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assertion in arc_release() during encrypted receive

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In the existing code, when doing a raw (encrypted) zfs receive, 
we call arc_convert_to_raw() from open context. This creates a 
race condition between arc_release()/arc_change_state() and 
writing out the block from syncing context (arc_write_ready/done()).

This change makes it so that when we are doing a raw (encrypted) 
zfs receive, we save the crypt parameters (salt, iv, mac) of dnode 
blocks in the dbuf_dirty_record_t, and call arc_convert_to_raw() 
from syncing context when writing out the block of dnodes.

Additionally, we can eliminate dr_raw and associated setters, and 
instead know that dnode blocks are always raw when doing a zfs 
receive (see the new field os_raw_receive).

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tom Caputi <tcaputi@datto.com>
Signed-off-by: Matthew Ahrens <mahrens@delphix.com>
Closes #7424 
Closes #7429
This commit is contained in:
Matthew Ahrens
2018-04-17 11:06:54 -07:00
committed by Brian Behlendorf
parent b40d45bc6c
commit 0c03d21ac9
7 changed files with 105 additions and 218 deletions
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include/sys/dbuf.h
+10 -1
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@@ -147,7 +147,16 @@ typedef struct dbuf_dirty_record {
override_states_t dr_override_state;
uint8_t dr_copies;
boolean_t dr_nopwrite;
boolean_t dr_raw;
boolean_t dr_has_raw_params;
/*
* If dr_has_raw_params is set, the following crypt
* params will be set on the BP that's written.
*/
boolean_t dr_byteorder;
uint8_t dr_salt[ZIO_DATA_SALT_LEN];
uint8_t dr_iv[ZIO_DATA_IV_LEN];
uint8_t dr_mac[ZIO_DATA_MAC_LEN];
} dl;
} dt;
} dbuf_dirty_record_t;