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![Christoph Hellwig](/assets/img/avatar_default.png)
Use the move from Linux 2.6 to Linux 3.x as an excuse to kill the annoying subdirectories in the XFS source code. Besides the large amount of file rename the only changes are to the Makefile, a few files including headers with the subdirectory prefix, and the binary sysctl compat code that includes a header under fs/xfs/ from kernel/. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
160 lines
3.8 KiB
C
160 lines
3.8 KiB
C
#include <linux/stat.h>
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#include <linux/sysctl.h>
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#include "../fs/xfs/xfs_sysctl.h"
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#include <linux/sunrpc/debug.h>
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#include <linux/string.h>
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#include <net/ip_vs.h>
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static int sysctl_depth(struct ctl_table *table)
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{
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struct ctl_table *tmp;
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int depth;
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depth = 0;
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for (tmp = table; tmp->parent; tmp = tmp->parent)
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depth++;
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return depth;
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}
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static struct ctl_table *sysctl_parent(struct ctl_table *table, int n)
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{
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int i;
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for (i = 0; table && i < n; i++)
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table = table->parent;
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return table;
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}
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static void sysctl_print_path(struct ctl_table *table)
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{
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struct ctl_table *tmp;
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int depth, i;
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depth = sysctl_depth(table);
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if (table->procname) {
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for (i = depth; i >= 0; i--) {
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tmp = sysctl_parent(table, i);
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printk("/%s", tmp->procname?tmp->procname:"");
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}
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}
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printk(" ");
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}
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static struct ctl_table *sysctl_check_lookup(struct nsproxy *namespaces,
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struct ctl_table *table)
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{
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struct ctl_table_header *head;
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struct ctl_table *ref, *test;
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int depth, cur_depth;
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depth = sysctl_depth(table);
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for (head = __sysctl_head_next(namespaces, NULL); head;
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head = __sysctl_head_next(namespaces, head)) {
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cur_depth = depth;
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ref = head->ctl_table;
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repeat:
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test = sysctl_parent(table, cur_depth);
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for (; ref->procname; ref++) {
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int match = 0;
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if (cur_depth && !ref->child)
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continue;
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if (test->procname && ref->procname &&
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(strcmp(test->procname, ref->procname) == 0))
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match++;
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if (match) {
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if (cur_depth != 0) {
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cur_depth--;
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ref = ref->child;
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goto repeat;
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}
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goto out;
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}
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}
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}
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ref = NULL;
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out:
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sysctl_head_finish(head);
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return ref;
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}
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static void set_fail(const char **fail, struct ctl_table *table, const char *str)
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{
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if (*fail) {
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printk(KERN_ERR "sysctl table check failed: ");
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sysctl_print_path(table);
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printk(" %s\n", *fail);
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dump_stack();
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}
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*fail = str;
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}
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static void sysctl_check_leaf(struct nsproxy *namespaces,
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struct ctl_table *table, const char **fail)
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{
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struct ctl_table *ref;
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ref = sysctl_check_lookup(namespaces, table);
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if (ref && (ref != table))
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set_fail(fail, table, "Sysctl already exists");
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}
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int sysctl_check_table(struct nsproxy *namespaces, struct ctl_table *table)
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{
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int error = 0;
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for (; table->procname; table++) {
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const char *fail = NULL;
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if (table->parent) {
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if (!table->parent->procname)
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set_fail(&fail, table, "Parent without procname");
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}
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if (table->child) {
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if (table->data)
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set_fail(&fail, table, "Directory with data?");
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if (table->maxlen)
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set_fail(&fail, table, "Directory with maxlen?");
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if ((table->mode & (S_IRUGO|S_IXUGO)) != table->mode)
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set_fail(&fail, table, "Writable sysctl directory");
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if (table->proc_handler)
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set_fail(&fail, table, "Directory with proc_handler");
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if (table->extra1)
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set_fail(&fail, table, "Directory with extra1");
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if (table->extra2)
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set_fail(&fail, table, "Directory with extra2");
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} else {
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if ((table->proc_handler == proc_dostring) ||
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(table->proc_handler == proc_dointvec) ||
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(table->proc_handler == proc_dointvec_minmax) ||
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(table->proc_handler == proc_dointvec_jiffies) ||
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(table->proc_handler == proc_dointvec_userhz_jiffies) ||
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(table->proc_handler == proc_dointvec_ms_jiffies) ||
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(table->proc_handler == proc_doulongvec_minmax) ||
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(table->proc_handler == proc_doulongvec_ms_jiffies_minmax)) {
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if (!table->data)
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set_fail(&fail, table, "No data");
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if (!table->maxlen)
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set_fail(&fail, table, "No maxlen");
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}
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#ifdef CONFIG_PROC_SYSCTL
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if (!table->proc_handler)
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set_fail(&fail, table, "No proc_handler");
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#endif
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sysctl_check_leaf(namespaces, table, &fail);
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}
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if (table->mode > 0777)
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set_fail(&fail, table, "bogus .mode");
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if (fail) {
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set_fail(&fail, table, NULL);
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error = -EINVAL;
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}
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if (table->child)
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error |= sysctl_check_table(namespaces, table->child);
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}
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return error;
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}
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