[readdir] convert affs

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

diff --git a/fs/affs/dir.c b/fs/affs/dir.c
index fd11a6d..f1eba8c 100644 (file)
--- a/fs/affs/dir.c
+++ b/fs/affs/dir.c
@@ -15,12 +15,12 @@
 
 #include "affs.h"
 
-static int affs_readdir(struct file *, void *, filldir_t);
+static int affs_readdir(struct file *, struct dir_context *);
 
 const struct file_operations affs_dir_operations = {
        .read           = generic_read_dir,
        .llseek         = generic_file_llseek,
-       .readdir        = affs_readdir,
+       .iterate        = affs_readdir,
        .fsync          = affs_file_fsync,
 };
 
@@ -40,52 +40,35 @@ const struct inode_operations affs_dir_inode_operations = {
 };
 
 static int
-affs_readdir(struct file *filp, void *dirent, filldir_t filldir)
+affs_readdir(struct file *file, struct dir_context *ctx)
 {
-       struct inode            *inode = file_inode(filp);
+       struct inode            *inode = file_inode(file);
        struct super_block      *sb = inode->i_sb;
-       struct buffer_head      *dir_bh;
-       struct buffer_head      *fh_bh;
+       struct buffer_head      *dir_bh = NULL;
+       struct buffer_head      *fh_bh = NULL;
        unsigned char           *name;
        int                      namelen;
        u32                      i;
        int                      hash_pos;
        int                      chain_pos;
-       u32                      f_pos;
        u32                      ino;
-       int                      stored;
-       int                      res;
 
-       pr_debug("AFFS: readdir(ino=%lu,f_pos=%lx)\n",inode->i_ino,(unsigned long)filp->f_pos);
+       pr_debug("AFFS: readdir(ino=%lu,f_pos=%lx)\n",inode->i_ino,(unsigned long)ctx->pos);
 
-       stored = 0;
-       res    = -EIO;
-       dir_bh = NULL;
-       fh_bh  = NULL;
-       f_pos  = filp->f_pos;
-
-       if (f_pos == 0) {
-               filp->private_data = (void *)0;
-               if (filldir(dirent, ".", 1, f_pos, inode->i_ino, DT_DIR) < 0)
+       if (ctx->pos < 2) {
+               file->private_data = (void *)0;
+               if (!dir_emit_dots(file, ctx))
                        return 0;
-               filp->f_pos = f_pos = 1;
-               stored++;
-       }
-       if (f_pos == 1) {
-               if (filldir(dirent, "..", 2, f_pos, parent_ino(filp->f_path.dentry), DT_DIR) < 0)
-                       return stored;
-               filp->f_pos = f_pos = 2;
-               stored++;
        }
 
        affs_lock_dir(inode);
-       chain_pos = (f_pos - 2) & 0xffff;
-       hash_pos  = (f_pos - 2) >> 16;
+       chain_pos = (ctx->pos - 2) & 0xffff;
+       hash_pos  = (ctx->pos - 2) >> 16;
        if (chain_pos == 0xffff) {
                affs_warning(sb, "readdir", "More than 65535 entries in chain");
                chain_pos = 0;
                hash_pos++;
-               filp->f_pos = ((hash_pos << 16) | chain_pos) + 2;
+               ctx->pos = ((hash_pos << 16) | chain_pos) + 2;
        }
        dir_bh = affs_bread(sb, inode->i_ino);
        if (!dir_bh)
@@ -94,8 +77,8 @@ affs_readdir(struct file *filp, void *dirent, filldir_t filldir)
        /* If the directory hasn't changed since the last call to readdir(),
         * we can jump directly to where we left off.
         */
-       ino = (u32)(long)filp->private_data;
-       if (ino && filp->f_version == inode->i_version) {
+       ino = (u32)(long)file->private_data;
+       if (ino && file->f_version == inode->i_version) {
                pr_debug("AFFS: readdir() left off=%d\n", ino);
                goto inside;
        }
@@ -105,7 +88,7 @@ affs_readdir(struct file *filp, void *dirent, filldir_t filldir)
                fh_bh = affs_bread(sb, ino);
                if (!fh_bh) {
                        affs_error(sb, "readdir","Cannot read block %d", i);
-                       goto readdir_out;
+                       return -EIO;
                }
                ino = be32_to_cpu(AFFS_TAIL(sb, fh_bh)->hash_chain);
                affs_brelse(fh_bh);
@@ -119,38 +102,34 @@ affs_readdir(struct file *filp, void *dirent, filldir_t filldir)
                ino = be32_to_cpu(AFFS_HEAD(dir_bh)->table[hash_pos]);
                if (!ino)
                        continue;
-               f_pos = (hash_pos << 16) + 2;
+               ctx->pos = (hash_pos << 16) + 2;
 inside:
                do {
                        fh_bh = affs_bread(sb, ino);
                        if (!fh_bh) {
                                affs_error(sb, "readdir","Cannot read block %d", ino);
-                               goto readdir_done;
+                               break;
                        }
 
                        namelen = min(AFFS_TAIL(sb, fh_bh)->name[0], (u8)30);
                        name = AFFS_TAIL(sb, fh_bh)->name + 1;
                        pr_debug("AFFS: readdir(): filldir(\"%.*s\", ino=%u), hash=%d, f_pos=%x\n",
-                                namelen, name, ino, hash_pos, f_pos);
-                       if (filldir(dirent, name, namelen, f_pos, ino, DT_UNKNOWN) < 0)
+                                namelen, name, ino, hash_pos, (u32)ctx->pos);
+                       if (!dir_emit(ctx, name, namelen, ino, DT_UNKNOWN))
                                goto readdir_done;
-                       stored++;
-                       f_pos++;
+                       ctx->pos++;
                        ino = be32_to_cpu(AFFS_TAIL(sb, fh_bh)->hash_chain);
                        affs_brelse(fh_bh);
                        fh_bh = NULL;
                } while (ino);
        }
 readdir_done:
-       filp->f_pos = f_pos;
-       filp->f_version = inode->i_version;
-       filp->private_data = (void *)(long)ino;
-       res = stored;
+       file->f_version = inode->i_version;
+       file->private_data = (void *)(long)ino;
 
 readdir_out:
        affs_brelse(dir_bh);
        affs_brelse(fh_bh);
        affs_unlock_dir(inode);
-       pr_debug("AFFS: readdir()=%d\n", stored);
-       return res;
+       return 0;
 }