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-rw-r--r--hw/file-op-9p.h8
-rw-r--r--hw/virtio-9p-local.c87
-rw-r--r--hw/virtio-9p.c264
3 files changed, 357 insertions, 2 deletions
diff --git a/hw/file-op-9p.h b/hw/file-op-9p.h
index 12503c1..5049b2e 100644
--- a/hw/file-op-9p.h
+++ b/hw/file-op-9p.h
@@ -29,11 +29,17 @@ typedef struct FileOperations
{
int (*lstat)(FsContext *, const char *, struct stat *);
ssize_t (*readlink)(FsContext *, const char *, char *, size_t);
+ int (*chmod)(FsContext *, const char *, mode_t);
+ int (*mknod)(FsContext *, const char *, mode_t, dev_t);
+ int (*mksock)(FsContext *, const char *);
+ int (*symlink)(FsContext *, const char *, const char *);
+ int (*link)(FsContext *, const char *, const char *);
int (*setuid)(FsContext *, uid_t);
int (*close)(FsContext *, int);
int (*closedir)(FsContext *, DIR *);
DIR *(*opendir)(FsContext *, const char *);
int (*open)(FsContext *, const char *, int);
+ int (*open2)(FsContext *, const char *, int, mode_t);
void (*rewinddir)(FsContext *, DIR *);
off_t (*telldir)(FsContext *, DIR *);
struct dirent *(*readdir)(FsContext *, DIR *);
@@ -41,6 +47,8 @@ typedef struct FileOperations
ssize_t (*readv)(FsContext *, int, const struct iovec *, int);
ssize_t (*writev)(FsContext *, int, const struct iovec *, int);
off_t (*lseek)(FsContext *, int, off_t, int);
+ int (*mkdir)(FsContext *, const char *, mode_t);
+ int (*fstat)(FsContext *, int, struct stat *);
void *opaque;
} FileOperations;
#endif
diff --git a/hw/virtio-9p-local.c b/hw/virtio-9p-local.c
index 87aeba8..f6781ca 100644
--- a/hw/virtio-9p-local.c
+++ b/hw/virtio-9p-local.c
@@ -12,8 +12,11 @@
*/
#include "virtio.h"
#include "virtio-9p.h"
+#include <arpa/inet.h>
#include <pwd.h>
#include <grp.h>
+#include <sys/socket.h>
+#include <sys/un.h>
static const char *rpath(FsContext *ctx, const char *path)
{
@@ -133,6 +136,82 @@ static ssize_t local_writev(FsContext *ctx, int fd, const struct iovec *iov,
return writev(fd, iov, iovcnt);
}
+static int local_chmod(FsContext *ctx, const char *path, mode_t mode)
+{
+ return chmod(rpath(ctx, path), mode);
+}
+
+static int local_mknod(FsContext *ctx, const char *path, mode_t mode, dev_t dev)
+{
+ return mknod(rpath(ctx, path), mode, dev);
+}
+
+static int local_mksock(FsContext *ctx2, const char *path)
+{
+ struct sockaddr_un addr;
+ int s;
+
+ addr.sun_family = AF_UNIX;
+ snprintf(addr.sun_path, 108, "%s", rpath(ctx2, path));
+
+ s = socket(PF_UNIX, SOCK_STREAM, 0);
+ if (s == -1) {
+ return -1;
+ }
+
+ if (bind(s, (struct sockaddr *)&addr, sizeof(addr))) {
+ close(s);
+ return -1;
+ }
+
+ close(s);
+ return 0;
+}
+
+static int local_mkdir(FsContext *ctx, const char *path, mode_t mode)
+{
+ return mkdir(rpath(ctx, path), mode);
+}
+
+static int local_fstat(FsContext *ctx, int fd, struct stat *stbuf)
+{
+ return fstat(fd, stbuf);
+}
+
+static int local_open2(FsContext *ctx, const char *path, int flags, mode_t mode)
+{
+ return open(rpath(ctx, path), flags, mode);
+}
+
+static int local_symlink(FsContext *ctx, const char *oldpath,
+ const char *newpath)
+{
+ return symlink(oldpath, rpath(ctx, newpath));
+}
+
+static int local_link(FsContext *ctx, const char *oldpath, const char *newpath)
+{
+ char *tmp = qemu_strdup(rpath(ctx, oldpath));
+ int err, serrno = 0;
+
+ if (tmp == NULL) {
+ return -ENOMEM;
+ }
+
+ err = link(tmp, rpath(ctx, newpath));
+ if (err == -1) {
+ serrno = errno;
+ }
+
+ qemu_free(tmp);
+
+ if (err == -1) {
+ errno = serrno;
+ }
+
+ return err;
+}
+
FileOperations local_ops = {
.lstat = local_lstat,
.setuid = local_setuid,
@@ -148,4 +227,12 @@ FileOperations local_ops = {
.readv = local_readv,
.lseek = local_lseek,
.writev = local_writev,
+ .chmod = local_chmod,
+ .mknod = local_mknod,
+ .mksock = local_mksock,
+ .mkdir = local_mkdir,
+ .fstat = local_fstat,
+ .open2 = local_open2,
+ .symlink = local_symlink,
+ .link = local_link,
};
diff --git a/hw/virtio-9p.c b/hw/virtio-9p.c
index 252eaa9..bb2a4ba 100644
--- a/hw/virtio-9p.c
+++ b/hw/virtio-9p.c
@@ -103,6 +103,47 @@ static int v9fs_do_writev(V9fsState *s, int fd, const struct iovec *iov,
return s->ops->writev(&s->ctx, fd, iov, iovcnt);
}
+static int v9fs_do_chmod(V9fsState *s, V9fsString *path, mode_t mode)
+{
+ return s->ops->chmod(&s->ctx, path->data, mode);
+}
+
+static int v9fs_do_mknod(V9fsState *s, V9fsString *path, mode_t mode, dev_t dev)
+{
+ return s->ops->mknod(&s->ctx, path->data, mode, dev);
+}
+
+static int v9fs_do_mksock(V9fsState *s, V9fsString *path)
+{
+ return s->ops->mksock(&s->ctx, path->data);
+}
+
+static int v9fs_do_mkdir(V9fsState *s, V9fsString *path, mode_t mode)
+{
+ return s->ops->mkdir(&s->ctx, path->data, mode);
+}
+
+static int v9fs_do_fstat(V9fsState *s, int fd, struct stat *stbuf)
+{
+ return s->ops->fstat(&s->ctx, fd, stbuf);
+}
+
+static int v9fs_do_open2(V9fsState *s, V9fsString *path, int flags, mode_t mode)
+{
+ return s->ops->open2(&s->ctx, path->data, flags, mode);
+}
+
+static int v9fs_do_symlink(V9fsState *s, V9fsString *oldpath,
+ V9fsString *newpath)
+{
+ return s->ops->symlink(&s->ctx, oldpath->data, newpath->data);
+}
+
+static int v9fs_do_link(V9fsState *s, V9fsString *oldpath, V9fsString *newpath)
+{
+ return s->ops->link(&s->ctx, oldpath->data, newpath->data);
+}
+
static void v9fs_string_init(V9fsString *str)
{
str->data = NULL;
@@ -1649,11 +1690,230 @@ out:
qemu_free(vs);
}
+typedef struct V9fsCreateState {
+ V9fsPDU *pdu;
+ size_t offset;
+ V9fsFidState *fidp;
+ V9fsQID qid;
+ int32_t perm;
+ int8_t mode;
+ struct stat stbuf;
+ V9fsString name;
+ V9fsString extension;
+ V9fsString fullname;
+} V9fsCreateState;
+
+static void v9fs_post_create(V9fsState *s, V9fsCreateState *vs, int err)
+{
+ if (err == 0) {
+ v9fs_string_copy(&vs->fidp->path, &vs->fullname);
+ stat_to_qid(&vs->stbuf, &vs->qid);
+
+ vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0);
+
+ err = vs->offset;
+ }
+
+ complete_pdu(s, vs->pdu, err);
+ v9fs_string_free(&vs->name);
+ v9fs_string_free(&vs->extension);
+ v9fs_string_free(&vs->fullname);
+ qemu_free(vs);
+}
+
+static void v9fs_create_post_perms(V9fsState *s, V9fsCreateState *vs, int err)
+{
+ if (err) {
+ err = -errno;
+ }
+ v9fs_post_create(s, vs, err);
+}
+
+static void v9fs_create_post_opendir(V9fsState *s, V9fsCreateState *vs,
+ int err)
+{
+ if (!vs->fidp->dir) {
+ err = -errno;
+ }
+ v9fs_post_create(s, vs, err);
+}
+
+static void v9fs_create_post_dir_lstat(V9fsState *s, V9fsCreateState *vs,
+ int err)
+{
+ if (err) {
+ err = -errno;
+ goto out;
+ }
+
+ vs->fidp->dir = v9fs_do_opendir(s, &vs->fullname);
+ v9fs_create_post_opendir(s, vs, err);
+ return;
+
+out:
+ v9fs_post_create(s, vs, err);
+}
+
+static void v9fs_create_post_mkdir(V9fsState *s, V9fsCreateState *vs, int err)
+{
+ if (err) {
+ err = -errno;
+ goto out;
+ }
+
+ err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf);
+ v9fs_create_post_dir_lstat(s, vs, err);
+ return;
+
+out:
+ v9fs_post_create(s, vs, err);
+}
+
+static void v9fs_create_post_mksock(V9fsState *s, V9fsCreateState *vs,
+ int err)
+{
+ if (err) {
+ err = -errno;
+ goto out;
+ }
+
+ err = v9fs_do_chmod(s, &vs->fullname, vs->perm & 0777);
+ v9fs_create_post_perms(s, vs, err);
+ return;
+
+out:
+ v9fs_post_create(s, vs, err);
+}
+
+static void v9fs_create_post_fstat(V9fsState *s, V9fsCreateState *vs, int err)
+{
+ if (err) {
+ vs->fidp->fd = -1;
+ err = -errno;
+ }
+
+ v9fs_post_create(s, vs, err);
+ return;
+}
+
+static void v9fs_create_post_open2(V9fsState *s, V9fsCreateState *vs, int err)
+{
+ if (vs->fidp->fd == -1) {
+ err = -errno;
+ goto out;
+ }
+
+ err = v9fs_do_fstat(s, vs->fidp->fd, &vs->stbuf);
+ v9fs_create_post_fstat(s, vs, err);
+
+ return;
+
+out:
+ v9fs_post_create(s, vs, err);
+
+}
+
+static void v9fs_create_post_lstat(V9fsState *s, V9fsCreateState *vs, int err)
+{
+
+ if (err == 0 || errno != ENOENT) {
+ err = -errno;
+ goto out;
+ }
+
+ if (vs->perm & P9_STAT_MODE_DIR) {
+ err = v9fs_do_mkdir(s, &vs->fullname, vs->perm & 0777);
+ v9fs_create_post_mkdir(s, vs, err);
+ } else if (vs->perm & P9_STAT_MODE_SYMLINK) {
+ err = v9fs_do_symlink(s, &vs->extension, &vs->fullname);
+ v9fs_create_post_perms(s, vs, err);
+ } else if (vs->perm & P9_STAT_MODE_LINK) {
+ int32_t nfid = atoi(vs->extension.data);
+ V9fsFidState *nfidp = lookup_fid(s, nfid);
+ if (nfidp == NULL) {
+ err = -errno;
+ v9fs_post_create(s, vs, err);
+ }
+ err = v9fs_do_link(s, &nfidp->path, &vs->fullname);
+ v9fs_create_post_perms(s, vs, err);
+ } else if (vs->perm & P9_STAT_MODE_DEVICE) {
+ char ctype;
+ uint32_t major, minor;
+ mode_t nmode = 0;
+
+ if (sscanf(vs->extension.data, "%c %u %u", &ctype, &major,
+ &minor) != 3) {
+ err = -errno;
+ v9fs_post_create(s, vs, err);
+ }
+
+ switch (ctype) {
+ case 'c':
+ nmode = S_IFCHR;
+ break;
+ case 'b':
+ nmode = S_IFBLK;
+ break;
+ default:
+ err = -EIO;
+ v9fs_post_create(s, vs, err);
+ }
+
+ nmode |= vs->perm & 0777;
+ err = v9fs_do_mknod(s, &vs->fullname, nmode, makedev(major, minor));
+ v9fs_create_post_perms(s, vs, err);
+ } else if (vs->perm & P9_STAT_MODE_NAMED_PIPE) {
+ err = v9fs_do_mknod(s, &vs->fullname, S_IFIFO | (vs->mode & 0777), 0);
+ v9fs_post_create(s, vs, err);
+ } else if (vs->perm & P9_STAT_MODE_SOCKET) {
+ err = v9fs_do_mksock(s, &vs->fullname);
+ v9fs_create_post_mksock(s, vs, err);
+ } else {
+ vs->fidp->fd = v9fs_do_open2(s, &vs->fullname,
+ omode_to_uflags(vs->mode) | O_CREAT,
+ vs->perm & 0777);
+ v9fs_create_post_open2(s, vs, err);
+ }
+
+ return;
+
+out:
+ v9fs_post_create(s, vs, err);
+}
+
static void v9fs_create(V9fsState *s, V9fsPDU *pdu)
{
- if (debug_9p_pdu) {
- pprint_pdu(pdu);
+ int32_t fid;
+ V9fsCreateState *vs;
+ int err = 0;
+
+ vs = qemu_malloc(sizeof(*vs));
+ vs->pdu = pdu;
+ vs->offset = 7;
+
+ v9fs_string_init(&vs->fullname);
+
+ pdu_unmarshal(vs->pdu, vs->offset, "dsdbs", &fid, &vs->name,
+ &vs->perm, &vs->mode, &vs->extension);
+
+ vs->fidp = lookup_fid(s, fid);
+ if (vs->fidp == NULL) {
+ err = -EINVAL;
+ goto out;
}
+
+ v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data,
+ vs->name.data);
+
+ err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf);
+ v9fs_create_post_lstat(s, vs, err);
+ return;
+
+out:
+ complete_pdu(s, vs->pdu, err);
+ v9fs_string_free(&vs->name);
+ v9fs_string_free(&vs->extension);
+ qemu_free(vs);
}
static void v9fs_flush(V9fsState *s, V9fsPDU *pdu)
generated by cgit v1.1 at 2024-11-02 18:48:13 +0000