Merge 'staging-next' to Linus's tree

This merges the staging-next tree to Linus's tree and resolves
some conflicts that were present due to changes in other trees that were
affected by files here.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 843 insertions, 0 deletions

diff --git a/drivers/staging/smbfs/inode.c b/drivers/staging/smbfs/inode.c
new file mode 100644
index 000000000000..552951aa7498
--- /dev/null
+++ b/drivers/staging/smbfs/inode.c
@@ -0,0 +1,843 @@
+/*
+ *  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/sched.h>
+
+#include <asm/system.h>
+#include <asm/uaccess.h>
+
+#include "smb_fs.h"
+#include "smbno.h"
+#include "smb_mount.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_evict_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 smb_inode_info *ei = (struct smb_inode_info *) foo;
+
+	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);
+	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,
+	.evict_inode	= smb_evict_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));
+}
+
+/*
+ * 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_evict_inode(struct inode *ino)
+{
+	DEBUG1("ino=%ld\n", ino->i_ino);
+	truncate_inode_pages(&ino->i_data, 0);
+	end_writeback(ino);
+	lock_kernel();
+	if (smb_close(ino))
+		PARANOIA("could not close inode %ld\n", ino->i_ino);
+	unlock_kernel();
+}
+
+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)
+{
+	unload_nls(server->remote_nls);
+	unload_nls(server->local_nls);
+}
+
+static void
+smb_put_super(struct super_block *sb)
+{
+	struct smb_sb_info *server = SMB_SB(sb);
+
+	lock_kernel();
+
+	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);
+
+	bdi_destroy(&server->bdi);
+	kfree(server->ops);
+	smb_unload_nls(server);
+	sb->s_fs_info = NULL;
+	smb_unlock_server(server);
+	put_pid(server->conn_pid);
+	kfree(server);
+
+	unlock_kernel();
+}
+
+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;
+	static int warn_count;
+
+	lock_kernel();
+
+	if (warn_count < 5) {
+		warn_count++;
+		printk(KERN_EMERG "smbfs is deprecated and will be removed"
+			" from the 2.6.37 kernel. Please migrate to cifs\n");
+	}
+
+	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;
+	
+	if (bdi_setup_and_register(&server->bdi, "smbfs", BDI_CAP_MAP_COPY))
+		goto out_bdi;
+
+	sb->s_bdi = &server->bdi;
+
+	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 = %lu\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);
+
+	unlock_kernel();
+	return 0;
+
+out_no_root:
+	iput(root_inode);
+out_no_smbiod:
+	smb_unload_nls(server);
+out_bad_option:
+	kfree(mem);
+out_no_mem:
+	bdi_destroy(&server->bdi);
+out_bdi:
+	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:
+	unlock_kernel();
+	return -EINVAL;
+out_no_server:
+	printk(KERN_ERR "smb_fill_super: cannot allocate struct smb_sb_info\n");
+	unlock_kernel();
+	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;
+		truncate_setsize(inode, attr->ia_size);
+		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");