#define XLOG_REG_TYPE_COMMIT 18
#define XLOG_REG_TYPE_TRANSHDR 19
#define XLOG_REG_TYPE_ICREATE 20
-#define XLOG_REG_TYPE_MAX 20
+#define XLOG_REG_TYPE_RUI_FORMAT 21
+#define XLOG_REG_TYPE_RUD_FORMAT 22
+#define XLOG_REG_TYPE_MAX 22
/*
* Flags to log operation header
#define XFS_LI_DQUOT 0x123d
#define XFS_LI_QUOTAOFF 0x123e
#define XFS_LI_ICREATE 0x123f
+#define XFS_LI_RUI 0x1240 /* rmap update intent */
+#define XFS_LI_RUD 0x1241
#define XFS_LI_TYPE_DESC \
{ XFS_LI_EFI, "XFS_LI_EFI" }, \
{ XFS_LI_BUF, "XFS_LI_BUF" }, \
{ XFS_LI_DQUOT, "XFS_LI_DQUOT" }, \
{ XFS_LI_QUOTAOFF, "XFS_LI_QUOTAOFF" }, \
- { XFS_LI_ICREATE, "XFS_LI_ICREATE" }
+ { XFS_LI_ICREATE, "XFS_LI_ICREATE" }, \
+ { XFS_LI_RUI, "XFS_LI_RUI" }, \
+ { XFS_LI_RUD, "XFS_LI_RUD" }
/*
* Inode Log Item Format definitions.
xfs_extent_64_t efd_extents[1]; /* array of extents freed */
} xfs_efd_log_format_64_t;
+/*
+ * RUI/RUD (reverse mapping) log format definitions
+ */
+struct xfs_map_extent {
+ __uint64_t me_owner;
+ __uint64_t me_startblock;
+ __uint64_t me_startoff;
+ __uint32_t me_len;
+ __uint32_t me_flags;
+};
+
+/* rmap me_flags: upper bits are flags, lower byte is type code */
+#define XFS_RMAP_EXTENT_MAP 1
+#define XFS_RMAP_EXTENT_UNMAP 3
+#define XFS_RMAP_EXTENT_CONVERT 5
+#define XFS_RMAP_EXTENT_ALLOC 7
+#define XFS_RMAP_EXTENT_FREE 8
+#define XFS_RMAP_EXTENT_TYPE_MASK 0xFF
+
+#define XFS_RMAP_EXTENT_ATTR_FORK (1U << 31)
+#define XFS_RMAP_EXTENT_BMBT_BLOCK (1U << 30)
+#define XFS_RMAP_EXTENT_UNWRITTEN (1U << 29)
+
+#define XFS_RMAP_EXTENT_FLAGS (XFS_RMAP_EXTENT_TYPE_MASK | \
+ XFS_RMAP_EXTENT_ATTR_FORK | \
+ XFS_RMAP_EXTENT_BMBT_BLOCK | \
+ XFS_RMAP_EXTENT_UNWRITTEN)
+
+/*
+ * This is the structure used to lay out an rui log item in the
+ * log. The rui_extents field is a variable size array whose
+ * size is given by rui_nextents.
+ */
+struct xfs_rui_log_format {
+ __uint16_t rui_type; /* rui log item type */
+ __uint16_t rui_size; /* size of this item */
+ __uint32_t rui_nextents; /* # extents to free */
+ __uint64_t rui_id; /* rui identifier */
+ struct xfs_map_extent rui_extents[1]; /* array of extents to rmap */
+};
+
+/*
+ * This is the structure used to lay out an rud log item in the
+ * log. The rud_extents array is a variable size array whose
+ * size is given by rud_nextents;
+ */
+struct xfs_rud_log_format {
+ __uint16_t rud_type; /* rud log item type */
+ __uint16_t rud_size; /* size of this item */
+ __uint32_t rud_nextents; /* # of extents freed */
+ __uint64_t rud_rui_id; /* id of corresponding rui */
+ struct xfs_map_extent rud_extents[1]; /* array of extents rmapped */
+};
+
/*
* Dquot Log format definitions.
*
--- /dev/null
+/*
+ * Copyright (C) 2016 Oracle. All Rights Reserved.
+ *
+ * Author: Darrick J. Wong <darrick.wong@oracle.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+#include "xfs.h"
+#include "xfs_fs.h"
+#include "xfs_format.h"
+#include "xfs_log_format.h"
+#include "xfs_trans_resv.h"
+#include "xfs_mount.h"
+#include "xfs_trans.h"
+#include "xfs_trans_priv.h"
+#include "xfs_buf_item.h"
+#include "xfs_rmap_item.h"
+#include "xfs_log.h"
+
+
+kmem_zone_t *xfs_rui_zone;
+kmem_zone_t *xfs_rud_zone;
+
+static inline struct xfs_rui_log_item *RUI_ITEM(struct xfs_log_item *lip)
+{
+ return container_of(lip, struct xfs_rui_log_item, rui_item);
+}
+
+void
+xfs_rui_item_free(
+ struct xfs_rui_log_item *ruip)
+{
+ if (ruip->rui_format.rui_nextents > XFS_RUI_MAX_FAST_EXTENTS)
+ kmem_free(ruip);
+ else
+ kmem_zone_free(xfs_rui_zone, ruip);
+}
+
+/*
+ * This returns the number of iovecs needed to log the given rui item.
+ * We only need 1 iovec for an rui item. It just logs the rui_log_format
+ * structure.
+ */
+static inline int
+xfs_rui_item_sizeof(
+ struct xfs_rui_log_item *ruip)
+{
+ return sizeof(struct xfs_rui_log_format) +
+ (ruip->rui_format.rui_nextents - 1) *
+ sizeof(struct xfs_map_extent);
+}
+
+STATIC void
+xfs_rui_item_size(
+ struct xfs_log_item *lip,
+ int *nvecs,
+ int *nbytes)
+{
+ *nvecs += 1;
+ *nbytes += xfs_rui_item_sizeof(RUI_ITEM(lip));
+}
+
+/*
+ * This is called to fill in the vector of log iovecs for the
+ * given rui log item. We use only 1 iovec, and we point that
+ * at the rui_log_format structure embedded in the rui item.
+ * It is at this point that we assert that all of the extent
+ * slots in the rui item have been filled.
+ */
+STATIC void
+xfs_rui_item_format(
+ struct xfs_log_item *lip,
+ struct xfs_log_vec *lv)
+{
+ struct xfs_rui_log_item *ruip = RUI_ITEM(lip);
+ struct xfs_log_iovec *vecp = NULL;
+
+ ASSERT(atomic_read(&ruip->rui_next_extent) ==
+ ruip->rui_format.rui_nextents);
+
+ ruip->rui_format.rui_type = XFS_LI_RUI;
+ ruip->rui_format.rui_size = 1;
+
+ xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_RUI_FORMAT, &ruip->rui_format,
+ xfs_rui_item_sizeof(ruip));
+}
+
+/*
+ * Pinning has no meaning for an rui item, so just return.
+ */
+STATIC void
+xfs_rui_item_pin(
+ struct xfs_log_item *lip)
+{
+}
+
+/*
+ * The unpin operation is the last place an RUI is manipulated in the log. It is
+ * either inserted in the AIL or aborted in the event of a log I/O error. In
+ * either case, the RUI transaction has been successfully committed to make it
+ * this far. Therefore, we expect whoever committed the RUI to either construct
+ * and commit the RUD or drop the RUD's reference in the event of error. Simply
+ * drop the log's RUI reference now that the log is done with it.
+ */
+STATIC void
+xfs_rui_item_unpin(
+ struct xfs_log_item *lip,
+ int remove)
+{
+ struct xfs_rui_log_item *ruip = RUI_ITEM(lip);
+
+ xfs_rui_release(ruip);
+}
+
+/*
+ * RUI items have no locking or pushing. However, since RUIs are pulled from
+ * the AIL when their corresponding RUDs are committed to disk, their situation
+ * is very similar to being pinned. Return XFS_ITEM_PINNED so that the caller
+ * will eventually flush the log. This should help in getting the RUI out of
+ * the AIL.
+ */
+STATIC uint
+xfs_rui_item_push(
+ struct xfs_log_item *lip,
+ struct list_head *buffer_list)
+{
+ return XFS_ITEM_PINNED;
+}
+
+/*
+ * The RUI has been either committed or aborted if the transaction has been
+ * cancelled. If the transaction was cancelled, an RUD isn't going to be
+ * constructed and thus we free the RUI here directly.
+ */
+STATIC void
+xfs_rui_item_unlock(
+ struct xfs_log_item *lip)
+{
+ if (lip->li_flags & XFS_LI_ABORTED)
+ xfs_rui_item_free(RUI_ITEM(lip));
+}
+
+/*
+ * The RUI is logged only once and cannot be moved in the log, so simply return
+ * the lsn at which it's been logged.
+ */
+STATIC xfs_lsn_t
+xfs_rui_item_committed(
+ struct xfs_log_item *lip,
+ xfs_lsn_t lsn)
+{
+ return lsn;
+}
+
+/*
+ * The RUI dependency tracking op doesn't do squat. It can't because
+ * it doesn't know where the free extent is coming from. The dependency
+ * tracking has to be handled by the "enclosing" metadata object. For
+ * example, for inodes, the inode is locked throughout the extent freeing
+ * so the dependency should be recorded there.
+ */
+STATIC void
+xfs_rui_item_committing(
+ struct xfs_log_item *lip,
+ xfs_lsn_t lsn)
+{
+}
+
+/*
+ * This is the ops vector shared by all rui log items.
+ */
+static const struct xfs_item_ops xfs_rui_item_ops = {
+ .iop_size = xfs_rui_item_size,
+ .iop_format = xfs_rui_item_format,
+ .iop_pin = xfs_rui_item_pin,
+ .iop_unpin = xfs_rui_item_unpin,
+ .iop_unlock = xfs_rui_item_unlock,
+ .iop_committed = xfs_rui_item_committed,
+ .iop_push = xfs_rui_item_push,
+ .iop_committing = xfs_rui_item_committing,
+};
+
+/*
+ * Allocate and initialize an rui item with the given number of extents.
+ */
+struct xfs_rui_log_item *
+xfs_rui_init(
+ struct xfs_mount *mp,
+ uint nextents)
+
+{
+ struct xfs_rui_log_item *ruip;
+ uint size;
+
+ ASSERT(nextents > 0);
+ if (nextents > XFS_RUI_MAX_FAST_EXTENTS) {
+ size = (uint)(sizeof(struct xfs_rui_log_item) +
+ ((nextents - 1) * sizeof(struct xfs_map_extent)));
+ ruip = kmem_zalloc(size, KM_SLEEP);
+ } else {
+ ruip = kmem_zone_zalloc(xfs_rui_zone, KM_SLEEP);
+ }
+
+ xfs_log_item_init(mp, &ruip->rui_item, XFS_LI_RUI, &xfs_rui_item_ops);
+ ruip->rui_format.rui_nextents = nextents;
+ ruip->rui_format.rui_id = (uintptr_t)(void *)ruip;
+ atomic_set(&ruip->rui_next_extent, 0);
+ atomic_set(&ruip->rui_refcount, 2);
+
+ return ruip;
+}
+
+/*
+ * Copy an RUI format buffer from the given buf, and into the destination
+ * RUI format structure. The RUI/RUD items were designed not to need any
+ * special alignment handling.
+ */
+int
+xfs_rui_copy_format(
+ struct xfs_log_iovec *buf,
+ struct xfs_rui_log_format *dst_rui_fmt)
+{
+ struct xfs_rui_log_format *src_rui_fmt;
+ uint len;
+
+ src_rui_fmt = buf->i_addr;
+ len = sizeof(struct xfs_rui_log_format) +
+ (src_rui_fmt->rui_nextents - 1) *
+ sizeof(struct xfs_map_extent);
+
+ if (buf->i_len != len)
+ return -EFSCORRUPTED;
+
+ memcpy((char *)dst_rui_fmt, (char *)src_rui_fmt, len);
+ return 0;
+}
+
+/*
+ * Freeing the RUI requires that we remove it from the AIL if it has already
+ * been placed there. However, the RUI may not yet have been placed in the AIL
+ * when called by xfs_rui_release() from RUD processing due to the ordering of
+ * committed vs unpin operations in bulk insert operations. Hence the reference
+ * count to ensure only the last caller frees the RUI.
+ */
+void
+xfs_rui_release(
+ struct xfs_rui_log_item *ruip)
+{
+ if (atomic_dec_and_test(&ruip->rui_refcount)) {
+ xfs_trans_ail_remove(&ruip->rui_item, SHUTDOWN_LOG_IO_ERROR);
+ xfs_rui_item_free(ruip);
+ }
+}
+
+static inline struct xfs_rud_log_item *RUD_ITEM(struct xfs_log_item *lip)
+{
+ return container_of(lip, struct xfs_rud_log_item, rud_item);
+}
+
+STATIC void
+xfs_rud_item_free(struct xfs_rud_log_item *rudp)
+{
+ if (rudp->rud_format.rud_nextents > XFS_RUD_MAX_FAST_EXTENTS)
+ kmem_free(rudp);
+ else
+ kmem_zone_free(xfs_rud_zone, rudp);
+}
+
+/*
+ * This returns the number of iovecs needed to log the given rud item.
+ * We only need 1 iovec for an rud item. It just logs the rud_log_format
+ * structure.
+ */
+static inline int
+xfs_rud_item_sizeof(
+ struct xfs_rud_log_item *rudp)
+{
+ return sizeof(struct xfs_rud_log_format) +
+ (rudp->rud_format.rud_nextents - 1) *
+ sizeof(struct xfs_map_extent);
+}
+
+STATIC void
+xfs_rud_item_size(
+ struct xfs_log_item *lip,
+ int *nvecs,
+ int *nbytes)
+{
+ *nvecs += 1;
+ *nbytes += xfs_rud_item_sizeof(RUD_ITEM(lip));
+}
+
+/*
+ * This is called to fill in the vector of log iovecs for the
+ * given rud log item. We use only 1 iovec, and we point that
+ * at the rud_log_format structure embedded in the rud item.
+ * It is at this point that we assert that all of the extent
+ * slots in the rud item have been filled.
+ */
+STATIC void
+xfs_rud_item_format(
+ struct xfs_log_item *lip,
+ struct xfs_log_vec *lv)
+{
+ struct xfs_rud_log_item *rudp = RUD_ITEM(lip);
+ struct xfs_log_iovec *vecp = NULL;
+
+ ASSERT(rudp->rud_next_extent == rudp->rud_format.rud_nextents);
+
+ rudp->rud_format.rud_type = XFS_LI_RUD;
+ rudp->rud_format.rud_size = 1;
+
+ xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_RUD_FORMAT, &rudp->rud_format,
+ xfs_rud_item_sizeof(rudp));
+}
+
+/*
+ * Pinning has no meaning for an rud item, so just return.
+ */
+STATIC void
+xfs_rud_item_pin(
+ struct xfs_log_item *lip)
+{
+}
+
+/*
+ * Since pinning has no meaning for an rud item, unpinning does
+ * not either.
+ */
+STATIC void
+xfs_rud_item_unpin(
+ struct xfs_log_item *lip,
+ int remove)
+{
+}
+
+/*
+ * There isn't much you can do to push on an rud item. It is simply stuck
+ * waiting for the log to be flushed to disk.
+ */
+STATIC uint
+xfs_rud_item_push(
+ struct xfs_log_item *lip,
+ struct list_head *buffer_list)
+{
+ return XFS_ITEM_PINNED;
+}
+
+/*
+ * The RUD is either committed or aborted if the transaction is cancelled. If
+ * the transaction is cancelled, drop our reference to the RUI and free the
+ * RUD.
+ */
+STATIC void
+xfs_rud_item_unlock(
+ struct xfs_log_item *lip)
+{
+ struct xfs_rud_log_item *rudp = RUD_ITEM(lip);
+
+ if (lip->li_flags & XFS_LI_ABORTED) {
+ xfs_rui_release(rudp->rud_ruip);
+ xfs_rud_item_free(rudp);
+ }
+}
+
+/*
+ * When the rud item is committed to disk, all we need to do is delete our
+ * reference to our partner rui item and then free ourselves. Since we're
+ * freeing ourselves we must return -1 to keep the transaction code from
+ * further referencing this item.
+ */
+STATIC xfs_lsn_t
+xfs_rud_item_committed(
+ struct xfs_log_item *lip,
+ xfs_lsn_t lsn)
+{
+ struct xfs_rud_log_item *rudp = RUD_ITEM(lip);
+
+ /*
+ * Drop the RUI reference regardless of whether the RUD has been
+ * aborted. Once the RUD transaction is constructed, it is the sole
+ * responsibility of the RUD to release the RUI (even if the RUI is
+ * aborted due to log I/O error).
+ */
+ xfs_rui_release(rudp->rud_ruip);
+ xfs_rud_item_free(rudp);
+
+ return (xfs_lsn_t)-1;
+}
+
+/*
+ * The RUD dependency tracking op doesn't do squat. It can't because
+ * it doesn't know where the free extent is coming from. The dependency
+ * tracking has to be handled by the "enclosing" metadata object. For
+ * example, for inodes, the inode is locked throughout the extent freeing
+ * so the dependency should be recorded there.
+ */
+STATIC void
+xfs_rud_item_committing(
+ struct xfs_log_item *lip,
+ xfs_lsn_t lsn)
+{
+}
+
+/*
+ * This is the ops vector shared by all rud log items.
+ */
+static const struct xfs_item_ops xfs_rud_item_ops = {
+ .iop_size = xfs_rud_item_size,
+ .iop_format = xfs_rud_item_format,
+ .iop_pin = xfs_rud_item_pin,
+ .iop_unpin = xfs_rud_item_unpin,
+ .iop_unlock = xfs_rud_item_unlock,
+ .iop_committed = xfs_rud_item_committed,
+ .iop_push = xfs_rud_item_push,
+ .iop_committing = xfs_rud_item_committing,
+};
+
+/*
+ * Allocate and initialize an rud item with the given number of extents.
+ */
+struct xfs_rud_log_item *
+xfs_rud_init(
+ struct xfs_mount *mp,
+ struct xfs_rui_log_item *ruip,
+ uint nextents)
+
+{
+ struct xfs_rud_log_item *rudp;
+ uint size;
+
+ ASSERT(nextents > 0);
+ if (nextents > XFS_RUD_MAX_FAST_EXTENTS) {
+ size = (uint)(sizeof(struct xfs_rud_log_item) +
+ ((nextents - 1) * sizeof(struct xfs_map_extent)));
+ rudp = kmem_zalloc(size, KM_SLEEP);
+ } else {
+ rudp = kmem_zone_zalloc(xfs_rud_zone, KM_SLEEP);
+ }
+
+ xfs_log_item_init(mp, &rudp->rud_item, XFS_LI_RUD, &xfs_rud_item_ops);
+ rudp->rud_ruip = ruip;
+ rudp->rud_format.rud_nextents = nextents;
+ rudp->rud_format.rud_rui_id = ruip->rui_format.rui_id;
+
+ return rudp;
+}
--- /dev/null
+/*
+ * Copyright (C) 2016 Oracle. All Rights Reserved.
+ *
+ * Author: Darrick J. Wong <darrick.wong@oracle.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+#ifndef __XFS_RMAP_ITEM_H__
+#define __XFS_RMAP_ITEM_H__
+
+/*
+ * There are (currently) three pairs of rmap btree redo item types: map, unmap,
+ * and convert. The common abbreviations for these are RUI (rmap update
+ * intent) and RUD (rmap update done). The redo item type is encoded in the
+ * flags field of each xfs_map_extent.
+ *
+ * *I items should be recorded in the *first* of a series of rolled
+ * transactions, and the *D items should be recorded in the same transaction
+ * that records the associated rmapbt updates. Typically, the first
+ * transaction will record a bmbt update, followed by some number of
+ * transactions containing rmapbt updates, and finally transactions with any
+ * bnobt/cntbt updates.
+ *
+ * Should the system crash after the commit of the first transaction but
+ * before the commit of the final transaction in a series, log recovery will
+ * use the redo information recorded by the intent items to replay the
+ * (rmapbt/bnobt/cntbt) metadata updates in the non-first transaction.
+ */
+
+/* kernel only RUI/RUD definitions */
+
+struct xfs_mount;
+struct kmem_zone;
+
+/*
+ * Max number of extents in fast allocation path.
+ */
+#define XFS_RUI_MAX_FAST_EXTENTS 16
+
+/*
+ * Define RUI flag bits. Manipulated by set/clear/test_bit operators.
+ */
+#define XFS_RUI_RECOVERED 1
+
+/*
+ * This is the "rmap update intent" log item. It is used to log the fact that
+ * some reverse mappings need to change. It is used in conjunction with the
+ * "rmap update done" log item described below.
+ *
+ * These log items follow the same rules as struct xfs_efi_log_item; see the
+ * comments about that structure (in xfs_extfree_item.h) for more details.
+ */
+struct xfs_rui_log_item {
+ struct xfs_log_item rui_item;
+ atomic_t rui_refcount;
+ atomic_t rui_next_extent;
+ unsigned long rui_flags; /* misc flags */
+ struct xfs_rui_log_format rui_format;
+};
+
+/*
+ * This is the "rmap update done" log item. It is used to log the fact that
+ * some rmapbt updates mentioned in an earlier rui item have been performed.
+ */
+struct xfs_rud_log_item {
+ struct xfs_log_item rud_item;
+ struct xfs_rui_log_item *rud_ruip;
+ uint rud_next_extent;
+ struct xfs_rud_log_format rud_format;
+};
+
+/*
+ * Max number of extents in fast allocation path.
+ */
+#define XFS_RUD_MAX_FAST_EXTENTS 16
+
+extern struct kmem_zone *xfs_rui_zone;
+extern struct kmem_zone *xfs_rud_zone;
+
+struct xfs_rui_log_item *xfs_rui_init(struct xfs_mount *, uint);
+struct xfs_rud_log_item *xfs_rud_init(struct xfs_mount *,
+ struct xfs_rui_log_item *, uint);
+int xfs_rui_copy_format(struct xfs_log_iovec *buf,
+ struct xfs_rui_log_format *dst_rui_fmt);
+void xfs_rui_item_free(struct xfs_rui_log_item *);
+void xfs_rui_release(struct xfs_rui_log_item *);
+
+#endif /* __XFS_RMAP_ITEM_H__ */
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff