v4.19.13 snapshot.
diff --git a/fs/xfs/xfs_inode_item.c b/fs/xfs/xfs_inode_item.c
new file mode 100644
index 0000000..fa1c4fe
--- /dev/null
+++ b/fs/xfs/xfs_inode_item.c
@@ -0,0 +1,847 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
+ * All Rights Reserved.
+ */
+#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_inode.h"
+#include "xfs_trans.h"
+#include "xfs_inode_item.h"
+#include "xfs_error.h"
+#include "xfs_trace.h"
+#include "xfs_trans_priv.h"
+#include "xfs_buf_item.h"
+#include "xfs_log.h"
+
+#include <linux/iversion.h>
+
+kmem_zone_t *xfs_ili_zone; /* inode log item zone */
+
+static inline struct xfs_inode_log_item *INODE_ITEM(struct xfs_log_item *lip)
+{
+ return container_of(lip, struct xfs_inode_log_item, ili_item);
+}
+
+STATIC void
+xfs_inode_item_data_fork_size(
+ struct xfs_inode_log_item *iip,
+ int *nvecs,
+ int *nbytes)
+{
+ struct xfs_inode *ip = iip->ili_inode;
+
+ switch (ip->i_d.di_format) {
+ case XFS_DINODE_FMT_EXTENTS:
+ if ((iip->ili_fields & XFS_ILOG_DEXT) &&
+ ip->i_d.di_nextents > 0 &&
+ ip->i_df.if_bytes > 0) {
+ /* worst case, doesn't subtract delalloc extents */
+ *nbytes += XFS_IFORK_DSIZE(ip);
+ *nvecs += 1;
+ }
+ break;
+ case XFS_DINODE_FMT_BTREE:
+ if ((iip->ili_fields & XFS_ILOG_DBROOT) &&
+ ip->i_df.if_broot_bytes > 0) {
+ *nbytes += ip->i_df.if_broot_bytes;
+ *nvecs += 1;
+ }
+ break;
+ case XFS_DINODE_FMT_LOCAL:
+ if ((iip->ili_fields & XFS_ILOG_DDATA) &&
+ ip->i_df.if_bytes > 0) {
+ *nbytes += roundup(ip->i_df.if_bytes, 4);
+ *nvecs += 1;
+ }
+ break;
+
+ case XFS_DINODE_FMT_DEV:
+ break;
+ default:
+ ASSERT(0);
+ break;
+ }
+}
+
+STATIC void
+xfs_inode_item_attr_fork_size(
+ struct xfs_inode_log_item *iip,
+ int *nvecs,
+ int *nbytes)
+{
+ struct xfs_inode *ip = iip->ili_inode;
+
+ switch (ip->i_d.di_aformat) {
+ case XFS_DINODE_FMT_EXTENTS:
+ if ((iip->ili_fields & XFS_ILOG_AEXT) &&
+ ip->i_d.di_anextents > 0 &&
+ ip->i_afp->if_bytes > 0) {
+ /* worst case, doesn't subtract unused space */
+ *nbytes += XFS_IFORK_ASIZE(ip);
+ *nvecs += 1;
+ }
+ break;
+ case XFS_DINODE_FMT_BTREE:
+ if ((iip->ili_fields & XFS_ILOG_ABROOT) &&
+ ip->i_afp->if_broot_bytes > 0) {
+ *nbytes += ip->i_afp->if_broot_bytes;
+ *nvecs += 1;
+ }
+ break;
+ case XFS_DINODE_FMT_LOCAL:
+ if ((iip->ili_fields & XFS_ILOG_ADATA) &&
+ ip->i_afp->if_bytes > 0) {
+ *nbytes += roundup(ip->i_afp->if_bytes, 4);
+ *nvecs += 1;
+ }
+ break;
+ default:
+ ASSERT(0);
+ break;
+ }
+}
+
+/*
+ * This returns the number of iovecs needed to log the given inode item.
+ *
+ * We need one iovec for the inode log format structure, one for the
+ * inode core, and possibly one for the inode data/extents/b-tree root
+ * and one for the inode attribute data/extents/b-tree root.
+ */
+STATIC void
+xfs_inode_item_size(
+ struct xfs_log_item *lip,
+ int *nvecs,
+ int *nbytes)
+{
+ struct xfs_inode_log_item *iip = INODE_ITEM(lip);
+ struct xfs_inode *ip = iip->ili_inode;
+
+ *nvecs += 2;
+ *nbytes += sizeof(struct xfs_inode_log_format) +
+ xfs_log_dinode_size(ip->i_d.di_version);
+
+ xfs_inode_item_data_fork_size(iip, nvecs, nbytes);
+ if (XFS_IFORK_Q(ip))
+ xfs_inode_item_attr_fork_size(iip, nvecs, nbytes);
+}
+
+STATIC void
+xfs_inode_item_format_data_fork(
+ struct xfs_inode_log_item *iip,
+ struct xfs_inode_log_format *ilf,
+ struct xfs_log_vec *lv,
+ struct xfs_log_iovec **vecp)
+{
+ struct xfs_inode *ip = iip->ili_inode;
+ size_t data_bytes;
+
+ switch (ip->i_d.di_format) {
+ case XFS_DINODE_FMT_EXTENTS:
+ iip->ili_fields &=
+ ~(XFS_ILOG_DDATA | XFS_ILOG_DBROOT | XFS_ILOG_DEV);
+
+ if ((iip->ili_fields & XFS_ILOG_DEXT) &&
+ ip->i_d.di_nextents > 0 &&
+ ip->i_df.if_bytes > 0) {
+ struct xfs_bmbt_rec *p;
+
+ ASSERT(xfs_iext_count(&ip->i_df) > 0);
+
+ p = xlog_prepare_iovec(lv, vecp, XLOG_REG_TYPE_IEXT);
+ data_bytes = xfs_iextents_copy(ip, p, XFS_DATA_FORK);
+ xlog_finish_iovec(lv, *vecp, data_bytes);
+
+ ASSERT(data_bytes <= ip->i_df.if_bytes);
+
+ ilf->ilf_dsize = data_bytes;
+ ilf->ilf_size++;
+ } else {
+ iip->ili_fields &= ~XFS_ILOG_DEXT;
+ }
+ break;
+ case XFS_DINODE_FMT_BTREE:
+ iip->ili_fields &=
+ ~(XFS_ILOG_DDATA | XFS_ILOG_DEXT | XFS_ILOG_DEV);
+
+ if ((iip->ili_fields & XFS_ILOG_DBROOT) &&
+ ip->i_df.if_broot_bytes > 0) {
+ ASSERT(ip->i_df.if_broot != NULL);
+ xlog_copy_iovec(lv, vecp, XLOG_REG_TYPE_IBROOT,
+ ip->i_df.if_broot,
+ ip->i_df.if_broot_bytes);
+ ilf->ilf_dsize = ip->i_df.if_broot_bytes;
+ ilf->ilf_size++;
+ } else {
+ ASSERT(!(iip->ili_fields &
+ XFS_ILOG_DBROOT));
+ iip->ili_fields &= ~XFS_ILOG_DBROOT;
+ }
+ break;
+ case XFS_DINODE_FMT_LOCAL:
+ iip->ili_fields &=
+ ~(XFS_ILOG_DEXT | XFS_ILOG_DBROOT | XFS_ILOG_DEV);
+ if ((iip->ili_fields & XFS_ILOG_DDATA) &&
+ ip->i_df.if_bytes > 0) {
+ /*
+ * Round i_bytes up to a word boundary.
+ * The underlying memory is guaranteed to
+ * to be there by xfs_idata_realloc().
+ */
+ data_bytes = roundup(ip->i_df.if_bytes, 4);
+ ASSERT(ip->i_df.if_u1.if_data != NULL);
+ ASSERT(ip->i_d.di_size > 0);
+ xlog_copy_iovec(lv, vecp, XLOG_REG_TYPE_ILOCAL,
+ ip->i_df.if_u1.if_data, data_bytes);
+ ilf->ilf_dsize = (unsigned)data_bytes;
+ ilf->ilf_size++;
+ } else {
+ iip->ili_fields &= ~XFS_ILOG_DDATA;
+ }
+ break;
+ case XFS_DINODE_FMT_DEV:
+ iip->ili_fields &=
+ ~(XFS_ILOG_DDATA | XFS_ILOG_DBROOT | XFS_ILOG_DEXT);
+ if (iip->ili_fields & XFS_ILOG_DEV)
+ ilf->ilf_u.ilfu_rdev = sysv_encode_dev(VFS_I(ip)->i_rdev);
+ break;
+ default:
+ ASSERT(0);
+ break;
+ }
+}
+
+STATIC void
+xfs_inode_item_format_attr_fork(
+ struct xfs_inode_log_item *iip,
+ struct xfs_inode_log_format *ilf,
+ struct xfs_log_vec *lv,
+ struct xfs_log_iovec **vecp)
+{
+ struct xfs_inode *ip = iip->ili_inode;
+ size_t data_bytes;
+
+ switch (ip->i_d.di_aformat) {
+ case XFS_DINODE_FMT_EXTENTS:
+ iip->ili_fields &=
+ ~(XFS_ILOG_ADATA | XFS_ILOG_ABROOT);
+
+ if ((iip->ili_fields & XFS_ILOG_AEXT) &&
+ ip->i_d.di_anextents > 0 &&
+ ip->i_afp->if_bytes > 0) {
+ struct xfs_bmbt_rec *p;
+
+ ASSERT(xfs_iext_count(ip->i_afp) ==
+ ip->i_d.di_anextents);
+
+ p = xlog_prepare_iovec(lv, vecp, XLOG_REG_TYPE_IATTR_EXT);
+ data_bytes = xfs_iextents_copy(ip, p, XFS_ATTR_FORK);
+ xlog_finish_iovec(lv, *vecp, data_bytes);
+
+ ilf->ilf_asize = data_bytes;
+ ilf->ilf_size++;
+ } else {
+ iip->ili_fields &= ~XFS_ILOG_AEXT;
+ }
+ break;
+ case XFS_DINODE_FMT_BTREE:
+ iip->ili_fields &=
+ ~(XFS_ILOG_ADATA | XFS_ILOG_AEXT);
+
+ if ((iip->ili_fields & XFS_ILOG_ABROOT) &&
+ ip->i_afp->if_broot_bytes > 0) {
+ ASSERT(ip->i_afp->if_broot != NULL);
+
+ xlog_copy_iovec(lv, vecp, XLOG_REG_TYPE_IATTR_BROOT,
+ ip->i_afp->if_broot,
+ ip->i_afp->if_broot_bytes);
+ ilf->ilf_asize = ip->i_afp->if_broot_bytes;
+ ilf->ilf_size++;
+ } else {
+ iip->ili_fields &= ~XFS_ILOG_ABROOT;
+ }
+ break;
+ case XFS_DINODE_FMT_LOCAL:
+ iip->ili_fields &=
+ ~(XFS_ILOG_AEXT | XFS_ILOG_ABROOT);
+
+ if ((iip->ili_fields & XFS_ILOG_ADATA) &&
+ ip->i_afp->if_bytes > 0) {
+ /*
+ * Round i_bytes up to a word boundary.
+ * The underlying memory is guaranteed to
+ * to be there by xfs_idata_realloc().
+ */
+ data_bytes = roundup(ip->i_afp->if_bytes, 4);
+ ASSERT(ip->i_afp->if_u1.if_data != NULL);
+ xlog_copy_iovec(lv, vecp, XLOG_REG_TYPE_IATTR_LOCAL,
+ ip->i_afp->if_u1.if_data,
+ data_bytes);
+ ilf->ilf_asize = (unsigned)data_bytes;
+ ilf->ilf_size++;
+ } else {
+ iip->ili_fields &= ~XFS_ILOG_ADATA;
+ }
+ break;
+ default:
+ ASSERT(0);
+ break;
+ }
+}
+
+static void
+xfs_inode_to_log_dinode(
+ struct xfs_inode *ip,
+ struct xfs_log_dinode *to,
+ xfs_lsn_t lsn)
+{
+ struct xfs_icdinode *from = &ip->i_d;
+ struct inode *inode = VFS_I(ip);
+
+ to->di_magic = XFS_DINODE_MAGIC;
+
+ to->di_version = from->di_version;
+ to->di_format = from->di_format;
+ to->di_uid = from->di_uid;
+ to->di_gid = from->di_gid;
+ to->di_projid_lo = from->di_projid_lo;
+ to->di_projid_hi = from->di_projid_hi;
+
+ memset(to->di_pad, 0, sizeof(to->di_pad));
+ memset(to->di_pad3, 0, sizeof(to->di_pad3));
+ to->di_atime.t_sec = inode->i_atime.tv_sec;
+ to->di_atime.t_nsec = inode->i_atime.tv_nsec;
+ to->di_mtime.t_sec = inode->i_mtime.tv_sec;
+ to->di_mtime.t_nsec = inode->i_mtime.tv_nsec;
+ to->di_ctime.t_sec = inode->i_ctime.tv_sec;
+ to->di_ctime.t_nsec = inode->i_ctime.tv_nsec;
+ to->di_nlink = inode->i_nlink;
+ to->di_gen = inode->i_generation;
+ to->di_mode = inode->i_mode;
+
+ to->di_size = from->di_size;
+ to->di_nblocks = from->di_nblocks;
+ to->di_extsize = from->di_extsize;
+ to->di_nextents = from->di_nextents;
+ to->di_anextents = from->di_anextents;
+ to->di_forkoff = from->di_forkoff;
+ to->di_aformat = from->di_aformat;
+ to->di_dmevmask = from->di_dmevmask;
+ to->di_dmstate = from->di_dmstate;
+ to->di_flags = from->di_flags;
+
+ /* log a dummy value to ensure log structure is fully initialised */
+ to->di_next_unlinked = NULLAGINO;
+
+ if (from->di_version == 3) {
+ to->di_changecount = inode_peek_iversion(inode);
+ to->di_crtime.t_sec = from->di_crtime.t_sec;
+ to->di_crtime.t_nsec = from->di_crtime.t_nsec;
+ to->di_flags2 = from->di_flags2;
+ to->di_cowextsize = from->di_cowextsize;
+ to->di_ino = ip->i_ino;
+ to->di_lsn = lsn;
+ memset(to->di_pad2, 0, sizeof(to->di_pad2));
+ uuid_copy(&to->di_uuid, &ip->i_mount->m_sb.sb_meta_uuid);
+ to->di_flushiter = 0;
+ } else {
+ to->di_flushiter = from->di_flushiter;
+ }
+}
+
+/*
+ * Format the inode core. Current timestamp data is only in the VFS inode
+ * fields, so we need to grab them from there. Hence rather than just copying
+ * the XFS inode core structure, format the fields directly into the iovec.
+ */
+static void
+xfs_inode_item_format_core(
+ struct xfs_inode *ip,
+ struct xfs_log_vec *lv,
+ struct xfs_log_iovec **vecp)
+{
+ struct xfs_log_dinode *dic;
+
+ dic = xlog_prepare_iovec(lv, vecp, XLOG_REG_TYPE_ICORE);
+ xfs_inode_to_log_dinode(ip, dic, ip->i_itemp->ili_item.li_lsn);
+ xlog_finish_iovec(lv, *vecp, xfs_log_dinode_size(ip->i_d.di_version));
+}
+
+/*
+ * This is called to fill in the vector of log iovecs for the given inode
+ * log item. It fills the first item with an inode log format structure,
+ * the second with the on-disk inode structure, and a possible third and/or
+ * fourth with the inode data/extents/b-tree root and inode attributes
+ * data/extents/b-tree root.
+ *
+ * Note: Always use the 64 bit inode log format structure so we don't
+ * leave an uninitialised hole in the format item on 64 bit systems. Log
+ * recovery on 32 bit systems handles this just fine, so there's no reason
+ * for not using an initialising the properly padded structure all the time.
+ */
+STATIC void
+xfs_inode_item_format(
+ struct xfs_log_item *lip,
+ struct xfs_log_vec *lv)
+{
+ struct xfs_inode_log_item *iip = INODE_ITEM(lip);
+ struct xfs_inode *ip = iip->ili_inode;
+ struct xfs_log_iovec *vecp = NULL;
+ struct xfs_inode_log_format *ilf;
+
+ ASSERT(ip->i_d.di_version > 1);
+
+ ilf = xlog_prepare_iovec(lv, &vecp, XLOG_REG_TYPE_IFORMAT);
+ ilf->ilf_type = XFS_LI_INODE;
+ ilf->ilf_ino = ip->i_ino;
+ ilf->ilf_blkno = ip->i_imap.im_blkno;
+ ilf->ilf_len = ip->i_imap.im_len;
+ ilf->ilf_boffset = ip->i_imap.im_boffset;
+ ilf->ilf_fields = XFS_ILOG_CORE;
+ ilf->ilf_size = 2; /* format + core */
+
+ /*
+ * make sure we don't leak uninitialised data into the log in the case
+ * when we don't log every field in the inode.
+ */
+ ilf->ilf_dsize = 0;
+ ilf->ilf_asize = 0;
+ ilf->ilf_pad = 0;
+ memset(&ilf->ilf_u, 0, sizeof(ilf->ilf_u));
+
+ xlog_finish_iovec(lv, vecp, sizeof(*ilf));
+
+ xfs_inode_item_format_core(ip, lv, &vecp);
+ xfs_inode_item_format_data_fork(iip, ilf, lv, &vecp);
+ if (XFS_IFORK_Q(ip)) {
+ xfs_inode_item_format_attr_fork(iip, ilf, lv, &vecp);
+ } else {
+ iip->ili_fields &=
+ ~(XFS_ILOG_ADATA | XFS_ILOG_ABROOT | XFS_ILOG_AEXT);
+ }
+
+ /* update the format with the exact fields we actually logged */
+ ilf->ilf_fields |= (iip->ili_fields & ~XFS_ILOG_TIMESTAMP);
+}
+
+/*
+ * This is called to pin the inode associated with the inode log
+ * item in memory so it cannot be written out.
+ */
+STATIC void
+xfs_inode_item_pin(
+ struct xfs_log_item *lip)
+{
+ struct xfs_inode *ip = INODE_ITEM(lip)->ili_inode;
+
+ ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
+
+ trace_xfs_inode_pin(ip, _RET_IP_);
+ atomic_inc(&ip->i_pincount);
+}
+
+
+/*
+ * This is called to unpin the inode associated with the inode log
+ * item which was previously pinned with a call to xfs_inode_item_pin().
+ *
+ * Also wake up anyone in xfs_iunpin_wait() if the count goes to 0.
+ */
+STATIC void
+xfs_inode_item_unpin(
+ struct xfs_log_item *lip,
+ int remove)
+{
+ struct xfs_inode *ip = INODE_ITEM(lip)->ili_inode;
+
+ trace_xfs_inode_unpin(ip, _RET_IP_);
+ ASSERT(atomic_read(&ip->i_pincount) > 0);
+ if (atomic_dec_and_test(&ip->i_pincount))
+ wake_up_bit(&ip->i_flags, __XFS_IPINNED_BIT);
+}
+
+/*
+ * Callback used to mark a buffer with XFS_LI_FAILED when items in the buffer
+ * have been failed during writeback
+ *
+ * This informs the AIL that the inode is already flush locked on the next push,
+ * and acquires a hold on the buffer to ensure that it isn't reclaimed before
+ * dirty data makes it to disk.
+ */
+STATIC void
+xfs_inode_item_error(
+ struct xfs_log_item *lip,
+ struct xfs_buf *bp)
+{
+ ASSERT(xfs_isiflocked(INODE_ITEM(lip)->ili_inode));
+ xfs_set_li_failed(lip, bp);
+}
+
+STATIC uint
+xfs_inode_item_push(
+ struct xfs_log_item *lip,
+ struct list_head *buffer_list)
+ __releases(&lip->li_ailp->ail_lock)
+ __acquires(&lip->li_ailp->ail_lock)
+{
+ struct xfs_inode_log_item *iip = INODE_ITEM(lip);
+ struct xfs_inode *ip = iip->ili_inode;
+ struct xfs_buf *bp = lip->li_buf;
+ uint rval = XFS_ITEM_SUCCESS;
+ int error;
+
+ if (xfs_ipincount(ip) > 0)
+ return XFS_ITEM_PINNED;
+
+ /*
+ * The buffer containing this item failed to be written back
+ * previously. Resubmit the buffer for IO.
+ */
+ if (test_bit(XFS_LI_FAILED, &lip->li_flags)) {
+ if (!xfs_buf_trylock(bp))
+ return XFS_ITEM_LOCKED;
+
+ if (!xfs_buf_resubmit_failed_buffers(bp, buffer_list))
+ rval = XFS_ITEM_FLUSHING;
+
+ xfs_buf_unlock(bp);
+ return rval;
+ }
+
+ if (!xfs_ilock_nowait(ip, XFS_ILOCK_SHARED))
+ return XFS_ITEM_LOCKED;
+
+ /*
+ * Re-check the pincount now that we stabilized the value by
+ * taking the ilock.
+ */
+ if (xfs_ipincount(ip) > 0) {
+ rval = XFS_ITEM_PINNED;
+ goto out_unlock;
+ }
+
+ /*
+ * Stale inode items should force out the iclog.
+ */
+ if (ip->i_flags & XFS_ISTALE) {
+ rval = XFS_ITEM_PINNED;
+ goto out_unlock;
+ }
+
+ /*
+ * Someone else is already flushing the inode. Nothing we can do
+ * here but wait for the flush to finish and remove the item from
+ * the AIL.
+ */
+ if (!xfs_iflock_nowait(ip)) {
+ rval = XFS_ITEM_FLUSHING;
+ goto out_unlock;
+ }
+
+ ASSERT(iip->ili_fields != 0 || XFS_FORCED_SHUTDOWN(ip->i_mount));
+ ASSERT(iip->ili_logged == 0 || XFS_FORCED_SHUTDOWN(ip->i_mount));
+
+ spin_unlock(&lip->li_ailp->ail_lock);
+
+ error = xfs_iflush(ip, &bp);
+ if (!error) {
+ if (!xfs_buf_delwri_queue(bp, buffer_list))
+ rval = XFS_ITEM_FLUSHING;
+ xfs_buf_relse(bp);
+ }
+
+ spin_lock(&lip->li_ailp->ail_lock);
+out_unlock:
+ xfs_iunlock(ip, XFS_ILOCK_SHARED);
+ return rval;
+}
+
+/*
+ * Unlock the inode associated with the inode log item.
+ */
+STATIC void
+xfs_inode_item_unlock(
+ struct xfs_log_item *lip)
+{
+ struct xfs_inode_log_item *iip = INODE_ITEM(lip);
+ struct xfs_inode *ip = iip->ili_inode;
+ unsigned short lock_flags;
+
+ ASSERT(ip->i_itemp != NULL);
+ ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
+
+ lock_flags = iip->ili_lock_flags;
+ iip->ili_lock_flags = 0;
+ if (lock_flags)
+ xfs_iunlock(ip, lock_flags);
+}
+
+/*
+ * This is called to find out where the oldest active copy of the inode log
+ * item in the on disk log resides now that the last log write of it completed
+ * at the given lsn. Since we always re-log all dirty data in an inode, the
+ * latest copy in the on disk log is the only one that matters. Therefore,
+ * simply return the given lsn.
+ *
+ * If the inode has been marked stale because the cluster is being freed, we
+ * don't want to (re-)insert this inode into the AIL. There is a race condition
+ * where the cluster buffer may be unpinned before the inode is inserted into
+ * the AIL during transaction committed processing. If the buffer is unpinned
+ * before the inode item has been committed and inserted, then it is possible
+ * for the buffer to be written and IO completes before the inode is inserted
+ * into the AIL. In that case, we'd be inserting a clean, stale inode into the
+ * AIL which will never get removed. It will, however, get reclaimed which
+ * triggers an assert in xfs_inode_free() complaining about freein an inode
+ * still in the AIL.
+ *
+ * To avoid this, just unpin the inode directly and return a LSN of -1 so the
+ * transaction committed code knows that it does not need to do any further
+ * processing on the item.
+ */
+STATIC xfs_lsn_t
+xfs_inode_item_committed(
+ struct xfs_log_item *lip,
+ xfs_lsn_t lsn)
+{
+ struct xfs_inode_log_item *iip = INODE_ITEM(lip);
+ struct xfs_inode *ip = iip->ili_inode;
+
+ if (xfs_iflags_test(ip, XFS_ISTALE)) {
+ xfs_inode_item_unpin(lip, 0);
+ return -1;
+ }
+ return lsn;
+}
+
+STATIC void
+xfs_inode_item_committing(
+ struct xfs_log_item *lip,
+ xfs_lsn_t lsn)
+{
+ INODE_ITEM(lip)->ili_last_lsn = lsn;
+}
+
+/*
+ * This is the ops vector shared by all buf log items.
+ */
+static const struct xfs_item_ops xfs_inode_item_ops = {
+ .iop_size = xfs_inode_item_size,
+ .iop_format = xfs_inode_item_format,
+ .iop_pin = xfs_inode_item_pin,
+ .iop_unpin = xfs_inode_item_unpin,
+ .iop_unlock = xfs_inode_item_unlock,
+ .iop_committed = xfs_inode_item_committed,
+ .iop_push = xfs_inode_item_push,
+ .iop_committing = xfs_inode_item_committing,
+ .iop_error = xfs_inode_item_error
+};
+
+
+/*
+ * Initialize the inode log item for a newly allocated (in-core) inode.
+ */
+void
+xfs_inode_item_init(
+ struct xfs_inode *ip,
+ struct xfs_mount *mp)
+{
+ struct xfs_inode_log_item *iip;
+
+ ASSERT(ip->i_itemp == NULL);
+ iip = ip->i_itemp = kmem_zone_zalloc(xfs_ili_zone, KM_SLEEP);
+
+ iip->ili_inode = ip;
+ xfs_log_item_init(mp, &iip->ili_item, XFS_LI_INODE,
+ &xfs_inode_item_ops);
+}
+
+/*
+ * Free the inode log item and any memory hanging off of it.
+ */
+void
+xfs_inode_item_destroy(
+ xfs_inode_t *ip)
+{
+ kmem_free(ip->i_itemp->ili_item.li_lv_shadow);
+ kmem_zone_free(xfs_ili_zone, ip->i_itemp);
+}
+
+
+/*
+ * This is the inode flushing I/O completion routine. It is called
+ * from interrupt level when the buffer containing the inode is
+ * flushed to disk. It is responsible for removing the inode item
+ * from the AIL if it has not been re-logged, and unlocking the inode's
+ * flush lock.
+ *
+ * To reduce AIL lock traffic as much as possible, we scan the buffer log item
+ * list for other inodes that will run this function. We remove them from the
+ * buffer list so we can process all the inode IO completions in one AIL lock
+ * traversal.
+ */
+void
+xfs_iflush_done(
+ struct xfs_buf *bp,
+ struct xfs_log_item *lip)
+{
+ struct xfs_inode_log_item *iip;
+ struct xfs_log_item *blip, *n;
+ struct xfs_ail *ailp = lip->li_ailp;
+ int need_ail = 0;
+ LIST_HEAD(tmp);
+
+ /*
+ * Scan the buffer IO completions for other inodes being completed and
+ * attach them to the current inode log item.
+ */
+
+ list_add_tail(&lip->li_bio_list, &tmp);
+
+ list_for_each_entry_safe(blip, n, &bp->b_li_list, li_bio_list) {
+ if (lip->li_cb != xfs_iflush_done)
+ continue;
+
+ list_move_tail(&blip->li_bio_list, &tmp);
+ /*
+ * while we have the item, do the unlocked check for needing
+ * the AIL lock.
+ */
+ iip = INODE_ITEM(blip);
+ if ((iip->ili_logged && blip->li_lsn == iip->ili_flush_lsn) ||
+ test_bit(XFS_LI_FAILED, &blip->li_flags))
+ need_ail++;
+ }
+
+ /* make sure we capture the state of the initial inode. */
+ iip = INODE_ITEM(lip);
+ if ((iip->ili_logged && lip->li_lsn == iip->ili_flush_lsn) ||
+ test_bit(XFS_LI_FAILED, &lip->li_flags))
+ need_ail++;
+
+ /*
+ * We only want to pull the item from the AIL if it is
+ * actually there and its location in the log has not
+ * changed since we started the flush. Thus, we only bother
+ * if the ili_logged flag is set and the inode's lsn has not
+ * changed. First we check the lsn outside
+ * the lock since it's cheaper, and then we recheck while
+ * holding the lock before removing the inode from the AIL.
+ */
+ if (need_ail) {
+ bool mlip_changed = false;
+
+ /* this is an opencoded batch version of xfs_trans_ail_delete */
+ spin_lock(&ailp->ail_lock);
+ list_for_each_entry(blip, &tmp, li_bio_list) {
+ if (INODE_ITEM(blip)->ili_logged &&
+ blip->li_lsn == INODE_ITEM(blip)->ili_flush_lsn)
+ mlip_changed |= xfs_ail_delete_one(ailp, blip);
+ else {
+ xfs_clear_li_failed(blip);
+ }
+ }
+
+ if (mlip_changed) {
+ if (!XFS_FORCED_SHUTDOWN(ailp->ail_mount))
+ xlog_assign_tail_lsn_locked(ailp->ail_mount);
+ if (list_empty(&ailp->ail_head))
+ wake_up_all(&ailp->ail_empty);
+ }
+ spin_unlock(&ailp->ail_lock);
+
+ if (mlip_changed)
+ xfs_log_space_wake(ailp->ail_mount);
+ }
+
+ /*
+ * clean up and unlock the flush lock now we are done. We can clear the
+ * ili_last_fields bits now that we know that the data corresponding to
+ * them is safely on disk.
+ */
+ list_for_each_entry_safe(blip, n, &tmp, li_bio_list) {
+ list_del_init(&blip->li_bio_list);
+ iip = INODE_ITEM(blip);
+ iip->ili_logged = 0;
+ iip->ili_last_fields = 0;
+ xfs_ifunlock(iip->ili_inode);
+ }
+ list_del(&tmp);
+}
+
+/*
+ * This is the inode flushing abort routine. It is called from xfs_iflush when
+ * the filesystem is shutting down to clean up the inode state. It is
+ * responsible for removing the inode item from the AIL if it has not been
+ * re-logged, and unlocking the inode's flush lock.
+ */
+void
+xfs_iflush_abort(
+ xfs_inode_t *ip,
+ bool stale)
+{
+ xfs_inode_log_item_t *iip = ip->i_itemp;
+
+ if (iip) {
+ if (test_bit(XFS_LI_IN_AIL, &iip->ili_item.li_flags)) {
+ xfs_trans_ail_remove(&iip->ili_item,
+ stale ? SHUTDOWN_LOG_IO_ERROR :
+ SHUTDOWN_CORRUPT_INCORE);
+ }
+ iip->ili_logged = 0;
+ /*
+ * Clear the ili_last_fields bits now that we know that the
+ * data corresponding to them is safely on disk.
+ */
+ iip->ili_last_fields = 0;
+ /*
+ * Clear the inode logging fields so no more flushes are
+ * attempted.
+ */
+ iip->ili_fields = 0;
+ iip->ili_fsync_fields = 0;
+ }
+ /*
+ * Release the inode's flush lock since we're done with it.
+ */
+ xfs_ifunlock(ip);
+}
+
+void
+xfs_istale_done(
+ struct xfs_buf *bp,
+ struct xfs_log_item *lip)
+{
+ xfs_iflush_abort(INODE_ITEM(lip)->ili_inode, true);
+}
+
+/*
+ * convert an xfs_inode_log_format struct from the old 32 bit version
+ * (which can have different field alignments) to the native 64 bit version
+ */
+int
+xfs_inode_item_format_convert(
+ struct xfs_log_iovec *buf,
+ struct xfs_inode_log_format *in_f)
+{
+ struct xfs_inode_log_format_32 *in_f32 = buf->i_addr;
+
+ if (buf->i_len != sizeof(*in_f32))
+ return -EFSCORRUPTED;
+
+ in_f->ilf_type = in_f32->ilf_type;
+ in_f->ilf_size = in_f32->ilf_size;
+ in_f->ilf_fields = in_f32->ilf_fields;
+ in_f->ilf_asize = in_f32->ilf_asize;
+ in_f->ilf_dsize = in_f32->ilf_dsize;
+ in_f->ilf_ino = in_f32->ilf_ino;
+ memcpy(&in_f->ilf_u, &in_f32->ilf_u, sizeof(in_f->ilf_u));
+ in_f->ilf_blkno = in_f32->ilf_blkno;
+ in_f->ilf_len = in_f32->ilf_len;
+ in_f->ilf_boffset = in_f32->ilf_boffset;
+ return 0;
+}