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-rw-r--r--include/sys/abd.h13
1 files changed, 11 insertions, 2 deletions
diff --git a/include/sys/abd.h b/include/sys/abd.h
index 3d9fdbf10..b781be4da 100644
--- a/include/sys/abd.h
+++ b/include/sys/abd.h
@@ -20,7 +20,7 @@
*/
/*
* Copyright (c) 2014 by Chunwei Chen. All rights reserved.
- * Copyright (c) 2016 by Delphix. All rights reserved.
+ * Copyright (c) 2016, 2019 by Delphix. All rights reserved.
*/
#ifndef _ABD_H
@@ -44,7 +44,8 @@ typedef enum abd_flags {
ABD_FLAG_OWNER = 1 << 1, /* does it own its data buffers? */
ABD_FLAG_META = 1 << 2, /* does this represent FS metadata? */
ABD_FLAG_MULTI_ZONE = 1 << 3, /* pages split over memory zones */
- ABD_FLAG_MULTI_CHUNK = 1 << 4 /* pages split over multiple chunks */
+ ABD_FLAG_MULTI_CHUNK = 1 << 4, /* pages split over multiple chunks */
+ ABD_FLAG_LINEAR_PAGE = 1 << 5, /* linear but allocd from page */
} abd_flags_t;
typedef struct abd {
@@ -60,6 +61,7 @@ typedef struct abd {
} abd_scatter;
struct abd_linear {
void *abd_buf;
+ struct scatterlist *abd_sgl; /* for LINEAR_PAGE */
} abd_linear;
} abd_u;
} abd_t;
@@ -75,6 +77,13 @@ abd_is_linear(abd_t *abd)
return ((abd->abd_flags & ABD_FLAG_LINEAR) != 0 ? B_TRUE : B_FALSE);
}
+static inline boolean_t
+abd_is_linear_page(abd_t *abd)
+{
+ return ((abd->abd_flags & ABD_FLAG_LINEAR_PAGE) != 0 ?
+ B_TRUE : B_FALSE);
+}
+
/*
* Allocations and deallocations
*/