1 files changed, 321 insertions, 0 deletions
diff --git a/fs/coda/inode.c b/fs/coda/inode.c
new file mode 100644
index 00000000000..04a73fb4848
--- /dev/null
+++ b/fs/coda/inode.c
@@ -0,0 +1,321 @@
+/*
+ * Super block/filesystem wide operations
+ *
+ * Copyright (C) 1996 Peter J. Braam <braam@maths.ox.ac.uk> and 
+ * Michael Callahan <callahan@maths.ox.ac.uk> 
+ * 
+ * Rewritten for Linux 2.1.  Peter Braam <braam@cs.cmu.edu>
+ * Copyright (C) Carnegie Mellon University
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/stat.h>
+#include <linux/errno.h>
+#include <linux/unistd.h>
+#include <linux/smp_lock.h>
+#include <linux/file.h>
+#include <linux/vfs.h>
+
+#include <asm/system.h>
+#include <asm/uaccess.h>
+
+#include <linux/fs.h>
+#include <linux/vmalloc.h>
+
+#include <linux/coda.h>
+#include <linux/coda_linux.h>
+#include <linux/coda_psdev.h>
+#include <linux/coda_fs_i.h>
+#include <linux/coda_cache.h>
+
+/* VFS super_block ops */
+static void coda_clear_inode(struct inode *);
+static void coda_put_super(struct super_block *);
+static int coda_statfs(struct super_block *sb, struct kstatfs *buf);
+
+static kmem_cache_t * coda_inode_cachep;
+
+static struct inode *coda_alloc_inode(struct super_block *sb)
+{
+	struct coda_inode_info *ei;
+	ei = (struct coda_inode_info *)kmem_cache_alloc(coda_inode_cachep, SLAB_KERNEL);
+	if (!ei)
+		return NULL;
+	memset(&ei->c_fid, 0, sizeof(struct CodaFid));
+	ei->c_flags = 0;
+	ei->c_uid = 0;
+	ei->c_cached_perm = 0;
+	return &ei->vfs_inode;
+}
+
+static void coda_destroy_inode(struct inode *inode)
+{
+	kmem_cache_free(coda_inode_cachep, ITOC(inode));
+}
+
+static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
+{
+	struct coda_inode_info *ei = (struct coda_inode_info *) foo;
+
+	if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
+	    SLAB_CTOR_CONSTRUCTOR)
+		inode_init_once(&ei->vfs_inode);
+}
+ 
+int coda_init_inodecache(void)
+{
+	coda_inode_cachep = kmem_cache_create("coda_inode_cache",
+				sizeof(struct coda_inode_info),
+				0, SLAB_RECLAIM_ACCOUNT,
+				init_once, NULL);
+	if (coda_inode_cachep == NULL)
+		return -ENOMEM;
+	return 0;
+}
+
+void coda_destroy_inodecache(void)
+{
+	if (kmem_cache_destroy(coda_inode_cachep))
+		printk(KERN_INFO "coda_inode_cache: not all structures were freed\n");
+}
+
+static int coda_remount(struct super_block *sb, int *flags, char *data)
+{
+	*flags |= MS_NODIRATIME;
+	return 0;
+}
+
+/* exported operations */
+static struct super_operations coda_super_operations =
+{
+	.alloc_inode	= coda_alloc_inode,
+	.destroy_inode	= coda_destroy_inode,
+	.clear_inode	= coda_clear_inode,
+	.put_super	= coda_put_super,
+	.statfs		= coda_statfs,
+	.remount_fs	= coda_remount,
+};
+
+static int get_device_index(struct coda_mount_data *data)
+{
+	struct file *file;
+	struct inode *inode;
+	int idx;
+
+	if(data == NULL) {
+		printk("coda_read_super: Bad mount data\n");
+		return -1;
+	}
+
+	if(data->version != CODA_MOUNT_VERSION) {
+		printk("coda_read_super: Bad mount version\n");
+		return -1;
+	}
+
+	file = fget(data->fd);
+	inode = NULL;
+	if(file)
+		inode = file->f_dentry->d_inode;
+	
+	if(!inode || !S_ISCHR(inode->i_mode) ||
+	   imajor(inode) != CODA_PSDEV_MAJOR) {
+		if(file)
+			fput(file);
+
+		printk("coda_read_super: Bad file\n");
+		return -1;
+	}
+
+	idx = iminor(inode);
+	fput(file);
+
+	if(idx < 0 || idx >= MAX_CODADEVS) {
+		printk("coda_read_super: Bad minor number\n");
+		return -1;
+	}
+
+	return idx;
+}
+
+static int coda_fill_super(struct super_block *sb, void *data, int silent)
+{
+        struct inode *root = NULL; 
+	struct coda_sb_info *sbi = NULL;
+	struct venus_comm *vc = NULL;
+	struct CodaFid fid;
+        int error;
+	int idx;
+
+	idx = get_device_index((struct coda_mount_data *) data);
+
+	/* Ignore errors in data, for backward compatibility */
+	if(idx == -1)
+		idx = 0;
+	
+	printk(KERN_INFO "coda_read_super: device index: %i\n", idx);
+
+	vc = &coda_comms[idx];
+	if (!vc->vc_inuse) {
+		printk("coda_read_super: No pseudo device\n");
+		return -EINVAL;
+	}
+
+        if ( vc->vc_sb ) {
+		printk("coda_read_super: Device already mounted\n");
+		return -EBUSY;
+	}
+
+	sbi = kmalloc(sizeof(struct coda_sb_info), GFP_KERNEL);
+	if(!sbi) {
+		return -ENOMEM;
+	}
+
+	vc->vc_sb = sb;
+
+	sbi->sbi_vcomm = vc;
+
+        sb->s_fs_info = sbi;
+	sb->s_flags |= MS_NODIRATIME; /* probably even noatime */
+        sb->s_blocksize = 1024;	/* XXXXX  what do we put here?? */
+        sb->s_blocksize_bits = 10;
+        sb->s_magic = CODA_SUPER_MAGIC;
+        sb->s_op = &coda_super_operations;
+
+	/* get root fid from Venus: this needs the root inode */
+	error = venus_rootfid(sb, &fid);
+	if ( error ) {
+	        printk("coda_read_super: coda_get_rootfid failed with %d\n",
+		       error);
+		goto error;
+	}
+	printk("coda_read_super: rootfid is %s\n", coda_f2s(&fid));
+	
+	/* make root inode */
+        error = coda_cnode_make(&root, &fid, sb);
+        if ( error || !root ) {
+	    printk("Failure of coda_cnode_make for root: error %d\n", error);
+	    goto error;
+	} 
+
+	printk("coda_read_super: rootinode is %ld dev %s\n", 
+	       root->i_ino, root->i_sb->s_id);
+	sb->s_root = d_alloc_root(root);
+	if (!sb->s_root)
+		goto error;
+        return 0;
+
+ error:
+	if (sbi) {
+		kfree(sbi);
+		if(vc)
+			vc->vc_sb = NULL;		
+	}
+	if (root)
+                iput(root);
+
+        return -EINVAL;
+}
+
+static void coda_put_super(struct super_block *sb)
+{
+        struct coda_sb_info *sbi;
+
+	sbi = coda_sbp(sb);
+	sbi->sbi_vcomm->vc_sb = NULL;
+
+	printk("Coda: Bye bye.\n");
+	kfree(sbi);
+}
+
+static void coda_clear_inode(struct inode *inode)
+{
+	coda_cache_clear_inode(inode);
+}
+
+int coda_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
+{
+	int err = coda_revalidate_inode(dentry);
+	if (!err)
+		generic_fillattr(dentry->d_inode, stat);
+	return err;
+}
+
+int coda_setattr(struct dentry *de, struct iattr *iattr)
+{
+	struct inode *inode = de->d_inode;
+	struct coda_vattr vattr;
+	int error;
+
+	lock_kernel();
+	
+	memset(&vattr, 0, sizeof(vattr)); 
+
+	inode->i_ctime = CURRENT_TIME_SEC;
+	coda_iattr_to_vattr(iattr, &vattr);
+	vattr.va_type = C_VNON; /* cannot set type */
+
+	/* Venus is responsible for truncating the container-file!!! */
+	error = venus_setattr(inode->i_sb, coda_i2f(inode), &vattr);
+
+	if ( !error ) {
+	        coda_vattr_to_iattr(inode, &vattr); 
+		coda_cache_clear_inode(inode);
+	}
+
+	unlock_kernel();
+
+	return error;
+}
+
+struct inode_operations coda_file_inode_operations = {
+	.permission	= coda_permission,
+	.getattr	= coda_getattr,
+	.setattr	= coda_setattr,
+};
+
+static int coda_statfs(struct super_block *sb, struct kstatfs *buf)
+{
+	int error;
+	
+	lock_kernel();
+
+	error = venus_statfs(sb, buf);
+
+	unlock_kernel();
+
+	if (error) {
+		/* fake something like AFS does */
+		buf->f_blocks = 9000000;
+		buf->f_bfree  = 9000000;
+		buf->f_bavail = 9000000;
+		buf->f_files  = 9000000;
+		buf->f_ffree  = 9000000;
+	}
+
+	/* and fill in the rest */
+	buf->f_type = CODA_SUPER_MAGIC;
+	buf->f_bsize = 1024;
+	buf->f_namelen = CODA_MAXNAMLEN;
+
+	return 0; 
+}
+
+/* init_coda: used by filesystems.c to register coda */
+
+static struct super_block *coda_get_sb(struct file_system_type *fs_type,
+	int flags, const char *dev_name, void *data)
+{
+	return get_sb_nodev(fs_type, flags, data, coda_fill_super);
+}
+
+struct file_system_type coda_fs_type = {
+	.owner		= THIS_MODULE,
+	.name		= "coda",
+	.get_sb		= coda_get_sb,
+	.kill_sb	= kill_anon_super,
+	.fs_flags	= FS_BINARY_MOUNTDATA,
+};
+