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Date: Wed, 05 Sep 2012 13:55:53 +0900 (JST)
From: Masatake YAMATO <yamato@...hat.com>
To: sfr@...b.auug.org.au
Cc: davem@...emloft.net, netdev@...r.kernel.org,
linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
viro@...iv.linux.org.uk
Subject: Re: linux-next: manual merge of the net-next tree with the vfs tree
Hi,
How can I see source files applied your patch?
(I'm very new to kernel development.)
You patch looks like a patch for another patch.
Masatake YAMATO
> Hi all,
>
> Today's linux-next merge of the net-next tree got a conflict in
> net/socket.c between commits f8a78429cc70 ("take descriptor handling from
> sock_alloc_file() to callers") and 32b529f92ea7 ("unexport sock_map_fd(),
> switch to sock_alloc_file()") from the vfs tree and commit 600e177920df
> ("net: Providing protocol type via system.sockprotoname xattr
> of /proc/PID/fd entries") from the net-next tree.
>
> I fixed it up (see below) and can carry the fix as necessary. I also had
> to add this merge fix patch:
>
> From: Stephen Rothwell <sfr@...b.auug.org.au>
> Date: Wed, 5 Sep 2012 11:52:06 +1000
> Subject: [PATCH] net: cope with sock_alloc_file() API change
>
> Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
> ---
> include/linux/net.h | 3 ++-
> net/9p/trans_fd.c | 2 +-
> net/sctp/socket.c | 2 +-
> 3 files changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/include/linux/net.h b/include/linux/net.h
> index c8a9708..a3831f3 100644
> --- a/include/linux/net.h
> +++ b/include/linux/net.h
> @@ -247,7 +247,8 @@ extern int sock_sendmsg(struct socket *sock, struct msghdr *msg,
> size_t len);
> extern int sock_recvmsg(struct socket *sock, struct msghdr *msg,
> size_t size, int flags);
> -extern struct file *sock_alloc_file(struct socket *sock, int flags);
> +extern struct file *sock_alloc_file(struct socket *sock, int flags,
> + const char *dname);
> extern struct socket *sockfd_lookup(int fd, int *err);
> extern struct socket *sock_from_file(struct file *file, int *err);
> #define sockfd_put(sock) fput(sock->file)
> diff --git a/net/9p/trans_fd.c b/net/9p/trans_fd.c
> index 8c4e0b5..1c8b557 100644
> --- a/net/9p/trans_fd.c
> +++ b/net/9p/trans_fd.c
> @@ -801,7 +801,7 @@ static int p9_socket_open(struct p9_client *client, struct socket *csocket)
> return -ENOMEM;
>
> csocket->sk->sk_allocation = GFP_NOIO;
> - file = sock_alloc_file(csocket, 0);
> + file = sock_alloc_file(csocket, 0, NULL);
> if (IS_ERR(file)) {
> pr_err("%s (%d): failed to map fd\n",
> __func__, task_pid_nr(current));
> diff --git a/net/sctp/socket.c b/net/sctp/socket.c
> index 5ba739e..59d16ea 100644
> --- a/net/sctp/socket.c
> +++ b/net/sctp/socket.c
> @@ -4313,7 +4313,7 @@ static int sctp_getsockopt_peeloff(struct sock *sk, int len, char __user *optval
> goto out;
> }
>
> - newfile = sock_alloc_file(newsock, 0);
> + newfile = sock_alloc_file(newsock, 0, NULL);
> if (unlikely(IS_ERR(newfile))) {
> put_unused_fd(retval);
> sock_release(newsock);
> --
> 1.7.10.280.gaa39
>
> --
> Cheers,
> Stephen Rothwell sfr@...b.auug.org.au
>
> diff --cc net/socket.c
> index 79170dc,977c0f4..0000000
> --- a/net/socket.c
> +++ b/net/socket.c
> @@@ -346,15 -347,30 +347,23 @@@ static struct file_system_type sock_fs_
> * but we take care of internal coherence yet.
> */
>
> - struct file *sock_alloc_file(struct socket *sock, int flags)
> -static int sock_alloc_file(struct socket *sock, struct file **f, int flags,
> - const char *dname)
> ++struct file *sock_alloc_file(struct socket *sock, int flags,
> ++ const char *dname)
> {
> struct qstr name = { .name = "" };
> struct path path;
> struct file *file;
> - int fd;
> -
> - fd = get_unused_fd_flags(flags);
> - if (unlikely(fd < 0))
> - return fd;
>
> + if (dname) {
> + name.name = dname;
> + name.len = strlen(name.name);
> + } else if (sock->sk) {
> + name.name = sock->sk->sk_prot_creator->name;
> + name.len = strlen(name.name);
> + }
> path.dentry = d_alloc_pseudo(sock_mnt->mnt_sb, &name);
> - if (unlikely(!path.dentry)) {
> - put_unused_fd(fd);
> - return -ENOMEM;
> - }
> + if (unlikely(!path.dentry))
> + return ERR_PTR(-ENOMEM);
> path.mnt = mntget(sock_mnt);
>
> d_instantiate(path.dentry, SOCK_INODE(sock));
> @@@ -373,26 -390,22 +382,26 @@@
> file->f_flags = O_RDWR | (flags & O_NONBLOCK);
> file->f_pos = 0;
> file->private_data = sock;
> -
> - *f = file;
> - return fd;
> + return file;
> }
> +EXPORT_SYMBOL(sock_alloc_file);
>
> -int sock_map_fd(struct socket *sock, int flags)
> +static int sock_map_fd(struct socket *sock, int flags)
> {
> struct file *newfile;
> - int fd = sock_alloc_file(sock, &newfile, flags, NULL);
> + int fd = get_unused_fd_flags(flags);
> + if (unlikely(fd < 0))
> + return fd;
>
> - newfile = sock_alloc_file(sock, flags);
> - if (likely(fd >= 0))
> ++ newfile = sock_alloc_file(sock, flags, NULL);
> + if (likely(!IS_ERR(newfile))) {
> fd_install(fd, newfile);
> + return fd;
> + }
>
> - return fd;
> + put_unused_fd(fd);
> + return PTR_ERR(newfile);
> }
> -EXPORT_SYMBOL(sock_map_fd);
>
> struct socket *sock_from_file(struct file *file, int *err)
> {
> @@@ -1395,27 -1471,12 +1467,27 @@@ SYSCALL_DEFINE4(socketpair, int, family
> err = fd1;
> goto out_release_both;
> }
> -
> - fd2 = sock_alloc_file(sock2, &newfile2, flags, NULL);
> + fd2 = get_unused_fd_flags(flags);
> if (unlikely(fd2 < 0)) {
> err = fd2;
> + put_unused_fd(fd1);
> + goto out_release_both;
> + }
> +
> - newfile1 = sock_alloc_file(sock1, flags);
> ++ newfile1 = sock_alloc_file(sock1, flags, NULL);
> + if (unlikely(IS_ERR(newfile1))) {
> + err = PTR_ERR(newfile1);
> + put_unused_fd(fd1);
> + put_unused_fd(fd2);
> + goto out_release_both;
> + }
> +
> - newfile2 = sock_alloc_file(sock2, flags);
> ++ newfile2 = sock_alloc_file(sock2, flags, NULL);
> + if (IS_ERR(newfile2)) {
> + err = PTR_ERR(newfile2);
> fput(newfile1);
> put_unused_fd(fd1);
> + put_unused_fd(fd2);
> sock_release(sock2);
> goto out;
> }
> @@@ -1553,13 -1615,6 +1625,14 @@@ SYSCALL_DEFINE4(accept4, int, fd, struc
> sock_release(newsock);
> goto out_put;
> }
> - newfile = sock_alloc_file(newsock, flags);
> ++ newfile = sock_alloc_file(newsock, flags,
> ++ sock->sk->sk_prot_creator->name);
> + if (unlikely(IS_ERR(newfile))) {
> + err = PTR_ERR(newfile);
> + put_unused_fd(newfd);
> + sock_release(newsock);
> + goto out_put;
> + }
>
> err = security_socket_accept(sock, newsock);
> if (err)
--
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