struct dt_object *ofd_lastid_obj[OFD_MAX_GROUPS];
cfs_spinlock_t ofd_objid_lock;
+ /* protect all statfs-related counters */
+ cfs_spinlock_t ofd_osfs_lock;
+ /* statfs optimization: we cache a bit */
+ struct obd_statfs ofd_osfs;
+ __u64 ofd_osfs_age;
+ int ofd_blockbits;
+ /* writes which might be be accounted twice in ofd_osfs.os_bavail */
+ obd_size ofd_osfs_unstable;
+
+ /* counters used during statfs update, protected by ofd_osfs_lock.
+ * record when some statfs refresh are in progress */
+ int ofd_statfs_inflight;
+ /* track writes completed while statfs refresh is underway.
+ * tracking is only effective when ofd_statfs_inflight > 1 */
+ obd_size ofd_osfs_inflight;
+
+ /* grants: all values in bytes */
+ /* grant lock to protect all grant counters */
+ cfs_spinlock_t ofd_grant_lock;
+ /* total amount of dirty data reported by clients in incoming obdo */
+ obd_size ofd_tot_dirty;
+ /* sum of filesystem space granted to clients for async writes */
+ obd_size ofd_tot_granted;
+ /* grant used by I/Os in progress (between prepare and commit) */
+ obd_size ofd_tot_pending;
+ /* free space threshold over which we stop granting space to clients
+ * ofd_grant_ratio is stored as a fixed-point fraction using
+ * OFD_GRANT_RATIO_SHIFT of the remaining free space, not in percentage
+ * values */
+ int ofd_grant_ratio;
+ /* number of clients using grants */
+ int ofd_tot_granted_clients;
+
/* ofd mod data: ofd_device wide values */
int ofd_fmd_max_num; /* per ofd ofd_mod_data */
cfs_duration_t ofd_fmd_max_age; /* time to fmd expiry */
/* sync journal on writes */
ofd_syncjournal:1,
/* sync on lock cancel */
- ofd_sync_lock_cancel:2;
+ ofd_sync_lock_cancel:2,
+ /* shall we grant space to clients not
+ * supporting OBD_CONNECT_GRANT_PARAM? */
+ ofd_grant_compat_disable:1;
struct lu_site ofd_site;
};
struct dt_object_format fti_dof;
struct lu_buf fti_buf;
loff_t fti_off;
+
+ /* Space used by the I/O, used by grant code */
+ unsigned long fti_used;
};
extern void target_recovery_fini(struct obd_device *obd);
/* ofd_obd.c */
extern struct obd_ops ofd_obd_ops;
+int ofd_statfs_internal(const struct lu_env *env, struct ofd_device *ofd,
+ struct obd_statfs *osfs, __u64 max_age,
+ int *from_cache);
/* ofd_fs.c */
obd_id ofd_last_id(struct ofd_device *ofd, obd_seq seq);
int lproc_ofd_attach_seqstat(struct obd_device *dev);
extern struct file_operations ofd_per_nid_stats_fops;
+/* ofd_grants.c */
+#define OFD_GRANT_RATIO_SHIFT 8
+static inline __u64 ofd_grant_reserved(struct ofd_device *ofd, obd_size bavail)
+{
+ return (bavail * ofd->ofd_grant_ratio) >> OFD_GRANT_RATIO_SHIFT;
+}
+
+static inline int ofd_grant_ratio_conv(int percentage)
+{
+ return (percentage << OFD_GRANT_RATIO_SHIFT) / 100;
+}
+
+static inline int ofd_grant_param_supp(struct obd_export *exp)
+{
+ return !!(exp->exp_connect_flags & OBD_CONNECT_GRANT_PARAM);
+}
+
+/* Blocksize used for client not supporting OBD_CONNECT_GRANT_PARAM.
+ * That's 4KB=2^12 which is the biggest block size known to work whatever
+ * the client's page size is. */
+#define COMPAT_BSIZE_SHIFT 12
+static inline int ofd_grant_compat(struct obd_export *exp,
+ struct ofd_device *ofd)
+{
+ /* Clients which don't support OBD_CONNECT_GRANT_PARAM cannot handle
+ * a block size > page size and consume CFS_PAGE_SIZE of grant when
+ * dirtying a page regardless of the block size */
+ return !!(ofd_obd(ofd)->obd_self_export != exp &&
+ ofd->ofd_blockbits > COMPAT_BSIZE_SHIFT &&
+ !ofd_grant_param_supp(exp));
+}
+
+static inline int ofd_grant_prohibit(struct obd_export *exp,
+ struct ofd_device *ofd)
+{
+ /* When ofd_grant_compat_disable is set, we don't grant any space to
+ * clients not supporting OBD_CONNECT_GRANT_PARAM.
+ * Otherwise, space granted to such a client is inflated since it
+ * consumes CFS_PAGE_SIZE of grant space per block */
+ return !!(ofd_grant_compat(exp, ofd) && ofd->ofd_grant_compat_disable);
+}
+
+void ofd_grant_sanity_check(struct obd_device *obd, const char *func);
+long ofd_grant_connect(const struct lu_env *env, struct obd_export *exp,
+ obd_size want);
+void ofd_grant_discard(struct obd_export *exp);
+void ofd_grant_prepare_read(const struct lu_env *env, struct obd_export *exp,
+ struct obdo *oa);
+void ofd_grant_prepare_write(const struct lu_env *env, struct obd_export *exp,
+ struct obdo *oa, struct niobuf_remote *rnb,
+ int niocount);
+void ofd_grant_commit(const struct lu_env *env, struct obd_export *exp, int rc);
+int ofd_grant_create(const struct lu_env *env, struct obd_export *exp, int *nr);
+
/* ofd_fmd.c */
int ofd_fmd_init(void);
void ofd_fmd_exit(void);
ofd->ofd_sync_lock_cancel = ALWAYS_SYNC_ON_CANCEL;
}
+/* niobuf_local has no rnb_ prefix in master */
+#define rnb_offset offset
+#define rnb_flags flags
+#define rnb_len len
+
#endif /* _OFD_INTERNAL_H */
git://git.whamcloud.com / fs / lustre-release.git / blobdiff