Tracing updates:
Change in API of bootconfig (before it comes live in a release)
- Have a magic value "BOOTCONFIG" in initrd to know a bootconfig exists
- Set CONFIG_BOOT_CONFIG to 'n' by default
- Show error if "bootconfig" on cmdline but not compiled in
- Prevent redefining the same value
- Have a way to append values
- Added a SELECT BLK_DEV_INITRD to fix a build failure
Synthetic event fixes:
- Switch to raw_smp_processor_id() for recording CPU value in preempt
section. (No care for what the value actually is)
- Fix samples always recording u64 values
- Fix endianess
- Check number of values matches number of fields
- Fix a printing bug
Fix of trace_printk() breaking postponed start up tests
Make a function static that is only used in a single file.
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Merge tag 'trace-v5.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing and bootconfig updates:
"Fixes and changes to bootconfig before it goes live in a release.
Change in API of bootconfig (before it comes live in a release):
- Have a magic value "BOOTCONFIG" in initrd to know a bootconfig
exists
- Set CONFIG_BOOT_CONFIG to 'n' by default
- Show error if "bootconfig" on cmdline but not compiled in
- Prevent redefining the same value
- Have a way to append values
- Added a SELECT BLK_DEV_INITRD to fix a build failure
Synthetic event fixes:
- Switch to raw_smp_processor_id() for recording CPU value in preempt
section. (No care for what the value actually is)
- Fix samples always recording u64 values
- Fix endianess
- Check number of values matches number of fields
- Fix a printing bug
Fix of trace_printk() breaking postponed start up tests
Make a function static that is only used in a single file"
* tag 'trace-v5.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
bootconfig: Fix CONFIG_BOOTTIME_TRACING dependency issue
bootconfig: Add append value operator support
bootconfig: Prohibit re-defining value on same key
bootconfig: Print array as multiple commands for legacy command line
bootconfig: Reject subkey and value on same parent key
tools/bootconfig: Remove unneeded error message silencer
bootconfig: Add bootconfig magic word for indicating bootconfig explicitly
bootconfig: Set CONFIG_BOOT_CONFIG=n by default
tracing: Clear trace_state when starting trace
bootconfig: Mark boot_config_checksum() static
tracing: Disable trace_printk() on post poned tests
tracing: Have synthetic event test use raw_smp_processor_id()
tracing: Fix number printing bug in print_synth_event()
tracing: Check that number of vals matches number of synth event fields
tracing: Make synth_event trace functions endian-correct
tracing: Make sure synth_event_trace() example always uses u64
This commit is contained in:
Linus Torvalds
Коммит
91ad64a84e
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|
@ -62,6 +62,30 @@ Or more shorter, written as following::
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In both styles, same key words are automatically merged when parsing it
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at boot time. So you can append similar trees or key-values.
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Same-key Values
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---------------
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It is prohibited that two or more values or arrays share a same-key.
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For example,::
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foo = bar, baz
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foo = qux # !ERROR! we can not re-define same key
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If you want to append the value to existing key as an array member,
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you can use ``+=`` operator. For example::
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foo = bar, baz
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foo += qux
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In this case, the key ``foo`` has ``bar``, ``baz`` and ``qux``.
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However, a sub-key and a value can not co-exist under a parent key.
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For example, following config is NOT allowed.::
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foo = value1
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foo.bar = value2 # !ERROR! subkey "bar" and value "value1" can NOT co-exist
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Comments
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--------
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@ -102,9 +126,13 @@ Boot Kernel With a Boot Config
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==============================
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Since the boot configuration file is loaded with initrd, it will be added
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to the end of the initrd (initramfs) image file. The Linux kernel decodes
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the last part of the initrd image in memory to get the boot configuration
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data.
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to the end of the initrd (initramfs) image file with size, checksum and
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12-byte magic word as below.
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[initrd][bootconfig][size(u32)][checksum(u32)][#BOOTCONFIG\n]
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The Linux kernel decodes the last part of the initrd image in memory to
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get the boot configuration data.
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Because of this "piggyback" method, there is no need to change or
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update the boot loader and the kernel image itself.
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|
|
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@ -10,6 +10,9 @@
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#include <linux/kernel.h>
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#include <linux/types.h>
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#define BOOTCONFIG_MAGIC "#BOOTCONFIG\n"
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#define BOOTCONFIG_MAGIC_LEN 12
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/* XBC tree node */
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struct xbc_node {
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u16 next;
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@ -1226,13 +1226,12 @@ endif
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config BOOT_CONFIG
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bool "Boot config support"
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depends on BLK_DEV_INITRD
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default y
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select BLK_DEV_INITRD
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help
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Extra boot config allows system admin to pass a config file as
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complemental extension of kernel cmdline when booting.
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The boot config file must be attached at the end of initramfs
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with checksum and size.
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with checksum, size and magic word.
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See <file:Documentation/admin-guide/bootconfig.rst> for details.
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If unsure, say Y.
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|
|
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42
init/main.c
42
init/main.c
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@ -268,7 +268,6 @@ static int __init xbc_snprint_cmdline(char *buf, size_t size,
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{
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struct xbc_node *knode, *vnode;
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char *end = buf + size;
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char c = '\"';
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const char *val;
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int ret;
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@ -279,25 +278,20 @@ static int __init xbc_snprint_cmdline(char *buf, size_t size,
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return ret;
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vnode = xbc_node_get_child(knode);
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ret = snprintf(buf, rest(buf, end), "%s%c", xbc_namebuf,
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vnode ? '=' : ' ');
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if (ret < 0)
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return ret;
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buf += ret;
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if (!vnode)
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continue;
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c = '\"';
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xbc_array_for_each_value(vnode, val) {
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ret = snprintf(buf, rest(buf, end), "%c%s", c, val);
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if (!vnode) {
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ret = snprintf(buf, rest(buf, end), "%s ", xbc_namebuf);
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if (ret < 0)
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return ret;
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buf += ret;
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continue;
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}
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xbc_array_for_each_value(vnode, val) {
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ret = snprintf(buf, rest(buf, end), "%s=\"%s\" ",
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xbc_namebuf, val);
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if (ret < 0)
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return ret;
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buf += ret;
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c = ',';
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}
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if (rest(buf, end) > 2)
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strcpy(buf, "\" ");
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buf += 2;
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}
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return buf - (end - size);
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@ -335,7 +329,7 @@ static char * __init xbc_make_cmdline(const char *key)
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return new_cmdline;
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}
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u32 boot_config_checksum(unsigned char *p, u32 size)
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static u32 boot_config_checksum(unsigned char *p, u32 size)
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{
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u32 ret = 0;
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@ -374,7 +368,11 @@ static void __init setup_boot_config(const char *cmdline)
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if (!initrd_end)
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goto not_found;
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hdr = (u32 *)(initrd_end - 8);
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data = (char *)initrd_end - BOOTCONFIG_MAGIC_LEN;
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if (memcmp(data, BOOTCONFIG_MAGIC, BOOTCONFIG_MAGIC_LEN))
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goto not_found;
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hdr = (u32 *)(data - 8);
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size = hdr[0];
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csum = hdr[1];
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@ -418,6 +416,14 @@ not_found:
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}
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#else
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#define setup_boot_config(cmdline) do { } while (0)
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static int __init warn_bootconfig(char *str)
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{
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pr_warn("WARNING: 'bootconfig' found on the kernel command line but CONFIG_BOOTCONFIG is not set.\n");
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return 0;
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}
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early_param("bootconfig", warn_bootconfig);
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#endif
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/* Change NUL term back to "=", to make "param" the whole string. */
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|
|
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@ -143,8 +143,8 @@ if FTRACE
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config BOOTTIME_TRACING
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bool "Boot-time Tracing support"
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depends on BOOT_CONFIG && TRACING
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default y
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depends on TRACING
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select BOOT_CONFIG
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help
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Enable developer to setup ftrace subsystem via supplemental
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kernel cmdline at boot time for debugging (tracing) driver
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|
|
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@ -111,11 +111,11 @@ static int __init test_gen_synth_cmd(void)
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/* Create some bogus values just for testing */
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vals[0] = 777; /* next_pid_field */
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vals[1] = (u64)"hula hoops"; /* next_comm_field */
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vals[1] = (u64)(long)"hula hoops"; /* next_comm_field */
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vals[2] = 1000000; /* ts_ns */
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vals[3] = 1000; /* ts_ms */
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vals[4] = smp_processor_id(); /* cpu */
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vals[5] = (u64)"thneed"; /* my_string_field */
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vals[4] = raw_smp_processor_id(); /* cpu */
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vals[5] = (u64)(long)"thneed"; /* my_string_field */
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vals[6] = 598; /* my_int_field */
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/* Now generate a gen_synth_test event */
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@ -218,11 +218,11 @@ static int __init test_empty_synth_event(void)
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/* Create some bogus values just for testing */
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vals[0] = 777; /* next_pid_field */
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vals[1] = (u64)"tiddlywinks"; /* next_comm_field */
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vals[1] = (u64)(long)"tiddlywinks"; /* next_comm_field */
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vals[2] = 1000000; /* ts_ns */
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vals[3] = 1000; /* ts_ms */
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vals[4] = smp_processor_id(); /* cpu */
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vals[5] = (u64)"thneed_2.0"; /* my_string_field */
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vals[4] = raw_smp_processor_id(); /* cpu */
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vals[5] = (u64)(long)"thneed_2.0"; /* my_string_field */
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vals[6] = 399; /* my_int_field */
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/* Now trace an empty_synth_test event */
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|
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@ -290,11 +290,11 @@ static int __init test_create_synth_event(void)
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/* Create some bogus values just for testing */
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vals[0] = 777; /* next_pid_field */
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vals[1] = (u64)"tiddlywinks"; /* next_comm_field */
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vals[1] = (u64)(long)"tiddlywinks"; /* next_comm_field */
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vals[2] = 1000000; /* ts_ns */
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vals[3] = 1000; /* ts_ms */
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vals[4] = smp_processor_id(); /* cpu */
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vals[5] = (u64)"thneed"; /* my_string_field */
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vals[4] = raw_smp_processor_id(); /* cpu */
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vals[5] = (u64)(long)"thneed"; /* my_string_field */
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vals[6] = 398; /* my_int_field */
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/* Now generate a create_synth_test event */
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|
|
@ -330,7 +330,7 @@ static int __init test_add_next_synth_val(void)
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goto out;
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/* next_comm_field */
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ret = synth_event_add_next_val((u64)"slinky", &trace_state);
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ret = synth_event_add_next_val((u64)(long)"slinky", &trace_state);
|
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if (ret)
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goto out;
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|
|
@ -345,12 +345,12 @@ static int __init test_add_next_synth_val(void)
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goto out;
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/* cpu */
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ret = synth_event_add_next_val(smp_processor_id(), &trace_state);
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ret = synth_event_add_next_val(raw_smp_processor_id(), &trace_state);
|
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if (ret)
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goto out;
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|
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/* my_string_field */
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ret = synth_event_add_next_val((u64)"thneed_2.01", &trace_state);
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ret = synth_event_add_next_val((u64)(long)"thneed_2.01", &trace_state);
|
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if (ret)
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goto out;
|
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|
||||
|
|
@ -388,7 +388,7 @@ static int __init test_add_synth_val(void)
|
|||
if (ret)
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goto out;
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|
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ret = synth_event_add_val("cpu", smp_processor_id(), &trace_state);
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ret = synth_event_add_val("cpu", raw_smp_processor_id(), &trace_state);
|
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if (ret)
|
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goto out;
|
||||
|
||||
|
|
@ -396,12 +396,12 @@ static int __init test_add_synth_val(void)
|
|||
if (ret)
|
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goto out;
|
||||
|
||||
ret = synth_event_add_val("next_comm_field", (u64)"silly putty",
|
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ret = synth_event_add_val("next_comm_field", (u64)(long)"silly putty",
|
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&trace_state);
|
||||
if (ret)
|
||||
goto out;
|
||||
|
||||
ret = synth_event_add_val("my_string_field", (u64)"thneed_9",
|
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ret = synth_event_add_val("my_string_field", (u64)(long)"thneed_9",
|
||||
&trace_state);
|
||||
if (ret)
|
||||
goto out;
|
||||
|
|
@ -423,13 +423,13 @@ static int __init test_trace_synth_event(void)
|
|||
|
||||
/* Trace some bogus values just for testing */
|
||||
ret = synth_event_trace(create_synth_test, 7, /* number of values */
|
||||
444, /* next_pid_field */
|
||||
(u64)"clackers", /* next_comm_field */
|
||||
1000000, /* ts_ns */
|
||||
1000, /* ts_ms */
|
||||
smp_processor_id(), /* cpu */
|
||||
(u64)"Thneed", /* my_string_field */
|
||||
999); /* my_int_field */
|
||||
(u64)444, /* next_pid_field */
|
||||
(u64)(long)"clackers", /* next_comm_field */
|
||||
(u64)1000000, /* ts_ns */
|
||||
(u64)1000, /* ts_ms */
|
||||
(u64)raw_smp_processor_id(), /* cpu */
|
||||
(u64)(long)"Thneed", /* my_string_field */
|
||||
(u64)999); /* my_int_field */
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -1837,6 +1837,7 @@ static __init int init_trace_selftests(void)
|
|||
|
||||
pr_info("Running postponed tracer tests:\n");
|
||||
|
||||
tracing_selftest_running = true;
|
||||
list_for_each_entry_safe(p, n, &postponed_selftests, list) {
|
||||
/* This loop can take minutes when sanitizers are enabled, so
|
||||
* lets make sure we allow RCU processing.
|
||||
|
|
@ -1859,6 +1860,7 @@ static __init int init_trace_selftests(void)
|
|||
list_del(&p->list);
|
||||
kfree(p);
|
||||
}
|
||||
tracing_selftest_running = false;
|
||||
|
||||
out:
|
||||
mutex_unlock(&trace_types_lock);
|
||||
|
|
|
|||
|
|
@ -821,6 +821,29 @@ static const char *synth_field_fmt(char *type)
|
|||
return fmt;
|
||||
}
|
||||
|
||||
static void print_synth_event_num_val(struct trace_seq *s,
|
||||
char *print_fmt, char *name,
|
||||
int size, u64 val, char *space)
|
||||
{
|
||||
switch (size) {
|
||||
case 1:
|
||||
trace_seq_printf(s, print_fmt, name, (u8)val, space);
|
||||
break;
|
||||
|
||||
case 2:
|
||||
trace_seq_printf(s, print_fmt, name, (u16)val, space);
|
||||
break;
|
||||
|
||||
case 4:
|
||||
trace_seq_printf(s, print_fmt, name, (u32)val, space);
|
||||
break;
|
||||
|
||||
default:
|
||||
trace_seq_printf(s, print_fmt, name, val, space);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static enum print_line_t print_synth_event(struct trace_iterator *iter,
|
||||
int flags,
|
||||
struct trace_event *event)
|
||||
|
|
@ -859,10 +882,13 @@ static enum print_line_t print_synth_event(struct trace_iterator *iter,
|
|||
} else {
|
||||
struct trace_print_flags __flags[] = {
|
||||
__def_gfpflag_names, {-1, NULL} };
|
||||
char *space = (i == se->n_fields - 1 ? "" : " ");
|
||||
|
||||
trace_seq_printf(s, print_fmt, se->fields[i]->name,
|
||||
entry->fields[n_u64],
|
||||
i == se->n_fields - 1 ? "" : " ");
|
||||
print_synth_event_num_val(s, print_fmt,
|
||||
se->fields[i]->name,
|
||||
se->fields[i]->size,
|
||||
entry->fields[n_u64],
|
||||
space);
|
||||
|
||||
if (strcmp(se->fields[i]->type, "gfp_t") == 0) {
|
||||
trace_seq_puts(s, " (");
|
||||
|
|
@ -1805,6 +1831,8 @@ __synth_event_trace_start(struct trace_event_file *file,
|
|||
int entry_size, fields_size = 0;
|
||||
int ret = 0;
|
||||
|
||||
memset(trace_state, '\0', sizeof(*trace_state));
|
||||
|
||||
/*
|
||||
* Normal event tracing doesn't get called at all unless the
|
||||
* ENABLED bit is set (which attaches the probe thus allowing
|
||||
|
|
@ -1885,6 +1913,11 @@ int synth_event_trace(struct trace_event_file *file, unsigned int n_vals, ...)
|
|||
return ret;
|
||||
}
|
||||
|
||||
if (n_vals != state.event->n_fields) {
|
||||
ret = -EINVAL;
|
||||
goto out;
|
||||
}
|
||||
|
||||
va_start(args, n_vals);
|
||||
for (i = 0, n_u64 = 0; i < state.event->n_fields; i++) {
|
||||
u64 val;
|
||||
|
|
@ -1898,12 +1931,30 @@ int synth_event_trace(struct trace_event_file *file, unsigned int n_vals, ...)
|
|||
strscpy(str_field, str_val, STR_VAR_LEN_MAX);
|
||||
n_u64 += STR_VAR_LEN_MAX / sizeof(u64);
|
||||
} else {
|
||||
state.entry->fields[n_u64] = val;
|
||||
struct synth_field *field = state.event->fields[i];
|
||||
|
||||
switch (field->size) {
|
||||
case 1:
|
||||
*(u8 *)&state.entry->fields[n_u64] = (u8)val;
|
||||
break;
|
||||
|
||||
case 2:
|
||||
*(u16 *)&state.entry->fields[n_u64] = (u16)val;
|
||||
break;
|
||||
|
||||
case 4:
|
||||
*(u32 *)&state.entry->fields[n_u64] = (u32)val;
|
||||
break;
|
||||
|
||||
default:
|
||||
state.entry->fields[n_u64] = val;
|
||||
break;
|
||||
}
|
||||
n_u64++;
|
||||
}
|
||||
}
|
||||
va_end(args);
|
||||
|
||||
out:
|
||||
__synth_event_trace_end(&state);
|
||||
|
||||
return ret;
|
||||
|
|
@ -1942,6 +1993,11 @@ int synth_event_trace_array(struct trace_event_file *file, u64 *vals,
|
|||
return ret;
|
||||
}
|
||||
|
||||
if (n_vals != state.event->n_fields) {
|
||||
ret = -EINVAL;
|
||||
goto out;
|
||||
}
|
||||
|
||||
for (i = 0, n_u64 = 0; i < state.event->n_fields; i++) {
|
||||
if (state.event->fields[i]->is_string) {
|
||||
char *str_val = (char *)(long)vals[i];
|
||||
|
|
@ -1950,11 +2006,30 @@ int synth_event_trace_array(struct trace_event_file *file, u64 *vals,
|
|||
strscpy(str_field, str_val, STR_VAR_LEN_MAX);
|
||||
n_u64 += STR_VAR_LEN_MAX / sizeof(u64);
|
||||
} else {
|
||||
state.entry->fields[n_u64] = vals[i];
|
||||
struct synth_field *field = state.event->fields[i];
|
||||
u64 val = vals[i];
|
||||
|
||||
switch (field->size) {
|
||||
case 1:
|
||||
*(u8 *)&state.entry->fields[n_u64] = (u8)val;
|
||||
break;
|
||||
|
||||
case 2:
|
||||
*(u16 *)&state.entry->fields[n_u64] = (u16)val;
|
||||
break;
|
||||
|
||||
case 4:
|
||||
*(u32 *)&state.entry->fields[n_u64] = (u32)val;
|
||||
break;
|
||||
|
||||
default:
|
||||
state.entry->fields[n_u64] = val;
|
||||
break;
|
||||
}
|
||||
n_u64++;
|
||||
}
|
||||
}
|
||||
|
||||
out:
|
||||
__synth_event_trace_end(&state);
|
||||
|
||||
return ret;
|
||||
|
|
@ -1997,8 +2072,6 @@ int synth_event_trace_start(struct trace_event_file *file,
|
|||
if (!trace_state)
|
||||
return -EINVAL;
|
||||
|
||||
memset(trace_state, '\0', sizeof(*trace_state));
|
||||
|
||||
ret = __synth_event_trace_start(file, trace_state);
|
||||
if (ret == -ENOENT)
|
||||
ret = 0; /* just disabled, not really an error */
|
||||
|
|
@ -2069,8 +2142,25 @@ static int __synth_event_add_val(const char *field_name, u64 val,
|
|||
|
||||
str_field = (char *)&entry->fields[field->offset];
|
||||
strscpy(str_field, str_val, STR_VAR_LEN_MAX);
|
||||
} else
|
||||
entry->fields[field->offset] = val;
|
||||
} else {
|
||||
switch (field->size) {
|
||||
case 1:
|
||||
*(u8 *)&trace_state->entry->fields[field->offset] = (u8)val;
|
||||
break;
|
||||
|
||||
case 2:
|
||||
*(u16 *)&trace_state->entry->fields[field->offset] = (u16)val;
|
||||
break;
|
||||
|
||||
case 4:
|
||||
*(u32 *)&trace_state->entry->fields[field->offset] = (u32)val;
|
||||
break;
|
||||
|
||||
default:
|
||||
trace_state->entry->fields[field->offset] = val;
|
||||
break;
|
||||
}
|
||||
}
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -533,7 +533,7 @@ struct xbc_node *find_match_node(struct xbc_node *node, char *k)
|
|||
|
||||
static int __init __xbc_add_key(char *k)
|
||||
{
|
||||
struct xbc_node *node;
|
||||
struct xbc_node *node, *child;
|
||||
|
||||
if (!xbc_valid_keyword(k))
|
||||
return xbc_parse_error("Invalid keyword", k);
|
||||
|
|
@ -543,8 +543,12 @@ static int __init __xbc_add_key(char *k)
|
|||
|
||||
if (!last_parent) /* the first level */
|
||||
node = find_match_node(xbc_nodes, k);
|
||||
else
|
||||
node = find_match_node(xbc_node_get_child(last_parent), k);
|
||||
else {
|
||||
child = xbc_node_get_child(last_parent);
|
||||
if (child && xbc_node_is_value(child))
|
||||
return xbc_parse_error("Subkey is mixed with value", k);
|
||||
node = find_match_node(child, k);
|
||||
}
|
||||
|
||||
if (node)
|
||||
last_parent = node;
|
||||
|
|
@ -574,10 +578,10 @@ static int __init __xbc_parse_keys(char *k)
|
|||
return __xbc_add_key(k);
|
||||
}
|
||||
|
||||
static int __init xbc_parse_kv(char **k, char *v)
|
||||
static int __init xbc_parse_kv(char **k, char *v, int op)
|
||||
{
|
||||
struct xbc_node *prev_parent = last_parent;
|
||||
struct xbc_node *node;
|
||||
struct xbc_node *child;
|
||||
char *next;
|
||||
int c, ret;
|
||||
|
||||
|
|
@ -585,12 +589,19 @@ static int __init xbc_parse_kv(char **k, char *v)
|
|||
if (ret)
|
||||
return ret;
|
||||
|
||||
child = xbc_node_get_child(last_parent);
|
||||
if (child) {
|
||||
if (xbc_node_is_key(child))
|
||||
return xbc_parse_error("Value is mixed with subkey", v);
|
||||
else if (op == '=')
|
||||
return xbc_parse_error("Value is redefined", v);
|
||||
}
|
||||
|
||||
c = __xbc_parse_value(&v, &next);
|
||||
if (c < 0)
|
||||
return c;
|
||||
|
||||
node = xbc_add_sibling(v, XBC_VALUE);
|
||||
if (!node)
|
||||
if (!xbc_add_sibling(v, XBC_VALUE))
|
||||
return -ENOMEM;
|
||||
|
||||
if (c == ',') { /* Array */
|
||||
|
|
@ -763,7 +774,7 @@ int __init xbc_init(char *buf)
|
|||
|
||||
p = buf;
|
||||
do {
|
||||
q = strpbrk(p, "{}=;\n#");
|
||||
q = strpbrk(p, "{}=+;\n#");
|
||||
if (!q) {
|
||||
p = skip_spaces(p);
|
||||
if (*p != '\0')
|
||||
|
|
@ -774,8 +785,15 @@ int __init xbc_init(char *buf)
|
|||
c = *q;
|
||||
*q++ = '\0';
|
||||
switch (c) {
|
||||
case '+':
|
||||
if (*q++ != '=') {
|
||||
ret = xbc_parse_error("Wrong '+' operator",
|
||||
q - 2);
|
||||
break;
|
||||
}
|
||||
/* Fall through */
|
||||
case '=':
|
||||
ret = xbc_parse_kv(&p, q);
|
||||
ret = xbc_parse_kv(&p, q, c);
|
||||
break;
|
||||
case '{':
|
||||
ret = xbc_open_brace(&p, q);
|
||||
|
|
|
|||
|
|
@ -4,10 +4,7 @@
|
|||
|
||||
#include <stdio.h>
|
||||
|
||||
/* controllable printf */
|
||||
extern int pr_output;
|
||||
#define printk(fmt, ...) \
|
||||
(pr_output ? printf(fmt, ##__VA_ARGS__) : 0)
|
||||
#define printk(fmt, ...) printf(fmt, ##__VA_ARGS__)
|
||||
|
||||
#define pr_err printk
|
||||
#define pr_warn printk
|
||||
|
|
|
|||
|
|
@ -14,8 +14,6 @@
|
|||
#include <linux/kernel.h>
|
||||
#include <linux/bootconfig.h>
|
||||
|
||||
int pr_output = 1;
|
||||
|
||||
static int xbc_show_array(struct xbc_node *node)
|
||||
{
|
||||
const char *val;
|
||||
|
|
@ -131,15 +129,26 @@ int load_xbc_from_initrd(int fd, char **buf)
|
|||
struct stat stat;
|
||||
int ret;
|
||||
u32 size = 0, csum = 0, rcsum;
|
||||
char magic[BOOTCONFIG_MAGIC_LEN];
|
||||
|
||||
ret = fstat(fd, &stat);
|
||||
if (ret < 0)
|
||||
return -errno;
|
||||
|
||||
if (stat.st_size < 8)
|
||||
if (stat.st_size < 8 + BOOTCONFIG_MAGIC_LEN)
|
||||
return 0;
|
||||
|
||||
if (lseek(fd, -8, SEEK_END) < 0) {
|
||||
if (lseek(fd, -BOOTCONFIG_MAGIC_LEN, SEEK_END) < 0) {
|
||||
pr_err("Failed to lseek: %d\n", -errno);
|
||||
return -errno;
|
||||
}
|
||||
if (read(fd, magic, BOOTCONFIG_MAGIC_LEN) < 0)
|
||||
return -errno;
|
||||
/* Check the bootconfig magic bytes */
|
||||
if (memcmp(magic, BOOTCONFIG_MAGIC, BOOTCONFIG_MAGIC_LEN) != 0)
|
||||
return 0;
|
||||
|
||||
if (lseek(fd, -(8 + BOOTCONFIG_MAGIC_LEN), SEEK_END) < 0) {
|
||||
pr_err("Failed to lseek: %d\n", -errno);
|
||||
return -errno;
|
||||
}
|
||||
|
|
@ -150,11 +159,14 @@ int load_xbc_from_initrd(int fd, char **buf)
|
|||
if (read(fd, &csum, sizeof(u32)) < 0)
|
||||
return -errno;
|
||||
|
||||
/* Wrong size, maybe no boot config here */
|
||||
if (stat.st_size < size + 8)
|
||||
return 0;
|
||||
/* Wrong size error */
|
||||
if (stat.st_size < size + 8 + BOOTCONFIG_MAGIC_LEN) {
|
||||
pr_err("bootconfig size is too big\n");
|
||||
return -E2BIG;
|
||||
}
|
||||
|
||||
if (lseek(fd, stat.st_size - 8 - size, SEEK_SET) < 0) {
|
||||
if (lseek(fd, stat.st_size - (size + 8 + BOOTCONFIG_MAGIC_LEN),
|
||||
SEEK_SET) < 0) {
|
||||
pr_err("Failed to lseek: %d\n", -errno);
|
||||
return -errno;
|
||||
}
|
||||
|
|
@ -163,17 +175,17 @@ int load_xbc_from_initrd(int fd, char **buf)
|
|||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/* Wrong Checksum, maybe no boot config here */
|
||||
/* Wrong Checksum */
|
||||
rcsum = checksum((unsigned char *)*buf, size);
|
||||
if (csum != rcsum) {
|
||||
pr_err("checksum error: %d != %d\n", csum, rcsum);
|
||||
return 0;
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
ret = xbc_init(*buf);
|
||||
/* Wrong data, maybe no boot config here */
|
||||
/* Wrong data */
|
||||
if (ret < 0)
|
||||
return 0;
|
||||
return ret;
|
||||
|
||||
return size;
|
||||
}
|
||||
|
|
@ -213,20 +225,15 @@ int delete_xbc(const char *path)
|
|||
return -errno;
|
||||
}
|
||||
|
||||
/*
|
||||
* Suppress error messages in xbc_init() because it can be just a
|
||||
* data which concidentally matches the size and checksum footer.
|
||||
*/
|
||||
pr_output = 0;
|
||||
size = load_xbc_from_initrd(fd, &buf);
|
||||
pr_output = 1;
|
||||
if (size < 0) {
|
||||
ret = size;
|
||||
pr_err("Failed to load a boot config from initrd: %d\n", ret);
|
||||
} else if (size > 0) {
|
||||
ret = fstat(fd, &stat);
|
||||
if (!ret)
|
||||
ret = ftruncate(fd, stat.st_size - size - 8);
|
||||
ret = ftruncate(fd, stat.st_size
|
||||
- size - 8 - BOOTCONFIG_MAGIC_LEN);
|
||||
if (ret)
|
||||
ret = -errno;
|
||||
} /* Ignore if there is no boot config in initrd */
|
||||
|
|
@ -295,6 +302,12 @@ int apply_xbc(const char *path, const char *xbc_path)
|
|||
pr_err("Failed to apply a boot config: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
/* Write a magic word of the bootconfig */
|
||||
ret = write(fd, BOOTCONFIG_MAGIC, BOOTCONFIG_MAGIC_LEN);
|
||||
if (ret < 0) {
|
||||
pr_err("Failed to apply a boot config magic: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
close(fd);
|
||||
free(data);
|
||||
|
||||
|
|
|
|||
|
|
@ -0,0 +1,3 @@
|
|||
# value -> subkey pattern
|
||||
key = value
|
||||
key.subkey = another-value
|
||||
|
|
@ -0,0 +1,3 @@
|
|||
# subkey -> value pattern
|
||||
key.subkey = value
|
||||
key = another-value
|
||||
|
|
@ -0,0 +1,6 @@
|
|||
# Same key value is not allowed
|
||||
key {
|
||||
foo = value
|
||||
bar = value2
|
||||
}
|
||||
key.foo = value
|
||||
|
|
@ -9,7 +9,7 @@ TEMPCONF=`mktemp temp-XXXX.bconf`
|
|||
NG=0
|
||||
|
||||
cleanup() {
|
||||
rm -f $INITRD $TEMPCONF
|
||||
rm -f $INITRD $TEMPCONF $OUTFILE
|
||||
exit $NG
|
||||
}
|
||||
|
||||
|
|
@ -49,7 +49,7 @@ xpass $BOOTCONF -a $TEMPCONF $INITRD
|
|||
new_size=$(stat -c %s $INITRD)
|
||||
|
||||
echo "File size check"
|
||||
xpass test $new_size -eq $(expr $bconf_size + $initrd_size + 9)
|
||||
xpass test $new_size -eq $(expr $bconf_size + $initrd_size + 9 + 12)
|
||||
|
||||
echo "Apply command repeat test"
|
||||
xpass $BOOTCONF -a $TEMPCONF $INITRD
|
||||
|
|
@ -71,7 +71,6 @@ printf " \0\0\0 \0\0\0" >> $INITRD
|
|||
$BOOTCONF -a $TEMPCONF $INITRD > $OUTFILE 2>&1
|
||||
xfail grep -i "failed" $OUTFILE
|
||||
xfail grep -i "error" $OUTFILE
|
||||
rm $OUTFILE
|
||||
|
||||
echo "Max node number check"
|
||||
|
||||
|
|
@ -96,6 +95,19 @@ truncate -s 32764 $TEMPCONF
|
|||
echo "\"" >> $TEMPCONF # add 2 bytes + terminal ('\"\n\0')
|
||||
xpass $BOOTCONF -a $TEMPCONF $INITRD
|
||||
|
||||
echo "Adding same-key values"
|
||||
cat > $TEMPCONF << EOF
|
||||
key = bar, baz
|
||||
key += qux
|
||||
EOF
|
||||
echo > $INITRD
|
||||
|
||||
xpass $BOOTCONF -a $TEMPCONF $INITRD
|
||||
$BOOTCONF $INITRD > $OUTFILE
|
||||
xpass grep -q "bar" $OUTFILE
|
||||
xpass grep -q "baz" $OUTFILE
|
||||
xpass grep -q "qux" $OUTFILE
|
||||
|
||||
echo "=== expected failure cases ==="
|
||||
for i in samples/bad-* ; do
|
||||
xfail $BOOTCONF -a $i $INITRD
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче