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serenity/Kernel/FileSystem
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Liav A 0fd7b688af Kernel: Introduce support for using FileSystem object in multiple mounts 
The idea is to enable mounting FileSystem objects across multiple mounts
in contrast to what happened until now - each mount has its own unique
FileSystem object being attached to it.

Considering a situation of mounting a block device at 2 different mount
points at in system, there were a couple of critical flaws due to how
the previous "design" worked:
1. BlockBasedFileSystem(s) that pointed to the same actual device had a
separate DiskCache object being attached to them. Because both instances
were not synchronized by any means, corruption of the filesystem is most
likely achieveable by a simple cache flush of either of the instances.
2. For superblock-oriented filesystems (such as the ext2 filesystem),
lack of synchronization between both instances can lead to severe
corruption in the superblock, which could render the entire filesystem
unusable.
3. Flags of a specific filesystem implementation (for example, with xfs
on Linux, one can instruct to mount it with the discard option) must be
honored across multiple mounts, to ensure expected behavior against a
particular filesystem.

This patch put the foundations to start fix the issues mentioned above.
However, there are still major issues to solve, so this is only a start.
2022-10-22 16:57:52 -04:00
..
SysFS Kernel: Abstracts x86 reboot and shutdown specific methods 2022-09-20 18:43:05 +01:00
AnonymousFile.cpp Kernel: Simplify the File memory-mapping API 2022-08-24 14:57:51 +02:00
AnonymousFile.h Kernel: Simplify the File memory-mapping API 2022-08-24 14:57:51 +02:00
BlockBasedFileSystem.cpp Kernel: Introduce support for using FileSystem object in multiple mounts 2022-10-22 16:57:52 -04:00
BlockBasedFileSystem.h Kernel: Introduce support for using FileSystem object in multiple mounts 2022-10-22 16:57:52 -04:00
Custody.cpp Kernel: Use RefPtr instead of LockRefPtr for Custody 2022-08-21 12:25:14 +02:00
Custody.h Kernel: Use RefPtr instead of LockRefPtr for Custody 2022-08-21 12:25:14 +02:00
DeviceFileTypes.h Everywhere: Prefix 'TYPEDEF_DISTINCT_ORDERED_ID' with 'AK_' 2022-07-22 23:09:43 +01:00
DevPtsFS.cpp Kernel/FileSystem: Make Inode::{write,read}_bytes methods non-virtual 2022-09-16 14:55:45 +03:00
DevPtsFS.h Kernel/FileSystem: Make Inode::{write,read}_bytes methods non-virtual 2022-09-16 14:55:45 +03:00
ext2_fs.h Everywhere: Fix spelling mistakes 2022-01-07 15:44:42 +01:00
ext2_types.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
Ext2FileSystem.cpp Kernel: Introduce support for using FileSystem object in multiple mounts 2022-10-22 16:57:52 -04:00
Ext2FileSystem.h Kernel: Introduce support for using FileSystem object in multiple mounts 2022-10-22 16:57:52 -04:00
FATFileSystem.cpp Kernel: Introduce support for using FileSystem object in multiple mounts 2022-10-22 16:57:52 -04:00
FATFileSystem.h Kernel: Introduce support for using FileSystem object in multiple mounts 2022-10-22 16:57:52 -04:00
FIFO.cpp Kernel: Make self-contained locking smart pointers their own classes 2022-08-20 17:20:43 +02:00
FIFO.h Kernel: Make self-contained locking smart pointers their own classes 2022-08-20 17:20:43 +02:00
File.cpp Kernel: Simplify the File memory-mapping API 2022-08-24 14:57:51 +02:00
File.h Kernel: Simplify the File memory-mapping API 2022-08-24 14:57:51 +02:00
FileBackedFileSystem.cpp Kernel: Introduce support for using FileSystem object in multiple mounts 2022-10-22 16:57:52 -04:00
FileBackedFileSystem.h Kernel: Introduce support for using FileSystem object in multiple mounts 2022-10-22 16:57:52 -04:00
FileSystem.cpp Kernel: Introduce support for using FileSystem object in multiple mounts 2022-10-22 16:57:52 -04:00
FileSystem.h Kernel: Introduce support for using FileSystem object in multiple mounts 2022-10-22 16:57:52 -04:00
Inode.cpp Kernel/FileSystem: Make Inode::{write,read}_bytes methods non-virtual 2022-09-16 14:55:45 +03:00
Inode.h Kernel/FileSystem: Remove the locking of a Inode mutex in InodeVMObjects 2022-09-26 22:06:10 +03:00
InodeFile.cpp Kernel: Handle mmap requests on zero-length data file inodes safely 2022-09-16 14:55:45 +03:00
InodeFile.h Kernel: Simplify the File memory-mapping API 2022-08-24 14:57:51 +02:00
InodeIdentifier.h Everywhere: Prefix 'TYPEDEF_DISTINCT_ORDERED_ID' with 'AK_' 2022-07-22 23:09:43 +01:00
InodeMetadata.cpp Kernel: Make VirtualFileSystem functions take credentials as input 2022-08-21 16:02:24 +02:00
InodeMetadata.h Kernel: Make VirtualFileSystem functions take credentials as input 2022-08-21 16:02:24 +02:00
InodeWatcher.cpp Kernel: Make self-contained locking smart pointers their own classes 2022-08-20 17:20:43 +02:00
InodeWatcher.h Kernel: Make self-contained locking smart pointers their own classes 2022-08-20 17:20:43 +02:00
ISO9660FileSystem.cpp Kernel: Introduce support for using FileSystem object in multiple mounts 2022-10-22 16:57:52 -04:00
ISO9660FileSystem.h Kernel: Introduce support for using FileSystem object in multiple mounts 2022-10-22 16:57:52 -04:00
Mount.cpp Kernel: Use RefPtr instead of LockRefPtr for Custody 2022-08-21 12:25:14 +02:00
Mount.h Kernel: Use RefPtr instead of LockRefPtr for Custody 2022-08-21 12:25:14 +02:00
OpenFileDescription.cpp Kernel/FileSystem: Add a few missing includes 2022-10-22 16:57:52 -04:00
OpenFileDescription.h Kernel/FileSystem: Add a few missing includes 2022-10-22 16:57:52 -04:00
Plan9FileSystem.cpp Kernel: Introduce support for using FileSystem object in multiple mounts 2022-10-22 16:57:52 -04:00
Plan9FileSystem.h Kernel: Introduce support for using FileSystem object in multiple mounts 2022-10-22 16:57:52 -04:00
ProcFS.cpp Kernel/FileSystem: Make Inode::{write,read}_bytes methods non-virtual 2022-09-16 14:55:45 +03:00
ProcFS.h Kernel/FileSystem: Make Inode::{write,read}_bytes methods non-virtual 2022-09-16 14:55:45 +03:00
SysFS.cpp Kernel/FileSystem: Make Inode::{write,read}_bytes methods non-virtual 2022-09-16 14:55:45 +03:00
SysFS.h Kernel/FileSystem: Make Inode::{write,read}_bytes methods non-virtual 2022-09-16 14:55:45 +03:00
TmpFS.cpp Kernel: Add support for device nodes in TmpFS 2022-10-22 19:18:15 +02:00
TmpFS.h Kernel: Use more fine-grained content data block granularity in TmpFS 2022-10-16 17:46:40 +02:00
UnveilNode.h AK+Kernel: Specialize Trie for NNOP<KString> and use it in UnveilNode 2022-02-16 22:21:37 +01:00
VirtualFileSystem.cpp Kernel: Introduce support for using FileSystem object in multiple mounts 2022-10-22 16:57:52 -04:00
VirtualFileSystem.h Kernel: Introduce support for using FileSystem object in multiple mounts 2022-10-22 16:57:52 -04:00