path: root/firmware/export/fat.h
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2021-07-08file/fat: rework utime function as modtime extensionJames Buren1-5/+2
This eliminates the dependence on a special struct since we were only using the modtime anyway. But it no longer fits any known standard APIs so I have converted it to our own extension instead. This can still be adapted to existing hosted APIs if the need arises. Change-Id: Ic8800698ddfd3a1a48b7cf921c0d0f865302d034
2021-07-08Fix yellow in android builds.Solomon Peachy1-1/+1
Change-Id: Ic22908e249f2db85c029e1644c9531a12ed87993
2021-07-08Fix warnings introduced in c174d3a5 (redux)Solomon Peachy1-0/+3
Change-Id: Icc871bd9875aa0d092a4fba3e8a6c3a598053854
2021-07-08Revert "Hosted & tool builds need utime.h"Solomon Peachy1-3/+0
This reverts commit a8fd590003774cb5554eaec2d5805d5e5b699fc4. Reason for revert: Inverted polarity and it didn't work anyway. Change-Id: Ife548ce4608405e3243c84a1d72090603fd2decc
2021-07-08Hosted & tool builds need utime.hSolomon Peachy1-0/+3
Should fix the warnings introduced in c174d3a5 Change-Id: Ib4bd863caef4dedf28dadab8b58b9a165ed4ef9b
2021-07-08file/fat: add utime functionJames Buren1-0/+2
This emulates the traditional utime function from UNIX clones to allow for manual updates of the modification timestamp on files and directories. This should only prove useful for non-native targets as those usually have a libc version of utime. Change-Id: Iea8a1d328e78b92c400d3354ee80689c7cf53af8
2021-07-03fat: move fattime_mktime to timefuncsJames Buren1-1/+0
This moves the time conversion function to timefuncs since it has uses on ports that don't use the FAT driver. This function has no dependency on the FAT driver as it is so this should not cause any issues. To reflect this separation the function was renamed to dostime_mktime since it is really for DOS timestamps. The places where it was used have also been updated. Change-Id: Id98b1448d5c6fcda286846e1d2c736db682bfb52
2017-03-12Do some housekeeping with fat.h and SECTOR_SIZEMichael Sevakis1-8/+0
Many includes of fat.h are pointless. Some includes are just for SECTOR_SIZE. Add a file 'firmware/include/fs_defines.h' for that and to define tuneable values that were scattered amongst various headers. Remove some local definitions of SECTOR_SIZE since they have to be in agreement with the rest of the fs code anyway. (We'll see what's in fact pointless in a moment ;) Change-Id: I9ba183bf58bd87f5c45eba7bd675c7e2c1c18ed5
2017-01-17Do some debug and preparatory work for ramcache and playlistMichael Sevakis1-1/+5
The file system rework introduced incompatibility between dircache and the tagcache ramcache and playlist dircache path caching. This update makes changes to filesystem code to reintegrate all that. It also fixes a couple bugs that were found when vetting all the code. The filestream cache was being reset without regard to the stream even if it was shared in write mode (made work of .playlist_control). Better handling of unmounting gives files a better go at force-closing them without risk to disk integrity. Did some miscellaneous pedantic changes. Improved efficiency of testing a file's existence (a little) since the path parser will be shared between file code and parsing for the sake of finding dircache references, not duplicated as before. This commit doesn't reenable said items just for the sake of keeping changes separate and related. Plan for the next is to enable dircache again for the playlists (easy peasy) and reenable tagcache ramcache but *without* the dircache path caching because it's rather substantial to change in itself. The ramcache will still function without dircache. Change-Id: I7e2a9910b866251fa8333e1275f72fcfc8425d2d
2014-08-30Rewrite filesystem code (WIP)Michael Sevakis1-90/+135
This patch redoes the filesystem code from the FAT driver up to the clipboard code in onplay.c. Not every aspect of this is finished therefore it is still "WIP". I don't wish to do too much at once (haha!). What is left to do is get dircache back in the sim and find an implementation for the dircache indicies in the tagcache and playlist code or do something else that has the same benefit. Leaving these out for now does not make anything unusable. All the basics are done. Phone app code should probably get vetted (and app path handling just plain rewritten as environment expansions); the SDL app and Android run well. Main things addressed: 1) Thread safety: There is none right now in the trunk code. Most of what currently works is luck when multiple threads are involved or multiple descriptors to the same file are open. 2) POSIX compliance: Many of the functions behave nothing like their counterparts on a host system. This leads to inconsistent code or very different behavior from native to hosted. One huge offender was rename(). Going point by point would fill a book. 3) Actual running RAM usage: Many targets will use less RAM and less stack space (some more RAM because I upped the number of cache buffers for large memory). There's very little memory lying fallow in rarely-used areas (see 'Key core changes' below). Also, all targets may open the same number of directory streams whereas before those with less than 8MB RAM were limited to 8, not 12 implying those targets will save slightly less. 4) Performance: The test_disk plugin shows markedly improved performance, particularly in the area of (uncached) directory scanning, due partly to more optimal directory reading and to a better sector cache algorithm. Uncached times tend to be better while there is a bit of a slowdown in dircache due to it being a bit heavier of an implementation. It's not noticeable by a human as far as I can say. Key core changes: 1) Files and directories share core code and data structures. 2) The filesystem code knows which descriptors refer to same file. This ensures that changes from one stream are appropriately reflected in every open descriptor for that file (fileobj_mgr.c). 3) File and directory cache buffers are borrowed from the main sector cache. This means that when they are not in use by a file, they are not wasted, but used for the cache. Most of the time, only a few of them are needed. It also means that adding more file and directory handles is less expensive. All one must do in ensure a large enough cache to borrow from. 4) Relative path components are supported and the namespace is unified. It does not support full relative paths to an implied current directory; what is does support is use of "." and "..". Adding the former would not be very difficult. The namespace is unified in the sense that volumes may be specified several times along with relative parts, e.g.: "/<0>/foo/../../<1>/bar" :<=> "/<1>/bar". 5) Stack usage is down due to sharing of data, static allocation and less duplication of strings on the stack. This requires more serialization than I would like but since the number of threads is limited to a low number, the tradoff in favor of the stack seems reasonable. 6) Separates and heirarchicalizes (sic) the SIM and APP filesystem code. SIM path and volume handling is just like the target. Some aspects of the APP file code get more straightforward (e.g. no path hashing is needed). Dircache: Deserves its own section. Dircache is new but pays homage to the old. The old one was not compatible and so it, since it got redone, does all the stuff it always should have done such as: 1) It may be update and used at any time during the build process. No longer has one to wait for it to finish building to do basic file management (create, remove, rename, etc.). 2) It does not need to be either fully scanned or completely disabled; it can be incomplete (i.e. overfilled, missing paths), still be of benefit and be correct. 3) Handles mounting and dismounting of individual volumes which means a full rebuild is not needed just because you pop a new SD card in the slot. Now, because it reuses its freed entry data, may rebuild only that volume. 4) Much more fundamental to the file code. When it is built, it is the keeper of the master file list whether enabled or not ("disabled" is just a state of the cache). Its must always to ready to be started and bind all streams opened prior to being enabled. 5) Maintains any short filenames in OEM format which means that it does not need to be rebuilt when changing the default codepage. Miscellaneous Compatibility: 1) Update any other code that would otherwise not work such as the hotswap mounting code in various card drivers. 2) File management: Clipboard needed updating because of the behavioral changes. Still needs a little more work on some finer points. 3) Remove now-obsolete functionality such as the mutex's "no preempt" flag (which was only for the prior FAT driver). 4) struct dirinfo uses time_t rather than raw FAT directory entry time fields. I plan to follow up on genericizing everything there (i.e. no FAT attributes). 5) unicode.c needed some redoing so that the file code does not try try to load codepages during a scan, which is actually a problem with the current code. The default codepage, if any is required, is now kept in RAM separarately (bufalloced) from codepages specified to iso_decode() (which must not be bufalloced because the conversion may be done by playback threads). Brings with it some additional reusable core code: 1) Revised file functions: Reusable code that does things such as safe path concatenation and parsing without buffer limitations or data duplication. Variants that copy or alter the input path may be based off these. To do: 1) Put dircache functionality back in the sim. Treating it internally as a different kind of file system seems the best approach at this time. 2) Restore use of dircache indexes in the playlist and database or something effectively the same. Since the cache doesn't have to be complete in order to be used, not getting a hit on the cache doesn't unambiguously say if the path exists or not. Change-Id: Ia30f3082a136253e3a0eae0784e3091d138915c8 Reviewed-on: Reviewed-by: Michael Sevakis <> Tested: Michael Sevakis <>
2013-08-17Cleanup MV/MD macros a little.Michael Sevakis1-4/+4
When using variadic macros there's no need for IF_MD2/IF_MV2 to deal with function parameters. IF_MD/IF_MV are enough. Throw in IF_MD_DRV/ID_MV_VOL that return the parameter if MD/MV, or 0 if not. Change-Id: I7605e6039f3be19cb47110c84dcb3c5516f2c3eb
2011-02-27iPod Classic CE-ATA Support (Part 2 of 4: Remove on-stack sector buffers, ↵Michael Sparmann1-0/+2
and replace them with a single statically allocated sector buffer that's arbitrated amongst users) git-svn-id: svn:// a1c6a512-1295-4272-9138-f99709370657
2011-02-27iPod Classic CE-ATA Support (Part 1 of 4: Cacheline align some statically ↵Michael Sparmann1-2/+3
allocated sector buffers) git-svn-id: svn:// a1c6a512-1295-4272-9138-f99709370657
2011-01-02Autodetect sector size on superfloppy volumes based on the FAT32 BPB (kudos ↵Michael Sparmann1-0/+1
to Frank Gevaerts) git-svn-id: svn:// a1c6a512-1295-4272-9138-f99709370657
2010-03-22FS#11118: reduce the number of cached sector in FAT code because some are ↵Amaury Pouly1-1/+6
useless after a rewrite of LFN entries handling. Also makes LFN handling more robust. git-svn-id: svn:// a1c6a512-1295-4272-9138-f99709370657
2010-02-14Rewrite dircache generation to take advantage for the FAT code. Reduce RAM ↵Amaury Pouly1-1/+1
usage by ~30Kb and binsize by at least several hundreds bytes. Also remove the directory depth limit of dircache. git-svn-id: svn:// a1c6a512-1295-4272-9138-f99709370657
2009-10-02Patch #1 from FS#10633 (Nano 2G developments) by Michael Sparmann - Allows ↵Dave Chapman1-0/+4
targets to set a different sector size than 512 for the storage system. Should not affect any other target. git-svn-id: svn:// a1c6a512-1295-4272-9138-f99709370657
2009-07-17Commit FS#9545, storage cleanup and multi-driver supportFrank Gevaerts1-1/+1
git-svn-id: svn:// a1c6a512-1295-4272-9138-f99709370657
2008-11-01Apply FS#9500. This adds a storage_*() abstraction to replace ata_*(). To do ↵Frank Gevaerts1-1/+1
that, it also introduces sd_*, nand_*, and mmc_*. This should be a good first step to allow multi-driver targets, like the Elio (ATA/SD), or the D2 (NAND/SD). git-svn-id: svn:// a1c6a512-1295-4272-9138-f99709370657
2008-06-28Updated our source code header to explicitly mention that we are GPL v2 orDaniel Stenberg1-2/+4
later. We still need to hunt down snippets used that are not. 1324 modified files... git-svn-id: svn:// a1c6a512-1295-4272-9138-f99709370657
2008-03-12Do some crackdown on kernel object reinitialization after they could be in ↵Michael Sevakis1-0/+4
use and use before initialization. For c200/e200: Be sure fat cache and ata locks are acquired in the proper order during hot swapping. Delay hotswap monitoring until after initial file mounting (address 2nd kobj concern + possible call of fat driver before init). git-svn-id: svn:// a1c6a512-1295-4272-9138-f99709370657
2007-02-25Remove unused code, make comments c-style, make one private function staticNils Wallménius1-4/+5
git-svn-id: svn:// a1c6a512-1295-4272-9138-f99709370657
2007-01-29Reverting the FAT32 driver change - it seems to have introduced a bugLinus Nielsen Feltzing1-7/+1
git-svn-id: svn:// a1c6a512-1295-4272-9138-f99709370657
2007-01-29Changed fat_getnext():Linus Nielsen Feltzing1-1/+7
1) Fixed a bug where really long filenames could be messed up if they spanned 3 sectors 2) Now uses 2 buffers instead of 3, without copying the buffers with memcpy() 3) Can now use aligned sector reads, first step towards iPod 5.5G 80GB git-svn-id: svn:// a1c6a512-1295-4272-9138-f99709370657
2006-12-04Much simpler implementation of large virtual sector support, not needing ↵Jens Arnold1-10/+2
larger sector buffers and not touching file.c at all. secmult is simply used to normalize all sector counts to 512-byte physical sectors. * Moved MAX_SECTOR_SIZE definition to config-*.h, and enabled it for iPod Video only. MAX_SECTOR_SIZE now only enables checking for alternate disk layouts due to sector size (as iPod Video G5.5 is presented as having 2048-byte _physical_ sectors to the PC). Large virtual sector support in fat.c is always enabled. git-svn-id: svn:// a1c6a512-1295-4272-9138-f99709370657
2006-12-03Add support (runtime detection) for 2048 bytes/sector filesystem.Miika Pekkarinen1-2/+11
Large sectors are enabled for iPod Video (including 5.5G) only. Might still cause FS corruption (however, unlikely), so beware! Based on FS#6169 by Robert Carboneau. git-svn-id: svn:// a1c6a512-1295-4272-9138-f99709370657
2006-07-31Applied FS# 5736 by Alexander Levin.Rani Hod1-1/+9
Fixed fat buffer overflow with LFNs longer than 255 bytes. git-svn-id: svn:// a1c6a512-1295-4272-9138-f99709370657
2005-02-26long policyJean-Philippe Bernardy1-2/+2
git-svn-id: svn:// a1c6a512-1295-4272-9138-f99709370657
2005-02-25more long policyJean-Philippe Bernardy1-1/+1
git-svn-id: svn:// a1c6a512-1295-4272-9138-f99709370657
2005-01-23int -> long where neededJean-Philippe Bernardy1-17/+17
git-svn-id: svn:// a1c6a512-1295-4272-9138-f99709370657
2005-01-05unmount function in preparation for MMC hotswap, more mutexingJörg Hohensohn1-0/+1
git-svn-id: svn:// a1c6a512-1295-4272-9138-f99709370657
2005-01-03Correct handling of FAT16 root directory when it does not start on a pseudo ↵Jens Arnold1-4/+4
cluster boundary. Fixed some places where the cluster number can become negative. Significant code cleanup. git-svn-id: svn:// a1c6a512-1295-4272-9138-f99709370657
2004-12-28prepared to mount multiple partitions into one logical file system (most ↵Jörg Hohensohn1-7/+16
useful for Ondio, internal memory + external MMC) git-svn-id: svn:// a1c6a512-1295-4272-9138-f99709370657
2004-08-22Bug fix: renaming a directory could cause a name clash. New feature: ↵Linus Nielsen Feltzing1-0/+1
rename() can now move files/directories as well. git-svn-id: svn:// a1c6a512-1295-4272-9138-f99709370657
2004-08-17 Const policed pointer arguments to functions, part 2Jens Arnold1-6/+6
git-svn-id: svn:// a1c6a512-1295-4272-9138-f99709370657
2004-04-16New function: rmdir(). Also some changes in the fat code, to track the ↵Linus Nielsen Feltzing1-1/+2
parent directory in opendir(), to be able to delete directories git-svn-id: svn:// a1c6a512-1295-4272-9138-f99709370657
2004-04-06Added cluster size to the disk debug screenLinus Nielsen Feltzing1-0/+1
git-svn-id: svn:// a1c6a512-1295-4272-9138-f99709370657
2004-01-15Implemented the mkdir() function in the FAT32 driverLinus Nielsen Feltzing1-2/+3
git-svn-id: svn:// a1c6a512-1295-4272-9138-f99709370657
2003-06-03Small seek optimization -- begin seek at last read cluster if possibleHardeep Sidhu1-0/+1
git-svn-id: svn:// a1c6a512-1295-4272-9138-f99709370657
2003-02-07Move publicly (from apps) accessed files from drivers/ to export/.Daniel Stenberg1-0/+96
git-svn-id: svn:// a1c6a512-1295-4272-9138-f99709370657