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When gfs2 withdraws a file system, it calls signal_our_withdraw which triggers another node to replay the withdrawing node's journal. Then it waits until it knows the journal has been replayed. Part of this wait is to repeatedly call check_journal_clean which calls gfs2_jdesc_check, which checks to see if the journal is sane. As part of its sanity checks it needs to re-read its journal's metadata. But with today's code, any attempt to re-read the metadata results in -EIO because of a check for the file system withdraw in function gfs2_meta_wait. This patch adds an additional check for SDF_WITHDRAW_IN_PROG, to tell if the read is done while the withdraw is in progress. In that case we allow the metadata read to not be rejected. Therefore the metadata check is done properly, so the withdraw sequence can finish normally. Signed-off-by: Bob Peterson <rpeterso@redhat.com>
234 lines
6.4 KiB
C
234 lines
6.4 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) 2004-2006 Red Hat, Inc. All rights reserved.
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*/
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#ifndef __UTIL_DOT_H__
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#define __UTIL_DOT_H__
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#ifdef pr_fmt
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#undef pr_fmt
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#endif
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#include <linux/mempool.h>
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#include "incore.h"
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#define fs_emerg(fs, fmt, ...) \
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pr_emerg("fsid=%s: " fmt, (fs)->sd_fsname, ##__VA_ARGS__)
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#define fs_warn(fs, fmt, ...) \
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pr_warn("fsid=%s: " fmt, (fs)->sd_fsname, ##__VA_ARGS__)
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#define fs_err(fs, fmt, ...) \
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pr_err("fsid=%s: " fmt, (fs)->sd_fsname, ##__VA_ARGS__)
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#define fs_info(fs, fmt, ...) \
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pr_info("fsid=%s: " fmt, (fs)->sd_fsname, ##__VA_ARGS__)
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void gfs2_assert_i(struct gfs2_sbd *sdp);
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#define gfs2_assert(sdp, assertion) \
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do { \
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if (unlikely(!(assertion))) { \
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gfs2_assert_i(sdp); \
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BUG(); \
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} \
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} while (0)
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void gfs2_assert_withdraw_i(struct gfs2_sbd *sdp, char *assertion,
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const char *function, char *file, unsigned int line,
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bool delayed);
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#define gfs2_assert_withdraw(sdp, assertion) \
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({ \
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bool _bool = (assertion); \
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if (unlikely(!_bool)) \
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gfs2_assert_withdraw_i((sdp), #assertion, \
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__func__, __FILE__, __LINE__, false); \
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!_bool; \
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})
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#define gfs2_assert_withdraw_delayed(sdp, assertion) \
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({ \
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bool _bool = (assertion); \
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if (unlikely(!_bool)) \
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gfs2_assert_withdraw_i((sdp), #assertion, \
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__func__, __FILE__, __LINE__, true); \
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!_bool; \
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})
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void gfs2_assert_warn_i(struct gfs2_sbd *sdp, char *assertion,
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const char *function, char *file, unsigned int line);
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#define gfs2_assert_warn(sdp, assertion) \
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({ \
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bool _bool = (assertion); \
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if (unlikely(!_bool)) \
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gfs2_assert_warn_i((sdp), #assertion, \
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__func__, __FILE__, __LINE__); \
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!_bool; \
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})
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void gfs2_consist_i(struct gfs2_sbd *sdp,
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const char *function, char *file, unsigned int line);
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#define gfs2_consist(sdp) \
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gfs2_consist_i((sdp), __func__, __FILE__, __LINE__)
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void gfs2_consist_inode_i(struct gfs2_inode *ip,
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const char *function, char *file, unsigned int line);
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#define gfs2_consist_inode(ip) \
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gfs2_consist_inode_i((ip), __func__, __FILE__, __LINE__)
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void gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd,
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const char *function, char *file, unsigned int line);
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#define gfs2_consist_rgrpd(rgd) \
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gfs2_consist_rgrpd_i((rgd), __func__, __FILE__, __LINE__)
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int gfs2_meta_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
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const char *type, const char *function,
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char *file, unsigned int line);
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static inline int gfs2_meta_check(struct gfs2_sbd *sdp,
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struct buffer_head *bh)
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{
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struct gfs2_meta_header *mh = (struct gfs2_meta_header *)bh->b_data;
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u32 magic = be32_to_cpu(mh->mh_magic);
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if (unlikely(magic != GFS2_MAGIC)) {
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fs_err(sdp, "Magic number missing at %llu\n",
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(unsigned long long)bh->b_blocknr);
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return -EIO;
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}
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return 0;
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}
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int gfs2_metatype_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
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u16 type, u16 t,
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const char *function,
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char *file, unsigned int line);
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static inline int gfs2_metatype_check_i(struct gfs2_sbd *sdp,
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struct buffer_head *bh,
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u16 type,
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const char *function,
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char *file, unsigned int line)
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{
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struct gfs2_meta_header *mh = (struct gfs2_meta_header *)bh->b_data;
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u32 magic = be32_to_cpu(mh->mh_magic);
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u16 t = be32_to_cpu(mh->mh_type);
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if (unlikely(magic != GFS2_MAGIC))
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return gfs2_meta_check_ii(sdp, bh, "magic number", function,
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file, line);
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if (unlikely(t != type))
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return gfs2_metatype_check_ii(sdp, bh, type, t, function,
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file, line);
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return 0;
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}
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#define gfs2_metatype_check(sdp, bh, type) \
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gfs2_metatype_check_i((sdp), (bh), (type), __func__, __FILE__, __LINE__)
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static inline void gfs2_metatype_set(struct buffer_head *bh, u16 type,
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u16 format)
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{
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struct gfs2_meta_header *mh;
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mh = (struct gfs2_meta_header *)bh->b_data;
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mh->mh_type = cpu_to_be32(type);
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mh->mh_format = cpu_to_be32(format);
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}
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int gfs2_io_error_i(struct gfs2_sbd *sdp, const char *function,
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char *file, unsigned int line);
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extern int check_journal_clean(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd,
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bool verbose);
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extern int gfs2_freeze_lock(struct gfs2_sbd *sdp,
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struct gfs2_holder *freeze_gh, int caller_flags);
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extern void gfs2_freeze_unlock(struct gfs2_holder *freeze_gh);
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#define gfs2_io_error(sdp) \
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gfs2_io_error_i((sdp), __func__, __FILE__, __LINE__)
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void gfs2_io_error_bh_i(struct gfs2_sbd *sdp, struct buffer_head *bh,
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const char *function, char *file, unsigned int line,
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bool withdraw);
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#define gfs2_io_error_bh_wd(sdp, bh) \
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gfs2_io_error_bh_i((sdp), (bh), __func__, __FILE__, __LINE__, true)
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#define gfs2_io_error_bh(sdp, bh) \
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gfs2_io_error_bh_i((sdp), (bh), __func__, __FILE__, __LINE__, false)
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extern struct kmem_cache *gfs2_glock_cachep;
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extern struct kmem_cache *gfs2_glock_aspace_cachep;
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extern struct kmem_cache *gfs2_inode_cachep;
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extern struct kmem_cache *gfs2_bufdata_cachep;
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extern struct kmem_cache *gfs2_rgrpd_cachep;
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extern struct kmem_cache *gfs2_quotad_cachep;
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extern struct kmem_cache *gfs2_qadata_cachep;
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extern struct kmem_cache *gfs2_trans_cachep;
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extern mempool_t *gfs2_page_pool;
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extern struct workqueue_struct *gfs2_control_wq;
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static inline unsigned int gfs2_tune_get_i(struct gfs2_tune *gt,
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unsigned int *p)
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{
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unsigned int x;
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spin_lock(>->gt_spin);
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x = *p;
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spin_unlock(>->gt_spin);
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return x;
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}
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/**
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* gfs2_withdraw_delayed - withdraw as soon as possible without deadlocks
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* @sdp: the superblock
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*/
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static inline void gfs2_withdraw_delayed(struct gfs2_sbd *sdp)
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{
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set_bit(SDF_WITHDRAWING, &sdp->sd_flags);
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}
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/**
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* gfs2_withdrawn - test whether the file system is withdrawing or withdrawn
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* @sdp: the superblock
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*/
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static inline bool gfs2_withdrawn(struct gfs2_sbd *sdp)
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{
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return test_bit(SDF_WITHDRAWN, &sdp->sd_flags) ||
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test_bit(SDF_WITHDRAWING, &sdp->sd_flags);
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}
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/**
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* gfs2_withdrawing - check if a withdraw is pending
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* @sdp: the superblock
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*/
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static inline bool gfs2_withdrawing(struct gfs2_sbd *sdp)
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{
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return test_bit(SDF_WITHDRAWING, &sdp->sd_flags) &&
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!test_bit(SDF_WITHDRAWN, &sdp->sd_flags);
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}
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static inline bool gfs2_withdraw_in_prog(struct gfs2_sbd *sdp)
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{
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return test_bit(SDF_WITHDRAW_IN_PROG, &sdp->sd_flags);
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}
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#define gfs2_tune_get(sdp, field) \
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gfs2_tune_get_i(&(sdp)->sd_tune, &(sdp)->sd_tune.field)
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__printf(2, 3)
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void gfs2_lm(struct gfs2_sbd *sdp, const char *fmt, ...);
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int gfs2_withdraw(struct gfs2_sbd *sdp);
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#endif /* __UTIL_DOT_H__ */
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