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When the sd card is mounted into the root namespace the database
picks up files through both paths
previously we hid the mounted drive but this causes issues with users
databases when the drive letter changes
Adds a way to keep track of volumes mounted in the root namespace
Hides the enumerated volume in root
Database:
we can just parse the root directory ('/') and get to any mounted
volume but we can also enumerate a volume in the root directory
when this occurs it leads to multiple entries since the files can
be reached through multiple paths ex, /Foo could also be /SD1/Foo
Instead we will attempt to rewrite the root with any non-hidden volumes
failing that just leave the paths alone
Change-Id: I7bdba8cfaf63902d2a3852d28484bcf8ca317ebd
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Somehow it got hooked to simulator file functions when it should
be (and was) using raw OS functions.
Credit: Frank Gevaerts
Change-Id: Iac02fed1067830a432183632a047e00dfd03d3c2
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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: http://gerrit.rockbox.org/566
Reviewed-by: Michael Sevakis <jethead71@rockbox.org>
Tested: Michael Sevakis <jethead71@rockbox.org>
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Fits better and including dir.h is more messy for some places.
Change-Id: I3ec30dcc1ac2734ad3844c903238b6cc2f4e134c
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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28929 a1c6a512-1295-4272-9138-f99709370657
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First, it add the ability to tagcache to walk through multiple search roots.
Second, it adds symlinks targets to the search roots if they're are not inside any of the current search roots, otherwise the symlink is ignored (unless it's a file).
The default search root is still /, so no search root will be actually added.
But the tagcache now isn't trapped by recursive symlinks anymore and successfully builds, and it's prepared for a future music directory setting.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28884 a1c6a512-1295-4272-9138-f99709370657
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open() and friends.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28752 a1c6a512-1295-4272-9138-f99709370657
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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28004 a1c6a512-1295-4272-9138-f99709370657
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Use host's functions for file i/o directly (open(), close() ,etc.), not the sim_* variants.
Some dir functions need to be wrapped still because we need to cache the parents dir's path (host's dirent doesn't let us know).
For the same reason (incompatibility) with host's dirent) detach some members from Rockbox' dirent struct and put it into an extra one,
the values can be retrieved via the new dir_get_info().
Get rid of the sim_ prefix for sleep as well and change the signature to unix sleep().
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27968 a1c6a512-1295-4272-9138-f99709370657
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-Move fat_dir structure out of dircache stack to RAM. Reduce dircache stack size (max level depth should stay be around 20). This should fix nano2g dircache stkov of FS#10679
-Change the structure returned by readdir_cached to match the one returned by readdir_uncached: remove useless fields to save space and avoid any potential incoherence
-Remove one field from the internal structure used by {opend,read,close}dir_cached because it was mostly redundant.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24708 a1c6a512-1295-4272-9138-f99709370657
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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18950 a1c6a512-1295-4272-9138-f99709370657
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later. We still need to hunt down snippets used that are not. 1324 modified
files...
http://www.rockbox.org/mail/archive/rockbox-dev-archive-2008-06/0060.shtml
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17847 a1c6a512-1295-4272-9138-f99709370657
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tools/creative.c, which need checking.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17369 a1c6a512-1295-4272-9138-f99709370657
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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16632 a1c6a512-1295-4272-9138-f99709370657
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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13953 a1c6a512-1295-4272-9138-f99709370657
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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13952 a1c6a512-1295-4272-9138-f99709370657
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instead of calling dircache / simulator functions (no additionnal layer added, only a cosmetic change)
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13943 a1c6a512-1295-4272-9138-f99709370657
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some tweaks. All testers have given the green light. (Now for the RED ?? ;).
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13741 a1c6a512-1295-4272-9138-f99709370657
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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12183 a1c6a512-1295-4272-9138-f99709370657
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Rockbox tagcache database engine. Only host endian support at the
moment and no command line parameters. Mainly for developers for
debugging at the moment.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11497 a1c6a512-1295-4272-9138-f99709370657
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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@6071 a1c6a512-1295-4272-9138-f99709370657
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between uisimulator files and firmware/apps files are better done.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@6031 a1c6a512-1295-4272-9138-f99709370657
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made by configure and various related adjustments. This has not yet been tested
on cygwin.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@6001 a1c6a512-1295-4272-9138-f99709370657
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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@5701 a1c6a512-1295-4272-9138-f99709370657
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useful for Ondio, internal memory + external MMC)
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@5514 a1c6a512-1295-4272-9138-f99709370657
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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4778 a1c6a512-1295-4272-9138-f99709370657
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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4521 a1c6a512-1295-4272-9138-f99709370657
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parent directory in opendir(), to be able to delete directories
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4509 a1c6a512-1295-4272-9138-f99709370657
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directory will be created automatically) or in the current directory.
New feature: A "Create directory" menu option (untested in the simulator).
Bug fix: The ON+Play menu could do nasty things if you pressed ON+Play in an empty dir.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4268 a1c6a512-1295-4272-9138-f99709370657
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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@3350 a1c6a512-1295-4272-9138-f99709370657
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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@3266 a1c6a512-1295-4272-9138-f99709370657
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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@3221 a1c6a512-1295-4272-9138-f99709370657
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