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Registered in England and Wales under Company Registration No. 3798903 Subject: [PATCH 02/14] cifs: Add a function to read into an iter from a socket From: David Howells To: linux-cachefs@redhat.com Cc: Steve French , Shyam Prasad N , Rohith Surabattula , linux-cifs@vger.kernel.org, dhowells@redhat.com, Steve French , Shyam Prasad N , Rohith Surabattula , Jeff Layton , linux-cifs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Date: Thu, 07 Apr 2022 00:02:58 +0100 Message-ID: <164928617874.457102.10021662143234315566.stgit@warthog.procyon.org.uk> In-Reply-To: <164928615045.457102.10607899252434268982.stgit@warthog.procyon.org.uk> References: <164928615045.457102.10607899252434268982.stgit@warthog.procyon.org.uk> User-Agent: StGit/1.4 MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.11.54.5 Precedence: bulk List-ID: X-Mailing-List: linux-cifs@vger.kernel.org Signed-off-by: David Howells cc: Steve French cc: Shyam Prasad N cc: Rohith Surabattula cc: linux-cifs@vger.kernel.org --- fs/cifs/cifsproto.h | 3 +++ fs/cifs/connect.c | 16 ++++++++++++++++ 2 files changed, 19 insertions(+) diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h index 0df3b24a0bf4..dd4931308ea6 100644 --- a/fs/cifs/cifsproto.h +++ b/fs/cifs/cifsproto.h @@ -245,6 +245,9 @@ extern int cifs_read_page_from_socket(struct TCP_Server_Info *server, unsigned int page_offset, unsigned int to_read); extern int cifs_setup_cifs_sb(struct cifs_sb_info *cifs_sb); +extern int cifs_read_iter_from_socket(struct TCP_Server_Info *server, + struct iov_iter *iter, + unsigned int to_read); extern int cifs_match_super(struct super_block *, void *); extern int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb3_fs_context *ctx); extern void cifs_umount(struct cifs_sb_info *); diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index ee3b7c15e884..080e19e9ee47 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -754,6 +754,22 @@ cifs_read_page_from_socket(struct TCP_Server_Info *server, struct page *page, return cifs_readv_from_socket(server, &smb_msg); } +int +cifs_read_iter_from_socket(struct TCP_Server_Info *server, struct iov_iter *iter, + unsigned int to_read) +{ + struct msghdr smb_msg; + int ret; + + smb_msg.msg_iter = *iter; + if (smb_msg.msg_iter.count > to_read) + smb_msg.msg_iter.count = to_read; + ret = cifs_readv_from_socket(server, &smb_msg); + if (ret > 0) + iov_iter_advance(iter, ret); + return ret; +} + static bool is_smb_response(struct TCP_Server_Info *server, unsigned char type) {