6992112349
Extend the ino_t, dev_t, nlink_t types to 64-bit ints. Modify struct dirent layout to add d_off, increase the size of d_fileno to 64-bits, increase the size of d_namlen to 16-bits, and change the required alignment. Increase struct statfs f_mntfromname[] and f_mntonname[] array length MNAMELEN to 1024. ABI breakage is mitigated by providing compatibility using versioned symbols, ingenious use of the existing padding in structures, and by employing other tricks. Unfortunately, not everything can be fixed, especially outside the base system. For instance, third-party APIs which pass struct stat around are broken in backward and forward incompatible ways. Kinfo sysctl MIBs ABI is changed in backward-compatible way, but there is no general mechanism to handle other sysctl MIBS which return structures where the layout has changed. It was considered that the breakage is either in the management interfaces, where we usually allow ABI slip, or is not important. Struct xvnode changed layout, no compat shims are provided. For struct xtty, dev_t tty device member was reduced to uint32_t. It was decided that keeping ABI compat in this case is more useful than reporting 64-bit dev_t, for the sake of pstat. Update note: strictly follow the instructions in UPDATING. Build and install the new kernel with COMPAT_FREEBSD11 option enabled, then reboot, and only then install new world. Credits: The 64-bit inode project, also known as ino64, started life many years ago as a project by Gleb Kurtsou (gleb). Kirk McKusick (mckusick) then picked up and updated the patch, and acted as a flag-waver. Feedback, suggestions, and discussions were carried by Ed Maste (emaste), John Baldwin (jhb), Jilles Tjoelker (jilles), and Rick Macklem (rmacklem). Kris Moore (kris) performed an initial ports investigation followed by an exp-run by Antoine Brodin (antoine). Essential and all-embracing testing was done by Peter Holm (pho). The heavy lifting of coordinating all these efforts and bringing the project to completion were done by Konstantin Belousov (kib). Sponsored by: The FreeBSD Foundation (emaste, kib) Differential revision: https://reviews.freebsd.org/D10439
128 lines
3.9 KiB
Groff
128 lines
3.9 KiB
Groff
.\" Copyright (c) 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)acct.5 8.1 (Berkeley) 6/5/93
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.\" $FreeBSD$
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.\"
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.Dd February 13, 2017
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.Dt ACCT 5
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.Os
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.Sh NAME
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.Nm acct
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.Nd execution accounting file
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.Sh SYNOPSIS
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.In sys/types.h
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.In sys/acct.h
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.Sh DESCRIPTION
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The kernel maintains the following
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.Fa acct
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information structure for all
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processes.
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If a process terminates, and accounting is enabled,
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the kernel calls the
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.Xr acct 2
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function call to prepare and append the record
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to the accounting file.
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.Bd -literal
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#define AC_COMM_LEN 16
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/*
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* Accounting structure version 3 (current).
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* The first byte is always zero.
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* Time units are microseconds.
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*/
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struct acctv3 {
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uint8_t ac_zero; /* zero identifies new version */
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uint8_t ac_version; /* record version number */
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uint16_t ac_len; /* record length */
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char ac_comm[AC_COMM_LEN]; /* command name */
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float ac_utime; /* user time */
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float ac_stime; /* system time */
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float ac_etime; /* elapsed time */
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time_t ac_btime; /* starting time */
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uid_t ac_uid; /* user id */
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gid_t ac_gid; /* group id */
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float ac_mem; /* average memory usage */
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float ac_io; /* count of IO blocks */
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__dev_t ac_tty; /* controlling tty */
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uint16_t ac_len2; /* record length */
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union {
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uint32_t ac_align; /* force v1 compatible alignment */
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#define AFORK 0x01 /* forked but not exec'ed */
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/* ASU is no longer supported */
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#define ASU 0x02 /* used super-user permissions */
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#define ACOMPAT 0x04 /* used compatibility mode */
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#define ACORE 0x08 /* dumped core */
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#define AXSIG 0x10 /* killed by a signal */
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#define ANVER 0x20 /* new record version */
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uint8_t ac_flag; /* accounting flags */
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} ac_trailer;
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#define ac_flagx ac_trailer.ac_flag
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};
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.Ed
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.Pp
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If a terminated process was created by an
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.Xr execve 2 ,
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the name of the executed file (at most ten characters of it)
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is saved in the field
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.Fa ac_comm
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and its status is saved by setting one of more of the following flags in
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.Fa ac_flag :
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.Dv AFORK ,
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.Dv ACOMPAT ,
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.Dv ACORE
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and
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.Dv ASIG .
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.Dv ASU
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is no longer supported.
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.Dv ANVER
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is always set in the above structure.
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.Sh SEE ALSO
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.Xr lastcomm 1 ,
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.Xr acct 2 ,
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.Xr execve 2 ,
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.Xr sa 8
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.Sh HISTORY
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A
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.Nm
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file format appeared in
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.At v7 .
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The current record format was introduced on May 2007.
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It is backwards compatible with the previous format,
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which is still documented in
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.In sys/acct.h
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and supported by
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.Xr lastcomm 1
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and
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.Xr sa 8 .
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