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target: Fix target_submit_tmr se_tmr_req allocation failures 

This patch makes target_submit_tmr() se_tmr_req allocation occur before
target_get_sess_cmd(), and changes target_submit_tmr() to return a failure
w/ non zero status to the fabric caller upon core_tmr_alloc_req() failure.

Cc: Andy Grover <agrover@redhat.com>
Cc: Kiran Patil <kiran.patil@intel.com>
Cc: Arun Easi <arun.easi@qlogic.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Nicholas Bellinger 2012-02-25 01:40:24 -08:00
parent 3de55ec74a
commit c7042cae58
2 changed files with 12 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/target/target_core_transport.c
View File

@ -1704,11 +1704,12 @@ EXPORT_SYMBOL(target_submit_cmd);
* @unpacked_lun: unpacked LUN to reference for struct se_lun * @unpacked_lun: unpacked LUN to reference for struct se_lun
* @fabric_context: fabric context for TMR req * @fabric_context: fabric context for TMR req
* @tm_type: Type of TM request * @tm_type: Type of TM request
* @flags: submit cmd flags
* *
* Callable from all contexts. * Callable from all contexts.
**/ **/
void target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess, int target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess,
unsigned char *sense, u32 unpacked_lun, unsigned char *sense, u32 unpacked_lun,
void *fabric_tmr_ptr, unsigned char tm_type, int flags) void *fabric_tmr_ptr, unsigned char tm_type, int flags)
{ {
@ -1720,25 +1721,26 @@ void target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess,
transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess,
0, DMA_NONE, MSG_SIMPLE_TAG, sense); 0, DMA_NONE, MSG_SIMPLE_TAG, sense);
/*
* FIXME: Currently expect caller to handle se_cmd->se_tmr_req
* allocation failure.
*/
ret = core_tmr_alloc_req(se_cmd, fabric_tmr_ptr, tm_type, GFP_KERNEL);
if (ret < 0)
return -ENOMEM;
/* See target_submit_cmd for commentary */ /* See target_submit_cmd for commentary */
target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF)); target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF));
ret = core_tmr_alloc_req(se_cmd, fabric_tmr_ptr, tm_type, GFP_KERNEL);
if (ret < 0) {
dump_stack();
/* FIXME XXX */
return;
}
ret = transport_lookup_tmr_lun(se_cmd, unpacked_lun); ret = transport_lookup_tmr_lun(se_cmd, unpacked_lun);
if (ret) { if (ret) {
se_cmd->se_tmr_req->response = TMR_LUN_DOES_NOT_EXIST; se_cmd->se_tmr_req->response = TMR_LUN_DOES_NOT_EXIST;
se_cmd->se_tfo->queue_tm_rsp(se_cmd); se_cmd->se_tfo->queue_tm_rsp(se_cmd);
transport_generic_free_cmd(se_cmd, 0); transport_generic_free_cmd(se_cmd, 0);
return; return 0;
} }
transport_generic_handle_tmr(se_cmd); transport_generic_handle_tmr(se_cmd);
return 0;
} }
EXPORT_SYMBOL(target_submit_tmr); EXPORT_SYMBOL(target_submit_tmr);

2
include/target/target_core_fabric.h
View File

@ -116,7 +116,7 @@ int transport_lookup_cmd_lun(struct se_cmd *, u32);
int transport_generic_allocate_tasks(struct se_cmd *, unsigned char *); int transport_generic_allocate_tasks(struct se_cmd *, unsigned char *);
void target_submit_cmd(struct se_cmd *, struct se_session *, unsigned char *, void target_submit_cmd(struct se_cmd *, struct se_session *, unsigned char *,
unsigned char *, u32, u32, int, int, int); unsigned char *, u32, u32, int, int, int);
void target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess, int target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess,
unsigned char *sense, u32 unpacked_lun, unsigned char *sense, u32 unpacked_lun,
void *fabric_tmr_ptr, unsigned char tm_type, int flags); void *fabric_tmr_ptr, unsigned char tm_type, int flags);
int transport_handle_cdb_direct(struct se_cmd *); int transport_handle_cdb_direct(struct se_cmd *);