Commit e6631f85 authored by Dave Chinner's avatar Dave Chinner Committed by Darrick J. Wong

xfs: get rid of the log item descriptor

It's just a connector between a transaction and a log item. There's
a 1:1 relationship between a log item descriptor and a log item,
and a 1:1 relationship between a log item descriptor and a
transaction. Both relationships are created and terminated at the
same time, so why do we even have the descriptor?

Replace it with a specific list_head in the log item and a new
log item dirtied flag to replace the XFS_LID_DIRTY flag.
Signed-Off-By: default avatarDave Chinner <dchinner@redhat.com>
Reviewed-by: default avatarBrian Foster <bfoster@redhat.com>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
[darrick: fix up deferred agfl intent finish_item use of LID_DIRTY]
Reviewed-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
parent 1a2ebf83
......@@ -246,7 +246,7 @@ xfs_bmap_get_bp(
struct xfs_btree_cur *cur,
xfs_fsblock_t bno)
{
struct xfs_log_item_desc *lidp;
struct xfs_log_item *lip;
int i;
if (!cur)
......@@ -260,9 +260,9 @@ xfs_bmap_get_bp(
}
/* Chase down all the log items to see if the bp is there */
list_for_each_entry(lidp, &cur->bc_tp->t_items, lid_trans) {
struct xfs_buf_log_item *bip;
bip = (struct xfs_buf_log_item *)lidp->lid_item;
list_for_each_entry(lip, &cur->bc_tp->t_items, li_trans) {
struct xfs_buf_log_item *bip = (struct xfs_buf_log_item *)lip;
if (bip->bli_item.li_type == XFS_LI_BUF &&
XFS_BUF_ADDR(bip->bli_buf) == bno)
return bip->bli_buf;
......
......@@ -57,21 +57,6 @@ extern const struct xfs_buf_ops xfs_sb_quiet_buf_ops;
extern const struct xfs_buf_ops xfs_symlink_buf_ops;
extern const struct xfs_buf_ops xfs_rtbuf_ops;
/*
* This structure is used to track log items associated with
* a transaction. It points to the log item and keeps some
* flags to track the state of the log item. It also tracks
* the amount of space needed to log the item it describes
* once we get to commit processing (see xfs_trans_commit()).
*/
struct xfs_log_item_desc {
struct xfs_log_item *lid_item;
struct list_head lid_trans;
unsigned char lid_flags;
};
#define XFS_LID_DIRTY 0x1
/* log size calculation functions */
int xfs_log_calc_unit_res(struct xfs_mount *mp, int unit_bytes);
int xfs_log_calc_minimum_size(struct xfs_mount *);
......
......@@ -438,7 +438,7 @@ xfs_buf_item_unpin(
* xfs_trans_uncommit() will try to reference the
* buffer which we no longer have a hold on.
*/
if (lip->li_desc)
if (!list_empty(&lip->li_trans))
xfs_trans_del_item(lip);
/*
......
......@@ -184,5 +184,5 @@ xfs_icreate_log(
xfs_trans_add_item(tp, &icp->ic_item);
tp->t_flags |= XFS_TRANS_DIRTY;
icp->ic_item.li_desc->lid_flags |= XFS_LID_DIRTY;
set_bit(XFS_LI_DIRTY, &icp->ic_item.li_flags);
}
......@@ -1047,6 +1047,7 @@ xfs_log_item_init(
INIT_LIST_HEAD(&item->li_ail);
INIT_LIST_HEAD(&item->li_cil);
INIT_LIST_HEAD(&item->li_bio_list);
INIT_LIST_HEAD(&item->li_trans);
}
/*
......@@ -2113,7 +2114,7 @@ xlog_print_trans(
struct xfs_trans *tp)
{
struct xfs_mount *mp = tp->t_mountp;
struct xfs_log_item_desc *lidp;
struct xfs_log_item *lip;
/* dump core transaction and ticket info */
xfs_warn(mp, "transaction summary:");
......@@ -2124,8 +2125,7 @@ xlog_print_trans(
xlog_print_tic_res(mp, tp->t_ticket);
/* dump each log item */
list_for_each_entry(lidp, &tp->t_items, lid_trans) {
struct xfs_log_item *lip = lidp->lid_item;
list_for_each_entry(lip, &tp->t_items, li_trans) {
struct xfs_log_vec *lv = lip->li_lv;
struct xfs_log_iovec *vec;
int i;
......
......@@ -141,10 +141,9 @@ xlog_cil_alloc_shadow_bufs(
struct xlog *log,
struct xfs_trans *tp)
{
struct xfs_log_item_desc *lidp;
struct xfs_log_item *lip;
list_for_each_entry(lidp, &tp->t_items, lid_trans) {
struct xfs_log_item *lip = lidp->lid_item;
list_for_each_entry(lip, &tp->t_items, li_trans) {
struct xfs_log_vec *lv;
int niovecs = 0;
int nbytes = 0;
......@@ -152,7 +151,7 @@ xlog_cil_alloc_shadow_bufs(
bool ordered = false;
/* Skip items which aren't dirty in this transaction. */
if (!(lidp->lid_flags & XFS_LID_DIRTY))
if (!test_bit(XFS_LI_DIRTY, &lip->li_flags))
continue;
/* get number of vecs and size of data to be stored */
......@@ -317,7 +316,7 @@ xlog_cil_insert_format_items(
int *diff_len,
int *diff_iovecs)
{
struct xfs_log_item_desc *lidp;
struct xfs_log_item *lip;
/* Bail out if we didn't find a log item. */
......@@ -326,15 +325,14 @@ xlog_cil_insert_format_items(
return;
}
list_for_each_entry(lidp, &tp->t_items, lid_trans) {
struct xfs_log_item *lip = lidp->lid_item;
list_for_each_entry(lip, &tp->t_items, li_trans) {
struct xfs_log_vec *lv;
struct xfs_log_vec *old_lv = NULL;
struct xfs_log_vec *shadow;
bool ordered = false;
/* Skip items which aren't dirty in this transaction. */
if (!(lidp->lid_flags & XFS_LID_DIRTY))
if (!test_bit(XFS_LI_DIRTY, &lip->li_flags))
continue;
/*
......@@ -406,7 +404,7 @@ xlog_cil_insert_items(
{
struct xfs_cil *cil = log->l_cilp;
struct xfs_cil_ctx *ctx = cil->xc_ctx;
struct xfs_log_item_desc *lidp;
struct xfs_log_item *lip;
int len = 0;
int diff_iovecs = 0;
int iclog_space;
......@@ -479,11 +477,10 @@ xlog_cil_insert_items(
* We do this here so we only need to take the CIL lock once during
* the transaction commit.
*/
list_for_each_entry(lidp, &tp->t_items, lid_trans) {
struct xfs_log_item *lip = lidp->lid_item;
list_for_each_entry(lip, &tp->t_items, li_trans) {
/* Skip items which aren't dirty in this transaction. */
if (!(lidp->lid_flags & XFS_LID_DIRTY))
if (!test_bit(XFS_LI_DIRTY, &lip->li_flags))
continue;
/*
......
......@@ -1880,11 +1880,6 @@ xfs_init_zones(void)
if (!xfs_trans_zone)
goto out_destroy_ifork_zone;
xfs_log_item_desc_zone =
kmem_zone_init(sizeof(struct xfs_log_item_desc),
"xfs_log_item_desc");
if (!xfs_log_item_desc_zone)
goto out_destroy_trans_zone;
/*
* The size of the zone allocated buf log item is the maximum
......@@ -1894,7 +1889,7 @@ xfs_init_zones(void)
xfs_buf_item_zone = kmem_zone_init(sizeof(struct xfs_buf_log_item),
"xfs_buf_item");
if (!xfs_buf_item_zone)
goto out_destroy_log_item_desc_zone;
goto out_destroy_trans_zone;
xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) +
((XFS_EFD_MAX_FAST_EXTENTS - 1) *
......@@ -1982,8 +1977,6 @@ xfs_init_zones(void)
kmem_zone_destroy(xfs_efd_zone);
out_destroy_buf_item_zone:
kmem_zone_destroy(xfs_buf_item_zone);
out_destroy_log_item_desc_zone:
kmem_zone_destroy(xfs_log_item_desc_zone);
out_destroy_trans_zone:
kmem_zone_destroy(xfs_trans_zone);
out_destroy_ifork_zone:
......@@ -2022,7 +2015,6 @@ xfs_destroy_zones(void)
kmem_zone_destroy(xfs_efi_zone);
kmem_zone_destroy(xfs_efd_zone);
kmem_zone_destroy(xfs_buf_item_zone);
kmem_zone_destroy(xfs_log_item_desc_zone);
kmem_zone_destroy(xfs_trans_zone);
kmem_zone_destroy(xfs_ifork_zone);
kmem_zone_destroy(xfs_da_state_zone);
......
......@@ -441,7 +441,6 @@ DECLARE_EVENT_CLASS(xfs_buf_item_class,
__field(unsigned, bli_recur)
__field(int, bli_refcount)
__field(unsigned, bli_flags)
__field(void *, li_desc)
__field(unsigned long, li_flags)
),
TP_fast_assign(
......@@ -455,12 +454,11 @@ DECLARE_EVENT_CLASS(xfs_buf_item_class,
__entry->buf_hold = atomic_read(&bip->bli_buf->b_hold);
__entry->buf_pincount = atomic_read(&bip->bli_buf->b_pin_count);
__entry->buf_lockval = bip->bli_buf->b_sema.count;
__entry->li_desc = bip->bli_item.li_desc;
__entry->li_flags = bip->bli_item.li_flags;
),
TP_printk("dev %d:%d bno 0x%llx len 0x%zx hold %d pincount %d "
"lock %d flags %s recur %d refcount %d bliflags %s "
"lidesc %p liflags %s",
"liflags %s",
MAJOR(__entry->dev), MINOR(__entry->dev),
(unsigned long long)__entry->buf_bno,
__entry->buf_len,
......@@ -471,7 +469,6 @@ DECLARE_EVENT_CLASS(xfs_buf_item_class,
__entry->bli_recur,
__entry->bli_refcount,
__print_flags(__entry->bli_flags, "|", XFS_BLI_FLAGS),
__entry->li_desc,
__print_flags(__entry->li_flags, "|", XFS_LI_FLAGS))
)
......
......@@ -34,7 +34,6 @@
#include "xfs_defer.h"
kmem_zone_t *xfs_trans_zone;
kmem_zone_t *xfs_log_item_desc_zone;
#if defined(CONFIG_TRACEPOINTS)
static void
......@@ -734,77 +733,52 @@ xfs_trans_unreserve_and_mod_sb(
return;
}
/*
* Add the given log item to the transaction's list of log items.
*
* The log item will now point to its new descriptor with its li_desc field.
*/
/* Add the given log item to the transaction's list of log items. */
void
xfs_trans_add_item(
struct xfs_trans *tp,
struct xfs_log_item *lip)
{
struct xfs_log_item_desc *lidp;
ASSERT(lip->li_mountp == tp->t_mountp);
ASSERT(lip->li_ailp == tp->t_mountp->m_ail);
ASSERT(list_empty(&lip->li_trans));
ASSERT(!test_bit(XFS_LI_DIRTY, &lip->li_flags));
lidp = kmem_zone_zalloc(xfs_log_item_desc_zone, KM_SLEEP | KM_NOFS);
lidp->lid_item = lip;
lidp->lid_flags = 0;
list_add_tail(&lidp->lid_trans, &tp->t_items);
lip->li_desc = lidp;
list_add_tail(&lip->li_trans, &tp->t_items);
trace_xfs_trans_add_item(tp, _RET_IP_);
}
STATIC void
xfs_trans_free_item_desc(
struct xfs_log_item_desc *lidp)
{
list_del_init(&lidp->lid_trans);
kmem_zone_free(xfs_log_item_desc_zone, lidp);
}
/*
* Unlink and free the given descriptor.
* Unlink the log item from the transaction. the log item is no longer
* considered dirty in this transaction, as the linked transaction has
* finished, either by abort or commit completion.
*/
void
xfs_trans_del_item(
struct xfs_log_item *lip)
{
xfs_trans_free_item_desc(lip->li_desc);
lip->li_desc = NULL;
clear_bit(XFS_LI_DIRTY, &lip->li_flags);
list_del_init(&lip->li_trans);
}
/*
* Unlock all of the items of a transaction and free all the descriptors
* of that transaction.
*/
/* Detach and unlock all of the items in a transaction */
void
xfs_trans_free_items(
struct xfs_trans *tp,
xfs_lsn_t commit_lsn,
bool abort)
{
struct xfs_log_item_desc *lidp, *next;
struct xfs_log_item *lip, *next;
trace_xfs_trans_free_items(tp, _RET_IP_);
list_for_each_entry_safe(lidp, next, &tp->t_items, lid_trans) {
struct xfs_log_item *lip = lidp->lid_item;
lip->li_desc = NULL;
list_for_each_entry_safe(lip, next, &tp->t_items, li_trans) {
xfs_trans_del_item(lip);
if (commit_lsn != NULLCOMMITLSN)
lip->li_ops->iop_committing(lip, commit_lsn);
if (abort)
set_bit(XFS_LI_ABORTED, &lip->li_flags);
lip->li_ops->iop_unlock(lip);
xfs_trans_free_item_desc(lidp);
}
}
......@@ -1052,10 +1026,10 @@ xfs_trans_cancel(
}
#ifdef DEBUG
if (!dirty && !XFS_FORCED_SHUTDOWN(mp)) {
struct xfs_log_item_desc *lidp;
struct xfs_log_item *lip;
list_for_each_entry(lidp, &tp->t_items, lid_trans)
ASSERT(!(lidp->lid_item->li_type == XFS_LI_EFD));
list_for_each_entry(lip, &tp->t_items, li_trans)
ASSERT(!(lip->li_type == XFS_LI_EFD));
}
#endif
xfs_trans_unreserve_and_mod_sb(tp);
......
......@@ -27,7 +27,6 @@ struct xfs_efi_log_item;
struct xfs_inode;
struct xfs_item_ops;
struct xfs_log_iovec;
struct xfs_log_item_desc;
struct xfs_mount;
struct xfs_trans;
struct xfs_trans_res;
......@@ -43,8 +42,8 @@ struct xfs_bud_log_item;
typedef struct xfs_log_item {
struct list_head li_ail; /* AIL pointers */
struct list_head li_trans; /* transaction list */
xfs_lsn_t li_lsn; /* last on-disk lsn */
struct xfs_log_item_desc *li_desc; /* ptr to current desc*/
struct xfs_mount *li_mountp; /* ptr to fs mount */
struct xfs_ail *li_ailp; /* ptr to AIL */
uint li_type; /* item type */
......@@ -72,11 +71,13 @@ typedef struct xfs_log_item {
#define XFS_LI_IN_AIL 0
#define XFS_LI_ABORTED 1
#define XFS_LI_FAILED 2
#define XFS_LI_DIRTY 3 /* log item dirty in transaction */
#define XFS_LI_FLAGS \
{ (1 << XFS_LI_IN_AIL), "IN_AIL" }, \
{ (1 << XFS_LI_ABORTED), "ABORTED" }, \
{ (1 << XFS_LI_FAILED), "FAILED" }
{ (1 << XFS_LI_FAILED), "FAILED" }, \
{ (1 << XFS_LI_DIRTY), "DIRTY" }
struct xfs_item_ops {
void (*iop_size)(xfs_log_item_t *, int *, int *);
......@@ -248,7 +249,6 @@ void xfs_trans_buf_copy_type(struct xfs_buf *dst_bp,
struct xfs_buf *src_bp);
extern kmem_zone_t *xfs_trans_zone;
extern kmem_zone_t *xfs_log_item_desc_zone;
/* rmap updates */
enum xfs_rmap_intent_type;
......
......@@ -79,7 +79,7 @@ xfs_trans_log_finish_bmap_update(
* 2.) shuts down the filesystem
*/
tp->t_flags |= XFS_TRANS_DIRTY;
budp->bud_item.li_desc->lid_flags |= XFS_LID_DIRTY;
set_bit(XFS_LI_DIRTY, &budp->bud_item.li_flags);
return error;
}
......@@ -158,7 +158,7 @@ xfs_bmap_update_log_item(
bmap = container_of(item, struct xfs_bmap_intent, bi_list);
tp->t_flags |= XFS_TRANS_DIRTY;
buip->bui_item.li_desc->lid_flags |= XFS_LID_DIRTY;
set_bit(XFS_LI_DIRTY, &buip->bui_item.li_flags);
/*
* atomic_inc_return gives us the value after the increment;
......
......@@ -40,7 +40,7 @@ xfs_trans_buf_item_match(
struct xfs_buf_map *map,
int nmaps)
{
struct xfs_log_item_desc *lidp;
struct xfs_log_item *lip;
struct xfs_buf_log_item *blip;
int len = 0;
int i;
......@@ -48,8 +48,8 @@ xfs_trans_buf_item_match(
for (i = 0; i < nmaps; i++)
len += map[i].bm_len;
list_for_each_entry(lidp, &tp->t_items, lid_trans) {
blip = (struct xfs_buf_log_item *)lidp->lid_item;
list_for_each_entry(lip, &tp->t_items, li_trans) {
blip = (struct xfs_buf_log_item *)lip;
if (blip->bli_item.li_type == XFS_LI_BUF &&
blip->bli_buf->b_target == target &&
XFS_BUF_ADDR(blip->bli_buf) == map[0].bm_bn &&
......@@ -100,14 +100,10 @@ _xfs_trans_bjoin(
atomic_inc(&bip->bli_refcount);
/*
* Get a log_item_desc to point at the new item.
* Attach the item to the transaction so we can find it in
* xfs_trans_get_buf() and friends.
*/
xfs_trans_add_item(tp, &bip->bli_item);
/*
* Initialize b_fsprivate2 so we can find it with incore_match()
* in xfs_trans_get_buf() and friends above.
*/
bp->b_transp = tp;
}
......@@ -391,7 +387,7 @@ xfs_trans_brelse(
* If the buffer is dirty within this transaction, we can't
* release it until we commit.
*/
if (bip->bli_item.li_desc->lid_flags & XFS_LID_DIRTY)
if (test_bit(XFS_LI_DIRTY, &bip->bli_item.li_flags))
return;
/*
......@@ -542,7 +538,7 @@ xfs_trans_dirty_buf(
bip->bli_flags |= XFS_BLI_DIRTY | XFS_BLI_LOGGED;
tp->t_flags |= XFS_TRANS_DIRTY;
bip->bli_item.li_desc->lid_flags |= XFS_LID_DIRTY;
set_bit(XFS_LI_DIRTY, &bip->bli_item.li_flags);
}
/*
......@@ -626,7 +622,7 @@ xfs_trans_binval(
ASSERT(!(bip->__bli_format.blf_flags & XFS_BLF_INODE_BUF));
ASSERT(!(bip->__bli_format.blf_flags & XFS_BLFT_MASK));
ASSERT(bip->__bli_format.blf_flags & XFS_BLF_CANCEL);
ASSERT(bip->bli_item.li_desc->lid_flags & XFS_LID_DIRTY);
ASSERT(test_bit(XFS_LI_DIRTY, &bip->bli_item.li_flags));
ASSERT(tp->t_flags & XFS_TRANS_DIRTY);
return;
}
......@@ -642,7 +638,7 @@ xfs_trans_binval(
memset(bip->bli_formats[i].blf_data_map, 0,
(bip->bli_formats[i].blf_map_size * sizeof(uint)));
}
bip->bli_item.li_desc->lid_flags |= XFS_LID_DIRTY;
set_bit(XFS_LI_DIRTY, &bip->bli_item.li_flags);
tp->t_flags |= XFS_TRANS_DIRTY;
}
......
......@@ -77,7 +77,7 @@ xfs_trans_log_dquot(
ASSERT(XFS_DQ_IS_LOCKED(dqp));
tp->t_flags |= XFS_TRANS_DIRTY;
dqp->q_logitem.qli_item.li_desc->lid_flags |= XFS_LID_DIRTY;
set_bit(XFS_LI_DIRTY, &dqp->q_logitem.qli_item.li_flags);
}
/*
......@@ -879,7 +879,7 @@ xfs_trans_log_quotaoff_item(
xfs_qoff_logitem_t *qlp)
{
tp->t_flags |= XFS_TRANS_DIRTY;
qlp->qql_item.li_desc->lid_flags |= XFS_LID_DIRTY;
set_bit(XFS_LI_DIRTY, &qlp->qql_item.li_flags);
}
STATIC void
......
......@@ -90,7 +90,7 @@ xfs_trans_free_extent(
* 2.) shuts down the filesystem
*/
tp->t_flags |= XFS_TRANS_DIRTY;
efdp->efd_item.li_desc->lid_flags |= XFS_LID_DIRTY;
set_bit(XFS_LI_DIRTY, &efdp->efd_item.li_flags);
next_extent = efdp->efd_next_extent;
ASSERT(next_extent < efdp->efd_format.efd_nextents);
......@@ -155,7 +155,7 @@ xfs_extent_free_log_item(
free = container_of(item, struct xfs_extent_free_item, xefi_list);
tp->t_flags |= XFS_TRANS_DIRTY;
efip->efi_item.li_desc->lid_flags |= XFS_LID_DIRTY;
set_bit(XFS_LI_DIRTY, &efip->efi_item.li_flags);
/*
* atomic_inc_return gives us the value after the increment;
......@@ -273,7 +273,7 @@ xfs_agfl_free_finish_item(
* 2.) shuts down the filesystem
*/
tp->t_flags |= XFS_TRANS_DIRTY;
efdp->efd_item.li_desc->lid_flags |= XFS_LID_DIRTY;
set_bit(XFS_LI_DIRTY, &efdp->efd_item.li_flags);
next_extent = efdp->efd_next_extent;
ASSERT(next_extent < efdp->efd_format.efd_nextents);
......
......@@ -133,14 +133,13 @@ xfs_trans_log_inode(
* set however, then go ahead and bump the i_version counter
* unconditionally.
*/
if (!(ip->i_itemp->ili_item.li_desc->lid_flags & XFS_LID_DIRTY) &&
if (!test_and_set_bit(XFS_LI_DIRTY, &ip->i_itemp->ili_item.li_flags) &&
IS_I_VERSION(VFS_I(ip))) {
if (inode_maybe_inc_iversion(VFS_I(ip), flags & XFS_ILOG_CORE))
flags |= XFS_ILOG_CORE;
}
tp->t_flags |= XFS_TRANS_DIRTY;
ip->i_itemp->ili_item.li_desc->lid_flags |= XFS_LID_DIRTY;
/*
* Always OR in the bits from the ili_last_fields field.
......
......@@ -19,7 +19,6 @@
#define __XFS_TRANS_PRIV_H__
struct xfs_log_item;
struct xfs_log_item_desc;
struct xfs_mount;
struct xfs_trans;
struct xfs_ail;
......
......@@ -77,7 +77,7 @@ xfs_trans_log_finish_refcount_update(
* 2.) shuts down the filesystem
*/
tp->t_flags |= XFS_TRANS_DIRTY;
cudp->cud_item.li_desc->lid_flags |= XFS_LID_DIRTY;
set_bit(XFS_LI_DIRTY, &cudp->cud_item.li_flags);
return error;
}
......@@ -154,7 +154,7 @@ xfs_refcount_update_log_item(
refc = container_of(item, struct xfs_refcount_intent, ri_list);
tp->t_flags |= XFS_TRANS_DIRTY;
cuip->cui_item.li_desc->lid_flags |= XFS_LID_DIRTY;
set_bit(XFS_LI_DIRTY, &cuip->cui_item.li_flags);
/*
* atomic_inc_return gives us the value after the increment;
......
......@@ -117,7 +117,7 @@ xfs_trans_log_finish_rmap_update(
* 2.) shuts down the filesystem
*/
tp->t_flags |= XFS_TRANS_DIRTY;
rudp->rud_item.li_desc->lid_flags |= XFS_LID_DIRTY;
set_bit(XFS_LI_DIRTY, &rudp->rud_item.li_flags);
return error;
}
......@@ -175,7 +175,7 @@ xfs_rmap_update_log_item(
rmap = container_of(item, struct xfs_rmap_intent, ri_list);
tp->t_flags |= XFS_TRANS_DIRTY;
ruip->rui_item.li_desc->lid_flags |= XFS_LID_DIRTY;
set_bit(XFS_LI_DIRTY, &ruip->rui_item.li_flags);
/*
* atomic_inc_return gives us the value after the increment;
......
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