lustre_fsfilt.h

非常经典的一个分布式系统

                        LBUG();
                }
        }
        fsfilt_check_slow(obd, now, obd_timeout, "journal start");

        return handle;
}

static inline void *fsfilt_brw_start(struct obd_device *obd, int objcount,
                                     struct fsfilt_objinfo *fso, int niocount,
                                     struct niobuf_local *nb,
                                     struct obd_trans_info *oti)
{
        return fsfilt_brw_start_log(obd, objcount, fso, niocount, nb, oti, 0);
}

static inline int fsfilt_extend(struct obd_device *obd, struct inode *inode,
                                unsigned int nblocks, void *handle)
{
        unsigned long now = jiffies;
        int rc = obd->obd_fsops->fs_extend(inode, nblocks, handle);
        CDEBUG(D_INFO, "extending handle %p with %u blocks\n", handle, nblocks);

        fsfilt_check_slow(obd, now, obd_timeout, "journal extend");

        return rc;
}

static inline int fsfilt_commit(struct obd_device *obd, struct inode *inode,
                                void *handle, int force_sync)
{
        unsigned long now = jiffies;
        int rc = obd->obd_fsops->fs_commit(inode, handle, force_sync);
        CDEBUG(D_INFO, "committing handle %p\n", handle);

        fsfilt_check_slow(obd, now, obd_timeout, "journal start");

        return rc;
}

static inline int fsfilt_commit_async(struct obd_device *obd,
                                      struct inode *inode, void *handle,
                                      void **wait_handle)
{
        unsigned long now = jiffies;
        int rc = obd->obd_fsops->fs_commit_async(inode, handle, wait_handle);

        CDEBUG(D_INFO, "committing handle %p (async)\n", *wait_handle);
        fsfilt_check_slow(obd, now, obd_timeout, "journal start");

        return rc;
}

static inline int fsfilt_commit_wait(struct obd_device *obd,
                                     struct inode *inode, void *handle)
{
        unsigned long now = jiffies;
        int rc = obd->obd_fsops->fs_commit_wait(inode, handle);
        CDEBUG(D_INFO, "waiting for completion %p\n", handle);
        fsfilt_check_slow(obd, now, obd_timeout, "journal start");
        return rc;
}

static inline int fsfilt_setattr(struct obd_device *obd, struct dentry *dentry,
                                 void *handle, struct iattr *iattr,int do_trunc)
{
        unsigned long now = jiffies;
        int rc;
        rc = obd->obd_fsops->fs_setattr(dentry, handle, iattr, do_trunc);
        fsfilt_check_slow(obd, now, obd_timeout, "setattr");
        return rc;
}

static inline int fsfilt_iocontrol(struct obd_device *obd, struct inode *inode,
                                   struct file *file, unsigned int cmd,
                                   unsigned long arg)
{
        return obd->obd_fsops->fs_iocontrol(inode, file, cmd, arg);
}

static inline int fsfilt_set_md(struct obd_device *obd, struct inode *inode,
                                void *handle, void *md, int size,
                                const char *name)
{
        return obd->obd_fsops->fs_set_md(inode, handle, md, size, name);
}

static inline int fsfilt_get_md(struct obd_device *obd, struct inode *inode,
                                void *md, int size, const char *name)
{
        return obd->obd_fsops->fs_get_md(inode, md, size, name);
}

static inline int fsfilt_send_bio(int rw, struct obd_device *obd,
                                  struct inode *inode, void *bio)
{
        LASSERTF(rw == OBD_BRW_WRITE || rw == OBD_BRW_READ, "%x\n", rw);

        if (rw == OBD_BRW_READ)
                return obd->obd_fsops->fs_send_bio(READ, inode, bio);
        return obd->obd_fsops->fs_send_bio(WRITE, inode, bio);
}

static inline ssize_t fsfilt_readpage(struct obd_device *obd,
                                      struct file *file, char *buf,
                                      size_t count, loff_t *offset)
{
        return obd->obd_fsops->fs_readpage(file, buf, count, offset);
}

static inline int fsfilt_add_journal_cb(struct obd_device *obd, __u64 last_rcvd,
                                        void *handle, fsfilt_cb_t cb_func,
                                        void *cb_data)
{
        return obd->obd_fsops->fs_add_journal_cb(obd, last_rcvd,
                                                 handle, cb_func, cb_data);
}

/* very similar to obd_statfs(), but caller already holds obd_osfs_lock */
static inline int fsfilt_statfs(struct obd_device *obd, struct super_block *sb,
                                __u64 max_age)
{
        int rc = 0;

        CDEBUG(D_SUPER, "osfs "LPU64", max_age "LPU64"\n",
                obd->obd_osfs_age, max_age);
        if (cfs_time_before_64(obd->obd_osfs_age, max_age)) {
                rc = obd->obd_fsops->fs_statfs(sb, &obd->obd_osfs);
                if (rc == 0) /* N.B. statfs can't really fail */
                        obd->obd_osfs_age = cfs_time_current_64();
        } else {
                CDEBUG(D_SUPER, "using cached obd_statfs data\n");
        }

        return rc;
}

static inline int fsfilt_sync(struct obd_device *obd, struct super_block *sb)
{
        return obd->obd_fsops->fs_sync(sb);
}

static inline int fsfilt_quotacheck(struct obd_device *obd,
                                    struct super_block *sb,
                                    struct obd_quotactl *oqctl)
{
        if (obd->obd_fsops->fs_quotacheck)
                return obd->obd_fsops->fs_quotacheck(sb, oqctl);
        return -ENOTSUPP;
}

static inline int fsfilt_quotactl(struct obd_device *obd,
                                  struct super_block *sb,
                                  struct obd_quotactl *oqctl)
{
        if (obd->obd_fsops->fs_quotactl)
                return obd->obd_fsops->fs_quotactl(sb, oqctl);
        return -ENOTSUPP;
}

static inline int fsfilt_quotainfo(struct obd_device *obd,
                                   struct lustre_quota_info *lqi,
                                   int type, int cmd)
{
        if (obd->obd_fsops->fs_quotainfo)
                return obd->obd_fsops->fs_quotainfo(lqi, type, cmd);
        return -ENOTSUPP;
}

static inline int fsfilt_qids(struct obd_device *obd, struct file *file,
                              struct inode *inode, int type, 
                              struct list_head *list)
{
        if (obd->obd_fsops->fs_qids)
                return obd->obd_fsops->fs_qids(file, inode, type, list);
        return -ENOTSUPP;
}

static inline int fsfilt_dquot(struct obd_device *obd,
                               struct lustre_dquot *dquot, int cmd)
{
        if (obd->obd_fsops->fs_dquot)
                return obd->obd_fsops->fs_dquot(dquot, cmd);
        return -ENOTSUPP;
}

static inline int fsfilt_map_inode_pages(struct obd_device *obd,
                                         struct inode *inode,
                                         struct page **page, int pages,
                                         unsigned long *blocks, int *created,
                                         int create, struct semaphore *sem)
{
        return obd->obd_fsops->fs_map_inode_pages(inode, page, pages, blocks,
                                                  created, create, sem);
}

static inline int fsfilt_read_record(struct obd_device *obd, struct file *file,
                                     void *buf, loff_t size, loff_t *offs)
{
        return obd->obd_fsops->fs_read_record(file, buf, size, offs);
}

static inline int fsfilt_write_record(struct obd_device *obd, struct file *file,
                                      void *buf, loff_t size, loff_t *offs,
                                      int force_sync)
{
        return obd->obd_fsops->fs_write_record(file, buf, size,offs,force_sync);
}

static inline int fsfilt_setup(struct obd_device *obd, struct super_block *fs)
{
        if (obd->obd_fsops->fs_setup)
                return obd->obd_fsops->fs_setup(fs);
        return 0;
}

static inline __u64 fsfilt_set_version(struct obd_device *obd,
                                      struct inode *inode, __u64 new_version)
{
        if (obd->obd_fsops->fs_set_version)
                return obd->obd_fsops->fs_set_version(inode, new_version);
        return -EOPNOTSUPP;
}

static inline __u64 fsfilt_get_version(struct obd_device *obd,
                                       struct inode *inode)
{
        if (obd->obd_fsops->fs_set_version)
                return obd->obd_fsops->fs_get_version(inode);
        return -EOPNOTSUPP;
}

#endif /* __KERNEL__ */

#endif