1 files changed, 96 insertions, 125 deletions

diff --git a/fs/ufs/namei.c b/fs/ufs/namei.c
index 2958cde7d3d..90d74b8f8eb 100644
--- a/fs/ufs/namei.c
+++ b/fs/ufs/namei.c
@@ -1,6 +1,9 @@
 /*
  * linux/fs/ufs/namei.c
  *
+ * Migration to usage of "page cache" on May 2006 by
+ * Evgeniy Dushistov <dushistov@mail.ru> based on ext2 code base.
+ *
  * Copyright (C) 1998
  * Daniel Pirkl <daniel.pirkl@email.cz>
  * Charles University, Faculty of Mathematics and Physics
@@ -26,34 +29,10 @@
 
 #include <linux/time.h>
 #include <linux/fs.h>
-#include <linux/ufs_fs.h>
-#include <linux/smp_lock.h>
-#include <linux/buffer_head.h>
-#include "swab.h"	/* will go away - see comment in mknod() */
-#include "util.h"
-
-/*
-#undef UFS_NAMEI_DEBUG
-*/
-#define UFS_NAMEI_DEBUG
-
-#ifdef UFS_NAMEI_DEBUG
-#define UFSD(x) printk("(%s, %d), %s: ", __FILE__, __LINE__, __FUNCTION__); printk x;
-#else
-#define UFSD(x)
-#endif
-
-static inline void ufs_inc_count(struct inode *inode)
-{
-	inode->i_nlink++;
-	mark_inode_dirty(inode);
-}
 
-static inline void ufs_dec_count(struct inode *inode)
-{
-	inode->i_nlink--;
-	mark_inode_dirty(inode);
-}
+#include "ufs_fs.h"
+#include "ufs.h"
+#include "util.h"
 
 static inline int ufs_add_nondir(struct dentry *dentry, struct inode *inode)
 {
@@ -62,12 +41,12 @@ static inline int ufs_add_nondir(struct dentry *dentry, struct inode *inode)
 		d_instantiate(dentry, inode);
 		return 0;
 	}
-	ufs_dec_count(inode);
+	inode_dec_link_count(inode);
 	iput(inode);
 	return err;
 }
 
-static struct dentry *ufs_lookup(struct inode * dir, struct dentry *dentry, struct nameidata *nd)
+static struct dentry *ufs_lookup(struct inode * dir, struct dentry *dentry, unsigned int flags)
 {
 	struct inode * inode = NULL;
 	ino_t ino;
@@ -75,18 +54,12 @@ static struct dentry *ufs_lookup(struct inode * dir, struct dentry *dentry, stru
 	if (dentry->d_name.len > UFS_MAXNAMLEN)
 		return ERR_PTR(-ENAMETOOLONG);
 
-	lock_kernel();
-	ino = ufs_inode_by_name(dir, dentry);
-	if (ino) {
-		inode = iget(dir->i_sb, ino);
-		if (!inode) {
-			unlock_kernel();
-			return ERR_PTR(-EACCES);
-		}
-	}
-	unlock_kernel();
-	d_add(dentry, inode);
-	return NULL;
+	lock_ufs(dir->i_sb);
+	ino = ufs_inode_by_name(dir, &dentry->d_name);
+	if (ino)
+		inode = ufs_iget(dir->i_sb, ino);
+	unlock_ufs(dir->i_sb);
+	return d_splice_alias(inode, dentry);
 }
 
 /*
@@ -97,40 +70,47 @@ static struct dentry *ufs_lookup(struct inode * dir, struct dentry *dentry, stru
  * If the create succeeds, we fill in the inode information
  * with d_instantiate(). 
  */
-static int ufs_create (struct inode * dir, struct dentry * dentry, int mode,
-		struct nameidata *nd)
+static int ufs_create (struct inode * dir, struct dentry * dentry, umode_t mode,
+		bool excl)
 {
-	struct inode * inode = ufs_new_inode(dir, mode);
-	int err = PTR_ERR(inode);
+	struct inode *inode;
+	int err;
+
+	UFSD("BEGIN\n");
+
+	inode = ufs_new_inode(dir, mode);
+	err = PTR_ERR(inode);
+
 	if (!IS_ERR(inode)) {
 		inode->i_op = &ufs_file_inode_operations;
 		inode->i_fop = &ufs_file_operations;
 		inode->i_mapping->a_ops = &ufs_aops;
 		mark_inode_dirty(inode);
-		lock_kernel();
+		lock_ufs(dir->i_sb);
 		err = ufs_add_nondir(dentry, inode);
-		unlock_kernel();
+		unlock_ufs(dir->i_sb);
 	}
+	UFSD("END: err=%d\n", err);
 	return err;
 }
 
-static int ufs_mknod (struct inode * dir, struct dentry *dentry, int mode, dev_t rdev)
+static int ufs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev)
 {
 	struct inode *inode;
 	int err;
 
 	if (!old_valid_dev(rdev))
 		return -EINVAL;
+
 	inode = ufs_new_inode(dir, mode);
 	err = PTR_ERR(inode);
 	if (!IS_ERR(inode)) {
 		init_special_inode(inode, mode, rdev);
-		/* NOTE: that'll go when we get wide dev_t */
 		ufs_set_inode_dev(inode->i_sb, UFS_I(inode), rdev);
 		mark_inode_dirty(inode);
-		lock_kernel();
+		lock_ufs(dir->i_sb);
 		err = ufs_add_nondir(dentry, inode);
-		unlock_kernel();
+		unlock_ufs(dir->i_sb);
 	}
 	return err;
 }
@@ -144,9 +124,9 @@ static int ufs_symlink (struct inode * dir, struct dentry * dentry,
 	struct inode * inode;
 
 	if (l > sb->s_blocksize)
-		goto out;
+		goto out_notlocked;
 
-	lock_kernel();
+	lock_ufs(dir->i_sb);
 	inode = ufs_new_inode(dir, S_IFLNK | S_IRWXUGO);
 	err = PTR_ERR(inode);
 	if (IS_ERR(inode))
@@ -154,7 +134,7 @@ static int ufs_symlink (struct inode * dir, struct dentry * dentry,
 
 	if (l > UFS_SB(sb)->s_uspi->s_maxsymlinklen) {
 		/* slow symlink */
-		inode->i_op = &page_symlink_inode_operations;
+		inode->i_op = &ufs_symlink_inode_operations;
 		inode->i_mapping->a_ops = &ufs_aops;
 		err = page_symlink(inode, symname, l);
 		if (err)
@@ -162,18 +142,19 @@ static int ufs_symlink (struct inode * dir, struct dentry * dentry,
 	} else {
 		/* fast symlink */
 		inode->i_op = &ufs_fast_symlink_inode_operations;
-		memcpy((char*)&UFS_I(inode)->i_u1.i_data,symname,l);
+		memcpy(UFS_I(inode)->i_u1.i_symlink, symname, l);
 		inode->i_size = l-1;
 	}
 	mark_inode_dirty(inode);
 
 	err = ufs_add_nondir(dentry, inode);
 out:
-	unlock_kernel();
+	unlock_ufs(dir->i_sb);
+out_notlocked:
 	return err;
 
 out_fail:
-	ufs_dec_count(inode);
+	inode_dec_link_count(inode);
 	iput(inode);
 	goto out;
 }
@@ -184,31 +165,24 @@ static int ufs_link (struct dentry * old_dentry, struct inode * dir,
 	struct inode *inode = old_dentry->d_inode;
 	int error;
 
-	lock_kernel();
-	if (inode->i_nlink >= UFS_LINK_MAX) {
-		unlock_kernel();
-		return -EMLINK;
-	}
+	lock_ufs(dir->i_sb);
 
 	inode->i_ctime = CURRENT_TIME_SEC;
-	ufs_inc_count(inode);
-	atomic_inc(&inode->i_count);
+	inode_inc_link_count(inode);
+	ihold(inode);
 
 	error = ufs_add_nondir(dentry, inode);
-	unlock_kernel();
+	unlock_ufs(dir->i_sb);
 	return error;
 }
 
-static int ufs_mkdir(struct inode * dir, struct dentry * dentry, int mode)
+static int ufs_mkdir(struct inode * dir, struct dentry * dentry, umode_t mode)
 {
 	struct inode * inode;
-	int err = -EMLINK;
-
-	if (dir->i_nlink >= UFS_LINK_MAX)
-		goto out;
+	int err;
 
-	lock_kernel();
-	ufs_inc_count(dir);
+	lock_ufs(dir->i_sb);
+	inode_inc_link_count(dir);
 
 	inode = ufs_new_inode(dir, S_IFDIR|mode);
 	err = PTR_ERR(inode);
@@ -217,8 +191,9 @@ static int ufs_mkdir(struct inode * dir, struct dentry * dentry, int mode)
 
 	inode->i_op = &ufs_dir_inode_operations;
 	inode->i_fop = &ufs_dir_operations;
+	inode->i_mapping->a_ops = &ufs_aops;
 
-	ufs_inc_count(inode);
+	inode_inc_link_count(inode);
 
 	err = ufs_make_empty(inode, dir);
 	if (err)
@@ -227,43 +202,41 @@ static int ufs_mkdir(struct inode * dir, struct dentry * dentry, int mode)
 	err = ufs_add_link(dentry, inode);
 	if (err)
 		goto out_fail;
-	unlock_kernel();
+	unlock_ufs(dir->i_sb);
 
 	d_instantiate(dentry, inode);
 out:
 	return err;
 
 out_fail:
-	ufs_dec_count(inode);
-	ufs_dec_count(inode);
+	inode_dec_link_count(inode);
+	inode_dec_link_count(inode);
 	iput (inode);
 out_dir:
-	ufs_dec_count(dir);
-	unlock_kernel();
+	inode_dec_link_count(dir);
+	unlock_ufs(dir->i_sb);
 	goto out;
 }
 
-static int ufs_unlink(struct inode * dir, struct dentry *dentry)
+static int ufs_unlink(struct inode *dir, struct dentry *dentry)
 {
 	struct inode * inode = dentry->d_inode;
-	struct buffer_head * bh;
-	struct ufs_dir_entry * de;
+	struct ufs_dir_entry *de;
+	struct page *page;
 	int err = -ENOENT;
 
-	lock_kernel();
-	de = ufs_find_entry (dentry, &bh);
+	de = ufs_find_entry(dir, &dentry->d_name, &page);
 	if (!de)
 		goto out;
 
-	err = ufs_delete_entry (dir, de, bh);
+	err = ufs_delete_entry(dir, de, page);
 	if (err)
 		goto out;
 
 	inode->i_ctime = dir->i_ctime;
-	ufs_dec_count(inode);
+	inode_dec_link_count(inode);
 	err = 0;
 out:
-	unlock_kernel();
 	return err;
 }
 
@@ -272,97 +245,95 @@ static int ufs_rmdir (struct inode * dir, struct dentry *dentry)
 	struct inode * inode = dentry->d_inode;
 	int err= -ENOTEMPTY;
 
-	lock_kernel();
+	lock_ufs(dir->i_sb);
 	if (ufs_empty_dir (inode)) {
 		err = ufs_unlink(dir, dentry);
 		if (!err) {
 			inode->i_size = 0;
-			ufs_dec_count(inode);
-			ufs_dec_count(dir);
+			inode_dec_link_count(inode);
+			inode_dec_link_count(dir);
 		}
 	}
-	unlock_kernel();
+	unlock_ufs(dir->i_sb);
 	return err;
 }
 
-static int ufs_rename (struct inode * old_dir, struct dentry * old_dentry,
-	struct inode * new_dir,	struct dentry * new_dentry )
+static int ufs_rename(struct inode *old_dir, struct dentry *old_dentry,
+		      struct inode *new_dir, struct dentry *new_dentry)
 {
 	struct inode *old_inode = old_dentry->d_inode;
 	struct inode *new_inode = new_dentry->d_inode;
-	struct buffer_head *dir_bh = NULL;
-	struct ufs_dir_entry *dir_de = NULL;
-	struct buffer_head *old_bh;
+	struct page *dir_page = NULL;
+	struct ufs_dir_entry * dir_de = NULL;
+	struct page *old_page;
 	struct ufs_dir_entry *old_de;
 	int err = -ENOENT;
 
-	lock_kernel();
-	old_de = ufs_find_entry (old_dentry, &old_bh);
+	old_de = ufs_find_entry(old_dir, &old_dentry->d_name, &old_page);
 	if (!old_de)
 		goto out;
 
 	if (S_ISDIR(old_inode->i_mode)) {
 		err = -EIO;
-		dir_de = ufs_dotdot(old_inode, &dir_bh);
+		dir_de = ufs_dotdot(old_inode, &dir_page);
 		if (!dir_de)
 			goto out_old;
 	}
 
 	if (new_inode) {
-		struct buffer_head *new_bh;
+		struct page *new_page;
 		struct ufs_dir_entry *new_de;
 
 		err = -ENOTEMPTY;
-		if (dir_de && !ufs_empty_dir (new_inode))
+		if (dir_de && !ufs_empty_dir(new_inode))
 			goto out_dir;
+
 		err = -ENOENT;
-		new_de = ufs_find_entry (new_dentry, &new_bh);
+		new_de = ufs_find_entry(new_dir, &new_dentry->d_name, &new_page);
 		if (!new_de)
 			goto out_dir;
-		ufs_inc_count(old_inode);
-		ufs_set_link(new_dir, new_de, new_bh, old_inode);
+		ufs_set_link(new_dir, new_de, new_page, old_inode);
 		new_inode->i_ctime = CURRENT_TIME_SEC;
 		if (dir_de)
-			new_inode->i_nlink--;
-		ufs_dec_count(new_inode);
+			drop_nlink(new_inode);
+		inode_dec_link_count(new_inode);
 	} else {
-		if (dir_de) {
-			err = -EMLINK;
-			if (new_dir->i_nlink >= UFS_LINK_MAX)
-				goto out_dir;
-		}
-		ufs_inc_count(old_inode);
 		err = ufs_add_link(new_dentry, old_inode);
-		if (err) {
-			ufs_dec_count(old_inode);
+		if (err)
 			goto out_dir;
-		}
 		if (dir_de)
-			ufs_inc_count(new_dir);
+			inode_inc_link_count(new_dir);
 	}
 
-	ufs_delete_entry (old_dir, old_de, old_bh);
+	/*
+	 * Like most other Unix systems, set the ctime for inodes on a
+ 	 * rename.
+	 */
+	old_inode->i_ctime = CURRENT_TIME_SEC;
 
-	ufs_dec_count(old_inode);
+	ufs_delete_entry(old_dir, old_de, old_page);
+	mark_inode_dirty(old_inode);
 
 	if (dir_de) {
-		ufs_set_link(old_inode, dir_de, dir_bh, new_dir);
-		ufs_dec_count(old_dir);
+		ufs_set_link(old_inode, dir_de, dir_page, new_dir);
+		inode_dec_link_count(old_dir);
 	}
-	unlock_kernel();
 	return 0;
 
+
 out_dir:
-	if (dir_de)
-		brelse(dir_bh);
+	if (dir_de) {
+		kunmap(dir_page);
+		page_cache_release(dir_page);
+	}
 out_old:
-	brelse (old_bh);
+	kunmap(old_page);
+	page_cache_release(old_page);
 out:
-	unlock_kernel();
 	return err;
 }
 
-struct inode_operations ufs_dir_inode_operations = {
+const struct inode_operations ufs_dir_inode_operations = {
 	.create		= ufs_create,
 	.lookup		= ufs_lookup,
 	.link		= ufs_link,