[RFC 09/18] limits: track RLIMIT_CORE actual max

[Topi Miettinen]

Track maximum size of core dump written, presented in /proc/self/limits.

Signed-off-by: Topi Miettinen <toiwo...@gmail.com>
---
 fs/coredump.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/fs/coredump.c b/fs/coredump.c
index 281b768..abedc99 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -784,20 +784,25 @@ int dump_emit(struct coredump_params *cprm, const void 
*addr, int nr)
        struct file *file = cprm->file;
        loff_t pos = file->f_pos;
        ssize_t n;
+       int r = 0;
+
        if (cprm->written + nr > cprm->limit)
                return 0;
        while (nr) {
                if (dump_interrupted())
-                       return 0;
+                       goto err;
                n = __kernel_write(file, addr, nr, &pos);
                if (n <= 0)
-                       return 0;
+                       goto err;
                file->f_pos = pos;
                cprm->written += n;
                cprm->pos += n;
                nr -= n;
        }
-       return 1;
+       r = 1;
+ err:
+       bump_rlimit(RLIMIT_CORE, cprm->written);
+       return r;
 }
 EXPORT_SYMBOL(dump_emit);
 
-- 
2.8.1