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| author | Sagi Grimberg <sagi@grimberg.me> | 2016-11-28 01:47:40 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2017-02-22 13:34:00 -0700 |
| commit | 8432bdb2905713cb3ef5cbe4a72630fa575565ad (patch) | |
| tree | a70caa934fa285b6077925fa510a3fa04299ed72 /drivers/nvme | |
| parent | 15fbad96fc5fb1c5a0502e6a10dea671f510de3d (diff) | |
| download | blackbird-op-linux-8432bdb2905713cb3ef5cbe4a72630fa575565ad.tar.gz blackbird-op-linux-8432bdb2905713cb3ef5cbe4a72630fa575565ad.zip | |
nvme: Make controller state visible via sysfs
Easier for debugging and testing state machine
transitions.
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/nvme')
| -rw-r--r-- | drivers/nvme/host/core.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 44a1a257e0b5..d52978038621 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -1577,6 +1577,29 @@ static ssize_t nvme_sysfs_show_transport(struct device *dev, } static DEVICE_ATTR(transport, S_IRUGO, nvme_sysfs_show_transport, NULL); +static ssize_t nvme_sysfs_show_state(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct nvme_ctrl *ctrl = dev_get_drvdata(dev); + static const char *const state_name[] = { + [NVME_CTRL_NEW] = "new", + [NVME_CTRL_LIVE] = "live", + [NVME_CTRL_RESETTING] = "resetting", + [NVME_CTRL_RECONNECTING]= "reconnecting", + [NVME_CTRL_DELETING] = "deleting", + [NVME_CTRL_DEAD] = "dead", + }; + + if ((unsigned)ctrl->state < ARRAY_SIZE(state_name) && + state_name[ctrl->state]) + return sprintf(buf, "%s\n", state_name[ctrl->state]); + + return sprintf(buf, "unknown state\n"); +} + +static DEVICE_ATTR(state, S_IRUGO, nvme_sysfs_show_state, NULL); + static ssize_t nvme_sysfs_show_subsysnqn(struct device *dev, struct device_attribute *attr, char *buf) @@ -1609,6 +1632,7 @@ static struct attribute *nvme_dev_attrs[] = { &dev_attr_transport.attr, &dev_attr_subsysnqn.attr, &dev_attr_address.attr, + &dev_attr_state.attr, NULL }; |
