484adff8a0
Replace the lock_for_trans()/lock_for_flush() functions with an rwsem. In fact the sd_log_flush_lock becomes an rwsem (the write part of it) and is extended slightly to cover everything that the lock_for_flush() used to cover. The read part of the lock is instead of lock_for_trans(). This corrects the races in the original code and reduces the code size. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
684 lines
16 KiB
C
684 lines
16 KiB
C
/*
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* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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* Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU General Public License v.2.
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*/
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#ifndef __INCORE_DOT_H__
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#define __INCORE_DOT_H__
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#define DIO_FORCE 0x00000001
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#define DIO_CLEAN 0x00000002
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#define DIO_DIRTY 0x00000004
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#define DIO_START 0x00000008
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#define DIO_WAIT 0x00000010
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#define DIO_METADATA 0x00000020
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#define DIO_DATA 0x00000040
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#define DIO_RELEASE 0x00000080
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#define DIO_ALL 0x00000100
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struct gfs2_log_operations;
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struct gfs2_log_element;
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struct gfs2_bitmap;
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struct gfs2_rgrpd;
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struct gfs2_bufdata;
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struct gfs2_glock_operations;
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struct gfs2_holder;
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struct gfs2_glock;
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struct gfs2_alloc;
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struct gfs2_inode;
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struct gfs2_file;
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struct gfs2_revoke;
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struct gfs2_revoke_replay;
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struct gfs2_unlinked;
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struct gfs2_quota_data;
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struct gfs2_log_buf;
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struct gfs2_trans;
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struct gfs2_ail;
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struct gfs2_jdesc;
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struct gfs2_args;
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struct gfs2_tune;
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struct gfs2_gl_hash_bucket;
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struct gfs2_sbd;
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typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);
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/*
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* Structure of operations that are associated with each
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* type of element in the log.
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*/
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struct gfs2_log_operations {
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void (*lo_add) (struct gfs2_sbd *sdp, struct gfs2_log_element *le);
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void (*lo_incore_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr);
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void (*lo_before_commit) (struct gfs2_sbd *sdp);
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void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_ail *ai);
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void (*lo_before_scan) (struct gfs2_jdesc *jd,
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struct gfs2_log_header *head, int pass);
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int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start,
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struct gfs2_log_descriptor *ld, __be64 *ptr,
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int pass);
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void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass);
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char *lo_name;
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};
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struct gfs2_log_element {
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struct list_head le_list;
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struct gfs2_log_operations *le_ops;
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};
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struct gfs2_bitmap {
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struct buffer_head *bi_bh;
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char *bi_clone;
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uint32_t bi_offset;
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uint32_t bi_start;
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uint32_t bi_len;
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};
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struct gfs2_rgrpd {
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struct list_head rd_list; /* Link with superblock */
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struct list_head rd_list_mru;
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struct list_head rd_recent; /* Recently used rgrps */
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struct gfs2_glock *rd_gl; /* Glock for this rgrp */
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struct gfs2_rindex rd_ri;
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struct gfs2_rgrp rd_rg;
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uint64_t rd_rg_vn;
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struct gfs2_bitmap *rd_bits;
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unsigned int rd_bh_count;
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struct mutex rd_mutex;
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uint32_t rd_free_clone;
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struct gfs2_log_element rd_le;
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uint32_t rd_last_alloc_data;
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uint32_t rd_last_alloc_meta;
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struct gfs2_sbd *rd_sbd;
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};
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enum gfs2_state_bits {
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BH_Pinned = BH_PrivateStart,
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BH_Escaped = BH_PrivateStart + 1,
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};
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BUFFER_FNS(Pinned, pinned)
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TAS_BUFFER_FNS(Pinned, pinned)
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BUFFER_FNS(Escaped, escaped)
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TAS_BUFFER_FNS(Escaped, escaped)
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struct gfs2_bufdata {
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struct buffer_head *bd_bh;
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struct gfs2_glock *bd_gl;
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struct list_head bd_list_tr;
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struct gfs2_log_element bd_le;
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struct gfs2_ail *bd_ail;
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struct list_head bd_ail_st_list;
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struct list_head bd_ail_gl_list;
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};
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struct gfs2_glock_operations {
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void (*go_xmote_th) (struct gfs2_glock * gl, unsigned int state,
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int flags);
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void (*go_xmote_bh) (struct gfs2_glock * gl);
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void (*go_drop_th) (struct gfs2_glock * gl);
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void (*go_drop_bh) (struct gfs2_glock * gl);
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void (*go_sync) (struct gfs2_glock * gl, int flags);
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void (*go_inval) (struct gfs2_glock * gl, int flags);
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int (*go_demote_ok) (struct gfs2_glock * gl);
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int (*go_lock) (struct gfs2_holder * gh);
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void (*go_unlock) (struct gfs2_holder * gh);
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void (*go_callback) (struct gfs2_glock * gl, unsigned int state);
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void (*go_greedy) (struct gfs2_glock * gl);
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int go_type;
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};
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enum {
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/* Actions */
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HIF_MUTEX = 0,
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HIF_PROMOTE = 1,
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HIF_DEMOTE = 2,
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HIF_GREEDY = 3,
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/* States */
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HIF_ALLOCED = 4,
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HIF_DEALLOC = 5,
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HIF_HOLDER = 6,
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HIF_FIRST = 7,
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HIF_RECURSE = 8,
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HIF_ABORTED = 9,
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};
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struct gfs2_holder {
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struct list_head gh_list;
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struct gfs2_glock *gh_gl;
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struct task_struct *gh_owner;
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unsigned int gh_state;
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int gh_flags;
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int gh_error;
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unsigned long gh_iflags;
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struct completion gh_wait;
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};
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enum {
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GLF_PLUG = 0,
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GLF_LOCK = 1,
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GLF_STICKY = 2,
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GLF_PREFETCH = 3,
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GLF_SYNC = 4,
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GLF_DIRTY = 5,
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GLF_SKIP_WAITERS2 = 6,
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GLF_GREEDY = 7,
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};
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struct gfs2_glock {
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struct list_head gl_list;
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unsigned long gl_flags; /* GLF_... */
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struct lm_lockname gl_name;
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struct kref gl_ref;
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spinlock_t gl_spin;
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unsigned int gl_state;
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struct list_head gl_holders;
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struct list_head gl_waiters1; /* HIF_MUTEX */
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struct list_head gl_waiters2; /* HIF_DEMOTE, HIF_GREEDY */
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struct list_head gl_waiters3; /* HIF_PROMOTE */
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struct gfs2_glock_operations *gl_ops;
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struct gfs2_holder *gl_req_gh;
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gfs2_glop_bh_t gl_req_bh;
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lm_lock_t *gl_lock;
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char *gl_lvb;
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atomic_t gl_lvb_count;
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uint64_t gl_vn;
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unsigned long gl_stamp;
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void *gl_object;
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struct gfs2_gl_hash_bucket *gl_bucket;
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struct list_head gl_reclaim;
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struct gfs2_sbd *gl_sbd;
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struct inode *gl_aspace;
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struct gfs2_log_element gl_le;
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struct list_head gl_ail_list;
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atomic_t gl_ail_count;
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};
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struct gfs2_alloc {
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/* Quota stuff */
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unsigned int al_qd_num;
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struct gfs2_quota_data *al_qd[4];
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struct gfs2_holder al_qd_ghs[4];
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/* Filled in by the caller to gfs2_inplace_reserve() */
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uint32_t al_requested;
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/* Filled in by gfs2_inplace_reserve() */
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char *al_file;
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unsigned int al_line;
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struct gfs2_holder al_ri_gh;
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struct gfs2_holder al_rgd_gh;
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struct gfs2_rgrpd *al_rgd;
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/* Filled in by gfs2_alloc_*() */
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uint32_t al_alloced;
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};
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enum {
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GIF_MIN_INIT = 0,
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GIF_QD_LOCKED = 1,
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GIF_PAGED = 2,
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GIF_SW_PAGED = 3,
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};
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struct gfs2_inode {
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struct gfs2_inum i_num;
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atomic_t i_count;
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unsigned long i_flags; /* GIF_... */
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uint64_t i_vn;
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struct gfs2_dinode i_di;
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struct gfs2_glock *i_gl;
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struct gfs2_sbd *i_sbd;
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struct inode *i_vnode;
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struct gfs2_holder i_iopen_gh;
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struct gfs2_holder i_gh; /* for prepare/commit_write only */
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struct gfs2_alloc i_alloc;
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uint64_t i_last_rg_alloc;
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spinlock_t i_spin;
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struct rw_semaphore i_rw_mutex;
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unsigned int i_greedy;
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unsigned long i_last_pfault;
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struct buffer_head *i_cache[GFS2_MAX_META_HEIGHT];
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};
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enum {
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GFF_DID_DIRECT_ALLOC = 0,
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};
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struct gfs2_file {
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unsigned long f_flags; /* GFF_... */
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struct mutex f_fl_mutex;
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struct gfs2_holder f_fl_gh;
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struct gfs2_inode *f_inode;
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struct file *f_vfile;
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};
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struct gfs2_revoke {
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struct gfs2_log_element rv_le;
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uint64_t rv_blkno;
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};
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struct gfs2_revoke_replay {
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struct list_head rr_list;
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uint64_t rr_blkno;
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unsigned int rr_where;
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};
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enum {
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ULF_LOCKED = 0,
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};
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struct gfs2_unlinked {
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struct list_head ul_list;
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unsigned int ul_count;
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struct gfs2_unlinked_tag ul_ut;
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unsigned long ul_flags; /* ULF_... */
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unsigned int ul_slot;
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};
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enum {
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QDF_USER = 0,
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QDF_CHANGE = 1,
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QDF_LOCKED = 2,
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};
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struct gfs2_quota_lvb {
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uint32_t qb_magic;
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uint32_t __pad;
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uint64_t qb_limit; /* Hard limit of # blocks to alloc */
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uint64_t qb_warn; /* Warn user when alloc is above this # */
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int64_t qb_value; /* Current # blocks allocated */
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};
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struct gfs2_quota_data {
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struct list_head qd_list;
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unsigned int qd_count;
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uint32_t qd_id;
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unsigned long qd_flags; /* QDF_... */
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int64_t qd_change;
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int64_t qd_change_sync;
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unsigned int qd_slot;
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unsigned int qd_slot_count;
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struct buffer_head *qd_bh;
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struct gfs2_quota_change *qd_bh_qc;
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unsigned int qd_bh_count;
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struct gfs2_glock *qd_gl;
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struct gfs2_quota_lvb qd_qb;
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uint64_t qd_sync_gen;
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unsigned long qd_last_warn;
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unsigned long qd_last_touched;
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};
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struct gfs2_log_buf {
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struct list_head lb_list;
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struct buffer_head *lb_bh;
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struct buffer_head *lb_real;
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};
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struct gfs2_trans {
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char *tr_file;
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unsigned int tr_line;
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unsigned int tr_blocks;
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unsigned int tr_revokes;
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unsigned int tr_reserved;
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struct gfs2_holder tr_t_gh;
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int tr_touched;
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unsigned int tr_num_buf;
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unsigned int tr_num_buf_new;
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unsigned int tr_num_buf_rm;
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struct list_head tr_list_buf;
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unsigned int tr_num_revoke;
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unsigned int tr_num_revoke_rm;
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};
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struct gfs2_ail {
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struct list_head ai_list;
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unsigned int ai_first;
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struct list_head ai_ail1_list;
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struct list_head ai_ail2_list;
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uint64_t ai_sync_gen;
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};
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struct gfs2_jdesc {
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struct list_head jd_list;
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struct inode *jd_inode;
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unsigned int jd_jid;
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int jd_dirty;
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unsigned int jd_blocks;
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};
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#define GFS2_GLOCKD_DEFAULT 1
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#define GFS2_GLOCKD_MAX 16
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#define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF
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#define GFS2_QUOTA_OFF 0
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#define GFS2_QUOTA_ACCOUNT 1
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#define GFS2_QUOTA_ON 2
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#define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED
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#define GFS2_DATA_WRITEBACK 1
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#define GFS2_DATA_ORDERED 2
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struct gfs2_args {
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char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
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char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
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char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
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int ar_spectator; /* Don't get a journal because we're always RO */
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int ar_ignore_local_fs; /* Don't optimize even if local_fs is 1 */
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int ar_localflocks; /* Let the VFS do flock|fcntl locks for us */
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int ar_localcaching; /* Local-style caching (dangerous on multihost) */
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int ar_debug; /* Oops on errors instead of trying to be graceful */
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int ar_upgrade; /* Upgrade ondisk/multihost format */
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unsigned int ar_num_glockd; /* Number of glockd threads */
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int ar_posix_acl; /* Enable posix acls */
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int ar_quota; /* off/account/on */
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int ar_suiddir; /* suiddir support */
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int ar_data; /* ordered/writeback */
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};
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struct gfs2_tune {
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spinlock_t gt_spin;
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unsigned int gt_ilimit;
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unsigned int gt_ilimit_tries;
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unsigned int gt_ilimit_min;
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unsigned int gt_demote_secs; /* Cache retention for unheld glock */
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unsigned int gt_incore_log_blocks;
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unsigned int gt_log_flush_secs;
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unsigned int gt_jindex_refresh_secs; /* Check for new journal index */
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unsigned int gt_scand_secs;
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unsigned int gt_recoverd_secs;
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unsigned int gt_logd_secs;
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unsigned int gt_quotad_secs;
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unsigned int gt_inoded_secs;
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unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
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unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
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unsigned int gt_quota_scale_num; /* Numerator */
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unsigned int gt_quota_scale_den; /* Denominator */
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unsigned int gt_quota_cache_secs;
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unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
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unsigned int gt_atime_quantum; /* Min secs between atime updates */
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unsigned int gt_new_files_jdata;
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unsigned int gt_new_files_directio;
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unsigned int gt_max_atomic_write; /* Split big writes into this size */
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unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
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unsigned int gt_lockdump_size;
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unsigned int gt_stall_secs; /* Detects trouble! */
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unsigned int gt_complain_secs;
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unsigned int gt_reclaim_limit; /* Max num of glocks in reclaim list */
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unsigned int gt_entries_per_readdir;
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unsigned int gt_prefetch_secs; /* Usage window for prefetched glocks */
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unsigned int gt_greedy_default;
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unsigned int gt_greedy_quantum;
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unsigned int gt_greedy_max;
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unsigned int gt_statfs_quantum;
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unsigned int gt_statfs_slow;
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};
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struct gfs2_gl_hash_bucket {
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rwlock_t hb_lock;
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struct list_head hb_list;
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};
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enum {
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SDF_JOURNAL_CHECKED = 0,
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SDF_JOURNAL_LIVE = 1,
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SDF_SHUTDOWN = 2,
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SDF_NOATIME = 3,
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};
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#define GFS2_GL_HASH_SHIFT 13
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#define GFS2_GL_HASH_SIZE (1 << GFS2_GL_HASH_SHIFT)
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#define GFS2_GL_HASH_MASK (GFS2_GL_HASH_SIZE - 1)
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#define GFS2_FSNAME_LEN 256
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struct gfs2_sbd {
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struct super_block *sd_vfs;
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struct kobject sd_kobj;
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unsigned long sd_flags; /* SDF_... */
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struct gfs2_sb sd_sb;
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/* Constants computed on mount */
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uint32_t sd_fsb2bb;
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uint32_t sd_fsb2bb_shift;
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uint32_t sd_diptrs; /* Number of pointers in a dinode */
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uint32_t sd_inptrs; /* Number of pointers in a indirect block */
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uint32_t sd_jbsize; /* Size of a journaled data block */
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uint32_t sd_hash_bsize; /* sizeof(exhash block) */
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uint32_t sd_hash_bsize_shift;
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uint32_t sd_hash_ptrs; /* Number of pointers in a hash block */
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uint32_t sd_ut_per_block;
|
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uint32_t sd_qc_per_block;
|
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uint32_t sd_max_dirres; /* Max blocks needed to add a directory entry */
|
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uint32_t sd_max_height; /* Max height of a file's metadata tree */
|
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uint64_t sd_heightsize[GFS2_MAX_META_HEIGHT];
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uint32_t sd_max_jheight; /* Max height of journaled file's meta tree */
|
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uint64_t sd_jheightsize[GFS2_MAX_META_HEIGHT];
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|
|
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struct gfs2_args sd_args; /* Mount arguments */
|
|
struct gfs2_tune sd_tune; /* Filesystem tuning structure */
|
|
|
|
/* Lock Stuff */
|
|
|
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struct lm_lockstruct sd_lockstruct;
|
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struct gfs2_gl_hash_bucket sd_gl_hash[GFS2_GL_HASH_SIZE];
|
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struct list_head sd_reclaim_list;
|
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spinlock_t sd_reclaim_lock;
|
|
wait_queue_head_t sd_reclaim_wq;
|
|
atomic_t sd_reclaim_count;
|
|
struct gfs2_holder sd_live_gh;
|
|
struct gfs2_glock *sd_rename_gl;
|
|
struct gfs2_glock *sd_trans_gl;
|
|
struct mutex sd_invalidate_inodes_mutex;
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|
|
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/* Inode Stuff */
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|
|
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struct inode *sd_master_dir;
|
|
struct inode *sd_jindex;
|
|
struct inode *sd_inum_inode;
|
|
struct inode *sd_statfs_inode;
|
|
struct inode *sd_ir_inode;
|
|
struct inode *sd_sc_inode;
|
|
struct inode *sd_ut_inode;
|
|
struct inode *sd_qc_inode;
|
|
struct inode *sd_rindex;
|
|
struct inode *sd_quota_inode;
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|
|
|
/* Inum stuff */
|
|
|
|
struct mutex sd_inum_mutex;
|
|
|
|
/* StatFS stuff */
|
|
|
|
spinlock_t sd_statfs_spin;
|
|
struct mutex sd_statfs_mutex;
|
|
struct gfs2_statfs_change sd_statfs_master;
|
|
struct gfs2_statfs_change sd_statfs_local;
|
|
unsigned long sd_statfs_sync_time;
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|
|
|
/* Resource group stuff */
|
|
|
|
uint64_t sd_rindex_vn;
|
|
spinlock_t sd_rindex_spin;
|
|
struct mutex sd_rindex_mutex;
|
|
struct list_head sd_rindex_list;
|
|
struct list_head sd_rindex_mru_list;
|
|
struct list_head sd_rindex_recent_list;
|
|
struct gfs2_rgrpd *sd_rindex_forward;
|
|
unsigned int sd_rgrps;
|
|
|
|
/* Journal index stuff */
|
|
|
|
struct list_head sd_jindex_list;
|
|
spinlock_t sd_jindex_spin;
|
|
struct mutex sd_jindex_mutex;
|
|
unsigned int sd_journals;
|
|
unsigned long sd_jindex_refresh_time;
|
|
|
|
struct gfs2_jdesc *sd_jdesc;
|
|
struct gfs2_holder sd_journal_gh;
|
|
struct gfs2_holder sd_jinode_gh;
|
|
|
|
struct gfs2_holder sd_ir_gh;
|
|
struct gfs2_holder sd_sc_gh;
|
|
struct gfs2_holder sd_ut_gh;
|
|
struct gfs2_holder sd_qc_gh;
|
|
|
|
/* Daemon stuff */
|
|
|
|
struct task_struct *sd_scand_process;
|
|
struct task_struct *sd_recoverd_process;
|
|
struct task_struct *sd_logd_process;
|
|
struct task_struct *sd_quotad_process;
|
|
struct task_struct *sd_inoded_process;
|
|
struct task_struct *sd_glockd_process[GFS2_GLOCKD_MAX];
|
|
unsigned int sd_glockd_num;
|
|
|
|
/* Unlinked inode stuff */
|
|
|
|
struct list_head sd_unlinked_list;
|
|
atomic_t sd_unlinked_count;
|
|
spinlock_t sd_unlinked_spin;
|
|
struct mutex sd_unlinked_mutex;
|
|
|
|
unsigned int sd_unlinked_slots;
|
|
unsigned int sd_unlinked_chunks;
|
|
unsigned char **sd_unlinked_bitmap;
|
|
|
|
/* Quota stuff */
|
|
|
|
struct list_head sd_quota_list;
|
|
atomic_t sd_quota_count;
|
|
spinlock_t sd_quota_spin;
|
|
struct mutex sd_quota_mutex;
|
|
|
|
unsigned int sd_quota_slots;
|
|
unsigned int sd_quota_chunks;
|
|
unsigned char **sd_quota_bitmap;
|
|
|
|
uint64_t sd_quota_sync_gen;
|
|
unsigned long sd_quota_sync_time;
|
|
|
|
/* Log stuff */
|
|
|
|
spinlock_t sd_log_lock;
|
|
|
|
unsigned int sd_log_blks_reserved;
|
|
unsigned int sd_log_commited_buf;
|
|
unsigned int sd_log_commited_revoke;
|
|
|
|
unsigned int sd_log_num_gl;
|
|
unsigned int sd_log_num_buf;
|
|
unsigned int sd_log_num_revoke;
|
|
unsigned int sd_log_num_rg;
|
|
unsigned int sd_log_num_databuf;
|
|
unsigned int sd_log_num_jdata;
|
|
|
|
struct list_head sd_log_le_gl;
|
|
struct list_head sd_log_le_buf;
|
|
struct list_head sd_log_le_revoke;
|
|
struct list_head sd_log_le_rg;
|
|
struct list_head sd_log_le_databuf;
|
|
|
|
unsigned int sd_log_blks_free;
|
|
struct mutex sd_log_reserve_mutex;
|
|
|
|
uint64_t sd_log_sequence;
|
|
unsigned int sd_log_head;
|
|
unsigned int sd_log_tail;
|
|
uint64_t sd_log_wraps;
|
|
int sd_log_idle;
|
|
|
|
unsigned long sd_log_flush_time;
|
|
struct rw_semaphore sd_log_flush_lock;
|
|
struct list_head sd_log_flush_list;
|
|
|
|
unsigned int sd_log_flush_head;
|
|
uint64_t sd_log_flush_wrapped;
|
|
|
|
struct list_head sd_ail1_list;
|
|
struct list_head sd_ail2_list;
|
|
uint64_t sd_ail_sync_gen;
|
|
|
|
/* Replay stuff */
|
|
|
|
struct list_head sd_revoke_list;
|
|
unsigned int sd_replay_tail;
|
|
|
|
unsigned int sd_found_blocks;
|
|
unsigned int sd_found_revokes;
|
|
unsigned int sd_replayed_blocks;
|
|
|
|
/* For quiescing the filesystem */
|
|
|
|
struct gfs2_holder sd_freeze_gh;
|
|
struct mutex sd_freeze_lock;
|
|
unsigned int sd_freeze_count;
|
|
|
|
/* Counters */
|
|
|
|
atomic_t sd_glock_count;
|
|
atomic_t sd_glock_held_count;
|
|
atomic_t sd_inode_count;
|
|
atomic_t sd_reclaimed;
|
|
|
|
char sd_fsname[GFS2_FSNAME_LEN];
|
|
char sd_table_name[GFS2_FSNAME_LEN];
|
|
char sd_proto_name[GFS2_FSNAME_LEN];
|
|
|
|
/* Debugging crud */
|
|
|
|
unsigned long sd_last_warning;
|
|
};
|
|
|
|
#endif /* __INCORE_DOT_H__ */
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|
|