diff options
Diffstat (limited to 'fs/afs/yfsclient.c')
| -rw-r--r-- | fs/afs/yfsclient.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/fs/afs/yfsclient.c b/fs/afs/yfsclient.c index 055840aa07f6..13eafa764d71 100644 --- a/fs/afs/yfsclient.c +++ b/fs/afs/yfsclient.c @@ -2204,3 +2204,191 @@ int yfs_fs_inline_bulk_status(struct afs_fs_cursor *fc, afs_make_call(&fc->ac, call, GFP_NOFS); return afs_wait_for_call_to_complete(call, &fc->ac); } + +/* + * Deliver reply data to an YFS.FetchOpaqueACL. + */ +static int yfs_deliver_fs_fetch_opaque_acl(struct afs_call *call) +{ + struct afs_volsync *volsync = call->reply[2]; + struct afs_vnode *vnode = call->reply[1]; + struct yfs_acl *yacl = call->reply[0]; + struct afs_acl *acl; + const __be32 *bp; + unsigned int size; + int ret; + + _enter("{%u}", call->unmarshall); + + switch (call->unmarshall) { + case 0: + afs_extract_to_tmp(call); + call->unmarshall++; + + /* Extract the file ACL length */ + case 1: + ret = afs_extract_data(call, true); + if (ret < 0) + return ret; + + size = call->count2 = ntohl(call->tmp); + size = round_up(size, 4); + + if (yacl->flags & YFS_ACL_WANT_ACL) { + acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL); + if (!acl) + return -ENOMEM; + yacl->acl = acl; + acl->size = call->count2; + afs_extract_begin(call, acl->data, size); + } else { + iov_iter_discard(&call->iter, READ, size); + } + call->unmarshall++; + + /* Extract the file ACL */ + case 2: + ret = afs_extract_data(call, true); + if (ret < 0) + return ret; + + afs_extract_to_tmp(call); + call->unmarshall++; + + /* Extract the volume ACL length */ + case 3: + ret = afs_extract_data(call, true); + if (ret < 0) + return ret; + + size = call->count2 = ntohl(call->tmp); + size = round_up(size, 4); + + if (yacl->flags & YFS_ACL_WANT_VOL_ACL) { + acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL); + if (!acl) + return -ENOMEM; + yacl->vol_acl = acl; + acl->size = call->count2; + afs_extract_begin(call, acl->data, size); + } else { + iov_iter_discard(&call->iter, READ, size); + } + call->unmarshall++; + + /* Extract the volume ACL */ + case 4: + ret = afs_extract_data(call, true); + if (ret < 0) + return ret; + + afs_extract_to_buf(call, + sizeof(__be32) * 2 + + sizeof(struct yfs_xdr_YFSFetchStatus) + + sizeof(struct yfs_xdr_YFSVolSync)); + call->unmarshall++; + + /* extract the metadata */ + case 5: + ret = afs_extract_data(call, false); + if (ret < 0) + return ret; + + bp = call->buffer; + yacl->inherit_flag = ntohl(*bp++); + yacl->num_cleaned = ntohl(*bp++); + ret = yfs_decode_status(call, &bp, &vnode->status, vnode, + &call->expected_version, NULL); + if (ret < 0) + return ret; + xdr_decode_YFSVolSync(&bp, volsync); + + call->unmarshall++; + + case 6: + break; + } + + _leave(" = 0 [done]"); + return 0; +} + +void yfs_free_opaque_acl(struct yfs_acl *yacl) +{ + if (yacl) { + kfree(yacl->acl); + kfree(yacl->vol_acl); + kfree(yacl); + } +} + +static void yfs_destroy_fs_fetch_opaque_acl(struct afs_call *call) +{ + yfs_free_opaque_acl(call->reply[0]); + afs_flat_call_destructor(call); +} + +/* + * YFS.FetchOpaqueACL operation type + */ +static const struct afs_call_type yfs_RXYFSFetchOpaqueACL = { + .name = "YFS.FetchOpaqueACL", + .op = yfs_FS_FetchOpaqueACL, + .deliver = yfs_deliver_fs_fetch_opaque_acl, + .destructor = yfs_destroy_fs_fetch_opaque_acl, +}; + +/* + * Fetch the YFS advanced ACLs for a file. + */ +struct yfs_acl *yfs_fs_fetch_opaque_acl(struct afs_fs_cursor *fc, + unsigned int flags) +{ + struct afs_vnode *vnode = fc->vnode; + struct afs_call *call; + struct yfs_acl *yacl; + struct afs_net *net = afs_v2net(vnode); + __be32 *bp; + + _enter(",%x,{%llx:%llu},,", + key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode); + + call = afs_alloc_flat_call(net, &yfs_RXYFSFetchOpaqueACL, + sizeof(__be32) * 2 + + sizeof(struct yfs_xdr_YFSFid), + sizeof(__be32) * 2 + + sizeof(struct yfs_xdr_YFSFetchStatus) + + sizeof(struct yfs_xdr_YFSVolSync)); + if (!call) + goto nomem; + + yacl = kzalloc(sizeof(struct yfs_acl), GFP_KERNEL); + if (!yacl) + goto nomem_call; + + yacl->flags = flags; + call->key = fc->key; + call->reply[0] = yacl; + call->reply[1] = vnode; + call->reply[2] = NULL; /* volsync */ + call->ret_reply0 = true; + + /* marshall the parameters */ + bp = call->request; + bp = xdr_encode_u32(bp, YFSFETCHOPAQUEACL); + bp = xdr_encode_u32(bp, 0); /* RPC flags */ + bp = xdr_encode_YFSFid(bp, &vnode->fid); + yfs_check_req(call, bp); + + call->cb_break = fc->cb_break; + afs_use_fs_server(call, fc->cbi); + trace_afs_make_fs_call(call, &vnode->fid); + afs_make_call(&fc->ac, call, GFP_KERNEL); + return (struct yfs_acl *)afs_wait_for_call_to_complete(call, &fc->ac); + +nomem_call: + afs_put_call(call); +nomem: + fc->ac.error = -ENOMEM; + return ERR_PTR(-ENOMEM); +} |