diff --git a/fs/pipe.c b/fs/pipe.c index ba4376341ddd2f392fb38c3cc894e549e3b7f154..84e176906899502343f5b2fab3e1001a3b43775c 100644 --- a/fs/pipe.c +++ b/fs/pipe.c @@ -874,6 +874,8 @@ static const struct dentry_operations pipefs_dentry_operations = { .d_dname = pipefs_dname, }; +static const struct file_operations pipeanon_fops; + static struct inode * get_pipe_inode(void) { struct inode *inode = new_inode_pseudo(pipe_mnt->mnt_sb); @@ -891,7 +893,7 @@ static struct inode * get_pipe_inode(void) inode->i_pipe = pipe; pipe->files = 2; pipe->readers = pipe->writers = 1; - inode->i_fop = &pipefifo_fops; + inode->i_fop = &pipeanon_fops; /* * Mark the inode dirty from the very beginning, @@ -934,7 +936,7 @@ int create_pipe_files(struct file **res, int flags) f = alloc_file_pseudo(inode, pipe_mnt, "", O_WRONLY | (flags & (O_NONBLOCK | O_DIRECT)), - &pipefifo_fops); + &pipeanon_fops); if (IS_ERR(f)) { free_pipe_info(inode->i_pipe); iput(inode); @@ -944,7 +946,7 @@ int create_pipe_files(struct file **res, int flags) f->private_data = inode->i_pipe; res[0] = alloc_file_clone(f, O_RDONLY | (flags & O_NONBLOCK), - &pipefifo_fops); + &pipeanon_fops); if (IS_ERR(res[0])) { put_pipe_info(inode, inode->i_pipe); fput(f); @@ -1101,8 +1103,8 @@ static void wake_up_partner(struct pipe_inode_info *pipe) static int fifo_open(struct inode *inode, struct file *filp) { + bool is_pipe = inode->i_fop == &pipeanon_fops; struct pipe_inode_info *pipe; - bool is_pipe = inode->i_sb->s_magic == PIPEFS_MAGIC; int ret; filp->f_version = 0; @@ -1236,6 +1238,17 @@ const struct file_operations pipefifo_fops = { .splice_write = iter_file_splice_write, }; +static const struct file_operations pipeanon_fops = { + .open = fifo_open, + .read_iter = pipe_read, + .write_iter = pipe_write, + .poll = pipe_poll, + .unlocked_ioctl = pipe_ioctl, + .release = pipe_release, + .fasync = pipe_fasync, + .splice_write = iter_file_splice_write, +}; + /* * Currently we rely on the pipe array holding a power-of-2 number * of pages. Returns 0 on error. @@ -1383,7 +1396,9 @@ struct pipe_inode_info *get_pipe_info(struct file *file, bool for_splice) { struct pipe_inode_info *pipe = file->private_data; - if (file->f_op != &pipefifo_fops || !pipe) + if (!pipe) + return NULL; + if (file->f_op != &pipefifo_fops && file->f_op != &pipeanon_fops) return NULL; if (for_splice && pipe_has_watch_queue(pipe)) return NULL;