patch-1.3.53 linux/fs/ncpfs/inode.c

• Lines: 520
• Date: Tue Jan 2 14:18:43 1996
• Orig file: v1.3.52/linux/fs/ncpfs/inode.c
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v1.3.52/linux/fs/ncpfs/inode.c linux/fs/ncpfs/inode.c
@@ -0,0 +1,519 @@
+/*
+ *  inode.c
+ *
+ *  Copyright (C) 1995 by Volker Lendecke
+ *
+ */
+
+#include <linux/module.h>
+
+#include <asm/system.h>
+#include <asm/segment.h>
+
+#include <linux/sched.h>
+#include <linux/ncp_fs.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 "ncplib_kernel.h"
+
+extern int close_fp(struct file *filp);
+
+static void ncp_put_inode(struct inode *);
+static void ncp_read_inode(struct inode *);
+static void ncp_put_super(struct super_block *);
+static void ncp_statfs(struct super_block *sb, struct statfs *buf, int bufsiz);
+static int ncp_notify_change(struct inode *inode, struct iattr *attr);
+
+static struct super_operations ncp_sops = {
+	ncp_read_inode,         /* read inode */
+	ncp_notify_change,	/* notify change */
+	NULL,			/* write inode */
+	ncp_put_inode,		/* put inode */
+	ncp_put_super,		/* put superblock */
+	NULL,			/* write superblock */
+	ncp_statfs,		/* stat filesystem */
+	NULL
+};
+
+/* ncp_read_inode: Called from iget, it only traverses the allocated
+   ncp_inode_info's and initializes the inode from the data found
+   there.  It does not allocate or deallocate anything. */
+
+static void
+ncp_read_inode(struct inode *inode)
+{
+        /* Our task should be extremely simple here. We only have to
+           look up the infomation somebody else (ncp_iget) put into
+           the inode tree. The address of this information is the
+           inode->i_ino. Just to make sure everything went well, we
+           check it's there. */
+
+        struct ncp_inode_info *inode_info
+                = (struct ncp_inode_info *)(inode->i_ino);
+
+#if 1
+        struct ncp_inode_info *root = &(NCP_SERVER(inode)->root);
+        struct ncp_inode_info *check_info = root;
+
+        do
+	{
+                if (inode_info == check_info)
+		{
+                        if (check_info->state == NCP_INODE_LOOKED_UP)
+			{
+                                DDPRINTK("ncp_read_inode: found it!\n");
+                                goto good;
+                        }
+                        else
+			{
+                                printk("ncp_read_inode: "
+                                       "state != NCP_INODE_LOOKED_UP\n");
+				goto good;
+                        }
+                }
+                check_info = check_info->next;
+        }
+	while (check_info != root);
+
+        /* Ok, now we're in trouble. The inode info is not there. What
+           should we do now??? */
+        printk("ncp_read_inode: inode info not found\n");
+        return;
+
+ good:
+	DDPRINTK("ncp_read_inode: read entry %s\n",
+		 inode_info->finfo.i.entryName);
+#endif
+        inode_info->state = NCP_INODE_VALID;
+
+        NCP_INOP(inode) = inode_info;
+
+        if (NCP_ISTRUCT(inode)->attributes & aDIR)
+	{
+                inode->i_mode = NCP_SERVER(inode)->m.dir_mode;
+		/* for directories in dataStreamSize seems to be some
+		   Object ID ??? */
+		inode->i_size = 512;
+	}
+	else
+	{
+                inode->i_mode = NCP_SERVER(inode)->m.file_mode;
+		inode->i_size = NCP_ISTRUCT(inode)->dataStreamSize;
+	}
+
+        DDPRINTK("ncp_read_inode: inode->i_mode = %u\n", inode->i_mode);
+
+        inode->i_nlink   = 1;
+        inode->i_uid     = NCP_SERVER(inode)->m.uid;
+        inode->i_gid     = NCP_SERVER(inode)->m.gid;
+        inode->i_blksize = 1024;
+        inode->i_rdev    = 0;
+
+        if ((inode->i_blksize != 0) && (inode->i_size != 0))
+	{
+                inode->i_blocks =
+                        (inode->i_size - 1) / inode->i_blksize + 1;
+	}
+        else
+	{
+                inode->i_blocks = 0;
+	}
+
+	inode->i_mtime = ncp_date_dos2unix(NCP_ISTRUCT(inode)->modifyTime,
+					   NCP_ISTRUCT(inode)->modifyDate);
+	inode->i_ctime = ncp_date_dos2unix(NCP_ISTRUCT(inode)->creationTime,
+					   NCP_ISTRUCT(inode)->creationDate);
+	inode->i_atime = ncp_date_dos2unix(0,
+					   NCP_ISTRUCT(inode)->lastAccessDate);
+
+        if (S_ISREG(inode->i_mode))
+	{
+                inode->i_op = &ncp_file_inode_operations;
+	}
+        else if (S_ISDIR(inode->i_mode))
+	{
+                inode->i_op = &ncp_dir_inode_operations;
+	}
+        else
+	{
+                inode->i_op = NULL;
+	}
+}
+
+static void
+ncp_put_inode(struct inode *inode)
+{
+        struct nw_file_info *finfo = NCP_FINFO(inode);
+
+        if (finfo->opened != 0)
+	{
+                if (ncp_close_file(NCP_SERVER(inode), finfo->file_handle)!=0)
+		{
+                        /* We can't do anything but complain. */
+                        printk("ncp_put_inode: could not close\n");
+                }
+        }
+
+	DDPRINTK("ncp_put_inode: put %s\n",
+		finfo->i.entryName);
+
+        ncp_free_inode_info(NCP_INOP(inode));
+
+        if (S_ISDIR(inode->i_mode))
+	{
+                DDPRINTK("ncp_put_inode: put directory %ld\n",
+			 inode->i_ino);
+                ncp_invalid_dir_cache(inode->i_ino);
+        }                
+
+	clear_inode(inode);
+}
+
+struct super_block *
+ncp_read_super(struct super_block *sb, void *raw_data, int silent)
+{
+	struct ncp_mount_data *data = (struct ncp_mount_data *) raw_data;
+        struct ncp_server *server;
+	struct file *ncp_filp;
+	struct file *wdog_filp;
+	kdev_t dev = sb->s_dev;
+	int error;
+
+	if (data == NULL)
+	{
+		printk("ncp_read_super: missing data argument\n");
+		sb->s_dev = 0;
+		return NULL;
+	}
+
+	if (data->version != NCP_MOUNT_VERSION)
+	{
+		printk("ncp warning: mount version %s than kernel\n",
+		       (data->version < NCP_MOUNT_VERSION) ?
+                       "older" : "newer");
+	}
+
+	if (   (data->ncp_fd >= NR_OPEN)
+	    || ((ncp_filp = current->files->fd[data->ncp_fd]) == NULL)
+	    || (!S_ISSOCK(ncp_filp->f_inode->i_mode)))
+	{
+		printk("ncp_read_super: invalid ncp socket\n");
+		sb->s_dev = 0;
+		return NULL;
+	}
+
+	if (   (data->wdog_fd >= NR_OPEN)
+	    || ((wdog_filp = current->files->fd[data->wdog_fd]) == NULL)
+	    || (!S_ISSOCK(wdog_filp->f_inode->i_mode)))
+	{
+		printk("ncp_read_super: invalid wdog socket\n");
+		sb->s_dev = 0;
+		return NULL;
+	}
+
+        /* We must malloc our own super-block info */
+        server = (struct ncp_server *)ncp_kmalloc(sizeof(struct ncp_server),
+                                                   GFP_KERNEL);
+
+        if (server == NULL)
+	{
+                printk("ncp_read_super: could not alloc ncp_server\n");
+                return NULL;
+        }
+
+	ncp_filp->f_count += 1;
+	wdog_filp->f_count += 1;
+
+	lock_super(sb);
+
+        NCP_SBP(sb) = server;
+        
+	sb->s_blocksize = 1024; /* Eh...  Is this correct? */
+	sb->s_blocksize_bits = 10;
+	sb->s_magic = NCP_SUPER_MAGIC;
+	sb->s_dev = dev;
+	sb->s_op = &ncp_sops;
+
+	server->ncp_filp    = ncp_filp;
+	server->wdog_filp   = wdog_filp;
+	server->lock        = 0;
+	server->wait        = NULL;
+        server->packet      = NULL;
+	server->buffer_size = 0;
+
+        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;
+
+	server->packet_size = NCP_PACKET_SIZE;
+	server->packet      = ncp_kmalloc(NCP_PACKET_SIZE, GFP_KERNEL);
+
+	if (server->packet == NULL)
+	{
+		printk("ncpfs: could not alloc packet\n");
+		error = -ENOMEM;
+		unlock_super(sb);
+		goto fail;
+	}
+   
+        ncp_init_root(server);
+
+        /*
+         * Make the connection to the server
+         */
+
+	if (ncp_catch_watchdog(server) != 0)
+	{
+		printk("ncp_read_super: Could not catch watchdog\n");
+		error = -EINVAL;
+		unlock_super(sb);
+		goto fail;
+	}
+
+	ncp_lock_server(server);
+	error = ncp_connect(server);
+	ncp_unlock_server(server);
+	unlock_super(sb);
+
+	if (error < 0)
+	{
+		sb->s_dev = 0;
+		printk("ncp_read_super: Failed connection, bailing out "
+                       "(error = %d).\n", -error);
+                ncp_kfree_s(server->packet, server->packet_size);
+		ncp_dont_catch_watchdog(server);
+                goto fail;
+	}
+
+        DPRINTK("ncp_read_super: NCP_SBP(sb) = %x\n", (int)NCP_SBP(sb));
+
+	if (!(sb->s_mounted = iget(sb, (int)&(server->root))))
+	{
+		sb->s_dev = 0;
+		printk("ncp_read_super: get root inode failed\n");
+                goto disconnect;
+	}
+
+	if (ncp_negotiate_buffersize(server, NCP_DEFAULT_BUFSIZE,
+				     &(server->buffer_size)) != 0)
+	{
+		sb->s_dev = 0;
+		printk("ncp_read_super: could not get bufsize\n");
+		goto disconnect;
+	}
+
+	DPRINTK("ncpfs: bufsize = %d\n", server->buffer_size);
+
+        MOD_INC_USE_COUNT;
+	return sb;
+
+ disconnect:
+	ncp_lock_server(server);
+	ncp_disconnect(server);
+	ncp_unlock_server(server);
+	ncp_kfree_s(server->packet, server->packet_size);
+	ncp_dont_catch_watchdog(server);
+ fail:
+	ncp_filp->f_count -= 1;
+	wdog_filp->f_count -= 1;
+        ncp_kfree_s(NCP_SBP(sb), sizeof(struct ncp_server));
+        return NULL;
+}
+
+static void
+ncp_put_super(struct super_block *sb)
+{
+        struct ncp_server *server = NCP_SBP(sb);
+
+	lock_super(sb);
+
+	ncp_lock_server(server);
+        ncp_disconnect(server);
+	ncp_unlock_server(server);
+
+	close_fp(server->ncp_filp);
+
+	ncp_dont_catch_watchdog(server);
+	close_fp(server->wdog_filp);
+
+        ncp_free_all_inodes(server);
+
+        ncp_kfree_s(server->packet, server->packet_size);
+
+	sb->s_dev = 0;
+        ncp_kfree_s(NCP_SBP(sb), sizeof(struct ncp_server));
+	NCP_SBP(sb) = NULL;
+
+	unlock_super(sb);
+
+        MOD_DEC_USE_COUNT;
+}
+
+static void 
+ncp_statfs(struct super_block *sb, struct statfs *buf, int bufsiz)
+{
+	struct statfs tmp;
+	
+	/* We cannot say how much disk space is left on a mounted
+           NetWare Server, because free space is distributed over
+           volumes, and the current user might have disk quotas. So
+           free space is not that simple to determine. Our decision
+           here is to err conservatively. */
+
+	tmp.f_type = NCP_SUPER_MAGIC;
+	tmp.f_bsize = 512;
+	tmp.f_blocks = 0;
+	tmp.f_bfree = 0;
+	tmp.f_bavail = 0;
+	tmp.f_files = -1;
+	tmp.f_ffree = -1;
+	tmp.f_namelen = 12;
+	memcpy_tofs(buf, &tmp, bufsiz);
+}
+
+static int
+ncp_notify_change(struct inode *inode, struct iattr *attr)
+{
+	int result = 0;
+	int info_mask;
+	struct nw_modify_dos_info info;
+
+	if ((result = inode_change_ok(inode, attr)) < 0)
+		return result;
+
+	if (((attr->ia_valid & ATTR_UID) && 
+	     (attr->ia_uid != NCP_SERVER(inode)->m.uid)))
+		return -EPERM;
+
+	if (((attr->ia_valid & ATTR_GID) && 
+	     (attr->ia_uid != NCP_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;
+
+	info_mask = 0;
+	memset(&info, 0, sizeof(info));
+
+	if ((attr->ia_valid & ATTR_CTIME) != 0)
+	{
+		info_mask |= (DM_CREATE_TIME|DM_CREATE_DATE);
+		ncp_date_unix2dos(attr->ia_ctime,
+				  &(info.creationTime), &(info.creationDate));
+	}
+	
+	if ((attr->ia_valid & ATTR_MTIME) != 0)
+	{
+		info_mask |= (DM_MODIFY_TIME|DM_MODIFY_DATE);
+		ncp_date_unix2dos(attr->ia_mtime,
+				  &(info.modifyTime), &(info.modifyDate));
+	}
+	
+	if ((attr->ia_valid & ATTR_ATIME) != 0)
+	{
+		__u16 dummy;
+		info_mask |= (DM_LAST_ACCESS_DATE);
+		ncp_date_unix2dos(attr->ia_ctime,
+				  &(dummy), &(info.lastAccessDate));
+	}
+
+	if (info_mask != 0)
+	{
+		if ((result =
+		     ncp_modify_file_or_subdir_dos_info(NCP_SERVER(inode),
+							NCP_ISTRUCT(inode),
+							info_mask,
+							&info)) != 0)
+		{
+			result = -EACCES;
+
+			if (info_mask == (DM_CREATE_TIME|DM_CREATE_DATE))
+			{
+				/* NetWare seems not to allow this. I
+                                   do not know why. So, just tell the
+                                   user everything went fine. This is
+                                   a terrible hack, but I do not know
+                                   how to do this correctly. */
+				result = 0;
+			}
+		}
+	}
+
+        if ((attr->ia_valid & ATTR_SIZE) != 0)
+	{
+		int written;
+
+		DPRINTK("ncpfs: trying to change size of %s to %ld\n",
+			NCP_ISTRUCT(inode)->entryName, attr->ia_size);
+
+		if ((result = ncp_make_open(inode, O_RDWR)) < 0)
+		{
+			return -EACCES;
+		}
+
+		ncp_write(NCP_SERVER(inode), NCP_FINFO(inode)->file_handle,
+			  attr->ia_size, 0, "", &written);
+
+		/* According to ndir, the changes only take effect after
+		   closing the file */
+		ncp_close_file(NCP_SERVER(inode),
+			       NCP_FINFO(inode)->file_handle);
+		NCP_FINFO(inode)->opened = 0;
+
+		result = 0;
+	}
+
+        ncp_invalid_dir_cache((unsigned long)(NCP_INOP(inode)->dir));
+
+	return result;
+}
+		
+#ifdef DEBUG_NCP_MALLOC
+int ncp_malloced;
+int ncp_current_malloced;
+#endif
+
+#ifdef MODULE
+
+static struct file_system_type ncp_fs_type = {
+        ncp_read_super, "ncpfs", 0, NULL
+        };
+
+int
+init_module( void)
+{
+        DPRINTK("ncpfs: init_module called\n");
+
+#ifdef DEBUG_NCP_MALLOC
+        ncp_malloced = 0;
+        ncp_current_malloced = 0;
+#endif
+
+        ncp_init_dir_cache();
+        register_filesystem(&ncp_fs_type);
+        return 0;
+}
+
+void
+cleanup_module(void)
+{
+        DPRINTK("ncpfs: cleanup_module called\n");
+        ncp_free_dir_cache();
+        unregister_filesystem(&ncp_fs_type);
+#ifdef DEBUG_NCP_MALLOC
+        printk("ncp_malloced: %d\n", ncp_malloced);
+        printk("ncp_current_malloced: %d\n", ncp_current_malloced);
+#endif
+}
+
+#endif