[PATCH v2 16/25] scsi: myrb,myrs: Convert sprintf() family to sysfs_emit() family

From: Li Zhijian
Date: Tue Mar 19 2024 - 02:34:36 EST

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Per filesystems/sysfs.rst, show() should only use sysfs_emit()
or sysfs_emit_at() when formatting the value to be returned to user space.

coccinelle complains that there are still a couple of functions that use
snprintf(). Convert them to sysfs_emit().

sprintf() and scnprintf() will be converted as well if they have.

Generally, this patch is generated by
make coccicheck M=<path/to/file> MODE=patch \
COCCI=scripts/coccinelle/api/device_attr_show.cocci

No functional change intended

CC: Hannes Reinecke <hare@xxxxxxxxxx>
CC: "James E.J. Bottomley" <jejb@xxxxxxxxxxxxx>
CC: "Martin K. Petersen" <martin.petersen@xxxxxxxxxx>
CC: linux-scsi@xxxxxxxxxxxxxxx
Signed-off-by: Li Zhijian <lizhijian@xxxxxxxxxxx>
---
This is a part of the work "Fix coccicheck device_attr_show warnings"[1]
Split them per subsystem so that the maintainer can review it easily
[1] https://lore.kernel.org/lkml/20240116041129.3937800-1-lizhijian@xxxxxxxxxxx/
---
drivers/scsi/myrb.c | 38 ++++++++++----------
drivers/scsi/myrs.c | 88 ++++++++++++++++++++++-----------------------
2 files changed, 63 insertions(+), 63 deletions(-)

diff --git a/drivers/scsi/myrb.c b/drivers/scsi/myrb.c
index ca2e932dd9b7..06a5e6fb9f99 100644
--- a/drivers/scsi/myrb.c
+++ b/drivers/scsi/myrb.c
@@ -1767,7 +1767,7 @@ static ssize_t raid_state_show(struct device *dev,
int ret;

if (!sdev->hostdata)
- return snprintf(buf, 16, "Unknown\n");
+ return sysfs_emit(buf, "Unknown\n");

if (sdev->channel == myrb_logical_channel(sdev->host)) {
struct myrb_ldev_info *ldev_info = sdev->hostdata;
@@ -1775,10 +1775,10 @@ static ssize_t raid_state_show(struct device *dev,

name = myrb_devstate_name(ldev_info->state);
if (name)
- ret = snprintf(buf, 32, "%s\n", name);
+ ret = sysfs_emit(buf, "%s\n", name);
else
- ret = snprintf(buf, 32, "Invalid (%02X)\n",
- ldev_info->state);
+ ret = sysfs_emit(buf, "Invalid (%02X)\n",
+ ldev_info->state);
} else {
struct myrb_pdev_state *pdev_info = sdev->hostdata;
unsigned short status;
@@ -1796,10 +1796,10 @@ static ssize_t raid_state_show(struct device *dev,
else
name = myrb_devstate_name(pdev_info->state);
if (name)
- ret = snprintf(buf, 32, "%s\n", name);
+ ret = sysfs_emit(buf, "%s\n", name);
else
- ret = snprintf(buf, 32, "Invalid (%02X)\n",
- pdev_info->state);
+ ret = sysfs_emit(buf, "Invalid (%02X)\n",
+ pdev_info->state);
}
return ret;
}
@@ -1886,11 +1886,11 @@ static ssize_t raid_level_show(struct device *dev,

name = myrb_raidlevel_name(ldev_info->raid_level);
if (!name)
- return snprintf(buf, 32, "Invalid (%02X)\n",
- ldev_info->state);
- return snprintf(buf, 32, "%s\n", name);
+ return sysfs_emit(buf, "Invalid (%02X)\n",
+ ldev_info->state);
+ return sysfs_emit(buf, "%s\n", name);
}
- return snprintf(buf, 32, "Physical Drive\n");
+ return sysfs_emit(buf, "Physical Drive\n");
}
static DEVICE_ATTR_RO(raid_level);

@@ -1903,17 +1903,17 @@ static ssize_t rebuild_show(struct device *dev,
unsigned char status;

if (sdev->channel < myrb_logical_channel(sdev->host))
- return snprintf(buf, 32, "physical device - not rebuilding\n");
+ return sysfs_emit(buf, "physical device - not rebuilding\n");

status = myrb_get_rbld_progress(cb, &rbld_buf);

if (rbld_buf.ldev_num != sdev->id ||
status != MYRB_STATUS_SUCCESS)
- return snprintf(buf, 32, "not rebuilding\n");
+ return sysfs_emit(buf, "not rebuilding\n");

- return snprintf(buf, 32, "rebuilding block %u of %u\n",
- rbld_buf.ldev_size - rbld_buf.blocks_left,
- rbld_buf.ldev_size);
+ return sysfs_emit(buf, "rebuilding block %u of %u\n",
+ rbld_buf.ldev_size - rbld_buf.blocks_left,
+ rbld_buf.ldev_size);
}

static ssize_t rebuild_store(struct device *dev,
@@ -2140,7 +2140,7 @@ static ssize_t ctlr_num_show(struct device *dev,
struct Scsi_Host *shost = class_to_shost(dev);
struct myrb_hba *cb = shost_priv(shost);

- return snprintf(buf, 20, "%u\n", cb->ctlr_num);
+ return sysfs_emit(buf, "%u\n", cb->ctlr_num);
}
static DEVICE_ATTR_RO(ctlr_num);

@@ -2150,7 +2150,7 @@ static ssize_t firmware_show(struct device *dev,
struct Scsi_Host *shost = class_to_shost(dev);
struct myrb_hba *cb = shost_priv(shost);

- return snprintf(buf, 16, "%s\n", cb->fw_version);
+ return sysfs_emit(buf, "%s\n", cb->fw_version);
}
static DEVICE_ATTR_RO(firmware);

@@ -2160,7 +2160,7 @@ static ssize_t model_show(struct device *dev,
struct Scsi_Host *shost = class_to_shost(dev);
struct myrb_hba *cb = shost_priv(shost);

- return snprintf(buf, 16, "%s\n", cb->model_name);
+ return sysfs_emit(buf, "%s\n", cb->model_name);
}
static DEVICE_ATTR_RO(model);

diff --git a/drivers/scsi/myrs.c b/drivers/scsi/myrs.c
index a1eec65a9713..5dda3b669ec1 100644
--- a/drivers/scsi/myrs.c
+++ b/drivers/scsi/myrs.c
@@ -939,7 +939,7 @@ static ssize_t raid_state_show(struct device *dev,
int ret;

if (!sdev->hostdata)
- return snprintf(buf, 16, "Unknown\n");
+ return sysfs_emit(buf, "Unknown\n");

if (sdev->channel >= cs->ctlr_info->physchan_present) {
struct myrs_ldev_info *ldev_info = sdev->hostdata;
@@ -947,10 +947,10 @@ static ssize_t raid_state_show(struct device *dev,

name = myrs_devstate_name(ldev_info->dev_state);
if (name)
- ret = snprintf(buf, 32, "%s\n", name);
+ ret = sysfs_emit(buf, "%s\n", name);
else
- ret = snprintf(buf, 32, "Invalid (%02X)\n",
- ldev_info->dev_state);
+ ret = sysfs_emit(buf, "Invalid (%02X)\n",
+ ldev_info->dev_state);
} else {
struct myrs_pdev_info *pdev_info;
const char *name;
@@ -958,10 +958,10 @@ static ssize_t raid_state_show(struct device *dev,
pdev_info = sdev->hostdata;
name = myrs_devstate_name(pdev_info->dev_state);
if (name)
- ret = snprintf(buf, 32, "%s\n", name);
+ ret = sysfs_emit(buf, "%s\n", name);
else
- ret = snprintf(buf, 32, "Invalid (%02X)\n",
- pdev_info->dev_state);
+ ret = sysfs_emit(buf, "Invalid (%02X)\n",
+ pdev_info->dev_state);
}
return ret;
}
@@ -1058,7 +1058,7 @@ static ssize_t raid_level_show(struct device *dev,
const char *name = NULL;

if (!sdev->hostdata)
- return snprintf(buf, 16, "Unknown\n");
+ return sysfs_emit(buf, "Unknown\n");

if (sdev->channel >= cs->ctlr_info->physchan_present) {
struct myrs_ldev_info *ldev_info;
@@ -1066,13 +1066,13 @@ static ssize_t raid_level_show(struct device *dev,
ldev_info = sdev->hostdata;
name = myrs_raid_level_name(ldev_info->raid_level);
if (!name)
- return snprintf(buf, 32, "Invalid (%02X)\n",
- ldev_info->dev_state);
+ return sysfs_emit(buf, "Invalid (%02X)\n",
+ ldev_info->dev_state);

} else
name = myrs_raid_level_name(MYRS_RAID_PHYSICAL);

- return snprintf(buf, 32, "%s\n", name);
+ return sysfs_emit(buf, "%s\n", name);
}
static DEVICE_ATTR_RO(raid_level);

@@ -1086,7 +1086,7 @@ static ssize_t rebuild_show(struct device *dev,
unsigned char status;

if (sdev->channel < cs->ctlr_info->physchan_present)
- return snprintf(buf, 32, "physical device - not rebuilding\n");
+ return sysfs_emit(buf, "physical device - not rebuilding\n");

ldev_info = sdev->hostdata;
ldev_num = ldev_info->ldev_num;
@@ -1098,11 +1098,11 @@ static ssize_t rebuild_show(struct device *dev,
return -EIO;
}
if (ldev_info->rbld_active) {
- return snprintf(buf, 32, "rebuilding block %zu of %zu\n",
- (size_t)ldev_info->rbld_lba,
- (size_t)ldev_info->cfg_devsize);
+ return sysfs_emit(buf, "rebuilding block %zu of %zu\n",
+ (size_t)ldev_info->rbld_lba,
+ (size_t)ldev_info->cfg_devsize);
} else
- return snprintf(buf, 32, "not rebuilding\n");
+ return sysfs_emit(buf, "not rebuilding\n");
}

static ssize_t rebuild_store(struct device *dev,
@@ -1190,7 +1190,7 @@ static ssize_t consistency_check_show(struct device *dev,
unsigned short ldev_num;

if (sdev->channel < cs->ctlr_info->physchan_present)
- return snprintf(buf, 32, "physical device - not checking\n");
+ return sysfs_emit(buf, "physical device - not checking\n");

ldev_info = sdev->hostdata;
if (!ldev_info)
@@ -1198,11 +1198,11 @@ static ssize_t consistency_check_show(struct device *dev,
ldev_num = ldev_info->ldev_num;
myrs_get_ldev_info(cs, ldev_num, ldev_info);
if (ldev_info->cc_active)
- return snprintf(buf, 32, "checking block %zu of %zu\n",
- (size_t)ldev_info->cc_lba,
- (size_t)ldev_info->cfg_devsize);
+ return sysfs_emit(buf, "checking block %zu of %zu\n",
+ (size_t)ldev_info->cc_lba,
+ (size_t)ldev_info->cfg_devsize);
else
- return snprintf(buf, 32, "not checking\n");
+ return sysfs_emit(buf, "not checking\n");
}

static ssize_t consistency_check_store(struct device *dev,
@@ -1303,7 +1303,7 @@ static ssize_t serial_show(struct device *dev,

memcpy(serial, cs->ctlr_info->serial_number, 16);
serial[16] = '\0';
- return snprintf(buf, 16, "%s\n", serial);
+ return sysfs_emit(buf, "%s\n", serial);
}
static DEVICE_ATTR_RO(serial);

@@ -1313,7 +1313,7 @@ static ssize_t ctlr_num_show(struct device *dev,
struct Scsi_Host *shost = class_to_shost(dev);
struct myrs_hba *cs = shost_priv(shost);

- return snprintf(buf, 20, "%d\n", cs->host->host_no);
+ return sysfs_emit(buf, "%d\n", cs->host->host_no);
}
static DEVICE_ATTR_RO(ctlr_num);

@@ -1361,22 +1361,22 @@ static ssize_t processor_show(struct device *dev,
}
}
if (first_processor && second_processor)
- ret = snprintf(buf, 64, "1: %s (%s, %d cpus)\n"
- "2: %s (%s, %d cpus)\n",
- info->cpu[0].cpu_name,
- first_processor, info->cpu[0].cpu_count,
- info->cpu[1].cpu_name,
- second_processor, info->cpu[1].cpu_count);
+ ret = sysfs_emit(buf, "1: %s (%s, %d cpus)\n"
+ "2: %s (%s, %d cpus)\n",
+ info->cpu[0].cpu_name,
+ first_processor, info->cpu[0].cpu_count,
+ info->cpu[1].cpu_name,
+ second_processor, info->cpu[1].cpu_count);
else if (first_processor && !second_processor)
- ret = snprintf(buf, 64, "1: %s (%s, %d cpus)\n2: absent\n",
- info->cpu[0].cpu_name,
- first_processor, info->cpu[0].cpu_count);
+ ret = sysfs_emit(buf, "1: %s (%s, %d cpus)\n2: absent\n",
+ info->cpu[0].cpu_name,
+ first_processor, info->cpu[0].cpu_count);
else if (!first_processor && second_processor)
- ret = snprintf(buf, 64, "1: absent\n2: %s (%s, %d cpus)\n",
- info->cpu[1].cpu_name,
- second_processor, info->cpu[1].cpu_count);
+ ret = sysfs_emit(buf, "1: absent\n2: %s (%s, %d cpus)\n",
+ info->cpu[1].cpu_name,
+ second_processor, info->cpu[1].cpu_count);
else
- ret = snprintf(buf, 64, "1: absent\n2: absent\n");
+ ret = sysfs_emit(buf, "1: absent\n2: absent\n");

return ret;
}
@@ -1388,7 +1388,7 @@ static ssize_t model_show(struct device *dev,
struct Scsi_Host *shost = class_to_shost(dev);
struct myrs_hba *cs = shost_priv(shost);

- return snprintf(buf, 28, "%s\n", cs->model_name);
+ return sysfs_emit(buf, "%s\n", cs->model_name);
}
static DEVICE_ATTR_RO(model);

@@ -1398,7 +1398,7 @@ static ssize_t ctlr_type_show(struct device *dev,
struct Scsi_Host *shost = class_to_shost(dev);
struct myrs_hba *cs = shost_priv(shost);

- return snprintf(buf, 4, "%d\n", cs->ctlr_info->ctlr_type);
+ return sysfs_emit(buf, "%d\n", cs->ctlr_info->ctlr_type);
}
static DEVICE_ATTR_RO(ctlr_type);

@@ -1408,7 +1408,7 @@ static ssize_t cache_size_show(struct device *dev,
struct Scsi_Host *shost = class_to_shost(dev);
struct myrs_hba *cs = shost_priv(shost);

- return snprintf(buf, 8, "%d MB\n", cs->ctlr_info->cache_size_mb);
+ return sysfs_emit(buf, "%d MB\n", cs->ctlr_info->cache_size_mb);
}
static DEVICE_ATTR_RO(cache_size);

@@ -1418,10 +1418,10 @@ static ssize_t firmware_show(struct device *dev,
struct Scsi_Host *shost = class_to_shost(dev);
struct myrs_hba *cs = shost_priv(shost);

- return snprintf(buf, 16, "%d.%02d-%02d\n",
- cs->ctlr_info->fw_major_version,
- cs->ctlr_info->fw_minor_version,
- cs->ctlr_info->fw_turn_number);
+ return sysfs_emit(buf, "%d.%02d-%02d\n",
+ cs->ctlr_info->fw_major_version,
+ cs->ctlr_info->fw_minor_version,
+ cs->ctlr_info->fw_turn_number);
}
static DEVICE_ATTR_RO(firmware);

@@ -1488,7 +1488,7 @@ static ssize_t disable_enclosure_messages_show(struct device *dev,
struct Scsi_Host *shost = class_to_shost(dev);
struct myrs_hba *cs = shost_priv(shost);

- return snprintf(buf, 3, "%d\n", cs->disable_enc_msg);
+ return sysfs_emit(buf, "%d\n", cs->disable_enc_msg);
}

static ssize_t disable_enclosure_messages_store(struct device *dev,
--
2.29.2

Next message: Li Zhijian: "[PATCH v2 10/25] scsi: qla4xxx: Convert sprintf() family to sysfs_emit() family"
Previous message: Li Zhijian: "[PATCH v2 12/25] scsi: snic: Convert sprintf() family to sysfs_emit() family"
In reply to: Karan Tilak Kumar (kartilak): "RE: [PATCH v2 12/25] scsi: snic: Convert sprintf() family to sysfs_emit() family"
Next in thread: Li Zhijian: "[PATCH v2 10/25] scsi: qla4xxx: Convert sprintf() family to sysfs_emit() family"
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