Commit a7492333 authored by Darrick J. Wong's avatar Darrick J. Wong
Browse files

xfs: scrub metadir paths for rtgroup metadata 



Add the code we need to scan the metadata directory paths of rt group
metadata files.

Signed-off-by: default avatarDarrick J. Wong <djwong@kernel.org>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
parent 1433f8f9

fs/xfs/libxfs/xfs_fs.h

+4 −1
Original line number Diff line number Diff line
@@ -822,9 +822,12 @@ struct xfs_scrub_vec_head { 
 * path checking.

 */

#define XFS_SCRUB_METAPATH_PROBE	(0)  /* do we have a metapath scrubber? */

#define XFS_SCRUB_METAPATH_RTDIR	(1)  /* rtrgroups metadir */

#define XFS_SCRUB_METAPATH_RTBITMAP	(2)  /* per-rtg bitmap */

#define XFS_SCRUB_METAPATH_RTSUMMARY	(3)  /* per-rtg summary */



/* Number of metapath sm_ino values */

#define XFS_SCRUB_METAPATH_NR		(1)

#define XFS_SCRUB_METAPATH_NR		(4)



/*

 * ioctl limits

fs/xfs/scrub/metapath.c

+92 −0
Original line number Diff line number Diff line
@@ -20,6 +20,7 @@ 
#include "xfs_bmap_btree.h"

#include "xfs_trans_space.h"

#include "xfs_attr.h"

#include "xfs_rtgroup.h"

#include "scrub/scrub.h"

#include "scrub/common.h"

#include "scrub/trace.h"
@@ -79,6 +80,91 @@ xchk_metapath_cleanup( 
	kfree(mpath->path);

}



/* Set up a metadir path scan.  @path must be dynamically allocated. */

static inline int

xchk_setup_metapath_scan(

	struct xfs_scrub	*sc,

	struct xfs_inode	*dp,

	const char		*path,

	struct xfs_inode	*ip)

{

	struct xchk_metapath	*mpath;

	int			error;



	if (!path)

		return -ENOMEM;



	error = xchk_install_live_inode(sc, ip);

	if (error) {

		kfree(path);

		return error;

	}



	mpath = kzalloc(sizeof(struct xchk_metapath), XCHK_GFP_FLAGS);

	if (!mpath) {

		kfree(path);

		return -ENOMEM;

	}



	mpath->sc = sc;

	sc->buf = mpath;

	sc->buf_cleanup = xchk_metapath_cleanup;



	mpath->dp = dp;

	mpath->path = path; /* path is now owned by mpath */



	mpath->xname.name = mpath->path;

	mpath->xname.len = strlen(mpath->path);

	mpath->xname.type = xfs_mode_to_ftype(VFS_I(ip)->i_mode);



	return 0;

}



#ifdef CONFIG_XFS_RT

/* Scan the /rtgroups directory itself. */

static int

xchk_setup_metapath_rtdir(

	struct xfs_scrub	*sc)

{

	if (!sc->mp->m_rtdirip)

		return -ENOENT;



	return xchk_setup_metapath_scan(sc, sc->mp->m_metadirip,

			kasprintf(GFP_KERNEL, "rtgroups"), sc->mp->m_rtdirip);

}



/* Scan a rtgroup inode under the /rtgroups directory. */

static int

xchk_setup_metapath_rtginode(

	struct xfs_scrub	*sc,

	enum xfs_rtg_inodes	type)

{

	struct xfs_rtgroup	*rtg;

	struct xfs_inode	*ip;

	int			error;



	rtg = xfs_rtgroup_get(sc->mp, sc->sm->sm_agno);

	if (!rtg)

		return -ENOENT;



	ip = rtg->rtg_inodes[type];

	if (!ip) {

		error = -ENOENT;

		goto out_put_rtg;

	}



	error = xchk_setup_metapath_scan(sc, sc->mp->m_rtdirip,

			xfs_rtginode_path(rtg_rgno(rtg), type), ip);



out_put_rtg:

	xfs_rtgroup_put(rtg);

	return error;

}

#else

# define xchk_setup_metapath_rtdir(...)		(-ENOENT)

# define xchk_setup_metapath_rtginode(...)	(-ENOENT)

#endif /* CONFIG_XFS_RT */



int

xchk_setup_metapath(

	struct xfs_scrub	*sc)
@@ -94,6 +180,12 @@ xchk_setup_metapath( 
		if (sc->sm->sm_agno)

			return -EINVAL;

		return 0;

	case XFS_SCRUB_METAPATH_RTDIR:

		return xchk_setup_metapath_rtdir(sc);

	case XFS_SCRUB_METAPATH_RTBITMAP:

		return xchk_setup_metapath_rtginode(sc, XFS_RTGI_BITMAP);

	case XFS_SCRUB_METAPATH_RTSUMMARY:

		return xchk_setup_metapath_rtginode(sc, XFS_RTGI_SUMMARY);

	default:

		return -ENOENT;

	}