Import of Linux/MIPS 2.1.14

1 files changed, 474 insertions, 0 deletions

diff --git a/fs/smbfs/inode.c b/fs/smbfs/inode.c
new file mode 100644
index 000000000..b39403358
--- /dev/null
+++ b/fs/smbfs/inode.c
@@ -0,0 +1,474 @@
+/*
+ *  inode.c
+ *
+ *  Copyright (C) 1995, 1996 by Paal-Kr. Engstad and Volker Lendecke
+ *
+ */
+
+#include <linux/module.h>
+
+#include <linux/sched.h>
+#include <linux/smb_fs.h>
+#include <linux/smbno.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/stat.h>
+#include <linux/errno.h>
+#include <linux/locks.h>
+#include <linux/fcntl.h>
+#include <linux/malloc.h>
+
+#include <asm/system.h>
+#include <asm/uaccess.h>
+
+extern int close_fp(struct file *filp);
+
+static void smb_put_inode(struct inode *);
+static void smb_read_inode(struct inode *);
+static void smb_put_super(struct super_block *);
+static void smb_statfs(struct super_block *, struct statfs *, int bufsiz);
+
+static struct super_operations smb_sops =
+{
+	smb_read_inode,		/* read inode */
+	smb_notify_change,	/* notify change */
+	NULL,			/* write inode */
+	smb_put_inode,		/* put inode */
+	smb_put_super,		/* put superblock */
+	NULL,			/* write superblock */
+	smb_statfs,		/* stat filesystem */
+	NULL
+};
+
+/* smb_read_inode: Called from iget, it only traverses the allocated
+   smb_inode_info's and initializes the inode from the data found
+   there.  It does not allocate or deallocate anything. */
+
+static void
+smb_read_inode(struct inode *inode)
+{
+	/* Our task should be extremely simple here. We only have to
+	   look up the information somebody else (smb_iget) put into
+	   the inode tree. */
+	struct smb_server *server = SMB_SERVER(inode);
+	struct smb_inode_info *inode_info
+	= smb_find_inode(server, inode->i_ino);
+
+	if (inode_info == NULL)
+	{
+		/* Ok, now we're in trouble. The inode info is not
+		   there. What should we do now??? */
+		printk("smb_read_inode: inode info not found\n");
+		return;
+	}
+	inode_info->state = SMB_INODE_VALID;
+
+	SMB_INOP(inode) = inode_info;
+	inode->i_mode = inode_info->finfo.f_mode;
+	inode->i_nlink = inode_info->finfo.f_nlink;
+	inode->i_uid = inode_info->finfo.f_uid;
+	inode->i_gid = inode_info->finfo.f_gid;
+	inode->i_rdev = inode_info->finfo.f_rdev;
+	inode->i_size = inode_info->finfo.f_size;
+	inode->i_mtime = inode_info->finfo.f_mtime;
+	inode->i_ctime = inode_info->finfo.f_ctime;
+	inode->i_atime = inode_info->finfo.f_atime;
+	inode->i_blksize = inode_info->finfo.f_blksize;
+	inode->i_blocks = inode_info->finfo.f_blocks;
+
+	if (S_ISREG(inode->i_mode))
+	{
+		inode->i_op = &smb_file_inode_operations;
+	} else if (S_ISDIR(inode->i_mode))
+	{
+		inode->i_op = &smb_dir_inode_operations;
+	} else
+	{
+		inode->i_op = NULL;
+	}
+}
+
+static void
+smb_put_inode(struct inode *inode)
+{
+	struct smb_dirent *finfo = SMB_FINFO(inode);
+	struct smb_server *server = SMB_SERVER(inode);
+	struct smb_inode_info *info = SMB_INOP(inode);
+
+	if (S_ISDIR(inode->i_mode))
+	{
+		smb_invalid_dir_cache(inode->i_ino);
+	}
+	if (finfo->opened != 0)
+	{
+		if (smb_proc_close(server, finfo->fileid, inode->i_mtime))
+		{
+			/* We can't do anything but complain. */
+			DPRINTK("smb_put_inode: could not close\n");
+		}
+	}
+	smb_free_inode_info(info);
+	clear_inode(inode);
+}
+
+static void
+smb_put_super(struct super_block *sb)
+{
+	struct smb_server *server = &(SMB_SBP(sb)->s_server);
+
+	smb_proc_disconnect(server);
+	smb_dont_catch_keepalive(server);
+	close_fp(server->sock_file);
+
+	lock_super(sb);
+
+	smb_free_all_inodes(server);
+
+	smb_vfree(server->packet);
+	server->packet = NULL;
+
+	sb->s_dev = 0;
+	smb_kfree_s(SMB_SBP(sb), sizeof(struct smb_sb_info));
+
+	unlock_super(sb);
+
+	MOD_DEC_USE_COUNT;
+}
+
+struct smb_mount_data_v4
+{
+	int version;
+	unsigned int fd;
+	uid_t mounted_uid;
+	struct sockaddr_in addr;
+
+	char server_name[17];
+	char client_name[17];
+	char service[64];
+	char root_path[64];
+
+	char username[64];
+	char password[64];
+
+	unsigned short max_xmit;
+
+	uid_t uid;
+	gid_t gid;
+	mode_t file_mode;
+	mode_t dir_mode;
+};
+
+static int
+smb_get_mount_data(struct smb_mount_data *target, void *source)
+{
+	struct smb_mount_data_v4 *v4 = (struct smb_mount_data_v4 *) source;
+	struct smb_mount_data *cur = (struct smb_mount_data *) source;
+
+	if (source == NULL)
+	{
+		return 1;
+	}
+	if (cur->version == SMB_MOUNT_VERSION)
+	{
+		memcpy(target, cur, sizeof(struct smb_mount_data));
+		return 0;
+	}
+	if (v4->version == 4)
+	{
+		target->version = 5;
+		target->fd = v4->fd;
+		target->mounted_uid = v4->mounted_uid;
+		target->addr = v4->addr;
+
+		memcpy(target->server_name, v4->server_name, 17);
+		memcpy(target->client_name, v4->client_name, 17);
+		memcpy(target->service, v4->service, 64);
+		memcpy(target->root_path, v4->root_path, 64);
+		memcpy(target->username, v4->username, 64);
+		memcpy(target->password, v4->password, 64);
+
+		target->max_xmit = v4->max_xmit;
+		target->uid = v4->uid;
+		target->gid = v4->gid;
+		target->file_mode = v4->file_mode;
+		target->dir_mode = v4->dir_mode;
+
+		memset(target->domain, 0, 64);
+		strcpy(target->domain, "?");
+		return 0;
+	}
+	return 1;
+}
+
+struct super_block *
+smb_read_super(struct super_block *sb, void *raw_data, int silent)
+{
+	struct smb_mount_data data;
+	struct smb_server *server;
+	struct smb_sb_info *smb_sb;
+	unsigned int fd;
+	struct file *filp;
+	kdev_t dev = sb->s_dev;
+	int error;
+
+	if (smb_get_mount_data(&data, raw_data) != 0)
+	{
+		printk("smb_read_super: wrong data argument\n");
+		sb->s_dev = 0;
+		return NULL;
+	}
+	fd = data.fd;
+	if (fd >= NR_OPEN || !(filp = current->files->fd[fd]))
+	{
+		printk("smb_read_super: invalid file descriptor\n");
+		sb->s_dev = 0;
+		return NULL;
+	}
+	if (!S_ISSOCK(filp->f_inode->i_mode))
+	{
+		printk("smb_read_super: not a socket!\n");
+		sb->s_dev = 0;
+		return NULL;
+	}
+	/* We must malloc our own super-block info */
+	smb_sb = (struct smb_sb_info *) smb_kmalloc(sizeof(struct smb_sb_info),
+						    GFP_KERNEL);
+
+	if (smb_sb == NULL)
+	{
+		printk("smb_read_super: could not alloc smb_sb_info\n");
+		return NULL;
+	}
+	filp->f_count += 1;
+
+	lock_super(sb);
+
+	SMB_SBP(sb) = smb_sb;
+
+	sb->s_blocksize = 1024;	/* Eh...  Is this correct? */
+	sb->s_blocksize_bits = 10;
+	sb->s_magic = SMB_SUPER_MAGIC;
+	sb->s_dev = dev;
+	sb->s_op = &smb_sops;
+
+	server = &(SMB_SBP(sb)->s_server);
+	server->sock_file = filp;
+	server->lock = 0;
+	server->wait = NULL;
+	server->packet = NULL;
+	server->max_xmit = data.max_xmit;
+	if (server->max_xmit <= 0)
+	{
+		server->max_xmit = SMB_DEF_MAX_XMIT;
+	}
+	server->tid = 0;
+	server->pid = current->pid;
+	server->mid = current->pid + 20;
+
+	server->m = data;
+	server->m.file_mode = (server->m.file_mode &
+			       (S_IRWXU | S_IRWXG | S_IRWXO)) | S_IFREG;
+	server->m.dir_mode = (server->m.dir_mode &
+			      (S_IRWXU | S_IRWXG | S_IRWXO)) | S_IFDIR;
+
+	smb_init_root(server);
+
+	error = smb_proc_connect(server);
+
+	unlock_super(sb);
+
+	if (error < 0)
+	{
+		sb->s_dev = 0;
+		DPRINTK("smb_read_super: Failed connection, bailing out "
+			"(error = %d).\n", -error);
+		goto fail;
+	}
+	if (server->protocol >= PROTOCOL_LANMAN2)
+	{
+		server->case_handling = CASE_DEFAULT;
+	} else
+	{
+		server->case_handling = CASE_LOWER;
+	}
+
+	if ((error = smb_proc_dskattr(sb, &(SMB_SBP(sb)->s_attr))) < 0)
+	{
+		sb->s_dev = 0;
+		printk("smb_read_super: could not get super block "
+		       "attributes\n");
+		goto fail;
+	}
+	smb_init_root_dirent(server, &(server->root.finfo));
+
+	if (!(sb->s_mounted = iget(sb, smb_info_ino(&(server->root)))))
+	{
+		sb->s_dev = 0;
+		printk("smb_read_super: get root inode failed\n");
+		goto fail;
+	}
+	MOD_INC_USE_COUNT;
+	return sb;
+
+      fail:
+	if (server->packet != NULL)
+	{
+		smb_vfree(server->packet);
+		server->packet = NULL;
+	}
+	filp->f_count -= 1;
+	smb_dont_catch_keepalive(server);
+	smb_kfree_s(SMB_SBP(sb), sizeof(struct smb_sb_info));
+	return NULL;
+}
+
+static void
+smb_statfs(struct super_block *sb, struct statfs *buf, int bufsiz)
+{
+	int error;
+	struct smb_dskattr attr;
+	struct statfs tmp;
+
+	error = smb_proc_dskattr(sb, &attr);
+
+	if (error)
+	{
+		printk("smb_statfs: dskattr error = %d\n", -error);
+		attr.total = attr.allocblocks = attr.blocksize =
+		    attr.free = 0;
+	}
+	tmp.f_type = SMB_SUPER_MAGIC;
+	tmp.f_bsize = attr.blocksize * attr.allocblocks;
+	tmp.f_blocks = attr.total;
+	tmp.f_bfree = attr.free;
+	tmp.f_bavail = attr.free;
+	tmp.f_files = -1;
+	tmp.f_ffree = -1;
+	tmp.f_namelen = SMB_MAXPATHLEN;
+	copy_to_user(buf, &tmp, bufsiz);
+}
+
+int
+smb_notify_change(struct inode *inode, struct iattr *attr)
+{
+	int error = 0;
+
+	if ((error = inode_change_ok(inode, attr)) < 0)
+		return error;
+
+	if (((attr->ia_valid & ATTR_UID) &&
+	     (attr->ia_uid != SMB_SERVER(inode)->m.uid)))
+		return -EPERM;
+
+	if (((attr->ia_valid & ATTR_GID) &&
+	     (attr->ia_uid != SMB_SERVER(inode)->m.gid)))
+		return -EPERM;
+
+	if (((attr->ia_valid & ATTR_MODE) &&
+	(attr->ia_mode & ~(S_IFREG | S_IFDIR | S_IRWXU | S_IRWXG | S_IRWXO))))
+		return -EPERM;
+
+	if ((attr->ia_valid & ATTR_SIZE) != 0)
+	{
+
+		if ((error = smb_make_open(inode, O_WRONLY)) < 0)
+			goto fail;
+
+		if ((error = smb_proc_trunc(SMB_SERVER(inode),
+					    SMB_FINFO(inode)->fileid,
+					    attr->ia_size)) < 0)
+			goto fail;
+
+	}
+	if ((attr->ia_valid & (ATTR_CTIME | ATTR_MTIME | ATTR_ATIME)) != 0)
+	{
+
+		struct smb_dirent finfo;
+
+		finfo.attr = 0;
+		finfo.f_size = inode->i_size;
+		finfo.f_blksize = inode->i_blksize;
+
+		if ((attr->ia_valid & ATTR_CTIME) != 0)
+			finfo.f_ctime = attr->ia_ctime;
+		else
+			finfo.f_ctime = inode->i_ctime;
+
+		if ((attr->ia_valid & ATTR_MTIME) != 0)
+			finfo.f_mtime = attr->ia_mtime;
+		else
+			finfo.f_mtime = inode->i_mtime;
+
+		if ((attr->ia_valid & ATTR_ATIME) != 0)
+			finfo.f_atime = attr->ia_atime;
+		else
+			finfo.f_atime = inode->i_atime;
+
+		if ((error = smb_proc_setattr(SMB_SERVER(inode),
+					      inode, &finfo)) >= 0)
+		{
+			inode->i_ctime = finfo.f_ctime;
+			inode->i_mtime = finfo.f_mtime;
+			inode->i_atime = finfo.f_atime;
+		}
+	}
+      fail:
+	smb_invalid_dir_cache(smb_info_ino(SMB_INOP(inode)->dir));
+
+	return error;
+}
+
+
+#ifdef DEBUG_SMB_MALLOC
+int smb_malloced;
+int smb_current_kmalloced;
+int smb_current_vmalloced;
+#endif
+
+static struct file_system_type smb_fs_type =
+{
+	smb_read_super, "smbfs", 0, NULL
+};
+
+int
+init_smb_fs(void)
+{
+	return register_filesystem(&smb_fs_type);
+}
+
+#ifdef MODULE
+int
+init_module(void)
+{
+	int status;
+
+	DPRINTK("smbfs: init_module called\n");
+
+#ifdef DEBUG_SMB_MALLOC
+	smb_malloced = 0;
+	smb_current_kmalloced = 0;
+	smb_current_vmalloced = 0;
+#endif
+
+	smb_init_dir_cache();
+
+	if ((status = init_smb_fs()) == 0)
+		register_symtab(0);
+	return status;
+}
+
+void
+cleanup_module(void)
+{
+	DPRINTK("smbfs: cleanup_module called\n");
+	smb_free_dir_cache();
+	unregister_filesystem(&smb_fs_type);
+#ifdef DEBUG_SMB_MALLOC
+	printk("smb_malloced: %d\n", smb_malloced);
+	printk("smb_current_kmalloced: %d\n", smb_current_kmalloced);
+	printk("smb_current_vmalloced: %d\n", smb_current_vmalloced);
+#endif
+}
+
+#endif