X-Git-Url: http://git.cascardo.info/?a=blobdiff_plain;f=fs%2Fcifs%2Fconnect.c;h=7d2b15c060909b103e96a90a330c6f0ed7ecd2d0;hb=4fcd1813e6404dd4420c7d12fb483f9320f0bf93;hp=6f62ac821a8459228e50d7a4261482dd4b0d4abe;hpb=94eaec458c037a8ec3a7cd39118d0d4378cabf11;p=cascardo%2Flinux.git diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index 6f62ac821a84..7d2b15c06090 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -428,7 +428,9 @@ cifs_echo_request(struct work_struct *work) * server->ops->need_neg() == true. Also, no need to ping if * we got a response recently. */ - if (!server->ops->need_neg || server->ops->need_neg(server) || + + if (server->tcpStatus == CifsNeedReconnect || + server->tcpStatus == CifsExiting || server->tcpStatus == CifsNew || (server->ops->can_echo && !server->ops->can_echo(server)) || time_before(jiffies, server->lstrp + echo_interval - HZ)) goto requeue_echo; @@ -501,99 +503,34 @@ server_unresponsive(struct TCP_Server_Info *server) return false; } -/* - * kvec_array_init - clone a kvec array, and advance into it - * @new: pointer to memory for cloned array - * @iov: pointer to original array - * @nr_segs: number of members in original array - * @bytes: number of bytes to advance into the cloned array - * - * This function will copy the array provided in iov to a section of memory - * and advance the specified number of bytes into the new array. It returns - * the number of segments in the new array. "new" must be at least as big as - * the original iov array. - */ -static unsigned int -kvec_array_init(struct kvec *new, struct kvec *iov, unsigned int nr_segs, - size_t bytes) -{ - size_t base = 0; - - while (bytes || !iov->iov_len) { - int copy = min(bytes, iov->iov_len); - - bytes -= copy; - base += copy; - if (iov->iov_len == base) { - iov++; - nr_segs--; - base = 0; - } - } - memcpy(new, iov, sizeof(*iov) * nr_segs); - new->iov_base += base; - new->iov_len -= base; - return nr_segs; -} - -static struct kvec * -get_server_iovec(struct TCP_Server_Info *server, unsigned int nr_segs) -{ - struct kvec *new_iov; - - if (server->iov && nr_segs <= server->nr_iov) - return server->iov; - - /* not big enough -- allocate a new one and release the old */ - new_iov = kmalloc(sizeof(*new_iov) * nr_segs, GFP_NOFS); - if (new_iov) { - kfree(server->iov); - server->iov = new_iov; - server->nr_iov = nr_segs; - } - return new_iov; -} - -int -cifs_readv_from_socket(struct TCP_Server_Info *server, struct kvec *iov_orig, - unsigned int nr_segs, unsigned int to_read) +static int +cifs_readv_from_socket(struct TCP_Server_Info *server, struct msghdr *smb_msg) { int length = 0; int total_read; - unsigned int segs; - struct msghdr smb_msg; - struct kvec *iov; - - iov = get_server_iovec(server, nr_segs); - if (!iov) - return -ENOMEM; - smb_msg.msg_control = NULL; - smb_msg.msg_controllen = 0; + smb_msg->msg_control = NULL; + smb_msg->msg_controllen = 0; - for (total_read = 0; to_read; total_read += length, to_read -= length) { + for (total_read = 0; msg_data_left(smb_msg); total_read += length) { try_to_freeze(); - if (server_unresponsive(server)) { - total_read = -ECONNABORTED; - break; - } + if (server_unresponsive(server)) + return -ECONNABORTED; - segs = kvec_array_init(iov, iov_orig, nr_segs, total_read); + length = sock_recvmsg(server->ssocket, smb_msg, 0); - length = kernel_recvmsg(server->ssocket, &smb_msg, - iov, segs, to_read, 0); + if (server->tcpStatus == CifsExiting) + return -ESHUTDOWN; - if (server->tcpStatus == CifsExiting) { - total_read = -ESHUTDOWN; - break; - } else if (server->tcpStatus == CifsNeedReconnect) { + if (server->tcpStatus == CifsNeedReconnect) { cifs_reconnect(server); - total_read = -ECONNABORTED; - break; - } else if (length == -ERESTARTSYS || - length == -EAGAIN || - length == -EINTR) { + return -ECONNABORTED; + } + + if (length == -ERESTARTSYS || + length == -EAGAIN || + length == -EINTR) { /* * Minimum sleep to prevent looping, allowing socket * to clear and app threads to set tcpStatus @@ -602,12 +539,12 @@ cifs_readv_from_socket(struct TCP_Server_Info *server, struct kvec *iov_orig, usleep_range(1000, 2000); length = 0; continue; - } else if (length <= 0) { - cifs_dbg(FYI, "Received no data or error: expecting %d\n" - "got %d", to_read, length); + } + + if (length <= 0) { + cifs_dbg(FYI, "Received no data or error: %d\n", length); cifs_reconnect(server); - total_read = -ECONNABORTED; - break; + return -ECONNABORTED; } } return total_read; @@ -617,12 +554,21 @@ int cifs_read_from_socket(struct TCP_Server_Info *server, char *buf, unsigned int to_read) { - struct kvec iov; + struct msghdr smb_msg; + struct kvec iov = {.iov_base = buf, .iov_len = to_read}; + iov_iter_kvec(&smb_msg.msg_iter, READ | ITER_KVEC, &iov, 1, to_read); - iov.iov_base = buf; - iov.iov_len = to_read; + return cifs_readv_from_socket(server, &smb_msg); +} - return cifs_readv_from_socket(server, &iov, 1, to_read); +int +cifs_read_page_from_socket(struct TCP_Server_Info *server, struct page *page, + unsigned int to_read) +{ + struct msghdr smb_msg; + struct bio_vec bv = {.bv_page = page, .bv_len = to_read}; + iov_iter_bvec(&smb_msg.msg_iter, READ | ITER_BVEC, &bv, 1, to_read); + return cifs_readv_from_socket(server, &smb_msg); } static bool @@ -783,7 +729,6 @@ static void clean_demultiplex_info(struct TCP_Server_Info *server) } kfree(server->hostname); - kfree(server->iov); kfree(server); length = atomic_dec_return(&tcpSesAllocCount); @@ -1196,8 +1141,12 @@ cifs_parse_devname(const char *devname, struct smb_vol *vol) convert_delimiter(vol->UNC, '\\'); - /* If pos is NULL, or is a bogus trailing delimiter then no prepath */ - if (!*pos++ || !*pos) + /* skip any delimiter */ + if (*pos == '/' || *pos == '\\') + pos++; + + /* If pos is NULL then no prepath */ + if (!*pos) return 0; vol->prepath = kstrdup(pos, GFP_KERNEL); @@ -2918,7 +2867,7 @@ static inline void cifs_reclassify_socket4(struct socket *sock) { struct sock *sk = sock->sk; - BUG_ON(sock_owned_by_user(sk)); + BUG_ON(!sock_allow_reclassification(sk)); sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS", &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]); } @@ -2927,7 +2876,7 @@ static inline void cifs_reclassify_socket6(struct socket *sock) { struct sock *sk = sock->sk; - BUG_ON(sock_owned_by_user(sk)); + BUG_ON(!sock_allow_reclassification(sk)); sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS", &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]); }