#ifndef _LUSTRE_LOG_H
#define _LUSTRE_LOG_H
+#include <linux/obd.h>
#include <linux/lustre_idl.h>
-struct obd_trans_info;
-struct obd_device;
-struct lov_stripe_md;
+#define LOG_NAME_LIMIT(logname, name) \
+ snprintf(logname, sizeof(logname), "LOGS/%s", name)
+
+struct plain_handle_data {
+ struct list_head phd_entry;
+ struct llog_handle *phd_cat_handle;
+ struct llog_cookie phd_cookie; /* cookie of this log in its cat */
+ int phd_last_idx;
+};
+
+struct cat_handle_data {
+ struct list_head chd_head;
+ struct llog_handle *chd_current_log; /* currently open log */
+};
/* In-memory descriptor for a log object or log catalog */
struct llog_handle {
- struct list_head lgh_list;
- struct llog_cookie lgh_cookie;
- struct semaphore lgh_lock;
- struct obd_device *lgh_obd;
- void *lgh_hdr;
+ struct rw_semaphore lgh_lock;
+ struct llog_logid lgh_id; /* id of this log */
+ struct llog_log_hdr *lgh_hdr;
struct file *lgh_file;
- struct obd_uuid *lgh_tgtuuid;
- struct llog_handle *lgh_current;
- struct llog_handle *(*lgh_log_create)(struct obd_device *obd);
- struct llog_handle *(*lgh_log_open)(struct obd_device *obd,
- struct llog_cookie *logcookie);
- int (*lgh_log_close)(struct llog_handle *cathandle,
- struct llog_handle *loghandle);
- int lgh_index;
+ int lgh_last_idx;
+ struct llog_ctxt *lgh_ctxt;
+ union {
+ struct plain_handle_data phd;
+ struct cat_handle_data chd;
+ } u;
};
-extern int llog_add_record(struct llog_handle *cathandle,
- struct llog_trans_hdr *rec,
- struct llog_cookie *logcookies);
-
-extern int llog_cancel_records(struct llog_handle *cathandle, int count,
- struct llog_cookie *cookies);
+#define LLOG_EEMPTY 4711
+/* llog.c - general API */
+typedef int (*llog_cb_t)(struct llog_handle *, struct llog_rec_hdr *, void *);
+int llog_init_handle(struct llog_handle *handle, int flags,
+ struct obd_uuid *uuid);
+int llog_process(struct llog_handle *loghandle, llog_cb_t cb, void *data);
extern struct llog_handle *llog_alloc_handle(void);
extern void llog_free_handle(struct llog_handle *handle);
-extern int llog_init_catalog(struct llog_handle *cathandle,
- struct obd_uuid *tgtuuid);
-extern int llog_delete_log(struct llog_handle *cathandle,
- struct llog_handle *loghandle);
-extern int llog_close_log(struct llog_handle *cathandle,
- struct llog_handle *loghandle);
-extern struct llog_handle *llog_new_log(struct llog_handle *cathandle,
- struct obd_uuid *tgtuuid);
+extern int llog_close(struct llog_handle *cathandle);
+extern int llog_cancel_rec(struct llog_handle *loghandle, int index);
+
+/* llog_cat.c - catalog api */
+struct llog_process_data {
+ void *lpd_data;
+ llog_cb_t lpd_cb;
+};
+int llog_cat_put(struct llog_handle *cathandle);
+int llog_cat_add_rec(struct llog_handle *cathandle, struct llog_rec_hdr *rec,
+ struct llog_cookie *reccookie, void *buf);
+int llog_cat_cancel_records(struct llog_handle *cathandle, int count,
+ struct llog_cookie *cookies);
+int llog_cat_process(struct llog_handle *cat_llh, llog_cb_t cb, void *data);
+
+/* llog_obd.c */
+int llog_setup(struct obd_device *obd, int index, struct obd_device *disk_obd,
+ int count, struct llog_logid *logid, struct llog_operations *op);
+int llog_cleanup(struct llog_ctxt *);
+int llog_sync(struct llog_ctxt *ctxt, struct obd_export *exp);
+int llog_add(struct llog_ctxt *ctxt,
+ struct llog_rec_hdr *rec, struct lov_stripe_md *lsm,
+ struct llog_cookie *logcookies, int numcookies);
+int llog_cancel(struct llog_ctxt *, struct lov_stripe_md *lsm,
+ int count, struct llog_cookie *cookies, int flags);
+
+int llog_obd_origin_setup(struct obd_device *obd, int index,
+ struct obd_device *disk_obd, int count,
+ struct llog_logid *logid);
+int llog_obd_origin_cleanup(struct llog_ctxt *ctxt);
+int llog_obd_origin_add(struct llog_ctxt *ctxt,
+ struct llog_rec_hdr *rec, struct lov_stripe_md *lsm,
+ struct llog_cookie *logcookies, int numcookies);
+
+int llog_cat_initialize(struct obd_device *obd, int count);
+int obd_llog_init(struct obd_device *obd, struct obd_device *disk_obd,
+ int count, struct llog_logid *logid);
+
+int obd_llog_finish(struct obd_device *obd, int count);
+
+/* llog_ioctl.c */
+int llog_ioctl(struct llog_ctxt *ctxt, int cmd, struct obd_ioctl_data *data);
+int llog_catlog_list(struct obd_device *obd, int count,
+ struct obd_ioctl_data *data);
+
+/* llog_net.c */
+int llog_initiator_connect(struct llog_ctxt *ctxt);
+int llog_receptor_accept(struct llog_ctxt *ctxt, struct obd_import *imp);
+int llog_origin_connect(struct llog_ctxt *ctxt, int count,
+ struct llog_logid *logid, struct llog_ctxt_gen *gen);
+int llog_handle_connect(struct ptlrpc_request *req);
+
+/* recov_thread.c */
+int llog_obd_repl_cancel(struct llog_ctxt *ctxt,
+ struct lov_stripe_md *lsm, int count,
+ struct llog_cookie *cookies, int flags);
+int llog_obd_repl_sync(struct llog_ctxt *ctxt, struct obd_export *exp);
+int llog_repl_connect(struct llog_ctxt *ctxt, int count,
+ struct llog_logid *logid, struct llog_ctxt_gen *gen);
+
+struct llog_operations {
+ int (*lop_write_rec)(struct llog_handle *loghandle,
+ struct llog_rec_hdr *rec,
+ struct llog_cookie *logcookies,
+ int numcookies,
+ void *,
+ int idx);
+ int (*lop_destroy)(struct llog_handle *handle);
+ int (*lop_next_block)(struct llog_handle *h,
+ int *curr_idx,
+ int next_idx,
+ __u64 *offset,
+ void *buf,
+ int len);
+ int (*lop_create)(struct llog_ctxt *ctxt, struct llog_handle **,
+ struct llog_logid *logid, char *name);
+ int (*lop_close)(struct llog_handle *handle);
+ int (*lop_read_header)(struct llog_handle *handle);
+
+ int (*lop_setup)(struct obd_device *obd, int ctxt_idx,
+ struct obd_device *disk_obd, int count,
+ struct llog_logid *logid);
+ int (*lop_sync)(struct llog_ctxt *ctxt, struct obd_export *exp);
+ int (*lop_cleanup)(struct llog_ctxt *ctxt);
+ int (*lop_add)(struct llog_ctxt *ctxt, struct llog_rec_hdr *rec,
+ struct lov_stripe_md *lsm,
+ struct llog_cookie *logcookies, int numcookies);
+ int (*lop_cancel)(struct llog_ctxt *ctxt, struct lov_stripe_md *lsm,
+ int count, struct llog_cookie *cookies, int flags);
+ int (*lop_connect)(struct llog_ctxt *ctxt, int count,
+ struct llog_logid *logid, struct llog_ctxt_gen *gen);
+ /* XXX add 2 more: commit callbacks and llog recovery functions */
+};
+
+extern struct llog_operations llog_lvfs_ops;
+
+
+struct llog_ctxt {
+ int loc_idx; /* my index the obd array of ctxt's */
+ struct llog_ctxt_gen loc_gen;
+ struct obd_device *loc_obd; /* points back to the containing obd*/
+ struct obd_export *loc_exp;
+ struct obd_import *loc_imp; /* to use in RPC's: can be backward
+ pointing import */
+ struct llog_operations *loc_logops;
+ struct llog_handle *loc_handle;
+ struct llog_canceld_ctxt *loc_llcd;
+ struct semaphore loc_sem; /* protects loc_llcd */
+ void *llog_proc_cb;
+};
+
+static inline void log_gen_init(struct llog_ctxt *ctxt)
+{
+ struct obd_device *obd = ctxt->loc_exp->exp_obd;
+
+ if (!strcmp(obd->obd_type->typ_name, "mds"))
+ ctxt->loc_gen.mnt_cnt = obd->u.mds.mds_mount_count;
+ else if (!strstr(obd->obd_type->typ_name, "filter")) {
+ ctxt->loc_gen.mnt_cnt = obd->u.filter.fo_mount_count;
+ }
+ else
+ ctxt->loc_gen.mnt_cnt = 0;
+}
+
+static inline int log_gen_lt(struct llog_ctxt_gen a, struct llog_ctxt_gen b)
+{
+ if (a.mnt_cnt < b.mnt_cnt)
+ return 1;
+ if (a.mnt_cnt > b.mnt_cnt)
+ return 0;
+ return(a.conn_cnt < b.conn_cnt ? 1 : 0);
+}
-#endif
+static inline int llog_obd2ops(struct llog_ctxt *ctxt,
+ struct llog_operations **lop)
+{
+ if (ctxt == NULL)
+ return -ENOTCONN;
+ *lop = ctxt->loc_logops;
+ if (*lop == NULL)
+ return -EOPNOTSUPP;
+ return 0;
+}
+
+static inline int llog_handle2ops(struct llog_handle *loghandle,
+ struct llog_operations **lop)
+{
+ if (loghandle == NULL)
+ return -EINVAL;
+ return llog_obd2ops(loghandle->lgh_ctxt, lop);
+}
+
+static inline int llog_data_len(int len)
+{
+ int mask = LLOG_MIN_REC_SIZE - 1;
+ int remains = LLOG_MIN_REC_SIZE - sizeof(struct llog_rec_hdr) -
+ sizeof(struct llog_rec_tail);
+
+ return (len <= remains) ?
+ remains : (((len + mask) & (~mask)) + remains);
+}
+
+static inline struct llog_ctxt *llog_get_context(struct obd_device *obd,
+ int index)
+{
+ if (index < 0 || index >= LLOG_MAX_CTXTS)
+ return NULL;
+ else
+ return obd->obd_llog_ctxt[index];
+}
+
+static inline int llog_write_rec(struct llog_handle *handle,
+ struct llog_rec_hdr *rec,
+ struct llog_cookie *logcookies,
+ int numcookies, void *buf, int idx)
+{
+ struct llog_operations *lop;
+ int rc, buflen;
+ ENTRY;
+
+ rc = llog_handle2ops(handle, &lop);
+ if (rc)
+ RETURN(rc);
+ if (lop->lop_write_rec == NULL)
+ RETURN(-EOPNOTSUPP);
+
+ if (buf)
+ buflen = le32_to_cpu(rec->lrh_len) + sizeof(struct llog_rec_hdr)
+ + sizeof(struct llog_rec_tail);
+ else
+ buflen = le32_to_cpu(rec->lrh_len);
+ LASSERT((buflen % LLOG_MIN_REC_SIZE) == 0);
+
+ rc = lop->lop_write_rec(handle, rec, logcookies, numcookies, buf, idx);
+ RETURN(rc);
+}
+
+static inline int llog_read_header(struct llog_handle *handle)
+{
+ struct llog_operations *lop;
+ int rc;
+ ENTRY;
+
+ rc = llog_handle2ops(handle, &lop);
+ if (rc)
+ RETURN(rc);
+ if (lop->lop_read_header == NULL)
+ RETURN(-EOPNOTSUPP);
+
+ rc = lop->lop_read_header(handle);
+ RETURN(rc);
+}
+
+static inline int llog_destroy(struct llog_handle *handle)
+{
+ struct llog_operations *lop;
+ int rc;
+ ENTRY;
+
+ rc = llog_handle2ops(handle, &lop);
+ if (rc)
+ RETURN(rc);
+ if (lop->lop_destroy == NULL)
+ RETURN(-EOPNOTSUPP);
+
+ rc = lop->lop_destroy(handle);
+ RETURN(rc);
+}
+
+#if 0
+static inline int llog_cancel(struct obd_export *exp,
+ struct lov_stripe_md *lsm, int count,
+ struct llog_cookie *cookies, int flags)
+{
+ struct llog_operations *lop;
+ int rc;
+ ENTRY;
+
+ rc = llog_handle2ops(loghandle, &lop);
+ if (rc)
+ RETURN(rc);
+ if (lop->lop_cancel == NULL)
+ RETURN(-EOPNOTSUPP);
+
+ rc = lop->lop_cancel(exp, lsm, count, cookies, flags);
+ RETURN(rc);
+}
+#endif
+
+static inline int llog_next_block(struct llog_handle *loghandle, int *cur_idx,
+ int next_idx, __u64 *cur_offset, void *buf,
+ int len)
+{
+ struct llog_operations *lop;
+ int rc;
+ ENTRY;
+
+ rc = llog_handle2ops(loghandle, &lop);
+ if (rc)
+ RETURN(rc);
+ if (lop->lop_next_block == NULL)
+ RETURN(-EOPNOTSUPP);
+
+ rc = lop->lop_next_block(loghandle, cur_idx, next_idx, cur_offset, buf,
+ len);
+ RETURN(rc);
+}
+
+static inline int llog_create(struct llog_ctxt *ctxt,
+ struct llog_handle **res,
+ struct llog_logid *logid, char *name)
+{
+ struct llog_operations *lop;
+ int rc;
+ ENTRY;
+
+ rc = llog_obd2ops(ctxt, &lop);
+ if (rc)
+ RETURN(rc);
+ if (lop->lop_create == NULL)
+ RETURN(-EOPNOTSUPP);
+
+ rc = lop->lop_create(ctxt, res, logid, name);
+ RETURN(rc);
+}
+
+static inline int llog_connect(struct llog_ctxt *ctxt, int count,
+ struct llog_logid *logid,
+ struct llog_ctxt_gen *gen)
+{
+ struct llog_operations *lop;
+ int rc;
+ ENTRY;
+
+ rc = llog_obd2ops(ctxt, &lop);
+ if (rc)
+ RETURN(rc);
+ if (lop->lop_connect == NULL)
+ RETURN(-EOPNOTSUPP);
+
+ rc = lop->lop_connect(ctxt, count, logid, gen);
+ RETURN(rc);
+}
+
+#endif
git://git.whamcloud.com / fs / lustre-release.git / blobdiff