diff options
Diffstat (limited to 'fs/smb/server/oplock.c')
-rw-r--r-- | fs/smb/server/oplock.c | 161 |
1 files changed, 127 insertions, 34 deletions
diff --git a/fs/smb/server/oplock.c b/fs/smb/server/oplock.c index c81aee9ce7ec..1253e9bde34c 100644 --- a/fs/smb/server/oplock.c +++ b/fs/smb/server/oplock.c @@ -102,9 +102,10 @@ static int alloc_lease(struct oplock_info *opinfo, struct lease_ctx_info *lctx) lease->new_state = 0; lease->flags = lctx->flags; lease->duration = lctx->duration; + lease->is_dir = lctx->is_dir; memcpy(lease->parent_lease_key, lctx->parent_lease_key, SMB2_LEASE_KEY_SIZE); lease->version = lctx->version; - lease->epoch = 0; + lease->epoch = le16_to_cpu(lctx->epoch) + 1; INIT_LIST_HEAD(&opinfo->lease_entry); opinfo->o_lease = lease; @@ -395,8 +396,8 @@ void close_id_del_oplock(struct ksmbd_file *fp) { struct oplock_info *opinfo; - if (S_ISDIR(file_inode(fp->filp)->i_mode)) - return; + if (fp->reserve_lease_break) + smb_lazy_parent_lease_break_close(fp); opinfo = opinfo_get(fp); if (!opinfo) @@ -543,24 +544,30 @@ static struct oplock_info *same_client_has_lease(struct ksmbd_inode *ci, /* upgrading lease */ if ((atomic_read(&ci->op_count) + atomic_read(&ci->sop_count)) == 1) { - if (lease->state == - (lctx->req_state & lease->state)) { + if (lease->state != SMB2_LEASE_NONE_LE && + lease->state == (lctx->req_state & lease->state)) { + lease->epoch++; lease->state |= lctx->req_state; if (lctx->req_state & SMB2_LEASE_WRITE_CACHING_LE) lease_read_to_write(opinfo); + } } else if ((atomic_read(&ci->op_count) + atomic_read(&ci->sop_count)) > 1) { if (lctx->req_state == (SMB2_LEASE_READ_CACHING_LE | - SMB2_LEASE_HANDLE_CACHING_LE)) + SMB2_LEASE_HANDLE_CACHING_LE)) { + lease->epoch++; lease->state = lctx->req_state; + } } if (lctx->req_state && lease->state == - SMB2_LEASE_NONE_LE) + SMB2_LEASE_NONE_LE) { + lease->epoch++; lease_none_upgrade(opinfo, lctx->req_state); + } } read_lock(&ci->m_lock); } @@ -616,15 +623,6 @@ static int oplock_break_pending(struct oplock_info *opinfo, int req_op_level) return 0; } -static inline int allocate_oplock_break_buf(struct ksmbd_work *work) -{ - work->response_buf = kzalloc(MAX_CIFS_SMALL_BUFFER_SIZE, GFP_KERNEL); - if (!work->response_buf) - return -ENOMEM; - work->response_sz = MAX_CIFS_SMALL_BUFFER_SIZE; - return 0; -} - /** * __smb2_oplock_break_noti() - send smb2 oplock break cmd from conn * to client @@ -639,7 +637,6 @@ static void __smb2_oplock_break_noti(struct work_struct *wk) { struct smb2_oplock_break *rsp = NULL; struct ksmbd_work *work = container_of(wk, struct ksmbd_work, work); - struct ksmbd_conn *conn = work->conn; struct oplock_break_info *br_info = work->request_buf; struct smb2_hdr *rsp_hdr; struct ksmbd_file *fp; @@ -648,7 +645,7 @@ static void __smb2_oplock_break_noti(struct work_struct *wk) if (!fp) goto out; - if (allocate_oplock_break_buf(work)) { + if (allocate_interim_rsp_buf(work)) { pr_err("smb2_allocate_rsp_buf failed! "); ksmbd_fd_put(work, fp); goto out; @@ -656,8 +653,6 @@ static void __smb2_oplock_break_noti(struct work_struct *wk) rsp_hdr = smb2_get_msg(work->response_buf); memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); - *(__be32 *)work->response_buf = - cpu_to_be32(conn->vals->header_size); rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER; rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; rsp_hdr->CreditRequest = cpu_to_le16(0); @@ -684,13 +679,15 @@ static void __smb2_oplock_break_noti(struct work_struct *wk) rsp->PersistentFid = fp->persistent_id; rsp->VolatileFid = fp->volatile_id; - inc_rfc1001_len(work->response_buf, 24); + ksmbd_fd_put(work, fp); + if (ksmbd_iov_pin_rsp(work, (void *)rsp, + sizeof(struct smb2_oplock_break))) + goto out; ksmbd_debug(OPLOCK, "sending oplock break v_id %llu p_id = %llu lock level = %d\n", rsp->VolatileFid, rsp->PersistentFid, rsp->OplockLevel); - ksmbd_fd_put(work, fp); ksmbd_conn_write(work); out: @@ -751,18 +748,15 @@ static void __smb2_lease_break_noti(struct work_struct *wk) struct smb2_lease_break *rsp = NULL; struct ksmbd_work *work = container_of(wk, struct ksmbd_work, work); struct lease_break_info *br_info = work->request_buf; - struct ksmbd_conn *conn = work->conn; struct smb2_hdr *rsp_hdr; - if (allocate_oplock_break_buf(work)) { + if (allocate_interim_rsp_buf(work)) { ksmbd_debug(OPLOCK, "smb2_allocate_rsp_buf failed! "); goto out; } rsp_hdr = smb2_get_msg(work->response_buf); memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); - *(__be32 *)work->response_buf = - cpu_to_be32(conn->vals->header_size); rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER; rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; rsp_hdr->CreditRequest = cpu_to_le16(0); @@ -791,7 +785,9 @@ static void __smb2_lease_break_noti(struct work_struct *wk) rsp->AccessMaskHint = 0; rsp->ShareMaskHint = 0; - inc_rfc1001_len(work->response_buf, 44); + if (ksmbd_iov_pin_rsp(work, (void *)rsp, + sizeof(struct smb2_lease_break))) + goto out; ksmbd_conn_write(work); @@ -844,7 +840,8 @@ static int smb2_lease_break_noti(struct oplock_info *opinfo) interim_entry); setup_async_work(in_work, NULL, NULL); smb2_send_interim_resp(in_work, STATUS_PENDING); - list_del(&in_work->interim_entry); + list_del_init(&in_work->interim_entry); + release_async_work(in_work); } INIT_WORK(&work->work, __smb2_lease_break_noti); ksmbd_queue_work(work); @@ -910,7 +907,8 @@ static int oplock_break(struct oplock_info *brk_opinfo, int req_op_level) lease->new_state = SMB2_LEASE_READ_CACHING_LE; } else { - if (lease->state & SMB2_LEASE_HANDLE_CACHING_LE) + if (lease->state & SMB2_LEASE_HANDLE_CACHING_LE && + !lease->is_dir) lease->new_state = SMB2_LEASE_READ_CACHING_LE; else @@ -1042,6 +1040,8 @@ static void copy_lease(struct oplock_info *op1, struct oplock_info *op2) SMB2_LEASE_KEY_SIZE); lease2->duration = lease1->duration; lease2->flags = lease1->flags; + lease2->epoch = lease1->epoch; + lease2->version = lease1->version; } static int add_lease_global_list(struct oplock_info *opinfo) @@ -1091,6 +1091,89 @@ static void set_oplock_level(struct oplock_info *opinfo, int level, } } +void smb_send_parent_lease_break_noti(struct ksmbd_file *fp, + struct lease_ctx_info *lctx) +{ + struct oplock_info *opinfo; + struct ksmbd_inode *p_ci = NULL; + + if (lctx->version != 2) + return; + + p_ci = ksmbd_inode_lookup_lock(fp->filp->f_path.dentry->d_parent); + if (!p_ci) + return; + + read_lock(&p_ci->m_lock); + list_for_each_entry(opinfo, &p_ci->m_op_list, op_entry) { + if (!opinfo->is_lease) + continue; + + if (opinfo->o_lease->state != SMB2_OPLOCK_LEVEL_NONE && + (!(lctx->flags & SMB2_LEASE_FLAG_PARENT_LEASE_KEY_SET_LE) || + !compare_guid_key(opinfo, fp->conn->ClientGUID, + lctx->parent_lease_key))) { + if (!atomic_inc_not_zero(&opinfo->refcount)) + continue; + + atomic_inc(&opinfo->conn->r_count); + if (ksmbd_conn_releasing(opinfo->conn)) { + atomic_dec(&opinfo->conn->r_count); + continue; + } + + read_unlock(&p_ci->m_lock); + oplock_break(opinfo, SMB2_OPLOCK_LEVEL_NONE); + opinfo_conn_put(opinfo); + read_lock(&p_ci->m_lock); + } + } + read_unlock(&p_ci->m_lock); + + ksmbd_inode_put(p_ci); +} + +void smb_lazy_parent_lease_break_close(struct ksmbd_file *fp) +{ + struct oplock_info *opinfo; + struct ksmbd_inode *p_ci = NULL; + + rcu_read_lock(); + opinfo = rcu_dereference(fp->f_opinfo); + rcu_read_unlock(); + + if (!opinfo->is_lease || opinfo->o_lease->version != 2) + return; + + p_ci = ksmbd_inode_lookup_lock(fp->filp->f_path.dentry->d_parent); + if (!p_ci) + return; + + read_lock(&p_ci->m_lock); + list_for_each_entry(opinfo, &p_ci->m_op_list, op_entry) { + if (!opinfo->is_lease) + continue; + + if (opinfo->o_lease->state != SMB2_OPLOCK_LEVEL_NONE) { + if (!atomic_inc_not_zero(&opinfo->refcount)) + continue; + + atomic_inc(&opinfo->conn->r_count); + if (ksmbd_conn_releasing(opinfo->conn)) { + atomic_dec(&opinfo->conn->r_count); + continue; + } + read_unlock(&p_ci->m_lock); + oplock_break(opinfo, SMB2_OPLOCK_LEVEL_NONE); + opinfo_conn_put(opinfo); + read_lock(&p_ci->m_lock); + } + } + read_unlock(&p_ci->m_lock); + + ksmbd_inode_put(p_ci); +} + /** * smb_grant_oplock() - handle oplock/lease request on file open * @work: smb work @@ -1114,9 +1197,11 @@ int smb_grant_oplock(struct ksmbd_work *work, int req_op_level, u64 pid, bool prev_op_has_lease; __le32 prev_op_state = 0; - /* not support directory lease */ - if (S_ISDIR(file_inode(fp->filp)->i_mode)) - return 0; + /* Only v2 leases handle the directory */ + if (S_ISDIR(file_inode(fp->filp)->i_mode)) { + if (!lctx || lctx->version != 2) + return 0; + } opinfo = alloc_opinfo(work, pid, tid); if (!opinfo) @@ -1374,6 +1459,7 @@ void create_lease_buf(u8 *rbuf, struct lease *lease) memcpy(buf->lcontext.LeaseKey, lease->lease_key, SMB2_LEASE_KEY_SIZE); buf->lcontext.LeaseFlags = lease->flags; + buf->lcontext.Epoch = cpu_to_le16(lease->epoch); buf->lcontext.LeaseState = lease->state; memcpy(buf->lcontext.ParentLeaseKey, lease->parent_lease_key, SMB2_LEASE_KEY_SIZE); @@ -1410,10 +1496,11 @@ void create_lease_buf(u8 *rbuf, struct lease *lease) /** * parse_lease_state() - parse lease context containted in file open request * @open_req: buffer containing smb2 file open(create) request + * @is_dir: whether leasing file is directory * * Return: oplock state, -ENOENT if create lease context not found */ -struct lease_ctx_info *parse_lease_state(void *open_req) +struct lease_ctx_info *parse_lease_state(void *open_req, bool is_dir) { struct create_context *cc; struct smb2_create_req *req = (struct smb2_create_req *)open_req; @@ -1431,8 +1518,14 @@ struct lease_ctx_info *parse_lease_state(void *open_req) struct create_lease_v2 *lc = (struct create_lease_v2 *)cc; memcpy(lreq->lease_key, lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE); - lreq->req_state = lc->lcontext.LeaseState; + if (is_dir) { + lreq->req_state = lc->lcontext.LeaseState & + ~SMB2_LEASE_WRITE_CACHING_LE; + lreq->is_dir = true; + } else + lreq->req_state = lc->lcontext.LeaseState; lreq->flags = lc->lcontext.LeaseFlags; + lreq->epoch = lc->lcontext.Epoch; lreq->duration = lc->lcontext.LeaseDuration; memcpy(lreq->parent_lease_key, lc->lcontext.ParentLeaseKey, SMB2_LEASE_KEY_SIZE); |