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| author | Corey Minyard <cminyard@mvista.com> | 2022-03-29 13:13:34 -0500 |
|---|---|---|
| committer | Corey Minyard <cminyard@mvista.com> | 2022-05-12 10:00:03 -0500 |
| commit | d5d91586beda89b204dd1956a27e3ed2309ea995 (patch) | |
| tree | 4ab569252d0d00f61a19ea626ddbb486560c0456 | |
| parent | f60231885fa986fcd5503f4eb9ef3e53a2002b12 (diff) | |
| download | linux-d5d91586beda89b204dd1956a27e3ed2309ea995.tar.gz linux-d5d91586beda89b204dd1956a27e3ed2309ea995.tar.bz2 linux-d5d91586beda89b204dd1956a27e3ed2309ea995.zip | |
ipmi: Add a sysfs count of total outstanding messages for an interface
Go through each user and add its message count to a total and print the
total.
It would be nice to have a per-user file, but there's no user sysfs
entity at this point to hang it off of. Probably not worth the effort.
Based on work by Chen Guanqiao <chen.chenchacha@foxmail.com>
Cc: Chen Guanqiao <chen.chenchacha@foxmail.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
| -rw-r--r-- | drivers/char/ipmi/ipmi_msghandler.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/char/ipmi/ipmi_msghandler.c b/drivers/char/ipmi/ipmi_msghandler.c index 8b5d39793997..5d033fadba6a 100644 --- a/drivers/char/ipmi/ipmi_msghandler.c +++ b/drivers/char/ipmi/ipmi_msghandler.c @@ -458,6 +458,7 @@ struct ipmi_smi { struct srcu_struct users_srcu; atomic_t nr_users; struct device_attribute nr_users_devattr; + struct device_attribute nr_msgs_devattr; /* Used for wake ups at startup. */ @@ -3519,6 +3520,25 @@ static ssize_t nr_users_show(struct device *dev, } static DEVICE_ATTR_RO(nr_users); +static ssize_t nr_msgs_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct ipmi_smi *intf = container_of(attr, + struct ipmi_smi, nr_msgs_devattr); + struct ipmi_user *user; + int index; + unsigned int count = 0; + + index = srcu_read_lock(&intf->users_srcu); + list_for_each_entry_rcu(user, &intf->users, link) + count += atomic_read(&user->nr_msgs); + srcu_read_unlock(&intf->users_srcu, index); + + return sysfs_emit(buf, "%u\n", count); +} +static DEVICE_ATTR_RO(nr_msgs); + static void redo_bmc_reg(struct work_struct *work) { struct ipmi_smi *intf = container_of(work, struct ipmi_smi, @@ -3647,6 +3667,14 @@ int ipmi_add_smi(struct module *owner, if (rv) goto out_err_bmc_reg; + intf->nr_msgs_devattr = dev_attr_nr_msgs; + sysfs_attr_init(&intf->nr_msgs_devattr.attr); + rv = device_create_file(intf->si_dev, &intf->nr_msgs_devattr); + if (rv) { + device_remove_file(intf->si_dev, &intf->nr_users_devattr); + goto out_err_bmc_reg; + } + /* * Keep memory order straight for RCU readers. Make * sure everything else is committed to memory before @@ -3746,6 +3774,7 @@ void ipmi_unregister_smi(struct ipmi_smi *intf) /* At this point no users can be added to the interface. */ + device_remove_file(intf->si_dev, &intf->nr_msgs_devattr); device_remove_file(intf->si_dev, &intf->nr_users_devattr); /* |