Linux-2.6.12-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!
diff --git a/fs/efs/namei.c b/fs/efs/namei.c
new file mode 100644
index 0000000..ed4a207
--- /dev/null
+++ b/fs/efs/namei.c
@@ -0,0 +1,110 @@
+/*
+ * namei.c
+ *
+ * Copyright (c) 1999 Al Smith
+ *
+ * Portions derived from work (c) 1995,1996 Christian Vogelgsang.
+ */
+
+#include <linux/buffer_head.h>
+#include <linux/string.h>
+#include <linux/efs_fs.h>
+#include <linux/smp_lock.h>
+
+static efs_ino_t efs_find_entry(struct inode *inode, const char *name, int len) {
+ struct buffer_head *bh;
+
+ int slot, namelen;
+ char *nameptr;
+ struct efs_dir *dirblock;
+ struct efs_dentry *dirslot;
+ efs_ino_t inodenum;
+ efs_block_t block;
+
+ if (inode->i_size & (EFS_DIRBSIZE-1))
+ printk(KERN_WARNING "EFS: WARNING: find_entry(): directory size not a multiple of EFS_DIRBSIZE\n");
+
+ for(block = 0; block < inode->i_blocks; block++) {
+
+ bh = sb_bread(inode->i_sb, efs_bmap(inode, block));
+ if (!bh) {
+ printk(KERN_ERR "EFS: find_entry(): failed to read dir block %d\n", block);
+ return 0;
+ }
+
+ dirblock = (struct efs_dir *) bh->b_data;
+
+ if (be16_to_cpu(dirblock->magic) != EFS_DIRBLK_MAGIC) {
+ printk(KERN_ERR "EFS: find_entry(): invalid directory block\n");
+ brelse(bh);
+ return(0);
+ }
+
+ for(slot = 0; slot < dirblock->slots; slot++) {
+ dirslot = (struct efs_dentry *) (((char *) bh->b_data) + EFS_SLOTAT(dirblock, slot));
+
+ namelen = dirslot->namelen;
+ nameptr = dirslot->name;
+
+ if ((namelen == len) && (!memcmp(name, nameptr, len))) {
+ inodenum = be32_to_cpu(dirslot->inode);
+ brelse(bh);
+ return(inodenum);
+ }
+ }
+ brelse(bh);
+ }
+ return(0);
+}
+
+struct dentry *efs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd) {
+ efs_ino_t inodenum;
+ struct inode * inode = NULL;
+
+ lock_kernel();
+ inodenum = efs_find_entry(dir, dentry->d_name.name, dentry->d_name.len);
+ if (inodenum) {
+ if (!(inode = iget(dir->i_sb, inodenum))) {
+ unlock_kernel();
+ return ERR_PTR(-EACCES);
+ }
+ }
+ unlock_kernel();
+
+ d_add(dentry, inode);
+ return NULL;
+}
+
+struct dentry *efs_get_parent(struct dentry *child)
+{
+ struct dentry *parent;
+ struct inode *inode;
+ efs_ino_t ino;
+ int error;
+
+ lock_kernel();
+
+ error = -ENOENT;
+ ino = efs_find_entry(child->d_inode, "..", 2);
+ if (!ino)
+ goto fail;
+
+ error = -EACCES;
+ inode = iget(child->d_inode->i_sb, ino);
+ if (!inode)
+ goto fail;
+
+ error = -ENOMEM;
+ parent = d_alloc_anon(inode);
+ if (!parent)
+ goto fail_iput;
+
+ unlock_kernel();
+ return parent;
+
+ fail_iput:
+ iput(inode);
+ fail:
+ unlock_kernel();
+ return ERR_PTR(error);
+}