/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Copyright (C) 2005 by Miika Pekkarinen * * All files in this archive are subject to the GNU General Public License. * See the file COPYING in the source tree root for full license agreement. * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ****************************************************************************/ /* TODO: - Allow cache live updating while transparent rebuild is running. */ #include "config.h" #include #include #include #include #include "debug.h" #include "atoi.h" #include "system.h" #include "logf.h" #include "dircache.h" #include "thread.h" #include "kernel.h" #include "usb.h" #include "file.h" #include "buffer.h" #include "dir.h" #if CONFIG_RTC #include "time.h" #include "timefuncs.h" #endif /* Queue commands. */ #define DIRCACHE_BUILD 1 #define DIRCACHE_STOP 2 #define MAX_OPEN_DIRS 8 DIR_CACHED opendirs[MAX_OPEN_DIRS]; static struct dircache_entry *fd_bindings[MAX_OPEN_FILES]; static struct dircache_entry *dircache_root; #ifdef HAVE_MULTIVOLUME static struct dircache_entry *append_position; #endif static bool dircache_initialized = false; static bool dircache_initializing = false; static bool thread_enabled = false; static unsigned long allocated_size = DIRCACHE_LIMIT; static unsigned long dircache_size = 0; static unsigned long entry_count = 0; static unsigned long reserve_used = 0; static unsigned int cache_build_ticks = 0; static unsigned long appflags = 0; static char dircache_cur_path[MAX_PATH*2]; static struct event_queue dircache_queue; static long dircache_stack[(DEFAULT_STACK_SIZE + 0x900)/sizeof(long)]; static const char dircache_thread_name[] = "dircache"; static struct fdbind_queue fdbind_cache[MAX_PENDING_BINDINGS]; static int fdbind_idx = 0; /* --- Internal cache structure control functions --- */ /** * Internal function to allocate a new dircache_entry from memory. */ static struct dircache_entry* allocate_entry(void) { struct dircache_entry *next_entry; if (dircache_size > allocated_size - MAX_PATH*2) { logf("size limit reached"); return NULL; } next_entry = (struct dircache_entry *)((char *)dircache_root+dircache_size); #ifdef ROCKBOX_STRICT_ALIGN /* Make sure the entry is long aligned. */ if ((long)next_entry & 0x03) { dircache_size += 4 - ((long)next_entry & 0x03); next_entry = (struct dircache_entry *)(((long)next_entry & ~0x03) + 0x04); } #endif next_entry->name_len = 0; next_entry->d_name = NULL; next_entry->up = NULL; next_entry->down = NULL; next_entry->next = NULL; dircache_size += sizeof(struct dircache_entry); return next_entry; } /** * Internal function to allocate a dircache_entry and set * ->next entry pointers. */ static struct dircache_entry* dircache_gen_next(struct dircache_entry *ce) { struct dircache_entry *next_entry; if ( (next_entry = allocate_entry()) == NULL) return NULL; next_entry->up = ce->up; ce->next = next_entry; return next_entry; } /* * Internal function to allocate a dircache_entry and set * ->down entry pointers. */ static struct dircache_entry* dircache_gen_down(struct dircache_entry *ce) { struct dircache_entry *next_entry; if ( (next_entry = allocate_entry()) == NULL) return NULL; next_entry->up = ce; ce->down = next_entry; return next_entry; } /* This will eat ~30 KiB of memory! * We should probably use that as additional reserve buffer in future. */ #define MAX_SCAN_DEPTH 16 static struct travel_data dir_recursion[MAX_SCAN_DEPTH]; /** * Returns true if there is an event waiting in the queue * that requires the current operation to be aborted. */ static bool check_event_queue(void) { struct queue_event ev; queue_wait_w_tmo(&dircache_queue, &ev, 0); switch (ev.id) { case DIRCACHE_STOP: case SYS_USB_CONNECTED: #ifdef HAVE_HOTSWAP case SYS_FS_CHANGED: #endif /* Put the event back into the queue. */ queue_post(&dircache_queue, ev.id, ev.data); return true; } return false; } /** * Internal function to iterate a path. */ static int dircache_scan(IF_MV2(int volume,) struct travel_data *td) { #ifdef SIMULATOR while ( ( td->entry = readdir_uncached(td->dir) ) ) #else while ( (fat_getnext(td->dir, &td->entry) >= 0) && (td->entry.name[0])) #endif { #ifdef SIMULATOR if (!strcmp(".", td->entry->d_name) || !strcmp("..", td->entry->d_name)) { continue; } td->ce->attribute = td->entry->attribute; td->ce->name_len = strlen(td->entry->d_name) + 1; td->ce->d_name = ((char *)dircache_root+dircache_size); td->ce->size = td->entry->size; td->ce->wrtdate = td->entry->wrtdate; td->ce->wrttime = td->entry->wrttime; memcpy(td->ce->d_name, td->entry->d_name, td->ce->name_len); #else if (!strcmp(".", td->entry.name) || !strcmp("..", td->entry.name)) { continue; } td->ce->attribute = td->entry.attr; td->ce->name_len = strlen(td->entry.name) + 1; td->ce->d_name = ((char *)dircache_root+dircache_size); td->ce->startcluster = td->entry.firstcluster; td->ce->size = td->entry.filesize; td->ce->wrtdate = td->entry.wrtdate; td->ce->wrttime = td->entry.wrttime; memcpy(td->ce->d_name, td->entry.name, td->ce->name_len); #endif dircache_size += td->ce->name_len; entry_count++; #ifdef SIMULATOR if (td->entry->attribute & ATTR_DIRECTORY) #else if (td->entry.attr & FAT_ATTR_DIRECTORY) #endif { td->down_entry = dircache_gen_down(td->ce); if (td->down_entry == NULL) return -2; td->pathpos = strlen(dircache_cur_path); strncpy(&dircache_cur_path[td->pathpos], "/", sizeof(dircache_cur_path) - td->pathpos - 1); #ifdef SIMULATOR strncpy(&dircache_cur_path[td->pathpos+1], td->entry->d_name, sizeof(dircache_cur_path) - td->pathpos - 2); td->newdir = opendir_uncached(dircache_cur_path); if (td->newdir == NULL) { logf("Failed to opendir_uncached(): %s", dircache_cur_path); return -3; } #else strncpy(&dircache_cur_path[td->pathpos+1], td->entry.name, sizeof(dircache_cur_path) - td->pathpos - 2); td->newdir = *td->dir; if (fat_opendir(IF_MV2(volume,) &td->newdir, td->entry.firstcluster, td->dir) < 0 ) { return -3; } #endif td->ce = dircache_gen_next(td->ce); if (td->ce == NULL) return -4; return 1; } td->ce->down = NULL; td->ce = dircache_gen_next(td->ce); if (td->ce == NULL) return -5; /* When simulator is used, it's only safe to yield here. */ if (thread_enabled) { /* Stop if we got an external signal. */ if (check_event_queue()) return -6; yield(); } } return 0; } /** * Recursively scan the hard disk and build the cache. */ #ifdef SIMULATOR static int dircache_travel(IF_MV2(int volume,) DIR_UNCACHED *dir, struct dircache_entry *ce) #else static int dircache_travel(IF_MV2(int volume,) struct fat_dir *dir, struct dircache_entry *ce) #endif { int depth = 0; int result; memset(ce, 0, sizeof(struct dircache_entry)); #if defined(HAVE_MULTIVOLUME) && !defined(SIMULATOR) if (volume > 0) { ce->d_name = ((char *)dircache_root+dircache_size); snprintf(ce->d_name, VOL_ENUM_POS + 3, VOL_NAMES, volume); ce->name_len = VOL_ENUM_POS + 3; dircache_size += ce->name_len; ce->attribute = FAT_ATTR_DIRECTORY | FAT_ATTR_VOLUME; ce->size = 0; append_position = dircache_gen_next(ce); ce = dircache_gen_down(ce); } #endif dir_recursion[0].dir = dir; dir_recursion[0].ce = ce; dir_recursion[0].first = ce; do { //logf("=> %s", dircache_cur_path); result = dircache_scan(IF_MV2(volume,) &dir_recursion[depth]); switch (result) { case 0: /* Leaving the current directory. */ /* Add the standard . and .. entries. */ ce = dir_recursion[depth].ce; ce->d_name = "."; ce->name_len = 2; #ifdef SIMULATOR closedir_uncached(dir_recursion[depth].dir); ce->attribute = ATTR_DIRECTORY; #else ce->attribute = FAT_ATTR_DIRECTORY; ce->startcluster = dir_recursion[depth].dir->file.firstcluster; #endif ce->size = 0; ce->down = dir_recursion[depth].first; depth--; if (depth < 0) break ; dircache_cur_path[dir_recursion[depth].pathpos] = '\0'; ce = dircache_gen_next(ce); if (ce == NULL) { logf("memory allocation error"); return -3; } #ifdef SIMULATOR ce->attribute = ATTR_DIRECTORY; #else ce->attribute = FAT_ATTR_DIRECTORY; ce->startcluster = dir_recursion[depth].dir->file.firstcluster; #endif ce->d_name = ".."; ce->name_len = 3; ce->size = 0; ce->down = dir_recursion[depth].first; break ; case 1: /* Going down in the directory tree. */ depth++; if (depth >= MAX_SCAN_DEPTH) { logf("Too deep directory structure"); return -2; } #ifdef SIMULATOR dir_recursion[depth].dir = dir_recursion[depth-1].newdir; #else dir_recursion[depth].dir = &dir_recursion[depth-1].newdir; #endif dir_recursion[depth].first = dir_recursion[depth-1].down_entry; dir_recursion[depth].ce = dir_recursion[depth-1].down_entry; break ; default: logf("Scan failed"); logf("-> %s", dircache_cur_path); return -1; } } while (depth >= 0) ; return 0; } /** * Internal function to get a pointer to dircache_entry for a given filename. * path: Absolute path to a file or directory. * get_before: Returns the cache pointer before the last valid entry found. * only_directories: Match only filenames which are a directory type. */ static struct dircache_entry* dircache_get_entry(const char *path, bool get_before, bool only_directories) { struct dircache_entry *cache_entry, *before; char namecopy[MAX_PATH*2]; char* part; char* end; strncpy(namecopy, path, sizeof(namecopy) - 1); cache_entry = dircache_root; before = NULL; for ( part = strtok_r(namecopy, "/", &end); part; part = strtok_r(NULL, "/", &end)) { /* scan dir for name */ while (1) { if (cache_entry == NULL) { return NULL; } else if (cache_entry->name_len == 0) { cache_entry = cache_entry->next; continue ; } if (!strcasecmp(part, cache_entry->d_name)) { before = cache_entry; if (cache_entry->down || only_directories) cache_entry = cache_entry->down; break ; } cache_entry = cache_entry->next; } } if (get_before) cache_entry = before; return cache_entry; } #ifdef HAVE_EEPROM_SETTINGS /** * Function to load the internal cache structure from disk to initialize * the dircache really fast and little disk access. */ int dircache_load(void) { struct dircache_maindata maindata; int bytes_read; int fd; if (dircache_initialized) return -1; logf("Loading directory cache"); dircache_size = 0; fd = open(DIRCACHE_FILE, O_RDONLY); if (fd < 0) return -2; bytes_read = read(fd, &maindata, sizeof(struct dircache_maindata)); if (bytes_read != sizeof(struct dircache_maindata) || maindata.size <= 0) { logf("Dircache file header error"); close(fd); remove(DIRCACHE_FILE); return -3; } dircache_root = buffer_alloc(0); if ((long)maindata.root_entry != (long)dircache_root) { logf("Position missmatch"); close(fd); remove(DIRCACHE_FILE); return -4; } dircache_root = buffer_alloc(maindata.size + DIRCACHE_RESERVE); entry_count = maindata.entry_count; appflags = maindata.appflags; bytes_read = read(fd, dircache_root, MIN(DIRCACHE_LIMIT, maindata.size)); close(fd); remove(DIRCACHE_FILE); if (bytes_read != maindata.size) { logf("Dircache read failed"); return -6; } /* Cache successfully loaded. */ dircache_size = maindata.size; allocated_size = dircache_size + DIRCACHE_RESERVE; reserve_used = 0; logf("Done, %ld KiB used", dircache_size / 1024); dircache_initialized = true; memset(fd_bindings, 0, sizeof(fd_bindings)); return 0; } /** * Function to save the internal cache stucture to disk for fast loading * on boot. */ int dircache_save(void) { struct dircache_maindata maindata; int fd; unsigned long bytes_written; remove(DIRCACHE_FILE); if (!dircache_initialized) return -1; logf("Saving directory cache"); fd = open(DIRCACHE_FILE, O_WRONLY | O_CREAT | O_TRUNC); maindata.magic = DIRCACHE_MAGIC; maindata.size = dircache_size; maindata.root_entry = dircache_root; maindata.entry_count = entry_count; maindata.appflags = appflags; /* Save the info structure */ bytes_written = write(fd, &maindata, sizeof(struct dircache_maindata)); if (bytes_written != sizeof(struct dircache_maindata)) { close(fd); logf("dircache: write failed #1"); return -2; } /* Dump whole directory cache to disk */ bytes_written = write(fd, dircache_root, dircache_size); close(fd); if (bytes_written != dircache_size) { logf("dircache: write failed #2"); return -3; } return 0; } #endif /* #if 0 */ /** * Internal function which scans the disk and creates the dircache structure. */ static int dircache_do_rebuild(void) { #ifdef SIMULATOR DIR_UNCACHED *pdir; #else struct fat_dir dir, *pdir; #endif unsigned int start_tick; int i; /* Measure how long it takes build the cache. */ start_tick = current_tick; dircache_initializing = true; appflags = 0; entry_count = 0; memset(dircache_cur_path, 0, sizeof(dircache_cur_path)); dircache_size = sizeof(struct dircache_entry); #ifdef HAVE_MULTIVOLUME append_position = dircache_root; for (i = NUM_VOLUMES; i >= 0; i--) { if (fat_ismounted(i)) { #endif #ifdef SIMULATOR pdir = opendir_uncached("/"); if (pdir == NULL) { logf("Failed to open rootdir"); dircache_initializing = false; return -3; } #else #ifdef HAVE_MULTIVOLUME if ( fat_opendir(IF_MV2(i,) &dir, 0, NULL) < 0 ) { #else if ( fat_opendir(IF_MV2(0,) &dir, 0, NULL) < 0 ) { #endif /* HAVE_MULTIVOLUME */ logf("Failed opening root dir"); dircache_initializing = false; return -3; } pdir = &dir; #endif cpu_boost(true); #ifdef HAVE_MULTIVOLUME if (dircache_travel(IF_MV2(i,) pdir, append_position) < 0) #else if (dircache_travel(IF_MV2(0,) pdir, dircache_root) < 0) #endif /* HAVE_MULTIVOLUME */ { logf("dircache_travel failed"); cpu_boost(false); dircache_size = 0; dircache_initializing = false; return -2; } cpu_boost(false); #ifdef HAVE_MULTIVOLUME } } #endif logf("Done, %ld KiB used", dircache_size / 1024); dircache_initialized = true; dircache_initializing = false; cache_build_ticks = current_tick - start_tick; /* Initialized fd bindings. */ memset(fd_bindings, 0, sizeof(fd_bindings)); for (i = 0; i < fdbind_idx; i++) dircache_bind(fdbind_cache[i].fd, fdbind_cache[i].path); fdbind_idx = 0; if (thread_enabled) { if (allocated_size - dircache_size < DIRCACHE_RESERVE) reserve_used = DIRCACHE_RESERVE - (allocated_size - dircache_size); } else { /* We have to long align the audiobuf to keep the buffer access fast. */ audiobuf += (long)((dircache_size & ~0x03) + 0x04); audiobuf += DIRCACHE_RESERVE; allocated_size = dircache_size + DIRCACHE_RESERVE; reserve_used = 0; } return 1; } /** * Internal thread that controls transparent cache building. */ static void dircache_thread(void) { struct queue_event ev; while (1) { queue_wait(&dircache_queue, &ev); switch (ev.id) { #ifdef HAVE_HOTSWAP case SYS_FS_CHANGED: if (!dircache_initialized) break; dircache_initialized = false; #endif case DIRCACHE_BUILD: thread_enabled = true; dircache_do_rebuild(); thread_enabled = false; break ; case DIRCACHE_STOP: logf("Stopped the rebuilding."); dircache_initialized = false; break ; #ifndef SIMULATOR case SYS_USB_CONNECTED: usb_acknowledge(SYS_USB_CONNECTED_ACK); usb_wait_for_disconnect(&dircache_queue); break ; #endif } } } /** * Start scanning the disk to build the dircache. * Either transparent or non-transparent build method is used. */ int dircache_build(int last_size) { if (dircache_initialized || thread_enabled) return -3; logf("Building directory cache"); remove(DIRCACHE_FILE); /* Background build, dircache has been previously allocated */ if (dircache_size > 0) { thread_enabled = true; dircache_initializing = true; queue_post(&dircache_queue, DIRCACHE_BUILD, 0); return 2; } if (last_size > DIRCACHE_RESERVE && last_size < DIRCACHE_LIMIT ) { allocated_size = last_size + DIRCACHE_RESERVE; dircache_root = buffer_alloc(allocated_size); thread_enabled = true; /* Start a transparent rebuild. */ queue_post(&dircache_queue, DIRCACHE_BUILD, 0); return 3; } dircache_root = (struct dircache_entry *)(((long)audiobuf & ~0x03) + 0x04); /* Start a non-transparent rebuild. */ return dircache_do_rebuild(); } /** * Steal the allocated dircache buffer and disable dircache. */ void* dircache_steal_buffer(long *size) { dircache_disable(); if (dircache_size == 0) { *size = 0; return NULL; } *size = dircache_size + (DIRCACHE_RESERVE-reserve_used); return dircache_root; } /** * Main initialization function that must be called before any other * operations within the dircache. */ void dircache_init(void) { int i; dircache_initialized = false; dircache_initializing = false; memset(opendirs, 0, sizeof(opendirs)); for (i = 0; i < MAX_OPEN_DIRS; i++) { opendirs[i].secondary_entry.d_name = buffer_alloc(MAX_PATH); } queue_init(&dircache_queue, true); create_thread(dircache_thread, dircache_stack, sizeof(dircache_stack), 0, dircache_thread_name IF_PRIO(, PRIORITY_BACKGROUND) IF_COP(, CPU)); } /** * Returns true if dircache has been initialized and is ready to be used. */ bool dircache_is_enabled(void) { return dircache_initialized; } /** * Returns true if dircache is being initialized. */ bool dircache_is_initializing(void) { return dircache_initializing || thread_enabled; } /** * Set application flags used to determine if dircache is still intact. */ void dircache_set_appflag(long mask) { appflags |= mask; } /** * Get application flags used to determine if dircache is still intact. */ bool dircache_get_appflag(long mask) { return dircache_is_enabled() && (appflags & mask); } /** * Returns the current number of entries (directories and files) in the cache. */ int dircache_get_entry_count(void) { return entry_count; } /** * Returns the allocated space for dircache (without reserve space). */ int dircache_get_cache_size(void) { return dircache_is_enabled() ? dircache_size : 0; } /** * Returns how many bytes of the reserve allocation for live cache * updates have been used. */ int dircache_get_reserve_used(void) { return dircache_is_enabled() ? reserve_used : 0; } /** * Returns the time in kernel ticks that took to build the cache. */ int dircache_get_build_ticks(void) { return dircache_is_enabled() ? cache_build_ticks : 0; } /** * Disables the dircache. Usually called on shutdown or when * accepting a usb connection. */ void dircache_disable(void) { int i; bool cache_in_use; if (thread_enabled) queue_post(&dircache_queue, DIRCACHE_STOP, 0); while (thread_enabled) sleep(1); dircache_initialized = false; logf("Waiting for cached dirs to release"); do { cache_in_use = false; for (i = 0; i < MAX_OPEN_DIRS; i++) { if (!opendirs[i].regulardir && opendirs[i].busy) { cache_in_use = true; sleep(1); break ; } } } while (cache_in_use) ; logf("Cache released"); entry_count = 0; } /** * Usermode function to return dircache_entry pointer to the given path. */ const struct dircache_entry *dircache_get_entry_ptr(const char *filename) { if (!dircache_initialized || filename == NULL) return NULL; return dircache_get_entry(filename, false, false); } /** * Function to copy the full absolute path from dircache to the given buffer * using the given dircache_entry pointer. */ void dircache_copy_path(const struct dircache_entry *entry, char *buf, int size) { const struct dircache_entry *down[MAX_SCAN_DEPTH]; int depth = 0; if (size <= 0) return ; buf[0] = '\0'; if (entry == NULL) return ; do { down[depth] = entry; entry = entry->up; depth++; } while (entry != NULL && depth < MAX_SCAN_DEPTH); while (--depth >= 0) { snprintf(buf, size, "/%s", down[depth]->d_name); buf += down[depth]->name_len; /* '/' + d_name */ size -= down[depth]->name_len; if (size <= 0) break ; } } /* --- Directory cache live updating functions --- */ static int block_until_ready(void) { /* Block until dircache has been built. */ while (!dircache_initialized && dircache_is_initializing()) sleep(1); if (!dircache_initialized) return -1; return 0; } static struct dircache_entry* dircache_new_entry(const char *path, int attribute) { struct dircache_entry *entry; char basedir[MAX_PATH*2]; char *new; long last_cache_size = dircache_size; strncpy(basedir, path, sizeof(basedir)-1); new = strrchr(basedir, '/'); if (new == NULL) { logf("error occurred"); dircache_initialized = false; return NULL; } *new = '\0'; new++; entry = dircache_get_entry(basedir, false, true); if (entry == NULL) { logf("basedir not found!"); logf("%s", basedir); dircache_initialized = false; return NULL; } if (reserve_used + 2*sizeof(struct dircache_entry) + strlen(new)+1 >= DIRCACHE_RESERVE) { logf("not enough space"); dircache_initialized = false; return NULL; } while (entry->next != NULL) entry = entry->next; if (entry->name_len > 0) entry = dircache_gen_next(entry); if (entry == NULL) { dircache_initialized = false; return NULL; } entry->attribute = attribute; entry->name_len = MIN(254, strlen(new)) + 1; entry->d_name = ((char *)dircache_root+dircache_size); entry->startcluster = 0; entry->wrtdate = 0; entry->wrttime = 0; entry->size = 0; memcpy(entry->d_name, new, entry->name_len); dircache_size += entry->name_len; if (attribute & ATTR_DIRECTORY) { logf("gen_down"); dircache_gen_down(entry); } reserve_used += dircache_size - last_cache_size; return entry; } void dircache_bind(int fd, const char *path) { struct dircache_entry *entry; /* Queue requests until dircache has been built. */ if (!dircache_initialized && dircache_is_initializing()) { if (fdbind_idx >= MAX_PENDING_BINDINGS) return ; strncpy(fdbind_cache[fdbind_idx].path, path, sizeof(fdbind_cache[fdbind_idx].path)-1); fdbind_cache[fdbind_idx].fd = fd; fdbind_idx++; return ; } if (!dircache_initialized) return ; logf("bind: %d/%s", fd, path); entry = dircache_get_entry(path, false, false); if (entry == NULL) { logf("not found!"); dircache_initialized = false; return ; } fd_bindings[fd] = entry; } void dircache_update_filesize(int fd, long newsize, long startcluster) { if (!dircache_initialized || fd < 0) return ; if (fd_bindings[fd] == NULL) { logf("dircache fd access error"); dircache_initialized = false; return ; } fd_bindings[fd]->size = newsize; fd_bindings[fd]->startcluster = startcluster; } void dircache_update_filetime(int fd) { #if CONFIG_RTC == 0 (void)fd; #else short year; struct tm *now = get_time(); if (!dircache_initialized || fd < 0) return ; if (fd_bindings[fd] == NULL) { logf("dircache fd access error"); dircache_initialized = false; return ; } year = now->tm_year+1900-1980; fd_bindings[fd]->wrtdate = (((year)&0x7f)<<9) | (((now->tm_mon+1)&0xf)<<5) | (((now->tm_mday)&0x1f)); fd_bindings[fd]->wrttime = (((now->tm_hour)&0x1f)<<11) | (((now->tm_min)&0x3f)<<5) | (((now->tm_sec/2)&0x1f)); #endif } void dircache_mkdir(const char *path) { /* Test ok. */ if (block_until_ready()) return ; logf("mkdir: %s", path); dircache_new_entry(path, ATTR_DIRECTORY); } void dircache_rmdir(const char *path) { /* Test ok. */ struct dircache_entry *entry; if (block_until_ready()) return ; logf("rmdir: %s", path); entry = dircache_get_entry(path, true, true); if (entry == NULL) { logf("not found!"); dircache_initialized = false; return ; } entry->down = NULL; entry->name_len = 0; } /* Remove a file from cache */ void dircache_remove(const char *name) { /* Test ok. */ struct dircache_entry *entry; if (block_until_ready()) return ; logf("remove: %s", name); entry = dircache_get_entry(name, false, false); if (entry == NULL) { logf("not found!"); dircache_initialized = false; return ; } entry->name_len = 0; } void dircache_rename(const char *oldpath, const char *newpath) { /* Test ok. */ struct dircache_entry *entry, *newentry; struct dircache_entry oldentry; char absolute_path[MAX_PATH*2]; char *p; if (block_until_ready()) return ; logf("rename: %s->%s", oldpath, newpath); entry = dircache_get_entry(oldpath, true, false); if (entry == NULL) { logf("not found!"); dircache_initialized = false; return ; } /* Delete the old entry. */ entry->name_len = 0; /** If we rename the same filename twice in a row, we need to * save the data, because the entry will be re-used. */ oldentry = *entry; /* Generate the absolute path for destination if necessary. */ if (newpath[0] != '/') { strncpy(absolute_path, oldpath, sizeof(absolute_path)-1); p = strrchr(absolute_path, '/'); if (!p) { logf("Invalid path"); dircache_initialized = false; return ; } *p = '\0'; strncpy(p, absolute_path, sizeof(absolute_path)-1-strlen(p)); newpath = absolute_path; } newentry = dircache_new_entry(newpath, entry->attribute); if (newentry == NULL) { dircache_initialized = false; return ; } newentry->down = oldentry.down; newentry->size = oldentry.size; newentry->startcluster = oldentry.startcluster; newentry->wrttime = oldentry.wrttime; newentry->wrtdate = oldentry.wrtdate; } void dircache_add_file(const char *path, long startcluster) { struct dircache_entry *entry; if (block_until_ready()) return ; logf("add file: %s", path); entry = dircache_new_entry(path, 0); if (entry == NULL) return ; entry->startcluster = startcluster; } DIR_CACHED* opendir_cached(const char* name) { struct dircache_entry *cache_entry; int dd; DIR_CACHED* pdir = opendirs; if ( name[0] != '/' ) { DEBUGF("Only absolute paths supported right now\n"); return NULL; } /* find a free dir descriptor */ for ( dd=0; ddbusy ) break; if ( dd == MAX_OPEN_DIRS ) { DEBUGF("Too many dirs open\n"); errno = EMFILE; return NULL; } if (!dircache_initialized) { pdir->regulardir = opendir_uncached(name); if (!pdir->regulardir) return NULL; pdir->busy = true; return pdir; } pdir->busy = true; pdir->regulardir = NULL; cache_entry = dircache_get_entry(name, false, true); pdir->entry = cache_entry; if (cache_entry == NULL) { pdir->busy = false; return NULL; } return pdir; } struct dircache_entry* readdir_cached(DIR_CACHED* dir) { struct dirent_uncached *regentry; struct dircache_entry *ce; if (!dir->busy) return NULL; if (dir->regulardir != NULL) { regentry = readdir_uncached(dir->regulardir); if (regentry == NULL) return NULL; strncpy(dir->secondary_entry.d_name, regentry->d_name, MAX_PATH-1); dir->secondary_entry.size = regentry->size; dir->secondary_entry.startcluster = regentry->startcluster; dir->secondary_entry.attribute = regentry->attribute; dir->secondary_entry.wrttime = regentry->wrttime; dir->secondary_entry.wrtdate = regentry->wrtdate; dir->secondary_entry.next = NULL; return &dir->secondary_entry; } do { if (dir->entry == NULL) return NULL; ce = dir->entry; if (ce->name_len == 0) dir->entry = ce->next; } while (ce->name_len == 0) ; dir->entry = ce->next; strncpy(dir->secondary_entry.d_name, ce->d_name, MAX_PATH-1); /* Can't do `dir->secondary_entry = *ce` because that modifies the d_name pointer. */ dir->secondary_entry.size = ce->size; dir->secondary_entry.startcluster = ce->startcluster; dir->secondary_entry.attribute = ce->attribute; dir->secondary_entry.wrttime = ce->wrttime; dir->secondary_entry.wrtdate = ce->wrtdate; dir->secondary_entry.next = NULL; dir->internal_entry = ce; //logf("-> %s", ce->name); return &dir->secondary_entry; } int closedir_cached(DIR_CACHED* dir) { if (!dir->busy) return -1; dir->busy=false; if (dir->regulardir != NULL) return closedir_uncached(dir->regulardir); return 0; } int mkdir_cached(const char *name) { int rc=mkdir_uncached(name); if (rc >= 0) dircache_mkdir(name); return(rc); } int rmdir_cached(const char* name) { int rc=rmdir_uncached(name); if(rc>=0) dircache_rmdir(name); return(rc); }