Currently when there is a reconfig, the uio_info->name
does not get updated to reflect the change in the dev_config
name change.
On restart tcmu-runner there will be a mismatch between
the dev_config string in uio and the tcmu structure that contains
the string. When this occurs it'll reload the one in uio
and you lose the reconfigured device path.
v2: Created a helper function for the updating of uio_info
v3: Free the old string
Signed-off-by: Bryant G. Ly <bryantly@xxxxxxxxxxxxxxxxxx>
---
drivers/target/target_core_user.c | 34 ++++++++++++++++++++++++++--------
1 file changed, 26 insertions(+), 8 deletions(-)
diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c
index 2f17d80..f699ef2 100644
--- a/drivers/target/target_core_user.c
+++ b/drivers/target/target_core_user.c
@@ -1419,19 +1419,14 @@ free_skb:
return ret;
}
-static int tcmu_configure_device(struct se_device *dev)
+static int tcmu_update_uio_info(struct tcmu_dev *udev)
{
- struct tcmu_dev *udev = TCMU_DEV(dev);
struct tcmu_hba *hba = udev->hba->hba_ptr;
struct uio_info *info;
- struct tcmu_mailbox *mb;
- size_t size;
- size_t used;
- int ret = 0;
+ size_t size, used;
char *str;
info = &udev->uio_info;
-
size = snprintf(NULL, 0, "tcm-user/%u/%s/%s", hba->host_id, udev->name,
udev->dev_config);
size += 1; /* for \0 */
@@ -1440,12 +1435,29 @@ static int tcmu_configure_device(struct se_device *dev)
return -ENOMEM;
used = snprintf(str, size, "tcm-user/%u/%s", hba->host_id, udev->name);
-
if (udev->dev_config[0])
snprintf(str + used, size - used, "/%s", udev->dev_config);
+ if (info->name)
+ kfree(info->name);
info->name = str;
+ return 0;
+}
+
+static int tcmu_configure_device(struct se_device *dev)
+{
+ struct tcmu_dev *udev = TCMU_DEV(dev);
+ struct uio_info *info;
+ struct tcmu_mailbox *mb;
+ int ret = 0;
+
+ ret = tcmu_update_uio_info(udev);
+ if (ret)
+ return ret;
+
+ info = &udev->uio_info;
+
udev->mb_addr = vzalloc(CMDR_SIZE);
if (!udev->mb_addr) {
ret = -ENOMEM;
@@ -1787,6 +1799,12 @@ static ssize_t tcmu_dev_config_store(struct config_item *item, const char *page,
pr_err("Unable to reconfigure device\n");
return ret;
}
+ strlcpy(udev->dev_config, page, TCMU_CONFIG_LEN);
+
+ ret = tcmu_update_uio_info(udev);
+ if (ret)
+ return ret;
+ return count;
}
strlcpy(udev->dev_config, page, TCMU_CONFIG_LEN);
--
2.5.4 (Apple Git-61)
--
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