Changes from 1.1.19 to 1.1.20

These changes are archived on ftp.crynwr.com:pub/kchanges and http://www.crynwr.com/kchanges. I cannot answer questions about Linux -- I merely summarize the kernel patches after reading them. I try to make them useful to everyone, but kernel hackers should take them with a grain of salt and read the patches themselves. The patch file is patch20.gz

• Load balancing support marked as "experimental" instead of "very experimental"
• Sony CDU31A CDROM driver now supports the CDU33A also.
• Default IRQ for 3c501 changed from 7 to 5.
• scsi_ioctl now only rounds the *buffer* size up.
• scsi fixes to scatter/gather on Ultrastor 24F.
• core dumping for various executables enabled (but only aout implemented).
• More support for multiple execution domains (ELF, a.out, iBCS2, etc.).
• Keep track of usage counts for execution domains.
• added a flag for vm_growsup or vm_growsdown.
• Multiple CD-ROM options added (so you can have different options per CD-ROM).
• CD-ROM options for uid and gid added.
• SIOCGSTAMP had the wrong value.
• Make sure sys_idle is only called when running as the kernel.
• Add another system call for the personality.
• If anybody but the kernel tries INT, HLT, CLI, or STI, give an SIGILL.
• Networking changes notes (probably from Alan Cox, bless his heart)
• Changes for the 015 snapshot
  • All read/write buffers are validated at the top level _only_
  • All address structures are moved to and from user mode at the top level. Thus you can now issue proto->bind(....) calls and related functions such as connect from another kernel task. All thats left to fix now is a kernel alloc_socket()/free_socket() and accompanying proto->make_kernel(socket)
  • Small fixes to address behaviour caused by the above
  • Max NFS size of 16K bytes
  • Added the apricot driver as a test (#'ed out in config.in)
  • Fixed a missing function definition in net_init.c
  • Added G4KLX ax25_router code
  • Added Niibe's PLIP driver and altered it to support timer configuration and IRQ/port setting. Added if_plip.h. Comments and feedback appreciated on this (both to Niibe and me).
  • Added AF_MAX/PF_MAX defines
  • Added a note that the DE600 driver also works for a noname 'PE1200'.
  • Network buffer statistics on shift-scroll_lock
  • Fixed a serious race in the device driver code. This was causing odd crashes with the Lance drivers, lockups with the ne2000 cards and a few other 'bad' goings on. All drivers are effected. See README.DEV if porting a driver to this revision. If you see entries in your 'free while locked' count, those would typically have crashed a pre 1.20 kernel.
  • TCP keeps the timers above 0.2sec round-trip time because of the use of delayed ACK's by BSD style kernels.
  • Fixed a small BSD error in the return from datagram socket recv/recvfrom() calls when data is truncated. BSD returns the true length of the message, Linux returned the amount copied which broke programs that did a MSG_PEEK with a small buffer and grew it if need be (some of the AV/RTP stuff notably).
  • Added TIOCINQ/OUTQ to AX.25 and IPX.
  • Added driver ioctl() calls to IPX.
  • Corrected the skb->len==0 in the tcp_data reset on shutdown to check skb->copied_seq.
  • IP options reflect onto SO_PRIORITY.
  • When a driver is downed its ARP entries are flushed. Should solve the occasional crash when taking out a modular driver.
  • Added Donald's multicast reception while promiscuous fix for the 8390 drivers.
  • Potential ARP TCP-retransmit clear race fixed. Incredibly unlikely to occur but no doubt it will 8(.

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