Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 0 insertions, 972 deletions

diff --git a/ANDROID_3.4.5/fs/ceph/super.c b/ANDROID_3.4.5/fs/ceph/super.c
deleted file mode 100644
index 1e67dd73..00000000
--- a/ANDROID_3.4.5/fs/ceph/super.c
+++ /dev/null
@@ -1,972 +0,0 @@
-
-#include <linux/ceph/ceph_debug.h>
-
-#include <linux/backing-dev.h>
-#include <linux/ctype.h>
-#include <linux/fs.h>
-#include <linux/inet.h>
-#include <linux/in6.h>
-#include <linux/module.h>
-#include <linux/mount.h>
-#include <linux/parser.h>
-#include <linux/sched.h>
-#include <linux/seq_file.h>
-#include <linux/slab.h>
-#include <linux/statfs.h>
-#include <linux/string.h>
-
-#include "super.h"
-#include "mds_client.h"
-
-#include <linux/ceph/decode.h>
-#include <linux/ceph/mon_client.h>
-#include <linux/ceph/auth.h>
-#include <linux/ceph/debugfs.h>
-
-/*
- * Ceph superblock operations
- *
- * Handle the basics of mounting, unmounting.
- */
-
-/*
- * super ops
- */
-static void ceph_put_super(struct super_block *s)
-{
-	struct ceph_fs_client *fsc = ceph_sb_to_client(s);
-
-	dout("put_super\n");
-	ceph_mdsc_close_sessions(fsc->mdsc);
-
-	/*
-	 * ensure we release the bdi before put_anon_super releases
-	 * the device name.
-	 */
-	if (s->s_bdi == &fsc->backing_dev_info) {
-		bdi_unregister(&fsc->backing_dev_info);
-		s->s_bdi = NULL;
-	}
-
-	return;
-}
-
-static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf)
-{
-	struct ceph_fs_client *fsc = ceph_inode_to_client(dentry->d_inode);
-	struct ceph_monmap *monmap = fsc->client->monc.monmap;
-	struct ceph_statfs st;
-	u64 fsid;
-	int err;
-
-	dout("statfs\n");
-	err = ceph_monc_do_statfs(&fsc->client->monc, &st);
-	if (err < 0)
-		return err;
-
-	/* fill in kstatfs */
-	buf->f_type = CEPH_SUPER_MAGIC;  /* ?? */
-
-	/*
-	 * express utilization in terms of large blocks to avoid
-	 * overflow on 32-bit machines.
-	 */
-	buf->f_bsize = 1 << CEPH_BLOCK_SHIFT;
-	buf->f_blocks = le64_to_cpu(st.kb) >> (CEPH_BLOCK_SHIFT-10);
-	buf->f_bfree = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10);
-	buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10);
-
-	buf->f_files = le64_to_cpu(st.num_objects);
-	buf->f_ffree = -1;
-	buf->f_namelen = NAME_MAX;
-	buf->f_frsize = PAGE_CACHE_SIZE;
-
-	/* leave fsid little-endian, regardless of host endianness */
-	fsid = *(u64 *)(&monmap->fsid) ^ *((u64 *)&monmap->fsid + 1);
-	buf->f_fsid.val[0] = fsid & 0xffffffff;
-	buf->f_fsid.val[1] = fsid >> 32;
-
-	return 0;
-}
-
-
-static int ceph_sync_fs(struct super_block *sb, int wait)
-{
-	struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
-
-	if (!wait) {
-		dout("sync_fs (non-blocking)\n");
-		ceph_flush_dirty_caps(fsc->mdsc);
-		dout("sync_fs (non-blocking) done\n");
-		return 0;
-	}
-
-	dout("sync_fs (blocking)\n");
-	ceph_osdc_sync(&fsc->client->osdc);
-	ceph_mdsc_sync(fsc->mdsc);
-	dout("sync_fs (blocking) done\n");
-	return 0;
-}
-
-/*
- * mount options
- */
-enum {
-	Opt_wsize,
-	Opt_rsize,
-	Opt_rasize,
-	Opt_caps_wanted_delay_min,
-	Opt_caps_wanted_delay_max,
-	Opt_cap_release_safety,
-	Opt_readdir_max_entries,
-	Opt_readdir_max_bytes,
-	Opt_congestion_kb,
-	Opt_last_int,
-	/* int args above */
-	Opt_snapdirname,
-	Opt_last_string,
-	/* string args above */
-	Opt_dirstat,
-	Opt_nodirstat,
-	Opt_rbytes,
-	Opt_norbytes,
-	Opt_asyncreaddir,
-	Opt_noasyncreaddir,
-	Opt_dcache,
-	Opt_nodcache,
-	Opt_ino32,
-	Opt_noino32,
-};
-
-static match_table_t fsopt_tokens = {
-	{Opt_wsize, "wsize=%d"},
-	{Opt_rsize, "rsize=%d"},
-	{Opt_rasize, "rasize=%d"},
-	{Opt_caps_wanted_delay_min, "caps_wanted_delay_min=%d"},
-	{Opt_caps_wanted_delay_max, "caps_wanted_delay_max=%d"},
-	{Opt_cap_release_safety, "cap_release_safety=%d"},
-	{Opt_readdir_max_entries, "readdir_max_entries=%d"},
-	{Opt_readdir_max_bytes, "readdir_max_bytes=%d"},
-	{Opt_congestion_kb, "write_congestion_kb=%d"},
-	/* int args above */
-	{Opt_snapdirname, "snapdirname=%s"},
-	/* string args above */
-	{Opt_dirstat, "dirstat"},
-	{Opt_nodirstat, "nodirstat"},
-	{Opt_rbytes, "rbytes"},
-	{Opt_norbytes, "norbytes"},
-	{Opt_asyncreaddir, "asyncreaddir"},
-	{Opt_noasyncreaddir, "noasyncreaddir"},
-	{Opt_dcache, "dcache"},
-	{Opt_nodcache, "nodcache"},
-	{Opt_ino32, "ino32"},
-	{Opt_noino32, "noino32"},
-	{-1, NULL}
-};
-
-static int parse_fsopt_token(char *c, void *private)
-{
-	struct ceph_mount_options *fsopt = private;
-	substring_t argstr[MAX_OPT_ARGS];
-	int token, intval, ret;
-
-	token = match_token((char *)c, fsopt_tokens, argstr);
-	if (token < 0)
-		return -EINVAL;
-
-	if (token < Opt_last_int) {
-		ret = match_int(&argstr[0], &intval);
-		if (ret < 0) {
-			pr_err("bad mount option arg (not int) "
-			       "at '%s'\n", c);
-			return ret;
-		}
-		dout("got int token %d val %d\n", token, intval);
-	} else if (token > Opt_last_int && token < Opt_last_string) {
-		dout("got string token %d val %s\n", token,
-		     argstr[0].from);
-	} else {
-		dout("got token %d\n", token);
-	}
-
-	switch (token) {
-	case Opt_snapdirname:
-		kfree(fsopt->snapdir_name);
-		fsopt->snapdir_name = kstrndup(argstr[0].from,
-					       argstr[0].to-argstr[0].from,
-					       GFP_KERNEL);
-		if (!fsopt->snapdir_name)
-			return -ENOMEM;
-		break;
-
-		/* misc */
-	case Opt_wsize:
-		fsopt->wsize = intval;
-		break;
-	case Opt_rsize:
-		fsopt->rsize = intval;
-		break;
-	case Opt_rasize:
-		fsopt->rasize = intval;
-		break;
-	case Opt_caps_wanted_delay_min:
-		fsopt->caps_wanted_delay_min = intval;
-		break;
-	case Opt_caps_wanted_delay_max:
-		fsopt->caps_wanted_delay_max = intval;
-		break;
-	case Opt_readdir_max_entries:
-		fsopt->max_readdir = intval;
-		break;
-	case Opt_readdir_max_bytes:
-		fsopt->max_readdir_bytes = intval;
-		break;
-	case Opt_congestion_kb:
-		fsopt->congestion_kb = intval;
-		break;
-	case Opt_dirstat:
-		fsopt->flags |= CEPH_MOUNT_OPT_DIRSTAT;
-		break;
-	case Opt_nodirstat:
-		fsopt->flags &= ~CEPH_MOUNT_OPT_DIRSTAT;
-		break;
-	case Opt_rbytes:
-		fsopt->flags |= CEPH_MOUNT_OPT_RBYTES;
-		break;
-	case Opt_norbytes:
-		fsopt->flags &= ~CEPH_MOUNT_OPT_RBYTES;
-		break;
-	case Opt_asyncreaddir:
-		fsopt->flags &= ~CEPH_MOUNT_OPT_NOASYNCREADDIR;
-		break;
-	case Opt_noasyncreaddir:
-		fsopt->flags |= CEPH_MOUNT_OPT_NOASYNCREADDIR;
-		break;
-	case Opt_dcache:
-		fsopt->flags |= CEPH_MOUNT_OPT_DCACHE;
-		break;
-	case Opt_nodcache:
-		fsopt->flags &= ~CEPH_MOUNT_OPT_DCACHE;
-		break;
-	case Opt_ino32:
-		fsopt->flags |= CEPH_MOUNT_OPT_INO32;
-		break;
-	case Opt_noino32:
-		fsopt->flags &= ~CEPH_MOUNT_OPT_INO32;
-		break;
-	default:
-		BUG_ON(token);
-	}
-	return 0;
-}
-
-static void destroy_mount_options(struct ceph_mount_options *args)
-{
-	dout("destroy_mount_options %p\n", args);
-	kfree(args->snapdir_name);
-	kfree(args);
-}
-
-static int strcmp_null(const char *s1, const char *s2)
-{
-	if (!s1 && !s2)
-		return 0;
-	if (s1 && !s2)
-		return -1;
-	if (!s1 && s2)
-		return 1;
-	return strcmp(s1, s2);
-}
-
-static int compare_mount_options(struct ceph_mount_options *new_fsopt,
-				 struct ceph_options *new_opt,
-				 struct ceph_fs_client *fsc)
-{
-	struct ceph_mount_options *fsopt1 = new_fsopt;
-	struct ceph_mount_options *fsopt2 = fsc->mount_options;
-	int ofs = offsetof(struct ceph_mount_options, snapdir_name);
-	int ret;
-
-	ret = memcmp(fsopt1, fsopt2, ofs);
-	if (ret)
-		return ret;
-
-	ret = strcmp_null(fsopt1->snapdir_name, fsopt2->snapdir_name);
-	if (ret)
-		return ret;
-
-	return ceph_compare_options(new_opt, fsc->client);
-}
-
-static int parse_mount_options(struct ceph_mount_options **pfsopt,
-			       struct ceph_options **popt,
-			       int flags, char *options,
-			       const char *dev_name,
-			       const char **path)
-{
-	struct ceph_mount_options *fsopt;
-	const char *dev_name_end;
-	int err = -ENOMEM;
-
-	fsopt = kzalloc(sizeof(*fsopt), GFP_KERNEL);
-	if (!fsopt)
-		return -ENOMEM;
-
-	dout("parse_mount_options %p, dev_name '%s'\n", fsopt, dev_name);
-
-	fsopt->sb_flags = flags;
-	fsopt->flags = CEPH_MOUNT_OPT_DEFAULT;
-
-	fsopt->rsize = CEPH_RSIZE_DEFAULT;
-	fsopt->rasize = CEPH_RASIZE_DEFAULT;
-	fsopt->snapdir_name = kstrdup(CEPH_SNAPDIRNAME_DEFAULT, GFP_KERNEL);
-	fsopt->caps_wanted_delay_min = CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT;
-	fsopt->caps_wanted_delay_max = CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT;
-	fsopt->cap_release_safety = CEPH_CAP_RELEASE_SAFETY_DEFAULT;
-	fsopt->max_readdir = CEPH_MAX_READDIR_DEFAULT;
-	fsopt->max_readdir_bytes = CEPH_MAX_READDIR_BYTES_DEFAULT;
-	fsopt->congestion_kb = default_congestion_kb();
-
-	/* ip1[:port1][,ip2[:port2]...]:/subdir/in/fs */
-	err = -EINVAL;
-	if (!dev_name)
-		goto out;
-	*path = strstr(dev_name, ":/");
-	if (*path == NULL) {
-		pr_err("device name is missing path (no :/ in %s)\n",
-				dev_name);
-		goto out;
-	}
-	dev_name_end = *path;
-	dout("device name '%.*s'\n", (int)(dev_name_end - dev_name), dev_name);
-
-	/* path on server */
-	*path += 2;
-	dout("server path '%s'\n", *path);
-
-	*popt = ceph_parse_options(options, dev_name, dev_name_end,
-				 parse_fsopt_token, (void *)fsopt);
-	if (IS_ERR(*popt)) {
-		err = PTR_ERR(*popt);
-		goto out;
-	}
-
-	/* success */
-	*pfsopt = fsopt;
-	return 0;
-
-out:
-	destroy_mount_options(fsopt);
-	return err;
-}
-
-/**
- * ceph_show_options - Show mount options in /proc/mounts
- * @m: seq_file to write to
- * @root: root of that (sub)tree
- */
-static int ceph_show_options(struct seq_file *m, struct dentry *root)
-{
-	struct ceph_fs_client *fsc = ceph_sb_to_client(root->d_sb);
-	struct ceph_mount_options *fsopt = fsc->mount_options;
-	struct ceph_options *opt = fsc->client->options;
-
-	if (opt->flags & CEPH_OPT_FSID)
-		seq_printf(m, ",fsid=%pU", &opt->fsid);
-	if (opt->flags & CEPH_OPT_NOSHARE)
-		seq_puts(m, ",noshare");
-	if (opt->flags & CEPH_OPT_NOCRC)
-		seq_puts(m, ",nocrc");
-
-	if (opt->name)
-		seq_printf(m, ",name=%s", opt->name);
-	if (opt->key)
-		seq_puts(m, ",secret=<hidden>");
-
-	if (opt->mount_timeout != CEPH_MOUNT_TIMEOUT_DEFAULT)
-		seq_printf(m, ",mount_timeout=%d", opt->mount_timeout);
-	if (opt->osd_idle_ttl != CEPH_OSD_IDLE_TTL_DEFAULT)
-		seq_printf(m, ",osd_idle_ttl=%d", opt->osd_idle_ttl);
-	if (opt->osd_timeout != CEPH_OSD_TIMEOUT_DEFAULT)
-		seq_printf(m, ",osdtimeout=%d", opt->osd_timeout);
-	if (opt->osd_keepalive_timeout != CEPH_OSD_KEEPALIVE_DEFAULT)
-		seq_printf(m, ",osdkeepalivetimeout=%d",
-			   opt->osd_keepalive_timeout);
-
-	if (fsopt->flags & CEPH_MOUNT_OPT_DIRSTAT)
-		seq_puts(m, ",dirstat");
-	if ((fsopt->flags & CEPH_MOUNT_OPT_RBYTES) == 0)
-		seq_puts(m, ",norbytes");
-	if (fsopt->flags & CEPH_MOUNT_OPT_NOASYNCREADDIR)
-		seq_puts(m, ",noasyncreaddir");
-	if (fsopt->flags & CEPH_MOUNT_OPT_DCACHE)
-		seq_puts(m, ",dcache");
-	else
-		seq_puts(m, ",nodcache");
-
-	if (fsopt->wsize)
-		seq_printf(m, ",wsize=%d", fsopt->wsize);
-	if (fsopt->rsize != CEPH_RSIZE_DEFAULT)
-		seq_printf(m, ",rsize=%d", fsopt->rsize);
-	if (fsopt->rasize != CEPH_RASIZE_DEFAULT)
-		seq_printf(m, ",rasize=%d", fsopt->rasize);
-	if (fsopt->congestion_kb != default_congestion_kb())
-		seq_printf(m, ",write_congestion_kb=%d", fsopt->congestion_kb);
-	if (fsopt->caps_wanted_delay_min != CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT)
-		seq_printf(m, ",caps_wanted_delay_min=%d",
-			 fsopt->caps_wanted_delay_min);
-	if (fsopt->caps_wanted_delay_max != CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT)
-		seq_printf(m, ",caps_wanted_delay_max=%d",
-			   fsopt->caps_wanted_delay_max);
-	if (fsopt->cap_release_safety != CEPH_CAP_RELEASE_SAFETY_DEFAULT)
-		seq_printf(m, ",cap_release_safety=%d",
-			   fsopt->cap_release_safety);
-	if (fsopt->max_readdir != CEPH_MAX_READDIR_DEFAULT)
-		seq_printf(m, ",readdir_max_entries=%d", fsopt->max_readdir);
-	if (fsopt->max_readdir_bytes != CEPH_MAX_READDIR_BYTES_DEFAULT)
-		seq_printf(m, ",readdir_max_bytes=%d", fsopt->max_readdir_bytes);
-	if (strcmp(fsopt->snapdir_name, CEPH_SNAPDIRNAME_DEFAULT))
-		seq_printf(m, ",snapdirname=%s", fsopt->snapdir_name);
-	return 0;
-}
-
-/*
- * handle any mon messages the standard library doesn't understand.
- * return error if we don't either.
- */
-static int extra_mon_dispatch(struct ceph_client *client, struct ceph_msg *msg)
-{
-	struct ceph_fs_client *fsc = client->private;
-	int type = le16_to_cpu(msg->hdr.type);
-
-	switch (type) {
-	case CEPH_MSG_MDS_MAP:
-		ceph_mdsc_handle_map(fsc->mdsc, msg);
-		return 0;
-
-	default:
-		return -1;
-	}
-}
-
-/*
- * create a new fs client
- */
-static struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt,
-					struct ceph_options *opt)
-{
-	struct ceph_fs_client *fsc;
-	const unsigned supported_features =
-		CEPH_FEATURE_FLOCK |
-		CEPH_FEATURE_DIRLAYOUTHASH;
-	const unsigned required_features = 0;
-	int err = -ENOMEM;
-
-	fsc = kzalloc(sizeof(*fsc), GFP_KERNEL);
-	if (!fsc)
-		return ERR_PTR(-ENOMEM);
-
-	fsc->client = ceph_create_client(opt, fsc, supported_features,
-					 required_features);
-	if (IS_ERR(fsc->client)) {
-		err = PTR_ERR(fsc->client);
-		goto fail;
-	}
-	fsc->client->extra_mon_dispatch = extra_mon_dispatch;
-	fsc->client->monc.want_mdsmap = 1;
-
-	fsc->mount_options = fsopt;
-
-	fsc->sb = NULL;
-	fsc->mount_state = CEPH_MOUNT_MOUNTING;
-
-	atomic_long_set(&fsc->writeback_count, 0);
-
-	err = bdi_init(&fsc->backing_dev_info);
-	if (err < 0)
-		goto fail_client;
-
-	err = -ENOMEM;
-	/*
-	 * The number of concurrent works can be high but they don't need
-	 * to be processed in parallel, limit concurrency.
-	 */
-	fsc->wb_wq = alloc_workqueue("ceph-writeback", 0, 1);
-	if (fsc->wb_wq == NULL)
-		goto fail_bdi;
-	fsc->pg_inv_wq = alloc_workqueue("ceph-pg-invalid", 0, 1);
-	if (fsc->pg_inv_wq == NULL)
-		goto fail_wb_wq;
-	fsc->trunc_wq = alloc_workqueue("ceph-trunc", 0, 1);
-	if (fsc->trunc_wq == NULL)
-		goto fail_pg_inv_wq;
-
-	/* set up mempools */
-	err = -ENOMEM;
-	fsc->wb_pagevec_pool = mempool_create_kmalloc_pool(10,
-			      fsc->mount_options->wsize >> PAGE_CACHE_SHIFT);
-	if (!fsc->wb_pagevec_pool)
-		goto fail_trunc_wq;
-
-	/* caps */
-	fsc->min_caps = fsopt->max_readdir;
-
-	return fsc;
-
-fail_trunc_wq:
-	destroy_workqueue(fsc->trunc_wq);
-fail_pg_inv_wq:
-	destroy_workqueue(fsc->pg_inv_wq);
-fail_wb_wq:
-	destroy_workqueue(fsc->wb_wq);
-fail_bdi:
-	bdi_destroy(&fsc->backing_dev_info);
-fail_client:
-	ceph_destroy_client(fsc->client);
-fail:
-	kfree(fsc);
-	return ERR_PTR(err);
-}
-
-static void destroy_fs_client(struct ceph_fs_client *fsc)
-{
-	dout("destroy_fs_client %p\n", fsc);
-
-	destroy_workqueue(fsc->wb_wq);
-	destroy_workqueue(fsc->pg_inv_wq);
-	destroy_workqueue(fsc->trunc_wq);
-
-	bdi_destroy(&fsc->backing_dev_info);
-
-	mempool_destroy(fsc->wb_pagevec_pool);
-
-	destroy_mount_options(fsc->mount_options);
-
-	ceph_fs_debugfs_cleanup(fsc);
-
-	ceph_destroy_client(fsc->client);
-
-	kfree(fsc);
-	dout("destroy_fs_client %p done\n", fsc);
-}
-
-/*
- * caches
- */
-struct kmem_cache *ceph_inode_cachep;
-struct kmem_cache *ceph_cap_cachep;
-struct kmem_cache *ceph_dentry_cachep;
-struct kmem_cache *ceph_file_cachep;
-
-static void ceph_inode_init_once(void *foo)
-{
-	struct ceph_inode_info *ci = foo;
-	inode_init_once(&ci->vfs_inode);
-}
-
-static int __init init_caches(void)
-{
-	ceph_inode_cachep = kmem_cache_create("ceph_inode_info",
-				      sizeof(struct ceph_inode_info),
-				      __alignof__(struct ceph_inode_info),
-				      (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
-				      ceph_inode_init_once);
-	if (ceph_inode_cachep == NULL)
-		return -ENOMEM;
-
-	ceph_cap_cachep = KMEM_CACHE(ceph_cap,
-				     SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD);
-	if (ceph_cap_cachep == NULL)
-		goto bad_cap;
-
-	ceph_dentry_cachep = KMEM_CACHE(ceph_dentry_info,
-					SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD);
-	if (ceph_dentry_cachep == NULL)
-		goto bad_dentry;
-
-	ceph_file_cachep = KMEM_CACHE(ceph_file_info,
-				      SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD);
-	if (ceph_file_cachep == NULL)
-		goto bad_file;
-
-	return 0;
-
-bad_file:
-	kmem_cache_destroy(ceph_dentry_cachep);
-bad_dentry:
-	kmem_cache_destroy(ceph_cap_cachep);
-bad_cap:
-	kmem_cache_destroy(ceph_inode_cachep);
-	return -ENOMEM;
-}
-
-static void destroy_caches(void)
-{
-	kmem_cache_destroy(ceph_inode_cachep);
-	kmem_cache_destroy(ceph_cap_cachep);
-	kmem_cache_destroy(ceph_dentry_cachep);
-	kmem_cache_destroy(ceph_file_cachep);
-}
-
-
-/*
- * ceph_umount_begin - initiate forced umount.  Tear down down the
- * mount, skipping steps that may hang while waiting for server(s).
- */
-static void ceph_umount_begin(struct super_block *sb)
-{
-	struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
-
-	dout("ceph_umount_begin - starting forced umount\n");
-	if (!fsc)
-		return;
-	fsc->mount_state = CEPH_MOUNT_SHUTDOWN;
-	return;
-}
-
-static const struct super_operations ceph_super_ops = {
-	.alloc_inode	= ceph_alloc_inode,
-	.destroy_inode	= ceph_destroy_inode,
-	.write_inode    = ceph_write_inode,
-	.sync_fs        = ceph_sync_fs,
-	.put_super	= ceph_put_super,
-	.show_options   = ceph_show_options,
-	.statfs		= ceph_statfs,
-	.umount_begin   = ceph_umount_begin,
-};
-
-/*
- * Bootstrap mount by opening the root directory.  Note the mount
- * @started time from caller, and time out if this takes too long.
- */
-static struct dentry *open_root_dentry(struct ceph_fs_client *fsc,
-				       const char *path,
-				       unsigned long started)
-{
-	struct ceph_mds_client *mdsc = fsc->mdsc;
-	struct ceph_mds_request *req = NULL;
-	int err;
-	struct dentry *root;
-
-	/* open dir */
-	dout("open_root_inode opening '%s'\n", path);
-	req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS);
-	if (IS_ERR(req))
-		return ERR_CAST(req);
-	req->r_path1 = kstrdup(path, GFP_NOFS);
-	req->r_ino1.ino = CEPH_INO_ROOT;
-	req->r_ino1.snap = CEPH_NOSNAP;
-	req->r_started = started;
-	req->r_timeout = fsc->client->options->mount_timeout * HZ;
-	req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INODE);
-	req->r_num_caps = 2;
-	err = ceph_mdsc_do_request(mdsc, NULL, req);
-	if (err == 0) {
-		struct inode *inode = req->r_target_inode;
-		req->r_target_inode = NULL;
-		dout("open_root_inode success\n");
-		if (ceph_ino(inode) == CEPH_INO_ROOT &&
-		    fsc->sb->s_root == NULL) {
-			root = d_make_root(inode);
-			if (!root) {
-				root = ERR_PTR(-ENOMEM);
-				goto out;
-			}
-		} else {
-			root = d_obtain_alias(inode);
-		}
-		ceph_init_dentry(root);
-		dout("open_root_inode success, root dentry is %p\n", root);
-	} else {
-		root = ERR_PTR(err);
-	}
-out:
-	ceph_mdsc_put_request(req);
-	return root;
-}
-
-
-
-
-/*
- * mount: join the ceph cluster, and open root directory.
- */
-static struct dentry *ceph_real_mount(struct ceph_fs_client *fsc,
-		      const char *path)
-{
-	int err;
-	unsigned long started = jiffies;  /* note the start time */
-	struct dentry *root;
-	int first = 0;   /* first vfsmount for this super_block */
-
-	dout("mount start\n");
-	mutex_lock(&fsc->client->mount_mutex);
-
-	err = __ceph_open_session(fsc->client, started);
-	if (err < 0)
-		goto out;
-
-	dout("mount opening root\n");
-	root = open_root_dentry(fsc, "", started);
-	if (IS_ERR(root)) {
-		err = PTR_ERR(root);
-		goto out;
-	}
-	if (fsc->sb->s_root) {
-		dput(root);
-	} else {
-		fsc->sb->s_root = root;
-		first = 1;
-
-		err = ceph_fs_debugfs_init(fsc);
-		if (err < 0)
-			goto fail;
-	}
-
-	if (path[0] == 0) {
-		dget(root);
-	} else {
-		dout("mount opening base mountpoint\n");
-		root = open_root_dentry(fsc, path, started);
-		if (IS_ERR(root)) {
-			err = PTR_ERR(root);
-			goto fail;
-		}
-	}
-
-	fsc->mount_state = CEPH_MOUNT_MOUNTED;
-	dout("mount success\n");
-	mutex_unlock(&fsc->client->mount_mutex);
-	return root;
-
-out:
-	mutex_unlock(&fsc->client->mount_mutex);
-	return ERR_PTR(err);
-
-fail:
-	if (first) {
-		dput(fsc->sb->s_root);
-		fsc->sb->s_root = NULL;
-	}
-	goto out;
-}
-
-static int ceph_set_super(struct super_block *s, void *data)
-{
-	struct ceph_fs_client *fsc = data;
-	int ret;
-
-	dout("set_super %p data %p\n", s, data);
-
-	s->s_flags = fsc->mount_options->sb_flags;
-	s->s_maxbytes = 1ULL << 40;  /* temp value until we get mdsmap */
-
-	s->s_fs_info = fsc;
-	fsc->sb = s;
-
-	s->s_op = &ceph_super_ops;
-	s->s_export_op = &ceph_export_ops;
-
-	s->s_time_gran = 1000;  /* 1000 ns == 1 us */
-
-	ret = set_anon_super(s, NULL);  /* what is that second arg for? */
-	if (ret != 0)
-		goto fail;
-
-	return ret;
-
-fail:
-	s->s_fs_info = NULL;
-	fsc->sb = NULL;
-	return ret;
-}
-
-/*
- * share superblock if same fs AND options
- */
-static int ceph_compare_super(struct super_block *sb, void *data)
-{
-	struct ceph_fs_client *new = data;
-	struct ceph_mount_options *fsopt = new->mount_options;
-	struct ceph_options *opt = new->client->options;
-	struct ceph_fs_client *other = ceph_sb_to_client(sb);
-
-	dout("ceph_compare_super %p\n", sb);
-
-	if (compare_mount_options(fsopt, opt, other)) {
-		dout("monitor(s)/mount options don't match\n");
-		return 0;
-	}
-	if ((opt->flags & CEPH_OPT_FSID) &&
-	    ceph_fsid_compare(&opt->fsid, &other->client->fsid)) {
-		dout("fsid doesn't match\n");
-		return 0;
-	}
-	if (fsopt->sb_flags != other->mount_options->sb_flags) {
-		dout("flags differ\n");
-		return 0;
-	}
-	return 1;
-}
-
-/*
- * construct our own bdi so we can control readahead, etc.
- */
-static atomic_long_t bdi_seq = ATOMIC_LONG_INIT(0);
-
-static int ceph_register_bdi(struct super_block *sb,
-			     struct ceph_fs_client *fsc)
-{
-	int err;
-
-	/* set ra_pages based on rasize mount option? */
-	if (fsc->mount_options->rasize >= PAGE_CACHE_SIZE)
-		fsc->backing_dev_info.ra_pages =
-			(fsc->mount_options->rasize + PAGE_CACHE_SIZE - 1)
-			>> PAGE_SHIFT;
-	else
-		fsc->backing_dev_info.ra_pages =
-			default_backing_dev_info.ra_pages;
-
-	err = bdi_register(&fsc->backing_dev_info, NULL, "ceph-%d",
-			   atomic_long_inc_return(&bdi_seq));
-	if (!err)
-		sb->s_bdi = &fsc->backing_dev_info;
-	return err;
-}
-
-static struct dentry *ceph_mount(struct file_system_type *fs_type,
-		       int flags, const char *dev_name, void *data)
-{
-	struct super_block *sb;
-	struct ceph_fs_client *fsc;
-	struct dentry *res;
-	int err;
-	int (*compare_super)(struct super_block *, void *) = ceph_compare_super;
-	const char *path = NULL;
-	struct ceph_mount_options *fsopt = NULL;
-	struct ceph_options *opt = NULL;
-
-	dout("ceph_mount\n");
-	err = parse_mount_options(&fsopt, &opt, flags, data, dev_name, &path);
-	if (err < 0) {
-		res = ERR_PTR(err);
-		goto out_final;
-	}
-
-	/* create client (which we may/may not use) */
-	fsc = create_fs_client(fsopt, opt);
-	if (IS_ERR(fsc)) {
-		res = ERR_CAST(fsc);
-		destroy_mount_options(fsopt);
-		ceph_destroy_options(opt);
-		goto out_final;
-	}
-
-	err = ceph_mdsc_init(fsc);
-	if (err < 0) {
-		res = ERR_PTR(err);
-		goto out;
-	}
-
-	if (ceph_test_opt(fsc->client, NOSHARE))
-		compare_super = NULL;
-	sb = sget(fs_type, compare_super, ceph_set_super, fsc);
-	if (IS_ERR(sb)) {
-		res = ERR_CAST(sb);
-		goto out;
-	}
-
-	if (ceph_sb_to_client(sb) != fsc) {
-		ceph_mdsc_destroy(fsc);
-		destroy_fs_client(fsc);
-		fsc = ceph_sb_to_client(sb);
-		dout("get_sb got existing client %p\n", fsc);
-	} else {
-		dout("get_sb using new client %p\n", fsc);
-		err = ceph_register_bdi(sb, fsc);
-		if (err < 0) {
-			res = ERR_PTR(err);
-			goto out_splat;
-		}
-	}
-
-	res = ceph_real_mount(fsc, path);
-	if (IS_ERR(res))
-		goto out_splat;
-	dout("root %p inode %p ino %llx.%llx\n", res,
-	     res->d_inode, ceph_vinop(res->d_inode));
-	return res;
-
-out_splat:
-	ceph_mdsc_close_sessions(fsc->mdsc);
-	deactivate_locked_super(sb);
-	goto out_final;
-
-out:
-	ceph_mdsc_destroy(fsc);
-	destroy_fs_client(fsc);
-out_final:
-	dout("ceph_mount fail %ld\n", PTR_ERR(res));
-	return res;
-}
-
-static void ceph_kill_sb(struct super_block *s)
-{
-	struct ceph_fs_client *fsc = ceph_sb_to_client(s);
-	dout("kill_sb %p\n", s);
-	ceph_mdsc_pre_umount(fsc->mdsc);
-	kill_anon_super(s);    /* will call put_super after sb is r/o */
-	ceph_mdsc_destroy(fsc);
-	destroy_fs_client(fsc);
-}
-
-static struct file_system_type ceph_fs_type = {
-	.owner		= THIS_MODULE,
-	.name		= "ceph",
-	.mount		= ceph_mount,
-	.kill_sb	= ceph_kill_sb,
-	.fs_flags	= FS_RENAME_DOES_D_MOVE,
-};
-
-#define _STRINGIFY(x) #x
-#define STRINGIFY(x) _STRINGIFY(x)
-
-static int __init init_ceph(void)
-{
-	int ret = init_caches();
-	if (ret)
-		goto out;
-
-	ceph_xattr_init();
-	ret = register_filesystem(&ceph_fs_type);
-	if (ret)
-		goto out_icache;
-
-	pr_info("loaded (mds proto %d)\n", CEPH_MDSC_PROTOCOL);
-
-	return 0;
-
-out_icache:
-	ceph_xattr_exit();
-	destroy_caches();
-out:
-	return ret;
-}
-
-static void __exit exit_ceph(void)
-{
-	dout("exit_ceph\n");
-	unregister_filesystem(&ceph_fs_type);
-	ceph_xattr_exit();
-	destroy_caches();
-}
-
-module_init(init_ceph);
-module_exit(exit_ceph);
-
-MODULE_AUTHOR("Sage Weil <sage@newdream.net>");
-MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>");
-MODULE_AUTHOR("Patience Warnick <patience@newdream.net>");
-MODULE_DESCRIPTION("Ceph filesystem for Linux");
-MODULE_LICENSE("GPL");