On Thu, 2022-04-14 at 19:44 +1000, Dave Chinner wrote:
> From: Dave Chinner <dchinner@xxxxxxxxxx>
>
> Clean up the final leaf/node states in xfs_attr_set_iter() to
> further simplify the highe level state machine and to set the
> completion state correctly.
>
> Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>
Ok, I can follow it
Reviewed-by: Allison Henderson<allison.henderson@xxxxxxxxxx>
> ---
> fs/xfs/libxfs/xfs_attr.c | 72 +++++++++++++++++++++++---------------
> --
> fs/xfs/libxfs/xfs_attr.h | 12 +++----
> fs/xfs/xfs_trace.h | 5 +--
> 3 files changed, 50 insertions(+), 39 deletions(-)
>
> diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
> index 8762d3a0605a..9dc08d59e4a6 100644
> --- a/fs/xfs/libxfs/xfs_attr.c
> +++ b/fs/xfs/libxfs/xfs_attr.c
> @@ -61,7 +61,7 @@ STATIC int xfs_attr_node_get(xfs_da_args_t *args);
> STATIC void xfs_attr_restore_rmt_blk(struct xfs_da_args *args);
> static int xfs_attr_node_try_addname(struct xfs_attr_item *attr);
> STATIC int xfs_attr_node_addname_find_attr(struct xfs_attr_item
> *attr);
> -STATIC int xfs_attr_node_addname_clear_incomplete(struct
> xfs_attr_item *attr);
> +STATIC int xfs_attr_node_remove_attr(struct xfs_attr_item *attr);
> STATIC int xfs_attr_node_hasname(xfs_da_args_t *args,
> struct xfs_da_state **state);
> STATIC int xfs_attr_fillstate(xfs_da_state_t *state);
> @@ -451,6 +451,36 @@ xfs_attr_rmtval_alloc(
> return error;
> }
>
> +/*
> + * Remove the original attr we have just replaced. This is dependent
> on the
> + * original lookup and insert placing the old attr in args-
> >blkno/args->index
> + * and the new attr in args->blkno2/args->index2.
> + */
> +static int
> +xfs_attr_leaf_remove_attr(
> + struct xfs_attr_item *attr)
> +{
> + struct xfs_da_args *args = attr->xattri_da_args;
> + struct xfs_inode *dp = args->dp;
> + struct xfs_buf *bp = NULL;
> + int forkoff;
> + int error;
> +
> + error = xfs_attr3_leaf_read(args->trans, args->dp, args->blkno,
> + &bp);
> + if (error)
> + return error;
> +
> + xfs_attr3_leaf_remove(bp, args);
> +
> + forkoff = xfs_attr_shortform_allfit(bp, dp);
> + if (forkoff)
> + error = xfs_attr3_leaf_to_shortform(bp, args, forkoff);
> + /* bp is gone due to xfs_da_shrink_inode */
> +
> + return error;
> +}
> +
> /*
> * Set the attribute specified in @args.
> * This routine is meant to function as a delayed operation, and may
> return
> @@ -463,9 +493,7 @@ xfs_attr_set_iter(
> struct xfs_attr_item *attr)
> {
> struct xfs_da_args *args = attr->xattri_da_args;
> - struct xfs_inode *dp = args->dp;
> - struct xfs_buf *bp = NULL;
> - int forkoff, error = 0;
> + int error = 0;
>
> /* State machine switch */
> next_state:
> @@ -564,32 +592,14 @@ xfs_attr_set_iter(
> attr->xattri_dela_state++;
> break;
>
> - case XFS_DAS_RD_LEAF:
> - /*
> - * This is the last step for leaf format. Read the
> block with
> - * the old attr, remove the old attr, check for
> shortform
> - * conversion and return.
> - */
> - error = xfs_attr3_leaf_read(args->trans, args->dp,
> args->blkno,
> - &bp);
> - if (error)
> - return error;
> -
> - xfs_attr3_leaf_remove(bp, args);
> -
> - forkoff = xfs_attr_shortform_allfit(bp, dp);
> - if (forkoff)
> - error = xfs_attr3_leaf_to_shortform(bp, args,
> forkoff);
> - /* bp is gone due to xfs_da_shrink_inode */
> -
> - return error;
> + case XFS_DAS_LEAF_REMOVE_ATTR:
> + error = xfs_attr_leaf_remove_attr(attr);
> + attr->xattri_dela_state = XFS_DAS_DONE;
> + break;
>
> - case XFS_DAS_CLR_FLAG:
> - /*
> - * The last state for node format. Look up the old attr
> and
> - * remove it.
> - */
> - error = xfs_attr_node_addname_clear_incomplete(attr);
> + case XFS_DAS_NODE_REMOVE_ATTR:
> + error = xfs_attr_node_remove_attr(attr);
> + attr->xattri_dela_state = XFS_DAS_DONE;
> break;
> default:
> ASSERT(0);
> @@ -1262,8 +1272,8 @@ xfs_attr_node_try_addname(
> }
>
>
> -STATIC int
> -xfs_attr_node_addname_clear_incomplete(
> +static int
> +xfs_attr_node_remove_attr(
> struct xfs_attr_item *attr)
> {
> struct xfs_da_args *args = attr->xattri_da_args;
> diff --git a/fs/xfs/libxfs/xfs_attr.h b/fs/xfs/libxfs/xfs_attr.h
> index 18e157bf19cb..f4f78d841857 100644
> --- a/fs/xfs/libxfs/xfs_attr.h
> +++ b/fs/xfs/libxfs/xfs_attr.h
> @@ -451,21 +451,21 @@ enum xfs_delattr_state {
> XFS_DAS_RM_NAME, /* Remove attr name */
> XFS_DAS_RM_SHRINK, /* We are shrinking the tree
> */
>
> - /* Leaf state set sequence */
> + /* Leaf state set/replace sequence */
> XFS_DAS_LEAF_SET_RMT, /* set a remote xattr from a
> leaf */
> XFS_DAS_LEAF_ALLOC_RMT, /* We are allocating remote
> blocks */
> XFS_DAS_LEAF_REPLACE, /* Perform replace ops on a
> leaf */
> XFS_DAS_LEAF_REMOVE_OLD, /* Start removing old attr from leaf
> */
> XFS_DAS_LEAF_REMOVE_RMT, /* A rename is removing remote blocks
> */
> - XFS_DAS_RD_LEAF, /* Read in the new leaf */
> + XFS_DAS_LEAF_REMOVE_ATTR, /* Remove the old attr from a leaf */
>
> - /* Node state set sequence, must match leaf state above */
> + /* Node state set/replace sequence, must match leaf state above
> */
> XFS_DAS_NODE_SET_RMT, /* set a remote xattr from a
> node */
> XFS_DAS_NODE_ALLOC_RMT, /* We are allocating remote
> blocks */
> XFS_DAS_NODE_REPLACE, /* Perform replace ops on a
> node */
> XFS_DAS_NODE_REMOVE_OLD, /* Start removing old attr from node
> */
> XFS_DAS_NODE_REMOVE_RMT, /* A rename is removing remote blocks
> */
> - XFS_DAS_CLR_FLAG, /* Clear incomplete flag */
> + XFS_DAS_NODE_REMOVE_ATTR, /* Remove the old attr from a node */
>
> XFS_DAS_DONE, /* finished operation */
> };
> @@ -483,13 +483,13 @@ enum xfs_delattr_state {
> { XFS_DAS_LEAF_REPLACE, "XFS_DAS_LEAF_REPLACE" }, \
> { XFS_DAS_LEAF_REMOVE_OLD, "XFS_DAS_LEAF_REMOVE_OLD" },
> \
> { XFS_DAS_LEAF_REMOVE_RMT, "XFS_DAS_LEAF_REMOVE_RMT" },
> \
> - { XFS_DAS_RD_LEAF, "XFS_DAS_RD_LEAF" }, \
> + { XFS_DAS_LEAF_REMOVE_ATTR, "XFS_DAS_LEAF_REMOVE_ATTR" },
> \
> { XFS_DAS_NODE_SET_RMT, "XFS_DAS_NODE_SET_RMT" }, \
> { XFS_DAS_NODE_ALLOC_RMT, "XFS_DAS_NODE_ALLOC_RMT" }, \
> { XFS_DAS_NODE_REPLACE, "XFS_DAS_NODE_REPLACE" }, \
> { XFS_DAS_NODE_REMOVE_OLD, "XFS_DAS_NODE_REMOVE_OLD" },
> \
> { XFS_DAS_NODE_REMOVE_RMT, "XFS_DAS_NODE_REMOVE_RMT" },
> \
> - { XFS_DAS_CLR_FLAG, "XFS_DAS_CLR_FLAG" }, \
> + { XFS_DAS_NODE_REMOVE_ATTR, "XFS_DAS_NODE_REMOVE_ATTR" },
> \
> { XFS_DAS_DONE, "XFS_DAS_DONE" }
>
> /*
> diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h
> index 91852b9721e4..3a215d298e62 100644
> --- a/fs/xfs/xfs_trace.h
> +++ b/fs/xfs/xfs_trace.h
> @@ -4110,13 +4110,14 @@ TRACE_DEFINE_ENUM(XFS_DAS_LEAF_ALLOC_RMT);
> TRACE_DEFINE_ENUM(XFS_DAS_LEAF_REPLACE);
> TRACE_DEFINE_ENUM(XFS_DAS_LEAF_REMOVE_OLD);
> TRACE_DEFINE_ENUM(XFS_DAS_LEAF_REMOVE_RMT);
> -TRACE_DEFINE_ENUM(XFS_DAS_RD_LEAF);
> +TRACE_DEFINE_ENUM(XFS_DAS_LEAF_REMOVE_ATTR);
> TRACE_DEFINE_ENUM(XFS_DAS_NODE_SET_RMT);
> TRACE_DEFINE_ENUM(XFS_DAS_NODE_ALLOC_RMT);
> TRACE_DEFINE_ENUM(XFS_DAS_NODE_REPLACE);
> TRACE_DEFINE_ENUM(XFS_DAS_NODE_REMOVE_OLD);
> TRACE_DEFINE_ENUM(XFS_DAS_NODE_REMOVE_RMT);
> -TRACE_DEFINE_ENUM(XFS_DAS_CLR_FLAG);
> +TRACE_DEFINE_ENUM(XFS_DAS_NODE_REMOVE_ATTR);
> +TRACE_DEFINE_ENUM(XFS_DAS_DONE);
>
> DECLARE_EVENT_CLASS(xfs_das_state_class,
> TP_PROTO(int das, struct xfs_inode *ip),
