STRUCT PIPE_INODE_IN(9)                     pipes API                     STRUCT PIPE_INODE_IN(9)



NAME
       struct_pipe_inode_info - a linux kernel pipe

SYNOPSIS
       struct pipe_inode_info {
         struct mutex mutex;
         wait_queue_head_t wait;
         unsigned int nrbufs;
         unsigned int curbuf;
         unsigned int buffers;
         unsigned int readers;
         unsigned int writers;
         unsigned int files;
         unsigned int waiting_writers;
         unsigned int r_counter;
         unsigned int w_counter;
         struct page * tmp_page;
         struct fasync_struct * fasync_readers;
         struct fasync_struct * fasync_writers;
         struct pipe_buffer * bufs;
         struct user_struct * user;
       };

MEMBERS
       mutex
           mutex protecting the whole thing

       wait
           reader/writer wait point in case of empty/full pipe

       nrbufs
           the number of non-empty pipe buffers in this pipe

       curbuf
           the current pipe buffer entry

       buffers
           total number of buffers (should be a power of 2)

       readers
           number of current readers of this pipe

       writers
           number of current writers of this pipe

       files
           number of struct file referring this pipe (protected by ->i_lock)

       waiting_writers
           number of writers blocked waiting for room

       r_counter
           reader counter

       w_counter
           writer counter

       tmp_page
           cached released page

       fasync_readers
           reader side fasync

       fasync_writers
           writer side fasync

       bufs
           the circular array of pipe buffers

       user
           the user who created this pipe

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                   STRUCT PIPE_INODE_IN(9)