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@@ -0,0 +1,200 @@
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+/*
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+ * Copyright (C) 2012
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+ * Sachin Bhamare <sbhamare@panasas.com>
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+ * Boaz Harrosh <bharrosh@panasas.com>
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+ *
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+ * This file is part of exofs.
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+ *
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+ * exofs is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License 2 as published by
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+ * the Free Software Foundation.
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+ *
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+ * exofs is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with exofs; if not, write to the:
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+ * Free Software Foundation <licensing@fsf.org>
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+ */
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+
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+#include <linux/kobject.h>
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+#include <linux/device.h>
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+
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+#include "exofs.h"
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+
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+struct odev_attr {
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+ struct attribute attr;
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+ ssize_t (*show)(struct exofs_dev *, char *);
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+ ssize_t (*store)(struct exofs_dev *, const char *, size_t);
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+};
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+
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+static ssize_t odev_attr_show(struct kobject *kobj, struct attribute *attr,
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+ char *buf)
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+{
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+ struct exofs_dev *edp = container_of(kobj, struct exofs_dev, ed_kobj);
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+ struct odev_attr *a = container_of(attr, struct odev_attr, attr);
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+
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+ return a->show ? a->show(edp, buf) : 0;
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+}
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+
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+static ssize_t odev_attr_store(struct kobject *kobj, struct attribute *attr,
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+ const char *buf, size_t len)
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+{
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+ struct exofs_dev *edp = container_of(kobj, struct exofs_dev, ed_kobj);
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+ struct odev_attr *a = container_of(attr, struct odev_attr, attr);
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+
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+ return a->store ? a->store(edp, buf, len) : len;
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+}
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+
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+static const struct sysfs_ops odev_attr_ops = {
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+ .show = odev_attr_show,
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+ .store = odev_attr_store,
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+};
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+
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+
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+static struct kset *exofs_kset;
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+
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+static ssize_t osdname_show(struct exofs_dev *edp, char *buf)
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+{
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+ struct osd_dev *odev = edp->ored.od;
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+ const struct osd_dev_info *odi = osduld_device_info(odev);
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+
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+ return snprintf(buf, odi->osdname_len + 1, "%s", odi->osdname);
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+}
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+
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+static ssize_t systemid_show(struct exofs_dev *edp, char *buf)
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+{
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+ struct osd_dev *odev = edp->ored.od;
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+ const struct osd_dev_info *odi = osduld_device_info(odev);
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+
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+ memcpy(buf, odi->systemid, odi->systemid_len);
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+ return odi->systemid_len;
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+}
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+
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+static ssize_t uri_show(struct exofs_dev *edp, char *buf)
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+{
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+ return snprintf(buf, edp->urilen, "%s", edp->uri);
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+}
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+
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+static ssize_t uri_store(struct exofs_dev *edp, const char *buf, size_t len)
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+{
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+ edp->urilen = strlen(buf) + 1;
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+ edp->uri = krealloc(edp->uri, edp->urilen, GFP_KERNEL);
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+ strncpy(edp->uri, buf, edp->urilen);
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+ return edp->urilen;
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+}
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+
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+#define OSD_ATTR(name, mode, show, store) \
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+ static struct odev_attr odev_attr_##name = \
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+ __ATTR(name, mode, show, store)
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+
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+OSD_ATTR(osdname, S_IRUGO, osdname_show, NULL);
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+OSD_ATTR(systemid, S_IRUGO, systemid_show, NULL);
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+OSD_ATTR(uri, S_IRWXU, uri_show, uri_store);
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+
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+static struct attribute *odev_attrs[] = {
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+ &odev_attr_osdname.attr,
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+ &odev_attr_systemid.attr,
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+ &odev_attr_uri.attr,
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+ NULL,
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+};
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+
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+static struct kobj_type odev_ktype = {
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+ .default_attrs = odev_attrs,
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+ .sysfs_ops = &odev_attr_ops,
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+};
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+
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+static struct kobj_type uuid_ktype = {
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+};
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+
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+void exofs_sysfs_dbg_print()
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+{
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+#ifdef CONFIG_EXOFS_DEBUG
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+ struct kobject *k_name, *k_tmp;
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+
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+ list_for_each_entry_safe(k_name, k_tmp, &exofs_kset->list, entry) {
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+ printk(KERN_INFO "%s: name %s ref %d\n",
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+ __func__, kobject_name(k_name),
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+ (int)atomic_read(&k_name->kref.refcount));
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+ }
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+#endif
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+}
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+/*
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+ * This function removes all kobjects under exofs_kset
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+ * At the end of it, exofs_kset kobject will have a refcount
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+ * of 1 which gets decremented only on exofs module unload
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+ */
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+void exofs_sysfs_sb_del(struct exofs_sb_info *sbi)
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+{
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+ struct kobject *k_name, *k_tmp;
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+ struct kobject *s_kobj = &sbi->s_kobj;
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+
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+ list_for_each_entry_safe(k_name, k_tmp, &exofs_kset->list, entry) {
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+ /* Remove all that are children of this SBI */
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+ if (k_name->parent == s_kobj)
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+ kobject_put(k_name);
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+ }
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+ kobject_put(s_kobj);
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+}
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+
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+/*
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+ * This function creates sysfs entries to hold the current exofs cluster
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+ * instance (uniquely identified by osdname,pid tuple).
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+ * This function gets called once per exofs mount instance.
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+ */
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+int exofs_sysfs_sb_add(struct exofs_sb_info *sbi,
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+ struct exofs_dt_device_info *dt_dev)
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+{
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+ struct kobject *s_kobj;
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+ int retval = 0;
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+ uint64_t pid = sbi->one_comp.obj.partition;
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+
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+ /* allocate new uuid dirent */
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+ s_kobj = &sbi->s_kobj;
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+ s_kobj->kset = exofs_kset;
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+ retval = kobject_init_and_add(s_kobj, &uuid_ktype,
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+ &exofs_kset->kobj, "%s_%llx", dt_dev->osdname, pid);
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+ if (retval) {
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+ EXOFS_ERR("ERROR: Failed to create sysfs entry for "
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+ "uuid-%s_%llx => %d\n", dt_dev->osdname, pid, retval);
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+ return -ENOMEM;
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+ }
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+ return 0;
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+}
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+
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+int exofs_sysfs_odev_add(struct exofs_dev *edev, struct exofs_sb_info *sbi)
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+{
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+ struct kobject *d_kobj;
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+ int retval = 0;
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+
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+ /* create osd device group which contains following attributes
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+ * osdname, systemid & uri
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+ */
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+ d_kobj = &edev->ed_kobj;
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+ d_kobj->kset = exofs_kset;
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+ retval = kobject_init_and_add(d_kobj, &odev_ktype,
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+ &sbi->s_kobj, "dev%u", edev->did);
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+ if (retval) {
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+ EXOFS_ERR("ERROR: Failed to create sysfs entry for "
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+ "device dev%u\n", edev->did);
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+ return retval;
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+ }
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+ return 0;
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+}
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+
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+int exofs_sysfs_init(void)
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+{
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+ exofs_kset = kset_create_and_add("exofs", NULL, fs_kobj);
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+ if (!exofs_kset) {
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+ EXOFS_ERR("ERROR: kset_create_and_add exofs failed\n");
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+ return -ENOMEM;
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+ }
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+ return 0;
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+}
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+
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+void exofs_sysfs_uninit(void)
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+{
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+ kset_unregister(exofs_kset);
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+}
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Linus Torvalds