diff options
Diffstat (limited to 'fs/gfs2/glops.c')
| -rw-r--r-- | fs/gfs2/glops.c | 820 |
1 files changed, 820 insertions, 0 deletions
diff --git a/fs/gfs2/glops.c b/fs/gfs2/glops.c new file mode 100644 index 000000000..87f811088 --- /dev/null +++ b/fs/gfs2/glops.c @@ -0,0 +1,820 @@ +// 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) +{ + fs_err(gl->gl_name.ln_sbd, + "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_page->mapping, bh->b_page->flags); + fs_err(gl->gl_name.ln_sbd, "AIL glock %u:%llu mapping %p\n", + gl->gl_name.ln_type, gl->gl_name.ln_number, + gfs2_glock2aspace(gl)); + gfs2_lm(gl->gl_name.ln_sbd, "AIL error\n"); + gfs2_withdraw(gl->gl_name.ln_sbd); +} + +/** + * __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) + * + * 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); +} + + +static int gfs2_ail_empty_gl(struct gfs2_glock *gl) +{ + struct gfs2_sbd *sdp = gl->gl_name.ln_sbd; + struct gfs2_trans tr; + int ret; + + memset(&tr, 0, sizeof(tr)); + INIT_LIST_HEAD(&tr.tr_buf); + INIT_LIST_HEAD(&tr.tr_databuf); + INIT_LIST_HEAD(&tr.tr_ail1_list); + INIT_LIST_HEAD(&tr.tr_ail2_list); + tr.tr_revokes = atomic_read(&gl->gl_ail_count); + + if (!tr.tr_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; + } + + /* A shortened, inline version of gfs2_trans_begin() + * tr->alloced is not set since the transaction structure is + * on the stack */ + tr.tr_reserved = 1 + gfs2_struct2blk(sdp, tr.tr_revokes); + tr.tr_ip = _RET_IP_; + ret = gfs2_log_reserve(sdp, tr.tr_reserved); + if (ret < 0) + return ret; + WARN_ON_ONCE(current->journal_info); + current->journal_info = &tr; + + __gfs2_ail_flush(gl, 0, tr.tr_revokes); + + gfs2_trans_end(sdp); +flush: + gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL | + GFS2_LFC_AIL_EMPTY_GL); + return 0; +} + +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); + unsigned int max_revokes = (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_log_descriptor)) / sizeof(u64); + int ret; + + if (!revokes) + return; + + while (revokes > max_revokes) + max_revokes += (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header)) / sizeof(u64); + + ret = gfs2_trans_begin(sdp, 0, max_revokes); + if (ret) + return; + __gfs2_ail_flush(gl, fsync, max_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_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 (!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 = (rgd->rd_addr * bsize) & PAGE_MASK; + loff_t 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); + rgd->rd_flags &= ~GFS2_RDF_UPTODATE; +} + +static void gfs2_rgrp_go_dump(struct seq_file *seq, 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; + gfs2_ail_empty_gl(gl); + /* + * 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(GIF_INVALID, &ip->i_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); +} + +/** + * inode_go_demote_ok - Check to see if it's ok to unlock an inode glock + * @gl: the glock + * + * Returns: 1 if it's ok + */ + +static int inode_go_demote_ok(const struct gfs2_glock *gl) +{ + 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; + + if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr))) + goto corrupt; + ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino); + ip->i_inode.i_mode = be32_to_cpu(str->di_mode); + ip->i_inode.i_rdev = 0; + switch (ip->i_inode.i_mode & S_IFMT) { + case S_IFBLK: + case S_IFCHR: + ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major), + be32_to_cpu(str->di_minor)); + break; + } + + i_uid_write(&ip->i_inode, be32_to_cpu(str->di_uid)); + i_gid_write(&ip->i_inode, be32_to_cpu(str->di_gid)); + set_nlink(&ip->i_inode, be32_to_cpu(str->di_nlink)); + i_size_write(&ip->i_inode, be64_to_cpu(str->di_size)); + gfs2_set_inode_blocks(&ip->i_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(&ip->i_inode.i_atime, &atime) < 0) + ip->i_inode.i_atime = atime; + ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime); + ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec); + ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime); + ip->i_inode.i_ctime.tv_nsec = 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(&ip->i_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) && ip->i_inode.i_size > gfs2_max_stuffed_size(ip)) + goto corrupt; + + if (S_ISREG(ip->i_inode.i_mode)) + gfs2_set_aops(&ip->i_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); + clear_bit(GIF_INVALID, &ip->i_flags); + + return error; +} + +/** + * inode_go_lock - operation done after an inode lock is locked by a process + * @gl: the glock + * @flags: + * + * Returns: errno + */ + +static int inode_go_lock(struct gfs2_holder *gh) +{ + struct gfs2_glock *gl = gh->gh_gl; + struct gfs2_sbd *sdp = gl->gl_name.ln_sbd; + struct gfs2_inode *ip = gl->gl_object; + int error = 0; + + if (!ip || (gh->gh_flags & GL_SKIP)) + return 0; + + if (test_bit(GIF_INVALID, &ip->i_flags)) { + error = gfs2_inode_refresh(ip); + if (error) + return error; + } + + 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)) { + spin_lock(&sdp->sd_trunc_lock); + if (list_empty(&ip->i_trunc_list)) + list_add(&ip->i_trunc_list, &sdp->sd_trunc_list); + spin_unlock(&sdp->sd_trunc_lock); + wake_up(&sdp->sd_quota_wait); + return 1; + } + + return error; +} + +/** + * inode_go_dump - print information about an inode + * @seq: The iterator + * @ip: the inode + * @fs_id_buf: file system id (may be empty) + * + */ + +static void inode_go_dump(struct seq_file *seq, struct gfs2_glock *gl, + const char *fs_id_buf) +{ + struct gfs2_inode *ip = gl->gl_object; + struct inode *inode = &ip->i_inode; + unsigned long nrpages; + + if (ip == NULL) + return; + + xa_lock_irq(&inode->i_data.i_pages); + nrpages = inode->i_data.nrpages; + xa_unlock_irq(&inode->i_data.i_pages); + + 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(ip->i_inode.i_mode), ip->i_flags, + (unsigned int)ip->i_diskflags, + (unsigned long long)i_size_read(inode), nrpages); +} + +/** + * freeze_go_sync - promote/demote the freeze glock + * @gl: the glock + * @state: the requested state + * @flags: + * + */ + +static int freeze_go_sync(struct gfs2_glock *gl) +{ + int error = 0; + struct gfs2_sbd *sdp = gl->gl_name.ln_sbd; + + /* + * We need to check gl_state == LM_ST_SHARED here and not gl_req == + * LM_ST_EXCLUSIVE. That's because when any node does a freeze, + * all the nodes should have the freeze glock in SH mode and they all + * call do_xmote: One for EX and the others for UN. They ALL must + * freeze locally, and they ALL must queue freeze work. The freeze_work + * calls freeze_func, which tries to reacquire the freeze glock in SH, + * effectively waiting for the thaw on the node who holds it in EX. + * Once thawed, the work func acquires the freeze glock in + * SH and everybody goes back to thawed. + */ + if (gl->gl_state == LM_ST_SHARED && !gfs2_withdrawn(sdp) && + !test_bit(SDF_NORECOVERY, &sdp->sd_flags)) { + atomic_set(&sdp->sd_freeze_state, SFS_STARTING_FREEZE); + error = freeze_super(sdp->sd_vfs); + if (error) { + fs_info(sdp, "GFS2: couldn't freeze filesystem: %d\n", + error); + if (gfs2_withdrawn(sdp)) { + atomic_set(&sdp->sd_freeze_state, SFS_UNFROZEN); + return 0; + } + gfs2_assert_withdraw(sdp, 0); + } + queue_work(gfs2_freeze_wq, &sdp->sd_freeze_work); + if (test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) + gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_FREEZE | + GFS2_LFC_FREEZE_GO_SYNC); + else /* read-only mounts */ + atomic_set(&sdp->sd_freeze_state, SFS_FROZEN); + } + return 0; +} + +/** + * 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_holder *gh) +{ + 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; +} + +/** + * trans_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 + * + * 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)) + return; + + if (gl->gl_demote_state == LM_ST_UNLOCKED && + gl->gl_state == LM_ST_SHARED && ip) { + gl->gl_lockref.count++; + if (!queue_delayed_work(gfs2_delete_workqueue, + &gl->gl_delete, 0)) + gl->gl_lockref.count--; + } +} + +static int iopen_go_demote_ok(const struct gfs2_glock *gl) +{ + return !gfs2_delete_work_queued(gl); +} + +/** + * 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_lock = inode_go_lock, + .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_lock = gfs2_rgrp_go_lock, + .go_dump = gfs2_rgrp_go_dump, + .go_type = LM_TYPE_RGRP, + .go_flags = GLOF_LVB, +}; + +const struct gfs2_glock_operations gfs2_freeze_glops = { + .go_sync = freeze_go_sync, + .go_xmote_bh = freeze_go_xmote_bh, + .go_demote_ok = freeze_go_demote_ok, + .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_demote_ok = iopen_go_demote_ok, + .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, +}; + |