<div dir="ltr"><div dir="ltr"><div class="gmail_default" style="font-size:small"><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Nov 4, 2022 at 8:07 PM Martin Doucha <<a href="mailto:mdoucha@suse.cz">mdoucha@suse.cz</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Tests using the .save_restore functionality currently cannot run<br>
without root privileges at all because the test will write<br>
into the path at least at the end and trigger error, even when<br>
the config paths are flagged as optional.<br>
<br>
Introduce new tst_path_val field for flags and replace path prefix flags<br>
with bit flags. Also introduce new flags to control handling of read/write<br>
errors and read-only sysfiles and rewrite save_restore implementation<br>
accordingly.<br>
<br>
Signed-off-by: Martin Doucha <<a href="mailto:mdoucha@suse.cz" target="_blank">mdoucha@suse.cz</a>><br>
---<br>
<br>
This is technically a v2 for<br>
<a href="https://patchwork.ozlabs.org/project/ltp/patch/20221021155740.8339-1-mdoucha@suse.cz/" rel="noreferrer" target="_blank">https://patchwork.ozlabs.org/project/ltp/patch/20221021155740.8339-1-mdoucha@suse.cz/</a><br>
<br>
I'll send a follow-up patchset to replace setup() code which requires root<br>
privileges without good reason after this patch gets merged. Here I've kept<br>
test changes to the minimum needed to maintain current save_restore behavior<br>
with the new flags system. The only change in behavior is the use of read-only<br>
handling flags where it's clear that the change is desired.<br>
<br>
Though a few tests should get closer attention during review:<br>
- all KSM tests<br>
- add_key05<br>
- migrate_pages02<br>
<br>
doc/c-test-api.txt | 38 ++++----<br>
include/tst_sys_conf.h | 15 ++-<br>
lib/tst_sys_conf.c | 97 ++++++++++++-------<br>
lib/tst_test.c | 3 +-<br>
testcases/cve/icmp_rate_limit01.c | 2 +-<br>
testcases/kernel/containers/userns/userns08.c | 2 +-<br>
testcases/kernel/kvm/kvm_pagefault01.c | 3 +-<br>
testcases/kernel/mem/ksm/ksm01.c | 10 +-<br>
testcases/kernel/mem/ksm/ksm02.c | 10 +-<br>
testcases/kernel/mem/ksm/ksm03.c | 10 +-<br>
testcases/kernel/mem/ksm/ksm04.c | 10 +-<br>
testcases/kernel/mem/ksm/ksm05.c | 2 +-<br>
testcases/kernel/mem/ksm/ksm06.c | 9 +-<br>
testcases/kernel/syscalls/add_key/add_key05.c | 7 +-<br>
testcases/kernel/syscalls/bind/bind06.c | 2 +-<br>
testcases/kernel/syscalls/fork/fork13.c | 2 +-<br>
.../kernel/syscalls/ipc/msgget/msgget03.c | 2 +-<br>
testcases/kernel/syscalls/madvise/madvise06.c | 2 +-<br>
testcases/kernel/syscalls/madvise/madvise08.c | 2 +-<br>
.../syscalls/migrate_pages/migrate_pages02.c | 2 +-<br>
testcases/kernel/syscalls/sendto/sendto03.c | 2 +-<br>
.../kernel/syscalls/setsockopt/setsockopt05.c | 2 +-<br>
.../kernel/syscalls/setsockopt/setsockopt06.c | 2 +-<br>
.../kernel/syscalls/setsockopt/setsockopt07.c | 2 +-<br>
.../kernel/syscalls/setsockopt/setsockopt08.c | 2 +-<br>
.../kernel/syscalls/setsockopt/setsockopt09.c | 2 +-<br>
testcases/kernel/syscalls/syslog/syslog11.c | 2 +-<br>
27 files changed, 142 insertions(+), 102 deletions(-)<br>
<br>
diff --git a/doc/c-test-api.txt b/doc/c-test-api.txt<br>
index e4c66b492..dbca6266b 100644<br>
--- a/doc/c-test-api.txt<br>
+++ b/doc/c-test-api.txt<br>
@@ -1602,35 +1602,33 @@ LTP library can be instructed to save and restore value of specified<br>
field 'save_restore'. It is a NULL-terminated array of struct<br>
'tst_path_val' where each tst_path_val.path represents a file, whose<br>
value is saved at the beginning and restored at the end of the test.<br>
-If non-NULL value is passed it is written to the respective file at<br>
-the beginning of the test. Only the first line of a specified file<br>
-is saved and restored.<br>
-<br>
-Pathnames can be optionally prefixed to specify how strictly (during<br>
-'store') are handled errors:<br>
-<br>
-* (no prefix) - test ends with 'TCONF', if file doesn't exist<br>
-* '?' - test prints info message and continues,<br>
- if file doesn't exist or open/read fails<br>
-* '!' - test ends with 'TBROK', if file doesn't exist<br>
+If non-NULL string is passed in tst_path_val.val, it is written<br>
+to the respective file at the beginning of the test. Only the first line<br>
+of a specified file is saved and restored.<br>
+<br>
+By default, the test will end with TCONF if the file is read-only or<br>
+does not exist. If the optional write of new value fails, the test will end<br>
+with 'TBROK'. This behavior can be changed using tst_path_val.flags:<br>
+<br>
+* 'TST_SR_FAIL_MISSING' – End test with 'TBROK' if the file does not exist<br>
+* 'TST_SR_IGNORE_MISSING' – Continue without saving the file if it does not exist<br>
+* 'TST_SR_FAIL_RO' – End test with 'TBROK' if the file is read-only<br>
+* 'TST_SR_IGNORE_RO' – Continue without saving the file if it is read-only<br>
+* 'TST_SR_IGNORE_ERR' – Ignore errors when writing new value into the file<br>
+* 'TST_SR_REQUIRED' – Equivalent to 'TST_SR_FAIL_MISSING | TST_SR_FAIL_RO'<br>
+* 'TST_SR_IF_ACCESS' – Equivalent to 'TST_SR_IGNORE_MISSING | TST_SR_IGNORE_RO'<br>
<br>
'restore' is always strict and will TWARN if it encounters any error.<br>
<br>
[source,c]<br>
-------------------------------------------------------------------------------<br>
-static void setup(void)<br>
-{<br>
- FILE_PRINTF("/proc/sys/kernel/core_pattern", "/mypath");<br>
- SAFE_TRY_FILE_PRINTF("/proc/sys/user/max_user_namespaces", "%d", 10);<br>
-}<br>
-<br>
static struct tst_test test = {<br>
...<br>
.setup = setup,<br>
.save_restore = (const struct tst_path_val[]) {<br>
- {"/proc/sys/kernel/core_pattern", NULL},<br>
- {"?/proc/sys/user/max_user_namespaces", NULL},<br>
- {"!/sys/kernel/mm/ksm/run", "1"},<br>
+ {"/proc/sys/kernel/core_pattern", NULL, 0},<br>
+ {"/proc/sys/user/max_user_namespaces", NULL, TST_SR_IF_ACCESS},<br>
+ {"/sys/kernel/mm/ksm/run", "1", TST_SR_REQUIRED},<br>
{}<br>
},<br>
};<br>
diff --git a/include/tst_sys_conf.h b/include/tst_sys_conf.h<br>
index b7bbe36fc..a87f4e1cd 100644<br>
--- a/include/tst_sys_conf.h<br>
+++ b/include/tst_sys_conf.h<br>
@@ -5,14 +5,23 @@<br>
#ifndef TST_SYS_CONF_H__<br>
#define TST_SYS_CONF_H__<br>
<br>
+#define TST_SR_FAIL_MISSING 0x1<br>
+#define TST_SR_IGNORE_MISSING 0x2<br>
+#define TST_SR_FAIL_RO 0x4<br>
+#define TST_SR_IGNORE_RO 0x8<br>
+#define TST_SR_IGNORE_ERR 0x10<br></blockquote><div><br></div><div><div class="gmail_default" style="font-size:small">This is a good thought to split the permission and respectively</div><div class="gmail_default" style="font-size:small">handle them, but I feel that these names are a bit ambiguous.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">For example TST_SR_IGNORE_RO, I was puzzled a while when</div><div class="gmail_default" style="font-size:small">reading it in the below code, it can be thought of as ignoring the</div><div class="gmail_default" style="font-size:small">READ_ONLY permission if just from the literal meaning.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">We need to find more precise names.</div><br></div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
+<br>
+#define TST_SR_REQUIRED (TST_SR_FAIL_MISSING | TST_SR_FAIL_RO)<br>
+#define TST_SR_IF_ACCESS (TST_SR_IGNORE_MISSING | TST_SR_IGNORE_RO)<br></blockquote><div><br></div><div><div class="gmail_default" style="font-size:small">Here as well, especially these two will be more frequently used in testcase writing.</div></div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
+<br>
struct tst_path_val {<br>
const char *path;<br>
const char *val;<br>
+ unsigned int flags;<br>
};<br>
<br>
-int tst_sys_conf_save_str(const char *path, const char *value);<br>
-int tst_sys_conf_save(const char *path);<br></blockquote><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
-void tst_sys_conf_set(const char *path, const char *value);<br></blockquote><div> </div><div><div class="gmail_default" style="font-size:small">I made it an external function for wide use by users, but seems</div><div class="gmail_default" style="font-size:small">that's a bit redundant, we have SAFE_FILE_PRINTF instead,</div><div class="gmail_default" style="font-size:small">so here I'm OK with removing it.</div><br></div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
+void tst_sys_conf_save_str(const char *path, const char *value);<br></blockquote><div><br></div><div><div class="gmail_default" style="font-size:small">Do we have any other place to use tst_sys_conf_save_str?</div><div class="gmail_default" style="font-size:small">If no, I would suggest declaring it only as a static function</div><div class="gmail_default" style="font-size:small">in the tst_sys_conf.c</div><br></div><div><div class="gmail_default" style="font-size:small">Anyway, the basic method of this patch is what I liked, and</div><div class="gmail_default" style="font-size:small">the rest part (+ fixed with Jan's comments) looks good.</div><div class="gmail_default" style="font-size:small"><br></div><br></div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
+int tst_sys_conf_save(const struct tst_path_val *conf);<br>
void tst_sys_conf_restore(int verbose);<br>
void tst_sys_conf_dump(void);<br>
<br>
diff --git a/lib/tst_sys_conf.c b/lib/tst_sys_conf.c<br>
index 003698825..3bf5c25fb 100644<br>
--- a/lib/tst_sys_conf.c<br>
+++ b/lib/tst_sys_conf.c<br>
@@ -20,6 +20,14 @@ struct tst_sys_conf {<br>
<br>
static struct tst_sys_conf *save_restore_data;<br>
<br>
+static void print_error(int info_only, const char *err, const char *path)<br>
+{<br>
+ if (info_only)<br>
+ tst_res(TINFO, err, path);<br>
+ else<br>
+ tst_brk(TBROK | TERRNO, err, path);<br>
+}<br>
+<br>
void tst_sys_conf_dump(void)<br>
{<br>
struct tst_sys_conf *i;<br>
@@ -28,7 +36,7 @@ void tst_sys_conf_dump(void)<br>
tst_res(TINFO, "%s = %s", i->path, i->value);<br>
}<br>
<br>
-int tst_sys_conf_save_str(const char *path, const char *value)<br>
+void tst_sys_conf_save_str(const char *path, const char *value)<br>
{<br>
struct tst_sys_conf *n = SAFE_MALLOC(sizeof(*n));<br>
<br>
@@ -40,45 +48,43 @@ int tst_sys_conf_save_str(const char *path, const char *value)<br>
<br>
n->next = save_restore_data;<br>
save_restore_data = n;<br>
-<br>
- return 0;<br>
}<br>
<br>
-int tst_sys_conf_save(const char *path)<br>
+int tst_sys_conf_save(const struct tst_path_val *conf)<br>
{<br>
char line[PATH_MAX];<br>
+ int ttype, iret;<br>
FILE *fp;<br>
void *ret;<br>
- char flag;<br>
<br>
- if (!path)<br>
+ if (!conf || !conf->path)<br>
tst_brk(TBROK, "path is empty");<br>
<br>
- flag = path[0];<br>
- if (flag == '?' || flag == '!')<br>
- path++;<br>
-<br>
- if (access(path, F_OK) != 0) {<br>
- switch (flag) {<br>
- case '?':<br>
- tst_res(TINFO, "Path not found: '%s'", path);<br>
- break;<br>
- case '!':<br>
- tst_brk(TBROK|TERRNO, "Path not found: '%s'", path);<br>
- break;<br>
- default:<br>
- tst_brk(TCONF|TERRNO, "Path not found: '%s'", path);<br>
+ if (access(conf->path, F_OK) != 0) {<br>
+ if (conf->flags & TST_SR_IGNORE_MISSING) {<br>
+ tst_res(TINFO, "Path not found: %s", conf->path);<br>
+ return 1;<br>
}<br>
- return 1;<br>
+<br>
+ ttype = (conf->flags & TST_SR_FAIL_MISSING) ? TBROK : TCONF;<br>
+ tst_brk(ttype | TERRNO, "Path not found: %s", conf->path);<br>
}<br>
<br>
- fp = fopen(path, "r");<br>
- if (fp == NULL) {<br>
- if (flag == '?')<br>
+ if (access(conf->path, W_OK) != 0) {<br>
+ if (conf->flags & TST_SR_IGNORE_RO) {<br>
+ tst_res(TINFO, "Path is not writable: %s", conf->path);<br>
return 1;<br>
+ }<br>
<br>
- tst_brk(TBROK | TERRNO, "Failed to open FILE '%s' for reading",<br>
- path);<br>
+ ttype = (conf->flags & TST_SR_FAIL_RO) ? TBROK : TCONF;<br>
+ tst_brk(ttype | TERRNO, "Path is not writable: %s", conf->path);<br>
+ }<br>
+<br>
+ fp = fopen(conf->path, "r");<br>
+<br>
+ if (fp == NULL) {<br>
+ print_error(conf->flags & TST_SR_IGNORE_ERR,<br>
+ "Failed to open '%s' for reading", conf->path);<br>
return 1;<br>
}<br>
<br>
@@ -86,24 +92,41 @@ int tst_sys_conf_save(const char *path)<br>
fclose(fp);<br>
<br>
if (ret == NULL) {<br>
- if (flag == '?')<br>
+ if (conf->flags & TST_SR_IGNORE_ERR)<br>
return 1;<br>
<br>
tst_brk(TBROK | TERRNO, "Failed to read anything from '%s'",<br>
- path);<br>
+ conf->path);<br>
}<br>
<br>
- return tst_sys_conf_save_str(path, line);<br>
-}<br>
+ tst_sys_conf_save_str(conf->path, line);<br>
<br>
-void tst_sys_conf_set(const char *path, const char *value)<br>
-{<br>
- char flag = path[0];<br>
- if (flag == '?' || flag == '!')<br>
- path++;<br>
+ if (!conf->val)<br>
+ return 0;<br>
+<br>
+ fp = fopen(conf->path, "w");<br>
+<br>
+ if (fp == NULL) {<br>
+ print_error(conf->flags & TST_SR_IGNORE_ERR,<br>
+ "Failed to open '%s' for writing", conf->path);<br>
+ return 0;<br>
+ }<br>
+<br>
+ iret = fputs(conf->val, fp);<br>
<br>
- if (value)<br>
- SAFE_FILE_PRINTF(path, "%s", value);<br>
+ if (iret < 0) {<br>
+ print_error(conf->flags & TST_SR_IGNORE_ERR,<br>
+ "Failed to write into '%s'", conf->path);<br>
+ }<br>
+<br>
+ iret = fclose(fp);<br>
+<br>
+ if (iret < 0) {<br>
+ print_error(conf->flags & TST_SR_IGNORE_ERR,<br>
+ "Failed to close '%s'", conf->path);<br>
+ }<br>
+<br>
+ return 0;<br>
}<br>
<br>
void tst_sys_conf_restore(int verbose)<br>
diff --git a/lib/tst_test.c b/lib/tst_test.c<br>
index 8ccde1629..366f67e44 100644<br>
--- a/lib/tst_test.c<br>
+++ b/lib/tst_test.c<br>
@@ -1181,8 +1181,7 @@ static void do_setup(int argc, char *argv[])<br>
const struct tst_path_val *pvl = tst_test->save_restore;<br>
<br>
while (pvl->path) {<br>
- if (!tst_sys_conf_save(pvl->path))<br>
- tst_sys_conf_set(pvl->path, pvl->val);<br>
+ tst_sys_conf_save(pvl);<br>
pvl++;<br>
}<br>
}<br>
diff --git a/testcases/cve/icmp_rate_limit01.c b/testcases/cve/icmp_rate_limit01.c<br>
index 1263762d2..23fd6560c 100644<br>
--- a/testcases/cve/icmp_rate_limit01.c<br>
+++ b/testcases/cve/icmp_rate_limit01.c<br>
@@ -269,7 +269,7 @@ static struct tst_test test = {<br>
NULL<br>
},<br>
.save_restore = (const struct tst_path_val[]) {<br>
- {"?/proc/sys/user/max_user_namespaces", NULL},<br>
+ {"/proc/sys/user/max_user_namespaces", NULL, TST_SR_IF_ACCESS},<br>
{}<br>
},<br>
.tags = (const struct tst_tag[]) {<br>
diff --git a/testcases/kernel/containers/userns/userns08.c b/testcases/kernel/containers/userns/userns08.c<br>
index 0f1cb54a9..3d060a548 100644<br>
--- a/testcases/kernel/containers/userns/userns08.c<br>
+++ b/testcases/kernel/containers/userns/userns08.c<br>
@@ -135,7 +135,7 @@ static struct tst_test test = {<br>
NULL<br>
},<br>
.save_restore = (const struct tst_path_val[]) {<br>
- {"?/proc/sys/user/max_user_namespaces", NULL},<br>
+ {"/proc/sys/user/max_user_namespaces", NULL, TST_SR_IF_ACCESS},<br>
{}<br>
},<br>
.tags = (const struct tst_tag[]) {<br>
diff --git a/testcases/kernel/kvm/kvm_pagefault01.c b/testcases/kernel/kvm/kvm_pagefault01.c<br>
index e355fa448..7f33f42ce 100644<br>
--- a/testcases/kernel/kvm/kvm_pagefault01.c<br>
+++ b/testcases/kernel/kvm/kvm_pagefault01.c<br>
@@ -217,7 +217,8 @@ static struct tst_test test = {<br>
.cleanup = tst_kvm_cleanup,<br>
.needs_root = 1,<br>
.save_restore = (const struct tst_path_val[]) {<br>
- {"?/sys/module/kvm/parameters/tdp_mmu", "0"},<br>
+ {"/sys/module/kvm/parameters/tdp_mmu", "0",<br>
+ TST_SR_IGNORE_MISSING},<br>
{}<br>
},<br>
.supported_archs = (const char *const []) {<br>
diff --git a/testcases/kernel/mem/ksm/ksm01.c b/testcases/kernel/mem/ksm/ksm01.c<br>
index 1f3852fc3..e9e5356fd 100644<br>
--- a/testcases/kernel/mem/ksm/ksm01.c<br>
+++ b/testcases/kernel/mem/ksm/ksm01.c<br>
@@ -80,10 +80,12 @@ static struct tst_test test = {<br>
},<br>
.setup = setup,<br>
.save_restore = (const struct tst_path_val[]) {<br>
- {"!/sys/kernel/mm/ksm/run", NULL},<br>
- {"!/sys/kernel/mm/ksm/sleep_millisecs", NULL},<br>
- {"?/sys/kernel/mm/ksm/max_page_sharing", NULL},<br>
- {"?/sys/kernel/mm/ksm/merge_across_nodes", "1"},<br>
+ {"/sys/kernel/mm/ksm/run", NULL, TST_SR_REQUIRED},<br>
+ {"/sys/kernel/mm/ksm/sleep_millisecs", NULL, TST_SR_REQUIRED},<br>
+ {"/sys/kernel/mm/ksm/max_page_sharing", NULL,<br>
+ TST_SR_IGNORE_MISSING},<br>
+ {"/sys/kernel/mm/ksm/merge_across_nodes", "1",<br>
+ TST_SR_IGNORE_MISSING},<br>
{}<br>
},<br>
.needs_kconfigs = (const char *const[]){<br>
diff --git a/testcases/kernel/mem/ksm/ksm02.c b/testcases/kernel/mem/ksm/ksm02.c<br>
index 4183108d5..8e5c97235 100644<br>
--- a/testcases/kernel/mem/ksm/ksm02.c<br>
+++ b/testcases/kernel/mem/ksm/ksm02.c<br>
@@ -101,10 +101,12 @@ static struct tst_test test = {<br>
},<br>
.setup = setup,<br>
.save_restore = (const struct tst_path_val[]) {<br>
- {"!/sys/kernel/mm/ksm/run", NULL},<br>
- {"!/sys/kernel/mm/ksm/sleep_millisecs", NULL},<br>
- {"?/sys/kernel/mm/ksm/max_page_sharing", NULL},<br>
- {"?/sys/kernel/mm/ksm/merge_across_nodes", "1"},<br>
+ {"/sys/kernel/mm/ksm/run", NULL, TST_SR_REQUIRED},<br>
+ {"/sys/kernel/mm/ksm/sleep_millisecs", NULL, TST_SR_REQUIRED},<br>
+ {"/sys/kernel/mm/ksm/max_page_sharing", NULL,<br>
+ TST_SR_IGNORE_MISSING},<br>
+ {"/sys/kernel/mm/ksm/merge_across_nodes", "1",<br>
+ TST_SR_IGNORE_MISSING},<br>
{}<br>
},<br>
.needs_kconfigs = (const char *const[]){<br>
diff --git a/testcases/kernel/mem/ksm/ksm03.c b/testcases/kernel/mem/ksm/ksm03.c<br>
index 1cf2e4954..1af47f678 100644<br>
--- a/testcases/kernel/mem/ksm/ksm03.c<br>
+++ b/testcases/kernel/mem/ksm/ksm03.c<br>
@@ -83,10 +83,12 @@ static struct tst_test test = {<br>
},<br>
.setup = setup,<br>
.save_restore = (const struct tst_path_val[]) {<br>
- {"!/sys/kernel/mm/ksm/run", NULL},<br>
- {"!/sys/kernel/mm/ksm/sleep_millisecs", NULL},<br>
- {"?/sys/kernel/mm/ksm/max_page_sharing", NULL},<br>
- {"?/sys/kernel/mm/ksm/merge_across_nodes", "1"},<br>
+ {"/sys/kernel/mm/ksm/run", NULL, TST_SR_REQUIRED},<br>
+ {"/sys/kernel/mm/ksm/sleep_millisecs", NULL, TST_SR_REQUIRED},<br>
+ {"/sys/kernel/mm/ksm/max_page_sharing", NULL,<br>
+ TST_SR_IGNORE_MISSING},<br>
+ {"/sys/kernel/mm/ksm/merge_across_nodes", "1",<br>
+ TST_SR_IGNORE_MISSING},<br>
{}<br>
},<br>
.needs_kconfigs = (const char *const[]){<br>
diff --git a/testcases/kernel/mem/ksm/ksm04.c b/testcases/kernel/mem/ksm/ksm04.c<br>
index 9fe9d6dd5..8d1caafa4 100644<br>
--- a/testcases/kernel/mem/ksm/ksm04.c<br>
+++ b/testcases/kernel/mem/ksm/ksm04.c<br>
@@ -103,10 +103,12 @@ static struct tst_test test = {<br>
},<br>
.setup = setup,<br>
.save_restore = (const struct tst_path_val[]) {<br>
- {"!/sys/kernel/mm/ksm/run", NULL},<br>
- {"!/sys/kernel/mm/ksm/sleep_millisecs", NULL},<br>
- {"?/sys/kernel/mm/ksm/max_page_sharing", NULL},<br>
- {"?/sys/kernel/mm/ksm/merge_across_nodes", "1"},<br>
+ {"/sys/kernel/mm/ksm/run", NULL, TST_SR_REQUIRED},<br>
+ {"/sys/kernel/mm/ksm/sleep_millisecs", NULL, TST_SR_REQUIRED},<br>
+ {"/sys/kernel/mm/ksm/max_page_sharing", NULL,<br>
+ TST_SR_IGNORE_MISSING},<br>
+ {"/sys/kernel/mm/ksm/merge_across_nodes", "1",<br>
+ TST_SR_IGNORE_MISSING},<br>
{}<br>
},<br>
.needs_kconfigs = (const char *const[]){<br>
diff --git a/testcases/kernel/mem/ksm/ksm05.c b/testcases/kernel/mem/ksm/ksm05.c<br>
index 146a9a3b7..8ea9bd187 100644<br>
--- a/testcases/kernel/mem/ksm/ksm05.c<br>
+++ b/testcases/kernel/mem/ksm/ksm05.c<br>
@@ -89,7 +89,7 @@ static struct tst_test test = {<br>
.test_all = test_ksm,<br>
.min_kver = "2.6.32",<br>
.save_restore = (const struct tst_path_val[]) {<br>
- {"!/sys/kernel/mm/ksm/run", "1"},<br>
+ {"/sys/kernel/mm/ksm/run", "1", TST_SR_REQUIRED},<br>
{}<br>
},<br>
.needs_kconfigs = (const char *const[]){<br>
diff --git a/testcases/kernel/mem/ksm/ksm06.c b/testcases/kernel/mem/ksm/ksm06.c<br>
index 21c82edc1..539b3c833 100644<br>
--- a/testcases/kernel/mem/ksm/ksm06.c<br>
+++ b/testcases/kernel/mem/ksm/ksm06.c<br>
@@ -137,10 +137,11 @@ static struct tst_test test = {<br>
},<br>
.setup = setup,<br>
.save_restore = (const struct tst_path_val[]) {<br>
- {"?/sys/kernel/mm/ksm/max_page_sharing", NULL},<br>
- {"!/sys/kernel/mm/ksm/run", NULL},<br>
- {"!/sys/kernel/mm/ksm/sleep_millisecs", NULL},<br>
- {"/sys/kernel/mm/ksm/merge_across_nodes", NULL},<br>
+ {"/sys/kernel/mm/ksm/max_page_sharing", NULL,<br>
+ TST_SR_IGNORE_MISSING},<br>
+ {"/sys/kernel/mm/ksm/run", NULL, TST_SR_REQUIRED},<br>
+ {"/sys/kernel/mm/ksm/sleep_millisecs", NULL, TST_SR_REQUIRED},<br>
+ {"/sys/kernel/mm/ksm/merge_across_nodes", NULL, 0},<br>
{}<br>
},<br>
.needs_kconfigs = (const char *const[]){<br>
diff --git a/testcases/kernel/syscalls/add_key/add_key05.c b/testcases/kernel/syscalls/add_key/add_key05.c<br>
index 63cb262bb..9ae95b18a 100644<br>
--- a/testcases/kernel/syscalls/add_key/add_key05.c<br>
+++ b/testcases/kernel/syscalls/add_key/add_key05.c<br>
@@ -220,9 +220,10 @@ static struct tst_test test = {<br>
.forks_child = 1,<br>
.cleanup = cleanup,<br>
.save_restore = (const struct tst_path_val[]) {<br>
- {"?/proc/sys/kernel/keys/gc_delay", "1"},<br>
- {"?/proc/sys/kernel/keys/maxkeys", "200"},<br>
- {"?/proc/sys/kernel/keys/maxbytes", "20000"},<br>
+ {"/proc/sys/kernel/keys/gc_delay", "1", TST_SR_IGNORE_MISSING},<br>
+ {"/proc/sys/kernel/keys/maxkeys", "200", TST_SR_IGNORE_MISSING},<br>
+ {"/proc/sys/kernel/keys/maxbytes", "20000",<br>
+ TST_SR_IGNORE_MISSING},<br>
{}<br>
},<br>
.bufs = (struct tst_buffers []) {<br>
diff --git a/testcases/kernel/syscalls/bind/bind06.c b/testcases/kernel/syscalls/bind/bind06.c<br>
index 618cfce46..6ef72db93 100644<br>
--- a/testcases/kernel/syscalls/bind/bind06.c<br>
+++ b/testcases/kernel/syscalls/bind/bind06.c<br>
@@ -110,7 +110,7 @@ static struct tst_test test = {<br>
NULL<br>
},<br>
.save_restore = (const struct tst_path_val[]) {<br>
- {"?/proc/sys/user/max_user_namespaces", NULL},<br>
+ {"/proc/sys/user/max_user_namespaces", NULL, TST_SR_IF_ACCESS},<br>
{}<br>
},<br>
.tags = (const struct tst_tag[]) {<br>
diff --git a/testcases/kernel/syscalls/fork/fork13.c b/testcases/kernel/syscalls/fork/fork13.c<br>
index fe30d1e9c..baa1825ae 100644<br>
--- a/testcases/kernel/syscalls/fork/fork13.c<br>
+++ b/testcases/kernel/syscalls/fork/fork13.c<br>
@@ -113,7 +113,7 @@ static struct tst_test test = {<br>
.max_runtime = 600,<br>
.test_all = check,<br>
.save_restore = (const struct tst_path_val[]) {<br>
- {"!/proc/sys/kernel/pid_max", PID_MAX_STR},<br>
+ {"/proc/sys/kernel/pid_max", PID_MAX_STR, TST_SR_REQUIRED},<br>
{}<br>
},<br>
.tags = (const struct tst_tag[]) {<br>
diff --git a/testcases/kernel/syscalls/ipc/msgget/msgget03.c b/testcases/kernel/syscalls/ipc/msgget/msgget03.c<br>
index 2257ae0f9..272e58e3a 100644<br>
--- a/testcases/kernel/syscalls/ipc/msgget/msgget03.c<br>
+++ b/testcases/kernel/syscalls/ipc/msgget/msgget03.c<br>
@@ -76,7 +76,7 @@ static struct tst_test test = {<br>
.cleanup = cleanup,<br>
.test_all = verify_msgget,<br>
.save_restore = (const struct tst_path_val[]){<br>
- {"/proc/sys/kernel/msgmni", NULL},<br>
+ {"/proc/sys/kernel/msgmni", NULL, 0},<br>
{}<br>
}<br>
};<br>
diff --git a/testcases/kernel/syscalls/madvise/madvise06.c b/testcases/kernel/syscalls/madvise/madvise06.c<br>
index 27aff18f1..37e7f72ab 100644<br>
--- a/testcases/kernel/syscalls/madvise/madvise06.c<br>
+++ b/testcases/kernel/syscalls/madvise/madvise06.c<br>
@@ -239,7 +239,7 @@ static struct tst_test test = {<br>
.needs_tmpdir = 1,<br>
.needs_root = 1,<br>
.save_restore = (const struct tst_path_val[]) {<br>
- {"?/proc/sys/vm/swappiness", NULL},<br>
+ {"/proc/sys/vm/swappiness", NULL, TST_SR_IGNORE_MISSING},<br>
{}<br>
},<br>
.needs_cgroup_ctrls = (const char *const []){ "memory", NULL },<br>
diff --git a/testcases/kernel/syscalls/madvise/madvise08.c b/testcases/kernel/syscalls/madvise/madvise08.c<br>
index 10549f4b4..75d76f725 100644<br>
--- a/testcases/kernel/syscalls/madvise/madvise08.c<br>
+++ b/testcases/kernel/syscalls/madvise/madvise08.c<br>
@@ -213,7 +213,7 @@ static struct tst_test test = {<br>
.needs_root = 1,<br>
.forks_child = 1,<br>
.save_restore = (const struct tst_path_val[]) {<br>
- {CORE_PATTERN, NULL},<br>
+ {CORE_PATTERN, NULL, 0},<br>
{}<br>
},<br>
};<br>
diff --git a/testcases/kernel/syscalls/migrate_pages/migrate_pages02.c b/testcases/kernel/syscalls/migrate_pages/migrate_pages02.c<br>
index 32da57042..78a4c39bf 100644<br>
--- a/testcases/kernel/syscalls/migrate_pages/migrate_pages02.c<br>
+++ b/testcases/kernel/syscalls/migrate_pages/migrate_pages02.c<br>
@@ -327,7 +327,7 @@ static struct tst_test test = {<br>
.test_all = run,<br>
.setup = setup,<br>
.save_restore = (const struct tst_path_val[]) {<br>
- {"?/proc/sys/kernel/numa_balancing", "0"},<br>
+ {"/proc/sys/kernel/numa_balancing", "0", TST_SR_IGNORE_MISSING},<br>
{}<br>
},<br>
};<br>
diff --git a/testcases/kernel/syscalls/sendto/sendto03.c b/testcases/kernel/syscalls/sendto/sendto03.c<br>
index 5d2c1e112..6ff7934c9 100644<br>
--- a/testcases/kernel/syscalls/sendto/sendto03.c<br>
+++ b/testcases/kernel/syscalls/sendto/sendto03.c<br>
@@ -218,7 +218,7 @@ static struct tst_test test = {<br>
NULL<br>
},<br>
.save_restore = (const struct tst_path_val[]) {<br>
- {"?/proc/sys/user/max_user_namespaces", NULL},<br>
+ {"/proc/sys/user/max_user_namespaces", NULL, TST_SR_IF_ACCESS},<br>
{}<br>
},<br>
.tags = (const struct tst_tag[]) {<br>
diff --git a/testcases/kernel/syscalls/setsockopt/setsockopt05.c b/testcases/kernel/syscalls/setsockopt/setsockopt05.c<br>
index 651583fb6..97876a4d4 100644<br>
--- a/testcases/kernel/syscalls/setsockopt/setsockopt05.c<br>
+++ b/testcases/kernel/syscalls/setsockopt/setsockopt05.c<br>
@@ -102,7 +102,7 @@ static struct tst_test test = {<br>
NULL<br>
},<br>
.save_restore = (const struct tst_path_val[]) {<br>
- {"?/proc/sys/user/max_user_namespaces", NULL},<br>
+ {"/proc/sys/user/max_user_namespaces", NULL, TST_SR_IF_ACCESS},<br>
{}<br>
},<br>
.tags = (const struct tst_tag[]) {<br>
diff --git a/testcases/kernel/syscalls/setsockopt/setsockopt06.c b/testcases/kernel/syscalls/setsockopt/setsockopt06.c<br>
index 9c818646b..84e318f51 100644<br>
--- a/testcases/kernel/syscalls/setsockopt/setsockopt06.c<br>
+++ b/testcases/kernel/syscalls/setsockopt/setsockopt06.c<br>
@@ -130,7 +130,7 @@ static struct tst_test test = {<br>
NULL<br>
},<br>
.save_restore = (const struct tst_path_val[]) {<br>
- {"?/proc/sys/user/max_user_namespaces", NULL},<br>
+ {"/proc/sys/user/max_user_namespaces", NULL, TST_SR_IF_ACCESS},<br>
{}<br>
},<br>
.tags = (const struct tst_tag[]) {<br>
diff --git a/testcases/kernel/syscalls/setsockopt/setsockopt07.c b/testcases/kernel/syscalls/setsockopt/setsockopt07.c<br>
index 616159a90..e208800e2 100644<br>
--- a/testcases/kernel/syscalls/setsockopt/setsockopt07.c<br>
+++ b/testcases/kernel/syscalls/setsockopt/setsockopt07.c<br>
@@ -143,7 +143,7 @@ static struct tst_test test = {<br>
NULL<br>
},<br>
.save_restore = (const struct tst_path_val[]) {<br>
- {"?/proc/sys/user/max_user_namespaces", NULL},<br>
+ {"/proc/sys/user/max_user_namespaces", NULL, TST_SR_IF_ACCESS},<br>
{}<br>
},<br>
.tags = (const struct tst_tag[]) {<br>
diff --git a/testcases/kernel/syscalls/setsockopt/setsockopt08.c b/testcases/kernel/syscalls/setsockopt/setsockopt08.c<br>
index 563444635..35724d94d 100644<br>
--- a/testcases/kernel/syscalls/setsockopt/setsockopt08.c<br>
+++ b/testcases/kernel/syscalls/setsockopt/setsockopt08.c<br>
@@ -159,7 +159,7 @@ static struct tst_test test = {<br>
NULL<br>
},<br>
.save_restore = (const struct tst_path_val[]) {<br>
- {"?/proc/sys/user/max_user_namespaces", NULL},<br>
+ {"/proc/sys/user/max_user_namespaces", NULL, TST_SR_IF_ACCESS},<br>
{}<br>
},<br>
.tags = (const struct tst_tag[]) {<br>
diff --git a/testcases/kernel/syscalls/setsockopt/setsockopt09.c b/testcases/kernel/syscalls/setsockopt/setsockopt09.c<br>
index 98f7fd00e..a5ac58389 100644<br>
--- a/testcases/kernel/syscalls/setsockopt/setsockopt09.c<br>
+++ b/testcases/kernel/syscalls/setsockopt/setsockopt09.c<br>
@@ -124,7 +124,7 @@ static struct tst_test test = {<br>
NULL<br>
},<br>
.save_restore = (const struct tst_path_val[]) {<br>
- {"?/proc/sys/user/max_user_namespaces", NULL},<br>
+ {"/proc/sys/user/max_user_namespaces", NULL, TST_SR_IF_ACCESS},<br>
{}<br>
},<br>
.tags = (const struct tst_tag[]) {<br>
diff --git a/testcases/kernel/syscalls/syslog/syslog11.c b/testcases/kernel/syscalls/syslog/syslog11.c<br>
index ca1ecbbe3..01a5eefa9 100644<br>
--- a/testcases/kernel/syscalls/syslog/syslog11.c<br>
+++ b/testcases/kernel/syscalls/syslog/syslog11.c<br>
@@ -58,7 +58,7 @@ static void run(unsigned int n)<br>
static struct tst_test test = {<br>
.test = run,<br>
.save_restore = (const struct tst_path_val[]) {<br>
- {"!/proc/sys/kernel/printk", NULL},<br>
+ {"/proc/sys/kernel/printk", NULL, TST_SR_REQUIRED},<br>
{}<br>
},<br>
.needs_root = 1,<br>
-- <br>
2.37.3<br>
<br>
<br>
-- <br>
Mailing list info: <a href="https://lists.linux.it/listinfo/ltp" rel="noreferrer" target="_blank">https://lists.linux.it/listinfo/ltp</a><br>
</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div>Regards,<br></div><div>Li Wang<br></div></div></div></div>