kvfree(ab->freemap);
ab->freemap = NULL;
+ kvfree(ab->usedmap);
+ ab->usedmap = NULL;
}
/*
size_t value_size,
gfp_t flags)
{
- size_t sz;
+ size_t sz = value_size;
size_t bmp_sz;
struct xchk_xattr_buf *ab = sc->buf;
+ unsigned long *old_usedmap = NULL;
unsigned long *old_freemap = NULL;
bmp_sz = sizeof(long) * BITS_TO_LONGS(sc->mp->m_attr_geo->blksize);
/*
- * We need enough space to read an xattr value from the file or enough
- * space to hold one copy of the xattr free space bitmap. We don't
- * need the buffer space for both purposes at the same time.
- */
- sz = max_t(size_t, bmp_sz, value_size);
-
- /*
* If there's already a buffer, figure out if we need to reallocate it
* to accommodate a larger size.
*/
if (sz <= ab->sz)
return 0;
old_freemap = ab->freemap;
+ old_usedmap = ab->usedmap;
kvfree(ab);
sc->buf = NULL;
}
sc->buf = ab;
sc->buf_cleanup = xchk_xattr_buf_cleanup;
+ if (old_usedmap) {
+ ab->usedmap = old_usedmap;
+ } else {
+ ab->usedmap = kvmalloc(bmp_sz, flags);
+ if (!ab->usedmap)
+ return -ENOMEM;
+ }
+
if (old_freemap) {
ab->freemap = old_freemap;
} else {
STATIC bool
xchk_xattr_check_freemap(
struct xfs_scrub *sc,
- unsigned long *map,
struct xfs_attr3_icleaf_hdr *leafhdr)
{
struct xchk_xattr_buf *ab = sc->buf;
}
/* Look for bits that are set in freemap and are marked in use. */
- return !bitmap_intersects(ab->freemap, map, mapsize);
+ return !bitmap_intersects(ab->freemap, ab->usedmap, mapsize);
}
/*
__u32 *last_hashval)
{
struct xfs_mount *mp = ds->state->mp;
- unsigned long *usedmap = xchk_xattr_usedmap(ds->sc);
+ struct xchk_xattr_buf *ab = ds->sc->buf;
char *name_end;
struct xfs_attr_leaf_name_local *lentry;
struct xfs_attr_leaf_name_remote *rentry;
if (name_end > buf_end)
xchk_da_set_corrupt(ds, level);
- if (!xchk_xattr_set_map(ds->sc, usedmap, nameidx, namesize))
+ if (!xchk_xattr_set_map(ds->sc, ab->usedmap, nameidx, namesize))
xchk_da_set_corrupt(ds, level);
if (!(ds->sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT))
*usedbytes += namesize;
struct xfs_attr_leafblock *leaf = bp->b_addr;
struct xfs_attr_leaf_entry *ent;
struct xfs_attr_leaf_entry *entries;
- unsigned long *usedmap;
+ struct xchk_xattr_buf *ab = ds->sc->buf;
char *buf_end;
size_t off;
__u32 last_hashval = 0;
return -EDEADLOCK;
if (error)
return error;
- usedmap = xchk_xattr_usedmap(ds->sc);
*last_checked = blk->blkno;
- bitmap_zero(usedmap, mp->m_attr_geo->blksize);
+ bitmap_zero(ab->usedmap, mp->m_attr_geo->blksize);
/* Check all the padding. */
if (xfs_has_crc(ds->sc->mp)) {
xchk_da_set_corrupt(ds, level);
if (leafhdr.firstused < hdrsize)
xchk_da_set_corrupt(ds, level);
- if (!xchk_xattr_set_map(ds->sc, usedmap, 0, hdrsize))
+ if (!xchk_xattr_set_map(ds->sc, ab->usedmap, 0, hdrsize))
xchk_da_set_corrupt(ds, level);
if (ds->sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
for (i = 0, ent = entries; i < leafhdr.count; ent++, i++) {
/* Mark the leaf entry itself. */
off = (char *)ent - (char *)leaf;
- if (!xchk_xattr_set_map(ds->sc, usedmap, off,
+ if (!xchk_xattr_set_map(ds->sc, ab->usedmap, off,
sizeof(xfs_attr_leaf_entry_t))) {
xchk_da_set_corrupt(ds, level);
goto out;
goto out;
}
- if (!xchk_xattr_check_freemap(ds->sc, usedmap, &leafhdr))
+ if (!xchk_xattr_check_freemap(ds->sc, &leafhdr))
xchk_da_set_corrupt(ds, level);
if (leafhdr.usedbytes != usedbytes)
* Temporary storage for online scrub and repair of extended attributes.
*/
struct xchk_xattr_buf {
+ /* Bitmap of used space in xattr leaf blocks. */
+ unsigned long *usedmap;
+
/* Bitmap of free space in xattr leaf blocks. */
unsigned long *freemap;
size_t sz;
/*
- * Memory buffer -- either used for extracting attr values while
- * walking the attributes; or for computing attr block bitmaps when
- * checking the attribute tree.
- *
- * Each bitmap contains enough bits to track every byte in an attr
- * block (rounded up to the size of an unsigned long). The attr block
- * used space bitmap starts at the beginning of the buffer.
+ * Memory buffer -- used for extracting attr values while walking the
+ * attributes.
*/
uint8_t buf[];
};
return ab->buf;
}
-/* A bitmap of space usage computed by walking an attr leaf block. */
-static inline unsigned long *
-xchk_xattr_usedmap(
- struct xfs_scrub *sc)
-{
- struct xchk_xattr_buf *ab = sc->buf;
-
- return (unsigned long *)ab->buf;
-}
-
#endif /* __XFS_SCRUB_ATTR_H__ */