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symlink: driver marshalls new SYMLINK upcall

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new NFS41_SYMLINK upcall and associated data in nfs41_updowncall_entry.u.Symlink
supports both setting and querying the symlink target.  if Symlink.set is TRUE, Symlink.target is marshalled into the upcall.  if Symlink.set is FALSE, Symlink.target is read from the downcall

Signed-off-by: Casey Bodley <cbodley@citi.umich.edu>
This commit is contained in:
Casey Bodley 2010-09-23 12:19:21 -04:00 • committed by unknown
parent b51bd2f9d1
commit 80d979ace6
3 changed files with 68 additions and 0 deletions
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66
sys/nfs41_driver.c
View file

@ -198,6 +198,13 @@ typedef struct _updowncall_entry {
HANDLE session;
DWORD mode;
} SetEa;
struct {
HANDLE open_state;
HANDLE session;
PUNICODE_STRING filename;
PUNICODE_STRING target;
BOOLEAN set;
} Symlink;
struct {
HANDLE session;
FS_INFORMATION_CLASS query;
@ -968,6 +975,49 @@ out:
return status;
}
NTSTATUS marshal_nfs41_symlink(nfs41_updowncall_entry *entry,
unsigned char *buf,
ULONG buf_len,
ULONG *len)
{
NTSTATUS status = STATUS_SUCCESS;
ULONG header_len = 0;
unsigned char *tmp = buf;
DbgEn();
status = marshal_nfs41_header(entry, tmp, buf_len, len);
if (status == STATUS_INSUFFICIENT_RESOURCES)
goto out;
else
tmp += *len;
header_len = *len + 2 * sizeof(HANDLE) + sizeof(BOOLEAN) +
length_as_ansi(entry->u.Symlink.filename);
if (entry->u.Symlink.set)
header_len += length_as_ansi(entry->u.Symlink.target);
if (header_len > buf_len) {
status = STATUS_INSUFFICIENT_RESOURCES;
goto out;
}
RtlCopyMemory(tmp, &entry->u.Symlink.session, sizeof(HANDLE));
tmp += sizeof(HANDLE);
RtlCopyMemory(tmp, &entry->u.Symlink.open_state, sizeof(HANDLE));
tmp += sizeof(HANDLE);
marshall_unicode_as_ansi(&tmp, entry->u.Symlink.filename);
RtlCopyMemory(tmp, &entry->u.Symlink.set, sizeof(BOOLEAN));
tmp += sizeof(BOOLEAN);
if (entry->u.Symlink.set)
marshall_unicode_as_ansi(&tmp, entry->u.Symlink.target);
*len = header_len;
DbgP("session=0x%x open_state=0x%x set=0x%x\n",
entry->u.SetEa.session, entry->u.SetEa.open_state, entry->u.SetEa.mode);
out:
DbgEx();
return status;
}
NTSTATUS marshal_nfs41_volume(nfs41_updowncall_entry *entry,
unsigned char *buf,
ULONG buf_len,
@ -1086,6 +1136,9 @@ handle_upcall(
case NFS41_EA_SET:
status = marshal_nfs41_easet(entry, pbOut, cbOut, len);
break;
case NFS41_SYMLINK:
status = marshal_nfs41_symlink(entry, pbOut, cbOut, len);
break;
case NFS41_VOLUME_QUERY:
status = marshal_nfs41_volume(entry, pbOut, cbOut, len);
break;
@ -1370,6 +1423,19 @@ nfs41_downcall (
RtlCopyMemory(&cur->u.QueryFile.readdir_cookie, buf, sizeof(HANDLE));
}
break;
case NFS41_SYMLINK:
if (cur->u.Symlink.set)
break;
RtlCopyMemory(&cur->u.Symlink.target->Length, buf, sizeof(USHORT));
buf += sizeof(USHORT);
if (cur->u.Symlink.target->Length > cur->u.Symlink.target->MaximumLength) {
cur->status = STATUS_BUFFER_TOO_SMALL;
break;
}
RtlCopyMemory(cur->u.Symlink.target->Buffer, buf,
cur->u.Symlink.target->Length);
cur->u.Symlink.target->Length -= sizeof(UNICODE_NULL);
break;
case NFS41_VOLUME_QUERY:
RtlCopyMemory(&tmp->u.Volume.buf_len, buf, sizeof(LONG));
buf += sizeof(LONG);