diff options
author | Brian Behlendorf <[email protected]> | 2018-10-08 14:58:21 -0700 |
---|---|---|
committer | Brian Behlendorf <[email protected]> | 2018-10-09 10:05:48 -0700 |
commit | d7e4b30a672c1d7eb77dbbe2cdcf14cac102839a (patch) | |
tree | e9d61baf611a5479fd047b7170b67ea57dd2abf7 /module/zfs/spa_config.c | |
parent | 4cbde2ecbf7c6478bac106fadd6a23f53d538262 (diff) |
Add zfs_refcount_transfer_ownership_many()
When debugging is enabled and a zfs_refcount_t contains multiple holders
using the same key, but different ref_counts, the wrong reference_t may
be transferred. Add a zfs_refcount_transfer_ownership_many() function,
like the existing zfs_refcount_*_many() functions, to match and transfer
the correct refcount_t;
This issue may occur when using encryption with refcount debugging
enabled. An arc_buf_hdr_t can have references for both the
hdr->b_l1hdr.b_pabd and hdr->b_crypt_hdr.b_rabd both of which use
the hdr as the reference holder. When unsharing the buffer the
p_abd should be transferred.
This issue does not impact production builds because refcount holders
are not tracked.
Reviewed-by: Matthew Ahrens <[email protected]>
Signed-off-by: Tom Caputi <[email protected]>
Signed-off-by: Brian Behlendorf <[email protected]>
Closes #7219
Closes #8000
Diffstat (limited to 'module/zfs/spa_config.c')
0 files changed, 0 insertions, 0 deletions