linux-imx

​

#include <linux/ceph/ceph_debug.h>

​

#include <linux/backing-dev.h>

#include <linux/ctype.h>

#include <linux/fs.h>

#include <linux/inet.h>

#include <linux/in6.h>

#include <linux/module.h>

#include <linux/mount.h>

#include <linux/parser.h>

#include <linux/sched.h>

#include <linux/seq_file.h>

#include <linux/slab.h>

#include <linux/statfs.h>

#include <linux/string.h>

​

#include "super.h"

#include "mds_client.h"

#include "cache.h"

​

#include <linux/ceph/ceph_features.h>

#include <linux/ceph/decode.h>

#include <linux/ceph/mon_client.h>

#include <linux/ceph/auth.h>

#include <linux/ceph/debugfs.h>

​

/*

 * Ceph superblock operations

 *

 * Handle the basics of mounting, unmounting.

 */

​

/*

 * super ops

 */

static void ceph_put_super(struct super_block *s)

{

    struct ceph_fs_client *fsc = ceph_sb_to_client(s);

​

    dout("put_super\n");

    ceph_mdsc_close_sessions(fsc->mdsc);

}

​

static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf)

{

    struct ceph_fs_client *fsc = ceph_inode_to_client(d_inode(dentry));

    struct ceph_mon_client *monc = &fsc->client->monc;

    struct ceph_statfs st;

    u64 fsid;

    int err;

    u64 data_pool;

​

    if (fsc->mdsc->mdsmap->m_num_data_pg_pools == 1) {

        data_pool = fsc->mdsc->mdsmap->m_data_pg_pools[0];

    } else {

        data_pool = CEPH_NOPOOL;

    }

​

    dout("statfs\n");

    err = ceph_monc_do_statfs(monc, data_pool, &st);

    if (err < 0)

        return err;

​

    /* fill in kstatfs */

    buf->f_type = CEPH_SUPER_MAGIC;  /* ?? */

​

    /*

     * express utilization in terms of large blocks to avoid

     * overflow on 32-bit machines.

     *

     * NOTE: for the time being, we make bsize == frsize to humor

     * not-yet-ancient versions of glibc that are broken.

     * Someday, we will probably want to report a real block

     * size...  whatever that may mean for a network file system!

     */

    buf->f_bsize = 1 << CEPH_BLOCK_SHIFT;

    buf->f_frsize = 1 << CEPH_BLOCK_SHIFT;

​

    /*

     * By default use root quota for stats; fallback to overall filesystem

     * usage if using 'noquotadf' mount option or if the root dir doesn't

     * have max_bytes quota set.

     */

    if (ceph_test_mount_opt(fsc, NOQUOTADF) ||

        !ceph_quota_update_statfs(fsc, buf)) {

        buf->f_blocks = le64_to_cpu(st.kb) >> (CEPH_BLOCK_SHIFT-10);

        buf->f_bfree = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10);

        buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10);

    }

​

    buf->f_files = le64_to_cpu(st.num_objects);