diff options
Diffstat (limited to 'fs/smb/client/file.c')
-rw-r--r-- | fs/smb/client/file.c | 212 |
1 files changed, 106 insertions, 106 deletions
diff --git a/fs/smb/client/file.c b/fs/smb/client/file.c index 9d5c2440abfc..78b59c4ef3ce 100644 --- a/fs/smb/client/file.c +++ b/fs/smb/client/file.c @@ -49,6 +49,7 @@ static void cifs_prepare_write(struct netfs_io_subrequest *subreq) struct cifs_io_subrequest *wdata = container_of(subreq, struct cifs_io_subrequest, subreq); struct cifs_io_request *req = wdata->req; + struct netfs_io_stream *stream = &req->rreq.io_streams[subreq->stream_nr]; struct TCP_Server_Info *server; struct cifsFileInfo *open_file = req->cfile; size_t wsize = req->rreq.wsize; @@ -73,16 +74,26 @@ retry: } } - rc = server->ops->wait_mtu_credits(server, wsize, &wdata->subreq.max_len, + rc = server->ops->wait_mtu_credits(server, wsize, &stream->sreq_max_len, &wdata->credits); if (rc < 0) { subreq->error = rc; return netfs_prepare_write_failed(subreq); } + wdata->credits.rreq_debug_id = subreq->rreq->debug_id; + wdata->credits.rreq_debug_index = subreq->debug_index; + wdata->credits.in_flight_check = 1; + trace_smb3_rw_credits(wdata->rreq->debug_id, + wdata->subreq.debug_index, + wdata->credits.value, + server->credits, server->in_flight, + wdata->credits.value, + cifs_trace_rw_credits_write_prepare); + #ifdef CONFIG_CIFS_SMB_DIRECT if (server->smbd_conn) - subreq->max_nr_segs = server->smbd_conn->max_frmr_depth; + stream->sreq_max_segs = server->smbd_conn->max_frmr_depth; #endif } @@ -101,7 +112,7 @@ static void cifs_issue_write(struct netfs_io_subrequest *subreq) goto fail; } - rc = adjust_credits(wdata->server, &wdata->credits, wdata->subreq.len); + rc = adjust_credits(wdata->server, wdata, cifs_trace_rw_credits_issue_write_adjust); if (rc) goto fail; @@ -123,28 +134,28 @@ fail: goto out; } +static void cifs_netfs_invalidate_cache(struct netfs_io_request *wreq) +{ + cifs_invalidate_cache(wreq->inode, 0); +} + /* - * Split the read up according to how many credits we can get for each piece. - * It's okay to sleep here if we need to wait for more credit to become - * available. - * - * We also choose the server and allocate an operation ID to be cleaned up - * later. + * Negotiate the size of a read operation on behalf of the netfs library. */ -static bool cifs_clamp_length(struct netfs_io_subrequest *subreq) +static int cifs_prepare_read(struct netfs_io_subrequest *subreq) { struct netfs_io_request *rreq = subreq->rreq; - struct TCP_Server_Info *server; struct cifs_io_subrequest *rdata = container_of(subreq, struct cifs_io_subrequest, subreq); struct cifs_io_request *req = container_of(subreq->rreq, struct cifs_io_request, rreq); + struct TCP_Server_Info *server = req->server; struct cifs_sb_info *cifs_sb = CIFS_SB(rreq->inode->i_sb); - size_t rsize = 0; - int rc; - - rdata->xid = get_xid(); - rdata->have_xid = true; + size_t size; + int rc = 0; - server = cifs_pick_channel(tlink_tcon(req->cfile->tlink)->ses); + if (!rdata->have_xid) { + rdata->xid = get_xid(); + rdata->have_xid = true; + } rdata->server = server; if (cifs_sb->ctx->rsize == 0) @@ -152,20 +163,28 @@ static bool cifs_clamp_length(struct netfs_io_subrequest *subreq) server->ops->negotiate_rsize(tlink_tcon(req->cfile->tlink), cifs_sb->ctx); + rc = server->ops->wait_mtu_credits(server, cifs_sb->ctx->rsize, + &size, &rdata->credits); + if (rc) + return rc; - rc = server->ops->wait_mtu_credits(server, cifs_sb->ctx->rsize, &rsize, - &rdata->credits); - if (rc) { - subreq->error = rc; - return false; - } + rreq->io_streams[0].sreq_max_len = size; + + rdata->credits.in_flight_check = 1; + rdata->credits.rreq_debug_id = rreq->debug_id; + rdata->credits.rreq_debug_index = subreq->debug_index; + + trace_smb3_rw_credits(rdata->rreq->debug_id, + rdata->subreq.debug_index, + rdata->credits.value, + server->credits, server->in_flight, 0, + cifs_trace_rw_credits_read_submit); - subreq->len = min_t(size_t, subreq->len, rsize); #ifdef CONFIG_CIFS_SMB_DIRECT if (server->smbd_conn) - subreq->max_nr_segs = server->smbd_conn->max_frmr_depth; + rreq->io_streams[0].sreq_max_segs = server->smbd_conn->max_frmr_depth; #endif - return true; + return 0; } /* @@ -174,46 +193,41 @@ static bool cifs_clamp_length(struct netfs_io_subrequest *subreq) * to only read a portion of that, but as long as we read something, the netfs * helper will call us again so that we can issue another read. */ -static void cifs_req_issue_read(struct netfs_io_subrequest *subreq) +static void cifs_issue_read(struct netfs_io_subrequest *subreq) { struct netfs_io_request *rreq = subreq->rreq; struct cifs_io_subrequest *rdata = container_of(subreq, struct cifs_io_subrequest, subreq); struct cifs_io_request *req = container_of(subreq->rreq, struct cifs_io_request, rreq); - struct cifs_sb_info *cifs_sb = CIFS_SB(rreq->inode->i_sb); - pid_t pid; + struct TCP_Server_Info *server = req->server; int rc = 0; - if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD) - pid = req->cfile->pid; - else - pid = current->tgid; // Ummm... This may be a workqueue - cifs_dbg(FYI, "%s: op=%08x[%x] mapping=%p len=%zu/%zu\n", __func__, rreq->debug_id, subreq->debug_index, rreq->mapping, subreq->transferred, subreq->len); + rc = adjust_credits(server, rdata, cifs_trace_rw_credits_issue_read_adjust); + if (rc) + goto failed; + if (req->cfile->invalidHandle) { do { rc = cifs_reopen_file(req->cfile, true); } while (rc == -EAGAIN); if (rc) - goto out; + goto failed; } - __set_bit(NETFS_SREQ_CLEAR_TAIL, &subreq->flags); - rdata->pid = pid; - - rc = adjust_credits(rdata->server, &rdata->credits, rdata->subreq.len); - if (!rc) { - if (rdata->req->cfile->invalidHandle) - rc = -EAGAIN; - else - rc = rdata->server->ops->async_readv(rdata); - } + if (subreq->rreq->origin != NETFS_DIO_READ) + __set_bit(NETFS_SREQ_CLEAR_TAIL, &subreq->flags); -out: + trace_netfs_sreq(subreq, netfs_sreq_trace_submit); + rc = rdata->server->ops->async_readv(rdata); if (rc) - netfs_subreq_terminated(subreq, rc, false); + goto failed; + return; + +failed: + netfs_read_subreq_terminated(subreq, rc, false); } /* @@ -245,11 +259,15 @@ static int cifs_init_request(struct netfs_io_request *rreq, struct file *file) rreq->rsize = cifs_sb->ctx->rsize; rreq->wsize = cifs_sb->ctx->wsize; + req->pid = current->tgid; // Ummm... This may be a workqueue if (file) { open_file = file->private_data; rreq->netfs_priv = file->private_data; req->cfile = cifsFileInfo_get(open_file); + req->server = cifs_pick_channel(tlink_tcon(req->cfile->tlink)->ses); + if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD) + req->pid = req->cfile->pid; } else if (rreq->origin != NETFS_WRITEBACK) { WARN_ON_ONCE(1); return -EIO; @@ -259,35 +277,6 @@ static int cifs_init_request(struct netfs_io_request *rreq, struct file *file) } /* - * Expand the size of a readahead to the size of the rsize, if at least as - * large as a page, allowing for the possibility that rsize is not pow-2 - * aligned. - */ -static void cifs_expand_readahead(struct netfs_io_request *rreq) -{ - unsigned int rsize = rreq->rsize; - loff_t misalignment, i_size = i_size_read(rreq->inode); - - if (rsize < PAGE_SIZE) - return; - - if (rsize < INT_MAX) - rsize = roundup_pow_of_two(rsize); - else - rsize = ((unsigned int)INT_MAX + 1) / 2; - - misalignment = rreq->start & (rsize - 1); - if (misalignment) { - rreq->start -= misalignment; - rreq->len += misalignment; - } - - rreq->len = round_up(rreq->len, rsize); - if (rreq->start < i_size && rreq->len > i_size - rreq->start) - rreq->len = i_size - rreq->start; -} - -/* * Completion of a request operation. */ static void cifs_rreq_done(struct netfs_io_request *rreq) @@ -302,12 +291,6 @@ static void cifs_rreq_done(struct netfs_io_request *rreq) inode_set_atime_to_ts(inode, inode_get_mtime(inode)); } -static void cifs_post_modify(struct inode *inode) -{ - /* Indication to update ctime and mtime as close is deferred */ - set_bit(CIFS_INO_MODIFIED_ATTR, &CIFS_I(inode)->flags); -} - static void cifs_free_request(struct netfs_io_request *rreq) { struct cifs_io_request *req = container_of(rreq, struct cifs_io_request, rreq); @@ -331,7 +314,20 @@ static void cifs_free_subrequest(struct netfs_io_subrequest *subreq) #endif } - add_credits_and_wake_if(rdata->server, &rdata->credits, 0); + if (rdata->credits.value != 0) { + trace_smb3_rw_credits(rdata->rreq->debug_id, + rdata->subreq.debug_index, + rdata->credits.value, + rdata->server ? rdata->server->credits : 0, + rdata->server ? rdata->server->in_flight : 0, + -rdata->credits.value, + cifs_trace_rw_credits_free_subreq); + if (rdata->server) + add_credits_and_wake_if(rdata->server, &rdata->credits, 0); + else + rdata->credits.value = 0; + } + if (rdata->have_xid) free_xid(rdata->xid); } @@ -342,14 +338,13 @@ const struct netfs_request_ops cifs_req_ops = { .init_request = cifs_init_request, .free_request = cifs_free_request, .free_subrequest = cifs_free_subrequest, - .expand_readahead = cifs_expand_readahead, - .clamp_length = cifs_clamp_length, - .issue_read = cifs_req_issue_read, + .prepare_read = cifs_prepare_read, + .issue_read = cifs_issue_read, .done = cifs_rreq_done, - .post_modify = cifs_post_modify, .begin_writeback = cifs_begin_writeback, .prepare_write = cifs_prepare_write, .issue_write = cifs_issue_write, + .invalidate_cache = cifs_netfs_invalidate_cache, }; /* @@ -1369,7 +1364,7 @@ int cifs_close(struct inode *inode, struct file *file) dclose = kmalloc(sizeof(struct cifs_deferred_close), GFP_KERNEL); if ((cfile->status_file_deleted == false) && (smb2_can_defer_close(inode, dclose))) { - if (test_and_clear_bit(CIFS_INO_MODIFIED_ATTR, &cinode->flags)) { + if (test_and_clear_bit(NETFS_ICTX_MODIFIED_ATTR, &cinode->netfs.flags)) { inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode)); } @@ -1408,7 +1403,7 @@ void cifs_reopen_persistent_handles(struct cifs_tcon *tcon) { struct cifsFileInfo *open_file, *tmp; - struct list_head tmp_list; + LIST_HEAD(tmp_list); if (!tcon->use_persistent || !tcon->need_reopen_files) return; @@ -1416,7 +1411,6 @@ cifs_reopen_persistent_handles(struct cifs_tcon *tcon) tcon->need_reopen_files = false; cifs_dbg(FYI, "Reopen persistent handles\n"); - INIT_LIST_HEAD(&tmp_list); /* list all files open on tree connection, reopen resilient handles */ spin_lock(&tcon->open_file_lock); @@ -2099,9 +2093,7 @@ cifs_unlock_range(struct cifsFileInfo *cfile, struct file_lock *flock, struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry)); struct cifsLockInfo *li, *tmp; __u64 length = cifs_flock_len(flock); - struct list_head tmp_llist; - - INIT_LIST_HEAD(&tmp_llist); + LIST_HEAD(tmp_llist); /* * Accessing maxBuf is racy with cifs_reconnect - need to store value @@ -2401,13 +2393,18 @@ void cifs_write_subrequest_terminated(struct cifs_io_subrequest *wdata, ssize_t bool was_async) { struct netfs_io_request *wreq = wdata->rreq; - loff_t new_server_eof; + struct netfs_inode *ictx = netfs_inode(wreq->inode); + loff_t wrend; if (result > 0) { - new_server_eof = wdata->subreq.start + wdata->subreq.transferred + result; + wrend = wdata->subreq.start + wdata->subreq.transferred + result; - if (new_server_eof > netfs_inode(wreq->inode)->remote_i_size) - netfs_resize_file(netfs_inode(wreq->inode), new_server_eof, true); + if (wrend > ictx->zero_point && + (wdata->rreq->origin == NETFS_UNBUFFERED_WRITE || + wdata->rreq->origin == NETFS_DIO_WRITE)) + ictx->zero_point = wrend; + if (wrend > ictx->remote_i_size) + netfs_resize_file(ictx, wrend, true); } netfs_write_subrequest_terminated(&wdata->subreq, result, was_async); @@ -2751,6 +2748,7 @@ cifs_writev(struct kiocb *iocb, struct iov_iter *from) struct inode *inode = file->f_mapping->host; struct cifsInodeInfo *cinode = CIFS_I(inode); struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server; + struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); ssize_t rc; rc = netfs_start_io_write(inode); @@ -2767,12 +2765,16 @@ cifs_writev(struct kiocb *iocb, struct iov_iter *from) if (rc <= 0) goto out; - if (!cifs_find_lock_conflict(cfile, iocb->ki_pos, iov_iter_count(from), + if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) && + (cifs_find_lock_conflict(cfile, iocb->ki_pos, iov_iter_count(from), server->vals->exclusive_lock_type, 0, - NULL, CIFS_WRITE_OP)) - rc = netfs_buffered_write_iter_locked(iocb, from, NULL); - else + NULL, CIFS_WRITE_OP))) { rc = -EACCES; + goto out; + } + + rc = netfs_buffered_write_iter_locked(iocb, from, NULL); + out: up_read(&cinode->lock_sem); netfs_end_io_write(inode); @@ -2904,9 +2906,7 @@ cifs_strict_readv(struct kiocb *iocb, struct iov_iter *to) if (!CIFS_CACHE_READ(cinode)) return netfs_unbuffered_read_iter(iocb, to); - if (cap_unix(tcon->ses) && - (CIFS_UNIX_FCNTL_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability)) && - ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0)) { + if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0) { if (iocb->ki_flags & IOCB_DIRECT) return netfs_unbuffered_read_iter(iocb, to); return netfs_buffered_read_iter(iocb, to); @@ -2920,6 +2920,7 @@ cifs_strict_readv(struct kiocb *iocb, struct iov_iter *to) rc = netfs_start_io_direct(inode); if (rc < 0) goto out; + rc = -EACCES; down_read(&cinode->lock_sem); if (!cifs_find_lock_conflict( cfile, iocb->ki_pos, iov_iter_count(to), @@ -2932,6 +2933,7 @@ cifs_strict_readv(struct kiocb *iocb, struct iov_iter *to) rc = netfs_start_io_read(inode); if (rc < 0) goto out; + rc = -EACCES; down_read(&cinode->lock_sem); if (!cifs_find_lock_conflict( cfile, iocb->ki_pos, iov_iter_count(to), @@ -3200,8 +3202,6 @@ static int cifs_swap_rw(struct kiocb *iocb, struct iov_iter *iter) { ssize_t ret; - WARN_ON_ONCE(iov_iter_count(iter) != PAGE_SIZE); - if (iov_iter_rw(iter) == READ) ret = netfs_unbuffered_read_iter_locked(iocb, iter); else |