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author | David Teigland <teigland@redhat.com> | 2006-01-16 16:50:04 +0000 |
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committer | Steven Whitehouse <swhiteho@redhat.com> | 2006-01-16 16:50:04 +0000 |
commit | b3b94faa5fe5968827ba0640ee9fba4b3e7f736e (patch) | |
tree | 70bd6068b050d2c46e338484f8b03fae4365c6c3 /fs/gfs2/lops.c | |
parent | f7825dcf8c7301cfd3724eb40c5b443cc85ab7b8 (diff) | |
download | linux-stable-b3b94faa5fe5968827ba0640ee9fba4b3e7f736e.tar.gz linux-stable-b3b94faa5fe5968827ba0640ee9fba4b3e7f736e.tar.bz2 linux-stable-b3b94faa5fe5968827ba0640ee9fba4b3e7f736e.zip |
[GFS2] The core of GFS2
This patch contains all the core files for GFS2.
Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/lops.c')
-rw-r--r-- | fs/gfs2/lops.c | 534 |
1 files changed, 534 insertions, 0 deletions
diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c new file mode 100644 index 000000000000..d501e8224ed0 --- /dev/null +++ b/fs/gfs2/lops.c @@ -0,0 +1,534 @@ +/* + * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. + * Copyright (C) 2004-2005 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 v.2. + */ + +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/spinlock.h> +#include <linux/completion.h> +#include <linux/buffer_head.h> +#include <asm/semaphore.h> + +#include "gfs2.h" +#include "glock.h" +#include "log.h" +#include "lops.h" +#include "meta_io.h" +#include "recovery.h" +#include "rgrp.h" +#include "trans.h" + +static void glock_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) +{ + struct gfs2_glock *gl; + + get_transaction->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 = get_transaction; + 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_meta_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); + 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_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_meta_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; + + 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_sbd *sdp = jd->jd_inode->i_sbd; + struct gfs2_glock *gl = jd->jd_inode->i_gl; + unsigned int blks = be32_to_cpu(ld->ld_data1); + struct buffer_head *bh_log, *bh_ip; + uint64_t 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_sbd *sdp = jd->jd_inode->i_sbd; + + if (error) { + gfs2_meta_sync(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); + + 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 = get_transaction; + 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_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_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(&rv->rv_le.le_list); + sdp->sd_log_num_revoke--; + + if (offset + sizeof(uint64_t) > 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_be16(GFS2_METATYPE_LB); + mh->mh_format = cpu_to_be16(GFS2_FORMAT_LB); + offset = sizeof(struct gfs2_meta_header); + } + + *(__be64 *)(bh->b_data + offset) = cpu_to_be64(rv->rv_blkno); + kfree(rv); + + offset += sizeof(uint64_t); + } + 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 = jd->jd_inode->i_sbd; + + 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 = 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; + unsigned int offset; + uint64_t 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(uint64_t) <= 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(uint64_t); + } + + 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 = jd->jd_inode->i_sbd; + + 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; + + get_transaction->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); +} + +static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) +{ + get_transaction->tr_touched = 1; + + gfs2_log_lock(sdp); + sdp->sd_log_num_databuf++; + list_add(&le->le_list, &sdp->sd_log_le_databuf); + gfs2_log_unlock(sdp); +} + +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; + + while (!list_empty(head)) { + db = list_entry(head->prev, struct gfs2_databuf, db_le.le_list); + list_move(&db->db_le.le_list, &started); + + gfs2_log_lock(sdp); + bh = db->db_bh; + if (bh) { + get_bh(bh); + gfs2_log_unlock(sdp); + if (buffer_dirty(bh)) { + wait_on_buffer(bh); + ll_rw_block(WRITE, 1, &bh); + } + brelse(bh); + } else + gfs2_log_unlock(sdp); + } + + while (!list_empty(&started)) { + db = list_entry(started.next, struct gfs2_databuf, + db_le.le_list); + list_del(&db->db_le.le_list); + sdp->sd_log_num_databuf--; + + gfs2_log_lock(sdp); + bh = db->db_bh; + if (bh) { + set_v2db(bh, NULL); + gfs2_log_unlock(sdp); + wait_on_buffer(bh); + brelse(bh); + } else + gfs2_log_unlock(sdp); + + kfree(db); + } + + gfs2_assert_warn(sdp, !sdp->sd_log_num_databuf); +} + +struct gfs2_log_operations gfs2_glock_lops = { + .lo_add = glock_lo_add, + .lo_after_commit = glock_lo_after_commit, + .lo_name = "glock" +}; + +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" +}; + +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" +}; + +struct gfs2_log_operations gfs2_rg_lops = { + .lo_add = rg_lo_add, + .lo_after_commit = rg_lo_after_commit, + .lo_name = "rg" +}; + +struct gfs2_log_operations gfs2_databuf_lops = { + .lo_add = databuf_lo_add, + .lo_before_commit = databuf_lo_before_commit, + .lo_name = "databuf" +}; + +struct gfs2_log_operations *gfs2_log_ops[] = { + &gfs2_glock_lops, + &gfs2_buf_lops, + &gfs2_revoke_lops, + &gfs2_rg_lops, + &gfs2_databuf_lops, + NULL +}; + |