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![Linus Torvalds](/assets/img/avatar_default.png)
- Fix a glock state (non-)transition bug when a dlm request times out and is canceled, and we have locking requests that can now be granted immediately. - Various fixes and cleanups in how the logd and quotad daemons are woken up and terminated. - Fix several bugs in the quota data reference counting and shrinking. Free quota data objects synchronously in put_super() instead of letting call_rcu() run wild. - Make sure not to deallocate quota data during a withdraw; rather, defer quota data deallocation to put_super(). Withdraws can happen in contexts in which callers on the stack are holding quota data references. - Many minor quota fixes and cleanups by Bob. - Update the the mailing list address for gfs2 and dlm. (It's the same list for both and we are moving it to gfs2@lists.linux.dev.) - Various other minor cleanups. -----BEGIN PGP SIGNATURE----- iQJIBAABCAAyFiEEJZs3krPW0xkhLMTc1b+f6wMTZToFAmT3T7UUHGFncnVlbmJh QHJlZGhhdC5jb20ACgkQ1b+f6wMTZTqxhw/+IWp+4cY4htNkTRG7xkheTeQ+5whG NU40mp7Hj+WY5GoHqsk676q1pBkVAq5mNN1kt9S/oC6lLHrdu1HLpdIkgFow2nAC nDqlEqx9/Da9Q4H/+K442usO90S4o1MmOXOE9xcGcvJLqK4FLDOVDXbUWa43OXrK 4HxgjgGSNPF4itD+U0o/V4f19jQ+4cNwmo6hGLyhsYillaUHiIXJezQlH7XycByM qGJqlG6odJ56wE38NG8Bt9Lj+91PsLLqO1TJxSYyzpf0h9QGQ2ySvu6/esTXwxWO XRuT4db7yjyAUhJoJMw+YU77xWQTz0/jriIDS7VqzvR1ns3GPaWdtb31TdUTBG4H IvBA8ep3oxHtcYFoPzCLBXgOIDej6KjAgS3RSv51yLeaZRHFUBc21fTSXbcDTIUs gkusZlRNQ9ANdBCVyf8hZxbE54HnaBJ8dKMZtynOXJEHs0EtGV8YKCNIpkFLxOvE vZkKcRsmVtuZ9fVhX1iH7dYmcsCMPI8RNo47k7hHk2EG8dU+eqyPSbi4QCmErNFf DlqX+fIuiDtOkbmWcrb2qdphn6j6bMLhDaOMJGIBOmgOPi+AU9dNAfmtu1cG4u1b 2TFyUISayiwqHJQgguzvDed15fxexYdgoLB7O9t9TMbCENxisguNa5TsAN6ZkiLQ 0hY6h80xSR2kCPU= =EonA -----END PGP SIGNATURE----- Merge tag 'gfs2-v6.5-rc5-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2 Pull gfs2 updates from Andreas Gruenbacher: - Fix a glock state (non-)transition bug when a dlm request times out and is canceled, and we have locking requests that can now be granted immediately - Various fixes and cleanups in how the logd and quotad daemons are woken up and terminated - Fix several bugs in the quota data reference counting and shrinking. Free quota data objects synchronously in put_super() instead of letting call_rcu() run wild - Make sure not to deallocate quota data during a withdraw; rather, defer quota data deallocation to put_super(). Withdraws can happen in contexts in which callers on the stack are holding quota data references - Many minor quota fixes and cleanups by Bob - Update the the mailing list address for gfs2 and dlm. (It's the same list for both and we are moving it to gfs2@lists.linux.dev) - Various other minor cleanups * tag 'gfs2-v6.5-rc5-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2: (51 commits) MAINTAINERS: Update dlm mailing list MAINTAINERS: Update gfs2 mailing list gfs2: change qd_slot_count to qd_slot_ref gfs2: check for no eligible quota changes gfs2: Remove useless assignment gfs2: simplify slot_get gfs2: Simplify qd2offset gfs2: introduce qd_bh_get_or_undo gfs2: Remove quota allocation info from quota file gfs2: use constant for array size gfs2: Set qd_sync_gen in do_sync gfs2: Remove useless err set gfs2: Small gfs2_quota_lock cleanup gfs2: move qdsb_put and reduce redundancy gfs2: improvements to sysfs status gfs2: Don't try to sync non-changes gfs2: Simplify function need_sync gfs2: remove unneeded pg_oflow variable gfs2: remove unneeded variable done gfs2: pass sdp to gfs2_write_buf_to_page ...
791 lines
21 KiB
C
791 lines
21 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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* Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
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*/
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#include <linux/spinlock.h>
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#include <linux/completion.h>
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#include <linux/buffer_head.h>
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#include <linux/gfs2_ondisk.h>
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#include <linux/bio.h>
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#include <linux/posix_acl.h>
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#include <linux/security.h>
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#include "gfs2.h"
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#include "incore.h"
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#include "bmap.h"
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#include "glock.h"
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#include "glops.h"
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#include "inode.h"
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#include "log.h"
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#include "meta_io.h"
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#include "recovery.h"
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#include "rgrp.h"
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#include "util.h"
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#include "trans.h"
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#include "dir.h"
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#include "lops.h"
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struct workqueue_struct *gfs2_freeze_wq;
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extern struct workqueue_struct *gfs2_control_wq;
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static void gfs2_ail_error(struct gfs2_glock *gl, const struct buffer_head *bh)
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{
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struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
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fs_err(sdp,
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"AIL buffer %p: blocknr %llu state 0x%08lx mapping %p page "
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"state 0x%lx\n",
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bh, (unsigned long long)bh->b_blocknr, bh->b_state,
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bh->b_folio->mapping, bh->b_folio->flags);
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fs_err(sdp, "AIL glock %u:%llu mapping %p\n",
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gl->gl_name.ln_type, gl->gl_name.ln_number,
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gfs2_glock2aspace(gl));
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gfs2_lm(sdp, "AIL error\n");
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gfs2_withdraw_delayed(sdp);
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}
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/**
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* __gfs2_ail_flush - remove all buffers for a given lock from the AIL
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* @gl: the glock
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* @fsync: set when called from fsync (not all buffers will be clean)
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* @nr_revokes: Number of buffers to revoke
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*
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* None of the buffers should be dirty, locked, or pinned.
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*/
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static void __gfs2_ail_flush(struct gfs2_glock *gl, bool fsync,
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unsigned int nr_revokes)
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{
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struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
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struct list_head *head = &gl->gl_ail_list;
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struct gfs2_bufdata *bd, *tmp;
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struct buffer_head *bh;
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const unsigned long b_state = (1UL << BH_Dirty)|(1UL << BH_Pinned)|(1UL << BH_Lock);
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gfs2_log_lock(sdp);
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spin_lock(&sdp->sd_ail_lock);
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list_for_each_entry_safe_reverse(bd, tmp, head, bd_ail_gl_list) {
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if (nr_revokes == 0)
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break;
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bh = bd->bd_bh;
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if (bh->b_state & b_state) {
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if (fsync)
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continue;
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gfs2_ail_error(gl, bh);
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}
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gfs2_trans_add_revoke(sdp, bd);
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nr_revokes--;
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}
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GLOCK_BUG_ON(gl, !fsync && atomic_read(&gl->gl_ail_count));
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spin_unlock(&sdp->sd_ail_lock);
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gfs2_log_unlock(sdp);
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}
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static int gfs2_ail_empty_gl(struct gfs2_glock *gl)
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{
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struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
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struct gfs2_trans tr;
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unsigned int revokes;
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int ret = 0;
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revokes = atomic_read(&gl->gl_ail_count);
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if (!revokes) {
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bool have_revokes;
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bool log_in_flight;
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/*
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* We have nothing on the ail, but there could be revokes on
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* the sdp revoke queue, in which case, we still want to flush
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* the log and wait for it to finish.
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*
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* If the sdp revoke list is empty too, we might still have an
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* io outstanding for writing revokes, so we should wait for
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* it before returning.
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*
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* If none of these conditions are true, our revokes are all
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* flushed and we can return.
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*/
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gfs2_log_lock(sdp);
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have_revokes = !list_empty(&sdp->sd_log_revokes);
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log_in_flight = atomic_read(&sdp->sd_log_in_flight);
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gfs2_log_unlock(sdp);
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if (have_revokes)
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goto flush;
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if (log_in_flight)
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log_flush_wait(sdp);
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return 0;
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}
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memset(&tr, 0, sizeof(tr));
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set_bit(TR_ONSTACK, &tr.tr_flags);
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ret = __gfs2_trans_begin(&tr, sdp, 0, revokes, _RET_IP_);
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if (ret) {
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fs_err(sdp, "Transaction error %d: Unable to write revokes.", ret);
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goto flush;
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}
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__gfs2_ail_flush(gl, 0, revokes);
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gfs2_trans_end(sdp);
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flush:
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if (!ret)
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gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL |
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GFS2_LFC_AIL_EMPTY_GL);
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return ret;
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}
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void gfs2_ail_flush(struct gfs2_glock *gl, bool fsync)
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{
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struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
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unsigned int revokes = atomic_read(&gl->gl_ail_count);
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int ret;
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if (!revokes)
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return;
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ret = gfs2_trans_begin(sdp, 0, revokes);
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if (ret)
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return;
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__gfs2_ail_flush(gl, fsync, revokes);
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gfs2_trans_end(sdp);
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gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL |
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GFS2_LFC_AIL_FLUSH);
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}
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/**
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* gfs2_rgrp_metasync - sync out the metadata of a resource group
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* @gl: the glock protecting the resource group
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*
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*/
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static int gfs2_rgrp_metasync(struct gfs2_glock *gl)
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{
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struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
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struct address_space *metamapping = &sdp->sd_aspace;
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struct gfs2_rgrpd *rgd = gfs2_glock2rgrp(gl);
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const unsigned bsize = sdp->sd_sb.sb_bsize;
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loff_t start = (rgd->rd_addr * bsize) & PAGE_MASK;
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loff_t end = PAGE_ALIGN((rgd->rd_addr + rgd->rd_length) * bsize) - 1;
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int error;
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filemap_fdatawrite_range(metamapping, start, end);
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error = filemap_fdatawait_range(metamapping, start, end);
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WARN_ON_ONCE(error && !gfs2_withdrawn(sdp));
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mapping_set_error(metamapping, error);
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if (error)
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gfs2_io_error(sdp);
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return error;
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}
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/**
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* rgrp_go_sync - sync out the metadata for this glock
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* @gl: the glock
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*
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* Called when demoting or unlocking an EX glock. We must flush
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* to disk all dirty buffers/pages relating to this glock, and must not
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* return to caller to demote/unlock the glock until I/O is complete.
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*/
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static int rgrp_go_sync(struct gfs2_glock *gl)
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{
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struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
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struct gfs2_rgrpd *rgd = gfs2_glock2rgrp(gl);
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int error;
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if (!rgd || !test_and_clear_bit(GLF_DIRTY, &gl->gl_flags))
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return 0;
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GLOCK_BUG_ON(gl, gl->gl_state != LM_ST_EXCLUSIVE);
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gfs2_log_flush(sdp, gl, GFS2_LOG_HEAD_FLUSH_NORMAL |
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GFS2_LFC_RGRP_GO_SYNC);
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error = gfs2_rgrp_metasync(gl);
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if (!error)
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error = gfs2_ail_empty_gl(gl);
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gfs2_free_clones(rgd);
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return error;
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}
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/**
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* rgrp_go_inval - invalidate the metadata for this glock
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* @gl: the glock
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* @flags:
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*
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* We never used LM_ST_DEFERRED with resource groups, so that we
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* should always see the metadata flag set here.
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*
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*/
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static void rgrp_go_inval(struct gfs2_glock *gl, int flags)
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{
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struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
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struct address_space *mapping = &sdp->sd_aspace;
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struct gfs2_rgrpd *rgd = gfs2_glock2rgrp(gl);
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const unsigned bsize = sdp->sd_sb.sb_bsize;
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loff_t start, end;
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if (!rgd)
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return;
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start = (rgd->rd_addr * bsize) & PAGE_MASK;
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end = PAGE_ALIGN((rgd->rd_addr + rgd->rd_length) * bsize) - 1;
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gfs2_rgrp_brelse(rgd);
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WARN_ON_ONCE(!(flags & DIO_METADATA));
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truncate_inode_pages_range(mapping, start, end);
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}
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static void gfs2_rgrp_go_dump(struct seq_file *seq, const struct gfs2_glock *gl,
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const char *fs_id_buf)
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{
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struct gfs2_rgrpd *rgd = gl->gl_object;
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if (rgd)
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gfs2_rgrp_dump(seq, rgd, fs_id_buf);
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}
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static struct gfs2_inode *gfs2_glock2inode(struct gfs2_glock *gl)
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{
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struct gfs2_inode *ip;
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spin_lock(&gl->gl_lockref.lock);
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ip = gl->gl_object;
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if (ip)
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set_bit(GIF_GLOP_PENDING, &ip->i_flags);
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spin_unlock(&gl->gl_lockref.lock);
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return ip;
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}
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struct gfs2_rgrpd *gfs2_glock2rgrp(struct gfs2_glock *gl)
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{
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struct gfs2_rgrpd *rgd;
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spin_lock(&gl->gl_lockref.lock);
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rgd = gl->gl_object;
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spin_unlock(&gl->gl_lockref.lock);
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return rgd;
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}
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static void gfs2_clear_glop_pending(struct gfs2_inode *ip)
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{
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if (!ip)
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return;
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clear_bit_unlock(GIF_GLOP_PENDING, &ip->i_flags);
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wake_up_bit(&ip->i_flags, GIF_GLOP_PENDING);
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}
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/**
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* gfs2_inode_metasync - sync out the metadata of an inode
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* @gl: the glock protecting the inode
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*
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*/
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int gfs2_inode_metasync(struct gfs2_glock *gl)
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{
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struct address_space *metamapping = gfs2_glock2aspace(gl);
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int error;
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filemap_fdatawrite(metamapping);
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error = filemap_fdatawait(metamapping);
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if (error)
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gfs2_io_error(gl->gl_name.ln_sbd);
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return error;
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}
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/**
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* inode_go_sync - Sync the dirty metadata of an inode
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* @gl: the glock protecting the inode
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*
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*/
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static int inode_go_sync(struct gfs2_glock *gl)
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{
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struct gfs2_inode *ip = gfs2_glock2inode(gl);
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int isreg = ip && S_ISREG(ip->i_inode.i_mode);
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struct address_space *metamapping = gfs2_glock2aspace(gl);
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int error = 0, ret;
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if (isreg) {
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if (test_and_clear_bit(GIF_SW_PAGED, &ip->i_flags))
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unmap_shared_mapping_range(ip->i_inode.i_mapping, 0, 0);
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inode_dio_wait(&ip->i_inode);
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}
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if (!test_and_clear_bit(GLF_DIRTY, &gl->gl_flags))
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goto out;
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GLOCK_BUG_ON(gl, gl->gl_state != LM_ST_EXCLUSIVE);
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gfs2_log_flush(gl->gl_name.ln_sbd, gl, GFS2_LOG_HEAD_FLUSH_NORMAL |
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GFS2_LFC_INODE_GO_SYNC);
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filemap_fdatawrite(metamapping);
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if (isreg) {
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struct address_space *mapping = ip->i_inode.i_mapping;
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filemap_fdatawrite(mapping);
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error = filemap_fdatawait(mapping);
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mapping_set_error(mapping, error);
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}
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ret = gfs2_inode_metasync(gl);
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if (!error)
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error = ret;
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ret = gfs2_ail_empty_gl(gl);
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if (!error)
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error = ret;
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/*
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* Writeback of the data mapping may cause the dirty flag to be set
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* so we have to clear it again here.
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*/
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smp_mb__before_atomic();
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clear_bit(GLF_DIRTY, &gl->gl_flags);
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out:
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gfs2_clear_glop_pending(ip);
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return error;
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}
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/**
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* inode_go_inval - prepare a inode glock to be released
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* @gl: the glock
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* @flags:
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*
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* Normally we invalidate everything, but if we are moving into
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* LM_ST_DEFERRED from LM_ST_SHARED or LM_ST_EXCLUSIVE then we
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* can keep hold of the metadata, since it won't have changed.
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*
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*/
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static void inode_go_inval(struct gfs2_glock *gl, int flags)
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{
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struct gfs2_inode *ip = gfs2_glock2inode(gl);
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if (flags & DIO_METADATA) {
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struct address_space *mapping = gfs2_glock2aspace(gl);
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truncate_inode_pages(mapping, 0);
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if (ip) {
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set_bit(GLF_INSTANTIATE_NEEDED, &gl->gl_flags);
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forget_all_cached_acls(&ip->i_inode);
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security_inode_invalidate_secctx(&ip->i_inode);
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gfs2_dir_hash_inval(ip);
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}
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}
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if (ip == GFS2_I(gl->gl_name.ln_sbd->sd_rindex)) {
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gfs2_log_flush(gl->gl_name.ln_sbd, NULL,
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GFS2_LOG_HEAD_FLUSH_NORMAL |
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GFS2_LFC_INODE_GO_INVAL);
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gl->gl_name.ln_sbd->sd_rindex_uptodate = 0;
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}
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if (ip && S_ISREG(ip->i_inode.i_mode))
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truncate_inode_pages(ip->i_inode.i_mapping, 0);
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gfs2_clear_glop_pending(ip);
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}
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/**
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* inode_go_demote_ok - Check to see if it's ok to unlock an inode glock
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* @gl: the glock
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*
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* Returns: 1 if it's ok
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*/
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static int inode_go_demote_ok(const struct gfs2_glock *gl)
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{
|
|
struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
|
|
|
|
if (sdp->sd_jindex == gl->gl_object || sdp->sd_rindex == gl->gl_object)
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
|
|
const struct gfs2_dinode *str = buf;
|
|
struct timespec64 atime;
|
|
u16 height, depth;
|
|
umode_t mode = be32_to_cpu(str->di_mode);
|
|
struct inode *inode = &ip->i_inode;
|
|
bool is_new = inode->i_state & I_NEW;
|
|
|
|
if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)))
|
|
goto corrupt;
|
|
if (unlikely(!is_new && inode_wrong_type(inode, mode)))
|
|
goto corrupt;
|
|
ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino);
|
|
inode->i_mode = mode;
|
|
if (is_new) {
|
|
inode->i_rdev = 0;
|
|
switch (mode & S_IFMT) {
|
|
case S_IFBLK:
|
|
case S_IFCHR:
|
|
inode->i_rdev = MKDEV(be32_to_cpu(str->di_major),
|
|
be32_to_cpu(str->di_minor));
|
|
break;
|
|
}
|
|
}
|
|
|
|
i_uid_write(inode, be32_to_cpu(str->di_uid));
|
|
i_gid_write(inode, be32_to_cpu(str->di_gid));
|
|
set_nlink(inode, be32_to_cpu(str->di_nlink));
|
|
i_size_write(inode, be64_to_cpu(str->di_size));
|
|
gfs2_set_inode_blocks(inode, be64_to_cpu(str->di_blocks));
|
|
atime.tv_sec = be64_to_cpu(str->di_atime);
|
|
atime.tv_nsec = be32_to_cpu(str->di_atime_nsec);
|
|
if (timespec64_compare(&inode->i_atime, &atime) < 0)
|
|
inode->i_atime = atime;
|
|
inode->i_mtime.tv_sec = be64_to_cpu(str->di_mtime);
|
|
inode->i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec);
|
|
inode_set_ctime(inode, be64_to_cpu(str->di_ctime),
|
|
be32_to_cpu(str->di_ctime_nsec));
|
|
|
|
ip->i_goal = be64_to_cpu(str->di_goal_meta);
|
|
ip->i_generation = be64_to_cpu(str->di_generation);
|
|
|
|
ip->i_diskflags = be32_to_cpu(str->di_flags);
|
|
ip->i_eattr = be64_to_cpu(str->di_eattr);
|
|
/* i_diskflags and i_eattr must be set before gfs2_set_inode_flags() */
|
|
gfs2_set_inode_flags(inode);
|
|
height = be16_to_cpu(str->di_height);
|
|
if (unlikely(height > sdp->sd_max_height))
|
|
goto corrupt;
|
|
ip->i_height = (u8)height;
|
|
|
|
depth = be16_to_cpu(str->di_depth);
|
|
if (unlikely(depth > GFS2_DIR_MAX_DEPTH))
|
|
goto corrupt;
|
|
ip->i_depth = (u8)depth;
|
|
ip->i_entries = be32_to_cpu(str->di_entries);
|
|
|
|
if (gfs2_is_stuffed(ip) && inode->i_size > gfs2_max_stuffed_size(ip))
|
|
goto corrupt;
|
|
|
|
if (S_ISREG(inode->i_mode))
|
|
gfs2_set_aops(inode);
|
|
|
|
return 0;
|
|
corrupt:
|
|
gfs2_consist_inode(ip);
|
|
return -EIO;
|
|
}
|
|
|
|
/**
|
|
* gfs2_inode_refresh - Refresh the incore copy of the dinode
|
|
* @ip: The GFS2 inode
|
|
*
|
|
* Returns: errno
|
|
*/
|
|
|
|
int gfs2_inode_refresh(struct gfs2_inode *ip)
|
|
{
|
|
struct buffer_head *dibh;
|
|
int error;
|
|
|
|
error = gfs2_meta_inode_buffer(ip, &dibh);
|
|
if (error)
|
|
return error;
|
|
|
|
error = gfs2_dinode_in(ip, dibh->b_data);
|
|
brelse(dibh);
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* inode_go_instantiate - read in an inode if necessary
|
|
* @gh: The glock holder
|
|
*
|
|
* Returns: errno
|
|
*/
|
|
|
|
static int inode_go_instantiate(struct gfs2_glock *gl)
|
|
{
|
|
struct gfs2_inode *ip = gl->gl_object;
|
|
|
|
if (!ip) /* no inode to populate - read it in later */
|
|
return 0;
|
|
|
|
return gfs2_inode_refresh(ip);
|
|
}
|
|
|
|
static int inode_go_held(struct gfs2_holder *gh)
|
|
{
|
|
struct gfs2_glock *gl = gh->gh_gl;
|
|
struct gfs2_inode *ip = gl->gl_object;
|
|
int error = 0;
|
|
|
|
if (!ip) /* no inode to populate - read it in later */
|
|
return 0;
|
|
|
|
if (gh->gh_state != LM_ST_DEFERRED)
|
|
inode_dio_wait(&ip->i_inode);
|
|
|
|
if ((ip->i_diskflags & GFS2_DIF_TRUNC_IN_PROG) &&
|
|
(gl->gl_state == LM_ST_EXCLUSIVE) &&
|
|
(gh->gh_state == LM_ST_EXCLUSIVE))
|
|
error = gfs2_truncatei_resume(ip);
|
|
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* inode_go_dump - print information about an inode
|
|
* @seq: The iterator
|
|
* @gl: The glock
|
|
* @fs_id_buf: file system id (may be empty)
|
|
*
|
|
*/
|
|
|
|
static void inode_go_dump(struct seq_file *seq, const struct gfs2_glock *gl,
|
|
const char *fs_id_buf)
|
|
{
|
|
struct gfs2_inode *ip = gl->gl_object;
|
|
const struct inode *inode = &ip->i_inode;
|
|
|
|
if (ip == NULL)
|
|
return;
|
|
|
|
gfs2_print_dbg(seq, "%s I: n:%llu/%llu t:%u f:0x%02lx d:0x%08x s:%llu "
|
|
"p:%lu\n", fs_id_buf,
|
|
(unsigned long long)ip->i_no_formal_ino,
|
|
(unsigned long long)ip->i_no_addr,
|
|
IF2DT(inode->i_mode), ip->i_flags,
|
|
(unsigned int)ip->i_diskflags,
|
|
(unsigned long long)i_size_read(inode),
|
|
inode->i_data.nrpages);
|
|
}
|
|
|
|
/**
|
|
* freeze_go_callback - A cluster node is requesting a freeze
|
|
* @gl: the glock
|
|
* @remote: true if this came from a different cluster node
|
|
*/
|
|
|
|
static void freeze_go_callback(struct gfs2_glock *gl, bool remote)
|
|
{
|
|
struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
|
|
struct super_block *sb = sdp->sd_vfs;
|
|
|
|
if (!remote ||
|
|
gl->gl_state != LM_ST_SHARED ||
|
|
gl->gl_demote_state != LM_ST_UNLOCKED)
|
|
return;
|
|
|
|
/*
|
|
* Try to get an active super block reference to prevent racing with
|
|
* unmount (see trylock_super()). But note that unmount isn't the only
|
|
* place where a write lock on s_umount is taken, and we can fail here
|
|
* because of things like remount as well.
|
|
*/
|
|
if (down_read_trylock(&sb->s_umount)) {
|
|
atomic_inc(&sb->s_active);
|
|
up_read(&sb->s_umount);
|
|
if (!queue_work(gfs2_freeze_wq, &sdp->sd_freeze_work))
|
|
deactivate_super(sb);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* freeze_go_xmote_bh - After promoting/demoting the freeze glock
|
|
* @gl: the glock
|
|
*/
|
|
static int freeze_go_xmote_bh(struct gfs2_glock *gl)
|
|
{
|
|
struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
|
|
struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode);
|
|
struct gfs2_glock *j_gl = ip->i_gl;
|
|
struct gfs2_log_header_host head;
|
|
int error;
|
|
|
|
if (test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
|
|
j_gl->gl_ops->go_inval(j_gl, DIO_METADATA);
|
|
|
|
error = gfs2_find_jhead(sdp->sd_jdesc, &head, false);
|
|
if (gfs2_assert_withdraw_delayed(sdp, !error))
|
|
return error;
|
|
if (gfs2_assert_withdraw_delayed(sdp, head.lh_flags &
|
|
GFS2_LOG_HEAD_UNMOUNT))
|
|
return -EIO;
|
|
sdp->sd_log_sequence = head.lh_sequence + 1;
|
|
gfs2_log_pointers_init(sdp, head.lh_blkno);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* freeze_go_demote_ok
|
|
* @gl: the glock
|
|
*
|
|
* Always returns 0
|
|
*/
|
|
|
|
static int freeze_go_demote_ok(const struct gfs2_glock *gl)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* iopen_go_callback - schedule the dcache entry for the inode to be deleted
|
|
* @gl: the glock
|
|
* @remote: true if this came from a different cluster node
|
|
*
|
|
* gl_lockref.lock lock is held while calling this
|
|
*/
|
|
static void iopen_go_callback(struct gfs2_glock *gl, bool remote)
|
|
{
|
|
struct gfs2_inode *ip = gl->gl_object;
|
|
struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
|
|
|
|
if (!remote || sb_rdonly(sdp->sd_vfs) ||
|
|
test_bit(SDF_KILL, &sdp->sd_flags))
|
|
return;
|
|
|
|
if (gl->gl_demote_state == LM_ST_UNLOCKED &&
|
|
gl->gl_state == LM_ST_SHARED && ip) {
|
|
gl->gl_lockref.count++;
|
|
if (!gfs2_queue_try_to_evict(gl))
|
|
gl->gl_lockref.count--;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* inode_go_free - wake up anyone waiting for dlm's unlock ast to free it
|
|
* @gl: glock being freed
|
|
*
|
|
* For now, this is only used for the journal inode glock. In withdraw
|
|
* situations, we need to wait for the glock to be freed so that we know
|
|
* other nodes may proceed with recovery / journal replay.
|
|
*/
|
|
static void inode_go_free(struct gfs2_glock *gl)
|
|
{
|
|
/* Note that we cannot reference gl_object because it's already set
|
|
* to NULL by this point in its lifecycle. */
|
|
if (!test_bit(GLF_FREEING, &gl->gl_flags))
|
|
return;
|
|
clear_bit_unlock(GLF_FREEING, &gl->gl_flags);
|
|
wake_up_bit(&gl->gl_flags, GLF_FREEING);
|
|
}
|
|
|
|
/**
|
|
* nondisk_go_callback - used to signal when a node did a withdraw
|
|
* @gl: the nondisk glock
|
|
* @remote: true if this came from a different cluster node
|
|
*
|
|
*/
|
|
static void nondisk_go_callback(struct gfs2_glock *gl, bool remote)
|
|
{
|
|
struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
|
|
|
|
/* Ignore the callback unless it's from another node, and it's the
|
|
live lock. */
|
|
if (!remote || gl->gl_name.ln_number != GFS2_LIVE_LOCK)
|
|
return;
|
|
|
|
/* First order of business is to cancel the demote request. We don't
|
|
* really want to demote a nondisk glock. At best it's just to inform
|
|
* us of another node's withdraw. We'll keep it in SH mode. */
|
|
clear_bit(GLF_DEMOTE, &gl->gl_flags);
|
|
clear_bit(GLF_PENDING_DEMOTE, &gl->gl_flags);
|
|
|
|
/* Ignore the unlock if we're withdrawn, unmounting, or in recovery. */
|
|
if (test_bit(SDF_NORECOVERY, &sdp->sd_flags) ||
|
|
test_bit(SDF_WITHDRAWN, &sdp->sd_flags) ||
|
|
test_bit(SDF_REMOTE_WITHDRAW, &sdp->sd_flags))
|
|
return;
|
|
|
|
/* We only care when a node wants us to unlock, because that means
|
|
* they want a journal recovered. */
|
|
if (gl->gl_demote_state != LM_ST_UNLOCKED)
|
|
return;
|
|
|
|
if (sdp->sd_args.ar_spectator) {
|
|
fs_warn(sdp, "Spectator node cannot recover journals.\n");
|
|
return;
|
|
}
|
|
|
|
fs_warn(sdp, "Some node has withdrawn; checking for recovery.\n");
|
|
set_bit(SDF_REMOTE_WITHDRAW, &sdp->sd_flags);
|
|
/*
|
|
* We can't call remote_withdraw directly here or gfs2_recover_journal
|
|
* because this is called from the glock unlock function and the
|
|
* remote_withdraw needs to enqueue and dequeue the same "live" glock
|
|
* we were called from. So we queue it to the control work queue in
|
|
* lock_dlm.
|
|
*/
|
|
queue_delayed_work(gfs2_control_wq, &sdp->sd_control_work, 0);
|
|
}
|
|
|
|
const struct gfs2_glock_operations gfs2_meta_glops = {
|
|
.go_type = LM_TYPE_META,
|
|
.go_flags = GLOF_NONDISK,
|
|
};
|
|
|
|
const struct gfs2_glock_operations gfs2_inode_glops = {
|
|
.go_sync = inode_go_sync,
|
|
.go_inval = inode_go_inval,
|
|
.go_demote_ok = inode_go_demote_ok,
|
|
.go_instantiate = inode_go_instantiate,
|
|
.go_held = inode_go_held,
|
|
.go_dump = inode_go_dump,
|
|
.go_type = LM_TYPE_INODE,
|
|
.go_flags = GLOF_ASPACE | GLOF_LRU | GLOF_LVB,
|
|
.go_free = inode_go_free,
|
|
};
|
|
|
|
const struct gfs2_glock_operations gfs2_rgrp_glops = {
|
|
.go_sync = rgrp_go_sync,
|
|
.go_inval = rgrp_go_inval,
|
|
.go_instantiate = gfs2_rgrp_go_instantiate,
|
|
.go_dump = gfs2_rgrp_go_dump,
|
|
.go_type = LM_TYPE_RGRP,
|
|
.go_flags = GLOF_LVB,
|
|
};
|
|
|
|
const struct gfs2_glock_operations gfs2_freeze_glops = {
|
|
.go_xmote_bh = freeze_go_xmote_bh,
|
|
.go_demote_ok = freeze_go_demote_ok,
|
|
.go_callback = freeze_go_callback,
|
|
.go_type = LM_TYPE_NONDISK,
|
|
.go_flags = GLOF_NONDISK,
|
|
};
|
|
|
|
const struct gfs2_glock_operations gfs2_iopen_glops = {
|
|
.go_type = LM_TYPE_IOPEN,
|
|
.go_callback = iopen_go_callback,
|
|
.go_dump = inode_go_dump,
|
|
.go_flags = GLOF_LRU | GLOF_NONDISK,
|
|
.go_subclass = 1,
|
|
};
|
|
|
|
const struct gfs2_glock_operations gfs2_flock_glops = {
|
|
.go_type = LM_TYPE_FLOCK,
|
|
.go_flags = GLOF_LRU | GLOF_NONDISK,
|
|
};
|
|
|
|
const struct gfs2_glock_operations gfs2_nondisk_glops = {
|
|
.go_type = LM_TYPE_NONDISK,
|
|
.go_flags = GLOF_NONDISK,
|
|
.go_callback = nondisk_go_callback,
|
|
};
|
|
|
|
const struct gfs2_glock_operations gfs2_quota_glops = {
|
|
.go_type = LM_TYPE_QUOTA,
|
|
.go_flags = GLOF_LVB | GLOF_LRU | GLOF_NONDISK,
|
|
};
|
|
|
|
const struct gfs2_glock_operations gfs2_journal_glops = {
|
|
.go_type = LM_TYPE_JOURNAL,
|
|
.go_flags = GLOF_NONDISK,
|
|
};
|
|
|
|
const struct gfs2_glock_operations *gfs2_glops_list[] = {
|
|
[LM_TYPE_META] = &gfs2_meta_glops,
|
|
[LM_TYPE_INODE] = &gfs2_inode_glops,
|
|
[LM_TYPE_RGRP] = &gfs2_rgrp_glops,
|
|
[LM_TYPE_IOPEN] = &gfs2_iopen_glops,
|
|
[LM_TYPE_FLOCK] = &gfs2_flock_glops,
|
|
[LM_TYPE_NONDISK] = &gfs2_nondisk_glops,
|
|
[LM_TYPE_QUOTA] = &gfs2_quota_glops,
|
|
[LM_TYPE_JOURNAL] = &gfs2_journal_glops,
|
|
};
|
|
|