The idea of the stickypage was to have a 4K memory region persistent over resets. This region was implemented as mmap of a temporary hostfile, which was created on first barebox start and maintained over resets. Usability was a bit lacking however: - The temporary files weren't deleted - state always showed warnings and errors on first boot. The banner telling users to ignore this wasn't best user experience - In the same vein, the power driver had logic to handle a fresh (zeroed) stickypage and interpret that as POR boot We can avoid all that, by just shipping a default stickypage and referencing that from DT. Do that. Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx> --- .gitignore | 1 + Makefile | 2 +- arch/sandbox/Makefile | 8 ++ arch/sandbox/board/env/init/state | 13 --- arch/sandbox/board/hostfile.c | 19 ++-- arch/sandbox/board/power.c | 2 - arch/sandbox/board/stickypage.bin | Bin 0 -> 4097 bytes arch/sandbox/dts/sandbox.dts | 1 + .../sandbox/mach-sandbox/include/mach/linux.h | 1 + arch/sandbox/os/common.c | 83 ++++++++---------- 10 files changed, 59 insertions(+), 71 deletions(-) delete mode 100644 arch/sandbox/board/env/init/state create mode 100644 arch/sandbox/board/stickypage.bin diff --git a/.gitignore b/.gitignore index d7a37b3c9b39..529bcfc2128e 100644 --- a/.gitignore +++ b/.gitignore @@ -42,6 +42,7 @@ Module.symvers /TAGS /barebox* /System.map +/stickypage.bin # # git files that we don't want to ignore even it they are dot-files diff --git a/Makefile b/Makefile index f3a1bcc04cdd..6715a44d1e9e 100644 --- a/Makefile +++ b/Makefile @@ -1123,7 +1123,7 @@ endif # CONFIG_MODULES # Directories & files removed with 'make clean' CLEAN_DIRS += $(MODVERDIR) -CLEAN_FILES += barebox System.map include/generated/barebox_default_env.h \ +CLEAN_FILES += barebox System.map stickypage.bin include/generated/barebox_default_env.h \ .tmp_version .tmp_barebox* barebox.bin barebox.map \ .tmp_kallsyms* barebox.ldr compile_commands.json \ scripts/bareboxenv-target barebox-flash-image \ diff --git a/arch/sandbox/Makefile b/arch/sandbox/Makefile index 5fc7e227be67..5e35d598a232 100644 --- a/arch/sandbox/Makefile +++ b/arch/sandbox/Makefile @@ -75,3 +75,11 @@ common-y += $(BOARD) arch/sandbox/os/ arch/sandbox/lib/ common-$(CONFIG_OFTREE) += arch/sandbox/dts/ CLEAN_FILES += $(BOARD)/barebox.lds + +quiet_cmd_install = INSTALL $@ + cmd_install = install $< $@ + +stickypage.bin: arch/sandbox/board/stickypage.bin + $(call cmd,install) + +all: stickypage.bin diff --git a/arch/sandbox/board/env/init/state b/arch/sandbox/board/env/init/state deleted file mode 100644 index b8a2b42a53ea..000000000000 --- a/arch/sandbox/board/env/init/state +++ /dev/null @@ -1,13 +0,0 @@ -if [ "x$state.dirty" != "x1" -o $global.system.reset != "POR" ]; then - exit -fi - -source /env/data/ansi-colors - -echo -e $CYAN -echo "*******************************************************" -echo "*** Inconsistent barebox state buckets detected ***" -echo "*** This is normal for a first boot ***" -echo "*** barebox will repair them on next poweroff/reset ***" -echo "*******************************************************" -echo -e -n $NC diff --git a/arch/sandbox/board/hostfile.c b/arch/sandbox/board/hostfile.c index 0346590889ed..f11062197934 100644 --- a/arch/sandbox/board/hostfile.c +++ b/arch/sandbox/board/hostfile.c @@ -232,12 +232,21 @@ static int of_hostfile_map_fixup(struct device_node *root, void *ctx) for_each_compatible_node_from(node, root, NULL, hostfile_dt_ids->compatible) { struct hf_info hf = {}; uint64_t reg[2] = {}; - bool no_filename; hf.devname = node->name; ret = of_property_read_string(node, "barebox,filename", &hf.filename); - no_filename = ret; + if (ret) { + pr_err("skipping nameless hostfile %s\n", hf.devname); + continue; + } + + if (memcmp(hf.filename, "$build/", 7) == 0) { + char *fullpath = xasprintf("%s/%s", linux_get_builddir(), + hf.filename + sizeof "$build/" - 1); + + hf.filename = fullpath; + } hf.is_blockdev = of_property_read_bool(node, "barebox,blockdev"); hf.is_cdev = of_property_read_bool(node, "barebox,cdev"); @@ -263,12 +272,6 @@ static int of_hostfile_map_fixup(struct device_node *root, void *ctx) if (ret) goto out; - if (no_filename) { - ret = of_property_write_string(node, "barebox,filename", hf.filename); - if (ret) - goto out; - } - ret = of_property_write_u32(node, "barebox,fd", hf.fd); out: if (ret) diff --git a/arch/sandbox/board/power.c b/arch/sandbox/board/power.c index 57801c8c3dc4..3112c80348e7 100644 --- a/arch/sandbox/board/power.c +++ b/arch/sandbox/board/power.c @@ -64,8 +64,6 @@ static int sandbox_power_probe(struct device_d *dev) rst = nvmem_cell_read(power->reset_source_cell, &len); if (!IS_ERR(rst)) { - if (*rst == 0) - *rst = RESET_POR; reset_source_set_prinst(*rst, RESET_SOURCE_DEFAULT_PRIORITY, 0); free(rst); diff --git a/arch/sandbox/board/stickypage.bin b/arch/sandbox/board/stickypage.bin new file mode 100644 index 0000000000000000000000000000000000000000..e507ca656e6488ff5cebbdda8169f1ab153abb19 GIT binary patch literal 4097 zcmZQz7zLvtFmgkHapZa(?DNW9{guc;01FSE%sKVQ;-l=*5Eu=C(GVC7fzc2c4T0ek z0-yheC`$mnv#iZ}6$1kYgJgm2?vzezLr^<_nFwzVw0<I-II3hc1V%#uM+k5M0H)F! AIsgCw literal 0 HcmV?d00001 diff --git a/arch/sandbox/dts/sandbox.dts b/arch/sandbox/dts/sandbox.dts index 595a1e8eae73..5b2cab219e2a 100644 --- a/arch/sandbox/dts/sandbox.dts +++ b/arch/sandbox/dts/sandbox.dts @@ -55,6 +55,7 @@ stickypage: stickypage { compatible = "barebox,hostfile", "syscon", "simple-mfd"; + barebox,filename = "$build/stickypage.bin"; reg = <0 0 0 4096>; barebox,cdev; /* no caching allowed */ diff --git a/arch/sandbox/mach-sandbox/include/mach/linux.h b/arch/sandbox/mach-sandbox/include/mach/linux.h index 831e170d90ef..453813952e55 100644 --- a/arch/sandbox/mach-sandbox/include/mach/linux.h +++ b/arch/sandbox/mach-sandbox/include/mach/linux.h @@ -13,6 +13,7 @@ int linux_register_device(const char *name, void *start, void *end); int tap_alloc(const char *dev); uint64_t linux_get_time(void); int linux_open(const char *filename, int readwrite); +const char *linux_get_builddir(void); int linux_open_hostfile(struct hf_info *hf); int linux_read(int fd, void *buf, size_t count); int linux_read_nonblock(int fd, void *buf, size_t count); diff --git a/arch/sandbox/os/common.c b/arch/sandbox/os/common.c index 4eb6d37fffc1..e36e3972bc0d 100644 --- a/arch/sandbox/os/common.c +++ b/arch/sandbox/os/common.c @@ -127,9 +127,23 @@ void __attribute__((noreturn)) linux_exit(void) exit(0); } -static size_t saved_argv_len; static char **saved_argv; +static int selfpath(char *buf, size_t len) +{ + int ret; + + /* we must follow the symlink, so we can exec an updated executable */ + ret = readlink("/proc/self/exe", buf, len - 1); + if (ret < 0) + return ret; + + if (0 < ret && ret < len - 1) + buf[ret] = '\0'; + + return ret; +} + void linux_reexec(void) { char buf[4097]; @@ -138,9 +152,8 @@ void linux_reexec(void) cookmode(); /* we must follow the symlink, so we can exec an updated executable */ - ret = readlink("/proc/self/exe", buf, sizeof(buf) - 1); - if (0 < ret && ret < sizeof(buf) - 1) { - buf[ret] = '\0'; + ret = selfpath(buf, sizeof(buf)); + if (ret > 0) { execv(buf, saved_argv); if (!strcmp(&buf[ret - DELETED_OFFSET], " (deleted)")) { printf("barebox image on disk changed. Loading new.\n"); @@ -317,6 +330,21 @@ static int add_image(const char *_str, char *devname_template, int *devname_numb return ret; } +const char *linux_get_builddir(void) +{ + static char path[4097]; + int ret; + + if (!path[0]) { + ret = selfpath(path, sizeof(path)); + if (ret < 0) + return NULL; + dirname(path); + } + + return path; +} + int linux_open_hostfile(struct hf_info *hf) { char *buf = NULL; @@ -327,45 +355,10 @@ int linux_open_hostfile(struct hf_info *hf) hf->filename ? "" : "initially un", hf->filename ?: "", hf->is_readonly ? "(ro)" : ""); - if (hf->filename) { - fd = hf->fd = open(hf->filename, (hf->is_readonly ? O_RDONLY : O_RDWR) | O_CLOEXEC); - } else { - char *filename; - int ret; - - ret = asprintf(&buf, "--image=%s=/tmp/barebox-hostfileXXXXXX", hf->devname); - if (ret < 0) { - perror("asprintf"); - goto err_out; - } - - filename = buf + strlen("--image==") + strlen(hf->devname); - - fd = hf->fd = mkstemp(filename); - if (fd >= 0) { - ret = fcntl(fd, F_SETFD, FD_CLOEXEC); - if (ret < 0) { - perror("fcntl"); - goto err_out; - } - - ret = ftruncate(fd, hf->size); - if (ret < 0) { - perror("ftruncate"); - goto err_out; - } - - hf->filename = filename; - - saved_argv = realloc(saved_argv, - ++saved_argv_len * sizeof(*saved_argv)); - if (!saved_argv) - exit(1); - saved_argv[saved_argv_len - 2] = buf; - saved_argv[saved_argv_len - 1] = NULL; - } - } + if (!hf->filename) + return -ENOENT; + fd = hf->fd = open(hf->filename, (hf->is_readonly ? O_RDONLY : O_RDWR) | O_CLOEXEC); if (fd < 0) { perror("open"); goto err_out; @@ -517,11 +510,7 @@ int main(int argc, char *argv[]) } } - saved_argv_len = argc + 1; - saved_argv = calloc(saved_argv_len, sizeof(*saved_argv)); - if (!saved_argv) - exit(1); - memcpy(saved_argv, argv, saved_argv_len * sizeof(*saved_argv)); + saved_argv = argv; ram = malloc(malloc_size); if (!ram) { -- 2.29.2 _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox