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-rw-r--r--fs/exofs/Kbuild2
-rw-r--r--fs/exofs/exofs.h14
-rw-r--r--fs/exofs/super.c14
-rw-r--r--fs/exofs/sys.c200
4 files changed, 229 insertions, 1 deletions
diff --git a/fs/exofs/Kbuild b/fs/exofs/Kbuild
index 352ba14..389ba83 100644
--- a/fs/exofs/Kbuild
+++ b/fs/exofs/Kbuild
@@ -16,5 +16,5 @@
libore-y := ore.o ore_raid.o
obj-$(CONFIG_ORE) += libore.o
-exofs-y := inode.o file.o symlink.o namei.o dir.o super.o
+exofs-y := inode.o file.o symlink.o namei.o dir.o super.o sys.o
obj-$(CONFIG_EXOFS_FS) += exofs.o
diff --git a/fs/exofs/exofs.h b/fs/exofs/exofs.h
index ca9d496..fffe86f 100644
--- a/fs/exofs/exofs.h
+++ b/fs/exofs/exofs.h
@@ -56,6 +56,9 @@
struct exofs_dev {
struct ore_dev ored;
unsigned did;
+ unsigned urilen;
+ uint8_t *uri;
+ struct kobject ed_kobj;
};
/*
* our extension to the in-memory superblock
@@ -73,6 +76,7 @@ struct exofs_sb_info {
struct ore_layout layout; /* Default files layout */
struct ore_comp one_comp; /* id & cred of partition id=0*/
struct ore_components oc; /* comps for the partition */
+ struct kobject s_kobj; /* holds per-sbi kobject */
};
/*
@@ -176,6 +180,16 @@ void exofs_make_credential(u8 cred_a[OSD_CAP_LEN],
const struct osd_obj_id *obj);
int exofs_sbi_write_stats(struct exofs_sb_info *sbi);
+/* sys.c */
+int exofs_sysfs_init(void);
+void exofs_sysfs_uninit(void);
+int exofs_sysfs_sb_add(struct exofs_sb_info *sbi,
+ struct exofs_dt_device_info *dt_dev);
+void exofs_sysfs_sb_del(struct exofs_sb_info *sbi);
+int exofs_sysfs_odev_add(struct exofs_dev *edev,
+ struct exofs_sb_info *sbi);
+void exofs_sysfs_dbg_print(void);
+
/*********************
* operation vectors *
*********************/
diff --git a/fs/exofs/super.c b/fs/exofs/super.c
index 59e0849..4337836 100644
--- a/fs/exofs/super.c
+++ b/fs/exofs/super.c
@@ -472,6 +472,7 @@ static void exofs_put_super(struct super_block *sb)
_exofs_print_device("Unmounting", NULL, ore_comp_dev(&sbi->oc, 0),
sbi->one_comp.obj.partition);
+ exofs_sysfs_sb_del(sbi);
bdi_destroy(&sbi->bdi);
exofs_free_sbi(sbi);
sb->s_fs_info = NULL;
@@ -632,6 +633,12 @@ static int exofs_read_lookup_dev_table(struct exofs_sb_info *sbi,
memcpy(&sbi->oc.ods[numdevs], &sbi->oc.ods[0],
(numdevs - 1) * sizeof(sbi->oc.ods[0]));
+ /* create sysfs subdir under which we put the device table
+ * And cluster layout. A Superblock is identified by the string:
+ * "dev[0].osdname"_"pid"
+ */
+ exofs_sysfs_sb_add(sbi, &dt->dt_dev_table[0]);
+
for (i = 0; i < numdevs; i++) {
struct exofs_fscb fscb;
struct osd_dev_info odi;
@@ -657,6 +664,7 @@ static int exofs_read_lookup_dev_table(struct exofs_sb_info *sbi,
eds[i].ored.od = fscb_od;
++sbi->oc.numdevs;
fscb_od = NULL;
+ exofs_sysfs_odev_add(&eds[i], sbi);
continue;
}
@@ -682,6 +690,7 @@ static int exofs_read_lookup_dev_table(struct exofs_sb_info *sbi,
odi.osdname);
goto out;
}
+ exofs_sysfs_odev_add(&eds[i], sbi);
/* TODO: verify other information is correct and FS-uuid
* matches. Benny what did you say about device table
@@ -844,6 +853,7 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent)
goto free_sbi;
}
+ exofs_sysfs_dbg_print();
_exofs_print_device("Mounting", opts->dev_name,
ore_comp_dev(&sbi->oc, 0),
sbi->one_comp.obj.partition);
@@ -1023,6 +1033,9 @@ static int __init init_exofs(void)
if (err)
goto out_d;
+ /* We don't fail if sysfs creation failed */
+ exofs_sysfs_init();
+
return 0;
out_d:
destroy_inodecache();
@@ -1032,6 +1045,7 @@ out:
static void __exit exit_exofs(void)
{
+ exofs_sysfs_uninit();
unregister_filesystem(&exofs_type);
destroy_inodecache();
}
diff --git a/fs/exofs/sys.c b/fs/exofs/sys.c
new file mode 100644
index 0000000..e32bc91
--- /dev/null
+++ b/fs/exofs/sys.c
@@ -0,0 +1,200 @@
+/*
+ * Copyright (C) 2012
+ * Sachin Bhamare <sbhamare@panasas.com>
+ * Boaz Harrosh <bharrosh@panasas.com>
+ *
+ * This file is part of exofs.
+ *
+ * exofs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License 2 as published by
+ * the Free Software Foundation.
+ *
+ * exofs is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with exofs; if not, write to the:
+ * Free Software Foundation <licensing@fsf.org>
+ */
+
+#include <linux/kobject.h>
+#include <linux/device.h>
+
+#include "exofs.h"
+
+struct odev_attr {
+ struct attribute attr;
+ ssize_t (*show)(struct exofs_dev *, char *);
+ ssize_t (*store)(struct exofs_dev *, const char *, size_t);
+};
+
+static ssize_t odev_attr_show(struct kobject *kobj, struct attribute *attr,
+ char *buf)
+{
+ struct exofs_dev *edp = container_of(kobj, struct exofs_dev, ed_kobj);
+ struct odev_attr *a = container_of(attr, struct odev_attr, attr);
+
+ return a->show ? a->show(edp, buf) : 0;
+}
+
+static ssize_t odev_attr_store(struct kobject *kobj, struct attribute *attr,
+ const char *buf, size_t len)
+{
+ struct exofs_dev *edp = container_of(kobj, struct exofs_dev, ed_kobj);
+ struct odev_attr *a = container_of(attr, struct odev_attr, attr);
+
+ return a->store ? a->store(edp, buf, len) : len;
+}
+
+static const struct sysfs_ops odev_attr_ops = {
+ .show = odev_attr_show,
+ .store = odev_attr_store,
+};
+
+
+static struct kset *exofs_kset;
+
+static ssize_t osdname_show(struct exofs_dev *edp, char *buf)
+{
+ struct osd_dev *odev = edp->ored.od;
+ const struct osd_dev_info *odi = osduld_device_info(odev);
+
+ return snprintf(buf, odi->osdname_len + 1, "%s", odi->osdname);
+}
+
+static ssize_t systemid_show(struct exofs_dev *edp, char *buf)
+{
+ struct osd_dev *odev = edp->ored.od;
+ const struct osd_dev_info *odi = osduld_device_info(odev);
+
+ memcpy(buf, odi->systemid, odi->systemid_len);
+ return odi->systemid_len;
+}
+
+static ssize_t uri_show(struct exofs_dev *edp, char *buf)
+{
+ return snprintf(buf, edp->urilen, "%s", edp->uri);
+}
+
+static ssize_t uri_store(struct exofs_dev *edp, const char *buf, size_t len)
+{
+ edp->urilen = strlen(buf) + 1;
+ edp->uri = krealloc(edp->uri, edp->urilen, GFP_KERNEL);
+ strncpy(edp->uri, buf, edp->urilen);
+ return edp->urilen;
+}
+
+#define OSD_ATTR(name, mode, show, store) \
+ static struct odev_attr odev_attr_##name = \
+ __ATTR(name, mode, show, store)
+
+OSD_ATTR(osdname, S_IRUGO, osdname_show, NULL);
+OSD_ATTR(systemid, S_IRUGO, systemid_show, NULL);
+OSD_ATTR(uri, S_IRWXU, uri_show, uri_store);
+
+static struct attribute *odev_attrs[] = {
+ &odev_attr_osdname.attr,
+ &odev_attr_systemid.attr,
+ &odev_attr_uri.attr,
+ NULL,
+};
+
+static struct kobj_type odev_ktype = {
+ .default_attrs = odev_attrs,
+ .sysfs_ops = &odev_attr_ops,
+};
+
+static struct kobj_type uuid_ktype = {
+};
+
+void exofs_sysfs_dbg_print()
+{
+#ifdef CONFIG_EXOFS_DEBUG
+ struct kobject *k_name, *k_tmp;
+
+ list_for_each_entry_safe(k_name, k_tmp, &exofs_kset->list, entry) {
+ printk(KERN_INFO "%s: name %s ref %d\n",
+ __func__, kobject_name(k_name),
+ (int)atomic_read(&k_name->kref.refcount));
+ }
+#endif
+}
+/*
+ * This function removes all kobjects under exofs_kset
+ * At the end of it, exofs_kset kobject will have a refcount
+ * of 1 which gets decremented only on exofs module unload
+ */
+void exofs_sysfs_sb_del(struct exofs_sb_info *sbi)
+{
+ struct kobject *k_name, *k_tmp;
+ struct kobject *s_kobj = &sbi->s_kobj;
+
+ list_for_each_entry_safe(k_name, k_tmp, &exofs_kset->list, entry) {
+ /* Remove all that are children of this SBI */
+ if (k_name->parent == s_kobj)
+ kobject_put(k_name);
+ }
+ kobject_put(s_kobj);
+}
+
+/*
+ * This function creates sysfs entries to hold the current exofs cluster
+ * instance (uniquely identified by osdname,pid tuple).
+ * This function gets called once per exofs mount instance.
+ */
+int exofs_sysfs_sb_add(struct exofs_sb_info *sbi,
+ struct exofs_dt_device_info *dt_dev)
+{
+ struct kobject *s_kobj;
+ int retval = 0;
+ uint64_t pid = sbi->one_comp.obj.partition;
+
+ /* allocate new uuid dirent */
+ s_kobj = &sbi->s_kobj;
+ s_kobj->kset = exofs_kset;
+ retval = kobject_init_and_add(s_kobj, &uuid_ktype,
+ &exofs_kset->kobj, "%s_%llx", dt_dev->osdname, pid);
+ if (retval) {
+ EXOFS_ERR("ERROR: Failed to create sysfs entry for "
+ "uuid-%s_%llx => %d\n", dt_dev->osdname, pid, retval);
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+int exofs_sysfs_odev_add(struct exofs_dev *edev, struct exofs_sb_info *sbi)
+{
+ struct kobject *d_kobj;
+ int retval = 0;
+
+ /* create osd device group which contains following attributes
+ * osdname, systemid & uri
+ */
+ d_kobj = &edev->ed_kobj;
+ d_kobj->kset = exofs_kset;
+ retval = kobject_init_and_add(d_kobj, &odev_ktype,
+ &sbi->s_kobj, "dev%u", edev->did);
+ if (retval) {
+ EXOFS_ERR("ERROR: Failed to create sysfs entry for "
+ "device dev%u\n", edev->did);
+ return retval;
+ }
+ return 0;
+}
+
+int exofs_sysfs_init(void)
+{
+ exofs_kset = kset_create_and_add("exofs", NULL, fs_kobj);
+ if (!exofs_kset) {
+ EXOFS_ERR("ERROR: kset_create_and_add exofs failed\n");
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+void exofs_sysfs_uninit(void)
+{
+ kset_unregister(exofs_kset);
+}
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