From 81b9f66e6b5cd8bc8aa4502dc69a923b3e68f664 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Thu, 16 May 2013 13:41:48 -0400 Subject: [PATCH] [readdir] convert bfs ... and get rid of that ridiculous mutex in bfs_readdir() Signed-off-by: Al Viro --- fs/bfs/dir.c | 35 ++++++++++++++--------------------- 1 file changed, 14 insertions(+), 21 deletions(-) diff --git a/fs/bfs/dir.c b/fs/bfs/dir.c index 3f422f6bb5ca..a399e6d9dc74 100644 --- a/fs/bfs/dir.c +++ b/fs/bfs/dir.c @@ -26,58 +26,51 @@ static struct buffer_head *bfs_find_entry(struct inode *dir, const unsigned char *name, int namelen, struct bfs_dirent **res_dir); -static int bfs_readdir(struct file *f, void *dirent, filldir_t filldir) +static int bfs_readdir(struct file *f, struct dir_context *ctx) { struct inode *dir = file_inode(f); struct buffer_head *bh; struct bfs_dirent *de; - struct bfs_sb_info *info = BFS_SB(dir->i_sb); unsigned int offset; int block; - mutex_lock(&info->bfs_lock); - - if (f->f_pos & (BFS_DIRENT_SIZE - 1)) { + if (ctx->pos & (BFS_DIRENT_SIZE - 1)) { printf("Bad f_pos=%08lx for %s:%08lx\n", - (unsigned long)f->f_pos, + (unsigned long)ctx->pos, dir->i_sb->s_id, dir->i_ino); - mutex_unlock(&info->bfs_lock); - return -EBADF; + return -EINVAL; } - while (f->f_pos < dir->i_size) { - offset = f->f_pos & (BFS_BSIZE - 1); - block = BFS_I(dir)->i_sblock + (f->f_pos >> BFS_BSIZE_BITS); + while (ctx->pos < dir->i_size) { + offset = ctx->pos & (BFS_BSIZE - 1); + block = BFS_I(dir)->i_sblock + (ctx->pos >> BFS_BSIZE_BITS); bh = sb_bread(dir->i_sb, block); if (!bh) { - f->f_pos += BFS_BSIZE - offset; + ctx->pos += BFS_BSIZE - offset; continue; } do { de = (struct bfs_dirent *)(bh->b_data + offset); if (de->ino) { int size = strnlen(de->name, BFS_NAMELEN); - if (filldir(dirent, de->name, size, f->f_pos, + if (!dir_emit(ctx, de->name, size, le16_to_cpu(de->ino), - DT_UNKNOWN) < 0) { + DT_UNKNOWN)) { brelse(bh); - mutex_unlock(&info->bfs_lock); return 0; } } offset += BFS_DIRENT_SIZE; - f->f_pos += BFS_DIRENT_SIZE; - } while ((offset < BFS_BSIZE) && (f->f_pos < dir->i_size)); + ctx->pos += BFS_DIRENT_SIZE; + } while ((offset < BFS_BSIZE) && (ctx->pos < dir->i_size)); brelse(bh); } - - mutex_unlock(&info->bfs_lock); - return 0; + return 0; } const struct file_operations bfs_dir_operations = { .read = generic_read_dir, - .readdir = bfs_readdir, + .iterate = bfs_readdir, .fsync = generic_file_fsync, .llseek = generic_file_llseek, }; -- 2.34.1