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Diffstat (limited to 'ANDROID_3.4.5/fs/readdir.c')
-rw-r--r--ANDROID_3.4.5/fs/readdir.c311
1 files changed, 0 insertions, 311 deletions
diff --git a/ANDROID_3.4.5/fs/readdir.c b/ANDROID_3.4.5/fs/readdir.c
deleted file mode 100644
index cc0a8227..00000000
--- a/ANDROID_3.4.5/fs/readdir.c
+++ /dev/null
@@ -1,311 +0,0 @@
-/*
- * linux/fs/readdir.c
- *
- * Copyright (C) 1995 Linus Torvalds
- */
-
-#include <linux/stddef.h>
-#include <linux/kernel.h>
-#include <linux/export.h>
-#include <linux/time.h>
-#include <linux/mm.h>
-#include <linux/errno.h>
-#include <linux/stat.h>
-#include <linux/file.h>
-#include <linux/fs.h>
-#include <linux/dirent.h>
-#include <linux/security.h>
-#include <linux/syscalls.h>
-#include <linux/unistd.h>
-
-#include <asm/uaccess.h>
-
-int vfs_readdir(struct file *file, filldir_t filler, void *buf)
-{
- struct inode *inode = file->f_path.dentry->d_inode;
- int res = -ENOTDIR;
- if (!file->f_op || !file->f_op->readdir)
- goto out;
-
- res = security_file_permission(file, MAY_READ);
- if (res)
- goto out;
-
- res = mutex_lock_killable(&inode->i_mutex);
- if (res)
- goto out;
-
- res = -ENOENT;
- if (!IS_DEADDIR(inode)) {
- res = file->f_op->readdir(file, buf, filler);
- file_accessed(file);
- }
- mutex_unlock(&inode->i_mutex);
-out:
- return res;
-}
-
-EXPORT_SYMBOL(vfs_readdir);
-
-/*
- * Traditional linux readdir() handling..
- *
- * "count=1" is a special case, meaning that the buffer is one
- * dirent-structure in size and that the code can't handle more
- * anyway. Thus the special "fillonedir()" function for that
- * case (the low-level handlers don't need to care about this).
- */
-
-#ifdef __ARCH_WANT_OLD_READDIR
-
-struct old_linux_dirent {
- unsigned long d_ino;
- unsigned long d_offset;
- unsigned short d_namlen;
- char d_name[1];
-};
-
-struct readdir_callback {
- struct old_linux_dirent __user * dirent;
- int result;
-};
-
-static int fillonedir(void * __buf, const char * name, int namlen, loff_t offset,
- u64 ino, unsigned int d_type)
-{
- struct readdir_callback * buf = (struct readdir_callback *) __buf;
- struct old_linux_dirent __user * dirent;
- unsigned long d_ino;
-
- if (buf->result)
- return -EINVAL;
- d_ino = ino;
- if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
- buf->result = -EOVERFLOW;
- return -EOVERFLOW;
- }
- buf->result++;
- dirent = buf->dirent;
- if (!access_ok(VERIFY_WRITE, dirent,
- (unsigned long)(dirent->d_name + namlen + 1) -
- (unsigned long)dirent))
- goto efault;
- if ( __put_user(d_ino, &dirent->d_ino) ||
- __put_user(offset, &dirent->d_offset) ||
- __put_user(namlen, &dirent->d_namlen) ||
- __copy_to_user(dirent->d_name, name, namlen) ||
- __put_user(0, dirent->d_name + namlen))
- goto efault;
- return 0;
-efault:
- buf->result = -EFAULT;
- return -EFAULT;
-}
-
-SYSCALL_DEFINE3(old_readdir, unsigned int, fd,
- struct old_linux_dirent __user *, dirent, unsigned int, count)
-{
- int error;
- struct file * file;
- struct readdir_callback buf;
-
- error = -EBADF;
- file = fget(fd);
- if (!file)
- goto out;
-
- buf.result = 0;
- buf.dirent = dirent;
-
- error = vfs_readdir(file, fillonedir, &buf);
- if (buf.result)
- error = buf.result;
-
- fput(file);
-out:
- return error;
-}
-
-#endif /* __ARCH_WANT_OLD_READDIR */
-
-/*
- * New, all-improved, singing, dancing, iBCS2-compliant getdents()
- * interface.
- */
-struct linux_dirent {
- unsigned long d_ino;
- unsigned long d_off;
- unsigned short d_reclen;
- char d_name[1];
-};
-
-struct getdents_callback {
- struct linux_dirent __user * current_dir;
- struct linux_dirent __user * previous;
- int count;
- int error;
-};
-
-static int filldir(void * __buf, const char * name, int namlen, loff_t offset,
- u64 ino, unsigned int d_type)
-{
- struct linux_dirent __user * dirent;
- struct getdents_callback * buf = (struct getdents_callback *) __buf;
- unsigned long d_ino;
- int reclen = ALIGN(offsetof(struct linux_dirent, d_name) + namlen + 2,
- sizeof(long));
-
- buf->error = -EINVAL; /* only used if we fail.. */
- if (reclen > buf->count)
- return -EINVAL;
- d_ino = ino;
- if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
- buf->error = -EOVERFLOW;
- return -EOVERFLOW;
- }
- dirent = buf->previous;
- if (dirent) {
- if (__put_user(offset, &dirent->d_off))
- goto efault;
- }
- dirent = buf->current_dir;
- if (__put_user(d_ino, &dirent->d_ino))
- goto efault;
- if (__put_user(reclen, &dirent->d_reclen))
- goto efault;
- if (copy_to_user(dirent->d_name, name, namlen))
- goto efault;
- if (__put_user(0, dirent->d_name + namlen))
- goto efault;
- if (__put_user(d_type, (char __user *) dirent + reclen - 1))
- goto efault;
- buf->previous = dirent;
- dirent = (void __user *)dirent + reclen;
- buf->current_dir = dirent;
- buf->count -= reclen;
- return 0;
-efault:
- buf->error = -EFAULT;
- return -EFAULT;
-}
-
-SYSCALL_DEFINE3(getdents, unsigned int, fd,
- struct linux_dirent __user *, dirent, unsigned int, count)
-{
- struct file * file;
- struct linux_dirent __user * lastdirent;
- struct getdents_callback buf;
- int error;
-
- error = -EFAULT;
- if (!access_ok(VERIFY_WRITE, dirent, count))
- goto out;
-
- error = -EBADF;
- file = fget(fd);
- if (!file)
- goto out;
-
- buf.current_dir = dirent;
- buf.previous = NULL;
- buf.count = count;
- buf.error = 0;
-
- error = vfs_readdir(file, filldir, &buf);
- if (error >= 0)
- error = buf.error;
- lastdirent = buf.previous;
- if (lastdirent) {
- if (put_user(file->f_pos, &lastdirent->d_off))
- error = -EFAULT;
- else
- error = count - buf.count;
- }
- fput(file);
-out:
- return error;
-}
-
-struct getdents_callback64 {
- struct linux_dirent64 __user * current_dir;
- struct linux_dirent64 __user * previous;
- int count;
- int error;
-};
-
-static int filldir64(void * __buf, const char * name, int namlen, loff_t offset,
- u64 ino, unsigned int d_type)
-{
- struct linux_dirent64 __user *dirent;
- struct getdents_callback64 * buf = (struct getdents_callback64 *) __buf;
- int reclen = ALIGN(offsetof(struct linux_dirent64, d_name) + namlen + 1,
- sizeof(u64));
-
- buf->error = -EINVAL; /* only used if we fail.. */
- if (reclen > buf->count)
- return -EINVAL;
- dirent = buf->previous;
- if (dirent) {
- if (__put_user(offset, &dirent->d_off))
- goto efault;
- }
- dirent = buf->current_dir;
- if (__put_user(ino, &dirent->d_ino))
- goto efault;
- if (__put_user(0, &dirent->d_off))
- goto efault;
- if (__put_user(reclen, &dirent->d_reclen))
- goto efault;
- if (__put_user(d_type, &dirent->d_type))
- goto efault;
- if (copy_to_user(dirent->d_name, name, namlen))
- goto efault;
- if (__put_user(0, dirent->d_name + namlen))
- goto efault;
- buf->previous = dirent;
- dirent = (void __user *)dirent + reclen;
- buf->current_dir = dirent;
- buf->count -= reclen;
- return 0;
-efault:
- buf->error = -EFAULT;
- return -EFAULT;
-}
-
-SYSCALL_DEFINE3(getdents64, unsigned int, fd,
- struct linux_dirent64 __user *, dirent, unsigned int, count)
-{
- struct file * file;
- struct linux_dirent64 __user * lastdirent;
- struct getdents_callback64 buf;
- int error;
-
- error = -EFAULT;
- if (!access_ok(VERIFY_WRITE, dirent, count))
- goto out;
-
- error = -EBADF;
- file = fget(fd);
- if (!file)
- goto out;
-
- buf.current_dir = dirent;
- buf.previous = NULL;
- buf.count = count;
- buf.error = 0;
-
- error = vfs_readdir(file, filldir64, &buf);
- if (error >= 0)
- error = buf.error;
- lastdirent = buf.previous;
- if (lastdirent) {
- typeof(lastdirent->d_off) d_off = file->f_pos;
- if (__put_user(d_off, &lastdirent->d_off))
- error = -EFAULT;
- else
- error = count - buf.count;
- }
- fput(file);
-out:
- return error;
-}
generated by cgit (git 2.34.1) at 2025-01-09 18:07:57 +0000