#include <linux/time.h>
#include <linux/fs.h>
#include <linux/jbd2.h>
-#include <linux/ext4_fs.h>
-#include <linux/ext4_jbd2.h>
+#include <linux/mount.h>
+#include <linux/path.h>
+#include <linux/quotaops.h>
+#include "ext4.h"
+#include "ext4_jbd2.h"
#include "xattr.h"
#include "acl.h"
* from ext4_file_open: open gets called at every open, but release
* gets called only when /all/ the files are closed.
*/
-static int ext4_release_file (struct inode * inode, struct file * filp)
+static int ext4_release_file(struct inode *inode, struct file *filp)
{
+ if (ext4_test_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE)) {
+ ext4_alloc_da_blocks(inode);
+ ext4_clear_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE);
+ }
/* 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))
+ (atomic_read(&inode->i_writecount) == 1) &&
+ !EXT4_I(inode)->i_reserved_data_blocks)
{
- mutex_lock(&EXT4_I(inode)->truncate_mutex);
- ext4_discard_reservation(inode);
- mutex_unlock(&EXT4_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)
ext4_htree_free_dir_info(filp->private_data);
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;
- ssize_t ret;
- int err;
-
- ret = generic_file_aio_write(iocb, iov, nr_segs, pos);
+ struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
/*
- * Skip flushing if there was an error, or if nothing was written.
+ * If we have encountered a bitmap-format file, the size limit
+ * is smaller than s_maxbytes, which is for extent-mapped files.
*/
- if (ret <= 0)
- return ret;
- /*
- * If the inode is IS_SYNC, or is O_SYNC and we are doing data
- * journalling then we need to make sure that we force the transaction
- * to disk to keep all metadata uptodate synchronously.
- */
- if (file->f_flags & O_SYNC) {
- /*
- * If we are non-data-journaled, then the dirty data has
- * already been flushed to backing store by generic_osync_inode,
- * and the inode has been flushed too if there have been any
- * modifications other than mere timestamp updates.
- *
- * Open question --- do we care about flushing timestamps too
- * if the inode is IS_SYNC?
- */
- if (!ext4_should_journal_data(inode))
- return ret;
+ 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);
- goto force_commit;
+ 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);
+ }
}
- /*
- * So we know that there has been no forced data flush. If the inode
- * is marked IS_SYNC, we need to force one ourselves.
- */
- if (!IS_SYNC(inode))
- return ret;
+ return generic_file_aio_write(iocb, iov, nr_segs, pos);
+}
- /*
- * Open question #2 --- should we force data to disk here too? If we
- * don't, the only impact is that data=writeback filesystems won't
- * flush data to disk automatically on IS_SYNC, only metadata (but
- * historically, that is what ext2 has done.)
- */
+static const 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;
+}
-force_commit:
- err = ext4_force_commit(inode->i_sb);
- if (err)
- return err;
- return ret;
+static int ext4_file_open(struct inode * inode, struct file * filp)
+{
+ struct super_block *sb = inode->i_sb;
+ struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
+ struct vfsmount *mnt = filp->f_path.mnt;
+ struct path path;
+ char buf[64], *cp;
+
+ if (unlikely(!(sbi->s_mount_flags & EXT4_MF_MNTDIR_SAMPLED) &&
+ !(sb->s_flags & MS_RDONLY))) {
+ sbi->s_mount_flags |= EXT4_MF_MNTDIR_SAMPLED;
+ /*
+ * Sample where the filesystem has been mounted and
+ * store it in the superblock for sysadmin convenience
+ * when trying to sort through large numbers of block
+ * devices or filesystem images.
+ */
+ memset(buf, 0, sizeof(buf));
+ path.mnt = mnt;
+ path.dentry = mnt->mnt_root;
+ cp = d_path(&path, buf, sizeof(buf));
+ if (!IS_ERR(cp)) {
+ memcpy(sbi->s_es->s_last_mounted, cp,
+ sizeof(sbi->s_es->s_last_mounted));
+ sb->s_dirt = 1;
+ }
+ }
+ return dquot_file_open(inode, filp);
}
const struct file_operations ext4_file_operations = {
.write = do_sync_write,
.aio_read = generic_file_aio_read,
.aio_write = ext4_file_write,
- .ioctl = ext4_ioctl,
+ .unlocked_ioctl = ext4_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = ext4_compat_ioctl,
#endif
- .mmap = generic_file_mmap,
- .open = generic_file_open,
+ .mmap = ext4_file_mmap,
+ .open = ext4_file_open,
.release = ext4_release_file,
.fsync = ext4_sync_file,
- .sendfile = generic_file_sendfile,
.splice_read = generic_file_splice_read,
.splice_write = generic_file_splice_write,
};
-struct inode_operations ext4_file_inode_operations = {
+const struct inode_operations ext4_file_inode_operations = {
.truncate = ext4_truncate,
.setattr = ext4_setattr,
-#ifdef CONFIG_EXT4DEV_FS_XATTR
+ .getattr = ext4_getattr,
+#ifdef CONFIG_EXT4_FS_XATTR
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = ext4_listxattr,
.removexattr = generic_removexattr,
#endif
- .permission = ext4_permission,
+ .check_acl = ext4_check_acl,
+ .fallocate = ext4_fallocate,
+ .fiemap = ext4_fiemap,
};
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff