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authorMike Christie <mchristi@redhat.com>2017-06-23 01:18:17 -0500
committerNicholas Bellinger <nab@linux-iscsi.org>2017-07-06 23:11:40 -0700
commit6906d008b4b06e42cad393ac25bec76fbf31fabd (patch)
tree9f53be37fb763fd62de9151c44e1462c2599ac9b /drivers/target
parentb1943fd454d1a2e2c8018a2f79a7023893619439 (diff)
downloadlinux-6906d008b4b06e42cad393ac25bec76fbf31fabd.tar.bz2
xcopy: loop over devices using idr helper
This converts the xcopy code to use the idr helper. The next patch will drop the g_device_list and make g_device_mutex local to the target_core_device.c file. Signed-off-by: Mike Christie <mchristi@redhat.com> Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target')
-rw-r--r--drivers/target/target_core_xcopy.c70
1 files changed, 41 insertions, 29 deletions
diff --git a/drivers/target/target_core_xcopy.c b/drivers/target/target_core_xcopy.c
index 56738a41e346..9ee89e00cd77 100644
--- a/drivers/target/target_core_xcopy.c
+++ b/drivers/target/target_core_xcopy.c
@@ -55,48 +55,60 @@ static int target_xcopy_gen_naa_ieee(struct se_device *dev, unsigned char *buf)
return 0;
}
-static int target_xcopy_locate_se_dev_e4(const unsigned char *dev_wwn,
- struct se_device **found_dev)
+struct xcopy_dev_search_info {
+ const unsigned char *dev_wwn;
+ struct se_device *found_dev;
+};
+
+static int target_xcopy_locate_se_dev_e4_iter(struct se_device *se_dev,
+ void *data)
{
- struct se_device *se_dev;
+ struct xcopy_dev_search_info *info = data;
unsigned char tmp_dev_wwn[XCOPY_NAA_IEEE_REGEX_LEN];
int rc;
- mutex_lock(&g_device_mutex);
- list_for_each_entry(se_dev, &g_device_list, g_dev_node) {
+ if (!se_dev->dev_attrib.emulate_3pc)
+ return 0;
- if (!se_dev->dev_attrib.emulate_3pc)
- continue;
+ memset(&tmp_dev_wwn[0], 0, XCOPY_NAA_IEEE_REGEX_LEN);
+ target_xcopy_gen_naa_ieee(se_dev, &tmp_dev_wwn[0]);
- memset(&tmp_dev_wwn[0], 0, XCOPY_NAA_IEEE_REGEX_LEN);
- target_xcopy_gen_naa_ieee(se_dev, &tmp_dev_wwn[0]);
+ rc = memcmp(&tmp_dev_wwn[0], info->dev_wwn, XCOPY_NAA_IEEE_REGEX_LEN);
+ if (rc != 0)
+ return 0;
- rc = memcmp(&tmp_dev_wwn[0], dev_wwn, XCOPY_NAA_IEEE_REGEX_LEN);
- if (rc != 0)
- continue;
+ info->found_dev = se_dev;
+ pr_debug("XCOPY 0xe4: located se_dev: %p\n", se_dev);
- *found_dev = se_dev;
- pr_debug("XCOPY 0xe4: located se_dev: %p\n", se_dev);
+ rc = target_depend_item(&se_dev->dev_group.cg_item);
+ if (rc != 0) {
+ pr_err("configfs_depend_item attempt failed: %d for se_dev: %p\n",
+ rc, se_dev);
+ return rc;
+ }
- rc = target_depend_item(&se_dev->dev_group.cg_item);
- if (rc != 0) {
- pr_err("configfs_depend_item attempt failed:"
- " %d for se_dev: %p\n", rc, se_dev);
- mutex_unlock(&g_device_mutex);
- return rc;
- }
+ pr_debug("Called configfs_depend_item for se_dev: %p se_dev->se_dev_group: %p\n",
+ se_dev, &se_dev->dev_group);
+ return 1;
+}
+
+static int target_xcopy_locate_se_dev_e4(const unsigned char *dev_wwn,
+ struct se_device **found_dev)
+{
+ struct xcopy_dev_search_info info;
+ int ret;
- pr_debug("Called configfs_depend_item for se_dev: %p"
- " se_dev->se_dev_group: %p\n", se_dev,
- &se_dev->dev_group);
+ memset(&info, 0, sizeof(info));
+ info.dev_wwn = dev_wwn;
- mutex_unlock(&g_device_mutex);
+ ret = target_for_each_device(target_xcopy_locate_se_dev_e4_iter, &info);
+ if (ret == 1) {
+ *found_dev = info.found_dev;
return 0;
+ } else {
+ pr_debug_ratelimited("Unable to locate 0xe4 descriptor for EXTENDED_COPY\n");
+ return -EINVAL;
}
- mutex_unlock(&g_device_mutex);
-
- pr_debug_ratelimited("Unable to locate 0xe4 descriptor for EXTENDED_COPY\n");
- return -EINVAL;
}
static int target_xcopy_parse_tiddesc_e4(struct se_cmd *se_cmd, struct xcopy_op *xop,