1;
+       /*
+        * since peer's buffer is setup ouside of lock
+        * we might catch it in transient state
+        */
+       if (pipe_size == 0)
+               pipe_size  = PIPE_SIZE;

 
 

-       ub->st_uid = kauth_getuid();
-       ub->st_gid = kauth_getgid();
+       if (isstat64 != 0) {
+               sb64 = (struct stat64 *)ub;     

 
 

-       microtime(&now);
-       ub->st_atimespec.tv_sec  = now.tv_sec;
-       ub->st_atimespec.tv_nsec = now.tv_usec * 1000;
+               bzero(sb64, sizeof(*sb64));
+               sb64->st_mode = S_IFIFO | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP;
+               sb64->st_blksize = pipe_size;
+               sb64->st_size = pipe_count;
+               sb64->st_blocks = (sb64->st_size + sb64->st_blksize - 1) / sb64->st_blksize;
+       
+               sb64->st_uid = kauth_getuid();
+               sb64->st_gid = kauth_getgid();
+       
+               sb64->st_atimespec.tv_sec  = cpipe->st_atimespec.tv_sec;
+               sb64->st_atimespec.tv_nsec = cpipe->st_atimespec.tv_nsec;
+       
+               sb64->st_mtimespec.tv_sec  = cpipe->st_mtimespec.tv_sec;
+               sb64->st_mtimespec.tv_nsec = cpipe->st_mtimespec.tv_nsec;
+
+               sb64->st_ctimespec.tv_sec  = cpipe->st_ctimespec.tv_sec;
+               sb64->st_ctimespec.tv_nsec = cpipe->st_ctimespec.tv_nsec;
+
+               /*
+               * Return a relatively unique inode number based on the current
+               * address of this pipe's struct pipe.  This number may be recycled
+               * relatively quickly.
+               */
+               sb64->st_ino = (ino64_t)((uint32_t)cpipe);
+       } else {
+               sb = (struct stat *)ub; 
+
+               bzero(sb, sizeof(*sb));
+               sb->st_mode = S_IFIFO | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP;
+               sb->st_blksize = pipe_size;
+               sb->st_size = pipe_count;
+               sb->st_blocks = (sb->st_size + sb->st_blksize - 1) / sb->st_blksize;
+       
+               sb->st_uid = kauth_getuid();
+               sb->st_gid = kauth_getgid();
+       
+               sb->st_atimespec.tv_sec  = cpipe->st_atimespec.tv_sec;
+               sb->st_atimespec.tv_nsec = cpipe->st_atimespec.tv_nsec;
+       
+               sb->st_mtimespec.tv_sec  = cpipe->st_mtimespec.tv_sec;
+               sb->st_mtimespec.tv_nsec = cpipe->st_mtimespec.tv_nsec;

 
 

-       ub->st_mtimespec.tv_sec  = now.tv_sec;
-       ub->st_mtimespec.tv_nsec = now.tv_usec * 1000;
+               sb->st_ctimespec.tv_sec  = cpipe->st_ctimespec.tv_sec;
+               sb->st_ctimespec.tv_nsec = cpipe->st_ctimespec.tv_nsec;

 
 

-       ub->st_ctimespec.tv_sec  = now.tv_sec;
-       ub->st_ctimespec.tv_nsec = now.tv_usec * 1000;
+               /*
+               * Return a relatively unique inode number based on the current
+               * address of this pipe's struct pipe.  This number may be recycled
+               * relatively quickly.
+               */
+               sb->st_ino = (ino_t)cpipe;
+       }
+       PIPE_UNLOCK(cpipe);

 
        /*
 
        /*

-        * Left as 0: st_dev, st_ino, st_nlink, st_rdev, st_flags, st_gen, st_uid, st_gid.
-        * XXX (st_dev, st_ino) should be unique.
+        * POSIX: Left as 0: st_dev, st_nlink, st_rdev, st_flags, st_gen,
+        * st_uid, st_gid.
+        *
+        * XXX (st_dev) should be unique, but there is no device driver that
+        * XXX is associated with pipes, since they are implemented via a
+        * XXX struct fileops indirection rather than as FS objects.

         */
        return (0);
 }
         */
        return (0);
 }


@@ -486,6 +582,9 @@ pipe_create(struct pipe **cpipep)
         */
        bzero(cpipe, sizeof *cpipe);
 
         */
        bzero(cpipe, sizeof *cpipe);
 

+       /* Initial times are all the time of creation of the pipe */
+       pipe_touch(cpipe, PIPE_ATIME | PIPE_MTIME | PIPE_CTIME);
+

        return (0);
 }
 
        return (0);
 }
 


@@ -493,10 +592,8 @@ pipe_create(struct pipe **cpipep)
 /*
  * lock a pipe for I/O, blocking other access
  */
 /*
  * lock a pipe for I/O, blocking other access
  */

-static __inline int
-pipelock(cpipe, catch)
-       struct pipe *cpipe;
-       int catch;
+static inline int
+pipelock(struct pipe *cpipe, int catch)

 {
        int error;
 
 {
        int error;
 


@@ -516,11 +613,9 @@ pipelock(cpipe, catch)
 /*
  * unlock a pipe I/O lock
  */
 /*
  * unlock a pipe I/O lock
  */

-static __inline void
-pipeunlock(cpipe)
-       struct pipe *cpipe;
+static inline void
+pipeunlock(struct pipe *cpipe)

 {
 {

-

        cpipe->pipe_state &= ~PIPE_LOCKFL;
 
        if (cpipe->pipe_state & PIPE_LWANT) {
        cpipe->pipe_state &= ~PIPE_LOCKFL;
 
        if (cpipe->pipe_state & PIPE_LWANT) {


@@ -530,11 +625,8 @@ pipeunlock(cpipe)
 }
 
 static void
 }
 
 static void

-pipeselwakeup(cpipe, spipe)
-       struct pipe *cpipe;
-       struct pipe *spipe;
+pipeselwakeup(struct pipe *cpipe, struct pipe *spipe)

 {
 {

-

        if (cpipe->pipe_state & PIPE_SEL) {
                cpipe->pipe_state &= ~PIPE_SEL;
                selwakeup(&cpipe->pipe_sel);
        if (cpipe->pipe_state & PIPE_SEL) {
                cpipe->pipe_state &= ~PIPE_SEL;
                selwakeup(&cpipe->pipe_sel);


@@ -545,18 +637,17 @@ pipeselwakeup(cpipe, spipe)
        postpipeevent(cpipe, EV_RWBYTES);
 
        if (spipe && (spipe->pipe_state & PIPE_ASYNC) && spipe->pipe_pgid) {
        postpipeevent(cpipe, EV_RWBYTES);
 
        if (spipe && (spipe->pipe_state & PIPE_ASYNC) && spipe->pipe_pgid) {

-               struct proc *p;
-

                if (spipe->pipe_pgid < 0)
                        gsignal(-spipe->pipe_pgid, SIGIO);
                if (spipe->pipe_pgid < 0)
                        gsignal(-spipe->pipe_pgid, SIGIO);

-               else if ((p = pfind(spipe->pipe_pgid)) != (struct proc *)0)
-                       psignal(p, SIGIO);
+               else 
+                       proc_signal(spipe->pipe_pgid, SIGIO);

         }
 }
 
 /* ARGSUSED */
 static int
         }
 }
 
 /* ARGSUSED */
 static int

-pipe_read(struct fileproc *fp, struct uio *uio, __unused kauth_cred_t active_cred, __unused int flags, __unused struct proc *p)
+pipe_read(struct fileproc *fp, struct uio *uio, __unused int flags,
+       __unused vfs_context_t ctx)

 {
        struct pipe *rpipe = (struct pipe *)fp->f_data;
        int error;
 {
        struct pipe *rpipe = (struct pipe *)fp->f_data;
        int error;


@@ -570,8 +661,8 @@ pipe_read(struct fileproc *fp, struct uio *uio, __unused kauth_cred_t active_cre
        if (error)
                goto unlocked_error;
 
        if (error)
                goto unlocked_error;
 

-#ifdef MAC
-       error = mac_check_pipe_read(active_cred, rpipe);
+#if CONFIG_MACF
+       error = mac_pipe_check_read(kauth_cred_get(), rpipe);

        if (error)
                goto locked_error;
 #endif
        if (error)
                goto locked_error;
 #endif


@@ -685,7 +776,7 @@ pipe_read(struct fileproc *fp, struct uio *uio, __unused kauth_cred_t active_cre
                                goto unlocked_error;
                }
        }
                                goto unlocked_error;
                }
        }

-#ifdef MAC
+#if CONFIG_MACF

 locked_error:
 #endif
        pipeunlock(rpipe);
 locked_error:
 #endif
        pipeunlock(rpipe);


@@ -712,6 +803,9 @@ unlocked_error:
        if ((rpipe->pipe_buffer.size - rpipe->pipe_buffer.cnt) >= PIPE_BUF)
                pipeselwakeup(rpipe, rpipe->pipe_peer);
 
        if ((rpipe->pipe_buffer.size - rpipe->pipe_buffer.cnt) >= PIPE_BUF)
                pipeselwakeup(rpipe, rpipe->pipe_peer);
 

+       /* update last read time */
+       pipe_touch(rpipe, PIPE_ATIME);
+

        PIPE_UNLOCK(rpipe);
 
        return (error);
        PIPE_UNLOCK(rpipe);
 
        return (error);


@@ -962,7 +1056,8 @@ error1:
 
 
 static int
 
 
 static int

-pipe_write(struct fileproc *fp, struct uio *uio, __unused kauth_cred_t active_cred, __unused int flags, __unused struct proc *p)
+pipe_write(struct fileproc *fp, struct uio *uio, __unused int flags,
+       __unused vfs_context_t ctx)

 {
        int error = 0;
        int orig_resid;
 {
        int error = 0;
        int orig_resid;


@@ -981,8 +1076,8 @@ pipe_write(struct fileproc *fp, struct uio *uio, __unused kauth_cred_t active_cr
                PIPE_UNLOCK(rpipe);
                return (EPIPE);
        }
                PIPE_UNLOCK(rpipe);
                return (EPIPE);
        }

-#ifdef MAC
-       error = mac_check_pipe_write(active_cred, wpipe);
+#if CONFIG_MACF
+       error = mac_pipe_check_write(kauth_cred_get(), wpipe);

        if (error) {
                PIPE_UNLOCK(rpipe);
                return (error);
        if (error) {
                PIPE_UNLOCK(rpipe);
                return (error);


@@ -1271,6 +1366,10 @@ pipe_write(struct fileproc *fp, struct uio *uio, __unused kauth_cred_t active_cr
                 */
                pipeselwakeup(wpipe, wpipe);
        }
                 */
                pipeselwakeup(wpipe, wpipe);
        }

+
+       /* Update modification, status change (# of bytes in pipe) times */
+       pipe_touch(rpipe, PIPE_MTIME | PIPE_CTIME);
+       pipe_touch(wpipe, PIPE_MTIME | PIPE_CTIME);

        PIPE_UNLOCK(rpipe);
 
        return (error);
        PIPE_UNLOCK(rpipe);
 
        return (error);


@@ -1281,17 +1380,18 @@ pipe_write(struct fileproc *fp, struct uio *uio, __unused kauth_cred_t active_cr
  */
 /* ARGSUSED 3 */
 static int
  */
 /* ARGSUSED 3 */
 static int

-pipe_ioctl(struct fileproc *fp, u_long cmd, caddr_t data, __unused struct proc *p)
+pipe_ioctl(struct fileproc *fp, u_long cmd, caddr_t data,
+       __unused vfs_context_t ctx)

 {
        struct pipe *mpipe = (struct pipe *)fp->f_data;
 {
        struct pipe *mpipe = (struct pipe *)fp->f_data;

-#ifdef MAC
+#if CONFIG_MACF

        int error;
 #endif
 
        PIPE_LOCK(mpipe);
 
        int error;
 #endif
 
        PIPE_LOCK(mpipe);
 

-#ifdef MAC
-       error = mac_check_pipe_ioctl(active_cred, mpipe, cmd, data);
+#if CONFIG_MACF
+       error = mac_pipe_check_ioctl(kauth_cred_get(), mpipe, cmd);

        if (error) {
                PIPE_UNLOCK(mpipe);
 
        if (error) {
                PIPE_UNLOCK(mpipe);
 


@@ -1343,7 +1443,7 @@ pipe_ioctl(struct fileproc *fp, u_long cmd, caddr_t data, __unused struct proc *
 
 
 static int
 
 
 static int

-pipe_select(struct fileproc *fp, int which, void *wql, struct proc *p)
+pipe_select(struct fileproc *fp, int which, void *wql, vfs_context_t ctx)

 {
        struct pipe *rpipe = (struct pipe *)fp->f_data;
        struct pipe *wpipe;
 {
        struct pipe *rpipe = (struct pipe *)fp->f_data;
        struct pipe *wpipe;


@@ -1356,6 +1456,17 @@ pipe_select(struct fileproc *fp, int which, void *wql, struct proc *p)
 
        wpipe = rpipe->pipe_peer;
 
 
        wpipe = rpipe->pipe_peer;
 

+#if CONFIG_MACF
+       /*
+        * XXX We should use a per thread credential here; minimally, the
+        * XXX process credential should have a persistent reference on it
+        * XXX before being passed in here.
+        */
+       if (mac_pipe_check_select(vfs_context_ucred(ctx), rpipe, which)) {
+               PIPE_UNLOCK(rpipe);
+               return (0);
+       }
+#endif

         switch (which) {
 
         case FREAD:
         switch (which) {
 
         case FREAD:


@@ -1366,7 +1477,7 @@ pipe_select(struct fileproc *fp, int which, void *wql, struct proc *p)
                        retnum = 1;
                } else {
                        rpipe->pipe_state |= PIPE_SEL;
                        retnum = 1;
                } else {
                        rpipe->pipe_state |= PIPE_SEL;

-                       selrecord(p, &rpipe->pipe_sel, wql);
+                       selrecord(vfs_context_proc(ctx), &rpipe->pipe_sel, wql);

                }
                break;
 
                }
                break;
 


@@ -1378,12 +1489,12 @@ pipe_select(struct fileproc *fp, int which, void *wql, struct proc *p)
                        retnum = 1;
                } else {
                        wpipe->pipe_state |= PIPE_SEL;
                        retnum = 1;
                } else {
                        wpipe->pipe_state |= PIPE_SEL;

-                       selrecord(p, &wpipe->pipe_sel, wql);
+                       selrecord(vfs_context_proc(ctx), &wpipe->pipe_sel, wql);

                }
                break;
         case 0:
                rpipe->pipe_state |= PIPE_SEL;
                }
                break;
         case 0:
                rpipe->pipe_state |= PIPE_SEL;

-               selrecord(p, &rpipe->pipe_sel, wql);
+               selrecord(vfs_context_proc(ctx), &rpipe->pipe_sel, wql);

                break;
         }
        PIPE_UNLOCK(rpipe);
                break;
         }
        PIPE_UNLOCK(rpipe);


@@ -1394,14 +1505,14 @@ pipe_select(struct fileproc *fp, int which, void *wql, struct proc *p)
 
 /* ARGSUSED 1 */
 static int
 
 /* ARGSUSED 1 */
 static int

-pipe_close(struct fileglob *fg, __unused struct proc *p)
+pipe_close(struct fileglob *fg, __unused vfs_context_t ctx)

 {
         struct pipe *cpipe;
 
 {
         struct pipe *cpipe;
 

-       proc_fdlock(p);
+       proc_fdlock_spin(vfs_context_proc(ctx));

        cpipe = (struct pipe *)fg->fg_data;
        fg->fg_data = NULL;
        cpipe = (struct pipe *)fg->fg_data;
        fg->fg_data = NULL;

-       proc_fdunlock(p);
+       proc_fdunlock(vfs_context_proc(ctx));

 
        if (cpipe)
                pipeclose(cpipe);
 
        if (cpipe)
                pipeclose(cpipe);


@@ -1416,7 +1527,7 @@ pipe_free_kmem(struct pipe *cpipe)
        if (cpipe->pipe_buffer.buffer != NULL) {
                if (cpipe->pipe_buffer.size > PIPE_SIZE)
                        OSAddAtomic(-1, (SInt32 *)&nbigpipe);
        if (cpipe->pipe_buffer.buffer != NULL) {
                if (cpipe->pipe_buffer.size > PIPE_SIZE)
                        OSAddAtomic(-1, (SInt32 *)&nbigpipe);

-               OSAddAtomic(cpipe->pipe_buffer.size, (SInt32 *)&amountpipekva);
+               OSAddAtomic(-(cpipe->pipe_buffer.size), (SInt32 *)&amountpipekva);

                OSAddAtomic(-1, (SInt32 *)&amountpipes);
 
                kmem_free(kernel_map, (vm_offset_t)cpipe->pipe_buffer.buffer,
                OSAddAtomic(-1, (SInt32 *)&amountpipes);
 
                kmem_free(kernel_map, (vm_offset_t)cpipe->pipe_buffer.buffer,


@@ -1453,23 +1564,27 @@ pipeclose(struct pipe *cpipe)
        if (PIPE_MTX(cpipe) != NULL)
                PIPE_LOCK(cpipe);
                
        if (PIPE_MTX(cpipe) != NULL)
                PIPE_LOCK(cpipe);
                

-       pipeselwakeup(cpipe, cpipe);

 
        /*
         * If the other side is blocked, wake it up saying that
         * we want to close it down.
         */
 
        /*
         * If the other side is blocked, wake it up saying that
         * we want to close it down.
         */

+       cpipe->pipe_state |= PIPE_EOF;
+       pipeselwakeup(cpipe, cpipe);
+       

        while (cpipe->pipe_busy) {
        while (cpipe->pipe_busy) {

-               cpipe->pipe_state |= PIPE_WANT | PIPE_EOF;
+               cpipe->pipe_state |= PIPE_WANT;

 
                wakeup(cpipe);
 
                wakeup(cpipe);

-

                msleep(cpipe, PIPE_MTX(cpipe), PRIBIO, "pipecl", 0);
        }
 
                msleep(cpipe, PIPE_MTX(cpipe), PRIBIO, "pipecl", 0);
        }
 

-#ifdef MAC
+#if CONFIG_MACF
+       /*
+        * Free the shared pipe label only after the two ends are disconnected.
+        */

        if (cpipe->pipe_label != NULL && cpipe->pipe_peer == NULL)
        if (cpipe->pipe_label != NULL && cpipe->pipe_peer == NULL)

-               mac_destroy_pipe(cpipe);
+               mac_pipe_label_destroy(cpipe);

 #endif
 
        /*
 #endif
 
        /*


@@ -1514,20 +1629,31 @@ pipeclose(struct pipe *cpipe)
        zfree(pipe_zone, cpipe);
 }
 
        zfree(pipe_zone, cpipe);
 }
 

-

 /*ARGSUSED*/
 static int
 /*ARGSUSED*/
 static int

-pipe_kqfilter(__unused struct fileproc *fp, struct knote *kn, __unused struct proc *p)
+pipe_kqfilter(__unused struct fileproc *fp, struct knote *kn, __unused vfs_context_t ctx)

 {
        struct pipe *cpipe;
 
        cpipe = (struct pipe *)kn->kn_fp->f_data;
 
        PIPE_LOCK(cpipe);
 {
        struct pipe *cpipe;
 
        cpipe = (struct pipe *)kn->kn_fp->f_data;
 
        PIPE_LOCK(cpipe);

+#if CONFIG_MACF
+       /*
+        * XXX We should use a per thread credential here; minimally, the
+        * XXX process credential should have a persistent reference on it
+        * XXX before being passed in here.
+        */
+       if (mac_pipe_check_kqfilter(vfs_context_ucred(ctx), kn, cpipe) != 0) {
+               PIPE_UNLOCK(cpipe);
+               return (1);
+       }
+#endif

 
        switch (kn->kn_filter) {
        case EVFILT_READ:
                kn->kn_fop = &pipe_rfiltops;
 
        switch (kn->kn_filter) {
        case EVFILT_READ:
                kn->kn_fop = &pipe_rfiltops;

+

                break;
        case EVFILT_WRITE:
                kn->kn_fop = &pipe_wfiltops;
                break;
        case EVFILT_WRITE:
                kn->kn_fop = &pipe_wfiltops;


@@ -1539,6 +1665,7 @@ pipe_kqfilter(__unused struct fileproc *fp, struct knote *kn, __unused struct pr
                        PIPE_UNLOCK(cpipe);
                        return (EPIPE);
                }
                        PIPE_UNLOCK(cpipe);
                        return (EPIPE);
                }

+               if (cpipe->pipe_peer)

                cpipe = cpipe->pipe_peer;
                break;
        default:
                cpipe = cpipe->pipe_peer;
                break;
        default:


@@ -1602,9 +1729,10 @@ filt_piperead(struct knote *kn, long hint)
            (wpipe == NULL) || (wpipe->pipe_state & PIPE_EOF)) {
                kn->kn_flags |= EV_EOF;
                retval = 1;
            (wpipe == NULL) || (wpipe->pipe_state & PIPE_EOF)) {
                kn->kn_flags |= EV_EOF;
                retval = 1;

-       } else
+       } else {

                retval = (kn->kn_sfflags & NOTE_LOWAT) ?
                         (kn->kn_data >= kn->kn_sdata) : (kn->kn_data > 0);
                retval = (kn->kn_sfflags & NOTE_LOWAT) ?
                         (kn->kn_data >= kn->kn_sdata) : (kn->kn_data > 0);

+       }

 
        if (hint == 0)
                PIPE_UNLOCK(rpipe);
 
        if (hint == 0)
                PIPE_UNLOCK(rpipe);


@@ -1639,6 +1767,8 @@ filt_pipewrite(struct knote *kn, long hint)
                return (1);
        }
        kn->kn_data = wpipe->pipe_buffer.size - wpipe->pipe_buffer.cnt;
                return (1);
        }
        kn->kn_data = wpipe->pipe_buffer.size - wpipe->pipe_buffer.cnt;

+       if (!kn->kn_data && wpipe->pipe_buffer.size == 0)
+               kn->kn_data = 1; /* unwritten pipe is ready for write */

 
 #ifndef PIPE_NODIRECT
        if (wpipe->pipe_state & PIPE_DIRECTW)
 
 #ifndef PIPE_NODIRECT
        if (wpipe->pipe_state & PIPE_DIRECTW)


@@ -1650,3 +1780,86 @@ filt_pipewrite(struct knote *kn, long hint)
        return (kn->kn_data >= ((kn->kn_sfflags & NOTE_LOWAT) ?
                                 kn->kn_sdata : PIPE_BUF));
 }
        return (kn->kn_data >= ((kn->kn_sfflags & NOTE_LOWAT) ?
                                 kn->kn_sdata : PIPE_BUF));
 }

+
+int
+fill_pipeinfo(struct pipe * cpipe, struct pipe_info * pinfo)
+{
+#if CONFIG_MACF
+        int error;
+#endif
+       struct timeval now;
+       struct vinfo_stat * ub;
+       int pipe_size = 0;
+       int pipe_count;
+
+       if (cpipe == NULL)
+               return (EBADF);
+       PIPE_LOCK(cpipe);
+
+#if CONFIG_MACF
+       error = mac_pipe_check_stat(kauth_cred_get(), cpipe);
+       if (error) {
+               PIPE_UNLOCK(cpipe);
+               return (error);
+       }
+#endif
+       if (cpipe->pipe_buffer.buffer == 0) {
+               /*
+                * must be stat'ing the write fd
+                */
+               if (cpipe->pipe_peer) {
+                       /*
+                        * the peer still exists, use it's info
+                        */
+                       pipe_size  = cpipe->pipe_peer->pipe_buffer.size;
+                       pipe_count = cpipe->pipe_peer->pipe_buffer.cnt;
+               } else {
+                       pipe_count = 0;
+               }
+       } else {
+               pipe_size  = cpipe->pipe_buffer.size;
+               pipe_count = cpipe->pipe_buffer.cnt;
+       }
+       /*
+        * since peer's buffer is setup ouside of lock
+        * we might catch it in transient state
+        */
+       if (pipe_size == 0)
+               pipe_size  = PIPE_SIZE;
+
+       ub = &pinfo->pipe_stat;
+
+       bzero(ub, sizeof(*ub));
+       ub->vst_mode = S_IFIFO | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP;
+       ub->vst_blksize = pipe_size;
+       ub->vst_size = pipe_count;
+       if (ub->vst_blksize != 0)
+               ub->vst_blocks = (ub->vst_size + ub->vst_blksize - 1) / ub->vst_blksize;
+       ub->vst_nlink = 1;
+
+       ub->vst_uid = kauth_getuid();
+       ub->vst_gid = kauth_getgid();
+
+       microtime(&now);
+       ub->vst_atime  = now.tv_sec;
+       ub->vst_atimensec = now.tv_usec * 1000;
+
+       ub->vst_mtime  = now.tv_sec;
+       ub->vst_mtimensec = now.tv_usec * 1000;
+
+       ub->vst_ctime  = now.tv_sec;
+       ub->vst_ctimensec = now.tv_usec * 1000;
+
+       /*
+        * Left as 0: st_dev, st_ino, st_nlink, st_rdev, st_flags, st_gen, st_uid, st_gid.
+        * XXX (st_dev, st_ino) should be unique.
+        */
+
+       pinfo->pipe_handle = (uint64_t)((uintptr_t)cpipe);
+       pinfo->pipe_peerhandle = (uint64_t)((uintptr_t)(cpipe->pipe_peer));
+       pinfo->pipe_status = cpipe->pipe_state;
+
+       PIPE_UNLOCK(cpipe);
+
+       return (0);
+}