/*===========================================================================*
* fs_utime *
*===========================================================================*/
PUBLIC int fs_utime()
{
struct puffs_node *pn;
struct vattr va;
PUFFS_MAKECRED(pcr, &global_kcred);
if (is_readonly_fs)
return(EROFS);
if (global_pu->pu_ops.puffs_node_setattr == NULL)
return(EINVAL);
if( (pn = puffs_pn_nodewalk(global_pu, 0, &fs_m_in.REQ_INODE_NR)) == NULL)
return(EINVAL);
puffs_vattr_null(&va);
va.va_atime.tv_nsec = va.va_mtime.tv_nsec = va.va_ctime.tv_nsec = 0;
va.va_atime.tv_sec = fs_m_in.REQ_ACTIME;
va.va_mtime.tv_sec = fs_m_in.REQ_MODTIME;
va.va_ctime.tv_sec = clock_time();
if (global_pu->pu_ops.puffs_node_setattr(global_pu, pn, &va, pcr) != 0)
return(EINVAL);
return(OK);
}
/*===========================================================================*
* fs_ftrunc *
*===========================================================================*/
PUBLIC int fs_ftrunc(void)
{
int r;
struct puffs_node *pn;
off_t start, end;
PUFFS_MAKECRED(pcr, &global_kcred);
if ((pn = puffs_pn_nodewalk(global_pu, 0, &fs_m_in.REQ_INODE_NR)) == NULL)
return(EINVAL);
start = fs_m_in.REQ_TRC_START_LO;
end = fs_m_in.REQ_TRC_END_LO;
if (end == 0) {
struct vattr va;
if (pn->pn_va.va_size == start)
return(OK);
if (global_pu->pu_ops.puffs_node_setattr == NULL)
return(EINVAL);
puffs_vattr_null(&va);
va.va_size = start;
r = global_pu->pu_ops.puffs_node_setattr(global_pu, pn, &va, pcr);
if (r) return(EINVAL);
} else {
/* XXX zerofill the given region. Can we make a hole? */
off_t bytes_left = end - start;
char* rw_buf;
if (global_pu->pu_ops.puffs_node_write == NULL)
return(EINVAL);
/* XXX split into chunks? */
rw_buf = malloc(bytes_left);
if (!rw_buf)
panic("fs_ftrunc: failed to allocated memory\n");
memset(rw_buf, 0, bytes_left);
r = global_pu->pu_ops.puffs_node_write(global_pu, pn, (uint8_t *)rw_buf,
start, (size_t *) &bytes_left, pcr, 0);
free(rw_buf);
if (r) return(EINVAL);
}
update_times(pn, CTIME | MTIME, 0);
return(r);
}
int
psbuf_get_vattr(struct puffs_framebuf *pb, struct vattr *vap)
{
uint32_t flags;
uint32_t val;
uint32_t tmpval;
puffs_vattr_null(vap);
FAILRV(psbuf_get_4(pb, &flags));
if (flags & SSH_FILEXFER_ATTR_SIZE) {
FAILRV(psbuf_get_8(pb, &vap->va_size));
vap->va_bytes = vap->va_size;
}
if (flags & SSH_FILEXFER_ATTR_UIDGID) {
FAILRV(psbuf_get_4(pb, &vap->va_uid));
FAILRV(psbuf_get_4(pb, &vap->va_gid));
}
if (flags & SSH_FILEXFER_ATTR_PERMISSIONS) {
FAILRV(psbuf_get_4(pb, &tmpval));
vap->va_mode = tmpval;
vap->va_type = puffs_mode2vt(vap->va_mode);
}
if (flags & SSH_FILEXFER_ATTR_ACCESSTIME) {
/*
* XXX: this is utterly wrong if we want to speak
* protocol version 3, but it seems like the
* "internet standard" for doing this
*/
FAILRV(psbuf_get_4(pb, &val));
vap->va_atime.tv_sec = val;
FAILRV(psbuf_get_4(pb, &val));
vap->va_mtime.tv_sec = val;
/* make ctime the same as mtime */
vap->va_ctime.tv_sec = val;
vap->va_atime.tv_nsec = 0;
vap->va_ctime.tv_nsec = 0;
vap->va_mtime.tv_nsec = 0;
}
return 0;
}
/*
* Well, you're probably wondering why this isn't optimized.
* The reason is simple: my available time is not optimized for
* size ... so please be patient ;)
*/
struct puffs_node *
puffs_pn_new(struct puffs_usermount *pu, void *privdata)
{
struct puffs_node *pn;
pn = calloc(1, sizeof(struct puffs_node));
if (pn == NULL)
return NULL;
pn->pn_data = privdata;
pn->pn_mnt = pu;
puffs_vattr_null(&pn->pn_va);
LIST_INSERT_HEAD(&pu->pu_pnodelst, pn, pn_entries);
pu->pu_flags |= PUFFS_FLAG_PNCOOKIE;
return pn;
}
struct psshfs_dir *
direnter(struct puffs_node *parent, const char *entryname)
{
struct psshfs_node *psn_parent = parent->pn_data;
struct psshfs_dir *pd;
int i;
/* create directory entry */
if (psn_parent->denttot == psn_parent->dentnext)
allocdirs(psn_parent);
i = psn_parent->dentnext;
pd = &psn_parent->dir[i];
pd->entryname = estrdup(entryname);
pd->valid = 1;
pd->attrread = 0;
puffs_vattr_null(&pd->va);
psn_parent->dentnext++;
return pd;
}
/*===========================================================================*
* fs_readwrite *
*===========================================================================*/
PUBLIC int fs_readwrite(void)
{
int r = OK, rw_flag;
cp_grant_id_t gid;
off_t pos;
size_t nrbytes, bytes_left, bytes_done;
struct puffs_node *pn;
struct vattr va;
PUFFS_MAKECRED(pcr, &global_kcred);
if ((pn = puffs_pn_nodewalk(global_pu, 0, &fs_m_in.REQ_INODE_NR)) == NULL) {
lpuffs_debug("walk failed...\n");
return(EINVAL);
}
/* Get the values from the request message */
rw_flag = (fs_m_in.m_type == REQ_READ ? READING : WRITING);
gid = (cp_grant_id_t) fs_m_in.REQ_GRANT;
pos = (off_t) fs_m_in.REQ_SEEK_POS_LO;
nrbytes = bytes_left = (size_t) fs_m_in.REQ_NBYTES;
if (nrbytes > RW_BUFSIZ)
nrbytes = bytes_left = RW_BUFSIZ;
memset(getdents_buf, '\0', RW_BUFSIZ); /* Avoid leaking any data */
if (rw_flag == READING) {
if (global_pu->pu_ops.puffs_node_read == NULL)
return(EINVAL);
r = global_pu->pu_ops.puffs_node_read(global_pu, pn, (uint8_t *)rw_buf,
pos, &bytes_left, pcr, 0);
if (r) {
lpuffs_debug("puffs_node_read failed\n");
return(EINVAL);
}
bytes_done = nrbytes - bytes_left;
if (bytes_done) {
r = sys_safecopyto(VFS_PROC_NR, gid, (vir_bytes) 0,
(vir_bytes) rw_buf, bytes_done, D);
update_times(pn, ATIME, 0);
}
} else if (rw_flag == WRITING) {
/* At first try to change vattr */
if (global_pu->pu_ops.puffs_node_setattr == NULL)
return(EINVAL);
puffs_vattr_null(&va);
if ( (pos + bytes_left) > pn->pn_va.va_size)
va.va_size = bytes_left + pos;
va.va_ctime.tv_sec = va.va_mtime.tv_sec = clock_time();
va.va_atime.tv_sec = pn->pn_va.va_atime.tv_sec;
r = global_pu->pu_ops.puffs_node_setattr(global_pu, pn, &va, pcr);
if (r) return(EINVAL);
r = sys_safecopyfrom(VFS_PROC_NR, gid, (vir_bytes) 0,
(vir_bytes) rw_buf, nrbytes, D);
if (r != OK) return(EINVAL);
if (global_pu->pu_ops.puffs_node_write == NULL)
return(EINVAL);
r = global_pu->pu_ops.puffs_node_write(global_pu, pn, (uint8_t *)rw_buf,
pos, &bytes_left, pcr, 0);
bytes_done = nrbytes - bytes_left;
}
if (r != OK) return(EINVAL);
fs_m_out.RES_SEEK_POS_LO = pos + bytes_done;
fs_m_out.RES_NBYTES = bytes_done;
return(r);
}
