new helper: ihold()
[linux-2.6.git] / fs / bfs / dir.c
index 1fd056d..685ecff 100644 (file)
@@ -8,7 +8,6 @@
 #include <linux/time.h>
 #include <linux/string.h>
 #include <linux/fs.h>
-#include <linux/smp_lock.h>
 #include <linux/buffer_head.h>
 #include <linux/sched.h>
 #include "bfs.h"
@@ -32,16 +31,17 @@ static int bfs_readdir(struct file *f, void *dirent, filldir_t filldir)
        struct inode *dir = f->f_path.dentry->d_inode;
        struct buffer_head *bh;
        struct bfs_dirent *de;
+       struct bfs_sb_info *info = BFS_SB(dir->i_sb);
        unsigned int offset;
        int block;
 
-       lock_kernel();
+       mutex_lock(&info->bfs_lock);
 
        if (f->f_pos & (BFS_DIRENT_SIZE - 1)) {
                printf("Bad f_pos=%08lx for %s:%08lx\n",
                                        (unsigned long)f->f_pos,
                                        dir->i_sb->s_id, dir->i_ino);
-               unlock_kernel();
+               mutex_unlock(&info->bfs_lock);
                return -EBADF;
        }
 
@@ -61,7 +61,7 @@ static int bfs_readdir(struct file *f, void *dirent, filldir_t filldir)
                                                le16_to_cpu(de->ino),
                                                DT_UNKNOWN) < 0) {
                                        brelse(bh);
-                                       unlock_kernel();
+                                       mutex_unlock(&info->bfs_lock);
                                        return 0;
                                }
                        }
@@ -71,14 +71,15 @@ static int bfs_readdir(struct file *f, void *dirent, filldir_t filldir)
                brelse(bh);
        }
 
-       unlock_kernel();
+       mutex_unlock(&info->bfs_lock);
        return 0;       
 }
 
 const struct file_operations bfs_dir_operations = {
        .read           = generic_read_dir,
        .readdir        = bfs_readdir,
-       .fsync          = file_fsync,
+       .fsync          = generic_file_fsync,
+       .llseek         = generic_file_llseek,
 };
 
 extern void dump_imap(const char *, struct super_block *);
@@ -95,23 +96,21 @@ static int bfs_create(struct inode *dir, struct dentry *dentry, int mode,
        inode = new_inode(s);
        if (!inode)
                return -ENOSPC;
-       lock_kernel();
+       mutex_lock(&info->bfs_lock);
        ino = find_first_zero_bit(info->si_imap, info->si_lasti);
        if (ino > info->si_lasti) {
-               unlock_kernel();
+               mutex_unlock(&info->bfs_lock);
                iput(inode);
                return -ENOSPC;
        }
        set_bit(ino, info->si_imap);
        info->si_freei--;
-       inode->i_uid = current->fsuid;
-       inode->i_gid = (dir->i_mode & S_ISGID) ? dir->i_gid : current->fsgid;
+       inode_init_owner(inode, dir, mode);
        inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
        inode->i_blocks = 0;
        inode->i_op = &bfs_file_inops;
        inode->i_fop = &bfs_file_operations;
        inode->i_mapping->a_ops = &bfs_aops;
-       inode->i_mode = mode;
        inode->i_ino = ino;
        BFS_I(inode)->i_dsk_ino = ino;
        BFS_I(inode)->i_sblock = 0;
@@ -124,11 +123,11 @@ static int bfs_create(struct inode *dir, struct dentry *dentry, int mode,
                                                        inode->i_ino);
        if (err) {
                inode_dec_link_count(inode);
+               mutex_unlock(&info->bfs_lock);
                iput(inode);
-               unlock_kernel();
                return err;
        }
-       unlock_kernel();
+       mutex_unlock(&info->bfs_lock);
        d_instantiate(dentry, inode);
        return 0;
 }
@@ -139,22 +138,23 @@ static struct dentry *bfs_lookup(struct inode *dir, struct dentry *dentry,
        struct inode *inode = NULL;
        struct buffer_head *bh;
        struct bfs_dirent *de;
+       struct bfs_sb_info *info = BFS_SB(dir->i_sb);
 
        if (dentry->d_name.len > BFS_NAMELEN)
                return ERR_PTR(-ENAMETOOLONG);
 
-       lock_kernel();
+       mutex_lock(&info->bfs_lock);
        bh = bfs_find_entry(dir, dentry->d_name.name, dentry->d_name.len, &de);
        if (bh) {
                unsigned long ino = (unsigned long)le16_to_cpu(de->ino);
                brelse(bh);
-               inode = iget(dir->i_sb, ino);
-               if (!inode) {
-                       unlock_kernel();
-                       return ERR_PTR(-EACCES);
+               inode = bfs_iget(dir->i_sb, ino);
+               if (IS_ERR(inode)) {
+                       mutex_unlock(&info->bfs_lock);
+                       return ERR_CAST(inode);
                }
        }
-       unlock_kernel();
+       mutex_unlock(&info->bfs_lock);
        d_add(dentry, inode);
        return NULL;
 }
@@ -163,33 +163,34 @@ static int bfs_link(struct dentry *old, struct inode *dir,
                                                struct dentry *new)
 {
        struct inode *inode = old->d_inode;
+       struct bfs_sb_info *info = BFS_SB(inode->i_sb);
        int err;
 
-       lock_kernel();
+       mutex_lock(&info->bfs_lock);
        err = bfs_add_entry(dir, new->d_name.name, new->d_name.len,
                                                        inode->i_ino);
        if (err) {
-               unlock_kernel();
+               mutex_unlock(&info->bfs_lock);
                return err;
        }
        inc_nlink(inode);
        inode->i_ctime = CURRENT_TIME_SEC;
        mark_inode_dirty(inode);
-       atomic_inc(&inode->i_count);
+       ihold(inode);
        d_instantiate(new, inode);
-       unlock_kernel();
+       mutex_unlock(&info->bfs_lock);
        return 0;
 }
 
 static int bfs_unlink(struct inode *dir, struct dentry *dentry)
 {
        int error = -ENOENT;
-       struct inode *inode;
+       struct inode *inode = dentry->d_inode;
        struct buffer_head *bh;
        struct bfs_dirent *de;
+       struct bfs_sb_info *info = BFS_SB(inode->i_sb);
 
-       inode = dentry->d_inode;
-       lock_kernel();
+       mutex_lock(&info->bfs_lock);
        bh = bfs_find_entry(dir, dentry->d_name.name, dentry->d_name.len, &de);
        if (!bh || (le16_to_cpu(de->ino) != inode->i_ino))
                goto out_brelse;
@@ -201,7 +202,7 @@ static int bfs_unlink(struct inode *dir, struct dentry *dentry)
                inode->i_nlink = 1;
        }
        de->ino = 0;
-       mark_buffer_dirty(bh);
+       mark_buffer_dirty_inode(bh, dir);
        dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC;
        mark_inode_dirty(dir);
        inode->i_ctime = dir->i_ctime;
@@ -210,7 +211,7 @@ static int bfs_unlink(struct inode *dir, struct dentry *dentry)
 
 out_brelse:
        brelse(bh);
-       unlock_kernel();
+       mutex_unlock(&info->bfs_lock);
        return error;
 }
 
@@ -220,6 +221,7 @@ static int bfs_rename(struct inode *old_dir, struct dentry *old_dentry,
        struct inode *old_inode, *new_inode;
        struct buffer_head *old_bh, *new_bh;
        struct bfs_dirent *old_de, *new_de;
+       struct bfs_sb_info *info;
        int error = -ENOENT;
 
        old_bh = new_bh = NULL;
@@ -227,7 +229,9 @@ static int bfs_rename(struct inode *old_dir, struct dentry *old_dentry,
        if (S_ISDIR(old_inode->i_mode))
                return -EINVAL;
 
-       lock_kernel();
+       info = BFS_SB(old_inode->i_sb);
+
+       mutex_lock(&info->bfs_lock);
        old_bh = bfs_find_entry(old_dir, 
                                old_dentry->d_name.name, 
                                old_dentry->d_name.len, &old_de);
@@ -260,11 +264,11 @@ static int bfs_rename(struct inode *old_dir, struct dentry *old_dentry,
                new_inode->i_ctime = CURRENT_TIME_SEC;
                inode_dec_link_count(new_inode);
        }
-       mark_buffer_dirty(old_bh);
+       mark_buffer_dirty_inode(old_bh, old_dir);
        error = 0;
 
 end_rename:
-       unlock_kernel();
+       mutex_unlock(&info->bfs_lock);
        brelse(old_bh);
        brelse(new_bh);
        return error;
@@ -313,7 +317,7 @@ static int bfs_add_entry(struct inode *dir, const unsigned char *name,
                                for (i = 0; i < BFS_NAMELEN; i++)
                                        de->name[i] =
                                                (i < namelen) ? name[i] : 0;
-                               mark_buffer_dirty(bh);
+                               mark_buffer_dirty_inode(bh, dir);
                                brelse(bh);
                                return 0;
                        }