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iscsi-target: Convert gfp_t parameter to task state bitmask
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This patch propigates the use of task state bitmask now used by
percpu_ida_alloc() up the iscsi-target callchain, replacing the
use of GFP_ATOMIC for TASK_RUNNING, and GFP_KERNEL for
TASK_INTERRUPTIBLE.

Also, drop the unnecessary gfp_t parameter to isert_allocate_cmd(),
and just pass TASK_INTERRUPTIBLE into iscsit_allocate_cmd().

Signed-off-by: Nicholas Bellinger <[email protected]>
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Nicholas Bellinger committed Jan 25, 2014
1 parent 555b270 commit 676687c
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Showing 5 changed files with 19 additions and 20 deletions.
14 changes: 7 additions & 7 deletions drivers/infiniband/ulp/isert/ib_isert.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -1028,13 +1028,13 @@ isert_rx_login_req(struct iser_rx_desc *rx_desc, int rx_buflen,
}

static struct iscsi_cmd
*isert_allocate_cmd(struct iscsi_conn *conn, gfp_t gfp)
*isert_allocate_cmd(struct iscsi_conn *conn)
{
struct isert_conn *isert_conn = (struct isert_conn *)conn->context;
struct isert_cmd *isert_cmd;
struct iscsi_cmd *cmd;

cmd = iscsit_allocate_cmd(conn, gfp);
cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE);
if (!cmd) {
pr_err("Unable to allocate iscsi_cmd + isert_cmd\n");
return NULL;
Expand Down Expand Up @@ -1223,7 +1223,7 @@ isert_rx_opcode(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc,

switch (opcode) {
case ISCSI_OP_SCSI_CMD:
cmd = isert_allocate_cmd(conn, GFP_KERNEL);
cmd = isert_allocate_cmd(conn);
if (!cmd)
break;

Expand All @@ -1237,7 +1237,7 @@ isert_rx_opcode(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc,
rx_desc, (unsigned char *)hdr);
break;
case ISCSI_OP_NOOP_OUT:
cmd = isert_allocate_cmd(conn, GFP_KERNEL);
cmd = isert_allocate_cmd(conn);
if (!cmd)
break;

Expand All @@ -1250,15 +1250,15 @@ isert_rx_opcode(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc,
(unsigned char *)hdr);
break;
case ISCSI_OP_SCSI_TMFUNC:
cmd = isert_allocate_cmd(conn, GFP_KERNEL);
cmd = isert_allocate_cmd(conn);
if (!cmd)
break;

ret = iscsit_handle_task_mgt_cmd(conn, cmd,
(unsigned char *)hdr);
break;
case ISCSI_OP_LOGOUT:
cmd = isert_allocate_cmd(conn, GFP_KERNEL);
cmd = isert_allocate_cmd(conn);
if (!cmd)
break;

Expand All @@ -1269,7 +1269,7 @@ isert_rx_opcode(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc,
HZ);
break;
case ISCSI_OP_TEXT:
cmd = isert_allocate_cmd(conn, GFP_KERNEL);
cmd = isert_allocate_cmd(conn);
if (!cmd)
break;

Expand Down
14 changes: 7 additions & 7 deletions drivers/target/iscsi/iscsi_target.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -621,7 +621,7 @@ static int iscsit_add_reject(
{
struct iscsi_cmd *cmd;

cmd = iscsit_allocate_cmd(conn, GFP_KERNEL);
cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE);
if (!cmd)
return -1;

Expand Down Expand Up @@ -2476,7 +2476,7 @@ static void iscsit_build_conn_drop_async_message(struct iscsi_conn *conn)
if (!conn_p)
return;

cmd = iscsit_allocate_cmd(conn_p, GFP_ATOMIC);
cmd = iscsit_allocate_cmd(conn_p, TASK_RUNNING);
if (!cmd) {
iscsit_dec_conn_usage_count(conn_p);
return;
Expand Down Expand Up @@ -3952,7 +3952,7 @@ static int iscsi_target_rx_opcode(struct iscsi_conn *conn, unsigned char *buf)

switch (hdr->opcode & ISCSI_OPCODE_MASK) {
case ISCSI_OP_SCSI_CMD:
cmd = iscsit_allocate_cmd(conn, GFP_KERNEL);
cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE);
if (!cmd)
goto reject;

Expand All @@ -3964,28 +3964,28 @@ static int iscsi_target_rx_opcode(struct iscsi_conn *conn, unsigned char *buf)
case ISCSI_OP_NOOP_OUT:
cmd = NULL;
if (hdr->ttt == cpu_to_be32(0xFFFFFFFF)) {
cmd = iscsit_allocate_cmd(conn, GFP_KERNEL);
cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE);
if (!cmd)
goto reject;
}
ret = iscsit_handle_nop_out(conn, cmd, buf);
break;
case ISCSI_OP_SCSI_TMFUNC:
cmd = iscsit_allocate_cmd(conn, GFP_KERNEL);
cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE);
if (!cmd)
goto reject;

ret = iscsit_handle_task_mgt_cmd(conn, cmd, buf);
break;
case ISCSI_OP_TEXT:
cmd = iscsit_allocate_cmd(conn, GFP_KERNEL);
cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE);
if (!cmd)
goto reject;

ret = iscsit_handle_text_cmd(conn, cmd, buf);
break;
case ISCSI_OP_LOGOUT:
cmd = iscsit_allocate_cmd(conn, GFP_KERNEL);
cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE);
if (!cmd)
goto reject;

Expand Down
7 changes: 3 additions & 4 deletions drivers/target/iscsi/iscsi_target_util.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -152,12 +152,11 @@ void iscsit_free_r2ts_from_list(struct iscsi_cmd *cmd)
* May be called from software interrupt (timer) context for allocating
* iSCSI NopINs.
*/
struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *conn, gfp_t gfp_mask)
struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *conn, int state)
{
struct iscsi_cmd *cmd;
struct se_session *se_sess = conn->sess->se_sess;
int size, tag, state = (gfp_mask & __GFP_WAIT) ? TASK_INTERRUPTIBLE :
TASK_RUNNING;
int size, tag;

tag = percpu_ida_alloc(&se_sess->sess_tag_pool, state);
if (tag < 0)
Expand Down Expand Up @@ -930,7 +929,7 @@ static int iscsit_add_nopin(struct iscsi_conn *conn, int want_response)
u8 state;
struct iscsi_cmd *cmd;

cmd = iscsit_allocate_cmd(conn, GFP_ATOMIC);
cmd = iscsit_allocate_cmd(conn, TASK_RUNNING);
if (!cmd)
return -1;

Expand Down
2 changes: 1 addition & 1 deletion drivers/target/iscsi/iscsi_target_util.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -9,7 +9,7 @@ extern struct iscsi_r2t *iscsit_get_r2t_from_list(struct iscsi_cmd *);
extern void iscsit_free_r2t(struct iscsi_r2t *, struct iscsi_cmd *);
extern void iscsit_free_r2ts_from_list(struct iscsi_cmd *);
extern struct iscsi_cmd *iscsit_alloc_cmd(struct iscsi_conn *, gfp_t);
extern struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *, gfp_t);
extern struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *, int);
extern struct iscsi_seq *iscsit_get_seq_holder_for_datain(struct iscsi_cmd *, u32);
extern struct iscsi_seq *iscsit_get_seq_holder_for_r2t(struct iscsi_cmd *);
extern struct iscsi_r2t *iscsit_get_holder_for_r2tsn(struct iscsi_cmd *, u32);
Expand Down
2 changes: 1 addition & 1 deletion include/target/iscsi/iscsi_transport.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -94,7 +94,7 @@ extern int iscsit_tmr_post_handler(struct iscsi_cmd *, struct iscsi_conn *);
/*
* From iscsi_target_util.c
*/
extern struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *, gfp_t);
extern struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *, int);
extern int iscsit_sequence_cmd(struct iscsi_conn *, struct iscsi_cmd *,
unsigned char *, __be32);
extern void iscsit_release_cmd(struct iscsi_cmd *);

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