int ext2_fsync(struct file *file, int datasync)
{
int ret;
struct inode *inode = file->f_mapping->host;
ino_t ino = inode->i_ino;
struct super_block *sb = inode->i_sb;
struct address_space *sb_mapping = sb->s_bdev->bd_inode->i_mapping;
struct buffer_head *bh;
struct ext2_inode *raw_inode;
ret = generic_file_fsync(file, datasync);
if (ret == -EIO || test_and_clear_bit(AS_EIO, &sb_mapping->flags)) {
/* We don't really know where the IO error happened... */
ext2_error(sb, __func__,
"detected IO error when writing metadata buffers");
return -EIO;
}
raw_inode = ext2_get_inode(sb, ino, &bh);
if (IS_ERR(raw_inode))
return -EIO;
sync_dirty_buffer(bh);
if (buffer_req(bh) && !buffer_uptodate(bh)) {
printk ("IO error syncing ext2 inode [%s:%08lx]\n",
sb->s_id, (unsigned long) ino);
ret = -EIO;
}
brelse (bh);
return ret;
}
static int wrapfs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
{
int err;
struct file *lower_file;
struct path lower_path;
struct dentry *dentry = file->f_path.dentry;
#ifdef EXTRA_CREDIT
if(wrapfs_get_debug(file->f_dentry->d_sb) & DEBUG_FILE)
DEBUG_MESG("Enter");
#endif
err = generic_file_fsync(file, start, end, datasync);
if (err)
goto out;
lower_file = wrapfs_lower_file(file);
wrapfs_get_lower_path(dentry, &lower_path);
err = vfs_fsync_range(lower_file, start, end, datasync);
wrapfs_put_lower_path(dentry, &lower_path);
out:
#ifdef EXTRA_CREDIT
if(wrapfs_get_debug(file->f_dentry->d_sb) & DEBUG_FILE)
DEBUG_RETURN("Exit", err);
#endif
return err;
}
int lkfs_fsync(struct file *file, int datasync)
{
int ret;
//struct super_block *sb = file->f_mapping->host->i_sb;
//struct address_space *mapping = sb->s_bdev->bd_inode->i_mapping;
ret = generic_file_fsync(file, datasync);
return ret;
}
int ext4_sync_file(struct file *file, int datasync)
{
struct inode *inode = file->f_mapping->host;
struct ext4_inode_info *ei = EXT4_I(inode);
journal_t *journal = EXT4_SB(inode->i_sb)->s_journal;
int ret;
tid_t commit_tid;
bool needs_barrier = false;
J_ASSERT(ext4_journal_current_handle() == NULL);
trace_ext4_sync_file(file, datasync);
if (inode->i_sb->s_flags & MS_RDONLY)
return 0;
ret = flush_completed_IO(inode);
if (ret < 0)
return ret;
if (!journal) {
ret = generic_file_fsync(file, datasync);
if (!ret && !list_empty(&inode->i_dentry))
ext4_sync_parent(inode);
return ret;
}
/*
* data=writeback,ordered:
* The caller's filemap_fdatawrite()/wait will sync the data.
* Metadata is in the journal, we wait for proper transaction to
* commit here.
*
* data=journal:
* filemap_fdatawrite won't do anything (the buffers are clean).
* ext4_force_commit will write the file data into the journal and
* will wait on that.
* filemap_fdatawait() will encounter a ton of newly-dirtied pages
* (they were dirtied by commit). But that's OK - the blocks are
* safe in-journal, which is all fsync() needs to ensure.
*/
if (ext4_should_journal_data(inode))
return ext4_force_commit(inode->i_sb);
commit_tid = datasync ? ei->i_datasync_tid : ei->i_sync_tid;
if (journal->j_flags & JBD2_BARRIER &&
!jbd2_trans_will_send_data_barrier(journal, commit_tid))
needs_barrier = true;
jbd2_log_start_commit(journal, commit_tid);
ret = jbd2_log_wait_commit(journal, commit_tid);
if (needs_barrier)
blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL,
BLKDEV_IFL_WAIT);
return ret;
}
int fat_file_fsync(struct file *filp, loff_t start, loff_t end, int datasync)
{
struct inode *inode = filp->f_mapping->host;
int res, err;
res = generic_file_fsync(filp, start, end, datasync);
err = sync_mapping_buffers(MSDOS_SB(inode->i_sb)->fat_inode->i_mapping);
return res ? res : err;
}
static int
ecryptfs_fsync(struct file *file, int datasync)
{
int rc = 0;
rc = generic_file_fsync(file, datasync);
if (rc)
goto out;
rc = vfs_fsync(ecryptfs_file_to_lower(file), datasync);
out:
return rc;
}
int ext2_fsync(struct file *file, loff_t start, loff_t end, int datasync)
{
int ret;
struct super_block *sb = file->f_mapping->host->i_sb;
ret = generic_file_fsync(file, start, end, datasync);
if (ret == -EIO)
/* We don't really know where the IO error happened... */
ext2_error(sb, __func__,
"detected IO error when writing metadata buffers");
return ret;
}
static int
ecryptfs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
{
int rc = 0;
rc = generic_file_fsync(file, start, end, datasync);
if (rc)
goto out;
rc = vfs_fsync_range(ecryptfs_file_to_lower(file), start, end,
datasync);
out:
return rc;
}
int ext2_fsync(struct file *file, loff_t start, loff_t end, int datasync)
{
int ret;
struct super_block *sb = file->f_mapping->host->i_sb;
struct address_space *mapping = sb->s_bdev->bd_inode->i_mapping;
ret = generic_file_fsync(file, start, end, datasync);
if (ret == -EIO || test_and_clear_bit(AS_EIO, &mapping->flags)) {
/* We don't really know where the IO error happened... */
ext2_error(sb, __func__,
"detected IO error when writing metadata buffers");
ret = -EIO;
}
return ret;
}
static int wrapfs_fsync(struct file *file, loff_t start, loff_t end,
int datasync)
{
int err;
struct file *lower_file;
struct path lower_path;
struct dentry *dentry = file->f_path.dentry;
err = generic_file_fsync(file, start, end, datasync);
if (err)
goto out;
lower_file = wrapfs_lower_file(file);
wrapfs_get_lower_path(dentry, &lower_path);
err = vfs_fsync_range(lower_file, start, end, datasync);
wrapfs_put_lower_path(dentry, &lower_path);
out:
return err;
}
int ext4_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
{
struct inode *inode = file->f_mapping->host;
struct ext4_inode_info *ei = EXT4_I(inode);
journal_t *journal = EXT4_SB(inode->i_sb)->s_journal;
int ret = 0, err;
tid_t commit_tid;
bool needs_barrier = false;
J_ASSERT(ext4_journal_current_handle() == NULL);
trace_ext4_sync_file_enter(file, datasync);
if (inode->i_sb->s_flags & MS_RDONLY) {
/* Make sure that we read updated s_mount_flags value */
smp_rmb();
if (EXT4_SB(inode->i_sb)->s_mount_flags & EXT4_MF_FS_ABORTED)
ret = -EROFS;
goto out;
}
if (!journal) {
ret = generic_file_fsync(file, start, end, datasync);
if (!ret && !hlist_empty(&inode->i_dentry))
ret = ext4_sync_parent(inode);
goto out;
}
ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
if (ret)
return ret;
/*
* data=writeback,ordered:
* The caller's filemap_fdatawrite()/wait will sync the data.
* Metadata is in the journal, we wait for proper transaction to
* commit here.
*
* data=journal:
* filemap_fdatawrite won't do anything (the buffers are clean).
* ext4_force_commit will write the file data into the journal and
* will wait on that.
* filemap_fdatawait() will encounter a ton of newly-dirtied pages
* (they were dirtied by commit). But that's OK - the blocks are
* safe in-journal, which is all fsync() needs to ensure.
*/
if (ext4_should_journal_data(inode)) {
ret = ext4_force_commit(inode->i_sb);
goto out;
}
commit_tid = datasync ? ei->i_datasync_tid : ei->i_sync_tid;
if (journal->j_flags & JBD2_BARRIER &&
!jbd2_trans_will_send_data_barrier(journal, commit_tid))
needs_barrier = true;
ret = jbd2_complete_transaction(journal, commit_tid);
if (needs_barrier) {
err = blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
if (!ret)
ret = err;
}
out:
trace_ext4_sync_file_exit(inode, ret);
return ret;
}
int testfs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
{
return generic_file_fsync(file, start, end, datasync);
}