scsi: fs: remove exofs

This was an example for using the SCSI OSD protocol, which we're trying
to remove.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

1 files changed, 0 insertions, 1071 deletions

diff --git a/fs/exofs/super.c b/fs/exofs/super.c
deleted file mode 100644
index fc80c7233fa5..000000000000
--- a/fs/exofs/super.c
+++ /dev/null
@@ -1,1071 +0,0 @@
-/*
- * Copyright (C) 2005, 2006
- * Avishay Traeger (avishay@gmail.com)
- * Copyright (C) 2008, 2009
- * Boaz Harrosh <ooo@electrozaur.com>
- *
- * Copyrights for code taken from ext2:
- *     Copyright (C) 1992, 1993, 1994, 1995
- *     Remy Card (card@masi.ibp.fr)
- *     Laboratoire MASI - Institut Blaise Pascal
- *     Universite Pierre et Marie Curie (Paris VI)
- *     from
- *     linux/fs/minix/inode.c
- *     Copyright (C) 1991, 1992  Linus Torvalds
- *
- * 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 as published by
- * the Free Software Foundation.  Since it is based on ext2, and the only
- * valid version of GPL for the Linux kernel is version 2, the only valid
- * version of GPL for exofs is version 2.
- *
- * 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, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- */
-
-#include <linux/string.h>
-#include <linux/parser.h>
-#include <linux/vfs.h>
-#include <linux/random.h>
-#include <linux/module.h>
-#include <linux/exportfs.h>
-#include <linux/slab.h>
-#include <linux/iversion.h>
-
-#include "exofs.h"
-
-#define EXOFS_DBGMSG2(M...) do {} while (0)
-
-/******************************************************************************
- * MOUNT OPTIONS
- *****************************************************************************/
-
-/*
- * struct to hold what we get from mount options
- */
-struct exofs_mountopt {
-	bool is_osdname;
-	const char *dev_name;
-	uint64_t pid;
-	int timeout;
-};
-
-/*
- * exofs-specific mount-time options.
- */
-enum { Opt_name, Opt_pid, Opt_to, Opt_err };
-
-/*
- * Our mount-time options.  These should ideally be 64-bit unsigned, but the
- * kernel's parsing functions do not currently support that.  32-bit should be
- * sufficient for most applications now.
- */
-static match_table_t tokens = {
-	{Opt_name, "osdname=%s"},
-	{Opt_pid, "pid=%u"},
-	{Opt_to, "to=%u"},
-	{Opt_err, NULL}
-};
-
-/*
- * The main option parsing method.  Also makes sure that all of the mandatory
- * mount options were set.
- */
-static int parse_options(char *options, struct exofs_mountopt *opts)
-{
-	char *p;
-	substring_t args[MAX_OPT_ARGS];
-	int option;
-	bool s_pid = false;
-
-	EXOFS_DBGMSG("parse_options %s\n", options);
-	/* defaults */
-	memset(opts, 0, sizeof(*opts));
-	opts->timeout = BLK_DEFAULT_SG_TIMEOUT;
-
-	while ((p = strsep(&options, ",")) != NULL) {
-		int token;
-		char str[32];
-
-		if (!*p)
-			continue;
-
-		token = match_token(p, tokens, args);
-		switch (token) {
-		case Opt_name:
-			kfree(opts->dev_name);
-			opts->dev_name = match_strdup(&args[0]);
-			if (unlikely(!opts->dev_name)) {
-				EXOFS_ERR("Error allocating dev_name");
-				return -ENOMEM;
-			}
-			opts->is_osdname = true;
-			break;
-		case Opt_pid:
-			if (0 == match_strlcpy(str, &args[0], sizeof(str)))
-				return -EINVAL;
-			opts->pid = simple_strtoull(str, NULL, 0);
-			if (opts->pid < EXOFS_MIN_PID) {
-				EXOFS_ERR("Partition ID must be >= %u",
-					  EXOFS_MIN_PID);
-				return -EINVAL;
-			}
-			s_pid = true;
-			break;
-		case Opt_to:
-			if (match_int(&args[0], &option))
-				return -EINVAL;
-			if (option <= 0) {
-				EXOFS_ERR("Timeout must be > 0");
-				return -EINVAL;
-			}
-			opts->timeout = option * HZ;
-			break;
-		}
-	}
-
-	if (!s_pid) {
-		EXOFS_ERR("Need to specify the following options:\n");
-		EXOFS_ERR("    -o pid=pid_no_to_use\n");
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-/******************************************************************************
- * INODE CACHE
- *****************************************************************************/
-
-/*
- * Our inode cache.  Isn't it pretty?
- */
-static struct kmem_cache *exofs_inode_cachep;
-
-/*
- * Allocate an inode in the cache
- */
-static struct inode *exofs_alloc_inode(struct super_block *sb)
-{
-	struct exofs_i_info *oi;
-
-	oi = kmem_cache_alloc(exofs_inode_cachep, GFP_KERNEL);
-	if (!oi)
-		return NULL;
-
-	inode_set_iversion(&oi->vfs_inode, 1);
-	return &oi->vfs_inode;
-}
-
-static void exofs_i_callback(struct rcu_head *head)
-{
-	struct inode *inode = container_of(head, struct inode, i_rcu);
-	kmem_cache_free(exofs_inode_cachep, exofs_i(inode));
-}
-
-/*
- * Remove an inode from the cache
- */
-static void exofs_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, exofs_i_callback);
-}
-
-/*
- * Initialize the inode
- */
-static void exofs_init_once(void *foo)
-{
-	struct exofs_i_info *oi = foo;
-
-	inode_init_once(&oi->vfs_inode);
-}
-
-/*
- * Create and initialize the inode cache
- */
-static int init_inodecache(void)
-{
-	exofs_inode_cachep = kmem_cache_create_usercopy("exofs_inode_cache",
-				sizeof(struct exofs_i_info), 0,
-				SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD |
-				SLAB_ACCOUNT,
-				offsetof(struct exofs_i_info, i_data),
-				sizeof_field(struct exofs_i_info, i_data),
-				exofs_init_once);
-	if (exofs_inode_cachep == NULL)
-		return -ENOMEM;
-	return 0;
-}
-
-/*
- * Destroy the inode cache
- */
-static void destroy_inodecache(void)
-{
-	/*
-	 * Make sure all delayed rcu free inodes are flushed before we
-	 * destroy cache.
-	 */
-	rcu_barrier();
-	kmem_cache_destroy(exofs_inode_cachep);
-}
-
-/******************************************************************************
- * Some osd helpers
- *****************************************************************************/
-void exofs_make_credential(u8 cred_a[OSD_CAP_LEN], const struct osd_obj_id *obj)
-{
-	osd_sec_init_nosec_doall_caps(cred_a, obj, false, true);
-}
-
-static int exofs_read_kern(struct osd_dev *od, u8 *cred, struct osd_obj_id *obj,
-		    u64 offset, void *p, unsigned length)
-{
-	struct osd_request *or = osd_start_request(od);
-/*	struct osd_sense_info osi = {.key = 0};*/
-	int ret;
-
-	if (unlikely(!or)) {
-		EXOFS_DBGMSG("%s: osd_start_request failed.\n", __func__);
-		return -ENOMEM;
-	}
-	ret = osd_req_read_kern(or, obj, offset, p, length);
-	if (unlikely(ret)) {
-		EXOFS_DBGMSG("%s: osd_req_read_kern failed.\n", __func__);
-		goto out;
-	}
-
-	ret = osd_finalize_request(or, 0, cred, NULL);
-	if (unlikely(ret)) {
-		EXOFS_DBGMSG("Failed to osd_finalize_request() => %d\n", ret);
-		goto out;
-	}
-
-	ret = osd_execute_request(or);
-	if (unlikely(ret))
-		EXOFS_DBGMSG("osd_execute_request() => %d\n", ret);
-	/* osd_req_decode_sense(or, ret); */
-
-out:
-	osd_end_request(or);
-	EXOFS_DBGMSG2("read_kern(0x%llx) offset=0x%llx "
-		      "length=0x%llx dev=%p ret=>%d\n",
-		      _LLU(obj->id), _LLU(offset), _LLU(length), od, ret);
-	return ret;
-}
-
-static const struct osd_attr g_attr_sb_stats = ATTR_DEF(
-	EXOFS_APAGE_SB_DATA,
-	EXOFS_ATTR_SB_STATS,
-	sizeof(struct exofs_sb_stats));
-
-static int __sbi_read_stats(struct exofs_sb_info *sbi)
-{
-	struct osd_attr attrs[] = {
-		[0] = g_attr_sb_stats,
-	};
-	struct ore_io_state *ios;
-	int ret;
-
-	ret = ore_get_io_state(&sbi->layout, &sbi->oc, &ios);
-	if (unlikely(ret)) {
-		EXOFS_ERR("%s: ore_get_io_state failed.\n", __func__);
-		return ret;
-	}
-
-	ios->in_attr = attrs;
-	ios->in_attr_len = ARRAY_SIZE(attrs);
-
-	ret = ore_read(ios);
-	if (unlikely(ret)) {
-		EXOFS_ERR("Error reading super_block stats => %d\n", ret);
-		goto out;
-	}
-
-	ret = extract_attr_from_ios(ios, &attrs[0]);
-	if (ret) {
-		EXOFS_ERR("%s: extract_attr of sb_stats failed\n", __func__);
-		goto out;
-	}
-	if (attrs[0].len) {
-		struct exofs_sb_stats *ess;
-
-		if (unlikely(attrs[0].len != sizeof(*ess))) {
-			EXOFS_ERR("%s: Wrong version of exofs_sb_stats "
-				  "size(%d) != expected(%zd)\n",
-				  __func__, attrs[0].len, sizeof(*ess));
-			goto out;
-		}
-
-		ess = attrs[0].val_ptr;
-		sbi->s_nextid = le64_to_cpu(ess->s_nextid);
-		sbi->s_numfiles = le32_to_cpu(ess->s_numfiles);
-	}
-
-out:
-	ore_put_io_state(ios);
-	return ret;
-}
-
-static void stats_done(struct ore_io_state *ios, void *p)
-{
-	ore_put_io_state(ios);
-	/* Good thanks nothing to do anymore */
-}
-
-/* Asynchronously write the stats attribute */
-int exofs_sbi_write_stats(struct exofs_sb_info *sbi)
-{
-	struct osd_attr attrs[] = {
-		[0] = g_attr_sb_stats,
-	};
-	struct ore_io_state *ios;
-	int ret;
-
-	ret = ore_get_io_state(&sbi->layout, &sbi->oc, &ios);
-	if (unlikely(ret)) {
-		EXOFS_ERR("%s: ore_get_io_state failed.\n", __func__);
-		return ret;
-	}
-
-	sbi->s_ess.s_nextid   = cpu_to_le64(sbi->s_nextid);
-	sbi->s_ess.s_numfiles = cpu_to_le64(sbi->s_numfiles);
-	attrs[0].val_ptr = &sbi->s_ess;
-
-
-	ios->done = stats_done;
-	ios->private = sbi;
-	ios->out_attr = attrs;
-	ios->out_attr_len = ARRAY_SIZE(attrs);
-
-	ret = ore_write(ios);
-	if (unlikely(ret)) {
-		EXOFS_ERR("%s: ore_write failed.\n", __func__);
-		ore_put_io_state(ios);
-	}
-
-	return ret;
-}
-
-/******************************************************************************
- * SUPERBLOCK FUNCTIONS
- *****************************************************************************/
-static const struct super_operations exofs_sops;
-static const struct export_operations exofs_export_ops;
-
-/*
- * Write the superblock to the OSD
- */
-static int exofs_sync_fs(struct super_block *sb, int wait)
-{
-	struct exofs_sb_info *sbi;
-	struct exofs_fscb *fscb;
-	struct ore_comp one_comp;
-	struct ore_components oc;
-	struct ore_io_state *ios;
-	int ret = -ENOMEM;
-
-	fscb = kmalloc(sizeof(*fscb), GFP_KERNEL);
-	if (unlikely(!fscb))
-		return -ENOMEM;
-
-	sbi = sb->s_fs_info;
-
-	/* NOTE: We no longer dirty the super_block anywhere in exofs. The
-	 * reason we write the fscb here on unmount is so we can stay backwards
-	 * compatible with fscb->s_version == 1. (What we are not compatible
-	 * with is if a new version FS crashed and then we try to mount an old
-	 * version). Otherwise the exofs_fscb is read-only from mkfs time. All
-	 * the writeable info is set in exofs_sbi_write_stats() above.
-	 */
-
-	exofs_init_comps(&oc, &one_comp, sbi, EXOFS_SUPER_ID);
-
-	ret = ore_get_io_state(&sbi->layout, &oc, &ios);
-	if (unlikely(ret))
-		goto out;
-
-	ios->length = offsetof(struct exofs_fscb, s_dev_table_oid);
-	memset(fscb, 0, ios->length);
-	fscb->s_nextid = cpu_to_le64(sbi->s_nextid);
-	fscb->s_numfiles = cpu_to_le64(sbi->s_numfiles);
-	fscb->s_magic = cpu_to_le16(sb->s_magic);
-	fscb->s_newfs = 0;
-	fscb->s_version = EXOFS_FSCB_VER;
-
-	ios->offset = 0;
-	ios->kern_buff = fscb;
-
-	ret = ore_write(ios);
-	if (unlikely(ret))
-		EXOFS_ERR("%s: ore_write failed.\n", __func__);
-
-out:
-	EXOFS_DBGMSG("s_nextid=0x%llx ret=%d\n", _LLU(sbi->s_nextid), ret);
-	ore_put_io_state(ios);
-	kfree(fscb);
-	return ret;
-}
-
-static void _exofs_print_device(const char *msg, const char *dev_path,
-				struct osd_dev *od, u64 pid)
-{
-	const struct osd_dev_info *odi = osduld_device_info(od);
-
-	printk(KERN_NOTICE "exofs: %s %s osd_name-%s pid-0x%llx\n",
-		msg, dev_path ?: "", odi->osdname, _LLU(pid));
-}
-
-static void exofs_free_sbi(struct exofs_sb_info *sbi)
-{
-	unsigned numdevs = sbi->oc.numdevs;
-
-	while (numdevs) {
-		unsigned i = --numdevs;
-		struct osd_dev *od = ore_comp_dev(&sbi->oc, i);
-
-		if (od) {
-			ore_comp_set_dev(&sbi->oc, i, NULL);
-			osduld_put_device(od);
-		}
-	}
-	kfree(sbi->oc.ods);
-	kfree(sbi);
-}
-
-/*
- * This function is called when the vfs is freeing the superblock.  We just
- * need to free our own part.
- */
-static void exofs_put_super(struct super_block *sb)
-{
-	int num_pend;
-	struct exofs_sb_info *sbi = sb->s_fs_info;
-
-	/* make sure there are no pending commands */
-	for (num_pend = atomic_read(&sbi->s_curr_pending); num_pend > 0;
-	     num_pend = atomic_read(&sbi->s_curr_pending)) {
-		wait_queue_head_t wq;
-
-		printk(KERN_NOTICE "%s: !!Pending operations in flight. "
-		       "This is a BUG. please report to osd-dev@open-osd.org\n",
-		       __func__);
-		init_waitqueue_head(&wq);
-		wait_event_timeout(wq,
-				  (atomic_read(&sbi->s_curr_pending) == 0),
-				  msecs_to_jiffies(100));
-	}
-
-	_exofs_print_device("Unmounting", NULL, ore_comp_dev(&sbi->oc, 0),
-			    sbi->one_comp.obj.partition);
-
-	exofs_sysfs_sb_del(sbi);
-	exofs_free_sbi(sbi);
-	sb->s_fs_info = NULL;
-}
-
-static int _read_and_match_data_map(struct exofs_sb_info *sbi, unsigned numdevs,
-				    struct exofs_device_table *dt)
-{
-	int ret;
-
-	sbi->layout.stripe_unit =
-				le64_to_cpu(dt->dt_data_map.cb_stripe_unit);
-	sbi->layout.group_width =
-				le32_to_cpu(dt->dt_data_map.cb_group_width);
-	sbi->layout.group_depth =
-				le32_to_cpu(dt->dt_data_map.cb_group_depth);
-	sbi->layout.mirrors_p1  =
-				le32_to_cpu(dt->dt_data_map.cb_mirror_cnt) + 1;
-	sbi->layout.raid_algorithm  =
-				le32_to_cpu(dt->dt_data_map.cb_raid_algorithm);
-
-	ret = ore_verify_layout(numdevs, &sbi->layout);
-
-	EXOFS_DBGMSG("exofs: layout: "
-		"num_comps=%u stripe_unit=0x%x group_width=%u "
-		"group_depth=0x%llx mirrors_p1=%u raid_algorithm=%u\n",
-		numdevs,
-		sbi->layout.stripe_unit,
-		sbi->layout.group_width,
-		_LLU(sbi->layout.group_depth),
-		sbi->layout.mirrors_p1,
-		sbi->layout.raid_algorithm);
-	return ret;
-}
-
-static unsigned __ra_pages(struct ore_layout *layout)
-{
-	const unsigned _MIN_RA = 32; /* min 128K read-ahead */
-	unsigned ra_pages = layout->group_width * layout->stripe_unit /
-				PAGE_SIZE;
-	unsigned max_io_pages = exofs_max_io_pages(layout, ~0);
-
-	ra_pages *= 2; /* two stripes */
-	if (ra_pages < _MIN_RA)
-		ra_pages = roundup(_MIN_RA, ra_pages / 2);
-
-	if (ra_pages > max_io_pages)
-		ra_pages = max_io_pages;
-
-	return ra_pages;
-}
-
-/* @odi is valid only as long as @fscb_dev is valid */
-static int exofs_devs_2_odi(struct exofs_dt_device_info *dt_dev,
-			     struct osd_dev_info *odi)
-{
-	odi->systemid_len = le32_to_cpu(dt_dev->systemid_len);
-	if (likely(odi->systemid_len))
-		memcpy(odi->systemid, dt_dev->systemid, OSD_SYSTEMID_LEN);
-
-	odi->osdname_len = le32_to_cpu(dt_dev->osdname_len);
-	odi->osdname = dt_dev->osdname;
-
-	/* FIXME support long names. Will need a _put function */
-	if (dt_dev->long_name_offset)
-		return -EINVAL;
-
-	/* Make sure osdname is printable!
-	 * mkexofs should give us space for a null-terminator else the
-	 * device-table is invalid.
-	 */
-	if (unlikely(odi->osdname_len >= sizeof(dt_dev->osdname)))
-		odi->osdname_len = sizeof(dt_dev->osdname) - 1;
-	dt_dev->osdname[odi->osdname_len] = 0;
-
-	/* If it's all zeros something is bad we read past end-of-obj */
-	return !(odi->systemid_len || odi->osdname_len);
-}
-
-static int __alloc_dev_table(struct exofs_sb_info *sbi, unsigned numdevs,
-		      struct exofs_dev **peds)
-{
-	/* Twice bigger table: See exofs_init_comps() and comment at
-	 * exofs_read_lookup_dev_table()
-	 */
-	const size_t numores = numdevs * 2 - 1;
-	struct exofs_dev *eds;
-	unsigned i;
-
-	sbi->oc.ods = kzalloc(numores * sizeof(struct ore_dev *) +
-			      numdevs * sizeof(struct exofs_dev), GFP_KERNEL);
-	if (unlikely(!sbi->oc.ods)) {
-		EXOFS_ERR("ERROR: failed allocating Device array[%d]\n",
-			  numdevs);
-		return -ENOMEM;
-	}
-
-	/* Start of allocated struct exofs_dev entries */
-	*peds = eds = (void *)sbi->oc.ods[numores];
-	/* Initialize pointers into struct exofs_dev */
-	for (i = 0; i < numdevs; ++i)
-		sbi->oc.ods[i] = &eds[i].ored;
-	return 0;
-}
-
-static int exofs_read_lookup_dev_table(struct exofs_sb_info *sbi,
-				       struct osd_dev *fscb_od,
-				       unsigned table_count)
-{
-	struct ore_comp comp;
-	struct exofs_device_table *dt;
-	struct exofs_dev *eds;
-	unsigned table_bytes = table_count * sizeof(dt->dt_dev_table[0]) +
-					     sizeof(*dt);
-	unsigned numdevs, i;
-	int ret;
-
-	dt = kmalloc(table_bytes, GFP_KERNEL);
-	if (unlikely(!dt)) {
-		EXOFS_ERR("ERROR: allocating %x bytes for device table\n",
-			  table_bytes);
-		return -ENOMEM;
-	}
-
-	sbi->oc.numdevs = 0;
-
-	comp.obj.partition = sbi->one_comp.obj.partition;
-	comp.obj.id = EXOFS_DEVTABLE_ID;
-	exofs_make_credential(comp.cred, &comp.obj);
-
-	ret = exofs_read_kern(fscb_od, comp.cred, &comp.obj, 0, dt,
-			      table_bytes);
-	if (unlikely(ret)) {
-		EXOFS_ERR("ERROR: reading device table\n");
-		goto out;
-	}
-
-	numdevs = le64_to_cpu(dt->dt_num_devices);
-	if (unlikely(!numdevs)) {
-		ret = -EINVAL;
-		goto out;
-	}
-	WARN_ON(table_count != numdevs);
-
-	ret = _read_and_match_data_map(sbi, numdevs, dt);
-	if (unlikely(ret))
-		goto out;
-
-	ret = __alloc_dev_table(sbi, numdevs, &eds);
-	if (unlikely(ret))
-		goto out;
-	/* exofs round-robins the device table view according to inode
-	 * number. We hold a: twice bigger table hence inodes can point
-	 * to any device and have a sequential view of the table
-	 * starting at this device. See exofs_init_comps()
-	 */
-	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;
-		struct osd_dev *od;
-
-		if (exofs_devs_2_odi(&dt->dt_dev_table[i], &odi)) {
-			EXOFS_ERR("ERROR: Read all-zeros device entry\n");
-			ret = -EINVAL;
-			goto out;
-		}
-
-		printk(KERN_NOTICE "Add device[%d]: osd_name-%s\n",
-		       i, odi.osdname);
-
-		/* the exofs id is currently the table index */
-		eds[i].did = i;
-
-		/* On all devices the device table is identical. The user can
-		 * specify any one of the participating devices on the command
-		 * line. We always keep them in device-table order.
-		 */
-		if (fscb_od && osduld_device_same(fscb_od, &odi)) {
-			eds[i].ored.od = fscb_od;
-			++sbi->oc.numdevs;
-			fscb_od = NULL;
-			exofs_sysfs_odev_add(&eds[i], sbi);
-			continue;
-		}
-
-		od = osduld_info_lookup(&odi);
-		if (IS_ERR(od)) {
-			ret = PTR_ERR(od);
-			EXOFS_ERR("ERROR: device requested is not found "
-				  "osd_name-%s =>%d\n", odi.osdname, ret);
-			goto out;
-		}
-
-		eds[i].ored.od = od;
-		++sbi->oc.numdevs;
-
-		/* Read the fscb of the other devices to make sure the FS
-		 * partition is there.
-		 */
-		ret = exofs_read_kern(od, comp.cred, &comp.obj, 0, &fscb,
-				      sizeof(fscb));
-		if (unlikely(ret)) {
-			EXOFS_ERR("ERROR: Malformed participating device "
-				  "error reading fscb osd_name-%s\n",
-				  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
-		 *	 generation and old devices?
-		 */
-	}
-
-out:
-	kfree(dt);
-	if (unlikely(fscb_od && !ret)) {
-			EXOFS_ERR("ERROR: Bad device-table container device not present\n");
-			osduld_put_device(fscb_od);
-			return -EINVAL;
-	}
-	return ret;
-}
-
-/*
- * Read the superblock from the OSD and fill in the fields
- */
-static int exofs_fill_super(struct super_block *sb,
-				struct exofs_mountopt *opts,
-				struct exofs_sb_info *sbi,
-				int silent)
-{
-	struct inode *root;
-	struct osd_dev *od;		/* Master device                 */
-	struct exofs_fscb fscb;		/*on-disk superblock info        */
-	struct ore_comp comp;
-	unsigned table_count;
-	int ret;
-
-	/* use mount options to fill superblock */
-	if (opts->is_osdname) {
-		struct osd_dev_info odi = {.systemid_len = 0};
-
-		odi.osdname_len = strlen(opts->dev_name);
-		odi.osdname = (u8 *)opts->dev_name;
-		od = osduld_info_lookup(&odi);
-		kfree(opts->dev_name);
-		opts->dev_name = NULL;
-	} else {
-		od = osduld_path_lookup(opts->dev_name);
-	}
-	if (IS_ERR(od)) {
-		ret = -EINVAL;
-		goto free_sbi;
-	}
-
-	/* Default layout in case we do not have a device-table */
-	sbi->layout.stripe_unit = PAGE_SIZE;
-	sbi->layout.mirrors_p1 = 1;
-	sbi->layout.group_width = 1;
-	sbi->layout.group_depth = -1;
-	sbi->layout.group_count = 1;
-	sbi->s_timeout = opts->timeout;
-
-	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.single_comp = EC_SINGLE_COMP;
-	sbi->oc.comps = &sbi->one_comp;
-
-	/* fill in some other data by hand */
-	memset(sb->s_id, 0, sizeof(sb->s_id));
-	strcpy(sb->s_id, "exofs");
-	sb->s_blocksize = EXOFS_BLKSIZE;
-	sb->s_blocksize_bits = EXOFS_BLKSHIFT;
-	sb->s_maxbytes = MAX_LFS_FILESIZE;
-	sb->s_max_links = EXOFS_LINK_MAX;
-	atomic_set(&sbi->s_curr_pending, 0);
-	sb->s_bdev = NULL;
-	sb->s_dev = 0;
-
-	comp.obj.partition = sbi->one_comp.obj.partition;
-	comp.obj.id = EXOFS_SUPER_ID;
-	exofs_make_credential(comp.cred, &comp.obj);
-
-	ret = exofs_read_kern(od, comp.cred, &comp.obj, 0, &fscb, sizeof(fscb));
-	if (unlikely(ret))
-		goto free_sbi;
-
-	sb->s_magic = le16_to_cpu(fscb.s_magic);
-	/* NOTE: we read below to be backward compatible with old versions */
-	sbi->s_nextid = le64_to_cpu(fscb.s_nextid);
-	sbi->s_numfiles = le32_to_cpu(fscb.s_numfiles);
-
-	/* make sure what we read from the object store is correct */
-	if (sb->s_magic != EXOFS_SUPER_MAGIC) {
-		if (!silent)
-			EXOFS_ERR("ERROR: Bad magic value\n");
-		ret = -EINVAL;
-		goto free_sbi;
-	}
-	if (le32_to_cpu(fscb.s_version) > EXOFS_FSCB_VER) {
-		EXOFS_ERR("ERROR: Bad FSCB version expected-%d got-%d\n",
-			  EXOFS_FSCB_VER, le32_to_cpu(fscb.s_version));
-		ret = -EINVAL;
-		goto free_sbi;
-	}
-
-	/* start generation numbers from a random point */
-	get_random_bytes(&sbi->s_next_generation, sizeof(u32));
-	spin_lock_init(&sbi->s_next_gen_lock);
-
-	table_count = le64_to_cpu(fscb.s_dev_table_count);
-	if (table_count) {
-		ret = exofs_read_lookup_dev_table(sbi, od, table_count);
-		if (unlikely(ret))
-			goto free_sbi;
-	} else {
-		struct exofs_dev *eds;
-
-		ret = __alloc_dev_table(sbi, 1, &eds);
-		if (unlikely(ret))
-			goto free_sbi;
-
-		ore_comp_set_dev(&sbi->oc, 0, od);
-		sbi->oc.numdevs = 1;
-	}
-
-	__sbi_read_stats(sbi);
-
-	/* set up operation vectors */
-	ret = super_setup_bdi(sb);
-	if (ret) {
-		EXOFS_DBGMSG("Failed to super_setup_bdi\n");
-		goto free_sbi;
-	}
-	sb->s_bdi->ra_pages = __ra_pages(&sbi->layout);
-	sb->s_fs_info = sbi;
-	sb->s_op = &exofs_sops;
-	sb->s_export_op = &exofs_export_ops;
-	root = exofs_iget(sb, EXOFS_ROOT_ID - EXOFS_OBJ_OFF);
-	if (IS_ERR(root)) {
-		EXOFS_ERR("ERROR: exofs_iget failed\n");
-		ret = PTR_ERR(root);
-		goto free_sbi;
-	}
-	sb->s_root = d_make_root(root);
-	if (!sb->s_root) {
-		EXOFS_ERR("ERROR: get root inode failed\n");
-		ret = -ENOMEM;
-		goto free_sbi;
-	}
-
-	if (!S_ISDIR(root->i_mode)) {
-		dput(sb->s_root);
-		sb->s_root = NULL;
-		EXOFS_ERR("ERROR: corrupt root inode (mode = %hd)\n",
-		       root->i_mode);
-		ret = -EINVAL;
-		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);
-	return 0;
-
-free_sbi:
-	EXOFS_ERR("Unable to mount exofs on %s pid=0x%llx err=%d\n",
-		  opts->dev_name, sbi->one_comp.obj.partition, ret);
-	exofs_free_sbi(sbi);
-	return ret;
-}
-
-/*
- * Set up the superblock (calls exofs_fill_super eventually)
- */
-static struct dentry *exofs_mount(struct file_system_type *type,
-			  int flags, const char *dev_name,
-			  void *data)
-{
-	struct super_block *s;
-	struct exofs_mountopt opts;
-	struct exofs_sb_info *sbi;
-	int ret;
-
-	ret = parse_options(data, &opts);
-	if (ret) {
-		kfree(opts.dev_name);
-		return ERR_PTR(ret);
-	}
-
-	sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
-	if (!sbi) {
-		kfree(opts.dev_name);
-		return ERR_PTR(-ENOMEM);
-	}
-
-	s = sget(type, NULL, set_anon_super, flags, NULL);
-
-	if (IS_ERR(s)) {
-		kfree(opts.dev_name);
-		kfree(sbi);
-		return ERR_CAST(s);
-	}
-
-	if (!opts.dev_name)
-		opts.dev_name = dev_name;
-
-
-	ret = exofs_fill_super(s, &opts, sbi, flags & SB_SILENT ? 1 : 0);
-	if (ret) {
-		deactivate_locked_super(s);
-		return ERR_PTR(ret);
-	}
-	s->s_flags |= SB_ACTIVE;
-	return dget(s->s_root);
-}
-
-/*
- * Return information about the file system state in the buffer.  This is used
- * by the 'df' command, for example.
- */
-static int exofs_statfs(struct dentry *dentry, struct kstatfs *buf)
-{
-	struct super_block *sb = dentry->d_sb;
-	struct exofs_sb_info *sbi = sb->s_fs_info;
-	struct ore_io_state *ios;
-	struct osd_attr attrs[] = {
-		ATTR_DEF(OSD_APAGE_PARTITION_QUOTAS,
-			OSD_ATTR_PQ_CAPACITY_QUOTA, sizeof(__be64)),
-		ATTR_DEF(OSD_APAGE_PARTITION_INFORMATION,
-			OSD_ATTR_PI_USED_CAPACITY, sizeof(__be64)),
-	};
-	uint64_t capacity = ULLONG_MAX;
-	uint64_t used = ULLONG_MAX;
-	int ret;
-
-	ret = ore_get_io_state(&sbi->layout, &sbi->oc, &ios);
-	if (ret) {
-		EXOFS_DBGMSG("ore_get_io_state failed.\n");
-		return ret;
-	}
-
-	ios->in_attr = attrs;
-	ios->in_attr_len = ARRAY_SIZE(attrs);
-
-	ret = ore_read(ios);
-	if (unlikely(ret))
-		goto out;
-
-	ret = extract_attr_from_ios(ios, &attrs[0]);
-	if (likely(!ret)) {
-		capacity = get_unaligned_be64(attrs[0].val_ptr);
-		if (unlikely(!capacity))
-			capacity = ULLONG_MAX;
-	} else
-		EXOFS_DBGMSG("exofs_statfs: get capacity failed.\n");
-
-	ret = extract_attr_from_ios(ios, &attrs[1]);
-	if (likely(!ret))
-		used = get_unaligned_be64(attrs[1].val_ptr);
-	else
-		EXOFS_DBGMSG("exofs_statfs: get used-space failed.\n");
-
-	/* fill in the stats buffer */
-	buf->f_type = EXOFS_SUPER_MAGIC;
-	buf->f_bsize = EXOFS_BLKSIZE;
-	buf->f_blocks = capacity >> 9;
-	buf->f_bfree = (capacity - used) >> 9;
-	buf->f_bavail = buf->f_bfree;
-	buf->f_files = sbi->s_numfiles;
-	buf->f_ffree = EXOFS_MAX_ID - sbi->s_numfiles;
-	buf->f_namelen = EXOFS_NAME_LEN;
-
-out:
-	ore_put_io_state(ios);
-	return ret;
-}
-
-static const struct super_operations exofs_sops = {
-	.alloc_inode    = exofs_alloc_inode,
-	.destroy_inode  = exofs_destroy_inode,
-	.write_inode    = exofs_write_inode,
-	.evict_inode    = exofs_evict_inode,
-	.put_super      = exofs_put_super,
-	.sync_fs	= exofs_sync_fs,
-	.statfs         = exofs_statfs,
-};
-
-/******************************************************************************
- * EXPORT OPERATIONS
- *****************************************************************************/
-
-static struct dentry *exofs_get_parent(struct dentry *child)
-{
-	unsigned long ino = exofs_parent_ino(child);
-
-	if (!ino)
-		return ERR_PTR(-ESTALE);
-
-	return d_obtain_alias(exofs_iget(child->d_sb, ino));
-}
-
-static struct inode *exofs_nfs_get_inode(struct super_block *sb,
-		u64 ino, u32 generation)
-{
-	struct inode *inode;
-
-	inode = exofs_iget(sb, ino);
-	if (IS_ERR(inode))
-		return ERR_CAST(inode);
-	if (generation && inode->i_generation != generation) {
-		/* we didn't find the right inode.. */
-		iput(inode);
-		return ERR_PTR(-ESTALE);
-	}
-	return inode;
-}
-
-static struct dentry *exofs_fh_to_dentry(struct super_block *sb,
-				struct fid *fid, int fh_len, int fh_type)
-{
-	return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
-				    exofs_nfs_get_inode);
-}
-
-static struct dentry *exofs_fh_to_parent(struct super_block *sb,
-				struct fid *fid, int fh_len, int fh_type)
-{
-	return generic_fh_to_parent(sb, fid, fh_len, fh_type,
-				    exofs_nfs_get_inode);
-}
-
-static const struct export_operations exofs_export_ops = {
-	.fh_to_dentry = exofs_fh_to_dentry,
-	.fh_to_parent = exofs_fh_to_parent,
-	.get_parent = exofs_get_parent,
-};
-
-/******************************************************************************
- * INSMOD/RMMOD
- *****************************************************************************/
-
-/*
- * struct that describes this file system
- */
-static struct file_system_type exofs_type = {
-	.owner          = THIS_MODULE,
-	.name           = "exofs",
-	.mount          = exofs_mount,
-	.kill_sb        = generic_shutdown_super,
-};
-MODULE_ALIAS_FS("exofs");
-
-static int __init init_exofs(void)
-{
-	int err;
-
-	err = init_inodecache();
-	if (err)
-		goto out;
-
-	err = register_filesystem(&exofs_type);
-	if (err)
-		goto out_d;
-
-	/* We don't fail if sysfs creation failed */
-	exofs_sysfs_init();
-
-	return 0;
-out_d:
-	destroy_inodecache();
-out:
-	return err;
-}
-
-static void __exit exit_exofs(void)
-{
-	exofs_sysfs_uninit();
-	unregister_filesystem(&exofs_type);
-	destroy_inodecache();
-}
-
-MODULE_AUTHOR("Avishay Traeger <avishay@gmail.com>");
-MODULE_DESCRIPTION("exofs");
-MODULE_LICENSE("GPL");
-
-module_init(init_exofs)
-module_exit(exit_exofs)