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-rw-r--r--drivers/target/iscsi/iscsi_target.c4
-rw-r--r--drivers/target/target_core_configfs.c9
-rw-r--r--drivers/target/target_core_hba.c10
-rw-r--r--drivers/target/target_core_iblock.c21
-rw-r--r--drivers/target/target_core_pscsi.c6
-rw-r--r--drivers/target/target_core_spc.c44
6 files changed, 54 insertions, 40 deletions
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index cd77a064c772..fd092909a457 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -968,9 +968,9 @@ int iscsit_setup_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
cmd->cmd_flags |= ICF_NON_IMMEDIATE_UNSOLICITED_DATA;
conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt;
- if (hdr->flags & ISCSI_FLAG_CMD_READ) {
+ if (hdr->flags & ISCSI_FLAG_CMD_READ)
cmd->targ_xfer_tag = session_get_next_ttt(conn->sess);
- } else if (hdr->flags & ISCSI_FLAG_CMD_WRITE)
+ else
cmd->targ_xfer_tag = 0xFFFFFFFF;
cmd->cmd_sn = be32_to_cpu(hdr->cmdsn);
cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn);
diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c
index c2e9fea90b4a..860e84046177 100644
--- a/drivers/target/target_core_configfs.c
+++ b/drivers/target/target_core_configfs.c
@@ -457,8 +457,15 @@ void target_unregister_template(const struct target_core_fabric_ops *fo)
if (!strcmp(t->tf_ops->name, fo->name)) {
BUG_ON(atomic_read(&t->tf_access_cnt));
list_del(&t->tf_list);
+ mutex_unlock(&g_tf_lock);
+ /*
+ * Wait for any outstanding fabric se_deve_entry->rcu_head
+ * callbacks to complete post kfree_rcu(), before allowing
+ * fabric driver unload of TFO->module to proceed.
+ */
+ rcu_barrier();
kfree(t);
- break;
+ return;
}
}
mutex_unlock(&g_tf_lock);
diff --git a/drivers/target/target_core_hba.c b/drivers/target/target_core_hba.c
index 62ea4e8e70a8..be9cefc07407 100644
--- a/drivers/target/target_core_hba.c
+++ b/drivers/target/target_core_hba.c
@@ -84,8 +84,16 @@ void target_backend_unregister(const struct target_backend_ops *ops)
list_for_each_entry(tb, &backend_list, list) {
if (tb->ops == ops) {
list_del(&tb->list);
+ mutex_unlock(&backend_mutex);
+ /*
+ * Wait for any outstanding backend driver ->rcu_head
+ * callbacks to complete post TBO->free_device() ->
+ * call_rcu(), before allowing backend driver module
+ * unload of target_backend_ops->owner to proceed.
+ */
+ rcu_barrier();
kfree(tb);
- break;
+ return;
}
}
mutex_unlock(&backend_mutex);
diff --git a/drivers/target/target_core_iblock.c b/drivers/target/target_core_iblock.c
index 6d88d24e6cce..5a9982f5d5d6 100644
--- a/drivers/target/target_core_iblock.c
+++ b/drivers/target/target_core_iblock.c
@@ -306,20 +306,13 @@ static void iblock_complete_cmd(struct se_cmd *cmd)
kfree(ibr);
}
-static void iblock_bio_done(struct bio *bio, int err)
+static void iblock_bio_done(struct bio *bio)
{
struct se_cmd *cmd = bio->bi_private;
struct iblock_req *ibr = cmd->priv;
- /*
- * Set -EIO if !BIO_UPTODATE and the passed is still err=0
- */
- if (!test_bit(BIO_UPTODATE, &bio->bi_flags) && !err)
- err = -EIO;
-
- if (err != 0) {
- pr_err("test_bit(BIO_UPTODATE) failed for bio: %p,"
- " err: %d\n", bio, err);
+ if (bio->bi_error) {
+ pr_err("bio error: %p, err: %d\n", bio, bio->bi_error);
/*
* Bump the ib_bio_err_cnt and release bio.
*/
@@ -370,15 +363,15 @@ static void iblock_submit_bios(struct bio_list *list, int rw)
blk_finish_plug(&plug);
}
-static void iblock_end_io_flush(struct bio *bio, int err)
+static void iblock_end_io_flush(struct bio *bio)
{
struct se_cmd *cmd = bio->bi_private;
- if (err)
- pr_err("IBLOCK: cache flush failed: %d\n", err);
+ if (bio->bi_error)
+ pr_err("IBLOCK: cache flush failed: %d\n", bio->bi_error);
if (cmd) {
- if (err)
+ if (bio->bi_error)
target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION);
else
target_complete_cmd(cmd, SAM_STAT_GOOD);
diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c
index 08e9084ee615..de18790eb21c 100644
--- a/drivers/target/target_core_pscsi.c
+++ b/drivers/target/target_core_pscsi.c
@@ -852,7 +852,7 @@ static ssize_t pscsi_show_configfs_dev_params(struct se_device *dev, char *b)
return bl;
}
-static void pscsi_bi_endio(struct bio *bio, int error)
+static void pscsi_bi_endio(struct bio *bio)
{
bio_put(bio);
}
@@ -973,7 +973,7 @@ fail:
while (*hbio) {
bio = *hbio;
*hbio = (*hbio)->bi_next;
- bio_endio(bio, 0); /* XXX: should be error */
+ bio_endio(bio);
}
return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
}
@@ -1061,7 +1061,7 @@ fail_free_bio:
while (hbio) {
struct bio *bio = hbio;
hbio = hbio->bi_next;
- bio_endio(bio, 0); /* XXX: should be error */
+ bio_endio(bio);
}
ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
fail:
diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c
index b5ba1ec3c354..f87d4cef6d39 100644
--- a/drivers/target/target_core_spc.c
+++ b/drivers/target/target_core_spc.c
@@ -1203,17 +1203,13 @@ sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd)
struct se_dev_entry *deve;
struct se_session *sess = cmd->se_sess;
struct se_node_acl *nacl;
+ struct scsi_lun slun;
unsigned char *buf;
u32 lun_count = 0, offset = 8;
-
- if (cmd->data_length < 16) {
- pr_warn("REPORT LUNS allocation length %u too small\n",
- cmd->data_length);
- return TCM_INVALID_CDB_FIELD;
- }
+ __be32 len;
buf = transport_kmap_data_sg(cmd);
- if (!buf)
+ if (cmd->data_length && !buf)
return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
/*
@@ -1221,11 +1217,9 @@ sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd)
* coming via a target_core_mod PASSTHROUGH op, and not through
* a $FABRIC_MOD. In that case, report LUN=0 only.
*/
- if (!sess) {
- int_to_scsilun(0, (struct scsi_lun *)&buf[offset]);
- lun_count = 1;
+ if (!sess)
goto done;
- }
+
nacl = sess->se_node_acl;
rcu_read_lock();
@@ -1236,10 +1230,12 @@ sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd)
* See SPC2-R20 7.19.
*/
lun_count++;
- if ((offset + 8) > cmd->data_length)
+ if (offset >= cmd->data_length)
continue;
- int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]);
+ int_to_scsilun(deve->mapped_lun, &slun);
+ memcpy(buf + offset, &slun,
+ min(8u, cmd->data_length - offset));
offset += 8;
}
rcu_read_unlock();
@@ -1248,12 +1244,22 @@ sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd)
* See SPC3 r07, page 159.
*/
done:
- lun_count *= 8;
- buf[0] = ((lun_count >> 24) & 0xff);
- buf[1] = ((lun_count >> 16) & 0xff);
- buf[2] = ((lun_count >> 8) & 0xff);
- buf[3] = (lun_count & 0xff);
- transport_kunmap_data_sg(cmd);
+ /*
+ * If no LUNs are accessible, report virtual LUN 0.
+ */
+ if (lun_count == 0) {
+ int_to_scsilun(0, &slun);
+ if (cmd->data_length > 8)
+ memcpy(buf + offset, &slun,
+ min(8u, cmd->data_length - offset));
+ lun_count = 1;
+ }
+
+ if (buf) {
+ len = cpu_to_be32(lun_count * 8);
+ memcpy(buf, &len, min_t(int, sizeof len, cmd->data_length));
+ transport_kunmap_data_sg(cmd);
+ }
target_complete_cmd_with_length(cmd, GOOD, 8 + lun_count * 8);
return 0;
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