diff options
Diffstat (limited to 'fs/gfs2/lops.c')
| -rw-r--r-- | fs/gfs2/lops.c | 809 |
1 files changed, 809 insertions, 0 deletions
diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c new file mode 100644 index 00000000000..881e337b6a7 --- /dev/null +++ b/fs/gfs2/lops.c @@ -0,0 +1,809 @@ +/* + * 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 "glock.h" +#include "log.h" +#include "lops.h" +#include "meta_io.h" +#include "recovery.h" +#include "rgrp.h" +#include "trans.h" +#include "util.h" + +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; + + if (!list_empty(&le->le_list)) + return; + + gl = container_of(le, struct gfs2_glock, gl_le); + if (gfs2_assert_withdraw(sdp, gfs2_glock_is_held_excl(gl))) + return; + gfs2_glock_hold(gl); + set_bit(GLF_DIRTY, &gl->gl_flags); + + gfs2_log_lock(sdp); + sdp->sd_log_num_gl++; + list_add(&le->le_list, &sdp->sd_log_le_gl); + 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; + + if (!list_empty(&bd->bd_list_tr)) + return; + + 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)) + return; + + gfs2_trans_add_gl(bd->bd_gl); + + gfs2_meta_check(sdp, bd->bd_bh); + gfs2_pin(sdp, bd->bd_bh); + + gfs2_log_lock(sdp); + sdp->sd_log_num_buf++; + list_add(&le->le_list, &sdp->sd_log_le_buf); + gfs2_log_unlock(sdp); + + tr->tr_num_buf_new++; +} + +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; + + 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_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 = sdp->sd_log_num_buf; + unsigned int offset = sizeof(struct gfs2_log_descriptor); + unsigned int limit; + unsigned int num; + unsigned n; + __be64 *ptr; + + offset += sizeof(__be64) - 1; + offset &= ~(sizeof(__be64) - 1); + limit = (sdp->sd_sb.sb_bsize - offset)/sizeof(__be64); + /* for 4k blocks, limit = 503 */ + + bd1 = bd2 = list_prepare_entry(bd1, &sdp->sd_log_le_buf, bd_le.le_list); + while(total) { + num = total; + if (total > limit) + num = limit; + bh = gfs2_log_get_buf(sdp); + sdp->sd_log_num_hdrs++; + 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; + } + + set_buffer_dirty(bh); + ll_rw_block(WRITE, 1, &bh); + + n = 0; + 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); + if (++n >= num) + break; + } + + total -= num; + } +} + +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 *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 *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; + + if (!list_empty(&le->le_list)) + return; + + rgd = container_of(le, struct gfs2_rgrpd, rd_le); + gfs2_rgrp_bh_hold(rgd); + + gfs2_log_lock(sdp); + 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); + + tr->tr_touched = 1; + if (list_empty(&bd->bd_list_tr) && + (ip->i_di.di_flags & GFS2_DIF_JDATA)) { + tr->tr_num_buf++; + list_add(&bd->bd_list_tr, &tr->tr_list_buf); + gfs2_pin(sdp, bd->bd_bh); + tr->tr_num_buf_new++; + } + gfs2_trans_add_gl(bd->bd_gl); + gfs2_log_lock(sdp); + 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) +{ + LIST_HEAD(started); + 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; + + offset += 2*sizeof(__be64) - 1; + offset &= ~(2*sizeof(__be64) - 1); + limit = (sdp->sd_sb.sb_bsize - offset)/sizeof(__be64); + + /* + * 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); + sdp->sd_log_num_hdrs++; + 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_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; + } else if (!bd1->bd_bh) { + 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; + } + 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(page, 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; + 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, +}; + |