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 <josef@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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@ -236,6 +236,27 @@ loff_t ext4_llseek(struct file *file, loff_t offset, int origin)
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}
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offset += file->f_pos;
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break;
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case SEEK_DATA:
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/*
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* In the generic case the entire file is data, so as long as
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* offset isn't at the end of the file then the offset is data.
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*/
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if (offset >= inode->i_size) {
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mutex_unlock(&inode->i_mutex);
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return -ENXIO;
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}
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break;
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case SEEK_HOLE:
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/*
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* There is a virtual hole at the end of the file, so as long as
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* offset isn't i_size or larger, return i_size.
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*/
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if (offset >= inode->i_size) {
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mutex_unlock(&inode->i_mutex);
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return -ENXIO;
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}
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offset = inode->i_size;
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break;
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}
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if (offset < 0 || offset > maxbytes) {
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