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| author | Nicholas Bellinger <nab@linux-iscsi.org> | 2013-11-06 21:03:43 -0800 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2013-11-07 14:24:52 -0800 |
| commit | 5277797dc4ed873d067477d84e910b39d113f649 (patch) | |
| tree | 5e2aa87dec2cbcb5bbdfadd697c92e86b0e5aa11 /drivers/target/target_core_internal.h | |
| parent | c9e8d128fe316751230ee0c53478740c64f58436 (diff) | |
| download | op-kernel-dev-5277797dc4ed873d067477d84e910b39d113f649.zip op-kernel-dev-5277797dc4ed873d067477d84e910b39d113f649.tar.gz | |
target: Add percpu refcounting for se_lun access
This patch adds percpu refcounting for se_lun access that allows the
association of an se_lun + se_cmd in transport_lookup_cmd_lun() to
occur without an extra list_head for tracking outstanding I/O during
se_lun shutdown.
This effectively changes se_lun shutdown logic to wait for outstanding
I/O percpu references to complete in transport_lun_remove_cmd() using
se_lun->lun_ref_comp, instead of explicitly draining the per se_lun
command list and waiting for individual se_cmd descriptor processing
to complete.
Cc: Kent Overstreet <kmo@daterainc.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target/target_core_internal.h')
| -rw-r--r-- | drivers/target/target_core_internal.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/target/target_core_internal.h b/drivers/target/target_core_internal.h index 889af4d..47b63b0 100644 --- a/drivers/target/target_core_internal.h +++ b/drivers/target/target_core_internal.h @@ -100,7 +100,7 @@ int transport_dump_vpd_assoc(struct t10_vpd *, unsigned char *, int); int transport_dump_vpd_ident_type(struct t10_vpd *, unsigned char *, int); int transport_dump_vpd_ident(struct t10_vpd *, unsigned char *, int); bool target_stop_cmd(struct se_cmd *cmd, unsigned long *flags); -int transport_clear_lun_from_sessions(struct se_lun *); +int transport_clear_lun_ref(struct se_lun *); void transport_send_task_abort(struct se_cmd *); sense_reason_t target_cmd_size_check(struct se_cmd *cmd, unsigned int size); void target_qf_do_work(struct work_struct *work); |
