diff options
author | Nicholas Bellinger <nab@linux-iscsi.org> | 2011-11-22 21:41:54 -0800 |
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committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2011-12-14 11:42:08 +0000 |
commit | 4355a9110eeb2eaf1dd44fcab16ccbd1c8c5fad4 (patch) | |
tree | 6cfb4d1fc3cb5c71f67ab158ab41430cfe7a6e0c /drivers | |
parent | a63607855224702ea17e6016ecf3f7d544e83625 (diff) | |
download | op-kernel-dev-4355a9110eeb2eaf1dd44fcab16ccbd1c8c5fad4.zip op-kernel-dev-4355a9110eeb2eaf1dd44fcab16ccbd1c8c5fad4.tar.gz |
tcm_fc: Convert ft_send_work to use target_submit_cmd
This patch converts the main ft_send_work() I/O path to use
target_submit_cmd() with a single se_cmd->cmd_kref reference
that is released via the existing ft_check_stop_free() response
path callback.
It also makes ft_send_tm() use transport_init_se_cmd() and
target_get_sess_cmd() to also use single se_cmd->cmd_kref
reference.
Cc: Christoph Hellwig <hch@lst.de>
Cc: Kiran Patil <kiran.patil@intel.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/target/tcm_fc/tfc_cmd.c | 51 |
1 files changed, 13 insertions, 38 deletions
diff --git a/drivers/target/tcm_fc/tfc_cmd.c b/drivers/target/tcm_fc/tfc_cmd.c index dbbbc83..addc18f 100644 --- a/drivers/target/tcm_fc/tfc_cmd.c +++ b/drivers/target/tcm_fc/tfc_cmd.c @@ -363,6 +363,11 @@ static void ft_send_tm(struct ft_cmd *cmd) struct ft_sess *sess; u8 tm_func; + transport_init_se_cmd(&cmd->se_cmd, &ft_configfs->tf_ops, + cmd->sess->se_sess, 0, DMA_NONE, 0, + &cmd->ft_sense_buffer[0]); + target_get_sess_cmd(cmd->sess->se_sess, &cmd->se_cmd, false); + fcp = fc_frame_payload_get(cmd->req_frame, sizeof(*fcp)); switch (fcp->fc_tm_flags) { @@ -416,7 +421,6 @@ static void ft_send_tm(struct ft_cmd *cmd) sess = cmd->sess; transport_send_check_condition_and_sense(&cmd->se_cmd, cmd->se_cmd.scsi_sense_reason, 0); - transport_generic_free_cmd(&cmd->se_cmd, 0); ft_sess_put(sess); return; } @@ -532,7 +536,6 @@ static void ft_send_work(struct work_struct *work) { struct ft_cmd *cmd = container_of(work, struct ft_cmd, work); struct fc_frame_header *fh = fc_frame_header_get(cmd->req_frame); - struct se_cmd *se_cmd; struct fcp_cmnd *fcp; int data_dir = 0; u32 data_len; @@ -587,15 +590,6 @@ static void ft_send_work(struct work_struct *work) data_len = ntohl(fcp->fc_dl); cmd->cdb = fcp->fc_cdb; } - - se_cmd = &cmd->se_cmd; - /* - * Initialize struct se_cmd descriptor from target_core_mod - * infrastructure - */ - transport_init_se_cmd(se_cmd, &ft_configfs->tf_ops, cmd->sess->se_sess, - data_len, data_dir, task_attr, - &cmd->ft_sense_buffer[0]); /* * Check for FCP task management flags */ @@ -603,39 +597,20 @@ static void ft_send_work(struct work_struct *work) ft_send_tm(cmd); return; } - fc_seq_exch(cmd->seq)->lp->tt.seq_set_resp(cmd->seq, ft_recv_seq, cmd); - cmd->lun = scsilun_to_int((struct scsi_lun *)fcp->fc_lun); - ret = transport_lookup_cmd_lun(&cmd->se_cmd, cmd->lun); + /* + * Use a single se_cmd->cmd_kref as we expect to release se_cmd + * directly from ft_check_stop_free callback in response path. + */ + ret = target_submit_cmd(&cmd->se_cmd, cmd->sess->se_sess, cmd->cdb, + &cmd->ft_sense_buffer[0], cmd->lun, data_len, + task_attr, data_dir, 0); + pr_debug("r_ctl %x alloc target_submit_cmd %d\n", fh->fh_r_ctl, ret); if (ret < 0) { ft_dump_cmd(cmd, __func__); - transport_send_check_condition_and_sense(&cmd->se_cmd, - cmd->se_cmd.scsi_sense_reason, 0); - return; - } - - ret = transport_generic_allocate_tasks(se_cmd, cmd->cdb); - - pr_debug("r_ctl %x alloc task ret %d\n", fh->fh_r_ctl, ret); - ft_dump_cmd(cmd, __func__); - - if (ret == -ENOMEM) { - transport_send_check_condition_and_sense(se_cmd, - TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, 0); - transport_generic_free_cmd(se_cmd, 0); - return; - } - if (ret == -EINVAL) { - if (se_cmd->se_cmd_flags & SCF_SCSI_RESERVATION_CONFLICT) - ft_queue_status(se_cmd); - else - transport_send_check_condition_and_sense(se_cmd, - se_cmd->scsi_sense_reason, 0); - transport_generic_free_cmd(se_cmd, 0); return; } - transport_handle_cdb_direct(se_cmd); return; err: |