iget: stop EFS from using iget() and read_inode()

Stop the EFS filesystem from using iget() and read_inode().  Replace
efs_read_inode() with efs_iget(), and call that instead of iget().  efs_iget()
then uses iget_locked() directly and returns a proper error code instead of an
inode in the event of an error.

efs_fill_super() returns any error incurred when getting the root inode
instead of EACCES.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/efs/inode.c b/fs/efs/inode.c
index 174696f..627c302 100644 (file)
--- a/fs/efs/inode.c
+++ b/fs/efs/inode.c
@@ -45,17 +45,26 @@ static inline void extent_copy(efs_extent *src, efs_extent *dst) {
        return;
 }
 
-void efs_read_inode(struct inode *inode)
+struct inode *efs_iget(struct super_block *super, unsigned long ino)
 {
        int i, inode_index;
        dev_t device;
        u32 rdev;
        struct buffer_head *bh;
-       struct efs_sb_info    *sb = SUPER_INFO(inode->i_sb);
-       struct efs_inode_info *in = INODE_INFO(inode);
+       struct efs_sb_info    *sb = SUPER_INFO(super);
+       struct efs_inode_info *in;
        efs_block_t block, offset;
        struct efs_dinode *efs_inode;
-  
+       struct inode *inode;
+
+       inode = iget_locked(super, ino);
+       if (IS_ERR(inode))
+               return ERR_PTR(-ENOMEM);
+       if (!(inode->i_state & I_NEW))
+               return inode;
+
+       in = INODE_INFO(inode);
+
        /*
        ** EFS layout:
        **
@@ -159,13 +168,13 @@ void efs_read_inode(struct inode *inode)
                        break;
        }
 
-       return;
+       unlock_new_inode(inode);
+       return inode;
         
 read_inode_error:
        printk(KERN_WARNING "EFS: failed to read inode %lu\n", inode->i_ino);
-       make_bad_inode(inode);
-
-       return;
+       iget_failed(inode);
+       return ERR_PTR(-EIO);
 }
 
 static inline efs_block_t

diff --git a/fs/efs/namei.c b/fs/efs/namei.c
index f7f4070..e267047 100644 (file)
--- a/fs/efs/namei.c
+++ b/fs/efs/namei.c
@@ -66,9 +66,10 @@ struct dentry *efs_lookup(struct inode *dir, struct dentry *dentry, struct namei
        lock_kernel();
        inodenum = efs_find_entry(dir, dentry->d_name.name, dentry->d_name.len);
        if (inodenum) {
-               if (!(inode = iget(dir->i_sb, inodenum))) {
+               inode = efs_iget(dir->i_sb, inodenum);
+               if (IS_ERR(inode)) {
                        unlock_kernel();
-                       return ERR_PTR(-EACCES);
+                       return ERR_CAST(inode);
                }
        }
        unlock_kernel();
@@ -84,12 +85,11 @@ static struct inode *efs_nfs_get_inode(struct super_block *sb, u64 ino,
 
        if (ino == 0)
                return ERR_PTR(-ESTALE);
-       inode = iget(sb, ino);
-       if (inode == NULL)
-               return ERR_PTR(-ENOMEM);
+       inode = efs_iget(sb, ino);
+       if (IS_ERR(inode))
+               return ERR_CAST(inode);
 
-       if (is_bad_inode(inode) ||
-           (generation && inode->i_generation != generation)) {
+       if (generation && inode->i_generation != generation) {
                iput(inode);
                return ERR_PTR(-ESTALE);
        }
@@ -116,7 +116,7 @@ struct dentry *efs_get_parent(struct dentry *child)
        struct dentry *parent;
        struct inode *inode;
        efs_ino_t ino;
-       int error;
+       long error;
 
        lock_kernel();
 
@@ -125,10 +125,11 @@ struct dentry *efs_get_parent(struct dentry *child)
        if (!ino)
                goto fail;
 
-       error = -EACCES;
-       inode = iget(child->d_inode->i_sb, ino);
-       if (!inode)
+       inode = efs_iget(child->d_inode->i_sb, ino);
+       if (IS_ERR(inode)) {
+               error = PTR_ERR(inode);
                goto fail;
+       }
 
        error = -ENOMEM;
        parent = d_alloc_anon(inode);

diff --git a/fs/efs/super.c b/fs/efs/super.c
index c79bc62..1408240 100644 (file)
--- a/fs/efs/super.c
+++ b/fs/efs/super.c
@@ -107,7 +107,6 @@ static int efs_remount(struct super_block *sb, int *flags, char *data)
 static const struct super_operations efs_superblock_operations = {
        .alloc_inode    = efs_alloc_inode,
        .destroy_inode  = efs_destroy_inode,
-       .read_inode     = efs_read_inode,
        .put_super      = efs_put_super,
        .statfs         = efs_statfs,
        .remount_fs     = efs_remount,
@@ -247,6 +246,7 @@ static int efs_fill_super(struct super_block *s, void *d, int silent)
        struct efs_sb_info *sb;
        struct buffer_head *bh;
        struct inode *root;
+       int ret = -EINVAL;
 
        sb = kzalloc(sizeof(struct efs_sb_info), GFP_KERNEL);
        if (!sb)
@@ -303,12 +303,18 @@ static int efs_fill_super(struct super_block *s, void *d, int silent)
        }
        s->s_op   = &efs_superblock_operations;
        s->s_export_op = &efs_export_ops;
-       root = iget(s, EFS_ROOTINODE);
+       root = efs_iget(s, EFS_ROOTINODE);
+       if (IS_ERR(root)) {
+               printk(KERN_ERR "EFS: get root inode failed\n");
+               ret = PTR_ERR(root);
+               goto out_no_fs;
+       }
+
        s->s_root = d_alloc_root(root);
- 
        if (!(s->s_root)) {
-               printk(KERN_ERR "EFS: get root inode failed\n");
+               printk(KERN_ERR "EFS: get root dentry failed\n");
                iput(root);
+               ret = -ENOMEM;
                goto out_no_fs;
        }
 
@@ -318,7 +324,7 @@ out_no_fs_ul:
 out_no_fs:
        s->s_fs_info = NULL;
        kfree(sb);
-       return -EINVAL;
+       return ret;
 }
 
 static int efs_statfs(struct dentry *dentry, struct kstatfs *buf) {

diff --git a/include/linux/efs_fs.h b/include/linux/efs_fs.h
index dd57fe5..a695d63 100644 (file)
--- a/include/linux/efs_fs.h
+++ b/include/linux/efs_fs.h
@@ -41,7 +41,7 @@ extern const struct inode_operations efs_dir_inode_operations;
 extern const struct file_operations efs_dir_operations;
 extern const struct address_space_operations efs_symlink_aops;
 
-extern void efs_read_inode(struct inode *);
+extern struct inode *efs_iget(struct super_block *, unsigned long);
 extern efs_block_t efs_map_block(struct inode *, efs_block_t);
 extern int efs_get_block(struct inode *, sector_t, struct buffer_head *, int);