forked from len0rd/rockbox
fdc3668a6a
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
277 lines
8.3 KiB
C
277 lines
8.3 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2014 by Michael Sevakis
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef _DIRCACHE_REDIRECT_H_
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#include "rbpaths.h"
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#include "pathfuncs.h"
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#include "dir.h"
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#include "dircache.h"
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#if defined(HAVE_MULTIBOOT) && !defined(SIMULATOR) && !defined(BOOTLOADER)
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#include "rb-loader.h"
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#include "multiboot.h"
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#include "bootdata.h"
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#include "crc32.h"
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#endif
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#ifndef RB_ROOT_VOL_HIDDEN
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#define RB_ROOT_VOL_HIDDEN(v) (0 == 0)
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#endif
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#ifndef RB_ROOT_CONTENTS_DIR
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#define RB_ROOT_CONTENTS_DIR "/"
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#endif
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/***
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** Internal redirects that depend upon whether or not dircache is made
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**
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** Some stuff deals with it, some doesn't right now. This is a nexus point..
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**/
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/** File binding **/
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static inline void get_rootinfo_internal(struct file_base_info *infop)
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{
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#ifdef HAVE_DIRCACHE
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dircache_get_rootinfo(infop);
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#else
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(void)infop;
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#endif
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}
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static inline void fileobj_bind_file(struct file_base_binding *bindp)
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{
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#ifdef HAVE_DIRCACHE
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dircache_bind_file(bindp);
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#else
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file_binding_insert_last(bindp);
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#endif
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}
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static inline void fileobj_unbind_file(struct file_base_binding *bindp)
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{
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#ifdef HAVE_DIRCACHE
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dircache_unbind_file(bindp);
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#else
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file_binding_remove(bindp);
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#endif
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}
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/** File event handlers **/
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static inline void fileop_onopen_internal(struct filestr_base *stream,
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struct file_base_info *srcinfop,
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unsigned int callflags)
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{
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fileobj_fileop_open(stream, srcinfop, callflags);
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}
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static inline void fileop_onclose_internal(struct filestr_base *stream)
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{
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fileobj_fileop_close(stream);
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}
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static inline void fileop_oncreate_internal(struct filestr_base *stream,
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struct file_base_info *srcinfop,
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unsigned int callflags,
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struct file_base_info *dirinfop,
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const char *basename)
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{
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#ifdef HAVE_DIRCACHE
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dircache_dcfile_init(&srcinfop->dcfile);
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#endif
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fileobj_fileop_create(stream, srcinfop, callflags);
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#ifdef HAVE_DIRCACHE
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struct dirinfo_native din;
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fill_dirinfo_native(&din);
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dircache_fileop_create(dirinfop, stream->bindp, basename, &din);
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#endif
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(void)dirinfop; (void)basename;
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}
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static inline void fileop_onremove_internal(struct filestr_base *stream,
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struct file_base_info *oldinfop)
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{
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fileobj_fileop_remove(stream, oldinfop);
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#ifdef HAVE_DIRCACHE
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dircache_fileop_remove(stream->bindp);
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#endif
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}
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static inline void fileop_onrename_internal(struct filestr_base *stream,
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struct file_base_info *oldinfop,
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struct file_base_info *dirinfop,
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const char *basename)
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{
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fileobj_fileop_rename(stream, oldinfop);
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#ifdef HAVE_DIRCACHE
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dircache_fileop_rename(dirinfop, stream->bindp, basename);
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#endif
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(void)dirinfop; (void)basename;
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}
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static inline void fileop_onsync_internal(struct filestr_base *stream)
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{
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fileobj_fileop_sync(stream);
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#ifdef HAVE_DIRCACHE
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struct dirinfo_native din;
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fill_dirinfo_native(&din);
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dircache_fileop_sync(stream->bindp, &din);
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#endif
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}
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static inline void volume_onmount_internal(IF_MV_NONVOID(int volume))
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{
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#if (defined(HAVE_MULTIVOLUME) || (defined(HAVE_MULTIBOOT) && !defined(BOOTLOADER)))
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char path[VOL_MAX_LEN+2];
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#endif
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#if defined(HAVE_MULTIBOOT) && !defined(SIMULATOR) && !defined(BOOTLOADER)
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char rtpath[MAX_PATH / 2];
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make_volume_root(volume, path);
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unsigned int crc = crc_32(boot_data.payload, boot_data.length, 0xffffffff);
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if (crc > 0 && crc == boot_data.crc)
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{
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/* we need to mount the drive before we can access it */
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root_mount_path(path, 0); /* root could be different folder don't hide */
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/*BUGFIX bootloader is less selective about which drives it will mount -- revisit */
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#if defined(HAVE_MULTIDRIVE) && (NUM_VOLUMES_PER_DRIVE == 1)
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if (volume_drive(volume) == boot_data.boot_volume
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|| volume == boot_data.boot_volume)
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#else
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if (volume == boot_data.boot_volume) /* boot volume contained in uint8_t payload */
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#endif
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{
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int rtlen = get_redirect_dir(rtpath, sizeof(rtpath), volume, "", "");
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while (rtlen > 0 && rtpath[--rtlen] == PATH_SEPCH)
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rtpath[rtlen] = '\0'; /* remove extra separators */
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#if 0 /*removed, causes issues with playback for now?*/
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if (rtlen <= 0 || rtpath[rtlen] == VOL_END_TOK)
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root_unmount_volume(volume); /* unmount so root can be hidden*/
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#endif
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if (rtlen <= 0) /* Error occurred, card removed? Set root to default */
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{
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root_unmount_volume(volume); /* unmount so root can be hidden*/
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goto standard_redirect;
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}
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root_mount_path(rtpath, NSITEM_CONTENTS);
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}
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} /*CRC OK*/
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else
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{
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standard_redirect:
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root_mount_path(path, RB_ROOT_VOL_HIDDEN(volume) ? NSITEM_HIDDEN : 0);
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if (volume == path_strip_volume(RB_ROOT_CONTENTS_DIR, NULL, false))
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root_mount_path(RB_ROOT_CONTENTS_DIR, NSITEM_CONTENTS);
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}
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#elif defined(HAVE_MULTIVOLUME)
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make_volume_root(volume, path);
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root_mount_path(path, RB_ROOT_VOL_HIDDEN(volume) ? NSITEM_HIDDEN : 0);
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if (volume == path_strip_volume(RB_ROOT_CONTENTS_DIR, NULL, false))
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root_mount_path(RB_ROOT_CONTENTS_DIR, NSITEM_CONTENTS);
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#else
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const char *path = PATH_ROOTSTR;
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root_mount_path(path, RB_ROOT_VOL_HIDDEN(volume) ? NSITEM_HIDDEN : 0);
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root_mount_path(RB_ROOT_CONTENTS_DIR, NSITEM_CONTENTS);
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#endif /* HAVE_MULTIBOOT */
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#ifdef HAVE_DIRCACHE
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dircache_mount();
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#endif
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}
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static inline void volume_onunmount_internal(IF_MV_NONVOID(int volume))
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{
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#ifdef HAVE_DIRCACHE
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/* First, to avoid update of something about to be destroyed anyway */
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dircache_unmount(IF_MV(volume));
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#endif
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root_unmount_volume(IF_MV(volume));
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fileobj_mgr_unmount(IF_MV(volume));
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}
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static inline void fileop_onunmount_internal(struct filestr_base *stream)
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{
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if (stream->flags & FD_WRITE)
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force_close_writer_internal(stream); /* try to save stuff */
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else
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fileop_onclose_internal(stream); /* just readers, bye */
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}
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/** Directory reading **/
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static inline int readdir_dirent(struct filestr_base *stream,
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struct dirscan_info *scanp,
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struct DIRENT *entry)
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{
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#ifdef HAVE_DIRCACHE
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return dircache_readdir_dirent(stream, scanp, entry);
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#else
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return uncached_readdir_dirent(stream, scanp, entry);
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#endif
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}
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static inline void rewinddir_dirent(struct dirscan_info *scanp)
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{
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#ifdef HAVE_DIRCACHE
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dircache_rewinddir_dirent(scanp);
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#else
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uncached_rewinddir_dirent(scanp);
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#endif
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}
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static inline int readdir_internal(struct filestr_base *stream,
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struct file_base_info *infop,
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struct fat_direntry *fatent)
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{
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#ifdef HAVE_DIRCACHE
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return dircache_readdir_internal(stream, infop, fatent);
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#else
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return uncached_readdir_internal(stream, infop, fatent);
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#endif
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}
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static inline void rewinddir_internal(struct file_base_info *infop)
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{
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#ifdef HAVE_DIRCACHE
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dircache_rewinddir_internal(infop);
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#else
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uncached_rewinddir_internal(infop);
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#endif
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}
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/** Misc. stuff **/
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static inline struct fat_direntry *get_dir_fatent_dircache(void)
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{
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#ifdef HAVE_DIRCACHE
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return get_dir_fatent();
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#else
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return NULL;
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#endif
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}
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#endif /* _DIRCACHE_REDIRECT_H_ */
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