ext4: switch to ->iterate_shared()

Note that we need relax_dir() equivalent for directories
locked shared.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c
index 561d730..5d00bf0 100644 (file)
--- a/fs/ext4/dir.c
+++ b/fs/ext4/dir.c
@@ -266,7 +266,7 @@ static int ext4_readdir(struct file *file, struct dir_context *ctx)
                        ctx->pos += ext4_rec_len_from_disk(de->rec_len,
                                                sb->s_blocksize);
                }
-               if ((ctx->pos < inode->i_size) && !dir_relax(inode))
+               if ((ctx->pos < inode->i_size) && !dir_relax_shared(inode))
                        goto done;
                brelse(bh);
                bh = NULL;
@@ -644,7 +644,7 @@ int ext4_check_all_de(struct inode *dir, struct buffer_head *bh, void *buf,
 const struct file_operations ext4_dir_operations = {
        .llseek         = ext4_dir_llseek,
        .read           = generic_read_dir,
-       .iterate        = ext4_readdir,
+       .iterate_shared = ext4_readdir,
        .unlocked_ioctl = ext4_ioctl,
 #ifdef CONFIG_COMPAT
        .compat_ioctl   = ext4_compat_ioctl,

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 3dc0258..e87245a 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -3134,6 +3134,13 @@ static inline bool dir_relax(struct inode *inode)
        return !IS_DEADDIR(inode);
 }
 
+static inline bool dir_relax_shared(struct inode *inode)
+{
+       inode_unlock_shared(inode);
+       inode_lock_shared(inode);
+       return !IS_DEADDIR(inode);
+}
+
 extern bool path_noexec(const struct path *path);
 extern void inode_nohighmem(struct inode *inode);