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104 commits

Author SHA1 Message Date
Hendiadyoin1
c3e57bfccb Kernel: Try to set [cm]time in Inode::did_modify_contents 
This indirectly resolves a fixme in sys$msync
 2022-07-15 12:42:43 +02:00
Tim Schumacher
cd189999d1 Kernel: Don't let locks of the same owner conflict with each other 
Documentation on POSIX locks seems sparse, but this is how the Linux
kernel implementation handles it.
 2022-07-08 22:27:38 +00:00
Tim Schumacher
dc6016cd18 Kernel: Don't fail on unlocking nonexistent file locks 
I haven't found any POSIX specification on this, but the Linux kernel
appears to handle it like that.

This is required by QEMU, as it just bulk-unlocks all its file locking
bytes without checking first if they are held.
 2022-07-08 22:27:38 +00:00
Idan Horowitz
086969277e Everywhere: Run clang-format 2022-04-01 21:24:45 +01:00
Idan Horowitz
e37e4a7980 Kernel: Make Inode::set_shared_vmobject() OOM-fallible 
Allocating a WeakPtr can fail, so this let's us properly propagate said
failure.
 2022-02-14 11:35:20 +01:00
Andreas Kling
cda56f8049 Kernel: Robustify and rename Inode bound socket API 
Rename the bound socket accessor from socket() to bound_socket().
Also return RefPtr<LocalSocket> instead of a raw pointer, to make it
harder for callers to mess up.
 2022-02-07 13:02:34 +01:00
Andreas Kling
e7dc9f71b8 Kernel: Protect Inode flock list with spinlock instead of mutex 2022-02-03 17:28:45 +01:00
Andreas Kling
e0d9472ced Kernel: Protect Inode's list of watchers with spinlock instead of mutex 2022-02-03 16:11:26 +01:00
Idan Horowitz
a9cd8ca841 Kernel: Make Inode::register_watcher() OOM-fallible 2022-01-26 02:37:03 +02:00
Idan Horowitz
e236f9d85a Kernel: Convert Inode event APIs to use StringViews instead of Strings 
These APIs allocate a copy internally anyways, so there's no point to
making another one for them.
 2022-01-12 16:09:09 +02:00
Andreas Kling
c427f8bbeb Kernel: Always pass InodeIdentifier by value 
These objects are small, there are no benefits to passing by reference.
 2022-01-02 18:08:02 +01:00
Daniel Bertalan
8e2efe78f7 Kernel: Tighten String-related includes 2021-12-30 14:16:03 +01:00
Andreas Kling
abf2204402 Kernel: Use copy_typed_from_user() in more places :^) 2021-12-18 11:30:10 +01:00
Hendiadyoin1
4cec16a713 Kernel: Add implied auto-specifiers in FileSystem 
As per clang-tidy.
 2021-12-15 23:34:11 -08:00
Andreas Kling
b285323d91 Kernel: Propagate Vector append failures from Inode::apply_flock() 2021-11-18 21:11:30 +01:00
Andreas Kling
79fa9765ca Kernel: Replace KResult and KResultOr<T> with Error and ErrorOr<T> 
We now use AK::Error and AK::ErrorOr<T> in both kernel and userspace!
This was a slightly tedious refactoring that took a long time, so it's
not unlikely that some bugs crept in.

Nevertheless, it does pass basic functionality testing, and it's just
real nice to finally see the same pattern in all contexts. :^)
 2021-11-08 01:10:53 +01:00
Andreas Kling
6f69d5204f Kernel: Make Inode::flush_metadata() return a KResult 
Even if this goes nowhere yet, we have to start building an error
propagation path somewhere.
 2021-10-21 23:23:23 +02:00
Brian Gianforcaro
85d36e56d2 Kernel: Pack Flock struct tighter 
Flagged by pvs-studio, ordering the members from largest to smallest
allows us to save a few bytes in the size of the struct.
 2021-09-16 17:17:13 +02:00
TheFightingCatfish
a81b21c1a7 Kernel+LibC: Implement fsync 2021-09-12 11:24:02 +02:00
Andreas Kling
524ef5e475 Kernel: Add KBuffer::bytes() and use it 
(Instead of hand-wrapping { data(), size() } in a bunch of places.)
 2021-09-08 20:16:00 +02:00
Andreas Kling
300402cc14 Kernel: Make it possible for KBufferBuilder creation to fail 
This patch adds KBufferBuilder::try_create() and treats it like anything
else that can fail. And so, failure to allocate the initial internal
buffer of the builder will now propagate an ENOMEM to the caller. :^)
 2021-09-07 15:54:23 +02:00
Andreas Kling
ed5d04b0ea Kernel: Use KResultOr and TRY() for FIFO 2021-09-07 13:58:16 +02:00
Andreas Kling
4a9c18afb9 Kernel: Rename FileDescription => OpenFileDescription 
Dr. POSIX really calls these "open file description", not just
"file description", so let's call them exactly that. :^)
 2021-09-07 13:53:14 +02:00
Andreas Kling
2065ced8f6 Kernel: Make KBufferBuilder::append() & friends return KResult 
This allows callers to react to a failed append (due to OOM.)
 2021-09-06 18:56:51 +02:00
Andreas Kling
48a0b31c47 Kernel: Make copy_{from,to}_user() return KResult and use TRY() 
This makes EFAULT propagation flow much more naturally. :^)
 2021-09-05 17:38:37 +02:00
Andreas Kling
b2950c67ea Kernel: Use TRY() in Inode 2021-09-05 16:25:40 +02:00
Andreas Kling
55adace359 Kernel: Rename SpinLock => Spinlock 2021-08-22 03:34:10 +02:00
Andreas Kling
ed6f84c2c9 Kernel: Rename SpinLockProtectedValue<T> => SpinLockProtected<T> 2021-08-22 03:34:09 +02:00
Andreas Kling
ea09294351 Kernel: Port Inode to ListedRefCounted 
This consolidates the lock+list combo into a SpinLockProtectedValue
and closes yet another unref() race. :^)
 2021-08-17 01:21:47 +02:00
Andreas Kling
c94c15d45c Everywhere: Replace AK::Singleton => Singleton 2021-08-08 00:03:45 +02:00
Andreas Kling
93d98d4976 Kernel: Move Kernel/Memory/ code into Kernel::Memory namespace 2021-08-06 14:05:58 +02:00
Andreas Kling
a1d7ebf85a Kernel: Rename Kernel/VM/ to Kernel/Memory/ 
This directory isn't just about virtual memory, it's about all kinds
of memory management.
 2021-08-06 14:05:58 +02:00
Brian Gianforcaro
8d3b819daf Kernel: Handle OOM from DoubleBuffer creation in FIFO creation 2021-08-03 18:54:23 +02:00
Andreas Kling
f9b7ea6de9 Revert "Kernel: Use IntrusiveList for keeping track of InodeWatchers" 
This reverts commit 43d6a7e74e.

This breaks multi-inode watchers.
 2021-07-21 21:24:26 +02:00
Andreas Kling
43d6a7e74e Kernel: Use IntrusiveList for keeping track of InodeWatchers 2021-07-21 20:17:55 +02:00
Peter Elliott
3fa2816642 Kernel+LibC: Implement fcntl(2) advisory locks 
Advisory locks don't actually prevent other processes from writing to
the file, but they do prevent other processes looking to acquire and
advisory lock on the file.

This implementation currently only adds non-blocking locks, which are
all I need for now.
 2021-07-20 17:44:30 +04:30
Andreas Kling
9457d83986 Kernel: Rename Locker => MutexLocker 2021-07-18 01:53:04 +02:00
Andreas Kling
3b805a57e6 Kernel: Rename Inode::m_lock => m_inode_lock 
This makes file system code much easier to read since it was hard when
both the file system and inode locks were called "m_lock".
 2021-07-17 21:17:39 +02:00
Andreas Kling
63e1423830 Kernel: Remove unused Inode::is_shared_vmobject() 2021-07-17 21:11:12 +02:00
Andreas Kling
0d39bd04d3 Kernel: Rename VFS => VirtualFileSystem 2021-07-11 00:25:24 +02:00
Andreas Kling
d53d9d3677 Kernel: Rename FS => FileSystem 
This matches our common naming style better.
 2021-07-11 00:20:38 +02:00
Gunnar Beutner
58c182b19e Kernel: Update check in Inode::read_entire 
The nread variable can't be less than zero anymore.
 2021-06-17 19:52:54 +02:00
Gunnar Beutner
bc3076f894 Kernel: Remove various other uses of ssize_t 2021-06-16 21:29:36 +02:00
Brian Gianforcaro
493d4d1cd7 Kernel: Switch Inode to IntrusiveList from InlineLinkedList 2021-05-26 20:24:32 +02:00
sin-ack
fe5ca6ca27 Kernel: Implement multi-watch InodeWatcher :^) 
This patch modifies InodeWatcher to switch to a one watcher, multiple
watches architecture.  The following changes have been made:

- The watch_file syscall is removed, and in its place the
  create_iwatcher, iwatcher_add_watch and iwatcher_remove_watch calls
  have been added.
- InodeWatcher now holds multiple WatchDescriptions for each file that
  is being watched.
- The InodeWatcher file descriptor can be read from to receive events on
  all watched files.

Co-authored-by: Gunnar Beutner <gunnar@beutner.name>
 2021-05-12 22:38:20 +02:00
Brian Gianforcaro
234c6ae32d Kernel: Change Inode::{read/write}_bytes interface to KResultOr<ssize_t> 
The error handling in all these cases was still using the old style
negative values to indicate errors. We have a nicer solution for this
now with KResultOr<T>. This change switches the interface and then all
implementers to use the new style.
 2021-05-02 13:27:37 +02:00
Andreas Kling
cd9be1733c Kernel: Make Inode::set_{a,c,m}time return KResult 
This exposed some missing error propagation, which this patch also
takes care of.
 2021-04-30 15:51:06 +02:00
Brian Gianforcaro
8d6e9fad40 Kernel: Remove the now defunct LOCKER(..) macro. 2021-04-25 09:38:27 +02:00
Brian Gianforcaro
1682f0b760 Everything: Move to SPDX license identifiers in all files. 
SPDX License Identifiers are a more compact / standardized
way of representing file license information.

See: https://spdx.dev/resources/use/#identifiers

This was done with the `ambr` search and replace tool.

 ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
 2021-04-22 11:22:27 +02:00
Andreas Kling
10f10abaa3 Kernel: Convert klog() => dmesgln() in filesystem code 2021-03-09 22:10:41 +01:00