rvtr/twl_wrapsdk
1
Fork 0
mirror of https://github.com/rvtr/twl_wrapsdk.git synced 2025-10-31 06:11:10 -04:00
Code Issues Actions Packages Projects Releases Wiki Activity
master
twl_wrapsdk/build/libraries/fatfs/ARM7/revhst40.txt
shirait a7449d85df RTFSをver.44xからver.44zbへバージョンアップ 
git-svn-id: file:///Users/lillianskinner/Downloads/platinum/twl/twl_wrapsdk/trunk@321 4ee2a332-4b2b-5046-8439-1ba90f034370
2007-11-22 05:23:18 +00:00

2220 lines
103 KiB
Plaintext
Raw Permalink Blame History

=================================================================
Functional changes between version 4.4zb versus version 4.4za (March 16, 2007)
=================================================================
Bug fixes:
Fixed a finode structure memory leak that could occur if a removal event occured
under certain conditions. The bug has been present since 1994.
Fixed a bug that was under reporting block buffer freelist low water mark values.
The bug was only in the calculation of the low water mark and did not cause any
runtime errors.
Fixed a problem with FAT32 info block access routines that ran unnecessarily
slowly and could read beyond the end of a buffer.
Features enhancements:
Implemented a shell command to simulate a card removal
Added a new display_free_lists() diagnostic routine to print current usage
stats. This routine may be called to monitor buffer usage.
Changes by file:
apigfrst.c - Fixed a bug that caused a leak of one finode structure if a card removal
event occured with an outstanding call to pc_gfirst() without a completed call
pc_gdone().
prblock.c - Fixed a bug that was causing an error in the calculation that produced incorrect
block buffer freelist low water mark values. The bug was only in the calculation of
the low water mark and did not cause any runtime errors.
rtfs.h - Modified the blkbuffcntxt structure to maintain a count of outstanding scratch
buffer allocations. This is used to correctly calculate low water usage and
for diagnostics.
prblock.c - Modified block diagnostic routines that is enabled by compiling with DEBUG_BLOCK_CODE
enabled in prblock.c
.. Include line numbers in diagnostics
.. Added a new dignostic
display_free_lists(char *comment_string)
this routine prints usage stats about DROBJ, FINODE and BLKBUFF structures.
It can be called to display snapshot of resource usage and to detect leaks.
rtfat32.c - Modified code that accesses the on disk FAT32 info structure. The structure is now
accessed at byte offset 484 in the info block. Prvious code was wasting cycles and
scanning the info block for the info block signature.
appcmdsh.c - Reprogrammed the shell's EJECT command to send a media removal event to
the specified drive id's device handler. This will trigger a remove event
for removable media device drivers.
appcmdsh.c - Implemented a callable routine named eject_driveno() that software can call to simulate
simulate a card removal. Useful for measuring the affects of card removals at specific
times
apiinit.c - Configure the host disk device driver as removable so it can process EJECT commands
from the command shell.
=================================================================
Functional changes between version 4.4za versus version 4.4y (February 16, 2007)
=================================================================
Note Version 44z was an unpublished interim release.
Bug Fixes:
.. rtfatxx.c - Changed fatxx_clnext() detect chain termination if the cluster value
is greater than xff7, xfff7 or xffffff7 for fat12, 16 , 32 respectively.
The current code detected only xfff, xffff and xfffffff as terminators.
.. rtkernfn.c Fixed a bug in rtfs_get_system_user(). If NUMUSERS is greater than
one and we are reclaiming the default user (0), because not enough
user structures are avaliable, make sure the current working directory objects are
freed and the finode access counts are reduced
.. rtfat32.c Added defensive code to check for a valid start hint from the info block.
if it is out of range set it to the first cluster in the FAT. Eliminates a possible
error trap if start hint in the info block is incorrect.
.. rtfat32.c Modified the info block flush routine to update the infoblock start hint with the
previous start hint read from the info block. This forces the start hint to be 3 always on
volume that have been formatted and written to by RTFS only.
.. prfstest.c - Minor bug fixes
.. csjis.c Fixed bug in JIS version of pc_cs_malias(). Was causing an error if the 8th character in the
filename was a 2 byte character sequence.
.. Bug in pc_emumerate - Added test to eliminate possible endless loop
.. po_write - Fixed error processing on cluster allocation failure. The code was always returning
a short write status, the number of bytes written, when the cluster allocation failed. This was
assuming that the underlying code failed because it detected disk full, not because of some other
error. The change tests the value of errno and if it is not set to PENOSPC, it return -1.
apifilmv.c - Fixed an error that was in some cases leaving errno at zero and returning an error status.
Now this condition sets ERRNO to PEINVALIDPATH;
.. Changed how hidden sectors are handled by the format utilities. Previous support
for hidden sectors was incorrect. The new method is correct. Hidden sectors are
ignored completely except during the format procedure when the bpb hidden sector
fields are set to the starting block of the partition.
apifrmat.c pc_format_volume changed the logic to set set numhide in the format
control structure to be the starting block number of the current partition.
apifrmat.c Obscure change that allows device drivers to specify format parameters for
32 bit formats. Previously supported only fat16/fat12 because the feature
was intended for floppy disks, to match IBM PC formats.
rtfat16.c - Changed the way hidden sectors are used in format
rtfat32.c - Changed the way hidden sectors are used in format
rtlowl.c - Fixed bug that was only initializig the low 16 bits of the
pdr->numhide, information field. This field is not used by RTFS.
New features:
.. Added a new device driver to Rtfs. The windev device is only available for the
windows emulation environment. The windev driver accesses block devices directly on
a windows platform using raw block accesses.
portconf.h - Added INCLUDE_WINDEV conditional constant.
drwindev.c - Source code for the direct block access driver
apiinit.c - Added code to mount a windev device if INCLUDE_WINDEV is
enabled in portconf.h
.. Include a new special purpose fast file move function.
apifastmv.c - New file containing pc_fast_mv().
pc_fast_mv - Move a file to a filename in another subdirectoy when you know
the destination filename does not already exist in that directory.
(designed for moving multiple files from one subdirectory to another
subdirectory that is initially empty.)
=================================================================
Functional changes between version 4.4y versus version 4.4x (November 3, 2006)
=================================================================
apifilio.c
Fixed parameter passing in seek functions to fix changes in beginning of
file and end of file processing that was introduced with po_ulseek in version
44v.
apiint.c
winhdisk.c
Added minor changes to these files forcing routines to query the device drive
again for media parms after a low level format. This was done in order to
support device drivers that may change media parameters during a low level format.
Functional changes between version 4.4x versus version 4.4ws (August 25, 2006)
=================================================================
winhdisk.c - Removed some unreferenced performance diagnostic code that was
inadverdantly placed in the file.
appcmdsh.c - Modified optional macro DISPLAY_ERRNO() to use RTFS print
routines instead of printf.
Fixed bug in app_failsafe_init() that was inadvertantly
reporting failure when failsafe initialization had actually
succeeded.
prfstest.c - Modified optional macro FSDEBUG() to use RTFS print
routines instead of printf.
Fixed places where po_extend_file() was being called using
incorrect parameters. This error was introduced in version
44V and was not caught until now.
prfs.h - Added CFG_VALIDATE_JOURNAL option value. The description of this
option is:
CFG_VALIDATE_JOURNAL - Set this to one to force a a low level read of the
whole journal file before it is accessed. If any of the reads call Failsafe
tries to recover by re-writing the whole file with zeros, for some media
types this will correct a read error. When the overwrite is completed
the file is read again, if that succeeds we continue, otherwise the journal
file open fails. A disk mount that encounters this error will fail and
errno will be set to PEIOERRORREADJOURNAL
prfs.h - Added CFG_VALIDATE_JOURNAL option value. The description of this
option is:
CFG_VALIDATE_BUFFER_SIZE - This is the size, in blocks of the special
buffer dedicated to performing the tasks described in CFG_VALIDATE_JOURNAL.
The largest usable value for CFG_VALIDATE_BUFFER_SIZE is 128. Larger
values will not be utilized but memory will be wasted.
The whole journal file is scanned during startup in disk reads of up to
CFG_VALIDATE_BUFFER_SIZE blocks. Larger values will require fewer reads
and improve perfromance over smaller values.
The buffer is declared as:
static byte validate_buffer[CFG_VALIDATE_BUFFER_SIZE*512];
in prfsnvio.c.
If CFG_VALIDATE_JOURNAL is zero the value of CFG_VALIDATE_BUFFER_SIZE
is irrelevant because the buffer is not declared.
prfs.h - Added an additional internal field "open_status" to the failsafe context
that is used to differentiate between IO errors and other errors
during journal file re-opens
prfsapi.c - Remove one unreferenced label "ex_it" from the routine named
pro_failsafe_commit. There were no functional changes.
prfscore.c- Modified the routine failsafe_restore_internal() to return
FS_STATUS_IO_ERROR if failsafe_reopen_nv_buffer() reported
an IO error (while validating the journal file)
prfscore.c- Modified the routine pro_failsafe_autorestore() to fail and set
errno to PEIOERRORREADJOURNAL if failsafe_restore_internal()
returns FS_STATUS_IO_ERROR. This action is taken regardless of
whether auto-recover is enabled or not because it indicates an
unrecoverable media failure.
prfsnvio.c- Added code to implement the algorithm that is enabled when
CFG_VALIDATE_JOURNAL is enabled.
Functional changes between version 4.4ws versus version 4.4w (August 11, 2006)
=================================================================
rtfs.h - Added DRIVE_FLAGS_FILEIO Flag
apiwrite.c - Set DRIVE_FLAGS_FILEIO before writing file data in po_write
apifilio.c - Set DRIVE_FLAGS_FILEIO before read file data in po_read
apifilio.c - Set DRIVE_FLAGS_FILEIO before write file data in pc_flush_file_buffer
and restore previous setting
apifilio.c - Set DRIVE_FLAGS_FILEIO before read file data in pc_load_file_buffer
and restore previous setting
rtfat16.c - Modified pc_init_drv_fat_info16() to correctly distinguish between
FAT12 and FAT16 when clipping maxfindex to the number of sectors
reserved for clusters..
rtnvfat.c - Modified pc_parsepath()to skip leading spaces and
to replace trailing spaces NULLs
=================================================================
Functional changes between version 4.4w versus version 4.4v (June 1, 2006)
=================================================================
rtfs.h - Added po_extend_file() -prototype which was inadvertantly removed in
version 44v
Apirealt.c po_extend_file() - Fixed a bug that was calculating the number of
clusters to the end of the current file incorrectly under certain
circumstances.
Changed: line 222 from:
clusters_in_chain =
pc_chain_length(pdr, pfile->pobj->finode->fsize)-
pc_chain_length(pdr, pfile->fptr);
To:
{
dword ltemp,fptr_mod_cluster;
/* Round fptr down to cluster boundary */
fptr_mod_cluster = pfile->fptr & ~(pdr->byte_into_cl_mask);
/* Subtract from the rounded up alloced_size value */
ltemp = alloced_size-fptr_mod_cluster;
clusters_in_chain = ltemp >> (int) (pfile->pobj->pdrive->log2_secpalloc+9);
}
Apiinit.c - Changed the HostDisk file's base name, it was incorrectly set
to "E:\\demotest\\Hostdisk". It is now just Hostdisk.
=================================================================
Functional changes between version 4.4v versus version 4.4u (April 1, 2006)
=================================================================
rtfsconf.h - Added two new configuration parameters
RTFS_MAX_FILE_SIZE - Default 0xffffffff
Set to the maximum file size ERTFS may create. If po_chsize or po_extend_file()
are called with a size request larger than this they fail and set errno
to PETOOLARGE. When po_write() is asked to expend the file beyond this maximum
the behavior is determined by the value of RTFS_TRUNCATE_WRITE_TO_MAX */
RTFS_TRUNCATE_WRITE_TO_MAX - Default 1
Set to 1 to force RTFS to truncate po_write() requests to fit within
RTFS_MAX_FILE_SIZE. If RTFS_TRUNCATE_WRITE_TO_MAX is set to 0, po_write
requests that attempt to extend the file beyond RTFS_TRUNCATE_WRITE_TO_MAX
Fail and set errno to PETOOLARGE. If RTFS_TRUNCATE_WRITE_TO_MAX is set to
1, po_write requests that attempt to extend the file beyond
RTFS_MAX_FILE_SIZE are truncated to fill the file until its
size reaches RTFS_MAX_FILE_SIZE bytes.
rtfs.h - Added PETOOLARGE errno value. Set when and error occurs because
trying to extend a file beyond RTFS_MAX_FILE_SIZE
apiregrs.c - Added do_large_file_test() to test api calls on large
files (near 4 Gbyte)
apifilio.c - po_read() Truncate read operation if it wraps 4 Gbyte
apifilio.c - po_read() If passed NULL data pinter, read file without data
transfer
apifilio.c - created new API call po_ulseek() to seek across 4 Gbyte range
apifilio.c - created _po_ulseek() internal seek function with 4 Gbyte range
apifilio - change _po_lseek()internal seek to utilize _po_ulseek()
Apirealt.c po_extend_file() Changed API calling sequence and added support
for unsigned 32 bit offsets.
Apirealt.c po_extend_file() - Set error condition if new size
is greater than or equal to RTFS_MAX_FILE_SIZE
Apirealt.c po_chsize() changed offset to unsigned 32 bit.
Apirealt.c po_chsize() - Set error condition if new size
is greater than or equal to RTFS_MAX_FILE_SIZE
apiwrite.c - po_write() Truncate write operation if it wraps 4 Gbyte
apiwrite.c - po_write() if write will make file > RTFS_MAX_FILE_SIZE then
truncate the write request if RTFS_TRUNCATE_WRITE_TO_MAX is
set to 1. Otherwise fail with with PETOOLARGE errno value.
apiwrite.c - po_write() Use _pc_ulseek() if opened in append mode
apiwrite.c - Changed po_truncate() to use unsinged 32 bit offset
apiwrite.c - po_write() If passed NULL data pointer, write file without data
transfer
apiwrite.c - po_write() - Change to set file time and archive bit whenever
file is written to, not just when it is extended.
winhdsk.c - Updated to RTFS Pro Plus version, supports multigigabyte disks
and uses unbuffered win32 file io to better emulate a real disk.
Functional changes between version 4.4u versus version 4.4t (Jan 25, 2006)
=================================================================
Bug Fixes:
1. A change was made to open_failsafe_file() (prfsnvio.c) to fix a
bug in the code that allocated the contigous cluster chain for the
Journal file. It was a minor problem that caused Failsafe to skip
potentially available regions of space for the Journal file.
if (contig_clusters < n_clusters)
{
FATOP(pdrive)->fatop_freechain(pdrive, first_cluster, 0, 0xffffffff);
first_cluster = first_cluster+contig_clusters;
pdrive->free_contig_pointer = first_cluster+contig_clusters;
}
Was changed to
if (contig_clusters < n_clusters)
{
FATOP(pdrive)->fatop_freechain(pdrive, first_cluster, 0, 0xffffffff);
pdrive->free_contig_pointer = first_cluster+contig_clusters;
}
Functional changes between version 4.4T versus version 4.4S (Jan 9, 2006)
=================================================================
Bug Fixes:
1. A change was made to open_failsafe_file() (prfsnvio.c) to fix a
bug in the code the allocated the contigous cluster chain for the
Journal file.
The bug is described as follows:
In pseudo-code representation the algorithm worked as follows:
pdrive->free_contig_pointer = pdrive->free_contig_base;
first_cluster = 0;
try_again:
contig_clusters =
FATOP(pobj->pdrive)->fatop_alloc_chain(pobj->pdrive,
&first_cluster, n_clusters, FALSE);
if (contig_clusters != n_cluster)
{
free first_cluster to first_cluster+contig_clusters
first_cluster += n_clusters;
goto try_again;
}
The algorithm relies on the fact that fatop_alloc_chain() starts looking
for free clusters starting from the initial value passed in first_cluster.
If a cluster chain less than n_clusters was found this algorithm
appropriately advanced the start of the allocation region by
n_clusters and tried to the allocation allocate again, repeating
the process until n_clusters contigous cluster was allocated.
There was a BUG in the algorithm however:
A side effect of fatop_alloc_chain() is to link the cluster at
first_cluster (if it is non-zero) to the newly allocated contiguous
clusters. So after the first pass the algorithm was linking first_cluster
to the new chain, causing a lost cluster if first_cluster was not part of
a chain or causing crossed cluster chains if it was.
In pseudo-code representation the fixed algorithm works as follows:
pdrive->free_contig_pointer = pdrive->free_contig_base;
try_again:
first_cluster = 0;
contig_clusters =
FATOP(pobj->pdrive)->fatop_alloc_chain(pobj->pdrive,
&first_cluster, n_clusters, FALSE);
if (contig_clusters != n_cluster)
{
free first_cluster to first_cluster+contig_clusters
pdrive->free_contig_pointer += n_clusters;
goto try_again;
}
The algorithm relies on the fact that fatop_alloc_chain() starts looking
for free clusters starting from pdrive->free_contig_pointer if the initial
value passed in first_cluster is zero. If a cluster chain less than
n_clusters is found the algorithm appropriately advanced the start of the
allocation region (as determined by pdrive->free_contig_pointer) by
n_clusters and tries to the allocation allocate again, repeating
the process until n_clusters contigous cluster is allocated. Since
first_cluster is always passed as zero the bug in the previous
implementation is eliminated.
when end of file is reached on a read. A problem was discovered that
when a read to end of file was done with one open handle to the file
and the file was extend by writing to it from another open handle,
the next read call re-read the data at the old end of filem, not the
data that was just written to the file.
=================================================================
Functional changes between version 4.4S versus version 4.4R (OCt 25, 2005)
Bug Fixes:
1. A change was made to po_read() (apifilio.c) to set the eof flag
when end of file is reached on a read. A problem was discovered that
when a read to end of file was done with one open handle to the file
and the file was extend by writing to it from another open handle,
the next read call re-read the data at the old end of filem, not the
data that was just written to the file.
=================================================================
Functional changes between version 4.4R versus version 4.4Q (OCt 19, 2005)
Bug Fixes:
1. Several compile warnings were fixed. This includes adding some
#include lines in winsplsh.c and portkern.c.
2. A bug was discovered with the partition recognition code. ERTFS now
supports Windows extended partitions in addition to supporting DOS
extended partitions. This required a couple fixes in rtlowl.c.
3. A couple bugs were discovered with the FAT32 formatting code. The
binary volume label is now written and a value of 3 is written to the
next free cluster hint. The previous value of 2 was less correct and
caused MacOS to complain. These fixes affect rtfat32.c.
4. A bug was discovered that prevented formatting without
partitions due to the prior READ_PARTITION_NO_TABLE fixes. Fixing this
required a change in apifrmat.c.
5. A bug was discovered with the CHS normalization. Hard drives use a
different system for cylinder/head/sector numbers than the DOS file
system, so a conversion needs to happen. This conversion now supports
a greater number of hard drive sizes. These fixes affect apifrmat.c.
6. A bug was discovered where ERTFS could calculate the maximum cluster
index value incorrectly in some rare format dependant cases. This resulted
in a mount failure durint the initial cluster scan. Both rtfat32.c and
rtfat16.c were modified to test the calculated max index against the
number of sectors dedicated to fat blocks (secpfat) and truncate the
maximum index.
7. A bug was fixed in drideata.c. If the user data buffer is on an odd
address buffer ide_insw() and ide_outsw() now double buffer the data in
512 byte segments. This is needed because some architectures can not do
word transfers to odd alligned addresses
=================================================================
Functional changes between version 4.4Q versus version 4.4P (Dec 27, 2004)
Bug Fixes:
1. A bug was discovered with our fix for open_failsafe_file() in 4.4P.
To fix the problem, open_failsafe_file() was modified to free an allocated
cluster chain before exiting a certain loop.
=================================================================
Functional changes between version 4.4P versus version 4.4O (Dec 22, 2004)
Bug Fixes:
1. A bug was discovered in failsafe in which infinite loops could occur
while creating the failsafe file if disk space was low or fragmented.
To fix the problem, open_failsafe_file() was modified to start searching
from the beginning of the FAT if it hit the end, to catch that fact, and
then stop the search.
2. A bug was discovered in failsafe which caused false positives using the
FS_STATUS_OUT_OF_DATE feature. To fix the problem, the task of copying
sectors was split into several functions, copying the non-FAT blocks
first, the FAT blocks second, and the FSINFO sector last.
3. A bug was discovered with the FAT formatting code which caused some
third party utilities to not recognized drives formatted with ERTFS.
To fix the problem, pc_mkfs16() and pc_mkfs32() were modified to write
a required signature at the end of the first disk sector. Because this
signature was previously used in ERTFS as a flag for whether the drive
was partitioned, pc_read_partition_table() had to be changed. To fix
this, all lines where the function returned READ_PARTITION_NO_ENTRY were
changed to return READ_PARTITION_NO_TABLE instead.
4. A bug was discovered with the FAT formatting code which caused large
drives to be formatted with the wrong size and number of clusters. To
fix the problem, get_format_parameters() was changed to use Microsoft-
recommended values and cleanly handle when FAT32 is turned off.
5. A bug was discovered with large I/O which caused IDE I/O larger than
128 blocks or more generic I/O larger than 65535 blocks to fail. To
fix the problem, ide_io() was renamed to _ide_io() and a new ide_io()
was written as a wrapper to loop calls to _ide_io() with 128 blocks each
time. Also, po_write() and po_read() were modified to correctly loop
over a block count greater than 0xffff.
6. A bug was discovered with the linear flash driver (drflsftl.c) and
failsafety. If the power was turned off at certain moments while copying
a block, the driver would either incorrectly format or just not handle the
drive. To fix the problem, the erase count is always set when copying a
block, and the driver recovers from a power-off right before setting the
target block as a DATA block.
New Features:
1. JIS encoding support has been expanded to include Microsoft's CP932.
This is a super-set of JIS and adds NEC special characters (83 characters),
NEC-selected IBM extended characters (374 characters), and IBM extended
characters (388 characters). In addition, seven incorrect character
mappings have been corrected. See csjistab.c for the new tables.
=================================================================
Functional changes between version 4.4O versus version 4.4N (Nov 09, 2004)
Bug Fixes:
One minor change was made to pc_findin() in rtnvfat.c and rtvfat.c. The
change prevents volume labels from appearing when the flags GET_INODE_MATCH
or GET_INODE_DOTDOT are used. This allows the creation of files with the
same name as the volume label, but volume labels will still appear when using
pc_gfirst() and friends. Volume labels have the AVOLUME attribute set to
tell them apart.
=================================================================
Functional changes between version 4.4N versus version 4.4M (July 23, 2004)
Bug Fixes:
Two minor changes were made to FailSafe mode. These changes were made to
force all of ERTFS's cached information to be flushed before every failsafe
commit operation.
1. A bug was discovered in failsafe in which the FATs where not being
updated from the FAT buffer pool to disk before the auto_commit function
was called. To fix the problem pro_failsafe_commit_internal was modified
to call flush_fat(). Also, the call to flush_fat was removed from
pro_failsafe_commit() because it is now being done inside
pro_failsafe_commit_internal, which is called by pro_failsafe_commit().
This forces flush_fat to be called from both the api layer
pro_failsafe_commit() and from the automatic layer pro_failsafe_auto_commit()
2. A bug was discovered in failsafe in which cached directory entries
were not being updated from the internal finode cache to the journal file
before failsafe commit completed. Two fix it Pro_failsafe_commit_internal
was modified to force a flush of cached directory entries to disk before
proceeding
New Features
1. Created PO_AFLUSH file open flag to automatically force a flush of a
file every time time it is written to.
Summary of changes:
1. apifilio.c po_close() - remove call to pc_flush_file_buffer() this is
now done in _po_flush().
2. apiwrite.c po_write() - Added support for PO_AFLUSH flag
3. apiwrite.c _po_flush() - Add call to pc_flush_file_buffer()
4. apiwrite.c po_flush() - remove call to pc_flush_file_buffer() this is
now done in _po_flush().
5. prfsapi.c - Remove call to flush_fat. This is now done inside
6. prfscore.c pro_failsafe_commit_internal() - Added caals to
pc_flush_all_fil() and flushfat().
7. RTFS.H Added PO_AFLUSH file open flags
=================================================================
Functional changes between version 4.4M versus version 4.4L (June 8, 2004)
Bug Fixes:
1. A bug was found and repaired in the fat swapping code. The bug occurs when
a new fat block must be cached but there are no free blocks and no
unmodified blocks in the cache to swap with. In this case a "dirty"
block must be written to disk and then released for re-use.
pc_map_fat_block() had a bug in it that resulted in only the first copy of
the fat being written in this case. The bug is fixed in this release. It
is serious in nature, causing check disk or scan disk to report that the
FATs are missmatched, but in practice it doesn't actually happen that often
because ERTFS's FAT flush policies rarely leave "dirty" fat blocks cached for
long.
2. A bug was found and fixed in po_extend_file() which left the file pointer
at the wrong position if the extend feature failed.
3. Made unicode byte order handling code aware of KS_LITTLE_ENDIAN flag
instead of requiring a seperate localized configuration value.
4. Fixed a bug in drideata.c, the driver had been polling the status
register without allowing the settling time as prescribed by the
ATA specification.
Summary of changes:
1. Restructured the FailSafe method first introduced in version 4.4E to
reduce ram requirements and improve flexibility and efficiency.
2. Introduce FailSafe autocommit mode. In this mode ERTFS automatically
performs the FailSafe commit function each time an API call is made that
changes the contents of the volume structure.
3. Introduce FailSafe autoinit mode. In this mode ERTFS automatically
initializes specific devices for FailSafe operation at start up. This
function along with the autrestore, autorecover and autocommit modes
provide a means to make FailSafe operation completely transparent to the
programmer and the user.
4. Greatly expanded the FailSafe test function to test all modes of FailSafe
and validate the functionality of each ERTFS API call in FailSafe mode.
5. Renamed the check disk function from check_disk() to pc_check_disk and
added parameters to pc_check_disk() that return status information,
control diagniostic output and whether to save or discard lost
cluster chains.
6. Renamed STAT to ERTFS_STAT. Some run time environments like
micro-Itron use the type STAT. The same structure is used in ERTFS so to
avoid clashes we renamed typedef struct stat {} STAT; to
typedef struct ertfs_stat {} ERTFS_STAT;
7. Modified the mount procedure to support mounting devices that may
contain just a bios parameter block (bpb) or both a master boot
record (mbr) and a bios parameter block (bpb).
8. Added support to drideata.c to support removable TRUE-IDE devices along
with the existing support for removable pcmcia devices.
9. Added support to drideata.c and pcmctrl.c to support removable
pcmcia devices by polling for a status change. This method will
work if the pcmcmia controller does not have a media changed
interrupts source but does support a media changed status latch
functions.
Detailed description of changes:
These files were removed and replaced with other files.
prfailsf.c - File was removed
prfailsf.h - File was removed
These files were added.
prfs.h - New file that replaces prfailsf.h. It is
automatically included from rtfs.h when INCLUDE_FAILSAFE is enabled.
prfsapi.c - New file that contains FailSafe API calls.
prfscore.c - New file that contains the core FailSafe algorithm.
prfsnvio.c - New file that contains the Journal file interface.
rtfspro.h - This is a new file that contains miscelaneous
function prototypes and definitions that are available only with
RTFS-Pro. rtfspro.h is automatically included by rtfs.h in the
RTFS pro package.
prapipro.c - This is a new file that contains miscelaneous API
calls that are available only with RTFS-Pro. In this release prapipro.c
contains the source code for the routines pro_buffer_status() and
pro_assign_buffers()
These files were modified.
rtfs.h - Several changes were made to support
. Created CHKDSK_STAT structure to be used as an argument
. renamed STAT structure to ERTFS_STAT
to pc_check_disk()
. Created errno PEIOERRORREADJOURNAL
. Created errno PEFSREINIT
. Changed function protoype for new versions of
pc_regression_test(), and pc_check_disk().
. created DRIVE_FLAGS_FAILSAFE to support FailSafe
Autoinit mode.
. Changed RTFS.H to include prfs.h if FailSafe is enabled
. Changed RTFS.H to include rtfspro.h if RTFS-Pro is enabled
rtfsconf.h
. Added INCLUDE_RTFS_PRO compile time configuration constant.
prblock.c - Fixed a bug in pc_map_fat_block() that resulted
in only the first copy of the FAT being updated during some
swap condition
apirealt.c - Fixed a bug in po_extend_file() which left the file's
seek pointer at the end of the file if the File extend failed.
appcmdsh.c - Modified the code to support the new calling
sequences for check disk, regression test and FailSafe.
Changed all references to STAT to ERTFS_STAT
apistat.c - Changed all references to STAT to ERTFS_STAT
rttermin.c - Changed all references to STAT to ERTFS_STAT
csstrtab.c - Minor changes to strings used by the test command shell.
csstrtab.h
csunicod.c - Made byte order code aware of KS_LITTLE_ENDIAN flag
drideata.c - In ide_do_command() when performing a write operation
poll the alternate status register several time before testing
for busy to provide the required 400 nsec settle time.
rtlowl.c - new feature -
Modified pc_i_dskopen() to test if a device has a valid BPB (logical
block 0) and continue the mount process even if it has no MBR
(partition table). This specifically supports compact flash cards
fromatted with XP, which puts no MBR on the card.
apiregrs.c - A new argument was added to pc_regression_test(). The
new argument (do_clean) if TRUE tells the regression test to
execute multiple passes and delete all files an subdirectories
created in each pass. If do_clean is FALSE the regression test
stops after one pass and leaves all files and directories present.
rtfatxx.c - fatxx_alloc_chain() - Added dolink argument to be able
to control whether we link to start cluster if it was provided.
This argument was added for failsafe to support allocating from
a starting point but not linking to the start point.
apichkdsk.c - Renamed the check disk function from check_disk() to
pc_check_disk and added several parameters.
pstat - a pointer to a structure of type CHKDISK_STATS.
pc_check_disk returns information about the disk in this structure.
typedef struct chkdisk_stats {
dword n_user_files; /* Total #user files found */
dword n_hidden_files; /* Total #hidden files found */
dword n_user_directories; /* Total #directories found */
dword n_free_clusters; /* # free available clusters */
dword n_bad_clusters; /* # clusters marked bad */
dword n_file_clusters; /* Clusters in non hidden files */
dword n_hidden_clusters; /* Clusters in hidden files */
dword n_dir_clusters; /* Clusters in directories */
dword n_crossed_points; /* Number of crossed chains. */
dword n_lost_chains; /* # lost chains */
dword n_lost_clusters; /* # lost clusters */
dword n_bad_lfns; /* # corrupt/disjoint win95 lfn chains */
} CHKDISK_STATS;
verbose - If this parameter is 1 pc_check_disk() prints status
information as it runs, if it is 0 pc_check_disk() runs silently.
fix_problems - If this parameter is 1 pc_check_disk() will make
repairs to the volume, if it is zero, problems are reported but
not fixed.
write_chains - If this parameter is 1 pc_check_disk()
creates files from lost chains. If write_chains is 0
lost chains are automatically discarded and freed for re-use.
If fix_problems is zero then write_chains has no affect.
apiinit.c - Added support for auto initializing FailSafe operation
on a device if the user assigns DRIVE_FLAGS_FAILSAFE to the devices
the drive flags.
prfstest.c - This is the source code for the function fs_test() that
is documented in the FailSafe manual. In this version fs_test() was
completely re-written to be more comprehensive and test new FailSafe
features.
Functions in the following files were modified to support FailSafe's
autocommit feature. The epilogue code for functions that may modify
the FAT or directory blocks now call release_drive_mount_write()
instead of release_drive_mount(). In autocommit mode
release_drive_mount_write() performs a failsafe commit if necessary.
apideltr.c - pc_deltree()
apifilio.c - po_open(), po_close()
apifilmv.c - pc_mv(), pc_unlink()
apimkdir.c - pc_mkdir(), pc_rmdir()
apirealt.c - po_extend_file()
apiwrite.c - po_write(), po_truncate(), po_flush(), pc_diskflush()
prblock.c - Changes were made to support the new FailSafe method.
. Several new functions were created to distinguish when
disk access is being performed on directory and FAT blocks.
block_devio_read(), block_devio_write(), fat_devio_write() and,
fat_devio_read(). If Failsafe is enabled routine in prfscore.c
replace these functions to provide a journalling feature.
. pc_find_block is no longer a static function because it
is now called from the FailSafe layer.
. pc_read_block(), pc_write_block(), pc_flush_chain_block()
pc_flush_fat_blocks() and pc_map_fat_block() are modified
to replace the previous FailSafe method with the new scheme.
rtdevio.c - Changes were made to support the new FailSafe method.
. A new routine, release_drive_mount_write() was created
to support the Failsafe autocommit feature.
. check_media() was modified to support the new FailSafe
method.
rtfat32.c - fat_flush_info() was modified to use the block buffer
pool instead of direct io. This change was needed for the new
FailSafe method.
rtfatxx.c - fatxx_flushfat() was modified to support the new
FailSafe method. It no longer needs any FailSafe specific code
=================================================================
Functional changes between version 4.4L versus version 4.4K
Summary of changes:
1. The method for closing out a drive when media removal events and
unrecoverable media IO errors.
2. Support for buffered file IO has been added
3. Changes were made to detect if a disk mount was closed between calls to
po_gfirst, po_gnext and pc_gdone.
4. A potential buffer overwrite in the routine pc_partition_media() that may
occur with certain compilers has been eliminated.
5. pc_free_scratch_blk() was modified to fix a small problem that could cause
pro_buffer_status() to return an incorrect value for block_buffers_low.
Detailed description of changes:
The method for closing out a drive when media removal events and unrecoverable
media IO errors has changed. Under the old method the thread that detected the
failure imediately called pc_dskfree(). Under the new method a flags named
mount_abort is set when the error is detected. Later on, in the new routine
release_drive_mount(), before exlusive access to the drive is relinquished,
the flag is checked, and if it is true, pc_dskfree() is called. This method
eliminates race conditions in multitasking environments.
rtdevio.c - check_drive_name_mount(), check_drive_number_mount() These
new functions validate and/or initiate the mount and then lock the drive
before returning.
rtdevio.c - check_drive_number_present(). This is a new function
that clears any media removal status and then checks if media is installed.
rtdevio.c - release_drive_mount(), This is a new function that checks
the pdr->mount_abort flag and if true, calls pc_dskfree() before releasing
the semaphore.
rtdevio.c - As a precaution check_media(), when it is working on
behalf of check_drive_name_mount() or check_drive_number_mount(), checks
the abort flag and if set calls pc_dskfree() before remounting the disk.
rtdevio.c - check_media_entry() and check_media_io(),
card_failed_handler() now set the mount_abort flag in the drive structure
if an error occurs. They do not call pc_dskfree().
The following routines were modified to take advantage of the new
functions check_drive_name_mount(name); and check_drive_number_mount(drivno);
these routines are like the previous check_drive() function which validates
and makes sure the device is mounted. If the drive is valid, the new
functions return with the drive's semaphore locked. These routines are also
modified to call release_drive_mount(driveno) instead of
OS_RELEASE_LOGDRIVE(driveno). release_drive_mount(driveno) checks to see if
the drive mount became invalid by an error or media removal event. If so,
it closes the drive structure and releases its buffers.
apideltr.c - pc_deltree()
Apirealt.c - pc_cluster_size(), pc_raw_read(), pc_raw_write()
Apigetwd.c - pc_pwd()
Apigfrst.c - pc_gfirst()
prfailsf.c - pro_failsafe_init(), pro_failsafe_commit(),pro_failsafe_restore()
apiinfo.c - pc_free(),pc_is(),pc_get_attributes(),
APIMKDIR.C - pc_mkdir(),pc_rmdir()
Apisetwd.c - pc_set_cwd()
Apiwrite.c - pc_diskflush(),pc_set_attributes()
apistat.c - pc_stat()
Apifilmv.c - pc_mv(), pc_unlink()
apickdsk.c - check_disk()
Apifilio.c - po_open()
Apifilmv.c - A simple change was also made to change the order in which the
drive id's are validated to be more efficient.
The following routines were modified to call the new routine named
check_drive_number_present(driveno); instead of check_media() routine
to first clear any pending drive changed status, and then
to test if media is present. This works the same as the old function
call check_media(). check_media() is now a static function in
rtdevio.c that is called by check_drive_number_present() and
check_drive_name_mount(); and check_drive_number_mount().
rtfat16.c - pc_mkfs16()
rtfat32.c - pc_mkfs32()
apiinit.c - auto_format_disk()
prfailsf.c - pro_failsafe_init()
appcmdsh.c - doformat()
Apifilio.c - pc_enum_file() - This routine was modified clear the
file structure's drobj field if it was called on behalf of a media
removal or failure. pc_enum_file frees the file's structures but leaves
the file in the closed state. pc_fd2file() will recognize this state and
set errno == PECLOSED. po_close must be called on the file to clear this
Apifilio.c - pc_fd2file() - This routine was modified so that when it
does return a valid file structure, the associated drive is locked. When it
returns failure it does not lock the drive. This routine works in harmony
with po_close() and the free all files part of pc_dskfree() to ensure proper
behavior when a disk is closed as a result of a removal event or media failure.
Apifilio.c - po_close() - This routine was modified so that it clears
the PECLOSED error and frees the file if it is in the closed state.
The following routines were changed in order to use a new feature of
pc_fd2file(). Users of pc_f2dfile no longer have to call OS_CLAIM_LOGDRIVE()
since pc_fd2file locks the drive for them. The following routines were
modified to support this feature. They were also changed to call
release_drive_mount(driveno) instead of OS_RELEASE_LOGDRIVE(driveno) to
release the drive and to free its resources if an error was detected.
Apifilio.c - po_open(), po_read(), po_sleek(), po_close()
APickdsk.c - build_chk_file()
Apirealt.c - po_extend_file(), pc_get_file_extents()
Apiwrite.c - po_write(), po_truncate(), po_flush()
Apistat.c - pc_fstat()
Note that po_chsize() is not modified because it is not an atomic
function.
The following changes were made to catch possible problems that could
occur if a device was closed and remounted between calls to pc_gfirst,
pc_gnext, and pc_gdone().
rtlowl.c - pc_i_dskopen() when a disk open succeeds increase the global
count of opens, prtfs_cfg->drive_opencounter, and assign it to
pdr->drive_opencounter. This number is unique to each sucessful mount.
Apigfrst.c - pc_gfirst() set statobj->drive_opencounter to
pdrive->drive_opencounter when the call succeeds.
Apigfrst.c - pc_gnext(), pc_done(). Compare statobj->drive_opencounter to
pdrive->drive_opencounter. If they are not the same then fail.
The following changes were made to support buffering of non block alligned
file data.
ERTFS.H - Added PO_BUFFERED file open flags
ERTFS.H - Added OF_BUFFERED flag to the finode structure.
ERTFS.H - Add "struct blkbuff *pfile_buffer" field to the finode
structure.
ERTFS.H - Add "int file_buffer_dirty" field to the finode structure.
APIFILIO.C - Created three new functions to support buffered file io.
pc_flush_file_buffer(PC_FILE *pfile) - If the finode structure that
the file points to contains a file buffer that has been modified
but not written to disk, write the data to disk.
pc_load_file_buffer(PC_FILE *pfile, dword new_blockno) If new_blockno
is 0, and the finode structure that the file points to contains a
file buffer, then flush and then discard the file_buffer.
If new_blockno is not 0, and the finode structure that the file
points to contains a file buffer, then flush and then load the
file_buffer with the contents at new_blockno.
pc_sync_file_buffer(PC_FILE *pfile,
dword start_block, dword nblocks, BOOLEAN doflush)
If the finode structure that the file points to contains a file
buffer that is in the range of start_block to start_block+nblocks,
Then:
1. If doflush is true and the buffer has been modified,
write the data to disk.
2. Discard the buffer
APIFILIO.C - po_open() - Added the following section to the open flags
processing part.
if (flag & PO_BUFFERED)
pobj->finode->openflags |= OF_BUFFERED;
APIFILEIO.C - po_read() modify section of code that handles non
block alligned writes. Do not discard the buffer if the
underlying finode is set for buffered IO, use the
*pfile_buffer field instead.
APIFILIO.C - po_read() modify section that handles block alligned
data reads. First call pc_sync_file_buffer() and
instruct it to flush to disk buffered data that overlaps
with the blocks to be read.
APIFILIO.C - po_close() modify to write the file buffer
if needed before closing the file. The buffer is freed
when pc_memory_finode() is called to free the finode.
APIREGRS.C - Add do_buffered_file_test(void) to the regression test.
APPCMDSH.C - Change docat() to use buffered IO and read one character
at time.
APIWRITE.C - po_write() modify section of code that handles non
block alligned writes. (a write of non alligned data
consists of a read/merge/write sequence). Do not discard
the buffer if the underlying finode is set for buffered IO,
use the *pfile_buffer field instead.
APIWRITE.C - po_write() modify section that handles block alligned
data writes. Call pc_sync_file_buffer() and instruct it
to purge, rather then write, buffered data that overlaps
with the blocks to be written.
APIWRITE.C - po_truncate() Before truncating the file, call
pc_load_file_buffer(pfile, 0) to make sure the
file buffer is written to disk if needed and then
discarded.
APIWRITE.C - po_flush() call pc_flush_file_buffer() to make sure the
file buffer is written to disk if needed.
PRBLOCK.C - Eliminate pc_read_file_block() subroutine. This is now done
by pc_load_file_buffer().
PRBLOCK.C - Eliminate pc_write_file_block() subroutine. This is now done
by pc_flush_file_buffer().
RTKERNFN.C - pc_memory_finode(). When freeing a finode, added code to
check if the finode contains a file buffer, and if so,
release the buffer.
Other miscelaneous changes.
It was discovered that with some compilers sizeof(PTABLE) is
larger than 0x42 because of structure packing problems at the
end of the PTABLE. This caused a buffer pool corruption
problem after using pc_partition_media()
APIFRMAT.C pc_partition_media() the line of code that used
the expression:
copybuff((pbuf + 0x1be), &part, sizeof(PTABLE));
to
copybuff((pbuf + 0x1be), &part, 0x42);
RTLOWL.C - pc_read_partition_table() changed two lines of code that used
the expression:
copybuff(buf->data, pbuf, sizeof(PTABLE));
to
copybuff(buf->data, pbuf, 0x42);.
Remove spurious line of code that was accidentally introduced in
vesion 44f. This was not causing a runtime problem since the logic
is the same.
APIMKDIR.C - pc_mkdir()
The lines:
if (!pc_parsepath(path,filename,fileext,name))
/* Get out the filename and d:parent */
if (!pc_parsepath(path,filename,fileext,name))
Are changed to:
/* Get out the filename and d:parent */
if (!pc_parsepath(path,filename,fileext,name))
PRBLOCK.C - pc_free_scratch_blk(), modify code to set
pblk->block_state = DIRBLOCK_FREE and to increment
pbuffcntxt->num_free. This fixes a small problem
that could cause pro_buffer_status() to return
an incorrect value for block_buffers_low.
APICHKDSK.C - print_chkdsk_statistics() - Changed a line that
was printing free kilabytes remaining when
it was supposed to print the number of free sectors
remaining.
====================================================================
Functional changes between version 4.4K versus version 4.4J
Major changes - Added errno value PECLOSED. This error number is set
by pc_fd2file() when access to a file descriptor is requested that was
marked closed by pc_dskclose. The version 44K users manual documents that
if a file operation fails with errno set to PECLOSED the application should
call po_close() on the file descriptor to clear the condition.
====================================================================
Functional changes between version 4.4J versus version 4.4I
Major changes -
Change pc_dskclose() so that files opened on a volume that is being closed
are marked as closed but the files are not released. po_close() must still
be called to release the file. This eliminates the possibility of one thread
accidentally using a file descriptor that was closed out but re-used by
another thread and now is associated with a different file.
apifilio.c - po_close() - If pc_fd2file() fails check if the FD is
in the closed state and if so free it.
apifilio.c - pc_fd2file() - Check file's is_closed setting, if it
is set pc_fd2file() fails. pc_fd2file() fix minor bug, was checking
if (0 <= fd && fd <= pc_nuserfiles())
corrected to:
if (0 <= fd && fd < pc_nuserfiles())
apifilio.c - pc_enum_file() - Do not enumerate files in the closed state.
apifilio.c - pc_enum_file() - ENUM_FREE now marks the file as closed but
does not mark it free.
rtfs.h - Add int is_closed; as a field in the pc_file structure;
Change default drive handling so the init code stores the lowest valid device
in the prtfs_cfg structure. When the user retrieves the current working drive
we use the value from prtfs_cfg structure if the user has not explicitly called
pc_setdfltdrv().
apiinfo.c - pc_set_default_drive() - When the drive is set, also set the
dfltdrv_set field in the user structure to indicate that the default drive
was set explicitly.
apiinfo.c - pc_getdfltdrno() - Use the value from prtfs_cfg structure if the
user has not explicitly called pc_setdfltdrv() (indicated by
user->dfltdrv_set not equal 0)
apiinit.c pc_ertfs_init() - As the devices are initialized set
prtfs_cfg->default_drive_id to the lowest valid drive id, as indicated
by the warmstart routine succeeding.
rtutil.c - pc_parsedrive() - Validate the drive number even if it is the
default drive id.
rtfs.h - Add int dfltdrv_set; as a field in the RTFS_SYSTEM_USER structure;
rtfs.h - Add int default_drive_id; as a field in the RTFS_CFG structure
====================================================================
Functional changes between version 4.4I versus version 4.4H
Major changes -
Change pc_mknode() so that ".", ".." and their parent directory are
all guaranteed to have the same date stamp.
Change rtkernfn.c, apiinit.c and rtfs.h to store the LOGICAL_DRIVE
semaphore handle in the drive structure rather then in an array of 26
possible logical drives. This fixes a bug where uninitialized semaphore
handles were used for logical drives when a logical drive's drive number
was greater than the NDRIVES configuration value.
Change rtlowl.c to support extended DOS partitions. This feature must be
enabled at compile time since it is rarely needed.
Change rtvfat.c to fix a bug where we were hanging an argument in place
from "*.*" to "*". This caused the library to missbehave if the argument
came from the string constant area of ROM.
Change csjis.c pc_patcmp_3(). Fixes a bug that incorrectly truncates JIS
.3 extensions to 2 characters.
rtdrobj.c - At approximately line 605. In pc_mknode(). Change calls to
pc_init_inode to "." and ".." to use the date value used to initialize the
subdirectory. This way the directy, "." and ".." will always have the same
timestamp.
crdate.time = pobj->finode->ftime;
crdate.date = pobj->finode->fdate;
pc_init_inode( &lfinode, dot_str,null_str, ADIRENT|ARCHIVE,
cluster, /*size*/ 0L , &crdate);
/* And to the buffer in intel form */
rtkernfn.c - At approxiomately line 30. in rtfs_resource_init(void). Remove
loop that allocates drive semaphores. This is now done in pc_rtfs_init().
apiinit.c - At approximately line 270 - Allocate semaphores and assign them
to the drive structure.
/* Allocate semaphores for all drives here and assign them to the
drive structures. If an allocation fails, fail to initialize */
pdr = prtfs_cfg->mem_drives_structures;
for (j = 0; j < prtfs_cfg->cfg_NDRIVES; j++, pdr++)
{
/* make sure this drive has a semaphore associated with it */
pdr->access_semaphore = rtfs_port_alloc_mutex();
if (!pdr->access_semaphore)
return(FALSE);
}
RTFS.H - At line 433 add an access semaphore field to the DDRIVE structure.
/* Access semaphore for the drive. This is initialized in pc_ertfs_init
from a value in value prtfs_cfg->drive_semaphores[i] */
dword access_semaphore;
RTFS.H At line 1260 - change OS_CLAIM_LOGDRIVE() and OS_RELEASE_LOGDRIVE()
macros to use the handle store in the drive structure.
#define OS_CLAIM_LOGDRIVE(X) rtfs_port_claim_mutex((prtfs_cfg->drno_to_dr_map[X])->access_semaphore);
#define OS_RELEASE_LOGDRIVE(X) rtfs_port_release_mutex((prtfs_cfg->drno_to_dr_map[X])->access_semaphore);
RTFS.H At line 1308 - remove drive_semaphores[] array from the RTFS_CFG
structure definition.
rtvfat.c At line 1057, modify the routine pc_patcmp_vfat() so it no
longer modifies the pattern argument in-place to convert "*.*" to "*"
if VFAT is supported. This was a bug since the arguments ("*.*") could
come from a constant string, which could be constant data
rtfsconf.h - At line 51. Create #define SUPPORT_EXTENDED_PARTITIONS, set to
1 to support DOS extended partitions.
Lowl.c - AT line 255. Added support for DOS "Extended Partitions". This code
must be enabled by setting SUPPORT_EXTENDED_PARTITIONS, in rtfsconf.h to 1.
#if (SUPPORT_EXTENDED_PARTITIONS)
{
/* Special code to support extended partitions */
/* since most applications don't use these we compile it
conditionally to save code space */
dword extended_base, ltemp;
int j, skip_count;
for (j = 0; j < 4; j++)
{
if (ppart->ents[j].p_typ == 5)
{
if (j <= (int)pdr->partition_number)
{
/* the partition is inside an extended partition */
/* Get the relative start and size */
pdr->partition_base = to_DWORD ((byte *) &ppart->ents[j].r_sec);
extended_base = pdr->partition_base;
pdr->partition_size = to_DWORD ((byte *) &ppart->ents[j].p_size);
skip_count = (int)pdr->partition_number - j;
for (;;)
{
/* Read the partition information in the extended partition */
if (!devio_read(driveno, pdr->partition_base , buf->data , 1, TRUE))
{
/* Failed reading Master boot record */
rtfs_set_errno(PEIOERRORREADMBR);
ret_val = READ_PARTION_IOERROR;
goto done;
}
/* Copy the table to a word alligned buffer */
pbuf = buf->data;
pbuf += 0x1be; /* The info starts at buf[1be] */
copybuff(buf->data, pbuf, sizeof(PTABLE));
ppart = (PTABLE *) buf->data;
if (to_WORD((byte *) &ppart->signature) != 0xAA55) /*X*/
{
rtfs_set_errno(PEINVALIDMBR);
ret_val = READ_PARTION_NO_TABLE;
goto done;
}
if (skip_count==0)
{
if (pc_validate_partition_type(ppart->ents[0].p_typ))
{
pdr->partition_type = ppart->ents[0].p_typ;
ltemp = pdr->partition_base;
pdr->partition_base = ltemp + to_DWORD ((byte *) &ppart->ents[0].r_sec);
pdr->partition_size = to_DWORD ((byte *) &ppart->ents[0].p_size);
ret_val = READ_PARTION_OK;
goto done;
}
else
{
rtfs_set_errno(PEINVALIDMBROFFSET);
ret_val = READ_PARTION_NO_ENTRY;
goto done;
}
}
else
{
if (ppart->ents[1].p_typ != 5)
{
rtfs_set_errno(PEINVALIDMBROFFSET);
ret_val = READ_PARTION_NO_ENTRY;
goto done;
}
pdr->partition_base = extended_base + to_DWORD ((byte *) &ppart->ents[1].r_sec);
pdr->partition_size = to_DWORD ((byte *) &ppart->ents[1].p_size);
skip_count -= 1;
}
}
}
}
}
}
/* Fall through to here if not in an extended partition */
#endif /* (SUPPORT_EXTENDED_PARTITIONS) */
====================================================================
Functional changes between in version 4.4H versus version 4.4G
Major functional changes:
apigetcwd.c In pc_l_pwd modified source code to clean up correctly if the
depth of the current working directory depth exceeds the compile time
variable OBJDEPTH.
appcmdsh.c - Added FAILSAFE test routines if INCLUDE_FAILSAFE_CODE is
enabkled.
csjis.c - Fixed bug in pc_ascii_fileparse with was truncating files
with greater than 8.3 components to 7.2. Files are now correctly truncated
to 8.3 format.
csstrtab.c - Added prompts for calling FAILSAFETEST. Prompts are only used
when failsafe is enabled.
prblock.c -
In pc_map_fat_block change the order of evaluation of block status blocks
and query failsafe. This is a simple optimization to cut down on
subroutine calls.
In pc_map_fat_block in FAILSAFE mode change the error condition to
PERESOURCEFATBLOCK if no fat blocks are available.
prfailsf.c - Initial supported failsafe release
prfailsf.h - Initial supported failsafe release
rtdrobj.c - In pc_mknode() at line 606 call pc_init_inode for the ".."
entry passing it the date value that was retieved from the system
when it was assigned to ".". This way . and .. always have the same
time stamp.
winhdisk.c - Modified driver to emulate a removable device. Test code can
now pass remove events to the host disk driver and it will simulate a
no media CHANGED condition.
prfstest.c - New file containing test code for failsafe mode. This test
code is designed to run in the windows host disk environment.
====================================================================
Functional changes between in version 4.4G versus version 4.4F
Major functional changes:
In prblock.c - Added the routine pc_flush_chain_blk to support flushing
all blocks associated with a subdirectory's cluster chain
At line 535 added the routine:
void pc_flush_chain_blk(DDRIVE *pdrive, CLUSTERTYPE cluster)
In drmmccrd.c - Many changes to support mmc in the rtfs4.0 environment.
In drflsftl.c - Added support for using a ram base sector map to speed
up accesses. The code is fixed to use a map large enough to hold 1000
elements. In the next release this will be modified to be configurable
and to disable sector mapping.
At line 58 add:
PhysicalSectorMap StaticSectorMap[1000];
At line 87 change:
return (LowLevelFormat(&FlashData, 0, 0));
To:
if (LowLevelFormat(&FlashData, 0, 0) == 0)
{
MapSectors((void *) &FlashData);
return 0;
}
else
return -1;
At line 93 -
change:
case DEVCTL_WARMSTART:
MapSectors((void *) &FlashData);
to:
case DEVCTL_WARMSTART:
FlashData.SectorMap = &StaticSectorMap[0];
MapSectors((void *) &FlashData);
In drflash.h at line 16
changed:
typedef union {
byte PhysicalSectorAddr[3];
byte MustUpdateAddr[1];
} PhysicalSectorMap, *PhysicalSectorMapPtr;
to:
typedef struct {
byte PhysicalSectorAddr[3];
byte MustUpdateAddr[1];
} PhysicalSectorMap, *PhysicalSectorMapPtr;
apifrmat.c: Fixed to use hidden sectors only on a partitioned disk
At line 549
changed:
fmt.secreserved = (word) 32;
if (pgeometry->dev_geometry_lbas)
/* 10-24-2000 - New code to support lba formatting */
fmt.numhide = (unsigned long) 0; /*PS Does not work as fmt.secptrk here */
else
/* 10-24-2000 - This was the original code */
fmt.numhide = (unsigned long) fmt.secptrk;
to:
fmt.secreserved = (word) 32;
if (pdr->drive_flags & DRIVE_FLAGS_PARTITIONED)
{
if (pgeometry->dev_geometry_lbas)
/* 10-24-2000 - New code to support lba formatting */
fmt.numhide = (unsigned long) 0; /*PS Does not work as fmt.secptrk here */
else
/* 10-24-2000 - This was the original code */
fmt.numhide = (unsigned long) fmt.secptrk;
}
else
fmt.numhide = (unsigned long) 0;
rtdrobj.c - Fix problem accessing .\xxx in vfat systems change line 175 from:
if (CS_OP_CMP_ASCII(pf0,'.') && CS_OP_IS_EOS(pf1)) /* DOT */
;
to:
#if (VFAT)
if (CS_OP_CMP_ASCII(pf0,'.') && CS_OP_IS_EOS(pf1)) /* DOT */
;
#else
if (CS_OP_CMP_ASCII(pf0,'.') && CS_OP_CMP_ASCII(pf1,' ')) /* DOT-in NON-VFAT it is space filled */
;
#endif
rttdrobj.c - Fix a bug initializing the date fields for directory entries.
change lines 590 and 599 from
pc_init_inode( &lfinode, dot_str,null_str, ADIRENT|ARCHIVE,
cluster, /*size*/ 0L , &crdate);
pc_init_inode( &lfinode, dot_str, null_str, ADIRENT|ARCHIVE, cltemp,
/*size*/ 0L , &crdate);
to:
pc_init_inode( &lfinode, dot_str,null_str, ADIRENT|ARCHIVE,
cluster, /*size*/ 0L ,pc_getsysdate(&crdate));
pc_init_inode( &lfinode, dot_str, null_str, ADIRENT|ARCHIVE, cltemp,
/*size*/ 0L , pc_getsysdate(&crdate));
rttdrobj.c - Make sure cluster blocks are flushed from the buffer pool
when deleting a subdirectory
change line 689 from
if (pc_update_inode(pobj, TRUE, TRUE))
{
/* If there is no cluster chain to delete don't call freechain */
if (!cluster)
return(TRUE);
/* And clear up the space */
To:
if (pc_update_inode(pobj, TRUE, TRUE))
{
/* If there is no cluster chain to delete don't call freechain */
if (!cluster)
return(TRUE);
/* And clear up the space */
/* Make sure the blocks contained within the cluster chain
are flushed from the block buffer pool */
pc_flush_chain_blk(pdrive, cluster);
Rtfs.h Added the following prototype at line 789
void pc_flush_chain_blk(DDRIVE *pdrive, CLUSTERTYPE cluster);
rttermin.c - Fixed date print formatting
At line 152, changed:
sprintf((char *)gotoeos(p),"-%02d",80 +(statobj->fdate >> 9) & 0xff); /* Year */
to:
year = 80 +(statobj->fdate >> 9) & 0xff; /* Year */
if (year >= 100)
year -= 100;
sprintf((char *)gotoeos(p),"-%02d", year); /* Year */
====================================================================
Functional changes between in version 4.4F versus version 4.4E
Major functional changes:
apicnfig.c
Change NBLKBUFFS from 10 to 20. We are using a few more scratch buffers.
(maximum 3 at a time, so up the buffer pool size a little).
apiregrs.c
Added a test to create, reopen, and delete long file names when
VFAT is enabled.
Replace large stack arrays with allocations from the block buffer pool
Appcmdsh.c
Remove long file name test. It was moved to apiregrs.c
csstrtab.c
csstrtab.h
Added string for long file name test in apiregs.c
rtfat32.c -
Split rtfat32.c into rtfat32.c and rtfat16.c
rtfs.h -
Changed the vfat segdesc structure to contain 3 blocks, the worst case
possible. It had been 2.
rtvfat.c
Changed lfi2text to take the lfn's current length as an argument. Checks the
that the length does not exceed 255 characters.
Changed pc_findin to use scratch buffers instead of large stack byte arrays
Changed pc_deleteseglist, pc_seglist2disk and pc_seglist2text to support
long file name segments that exceed 3 blocks.
====================================================================
Functional changes between in version 4.4E versus version 4.4D
Major functional changes:
1. Fixed support for very large file and path names. This increases parse
buffer sizes substantially for JIS and UNICODE configurations so parse
buffers were moved to the DDRIVE structure and when those are not
available scratch buffers are used.
2. Support for the CD-ROM option (ASCII only) was added to ERTFS. All CD-ROM
operations are conditionally excluded at compile time.
3. Preliminary integration of FAILSAFE support was completed. All FAILSAFE
operations are conditionally excluded at compile time.
4. The pc_stat function was modified to report the root directory as a
directory. Before this fix the stat structure was initialized with
incorrect attributes.
1. rtfvat.c - in text2lfi(), there were lines of the type:
lfn = CS_OP_INC_PTR(lfn);
This causes problems with some optimizing compilers. They were changed to:
CS_OP_INC_PTR(lfn);
2. apistat.c - in pc_stat. If the path is the root, fill in the stat
structure without consulting the finode structure since the finode structure is an
abstraction
3. apideltr.c - Added a test for read only. Don't remove a directory or its
contents if it is read only.
4. The following modules were changed to support major functional
change one, supporting very long file names. Two main changes were made.
The first change eliminates use of stack buffers for temporary storage of
file and path specifications. In most cases the buffers were replaced
with special path and filename buffers contained in the drive structure.
In other cases, where the buffers in the drive structure are already in use,
scratch buffers are allocated.
rtfs.h: Added pathname_buffer and filename_buffer fields that are used instead
of stack variables by the API parsing routines.
. Modified the DSTAT structure declaration for the field lfname.
. If VFAT is enabled lfname is FILENAMESIZE_BYTES wide, if not it is 14
bytes wide.
. Added prototype for new function: int rtfs_cs_strlen_bytes(byte * string);
portconf.h: Eliminated the macros FILENAMESIZE and EMAXPATH and created
new macros named FILENAMESIZE_CHARS, FILENAMESIZE_BYTES,
EMAXPATH_CHARS, EMAXPATH_BYTES. Where FILENAMESIZE_CHARS and EMAXPATH_CHARS
are the maximum number in logical characters in the selected character
set and FILENAMESIZE_BYTES and EMAXPATH_BYTES are the number of bytes
needed to store the NULL terminated string of length FILENAMESIZE_CHARS
or EMAXPATH_CHARS.
apickdsk.c: Modified path and filename variable declarations.
apienum.c: Modified path and filename variable declarations.
Apideltr.c: Use drive's pathname_buffer and filename_buffer instead of stack
Apifilio.c: Use drive's pathname_buffer and filename_buffer instead of stack
Apifilmv.c: Use drive's pathname_buffer and filename_buffer instead of stack
APIGFRST.C: Use drive's pathname_buffer and filename_buffer instead of stack
APIMKDIR.C: Use drive's pathname_buffer and filename_buffer instead of stack
Apisetwd.c: Use drive's pathname_buffer and filename_buffer instead of stack
RTDROBJ.C: pc_findnode - Use scratch buffers instead of stack buffers
csunicod.c: pc_cs_malias - Use scratch buffers instead of stack buffers
RTNVFAT.C: pc_nibbleparse - use scratch buffers rather than stack buffers
. pc_parsepath() - Changed maximum path length test to test if the string
length in bytes is greater than the maximum character length for a path.
This works for both JIS and ASCII.
RTVFAT.C: pc_parsepath() - Changed maximum path length test to test if the logical
string in the character set is greater than the maximum character length
for a path or file.
. Modified lfi2text to accept an extra argument to allow
maximum length testing on the long file name as it is built from buffer
contents and Implemented length checking feature.
csascii.c - Created new function rtfs_cs_strlen_bytes()
csjis.c - Created new function rtfs_cs_strlen_bytes()
5. The following modules were changed to support major functional
change number two, inclusion of optional CDROM support for ERTFS.
CDROM support is optional and is completely disabled by setting
INCLUDE_CDROM to zero in PORTCONF.H.
Rtfs.h: Added prototype for new functions:
word ide_rd_data(dword register_file_address);
void ide_wr_data(dword register_file_address, word value);
Rtfsconf.h: Removed INCLUDE_CDFS macro. This is now replaced by
INCLUDE_CDROM in portconf.h
portconf.h: added INCLUDE_CDROM configuration value
apiinit.c: Added CD-ROM support, this is conditionally excluded
drideata.c: Completed CD-ROM support, this is conditionally excluded
Appcmdsh.c: Changed all instances of INCLUDE_CDFS to INCLUDE_CDROM
Appcmdsh.c: removed call to if cd_memory_init(), this is now done
in pc_ertfs_init
portio.c: Added ide_rd_data and ide_wr_data functions to read and write
the ide data register.
6. The following modules were changed to support major functional
change number 3, failsafe mode. Failsafe mode is not yet release, and
it must be left in the disabled state by setting INCLUDE_FAILSAFE_CODE
to zero in rtfsconf.h
Rtfs.h: Added ERRNO codes to support FAILSAFE operation
. Added num_free and low_water fields to the fat buffer context structure.
. Added num_free and low_water num_alloc_failures fields to the block buffer
context structure. This information will be made available to the user
through a new API call when the failsafe operating mode is release.
. If failsafe mode is enabled include failsafe header
Rtfsconf.h: Added INCLUDE_FAILSAFE_CODE macro to enable failsafe modules.
csstrtab.c and csstrtab.h: Added Failsafe strings, these are conditionally
excluded.
Appcmdsh.c: Added Failsafe test code, this is conditionally excluded
PRBLOCK.C: Modified DEBUG code to work correctly if the drive has a
private block buffer pool.
. Added code to track statistics on block usages, such as
current free and most ever used.
. Added calls to the failsafe library if failsafe is enabled.
This code is conditionally excluded.
rtdevio.c: Added calls to the failsafe library if failsafe is enabled.
This code is conditionally excluded.
RTFATXX.C: Added calls to the failsafe library if failsafe is enabled.
This code is conditionally excluded.
7. apirealt.c: pc_cluster_size - Add a call to check_drive to be sure
the mount the drive if it is not already mounted.
====================================================================
Functional changes between in version 4.4D versus version 4.4C
1. csunicode.c - Fix problem creating aliases for short file names
with invalid characters
in pc_ascii_malias() added:
/* Fill filename[8] with spaces before we start. */
rtfs_memset(filename, ' ', 8);
2. csjis.c - Fix problem creating aliases for short file names
with invalid characters
in pc_cs_malias() added:
/* Fill filename[8] with spaces before we start. */
rtfs_memset(filename, ' ', 8);
3. Fixed error validating file names an path name lengths
in rtvfat.c:pc_parsepath()
change: if (rtfs_cs_strlen(path) >= EMAXPATH)
to: if (rtfs_cs_strlen(path) >= EMAXPATH/2)
in rtvfat.c:pc_parserpath()
change: if (rtfs_cs_strlen(p) >= FILENAMESIZE)
to : if (rtfs_cs_strlen(p) >= FILENAMESIZE/2)
====================================================================
Functional changes between in version 4.4C versus version 4.4B
1. rtvfat.c - In pc_patcmp_vfat. At line 996 added the following lines:
else if (CS_OP_CMP_CHAR_NC(pp, pn))
;
this makes comparisons for vfat case independent. So HeLLo.txt matches
HELlo.txt. The files are stored exactly as they are specified but any
variation of case in the name finds the entry on a file open of directory
access.
====================================================================
Functional changes between in version 4.4B versus version 4.4A
1. rtvfat.c - Check return code of pc_malias. Set errno to PENOSPC
in pc_malias if it runs out of possible alias names.
====================================================================
Functional changes between in version 4.49b versus version 4.49
apifilio.c - po_open - If truncating the file and the chain contains
invalid clusters, thruncate the file anyway, flush the
directory entry and proceed to open the file.
apifilio.c - _po_lseek - Change the function to not detect a bad cluster
chain condition if get_chain does not advance because the
seek pointer is at EOF.
rtfatxx.c - fatxx_freechain() - return error if clnext fails
rtfatxx.c - fatxx_get_chain() - fixed bug setting return value wrong.
This was problem was introduced in version 4.46
apimkdir.c- pc_rmdir. modify error handling support to remove the
directory and chain and return FALSE if the chain contains
an invalid cluster
rtdrobj.c - pc_rmnode() - If freechain failed on an invalid cluster
proceed and flush the fat delete the directory entry
and return FALSE.
====================================================================
Functional changes between in version 4.49 versus version 4.48
rtdrobj.c - pc_mknode - Call validate_filename() inside pc_mknode()
and remove it from routines that call pc_mknode
apigfrst.c - pc_gfirst - If the search path is not a directory set errno
to PEINVALIDDIR instead of PENOENT.
apisetwd.c - pc_set_cwd - If the path is not a directory set errno
to PEINVALIDDIR instead of PEACCES.
apigfrst.c - pc_gfirst - If the search path is not a directory set errno
to PEINVALIDDIR instead of PENOENT.
rtfs.h - Changed comment about PEINVALIDDIR, checkdisk is not required.
apideltr.c - pc_deltree - change errno setting if illegal directory
condition from PEINVALIDDIR to PEINVLIDCLUSTER
rtdrobj.c, csjis.c, rtvfat.c, rtfs.h - Mofications to correctly support
valid leading kanji E5 character in first character of file.
drflsftl.c - Corrected the prototype for mtd_ProgramData ();
apiwrite.c - po_truncate Removed superfluous errno check and add validate
cluster check in case fptr_cluster is invalid.
rtdrobj.c - pc_mkchild - remove setting errno to PEINVALIDBLOCKNUMBER
because pc_firstblock set errno already to PEINVALIDCLUSTER or PEINTERNAL
rtutil.c - pc_path_to_driveno test for empty path string
apifilio.c - Added a test to catch the error condition when the file size
is incorrect, longer than the actual cluster size and the file pointer
is on the terminating cluster. When a seek to a location that should be in
the next cluster is requested this was succeding. This new fix eliminates
that result. It now returns an error and sets errno to PEINVALIDCLUSTER.
apigfrst.c - pc_gfirst/pc_gnext - Remove gnext_loop_count processing
prblocks.c - Remove memory block loop detection from pc_free_all_blk,
pc_release_blk, pc_find_blk, pc_allocate_blk,pc_flush_fat_blocks,
pc_map_fat_block, pc_find_fat_blk, pc_sort_committed_blocks
rtdrobj.c - Remove memory block loop detection from pc_scani,pc_free_all_i,
rtfatxx.c - fatxx_clgrow,fatxx_cl_truncate_dir changed maximum value for
detecting endless cluster chain from 32768L to MAX_CLUSTERS_PER_DIR
apigetcwd.c - pc_gm_name remove endless loop detection in scan for current
directory object in parent directory
rtdrobj.c - pc_rmnode remove min and max cluster to release arguments
pcmkdir.c - In pc_rmdir continue and delete a directory if it
contains a corrupted fat chain.
====================================================================
Functional changes between in version 4.48 versus version 4.47
In BOOLEAN pc_search_csl()
Bug fix, rotuine was not finding substring at the end of the string
Change
while (*set == *p)
To
while (*set && *p && (*set == *p))
Change
if (*set == ',' && *p == 0)
To
if ((*set == 0 || *set == ',') && *p == 0)
====================================================================
Functional changes between in version 4.47 versus version 4.46
pc_validate_partition_type: add (p_type == 0x0E) Windows FAT16 Partition
====================================================================
Functional changes between in version 4.46 versus version 4.45
appcmdsh.c - Added DISPLAY_ERRNO() facility
rtvfat.c - pc_malias - Clear PENOENT errno condition after verifying an
alias does not exist.
fatop_clnext() - Changed the return values. Returns 0xffffffff on end of
chain, 0x0 if an error occurs. It is considered an error if the value
pointed to by gnext is not an end of chain marker and is
less than 2 or greater than pdr->maxfindex. If so the routine returns
0 and sets errno to PEINVLIDCLUSTER.
fatxx_clgrow() - Modified routines to take advantage of new interface to
fatop_clnext(). Double checked clgrow callers for error handling.
fatxx_freechain() - Added a minimum clusters to free and maximum clusters
to free to catch problems with files who's cluster chain is either
larger or smaller than the file size says it should be.
fatxx_freechain() - Modified routines to take advantage of new interface to
fatop_clnext(). Double checked callers for error handling.
fatxx_truncate_dir() - Modified routines to take advantage of new interface to
fatop_clnext(). Added a minimum clusters to free to freechain call.
fatxx_get_chain() - Modified to use common code and error handling in
fatop_clnext. Also added and end_of_chain return value and coordinated it
with but chain protection in the other files
apichkdsk.c - Modified routines to take advantage of new interface to
fatop_clnext().
apichkdsk.c - If a file is zero sized make sure the cluster pointer in the
directory entry is set to zero.
po_open() - Modified routines to take advantage of new interface to. Set an
error file pointer and cluster chain size do not agree while truncating file
po_read - Use new return codes from fatop_get_chain() to detect when file
length is out of synch with cluster chain length. Fail if fatop_get_chain()
returns zero indicating IO or cluster range error
_po_lseek - Use new return codes from fatop_get_chain() to detect when file
length is out of synch with cluster chain length. Fail if fatop_get_chain()
returns zero indicating IO or cluster range error
pc_gnext() - Change the maximum number of calls before we think
we are in an endless loop to 0x2000000 as a maximum possible value.
thats 32768 (max number of clusters in a directory) times 64 (number of blocks in a 32 K cluster)
times 16 (maximum number of entries in a block)
po_extend_file - When scanning to the end of the current file, use range
checking and new return codes from fatop_clnext to detect when file length
is out of synch with cluster chain length. Fail if fatop_get_chain()
returns zero indicating IO or cluster range error
pc_get_file_extents - Use new return codes from fatop_get_chain() to detect
when file length is out of synch with cluster chain length. Fail if
fatop_get_chain() returns zero indicating IO or cluster range error
po_write - Use new return codes from fatop_get_chain() to detect
when file length is out of synch with cluster chain length. Fail if
fatop_get_chain() returns zero indicating IO or cluster range error
po_truncate - Use new return codes from fatop_clnext() to detect errors
in the cluster chain when seeking.
Use new interface to pc_free_chain to set an error when file length is
out of synch with cluster chain length.
pc_set_attributes - Distignuish between illegal attributes passed as argument and an attempt to change attributes from
file to a directory or directory to file. Illegal attributes set errno to PEINVALIDPARMS otherwise set PEACCESS.
====================================================================
Functional changes between in version 4.45d versus version 4.45c
4.45d is released as version 4.45
po_open - clear errno after PENOENT when doing a create
po_extend_file - Fixed range check error that was causing a leak
po_truncate - Fixed bug in calulation of clusters_to_delete
pc_regression_test() - Clean up test directory at startup with pc_deltree
Added tests for pc_deltree, po_chsize, added errno checks
rtfs.h - Added PEILLEGALERRNO for the regression test to use
====================================================================
Functional changes between in version 4.45c versus version 4.45b
pc_mkdir - clear errno before calling freechain
fatxx_freechain - Check next_cluster value before calling gnext
====================================================================
Functional changes between in version 4.45b versus version 4.45a
po_open() line 226. change:
if (pc_update_inode(pobj, TRUE, TRUE))
to
if (!pc_update_inode(pobj, TRUE, TRUE))
pc_gnext() - changed to postincrement if (++statobj->gnext_loop_count >= 32768L)
po_truncate()
change: clusters_to_release = new_chain_len - old_chain_len;
to: clusters_to_release = old_chain_len - new_chain_len;
fatxx_freechain() - call pfaxx directly to terminate, because cl_releasedir does not
set errno
====================================================================
Functional changes between in version 4.45a versus version 4.44
pc_set_attributes - sets PEINVALIDPARMS attribute argument is invalid
po_write() - Set p_errno = PEIOERRORWRITE only if devio didn't set it
pc_grow_dir() - Set errno to PENOSPC if root directory fills up
fatxx_clgrow() - Added endless loop protection and errno check
on lower level fat calls.
fatxx_clrelease_dir() - Since it is always part of cleanup in
rtdrobj.c modified code to preserve errno, since the error that
cause the cleanup call to be made is the important one.
fatxx_freechain - Add range check on the initial cluster,
added endless loop protection
added length argument from caller
po_truncate - Calulate and pass max number of clusters to freechain.
po_open - Calulate and pass max number of clusters to freechain.
pc_rmnode - Passes ass max number of clusters to freechain.
pc_deltree - Handle cases where get_inode failed but errno != PENOENT
pc_deltree - Calulate and pass max number of clusters to pc_rmnode
pc_mv - Calulate and pass max number of clusters to pc_rmnode
pc_unlink - Calulate and pass max number of clusters to pc_rmnode
rtfs.h - Added changed prototype for fatxx_freechain() and pc_rmnode
fatxx_cl_truncate_dir - Added range check on the initial cluster
fatxx_cl_truncate_dir - Added endless loop protection.
fatxx_cl_truncate_dir - Added save previous errno since we are a
cleanup function
fatxx_get_chain - removed incorrect bad cluster detect code
po_open() - test _synch_file_ptrs return code
po_read() - test _synch_file_ptrs return code
synch_file_ptrs - return TRUE/FALSE and set errno if faxx fails
po_extend_file - test _synch_file_ptrs return code
pc_gm_name - Guard against endless loop
pc_gfirst - clear a maximum loop counter for gnext
pc_gnext - Fail if > 32768 calls to gnext, infinite loop
po_extend_file - Added range check when scanning to end of file
po_truncate - added endless loop protection
pc_free_all_blk - put endless loop stop in do loop
pc_release_blk - put endless loop stop in do loop
pc_find_blk - put endless loop stop in do loop
pc_allocate_blk - endless loop stop in do loop
pc_flush_fat_blocks - put endless loop stop in do loop
pc_map_fat_block - put endless loop stop in do loop
pc_find_fat_blk - put endless loop stop in do loop
pc_sort_committed_blocks - put endless loop stop in do loop
pc_get_mom - add range check pc_finode_cluster(pdrive,pdotdot->finode)
pc_firstblock - must range check cluster values
pc_l_next_block - range check on cluster values
pc_scani - put endless loop stop
pc_free_all_i - put endless loop stop
====================================================================
Functional changes between in version 4.44 versus version 4.43
rtdrobj.c - pc_l_next_block() - Fixed error recovery code that was continueing after an
error.
csascii.c, csunicode.c and csjis.c - changed pc_malias() so that long file
names with 8 characters or less use their own name as an alias.
apimkdir.c - pc_rmdir() fixed error handling code to not overwrite lower
layers.
apimkdir.c - pc_rmdir() check retrun code when we use pc_get_inode to
scan the directory for empty. If errno not equal PENOENT tha we have a
problem.
apirealt.c - pc_get_file_extents() Fixed minor error handling problem
====================================================================
Functional changes between in version 4.43 versus version 4.42
rtvfat.c - pc_parsepath() check string lengths of path and file
rtnvfat.c - pc_parsepath() check string length of path. File is already
tested within pc_parsefile().
apigfrst.c - pc_gfirst() - set errno to 0 and return null if directory is
valid but entry not found as reported by pc_findin setting errno to PENOENT.
apigfrst.c - pc_gnext() - set errno to 0 and return null if directory is
valid but entry not found as reported by pc_get_inode setting errno to
PENOENT.
csunicode.c - changed VFAT validate_filename() to check for reserved words
csascii.c - changed VFAT validate_filename() to check for reserved words
csjis.c - changed VFAT validate_filename() to check for reserved words
csascii.c - changed NVFAT validate_filename() to check for reserved words
csjis.c - changed NVFAT validate_filename() to check for reserved words
csunicode.c - changed VFAT validate_filename() to check for reserved words
rtvfat.c - moved name_is_reserved() to rtutil.c since it is now used by
vfat and non vfat systems.
rtutil.c - moved name_is_reserved() to rtutil.c since it is now used by
vfat and non vfat systems.
csstrtab.c - USTRING_SYS_BADALIAS. USTRING_SYS_LCRESERVED_NAMES and
USTRING_SYS_UCRESERVED_NAMES are stored as 8 bit ascii. Even when using
Unicode. These strings are always looked at as strings of 8 bit data
drflsemu.c - Removed. Put simplified emulator in drflsmtd.c
drflsftl.c - Simplified interface to MTS'd removed extraneous code and
structures.
====================================================================
====================================================================
Functional changes between in version 4.42 versus version 4.41
apifilmv.c - Errno handling fix
apigfrst.c - Errno handling fix in pc_gdone
====================================================================
====================================================================
Functional changes between in version 4.41 versus version 4.4
csjistab.c - Fixed Declare tables constant
drfloppy.c - Declare fl_errors[] constant
apiwrite.c - pc_set_attributes: Fail if trying to set bits (0x80|0x40)
drfloppy.c - Declare fl_errors constant
====================================================================
Functional changes between in version 4.4 versus version 4.3.
prblock.c -
A new function named pc_free_all_fat_blocks() has been created, this
routine clears the fat cache. It is called by pc_dskfree() to release
cached fat data from a closing mount. For consistency the routine
pc_initialize_fat_block_pool now calls pc_free_all_fat_blocks() to
initialized the fat buffer pool once the configuration values have been
stored.
prblock.c - Improved error handling
apideltr.c - Improved error handling
apifilio.c - Improved error handling
apifilio.c - Modified pc_enum_file to not trigger errno when scanning all
files.
apifilmv.c - Improved error handling
apifrmat.c - Improved error handling
apigetwd.c - Improved error handling
apigfrst.c - Improved error handling
apiinfo.c - Improved error handling
apiinit.c - Don't print device driver name in autoformat loop if
STORE_DEVICE_NAMES_IN_DRIVE_STRUCT is disabled.
apimkdir.c - Improved error handling
apimkdir.c - Fixed bug in pc_rmdir() that was allowing removal of the
"." and ".." directory entries.
apirealt.c - Improved error handling
apisetwd.c - Improved error handling
apistat.c - Improved error handling
apiwrite.c - Improved error handling
csstrtab.c - Declare strings constant.
csstrtab.c - Eliminate MAP_UNICODE strings. Use the L modifier instead to
declare the text as UTF 16.
csjistab.c - Declare tables constant
rtkernfn.c - Declare med_st[] critical error table constant
rtkernfn.c - Set errno when out of resources
csunicode.c- Changed incorrect definition of BYTE_HIGH and BYTE_LOW
csunicode.c- Removed unicode_convert_strtable() call that was using malloc
csunicode.c- Fixed bug in unicode_make_printable() that caused an endless
loop
rtdevio.c - Remove check for dirty files before status check. Wasting bandwidth
rtdevio.c - Improved error handling
rtdrobj.c - Improved error handling
rtfat32.c - Improved error handling
rtfatxx.c - Improved error handling
rtfatxx.c - Fixed bug in fatxx_alloc_chain() and fatxx_clalloc() that was
not finding the last cluster.
rtfs.h - Added new errnos, changed drive_flags to a dword, added READ_ONLY
flag and note that high 8 bits are for private driver use.
rtlowl.c - Improved error handling
rtlowl.c - Add call to pc_free_all_fat_blocks() of disk close
rtnvfat.c - Improved error handling
rtvfat.c - Improved error handling
====================================================================
Functional changes between in version 4.3 versus version 4.2.
apifileio.c - Some errno handling changes have been made in po_lseek()
and po_open().
apigfrst.c - pc_gnext() has been modified to check the DSTAT arguments to
avoid a crash if the input arguments are invalid.
apimkdir.c - pc_rmdir() now checks if a subdirectory is read only before deleting.
csstrtab.c - The string table is declared as KS_CONSTANT. The file has also
been modified to allow conditional exclusion of strings. To preserve memory
you may exclude strings from the string table if the corresponding module is
not being used. Set the definition in this table to zero if you wish to
exclude strings from the from the corresponding module.
#define INCLUDE_CHKDSK_STRINGS 1
#define INCLUDE_FLDRVER_STRINGS 1
#define INCLUDE_FLASHDRV_STRINGS 1
#define INCLUDE_FLASHEMU_STRINGS 1
#define INCLUDE_RTFSINIT_STRINGS 1
#define INCLUDE_IDEDRV_STRINGS 1
#define INCLUDE_PORTMAIN_STRINGS 1
#define INCLUDE_PORTKERN_STRINGS 1
#define INCLUDE_RTFSDEM_STRINGS 1 /* For APIRGRS.C */
#define INCLUDE_TSTSH_STRINGS 1
rtdrobj.c - Added routine pc_free_all_drobj() that releases all drobj
structures associated with a drive. Also made certain the drobj->pdrive was
initialized properly imediately after all drobj allocations.
rtfs.h -
Eliminated spurious declaration: LFNRECORD s;
modified rtfs_system_user structure to include: dword rtfs_driver_errno
Added prototypes for:
void pc_free_all_drobj( DDRIVE *pdrive);
void rtfs_set_driver_errno(dword error);
dword rtfs_get_driver_errno(void);
rtkernfn.c -
Implemented two new functions
void rtfs_set_driver_errno(dword error);
dword rtfs_get_driver_errno(void);
rtlowl.c -
Started adding calls to set_errno() for failures to read BPB and FAT. These
will have no effect until the upper level calls are changed to not overwrite
these values. This work will be completed in version 4.3.
In pc_dskfree() added a call to pc_free_all_drobj() to release drobj
structures not associated with files user current working directory.
rtvfat.c - Fixed a bug in pc_parsepath() that caused problems if a path
name contained colon characters.
Many other files were changed but the changes were not substantive.
THe files were simply editted to replace C++ style comments with C
comments.
====================================================================
Functional changes between in version 4.2 versus version 4.1.
pc_gfirst/pc_gnext always updates the DSTAT->lfname field. With the
short file name if necessary
fix vfat bug causing lost files in Unicode at sector boundaries.
apicnfig.c - Minor fixes to comments
apigfrst.c - Modified pc_upstat() to put the short file name in statobj->lfname
if there is no lfn.
appcmdsh.c - Set INCLUDE_STRESS_TESTS 0 as default
prblock.c - define INCLUDE_FAILSAFE_CODE as 0, disables failsafe callbacks
make pc_commit_fat_table() and pc_sort_committed_blocks()
not static
Prfailsf.c - Removed, failsafe mode is not implemened yet.
rtfs.h - Change DSTAT structure dimensions of filename[] and pname[] fixed
rtvfat.c - Change text2lfi() and routines that call it to fix vfat bug
causing lost files in Unicode at sector boundaries.
====================================================================
Functional changes between in version 4.1 versus version 4.0.
pc_mv() - Can now move directories as well as files
Added changes to support ATA contiguous IO mode
Fixed a bug caused blocks to be freed twice on a disk abort
apifilio.c - Changed calling sequence to pc_mknode because of new argument
apifilmv.c - Modified pc_mv() to move directories as well as files.
apiinit.c - Added changes to support ATA contiguous IO mode
apimkdir.c - Changed calling sequence to pc_mknode because of new argument
drideata.c - Added changes to support ATA contiguous IO mode
portio.c - Added changes to support ATA contiguous IO mode
prblock.c - Fixed a bug that allowed blocks to be freed twice on a disk abort
rtdrobj.c - MOdified pc_mknode() so it can be used in pc_mv()
rtfs.h - Changed some prototypes to support changes to pc_mv and ATA
contiguous IO mode.
April 29
Notes:
1. Endless loop checking in chains, looks pretty easy. Looks like find_in,
fndnode are the only ones. next block already has error handling so it should
be smooth.
2. Need to change 32768 to a constant so when we decide MAX we are set
Usage by file and line number
File APIDELTR.C:
198 ret_val = pc_rmnode(pchild, 0, 32768L); MAXCLUSTERSINDIR
219 ret_val = pc_rmnode(pobj, 0, 32768L); MAXCLUSTERSINDIR
File APIMKDIR.C:
241 ret_val = pc_rmnode(pobj, 0, 32768L); MAXCLUSTERSINDIR
File APIGETWD.C:
167 if (++range_check >= 32768L) - Clusters
File APIGFRST.C:
169 Thats 32768 (max number of clusters in a directory) times
if (statobj->gnext_loop_count++ >= 0x2000000)
File RTDROBJ.C:
1084 if (++range_check >= 32768L) MAXFINODES
1182 if (++range_check >= 32768L) MAXFINODES
File PRBLOCK.C:
330 if (++range_check >= 32768L) MAXBLOCKS
337 if (++range_check >= 32768L) MAXBLOCKS
428 if (++range_check >= 32768L)MAXBLOCKS
473 if (++range_check >= 32768L)MAXBLOCKS
497 if (++range_check >= 32768L)MAXBLOCKS
585 if (++range_check >= 32768L) MAXFATBLOCKS
609 if (++range_check >= 32768L)
718 if (++range_check >= 32768L)MAXFATBLOCKS
748 if (++range_check >= 32768L)MAXFATBLOCKS
779 if (++range_check >= 32768L)MAXFATBLOCKS
904 if (++range_check >= 32768L)MAXFATBLOCKS
975 if (++range_check >= 32768L)MAXFATBLOCKS
987 if (++range_check >= 32768L)MAXFATBLOCKS
File RTFATXX.C:
321 while (nextcluster != 0xffffffff && ++range_check < 32768L) MAXCLUSTERSINDIR
330 if (range_check == 32768L) MAXCLUSTERSINDIR
518 while (nextcluster != 0xffffffff && ++range_check < 32768L)MAXCLUSTERSINDIR
530 if (!fatxx_freechain(pdr, l_cluster, 0, 32768L))MAXCLUSTERSINDIR
3. Need to solve append/lseek on file with last cluster broken.
4. Need routine to break cluster chains.
A. POSITION -
0 =='s DOSINODE
1 =='s FIRST
-1 == LAST
-2 == LAST -1
-3 == LAST -3 etc
B. OPTION
1 == INVALID 0
2 == INVALID 1
3 == INVALID >MAX
4 == LOOP ARG 1 to ARG 2
Returns: &clno, &oldvalue
3. Need regression test to test for
Cluster chain larger then file size
Cluster chain smaller then file size
Cluster chain contains 0,1, > maxfindex
Finode->cluster chain contains 0,1, > maxfindex
Cluster chain loops
BOOLEAN pc_deltree(byte *name)
int pc_enumerate( /* __apifn__ */
PCFD po_open(byte *name, word flag, word mode)
int po_read(PCFD fd, byte *buf, int count)
long po_lseek(PCFD fd, long offset, int origin)
int po_close(PCFD fd)
BOOLEAN pc_mv(byte *old_name, byte *new_name)
BOOLEAN pc_unlink(byte *name)
BOOLEAN pc_mkdir(byte *name)
BOOLEAN pc_rmdir(byte *name)
BOOLEAN pc_pwd(byte *drive, byte *path)
BOOLEAN pc_gfirst(DSTAT *statobj, byte *name)
BOOLEAN pc_gnext(DSTAT *statobj)
void pc_gdone(DSTAT *statobj)
BOOLEAN pc_set_cwd(byte *name)
BOOLEAN pc_isdir(byte *path)
BOOLEAN pc_isvol(byte *path)
BOOLEAN pc_get_attributes(byte *path, byte *p_return)
int po_write(PCFD fd, byte *buf, int count)
BOOLEAN po_truncate(PCFD fd, long offset)
BOOLEAN po_flush(PCFD fd)
BOOLEAN pc_set_attributes(byte *path, byte attributes)
long po_extend_file(PCFD fd, long n_bytes, long start_cluster, int method)
int po_chsize(PCFD fd, long offset)
int pc_get_file_extents(PCFD fd, int infolistsize, FILESEGINFO *plist, BOOLEAN raw)
int pc_get_free_list(int driveno, int listsize, FREELISTINFO *plist, long threshhold)
int pc_fstat(PCFD fd, STAT *pstat)
int pc_stat(byte *name, STAT *pstat)
#define MC_ZERO 0
#define MC_ONE 1
#define MC_MAX 2
#define MC_LOOP 3
#define MC_SET 4
#define MC_GET 5
/* manipulate_cluster_chain
Arguments:
DROBJ *pobj - Directory entry to break
int action - what action to take
MC_ZERO Set the cluster at pos_1 to 0. Ignore pos_2 argument
MC_ONE Set the cluster at pos_1 to 1. Ignore pos_2 argument
MC_MAX Set the cluster at pos_1 to > maxfindex. Ignore pos_2 argument
MC_LOOP link the cluster at pos_1 to pos_2 (create a loop)
MC_SET Put *value into the cluster
MC_GET Load *cluster and *value from the entry specified in pos_1
long pos_1 - cluster position in the chain
0 == The directory entry's cluster number
1 == The first cluster in the chain
2 == The second cluster in the chain
3 == Third.. etc
-1 == The last cluster in the chain
-2 == The last cluster in the chain -2
-3 == The last cluster in the chain -3 etc
long pos_2- cluster position in the chain to loop to if action == 4
Same arguments as pos_1 but 0 is illegal
dword *cluster - the cluster index specified by pos_1 is put into *cluster
dword *value - the value at *cluster is stored here
*/
Note: write routine to just change size field (PRO)
write routine to return return actual size of cluster size (PRO)
write routine to delete clusters beyond end of file
add flags to open
1. flush dirent when file size changes
2. flush fat when cluster allocated
manipulate_cluster_chain(DROBJ *pobj, int action,long pos_1, long pos2, dword *cluster, dword *value)
{
}
BOOLEAN populate_directory(
int dochsize(int agc, byte **agv) /*__fn__*/
{
long l;
long newsize;
dword cluster;
DROBJ *pobj;
if (agc == 2)
{
pobj = pc_fndnode(*agv);
if (pobj)
{
/* cal pc_finode_stat() to update the stat structure */
newsize = rtfs_atol( *(agv+1) );
if (newsize == 99)
{
cluster = pc_finode_cluster(pobj->pdrive,pobj->finode);
while (cluster && cluster != 0xffffffff)
{
printf("%d->", cluster);
cluster = FATOP(pobj->pdrive)->fatop_clnext(pobj->pdrive, cluster);
}
printf("\n");
pc_freeobj(pobj);
return(0);
}
cluster = pc_finode_cluster(pobj->pdrive,pobj->finode);
for (l = 1 ; l < newsize; l++)
{
cluster =
FATOP(pobj->pdrive)->fatop_clnext(pobj->pdrive, cluster);
}
if (cluster && cluster != 0xffffffff)
{
FATOP(pobj->pdrive)->fatop_pfaxx(pobj->pdrive, cluster, BADVALUE);
}
FATOP(pobj->pdrive)->fatop_flushfat(pobj->pdrive->driveno);
pc_freeobj(pobj);
}
return(0);
}
else
{
printf("CHSIZE path, # clusters\n");
return(0);
}
}
Reference in New Issue View Git Blame Copy Permalink