forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1110 lines
28 KiB
1110 lines
28 KiB
// 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 |
|
* @ai: |
|
* @flags: The inode dirty flags |
|
* |
|
*/ |
|
|
|
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, int 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(GFP_NOIO, BIO_MAX_VECS); |
|
|
|
bio->bi_iter.bi_sector = blkno << sdp->sd_fsb2bb_shift; |
|
bio_set_dev(bio, sb->s_bdev); |
|
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 |
|
* @bio: 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, int 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 |
|
* @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) |
|
{ |
|
struct page *page; |
|
struct bio_vec *bvec; |
|
struct bvec_iter_all iter_all; |
|
|
|
bio_for_each_segment_all(bvec, bio, iter_all) { |
|
page = bvec->bv_page; |
|
if (bio->bi_status) { |
|
int err = blk_status_to_errno(bio->bi_status); |
|
|
|
SetPageError(page); |
|
mapping_set_error(page->mapping, err); |
|
} |
|
unlock_page(page); |
|
} |
|
|
|
bio_put(bio); |
|
} |
|
|
|
/** |
|
* gfs2_jhead_pg_srch - Look for the journal head in a given page. |
|
* @jd: The journal descriptor |
|
* @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 = 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 |
|
* @done: If set, perform only cleanup, else search and set if found. |
|
* |
|
* Find the page with 'index' in the journal's mapping. Search the page for |
|
* the journal head if requested (cleanup == false). Release refs on the |
|
* page so the page cache can reclaim it (put_page() twice). We grabbed a |
|
* reference on this page two times, first when we did a find_or_create_page() |
|
* to obtain the page to add it to the bio and second when we do a |
|
* find_get_page() here to get the page to wait on while I/O on it is being |
|
* completed. |
|
* This function is also used to free up a page 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 page. |
|
*/ |
|
|
|
static void gfs2_jhead_process_page(struct gfs2_jdesc *jd, unsigned long index, |
|
struct gfs2_log_header_host *head, |
|
bool *done) |
|
{ |
|
struct page *page; |
|
|
|
page = find_get_page(jd->jd_inode->i_mapping, index); |
|
wait_on_page_locked(page); |
|
|
|
if (PageError(page)) |
|
*done = true; |
|
|
|
if (!*done) |
|
*done = gfs2_jhead_pg_srch(jd, head, page); |
|
|
|
put_page(page); /* Once for find_get_page */ |
|
put_page(page); /* Once more for find_or_create_page */ |
|
} |
|
|
|
static struct bio *gfs2_chain_bio(struct bio *prev, unsigned int nr_iovecs) |
|
{ |
|
struct bio *new; |
|
|
|
new = bio_alloc(GFP_NOIO, nr_iovecs); |
|
bio_copy_dev(new, prev); |
|
new->bi_iter.bi_sector = bio_end_sector(prev); |
|
new->bi_opf = prev->bi_opf; |
|
new->bi_write_hint = prev->bi_write_hint; |
|
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 |
|
* |
|
* 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, struct list_head *a, 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; |
|
} |
|
|
|
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)) { |
|
struct gfs2_rgrpd *rgd; |
|
|
|
rgd = gfs2_blk2rgrpd(sdp, blkno, false); |
|
if (rgd && rgd->rd_addr == blkno && |
|
rgd->rd_bits && rgd->rd_bits->bi_bh) { |
|
fs_info(sdp, "Replaying 0x%llx but we " |
|
"already have a bh!\n", |
|
(unsigned long long)blkno); |
|
fs_info(sdp, "busy:%d, pinned:%d\n", |
|
buffer_busy(rgd->rd_bits->bi_bh) ? 1 : 0, |
|
buffer_pinned(rgd->rd_bits->bi_bh)); |
|
gfs2_dump_glock(NULL, rgd->rd_gl, true); |
|
} |
|
} |
|
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); |
|
} |
|
|
|
static void revoke_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) |
|
{ |
|
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_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 |
|
* |
|
*/ |
|
|
|
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, |
|
}; |
|
|
|
|