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Commit a01ee165 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osd 

Pull exofs updates from Boaz Harrosh:
 "Just a couple of patches.  The first is a BUG fix destined for stable
  which missed the 3.4-rc7 Kernel.  The second is just a fixture
  addition so exofs is able to be better exported as a cluster file
  system via pNFS."

* 'for-linus' of git://git.open-osd.org/linux-open-osd:
  exofs: Add SYSFS info for autologin/pNFS export
  exofs: Fix CRASH on very early IO errors.
parents d766023e 8b56a30c

fs/exofs/Kbuild

+1 −1
Original line number Diff line number Diff line
@@ -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

fs/exofs/exofs.h

+14 −0
Original line number Diff line number Diff line
@@ -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 *

 *********************/

fs/exofs/super.c

+15 −1
Original line number Diff line number Diff line
@@ -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
@@ -745,7 +754,6 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent) 
	sbi->one_comp.obj.partition = opts->pid;

	sbi->one_comp.obj.id = 0;

	exofs_make_credential(sbi->one_comp.cred, &sbi->one_comp.obj);

	sbi->oc.numdevs = 1;

	sbi->oc.single_comp = EC_SINGLE_COMP;

	sbi->oc.comps = &sbi->one_comp;
@@ -804,6 +812,7 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent) 
			goto free_sbi;



		ore_comp_set_dev(&sbi->oc, 0, od);

		sbi->oc.numdevs = 1;

	}



	__sbi_read_stats(sbi);
@@ -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();

}

fs/exofs/sys.c

0 → 100644
+200 −0
Original line number Diff line number Diff line 
/*

 * 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);

}