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Jonas 'Sortie' Termansen b9898086c6 Add file descriptor table reservations. 
The file descriptor table now allows reserving room for multiple file
descriptors without assigning their numbers. This functionality means
any error conditions happen up front and the subsequent number
assignment will never fail.

This change uses the new functionality to fix troublesome error handling
when allocating multiple file descriptors. One pty allocation error path
was even wrong.

There were subtle race conditions where one (kernel) thread may have
allocated one file descriptor, and another thread spuciously replaces it
with something else, and then the second file descriptor allocation
failed in the first thread, and it closes the first file descriptor now
pointing to a different file description. This case seems harmless but
it's not a great class of bugs to exist in the first place. The new
behavior means the file descriptions appear in the file descriptor table
without fail and never needs to be cleaned up midway and is certainly
immune to shenangians from other threads.

Reviewed-by: Pedro Falcato <pedro.falcato@gmail.com>
 		2021-12-31 22:24:07 +01:00
..
disk Add ATAPI support to ata(4). 2021-06-27 13:54:56 +02:00
fs Allow poll on all kinds of files. 2021-02-17 23:11:31 +01:00
gpu/bga Add cache-aware memory mapping functions. 2017-02-19 12:13:32 +01:00
include/sortix Add file descriptor table reservations. 2021-12-31 22:24:07 +01:00
kb Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
mouse Fix improper uses of ScopedLockSignal. 2021-02-11 20:47:47 +01:00
net Implement getpeername(2) and getsockname(2). 2017-02-26 22:24:35 +01:00
x64 Implement threading primitives that truly sleep. 2021-06-23 22:10:47 +02:00
x86 Implement threading primitives that truly sleep. 2021-06-23 22:10:47 +02:00
x86-family Prioritize the interrupt worker thread. 2017-05-18 22:40:46 +02:00
.gitignore Allow bootloader bitmap framebuffer modesetting. 2016-01-08 19:56:11 +01:00
Makefile Implement threading primitives that truly sleep. 2021-06-23 22:10:47 +02:00
addralloc.cpp Fix kernel/addralloc.cpp file header comment. 2017-08-20 12:44:59 +02:00
alarm.cpp Fix handling of overflow and non-canonical values in timespec APIs. 2021-06-22 21:48:27 +02:00
clock.cpp Implement threading primitives that truly sleep. 2021-06-23 22:10:47 +02:00
com.cpp Fix concurrent serial port read and write. 2016-11-03 22:10:45 +01:00
com.h Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
copy.cpp Implement threading primitives that truly sleep. 2021-06-23 22:10:47 +02:00
descriptor.cpp Fix handling of overflow and non-canonical values in timespec APIs. 2021-06-22 21:48:27 +02:00
dnsconfig.cpp Add getdnsconfig(2) and setdnsconfig(2). 2021-06-13 23:27:52 +02:00
dtable.cpp Add file descriptor table reservations. 2021-12-31 22:24:07 +01:00
elf.cpp Optimize is_power_of_two. 2016-11-06 17:42:13 +01:00
end.cpp Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
fcache.cpp Fix SEEK_END, file offset overflow, and read/write/mkpartition syscall bugs. 2017-12-04 23:56:46 +01:00
fsfunc.cpp Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
hostname.cpp Fix kernel not using BRAND_DEFAULT_HOSTNAME. 2016-09-28 20:15:36 +02:00
identity.cpp Fix setuid(2) and setgid(2) not setting the effective user and group. 2021-07-27 00:46:42 +02:00
initrd.cpp Add --append-to kernel(7) multiboot module option. 2018-12-08 22:54:28 +01:00
initrd.h Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
inode.cpp Fix reading directories not failing with EISDIR. 2021-07-28 22:21:41 +02:00
interlock.cpp Implement threading primitives that truly sleep. 2021-06-23 22:10:47 +02:00
interrupt.cpp Implement threading primitives that truly sleep. 2021-06-23 22:10:47 +02:00
io.cpp Add file descriptor table reservations. 2021-12-31 22:24:07 +01:00
ioctx.cpp Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
kernel.cpp Implement threading primitives that truly sleep. 2021-06-23 22:10:47 +02:00
kernelinfo.cpp Add tagline. 2016-03-26 23:50:50 +01:00
kthread.cpp Implement threading primitives that truly sleep. 2021-06-23 22:10:47 +02:00
lfbtextbuffer.cpp Implement threading primitives that truly sleep. 2021-06-23 22:10:47 +02:00
lfbtextbuffer.h Fix LFBTextBuffer GetChar starting worker thread when paused. 2018-08-06 23:59:35 +02:00
libk.cpp Abort on overlapping memcpy. 2021-05-30 23:48:19 +02:00
linebuffer.cpp Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
linebuffer.h Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
log.cpp Add cache-aware memory mapping functions. 2017-02-19 12:13:32 +01:00
logterminal.cpp Implement Alt + key mapping to Esc followed by key in kernel tty 2021-05-05 00:19:56 +02:00
logterminal.h Add support for sessions. 2016-11-23 22:30:47 +01:00
memorymanagement.cpp Fix SEEK_END, file offset overflow, and read/write/mkpartition syscall bugs. 2017-12-04 23:56:46 +01:00
mtable.cpp Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
multiboot.h Upgrade to latest upstream multiboot header. 2014-12-01 22:51:07 +01:00
op-new.cpp Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
palette.h Support 8-bit/24-bit color and more escape codes in the graphical console. 2016-11-27 11:19:03 +01:00
panic.cpp Fix technical typo. 2017-04-08 22:20:03 +02:00
partition.cpp Fix st_blksize and st_blocks kernel values. 2018-03-31 00:55:33 +02:00
partition.h Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
pci-mmio.cpp Add cache-aware memory mapping functions. 2017-02-19 12:13:32 +01:00
pci.cpp Add PCI scanning functions and busmastering functions. 2017-02-19 12:10:59 +01:00
pipe.cpp Add file descriptor table reservations. 2021-12-31 22:24:07 +01:00
poll.cpp Fix kernel deadlock in ppoll(2). 2021-07-14 15:41:28 +02:00
process.cpp Send SIGCHLD to init even for reparented processes. 2021-12-12 22:13:05 +01:00
psctl.cpp Fix psctl(2) not setting uid, euid, gid, and egid. 2021-02-11 20:47:49 +01:00
ptable.cpp Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
pty.cpp Add file descriptor table reservations. 2021-12-31 22:24:07 +01:00
pty.h Add pseudo terminals. 2016-11-23 22:31:05 +01:00
random.cpp Seed kernel entropy with randomness from the previous boot. 2016-10-04 00:34:50 +02:00
refcount.cpp Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
registers.cpp Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
resource.cpp Add support for sessions. 2016-11-23 22:30:47 +01:00
scheduler.cpp Implement threading primitives that truly sleep. 2021-06-23 22:10:47 +02:00
segment.cpp Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
signal.cpp Implement threading primitives that truly sleep. 2021-06-23 22:10:47 +02:00
sockopt.cpp Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
string.cpp Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
syscall.cpp Implement threading primitives that truly sleep. 2021-06-23 22:10:47 +02:00
textbuffer.cpp Fix operator spacing in kernel/textbuffer.cpp. 2017-04-18 23:32:00 +02:00
textterminal.cpp Fix saving and restoring console cursor position. 2017-01-22 22:28:58 +01:00
textterminal.h Support 8-bit/24-bit color and more escape codes in the graphical console. 2016-11-27 11:19:03 +01:00
thread.cpp Implement threading primitives that truly sleep. 2021-06-23 22:10:47 +02:00
time.cpp Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
timer.cpp Fix handling of overflow and non-canonical values in timespec APIs. 2021-06-22 21:48:27 +02:00
tty.cpp Fix improper uses of ScopedLockSignal. 2021-02-11 20:47:47 +01:00
tty.h Add support for sessions. 2016-11-23 22:30:47 +01:00
uart.cpp Add debug uart utility functions. 2016-11-27 11:18:48 +01:00
uart.h Add debug uart utility functions. 2016-11-27 11:18:48 +01:00
user-timer.cpp Fix handling of overflow and non-canonical values in timespec APIs. 2021-06-22 21:48:27 +02:00
vga.cpp Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
vga.h Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
vgafont.f16 Allow bootloader bitmap framebuffer modesetting. 2016-01-08 19:56:11 +01:00
vgatextbuffer.cpp Support 8-bit/24-bit color and more escape codes in the graphical console. 2016-11-27 11:19:03 +01:00
vgatextbuffer.h Refactor graphical resolution changes. 2016-11-27 11:18:48 +01:00
video.cpp Refactor graphical resolution changes. 2016-11-27 11:18:48 +01:00
vnode.cpp Implement getpeername(2) and getsockname(2). 2017-02-26 22:24:35 +01:00
worker.cpp Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00