674 lines
16 KiB
C
674 lines
16 KiB
C
/*
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* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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* Copyright (C) 2004-2008 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 version 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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#include <linux/fs.h>
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#include <linux/workqueue.h>
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#include <linux/slow-work.h>
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#include <linux/dlm.h>
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#include <linux/buffer_head.h>
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#define DIO_WAIT 0x00000010
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#define DIO_METADATA 0x00000020
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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_holder;
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struct gfs2_glock;
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struct gfs2_quota_data;
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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_sbd;
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struct lm_lockops;
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typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);
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struct gfs2_log_header_host {
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u64 lh_sequence; /* Sequence number of this transaction */
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u32 lh_flags; /* GFS2_LOG_HEAD_... */
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u32 lh_tail; /* Block number of log tail */
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u32 lh_blkno;
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u32 lh_hash;
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};
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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_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_host *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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const 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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const struct gfs2_log_operations *le_ops;
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};
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#define GBF_FULL 1
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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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unsigned long bi_flags;
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u32 bi_offset;
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u32 bi_start;
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u32 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 gfs2_glock *rd_gl; /* Glock for this rgrp */
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u64 rd_addr; /* grp block disk address */
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u64 rd_data0; /* first data location */
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u32 rd_length; /* length of rgrp header in fs blocks */
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u32 rd_data; /* num of data blocks in rgrp */
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u32 rd_bitbytes; /* number of bytes in data bitmaps */
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u32 rd_free;
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u32 rd_free_clone;
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u32 rd_dinodes;
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u64 rd_igeneration;
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struct gfs2_bitmap *rd_bits;
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struct mutex rd_mutex;
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struct gfs2_log_element rd_le;
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struct gfs2_sbd *rd_sbd;
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unsigned int rd_bh_count;
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u32 rd_last_alloc;
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u32 rd_flags;
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#define GFS2_RDF_CHECK 0x10000000 /* check for unlinked inodes */
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#define GFS2_RDF_UPTODATE 0x20000000 /* rg is up to date */
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#define GFS2_RDF_ERROR 0x40000000 /* error in rg */
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#define GFS2_RDF_MASK 0xf0000000 /* mask for internal flags */
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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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union {
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struct list_head list_tr;
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u64 blkno;
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} u;
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#define bd_list_tr u.list_tr
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#define bd_blkno u.blkno
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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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/*
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* Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
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* prefix of lock_dlm_ gets awkward.
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*/
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#define GDLM_STRNAME_BYTES 25
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#define GDLM_LVB_SIZE 32
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enum {
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DFL_BLOCK_LOCKS = 0,
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};
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struct lm_lockname {
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u64 ln_number;
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unsigned int ln_type;
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};
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#define lm_name_equal(name1, name2) \
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(((name1)->ln_number == (name2)->ln_number) && \
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((name1)->ln_type == (name2)->ln_type))
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struct gfs2_glock_operations {
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void (*go_xmote_th) (struct gfs2_glock *gl);
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int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh);
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void (*go_inval) (struct gfs2_glock *gl, int flags);
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int (*go_demote_ok) (const 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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int (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl);
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void (*go_callback) (struct gfs2_glock *gl);
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const int go_type;
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const unsigned long go_min_hold_time;
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};
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enum {
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/* States */
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HIF_HOLDER = 6, /* Set for gh that "holds" the glock */
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HIF_FIRST = 7,
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HIF_WAIT = 10,
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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 pid *gh_owner_pid;
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unsigned int gh_state;
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unsigned gh_flags;
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int gh_error;
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unsigned long gh_iflags; /* HIF_... */
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unsigned long gh_ip;
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};
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enum {
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GLF_LOCK = 1,
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GLF_DEMOTE = 3,
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GLF_PENDING_DEMOTE = 4,
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GLF_DEMOTE_IN_PROGRESS = 5,
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GLF_DIRTY = 6,
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GLF_LFLUSH = 7,
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GLF_INVALIDATE_IN_PROGRESS = 8,
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GLF_REPLY_PENDING = 9,
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GLF_INITIAL = 10,
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GLF_FROZEN = 11,
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};
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struct gfs2_glock {
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struct hlist_node gl_list;
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unsigned long gl_flags; /* GLF_... */
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struct lm_lockname gl_name;
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atomic_t gl_ref;
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spinlock_t gl_spin;
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unsigned int gl_state;
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unsigned int gl_target;
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unsigned int gl_reply;
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unsigned int gl_hash;
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unsigned int gl_req;
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unsigned int gl_demote_state; /* state requested by remote node */
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unsigned long gl_demote_time; /* time of first demote request */
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struct list_head gl_holders;
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const struct gfs2_glock_operations *gl_ops;
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char gl_strname[GDLM_STRNAME_BYTES];
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struct dlm_lksb gl_lksb;
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char gl_lvb[32];
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unsigned long gl_tchange;
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void *gl_object;
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struct list_head gl_lru;
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struct gfs2_sbd *gl_sbd;
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struct inode *gl_aspace;
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struct list_head gl_ail_list;
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atomic_t gl_ail_count;
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struct delayed_work gl_work;
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struct work_struct gl_delete;
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};
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#define GFS2_MIN_LVB_SIZE 32 /* Min size of LVB that gfs2 supports */
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struct gfs2_alloc {
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/* Quota stuff */
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struct gfs2_quota_data *al_qd[2*MAXQUOTAS];
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struct gfs2_holder al_qd_ghs[2*MAXQUOTAS];
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unsigned int al_qd_num;
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u32 al_requested; /* Filled in by caller of gfs2_inplace_reserve() */
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u32 al_alloced; /* Filled in by gfs2_alloc_*() */
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/* Filled in by gfs2_inplace_reserve() */
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unsigned int al_line;
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char *al_file;
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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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};
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enum {
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GIF_INVALID = 0,
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GIF_QD_LOCKED = 1,
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GIF_SW_PAGED = 3,
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GIF_USER = 4, /* user inode, not metadata addr space */
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};
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struct gfs2_inode {
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struct inode i_inode;
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u64 i_no_addr;
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u64 i_no_formal_ino;
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u64 i_generation;
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u64 i_eattr;
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loff_t i_disksize;
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unsigned long i_flags; /* GIF_... */
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struct gfs2_glock *i_gl; /* Move into i_gh? */
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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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u64 i_goal; /* goal block for allocations */
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struct rw_semaphore i_rw_mutex;
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struct list_head i_trunc_list;
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u32 i_entries;
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u32 i_diskflags;
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u8 i_height;
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u8 i_depth;
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};
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/*
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* Since i_inode is the first element of struct gfs2_inode,
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* this is effectively a cast.
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*/
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static inline struct gfs2_inode *GFS2_I(struct inode *inode)
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{
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return container_of(inode, struct gfs2_inode, i_inode);
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}
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static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
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{
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return inode->i_sb->s_fs_info;
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}
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struct gfs2_file {
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struct mutex f_fl_mutex;
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struct gfs2_holder f_fl_gh;
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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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u64 rr_blkno;
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unsigned int rr_where;
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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_data {
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struct list_head qd_list;
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struct list_head qd_reclaim;
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atomic_t qd_count;
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u32 qd_id;
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unsigned long qd_flags; /* QDF_... */
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s64 qd_change;
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s64 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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u64 qd_sync_gen;
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unsigned long qd_last_warn;
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};
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struct gfs2_trans {
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unsigned long tr_ip;
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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_databuf_new;
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unsigned int tr_num_buf_rm;
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unsigned int tr_num_databuf_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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u64 ai_sync_gen;
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};
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struct gfs2_journal_extent {
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struct list_head extent_list;
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unsigned int lblock; /* First logical block */
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u64 dblock; /* First disk block */
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u64 blocks;
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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 list_head extent_list;
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struct slow_work jd_work;
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struct inode *jd_inode;
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unsigned long jd_flags;
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#define JDF_RECOVERY 1
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unsigned int jd_jid;
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unsigned int jd_blocks;
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};
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struct gfs2_statfs_change_host {
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s64 sc_total;
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s64 sc_free;
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s64 sc_dinodes;
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};
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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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#define GFS2_ERRORS_DEFAULT GFS2_ERRORS_WITHDRAW
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#define GFS2_ERRORS_WITHDRAW 0
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#define GFS2_ERRORS_CONTINUE 1 /* place holder for future feature */
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#define GFS2_ERRORS_RO 2 /* place holder for future feature */
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#define GFS2_ERRORS_PANIC 3
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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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unsigned int ar_spectator:1; /* Don't get a journal */
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unsigned int ar_ignore_local_fs:1; /* Ignore optimisations */
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unsigned int ar_localflocks:1; /* Let the VFS do flock|fcntl */
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unsigned int ar_localcaching:1; /* Local caching */
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unsigned int ar_debug:1; /* Oops on errors */
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unsigned int ar_upgrade:1; /* Upgrade ondisk format */
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unsigned int ar_posix_acl:1; /* Enable posix acls */
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unsigned int ar_quota:2; /* off/account/on */
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unsigned int ar_suiddir:1; /* suiddir support */
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unsigned int ar_data:2; /* ordered/writeback */
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unsigned int ar_meta:1; /* mount metafs */
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unsigned int ar_discard:1; /* discard requests */
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unsigned int ar_errors:2; /* errors=withdraw | panic */
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int ar_commit; /* Commit interval */
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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_incore_log_blocks;
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unsigned int gt_log_flush_secs;
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unsigned int gt_logd_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_quantum; /* Secs between syncs to quota file */
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unsigned int gt_new_files_jdata;
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unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
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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_statfs_quantum;
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unsigned int gt_statfs_slow;
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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_NOBARRIERS = 3,
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SDF_NORECOVERY = 4,
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};
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#define GFS2_FSNAME_LEN 256
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struct gfs2_inum_host {
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u64 no_formal_ino;
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u64 no_addr;
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};
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struct gfs2_sb_host {
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u32 sb_magic;
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u32 sb_type;
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u32 sb_format;
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u32 sb_fs_format;
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u32 sb_multihost_format;
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u32 sb_bsize;
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u32 sb_bsize_shift;
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struct gfs2_inum_host sb_master_dir;
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struct gfs2_inum_host sb_root_dir;
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char sb_lockproto[GFS2_LOCKNAME_LEN];
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char sb_locktable[GFS2_LOCKNAME_LEN];
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u8 sb_uuid[16];
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};
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/*
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* lm_mount() return values
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*
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* ls_jid - the journal ID this node should use
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* ls_first - this node is the first to mount the file system
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* ls_lockspace - lock module's context for this file system
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* ls_ops - lock module's functions
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*/
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struct lm_lockstruct {
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unsigned int ls_jid;
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unsigned int ls_first;
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unsigned int ls_first_done;
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unsigned int ls_nodir;
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const struct lm_lockops *ls_ops;
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unsigned long ls_flags;
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dlm_lockspace_t *ls_dlm;
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int ls_recover_jid_done;
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int ls_recover_jid_status;
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};
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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_host sd_sb;
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/* Constants computed on mount */
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u32 sd_fsb2bb;
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u32 sd_fsb2bb_shift;
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u32 sd_diptrs; /* Number of pointers in a dinode */
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u32 sd_inptrs; /* Number of pointers in a indirect block */
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u32 sd_jbsize; /* Size of a journaled data block */
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u32 sd_hash_bsize; /* sizeof(exhash block) */
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u32 sd_hash_bsize_shift;
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u32 sd_hash_ptrs; /* Number of pointers in a hash block */
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u32 sd_qc_per_block;
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u32 sd_max_dirres; /* Max blocks needed to add a directory entry */
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u32 sd_max_height; /* Max height of a file's metadata tree */
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u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
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u32 sd_max_jheight; /* Max height of journaled file's meta tree */
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u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1];
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struct gfs2_args sd_args; /* Mount arguments */
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struct gfs2_tune sd_tune; /* Filesystem tuning structure */
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/* Lock Stuff */
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struct lm_lockstruct sd_lockstruct;
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struct gfs2_holder sd_live_gh;
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struct gfs2_glock *sd_rename_gl;
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struct gfs2_glock *sd_trans_gl;
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/* Inode Stuff */
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struct dentry *sd_master_dir;
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struct dentry *sd_root_dir;
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struct inode *sd_jindex;
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struct inode *sd_statfs_inode;
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struct inode *sd_sc_inode;
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struct inode *sd_qc_inode;
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struct inode *sd_rindex;
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struct inode *sd_quota_inode;
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|
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/* StatFS stuff */
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spinlock_t sd_statfs_spin;
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struct gfs2_statfs_change_host sd_statfs_master;
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struct gfs2_statfs_change_host sd_statfs_local;
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|
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/* Resource group stuff */
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|
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int sd_rindex_uptodate;
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spinlock_t sd_rindex_spin;
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struct mutex sd_rindex_mutex;
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struct list_head sd_rindex_list;
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struct list_head sd_rindex_mru_list;
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struct gfs2_rgrpd *sd_rindex_forward;
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unsigned int sd_rgrps;
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|
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/* Journal index stuff */
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|
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struct list_head sd_jindex_list;
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spinlock_t sd_jindex_spin;
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struct mutex sd_jindex_mutex;
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unsigned int sd_journals;
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|
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struct gfs2_jdesc *sd_jdesc;
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struct gfs2_holder sd_journal_gh;
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struct gfs2_holder sd_jinode_gh;
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|
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struct gfs2_holder sd_sc_gh;
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struct gfs2_holder sd_qc_gh;
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|
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/* Daemon stuff */
|
|
|
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struct task_struct *sd_logd_process;
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struct task_struct *sd_quotad_process;
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|
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/* Quota stuff */
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|
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struct list_head sd_quota_list;
|
|
atomic_t sd_quota_count;
|
|
struct mutex sd_quota_mutex;
|
|
wait_queue_head_t sd_quota_wait;
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|
struct list_head sd_trunc_list;
|
|
spinlock_t sd_trunc_lock;
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|
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unsigned int sd_quota_slots;
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|
unsigned int sd_quota_chunks;
|
|
unsigned char **sd_quota_bitmap;
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|
|
|
u64 sd_quota_sync_gen;
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|
|
|
/* Log stuff */
|
|
|
|
spinlock_t sd_log_lock;
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|
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unsigned int sd_log_blks_reserved;
|
|
unsigned int sd_log_commited_buf;
|
|
unsigned int sd_log_commited_databuf;
|
|
unsigned int sd_log_commited_revoke;
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|
|
unsigned int sd_log_num_buf;
|
|
unsigned int sd_log_num_revoke;
|
|
unsigned int sd_log_num_rg;
|
|
unsigned int sd_log_num_databuf;
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|
|
|
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;
|
|
struct list_head sd_log_le_ordered;
|
|
|
|
atomic_t sd_log_blks_free;
|
|
struct mutex sd_log_reserve_mutex;
|
|
|
|
u64 sd_log_sequence;
|
|
unsigned int sd_log_head;
|
|
unsigned int sd_log_tail;
|
|
int sd_log_idle;
|
|
|
|
unsigned long sd_log_flush_time;
|
|
struct rw_semaphore sd_log_flush_lock;
|
|
atomic_t sd_log_in_flight;
|
|
wait_queue_head_t sd_log_flush_wait;
|
|
|
|
unsigned int sd_log_flush_head;
|
|
u64 sd_log_flush_wrapped;
|
|
|
|
struct list_head sd_ail1_list;
|
|
struct list_head sd_ail2_list;
|
|
u64 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;
|
|
|
|
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;
|
|
struct dentry *debugfs_dir; /* debugfs directory */
|
|
struct dentry *debugfs_dentry_glocks; /* for debugfs */
|
|
};
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#endif /* __INCORE_DOT_H__ */
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