From: Hannes Reinecke <hare@suse.de>
To: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>,
linux-nvme@lists.infradead.org, Sagi Grimberg <sagi@grimberg.me>,
Keith Busch <keith.busch@wdc.com>,
James Smart <james.smart@broadcom.com>
Subject: [PATCH 3/7] nvme-fcloop: use IDA for port ids
Date: Tue, 22 Sep 2020 14:14:57 +0200 [thread overview]
Message-ID: <20200922121501.32851-4-hare@suse.de> (raw)
In-Reply-To: <20200922121501.32851-1-hare@suse.de>
Use an IDA to register port IDs to avoid duplicate port IDs. It
also will generate a unique port ID if none is specified.
Signed-off-by: Hannes Reinecke <hare@suse.de>
---
drivers/nvme/target/fcloop.c | 51 +++++++++++++++++++++++++++++++++++++-------
1 file changed, 43 insertions(+), 8 deletions(-)
diff --git a/drivers/nvme/target/fcloop.c b/drivers/nvme/target/fcloop.c
index 082aa4dee406..e56f323fa7d4 100644
--- a/drivers/nvme/target/fcloop.c
+++ b/drivers/nvme/target/fcloop.c
@@ -12,6 +12,7 @@
#include <linux/nvme-fc-driver.h>
#include <linux/nvme-fc.h>
+#define FCLOOP_MAX_AL_PA 0xEF
enum {
NVMF_OPT_ERR = 0,
@@ -63,6 +64,9 @@ fcloop_parse_options(struct fcloop_ctrl_options *opts,
int token, ret = 0;
u64 token64;
+ /* Default setting */
+ opts->fcaddr = 1;
+
options = o = kstrdup(buf, GFP_KERNEL);
if (!options)
return -ENOMEM;
@@ -102,6 +106,10 @@ fcloop_parse_options(struct fcloop_ctrl_options *opts,
ret = -EINVAL;
goto out_free_options;
}
+ if (!token || token > FCLOOP_MAX_AL_PA) {
+ ret = -EINVAL;
+ goto out_free_options;
+ }
opts->fcaddr = token;
break;
case NVMF_OPT_LPWWNN:
@@ -203,11 +211,13 @@ fcloop_parse_nm_options(struct device *dev, u64 *nname, u64 *pname,
static DEFINE_SPINLOCK(fcloop_lock);
static LIST_HEAD(fcloop_lports);
static LIST_HEAD(fcloop_nports);
+static DEFINE_IDA(fcloop_portid_ida);
struct fcloop_lport {
struct nvme_fc_local_port *localport;
struct list_head lport_list;
struct completion unreg_done;
+ u32 port_id;
};
struct fcloop_lport_priv {
@@ -949,6 +959,8 @@ fcloop_nport_free(struct kref *ref)
list_del(&nport->nport_list);
spin_unlock_irqrestore(&fcloop_lock, flags);
+ ida_free(&fcloop_portid_ida, nport->port_id);
+
kfree(nport);
}
@@ -1047,7 +1059,7 @@ fcloop_create_local_port(struct device *dev, struct device_attribute *attr,
struct fcloop_lport *lport;
struct fcloop_lport_priv *lport_priv;
unsigned long flags;
- int ret = -ENOMEM;
+ int ret = -ENOMEM, port_id;
lport = kzalloc(sizeof(*lport), GFP_KERNEL);
if (!lport)
@@ -1067,11 +1079,22 @@ fcloop_create_local_port(struct device *dev, struct device_attribute *attr,
goto out_free_opts;
}
+ port_id = ida_alloc_range(&fcloop_portid_ida,
+ opts->fcaddr, FCLOOP_MAX_AL_PA, GFP_KERNEL);
+ if (port_id < 0) {
+ ret = port_id;
+ goto out_free_opts;
+ }
+ if ((opts->mask & NVMF_OPT_FCADDR) && opts->fcaddr != port_id) {
+ ret = -EINVAL;
+ goto out_free_ida;
+ }
+
memset(&pinfo, 0, sizeof(pinfo));
pinfo.node_name = opts->wwnn;
pinfo.port_name = opts->wwpn;
pinfo.port_role = opts->roles;
- pinfo.port_id = opts->fcaddr;
+ pinfo.port_id = port_id;
ret = nvme_fc_register_localport(&pinfo, &fctemplate, NULL, &localport);
if (!ret) {
@@ -1086,7 +1109,9 @@ fcloop_create_local_port(struct device *dev, struct device_attribute *attr,
list_add_tail(&lport->lport_list, &fcloop_lports);
spin_unlock_irqrestore(&fcloop_lock, flags);
}
-
+out_free_ida:
+ if (ret)
+ ida_free(&fcloop_portid_ida, port_id);
out_free_opts:
kfree(opts);
out_free_lport:
@@ -1115,6 +1140,8 @@ __wait_localport_unreg(struct fcloop_lport *lport)
wait_for_completion(&lport->unreg_done);
+ ida_free(&fcloop_portid_ida, lport->port_id);
+
kfree(lport);
return ret;
@@ -1162,7 +1189,7 @@ fcloop_alloc_nport(const char *buf, size_t count, bool remoteport)
struct fcloop_ctrl_options *opts;
unsigned long flags;
u32 opts_mask = (remoteport) ? RPORT_OPTS : TGTPORT_OPTS;
- int ret;
+ int ret, port_id;
opts = kzalloc(sizeof(*opts), GFP_KERNEL);
if (!opts)
@@ -1182,13 +1209,21 @@ fcloop_alloc_nport(const char *buf, size_t count, bool remoteport)
if (!newnport)
goto out_free_opts;
+ port_id = ida_alloc_range(&fcloop_portid_ida,
+ opts->fcaddr, FCLOOP_MAX_AL_PA, GFP_KERNEL);
+ if (port_id < 0)
+ goto out_free_newnport;
+
+ if ((opts->mask & NVMF_OPT_FCADDR) && opts->fcaddr != port_id)
+ goto out_free_ida;
+
INIT_LIST_HEAD(&newnport->nport_list);
newnport->node_name = opts->wwnn;
newnport->port_name = opts->wwpn;
+ newnport->port_id = port_id;
if (opts->mask & NVMF_OPT_ROLES)
newnport->port_role = opts->roles;
- if (opts->mask & NVMF_OPT_FCADDR)
- newnport->port_id = opts->fcaddr;
+
kref_init(&newnport->ref);
spin_lock_irqsave(&fcloop_lock, flags);
@@ -1226,8 +1261,6 @@ fcloop_alloc_nport(const char *buf, size_t count, bool remoteport)
nport->lport = lport;
if (opts->mask & NVMF_OPT_ROLES)
nport->port_role = opts->roles;
- if (opts->mask & NVMF_OPT_FCADDR)
- nport->port_id = opts->fcaddr;
goto out_free_newnport;
}
}
@@ -1241,6 +1274,8 @@ fcloop_alloc_nport(const char *buf, size_t count, bool remoteport)
out_invalid_opts:
spin_unlock_irqrestore(&fcloop_lock, flags);
+out_free_ida:
+ ida_free(&fcloop_portid_ida, port_id);
out_free_newnport:
kfree(newnport);
out_free_opts:
--
2.16.4
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next prev parent reply other threads:[~2020-09-22 12:15 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-22 12:14 [PATCH 0/7] nvme-fcloop: fix shutdown and improve logging Hannes Reinecke
2020-09-22 12:14 ` [PATCH 1/7] nvme-fcloop: flush workqueue before calling nvme_fc_unregister_remoteport() Hannes Reinecke
2020-10-05 17:14 ` James Smart
2020-09-22 12:14 ` [PATCH 2/7] nvmet-fc: use per-target workqueue when removing associations Hannes Reinecke
2020-10-05 17:18 ` James Smart
2020-09-22 12:14 ` Hannes Reinecke [this message]
2020-10-05 17:33 ` [PATCH 3/7] nvme-fcloop: use IDA for port ids James Smart
2020-10-09 13:57 ` Hannes Reinecke
2020-09-22 12:14 ` [PATCH 4/7] nvmet-fc: use feature flag for virtual LLDD Hannes Reinecke
2020-10-05 17:37 ` James Smart
2020-09-22 12:14 ` [PATCH 5/7] nvme-fc: " Hannes Reinecke
2020-10-05 17:38 ` James Smart
2020-09-22 12:15 ` [PATCH 6/7] nvme-fcloop: use a device for nport Hannes Reinecke
2020-10-05 17:41 ` James Smart
2020-09-22 12:15 ` [PATCH 7/7] nvme-fcloop: use a device for lport Hannes Reinecke
2020-10-05 17:45 ` James Smart
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