forbid_api.c File Reference

#include "forbid_api.h"
#include "config.h"
#include "ulist.h"

Include dependency graph for forbid_api.c:

Go to the source code of this file.

Functions
int	forbid_init (void)
void	forbid_exit (void)
int	forbid_file (const char *path)
int	unforbid_file (const char *path)
static char *	get_abs_path (const char __user *u_path, char *buf, int buflen)
int	forbid_contains (const char __user *u_path)
int	forbid_contains_str (const char *k_path)
int	forbid_list_get (char *buf, size_t buf_size)

Variables
struct ulist	forbid_list

Function Documentation

forbid_contains()

int forbid_contains

(

const char __user *

u_path

)

Definition at line 81 of file forbid_api.c.

                                               {
    char *buf;
    char *full;
    int blocked = 0;
 
    if (!u_path)
        return 0;
 
    buf = kmalloc(PATH_MAX, GFP_KERNEL);
    if (!buf)
        return 0;
 
    full = get_abs_path(u_path, buf, PATH_MAX);
    if (full) {
        blocked = ulist_contains(&forbid_list, full);
    }
 
    kfree(buf);
    return blocked;
}

forbid_contains_str()

int forbid_contains_str

(

const char *

k_path

)

Definition at line 102 of file forbid_api.c.

                                            {
    return ulist_contains(&forbid_list, k_path);
}

forbid_exit()

void forbid_exit

(

void

)

Definition at line 19 of file forbid_api.c.

                       {
    ulist_save(&forbid_list);
    ulist_clear(&forbid_list);
}

forbid_file()

int forbid_file

(

const char *

path

)

Definition at line 24 of file forbid_api.c.

                                  {
    int ret;
    char modpath[256];
 
    if (strcmp(path, "/") == 0)
        return -EINVAL;
 
    if (strlen(path) >= sizeof(modpath))
        return -ENAMETOOLONG;
    strscpy(modpath, path, sizeof(modpath));
 
    size_t len = strlen(modpath);
    if (len > 1 && modpath[len - 1] == '/') {
        modpath[len - 1] = '\0';
    }
 
    ret = ulist_add(&forbid_list, modpath, 0, NULL);
    if (ret < 0)
        return ret;
 
    ret = ulist_save(&forbid_list);
    if (ret < 0)
        return ret;
 
    return SUCCESS;
}

forbid_init()

int forbid_init

(

void

)

Definition at line 8 of file forbid_api.c.

                      {
    int ret;
 
    ulist_init(&forbid_list, FORBID_CFG_FILE);
    ret = ulist_load(&forbid_list);
    if (ret < 0)
        return ret;
 
    return SUCCESS;
}

forbid_list_get()

int forbid_list_get	(	char *	buf,
		size_t	buf_size
	)

Definition at line 106 of file forbid_api.c.

                                                {
    return ulist_list(&forbid_list, buf, buf_size);
}

get_abs_path()

static char * get_abs_path ( const char __user *  u_path, char *  buf, int  buflen  )

static

Definition at line 65 of file forbid_api.c.

                                                                            {
    struct path path;
    char *full;
    int err;
 
    err = user_path_at(AT_FDCWD, u_path, LOOKUP_FOLLOW, &path);
    if (err)
        return NULL;
 
    full = d_path(&path, buf, buflen);
    path_put(&path);
    if (IS_ERR(full))
        return NULL;
    return full;
}

unforbid_file()

int unforbid_file

(

const char *

path

)

Definition at line 51 of file forbid_api.c.

                                    {
    int ret;
 
    ret = ulist_remove(&forbid_list, path);
    if (ret < 0)
        return ret;
 
    ret = ulist_save(&forbid_list);
    if (ret < 0)
        return ret;
 
    return SUCCESS;
}

Variable Documentation

forbid_list

struct ulist forbid_list

Definition at line 6 of file forbid_api.c.