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Date: Tue, 21 Aug 2018 09:22:04 -0400
From: Brian Foster <bfoster@redhat.com>
Subject: Re: [PATCH 04/10] xfs: convert mount flags to features
Message-ID: <20180821132203.GC15030@bfoster>
References: <20180820044851.414-1-david@fromorbit.com>
 <20180820044851.414-5-david@fromorbit.com>
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Sender: linux-xfs-owner@vger.kernel.org
List-ID: <linux-xfs.vger.kernel.org>
List-Id: xfs
To: Dave Chinner <david@fromorbit.com>
Cc: linux-xfs@vger.kernel.org

On Mon, Aug 20, 2018 at 02:48:45PM +1000, Dave Chinner wrote:
> From: Dave Chinner <dchinner@redhat.com>
> 
> Replace m_flags feature checks with xfs_has_<feature>() calls and
> rework the setup code to set flags in m_features.
> 
> Fallout is that there are some attr2/noattr2 changes - there's no
> longer separate feature flags for the attr2 superblock and attr2
> mount options - they both set the same flag. Hence we use the
> noattr2 feature to trigger turning off attr2 at mount time - it
> doesn't matter if it is the mount option or the sb feature that set
> it, specifying noattr2 will turn off attr2 for the current mount and
> clear it from the sb feature set.
> 
> [Discuss: Might be worth moving the attr2 changes into a separate
> patch so it's clear what changes are being made.]
> 

Yeah, a separate patch to condense the attr bits might be a good idea.
It also looks like some iosize feature changes crept in here that should
have been in a previous patch..?

Otherwise looks reasonable.

Brian

> Signed-off-by: Dave Chinner <dchinner@redhat.com>
> ---
>  fs/xfs/libxfs/xfs_attr.c      |   6 +-
>  fs/xfs/libxfs/xfs_attr_leaf.c |  36 +++++-----
>  fs/xfs/libxfs/xfs_bmap.c      |   4 +-
>  fs/xfs/libxfs/xfs_ialloc.c    |  10 ++-
>  fs/xfs/libxfs/xfs_inode_buf.c |   5 +-
>  fs/xfs/scrub/scrub.c          |   2 +-
>  fs/xfs/xfs_bmap_util.c        |   2 +-
>  fs/xfs/xfs_export.c           |   2 +-
>  fs/xfs/xfs_filestream.h       |   2 +-
>  fs/xfs/xfs_inode.c            |  10 +--
>  fs/xfs/xfs_inode.h            |   3 +-
>  fs/xfs/xfs_ioctl.c            |   2 +-
>  fs/xfs/xfs_iomap.c            |   6 +-
>  fs/xfs/xfs_iops.c             |   7 +-
>  fs/xfs/xfs_log.c              |  14 ++--
>  fs/xfs/xfs_log_cil.c          |   4 +-
>  fs/xfs/xfs_mount.c            |  43 +++++-------
>  fs/xfs/xfs_mount.h            |  52 +++++----------
>  fs/xfs/xfs_super.c            | 119 +++++++++++++++-------------------
>  fs/xfs/xfs_symlink.c          |   3 +-
>  20 files changed, 144 insertions(+), 188 deletions(-)
> 
> diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
> index 1e671d4eb6fa..5ca0233fe135 100644
> --- a/fs/xfs/libxfs/xfs_attr.c
> +++ b/fs/xfs/libxfs/xfs_attr.c
> @@ -294,7 +294,7 @@ xfs_attr_set(
>  			 * the transaction goes to disk before returning
>  			 * to the user.
>  			 */
> -			if (mp->m_flags & XFS_MOUNT_WSYNC)
> +			if (xfs_has_wsync(mp))
>  				xfs_trans_set_sync(args.trans);
>  
>  			if (!error && (flags & ATTR_KERNOTIME) == 0) {
> @@ -347,7 +347,7 @@ xfs_attr_set(
>  	 * 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)
> +	if (xfs_has_wsync(mp))
>  		xfs_trans_set_sync(args.trans);
>  
>  	if ((flags & ATTR_KERNOTIME) == 0)
> @@ -441,7 +441,7 @@ xfs_attr_remove(
>  	 * 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)
> +	if (xfs_has_wsync(mp))
>  		xfs_trans_set_sync(args.trans);
>  
>  	if ((flags & ATTR_KERNOTIME) == 0)
> diff --git a/fs/xfs/libxfs/xfs_attr_leaf.c b/fs/xfs/libxfs/xfs_attr_leaf.c
> index fbd53362b5bc..f9e536d6dd72 100644
> --- a/fs/xfs/libxfs/xfs_attr_leaf.c
> +++ b/fs/xfs/libxfs/xfs_attr_leaf.c
> @@ -448,7 +448,7 @@ xfs_attr_shortform_bytesfit(xfs_inode_t *dp, int bytes)
>  	 * literal area, but for the old format we are done if there is no
>  	 * space in the fixed attribute fork.
>  	 */
> -	if (!(mp->m_flags & XFS_MOUNT_ATTR2))
> +	if (!xfs_has_attr2(mp))
>  		return 0;
>  
>  	dsize = dp->i_df.if_bytes;
> @@ -502,21 +502,26 @@ xfs_attr_shortform_bytesfit(xfs_inode_t *dp, int bytes)
>  }
>  
>  /*
> - * Switch on the ATTR2 superblock bit (implies also FEATURES2)
> + * Switch on the ATTR2 superblock bit (implies also FEATURES2) by default unless
> + * we've explicitly been told not to use attr2 (i.e. noattr2 mount option).
>   */
>  STATIC void
>  xfs_sbversion_add_attr2(xfs_mount_t *mp, xfs_trans_t *tp)
>  {
> -	if ((mp->m_flags & XFS_MOUNT_ATTR2) &&
> -	    !(xfs_has_attr2(mp))) {
> -		spin_lock(&mp->m_sb_lock);
> -		if (!xfs_has_attr2(mp)) {
> -			xfs_feat_add_attr2(mp);
> -			spin_unlock(&mp->m_sb_lock);
> -			xfs_log_sb(tp);
> -		} else
> -			spin_unlock(&mp->m_sb_lock);
> +	if (xfs_has_attr2(mp))
> +		return;
> +	if (xfs_has_noattr2(mp))
> +		return;
> +
> +	spin_lock(&mp->m_sb_lock);
> +	if (xfs_has_attr2(mp)) {
> +		spin_unlock(&mp->m_sb_lock);
> +		return;
>  	}
> +
> +	xfs_feat_add_attr2(mp);
> +	spin_unlock(&mp->m_sb_lock);
> +	xfs_log_sb(tp);
>  }
>  
>  /*
> @@ -671,8 +676,7 @@ xfs_attr_shortform_remove(xfs_da_args_t *args)
>  	 * Fix up the start offset of the attribute fork
>  	 */
>  	totsize -= size;
> -	if (totsize == sizeof(xfs_attr_sf_hdr_t) &&
> -	    (mp->m_flags & XFS_MOUNT_ATTR2) &&
> +	if (totsize == sizeof(xfs_attr_sf_hdr_t) && xfs_has_attr2(mp) &&
>  	    (dp->i_d.di_format != XFS_DINODE_FMT_BTREE) &&
>  	    !(args->op_flags & XFS_DA_OP_ADDNAME)) {
>  		xfs_attr_fork_remove(dp, args->trans);
> @@ -682,7 +686,7 @@ xfs_attr_shortform_remove(xfs_da_args_t *args)
>  		ASSERT(dp->i_d.di_forkoff);
>  		ASSERT(totsize > sizeof(xfs_attr_sf_hdr_t) ||
>  				(args->op_flags & XFS_DA_OP_ADDNAME) ||
> -				!(mp->m_flags & XFS_MOUNT_ATTR2) ||
> +				!xfs_has_attr2(mp) ||
>  				dp->i_d.di_format == XFS_DINODE_FMT_BTREE);
>  		xfs_trans_log_inode(args->trans, dp,
>  					XFS_ILOG_CORE | XFS_ILOG_ADATA);
> @@ -888,7 +892,7 @@ xfs_attr_shortform_allfit(
>  				+ name_loc->namelen
>  				+ be16_to_cpu(name_loc->valuelen);
>  	}
> -	if ((dp->i_mount->m_flags & XFS_MOUNT_ATTR2) &&
> +	if (xfs_has_attr2(mp) &&
>  	    (dp->i_d.di_format != XFS_DINODE_FMT_BTREE) &&
>  	    (bytes == sizeof(struct xfs_attr_sf_hdr)))
>  		return -1;
> @@ -1011,7 +1015,7 @@ xfs_attr3_leaf_to_shortform(
>  		goto out;
>  
>  	if (forkoff == -1) {
> -		ASSERT(dp->i_mount->m_flags & XFS_MOUNT_ATTR2);
> +		ASSERT(xfs_has_attr2(dp->i_mount));
>  		ASSERT(dp->i_d.di_format != XFS_DINODE_FMT_BTREE);
>  		xfs_attr_fork_remove(dp, args->trans);
>  		goto out;
> diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c
> index 777630f3066a..459b08856f3f 100644
> --- a/fs/xfs/libxfs/xfs_bmap.c
> +++ b/fs/xfs/libxfs/xfs_bmap.c
> @@ -1079,7 +1079,7 @@ xfs_bmap_add_attrfork(
>  		ip->i_d.di_forkoff = xfs_attr_shortform_bytesfit(ip, size);
>  		if (!ip->i_d.di_forkoff)
>  			ip->i_d.di_forkoff = xfs_default_attroffset(ip) >> 3;
> -		else if (mp->m_flags & XFS_MOUNT_ATTR2)
> +		else if (!xfs_has_noattr2(mp))
>  			version = 2;
>  		break;
>  	default:
> @@ -3386,7 +3386,7 @@ xfs_bmap_btalloc(
>  
>  	/* stripe alignment for allocation is determined by mount parameters */
>  	stripe_align = 0;
> -	if (mp->m_swidth && (mp->m_flags & XFS_MOUNT_SWALLOC))
> +	if (mp->m_swidth && xfs_has_swalloc(mp))
>  		stripe_align = mp->m_swidth;
>  	else if (mp->m_dalign)
>  		stripe_align = mp->m_dalign;
> diff --git a/fs/xfs/libxfs/xfs_ialloc.c b/fs/xfs/libxfs/xfs_ialloc.c
> index 8d23491badb7..ffb1caf4c34a 100644
> --- a/fs/xfs/libxfs/xfs_ialloc.c
> +++ b/fs/xfs/libxfs/xfs_ialloc.c
> @@ -723,7 +723,7 @@ xfs_ialloc_ag_alloc(
>  		 */
>  		isaligned = 0;
>  		if (args.mp->m_sinoalign) {
> -			ASSERT(!(args.mp->m_flags & XFS_MOUNT_NOALIGN));
> +			ASSERT(!xfs_has_noalign(args.mp));
>  			args.alignment = args.mp->m_dalign;
>  			isaligned = 1;
>  		} else
> @@ -1974,8 +1974,7 @@ xfs_difree_inobt(
>  	 * remove the chunk if the block size is large enough for multiple inode
>  	 * chunks (that might not be free).
>  	 */
> -	if (!(mp->m_flags & XFS_MOUNT_IKEEP) &&
> -	    rec.ir_free == XFS_INOBT_ALL_FREE &&
> +	if (!xfs_has_ikeep(mp) && rec.ir_free == XFS_INOBT_ALL_FREE &&
>  	    mp->m_sb.sb_inopblock <= XFS_INODES_PER_CHUNK) {
>  		xic->deleted = true;
>  		xic->first_ino = XFS_AGINO_TO_INO(mp, agno, rec.ir_startino);
> @@ -2112,9 +2111,8 @@ xfs_difree_finobt(
>  	 * enough for multiple chunks. Leave the finobt record to remain in sync
>  	 * with the inobt.
>  	 */
> -	if (rec.ir_free == XFS_INOBT_ALL_FREE &&
> -	    mp->m_sb.sb_inopblock <= XFS_INODES_PER_CHUNK &&
> -	    !(mp->m_flags & XFS_MOUNT_IKEEP)) {
> +	if (!xfs_has_ikeep(mp) && rec.ir_free == XFS_INOBT_ALL_FREE &&
> +	    mp->m_sb.sb_inopblock <= XFS_INODES_PER_CHUNK) {
>  		error = xfs_btree_delete(cur, &i);
>  		if (error)
>  			goto error;
> diff --git a/fs/xfs/libxfs/xfs_inode_buf.c b/fs/xfs/libxfs/xfs_inode_buf.c
> index 6eb9f967d087..1d5389ad6502 100644
> --- a/fs/xfs/libxfs/xfs_inode_buf.c
> +++ b/fs/xfs/libxfs/xfs_inode_buf.c
> @@ -573,7 +573,7 @@ xfs_dinode_calc_crc(
>   * Read the disk inode attributes into the in-core inode structure.
>   *
>   * For version 5 superblocks, if we are initialising a new inode and we are not
> - * utilising the XFS_MOUNT_IKEEP inode cluster mode, we can simple build the new
> + * utilising the XFS_FEAT_IKEEP inode cluster mode, we can simple build the new
>   * inode core with a random generation number. If we are keeping inodes around,
>   * we need to read the inode cluster to get the existing generation number off
>   * disk. Further, if we are using version 4 superblocks (i.e. v1/v2 inode
> @@ -602,8 +602,7 @@ xfs_iread(
>  
>  	/* shortcut IO on inode allocation if possible */
>  	if ((iget_flags & XFS_IGET_CREATE) &&
> -	    xfs_has_crc(mp) &&
> -	    !(mp->m_flags & XFS_MOUNT_IKEEP)) {
> +	    xfs_has_crc(mp) && !xfs_has_ikeep(mp)) {
>  		/* initialise the on-disk inode core */
>  		memset(&ip->i_d, 0, sizeof(ip->i_d));
>  		VFS_I(ip)->i_generation = prandom_u32();
> diff --git a/fs/xfs/scrub/scrub.c b/fs/xfs/scrub/scrub.c
> index 4c486e89829d..a3698e9b084a 100644
> --- a/fs/xfs/scrub/scrub.c
> +++ b/fs/xfs/scrub/scrub.c
> @@ -495,7 +495,7 @@ xfs_scrub_metadata(
>  	if (XFS_FORCED_SHUTDOWN(mp))
>  		goto out;
>  	error = -ENOTRECOVERABLE;
> -	if (mp->m_flags & XFS_MOUNT_NORECOVERY)
> +	if (xfs_has_norecovery(mp))
>  		goto out;
>  
>  	error = xchk_validate_inputs(mp, sm);
> diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c
> index 2647e4ef8dc5..bd733b256fee 100644
> --- a/fs/xfs/xfs_bmap_util.c
> +++ b/fs/xfs/xfs_bmap_util.c
> @@ -1978,7 +1978,7 @@ xfs_swap_extents(
>  	 * 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)
> +	if (xfs_has_wsync(mp))
>  		xfs_trans_set_sync(tp);
>  
>  	error = xfs_trans_commit(tp);
> diff --git a/fs/xfs/xfs_export.c b/fs/xfs/xfs_export.c
> index f2284ceb129f..cc1f7d09102f 100644
> --- a/fs/xfs/xfs_export.c
> +++ b/fs/xfs/xfs_export.c
> @@ -66,7 +66,7 @@ xfs_fs_encode_fh(
>  	 * large enough filesystem may contain them, thus the slightly
>  	 * confusing looking conditional below.
>  	 */
> -	if (!(XFS_M(inode->i_sb)->m_flags & XFS_MOUNT_SMALL_INUMS) ||
> +	if (!xfs_has_small_inums(XFS_M(inode->i_sb)) ||
>  	    (XFS_M(inode->i_sb)->m_flags & XFS_MOUNT_32BITINODES))
>  		fileid_type |= XFS_FILEID_TYPE_64FLAG;
>  
> diff --git a/fs/xfs/xfs_filestream.h b/fs/xfs/xfs_filestream.h
> index 5cc7665e93c9..c8760fffdda7 100644
> --- a/fs/xfs/xfs_filestream.h
> +++ b/fs/xfs/xfs_filestream.h
> @@ -21,7 +21,7 @@ static inline int
>  xfs_inode_is_filestream(
>  	struct xfs_inode	*ip)
>  {
> -	return (ip->i_mount->m_flags & XFS_MOUNT_FILESTREAMS) ||
> +	return xfs_has_filestreams(ip->i_mount) ||
>  		(ip->i_d.di_flags & XFS_DIFLAG_FILESTREAM);
>  }
>  
> diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
> index d957a46dc1cb..0f67ca516c87 100644
> --- a/fs/xfs/xfs_inode.c
> +++ b/fs/xfs/xfs_inode.c
> @@ -1245,7 +1245,7 @@ xfs_create(
>  	 * create transaction goes to disk before returning to
>  	 * the user.
>  	 */
> -	if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC))
> +	if (xfs_has_wsync(mp) || xfs_has_dirsync(mp))
>  		xfs_trans_set_sync(tp);
>  
>  	/*
> @@ -1336,7 +1336,7 @@ xfs_create_tmpfile(
>  	if (error)
>  		goto out_trans_cancel;
>  
> -	if (mp->m_flags & XFS_MOUNT_WSYNC)
> +	if (xfs_has_wsync(mp))
>  		xfs_trans_set_sync(tp);
>  
>  	/*
> @@ -1463,7 +1463,7 @@ xfs_link(
>  	 * link transaction goes to disk before returning to
>  	 * the user.
>  	 */
> -	if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC))
> +	if (xfs_has_wsync(mp) || xfs_has_dirsync(mp))
>  		xfs_trans_set_sync(tp);
>  
>  	return xfs_trans_commit(tp);
> @@ -2627,7 +2627,7 @@ xfs_remove(
>  	 * remove transaction goes to disk before returning to
>  	 * the user.
>  	 */
> -	if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC))
> +	if (xfs_has_wsync(mp) || xfs_has_dirsync(mp))
>  		xfs_trans_set_sync(tp);
>  
>  	error = xfs_trans_commit(tp);
> @@ -2704,7 +2704,7 @@ xfs_finish_rename(
>  	 * If this is a synchronous mount, make sure that the rename transaction
>  	 * goes to disk before returning to the user.
>  	 */
> -	if (tp->t_mountp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC))
> +	if (xfs_has_wsync(tp->t_mountp) || xfs_has_dirsync(tp->t_mountp))
>  		xfs_trans_set_sync(tp);
>  
>  	return xfs_trans_commit(tp);
> diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h
> index be2014520155..40bc71d49220 100644
> --- a/fs/xfs/xfs_inode.h
> +++ b/fs/xfs/xfs_inode.h
> @@ -394,8 +394,7 @@ enum layout_break_reason {
>   * new subdirectory gets S_ISGID bit from parent.
>   */
>  #define XFS_INHERIT_GID(pip)	\
> -	(((pip)->i_mount->m_flags & XFS_MOUNT_GRPID) || \
> -	 (VFS_I(pip)->i_mode & S_ISGID))
> +	(xfs_has_grpid((pip)->i_mount) || (VFS_I(pip)->i_mode & S_ISGID))
>  
>  int		xfs_release(struct xfs_inode *ip);
>  void		xfs_inactive(struct xfs_inode *ip);
> diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
> index 4f4c6cd81b54..350b9276e6fe 100644
> --- a/fs/xfs/xfs_ioctl.c
> +++ b/fs/xfs/xfs_ioctl.c
> @@ -1167,7 +1167,7 @@ xfs_ioctl_setattr_get_trans(
>  		goto out_cancel;
>  	}
>  
> -	if (mp->m_flags & XFS_MOUNT_WSYNC)
> +	if (xfs_has_wsync(mp))
>  		xfs_trans_set_sync(tp);
>  
>  	return tp;
> diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c
> index 6320aca39f39..3c999ea64021 100644
> --- a/fs/xfs/xfs_iomap.c
> +++ b/fs/xfs/xfs_iomap.c
> @@ -79,7 +79,7 @@ xfs_eof_alignment(
>  		 * If mounted with the "-o swalloc" option the alignment is
>  		 * increased from the strip unit size to the stripe width.
>  		 */
> -		if (mp->m_swidth && (mp->m_flags & XFS_MOUNT_SWALLOC))
> +		if (mp->m_swidth && xfs_has_swalloc(mp))
>  			align = mp->m_swidth;
>  		else if (mp->m_dalign)
>  			align = mp->m_dalign;
> @@ -385,7 +385,7 @@ xfs_iomap_prealloc_size(
>  	if (offset + count <= XFS_ISIZE(ip))
>  		return 0;
>  
> -	if (!(mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) &&
> +	if (!xfs_has_iosize(mp) &&
>  	    (XFS_ISIZE(ip) < XFS_FSB_TO_B(mp, mp->m_writeio_blocks)))
>  		return 0;
>  
> @@ -393,7 +393,7 @@ xfs_iomap_prealloc_size(
>  	 * If an explicit allocsize is set, the file is small, or we
>  	 * are writing behind a hole, then use the minimum prealloc:
>  	 */
> -	if ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ||
> +	if (xfs_has_iosize(mp) ||
>  	    XFS_ISIZE(ip) < XFS_FSB_TO_B(mp, mp->m_dalign) ||
>  	    !xfs_iext_peek_prev_extent(ifp, icur, &prev) ||
>  	    prev.br_startoff + prev.br_blockcount < offset_fsb)
> diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
> index 066a97d108f5..0241471916d9 100644
> --- a/fs/xfs/xfs_iops.c
> +++ b/fs/xfs/xfs_iops.c
> @@ -742,7 +742,7 @@ xfs_setattr_nonsize(
>  
>  	XFS_STATS_INC(mp, xs_ig_attrchg);
>  
> -	if (mp->m_flags & XFS_MOUNT_WSYNC)
> +	if (xfs_has_wsync(mp))
>  		xfs_trans_set_sync(tp);
>  	error = xfs_trans_commit(tp);
>  
> @@ -980,7 +980,7 @@ xfs_setattr_size(
>  
>  	XFS_STATS_INC(mp, xs_ig_attrchg);
>  
> -	if (mp->m_flags & XFS_MOUNT_WSYNC)
> +	if (xfs_has_wsync(mp))
>  		xfs_trans_set_sync(tp);
>  
>  	error = xfs_trans_commit(tp);
> @@ -1200,8 +1200,7 @@ xfs_inode_supports_dax(
>  		return false;
>  
>  	/* DAX mount option or DAX iflag must be set. */
> -	if (!(mp->m_flags & XFS_MOUNT_DAX) &&
> -	    !(ip->i_d.di_flags2 & XFS_DIFLAG2_DAX))
> +	if (!xfs_has_dax(mp) && !(ip->i_d.di_flags2 & XFS_DIFLAG2_DAX))
>  		return false;
>  
>  	/* Block size must match page size */
> diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
> index 7ad8c7bb1345..bcc068dee92a 100644
> --- a/fs/xfs/xfs_log.c
> +++ b/fs/xfs/xfs_log.c
> @@ -600,7 +600,7 @@ xfs_log_mount(
>  	int		error = 0;
>  	int		min_logfsbs;
>  
> -	if (!(mp->m_flags & XFS_MOUNT_NORECOVERY)) {
> +	if (!xfs_has_norecovery(mp)) {
>  		xfs_notice(mp, "Mounting V%d Filesystem",
>  			   XFS_SB_VERSION_NUM(&mp->m_sb));
>  	} else {
> @@ -685,8 +685,8 @@ xfs_log_mount(
>  	 * skip log recovery on a norecovery mount.  pretend it all
>  	 * just worked.
>  	 */
> -	if (!(mp->m_flags & XFS_MOUNT_NORECOVERY)) {
> -		int	readonly = (mp->m_flags & XFS_MOUNT_RDONLY);
> +	if (!xfs_has_norecovery(mp)) {
> +		bool	readonly = (mp->m_flags & XFS_MOUNT_RDONLY);
>  
>  		if (readonly)
>  			mp->m_flags &= ~XFS_MOUNT_RDONLY;
> @@ -746,8 +746,8 @@ xfs_log_mount_finish(
>  	bool	readonly = (mp->m_flags & XFS_MOUNT_RDONLY);
>  	bool	recovered = mp->m_log->l_flags & XLOG_RECOVERY_NEEDED;
>  
> -	if (mp->m_flags & XFS_MOUNT_NORECOVERY) {
> -		ASSERT(mp->m_flags & XFS_MOUNT_RDONLY);
> +	if (xfs_has_norecovery(mp)) {
> +		ASSERT(readonly);
>  		return 0;
>  	} else if (readonly) {
>  		/* Allow unlinked processing to proceed */
> @@ -930,7 +930,7 @@ xfs_log_unmount_write(xfs_mount_t *mp)
>  	 * Don't write out unmount record on norecovery mounts or ro devices.
>  	 * Or, if we are doing a forced umount (typically because of IO errors).
>  	 */
> -	if (mp->m_flags & XFS_MOUNT_NORECOVERY ||
> +	if (xfs_has_norecovery(mp) ||
>  	    xfs_readonly_buftarg(log->l_mp->m_logdev_targp)) {
>  		ASSERT(mp->m_flags & XFS_MOUNT_RDONLY);
>  		return 0;
> @@ -4079,7 +4079,7 @@ xfs_log_check_lsn(
>  	 * resets the in-core LSN. We can't validate in this mode, but
>  	 * modifications are not allowed anyways so just return true.
>  	 */
> -	if (mp->m_flags & XFS_MOUNT_NORECOVERY)
> +	if (xfs_has_norecovery(mp))
>  		return true;
>  
>  	/*
> diff --git a/fs/xfs/xfs_log_cil.c b/fs/xfs/xfs_log_cil.c
> index d3884e08b43c..c4f71e600f00 100644
> --- a/fs/xfs/xfs_log_cil.c
> +++ b/fs/xfs/xfs_log_cil.c
> @@ -538,7 +538,7 @@ xlog_discard_busy_extents(
>  	struct blk_plug		plug;
>  	int			error = 0;
>  
> -	ASSERT(mp->m_flags & XFS_MOUNT_DISCARD);
> +	ASSERT(xfs_has_discard(mp));
>  
>  	blk_start_plug(&plug);
>  	list_for_each_entry(busyp, list, list) {
> @@ -587,7 +587,7 @@ xlog_cil_committed(
>  
>  	xfs_extent_busy_sort(&ctx->busy_extents);
>  	xfs_extent_busy_clear(mp, &ctx->busy_extents,
> -			     (mp->m_flags & XFS_MOUNT_DISCARD) && !abort);
> +			      xfs_has_discard(mp) && !abort);
>  
>  	/*
>  	 * If we are aborting the commit, wake up anyone waiting on the
> diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
> index 212ae2695b88..624387661cbc 100644
> --- a/fs/xfs/xfs_mount.c
> +++ b/fs/xfs/xfs_mount.c
> @@ -64,7 +64,7 @@ xfs_uuid_mount(
>  	/* Publish UUID in struct super_block */
>  	uuid_copy(&mp->m_super->s_uuid, uuid);
>  
> -	if (mp->m_flags & XFS_MOUNT_NOUUID)
> +	if (xfs_has_nouuid(mp))
>  		return 0;
>  
>  	if (uuid_is_null(uuid)) {
> @@ -106,7 +106,7 @@ xfs_uuid_unmount(
>  	uuid_t			*uuid = &mp->m_sb.sb_uuid;
>  	int			i;
>  
> -	if (mp->m_flags & XFS_MOUNT_NOUUID)
> +	if (xfs_has_nouuid(mp))
>  		return;
>  
>  	mutex_lock(&xfs_uuid_table_mutex);
> @@ -414,8 +414,7 @@ xfs_update_alignment(xfs_mount_t *mp)
>  	"cannot change alignment: superblock does not support data alignment");
>  			return -EINVAL;
>  		}
> -	} else if ((mp->m_flags & XFS_MOUNT_NOALIGN) != XFS_MOUNT_NOALIGN &&
> -		    xfs_has_dalign(mp)) {
> +	} else if (xfs_has_dalign(mp) && !xfs_has_noalign(mp)) {
>  			mp->m_dalign = sbp->sb_unit;
>  			mp->m_swidth = sbp->sb_width;
>  	}
> @@ -454,22 +453,21 @@ xfs_set_maxicount(xfs_mount_t *mp)
>   * is being used for NFS service (wsync mount option).
>   */
>  STATIC void
> -xfs_set_rw_sizes(xfs_mount_t *mp)
> +xfs_set_rw_sizes(
> +	struct xfs_mount *mp)
>  {
> -	xfs_sb_t	*sbp = &(mp->m_sb);
> +	struct xfs_sb	*sbp = &mp->m_sb;
>  	int		readio_log, writeio_log;
>  
> -	if (!(mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)) {
> -		if (mp->m_flags & XFS_MOUNT_WSYNC) {
> -			readio_log = XFS_WSYNC_READIO_LOG;
> -			writeio_log = XFS_WSYNC_WRITEIO_LOG;
> -		} else {
> -			readio_log = XFS_READIO_LOG_LARGE;
> -			writeio_log = XFS_WRITEIO_LOG_LARGE;
> -		}
> -	} else {
> +	if (xfs_has_iosize(mp)) {
>  		readio_log = mp->m_readio_log;
>  		writeio_log = mp->m_writeio_log;
> +	} else if (xfs_has_wsync(mp)) {
> +		readio_log = XFS_WSYNC_READIO_LOG;
> +		writeio_log = XFS_WSYNC_WRITEIO_LOG;
> +	} else {
> +		readio_log = XFS_READIO_LOG_LARGE;
> +		writeio_log = XFS_WRITEIO_LOG_LARGE;
>  	}
>  
>  	if (sbp->sb_blocklog > readio_log) {
> @@ -704,18 +702,9 @@ xfs_mountfs(
>  		xfs_warn(mp, "correcting sb_features alignment problem");
>  		sbp->sb_features2 |= sbp->sb_bad_features2;
>  		mp->m_update_sb = true;
> -
> -		/*
> -		 * Re-check for ATTR2 in case it was found in bad_features2
> -		 * slot.
> -		 */
> -		if (xfs_has_attr2(mp) &&
> -		   !(mp->m_flags & XFS_MOUNT_NOATTR2))
> -			mp->m_flags |= XFS_MOUNT_ATTR2;
>  	}
>  
> -	if (xfs_has_attr2(mp) &&
> -	   (mp->m_flags & XFS_MOUNT_NOATTR2)) {
> +	if (xfs_has_attr2(mp) && xfs_has_noattr2(mp)) {
>  		xfs_feat_remove_attr2(mp);
>  		mp->m_update_sb = true;
>  
> @@ -988,10 +977,8 @@ xfs_mountfs(
>  	 * We use the same quiesce mechanism as the rw->ro remount, as they are
>  	 * semantically identical operations.
>  	 */
> -	if ((mp->m_flags & (XFS_MOUNT_RDONLY|XFS_MOUNT_NORECOVERY)) ==
> -							XFS_MOUNT_RDONLY) {
> +	if ((mp->m_flags & XFS_MOUNT_RDONLY) && !xfs_has_norecovery(mp))
>  		xfs_quiesce_attr(mp);
> -	}
>  
>  	/*
>  	 * Complete the quota initialisation, post-log-replay component.
> diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
> index 74a128fe316b..fee11d015b5a 100644
> --- a/fs/xfs/xfs_mount.h
> +++ b/fs/xfs/xfs_mount.h
> @@ -228,17 +228,19 @@ typedef struct xfs_mount {
>  #define XFS_FEAT_WSYNC		(1ULL << 22)	/* synchronous metadata ops */
>  #define XFS_FEAT_DIRSYNC	(1ULL << 23)	/* synchronous directory ops */
>  #define XFS_FEAT_DISCARD	(1ULL << 24)	/* discard unused blocks */
> -#define XFS_FEAT_GRPID		(1ULL << 25)	/* group-ID assigned from directory */
> +#define XFS_FEAT_GRPID		(1ULL << 25)	/* GID assigned from directory */
>  #define XFS_FEAT_SMALL_INUMS	(1ULL << 26)	/* user wants 32bit inodes */
>  #define XFS_FEAT_IKEEP		(1ULL << 27)	/* keep empty inode clusters*/
>  #define XFS_FEAT_SWALLOC	(1ULL << 28)	/* stripe width allocation */
> -#define XFS_FEAT_FILESTREAMS	(1ULL << 29)	/* enable the filestreams
> -						   allocator */
> +#define XFS_FEAT_FILESTREAMS	(1ULL << 29)	/* use filestreams allocator */
>  #define XFS_FEAT_DAX		(1ULL << 30)	/* TEST ONLY! */
> -#define XFS_FEAT_COMPAT_IOSIZE	(1ULL << 31)	/* don't report large preferred
> +#define XFS_FEAT_IOSIZE		(1ULL << 31)	/* user specified iosize */
> +#define XFS_FEAT_COMPAT_IOSIZE	(1ULL << 32)	/* don't report large preferred
>  						 * I/O size in stat() */
> -#define XFS_FEAT_NORECOVERY	(1ULL << 32)	/* no recovery - dirty fs */
> -#define XFS_FEAT_NOUUID		(1ULL << 33)	/* ignore uuid during mount */
> +#define XFS_FEAT_NORECOVERY	(1ULL << 33)	/* no recovery - dirty fs */
> +#define XFS_FEAT_NOUUID		(1ULL << 34)	/* ignore uuid during mount */
> +#define XFS_FEAT_NOATTR2	(1ULL << 35)	/* disable attr2 completely */
> +#define XFS_FEAT_NOALIGN	(1ULL << 36)	/* ignore alignment */
>  
>  #define __XFS_HAS_FEAT(name, NAME) \
>  static inline bool xfs_has_ ## name (struct xfs_mount *mp) \
> @@ -306,44 +308,24 @@ __XFS_HAS_FEAT(ikeep, IKEEP)
>  __XFS_HAS_FEAT(swalloc, SWALLOC)
>  __XFS_HAS_FEAT(filestreams, FILESTREAMS)
>  __XFS_HAS_FEAT(dax, DAX)
> +__XFS_HAS_FEAT(iosize, IOSIZE)
>  __XFS_HAS_FEAT(compat_iosize, COMPAT_IOSIZE)
>  __XFS_HAS_FEAT(norecovery, NORECOVERY)
>  __XFS_HAS_FEAT(nouuid, NOUUID)
> +__XFS_HAS_FEAT(noattr2, NOATTR2)
> +__XFS_HAS_FEAT(noalign, NOALIGN)
>  
>  /*
>   * Flags for m_flags.
>   */
> -#define XFS_MOUNT_WSYNC		(1ULL << 0)	/* for nfs - all metadata ops
> -						   must be synchronous except
> -						   for space allocations */
>  #define XFS_MOUNT_UNMOUNTING	(1ULL << 1)	/* filesystem is unmounting */
>  #define XFS_MOUNT_BAD_SUMMARY	(1ULL << 2)	/* summary counters are bad */
>  #define XFS_MOUNT_WAS_CLEAN	(1ULL << 3)
>  #define XFS_MOUNT_FS_SHUTDOWN	(1ULL << 4)	/* atomic stop of all filesystem
>  						   operations, typically for
>  						   disk errors in metadata */
> -#define XFS_MOUNT_DISCARD	(1ULL << 5)	/* discard unused blocks */
> -#define XFS_MOUNT_NOALIGN	(1ULL << 7)	/* turn off stripe alignment
> -						   allocations */
> -#define XFS_MOUNT_ATTR2		(1ULL << 8)	/* allow use of attr2 format */
> -#define XFS_MOUNT_GRPID		(1ULL << 9)	/* group-ID assigned from directory */
> -#define XFS_MOUNT_NORECOVERY	(1ULL << 10)	/* no recovery - dirty fs */
> -#define XFS_MOUNT_DFLT_IOSIZE	(1ULL << 12)	/* set default i/o size */
> -#define XFS_MOUNT_SMALL_INUMS	(1ULL << 14)	/* user wants 32bit inodes */
>  #define XFS_MOUNT_32BITINODES	(1ULL << 15)	/* inode32 allocator active */
> -#define XFS_MOUNT_NOUUID	(1ULL << 16)	/* ignore uuid during mount */
> -#define XFS_MOUNT_IKEEP		(1ULL << 18)	/* keep empty inode clusters*/
> -#define XFS_MOUNT_SWALLOC	(1ULL << 19)	/* turn on stripe width
> -						 * allocation */
>  #define XFS_MOUNT_RDONLY	(1ULL << 20)	/* read-only fs */
> -#define XFS_MOUNT_DIRSYNC	(1ULL << 21)	/* synchronous directory ops */
> -#define XFS_MOUNT_COMPAT_IOSIZE	(1ULL << 22)	/* don't report large preferred
> -						 * I/O size in stat() */
> -#define XFS_MOUNT_FILESTREAMS	(1ULL << 24)	/* enable the filestreams
> -						   allocator */
> -#define XFS_MOUNT_NOATTR2	(1ULL << 25)	/* disable use of attr2 format */
> -
> -#define XFS_MOUNT_DAX		(1ULL << 62)	/* TEST ONLY! */
>  
>  
>  /*
> @@ -381,13 +363,13 @@ __XFS_HAS_FEAT(nouuid, NOUUID)
>  static inline unsigned long
>  xfs_preferred_iosize(xfs_mount_t *mp)
>  {
> -	if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE)
> +	if (xfs_has_compat_iosize(mp))
>  		return PAGE_SIZE;
> -	return (mp->m_swidth ?
> -		(mp->m_swidth << mp->m_sb.sb_blocklog) :
> -		((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ?
> -			(1 << (int)max(mp->m_readio_log, mp->m_writeio_log)) :
> -			PAGE_SIZE));
> +	if (mp->m_swidth)
> +		return mp->m_swidth << mp->m_sb.sb_blocklog;
> +	if (xfs_has_iosize(mp))
> +		return 1 << (int)max(mp->m_readio_log, mp->m_writeio_log);
> +	return PAGE_SIZE;
>  }
>  
>  #define XFS_LAST_UNMOUNT_WAS_CLEAN(mp)	\
> diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
> index cf76884c2a95..d3dff878be99 100644
> --- a/fs/xfs/xfs_super.c
> +++ b/fs/xfs/xfs_super.c
> @@ -193,15 +193,15 @@ xfs_parseargs(
>  	if (sb_rdonly(sb))
>  		mp->m_flags |= XFS_MOUNT_RDONLY;
>  	if (sb->s_flags & SB_DIRSYNC)
> -		mp->m_flags |= XFS_MOUNT_DIRSYNC;
> +		mp->m_features |= XFS_FEAT_DIRSYNC;
>  	if (sb->s_flags & SB_SYNCHRONOUS)
> -		mp->m_flags |= XFS_MOUNT_WSYNC;
> +		mp->m_features |= XFS_FEAT_WSYNC;
>  
>  	/*
>  	 * Set some default flags that could be cleared by the mount option
>  	 * parsing.
>  	 */
> -	mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
> +	mp->m_features |= XFS_FEAT_COMPAT_IOSIZE;
>  
>  	/*
>  	 * These can be overridden by the mount option parsing.
> @@ -251,23 +251,23 @@ xfs_parseargs(
>  			break;
>  		case Opt_grpid:
>  		case Opt_bsdgroups:
> -			mp->m_flags |= XFS_MOUNT_GRPID;
> +			mp->m_features |= XFS_FEAT_GRPID;
>  			break;
>  		case Opt_nogrpid:
>  		case Opt_sysvgroups:
> -			mp->m_flags &= ~XFS_MOUNT_GRPID;
> +			mp->m_features &= ~XFS_FEAT_GRPID;
>  			break;
>  		case Opt_wsync:
> -			mp->m_flags |= XFS_MOUNT_WSYNC;
> +			mp->m_features |= XFS_FEAT_WSYNC;
>  			break;
>  		case Opt_norecovery:
> -			mp->m_flags |= XFS_MOUNT_NORECOVERY;
> +			mp->m_features |= XFS_FEAT_NORECOVERY;
>  			break;
>  		case Opt_noalign:
> -			mp->m_flags |= XFS_MOUNT_NOALIGN;
> +			mp->m_features |= XFS_FEAT_NOALIGN;
>  			break;
>  		case Opt_swalloc:
> -			mp->m_flags |= XFS_MOUNT_SWALLOC;
> +			mp->m_features |= XFS_FEAT_SWALLOC;
>  			break;
>  		case Opt_sunit:
>  			if (match_int(args, &dsunit))
> @@ -278,35 +278,34 @@ xfs_parseargs(
>  				return -EINVAL;
>  			break;
>  		case Opt_inode32:
> -			mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
> +			mp->m_features |= XFS_FEAT_SMALL_INUMS;
>  			break;
>  		case Opt_inode64:
> -			mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
> +			mp->m_features &= ~XFS_FEAT_SMALL_INUMS;
>  			break;
>  		case Opt_nouuid:
> -			mp->m_flags |= XFS_MOUNT_NOUUID;
> +			mp->m_features |= XFS_FEAT_NOUUID;
>  			break;
>  		case Opt_ikeep:
> -			mp->m_flags |= XFS_MOUNT_IKEEP;
> +			mp->m_features |= XFS_FEAT_IKEEP;
>  			break;
>  		case Opt_noikeep:
> -			mp->m_flags &= ~XFS_MOUNT_IKEEP;
> +			mp->m_features &= ~XFS_FEAT_IKEEP;
>  			break;
>  		case Opt_largeio:
> -			mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE;
> +			mp->m_features &= ~XFS_FEAT_COMPAT_IOSIZE;
>  			break;
>  		case Opt_nolargeio:
> -			mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
> +			mp->m_features |= XFS_FEAT_COMPAT_IOSIZE;
>  			break;
>  		case Opt_attr2:
> -			mp->m_flags |= XFS_MOUNT_ATTR2;
> +			mp->m_features |= XFS_FEAT_ATTR2;
>  			break;
>  		case Opt_noattr2:
> -			mp->m_flags &= ~XFS_MOUNT_ATTR2;
> -			mp->m_flags |= XFS_MOUNT_NOATTR2;
> +			mp->m_features |= XFS_FEAT_NOATTR2;
>  			break;
>  		case Opt_filestreams:
> -			mp->m_flags |= XFS_MOUNT_FILESTREAMS;
> +			mp->m_features |= XFS_FEAT_FILESTREAMS;
>  			break;
>  		case Opt_noquota:
>  			mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT;
> @@ -343,14 +342,14 @@ xfs_parseargs(
>  			mp->m_qflags &= ~XFS_GQUOTA_ENFD;
>  			break;
>  		case Opt_discard:
> -			mp->m_flags |= XFS_MOUNT_DISCARD;
> +			mp->m_features |= XFS_FEAT_DISCARD;
>  			break;
>  		case Opt_nodiscard:
> -			mp->m_flags &= ~XFS_MOUNT_DISCARD;
> +			mp->m_features &= ~XFS_FEAT_DISCARD;
>  			break;
>  #ifdef CONFIG_FS_DAX
>  		case Opt_dax:
> -			mp->m_flags |= XFS_MOUNT_DAX;
> +			mp->m_features |= XFS_FEAT_DAX;
>  			break;
>  #endif
>  		default:
> @@ -362,13 +361,12 @@ xfs_parseargs(
>  	/*
>  	 * no recovery flag requires a read-only mount
>  	 */
> -	if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
> -	    !(mp->m_flags & XFS_MOUNT_RDONLY)) {
> +	if (xfs_has_norecovery(mp) && !(mp->m_flags & XFS_MOUNT_RDONLY)) {
>  		xfs_warn(mp, "no-recovery mounts must be read-only.");
>  		return -EINVAL;
>  	}
>  
> -	if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) {
> +	if (xfs_has_noalign(mp) && (dsunit || dswidth)) {
>  		xfs_warn(mp,
>  	"sunit and swidth options incompatible with the noalign option");
>  		return -EINVAL;
> @@ -394,7 +392,7 @@ xfs_parseargs(
>  	}
>  
>  done:
> -	if (dsunit && !(mp->m_flags & XFS_MOUNT_NOALIGN)) {
> +	if (dsunit && !xfs_has_noalign(mp)) {
>  		/*
>  		 * At this point the superblock has not been read
>  		 * in, therefore we do not know the block size.
> @@ -433,7 +431,7 @@ xfs_parseargs(
>  			return -EINVAL;
>  		}
>  
> -		mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
> +		mp->m_features |= XFS_FEAT_IOSIZE;
>  		mp->m_readio_log = iosizelog;
>  		mp->m_writeio_log = iosizelog;
>  	}
> @@ -453,38 +451,38 @@ xfs_showargs(
>  {
>  	static struct proc_xfs_info xfs_info_set[] = {
>  		/* the few simple ones we can get from the mount struct */
> -		{ XFS_MOUNT_IKEEP,		",ikeep" },
> -		{ XFS_MOUNT_WSYNC,		",wsync" },
> -		{ XFS_MOUNT_NOALIGN,		",noalign" },
> -		{ XFS_MOUNT_SWALLOC,		",swalloc" },
> -		{ XFS_MOUNT_NOUUID,		",nouuid" },
> -		{ XFS_MOUNT_NORECOVERY,		",norecovery" },
> -		{ XFS_MOUNT_ATTR2,		",attr2" },
> -		{ XFS_MOUNT_FILESTREAMS,	",filestreams" },
> -		{ XFS_MOUNT_GRPID,		",grpid" },
> -		{ XFS_MOUNT_DISCARD,		",discard" },
> -		{ XFS_MOUNT_SMALL_INUMS,	",inode32" },
> -		{ XFS_MOUNT_DAX,		",dax" },
> +		{ XFS_FEAT_IKEEP,	",ikeep" },
> +		{ XFS_FEAT_WSYNC,	",wsync" },
> +		{ XFS_FEAT_NOALIGN,	",noalign" },
> +		{ XFS_FEAT_SWALLOC,	",swalloc" },
> +		{ XFS_FEAT_NOUUID,	",nouuid" },
> +		{ XFS_FEAT_NORECOVERY,	",norecovery" },
> +		{ XFS_FEAT_ATTR2,	",attr2" },
> +		{ XFS_FEAT_FILESTREAMS,	",filestreams" },
> +		{ XFS_FEAT_GRPID,	",grpid" },
> +		{ XFS_FEAT_DISCARD,	",discard" },
> +		{ XFS_FEAT_SMALL_INUMS,	",inode32" },
> +		{ XFS_FEAT_DAX,		",dax" },
>  		{ 0, NULL }
>  	};
>  	static struct proc_xfs_info xfs_info_unset[] = {
>  		/* the few simple ones we can get from the mount struct */
> -		{ XFS_MOUNT_COMPAT_IOSIZE,	",largeio" },
> -		{ XFS_MOUNT_SMALL_INUMS,	",inode64" },
> +		{ XFS_FEAT_COMPAT_IOSIZE, ",largeio" },
> +		{ XFS_FEAT_SMALL_INUMS,	",inode64" },
>  		{ 0, NULL }
>  	};
>  	struct proc_xfs_info	*xfs_infop;
>  
>  	for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) {
> -		if (mp->m_flags & xfs_infop->flag)
> +		if (mp->m_features & xfs_infop->flag)
>  			seq_puts(m, xfs_infop->str);
>  	}
>  	for (xfs_infop = xfs_info_unset; xfs_infop->flag; xfs_infop++) {
> -		if (!(mp->m_flags & xfs_infop->flag))
> +		if (!(mp->m_features & xfs_infop->flag))
>  			seq_puts(m, xfs_infop->str);
>  	}
>  
> -	if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
> +	if (xfs_has_iosize(mp))
>  		seq_printf(m, ",allocsize=%dk",
>  				(int)(1 << mp->m_writeio_log) >> 10);
>  
> @@ -565,10 +563,10 @@ xfs_max_file_offset(
>  /*
>   * Set parameters for inode allocation heuristics, taking into account
>   * filesystem size and inode32/inode64 mount options; i.e. specifically
> - * whether or not XFS_MOUNT_SMALL_INUMS is set.
> + * whether or not XFS_FEAT_SMALL_INUMS is set.
>   *
>   * Inode allocation patterns are altered only if inode32 is requested
> - * (XFS_MOUNT_SMALL_INUMS), and the filesystem is sufficiently large.
> + * (XFS_FEAT_SMALL_INUMS), and the filesystem is sufficiently large.
>   * If altered, XFS_MOUNT_32BITINODES is set as well.
>   *
>   * An agcount independent of that in the mount structure is provided
> @@ -614,7 +612,7 @@ xfs_set_inode_alloc(
>  	 * sufficiently large, set XFS_MOUNT_32BITINODES if we must alter
>  	 * the allocator to accommodate the request.
>  	 */
> -	if ((mp->m_flags & XFS_MOUNT_SMALL_INUMS) && ino > XFS_MAXINUMBER_32)
> +	if (xfs_has_small_inums(mp) && ino > XFS_MAXINUMBER_32)
>  		mp->m_flags |= XFS_MOUNT_32BITINODES;
>  	else
>  		mp->m_flags &= ~XFS_MOUNT_32BITINODES;
> @@ -1261,11 +1259,11 @@ xfs_fs_remount(
>  		token = match_token(p, tokens, args);
>  		switch (token) {
>  		case Opt_inode64:
> -			mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
> +			mp->m_features &= ~XFS_FEAT_SMALL_INUMS;
>  			mp->m_maxagi = xfs_set_inode_alloc(mp, sbp->sb_agcount);
>  			break;
>  		case Opt_inode32:
> -			mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
> +			mp->m_features |= XFS_FEAT_SMALL_INUMS;
>  			mp->m_maxagi = xfs_set_inode_alloc(mp, sbp->sb_agcount);
>  			break;
>  		default:
> @@ -1297,7 +1295,7 @@ xfs_fs_remount(
>  
>  	/* ro -> rw */
>  	if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & SB_RDONLY)) {
> -		if (mp->m_flags & XFS_MOUNT_NORECOVERY) {
> +		if (xfs_has_norecovery(mp)) {
>  			xfs_warn(mp,
>  		"ro->rw transition prohibited on norecovery mount");
>  			return -EINVAL;
> @@ -1460,21 +1458,12 @@ xfs_finish_flags(
>  	/*
>  	 * V5 filesystems always use attr2 format for attributes.
>  	 */
> -	if (xfs_has_crc(mp) &&
> -	    (mp->m_flags & XFS_MOUNT_NOATTR2)) {
> +	if (xfs_has_crc(mp) && xfs_has_noattr2(mp)) {
>  		xfs_warn(mp, "Cannot mount a V5 filesystem as noattr2. "
>  			     "attr2 is always enabled for V5 filesystems.");
>  		return -EINVAL;
>  	}
>  
> -	/*
> -	 * mkfs'ed attr2 will turn on attr2 mount unless explicitly
> -	 * told by noattr2 to turn it off
> -	 */
> -	if (xfs_has_attr2(mp) &&
> -	    !(mp->m_flags & XFS_MOUNT_NOATTR2))
> -		mp->m_flags |= XFS_MOUNT_ATTR2;
> -
>  	/*
>  	 * prohibit r/w mounts of read-only filesystems
>  	 */
> @@ -1662,7 +1651,7 @@ xfs_fs_fill_super(
>  	if (XFS_SB_VERSION_NUM(&mp->m_sb) == XFS_SB_VERSION_5)
>  		sb->s_flags |= SB_I_VERSION;
>  
> -	if (mp->m_flags & XFS_MOUNT_DAX) {
> +	if (xfs_has_dax(mp)) {
>  		bool rtdev_is_dax = false, datadev_is_dax;
>  
>  		xfs_warn(mp,
> @@ -1676,7 +1665,7 @@ xfs_fs_fill_super(
>  		if (!rtdev_is_dax && !datadev_is_dax) {
>  			xfs_alert(mp,
>  			"DAX unsupported by block device. Turning off DAX.");
> -			mp->m_flags &= ~XFS_MOUNT_DAX;
> +			mp->m_features &= ~XFS_FEAT_DAX;
>  		}
>  		if (xfs_has_reflink(mp)) {
>  			xfs_alert(mp,
> @@ -1686,13 +1675,13 @@ xfs_fs_fill_super(
>  		}
>  	}
>  
> -	if (mp->m_flags & XFS_MOUNT_DISCARD) {
> +	if (xfs_has_discard(mp)) {
>  		struct request_queue *q = bdev_get_queue(sb->s_bdev);
>  
>  		if (!blk_queue_discard(q)) {
>  			xfs_warn(mp, "mounting with \"discard\" option, but "
>  					"the device does not support discard");
> -			mp->m_flags &= ~XFS_MOUNT_DISCARD;
> +			mp->m_features &= ~XFS_FEAT_DISCARD;
>  		}
>  	}
>  
> diff --git a/fs/xfs/xfs_symlink.c b/fs/xfs/xfs_symlink.c
> index 647a9aa98646..675481028292 100644
> --- a/fs/xfs/xfs_symlink.c
> +++ b/fs/xfs/xfs_symlink.c
> @@ -339,9 +339,8 @@ xfs_symlink(
>  	 * symlink transaction goes to disk before returning to
>  	 * the user.
>  	 */
> -	if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) {
> +	if (xfs_has_wsync(mp) || xfs_has_dirsync(mp))
>  		xfs_trans_set_sync(tp);
> -	}
>  
>  	error = xfs_trans_commit(tp);
>  	if (error)
> -- 
> 2.17.0
>