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DMU_BACKUP_FEATURE: indicate that bit 28 and 29 are reserved 

Bit 28 is used by an internal Nutanix feature which might be
upstreamed in the future.

Bit 29 is the last unused bit. It is reserved to indicate a
to-be-designed extension to the stream format which will accomodate
more feature flags.

Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Christian Schwarz <christian.schwarz@nutanix.com>
Issue #13795
Closes #13796
This commit is contained in:
Christian Schwarz 2022-08-24 17:04:19 +00:00 committed by Brian Behlendorf
parent 5c9666382a
commit e872ea16f2
1 changed files with 7 additions and 0 deletions
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7
include/sys/zfs_ioctl.h
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@ -124,6 +124,13 @@ typedef enum drr_headertype {
* default use of "zfs send" won't encounter the bug mentioned above.
*/
#define DMU_BACKUP_FEATURE_SWITCH_TO_LARGE_BLOCKS (1 << 27)
/* flag #28 is reserved for a Nutanix feature */
/*
* flag #29 is the last unused bit. It is reserved to indicate a to-be-designed
* extension to the stream format which will accomodate more feature flags.
* If you need to add another feature flag, please reach out to the OpenZFS
* community, e.g., on GitHub or Slack.
*/
/*
* Mask of all supported backup features