echfs: Add directory support
diff --git a/Makefile b/Makefile
index 6d7c3147..a1fb6ce6 100644
--- a/Makefile
+++ b/Makefile
@@ -14,8 +14,8 @@ echfs-test: all
parted -s test.img mkpart primary 2048s 6143s
parted -s test.img mkpart primary 6144s 131038s
echfs-utils -g -p1 test.img quick-format 512
- echfs-utils -g -p1 test.img import test/test.elf test.elf
- echfs-utils -g -p1 test.img import test/qloader2.cfg qloader2.cfg
+ echfs-utils -g -p1 test.img import test/test.elf boot/test.elf
+ echfs-utils -g -p1 test.img import test/qloader2.cfg boot/qloader2.cfg
./qloader2-install src/qloader2.bin test.img 2048
qemu-system-x86_64 -hda test.img -monitor stdio
diff --git a/src/fs/echfs.c b/src/fs/echfs.c
index 1ba6932d..6f0654d9 100644
--- a/src/fs/echfs.c
+++ b/src/fs/echfs.c
@@ -3,6 +3,7 @@
#include <lib/libc.h>
#include <lib/blib.h>
#include <drivers/disk.h>
+#include <stdbool.h>
struct echfs_identity_table {
uint8_t jmp[4];
@@ -15,6 +16,7 @@ struct echfs_identity_table {
#define ROOT_DIR_ID (~((uint64_t)0))
#define END_OF_CHAIN (~((uint64_t)0))
#define FILE_TYPE 0
+#define DIR_TYPE 1
static int read_block(struct echfs_file_handle *file, void *buf, uint64_t block, uint64_t offset, uint64_t count) {
return read_partition(file->disk, &file->part, buf, (file->alloc_map[block] * file->block_size) + offset, count);
@@ -50,7 +52,9 @@ int echfs_check_signature(int disk, int partition) {
return 1;
}
-int echfs_open(struct echfs_file_handle *ret, int disk, int partition, const char *filename) {
+int echfs_open(struct echfs_file_handle *ret, int disk, int partition, const char *path) {
+ const char *fullpath = path;
+
ret->disk = disk;
get_part(&ret->part, disk, partition);
@@ -59,7 +63,7 @@ int echfs_open(struct echfs_file_handle *ret, int disk, int partition, const cha
read_partition(disk, &ret->part, &id_table, 0, sizeof(struct echfs_identity_table));
if (strncmp(id_table.signature, "_ECH_FS_", 8)) {
- print("echfs: signature invalid\n", filename);
+ print("echfs: signature invalid\n");
return -1;
}
@@ -71,6 +75,23 @@ int echfs_open(struct echfs_file_handle *ret, int disk, int partition, const cha
ret->dir_offset = ret->alloc_table_offset + ret->alloc_table_size;
// Find the file in the root dir.
+ uint64_t wanted_parent = ROOT_DIR_ID;
+ bool last_elem = false;
+
+next:;
+ char wanted_name[128];
+ for (; *path == '/'; path++);
+ for (int i = 0; ; i++, path++) {
+ if (*path == '\0' || *path == '/') {
+ if (*path == '\0')
+ last_elem = true;
+ wanted_name[i] = '\0';
+ path++;
+ break;
+ }
+ wanted_name[i] = *path;
+ }
+
for (uint64_t i = 0; i < ret->dir_length; i += sizeof(struct echfs_dir_entry)) {
read_partition(disk, &ret->part, &ret->dir_entry, i + ret->dir_offset, sizeof(struct echfs_dir_entry));
@@ -78,14 +99,19 @@ int echfs_open(struct echfs_file_handle *ret, int disk, int partition, const cha
break;
}
- if (!strcmp(filename, ret->dir_entry.name) &&
- ret->dir_entry.parent_id == ROOT_DIR_ID &&
- ret->dir_entry.type == FILE_TYPE) {
- goto found;
+ if (!strcmp(wanted_name, ret->dir_entry.name) &&
+ ret->dir_entry.parent_id == wanted_parent &&
+ ret->dir_entry.type == (last_elem ? FILE_TYPE : DIR_TYPE)) {
+ if (last_elem) {
+ goto found;
+ } else {
+ wanted_parent = ret->dir_entry.payload;
+ goto next;
+ }
}
}
- print("echfs: file %s not found\n", filename);
+ print("echfs: file %s not found\n", fullpath);
return -1;
found:;
diff --git a/test/qloader2.cfg b/test/qloader2.cfg
index d5799bcd..6569024d 100644
--- a/test/qloader2.cfg
+++ b/test/qloader2.cfg
@@ -1,14 +1,10 @@
TIMEOUT=3
KERNEL_PARTITION=1
-KERNEL_PATH=test.elf
+KERNEL_PATH=/boot/test.elf
KERNEL_PROTO=stivale
KERNEL_CMDLINE=none
MODULE_PARTITION=1
-MODULE_PATH=qloader2.cfg
+MODULE_PATH=/boot/qloader2.cfg
MODULE_STRING=something here
-
-MODULE_PARTITION=1
-MODULE_PATH=qloader2.cfg
-MODULE_STRING=second module
