From 6192269444ebfbfb42e23c7a6a93c76ffe4b5e51 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Wed, 20 Apr 2016 23:08:32 -0400 Subject: introduce a parallel variant of ->iterate() New method: ->iterate_shared(). Same arguments as in ->iterate(), called with the directory locked only shared. Once all filesystems switch, the old one will be gone. Signed-off-by: Al Viro --- fs/coda/dir.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) (limited to 'fs/coda') diff --git a/fs/coda/dir.c b/fs/coda/dir.c index 42e731b8c80a..6fb8672c0892 100644 --- a/fs/coda/dir.c +++ b/fs/coda/dir.c @@ -424,16 +424,22 @@ static int coda_readdir(struct file *coda_file, struct dir_context *ctx) BUG_ON(!cfi || cfi->cfi_magic != CODA_MAGIC); host_file = cfi->cfi_container; - if (host_file->f_op->iterate) { + if (host_file->f_op->iterate || host_file->f_op->iterate_shared) { struct inode *host_inode = file_inode(host_file); - - inode_lock(host_inode); ret = -ENOENT; if (!IS_DEADDIR(host_inode)) { - ret = host_file->f_op->iterate(host_file, ctx); - file_accessed(host_file); + if (host_file->f_op->iterate_shared) { + inode_lock_shared(host_inode); + ret = host_file->f_op->iterate_shared(host_file, ctx); + file_accessed(host_file); + inode_unlock_shared(host_inode); + } else { + inode_lock(host_inode); + ret = host_file->f_op->iterate(host_file, ctx); + file_accessed(host_file); + inode_unlock(host_inode); + } } - inode_unlock(host_inode); return ret; } /* Venus: we must read Venus dirents from a file */ -- cgit v1.2.3