123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807 |
- // 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_page->mapping, bh->b_page->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);
- }
- 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;
- 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)
- goto flush;
- __gfs2_ail_flush(gl, 0, 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);
- 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_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);
- }
- 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(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);
- }
- /**
- * 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;
- 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->i_ctime.tv_sec = be64_to_cpu(str->di_ctime);
- 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(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, 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
- */
- 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_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))
- 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_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_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_dump = inode_go_dump,
- .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,
- };
|