| /* |
| * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
| * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
| * |
| * This copyrighted material is made available to anyone wishing to use, |
| * modify, copy, or redistribute it subject to the terms and conditions |
| * of the GNU General Public License version 2. |
| */ |
| |
| #include <linux/sched.h> |
| #include <linux/slab.h> |
| #include <linux/spinlock.h> |
| #include <linux/completion.h> |
| #include <linux/buffer_head.h> |
| #include <linux/gfs2_ondisk.h> |
| #include <linux/lm_interface.h> |
| |
| #include "gfs2.h" |
| #include "incore.h" |
| #include "inode.h" |
| #include "glock.h" |
| #include "log.h" |
| #include "lops.h" |
| #include "meta_io.h" |
| #include "recovery.h" |
| #include "rgrp.h" |
| #include "trans.h" |
| #include "util.h" |
| |
| /** |
| * gfs2_pin - Pin a buffer in memory |
| * @sdp: The superblock |
| * @bh: The buffer to be pinned |
| * |
| * The log lock must be held when calling this function |
| */ |
| static void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh) |
| { |
| struct gfs2_bufdata *bd; |
| |
| gfs2_assert_withdraw(sdp, test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)); |
| |
| clear_buffer_dirty(bh); |
| if (test_set_buffer_pinned(bh)) |
| gfs2_assert_withdraw(sdp, 0); |
| if (!buffer_uptodate(bh)) |
| gfs2_io_error_bh(sdp, bh); |
| bd = bh->b_private; |
| /* If this buffer is in the AIL and it has already been written |
| * to in-place disk block, remove it from the AIL. |
| */ |
| if (bd->bd_ail) |
| list_move(&bd->bd_ail_st_list, &bd->bd_ail->ai_ail2_list); |
| get_bh(bh); |
| } |
| |
| /** |
| * gfs2_unpin - Unpin a buffer |
| * @sdp: the filesystem the buffer belongs to |
| * @bh: The buffer to unpin |
| * @ai: |
| * |
| */ |
| |
| static void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh, |
| struct gfs2_ail *ai) |
| { |
| struct gfs2_bufdata *bd = bh->b_private; |
| |
| gfs2_assert_withdraw(sdp, buffer_uptodate(bh)); |
| |
| if (!buffer_pinned(bh)) |
| gfs2_assert_withdraw(sdp, 0); |
| |
| lock_buffer(bh); |
| mark_buffer_dirty(bh); |
| clear_buffer_pinned(bh); |
| |
| gfs2_log_lock(sdp); |
| if (bd->bd_ail) { |
| list_del(&bd->bd_ail_st_list); |
| brelse(bh); |
| } else { |
| struct gfs2_glock *gl = bd->bd_gl; |
| list_add(&bd->bd_ail_gl_list, &gl->gl_ail_list); |
| atomic_inc(&gl->gl_ail_count); |
| } |
| bd->bd_ail = ai; |
| list_add(&bd->bd_ail_st_list, &ai->ai_ail1_list); |
| gfs2_log_unlock(sdp); |
| unlock_buffer(bh); |
| } |
| |
| static void __glock_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) |
| { |
| struct gfs2_glock *gl; |
| struct gfs2_trans *tr = current->journal_info; |
| |
| tr->tr_touched = 1; |
| |
| gl = container_of(le, struct gfs2_glock, gl_le); |
| if (gfs2_assert_withdraw(sdp, gfs2_glock_is_held_excl(gl))) |
| return; |
| |
| if (!list_empty(&le->le_list)) |
| return; |
| |
| gfs2_glock_hold(gl); |
| set_bit(GLF_DIRTY, &gl->gl_flags); |
| sdp->sd_log_num_gl++; |
| list_add(&le->le_list, &sdp->sd_log_le_gl); |
| } |
| |
| static void glock_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) |
| { |
| gfs2_log_lock(sdp); |
| __glock_lo_add(sdp, le); |
| gfs2_log_unlock(sdp); |
| } |
| |
| static void glock_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) |
| { |
| struct list_head *head = &sdp->sd_log_le_gl; |
| struct gfs2_glock *gl; |
| |
| while (!list_empty(head)) { |
| gl = list_entry(head->next, struct gfs2_glock, gl_le.le_list); |
| list_del_init(&gl->gl_le.le_list); |
| sdp->sd_log_num_gl--; |
| |
| gfs2_assert_withdraw(sdp, gfs2_glock_is_held_excl(gl)); |
| gfs2_glock_put(gl); |
| } |
| gfs2_assert_warn(sdp, !sdp->sd_log_num_gl); |
| } |
| |
| static void buf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) |
| { |
| struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le); |
| struct gfs2_trans *tr; |
| |
| lock_buffer(bd->bd_bh); |
| gfs2_log_lock(sdp); |
| if (!list_empty(&bd->bd_list_tr)) |
| goto out; |
| tr = current->journal_info; |
| tr->tr_touched = 1; |
| tr->tr_num_buf++; |
| list_add(&bd->bd_list_tr, &tr->tr_list_buf); |
| if (!list_empty(&le->le_list)) |
| goto out; |
| __glock_lo_add(sdp, &bd->bd_gl->gl_le); |
| gfs2_meta_check(sdp, bd->bd_bh); |
| gfs2_pin(sdp, bd->bd_bh); |
| sdp->sd_log_num_buf++; |
| list_add(&le->le_list, &sdp->sd_log_le_buf); |
| tr->tr_num_buf_new++; |
| out: |
| gfs2_log_unlock(sdp); |
| unlock_buffer(bd->bd_bh); |
| } |
| |
| static void buf_lo_incore_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) |
| { |
| struct list_head *head = &tr->tr_list_buf; |
| struct gfs2_bufdata *bd; |
| |
| gfs2_log_lock(sdp); |
| while (!list_empty(head)) { |
| bd = list_entry(head->next, struct gfs2_bufdata, bd_list_tr); |
| list_del_init(&bd->bd_list_tr); |
| tr->tr_num_buf--; |
| } |
| gfs2_log_unlock(sdp); |
| gfs2_assert_warn(sdp, !tr->tr_num_buf); |
| } |
| |
| static void buf_lo_before_commit(struct gfs2_sbd *sdp) |
| { |
| struct buffer_head *bh; |
| struct gfs2_log_descriptor *ld; |
| struct gfs2_bufdata *bd1 = NULL, *bd2; |
| unsigned int total; |
| unsigned int offset = BUF_OFFSET; |
| unsigned int limit; |
| unsigned int num; |
| unsigned n; |
| __be64 *ptr; |
| |
| limit = buf_limit(sdp); |
| /* for 4k blocks, limit = 503 */ |
| |
| gfs2_log_lock(sdp); |
| total = sdp->sd_log_num_buf; |
| bd1 = bd2 = list_prepare_entry(bd1, &sdp->sd_log_le_buf, bd_le.le_list); |
| while(total) { |
| num = total; |
| if (total > limit) |
| num = limit; |
| gfs2_log_unlock(sdp); |
| bh = gfs2_log_get_buf(sdp); |
| gfs2_log_lock(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_be32(GFS2_METATYPE_LD); |
| ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD); |
| ld->ld_type = cpu_to_be32(GFS2_LOG_DESC_METADATA); |
| 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)); |
| |
| n = 0; |
| 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; |
| } |
| |
| gfs2_log_unlock(sdp); |
| set_buffer_dirty(bh); |
| ll_rw_block(WRITE, 1, &bh); |
| gfs2_log_lock(sdp); |
| |
| n = 0; |
| list_for_each_entry_continue(bd2, &sdp->sd_log_le_buf, |
| bd_le.le_list) { |
| gfs2_log_unlock(sdp); |
| bh = gfs2_log_fake_buf(sdp, bd2->bd_bh); |
| set_buffer_dirty(bh); |
| ll_rw_block(WRITE, 1, &bh); |
| gfs2_log_lock(sdp); |
| if (++n >= num) |
| break; |
| } |
| |
| BUG_ON(total < num); |
| total -= num; |
| } |
| gfs2_log_unlock(sdp); |
| } |
| |
| static void buf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) |
| { |
| struct list_head *head = &sdp->sd_log_le_buf; |
| struct gfs2_bufdata *bd; |
| |
| while (!list_empty(head)) { |
| bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); |
| list_del_init(&bd->bd_le.le_list); |
| sdp->sd_log_num_buf--; |
| |
| 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_host *head, int pass) |
| { |
| struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
| |
| if (pass != 0) |
| return; |
| |
| sdp->sd_found_blocks = 0; |
| sdp->sd_replayed_blocks = 0; |
| } |
| |
| static int buf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, |
| struct gfs2_log_descriptor *ld, __be64 *ptr, |
| int pass) |
| { |
| struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
| struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
| struct gfs2_glock *gl = ip->i_gl; |
| unsigned int blks = be32_to_cpu(ld->ld_data1); |
| struct buffer_head *bh_log, *bh_ip; |
| u64 blkno; |
| int error = 0; |
| |
| if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_METADATA) |
| return 0; |
| |
| gfs2_replay_incr_blk(sdp, &start); |
| |
| for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { |
| blkno = 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); |
| |
| if (gfs2_meta_check(sdp, bh_ip)) |
| error = -EIO; |
| else |
| mark_buffer_dirty(bh_ip); |
| |
| brelse(bh_log); |
| brelse(bh_ip); |
| |
| if (error) |
| break; |
| |
| sdp->sd_replayed_blocks++; |
| } |
| |
| return error; |
| } |
| |
| static void buf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) |
| { |
| struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
| struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
| |
| if (error) { |
| gfs2_meta_sync(ip->i_gl); |
| return; |
| } |
| if (pass != 1) |
| return; |
| |
| gfs2_meta_sync(ip->i_gl); |
| |
| fs_info(sdp, "jid=%u: Replayed %u of %u blocks\n", |
| jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks); |
| } |
| |
| static void revoke_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) |
| { |
| struct gfs2_trans *tr; |
| |
| tr = current->journal_info; |
| tr->tr_touched = 1; |
| tr->tr_num_revoke++; |
| |
| gfs2_log_lock(sdp); |
| sdp->sd_log_num_revoke++; |
| list_add(&le->le_list, &sdp->sd_log_le_revoke); |
| gfs2_log_unlock(sdp); |
| } |
| |
| static void revoke_lo_before_commit(struct gfs2_sbd *sdp) |
| { |
| struct gfs2_log_descriptor *ld; |
| struct gfs2_meta_header *mh; |
| struct buffer_head *bh; |
| unsigned int offset; |
| struct list_head *head = &sdp->sd_log_le_revoke; |
| struct gfs2_revoke *rv; |
| |
| if (!sdp->sd_log_num_revoke) |
| return; |
| |
| bh = gfs2_log_get_buf(sdp); |
| ld = (struct gfs2_log_descriptor *)bh->b_data; |
| ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC); |
| ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD); |
| ld->ld_header.mh_format = cpu_to_be32(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(u64))); |
| 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)); |
| offset = sizeof(struct gfs2_log_descriptor); |
| |
| while (!list_empty(head)) { |
| rv = list_entry(head->next, struct gfs2_revoke, rv_le.le_list); |
| list_del_init(&rv->rv_le.le_list); |
| sdp->sd_log_num_revoke--; |
| |
| if (offset + sizeof(u64) > sdp->sd_sb.sb_bsize) { |
| set_buffer_dirty(bh); |
| ll_rw_block(WRITE, 1, &bh); |
| |
| bh = gfs2_log_get_buf(sdp); |
| mh = (struct gfs2_meta_header *)bh->b_data; |
| mh->mh_magic = cpu_to_be32(GFS2_MAGIC); |
| mh->mh_type = cpu_to_be32(GFS2_METATYPE_LB); |
| mh->mh_format = cpu_to_be32(GFS2_FORMAT_LB); |
| offset = sizeof(struct gfs2_meta_header); |
| } |
| |
| *(__be64 *)(bh->b_data + offset) = cpu_to_be64(rv->rv_blkno); |
| kfree(rv); |
| |
| offset += sizeof(u64); |
| } |
| gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke); |
| |
| set_buffer_dirty(bh); |
| ll_rw_block(WRITE, 1, &bh); |
| } |
| |
| static void revoke_lo_before_scan(struct gfs2_jdesc *jd, |
| struct gfs2_log_header_host *head, int pass) |
| { |
| struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
| |
| if (pass != 0) |
| return; |
| |
| sdp->sd_found_revokes = 0; |
| sdp->sd_replay_tail = head->lh_tail; |
| } |
| |
| static int revoke_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, |
| struct gfs2_log_descriptor *ld, __be64 *ptr, |
| int pass) |
| { |
| struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
| unsigned int blks = be32_to_cpu(ld->ld_length); |
| unsigned int revokes = be32_to_cpu(ld->ld_data1); |
| struct buffer_head *bh; |
| unsigned int offset; |
| u64 blkno; |
| int first = 1; |
| int error; |
| |
| if (pass != 0 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_REVOKE) |
| return 0; |
| |
| offset = sizeof(struct gfs2_log_descriptor); |
| |
| for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { |
| error = gfs2_replay_read_block(jd, start, &bh); |
| if (error) |
| return error; |
| |
| if (!first) |
| gfs2_metatype_check(sdp, bh, GFS2_METATYPE_LB); |
| |
| while (offset + sizeof(u64) <= sdp->sd_sb.sb_bsize) { |
| blkno = be64_to_cpu(*(__be64 *)(bh->b_data + offset)); |
| |
| error = gfs2_revoke_add(sdp, blkno, start); |
| if (error < 0) |
| return error; |
| else if (error) |
| sdp->sd_found_revokes++; |
| |
| if (!--revokes) |
| break; |
| offset += sizeof(u64); |
| } |
| |
| brelse(bh); |
| offset = sizeof(struct gfs2_meta_header); |
| first = 0; |
| } |
| |
| return 0; |
| } |
| |
| static void revoke_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) |
| { |
| struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
| |
| if (error) { |
| gfs2_revoke_clean(sdp); |
| return; |
| } |
| if (pass != 1) |
| return; |
| |
| fs_info(sdp, "jid=%u: Found %u revoke tags\n", |
| jd->jd_jid, sdp->sd_found_revokes); |
| |
| gfs2_revoke_clean(sdp); |
| } |
| |
| static void rg_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) |
| { |
| struct gfs2_rgrpd *rgd; |
| struct gfs2_trans *tr = current->journal_info; |
| |
| tr->tr_touched = 1; |
| |
| rgd = container_of(le, struct gfs2_rgrpd, rd_le); |
| |
| gfs2_log_lock(sdp); |
| if (!list_empty(&le->le_list)){ |
| gfs2_log_unlock(sdp); |
| return; |
| } |
| gfs2_rgrp_bh_hold(rgd); |
| sdp->sd_log_num_rg++; |
| list_add(&le->le_list, &sdp->sd_log_le_rg); |
| gfs2_log_unlock(sdp); |
| } |
| |
| static void rg_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) |
| { |
| struct list_head *head = &sdp->sd_log_le_rg; |
| struct gfs2_rgrpd *rgd; |
| |
| while (!list_empty(head)) { |
| rgd = list_entry(head->next, struct gfs2_rgrpd, rd_le.le_list); |
| list_del_init(&rgd->rd_le.le_list); |
| sdp->sd_log_num_rg--; |
| |
| gfs2_rgrp_repolish_clones(rgd); |
| gfs2_rgrp_bh_put(rgd); |
| } |
| 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) |
| { |
| struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le); |
| struct gfs2_trans *tr = current->journal_info; |
| struct address_space *mapping = bd->bd_bh->b_page->mapping; |
| struct gfs2_inode *ip = GFS2_I(mapping->host); |
| |
| lock_buffer(bd->bd_bh); |
| gfs2_log_lock(sdp); |
| if (!list_empty(&bd->bd_list_tr)) |
| goto out; |
| tr->tr_touched = 1; |
| if (gfs2_is_jdata(ip)) { |
| tr->tr_num_buf++; |
| list_add(&bd->bd_list_tr, &tr->tr_list_buf); |
| } |
| if (!list_empty(&le->le_list)) |
| goto out; |
| |
| __glock_lo_add(sdp, &bd->bd_gl->gl_le); |
| if (gfs2_is_jdata(ip)) { |
| gfs2_pin(sdp, bd->bd_bh); |
| tr->tr_num_databuf_new++; |
| sdp->sd_log_num_jdata++; |
| } |
| sdp->sd_log_num_databuf++; |
| list_add(&le->le_list, &sdp->sd_log_le_databuf); |
| out: |
| gfs2_log_unlock(sdp); |
| unlock_buffer(bd->bd_bh); |
| } |
| |
| 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(kaddr, 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) |
| { |
| LIST_HEAD(started); |
| struct gfs2_bufdata *bd1 = NULL, *bd2, *bdt; |
| struct buffer_head *bh = NULL,*bh1 = NULL; |
| struct gfs2_log_descriptor *ld; |
| unsigned int limit; |
| unsigned int total_dbuf; |
| unsigned int total_jdata; |
| unsigned int num, n; |
| __be64 *ptr = NULL; |
| |
| limit = databuf_limit(sdp); |
| |
| /* |
| * Start writing ordered buffers, write journaled buffers |
| * into the log along with a header |
| */ |
| gfs2_log_lock(sdp); |
| total_dbuf = sdp->sd_log_num_databuf; |
| total_jdata = sdp->sd_log_num_jdata; |
| 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) { |
| /* store off the buffer head in a local ptr since |
| * gfs2_bufdata might change when we drop the log lock |
| */ |
| bh1 = bd1->bd_bh; |
| |
| /* An ordered write buffer */ |
| if (bh1 && !buffer_pinned(bh1)) { |
| 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 (bh1) { |
| if (buffer_dirty(bh1)) { |
| get_bh(bh1); |
| |
| gfs2_log_unlock(sdp); |
| |
| ll_rw_block(SWRITE, 1, &bh1); |
| brelse(bh1); |
| |
| gfs2_log_lock(sdp); |
| } |
| continue; |
| } |
| continue; |
| } else if (bh1) { /* 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 + |
| DATABUF_OFFSET); |
| ld->ld_header.mh_magic = |
| cpu_to_be32(GFS2_MAGIC); |
| ld->ld_header.mh_type = |
| cpu_to_be32(GFS2_METATYPE_LD); |
| ld->ld_header.mh_format = |
| cpu_to_be32(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(bh1); |
| *ptr++ = cpu_to_be64(bh1->b_blocknr); |
| *ptr++ = cpu_to_be64((__u64)magic); |
| clear_buffer_escaped(bh1); |
| if (unlikely(magic != 0)) |
| set_buffer_escaped(bh1); |
| gfs2_log_lock(sdp); |
| if (++n >= num) |
| break; |
| } else if (!bh1) { |
| total_dbuf--; |
| sdp->sd_log_num_databuf--; |
| list_del_init(&bd1->bd_le.le_list); |
| if (bd1 == bd2) { |
| bd2 = NULL; |
| bd2 = list_prepare_entry(bd2, |
| &sdp->sd_log_le_databuf, |
| bd_le.le_list); |
| } |
| kmem_cache_free(gfs2_bufdata_cachep, bd1); |
| } |
| } |
| gfs2_log_unlock(sdp); |
| if (bh) { |
| set_buffer_dirty(bh); |
| ll_rw_block(WRITE, 1, &bh); |
| bh = NULL; |
| ptr = 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 (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(kaddr, KM_USER0); |
| *(__be32 *)bh->b_data = 0; |
| } else { |
| bh = gfs2_log_fake_buf(sdp, bd2->bd_bh); |
| } |
| set_buffer_dirty(bh); |
| ll_rw_block(WRITE, 1, &bh); |
| gfs2_log_lock(sdp); |
| if (++n >= num) |
| break; |
| } |
| bh = NULL; |
| BUG_ON(total_dbuf < num); |
| total_dbuf -= num; |
| total_jdata -= num; |
| } |
| gfs2_log_unlock(sdp); |
| |
| /* Wait on all ordered buffers */ |
| while (!list_empty(&started)) { |
| gfs2_log_lock(sdp); |
| bd1 = list_entry(started.next, struct gfs2_bufdata, |
| bd_le.le_list); |
| list_del_init(&bd1->bd_le.le_list); |
| sdp->sd_log_num_databuf--; |
| bh = bd1->bd_bh; |
| if (bh) { |
| bh->b_private = NULL; |
| get_bh(bh); |
| gfs2_log_unlock(sdp); |
| wait_on_buffer(bh); |
| brelse(bh); |
| } else |
| gfs2_log_unlock(sdp); |
| |
| kmem_cache_free(gfs2_bufdata_cachep, 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_inode *ip = GFS2_I(jd->jd_inode); |
| struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
| struct gfs2_glock *gl = ip->i_gl; |
| unsigned int blks = be32_to_cpu(ld->ld_data1); |
| struct buffer_head *bh_log, *bh_ip; |
| u64 blkno; |
| u64 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_inode *ip = GFS2_I(jd->jd_inode); |
| struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
| |
| if (error) { |
| gfs2_meta_sync(ip->i_gl); |
| return; |
| } |
| if (pass != 1) |
| return; |
| |
| /* data sync? */ |
| gfs2_meta_sync(ip->i_gl); |
| |
| 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_init(&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); |
| } |
| |
| |
| const struct gfs2_log_operations gfs2_glock_lops = { |
| .lo_add = glock_lo_add, |
| .lo_after_commit = glock_lo_after_commit, |
| .lo_name = "glock", |
| }; |
| |
| const struct gfs2_log_operations gfs2_buf_lops = { |
| .lo_add = buf_lo_add, |
| .lo_incore_commit = buf_lo_incore_commit, |
| .lo_before_commit = buf_lo_before_commit, |
| .lo_after_commit = buf_lo_after_commit, |
| .lo_before_scan = buf_lo_before_scan, |
| .lo_scan_elements = buf_lo_scan_elements, |
| .lo_after_scan = buf_lo_after_scan, |
| .lo_name = "buf", |
| }; |
| |
| const struct gfs2_log_operations gfs2_revoke_lops = { |
| .lo_add = revoke_lo_add, |
| .lo_before_commit = revoke_lo_before_commit, |
| .lo_before_scan = revoke_lo_before_scan, |
| .lo_scan_elements = revoke_lo_scan_elements, |
| .lo_after_scan = revoke_lo_after_scan, |
| .lo_name = "revoke", |
| }; |
| |
| const struct gfs2_log_operations gfs2_rg_lops = { |
| .lo_add = rg_lo_add, |
| .lo_after_commit = rg_lo_after_commit, |
| .lo_name = "rg", |
| }; |
| |
| const 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", |
| }; |
| |
| const struct gfs2_log_operations *gfs2_log_ops[] = { |
| &gfs2_glock_lops, |
| &gfs2_buf_lops, |
| &gfs2_revoke_lops, |
| &gfs2_rg_lops, |
| &gfs2_databuf_lops, |
| NULL, |
| }; |
| |