1STRUCT PIPE_INODE_IN(9)            pipes API           STRUCT PIPE_INODE_IN(9)
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NAME

6       struct_pipe_inode_info - a linux kernel pipe
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SYNOPSIS

9       struct pipe_inode_info {
10         struct mutex mutex;
11         wait_queue_head_t wait;
12         unsigned int nrbufs;
13         unsigned int curbuf;
14         unsigned int buffers;
15         unsigned int readers;
16         unsigned int writers;
17         unsigned int files;
18         unsigned int waiting_writers;
19         unsigned int r_counter;
20         unsigned int w_counter;
21         struct page * tmp_page;
22         struct fasync_struct * fasync_readers;
23         struct fasync_struct * fasync_writers;
24         struct pipe_buffer * bufs;
25       };
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MEMBERS

28       mutex
29           mutex protecting the whole thing
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31       wait
32           reader/writer wait point in case of empty/full pipe
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34       nrbufs
35           the number of non-empty pipe buffers in this pipe
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37       curbuf
38           the current pipe buffer entry
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40       buffers
41           total number of buffers (should be a power of 2)
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43       readers
44           number of current readers of this pipe
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46       writers
47           number of current writers of this pipe
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49       files
50           number of struct file refering this pipe (protected by ->i_lock)
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52       waiting_writers
53           number of writers blocked waiting for room
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55       r_counter
56           reader counter
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58       w_counter
59           writer counter
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61       tmp_page
62           cached released page
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64       fasync_readers
65           reader side fasync
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67       fasync_writers
68           writer side fasync
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70       bufs
71           the circular array of pipe buffers
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74Kernel Hackers Manual 3.10         June 2019           STRUCT PIPE_INODE_IN(9)
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