Commit Graph

23 Commits

Author SHA1 Message Date
Undefine
2952401c58 Kernel/FATFS: Implement create_child
This is a large commit because it implements a lot of stuff to make
add_child simpler to get working. This allows us to create new files
on a FAT partition.
2024-04-21 15:34:33 +02:00
Undefine
098518cc57 Kernel/FATFS: Implement file modification
This is the first part of write support, it allows for full file
modification, but no creating or removing files yet.

Co-Authored-By: implicitfield <114500360+implicitfield@users.noreply.github.com>
2024-04-21 15:34:33 +02:00
Undefine
fde7bd9190 Kernel/FATFS: Make the debug logs nicer
They now look the same way as the ones in Ext2FS inodes which are
quite nice for debugging.
2024-04-21 15:34:33 +02:00
Undefine
33f00a7efb Kernel/FATFS: Cache the cluster list and don't cache the InodeMetadata
Caching the cluster list allows us to fill the two fields in the
InodeMetadata. While at it, don't cache the metadata as when we
have write support having to keep both InodeMetadata and FATEntry
correct is going to get very annoying.
2024-04-21 15:34:33 +02:00
Undefine
d4badfac72 Kernel/FATFS: Store cluster list instead of block list
Once we have write support, managing clusters is going to be
way easier than managing blocks.
2024-04-21 15:34:33 +02:00
Undefine
7e251c3b4f Kernel/FATFS: Return ENOTSUP on chown and chmod 2024-04-21 15:34:33 +02:00
Undefine
eb2721d650 Kernel/FATFS: Pass the FATEntry location to FATInode constructor
This is going to be necessary to flush the metadata later on.
2024-04-21 15:34:33 +02:00
Undefine
de574b9ed9 Kernel/FATFS: Improve error propagation in FATInode 2024-04-21 15:34:33 +02:00
Undefine
1350c555f6 Kernel/FATFS: Factor out the FAT reading to a function
Move the FAT reading code to a fat_read function in FATFS and move the
required functions to FATFS too.
2024-04-21 15:34:33 +02:00
implicitfield
b9d7e2db93 Kernel/FATFS: Prefer read_block() over raw_read()
`raw_read()` has proven to be a source of subtle bugs that occur as a
result of the cache and disk contents being out of sync.
2024-04-21 15:34:33 +02:00
Taj Morton
d6a519e9af Kernel/FileSystem/FATFS: Restrict reads to the size of the file
Resolves issue where empty portions of a sector (or empty sectors in
a cluster) would be included with the returned data in a read().
2024-01-12 15:54:46 -07:00
Taj Morton
2995ee5858 Kernel/FileSystem/FATFS: Support FAT12 file system clusters 2024-01-12 15:54:46 -07:00
Taj Morton
1f70a728f0 Kernel/FileSystem/FATFS: Support FAT16 file system clusters 2024-01-12 15:54:46 -07:00
Taj Morton
67f567348f Kernel/FileSystem/FATFS: Support for FAT12/16 DOS BIOS Parameter Blocks 2024-01-12 15:54:46 -07:00
kleines Filmröllchen
d1e6e6110d Kernel/FileSystem: Rename logical_block_size -> device_block_size
This never was a logical block size, it always was a device specific
block size. Ideally the block size would change in accordance to
whatever the driver wants to use, but that is a change for the future.
For now, let's get rid of this confusing naming.
2023-07-28 14:51:07 +02:00
Liav A
7c0540a229 Everywhere: Move global Kernel pattern code to Kernel/Library directory
This has KString, KBuffer, DoubleBuffer, KBufferBuilder, IOWindow,
UserOrKernelBuffer and ScopedCritical classes being moved to the
Kernel/Library subdirectory.

Also, move the panic and assertions handling code to that directory.
2023-06-04 21:32:34 +02:00
Andreas Kling
e6fc7b3ff7 Kernel: Switch LockRefPtr<Inode> to RefPtr<Inode>
The main place where this is a little iffy is in RAMFS where inodes
have a LockWeakPtr to their parent inode. I've left that as a
LockWeakPtr for now.
2023-03-09 21:54:59 +01:00
Liav A
9790b81959 Kernel/FileSystem: Add check of read offset for the FATInode code
Apparently we lacked this important check from the beginning of this
piece of code. This check is crucial to ensure we only give back data
being related to the FATInode data buffer and nothing beyond it.
2023-02-19 01:01:45 +01:00
Ollrogge
361df6eff8 AK: Add conversion functions for packed DOS time format
This also adjusts the FATFS code to use the new functions and removes
the now redundant old conversion functions.
2023-02-12 13:13:15 -07:00
Taj Morton
31eeea08ba Kernel/FileSystem: Fix handling of FAT names that don't fill an entry
* Fix bug where last character of a filename or extension would be
   truncated (HELLO.TXT -> HELL.TX).
 * Fix bug where additional NULL characters would be added to long
   filenames that did not completely fill one of the Long Filename Entry
   character fields.
2023-01-04 09:02:13 +00:00
sin-ack
3b03077abb Kernel: Update the ".." inode for directories after a rename
Because the ".." entry in a directory is a separate inode, if a
directory is renamed to a new location, then we should update this entry
the point to the new parent directory as well.

Co-authored-by: Liav A <liavalb@gmail.com>
2022-11-25 17:33:05 +01:00
Andreas Kling
10fa72d451 Kernel: Use AK::Time for InodeMetadata timestamps instead of time_t
Before this change, we were truncating the nanosecond part of file
timestamps in many different places.
2022-11-24 16:56:27 +01:00
Liav A
e882b2ed05 Kernel: Split the FATFileSystem.{cpp,h} files into smaller components 2022-11-08 02:54:48 -07:00