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xfs: scrub metadir paths for rtgroup metadata

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

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Darrick J. Wong 2024-11-03 20:19:31 -08:00
parent 1433f8f9ce
commit a74923333d
2 changed files with 96 additions and 1 deletions
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5
fs/xfs/libxfs/xfs_fs.h
View File

@ -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

92
fs/xfs/scrub/metapath.c
View File

@ -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;
}