Commit graph

36 commits

Author SHA1 Message Date
Andreas Kling
2c5a378ccc Kernel+Userland: Add symlink() syscall and add "-s" flag to /bin/ln.
It's now possible to create symbolic links! :^)

This exposed an issue in Ext2FS where we'd write uninitialized data past
the end of an inode's content. Fix this by zeroing out the tail end of
the last block in a file.
2019-03-02 01:52:24 +01:00
Andreas Kling
6b581aff77 Kernel: Make a copy of the dirty inode list before iterating in sync(). 2019-02-28 21:51:59 +01:00
Andreas Kling
d7d6deaa5c Ext2FS: Fix hole in Ext2FSInode::directory_entry_count() locking. 2019-02-27 17:07:34 +01:00
Andreas Kling
60d0a48be5 Kernel: Use KResult in link(). 2019-02-27 15:31:26 +01:00
Andreas Kling
5b27f11b97 Kernel: Use KResult in unlink() and rmdir(). 2019-02-27 14:11:25 +01:00
Andreas Kling
1d2529b4a1 Add chown() syscall and a simple /bin/chown program. 2019-02-27 12:32:53 +01:00
Andreas Kling
9624b54703 More moving towards using signed types.
I'm still feeling this out, but I am starting to like the general idea.
2019-02-25 22:06:55 +01:00
Andreas Kling
5af4e622b9 Kernel: Add KResult and KResultOr<T> classes.
The idea here is to combine a potential syscall error code with an arbitrary
type in the case of success. I feel like this will end up much less error
prone than returning some arbitrary type that kinda sorta has bool semantics
(but sometimes not really) and passing the error through an out-param.

This patch only converts a few syscalls to using it. More to come.
2019-02-25 20:50:22 +01:00
Andreas Kling
15fb917f28 Convert more RetainPtr use to Retained. 2019-02-25 16:04:08 +01:00
Andreas Kling
2cfcbdc735 AK: Add Retained<T>, like RetainPtr, but never null.
Also use some Clang attribute wizardry to get a warning for use-after-move.
2019-02-25 12:43:52 +01:00
Andreas Kling
d218686c0a Ext2FS: Don't copy more than sizeof(ext2_inode) bytes of raw inode data.
Some file systems have inodes larger than sizeof(ext2_inode) so this would
stomp all over unrelated data.
2019-02-24 14:24:04 +01:00
Andreas Kling
1da261eeb6 Ext2FS: Tweak a debug message to print file mode in octal. 2019-02-22 09:13:05 +01:00
Andreas Kling
f5f136931a Kernel: Start adding various file system permission checks.
Fail with EACCES in various situations. Fix userland bugs that were exposed.
2019-02-21 15:45:31 +01:00
Andreas Kling
43075e5878 Add a simple /bin/df which gathers its info from /proc/df. 2019-02-21 14:48:00 +01:00
Andreas Kling
7d288aafb2 Kernel: Add link() syscall to create hard links.
This accidentally grew into a little bit of VFS cleanup as well.

Also add a simple /bin/ln implementation to exercise it.
2019-02-21 13:26:40 +01:00
Andreas Kling
e0b81ee4c9 Ext2FS: Remove the inode cache lock in favor of one big lock instead. 2019-02-20 21:58:55 +01:00
Andreas Kling
3df4a902df Ext2FS: Lock a lot. Go way overkill with locking for now. 2019-02-20 13:09:59 +01:00
Andreas Kling
799177feda Kernel: Make BochsVGADevice a BlockDevice and support mmapping it.
Currently you can only mmap the entire framebuffer.
Using this when starting up the WindowServer gets us yet another step
closer towards it moving into userspace. :^)
2019-02-16 09:57:42 +01:00
Andreas Kling
749db8237c Ext2FS: Fix various bugs in inode and block allocation.
I had the wrong idea about how group indices work, so using a larger fs
with more than one group caused all kinds of mess.
2019-02-15 23:28:20 +01:00
Andreas Kling
f8951afe17 Ext2FS: Fix broken logic for accessing inode and block bitmaps.
This logic only worked for the very first block group.
2019-02-11 12:46:56 +01:00
Andreas Kling
298a49c688 IDEDiskDevice: Detect disk errors and report failure to clients.
Previously we'd just fail silently if there was an I/O error of any kind.
2019-02-11 11:38:14 +01:00
Andreas Kling
6274208eb9 Ext2FS: Fix bitmap overrun when reaching outside the first block group. 2019-02-08 17:14:51 +01:00
Andreas Kling
2736957701 Ext2FS: Fix dumb bitmap size bug in *_inode_allocation_state(). 2019-02-08 08:43:08 +01:00
Andreas Kling
ca16d9d98e Kernel: Invalidate file-backed VMO's when inodes are written.
The current strategy is simply to nuke all physical pages and force
reload them from disk. This is obviously not optimal and should eventually
be optimized. It should be fairly straightforward.
2019-02-05 08:17:46 +01:00
Andreas Kling
3a9c01619f Ext2FS: Avoid a kmallocation every time we fetch an inode from disk. 2019-02-03 04:05:30 +01:00
Andreas Kling
ffab6897aa Big, possibly complete sweep of naming changes. 2019-01-31 17:31:23 +01:00
Andreas Kling
fc0b63ca3c Kernel: Include absolute paths of mount points in /proc/mounts 2019-01-31 06:13:55 +01:00
Andreas Kling
c4fce9b3f9 Make stat() work on device files again.
FileDescriptor will now keep a pointer to the original inode even after
opening it resolves to a character device.

Fixed up /bin/ls to display major and minor device numbers instead of size
for device files.
2019-01-31 05:05:57 +01:00
Andreas Kling
c3cc318028 Ext2FS: Remove an unnecessary heap allocation in create_inode(). 2019-01-31 04:17:16 +01:00
Andreas Kling
3a4207b863 Fix dumb bug in HashTable::clear().
We forgot to clear the m_buckets pointer. This meant that multiple calls to
clear() would cause trouble.
2019-01-30 19:32:54 +01:00
Andreas Kling
c30e2c8d44 Implement basic chmod() syscall and /bin/chmod helper.
Only raw octal modes are supported right now.
This patch also changes mode_t from 32-bit to 16-bit to match the on-disk
type used by Ext2FS.

I also ran into EPERM being errno=0 which was confusing, so I inserted an
ESUCCESS in its place.
2019-01-29 04:55:08 +01:00
Andreas Kling
c95228b128 Add support for removing directories.
It's really only supported in Ext2FS since SynthFS doesn't really want you
mucking around with its files. This is pretty neat though :^)

I ran into some trouble with HashMap while working on this but opted to work
around it and leave that for a separate investigation.
2019-01-28 04:16:01 +01:00
Andreas Kling
1ee8597ce4 Ext2FS: Include meta blocks in an inode's i_blocks count. 2019-01-23 15:43:29 +01:00
Andreas Kling
8bb18fdc56 Kernel: Get rid of Unix namespace.
This is no longer needed as the Kernel can stand on its own legs now
and there won't be any conflict with host system data types.
2019-01-23 06:57:00 +01:00
Andreas Kling
730c14e647 VFS: Rename FS::id() to fsid() for consistency. 2019-01-23 05:39:11 +01:00
Andreas Kling
754037874c Move VFS sources into Kernel/. 2019-01-23 05:14:00 +01:00
Renamed from VirtualFileSystem/Ext2FileSystem.cpp (Browse further)