-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
* GPL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2012, Whamcloud, Inc.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
#include <obd_class.h>
#include <obd_ost.h>
#include <lustre/lustre_idl.h>
+#include <dt_object.h>
#define LOG_NAME_LIMIT(logname, name) \
snprintf(logname, sizeof(logname), "LOGS/%s", name)
#define LLOG_EEMPTY 4711
+enum llog_open_param {
+ LLOG_OPEN_EXISTS = 0x0000,
+ LLOG_OPEN_NEW = 0x0001,
+};
+
struct plain_handle_data {
cfs_list_t 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 {
cfs_list_t chd_head;
struct llog_handle *chd_current_log; /* currently open log */
+ struct llog_handle *chd_next_log; /* llog to be used next */
};
-/* In-memory descriptor for a log object or log catalog */
-struct llog_handle {
- cfs_rw_semaphore_t lgh_lock;
- struct llog_logid lgh_id; /* id of this log */
- struct llog_log_hdr *lgh_hdr;
- struct file *lgh_file;
- int lgh_last_idx;
- int lgh_cur_idx; /* used during llog_process */
- __u64 lgh_cur_offset; /* used during llog_process */
- struct llog_ctxt *lgh_ctxt;
- union {
- struct plain_handle_data phd;
- struct cat_handle_data chd;
- } u;
-};
+static inline void logid_to_fid(struct llog_logid *id, struct lu_fid *fid)
+{
+ /* For compatibility purposes we identify pre-OSD (~< 2.3.51 MDS)
+ * logid's by non-zero ogen (inode generation) and convert them
+ * into IGIF */
+ if (id->lgl_ogen == 0) {
+ fid->f_seq = id->lgl_oseq;
+ fid->f_oid = id->lgl_oid;
+ fid->f_ver = 0;
+ } else {
+ lu_igif_build(fid, id->lgl_oid, id->lgl_ogen);
+ }
+}
+
+static inline void fid_to_logid(struct lu_fid *fid, struct llog_logid *id)
+{
+ id->lgl_oseq = fid->f_seq;
+ id->lgl_oid = fid->f_oid;
+ id->lgl_ogen = 0;
+}
+
+struct llog_handle;
/* llog.c - general API */
-typedef int (*llog_cb_t)(struct llog_handle *, struct llog_rec_hdr *, void *);
-typedef int (*llog_fill_rec_cb_t)(struct llog_rec_hdr *rec, void *data);
-extern struct llog_handle *llog_alloc_handle(void);
-int llog_init_handle(struct llog_handle *handle, int flags,
- struct obd_uuid *uuid);
-extern void llog_free_handle(struct llog_handle *handle);
-int llog_process(struct llog_handle *loghandle, llog_cb_t cb,
- void *data, void *catdata);
-int llog_process_flags(struct llog_handle *loghandle, llog_cb_t cb,
- void *data, void *catdata, int flags);
-int llog_reverse_process(struct llog_handle *loghandle, llog_cb_t cb,
- void *data, void *catdata);
-extern int llog_cancel_rec(struct llog_handle *loghandle, int index);
-extern int llog_close(struct llog_handle *cathandle);
-extern int llog_get_size(struct llog_handle *loghandle);
+typedef int (*llog_cb_t)(const struct lu_env *env, struct llog_handle *lgh,
+ struct llog_rec_hdr *rec, void *data);
+int llog_init_handle(const struct lu_env *env, struct llog_handle *handle,
+ int flags, struct obd_uuid *uuid);
+int llog_process(const struct lu_env *env, struct llog_handle *loghandle,
+ llog_cb_t cb, void *data, void *catdata);
+int llog_process_or_fork(const struct lu_env *env,
+ struct llog_handle *loghandle,
+ llog_cb_t cb, void *data, void *catdata, bool fork);
+int llog_reverse_process(const struct lu_env *env,
+ struct llog_handle *loghandle, llog_cb_t cb,
+ void *data, void *catdata);
+int llog_cancel_rec(const struct lu_env *env, struct llog_handle *loghandle,
+ int index);
+int llog_open(const struct lu_env *env, struct llog_ctxt *ctxt,
+ struct llog_handle **lgh, struct llog_logid *logid,
+ char *name, enum llog_open_param open_param);
+int llog_close(const struct lu_env *env, struct llog_handle *cathandle);
+int llog_get_size(struct llog_handle *loghandle);
/* llog_process flags */
#define LLOG_FLAG_NODEAMON 0x0001
*/
int lpd_startcat;
int lpd_startidx;
- int lpd_flags; /** llog_process flags */
};
struct llog_process_cat_data {
void *lpca_arg;
};
-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,
- int startcat, int startidx);
-int llog_cat_process_flags(struct llog_handle *cat_llh, llog_cb_t cb, void *data,
- int flags, int startcat, int startidx);
+int cat_cancel_cb(const struct lu_env *env, struct llog_handle *cathandle,
+ struct llog_rec_hdr *rec, void *data);
+int llog_cat_close(const struct lu_env *env, struct llog_handle *cathandle);
+int llog_cat_add_rec(const struct lu_env *env, struct llog_handle *cathandle,
+ struct llog_rec_hdr *rec, struct llog_cookie *reccookie,
+ void *buf);
+int llog_cat_cancel_records(const struct lu_env *env,
+ struct llog_handle *cathandle, int count,
+ struct llog_cookie *cookies);
+int __llog_cat_process(const struct lu_env *env, struct llog_handle *cat_llh,
+ llog_cb_t cb, void *data, int startcat, int startidx,
+ int fork);
+int llog_cat_process(const struct lu_env *env, struct llog_handle *cat_llh,
+ llog_cb_t cb, void *data, int startcat, int startidx);
int llog_cat_process_thread(void *data);
-int llog_cat_reverse_process(struct llog_handle *cat_llh, llog_cb_t cb, void *data);
+int llog_cat_reverse_process(const struct lu_env *env,
+ struct llog_handle *cat_llh, llog_cb_t cb,
+ void *data);
int llog_cat_set_first_idx(struct llog_handle *cathandle, int index);
/* llog_obd.c */
struct llog_operations *op);
int __llog_ctxt_put(struct llog_ctxt *ctxt);
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, struct obd_llog_group *olg,
- int index, struct obd_device *disk_obd, int count,
- struct llog_logid *logid, const char *name);
-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_sync(struct llog_ctxt *ctxt, struct obd_export *exp, int flags);
+int llog_add(const struct lu_env *env, struct llog_ctxt *ctxt,
+ struct llog_rec_hdr *rec, struct lov_stripe_md *lsm,
+ struct llog_cookie *logcookies, int numcookies);
+int llog_cancel(const struct lu_env *env, struct llog_ctxt *ctxt,
+ struct lov_stripe_md *lsm, int count,
+ struct llog_cookie *cookies, int flags);
+int llog_obd_origin_setup(const struct lu_env *env, struct obd_device *obd,
+ struct obd_llog_group *olg, int index,
+ struct obd_device *disk_obd, int count,
+ struct llog_logid *logid, const char *name);
+int llog_obd_origin_cleanup(const struct lu_env *env, struct llog_ctxt *ctxt);
+int llog_obd_origin_add(const struct lu_env *env, struct llog_ctxt *ctxt,
+ struct llog_rec_hdr *rec, struct lov_stripe_md *lsm,
+ struct llog_cookie *logcookies, int numcookies);
int obd_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
struct obd_device *disk_obd, int *idx);
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_obd_repl_cancel(const struct lu_env *env, 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 flags);
int llog_obd_repl_connect(struct llog_ctxt *ctxt,
struct llog_logid *logid, struct llog_gen *gen,
struct obd_uuid *uuid);
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_prev_block)(struct llog_handle *h,
- int prev_idx, 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, struct obd_llog_group *olg,
- int ctxt_idx, struct obd_device *disk_obd, int count,
- struct llog_logid *logid, const char *name);
- 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,
- struct llog_logid *logid, struct llog_gen *gen,
- struct obd_uuid *uuid);
- /* XXX add 2 more: commit callbacks and llog recovery functions */
+ int (*lop_destroy)(const struct lu_env *env,
+ struct llog_handle *handle);
+ int (*lop_next_block)(const struct lu_env *env, struct llog_handle *h,
+ int *curr_idx, int next_idx, __u64 *offset,
+ void *buf, int len);
+ int (*lop_prev_block)(const struct lu_env *env, struct llog_handle *h,
+ int prev_idx, void *buf, int len);
+ int (*lop_read_header)(const struct lu_env *env,
+ struct llog_handle *handle);
+ int (*lop_setup)(const struct lu_env *env, struct obd_device *obd,
+ struct obd_llog_group *olg, int ctxt_idx,
+ struct obd_device *disk_obd, int count,
+ struct llog_logid *logid, const char *name);
+ int (*lop_sync)(struct llog_ctxt *ctxt, struct obd_export *exp,
+ int flags);
+ int (*lop_cleanup)(const struct lu_env *env, struct llog_ctxt *ctxt);
+ int (*lop_cancel)(const struct lu_env *env, struct llog_ctxt *ctxt,
+ struct lov_stripe_md *lsm, int count,
+ struct llog_cookie *cookies, int flags);
+ int (*lop_connect)(struct llog_ctxt *ctxt, struct llog_logid *logid,
+ struct llog_gen *gen, struct obd_uuid *uuid);
+ /**
+ * Any llog file must be opened first using llog_open(). Llog can be
+ * opened by name, logid or without both, in last case the new logid
+ * will be generated.
+ */
+ int (*lop_open)(const struct lu_env *env, struct llog_handle *lgh,
+ struct llog_logid *logid, char *name,
+ enum llog_open_param);
+ /**
+ * Opened llog may not exist and this must be checked where needed using
+ * the llog_exist() call.
+ */
+ int (*lop_exist)(struct llog_handle *lgh);
+ /**
+ * Close llog file and calls llog_free_handle() implicitly.
+ * Any opened llog must be closed by llog_close() call.
+ */
+ int (*lop_close)(const struct lu_env *env, struct llog_handle *handle);
+ /**
+ * Create new llog file. The llog must be opened.
+ * Must be used only for local llog operations.
+ */
+ int (*lop_declare_create)(const struct lu_env *env,
+ struct llog_handle *handle,
+ struct thandle *th);
+ int (*lop_create)(const struct lu_env *env, struct llog_handle *handle,
+ struct thandle *th);
+ /**
+ * write new record in llog. It appends records usually but can edit
+ * existing records too.
+ */
+ int (*lop_write_rec)(const struct lu_env *env,
+ struct llog_handle *loghandle,
+ struct llog_rec_hdr *rec,
+ struct llog_cookie *logcookies, int numcookies,
+ void *buf, int idx);
+ /**
+ * Add new record in llog catalog. Does the same as llog_write_rec()
+ * but using llog catalog.
+ */
+ int (*lop_add)(const struct lu_env *env, struct llog_ctxt *ctxt,
+ struct llog_rec_hdr *rec, struct lov_stripe_md *lsm,
+ struct llog_cookie *logcookies, int numcookies);
+};
+
+/* In-memory descriptor for a log object or log catalog */
+struct llog_handle {
+ cfs_rw_semaphore_t lgh_lock;
+ cfs_spinlock_t lgh_hdr_lock; /* protect lgh_hdr data */
+ struct llog_logid lgh_id; /* id of this log */
+ struct llog_log_hdr *lgh_hdr;
+ struct file *lgh_file;
+ struct dt_object *lgh_obj;
+ int lgh_last_idx;
+ int lgh_cur_idx; /* used during llog_process */
+ __u64 lgh_cur_offset; /* used during llog_process */
+ struct llog_ctxt *lgh_ctxt;
+ union {
+ struct plain_handle_data phd;
+ struct cat_handle_data chd;
+ } u;
+ char *lgh_name;
+ void *private_data;
+ struct llog_operations *lgh_logops;
};
/* llog_lvfs.c */
char *name, int idx, int count, struct llog_catid *idarray);
#define LLOG_CTXT_FLAG_UNINITIALIZED 0x00000001
+#define LLOG_CTXT_FLAG_STOP 0x00000002
struct llog_ctxt {
int loc_idx; /* my index the obd array of ctxt's */
struct llog_handle *loc_handle;
struct llog_commit_master *loc_lcm;
struct llog_canceld_ctxt *loc_llcd;
- cfs_semaphore_t loc_sem; /* protects loc_llcd and loc_imp */
+ cfs_mutex_t loc_mutex; /* protects loc_llcd and loc_imp */
cfs_atomic_t loc_refcount;
void *llog_proc_cb;
long loc_flags; /* flags, see above defines */
+ struct dt_object *loc_dir;
};
#define LCM_NAME_SIZE 64
static inline struct llog_commit_master
*lcm_get(struct llog_commit_master *lcm)
{
- LASSERT(cfs_atomic_read(&lcm->lcm_refcount) > 0);
cfs_atomic_inc(&lcm->lcm_refcount);
return lcm;
}
static inline void
lcm_put(struct llog_commit_master *lcm)
{
- if (!cfs_atomic_dec_and_test(&lcm->lcm_refcount)) {
- return ;
- }
- OBD_FREE_PTR(lcm);
+ LASSERT_ATOMIC_POS(&lcm->lcm_refcount);
+ if (cfs_atomic_dec_and_test(&lcm->lcm_refcount))
+ OBD_FREE_PTR(lcm);
}
struct llog_canceld_ctxt {
{
struct obd_device *obd = ctxt->loc_exp->exp_obd;
+ LASSERTF(obd->u.obt.obt_magic == OBT_MAGIC,
+ "%s: wrong obt magic %#x\n",
+ obd->obd_name, obd->u.obt.obt_magic);
ctxt->loc_gen.mnt_cnt = obd->u.obt.obt_mount_count;
ctxt->loc_gen.conn_cnt++;
}
static inline int llog_handle2ops(struct llog_handle *loghandle,
struct llog_operations **lop)
{
- if (loghandle == NULL)
- return -EINVAL;
+ if (loghandle == NULL || loghandle->lgh_logops == NULL)
+ return -EINVAL;
- return llog_obd2ops(loghandle->lgh_ctxt, lop);
+ *lop = loghandle->lgh_logops;
+ return 0;
}
static inline int llog_data_len(int len)
static inline struct llog_ctxt *llog_ctxt_get(struct llog_ctxt *ctxt)
{
- LASSERT(cfs_atomic_read(&ctxt->loc_refcount) > 0);
cfs_atomic_inc(&ctxt->loc_refcount);
CDEBUG(D_INFO, "GETting ctxt %p : new refcount %d\n", ctxt,
cfs_atomic_read(&ctxt->loc_refcount));
{
if (ctxt == NULL)
return;
- LASSERT(cfs_atomic_read(&ctxt->loc_refcount) > 0);
- LASSERT(cfs_atomic_read(&ctxt->loc_refcount) < 0x5a5a5a);
+ LASSERT_ATOMIC_GT_LT(&ctxt->loc_refcount, 0, LI_POISON);
CDEBUG(D_INFO, "PUTting ctxt %p : new refcount %d\n", ctxt,
cfs_atomic_read(&ctxt->loc_refcount) - 1);
__llog_ctxt_put(ctxt);
{
cfs_waitq_init(&olg->olg_waitq);
cfs_spin_lock_init(&olg->olg_lock);
- cfs_sema_init(&olg->olg_cat_processing, 1);
+ cfs_mutex_init(&olg->olg_cat_processing);
olg->olg_seq = group;
}
return (llog_group_ctxt_null(&obd->obd_olg, 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)
+static inline int llog_write_rec(const struct lu_env *env,
+ struct llog_handle *handle,
+ struct llog_rec_hdr *rec,
+ struct llog_cookie *logcookies,
+ int numcookies, void *buf, int idx)
{
- struct llog_operations *lop;
- int raised, rc, buflen;
- ENTRY;
-
- rc = llog_handle2ops(handle, &lop);
- if (rc)
- RETURN(rc);
- LASSERT(lop);
- if (lop->lop_write_rec == NULL)
- RETURN(-EOPNOTSUPP);
-
- /* FIXME: Why doesn't caller just set the right lrh_len itself? */
- if (buf)
- buflen = rec->lrh_len + sizeof(struct llog_rec_hdr)
- + sizeof(struct llog_rec_tail);
- else
- buflen = rec->lrh_len;
- LASSERT(cfs_size_round(buflen) == buflen);
-
- raised = cfs_cap_raised(CFS_CAP_SYS_RESOURCE);
- if (!raised)
- cfs_cap_raise(CFS_CAP_SYS_RESOURCE);
- rc = lop->lop_write_rec(handle, rec, logcookies, numcookies, buf, idx);
- if (!raised)
- cfs_cap_lower(CFS_CAP_SYS_RESOURCE);
- RETURN(rc);
+ struct llog_operations *lop;
+ int raised, rc, buflen;
+
+ ENTRY;
+
+ rc = llog_handle2ops(handle, &lop);
+ if (rc)
+ RETURN(rc);
+ LASSERT(lop);
+ if (lop->lop_write_rec == NULL)
+ RETURN(-EOPNOTSUPP);
+
+ /* FIXME: Why doesn't caller just set the right lrh_len itself? */
+ if (buf)
+ buflen = rec->lrh_len + sizeof(struct llog_rec_hdr) +
+ sizeof(struct llog_rec_tail);
+ else
+ buflen = rec->lrh_len;
+ LASSERT(cfs_size_round(buflen) == buflen);
+
+ raised = cfs_cap_raised(CFS_CAP_SYS_RESOURCE);
+ if (!raised)
+ cfs_cap_raise(CFS_CAP_SYS_RESOURCE);
+ rc = lop->lop_write_rec(env, handle, rec, logcookies, numcookies,
+ buf, idx);
+ if (!raised)
+ cfs_cap_lower(CFS_CAP_SYS_RESOURCE);
+ RETURN(rc);
}
-static inline int llog_read_header(struct llog_handle *handle)
+static inline int llog_destroy(const struct lu_env *env,
+ 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);
+ 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(env, handle);
+ RETURN(rc);
}
-static inline int llog_destroy(struct llog_handle *handle)
+static inline int llog_next_block(const struct lu_env *env,
+ 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(handle, &lop);
- if (rc)
- RETURN(rc);
- if (lop->lop_destroy == NULL)
- RETURN(-EOPNOTSUPP);
-
- rc = lop->lop_destroy(handle);
- RETURN(rc);
+ 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(env, loghandle, cur_idx, next_idx,
+ cur_offset, buf, len);
+ 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)
+static inline int llog_prev_block(const struct lu_env *env,
+ struct llog_handle *loghandle,
+ int prev_idx, void *buf, int len)
{
- 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);
+ struct llog_operations *lop;
+ int rc;
+
+ ENTRY;
+
+ rc = llog_handle2ops(loghandle, &lop);
+ if (rc)
+ RETURN(rc);
+ if (lop->lop_prev_block == NULL)
+ RETURN(-EOPNOTSUPP);
+
+ rc = lop->lop_prev_block(env, loghandle, prev_idx, buf, len);
+ 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)
+static inline int llog_connect(struct llog_ctxt *ctxt,
+ struct llog_logid *logid, struct llog_gen *gen,
+ struct obd_uuid *uuid)
{
- 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);
+ 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, logid, gen, uuid);
+ RETURN(rc);
}
-static inline int llog_prev_block(struct llog_handle *loghandle,
- int prev_idx, void *buf, int len)
+/**
+ * new llog API
+ *
+ * API functions:
+ * llog_open - open llog, may not exist
+ * llog_exist - check if llog exists
+ * llog_close - close opened llog, pair for open, frees llog_handle
+ * llog_declare_create - declare llog creation
+ * llog_create - create new llog on disk, need transaction handle
+ */
+static inline int llog_exist(struct llog_handle *loghandle)
{
- struct llog_operations *lop;
- int rc;
- ENTRY;
-
- rc = llog_handle2ops(loghandle, &lop);
- if (rc)
- RETURN(rc);
- if (lop->lop_prev_block == NULL)
- RETURN(-EOPNOTSUPP);
-
- rc = lop->lop_prev_block(loghandle, prev_idx, buf, len);
- RETURN(rc);
+ struct llog_operations *lop;
+ int raised, rc;
+
+ ENTRY;
+
+ rc = llog_handle2ops(loghandle, &lop);
+ if (rc)
+ RETURN(rc);
+ if (lop->lop_exist == NULL)
+ RETURN(-EOPNOTSUPP);
+ raised = cfs_cap_raised(CFS_CAP_SYS_RESOURCE);
+ if (!raised)
+ cfs_cap_raise(CFS_CAP_SYS_RESOURCE);
+ rc = lop->lop_exist(loghandle);
+ if (!raised)
+ cfs_cap_lower(CFS_CAP_SYS_RESOURCE);
+ RETURN(rc);
}
-static inline int llog_create(struct llog_ctxt *ctxt, struct llog_handle **res,
- struct llog_logid *logid, char *name)
+static inline int llog_declare_create(const struct lu_env *env,
+ struct llog_handle *loghandle,
+ struct thandle *th)
{
- struct llog_operations *lop;
- int raised, rc;
- ENTRY;
-
- rc = llog_obd2ops(ctxt, &lop);
- if (rc)
- RETURN(rc);
- if (lop->lop_create == NULL)
- RETURN(-EOPNOTSUPP);
-
- raised = cfs_cap_raised(CFS_CAP_SYS_RESOURCE);
- if (!raised)
- cfs_cap_raise(CFS_CAP_SYS_RESOURCE);
- rc = lop->lop_create(ctxt, res, logid, name);
- if (!raised)
- cfs_cap_lower(CFS_CAP_SYS_RESOURCE);
- RETURN(rc);
+ struct llog_operations *lop;
+ int raised, rc;
+
+ ENTRY;
+
+ rc = llog_handle2ops(loghandle, &lop);
+ if (rc)
+ RETURN(rc);
+ if (lop->lop_declare_create == NULL)
+ RETURN(-EOPNOTSUPP);
+
+ raised = cfs_cap_raised(CFS_CAP_SYS_RESOURCE);
+ if (!raised)
+ cfs_cap_raise(CFS_CAP_SYS_RESOURCE);
+ rc = lop->lop_declare_create(env, loghandle, th);
+ if (!raised)
+ cfs_cap_lower(CFS_CAP_SYS_RESOURCE);
+ RETURN(rc);
}
-static inline int llog_connect(struct llog_ctxt *ctxt,
- struct llog_logid *logid, struct llog_gen *gen,
- struct obd_uuid *uuid)
+static inline int llog_create(const struct lu_env *env,
+ struct llog_handle *handle, struct thandle *th)
{
- 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, logid, gen, uuid);
- RETURN(rc);
+ struct llog_operations *lop;
+ int raised, rc;
+
+ ENTRY;
+
+ rc = llog_handle2ops(handle, &lop);
+ if (rc)
+ RETURN(rc);
+ if (lop->lop_create == NULL)
+ RETURN(-EOPNOTSUPP);
+
+ raised = cfs_cap_raised(CFS_CAP_SYS_RESOURCE);
+ if (!raised)
+ cfs_cap_raise(CFS_CAP_SYS_RESOURCE);
+ rc = lop->lop_create(env, handle, th);
+ if (!raised)
+ cfs_cap_lower(CFS_CAP_SYS_RESOURCE);
+ RETURN(rc);
}
int lustre_process_log(struct super_block *sb, char *logname,
struct config_llog_instance *cfg);
int lustre_end_log(struct super_block *sb, char *logname,
struct config_llog_instance *cfg);
+int llog_open_create(const struct lu_env *env, struct llog_ctxt *ctxt,
+ struct llog_handle **res, struct llog_logid *logid,
+ char *name);
+int llog_erase(const struct lu_env *env, struct llog_ctxt *ctxt,
+ struct llog_logid *logid, char *name);
+int llog_write(const struct lu_env *env, struct llog_handle *loghandle,
+ struct llog_rec_hdr *rec, struct llog_cookie *reccookie,
+ int cookiecount, void *buf, int idx);
/** @} log */
git://git.whamcloud.com / fs / lustre-release.git / blobdiff