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Diffstat (limited to 'net')
-rw-r--r--net/9p/trans_fd.c112
-rw-r--r--net/socket.c108
2 files changed, 82 insertions, 138 deletions
diff --git a/net/9p/trans_fd.c b/net/9p/trans_fd.c
index 4dd873e3a1b..be1cb909d8c 100644
--- a/net/9p/trans_fd.c
+++ b/net/9p/trans_fd.c
@@ -42,6 +42,8 @@
#include <net/9p/client.h>
#include <net/9p/transport.h>
+#include <linux/syscalls.h> /* killme */
+
#define P9_PORT 564
#define MAX_SOCK_BUF (64*1024)
#define MAXPOLLWADDR 2
@@ -788,24 +790,41 @@ static int p9_fd_open(struct p9_client *client, int rfd, int wfd)
static int p9_socket_open(struct p9_client *client, struct socket *csocket)
{
- int fd, ret;
+ struct p9_trans_fd *p;
+ int ret, fd;
+
+ p = kmalloc(sizeof(struct p9_trans_fd), GFP_KERNEL);
+ if (!p)
+ return -ENOMEM;
csocket->sk->sk_allocation = GFP_NOIO;
fd = sock_map_fd(csocket, 0);
if (fd < 0) {
P9_EPRINTK(KERN_ERR, "p9_socket_open: failed to map fd\n");
+ sock_release(csocket);
+ kfree(p);
return fd;
}
- ret = p9_fd_open(client, fd, fd);
- if (ret < 0) {
- P9_EPRINTK(KERN_ERR, "p9_socket_open: failed to open fd\n");
+ get_file(csocket->file);
+ get_file(csocket->file);
+ p->wr = p->rd = csocket->file;
+ client->trans = p;
+ client->status = Connected;
+
+ sys_close(fd); /* still racy */
+
+ p->rd->f_flags |= O_NONBLOCK;
+
+ p->conn = p9_conn_create(client);
+ if (IS_ERR(p->conn)) {
+ ret = PTR_ERR(p->conn);
+ p->conn = NULL;
+ kfree(p);
+ sockfd_put(csocket);
sockfd_put(csocket);
return ret;
}
-
- ((struct p9_trans_fd *)client->trans)->rd->f_flags |= O_NONBLOCK;
-
return 0;
}
@@ -883,7 +902,6 @@ p9_fd_create_tcp(struct p9_client *client, const char *addr, char *args)
struct socket *csocket;
struct sockaddr_in sin_server;
struct p9_fd_opts opts;
- struct p9_trans_fd *p = NULL; /* this gets allocated in p9_fd_open */
err = parse_opts(args, &opts);
if (err < 0)
@@ -897,12 +915,11 @@ p9_fd_create_tcp(struct p9_client *client, const char *addr, char *args)
sin_server.sin_family = AF_INET;
sin_server.sin_addr.s_addr = in_aton(addr);
sin_server.sin_port = htons(opts.port);
- sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, &csocket);
+ err = sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, &csocket);
- if (!csocket) {
+ if (err) {
P9_EPRINTK(KERN_ERR, "p9_trans_tcp: problem creating socket\n");
- err = -EIO;
- goto error;
+ return err;
}
err = csocket->ops->connect(csocket,
@@ -912,30 +929,11 @@ p9_fd_create_tcp(struct p9_client *client, const char *addr, char *args)
P9_EPRINTK(KERN_ERR,
"p9_trans_tcp: problem connecting socket to %s\n",
addr);
- goto error;
- }
-
- err = p9_socket_open(client, csocket);
- if (err < 0)
- goto error;
-
- p = (struct p9_trans_fd *) client->trans;
- p->conn = p9_conn_create(client);
- if (IS_ERR(p->conn)) {
- err = PTR_ERR(p->conn);
- p->conn = NULL;
- goto error;
- }
-
- return 0;
-
-error:
- if (csocket)
sock_release(csocket);
+ return err;
+ }
- kfree(p);
-
- return err;
+ return p9_socket_open(client, csocket);
}
static int
@@ -944,49 +942,33 @@ p9_fd_create_unix(struct p9_client *client, const char *addr, char *args)
int err;
struct socket *csocket;
struct sockaddr_un sun_server;
- struct p9_trans_fd *p = NULL; /* this gets allocated in p9_fd_open */
csocket = NULL;
if (strlen(addr) > UNIX_PATH_MAX) {
P9_EPRINTK(KERN_ERR, "p9_trans_unix: address too long: %s\n",
addr);
- err = -ENAMETOOLONG;
- goto error;
+ return -ENAMETOOLONG;
}
sun_server.sun_family = PF_UNIX;
strcpy(sun_server.sun_path, addr);
- sock_create_kern(PF_UNIX, SOCK_STREAM, 0, &csocket);
+ err = sock_create_kern(PF_UNIX, SOCK_STREAM, 0, &csocket);
+ if (err < 0) {
+ P9_EPRINTK(KERN_ERR, "p9_trans_unix: problem creating socket\n");
+ return err;
+ }
err = csocket->ops->connect(csocket, (struct sockaddr *)&sun_server,
sizeof(struct sockaddr_un) - 1, 0);
if (err < 0) {
P9_EPRINTK(KERN_ERR,
"p9_trans_unix: problem connecting socket: %s: %d\n",
addr, err);
- goto error;
- }
-
- err = p9_socket_open(client, csocket);
- if (err < 0)
- goto error;
-
- p = (struct p9_trans_fd *) client->trans;
- p->conn = p9_conn_create(client);
- if (IS_ERR(p->conn)) {
- err = PTR_ERR(p->conn);
- p->conn = NULL;
- goto error;
- }
-
- return 0;
-
-error:
- if (csocket)
sock_release(csocket);
+ return err;
+ }
- kfree(p);
- return err;
+ return p9_socket_open(client, csocket);
}
static int
@@ -994,7 +976,7 @@ p9_fd_create(struct p9_client *client, const char *addr, char *args)
{
int err;
struct p9_fd_opts opts;
- struct p9_trans_fd *p = NULL; /* this get allocated in p9_fd_open */
+ struct p9_trans_fd *p;
parse_opts(args, &opts);
@@ -1005,21 +987,19 @@ p9_fd_create(struct p9_client *client, const char *addr, char *args)
err = p9_fd_open(client, opts.rfd, opts.wfd);
if (err < 0)
- goto error;
+ return err;
p = (struct p9_trans_fd *) client->trans;
p->conn = p9_conn_create(client);
if (IS_ERR(p->conn)) {
err = PTR_ERR(p->conn);
p->conn = NULL;
- goto error;
+ fput(p->rd);
+ fput(p->wr);
+ return err;
}
return 0;
-
-error:
- kfree(p);
- return err;
}
static struct p9_trans_module p9_tcp_trans = {
diff --git a/net/socket.c b/net/socket.c
index b94c3dd7101..dbfdfa96d29 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -355,68 +355,61 @@ static const struct dentry_operations sockfs_dentry_operations = {
* but we take care of internal coherence yet.
*/
-static int sock_alloc_fd(struct file **filep, int flags)
+static int sock_alloc_file(struct socket *sock, struct file **f, int flags)
{
+ struct qstr name = { .name = "" };
+ struct path path;
+ struct file *file;
int fd;
fd = get_unused_fd_flags(flags);
- if (likely(fd >= 0)) {
- struct file *file = get_empty_filp();
-
- *filep = file;
- if (unlikely(!file)) {
- put_unused_fd(fd);
- return -ENFILE;
- }
- } else
- *filep = NULL;
- return fd;
-}
-
-static int sock_attach_fd(struct socket *sock, struct file *file, int flags)
-{
- struct dentry *dentry;
- struct qstr name = { .name = "" };
+ if (unlikely(fd < 0))
+ return fd;
- dentry = d_alloc(sock_mnt->mnt_sb->s_root, &name);
- if (unlikely(!dentry))
+ path.dentry = d_alloc(sock_mnt->mnt_sb->s_root, &name);
+ if (unlikely(!path.dentry)) {
+ put_unused_fd(fd);
return -ENOMEM;
+ }
+ path.mnt = mntget(sock_mnt);
- dentry->d_op = &sockfs_dentry_operations;
+ path.dentry->d_op = &sockfs_dentry_operations;
/*
* We dont want to push this dentry into global dentry hash table.
* We pretend dentry is already hashed, by unsetting DCACHE_UNHASHED
* This permits a working /proc/$pid/fd/XXX on sockets
*/
- dentry->d_flags &= ~DCACHE_UNHASHED;
- d_instantiate(dentry, SOCK_INODE(sock));
+ path.dentry->d_flags &= ~DCACHE_UNHASHED;
+ d_instantiate(path.dentry, SOCK_INODE(sock));
+ SOCK_INODE(sock)->i_fop = &socket_file_ops;
- sock->file = file;
- init_file(file, sock_mnt, dentry, FMODE_READ | FMODE_WRITE,
+ file = alloc_file(&path, FMODE_READ | FMODE_WRITE,
&socket_file_ops);
- SOCK_INODE(sock)->i_fop = &socket_file_ops;
+ if (unlikely(!file)) {
+ /* drop dentry, keep inode */
+ atomic_inc(&path.dentry->d_inode->i_count);
+ path_put(&path);
+ put_unused_fd(fd);
+ return -ENFILE;
+ }
+
+ sock->file = file;
file->f_flags = O_RDWR | (flags & O_NONBLOCK);
file->f_pos = 0;
file->private_data = sock;
- return 0;
+ *f = file;
+ return fd;
}
int sock_map_fd(struct socket *sock, int flags)
{
struct file *newfile;
- int fd = sock_alloc_fd(&newfile, flags);
-
- if (likely(fd >= 0)) {
- int err = sock_attach_fd(sock, newfile, flags);
+ int fd = sock_alloc_file(sock, &newfile, flags);
- if (unlikely(err < 0)) {
- put_filp(newfile);
- put_unused_fd(fd);
- return err;
- }
+ if (likely(fd >= 0))
fd_install(fd, newfile);
- }
+
return fd;
}
@@ -1390,29 +1383,19 @@ SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol,
if (err < 0)
goto out_release_both;
- fd1 = sock_alloc_fd(&newfile1, flags & O_CLOEXEC);
+ fd1 = sock_alloc_file(sock1, &newfile1, flags);
if (unlikely(fd1 < 0)) {
err = fd1;
goto out_release_both;
}
- fd2 = sock_alloc_fd(&newfile2, flags & O_CLOEXEC);
+ fd2 = sock_alloc_file(sock2, &newfile2, flags);
if (unlikely(fd2 < 0)) {
err = fd2;
- put_filp(newfile1);
- put_unused_fd(fd1);
- goto out_release_both;
- }
-
- err = sock_attach_fd(sock1, newfile1, flags & O_NONBLOCK);
- if (unlikely(err < 0)) {
- goto out_fd2;
- }
-
- err = sock_attach_fd(sock2, newfile2, flags & O_NONBLOCK);
- if (unlikely(err < 0)) {
fput(newfile1);
- goto out_fd1;
+ put_unused_fd(fd1);
+ sock_release(sock2);
+ goto out;
}
audit_fd_pair(fd1, fd2);
@@ -1438,16 +1421,6 @@ out_release_1:
sock_release(sock1);
out:
return err;
-
-out_fd2:
- put_filp(newfile1);
- sock_release(sock1);
-out_fd1:
- put_filp(newfile2);
- sock_release(sock2);
- put_unused_fd(fd1);
- put_unused_fd(fd2);
- goto out;
}
/*
@@ -1551,17 +1524,13 @@ SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr,
*/
__module_get(newsock->ops->owner);
- newfd = sock_alloc_fd(&newfile, flags & O_CLOEXEC);
+ newfd = sock_alloc_file(newsock, &newfile, flags);
if (unlikely(newfd < 0)) {
err = newfd;
sock_release(newsock);
goto out_put;
}
- err = sock_attach_fd(newsock, newfile, flags & O_NONBLOCK);
- if (err < 0)
- goto out_fd_simple;
-
err = security_socket_accept(sock, newsock);
if (err)
goto out_fd;
@@ -1591,11 +1560,6 @@ out_put:
fput_light(sock->file, fput_needed);
out:
return err;
-out_fd_simple:
- sock_release(newsock);
- put_filp(newfile);
- put_unused_fd(newfd);
- goto out_put;
out_fd:
fput(newfile);
put_unused_fd(newfd);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-12 04:10:10 +0000