Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 321 insertions, 0 deletions

diff --git a/fs/coda/inode.c b/fs/coda/inode.c
new file mode 100644
index 000000000000..04a73fb4848f
--- /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,
+};
+