Print this page
2916 DTrace in a zone should be able to access fds[]


   4  * The contents of this file are subject to the terms of the
   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 
  22 /*
  23  * Copyright (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved.

  24  */
  25 
  26 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T     */
  27 /*      All Rights Reserved */
  28 
  29 #include <sys/types.h>
  30 #include <sys/sysmacros.h>
  31 #include <sys/param.h>
  32 #include <sys/systm.h>
  33 #include <sys/errno.h>
  34 #include <sys/signal.h>
  35 #include <sys/cred.h>
  36 #include <sys/user.h>
  37 #include <sys/conf.h>
  38 #include <sys/vfs.h>
  39 #include <sys/vnode.h>
  40 #include <sys/pathname.h>
  41 #include <sys/file.h>
  42 #include <sys/proc.h>
  43 #include <sys/var.h>
  44 #include <sys/cpuvar.h>
  45 #include <sys/open.h>
  46 #include <sys/cmn_err.h>
  47 #include <sys/priocntl.h>
  48 #include <sys/procset.h>
  49 #include <sys/prsystm.h>
  50 #include <sys/debug.h>
  51 #include <sys/kmem.h>
  52 #include <sys/atomic.h>
  53 #include <sys/fcntl.h>
  54 #include <sys/poll.h>
  55 #include <sys/rctl.h>
  56 #include <sys/port_impl.h>

  57 
  58 #include <c2/audit.h>
  59 #include <sys/nbmlock.h>
  60 
  61 #ifdef DEBUG
  62 
  63 static uint32_t afd_maxfd;      /* # of entries in maximum allocated array */
  64 static uint32_t afd_alloc;      /* count of kmem_alloc()s */
  65 static uint32_t afd_free;       /* count of kmem_free()s */
  66 static uint32_t afd_wait;       /* count of waits on non-zero ref count */
  67 #define MAXFD(x)        (afd_maxfd = ((afd_maxfd >= (x))? afd_maxfd : (x)))
  68 #define COUNT(x)        atomic_add_32(&x, 1)
  69 
  70 #else   /* DEBUG */
  71 
  72 #define MAXFD(x)
  73 #define COUNT(x)
  74 
  75 #endif  /* DEBUG */
  76 


 935 
 936         mutex_enter(&fp->f_tlock);
 937 
 938         ASSERT(fp->f_count > 0);
 939 
 940         count = fp->f_count--;
 941         flag = fp->f_flag;
 942         offset = fp->f_offset;
 943 
 944         vp = fp->f_vnode;
 945 
 946         error = VOP_CLOSE(vp, flag, count, offset, fp->f_cred, NULL);
 947 
 948         if (count > 1) {
 949                 mutex_exit(&fp->f_tlock);
 950                 return (error);
 951         }
 952         ASSERT(fp->f_count == 0);
 953         mutex_exit(&fp->f_tlock);
 954 












 955         VN_RELE(vp);
 956         /*
 957          * deallocate resources to audit_data
 958          */
 959         if (audit_active)
 960                 audit_unfalloc(fp);
 961         crfree(fp->f_cred);
 962         kmem_cache_free(file_cache, fp);
 963         return (error);
 964 }
 965 
 966 /*
 967  * This is a combination of ufalloc() and setf().
 968  */
 969 int
 970 ufalloc_file(int start, file_t *fp)
 971 {
 972         proc_t *p = curproc;
 973         uf_info_t *fip = P_FINFO(p);
 974         int filelimit;




   4  * The contents of this file are subject to the terms of the
   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 
  22 /*
  23  * Copyright (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Copyright (c) 2012, Joyent Inc. All rights reserved.
  25  */
  26 
  27 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T     */
  28 /*      All Rights Reserved */
  29 
  30 #include <sys/types.h>
  31 #include <sys/sysmacros.h>
  32 #include <sys/param.h>
  33 #include <sys/systm.h>
  34 #include <sys/errno.h>
  35 #include <sys/signal.h>
  36 #include <sys/cred.h>
  37 #include <sys/user.h>
  38 #include <sys/conf.h>
  39 #include <sys/vfs.h>
  40 #include <sys/vnode.h>
  41 #include <sys/pathname.h>
  42 #include <sys/file.h>
  43 #include <sys/proc.h>
  44 #include <sys/var.h>
  45 #include <sys/cpuvar.h>
  46 #include <sys/open.h>
  47 #include <sys/cmn_err.h>
  48 #include <sys/priocntl.h>
  49 #include <sys/procset.h>
  50 #include <sys/prsystm.h>
  51 #include <sys/debug.h>
  52 #include <sys/kmem.h>
  53 #include <sys/atomic.h>
  54 #include <sys/fcntl.h>
  55 #include <sys/poll.h>
  56 #include <sys/rctl.h>
  57 #include <sys/port_impl.h>
  58 #include <sys/dtrace.h>
  59 
  60 #include <c2/audit.h>
  61 #include <sys/nbmlock.h>
  62 
  63 #ifdef DEBUG
  64 
  65 static uint32_t afd_maxfd;      /* # of entries in maximum allocated array */
  66 static uint32_t afd_alloc;      /* count of kmem_alloc()s */
  67 static uint32_t afd_free;       /* count of kmem_free()s */
  68 static uint32_t afd_wait;       /* count of waits on non-zero ref count */
  69 #define MAXFD(x)        (afd_maxfd = ((afd_maxfd >= (x))? afd_maxfd : (x)))
  70 #define COUNT(x)        atomic_add_32(&x, 1)
  71 
  72 #else   /* DEBUG */
  73 
  74 #define MAXFD(x)
  75 #define COUNT(x)
  76 
  77 #endif  /* DEBUG */
  78 


 937 
 938         mutex_enter(&fp->f_tlock);
 939 
 940         ASSERT(fp->f_count > 0);
 941 
 942         count = fp->f_count--;
 943         flag = fp->f_flag;
 944         offset = fp->f_offset;
 945 
 946         vp = fp->f_vnode;
 947 
 948         error = VOP_CLOSE(vp, flag, count, offset, fp->f_cred, NULL);
 949 
 950         if (count > 1) {
 951                 mutex_exit(&fp->f_tlock);
 952                 return (error);
 953         }
 954         ASSERT(fp->f_count == 0);
 955         mutex_exit(&fp->f_tlock);
 956 
 957         /*
 958          * If DTrace has getf() subroutines active, it will set dtrace_closef
 959          * to point to code that implements a barrier with respect to probe
 960          * context.  This must be called before the file_t is freed (and the
 961          * vnode that it refers to is released) -- but it must be after the
 962          * file_t has been removed from the uf_entry_t.  That is, there must
 963          * be no way for a racing getf() in probe context to yield the fp that
 964          * we're operating upon.
 965          */
 966         if (dtrace_closef != NULL)
 967                 (*dtrace_closef)();
 968 
 969         VN_RELE(vp);
 970         /*
 971          * deallocate resources to audit_data
 972          */
 973         if (audit_active)
 974                 audit_unfalloc(fp);
 975         crfree(fp->f_cred);
 976         kmem_cache_free(file_cache, fp);
 977         return (error);
 978 }
 979 
 980 /*
 981  * This is a combination of ufalloc() and setf().
 982  */
 983 int
 984 ufalloc_file(int start, file_t *fp)
 985 {
 986         proc_t *p = curproc;
 987         uf_info_t *fip = P_FINFO(p);
 988         int filelimit;