diff options
Diffstat (limited to 'kernel/sysctl_check.c')
| -rw-r--r-- | kernel/sysctl_check.c | 160 |
1 files changed, 0 insertions, 160 deletions
diff --git a/kernel/sysctl_check.c b/kernel/sysctl_check.c deleted file mode 100644 index 362da653813d..000000000000 --- a/kernel/sysctl_check.c +++ /dev/null | |||
| @@ -1,160 +0,0 @@ | |||
| 1 | #include <linux/stat.h> | ||
| 2 | #include <linux/sysctl.h> | ||
| 3 | #include "../fs/xfs/xfs_sysctl.h" | ||
| 4 | #include <linux/sunrpc/debug.h> | ||
| 5 | #include <linux/string.h> | ||
| 6 | #include <net/ip_vs.h> | ||
| 7 | |||
| 8 | |||
| 9 | static int sysctl_depth(struct ctl_table *table) | ||
| 10 | { | ||
| 11 | struct ctl_table *tmp; | ||
| 12 | int depth; | ||
| 13 | |||
| 14 | depth = 0; | ||
| 15 | for (tmp = table; tmp->parent; tmp = tmp->parent) | ||
| 16 | depth++; | ||
| 17 | |||
| 18 | return depth; | ||
| 19 | } | ||
| 20 | |||
| 21 | static struct ctl_table *sysctl_parent(struct ctl_table *table, int n) | ||
| 22 | { | ||
| 23 | int i; | ||
| 24 | |||
| 25 | for (i = 0; table && i < n; i++) | ||
| 26 | table = table->parent; | ||
| 27 | |||
| 28 | return table; | ||
| 29 | } | ||
| 30 | |||
| 31 | |||
| 32 | static void sysctl_print_path(struct ctl_table *table) | ||
| 33 | { | ||
| 34 | struct ctl_table *tmp; | ||
| 35 | int depth, i; | ||
| 36 | depth = sysctl_depth(table); | ||
| 37 | if (table->procname) { | ||
| 38 | for (i = depth; i >= 0; i--) { | ||
| 39 | tmp = sysctl_parent(table, i); | ||
| 40 | printk("/%s", tmp->procname?tmp->procname:""); | ||
| 41 | } | ||
| 42 | } | ||
| 43 | printk(" "); | ||
| 44 | } | ||
| 45 | |||
| 46 | static struct ctl_table *sysctl_check_lookup(struct nsproxy *namespaces, | ||
| 47 | struct ctl_table *table) | ||
| 48 | { | ||
| 49 | struct ctl_table_header *head; | ||
| 50 | struct ctl_table *ref, *test; | ||
| 51 | int depth, cur_depth; | ||
| 52 | |||
| 53 | depth = sysctl_depth(table); | ||
| 54 | |||
| 55 | for (head = __sysctl_head_next(namespaces, NULL); head; | ||
| 56 | head = __sysctl_head_next(namespaces, head)) { | ||
| 57 | cur_depth = depth; | ||
| 58 | ref = head->ctl_table; | ||
| 59 | repeat: | ||
| 60 | test = sysctl_parent(table, cur_depth); | ||
| 61 | for (; ref->procname; ref++) { | ||
| 62 | int match = 0; | ||
| 63 | if (cur_depth && !ref->child) | ||
| 64 | continue; | ||
| 65 | |||
| 66 | if (test->procname && ref->procname && | ||
| 67 | (strcmp(test->procname, ref->procname) == 0)) | ||
| 68 | match++; | ||
| 69 | |||
| 70 | if (match) { | ||
| 71 | if (cur_depth != 0) { | ||
| 72 | cur_depth--; | ||
| 73 | ref = ref->child; | ||
| 74 | goto repeat; | ||
| 75 | } | ||
| 76 | goto out; | ||
| 77 | } | ||
| 78 | } | ||
| 79 | } | ||
| 80 | ref = NULL; | ||
| 81 | out: | ||
| 82 | sysctl_head_finish(head); | ||
| 83 | return ref; | ||
| 84 | } | ||
| 85 | |||
| 86 | static void set_fail(const char **fail, struct ctl_table *table, const char *str) | ||
| 87 | { | ||
| 88 | if (*fail) { | ||
| 89 | printk(KERN_ERR "sysctl table check failed: "); | ||
| 90 | sysctl_print_path(table); | ||
| 91 | printk(" %s\n", *fail); | ||
| 92 | dump_stack(); | ||
| 93 | } | ||
| 94 | *fail = str; | ||
| 95 | } | ||
| 96 | |||
| 97 | static void sysctl_check_leaf(struct nsproxy *namespaces, | ||
| 98 | struct ctl_table *table, const char **fail) | ||
| 99 | { | ||
| 100 | struct ctl_table *ref; | ||
| 101 | |||
| 102 | ref = sysctl_check_lookup(namespaces, table); | ||
| 103 | if (ref && (ref != table)) | ||
| 104 | set_fail(fail, table, "Sysctl already exists"); | ||
| 105 | } | ||
| 106 | |||
| 107 | int sysctl_check_table(struct nsproxy *namespaces, struct ctl_table *table) | ||
| 108 | { | ||
| 109 | int error = 0; | ||
| 110 | for (; table->procname; table++) { | ||
| 111 | const char *fail = NULL; | ||
| 112 | |||
| 113 | if (table->parent) { | ||
| 114 | if (!table->parent->procname) | ||
| 115 | set_fail(&fail, table, "Parent without procname"); | ||
| 116 | } | ||
| 117 | if (table->child) { | ||
| 118 | if (table->data) | ||
| 119 | set_fail(&fail, table, "Directory with data?"); | ||
| 120 | if (table->maxlen) | ||
| 121 | set_fail(&fail, table, "Directory with maxlen?"); | ||
| 122 | if ((table->mode & (S_IRUGO|S_IXUGO)) != table->mode) | ||
| 123 | set_fail(&fail, table, "Writable sysctl directory"); | ||
| 124 | if (table->proc_handler) | ||
| 125 | set_fail(&fail, table, "Directory with proc_handler"); | ||
| 126 | if (table->extra1) | ||
| 127 | set_fail(&fail, table, "Directory with extra1"); | ||
| 128 | if (table->extra2) | ||
| 129 | set_fail(&fail, table, "Directory with extra2"); | ||
| 130 | } else { | ||
| 131 | if ((table->proc_handler == proc_dostring) || | ||
| 132 | (table->proc_handler == proc_dointvec) || | ||
| 133 | (table->proc_handler == proc_dointvec_minmax) || | ||
| 134 | (table->proc_handler == proc_dointvec_jiffies) || | ||
| 135 | (table->proc_handler == proc_dointvec_userhz_jiffies) || | ||
| 136 | (table->proc_handler == proc_dointvec_ms_jiffies) || | ||
| 137 | (table->proc_handler == proc_doulongvec_minmax) || | ||
| 138 | (table->proc_handler == proc_doulongvec_ms_jiffies_minmax)) { | ||
| 139 | if (!table->data) | ||
| 140 | set_fail(&fail, table, "No data"); | ||
| 141 | if (!table->maxlen) | ||
| 142 | set_fail(&fail, table, "No maxlen"); | ||
| 143 | } | ||
| 144 | #ifdef CONFIG_PROC_SYSCTL | ||
| 145 | if (!table->proc_handler) | ||
| 146 | set_fail(&fail, table, "No proc_handler"); | ||
| 147 | #endif | ||
| 148 | sysctl_check_leaf(namespaces, table, &fail); | ||
| 149 | } | ||
| 150 | if (table->mode > 0777) | ||
| 151 | set_fail(&fail, table, "bogus .mode"); | ||
| 152 | if (fail) { | ||
| 153 | set_fail(&fail, table, NULL); | ||
| 154 | error = -EINVAL; | ||
| 155 | } | ||
| 156 | if (table->child) | ||
| 157 | error |= sysctl_check_table(namespaces, table->child); | ||
| 158 | } | ||
| 159 | return error; | ||
| 160 | } | ||