link()

zero out all of dirent.name when creating
don't increase length of directory

LRU disk cache replacement

free inode only when noone is holding a pointer to it. should fix open-unlink-
read problem, but untested

mknod set nlink = 1
usertests for concurrent create/delete, and read() after unlink()

fstat
primitive ls

unlink,mknod,create with multi-component pathnames should work now
remove console init code from userfs

fix deadlock---iput(dp) asap
working unlink, but doesn't free dir blocks that become empty
remove out-of-date comment in ioapic

init creates console, opens 0/1/2, runs sh
sh accepts 0-argument commands (like userfs)
reads from console

interrupts could be recursive since lapic_eoi() called before rti
so fast interrupts overflow the kernel stack
fix: cli() before lapic_eoi()

low-level keyboard input (not hooked up to /dev yet)
fix acquire() to cli() *before* incrementing nlock
make T_SYSCALL a trap gate, not an interrupt gate
sadly, various crashes if you hold down a key

low-level keyboard input (not hooked up to /dev yet)
fix acquire() to cli() *before* incrementing nlock
make T_SYSCALL a trap gate, not an interrupt gate
sadly, various crashes if you hold down a keyboard key...

show more ...

printf
convert userfs to use printf
bfree
ifree
writei
start on unlink

iread for T_DEV
O_RDWR, etc.
create file

devsw
checkpoint: write(fd,"hello\n",6) where fd is a console dev almost works

oops, update directory inode too

block bitmap
balloc

mknod,ialloc,iupdate

open()

primitive exec

namei

bread
iget
mkfs makes a file system image
put this in your .bochsrc:
ata0-slave: type=disk, mode=flat, path="fs.img", cylinders=1024, heads=1, spt=1