Merge branch 'master' of /home/trondmy/kernel/linux-2.6/ into merge_linus

5 files changed, 155 insertions, 23 deletions

diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index 66571ea..357764d 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -19,7 +19,7 @@
 
 MODULE_ALIAS_MISCDEV(FUSE_MINOR);
 
-static kmem_cache_t *fuse_req_cachep;
+static struct kmem_cache *fuse_req_cachep;
 
 static struct fuse_conn *fuse_get_conn(struct file *file)
 {
@@ -41,7 +41,7 @@ static void fuse_request_init(struct fuse_req *req)
 
 struct fuse_req *fuse_request_alloc(void)
 {
-	struct fuse_req *req = kmem_cache_alloc(fuse_req_cachep, SLAB_KERNEL);
+	struct fuse_req *req = kmem_cache_alloc(fuse_req_cachep, GFP_KERNEL);
 	if (req)
 		fuse_request_init(req);
 	return req;
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index c71a6c0..1cabdb2 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -141,9 +141,6 @@ static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd)
 		struct fuse_req *forget_req;
 		struct dentry *parent;
 
-		/* Doesn't hurt to "reset" the validity timeout */
-		fuse_invalidate_entry_cache(entry);
-
 		/* For negative dentries, always do a fresh lookup */
 		if (!inode)
 			return 0;
@@ -1027,6 +1024,8 @@ static int fuse_setattr(struct dentry *entry, struct iattr *attr)
 	if (attr->ia_valid & ATTR_SIZE) {
 		unsigned long limit;
 		is_truncate = 1;
+		if (IS_SWAPFILE(inode))
+			return -ETXTBSY;
 		limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
 		if (limit != RLIM_INFINITY && attr->ia_size > (loff_t) limit) {
 			send_sig(SIGXFSZ, current, 0);
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 763a50d..128f79c 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -754,6 +754,42 @@ static int fuse_file_lock(struct file *file, int cmd, struct file_lock *fl)
 	return err;
 }
 
+static sector_t fuse_bmap(struct address_space *mapping, sector_t block)
+{
+	struct inode *inode = mapping->host;
+	struct fuse_conn *fc = get_fuse_conn(inode);
+	struct fuse_req *req;
+	struct fuse_bmap_in inarg;
+	struct fuse_bmap_out outarg;
+	int err;
+
+	if (!inode->i_sb->s_bdev || fc->no_bmap)
+		return 0;
+
+	req = fuse_get_req(fc);
+	if (IS_ERR(req))
+		return 0;
+
+	memset(&inarg, 0, sizeof(inarg));
+	inarg.block = block;
+	inarg.blocksize = inode->i_sb->s_blocksize;
+	req->in.h.opcode = FUSE_BMAP;
+	req->in.h.nodeid = get_node_id(inode);
+	req->in.numargs = 1;
+	req->in.args[0].size = sizeof(inarg);
+	req->in.args[0].value = &inarg;
+	req->out.numargs = 1;
+	req->out.args[0].size = sizeof(outarg);
+	req->out.args[0].value = &outarg;
+	request_send(fc, req);
+	err = req->out.h.error;
+	fuse_put_request(fc, req);
+	if (err == -ENOSYS)
+		fc->no_bmap = 1;
+
+	return err ? 0 : outarg.block;
+}
+
 static const struct file_operations fuse_file_operations = {
 	.llseek		= generic_file_llseek,
 	.read		= do_sync_read,
@@ -787,6 +823,7 @@ static const struct address_space_operations fuse_file_aops  = {
 	.commit_write	= fuse_commit_write,
 	.readpages	= fuse_readpages,
 	.set_page_dirty	= fuse_set_page_dirty,
+	.bmap		= fuse_bmap,
 };
 
 void fuse_init_file_inode(struct inode *inode)
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index 91edb89..b98b20d 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -298,6 +298,9 @@ struct fuse_conn {
 	    reply, before any other request, and never cleared */
 	unsigned conn_error : 1;
 
+	/** Connection successful.  Only set in INIT */
+	unsigned conn_init : 1;
+
 	/** Do readpages asynchronously?  Only set in INIT */
 	unsigned async_read : 1;
 
@@ -339,6 +342,9 @@ struct fuse_conn {
 	/** Is interrupt not implemented by fs? */
 	unsigned no_interrupt : 1;
 
+	/** Is bmap not implemented by fs? */
+	unsigned no_bmap : 1;
+
 	/** The number of requests waiting for completion */
 	atomic_t num_waiting;
 
@@ -365,6 +371,9 @@ struct fuse_conn {
 
 	/** Key for lock owner ID scrambling */
 	u32 scramble_key[4];
+
+	/** Reserved request for the DESTROY message */
+	struct fuse_req *destroy_req;
 };
 
 static inline struct fuse_conn *get_fuse_conn_super(struct super_block *sb)
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index fc42035..12450d2 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -22,7 +22,7 @@ MODULE_AUTHOR("Miklos Szeredi <miklos@szeredi.hu>");
 MODULE_DESCRIPTION("Filesystem in Userspace");
 MODULE_LICENSE("GPL");
 
-static kmem_cache_t *fuse_inode_cachep;
+static struct kmem_cache *fuse_inode_cachep;
 struct list_head fuse_conn_list;
 DEFINE_MUTEX(fuse_mutex);
 
@@ -39,6 +39,7 @@ struct fuse_mount_data {
 	unsigned group_id_present : 1;
 	unsigned flags;
 	unsigned max_read;
+	unsigned blksize;
 };
 
 static struct inode *fuse_alloc_inode(struct super_block *sb)
@@ -46,7 +47,7 @@ static struct inode *fuse_alloc_inode(struct super_block *sb)
 	struct inode *inode;
 	struct fuse_inode *fi;
 
-	inode = kmem_cache_alloc(fuse_inode_cachep, SLAB_KERNEL);
+	inode = kmem_cache_alloc(fuse_inode_cachep, GFP_KERNEL);
 	if (!inode)
 		return NULL;
 
@@ -205,10 +206,23 @@ static void fuse_umount_begin(struct vfsmount *vfsmnt, int flags)
 		fuse_abort_conn(get_fuse_conn_super(vfsmnt->mnt_sb));
 }
 
+static void fuse_send_destroy(struct fuse_conn *fc)
+{
+	struct fuse_req *req = fc->destroy_req;
+	if (req && fc->conn_init) {
+		fc->destroy_req = NULL;
+		req->in.h.opcode = FUSE_DESTROY;
+		req->force = 1;
+		request_send(fc, req);
+		fuse_put_request(fc, req);
+	}
+}
+
 static void fuse_put_super(struct super_block *sb)
 {
 	struct fuse_conn *fc = get_fuse_conn_super(sb);
 
+	fuse_send_destroy(fc);
 	spin_lock(&fc->lock);
 	fc->connected = 0;
 	fc->blocked = 0;
@@ -274,6 +288,7 @@ enum {
 	OPT_DEFAULT_PERMISSIONS,
 	OPT_ALLOW_OTHER,
 	OPT_MAX_READ,
+	OPT_BLKSIZE,
 	OPT_ERR
 };
 
@@ -285,14 +300,16 @@ static match_table_t tokens = {
 	{OPT_DEFAULT_PERMISSIONS,	"default_permissions"},
 	{OPT_ALLOW_OTHER,		"allow_other"},
 	{OPT_MAX_READ,			"max_read=%u"},
+	{OPT_BLKSIZE,			"blksize=%u"},
 	{OPT_ERR,			NULL}
 };
 
-static int parse_fuse_opt(char *opt, struct fuse_mount_data *d)
+static int parse_fuse_opt(char *opt, struct fuse_mount_data *d, int is_bdev)
 {
 	char *p;
 	memset(d, 0, sizeof(struct fuse_mount_data));
 	d->max_read = ~0;
+	d->blksize = 512;
 
 	while ((p = strsep(&opt, ",")) != NULL) {
 		int token;
@@ -345,6 +362,12 @@ static int parse_fuse_opt(char *opt, struct fuse_mount_data *d)
 			d->max_read = value;
 			break;
 
+		case OPT_BLKSIZE:
+			if (!is_bdev || match_int(&args[0], &value))
+				return 0;
+			d->blksize = value;
+			break;
+
 		default:
 			return 0;
 		}
@@ -400,6 +423,8 @@ static struct fuse_conn *new_conn(void)
 void fuse_conn_put(struct fuse_conn *fc)
 {
 	if (atomic_dec_and_test(&fc->count)) {
+		if (fc->destroy_req)
+			fuse_request_free(fc->destroy_req);
 		mutex_destroy(&fc->inst_mutex);
 		kfree(fc);
 	}
@@ -456,6 +481,7 @@ static void process_init_reply(struct fuse_conn *fc, struct fuse_req *req)
 		fc->bdi.ra_pages = min(fc->bdi.ra_pages, ra_pages);
 		fc->minor = arg->minor;
 		fc->max_write = arg->minor < 5 ? 4096 : arg->max_write;
+		fc->conn_init = 1;
 	}
 	fuse_put_request(fc, req);
 	fc->blocked = 0;
@@ -500,15 +526,23 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
 	struct dentry *root_dentry;
 	struct fuse_req *init_req;
 	int err;
+	int is_bdev = sb->s_bdev != NULL;
 
 	if (sb->s_flags & MS_MANDLOCK)
 		return -EINVAL;
 
-	if (!parse_fuse_opt((char *) data, &d))
+	if (!parse_fuse_opt((char *) data, &d, is_bdev))
 		return -EINVAL;
 
-	sb->s_blocksize = PAGE_CACHE_SIZE;
-	sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
+	if (is_bdev) {
+#ifdef CONFIG_BLOCK
+		if (!sb_set_blocksize(sb, d.blksize))
+			return -EINVAL;
+#endif
+	} else {
+		sb->s_blocksize = PAGE_CACHE_SIZE;
+		sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
+	}
 	sb->s_magic = FUSE_SUPER_MAGIC;
 	sb->s_op = &fuse_super_operations;
 	sb->s_maxbytes = MAX_LFS_FILESIZE;
@@ -547,6 +581,12 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
 	if (!init_req)
 		goto err_put_root;
 
+	if (is_bdev) {
+		fc->destroy_req = fuse_request_alloc();
+		if (!fc->destroy_req)
+			goto err_put_root;
+	}
+
 	mutex_lock(&fuse_mutex);
 	err = -EINVAL;
 	if (file->private_data)
@@ -598,10 +638,47 @@ static struct file_system_type fuse_fs_type = {
 	.kill_sb	= kill_anon_super,
 };
 
+#ifdef CONFIG_BLOCK
+static int fuse_get_sb_blk(struct file_system_type *fs_type,
+			   int flags, const char *dev_name,
+			   void *raw_data, struct vfsmount *mnt)
+{
+	return get_sb_bdev(fs_type, flags, dev_name, raw_data, fuse_fill_super,
+			   mnt);
+}
+
+static struct file_system_type fuseblk_fs_type = {
+	.owner		= THIS_MODULE,
+	.name		= "fuseblk",
+	.get_sb		= fuse_get_sb_blk,
+	.kill_sb	= kill_block_super,
+	.fs_flags	= FS_REQUIRES_DEV,
+};
+
+static inline int register_fuseblk(void)
+{
+	return register_filesystem(&fuseblk_fs_type);
+}
+
+static inline void unregister_fuseblk(void)
+{
+	unregister_filesystem(&fuseblk_fs_type);
+}
+#else
+static inline int register_fuseblk(void)
+{
+	return 0;
+}
+
+static inline void unregister_fuseblk(void)
+{
+}
+#endif
+
 static decl_subsys(fuse, NULL, NULL);
 static decl_subsys(connections, NULL, NULL);
 
-static void fuse_inode_init_once(void *foo, kmem_cache_t *cachep,
+static void fuse_inode_init_once(void *foo, struct kmem_cache *cachep,
 				 unsigned long flags)
 {
 	struct inode * inode = foo;
@@ -617,24 +694,34 @@ static int __init fuse_fs_init(void)
 
 	err = register_filesystem(&fuse_fs_type);
 	if (err)
-		printk("fuse: failed to register filesystem\n");
-	else {
-		fuse_inode_cachep = kmem_cache_create("fuse_inode",
-						      sizeof(struct fuse_inode),
-						      0, SLAB_HWCACHE_ALIGN,
-						      fuse_inode_init_once, NULL);
-		if (!fuse_inode_cachep) {
-			unregister_filesystem(&fuse_fs_type);
-			err = -ENOMEM;
-		}
-	}
+		goto out;
 
+	err = register_fuseblk();
+	if (err)
+		goto out_unreg;
+
+	fuse_inode_cachep = kmem_cache_create("fuse_inode",
+					      sizeof(struct fuse_inode),
+					      0, SLAB_HWCACHE_ALIGN,
+					      fuse_inode_init_once, NULL);
+	err = -ENOMEM;
+	if (!fuse_inode_cachep)
+		goto out_unreg2;
+
+	return 0;
+
+ out_unreg2:
+	unregister_fuseblk();
+ out_unreg:
+	unregister_filesystem(&fuse_fs_type);
+ out:
 	return err;
 }
 
 static void fuse_fs_cleanup(void)
 {
 	unregister_filesystem(&fuse_fs_type);
+	unregister_fuseblk();
 	kmem_cache_destroy(fuse_inode_cachep);
 }