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741 Commits

Author SHA1 Message Date
Bananymous 7d2ab53baa Kernel: Ext2FS now does allocations better 
We only have to allocate at the beginning of the all functions and
can properly exit before any disk reads if we run out of memory.

This makes development little bit 'harder' since the {read,write}_block
user must allocate a buffer of atleast block_size bytes.

I also made disk access to cause kernel panic on error since the error
handling during file write is something I don't want to think now.
The filesystem can easily corrupt so, I feel like when disk io starts
to fail I'll come back to this.
 2023-03-23 23:22:31 +02:00
Bananymous 2152b8b95f Kernel: Add possibiliity to create empty files on Ext2 
Big rewrite for Ext2 for more easy and optimized code
 2023-03-23 22:26:06 +02:00
Bananymous 8ac1ae1574 LibC: add more typedefs to sys/types 2023-03-23 19:24:12 +02:00
Bananymous 4fd21bc303 Kernel: Remove block group descriptor cache from ext2fs 
This will make improving the fs easier since we need to only update
the values on the disk
 2023-03-23 18:52:58 +02:00
Bananymous 15037bfc7a Kernel: Move get_unix_time to RTC namespace 2023-03-23 18:14:51 +02:00
Bananymous 5831c72aad LibC: add errno NAMETOOLONG 2023-03-23 14:48:42 +02:00
Bananymous a063d041c9 BAN: char* is now formatted as string and not pointer 2023-03-23 14:29:35 +02:00
Bananymous 3572e9794a BAN: Modify Span constructors to keep constness correctly 2023-03-23 14:26:03 +02:00
Bananymous cef6999dc7 BAN: Add is_const to traits 2023-03-23 13:28:57 +02:00
Bananymous 6ed9651176 Kernel: StorageDevice and Ext2 "support" writing 2023-03-23 13:04:13 +02:00
Bananymous 3efbe22a1b Kernel: Shell now prints unix time with 'date' command 2023-03-23 11:13:51 +02:00
Bananymous 96579b88cf Kernel: Cleanup GPT parsing code 2023-03-23 11:13:14 +02:00
Bananymous 2ec18855f2 Kernel: TTY buffer is resized on font size change 
Shell also has better line wrapping. You still can't visually go
back to previous line, but atleas we now write from the beginning
of the line
 2023-03-22 02:09:22 +02:00
Bananymous b222581d18 Kernel: Reading from fd verifies that file is opened for reading 2023-03-22 01:55:58 +02:00
Bananymous a8e3ee6f19 Kernel: Ext2 directory functions now fail on invalid blocks 
Invalid blocks should only happen while writing to a file and
I think in that case we should just bail out instead of giving
you incomlete inode list or search result.
 2023-03-22 01:55:57 +02:00
Bananymous a083e588ba Kernel: cksum uses now a different crc32_table to match linux 'cksum' 2023-03-22 01:55:21 +02:00
Bananymous 9b500842a0 Kernel: Ext2 can now read from non-block-size aligned offsets 2023-03-21 19:19:17 +02:00
Bananymous b21348379f Kernel: Remove obsolete Ext2FS::ext2_root_inode() 
This was not used by anyone and the cast was wrong anyway
 2023-03-21 18:19:48 +02:00
Bananymous 633055293e Kernel: Remove for_each_block from Ext2 2023-03-21 18:14:02 +02:00
Bananymous ae9d618803 Kernel: Cleanup font parsing 
We use now the LittleEndian<> wrapper for PSF2 header and no more
magic constants in code
 2023-03-20 19:48:08 +02:00
Bananymous 9c744dfc44 BAN: Add wrappers for little/big endian numbers 2023-03-20 19:48:08 +02:00
Bananymous faf1b661bb Kernel: prefs font does not allocate extra buffer 2023-03-20 19:48:01 +02:00
Bananymous 22e45278a2 Kernel: Fix PC Screen font parsing 
I had misread the format and the parsing code was incorrect. I also
changed fonts to store unicode codepoints as 32 bit integers, so
every character can be represented
 2023-03-20 14:52:42 +02:00
Bananymous 43f4657566 Kernel: Font parsing uses Spans now 2023-03-20 13:35:54 +02:00
Bananymous 70f2908056 BAN: Implement basic Span 
This is wrapper over contiguous block of memory e.g. Vector
 2023-03-20 13:34:26 +02:00
Bananymous ef381d0600 BAN: Add iterators to all containers with contiguous memory 2023-03-20 13:26:42 +02:00
Bananymous cfa87526a7 BAN: Add implementation for basic iterator for contiguous memory 2023-03-20 13:15:38 +02:00
Bananymous 39b560fde3 Kernel: Add basic mounting to VFS. 2023-03-19 05:51:25 +02:00
Bananymous 0c582b4490 LibC: add errno ENOTEMPTY 2023-03-19 05:43:40 +02:00
Bananymous 61caf566fc LibC: add errno EEXISTS 2023-03-19 04:17:39 +02:00
Bananymous 76d5364a55 Kernel: Add comparison operator for inodes 2023-03-19 03:34:23 +02:00
Bananymous 5224df321e
Create README.md 2023-03-18 04:05:59 +02:00
Bananymous 7b9c3e9119 Qemu: add kvm acceleration as option 2023-03-18 03:51:10 +02:00
Bananymous b41491e205 Kernel: Add cksum to Shell for file read testing 
I also removed the 'using namespace BAN'
 2023-03-18 03:50:24 +02:00
Bananymous 8236598f9d Kernel: Optimize Ext2 disk reads 
We used to read whole file until we reached the asked offset.
Now we can calculate the appropriate block and read just the asked data.
 2023-03-18 03:47:59 +02:00
Bananymous 1a26a318a4 Kernel: Rework filesystem reading 
We now read from a filesystem to user provided buffer.

Read sizes are determined by read call.

You should now get file descriptors and do reading through Process::current()
 2023-03-17 21:18:41 +02:00
Bananymous ceb53533be LibC: add fcntl.h with some defines 2023-03-17 21:18:41 +02:00
Bananymous e2707b9416 LibC: Add EBADF errno 2023-03-16 16:22:11 +02:00
Bananymous 4493c9bbe6 LibC: Add ENTOSUP errno 2023-03-16 16:03:51 +02:00
Bananymous 1f2ceeb329 Kernel: VFS caches currently open inodes 2023-03-16 15:31:33 +02:00
Bananymous 1292be71b2 BAN: Add FNV hash for strings 2023-03-16 15:11:22 +02:00
Bananymous 1b7625581d Kernel: Add basic concept of Processes 
We now create Shell as a process that has its own threads
 2023-03-16 12:17:04 +02:00
Bananymous c012822d49 BAN: Rename StringView suffix from _sv to sv 2023-03-16 12:15:16 +02:00
Bananymous 8b8e3cbbf0 Kernel/Userspace: Start initial work on userspace and syscalls 2023-03-13 15:32:46 +02:00
Bananymous af854ec9e1 Kernel: Thread creation now takes void(*)() as entry and void* as data 
This simplifies threading for the future and gets rid of (undefined?)
cast of member function pointer to address
 2023-03-09 15:33:42 +02:00
Bananymous 8dbece9119 Kernel: kmalloc minimum align is forced to s_kmalloc_min_align 2023-03-09 14:37:25 +02:00
Bananymous 8940ff8002 Kernel: You don't have to check whether VFS is initialized or not 
VFS now returns Error when attempting to traverse inodes if it did
not find root partition
 2023-03-09 02:31:24 +02:00
Bananymous fc58baf54d Kernel: if VFS initialization does not find root, we fail 2023-03-09 02:17:42 +02:00
Bananymous 392da37f9a BAN: Function storage is now aligned as CallableBase and not max_align_t 
On 32 bit architecture the alignment of 16 bytes did not seem to work
on stack variables. UBSan detected whole lot of misaligned functions
from Ext2.cpp. This patch should make function alignment be big enough?
 2023-03-09 01:42:17 +02:00
Bananymous 2e6e0d0ef5 Kernel: FIX ubsan complaining about unaligned addresses for STDHeaders 2023-03-08 22:55:44 +02:00