UPDATING revision 249665
1Updating Information for FreeBSD current users 2 3This file is maintained and copyrighted by M. Warner Losh <imp@freebsd.org>. 4See end of file for further details. For commonly done items, please see the 5COMMON ITEMS: section later in the file. These instructions assume that you 6basically know what you are doing. If not, then please consult the FreeBSD 7handbook: 8 9 http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html 10 11Items affecting the ports and packages system can be found in 12/usr/ports/UPDATING. Please read that file before running portupgrade. 13 14NOTE: FreeBSD has switched from gcc to clang. If you have trouble bootstrapping 15from older versions of FreeBSD, try WITHOUT_CLANG and WITHOUT_CLANG_IS_CC to 16bootstrap to tip of head, and then rebuild without those options. The bootstrap 17process from older version of current is a bit fragile. 18 19NOTE TO PEOPLE WHO THINK THAT FreeBSD 10.x IS SLOW: 20 FreeBSD 10.x has many debugging features turned on, in both the kernel 21 and userland. These features attempt to detect incorrect use of 22 system primitives, and encourage loud failure through extra sanity 23 checking and fail stop semantics. They also substantially impact 24 system performance. If you want to do performance measurement, 25 benchmarking, and optimization, you'll want to turn them off. This 26 includes various WITNESS- related kernel options, INVARIANTS, malloc 27 debugging flags in userland, and various verbose features in the 28 kernel. Many developers choose to disable these features on build 29 machines to maximize performance. (To completely disable malloc 30 debugging, define MALLOC_PRODUCTION in /etc/make.conf, or to merely 31 disable the most expensive debugging functionality run 32 "ln -s 'abort:false,junk:false' /etc/malloc.conf".) 33 3420130404: 35 Legacy ATA stack, disabled and replaced by new CAM-based one since 36 FreeBSD 9.0, completely removed from the sources. Kernel modules 37 atadisk and atapi*, user-level tools atacontrol and burncd are 38 removed. Kernel option `options ATA_CAM` is now permanently enabled 39 and removed. 40 4120130319: 42 SOCK_CLOEXEC and SOCK_NONBLOCK flags have been added to socket(2) 43 and socketpair(2). Software, in particular Kerberos, may 44 automatically detect and use these during building. The resulting 45 binaries will not work on older kernels. 46 4720130308: 48 CTL_DISABLE has also been added to the sparc64 GENERIC (for further 49 information, see the respective 20130304 entry). 50 5120130304: 52 Recent commits to callout(9) changed the size of struct callout, 53 so the KBI is probably heavily disturbed. Also, some functions 54 in callout(9)/sleep(9)/sleepqueue(9)/condvar(9) KPIs were replaced 55 by macros. Every kernel module using it won't load, so rebuild 56 is requested. 57 58 The ctl device has been re-enabled in GENERIC for i386 and amd64, 59 but does not initialize by default (because of the new CTL_DISABLE 60 option) to save memory. To re-enable it, remove the CTL_DISABLE 61 option from the kernel config file or set kern.cam.ctl.disable=0 62 in /boot/loader.conf. 63 6420130301: 65 The ctl device has been disabled in GENERIC for i386 and amd64. 66 This was done due to the extra memory being allocated at system 67 initialisation time by the ctl driver which was only used if 68 a CAM target device was created. This makes a FreeBSD system 69 unusable on 128MB or less of RAM. 70 7120130208: 72 A new compression method (lz4) has been merged to -HEAD. Please 73 refer to zpool-features(7) for more information. 74 75 Please refer to the "ZFS notes" section of this file for information 76 on upgrading boot ZFS pools. 77 7820130129: 79 A BSD-licensed patch(1) variant has been added and is installed 80 as bsdpatch, being the GNU version the default patch. 81 To inverse the logic and use the BSD-licensed one as default, 82 while having the GNU version installed as gnupatch, rebuild 83 and install world with the WITH_BSD_PATCH knob set. 84 8520130118: 86 The install(1) option -M has changed meaning and now takes an 87 argument that is a file or path to append logs to. In the 88 unlikely event that -M was the last option on the command line 89 and the command line contained at least two files and a target 90 directory the first file will have logs appended to it. The -M 91 option served little practical purpose in the last decade so its 92 use is expected to be extremely rare. 93 9420121223: 95 After switching to Clang as the default compiler some users of ZFS 96 on i386 systems started to experience stack overflow kernel panics. 97 Please consider using 'options KSTACK_PAGES=4' in such configurations. 98 9920121222: 100 GEOM_LABEL now mangles label names read from file system metadata. 101 Mangling affect labels containing spaces, non-printable characters, 102 '%' or '"'. Device names in /etc/fstab and other places may need to 103 be updated. 104 10520121217: 106 By default, only the 10 most recent kernel dumps will be saved. To 107 restore the previous behaviour (no limit on the number of kernel dumps 108 stored in the dump directory) add the following line to /etc/rc.conf: 109 110 savecore_flags="" 111 11220121201: 113 With the addition of auditdistd(8), a new auditdistd user is now 114 depended on during installworld. "mergemaster -p" can be used to add 115 the user prior to installworld, as documented in the handbook. 116 11720121117: 118 The sin6_scope_id member variable in struct sockaddr_in6 is now 119 filled by the kernel before passing the structure to the userland via 120 sysctl or routing socket. This means the KAME-specific embedded scope 121 id in sin6_addr.s6_addr[2] is always cleared in userland application. 122 This behavior can be controlled by net.inet6.ip6.deembed_scopeid. 123 __FreeBSD_version is bumped to 1000025. 124 12520121105: 126 On i386 and amd64 systems WITH_CLANG_IS_CC is now the default. 127 This means that the world and kernel will be compiled with clang 128 and that clang will be installed as /usr/bin/cc, /usr/bin/c++, 129 and /usr/bin/cpp. To disable this behavior and revert to building 130 with gcc, compile with WITHOUT_CLANG_IS_CC. 131 13220121102: 133 The IPFIREWALL_FORWARD kernel option has been removed. Its 134 functionality now turned on by default. 135 13620121023: 137 The ZERO_COPY_SOCKET kernel option has been removed and 138 split into SOCKET_SEND_COW and SOCKET_RECV_PFLIP. 139 NB: SOCKET_SEND_COW uses the VM page based copy-on-write 140 mechanism which is not safe and may result in kernel crashes. 141 NB: The SOCKET_RECV_PFLIP mechanism is useless as no current 142 driver supports disposeable external page sized mbuf storage. 143 Proper replacements for both zero-copy mechanisms are under 144 consideration and will eventually lead to complete removal 145 of the two kernel options. 146 14720121023: 148 The IPv4 network stack has been converted to network byte 149 order. The following modules need to be recompiled together 150 with kernel: carp(4), divert(4), gif(4), siftr(4), gre(4), 151 pf(4), ipfw(4), ng_ipfw(4), stf(4). 152 15320121022: 154 Support for non-MPSAFE filesystems was removed from VFS. The 155 VFS_VERSION was bumped, all filesystem modules shall be 156 recompiled. 157 15820121018: 159 All the non-MPSAFE filesystems have been disconnected from 160 the build. The full list includes: codafs, hpfs, ntfs, nwfs, 161 portalfs, smbfs, xfs. 162 16320121016: 164 The interface cloning API and ABI has changed. The following 165 modules need to be recompiled together with kernel: 166 ipfw(4), pfsync(4), pflog(4), usb(4), wlan(4), stf(4), 167 vlan(4), disc(4), edsc(4), if_bridge(4), gif(4), tap(4), 168 faith(4), epair(4), enc(4), tun(4), if_lagg(4), gre(4). 169 17020121015: 171 The sdhci driver was split in two parts: sdhci (generic SD Host 172 Controller logic) and sdhci_pci (actual hardware driver). 173 No kernel config modifications are required, but if you 174 load sdhc as a module you must switch to sdhci_pci instead. 175 17620121014: 177 Import the FUSE kernel and userland support into base system. 178 17920121013: 180 The GNU sort(1) program has been removed since the BSD-licensed 181 sort(1) has been the default for quite some time and no serious 182 problems have been reported. The corresponding WITH_GNU_SORT 183 knob has also gone. 184 18520121006: 186 The pfil(9) API/ABI for AF_INET family has been changed. Packet 187 filtering modules: pf(4), ipfw(4), ipfilter(4) need to be recompiled 188 with new kernel. 189 19020121001: 191 The net80211(4) ABI has been changed to allow for improved driver 192 PS-POLL and power-save support. All wireless drivers need to be 193 recompiled to work with the new kernel. 194 19520120913: 196 The random(4) support for the VIA hardware random number 197 generator (`PADLOCK') is no longer enabled unconditionally. 198 Add the PADLOCK_RNG option in the custom kernel config if 199 needed. The GENERIC kernels on i386 and amd64 do include the 200 option, so the change only affects the custom kernel 201 configurations. 202 20320120908: 204 The pf(4) packet filter ABI has been changed. pfctl(8) and 205 snmp_pf module need to be recompiled to work with new kernel. 206 20720120828: 208 A new ZFS feature flag "com.delphix:empty_bpobj" has been merged 209 to -HEAD. Pools that have empty_bpobj in active state can not be 210 imported read-write with ZFS implementations that do not support 211 this feature. For more information read the zpool-features(5) 212 manual page. 213 21420120727: 215 The sparc64 ZFS loader has been changed to no longer try to auto- 216 detect ZFS providers based on diskN aliases but now requires these 217 to be explicitly listed in the OFW boot-device environment variable. 218 21920120712: 220 The OpenSSL has been upgraded to 1.0.1c. Any binaries requiring 221 libcrypto.so.6 or libssl.so.6 must be recompiled. Also, there are 222 configuration changes. Make sure to merge /etc/ssl/openssl.cnf. 223 22420120712: 225 The following sysctls and tunables have been renamed for consistency 226 with other variables: 227 kern.cam.da.da_send_ordered -> kern.cam.da.send_ordered 228 kern.cam.ada.ada_send_ordered -> kern.cam.ada.send_ordered 229 23020120628: 231 The sort utility has been replaced with BSD sort. For now, GNU sort 232 is also available as "gnusort" or the default can be set back to 233 GNU sort by setting WITH_GNU_SORT. In this case, BSD sort will be 234 installed as "bsdsort". 235 23620120611: 237 A new version of ZFS (pool version 5000) has been merged to -HEAD. 238 Starting with this version the old system of ZFS pool versioning 239 is superseded by "feature flags". This concept enables forward 240 compatibility against certain future changes in functionality of ZFS 241 pools. The first read-only compatible "feature flag" for ZFS pools 242 is named "com.delphix:async_destroy". For more information 243 read the new zpool-features(5) manual page. 244 Please refer to the "ZFS notes" section of this file for information 245 on upgrading boot ZFS pools. 246 24720120417: 248 The malloc(3) implementation embedded in libc now uses sources imported 249 as contrib/jemalloc. The most disruptive API change is to 250 /etc/malloc.conf. If your system has an old-style /etc/malloc.conf, 251 delete it prior to installworld, and optionally re-create it using the 252 new format after rebooting. See malloc.conf(5) for details 253 (specifically the TUNING section and the "opt.*" entries in the MALLCTL 254 NAMESPACE section). 255 25620120328: 257 Big-endian MIPS TARGET_ARCH values no longer end in "eb". mips64eb 258 is now spelled mips64. mipsn32eb is now spelled mipsn32. mipseb is 259 now spelled mips. This is to aid compatibility with third-party 260 software that expects this naming scheme in uname(3). Little-endian 261 settings are unchanged. 262 26320120306: 264 Disable by default the option VFS_ALLOW_NONMPSAFE for all supported 265 platforms. 266 26720120229: 268 Now unix domain sockets behave "as expected" on nullfs(5). Previously 269 nullfs(5) did not pass through all behaviours to the underlying layer, 270 as a result if we bound to a socket on the lower layer we could connect 271 only to the lower path; if we bound to the upper layer we could connect 272 only to the upper path. The new behavior is one can connect to both the 273 lower and the upper paths regardless what layer path one binds to. 274 27520120211: 276 The getifaddrs upgrade path broken with 20111215 has been restored. 277 If you have upgraded in between 20111215 and 20120209 you need to 278 recompile libc again with your kernel. You still need to recompile 279 world to be able to configure CARP but this restriction already 280 comes from 20111215. 281 28220120114: 283 The set_rcvar() function has been removed from /etc/rc.subr. All 284 base and ports rc.d scripts have been updated, so if you have a 285 port installed with a script in /usr/local/etc/rc.d you can either 286 hand-edit the rcvar= line, or reinstall the port. 287 288 An easy way to handle the mass-update of /etc/rc.d: 289 rm /etc/rc.d/* && mergemaster -i 290 29120120109: 292 panic(9) now stops other CPUs in the SMP systems, disables interrupts 293 on the current CPU and prevents other threads from running. 294 This behavior can be reverted using the kern.stop_scheduler_on_panic 295 tunable/sysctl. 296 The new behavior can be incompatible with kern.sync_on_panic. 297 29820111215: 299 The carp(4) facility has been changed significantly. Configuration 300 of the CARP protocol via ifconfig(8) has changed, as well as format 301 of CARP events submitted to devd(8) has changed. See manual pages 302 for more information. The arpbalance feature of carp(4) is currently 303 not supported anymore. 304 305 Size of struct in_aliasreq, struct in6_aliasreq has changed. User 306 utilities using SIOCAIFADDR, SIOCAIFADDR_IN6, e.g. ifconfig(8), 307 need to be recompiled. 308 30920111122: 310 The acpi_wmi(4) status device /dev/wmistat has been renamed to 311 /dev/wmistat0. 312 31320111108: 314 The option VFS_ALLOW_NONMPSAFE option has been added in order to 315 explicitely support non-MPSAFE filesystems. 316 It is on by default for all supported platform at this present 317 time. 318 31920111101: 320 The broken amd(4) driver has been replaced with esp(4) in the amd64, 321 i386 and pc98 GENERIC kernel configuration files. 322 32320110930: 324 sysinstall has been removed 325 32620110923: 327 The stable/9 branch created in subversion. This corresponds to the 328 RELENG_9 branch in CVS. 329 33020110913: 331 This commit modifies vfs_register() so that it uses a hash 332 calculation to set vfc_typenum, which is enabled by default. 333 The first time a system is booted after this change, the 334 vfc_typenum values will change for all file systems. The 335 main effect of this is a change to the NFS server file handles 336 for file systems that use vfc_typenum in their fsid, such as ZFS. 337 It will, however, prevent vfc_typenum from changing when file 338 systems are loaded in a different order for subsequent reboots. 339 To disable this, you can set vfs.typenumhash=0 in /boot/loader.conf 340 until you are ready to remount all NFS clients after a reboot. 341 34220110828: 343 Bump the shared library version numbers for libraries that 344 do not use symbol versioning, have changed the ABI compared 345 to stable/8 and which shared library version was not bumped. 346 Done as part of 9.0-RELEASE cycle. 347 34820110815: 349 During the merge of Capsicum features, the fget(9) KPI was modified. 350 This may require the rebuilding of out-of-tree device drivers -- 351 issues have been reported specifically with the nVidia device driver. 352 __FreeBSD_version is bumped to 900041. 353 354 Also, there is a period between 20110811 and 20110814 where the 355 special devices /dev/{stdin,stdout,stderr} did not work correctly. 356 Building world from a kernel during that window may not work. 357 35820110628: 359 The packet filter (pf) code has been updated to OpenBSD 4.5. 360 You need to update userland tools to be in sync with kernel. 361 This update breaks backward compatibility with earlier pfsync(4) 362 versions. Care must be taken when updating redundant firewall setups. 363 36420110608: 365 The following sysctls and tunables are retired on x86 platforms: 366 machdep.hlt_cpus 367 machdep.hlt_logical_cpus 368 The following sysctl is retired: 369 machdep.hyperthreading_allowed 370 The sysctls were supposed to provide a way to dynamically offline and 371 online selected CPUs on x86 platforms, but the implementation has not 372 been reliable especially with SCHED_ULE scheduler. 373 machdep.hyperthreading_allowed tunable is still available to ignore 374 hyperthreading CPUs at OS level. 375 Individual CPUs can be disabled using hint.lapic.X.disabled tunable, 376 where X is an APIC ID of a CPU. Be advised, though, that disabling 377 CPUs in non-uniform fashion will result in non-uniform topology and 378 may lead to sub-optimal system performance with SCHED_ULE, which is 379 a default scheduler. 380 38120110607: 382 cpumask_t type is retired and cpuset_t is used in order to describe 383 a mask of CPUs. 384 38520110531: 386 Changes to ifconfig(8) for dynamic address family detection mandate 387 that you are running a kernel of 20110525 or later. Make sure to 388 follow the update procedure to boot a new kernel before installing 389 world. 390 39120110513: 392 Support for sun4v architecture is officially dropped 393 39420110503: 395 Several KPI breaking changes have been committed to the mii(4) layer, 396 the PHY drivers and consequently some Ethernet drivers using mii(4). 397 This means that miibus.ko and the modules of the affected Ethernet 398 drivers need to be recompiled. 399 400 Note to kernel developers: Given that the OUI bit reversion problem 401 was fixed as part of these changes all mii(4) commits related to OUIs, 402 i.e. to sys/dev/mii/miidevs, PHY driver probing and vendor specific 403 handling, no longer can be merged verbatim to stable/8 and previous 404 branches. 405 40620110430: 407 Users of the Atheros AR71xx SoC code now need to add 'device ar71xx_pci' 408 into their kernel configurations along with 'device pci'. 409 41020110427: 411 The default NFS client is now the new NFS client, so fstype "newnfs" 412 is now "nfs" and the regular/old NFS client is now fstype "oldnfs". 413 Although mounts via fstype "nfs" will usually work without userland 414 changes, it is recommended that the mount(8) and mount_nfs(8) 415 commands be rebuilt from sources and that a link to mount_nfs called 416 mount_oldnfs be created. The new client is compiled into the 417 kernel with "options NFSCL" and this is needed for diskless root 418 file systems. The GENERIC kernel configs have been changed to use 419 NFSCL and NFSD (the new server) instead of NFSCLIENT and NFSSERVER. 420 To use the regular/old client, you can "mount -t oldnfs ...". For 421 a diskless root file system, you must also include a line like: 422 423 vfs.root.mountfrom="oldnfs:" 424 425 in the boot/loader.conf on the root fs on the NFS server to make 426 a diskless root fs use the old client. 427 42820110424: 429 The GENERIC kernels for all architectures now default to the new 430 CAM-based ATA stack. It means that all legacy ATA drivers were 431 removed and replaced by respective CAM drivers. If you are using 432 ATA device names in /etc/fstab or other places, make sure to update 433 them respectively (adX -> adaY, acdX -> cdY, afdX -> daY, astX -> saY, 434 where 'Y's are the sequential numbers starting from zero for each type 435 in order of detection, unless configured otherwise with tunables, 436 see cam(4)). There will be symbolic links created in /dev/ to map 437 old adX devices to the respective adaY. They should provide basic 438 compatibility for file systems mounting in most cases, but they do 439 not support old user-level APIs and do not have respective providers 440 in GEOM. Consider using updated management tools with new device names. 441 442 It is possible to load devices ahci, ata, siis and mvs as modules, 443 but option ATA_CAM should remain in kernel configuration to make ata 444 module work as CAM driver supporting legacy ATA controllers. Device ata 445 still can be used in modular fashion (atacore + ...). Modules atadisk 446 and atapi* are not used and won't affect operation in ATA_CAM mode. 447 Note that to use CAM-based ATA kernel should include CAM devices 448 scbus, pass, da (or explicitly ada), cd and optionally others. All of 449 them are parts of the cam module. 450 451 ataraid(4) functionality is now supported by the RAID GEOM class. 452 To use it you can load geom_raid kernel module and use graid(8) tool 453 for management. Instead of /dev/arX device names, use /dev/raid/rX. 454 455 No kernel config options or code have been removed, so if a problem 456 arises, please report it and optionally revert to the old ATA stack. 457 In order to do it you can remove from the kernel config: 458 options ATA_CAM 459 device ahci 460 device mvs 461 device siis 462 , and instead add back: 463 device atadisk # ATA disk drives 464 device ataraid # ATA RAID drives 465 device atapicd # ATAPI CDROM drives 466 device atapifd # ATAPI floppy drives 467 device atapist # ATAPI tape drives 468 46920110423: 470 The default NFS server has been changed to the new server, which 471 was referred to as the experimental server. If you need to switch 472 back to the old NFS server, you must now put the "-o" option on 473 both the mountd and nfsd commands. This can be done using the 474 mountd_flags and nfs_server_flags rc.conf variables until an 475 update to the rc scripts is committed, which is coming soon. 476 47720110418: 478 The GNU Objective-C runtime library (libobjc), and other Objective-C 479 related components have been removed from the base system. If you 480 require an Objective-C library, please use one of the available ports. 481 48220110331: 483 ath(4) has been split into bus- and device- modules. if_ath contains 484 the HAL, the TX rate control and the network device code. if_ath_pci 485 contains the PCI bus glue. For Atheros MIPS embedded systems, if_ath_ahb 486 contains the AHB glue. Users need to load both if_ath_pci and if_ath 487 in order to use ath on everything else. 488 489 TO REPEAT: if_ath_ahb is not needed for normal users. Normal users only 490 need to load if_ath and if_ath_pci for ath(4) operation. 491 49220110314: 493 As part of the replacement of sysinstall, the process of building 494 release media has changed significantly. For details, please re-read 495 release(7), which has been updated to reflect the new build process. 496 49720110218: 498 GNU binutils 2.17.50 (as of 2007-07-03) has been merged to -HEAD. This 499 is the last available version under GPLv2. It brings a number of new 500 features, such as support for newer x86 CPU's (with SSE-3, SSSE-3, SSE 501 4.1 and SSE 4.2), better support for powerpc64, a number of new 502 directives, and lots of other small improvements. See the ChangeLog 503 file in contrib/binutils for the full details. 504 50520110218: 506 IPsec's HMAC_SHA256-512 support has been fixed to be RFC4868 507 compliant, and will now use half of hash for authentication. 508 This will break interoperability with all stacks (including all 509 actual FreeBSD versions) who implement 510 draft-ietf-ipsec-ciph-sha-256-00 (they use 96 bits of hash for 511 authentication). 512 The only workaround with such peers is to use another HMAC 513 algorithm for IPsec ("phase 2") authentication. 514 51520110207: 516 Remove the uio_yield prototype and symbol. This function has 517 been misnamed since it was introduced and should not be 518 globally exposed with this name. The equivalent functionality 519 is now available using kern_yield(curthread->td_user_pri). 520 The function remains undocumented. 521 52220110112: 523 A SYSCTL_[ADD_]UQUAD was added for unsigned uint64_t pointers, 524 symmetric with the existing SYSCTL_[ADD_]QUAD. Type checking 525 for scalar sysctls is defined but disabled. Code that needs 526 UQUAD to pass the type checking that must compile on older 527 systems where the define is not present can check against 528 __FreeBSD_version >= 900030. 529 530 The system dialog(1) has been replaced with a new version previously 531 in ports as devel/cdialog. dialog(1) is mostly command-line compatible 532 with the previous version, but the libdialog associated with it has 533 a largely incompatible API. As such, the original version of libdialog 534 will be kept temporarily as libodialog, until its base system consumers 535 are replaced or updated. Bump __FreeBSD_version to 900030. 536 53720110103: 538 If you are trying to run make universe on a -stable system, and you get 539 the following warning: 540 "Makefile", line 356: "Target architecture for i386/conf/GENERIC 541 unknown. config(8) likely too old." 542 or something similar to it, then you must upgrade your -stable system 543 to 8.2-Release or newer (really, any time after r210146 7/15/2010 in 544 stable/8) or build the config from the latest stable/8 branch and 545 install it on your system. 546 547 Prior to this date, building a current universe on 8-stable system from 548 between 7/15/2010 and 1/2/2011 would result in a weird shell parsing 549 error in the first kernel build phase. A new config on those old 550 systems will fix that problem for older versions of -current. 551 55220101228: 553 The TCP stack has been modified to allow Khelp modules to interact with 554 it via helper hook points and store per-connection data in the TCP 555 control block. Bump __FreeBSD_version to 900029. User space tools that 556 rely on the size of struct tcpcb in tcp_var.h (e.g. sockstat) need to 557 be recompiled. 558 55920101114: 560 Generic IEEE 802.3 annex 31B full duplex flow control support has been 561 added to mii(4) and bge(4), bce(4), msk(4), nfe(4) and stge(4) along 562 with brgphy(4), e1000phy(4) as well as ip1000phy() have been converted 563 to take advantage of it instead of using custom implementations. This 564 means that these drivers now no longer unconditionally advertise 565 support for flow control but only do so if flow control is a selected 566 media option. This was implemented in the generic support that way in 567 order to allow flow control to be switched on and off via ifconfig(8) 568 with the PHY specific default to typically off in order to protect 569 from unwanted effects. Consequently, if you used flow control with 570 one of the above mentioned drivers you now need to explicitly enable 571 it, for example via: 572 ifconfig bge0 media auto mediaopt flowcontrol 573 574 Along with the above mentioned changes generic support for setting 575 1000baseT master mode also has been added and brgphy(4), ciphy(4), 576 e1000phy(4) as well as ip1000phy(4) have been converted to take 577 advantage of it. This means that these drivers now no longer take the 578 link0 parameter for selecting master mode but the master media option 579 has to be used instead, for example like in the following: 580 ifconfig bge0 media 1000baseT mediaopt full-duplex,master 581 582 Selection of master mode now is also available with all other PHY 583 drivers supporting 1000baseT. 584 58520101111: 586 The TCP stack has received a significant update to add support for 587 modularised congestion control and generally improve the clarity of 588 congestion control decisions. Bump __FreeBSD_version to 900025. User 589 space tools that rely on the size of struct tcpcb in tcp_var.h (e.g. 590 sockstat) need to be recompiled. 591 59220101002: 593 The man(1) utility has been replaced by a new version that no longer 594 uses /etc/manpath.config. Please consult man.conf(5) for how to 595 migrate local entries to the new format. 596 59720100928: 598 The copyright strings printed by login(1) and sshd(8) at the time of a 599 new connection have been removed to follow other operating systems and 600 upstream sshd. 601 60220100915: 603 A workaround for a fixed ld bug has been removed in kernel code, 604 so make sure that your system ld is built from sources after 605 revision 210245 from 2010-07-19 (r211583 if building head kernel 606 on stable/8, r211584 for stable/7; both from 2010-08-21). 607 A symptom of incorrect ld version is different addresses for 608 set_pcpu section and __start_set_pcpu symbol in kernel and/or modules. 609 61020100913: 611 The $ipv6_prefer variable in rc.conf(5) has been split into 612 $ip6addrctl_policy and $ipv6_activate_all_interfaces. 613 614 The $ip6addrctl_policy is a variable to choose a pre-defined 615 address selection policy set by ip6addrctl(8). A value 616 "ipv4_prefer", "ipv6_prefer" or "AUTO" can be specified. The 617 default is "AUTO". 618 619 The $ipv6_activate_all_interfaces specifies whether IFDISABLED 620 flag (see an entry of 20090926) is set on an interface with no 621 corresponding $ifconfig_IF_ipv6 line. The default is "NO" for 622 security reason. If you want IPv6 link-local address on all 623 interfaces by default, set this to "YES". 624 625 The old ipv6_prefer="YES" is equivalent to 626 ipv6_activate_all_interfaces="YES" and 627 ip6addrctl_policy="ipv6_prefer". 628 62920100913: 630 DTrace has grown support for userland tracing. Due to this, DTrace is 631 now i386 and amd64 only. 632 dtruss(1) is now installed by default on those systems and a new 633 kernel module is needed for userland tracing: fasttrap. 634 No changes to your kernel config file are necessary to enable 635 userland tracing, but you might consider adding 'STRIP=' and 636 'CFLAGS+=-fno-omit-frame-pointer' to your make.conf if you want 637 to have informative userland stack traces in DTrace (ustack). 638 63920100725: 640 The acpi_aiboost(4) driver has been removed in favor of the new 641 aibs(4) driver. You should update your kernel configuration file. 642 64320100722: 644 BSD grep has been imported to the base system and it is built by 645 default. It is completely BSD licensed, highly GNU-compatible, uses 646 less memory than its GNU counterpart and has a small codebase. 647 However, it is slower than its GNU counterpart, which is mostly 648 noticeable for larger searches, for smaller ones it is measurable 649 but not significant. The reason is complex, the most important factor 650 is that we lack a modern and efficient regex library and GNU 651 overcomes this by optimizing the searches internally. Future work 652 on improving the regex performance is planned, for the meantime, 653 users that need better performance, can build GNU grep instead by 654 setting the WITH_GNU_GREP knob. 655 65620100713: 657 Due to the import of powerpc64 support, all existing powerpc kernel 658 configuration files must be updated with a machine directive like this: 659 machine powerpc powerpc 660 661 In addition, an updated config(8) is required to build powerpc kernels 662 after this change. 663 66420100713: 665 A new version of ZFS (version 15) has been merged to -HEAD. 666 This version uses a python library for the following subcommands: 667 zfs allow, zfs unallow, zfs groupspace, zfs userspace. 668 For full functionality of these commands the following port must 669 be installed: sysutils/py-zfs 670 67120100429: 672 'vm_page's are now hashed by physical address to an array of mutexes. 673 Currently this is only used to serialize access to hold_count. Over 674 time the page queue mutex will be peeled away. This changes the size 675 of pmap on every architecture. And requires all callers of vm_page_hold 676 and vm_page_unhold to be updated. 677 67820100402: 679 WITH_CTF can now be specified in src.conf (not recommended, there 680 are some problems with static executables), make.conf (would also 681 affect ports which do not use GNU make and do not override the 682 compile targets) or in the kernel config (via "makeoptions 683 WITH_CTF=yes"). 684 When WITH_CTF was specified there before this was silently ignored, 685 so make sure that WITH_CTF is not used in places which could lead 686 to unwanted behavior. 687 68820100311: 689 The kernel option COMPAT_IA32 has been replaced with COMPAT_FREEBSD32 690 to allow 32-bit compatibility on non-x86 platforms. All kernel 691 configurations on amd64 and ia64 platforms using these options must 692 be modified accordingly. 693 69420100113: 695 The utmp user accounting database has been replaced with utmpx, 696 the user accounting interface standardized by POSIX. 697 Unfortunately the semantics of utmp and utmpx don't match, 698 making it practically impossible to support both interfaces. 699 The user accounting database is used by tools like finger(1), 700 last(1), talk(1), w(1) and ac(8). 701 702 All applications in the base system use utmpx. This means only 703 local binaries (e.g. from the ports tree) may still use these 704 utmp database files. These applications must be rebuilt to make 705 use of utmpx. 706 707 After the system has been upgraded, it is safe to remove the old 708 log files (/var/run/utmp, /var/log/lastlog and /var/log/wtmp*), 709 assuming their contents is of no importance anymore. Old wtmp 710 databases can only be used by last(1) and ac(8) after they have 711 been converted to the new format using wtmpcvt(1). 712 71320100108: 714 Introduce the kernel thread "deadlock resolver" (which can be enabled 715 via the DEADLKRES option, see NOTES for more details) and the 716 sleepq_type() function for sleepqueues. 717 71820091202: 719 The rc.firewall and rc.firewall6 were unified, and 720 rc.firewall6 and rc.d/ip6fw were removed. 721 According to the removal of rc.d/ip6fw, ipv6_firewall_* rc 722 variables are obsoleted. Instead, the following new rc 723 variables are added to rc.d/ipfw: 724 725 firewall_client_net_ipv6, firewall_simple_iif_ipv6, 726 firewall_simple_inet_ipv6, firewall_simple_oif_ipv6, 727 firewall_simple_onet_ipv6, firewall_trusted_ipv6 728 729 The meanings correspond to the relevant IPv4 variables. 730 73120091125: 732 8.0-RELEASE. 733 73420091113: 735 The default terminal emulation for syscons(4) has been changed 736 from cons25 to xterm on all platforms except pc98. This means 737 that the /etc/ttys file needs to be updated to ensure correct 738 operation of applications on the console. 739 740 The terminal emulation style can be toggled per window by using 741 vidcontrol(1)'s -T flag. The TEKEN_CONS25 kernel configuration 742 options can be used to change the compile-time default back to 743 cons25. 744 745 To prevent graphical artifacts, make sure the TERM environment 746 variable is set to match the terminal emulation that is being 747 performed by syscons(4). 748 74920091109: 750 The layout of the structure ieee80211req_scan_result has changed. 751 Applications that require wireless scan results (e.g. ifconfig(8)) 752 from net80211 need to be recompiled. 753 754 Applications such as wpa_supplicant(8) may require a full world 755 build without using NO_CLEAN in order to get synchronized with the 756 new structure. 757 75820091025: 759 The iwn(4) driver has been updated to support the 5000 and 5150 series. 760 There's one kernel module for each firmware. Adding "device iwnfw" 761 to the kernel configuration file means including all three firmware 762 images inside the kernel. If you want to include just the one for 763 your wireless card, use the devices iwn4965fw, iwn5000fw or 764 iwn5150fw. 765 76620090926: 767 The rc.d/network_ipv6, IPv6 configuration script has been integrated 768 into rc.d/netif. The changes are the following: 769 770 1. To use IPv6, simply define $ifconfig_IF_ipv6 like $ifconfig_IF 771 for IPv4. For aliases, $ifconfig_IF_aliasN should be used. 772 Note that both variables need the "inet6" keyword at the head. 773 774 Do not set $ipv6_network_interfaces manually if you do not 775 understand what you are doing. It is not needed in most cases. 776 777 $ipv6_ifconfig_IF and $ipv6_ifconfig_IF_aliasN still work, but 778 they are obsolete. 779 780 2. $ipv6_enable is obsolete. Use $ipv6_prefer and 781 "inet6 accept_rtadv" keyword in ifconfig(8) instead. 782 783 If you define $ipv6_enable=YES, it means $ipv6_prefer=YES and 784 all configured interfaces have "inet6 accept_rtadv" in the 785 $ifconfig_IF_ipv6. These are for backward compatibility. 786 787 3. A new variable $ipv6_prefer has been added. If NO, IPv6 788 functionality of interfaces with no corresponding 789 $ifconfig_IF_ipv6 is disabled by using "inet6 ifdisabled" flag, 790 and the default address selection policy of ip6addrctl(8) 791 is the IPv4-preferred one (see rc.d/ip6addrctl for more details). 792 Note that if you want to configure IPv6 functionality on the 793 disabled interfaces after boot, first you need to clear the flag by 794 using ifconfig(8) like: 795 796 ifconfig em0 inet6 -ifdisabled 797 798 If YES, the default address selection policy is set as 799 IPv6-preferred. 800 801 The default value of $ipv6_prefer is NO. 802 803 4. If your system need to receive Router Advertisement messages, 804 define "inet6 accept_rtadv" in $ifconfig_IF_ipv6. The rc(8) 805 scripts automatically invoke rtsol(8) when the interface becomes 806 UP. The Router Advertisement messages are used for SLAAC 807 (State-Less Address AutoConfiguration). 808 80920090922: 810 802.11s D3.03 support was committed. This is incompatible with the 811 previous code, which was based on D3.0. 812 81320090912: 814 A sysctl variable net.inet6.ip6.accept_rtadv now sets the default value 815 of a per-interface flag ND6_IFF_ACCEPT_RTADV, not a global knob to 816 control whether accepting Router Advertisement messages or not. 817 Also, a per-interface flag ND6_IFF_AUTO_LINKLOCAL has been added and 818 a sysctl variable net.inet6.ip6.auto_linklocal is its default value. 819 The ifconfig(8) utility now supports these flags. 820 82120090910: 822 ZFS snapshots are now mounted with MNT_IGNORE flag. Use -v option for 823 mount(8) and -a option for df(1) to see them. 824 82520090825: 826 The old tunable hw.bus.devctl_disable has been superseded by 827 hw.bus.devctl_queue. hw.bus.devctl_disable=1 in loader.conf should be 828 replaced by hw.bus.devctl_queue=0. The default for this new tunable 829 is 1000. 830 83120090813: 832 Remove the option STOP_NMI. The default action is now to use NMI only 833 for KDB via the newly introduced function stop_cpus_hard() and 834 maintain stop_cpus() to just use a normal IPI_STOP on ia32 and amd64. 835 83620090803: 837 The stable/8 branch created in subversion. This corresponds to the 838 RELENG_8 branch in CVS. 839 84020090719: 841 Bump the shared library version numbers for all libraries that do not 842 use symbol versioning as part of the 8.0-RELEASE cycle. Bump 843 __FreeBSD_version to 800105. 844 84520090714: 846 Due to changes in the implementation of virtual network stack support, 847 all network-related kernel modules must be recompiled. As this change 848 breaks the ABI, bump __FreeBSD_version to 800104. 849 85020090713: 851 The TOE interface to the TCP syncache has been modified to remove 852 struct tcpopt (<netinet/tcp_var.h>) from the ABI of the network stack. 853 The cxgb driver is the only TOE consumer affected by this change, and 854 needs to be recompiled along with the kernel. As this change breaks 855 the ABI, bump __FreeBSD_version to 800103. 856 85720090712: 858 Padding has been added to struct tcpcb, sackhint and tcpstat in 859 <netinet/tcp_var.h> to facilitate future MFCs and bug fixes whilst 860 maintaining the ABI. However, this change breaks the ABI, so bump 861 __FreeBSD_version to 800102. User space tools that rely on the size of 862 any of these structs (e.g. sockstat) need to be recompiled. 863 86420090630: 865 The NFS_LEGACYRPC option has been removed along with the old kernel 866 RPC implementation that this option selected. Kernel configurations 867 may need to be adjusted. 868 86920090629: 870 The network interface device nodes at /dev/net/<interface> have been 871 removed. All ioctl operations can be performed the normal way using 872 routing sockets. The kqueue functionality can generally be replaced 873 with routing sockets. 874 87520090628: 876 The documentation from the FreeBSD Documentation Project (Handbook, 877 FAQ, etc.) is now installed via packages by sysinstall(8) and under 878 the /usr/local/share/doc/freebsd directory instead of /usr/share/doc. 879 88020090624: 881 The ABI of various structures related to the SYSV IPC API have been 882 changed. As a result, the COMPAT_FREEBSD[456] and COMPAT_43 kernel 883 options now all require COMPAT_FREEBSD7. Bump __FreeBSD_version to 884 800100. 885 88620090622: 887 Layout of struct vnet has changed as routing related variables were 888 moved to their own Vimage module. Modules need to be recompiled. Bump 889 __FreeBSD_version to 800099. 890 89120090619: 892 NGROUPS_MAX and NGROUPS have been increased from 16 to 1023 and 1024 893 respectively. As long as no more than 16 groups per process are used, 894 no changes should be visible. When more than 16 groups are used, old 895 binaries may fail if they call getgroups() or getgrouplist() with 896 statically sized storage. Recompiling will work around this, but 897 applications should be modified to use dynamically allocated storage 898 for group arrays as POSIX.1-2008 does not cap an implementation's 899 number of supported groups at NGROUPS_MAX+1 as previous versions did. 900 901 NFS and portalfs mounts may also be affected as the list of groups is 902 truncated to 16. Users of NFS who use more than 16 groups, should 903 take care that negative group permissions are not used on the exported 904 file systems as they will not be reliable unless a GSSAPI based 905 authentication method is used. 906 90720090616: 908 The compiling option ADAPTIVE_LOCKMGRS has been introduced. This 909 option compiles in the support for adaptive spinning for lockmgrs 910 which want to enable it. The lockinit() function now accepts the flag 911 LK_ADAPTIVE in order to make the lock object subject to adaptive 912 spinning when both held in write and read mode. 913 91420090613: 915 The layout of the structure returned by IEEE80211_IOC_STA_INFO has 916 changed. User applications that use this ioctl need to be rebuilt. 917 91820090611: 919 The layout of struct thread has changed. Kernel and modules need to 920 be rebuilt. 921 92220090608: 923 The layout of structs ifnet, domain, protosw and vnet_net has changed. 924 Kernel modules need to be rebuilt. Bump __FreeBSD_version to 800097. 925 92620090602: 927 window(1) has been removed from the base system. It can now be 928 installed from ports. The port is called misc/window. 929 93020090601: 931 The way we are storing and accessing `routing table' entries has 932 changed. Programs reading the FIB, like netstat, need to be 933 re-compiled. 934 93520090601: 936 A new netisr implementation has been added for FreeBSD 8. Network 937 file system modules, such as igmp, ipdivert, and others, should be 938 rebuilt. 939 Bump __FreeBSD_version to 800096. 940 94120090530: 942 Remove the tunable/sysctl debug.mpsafevfs as its initial purpose is no 943 more valid. 944 94520090530: 946 Add VOP_ACCESSX(9). File system modules need to be rebuilt. 947 Bump __FreeBSD_version to 800094. 948 94920090529: 950 Add mnt_xflag field to 'struct mount'. File system modules need to be 951 rebuilt. 952 Bump __FreeBSD_version to 800093. 953 95420090528: 955 The compiling option ADAPTIVE_SX has been retired while it has been 956 introduced the option NO_ADAPTIVE_SX which handles the reversed logic. 957 The KPI for sx_init_flags() changes as accepting flags: 958 SX_ADAPTIVESPIN flag has been retired while the SX_NOADAPTIVE flag has 959 been introduced in order to handle the reversed logic. 960 Bump __FreeBSD_version to 800092. 961 96220090527: 963 Add support for hierarchical jails. Remove global securelevel. 964 Bump __FreeBSD_version to 800091. 965 96620090523: 967 The layout of struct vnet_net has changed, therefore modules 968 need to be rebuilt. 969 Bump __FreeBSD_version to 800090. 970 97120090523: 972 The newly imported zic(8) produces a new format in the output. Please 973 run tzsetup(8) to install the newly created data to /etc/localtime. 974 97520090520: 976 The sysctl tree for the usb stack has renamed from hw.usb2.* to 977 hw.usb.* and is now consistent again with previous releases. 978 97920090520: 980 802.11 monitor mode support was revised and driver api's were changed. 981 Drivers dependent on net80211 now support DLT_IEEE802_11_RADIO instead 982 of DLT_IEEE802_11. No user-visible data structures were changed but 983 applications that use DLT_IEEE802_11 may require changes. 984 Bump __FreeBSD_version to 800088. 985 98620090430: 987 The layout of the following structs has changed: sysctl_oid, 988 socket, ifnet, inpcbinfo, tcpcb, syncache_head, vnet_inet, 989 vnet_inet6 and vnet_ipfw. Most modules need to be rebuild or 990 panics may be experienced. World rebuild is required for 991 correctly checking networking state from userland. 992 Bump __FreeBSD_version to 800085. 993 99420090429: 995 MLDv2 and Source-Specific Multicast (SSM) have been merged 996 to the IPv6 stack. VIMAGE hooks are in but not yet used. 997 The implementation of SSM within FreeBSD's IPv6 stack closely 998 follows the IPv4 implementation. 999 1000 For kernel developers: 1001 1002 * The most important changes are that the ip6_output() and 1003 ip6_input() paths no longer take the IN6_MULTI_LOCK, 1004 and this lock has been downgraded to a non-recursive mutex. 1005 1006 * As with the changes to the IPv4 stack to support SSM, filtering 1007 of inbound multicast traffic must now be performed by transport 1008 protocols within the IPv6 stack. This does not apply to TCP and 1009 SCTP, however, it does apply to UDP in IPv6 and raw IPv6. 1010 1011 * The KPIs used by IPv6 multicast are similar to those used by 1012 the IPv4 stack, with the following differences: 1013 * im6o_mc_filter() is analogous to imo_multicast_filter(). 1014 * The legacy KAME entry points in6_joingroup and in6_leavegroup() 1015 are shimmed to in6_mc_join() and in6_mc_leave() respectively. 1016 * IN6_LOOKUP_MULTI() has been deprecated and removed. 1017 * IPv6 relies on MLD for the DAD mechanism. KAME's internal KPIs 1018 for MLDv1 have an additional 'timer' argument which is used to 1019 jitter the initial membership report for the solicited-node 1020 multicast membership on-link. 1021 * This is not strictly needed for MLDv2, which already jitters 1022 its report transmissions. However, the 'timer' argument is 1023 preserved in case MLDv1 is active on the interface. 1024 1025 * The KAME linked-list based IPv6 membership implementation has 1026 been refactored to use a vector similar to that used by the IPv4 1027 stack. 1028 Code which maintains a list of its own multicast memberships 1029 internally, e.g. carp, has been updated to reflect the new 1030 semantics. 1031 1032 * There is a known Lock Order Reversal (LOR) due to in6_setscope() 1033 acquiring the IF_AFDATA_LOCK and being called within ip6_output(). 1034 Whilst MLDv2 tries to avoid this otherwise benign LOR, it is an 1035 implementation constraint which needs to be addressed in HEAD. 1036 1037 For application developers: 1038 1039 * The changes are broadly similar to those made for the IPv4 1040 stack. 1041 1042 * The use of IPv4 and IPv6 multicast socket options on the same 1043 socket, using mapped addresses, HAS NOT been tested or supported. 1044 1045 * There are a number of issues with the implementation of various 1046 IPv6 multicast APIs which need to be resolved in the API surface 1047 before the implementation is fully compatible with KAME userland 1048 use, and these are mostly to do with interface index treatment. 1049 1050 * The literature available discusses the use of either the delta / ASM 1051 API with setsockopt(2)/getsockopt(2), or the full-state / ASM API 1052 using setsourcefilter(3)/getsourcefilter(3). For more information 1053 please refer to RFC 3768, 'Socket Interface Extensions for 1054 Multicast Source Filters'. 1055 1056 * Applications which use the published RFC 3678 APIs should be fine. 1057 1058 For systems administrators: 1059 1060 * The mtest(8) utility has been refactored to support IPv6, in 1061 addition to IPv4. Interface addresses are no longer accepted 1062 as arguments, their names must be used instead. The utility 1063 will map the interface name to its first IPv4 address as 1064 returned by getifaddrs(3). 1065 1066 * The ifmcstat(8) utility has also been updated to print the MLDv2 1067 endpoint state and source filter lists via sysctl(3). 1068 1069 * The net.inet6.ip6.mcast.loop sysctl may be tuned to 0 to disable 1070 loopback of IPv6 multicast datagrams by default; it defaults to 1 1071 to preserve the existing behaviour. Disabling multicast loopback is 1072 recommended for optimal system performance. 1073 1074 * The IPv6 MROUTING code has been changed to examine this sysctl 1075 instead of attempting to perform a group lookup before looping 1076 back forwarded datagrams. 1077 1078 Bump __FreeBSD_version to 800084. 1079 108020090422: 1081 Implement low-level Bluetooth HCI API. 1082 Bump __FreeBSD_version to 800083. 1083 108420090419: 1085 The layout of struct malloc_type, used by modules to register new 1086 memory allocation types, has changed. Most modules will need to 1087 be rebuilt or panics may be experienced. 1088 Bump __FreeBSD_version to 800081. 1089 109020090415: 1091 Anticipate overflowing inp_flags - add inp_flags2. 1092 This changes most offsets in inpcb, so checking v4 connection 1093 state will require a world rebuild. 1094 Bump __FreeBSD_version to 800080. 1095 109620090415: 1097 Add an llentry to struct route and struct route_in6. Modules 1098 embedding a struct route will need to be recompiled. 1099 Bump __FreeBSD_version to 800079. 1100 110120090414: 1102 The size of rt_metrics_lite and by extension rtentry has changed. 1103 Networking administration apps will need to be recompiled. 1104 The route command now supports show as an alias for get, weighting 1105 of routes, sticky and nostick flags to alter the behavior of stateful 1106 load balancing. 1107 Bump __FreeBSD_version to 800078. 1108 110920090408: 1110 Do not use Giant for kbdmux(4) locking. This is wrong and 1111 apparently causing more problems than it solves. This will 1112 re-open the issue where interrupt handlers may race with 1113 kbdmux(4) in polling mode. Typical symptoms include (but 1114 not limited to) duplicated and/or missing characters when 1115 low level console functions (such as gets) are used while 1116 interrupts are enabled (for example geli password prompt, 1117 mountroot prompt etc.). Disabling kbdmux(4) may help. 1118 111920090407: 1120 The size of structs vnet_net, vnet_inet and vnet_ipfw has changed; 1121 kernel modules referencing any of the above need to be recompiled. 1122 Bump __FreeBSD_version to 800075. 1123 112420090320: 1125 GEOM_PART has become the default partition slicer for storage devices, 1126 replacing GEOM_MBR, GEOM_BSD, GEOM_PC98 and GEOM_GPT slicers. It 1127 introduces some changes: 1128 1129 MSDOS/EBR: the devices created from MSDOS extended partition entries 1130 (EBR) can be named differently than with GEOM_MBR and are now symlinks 1131 to devices with offset-based names. fstabs may need to be modified. 1132 1133 BSD: the "geometry does not match label" warning is harmless in most 1134 cases but it points to problems in file system misalignment with 1135 disk geometry. The "c" partition is now implicit, covers the whole 1136 top-level drive and cannot be (mis)used by users. 1137 1138 General: Kernel dumps are now not allowed to be written to devices 1139 whose partition types indicate they are meant to be used for file 1140 systems (or, in case of MSDOS partitions, as something else than 1141 the "386BSD" type). 1142 1143 Most of these changes date approximately from 200812. 1144 114520090319: 1146 The uscanner(4) driver has been removed from the kernel. This follows 1147 Linux removing theirs in 2.6 and making libusb the default interface 1148 (supported by sane). 1149 115020090319: 1151 The multicast forwarding code has been cleaned up. netstat(1) 1152 only relies on KVM now for printing bandwidth upcall meters. 1153 The IPv4 and IPv6 modules are split into ip_mroute_mod and 1154 ip6_mroute_mod respectively. The config(5) options for statically 1155 compiling this code remain the same, i.e. 'options MROUTING'. 1156 115720090315: 1158 Support for the IFF_NEEDSGIANT network interface flag has been 1159 removed, which means that non-MPSAFE network device drivers are no 1160 longer supported. In particular, if_ar, if_sr, and network device 1161 drivers from the old (legacy) USB stack can no longer be built or 1162 used. 1163 116420090313: 1165 POSIX.1 Native Language Support (NLS) has been enabled in libc and 1166 a bunch of new language catalog files have also been added. 1167 This means that some common libc messages are now localized and 1168 they depend on the LC_MESSAGES environmental variable. 1169 117020090313: 1171 The k8temp(4) driver has been renamed to amdtemp(4) since 1172 support for Family 10 and Family 11 CPU families was added. 1173 117420090309: 1175 IGMPv3 and Source-Specific Multicast (SSM) have been merged 1176 to the IPv4 stack. VIMAGE hooks are in but not yet used. 1177 1178 For kernel developers, the most important changes are that the 1179 ip_output() and ip_input() paths no longer take the IN_MULTI_LOCK(), 1180 and this lock has been downgraded to a non-recursive mutex. 1181 1182 Transport protocols (UDP, Raw IP) are now responsible for filtering 1183 inbound multicast traffic according to group membership and source 1184 filters. The imo_multicast_filter() KPI exists for this purpose. 1185 Transports which do not use multicast (SCTP, TCP) already reject 1186 multicast by default. Forwarding and receive performance may improve 1187 as a mutex acquisition is no longer needed in the ip_input() 1188 low-level input path. in_addmulti() and in_delmulti() are shimmed 1189 to new KPIs which exist to support SSM in-kernel. 1190 1191 For application developers, it is recommended that loopback of 1192 multicast datagrams be disabled for best performance, as this 1193 will still cause the lock to be taken for each looped-back 1194 datagram transmission. The net.inet.ip.mcast.loop sysctl may 1195 be tuned to 0 to disable loopback by default; it defaults to 1 1196 to preserve the existing behaviour. 1197 1198 For systems administrators, to obtain best performance with 1199 multicast reception and multiple groups, it is always recommended 1200 that a card with a suitably precise hash filter is used. Hash 1201 collisions will still result in the lock being taken within the 1202 transport protocol input path to check group membership. 1203 1204 If deploying FreeBSD in an environment with IGMP snooping switches, 1205 it is recommended that the net.inet.igmp.sendlocal sysctl remain 1206 enabled; this forces 224.0.0.0/24 group membership to be announced 1207 via IGMP. 1208 1209 The size of 'struct igmpstat' has changed; netstat needs to be 1210 recompiled to reflect this. 1211 Bump __FreeBSD_version to 800070. 1212 121320090309: 1214 libusb20.so.1 is now installed as libusb.so.1 and the ports system 1215 updated to use it. This requires a buildworld/installworld in order to 1216 update the library and dependencies (usbconfig, etc). Its advisable to 1217 rebuild all ports which uses libusb. More specific directions are given 1218 in the ports collection UPDATING file. Any /etc/libmap.conf entries for 1219 libusb are no longer required and can be removed. 1220 122120090302: 1222 A workaround is committed to allow the creation of System V shared 1223 memory segment of size > 2 GB on the 64-bit architectures. 1224 Due to a limitation of the existing ABI, the shm_segsz member 1225 of the struct shmid_ds, returned by shmctl(IPC_STAT) call is 1226 wrong for large segments. Note that limits must be explicitly 1227 raised to allow such segments to be created. 1228 122920090301: 1230 The layout of struct ifnet has changed, requiring a rebuild of all 1231 network device driver modules. 1232 123320090227: 1234 The /dev handling for the new USB stack has changed, a 1235 buildworld/installworld is required for libusb20. 1236 123720090223: 1238 The new USB2 stack has now been permanently moved in and all kernel and 1239 module names reverted to their previous values (eg, usb, ehci, ohci, 1240 ums, ...). The old usb stack can be compiled in by prefixing the name 1241 with the letter 'o', the old usb modules have been removed. 1242 Updating entry 20090216 for xorg and 20090215 for libmap may still 1243 apply. 1244 124520090217: 1246 The rc.conf(5) option if_up_delay has been renamed to 1247 defaultroute_delay to better reflect its purpose. If you have 1248 customized this setting in /etc/rc.conf you need to update it to 1249 use the new name. 1250 125120090216: 1252 xorg 7.4 wants to configure its input devices via hald which does not 1253 yet work with USB2. If the keyboard/mouse does not work in xorg then 1254 add 1255 Option "AllowEmptyInput" "off" 1256 to your ServerLayout section. This will cause X to use the configured 1257 kbd and mouse sections from your xorg.conf. 1258 125920090215: 1260 The GENERIC kernels for all architectures now default to the new USB2 1261 stack. No kernel config options or code have been removed so if a 1262 problem arises please report it and optionally revert to the old USB 1263 stack. If you are loading USB kernel modules or have a custom kernel 1264 that includes GENERIC then ensure that usb names are also changed over, 1265 eg uftdi -> usb2_serial_ftdi. 1266 1267 Older programs linked against the ports libusb 0.1 need to be 1268 redirected to the new stack's libusb20. /etc/libmap.conf can 1269 be used for this: 1270 # Map old usb library to new one for usb2 stack 1271 libusb-0.1.so.8 libusb20.so.1 1272 127320090209: 1274 All USB ethernet devices now attach as interfaces under the name ueN 1275 (eg. ue0). This is to provide a predictable name as vendors often 1276 change usb chipsets in a product without notice. 1277 127820090203: 1279 The ichsmb(4) driver has been changed to require SMBus slave 1280 addresses be left-justified (xxxxxxx0b) rather than right-justified. 1281 All of the other SMBus controller drivers require left-justified 1282 slave addresses, so this change makes all the drivers provide the 1283 same interface. 1284 128520090201: 1286 INET6 statistics (struct ip6stat) was updated. 1287 netstat(1) needs to be recompiled. 1288 128920090119: 1290 NTFS has been removed from GENERIC kernel on amd64 to match 1291 GENERIC on i386. Should not cause any issues since mount_ntfs(8) 1292 will load ntfs.ko module automatically when NTFS support is 1293 actually needed, unless ntfs.ko is not installed or security 1294 level prohibits loading kernel modules. If either is the case, 1295 "options NTFS" has to be added into kernel config. 1296 129720090115: 1298 TCP Appropriate Byte Counting (RFC 3465) support added to kernel. 1299 New field in struct tcpcb breaks ABI, so bump __FreeBSD_version to 1300 800061. User space tools that rely on the size of struct tcpcb in 1301 tcp_var.h (e.g. sockstat) need to be recompiled. 1302 130320081225: 1304 ng_tty(4) module updated to match the new TTY subsystem. 1305 Due to API change, user-level applications must be updated. 1306 New API support added to mpd5 CVS and expected to be present 1307 in next mpd5.3 release. 1308 130920081219: 1310 With __FreeBSD_version 800060 the makefs tool is part of 1311 the base system (it was a port). 1312 131320081216: 1314 The afdata and ifnet locks have been changed from mutexes to 1315 rwlocks, network modules will need to be re-compiled. 1316 131720081214: 1318 __FreeBSD_version 800059 incorporates the new arp-v2 rewrite. 1319 RTF_CLONING, RTF_LLINFO and RTF_WASCLONED flags are eliminated. 1320 The new code reduced struct rtentry{} by 16 bytes on 32-bit 1321 architecture and 40 bytes on 64-bit architecture. The userland 1322 applications "arp" and "ndp" have been updated accordingly. 1323 The output from "netstat -r" shows only routing entries and 1324 none of the L2 information. 1325 132620081130: 1327 __FreeBSD_version 800057 marks the switchover from the 1328 binary ath hal to source code. Users must add the line: 1329 1330 options AH_SUPPORT_AR5416 1331 1332 to their kernel config files when specifying: 1333 1334 device ath_hal 1335 1336 The ath_hal module no longer exists; the code is now compiled 1337 together with the driver in the ath module. It is now 1338 possible to tailor chip support (i.e. reduce the set of chips 1339 and thereby the code size); consult ath_hal(4) for details. 1340 134120081121: 1342 __FreeBSD_version 800054 adds memory barriers to 1343 <machine/atomic.h>, new interfaces to ifnet to facilitate 1344 multiple hardware transmit queues for cards that support 1345 them, and a lock-less ring-buffer implementation to 1346 enable drivers to more efficiently manage queueing of 1347 packets. 1348 134920081117: 1350 A new version of ZFS (version 13) has been merged to -HEAD. 1351 This version has zpool attribute "listsnapshots" off by 1352 default, which means "zfs list" does not show snapshots, 1353 and is the same as Solaris behavior. 1354 135520081028: 1356 dummynet(4) ABI has changed. ipfw(8) needs to be recompiled. 1357 135820081009: 1359 The uhci, ohci, ehci and slhci USB Host controller drivers have 1360 been put into separate modules. If you load the usb module 1361 separately through loader.conf you will need to load the 1362 appropriate *hci module as well. E.g. for a UHCI-based USB 2.0 1363 controller add the following to loader.conf: 1364 1365 uhci_load="YES" 1366 ehci_load="YES" 1367 136820081009: 1369 The ABI used by the PMC toolset has changed. Please keep 1370 userland (libpmc(3)) and the kernel module (hwpmc(4)) in 1371 sync. 1372 137320081009: 1374 atapci kernel module now includes only generic PCI ATA 1375 driver. AHCI driver moved to ataahci kernel module. 1376 All vendor-specific code moved into separate kernel modules: 1377 ataacard, ataacerlabs, ataadaptec, ataamd, ataati, atacenatek, 1378 atacypress, atacyrix, atahighpoint, ataintel, ataite, atajmicron, 1379 atamarvell, atamicron, atanational, atanetcell, atanvidia, 1380 atapromise, ataserverworks, atasiliconimage, atasis, atavia 1381 138220080820: 1383 The TTY subsystem of the kernel has been replaced by a new 1384 implementation, which provides better scalability and an 1385 improved driver model. Most common drivers have been migrated to 1386 the new TTY subsystem, while others have not. The following 1387 drivers have not yet been ported to the new TTY layer: 1388 1389 PCI/ISA: 1390 cy, digi, rc, rp, sio 1391 1392 USB: 1393 ubser, ucycom 1394 1395 Line disciplines: 1396 ng_h4, ng_tty, ppp, sl, snp 1397 1398 Adding these drivers to your kernel configuration file shall 1399 cause compilation to fail. 1400 140120080818: 1402 ntpd has been upgraded to 4.2.4p5. 1403 140420080801: 1405 OpenSSH has been upgraded to 5.1p1. 1406 1407 For many years, FreeBSD's version of OpenSSH preferred DSA 1408 over RSA for host and user authentication keys. With this 1409 upgrade, we've switched to the vendor's default of RSA over 1410 DSA. This may cause upgraded clients to warn about unknown 1411 host keys even for previously known hosts. Users should 1412 follow the usual procedure for verifying host keys before 1413 accepting the RSA key. 1414 1415 This can be circumvented by setting the "HostKeyAlgorithms" 1416 option to "ssh-dss,ssh-rsa" in ~/.ssh/config or on the ssh 1417 command line. 1418 1419 Please note that the sequence of keys offered for 1420 authentication has been changed as well. You may want to 1421 specify IdentityFile in a different order to revert this 1422 behavior. 1423 142420080713: 1425 The sio(4) driver has been removed from the i386 and amd64 1426 kernel configuration files. This means uart(4) is now the 1427 default serial port driver on those platforms as well. 1428 1429 To prevent collisions with the sio(4) driver, the uart(4) driver 1430 uses different names for its device nodes. This means the 1431 onboard serial port will now most likely be called "ttyu0" 1432 instead of "ttyd0". You may need to reconfigure applications to 1433 use the new device names. 1434 1435 When using the serial port as a boot console, be sure to update 1436 /boot/device.hints and /etc/ttys before booting the new kernel. 1437 If you forget to do so, you can still manually specify the hints 1438 at the loader prompt: 1439 1440 set hint.uart.0.at="isa" 1441 set hint.uart.0.port="0x3F8" 1442 set hint.uart.0.flags="0x10" 1443 set hint.uart.0.irq="4" 1444 boot -s 1445 144620080609: 1447 The gpt(8) utility has been removed. Use gpart(8) to partition 1448 disks instead. 1449 145020080603: 1451 The version that Linuxulator emulates was changed from 2.4.2 1452 to 2.6.16. If you experience any problems with Linux binaries 1453 please try to set sysctl compat.linux.osrelease to 2.4.2 and 1454 if it fixes the problem contact emulation mailing list. 1455 145620080525: 1457 ISDN4BSD (I4B) was removed from the src tree. You may need to 1458 update a your kernel configuration and remove relevant entries. 1459 146020080509: 1461 I have checked in code to support multiple routing tables. 1462 See the man pages setfib(1) and setfib(2). 1463 This is a hopefully backwards compatible version, 1464 but to make use of it you need to compile your kernel 1465 with options ROUTETABLES=2 (or more up to 16). 1466 146720080420: 1468 The 802.11 wireless support was redone to enable multi-bss 1469 operation on devices that are capable. The underlying device 1470 is no longer used directly but instead wlanX devices are 1471 cloned with ifconfig. This requires changes to rc.conf files. 1472 For example, change: 1473 ifconfig_ath0="WPA DHCP" 1474 to 1475 wlans_ath0=wlan0 1476 ifconfig_wlan0="WPA DHCP" 1477 see rc.conf(5) for more details. In addition, mergemaster of 1478 /etc/rc.d is highly recommended. Simultaneous update of userland 1479 and kernel wouldn't hurt either. 1480 1481 As part of the multi-bss changes the wlan_scan_ap and wlan_scan_sta 1482 modules were merged into the base wlan module. All references 1483 to these modules (e.g. in kernel config files) must be removed. 1484 148520080408: 1486 psm(4) has gained write(2) support in native operation level. 1487 Arbitrary commands can be written to /dev/psm%d and status can 1488 be read back from it. Therefore, an application is responsible 1489 for status validation and error recovery. It is a no-op in 1490 other operation levels. 1491 149220080312: 1493 Support for KSE threading has been removed from the kernel. To 1494 run legacy applications linked against KSE libmap.conf may 1495 be used. The following libmap.conf may be used to ensure 1496 compatibility with any prior release: 1497 1498 libpthread.so.1 libthr.so.1 1499 libpthread.so.2 libthr.so.2 1500 libkse.so.3 libthr.so.3 1501 150220080301: 1503 The layout of struct vmspace has changed. This affects libkvm 1504 and any executables that link against libkvm and use the 1505 kvm_getprocs() function. In particular, but not exclusively, 1506 it affects ps(1), fstat(1), pkill(1), systat(1), top(1) and w(1). 1507 The effects are minimal, but it's advisable to upgrade world 1508 nonetheless. 1509 151020080229: 1511 The latest em driver no longer has support in it for the 1512 82575 adapter, this is now moved to the igb driver. The 1513 split was done to make new features that are incompatible 1514 with older hardware easier to do. 1515 151620080220: 1517 The new geom_lvm(4) geom class has been renamed to geom_linux_lvm(4), 1518 likewise the kernel option is now GEOM_LINUX_LVM. 1519 152020080211: 1521 The default NFS mount mode has changed from UDP to TCP for 1522 increased reliability. If you rely on (insecurely) NFS 1523 mounting across a firewall you may need to update your 1524 firewall rules. 1525 152620080208: 1527 Belatedly note the addition of m_collapse for compacting 1528 mbuf chains. 1529 153020080126: 1531 The fts(3) structures have been changed to use adequate 1532 integer types for their members and so to be able to cope 1533 with huge file trees. The old fts(3) ABI is preserved 1534 through symbol versioning in libc, so third-party binaries 1535 using fts(3) should still work, although they will not take 1536 advantage of the extended types. At the same time, some 1537 third-party software might fail to build after this change 1538 due to unportable assumptions made in its source code about 1539 fts(3) structure members. Such software should be fixed 1540 by its vendor or, in the worst case, in the ports tree. 1541 FreeBSD_version 800015 marks this change for the unlikely 1542 case that a portable fix is impossible. 1543 154420080123: 1545 To upgrade to -current after this date, you must be running 1546 FreeBSD not older than 6.0-RELEASE. Upgrading to -current 1547 from 5.x now requires a stop over at RELENG_6 or RELENG_7 systems. 1548 154920071128: 1550 The ADAPTIVE_GIANT kernel option has been retired because its 1551 functionality is the default now. 1552 155320071118: 1554 The AT keyboard emulation of sunkbd(4) has been turned on 1555 by default. In order to make the special symbols of the Sun 1556 keyboards driven by sunkbd(4) work under X these now have 1557 to be configured the same way as Sun USB keyboards driven 1558 by ukbd(4) (which also does AT keyboard emulation), f.e.: 1559 1560 Option "XkbLayout" "us" 1561 Option "XkbRules" "xorg" 1562 Option "XkbSymbols" "pc(pc105)+sun_vndr/usb(sun_usb)+us" 1563 156420071024: 1565 It has been decided that it is desirable to provide ABI 1566 backwards compatibility to the FreeBSD 4/5/6 versions of the 1567 PCIOCGETCONF, PCIOCREAD and PCIOCWRITE IOCTLs, which was 1568 broken with the introduction of PCI domain support (see the 1569 20070930 entry). Unfortunately, this required the ABI of 1570 PCIOCGETCONF to be broken again in order to be able to 1571 provide backwards compatibility to the old version of that 1572 IOCTL. Thus consumers of PCIOCGETCONF have to be recompiled 1573 again. As for prominent ports this affects neither pciutils 1574 nor xorg-server this time, the hal port needs to be rebuilt 1575 however. 1576 157720071020: 1578 The misnamed kthread_create() and friends have been renamed 1579 to kproc_create() etc. Many of the callers already 1580 used kproc_start().. 1581 I will return kthread_create() and friends in a while 1582 with implementations that actually create threads, not procs. 1583 Renaming corresponds with version 800002. 1584 158520071010: 1586 RELENG_7 branched. 1587 1588COMMON ITEMS: 1589 1590 General Notes 1591 ------------- 1592 Avoid using make -j when upgrading. While generally safe, there are 1593 sometimes problems using -j to upgrade. If your upgrade fails with 1594 -j, please try again without -j. From time to time in the past there 1595 have been problems using -j with buildworld and/or installworld. This 1596 is especially true when upgrading between "distant" versions (eg one 1597 that cross a major release boundary or several minor releases, or when 1598 several months have passed on the -current branch). 1599 1600 Sometimes, obscure build problems are the result of environment 1601 poisoning. This can happen because the make utility reads its 1602 environment when searching for values for global variables. To run 1603 your build attempts in an "environmental clean room", prefix all make 1604 commands with 'env -i '. See the env(1) manual page for more details. 1605 1606 When upgrading from one major version to another it is generally best 1607 to upgrade to the latest code in the currently installed branch first, 1608 then do an upgrade to the new branch. This is the best-tested upgrade 1609 path, and has the highest probability of being successful. Please try 1610 this approach before reporting problems with a major version upgrade. 1611 1612 ZFS notes 1613 --------- 1614 When upgrading the boot ZFS pool to a new version, always follow 1615 these two steps: 1616 1617 1.) recompile and reinstall the ZFS boot loader and boot block 1618 (this is part of "make buildworld" and "make installworld") 1619 1620 2.) update the ZFS boot block on your boot drive 1621 1622 The following example updates the ZFS boot block on the first 1623 partition (freebsd-boot) of a GPT partitioned drive ad0: 1624 "gpart bootcode -p /boot/gptzfsboot -i 1 ad0" 1625 1626 Non-boot pools do not need these updates. 1627 1628 To build a kernel 1629 ----------------- 1630 If you are updating from a prior version of FreeBSD (even one just 1631 a few days old), you should follow this procedure. It is the most 1632 failsafe as it uses a /usr/obj tree with a fresh mini-buildworld, 1633 1634 make kernel-toolchain 1635 make -DALWAYS_CHECK_MAKE buildkernel KERNCONF=YOUR_KERNEL_HERE 1636 make -DALWAYS_CHECK_MAKE installkernel KERNCONF=YOUR_KERNEL_HERE 1637 1638 To test a kernel once 1639 --------------------- 1640 If you just want to boot a kernel once (because you are not sure 1641 if it works, or if you want to boot a known bad kernel to provide 1642 debugging information) run 1643 make installkernel KERNCONF=YOUR_KERNEL_HERE KODIR=/boot/testkernel 1644 nextboot -k testkernel 1645 1646 To just build a kernel when you know that it won't mess you up 1647 -------------------------------------------------------------- 1648 This assumes you are already running a CURRENT system. Replace 1649 ${arch} with the architecture of your machine (e.g. "i386", 1650 "arm", "amd64", "ia64", "pc98", "sparc64", "powerpc", "mips", etc). 1651 1652 cd src/sys/${arch}/conf 1653 config KERNEL_NAME_HERE 1654 cd ../compile/KERNEL_NAME_HERE 1655 make depend 1656 make 1657 make install 1658 1659 If this fails, go to the "To build a kernel" section. 1660 1661 To rebuild everything and install it on the current system. 1662 ----------------------------------------------------------- 1663 # Note: sometimes if you are running current you gotta do more than 1664 # is listed here if you are upgrading from a really old current. 1665 1666 <make sure you have good level 0 dumps> 1667 make buildworld 1668 make kernel KERNCONF=YOUR_KERNEL_HERE 1669 [1] 1670 <reboot in single user> [3] 1671 mergemaster -p [5] 1672 make installworld 1673 mergemaster -i [4] 1674 make delete-old [6] 1675 <reboot> 1676 1677 1678 To cross-install current onto a separate partition 1679 -------------------------------------------------- 1680 # In this approach we use a separate partition to hold 1681 # current's root, 'usr', and 'var' directories. A partition 1682 # holding "/", "/usr" and "/var" should be about 2GB in 1683 # size. 1684 1685 <make sure you have good level 0 dumps> 1686 <boot into -stable> 1687 make buildworld 1688 make buildkernel KERNCONF=YOUR_KERNEL_HERE 1689 <maybe newfs current's root partition> 1690 <mount current's root partition on directory ${CURRENT_ROOT}> 1691 make installworld DESTDIR=${CURRENT_ROOT} 1692 make distribution DESTDIR=${CURRENT_ROOT} # if newfs'd 1693 make installkernel KERNCONF=YOUR_KERNEL_HERE DESTDIR=${CURRENT_ROOT} 1694 cp /etc/fstab ${CURRENT_ROOT}/etc/fstab # if newfs'd 1695 <edit ${CURRENT_ROOT}/etc/fstab to mount "/" from the correct partition> 1696 <reboot into current> 1697 <do a "native" rebuild/install as described in the previous section> 1698 <maybe install compatibility libraries from ports/misc/compat*> 1699 <reboot> 1700 1701 1702 To upgrade in-place from stable to current 1703 ---------------------------------------------- 1704 <make sure you have good level 0 dumps> 1705 make buildworld [9] 1706 make kernel KERNCONF=YOUR_KERNEL_HERE [8] 1707 [1] 1708 <reboot in single user> [3] 1709 mergemaster -p [5] 1710 make installworld 1711 mergemaster -i [4] 1712 make delete-old [6] 1713 <reboot> 1714 1715 Make sure that you've read the UPDATING file to understand the 1716 tweaks to various things you need. At this point in the life 1717 cycle of current, things change often and you are on your own 1718 to cope. The defaults can also change, so please read ALL of 1719 the UPDATING entries. 1720 1721 Also, if you are tracking -current, you must be subscribed to 1722 freebsd-current@freebsd.org. Make sure that before you update 1723 your sources that you have read and understood all the recent 1724 messages there. If in doubt, please track -stable which has 1725 much fewer pitfalls. 1726 1727 [1] If you have third party modules, such as vmware, you 1728 should disable them at this point so they don't crash your 1729 system on reboot. 1730 1731 [3] From the bootblocks, boot -s, and then do 1732 fsck -p 1733 mount -u / 1734 mount -a 1735 cd src 1736 adjkerntz -i # if CMOS is wall time 1737 Also, when doing a major release upgrade, it is required that 1738 you boot into single user mode to do the installworld. 1739 1740 [4] Note: This step is non-optional. Failure to do this step 1741 can result in a significant reduction in the functionality of the 1742 system. Attempting to do it by hand is not recommended and those 1743 that pursue this avenue should read this file carefully, as well 1744 as the archives of freebsd-current and freebsd-hackers mailing lists 1745 for potential gotchas. The -U option is also useful to consider. 1746 See mergemaster(8) for more information. 1747 1748 [5] Usually this step is a noop. However, from time to time 1749 you may need to do this if you get unknown user in the following 1750 step. It never hurts to do it all the time. You may need to 1751 install a new mergemaster (cd src/usr.sbin/mergemaster && make 1752 install) after the buildworld before this step if you last updated 1753 from current before 20020224 or from -stable before 20020408. 1754 1755 [6] This only deletes old files and directories. Old libraries 1756 can be deleted by "make delete-old-libs", but you have to make 1757 sure that no program is using those libraries anymore. 1758 1759 [8] In order to have a kernel that can run the 4.x binaries needed to 1760 do an installworld, you must include the COMPAT_FREEBSD4 option in 1761 your kernel. Failure to do so may leave you with a system that is 1762 hard to boot to recover. A similar kernel option COMPAT_FREEBSD5 is 1763 required to run the 5.x binaries on more recent kernels. And so on 1764 for COMPAT_FREEBSD6 and COMPAT_FREEBSD7. 1765 1766 Make sure that you merge any new devices from GENERIC since the 1767 last time you updated your kernel config file. 1768 1769 [9] When checking out sources, you must include the -P flag to have 1770 cvs prune empty directories. 1771 1772 If CPUTYPE is defined in your /etc/make.conf, make sure to use the 1773 "?=" instead of the "=" assignment operator, so that buildworld can 1774 override the CPUTYPE if it needs to. 1775 1776 MAKEOBJDIRPREFIX must be defined in an environment variable, and 1777 not on the command line, or in /etc/make.conf. buildworld will 1778 warn if it is improperly defined. 1779FORMAT: 1780 1781This file contains a list, in reverse chronological order, of major 1782breakages in tracking -current. It is not guaranteed to be a complete 1783list of such breakages, and only contains entries since October 10, 2007. 1784If you need to see UPDATING entries from before that date, you will need 1785to fetch an UPDATING file from an older FreeBSD release. 1786 1787Copyright information: 1788 1789Copyright 1998-2009 M. Warner Losh. All Rights Reserved. 1790 1791Redistribution, publication, translation and use, with or without 1792modification, in full or in part, in any form or format of this 1793document are permitted without further permission from the author. 1794 1795THIS DOCUMENT IS PROVIDED BY WARNER LOSH ``AS IS'' AND ANY EXPRESS OR 1796IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 1797WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 1798DISCLAIMED. IN NO EVENT SHALL WARNER LOSH BE LIABLE FOR ANY DIRECT, 1799INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 1800(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 1801SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 1802HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 1803STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 1804IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 1805POSSIBILITY OF SUCH DAMAGE. 1806 1807Contact Warner Losh if you have any questions about your use of 1808this document. 1809 1810$FreeBSD: head/UPDATING 249665 2013-04-20 01:12:23Z imp $ 1811