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

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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>
This commit is contained in:
Mike Christie
2011-06-24 15:11:53 -05:00
committed by James Bottomley
parent 9d04516310
commit f457a46f17
4 changed files with 142 additions and 106 deletions
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16
include/linux/iscsi_boot_sysfs.h
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@@ -92,6 +92,13 @@ struct iscsi_boot_kobj {
* properties.
*/
mode_t (*is_visible) (void *data, int type);
/*
* Driver specific release function.
*
* The function should free the data passed in.
*/
void (*release) (void *data);
};
struct iscsi_boot_kset {
@@ -103,18 +110,21 @@ struct iscsi_boot_kobj *
iscsi_boot_create_initiator(struct iscsi_boot_kset *boot_kset, int index,
void *data,
ssize_t (*show) (void *data, int type, char *buf),
mode_t (*is_visible) (void *data, int type));
mode_t (*is_visible) (void *data, int type),
void (*release) (void *data));
struct iscsi_boot_kobj *
iscsi_boot_create_ethernet(struct iscsi_boot_kset *boot_kset, int index,
void *data,
ssize_t (*show) (void *data, int type, char *buf),
mode_t (*is_visible) (void *data, int type));
mode_t (*is_visible) (void *data, int type),
void (*release) (void *data));
struct iscsi_boot_kobj *
iscsi_boot_create_target(struct iscsi_boot_kset *boot_kset, int index,
void *data,
ssize_t (*show) (void *data, int type, char *buf),
mode_t (*is_visible) (void *data, int type));
mode_t (*is_visible) (void *data, int type),
void (*release) (void *data));
struct iscsi_boot_kset *iscsi_boot_create_kset(const char *set_name);
struct iscsi_boot_kset *iscsi_boot_create_host_kset(unsigned int hostno);