From 5e66f70e963e4ba2266071343f5a153c7db4327b Mon Sep 17 00:00:00 2001 From: Oleg Drokin Date: Thu, 21 May 2015 15:31:35 -0400 Subject: staging/lustre: Generic helpers for sysfs Add generic helpers to allow displaying oof lustre-specific values in /sys/fs/lustre Signed-off-by: Oleg Drokin Signed-off-by: Greg Kroah-Hartman --- .../staging/lustre/lustre/include/lprocfs_status.h | 21 +++++++++++++++++++ .../lustre/lustre/obdclass/lprocfs_status.c | 24 ++++++++++++++++++++++ 2 files changed, 45 insertions(+) diff --git a/drivers/staging/lustre/lustre/include/lprocfs_status.h b/drivers/staging/lustre/lustre/include/lprocfs_status.h index d030847..37f00e4 100644 --- a/drivers/staging/lustre/lustre/include/lprocfs_status.h +++ b/drivers/staging/lustre/lustre/include/lprocfs_status.h @@ -742,6 +742,27 @@ static struct file_operations name##_fops = { \ .release = lprocfs_single_release, \ } +struct lustre_attr { + struct attribute attr; + ssize_t (*show)(struct kobject *kobj, struct attribute *attr, + char *buf); + ssize_t (*store)(struct kobject *kobj, struct attribute *attr, + const char *buf, size_t len); +}; + +#define LUSTRE_ATTR(name, mode, show, store) \ +static struct lustre_attr lustre_attr_##name = __ATTR(name, mode, show, store) + +#define LUSTRE_RO_ATTR(name) LUSTRE_ATTR(name, 0444, name##_show, NULL) +#define LUSTRE_RW_ATTR(name) LUSTRE_ATTR(name, 0644, name##_show, name##_store) + +ssize_t lustre_attr_show(struct kobject *kobj, struct attribute *attr, + char *buf); +ssize_t lustre_attr_store(struct kobject *kobj, struct attribute *attr, + const char *buf, size_t len); + +extern const struct sysfs_ops lustre_sysfs_ops; + /* lproc_ptlrpc.c */ struct ptlrpc_request; extern void target_print_req(void *seq_file, struct ptlrpc_request *req); diff --git a/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c b/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c index c988be4..916d060 100644 --- a/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c +++ b/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c @@ -2056,3 +2056,27 @@ int lprocfs_obd_rd_max_pages_per_rpc(struct seq_file *m, void *data) EXPORT_SYMBOL(lprocfs_obd_rd_max_pages_per_rpc); #endif + +ssize_t lustre_attr_show(struct kobject *kobj, + struct attribute *attr, char *buf) +{ + struct lustre_attr *a = container_of(attr, struct lustre_attr, attr); + + return a->show ? a->show(kobj, attr, buf) : 0; +} +EXPORT_SYMBOL_GPL(lustre_attr_show); + +ssize_t lustre_attr_store(struct kobject *kobj, struct attribute *attr, + const char *buf, size_t len) +{ + struct lustre_attr *a = container_of(attr, struct lustre_attr, attr); + + return a->store ? a->store(kobj, attr, buf, len) : len; +} +EXPORT_SYMBOL_GPL(lustre_attr_store); + +const struct sysfs_ops lustre_sysfs_ops = { + .show = lustre_attr_show, + .store = lustre_attr_store, +}; +EXPORT_SYMBOL_GPL(lustre_sysfs_ops); -- cgit v1.1