Illumos 4757, 4913

4757 ZFS embedded-data block pointers ("zero block compression")
4913 zfs release should not be subject to space checks

Reviewed by: Adam Leventhal <[email protected]>
Reviewed by: Max Grossman <[email protected]>
Reviewed by: George Wilson <[email protected]>
Reviewed by: Christopher Siden <[email protected]>
Reviewed by: Dan McDonald <[email protected]>
Approved by: Dan McDonald <[email protected]>

References:
  https://www.illumos.org/issues/4757
  https://www.illumos.org/issues/4913
  https://github.com/illumos/illumos-gate/commit/5d7b4d4

Porting notes:

For compatibility with the fastpath code the zio_done() function
needed to be updated.  Because embedded-data block pointers do
not require DVAs to be allocated the associated vdevs will not
be marked and therefore should not be unmarked.

Ported by: Tim Chase <[email protected]>
Signed-off-by: Brian Behlendorf <[email protected]>
Closes #2544

1 files changed, 25 insertions, 8 deletions

diff --git a/include/sys/zfs_ioctl.h b/include/sys/zfs_ioctl.h
index c7bd789e8..5cfdcc50f 100644
--- a/include/sys/zfs_ioctl.h
+++ b/include/sys/zfs_ioctl.h
@@ -20,7 +20,7 @@
  */
 /*
  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2012 by Delphix. All rights reserved.
+ * Copyright (c) 2013 by Delphix. All rights reserved.
  */
 
 #ifndef	_SYS_ZFS_IOCTL_H
@@ -90,15 +90,19 @@ typedef enum drr_headertype {
  * Feature flags for zfs send streams (flags in drr_versioninfo)
  */
 
-#define	DMU_BACKUP_FEATURE_DEDUP	(0x1)
-#define	DMU_BACKUP_FEATURE_DEDUPPROPS	(0x2)
-#define	DMU_BACKUP_FEATURE_SA_SPILL	(0x4)
+#define	DMU_BACKUP_FEATURE_DEDUP		(1<<0)
+#define	DMU_BACKUP_FEATURE_DEDUPPROPS		(1<<1)
+#define	DMU_BACKUP_FEATURE_SA_SPILL		(1<<2)
+/* flags #3 - #15 are reserved for incompatible closed-source implementations */
+#define	DMU_BACKUP_FEATURE_EMBED_DATA		(1<<16)
+#define	DMU_BACKUP_FEATURE_EMBED_DATA_LZ4	(1<<17)
 
 /*
  * Mask of all supported backup features
  */
 #define	DMU_BACKUP_FEATURE_MASK	(DMU_BACKUP_FEATURE_DEDUP | \
-		DMU_BACKUP_FEATURE_DEDUPPROPS | DMU_BACKUP_FEATURE_SA_SPILL)
+    DMU_BACKUP_FEATURE_DEDUPPROPS | DMU_BACKUP_FEATURE_SA_SPILL | \
+    DMU_BACKUP_FEATURE_EMBED_DATA | DMU_BACKUP_FEATURE_EMBED_DATA_LZ4)
 
 /* Are all features in the given flag word currently supported? */
 #define	DMU_STREAM_SUPPORTED(x)	(!((x) & ~DMU_BACKUP_FEATURE_MASK))
@@ -140,7 +144,7 @@ typedef struct dmu_replay_record {
 	enum {
 		DRR_BEGIN, DRR_OBJECT, DRR_FREEOBJECTS,
 		DRR_WRITE, DRR_FREE, DRR_END, DRR_WRITE_BYREF,
-		DRR_SPILL, DRR_NUMTYPES
+		DRR_SPILL, DRR_WRITE_EMBEDDED, DRR_NUMTYPES
 	} drr_type;
 	uint32_t drr_payloadlen;
 	union {
@@ -217,6 +221,19 @@ typedef struct dmu_replay_record {
 			uint64_t drr_pad[4]; /* needed for crypto */
 			/* spill data follows */
 		} drr_spill;
+		struct drr_write_embedded {
+			uint64_t drr_object;
+			uint64_t drr_offset;
+			/* logical length, should equal blocksize */
+			uint64_t drr_length;
+			uint64_t drr_toguid;
+			uint8_t drr_compression;
+			uint8_t drr_etype;
+			uint8_t drr_pad[6];
+			uint32_t drr_lsize; /* uncompressed size of payload */
+			uint32_t drr_psize; /* compr. (real) size of payload */
+			/* (possibly compressed) content follows */
+		} drr_write_embedded;
 	} drr_u;
 } dmu_replay_record_t;
 
@@ -325,8 +342,8 @@ typedef struct zfs_cmd {
 	dmu_objset_stats_t zc_objset_stats;
 	struct drr_begin zc_begin_record;
 	zinject_record_t zc_inject_record;
-	boolean_t	zc_defer_destroy;
-	boolean_t	zc_temphold;
+	uint32_t	zc_defer_destroy;
+	uint32_t	zc_flags;
 	uint64_t	zc_action_handle;
 	int		zc_cleanup_fd;
 	uint8_t		zc_simple;