#include <linux/dirent.h>
#include <linux/smp_lock.h>
#include <linux/buffer_head.h>
+#include <linux/compat.h>
#include <asm/uaccess.h>
static inline loff_t fat_make_i_pos(struct super_block *sb,
EXPORT_SYMBOL_GPL(fat_search_long);
struct fat_ioctl_filldir_callback {
- struct dirent __user *dirent;
+ void __user *dirent;
int result;
/* for dir ioctl */
const char *longname;
if (!memcmp(de->name, MSDOS_DOT, MSDOS_NAME))
inum = inode->i_ino;
else if (!memcmp(de->name, MSDOS_DOTDOT, MSDOS_NAME)) {
- inum = parent_ino(filp->f_dentry);
+ inum = parent_ino(filp->f_path.dentry);
} else {
loff_t i_pos = fat_make_i_pos(sb, bh, de);
struct inode *tmp = fat_iget(sb, i_pos);
static int fat_readdir(struct file *filp, void *dirent, filldir_t filldir)
{
- struct inode *inode = filp->f_dentry->d_inode;
+ struct inode *inode = filp->f_path.dentry->d_inode;
return __fat_readdir(inode, filp, dirent, filldir, 0, 0);
}
-static int fat_ioctl_filldir(void *__buf, const char *name, int name_len,
- loff_t offset, ino_t ino, unsigned int d_type)
+#define FAT_IOCTL_FILLDIR_FUNC(func, dirent_type) \
+static int func(void *__buf, const char *name, int name_len, \
+ loff_t offset, u64 ino, unsigned int d_type) \
+{ \
+ struct fat_ioctl_filldir_callback *buf = __buf; \
+ struct dirent_type __user *d1 = buf->dirent; \
+ struct dirent_type __user *d2 = d1 + 1; \
+ \
+ if (buf->result) \
+ return -EINVAL; \
+ buf->result++; \
+ \
+ if (name != NULL) { \
+ /* dirent has only short name */ \
+ if (name_len >= sizeof(d1->d_name)) \
+ name_len = sizeof(d1->d_name) - 1; \
+ \
+ if (put_user(0, d2->d_name) || \
+ put_user(0, &d2->d_reclen) || \
+ copy_to_user(d1->d_name, name, name_len) || \
+ put_user(0, d1->d_name + name_len) || \
+ put_user(name_len, &d1->d_reclen)) \
+ goto efault; \
+ } else { \
+ /* dirent has short and long name */ \
+ const char *longname = buf->longname; \
+ int long_len = buf->long_len; \
+ const char *shortname = buf->shortname; \
+ int short_len = buf->short_len; \
+ \
+ if (long_len >= sizeof(d1->d_name)) \
+ long_len = sizeof(d1->d_name) - 1; \
+ if (short_len >= sizeof(d1->d_name)) \
+ short_len = sizeof(d1->d_name) - 1; \
+ \
+ if (copy_to_user(d2->d_name, longname, long_len) || \
+ put_user(0, d2->d_name + long_len) || \
+ put_user(long_len, &d2->d_reclen) || \
+ put_user(ino, &d2->d_ino) || \
+ put_user(offset, &d2->d_off) || \
+ copy_to_user(d1->d_name, shortname, short_len) || \
+ put_user(0, d1->d_name + short_len) || \
+ put_user(short_len, &d1->d_reclen)) \
+ goto efault; \
+ } \
+ return 0; \
+efault: \
+ buf->result = -EFAULT; \
+ return -EFAULT; \
+}
+
+FAT_IOCTL_FILLDIR_FUNC(fat_ioctl_filldir, dirent)
+
+static int fat_ioctl_readdir(struct inode *inode, struct file *filp,
+ void __user *dirent, filldir_t filldir,
+ int short_only, int both)
{
- struct fat_ioctl_filldir_callback *buf = __buf;
- struct dirent __user *d1 = buf->dirent;
- struct dirent __user *d2 = d1 + 1;
-
- if (buf->result)
- return -EINVAL;
- buf->result++;
-
- if (name != NULL) {
- /* dirent has only short name */
- if (name_len >= sizeof(d1->d_name))
- name_len = sizeof(d1->d_name) - 1;
-
- if (put_user(0, d2->d_name) ||
- put_user(0, &d2->d_reclen) ||
- copy_to_user(d1->d_name, name, name_len) ||
- put_user(0, d1->d_name + name_len) ||
- put_user(name_len, &d1->d_reclen))
- goto efault;
- } else {
- /* dirent has short and long name */
- const char *longname = buf->longname;
- int long_len = buf->long_len;
- const char *shortname = buf->shortname;
- int short_len = buf->short_len;
-
- if (long_len >= sizeof(d1->d_name))
- long_len = sizeof(d1->d_name) - 1;
- if (short_len >= sizeof(d1->d_name))
- short_len = sizeof(d1->d_name) - 1;
-
- if (copy_to_user(d2->d_name, longname, long_len) ||
- put_user(0, d2->d_name + long_len) ||
- put_user(long_len, &d2->d_reclen) ||
- put_user(ino, &d2->d_ino) ||
- put_user(offset, &d2->d_off) ||
- copy_to_user(d1->d_name, shortname, short_len) ||
- put_user(0, d1->d_name + short_len) ||
- put_user(short_len, &d1->d_reclen))
- goto efault;
+ struct fat_ioctl_filldir_callback buf;
+ int ret;
+
+ buf.dirent = dirent;
+ buf.result = 0;
+ mutex_lock(&inode->i_mutex);
+ ret = -ENOENT;
+ if (!IS_DEADDIR(inode)) {
+ ret = __fat_readdir(inode, filp, &buf, filldir,
+ short_only, both);
}
- return 0;
-efault:
- buf->result = -EFAULT;
- return -EFAULT;
+ mutex_unlock(&inode->i_mutex);
+ if (ret >= 0)
+ ret = buf.result;
+ return ret;
}
-static int fat_dir_ioctl(struct inode * inode, struct file * filp,
- unsigned int cmd, unsigned long arg)
+static int fat_dir_ioctl(struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long arg)
{
- struct fat_ioctl_filldir_callback buf;
- struct dirent __user *d1;
- int ret, short_only, both;
+ struct dirent __user *d1 = (struct dirent __user *)arg;
+ int short_only, both;
switch (cmd) {
case VFAT_IOCTL_READDIR_SHORT:
return fat_generic_ioctl(inode, filp, cmd, arg);
}
- d1 = (struct dirent __user *)arg;
if (!access_ok(VERIFY_WRITE, d1, sizeof(struct dirent[2])))
return -EFAULT;
/*
if (put_user(0, &d1->d_reclen))
return -EFAULT;
- buf.dirent = d1;
- buf.result = 0;
- mutex_lock(&inode->i_mutex);
- ret = -ENOENT;
- if (!IS_DEADDIR(inode)) {
- ret = __fat_readdir(inode, filp, &buf, fat_ioctl_filldir,
- short_only, both);
+ return fat_ioctl_readdir(inode, filp, d1, fat_ioctl_filldir,
+ short_only, both);
+}
+
+#ifdef CONFIG_COMPAT
+#define VFAT_IOCTL_READDIR_BOTH32 _IOR('r', 1, struct compat_dirent[2])
+#define VFAT_IOCTL_READDIR_SHORT32 _IOR('r', 2, struct compat_dirent[2])
+
+FAT_IOCTL_FILLDIR_FUNC(fat_compat_ioctl_filldir, compat_dirent)
+
+static long fat_compat_dir_ioctl(struct file *filp, unsigned cmd,
+ unsigned long arg)
+{
+ struct inode *inode = filp->f_path.dentry->d_inode;
+ struct compat_dirent __user *d1 = compat_ptr(arg);
+ int short_only, both;
+
+ switch (cmd) {
+ case VFAT_IOCTL_READDIR_SHORT32:
+ short_only = 1;
+ both = 0;
+ break;
+ case VFAT_IOCTL_READDIR_BOTH32:
+ short_only = 0;
+ both = 1;
+ break;
+ default:
+ return -ENOIOCTLCMD;
}
- mutex_unlock(&inode->i_mutex);
- if (ret >= 0)
- ret = buf.result;
- return ret;
+
+ if (!access_ok(VERIFY_WRITE, d1, sizeof(struct compat_dirent[2])))
+ return -EFAULT;
+ /*
+ * Yes, we don't need this put_user() absolutely. However old
+ * code didn't return the right value. So, app use this value,
+ * in order to check whether it is EOF.
+ */
+ if (put_user(0, &d1->d_reclen))
+ return -EFAULT;
+
+ return fat_ioctl_readdir(inode, filp, d1, fat_compat_ioctl_filldir,
+ short_only, both);
}
+#endif /* CONFIG_COMPAT */
const struct file_operations fat_dir_operations = {
.read = generic_read_dir,
.readdir = fat_readdir,
.ioctl = fat_dir_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = fat_compat_dir_ioctl,
+#endif
.fsync = file_fsync,
};
git.openpandora.org / pandora-kernel.git / blobdiff