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5914 pipe generates inodes with ino > 4G


   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T     */
  22 
  23 /*
  24  * Copyright (c) 1988, 2010, Oracle and/or its affiliates. All rights reserved.



  25  */
  26 
  27 /*
  28  * The routines defined in this file are supporting routines for FIFOFS
  29  * file system type.
  30  */
  31 #include <sys/types.h>
  32 #include <sys/param.h>
  33 #include <sys/systm.h>
  34 #include <sys/debug.h>
  35 #include <sys/errno.h>
  36 #include <sys/time.h>
  37 #include <sys/kmem.h>
  38 #include <sys/inline.h>
  39 #include <sys/file.h>
  40 #include <sys/proc.h>
  41 #include <sys/stat.h>
  42 #include <sys/sysmacros.h>
  43 #include <sys/var.h>
  44 #include <sys/vfs.h>


 535         fnp1->fn_flag        = fnp2->fn_flag              = ISPIPE | FIFOFAST;
 536 #endif /* FIFODEBUG */
 537         now = gethrestime_sec();
 538         fnp1->fn_atime       = fnp2->fn_atime     = now;
 539         fnp1->fn_mtime       = fnp2->fn_mtime     = now;
 540         fnp1->fn_ctime       = fnp2->fn_ctime     = now;
 541 
 542         *vpp1 = nvp1 = FTOV(fnp1);
 543         *vpp2 = nvp2 = FTOV(fnp2);
 544 
 545         fifo_reinit_vp(nvp1);           /* Reinitialize vnodes for reuse... */
 546         fifo_reinit_vp(nvp2);
 547         nvp1->v_vfsp = fifovfsp;     /* Need to re-establish VFS & device */
 548         nvp2->v_vfsp = fifovfsp;     /* before we can reuse this vnode. */
 549         nvp1->v_rdev = fifodev;
 550         nvp2->v_rdev = fifodev;
 551 }
 552 
 553 /*
 554  * Attempt to establish a unique pipe id.  Only un-named pipes use this
 555  * routine.

 556  */
 557 ino_t
 558 fifogetid(void)
 559 {
 560         static ino_t fifo_ino = 0;
 561         ino_t fino;
 562 
 563         mutex_enter(&fino_lock);
 564         fino = fifo_ino++;
 565         mutex_exit(&fino_lock);
 566         return (fino);
 567 }
 568 
 569 
 570 /*
 571  * Stream a pipe/FIFO.
 572  * The FIFOCONNLD flag is used when CONNLD has been pushed on the stream.
 573  * If the flag is set, a new vnode is created by calling fifo_connld().
 574  * Connld logic was moved to fifo_connld() to speed up the open
 575  * operation, simplify the connld/fifo interaction, and remove inherent
 576  * race conditions between the connld module and fifos.
 577  * This routine is single threaded for two reasons.
 578  * 1) connld requests are synchronous; that is, they must block
 579  *    until the server does an I_RECVFD (oh, well).  Single threading is
 580  *    the simplest way to accomplish this.




   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T     */
  22 
  23 /*
  24  * Copyright (c) 1988, 2010, Oracle and/or its affiliates. All rights reserved.
  25  *
  26  * Copyright 2017 Ivan Richwalski <ivan@seppuku.net>
  27  *
  28  */
  29 
  30 /*
  31  * The routines defined in this file are supporting routines for FIFOFS
  32  * file system type.
  33  */
  34 #include <sys/types.h>
  35 #include <sys/param.h>
  36 #include <sys/systm.h>
  37 #include <sys/debug.h>
  38 #include <sys/errno.h>
  39 #include <sys/time.h>
  40 #include <sys/kmem.h>
  41 #include <sys/inline.h>
  42 #include <sys/file.h>
  43 #include <sys/proc.h>
  44 #include <sys/stat.h>
  45 #include <sys/sysmacros.h>
  46 #include <sys/var.h>
  47 #include <sys/vfs.h>


 538         fnp1->fn_flag        = fnp2->fn_flag              = ISPIPE | FIFOFAST;
 539 #endif /* FIFODEBUG */
 540         now = gethrestime_sec();
 541         fnp1->fn_atime       = fnp2->fn_atime     = now;
 542         fnp1->fn_mtime       = fnp2->fn_mtime     = now;
 543         fnp1->fn_ctime       = fnp2->fn_ctime     = now;
 544 
 545         *vpp1 = nvp1 = FTOV(fnp1);
 546         *vpp2 = nvp2 = FTOV(fnp2);
 547 
 548         fifo_reinit_vp(nvp1);           /* Reinitialize vnodes for reuse... */
 549         fifo_reinit_vp(nvp2);
 550         nvp1->v_vfsp = fifovfsp;     /* Need to re-establish VFS & device */
 551         nvp2->v_vfsp = fifovfsp;     /* before we can reuse this vnode. */
 552         nvp1->v_rdev = fifodev;
 553         nvp2->v_rdev = fifodev;
 554 }
 555 
 556 /*
 557  * Attempt to establish a unique pipe id.  Only un-named pipes use this
 558  * routine. Use a 32-bit ino_t so any 32-bit processes that aren't large
 559  * file aware can still stat() a pipe fd and not fail with EOVERFLOW.
 560  */
 561 ino_t
 562 fifogetid(void)
 563 {
 564         static ino32_t fifo_ino = 0;
 565         ino_t fino;
 566 
 567         mutex_enter(&fino_lock);
 568         fino = fifo_ino++;
 569         mutex_exit(&fino_lock);
 570         return (fino);
 571 }
 572 
 573 
 574 /*
 575  * Stream a pipe/FIFO.
 576  * The FIFOCONNLD flag is used when CONNLD has been pushed on the stream.
 577  * If the flag is set, a new vnode is created by calling fifo_connld().
 578  * Connld logic was moved to fifo_connld() to speed up the open
 579  * operation, simplify the connld/fifo interaction, and remove inherent
 580  * race conditions between the connld module and fifos.
 581  * This routine is single threaded for two reasons.
 582  * 1) connld requests are synchronous; that is, they must block
 583  *    until the server does an I_RECVFD (oh, well).  Single threading is
 584  *    the simplest way to accomplish this.