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| author | Cyrill Gorcunov <gorcunov@openvz.org> | 2012-12-18 01:04:55 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-18 02:15:27 +0100 |
| commit | 55985dd72ab27b47530dcc8bdddd28b69f4abe8b (patch) | |
| tree | 9117b3f9bc9d46fe89ee3eccc959bab9b0e9db7b /fs/proc | |
| parent | tools/testing/selftests/kcmp/kcmp_test.c: print reason for failure in kcmp_test (diff) | |
| download | linux-55985dd72ab27b47530dcc8bdddd28b69f4abe8b.tar.xz linux-55985dd72ab27b47530dcc8bdddd28b69f4abe8b.zip | |
procfs: add ability to plug in auxiliary fdinfo providers
This patch brings ability to print out auxiliary data associated with
file in procfs interface /proc/pid/fdinfo/fd.
In particular further patches make eventfd, evenpoll, signalfd and
fsnotify to print additional information complete enough to restore
these objects after checkpoint.
To simplify the code we add show_fdinfo callback inside struct
file_operations (as Al and Pavel are proposing).
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Pavel Emelyanov <xemul@parallels.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andrey Vagin <avagin@openvz.org>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: James Bottomley <jbottomley@parallels.com>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Matthew Helsley <matt.helsley@gmail.com>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@onelan.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/proc')
| -rw-r--r-- | fs/proc/fd.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/proc/fd.c b/fs/proc/fd.c index f28a875f8779..d7a4a28ef630 100644 --- a/fs/proc/fd.c +++ b/fs/proc/fd.c @@ -50,6 +50,8 @@ static int seq_show(struct seq_file *m, void *v) if (!ret) { seq_printf(m, "pos:\t%lli\nflags:\t0%o\n", (long long)file->f_pos, f_flags); + if (file->f_op->show_fdinfo) + ret = file->f_op->show_fdinfo(m, file); fput(file); } |