/*
- * linux/fs/ext3/file.c
+ * linux/fs/ext4/file.c
*
* Copyright (C) 1992, 1993, 1994, 1995
* Remy Card (card@masi.ibp.fr)
*
* Copyright (C) 1991, 1992 Linus Torvalds
*
- * ext3 fs regular file handling primitives
+ * ext4 fs regular file handling primitives
*
* 64-bit file support on 64-bit platforms by Jakub Jelinek
* (jj@sunsite.ms.mff.cuni.cz)
#include <linux/time.h>
#include <linux/fs.h>
-#include <linux/jbd.h>
-#include <linux/ext3_fs.h>
-#include <linux/ext3_jbd.h>
+#include <linux/jbd2.h>
+#include "ext4.h"
+#include "ext4_jbd2.h"
#include "xattr.h"
#include "acl.h"
/*
* Called when an inode is released. Note that this is different
- * from ext3_file_open: open gets called at every open, but release
+ * from ext4_file_open: open gets called at every open, but release
* gets called only when /all/ the files are closed.
*/
-static int ext3_release_file (struct inode * inode, struct file * filp)
+static int ext4_release_file(struct inode *inode, struct file *filp)
{
/* if we are the last writer on the inode, drop the block reservation */
if ((filp->f_mode & FMODE_WRITE) &&
(atomic_read(&inode->i_writecount) == 1))
{
- mutex_lock(&EXT3_I(inode)->truncate_mutex);
- ext3_discard_reservation(inode);
- mutex_unlock(&EXT3_I(inode)->truncate_mutex);
+ down_write(&EXT4_I(inode)->i_data_sem);
+ ext4_discard_preallocations(inode);
+ up_write(&EXT4_I(inode)->i_data_sem);
}
if (is_dx(inode) && filp->private_data)
- ext3_htree_free_dir_info(filp->private_data);
+ ext4_htree_free_dir_info(filp->private_data);
return 0;
}
static ssize_t
-ext3_file_write(struct kiocb *iocb, const struct iovec *iov,
+ext4_file_write(struct kiocb *iocb, const struct iovec *iov,
unsigned long nr_segs, loff_t pos)
{
struct file *file = iocb->ki_filp;
- struct inode *inode = file->f_dentry->d_inode;
+ struct inode *inode = file->f_path.dentry->d_inode;
ssize_t ret;
int err;
- ret = generic_file_aio_write(iocb, iov, nr_segs, pos);
+ /*
+ * If we have encountered a bitmap-format file, the size limit
+ * is smaller than s_maxbytes, which is for extent-mapped files.
+ */
+
+ if (!(EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL)) {
+ struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
+ size_t length = iov_length(iov, nr_segs);
+ if (pos > sbi->s_bitmap_maxbytes)
+ return -EFBIG;
+
+ if (pos + length > sbi->s_bitmap_maxbytes) {
+ nr_segs = iov_shorten((struct iovec *)iov, nr_segs,
+ sbi->s_bitmap_maxbytes - pos);
+ }
+ }
+
+ ret = generic_file_aio_write(iocb, iov, nr_segs, pos);
/*
* Skip flushing if there was an error, or if nothing was written.
*/
* Open question --- do we care about flushing timestamps too
* if the inode is IS_SYNC?
*/
- if (!ext3_should_journal_data(inode))
+ if (!ext4_should_journal_data(inode))
return ret;
goto force_commit;
*/
force_commit:
- err = ext3_force_commit(inode->i_sb);
+ err = ext4_force_commit(inode->i_sb);
if (err)
return err;
return ret;
}
-const struct file_operations ext3_file_operations = {
+static struct vm_operations_struct ext4_file_vm_ops = {
+ .fault = filemap_fault,
+ .page_mkwrite = ext4_page_mkwrite,
+};
+
+static int ext4_file_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ struct address_space *mapping = file->f_mapping;
+
+ if (!mapping->a_ops->readpage)
+ return -ENOEXEC;
+ file_accessed(file);
+ vma->vm_ops = &ext4_file_vm_ops;
+ vma->vm_flags |= VM_CAN_NONLINEAR;
+ return 0;
+}
+
+const struct file_operations ext4_file_operations = {
.llseek = generic_file_llseek,
.read = do_sync_read,
.write = do_sync_write,
.aio_read = generic_file_aio_read,
- .aio_write = ext3_file_write,
- .ioctl = ext3_ioctl,
+ .aio_write = ext4_file_write,
+ .unlocked_ioctl = ext4_ioctl,
#ifdef CONFIG_COMPAT
- .compat_ioctl = ext3_compat_ioctl,
+ .compat_ioctl = ext4_compat_ioctl,
#endif
- .mmap = generic_file_mmap,
+ .mmap = ext4_file_mmap,
.open = generic_file_open,
- .release = ext3_release_file,
- .fsync = ext3_sync_file,
- .sendfile = generic_file_sendfile,
+ .release = ext4_release_file,
+ .fsync = ext4_sync_file,
.splice_read = generic_file_splice_read,
.splice_write = generic_file_splice_write,
};
-struct inode_operations ext3_file_inode_operations = {
- .truncate = ext3_truncate,
- .setattr = ext3_setattr,
-#ifdef CONFIG_EXT3_FS_XATTR
+const struct inode_operations ext4_file_inode_operations = {
+ .truncate = ext4_truncate,
+ .setattr = ext4_setattr,
+ .getattr = ext4_getattr,
+#ifdef CONFIG_EXT4_FS_XATTR
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
- .listxattr = ext3_listxattr,
+ .listxattr = ext4_listxattr,
.removexattr = generic_removexattr,
#endif
- .permission = ext3_permission,
+ .permission = ext4_permission,
+ .fallocate = ext4_fallocate,
+ .fiemap = ext4_fiemap,
};