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    Subject[RFC 07/18] limits: track RLIMIT_FSIZE actual max
    Date
    Track maximum file size, presented in /proc/self/limits.

    Signed-off-by: Topi Miettinen <toiwoton@gmail.com>
    ---
    fs/attr.c | 2 ++
    mm/filemap.c | 1 +
    2 files changed, 3 insertions(+)

    diff --git a/fs/attr.c b/fs/attr.c
    index 25b24d0..1b620f7 100644
    --- a/fs/attr.c
    +++ b/fs/attr.c
    @@ -116,6 +116,8 @@ int inode_newsize_ok(const struct inode *inode, loff_t offset)
    return -ETXTBSY;
    }

    + bump_rlimit(RLIMIT_FSIZE, offset);
    +
    return 0;
    out_sig:
    send_sig(SIGXFSZ, current, 0);
    diff --git a/mm/filemap.c b/mm/filemap.c
    index 00ae878..1fa9864 100644
    --- a/mm/filemap.c
    +++ b/mm/filemap.c
    @@ -2447,6 +2447,7 @@ inline ssize_t generic_write_checks(struct kiocb *iocb, struct iov_iter *from)
    send_sig(SIGXFSZ, current, 0);
    return -EFBIG;
    }
    + bump_rlimit(RLIMIT_FSIZE, iocb->ki_pos);
    iov_iter_truncate(from, limit - (unsigned long)pos);
    }

    --
    2.8.1
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