Creation of Cybook 2416 (actually Gen4) repository

fs/smbfs/Makefile

@@ -0,0 +1,38 @@
+#
+# Makefile for the linux smb-filesystem routines.
+#
+
+obj-$(CONFIG_SMB_FS) += smbfs.o
+
+smbfs-objs := proc.o dir.o cache.o sock.o inode.o file.o ioctl.o getopt.o \
+		symlink.o smbiod.o request.o
+
+# If you want debugging output, you may add these flags to the EXTRA_CFLAGS
+# SMBFS_PARANOIA should normally be enabled.
+
+EXTRA_CFLAGS += -DSMBFS_PARANOIA
+#EXTRA_CFLAGS += -DSMBFS_DEBUG
+#EXTRA_CFLAGS += -DSMBFS_DEBUG_VERBOSE
+#EXTRA_CFLAGS += -DDEBUG_SMB_TIMESTAMP
+#EXTRA_CFLAGS += -Werror
+
+#
+# Maintainer rules
+#
+
+# getopt.c not included. It is intentionally separate
+SRC = proc.c dir.c cache.c sock.c inode.c file.c ioctl.c smbiod.c request.c \
+	symlink.c
+
+proto:
+	-rm -f proto.h
+	@echo >  proto2.h "/*"
+	@echo >> proto2.h " *  Autogenerated with cproto on: " `date`
+	@echo >> proto2.h " */"
+	@echo >> proto2.h ""
+	@echo >> proto2.h "struct smb_request;"
+	@echo >> proto2.h "struct sock;"
+	@echo >> proto2.h "struct statfs;"
+	@echo >> proto2.h ""
+	cproto -E "gcc -E" -e -v -I $(TOPDIR)/include -DMAKING_PROTO -D__KERNEL__ $(SRC) >> proto2.h
+	mv proto2.h proto.h

fs/smbfs/cache.c

@@ -0,0 +1,209 @@
+/*
+ *  cache.c
+ *
+ * Copyright (C) 1997 by Bill Hawes
+ *
+ * Routines to support directory cacheing using the page cache.
+ * This cache code is almost directly taken from ncpfs.
+ *
+ * Please add a note about your changes to smbfs in the ChangeLog file.
+ */
+
+#include <linux/time.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/dirent.h>
+#include <linux/smb_fs.h>
+#include <linux/pagemap.h>
+#include <linux/net.h>
+
+#include <asm/page.h>
+
+#include "smb_debug.h"
+#include "proto.h"
+
+/*
+ * Force the next attempt to use the cache to be a timeout.
+ * If we can't find the page that's fine, it will cause a refresh.
+ */
+void
+smb_invalid_dir_cache(struct inode * dir)
+{
+	struct smb_sb_info *server = server_from_inode(dir);
+	union  smb_dir_cache *cache = NULL;
+	struct page *page = NULL;
+
+	page = grab_cache_page(&dir->i_data, 0);
+	if (!page)
+		goto out;
+
+	if (!PageUptodate(page))
+		goto out_unlock;
+
+	cache = kmap(page);
+	cache->head.time = jiffies - SMB_MAX_AGE(server);
+
+	kunmap(page);
+	SetPageUptodate(page);
+out_unlock:
+	unlock_page(page);
+	page_cache_release(page);
+out:
+	return;
+}
+
+/*
+ * Mark all dentries for 'parent' as invalid, forcing them to be re-read
+ */
+void
+smb_invalidate_dircache_entries(struct dentry *parent)
+{
+	struct smb_sb_info *server = server_from_dentry(parent);
+	struct list_head *next;
+	struct dentry *dentry;
+
+	spin_lock(&dcache_lock);
+	next = parent->d_subdirs.next;
+	while (next != &parent->d_subdirs) {
+		dentry = list_entry(next, struct dentry, d_u.d_child);
+		dentry->d_fsdata = NULL;
+		smb_age_dentry(server, dentry);
+		next = next->next;
+	}
+	spin_unlock(&dcache_lock);
+}
+
+/*
+ * dget, but require that fpos and parent matches what the dentry contains.
+ * dentry is not known to be a valid pointer at entry.
+ */
+struct dentry *
+smb_dget_fpos(struct dentry *dentry, struct dentry *parent, unsigned long fpos)
+{
+	struct dentry *dent = dentry;
+	struct list_head *next;
+
+	if (d_validate(dent, parent)) {
+		if (dent->d_name.len <= SMB_MAXNAMELEN &&
+		    (unsigned long)dent->d_fsdata == fpos) {
+			if (!dent->d_inode) {
+				dput(dent);
+				dent = NULL;
+			}
+			return dent;
+		}
+		dput(dent);
+	}
+
+	/* If a pointer is invalid, we search the dentry. */
+	spin_lock(&dcache_lock);
+	next = parent->d_subdirs.next;
+	while (next != &parent->d_subdirs) {
+		dent = list_entry(next, struct dentry, d_u.d_child);
+		if ((unsigned long)dent->d_fsdata == fpos) {
+			if (dent->d_inode)
+				dget_locked(dent);
+			else
+				dent = NULL;
+			goto out_unlock;
+		}
+		next = next->next;
+	}
+	dent = NULL;
+out_unlock:
+	spin_unlock(&dcache_lock);
+	return dent;
+}
+
+
+/*
+ * Create dentry/inode for this file and add it to the dircache.
+ */
+int
+smb_fill_cache(struct file *filp, void *dirent, filldir_t filldir,
+	       struct smb_cache_control *ctrl, struct qstr *qname,
+	       struct smb_fattr *entry)
+{
+	struct dentry *newdent, *dentry = filp->f_path.dentry;
+	struct inode *newino, *inode = dentry->d_inode;
+	struct smb_cache_control ctl = *ctrl;
+	int valid = 0;
+	int hashed = 0;
+	ino_t ino = 0;
+
+	qname->hash = full_name_hash(qname->name, qname->len);
+
+	if (dentry->d_op && dentry->d_op->d_hash)
+		if (dentry->d_op->d_hash(dentry, qname) != 0)
+			goto end_advance;
+
+	newdent = d_lookup(dentry, qname);
+
+	if (!newdent) {
+		newdent = d_alloc(dentry, qname);
+		if (!newdent)
+			goto end_advance;
+	} else {
+		hashed = 1;
+		memcpy((char *) newdent->d_name.name, qname->name,
+		       newdent->d_name.len);
+	}
+
+	if (!newdent->d_inode) {
+		smb_renew_times(newdent);
+		entry->f_ino = iunique(inode->i_sb, 2);
+		newino = smb_iget(inode->i_sb, entry);
+		if (newino) {
+			smb_new_dentry(newdent);
+			d_instantiate(newdent, newino);
+			if (!hashed)
+				d_rehash(newdent);
+		}
+	} else
+		smb_set_inode_attr(newdent->d_inode, entry);
+
+        if (newdent->d_inode) {
+		ino = newdent->d_inode->i_ino;
+		newdent->d_fsdata = (void *) ctl.fpos;
+		smb_new_dentry(newdent);
+	}
+
+	if (ctl.idx >= SMB_DIRCACHE_SIZE) {
+		if (ctl.page) {
+			kunmap(ctl.page);
+			SetPageUptodate(ctl.page);
+			unlock_page(ctl.page);
+			page_cache_release(ctl.page);
+		}
+		ctl.cache = NULL;
+		ctl.idx  -= SMB_DIRCACHE_SIZE;
+		ctl.ofs  += 1;
+		ctl.page  = grab_cache_page(&inode->i_data, ctl.ofs);
+		if (ctl.page)
+			ctl.cache = kmap(ctl.page);
+	}
+	if (ctl.cache) {
+		ctl.cache->dentry[ctl.idx] = newdent;
+		valid = 1;
+	}
+	dput(newdent);
+
+end_advance:
+	if (!valid)
+		ctl.valid = 0;
+	if (!ctl.filled && (ctl.fpos == filp->f_pos)) {
+		if (!ino)
+			ino = find_inode_number(dentry, qname);
+		if (!ino)
+			ino = iunique(inode->i_sb, 2);
+		ctl.filled = filldir(dirent, qname->name, qname->len,
+				     filp->f_pos, ino, DT_UNKNOWN);
+		if (!ctl.filled)
+			filp->f_pos += 1;
+	}
+	ctl.fpos += 1;
+	ctl.idx  += 1;
+	*ctrl = ctl;
+	return (ctl.valid || !ctl.filled);
+}

fs/smbfs/dir.c

@@ -0,0 +1,701 @@
+/*
+ *  dir.c
+ *
+ *  Copyright (C) 1995, 1996 by Paal-Kr. Engstad and Volker Lendecke
+ *  Copyright (C) 1997 by Volker Lendecke
+ *
+ *  Please add a note about your changes to smbfs in the ChangeLog file.
+ */
+
+#include <linux/time.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/smp_lock.h>
+#include <linux/ctype.h>
+#include <linux/net.h>
+
+#include <linux/smb_fs.h>
+#include <linux/smb_mount.h>
+#include <linux/smbno.h>
+
+#include "smb_debug.h"
+#include "proto.h"
+
+static int smb_readdir(struct file *, void *, filldir_t);
+static int smb_dir_open(struct inode *, struct file *);
+
+static struct dentry *smb_lookup(struct inode *, struct dentry *, struct nameidata *);
+static int smb_create(struct inode *, struct dentry *, int, struct nameidata *);
+static int smb_mkdir(struct inode *, struct dentry *, int);
+static int smb_rmdir(struct inode *, struct dentry *);
+static int smb_unlink(struct inode *, struct dentry *);
+static int smb_rename(struct inode *, struct dentry *,
+		      struct inode *, struct dentry *);
+static int smb_make_node(struct inode *,struct dentry *,int,dev_t);
+static int smb_link(struct dentry *, struct inode *, struct dentry *);
+
+const struct file_operations smb_dir_operations =
+{
+	.read		= generic_read_dir,
+	.readdir	= smb_readdir,
+	.ioctl		= smb_ioctl,
+	.open		= smb_dir_open,
+};
+
+const struct inode_operations smb_dir_inode_operations =
+{
+	.create		= smb_create,
+	.lookup		= smb_lookup,
+	.unlink		= smb_unlink,
+	.mkdir		= smb_mkdir,
+	.rmdir		= smb_rmdir,
+	.rename		= smb_rename,
+	.getattr	= smb_getattr,
+	.setattr	= smb_notify_change,
+};
+
+const struct inode_operations smb_dir_inode_operations_unix =
+{
+	.create		= smb_create,
+	.lookup		= smb_lookup,
+	.unlink		= smb_unlink,
+	.mkdir		= smb_mkdir,
+	.rmdir		= smb_rmdir,
+	.rename		= smb_rename,
+	.getattr	= smb_getattr,
+	.setattr	= smb_notify_change,
+	.symlink	= smb_symlink,
+	.mknod		= smb_make_node,
+	.link		= smb_link,
+};
+
+/*
+ * Read a directory, using filldir to fill the dirent memory.
+ * smb_proc_readdir does the actual reading from the smb server.
+ *
+ * The cache code is almost directly taken from ncpfs
+ */
+static int 
+smb_readdir(struct file *filp, void *dirent, filldir_t filldir)
+{
+	struct dentry *dentry = filp->f_path.dentry;
+	struct inode *dir = dentry->d_inode;
+	struct smb_sb_info *server = server_from_dentry(dentry);
+	union  smb_dir_cache *cache = NULL;
+	struct smb_cache_control ctl;
+	struct page *page = NULL;
+	int result;
+
+	ctl.page  = NULL;
+	ctl.cache = NULL;
+
+	VERBOSE("reading %s/%s, f_pos=%d\n",
+		DENTRY_PATH(dentry),  (int) filp->f_pos);
+
+	result = 0;
+
+	lock_kernel();
+
+	switch ((unsigned int) filp->f_pos) {
+	case 0:
+		if (filldir(dirent, ".", 1, 0, dir->i_ino, DT_DIR) < 0)
+			goto out;
+		filp->f_pos = 1;
+		/* fallthrough */
+	case 1:
+		if (filldir(dirent, "..", 2, 1, parent_ino(dentry), DT_DIR) < 0)
+			goto out;
+		filp->f_pos = 2;
+	}
+
+	/*
+	 * Make sure our inode is up-to-date.
+	 */
+	result = smb_revalidate_inode(dentry);
+	if (result)
+		goto out;
+
+
+	page = grab_cache_page(&dir->i_data, 0);
+	if (!page)
+		goto read_really;
+
+	ctl.cache = cache = kmap(page);
+	ctl.head  = cache->head;
+
+	if (!PageUptodate(page) || !ctl.head.eof) {
+		VERBOSE("%s/%s, page uptodate=%d, eof=%d\n",
+			 DENTRY_PATH(dentry), PageUptodate(page),ctl.head.eof);
+		goto init_cache;
+	}
+
+	if (filp->f_pos == 2) {
+		if (jiffies - ctl.head.time >= SMB_MAX_AGE(server))
+			goto init_cache;
+
+		/*
+		 * N.B. ncpfs checks mtime of dentry too here, we don't.
+		 *   1. common smb servers do not update mtime on dir changes
+		 *   2. it requires an extra smb request
+		 *      (revalidate has the same timeout as ctl.head.time)
+		 *
+		 * Instead smbfs invalidates its own cache on local changes
+		 * and remote changes are not seen until timeout.
+		 */
+	}
+
+	if (filp->f_pos > ctl.head.end)
+		goto finished;
+
+	ctl.fpos = filp->f_pos + (SMB_DIRCACHE_START - 2);
+	ctl.ofs  = ctl.fpos / SMB_DIRCACHE_SIZE;
+	ctl.idx  = ctl.fpos % SMB_DIRCACHE_SIZE;
+
+	for (;;) {
+		if (ctl.ofs != 0) {
+			ctl.page = find_lock_page(&dir->i_data, ctl.ofs);
+			if (!ctl.page)
+				goto invalid_cache;
+			ctl.cache = kmap(ctl.page);
+			if (!PageUptodate(ctl.page))
+				goto invalid_cache;
+		}
+		while (ctl.idx < SMB_DIRCACHE_SIZE) {
+			struct dentry *dent;
+			int res;
+
+			dent = smb_dget_fpos(ctl.cache->dentry[ctl.idx],
+					     dentry, filp->f_pos);
+			if (!dent)
+				goto invalid_cache;
+
+			res = filldir(dirent, dent->d_name.name,
+				      dent->d_name.len, filp->f_pos,
+				      dent->d_inode->i_ino, DT_UNKNOWN);
+			dput(dent);
+			if (res)
+				goto finished;
+			filp->f_pos += 1;
+			ctl.idx += 1;
+			if (filp->f_pos > ctl.head.end)
+				goto finished;
+		}
+		if (ctl.page) {
+			kunmap(ctl.page);
+			SetPageUptodate(ctl.page);
+			unlock_page(ctl.page);
+			page_cache_release(ctl.page);
+			ctl.page = NULL;
+		}
+		ctl.idx  = 0;
+		ctl.ofs += 1;
+	}
+invalid_cache:
+	if (ctl.page) {
+		kunmap(ctl.page);
+		unlock_page(ctl.page);
+		page_cache_release(ctl.page);
+		ctl.page = NULL;
+	}
+	ctl.cache = cache;
+init_cache:
+	smb_invalidate_dircache_entries(dentry);
+	ctl.head.time = jiffies;
+	ctl.head.eof = 0;
+	ctl.fpos = 2;
+	ctl.ofs = 0;
+	ctl.idx = SMB_DIRCACHE_START;
+	ctl.filled = 0;
+	ctl.valid  = 1;
+read_really:
+	result = server->ops->readdir(filp, dirent, filldir, &ctl);
+	if (result == -ERESTARTSYS && page)
+		ClearPageUptodate(page);
+	if (ctl.idx == -1)
+		goto invalid_cache;	/* retry */
+	ctl.head.end = ctl.fpos - 1;
+	ctl.head.eof = ctl.valid;
+finished:
+	if (page) {
+		cache->head = ctl.head;
+		kunmap(page);
+		if (result != -ERESTARTSYS)
+			SetPageUptodate(page);
+		unlock_page(page);
+		page_cache_release(page);
+	}
+	if (ctl.page) {
+		kunmap(ctl.page);
+		SetPageUptodate(ctl.page);
+		unlock_page(ctl.page);
+		page_cache_release(ctl.page);
+	}
+out:
+	unlock_kernel();
+	return result;
+}
+
+static int
+smb_dir_open(struct inode *dir, struct file *file)
+{
+	struct dentry *dentry = file->f_path.dentry;
+	struct smb_sb_info *server;
+	int error = 0;
+
+	VERBOSE("(%s/%s)\n", dentry->d_parent->d_name.name,
+		file->f_path.dentry->d_name.name);
+
+	/*
+	 * Directory timestamps in the core protocol aren't updated
+	 * when a file is added, so we give them a very short TTL.
+	 */
+	lock_kernel();
+	server = server_from_dentry(dentry);
+	if (server->opt.protocol < SMB_PROTOCOL_LANMAN2) {
+		unsigned long age = jiffies - SMB_I(dir)->oldmtime;
+		if (age > 2*HZ)
+			smb_invalid_dir_cache(dir);
+	}
+
+	/*
+	 * Note: in order to allow the smbmount process to open the
+	 * mount point, we only revalidate if the connection is valid or
+	 * if the process is trying to access something other than the root.
+	 */
+	if (server->state == CONN_VALID || !IS_ROOT(dentry))
+		error = smb_revalidate_inode(dentry);
+	unlock_kernel();
+	return error;
+}
+
+/*
+ * Dentry operations routines
+ */
+static int smb_lookup_validate(struct dentry *, struct nameidata *);
+static int smb_hash_dentry(struct dentry *, struct qstr *);
+static int smb_compare_dentry(struct dentry *, struct qstr *, struct qstr *);
+static int smb_delete_dentry(struct dentry *);
+
+static struct dentry_operations smbfs_dentry_operations =
+{
+	.d_revalidate	= smb_lookup_validate,
+	.d_hash		= smb_hash_dentry,
+	.d_compare	= smb_compare_dentry,
+	.d_delete	= smb_delete_dentry,
+};
+
+static struct dentry_operations smbfs_dentry_operations_case =
+{
+	.d_revalidate	= smb_lookup_validate,
+	.d_delete	= smb_delete_dentry,
+};
+
+
+/*
+ * This is the callback when the dcache has a lookup hit.
+ */
+static int
+smb_lookup_validate(struct dentry * dentry, struct nameidata *nd)
+{
+	struct smb_sb_info *server = server_from_dentry(dentry);
+	struct inode * inode = dentry->d_inode;
+	unsigned long age = jiffies - dentry->d_time;
+	int valid;
+
+	/*
+	 * The default validation is based on dentry age:
+	 * we believe in dentries for a few seconds.  (But each
+	 * successful server lookup renews the timestamp.)
+	 */
+	valid = (age <= SMB_MAX_AGE(server));
+#ifdef SMBFS_DEBUG_VERBOSE
+	if (!valid)
+		VERBOSE("%s/%s not valid, age=%lu\n", 
+			DENTRY_PATH(dentry), age);
+#endif
+
+	if (inode) {
+		lock_kernel();
+		if (is_bad_inode(inode)) {
+			PARANOIA("%s/%s has dud inode\n", DENTRY_PATH(dentry));
+			valid = 0;
+		} else if (!valid)
+			valid = (smb_revalidate_inode(dentry) == 0);
+		unlock_kernel();
+	} else {
+		/*
+		 * What should we do for negative dentries?
+		 */
+	}
+	return valid;
+}
+
+static int 
+smb_hash_dentry(struct dentry *dir, struct qstr *this)
+{
+	unsigned long hash;
+	int i;
+
+	hash = init_name_hash();
+	for (i=0; i < this->len ; i++)
+		hash = partial_name_hash(tolower(this->name[i]), hash);
+	this->hash = end_name_hash(hash);
+  
+	return 0;
+}
+
+static int
+smb_compare_dentry(struct dentry *dir, struct qstr *a, struct qstr *b)
+{
+	int i, result = 1;
+
+	if (a->len != b->len)
+		goto out;
+	for (i=0; i < a->len; i++) {
+		if (tolower(a->name[i]) != tolower(b->name[i]))
+			goto out;
+	}
+	result = 0;
+out:
+	return result;
+}
+
+/*
+ * This is the callback from dput() when d_count is going to 0.
+ * We use this to unhash dentries with bad inodes.
+ */
+static int
+smb_delete_dentry(struct dentry * dentry)
+{
+	if (dentry->d_inode) {
+		if (is_bad_inode(dentry->d_inode)) {
+			PARANOIA("bad inode, unhashing %s/%s\n",
+				 DENTRY_PATH(dentry));
+			return 1;
+		}
+	} else {
+		/* N.B. Unhash negative dentries? */
+	}
+	return 0;
+}
+
+/*
+ * Initialize a new dentry
+ */
+void
+smb_new_dentry(struct dentry *dentry)
+{
+	struct smb_sb_info *server = server_from_dentry(dentry);
+
+	if (server->mnt->flags & SMB_MOUNT_CASE)
+		dentry->d_op = &smbfs_dentry_operations_case;
+	else
+		dentry->d_op = &smbfs_dentry_operations;
+	dentry->d_time = jiffies;
+}
+
+
+/*
+ * Whenever a lookup succeeds, we know the parent directories
+ * are all valid, so we want to update the dentry timestamps.
+ * N.B. Move this to dcache?
+ */
+void
+smb_renew_times(struct dentry * dentry)
+{
+	dget(dentry);
+	spin_lock(&dentry->d_lock);
+	for (;;) {
+		struct dentry *parent;
+
+		dentry->d_time = jiffies;
+		if (IS_ROOT(dentry))
+			break;
+		parent = dentry->d_parent;
+		dget(parent);
+		spin_unlock(&dentry->d_lock);
+		dput(dentry);
+		dentry = parent;
+		spin_lock(&dentry->d_lock);
+	}
+	spin_unlock(&dentry->d_lock);
+	dput(dentry);
+}
+
+static struct dentry *
+smb_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+{
+	struct smb_fattr finfo;
+	struct inode *inode;
+	int error;
+	struct smb_sb_info *server;
+
+	error = -ENAMETOOLONG;
+	if (dentry->d_name.len > SMB_MAXNAMELEN)
+		goto out;
+
+	/* Do not allow lookup of names with backslashes in */
+	error = -EINVAL;
+	if (memchr(dentry->d_name.name, '\\', dentry->d_name.len))
+		goto out;
+
+	lock_kernel();
+	error = smb_proc_getattr(dentry, &finfo);
+#ifdef SMBFS_PARANOIA
+	if (error && error != -ENOENT)
+		PARANOIA("find %s/%s failed, error=%d\n",
+			 DENTRY_PATH(dentry), error);
+#endif
+
+	inode = NULL;
+	if (error == -ENOENT)
+		goto add_entry;
+	if (!error) {
+		error = -EACCES;
+		finfo.f_ino = iunique(dentry->d_sb, 2);
+		inode = smb_iget(dir->i_sb, &finfo);
+		if (inode) {
+	add_entry:
+			server = server_from_dentry(dentry);
+			if (server->mnt->flags & SMB_MOUNT_CASE)
+				dentry->d_op = &smbfs_dentry_operations_case;
+			else
+				dentry->d_op = &smbfs_dentry_operations;
+
+			d_add(dentry, inode);
+			smb_renew_times(dentry);
+			error = 0;
+		}
+	}
+	unlock_kernel();
+out:
+	return ERR_PTR(error);
+}
+
+/*
+ * This code is common to all routines creating a new inode.
+ */
+static int
+smb_instantiate(struct dentry *dentry, __u16 fileid, int have_id)
+{
+	struct smb_sb_info *server = server_from_dentry(dentry);
+	struct inode *inode;
+	int error;
+	struct smb_fattr fattr;
+
+	VERBOSE("file %s/%s, fileid=%u\n", DENTRY_PATH(dentry), fileid);
+
+	error = smb_proc_getattr(dentry, &fattr);
+	if (error)
+		goto out_close;
+
+	smb_renew_times(dentry);
+	fattr.f_ino = iunique(dentry->d_sb, 2);
+	inode = smb_iget(dentry->d_sb, &fattr);
+	if (!inode)
+		goto out_no_inode;
+
+	if (have_id) {
+		struct smb_inode_info *ei = SMB_I(inode);
+		ei->fileid = fileid;
+		ei->access = SMB_O_RDWR;
+		ei->open = server->generation;
+	}
+	d_instantiate(dentry, inode);
+out:
+	return error;
+
+out_no_inode:
+	error = -EACCES;
+out_close:
+	if (have_id) {
+		PARANOIA("%s/%s failed, error=%d, closing %u\n",
+			 DENTRY_PATH(dentry), error, fileid);
+		smb_close_fileid(dentry, fileid);
+	}
+	goto out;
+}
+
+/* N.B. How should the mode argument be used? */
+static int
+smb_create(struct inode *dir, struct dentry *dentry, int mode,
+		struct nameidata *nd)
+{
+	struct smb_sb_info *server = server_from_dentry(dentry);
+	__u16 fileid;
+	int error;
+	struct iattr attr;
+
+	VERBOSE("creating %s/%s, mode=%d\n", DENTRY_PATH(dentry), mode);
+
+	lock_kernel();
+	smb_invalid_dir_cache(dir);
+	error = smb_proc_create(dentry, 0, get_seconds(), &fileid);
+	if (!error) {
+		if (server->opt.capabilities & SMB_CAP_UNIX) {
+			/* Set attributes for new file */
+			attr.ia_valid = ATTR_MODE;
+			attr.ia_mode = mode;
+			error = smb_proc_setattr_unix(dentry, &attr, 0, 0);
+		}
+		error = smb_instantiate(dentry, fileid, 1);
+	} else {
+		PARANOIA("%s/%s failed, error=%d\n",
+			 DENTRY_PATH(dentry), error);
+	}
+	unlock_kernel();
+	return error;
+}
+
+/* N.B. How should the mode argument be used? */
+static int
+smb_mkdir(struct inode *dir, struct dentry *dentry, int mode)
+{
+	struct smb_sb_info *server = server_from_dentry(dentry);
+	int error;
+	struct iattr attr;
+
+	lock_kernel();
+	smb_invalid_dir_cache(dir);
+	error = smb_proc_mkdir(dentry);
+	if (!error) {
+		if (server->opt.capabilities & SMB_CAP_UNIX) {
+			/* Set attributes for new directory */
+			attr.ia_valid = ATTR_MODE;
+			attr.ia_mode = mode;
+			error = smb_proc_setattr_unix(dentry, &attr, 0, 0);
+		}
+		error = smb_instantiate(dentry, 0, 0);
+	}
+	unlock_kernel();
+	return error;
+}
+
+static int
+smb_rmdir(struct inode *dir, struct dentry *dentry)
+{
+	struct inode *inode = dentry->d_inode;
+	int error;
+
+	/*
+	 * Close the directory if it's open.
+	 */
+	lock_kernel();
+	smb_close(inode);
+
+	/*
+	 * Check that nobody else is using the directory..
+	 */
+	error = -EBUSY;
+	if (!d_unhashed(dentry))
+		goto out;
+
+	smb_invalid_dir_cache(dir);
+	error = smb_proc_rmdir(dentry);
+
+out:
+	unlock_kernel();
+	return error;
+}
+
+static int
+smb_unlink(struct inode *dir, struct dentry *dentry)
+{
+	int error;
+
+	/*
+	 * Close the file if it's open.
+	 */
+	lock_kernel();
+	smb_close(dentry->d_inode);
+
+	smb_invalid_dir_cache(dir);
+	error = smb_proc_unlink(dentry);
+	if (!error)
+		smb_renew_times(dentry);
+	unlock_kernel();
+	return error;
+}
+
+static int
+smb_rename(struct inode *old_dir, struct dentry *old_dentry,
+	   struct inode *new_dir, struct dentry *new_dentry)
+{
+	int error;
+
+	/*
+	 * Close any open files, and check whether to delete the
+	 * target before attempting the rename.
+	 */
+	lock_kernel();
+	if (old_dentry->d_inode)
+		smb_close(old_dentry->d_inode);
+	if (new_dentry->d_inode) {
+		smb_close(new_dentry->d_inode);
+		error = smb_proc_unlink(new_dentry);
+		if (error) {
+			VERBOSE("unlink %s/%s, error=%d\n",
+				DENTRY_PATH(new_dentry), error);
+			goto out;
+		}
+		/* FIXME */
+		d_delete(new_dentry);
+	}
+
+	smb_invalid_dir_cache(old_dir);
+	smb_invalid_dir_cache(new_dir);
+	error = smb_proc_mv(old_dentry, new_dentry);
+	if (!error) {
+		smb_renew_times(old_dentry);
+		smb_renew_times(new_dentry);
+	}
+out:
+	unlock_kernel();
+	return error;
+}
+
+/*
+ * FIXME: samba servers won't let you create device nodes unless uid/gid
+ * matches the connection credentials (and we don't know which those are ...)
+ */
+static int
+smb_make_node(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
+{
+	int error;
+	struct iattr attr;
+
+	attr.ia_valid = ATTR_MODE | ATTR_UID | ATTR_GID;
+	attr.ia_mode = mode;
+	attr.ia_uid = current->euid;
+	attr.ia_gid = current->egid;
+
+	if (!new_valid_dev(dev))
+		return -EINVAL;
+
+	smb_invalid_dir_cache(dir);
+	error = smb_proc_setattr_unix(dentry, &attr, MAJOR(dev), MINOR(dev));
+	if (!error) {
+		error = smb_instantiate(dentry, 0, 0);
+	}
+	return error;
+}
+
+/*
+ * dentry = existing file
+ * new_dentry = new file
+ */
+static int
+smb_link(struct dentry *dentry, struct inode *dir, struct dentry *new_dentry)
+{
+	int error;
+
+	DEBUG1("smb_link old=%s/%s new=%s/%s\n",
+	       DENTRY_PATH(dentry), DENTRY_PATH(new_dentry));
+	smb_invalid_dir_cache(dir);
+	error = smb_proc_link(server_from_dentry(dentry), dentry, new_dentry);
+	if (!error) {
+		smb_renew_times(dentry);
+		error = smb_instantiate(new_dentry, 0, 0);
+	}
+	return error;
+}

fs/smbfs/file.c

@@ -0,0 +1,426 @@
+/*
+ *  file.c
+ *
+ *  Copyright (C) 1995, 1996, 1997 by Paal-Kr. Engstad and Volker Lendecke
+ *  Copyright (C) 1997 by Volker Lendecke
+ *
+ *  Please add a note about your changes to smbfs in the ChangeLog file.
+ */
+
+#include <linux/time.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/fcntl.h>
+#include <linux/stat.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/pagemap.h>
+#include <linux/smp_lock.h>
+#include <linux/net.h>
+
+#include <asm/uaccess.h>
+#include <asm/system.h>
+
+#include <linux/smbno.h>
+#include <linux/smb_fs.h>
+
+#include "smb_debug.h"
+#include "proto.h"
+
+static int
+smb_fsync(struct file *file, struct dentry * dentry, int datasync)
+{
+	struct smb_sb_info *server = server_from_dentry(dentry);
+	int result;
+
+	VERBOSE("sync file %s/%s\n", DENTRY_PATH(dentry));
+
+	/*
+	 * The VFS will writepage() all dirty pages for us, but we
+	 * should send a SMBflush to the server, letting it know that
+	 * we want things synchronized with actual storage.
+	 *
+	 * Note: this function requires all pages to have been written already
+	 *       (should be ok with writepage_sync)
+	 */
+	result = smb_proc_flush(server, SMB_I(dentry->d_inode)->fileid);
+	return result;
+}
+
+/*
+ * Read a page synchronously.
+ */
+static int
+smb_readpage_sync(struct dentry *dentry, struct page *page)
+{
+	char *buffer = kmap(page);
+	loff_t offset = (loff_t)page->index << PAGE_CACHE_SHIFT;
+	struct smb_sb_info *server = server_from_dentry(dentry);
+	unsigned int rsize = smb_get_rsize(server);
+	int count = PAGE_SIZE;
+	int result;
+
+	VERBOSE("file %s/%s, count=%d@%Ld, rsize=%d\n",
+		DENTRY_PATH(dentry), count, offset, rsize);
+
+	result = smb_open(dentry, SMB_O_RDONLY);
+	if (result < 0)
+		goto io_error;
+
+	do {
+		if (count < rsize)
+			rsize = count;
+
+		result = server->ops->read(dentry->d_inode,offset,rsize,buffer);
+		if (result < 0)
+			goto io_error;
+
+		count -= result;
+		offset += result;
+		buffer += result;
+		dentry->d_inode->i_atime =
+			current_fs_time(dentry->d_inode->i_sb);
+		if (result < rsize)
+			break;
+	} while (count);
+
+	memset(buffer, 0, count);
+	flush_dcache_page(page);
+	SetPageUptodate(page);
+	result = 0;
+
+io_error:
+	kunmap(page);
+	unlock_page(page);
+	return result;
+}
+
+/*
+ * We are called with the page locked and we unlock it when done.
+ */
+static int
+smb_readpage(struct file *file, struct page *page)
+{
+	int		error;
+	struct dentry  *dentry = file->f_path.dentry;
+
+	page_cache_get(page);
+	error = smb_readpage_sync(dentry, page);
+	page_cache_release(page);
+	return error;
+}
+
+/*
+ * Write a page synchronously.
+ * Offset is the data offset within the page.
+ */
+static int
+smb_writepage_sync(struct inode *inode, struct page *page,
+		   unsigned long pageoffset, unsigned int count)
+{
+	loff_t offset;
+	char *buffer = kmap(page) + pageoffset;
+	struct smb_sb_info *server = server_from_inode(inode);
+	unsigned int wsize = smb_get_wsize(server);
+	int ret = 0;
+
+	offset = ((loff_t)page->index << PAGE_CACHE_SHIFT) + pageoffset;
+	VERBOSE("file ino=%ld, fileid=%d, count=%d@%Ld, wsize=%d\n",
+		inode->i_ino, SMB_I(inode)->fileid, count, offset, wsize);
+
+	do {
+		int write_ret;
+
+		if (count < wsize)
+			wsize = count;
+
+		write_ret = server->ops->write(inode, offset, wsize, buffer);
+		if (write_ret < 0) {
+			PARANOIA("failed write, wsize=%d, write_ret=%d\n",
+				 wsize, write_ret);
+			ret = write_ret;
+			break;
+		}
+		/* N.B. what if result < wsize?? */
+#ifdef SMBFS_PARANOIA
+		if (write_ret < wsize)
+			PARANOIA("short write, wsize=%d, write_ret=%d\n",
+				 wsize, write_ret);
+#endif
+		buffer += wsize;
+		offset += wsize;
+		count -= wsize;
+		/*
+		 * Update the inode now rather than waiting for a refresh.
+		 */
+		inode->i_mtime = inode->i_atime = current_fs_time(inode->i_sb);
+		SMB_I(inode)->flags |= SMB_F_LOCALWRITE;
+		if (offset > inode->i_size)
+			inode->i_size = offset;
+	} while (count);
+
+	kunmap(page);
+	return ret;
+}
+
+/*
+ * Write a page to the server. This will be used for NFS swapping only
+ * (for now), and we currently do this synchronously only.
+ *
+ * We are called with the page locked and we unlock it when done.
+ */
+static int
+smb_writepage(struct page *page, struct writeback_control *wbc)
+{
+	struct address_space *mapping = page->mapping;
+	struct inode *inode;
+	unsigned long end_index;
+	unsigned offset = PAGE_CACHE_SIZE;
+	int err;
+
+	BUG_ON(!mapping);
+	inode = mapping->host;
+	BUG_ON(!inode);
+
+	end_index = inode->i_size >> PAGE_CACHE_SHIFT;
+
+	/* easy case */
+	if (page->index < end_index)
+		goto do_it;
+	/* things got complicated... */
+	offset = inode->i_size & (PAGE_CACHE_SIZE-1);
+	/* OK, are we completely out? */
+	if (page->index >= end_index+1 || !offset)
+		return 0; /* truncated - don't care */
+do_it:
+	page_cache_get(page);
+	err = smb_writepage_sync(inode, page, 0, offset);
+	SetPageUptodate(page);
+	unlock_page(page);
+	page_cache_release(page);
+	return err;
+}
+
+static int
+smb_updatepage(struct file *file, struct page *page, unsigned long offset,
+	       unsigned int count)
+{
+	struct dentry *dentry = file->f_path.dentry;
+
+	DEBUG1("(%s/%s %d@%lld)\n", DENTRY_PATH(dentry), count,
+		((unsigned long long)page->index << PAGE_CACHE_SHIFT) + offset);
+
+	return smb_writepage_sync(dentry->d_inode, page, offset, count);
+}
+
+static ssize_t
+smb_file_aio_read(struct kiocb *iocb, const struct iovec *iov,
+			unsigned long nr_segs, loff_t pos)
+{
+	struct file * file = iocb->ki_filp;
+	struct dentry * dentry = file->f_path.dentry;
+	ssize_t	status;
+
+	VERBOSE("file %s/%s, count=%lu@%lu\n", DENTRY_PATH(dentry),
+		(unsigned long) iocb->ki_left, (unsigned long) pos);
+
+	status = smb_revalidate_inode(dentry);
+	if (status) {
+		PARANOIA("%s/%s validation failed, error=%Zd\n",
+			 DENTRY_PATH(dentry), status);
+		goto out;
+	}
+
+	VERBOSE("before read, size=%ld, flags=%x, atime=%ld\n",
+		(long)dentry->d_inode->i_size,
+		dentry->d_inode->i_flags, dentry->d_inode->i_atime);
+
+	status = generic_file_aio_read(iocb, iov, nr_segs, pos);
+out:
+	return status;
+}
+
+static int
+smb_file_mmap(struct file * file, struct vm_area_struct * vma)
+{
+	struct dentry * dentry = file->f_path.dentry;
+	int	status;
+
+	VERBOSE("file %s/%s, address %lu - %lu\n",
+		DENTRY_PATH(dentry), vma->vm_start, vma->vm_end);
+
+	status = smb_revalidate_inode(dentry);
+	if (status) {
+		PARANOIA("%s/%s validation failed, error=%d\n",
+			 DENTRY_PATH(dentry), status);
+		goto out;
+	}
+	status = generic_file_mmap(file, vma);
+out:
+	return status;
+}
+
+static ssize_t
+smb_file_sendfile(struct file *file, loff_t *ppos,
+		  size_t count, read_actor_t actor, void *target)
+{
+	struct dentry *dentry = file->f_path.dentry;
+	ssize_t status;
+
+	VERBOSE("file %s/%s, pos=%Ld, count=%d\n",
+		DENTRY_PATH(dentry), *ppos, count);
+
+	status = smb_revalidate_inode(dentry);
+	if (status) {
+		PARANOIA("%s/%s validation failed, error=%Zd\n",
+			 DENTRY_PATH(dentry), status);
+		goto out;
+	}
+	status = generic_file_sendfile(file, ppos, count, actor, target);
+out:
+	return status;
+}
+
+/*
+ * This does the "real" work of the write. The generic routine has
+ * allocated the page, locked it, done all the page alignment stuff
+ * calculations etc. Now we should just copy the data from user
+ * space and write it back to the real medium..
+ *
+ * If the writer ends up delaying the write, the writer needs to
+ * increment the page use counts until he is done with the page.
+ */
+static int smb_prepare_write(struct file *file, struct page *page, 
+			     unsigned offset, unsigned to)
+{
+	return 0;
+}
+
+static int smb_commit_write(struct file *file, struct page *page,
+			    unsigned offset, unsigned to)
+{
+	int status;
+
+	status = -EFAULT;
+	lock_kernel();
+	status = smb_updatepage(file, page, offset, to-offset);
+	unlock_kernel();
+	return status;
+}
+
+const struct address_space_operations smb_file_aops = {
+	.readpage = smb_readpage,
+	.writepage = smb_writepage,
+	.prepare_write = smb_prepare_write,
+	.commit_write = smb_commit_write
+};
+
+/* 
+ * Write to a file (through the page cache).
+ */
+static ssize_t
+smb_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
+			       unsigned long nr_segs, loff_t pos)
+{
+	struct file * file = iocb->ki_filp;
+	struct dentry * dentry = file->f_path.dentry;
+	ssize_t	result;
+
+	VERBOSE("file %s/%s, count=%lu@%lu\n",
+		DENTRY_PATH(dentry),
+		(unsigned long) iocb->ki_left, (unsigned long) pos);
+
+	result = smb_revalidate_inode(dentry);
+	if (result) {
+		PARANOIA("%s/%s validation failed, error=%Zd\n",
+			 DENTRY_PATH(dentry), result);
+		goto out;
+	}
+
+	result = smb_open(dentry, SMB_O_WRONLY);
+	if (result)
+		goto out;
+
+	if (iocb->ki_left > 0) {
+		result = generic_file_aio_write(iocb, iov, nr_segs, pos);
+		VERBOSE("pos=%ld, size=%ld, mtime=%ld, atime=%ld\n",
+			(long) file->f_pos, (long) dentry->d_inode->i_size,
+			dentry->d_inode->i_mtime, dentry->d_inode->i_atime);
+	}
+out:
+	return result;
+}
+
+static int
+smb_file_open(struct inode *inode, struct file * file)
+{
+	int result;
+	struct dentry *dentry = file->f_path.dentry;
+	int smb_mode = (file->f_mode & O_ACCMODE) - 1;
+
+	lock_kernel();
+	result = smb_open(dentry, smb_mode);
+	if (result)
+		goto out;
+	SMB_I(inode)->openers++;
+out:
+	unlock_kernel();
+	return result;
+}
+
+static int
+smb_file_release(struct inode *inode, struct file * file)
+{
+	lock_kernel();
+	if (!--SMB_I(inode)->openers) {
+		/* We must flush any dirty pages now as we won't be able to
+		   write anything after close. mmap can trigger this.
+		   "openers" should perhaps include mmap'ers ... */
+		filemap_write_and_wait(inode->i_mapping);
+		smb_close(inode);
+	}
+	unlock_kernel();
+	return 0;
+}
+
+/*
+ * Check whether the required access is compatible with
+ * an inode's permission. SMB doesn't recognize superuser
+ * privileges, so we need our own check for this.
+ */
+static int
+smb_file_permission(struct inode *inode, int mask, struct nameidata *nd)
+{
+	int mode = inode->i_mode;
+	int error = 0;
+
+	VERBOSE("mode=%x, mask=%x\n", mode, mask);
+
+	/* Look at user permissions */
+	mode >>= 6;
+	if ((mode & 7 & mask) != mask)
+		error = -EACCES;
+	return error;
+}
+
+const struct file_operations smb_file_operations =
+{
+	.llseek		= remote_llseek,
+	.read		= do_sync_read,
+	.aio_read	= smb_file_aio_read,
+	.write		= do_sync_write,
+	.aio_write	= smb_file_aio_write,
+	.ioctl		= smb_ioctl,
+	.mmap		= smb_file_mmap,
+	.open		= smb_file_open,
+	.release	= smb_file_release,
+	.fsync		= smb_fsync,
+	.sendfile	= smb_file_sendfile,
+};
+
+const struct inode_operations smb_file_inode_operations =
+{
+	.permission	= smb_file_permission,
+	.getattr	= smb_getattr,
+	.setattr	= smb_notify_change,
+};

fs/smbfs/getopt.c

@@ -0,0 +1,64 @@
+/*
+ * getopt.c
+ */
+
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/net.h>
+
+#include "getopt.h"
+
+/**
+ *	smb_getopt - option parser
+ *	@caller: name of the caller, for error messages
+ *	@options: the options string
+ *	@opts: an array of &struct option entries controlling parser operations
+ *	@optopt: output; will contain the current option
+ *	@optarg: output; will contain the value (if one exists)
+ *	@flag: output; may be NULL; should point to a long for or'ing flags
+ *	@value: output; may be NULL; will be overwritten with the integer value
+ *		of the current argument.
+ *
+ *	Helper to parse options on the format used by mount ("a=b,c=d,e,f").
+ *	Returns opts->val if a matching entry in the 'opts' array is found,
+ *	0 when no more tokens are found, -1 if an error is encountered.
+ */
+int smb_getopt(char *caller, char **options, struct option *opts,
+	       char **optopt, char **optarg, unsigned long *flag,
+	       unsigned long *value)
+{
+	char *token;
+	char *val;
+	int i;
+
+	do {
+		if ((token = strsep(options, ",")) == NULL)
+			return 0;
+	} while (*token == '\0');
+	*optopt = token;
+
+	*optarg = NULL;
+	if ((val = strchr (token, '=')) != NULL) {
+		*val++ = 0;
+		if (value)
+			*value = simple_strtoul(val, NULL, 0);
+		*optarg = val;
+	}
+
+	for (i = 0; opts[i].name != NULL; i++) {
+		if (!strcmp(opts[i].name, token)) {
+			if (!opts[i].flag && (!val || !*val)) {
+				printk("%s: the %s option requires an argument\n",
+				       caller, token);
+				return -1;
+			}
+
+			if (flag && opts[i].flag)
+				*flag |= opts[i].flag;
+
+			return opts[i].val;
+		}
+	}
+	printk("%s: Unrecognized mount option %s\n", caller, token);
+	return -1;
+}

fs/smbfs/getopt.h

@@ -0,0 +1,14 @@
+#ifndef _LINUX_GETOPT_H
+#define _LINUX_GETOPT_H
+
+struct option {
+	const char *name;
+	unsigned long flag;
+	int val;
+};
+
+extern int smb_getopt(char *caller, char **options, struct option *opts,
+		      char **optopt, char **optarg, unsigned long *flag,
+		      unsigned long *value);
+
+#endif /* _LINUX_GETOPT_H */

fs/smbfs/inode.c

@@ -0,0 +1,829 @@
+/*
+ *  inode.c
+ *
+ *  Copyright (C) 1995, 1996 by Paal-Kr. Engstad and Volker Lendecke
+ *  Copyright (C) 1997 by Volker Lendecke
+ *
+ *  Please add a note about your changes to smbfs in the ChangeLog file.
+ */
+
+#include <linux/module.h>
+#include <linux/time.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/stat.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/file.h>
+#include <linux/dcache.h>
+#include <linux/smp_lock.h>
+#include <linux/nls.h>
+#include <linux/seq_file.h>
+#include <linux/mount.h>
+#include <linux/net.h>
+#include <linux/vfs.h>
+#include <linux/highuid.h>
+#include <linux/smb_fs.h>
+#include <linux/smbno.h>
+#include <linux/smb_mount.h>
+
+#include <asm/system.h>
+#include <asm/uaccess.h>
+
+#include "smb_debug.h"
+#include "getopt.h"
+#include "proto.h"
+
+/* Always pick a default string */
+#ifdef CONFIG_SMB_NLS_REMOTE
+#define SMB_NLS_REMOTE CONFIG_SMB_NLS_REMOTE
+#else
+#define SMB_NLS_REMOTE ""
+#endif
+
+#define SMB_TTL_DEFAULT 1000
+
+static void smb_delete_inode(struct inode *);
+static void smb_put_super(struct super_block *);
+static int  smb_statfs(struct dentry *, struct kstatfs *);
+static int  smb_show_options(struct seq_file *, struct vfsmount *);
+
+static struct kmem_cache *smb_inode_cachep;
+
+static struct inode *smb_alloc_inode(struct super_block *sb)
+{
+	struct smb_inode_info *ei;
+	ei = (struct smb_inode_info *)kmem_cache_alloc(smb_inode_cachep, GFP_KERNEL);
+	if (!ei)
+		return NULL;
+	return &ei->vfs_inode;
+}
+
+static void smb_destroy_inode(struct inode *inode)
+{
+	kmem_cache_free(smb_inode_cachep, SMB_I(inode));
+}
+
+static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags)
+{
+	struct smb_inode_info *ei = (struct smb_inode_info *) foo;
+	unsigned long flagmask = SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR;
+
+	if ((flags & flagmask) == SLAB_CTOR_CONSTRUCTOR)
+		inode_init_once(&ei->vfs_inode);
+}
+ 
+static int init_inodecache(void)
+{
+	smb_inode_cachep = kmem_cache_create("smb_inode_cache",
+					     sizeof(struct smb_inode_info),
+					     0, (SLAB_RECLAIM_ACCOUNT|
+						SLAB_MEM_SPREAD),
+					     init_once, NULL);
+	if (smb_inode_cachep == NULL)
+		return -ENOMEM;
+	return 0;
+}
+
+static void destroy_inodecache(void)
+{
+	kmem_cache_destroy(smb_inode_cachep);
+}
+
+static int smb_remount(struct super_block *sb, int *flags, char *data)
+{
+	*flags |= MS_NODIRATIME;
+	return 0;
+}
+
+static const struct super_operations smb_sops =
+{
+	.alloc_inode	= smb_alloc_inode,
+	.destroy_inode	= smb_destroy_inode,
+	.drop_inode	= generic_delete_inode,
+	.delete_inode	= smb_delete_inode,
+	.put_super	= smb_put_super,
+	.statfs		= smb_statfs,
+	.show_options	= smb_show_options,
+	.remount_fs	= smb_remount,
+};
+
+
+/* We are always generating a new inode here */
+struct inode *
+smb_iget(struct super_block *sb, struct smb_fattr *fattr)
+{
+	struct smb_sb_info *server = SMB_SB(sb);
+	struct inode *result;
+
+	DEBUG1("smb_iget: %p\n", fattr);
+
+	result = new_inode(sb);
+	if (!result)
+		return result;
+	result->i_ino = fattr->f_ino;
+	SMB_I(result)->open = 0;
+	SMB_I(result)->fileid = 0;
+	SMB_I(result)->access = 0;
+	SMB_I(result)->flags = 0;
+	SMB_I(result)->closed = 0;
+	SMB_I(result)->openers = 0;
+	smb_set_inode_attr(result, fattr);
+	if (S_ISREG(result->i_mode)) {
+		result->i_op = &smb_file_inode_operations;
+		result->i_fop = &smb_file_operations;
+		result->i_data.a_ops = &smb_file_aops;
+	} else if (S_ISDIR(result->i_mode)) {
+		if (server->opt.capabilities & SMB_CAP_UNIX)
+			result->i_op = &smb_dir_inode_operations_unix;
+		else
+			result->i_op = &smb_dir_inode_operations;
+		result->i_fop = &smb_dir_operations;
+	} else if (S_ISLNK(result->i_mode)) {
+		result->i_op = &smb_link_inode_operations;
+	} else {
+		init_special_inode(result, result->i_mode, fattr->f_rdev);
+	}
+	insert_inode_hash(result);
+	return result;
+}
+
+/*
+ * Copy the inode data to a smb_fattr structure.
+ */
+void
+smb_get_inode_attr(struct inode *inode, struct smb_fattr *fattr)
+{
+	memset(fattr, 0, sizeof(struct smb_fattr));
+	fattr->f_mode	= inode->i_mode;
+	fattr->f_nlink	= inode->i_nlink;
+	fattr->f_ino	= inode->i_ino;
+	fattr->f_uid	= inode->i_uid;
+	fattr->f_gid	= inode->i_gid;
+	fattr->f_size	= inode->i_size;
+	fattr->f_mtime	= inode->i_mtime;
+	fattr->f_ctime	= inode->i_ctime;
+	fattr->f_atime	= inode->i_atime;
+	fattr->f_blocks	= inode->i_blocks;
+
+	fattr->attr	= SMB_I(inode)->attr;
+	/*
+	 * Keep the attributes in sync with the inode permissions.
+	 */
+	if (fattr->f_mode & S_IWUSR)
+		fattr->attr &= ~aRONLY;
+	else
+		fattr->attr |= aRONLY;
+}
+
+/*
+ * Update the inode, possibly causing it to invalidate its pages if mtime/size
+ * is different from last time.
+ */
+void
+smb_set_inode_attr(struct inode *inode, struct smb_fattr *fattr)
+{
+	struct smb_inode_info *ei = SMB_I(inode);
+
+	/*
+	 * A size change should have a different mtime, or same mtime
+	 * but different size.
+	 */
+	time_t last_time = inode->i_mtime.tv_sec;
+	loff_t last_sz = inode->i_size;
+
+	inode->i_mode	= fattr->f_mode;
+	inode->i_nlink	= fattr->f_nlink;
+	inode->i_uid	= fattr->f_uid;
+	inode->i_gid	= fattr->f_gid;
+	inode->i_ctime	= fattr->f_ctime;
+	inode->i_blocks = fattr->f_blocks;
+	inode->i_size	= fattr->f_size;
+	inode->i_mtime	= fattr->f_mtime;
+	inode->i_atime	= fattr->f_atime;
+	ei->attr = fattr->attr;
+
+	/*
+	 * Update the "last time refreshed" field for revalidation.
+	 */
+	ei->oldmtime = jiffies;
+
+	if (inode->i_mtime.tv_sec != last_time || inode->i_size != last_sz) {
+		VERBOSE("%ld changed, old=%ld, new=%ld, oz=%ld, nz=%ld\n",
+			inode->i_ino,
+			(long) last_time, (long) inode->i_mtime.tv_sec,
+			(long) last_sz, (long) inode->i_size);
+
+		if (!S_ISDIR(inode->i_mode))
+			invalidate_remote_inode(inode);
+	}
+}
+
+/*
+ * This is called if the connection has gone bad ...
+ * try to kill off all the current inodes.
+ */
+void
+smb_invalidate_inodes(struct smb_sb_info *server)
+{
+	VERBOSE("\n");
+	shrink_dcache_sb(SB_of(server));
+	invalidate_inodes(SB_of(server));
+}
+
+/*
+ * This is called to update the inode attributes after
+ * we've made changes to a file or directory.
+ */
+static int
+smb_refresh_inode(struct dentry *dentry)
+{
+	struct inode *inode = dentry->d_inode;
+	int error;
+	struct smb_fattr fattr;
+
+	error = smb_proc_getattr(dentry, &fattr);
+	if (!error) {
+		smb_renew_times(dentry);
+		/*
+		 * Check whether the type part of the mode changed,
+		 * and don't update the attributes if it did.
+		 *
+		 * And don't dick with the root inode
+		 */
+		if (inode->i_ino == 2)
+			return error;
+		if (S_ISLNK(inode->i_mode))
+			return error;	/* VFS will deal with it */
+
+		if ((inode->i_mode & S_IFMT) == (fattr.f_mode & S_IFMT)) {
+			smb_set_inode_attr(inode, &fattr);
+		} else {
+			/*
+			 * Big trouble! The inode has become a new object,
+			 * so any operations attempted on it are invalid.
+			 *
+			 * To limit damage, mark the inode as bad so that
+			 * subsequent lookup validations will fail.
+			 */
+			PARANOIA("%s/%s changed mode, %07o to %07o\n",
+				 DENTRY_PATH(dentry),
+				 inode->i_mode, fattr.f_mode);
+
+			fattr.f_mode = inode->i_mode; /* save mode */
+			make_bad_inode(inode);
+			inode->i_mode = fattr.f_mode; /* restore mode */
+			/*
+			 * No need to worry about unhashing the dentry: the
+			 * lookup validation will see that the inode is bad.
+			 * But we do want to invalidate the caches ...
+			 */
+			if (!S_ISDIR(inode->i_mode))
+				invalidate_remote_inode(inode);
+			else
+				smb_invalid_dir_cache(inode);
+			error = -EIO;
+		}
+	}
+	return error;
+}
+
+/*
+ * This is called when we want to check whether the inode
+ * has changed on the server.  If it has changed, we must
+ * invalidate our local caches.
+ */
+int
+smb_revalidate_inode(struct dentry *dentry)
+{
+	struct smb_sb_info *s = server_from_dentry(dentry);
+	struct inode *inode = dentry->d_inode;
+	int error = 0;
+
+	DEBUG1("smb_revalidate_inode\n");
+	lock_kernel();
+
+	/*
+	 * Check whether we've recently refreshed the inode.
+	 */
+	if (time_before(jiffies, SMB_I(inode)->oldmtime + SMB_MAX_AGE(s))) {
+		VERBOSE("up-to-date, ino=%ld, jiffies=%lu, oldtime=%lu\n",
+			inode->i_ino, jiffies, SMB_I(inode)->oldmtime);
+		goto out;
+	}
+
+	error = smb_refresh_inode(dentry);
+out:
+	unlock_kernel();
+	return error;
+}
+
+/*
+ * This routine is called when i_nlink == 0 and i_count goes to 0.
+ * All blocking cleanup operations need to go here to avoid races.
+ */
+static void
+smb_delete_inode(struct inode *ino)
+{
+	DEBUG1("ino=%ld\n", ino->i_ino);
+	truncate_inode_pages(&ino->i_data, 0);
+	lock_kernel();
+	if (smb_close(ino))
+		PARANOIA("could not close inode %ld\n", ino->i_ino);
+	unlock_kernel();
+	clear_inode(ino);
+}
+
+static struct option opts[] = {
+	{ "version",	0, 'v' },
+	{ "win95",	SMB_MOUNT_WIN95, 1 },
+	{ "oldattr",	SMB_MOUNT_OLDATTR, 1 },
+	{ "dirattr",	SMB_MOUNT_DIRATTR, 1 },
+	{ "case",	SMB_MOUNT_CASE, 1 },
+	{ "uid",	0, 'u' },
+	{ "gid",	0, 'g' },
+	{ "file_mode",	0, 'f' },
+	{ "dir_mode",	0, 'd' },
+	{ "iocharset",	0, 'i' },
+	{ "codepage",	0, 'c' },
+	{ "ttl",	0, 't' },
+	{ NULL,		0, 0}
+};
+
+static int
+parse_options(struct smb_mount_data_kernel *mnt, char *options)
+{
+	int c;
+	unsigned long flags;
+	unsigned long value;
+	char *optarg;
+	char *optopt;
+
+	flags = 0;
+	while ( (c = smb_getopt("smbfs", &options, opts,
+				&optopt, &optarg, &flags, &value)) > 0) {
+
+		VERBOSE("'%s' -> '%s'\n", optopt, optarg ? optarg : "<none>");
+		switch (c) {
+		case 1:
+			/* got a "flag" option */
+			break;
+		case 'v':
+			if (value != SMB_MOUNT_VERSION) {
+			printk ("smbfs: Bad mount version %ld, expected %d\n",
+				value, SMB_MOUNT_VERSION);
+				return 0;
+			}
+			mnt->version = value;
+			break;
+		case 'u':
+			mnt->uid = value;
+			flags |= SMB_MOUNT_UID;
+			break;
+		case 'g':
+			mnt->gid = value;
+			flags |= SMB_MOUNT_GID;
+			break;
+		case 'f':
+			mnt->file_mode = (value & S_IRWXUGO) | S_IFREG;
+			flags |= SMB_MOUNT_FMODE;
+			break;
+		case 'd':
+			mnt->dir_mode = (value & S_IRWXUGO) | S_IFDIR;
+			flags |= SMB_MOUNT_DMODE;
+			break;
+		case 'i':
+			strlcpy(mnt->codepage.local_name, optarg, 
+				SMB_NLS_MAXNAMELEN);
+			break;
+		case 'c':
+			strlcpy(mnt->codepage.remote_name, optarg,
+				SMB_NLS_MAXNAMELEN);
+			break;
+		case 't':
+			mnt->ttl = value;
+			break;
+		default:
+			printk ("smbfs: Unrecognized mount option %s\n",
+				optopt);
+			return -1;
+		}
+	}
+	mnt->flags = flags;
+	return c;
+}
+
+/*
+ * smb_show_options() is for displaying mount options in /proc/mounts.
+ * It tries to avoid showing settings that were not changed from their
+ * defaults.
+ */
+static int
+smb_show_options(struct seq_file *s, struct vfsmount *m)
+{
+	struct smb_mount_data_kernel *mnt = SMB_SB(m->mnt_sb)->mnt;
+	int i;
+
+	for (i = 0; opts[i].name != NULL; i++)
+		if (mnt->flags & opts[i].flag)
+			seq_printf(s, ",%s", opts[i].name);
+
+	if (mnt->flags & SMB_MOUNT_UID)
+		seq_printf(s, ",uid=%d", mnt->uid);
+	if (mnt->flags & SMB_MOUNT_GID)
+		seq_printf(s, ",gid=%d", mnt->gid);
+	if (mnt->mounted_uid != 0)
+		seq_printf(s, ",mounted_uid=%d", mnt->mounted_uid);
+
+	/* 
+	 * Defaults for file_mode and dir_mode are unknown to us; they
+	 * depend on the current umask of the user doing the mount.
+	 */
+	if (mnt->flags & SMB_MOUNT_FMODE)
+		seq_printf(s, ",file_mode=%04o", mnt->file_mode & S_IRWXUGO);
+	if (mnt->flags & SMB_MOUNT_DMODE)
+		seq_printf(s, ",dir_mode=%04o", mnt->dir_mode & S_IRWXUGO);
+
+	if (strcmp(mnt->codepage.local_name, CONFIG_NLS_DEFAULT))
+		seq_printf(s, ",iocharset=%s", mnt->codepage.local_name);
+	if (strcmp(mnt->codepage.remote_name, SMB_NLS_REMOTE))
+		seq_printf(s, ",codepage=%s", mnt->codepage.remote_name);
+
+	if (mnt->ttl != SMB_TTL_DEFAULT)
+		seq_printf(s, ",ttl=%d", mnt->ttl);
+
+	return 0;
+}
+
+static void
+smb_unload_nls(struct smb_sb_info *server)
+{
+	if (server->remote_nls) {
+		unload_nls(server->remote_nls);
+		server->remote_nls = NULL;
+	}
+	if (server->local_nls) {
+		unload_nls(server->local_nls);
+		server->local_nls = NULL;
+	}
+}
+
+static void
+smb_put_super(struct super_block *sb)
+{
+	struct smb_sb_info *server = SMB_SB(sb);
+
+	smb_lock_server(server);
+	server->state = CONN_INVALID;
+	smbiod_unregister_server(server);
+
+	smb_close_socket(server);
+
+	if (server->conn_pid)
+		kill_pid(server->conn_pid, SIGTERM, 1);
+
+	kfree(server->ops);
+	smb_unload_nls(server);
+	sb->s_fs_info = NULL;
+	smb_unlock_server(server);
+	put_pid(server->conn_pid);
+	kfree(server);
+}
+
+static int smb_fill_super(struct super_block *sb, void *raw_data, int silent)
+{
+	struct smb_sb_info *server;
+	struct smb_mount_data_kernel *mnt;
+	struct smb_mount_data *oldmnt;
+	struct inode *root_inode;
+	struct smb_fattr root;
+	int ver;
+	void *mem;
+
+	if (!raw_data)
+		goto out_no_data;
+
+	oldmnt = (struct smb_mount_data *) raw_data;
+	ver = oldmnt->version;
+	if (ver != SMB_MOUNT_OLDVERSION && cpu_to_be32(ver) != SMB_MOUNT_ASCII)
+		goto out_wrong_data;
+
+	sb->s_flags |= MS_NODIRATIME;
+	sb->s_blocksize = 1024;	/* Eh...  Is this correct? */
+	sb->s_blocksize_bits = 10;
+	sb->s_magic = SMB_SUPER_MAGIC;
+	sb->s_op = &smb_sops;
+	sb->s_time_gran = 100;
+
+	server = kzalloc(sizeof(struct smb_sb_info), GFP_KERNEL);
+	if (!server)
+		goto out_no_server;
+	sb->s_fs_info = server;
+
+	server->super_block = sb;
+	server->mnt = NULL;
+	server->sock_file = NULL;
+	init_waitqueue_head(&server->conn_wq);
+	init_MUTEX(&server->sem);
+	INIT_LIST_HEAD(&server->entry);
+	INIT_LIST_HEAD(&server->xmitq);
+	INIT_LIST_HEAD(&server->recvq);
+	server->conn_error = 0;
+	server->conn_pid = NULL;
+	server->state = CONN_INVALID; /* no connection yet */
+	server->generation = 0;
+
+	/* Allocate the global temp buffer and some superblock helper structs */
+	/* FIXME: move these to the smb_sb_info struct */
+	VERBOSE("alloc chunk = %d\n", sizeof(struct smb_ops) +
+		sizeof(struct smb_mount_data_kernel));
+	mem = kmalloc(sizeof(struct smb_ops) +
+		      sizeof(struct smb_mount_data_kernel), GFP_KERNEL);
+	if (!mem)
+		goto out_no_mem;
+
+	server->ops = mem;
+	smb_install_null_ops(server->ops);
+	server->mnt = mem + sizeof(struct smb_ops);
+
+	/* Setup NLS stuff */
+	server->remote_nls = NULL;
+	server->local_nls = NULL;
+
+	mnt = server->mnt;
+
+	memset(mnt, 0, sizeof(struct smb_mount_data_kernel));
+	strlcpy(mnt->codepage.local_name, CONFIG_NLS_DEFAULT,
+		SMB_NLS_MAXNAMELEN);
+	strlcpy(mnt->codepage.remote_name, SMB_NLS_REMOTE,
+		SMB_NLS_MAXNAMELEN);
+
+	mnt->ttl = SMB_TTL_DEFAULT;
+	if (ver == SMB_MOUNT_OLDVERSION) {
+		mnt->version = oldmnt->version;
+
+		SET_UID(mnt->uid, oldmnt->uid);
+		SET_GID(mnt->gid, oldmnt->gid);
+
+		mnt->file_mode = (oldmnt->file_mode & S_IRWXUGO) | S_IFREG;
+		mnt->dir_mode = (oldmnt->dir_mode & S_IRWXUGO) | S_IFDIR;
+
+		mnt->flags = (oldmnt->file_mode >> 9) | SMB_MOUNT_UID |
+			SMB_MOUNT_GID | SMB_MOUNT_FMODE | SMB_MOUNT_DMODE;
+	} else {
+		mnt->file_mode = S_IRWXU | S_IRGRP | S_IXGRP |
+				S_IROTH | S_IXOTH | S_IFREG;
+		mnt->dir_mode = S_IRWXU | S_IRGRP | S_IXGRP |
+				S_IROTH | S_IXOTH | S_IFDIR;
+		if (parse_options(mnt, raw_data))
+			goto out_bad_option;
+	}
+	mnt->mounted_uid = current->uid;
+	smb_setcodepage(server, &mnt->codepage);
+
+	/*
+	 * Display the enabled options
+	 * Note: smb_proc_getattr uses these in 2.4 (but was changed in 2.2)
+	 */
+	if (mnt->flags & SMB_MOUNT_OLDATTR)
+		printk("SMBFS: Using core getattr (Win 95 speedup)\n");
+	else if (mnt->flags & SMB_MOUNT_DIRATTR)
+		printk("SMBFS: Using dir ff getattr\n");
+
+	if (smbiod_register_server(server) < 0) {
+		printk(KERN_ERR "smbfs: failed to start smbiod\n");
+		goto out_no_smbiod;
+	}
+
+	/*
+	 * Keep the super block locked while we get the root inode.
+	 */
+	smb_init_root_dirent(server, &root, sb);
+	root_inode = smb_iget(sb, &root);
+	if (!root_inode)
+		goto out_no_root;
+
+	sb->s_root = d_alloc_root(root_inode);
+	if (!sb->s_root)
+		goto out_no_root;
+
+	smb_new_dentry(sb->s_root);
+
+	return 0;
+
+out_no_root:
+	iput(root_inode);
+out_no_smbiod:
+	smb_unload_nls(server);
+out_bad_option:
+	kfree(mem);
+out_no_mem:
+	if (!server->mnt)
+		printk(KERN_ERR "smb_fill_super: allocation failure\n");
+	sb->s_fs_info = NULL;
+	kfree(server);
+	goto out_fail;
+out_wrong_data:
+	printk(KERN_ERR "smbfs: mount_data version %d is not supported\n", ver);
+	goto out_fail;
+out_no_data:
+	printk(KERN_ERR "smb_fill_super: missing data argument\n");
+out_fail:
+	return -EINVAL;
+out_no_server:
+	printk(KERN_ERR "smb_fill_super: cannot allocate struct smb_sb_info\n");
+	return -ENOMEM;
+}
+
+static int
+smb_statfs(struct dentry *dentry, struct kstatfs *buf)
+{
+	int result;
+	
+	lock_kernel();
+
+	result = smb_proc_dskattr(dentry, buf);
+
+	unlock_kernel();
+
+	buf->f_type = SMB_SUPER_MAGIC;
+	buf->f_namelen = SMB_MAXPATHLEN;
+	return result;
+}
+
+int smb_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
+{
+	int err = smb_revalidate_inode(dentry);
+	if (!err)
+		generic_fillattr(dentry->d_inode, stat);
+	return err;
+}
+
+int
+smb_notify_change(struct dentry *dentry, struct iattr *attr)
+{
+	struct inode *inode = dentry->d_inode;
+	struct smb_sb_info *server = server_from_dentry(dentry);
+	unsigned int mask = (S_IFREG | S_IFDIR | S_IRWXUGO);
+	int error, changed, refresh = 0;
+	struct smb_fattr fattr;
+
+	lock_kernel();
+
+	error = smb_revalidate_inode(dentry);
+	if (error)
+		goto out;
+
+	if ((error = inode_change_ok(inode, attr)) < 0)
+		goto out;
+
+	error = -EPERM;
+	if ((attr->ia_valid & ATTR_UID) && (attr->ia_uid != server->mnt->uid))
+		goto out;
+
+	if ((attr->ia_valid & ATTR_GID) && (attr->ia_uid != server->mnt->gid))
+		goto out;
+
+	if ((attr->ia_valid & ATTR_MODE) && (attr->ia_mode & ~mask))
+		goto out;
+
+	if ((attr->ia_valid & ATTR_SIZE) != 0) {
+		VERBOSE("changing %s/%s, old size=%ld, new size=%ld\n",
+			DENTRY_PATH(dentry),
+			(long) inode->i_size, (long) attr->ia_size);
+
+		filemap_write_and_wait(inode->i_mapping);
+
+		error = smb_open(dentry, O_WRONLY);
+		if (error)
+			goto out;
+		error = server->ops->truncate(inode, attr->ia_size);
+		if (error)
+			goto out;
+		error = vmtruncate(inode, attr->ia_size);
+		if (error)
+			goto out;
+		refresh = 1;
+	}
+
+	if (server->opt.capabilities & SMB_CAP_UNIX) {
+		/* For now we don't want to set the size with setattr_unix */
+		attr->ia_valid &= ~ATTR_SIZE;
+		/* FIXME: only call if we actually want to set something? */
+		error = smb_proc_setattr_unix(dentry, attr, 0, 0);
+		if (!error)
+			refresh = 1;
+
+		goto out;
+	}
+
+	/*
+	 * Initialize the fattr and check for changed fields.
+	 * Note: CTIME under SMB is creation time rather than
+	 * change time, so we don't attempt to change it.
+	 */
+	smb_get_inode_attr(inode, &fattr);
+
+	changed = 0;
+	if ((attr->ia_valid & ATTR_MTIME) != 0) {
+		fattr.f_mtime = attr->ia_mtime;
+		changed = 1;
+	}
+	if ((attr->ia_valid & ATTR_ATIME) != 0) {
+		fattr.f_atime = attr->ia_atime;
+		/* Earlier protocols don't have an access time */
+		if (server->opt.protocol >= SMB_PROTOCOL_LANMAN2)
+			changed = 1;
+	}
+	if (changed) {
+		error = smb_proc_settime(dentry, &fattr);
+		if (error)
+			goto out;
+		refresh = 1;
+	}
+
+	/*
+	 * Check for mode changes ... we're extremely limited in
+	 * what can be set for SMB servers: just the read-only bit.
+	 */
+	if ((attr->ia_valid & ATTR_MODE) != 0) {
+		VERBOSE("%s/%s mode change, old=%x, new=%x\n",
+			DENTRY_PATH(dentry), fattr.f_mode, attr->ia_mode);
+		changed = 0;
+		if (attr->ia_mode & S_IWUSR) {
+			if (fattr.attr & aRONLY) {
+				fattr.attr &= ~aRONLY;
+				changed = 1;
+			}
+		} else {
+			if (!(fattr.attr & aRONLY)) {
+				fattr.attr |= aRONLY;
+				changed = 1;
+			}
+		}
+		if (changed) {
+			error = smb_proc_setattr(dentry, &fattr);
+			if (error)
+				goto out;
+			refresh = 1;
+		}
+	}
+	error = 0;
+
+out:
+	if (refresh)
+		smb_refresh_inode(dentry);
+	unlock_kernel();
+	return error;
+}
+
+static int smb_get_sb(struct file_system_type *fs_type,
+	int flags, const char *dev_name, void *data, struct vfsmount *mnt)
+{
+	return get_sb_nodev(fs_type, flags, data, smb_fill_super, mnt);
+}
+
+static struct file_system_type smb_fs_type = {
+	.owner		= THIS_MODULE,
+	.name		= "smbfs",
+	.get_sb		= smb_get_sb,
+	.kill_sb	= kill_anon_super,
+	.fs_flags	= FS_BINARY_MOUNTDATA,
+};
+
+static int __init init_smb_fs(void)
+{
+	int err;
+	DEBUG1("registering ...\n");
+
+	err = init_inodecache();
+	if (err)
+		goto out_inode;
+	err = smb_init_request_cache();
+	if (err)
+		goto out_request;
+	err = register_filesystem(&smb_fs_type);
+	if (err)
+		goto out;
+	return 0;
+out:
+	smb_destroy_request_cache();
+out_request:
+	destroy_inodecache();
+out_inode:
+	return err;
+}
+
+static void __exit exit_smb_fs(void)
+{
+	DEBUG1("unregistering ...\n");
+	unregister_filesystem(&smb_fs_type);
+	smb_destroy_request_cache();
+	destroy_inodecache();
+}
+
+module_init(init_smb_fs)
+module_exit(exit_smb_fs)
+MODULE_LICENSE("GPL");

fs/smbfs/ioctl.c

@@ -0,0 +1,67 @@
+/*
+ *  ioctl.c
+ *
+ *  Copyright (C) 1995, 1996 by Volker Lendecke
+ *  Copyright (C) 1997 by Volker Lendecke
+ *
+ *  Please add a note about your changes to smbfs in the ChangeLog file.
+ */
+
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/ioctl.h>
+#include <linux/time.h>
+#include <linux/mm.h>
+#include <linux/highuid.h>
+#include <linux/net.h>
+
+#include <linux/smb_fs.h>
+#include <linux/smb_mount.h>
+
+#include <asm/uaccess.h>
+
+#include "proto.h"
+
+int
+smb_ioctl(struct inode *inode, struct file *filp,
+	  unsigned int cmd, unsigned long arg)
+{
+	struct smb_sb_info *server = server_from_inode(inode);
+	struct smb_conn_opt opt;
+	int result = -EINVAL;
+
+	switch (cmd) {
+		uid16_t uid16;
+		uid_t uid32;
+	case SMB_IOC_GETMOUNTUID:
+		SET_UID(uid16, server->mnt->mounted_uid);
+		result = put_user(uid16, (uid16_t __user *) arg);
+		break;
+	case SMB_IOC_GETMOUNTUID32:
+		SET_UID(uid32, server->mnt->mounted_uid);
+		result = put_user(uid32, (uid_t __user *) arg);
+		break;
+
+	case SMB_IOC_NEWCONN:
+		/* arg is smb_conn_opt, or NULL if no connection was made */
+		if (!arg) {
+			result = 0;
+			smb_lock_server(server);
+			server->state = CONN_RETRIED;
+			printk(KERN_ERR "Connection attempt failed!  [%d]\n",
+			       server->conn_error);
+			smbiod_flush(server);
+			smb_unlock_server(server);
+			break;
+		}
+
+		result = -EFAULT;
+		if (!copy_from_user(&opt, (void __user *)arg, sizeof(opt)))
+			result = smb_newconn(server, &opt);
+		break;
+	default:
+		break;
+	}
+
+	return result;
+}

fs/smbfs/proto.h

@@ -0,0 +1,87 @@
+/*
+ *  Autogenerated with cproto on:  Sat Sep 13 17:18:51 CEST 2003
+ */
+
+struct smb_request;
+struct sock;
+struct statfs;
+
+/* proc.c */
+extern int smb_setcodepage(struct smb_sb_info *server, struct smb_nls_codepage *cp);
+extern __u32 smb_len(__u8 *p);
+extern int smb_get_rsize(struct smb_sb_info *server);
+extern int smb_get_wsize(struct smb_sb_info *server);
+extern int smb_errno(struct smb_request *req);
+extern int smb_newconn(struct smb_sb_info *server, struct smb_conn_opt *opt);
+extern __u8 *smb_setup_header(struct smb_request *req, __u8 command, __u16 wct, __u16 bcc);
+extern int smb_open(struct dentry *dentry, int wish);
+extern int smb_close(struct inode *ino);
+extern int smb_close_fileid(struct dentry *dentry, __u16 fileid);
+extern int smb_proc_create(struct dentry *dentry, __u16 attr, time_t ctime, __u16 *fileid);
+extern int smb_proc_mv(struct dentry *old_dentry, struct dentry *new_dentry);
+extern int smb_proc_mkdir(struct dentry *dentry);
+extern int smb_proc_rmdir(struct dentry *dentry);
+extern int smb_proc_unlink(struct dentry *dentry);
+extern int smb_proc_flush(struct smb_sb_info *server, __u16 fileid);
+extern void smb_init_root_dirent(struct smb_sb_info *server, struct smb_fattr *fattr,
+				 struct super_block *sb);
+extern int smb_proc_getattr(struct dentry *dir, struct smb_fattr *fattr);
+extern int smb_proc_setattr(struct dentry *dir, struct smb_fattr *fattr);
+extern int smb_proc_setattr_unix(struct dentry *d, struct iattr *attr, unsigned int major, unsigned int minor);
+extern int smb_proc_settime(struct dentry *dentry, struct smb_fattr *fattr);
+extern int smb_proc_dskattr(struct dentry *dentry, struct kstatfs *attr);
+extern int smb_proc_read_link(struct smb_sb_info *server, struct dentry *d, char *buffer, int len);
+extern int smb_proc_symlink(struct smb_sb_info *server, struct dentry *d, const char *oldpath);
+extern int smb_proc_link(struct smb_sb_info *server, struct dentry *dentry, struct dentry *new_dentry);
+extern void smb_install_null_ops(struct smb_ops *ops);
+/* dir.c */
+extern const struct file_operations smb_dir_operations;
+extern const struct inode_operations smb_dir_inode_operations;
+extern const struct inode_operations smb_dir_inode_operations_unix;
+extern void smb_new_dentry(struct dentry *dentry);
+extern void smb_renew_times(struct dentry *dentry);
+/* cache.c */
+extern void smb_invalid_dir_cache(struct inode *dir);
+extern void smb_invalidate_dircache_entries(struct dentry *parent);
+extern struct dentry *smb_dget_fpos(struct dentry *dentry, struct dentry *parent, unsigned long fpos);
+extern int smb_fill_cache(struct file *filp, void *dirent, filldir_t filldir, struct smb_cache_control *ctrl, struct qstr *qname, struct smb_fattr *entry);
+/* sock.c */
+extern void smb_data_ready(struct sock *sk, int len);
+extern int smb_valid_socket(struct inode *inode);
+extern void smb_close_socket(struct smb_sb_info *server);
+extern int smb_recv_available(struct smb_sb_info *server);
+extern int smb_receive_header(struct smb_sb_info *server);
+extern int smb_receive_drop(struct smb_sb_info *server);
+extern int smb_receive(struct smb_sb_info *server, struct smb_request *req);
+extern int smb_send_request(struct smb_request *req);
+/* inode.c */
+extern struct inode *smb_iget(struct super_block *sb, struct smb_fattr *fattr);
+extern void smb_get_inode_attr(struct inode *inode, struct smb_fattr *fattr);
+extern void smb_set_inode_attr(struct inode *inode, struct smb_fattr *fattr);
+extern void smb_invalidate_inodes(struct smb_sb_info *server);
+extern int smb_revalidate_inode(struct dentry *dentry);
+extern int smb_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat);
+extern int smb_notify_change(struct dentry *dentry, struct iattr *attr);
+/* file.c */
+extern const struct address_space_operations smb_file_aops;
+extern const struct file_operations smb_file_operations;
+extern const struct inode_operations smb_file_inode_operations;
+/* ioctl.c */
+extern int smb_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg);
+/* smbiod.c */
+extern void smbiod_wake_up(void);
+extern int smbiod_register_server(struct smb_sb_info *server);
+extern void smbiod_unregister_server(struct smb_sb_info *server);
+extern void smbiod_flush(struct smb_sb_info *server);
+extern int smbiod_retry(struct smb_sb_info *server);
+/* request.c */
+extern int smb_init_request_cache(void);
+extern void smb_destroy_request_cache(void);
+extern struct smb_request *smb_alloc_request(struct smb_sb_info *server, int bufsize);
+extern void smb_rput(struct smb_request *req);
+extern int smb_add_request(struct smb_request *req);
+extern int smb_request_send_server(struct smb_sb_info *server);
+extern int smb_request_recv(struct smb_sb_info *server);
+/* symlink.c */
+extern int smb_symlink(struct inode *inode, struct dentry *dentry, const char *oldname);
+extern const struct inode_operations smb_link_inode_operations;

fs/smbfs/request.c

@@ -0,0 +1,818 @@
+/*
+ *  request.c
+ *
+ *  Copyright (C) 2001 by Urban Widmark
+ *
+ *  Please add a note about your changes to smbfs in the ChangeLog file.
+ */
+
+#include <linux/types.h>
+#include <linux/fs.h>
+#include <linux/slab.h>
+#include <linux/net.h>
+
+#include <linux/smb_fs.h>
+#include <linux/smbno.h>
+#include <linux/smb_mount.h>
+
+#include "smb_debug.h"
+#include "request.h"
+#include "proto.h"
+
+/* #define SMB_SLAB_DEBUG	(SLAB_RED_ZONE | SLAB_POISON) */
+#define SMB_SLAB_DEBUG	0
+
+#define ROUND_UP(x) (((x)+3) & ~3)
+
+/* cache for request structures */
+static struct kmem_cache *req_cachep;
+
+static int smb_request_send_req(struct smb_request *req);
+
+/*
+  /proc/slabinfo:
+  name, active, num, objsize, active_slabs, num_slaps, #pages
+*/
+
+
+int smb_init_request_cache(void)
+{
+	req_cachep = kmem_cache_create("smb_request",
+				       sizeof(struct smb_request), 0,
+				       SMB_SLAB_DEBUG | SLAB_HWCACHE_ALIGN,
+				       NULL, NULL);
+	if (req_cachep == NULL)
+		return -ENOMEM;
+
+	return 0;
+}
+
+void smb_destroy_request_cache(void)
+{
+	kmem_cache_destroy(req_cachep);
+}
+
+/*
+ * Allocate and initialise a request structure
+ */
+static struct smb_request *smb_do_alloc_request(struct smb_sb_info *server,
+						int bufsize)
+{
+	struct smb_request *req;
+	unsigned char *buf = NULL;
+
+	req = kmem_cache_zalloc(req_cachep, GFP_KERNEL);
+	VERBOSE("allocating request: %p\n", req);
+	if (!req)
+		goto out;
+
+	if (bufsize > 0) {
+		buf = kmalloc(bufsize, GFP_NOFS);
+		if (!buf) {
+			kmem_cache_free(req_cachep, req);
+			return NULL;
+		}
+	}
+
+	req->rq_buffer = buf;
+	req->rq_bufsize = bufsize;
+	req->rq_server = server;
+	init_waitqueue_head(&req->rq_wait);
+	INIT_LIST_HEAD(&req->rq_queue);
+	atomic_set(&req->rq_count, 1);
+
+out:
+	return req;
+}
+
+struct smb_request *smb_alloc_request(struct smb_sb_info *server, int bufsize)
+{
+	struct smb_request *req = NULL;
+
+	for (;;) {
+		atomic_inc(&server->nr_requests);
+		if (atomic_read(&server->nr_requests) <= MAX_REQUEST_HARD) {
+			req = smb_do_alloc_request(server, bufsize);
+			if (req != NULL)
+				break;
+		}
+
+#if 0
+		/*
+		 * Try to free up at least one request in order to stay
+		 * below the hard limit
+		 */
+                if (nfs_try_to_free_pages(server))
+			continue;
+
+		if (signalled() && (server->flags & NFS_MOUNT_INTR))
+			return ERR_PTR(-ERESTARTSYS);
+		current->policy = SCHED_YIELD;
+		schedule();
+#else
+		/* FIXME: we want something like nfs does above, but that
+		   requires changes to all callers and can wait. */
+		break;
+#endif
+	}
+	return req;
+}
+
+static void smb_free_request(struct smb_request *req)
+{
+	atomic_dec(&req->rq_server->nr_requests);
+	if (req->rq_buffer && !(req->rq_flags & SMB_REQ_STATIC))
+		kfree(req->rq_buffer);
+	kfree(req->rq_trans2buffer);
+	kmem_cache_free(req_cachep, req);
+}
+
+/*
+ * What prevents a rget to race with a rput? The count must never drop to zero
+ * while it is in use. Only rput if it is ok that it is free'd.
+ */
+static void smb_rget(struct smb_request *req)
+{
+	atomic_inc(&req->rq_count);
+}
+void smb_rput(struct smb_request *req)
+{
+	if (atomic_dec_and_test(&req->rq_count)) {
+		list_del_init(&req->rq_queue);
+		smb_free_request(req);
+	}
+}
+
+/* setup to receive the data part of the SMB */
+static int smb_setup_bcc(struct smb_request *req)
+{
+	int result = 0;
+	req->rq_rlen = smb_len(req->rq_header) + 4 - req->rq_bytes_recvd;
+
+	if (req->rq_rlen > req->rq_bufsize) {
+		PARANOIA("Packet too large %d > %d\n",
+			 req->rq_rlen, req->rq_bufsize);
+		return -ENOBUFS;
+	}
+
+	req->rq_iov[0].iov_base = req->rq_buffer;
+	req->rq_iov[0].iov_len  = req->rq_rlen;
+	req->rq_iovlen = 1;
+
+	return result;
+}
+
+/*
+ * Prepare a "normal" request structure.
+ */
+static int smb_setup_request(struct smb_request *req)
+{
+	int len = smb_len(req->rq_header) + 4;
+	req->rq_slen = len;
+
+	/* if we expect a data part in the reply we set the iov's to read it */
+	if (req->rq_resp_bcc)
+		req->rq_setup_read = smb_setup_bcc;
+
+	/* This tries to support re-using the same request */
+	req->rq_bytes_sent = 0;
+	req->rq_rcls = 0;
+	req->rq_err = 0;
+	req->rq_errno = 0;
+	req->rq_fragment = 0;
+	kfree(req->rq_trans2buffer);
+	req->rq_trans2buffer = NULL;
+
+	return 0;
+}
+
+/*
+ * Prepare a transaction2 request structure
+ */
+static int smb_setup_trans2request(struct smb_request *req)
+{
+	struct smb_sb_info *server = req->rq_server;
+	int mparam, mdata;
+	static unsigned char padding[4];
+
+	/* I know the following is very ugly, but I want to build the
+	   smb packet as efficiently as possible. */
+
+	const int smb_parameters = 15;
+	const int header = SMB_HEADER_LEN + 2 * smb_parameters + 2;
+	const int oparam = ROUND_UP(header + 3);
+	const int odata  = ROUND_UP(oparam + req->rq_lparm);
+	const int bcc = (req->rq_data ? odata + req->rq_ldata :
+					oparam + req->rq_lparm) - header;
+
+	if ((bcc + oparam) > server->opt.max_xmit)
+		return -ENOMEM;
+	smb_setup_header(req, SMBtrans2, smb_parameters, bcc);
+
+	/*
+	 * max parameters + max data + max setup == bufsize to make NT4 happy
+	 * and not abort the transfer or split into multiple responses. It also
+	 * makes smbfs happy as handling packets larger than the buffer size
+	 * is extra work.
+	 *
+	 * OS/2 is probably going to hate me for this ...
+	 */
+	mparam = SMB_TRANS2_MAX_PARAM;
+	mdata = req->rq_bufsize - mparam;
+
+	mdata = server->opt.max_xmit - mparam - 100;
+	if (mdata < 1024) {
+		mdata = 1024;
+		mparam = 20;
+	}
+
+#if 0
+	/* NT/win2k has ~4k max_xmit, so with this we request more than it wants
+	   to return as one SMB. Useful for testing the fragmented trans2
+	   handling. */
+	mdata = 8192;
+#endif
+
+	WSET(req->rq_header, smb_tpscnt, req->rq_lparm);
+	WSET(req->rq_header, smb_tdscnt, req->rq_ldata);
+	WSET(req->rq_header, smb_mprcnt, mparam);
+	WSET(req->rq_header, smb_mdrcnt, mdata);
+	WSET(req->rq_header, smb_msrcnt, 0);    /* max setup always 0 ? */
+	WSET(req->rq_header, smb_flags, 0);
+	DSET(req->rq_header, smb_timeout, 0);
+	WSET(req->rq_header, smb_pscnt, req->rq_lparm);
+	WSET(req->rq_header, smb_psoff, oparam - 4);
+	WSET(req->rq_header, smb_dscnt, req->rq_ldata);
+	WSET(req->rq_header, smb_dsoff, req->rq_data ? odata - 4 : 0);
+	*(req->rq_header + smb_suwcnt) = 0x01;          /* setup count */
+	*(req->rq_header + smb_suwcnt + 1) = 0x00;      /* reserved */
+	WSET(req->rq_header, smb_setup0, req->rq_trans2_command);
+
+	req->rq_iovlen = 2;
+	req->rq_iov[0].iov_base = (void *) req->rq_header;
+	req->rq_iov[0].iov_len = oparam;
+	req->rq_iov[1].iov_base = (req->rq_parm==NULL) ? padding : req->rq_parm;
+	req->rq_iov[1].iov_len = req->rq_lparm;
+	req->rq_slen = oparam + req->rq_lparm;
+
+	if (req->rq_data) {
+		req->rq_iovlen += 2;
+		req->rq_iov[2].iov_base = padding;
+		req->rq_iov[2].iov_len = odata - oparam - req->rq_lparm;
+		req->rq_iov[3].iov_base = req->rq_data;
+		req->rq_iov[3].iov_len = req->rq_ldata;
+		req->rq_slen = odata + req->rq_ldata;
+	}
+
+	/* always a data part for trans2 replies */
+	req->rq_setup_read = smb_setup_bcc;
+
+	return 0;
+}
+
+/*
+ * Add a request and tell smbiod to process it
+ */
+int smb_add_request(struct smb_request *req)
+{
+	long timeleft;
+	struct smb_sb_info *server = req->rq_server;
+	int result = 0;
+
+	smb_setup_request(req);
+	if (req->rq_trans2_command) {
+		if (req->rq_buffer == NULL) {
+			PARANOIA("trans2 attempted without response buffer!\n");
+			return -EIO;
+		}
+		result = smb_setup_trans2request(req);
+	}
+	if (result < 0)
+		return result;
+
+#ifdef SMB_DEBUG_PACKET_SIZE
+	add_xmit_stats(req);
+#endif
+
+	/* add 'req' to the queue of requests */
+	if (smb_lock_server_interruptible(server))
+		return -EINTR;
+
+	/*
+	 * Try to send the request as the process. If that fails we queue the
+	 * request and let smbiod send it later.
+	 */
+
+	/* FIXME: each server has a number on the maximum number of parallel
+	   requests. 10, 50 or so. We should not allow more requests to be
+	   active. */
+	if (server->mid > 0xf000)
+		server->mid = 0;
+	req->rq_mid = server->mid++;
+	WSET(req->rq_header, smb_mid, req->rq_mid);
+
+	result = 0;
+	if (server->state == CONN_VALID) {
+		if (list_empty(&server->xmitq))
+			result = smb_request_send_req(req);
+		if (result < 0) {
+			/* Connection lost? */
+			server->conn_error = result;
+			server->state = CONN_INVALID;
+		}
+	}
+	if (result != 1)
+		list_add_tail(&req->rq_queue, &server->xmitq);
+	smb_rget(req);
+
+	if (server->state != CONN_VALID)
+		smbiod_retry(server);
+
+	smb_unlock_server(server);
+
+	smbiod_wake_up();
+
+	timeleft = wait_event_interruptible_timeout(req->rq_wait,
+				    req->rq_flags & SMB_REQ_RECEIVED, 30*HZ);
+	if (!timeleft || signal_pending(current)) {
+		/*
+		 * On timeout or on interrupt we want to try and remove the
+		 * request from the recvq/xmitq.
+		 * First check if the request is still part of a queue. (May
+		 * have been removed by some error condition)
+		 */
+		smb_lock_server(server);
+		if (!list_empty(&req->rq_queue)) {
+			list_del_init(&req->rq_queue);
+			smb_rput(req);
+		}
+		smb_unlock_server(server);
+	}
+
+	if (!timeleft) {
+		PARANOIA("request [%p, mid=%d] timed out!\n",
+			 req, req->rq_mid);
+		VERBOSE("smb_com:  %02x\n", *(req->rq_header + smb_com));
+		VERBOSE("smb_rcls: %02x\n", *(req->rq_header + smb_rcls));
+		VERBOSE("smb_flg:  %02x\n", *(req->rq_header + smb_flg));
+		VERBOSE("smb_tid:  %04x\n", WVAL(req->rq_header, smb_tid));
+		VERBOSE("smb_pid:  %04x\n", WVAL(req->rq_header, smb_pid));
+		VERBOSE("smb_uid:  %04x\n", WVAL(req->rq_header, smb_uid));
+		VERBOSE("smb_mid:  %04x\n", WVAL(req->rq_header, smb_mid));
+		VERBOSE("smb_wct:  %02x\n", *(req->rq_header + smb_wct));
+
+		req->rq_rcls = ERRSRV;
+		req->rq_err  = ERRtimeout;
+
+		/* Just in case it was "stuck" */
+		smbiod_wake_up();
+	}
+	VERBOSE("woke up, rcls=%d\n", req->rq_rcls);
+
+	if (req->rq_rcls != 0)
+		req->rq_errno = smb_errno(req);
+	if (signal_pending(current))
+		req->rq_errno = -ERESTARTSYS;
+	return req->rq_errno;
+}
+
+/*
+ * Send a request and place it on the recvq if successfully sent.
+ * Must be called with the server lock held.
+ */
+static int smb_request_send_req(struct smb_request *req)
+{
+	struct smb_sb_info *server = req->rq_server;
+	int result;
+
+	if (req->rq_bytes_sent == 0) {
+		WSET(req->rq_header, smb_tid, server->opt.tid);
+		WSET(req->rq_header, smb_pid, 1);
+		WSET(req->rq_header, smb_uid, server->opt.server_uid);
+	}
+
+	result = smb_send_request(req);
+	if (result < 0 && result != -EAGAIN)
+		goto out;
+
+	result = 0;
+	if (!(req->rq_flags & SMB_REQ_TRANSMITTED))
+		goto out;
+
+	list_move_tail(&req->rq_queue, &server->recvq);
+	result = 1;
+out:
+	return result;
+}
+
+/*
+ * Sends one request for this server. (smbiod)
+ * Must be called with the server lock held.
+ * Returns: <0 on error
+ *           0 if no request could be completely sent
+ *           1 if all data for one request was sent
+ */
+int smb_request_send_server(struct smb_sb_info *server)
+{
+	struct list_head *head;
+	struct smb_request *req;
+	int result;
+
+	if (server->state != CONN_VALID)
+		return 0;
+
+	/* dequeue first request, if any */
+	req = NULL;
+	head = server->xmitq.next;
+	if (head != &server->xmitq) {
+		req = list_entry(head, struct smb_request, rq_queue);
+	}
+	if (!req)
+		return 0;
+
+	result = smb_request_send_req(req);
+	if (result < 0) {
+		server->conn_error = result;
+		list_move(&req->rq_queue, &server->xmitq);
+		result = -EIO;
+		goto out;
+	}
+
+out:
+	return result;
+}
+
+/*
+ * Try to find a request matching this "mid". Typically the first entry will
+ * be the matching one.
+ */
+static struct smb_request *find_request(struct smb_sb_info *server, int mid)
+{
+	struct list_head *tmp;
+	struct smb_request *req = NULL;
+
+	list_for_each(tmp, &server->recvq) {
+		req = list_entry(tmp, struct smb_request, rq_queue);
+		if (req->rq_mid == mid) {
+			break;
+		}
+		req = NULL;
+	}
+
+	if (!req) {
+		VERBOSE("received reply with mid %d but no request!\n",
+			WVAL(server->header, smb_mid));
+		server->rstate = SMB_RECV_DROP;
+	}
+
+	return req;
+}
+
+/*
+ * Called when we have read the smb header and believe this is a response.
+ */
+static int smb_init_request(struct smb_sb_info *server, struct smb_request *req)
+{
+	int hdrlen, wct;
+
+	memcpy(req->rq_header, server->header, SMB_HEADER_LEN);
+
+	wct = *(req->rq_header + smb_wct);
+	if (wct > 20) {	
+		PARANOIA("wct too large, %d > 20\n", wct);
+		server->rstate = SMB_RECV_DROP;
+		return 0;
+	}
+
+	req->rq_resp_wct = wct;
+	hdrlen = SMB_HEADER_LEN + wct*2 + 2;
+	VERBOSE("header length: %d   smb_wct: %2d\n", hdrlen, wct);
+
+	req->rq_bytes_recvd = SMB_HEADER_LEN;
+	req->rq_rlen = hdrlen;
+	req->rq_iov[0].iov_base = req->rq_header;
+	req->rq_iov[0].iov_len  = hdrlen;
+	req->rq_iovlen = 1;
+	server->rstate = SMB_RECV_PARAM;
+
+#ifdef SMB_DEBUG_PACKET_SIZE
+	add_recv_stats(smb_len(server->header));
+#endif
+	return 0;
+}
+
+/*
+ * Reads the SMB parameters
+ */
+static int smb_recv_param(struct smb_sb_info *server, struct smb_request *req)
+{
+	int result;
+
+	result = smb_receive(server, req);
+	if (result < 0)
+		return result;
+	if (req->rq_bytes_recvd < req->rq_rlen)
+		return 0;
+
+	VERBOSE("result: %d   smb_bcc:  %04x\n", result,
+		WVAL(req->rq_header, SMB_HEADER_LEN +
+		     (*(req->rq_header + smb_wct) * 2)));
+
+	result = 0;
+	req->rq_iov[0].iov_base = NULL;
+	req->rq_rlen = 0;
+	if (req->rq_callback)
+		req->rq_callback(req);
+	else if (req->rq_setup_read)
+		result = req->rq_setup_read(req);
+	if (result < 0) {
+		server->rstate = SMB_RECV_DROP;
+		return result;
+	}
+
+	server->rstate = req->rq_rlen > 0 ? SMB_RECV_DATA : SMB_RECV_END;
+
+	req->rq_bytes_recvd = 0;	// recvd out of the iov
+
+	VERBOSE("rlen: %d\n", req->rq_rlen);
+	if (req->rq_rlen < 0) {
+		PARANOIA("Parameters read beyond end of packet!\n");
+		server->rstate = SMB_RECV_END;
+		return -EIO;
+	}
+	return 0;
+}
+
+/*
+ * Reads the SMB data
+ */
+static int smb_recv_data(struct smb_sb_info *server, struct smb_request *req)
+{
+	int result;
+
+	result = smb_receive(server, req);
+	if (result < 0)
+		goto out;
+	if (req->rq_bytes_recvd < req->rq_rlen)
+		goto out;
+	server->rstate = SMB_RECV_END;
+out:
+	VERBOSE("result: %d\n", result);
+	return result;
+}
+
+/*
+ * Receive a transaction2 response
+ * Return: 0 if the response has been fully read
+ *         1 if there are further "fragments" to read
+ *        <0 if there is an error
+ */
+static int smb_recv_trans2(struct smb_sb_info *server, struct smb_request *req)
+{
+	unsigned char *inbuf;
+	unsigned int parm_disp, parm_offset, parm_count, parm_tot;
+	unsigned int data_disp, data_offset, data_count, data_tot;
+	int hdrlen = SMB_HEADER_LEN + req->rq_resp_wct*2 - 2;
+
+	VERBOSE("handling trans2\n");
+
+	inbuf = req->rq_header;
+	data_tot    = WVAL(inbuf, smb_tdrcnt);
+	parm_tot    = WVAL(inbuf, smb_tprcnt);
+	parm_disp   = WVAL(inbuf, smb_prdisp);
+	parm_offset = WVAL(inbuf, smb_proff);
+	parm_count  = WVAL(inbuf, smb_prcnt);
+	data_disp   = WVAL(inbuf, smb_drdisp);
+	data_offset = WVAL(inbuf, smb_droff);
+	data_count  = WVAL(inbuf, smb_drcnt);
+
+	/* Modify offset for the split header/buffer we use */
+	if (data_count || data_offset) {
+		if (unlikely(data_offset < hdrlen))
+			goto out_bad_data;
+		else
+			data_offset -= hdrlen;
+	}
+	if (parm_count || parm_offset) {
+		if (unlikely(parm_offset < hdrlen))
+			goto out_bad_parm;
+		else
+			parm_offset -= hdrlen;
+	}
+
+	if (parm_count == parm_tot && data_count == data_tot) {
+		/*
+		 * This packet has all the trans2 data.
+		 *
+		 * We setup the request so that this will be the common
+		 * case. It may be a server error to not return a
+		 * response that fits.
+		 */
+		VERBOSE("single trans2 response  "
+			"dcnt=%u, pcnt=%u, doff=%u, poff=%u\n",
+			data_count, parm_count,
+			data_offset, parm_offset);
+		req->rq_ldata = data_count;
+		req->rq_lparm = parm_count;
+		req->rq_data = req->rq_buffer + data_offset;
+		req->rq_parm = req->rq_buffer + parm_offset;
+		if (unlikely(parm_offset + parm_count > req->rq_rlen))
+			goto out_bad_parm;
+		if (unlikely(data_offset + data_count > req->rq_rlen))
+			goto out_bad_data;
+		return 0;
+	}
+
+	VERBOSE("multi trans2 response  "
+		"frag=%d, dcnt=%u, pcnt=%u, doff=%u, poff=%u\n",
+		req->rq_fragment,
+		data_count, parm_count,
+		data_offset, parm_offset);
+
+	if (!req->rq_fragment) {
+		int buf_len;
+
+		/* We got the first trans2 fragment */
+		req->rq_fragment = 1;
+		req->rq_total_data = data_tot;
+		req->rq_total_parm = parm_tot;
+		req->rq_ldata = 0;
+		req->rq_lparm = 0;
+
+		buf_len = data_tot + parm_tot;
+		if (buf_len > SMB_MAX_PACKET_SIZE)
+			goto out_too_long;
+
+		req->rq_trans2bufsize = buf_len;
+		req->rq_trans2buffer = kzalloc(buf_len, GFP_NOFS);
+		if (!req->rq_trans2buffer)
+			goto out_no_mem;
+
+		req->rq_parm = req->rq_trans2buffer;
+		req->rq_data = req->rq_trans2buffer + parm_tot;
+	} else if (unlikely(req->rq_total_data < data_tot ||
+			    req->rq_total_parm < parm_tot))
+		goto out_data_grew;
+
+	if (unlikely(parm_disp + parm_count > req->rq_total_parm ||
+		     parm_offset + parm_count > req->rq_rlen))
+		goto out_bad_parm;
+	if (unlikely(data_disp + data_count > req->rq_total_data ||
+		     data_offset + data_count > req->rq_rlen))
+		goto out_bad_data;
+
+	inbuf = req->rq_buffer;
+	memcpy(req->rq_parm + parm_disp, inbuf + parm_offset, parm_count);
+	memcpy(req->rq_data + data_disp, inbuf + data_offset, data_count);
+
+	req->rq_ldata += data_count;
+	req->rq_lparm += parm_count;
+
+	/*
+	 * Check whether we've received all of the data. Note that
+	 * we use the packet totals -- total lengths might shrink!
+	 */
+	if (req->rq_ldata >= data_tot && req->rq_lparm >= parm_tot) {
+		req->rq_ldata = data_tot;
+		req->rq_lparm = parm_tot;
+		return 0;
+	}
+	return 1;
+
+out_too_long:
+	printk(KERN_ERR "smb_trans2: data/param too long, data=%u, parm=%u\n",
+		data_tot, parm_tot);
+	goto out_EIO;
+out_no_mem:
+	printk(KERN_ERR "smb_trans2: couldn't allocate data area of %d bytes\n",
+	       req->rq_trans2bufsize);
+	req->rq_errno = -ENOMEM;
+	goto out;
+out_data_grew:
+	printk(KERN_ERR "smb_trans2: data/params grew!\n");
+	goto out_EIO;
+out_bad_parm:
+	printk(KERN_ERR "smb_trans2: invalid parms, disp=%u, cnt=%u, tot=%u, ofs=%u\n",
+	       parm_disp, parm_count, parm_tot, parm_offset);
+	goto out_EIO;
+out_bad_data:
+	printk(KERN_ERR "smb_trans2: invalid data, disp=%u, cnt=%u, tot=%u, ofs=%u\n",
+	       data_disp, data_count, data_tot, data_offset);
+out_EIO:
+	req->rq_errno = -EIO;
+out:
+	return req->rq_errno;
+}
+
+/*
+ * State machine for receiving responses. We handle the fact that we can't
+ * read the full response in one try by having states telling us how much we
+ * have read.
+ *
+ * Must be called with the server lock held (only called from smbiod).
+ *
+ * Return: <0 on error
+ */
+int smb_request_recv(struct smb_sb_info *server)
+{
+	struct smb_request *req = NULL;
+	int result = 0;
+
+	if (smb_recv_available(server) <= 0)
+		return 0;
+
+	VERBOSE("state: %d\n", server->rstate);
+	switch (server->rstate) {
+	case SMB_RECV_DROP:
+		result = smb_receive_drop(server);
+		if (result < 0)
+			break;
+		if (server->rstate == SMB_RECV_DROP)
+			break;
+		server->rstate = SMB_RECV_START;
+		/* fallthrough */
+	case SMB_RECV_START:
+		server->smb_read = 0;
+		server->rstate = SMB_RECV_HEADER;
+		/* fallthrough */
+	case SMB_RECV_HEADER:
+		result = smb_receive_header(server);
+		if (result < 0)
+			break;
+		if (server->rstate == SMB_RECV_HEADER)
+			break;
+		if (! (*(server->header + smb_flg) & SMB_FLAGS_REPLY) ) {
+			server->rstate = SMB_RECV_REQUEST;
+			break;
+		}
+		if (server->rstate != SMB_RECV_HCOMPLETE)
+			break;
+		/* fallthrough */
+	case SMB_RECV_HCOMPLETE:
+		req = find_request(server, WVAL(server->header, smb_mid));
+		if (!req)
+			break;
+		smb_init_request(server, req);
+		req->rq_rcls = *(req->rq_header + smb_rcls);
+		req->rq_err  = WVAL(req->rq_header, smb_err);
+		if (server->rstate != SMB_RECV_PARAM)
+			break;
+		/* fallthrough */
+	case SMB_RECV_PARAM:
+		if (!req)
+			req = find_request(server,WVAL(server->header,smb_mid));
+		if (!req)
+			break;
+		result = smb_recv_param(server, req);
+		if (result < 0)
+			break;
+		if (server->rstate != SMB_RECV_DATA)
+			break;
+		/* fallthrough */
+	case SMB_RECV_DATA:
+		if (!req)
+			req = find_request(server,WVAL(server->header,smb_mid));
+		if (!req)
+			break;
+		result = smb_recv_data(server, req);
+		if (result < 0)
+			break;
+		break;
+
+		/* We should never be called with any of these states */
+	case SMB_RECV_END:
+	case SMB_RECV_REQUEST:
+		BUG();
+	}
+
+	if (result < 0) {
+		/* We saw an error */
+		return result;
+	}
+
+	if (server->rstate != SMB_RECV_END)
+		return 0;
+
+	result = 0;
+	if (req->rq_trans2_command && req->rq_rcls == SUCCESS)
+		result = smb_recv_trans2(server, req);
+
+	/*
+	 * Response completely read. Drop any extra bytes sent by the server.
+	 * (Yes, servers sometimes add extra bytes to responses)
+	 */
+	VERBOSE("smb_len: %d   smb_read: %d\n",
+		server->smb_len, server->smb_read);
+	if (server->smb_read < server->smb_len)
+		smb_receive_drop(server);
+
+	server->rstate = SMB_RECV_START;
+
+	if (!result) {
+		list_del_init(&req->rq_queue);
+		req->rq_flags |= SMB_REQ_RECEIVED;
+		smb_rput(req);
+		wake_up_interruptible(&req->rq_wait);
+	}
+	return 0;
+}

fs/smbfs/request.h

@@ -0,0 +1,70 @@
+#include <linux/list.h>
+#include <linux/types.h>
+#include <linux/uio.h>
+#include <linux/wait.h>
+
+struct smb_request {
+	struct list_head rq_queue;	/* recvq or xmitq for the server */
+
+	atomic_t rq_count;
+
+	wait_queue_head_t rq_wait;
+	int rq_flags;
+	int rq_mid;	/* multiplex ID, set by request.c */
+
+	struct smb_sb_info *rq_server;
+
+	/* header + word count + parameter words + byte count */
+	unsigned char rq_header[SMB_HEADER_LEN + 20*2 + 2];
+
+	int rq_bufsize;
+	unsigned char *rq_buffer;
+
+	/* FIXME: this is not good enough for merging IO requests. */
+	unsigned char *rq_page;
+	int rq_rsize;
+
+	int rq_resp_wct;
+	int rq_resp_bcc;
+
+	int rq_rlen;
+	int rq_bytes_recvd;
+
+	int rq_slen;
+	int rq_bytes_sent;
+
+	int rq_iovlen;
+	struct kvec rq_iov[4];
+
+	int (*rq_setup_read) (struct smb_request *);
+	void (*rq_callback) (struct smb_request *);
+
+	/* ------ trans2 stuff ------ */
+
+	u16 rq_trans2_command;	/* 0 if not a trans2 request */
+	unsigned int rq_ldata;
+	unsigned char *rq_data;
+	unsigned int rq_lparm;
+	unsigned char *rq_parm;
+
+	int rq_fragment;
+	u32 rq_total_data;
+	u32 rq_total_parm;
+	int rq_trans2bufsize;
+	unsigned char *rq_trans2buffer;
+
+	/* ------ response ------ */
+
+	unsigned short rq_rcls;
+	unsigned short rq_err;
+	int rq_errno;
+};
+
+#define SMB_REQ_STATIC		0x0001	/* rq_buffer is static */
+#define SMB_REQ_NORETRY		0x0002	/* request is invalid after retry */
+
+#define SMB_REQ_TRANSMITTED	0x4000	/* all data has been sent */
+#define SMB_REQ_RECEIVED	0x8000	/* reply received, smbiod is done */
+
+#define xSMB_REQ_NOREPLY	0x0004	/* we don't want the reply (if any) */
+#define xSMB_REQ_NORECEIVER	0x0008	/* caller doesn't wait for response */

fs/smbfs/smb_debug.h

@@ -0,0 +1,34 @@
+/*
+ * Defines some debug macros for smbfs.
+ */
+
+/* This makes a dentry parent/child name pair. Useful for debugging printk's */
+#define DENTRY_PATH(dentry) \
+	(dentry)->d_parent->d_name.name,(dentry)->d_name.name
+
+/*
+ * safety checks that should never happen ???
+ * these are normally enabled.
+ */
+#ifdef SMBFS_PARANOIA
+# define PARANOIA(f, a...) printk(KERN_NOTICE "%s: " f, __FUNCTION__ , ## a)
+#else
+# define PARANOIA(f, a...) do { ; } while(0)
+#endif
+
+/* lots of debug messages */
+#ifdef SMBFS_DEBUG_VERBOSE
+# define VERBOSE(f, a...) printk(KERN_DEBUG "%s: " f, __FUNCTION__ , ## a)
+#else
+# define VERBOSE(f, a...) do { ; } while(0)
+#endif
+
+/*
+ * "normal" debug messages, but not with a normal DEBUG define ... way
+ * too common name.
+ */
+#ifdef SMBFS_DEBUG
+#define DEBUG1(f, a...) printk(KERN_DEBUG "%s: " f, __FUNCTION__ , ## a)
+#else
+#define DEBUG1(f, a...) do { ; } while(0)
+#endif

fs/smbfs/smbiod.c

@@ -0,0 +1,348 @@
+/*
+ *  smbiod.c
+ *
+ *  Copyright (C) 2000, Charles Loep / Corel Corp.
+ *  Copyright (C) 2001, Urban Widmark
+ */
+
+
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/stat.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/file.h>
+#include <linux/dcache.h>
+#include <linux/smp_lock.h>
+#include <linux/module.h>
+#include <linux/net.h>
+#include <linux/kthread.h>
+#include <net/ip.h>
+
+#include <linux/smb_fs.h>
+#include <linux/smbno.h>
+#include <linux/smb_mount.h>
+
+#include <asm/system.h>
+#include <asm/uaccess.h>
+
+#include "smb_debug.h"
+#include "request.h"
+#include "proto.h"
+
+enum smbiod_state {
+	SMBIOD_DEAD,
+	SMBIOD_STARTING,
+	SMBIOD_RUNNING,
+};
+
+static enum smbiod_state smbiod_state = SMBIOD_DEAD;
+static struct task_struct *smbiod_thread;
+static DECLARE_WAIT_QUEUE_HEAD(smbiod_wait);
+static LIST_HEAD(smb_servers);
+static DEFINE_SPINLOCK(servers_lock);
+
+#define SMBIOD_DATA_READY	(1<<0)
+static long smbiod_flags;
+
+static int smbiod(void *);
+static int smbiod_start(void);
+
+/*
+ * called when there's work for us to do
+ */
+void smbiod_wake_up(void)
+{
+	if (smbiod_state == SMBIOD_DEAD)
+		return;
+	set_bit(SMBIOD_DATA_READY, &smbiod_flags);
+	wake_up_interruptible(&smbiod_wait);
+}
+
+/*
+ * start smbiod if none is running
+ */
+static int smbiod_start(void)
+{
+	struct task_struct *tsk;
+	int err = 0;
+
+	if (smbiod_state != SMBIOD_DEAD)
+		return 0;
+	smbiod_state = SMBIOD_STARTING;
+	__module_get(THIS_MODULE);
+	spin_unlock(&servers_lock);
+	tsk = kthread_run(smbiod, NULL, "smbiod");
+	if (IS_ERR(tsk)) {
+		err = PTR_ERR(tsk);
+		module_put(THIS_MODULE);
+	}
+
+	spin_lock(&servers_lock);
+	if (err < 0) {
+		smbiod_state = SMBIOD_DEAD;
+		smbiod_thread = NULL;
+	} else {
+		smbiod_state = SMBIOD_RUNNING;
+		smbiod_thread = tsk;
+	}
+	return err;
+}
+
+/*
+ * register a server & start smbiod if necessary
+ */
+int smbiod_register_server(struct smb_sb_info *server)
+{
+	int ret;
+	spin_lock(&servers_lock);
+	list_add(&server->entry, &smb_servers);
+	VERBOSE("%p\n", server);
+	ret = smbiod_start();
+	spin_unlock(&servers_lock);
+	return ret;
+}
+
+/*
+ * Unregister a server
+ * Must be called with the server lock held.
+ */
+void smbiod_unregister_server(struct smb_sb_info *server)
+{
+	spin_lock(&servers_lock);
+	list_del_init(&server->entry);
+	VERBOSE("%p\n", server);
+	spin_unlock(&servers_lock);
+
+	smbiod_wake_up();
+	smbiod_flush(server);
+}
+
+void smbiod_flush(struct smb_sb_info *server)
+{
+	struct list_head *tmp, *n;
+	struct smb_request *req;
+
+	list_for_each_safe(tmp, n, &server->xmitq) {
+		req = list_entry(tmp, struct smb_request, rq_queue);
+		req->rq_errno = -EIO;
+		list_del_init(&req->rq_queue);
+		smb_rput(req);
+		wake_up_interruptible(&req->rq_wait);
+	}
+	list_for_each_safe(tmp, n, &server->recvq) {
+		req = list_entry(tmp, struct smb_request, rq_queue);
+		req->rq_errno = -EIO;
+		list_del_init(&req->rq_queue);
+		smb_rput(req);
+		wake_up_interruptible(&req->rq_wait);
+	}
+}
+
+/*
+ * Wake up smbmount and make it reconnect to the server.
+ * This must be called with the server locked.
+ *
+ * FIXME: add smbconnect version to this
+ */
+int smbiod_retry(struct smb_sb_info *server)
+{
+	struct list_head *head;
+	struct smb_request *req;
+	struct pid *pid = get_pid(server->conn_pid);
+	int result = 0;
+
+	VERBOSE("state: %d\n", server->state);
+	if (server->state == CONN_VALID || server->state == CONN_RETRYING)
+		goto out;
+
+	smb_invalidate_inodes(server);
+
+	/*
+	 * Some requests are meaningless after a retry, so we abort them.
+	 * One example are all requests using 'fileid' since the files are
+	 * closed on retry.
+	 */
+	head = server->xmitq.next;
+	while (head != &server->xmitq) {
+		req = list_entry(head, struct smb_request, rq_queue);
+		head = head->next;
+
+		req->rq_bytes_sent = 0;
+		if (req->rq_flags & SMB_REQ_NORETRY) {
+			VERBOSE("aborting request %p on xmitq\n", req);
+			req->rq_errno = -EIO;
+			list_del_init(&req->rq_queue);
+			smb_rput(req);
+			wake_up_interruptible(&req->rq_wait);
+		}
+	}
+
+	/*
+	 * FIXME: test the code for retrying request we already sent
+	 */
+	head = server->recvq.next;
+	while (head != &server->recvq) {
+		req = list_entry(head, struct smb_request, rq_queue);
+		head = head->next;
+#if 0
+		if (req->rq_flags & SMB_REQ_RETRY) {
+			/* must move the request to the xmitq */
+			VERBOSE("retrying request %p on recvq\n", req);
+			list_move(&req->rq_queue, &server->xmitq);
+			continue;
+		}
+#endif
+
+		VERBOSE("aborting request %p on recvq\n", req);
+		/* req->rq_rcls = ???; */ /* FIXME: set smb error code too? */
+		req->rq_errno = -EIO;
+		list_del_init(&req->rq_queue);
+		smb_rput(req);
+		wake_up_interruptible(&req->rq_wait);
+	}
+
+	smb_close_socket(server);
+
+	if (pid == 0) {
+		/* FIXME: this is fatal, umount? */
+		printk(KERN_ERR "smb_retry: no connection process\n");
+		server->state = CONN_RETRIED;
+		goto out;
+	}
+
+	/*
+	 * Change state so that only one retry per server will be started.
+	 */
+	server->state = CONN_RETRYING;
+
+	/*
+	 * Note: use the "priv" flag, as a user process may need to reconnect.
+	 */
+	result = kill_pid(pid, SIGUSR1, 1);
+	if (result) {
+		/* FIXME: this is most likely fatal, umount? */
+		printk(KERN_ERR "smb_retry: signal failed [%d]\n", result);
+		goto out;
+	}
+	VERBOSE("signalled pid %d\n", pid);
+
+	/* FIXME: The retried requests should perhaps get a "time boost". */
+
+out:
+	put_pid(pid);
+	return result;
+}
+
+/*
+ * Currently handles lockingX packets.
+ */
+static void smbiod_handle_request(struct smb_sb_info *server)
+{
+	PARANOIA("smbiod got a request ... and we don't implement oplocks!\n");
+	server->rstate = SMB_RECV_DROP;
+}
+
+/*
+ * Do some IO for one server.
+ */
+static void smbiod_doio(struct smb_sb_info *server)
+{
+	int result;
+	int maxwork = 7;
+
+	if (server->state != CONN_VALID)
+		goto out;
+
+	do {
+		result = smb_request_recv(server);
+		if (result < 0) {
+			server->state = CONN_INVALID;
+			smbiod_retry(server);
+			goto out;	/* reconnecting is slow */
+		} else if (server->rstate == SMB_RECV_REQUEST)
+			smbiod_handle_request(server);
+	} while (result > 0 && maxwork-- > 0);
+
+	/*
+	 * If there is more to read then we want to be sure to wake up again.
+	 */
+	if (server->state != CONN_VALID)
+		goto out;
+	if (smb_recv_available(server) > 0)
+		set_bit(SMBIOD_DATA_READY, &smbiod_flags);
+
+	do {
+		result = smb_request_send_server(server);
+		if (result < 0) {
+			server->state = CONN_INVALID;
+			smbiod_retry(server);
+			goto out;	/* reconnecting is slow */
+		}
+	} while (result > 0);
+
+	/*
+	 * If the last request was not sent out we want to wake up again.
+	 */
+	if (!list_empty(&server->xmitq))
+		set_bit(SMBIOD_DATA_READY, &smbiod_flags);
+
+out:
+	return;
+}
+
+/*
+ * smbiod kernel thread
+ */
+static int smbiod(void *unused)
+{
+	allow_signal(SIGKILL);
+
+	VERBOSE("SMB Kernel thread starting (%d) ...\n", current->pid);
+
+	for (;;) {
+		struct smb_sb_info *server;
+		struct list_head *pos, *n;
+
+		/* FIXME: Use poll? */
+		wait_event_interruptible(smbiod_wait,
+			 test_bit(SMBIOD_DATA_READY, &smbiod_flags));
+		if (signal_pending(current)) {
+			spin_lock(&servers_lock);
+			smbiod_state = SMBIOD_DEAD;
+			spin_unlock(&servers_lock);
+			break;
+		}
+
+		clear_bit(SMBIOD_DATA_READY, &smbiod_flags);
+
+		spin_lock(&servers_lock);
+		if (list_empty(&smb_servers)) {
+			smbiod_state = SMBIOD_DEAD;
+			spin_unlock(&servers_lock);
+			break;
+		}
+
+		list_for_each_safe(pos, n, &smb_servers) {
+			server = list_entry(pos, struct smb_sb_info, entry);
+			VERBOSE("checking server %p\n", server);
+
+			if (server->state == CONN_VALID) {
+				spin_unlock(&servers_lock);
+
+				smb_lock_server(server);
+				smbiod_doio(server);
+				smb_unlock_server(server);
+
+				spin_lock(&servers_lock);
+			}
+		}
+		spin_unlock(&servers_lock);
+	}
+
+	VERBOSE("SMB Kernel thread exiting (%d) ...\n", current->pid);
+	module_put_and_exit(0);
+}

fs/smbfs/sock.c

@@ -0,0 +1,388 @@
+/*
+ *  sock.c
+ *
+ *  Copyright (C) 1995, 1996 by Paal-Kr. Engstad and Volker Lendecke
+ *  Copyright (C) 1997 by Volker Lendecke
+ *
+ *  Please add a note about your changes to smbfs in the ChangeLog file.
+ */
+
+#include <linux/fs.h>
+#include <linux/time.h>
+#include <linux/errno.h>
+#include <linux/socket.h>
+#include <linux/fcntl.h>
+#include <linux/file.h>
+#include <linux/in.h>
+#include <linux/net.h>
+#include <linux/mm.h>
+#include <linux/netdevice.h>
+#include <linux/smp_lock.h>
+#include <linux/workqueue.h>
+#include <net/scm.h>
+#include <net/tcp_states.h>
+#include <net/ip.h>
+
+#include <linux/smb_fs.h>
+#include <linux/smb.h>
+#include <linux/smbno.h>
+
+#include <asm/uaccess.h>
+#include <asm/ioctls.h>
+
+#include "smb_debug.h"
+#include "proto.h"
+#include "request.h"
+
+
+static int
+_recvfrom(struct socket *socket, unsigned char *ubuf, int size, unsigned flags)
+{
+	struct kvec iov = {ubuf, size};
+	struct msghdr msg = {.msg_flags = flags};
+	msg.msg_flags |= MSG_DONTWAIT | MSG_NOSIGNAL;
+	return kernel_recvmsg(socket, &msg, &iov, 1, size, msg.msg_flags);
+}
+
+/*
+ * Return the server this socket belongs to
+ */
+static struct smb_sb_info *
+server_from_socket(struct socket *socket)
+{
+	return socket->sk->sk_user_data;
+}
+
+/*
+ * Called when there is data on the socket.
+ */
+void
+smb_data_ready(struct sock *sk, int len)
+{
+	struct smb_sb_info *server = server_from_socket(sk->sk_socket);
+	void (*data_ready)(struct sock *, int) = server->data_ready;
+
+	data_ready(sk, len);
+	VERBOSE("(%p, %d)\n", sk, len);
+	smbiod_wake_up();
+}
+
+int
+smb_valid_socket(struct inode * inode)
+{
+	return (inode && S_ISSOCK(inode->i_mode) && 
+		SOCKET_I(inode)->type == SOCK_STREAM);
+}
+
+static struct socket *
+server_sock(struct smb_sb_info *server)
+{
+	struct file *file;
+
+	if (server && (file = server->sock_file))
+	{
+#ifdef SMBFS_PARANOIA
+		if (!smb_valid_socket(file->f_path.dentry->d_inode))
+			PARANOIA("bad socket!\n");
+#endif
+		return SOCKET_I(file->f_path.dentry->d_inode);
+	}
+	return NULL;
+}
+
+void
+smb_close_socket(struct smb_sb_info *server)
+{
+	struct file * file = server->sock_file;
+
+	if (file) {
+		struct socket *sock = server_sock(server);
+
+		VERBOSE("closing socket %p\n", sock);
+		sock->sk->sk_data_ready = server->data_ready;
+		server->sock_file = NULL;
+		fput(file);
+	}
+}
+
+static int
+smb_get_length(struct socket *socket, unsigned char *header)
+{
+	int result;
+
+	result = _recvfrom(socket, header, 4, MSG_PEEK);
+	if (result == -EAGAIN)
+		return -ENODATA;
+	if (result < 0) {
+		PARANOIA("recv error = %d\n", -result);
+		return result;
+	}
+	if (result < 4)
+		return -ENODATA;
+
+	switch (header[0]) {
+	case 0x00:
+	case 0x82:
+		break;
+
+	case 0x85:
+		DEBUG1("Got SESSION KEEP ALIVE\n");
+		_recvfrom(socket, header, 4, 0);	/* read away */
+		return -ENODATA;
+
+	default:
+		PARANOIA("Invalid NBT packet, code=%x\n", header[0]);
+		return -EIO;
+	}
+
+	/* The length in the RFC NB header is the raw data length */
+	return smb_len(header);
+}
+
+int
+smb_recv_available(struct smb_sb_info *server)
+{
+	mm_segment_t oldfs;
+	int avail, err;
+	struct socket *sock = server_sock(server);
+
+	oldfs = get_fs();
+	set_fs(get_ds());
+	err = sock->ops->ioctl(sock, SIOCINQ, (unsigned long) &avail);
+	set_fs(oldfs);
+	return (err >= 0) ? avail : err;
+}
+
+/*
+ * Adjust the kvec to move on 'n' bytes (from nfs/sunrpc)
+ */
+static int
+smb_move_iov(struct kvec **data, size_t *num, struct kvec *vec, unsigned amount)
+{
+	struct kvec *iv = *data;
+	int i;
+	int len;
+
+	/*
+	 *	Eat any sent kvecs
+	 */
+	while (iv->iov_len <= amount) {
+		amount -= iv->iov_len;
+		iv++;
+		(*num)--;
+	}
+
+	/*
+	 *	And chew down the partial one
+	 */
+	vec[0].iov_len = iv->iov_len-amount;
+	vec[0].iov_base =((unsigned char *)iv->iov_base)+amount;
+	iv++;
+
+	len = vec[0].iov_len;
+
+	/*
+	 *	And copy any others
+	 */
+	for (i = 1; i < *num; i++) {
+		vec[i] = *iv++;
+		len += vec[i].iov_len;
+	}
+
+	*data = vec;
+	return len;
+}
+
+/*
+ * smb_receive_header
+ * Only called by the smbiod thread.
+ */
+int
+smb_receive_header(struct smb_sb_info *server)
+{
+	struct socket *sock;
+	int result = 0;
+	unsigned char peek_buf[4];
+
+	result = -EIO; 
+	sock = server_sock(server);
+	if (!sock)
+		goto out;
+	if (sock->sk->sk_state != TCP_ESTABLISHED)
+		goto out;
+
+	if (!server->smb_read) {
+		result = smb_get_length(sock, peek_buf);
+		if (result < 0) {
+			if (result == -ENODATA)
+				result = 0;
+			goto out;
+		}
+		server->smb_len = result + 4;
+
+		if (server->smb_len < SMB_HEADER_LEN) {
+			PARANOIA("short packet: %d\n", result);
+			server->rstate = SMB_RECV_DROP;
+			result = -EIO;
+			goto out;
+		}
+		if (server->smb_len > SMB_MAX_PACKET_SIZE) {
+			PARANOIA("long packet: %d\n", result);
+			server->rstate = SMB_RECV_DROP;
+			result = -EIO;
+			goto out;
+		}
+	}
+
+	result = _recvfrom(sock, server->header + server->smb_read,
+			   SMB_HEADER_LEN - server->smb_read, 0);
+	VERBOSE("_recvfrom: %d\n", result);
+	if (result < 0) {
+		VERBOSE("receive error: %d\n", result);
+		goto out;
+	}
+	server->smb_read += result;
+
+	if (server->smb_read == SMB_HEADER_LEN)
+		server->rstate = SMB_RECV_HCOMPLETE;
+out:
+	return result;
+}
+
+static char drop_buffer[PAGE_SIZE];
+
+/*
+ * smb_receive_drop - read and throw away the data
+ * Only called by the smbiod thread.
+ *
+ * FIXME: we are in the kernel, could we just tell the socket that we want
+ * to drop stuff from the buffer?
+ */
+int
+smb_receive_drop(struct smb_sb_info *server)
+{
+	struct socket *sock;
+	unsigned int flags;
+	struct kvec iov;
+	struct msghdr msg;
+	int rlen = smb_len(server->header) - server->smb_read + 4;
+	int result = -EIO;
+
+	if (rlen > PAGE_SIZE)
+		rlen = PAGE_SIZE;
+
+	sock = server_sock(server);
+	if (!sock)
+		goto out;
+	if (sock->sk->sk_state != TCP_ESTABLISHED)
+		goto out;
+
+	flags = MSG_DONTWAIT | MSG_NOSIGNAL;
+	iov.iov_base = drop_buffer;
+	iov.iov_len = PAGE_SIZE;
+	msg.msg_flags = flags;
+	msg.msg_name = NULL;
+	msg.msg_namelen = 0;
+	msg.msg_control = NULL;
+
+	result = kernel_recvmsg(sock, &msg, &iov, 1, rlen, flags);
+
+	VERBOSE("read: %d\n", result);
+	if (result < 0) {
+		VERBOSE("receive error: %d\n", result);
+		goto out;
+	}
+	server->smb_read += result;
+
+	if (server->smb_read >= server->smb_len)
+		server->rstate = SMB_RECV_END;
+
+out:
+	return result;
+}
+
+/*
+ * smb_receive
+ * Only called by the smbiod thread.
+ */
+int
+smb_receive(struct smb_sb_info *server, struct smb_request *req)
+{
+	struct socket *sock;
+	unsigned int flags;
+	struct kvec iov[4];
+	struct kvec *p = req->rq_iov;
+	size_t num = req->rq_iovlen;
+	struct msghdr msg;
+	int rlen;
+	int result = -EIO;
+
+	sock = server_sock(server);
+	if (!sock)
+		goto out;
+	if (sock->sk->sk_state != TCP_ESTABLISHED)
+		goto out;
+
+	flags = MSG_DONTWAIT | MSG_NOSIGNAL;
+	msg.msg_flags = flags;
+	msg.msg_name = NULL;
+	msg.msg_namelen = 0;
+	msg.msg_control = NULL;
+
+	/* Dont repeat bytes and count available bufferspace */
+	rlen = smb_move_iov(&p, &num, iov, req->rq_bytes_recvd);
+	if (req->rq_rlen < rlen)
+		rlen = req->rq_rlen;
+
+	result = kernel_recvmsg(sock, &msg, p, num, rlen, flags);
+
+	VERBOSE("read: %d\n", result);
+	if (result < 0) {
+		VERBOSE("receive error: %d\n", result);
+		goto out;
+	}
+	req->rq_bytes_recvd += result;
+	server->smb_read += result;
+
+out:
+	return result;
+}
+
+/*
+ * Try to send a SMB request. This may return after sending only parts of the
+ * request. SMB_REQ_TRANSMITTED will be set if a request was fully sent.
+ *
+ * Parts of this was taken from xprt_sendmsg from net/sunrpc/xprt.c
+ */
+int
+smb_send_request(struct smb_request *req)
+{
+	struct smb_sb_info *server = req->rq_server;
+	struct socket *sock;
+	struct msghdr msg = {.msg_flags = MSG_NOSIGNAL | MSG_DONTWAIT};
+        int slen = req->rq_slen - req->rq_bytes_sent;
+	int result = -EIO;
+	struct kvec iov[4];
+	struct kvec *p = req->rq_iov;
+	size_t num = req->rq_iovlen;
+
+	sock = server_sock(server);
+	if (!sock)
+		goto out;
+	if (sock->sk->sk_state != TCP_ESTABLISHED)
+		goto out;
+
+	/* Dont repeat bytes */
+	if (req->rq_bytes_sent)
+		smb_move_iov(&p, &num, iov, req->rq_bytes_sent);
+
+	result = kernel_sendmsg(sock, &msg, p, num, slen);
+
+	if (result >= 0) {
+		req->rq_bytes_sent += result;
+		if (req->rq_bytes_sent >= req->rq_slen)
+			req->rq_flags |= SMB_REQ_TRANSMITTED;
+	}
+out:
+	return result;
+}

fs/smbfs/symlink.c

@@ -0,0 +1,69 @@
+/*
+ *  symlink.c
+ *
+ *  Copyright (C) 2002 by John Newbigin
+ *
+ *  Please add a note about your changes to smbfs in the ChangeLog file.
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/fcntl.h>
+#include <linux/stat.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/pagemap.h>
+#include <linux/smp_lock.h>
+#include <linux/net.h>
+#include <linux/namei.h>
+
+#include <asm/uaccess.h>
+#include <asm/system.h>
+
+#include <linux/smbno.h>
+#include <linux/smb_fs.h>
+
+#include "smb_debug.h"
+#include "proto.h"
+
+int smb_symlink(struct inode *inode, struct dentry *dentry, const char *oldname)
+{
+	DEBUG1("create symlink %s -> %s/%s\n", oldname, DENTRY_PATH(dentry));
+
+	return smb_proc_symlink(server_from_dentry(dentry), dentry, oldname);
+}
+
+static void *smb_follow_link(struct dentry *dentry, struct nameidata *nd)
+{
+	char *link = __getname();
+	DEBUG1("followlink of %s/%s\n", DENTRY_PATH(dentry));
+
+	if (!link) {
+		link = ERR_PTR(-ENOMEM);
+	} else {
+		int len = smb_proc_read_link(server_from_dentry(dentry),
+						dentry, link, PATH_MAX - 1);
+		if (len < 0) {
+			__putname(link);
+			link = ERR_PTR(len);
+		} else {
+			link[len] = 0;
+		}
+	}
+	nd_set_link(nd, link);
+	return NULL;
+}
+
+static void smb_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
+{
+	char *s = nd_get_link(nd);
+	if (!IS_ERR(s))
+		__putname(s);
+}
+
+const struct inode_operations smb_link_inode_operations =
+{
+	.readlink	= generic_readlink,
+	.follow_link	= smb_follow_link,
+	.put_link	= smb_put_link,
+};