zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/fs/xfs/xfs_attr.c b/ap/os/linux/linux-3.4.x/fs/xfs/xfs_attr.c
new file mode 100644
index 0000000..65d61b9
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/fs/xfs/xfs_attr.c
@@ -0,0 +1,2231 @@
+/*
+ * Copyright (c) 2000-2005 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_types.h"
+#include "xfs_bit.h"
+#include "xfs_log.h"
+#include "xfs_inum.h"
+#include "xfs_trans.h"
+#include "xfs_sb.h"
+#include "xfs_ag.h"
+#include "xfs_mount.h"
+#include "xfs_da_btree.h"
+#include "xfs_bmap_btree.h"
+#include "xfs_attr_sf.h"
+#include "xfs_dinode.h"
+#include "xfs_inode.h"
+#include "xfs_alloc.h"
+#include "xfs_inode_item.h"
+#include "xfs_bmap.h"
+#include "xfs_attr.h"
+#include "xfs_attr_leaf.h"
+#include "xfs_error.h"
+#include "xfs_quota.h"
+#include "xfs_trans_space.h"
+#include "xfs_rw.h"
+#include "xfs_vnodeops.h"
+#include "xfs_trace.h"
+
+/*
+ * xfs_attr.c
+ *
+ * Provide the external interfaces to manage attribute lists.
+ */
+
+/*========================================================================
+ * Function prototypes for the kernel.
+ *========================================================================*/
+
+/*
+ * Internal routines when attribute list fits inside the inode.
+ */
+STATIC int xfs_attr_shortform_addname(xfs_da_args_t *args);
+
+/*
+ * Internal routines when attribute list is one block.
+ */
+STATIC int xfs_attr_leaf_get(xfs_da_args_t *args);
+STATIC int xfs_attr_leaf_addname(xfs_da_args_t *args);
+STATIC int xfs_attr_leaf_removename(xfs_da_args_t *args);
+STATIC int xfs_attr_leaf_list(xfs_attr_list_context_t *context);
+
+/*
+ * Internal routines when attribute list is more than one block.
+ */
+STATIC int xfs_attr_node_get(xfs_da_args_t *args);
+STATIC int xfs_attr_node_addname(xfs_da_args_t *args);
+STATIC int xfs_attr_node_removename(xfs_da_args_t *args);
+STATIC int xfs_attr_node_list(xfs_attr_list_context_t *context);
+STATIC int xfs_attr_fillstate(xfs_da_state_t *state);
+STATIC int xfs_attr_refillstate(xfs_da_state_t *state);
+
+/*
+ * Routines to manipulate out-of-line attribute values.
+ */
+STATIC int xfs_attr_rmtval_set(xfs_da_args_t *args);
+STATIC int xfs_attr_rmtval_remove(xfs_da_args_t *args);
+
+#define ATTR_RMTVALUE_MAPSIZE 1 /* # of map entries at once */
+
+STATIC int
+xfs_attr_name_to_xname(
+ struct xfs_name *xname,
+ const unsigned char *aname)
+{
+ if (!aname)
+ return EINVAL;
+ xname->name = aname;
+ xname->len = strlen((char *)aname);
+ if (xname->len >= MAXNAMELEN)
+ return EFAULT; /* match IRIX behaviour */
+
+ return 0;
+}
+
+STATIC int
+xfs_inode_hasattr(
+ struct xfs_inode *ip)
+{
+ if (!XFS_IFORK_Q(ip) ||
+ (ip->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS &&
+ ip->i_d.di_anextents == 0))
+ return 0;
+ return 1;
+}
+
+/*========================================================================
+ * Overall external interface routines.
+ *========================================================================*/
+
+STATIC int
+xfs_attr_get_int(
+ struct xfs_inode *ip,
+ struct xfs_name *name,
+ unsigned char *value,
+ int *valuelenp,
+ int flags)
+{
+ xfs_da_args_t args;
+ int error;
+
+ if (!xfs_inode_hasattr(ip))
+ return ENOATTR;
+
+ /*
+ * Fill in the arg structure for this request.
+ */
+ memset((char *)&args, 0, sizeof(args));
+ args.name = name->name;
+ args.namelen = name->len;
+ args.value = value;
+ args.valuelen = *valuelenp;
+ args.flags = flags;
+ args.hashval = xfs_da_hashname(args.name, args.namelen);
+ args.dp = ip;
+ args.whichfork = XFS_ATTR_FORK;
+
+ /*
+ * Decide on what work routines to call based on the inode size.
+ */
+ if (ip->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) {
+ error = xfs_attr_shortform_getvalue(&args);
+ } else if (xfs_bmap_one_block(ip, XFS_ATTR_FORK)) {
+ error = xfs_attr_leaf_get(&args);
+ } else {
+ error = xfs_attr_node_get(&args);
+ }
+
+ /*
+ * Return the number of bytes in the value to the caller.
+ */
+ *valuelenp = args.valuelen;
+
+ if (error == EEXIST)
+ error = 0;
+ return(error);
+}
+
+int
+xfs_attr_get(
+ xfs_inode_t *ip,
+ const unsigned char *name,
+ unsigned char *value,
+ int *valuelenp,
+ int flags)
+{
+ int error;
+ struct xfs_name xname;
+
+ XFS_STATS_INC(xs_attr_get);
+
+ if (XFS_FORCED_SHUTDOWN(ip->i_mount))
+ return(EIO);
+
+ error = xfs_attr_name_to_xname(&xname, name);
+ if (error)
+ return error;
+
+ xfs_ilock(ip, XFS_ILOCK_SHARED);
+ error = xfs_attr_get_int(ip, &xname, value, valuelenp, flags);
+ xfs_iunlock(ip, XFS_ILOCK_SHARED);
+ return(error);
+}
+
+/*
+ * Calculate how many blocks we need for the new attribute,
+ */
+STATIC int
+xfs_attr_calc_size(
+ struct xfs_inode *ip,
+ int namelen,
+ int valuelen,
+ int *local)
+{
+ struct xfs_mount *mp = ip->i_mount;
+ int size;
+ int nblks;
+
+ /*
+ * Determine space new attribute will use, and if it would be
+ * "local" or "remote" (note: local != inline).
+ */
+ size = xfs_attr_leaf_newentsize(namelen, valuelen,
+ mp->m_sb.sb_blocksize, local);
+
+ nblks = XFS_DAENTER_SPACE_RES(mp, XFS_ATTR_FORK);
+ if (*local) {
+ if (size > (mp->m_sb.sb_blocksize >> 1)) {
+ /* Double split possible */
+ nblks *= 2;
+ }
+ } else {
+ /*
+ * Out of line attribute, cannot double split, but
+ * make room for the attribute value itself.
+ */
+ uint dblocks = XFS_B_TO_FSB(mp, valuelen);
+ nblks += dblocks;
+ nblks += XFS_NEXTENTADD_SPACE_RES(mp, dblocks, XFS_ATTR_FORK);
+ }
+
+ return nblks;
+}
+
+STATIC int
+xfs_attr_set_int(
+ struct xfs_inode *dp,
+ struct xfs_name *name,
+ unsigned char *value,
+ int valuelen,
+ int flags)
+{
+ xfs_da_args_t args;
+ xfs_fsblock_t firstblock;
+ xfs_bmap_free_t flist;
+ int error, err2, committed;
+ xfs_mount_t *mp = dp->i_mount;
+ int rsvd = (flags & ATTR_ROOT) != 0;
+ int local;
+
+ /*
+ * Attach the dquots to the inode.
+ */
+ error = xfs_qm_dqattach(dp, 0);
+ if (error)
+ return error;
+
+ /*
+ * If the inode doesn't have an attribute fork, add one.
+ * (inode must not be locked when we call this routine)
+ */
+ if (XFS_IFORK_Q(dp) == 0) {
+ int sf_size = sizeof(xfs_attr_sf_hdr_t) +
+ XFS_ATTR_SF_ENTSIZE_BYNAME(name->len, valuelen);
+
+ if ((error = xfs_bmap_add_attrfork(dp, sf_size, rsvd)))
+ return(error);
+ }
+
+ /*
+ * Fill in the arg structure for this request.
+ */
+ memset((char *)&args, 0, sizeof(args));
+ args.name = name->name;
+ args.namelen = name->len;
+ args.value = value;
+ args.valuelen = valuelen;
+ args.flags = flags;
+ args.hashval = xfs_da_hashname(args.name, args.namelen);
+ args.dp = dp;
+ args.firstblock = &firstblock;
+ args.flist = &flist;
+ args.whichfork = XFS_ATTR_FORK;
+ args.op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT;
+
+ /* Size is now blocks for attribute data */
+ args.total = xfs_attr_calc_size(dp, name->len, valuelen, &local);
+
+ /*
+ * Start our first transaction of the day.
+ *
+ * All future transactions during this code must be "chained" off
+ * this one via the trans_dup() call. All transactions will contain
+ * the inode, and the inode will always be marked with trans_ihold().
+ * Since the inode will be locked in all transactions, we must log
+ * the inode in every transaction to let it float upward through
+ * the log.
+ */
+ args.trans = xfs_trans_alloc(mp, XFS_TRANS_ATTR_SET);
+
+ /*
+ * Root fork attributes can use reserved data blocks for this
+ * operation if necessary
+ */
+
+ if (rsvd)
+ args.trans->t_flags |= XFS_TRANS_RESERVE;
+
+ if ((error = xfs_trans_reserve(args.trans, args.total,
+ XFS_ATTRSET_LOG_RES(mp, args.total), 0,
+ XFS_TRANS_PERM_LOG_RES, XFS_ATTRSET_LOG_COUNT))) {
+ xfs_trans_cancel(args.trans, 0);
+ return(error);
+ }
+ xfs_ilock(dp, XFS_ILOCK_EXCL);
+
+ error = xfs_trans_reserve_quota_nblks(args.trans, dp, args.total, 0,
+ rsvd ? XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_FORCE_RES :
+ XFS_QMOPT_RES_REGBLKS);
+ if (error) {
+ xfs_iunlock(dp, XFS_ILOCK_EXCL);
+ xfs_trans_cancel(args.trans, XFS_TRANS_RELEASE_LOG_RES);
+ return (error);
+ }
+
+ xfs_trans_ijoin(args.trans, dp, 0);
+
+ /*
+ * If the attribute list is non-existent or a shortform list,
+ * upgrade it to a single-leaf-block attribute list.
+ */
+ if ((dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) ||
+ ((dp->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS) &&
+ (dp->i_d.di_anextents == 0))) {
+
+ /*
+ * Build initial attribute list (if required).
+ */
+ if (dp->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS)
+ xfs_attr_shortform_create(&args);
+
+ /*
+ * Try to add the attr to the attribute list in
+ * the inode.
+ */
+ error = xfs_attr_shortform_addname(&args);
+ if (error != ENOSPC) {
+ /*
+ * Commit the shortform mods, and we're done.
+ * NOTE: this is also the error path (EEXIST, etc).
+ */
+ ASSERT(args.trans != NULL);
+
+ /*
+ * If this is a synchronous mount, make sure that
+ * the transaction goes to disk before returning
+ * to the user.
+ */
+ if (mp->m_flags & XFS_MOUNT_WSYNC) {
+ xfs_trans_set_sync(args.trans);
+ }
+
+ if (!error && (flags & ATTR_KERNOTIME) == 0) {
+ xfs_trans_ichgtime(args.trans, dp,
+ XFS_ICHGTIME_CHG);
+ }
+ err2 = xfs_trans_commit(args.trans,
+ XFS_TRANS_RELEASE_LOG_RES);
+ xfs_iunlock(dp, XFS_ILOCK_EXCL);
+
+ return(error == 0 ? err2 : error);
+ }
+
+ /*
+ * It won't fit in the shortform, transform to a leaf block.
+ * GROT: another possible req'mt for a double-split btree op.
+ */
+ xfs_bmap_init(args.flist, args.firstblock);
+ error = xfs_attr_shortform_to_leaf(&args);
+ if (!error) {
+ error = xfs_bmap_finish(&args.trans, args.flist,
+ &committed);
+ }
+ if (error) {
+ ASSERT(committed);
+ args.trans = NULL;
+ xfs_bmap_cancel(&flist);
+ goto out;
+ }
+
+ /*
+ * bmap_finish() may have committed the last trans and started
+ * a new one. We need the inode to be in all transactions.
+ */
+ if (committed)
+ xfs_trans_ijoin(args.trans, dp, 0);
+
+ /*
+ * Commit the leaf transformation. We'll need another (linked)
+ * transaction to add the new attribute to the leaf.
+ */
+
+ error = xfs_trans_roll(&args.trans, dp);
+ if (error)
+ goto out;
+
+ }
+
+ if (xfs_bmap_one_block(dp, XFS_ATTR_FORK)) {
+ error = xfs_attr_leaf_addname(&args);
+ } else {
+ error = xfs_attr_node_addname(&args);
+ }
+ if (error) {
+ goto out;
+ }
+
+ /*
+ * If this is a synchronous mount, make sure that the
+ * transaction goes to disk before returning to the user.
+ */
+ if (mp->m_flags & XFS_MOUNT_WSYNC) {
+ xfs_trans_set_sync(args.trans);
+ }
+
+ if ((flags & ATTR_KERNOTIME) == 0)
+ xfs_trans_ichgtime(args.trans, dp, XFS_ICHGTIME_CHG);
+
+ /*
+ * Commit the last in the sequence of transactions.
+ */
+ xfs_trans_log_inode(args.trans, dp, XFS_ILOG_CORE);
+ error = xfs_trans_commit(args.trans, XFS_TRANS_RELEASE_LOG_RES);
+ xfs_iunlock(dp, XFS_ILOCK_EXCL);
+
+ return(error);
+
+out:
+ if (args.trans)
+ xfs_trans_cancel(args.trans,
+ XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT);
+ xfs_iunlock(dp, XFS_ILOCK_EXCL);
+ return(error);
+}
+
+int
+xfs_attr_set(
+ xfs_inode_t *dp,
+ const unsigned char *name,
+ unsigned char *value,
+ int valuelen,
+ int flags)
+{
+ int error;
+ struct xfs_name xname;
+
+ XFS_STATS_INC(xs_attr_set);
+
+ if (XFS_FORCED_SHUTDOWN(dp->i_mount))
+ return (EIO);
+
+ error = xfs_attr_name_to_xname(&xname, name);
+ if (error)
+ return error;
+
+ return xfs_attr_set_int(dp, &xname, value, valuelen, flags);
+}
+
+/*
+ * Generic handler routine to remove a name from an attribute list.
+ * Transitions attribute list from Btree to shortform as necessary.
+ */
+STATIC int
+xfs_attr_remove_int(xfs_inode_t *dp, struct xfs_name *name, int flags)
+{
+ xfs_da_args_t args;
+ xfs_fsblock_t firstblock;
+ xfs_bmap_free_t flist;
+ int error;
+ xfs_mount_t *mp = dp->i_mount;
+
+ /*
+ * Fill in the arg structure for this request.
+ */
+ memset((char *)&args, 0, sizeof(args));
+ args.name = name->name;
+ args.namelen = name->len;
+ args.flags = flags;
+ args.hashval = xfs_da_hashname(args.name, args.namelen);
+ args.dp = dp;
+ args.firstblock = &firstblock;
+ args.flist = &flist;
+ args.total = 0;
+ args.whichfork = XFS_ATTR_FORK;
+
+ /*
+ * we have no control over the attribute names that userspace passes us
+ * to remove, so we have to allow the name lookup prior to attribute
+ * removal to fail.
+ */
+ args.op_flags = XFS_DA_OP_OKNOENT;
+
+ /*
+ * Attach the dquots to the inode.
+ */
+ error = xfs_qm_dqattach(dp, 0);
+ if (error)
+ return error;
+
+ /*
+ * Start our first transaction of the day.
+ *
+ * All future transactions during this code must be "chained" off
+ * this one via the trans_dup() call. All transactions will contain
+ * the inode, and the inode will always be marked with trans_ihold().
+ * Since the inode will be locked in all transactions, we must log
+ * the inode in every transaction to let it float upward through
+ * the log.
+ */
+ args.trans = xfs_trans_alloc(mp, XFS_TRANS_ATTR_RM);
+
+ /*
+ * Root fork attributes can use reserved data blocks for this
+ * operation if necessary
+ */
+
+ if (flags & ATTR_ROOT)
+ args.trans->t_flags |= XFS_TRANS_RESERVE;
+
+ if ((error = xfs_trans_reserve(args.trans,
+ XFS_ATTRRM_SPACE_RES(mp),
+ XFS_ATTRRM_LOG_RES(mp),
+ 0, XFS_TRANS_PERM_LOG_RES,
+ XFS_ATTRRM_LOG_COUNT))) {
+ xfs_trans_cancel(args.trans, 0);
+ return(error);
+ }
+
+ xfs_ilock(dp, XFS_ILOCK_EXCL);
+ /*
+ * No need to make quota reservations here. We expect to release some
+ * blocks not allocate in the common case.
+ */
+ xfs_trans_ijoin(args.trans, dp, 0);
+
+ /*
+ * Decide on what work routines to call based on the inode size.
+ */
+ if (!xfs_inode_hasattr(dp)) {
+ error = XFS_ERROR(ENOATTR);
+ goto out;
+ }
+ if (dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) {
+ ASSERT(dp->i_afp->if_flags & XFS_IFINLINE);
+ error = xfs_attr_shortform_remove(&args);
+ if (error) {
+ goto out;
+ }
+ } else if (xfs_bmap_one_block(dp, XFS_ATTR_FORK)) {
+ error = xfs_attr_leaf_removename(&args);
+ } else {
+ error = xfs_attr_node_removename(&args);
+ }
+ if (error) {
+ goto out;
+ }
+
+ /*
+ * If this is a synchronous mount, make sure that the
+ * transaction goes to disk before returning to the user.
+ */
+ if (mp->m_flags & XFS_MOUNT_WSYNC) {
+ xfs_trans_set_sync(args.trans);
+ }
+
+ if ((flags & ATTR_KERNOTIME) == 0)
+ xfs_trans_ichgtime(args.trans, dp, XFS_ICHGTIME_CHG);
+
+ /*
+ * Commit the last in the sequence of transactions.
+ */
+ xfs_trans_log_inode(args.trans, dp, XFS_ILOG_CORE);
+ error = xfs_trans_commit(args.trans, XFS_TRANS_RELEASE_LOG_RES);
+ xfs_iunlock(dp, XFS_ILOCK_EXCL);
+
+ return(error);
+
+out:
+ if (args.trans)
+ xfs_trans_cancel(args.trans,
+ XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT);
+ xfs_iunlock(dp, XFS_ILOCK_EXCL);
+ return(error);
+}
+
+int
+xfs_attr_remove(
+ xfs_inode_t *dp,
+ const unsigned char *name,
+ int flags)
+{
+ int error;
+ struct xfs_name xname;
+
+ XFS_STATS_INC(xs_attr_remove);
+
+ if (XFS_FORCED_SHUTDOWN(dp->i_mount))
+ return (EIO);
+
+ error = xfs_attr_name_to_xname(&xname, name);
+ if (error)
+ return error;
+
+ xfs_ilock(dp, XFS_ILOCK_SHARED);
+ if (!xfs_inode_hasattr(dp)) {
+ xfs_iunlock(dp, XFS_ILOCK_SHARED);
+ return XFS_ERROR(ENOATTR);
+ }
+ xfs_iunlock(dp, XFS_ILOCK_SHARED);
+
+ return xfs_attr_remove_int(dp, &xname, flags);
+}
+
+int
+xfs_attr_list_int(xfs_attr_list_context_t *context)
+{
+ int error;
+ xfs_inode_t *dp = context->dp;
+
+ XFS_STATS_INC(xs_attr_list);
+
+ if (XFS_FORCED_SHUTDOWN(dp->i_mount))
+ return EIO;
+
+ xfs_ilock(dp, XFS_ILOCK_SHARED);
+
+ /*
+ * Decide on what work routines to call based on the inode size.
+ */
+ if (!xfs_inode_hasattr(dp)) {
+ error = 0;
+ } else if (dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) {
+ error = xfs_attr_shortform_list(context);
+ } else if (xfs_bmap_one_block(dp, XFS_ATTR_FORK)) {
+ error = xfs_attr_leaf_list(context);
+ } else {
+ error = xfs_attr_node_list(context);
+ }
+
+ xfs_iunlock(dp, XFS_ILOCK_SHARED);
+
+ return error;
+}
+
+#define ATTR_ENTBASESIZE /* minimum bytes used by an attr */ \
+ (((struct attrlist_ent *) 0)->a_name - (char *) 0)
+#define ATTR_ENTSIZE(namelen) /* actual bytes used by an attr */ \
+ ((ATTR_ENTBASESIZE + (namelen) + 1 + sizeof(u_int32_t)-1) \
+ & ~(sizeof(u_int32_t)-1))
+
+/*
+ * Format an attribute and copy it out to the user's buffer.
+ * Take care to check values and protect against them changing later,
+ * we may be reading them directly out of a user buffer.
+ */
+/*ARGSUSED*/
+STATIC int
+xfs_attr_put_listent(
+ xfs_attr_list_context_t *context,
+ int flags,
+ unsigned char *name,
+ int namelen,
+ int valuelen,
+ unsigned char *value)
+{
+ struct attrlist *alist = (struct attrlist *)context->alist;
+ attrlist_ent_t *aep;
+ int arraytop;
+
+ ASSERT(!(context->flags & ATTR_KERNOVAL));
+ ASSERT(context->count >= 0);
+ ASSERT(context->count < (ATTR_MAX_VALUELEN/8));
+ ASSERT(context->firstu >= sizeof(*alist));
+ ASSERT(context->firstu <= context->bufsize);
+
+ /*
+ * Only list entries in the right namespace.
+ */
+ if (((context->flags & ATTR_SECURE) == 0) !=
+ ((flags & XFS_ATTR_SECURE) == 0))
+ return 0;
+ if (((context->flags & ATTR_ROOT) == 0) !=
+ ((flags & XFS_ATTR_ROOT) == 0))
+ return 0;
+
+ arraytop = sizeof(*alist) +
+ context->count * sizeof(alist->al_offset[0]);
+ context->firstu -= ATTR_ENTSIZE(namelen);
+ if (context->firstu < arraytop) {
+ trace_xfs_attr_list_full(context);
+ alist->al_more = 1;
+ context->seen_enough = 1;
+ return 1;
+ }
+
+ aep = (attrlist_ent_t *)&context->alist[context->firstu];
+ aep->a_valuelen = valuelen;
+ memcpy(aep->a_name, name, namelen);
+ aep->a_name[namelen] = 0;
+ alist->al_offset[context->count++] = context->firstu;
+ alist->al_count = context->count;
+ trace_xfs_attr_list_add(context);
+ return 0;
+}
+
+/*
+ * Generate a list of extended attribute names and optionally
+ * also value lengths. Positive return value follows the XFS
+ * convention of being an error, zero or negative return code
+ * is the length of the buffer returned (negated), indicating
+ * success.
+ */
+int
+xfs_attr_list(
+ xfs_inode_t *dp,
+ char *buffer,
+ int bufsize,
+ int flags,
+ attrlist_cursor_kern_t *cursor)
+{
+ xfs_attr_list_context_t context;
+ struct attrlist *alist;
+ int error;
+
+ /*
+ * Validate the cursor.
+ */
+ if (cursor->pad1 || cursor->pad2)
+ return(XFS_ERROR(EINVAL));
+ if ((cursor->initted == 0) &&
+ (cursor->hashval || cursor->blkno || cursor->offset))
+ return XFS_ERROR(EINVAL);
+
+ /*
+ * Check for a properly aligned buffer.
+ */
+ if (((long)buffer) & (sizeof(int)-1))
+ return XFS_ERROR(EFAULT);
+ if (flags & ATTR_KERNOVAL)
+ bufsize = 0;
+
+ /*
+ * Initialize the output buffer.
+ */
+ memset(&context, 0, sizeof(context));
+ context.dp = dp;
+ context.cursor = cursor;
+ context.resynch = 1;
+ context.flags = flags;
+ context.alist = buffer;
+ context.bufsize = (bufsize & ~(sizeof(int)-1)); /* align */
+ context.firstu = context.bufsize;
+ context.put_listent = xfs_attr_put_listent;
+
+ alist = (struct attrlist *)context.alist;
+ alist->al_count = 0;
+ alist->al_more = 0;
+ alist->al_offset[0] = context.bufsize;
+
+ error = xfs_attr_list_int(&context);
+ ASSERT(error >= 0);
+ return error;
+}
+
+int /* error */
+xfs_attr_inactive(xfs_inode_t *dp)
+{
+ xfs_trans_t *trans;
+ xfs_mount_t *mp;
+ int error;
+
+ mp = dp->i_mount;
+ ASSERT(! XFS_NOT_DQATTACHED(mp, dp));
+
+ xfs_ilock(dp, XFS_ILOCK_SHARED);
+ if (!xfs_inode_hasattr(dp) ||
+ dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) {
+ xfs_iunlock(dp, XFS_ILOCK_SHARED);
+ return 0;
+ }
+ xfs_iunlock(dp, XFS_ILOCK_SHARED);
+
+ /*
+ * Start our first transaction of the day.
+ *
+ * All future transactions during this code must be "chained" off
+ * this one via the trans_dup() call. All transactions will contain
+ * the inode, and the inode will always be marked with trans_ihold().
+ * Since the inode will be locked in all transactions, we must log
+ * the inode in every transaction to let it float upward through
+ * the log.
+ */
+ trans = xfs_trans_alloc(mp, XFS_TRANS_ATTRINVAL);
+ if ((error = xfs_trans_reserve(trans, 0, XFS_ATTRINVAL_LOG_RES(mp), 0,
+ XFS_TRANS_PERM_LOG_RES,
+ XFS_ATTRINVAL_LOG_COUNT))) {
+ xfs_trans_cancel(trans, 0);
+ return(error);
+ }
+ xfs_ilock(dp, XFS_ILOCK_EXCL);
+
+ /*
+ * No need to make quota reservations here. We expect to release some
+ * blocks, not allocate, in the common case.
+ */
+ xfs_trans_ijoin(trans, dp, 0);
+
+ /*
+ * Decide on what work routines to call based on the inode size.
+ */
+ if (!xfs_inode_hasattr(dp) ||
+ dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) {
+ error = 0;
+ goto out;
+ }
+ error = xfs_attr_root_inactive(&trans, dp);
+ if (error)
+ goto out;
+
+ error = xfs_itruncate_extents(&trans, dp, XFS_ATTR_FORK, 0);
+ if (error)
+ goto out;
+
+ error = xfs_trans_commit(trans, XFS_TRANS_RELEASE_LOG_RES);
+ xfs_iunlock(dp, XFS_ILOCK_EXCL);
+
+ return(error);
+
+out:
+ xfs_trans_cancel(trans, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT);
+ xfs_iunlock(dp, XFS_ILOCK_EXCL);
+ return(error);
+}
+
+
+
+/*========================================================================
+ * External routines when attribute list is inside the inode
+ *========================================================================*/
+
+/*
+ * Add a name to the shortform attribute list structure
+ * This is the external routine.
+ */
+STATIC int
+xfs_attr_shortform_addname(xfs_da_args_t *args)
+{
+ int newsize, forkoff, retval;
+
+ trace_xfs_attr_sf_addname(args);
+
+ retval = xfs_attr_shortform_lookup(args);
+ if ((args->flags & ATTR_REPLACE) && (retval == ENOATTR)) {
+ return(retval);
+ } else if (retval == EEXIST) {
+ if (args->flags & ATTR_CREATE)
+ return(retval);
+ retval = xfs_attr_shortform_remove(args);
+ ASSERT(retval == 0);
+ }
+
+ if (args->namelen >= XFS_ATTR_SF_ENTSIZE_MAX ||
+ args->valuelen >= XFS_ATTR_SF_ENTSIZE_MAX)
+ return(XFS_ERROR(ENOSPC));
+
+ newsize = XFS_ATTR_SF_TOTSIZE(args->dp);
+ newsize += XFS_ATTR_SF_ENTSIZE_BYNAME(args->namelen, args->valuelen);
+
+ forkoff = xfs_attr_shortform_bytesfit(args->dp, newsize);
+ if (!forkoff)
+ return(XFS_ERROR(ENOSPC));
+
+ xfs_attr_shortform_add(args, forkoff);
+ return(0);
+}
+
+
+/*========================================================================
+ * External routines when attribute list is one block
+ *========================================================================*/
+
+/*
+ * Add a name to the leaf attribute list structure
+ *
+ * This leaf block cannot have a "remote" value, we only call this routine
+ * if bmap_one_block() says there is only one block (ie: no remote blks).
+ */
+STATIC int
+xfs_attr_leaf_addname(xfs_da_args_t *args)
+{
+ xfs_inode_t *dp;
+ xfs_dabuf_t *bp;
+ int retval, error, committed, forkoff;
+
+ trace_xfs_attr_leaf_addname(args);
+
+ /*
+ * Read the (only) block in the attribute list in.
+ */
+ dp = args->dp;
+ args->blkno = 0;
+ error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp,
+ XFS_ATTR_FORK);
+ if (error)
+ return(error);
+ ASSERT(bp != NULL);
+
+ /*
+ * Look up the given attribute in the leaf block. Figure out if
+ * the given flags produce an error or call for an atomic rename.
+ */
+ retval = xfs_attr_leaf_lookup_int(bp, args);
+ if ((args->flags & ATTR_REPLACE) && (retval == ENOATTR)) {
+ xfs_da_brelse(args->trans, bp);
+ return(retval);
+ } else if (retval == EEXIST) {
+ if (args->flags & ATTR_CREATE) { /* pure create op */
+ xfs_da_brelse(args->trans, bp);
+ return(retval);
+ }
+
+ trace_xfs_attr_leaf_replace(args);
+
+ args->op_flags |= XFS_DA_OP_RENAME; /* an atomic rename */
+ args->blkno2 = args->blkno; /* set 2nd entry info*/
+ args->index2 = args->index;
+ args->rmtblkno2 = args->rmtblkno;
+ args->rmtblkcnt2 = args->rmtblkcnt;
+ }
+
+ /*
+ * Add the attribute to the leaf block, transitioning to a Btree
+ * if required.
+ */
+ retval = xfs_attr_leaf_add(bp, args);
+ xfs_da_buf_done(bp);
+ if (retval == ENOSPC) {
+ /*
+ * Promote the attribute list to the Btree format, then
+ * Commit that transaction so that the node_addname() call
+ * can manage its own transactions.
+ */
+ xfs_bmap_init(args->flist, args->firstblock);
+ error = xfs_attr_leaf_to_node(args);
+ if (!error) {
+ error = xfs_bmap_finish(&args->trans, args->flist,
+ &committed);
+ }
+ if (error) {
+ ASSERT(committed);
+ args->trans = NULL;
+ xfs_bmap_cancel(args->flist);
+ return(error);
+ }
+
+ /*
+ * bmap_finish() may have committed the last trans and started
+ * a new one. We need the inode to be in all transactions.
+ */
+ if (committed)
+ xfs_trans_ijoin(args->trans, dp, 0);
+
+ /*
+ * Commit the current trans (including the inode) and start
+ * a new one.
+ */
+ error = xfs_trans_roll(&args->trans, dp);
+ if (error)
+ return (error);
+
+ /*
+ * Fob the whole rest of the problem off on the Btree code.
+ */
+ error = xfs_attr_node_addname(args);
+ return(error);
+ }
+
+ /*
+ * Commit the transaction that added the attr name so that
+ * later routines can manage their own transactions.
+ */
+ error = xfs_trans_roll(&args->trans, dp);
+ if (error)
+ return (error);
+
+ /*
+ * If there was an out-of-line value, allocate the blocks we
+ * identified for its storage and copy the value. This is done
+ * after we create the attribute so that we don't overflow the
+ * maximum size of a transaction and/or hit a deadlock.
+ */
+ if (args->rmtblkno > 0) {
+ error = xfs_attr_rmtval_set(args);
+ if (error)
+ return(error);
+ }
+
+ /*
+ * If this is an atomic rename operation, we must "flip" the
+ * incomplete flags on the "new" and "old" attribute/value pairs
+ * so that one disappears and one appears atomically. Then we
+ * must remove the "old" attribute/value pair.
+ */
+ if (args->op_flags & XFS_DA_OP_RENAME) {
+ /*
+ * In a separate transaction, set the incomplete flag on the
+ * "old" attr and clear the incomplete flag on the "new" attr.
+ */
+ error = xfs_attr_leaf_flipflags(args);
+ if (error)
+ return(error);
+
+ /*
+ * Dismantle the "old" attribute/value pair by removing
+ * a "remote" value (if it exists).
+ */
+ args->index = args->index2;
+ args->blkno = args->blkno2;
+ args->rmtblkno = args->rmtblkno2;
+ args->rmtblkcnt = args->rmtblkcnt2;
+ if (args->rmtblkno) {
+ error = xfs_attr_rmtval_remove(args);
+ if (error)
+ return(error);
+ }
+
+ /*
+ * Read in the block containing the "old" attr, then
+ * remove the "old" attr from that block (neat, huh!)
+ */
+ error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1,
+ &bp, XFS_ATTR_FORK);
+ if (error)
+ return(error);
+ ASSERT(bp != NULL);
+ (void)xfs_attr_leaf_remove(bp, args);
+
+ /*
+ * If the result is small enough, shrink it all into the inode.
+ */
+ if ((forkoff = xfs_attr_shortform_allfit(bp, dp))) {
+ xfs_bmap_init(args->flist, args->firstblock);
+ error = xfs_attr_leaf_to_shortform(bp, args, forkoff);
+ /* bp is gone due to xfs_da_shrink_inode */
+ if (!error) {
+ error = xfs_bmap_finish(&args->trans,
+ args->flist,
+ &committed);
+ }
+ if (error) {
+ ASSERT(committed);
+ args->trans = NULL;
+ xfs_bmap_cancel(args->flist);
+ return(error);
+ }
+
+ /*
+ * bmap_finish() may have committed the last trans
+ * and started a new one. We need the inode to be
+ * in all transactions.
+ */
+ if (committed)
+ xfs_trans_ijoin(args->trans, dp, 0);
+ } else
+ xfs_da_buf_done(bp);
+
+ /*
+ * Commit the remove and start the next trans in series.
+ */
+ error = xfs_trans_roll(&args->trans, dp);
+
+ } else if (args->rmtblkno > 0) {
+ /*
+ * Added a "remote" value, just clear the incomplete flag.
+ */
+ error = xfs_attr_leaf_clearflag(args);
+ }
+ return(error);
+}
+
+/*
+ * Remove a name from the leaf attribute list structure
+ *
+ * This leaf block cannot have a "remote" value, we only call this routine
+ * if bmap_one_block() says there is only one block (ie: no remote blks).
+ */
+STATIC int
+xfs_attr_leaf_removename(xfs_da_args_t *args)
+{
+ xfs_inode_t *dp;
+ xfs_dabuf_t *bp;
+ int error, committed, forkoff;
+
+ trace_xfs_attr_leaf_removename(args);
+
+ /*
+ * Remove the attribute.
+ */
+ dp = args->dp;
+ args->blkno = 0;
+ error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp,
+ XFS_ATTR_FORK);
+ if (error) {
+ return(error);
+ }
+
+ ASSERT(bp != NULL);
+ error = xfs_attr_leaf_lookup_int(bp, args);
+ if (error == ENOATTR) {
+ xfs_da_brelse(args->trans, bp);
+ return(error);
+ }
+
+ (void)xfs_attr_leaf_remove(bp, args);
+
+ /*
+ * If the result is small enough, shrink it all into the inode.
+ */
+ if ((forkoff = xfs_attr_shortform_allfit(bp, dp))) {
+ xfs_bmap_init(args->flist, args->firstblock);
+ error = xfs_attr_leaf_to_shortform(bp, args, forkoff);
+ /* bp is gone due to xfs_da_shrink_inode */
+ if (!error) {
+ error = xfs_bmap_finish(&args->trans, args->flist,
+ &committed);
+ }
+ if (error) {
+ ASSERT(committed);
+ args->trans = NULL;
+ xfs_bmap_cancel(args->flist);
+ return(error);
+ }
+
+ /*
+ * bmap_finish() may have committed the last trans and started
+ * a new one. We need the inode to be in all transactions.
+ */
+ if (committed)
+ xfs_trans_ijoin(args->trans, dp, 0);
+ } else
+ xfs_da_buf_done(bp);
+ return(0);
+}
+
+/*
+ * Look up a name in a leaf attribute list structure.
+ *
+ * This leaf block cannot have a "remote" value, we only call this routine
+ * if bmap_one_block() says there is only one block (ie: no remote blks).
+ */
+STATIC int
+xfs_attr_leaf_get(xfs_da_args_t *args)
+{
+ xfs_dabuf_t *bp;
+ int error;
+
+ args->blkno = 0;
+ error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp,
+ XFS_ATTR_FORK);
+ if (error)
+ return(error);
+ ASSERT(bp != NULL);
+
+ error = xfs_attr_leaf_lookup_int(bp, args);
+ if (error != EEXIST) {
+ xfs_da_brelse(args->trans, bp);
+ return(error);
+ }
+ error = xfs_attr_leaf_getvalue(bp, args);
+ xfs_da_brelse(args->trans, bp);
+ if (!error && (args->rmtblkno > 0) && !(args->flags & ATTR_KERNOVAL)) {
+ error = xfs_attr_rmtval_get(args);
+ }
+ return(error);
+}
+
+/*
+ * Copy out attribute entries for attr_list(), for leaf attribute lists.
+ */
+STATIC int
+xfs_attr_leaf_list(xfs_attr_list_context_t *context)
+{
+ xfs_attr_leafblock_t *leaf;
+ int error;
+ xfs_dabuf_t *bp;
+
+ context->cursor->blkno = 0;
+ error = xfs_da_read_buf(NULL, context->dp, 0, -1, &bp, XFS_ATTR_FORK);
+ if (error)
+ return XFS_ERROR(error);
+ ASSERT(bp != NULL);
+ leaf = bp->data;
+ if (unlikely(leaf->hdr.info.magic != cpu_to_be16(XFS_ATTR_LEAF_MAGIC))) {
+ XFS_CORRUPTION_ERROR("xfs_attr_leaf_list", XFS_ERRLEVEL_LOW,
+ context->dp->i_mount, leaf);
+ xfs_da_brelse(NULL, bp);
+ return XFS_ERROR(EFSCORRUPTED);
+ }
+
+ error = xfs_attr_leaf_list_int(bp, context);
+ xfs_da_brelse(NULL, bp);
+ return XFS_ERROR(error);
+}
+
+
+/*========================================================================
+ * External routines when attribute list size > XFS_LBSIZE(mp).
+ *========================================================================*/
+
+/*
+ * Add a name to a Btree-format attribute list.
+ *
+ * This will involve walking down the Btree, and may involve splitting
+ * leaf nodes and even splitting intermediate nodes up to and including
+ * the root node (a special case of an intermediate node).
+ *
+ * "Remote" attribute values confuse the issue and atomic rename operations
+ * add a whole extra layer of confusion on top of that.
+ */
+STATIC int
+xfs_attr_node_addname(xfs_da_args_t *args)
+{
+ xfs_da_state_t *state;
+ xfs_da_state_blk_t *blk;
+ xfs_inode_t *dp;
+ xfs_mount_t *mp;
+ int committed, retval, error;
+
+ trace_xfs_attr_node_addname(args);
+
+ /*
+ * Fill in bucket of arguments/results/context to carry around.
+ */
+ dp = args->dp;
+ mp = dp->i_mount;
+restart:
+ state = xfs_da_state_alloc();
+ state->args = args;
+ state->mp = mp;
+ state->blocksize = state->mp->m_sb.sb_blocksize;
+ state->node_ents = state->mp->m_attr_node_ents;
+
+ /*
+ * Search to see if name already exists, and get back a pointer
+ * to where it should go.
+ */
+ error = xfs_da_node_lookup_int(state, &retval);
+ if (error)
+ goto out;
+ blk = &state->path.blk[ state->path.active-1 ];
+ ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC);
+ if ((args->flags & ATTR_REPLACE) && (retval == ENOATTR)) {
+ goto out;
+ } else if (retval == EEXIST) {
+ if (args->flags & ATTR_CREATE)
+ goto out;
+
+ trace_xfs_attr_node_replace(args);
+
+ args->op_flags |= XFS_DA_OP_RENAME; /* atomic rename op */
+ args->blkno2 = args->blkno; /* set 2nd entry info*/
+ args->index2 = args->index;
+ args->rmtblkno2 = args->rmtblkno;
+ args->rmtblkcnt2 = args->rmtblkcnt;
+ args->rmtblkno = 0;
+ args->rmtblkcnt = 0;
+ }
+
+ retval = xfs_attr_leaf_add(blk->bp, state->args);
+ if (retval == ENOSPC) {
+ if (state->path.active == 1) {
+ /*
+ * Its really a single leaf node, but it had
+ * out-of-line values so it looked like it *might*
+ * have been a b-tree.
+ */
+ xfs_da_state_free(state);
+ xfs_bmap_init(args->flist, args->firstblock);
+ error = xfs_attr_leaf_to_node(args);
+ if (!error) {
+ error = xfs_bmap_finish(&args->trans,
+ args->flist,
+ &committed);
+ }
+ if (error) {
+ ASSERT(committed);
+ args->trans = NULL;
+ xfs_bmap_cancel(args->flist);
+ goto out;
+ }
+
+ /*
+ * bmap_finish() may have committed the last trans
+ * and started a new one. We need the inode to be
+ * in all transactions.
+ */
+ if (committed)
+ xfs_trans_ijoin(args->trans, dp, 0);
+
+ /*
+ * Commit the node conversion and start the next
+ * trans in the chain.
+ */
+ error = xfs_trans_roll(&args->trans, dp);
+ if (error)
+ goto out;
+
+ goto restart;
+ }
+
+ /*
+ * Split as many Btree elements as required.
+ * This code tracks the new and old attr's location
+ * in the index/blkno/rmtblkno/rmtblkcnt fields and
+ * in the index2/blkno2/rmtblkno2/rmtblkcnt2 fields.
+ */
+ xfs_bmap_init(args->flist, args->firstblock);
+ error = xfs_da_split(state);
+ if (!error) {
+ error = xfs_bmap_finish(&args->trans, args->flist,
+ &committed);
+ }
+ if (error) {
+ ASSERT(committed);
+ args->trans = NULL;
+ xfs_bmap_cancel(args->flist);
+ goto out;
+ }
+
+ /*
+ * bmap_finish() may have committed the last trans and started
+ * a new one. We need the inode to be in all transactions.
+ */
+ if (committed)
+ xfs_trans_ijoin(args->trans, dp, 0);
+ } else {
+ /*
+ * Addition succeeded, update Btree hashvals.
+ */
+ xfs_da_fixhashpath(state, &state->path);
+ }
+
+ /*
+ * Kill the state structure, we're done with it and need to
+ * allow the buffers to come back later.
+ */
+ xfs_da_state_free(state);
+ state = NULL;
+
+ /*
+ * Commit the leaf addition or btree split and start the next
+ * trans in the chain.
+ */
+ error = xfs_trans_roll(&args->trans, dp);
+ if (error)
+ goto out;
+
+ /*
+ * If there was an out-of-line value, allocate the blocks we
+ * identified for its storage and copy the value. This is done
+ * after we create the attribute so that we don't overflow the
+ * maximum size of a transaction and/or hit a deadlock.
+ */
+ if (args->rmtblkno > 0) {
+ error = xfs_attr_rmtval_set(args);
+ if (error)
+ return(error);
+ }
+
+ /*
+ * If this is an atomic rename operation, we must "flip" the
+ * incomplete flags on the "new" and "old" attribute/value pairs
+ * so that one disappears and one appears atomically. Then we
+ * must remove the "old" attribute/value pair.
+ */
+ if (args->op_flags & XFS_DA_OP_RENAME) {
+ /*
+ * In a separate transaction, set the incomplete flag on the
+ * "old" attr and clear the incomplete flag on the "new" attr.
+ */
+ error = xfs_attr_leaf_flipflags(args);
+ if (error)
+ goto out;
+
+ /*
+ * Dismantle the "old" attribute/value pair by removing
+ * a "remote" value (if it exists).
+ */
+ args->index = args->index2;
+ args->blkno = args->blkno2;
+ args->rmtblkno = args->rmtblkno2;
+ args->rmtblkcnt = args->rmtblkcnt2;
+ if (args->rmtblkno) {
+ error = xfs_attr_rmtval_remove(args);
+ if (error)
+ return(error);
+ }
+
+ /*
+ * Re-find the "old" attribute entry after any split ops.
+ * The INCOMPLETE flag means that we will find the "old"
+ * attr, not the "new" one.
+ */
+ args->flags |= XFS_ATTR_INCOMPLETE;
+ state = xfs_da_state_alloc();
+ state->args = args;
+ state->mp = mp;
+ state->blocksize = state->mp->m_sb.sb_blocksize;
+ state->node_ents = state->mp->m_attr_node_ents;
+ state->inleaf = 0;
+ error = xfs_da_node_lookup_int(state, &retval);
+ if (error)
+ goto out;
+
+ /*
+ * Remove the name and update the hashvals in the tree.
+ */
+ blk = &state->path.blk[ state->path.active-1 ];
+ ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC);
+ error = xfs_attr_leaf_remove(blk->bp, args);
+ xfs_da_fixhashpath(state, &state->path);
+
+ /*
+ * Check to see if the tree needs to be collapsed.
+ */
+ if (retval && (state->path.active > 1)) {
+ xfs_bmap_init(args->flist, args->firstblock);
+ error = xfs_da_join(state);
+ if (!error) {
+ error = xfs_bmap_finish(&args->trans,
+ args->flist,
+ &committed);
+ }
+ if (error) {
+ ASSERT(committed);
+ args->trans = NULL;
+ xfs_bmap_cancel(args->flist);
+ goto out;
+ }
+
+ /*
+ * bmap_finish() may have committed the last trans
+ * and started a new one. We need the inode to be
+ * in all transactions.
+ */
+ if (committed)
+ xfs_trans_ijoin(args->trans, dp, 0);
+ }
+
+ /*
+ * Commit and start the next trans in the chain.
+ */
+ error = xfs_trans_roll(&args->trans, dp);
+ if (error)
+ goto out;
+
+ } else if (args->rmtblkno > 0) {
+ /*
+ * Added a "remote" value, just clear the incomplete flag.
+ */
+ error = xfs_attr_leaf_clearflag(args);
+ if (error)
+ goto out;
+ }
+ retval = error = 0;
+
+out:
+ if (state)
+ xfs_da_state_free(state);
+ if (error)
+ return(error);
+ return(retval);
+}
+
+/*
+ * Remove a name from a B-tree attribute list.
+ *
+ * This will involve walking down the Btree, and may involve joining
+ * leaf nodes and even joining intermediate nodes up to and including
+ * the root node (a special case of an intermediate node).
+ */
+STATIC int
+xfs_attr_node_removename(xfs_da_args_t *args)
+{
+ xfs_da_state_t *state;
+ xfs_da_state_blk_t *blk;
+ xfs_inode_t *dp;
+ xfs_dabuf_t *bp;
+ int retval, error, committed, forkoff;
+
+ trace_xfs_attr_node_removename(args);
+
+ /*
+ * Tie a string around our finger to remind us where we are.
+ */
+ dp = args->dp;
+ state = xfs_da_state_alloc();
+ state->args = args;
+ state->mp = dp->i_mount;
+ state->blocksize = state->mp->m_sb.sb_blocksize;
+ state->node_ents = state->mp->m_attr_node_ents;
+
+ /*
+ * Search to see if name exists, and get back a pointer to it.
+ */
+ error = xfs_da_node_lookup_int(state, &retval);
+ if (error || (retval != EEXIST)) {
+ if (error == 0)
+ error = retval;
+ goto out;
+ }
+
+ /*
+ * If there is an out-of-line value, de-allocate the blocks.
+ * This is done before we remove the attribute so that we don't
+ * overflow the maximum size of a transaction and/or hit a deadlock.
+ */
+ blk = &state->path.blk[ state->path.active-1 ];
+ ASSERT(blk->bp != NULL);
+ ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC);
+ if (args->rmtblkno > 0) {
+ /*
+ * Fill in disk block numbers in the state structure
+ * so that we can get the buffers back after we commit
+ * several transactions in the following calls.
+ */
+ error = xfs_attr_fillstate(state);
+ if (error)
+ goto out;
+
+ /*
+ * Mark the attribute as INCOMPLETE, then bunmapi() the
+ * remote value.
+ */
+ error = xfs_attr_leaf_setflag(args);
+ if (error)
+ goto out;
+ error = xfs_attr_rmtval_remove(args);
+ if (error)
+ goto out;
+
+ /*
+ * Refill the state structure with buffers, the prior calls
+ * released our buffers.
+ */
+ error = xfs_attr_refillstate(state);
+ if (error)
+ goto out;
+ }
+
+ /*
+ * Remove the name and update the hashvals in the tree.
+ */
+ blk = &state->path.blk[ state->path.active-1 ];
+ ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC);
+ retval = xfs_attr_leaf_remove(blk->bp, args);
+ xfs_da_fixhashpath(state, &state->path);
+
+ /*
+ * Check to see if the tree needs to be collapsed.
+ */
+ if (retval && (state->path.active > 1)) {
+ xfs_bmap_init(args->flist, args->firstblock);
+ error = xfs_da_join(state);
+ if (!error) {
+ error = xfs_bmap_finish(&args->trans, args->flist,
+ &committed);
+ }
+ if (error) {
+ ASSERT(committed);
+ args->trans = NULL;
+ xfs_bmap_cancel(args->flist);
+ goto out;
+ }
+
+ /*
+ * bmap_finish() may have committed the last trans and started
+ * a new one. We need the inode to be in all transactions.
+ */
+ if (committed)
+ xfs_trans_ijoin(args->trans, dp, 0);
+
+ /*
+ * Commit the Btree join operation and start a new trans.
+ */
+ error = xfs_trans_roll(&args->trans, dp);
+ if (error)
+ goto out;
+ }
+
+ /*
+ * If the result is small enough, push it all into the inode.
+ */
+ if (xfs_bmap_one_block(dp, XFS_ATTR_FORK)) {
+ /*
+ * Have to get rid of the copy of this dabuf in the state.
+ */
+ ASSERT(state->path.active == 1);
+ ASSERT(state->path.blk[0].bp);
+ xfs_da_buf_done(state->path.blk[0].bp);
+ state->path.blk[0].bp = NULL;
+
+ error = xfs_da_read_buf(args->trans, args->dp, 0, -1, &bp,
+ XFS_ATTR_FORK);
+ if (error)
+ goto out;
+ ASSERT((((xfs_attr_leafblock_t *)bp->data)->hdr.info.magic) ==
+ cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
+
+ if ((forkoff = xfs_attr_shortform_allfit(bp, dp))) {
+ xfs_bmap_init(args->flist, args->firstblock);
+ error = xfs_attr_leaf_to_shortform(bp, args, forkoff);
+ /* bp is gone due to xfs_da_shrink_inode */
+ if (!error) {
+ error = xfs_bmap_finish(&args->trans,
+ args->flist,
+ &committed);
+ }
+ if (error) {
+ ASSERT(committed);
+ args->trans = NULL;
+ xfs_bmap_cancel(args->flist);
+ goto out;
+ }
+
+ /*
+ * bmap_finish() may have committed the last trans
+ * and started a new one. We need the inode to be
+ * in all transactions.
+ */
+ if (committed)
+ xfs_trans_ijoin(args->trans, dp, 0);
+ } else
+ xfs_da_brelse(args->trans, bp);
+ }
+ error = 0;
+
+out:
+ xfs_da_state_free(state);
+ return(error);
+}
+
+/*
+ * Fill in the disk block numbers in the state structure for the buffers
+ * that are attached to the state structure.
+ * This is done so that we can quickly reattach ourselves to those buffers
+ * after some set of transaction commits have released these buffers.
+ */
+STATIC int
+xfs_attr_fillstate(xfs_da_state_t *state)
+{
+ xfs_da_state_path_t *path;
+ xfs_da_state_blk_t *blk;
+ int level;
+
+ /*
+ * Roll down the "path" in the state structure, storing the on-disk
+ * block number for those buffers in the "path".
+ */
+ path = &state->path;
+ ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH));
+ for (blk = path->blk, level = 0; level < path->active; blk++, level++) {
+ if (blk->bp) {
+ blk->disk_blkno = xfs_da_blkno(blk->bp);
+ xfs_da_buf_done(blk->bp);
+ blk->bp = NULL;
+ } else {
+ blk->disk_blkno = 0;
+ }
+ }
+
+ /*
+ * Roll down the "altpath" in the state structure, storing the on-disk
+ * block number for those buffers in the "altpath".
+ */
+ path = &state->altpath;
+ ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH));
+ for (blk = path->blk, level = 0; level < path->active; blk++, level++) {
+ if (blk->bp) {
+ blk->disk_blkno = xfs_da_blkno(blk->bp);
+ xfs_da_buf_done(blk->bp);
+ blk->bp = NULL;
+ } else {
+ blk->disk_blkno = 0;
+ }
+ }
+
+ return(0);
+}
+
+/*
+ * Reattach the buffers to the state structure based on the disk block
+ * numbers stored in the state structure.
+ * This is done after some set of transaction commits have released those
+ * buffers from our grip.
+ */
+STATIC int
+xfs_attr_refillstate(xfs_da_state_t *state)
+{
+ xfs_da_state_path_t *path;
+ xfs_da_state_blk_t *blk;
+ int level, error;
+
+ /*
+ * Roll down the "path" in the state structure, storing the on-disk
+ * block number for those buffers in the "path".
+ */
+ path = &state->path;
+ ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH));
+ for (blk = path->blk, level = 0; level < path->active; blk++, level++) {
+ if (blk->disk_blkno) {
+ error = xfs_da_read_buf(state->args->trans,
+ state->args->dp,
+ blk->blkno, blk->disk_blkno,
+ &blk->bp, XFS_ATTR_FORK);
+ if (error)
+ return(error);
+ } else {
+ blk->bp = NULL;
+ }
+ }
+
+ /*
+ * Roll down the "altpath" in the state structure, storing the on-disk
+ * block number for those buffers in the "altpath".
+ */
+ path = &state->altpath;
+ ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH));
+ for (blk = path->blk, level = 0; level < path->active; blk++, level++) {
+ if (blk->disk_blkno) {
+ error = xfs_da_read_buf(state->args->trans,
+ state->args->dp,
+ blk->blkno, blk->disk_blkno,
+ &blk->bp, XFS_ATTR_FORK);
+ if (error)
+ return(error);
+ } else {
+ blk->bp = NULL;
+ }
+ }
+
+ return(0);
+}
+
+/*
+ * Look up a filename in a node attribute list.
+ *
+ * This routine gets called for any attribute fork that has more than one
+ * block, ie: both true Btree attr lists and for single-leaf-blocks with
+ * "remote" values taking up more blocks.
+ */
+STATIC int
+xfs_attr_node_get(xfs_da_args_t *args)
+{
+ xfs_da_state_t *state;
+ xfs_da_state_blk_t *blk;
+ int error, retval;
+ int i;
+
+ state = xfs_da_state_alloc();
+ state->args = args;
+ state->mp = args->dp->i_mount;
+ state->blocksize = state->mp->m_sb.sb_blocksize;
+ state->node_ents = state->mp->m_attr_node_ents;
+
+ /*
+ * Search to see if name exists, and get back a pointer to it.
+ */
+ error = xfs_da_node_lookup_int(state, &retval);
+ if (error) {
+ retval = error;
+ } else if (retval == EEXIST) {
+ blk = &state->path.blk[ state->path.active-1 ];
+ ASSERT(blk->bp != NULL);
+ ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC);
+
+ /*
+ * Get the value, local or "remote"
+ */
+ retval = xfs_attr_leaf_getvalue(blk->bp, args);
+ if (!retval && (args->rmtblkno > 0)
+ && !(args->flags & ATTR_KERNOVAL)) {
+ retval = xfs_attr_rmtval_get(args);
+ }
+ }
+
+ /*
+ * If not in a transaction, we have to release all the buffers.
+ */
+ for (i = 0; i < state->path.active; i++) {
+ xfs_da_brelse(args->trans, state->path.blk[i].bp);
+ state->path.blk[i].bp = NULL;
+ }
+
+ xfs_da_state_free(state);
+ return(retval);
+}
+
+STATIC int /* error */
+xfs_attr_node_list(xfs_attr_list_context_t *context)
+{
+ attrlist_cursor_kern_t *cursor;
+ xfs_attr_leafblock_t *leaf;
+ xfs_da_intnode_t *node;
+ xfs_da_node_entry_t *btree;
+ int error, i;
+ xfs_dabuf_t *bp;
+
+ cursor = context->cursor;
+ cursor->initted = 1;
+
+ /*
+ * Do all sorts of validation on the passed-in cursor structure.
+ * If anything is amiss, ignore the cursor and look up the hashval
+ * starting from the btree root.
+ */
+ bp = NULL;
+ if (cursor->blkno > 0) {
+ error = xfs_da_read_buf(NULL, context->dp, cursor->blkno, -1,
+ &bp, XFS_ATTR_FORK);
+ if ((error != 0) && (error != EFSCORRUPTED))
+ return(error);
+ if (bp) {
+ node = bp->data;
+ switch (be16_to_cpu(node->hdr.info.magic)) {
+ case XFS_DA_NODE_MAGIC:
+ trace_xfs_attr_list_wrong_blk(context);
+ xfs_da_brelse(NULL, bp);
+ bp = NULL;
+ break;
+ case XFS_ATTR_LEAF_MAGIC:
+ leaf = bp->data;
+ if (cursor->hashval > be32_to_cpu(leaf->entries[
+ be16_to_cpu(leaf->hdr.count)-1].hashval)) {
+ trace_xfs_attr_list_wrong_blk(context);
+ xfs_da_brelse(NULL, bp);
+ bp = NULL;
+ } else if (cursor->hashval <=
+ be32_to_cpu(leaf->entries[0].hashval)) {
+ trace_xfs_attr_list_wrong_blk(context);
+ xfs_da_brelse(NULL, bp);
+ bp = NULL;
+ }
+ break;
+ default:
+ trace_xfs_attr_list_wrong_blk(context);
+ xfs_da_brelse(NULL, bp);
+ bp = NULL;
+ }
+ }
+ }
+
+ /*
+ * We did not find what we expected given the cursor's contents,
+ * so we start from the top and work down based on the hash value.
+ * Note that start of node block is same as start of leaf block.
+ */
+ if (bp == NULL) {
+ cursor->blkno = 0;
+ for (;;) {
+ error = xfs_da_read_buf(NULL, context->dp,
+ cursor->blkno, -1, &bp,
+ XFS_ATTR_FORK);
+ if (error)
+ return(error);
+ if (unlikely(bp == NULL)) {
+ XFS_ERROR_REPORT("xfs_attr_node_list(2)",
+ XFS_ERRLEVEL_LOW,
+ context->dp->i_mount);
+ return(XFS_ERROR(EFSCORRUPTED));
+ }
+ node = bp->data;
+ if (node->hdr.info.magic ==
+ cpu_to_be16(XFS_ATTR_LEAF_MAGIC))
+ break;
+ if (unlikely(node->hdr.info.magic !=
+ cpu_to_be16(XFS_DA_NODE_MAGIC))) {
+ XFS_CORRUPTION_ERROR("xfs_attr_node_list(3)",
+ XFS_ERRLEVEL_LOW,
+ context->dp->i_mount,
+ node);
+ xfs_da_brelse(NULL, bp);
+ return(XFS_ERROR(EFSCORRUPTED));
+ }
+ btree = node->btree;
+ for (i = 0; i < be16_to_cpu(node->hdr.count);
+ btree++, i++) {
+ if (cursor->hashval
+ <= be32_to_cpu(btree->hashval)) {
+ cursor->blkno = be32_to_cpu(btree->before);
+ trace_xfs_attr_list_node_descend(context,
+ btree);
+ break;
+ }
+ }
+ if (i == be16_to_cpu(node->hdr.count)) {
+ xfs_da_brelse(NULL, bp);
+ return(0);
+ }
+ xfs_da_brelse(NULL, bp);
+ }
+ }
+ ASSERT(bp != NULL);
+
+ /*
+ * Roll upward through the blocks, processing each leaf block in
+ * order. As long as there is space in the result buffer, keep
+ * adding the information.
+ */
+ for (;;) {
+ leaf = bp->data;
+ if (unlikely(leaf->hdr.info.magic !=
+ cpu_to_be16(XFS_ATTR_LEAF_MAGIC))) {
+ XFS_CORRUPTION_ERROR("xfs_attr_node_list(4)",
+ XFS_ERRLEVEL_LOW,
+ context->dp->i_mount, leaf);
+ xfs_da_brelse(NULL, bp);
+ return(XFS_ERROR(EFSCORRUPTED));
+ }
+ error = xfs_attr_leaf_list_int(bp, context);
+ if (error) {
+ xfs_da_brelse(NULL, bp);
+ return error;
+ }
+ if (context->seen_enough || leaf->hdr.info.forw == 0)
+ break;
+ cursor->blkno = be32_to_cpu(leaf->hdr.info.forw);
+ xfs_da_brelse(NULL, bp);
+ error = xfs_da_read_buf(NULL, context->dp, cursor->blkno, -1,
+ &bp, XFS_ATTR_FORK);
+ if (error)
+ return(error);
+ if (unlikely((bp == NULL))) {
+ XFS_ERROR_REPORT("xfs_attr_node_list(5)",
+ XFS_ERRLEVEL_LOW,
+ context->dp->i_mount);
+ return(XFS_ERROR(EFSCORRUPTED));
+ }
+ }
+ xfs_da_brelse(NULL, bp);
+ return(0);
+}
+
+
+/*========================================================================
+ * External routines for manipulating out-of-line attribute values.
+ *========================================================================*/
+
+/*
+ * Read the value associated with an attribute from the out-of-line buffer
+ * that we stored it in.
+ */
+int
+xfs_attr_rmtval_get(xfs_da_args_t *args)
+{
+ xfs_bmbt_irec_t map[ATTR_RMTVALUE_MAPSIZE];
+ xfs_mount_t *mp;
+ xfs_daddr_t dblkno;
+ void *dst;
+ xfs_buf_t *bp;
+ int nmap, error, tmp, valuelen, blkcnt, i;
+ xfs_dablk_t lblkno;
+
+ ASSERT(!(args->flags & ATTR_KERNOVAL));
+
+ mp = args->dp->i_mount;
+ dst = args->value;
+ valuelen = args->valuelen;
+ lblkno = args->rmtblkno;
+ while (valuelen > 0) {
+ nmap = ATTR_RMTVALUE_MAPSIZE;
+ error = xfs_bmapi_read(args->dp, (xfs_fileoff_t)lblkno,
+ args->rmtblkcnt, map, &nmap,
+ XFS_BMAPI_ATTRFORK);
+ if (error)
+ return(error);
+ ASSERT(nmap >= 1);
+
+ for (i = 0; (i < nmap) && (valuelen > 0); i++) {
+ ASSERT((map[i].br_startblock != DELAYSTARTBLOCK) &&
+ (map[i].br_startblock != HOLESTARTBLOCK));
+ dblkno = XFS_FSB_TO_DADDR(mp, map[i].br_startblock);
+ blkcnt = XFS_FSB_TO_BB(mp, map[i].br_blockcount);
+ error = xfs_read_buf(mp, mp->m_ddev_targp, dblkno,
+ blkcnt, XBF_LOCK | XBF_DONT_BLOCK,
+ &bp);
+ if (error)
+ return(error);
+
+ tmp = (valuelen < XFS_BUF_SIZE(bp))
+ ? valuelen : XFS_BUF_SIZE(bp);
+ xfs_buf_iomove(bp, 0, tmp, dst, XBRW_READ);
+ xfs_buf_relse(bp);
+ dst += tmp;
+ valuelen -= tmp;
+
+ lblkno += map[i].br_blockcount;
+ }
+ }
+ ASSERT(valuelen == 0);
+ return(0);
+}
+
+/*
+ * Write the value associated with an attribute into the out-of-line buffer
+ * that we have defined for it.
+ */
+STATIC int
+xfs_attr_rmtval_set(xfs_da_args_t *args)
+{
+ xfs_mount_t *mp;
+ xfs_fileoff_t lfileoff;
+ xfs_inode_t *dp;
+ xfs_bmbt_irec_t map;
+ xfs_daddr_t dblkno;
+ void *src;
+ xfs_buf_t *bp;
+ xfs_dablk_t lblkno;
+ int blkcnt, valuelen, nmap, error, tmp, committed;
+
+ dp = args->dp;
+ mp = dp->i_mount;
+ src = args->value;
+
+ /*
+ * Find a "hole" in the attribute address space large enough for
+ * us to drop the new attribute's value into.
+ */
+ blkcnt = XFS_B_TO_FSB(mp, args->valuelen);
+ lfileoff = 0;
+ error = xfs_bmap_first_unused(args->trans, args->dp, blkcnt, &lfileoff,
+ XFS_ATTR_FORK);
+ if (error) {
+ return(error);
+ }
+ args->rmtblkno = lblkno = (xfs_dablk_t)lfileoff;
+ args->rmtblkcnt = blkcnt;
+
+ /*
+ * Roll through the "value", allocating blocks on disk as required.
+ */
+ while (blkcnt > 0) {
+ /*
+ * Allocate a single extent, up to the size of the value.
+ */
+ xfs_bmap_init(args->flist, args->firstblock);
+ nmap = 1;
+ error = xfs_bmapi_write(args->trans, dp, (xfs_fileoff_t)lblkno,
+ blkcnt,
+ XFS_BMAPI_ATTRFORK | XFS_BMAPI_METADATA,
+ args->firstblock, args->total, &map, &nmap,
+ args->flist);
+ if (!error) {
+ error = xfs_bmap_finish(&args->trans, args->flist,
+ &committed);
+ }
+ if (error) {
+ ASSERT(committed);
+ args->trans = NULL;
+ xfs_bmap_cancel(args->flist);
+ return(error);
+ }
+
+ /*
+ * bmap_finish() may have committed the last trans and started
+ * a new one. We need the inode to be in all transactions.
+ */
+ if (committed)
+ xfs_trans_ijoin(args->trans, dp, 0);
+
+ ASSERT(nmap == 1);
+ ASSERT((map.br_startblock != DELAYSTARTBLOCK) &&
+ (map.br_startblock != HOLESTARTBLOCK));
+ lblkno += map.br_blockcount;
+ blkcnt -= map.br_blockcount;
+
+ /*
+ * Start the next trans in the chain.
+ */
+ error = xfs_trans_roll(&args->trans, dp);
+ if (error)
+ return (error);
+ }
+
+ /*
+ * Roll through the "value", copying the attribute value to the
+ * already-allocated blocks. Blocks are written synchronously
+ * so that we can know they are all on disk before we turn off
+ * the INCOMPLETE flag.
+ */
+ lblkno = args->rmtblkno;
+ valuelen = args->valuelen;
+ while (valuelen > 0) {
+ /*
+ * Try to remember where we decided to put the value.
+ */
+ xfs_bmap_init(args->flist, args->firstblock);
+ nmap = 1;
+ error = xfs_bmapi_read(dp, (xfs_fileoff_t)lblkno,
+ args->rmtblkcnt, &map, &nmap,
+ XFS_BMAPI_ATTRFORK);
+ if (error)
+ return(error);
+ ASSERT(nmap == 1);
+ ASSERT((map.br_startblock != DELAYSTARTBLOCK) &&
+ (map.br_startblock != HOLESTARTBLOCK));
+
+ dblkno = XFS_FSB_TO_DADDR(mp, map.br_startblock),
+ blkcnt = XFS_FSB_TO_BB(mp, map.br_blockcount);
+
+ bp = xfs_buf_get(mp->m_ddev_targp, dblkno, blkcnt,
+ XBF_LOCK | XBF_DONT_BLOCK);
+ if (!bp)
+ return ENOMEM;
+ tmp = (valuelen < XFS_BUF_SIZE(bp)) ? valuelen :
+ XFS_BUF_SIZE(bp);
+ xfs_buf_iomove(bp, 0, tmp, src, XBRW_WRITE);
+ if (tmp < XFS_BUF_SIZE(bp))
+ xfs_buf_zero(bp, tmp, XFS_BUF_SIZE(bp) - tmp);
+ error = xfs_bwrite(bp); /* GROT: NOTE: synchronous write */
+ xfs_buf_relse(bp);
+ if (error)
+ return error;
+ src += tmp;
+ valuelen -= tmp;
+
+ lblkno += map.br_blockcount;
+ }
+ ASSERT(valuelen == 0);
+ return(0);
+}
+
+/*
+ * Remove the value associated with an attribute by deleting the
+ * out-of-line buffer that it is stored on.
+ */
+STATIC int
+xfs_attr_rmtval_remove(xfs_da_args_t *args)
+{
+ xfs_mount_t *mp;
+ xfs_bmbt_irec_t map;
+ xfs_buf_t *bp;
+ xfs_daddr_t dblkno;
+ xfs_dablk_t lblkno;
+ int valuelen, blkcnt, nmap, error, done, committed;
+
+ mp = args->dp->i_mount;
+
+ /*
+ * Roll through the "value", invalidating the attribute value's
+ * blocks.
+ */
+ lblkno = args->rmtblkno;
+ valuelen = args->rmtblkcnt;
+ while (valuelen > 0) {
+ /*
+ * Try to remember where we decided to put the value.
+ */
+ nmap = 1;
+ error = xfs_bmapi_read(args->dp, (xfs_fileoff_t)lblkno,
+ args->rmtblkcnt, &map, &nmap,
+ XFS_BMAPI_ATTRFORK);
+ if (error)
+ return(error);
+ ASSERT(nmap == 1);
+ ASSERT((map.br_startblock != DELAYSTARTBLOCK) &&
+ (map.br_startblock != HOLESTARTBLOCK));
+
+ dblkno = XFS_FSB_TO_DADDR(mp, map.br_startblock),
+ blkcnt = XFS_FSB_TO_BB(mp, map.br_blockcount);
+
+ /*
+ * If the "remote" value is in the cache, remove it.
+ */
+ bp = xfs_incore(mp->m_ddev_targp, dblkno, blkcnt, XBF_TRYLOCK);
+ if (bp) {
+ xfs_buf_stale(bp);
+ xfs_buf_relse(bp);
+ bp = NULL;
+ }
+
+ valuelen -= map.br_blockcount;
+
+ lblkno += map.br_blockcount;
+ }
+
+ /*
+ * Keep de-allocating extents until the remote-value region is gone.
+ */
+ lblkno = args->rmtblkno;
+ blkcnt = args->rmtblkcnt;
+ done = 0;
+ while (!done) {
+ xfs_bmap_init(args->flist, args->firstblock);
+ error = xfs_bunmapi(args->trans, args->dp, lblkno, blkcnt,
+ XFS_BMAPI_ATTRFORK | XFS_BMAPI_METADATA,
+ 1, args->firstblock, args->flist,
+ &done);
+ if (!error) {
+ error = xfs_bmap_finish(&args->trans, args->flist,
+ &committed);
+ }
+ if (error) {
+ ASSERT(committed);
+ args->trans = NULL;
+ xfs_bmap_cancel(args->flist);
+ return(error);
+ }
+
+ /*
+ * bmap_finish() may have committed the last trans and started
+ * a new one. We need the inode to be in all transactions.
+ */
+ if (committed)
+ xfs_trans_ijoin(args->trans, args->dp, 0);
+
+ /*
+ * Close out trans and start the next one in the chain.
+ */
+ error = xfs_trans_roll(&args->trans, args->dp);
+ if (error)
+ return (error);
+ }
+ return(0);
+}