^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/completion.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/buffer_head.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/pagemap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/writeback.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/swap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/bio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/gfs2_ondisk.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include "gfs2.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include "incore.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include "glock.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include "glops.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include "inode.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include "log.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include "lops.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include "meta_io.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include "rgrp.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include "trans.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include "util.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include "trace_gfs2.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) static int gfs2_aspace_writepage(struct page *page, struct writeback_control *wbc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) struct buffer_head *bh, *head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) int nr_underway = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) int write_flags = REQ_META | REQ_PRIO | wbc_to_write_flags(wbc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) BUG_ON(!PageLocked(page));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) BUG_ON(!page_has_buffers(page));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) head = page_buffers(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) bh = head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) if (!buffer_mapped(bh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) * If it's a fully non-blocking write attempt and we cannot
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) * lock the buffer then redirty the page. Note that this can
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) * potentially cause a busy-wait loop from flusher thread and kswapd
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) * activity, but those code paths have their own higher-level
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) * throttling.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) if (wbc->sync_mode != WB_SYNC_NONE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) lock_buffer(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) } else if (!trylock_buffer(bh)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) redirty_page_for_writepage(wbc, page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) if (test_clear_buffer_dirty(bh)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) mark_buffer_async_write(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) unlock_buffer(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) } while ((bh = bh->b_this_page) != head);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * The page and its buffers are protected by PageWriteback(), so we can
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) * drop the bh refcounts early.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) BUG_ON(PageWriteback(page));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) set_page_writeback(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) struct buffer_head *next = bh->b_this_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) if (buffer_async_write(bh)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) submit_bh(REQ_OP_WRITE, write_flags, bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) nr_underway++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) bh = next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) } while (bh != head);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) unlock_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) if (nr_underway == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) end_page_writeback(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) const struct address_space_operations gfs2_meta_aops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) .writepage = gfs2_aspace_writepage,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) .releasepage = gfs2_releasepage,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) const struct address_space_operations gfs2_rgrp_aops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) .writepage = gfs2_aspace_writepage,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) .releasepage = gfs2_releasepage,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) * gfs2_getbuf - Get a buffer with a given address space
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) * @gl: the glock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) * @blkno: the block number (filesystem scope)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) * @create: 1 if the buffer should be created
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) * Returns: the buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) struct buffer_head *gfs2_getbuf(struct gfs2_glock *gl, u64 blkno, int create)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) struct address_space *mapping = gfs2_glock2aspace(gl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) struct page *page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) unsigned int shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) unsigned long index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) unsigned int bufnum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) if (mapping == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) mapping = &sdp->sd_aspace;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) shift = PAGE_SHIFT - sdp->sd_sb.sb_bsize_shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) index = blkno >> shift; /* convert block to page */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) bufnum = blkno - (index << shift); /* block buf index within page */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) if (create) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) for (;;) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) page = grab_cache_page(mapping, index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) if (page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) yield();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) page = find_get_page_flags(mapping, index,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) FGP_LOCK|FGP_ACCESSED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) if (!page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) if (!page_has_buffers(page))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) create_empty_buffers(page, sdp->sd_sb.sb_bsize, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) /* Locate header for our buffer within our page */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) for (bh = page_buffers(page); bufnum--; bh = bh->b_this_page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) /* Do nothing */;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) get_bh(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) if (!buffer_mapped(bh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) map_bh(bh, sdp->sd_vfs, blkno);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) unlock_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) put_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) return bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) static void meta_prep_new(struct buffer_head *bh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) struct gfs2_meta_header *mh = (struct gfs2_meta_header *)bh->b_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) lock_buffer(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) clear_buffer_dirty(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) set_buffer_uptodate(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) unlock_buffer(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) mh->mh_magic = cpu_to_be32(GFS2_MAGIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) * gfs2_meta_new - Get a block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) * @gl: The glock associated with this block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) * @blkno: The block number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) * Returns: The buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) struct buffer_head *gfs2_meta_new(struct gfs2_glock *gl, u64 blkno)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) bh = gfs2_getbuf(gl, blkno, CREATE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) meta_prep_new(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) return bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) static void gfs2_meta_read_endio(struct bio *bio)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) struct bio_vec *bvec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) struct bvec_iter_all iter_all;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) bio_for_each_segment_all(bvec, bio, iter_all) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) struct page *page = bvec->bv_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) struct buffer_head *bh = page_buffers(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) unsigned int len = bvec->bv_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) while (bh_offset(bh) < bvec->bv_offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) bh = bh->b_this_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) struct buffer_head *next = bh->b_this_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) len -= bh->b_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) bh->b_end_io(bh, !bio->bi_status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) bh = next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) } while (bh && len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) bio_put(bio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) * Submit several consecutive buffer head I/O requests as a single bio I/O
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) * request. (See submit_bh_wbc.)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) static void gfs2_submit_bhs(int op, int op_flags, struct buffer_head *bhs[],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) int num)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) while (num > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) struct buffer_head *bh = *bhs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) struct bio *bio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) bio = bio_alloc(GFP_NOIO, num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) bio->bi_iter.bi_sector = bh->b_blocknr * (bh->b_size >> 9);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) bio_set_dev(bio, bh->b_bdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) while (num > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) bh = *bhs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) if (!bio_add_page(bio, bh->b_page, bh->b_size, bh_offset(bh))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) BUG_ON(bio->bi_iter.bi_size == 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) bhs++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) num--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) bio->bi_end_io = gfs2_meta_read_endio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) bio_set_op_attrs(bio, op, op_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) submit_bio(bio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) * gfs2_meta_read - Read a block from disk
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) * @gl: The glock covering the block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) * @blkno: The block number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) * @flags: flags
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) * @bhp: the place where the buffer is returned (NULL on failure)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) * Returns: errno
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) int gfs2_meta_read(struct gfs2_glock *gl, u64 blkno, int flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) int rahead, struct buffer_head **bhp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) struct buffer_head *bh, *bhs[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) int num = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) if (unlikely(gfs2_withdrawn(sdp)) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) (!sdp->sd_jdesc || gl != sdp->sd_jinode_gl)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) *bhp = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) *bhp = bh = gfs2_getbuf(gl, blkno, CREATE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) lock_buffer(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) if (buffer_uptodate(bh)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) unlock_buffer(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) flags &= ~DIO_WAIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) bh->b_end_io = end_buffer_read_sync;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) get_bh(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) bhs[num++] = bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) if (rahead) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) bh = gfs2_getbuf(gl, blkno + 1, CREATE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) lock_buffer(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) if (buffer_uptodate(bh)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) unlock_buffer(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) bh->b_end_io = end_buffer_read_sync;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) bhs[num++] = bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) gfs2_submit_bhs(REQ_OP_READ, REQ_META | REQ_PRIO, bhs, num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) if (!(flags & DIO_WAIT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) bh = *bhp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) wait_on_buffer(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) if (unlikely(!buffer_uptodate(bh))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) struct gfs2_trans *tr = current->journal_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) if (tr && test_bit(TR_TOUCHED, &tr->tr_flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) gfs2_io_error_bh_wd(sdp, bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) *bhp = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) * gfs2_meta_wait - Reread a block from disk
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) * @sdp: the filesystem
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) * @bh: The block to wait for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) * Returns: errno
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) int gfs2_meta_wait(struct gfs2_sbd *sdp, struct buffer_head *bh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) if (unlikely(gfs2_withdrawn(sdp)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) wait_on_buffer(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) if (!buffer_uptodate(bh)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) struct gfs2_trans *tr = current->journal_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) if (tr && test_bit(TR_TOUCHED, &tr->tr_flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) gfs2_io_error_bh_wd(sdp, bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) if (unlikely(gfs2_withdrawn(sdp)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) void gfs2_remove_from_journal(struct buffer_head *bh, int meta)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) struct address_space *mapping = bh->b_page->mapping;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) struct gfs2_sbd *sdp = gfs2_mapping2sbd(mapping);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) struct gfs2_bufdata *bd = bh->b_private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) struct gfs2_trans *tr = current->journal_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) int was_pinned = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) if (test_clear_buffer_pinned(bh)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) trace_gfs2_pin(bd, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) atomic_dec(&sdp->sd_log_pinned);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) list_del_init(&bd->bd_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) if (meta == REMOVE_META)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) tr->tr_num_buf_rm++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) tr->tr_num_databuf_rm++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) set_bit(TR_TOUCHED, &tr->tr_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) was_pinned = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) if (bd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) if (bd->bd_tr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) gfs2_trans_add_revoke(sdp, bd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) } else if (was_pinned) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) bh->b_private = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) kmem_cache_free(gfs2_bufdata_cachep, bd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) } else if (!list_empty(&bd->bd_ail_st_list) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) !list_empty(&bd->bd_ail_gl_list)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) gfs2_remove_from_ail(bd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) clear_buffer_dirty(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) clear_buffer_uptodate(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) * gfs2_ail1_wipe - remove deleted/freed buffers from the ail1 list
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) * @sdp: superblock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) * @bstart: starting block address of buffers to remove
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) * @blen: length of buffers to be removed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) * This function is called from gfs2_journal wipe, whose job is to remove
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) * buffers, corresponding to deleted blocks, from the journal. If we find any
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) * bufdata elements on the system ail1 list, they haven't been written to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) * the journal yet. So we remove them.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) static void gfs2_ail1_wipe(struct gfs2_sbd *sdp, u64 bstart, u32 blen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) struct gfs2_trans *tr, *s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) struct gfs2_bufdata *bd, *bs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) u64 end = bstart + blen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) gfs2_log_lock(sdp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) spin_lock(&sdp->sd_ail_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) list_for_each_entry_safe(tr, s, &sdp->sd_ail1_list, tr_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) list_for_each_entry_safe(bd, bs, &tr->tr_ail1_list,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) bd_ail_st_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) bh = bd->bd_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) if (bh->b_blocknr < bstart || bh->b_blocknr >= end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) gfs2_remove_from_journal(bh, REMOVE_JDATA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) spin_unlock(&sdp->sd_ail_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) gfs2_log_unlock(sdp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) static struct buffer_head *gfs2_getjdatabuf(struct gfs2_inode *ip, u64 blkno)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) struct address_space *mapping = ip->i_inode.i_mapping;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) struct page *page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) unsigned int shift = PAGE_SHIFT - sdp->sd_sb.sb_bsize_shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) unsigned long index = blkno >> shift; /* convert block to page */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) unsigned int bufnum = blkno - (index << shift);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) page = find_get_page_flags(mapping, index, FGP_LOCK|FGP_ACCESSED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) if (!page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) if (!page_has_buffers(page)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) unlock_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) put_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) /* Locate header for our buffer within our page */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) for (bh = page_buffers(page); bufnum--; bh = bh->b_this_page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) /* Do nothing */;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) get_bh(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) unlock_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) put_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) return bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) * gfs2_journal_wipe - make inode's buffers so they aren't dirty/pinned anymore
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) * @ip: the inode who owns the buffers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) * @bstart: the first buffer in the run
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) * @blen: the number of buffers in the run
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) void gfs2_journal_wipe(struct gfs2_inode *ip, u64 bstart, u32 blen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) int ty;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) gfs2_ail1_wipe(sdp, bstart, blen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) while (blen) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) ty = REMOVE_META;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) bh = gfs2_getbuf(ip->i_gl, bstart, NO_CREATE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) if (!bh && gfs2_is_jdata(ip)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) bh = gfs2_getjdatabuf(ip, bstart);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) ty = REMOVE_JDATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) if (bh) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) lock_buffer(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) gfs2_log_lock(sdp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) spin_lock(&sdp->sd_ail_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) gfs2_remove_from_journal(bh, ty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) spin_unlock(&sdp->sd_ail_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) gfs2_log_unlock(sdp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) unlock_buffer(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) bstart++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) blen--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) * gfs2_meta_indirect_buffer - Get a metadata buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) * @ip: The GFS2 inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) * @height: The level of this buf in the metadata (indir addr) tree (if any)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) * @num: The block number (device relative) of the buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) * @bhp: the buffer is returned here
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) * Returns: errno
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) int gfs2_meta_indirect_buffer(struct gfs2_inode *ip, int height, u64 num,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) struct buffer_head **bhp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) struct gfs2_glock *gl = ip->i_gl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) u32 mtype = height ? GFS2_METATYPE_IN : GFS2_METATYPE_DI;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) int rahead = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) if (num == ip->i_no_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) rahead = ip->i_rahead;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) ret = gfs2_meta_read(gl, num, DIO_WAIT, rahead, &bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) if (ret == 0 && gfs2_metatype_check(sdp, bh, mtype)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) ret = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) *bhp = bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) * gfs2_meta_ra - start readahead on an extent of a file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) * @gl: the glock the blocks belong to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) * @dblock: the starting disk block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) * @extlen: the number of blocks in the extent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) * returns: the first buffer in the extent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) struct buffer_head *gfs2_meta_ra(struct gfs2_glock *gl, u64 dblock, u32 extlen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) struct buffer_head *first_bh, *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) u32 max_ra = gfs2_tune_get(sdp, gt_max_readahead) >>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) sdp->sd_sb.sb_bsize_shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) BUG_ON(!extlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) if (max_ra < 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) max_ra = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) if (extlen > max_ra)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) extlen = max_ra;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) first_bh = gfs2_getbuf(gl, dblock, CREATE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) if (buffer_uptodate(first_bh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) if (!buffer_locked(first_bh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) ll_rw_block(REQ_OP_READ, REQ_META | REQ_PRIO, 1, &first_bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) dblock++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) extlen--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) while (extlen) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) bh = gfs2_getbuf(gl, dblock, CREATE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) if (!buffer_uptodate(bh) && !buffer_locked(bh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) ll_rw_block(REQ_OP_READ,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) REQ_RAHEAD | REQ_META | REQ_PRIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) 1, &bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) dblock++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) extlen--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) if (!buffer_locked(first_bh) && buffer_uptodate(first_bh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) wait_on_buffer(first_bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) return first_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548)
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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