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    Subject[PATCH 2/4] proc: Show namespaces IDs in /proc/pid/ns/* files
    Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

    ---
    fs/proc/namespaces.c | 12 ++++++++++++
    include/linux/mm.h | 1 +
    2 files changed, 13 insertions(+), 0 deletions(-)

    diff --git a/fs/proc/namespaces.c b/fs/proc/namespaces.c
    index be177f7..48c64ab 100644
    --- a/fs/proc/namespaces.c
    +++ b/fs/proc/namespaces.c
    @@ -27,8 +27,20 @@ static const struct proc_ns_operations *ns_entries[] = {
    #endif
    };

    +static ssize_t proc_ns_read(struct file *file, char __user *buf,
    + size_t len, loff_t *ppos)
    +{
    + char tmp[32];
    + struct proc_inode *ei = PROC_I(file->f_dentry->d_inode);
    +
    + snprintf(tmp, sizeof(tmp), "id:\t%lu\n",
    + gen_object_id(ei->ns, GEN_OBJ_ID_NS));
    + return simple_read_from_buffer(buf, len, ppos, tmp, strlen(tmp));
    +}
    +
    static const struct file_operations ns_file_operations = {
    .llseek = no_llseek,
    + .read = proc_ns_read,
    };

    static struct dentry *proc_ns_instantiate(struct inode *dir,
    diff --git a/include/linux/mm.h b/include/linux/mm.h
    index 80ea327..cd4d727 100644
    --- a/include/linux/mm.h
    +++ b/include/linux/mm.h
    @@ -1628,6 +1628,7 @@ extern void copy_user_huge_page(struct page *dst, struct page *src,
    #endif /* CONFIG_TRANSPARENT_HUGEPAGE || CONFIG_HUGETLBFS */

    enum {
    + GEN_OBJ_ID_NS,
    GEN_OBJ_ID_TYPES,
    };

    --
    1.5.5.6

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