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nvme: use sysfs_emit instead of sprintf 

sysfs_emit is the recommended API to use for formatting strings to be
returned to user space. It is equivalent to scnprintf and aware of the
PAGE_SIZE buffer size.

Suggested-by: Chaitanya Kulkarni <Chaitanya.Kulkarni@wdc.com>
Signed-off-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Daniel Wagner 2021-04-01 11:54:10 +02:00 committed by Christoph Hellwig
parent 8df1bff57c
commit bff4bcf3cf
2 changed files with 24 additions and 24 deletions
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40
drivers/nvme/host/core.c
View File

@ -2876,8 +2876,8 @@ static ssize_t subsys_##field##_show(struct device *dev, \
{ \
struct nvme_subsystem *subsys = \
container_of(dev, struct nvme_subsystem, dev); \
return sprintf(buf, "%.*s\n", \
(int)sizeof(subsys->field), subsys->field); \
return sysfs_emit(buf, "%.*s\n", \
(int)sizeof(subsys->field), subsys->field); \
} \
static SUBSYS_ATTR_RO(field, S_IRUGO, subsys_##field##_show);
@ -3407,13 +3407,13 @@ static ssize_t wwid_show(struct device *dev, struct device_attribute *attr,
int model_len = sizeof(subsys->model);
if (!uuid_is_null(&ids->uuid))
return sprintf(buf, "uuid.%pU\n", &ids->uuid);
return sysfs_emit(buf, "uuid.%pU\n", &ids->uuid);
if (memchr_inv(ids->nguid, 0, sizeof(ids->nguid)))
return sprintf(buf, "eui.%16phN\n", ids->nguid);
return sysfs_emit(buf, "eui.%16phN\n", ids->nguid);
if (memchr_inv(ids->eui64, 0, sizeof(ids->eui64)))
return sprintf(buf, "eui.%8phN\n", ids->eui64);
return sysfs_emit(buf, "eui.%8phN\n", ids->eui64);
while (serial_len > 0 && (subsys->serial[serial_len - 1] == ' ' ||
subsys->serial[serial_len - 1] == '\0'))
@ -3422,7 +3422,7 @@ static ssize_t wwid_show(struct device *dev, struct device_attribute *attr,
subsys->model[model_len - 1] == '\0'))
model_len--;
return sprintf(buf, "nvme.%04x-%*phN-%*phN-%08x\n", subsys->vendor_id,
return sysfs_emit(buf, "nvme.%04x-%*phN-%*phN-%08x\n", subsys->vendor_id,
serial_len, subsys->serial, model_len, subsys->model,
head->ns_id);
}
@ -3431,7 +3431,7 @@ static DEVICE_ATTR_RO(wwid);
static ssize_t nguid_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
return sprintf(buf, "%pU\n", dev_to_ns_head(dev)->ids.nguid);
return sysfs_emit(buf, "%pU\n", dev_to_ns_head(dev)->ids.nguid);
}
static DEVICE_ATTR_RO(nguid);
@ -3446,23 +3446,23 @@ static ssize_t uuid_show(struct device *dev, struct device_attribute *attr,
if (uuid_is_null(&ids->uuid)) {
printk_ratelimited(KERN_WARNING
"No UUID available providing old NGUID\n");
return sprintf(buf, "%pU\n", ids->nguid);
return sysfs_emit(buf, "%pU\n", ids->nguid);
}
return sprintf(buf, "%pU\n", &ids->uuid);
return sysfs_emit(buf, "%pU\n", &ids->uuid);
}
static DEVICE_ATTR_RO(uuid);
static ssize_t eui_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
return sprintf(buf, "%8ph\n", dev_to_ns_head(dev)->ids.eui64);
return sysfs_emit(buf, "%8ph\n", dev_to_ns_head(dev)->ids.eui64);
}
static DEVICE_ATTR_RO(eui);
static ssize_t nsid_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
return sprintf(buf, "%d\n", dev_to_ns_head(dev)->ns_id);
return sysfs_emit(buf, "%d\n", dev_to_ns_head(dev)->ns_id);
}
static DEVICE_ATTR_RO(nsid);
@ -3527,7 +3527,7 @@ static ssize_t field##_show(struct device *dev, \
struct device_attribute *attr, char *buf) \
{ \
struct nvme_ctrl *ctrl = dev_get_drvdata(dev); \
return sprintf(buf, "%.*s\n", \
return sysfs_emit(buf, "%.*s\n", \
(int)sizeof(ctrl->subsys->field), ctrl->subsys->field); \
} \
static DEVICE_ATTR(field, S_IRUGO, field##_show, NULL);
@ -3541,7 +3541,7 @@ static ssize_t field##_show(struct device *dev, \
struct device_attribute *attr, char *buf) \
{ \
struct nvme_ctrl *ctrl = dev_get_drvdata(dev); \
return sprintf(buf, "%d\n", ctrl->field); \
return sysfs_emit(buf, "%d\n", ctrl->field); \
} \
static DEVICE_ATTR(field, S_IRUGO, field##_show, NULL);
@ -3589,9 +3589,9 @@ static ssize_t nvme_sysfs_show_state(struct device *dev,
if ((unsigned)ctrl->state < ARRAY_SIZE(state_name) &&
state_name[ctrl->state])
return sprintf(buf, "%s\n", state_name[ctrl->state]);
return sysfs_emit(buf, "%s\n", state_name[ctrl->state]);
return sprintf(buf, "unknown state\n");
return sysfs_emit(buf, "unknown state\n");
}
static DEVICE_ATTR(state, S_IRUGO, nvme_sysfs_show_state, NULL);
@ -3643,9 +3643,9 @@ static ssize_t nvme_ctrl_loss_tmo_show(struct device *dev,
struct nvmf_ctrl_options *opts = ctrl->opts;
if (ctrl->opts->max_reconnects == -1)
return sprintf(buf, "off\n");
return sprintf(buf, "%d\n",
opts->max_reconnects * opts->reconnect_delay);
return sysfs_emit(buf, "off\n");
return sysfs_emit(buf, "%d\n",
opts->max_reconnects * opts->reconnect_delay);
}
static ssize_t nvme_ctrl_loss_tmo_store(struct device *dev,
@ -3675,8 +3675,8 @@ static ssize_t nvme_ctrl_reconnect_delay_show(struct device *dev,
struct nvme_ctrl *ctrl = dev_get_drvdata(dev);
if (ctrl->opts->reconnect_delay == -1)
return sprintf(buf, "off\n");
return sprintf(buf, "%d\n", ctrl->opts->reconnect_delay);
return sysfs_emit(buf, "off\n");
return sysfs_emit(buf, "%d\n", ctrl->opts->reconnect_delay);
}
static ssize_t nvme_ctrl_reconnect_delay_store(struct device *dev,

8
drivers/nvme/host/multipath.c
View File

@ -602,8 +602,8 @@ static ssize_t nvme_subsys_iopolicy_show(struct device *dev,
struct nvme_subsystem *subsys =
container_of(dev, struct nvme_subsystem, dev);
return sprintf(buf, "%s\n",
nvme_iopolicy_names[READ_ONCE(subsys->iopolicy)]);
return sysfs_emit(buf, "%s\n",
nvme_iopolicy_names[READ_ONCE(subsys->iopolicy)]);
}
static ssize_t nvme_subsys_iopolicy_store(struct device *dev,
@ -628,7 +628,7 @@ SUBSYS_ATTR_RW(iopolicy, S_IRUGO | S_IWUSR,
static ssize_t ana_grpid_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
return sprintf(buf, "%d\n", nvme_get_ns_from_dev(dev)->ana_grpid);
return sysfs_emit(buf, "%d\n", nvme_get_ns_from_dev(dev)->ana_grpid);
}
DEVICE_ATTR_RO(ana_grpid);
@ -637,7 +637,7 @@ static ssize_t ana_state_show(struct device *dev, struct device_attribute *attr,
{
struct nvme_ns *ns = nvme_get_ns_from_dev(dev);
return sprintf(buf, "%s\n", nvme_ana_state_names[ns->ana_state]);
return sysfs_emit(buf, "%s\n", nvme_ana_state_names[ns->ana_state]);
}
DEVICE_ATTR_RO(ana_state);