Sync with Linux 2.1.46.

1 files changed, 125 insertions, 168 deletions

diff --git a/fs/minix/namei.c b/fs/minix/namei.c
index b6041ad92..718d3dd07 100644
--- a/fs/minix/namei.c
+++ b/fs/minix/namei.c
@@ -47,9 +47,6 @@ static int minix_match(int len, const char * name,
 	*offset += info->s_dirsize;
 	if (!de->inode || len > info->s_namelen)
 		return 0;
-	/* "" means "." ---> so paths like "/usr/lib//libc.a" work */
-	if (!len && (de->name[0]=='.') && (de->name[1]=='\0'))
-		return 1;
 	return namecompare(len,info->s_namelen,name,de->name);
 }
 
@@ -104,31 +101,22 @@ static struct buffer_head * minix_find_entry(struct inode * dir,
 	return NULL;
 }
 
-int minix_lookup(struct inode * dir,const char * name, int len,
-	struct inode ** result)
+int minix_lookup(struct inode * dir, struct dentry *dentry)
 {
-	int ino;
+	struct inode * inode = NULL;
 	struct minix_dir_entry * de;
 	struct buffer_head * bh;
 
-	*result = NULL;
-	if (!dir)
-		return -ENOENT;
-	if (!S_ISDIR(dir->i_mode)) {
-		iput(dir);
-		return -ENOENT;
-	}
-	if (!(bh = minix_find_entry(dir,name,len,&de))) {
-		iput(dir);
-		return -ENOENT;
-	}
-	ino = de->inode;
-	brelse(bh);
-	if (!(*result = iget(dir->i_sb,ino))) {
-		iput(dir);
-		return -EACCES;
-	}
-	iput(dir);
+	bh = minix_find_entry(dir, dentry->d_name.name, dentry->d_name.len, &de);
+	if (bh) {
+		unsigned long ino = le32_to_cpu(de->inode);
+		brelse (bh);
+		inode = iget(dir->i_sb, ino);
+ 
+		if (!inode)
+			return -EACCES;
+	}
+	d_add(dentry, inode);
 	return 0;
 }
 
@@ -180,7 +168,7 @@ static int minix_add_entry(struct inode * dir,
 		if (block*bh->b_size + offset > dir->i_size) {
 			de->inode = 0;
 			dir->i_size = block*bh->b_size + offset;
-			dir->i_dirt = 1;
+			mark_inode_dirty(dir);
 		}
 		if (de->inode) {
 			if (namecompare(namelen, info->s_namelen, name, de->name)) {
@@ -189,7 +177,7 @@ static int minix_add_entry(struct inode * dir,
 			}
 		} else {
 			dir->i_mtime = dir->i_ctime = CURRENT_TIME;
-			dir->i_dirt = 1;
+			mark_inode_dirty(dir);
 			for (i = 0; i < info->s_namelen ; i++)
 				de->name[i] = (i < namelen) ? name[i] : 0;
 			dir->i_version = ++event;
@@ -208,42 +196,37 @@ static int minix_add_entry(struct inode * dir,
 	return 0;
 }
 
-int minix_create(struct inode * dir,const char * name, int len, int mode,
-	struct inode ** result)
+int minix_create(struct inode * dir, struct dentry *dentry, int mode)
 {
 	int error;
 	struct inode * inode;
 	struct buffer_head * bh;
 	struct minix_dir_entry * de;
 
-	*result = NULL;
 	if (!dir)
 		return -ENOENT;
 	inode = minix_new_inode(dir);
-	if (!inode) {
-		iput(dir);
+	if (!inode)
 		return -ENOSPC;
-	}
 	inode->i_op = &minix_file_inode_operations;
 	inode->i_mode = mode;
-	inode->i_dirt = 1;
-	error = minix_add_entry(dir,name,len, &bh ,&de);
+	mark_inode_dirty(inode);
+	error = minix_add_entry(dir, dentry->d_name.name,
+				dentry->d_name.len, &bh ,&de);
 	if (error) {
 		inode->i_nlink--;
-		inode->i_dirt = 1;
+		mark_inode_dirty(inode);
 		iput(inode);
-		iput(dir);
 		return error;
 	}
 	de->inode = inode->i_ino;
 	mark_buffer_dirty(bh, 1);
 	brelse(bh);
-	iput(dir);
-	*result = inode;
+	d_instantiate(dentry, inode);
 	return 0;
 }
 
-int minix_mknod(struct inode * dir, const char * name, int len, int mode, int rdev)
+int minix_mknod(struct inode * dir, struct dentry *dentry, int mode, int rdev)
 {
 	int error;
 	struct inode * inode;
@@ -252,17 +235,15 @@ int minix_mknod(struct inode * dir, const char * name, int len, int mode, int rd
 
 	if (!dir)
 		return -ENOENT;
-	bh = minix_find_entry(dir,name,len,&de);
+	bh = minix_find_entry(dir, dentry->d_name.name,
+			      dentry->d_name.len, &de);
 	if (bh) {
 		brelse(bh);
-		iput(dir);
 		return -EEXIST;
 	}
 	inode = minix_new_inode(dir);
-	if (!inode) {
-		iput(dir);
+	if (!inode)
 		return -ENOSPC;
-	}
 	inode->i_uid = current->fsuid;
 	inode->i_mode = mode;
 	inode->i_op = NULL;
@@ -283,24 +264,22 @@ int minix_mknod(struct inode * dir, const char * name, int len, int mode, int rd
 		init_fifo(inode);
 	if (S_ISBLK(mode) || S_ISCHR(mode))
 		inode->i_rdev = to_kdev_t(rdev);
-	inode->i_dirt = 1;
-	error = minix_add_entry(dir, name, len, &bh, &de);
+	mark_inode_dirty(inode);
+	error = minix_add_entry(dir, dentry->d_name.name, dentry->d_name.len, &bh, &de);
 	if (error) {
 		inode->i_nlink--;
-		inode->i_dirt = 1;
+		mark_inode_dirty(inode);
 		iput(inode);
-		iput(dir);
 		return error;
 	}
 	de->inode = inode->i_ino;
 	mark_buffer_dirty(bh, 1);
 	brelse(bh);
-	iput(dir);
-	iput(inode);
+	d_instantiate(dentry, inode);
 	return 0;
 }
 
-int minix_mkdir(struct inode * dir, const char * name, int len, int mode)
+int minix_mkdir(struct inode * dir, struct dentry *dentry, int mode)
 {
 	int error;
 	struct inode * inode;
@@ -308,33 +287,26 @@ int minix_mkdir(struct inode * dir, const char * name, int len, int mode)
 	struct minix_dir_entry * de;
 	struct minix_sb_info * info;
 
-	if (!dir || !dir->i_sb) {
-		iput(dir);
+	if (!dir || !dir->i_sb)
 		return -EINVAL;
-	}
 	info = &dir->i_sb->u.minix_sb;
-	bh = minix_find_entry(dir,name,len,&de);
+	bh = minix_find_entry(dir, dentry->d_name.name,
+			      dentry->d_name.len, &de);
 	if (bh) {
 		brelse(bh);
-		iput(dir);
 		return -EEXIST;
 	}
-	if (dir->i_nlink >= MINIX_LINK_MAX) {
-		iput(dir);
+	if (dir->i_nlink >= MINIX_LINK_MAX)
 		return -EMLINK;
-	}
 	inode = minix_new_inode(dir);
-	if (!inode) {
-		iput(dir);
+	if (!inode)
 		return -ENOSPC;
-	}
 	inode->i_op = &minix_dir_inode_operations;
 	inode->i_size = 2 * info->s_dirsize;
 	dir_block = minix_bread(inode,0,1);
 	if (!dir_block) {
-		iput(dir);
 		inode->i_nlink--;
-		inode->i_dirt = 1;
+		mark_inode_dirty(inode);
 		iput(inode);
 		return -ENOSPC;
 	}
@@ -350,10 +322,10 @@ int minix_mkdir(struct inode * dir, const char * name, int len, int mode)
 	inode->i_mode = S_IFDIR | (mode & 0777 & ~current->fs->umask);
 	if (dir->i_mode & S_ISGID)
 		inode->i_mode |= S_ISGID;
-	inode->i_dirt = 1;
-	error = minix_add_entry(dir, name, len, &bh, &de);
+	mark_inode_dirty(inode);
+	error = minix_add_entry(dir, dentry->d_name.name,
+				dentry->d_name.len, &bh, &de);
 	if (error) {
-		iput(dir);
 		inode->i_nlink=0;
 		iput(inode);
 		return error;
@@ -361,10 +333,9 @@ int minix_mkdir(struct inode * dir, const char * name, int len, int mode)
 	de->inode = inode->i_ino;
 	mark_buffer_dirty(bh, 1);
 	dir->i_nlink++;
-	dir->i_dirt = 1;
-	iput(dir);
-	iput(inode);
+	mark_inode_dirty(dir);
 	brelse(bh);
+	d_instantiate(dentry, inode);
 	return 0;
 }
 
@@ -427,7 +398,7 @@ bad_dir:
 	return 1;
 }
 
-int minix_rmdir(struct inode * dir, const char * name, int len)
+int minix_rmdir(struct inode * dir, struct dentry *dentry)
 {
 	int retval;
 	struct inode * inode;
@@ -435,13 +406,14 @@ int minix_rmdir(struct inode * dir, const char * name, int len)
 	struct minix_dir_entry * de;
 
 	inode = NULL;
-	bh = minix_find_entry(dir,name,len,&de);
+	bh = minix_find_entry(dir, dentry->d_name.name,
+			      dentry->d_name.len, &de);
 	retval = -ENOENT;
 	if (!bh)
 		goto end_rmdir;
 	retval = -EPERM;
-	if (!(inode = iget(dir->i_sb, de->inode)))
-		goto end_rmdir;
+	inode = dentry->d_inode;
+
         if ((dir->i_mode & S_ISVTX) && !fsuser() &&
             current->fsuid != inode->i_uid &&
             current->fsuid != dir->i_uid)
@@ -462,7 +434,7 @@ int minix_rmdir(struct inode * dir, const char * name, int len)
 		retval = -ENOENT;
 		goto end_rmdir;
 	}
-	if (atomic_read(&inode->i_count) > 1) {
+	if (inode->i_count > 1) {
 		retval = -EBUSY;
 		goto end_rmdir;
 	}
@@ -472,19 +444,18 @@ int minix_rmdir(struct inode * dir, const char * name, int len)
 	dir->i_version = ++event;
 	mark_buffer_dirty(bh, 1);
 	inode->i_nlink=0;
-	inode->i_dirt=1;
+	mark_inode_dirty(inode);
 	inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME;
 	dir->i_nlink--;
-	dir->i_dirt=1;
+	mark_inode_dirty(dir);
+	d_delete(dentry);
 	retval = 0;
 end_rmdir:
-	iput(dir);
-	iput(inode);
 	brelse(bh);
 	return retval;
 }
 
-int minix_unlink(struct inode * dir, const char * name, int len)
+int minix_unlink(struct inode * dir, struct dentry *dentry)
 {
 	int retval;
 	struct inode * inode;
@@ -494,16 +465,16 @@ int minix_unlink(struct inode * dir, const char * name, int len)
 repeat:
 	retval = -ENOENT;
 	inode = NULL;
-	bh = minix_find_entry(dir,name,len,&de);
+	bh = minix_find_entry(dir, dentry->d_name.name,
+			      dentry->d_name.len, &de);
 	if (!bh)
 		goto end_unlink;
-	if (!(inode = iget(dir->i_sb, de->inode)))
-		goto end_unlink;
+	inode = dentry->d_inode;
+
 	retval = -EPERM;
 	if (S_ISDIR(inode->i_mode))
 		goto end_unlink;
 	if (de->inode != inode->i_ino) {
-		iput(inode);
 		brelse(bh);
 		current->counter = 0;
 		schedule();
@@ -527,19 +498,19 @@ repeat:
 	dir->i_version = ++event;
 	mark_buffer_dirty(bh, 1);
 	dir->i_ctime = dir->i_mtime = CURRENT_TIME;
-	dir->i_dirt = 1;
+	mark_inode_dirty(dir);
 	inode->i_nlink--;
 	inode->i_ctime = dir->i_ctime;
-	inode->i_dirt = 1;
+	mark_inode_dirty(inode);
+	d_delete(dentry);	/* This also frees the inode */
 	retval = 0;
 end_unlink:
 	brelse(bh);
-	iput(inode);
-	iput(dir);
 	return retval;
 }
 
-int minix_symlink(struct inode * dir, const char * name, int len, const char * symname)
+int minix_symlink(struct inode * dir, struct dentry *dentry,
+		  const char * symname)
 {
 	struct minix_dir_entry * de;
 	struct inode * inode = NULL;
@@ -547,17 +518,15 @@ int minix_symlink(struct inode * dir, const char * name, int len, const char * s
 	int i;
 	char c;
 
-	if (!(inode = minix_new_inode(dir))) {
-		iput(dir);
+	if (!(inode = minix_new_inode(dir)))
 		return -ENOSPC;
-	}
+
 	inode->i_mode = S_IFLNK | 0777;
 	inode->i_op = &minix_symlink_inode_operations;
 	name_block = minix_bread(inode,0,1);
 	if (!name_block) {
-		iput(dir);
 		inode->i_nlink--;
-		inode->i_dirt = 1;
+	        mark_inode_dirty(inode);
 		iput(inode);
 		return -ENOSPC;
 	}
@@ -568,93 +537,81 @@ int minix_symlink(struct inode * dir, const char * name, int len, const char * s
 	mark_buffer_dirty(name_block, 1);
 	brelse(name_block);
 	inode->i_size = i;
-	inode->i_dirt = 1;
-	bh = minix_find_entry(dir,name,len,&de);
+	mark_inode_dirty(inode);
+	bh = minix_find_entry(dir, dentry->d_name.name,
+			      dentry->d_name.len, &de);
 	if (bh) {
 		inode->i_nlink--;
-		inode->i_dirt = 1;
+		mark_inode_dirty(inode);
 		iput(inode);
 		brelse(bh);
-		iput(dir);
 		return -EEXIST;
 	}
-	i = minix_add_entry(dir, name, len, &bh, &de);
+	i = minix_add_entry(dir, dentry->d_name.name,
+			    dentry->d_name.len, &bh, &de);
 	if (i) {
 		inode->i_nlink--;
-		inode->i_dirt = 1;
+		mark_inode_dirty(inode);
 		iput(inode);
-		iput(dir);
 		return i;
 	}
 	de->inode = inode->i_ino;
 	mark_buffer_dirty(bh, 1);
 	brelse(bh);
-	iput(dir);
-	iput(inode);
+	d_instantiate(dentry, inode);
 	return 0;
 }
 
-int minix_link(struct inode * oldinode, struct inode * dir, const char * name, int len)
+int minix_link(struct inode * inode, struct inode * dir,
+	       struct dentry *dentry)
 {
 	int error;
 	struct minix_dir_entry * de;
 	struct buffer_head * bh;
 
-	if (S_ISDIR(oldinode->i_mode)) {
-		iput(oldinode);
-		iput(dir);
+	if (S_ISDIR(inode->i_mode))
 		return -EPERM;
-	}
-	if (oldinode->i_nlink >= MINIX_LINK_MAX) {
-		iput(oldinode);
-		iput(dir);
+
+	if (inode->i_nlink >= MINIX_LINK_MAX)
 		return -EMLINK;
-	}
-	bh = minix_find_entry(dir,name,len,&de);
+
+	bh = minix_find_entry(dir, dentry->d_name.name,
+			      dentry->d_name.len, &de);
 	if (bh) {
 		brelse(bh);
-		iput(dir);
-		iput(oldinode);
 		return -EEXIST;
 	}
-	error = minix_add_entry(dir, name, len, &bh, &de);
+	error = minix_add_entry(dir, dentry->d_name.name,
+				dentry->d_name.len, &bh, &de);
 	if (error) {
-		iput(dir);
-		iput(oldinode);
+		brelse(bh);
 		return error;
 	}
-	de->inode = oldinode->i_ino;
+	de->inode = inode->i_ino;
 	mark_buffer_dirty(bh, 1);
 	brelse(bh);
-	iput(dir);
-	oldinode->i_nlink++;
-	oldinode->i_ctime = CURRENT_TIME;
-	oldinode->i_dirt = 1;
-	iput(oldinode);
+	inode->i_nlink++;
+	inode->i_ctime = CURRENT_TIME;
+	mark_inode_dirty(inode);
+	d_instantiate(dentry, inode);
 	return 0;
 }
 
-static int subdir(struct inode * new_inode, struct inode * old_inode)
+static int subdir(struct dentry * new_dentry, struct dentry * old_dentry)
 {
-	int ino;
-	int result;
+	int result = 0;
 
-	atomic_inc(&new_inode->i_count);
-	result = 0;
 	for (;;) {
-		if (new_inode == old_inode) {
-			result = 1;
-			break;
+		if (new_dentry != old_dentry) {
+			struct dentry * parent = new_dentry->d_parent;
+			if (parent == new_dentry)
+				break;
+			new_dentry = parent;
+			continue;
 		}
-		if (new_inode->i_dev != old_inode->i_dev)
-			break;
-		ino = new_inode->i_ino;
-		if (minix_lookup(new_inode,"..",2,&new_inode))
-			break;
-		if (new_inode->i_ino == ino)
-			break;
+		result = 1;
+		break;
 	}
-	iput(new_inode);
 	return result;
 }
 
@@ -671,8 +628,8 @@ static int subdir(struct inode * new_inode, struct inode * old_inode)
  * Anybody can rename anything with this: the permission checks are left to the
  * higher-level routines.
  */
-static int do_minix_rename(struct inode * old_dir, const char * old_name, int old_len,
-			   struct inode * new_dir, const char * new_name, int new_len)
+static int do_minix_rename(struct inode * old_dir, struct dentry *old_dentry,
+			   struct inode * new_dir, struct dentry *new_dentry)
 {
 	struct inode * old_inode, * new_inode;
 	struct buffer_head * old_bh, * new_bh, * dir_bh;
@@ -686,28 +643,26 @@ try_again:
 	brelse(old_bh);
 	brelse(new_bh);
 	brelse(dir_bh);
-	iput(old_inode);
-	iput(new_inode);
 	current->counter = 0;
 	schedule();
 start_up:
 	old_inode = new_inode = NULL;
 	old_bh = new_bh = dir_bh = NULL;
-	old_bh = minix_find_entry(old_dir,old_name,old_len,&old_de);
+	old_bh = minix_find_entry(old_dir, old_dentry->d_name.name,
+				  old_dentry->d_name.len, &old_de);
 	retval = -ENOENT;
 	if (!old_bh)
 		goto end_rename;
-	old_inode = __iget(old_dir->i_sb, old_de->inode,0); /* don't cross mnt-points */
-	if (!old_inode)
-		goto end_rename;
+	old_inode = old_dentry->d_inode;
 	retval = -EPERM;
 	if ((old_dir->i_mode & S_ISVTX) && 
 	    current->fsuid != old_inode->i_uid &&
 	    current->fsuid != old_dir->i_uid && !fsuser())
 		goto end_rename;
-	new_bh = minix_find_entry(new_dir,new_name,new_len,&new_de);
+	new_inode = new_dentry->d_inode;
+	new_bh = minix_find_entry(new_dir, new_dentry->d_name.name,
+				  new_dentry->d_name.len, &new_de);
 	if (new_bh) {
-		new_inode = __iget(new_dir->i_sb, new_de->inode, 0);
 		if (!new_inode) {
 			brelse(new_bh);
 			new_bh = NULL;
@@ -722,13 +677,13 @@ start_up:
 		if (!S_ISDIR(old_inode->i_mode))
 			goto end_rename;
 		retval = -EINVAL;
-		if (subdir(new_dir, old_inode))
+		if (subdir(new_dentry, old_dentry))
 			goto end_rename;
 		retval = -ENOTEMPTY;
 		if (!empty_dir(new_inode))
 			goto end_rename;
 		retval = -EBUSY;
-		if (atomic_read(&new_inode->i_count) > 1)
+		if (new_inode->i_count > 1)
 			goto end_rename;
 	}
 	retval = -EPERM;
@@ -741,7 +696,7 @@ start_up:
 		if (new_inode && !S_ISDIR(new_inode->i_mode))
 			goto end_rename;
 		retval = -EINVAL;
-		if (subdir(new_dir, old_inode))
+		if (subdir(new_dentry, old_dentry))
 			goto end_rename;
 		retval = -EIO;
 		dir_bh = minix_bread(old_inode,0,0);
@@ -754,7 +709,10 @@ start_up:
 			goto end_rename;
 	}
 	if (!new_bh) {
-		retval = minix_add_entry(new_dir,new_name,new_len,&new_bh,&new_de);
+		retval = minix_add_entry(new_dir,
+					 new_dentry->d_name.name,
+					 new_dentry->d_name.len,
+					 &new_bh, &new_de);
 		if (retval)
 			goto end_rename;
 	}
@@ -769,15 +727,15 @@ start_up:
 	old_de->inode = 0;
 	new_de->inode = old_inode->i_ino;
 	old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
-	old_dir->i_dirt = 1;
+	mark_inode_dirty(old_dir);
 	old_dir->i_version = ++event;
 	new_dir->i_ctime = new_dir->i_mtime = CURRENT_TIME;
-	new_dir->i_dirt = 1;
+	mark_inode_dirty(new_dir);
 	new_dir->i_version = ++event;
 	if (new_inode) {
 		new_inode->i_nlink--;
 		new_inode->i_ctime = CURRENT_TIME;
-		new_inode->i_dirt = 1;
+		mark_inode_dirty(new_inode);
 	}
 	mark_buffer_dirty(old_bh, 1);
 	mark_buffer_dirty(new_bh, 1);
@@ -785,24 +743,23 @@ start_up:
 		PARENT_INO(dir_bh->b_data) = new_dir->i_ino;
 		mark_buffer_dirty(dir_bh, 1);
 		old_dir->i_nlink--;
-		old_dir->i_dirt = 1;
+		mark_inode_dirty(old_dir);
 		if (new_inode) {
 			new_inode->i_nlink--;
-			new_inode->i_dirt = 1;
+			mark_inode_dirty(new_inode);
 		} else {
 			new_dir->i_nlink++;
-			new_dir->i_dirt = 1;
+			mark_inode_dirty(new_dir);
 		}
 	}
+	/* Update the dcache */
+	d_move(old_dentry, new_dentry->d_parent, &new_dentry->d_name);
+	d_delete(new_dentry);
 	retval = 0;
 end_rename:
 	brelse(dir_bh);
 	brelse(old_bh);
 	brelse(new_bh);
-	iput(old_inode);
-	iput(new_inode);
-	iput(old_dir);
-	iput(new_dir);
 	return retval;
 }
 
@@ -815,8 +772,8 @@ end_rename:
  * the same device that races occur: many renames can happen at once, as long
  * as they are on different partitions.
  */
-int minix_rename(struct inode * old_dir, const char * old_name, int old_len,
-		 struct inode * new_dir, const char * new_name, int new_len)
+int minix_rename(struct inode * old_dir, struct dentry *old_dentry,
+		 struct inode * new_dir, struct dentry *new_dentry)
 {
 	static struct wait_queue * wait = NULL;
 	static int lock = 0;
@@ -825,8 +782,8 @@ int minix_rename(struct inode * old_dir, const char * old_name, int old_len,
 	while (lock)
 		sleep_on(&wait);
 	lock = 1;
-	result = do_minix_rename(old_dir, old_name, old_len,
-				 new_dir, new_name, new_len);
+	result = do_minix_rename(old_dir, old_dentry,
+				 new_dir, new_dentry);
 	lock = 0;
 	wake_up(&wait);
 	return result;