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Merge tag 'sysctl-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux

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Pull sysctl updates from Luis Chamberlain:
 "For two kernel releases now kernel/sysctl.c has been being cleaned up
  slowly, since the tables were grossly long, sprinkled with tons of
  #ifdefs and all this caused merge conflicts with one susbystem or
  another.

  This tree was put together to help try to avoid conflicts with these
  cleanups going on different trees at time. So nothing exciting on this
  pull request, just cleanups.

  Thanks a lot to the Uniontech and Huawei folks for doing some of this
  nasty work"

* tag 'sysctl-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux: (28 commits)
  sched: Fix build warning without CONFIG_SYSCTL
  reboot: Fix build warning without CONFIG_SYSCTL
  kernel/kexec_core: move kexec_core sysctls into its own file
  sysctl: minor cleanup in new_dir()
  ftrace: fix building with SYSCTL=y but DYNAMIC_FTRACE=n
  fs/proc: Introduce list_for_each_table_entry for proc sysctl
  mm: fix unused variable kernel warning when SYSCTL=n
  latencytop: move sysctl to its own file
  ftrace: fix building with SYSCTL=n but DYNAMIC_FTRACE=y
  ftrace: Fix build warning
  ftrace: move sysctl_ftrace_enabled to ftrace.c
  kernel/do_mount_initrd: move real_root_dev sysctls to its own file
  kernel/delayacct: move delayacct sysctls to its own file
  kernel/acct: move acct sysctls to its own file
  kernel/panic: move panic sysctls to its own file
  kernel/lockdep: move lockdep sysctls to its own file
  mm: move page-writeback sysctls to their own file
  mm: move oom_kill sysctls to their own file
  kernel/reboot: move reboot sysctls to its own file
  sched: Move energy_aware sysctls to topology.c
  ...
This commit is contained in:
Linus Torvalds
2022-05-26 16:57:20 -07:00
parent cdeffe87f7 494dcdf46e
commit 44d35720c9
31 changed files with 741 additions and 610 deletions
Download Patch File Download Diff File Expand all files Collapse all files

87
fs/proc/proc_sysctl.c
View File

@ -19,6 +19,9 @@
#include <linux/kmemleak.h>
#include "internal.h"
#define list_for_each_table_entry(entry, table) \
for ((entry) = (table); (entry)->procname; (entry)++)
static const struct dentry_operations proc_sys_dentry_operations;
static const struct file_operations proc_sys_file_operations;
static const struct inode_operations proc_sys_inode_operations;
@ -215,15 +218,19 @@ static void init_header(struct ctl_table_header *head,
INIT_HLIST_HEAD(&head->inodes);
if (node) {
struct ctl_table *entry;
for (entry = table; entry->procname; entry++, node++)
list_for_each_table_entry(entry, table) {
node->header = head;
node++;
}
}
}
static void erase_header(struct ctl_table_header *head)
{
struct ctl_table *entry;
for (entry = head->ctl_table; entry->procname; entry++)
list_for_each_table_entry(entry, head->ctl_table)
erase_entry(head, entry);
}
@ -248,7 +255,7 @@ static int insert_header(struct ctl_dir *dir, struct ctl_table_header *header)
err = insert_links(header);
if (err)
goto fail_links;
for (entry = header->ctl_table; entry->procname; entry++) {
list_for_each_table_entry(entry, header->ctl_table) {
err = insert_entry(header, entry);
if (err)
goto fail;
@ -978,7 +985,6 @@ static struct ctl_dir *new_dir(struct ctl_table_set *set,
table = (struct ctl_table *)(node + 1);
new_name = (char *)(table + 2);
memcpy(new_name, name, namelen);
new_name[namelen] = '\0';
table[0].procname = new_name;
table[0].mode = S_IFDIR|S_IRUGO|S_IXUGO;
init_header(&new->header, set->dir.header.root, set, node, table);
@ -1130,35 +1136,36 @@ static int sysctl_check_table_array(const char *path, struct ctl_table *table)
static int sysctl_check_table(const char *path, struct ctl_table *table)
{
struct ctl_table *entry;
int err = 0;
for (; table->procname; table++) {
if (table->child)
err |= sysctl_err(path, table, "Not a file");
list_for_each_table_entry(entry, table) {
if (entry->child)
err |= sysctl_err(path, entry, "Not a file");
if ((table->proc_handler == proc_dostring) ||
(table->proc_handler == proc_dointvec) ||
(table->proc_handler == proc_douintvec) ||
(table->proc_handler == proc_douintvec_minmax) ||
(table->proc_handler == proc_dointvec_minmax) ||
(table->proc_handler == proc_dou8vec_minmax) ||
(table->proc_handler == proc_dointvec_jiffies) ||
(table->proc_handler == proc_dointvec_userhz_jiffies) ||
(table->proc_handler == proc_dointvec_ms_jiffies) ||
(table->proc_handler == proc_doulongvec_minmax) ||
(table->proc_handler == proc_doulongvec_ms_jiffies_minmax)) {
if (!table->data)
err |= sysctl_err(path, table, "No data");
if (!table->maxlen)
err |= sysctl_err(path, table, "No maxlen");
if ((entry->proc_handler == proc_dostring) ||
(entry->proc_handler == proc_dointvec) ||
(entry->proc_handler == proc_douintvec) ||
(entry->proc_handler == proc_douintvec_minmax) ||
(entry->proc_handler == proc_dointvec_minmax) ||
(entry->proc_handler == proc_dou8vec_minmax) ||
(entry->proc_handler == proc_dointvec_jiffies) ||
(entry->proc_handler == proc_dointvec_userhz_jiffies) ||
(entry->proc_handler == proc_dointvec_ms_jiffies) ||
(entry->proc_handler == proc_doulongvec_minmax) ||
(entry->proc_handler == proc_doulongvec_ms_jiffies_minmax)) {
if (!entry->data)
err |= sysctl_err(path, entry, "No data");
if (!entry->maxlen)
err |= sysctl_err(path, entry, "No maxlen");
else
err |= sysctl_check_table_array(path, table);
err |= sysctl_check_table_array(path, entry);
}
if (!table->proc_handler)
err |= sysctl_err(path, table, "No proc_handler");
if (!entry->proc_handler)
err |= sysctl_err(path, entry, "No proc_handler");
if ((table->mode & (S_IRUGO|S_IWUGO)) != table->mode)
err |= sysctl_err(path, table, "bogus .mode 0%o",
table->mode);
if ((entry->mode & (S_IRUGO|S_IWUGO)) != entry->mode)
err |= sysctl_err(path, entry, "bogus .mode 0%o",
entry->mode);
}
return err;
}
@ -1174,7 +1181,7 @@ static struct ctl_table_header *new_links(struct ctl_dir *dir, struct ctl_table
name_bytes = 0;
nr_entries = 0;
for (entry = table; entry->procname; entry++) {
list_for_each_table_entry(entry, table) {
nr_entries++;
name_bytes += strlen(entry->procname) + 1;
}
@ -1191,14 +1198,16 @@ static struct ctl_table_header *new_links(struct ctl_dir *dir, struct ctl_table
node = (struct ctl_node *)(links + 1);
link_table = (struct ctl_table *)(node + nr_entries);
link_name = (char *)&link_table[nr_entries + 1];
link = link_table;
for (link = link_table, entry = table; entry->procname; link++, entry++) {
list_for_each_table_entry(entry, table) {
int len = strlen(entry->procname) + 1;
memcpy(link_name, entry->procname, len);
link->procname = link_name;
link->mode = S_IFLNK|S_IRWXUGO;
link->data = link_root;
link_name += len;
link++;
}
init_header(links, dir->header.root, dir->header.set, node, link_table);
links->nreg = nr_entries;
@ -1213,7 +1222,7 @@ static bool get_links(struct ctl_dir *dir,
struct ctl_table *entry, *link;
/* Are there links available for every entry in table? */
for (entry = table; entry->procname; entry++) {
list_for_each_table_entry(entry, table) {
const char *procname = entry->procname;
link = find_entry(&head, dir, procname, strlen(procname));
if (!link)
@ -1226,7 +1235,7 @@ static bool get_links(struct ctl_dir *dir,
}
/* The checks passed. Increase the registration count on the links */
for (entry = table; entry->procname; entry++) {
list_for_each_table_entry(entry, table) {
const char *procname = entry->procname;
link = find_entry(&head, dir, procname, strlen(procname));
head->nreg++;
@ -1329,7 +1338,7 @@ struct ctl_table_header *__register_sysctl_table(
struct ctl_node *node;
int nr_entries = 0;
for (entry = table; entry->procname; entry++)
list_for_each_table_entry(entry, table)
nr_entries++;
header = kzalloc(sizeof(struct ctl_table_header) +
@ -1456,7 +1465,7 @@ static int count_subheaders(struct ctl_table *table)
if (!table || !table->procname)
return 1;
for (entry = table; entry->procname; entry++) {
list_for_each_table_entry(entry, table) {
if (entry->child)
nr_subheaders += count_subheaders(entry->child);
else
@ -1475,7 +1484,7 @@ static int register_leaf_sysctl_tables(const char *path, char *pos,
int nr_dirs = 0;
int err = -ENOMEM;
for (entry = table; entry->procname; entry++) {
list_for_each_table_entry(entry, table) {
if (entry->child)
nr_dirs++;
else
@ -1492,7 +1501,9 @@ static int register_leaf_sysctl_tables(const char *path, char *pos,
goto out;
ctl_table_arg = files;
for (new = files, entry = table; entry->procname; entry++) {
new = files;
list_for_each_table_entry(entry, table) {
if (entry->child)
continue;
*new = *entry;
@ -1516,7 +1527,7 @@ static int register_leaf_sysctl_tables(const char *path, char *pos,
}
/* Recurse into the subdirectories. */
for (entry = table; entry->procname; entry++) {
list_for_each_table_entry(entry, table) {
char *child_pos;
if (!entry->child)
@ -1670,7 +1681,7 @@ static void put_links(struct ctl_table_header *header)
if (IS_ERR(core_parent))
return;
for (entry = header->ctl_table; entry->procname; entry++) {
list_for_each_table_entry(entry, header->ctl_table) {
struct ctl_table_header *link_head;
struct ctl_table *link;
const char *name = entry->procname;