// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
*/
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/completion.h>
#include <linux/buffer_head.h>
#include <linux/mempool.h>
#include <linux/gfs2_ondisk.h>
#include <linux/bio.h>
#include <linux/fs.h>
#include <linux/list_sort.h>
#include <linux/blkdev.h>
#include "bmap.h"
#include "dir.h"
#include "gfs2.h"
#include "incore.h"
#include "inode.h"
#include "glock.h"
#include "glops.h"
#include "log.h"
#include "lops.h"
#include "meta_io.h"
#include "recovery.h"
#include "rgrp.h"
#include "trans.h"
#include "util.h"
#include "trace_gfs2.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
*/
void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh)
{
struct gfs2_bufdata *bd;
BUG_ON(!current->journal_info);
clear_buffer_dirty(bh);
if (test_set_buffer_pinned(bh))
gfs2_assert_withdraw(sdp, 0);
if (!buffer_uptodate(bh))
gfs2_io_error_bh_wd(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.
*/
spin_lock(&sdp->sd_ail_lock);
if (bd->bd_tr)
list_move(&bd->bd_ail_st_list, &bd->bd_tr->tr_ail2_list);
spin_unlock(&sdp->sd_ail_lock);
get_bh(bh);
atomic_inc(&sdp->sd_log_pinned);
trace_gfs2_pin(bd, 1);
}
static bool buffer_is_rgrp(const struct gfs2_bufdata *bd)
{
return bd->bd_gl->gl_name.ln_type == LM_TYPE_RGRP;
}
static void maybe_release_space(struct gfs2_bufdata *bd)
{
struct gfs2_glock *gl = bd->bd_gl;
struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
struct gfs2_rgrpd *rgd = gfs2_glock2rgrp(gl);
unsigned int index = bd->bd_bh->b_blocknr - gl->gl_name.ln_number;
struct gfs2_bitmap *bi = rgd->rd_bits + index;
rgrp_lock_local(rgd);
if (bi->bi_clone == NULL)
goto out;
if (sdp->sd_args.ar_discard)
gfs2_rgrp_send_discards(sdp, rgd->rd_data0, bd->bd_bh, bi, 1, NULL);
memcpy(bi->bi_clone + bi->bi_offset,
bd->bd_bh->b_data + bi->bi_offset, bi->bi_bytes);
clear_bit(GBF_FULL, &bi->bi_flags);
rgd->rd_free_clone = rgd->rd_free;
BUG_ON(rgd->rd_free_clone < rgd->rd_reserved);
rgd->rd_extfail_pt = rgd->rd_free;
out:
rgrp_unlock_local(rgd);
}
/**
* gfs2_unpin - Unpin a buffer
* @sdp: the filesystem the buffer belongs to
* @bh: The buffer to unpin
* @tr: The system transaction being flushed
*/
static void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh,
struct gfs2_trans *tr)
{
struct gfs2_bufdata *bd = bh->b_private;
BUG_ON(!buffer_uptodate(bh));
BUG_ON(!buffer_pinned(bh));
lock_buffer(bh);
mark_buffer_dirty(bh);
clear_buffer_pinned(bh);
if (buffer_is_rgrp(bd))
maybe_release_space(bd);
spin_lock(&sdp->sd_ail_lock);
if (bd->bd_tr) {
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_tr = tr;
list_add(&bd->bd_ail_st_list, &tr->tr_ail1_list);
spin_unlock(&sdp->sd_ail_lock);
clear_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
trace_gfs2_pin(bd, 0);
unlock_buffer(bh);
atomic_dec(&sdp->sd_log_pinned);
}
void gfs2_log_incr_head(struct gfs2_sbd *sdp)
{
BUG_ON((sdp->sd_log_flush_head == sdp->sd_log_tail) &&
(sdp->sd_log_flush_head != sdp->sd_log_head));
if (++sdp->sd_log_flush_head == sdp->sd_jdesc->jd_blocks)
sdp->sd_log_flush_head = 0;
}
u64 gfs2_log_bmap(struct gfs2_jdesc *jd, unsigned int lblock)
{
struct gfs2_journal_extent *je;
list_for_each_entry(je, &jd->extent_list, list) {
if (lblock >= je->lblock && lblock < je->lblock + je->blocks)
return je->dblock + lblock - je->lblock;
}
return -1;
}
/**
* gfs2_end_log_write_bh - end log write of pagecache data with buffers
* @sdp: The superblock
* @bvec: The bio_vec
* @error: The i/o status
*
* This finds the relevant buffers and unlocks them and sets the
* error flag according to the status of the i/o request. This is
* used when the log is writing data which has an in-place version
* that is pinned in the pagecache.
*/
static void gfs2_end_log_write_bh(struct gfs2_sbd *sdp,
struct bio_vec *bvec,
blk_status_t error)
{
struct buffer_head *bh, *next;
struct page *page = bvec->bv_page;
unsigned size;
bh = page_buffers(page);
size = bvec->bv_len;
while (bh_offset(bh) < bvec->bv_offset)
bh = bh->b_this_page;
do {
if (error)
mark_buffer_write_io_error(bh);
unlock_buffer(bh);
next = bh->b_this_page;
size -= bh->b_size;
brelse(bh);
bh = next;
} while(bh && size);
}
/**
* gfs2_end_log_write - end of i/o to the log
* @bio: The bio
*
* Each bio_vec contains either data from the pagecache or data
* relating to the log itself. Here we iterate over the bio_vec
* array, processing both kinds of data.
*
*/
static void gfs2_end_log_write(struct bio *bio)
{
struct gfs2_sbd *sdp = bio->bi_private;
struct bio_vec *bvec;
struct page *page;
struct bvec_iter_all iter_all;
if (bio->bi_status) {
if (!cmpxchg(&sdp->sd_log_error, 0, (int)bio->bi_status))
fs_err(sdp, "Error %d writing to journal, jid=%u\n",
bio->bi_status, sdp->sd_jdesc->jd_jid);
gfs2_withdraw_delayed(sdp);
/* prevent more writes to the journal */
clear_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags);
wake_up(&sdp->sd_logd_waitq);
}
bio_for_each_segment_all(bvec, bio, iter_all) {
page = bvec->bv_page;
if (page_has_buffers(page))
gfs2_end_log_write_bh(sdp, bvec, bio->bi_status);
else
mempool_free(page, gfs2_page_pool);
}
bio_put(bio);
if (atomic_dec_and_test(&sdp->sd_log_in_flight))
wake_up(&sdp->sd_log_flush_wait);
}
/**
* gfs2_log_submit_bio - Submit any pending log bio
* @biop: Address of the bio pointer
* @opf: REQ_OP | op_flags
*
* Submit any pending part-built or full bio to the block device. If
* there is no pending bio, then this is a no-op.
*/
void gfs2_log_submit_bio(struct bio **biop, blk_opf_t opf)
{
struct bio *bio = *biop;
if (bio) {
struct gfs2_sbd *sdp = bio->bi_private;
atomic_inc(&sdp->sd_log_in_flight);
bio->bi_opf = opf;
submit_bio(bio);
*biop = NULL;
}
}
/**
* gfs2_log_alloc_bio - Allocate a bio
* @sdp: The super block
* @blkno: The device block number we want to write to
* @end_io: The bi_end_io callback
*
* Allocate a new bio, initialize it with the given parameters and return it.
*
* Returns: The newly allocated bio
*/
static struct bio *gfs2_log_alloc_bio(struct gfs2_sbd *sdp, u64 blkno,
bio_end_io_t *end_io)
{
struct super_block *sb = sdp->sd_vfs;
struct bio *bio = bio_alloc(sb->s_bdev, BIO_MAX_VECS, 0, GFP_NOIO);
bio->bi_iter.bi_sector = blkno << sdp->sd_fsb2bb_shift;
bio->bi_end_io = end_io;
bio->bi_private = sdp;
return bio;
}
/**
* gfs2_log_get_bio - Get cached log bio, or allocate a new one
* @sdp: The super block
* @blkno: The device block number we want to write to
* @biop: The bio to get or allocate
* @op: REQ_OP
* @end_io: The bi_end_io callback
* @flush: Always flush the current bio and allocate a new one?
*
* If there is a cached bio, then if the next block number is sequential
* with the previous one, return it, otherwise flush the bio to the
* device. If there is no cached bio, or we just flushed it, then
* allocate a new one.
*
* Returns: The bio to use for log writes
*/
static struct bio *gfs2_log_get_bio(struct gfs2_sbd *sdp, u64 blkno,
struct bio **biop, enum req_op op,
bio_end_io_t *end_io, bool flush)
{
struct bio *bio = *biop;
if (bio) {
u64 nblk;
nblk = bio_end_sector(bio);
nblk >>= sdp->sd_fsb2bb_shift;
if (blkno == nblk && !flush)
return bio;
gfs2_log_submit_bio(biop, op);
}
*biop = gfs2_log_alloc_bio(sdp, blkno, end_io);
return *biop;
}
/**
* gfs2_log_write - write to log
* @sdp: the filesystem
* @jd: The journal descriptor
* @page: the page to write
* @size: the size of the data to write
* @offset: the offset within the page
* @blkno: block number of the log entry
*
* Try and add the page segment to the current bio. If that fails,
* submit the current bio to the device and create a new one, and
* then add the page segment to that.
*/
void gfs2_log_write(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd,
struct page *page, unsigned size, unsigned offset,
u64 blkno)
{
struct bio *bio;
int ret;
bio = gfs2_log_get_bio(sdp, blkno, &jd->jd_log_bio, REQ_OP_WRITE,
gfs2_end_log_write, false);
ret = bio_add_page(bio, page, size, offset);
if (ret == 0) {
bio = gfs2_log_get_bio(sdp, blkno, &jd->jd_log_bio,
REQ_OP_WRITE, gfs2_end_log_write, true);
ret = bio_add_page(bio, page, size, offset);
WARN_ON(ret == 0);
}
}
/**
* gfs2_log_write_bh - write a buffer's content to the log
* @sdp: The super block
* @bh: The buffer pointing to the in-place location
*
* This writes the content of the buffer to the next available location
* in the log. The buffer will be unlocked once the i/o to the log has
* completed.
*/
static void gfs2_log_write_bh(struct gfs2_sbd *sdp, struct buffer_head *bh)
{
u64 dblock;
dblock = gfs2_log_bmap(sdp->sd_jdesc, sdp->sd_log_flush_head);
gfs2_log_incr_head(sdp);
gfs2_log_write(sdp, sdp->sd_jdesc, bh->b_page, bh->b_size,
bh_offset(bh), dblock);
}
/**
* gfs2_log_write_page - write one block stored in a page, into the log
* @sdp: The superblock
* @page: The struct page
*
* This writes the first block-sized part of the page into the log. Note
* that the page must have been allocated from the gfs2_page_pool mempool
* and that after this has been called, ownership has been transferred and
* the page may be freed at any time.
*/
static void gfs2_log_write_page(struct gfs2_sbd *sdp, struct page *page)
{
struct super_block *sb = sdp->sd_vfs;
u64 dblock;
dblock = gfs2_log_bmap(sdp->sd_jdesc, sdp->sd_log_flush_head);
gfs2_log_incr_head(sdp);
gfs2_log_write(sdp, sdp->sd_jdesc, page, sb->s_blocksize, 0, dblock);
}
/**
* gfs2_end_log_read - end I/O callback for reads from the log
* @bio: The bio
*
* Simply unlock the pages in the bio. The main thread will wait on them and
* process them in order as necessary.
*/
static void gfs2_end_log_read(struct bio *bio)
{
int error = blk_status_to_errno(bio->bi_status);
struct folio_iter fi;
bio_for_each_folio_all(fi, bio) {
/* We're abusing wb_err to get the error to gfs2_find_jhead */
filemap_set_wb_err(fi.folio->mapping, error);
folio_end_read(fi.folio, !error);
}
bio_put(bio);
}
/**
* gfs2_jhead_pg_srch - Look for the journal head in a given page.
* @jd: The journal descriptor
* @head: The journal head to start from
* @page: The page to look in
*
* 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;
unsigned int offset;
bool ret = false;
kaddr = kmap_local_page(page);
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_local(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 grab_cache_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_uptodate(folio))
*done = true;
if (!*done)
*done = gfs2_jhead_pg_srch(jd, head, &folio->page);
/* filemap_get_folio() and the earlier grab_cache_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 = grab_cache_page(mapping, block >> shift);
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_local_page(bh->b_page);
ptr = kaddr + bh_offset(bh);
if (*ptr == cpu_to_be32(GFS2_MAGIC))
set_buffer_escaped(bh);
kunmap_local(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 *p;
page = mempool_alloc(gfs2_page_pool, GFP_NOIO);
p = page_address(page);
memcpy_from_page(p, page, bh_offset(bd2->bd_bh), bd2->bd_bh->b_size);
*(__be32 *)p = 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,
};
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