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Revert "FROMLIST: BACKPORT: procfs/dmabuf: Add inode number to /..."

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Revert submission 1578844

Reason for revert: Will be replaced by upstream version
Reverted Changes:
Ic9c551998:FROMLIST: BACKPORT: procfs/dmabuf: Add inode numbe...
I41407760c:FROMLIST: procfs: Allow reading fdinfo with PTRACE...

Bug: 159126739
Bug: 167141117
Signed-off-by: Kalesh Singh <kaleshsingh@google.com>
Change-Id: If02a6dc9a525193f286a138791de49085cd91972
This commit is contained in:
Kalesh Singh
2021-07-08 16:54:58 +00:00
parent 3ee5565017
commit 5ded961aa2
2 changed files with 8 additions and 34 deletions
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37
Documentation/filesystems/proc.rst
View File

@@ -1906,20 +1906,18 @@ if precise results are needed.
3.8 /proc/<pid>/fdinfo/<fd> - Information about opened file
---------------------------------------------------------------
This file provides information associated with an opened file. The regular
files have at least four fields -- 'pos', 'flags', 'mnt_id' and 'ino'.
The 'pos' represents the current offset of the opened file in decimal
form [see lseek(2) for details], 'flags' denotes the octal O_xxx mask the
file has been created with [see open(2) for details] and 'mnt_id' represents
mount ID of the file system containing the opened file [see 3.5
/proc/<pid>/mountinfo for details]. 'ino' represents the inode number of
the file.
files have at least three fields -- 'pos', 'flags' and 'mnt_id'. The 'pos'
represents the current offset of the opened file in decimal form [see lseek(2)
for details], 'flags' denotes the octal O_xxx mask the file has been
created with [see open(2) for details] and 'mnt_id' represents mount ID of
the file system containing the opened file [see 3.5 /proc/<pid>/mountinfo
for details].
A typical output is::
pos: 0
flags: 0100002
mnt_id: 19
ino: 63107
All locks associated with a file descriptor are shown in its fdinfo too::
@@ -1936,7 +1934,6 @@ Eventfd files
pos: 0
flags: 04002
mnt_id: 9
ino: 63107
eventfd-count: 5a
where 'eventfd-count' is hex value of a counter.
@@ -1949,7 +1946,6 @@ Signalfd files
pos: 0
flags: 04002
mnt_id: 9
ino: 63107
sigmask: 0000000000000200
where 'sigmask' is hex value of the signal mask associated
@@ -1963,7 +1959,6 @@ Epoll files
pos: 0
flags: 02
mnt_id: 9
ino: 63107
tfd: 5 events: 1d data: ffffffffffffffff pos:0 ino:61af sdev:7
where 'tfd' is a target file descriptor number in decimal form,
@@ -1980,8 +1975,6 @@ For inotify files the format is the following::
pos: 0
flags: 02000000
mnt_id: 9
ino: 63107
inotify wd:3 ino:9e7e sdev:800013 mask:800afce ignored_mask:0 fhandle-bytes:8 fhandle-type:1 f_handle:7e9e0000640d1b6d
where 'wd' is a watch descriptor in decimal form, i.e. a target file
@@ -2004,7 +1997,6 @@ For fanotify files the format is::
pos: 0
flags: 02
mnt_id: 9
ino: 63107
fanotify flags:10 event-flags:0
fanotify mnt_id:12 mflags:40 mask:38 ignored_mask:40000003
fanotify ino:4f969 sdev:800013 mflags:0 mask:3b ignored_mask:40000000 fhandle-bytes:8 fhandle-type:1 f_handle:69f90400c275b5b4
@@ -2029,7 +2021,6 @@ Timerfd files
pos: 0
flags: 02
mnt_id: 9
ino: 63107
clockid: 0
ticks: 0
settime flags: 01
@@ -2044,22 +2035,6 @@ details]. 'it_value' is remaining time until the timer expiration.
with TIMER_ABSTIME option which will be shown in 'settime flags', but 'it_value'
still exhibits timer's remaining time.
DMA Buffer files
~~~~~~~~~~~~~~~~
::
pos: 0
flags: 04002
mnt_id: 9
ino: 63107
size: 32768
count: 2
exp_name: system-heap
where 'size' is the size of the DMA buffer in bytes. 'count' is the file count of
the DMA buffer file. 'exp_name' is the name of the DMA buffer exporter.
3.9 /proc/<pid>/map_files - Information about memory mapped files
---------------------------------------------------------------------
This directory contains symbolic links which represent memory mapped files

5
fs/proc/fd.c
View File

@@ -54,10 +54,9 @@ static int seq_show(struct seq_file *m, void *v)
if (ret)
return ret;
seq_printf(m, "pos:\t%lli\nflags:\t0%o\nmnt_id:\t%i\nino:\t%lu\n",
seq_printf(m, "pos:\t%lli\nflags:\t0%o\nmnt_id:\t%i\n",
(long long)file->f_pos, f_flags,
real_mount(file->f_path.mnt)->mnt_id,
file_inode(file)->i_ino);
real_mount(file->f_path.mnt)->mnt_id);
show_fd_locks(m, file, files);
if (seq_has_overflowed(m))