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, 302 insertions, 0 deletions

diff --git a/fs/adfs/dir.c b/fs/adfs/dir.c
new file mode 100644
index 000000000000..0b4c3a028076
--- /dev/null
+++ b/fs/adfs/dir.c
@@ -0,0 +1,302 @@
+/*
+ *  linux/fs/adfs/dir.c
+ *
+ *  Copyright (C) 1999-2000 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ *  Common directory handling for ADFS
+ */
+#include <linux/config.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/adfs_fs.h>
+#include <linux/time.h>
+#include <linux/stat.h>
+#include <linux/spinlock.h>
+#include <linux/smp_lock.h>
+#include <linux/buffer_head.h>          /* for file_fsync() */
+
+#include "adfs.h"
+
+/*
+ * For future.  This should probably be per-directory.
+ */
+static DEFINE_RWLOCK(adfs_dir_lock);
+
+static int
+adfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
+{
+        struct inode *inode = filp->f_dentry->d_inode;
+        struct super_block *sb = inode->i_sb;
+        struct adfs_dir_ops *ops = ADFS_SB(sb)->s_dir;
+        struct object_info obj;
+        struct adfs_dir dir;
+        int ret = 0;
+
+        lock_kernel();  
+
+        if (filp->f_pos >> 32)
+                goto out;
+
+        ret = ops->read(sb, inode->i_ino, inode->i_size, &dir);
+        if (ret)
+                goto out;
+
+        switch ((unsigned long)filp->f_pos) {
+        case 0:
+                if (filldir(dirent, ".", 1, 0, inode->i_ino, DT_DIR) < 0)
+                        goto free_out;
+                filp->f_pos += 1;
+
+        case 1:
+                if (filldir(dirent, "..", 2, 1, dir.parent_id, DT_DIR) < 0)
+                        goto free_out;
+                filp->f_pos += 1;
+
+        default:
+                break;
+        }
+
+        read_lock(&adfs_dir_lock);
+
+        ret = ops->setpos(&dir, filp->f_pos - 2);
+        if (ret)
+                goto unlock_out;
+        while (ops->getnext(&dir, &obj) == 0) {
+                if (filldir(dirent, obj.name, obj.name_len,
+                            filp->f_pos, obj.file_id, DT_UNKNOWN) < 0)
+                        goto unlock_out;
+                filp->f_pos += 1;
+        }
+
+unlock_out:
+        read_unlock(&adfs_dir_lock);
+
+free_out:
+        ops->free(&dir);
+
+out:
+        unlock_kernel();
+        return ret;
+}
+
+int
+adfs_dir_update(struct super_block *sb, struct object_info *obj)
+{
+        int ret = -EINVAL;
+#ifdef CONFIG_ADFS_FS_RW
+        struct adfs_dir_ops *ops = ADFS_SB(sb)->s_dir;
+        struct adfs_dir dir;
+
+        printk(KERN_INFO "adfs_dir_update: object %06X in dir %06X\n",
+                 obj->file_id, obj->parent_id);
+
+        if (!ops->update) {
+                ret = -EINVAL;
+                goto out;
+        }
+
+        ret = ops->read(sb, obj->parent_id, 0, &dir);
+        if (ret)
+                goto out;
+
+        write_lock(&adfs_dir_lock);
+        ret = ops->update(&dir, obj);
+        write_unlock(&adfs_dir_lock);
+
+        ops->free(&dir);
+out:
+#endif
+        return ret;
+}
+
+static int
+adfs_match(struct qstr *name, struct object_info *obj)
+{
+        int i;
+
+        if (name->len != obj->name_len)
+                return 0;
+
+        for (i = 0; i < name->len; i++) {
+                char c1, c2;
+
+                c1 = name->name[i];
+                c2 = obj->name[i];
+
+                if (c1 >= 'A' && c1 <= 'Z')
+                        c1 += 'a' - 'A';
+                if (c2 >= 'A' && c2 <= 'Z')
+                        c2 += 'a' - 'A';
+
+                if (c1 != c2)
+                        return 0;
+        }
+        return 1;
+}
+
+static int
+adfs_dir_lookup_byname(struct inode *inode, struct qstr *name, struct object_info *obj)
+{
+        struct super_block *sb = inode->i_sb;
+        struct adfs_dir_ops *ops = ADFS_SB(sb)->s_dir;
+        struct adfs_dir dir;
+        int ret;
+
+        ret = ops->read(sb, inode->i_ino, inode->i_size, &dir);
+        if (ret)
+                goto out;
+
+        if (ADFS_I(inode)->parent_id != dir.parent_id) {
+                adfs_error(sb, "parent directory changed under me! (%lx but got %lx)\n",
+                           ADFS_I(inode)->parent_id, dir.parent_id);
+                ret = -EIO;
+                goto free_out;
+        }
+
+        obj->parent_id = inode->i_ino;
+
+        /*
+         * '.' is handled by reserved_lookup() in fs/namei.c
+         */
+        if (name->len == 2 && name->name[0] == '.' && name->name[1] == '.') {
+                /*
+                 * Currently unable to fill in the rest of 'obj',
+                 * but this is better than nothing.  We need to
+                 * ascend one level to find it's parent.
+                 */
+                obj->name_len = 0;
+                obj->file_id  = obj->parent_id;
+                goto free_out;
+        }
+
+        read_lock(&adfs_dir_lock);
+
+        ret = ops->setpos(&dir, 0);
+        if (ret)
+                goto unlock_out;
+
+        ret = -ENOENT;
+        while (ops->getnext(&dir, obj) == 0) {
+                if (adfs_match(name, obj)) {
+                        ret = 0;
+                        break;
+                }
+        }
+
+unlock_out:
+        read_unlock(&adfs_dir_lock);
+
+free_out:
+        ops->free(&dir);
+out:
+        return ret;
+}
+
+struct file_operations adfs_dir_operations = {
+        .read           = generic_read_dir,
+        .readdir        = adfs_readdir,
+        .fsync          = file_fsync,
+};
+
+static int
+adfs_hash(struct dentry *parent, struct qstr *qstr)
+{
+        const unsigned int name_len = ADFS_SB(parent->d_sb)->s_namelen;
+        const unsigned char *name;
+        unsigned long hash;
+        int i;
+
+        if (qstr->len < name_len)
+                return 0;
+
+        /*
+         * Truncate the name in place, avoids
+         * having to define a compare function.
+         */
+        qstr->len = i = name_len;
+        name = qstr->name;
+        hash = init_name_hash();
+        while (i--) {
+                char c;
+
+                c = *name++;
+                if (c >= 'A' && c <= 'Z')
+                        c += 'a' - 'A';
+
+                hash = partial_name_hash(c, hash);
+        }
+        qstr->hash = end_name_hash(hash);
+
+        return 0;
+}
+
+/*
+ * Compare two names, taking note of the name length
+ * requirements of the underlying filesystem.
+ */
+static int
+adfs_compare(struct dentry *parent, struct qstr *entry, struct qstr *name)
+{
+        int i;
+
+        if (entry->len != name->len)
+                return 1;
+
+        for (i = 0; i < name->len; i++) {
+                char a, b;
+
+                a = entry->name[i];
+                b = name->name[i];
+
+                if (a >= 'A' && a <= 'Z')
+                        a += 'a' - 'A';
+                if (b >= 'A' && b <= 'Z')
+                        b += 'a' - 'A';
+
+                if (a != b)
+                        return 1;
+        }
+        return 0;
+}
+
+struct dentry_operations adfs_dentry_operations = {
+        .d_hash         = adfs_hash,
+        .d_compare      = adfs_compare,
+};
+
+static struct dentry *
+adfs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+{
+        struct inode *inode = NULL;
+        struct object_info obj;
+        int error;
+
+        dentry->d_op = &adfs_dentry_operations; 
+        lock_kernel();
+        error = adfs_dir_lookup_byname(dir, &dentry->d_name, &obj);
+        if (error == 0) {
+                error = -EACCES;
+                /*
+                 * This only returns NULL if get_empty_inode
+                 * fails.
+                 */
+                inode = adfs_iget(dir->i_sb, &obj);
+                if (inode)
+                        error = 0;
+        }
+        unlock_kernel();
+        d_add(dentry, inode);
+        return ERR_PTR(error);
+}
+
+/*
+ * directories can handle most operations...
+ */
+struct inode_operations adfs_dir_inode_operations = {
+        .lookup         = adfs_lookup,
+        .setattr        = adfs_notify_change,
+};