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82 commits

Author SHA1 Message Date
Andreas Kling
77b9fa89dd AK: Rename Retainable => RefCounted. 
(And various related renames that go along with it.)
 2019-06-21 15:30:03 +02:00
Robin Burchell
0a3abcc0a8 Kernel: Expose kernel command line to userspace through /proc/cmdline 2019-06-16 14:33:59 +02:00
Andreas Kling
9e0f7acfe5 Kernel+Userland: Expose list of network adapters through /proc/netadapters. 
Added a simple /bin/ifconfig program that just pretty-prints that file. :^)
 2019-06-16 07:06:49 +02:00
Andreas Kling
c1bbd40b9e Kernel: Rename "descriptor" to "description" where appropriate. 
Now that FileDescription is called that, variables of that type should not
be called "descriptor". This is kinda wordy but we'll get used to it.
 2019-06-13 22:03:04 +02:00
Sergey Bugaev
75df45d709 Kernel: Fix comparing StringViews with strcmp(). 
StringView character buffer is not guaranteed to be null-terminated;
in particular it will not be null-terminated when making a substring.
This means that the buffer can not be used with C functions that expect
a null-terminated string. Instead, StringView provides a convinient
operator == for comparing it with Strings and C stirngs, so use that.

This fixes /proc/self/... resolution failures in ProcFS, since the name
("self") passed to ProcFSInode::lookup() would not be null-terminated.
 2019-06-12 16:14:29 +02:00
Conrad Pankoff
aee9317d86 Kernel: Refactor MemoryManager to use a Bitmap rather than a Vector 
This significantly reduces the pressure on the kernel heap when
allocating a lot of pages.

Previously at about 250MB allocated, the free page list would outgrow
the kernel's heap. Given that there is no longer a page list, this does
not happen.

The next barrier will be the kernel memory used by the page records for
in-use memory. This kicks in at about 1GB.
 2019-06-12 15:38:17 +02:00
Andreas Kling
8258b699db Kernel: Use StringView more in Inode and subclasses. 2019-06-09 10:25:19 +02:00
Andreas Kling
736092a087 Kernel: Move i386.{cpp,h} => Arch/i386/CPU.{cpp,h} 
There's a ton of work that would need to be done before we could spin up on
another architecture, but let's at least try to separate things out a bit.
 2019-06-07 20:02:01 +02:00
Andreas Kling
39d1a9ae66 Meta: Tweak .clang-format to not wrap braces after enums. 2019-06-07 17:13:23 +02:00
Andreas Kling
e42c3b4fd7 Kernel: Rename LinearAddress => VirtualAddress. 2019-06-07 12:56:50 +02:00
Andreas Kling
bc951ca565 Kernel: Run clang-format on everything. 2019-06-07 11:43:58 +02:00
Andreas Kling
08cd75ac4b Kernel: Rename FileDescriptor to FileDescription. 
After reading a bunch of POSIX specs, I've learned that a file descriptor
is the number that refers to a file description, not the description itself.
So this patch renames FileDescriptor to FileDescription, and Process now has
FileDescription* file_description(int fd).
 2019-06-07 09:36:51 +02:00
Andreas Kling
bba2c062fe FileSystem: Make Inode::lookup() take a StringView. 
This avoids a lot of String allocation during path resolution.
 2019-06-01 18:01:28 +02:00
Andreas Kling
2e14e5891c FileSystem: Remove now-unused Inode::parent() and Inode::reverse_lookup(). 
These were only used to implement the old path resolution algorithm.
 2019-06-01 17:46:37 +02:00
Andreas Kling
9ac95d1867 FileSystem: Pass mode_t to Inode::add_child(). 
This way the Ext2FS code can update its directory entry "file type" fields
correctly based on the file mode. This fixes some e2fsck whining.
 2019-05-31 17:41:33 +02:00
Andreas Kling
874bffc729 FileSystem: Get rid of VFS::absolute_path() and teach Mount about custodies. 2019-05-30 22:30:29 +02:00
Andreas Kling
55821c91f8 Kernel: Rename Process::cwd_custody() to Process::current_directory(). 
...and executable_custody() to just executable().
 2019-05-30 22:30:25 +02:00
Andreas Kling
393851418b FileSystem: Port most of the code over to using custodies. 
The current working directory is now stored as a custody. Likewise for a
process executable file. This unbreaks /proc/PID/fd which has not been
working since we made the filesystem bigger.

This still needs a bunch of work, for instance when renaming or removing
a file somewhere, we have to update the relevant custody links.
 2019-05-30 18:58:59 +02:00
Andreas Kling
01ffcdfa31 Kernel: Encapsulate the Region's COW map a bit better. 2019-05-14 17:31:57 +02:00
Andreas Kling
8b249bd09b Kernel+Userland: Implement mknod() syscall and add a /bin/mknod program. 2019-05-03 22:59:58 +02:00
Andreas Kling
b8e60b6652 Kernel: Remove unused Region::is_bitmap(). 2019-05-02 23:31:11 +02:00
Andreas Kling
28244039a5 Kernel: Don't symbolicate symbol+offset for obvious non-kernel addresses. 2019-04-30 14:47:22 +02:00
Andreas Kling
0a0d739e98 Kernel: Make FIFO inherit from File. 2019-04-29 04:55:54 +02:00
Andreas Kling
58240fdb33 Do a pass of compiler warning fixes. 
This is really making me question not using 64-bit integers more.
 2019-04-23 13:00:53 +02:00
Andreas Kling
c02c6fef28 Kernel+ProcessManager: Show per-process syscall counts. 
Added a simple syscall counter to the /proc/all contents. :^)
 2019-04-17 23:16:14 +02:00
Andreas Kling
2533e0b57b Kernel: Reduce kmallocing in /proc/all and /proc/memstat. 2019-04-16 00:36:17 +02:00
Andreas Kling
d384c7815f Kernel: Make it possible to have kmalloc() dump call stacks. 
This can be enabled at any time using a sysctl:

    sysctl kmalloc_stacks=1

The stacks will go to the debugger output only.
 2019-04-15 23:58:48 +02:00
Andreas Kling
e9c0f4567d Kernel+ProcessManager: Expose the number of kmalloc/kfree calls. 
This will be very helpful in tracking down unwanted kmalloc traffic. :^)
 2019-04-15 19:43:12 +02:00
Andreas Kling
c0fe48635b Kernel: Add /proc/uptime file (number of seconds since boot.) 
Also added a simple /bin/uptime to pretty-print this information. :^)
 2019-04-14 15:19:45 +02:00
Andreas Kling
29d0412a06 Kernel: Remove system.h and make the uptime global a qword. 2019-04-14 01:29:14 +02:00
Andreas Kling
b9738fa8ac Kernel: Move VM-related files into Kernel/VM/. 
Also break MemoryManager.{cpp,h} into one file per class.
 2019-04-03 15:13:07 +02:00
Andreas Kling
f9864940eb Kernel: Move FS-related files into Kernel/FileSystem/ 2019-04-03 12:25:24 +02:00
Renamed from Kernel/ProcFS.cpp (Browse further)