Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/fs/xfs/xfs_inode_item.c b/fs/xfs/xfs_inode_item.c
new file mode 100644
index 0000000..768cb18
--- /dev/null
+++ b/fs/xfs/xfs_inode_item.c
@@ -0,0 +1,1092 @@
+/*
+ * Copyright (c) 2000-2002 Silicon Graphics, Inc. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 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.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like. Any license provided herein, whether implied or
+ * otherwise, applies only to this software file. Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA 94043, or:
+ *
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ */
+
+/*
+ * This file contains the implementation of the xfs_inode_log_item.
+ * It contains the item operations used to manipulate the inode log
+ * items as well as utility routines used by the inode specific
+ * transaction routines.
+ */
+#include "xfs.h"
+#include "xfs_macros.h"
+#include "xfs_types.h"
+#include "xfs_inum.h"
+#include "xfs_log.h"
+#include "xfs_trans.h"
+#include "xfs_buf_item.h"
+#include "xfs_sb.h"
+#include "xfs_dir.h"
+#include "xfs_dir2.h"
+#include "xfs_dmapi.h"
+#include "xfs_mount.h"
+#include "xfs_trans_priv.h"
+#include "xfs_ag.h"
+#include "xfs_alloc_btree.h"
+#include "xfs_bmap_btree.h"
+#include "xfs_ialloc_btree.h"
+#include "xfs_btree.h"
+#include "xfs_ialloc.h"
+#include "xfs_attr_sf.h"
+#include "xfs_dir_sf.h"
+#include "xfs_dir2_sf.h"
+#include "xfs_dinode.h"
+#include "xfs_inode_item.h"
+#include "xfs_inode.h"
+#include "xfs_rw.h"
+
+
+kmem_zone_t *xfs_ili_zone; /* inode log item zone */
+
+/*
+ * 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 uint
+xfs_inode_item_size(
+ xfs_inode_log_item_t *iip)
+{
+ uint nvecs;
+ xfs_inode_t *ip;
+
+ ip = iip->ili_inode;
+ nvecs = 2;
+
+ /*
+ * Only log the data/extents/b-tree root if there is something
+ * left to log.
+ */
+ iip->ili_format.ilf_fields |= XFS_ILOG_CORE;
+
+ switch (ip->i_d.di_format) {
+ case XFS_DINODE_FMT_EXTENTS:
+ iip->ili_format.ilf_fields &=
+ ~(XFS_ILOG_DDATA | XFS_ILOG_DBROOT |
+ XFS_ILOG_DEV | XFS_ILOG_UUID);
+ if ((iip->ili_format.ilf_fields & XFS_ILOG_DEXT) &&
+ (ip->i_d.di_nextents > 0) &&
+ (ip->i_df.if_bytes > 0)) {
+ ASSERT(ip->i_df.if_u1.if_extents != NULL);
+ nvecs++;
+ } else {
+ iip->ili_format.ilf_fields &= ~XFS_ILOG_DEXT;
+ }
+ break;
+
+ case XFS_DINODE_FMT_BTREE:
+ ASSERT(ip->i_df.if_ext_max ==
+ XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t));
+ iip->ili_format.ilf_fields &=
+ ~(XFS_ILOG_DDATA | XFS_ILOG_DEXT |
+ XFS_ILOG_DEV | XFS_ILOG_UUID);
+ if ((iip->ili_format.ilf_fields & XFS_ILOG_DBROOT) &&
+ (ip->i_df.if_broot_bytes > 0)) {
+ ASSERT(ip->i_df.if_broot != NULL);
+ nvecs++;
+ } else {
+ ASSERT(!(iip->ili_format.ilf_fields &
+ XFS_ILOG_DBROOT));
+#ifdef XFS_TRANS_DEBUG
+ if (iip->ili_root_size > 0) {
+ ASSERT(iip->ili_root_size ==
+ ip->i_df.if_broot_bytes);
+ ASSERT(memcmp(iip->ili_orig_root,
+ ip->i_df.if_broot,
+ iip->ili_root_size) == 0);
+ } else {
+ ASSERT(ip->i_df.if_broot_bytes == 0);
+ }
+#endif
+ iip->ili_format.ilf_fields &= ~XFS_ILOG_DBROOT;
+ }
+ break;
+
+ case XFS_DINODE_FMT_LOCAL:
+ iip->ili_format.ilf_fields &=
+ ~(XFS_ILOG_DEXT | XFS_ILOG_DBROOT |
+ XFS_ILOG_DEV | XFS_ILOG_UUID);
+ if ((iip->ili_format.ilf_fields & XFS_ILOG_DDATA) &&
+ (ip->i_df.if_bytes > 0)) {
+ ASSERT(ip->i_df.if_u1.if_data != NULL);
+ ASSERT(ip->i_d.di_size > 0);
+ nvecs++;
+ } else {
+ iip->ili_format.ilf_fields &= ~XFS_ILOG_DDATA;
+ }
+ break;
+
+ case XFS_DINODE_FMT_DEV:
+ iip->ili_format.ilf_fields &=
+ ~(XFS_ILOG_DDATA | XFS_ILOG_DBROOT |
+ XFS_ILOG_DEXT | XFS_ILOG_UUID);
+ break;
+
+ case XFS_DINODE_FMT_UUID:
+ iip->ili_format.ilf_fields &=
+ ~(XFS_ILOG_DDATA | XFS_ILOG_DBROOT |
+ XFS_ILOG_DEXT | XFS_ILOG_DEV);
+ break;
+
+ default:
+ ASSERT(0);
+ break;
+ }
+
+ /*
+ * If there are no attributes associated with this file,
+ * then there cannot be anything more to log.
+ * Clear all attribute-related log flags.
+ */
+ if (!XFS_IFORK_Q(ip)) {
+ iip->ili_format.ilf_fields &=
+ ~(XFS_ILOG_ADATA | XFS_ILOG_ABROOT | XFS_ILOG_AEXT);
+ return nvecs;
+ }
+
+ /*
+ * Log any necessary attribute data.
+ */
+ switch (ip->i_d.di_aformat) {
+ case XFS_DINODE_FMT_EXTENTS:
+ iip->ili_format.ilf_fields &=
+ ~(XFS_ILOG_ADATA | XFS_ILOG_ABROOT);
+ if ((iip->ili_format.ilf_fields & XFS_ILOG_AEXT) &&
+ (ip->i_d.di_anextents > 0) &&
+ (ip->i_afp->if_bytes > 0)) {
+ ASSERT(ip->i_afp->if_u1.if_extents != NULL);
+ nvecs++;
+ } else {
+ iip->ili_format.ilf_fields &= ~XFS_ILOG_AEXT;
+ }
+ break;
+
+ case XFS_DINODE_FMT_BTREE:
+ iip->ili_format.ilf_fields &=
+ ~(XFS_ILOG_ADATA | XFS_ILOG_AEXT);
+ if ((iip->ili_format.ilf_fields & XFS_ILOG_ABROOT) &&
+ (ip->i_afp->if_broot_bytes > 0)) {
+ ASSERT(ip->i_afp->if_broot != NULL);
+ nvecs++;
+ } else {
+ iip->ili_format.ilf_fields &= ~XFS_ILOG_ABROOT;
+ }
+ break;
+
+ case XFS_DINODE_FMT_LOCAL:
+ iip->ili_format.ilf_fields &=
+ ~(XFS_ILOG_AEXT | XFS_ILOG_ABROOT);
+ if ((iip->ili_format.ilf_fields & XFS_ILOG_ADATA) &&
+ (ip->i_afp->if_bytes > 0)) {
+ ASSERT(ip->i_afp->if_u1.if_data != NULL);
+ nvecs++;
+ } else {
+ iip->ili_format.ilf_fields &= ~XFS_ILOG_ADATA;
+ }
+ break;
+
+ default:
+ ASSERT(0);
+ break;
+ }
+
+ return nvecs;
+}
+
+/*
+ * 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(
+ xfs_inode_log_item_t *iip,
+ xfs_log_iovec_t *log_vector)
+{
+ uint nvecs;
+ xfs_log_iovec_t *vecp;
+ xfs_inode_t *ip;
+ size_t data_bytes;
+ xfs_bmbt_rec_t *ext_buffer;
+ int nrecs;
+ xfs_mount_t *mp;
+
+ ip = iip->ili_inode;
+ vecp = log_vector;
+
+ vecp->i_addr = (xfs_caddr_t)&iip->ili_format;
+ vecp->i_len = sizeof(xfs_inode_log_format_t);
+ vecp++;
+ nvecs = 1;
+
+ /*
+ * Clear i_update_core if the timestamps (or any other
+ * non-transactional modification) need flushing/logging
+ * and we're about to log them with the rest of the core.
+ *
+ * This is the same logic as xfs_iflush() but this code can't
+ * run at the same time as xfs_iflush because we're in commit
+ * processing here and so we have the inode lock held in
+ * exclusive mode. Although it doesn't really matter
+ * for the timestamps if both routines were to grab the
+ * timestamps or not. That would be ok.
+ *
+ * We clear i_update_core before copying out the data.
+ * This is for coordination with our timestamp updates
+ * that don't hold the inode lock. They will always
+ * update the timestamps BEFORE setting i_update_core,
+ * so if we clear i_update_core after they set it we
+ * are guaranteed to see their updates to the timestamps
+ * either here. Likewise, if they set it after we clear it
+ * here, we'll see it either on the next commit of this
+ * inode or the next time the inode gets flushed via
+ * xfs_iflush(). This depends on strongly ordered memory
+ * semantics, but we have that. We use the SYNCHRONIZE
+ * macro to make sure that the compiler does not reorder
+ * the i_update_core access below the data copy below.
+ */
+ if (ip->i_update_core) {
+ ip->i_update_core = 0;
+ SYNCHRONIZE();
+ }
+
+ /*
+ * We don't have to worry about re-ordering here because
+ * the update_size field is protected by the inode lock
+ * and we have that held in exclusive mode.
+ */
+ if (ip->i_update_size)
+ ip->i_update_size = 0;
+
+ vecp->i_addr = (xfs_caddr_t)&ip->i_d;
+ vecp->i_len = sizeof(xfs_dinode_core_t);
+ vecp++;
+ nvecs++;
+ iip->ili_format.ilf_fields |= XFS_ILOG_CORE;
+
+ /*
+ * If this is really an old format inode, then we need to
+ * log it as such. This means that we have to copy the link
+ * count from the new field to the old. We don't have to worry
+ * about the new fields, because nothing trusts them as long as
+ * the old inode version number is there. If the superblock already
+ * has a new version number, then we don't bother converting back.
+ */
+ mp = ip->i_mount;
+ ASSERT(ip->i_d.di_version == XFS_DINODE_VERSION_1 ||
+ XFS_SB_VERSION_HASNLINK(&mp->m_sb));
+ if (ip->i_d.di_version == XFS_DINODE_VERSION_1) {
+ if (!XFS_SB_VERSION_HASNLINK(&mp->m_sb)) {
+ /*
+ * Convert it back.
+ */
+ ASSERT(ip->i_d.di_nlink <= XFS_MAXLINK_1);
+ ip->i_d.di_onlink = ip->i_d.di_nlink;
+ } else {
+ /*
+ * The superblock version has already been bumped,
+ * so just make the conversion to the new inode
+ * format permanent.
+ */
+ ip->i_d.di_version = XFS_DINODE_VERSION_2;
+ ip->i_d.di_onlink = 0;
+ memset(&(ip->i_d.di_pad[0]), 0, sizeof(ip->i_d.di_pad));
+ }
+ }
+
+ switch (ip->i_d.di_format) {
+ case XFS_DINODE_FMT_EXTENTS:
+ ASSERT(!(iip->ili_format.ilf_fields &
+ (XFS_ILOG_DDATA | XFS_ILOG_DBROOT |
+ XFS_ILOG_DEV | XFS_ILOG_UUID)));
+ if (iip->ili_format.ilf_fields & XFS_ILOG_DEXT) {
+ ASSERT(ip->i_df.if_bytes > 0);
+ ASSERT(ip->i_df.if_u1.if_extents != NULL);
+ ASSERT(ip->i_d.di_nextents > 0);
+ ASSERT(iip->ili_extents_buf == NULL);
+ nrecs = ip->i_df.if_bytes /
+ (uint)sizeof(xfs_bmbt_rec_t);
+ ASSERT(nrecs > 0);
+#if __BYTE_ORDER == __BIG_ENDIAN
+ if (nrecs == ip->i_d.di_nextents) {
+ /*
+ * There are no delayed allocation
+ * extents, so just point to the
+ * real extents array.
+ */
+ vecp->i_addr =
+ (char *)(ip->i_df.if_u1.if_extents);
+ vecp->i_len = ip->i_df.if_bytes;
+ } else
+#endif
+ {
+ /*
+ * There are delayed allocation extents
+ * in the inode, or we need to convert
+ * the extents to on disk format.
+ * Use xfs_iextents_copy()
+ * to copy only the real extents into
+ * a separate buffer. We'll free the
+ * buffer in the unlock routine.
+ */
+ ext_buffer = kmem_alloc(ip->i_df.if_bytes,
+ KM_SLEEP);
+ iip->ili_extents_buf = ext_buffer;
+ vecp->i_addr = (xfs_caddr_t)ext_buffer;
+ vecp->i_len = xfs_iextents_copy(ip, ext_buffer,
+ XFS_DATA_FORK);
+ }
+ ASSERT(vecp->i_len <= ip->i_df.if_bytes);
+ iip->ili_format.ilf_dsize = vecp->i_len;
+ vecp++;
+ nvecs++;
+ }
+ break;
+
+ case XFS_DINODE_FMT_BTREE:
+ ASSERT(!(iip->ili_format.ilf_fields &
+ (XFS_ILOG_DDATA | XFS_ILOG_DEXT |
+ XFS_ILOG_DEV | XFS_ILOG_UUID)));
+ if (iip->ili_format.ilf_fields & XFS_ILOG_DBROOT) {
+ ASSERT(ip->i_df.if_broot_bytes > 0);
+ ASSERT(ip->i_df.if_broot != NULL);
+ vecp->i_addr = (xfs_caddr_t)ip->i_df.if_broot;
+ vecp->i_len = ip->i_df.if_broot_bytes;
+ vecp++;
+ nvecs++;
+ iip->ili_format.ilf_dsize = ip->i_df.if_broot_bytes;
+ }
+ break;
+
+ case XFS_DINODE_FMT_LOCAL:
+ ASSERT(!(iip->ili_format.ilf_fields &
+ (XFS_ILOG_DBROOT | XFS_ILOG_DEXT |
+ XFS_ILOG_DEV | XFS_ILOG_UUID)));
+ if (iip->ili_format.ilf_fields & XFS_ILOG_DDATA) {
+ ASSERT(ip->i_df.if_bytes > 0);
+ ASSERT(ip->i_df.if_u1.if_data != NULL);
+ ASSERT(ip->i_d.di_size > 0);
+
+ vecp->i_addr = (xfs_caddr_t)ip->i_df.if_u1.if_data;
+ /*
+ * 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));
+ vecp->i_len = (int)data_bytes;
+ vecp++;
+ nvecs++;
+ iip->ili_format.ilf_dsize = (unsigned)data_bytes;
+ }
+ break;
+
+ case XFS_DINODE_FMT_DEV:
+ ASSERT(!(iip->ili_format.ilf_fields &
+ (XFS_ILOG_DBROOT | XFS_ILOG_DEXT |
+ XFS_ILOG_DDATA | XFS_ILOG_UUID)));
+ if (iip->ili_format.ilf_fields & XFS_ILOG_DEV) {
+ iip->ili_format.ilf_u.ilfu_rdev =
+ ip->i_df.if_u2.if_rdev;
+ }
+ break;
+
+ case XFS_DINODE_FMT_UUID:
+ ASSERT(!(iip->ili_format.ilf_fields &
+ (XFS_ILOG_DBROOT | XFS_ILOG_DEXT |
+ XFS_ILOG_DDATA | XFS_ILOG_DEV)));
+ if (iip->ili_format.ilf_fields & XFS_ILOG_UUID) {
+ iip->ili_format.ilf_u.ilfu_uuid =
+ ip->i_df.if_u2.if_uuid;
+ }
+ break;
+
+ default:
+ ASSERT(0);
+ break;
+ }
+
+ /*
+ * If there are no attributes associated with the file,
+ * then we're done.
+ * Assert that no attribute-related log flags are set.
+ */
+ if (!XFS_IFORK_Q(ip)) {
+ ASSERT(nvecs == iip->ili_item.li_desc->lid_size);
+ iip->ili_format.ilf_size = nvecs;
+ ASSERT(!(iip->ili_format.ilf_fields &
+ (XFS_ILOG_ADATA | XFS_ILOG_ABROOT | XFS_ILOG_AEXT)));
+ return;
+ }
+
+ switch (ip->i_d.di_aformat) {
+ case XFS_DINODE_FMT_EXTENTS:
+ ASSERT(!(iip->ili_format.ilf_fields &
+ (XFS_ILOG_ADATA | XFS_ILOG_ABROOT)));
+ if (iip->ili_format.ilf_fields & XFS_ILOG_AEXT) {
+ ASSERT(ip->i_afp->if_bytes > 0);
+ ASSERT(ip->i_afp->if_u1.if_extents != NULL);
+ ASSERT(ip->i_d.di_anextents > 0);
+#ifdef DEBUG
+ nrecs = ip->i_afp->if_bytes /
+ (uint)sizeof(xfs_bmbt_rec_t);
+#endif
+ ASSERT(nrecs > 0);
+ ASSERT(nrecs == ip->i_d.di_anextents);
+#if __BYTE_ORDER == __BIG_ENDIAN
+ /*
+ * There are not delayed allocation extents
+ * for attributes, so just point at the array.
+ */
+ vecp->i_addr = (char *)(ip->i_afp->if_u1.if_extents);
+ vecp->i_len = ip->i_afp->if_bytes;
+#else
+ ASSERT(iip->ili_aextents_buf == NULL);
+ /*
+ * Need to endian flip before logging
+ */
+ ext_buffer = kmem_alloc(ip->i_afp->if_bytes,
+ KM_SLEEP);
+ iip->ili_aextents_buf = ext_buffer;
+ vecp->i_addr = (xfs_caddr_t)ext_buffer;
+ vecp->i_len = xfs_iextents_copy(ip, ext_buffer,
+ XFS_ATTR_FORK);
+#endif
+ iip->ili_format.ilf_asize = vecp->i_len;
+ vecp++;
+ nvecs++;
+ }
+ break;
+
+ case XFS_DINODE_FMT_BTREE:
+ ASSERT(!(iip->ili_format.ilf_fields &
+ (XFS_ILOG_ADATA | XFS_ILOG_AEXT)));
+ if (iip->ili_format.ilf_fields & XFS_ILOG_ABROOT) {
+ ASSERT(ip->i_afp->if_broot_bytes > 0);
+ ASSERT(ip->i_afp->if_broot != NULL);
+ vecp->i_addr = (xfs_caddr_t)ip->i_afp->if_broot;
+ vecp->i_len = ip->i_afp->if_broot_bytes;
+ vecp++;
+ nvecs++;
+ iip->ili_format.ilf_asize = ip->i_afp->if_broot_bytes;
+ }
+ break;
+
+ case XFS_DINODE_FMT_LOCAL:
+ ASSERT(!(iip->ili_format.ilf_fields &
+ (XFS_ILOG_ABROOT | XFS_ILOG_AEXT)));
+ if (iip->ili_format.ilf_fields & XFS_ILOG_ADATA) {
+ ASSERT(ip->i_afp->if_bytes > 0);
+ ASSERT(ip->i_afp->if_u1.if_data != NULL);
+
+ vecp->i_addr = (xfs_caddr_t)ip->i_afp->if_u1.if_data;
+ /*
+ * 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));
+ vecp->i_len = (int)data_bytes;
+ vecp++;
+ nvecs++;
+ iip->ili_format.ilf_asize = (unsigned)data_bytes;
+ }
+ break;
+
+ default:
+ ASSERT(0);
+ break;
+ }
+
+ ASSERT(nvecs == iip->ili_item.li_desc->lid_size);
+ iip->ili_format.ilf_size = nvecs;
+}
+
+
+/*
+ * This is called to pin the inode associated with the inode log
+ * item in memory so it cannot be written out. Do this by calling
+ * xfs_ipin() to bump the pin count in the inode while holding the
+ * inode pin lock.
+ */
+STATIC void
+xfs_inode_item_pin(
+ xfs_inode_log_item_t *iip)
+{
+ ASSERT(ismrlocked(&(iip->ili_inode->i_lock), MR_UPDATE));
+ xfs_ipin(iip->ili_inode);
+}
+
+
+/*
+ * 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().
+ * Just call xfs_iunpin() on the inode to do this.
+ */
+/* ARGSUSED */
+STATIC void
+xfs_inode_item_unpin(
+ xfs_inode_log_item_t *iip,
+ int stale)
+{
+ xfs_iunpin(iip->ili_inode);
+}
+
+/* ARGSUSED */
+STATIC void
+xfs_inode_item_unpin_remove(
+ xfs_inode_log_item_t *iip,
+ xfs_trans_t *tp)
+{
+ xfs_iunpin(iip->ili_inode);
+}
+
+/*
+ * This is called to attempt to lock the inode associated with this
+ * inode log item, in preparation for the push routine which does the actual
+ * iflush. Don't sleep on the inode lock or the flush lock.
+ *
+ * If the flush lock is already held, indicating that the inode has
+ * been or is in the process of being flushed, then (ideally) we'd like to
+ * see if the inode's buffer is still incore, and if so give it a nudge.
+ * We delay doing so until the pushbuf routine, though, to avoid holding
+ * the AIL lock across a call to the blackhole which is the buffercache.
+ * Also we don't want to sleep in any device strategy routines, which can happen
+ * if we do the subsequent bawrite in here.
+ */
+STATIC uint
+xfs_inode_item_trylock(
+ xfs_inode_log_item_t *iip)
+{
+ register xfs_inode_t *ip;
+
+ ip = iip->ili_inode;
+
+ if (xfs_ipincount(ip) > 0) {
+ return XFS_ITEM_PINNED;
+ }
+
+ if (!xfs_ilock_nowait(ip, XFS_ILOCK_SHARED)) {
+ return XFS_ITEM_LOCKED;
+ }
+
+ if (!xfs_iflock_nowait(ip)) {
+ /*
+ * If someone else isn't already trying to push the inode
+ * buffer, we get to do it.
+ */
+ if (iip->ili_pushbuf_flag == 0) {
+ iip->ili_pushbuf_flag = 1;
+#ifdef DEBUG
+ iip->ili_push_owner = get_thread_id();
+#endif
+ /*
+ * Inode is left locked in shared mode.
+ * Pushbuf routine gets to unlock it.
+ */
+ return XFS_ITEM_PUSHBUF;
+ } else {
+ /*
+ * We hold the AIL_LOCK, so we must specify the
+ * NONOTIFY flag so that we won't double trip.
+ */
+ xfs_iunlock(ip, XFS_ILOCK_SHARED|XFS_IUNLOCK_NONOTIFY);
+ return XFS_ITEM_FLUSHING;
+ }
+ /* NOTREACHED */
+ }
+
+ /* Stale items should force out the iclog */
+ if (ip->i_flags & XFS_ISTALE) {
+ xfs_ifunlock(ip);
+ xfs_iunlock(ip, XFS_ILOCK_SHARED|XFS_IUNLOCK_NONOTIFY);
+ return XFS_ITEM_PINNED;
+ }
+
+#ifdef DEBUG
+ if (!XFS_FORCED_SHUTDOWN(ip->i_mount)) {
+ ASSERT(iip->ili_format.ilf_fields != 0);
+ ASSERT(iip->ili_logged == 0);
+ ASSERT(iip->ili_item.li_flags & XFS_LI_IN_AIL);
+ }
+#endif
+ return XFS_ITEM_SUCCESS;
+}
+
+/*
+ * 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(
+ xfs_inode_log_item_t *iip)
+{
+ uint hold;
+ uint iolocked;
+ uint lock_flags;
+ xfs_inode_t *ip;
+
+ ASSERT(iip != NULL);
+ ASSERT(iip->ili_inode->i_itemp != NULL);
+ ASSERT(ismrlocked(&(iip->ili_inode->i_lock), MR_UPDATE));
+ ASSERT((!(iip->ili_inode->i_itemp->ili_flags &
+ XFS_ILI_IOLOCKED_EXCL)) ||
+ ismrlocked(&(iip->ili_inode->i_iolock), MR_UPDATE));
+ ASSERT((!(iip->ili_inode->i_itemp->ili_flags &
+ XFS_ILI_IOLOCKED_SHARED)) ||
+ ismrlocked(&(iip->ili_inode->i_iolock), MR_ACCESS));
+ /*
+ * Clear the transaction pointer in the inode.
+ */
+ ip = iip->ili_inode;
+ ip->i_transp = NULL;
+
+ /*
+ * If the inode needed a separate buffer with which to log
+ * its extents, then free it now.
+ */
+ if (iip->ili_extents_buf != NULL) {
+ ASSERT(ip->i_d.di_format == XFS_DINODE_FMT_EXTENTS);
+ ASSERT(ip->i_d.di_nextents > 0);
+ ASSERT(iip->ili_format.ilf_fields & XFS_ILOG_DEXT);
+ ASSERT(ip->i_df.if_bytes > 0);
+ kmem_free(iip->ili_extents_buf, ip->i_df.if_bytes);
+ iip->ili_extents_buf = NULL;
+ }
+ if (iip->ili_aextents_buf != NULL) {
+ ASSERT(ip->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS);
+ ASSERT(ip->i_d.di_anextents > 0);
+ ASSERT(iip->ili_format.ilf_fields & XFS_ILOG_AEXT);
+ ASSERT(ip->i_afp->if_bytes > 0);
+ kmem_free(iip->ili_aextents_buf, ip->i_afp->if_bytes);
+ iip->ili_aextents_buf = NULL;
+ }
+
+ /*
+ * Figure out if we should unlock the inode or not.
+ */
+ hold = iip->ili_flags & XFS_ILI_HOLD;
+
+ /*
+ * Before clearing out the flags, remember whether we
+ * are holding the inode's IO lock.
+ */
+ iolocked = iip->ili_flags & XFS_ILI_IOLOCKED_ANY;
+
+ /*
+ * Clear out the fields of the inode log item particular
+ * to the current transaction.
+ */
+ iip->ili_ilock_recur = 0;
+ iip->ili_iolock_recur = 0;
+ iip->ili_flags = 0;
+
+ /*
+ * Unlock the inode if XFS_ILI_HOLD was not set.
+ */
+ if (!hold) {
+ lock_flags = XFS_ILOCK_EXCL;
+ if (iolocked & XFS_ILI_IOLOCKED_EXCL) {
+ lock_flags |= XFS_IOLOCK_EXCL;
+ } else if (iolocked & XFS_ILI_IOLOCKED_SHARED) {
+ lock_flags |= XFS_IOLOCK_SHARED;
+ }
+ xfs_iput(iip->ili_inode, 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.
+ */
+/*ARGSUSED*/
+STATIC xfs_lsn_t
+xfs_inode_item_committed(
+ xfs_inode_log_item_t *iip,
+ xfs_lsn_t lsn)
+{
+ return (lsn);
+}
+
+/*
+ * The transaction with the inode locked has aborted. The inode
+ * must not be dirty within the transaction (unless we're forcibly
+ * shutting down). We simply unlock just as if the transaction
+ * had been cancelled.
+ */
+STATIC void
+xfs_inode_item_abort(
+ xfs_inode_log_item_t *iip)
+{
+ xfs_inode_item_unlock(iip);
+ return;
+}
+
+
+/*
+ * This gets called by xfs_trans_push_ail(), when IOP_TRYLOCK
+ * failed to get the inode flush lock but did get the inode locked SHARED.
+ * Here we're trying to see if the inode buffer is incore, and if so whether it's
+ * marked delayed write. If that's the case, we'll initiate a bawrite on that
+ * buffer to expedite the process.
+ *
+ * We aren't holding the AIL_LOCK (or the flush lock) when this gets called,
+ * so it is inherently race-y.
+ */
+STATIC void
+xfs_inode_item_pushbuf(
+ xfs_inode_log_item_t *iip)
+{
+ xfs_inode_t *ip;
+ xfs_mount_t *mp;
+ xfs_buf_t *bp;
+ uint dopush;
+
+ ip = iip->ili_inode;
+
+ ASSERT(ismrlocked(&(ip->i_lock), MR_ACCESS));
+
+ /*
+ * The ili_pushbuf_flag keeps others from
+ * trying to duplicate our effort.
+ */
+ ASSERT(iip->ili_pushbuf_flag != 0);
+ ASSERT(iip->ili_push_owner == get_thread_id());
+
+ /*
+ * If flushlock isn't locked anymore, chances are that the
+ * inode flush completed and the inode was taken off the AIL.
+ * So, just get out.
+ */
+ if ((valusema(&(ip->i_flock)) > 0) ||
+ ((iip->ili_item.li_flags & XFS_LI_IN_AIL) == 0)) {
+ iip->ili_pushbuf_flag = 0;
+ xfs_iunlock(ip, XFS_ILOCK_SHARED);
+ return;
+ }
+
+ mp = ip->i_mount;
+ bp = xfs_incore(mp->m_ddev_targp, iip->ili_format.ilf_blkno,
+ iip->ili_format.ilf_len, XFS_INCORE_TRYLOCK);
+
+ if (bp != NULL) {
+ if (XFS_BUF_ISDELAYWRITE(bp)) {
+ /*
+ * We were racing with iflush because we don't hold
+ * the AIL_LOCK or the flush lock. However, at this point,
+ * we have the buffer, and we know that it's dirty.
+ * So, it's possible that iflush raced with us, and
+ * this item is already taken off the AIL.
+ * If not, we can flush it async.
+ */
+ dopush = ((iip->ili_item.li_flags & XFS_LI_IN_AIL) &&
+ (valusema(&(ip->i_flock)) <= 0));
+ iip->ili_pushbuf_flag = 0;
+ xfs_iunlock(ip, XFS_ILOCK_SHARED);
+ xfs_buftrace("INODE ITEM PUSH", bp);
+ if (XFS_BUF_ISPINNED(bp)) {
+ xfs_log_force(mp, (xfs_lsn_t)0,
+ XFS_LOG_FORCE);
+ }
+ if (dopush) {
+ xfs_bawrite(mp, bp);
+ } else {
+ xfs_buf_relse(bp);
+ }
+ } else {
+ iip->ili_pushbuf_flag = 0;
+ xfs_iunlock(ip, XFS_ILOCK_SHARED);
+ xfs_buf_relse(bp);
+ }
+ return;
+ }
+ /*
+ * We have to be careful about resetting pushbuf flag too early (above).
+ * Even though in theory we can do it as soon as we have the buflock,
+ * we don't want others to be doing work needlessly. They'll come to
+ * this function thinking that pushing the buffer is their
+ * responsibility only to find that the buffer is still locked by
+ * another doing the same thing
+ */
+ iip->ili_pushbuf_flag = 0;
+ xfs_iunlock(ip, XFS_ILOCK_SHARED);
+ return;
+}
+
+
+/*
+ * This is called to asynchronously write the inode associated with this
+ * inode log item out to disk. The inode will already have been locked by
+ * a successful call to xfs_inode_item_trylock().
+ */
+STATIC void
+xfs_inode_item_push(
+ xfs_inode_log_item_t *iip)
+{
+ xfs_inode_t *ip;
+
+ ip = iip->ili_inode;
+
+ ASSERT(ismrlocked(&(ip->i_lock), MR_ACCESS));
+ ASSERT(valusema(&(ip->i_flock)) <= 0);
+ /*
+ * Since we were able to lock the inode's flush lock and
+ * we found it on the AIL, the inode must be dirty. This
+ * is because the inode is removed from the AIL while still
+ * holding the flush lock in xfs_iflush_done(). Thus, if
+ * we found it in the AIL and were able to obtain the flush
+ * lock without sleeping, then there must not have been
+ * anyone in the process of flushing the inode.
+ */
+ ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) ||
+ iip->ili_format.ilf_fields != 0);
+
+ /*
+ * Write out the inode. The completion routine ('iflush_done') will
+ * pull it from the AIL, mark it clean, unlock the flush lock.
+ */
+ (void) xfs_iflush(ip, XFS_IFLUSH_ASYNC);
+ xfs_iunlock(ip, XFS_ILOCK_SHARED);
+
+ return;
+}
+
+/*
+ * XXX rcc - this one really has to do something. Probably needs
+ * to stamp in a new field in the incore inode.
+ */
+/* ARGSUSED */
+STATIC void
+xfs_inode_item_committing(
+ xfs_inode_log_item_t *iip,
+ xfs_lsn_t lsn)
+{
+ iip->ili_last_lsn = lsn;
+ return;
+}
+
+/*
+ * This is the ops vector shared by all buf log items.
+ */
+struct xfs_item_ops xfs_inode_item_ops = {
+ .iop_size = (uint(*)(xfs_log_item_t*))xfs_inode_item_size,
+ .iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
+ xfs_inode_item_format,
+ .iop_pin = (void(*)(xfs_log_item_t*))xfs_inode_item_pin,
+ .iop_unpin = (void(*)(xfs_log_item_t*, int))xfs_inode_item_unpin,
+ .iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t*))
+ xfs_inode_item_unpin_remove,
+ .iop_trylock = (uint(*)(xfs_log_item_t*))xfs_inode_item_trylock,
+ .iop_unlock = (void(*)(xfs_log_item_t*))xfs_inode_item_unlock,
+ .iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))
+ xfs_inode_item_committed,
+ .iop_push = (void(*)(xfs_log_item_t*))xfs_inode_item_push,
+ .iop_abort = (void(*)(xfs_log_item_t*))xfs_inode_item_abort,
+ .iop_pushbuf = (void(*)(xfs_log_item_t*))xfs_inode_item_pushbuf,
+ .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t))
+ xfs_inode_item_committing
+};
+
+
+/*
+ * Initialize the inode log item for a newly allocated (in-core) inode.
+ */
+void
+xfs_inode_item_init(
+ xfs_inode_t *ip,
+ xfs_mount_t *mp)
+{
+ xfs_inode_log_item_t *iip;
+
+ ASSERT(ip->i_itemp == NULL);
+ iip = ip->i_itemp = kmem_zone_zalloc(xfs_ili_zone, KM_SLEEP);
+
+ iip->ili_item.li_type = XFS_LI_INODE;
+ iip->ili_item.li_ops = &xfs_inode_item_ops;
+ iip->ili_item.li_mountp = mp;
+ iip->ili_inode = ip;
+
+ /*
+ We have zeroed memory. No need ...
+ iip->ili_extents_buf = NULL;
+ iip->ili_pushbuf_flag = 0;
+ */
+
+ iip->ili_format.ilf_type = XFS_LI_INODE;
+ iip->ili_format.ilf_ino = ip->i_ino;
+ iip->ili_format.ilf_blkno = ip->i_blkno;
+ iip->ili_format.ilf_len = ip->i_len;
+ iip->ili_format.ilf_boffset = ip->i_boffset;
+}
+
+/*
+ * Free the inode log item and any memory hanging off of it.
+ */
+void
+xfs_inode_item_destroy(
+ xfs_inode_t *ip)
+{
+#ifdef XFS_TRANS_DEBUG
+ if (ip->i_itemp->ili_root_size != 0) {
+ kmem_free(ip->i_itemp->ili_orig_root,
+ ip->i_itemp->ili_root_size);
+ }
+#endif
+ 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.
+ */
+/*ARGSUSED*/
+void
+xfs_iflush_done(
+ xfs_buf_t *bp,
+ xfs_inode_log_item_t *iip)
+{
+ xfs_inode_t *ip;
+ SPLDECL(s);
+
+ ip = iip->ili_inode;
+
+ /*
+ * 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 (iip->ili_logged &&
+ (iip->ili_item.li_lsn == iip->ili_flush_lsn)) {
+ AIL_LOCK(ip->i_mount, s);
+ if (iip->ili_item.li_lsn == iip->ili_flush_lsn) {
+ /*
+ * xfs_trans_delete_ail() drops the AIL lock.
+ */
+ xfs_trans_delete_ail(ip->i_mount,
+ (xfs_log_item_t*)iip, s);
+ } else {
+ AIL_UNLOCK(ip->i_mount, s);
+ }
+ }
+
+ 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;
+
+ /*
+ * Release the inode's flush lock since we're done with it.
+ */
+ xfs_ifunlock(ip);
+
+ return;
+}
+
+/*
+ * 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)
+{
+ xfs_inode_log_item_t *iip;
+ xfs_mount_t *mp;
+ SPLDECL(s);
+
+ iip = ip->i_itemp;
+ mp = ip->i_mount;
+ if (iip) {
+ if (iip->ili_item.li_flags & XFS_LI_IN_AIL) {
+ AIL_LOCK(mp, s);
+ if (iip->ili_item.li_flags & XFS_LI_IN_AIL) {
+ /*
+ * xfs_trans_delete_ail() drops the AIL lock.
+ */
+ xfs_trans_delete_ail(mp, (xfs_log_item_t *)iip,
+ s);
+ } else
+ AIL_UNLOCK(mp, s);
+ }
+ 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_format.ilf_fields = 0;
+ }
+ /*
+ * Release the inode's flush lock since we're done with it.
+ */
+ xfs_ifunlock(ip);
+}
+
+void
+xfs_istale_done(
+ xfs_buf_t *bp,
+ xfs_inode_log_item_t *iip)
+{
+ xfs_iflush_abort(iip->ili_inode);
+}
