#include "xfs_trans_space.h"
#include "xfs_trace.h"
#include "xfs_attr_item.h"
+#include "xfs_log.h"
struct kmem_cache *xfs_attri_cache;
struct kmem_cache *xfs_attrd_cache;
int error, local;
int rmt_blks = 0;
unsigned int total;
+ int delayed = xfs_has_larp(mp);
if (xfs_is_shutdown(dp->i_mount))
return -EIO;
rmt_blks = xfs_attr3_rmt_blocks(mp, XFS_XATTR_SIZE_MAX);
}
+ if (delayed) {
+ error = xfs_attr_use_log_assist(mp);
+ if (error)
+ return error;
+ }
+
/*
* Root fork attributes can use reserved data blocks for this
* operation if necessary
*/
error = xfs_trans_alloc_inode(dp, &tres, total, 0, rsvd, &args->trans);
if (error)
- return error;
+ goto drop_incompat;
if (args->value || xfs_inode_hasattr(dp)) {
error = xfs_iext_count_may_overflow(dp, XFS_ATTR_FORK,
if (error != -ENOATTR && error != -EEXIST)
goto out_trans_cancel;
- error = xfs_attr_set_args(args);
+ error = xfs_attr_set_deferred(args);
if (error)
goto out_trans_cancel;
+
/* shortform attribute has already been committed */
if (!args->trans)
goto out_unlock;
if (error != -EEXIST)
goto out_trans_cancel;
- error = xfs_attr_remove_args(args);
+ error = xfs_attr_remove_deferred(args);
if (error)
goto out_trans_cancel;
}
error = xfs_trans_commit(args->trans);
out_unlock:
xfs_iunlock(dp, XFS_ILOCK_EXCL);
+drop_incompat:
+ if (delayed)
+ xlog_drop_incompat_feat(mp->m_log);
return error;
out_trans_cancel:
xfs_attrd_cache = NULL;
}
+STATIC int
+xfs_attr_item_init(
+ struct xfs_da_args *args,
+ unsigned int op_flags, /* op flag (set or remove) */
+ struct xfs_attr_item **attr) /* new xfs_attr_item */
+{
+
+ struct xfs_attr_item *new;
+
+ new = kmem_zalloc(sizeof(struct xfs_attr_item), KM_NOFS);
+ new->xattri_op_flags = op_flags;
+ new->xattri_dac.da_args = args;
+
+ *attr = new;
+ return 0;
+}
+
+/* Sets an attribute for an inode as a deferred operation */
+int
+xfs_attr_set_deferred(
+ struct xfs_da_args *args)
+{
+ struct xfs_attr_item *new;
+ int error = 0;
+
+ error = xfs_attr_item_init(args, XFS_ATTR_OP_FLAGS_SET, &new);
+ if (error)
+ return error;
+
+ xfs_defer_add(args->trans, XFS_DEFER_OPS_TYPE_ATTR, &new->xattri_list);
+
+ return 0;
+}
+
+/* Removes an attribute for an inode as a deferred operation */
+int
+xfs_attr_remove_deferred(
+ struct xfs_da_args *args)
+{
+
+ struct xfs_attr_item *new;
+ int error;
+
+ error = xfs_attr_item_init(args, XFS_ATTR_OP_FLAGS_REMOVE, &new);
+ if (error)
+ return error;
+
+ xfs_defer_add(args->trans, XFS_DEFER_OPS_TYPE_ATTR, &new->xattri_list);
+
+ return 0;
+}
+
/*========================================================================
* External routines when attribute list is inside the inode
*========================================================================*/
{
up_read(&log->l_incompat_users);
}
+
+/*
+ * Get permission to use log-assisted atomic exchange of file extents.
+ *
+ * Callers must not be running any transactions or hold any inode locks, and
+ * they must release the permission by calling xlog_drop_incompat_feat
+ * when they're done.
+ */
+int
+xfs_attr_use_log_assist(
+ struct xfs_mount *mp)
+{
+ int error = 0;
+
+ /*
+ * Protect ourselves from an idle log clearing the logged xattrs log
+ * incompat feature bit.
+ */
+ xlog_use_incompat_feat(mp->m_log);
+
+ /*
+ * If log-assisted xattrs are already enabled, the caller can use the
+ * log assisted swap functions with the log-incompat reference we got.
+ */
+ if (xfs_sb_version_haslogxattrs(&mp->m_sb))
+ return 0;
+
+ /* Enable log-assisted xattrs. */
+ error = xfs_add_incompat_log_feature(mp,
+ XFS_SB_FEAT_INCOMPAT_LOG_XATTRS);
+ if (error)
+ goto drop_incompat;
+
+ xfs_warn_once(mp,
+"EXPERIMENTAL logged extended attributes feature added. Use at your own risk!");
+
+ return 0;
+drop_incompat:
+ xlog_drop_incompat_feat(mp->m_log);
+ return error;
+}