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udf: Replace bkl with the UDF_I(inode)->i_data_sem for protect udf_inode_info struct

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Replace bkl with the UDF_I(inode)->i_data_sem rw semaphore in
udf_release_file(), udf_symlink(), udf_symlink_filler(), udf_get_block(),
udf_block_map(), and udf_setattr(). The rule now is that any operation
on regular file's or symlink's extents (or generally allocation information
including goal block) needs to hold i_data_sem.

This work was supported by a hardware donation from the CE Linux Forum.

Signed-off-by: Alessio Igor Bogani <abogani@texware.it>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Alessio Igor Bogani
2010-11-16 18:40:47 +01:00
committed by Jan Kara
parent d1668fe390
commit 4d0fb621d3
6 changed files with 37 additions and 19 deletions
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4
fs/udf/file.c
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@ -204,10 +204,10 @@ static int udf_release_file(struct inode *inode, struct file *filp)
{
if (filp->f_mode & FMODE_WRITE) {
mutex_lock(&inode->i_mutex);
lock_kernel();
down_write(&UDF_I(inode)->i_data_sem);
udf_discard_prealloc(inode);
udf_truncate_tail_extent(inode);
unlock_kernel();
up_write(&UDF_I(inode)->i_data_sem);
mutex_unlock(&inode->i_mutex);
}
return 0;