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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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![Linus Torvalds](/assets/img/avatar_default.png)
- Fix an accounting bug that made NR_FILE_DIRTY grow without limit when running xfstests - Convert more of mpage to use folios - Remove add_to_page_cache() and add_to_page_cache_locked() - Convert find_get_pages_range() to filemap_get_folios() - Improvements to the read_cache_page() family of functions - Remove a few unnecessary checks of PageError - Some straightforward filesystem conversions to use folios - Split PageMovable users out from address_space_operations into their own movable_operations - Convert aops->migratepage to aops->migrate_folio - Remove nobh support (Christoph Hellwig) -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEejHryeLBw/spnjHrDpNsjXcpgj4FAmLpViQACgkQDpNsjXcp gj5pBgf/f3+K7Hi3qw7aYQCYJQ7IA/bLyE/DLWI59kuiao6wDSve40B9YH9X++Ha mRLp55bkQS+bwS2xa4jlqrIDJzAfNoWlXaXZHUXGL1C/52ChTF6jaH2cvO9PVlDS 7fLv1hy2LwiIdzpKJkUW7T+kcQGj3QLKqtQ4x8zD0LGMg055yvt/qndHSUi41nWT /58+6W8Sk4vvRgkpeChFzF1lGLy00+FGT8y5V2kM9uRliFQ7XPCwqB2a3e5jbW6z C1NXQmRnopCrnOT1TFIhK3DyX6MDIWV5qcikNAmCKFb9fQFPmjDLPt9iSoMGjw2M Z+UVhJCaU3ISccd0DG5Ra/vzs9/O9Q== =DgUi -----END PGP SIGNATURE----- Merge tag 'folio-6.0' of git://git.infradead.org/users/willy/pagecache Pull folio updates from Matthew Wilcox: - Fix an accounting bug that made NR_FILE_DIRTY grow without limit when running xfstests - Convert more of mpage to use folios - Remove add_to_page_cache() and add_to_page_cache_locked() - Convert find_get_pages_range() to filemap_get_folios() - Improvements to the read_cache_page() family of functions - Remove a few unnecessary checks of PageError - Some straightforward filesystem conversions to use folios - Split PageMovable users out from address_space_operations into their own movable_operations - Convert aops->migratepage to aops->migrate_folio - Remove nobh support (Christoph Hellwig) * tag 'folio-6.0' of git://git.infradead.org/users/willy/pagecache: (78 commits) fs: remove the NULL get_block case in mpage_writepages fs: don't call ->writepage from __mpage_writepage fs: remove the nobh helpers jfs: stop using the nobh helper ext2: remove nobh support ntfs3: refactor ntfs_writepages mm/folio-compat: Remove migration compatibility functions fs: Remove aops->migratepage() secretmem: Convert to migrate_folio hugetlb: Convert to migrate_folio aio: Convert to migrate_folio f2fs: Convert to filemap_migrate_folio() ubifs: Convert to filemap_migrate_folio() btrfs: Convert btrfs_migratepage to migrate_folio mm/migrate: Add filemap_migrate_folio() mm/migrate: Convert migrate_page() to migrate_folio() nfs: Convert to migrate_folio btrfs: Convert btree_migratepage to migrate_folio mm/migrate: Convert expected_page_refs() to folio_expected_refs() mm/migrate: Convert buffer_migrate_page() to buffer_migrate_folio() ...
1130 lines
28 KiB
C
1130 lines
28 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
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*/
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/completion.h>
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#include <linux/buffer_head.h>
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#include <linux/mempool.h>
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#include <linux/gfs2_ondisk.h>
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#include <linux/bio.h>
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#include <linux/fs.h>
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#include <linux/list_sort.h>
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#include <linux/blkdev.h>
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#include "bmap.h"
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#include "dir.h"
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#include "gfs2.h"
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#include "incore.h"
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#include "inode.h"
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#include "glock.h"
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#include "glops.h"
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#include "log.h"
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#include "lops.h"
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#include "meta_io.h"
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#include "recovery.h"
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#include "rgrp.h"
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#include "trans.h"
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#include "util.h"
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#include "trace_gfs2.h"
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/**
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* gfs2_pin - Pin a buffer in memory
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* @sdp: The superblock
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* @bh: The buffer to be pinned
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*
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* The log lock must be held when calling this function
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*/
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void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh)
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{
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struct gfs2_bufdata *bd;
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BUG_ON(!current->journal_info);
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clear_buffer_dirty(bh);
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if (test_set_buffer_pinned(bh))
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gfs2_assert_withdraw(sdp, 0);
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if (!buffer_uptodate(bh))
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gfs2_io_error_bh_wd(sdp, bh);
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bd = bh->b_private;
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/* If this buffer is in the AIL and it has already been written
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* to in-place disk block, remove it from the AIL.
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*/
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spin_lock(&sdp->sd_ail_lock);
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if (bd->bd_tr)
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list_move(&bd->bd_ail_st_list, &bd->bd_tr->tr_ail2_list);
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spin_unlock(&sdp->sd_ail_lock);
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get_bh(bh);
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atomic_inc(&sdp->sd_log_pinned);
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trace_gfs2_pin(bd, 1);
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}
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static bool buffer_is_rgrp(const struct gfs2_bufdata *bd)
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{
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return bd->bd_gl->gl_name.ln_type == LM_TYPE_RGRP;
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}
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static void maybe_release_space(struct gfs2_bufdata *bd)
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{
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struct gfs2_glock *gl = bd->bd_gl;
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struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
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struct gfs2_rgrpd *rgd = gfs2_glock2rgrp(gl);
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unsigned int index = bd->bd_bh->b_blocknr - gl->gl_name.ln_number;
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struct gfs2_bitmap *bi = rgd->rd_bits + index;
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rgrp_lock_local(rgd);
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if (bi->bi_clone == NULL)
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goto out;
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if (sdp->sd_args.ar_discard)
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gfs2_rgrp_send_discards(sdp, rgd->rd_data0, bd->bd_bh, bi, 1, NULL);
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memcpy(bi->bi_clone + bi->bi_offset,
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bd->bd_bh->b_data + bi->bi_offset, bi->bi_bytes);
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clear_bit(GBF_FULL, &bi->bi_flags);
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rgd->rd_free_clone = rgd->rd_free;
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BUG_ON(rgd->rd_free_clone < rgd->rd_reserved);
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rgd->rd_extfail_pt = rgd->rd_free;
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out:
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rgrp_unlock_local(rgd);
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}
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/**
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* gfs2_unpin - Unpin a buffer
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* @sdp: the filesystem the buffer belongs to
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* @bh: The buffer to unpin
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* @tr: The system transaction being flushed
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*/
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static void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh,
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struct gfs2_trans *tr)
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{
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struct gfs2_bufdata *bd = bh->b_private;
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BUG_ON(!buffer_uptodate(bh));
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BUG_ON(!buffer_pinned(bh));
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lock_buffer(bh);
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mark_buffer_dirty(bh);
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clear_buffer_pinned(bh);
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if (buffer_is_rgrp(bd))
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maybe_release_space(bd);
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spin_lock(&sdp->sd_ail_lock);
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if (bd->bd_tr) {
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list_del(&bd->bd_ail_st_list);
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brelse(bh);
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} else {
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struct gfs2_glock *gl = bd->bd_gl;
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list_add(&bd->bd_ail_gl_list, &gl->gl_ail_list);
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atomic_inc(&gl->gl_ail_count);
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}
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bd->bd_tr = tr;
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list_add(&bd->bd_ail_st_list, &tr->tr_ail1_list);
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spin_unlock(&sdp->sd_ail_lock);
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clear_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
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trace_gfs2_pin(bd, 0);
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unlock_buffer(bh);
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atomic_dec(&sdp->sd_log_pinned);
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}
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void gfs2_log_incr_head(struct gfs2_sbd *sdp)
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{
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BUG_ON((sdp->sd_log_flush_head == sdp->sd_log_tail) &&
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(sdp->sd_log_flush_head != sdp->sd_log_head));
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if (++sdp->sd_log_flush_head == sdp->sd_jdesc->jd_blocks)
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sdp->sd_log_flush_head = 0;
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}
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u64 gfs2_log_bmap(struct gfs2_jdesc *jd, unsigned int lblock)
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{
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struct gfs2_journal_extent *je;
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list_for_each_entry(je, &jd->extent_list, list) {
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if (lblock >= je->lblock && lblock < je->lblock + je->blocks)
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return je->dblock + lblock - je->lblock;
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}
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return -1;
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}
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/**
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* gfs2_end_log_write_bh - end log write of pagecache data with buffers
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* @sdp: The superblock
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* @bvec: The bio_vec
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* @error: The i/o status
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*
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* This finds the relevant buffers and unlocks them and sets the
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* error flag according to the status of the i/o request. This is
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* used when the log is writing data which has an in-place version
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* that is pinned in the pagecache.
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*/
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static void gfs2_end_log_write_bh(struct gfs2_sbd *sdp,
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struct bio_vec *bvec,
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blk_status_t error)
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{
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struct buffer_head *bh, *next;
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struct page *page = bvec->bv_page;
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unsigned size;
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bh = page_buffers(page);
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size = bvec->bv_len;
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while (bh_offset(bh) < bvec->bv_offset)
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bh = bh->b_this_page;
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do {
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if (error)
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mark_buffer_write_io_error(bh);
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unlock_buffer(bh);
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next = bh->b_this_page;
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size -= bh->b_size;
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brelse(bh);
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bh = next;
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} while(bh && size);
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}
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/**
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* gfs2_end_log_write - end of i/o to the log
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* @bio: The bio
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*
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* Each bio_vec contains either data from the pagecache or data
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* relating to the log itself. Here we iterate over the bio_vec
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* array, processing both kinds of data.
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*
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*/
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static void gfs2_end_log_write(struct bio *bio)
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{
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struct gfs2_sbd *sdp = bio->bi_private;
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struct bio_vec *bvec;
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struct page *page;
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struct bvec_iter_all iter_all;
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if (bio->bi_status) {
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if (!cmpxchg(&sdp->sd_log_error, 0, (int)bio->bi_status))
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fs_err(sdp, "Error %d writing to journal, jid=%u\n",
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bio->bi_status, sdp->sd_jdesc->jd_jid);
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gfs2_withdraw_delayed(sdp);
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/* prevent more writes to the journal */
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clear_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags);
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wake_up(&sdp->sd_logd_waitq);
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}
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bio_for_each_segment_all(bvec, bio, iter_all) {
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page = bvec->bv_page;
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if (page_has_buffers(page))
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gfs2_end_log_write_bh(sdp, bvec, bio->bi_status);
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else
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mempool_free(page, gfs2_page_pool);
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}
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bio_put(bio);
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if (atomic_dec_and_test(&sdp->sd_log_in_flight))
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wake_up(&sdp->sd_log_flush_wait);
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}
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/**
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* gfs2_log_submit_bio - Submit any pending log bio
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* @biop: Address of the bio pointer
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* @opf: REQ_OP | op_flags
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*
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* Submit any pending part-built or full bio to the block device. If
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* there is no pending bio, then this is a no-op.
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*/
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void gfs2_log_submit_bio(struct bio **biop, blk_opf_t opf)
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{
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struct bio *bio = *biop;
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if (bio) {
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struct gfs2_sbd *sdp = bio->bi_private;
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atomic_inc(&sdp->sd_log_in_flight);
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bio->bi_opf = opf;
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submit_bio(bio);
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*biop = NULL;
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}
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}
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/**
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* gfs2_log_alloc_bio - Allocate a bio
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* @sdp: The super block
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* @blkno: The device block number we want to write to
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* @end_io: The bi_end_io callback
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*
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* Allocate a new bio, initialize it with the given parameters and return it.
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*
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* Returns: The newly allocated bio
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*/
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static struct bio *gfs2_log_alloc_bio(struct gfs2_sbd *sdp, u64 blkno,
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bio_end_io_t *end_io)
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{
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struct super_block *sb = sdp->sd_vfs;
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struct bio *bio = bio_alloc(sb->s_bdev, BIO_MAX_VECS, 0, GFP_NOIO);
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bio->bi_iter.bi_sector = blkno << sdp->sd_fsb2bb_shift;
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bio->bi_end_io = end_io;
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bio->bi_private = sdp;
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return bio;
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}
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/**
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* gfs2_log_get_bio - Get cached log bio, or allocate a new one
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* @sdp: The super block
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* @blkno: The device block number we want to write to
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* @biop: The bio to get or allocate
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* @op: REQ_OP
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* @end_io: The bi_end_io callback
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* @flush: Always flush the current bio and allocate a new one?
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*
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* If there is a cached bio, then if the next block number is sequential
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* with the previous one, return it, otherwise flush the bio to the
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* device. If there is no cached bio, or we just flushed it, then
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* allocate a new one.
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*
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* Returns: The bio to use for log writes
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*/
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static struct bio *gfs2_log_get_bio(struct gfs2_sbd *sdp, u64 blkno,
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struct bio **biop, enum req_op op,
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bio_end_io_t *end_io, bool flush)
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{
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struct bio *bio = *biop;
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if (bio) {
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u64 nblk;
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nblk = bio_end_sector(bio);
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nblk >>= sdp->sd_fsb2bb_shift;
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if (blkno == nblk && !flush)
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return bio;
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gfs2_log_submit_bio(biop, op);
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}
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*biop = gfs2_log_alloc_bio(sdp, blkno, end_io);
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return *biop;
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}
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/**
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* gfs2_log_write - write to log
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* @sdp: the filesystem
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* @jd: The journal descriptor
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* @page: the page to write
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* @size: the size of the data to write
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* @offset: the offset within the page
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* @blkno: block number of the log entry
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*
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* Try and add the page segment to the current bio. If that fails,
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* submit the current bio to the device and create a new one, and
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* then add the page segment to that.
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*/
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void gfs2_log_write(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd,
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struct page *page, unsigned size, unsigned offset,
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u64 blkno)
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{
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struct bio *bio;
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int ret;
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bio = gfs2_log_get_bio(sdp, blkno, &jd->jd_log_bio, REQ_OP_WRITE,
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gfs2_end_log_write, false);
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ret = bio_add_page(bio, page, size, offset);
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if (ret == 0) {
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bio = gfs2_log_get_bio(sdp, blkno, &jd->jd_log_bio,
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REQ_OP_WRITE, gfs2_end_log_write, true);
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ret = bio_add_page(bio, page, size, offset);
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WARN_ON(ret == 0);
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}
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}
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/**
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* gfs2_log_write_bh - write a buffer's content to the log
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* @sdp: The super block
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* @bh: The buffer pointing to the in-place location
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*
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* This writes the content of the buffer to the next available location
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* in the log. The buffer will be unlocked once the i/o to the log has
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* completed.
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*/
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static void gfs2_log_write_bh(struct gfs2_sbd *sdp, struct buffer_head *bh)
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{
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u64 dblock;
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dblock = gfs2_log_bmap(sdp->sd_jdesc, sdp->sd_log_flush_head);
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gfs2_log_incr_head(sdp);
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gfs2_log_write(sdp, sdp->sd_jdesc, bh->b_page, bh->b_size,
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bh_offset(bh), dblock);
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}
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/**
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* gfs2_log_write_page - write one block stored in a page, into the log
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* @sdp: The superblock
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* @page: The struct page
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*
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* This writes the first block-sized part of the page into the log. Note
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* that the page must have been allocated from the gfs2_page_pool mempool
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* and that after this has been called, ownership has been transferred and
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* the page may be freed at any time.
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*/
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static void gfs2_log_write_page(struct gfs2_sbd *sdp, struct page *page)
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{
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struct super_block *sb = sdp->sd_vfs;
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u64 dblock;
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dblock = gfs2_log_bmap(sdp->sd_jdesc, sdp->sd_log_flush_head);
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gfs2_log_incr_head(sdp);
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gfs2_log_write(sdp, sdp->sd_jdesc, page, sb->s_blocksize, 0, dblock);
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}
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/**
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* gfs2_end_log_read - end I/O callback for reads from the log
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* @bio: The bio
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*
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* Simply unlock the pages in the bio. The main thread will wait on them and
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* process them in order as necessary.
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*/
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|
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static void gfs2_end_log_read(struct bio *bio)
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{
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struct page *page;
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struct bio_vec *bvec;
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struct bvec_iter_all iter_all;
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bio_for_each_segment_all(bvec, bio, iter_all) {
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page = bvec->bv_page;
|
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if (bio->bi_status) {
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int err = blk_status_to_errno(bio->bi_status);
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|
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SetPageError(page);
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mapping_set_error(page->mapping, err);
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}
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unlock_page(page);
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}
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|
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bio_put(bio);
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}
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|
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/**
|
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* gfs2_jhead_pg_srch - Look for the journal head in a given page.
|
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* @jd: The journal descriptor
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* @head: The journal head to start from
|
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* @page: The page to look in
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*
|
|
* Returns: 1 if found, 0 otherwise.
|
|
*/
|
|
|
|
static bool gfs2_jhead_pg_srch(struct gfs2_jdesc *jd,
|
|
struct gfs2_log_header_host *head,
|
|
struct page *page)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
|
|
struct gfs2_log_header_host lh;
|
|
void *kaddr = kmap_atomic(page);
|
|
unsigned int offset;
|
|
bool ret = false;
|
|
|
|
for (offset = 0; offset < PAGE_SIZE; offset += sdp->sd_sb.sb_bsize) {
|
|
if (!__get_log_header(sdp, kaddr + offset, 0, &lh)) {
|
|
if (lh.lh_sequence >= head->lh_sequence)
|
|
*head = lh;
|
|
else {
|
|
ret = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
kunmap_atomic(kaddr);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* gfs2_jhead_process_page - Search/cleanup a page
|
|
* @jd: The journal descriptor
|
|
* @index: Index of the page to look into
|
|
* @head: The journal head to start from
|
|
* @done: If set, perform only cleanup, else search and set if found.
|
|
*
|
|
* Find the folio with 'index' in the journal's mapping. Search the folio for
|
|
* the journal head if requested (cleanup == false). Release refs on the
|
|
* folio so the page cache can reclaim it. We grabbed a
|
|
* reference on this folio twice, first when we did a find_or_create_page()
|
|
* to obtain the folio to add it to the bio and second when we do a
|
|
* filemap_get_folio() here to get the folio to wait on while I/O on it is being
|
|
* completed.
|
|
* This function is also used to free up a folio we might've grabbed but not
|
|
* used. Maybe we added it to a bio, but not submitted it for I/O. Or we
|
|
* submitted the I/O, but we already found the jhead so we only need to drop
|
|
* our references to the folio.
|
|
*/
|
|
|
|
static void gfs2_jhead_process_page(struct gfs2_jdesc *jd, unsigned long index,
|
|
struct gfs2_log_header_host *head,
|
|
bool *done)
|
|
{
|
|
struct folio *folio;
|
|
|
|
folio = filemap_get_folio(jd->jd_inode->i_mapping, index);
|
|
|
|
folio_wait_locked(folio);
|
|
if (folio_test_error(folio))
|
|
*done = true;
|
|
|
|
if (!*done)
|
|
*done = gfs2_jhead_pg_srch(jd, head, &folio->page);
|
|
|
|
/* filemap_get_folio() and the earlier find_or_create_page() */
|
|
folio_put_refs(folio, 2);
|
|
}
|
|
|
|
static struct bio *gfs2_chain_bio(struct bio *prev, unsigned int nr_iovecs)
|
|
{
|
|
struct bio *new;
|
|
|
|
new = bio_alloc(prev->bi_bdev, nr_iovecs, prev->bi_opf, GFP_NOIO);
|
|
bio_clone_blkg_association(new, prev);
|
|
new->bi_iter.bi_sector = bio_end_sector(prev);
|
|
bio_chain(new, prev);
|
|
submit_bio(prev);
|
|
return new;
|
|
}
|
|
|
|
/**
|
|
* gfs2_find_jhead - find the head of a log
|
|
* @jd: The journal descriptor
|
|
* @head: The log descriptor for the head of the log is returned here
|
|
* @keep_cache: If set inode pages will not be truncated
|
|
*
|
|
* Do a search of a journal by reading it in large chunks using bios and find
|
|
* the valid log entry with the highest sequence number. (i.e. the log head)
|
|
*
|
|
* Returns: 0 on success, errno otherwise
|
|
*/
|
|
int gfs2_find_jhead(struct gfs2_jdesc *jd, struct gfs2_log_header_host *head,
|
|
bool keep_cache)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
|
|
struct address_space *mapping = jd->jd_inode->i_mapping;
|
|
unsigned int block = 0, blocks_submitted = 0, blocks_read = 0;
|
|
unsigned int bsize = sdp->sd_sb.sb_bsize, off;
|
|
unsigned int bsize_shift = sdp->sd_sb.sb_bsize_shift;
|
|
unsigned int shift = PAGE_SHIFT - bsize_shift;
|
|
unsigned int max_blocks = 2 * 1024 * 1024 >> bsize_shift;
|
|
struct gfs2_journal_extent *je;
|
|
int sz, ret = 0;
|
|
struct bio *bio = NULL;
|
|
struct page *page = NULL;
|
|
bool done = false;
|
|
errseq_t since;
|
|
|
|
memset(head, 0, sizeof(*head));
|
|
if (list_empty(&jd->extent_list))
|
|
gfs2_map_journal_extents(sdp, jd);
|
|
|
|
since = filemap_sample_wb_err(mapping);
|
|
list_for_each_entry(je, &jd->extent_list, list) {
|
|
u64 dblock = je->dblock;
|
|
|
|
for (; block < je->lblock + je->blocks; block++, dblock++) {
|
|
if (!page) {
|
|
page = find_or_create_page(mapping,
|
|
block >> shift, GFP_NOFS);
|
|
if (!page) {
|
|
ret = -ENOMEM;
|
|
done = true;
|
|
goto out;
|
|
}
|
|
off = 0;
|
|
}
|
|
|
|
if (bio && (off || block < blocks_submitted + max_blocks)) {
|
|
sector_t sector = dblock << sdp->sd_fsb2bb_shift;
|
|
|
|
if (bio_end_sector(bio) == sector) {
|
|
sz = bio_add_page(bio, page, bsize, off);
|
|
if (sz == bsize)
|
|
goto block_added;
|
|
}
|
|
if (off) {
|
|
unsigned int blocks =
|
|
(PAGE_SIZE - off) >> bsize_shift;
|
|
|
|
bio = gfs2_chain_bio(bio, blocks);
|
|
goto add_block_to_new_bio;
|
|
}
|
|
}
|
|
|
|
if (bio) {
|
|
blocks_submitted = block;
|
|
submit_bio(bio);
|
|
}
|
|
|
|
bio = gfs2_log_alloc_bio(sdp, dblock, gfs2_end_log_read);
|
|
bio->bi_opf = REQ_OP_READ;
|
|
add_block_to_new_bio:
|
|
sz = bio_add_page(bio, page, bsize, off);
|
|
BUG_ON(sz != bsize);
|
|
block_added:
|
|
off += bsize;
|
|
if (off == PAGE_SIZE)
|
|
page = NULL;
|
|
if (blocks_submitted <= blocks_read + max_blocks) {
|
|
/* Keep at least one bio in flight */
|
|
continue;
|
|
}
|
|
|
|
gfs2_jhead_process_page(jd, blocks_read >> shift, head, &done);
|
|
blocks_read += PAGE_SIZE >> bsize_shift;
|
|
if (done)
|
|
goto out; /* found */
|
|
}
|
|
}
|
|
|
|
out:
|
|
if (bio)
|
|
submit_bio(bio);
|
|
while (blocks_read < block) {
|
|
gfs2_jhead_process_page(jd, blocks_read >> shift, head, &done);
|
|
blocks_read += PAGE_SIZE >> bsize_shift;
|
|
}
|
|
|
|
if (!ret)
|
|
ret = filemap_check_wb_err(mapping, since);
|
|
|
|
if (!keep_cache)
|
|
truncate_inode_pages(mapping, 0);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct page *gfs2_get_log_desc(struct gfs2_sbd *sdp, u32 ld_type,
|
|
u32 ld_length, u32 ld_data1)
|
|
{
|
|
struct page *page = mempool_alloc(gfs2_page_pool, GFP_NOIO);
|
|
struct gfs2_log_descriptor *ld = page_address(page);
|
|
clear_page(ld);
|
|
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(ld_type);
|
|
ld->ld_length = cpu_to_be32(ld_length);
|
|
ld->ld_data1 = cpu_to_be32(ld_data1);
|
|
ld->ld_data2 = 0;
|
|
return page;
|
|
}
|
|
|
|
static void gfs2_check_magic(struct buffer_head *bh)
|
|
{
|
|
void *kaddr;
|
|
__be32 *ptr;
|
|
|
|
clear_buffer_escaped(bh);
|
|
kaddr = kmap_atomic(bh->b_page);
|
|
ptr = kaddr + bh_offset(bh);
|
|
if (*ptr == cpu_to_be32(GFS2_MAGIC))
|
|
set_buffer_escaped(bh);
|
|
kunmap_atomic(kaddr);
|
|
}
|
|
|
|
static int blocknr_cmp(void *priv, const struct list_head *a,
|
|
const struct list_head *b)
|
|
{
|
|
struct gfs2_bufdata *bda, *bdb;
|
|
|
|
bda = list_entry(a, struct gfs2_bufdata, bd_list);
|
|
bdb = list_entry(b, struct gfs2_bufdata, bd_list);
|
|
|
|
if (bda->bd_bh->b_blocknr < bdb->bd_bh->b_blocknr)
|
|
return -1;
|
|
if (bda->bd_bh->b_blocknr > bdb->bd_bh->b_blocknr)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static void gfs2_before_commit(struct gfs2_sbd *sdp, unsigned int limit,
|
|
unsigned int total, struct list_head *blist,
|
|
bool is_databuf)
|
|
{
|
|
struct gfs2_log_descriptor *ld;
|
|
struct gfs2_bufdata *bd1 = NULL, *bd2;
|
|
struct page *page;
|
|
unsigned int num;
|
|
unsigned n;
|
|
__be64 *ptr;
|
|
|
|
gfs2_log_lock(sdp);
|
|
list_sort(NULL, blist, blocknr_cmp);
|
|
bd1 = bd2 = list_prepare_entry(bd1, blist, bd_list);
|
|
while(total) {
|
|
num = total;
|
|
if (total > limit)
|
|
num = limit;
|
|
gfs2_log_unlock(sdp);
|
|
page = gfs2_get_log_desc(sdp,
|
|
is_databuf ? GFS2_LOG_DESC_JDATA :
|
|
GFS2_LOG_DESC_METADATA, num + 1, num);
|
|
ld = page_address(page);
|
|
gfs2_log_lock(sdp);
|
|
ptr = (__be64 *)(ld + 1);
|
|
|
|
n = 0;
|
|
list_for_each_entry_continue(bd1, blist, bd_list) {
|
|
*ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr);
|
|
if (is_databuf) {
|
|
gfs2_check_magic(bd1->bd_bh);
|
|
*ptr++ = cpu_to_be64(buffer_escaped(bd1->bd_bh) ? 1 : 0);
|
|
}
|
|
if (++n >= num)
|
|
break;
|
|
}
|
|
|
|
gfs2_log_unlock(sdp);
|
|
gfs2_log_write_page(sdp, page);
|
|
gfs2_log_lock(sdp);
|
|
|
|
n = 0;
|
|
list_for_each_entry_continue(bd2, blist, bd_list) {
|
|
get_bh(bd2->bd_bh);
|
|
gfs2_log_unlock(sdp);
|
|
lock_buffer(bd2->bd_bh);
|
|
|
|
if (buffer_escaped(bd2->bd_bh)) {
|
|
void *kaddr;
|
|
page = mempool_alloc(gfs2_page_pool, GFP_NOIO);
|
|
ptr = page_address(page);
|
|
kaddr = kmap_atomic(bd2->bd_bh->b_page);
|
|
memcpy(ptr, kaddr + bh_offset(bd2->bd_bh),
|
|
bd2->bd_bh->b_size);
|
|
kunmap_atomic(kaddr);
|
|
*(__be32 *)ptr = 0;
|
|
clear_buffer_escaped(bd2->bd_bh);
|
|
unlock_buffer(bd2->bd_bh);
|
|
brelse(bd2->bd_bh);
|
|
gfs2_log_write_page(sdp, page);
|
|
} else {
|
|
gfs2_log_write_bh(sdp, bd2->bd_bh);
|
|
}
|
|
gfs2_log_lock(sdp);
|
|
if (++n >= num)
|
|
break;
|
|
}
|
|
|
|
BUG_ON(total < num);
|
|
total -= num;
|
|
}
|
|
gfs2_log_unlock(sdp);
|
|
}
|
|
|
|
static void buf_lo_before_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
|
|
{
|
|
unsigned int limit = buf_limit(sdp); /* 503 for 4k blocks */
|
|
unsigned int nbuf;
|
|
if (tr == NULL)
|
|
return;
|
|
nbuf = tr->tr_num_buf_new - tr->tr_num_buf_rm;
|
|
gfs2_before_commit(sdp, limit, nbuf, &tr->tr_buf, 0);
|
|
}
|
|
|
|
static void buf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
|
|
{
|
|
struct list_head *head;
|
|
struct gfs2_bufdata *bd;
|
|
|
|
if (tr == NULL)
|
|
return;
|
|
|
|
head = &tr->tr_buf;
|
|
while (!list_empty(head)) {
|
|
bd = list_first_entry(head, struct gfs2_bufdata, bd_list);
|
|
list_del_init(&bd->bd_list);
|
|
gfs2_unpin(sdp, bd->bd_bh, tr);
|
|
}
|
|
}
|
|
|
|
static void buf_lo_before_scan(struct gfs2_jdesc *jd,
|
|
struct gfs2_log_header_host *head, int pass)
|
|
{
|
|
if (pass != 0)
|
|
return;
|
|
|
|
jd->jd_found_blocks = 0;
|
|
jd->jd_replayed_blocks = 0;
|
|
}
|
|
|
|
#define obsolete_rgrp_replay \
|
|
"Replaying 0x%llx from jid=%d/0x%llx but we already have a bh!\n"
|
|
#define obsolete_rgrp_replay2 \
|
|
"busy:%d, pinned:%d rg_gen:0x%llx, j_gen:0x%llx\n"
|
|
|
|
static void obsolete_rgrp(struct gfs2_jdesc *jd, struct buffer_head *bh_log,
|
|
u64 blkno)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
|
|
struct gfs2_rgrpd *rgd;
|
|
struct gfs2_rgrp *jrgd = (struct gfs2_rgrp *)bh_log->b_data;
|
|
|
|
rgd = gfs2_blk2rgrpd(sdp, blkno, false);
|
|
if (rgd && rgd->rd_addr == blkno &&
|
|
rgd->rd_bits && rgd->rd_bits->bi_bh) {
|
|
fs_info(sdp, obsolete_rgrp_replay, (unsigned long long)blkno,
|
|
jd->jd_jid, bh_log->b_blocknr);
|
|
fs_info(sdp, obsolete_rgrp_replay2,
|
|
buffer_busy(rgd->rd_bits->bi_bh) ? 1 : 0,
|
|
buffer_pinned(rgd->rd_bits->bi_bh),
|
|
rgd->rd_igeneration,
|
|
be64_to_cpu(jrgd->rg_igeneration));
|
|
gfs2_dump_glock(NULL, rgd->rd_gl, true);
|
|
}
|
|
}
|
|
|
|
static int buf_lo_scan_elements(struct gfs2_jdesc *jd, u32 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(jd, &start);
|
|
|
|
for (; blks; gfs2_replay_incr_blk(jd, &start), blks--) {
|
|
blkno = be64_to_cpu(*ptr++);
|
|
|
|
jd->jd_found_blocks++;
|
|
|
|
if (gfs2_revoke_check(jd, 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 {
|
|
struct gfs2_meta_header *mh =
|
|
(struct gfs2_meta_header *)bh_ip->b_data;
|
|
|
|
if (mh->mh_type == cpu_to_be32(GFS2_METATYPE_RG))
|
|
obsolete_rgrp(jd, bh_log, blkno);
|
|
|
|
mark_buffer_dirty(bh_ip);
|
|
}
|
|
brelse(bh_log);
|
|
brelse(bh_ip);
|
|
|
|
if (error)
|
|
break;
|
|
|
|
jd->jd_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_inode_metasync(ip->i_gl);
|
|
return;
|
|
}
|
|
if (pass != 1)
|
|
return;
|
|
|
|
gfs2_inode_metasync(ip->i_gl);
|
|
|
|
fs_info(sdp, "jid=%u: Replayed %u of %u blocks\n",
|
|
jd->jd_jid, jd->jd_replayed_blocks, jd->jd_found_blocks);
|
|
}
|
|
|
|
static void revoke_lo_before_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
|
|
{
|
|
struct gfs2_meta_header *mh;
|
|
unsigned int offset;
|
|
struct list_head *head = &sdp->sd_log_revokes;
|
|
struct gfs2_bufdata *bd;
|
|
struct page *page;
|
|
unsigned int length;
|
|
|
|
gfs2_flush_revokes(sdp);
|
|
if (!sdp->sd_log_num_revoke)
|
|
return;
|
|
|
|
length = gfs2_struct2blk(sdp, sdp->sd_log_num_revoke);
|
|
page = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_REVOKE, length, sdp->sd_log_num_revoke);
|
|
offset = sizeof(struct gfs2_log_descriptor);
|
|
|
|
list_for_each_entry(bd, head, bd_list) {
|
|
sdp->sd_log_num_revoke--;
|
|
|
|
if (offset + sizeof(u64) > sdp->sd_sb.sb_bsize) {
|
|
gfs2_log_write_page(sdp, page);
|
|
page = mempool_alloc(gfs2_page_pool, GFP_NOIO);
|
|
mh = page_address(page);
|
|
clear_page(mh);
|
|
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 *)(page_address(page) + offset) = cpu_to_be64(bd->bd_blkno);
|
|
offset += sizeof(u64);
|
|
}
|
|
gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke);
|
|
|
|
gfs2_log_write_page(sdp, page);
|
|
}
|
|
|
|
void gfs2_drain_revokes(struct gfs2_sbd *sdp)
|
|
{
|
|
struct list_head *head = &sdp->sd_log_revokes;
|
|
struct gfs2_bufdata *bd;
|
|
struct gfs2_glock *gl;
|
|
|
|
while (!list_empty(head)) {
|
|
bd = list_first_entry(head, struct gfs2_bufdata, bd_list);
|
|
list_del_init(&bd->bd_list);
|
|
gl = bd->bd_gl;
|
|
gfs2_glock_remove_revoke(gl);
|
|
kmem_cache_free(gfs2_bufdata_cachep, bd);
|
|
}
|
|
}
|
|
|
|
static void revoke_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
|
|
{
|
|
gfs2_drain_revokes(sdp);
|
|
}
|
|
|
|
static void revoke_lo_before_scan(struct gfs2_jdesc *jd,
|
|
struct gfs2_log_header_host *head, int pass)
|
|
{
|
|
if (pass != 0)
|
|
return;
|
|
|
|
jd->jd_found_revokes = 0;
|
|
jd->jd_replay_tail = head->lh_tail;
|
|
}
|
|
|
|
static int revoke_lo_scan_elements(struct gfs2_jdesc *jd, u32 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(jd, &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(jd, blkno, start);
|
|
if (error < 0) {
|
|
brelse(bh);
|
|
return error;
|
|
}
|
|
else if (error)
|
|
jd->jd_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(jd);
|
|
return;
|
|
}
|
|
if (pass != 1)
|
|
return;
|
|
|
|
fs_info(sdp, "jid=%u: Found %u revoke tags\n",
|
|
jd->jd_jid, jd->jd_found_revokes);
|
|
|
|
gfs2_revoke_clean(jd);
|
|
}
|
|
|
|
/**
|
|
* databuf_lo_before_commit - Scan the data buffers, writing as we go
|
|
* @sdp: The filesystem
|
|
* @tr: The system transaction being flushed
|
|
*/
|
|
|
|
static void databuf_lo_before_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
|
|
{
|
|
unsigned int limit = databuf_limit(sdp);
|
|
unsigned int nbuf;
|
|
if (tr == NULL)
|
|
return;
|
|
nbuf = tr->tr_num_databuf_new - tr->tr_num_databuf_rm;
|
|
gfs2_before_commit(sdp, limit, nbuf, &tr->tr_databuf, 1);
|
|
}
|
|
|
|
static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, u32 start,
|
|
struct gfs2_log_descriptor *ld,
|
|
__be64 *ptr, int pass)
|
|
{
|
|
struct gfs2_inode *ip = GFS2_I(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(jd, &start);
|
|
for (; blks; gfs2_replay_incr_blk(jd, &start), blks--) {
|
|
blkno = be64_to_cpu(*ptr++);
|
|
esc = be64_to_cpu(*ptr++);
|
|
|
|
jd->jd_found_blocks++;
|
|
|
|
if (gfs2_revoke_check(jd, 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);
|
|
|
|
jd->jd_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_inode_metasync(ip->i_gl);
|
|
return;
|
|
}
|
|
if (pass != 1)
|
|
return;
|
|
|
|
/* data sync? */
|
|
gfs2_inode_metasync(ip->i_gl);
|
|
|
|
fs_info(sdp, "jid=%u: Replayed %u of %u data blocks\n",
|
|
jd->jd_jid, jd->jd_replayed_blocks, jd->jd_found_blocks);
|
|
}
|
|
|
|
static void databuf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
|
|
{
|
|
struct list_head *head;
|
|
struct gfs2_bufdata *bd;
|
|
|
|
if (tr == NULL)
|
|
return;
|
|
|
|
head = &tr->tr_databuf;
|
|
while (!list_empty(head)) {
|
|
bd = list_first_entry(head, struct gfs2_bufdata, bd_list);
|
|
list_del_init(&bd->bd_list);
|
|
gfs2_unpin(sdp, bd->bd_bh, tr);
|
|
}
|
|
}
|
|
|
|
|
|
static const struct gfs2_log_operations gfs2_buf_lops = {
|
|
.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",
|
|
};
|
|
|
|
static const struct gfs2_log_operations gfs2_revoke_lops = {
|
|
.lo_before_commit = revoke_lo_before_commit,
|
|
.lo_after_commit = revoke_lo_after_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",
|
|
};
|
|
|
|
static const struct gfs2_log_operations gfs2_databuf_lops = {
|
|
.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_databuf_lops,
|
|
&gfs2_buf_lops,
|
|
&gfs2_revoke_lops,
|
|
NULL,
|
|
};
|
|
|