/*
* Calculate how many blocks we need for the new attribute,
*/
STATIC int
xfs_attr_calc_size(
struct xfs_da_args *args,
int *local)
{
struct xfs_mount *mp = args->dp->i_mount;
int size;
int nblks;
/*
* Determine space new attribute will use, and if it would be
* "local" or "remote" (note: local != inline).
*/
size = xfs_attr_leaf_newentsize(args, local);
nblks = XFS_DAENTER_SPACE_RES(mp, XFS_ATTR_FORK);
if (*local) {
if (size > (args->geo->blksize / 2)) {
/* Double split possible */
nblks *= 2;
}
} else {
/*
* Out of line attribute, cannot double split, but
* make room for the attribute value itself.
*/
uint dblocks = xfs_attr3_rmt_blocks(mp, args->valuelen);
nblks += dblocks;
nblks += XFS_NEXTENTADD_SPACE_RES(mp, dblocks, XFS_ATTR_FORK);
}
return nblks;
}
/*
* Calculate the maximum length in bytes that would be required for a local
* attribute value as large attributes out of line are not logged.
*/
STATIC int
xfs_log_calc_max_attrsetm_res(
struct xfs_mount *mp)
{
int size;
int nblks;
size = xfs_attr_leaf_entsize_local_max(mp->m_sb.sb_blocksize) -
MAXNAMELEN - 1;
nblks = XFS_DAENTER_SPACE_RES(mp, XFS_ATTR_FORK);
nblks += XFS_B_TO_FSB(mp, size);
nblks += XFS_NEXTENTADD_SPACE_RES(mp, size, XFS_ATTR_FORK);
return M_RES(mp)->tr_attrsetm.tr_logres +
M_RES(mp)->tr_attrsetrt.tr_logres * nblks;
}
static int
max_trans_res(
xfs_mount_t *mp,
int *mul)
{
uint *p;
uint *q;
int rval;
xfs_trans_reservations_t *tr;
xfs_da_args_t args;
int local;
int size;
int nblks;
int res;
nblks = XFS_DAENTER_SPACE_RES(mp, XFS_ATTR_FORK);
/*
* Fill in the arg structure for this request.
*/
bzero(&args, sizeof(args));
args.name = NULL;
args.namelen = MAXNAMELEN;
args.value = NULL;
args.valuelen = 65536;
args.flags = 0;
args.hashval = 0;
args.dp = NULL;
args.firstblock = NULL;
args.flist = NULL;
args.whichfork = XFS_ATTR_FORK;
args.oknoent = 1;
/*
* Determine space new attribute will use, and if it will be
* inline or out of line.
*/
size = libxfs_attr_leaf_newentsize(
&args, mp->m_sb.sb_blocksize, &local);
if (local) {
printf("Uh-oh.. attribute is local\n");
} else {
/* Out of line attribute, cannot double split, but make
* room for the attribute value itself.
*/
nblks += XFS_B_TO_FSB(mp, size);
nblks += XFS_NEXTENTADD_SPACE_RES(mp, size, XFS_ATTR_FORK);
}
res = XFS_ATTRSET_LOG_RES(mp, nblks);
#if 0
printf("size = %d nblks = %d res = %d\n", size, nblks, res);
#endif
mp->m_reservations.tr_attrset = res;
for (rval = 0, tr = &mp->m_reservations, p = (uint *)tr,
q = (uint *)&tr_count;
p < (uint *)(tr + 1);
p++, q++) {
if ((int)*p > rval) {
rval = (int)*p;
*mul = (int)*q;
}
}
return rval;
}
