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afs: Implement YFS ACL setting

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Implement the setting of YFS ACLs in AFS through the interface of setting
the afs.yfs.acl extended attribute on the file.

Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells
2019-05-01 14:05:27 +01:00
parent ae46578b96
commit f5e4546347
3 changed files with 112 additions and 5 deletions
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67
fs/afs/yfsclient.c
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@@ -1768,9 +1768,10 @@ int yfs_fs_get_volume_status(struct afs_fs_cursor *fc,
}
/*
* Deliver reply data to an YFS.SetLock, YFS.ExtendLock or YFS.ReleaseLock
* Deliver reply data to operations that just return a file status and a volume
* sync record.
*/
static int yfs_deliver_fs_xxxx_lock(struct afs_call *call)
static int yfs_deliver_status_and_volsync(struct afs_call *call)
{
struct afs_vnode *vnode = call->reply[0];
const __be32 *bp;
@@ -1800,7 +1801,7 @@ static int yfs_deliver_fs_xxxx_lock(struct afs_call *call)
static const struct afs_call_type yfs_RXYFSSetLock = {
.name = "YFS.SetLock",
.op = yfs_FS_SetLock,
.deliver = yfs_deliver_fs_xxxx_lock,
.deliver = yfs_deliver_status_and_volsync,
.done = afs_lock_op_done,
.destructor = afs_flat_call_destructor,
};
@@ -1811,7 +1812,7 @@ static const struct afs_call_type yfs_RXYFSSetLock = {
static const struct afs_call_type yfs_RXYFSExtendLock = {
.name = "YFS.ExtendLock",
.op = yfs_FS_ExtendLock,
.deliver = yfs_deliver_fs_xxxx_lock,
.deliver = yfs_deliver_status_and_volsync,
.done = afs_lock_op_done,
.destructor = afs_flat_call_destructor,
};
@@ -1822,7 +1823,7 @@ static const struct afs_call_type yfs_RXYFSExtendLock = {
static const struct afs_call_type yfs_RXYFSReleaseLock = {
.name = "YFS.ReleaseLock",
.op = yfs_FS_ReleaseLock,
.deliver = yfs_deliver_fs_xxxx_lock,
.deliver = yfs_deliver_status_and_volsync,
.destructor = afs_flat_call_destructor,
};
@@ -2392,3 +2393,59 @@ nomem:
fc->ac.error = -ENOMEM;
return ERR_PTR(-ENOMEM);
}
/*
* YFS.StoreOpaqueACL2 operation type
*/
static const struct afs_call_type yfs_RXYFSStoreOpaqueACL2 = {
.name = "YFS.StoreOpaqueACL2",
.op = yfs_FS_StoreOpaqueACL2,
.deliver = yfs_deliver_status_and_volsync,
.destructor = afs_flat_call_destructor,
};
/*
* Fetch the YFS ACL for a file.
*/
int yfs_fs_store_opaque_acl2(struct afs_fs_cursor *fc, const struct afs_acl *acl)
{
struct afs_vnode *vnode = fc->vnode;
struct afs_call *call;
struct afs_net *net = afs_v2net(vnode);
size_t size;
__be32 *bp;
_enter(",%x,{%llx:%llu},,",
key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
size = round_up(acl->size, 4);
call = afs_alloc_flat_call(net, &yfs_RXYFSStoreStatus,
sizeof(__be32) * 2 +
sizeof(struct yfs_xdr_YFSFid) +
sizeof(__be32) + size,
sizeof(struct yfs_xdr_YFSFetchStatus) +
sizeof(struct yfs_xdr_YFSVolSync));
if (!call) {
fc->ac.error = -ENOMEM;
return -ENOMEM;
}
call->key = fc->key;
call->reply[0] = vnode;
call->reply[2] = NULL; /* volsync */
/* marshall the parameters */
bp = call->request;
bp = xdr_encode_u32(bp, YFSSTOREOPAQUEACL2);
bp = xdr_encode_u32(bp, 0); /* RPC flags */
bp = xdr_encode_YFSFid(bp, &vnode->fid);
bp = xdr_encode_u32(bp, acl->size);
memcpy(bp, acl->data, acl->size);
if (acl->size != size)
memset((void *)bp + acl->size, 0, size - acl->size);
yfs_check_req(call, bp);
trace_afs_make_fs_call(call, &vnode->fid);
afs_make_call(&fc->ac, call, GFP_KERNEL);
return afs_wait_for_call_to_complete(call, &fc->ac);
}