41 Commits

Author SHA1 Message Date
Sid Hussmann
6e8728f2d3 vfs/pipe: use local signal handling
This commit improves the performance of the pipe plugin by using local
signal handling and avoiding sending a signal during write when pipe
buffer is full.

Issue #3583
2021-02-23 12:07:17 +01:00
Sid Hussmann
8d13121e84 vfs/pipe: refactor read/write synchronization
All pipe-ends were notified at the same time which leads to dead-locks.
This commit mitigates this by having a signal handler for each pipe and
each pipe-end respectively.

Issue #3583
2021-02-23 12:07:17 +01:00
Sid Hussmann
3ff0efd627 vfs/pipe: add fifo feature to pipe plugin
The vfs pipe plugin can now be used as named pipe which anables data
transfer via file handles from one component to another. E.g. if one
would like to send data from component A to stdin of a libc component B,
one can do so by simply writing to that fifo file.

Issue #3583
2021-02-23 12:07:16 +01:00
Christian Helmuth
6cfaac182a Remove Cpu_session::Native_cpu definition from API
This type can be a forward declaration in the public API because its
definition is required only in kernel-specific code.

Related to #3979
2021-01-25 13:58:09 +01:00
Martin Stein
30b8f4efc8 gems: import Genode-specific code of the CBE
The CBE repository contained a lot of Genode-specific code despite the fact
that the CBE core logic is not bound to Genode in any way. Therefore the
Genode-specific CBE code is moved to the 'gems' repository to form part of
Genode mainline. The remaining CBE code becomes a port in Genode instead of
being invoked as sub-repository.

The commit combines the following work steps:

* add all files removed from CBE repository
* add CBE port files
* make all CBE libs and targets build again
* make all CBE run scripts succeed again
* make all CBE recipes build again
* make CBE autopilot succeed again
* let CBE autopilot use 'libsparcrypto' contrib dir and Genode build dir
  instead of '.ci' dir in CBE contrib dir (remove '.ci' dir from CBE repo)
* let CBE autopilot always check for all ports
* make CBE autopilot directly executable
* fix license headers in all Genode CBE files
* remove unused VFS replay component
* remove unused CBE test
* remove unused external crypto
* remove unused files in run dir
* remove unused external trust anchor
* add cbe_tester test to autopilot list
* get rid of directories 'include/cbe_*' and 'include/utils'

Fixes #3937
2020-11-27 09:19:08 +01:00
Alexander Boettcher
c0f8022a78 aes_cbc_4k: use libcrypto
Issue #3905
2020-10-09 13:35:56 +02:00
Norman Feske
4aca94b08b vfs/ttf: support for watching font-size changes
This patch allows the use of the VFS watch mechanism for the glyph file
of the TTF VFS plugin so that clients become able to dynamically respond
to font reconfigurations.

Issue #3875
2020-09-09 16:57:34 +02:00
Norman Feske
658091bfad ttf_font: add sanity check for invalid scale value
The check prevents the Ttf_font from violating the bounding box in the
presence of very small scale values. This can happen during the startup
of Sculpt. Before the framebuffer driver is up, Sculpt bases its dynamic
font-size setting on a screen resolution of 1x1.

Issue #3812
2020-08-25 11:50:10 +02:00
Martin Stein
f3eaeb08ef ada/spark: all warnings, warn strict, style checks
* enable all common warnings through default value of CC_ADA_WARN
* treat warnings like errors through default value of CC_ADA_WARN_STRICT
* enable almost all style checks through default value of CC_ADA_WARN_STRICT
* style fixes for aes_cbc_4k
* disable strict warnings and style checks for libsparkcrypto and spark lib

Ref #3848
2020-08-25 11:50:09 +02:00
Christian Helmuth
18b26ff595 vfs/pipe: never report read_ready on pipe/out handle 2020-07-30 08:49:23 +02:00
Norman Feske
be65c4acd2 Avoid use of deprecated Xml_node methods
Issue #3755
2020-05-18 10:16:14 +02:00
Pirmin Duss
9da428dccf vfs_import: implement write loop for copy_file
This is required to allow import of large file.

Fixes #3655
2020-04-17 12:37:26 +02:00
Norman Feske
4fe4c9aa63 vfs/pipe: trigger I/O-progress handler on EOF
When the last writer closes the pipe, we must trigger the I/O progress
handler to deliver the final EOF to the client (READ_OK with out count
of 0).

Fixes #3697
2020-03-26 11:38:56 +01:00
Norman Feske
0c8ec41c21 vfs/pipe: let num_dirent return 0
This prevents the original value ~0UL from messing up the output
of 'ls -l /dev'.

Issue #3578
2019-12-19 17:01:42 +01:00
Norman Feske
6b6915e304 ttf_font: fix artifacts with large font sizes
This patch is a follow-up fix for "ttf_font: prevent out-of-bounds
access", which produced sporadic single-pixel artifacts with large font
sizes, e.g., with the monospaced font set to 24px in Sculpt.

The artifacts occurred only for some horizontal sub-pixel positions, in
combination with the font cache, and after the rendering of '>'
characters. They were ultimately caused by the missed clearning of the
first pixel of a glyph where x0 is 1 (e.g., the character 'd'). In this
case, a pixel from the previously evicted cache entry (the '>') shined
through. The patch fixes the problem by clearing the glyph starting from
the first, not the x0's, pixel.

Fixes #3567
2019-12-19 16:59:03 +01:00
Emery Hemingway
c51b4b5742 New VFS plugin for emulating POSIX pipes
Add a new plugin for creating pipes between pairs of VFS handles. It is
intended to replace the libc_pipe plugin, one of the last remaining libc
plugins.

In contrast to the libc_pipe plugin, this plugin defers cross-handle
notification until I/O signal handling rather than block and unblock
readers using a semaphore. This is a performance regression in the case
of multiple threads blocking on a pipe, but shall be an intermediate
mechanism pending renovations within the libc VFS and threading layers.
As a side effect, threads blocked on a pipe might not be resumed until
the main thread suspends and dispatches I/O signals.

The "test-libc_pipe" test has been adjusted to use the VFS pipe plugin
and tests both local pipes and pipes hosted remotely in the VFS server.

Merge adaptations (such as EOF handling, adjustment to VFS/libc
interface changes) by Norman Feske.

Fix #2303
2019-11-19 14:54:13 +01:00
Norman Feske
c85bc38802 Move include/gems/vfs.h to include/os/vfs.h
Fixes #3515
2019-11-19 14:23:56 +01:00
Norman Feske
5ab1505d43 file system: enhanced file status info
This patch extends the 'File_system::Status',
'File_system::Directory_entry', and the related 'Vfs' types with
the following additional information:

- Distinction between continuous and transactional files (Node_type)
  (issue #3507)
- Readable, writeable, and executable attributes (Node_rwx),
  replacing the former 'mode' bits
  (issue #3030)

The types 'Node_rwx', 'Node_type' are defined twice,
once for the VFS (vfs/types.h) and once for the 'File_system'
session (file_system_session/file_system_session.h).
Similarly, there is a direct correspondance between
'Vfs::Directory_service::Dirent' and 'File_system::Directory_entry'.

This duplication of types follows the existing pattern of keeping the
VFS and file-system session independent from each other.
2019-11-19 14:23:56 +01:00
Sebastian Sumpf
18b3253cac vfs_trace: VFS plugin that offers trace buffer access
The plugin creates a file-system hierarchy that enabled the access of
trace buffers for each component and its threads.

issue #3294
2019-07-09 08:55:23 +02:00
Norman Feske
7e174e73be ttf_font: prevent out-of-bounds access
Thanks Alexander Böttcher for investigating.

Fixes #3393
2019-06-13 12:17:31 +02:00
Norman Feske
a2743dcaeb Library for the AES-CBC en/decryption of 4K blocks
The 'aes_cbc_4k' library is simple wrapper around libsparkcrypto to
serve as a backend for storage encryption. It operates on data chunks of
4 KiB and uses AES-CBC while incorporating the block number and the
private key as salt values.
2019-04-09 12:30:35 +02:00
Emery Hemingway
a635873568 VFS: Replace global response handlers with local handlers
Replace the I/O response handler that is passed to the VFS at
construction with an object that is dynamically attached to handles.
This object shall also accept read-ready notifications, and plugins are
encouraged to keep handles awaiting ready-ready notifications separate
from handles that await I/O progress.

Replace the use of handle lists in plugins with handle queues, this
makes the code easier to understand and the ordering of notifications to
the application more explicit.

These changes replace the use of the Post_signal_hook from all VFS
plugins, applications must assume that read-ready and I/O notifications
occur during I/O signal dispatch and use an Io_progress_handler at its
entrypoints to defer response until after signal dispatching.

Fix #3257
2019-04-09 12:30:34 +02:00
Emery Hemingway
800b4e44b1 Reduce Vfs::Vfs_handle::Context to empty struct type
The "Vfs::Vfs_handle" type should not contain any public members that
can be initialized by the VFS internally and by the application, so
remove inheritance from the "Genode::list::Element" class. The VFS
plugins must instead use lists of "Vfs::Vfs_handle" sub-classes, the
lifetime of which are always managed by the plugin.

Ref #3036
2019-04-01 19:33:47 +02:00
Emery Hemingway
db23b276f2 Remove COW VFS plugin
The COW plugin provided only partial copy-on-write semantics and had
problems detecting recursive requests. Conversely, the import plugin has
much simpler behavior that is easy to test because it mirrors that of
the ram_fs server.

Ref #2745
2018-08-28 16:45:24 +02:00
Emery Hemingway
59ac5b10c7 Plugin for importing VFS content
This new vfs_import plugin allows a VFS instance to be populated during
construction using a sub-VFS configured in an '<import>' configuration
node. This allows the ram_fs File_system server to be replaced by the
VFS server by reimplementing the ram_fs 'content' feature.  At the
moment the copying of symlinks is not enabled, and the resources
obtained by the import file-system may not be freed after the import is
finished.

Fix #2906
2018-08-02 14:36:42 +02:00
Norman Feske
8bcf540915 os: add Text_painter::Font::height method
Issue #2716
2018-04-19 13:38:33 +02:00
Norman Feske
e896d13eec vfs_ttf: respond to dynamic config changes
Issue #2740
2018-04-19 13:38:33 +02:00
Emery Hemingway
c1ff581fb4 Copy-on-write VFS plugin
VFS plugin to replicate from one file-system to another. Can be used to
seed a mutable file-system with an immutable file-system. The plugin is
configure with two paths, a read-only path, and a read-write path. This
is an initial implementation that copies files on open. It is not
optimized to perform actual copy-on-write, but the result is the same.

<vfs>
	<dir name="immutable"> ... </dir>
	<dir name="mutable">   ... </dir>
	<dir name="cow">
		<cow ro="/immutable" rw="/mutable"/>
	</dir>
</vfs>

Fix #2745
2018-04-19 12:38:51 +02:00
Emery Hemingway
82a683eccc VFS: construct file-systems using Vfs::Env object
Reduce the size and forward compatibility of VFS file-system
constructors by passing an object holding accessors for 'Genode::Env',
'Genode::Allocator', response handlers, and the root file-system.

Fix #2742
2018-04-19 12:38:27 +02:00
Emery Hemingway
f7ba777fff VFS audit plugin
Plugin for auditing VFS access using the VFS server. Useful for tracking
which files ported software expects to be present.

Fix #2160
2018-04-10 11:11:50 +02:00
Norman Feske
81e55e8901 gems: TrueType VFS plugin
This commit introduces a VFS plugin that exposes the glyphs and
metadata of a TrueType font as a pseudo file system. The TTF font data
is obtained from the VFS. The resulting pseudo file system is a
directory that contains the files 'glyphs', 'baseline', 'max_width',
and 'max_height'.

The counter part of the plugin is the 'Vfs_font' class that implements
the 'Text_painter::Font' interface by accessing the pseudo file system
as provided by the TTF VFS plugin.

Fixes #2740
2018-04-10 11:09:20 +02:00
Norman Feske
23f07331c8 gems: ttf_font library 2018-04-10 11:09:19 +02:00
Christian Helmuth
4a444651c5 gems: loop on partial reads in file util 2018-02-09 13:34:18 +01:00
Norman Feske
366bba0227 Exclude higher-level repos from strict warnings
This is a follow-up commit to "Increase default warning level", which
overrides Genode's new default warning level for targets contained in
higher-level repositories. By explicitly whitelisting all those targets,
we can selectively adjust them to the new strictness over time - by
looking out for 'CC_CXX_WARN_STRICT' in the target description files.

Issue #465
2018-01-17 12:14:36 +01:00
Christian Prochaska
b0935ef9b2 VFS: nonblocking interface
The VFS library can be used in single-threaded or multi-threaded
environments and depending on that, signals are handled by the same thread
which uses the VFS library or possibly by a different thread. If a VFS
plugin needs to block to wait for a signal, there is currently no way
which works reliably in both environments.

For this reason, this commit makes the interface of the VFS library
nonblocking, similar to the File_system session interface.

The most important changes are:

- Directories are created and opened with the 'opendir()' function and the
  directory entries are read with the recently introduced 'queue_read()'
  and 'complete_read()' functions.

- Symbolic links are created and opened with the 'openlink()' function and
  the link target is read with the 'queue_read()' and 'complete_read()'
  functions and written with the 'write()' function.

- The 'write()' function does not wait for signals anymore. This can have
  the effect that data written by a VFS library user has not been
  processed by a file system server yet when the library user asks for the
  size of the file or closes it (both done with RPC functions at the file
  system server). For this reason, a user of the VFS library should
  request synchronization before calling 'stat()' or 'close()'. To make
  sure that a file system server has processed all write request packets
  which a client submitted before the synchronization request,
  synchronization is now requested at the file system server with a
  synchronization packet instead of an RPC function. Because of this
  change, the synchronization interface of the VFS library is now split
  into 'queue_sync()' and 'complete_sync()' functions.

Fixes #2399
2017-08-28 16:49:38 +02:00
Stefan Kalkowski
10e2e223cd foc: remove obsolete features (ref #2405)
Removes the following Fiasco.OC specific features:
* GDB extensions for Fiasco.OC
* i.MX53 support for Fiasco.OC
* Kernel debugger terminal driver
* Obsolete interface Native_pd
* Obsolete function of interface Native_cpu
2017-05-31 13:16:08 +02:00
Christian Prochaska
ca2871e2e4 nova: use 'Native_cpu' component for thread initialization
Pass the thread type and exception base to core with a 'Native_cpu'
component instead of enhancing the 'Thread_state' class.

Fixes #2298
2017-03-15 12:24:42 +01:00
Christian Prochaska
a77e509283 cpu_sampler: kernel-agnostic build support
Fixes #2293
2017-02-28 13:00:42 +01:00
Norman Feske
29b8d609c9 Adjust file headers to refer to the AGPLv3 2017-02-28 12:59:29 +01:00
Norman Feske
17c79a9e23 base: avoid use of deprecated base/printf.h
Besides adapting the components to the use of base/log.h, the patch
cleans up a few base headers, i.e., it removes unused includes from
root/component.h, specifically base/heap.h and
ram_session/ram_session.h. Hence, components that relied on the implicit
inclusion of those headers have to manually include those headers now.

While adjusting the log messages, I repeatedly stumbled over the problem
that printing char * arguments is ambiguous. It is unclear whether to
print the argument as pointer or null-terminated string. To overcome
this problem, the patch introduces a new type 'Cstring' that allows the
caller to express that the argument should be handled as null-terminated
string. As a nice side effect, with this type in place, the optional len
argument of the 'String' class could be removed. Instead of supplying a
pair of (char const *, size_t), the constructor accepts a 'Cstring'.
This, in turn, clears the way let the 'String' constructor use the new
output mechanism to assemble a string from multiple arguments (and
thereby getting rid of snprintf within Genode in the near future).

To enforce the explicit resolution of the char * ambiguity, the 'char *'
overload of the 'print' function is marked as deleted.

Issue #1987
2016-08-29 17:27:10 +02:00
Norman Feske
0b3efa90c9 gems: move reusable code to include/gems
This patch makes various utilities that were originally developed for
the backdrop application publicly available.
2014-10-13 15:21:53 +02:00