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| author | Sagi Grimberg | 2018-11-12 22:56:39 +0100 |
|---|---|---|
| committer | Jens Axboe | 2018-12-08 06:26:57 +0100 |
| commit | 253928eec61a52935584777f0dfba6cdb63967b6 (patch) | |
| tree | 4858d032ae648697e83ad399fdfba1ab83e6f880 /drivers/nvme/target/core.c | |
| parent | nvmet: add support to Discovery controllers for commands (diff) | |
| download | kernel-qcow2-linux-253928eec61a52935584777f0dfba6cdb63967b6.tar.gz kernel-qcow2-linux-253928eec61a52935584777f0dfba6cdb63967b6.tar.xz kernel-qcow2-linux-253928eec61a52935584777f0dfba6cdb63967b6.zip | |
nvmet: allow host connect even if no allowed subsystems are exported
It is perfectly valid that a host connects to a discovery subsystem
and gets an empty discovery log page since no subsystems are
provisioned to it. No reason to disallow connecting to the discovery
subsystem all together.
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Jay Sternberg <jay.e.sternberg@intel.com>
Reviewed-by: Phil Cayton <phil.cayton@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/nvme/target/core.c')
| -rw-r--r-- | drivers/nvme/target/core.c | 34 |
1 files changed, 7 insertions, 27 deletions
diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c index 46345c3f9d4a..849080b4115c 100644 --- a/drivers/nvme/target/core.c +++ b/drivers/nvme/target/core.c @@ -1032,14 +1032,18 @@ u16 nvmet_check_ctrl_status(struct nvmet_req *req, struct nvme_command *cmd) return 0; } -static bool __nvmet_host_allowed(struct nvmet_subsys *subsys, - const char *hostnqn) +bool nvmet_host_allowed(struct nvmet_subsys *subsys, const char *hostnqn) { struct nvmet_host_link *p; + lockdep_assert_held(&nvmet_config_sem); + if (subsys->allow_any_host) return true; + if (subsys->type == NVME_NQN_DISC) /* allow all access to disc subsys */ + return true; + list_for_each_entry(p, &subsys->hosts, entry) { if (!strcmp(nvmet_host_name(p->host), hostnqn)) return true; @@ -1048,30 +1052,6 @@ static bool __nvmet_host_allowed(struct nvmet_subsys *subsys, return false; } -static bool nvmet_host_discovery_allowed(struct nvmet_req *req, - const char *hostnqn) -{ - struct nvmet_subsys_link *s; - - list_for_each_entry(s, &req->port->subsystems, entry) { - if (__nvmet_host_allowed(s->subsys, hostnqn)) - return true; - } - - return false; -} - -bool nvmet_host_allowed(struct nvmet_req *req, struct nvmet_subsys *subsys, - const char *hostnqn) -{ - lockdep_assert_held(&nvmet_config_sem); - - if (subsys->type == NVME_NQN_DISC) - return nvmet_host_discovery_allowed(req, hostnqn); - else - return __nvmet_host_allowed(subsys, hostnqn); -} - /* * Note: ctrl->subsys->lock should be held when calling this function */ @@ -1122,7 +1102,7 @@ u16 nvmet_alloc_ctrl(const char *subsysnqn, const char *hostnqn, status = NVME_SC_CONNECT_INVALID_PARAM | NVME_SC_DNR; down_read(&nvmet_config_sem); - if (!nvmet_host_allowed(req, subsys, hostnqn)) { + if (!nvmet_host_allowed(subsys, hostnqn)) { pr_info("connect by host %s for subsystem %s not allowed\n", hostnqn, subsysnqn); req->rsp->result.u32 = IPO_IATTR_CONNECT_DATA(hostnqn); |