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DMU_BACKUP_FEATURE: indicate that bit 28 and 29 are reserved

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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. * default use of "zfs send" won't encounter the bug mentioned above.
*/ */
#define DMU_BACKUP_FEATURE_SWITCH_TO_LARGE_BLOCKS (1 << 27) #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 * Mask of all supported backup features