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author | Nicholas Bellinger <nab@linux-iscsi.org> | 2016-05-14 21:44:01 -0700 |
---|---|---|
committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2016-05-16 22:14:29 -0700 |
commit | d4b3fa4b0881b600ddeee9dd47b27dea9709f322 (patch) | |
tree | 1e44c18d5df566fed74e936c6bd86034449affce /drivers/target/iscsi/iscsi_target_configfs.c | |
parent | 54a5e73f4d6e31d5628e08b4d575c71d71670e09 (diff) | |
download | linux-d4b3fa4b0881b600ddeee9dd47b27dea9709f322.tar.bz2 |
iscsi-target: Make iscsi_tpg_np driver show/store use generic code
Go ahead and fold the duplicate iscsi_tpg_np driver attribute
show/store functions into generic callers, invoked by current
driver specific functions.
This allows for future v4.8+ changes to have iscsi_target_mod
use tpg_np driver attributes at runtime, instead of having
the defaults hardcoded in iscsi_target_configfs.c.
Also, drop the unused/legacy 'sctp' attribute for non standard
RFC-3720 operation with IPPROTO_SCTP.
Cc: Varun Prakash <varun@chelsio.com>
Cc: Hariprasad Shenai <hariprasad@chelsio.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target/iscsi/iscsi_target_configfs.c')
-rw-r--r-- | drivers/target/iscsi/iscsi_target_configfs.c | 199 |
1 files changed, 41 insertions, 158 deletions
diff --git a/drivers/target/iscsi/iscsi_target_configfs.c b/drivers/target/iscsi/iscsi_target_configfs.c index 1b8f885dbfeb..33d811ac9539 100644 --- a/drivers/target/iscsi/iscsi_target_configfs.c +++ b/drivers/target/iscsi/iscsi_target_configfs.c @@ -43,14 +43,15 @@ static inline struct iscsi_tpg_np *to_iscsi_tpg_np(struct config_item *item) return container_of(to_tpg_np(item), struct iscsi_tpg_np, se_tpg_np); } -static ssize_t lio_target_np_sctp_show(struct config_item *item, char *page) +static ssize_t lio_target_np_driver_show(struct config_item *item, char *page, + enum iscsit_transport_type type) { struct iscsi_tpg_np *tpg_np = to_iscsi_tpg_np(item); - struct iscsi_tpg_np *tpg_np_sctp; + struct iscsi_tpg_np *tpg_np_new; ssize_t rb; - tpg_np_sctp = iscsit_tpg_locate_child_np(tpg_np, ISCSI_SCTP_TCP); - if (tpg_np_sctp) + tpg_np_new = iscsit_tpg_locate_child_np(tpg_np, type); + if (tpg_np_new) rb = sprintf(page, "1\n"); else rb = sprintf(page, "0\n"); @@ -58,86 +59,20 @@ static ssize_t lio_target_np_sctp_show(struct config_item *item, char *page) return rb; } -static ssize_t lio_target_np_sctp_store(struct config_item *item, - const char *page, size_t count) +static ssize_t lio_target_np_driver_store(struct config_item *item, + const char *page, size_t count, enum iscsit_transport_type type, + const char *mod_name) { struct iscsi_tpg_np *tpg_np = to_iscsi_tpg_np(item); struct iscsi_np *np; struct iscsi_portal_group *tpg; - struct iscsi_tpg_np *tpg_np_sctp = NULL; + struct iscsi_tpg_np *tpg_np_new = NULL; u32 op; - int ret; - - ret = kstrtou32(page, 0, &op); - if (ret) - return ret; - if ((op != 1) && (op != 0)) { - pr_err("Illegal value for tpg_enable: %u\n", op); - return -EINVAL; - } - np = tpg_np->tpg_np; - if (!np) { - pr_err("Unable to locate struct iscsi_np from" - " struct iscsi_tpg_np\n"); - return -EINVAL; - } - - tpg = tpg_np->tpg; - if (iscsit_get_tpg(tpg) < 0) - return -EINVAL; + int rc; - if (op) { - /* - * Use existing np->np_sockaddr for SCTP network portal reference - */ - tpg_np_sctp = iscsit_tpg_add_network_portal(tpg, &np->np_sockaddr, - tpg_np, ISCSI_SCTP_TCP); - if (!tpg_np_sctp || IS_ERR(tpg_np_sctp)) - goto out; - } else { - tpg_np_sctp = iscsit_tpg_locate_child_np(tpg_np, ISCSI_SCTP_TCP); - if (!tpg_np_sctp) - goto out; - - ret = iscsit_tpg_del_network_portal(tpg, tpg_np_sctp); - if (ret < 0) - goto out; - } - - iscsit_put_tpg(tpg); - return count; -out: - iscsit_put_tpg(tpg); - return -EINVAL; -} - -static ssize_t lio_target_np_iser_show(struct config_item *item, char *page) -{ - struct iscsi_tpg_np *tpg_np = to_iscsi_tpg_np(item); - struct iscsi_tpg_np *tpg_np_iser; - ssize_t rb; - - tpg_np_iser = iscsit_tpg_locate_child_np(tpg_np, ISCSI_INFINIBAND); - if (tpg_np_iser) - rb = sprintf(page, "1\n"); - else - rb = sprintf(page, "0\n"); - - return rb; -} - -static ssize_t lio_target_np_iser_store(struct config_item *item, - const char *page, size_t count) -{ - struct iscsi_tpg_np *tpg_np = to_iscsi_tpg_np(item); - struct iscsi_np *np; - struct iscsi_portal_group *tpg; - struct iscsi_tpg_np *tpg_np_iser = NULL; - char *endptr; - u32 op; - int rc = 0; - - op = simple_strtoul(page, &endptr, 0); + rc = kstrtou32(page, 0, &op); + if (rc) + return rc; if ((op != 1) && (op != 0)) { pr_err("Illegal value for tpg_enable: %u\n", op); return -EINVAL; @@ -154,22 +89,23 @@ static ssize_t lio_target_np_iser_store(struct config_item *item, return -EINVAL; if (op) { - rc = request_module("ib_isert"); - if (rc != 0) { - pr_warn("Unable to request_module for ib_isert\n"); - rc = 0; + if (strlen(mod_name)) { + rc = request_module(mod_name); + if (rc != 0) { + pr_warn("Unable to request_module for %s\n", + mod_name); + rc = 0; + } } - tpg_np_iser = iscsit_tpg_add_network_portal(tpg, &np->np_sockaddr, - tpg_np, ISCSI_INFINIBAND); - if (IS_ERR(tpg_np_iser)) { - rc = PTR_ERR(tpg_np_iser); + tpg_np_new = iscsit_tpg_add_network_portal(tpg, + &np->np_sockaddr, tpg_np, type); + if (IS_ERR(tpg_np_new)) goto out; - } } else { - tpg_np_iser = iscsit_tpg_locate_child_np(tpg_np, ISCSI_INFINIBAND); - if (tpg_np_iser) { - rc = iscsit_tpg_del_network_portal(tpg, tpg_np_iser); + tpg_np_new = iscsit_tpg_locate_child_np(tpg_np, type); + if (tpg_np_new) { + rc = iscsit_tpg_del_network_portal(tpg, tpg_np_new); if (rc < 0) goto out; } @@ -182,86 +118,33 @@ out: return rc; } -static ssize_t lio_target_np_hw_offload_show(struct config_item *item, - char *page) +static ssize_t lio_target_np_iser_show(struct config_item *item, char *page) { - struct iscsi_tpg_np *tpg_np = to_iscsi_tpg_np(item); - struct iscsi_tpg_np *tpg_np_hw_offload; - ssize_t rb; + return lio_target_np_driver_show(item, page, ISCSI_INFINIBAND); +} - tpg_np_hw_offload = iscsit_tpg_locate_child_np(tpg_np, - ISCSI_HW_OFFLOAD); - if (tpg_np_hw_offload) - rb = sprintf(page, "1\n"); - else - rb = sprintf(page, "0\n"); +static ssize_t lio_target_np_iser_store(struct config_item *item, + const char *page, size_t count) +{ + return lio_target_np_driver_store(item, page, count, + ISCSI_INFINIBAND, "ib_isert"); +} +CONFIGFS_ATTR(lio_target_np_, iser); - return rb; +static ssize_t lio_target_np_hw_offload_show(struct config_item *item, char *page) +{ + return lio_target_np_driver_show(item, page, ISCSI_HW_OFFLOAD); } static ssize_t lio_target_np_hw_offload_store(struct config_item *item, const char *page, size_t count) { - struct iscsi_tpg_np *tpg_np = to_iscsi_tpg_np(item); - struct iscsi_np *np; - struct iscsi_portal_group *tpg; - struct iscsi_tpg_np *tpg_np_hw_offload = NULL; - u32 op; - int rc = 0; - - rc = kstrtou32(page, 0, &op); - if (rc) - return rc; - - if ((op != 1) && (op != 0)) { - pr_err("Illegal value for tpg_enable: %u\n", op); - return -EINVAL; - } - - np = tpg_np->tpg_np; - if (!np) { - pr_err("Unable to locate struct iscsi_np from" - " struct iscsi_tpg_np\n"); - return -EINVAL; - } - - tpg = tpg_np->tpg; - if (iscsit_get_tpg(tpg) < 0) - return -EINVAL; - - if (op) { - tpg_np_hw_offload = iscsit_tpg_add_network_portal(tpg, - &np->np_sockaddr, tpg_np, ISCSI_HW_OFFLOAD); - - if (IS_ERR(tpg_np_hw_offload)) { - rc = PTR_ERR(tpg_np_hw_offload); - goto out; - } - } else { - tpg_np_hw_offload = iscsit_tpg_locate_child_np(tpg_np, - ISCSI_HW_OFFLOAD); - - if (tpg_np_hw_offload) { - rc = iscsit_tpg_del_network_portal(tpg, - tpg_np_hw_offload); - if (rc < 0) - goto out; - } - } - - iscsit_put_tpg(tpg); - return count; -out: - iscsit_put_tpg(tpg); - return rc; + return lio_target_np_driver_store(item, page, count, + ISCSI_HW_OFFLOAD, ""); } - -CONFIGFS_ATTR(lio_target_np_, sctp); -CONFIGFS_ATTR(lio_target_np_, iser); CONFIGFS_ATTR(lio_target_np_, hw_offload); static struct configfs_attribute *lio_target_portal_attrs[] = { - &lio_target_np_attr_sctp, &lio_target_np_attr_iser, &lio_target_np_attr_hw_offload, NULL, |