diff options
author | Mike Christie <mchristi@redhat.com> | 2017-06-23 01:18:17 -0500 |
---|---|---|
committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2017-07-06 23:11:40 -0700 |
commit | 6906d008b4b06e42cad393ac25bec76fbf31fabd (patch) | |
tree | 9f53be37fb763fd62de9151c44e1462c2599ac9b | |
parent | b1943fd454d1a2e2c8018a2f79a7023893619439 (diff) |
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>
-rw-r--r-- | drivers/target/target_core_xcopy.c | 70 |
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, |