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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /fs/xfs/xfs_inode_item.c
Initial import
Diffstat (limited to 'fs/xfs/xfs_inode_item.c')
-rw-r--r--fs/xfs/xfs_inode_item.c789
1 files changed, 789 insertions, 0 deletions
diff --git a/fs/xfs/xfs_inode_item.c b/fs/xfs/xfs_inode_item.c
new file mode 100644
index 000000000..bf13a5a7e
--- /dev/null
+++ b/fs/xfs/xfs_inode_item.c
@@ -0,0 +1,789 @@
+/*
+ * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
+ * All Rights Reserved.
+ *
+ * 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.
+ *
+ * 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_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_log.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:
+ case XFS_DINODE_FMT_UUID:
+ 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_icdinode_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 | XFS_ILOG_UUID);
+
+ 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(ip->i_df.if_u1.if_extents != NULL);
+ ASSERT(ip->i_df.if_bytes / sizeof(xfs_bmbt_rec_t) > 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 | XFS_ILOG_UUID);
+
+ 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 | XFS_ILOG_UUID);
+ 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_real_bytes == 0 ||
+ ip->i_df.if_real_bytes == data_bytes);
+ 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 | XFS_ILOG_UUID);
+ if (iip->ili_fields & XFS_ILOG_DEV)
+ ilf->ilf_u.ilfu_rdev = ip->i_df.if_u2.if_rdev;
+ break;
+ case XFS_DINODE_FMT_UUID:
+ iip->ili_fields &=
+ ~(XFS_ILOG_DDATA | XFS_ILOG_DBROOT |
+ XFS_ILOG_DEXT | XFS_ILOG_DEV);
+ if (iip->ili_fields & XFS_ILOG_UUID)
+ ilf->ilf_u.ilfu_uuid = ip->i_df.if_u2.if_uuid;
+ 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(ip->i_afp->if_bytes / sizeof(xfs_bmbt_rec_t) ==
+ ip->i_d.di_anextents);
+ ASSERT(ip->i_afp->if_u1.if_extents != NULL);
+
+ 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_real_bytes == 0 ||
+ ip->i_afp->if_real_bytes == data_bytes);
+ 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;
+ }
+}
+
+/*
+ * 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.
+ */
+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_inode_log_format *ilf;
+ struct xfs_log_iovec *vecp = NULL;
+
+ 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 */
+ xlog_finish_iovec(lv, vecp, sizeof(struct xfs_inode_log_format));
+
+ xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ICORE,
+ &ip->i_d,
+ xfs_icdinode_size(ip->i_d.di_version));
+
+ 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);
+}
+
+STATIC uint
+xfs_inode_item_push(
+ struct xfs_log_item *lip,
+ struct list_head *buffer_list)
+{
+ struct xfs_inode_log_item *iip = INODE_ITEM(lip);
+ struct xfs_inode *ip = iip->ili_inode;
+ struct xfs_buf *bp = NULL;
+ uint rval = XFS_ITEM_SUCCESS;
+ int error;
+
+ if (xfs_ipincount(ip) > 0)
+ return XFS_ITEM_PINNED;
+
+ 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->xa_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->xa_lock);
+out_unlock:
+ xfs_iunlock(ip, XFS_ILOCK_SHARED);
+ return rval;
+}
+
+/*
+ * Unlock the inode associated with the inode log item.
+ * Clear the fields of the inode and inode log item that
+ * are specific to the current transaction. If the
+ * hold flags is set, do not unlock the inode.
+ */
+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;
+}
+
+/*
+ * XXX rcc - this one really has to do something. Probably needs
+ * to stamp in a new field in the incore inode.
+ */
+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
+};
+
+
+/*
+ * 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_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;
+ struct xfs_log_item *next;
+ struct xfs_log_item *prev;
+ struct xfs_ail *ailp = lip->li_ailp;
+ int need_ail = 0;
+
+ /*
+ * Scan the buffer IO completions for other inodes being completed and
+ * attach them to the current inode log item.
+ */
+ blip = bp->b_fspriv;
+ prev = NULL;
+ while (blip != NULL) {
+ if (blip->li_cb != xfs_iflush_done) {
+ prev = blip;
+ blip = blip->li_bio_list;
+ continue;
+ }
+
+ /* remove from list */
+ next = blip->li_bio_list;
+ if (!prev) {
+ bp->b_fspriv = next;
+ } else {
+ prev->li_bio_list = next;
+ }
+
+ /* add to current list */
+ blip->li_bio_list = lip->li_bio_list;
+ lip->li_bio_list = blip;
+
+ /*
+ * 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)
+ need_ail++;
+
+ blip = next;
+ }
+
+ /* 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)
+ 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) {
+ struct xfs_log_item *log_items[need_ail];
+ int i = 0;
+ spin_lock(&ailp->xa_lock);
+ for (blip = lip; blip; blip = blip->li_bio_list) {
+ iip = INODE_ITEM(blip);
+ if (iip->ili_logged &&
+ blip->li_lsn == iip->ili_flush_lsn) {
+ log_items[i++] = blip;
+ }
+ ASSERT(i <= need_ail);
+ }
+ /* xfs_trans_ail_delete_bulk() drops the AIL lock. */
+ xfs_trans_ail_delete_bulk(ailp, log_items, i,
+ SHUTDOWN_CORRUPT_INCORE);
+ }
+
+
+ /*
+ * 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.
+ */
+ for (blip = lip; blip; blip = next) {
+ next = blip->li_bio_list;
+ blip->li_bio_list = NULL;
+
+ iip = INODE_ITEM(blip);
+ iip->ili_logged = 0;
+ iip->ili_last_fields = 0;
+ xfs_ifunlock(iip->ili_inode);
+ }
+}
+
+/*
+ * 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) {
+ struct xfs_ail *ailp = iip->ili_item.li_ailp;
+ if (iip->ili_item.li_flags & XFS_LI_IN_AIL) {
+ spin_lock(&ailp->xa_lock);
+ if (iip->ili_item.li_flags & XFS_LI_IN_AIL) {
+ /* xfs_trans_ail_delete() drops the AIL lock. */
+ xfs_trans_ail_delete(ailp, &iip->ili_item,
+ stale ?
+ SHUTDOWN_LOG_IO_ERROR :
+ SHUTDOWN_CORRUPT_INCORE);
+ } else
+ spin_unlock(&ailp->xa_lock);
+ }
+ 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;
+ }
+ /*
+ * 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 either 32 or 64 bit versions
+ * (which can have different field alignments) to the native version
+ */
+int
+xfs_inode_item_format_convert(
+ xfs_log_iovec_t *buf,
+ xfs_inode_log_format_t *in_f)
+{
+ if (buf->i_len == sizeof(xfs_inode_log_format_32_t)) {
+ xfs_inode_log_format_32_t *in_f32 = buf->i_addr;
+
+ 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;
+ /* copy biggest field of ilf_u */
+ memcpy(in_f->ilf_u.ilfu_uuid.__u_bits,
+ in_f32->ilf_u.ilfu_uuid.__u_bits,
+ sizeof(uuid_t));
+ 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;
+ } else if (buf->i_len == sizeof(xfs_inode_log_format_64_t)){
+ xfs_inode_log_format_64_t *in_f64 = buf->i_addr;
+
+ in_f->ilf_type = in_f64->ilf_type;
+ in_f->ilf_size = in_f64->ilf_size;
+ in_f->ilf_fields = in_f64->ilf_fields;
+ in_f->ilf_asize = in_f64->ilf_asize;
+ in_f->ilf_dsize = in_f64->ilf_dsize;
+ in_f->ilf_ino = in_f64->ilf_ino;
+ /* copy biggest field of ilf_u */
+ memcpy(in_f->ilf_u.ilfu_uuid.__u_bits,
+ in_f64->ilf_u.ilfu_uuid.__u_bits,
+ sizeof(uuid_t));
+ in_f->ilf_blkno = in_f64->ilf_blkno;
+ in_f->ilf_len = in_f64->ilf_len;
+ in_f->ilf_boffset = in_f64->ilf_boffset;
+ return 0;
+ }
+ return -EFSCORRUPTED;
+}