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qemu: boot from mtd using mtd2block

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doesn't make much difference for squashfs but this will make it much
simpler to test jffs2/ubifs
This commit is contained in:
Daniel Barlow 2023-04-02 18:49:40 +01:00
parent 07e7d63ade
commit 342c87b256
3 changed files with 35 additions and 16 deletions
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5
devices/qemu/default.nix
View file

@ -25,6 +25,11 @@
CPU_BIG_ENDIAN= "y";
CPU_MIPS32_R2= "y";
MTD = "y";
MTD_BLOCK2MTD = "y";
MTD_BLKDEVS = "y";
MTD_BLOCK = "y";
SQUASHFS = "y";
SQUASHFS_XZ = "y";

2
pkgs/mips-vm/mips-vm.sh
View file

@ -29,7 +29,7 @@ echo $QEMU_OPTIONS
qemu-system-mips \
-M malta -m 256 \
-echr 16 \
-append "liminix default console=ttyS0,38400n8 panic=10 oops=panic init=$INIT loglevel=8 root=/dev/vda" \
-append "liminix default console=ttyS0,38400n8 panic=10 oops=panic init=$INIT loglevel=8 root=/dev/mtdblock0 block2mtd.block2mtd=/dev/vda,4096" \
-drive file=$2,format=raw,readonly=on,if=virtio \
-netdev socket,id=access,mcast=230.0.0.1:1234,localaddr=127.0.0.1 \
-device virtio-net-pci,disable-legacy=on,disable-modern=off,netdev=access,mac=ba:ad:1d:ea:21:02 \

42
pkgs/mtdutils/0001-mkfs.jffs2-add-graft-option.patch
View file

@ -1,4 +1,4 @@
From 21c84f244520f3656ffff3cc9b213d70480dc36d Mon Sep 17 00:00:00 2001
From 65cefb4cffadbd3b7adb9ff4a80db2914b0da4fd Mon Sep 17 00:00:00 2001
From: Daniel Barlow <dan@telent.net>
Date: Fri, 31 Mar 2023 23:33:04 +0100
Subject: [PATCH] mkfs.jffs2: add --graft option
@ -12,14 +12,14 @@ mkfs.jffs2 -r ./rootfs --graft $HOME/Pictures:/pictures
to add your photo collection into the filesystem at /pictures
without first copying it to rootfs
---
jffsX-utils/mkfs.jffs2.c | 63 ++++++++++++++++++++++++++++++++++++++--
1 file changed, 61 insertions(+), 2 deletions(-)
jffsX-utils/mkfs.jffs2.c | 76 +++++++++++++++++++++++++++++++++++++++-
1 file changed, 75 insertions(+), 1 deletion(-)
diff --git a/jffsX-utils/mkfs.jffs2.c b/jffsX-utils/mkfs.jffs2.c
index bd67634..ebf2d98 100644
index bd67634..a33f4b4 100644
--- a/jffsX-utils/mkfs.jffs2.c
+++ b/jffsX-utils/mkfs.jffs2.c
@@ -112,6 +112,13 @@ static int squash_perms = 0;
@@ -112,6 +112,14 @@ static int squash_perms = 0;
static int fake_times = 0;
int target_endian = __BYTE_ORDER;
@ -27,13 +27,14 @@ index bd67634..ebf2d98 100644
+ struct graft *next;
+ const char * source;
+ const char * dest;
+ struct stat st;
+} * grafts = 0;
+
+
static uint32_t find_hardlink(struct filesystem_entry *e)
{
struct filesystem_entry *f;
@@ -597,6 +604,16 @@ static void cleanup(struct filesystem_entry *dir)
@@ -597,6 +605,16 @@ static void cleanup(struct filesystem_entry *dir)
}
}
@ -50,7 +51,7 @@ index bd67634..ebf2d98 100644
/* Here is where we do the actual creation of the file system */
#include "mtd/jffs2-user.h"
@@ -1359,6 +1376,7 @@ static void create_target_filesystem(struct filesystem_entry *root)
@@ -1359,6 +1377,7 @@ static void create_target_filesystem(struct filesystem_entry *root)
static struct option long_options[] = {
{"pad", 2, NULL, 'p'},
{"root", 1, NULL, 'r'},
@ -58,7 +59,7 @@ index bd67634..ebf2d98 100644
{"pagesize", 1, NULL, 's'},
{"eraseblock", 1, NULL, 'e'},
{"output", 1, NULL, 'o'},
@@ -1396,6 +1414,9 @@ static const char helptext[] =
@@ -1396,6 +1415,9 @@ static const char helptext[] =
" not specified, the output is padded to the end of\n"
" the final erase block\n"
" -r, -d, --root=DIR Build file system from directory DIR (default: cwd)\n"
@ -68,7 +69,7 @@ index bd67634..ebf2d98 100644
" -s, --pagesize=SIZE Use page size (max data node size) SIZE.\n"
" Set according to target system's memory management\n"
" page size (default: 4KiB)\n"
@@ -1430,6 +1451,24 @@ static const char helptext[] =
@@ -1430,6 +1452,25 @@ static const char helptext[] =
" -V, --version Display version information\n"
" -i, --incremental=FILE Parse FILE and generate appendage output for it\n\n";
@ -86,6 +87,7 @@ index bd67634..ebf2d98 100644
+ ;
+ graft->source = source;
+ graft->dest = dest;
+ memcpy((void *) &(graft->st), (void *) &st, sizeof st);
+ graft->next = calloc(sizeof (struct graft), 1);
+ return 0;
+}
@ -93,7 +95,7 @@ index bd67634..ebf2d98 100644
static int load_next_block(void) {
int ret;
@@ -1579,7 +1618,7 @@ int main(int argc, char **argv)
@@ -1579,7 +1620,7 @@ int main(int argc, char **argv)
jffs2_compressors_init();
while ((opt = getopt_long(argc, argv,
@ -102,7 +104,7 @@ index bd67634..ebf2d98 100644
{
switch (opt) {
case 'D':
@@ -1598,6 +1637,18 @@ int main(int argc, char **argv)
@@ -1598,6 +1639,18 @@ int main(int argc, char **argv)
rootdir = xstrdup(optarg);
break;
@ -121,18 +123,30 @@ index bd67634..ebf2d98 100644
case 's':
page_size = strtol(optarg, NULL, 0);
warn_page_size = 0; /* set by user, so don't need to warn */
@@ -1784,13 +1835,21 @@ int main(int argc, char **argv)
@@ -1784,13 +1837,34 @@ int main(int argc, char **argv)
parse_image();
root = recursive_add_host_directory(NULL, "/", cwd);
-
+ for(struct graft *g = grafts; g && g->source; g=g->next) {
+ char *tmp = xstrdup(g->dest);
+ struct filesystem_entry * entry =
+ find_filesystem_entry(root, (char *) g->dest, S_IFDIR);
+ find_filesystem_entry(root, dirname(tmp), S_IFDIR);
+ free(tmp);
+ if(!entry)
+ errmsg_die("missing directory %s for graft point %s",
+ g->dest, g->source);
+ if (S_ISDIR(g->st.st_mode)) {
+ recursive_add_host_directory(entry, g->dest, g->source);
+ } else {
+ add_host_filesystem_entry(g->dest,
+ g->source,
+ g->st.st_uid,
+ g->st.st_gid,
+ g->st.st_mode,
+ g->st.st_rdev,
+ entry);
+ }
+ }
if (devtable)
parse_device_table(root, devtable);