xnu-6153.11.26.tar.gz

[apple/xnu.git] / bsd / vfs / vfs_fslog.c

diff --git a/bsd/vfs/vfs_fslog.c b/bsd/vfs/vfs_fslog.c
index 618e4546ceefecb9d437fcf2981ead3bc93fdaa1..37ac39c09c9bd449b62b658f7e3658d9542cdd67 100644 (file)
--- a/bsd/vfs/vfs_fslog.c
+++ b/bsd/vfs/vfs_fslog.c
@@ -1,8 +1,8 @@
 /*
 /*

- * Copyright (c) 2006 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2006-2017 Apple Inc. All rights reserved.

  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@

- * 
+ *

  * This file contains Original Code and/or Modifications of Original Code
  * as defined in and that are subject to the Apple Public Source License
  * Version 2.0 (the 'License'). You may not use this file except in
  * This file contains Original Code and/or Modifications of Original Code
  * as defined in and that are subject to the Apple Public Source License
  * Version 2.0 (the 'License'). You may not use this file except in


@@ -11,10 +11,10 @@
  * unlawful or unlicensed copies of an Apple operating system, or to
  * circumvent, violate, or enable the circumvention or violation of, any
  * terms of an Apple operating system software license agreement.
  * unlawful or unlicensed copies of an Apple operating system, or to
  * circumvent, violate, or enable the circumvention or violation of, any
  * terms of an Apple operating system software license agreement.

- * 
+ *

  * Please obtain a copy of the License at
  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  * Please obtain a copy of the License at
  * http://www.opensource.apple.com/apsl/ and read it before using this file.

- * 
+ *

  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,


@@ -22,11 +22,10 @@
  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  * Please see the License for the specific language governing rights and
  * limitations under the License.
  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  * Please see the License for the specific language governing rights and
  * limitations under the License.

- * 
+ *

  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 
  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 

-#include <stdarg.h>

 #include <sys/errno.h>
 #include <sys/types.h>
 #include <sys/malloc.h>
 #include <sys/errno.h>
 #include <sys/types.h>
 #include <sys/malloc.h>


@@ -35,426 +34,246 @@
 #include <sys/kauth.h>
 #include <sys/mount.h>
 #include <sys/vnode.h>
 #include <sys/kauth.h>
 #include <sys/mount.h>
 #include <sys/vnode.h>

-#include <sys/syslog.h>                /* for vaddlog() */
+#include <sys/syslog.h>

 #include <sys/vnode_internal.h>
 #include <sys/vnode_internal.h>

-#include <dev/random/randomdev.h>
-

 #include <sys/fslog.h>
 #include <sys/mount_internal.h>
 #include <sys/fslog.h>
 #include <sys/mount_internal.h>

+#include <sys/kasl.h>

 
 

-/* String to append as format modifier for each key-value pair */
-#define FSLOG_KEYVAL_FMT       "[%s %s] " 
-#define FSLOG_KEYVAL_FMT_LEN   (sizeof(FSLOG_KEYVAL_FMT) - 1)
-
-#define FSLOG_NEWLINE_CHAR     "\n"
-#define FSLOG_NEWLINE_CHAR_LEN (sizeof(FSLOG_NEWLINE_CHAR) - 1)
-
-/* Length of entire ASL message in 10 characters.  Kernel defaults to zero */
-#define FSLOG_ASL_MSG_LEN      "         0"
-
-/* Length of default format string to be used by printf */
-#define MAX_FMT_LEN            256
-
-/* Internal function to print input values as key-value pairs in format 
- * identifiable by Apple system log (ASL) facility.   All key-value pairs
- * are assumed to be pointer to strings and are provided using two ways - 
- * (a) va_list argument which is a list of varying number of arguments 
- *     created by the caller of this function.
- * (b) variable number of arguments passed to this function. 
- * 
- * Parameters -
- *     level     - Priority level for this ASL message 
- *     facility  - Facility for this ASL message.
- *     num_pairs - Number of key-value pairs provided by vargs argument.
- *     vargs     - List of key-value pairs.  
- *     ...       - Additional key-value pairs (apart from vargs) as variable 
- *                 argument list.  A NULL value indicates the end of the 
- *                 variable argument list.
- * 
- * Returns - 
- *     zero    - On success, when it prints all key-values pairs provided.
- *     E2BIG   - When it cannot print all key-value pairs provided and had
- *               to truncate the output.
- */
-static int fslog_asl_msg(int level, const char *facility, int num_pairs, va_list vargs, ...)
-{
-       int err = 0;
-       char fmt[MAX_FMT_LEN];  /* Format string to use with vaddlog */
-       int calc_pairs = 0;
-       size_t len;
-       int i;
-       va_list ap;
-       char *ptr;
-
-       /* Mask extra bits, if any, from priority level */
-       level = LOG_PRI(level);
-
-       /* Create the first part of format string consisting of ASL 
-        * message length, level, and facility.
-        */
-       if (facility) {
-               snprintf(fmt, MAX_FMT_LEN, "%s [%s %d] [%s %d] [%s %s] ",
-                       FSLOG_ASL_MSG_LEN,
-                       FSLOG_KEY_LEVEL, level,
-                       FSLOG_KEY_READ_UID, FSLOG_VAL_READ_UID, 
-                       FSLOG_KEY_FACILITY, facility);
-       } else {
-               snprintf(fmt, MAX_FMT_LEN, "%s [%s %d] [%s %d] ", 
-                       FSLOG_ASL_MSG_LEN,
-                       FSLOG_KEY_LEVEL, level,
-                       FSLOG_KEY_READ_UID, FSLOG_VAL_READ_UID);
-       }
+#include <sys/queue.h>
+#include <kern/kalloc.h>

 
 

-       /* Determine the number of key-value format string [%s %s] that 
-        * should be added in format string for every key-value pair provided
-        * in va_list.  Calculate maximum number of format string that can be 
-        * accommodated in the remaining format buffer (after saving space
-        * for newline character).  If the caller provided pairs in va_list 
-        * is more than calculated pairs, truncate extra pairs.
-        */
-       len = MAX_FMT_LEN - strlen(fmt) - FSLOG_NEWLINE_CHAR_LEN - 1;
-       calc_pairs = len / FSLOG_KEYVAL_FMT_LEN;
-       if (num_pairs <= calc_pairs) {
-               calc_pairs = num_pairs;
-       } else {
-               err = E2BIG;
-       }
+#include <uuid/uuid.h>

 
 

-       /* Append format strings [%s %s] for the key-value pairs in vargs */
-       len = MAX_FMT_LEN - FSLOG_NEWLINE_CHAR_LEN;
-       for (i = 0; i < calc_pairs; i++) {
-               (void) strlcat(fmt, FSLOG_KEYVAL_FMT, len);
-       }
+#include <stdarg.h>

 
 

-       /* Count number of variable arguments provided to this function 
-        * and determine total number of key-value pairs.
-        */
-       calc_pairs = 0;
-       va_start(ap, vargs);
-       ptr = va_arg(ap, char *);
-       while (ptr) {
-               calc_pairs++;
-               ptr = va_arg(ap, char *);
-       }
-       calc_pairs /= 2;
-       va_end(ap);
+/* Log information about external modification of a process,
+ * using MessageTracer formatting. Assumes that both the caller
+ * and target are appropriately locked.
+ * Currently prints following information -
+ *      1. Caller process name (truncated to 16 characters)
+ *     2. Caller process Mach-O UUID
+ *  3. Target process name (truncated to 16 characters)
+ *  4. Target process Mach-O UUID
+ */
+void
+fslog_extmod_msgtracer(proc_t caller, proc_t target)
+{
+       if ((caller != PROC_NULL) && (target != PROC_NULL)) {
+               /*
+                * Print into buffer large enough for "ThisIsAnApplicat(BC223DD7-B314-42E0-B6B0-C5D2E6638337)",
+                * including space for escaping, and NUL byte included in sizeof(uuid_string_t).
+                */

 
 

-       /* If user provided variable number of arguments, append them as
-        * as real key-value "[k v]" into the format string.  If the format 
-        * string is too small, ignore the key-value pair completely.
-        */
-       if (calc_pairs) {
-               char *key, *val;
-               size_t pairlen;
-               int offset;
+               uuid_string_t uuidstr;
+               char c_name[2 * MAXCOMLEN + 2 /* () */ + sizeof(uuid_string_t)];
+               char t_name[2 * MAXCOMLEN + 2 /* () */ + sizeof(uuid_string_t)];
+
+               strlcpy(c_name, caller->p_comm, sizeof(c_name));
+               uuid_unparse_upper(caller->p_uuid, uuidstr);
+               strlcat(c_name, "(", sizeof(c_name));
+               strlcat(c_name, uuidstr, sizeof(c_name));
+               strlcat(c_name, ")", sizeof(c_name));
+               if (0 != escape_str(c_name, strlen(c_name) + 1, sizeof(c_name))) {
+                       return;
+               }

 
 

-               /* Calculate bytes available for key-value pairs after reserving 
-                * bytes for newline character and NULL terminator
-                */
-               len = MAX_FMT_LEN - strlen(fmt) - FSLOG_NEWLINE_CHAR_LEN - 1;
-               offset = strlen(fmt);
-
-               va_start(ap, vargs);
-               for (i = 0; i < calc_pairs; i++) {
-                       key = va_arg(ap, char *);
-                       val = va_arg(ap, char *);
-
-                       /* Calculate bytes required to store next key-value pair as
-                        * "[key val] " including space for '[', ']', and two spaces.
-                        */
-                       pairlen = strlen(key) + strlen(val) + 4;
-                       if (pairlen > len) {
-                               err = E2BIG;
-                               break;
-                       } 
-
-                       /* len + 1 because one byte has been set aside for NULL 
-                        * terminator in calculation of 'len' above
-                        */
-                       snprintf((fmt + offset), len + 1, FSLOG_KEYVAL_FMT, key, val);
-                       offset += pairlen;
-                       len -= pairlen;
+               strlcpy(t_name, target->p_comm, sizeof(t_name));
+               uuid_unparse_upper(target->p_uuid, uuidstr);
+               strlcat(t_name, "(", sizeof(t_name));
+               strlcat(t_name, uuidstr, sizeof(t_name));
+               strlcat(t_name, ")", sizeof(t_name));
+               if (0 != escape_str(t_name, strlen(t_name) + 1, sizeof(t_name))) {
+                       return;

                }
                }

-               va_end(ap);
+#if DEBUG
+               printf("EXTMOD: %s(%d) -> %s(%d)\n",
+                   c_name,
+                   proc_pid(caller),
+                   t_name,
+                   proc_pid(target));
+#endif
+
+               kern_asl_msg(LOG_DEBUG, "messagetracer",
+                   5,
+                   "com.apple.message.domain", "com.apple.kernel.external_modification",                                     /* 0 */
+                   "com.apple.message.signature", c_name,                                     /* 1 */
+                   "com.apple.message.signature2", t_name,                                     /* 2 */
+                   "com.apple.message.result", "noop",                                     /* 3 */
+                   "com.apple.message.summarize", "YES",                                     /* 4 */
+                   NULL);

        }
        }

+}

 
 

-       /* Append newline */
-       (void) strlcat(fmt, FSLOG_NEWLINE_CHAR, MAX_FMT_LEN);
+#if defined(__x86_64__)

 
 

-       /* Print the key-value pairs in ASL format */
-       vaddlog(fmt, vargs);
+/*
+ * Log information about floating point exception handling
+ */

 
 

-       return err;
+static lck_mtx_t fpxlock;
+
+void
+fpxlog_init(void)
+{
+       lck_grp_attr_t *lck_grp_attr = lck_grp_attr_alloc_init();
+       lck_grp_t *lck_grp = lck_grp_alloc_init("fpx", lck_grp_attr);
+       lck_mtx_init(&fpxlock, lck_grp, LCK_ATTR_NULL);

 }
 
 }
 

-/* Log file system related error in key-value format identified by Apple 
- * system log (ASL) facility.  The key-value pairs are string pointers 
- * (char *) and are provided as variable arguments list.  A NULL value 
- * indicates end of the list.
- *
- * Keys can not contain '[', ']', space, and newline.  Values can not 
- * contain '[', ']', and newline.  If any key-value contains any of the 
- * reserved characters, the behavior is undefined.  The caller of the 
- * function should escape any occurrences of '[' and ']' by prefixing
- * it with '\'.
- * 
- * The function takes a message ID which can be used to logically group
- * different ASL messages.  Messages in same logical group have same message
- * ID and have information to describe order of the message --- first, 
- * middle, or last.
- *
- * The following message IDs have special meaning - 
- * FSLOG_MSG_FIRST - This message is the first message in its logical
- *     group.  This generates a unique message ID, creates two key-value 
- *     pairs with message ID and order of the message as "First".
- * FSLOG_MSG_LAST - This is really a MASK which should be logically OR'ed 
- *     with message ID to indicate the last message for a logical group.  
- *     This also creates two key-value pairs with message ID and order of 
- *     message as "Last".
- * FSLOG_MSG_SINGLE - This signifies that the message is the only message
- *     in its logical group.  Therefore no extra key-values are generated 
- *     for this option.
- * For all other values of message IDs, it regards them as intermediate 
- * message and generates two key-value pairs with message ID and order of
- * message as "Middle".
- * 
- * Returns - 
- *     Message ID of the ASL message printed.  The caller should use
- *     this value to print intermediate messages or end the logical message
- *     group.
- *     For FSLOG_MSG_SINGLE option, it returns FSLOG_MSG_SINGLE. 
- */
-unsigned long fslog_err(unsigned long msg_id, ... )
+struct fpx_event {
+       uuid_t fe_uuid;
+       uint32_t fe_code;
+       uint32_t fe_xcpt;
+       TAILQ_ENTRY(fpx_event) fe_link;
+};
+
+static bool
+match_fpx_event(const struct fpx_event *fe,
+    const uuid_t uuid, const uint32_t code, const uint32_t xcpt)

 {
 {

-       va_list ap;
-       int num_pairs;
-       char msg_id_str[21]; /* To convert 64-bit number to string with NULL char */
-       char *arg;
-       const char *msg_order_ptr;
-
-       /* Count number of arguments and key-value pairs provided by user */
-       num_pairs = 0;
-       va_start(ap, msg_id);
-       arg = va_arg(ap, char *);
-       while (arg) {
-               num_pairs++;
-               arg = va_arg(ap, char *);
-       }
-       num_pairs /= 2;
-       va_end(ap);
-
-       va_start(ap, msg_id);
-       if (msg_id == FSLOG_MSG_SINGLE) {
-               /* Single message, do not print message ID and message order */
-               (void) fslog_asl_msg(FSLOG_VAL_LEVEL, FSLOG_VAL_FACILITY, 
-                               num_pairs, ap, NULL);
-       } else {
-               if (msg_id == FSLOG_MSG_FIRST) {
-                       /* First message, generate random message ID */
-                       while ((msg_id == FSLOG_MSG_FIRST) ||
-                              (msg_id == FSLOG_MSG_LAST) ||
-                              (msg_id == FSLOG_MSG_SINGLE)) {
-                               msg_id = RandomULong();
-                               /* MSB is reserved for indicating last message 
-                                * in sequence.  Clear the MSB while generating
-                                * new message ID.
-                                */
-                               msg_id = msg_id >> 1;
-                       }
-                       msg_order_ptr = FSLOG_VAL_ORDER_FIRST;
-               } else if (msg_id & FSLOG_MSG_LAST) { 
-                       /* MSB set to indicate last message for this ID */
-                       msg_order_ptr = FSLOG_VAL_ORDER_LAST;
-                       /* MSB of message ID is set to indicate last message
-                        * in sequence.  Clear the bit to get real message ID.
-                        */
-                       msg_id = msg_id & ~FSLOG_MSG_LAST;
-               } else {
-                       /* Intermediate message for this ID */
-                       msg_order_ptr = FSLOG_VAL_ORDER_MIDDLE;
-               }
+       return code == fe->fe_code && xcpt == fe->fe_xcpt &&
+              0 == memcmp(uuid, fe->fe_uuid, sizeof(uuid_t));
+}

 
 

-               snprintf(msg_id_str, sizeof(msg_id_str), "%lu", msg_id);
-               (void) fslog_asl_msg(FSLOG_VAL_LEVEL, FSLOG_VAL_FACILITY, 
-                        num_pairs, ap, 
-                        FSLOG_KEY_MSG_ID, msg_id_str, 
-                        FSLOG_KEY_MSG_ORDER, msg_order_ptr, NULL);
-       }
-       va_end(ap);
-       return msg_id;
+#if FPX_EVENT_DBG
+static __attribute__((noinline)) void
+print_fpx_event(const char *pfx, const struct fpx_event *fe)
+{
+       uuid_string_t uustr;
+       uuid_unparse_upper(fe->fe_uuid, uustr);
+       printf("%s: code 0x%x xcpt 0x%x uuid '%s'\n",
+           pfx, fe->fe_code, fe->fe_xcpt, uustr);

 }
 }

+#define DPRINTF_FPX_EVENT(pfx, fe)      print_fpx_event(pfx, fe)
+#else
+#define DPRINTF_FPX_EVENT(pfx, fe)      /* nothing */
+#endif

 
 

-/* Search if given string contains '[' and ']'.  If any, escape it by 
- * prefixing with a '\'.  If the length of the string is not big enough, 
- * no changes are done and error is returned.
+#define MAX_DISTINCT_FPX_EVENTS 101     /* (approx one page of heap) */
+
+/*
+ * Filter to detect "new" <uuid, code, xcpt> tuples.
+ * Uses limited amount of state, managed LRU.
+ * Optimized to ignore repeated invocation with the same tuple.

  *
  *

- * Parameters -
- *     str - string that can contain '[' or ']', should be NULL terminated
- *     len - length, in bytes, of valid data, including NULL character.
- *     buflen - size of buffer that contains the string
+ * Note that there are 6 exception types, two types of FP, and
+ * many binaries, so don't make the list bound too small.
+ * It's also a linear search, so don't make it too large either.
+ * Next level filtering provided by syslogd, and summarization.

  */
  */

-static int escape_str(char *str, int len, int buflen)
+static bool
+novel_fpx_event(const uuid_t uuid, uint32_t code, uint32_t xcpt)

 {
 {

-       int count;
-       char *src, *dst;
-
-       /* Count number of characters to escape */
-       src = str;
-       count = 0;
-       do {
-               if ((*src == '[') || (*src == ']')) {
-                       count++;
-               }
-       } while (*src++);
+       static TAILQ_HEAD(fpx_event_head, fpx_event) fehead =
+           TAILQ_HEAD_INITIALIZER(fehead);
+       struct fpx_event *fe;
+
+       lck_mtx_lock(&fpxlock);
+
+       fe = TAILQ_FIRST(&fehead);
+       if (NULL != fe &&
+           match_fpx_event(fe, uuid, code, xcpt)) {
+               /* seen before and element already at head */
+               lck_mtx_unlock(&fpxlock);
+               DPRINTF_FPX_EVENT("seen, head", fe);
+               return false;
+       }

 
 

-       if (count) {
-               /* Check if the buffer has enough space to escape all characters */
-               if ((buflen - len) < count) {
-                       return ENOSPC;  
-               }
+       unsigned int count = 0;

 
 

-               src = str + len;
-               dst = src + count;
-               while (count) {
-                       *dst-- = *src;
-                       if ((*src == '[') || (*src == ']')) {
-                               /* Last char copied needs to be escaped */
-                               *dst-- = '\\';
-                               count--;
-                       }
-                       src--;
+       TAILQ_FOREACH(fe, &fehead, fe_link) {
+               if (match_fpx_event(fe, uuid, code, xcpt)) {
+                       /* seen before, now move element to head */
+                       TAILQ_REMOVE(&fehead, fe, fe_link);
+                       TAILQ_INSERT_HEAD(&fehead, fe, fe_link);
+                       lck_mtx_unlock(&fpxlock);
+                       DPRINTF_FPX_EVENT("seen, moved to head", fe);
+                       return false;

                }
                }

+               count++;

        }
 
        }
 

-       return 0;
-}
+       /* not recorded here => novel */

 
 

-/* Log information about runtime file system corruption detected by
- * the file system.  It takes the VFS mount structure as 
- * parameter which is used to access the mount point of the 
- * corrupt volume.  If no mount structure or mount point string 
- * string exists, nothing is logged to ASL database.
- * 
- * Currently prints following information - 
- *     1. Mount Point
- */
-void fslog_fs_corrupt(struct mount *mnt)
-{
-       if (mnt != NULL) {
-               if (mnt->mnt_vfsstat.f_mntonname != NULL) {
-                       fslog_err(FSLOG_MSG_SINGLE,
-                                 FSLOG_KEY_ERR_TYPE, FSLOG_VAL_ERR_TYPE_FS,
-                                 FSLOG_KEY_MNTPT, mnt->mnt_vfsstat.f_mntonname,
-                                 NULL);
-               }
+       if (count >= MAX_DISTINCT_FPX_EVENTS) {
+               /* reuse LRU element */
+               fe = TAILQ_LAST(&fehead, fpx_event_head);
+               TAILQ_REMOVE(&fehead, fe, fe_link);
+               DPRINTF_FPX_EVENT("reusing", fe);
+       } else {
+               /* add a new element to the list */
+               fe = kalloc(sizeof(*fe));

        }
        }

-               
-       return;
-} 
-
-/* Log information about IO error detected in buf_biodone()
- * Currently prints following information - 
- *     1. Physical block number
- *     2. Logical block number
- *     3. Device node 
- *     4. Mount point
- *     5. Path for file, if any
- *     6. Error number
- *     7. Type of IO (read/write)
- */
-void fslog_io_error(const buf_t bp)
+       memcpy(fe->fe_uuid, uuid, sizeof(uuid_t));
+       fe->fe_code = code;
+       fe->fe_xcpt = xcpt;
+       TAILQ_INSERT_HEAD(&fehead, fe, fe_link);
+       lck_mtx_unlock(&fpxlock);
+
+       DPRINTF_FPX_EVENT("novel", fe);
+
+       return true;
+}
+
+void
+fpxlog(
+       int code,       /* Mach exception code: e.g. 5 or 8 */
+       uint32_t stat,  /* Full FP status register bits */
+       uint32_t ctrl,  /* Full FP control register bits */
+       uint32_t xcpt)  /* Exception bits from FP status */

 {
 {

-       int err;
-       unsigned long msg_id;
-       char blknum_str[21];
-       char lblknum_str[21];
-       char errno_str[6];
-       const char *iotype;
-       unsigned char print_last = 0;
-       vnode_t vp;
-
-       if (buf_error(bp) == 0) {
+       proc_t p = current_proc();
+       if (PROC_NULL == p) {

                return;
        }
 
                return;
        }
 

-       /* Convert error number to string */
-       snprintf (errno_str, sizeof(errno_str), "%d", buf_error(bp));
+       uuid_t uuid;
+       proc_getexecutableuuid(p, uuid, sizeof(uuid));

 
 

-       /* Determine type of IO operation */
-       if (buf_flags(bp) & B_READ) {
-               iotype = FSLOG_VAL_IOTYPE_READ; 
-       } else {
-               iotype = FSLOG_VAL_IOTYPE_WRITE;        
+       /*
+        * Check to see if an exception with this <uuid, code, xcpt>
+        * has been seen before.  If "novel" then log a message.
+        */
+       if (!novel_fpx_event(uuid, code, xcpt)) {
+               return;

        }
 
        }
 

-       /* Convert physical block number to string */
-       snprintf (blknum_str, sizeof(blknum_str), "%lld", buf_blkno(bp));
-
-       /* Convert logical block number to string */
-       snprintf (lblknum_str, sizeof(lblknum_str), "%lld", buf_lblkno(bp));
-
-       msg_id = fslog_err(FSLOG_MSG_FIRST,
-                               FSLOG_KEY_ERR_TYPE, FSLOG_VAL_ERR_TYPE_IO,
-                               FSLOG_KEY_ERRNO, errno_str,
-                               FSLOG_KEY_IOTYPE, iotype,
-                               FSLOG_KEY_PHYS_BLKNUM, blknum_str,
-                               FSLOG_KEY_LOG_BLKNUM, lblknum_str,
-                               NULL);
-       
-       /* Access the vnode for this buffer */
-       vp = buf_vnode(bp);
-       if (vp) {
-               struct vfsstatfs *sp;
-               mount_t mp;
-               char *path;
-               int len;
-               struct vfs_context context;
-
-               mp = vnode_mount(vp);
-               /* mp should be NULL only for bdevvp during boot */
-               if (mp == NULL) {
-                       goto out;
-               }
-               sp = vfs_statfs(mp);
-
-               /* Access the file path */
-               MALLOC(path, char *, MAXPATHLEN, M_TEMP, M_WAITOK);
-               if (path) {
-                       len = MAXPATHLEN;
-                       context.vc_thread = current_thread();
-                       context.vc_ucred = kauth_cred_get();
-                       /* Find path without entering file system */
-                       err = build_path(vp, path, len, &len, BUILDPATH_NO_FS_ENTER,
-                                        &context);     
-                       if (!err) {
-                               err = escape_str(path, len, MAXPATHLEN);
-                               if (!err) {
-                                       /* Print device node, mount point, path */
-                                       msg_id = fslog_err(msg_id | FSLOG_MSG_LAST, 
-                                               FSLOG_KEY_DEVNODE, sp->f_mntfromname,
-                                               FSLOG_KEY_MNTPT, sp->f_mntonname, 
-                                               FSLOG_KEY_PATH, path, 
-                                               NULL);
-                                       print_last = 1;
-                               }
-                       }
-                       FREE(path, M_TEMP);
-               } 
-
-               if (print_last == 0) {
-                       /* Print device node and mount point */
-                       msg_id = fslog_err(msg_id | FSLOG_MSG_LAST, 
-                                       FSLOG_KEY_DEVNODE, sp->f_mntfromname,
-                                       FSLOG_KEY_MNTPT, sp->f_mntonname, 
-                                       NULL);
-                       print_last = 1;
-               } 
+       const size_t nmlen = 2 * MAXCOMLEN + 1;
+       char nm[nmlen] = {};
+       proc_selfname(nm, nmlen);
+       if (escape_str(nm, strlen(nm) + 1, nmlen)) {
+               snprintf(nm, nmlen, "(a.out)");

        }
 
        }
 

-out:
-       if (print_last == 0) {
-               msg_id = fslog_err(msg_id | FSLOG_MSG_LAST, NULL);
+       const size_t slen = 8 + 1 + 8 + 1;
+       char xcptstr[slen], csrstr[slen];
+
+       snprintf(xcptstr, slen, "%x.%x", code, xcpt);
+       if (ctrl == stat) {
+               snprintf(csrstr, slen, "%x", ctrl);
+       } else {
+               snprintf(csrstr, slen, "%x.%x", ctrl, stat);

        }
 
        }
 

-       return;
+#if DEVELOPMENT || DEBUG
+       printf("%s[%d]: com.apple.kernel.fpx: %s, %s\n",
+           nm, proc_pid(p), xcptstr, csrstr);
+#endif
+       kern_asl_msg(LOG_DEBUG, "messagetracer", 5,
+           /* 0 */ "com.apple.message.domain", "com.apple.kernel.fpx",
+           /* 1 */ "com.apple.message.signature", nm,
+           /* 2 */ "com.apple.message.signature2", xcptstr,
+           /* 3 */ "com.apple.message.value", csrstr,
+           /* 4 */ "com.apple.message.summarize", "YES",
+           NULL);
+}
+
+#else
+
+void
+fpxlog_init(void)
+{

 }
 }

+
+#endif /* __x86_64__ */