gfs2_trans_add_gl(bd->bd_gl);
gfs2_meta_check(sdp, bd->bd_bh);
- gfs2_meta_pin(sdp, bd->bd_bh);
+ gfs2_pin(sdp, bd->bd_bh);
gfs2_log_lock(sdp);
sdp->sd_log_num_buf++;
memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved));
n = 0;
- list_for_each_entry_continue(bd1, &sdp->sd_log_le_buf, bd_le.le_list) {
+ list_for_each_entry_continue(bd1, &sdp->sd_log_le_buf,
+ bd_le.le_list) {
*ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr);
if (++n >= num)
break;
ll_rw_block(WRITE, 1, &bh);
n = 0;
- list_for_each_entry_continue(bd2, &sdp->sd_log_le_buf, bd_le.le_list) {
+ list_for_each_entry_continue(bd2, &sdp->sd_log_le_buf,
+ bd_le.le_list) {
bh = gfs2_log_fake_buf(sdp, bd2->bd_bh);
set_buffer_dirty(bh);
ll_rw_block(WRITE, 1, &bh);
list_del_init(&bd->bd_le.le_list);
sdp->sd_log_num_buf--;
- gfs2_meta_unpin(sdp, bd->bd_bh, ai);
+ gfs2_unpin(sdp, bd->bd_bh, ai);
}
gfs2_assert_warn(sdp, !sdp->sd_log_num_buf);
}
static void buf_lo_before_scan(struct gfs2_jdesc *jd,
struct gfs2_log_header *head, int pass)
{
- struct gfs2_sbd *sdp = jd->jd_inode->i_sbd;
+ struct gfs2_sbd *sdp = get_v2ip(jd->jd_inode)->i_sbd;
if (pass != 0)
return;
struct gfs2_log_descriptor *ld, __be64 *ptr,
int pass)
{
- struct gfs2_sbd *sdp = jd->jd_inode->i_sbd;
- struct gfs2_glock *gl = jd->jd_inode->i_gl;
+ struct gfs2_sbd *sdp = get_v2ip(jd->jd_inode)->i_sbd;
+ struct gfs2_glock *gl = get_v2ip(jd->jd_inode)->i_gl;
unsigned int blks = be32_to_cpu(ld->ld_data1);
struct buffer_head *bh_log, *bh_ip;
uint64_t blkno;
static void buf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass)
{
- struct gfs2_sbd *sdp = jd->jd_inode->i_sbd;
+ struct gfs2_sbd *sdp = get_v2ip(jd->jd_inode)->i_sbd;
if (error) {
- gfs2_meta_sync(jd->jd_inode->i_gl, DIO_START | DIO_WAIT);
+ gfs2_meta_sync(get_v2ip(jd->jd_inode)->i_gl,
+ DIO_START | DIO_WAIT);
return;
}
if (pass != 1)
return;
- gfs2_meta_sync(jd->jd_inode->i_gl, DIO_START | DIO_WAIT);
+ gfs2_meta_sync(get_v2ip(jd->jd_inode)->i_gl, DIO_START | DIO_WAIT);
fs_info(sdp, "jid=%u: Replayed %u of %u blocks\n",
jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks);
ld->ld_header.mh_type = cpu_to_be16(GFS2_METATYPE_LD);
ld->ld_header.mh_format = cpu_to_be16(GFS2_FORMAT_LD);
ld->ld_type = cpu_to_be32(GFS2_LOG_DESC_REVOKE);
- ld->ld_length = cpu_to_be32(gfs2_struct2blk(sdp, sdp->sd_log_num_revoke, sizeof(uint64_t)));
+ ld->ld_length = cpu_to_be32(gfs2_struct2blk(sdp, sdp->sd_log_num_revoke,
+ sizeof(uint64_t)));
ld->ld_data1 = cpu_to_be32(sdp->sd_log_num_revoke);
ld->ld_data2 = cpu_to_be32(0);
memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved));
while (!list_empty(head)) {
rv = list_entry(head->next, struct gfs2_revoke, rv_le.le_list);
- list_del(&rv->rv_le.le_list);
+ list_del_init(&rv->rv_le.le_list);
sdp->sd_log_num_revoke--;
if (offset + sizeof(uint64_t) > sdp->sd_sb.sb_bsize) {
static void revoke_lo_before_scan(struct gfs2_jdesc *jd,
struct gfs2_log_header *head, int pass)
{
- struct gfs2_sbd *sdp = jd->jd_inode->i_sbd;
+ struct gfs2_sbd *sdp = get_v2ip(jd->jd_inode)->i_sbd;
if (pass != 0)
return;
struct gfs2_log_descriptor *ld, __be64 *ptr,
int pass)
{
- struct gfs2_sbd *sdp = jd->jd_inode->i_sbd;
+ struct gfs2_sbd *sdp = get_v2ip(jd->jd_inode)->i_sbd;
unsigned int blks = be32_to_cpu(ld->ld_length);
unsigned int revokes = be32_to_cpu(ld->ld_data1);
struct buffer_head *bh;
static void revoke_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass)
{
- struct gfs2_sbd *sdp = jd->jd_inode->i_sbd;
+ struct gfs2_sbd *sdp = get_v2ip(jd->jd_inode)->i_sbd;
if (error) {
gfs2_revoke_clean(sdp);
gfs2_assert_warn(sdp, !sdp->sd_log_num_rg);
}
+/**
+ * databuf_lo_add - Add a databuf to the transaction.
+ *
+ * This is used in two distinct cases:
+ * i) In ordered write mode
+ * We put the data buffer on a list so that we can ensure that its
+ * synced to disk at the right time
+ * ii) In journaled data mode
+ * We need to journal the data block in the same way as metadata in
+ * the functions above. The difference is that here we have a tag
+ * which is two __be64's being the block number (as per meta data)
+ * and a flag which says whether the data block needs escaping or
+ * not. This means we need a new log entry for each 251 or so data
+ * blocks, which isn't an enormous overhead but twice as much as
+ * for normal metadata blocks.
+ */
static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
{
- get_transaction->tr_touched = 1;
+ struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le);
+ struct gfs2_trans *tr = get_transaction;
+ struct address_space *mapping = bd->bd_bh->b_page->mapping;
+ struct gfs2_inode *ip = get_v2ip(mapping->host);
+ tr->tr_touched = 1;
+ if (!list_empty(&bd->bd_list_tr) &&
+ (ip->i_di.di_flags & GFS2_DIF_JDATA)) {
+ tr->tr_num_buf++;
+ gfs2_trans_add_gl(bd->bd_gl);
+ list_add(&bd->bd_list_tr, &tr->tr_list_buf);
+ gfs2_pin(sdp, bd->bd_bh);
+ }
gfs2_log_lock(sdp);
- sdp->sd_log_num_databuf++;
- list_add(&le->le_list, &sdp->sd_log_le_databuf);
+ if (!list_empty(&le->le_list)) {
+ if (ip->i_di.di_flags & GFS2_DIF_JDATA)
+ sdp->sd_log_num_jdata++;
+ sdp->sd_log_num_databuf++;
+ list_add(&le->le_list, &sdp->sd_log_le_databuf);
+ }
gfs2_log_unlock(sdp);
}
+static int gfs2_check_magic(struct buffer_head *bh)
+{
+ struct page *page = bh->b_page;
+ void *kaddr;
+ __be32 *ptr;
+ int rv = 0;
+
+ kaddr = kmap_atomic(page, KM_USER0);
+ ptr = kaddr + bh_offset(bh);
+ if (*ptr == cpu_to_be32(GFS2_MAGIC))
+ rv = 1;
+ kunmap_atomic(page, KM_USER0);
+
+ return rv;
+}
+
+/**
+ * databuf_lo_before_commit - Scan the data buffers, writing as we go
+ *
+ * Here we scan through the lists of buffers and make the assumption
+ * that any buffer thats been pinned is being journaled, and that
+ * any unpinned buffer is an ordered write data buffer and therefore
+ * will be written back rather than journaled.
+ */
static void databuf_lo_before_commit(struct gfs2_sbd *sdp)
{
- struct list_head *head = &sdp->sd_log_le_databuf;
LIST_HEAD(started);
- struct gfs2_databuf *db;
- struct buffer_head *bh;
+ struct gfs2_bufdata *bd1 = NULL, *bd2, *bdt;
+ struct buffer_head *bh = NULL;
+ unsigned int offset = sizeof(struct gfs2_log_descriptor);
+ struct gfs2_log_descriptor *ld;
+ unsigned int limit;
+ unsigned int total_dbuf = sdp->sd_log_num_databuf;
+ unsigned int total_jdata = sdp->sd_log_num_jdata;
+ unsigned int num, n;
+ __be64 *ptr = NULL;
- while (!list_empty(head)) {
- db = list_entry(head->prev, struct gfs2_databuf, db_le.le_list);
- list_move(&db->db_le.le_list, &started);
+ offset += (2*sizeof(__be64) - 1);
+ offset &= ~(2*sizeof(__be64) - 1);
+ limit = (sdp->sd_sb.sb_bsize - offset)/sizeof(__be64);
- gfs2_log_lock(sdp);
- bh = db->db_bh;
+ /*
+ * Start writing ordered buffers, write journaled buffers
+ * into the log along with a header
+ */
+ gfs2_log_lock(sdp);
+ bd2 = bd1 = list_prepare_entry(bd1, &sdp->sd_log_le_databuf,
+ bd_le.le_list);
+ while(total_dbuf) {
+ num = total_jdata;
+ if (num > limit)
+ num = limit;
+ n = 0;
+ list_for_each_entry_safe_continue(bd1, bdt,
+ &sdp->sd_log_le_databuf,
+ bd_le.le_list) {
+ /* An ordered write buffer */
+ if (bd1->bd_bh && !buffer_pinned(bd1->bd_bh)) {
+ list_move(&bd1->bd_le.le_list, &started);
+ if (bd1 == bd2) {
+ bd2 = NULL;
+ bd2 = list_prepare_entry(bd2,
+ &sdp->sd_log_le_databuf,
+ bd_le.le_list);
+ }
+ total_dbuf--;
+ if (bd1->bd_bh) {
+ get_bh(bd1->bd_bh);
+ if (buffer_dirty(bd1->bd_bh)) {
+ gfs2_log_unlock(sdp);
+ wait_on_buffer(bd1->bd_bh);
+ ll_rw_block(WRITE, 1,
+ &bd1->bd_bh);
+ gfs2_log_lock(sdp);
+ }
+ brelse(bd1->bd_bh);
+ continue;
+ }
+ continue;
+ } else if (bd1->bd_bh) { /* A journaled buffer */
+ int magic;
+ gfs2_log_unlock(sdp);
+ if (!bh) {
+ bh = gfs2_log_get_buf(sdp);
+ ld = (struct gfs2_log_descriptor *)
+ bh->b_data;
+ ptr = (__be64 *)(bh->b_data + offset);
+ ld->ld_header.mh_magic =
+ cpu_to_be32(GFS2_MAGIC);
+ ld->ld_header.mh_type =
+ cpu_to_be16(GFS2_METATYPE_LD);
+ ld->ld_header.mh_format =
+ cpu_to_be16(GFS2_FORMAT_LD);
+ ld->ld_type =
+ cpu_to_be32(GFS2_LOG_DESC_JDATA);
+ ld->ld_length = cpu_to_be32(num + 1);
+ ld->ld_data1 = cpu_to_be32(num);
+ ld->ld_data2 = cpu_to_be32(0);
+ memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved));
+ }
+ magic = gfs2_check_magic(bd1->bd_bh);
+ *ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr);
+ *ptr++ = cpu_to_be64((__u64)magic);
+ clear_buffer_escaped(bd1->bd_bh);
+ if (unlikely(magic != 0))
+ set_buffer_escaped(bd1->bd_bh);
+ gfs2_log_lock(sdp);
+ if (n++ > num)
+ break;
+ }
+ }
+ gfs2_log_unlock(sdp);
if (bh) {
- get_bh(bh);
+ set_buffer_dirty(bh);
+ ll_rw_block(WRITE, 1, &bh);
+ bh = NULL;
+ }
+ n = 0;
+ gfs2_log_lock(sdp);
+ list_for_each_entry_continue(bd2, &sdp->sd_log_le_databuf,
+ bd_le.le_list) {
+ if (!bd2->bd_bh)
+ continue;
+ /* copy buffer if it needs escaping */
gfs2_log_unlock(sdp);
- if (buffer_dirty(bh)) {
- wait_on_buffer(bh);
- ll_rw_block(WRITE, 1, &bh);
+ if (unlikely(buffer_escaped(bd2->bd_bh))) {
+ void *kaddr;
+ struct page *page = bd2->bd_bh->b_page;
+ bh = gfs2_log_get_buf(sdp);
+ kaddr = kmap_atomic(page, KM_USER0);
+ memcpy(bh->b_data,
+ kaddr + bh_offset(bd2->bd_bh),
+ sdp->sd_sb.sb_bsize);
+ kunmap_atomic(page, KM_USER0);
+ *(__be32 *)bh->b_data = 0;
+ } else {
+ bh = gfs2_log_fake_buf(sdp, bd2->bd_bh);
}
- brelse(bh);
- } else
- gfs2_log_unlock(sdp);
+ set_buffer_dirty(bh);
+ ll_rw_block(WRITE, 1, &bh);
+ gfs2_log_lock(sdp);
+ if (++n >= num)
+ break;
+ }
+ bh = NULL;
+ total_dbuf -= num;
+ total_jdata -= num;
}
+ gfs2_log_unlock(sdp);
+ /* Wait on all ordered buffers */
while (!list_empty(&started)) {
- db = list_entry(started.next, struct gfs2_databuf,
- db_le.le_list);
- list_del(&db->db_le.le_list);
+ gfs2_log_lock(sdp);
+ bd1 = list_entry(started.next, struct gfs2_bufdata,
+ bd_le.le_list);
+ list_del(&bd1->bd_le.le_list);
sdp->sd_log_num_databuf--;
- gfs2_log_lock(sdp);
- bh = db->db_bh;
+ bh = bd1->bd_bh;
if (bh) {
- set_v2db(bh, NULL);
+ set_v2bd(bh, NULL);
gfs2_log_unlock(sdp);
wait_on_buffer(bh);
brelse(bh);
} else
gfs2_log_unlock(sdp);
- kfree(db);
+ kfree(bd1);
+ }
+
+ /* We've removed all the ordered write bufs here, so only jdata left */
+ gfs2_assert_warn(sdp, sdp->sd_log_num_databuf == sdp->sd_log_num_jdata);
+}
+
+static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
+ struct gfs2_log_descriptor *ld,
+ __be64 *ptr, int pass)
+{
+ struct gfs2_sbd *sdp = get_v2ip(jd->jd_inode)->i_sbd;
+ struct gfs2_glock *gl = get_v2ip(jd->jd_inode)->i_gl;
+ unsigned int blks = be32_to_cpu(ld->ld_data1);
+ struct buffer_head *bh_log, *bh_ip;
+ uint64_t blkno;
+ uint64_t esc;
+ int error = 0;
+
+ if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_JDATA)
+ return 0;
+
+ gfs2_replay_incr_blk(sdp, &start);
+ for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) {
+ blkno = be64_to_cpu(*ptr++);
+ esc = be64_to_cpu(*ptr++);
+
+ sdp->sd_found_blocks++;
+
+ if (gfs2_revoke_check(sdp, blkno, start))
+ continue;
+
+ error = gfs2_replay_read_block(jd, start, &bh_log);
+ if (error)
+ return error;
+
+ bh_ip = gfs2_meta_new(gl, blkno);
+ memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size);
+
+ /* Unescape */
+ if (esc) {
+ __be32 *eptr = (__be32 *)bh_ip->b_data;
+ *eptr = cpu_to_be32(GFS2_MAGIC);
+ }
+ mark_buffer_dirty(bh_ip);
+
+ brelse(bh_log);
+ brelse(bh_ip);
+ if (error)
+ break;
+
+ sdp->sd_replayed_blocks++;
}
+ return error;
+}
+
+/* FIXME: sort out accounting for log blocks etc. */
+
+static void databuf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass)
+{
+ struct gfs2_sbd *sdp = get_v2ip(jd->jd_inode)->i_sbd;
+
+ if (error) {
+ gfs2_meta_sync(get_v2ip(jd->jd_inode)->i_gl,
+ DIO_START | DIO_WAIT);
+ return;
+ }
+ if (pass != 1)
+ return;
+
+ /* data sync? */
+ gfs2_meta_sync(get_v2ip(jd->jd_inode)->i_gl, DIO_START | DIO_WAIT);
+
+ fs_info(sdp, "jid=%u: Replayed %u of %u data blocks\n",
+ jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks);
+}
+
+static void databuf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
+{
+ struct list_head *head = &sdp->sd_log_le_databuf;
+ struct gfs2_bufdata *bd;
+
+ while (!list_empty(head)) {
+ bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list);
+ list_del(&bd->bd_le.le_list);
+ sdp->sd_log_num_databuf--;
+ sdp->sd_log_num_jdata--;
+ gfs2_unpin(sdp, bd->bd_bh, ai);
+ }
gfs2_assert_warn(sdp, !sdp->sd_log_num_databuf);
+ gfs2_assert_warn(sdp, !sdp->sd_log_num_jdata);
}
+
struct gfs2_log_operations gfs2_glock_lops = {
.lo_add = glock_lo_add,
.lo_after_commit = glock_lo_after_commit,
struct gfs2_log_operations gfs2_databuf_lops = {
.lo_add = databuf_lo_add,
+ .lo_incore_commit = buf_lo_incore_commit,
.lo_before_commit = databuf_lo_before_commit,
+ .lo_after_commit = databuf_lo_after_commit,
+ .lo_scan_elements = databuf_lo_scan_elements,
+ .lo_after_scan = databuf_lo_after_scan,
.lo_name = "databuf"
};
git.openpandora.org / pandora-kernel.git / blobdiff