*
*/
-#include "hw/virtio.h"
+#include "hw/virtio/virtio.h"
#include "virtio-9p.h"
#include "virtio-9p-xattr.h"
#include <arpa/inet.h>
#include <grp.h>
#include <sys/socket.h>
#include <sys/un.h>
-#include <attr/xattr.h>
+#include "qemu/xattr.h"
+#include <libgen.h>
+#include <linux/fs.h>
+#ifdef CONFIG_LINUX_MAGIC_H
+#include <linux/magic.h>
+#endif
+#include <sys/ioctl.h>
+
+#ifndef XFS_SUPER_MAGIC
+#define XFS_SUPER_MAGIC 0x58465342
+#endif
+#ifndef EXT2_SUPER_MAGIC
+#define EXT2_SUPER_MAGIC 0xEF53
+#endif
+#ifndef REISERFS_SUPER_MAGIC
+#define REISERFS_SUPER_MAGIC 0x52654973
+#endif
+#ifndef BTRFS_SUPER_MAGIC
+#define BTRFS_SUPER_MAGIC 0x9123683E
+#endif
+
+#define VIRTFS_META_DIR ".virtfs_metadata"
+
+static const char *local_mapped_attr_path(FsContext *ctx,
+ const char *path, char *buffer)
+{
+ char *dir_name;
+ char *tmp_path = g_strdup(path);
+ char *base_name = basename(tmp_path);
+
+ /* NULL terminate the directory */
+ dir_name = tmp_path;
+ *(base_name - 1) = '\0';
+ snprintf(buffer, PATH_MAX, "%s/%s/%s/%s",
+ ctx->fs_root, dir_name, VIRTFS_META_DIR, base_name);
+ g_free(tmp_path);
+ return buffer;
+}
-static int local_lstat(FsContext *fs_ctx, const char *path, struct stat *stbuf)
+#define ATTR_MAX 100
+static void local_mapped_file_attr(FsContext *ctx, const char *path,
+ struct stat *stbuf)
+{
+ FILE *fp;
+ char buf[ATTR_MAX];
+ char attr_path[PATH_MAX];
+
+ local_mapped_attr_path(ctx, path, attr_path);
+ fp = fopen(attr_path, "r");
+ if (!fp) {
+ return;
+ }
+ memset(buf, 0, ATTR_MAX);
+ while (fgets(buf, ATTR_MAX, fp)) {
+ if (!strncmp(buf, "virtfs.uid", 10)) {
+ stbuf->st_uid = atoi(buf+11);
+ } else if (!strncmp(buf, "virtfs.gid", 10)) {
+ stbuf->st_gid = atoi(buf+11);
+ } else if (!strncmp(buf, "virtfs.mode", 11)) {
+ stbuf->st_mode = atoi(buf+12);
+ } else if (!strncmp(buf, "virtfs.rdev", 11)) {
+ stbuf->st_rdev = atoi(buf+12);
+ }
+ memset(buf, 0, ATTR_MAX);
+ }
+ fclose(fp);
+}
+
+static int local_lstat(FsContext *fs_ctx, V9fsPath *fs_path, struct stat *stbuf)
{
int err;
- err = lstat(rpath(fs_ctx, path), stbuf);
+ char buffer[PATH_MAX];
+ char *path = fs_path->data;
+
+ err = lstat(rpath(fs_ctx, path, buffer), stbuf);
if (err) {
return err;
}
- if (fs_ctx->fs_sm == SM_MAPPED) {
+ if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
/* Actual credentials are part of extended attrs */
uid_t tmp_uid;
gid_t tmp_gid;
mode_t tmp_mode;
dev_t tmp_dev;
- if (getxattr(rpath(fs_ctx, path), "user.virtfs.uid", &tmp_uid,
+ if (getxattr(rpath(fs_ctx, path, buffer), "user.virtfs.uid", &tmp_uid,
sizeof(uid_t)) > 0) {
stbuf->st_uid = tmp_uid;
}
- if (getxattr(rpath(fs_ctx, path), "user.virtfs.gid", &tmp_gid,
+ if (getxattr(rpath(fs_ctx, path, buffer), "user.virtfs.gid", &tmp_gid,
sizeof(gid_t)) > 0) {
stbuf->st_gid = tmp_gid;
}
- if (getxattr(rpath(fs_ctx, path), "user.virtfs.mode", &tmp_mode,
- sizeof(mode_t)) > 0) {
+ if (getxattr(rpath(fs_ctx, path, buffer), "user.virtfs.mode",
+ &tmp_mode, sizeof(mode_t)) > 0) {
stbuf->st_mode = tmp_mode;
}
- if (getxattr(rpath(fs_ctx, path), "user.virtfs.rdev", &tmp_dev,
+ if (getxattr(rpath(fs_ctx, path, buffer), "user.virtfs.rdev", &tmp_dev,
sizeof(dev_t)) > 0) {
stbuf->st_rdev = tmp_dev;
}
+ } else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) {
+ local_mapped_file_attr(fs_ctx, path, stbuf);
}
return err;
}
+static int local_create_mapped_attr_dir(FsContext *ctx, const char *path)
+{
+ int err;
+ char attr_dir[PATH_MAX];
+ char *tmp_path = g_strdup(path);
+
+ snprintf(attr_dir, PATH_MAX, "%s/%s/%s",
+ ctx->fs_root, dirname(tmp_path), VIRTFS_META_DIR);
+
+ err = mkdir(attr_dir, 0700);
+ if (err < 0 && errno == EEXIST) {
+ err = 0;
+ }
+ g_free(tmp_path);
+ return err;
+}
+
+static int local_set_mapped_file_attr(FsContext *ctx,
+ const char *path, FsCred *credp)
+{
+ FILE *fp;
+ int ret = 0;
+ char buf[ATTR_MAX];
+ char attr_path[PATH_MAX];
+ int uid = -1, gid = -1, mode = -1, rdev = -1;
+
+ fp = fopen(local_mapped_attr_path(ctx, path, attr_path), "r");
+ if (!fp) {
+ goto create_map_file;
+ }
+ memset(buf, 0, ATTR_MAX);
+ while (fgets(buf, ATTR_MAX, fp)) {
+ if (!strncmp(buf, "virtfs.uid", 10)) {
+ uid = atoi(buf+11);
+ } else if (!strncmp(buf, "virtfs.gid", 10)) {
+ gid = atoi(buf+11);
+ } else if (!strncmp(buf, "virtfs.mode", 11)) {
+ mode = atoi(buf+12);
+ } else if (!strncmp(buf, "virtfs.rdev", 11)) {
+ rdev = atoi(buf+12);
+ }
+ memset(buf, 0, ATTR_MAX);
+ }
+ fclose(fp);
+ goto update_map_file;
+
+create_map_file:
+ ret = local_create_mapped_attr_dir(ctx, path);
+ if (ret < 0) {
+ goto err_out;
+ }
+
+update_map_file:
+ fp = fopen(attr_path, "w");
+ if (!fp) {
+ ret = -1;
+ goto err_out;
+ }
+
+ if (credp->fc_uid != -1) {
+ uid = credp->fc_uid;
+ }
+ if (credp->fc_gid != -1) {
+ gid = credp->fc_gid;
+ }
+ if (credp->fc_mode != -1) {
+ mode = credp->fc_mode;
+ }
+ if (credp->fc_rdev != -1) {
+ rdev = credp->fc_rdev;
+ }
+
+
+ if (uid != -1) {
+ fprintf(fp, "virtfs.uid=%d\n", uid);
+ }
+ if (gid != -1) {
+ fprintf(fp, "virtfs.gid=%d\n", gid);
+ }
+ if (mode != -1) {
+ fprintf(fp, "virtfs.mode=%d\n", mode);
+ }
+ if (rdev != -1) {
+ fprintf(fp, "virtfs.rdev=%d\n", rdev);
+ }
+ fclose(fp);
+
+err_out:
+ return ret;
+}
+
static int local_set_xattr(const char *path, FsCred *credp)
{
int err;
+
if (credp->fc_uid != -1) {
err = setxattr(path, "user.virtfs.uid", &credp->fc_uid, sizeof(uid_t),
0);
}
static int local_post_create_passthrough(FsContext *fs_ctx, const char *path,
- FsCred *credp)
+ FsCred *credp)
{
- if (chmod(rpath(fs_ctx, path), credp->fc_mode & 07777) < 0) {
- return -1;
- }
- if (lchown(rpath(fs_ctx, path), credp->fc_uid, credp->fc_gid) < 0) {
+ char buffer[PATH_MAX];
+
+ if (lchown(rpath(fs_ctx, path, buffer), credp->fc_uid,
+ credp->fc_gid) < 0) {
/*
* If we fail to change ownership and if we are
* using security model none. Ignore the error
*/
- if (fs_ctx->fs_sm != SM_NONE) {
+ if ((fs_ctx->export_flags & V9FS_SEC_MASK) != V9FS_SM_NONE) {
return -1;
}
}
+
+ if (chmod(rpath(fs_ctx, path, buffer), credp->fc_mode & 07777) < 0) {
+ return -1;
+ }
return 0;
}
-static ssize_t local_readlink(FsContext *fs_ctx, const char *path,
- char *buf, size_t bufsz)
+static ssize_t local_readlink(FsContext *fs_ctx, V9fsPath *fs_path,
+ char *buf, size_t bufsz)
{
ssize_t tsize = -1;
- if (fs_ctx->fs_sm == SM_MAPPED) {
+ char buffer[PATH_MAX];
+ char *path = fs_path->data;
+
+ if ((fs_ctx->export_flags & V9FS_SM_MAPPED) ||
+ (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE)) {
int fd;
- fd = open(rpath(fs_ctx, path), O_RDONLY);
+ fd = open(rpath(fs_ctx, path, buffer), O_RDONLY | O_NOFOLLOW);
if (fd == -1) {
return -1;
}
} while (tsize == -1 && errno == EINTR);
close(fd);
return tsize;
- } else if ((fs_ctx->fs_sm == SM_PASSTHROUGH) ||
- (fs_ctx->fs_sm == SM_NONE)) {
- tsize = readlink(rpath(fs_ctx, path), buf, bufsz);
+ } else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) ||
+ (fs_ctx->export_flags & V9FS_SM_NONE)) {
+ tsize = readlink(rpath(fs_ctx, path, buffer), buf, bufsz);
}
return tsize;
}
-static int local_close(FsContext *ctx, int fd)
+static int local_close(FsContext *ctx, V9fsFidOpenState *fs)
{
- return close(fd);
+ return close(fs->fd);
}
-static int local_closedir(FsContext *ctx, DIR *dir)
+static int local_closedir(FsContext *ctx, V9fsFidOpenState *fs)
{
- return closedir(dir);
+ return closedir(fs->dir);
}
-static int local_open(FsContext *ctx, const char *path, int flags)
+static int local_open(FsContext *ctx, V9fsPath *fs_path,
+ int flags, V9fsFidOpenState *fs)
{
- return open(rpath(ctx, path), flags);
+ char buffer[PATH_MAX];
+ char *path = fs_path->data;
+
+ fs->fd = open(rpath(ctx, path, buffer), flags);
+ return fs->fd;
}
-static DIR *local_opendir(FsContext *ctx, const char *path)
+static int local_opendir(FsContext *ctx,
+ V9fsPath *fs_path, V9fsFidOpenState *fs)
{
- return opendir(rpath(ctx, path));
+ char buffer[PATH_MAX];
+ char *path = fs_path->data;
+
+ fs->dir = opendir(rpath(ctx, path, buffer));
+ if (!fs->dir) {
+ return -1;
+ }
+ return 0;
}
-static void local_rewinddir(FsContext *ctx, DIR *dir)
+static void local_rewinddir(FsContext *ctx, V9fsFidOpenState *fs)
{
- return rewinddir(dir);
+ return rewinddir(fs->dir);
}
-static off_t local_telldir(FsContext *ctx, DIR *dir)
+static off_t local_telldir(FsContext *ctx, V9fsFidOpenState *fs)
{
- return telldir(dir);
+ return telldir(fs->dir);
}
-static struct dirent *local_readdir(FsContext *ctx, DIR *dir)
+static int local_readdir_r(FsContext *ctx, V9fsFidOpenState *fs,
+ struct dirent *entry,
+ struct dirent **result)
{
- return readdir(dir);
+ int ret;
+
+again:
+ ret = readdir_r(fs->dir, entry, result);
+ if (ctx->export_flags & V9FS_SM_MAPPED_FILE) {
+ if (!ret && *result != NULL &&
+ !strcmp(entry->d_name, VIRTFS_META_DIR)) {
+ /* skp the meta data directory */
+ goto again;
+ }
+ }
+ return ret;
}
-static void local_seekdir(FsContext *ctx, DIR *dir, off_t off)
+static void local_seekdir(FsContext *ctx, V9fsFidOpenState *fs, off_t off)
{
- return seekdir(dir, off);
+ return seekdir(fs->dir, off);
}
-static ssize_t local_preadv(FsContext *ctx, int fd, const struct iovec *iov,
+static ssize_t local_preadv(FsContext *ctx, V9fsFidOpenState *fs,
+ const struct iovec *iov,
int iovcnt, off_t offset)
{
#ifdef CONFIG_PREADV
- return preadv(fd, iov, iovcnt, offset);
+ return preadv(fs->fd, iov, iovcnt, offset);
#else
- int err = lseek(fd, offset, SEEK_SET);
+ int err = lseek(fs->fd, offset, SEEK_SET);
if (err == -1) {
return err;
} else {
- return readv(fd, iov, iovcnt);
+ return readv(fs->fd, iov, iovcnt);
}
#endif
}
-static ssize_t local_pwritev(FsContext *ctx, int fd, const struct iovec *iov,
- int iovcnt, off_t offset)
+static ssize_t local_pwritev(FsContext *ctx, V9fsFidOpenState *fs,
+ const struct iovec *iov,
+ int iovcnt, off_t offset)
{
+ ssize_t ret
+;
#ifdef CONFIG_PREADV
- return pwritev(fd, iov, iovcnt, offset);
+ ret = pwritev(fs->fd, iov, iovcnt, offset);
#else
- int err = lseek(fd, offset, SEEK_SET);
+ int err = lseek(fs->fd, offset, SEEK_SET);
if (err == -1) {
return err;
} else {
- return writev(fd, iov, iovcnt);
+ ret = writev(fs->fd, iov, iovcnt);
+ }
+#endif
+#ifdef CONFIG_SYNC_FILE_RANGE
+ if (ret > 0 && ctx->export_flags & V9FS_IMMEDIATE_WRITEOUT) {
+ /*
+ * Initiate a writeback. This is not a data integrity sync.
+ * We want to ensure that we don't leave dirty pages in the cache
+ * after write when writeout=immediate is sepcified.
+ */
+ sync_file_range(fs->fd, offset, ret,
+ SYNC_FILE_RANGE_WAIT_BEFORE | SYNC_FILE_RANGE_WRITE);
}
#endif
+ return ret;
}
-static int local_chmod(FsContext *fs_ctx, const char *path, FsCred *credp)
+static int local_chmod(FsContext *fs_ctx, V9fsPath *fs_path, FsCred *credp)
{
- if (fs_ctx->fs_sm == SM_MAPPED) {
- return local_set_xattr(rpath(fs_ctx, path), credp);
- } else if ((fs_ctx->fs_sm == SM_PASSTHROUGH) ||
- (fs_ctx->fs_sm == SM_NONE)) {
- return chmod(rpath(fs_ctx, path), credp->fc_mode);
+ char buffer[PATH_MAX];
+ char *path = fs_path->data;
+
+ if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
+ return local_set_xattr(rpath(fs_ctx, path, buffer), credp);
+ } else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) {
+ return local_set_mapped_file_attr(fs_ctx, path, credp);
+ } else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) ||
+ (fs_ctx->export_flags & V9FS_SM_NONE)) {
+ return chmod(rpath(fs_ctx, path, buffer), credp->fc_mode);
}
return -1;
}
-static int local_mknod(FsContext *fs_ctx, const char *path, FsCred *credp)
+static int local_mknod(FsContext *fs_ctx, V9fsPath *dir_path,
+ const char *name, FsCred *credp)
{
+ char *path;
int err = -1;
int serrno = 0;
+ V9fsString fullname;
+ char buffer[PATH_MAX];
+
+ v9fs_string_init(&fullname);
+ v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
+ path = fullname.data;
/* Determine the security model */
- if (fs_ctx->fs_sm == SM_MAPPED) {
- err = mknod(rpath(fs_ctx, path), SM_LOCAL_MODE_BITS|S_IFREG, 0);
+ if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
+ err = mknod(rpath(fs_ctx, path, buffer),
+ SM_LOCAL_MODE_BITS|S_IFREG, 0);
if (err == -1) {
- return err;
+ goto out;
}
- local_set_xattr(rpath(fs_ctx, path), credp);
+ err = local_set_xattr(rpath(fs_ctx, path, buffer), credp);
if (err == -1) {
serrno = errno;
goto err_end;
}
- } else if ((fs_ctx->fs_sm == SM_PASSTHROUGH) ||
- (fs_ctx->fs_sm == SM_NONE)) {
- err = mknod(rpath(fs_ctx, path), credp->fc_mode, credp->fc_rdev);
+ } else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) {
+
+ err = mknod(rpath(fs_ctx, path, buffer),
+ SM_LOCAL_MODE_BITS|S_IFREG, 0);
if (err == -1) {
- return err;
+ goto out;
+ }
+ err = local_set_mapped_file_attr(fs_ctx, path, credp);
+ if (err == -1) {
+ serrno = errno;
+ goto err_end;
+ }
+ } else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) ||
+ (fs_ctx->export_flags & V9FS_SM_NONE)) {
+ err = mknod(rpath(fs_ctx, path, buffer), credp->fc_mode,
+ credp->fc_rdev);
+ if (err == -1) {
+ goto out;
}
err = local_post_create_passthrough(fs_ctx, path, credp);
if (err == -1) {
goto err_end;
}
}
- return err;
+ goto out;
err_end:
- remove(rpath(fs_ctx, path));
+ remove(rpath(fs_ctx, path, buffer));
errno = serrno;
+out:
+ v9fs_string_free(&fullname);
return err;
}
-static int local_mkdir(FsContext *fs_ctx, const char *path, FsCred *credp)
+static int local_mkdir(FsContext *fs_ctx, V9fsPath *dir_path,
+ const char *name, FsCred *credp)
{
+ char *path;
int err = -1;
int serrno = 0;
+ V9fsString fullname;
+ char buffer[PATH_MAX];
+
+ v9fs_string_init(&fullname);
+ v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
+ path = fullname.data;
/* Determine the security model */
- if (fs_ctx->fs_sm == SM_MAPPED) {
- err = mkdir(rpath(fs_ctx, path), SM_LOCAL_DIR_MODE_BITS);
+ if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
+ err = mkdir(rpath(fs_ctx, path, buffer), SM_LOCAL_DIR_MODE_BITS);
if (err == -1) {
- return err;
+ goto out;
}
credp->fc_mode = credp->fc_mode|S_IFDIR;
- err = local_set_xattr(rpath(fs_ctx, path), credp);
+ err = local_set_xattr(rpath(fs_ctx, path, buffer), credp);
if (err == -1) {
serrno = errno;
goto err_end;
}
- } else if ((fs_ctx->fs_sm == SM_PASSTHROUGH) ||
- (fs_ctx->fs_sm == SM_NONE)) {
- err = mkdir(rpath(fs_ctx, path), credp->fc_mode);
+ } else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) {
+ err = mkdir(rpath(fs_ctx, path, buffer), SM_LOCAL_DIR_MODE_BITS);
if (err == -1) {
- return err;
+ goto out;
+ }
+ credp->fc_mode = credp->fc_mode|S_IFDIR;
+ err = local_set_mapped_file_attr(fs_ctx, path, credp);
+ if (err == -1) {
+ serrno = errno;
+ goto err_end;
+ }
+ } else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) ||
+ (fs_ctx->export_flags & V9FS_SM_NONE)) {
+ err = mkdir(rpath(fs_ctx, path, buffer), credp->fc_mode);
+ if (err == -1) {
+ goto out;
}
err = local_post_create_passthrough(fs_ctx, path, credp);
if (err == -1) {
goto err_end;
}
}
- return err;
+ goto out;
err_end:
- remove(rpath(fs_ctx, path));
+ remove(rpath(fs_ctx, path, buffer));
errno = serrno;
+out:
+ v9fs_string_free(&fullname);
return err;
}
-static int local_fstat(FsContext *fs_ctx, int fd, struct stat *stbuf)
+static int local_fstat(FsContext *fs_ctx, int fid_type,
+ V9fsFidOpenState *fs, struct stat *stbuf)
{
- int err;
+ int err, fd;
+
+ if (fid_type == P9_FID_DIR) {
+ fd = dirfd(fs->dir);
+ } else {
+ fd = fs->fd;
+ }
+
err = fstat(fd, stbuf);
if (err) {
return err;
}
- if (fs_ctx->fs_sm == SM_MAPPED) {
+ if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
/* Actual credentials are part of extended attrs */
uid_t tmp_uid;
gid_t tmp_gid;
mode_t tmp_mode;
dev_t tmp_dev;
- if (fgetxattr(fd, "user.virtfs.uid", &tmp_uid, sizeof(uid_t)) > 0) {
+ if (fgetxattr(fd, "user.virtfs.uid",
+ &tmp_uid, sizeof(uid_t)) > 0) {
stbuf->st_uid = tmp_uid;
}
- if (fgetxattr(fd, "user.virtfs.gid", &tmp_gid, sizeof(gid_t)) > 0) {
+ if (fgetxattr(fd, "user.virtfs.gid",
+ &tmp_gid, sizeof(gid_t)) > 0) {
stbuf->st_gid = tmp_gid;
}
- if (fgetxattr(fd, "user.virtfs.mode", &tmp_mode, sizeof(mode_t)) > 0) {
+ if (fgetxattr(fd, "user.virtfs.mode",
+ &tmp_mode, sizeof(mode_t)) > 0) {
stbuf->st_mode = tmp_mode;
}
- if (fgetxattr(fd, "user.virtfs.rdev", &tmp_dev, sizeof(dev_t)) > 0) {
+ if (fgetxattr(fd, "user.virtfs.rdev",
+ &tmp_dev, sizeof(dev_t)) > 0) {
stbuf->st_rdev = tmp_dev;
}
+ } else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) {
+ errno = EOPNOTSUPP;
+ return -1;
}
return err;
}
-static int local_open2(FsContext *fs_ctx, const char *path, int flags,
- FsCred *credp)
+static int local_open2(FsContext *fs_ctx, V9fsPath *dir_path, const char *name,
+ int flags, FsCred *credp, V9fsFidOpenState *fs)
{
+ char *path;
int fd = -1;
int err = -1;
int serrno = 0;
+ V9fsString fullname;
+ char buffer[PATH_MAX];
+
+ v9fs_string_init(&fullname);
+ v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
+ path = fullname.data;
/* Determine the security model */
- if (fs_ctx->fs_sm == SM_MAPPED) {
- fd = open(rpath(fs_ctx, path), flags, SM_LOCAL_MODE_BITS);
+ if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
+ fd = open(rpath(fs_ctx, path, buffer), flags, SM_LOCAL_MODE_BITS);
if (fd == -1) {
- return fd;
+ err = fd;
+ goto out;
}
credp->fc_mode = credp->fc_mode|S_IFREG;
/* Set cleint credentials in xattr */
- err = local_set_xattr(rpath(fs_ctx, path), credp);
+ err = local_set_xattr(rpath(fs_ctx, path, buffer), credp);
+ if (err == -1) {
+ serrno = errno;
+ goto err_end;
+ }
+ } else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) {
+ fd = open(rpath(fs_ctx, path, buffer), flags, SM_LOCAL_MODE_BITS);
+ if (fd == -1) {
+ err = fd;
+ goto out;
+ }
+ credp->fc_mode = credp->fc_mode|S_IFREG;
+ /* Set client credentials in .virtfs_metadata directory files */
+ err = local_set_mapped_file_attr(fs_ctx, path, credp);
if (err == -1) {
serrno = errno;
goto err_end;
}
- } else if ((fs_ctx->fs_sm == SM_PASSTHROUGH) ||
- (fs_ctx->fs_sm == SM_NONE)) {
- fd = open(rpath(fs_ctx, path), flags, credp->fc_mode);
+ } else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) ||
+ (fs_ctx->export_flags & V9FS_SM_NONE)) {
+ fd = open(rpath(fs_ctx, path, buffer), flags, credp->fc_mode);
if (fd == -1) {
- return fd;
+ err = fd;
+ goto out;
}
err = local_post_create_passthrough(fs_ctx, path, credp);
if (err == -1) {
goto err_end;
}
}
- return fd;
+ err = fd;
+ fs->fd = fd;
+ goto out;
err_end:
close(fd);
- remove(rpath(fs_ctx, path));
+ remove(rpath(fs_ctx, path, buffer));
errno = serrno;
+out:
+ v9fs_string_free(&fullname);
return err;
}
static int local_symlink(FsContext *fs_ctx, const char *oldpath,
- const char *newpath, FsCred *credp)
+ V9fsPath *dir_path, const char *name, FsCred *credp)
{
int err = -1;
int serrno = 0;
+ char *newpath;
+ V9fsString fullname;
+ char buffer[PATH_MAX];
+
+ v9fs_string_init(&fullname);
+ v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
+ newpath = fullname.data;
/* Determine the security model */
- if (fs_ctx->fs_sm == SM_MAPPED) {
+ if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
int fd;
ssize_t oldpath_size, write_size;
- fd = open(rpath(fs_ctx, newpath), O_CREAT|O_EXCL|O_RDWR,
+ fd = open(rpath(fs_ctx, newpath, buffer), O_CREAT|O_EXCL|O_RDWR,
SM_LOCAL_MODE_BITS);
if (fd == -1) {
- return fd;
+ err = fd;
+ goto out;
+ }
+ /* Write the oldpath (target) to the file. */
+ oldpath_size = strlen(oldpath);
+ do {
+ write_size = write(fd, (void *)oldpath, oldpath_size);
+ } while (write_size == -1 && errno == EINTR);
+
+ if (write_size != oldpath_size) {
+ serrno = errno;
+ close(fd);
+ err = -1;
+ goto err_end;
+ }
+ close(fd);
+ /* Set cleint credentials in symlink's xattr */
+ credp->fc_mode = credp->fc_mode|S_IFLNK;
+ err = local_set_xattr(rpath(fs_ctx, newpath, buffer), credp);
+ if (err == -1) {
+ serrno = errno;
+ goto err_end;
+ }
+ } else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) {
+ int fd;
+ ssize_t oldpath_size, write_size;
+ fd = open(rpath(fs_ctx, newpath, buffer), O_CREAT|O_EXCL|O_RDWR,
+ SM_LOCAL_MODE_BITS);
+ if (fd == -1) {
+ err = fd;
+ goto out;
}
/* Write the oldpath (target) to the file. */
oldpath_size = strlen(oldpath);
close(fd);
/* Set cleint credentials in symlink's xattr */
credp->fc_mode = credp->fc_mode|S_IFLNK;
- err = local_set_xattr(rpath(fs_ctx, newpath), credp);
+ err = local_set_mapped_file_attr(fs_ctx, newpath, credp);
if (err == -1) {
serrno = errno;
goto err_end;
}
- } else if ((fs_ctx->fs_sm == SM_PASSTHROUGH) ||
- (fs_ctx->fs_sm == SM_NONE)) {
- err = symlink(oldpath, rpath(fs_ctx, newpath));
+ } else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) ||
+ (fs_ctx->export_flags & V9FS_SM_NONE)) {
+ err = symlink(oldpath, rpath(fs_ctx, newpath, buffer));
if (err) {
- return err;
+ goto out;
}
- err = lchown(rpath(fs_ctx, newpath), credp->fc_uid, credp->fc_gid);
+ err = lchown(rpath(fs_ctx, newpath, buffer), credp->fc_uid,
+ credp->fc_gid);
if (err == -1) {
/*
* If we fail to change ownership and if we are
* using security model none. Ignore the error
*/
- if (fs_ctx->fs_sm != SM_NONE) {
+ if ((fs_ctx->export_flags & V9FS_SEC_MASK) != V9FS_SM_NONE) {
serrno = errno;
goto err_end;
} else
err = 0;
}
}
- return err;
+ goto out;
err_end:
- remove(rpath(fs_ctx, newpath));
+ remove(rpath(fs_ctx, newpath, buffer));
errno = serrno;
+out:
+ v9fs_string_free(&fullname);
return err;
}
-static int local_link(FsContext *ctx, const char *oldpath, const char *newpath)
+static int local_link(FsContext *ctx, V9fsPath *oldpath,
+ V9fsPath *dirpath, const char *name)
{
- char *tmp = qemu_strdup(rpath(ctx, oldpath));
- int err, serrno = 0;
+ int ret;
+ V9fsString newpath;
+ char buffer[PATH_MAX], buffer1[PATH_MAX];
- if (tmp == NULL) {
- return -ENOMEM;
- }
+ v9fs_string_init(&newpath);
+ v9fs_string_sprintf(&newpath, "%s/%s", dirpath->data, name);
- err = link(tmp, rpath(ctx, newpath));
- if (err == -1) {
- serrno = errno;
- }
+ ret = link(rpath(ctx, oldpath->data, buffer),
+ rpath(ctx, newpath.data, buffer1));
- qemu_free(tmp);
-
- if (err == -1) {
- errno = serrno;
+ /* now link the virtfs_metadata files */
+ if (!ret && (ctx->export_flags & V9FS_SM_MAPPED_FILE)) {
+ /* Link the .virtfs_metadata files. Create the metada directory */
+ ret = local_create_mapped_attr_dir(ctx, newpath.data);
+ if (ret < 0) {
+ goto err_out;
+ }
+ ret = link(local_mapped_attr_path(ctx, oldpath->data, buffer),
+ local_mapped_attr_path(ctx, newpath.data, buffer1));
+ if (ret < 0 && errno != ENOENT) {
+ goto err_out;
+ }
}
-
- return err;
+err_out:
+ v9fs_string_free(&newpath);
+ return ret;
}
-static int local_truncate(FsContext *ctx, const char *path, off_t size)
+static int local_truncate(FsContext *ctx, V9fsPath *fs_path, off_t size)
{
- return truncate(rpath(ctx, path), size);
+ char buffer[PATH_MAX];
+ char *path = fs_path->data;
+
+ return truncate(rpath(ctx, path, buffer), size);
}
static int local_rename(FsContext *ctx, const char *oldpath,
const char *newpath)
{
- char *tmp;
int err;
+ char buffer[PATH_MAX], buffer1[PATH_MAX];
- tmp = qemu_strdup(rpath(ctx, oldpath));
-
- err = rename(tmp, rpath(ctx, newpath));
- if (err == -1) {
- int serrno = errno;
- qemu_free(tmp);
- errno = serrno;
- } else {
- qemu_free(tmp);
+ if (ctx->export_flags & V9FS_SM_MAPPED_FILE) {
+ err = local_create_mapped_attr_dir(ctx, newpath);
+ if (err < 0) {
+ return err;
+ }
+ /* rename the .virtfs_metadata files */
+ err = rename(local_mapped_attr_path(ctx, oldpath, buffer),
+ local_mapped_attr_path(ctx, newpath, buffer1));
+ if (err < 0 && errno != ENOENT) {
+ return err;
+ }
}
-
- return err;
-
+ return rename(rpath(ctx, oldpath, buffer), rpath(ctx, newpath, buffer1));
}
-static int local_chown(FsContext *fs_ctx, const char *path, FsCred *credp)
+static int local_chown(FsContext *fs_ctx, V9fsPath *fs_path, FsCred *credp)
{
+ char buffer[PATH_MAX];
+ char *path = fs_path->data;
+
if ((credp->fc_uid == -1 && credp->fc_gid == -1) ||
- (fs_ctx->fs_sm == SM_PASSTHROUGH)) {
- return lchown(rpath(fs_ctx, path), credp->fc_uid, credp->fc_gid);
- } else if (fs_ctx->fs_sm == SM_MAPPED) {
- return local_set_xattr(rpath(fs_ctx, path), credp);
- } else if ((fs_ctx->fs_sm == SM_PASSTHROUGH) ||
- (fs_ctx->fs_sm == SM_NONE)) {
- return lchown(rpath(fs_ctx, path), credp->fc_uid, credp->fc_gid);
+ (fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) ||
+ (fs_ctx->export_flags & V9FS_SM_NONE)) {
+ return lchown(rpath(fs_ctx, path, buffer),
+ credp->fc_uid, credp->fc_gid);
+ } else if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
+ return local_set_xattr(rpath(fs_ctx, path, buffer), credp);
+ } else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) {
+ return local_set_mapped_file_attr(fs_ctx, path, credp);
}
return -1;
}
-static int local_utimensat(FsContext *s, const char *path,
+static int local_utimensat(FsContext *s, V9fsPath *fs_path,
const struct timespec *buf)
{
- return qemu_utimensat(AT_FDCWD, rpath(s, path), buf, AT_SYMLINK_NOFOLLOW);
+ char buffer[PATH_MAX];
+ char *path = fs_path->data;
+
+ return qemu_utimens(rpath(s, path, buffer), buf);
}
static int local_remove(FsContext *ctx, const char *path)
{
- return remove(rpath(ctx, path));
+ int err;
+ struct stat stbuf;
+ char buffer[PATH_MAX];
+
+ if (ctx->export_flags & V9FS_SM_MAPPED_FILE) {
+ err = lstat(rpath(ctx, path, buffer), &stbuf);
+ if (err) {
+ goto err_out;
+ }
+ /*
+ * If directory remove .virtfs_metadata contained in the
+ * directory
+ */
+ if (S_ISDIR(stbuf.st_mode)) {
+ sprintf(buffer, "%s/%s/%s", ctx->fs_root, path, VIRTFS_META_DIR);
+ err = remove(buffer);
+ if (err < 0 && errno != ENOENT) {
+ /*
+ * We didn't had the .virtfs_metadata file. May be file created
+ * in non-mapped mode ?. Ignore ENOENT.
+ */
+ goto err_out;
+ }
+ }
+ /*
+ * Now remove the name from parent directory
+ * .virtfs_metadata directory
+ */
+ err = remove(local_mapped_attr_path(ctx, path, buffer));
+ if (err < 0 && errno != ENOENT) {
+ /*
+ * We didn't had the .virtfs_metadata file. May be file created
+ * in non-mapped mode ?. Ignore ENOENT.
+ */
+ goto err_out;
+ }
+ }
+ return remove(rpath(ctx, path, buffer));
+err_out:
+ return err;
}
-static int local_fsync(FsContext *ctx, int fd, int datasync)
+static int local_fsync(FsContext *ctx, int fid_type,
+ V9fsFidOpenState *fs, int datasync)
{
+ int fd;
+
+ if (fid_type == P9_FID_DIR) {
+ fd = dirfd(fs->dir);
+ } else {
+ fd = fs->fd;
+ }
+
if (datasync) {
return qemu_fdatasync(fd);
} else {
}
}
-static int local_statfs(FsContext *s, const char *path, struct statfs *stbuf)
+static int local_statfs(FsContext *s, V9fsPath *fs_path, struct statfs *stbuf)
{
- return statfs(rpath(s, path), stbuf);
+ char buffer[PATH_MAX];
+ char *path = fs_path->data;
+
+ return statfs(rpath(s, path, buffer), stbuf);
}
-static ssize_t local_lgetxattr(FsContext *ctx, const char *path,
+static ssize_t local_lgetxattr(FsContext *ctx, V9fsPath *fs_path,
const char *name, void *value, size_t size)
{
+ char *path = fs_path->data;
+
return v9fs_get_xattr(ctx, path, name, value, size);
}
-static ssize_t local_llistxattr(FsContext *ctx, const char *path,
+static ssize_t local_llistxattr(FsContext *ctx, V9fsPath *fs_path,
void *value, size_t size)
{
+ char *path = fs_path->data;
+
return v9fs_list_xattr(ctx, path, value, size);
}
-static int local_lsetxattr(FsContext *ctx, const char *path, const char *name,
+static int local_lsetxattr(FsContext *ctx, V9fsPath *fs_path, const char *name,
void *value, size_t size, int flags)
{
+ char *path = fs_path->data;
+
return v9fs_set_xattr(ctx, path, name, value, size, flags);
}
-static int local_lremovexattr(FsContext *ctx,
- const char *path, const char *name)
+static int local_lremovexattr(FsContext *ctx, V9fsPath *fs_path,
+ const char *name)
{
+ char *path = fs_path->data;
+
return v9fs_remove_xattr(ctx, path, name);
}
+static int local_name_to_path(FsContext *ctx, V9fsPath *dir_path,
+ const char *name, V9fsPath *target)
+{
+ if (dir_path) {
+ v9fs_string_sprintf((V9fsString *)target, "%s/%s",
+ dir_path->data, name);
+ } else {
+ v9fs_string_sprintf((V9fsString *)target, "%s", name);
+ }
+ /* Bump the size for including terminating NULL */
+ target->size++;
+ return 0;
+}
+
+static int local_renameat(FsContext *ctx, V9fsPath *olddir,
+ const char *old_name, V9fsPath *newdir,
+ const char *new_name)
+{
+ int ret;
+ V9fsString old_full_name, new_full_name;
+
+ v9fs_string_init(&old_full_name);
+ v9fs_string_init(&new_full_name);
+
+ v9fs_string_sprintf(&old_full_name, "%s/%s", olddir->data, old_name);
+ v9fs_string_sprintf(&new_full_name, "%s/%s", newdir->data, new_name);
+
+ ret = local_rename(ctx, old_full_name.data, new_full_name.data);
+ v9fs_string_free(&old_full_name);
+ v9fs_string_free(&new_full_name);
+ return ret;
+}
+
+static int local_unlinkat(FsContext *ctx, V9fsPath *dir,
+ const char *name, int flags)
+{
+ int ret;
+ V9fsString fullname;
+ char buffer[PATH_MAX];
+
+ v9fs_string_init(&fullname);
+
+ v9fs_string_sprintf(&fullname, "%s/%s", dir->data, name);
+ if (ctx->export_flags & V9FS_SM_MAPPED_FILE) {
+ if (flags == AT_REMOVEDIR) {
+ /*
+ * If directory remove .virtfs_metadata contained in the
+ * directory
+ */
+ sprintf(buffer, "%s/%s/%s", ctx->fs_root,
+ fullname.data, VIRTFS_META_DIR);
+ ret = remove(buffer);
+ if (ret < 0 && errno != ENOENT) {
+ /*
+ * We didn't had the .virtfs_metadata file. May be file created
+ * in non-mapped mode ?. Ignore ENOENT.
+ */
+ goto err_out;
+ }
+ }
+ /*
+ * Now remove the name from parent directory
+ * .virtfs_metadata directory.
+ */
+ ret = remove(local_mapped_attr_path(ctx, fullname.data, buffer));
+ if (ret < 0 && errno != ENOENT) {
+ /*
+ * We didn't had the .virtfs_metadata file. May be file created
+ * in non-mapped mode ?. Ignore ENOENT.
+ */
+ goto err_out;
+ }
+ }
+ /* Remove the name finally */
+ ret = remove(rpath(ctx, fullname.data, buffer));
+ v9fs_string_free(&fullname);
+
+err_out:
+ return ret;
+}
+
+static int local_ioc_getversion(FsContext *ctx, V9fsPath *path,
+ mode_t st_mode, uint64_t *st_gen)
+{
+ int err;
+#ifdef FS_IOC_GETVERSION
+ V9fsFidOpenState fid_open;
+
+ /*
+ * Do not try to open special files like device nodes, fifos etc
+ * We can get fd for regular files and directories only
+ */
+ if (!S_ISREG(st_mode) && !S_ISDIR(st_mode)) {
+ return 0;
+ }
+ err = local_open(ctx, path, O_RDONLY, &fid_open);
+ if (err < 0) {
+ return err;
+ }
+ err = ioctl(fid_open.fd, FS_IOC_GETVERSION, st_gen);
+ local_close(ctx, &fid_open);
+#else
+ err = -ENOTTY;
+#endif
+ return err;
+}
+
+static int local_init(FsContext *ctx)
+{
+ int err = 0;
+ struct statfs stbuf;
+
+ if (ctx->export_flags & V9FS_SM_PASSTHROUGH) {
+ ctx->xops = passthrough_xattr_ops;
+ } else if (ctx->export_flags & V9FS_SM_MAPPED) {
+ ctx->xops = mapped_xattr_ops;
+ } else if (ctx->export_flags & V9FS_SM_NONE) {
+ ctx->xops = none_xattr_ops;
+ } else if (ctx->export_flags & V9FS_SM_MAPPED_FILE) {
+ /*
+ * xattr operation for mapped-file and passthrough
+ * remain same.
+ */
+ ctx->xops = passthrough_xattr_ops;
+ }
+ ctx->export_flags |= V9FS_PATHNAME_FSCONTEXT;
+#ifdef FS_IOC_GETVERSION
+ /*
+ * use ioc_getversion only if the iocl is definied
+ */
+ err = statfs(ctx->fs_root, &stbuf);
+ if (!err) {
+ switch (stbuf.f_type) {
+ case EXT2_SUPER_MAGIC:
+ case BTRFS_SUPER_MAGIC:
+ case REISERFS_SUPER_MAGIC:
+ case XFS_SUPER_MAGIC:
+ ctx->exops.get_st_gen = local_ioc_getversion;
+ break;
+ }
+ }
+#endif
+ return err;
+}
+
+static int local_parse_opts(QemuOpts *opts, struct FsDriverEntry *fse)
+{
+ const char *sec_model = qemu_opt_get(opts, "security_model");
+ const char *path = qemu_opt_get(opts, "path");
+
+ if (!sec_model) {
+ fprintf(stderr, "security model not specified, "
+ "local fs needs security model\nvalid options are:"
+ "\tsecurity_model=[passthrough|mapped|none]\n");
+ return -1;
+ }
+
+ if (!strcmp(sec_model, "passthrough")) {
+ fse->export_flags |= V9FS_SM_PASSTHROUGH;
+ } else if (!strcmp(sec_model, "mapped") ||
+ !strcmp(sec_model, "mapped-xattr")) {
+ fse->export_flags |= V9FS_SM_MAPPED;
+ } else if (!strcmp(sec_model, "none")) {
+ fse->export_flags |= V9FS_SM_NONE;
+ } else if (!strcmp(sec_model, "mapped-file")) {
+ fse->export_flags |= V9FS_SM_MAPPED_FILE;
+ } else {
+ fprintf(stderr, "Invalid security model %s specified, valid options are"
+ "\n\t [passthrough|mapped-xattr|mapped-file|none]\n",
+ sec_model);
+ return -1;
+ }
+
+ if (!path) {
+ fprintf(stderr, "fsdev: No path specified.\n");
+ return -1;
+ }
+ fse->path = g_strdup(path);
+
+ return 0;
+}
FileOperations local_ops = {
+ .parse_opts = local_parse_opts,
+ .init = local_init,
.lstat = local_lstat,
.readlink = local_readlink,
.close = local_close,
.opendir = local_opendir,
.rewinddir = local_rewinddir,
.telldir = local_telldir,
- .readdir = local_readdir,
+ .readdir_r = local_readdir_r,
.seekdir = local_seekdir,
.preadv = local_preadv,
.pwritev = local_pwritev,
.llistxattr = local_llistxattr,
.lsetxattr = local_lsetxattr,
.lremovexattr = local_lremovexattr,
+ .name_to_path = local_name_to_path,
+ .renameat = local_renameat,
+ .unlinkat = local_unlinkat,
};
projects / qemu.git / blobdiff