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c77b52c0a1
Many places in the gfs2 code queued and dequeued the freeze glock. Almost all of them acquire it in SHARED mode, and need to specify the same LM_FLAG_NOEXP and GL_EXACT flags. This patch adds common helper functions gfs2_freeze_lock and gfs2_freeze_unlock to make the code more readable, and to prepare for the next patch. Signed-off-by: Bob Peterson <rpeterso@redhat.com> Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
228 lines
6.3 KiB
C
228 lines
6.3 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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#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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