mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-14 23:33:00 +00:00
c889434845
In a few cases the error handling is not quite right. Make sure we return the actual error in distro_efi_read_bootflow_file() rather than -EINVAL. Return -IO when a file cannot be read. Also show the error name if available. This does not change operation, but does make it easier to diagnose problems. Signed-off-by: Simon Glass <sjg@chromium.org>
453 lines
9.7 KiB
C
453 lines
9.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2021 Google LLC
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#define LOG_CATEGORY UCLASS_BOOTSTD
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#include <common.h>
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#include <blk.h>
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#include <bootflow.h>
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#include <bootmeth.h>
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#include <bootstd.h>
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#include <dm.h>
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#include <env_internal.h>
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#include <fs.h>
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#include <malloc.h>
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#include <mapmem.h>
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#include <dm/uclass-internal.h>
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DECLARE_GLOBAL_DATA_PTR;
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int bootmeth_get_state_desc(struct udevice *dev, char *buf, int maxsize)
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{
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const struct bootmeth_ops *ops = bootmeth_get_ops(dev);
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if (!ops->get_state_desc)
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return -ENOSYS;
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return ops->get_state_desc(dev, buf, maxsize);
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}
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int bootmeth_check(struct udevice *dev, struct bootflow_iter *iter)
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{
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const struct bootmeth_ops *ops = bootmeth_get_ops(dev);
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if (!ops->check)
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return 0;
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return ops->check(dev, iter);
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}
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int bootmeth_read_bootflow(struct udevice *dev, struct bootflow *bflow)
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{
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const struct bootmeth_ops *ops = bootmeth_get_ops(dev);
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if (!ops->read_bootflow)
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return -ENOSYS;
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return ops->read_bootflow(dev, bflow);
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}
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int bootmeth_set_bootflow(struct udevice *dev, struct bootflow *bflow,
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char *buf, int size)
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{
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const struct bootmeth_ops *ops = bootmeth_get_ops(dev);
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if (!ops->set_bootflow)
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return -ENOSYS;
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return ops->set_bootflow(dev, bflow, buf, size);
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}
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int bootmeth_boot(struct udevice *dev, struct bootflow *bflow)
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{
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const struct bootmeth_ops *ops = bootmeth_get_ops(dev);
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if (!ops->boot)
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return -ENOSYS;
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return ops->boot(dev, bflow);
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}
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int bootmeth_read_file(struct udevice *dev, struct bootflow *bflow,
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const char *file_path, ulong addr, ulong *sizep)
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{
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const struct bootmeth_ops *ops = bootmeth_get_ops(dev);
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if (!ops->read_file)
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return -ENOSYS;
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return ops->read_file(dev, bflow, file_path, addr, sizep);
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}
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int bootmeth_get_bootflow(struct udevice *dev, struct bootflow *bflow)
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{
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const struct bootmeth_ops *ops = bootmeth_get_ops(dev);
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if (!ops->read_bootflow)
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return -ENOSYS;
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bootflow_init(bflow, NULL, dev);
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return ops->read_bootflow(dev, bflow);
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}
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int bootmeth_setup_iter_order(struct bootflow_iter *iter, bool include_global)
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{
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struct bootstd_priv *std;
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struct udevice **order;
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int count;
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int ret;
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ret = bootstd_get_priv(&std);
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if (ret)
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return ret;
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/* Create an array large enough */
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count = std->bootmeth_count ? std->bootmeth_count :
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uclass_id_count(UCLASS_BOOTMETH);
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if (!count)
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return log_msg_ret("count", -ENOENT);
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order = calloc(count, sizeof(struct udevice *));
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if (!order)
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return log_msg_ret("order", -ENOMEM);
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/* If we have an ordering, copy it */
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if (IS_ENABLED(CONFIG_BOOTSTD_FULL) && std->bootmeth_count) {
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int i;
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/*
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* We don't support skipping global bootmeths. Instead, the user
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* should omit them from the ordering
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*/
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if (!include_global)
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return log_msg_ret("glob", -EPERM);
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memcpy(order, std->bootmeth_order,
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count * sizeof(struct bootmeth *));
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if (IS_ENABLED(CONFIG_BOOTMETH_GLOBAL)) {
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for (i = 0; i < count; i++) {
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struct udevice *dev = order[i];
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struct bootmeth_uc_plat *ucp;
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bool is_global;
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ucp = dev_get_uclass_plat(dev);
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is_global = ucp->flags &
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BOOTMETHF_GLOBAL;
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if (is_global) {
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iter->first_glob_method = i;
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break;
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}
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}
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}
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} else {
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struct udevice *dev;
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int i, upto, pass;
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/*
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* Do two passes, one to find the normal bootmeths and another
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* to find the global ones, if required, The global ones go at
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* the end.
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*/
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for (pass = 0, upto = 0; pass < 1 + include_global; pass++) {
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if (pass)
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iter->first_glob_method = upto;
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/*
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* Get a list of bootmethods, in seq order (i.e. using
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* aliases). There may be gaps so try to count up high
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* enough to find them all.
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*/
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for (i = 0; upto < count && i < 20 + count * 2; i++) {
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struct bootmeth_uc_plat *ucp;
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bool is_global;
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ret = uclass_get_device_by_seq(UCLASS_BOOTMETH,
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i, &dev);
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if (ret)
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continue;
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ucp = dev_get_uclass_plat(dev);
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is_global =
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IS_ENABLED(CONFIG_BOOTMETH_GLOBAL) &&
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(ucp->flags & BOOTMETHF_GLOBAL);
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if (pass ? is_global : !is_global)
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order[upto++] = dev;
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}
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}
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count = upto;
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}
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if (!count)
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return log_msg_ret("count2", -ENOENT);
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if (IS_ENABLED(CONFIG_BOOTMETH_GLOBAL) && include_global &&
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iter->first_glob_method != -1 && iter->first_glob_method != count) {
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iter->cur_method = iter->first_glob_method;
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iter->doing_global = true;
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}
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iter->method_order = order;
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iter->num_methods = count;
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return 0;
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}
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int bootmeth_set_order(const char *order_str)
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{
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struct bootstd_priv *std;
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struct udevice **order;
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int count, ret, i, len;
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const char *s, *p;
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ret = bootstd_get_priv(&std);
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if (ret)
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return ret;
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if (!order_str) {
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free(std->bootmeth_order);
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std->bootmeth_order = NULL;
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std->bootmeth_count = 0;
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return 0;
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}
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/* Create an array large enough */
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count = uclass_id_count(UCLASS_BOOTMETH);
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if (!count)
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return log_msg_ret("count", -ENOENT);
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order = calloc(count + 1, sizeof(struct udevice *));
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if (!order)
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return log_msg_ret("order", -ENOMEM);
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for (i = 0, s = order_str; *s && i < count; s = p + (*p == ' '), i++) {
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struct udevice *dev;
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p = strchrnul(s, ' ');
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len = p - s;
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ret = uclass_find_device_by_namelen(UCLASS_BOOTMETH, s, len,
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&dev);
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if (ret) {
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printf("Unknown bootmeth '%.*s'\n", len, s);
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free(order);
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return ret;
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}
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order[i] = dev;
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}
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order[i] = NULL;
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free(std->bootmeth_order);
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std->bootmeth_order = order;
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std->bootmeth_count = i;
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return 0;
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}
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/**
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* setup_fs() - Set up read to read a file
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*
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* We must redo the setup before each filesystem operation. This function
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* handles that, including setting the filesystem type if a block device is not
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* being used
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*
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* @bflow: Information about file to try
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* @desc: Block descriptor to read from (NULL if not a block device)
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* Return: 0 if OK, -ve on error
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*/
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static int setup_fs(struct bootflow *bflow, struct blk_desc *desc)
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{
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int ret;
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if (desc) {
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ret = fs_set_blk_dev_with_part(desc, bflow->part);
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if (ret)
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return log_msg_ret("set", ret);
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} else if (IS_ENABLED(CONFIG_BOOTSTD_FULL) && bflow->fs_type) {
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fs_set_type(bflow->fs_type);
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}
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return 0;
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}
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int bootmeth_try_file(struct bootflow *bflow, struct blk_desc *desc,
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const char *prefix, const char *fname)
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{
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char path[200];
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loff_t size;
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int ret, ret2;
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snprintf(path, sizeof(path), "%s%s", prefix ? prefix : "", fname);
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log_debug("trying: %s\n", path);
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free(bflow->fname);
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bflow->fname = strdup(path);
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if (!bflow->fname)
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return log_msg_ret("name", -ENOMEM);
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if (IS_ENABLED(CONFIG_BOOTSTD_FULL) && bflow->fs_type)
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fs_set_type(bflow->fs_type);
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ret = fs_size(path, &size);
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log_debug(" %s - err=%d\n", path, ret);
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/* Sadly FS closes the file after fs_size() so we must redo this */
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ret2 = setup_fs(bflow, desc);
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if (ret2)
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return log_msg_ret("fs", ret2);
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if (ret)
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return log_msg_ret("size", ret);
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bflow->size = size;
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bflow->state = BOOTFLOWST_FILE;
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return 0;
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}
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static int alloc_file(const char *fname, uint size, void **bufp)
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{
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loff_t bytes_read;
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ulong addr;
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char *buf;
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int ret;
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buf = malloc(size + 1);
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if (!buf)
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return log_msg_ret("buf", -ENOMEM);
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addr = map_to_sysmem(buf);
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ret = fs_read(fname, addr, 0, size, &bytes_read);
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if (ret) {
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free(buf);
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return log_msg_ret("read", ret);
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}
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if (size != bytes_read)
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return log_msg_ret("bread", -EIO);
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buf[size] = '\0';
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*bufp = buf;
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return 0;
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}
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int bootmeth_alloc_file(struct bootflow *bflow, uint size_limit, uint align)
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{
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void *buf;
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uint size;
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int ret;
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size = bflow->size;
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log_debug(" - script file size %x\n", size);
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if (size > size_limit)
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return log_msg_ret("chk", -E2BIG);
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ret = alloc_file(bflow->fname, bflow->size, &buf);
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if (ret)
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return log_msg_ret("all", ret);
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bflow->state = BOOTFLOWST_READY;
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bflow->buf = buf;
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return 0;
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}
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int bootmeth_alloc_other(struct bootflow *bflow, const char *fname,
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void **bufp, uint *sizep)
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{
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struct blk_desc *desc = NULL;
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char path[200];
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loff_t size;
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void *buf;
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int ret;
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snprintf(path, sizeof(path), "%s%s", bflow->subdir, fname);
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log_debug("trying: %s\n", path);
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if (bflow->blk)
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desc = dev_get_uclass_plat(bflow->blk);
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ret = setup_fs(bflow, desc);
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if (ret)
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return log_msg_ret("fs", ret);
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ret = fs_size(path, &size);
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log_debug(" %s - err=%d\n", path, ret);
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ret = setup_fs(bflow, desc);
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if (ret)
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return log_msg_ret("fs", ret);
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ret = alloc_file(path, size, &buf);
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if (ret)
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return log_msg_ret("all", ret);
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*bufp = buf;
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*sizep = size;
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return 0;
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}
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int bootmeth_common_read_file(struct udevice *dev, struct bootflow *bflow,
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const char *file_path, ulong addr, ulong *sizep)
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{
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struct blk_desc *desc = NULL;
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loff_t len_read;
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loff_t size;
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int ret;
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if (bflow->blk)
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desc = dev_get_uclass_plat(bflow->blk);
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ret = setup_fs(bflow, desc);
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if (ret)
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return log_msg_ret("fs", ret);
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ret = fs_size(file_path, &size);
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if (ret)
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return log_msg_ret("size", ret);
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if (size > *sizep)
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return log_msg_ret("spc", -ENOSPC);
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ret = setup_fs(bflow, desc);
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if (ret)
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return log_msg_ret("fs", ret);
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ret = fs_read(file_path, addr, 0, 0, &len_read);
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if (ret)
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return ret;
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*sizep = len_read;
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return 0;
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}
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#ifdef CONFIG_BOOTSTD_FULL
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/**
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* on_bootmeths() - Update the bootmeth order
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*
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* This will check for a valid baudrate and only apply it if valid.
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*/
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static int on_bootmeths(const char *name, const char *value, enum env_op op,
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int flags)
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{
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int ret;
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switch (op) {
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case env_op_create:
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case env_op_overwrite:
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ret = bootmeth_set_order(value);
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if (ret)
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return 1;
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return 0;
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case env_op_delete:
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bootmeth_set_order(NULL);
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fallthrough;
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default:
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return 0;
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}
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}
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U_BOOT_ENV_CALLBACK(bootmeths, on_bootmeths);
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#endif /* CONFIG_BOOTSTD_FULL */
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UCLASS_DRIVER(bootmeth) = {
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.id = UCLASS_BOOTMETH,
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.name = "bootmeth",
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.flags = DM_UC_FLAG_SEQ_ALIAS,
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.per_device_plat_auto = sizeof(struct bootmeth_uc_plat),
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};
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