From c334b1138bd44bea578eab7971c59bd9212a1093 Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Mon, 18 Jul 2011 13:21:37 -0400 Subject: Ext4: handle SEEK_HOLE/SEEK_DATA generically Since Ext4 has its own lseek we need to make sure it handles SEEK_HOLE/SEEK_DATA. For now just do the same thing that is done in the generic case, somebody else can come along and make it do fancy things later. Thanks, Signed-off-by: Josef Bacik Signed-off-by: Al Viro --- fs/ext4/file.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'fs') diff --git a/fs/ext4/file.c b/fs/ext4/file.c index 2c097232200..ce766f974b1 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -236,6 +236,27 @@ loff_t ext4_llseek(struct file *file, loff_t offset, int origin) } offset += file->f_pos; break; + case SEEK_DATA: + /* + * In the generic case the entire file is data, so as long as + * offset isn't at the end of the file then the offset is data. + */ + if (offset >= inode->i_size) { + mutex_unlock(&inode->i_mutex); + return -ENXIO; + } + break; + case SEEK_HOLE: + /* + * There is a virtual hole at the end of the file, so as long as + * offset isn't i_size or larger, return i_size. + */ + if (offset >= inode->i_size) { + mutex_unlock(&inode->i_mutex); + return -ENXIO; + } + offset = inode->i_size; + break; } if (offset < 0 || offset > maxbytes) { -- cgit v1.2.3