*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
/*
- * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2011, 2012, Intel, Inc.
+ * Copyright (c) 2012, 2014 Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Lustre is a trademark of Sun Microsystems, Inc.
+ */
+/*
+ * lustre/obdclass/llog_osd.c
*
- * lustre/obdclass/llog_osd.c - low level llog routines on top of OSD API
+ * Low level llog routines on top of OSD API
+ *
+ * This file provides set of methods for llog operations on top of
+ * dt_device. It contains all supported llog_operations interfaces and
+ * supplimental functions.
*
* Author: Alexey Zhuravlev <alexey.zhuravlev@intel.com>
* Author: Mikhail Pershin <mike.pershin@intel.com>
#define DEBUG_SUBSYSTEM S_LOG
-#ifndef EXPORT_SYMTAB
-#define EXPORT_SYMTAB
-#endif
-
#include <obd.h>
#include <obd_class.h>
#include <lustre_fid.h>
#include "llog_internal.h"
#include "local_storage.h"
-/*
- * - multi-chunks or big-declaration approach
- * - use unique sequence instead of llog sb tracking unique ids
- * - re-use existing environment
- * - named llog support (can be used for testing only at the present)
- * - llog_origin_connect() work with OSD API
+/**
+ * Implementation of the llog_operations::lop_declare_create
+ *
+ * This function is a wrapper over local_storage API function
+ * local_object_declare_create().
+ *
+ * \param[in] env execution environment
+ * \param[in] los local_storage for bottom storage device
+ * \param[in] o dt_object to create
+ * \param[in] th current transaction handle
+ *
+ * \retval 0 on successful declaration of the new object
+ * \retval negative error if declaration was failed
*/
-
static int llog_osd_declare_new_object(const struct lu_env *env,
struct local_oid_storage *los,
struct dt_object *o,
&lgi->lgi_dof, th);
}
+/**
+ * Implementation of the llog_operations::lop_create
+ *
+ * This function is a wrapper over local_storage API function
+ * local_object_create().
+ *
+ * \param[in] env execution environment
+ * \param[in] los local_storage for bottom storage device
+ * \param[in] o dt_object to create
+ * \param[in] th current transaction handle
+ *
+ * \retval 0 on successful creation of the new object
+ * \retval negative error if creation was failed
+ */
static int llog_osd_create_new_object(const struct lu_env *env,
struct local_oid_storage *los,
struct dt_object *o,
&lgi->lgi_dof, th);
}
+/**
+ * Write a padding record to the llog
+ *
+ * This function writes a padding record to the end of llog. That may
+ * be needed if llog contains records of variable size, e.g. config logs
+ * or changelogs.
+ * The padding record just aligns llog to the llog chunk_size boundary if
+ * the current record doesn't fit in the remaining space.
+ *
+ * It allocates full length to avoid two separate writes for header and tail.
+ * Such 2-steps scheme needs extra protection and complex error handling.
+ *
+ * \param[in] env execution environment
+ * \param[in] o dt_object to create
+ * \param[in,out] off pointer to the padding start offset
+ * \param[in] len padding length
+ * \param[in] index index of the padding record in a llog
+ * \param[in] th current transaction handle
+ *
+ * \retval 0 on successful padding write
+ * \retval negative error if write failed
+ */
static int llog_osd_pad(const struct lu_env *env, struct dt_object *o,
loff_t *off, int len, int index, struct thandle *th)
{
struct llog_thread_info *lgi = llog_info(env);
+ struct llog_rec_hdr *rec;
+ struct llog_rec_tail *tail;
int rc;
ENTRY;
LASSERT(off);
LASSERT(len >= LLOG_MIN_REC_SIZE && (len & 0x7) == 0);
- lgi->lgi_tail.lrt_len = lgi->lgi_lrh.lrh_len = len;
- lgi->lgi_tail.lrt_index = lgi->lgi_lrh.lrh_index = index;
- lgi->lgi_lrh.lrh_type = LLOG_PAD_MAGIC;
-
- lgi->lgi_buf.lb_buf = &lgi->lgi_lrh;
- lgi->lgi_buf.lb_len = sizeof(lgi->lgi_lrh);
- dt_write_lock(env, o, 0);
- rc = dt_record_write(env, o, &lgi->lgi_buf, off, th);
- if (rc) {
- CERROR("%s: error writing padding record: rc = %d\n",
- o->do_lu.lo_dev->ld_obd->obd_name, rc);
- GOTO(out, rc);
- }
-
- lgi->lgi_buf.lb_buf = &lgi->lgi_tail;
- lgi->lgi_buf.lb_len = sizeof(lgi->lgi_tail);
- *off += len - sizeof(lgi->lgi_lrh) - sizeof(lgi->lgi_tail);
- rc = dt_record_write(env, o, &lgi->lgi_buf, off, th);
- if (rc)
- CERROR("%s: error writing padding record: rc = %d\n",
- o->do_lu.lo_dev->ld_obd->obd_name, rc);
-out:
- dt_write_unlock(env, o);
- RETURN(rc);
-}
+ OBD_ALLOC(rec, len);
+ if (rec == NULL)
+ RETURN(-ENOMEM);
-static int llog_osd_write_blob(const struct lu_env *env, struct dt_object *o,
- struct llog_rec_hdr *rec, void *buf,
- loff_t *off, struct thandle *th)
-{
- struct llog_thread_info *lgi = llog_info(env);
- int buflen = rec->lrh_len;
- int rc;
-
- ENTRY;
-
- LASSERT(env);
- LASSERT(o);
-
- if (buflen == 0)
- CWARN("0-length record\n");
+ rec->lrh_len = len;
+ rec->lrh_index = index;
+ rec->lrh_type = LLOG_PAD_MAGIC;
- CDEBUG(D_OTHER, "write blob with type %x, buf %p/%u at off %llu\n",
- rec->lrh_type, buf, buflen, *off);
+ tail = rec_tail(rec);
+ tail->lrt_len = len;
+ tail->lrt_index = index;
- if (!buf) {
- lgi->lgi_buf.lb_len = buflen;
- lgi->lgi_buf.lb_buf = rec;
- rc = dt_record_write(env, o, &lgi->lgi_buf, off, th);
- if (rc)
- CERROR("%s: error writing log record: rc = %d\n",
- o->do_lu.lo_dev->ld_obd->obd_name, rc);
- RETURN(rc);
- }
-
- /* the buf case */
- /* protect the following 3 writes from concurrent read */
- dt_write_lock(env, o, 0);
- rec->lrh_len = sizeof(*rec) + buflen + sizeof(lgi->lgi_tail);
- lgi->lgi_buf.lb_len = sizeof(*rec);
lgi->lgi_buf.lb_buf = rec;
- rc = dt_record_write(env, o, &lgi->lgi_buf, off, th);
- if (rc) {
- CERROR("%s: error writing log hdr: rc = %d\n",
- o->do_lu.lo_dev->ld_obd->obd_name, rc);
- GOTO(out, rc);
- }
-
- lgi->lgi_buf.lb_len = buflen;
- lgi->lgi_buf.lb_buf = buf;
- rc = dt_record_write(env, o, &lgi->lgi_buf, off, th);
- if (rc) {
- CERROR("%s: error writing log buffer: rc = %d\n",
- o->do_lu.lo_dev->ld_obd->obd_name, rc);
- GOTO(out, rc);
- }
-
- lgi->lgi_tail.lrt_len = rec->lrh_len;
- lgi->lgi_tail.lrt_index = rec->lrh_index;
- lgi->lgi_buf.lb_len = sizeof(lgi->lgi_tail);
- lgi->lgi_buf.lb_buf = &lgi->lgi_tail;
+ lgi->lgi_buf.lb_len = len;
rc = dt_record_write(env, o, &lgi->lgi_buf, off, th);
if (rc)
- CERROR("%s: error writing log tail: rc = %d\n",
+ CERROR("%s: error writing padding record: rc = %d\n",
o->do_lu.lo_dev->ld_obd->obd_name, rc);
-out:
- dt_write_unlock(env, o);
+
+ OBD_FREE(rec, len);
RETURN(rc);
}
+/**
+ * Implementation of the llog_operations::lop_read_header
+ *
+ * This function reads the current llog header from the bottom storage
+ * device.
+ *
+ * \param[in] env execution environment
+ * \param[in] handle llog handle of the current llog
+ *
+ * \retval 0 on successful header read
+ * \retval negative error if read failed
+ */
static int llog_osd_read_header(const struct lu_env *env,
struct llog_handle *handle)
{
struct llog_rec_hdr *llh_hdr;
struct dt_object *o;
struct llog_thread_info *lgi;
+ enum llog_flag flags;
int rc;
ENTRY;
- LASSERT(sizeof(*handle->lgh_hdr) == LLOG_CHUNK_SIZE);
-
o = handle->lgh_obj;
LASSERT(o);
lgi = llog_info(env);
- rc = dt_attr_get(env, o, &lgi->lgi_attr, NULL);
+ rc = dt_attr_get(env, o, &lgi->lgi_attr);
if (rc)
RETURN(rc);
RETURN(LLOG_EEMPTY);
}
+ flags = handle->lgh_hdr->llh_flags;
+
lgi->lgi_off = 0;
lgi->lgi_buf.lb_buf = handle->lgh_hdr;
- lgi->lgi_buf.lb_len = LLOG_CHUNK_SIZE;
-
- rc = dt_record_read(env, o, &lgi->lgi_buf, &lgi->lgi_off);
- if (rc) {
- CERROR("%s: error reading log header from "DFID": rc = %d\n",
+ lgi->lgi_buf.lb_len = handle->lgh_hdr_size;
+ rc = dt_read(env, o, &lgi->lgi_buf, &lgi->lgi_off);
+ llh_hdr = &handle->lgh_hdr->llh_hdr;
+ if (rc < sizeof(*llh_hdr) || rc < llh_hdr->lrh_len) {
+ CERROR("%s: error reading "DFID" log header size %d: rc = %d\n",
o->do_lu.lo_dev->ld_obd->obd_name,
- PFID(lu_object_fid(&o->do_lu)), rc);
+ PFID(lu_object_fid(&o->do_lu)), rc < 0 ? 0 : rc,
+ -EFAULT);
+
+ if (rc >= 0)
+ rc = -EFAULT;
+
RETURN(rc);
}
- llh_hdr = &handle->lgh_hdr->llh_hdr;
if (LLOG_REC_HDR_NEEDS_SWABBING(llh_hdr))
lustre_swab_llog_hdr(handle->lgh_hdr);
PFID(lu_object_fid(&o->do_lu)),
llh_hdr->lrh_type, LLOG_HDR_MAGIC);
RETURN(-EIO);
- } else if (llh_hdr->lrh_len != LLOG_CHUNK_SIZE) {
+ } else if (llh_hdr->lrh_len < LLOG_MIN_CHUNK_SIZE ||
+ llh_hdr->lrh_len > handle->lgh_hdr_size) {
CERROR("%s: incorrectly sized log %s "DFID" header: "
- "%#x (expected %#x)\n"
+ "%#x (expected at least %#x)\n"
"you may need to re-run lconf --write_conf.\n",
o->do_lu.lo_dev->ld_obd->obd_name,
handle->lgh_name ? handle->lgh_name : "",
PFID(lu_object_fid(&o->do_lu)),
- llh_hdr->lrh_len, LLOG_CHUNK_SIZE);
+ llh_hdr->lrh_len, LLOG_MIN_CHUNK_SIZE);
+ RETURN(-EIO);
+ } else if (LLOG_HDR_TAIL(handle->lgh_hdr)->lrt_index >
+ LLOG_HDR_BITMAP_SIZE(handle->lgh_hdr) ||
+ LLOG_HDR_TAIL(handle->lgh_hdr)->lrt_len !=
+ llh_hdr->lrh_len) {
+ CERROR("%s: incorrectly sized log %s "DFID" tailer: "
+ "%#x : rc = %d\n",
+ o->do_lu.lo_dev->ld_obd->obd_name,
+ handle->lgh_name ? handle->lgh_name : "",
+ PFID(lu_object_fid(&o->do_lu)),
+ LLOG_HDR_TAIL(handle->lgh_hdr)->lrt_len, -EIO);
RETURN(-EIO);
}
- handle->lgh_last_idx = handle->lgh_hdr->llh_tail.lrt_index;
+ handle->lgh_hdr->llh_flags |= (flags & LLOG_F_EXT_MASK);
+ handle->lgh_last_idx = LLOG_HDR_TAIL(handle->lgh_hdr)->lrt_index;
RETURN(0);
}
+/**
+ * Implementation of the llog_operations::lop_declare_write
+ *
+ * This function declares the new record write.
+ *
+ * \param[in] env execution environment
+ * \param[in] loghandle llog handle of the current llog
+ * \param[in] rec llog record header. This is a real header of the full
+ * llog record to write. This is the beginning of buffer
+ * to write, the length of buffer is stored in
+ * \a rec::lrh_len
+ * \param[in] idx index of the llog record. If \a idx == -1 then this is
+ * append case, otherwise \a idx is the index of record
+ * to modify
+ * \param[in] th current transaction handle
+ *
+ * \retval 0 on successful declaration
+ * \retval negative error if declaration failed
+ */
static int llog_osd_declare_write_rec(const struct lu_env *env,
struct llog_handle *loghandle,
struct llog_rec_hdr *rec,
int idx, struct thandle *th)
{
struct llog_thread_info *lgi = llog_info(env);
+ __u32 chunk_size;
struct dt_object *o;
int rc;
LASSERT(env);
LASSERT(th);
LASSERT(loghandle);
+ LASSERT(rec);
+ LASSERT(rec->lrh_len <= loghandle->lgh_ctxt->loc_chunk_size);
o = loghandle->lgh_obj;
LASSERT(o);
+ chunk_size = loghandle->lgh_ctxt->loc_chunk_size;
+ lgi->lgi_buf.lb_len = chunk_size;
+ lgi->lgi_buf.lb_buf = NULL;
/* each time we update header */
- rc = dt_declare_record_write(env, o, sizeof(struct llog_log_hdr), 0,
+ rc = dt_declare_record_write(env, o, &lgi->lgi_buf, 0,
th);
if (rc || idx == 0) /* if error or just header */
RETURN(rc);
- if (dt_object_exists(o)) {
- rc = dt_attr_get(env, o, &lgi->lgi_attr, BYPASS_CAPA);
- lgi->lgi_off = lgi->lgi_attr.la_size;
- LASSERT(ergo(rc == 0, lgi->lgi_attr.la_valid & LA_SIZE));
- if (rc)
- RETURN(rc);
- } else {
- lgi->lgi_off = 0;
- }
-
+ /**
+ * the pad record can be inserted so take into account double
+ * record size
+ */
+ lgi->lgi_buf.lb_len = chunk_size * 2;
+ lgi->lgi_buf.lb_buf = NULL;
/* XXX: implement declared window or multi-chunks approach */
- rc = dt_declare_record_write(env, o, 32 * 1024, lgi->lgi_off, th);
+ rc = dt_declare_record_write(env, o, &lgi->lgi_buf, -1, th);
RETURN(rc);
}
-/* returns negative in on error; 0 if success && reccookie == 0; 1 otherwise */
-/* appends if idx == -1, otherwise overwrites record idx. */
+/**
+ * Implementation of the llog_operations::lop_write
+ *
+ * This function writes the new record in the llog or modify the existed one.
+ *
+ * \param[in] env execution environment
+ * \param[in] loghandle llog handle of the current llog
+ * \param[in] rec llog record header. This is a real header of
+ * the full llog record to write. This is
+ * the beginning of buffer to write, the length
+ * of buffer is stored in \a rec::lrh_len
+ * \param[out] reccookie pointer to the cookie to return back if needed.
+ * It is used for further cancel of this llog
+ * record.
+ * \param[in] idx index of the llog record. If \a idx == -1 then
+ * this is append case, otherwise \a idx is
+ * the index of record to modify
+ * \param[in] th current transaction handle
+ *
+ * \retval 0 on successful write && \a reccookie == NULL
+ * 1 on successful write && \a reccookie != NULL
+ * \retval negative error if write failed
+ */
static int llog_osd_write_rec(const struct lu_env *env,
struct llog_handle *loghandle,
struct llog_rec_hdr *rec,
- struct llog_cookie *reccookie, int cookiecount,
- void *buf, int idx, struct thandle *th)
+ struct llog_cookie *reccookie,
+ int idx, struct thandle *th)
{
struct llog_thread_info *lgi = llog_info(env);
struct llog_log_hdr *llh;
int index, rc;
struct llog_rec_tail *lrt;
struct dt_object *o;
+ __u32 chunk_size;
size_t left;
ENTRY;
LASSERT(o);
LASSERT(th);
+ chunk_size = llh->llh_hdr.lrh_len;
CDEBUG(D_OTHER, "new record %x to "DFID"\n",
rec->lrh_type, PFID(lu_object_fid(&o->do_lu)));
- /* record length should not bigger than LLOG_CHUNK_SIZE */
- if (buf)
- rc = (reclen > LLOG_CHUNK_SIZE - sizeof(struct llog_rec_hdr) -
- sizeof(struct llog_rec_tail)) ? -E2BIG : 0;
- else
- rc = (reclen > LLOG_CHUNK_SIZE) ? -E2BIG : 0;
- if (rc)
- RETURN(rc);
+ /* record length should not bigger than */
+ if (reclen > loghandle->lgh_hdr->llh_hdr.lrh_len)
+ RETURN(-E2BIG);
- rc = dt_attr_get(env, o, &lgi->lgi_attr, NULL);
+ rc = dt_attr_get(env, o, &lgi->lgi_attr);
if (rc)
RETURN(rc);
- if (buf)
- /* write_blob adds header and tail to lrh_len. */
- reclen = sizeof(*rec) + rec->lrh_len +
- sizeof(struct llog_rec_tail);
-
- if (idx != -1) {
- /* no header: only allowed to insert record 1 */
- if (idx != 1 && lgi->lgi_attr.la_size == 0)
- LBUG();
-
- if (idx && llh->llh_size && llh->llh_size != rec->lrh_len)
- RETURN(-EINVAL);
+ /**
+ * The modification case.
+ * If idx set then the record with that index must be modified.
+ * There are three cases possible:
+ * 1) the common case is the llog header update (idx == 0)
+ * 2) the llog record modification during llog process.
+ * This is indicated by the \a loghandle::lgh_cur_idx > 0.
+ * In that case the \a loghandle::lgh_cur_offset
+ * 3) otherwise this is assumed that llog consist of records of
+ * fixed size, i.e. catalog. The llog header must has llh_size
+ * field equal to record size. The record offset is calculated
+ * just by /a idx value
+ *
+ * During modification we don't need extra header update because
+ * the bitmap and record count are not changed. The record header
+ * and tail remains the same too.
+ */
+ if (idx != LLOG_NEXT_IDX) {
+ /* llog can be empty only when first record is being written */
+ LASSERT(ergo(idx > 0, lgi->lgi_attr.la_size > 0));
- if (!ext2_test_bit(idx, llh->llh_bitmap))
+ if (!ext2_test_bit(idx, LLOG_HDR_BITMAP(llh))) {
CERROR("%s: modify unset record %u\n",
o->do_lu.lo_dev->ld_obd->obd_name, idx);
- if (idx != rec->lrh_index)
- CERROR("%s: index mismatch %d %u\n",
+ RETURN(-ENOENT);
+ }
+
+ if (idx != rec->lrh_index) {
+ CERROR("%s: modify index mismatch %d %u\n",
o->do_lu.lo_dev->ld_obd->obd_name, idx,
rec->lrh_index);
+ RETURN(-EFAULT);
+ }
- lgi->lgi_off = 0;
- rc = llog_osd_write_blob(env, o, &llh->llh_hdr, NULL,
- &lgi->lgi_off, th);
- /* we are done if we only write the header or on error */
- if (rc || idx == 0)
- RETURN(rc);
+ if (idx == LLOG_HEADER_IDX) {
+ /* llog header update */
+ LASSERT(reclen >= sizeof(struct llog_log_hdr));
+ LASSERT(rec == &llh->llh_hdr);
- if (buf) {
- /* We assume that caller has set lgh_cur_* */
- lgi->lgi_off = loghandle->lgh_cur_offset;
- CDEBUG(D_OTHER,
- "modify record "LPX64": idx:%d/%u/%d, len:%u "
- "offset %llu\n",
- loghandle->lgh_id.lgl_oid, idx, rec->lrh_index,
- loghandle->lgh_cur_idx, rec->lrh_len,
- (long long)(lgi->lgi_off - sizeof(*llh)));
- if (rec->lrh_index != loghandle->lgh_cur_idx) {
- CERROR("%s: modify idx mismatch %u/%d\n",
+ lgi->lgi_off = 0;
+ lgi->lgi_buf.lb_len = reclen;
+ lgi->lgi_buf.lb_buf = rec;
+ rc = dt_record_write(env, o, &lgi->lgi_buf,
+ &lgi->lgi_off, th);
+ RETURN(rc);
+ } else if (loghandle->lgh_cur_idx > 0) {
+ /**
+ * The lgh_cur_offset can be used only if index is
+ * the same.
+ */
+ if (idx != loghandle->lgh_cur_idx) {
+ CERROR("%s: modify index mismatch %d %d\n",
o->do_lu.lo_dev->ld_obd->obd_name, idx,
loghandle->lgh_cur_idx);
RETURN(-EFAULT);
}
- } else {
- /* Assumes constant lrh_len */
+
+ lgi->lgi_off = loghandle->lgh_cur_offset;
+ CDEBUG(D_OTHER, "modify record "DOSTID": idx:%d, "
+ "len:%u offset %llu\n",
+ POSTID(&loghandle->lgh_id.lgl_oi), idx,
+ rec->lrh_len, (long long)lgi->lgi_off);
+ } else if (llh->llh_size > 0) {
+ if (llh->llh_size != rec->lrh_len) {
+ CERROR("%s: wrong record size, llh_size is %u"
+ " but record size is %u\n",
+ o->do_lu.lo_dev->ld_obd->obd_name,
+ llh->llh_size, rec->lrh_len);
+ RETURN(-EINVAL);
+ }
lgi->lgi_off = sizeof(*llh) + (idx - 1) * reclen;
+ } else {
+ /* This can be result of lgh_cur_idx is not set during
+ * llog processing or llh_size is not set to proper
+ * record size for fixed records llog. Therefore it is
+ * impossible to get record offset. */
+ CERROR("%s: can't get record offset, idx:%d, "
+ "len:%u.\n", o->do_lu.lo_dev->ld_obd->obd_name,
+ idx, rec->lrh_len);
+ RETURN(-EFAULT);
}
- rc = llog_osd_write_blob(env, o, rec, buf, &lgi->lgi_off, th);
+ /* update only data, header and tail remain the same */
+ lgi->lgi_off += sizeof(struct llog_rec_hdr);
+ lgi->lgi_buf.lb_len = REC_DATA_LEN(rec);
+ lgi->lgi_buf.lb_buf = REC_DATA(rec);
+ rc = dt_record_write(env, o, &lgi->lgi_buf, &lgi->lgi_off, th);
if (rc == 0 && reccookie) {
reccookie->lgc_lgl = loghandle->lgh_id;
reccookie->lgc_index = idx;
RETURN(rc);
}
- /* Make sure that records don't cross a chunk boundary, so we can
+ /**
+ * The append case.
+ * The most common case of using llog. The new index is assigned to
+ * the new record, new bit is set in llog bitmap and llog count is
+ * incremented.
+ *
+ * Make sure that records don't cross a chunk boundary, so we can
* process them page-at-a-time if needed. If it will cross a chunk
* boundary, write in a fake (but referenced) entry to pad the chunk.
- *
- * We know that llog_current_log() will return a loghandle that is
- * big enough to hold reclen, so all we care about is padding here.
*/
LASSERT(lgi->lgi_attr.la_valid & LA_SIZE);
lgi->lgi_off = lgi->lgi_attr.la_size;
- left = LLOG_CHUNK_SIZE - (lgi->lgi_off & (LLOG_CHUNK_SIZE - 1));
+ left = chunk_size - (lgi->lgi_off & (chunk_size - 1));
/* NOTE: padding is a record, but no bit is set */
if (left != 0 && left != reclen &&
left < (reclen + LLOG_MIN_REC_SIZE)) {
rc = llog_osd_pad(env, o, &lgi->lgi_off, left, index, th);
if (rc)
RETURN(rc);
- loghandle->lgh_last_idx++; /*for pad rec*/
+ loghandle->lgh_last_idx++; /* for pad rec */
}
/* if it's the last idx in log file, then return -ENOSPC */
- if (loghandle->lgh_last_idx >= LLOG_BITMAP_SIZE(llh) - 1)
+ if (loghandle->lgh_last_idx >= LLOG_HDR_BITMAP_SIZE(llh) - 1)
RETURN(-ENOSPC);
+ /* increment the last_idx along with llh_tail index, they should
+ * be equal for a llog lifetime */
loghandle->lgh_last_idx++;
index = loghandle->lgh_last_idx;
- LASSERT(index < LLOG_BITMAP_SIZE(llh));
+ LLOG_HDR_TAIL(llh)->lrt_index = index;
+ /**
+ * NB: the caller should make sure only 1 process access
+ * the lgh_last_idx, e.g. append should be exclusive.
+ * Otherwise it might hit the assert.
+ */
+ LASSERT(index < LLOG_HDR_BITMAP_SIZE(llh));
rec->lrh_index = index;
- if (buf == NULL) {
- lrt = (struct llog_rec_tail *)((char *)rec + rec->lrh_len -
- sizeof(*lrt));
- lrt->lrt_len = rec->lrh_len;
- lrt->lrt_index = rec->lrh_index;
- }
- /* The caller should make sure only 1 process access the lgh_last_idx,
- * Otherwise it might hit the assert.*/
- LASSERT(index < LLOG_BITMAP_SIZE(llh));
- cfs_spin_lock(&loghandle->lgh_hdr_lock);
- if (ext2_set_bit(index, llh->llh_bitmap)) {
+ lrt = rec_tail(rec);
+ lrt->lrt_len = rec->lrh_len;
+ lrt->lrt_index = rec->lrh_index;
+
+ /* the lgh_hdr_lock protects llog header data from concurrent
+ * update/cancel, the llh_count and llh_bitmap are protected */
+ down_write(&loghandle->lgh_hdr_lock);
+ if (ext2_set_bit(index, LLOG_HDR_BITMAP(llh))) {
CERROR("%s: index %u already set in log bitmap\n",
o->do_lu.lo_dev->ld_obd->obd_name, index);
- cfs_spin_unlock(&loghandle->lgh_hdr_lock);
+ up_write(&loghandle->lgh_hdr_lock);
LBUG(); /* should never happen */
}
llh->llh_count++;
- cfs_spin_unlock(&loghandle->lgh_hdr_lock);
- llh->llh_tail.lrt_index = index;
- lgi->lgi_off = 0;
- rc = llog_osd_write_blob(env, o, &llh->llh_hdr, NULL, &lgi->lgi_off,
- th);
- if (rc)
- RETURN(rc);
+ /* XXX It is a bit tricky here, if the log object is local,
+ * we do not need lock during write here, because if there is
+ * race, the transaction(jbd2, what about ZFS?) will make sure the
+ * conflicts will all committed in the same transaction group.
+ * But for remote object, we need lock the whole process, so to
+ * set the version of the remote transaction to make sure they
+ * are being sent in order. (see osp_md_write()) */
+ if (!dt_object_remote(o))
+ up_write(&loghandle->lgh_hdr_lock);
+
+ if (lgi->lgi_attr.la_size == 0) {
+ lgi->lgi_off = 0;
+ lgi->lgi_buf.lb_len = llh->llh_hdr.lrh_len;
+ lgi->lgi_buf.lb_buf = &llh->llh_hdr;
+ rc = dt_record_write(env, o, &lgi->lgi_buf, &lgi->lgi_off, th);
+ if (rc != 0)
+ GOTO(out_remote_unlock, rc);
+ } else {
+ /* Note: If this is not initialization (size == 0), then do not
+ * write the whole header (8k bytes), only update header/tail
+ * and bits needs to be updated. Because this update might be
+ * part of cross-MDT operation, which needs to write these
+ * updates into the update log(32KB limit) and also pack inside
+ * the RPC (1MB limit), if we write 8K for each operation, which
+ * will cost a lot space, and keep us adding more updates to one
+ * update log.*/
+ lgi->lgi_off = offsetof(typeof(*llh), llh_count);
+ lgi->lgi_buf.lb_len = sizeof(llh->llh_count);
+ lgi->lgi_buf.lb_buf = &llh->llh_count;
+ rc = dt_record_write(env, o, &lgi->lgi_buf, &lgi->lgi_off, th);
+ if (rc != 0)
+ GOTO(out_remote_unlock, rc);
+
+ lgi->lgi_off = offsetof(typeof(*llh),
+ llh_bitmap[index / (sizeof(*llh->llh_bitmap) * 8)]);
+ lgi->lgi_buf.lb_len = sizeof(*llh->llh_bitmap);
+ lgi->lgi_buf.lb_buf =
+ &llh->llh_bitmap[index/(sizeof(*llh->llh_bitmap)*8)];
+ rc = dt_record_write(env, o, &lgi->lgi_buf, &lgi->lgi_off, th);
+ if (rc != 0)
+ GOTO(out_remote_unlock, rc);
+
+ lgi->lgi_off = (unsigned long)LLOG_HDR_TAIL(llh) -
+ (unsigned long)llh;
+ lgi->lgi_buf.lb_len = sizeof(llh->llh_tail);
+ lgi->lgi_buf.lb_buf = LLOG_HDR_TAIL(llh);
+ rc = dt_record_write(env, o, &lgi->lgi_buf, &lgi->lgi_off, th);
+ if (rc != 0)
+ GOTO(out_remote_unlock, rc);
+ }
- rc = dt_attr_get(env, o, &lgi->lgi_attr, NULL);
+out_remote_unlock:
+ /* unlock here for remote object */
+ if (dt_object_remote(o))
+ up_write(&loghandle->lgh_hdr_lock);
if (rc)
- RETURN(rc);
- LASSERT(lgi->lgi_attr.la_valid & LA_SIZE);
- lgi->lgi_off = lgi->lgi_attr.la_size;
+ GOTO(out, rc);
- rc = llog_osd_write_blob(env, o, rec, buf, &lgi->lgi_off, th);
+ rc = dt_attr_get(env, o, &lgi->lgi_attr);
if (rc)
- RETURN(rc);
+ GOTO(out, rc);
+
+ LASSERT(lgi->lgi_attr.la_valid & LA_SIZE);
+ lgi->lgi_off = max_t(__u64, lgi->lgi_attr.la_size, lgi->lgi_off);
+ lgi->lgi_buf.lb_len = reclen;
+ lgi->lgi_buf.lb_buf = rec;
+ rc = dt_record_write(env, o, &lgi->lgi_buf, &lgi->lgi_off, th);
+ if (rc < 0)
+ GOTO(out, rc);
- CDEBUG(D_RPCTRACE, "added record "LPX64": idx: %u, %u\n",
- loghandle->lgh_id.lgl_oid, index, rec->lrh_len);
- if (rc == 0 && reccookie) {
+ CDEBUG(D_OTHER, "added record "DOSTID": idx: %u, %u off"LPU64"\n",
+ POSTID(&loghandle->lgh_id.lgl_oi), index, rec->lrh_len,
+ lgi->lgi_off);
+ if (reccookie != NULL) {
reccookie->lgc_lgl = loghandle->lgh_id;
reccookie->lgc_index = index;
if ((rec->lrh_type == MDS_UNLINK_REC) ||
rc = 1;
}
RETURN(rc);
+out:
+ /* cleanup llog for error case */
+ down_write(&loghandle->lgh_hdr_lock);
+ ext2_clear_bit(index, LLOG_HDR_BITMAP(llh));
+ llh->llh_count--;
+ up_write(&loghandle->lgh_hdr_lock);
+
+ /* restore llog last_idx */
+ loghandle->lgh_last_idx--;
+ LLOG_HDR_TAIL(llh)->lrt_index = loghandle->lgh_last_idx;
+
+ RETURN(rc);
}
-/* We can skip reading at least as many log blocks as the number of
+/**
+ * We can skip reading at least as many log blocks as the number of
* minimum sized log records we are skipping. If it turns out
* that we are not far enough along the log (because the
* actual records are larger than minimum size) we just skip
* some more records.
*/
-static void llog_skip_over(__u64 *off, int curr, int goal)
+static inline void llog_skip_over(struct llog_log_hdr *llh, __u64 *off,
+ int curr, int goal, __u32 chunk_size)
{
- if (goal <= curr)
+ if (goal > curr) {
+ if (llh->llh_size == 0) {
+ /* variable size records */
+ *off = (*off + (goal - curr - 1) * LLOG_MIN_REC_SIZE);
+ } else {
+ *off = chunk_size + (goal - 1) * llh->llh_size;
+ }
+ }
+ /* always align with lower chunk boundary*/
+ *off &= ~(chunk_size - 1);
+}
+
+/**
+ * Remove optional fields that the client doesn't expect.
+ * This is typically in order to ensure compatibility with older clients.
+ * It is assumed that since we exclusively remove fields, the block will be
+ * big enough to handle the remapped records. It is also assumed that records
+ * of a block have the same format (i.e.: the same features enabled).
+ *
+ * \param[in,out] hdr Header of the block of records to remap.
+ * \param[in,out] last_hdr Last header, don't read past this point.
+ * \param[in] flags Flags describing the fields to keep.
+ */
+static void changelog_block_trim_ext(struct llog_rec_hdr *hdr,
+ struct llog_rec_hdr *last_hdr,
+ enum changelog_rec_flags flags)
+{
+ if (hdr->lrh_type != CHANGELOG_REC)
return;
- *off = (*off + (goal - curr - 1) * LLOG_MIN_REC_SIZE) &
- ~(LLOG_CHUNK_SIZE - 1);
+
+ do {
+ struct changelog_rec *rec = (struct changelog_rec *)(hdr + 1);
+
+ changelog_remap_rec(rec, rec->cr_flags & flags);
+ hdr = llog_rec_hdr_next(hdr);
+ } while ((char *)hdr <= (char *)last_hdr);
}
-/* sets:
- * - cur_offset to the furthest point read in the log file
- * - cur_idx to the log index preceeding cur_offset
- * returns -EIO/-EINVAL on error
+/**
+ * Implementation of the llog_operations::lop_next_block
+ *
+ * This function finds the the next llog block to return which contains
+ * record with required index. It is main part of llog processing.
+ *
+ * \param[in] env execution environment
+ * \param[in] loghandle llog handle of the current llog
+ * \param[in,out] cur_idx index preceeding cur_offset
+ * \param[in] next_idx target index to find
+ * \param[in,out] cur_offset furtherst point read in the file
+ * \param[in] buf pointer to data buffer to fill
+ * \param[in] len required len to read, it is
+ * usually llog chunk_size.
+ *
+ * \retval 0 on successful buffer read
+ * \retval negative value on error
*/
static int llog_osd_next_block(const struct lu_env *env,
struct llog_handle *loghandle, int *cur_idx,
struct dt_object *o;
struct dt_device *dt;
int rc;
+ __u32 chunk_size;
ENTRY;
LASSERT(env);
LASSERT(lgi);
- if (len == 0 || len & (LLOG_CHUNK_SIZE - 1))
+ chunk_size = loghandle->lgh_hdr->llh_hdr.lrh_len;
+ if (len == 0 || len & (chunk_size - 1))
RETURN(-EINVAL);
CDEBUG(D_OTHER, "looking for log index %u (cur idx %u off "LPU64")\n",
dt = lu2dt_dev(o->do_lu.lo_dev);
LASSERT(dt);
- rc = dt_attr_get(env, o, &lgi->lgi_attr, BYPASS_CAPA);
+ rc = dt_attr_get(env, o, &lgi->lgi_attr);
if (rc)
GOTO(out, rc);
struct llog_rec_hdr *rec, *last_rec;
struct llog_rec_tail *tail;
- llog_skip_over(cur_offset, *cur_idx, next_idx);
+ llog_skip_over(loghandle->lgh_hdr, cur_offset, *cur_idx,
+ next_idx, chunk_size);
- /* read up to next LLOG_CHUNK_SIZE block */
- lgi->lgi_buf.lb_len = LLOG_CHUNK_SIZE -
- (*cur_offset & (LLOG_CHUNK_SIZE - 1));
+ /* read up to next llog chunk_size block */
+ lgi->lgi_buf.lb_len = chunk_size -
+ (*cur_offset & (chunk_size - 1));
lgi->lgi_buf.lb_buf = buf;
- /* Note: read lock is not needed around la_size get above at
- * the time of dt_attr_get(). There are only two cases that
- * matter. Either la_size == cur_offset, in which case the
- * entire read is skipped, or la_size > cur_offset and the loop
- * is entered and this thread is blocked at dt_read_lock()
- * until the write is completed. When the write completes, then
- * the dt_read() will be done with the full length, and will
- * get the full data.
- */
- dt_read_lock(env, o, 0);
rc = dt_read(env, o, &lgi->lgi_buf, cur_offset);
- dt_read_unlock(env, o);
if (rc < 0) {
CERROR("%s: can't read llog block from log "DFID
" offset "LPU64": rc = %d\n",
GOTO(out, rc);
if (rc < sizeof(*tail)) {
- CERROR("%s: invalid llog block at log id "LPU64"/%u "
+ CERROR("%s: invalid llog block at log id "DOSTID"/%u "
"offset "LPU64"\n",
o->do_lu.lo_dev->ld_obd->obd_name,
- loghandle->lgh_id.lgl_oid,
+ POSTID(&loghandle->lgh_id.lgl_oi),
loghandle->lgh_id.lgl_ogen, *cur_offset);
GOTO(out, rc = -EINVAL);
}
sizeof(struct llog_rec_tail));
/* get the last record in block */
last_rec = (struct llog_rec_hdr *)((char *)buf + rc -
- le32_to_cpu(tail->lrt_len));
+ tail->lrt_len);
if (LLOG_REC_HDR_NEEDS_SWABBING(last_rec))
lustre_swab_llog_rec(last_rec);
/* this shouldn't happen */
if (tail->lrt_index == 0) {
- CERROR("%s: invalid llog tail at log id "LPU64"/%u "
+ CERROR("%s: invalid llog tail at log id "DOSTID"/%u "
"offset "LPU64"\n",
o->do_lu.lo_dev->ld_obd->obd_name,
- loghandle->lgh_id.lgl_oid,
+ POSTID(&loghandle->lgh_id.lgl_oi),
loghandle->lgh_id.lgl_ogen, *cur_offset);
GOTO(out, rc = -EINVAL);
}
rec->lrh_index, next_idx);
GOTO(out, rc = -ENOENT);
}
+
+ /* Trim unsupported extensions for compat w/ older clients */
+ if (!(loghandle->lgh_hdr->llh_flags & LLOG_F_EXT_JOBID))
+ changelog_block_trim_ext(rec, last_rec,
+ CLF_VERSION | CLF_RENAME);
+
GOTO(out, rc = 0);
}
GOTO(out, rc = -EIO);
return rc;
}
+/**
+ * Implementation of the llog_operations::lop_prev_block
+ *
+ * This function finds the llog block to return which contains
+ * record with required index but in reverse order - from end of llog
+ * to the beginning.
+ * It is main part of reverse llog processing.
+ *
+ * \param[in] env execution environment
+ * \param[in] loghandle llog handle of the current llog
+ * \param[in] prev_idx target index to find
+ * \param[in] buf pointer to data buffer to fill
+ * \param[in] len required len to read, it is llog_chunk_size usually.
+ *
+ * \retval 0 on successful buffer read
+ * \retval negative value on error
+ */
static int llog_osd_prev_block(const struct lu_env *env,
struct llog_handle *loghandle,
int prev_idx, void *buf, int len)
struct dt_object *o;
struct dt_device *dt;
loff_t cur_offset;
+ __u32 chunk_size;
int rc;
ENTRY;
- if (len == 0 || len & (LLOG_CHUNK_SIZE - 1))
+ chunk_size = loghandle->lgh_hdr->llh_hdr.lrh_len;
+ if (len == 0 || len & (chunk_size - 1))
RETURN(-EINVAL);
CDEBUG(D_OTHER, "looking for log index %u\n", prev_idx);
dt = lu2dt_dev(o->do_lu.lo_dev);
LASSERT(dt);
- cur_offset = LLOG_CHUNK_SIZE;
- llog_skip_over(&cur_offset, 0, prev_idx);
+ cur_offset = chunk_size;
+ llog_skip_over(loghandle->lgh_hdr, &cur_offset, 0, prev_idx,
+ chunk_size);
- rc = dt_attr_get(env, o, &lgi->lgi_attr, BYPASS_CAPA);
+ rc = dt_attr_get(env, o, &lgi->lgi_attr);
if (rc)
GOTO(out, rc);
lgi->lgi_buf.lb_len = len;
lgi->lgi_buf.lb_buf = buf;
- /* It is OK to have locking around dt_read() only, see
- * comment in llog_osd_next_block for details
- */
- dt_read_lock(env, o, 0);
rc = dt_read(env, o, &lgi->lgi_buf, &cur_offset);
- dt_read_unlock(env, o);
if (rc < 0) {
CERROR("%s: can't read llog block from log "DFID
" offset "LPU64": rc = %d\n",
GOTO(out, rc);
if (rc < sizeof(*tail)) {
- CERROR("%s: invalid llog block at log id "LPU64"/%u "
+ CERROR("%s: invalid llog block at log id "DOSTID"/%u "
"offset "LPU64"\n",
o->do_lu.lo_dev->ld_obd->obd_name,
- loghandle->lgh_id.lgl_oid,
+ POSTID(&loghandle->lgh_id.lgl_oi),
loghandle->lgh_id.lgl_ogen, cur_offset);
GOTO(out, rc = -EINVAL);
}
/* this shouldn't happen */
if (tail->lrt_index == 0) {
- CERROR("%s: invalid llog tail at log id "LPU64"/%u "
+ CERROR("%s: invalid llog tail at log id "DOSTID"/%u "
"offset "LPU64"\n",
o->do_lu.lo_dev->ld_obd->obd_name,
- loghandle->lgh_id.lgl_oid,
+ POSTID(&loghandle->lgh_id.lgl_oi),
loghandle->lgh_id.lgl_ogen, cur_offset);
GOTO(out, rc = -EINVAL);
}
rec->lrh_index, prev_idx);
GOTO(out, rc = -ENOENT);
}
+
+ /* Trim unsupported extensions for compat w/ older clients */
+ if (!(loghandle->lgh_hdr->llh_flags & LLOG_F_EXT_JOBID))
+ changelog_block_trim_ext(rec, last_rec,
+ CLF_VERSION | CLF_RENAME);
+
GOTO(out, rc = 0);
}
GOTO(out, rc = -EIO);
return rc;
}
-struct dt_object *llog_osd_dir_get(const struct lu_env *env,
- struct llog_ctxt *ctxt)
+/**
+ * This is helper function to get llog directory object. It is used by named
+ * llog operations to find/insert/delete llog entry from llog directory.
+ *
+ * \param[in] env execution environment
+ * \param[in] ctxt llog context
+ *
+ * \retval dt_object of llog directory
+ * \retval ERR_PTR of negative value on error
+ */
+static struct dt_object *llog_osd_dir_get(const struct lu_env *env,
+ struct llog_ctxt *ctxt)
{
struct dt_device *dt;
struct dt_thread_info *dti = dt_info(env);
if (rc)
return ERR_PTR(rc);
dir = dt_locate(env, dt, &dti->dti_fid);
+
+ if (!IS_ERR(dir) && !dt_try_as_dir(env, dir)) {
+ lu_object_put(env, &dir->do_lu);
+ return ERR_PTR(-ENOTDIR);
+ }
} else {
lu_object_get(&ctxt->loc_dir->do_lu);
dir = ctxt->loc_dir;
return dir;
}
+/**
+ * Implementation of the llog_operations::lop_open
+ *
+ * This function opens the llog by its logid or by name, it may open also
+ * non existent llog and assing then new id to it.
+ * The llog_open/llog_close pair works similar to lu_object_find/put,
+ * the object may not exist prior open. The result of open is just dt_object
+ * in the llog header.
+ *
+ * \param[in] env execution environment
+ * \param[in] handle llog handle of the current llog
+ * \param[in] logid logid of llog to open (nameless llog)
+ * \param[in] name name of llog to open (named llog)
+ * \param[in] open_param
+ * LLOG_OPEN_NEW - new llog, may not exist
+ * LLOG_OPEN_EXIST - old llog, must exist
+ *
+ * \retval 0 on successful open, llog_handle::lgh_obj
+ * contains the dt_object of the llog.
+ * \retval negative value on error
+ */
static int llog_osd_open(const struct lu_env *env, struct llog_handle *handle,
struct llog_logid *logid, char *name,
enum llog_open_param open_param)
struct dt_object *o;
struct dt_device *dt;
struct ls_device *ls;
- struct local_oid_storage *los;
+ struct local_oid_storage *los = NULL;
int rc = 0;
ENTRY;
LASSERT(ctxt->loc_exp->exp_obd);
dt = ctxt->loc_exp->exp_obd->obd_lvfs_ctxt.dt;
LASSERT(dt);
+ if (ctxt->loc_flags & LLOG_CTXT_FLAG_NORMAL_FID) {
+ if (logid != NULL) {
+ logid_to_fid(logid, &lgi->lgi_fid);
+ } else {
+ /* If logid == NULL, then it means the caller needs
+ * to allocate new FID (llog_cat_declare_add_rec()). */
+ rc = obd_fid_alloc(env, ctxt->loc_exp,
+ &lgi->lgi_fid, NULL);
+ if (rc < 0)
+ RETURN(rc);
+ rc = 0;
+ }
+
+ o = dt_locate(env, dt, &lgi->lgi_fid);
+ if (IS_ERR(o))
+ RETURN(PTR_ERR(o));
+
+ goto after_open;
+ }
ls = ls_device_get(dt);
if (IS_ERR(ls))
RETURN(PTR_ERR(ls));
- cfs_mutex_lock(&ls->ls_los_mutex);
- los = dt_los_find(ls, FID_SEQ_LLOG);
- cfs_mutex_unlock(&ls->ls_los_mutex);
+ mutex_lock(&ls->ls_los_mutex);
+ los = dt_los_find(ls, name != NULL ? FID_SEQ_LLOG_NAME : FID_SEQ_LLOG);
+ mutex_unlock(&ls->ls_los_mutex);
LASSERT(los);
ls_device_put(env, ls);
GOTO(out, rc);
}
- o = ls_locate(env, ls, &lgi->lgi_fid);
+ o = ls_locate(env, ls, &lgi->lgi_fid, NULL);
if (IS_ERR(o))
GOTO(out_name, rc = PTR_ERR(o));
+after_open:
/* No new llog is expected but doesn't exist */
if (open_param != LLOG_OPEN_NEW && !dt_object_exists(o))
GOTO(out_put, rc = -ENOENT);
if (handle->lgh_name != NULL)
OBD_FREE(handle->lgh_name, strlen(name) + 1);
out:
- dt_los_put(los);
+ if (los != NULL)
+ dt_los_put(los);
RETURN(rc);
}
+/**
+ * Implementation of the llog_operations::lop_exist
+ *
+ * This function checks that llog exists on storage.
+ *
+ * \param[in] handle llog handle of the current llog
+ *
+ * \retval true if llog object exists and is not just destroyed
+ * \retval false if llog doesn't exist or just destroyed
+ */
static int llog_osd_exist(struct llog_handle *handle)
{
LASSERT(handle->lgh_obj);
!lu_object_is_dying(handle->lgh_obj->do_lu.lo_header));
}
+/**
+ * Get dir for regular fid log object
+ *
+ * Get directory for regular fid log object, and these regular fid log
+ * object will be inserted under this directory, to satisfy the FS
+ * consistency check, e2fsck etc.
+ *
+ * \param [in] env execution environment
+ * \param [in] dto llog object
+ *
+ * \retval pointer to the directory if it is found.
+ * \retval ERR_PTR(negative errno) if it fails.
+ */
+struct dt_object *llog_osd_get_regular_fid_dir(const struct lu_env *env,
+ struct dt_object *dto)
+{
+ struct llog_thread_info *lgi = llog_info(env);
+ struct seq_server_site *ss = dto->do_lu.lo_dev->ld_site->ld_seq_site;
+ struct lu_seq_range *range = &lgi->lgi_range;
+ struct lu_fid *dir_fid = &lgi->lgi_fid;
+ struct dt_object *dir;
+ int rc;
+ ENTRY;
+
+ fld_range_set_any(range);
+ LASSERT(ss != NULL);
+ rc = ss->ss_server_fld->lsf_seq_lookup(env, ss->ss_server_fld,
+ fid_seq(lu_object_fid(&dto->do_lu)), range);
+ if (rc < 0)
+ RETURN(ERR_PTR(rc));
+
+ lu_update_log_dir_fid(dir_fid, range->lsr_index);
+ dir = dt_locate(env, lu2dt_dev(dto->do_lu.lo_dev), dir_fid);
+ if (IS_ERR(dir))
+ RETURN(dir);
+
+ if (!dt_try_as_dir(env, dir)) {
+ lu_object_put(env, &dir->do_lu);
+ RETURN(ERR_PTR(-ENOTDIR));
+ }
+
+ RETURN(dir);
+}
+
+/**
+ * Add llog object with regular FID to name entry
+ *
+ * Add llog object with regular FID to name space, and each llog
+ * object on each MDT will be /update_log_dir/[seq:oid:ver],
+ * so to satisfy the namespace consistency check, e2fsck etc.
+ *
+ * \param [in] env execution environment
+ * \param [in] dto llog object
+ * \param [in] th thandle
+ * \param [in] declare if it is declare or execution
+ *
+ * \retval 0 if insertion succeeds.
+ * \retval negative errno if insertion fails.
+ */
+static int
+llog_osd_regular_fid_add_name_entry(const struct lu_env *env,
+ struct dt_object *dto,
+ struct thandle *th, bool declare)
+{
+ struct llog_thread_info *lgi = llog_info(env);
+ const struct lu_fid *fid = lu_object_fid(&dto->do_lu);
+ struct dt_insert_rec *rec = &lgi->lgi_dt_rec;
+ struct dt_object *dir;
+ char *name = lgi->lgi_name;
+ int rc;
+ ENTRY;
+
+ if (!fid_is_norm(fid))
+ RETURN(0);
+
+ dir = llog_osd_get_regular_fid_dir(env, dto);
+ if (IS_ERR(dir))
+ RETURN(PTR_ERR(dir));
+
+ rec->rec_fid = fid;
+ rec->rec_type = S_IFREG;
+ snprintf(name, sizeof(lgi->lgi_name), DFID, PFID(fid));
+ dt_write_lock(env, dir, 0);
+ if (declare) {
+ rc = dt_declare_insert(env, dir, (struct dt_rec *)rec,
+ (struct dt_key *)name, th);
+ } else {
+ rc = dt_insert(env, dir, (struct dt_rec *)rec,
+ (struct dt_key *)name, th, 1);
+ }
+ dt_write_unlock(env, dir);
+
+ lu_object_put(env, &dir->do_lu);
+ RETURN(rc);
+}
+
+
+/**
+ * Implementation of the llog_operations::lop_declare_create
+ *
+ * This function declares the llog create. It declares also name insert
+ * into llog directory in case of named llog.
+ *
+ * \param[in] env execution environment
+ * \param[in] res llog handle of the current llog
+ * \param[in] th current transaction handle
+ *
+ * \retval 0 on successful create declaration
+ * \retval negative value on error
+ */
static int llog_osd_declare_create(const struct lu_env *env,
struct llog_handle *res, struct thandle *th)
{
struct llog_thread_info *lgi = llog_info(env);
+ struct dt_insert_rec *rec = &lgi->lgi_dt_rec;
struct local_oid_storage *los;
struct dt_object *o;
int rc;
if (dt_object_exists(o))
RETURN(0);
+ if (res->lgh_ctxt->loc_flags & LLOG_CTXT_FLAG_NORMAL_FID) {
+ struct llog_thread_info *lgi = llog_info(env);
+
+ lgi->lgi_attr.la_valid = LA_MODE | LA_SIZE;
+ lgi->lgi_attr.la_size = 0;
+ lgi->lgi_attr.la_mode = S_IFREG | S_IRUGO | S_IWUSR;
+ lgi->lgi_dof.dof_type = dt_mode_to_dft(S_IFREG);
+
+ rc = dt_declare_create(env, o, &lgi->lgi_attr, NULL,
+ &lgi->lgi_dof, th);
+ if (rc < 0)
+ RETURN(rc);
+
+
+ rc = llog_osd_regular_fid_add_name_entry(env, o, th, true);
+
+ RETURN(rc);
+ }
los = res->private_data;
LASSERT(los);
if (rc)
RETURN(rc);
- rc = dt_declare_record_write(env, o, LLOG_CHUNK_SIZE, 0, th);
- if (rc)
- RETURN(rc);
+ /* do not declare header initialization here as it's declared
+ * in llog_osd_declare_write_rec() which is always called */
if (res->lgh_name) {
struct dt_object *llog_dir;
llog_dir = llog_osd_dir_get(env, res->lgh_ctxt);
if (IS_ERR(llog_dir))
RETURN(PTR_ERR(llog_dir));
- dt_declare_ref_add(env, o, th);
logid_to_fid(&res->lgh_id, &lgi->lgi_fid);
+ rec->rec_fid = &lgi->lgi_fid;
+ rec->rec_type = S_IFREG;
rc = dt_declare_insert(env, llog_dir,
- (struct dt_rec *)&lgi->lgi_fid,
+ (struct dt_rec *)rec,
(struct dt_key *)res->lgh_name, th);
lu_object_put(env, &llog_dir->do_lu);
if (rc)
RETURN(rc);
}
-/* This is a callback from the llog_* functions.
- * Assumes caller has already pushed us into the kernel context. */
+/**
+ * Implementation of the llog_operations::lop_create
+ *
+ * This function creates the llog according with llog_handle::lgh_obj
+ * and llog_handle::lgh_name.
+ *
+ * \param[in] env execution environment
+ * \param[in] res llog handle of the current llog
+ * \param[in] th current transaction handle
+ *
+ * \retval 0 on successful create
+ * \retval negative value on error
+ */
static int llog_osd_create(const struct lu_env *env, struct llog_handle *res,
struct thandle *th)
{
struct llog_thread_info *lgi = llog_info(env);
+ struct dt_insert_rec *rec = &lgi->lgi_dt_rec;
struct local_oid_storage *los;
struct dt_object *o;
int rc = 0;
if (dt_object_exists(o))
RETURN(-EEXIST);
+ if (res->lgh_ctxt->loc_flags & LLOG_CTXT_FLAG_NORMAL_FID) {
+ struct llog_thread_info *lgi = llog_info(env);
+
+ lgi->lgi_attr.la_valid = LA_MODE | LA_SIZE | LA_TYPE;
+ lgi->lgi_attr.la_size = 0;
+ lgi->lgi_attr.la_mode = S_IFREG | S_IRUGO | S_IWUSR;
+ lgi->lgi_dof.dof_type = dt_mode_to_dft(S_IFREG);
+
+ dt_write_lock(env, o, 0);
+ rc = dt_create(env, o, &lgi->lgi_attr, NULL,
+ &lgi->lgi_dof, th);
+ dt_write_unlock(env, o);
+ if (rc < 0)
+ RETURN(rc);
+
+ rc = llog_osd_regular_fid_add_name_entry(env, o, th, false);
+
+ RETURN(rc);
+ }
+
los = res->private_data;
LASSERT(los);
rc = llog_osd_create_new_object(env, los, o, th);
else
rc = -EEXIST;
- if (res->lgh_name)
- dt_ref_add(env, o, th);
+
dt_write_unlock(env, o);
if (rc)
RETURN(rc);
RETURN(PTR_ERR(llog_dir));
logid_to_fid(&res->lgh_id, &lgi->lgi_fid);
+ rec->rec_fid = &lgi->lgi_fid;
+ rec->rec_type = S_IFREG;
dt_read_lock(env, llog_dir, 0);
- rc = dt_insert(env, llog_dir,
- (struct dt_rec *)&lgi->lgi_fid,
+ rc = dt_insert(env, llog_dir, (struct dt_rec *)rec,
(struct dt_key *)res->lgh_name,
- th, BYPASS_CAPA, 1);
+ th, 1);
dt_read_unlock(env, llog_dir);
lu_object_put(env, &llog_dir->do_lu);
if (rc)
RETURN(rc);
}
+/**
+ * Implementation of the llog_operations::lop_close
+ *
+ * This function closes the llog. It just put llog object and referenced
+ * local storage.
+ *
+ * \param[in] env execution environment
+ * \param[in] handle llog handle of the current llog
+ *
+ * \retval 0 on successful llog close
+ * \retval negative value on error
+ */
static int llog_osd_close(const struct lu_env *env, struct llog_handle *handle)
{
struct local_oid_storage *los;
LASSERT(handle->lgh_obj);
- lu_object_put(env, &handle->lgh_obj->do_lu);
-
+ if (handle->lgh_ctxt->loc_flags & LLOG_CTXT_FLAG_NORMAL_FID) {
+ /* Remove the object from the cache, otherwise it may
+ * hold LOD being released during cleanup process */
+ lu_object_put_nocache(env, &handle->lgh_obj->do_lu);
+ LASSERT(handle->private_data == NULL);
+ RETURN(rc);
+ } else {
+ lu_object_put(env, &handle->lgh_obj->do_lu);
+ }
los = handle->private_data;
LASSERT(los);
dt_los_put(los);
RETURN(rc);
}
+/**
+ * delete llog object name entry
+ *
+ * Delete llog object (with regular FID) from name space (under
+ * update_log_dir).
+ *
+ * \param [in] env execution environment
+ * \param [in] dto llog object
+ * \param [in] th thandle
+ * \param [in] declare if it is declare or execution
+ *
+ * \retval 0 if deletion succeeds.
+ * \retval negative errno if deletion fails.
+ */
+static int
+llog_osd_regular_fid_del_name_entry(const struct lu_env *env,
+ struct dt_object *dto,
+ struct thandle *th, bool declare)
+{
+ struct llog_thread_info *lgi = llog_info(env);
+ const struct lu_fid *fid = lu_object_fid(&dto->do_lu);
+ struct dt_object *dir;
+ char *name = lgi->lgi_name;
+ int rc;
+ ENTRY;
+
+ if (!fid_is_norm(fid))
+ RETURN(0);
+
+ dir = llog_osd_get_regular_fid_dir(env, dto);
+ if (IS_ERR(dir))
+ RETURN(PTR_ERR(dir));
+
+ snprintf(name, sizeof(lgi->lgi_name), DFID, PFID(fid));
+ dt_write_lock(env, dir, 0);
+ if (declare) {
+ rc = dt_declare_delete(env, dir, (struct dt_key *)name,
+ th);
+ } else {
+ rc = dt_delete(env, dir, (struct dt_key *)name, th);
+ }
+ dt_write_unlock(env, dir);
+
+ lu_object_put(env, &dir->do_lu);
+ RETURN(rc);
+}
+
+
+/**
+ * Implementation of the llog_operations::lop_destroy
+ *
+ * This function destroys the llog and deletes also entry in the
+ * llog directory in case of named llog. Llog should be opened prior that.
+ * Destroy method is not part of external transaction and does everything
+ * inside.
+ *
+ * \param[in] env execution environment
+ * \param[in] loghandle llog handle of the current llog
+ *
+ * \retval 0 on successful destroy
+ * \retval negative value on error
+ */
static int llog_osd_destroy(const struct lu_env *env,
struct llog_handle *loghandle)
{
- struct llog_thread_info *lgi = llog_info(env);
struct llog_ctxt *ctxt;
struct dt_object *o, *llog_dir = NULL;
struct dt_device *d;
if (IS_ERR(llog_dir))
GOTO(out_trans, rc = PTR_ERR(llog_dir));
- dt_declare_ref_del(env, o, th);
name = loghandle->lgh_name;
rc = dt_declare_delete(env, llog_dir,
(struct dt_key *)name, th);
GOTO(out_trans, rc);
}
- dt_declare_ref_del(env, o, th);
+ rc = dt_declare_ref_del(env, o, th);
+ if (rc < 0)
+ GOTO(out_trans, rc);
rc = dt_declare_destroy(env, o, th);
if (rc)
GOTO(out_trans, rc);
+ if (loghandle->lgh_ctxt->loc_flags & LLOG_CTXT_FLAG_NORMAL_FID) {
+ rc = llog_osd_regular_fid_del_name_entry(env, o, th, true);
+ if (rc < 0)
+ GOTO(out_trans, rc);
+ }
+
rc = dt_trans_start_local(env, d, th);
if (rc)
GOTO(out_trans, rc);
+ th->th_wait_submit = 1;
+
dt_write_lock(env, o, 0);
if (dt_object_exists(o)) {
if (name) {
- dt_ref_del(env, o, th);
dt_read_lock(env, llog_dir, 0);
rc = dt_delete(env, llog_dir,
(struct dt_key *) name,
- th, BYPASS_CAPA);
+ th);
dt_read_unlock(env, llog_dir);
if (rc) {
CERROR("%s: can't remove llog %s: rc = %d\n",
GOTO(out_unlock, rc);
}
}
- /*
- * XXX: compatibility bits
- * on old filesystems llogs are referenced by the name
- * on the new ones they are referenced by OI and by
- * the name
- */
- rc = dt_attr_get(env, o, &lgi->lgi_attr, NULL);
- if (rc)
- GOTO(out_unlock, rc);
- LASSERT(lgi->lgi_attr.la_nlink < 2);
- if (lgi->lgi_attr.la_nlink == 1)
- dt_ref_del(env, o, th);
+ dt_ref_del(env, o, th);
rc = dt_destroy(env, o, th);
if (rc)
GOTO(out_unlock, rc);
+
+ if (loghandle->lgh_ctxt->loc_flags &
+ LLOG_CTXT_FLAG_NORMAL_FID) {
+ rc = llog_osd_regular_fid_del_name_entry(env, o, th,
+ false);
+ if (rc < 0)
+ GOTO(out_unlock, rc);
+ }
}
out_unlock:
dt_write_unlock(env, o);
out_trans:
dt_trans_stop(env, d, th);
- if (llog_dir != NULL)
+ if (!(IS_ERR_OR_NULL(llog_dir)))
lu_object_put(env, &llog_dir->do_lu);
RETURN(rc);
}
+/**
+ * Implementation of the llog_operations::lop_setup
+ *
+ * This function setup the llog on local storage.
+ *
+ * \param[in] env execution environment
+ * \param[in] obd obd device the llog belongs to
+ * \param[in] olg the llog group, it is always zero group now.
+ * \param[in] ctxt_idx the llog index, it defines the purpose of this llog.
+ * Every new llog type have to use own index.
+ * \param[in] disk_obd the storage obd, where llog is stored.
+ *
+ * \retval 0 on successful llog setup
+ * \retval negative value on error
+ */
static int llog_osd_setup(const struct lu_env *env, struct obd_device *obd,
struct obd_llog_group *olg, int ctxt_idx,
struct obd_device *disk_obd)
{
- struct local_oid_storage *los;
struct llog_thread_info *lgi = llog_info(env);
struct llog_ctxt *ctxt;
int rc = 0;
-
ENTRY;
LASSERT(obd);
ctxt = llog_ctxt_get(olg->olg_ctxts[ctxt_idx]);
LASSERT(ctxt);
+ if (disk_obd == NULL)
+ GOTO(out, rc = 0);
+
/* initialize data allowing to generate new fids,
* literally we need a sequece */
lgi->lgi_fid.f_seq = FID_SEQ_LLOG;
lgi->lgi_fid.f_oid = 1;
lgi->lgi_fid.f_ver = 0;
rc = local_oid_storage_init(env, disk_obd->obd_lvfs_ctxt.dt,
- &lgi->lgi_fid, &los);
+ &lgi->lgi_fid,
+ &ctxt->loc_los_nameless);
+ if (rc != 0)
+ GOTO(out, rc);
+
+ lgi->lgi_fid.f_seq = FID_SEQ_LLOG_NAME;
+ lgi->lgi_fid.f_oid = 1;
+ lgi->lgi_fid.f_ver = 0;
+ rc = local_oid_storage_init(env, disk_obd->obd_lvfs_ctxt.dt,
+ &lgi->lgi_fid,
+ &ctxt->loc_los_named);
+ if (rc != 0) {
+ local_oid_storage_fini(env, ctxt->loc_los_nameless);
+ ctxt->loc_los_nameless = NULL;
+ }
+
+ GOTO(out, rc);
+
+out:
llog_ctxt_put(ctxt);
return rc;
}
+/**
+ * Implementation of the llog_operations::lop_cleanup
+ *
+ * This function cleanups the llog on local storage.
+ *
+ * \param[in] env execution environment
+ * \param[in] ctxt the llog context
+ *
+ * \retval 0
+ */
static int llog_osd_cleanup(const struct lu_env *env, struct llog_ctxt *ctxt)
{
- struct dt_device *dt;
- struct ls_device *ls;
- struct local_oid_storage *los;
-
- LASSERT(ctxt->loc_exp->exp_obd);
- dt = ctxt->loc_exp->exp_obd->obd_lvfs_ctxt.dt;
- ls = ls_device_get(dt);
- if (IS_ERR(ls))
- RETURN(PTR_ERR(ls));
+ if (ctxt->loc_los_nameless != NULL) {
+ local_oid_storage_fini(env, ctxt->loc_los_nameless);
+ ctxt->loc_los_nameless = NULL;
+ }
- cfs_mutex_lock(&ls->ls_los_mutex);
- los = dt_los_find(ls, FID_SEQ_LLOG);
- cfs_mutex_unlock(&ls->ls_los_mutex);
- if (los != NULL) {
- dt_los_put(los);
- local_oid_storage_fini(env, los);
+ if (ctxt->loc_los_named != NULL) {
+ local_oid_storage_fini(env, ctxt->loc_los_named);
+ ctxt->loc_los_named = NULL;
}
- ls_device_put(env, ls);
+
return 0;
}
};
EXPORT_SYMBOL(llog_osd_ops);
-/* reads the catalog list */
+struct llog_operations llog_common_cat_ops = {
+ .lop_next_block = llog_osd_next_block,
+ .lop_prev_block = llog_osd_prev_block,
+ .lop_read_header = llog_osd_read_header,
+ .lop_destroy = llog_osd_destroy,
+ .lop_setup = llog_osd_setup,
+ .lop_cleanup = llog_osd_cleanup,
+ .lop_open = llog_osd_open,
+ .lop_exist = llog_osd_exist,
+ .lop_declare_create = llog_osd_declare_create,
+ .lop_create = llog_osd_create,
+ .lop_declare_write_rec = llog_osd_declare_write_rec,
+ .lop_write_rec = llog_osd_write_rec,
+ .lop_close = llog_osd_close,
+ .lop_add = llog_cat_add_rec,
+ .lop_declare_add = llog_cat_declare_add_rec,
+};
+EXPORT_SYMBOL(llog_common_cat_ops);
+
+/**
+ * Read the special file which contains the list of llog catalogs IDs
+ *
+ * This function reads the CATALOGS file which contains the array of llog
+ * catalogs IDs. The main purpose of this file is to store OSP llogs indexed
+ * by OST/MDT number.
+ *
+ * \param[in] env execution environment
+ * \param[in] d corresponding storage device
+ * \param[in] idx position to start from, usually OST/MDT index
+ * \param[in] count how many catalog IDs to read
+ * \param[out] idarray the buffer for the data. If it is NULL then
+ * function returns just number of catalog IDs
+ * in the file.
+ * \param[in] fid LLOG_CATALOGS_OID for CATALOG object
+ *
+ * \retval 0 on successful read of catalog IDs
+ * \retval negative value on error
+ * \retval positive value which is number of records in
+ * the file if \a idarray is NULL
+ */
int llog_osd_get_cat_list(const struct lu_env *env, struct dt_device *d,
- int idx, int count, struct llog_catid *idarray)
+ int idx, int count, struct llog_catid *idarray,
+ const struct lu_fid *fid)
{
struct llog_thread_info *lgi = llog_info(env);
struct dt_object *o = NULL;
size = sizeof(*idarray) * count;
lgi->lgi_off = idx * sizeof(*idarray);
- lu_local_obj_fid(&lgi->lgi_fid, LLOG_CATALOGS_OID);
+ lgi->lgi_fid = *fid;
o = dt_locate(env, d, &lgi->lgi_fid);
if (IS_ERR(o))
RETURN(PTR_ERR(o));
lgi->lgi_attr.la_mode = S_IFREG | S_IRUGO | S_IWUSR;
lgi->lgi_dof.dof_type = dt_mode_to_dft(S_IFREG);
+ th->th_wait_submit = 1;
+ /* Make the llog object creation synchronization, so
+ * it will be reliable to the reference, especially
+ * for remote reference */
+ th->th_sync = 1;
+
rc = dt_declare_create(env, o, &lgi->lgi_attr, NULL,
&lgi->lgi_dof, th);
if (rc)
GOTO(out, rc);
}
- rc = dt_attr_get(env, o, &lgi->lgi_attr, BYPASS_CAPA);
+ rc = dt_attr_get(env, o, &lgi->lgi_attr);
if (rc)
GOTO(out, rc);
/* read for new ost index or for empty file */
memset(idarray, 0, size);
- if (lgi->lgi_attr.la_size < lgi->lgi_off + size)
+ if (lgi->lgi_attr.la_size <= lgi->lgi_off)
GOTO(out, rc = 0);
if (lgi->lgi_attr.la_size < lgi->lgi_off + size)
size = lgi->lgi_attr.la_size - lgi->lgi_off;
lgi->lgi_buf.lb_buf = idarray;
lgi->lgi_buf.lb_len = size;
rc = dt_record_read(env, o, &lgi->lgi_buf, &lgi->lgi_off);
- if (rc) {
+ /* -EFAULT means the llog is a sparse file. This is not an error
+ * after arbitrary OST index is supported. */
+ if (rc < 0 && rc != -EFAULT) {
CERROR("%s: error reading CATALOGS: rc = %d\n",
o->do_lu.lo_dev->ld_obd->obd_name, rc);
GOTO(out, rc);
}
EXPORT_SYMBOL(llog_osd_get_cat_list);
-/* writes the cat list */
+/**
+ * Write the special file which contains the list of llog catalogs IDs
+ *
+ * This function writes the CATALOG file which contains the array of llog
+ * catalogs IDs. It is used mostly to store OSP llogs indexed by OST/MDT
+ * number.
+ *
+ * \param[in] env execution environment
+ * \param[in] d corresponding storage device
+ * \param[in] idx position to start from, usually OST/MDT index
+ * \param[in] count how many catalog IDs to write
+ * \param[out] idarray the buffer with the data to write.
+ * \param[in] fid LLOG_CATALOGS_OID for CATALOG object
+ *
+ * \retval 0 on successful write of catalog IDs
+ * \retval negative value on error
+ */
int llog_osd_put_cat_list(const struct lu_env *env, struct dt_device *d,
- int idx, int count, struct llog_catid *idarray)
+ int idx, int count, struct llog_catid *idarray,
+ const struct lu_fid *fid)
{
struct llog_thread_info *lgi = llog_info(env);
struct dt_object *o = NULL;
struct thandle *th;
int rc, size;
- if (!count)
+ if (count == 0)
RETURN(0);
LASSERT(d);
size = sizeof(*idarray) * count;
lgi->lgi_off = idx * sizeof(*idarray);
+ lgi->lgi_fid = *fid;
- lu_local_obj_fid(&lgi->lgi_fid, LLOG_CATALOGS_OID);
o = dt_locate(env, d, &lgi->lgi_fid);
if (IS_ERR(o))
RETURN(PTR_ERR(o));
if (!dt_object_exists(o))
GOTO(out, rc = -ENOENT);
- rc = dt_attr_get(env, o, &lgi->lgi_attr, BYPASS_CAPA);
+ rc = dt_attr_get(env, o, &lgi->lgi_attr);
if (rc)
GOTO(out, rc);
if (IS_ERR(th))
GOTO(out, rc = PTR_ERR(th));
- rc = dt_declare_record_write(env, o, size, lgi->lgi_off, th);
+ lgi->lgi_buf.lb_len = size;
+ lgi->lgi_buf.lb_buf = idarray;
+ rc = dt_declare_record_write(env, o, &lgi->lgi_buf, lgi->lgi_off, th);
if (rc)
GOTO(out, rc);
if (rc)
GOTO(out_trans, rc);
- lgi->lgi_buf.lb_buf = idarray;
- lgi->lgi_buf.lb_len = size;
+ th->th_wait_submit = 1;
+
rc = dt_record_write(env, o, &lgi->lgi_buf, &lgi->lgi_off, th);
if (rc)
- CDEBUG(D_INODE, "error writeing CATALOGS: rc = %d\n", rc);
+ CDEBUG(D_INODE, "can't write CATALOGS at index %d: rc = %d\n",
+ idx, rc);
out_trans:
dt_trans_stop(env, d, th);
out:
git://git.whamcloud.com / fs / lustre-release.git / blobdiff