Bahadir Balban
1a90b655c7
Added child utcb initialisation to fork call implementation in libposix.
2008-08-22 00:26:19 +03:00
Bahadir Balban
1d15821acb
Added ipc to notify vfs about a forked child.
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TODO: Need to ensure child shmat()s its own utcb
after a fork (possibly in libposix/fork.c)
2008-08-22 00:11:06 +03:00
Bahadir Balban
3ce220f062
Changes to make sure after a fork a child process can safely return.
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This copies the parent kernel stack to child only for the part where
the previous context is saved. Then the child registers are modified
so that it would begin execution from returning of the system call.
2008-08-21 16:21:08 +03:00
Bahadir Balban
dada3e0b2c
Added copy_vma() function.
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Sorting out return_from_fork() and kernel stack setup for the child.
2008-08-21 12:18:38 +03:00
Bahadir Balban
69db3a04c0
Towards implementing fork.
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Issue is that shadow object references from original objects are into
the links rather than the objects.
2008-08-19 18:03:23 +03:00
Bahadir Balban
f436b44e81
Changes in the README, changes to fork template.
2008-08-16 13:01:18 +03:00
Bahadir Balban
d434ad4b40
Changes towards adding clone/fork
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new file: src/clone.c
2008-08-05 16:56:55 +03:00
Bahadir Balban
d1170211e3
Commented out printfs for pager/vfs interaction
2008-05-30 11:18:16 +03:00
Bahadir Balban
f561d885d5
Flushing pages to vfs will work, but the issue is that while vfs is
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serving mm0, if it page faults, system deadlocks because mm0 is waiting to be served by vfs.
FIX: To fix this, mm0 will need to fork itself and keep a separate thread solely for
page fault handling.
2008-05-28 23:37:41 +03:00
Bahadir Balban
98888a94b5
Modified scripts
2008-05-27 10:17:46 +03:00
Bahadir Balban
fd787479c3
Fixed minor faults during close path.
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FIXME:
write/close/open/read sequence does not read the initially written data.
Investigate.
2008-05-23 05:42:26 +00:00
Bahadir Balban
6be310f460
Added sys_close and sys_fsync
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Untested.
2008-05-23 03:59:18 +00:00
Bahadir Balban
00b47117b0
Added sys_stat, sys_fstat and their libposix glue.
2008-05-22 11:21:27 +00:00
Bahadir Balban
bd8b182f1b
Added syscall to update filestats (size) from pager.
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After flushing written/truncated pages, stats are updated
so that vfs is synced with new file info such as its size.
2008-05-21 10:23:11 +00:00
Bahadir Balban
5efece98cd
More changes
2008-05-03 15:04:16 +01:00
Bahadir Balban
0557fa8910
Gotta find a way to pass on updated file size before write_file_pages.
2008-04-26 01:03:11 +01:00
Bahadir Balban
f183b3c15e
Still towards close/flush.
2008-04-25 23:06:23 +01:00
Bahadir Balban
c9b9f9d111
Towards sys_close()/sys_flush()
2008-04-25 22:14:59 +01:00
Bahadir Balban
488d9e6271
Fixed the issue that page copy offsets were not correct.
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When copying file pages back and forth, we need both dst and src
offsets since the cursor offset and read/write buffer page offsets
are different. This is now fixed.
Also done some mods to close().
2008-04-25 17:07:49 +01:00
Bahadir Balban
ba725168a0
Fixed lseek. Updates to sys_read/sys_write
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read and write are both called by test0. But they don't yet
work as expected. An error is in one or both. To be investigated.
2008-04-24 00:09:49 +01:00
Bahadir Balban
0629ba3c1a
sys_write() "seems to" work. Also added support for sys_lseek().
2008-04-23 14:14:45 +01:00
Bahadir Balban
59bdaf22ec
Towards user buffer checking
2008-04-22 14:18:12 +01:00
Bahadir Balban
1270cfe3b3
open file descriptor references to vm files weren't properly initialised.
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This fixes the issue. sys_read/write yet to be inspected.
2008-04-22 01:41:18 +01:00
Bahadir Balban
e8bb529dcb
Now we save/restore utcb registers if we do a second ipc before returning the first.
2008-04-22 00:30:07 +01:00
Bahadir Balban
80470e2581
Adding reply phase to pager_sys_open()
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So that open() errors on pager's side can be noticed by vfs.
2008-04-21 15:30:40 +01:00
Bahadir Balban
a674cf2b27
Recompiled with write_cache_pages(). Implementation to be re-evaluated.
2008-04-21 00:31:16 +01:00
Bahadir Balban
e3cc14515c
mm0 compiles, still previous issues on.
2008-04-20 23:34:25 +01:00
Bahadir Balban
d8d65a6301
Efforts towards sys_write.
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- Added logic to calculate which pages are in the file and which are new
for writing.
- Nearly finished the template for sys_write.
- Need to implement write_cache_pages().
- Need to distinguish dirty/clean pages and implement flushing dirty
pages back to vfs.
2008-04-20 17:33:05 +01:00
Bahadir Balban
9992d100d7
Few fixes in libposix error checking.
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size_t is a non-negative type and negative error checking didn't work. Now fixed.
Fixed various issues with reading file pages in the sys_read() path.
2008-04-20 02:12:53 +01:00
Bahadir Balban
8b3fedc18d
Towards working sys_read/sys_write.
2008-04-19 15:42:13 +01:00
Bahadir Balban
9f4e400fed
Minor updates to README
2008-04-19 12:28:49 +01:00
Bahadir Balban
df0eccf7b3
A file can be created.
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Now up to sys_write() in pager, which needs to be filled in.
2008-04-19 01:27:41 +01:00
Bahadir Balban
ce26835968
fd wasn't returned in reorganised sys_open. Fixed.
2008-04-19 00:55:11 +01:00
Bahadir Balban
8c4c436925
Reorganised sys_open.
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vfs_create and mknod now returns the newly created vnode.
(which might be used by upper layers).
2008-04-19 00:40:48 +01:00
Bahadir Balban
f7163b7e93
Added file io test to test0. Added close call to libposix.
2008-04-18 21:17:09 +01:00
Bahadir Balban
cff7a505e8
Changed time representation to posix style struct timeval/ gettimeofday.
2008-04-18 13:58:37 +01:00
Bahadir Balban
5563cc1c6b
Minor changes on sys_time
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A get/set flag determines whether to read or write time.
2008-04-18 01:03:39 +01:00
Bahadir Balban
a87914910c
Added a new system call sys_timer.
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sys_timer accumulates timer ticks into seconds, minutes, hours and days.
It's left to the user to calculate from days into a date. It is not yet
known if the calculation is even roughly correct.
Reduced 2 kmem_reclaim/grant calls into one kmem_control call.
2008-04-18 00:46:29 +01:00
Bahadir Balban
73058dc249
Added sys_close() but its not done yet.
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close() needs to flush dirty buffers.
pager needs to have read/write support properly implemented.
open() needs to record mode and access times.
The need for access times means we need rtc and time implementation.
Also need to add stat() access() etc.
2008-04-17 21:47:37 +01:00
Bahadir Balban
58033e7927
CHDIR works.
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Lookups on different current directory, including /./././/// works as expected.
2008-04-16 16:00:17 +01:00
Bahadir Balban
730e7c210f
Added resolving of current directory in case lookup starts from current dir.
2008-04-16 14:48:05 +01:00
Bahadir Balban
9d32f840c0
Open wasn't returning the fd but 0 on success :-S. fixed.
2008-04-16 00:34:11 +01:00
Bahadir Balban
e722ee0115
Root was a child of itself, removed that relationship.
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Root is only a parent of itself, it shouldn't show up in its children.
2008-04-16 00:20:59 +01:00
Bahadir Balban
ab588c279b
Fixed the component-consumption-every-lookup problem.
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Now components only consumed on child lookup recursions.
2008-04-16 00:04:54 +01:00
Bahadir Balban
8a3da9c709
README update
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modified: README
2008-04-15 23:57:21 +01:00
Bahadir Balban
9a66893288
lookup return value was changed from -ENOENT to 0 when vnode not found,
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Fixed a point in code that expected 0.
Next: lookups should not consume from path every time called but only
when moving to children to lookup.
2008-04-15 23:45:46 +01:00
Bahadir Balban
577a2bffe4
Changed name of cml configuration
2008-04-15 19:43:35 +01:00
Bahadir Balban
9ba6638d01
Added new path parsing functions that work cleaner, better.
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Input paths are now parsed at the beginning and components
put into an ordered linked list headed by struct pathdata.
Lookup functions use these components to look up vnodes.
2008-04-15 19:36:07 +01:00
Bahadir Balban
fb249b0c5b
Fixed wrong directory name issue, strlen() was off by one.
2008-04-15 01:51:13 +01:00
Bahadir Balban
a9420d3dc9
mkdir almost working.
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Added changes to pathname lookup code so that the root
directory special case is handled properly.
2008-04-15 00:51:58 +01:00
Bahadir Balban