emunand: Use HOS archive style for rawnand parts

fusee/fusee-secondary/src/device_partition.c

@@ -104,7 +104,8 @@ int emu_device_partition_read_data(device_partition_t *devpart, void *dst, uint6
             }
         }
         
-        snprintf(target_path, sizeof(target_path) - 1, "%s%02d", origin_path, target_part);
+        /* Treat the path as a folder with each part inside. */
+        snprintf(target_path, sizeof(target_path) - 1, "%s/%02d", origin_path, target_part);
     } else {
         target_sector = sector;
         strcpy(target_path, origin_path);
@@ -176,7 +177,8 @@ int emu_device_partition_write_data(device_partition_t *devpart, const void *src
             }
         }
         
-        snprintf(target_path, sizeof(target_path) - 1, "%s%02d", origin_path, target_part);
+        /* Treat the path as a folder with each part inside. */
+        snprintf(target_path, sizeof(target_path) - 1, "%s/%02d", origin_path, target_part);
     } else {
         target_sector = sector;
         strcpy(target_path, origin_path);

fusee/fusee-secondary/src/fs_dev.c

@@ -300,6 +300,21 @@ int fsdev_unmount_all(void) {
     return 0;
 }
 
+int fsdev_set_attr(const char *file, int attr, int mask) {
+    return fsdev_convert_rc(NULL, f_chmod(file, (BYTE)attr, (BYTE)mask));
+}
+
+int fsdev_get_attr(const char *file) {
+    FILINFO info;
+    FRESULT rc = f_stat(file, &info);
+
+    if (rc == FR_OK) {
+        return info.fattrib;
+    }
+
+    return fsdev_convert_rc(NULL, rc);
+}
+
 /* Adapted from https://github.com/benemorius/openOBC-devboard/blob/bf0a4a33e22d24e7c299f921d185da27377310e0/lib/fatfs/FatFS.cpp#L173 */
 static int fsdev_convert_rc(struct _reent *r, FRESULT rc) {
     int errornumber;

fusee/fusee-secondary/src/fs_dev.h

@@ -27,6 +27,9 @@ int fsdev_register_device(const char *name);
 int fsdev_unregister_device(const char *name);
 int fsdev_unmount_device(const char *name);         /* also unregisters. */
 
+int fsdev_set_attr(const char *file, int attr, int mask);       /* Non-standard function to set file DOS attributes. */
+int fsdev_get_attr(const char *file);                           /* Non-standard function to get file DOS attributes. */
+
 int fsdev_set_default_device(const char *name);     /* must be registered. */
 int fsdev_is_exfat(const char *name);               /* must be registered. */
 

fusee/fusee-secondary/src/lib/fatfs/ffconf.h

@@ -50,7 +50,7 @@
 /* This option switches f_expand function. (0:Disable or 1:Enable) */
 
 
-#define FF_USE_CHMOD	0
+#define FF_USE_CHMOD	1
 /* This option switches attribute manipulation functions, f_chmod() and f_utime().
 /  (0:Disable or 1:Enable) Also FF_FS_READONLY needs to be 0 to enable this option. */
 

fusee/fusee-secondary/src/nxboot.c

@@ -230,11 +230,12 @@ static bool nxboot_configure_emunand() {
         
         /* Check if full rawnand image file is present. */
         if (!is_valid_file(emunand_rawnand_base_path)) {
-            char emunand_rawnand_path[0x300 + 3 + 1] = {0};
+            char emunand_rawnand_path[0x300 + 4 + 1] = {0};
             
             /* Search for rawnand part files instead. */
             for (int i = 0; i < 64; i++) {
-                snprintf(emunand_rawnand_path, sizeof(emunand_rawnand_path) - 1, "%s%02d", emunand_rawnand_base_path, i);
+                /* Treat rawnand as a folder with each part inside. */
+                snprintf(emunand_rawnand_path, sizeof(emunand_rawnand_path) - 1, "%s/%02d", emunand_rawnand_base_path, i);
                 if (is_valid_file(emunand_rawnand_path)) {
                     if (i == 0) {
                         /* The size of the first part file should tell us the part limit. */

fusee/fusee-secondary/src/nxfs.c

@@ -26,6 +26,8 @@
 #include "utils.h"
 #include "sdmmc/sdmmc.h"
 
+#include "lib/fatfs/ff.h"
+
 static bool g_ahb_redirect_enabled = false;
 static bool g_sd_device_initialized = false;
 static bool g_emmc_device_initialized = false;
@@ -154,6 +156,7 @@ static int mmc_partition_write(device_partition_t *devpart, const void *src, uin
 }
 
 static int emummc_partition_initialize(device_partition_t *devpart) {
+    /* Allocate the crypto work buffer. */
     if ((devpart->read_cipher != NULL) || (devpart->write_cipher != NULL)) {
         devpart->crypto_work_buffer = memalign(16, devpart->sector_size * 16);
         if (devpart->crypto_work_buffer == NULL) {
@@ -166,12 +169,16 @@ static int emummc_partition_initialize(device_partition_t *devpart) {
         devpart->crypto_work_buffer_num_sectors = 0;
     }
     devpart->initialized = true;
+    
     return 0;
 }
 
 static void emummc_partition_finalize(device_partition_t *devpart) {    
+    /* Free the crypto work buffer. */
+    if (devpart->crypto_work_buffer != NULL) {
         free(devpart->crypto_work_buffer);
     }
+}
 
 static int nxfs_bis_crypto_decrypt(device_partition_t *devpart, uint64_t sector, uint64_t num_sectors) {
     unsigned int keyslot_a = 4; /* These keyslots are never used by exosphere, and should be safe. */
@@ -566,6 +573,30 @@ int nxfs_mount_emu_emmc(const char *emunand_boot0_path, const char *emunand_boot
     model.num_sectors = (256ull << 30) / model.sector_size;
     
     if (!is_exfat) {
+        /* For multiple parts we want a folder with the archive bit set. */
+        rc = fsdev_get_attr(emunand_rawnand_base_path);
+        
+        /* Failed to get file DOS attributes. */
+        if (rc == -1) {
+            return -1;
+        }
+        
+        /* Our path is not a directory. */
+        if (!(rc & AM_DIR)) {
+            return -1;
+        }
+        
+        /* Check if the archive bit is not set. */
+        if (!(rc & AM_ARC)) {
+            /* Try to set the archive bit. */
+            rc = fsdev_set_attr(emunand_rawnand_base_path, AM_ARC, AM_ARC);
+            
+            /* Failed to set file DOS attributes. */
+            if (rc == -1) {
+                return -1;
+            }
+        }
+        
         /* Mount emulated raw NAND device from multiple parts. */
         rc = emudev_mount_device_multipart("rawnand", &model, emunand_rawnand_base_path, num_parts, part_limit);