/*
* Convert from in-memory XFS to extended attribute representation.
*/
STATIC int
posix_acl_xfs_to_xattr(
xfs_acl_t *src,
posix_acl_xattr_header *dest,
size_t size)
{
int n;
size_t new_size = posix_acl_xattr_size(src->acl_cnt);
posix_acl_xattr_entry *dest_entry;
xfs_acl_entry_t *src_entry;
if (size < new_size)
return -ERANGE;
/* Need to sort src XFS ACL by <ae_tag,ae_id> */
xfs_sort(src->acl_entry, src->acl_cnt, sizeof(src->acl_entry[0]),
xfs_acl_entry_compare);
dest->a_version = cpu_to_le32(POSIX_ACL_XATTR_VERSION);
dest_entry = &dest->a_entries[0];
src_entry = &src->acl_entry[0];
for (n = 0; n < src->acl_cnt; n++, dest_entry++, src_entry++) {
dest_entry->e_perm = cpu_to_le16(src_entry->ae_perm);
if (_ACL_PERM_INVALID(src_entry->ae_perm))
return -EINVAL;
dest_entry->e_tag = cpu_to_le16(src_entry->ae_tag);
switch (src_entry->ae_tag) {
case ACL_USER:
case ACL_GROUP:
dest_entry->e_id = cpu_to_le32(src_entry->ae_id);
break;
case ACL_USER_OBJ:
case ACL_GROUP_OBJ:
case ACL_MASK:
case ACL_OTHER:
dest_entry->e_id = cpu_to_le32(ACL_UNDEFINED_ID);
break;
default:
return -EINVAL;
}
}
return new_size;
}
/*
* Get filesystem's extents as described in head, and format for
* output. Calls formatter to fill the user's buffer until all
* extents are mapped, until the passed-in head->fmh_count slots have
* been filled, or until the formatter short-circuits the loop, if it
* is tracking filled-in extents on its own.
*
* Key to Confusion
* ----------------
* There are multiple levels of keys and counters at work here:
* xfs_fsmap_head.fmh_keys -- low and high fsmap keys passed in;
* these reflect fs-wide sector addrs.
* dkeys -- fmh_keys used to query each device;
* these are fmh_keys but w/ the low key
* bumped up by fmr_length.
* xfs_getfsmap_info.next_daddr -- next disk addr we expect to see; this
* is how we detect gaps in the fsmap
records and report them.
* xfs_getfsmap_info.low/high -- per-AG low/high keys computed from
* dkeys; used to query the metadata.
*/
int
xfs_getfsmap(
struct xfs_mount *mp,
struct xfs_fsmap_head *head,
xfs_fsmap_format_t formatter,
void *arg)
{
struct xfs_trans *tp = NULL;
struct xfs_fsmap dkeys[2]; /* per-dev keys */
struct xfs_getfsmap_dev handlers[XFS_GETFSMAP_DEVS];
struct xfs_getfsmap_info info = { NULL };
bool use_rmap;
int i;
int error = 0;
if (head->fmh_iflags & ~FMH_IF_VALID)
return -EINVAL;
if (!xfs_getfsmap_is_valid_device(mp, &head->fmh_keys[0]) ||
!xfs_getfsmap_is_valid_device(mp, &head->fmh_keys[1]))
return -EINVAL;
use_rmap = capable(CAP_SYS_ADMIN) &&
xfs_sb_version_hasrmapbt(&mp->m_sb);
head->fmh_entries = 0;
/* Set up our device handlers. */
memset(handlers, 0, sizeof(handlers));
handlers[0].dev = new_encode_dev(mp->m_ddev_targp->bt_dev);
if (use_rmap)
handlers[0].fn = xfs_getfsmap_datadev_rmapbt;
else
handlers[0].fn = xfs_getfsmap_datadev_bnobt;
if (mp->m_logdev_targp != mp->m_ddev_targp) {
handlers[1].dev = new_encode_dev(mp->m_logdev_targp->bt_dev);
handlers[1].fn = xfs_getfsmap_logdev;
}
#ifdef CONFIG_XFS_RT
if (mp->m_rtdev_targp) {
handlers[2].dev = new_encode_dev(mp->m_rtdev_targp->bt_dev);
handlers[2].fn = xfs_getfsmap_rtdev_rtbitmap;
}
#endif /* CONFIG_XFS_RT */
xfs_sort(handlers, XFS_GETFSMAP_DEVS, sizeof(struct xfs_getfsmap_dev),
xfs_getfsmap_dev_compare);
/*
* To continue where we left off, we allow userspace to use the
* last mapping from a previous call as the low key of the next.
* This is identified by a non-zero length in the low key. We
* have to increment the low key in this scenario to ensure we
* don't return the same mapping again, and instead return the
* very next mapping.
*
* If the low key mapping refers to file data, the same physical
* blocks could be mapped to several other files/offsets.
* According to rmapbt record ordering, the minimal next
* possible record for the block range is the next starting
* offset in the same inode. Therefore, bump the file offset to
* continue the search appropriately. For all other low key
* mapping types (attr blocks, metadata), bump the physical
* offset as there can be no other mapping for the same physical
* block range.
*/
dkeys[0] = head->fmh_keys[0];
if (dkeys[0].fmr_flags & (FMR_OF_SPECIAL_OWNER | FMR_OF_EXTENT_MAP)) {
dkeys[0].fmr_physical += dkeys[0].fmr_length;
dkeys[0].fmr_owner = 0;
if (dkeys[0].fmr_offset)
return -EINVAL;
} else
dkeys[0].fmr_offset += dkeys[0].fmr_length;
dkeys[0].fmr_length = 0;
memset(&dkeys[1], 0xFF, sizeof(struct xfs_fsmap));
if (!xfs_getfsmap_check_keys(dkeys, &head->fmh_keys[1]))
return -EINVAL;
info.next_daddr = head->fmh_keys[0].fmr_physical +
head->fmh_keys[0].fmr_length;
info.formatter = formatter;
info.format_arg = arg;
info.head = head;
/* For each device we support... */
for (i = 0; i < XFS_GETFSMAP_DEVS; i++) {
/* Is this device within the range the user asked for? */
if (!handlers[i].fn)
continue;
if (head->fmh_keys[0].fmr_device > handlers[i].dev)
continue;
if (head->fmh_keys[1].fmr_device < handlers[i].dev)
break;
/*
* If this device number matches the high key, we have
* to pass the high key to the handler to limit the
* query results. If the device number exceeds the
* low key, zero out the low key so that we get
* everything from the beginning.
*/
if (handlers[i].dev == head->fmh_keys[1].fmr_device)
dkeys[1] = head->fmh_keys[1];
if (handlers[i].dev > head->fmh_keys[0].fmr_device)
memset(&dkeys[0], 0, sizeof(struct xfs_fsmap));
error = xfs_trans_alloc_empty(mp, &tp);
if (error)
break;
info.dev = handlers[i].dev;
info.last = false;
info.agno = NULLAGNUMBER;
error = handlers[i].fn(tp, dkeys, &info);
if (error)
break;
xfs_trans_cancel(tp);
tp = NULL;
info.next_daddr = 0;
}
if (tp)
xfs_trans_cancel(tp);
head->fmh_oflags = FMH_OF_DEV_T;
return error;
}
/*
* Convert the shortform directory to block form.
*/
int /* error */
xfs_dir2_sf_to_block(
xfs_da_args_t *args) /* operation arguments */
{
xfs_dir2_db_t blkno; /* dir-relative block # (0) */
xfs_dir2_data_hdr_t *hdr; /* block header */
xfs_dir2_leaf_entry_t *blp; /* block leaf entries */
struct xfs_buf *bp; /* block buffer */
xfs_dir2_block_tail_t *btp; /* block tail pointer */
xfs_dir2_data_entry_t *dep; /* data entry pointer */
xfs_inode_t *dp; /* incore directory inode */
int dummy; /* trash */
xfs_dir2_data_unused_t *dup; /* unused entry pointer */
int endoffset; /* end of data objects */
int error; /* error return value */
int i; /* index */
xfs_mount_t *mp; /* filesystem mount point */
int needlog; /* need to log block header */
int needscan; /* need to scan block freespc */
int newoffset; /* offset from current entry */
int offset; /* target block offset */
xfs_dir2_sf_entry_t *sfep; /* sf entry pointer */
xfs_dir2_sf_hdr_t *oldsfp; /* old shortform header */
xfs_dir2_sf_hdr_t *sfp; /* shortform header */
__be16 *tagp; /* end of data entry */
xfs_trans_t *tp; /* transaction pointer */
struct xfs_name name;
struct xfs_ifork *ifp;
trace_xfs_dir2_sf_to_block(args);
dp = args->dp;
tp = args->trans;
mp = dp->i_mount;
ifp = XFS_IFORK_PTR(dp, XFS_DATA_FORK);
ASSERT(ifp->if_flags & XFS_IFINLINE);
/*
* Bomb out if the shortform directory is way too short.
*/
if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
ASSERT(XFS_FORCED_SHUTDOWN(mp));
return -EIO;
}
oldsfp = (xfs_dir2_sf_hdr_t *)ifp->if_u1.if_data;
ASSERT(ifp->if_bytes == dp->i_d.di_size);
ASSERT(ifp->if_u1.if_data != NULL);
ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(oldsfp->i8count));
ASSERT(dp->i_d.di_nextents == 0);
/*
* Copy the directory into a temporary buffer.
* Then pitch the incore inode data so we can make extents.
*/
sfp = kmem_alloc(ifp->if_bytes, KM_SLEEP);
memcpy(sfp, oldsfp, ifp->if_bytes);
xfs_idata_realloc(dp, -ifp->if_bytes, XFS_DATA_FORK);
xfs_bmap_local_to_extents_empty(dp, XFS_DATA_FORK);
dp->i_d.di_size = 0;
/*
* Add block 0 to the inode.
*/
error = xfs_dir2_grow_inode(args, XFS_DIR2_DATA_SPACE, &blkno);
if (error) {
kmem_free(sfp);
return error;
}
/*
* Initialize the data block, then convert it to block format.
*/
error = xfs_dir3_data_init(args, blkno, &bp);
if (error) {
kmem_free(sfp);
return error;
}
xfs_dir3_block_init(mp, tp, bp, dp);
hdr = bp->b_addr;
/*
* Compute size of block "tail" area.
*/
i = (uint)sizeof(*btp) +
(sfp->count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t);
/*
* The whole thing is initialized to free by the init routine.
* Say we're using the leaf and tail area.
*/
dup = dp->d_ops->data_unused_p(hdr);
needlog = needscan = 0;
xfs_dir2_data_use_free(args, bp, dup, args->geo->blksize - i,
i, &needlog, &needscan);
ASSERT(needscan == 0);
/*
* Fill in the tail.
*/
btp = xfs_dir2_block_tail_p(args->geo, hdr);
btp->count = cpu_to_be32(sfp->count + 2); /* ., .. */
btp->stale = 0;
blp = xfs_dir2_block_leaf_p(btp);
endoffset = (uint)((char *)blp - (char *)hdr);
/*
* Remove the freespace, we'll manage it.
*/
xfs_dir2_data_use_free(args, bp, dup,
(xfs_dir2_data_aoff_t)((char *)dup - (char *)hdr),
be16_to_cpu(dup->length), &needlog, &needscan);
/*
* Create entry for .
*/
dep = dp->d_ops->data_dot_entry_p(hdr);
dep->inumber = cpu_to_be64(dp->i_ino);
dep->namelen = 1;
dep->name[0] = '.';
dp->d_ops->data_put_ftype(dep, XFS_DIR3_FT_DIR);
tagp = dp->d_ops->data_entry_tag_p(dep);
*tagp = cpu_to_be16((char *)dep - (char *)hdr);
xfs_dir2_data_log_entry(args, bp, dep);
blp[0].hashval = cpu_to_be32(xfs_dir_hash_dot);
blp[0].address = cpu_to_be32(xfs_dir2_byte_to_dataptr(
(char *)dep - (char *)hdr));
/*
* Create entry for ..
*/
dep = dp->d_ops->data_dotdot_entry_p(hdr);
dep->inumber = cpu_to_be64(dp->d_ops->sf_get_parent_ino(sfp));
dep->namelen = 2;
dep->name[0] = dep->name[1] = '.';
dp->d_ops->data_put_ftype(dep, XFS_DIR3_FT_DIR);
tagp = dp->d_ops->data_entry_tag_p(dep);
*tagp = cpu_to_be16((char *)dep - (char *)hdr);
xfs_dir2_data_log_entry(args, bp, dep);
blp[1].hashval = cpu_to_be32(xfs_dir_hash_dotdot);
blp[1].address = cpu_to_be32(xfs_dir2_byte_to_dataptr(
(char *)dep - (char *)hdr));
offset = dp->d_ops->data_first_offset;
/*
* Loop over existing entries, stuff them in.
*/
i = 0;
if (!sfp->count)
sfep = NULL;
else
sfep = xfs_dir2_sf_firstentry(sfp);
/*
* Need to preserve the existing offset values in the sf directory.
* Insert holes (unused entries) where necessary.
*/
while (offset < endoffset) {
/*
* sfep is null when we reach the end of the list.
*/
if (sfep == NULL)
newoffset = endoffset;
else
newoffset = xfs_dir2_sf_get_offset(sfep);
/*
* There should be a hole here, make one.
*/
if (offset < newoffset) {
dup = (xfs_dir2_data_unused_t *)((char *)hdr + offset);
dup->freetag = cpu_to_be16(XFS_DIR2_DATA_FREE_TAG);
dup->length = cpu_to_be16(newoffset - offset);
*xfs_dir2_data_unused_tag_p(dup) = cpu_to_be16(
((char *)dup - (char *)hdr));
xfs_dir2_data_log_unused(args, bp, dup);
xfs_dir2_data_freeinsert(hdr,
dp->d_ops->data_bestfree_p(hdr),
dup, &dummy);
offset += be16_to_cpu(dup->length);
continue;
}
/*
* Copy a real entry.
*/
dep = (xfs_dir2_data_entry_t *)((char *)hdr + newoffset);
dep->inumber = cpu_to_be64(dp->d_ops->sf_get_ino(sfp, sfep));
dep->namelen = sfep->namelen;
dp->d_ops->data_put_ftype(dep, dp->d_ops->sf_get_ftype(sfep));
memcpy(dep->name, sfep->name, dep->namelen);
tagp = dp->d_ops->data_entry_tag_p(dep);
*tagp = cpu_to_be16((char *)dep - (char *)hdr);
xfs_dir2_data_log_entry(args, bp, dep);
name.name = sfep->name;
name.len = sfep->namelen;
blp[2 + i].hashval = cpu_to_be32(mp->m_dirnameops->
hashname(&name));
blp[2 + i].address = cpu_to_be32(xfs_dir2_byte_to_dataptr(
(char *)dep - (char *)hdr));
offset = (int)((char *)(tagp + 1) - (char *)hdr);
if (++i == sfp->count)
sfep = NULL;
else
sfep = dp->d_ops->sf_nextentry(sfp, sfep);
}
/* Done with the temporary buffer */
kmem_free(sfp);
/*
* Sort the leaf entries by hash value.
*/
xfs_sort(blp, be32_to_cpu(btp->count), sizeof(*blp), xfs_dir2_block_sort);
/*
* Log the leaf entry area and tail.
* Already logged the header in data_init, ignore needlog.
*/
ASSERT(needscan == 0);
xfs_dir2_block_log_leaf(tp, bp, 0, be32_to_cpu(btp->count) - 1);
xfs_dir2_block_log_tail(tp, bp);
xfs_dir3_data_check(dp, bp);
return 0;
}
/*
* Copy out entries of shortform attribute lists for attr_list().
* Shortform attribute lists are not stored in hashval sorted order.
* If the output buffer is not large enough to hold them all, then we
* we have to calculate each entries' hashvalue and sort them before
* we can begin returning them to the user.
*/
static int
xfs_attr_shortform_list(xfs_attr_list_context_t *context)
{
attrlist_cursor_kern_t *cursor;
xfs_attr_sf_sort_t *sbuf, *sbp;
xfs_attr_shortform_t *sf;
xfs_attr_sf_entry_t *sfe;
xfs_inode_t *dp;
int sbsize, nsbuf, count, i;
int error;
ASSERT(context != NULL);
dp = context->dp;
ASSERT(dp != NULL);
ASSERT(dp->i_afp != NULL);
sf = (xfs_attr_shortform_t *)dp->i_afp->if_u1.if_data;
ASSERT(sf != NULL);
if (!sf->hdr.count)
return 0;
cursor = context->cursor;
ASSERT(cursor != NULL);
trace_xfs_attr_list_sf(context);
/*
* If the buffer is large enough and the cursor is at the start,
* do not bother with sorting since we will return everything in
* one buffer and another call using the cursor won't need to be
* made.
* Note the generous fudge factor of 16 overhead bytes per entry.
* If bufsize is zero then put_listent must be a search function
* and can just scan through what we have.
*/
if (context->bufsize == 0 ||
(XFS_ISRESET_CURSOR(cursor) &&
(dp->i_afp->if_bytes + sf->hdr.count * 16) < context->bufsize)) {
for (i = 0, sfe = &sf->list[0]; i < sf->hdr.count; i++) {
error = context->put_listent(context,
sfe->flags,
sfe->nameval,
(int)sfe->namelen,
(int)sfe->valuelen);
if (error)
return error;
/*
* Either search callback finished early or
* didn't fit it all in the buffer after all.
*/
if (context->seen_enough)
break;
sfe = XFS_ATTR_SF_NEXTENTRY(sfe);
}
trace_xfs_attr_list_sf_all(context);
return 0;
}
/* do no more for a search callback */
if (context->bufsize == 0)
return 0;
/*
* It didn't all fit, so we have to sort everything on hashval.
*/
sbsize = sf->hdr.count * sizeof(*sbuf);
sbp = sbuf = kmem_alloc(sbsize, KM_SLEEP | KM_NOFS);
/*
* Scan the attribute list for the rest of the entries, storing
* the relevant info from only those that match into a buffer.
*/
nsbuf = 0;
for (i = 0, sfe = &sf->list[0]; i < sf->hdr.count; i++) {
if (unlikely(
((char *)sfe < (char *)sf) ||
((char *)sfe >= ((char *)sf + dp->i_afp->if_bytes)))) {
XFS_CORRUPTION_ERROR("xfs_attr_shortform_list",
XFS_ERRLEVEL_LOW,
context->dp->i_mount, sfe);
kmem_free(sbuf);
return -EFSCORRUPTED;
}
sbp->entno = i;
sbp->hash = xfs_da_hashname(sfe->nameval, sfe->namelen);
sbp->name = sfe->nameval;
sbp->namelen = sfe->namelen;
/* These are bytes, and both on-disk, don't endian-flip */
sbp->valuelen = sfe->valuelen;
sbp->flags = sfe->flags;
sfe = XFS_ATTR_SF_NEXTENTRY(sfe);
sbp++;
nsbuf++;
}
/*
* Sort the entries on hash then entno.
*/
xfs_sort(sbuf, nsbuf, sizeof(*sbuf), xfs_attr_shortform_compare);
/*
* Re-find our place IN THE SORTED LIST.
*/
count = 0;
cursor->initted = 1;
cursor->blkno = 0;
for (sbp = sbuf, i = 0; i < nsbuf; i++, sbp++) {
if (sbp->hash == cursor->hashval) {
if (cursor->offset == count) {
break;
}
count++;
} else if (sbp->hash > cursor->hashval) {
break;
}
}
if (i == nsbuf) {
kmem_free(sbuf);
return 0;
}
/*
* Loop putting entries into the user buffer.
*/
for ( ; i < nsbuf; i++, sbp++) {
if (cursor->hashval != sbp->hash) {
cursor->hashval = sbp->hash;
cursor->offset = 0;
}
error = context->put_listent(context,
sbp->flags,
sbp->name,
sbp->namelen,
sbp->valuelen);
if (error) {
kmem_free(sbuf);
return error;
}
if (context->seen_enough)
break;
cursor->offset++;
}
kmem_free(sbuf);
return 0;
}
/*
* Convert the shortform directory to block form.
*/
int /* error */
xfs_dir2_sf_to_block(
xfs_da_args_t *args) /* operation arguments */
{
xfs_dir2_db_t blkno; /* dir-relative block # (0) */
xfs_dir2_block_t *block; /* block structure */
xfs_dir2_leaf_entry_t *blp; /* block leaf entries */
xfs_dabuf_t *bp; /* block buffer */
xfs_dir2_block_tail_t *btp; /* block tail pointer */
char *buf; /* sf buffer */
int buf_len;
xfs_dir2_data_entry_t *dep; /* data entry pointer */
xfs_inode_t *dp; /* incore directory inode */
int dummy; /* trash */
xfs_dir2_data_unused_t *dup; /* unused entry pointer */
int endoffset; /* end of data objects */
int error; /* error return value */
int i; /* index */
xfs_mount_t *mp; /* filesystem mount point */
int needlog; /* need to log block header */
int needscan; /* need to scan block freespc */
int newoffset; /* offset from current entry */
int offset; /* target block offset */
xfs_dir2_sf_entry_t *sfep; /* sf entry pointer */
xfs_dir2_sf_t *sfp; /* shortform structure */
__be16 *tagp; /* end of data entry */
xfs_trans_t *tp; /* transaction pointer */
struct xfs_name name;
trace_xfs_dir2_sf_to_block(args);
dp = args->dp;
tp = args->trans;
mp = dp->i_mount;
ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
/*
* Bomb out if the shortform directory is way too short.
*/
if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
ASSERT(XFS_FORCED_SHUTDOWN(mp));
return XFS_ERROR(EIO);
}
ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
ASSERT(dp->i_df.if_u1.if_data != NULL);
sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->hdr.i8count));
/*
* Copy the directory into the stack buffer.
* Then pitch the incore inode data so we can make extents.
*/
buf_len = dp->i_df.if_bytes;
buf = kmem_alloc(buf_len, KM_SLEEP);
memcpy(buf, sfp, buf_len);
xfs_idata_realloc(dp, -buf_len, XFS_DATA_FORK);
dp->i_d.di_size = 0;
xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE);
/*
* Reset pointer - old sfp is gone.
*/
sfp = (xfs_dir2_sf_t *)buf;
/*
* Add block 0 to the inode.
*/
error = xfs_dir2_grow_inode(args, XFS_DIR2_DATA_SPACE, &blkno);
if (error) {
kmem_free(buf);
return error;
}
/*
* Initialize the data block.
*/
error = xfs_dir2_data_init(args, blkno, &bp);
if (error) {
kmem_free(buf);
return error;
}
block = bp->data;
block->hdr.magic = cpu_to_be32(XFS_DIR2_BLOCK_MAGIC);
/*
* Compute size of block "tail" area.
*/
i = (uint)sizeof(*btp) +
(sfp->hdr.count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t);
/*
* The whole thing is initialized to free by the init routine.
* Say we're using the leaf and tail area.
*/
dup = (xfs_dir2_data_unused_t *)block->u;
needlog = needscan = 0;
xfs_dir2_data_use_free(tp, bp, dup, mp->m_dirblksize - i, i, &needlog,
&needscan);
ASSERT(needscan == 0);
/*
* Fill in the tail.
*/
btp = xfs_dir2_block_tail_p(mp, block);
btp->count = cpu_to_be32(sfp->hdr.count + 2); /* ., .. */
btp->stale = 0;
blp = xfs_dir2_block_leaf_p(btp);
endoffset = (uint)((char *)blp - (char *)block);
/*
* Remove the freespace, we'll manage it.
*/
xfs_dir2_data_use_free(tp, bp, dup,
(xfs_dir2_data_aoff_t)((char *)dup - (char *)block),
be16_to_cpu(dup->length), &needlog, &needscan);
/*
* Create entry for .
*/
dep = (xfs_dir2_data_entry_t *)
((char *)block + XFS_DIR2_DATA_DOT_OFFSET);
dep->inumber = cpu_to_be64(dp->i_ino);
dep->namelen = 1;
dep->name[0] = '.';
tagp = xfs_dir2_data_entry_tag_p(dep);
*tagp = cpu_to_be16((char *)dep - (char *)block);
xfs_dir2_data_log_entry(tp, bp, dep);
blp[0].hashval = cpu_to_be32(xfs_dir_hash_dot);
blp[0].address = cpu_to_be32(xfs_dir2_byte_to_dataptr(mp,
(char *)dep - (char *)block));
/*
* Create entry for ..
*/
dep = (xfs_dir2_data_entry_t *)
((char *)block + XFS_DIR2_DATA_DOTDOT_OFFSET);
dep->inumber = cpu_to_be64(xfs_dir2_sf_get_inumber(sfp, &sfp->hdr.parent));
dep->namelen = 2;
dep->name[0] = dep->name[1] = '.';
tagp = xfs_dir2_data_entry_tag_p(dep);
*tagp = cpu_to_be16((char *)dep - (char *)block);
xfs_dir2_data_log_entry(tp, bp, dep);
blp[1].hashval = cpu_to_be32(xfs_dir_hash_dotdot);
blp[1].address = cpu_to_be32(xfs_dir2_byte_to_dataptr(mp,
(char *)dep - (char *)block));
offset = XFS_DIR2_DATA_FIRST_OFFSET;
/*
* Loop over existing entries, stuff them in.
*/
if ((i = 0) == sfp->hdr.count)
sfep = NULL;
else
sfep = xfs_dir2_sf_firstentry(sfp);
/*
* Need to preserve the existing offset values in the sf directory.
* Insert holes (unused entries) where necessary.
*/
while (offset < endoffset) {
/*
* sfep is null when we reach the end of the list.
*/
if (sfep == NULL)
newoffset = endoffset;
else
newoffset = xfs_dir2_sf_get_offset(sfep);
/*
* There should be a hole here, make one.
*/
if (offset < newoffset) {
dup = (xfs_dir2_data_unused_t *)
((char *)block + offset);
dup->freetag = cpu_to_be16(XFS_DIR2_DATA_FREE_TAG);
dup->length = cpu_to_be16(newoffset - offset);
*xfs_dir2_data_unused_tag_p(dup) = cpu_to_be16(
((char *)dup - (char *)block));
xfs_dir2_data_log_unused(tp, bp, dup);
(void)xfs_dir2_data_freeinsert((xfs_dir2_data_t *)block,
dup, &dummy);
offset += be16_to_cpu(dup->length);
continue;
}
/*
* Copy a real entry.
*/
dep = (xfs_dir2_data_entry_t *)((char *)block + newoffset);
dep->inumber = cpu_to_be64(xfs_dir2_sf_get_inumber(sfp,
xfs_dir2_sf_inumberp(sfep)));
dep->namelen = sfep->namelen;
memcpy(dep->name, sfep->name, dep->namelen);
tagp = xfs_dir2_data_entry_tag_p(dep);
*tagp = cpu_to_be16((char *)dep - (char *)block);
xfs_dir2_data_log_entry(tp, bp, dep);
name.name = sfep->name;
name.len = sfep->namelen;
blp[2 + i].hashval = cpu_to_be32(mp->m_dirnameops->
hashname(&name));
blp[2 + i].address = cpu_to_be32(xfs_dir2_byte_to_dataptr(mp,
(char *)dep - (char *)block));
offset = (int)((char *)(tagp + 1) - (char *)block);
if (++i == sfp->hdr.count)
sfep = NULL;
else
sfep = xfs_dir2_sf_nextentry(sfp, sfep);
}
/* Done with the temporary buffer */
kmem_free(buf);
/*
* Sort the leaf entries by hash value.
*/
xfs_sort(blp, be32_to_cpu(btp->count), sizeof(*blp), xfs_dir2_block_sort);
/*
* Log the leaf entry area and tail.
* Already logged the header in data_init, ignore needlog.
*/
ASSERT(needscan == 0);
xfs_dir2_block_log_leaf(tp, bp, 0, be32_to_cpu(btp->count) - 1);
xfs_dir2_block_log_tail(tp, bp);
xfs_dir2_data_check(dp, bp);
xfs_da_buf_done(bp);
return 0;
}
