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[SCSI] iscsi_ibft, be2iscsi, iscsi_boot: fix boot kobj data lifetime …
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…management

be2iscsi passes the boot functions its phba object which is
allocated in the shost, but iscsi_ibft passes in a object
allocated for each item to display. The problem is that
iscsi_boot_sysfs was managing the lifetime of the object
passed in and doing a kfree on release. This causes a double
free for be2iscsi which frees the shost in its pci_remove.

This patch fixes the problem by adding a release callback
which the drivers can call kfree or a put() type of function
(needed for be2iscsi which will do a get/put on the shost).

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
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Mike Christie authored and James Bottomley committed Jun 29, 2011
1 parent 9d04516 commit f457a46
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Showing 4 changed files with 142 additions and 106 deletions.
14 changes: 11 additions & 3 deletions drivers/firmware/iscsi_ibft.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -566,6 +566,11 @@ static mode_t __init ibft_check_initiator_for(void *data, int type)
return rc;
}

static void ibft_kobj_release(void *data)
{
kfree(data);
}

/*
* Helper function for ibft_register_kobjects.
*/
Expand Down Expand Up @@ -595,7 +600,8 @@ static int __init ibft_create_kobject(struct acpi_table_ibft *header,
boot_kobj = iscsi_boot_create_initiator(boot_kset, hdr->index,
ibft_kobj,
ibft_attr_show_initiator,
ibft_check_initiator_for);
ibft_check_initiator_for,
ibft_kobj_release);
if (!boot_kobj) {
rc = -ENOMEM;
goto free_ibft_obj;
Expand All @@ -610,7 +616,8 @@ static int __init ibft_create_kobject(struct acpi_table_ibft *header,
boot_kobj = iscsi_boot_create_ethernet(boot_kset, hdr->index,
ibft_kobj,
ibft_attr_show_nic,
ibft_check_nic_for);
ibft_check_nic_for,
ibft_kobj_release);
if (!boot_kobj) {
rc = -ENOMEM;
goto free_ibft_obj;
Expand All @@ -625,7 +632,8 @@ static int __init ibft_create_kobject(struct acpi_table_ibft *header,
boot_kobj = iscsi_boot_create_target(boot_kset, hdr->index,
ibft_kobj,
ibft_attr_show_target,
ibft_check_tgt_for);
ibft_check_tgt_for,
ibft_kobj_release);
if (!boot_kobj) {
rc = -ENOMEM;
goto free_ibft_obj;
Expand Down
190 changes: 99 additions & 91 deletions drivers/scsi/be2iscsi/be_main.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -215,73 +215,62 @@ static int beiscsi_eh_device_reset(struct scsi_cmnd *sc)
static ssize_t beiscsi_show_boot_tgt_info(void *data, int type, char *buf)
{
struct beiscsi_hba *phba = data;
struct mgmt_session_info *boot_sess = &phba->boot_sess;
struct mgmt_conn_info *boot_conn = &boot_sess->conn_list[0];
char *str = buf;
int rc;

switch (type) {
case ISCSI_BOOT_TGT_NAME:
rc = sprintf(buf, "%.*s\n",
(int)strlen(phba->boot_sess.target_name),
(char *)&phba->boot_sess.target_name);
(int)strlen(boot_sess->target_name),
(char *)&boot_sess->target_name);
break;
case ISCSI_BOOT_TGT_IP_ADDR:
if (phba->boot_sess.conn_list[0].dest_ipaddr.ip_type == 0x1)
if (boot_conn->dest_ipaddr.ip_type == 0x1)
rc = sprintf(buf, "%pI4\n",
(char *)&phba->boot_sess.conn_list[0].
dest_ipaddr.ip_address);
(char *)&boot_conn->dest_ipaddr.ip_address);
else
rc = sprintf(str, "%pI6\n",
(char *)&phba->boot_sess.conn_list[0].
dest_ipaddr.ip_address);
(char *)&boot_conn->dest_ipaddr.ip_address);
break;
case ISCSI_BOOT_TGT_PORT:
rc = sprintf(str, "%d\n", phba->boot_sess.conn_list[0].
dest_port);
rc = sprintf(str, "%d\n", boot_conn->dest_port);
break;

case ISCSI_BOOT_TGT_CHAP_NAME:
rc = sprintf(str, "%.*s\n",
phba->boot_sess.conn_list[0].
negotiated_login_options.auth_data.chap.
target_chap_name_length,
(char *)&phba->boot_sess.conn_list[0].
negotiated_login_options.auth_data.chap.
target_chap_name);
boot_conn->negotiated_login_options.auth_data.chap.
target_chap_name_length,
(char *)&boot_conn->negotiated_login_options.
auth_data.chap.target_chap_name);
break;
case ISCSI_BOOT_TGT_CHAP_SECRET:
rc = sprintf(str, "%.*s\n",
phba->boot_sess.conn_list[0].
negotiated_login_options.auth_data.chap.
target_secret_length,
(char *)&phba->boot_sess.conn_list[0].
negotiated_login_options.auth_data.chap.
target_secret);

boot_conn->negotiated_login_options.auth_data.chap.
target_secret_length,
(char *)&boot_conn->negotiated_login_options.
auth_data.chap.target_secret);
break;
case ISCSI_BOOT_TGT_REV_CHAP_NAME:
rc = sprintf(str, "%.*s\n",
phba->boot_sess.conn_list[0].
negotiated_login_options.auth_data.chap.
intr_chap_name_length,
(char *)&phba->boot_sess.conn_list[0].
negotiated_login_options.auth_data.chap.
intr_chap_name);

boot_conn->negotiated_login_options.auth_data.chap.
intr_chap_name_length,
(char *)&boot_conn->negotiated_login_options.
auth_data.chap.intr_chap_name);
break;
case ISCSI_BOOT_TGT_REV_CHAP_SECRET:
rc = sprintf(str, "%.*s\n",
phba->boot_sess.conn_list[0].
negotiated_login_options.auth_data.chap.
intr_secret_length,
(char *)&phba->boot_sess.conn_list[0].
negotiated_login_options.auth_data.chap.
intr_secret);
rc = sprintf(str, "%.*s\n",
boot_conn->negotiated_login_options.auth_data.chap.
intr_secret_length,
(char *)&boot_conn->negotiated_login_options.
auth_data.chap.intr_secret);
break;
case ISCSI_BOOT_TGT_FLAGS:
rc = sprintf(str, "2\n");
rc = sprintf(str, "2\n");
break;
case ISCSI_BOOT_TGT_NIC_ASSOC:
rc = sprintf(str, "0\n");
rc = sprintf(str, "0\n");
break;
default:
rc = -ENOSYS;
Expand Down Expand Up @@ -315,10 +304,10 @@ static ssize_t beiscsi_show_boot_eth_info(void *data, int type, char *buf)

switch (type) {
case ISCSI_BOOT_ETH_FLAGS:
rc = sprintf(str, "2\n");
rc = sprintf(str, "2\n");
break;
case ISCSI_BOOT_ETH_INDEX:
rc = sprintf(str, "0\n");
rc = sprintf(str, "0\n");
break;
case ISCSI_BOOT_ETH_MAC:
rc = beiscsi_get_macaddr(buf, phba);
Expand Down Expand Up @@ -391,39 +380,6 @@ static mode_t beiscsi_eth_get_attr_visibility(void *data, int type)
return rc;
}

static int beiscsi_setup_boot_info(struct beiscsi_hba *phba)
{
struct iscsi_boot_kobj *boot_kobj;

phba->boot_kset = iscsi_boot_create_host_kset(phba->shost->host_no);
if (!phba->boot_kset)
return -ENOMEM;

/* get boot info using mgmt cmd */
boot_kobj = iscsi_boot_create_target(phba->boot_kset, 0, phba,
beiscsi_show_boot_tgt_info,
beiscsi_tgt_get_attr_visibility);
if (!boot_kobj)
goto free_kset;

boot_kobj = iscsi_boot_create_initiator(phba->boot_kset, 0, phba,
beiscsi_show_boot_ini_info,
beiscsi_ini_get_attr_visibility);
if (!boot_kobj)
goto free_kset;

boot_kobj = iscsi_boot_create_ethernet(phba->boot_kset, 0, phba,
beiscsi_show_boot_eth_info,
beiscsi_eth_get_attr_visibility);
if (!boot_kobj)
goto free_kset;
return 0;

free_kset:
iscsi_boot_destroy_kset(phba->boot_kset);
return -ENOMEM;
}

/*------------------- PCI Driver operations and data ----------------- */
static DEFINE_PCI_DEVICE_TABLE(beiscsi_pci_id_table) = {
{ PCI_DEVICE(BE_VENDOR_ID, BE_DEVICE_ID1) },
Expand Down Expand Up @@ -482,14 +438,6 @@ static struct beiscsi_hba *beiscsi_hba_alloc(struct pci_dev *pcidev)
if (iscsi_host_add(shost, &phba->pcidev->dev))
goto free_devices;

if (beiscsi_setup_boot_info(phba))
/*
* log error but continue, because we may not be using
* iscsi boot.
*/
shost_printk(KERN_ERR, phba->shost, "Could not set up "
"iSCSI boot info.");

return phba;

free_devices:
Expand Down Expand Up @@ -3510,6 +3458,7 @@ static int beiscsi_get_boot_info(struct beiscsi_hba *phba)
unsigned int tag, wrb_num;
unsigned short status, extd_status;
struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q;
int ret = -ENOMEM;

tag = beiscsi_get_boot_target(phba);
if (!tag) {
Expand All @@ -3534,8 +3483,7 @@ static int beiscsi_get_boot_info(struct beiscsi_hba *phba)
boot_resp = embedded_payload(wrb);

if (boot_resp->boot_session_handle < 0) {
printk(KERN_ERR "No Boot Session for this pci_func,"
"session Hndl = %d\n", boot_resp->boot_session_handle);
shost_printk(KERN_INFO, phba->shost, "No Boot Session.\n");
return -ENXIO;
}

Expand Down Expand Up @@ -3573,14 +3521,70 @@ static int beiscsi_get_boot_info(struct beiscsi_hba *phba)
wrb = queue_get_wrb(mccq, wrb_num);
free_mcc_tag(&phba->ctrl, tag);
session_resp = nonemb_cmd.va ;

memcpy(&phba->boot_sess, &session_resp->session_info,
sizeof(struct mgmt_session_info));
pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
nonemb_cmd.va, nonemb_cmd.dma);
return 0;
ret = 0;

boot_freemem:
pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
nonemb_cmd.va, nonemb_cmd.dma);
return ret;
}

static void beiscsi_boot_release(void *data)
{
struct beiscsi_hba *phba = data;

scsi_host_put(phba->shost);
}

static int beiscsi_setup_boot_info(struct beiscsi_hba *phba)
{
struct iscsi_boot_kobj *boot_kobj;

/* get boot info using mgmt cmd */
if (beiscsi_get_boot_info(phba))
/* Try to see if we can carry on without this */
return 0;

phba->boot_kset = iscsi_boot_create_host_kset(phba->shost->host_no);
if (!phba->boot_kset)
return -ENOMEM;

/* get a ref because the show function will ref the phba */
if (!scsi_host_get(phba->shost))
goto free_kset;
boot_kobj = iscsi_boot_create_target(phba->boot_kset, 0, phba,
beiscsi_show_boot_tgt_info,
beiscsi_tgt_get_attr_visibility,
beiscsi_boot_release);
if (!boot_kobj)
goto put_shost;

if (!scsi_host_get(phba->shost))
goto free_kset;
boot_kobj = iscsi_boot_create_initiator(phba->boot_kset, 0, phba,
beiscsi_show_boot_ini_info,
beiscsi_ini_get_attr_visibility,
beiscsi_boot_release);
if (!boot_kobj)
goto put_shost;

if (!scsi_host_get(phba->shost))
goto free_kset;
boot_kobj = iscsi_boot_create_ethernet(phba->boot_kset, 0, phba,
beiscsi_show_boot_eth_info,
beiscsi_eth_get_attr_visibility,
beiscsi_boot_release);
if (!boot_kobj)
goto put_shost;
return 0;

put_shost:
scsi_host_put(phba->shost);
free_kset:
iscsi_boot_destroy_kset(phba->boot_kset);
return -ENOMEM;
}

Expand Down Expand Up @@ -4307,11 +4311,15 @@ static int __devinit beiscsi_dev_probe(struct pci_dev *pcidev,
goto free_blkenbld;
}
hwi_enable_intr(phba);
ret = beiscsi_get_boot_info(phba);
if (ret < 0) {
shost_printk(KERN_ERR, phba->shost, "beiscsi_dev_probe-"
"No Boot Devices !!!!!\n");
}

if (beiscsi_setup_boot_info(phba))
/*
* log error but continue, because we may not be using
* iscsi boot.
*/
shost_printk(KERN_ERR, phba->shost, "Could not set up "
"iSCSI boot info.");

SE_DEBUG(DBG_LVL_8, "\n\n\n SUCCESS - DRIVER LOADED\n\n\n");
return 0;

Expand Down
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