713f883438
The demote_ok glock operation is only still used to prevent the inode glocks of the "jindex" and "rindex" directories from getting recycled while they are still referenced by sdp->sd_jindex and sdp->sd_rindex. However, the LRU walking code will no longer recycle glocks which are referenced, so the demote_ok glock operation is obsolete and can be removed. Each of a glock's holders in the gl_holders list is holding a reference on the glock, so when the list of holders isn't empty in demote_ok(), the existing reference count check will already prevent the glock from getting released. This means that demote_ok() is obsolete as well. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
772 lines
20 KiB
C
772 lines
20 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
|
|
* Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
|
|
*/
|
|
|
|
#include <linux/spinlock.h>
|
|
#include <linux/completion.h>
|
|
#include <linux/buffer_head.h>
|
|
#include <linux/gfs2_ondisk.h>
|
|
#include <linux/bio.h>
|
|
#include <linux/posix_acl.h>
|
|
#include <linux/security.h>
|
|
|
|
#include "gfs2.h"
|
|
#include "incore.h"
|
|
#include "bmap.h"
|
|
#include "glock.h"
|
|
#include "glops.h"
|
|
#include "inode.h"
|
|
#include "log.h"
|
|
#include "meta_io.h"
|
|
#include "recovery.h"
|
|
#include "rgrp.h"
|
|
#include "util.h"
|
|
#include "trans.h"
|
|
#include "dir.h"
|
|
#include "lops.h"
|
|
|
|
struct workqueue_struct *gfs2_freeze_wq;
|
|
|
|
extern struct workqueue_struct *gfs2_control_wq;
|
|
|
|
static void gfs2_ail_error(struct gfs2_glock *gl, const struct buffer_head *bh)
|
|
{
|
|
struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
|
|
|
|
fs_err(sdp,
|
|
"AIL buffer %p: blocknr %llu state 0x%08lx mapping %p page "
|
|
"state 0x%lx\n",
|
|
bh, (unsigned long long)bh->b_blocknr, bh->b_state,
|
|
bh->b_folio->mapping, bh->b_folio->flags);
|
|
fs_err(sdp, "AIL glock %u:%llu mapping %p\n",
|
|
gl->gl_name.ln_type, gl->gl_name.ln_number,
|
|
gfs2_glock2aspace(gl));
|
|
gfs2_lm(sdp, "AIL error\n");
|
|
gfs2_withdraw_delayed(sdp);
|
|
}
|
|
|
|
/**
|
|
* __gfs2_ail_flush - remove all buffers for a given lock from the AIL
|
|
* @gl: the glock
|
|
* @fsync: set when called from fsync (not all buffers will be clean)
|
|
* @nr_revokes: Number of buffers to revoke
|
|
*
|
|
* None of the buffers should be dirty, locked, or pinned.
|
|
*/
|
|
|
|
static void __gfs2_ail_flush(struct gfs2_glock *gl, bool fsync,
|
|
unsigned int nr_revokes)
|
|
{
|
|
struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
|
|
struct list_head *head = &gl->gl_ail_list;
|
|
struct gfs2_bufdata *bd, *tmp;
|
|
struct buffer_head *bh;
|
|
const unsigned long b_state = (1UL << BH_Dirty)|(1UL << BH_Pinned)|(1UL << BH_Lock);
|
|
|
|
gfs2_log_lock(sdp);
|
|
spin_lock(&sdp->sd_ail_lock);
|
|
list_for_each_entry_safe_reverse(bd, tmp, head, bd_ail_gl_list) {
|
|
if (nr_revokes == 0)
|
|
break;
|
|
bh = bd->bd_bh;
|
|
if (bh->b_state & b_state) {
|
|
if (fsync)
|
|
continue;
|
|
gfs2_ail_error(gl, bh);
|
|
}
|
|
gfs2_trans_add_revoke(sdp, bd);
|
|
nr_revokes--;
|
|
}
|
|
GLOCK_BUG_ON(gl, !fsync && atomic_read(&gl->gl_ail_count));
|
|
spin_unlock(&sdp->sd_ail_lock);
|
|
gfs2_log_unlock(sdp);
|
|
|
|
if (gfs2_withdrawing(sdp))
|
|
gfs2_withdraw(sdp);
|
|
}
|
|
|
|
|
|
static int gfs2_ail_empty_gl(struct gfs2_glock *gl)
|
|
{
|
|
struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
|
|
struct gfs2_trans tr;
|
|
unsigned int revokes;
|
|
int ret = 0;
|
|
|
|
revokes = atomic_read(&gl->gl_ail_count);
|
|
|
|
if (!revokes) {
|
|
bool have_revokes;
|
|
bool log_in_flight;
|
|
|
|
/*
|
|
* We have nothing on the ail, but there could be revokes on
|
|
* the sdp revoke queue, in which case, we still want to flush
|
|
* the log and wait for it to finish.
|
|
*
|
|
* If the sdp revoke list is empty too, we might still have an
|
|
* io outstanding for writing revokes, so we should wait for
|
|
* it before returning.
|
|
*
|
|
* If none of these conditions are true, our revokes are all
|
|
* flushed and we can return.
|
|
*/
|
|
gfs2_log_lock(sdp);
|
|
have_revokes = !list_empty(&sdp->sd_log_revokes);
|
|
log_in_flight = atomic_read(&sdp->sd_log_in_flight);
|
|
gfs2_log_unlock(sdp);
|
|
if (have_revokes)
|
|
goto flush;
|
|
if (log_in_flight)
|
|
log_flush_wait(sdp);
|
|
return 0;
|
|
}
|
|
|
|
memset(&tr, 0, sizeof(tr));
|
|
set_bit(TR_ONSTACK, &tr.tr_flags);
|
|
ret = __gfs2_trans_begin(&tr, sdp, 0, revokes, _RET_IP_);
|
|
if (ret) {
|
|
fs_err(sdp, "Transaction error %d: Unable to write revokes.", ret);
|
|
goto flush;
|
|
}
|
|
__gfs2_ail_flush(gl, 0, revokes);
|
|
gfs2_trans_end(sdp);
|
|
|
|
flush:
|
|
if (!ret)
|
|
gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL |
|
|
GFS2_LFC_AIL_EMPTY_GL);
|
|
return ret;
|
|
}
|
|
|
|
void gfs2_ail_flush(struct gfs2_glock *gl, bool fsync)
|
|
{
|
|
struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
|
|
unsigned int revokes = atomic_read(&gl->gl_ail_count);
|
|
int ret;
|
|
|
|
if (!revokes)
|
|
return;
|
|
|
|
ret = gfs2_trans_begin(sdp, 0, revokes);
|
|
if (ret)
|
|
return;
|
|
__gfs2_ail_flush(gl, fsync, revokes);
|
|
gfs2_trans_end(sdp);
|
|
gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL |
|
|
GFS2_LFC_AIL_FLUSH);
|
|
}
|
|
|
|
/**
|
|
* gfs2_rgrp_metasync - sync out the metadata of a resource group
|
|
* @gl: the glock protecting the resource group
|
|
*
|
|
*/
|
|
|
|
static int gfs2_rgrp_metasync(struct gfs2_glock *gl)
|
|
{
|
|
struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
|
|
struct address_space *metamapping = &sdp->sd_aspace;
|
|
struct gfs2_rgrpd *rgd = gfs2_glock2rgrp(gl);
|
|
const unsigned bsize = sdp->sd_sb.sb_bsize;
|
|
loff_t start = (rgd->rd_addr * bsize) & PAGE_MASK;
|
|
loff_t end = PAGE_ALIGN((rgd->rd_addr + rgd->rd_length) * bsize) - 1;
|
|
int error;
|
|
|
|
filemap_fdatawrite_range(metamapping, start, end);
|
|
error = filemap_fdatawait_range(metamapping, start, end);
|
|
WARN_ON_ONCE(error && !gfs2_withdrawing_or_withdrawn(sdp));
|
|
mapping_set_error(metamapping, error);
|
|
if (error)
|
|
gfs2_io_error(sdp);
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* rgrp_go_sync - sync out the metadata for this glock
|
|
* @gl: the glock
|
|
*
|
|
* Called when demoting or unlocking an EX glock. We must flush
|
|
* to disk all dirty buffers/pages relating to this glock, and must not
|
|
* return to caller to demote/unlock the glock until I/O is complete.
|
|
*/
|
|
|
|
static int rgrp_go_sync(struct gfs2_glock *gl)
|
|
{
|
|
struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
|
|
struct gfs2_rgrpd *rgd = gfs2_glock2rgrp(gl);
|
|
int error;
|
|
|
|
if (!rgd || !test_and_clear_bit(GLF_DIRTY, &gl->gl_flags))
|
|
return 0;
|
|
GLOCK_BUG_ON(gl, gl->gl_state != LM_ST_EXCLUSIVE);
|
|
|
|
gfs2_log_flush(sdp, gl, GFS2_LOG_HEAD_FLUSH_NORMAL |
|
|
GFS2_LFC_RGRP_GO_SYNC);
|
|
error = gfs2_rgrp_metasync(gl);
|
|
if (!error)
|
|
error = gfs2_ail_empty_gl(gl);
|
|
gfs2_free_clones(rgd);
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* rgrp_go_inval - invalidate the metadata for this glock
|
|
* @gl: the glock
|
|
* @flags:
|
|
*
|
|
* We never used LM_ST_DEFERRED with resource groups, so that we
|
|
* should always see the metadata flag set here.
|
|
*
|
|
*/
|
|
|
|
static void rgrp_go_inval(struct gfs2_glock *gl, int flags)
|
|
{
|
|
struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
|
|
struct address_space *mapping = &sdp->sd_aspace;
|
|
struct gfs2_rgrpd *rgd = gfs2_glock2rgrp(gl);
|
|
const unsigned bsize = sdp->sd_sb.sb_bsize;
|
|
loff_t start, end;
|
|
|
|
if (!rgd)
|
|
return;
|
|
start = (rgd->rd_addr * bsize) & PAGE_MASK;
|
|
end = PAGE_ALIGN((rgd->rd_addr + rgd->rd_length) * bsize) - 1;
|
|
gfs2_rgrp_brelse(rgd);
|
|
WARN_ON_ONCE(!(flags & DIO_METADATA));
|
|
truncate_inode_pages_range(mapping, start, end);
|
|
}
|
|
|
|
static void gfs2_rgrp_go_dump(struct seq_file *seq, const struct gfs2_glock *gl,
|
|
const char *fs_id_buf)
|
|
{
|
|
struct gfs2_rgrpd *rgd = gl->gl_object;
|
|
|
|
if (rgd)
|
|
gfs2_rgrp_dump(seq, rgd, fs_id_buf);
|
|
}
|
|
|
|
static struct gfs2_inode *gfs2_glock2inode(struct gfs2_glock *gl)
|
|
{
|
|
struct gfs2_inode *ip;
|
|
|
|
spin_lock(&gl->gl_lockref.lock);
|
|
ip = gl->gl_object;
|
|
if (ip)
|
|
set_bit(GIF_GLOP_PENDING, &ip->i_flags);
|
|
spin_unlock(&gl->gl_lockref.lock);
|
|
return ip;
|
|
}
|
|
|
|
struct gfs2_rgrpd *gfs2_glock2rgrp(struct gfs2_glock *gl)
|
|
{
|
|
struct gfs2_rgrpd *rgd;
|
|
|
|
spin_lock(&gl->gl_lockref.lock);
|
|
rgd = gl->gl_object;
|
|
spin_unlock(&gl->gl_lockref.lock);
|
|
|
|
return rgd;
|
|
}
|
|
|
|
static void gfs2_clear_glop_pending(struct gfs2_inode *ip)
|
|
{
|
|
if (!ip)
|
|
return;
|
|
|
|
clear_bit_unlock(GIF_GLOP_PENDING, &ip->i_flags);
|
|
wake_up_bit(&ip->i_flags, GIF_GLOP_PENDING);
|
|
}
|
|
|
|
/**
|
|
* gfs2_inode_metasync - sync out the metadata of an inode
|
|
* @gl: the glock protecting the inode
|
|
*
|
|
*/
|
|
int gfs2_inode_metasync(struct gfs2_glock *gl)
|
|
{
|
|
struct address_space *metamapping = gfs2_glock2aspace(gl);
|
|
int error;
|
|
|
|
filemap_fdatawrite(metamapping);
|
|
error = filemap_fdatawait(metamapping);
|
|
if (error)
|
|
gfs2_io_error(gl->gl_name.ln_sbd);
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* inode_go_sync - Sync the dirty metadata of an inode
|
|
* @gl: the glock protecting the inode
|
|
*
|
|
*/
|
|
|
|
static int inode_go_sync(struct gfs2_glock *gl)
|
|
{
|
|
struct gfs2_inode *ip = gfs2_glock2inode(gl);
|
|
int isreg = ip && S_ISREG(ip->i_inode.i_mode);
|
|
struct address_space *metamapping = gfs2_glock2aspace(gl);
|
|
int error = 0, ret;
|
|
|
|
if (isreg) {
|
|
if (test_and_clear_bit(GIF_SW_PAGED, &ip->i_flags))
|
|
unmap_shared_mapping_range(ip->i_inode.i_mapping, 0, 0);
|
|
inode_dio_wait(&ip->i_inode);
|
|
}
|
|
if (!test_and_clear_bit(GLF_DIRTY, &gl->gl_flags))
|
|
goto out;
|
|
|
|
GLOCK_BUG_ON(gl, gl->gl_state != LM_ST_EXCLUSIVE);
|
|
|
|
gfs2_log_flush(gl->gl_name.ln_sbd, gl, GFS2_LOG_HEAD_FLUSH_NORMAL |
|
|
GFS2_LFC_INODE_GO_SYNC);
|
|
filemap_fdatawrite(metamapping);
|
|
if (isreg) {
|
|
struct address_space *mapping = ip->i_inode.i_mapping;
|
|
filemap_fdatawrite(mapping);
|
|
error = filemap_fdatawait(mapping);
|
|
mapping_set_error(mapping, error);
|
|
}
|
|
ret = gfs2_inode_metasync(gl);
|
|
if (!error)
|
|
error = ret;
|
|
ret = gfs2_ail_empty_gl(gl);
|
|
if (!error)
|
|
error = ret;
|
|
/*
|
|
* Writeback of the data mapping may cause the dirty flag to be set
|
|
* so we have to clear it again here.
|
|
*/
|
|
smp_mb__before_atomic();
|
|
clear_bit(GLF_DIRTY, &gl->gl_flags);
|
|
|
|
out:
|
|
gfs2_clear_glop_pending(ip);
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* inode_go_inval - prepare a inode glock to be released
|
|
* @gl: the glock
|
|
* @flags:
|
|
*
|
|
* Normally we invalidate everything, but if we are moving into
|
|
* LM_ST_DEFERRED from LM_ST_SHARED or LM_ST_EXCLUSIVE then we
|
|
* can keep hold of the metadata, since it won't have changed.
|
|
*
|
|
*/
|
|
|
|
static void inode_go_inval(struct gfs2_glock *gl, int flags)
|
|
{
|
|
struct gfs2_inode *ip = gfs2_glock2inode(gl);
|
|
|
|
if (flags & DIO_METADATA) {
|
|
struct address_space *mapping = gfs2_glock2aspace(gl);
|
|
truncate_inode_pages(mapping, 0);
|
|
if (ip) {
|
|
set_bit(GLF_INSTANTIATE_NEEDED, &gl->gl_flags);
|
|
forget_all_cached_acls(&ip->i_inode);
|
|
security_inode_invalidate_secctx(&ip->i_inode);
|
|
gfs2_dir_hash_inval(ip);
|
|
}
|
|
}
|
|
|
|
if (ip == GFS2_I(gl->gl_name.ln_sbd->sd_rindex)) {
|
|
gfs2_log_flush(gl->gl_name.ln_sbd, NULL,
|
|
GFS2_LOG_HEAD_FLUSH_NORMAL |
|
|
GFS2_LFC_INODE_GO_INVAL);
|
|
gl->gl_name.ln_sbd->sd_rindex_uptodate = 0;
|
|
}
|
|
if (ip && S_ISREG(ip->i_inode.i_mode))
|
|
truncate_inode_pages(ip->i_inode.i_mapping, 0);
|
|
|
|
gfs2_clear_glop_pending(ip);
|
|
}
|
|
|
|
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, iatime;
|
|
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))) {
|
|
gfs2_consist_inode(ip);
|
|
return -EIO;
|
|
}
|
|
if (unlikely(!is_new && inode_wrong_type(inode, mode))) {
|
|
gfs2_consist_inode(ip);
|
|
return -EIO;
|
|
}
|
|
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);
|
|
iatime = inode_get_atime(inode);
|
|
if (timespec64_compare(&iatime, &atime) < 0)
|
|
inode_set_atime_to_ts(inode, atime);
|
|
inode_set_mtime(inode, be64_to_cpu(str->di_mtime),
|
|
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)) {
|
|
gfs2_consist_inode(ip);
|
|
return -EIO;
|
|
}
|
|
ip->i_height = (u8)height;
|
|
|
|
depth = be16_to_cpu(str->di_depth);
|
|
if (unlikely(depth > GFS2_DIR_MAX_DEPTH)) {
|
|
gfs2_consist_inode(ip);
|
|
return -EIO;
|
|
}
|
|
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)) {
|
|
gfs2_consist_inode(ip);
|
|
return -EIO;
|
|
}
|
|
if (S_ISREG(inode->i_mode))
|
|
gfs2_set_aops(inode);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* 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
|
|
* @gl: The glock
|
|
*
|
|
* 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_state != LM_ST_UNLOCKED) ||
|
|
gl->gl_demote_state != LM_ST_UNLOCKED)
|
|
return;
|
|
|
|
/*
|
|
* Try to get an active super block reference to prevent racing with
|
|
* unmount (see super_trylock_shared()). 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;
|
|
}
|
|
|
|
/**
|
|
* 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_unlocked - wake up anyone waiting for dlm's unlock ast
|
|
* @gl: glock being unlocked
|
|
*
|
|
* For now, this is only used for the journal inode glock. In withdraw
|
|
* situations, we need to wait for the glock to be unlocked so that we know
|
|
* other nodes may proceed with recovery / journal replay.
|
|
*/
|
|
static void inode_go_unlocked(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_UNLOCKED, &gl->gl_flags))
|
|
return;
|
|
clear_bit_unlock(GLF_UNLOCKED, &gl->gl_flags);
|
|
wake_up_bit(&gl->gl_flags, GLF_UNLOCKED);
|
|
}
|
|
|
|
/**
|
|
* 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_instantiate = inode_go_instantiate,
|
|
.go_held = inode_go_held,
|
|
.go_dump = inode_go_dump,
|
|
.go_type = LM_TYPE_INODE,
|
|
.go_flags = GLOF_ASPACE | GLOF_LVB,
|
|
.go_unlocked = inode_go_unlocked,
|
|
};
|
|
|
|
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_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_NONDISK,
|
|
.go_subclass = 1,
|
|
};
|
|
|
|
const struct gfs2_glock_operations gfs2_flock_glops = {
|
|
.go_type = LM_TYPE_FLOCK,
|
|
.go_flags = 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_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,
|
|
};
|
|
|