diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/udf/file.c')
| -rw-r--r-- | ANDROID_3.4.5/fs/udf/file.c | 249 |
1 files changed, 0 insertions, 249 deletions
diff --git a/ANDROID_3.4.5/fs/udf/file.c b/ANDROID_3.4.5/fs/udf/file.c deleted file mode 100644 index 7f3f7ba3..00000000 --- a/ANDROID_3.4.5/fs/udf/file.c +++ /dev/null @@ -1,249 +0,0 @@ -/* - * file.c - * - * PURPOSE - * File handling routines for the OSTA-UDF(tm) filesystem. - * - * COPYRIGHT - * This file is distributed under the terms of the GNU General Public - * License (GPL). Copies of the GPL can be obtained from: - * ftp://prep.ai.mit.edu/pub/gnu/GPL - * Each contributing author retains all rights to their own work. - * - * (C) 1998-1999 Dave Boynton - * (C) 1998-2004 Ben Fennema - * (C) 1999-2000 Stelias Computing Inc - * - * HISTORY - * - * 10/02/98 dgb Attempt to integrate into udf.o - * 10/07/98 Switched to using generic_readpage, etc., like isofs - * And it works! - * 12/06/98 blf Added udf_file_read. uses generic_file_read for all cases but - * ICBTAG_FLAG_AD_IN_ICB. - * 04/06/99 64 bit file handling on 32 bit systems taken from ext2 file.c - * 05/12/99 Preliminary file write support - */ - -#include "udfdecl.h" -#include <linux/fs.h> -#include <asm/uaccess.h> -#include <linux/kernel.h> -#include <linux/string.h> /* memset */ -#include <linux/capability.h> -#include <linux/errno.h> -#include <linux/pagemap.h> -#include <linux/buffer_head.h> -#include <linux/aio.h> - -#include "udf_i.h" -#include "udf_sb.h" - -static int udf_adinicb_readpage(struct file *file, struct page *page) -{ - struct inode *inode = page->mapping->host; - char *kaddr; - struct udf_inode_info *iinfo = UDF_I(inode); - - BUG_ON(!PageLocked(page)); - - kaddr = kmap(page); - memset(kaddr, 0, PAGE_CACHE_SIZE); - memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr, inode->i_size); - flush_dcache_page(page); - SetPageUptodate(page); - kunmap(page); - unlock_page(page); - - return 0; -} - -static int udf_adinicb_writepage(struct page *page, - struct writeback_control *wbc) -{ - struct inode *inode = page->mapping->host; - char *kaddr; - struct udf_inode_info *iinfo = UDF_I(inode); - - BUG_ON(!PageLocked(page)); - - kaddr = kmap(page); - memcpy(iinfo->i_ext.i_data + iinfo->i_lenEAttr, kaddr, inode->i_size); - mark_inode_dirty(inode); - SetPageUptodate(page); - kunmap(page); - unlock_page(page); - - return 0; -} - -static int udf_adinicb_write_end(struct file *file, - struct address_space *mapping, - loff_t pos, unsigned len, unsigned copied, - struct page *page, void *fsdata) -{ - struct inode *inode = mapping->host; - unsigned offset = pos & (PAGE_CACHE_SIZE - 1); - char *kaddr; - struct udf_inode_info *iinfo = UDF_I(inode); - - kaddr = kmap_atomic(page); - memcpy(iinfo->i_ext.i_data + iinfo->i_lenEAttr + offset, - kaddr + offset, copied); - kunmap_atomic(kaddr); - - return simple_write_end(file, mapping, pos, len, copied, page, fsdata); -} - -const struct address_space_operations udf_adinicb_aops = { - .readpage = udf_adinicb_readpage, - .writepage = udf_adinicb_writepage, - .write_begin = simple_write_begin, - .write_end = udf_adinicb_write_end, -}; - -static ssize_t udf_file_aio_write(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t ppos) -{ - ssize_t retval; - struct file *file = iocb->ki_filp; - struct inode *inode = file->f_path.dentry->d_inode; - int err, pos; - size_t count = iocb->ki_left; - struct udf_inode_info *iinfo = UDF_I(inode); - - down_write(&iinfo->i_data_sem); - if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { - if (file->f_flags & O_APPEND) - pos = inode->i_size; - else - pos = ppos; - - if (inode->i_sb->s_blocksize < - (udf_file_entry_alloc_offset(inode) + - pos + count)) { - err = udf_expand_file_adinicb(inode); - if (err) { - udf_debug("udf_expand_adinicb: err=%d\n", err); - return err; - } - } else { - if (pos + count > inode->i_size) - iinfo->i_lenAlloc = pos + count; - else - iinfo->i_lenAlloc = inode->i_size; - up_write(&iinfo->i_data_sem); - } - } else - up_write(&iinfo->i_data_sem); - - retval = generic_file_aio_write(iocb, iov, nr_segs, ppos); - if (retval > 0) - mark_inode_dirty(inode); - - return retval; -} - -long udf_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) -{ - struct inode *inode = filp->f_dentry->d_inode; - long old_block, new_block; - int result = -EINVAL; - - if (inode_permission(inode, MAY_READ) != 0) { - udf_debug("no permission to access inode %lu\n", inode->i_ino); - result = -EPERM; - goto out; - } - - if (!arg) { - udf_debug("invalid argument to udf_ioctl\n"); - result = -EINVAL; - goto out; - } - - switch (cmd) { - case UDF_GETVOLIDENT: - if (copy_to_user((char __user *)arg, - UDF_SB(inode->i_sb)->s_volume_ident, 32)) - result = -EFAULT; - else - result = 0; - goto out; - case UDF_RELOCATE_BLOCKS: - if (!capable(CAP_SYS_ADMIN)) { - result = -EACCES; - goto out; - } - if (get_user(old_block, (long __user *)arg)) { - result = -EFAULT; - goto out; - } - result = udf_relocate_blocks(inode->i_sb, - old_block, &new_block); - if (result == 0) - result = put_user(new_block, (long __user *)arg); - goto out; - case UDF_GETEASIZE: - result = put_user(UDF_I(inode)->i_lenEAttr, (int __user *)arg); - goto out; - case UDF_GETEABLOCK: - result = copy_to_user((char __user *)arg, - UDF_I(inode)->i_ext.i_data, - UDF_I(inode)->i_lenEAttr) ? -EFAULT : 0; - goto out; - } - -out: - return result; -} - -static int udf_release_file(struct inode *inode, struct file *filp) -{ - if (filp->f_mode & FMODE_WRITE) { - down_write(&UDF_I(inode)->i_data_sem); - udf_discard_prealloc(inode); - udf_truncate_tail_extent(inode); - up_write(&UDF_I(inode)->i_data_sem); - } - return 0; -} - -const struct file_operations udf_file_operations = { - .read = do_sync_read, - .aio_read = generic_file_aio_read, - .unlocked_ioctl = udf_ioctl, - .open = generic_file_open, - .mmap = generic_file_mmap, - .write = do_sync_write, - .aio_write = udf_file_aio_write, - .release = udf_release_file, - .fsync = generic_file_fsync, - .splice_read = generic_file_splice_read, - .llseek = generic_file_llseek, -}; - -static int udf_setattr(struct dentry *dentry, struct iattr *attr) -{ - struct inode *inode = dentry->d_inode; - int error; - - error = inode_change_ok(inode, attr); - if (error) - return error; - - if ((attr->ia_valid & ATTR_SIZE) && - attr->ia_size != i_size_read(inode)) { - error = udf_setsize(inode, attr->ia_size); - if (error) - return error; - } - - setattr_copy(inode, attr); - mark_inode_dirty(inode); - return 0; -} - -const struct inode_operations udf_file_inode_operations = { - .setattr = udf_setattr, -}; |