Add SEEK_DATA/SEEK_HOLE to lseek()/llseek()

[zfs.git] / include / linux / vfs_compat.h

diff --git a/include/linux/vfs_compat.h b/include/linux/vfs_compat.h
index bccf0d0..17fa3ff 100644 (file)
--- a/include/linux/vfs_compat.h
+++ b/include/linux/vfs_compat.h
@@ -152,4 +152,26 @@ typedef    int             zpl_umode_t;
 #define ZFS_IOC_GETFLAGS       FS_IOC_GETFLAGS
 #define ZFS_IOC_SETFLAGS       FS_IOC_SETFLAGS
 
+#if defined(SEEK_HOLE) && defined(SEEK_DATA) && !defined(HAVE_LSEEK_EXECUTE)
+static inline loff_t
+lseek_execute(struct file *filp, struct inode *inode,
+             loff_t offset, loff_t maxsize)
+{
+       if (offset < 0 && !(filp->f_mode & FMODE_UNSIGNED_OFFSET))
+               return (-EINVAL);
+
+       if (offset > maxsize)
+               return (-EINVAL);
+
+       if (offset != filp->f_pos) {
+               spin_lock(&filp->f_lock);
+               filp->f_pos = offset;
+               filp->f_version = 0;
+               spin_unlock(&filp->f_lock);
+       }
+
+       return (offset);
+}
+#endif /* SEEK_HOLE && SEEK_DATA && !HAVE_LSEEK_EXECUTE */
+
 #endif /* _ZFS_VFS_H */