On Thu, Feb 18, 2021 at 09:53:35AM -0700, Allison Henderson wrote:
> This patch hoists xfs_attr_leaf_addname into the calling function. The
> goal being to get all the code that will require state management into
> the same scope. This isn't particuarly asetheic right away, but it is a
> preliminary step to to manageing the state machine code.
>
> Signed-off-by: Allison Henderson <allison.henderson@xxxxxxxxxx>
> ---
> fs/xfs/libxfs/xfs_attr.c | 209 ++++++++++++++++++++++-------------------------
> 1 file changed, 96 insertions(+), 113 deletions(-)
>
> diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
> index 19a532a..bfd4466 100644
> --- a/fs/xfs/libxfs/xfs_attr.c
> +++ b/fs/xfs/libxfs/xfs_attr.c
...
> @@ -286,10 +287,101 @@ xfs_attr_set_args(
...
> return error;
>
> + xfs_attr3_leaf_remove(bp, args);
> +
> + /*
> + * If the result is small enough, shrink it all into the inode.
> + */
> + 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;
> +node:
Hmm, I'm not a fan of this unconditional return followed by a jump label
in the middle of the function. It's a pretty clear indication that this
is just two functions smashed together, so I'm not sure what the
advantage of this is. I'll continue on to see what falls out of the next
patches..
Brian
> /*
> * Promote the attribute list to the Btree format.
> */
> @@ -731,115 +823,6 @@ xfs_attr_leaf_try_add(
> return retval;
> }
>
> -
> -/*
> - * 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(
> - struct xfs_da_args *args)
> -{
> - int error, forkoff;
> - struct xfs_buf *bp = NULL;
> - struct xfs_inode *dp = args->dp;
> -
> - trace_xfs_attr_leaf_addname(args);
> -
> - error = xfs_attr_leaf_try_add(args, bp);
> - if (error)
> - return error;
> -
> - /*
> - * Commit the transaction that added the attr name so that
> - * later routines can manage their own transactions.
> - */
> - error = xfs_trans_roll_inode(&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 (!(args->op_flags & XFS_DA_OP_RENAME)) {
> - /*
> - * Added a "remote" value, just clear the incomplete flag.
> - */
> - if (args->rmtblkno > 0)
> - error = xfs_attr3_leaf_clearflag(args);
> -
> - 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.
> - *
> - * In a separate transaction, set the incomplete flag on the "old" attr
> - * and clear the incomplete flag on the "new" attr.
> - */
> -
> - error = xfs_attr3_leaf_flipflags(args);
> - if (error)
> - return error;
> - /*
> - * Commit the flag value change and start the next trans in series.
> - */
> - error = xfs_trans_roll_inode(&args->trans, args->dp);
> - if (error)
> - return error;
> -
> - /*
> - * Dismantle the "old" attribute/value pair by removing a "remote" value
> - * (if it exists).
> - */
> - xfs_attr_restore_rmt_blk(args);
> -
> - if (args->rmtblkno) {
> - error = xfs_attr_rmtval_invalidate(args);
> - if (error)
> - return error;
> -
> - 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_attr3_leaf_read(args->trans, args->dp, args->blkno,
> - &bp);
> - if (error)
> - return error;
> -
> - xfs_attr3_leaf_remove(bp, args);
> -
> - /*
> - * If the result is small enough, shrink it all into the inode.
> - */
> - 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;
> -}
> -
> /*
> * Return EEXIST if attr is found, or ENOATTR if not
> */
> --
> 2.7.4
>
