X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=qemu%2Fhw%2F9pfs%2Fvirtio-9p-handle.c;fp=qemu%2Fhw%2F9pfs%2Fvirtio-9p-handle.c;h=0000000000000000000000000000000000000000;hb=437fd90c0250dee670290f9b714253671a990160;hp=13eabb98a401d545d38279818839448a509db742;hpb=5bbd6fe9b8bab2a93e548c5a53b032d1939eec05;p=kvmfornfv.git

diff --git a/qemu/hw/9pfs/virtio-9p-handle.c b/qemu/hw/9pfs/virtio-9p-handle.c
deleted file mode 100644
index 13eabb98a..000000000
--- a/qemu/hw/9pfs/virtio-9p-handle.c
+++ /dev/null
@@ -1,708 +0,0 @@
-/*
- * Virtio 9p handle callback
- *
- * Copyright IBM, Corp. 2011
- *
- * Authors:
- *    Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
- *
- * This work is licensed under the terms of the GNU GPL, version 2.  See
- * the COPYING file in the top-level directory.
- *
- */
-
-#include "hw/virtio/virtio.h"
-#include "virtio-9p.h"
-#include "virtio-9p-xattr.h"
-#include <arpa/inet.h>
-#include <pwd.h>
-#include <grp.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-#include "qemu/xattr.h"
-#include <unistd.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
-
-struct handle_data {
-    int mountfd;
-    int handle_bytes;
-};
-
-static inline int name_to_handle(int dirfd, const char *name,
-                                 struct file_handle *fh, int *mnt_id, int flags)
-{
-    return name_to_handle_at(dirfd, name, fh, mnt_id, flags);
-}
-
-static inline int open_by_handle(int mountfd, const char *fh, int flags)
-{
-    return open_by_handle_at(mountfd, (struct file_handle *)fh, flags);
-}
-
-static int handle_update_file_cred(int dirfd, const char *name, FsCred *credp)
-{
-    int fd, ret;
-    fd = openat(dirfd, name, O_NONBLOCK | O_NOFOLLOW);
-    if (fd < 0) {
-        return fd;
-    }
-    ret = fchownat(fd, "", credp->fc_uid, credp->fc_gid, AT_EMPTY_PATH);
-    if (ret < 0) {
-        goto err_out;
-    }
-    ret = fchmod(fd, credp->fc_mode & 07777);
-err_out:
-    close(fd);
-    return ret;
-}
-
-
-static int handle_lstat(FsContext *fs_ctx, V9fsPath *fs_path,
-                        struct stat *stbuf)
-{
-    int fd, ret;
-    struct handle_data *data = (struct handle_data *)fs_ctx->private;
-
-    fd = open_by_handle(data->mountfd, fs_path->data, O_PATH);
-    if (fd < 0) {
-        return fd;
-    }
-    ret = fstatat(fd, "", stbuf, AT_EMPTY_PATH);
-    close(fd);
-    return ret;
-}
-
-static ssize_t handle_readlink(FsContext *fs_ctx, V9fsPath *fs_path,
-                               char *buf, size_t bufsz)
-{
-    int fd, ret;
-    struct handle_data *data = (struct handle_data *)fs_ctx->private;
-
-    fd = open_by_handle(data->mountfd, fs_path->data, O_PATH);
-    if (fd < 0) {
-        return fd;
-    }
-    ret = readlinkat(fd, "", buf, bufsz);
-    close(fd);
-    return ret;
-}
-
-static int handle_close(FsContext *ctx, V9fsFidOpenState *fs)
-{
-    return close(fs->fd);
-}
-
-static int handle_closedir(FsContext *ctx, V9fsFidOpenState *fs)
-{
-    return closedir(fs->dir);
-}
-
-static int handle_open(FsContext *ctx, V9fsPath *fs_path,
-                       int flags, V9fsFidOpenState *fs)
-{
-    struct handle_data *data = (struct handle_data *)ctx->private;
-
-    fs->fd = open_by_handle(data->mountfd, fs_path->data, flags);
-    return fs->fd;
-}
-
-static int handle_opendir(FsContext *ctx,
-                          V9fsPath *fs_path, V9fsFidOpenState *fs)
-{
-    int ret;
-    ret = handle_open(ctx, fs_path, O_DIRECTORY, fs);
-    if (ret < 0) {
-        return -1;
-    }
-    fs->dir = fdopendir(ret);
-    if (!fs->dir) {
-        return -1;
-    }
-    return 0;
-}
-
-static void handle_rewinddir(FsContext *ctx, V9fsFidOpenState *fs)
-{
-    rewinddir(fs->dir);
-}
-
-static off_t handle_telldir(FsContext *ctx, V9fsFidOpenState *fs)
-{
-    return telldir(fs->dir);
-}
-
-static int handle_readdir_r(FsContext *ctx, V9fsFidOpenState *fs,
-                            struct dirent *entry,
-                            struct dirent **result)
-{
-    return readdir_r(fs->dir, entry, result);
-}
-
-static void handle_seekdir(FsContext *ctx, V9fsFidOpenState *fs, off_t off)
-{
-    seekdir(fs->dir, off);
-}
-
-static ssize_t handle_preadv(FsContext *ctx, V9fsFidOpenState *fs,
-                             const struct iovec *iov,
-                             int iovcnt, off_t offset)
-{
-#ifdef CONFIG_PREADV
-    return preadv(fs->fd, iov, iovcnt, offset);
-#else
-    int err = lseek(fs->fd, offset, SEEK_SET);
-    if (err == -1) {
-        return err;
-    } else {
-        return readv(fs->fd, iov, iovcnt);
-    }
-#endif
-}
-
-static ssize_t handle_pwritev(FsContext *ctx, V9fsFidOpenState *fs,
-                              const struct iovec *iov,
-                              int iovcnt, off_t offset)
-{
-    ssize_t ret;
-#ifdef CONFIG_PREADV
-    ret = pwritev(fs->fd, iov, iovcnt, offset);
-#else
-    int err = lseek(fs->fd, offset, SEEK_SET);
-    if (err == -1) {
-        return err;
-    } else {
-        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 handle_chmod(FsContext *fs_ctx, V9fsPath *fs_path, FsCred *credp)
-{
-    int fd, ret;
-    struct handle_data *data = (struct handle_data *)fs_ctx->private;
-
-    fd = open_by_handle(data->mountfd, fs_path->data, O_NONBLOCK);
-    if (fd < 0) {
-        return fd;
-    }
-    ret = fchmod(fd, credp->fc_mode);
-    close(fd);
-    return ret;
-}
-
-static int handle_mknod(FsContext *fs_ctx, V9fsPath *dir_path,
-                       const char *name, FsCred *credp)
-{
-    int dirfd, ret;
-    struct handle_data *data = (struct handle_data *)fs_ctx->private;
-
-    dirfd = open_by_handle(data->mountfd, dir_path->data, O_PATH);
-    if (dirfd < 0) {
-        return dirfd;
-    }
-    ret = mknodat(dirfd, name, credp->fc_mode, credp->fc_rdev);
-    if (!ret) {
-        ret = handle_update_file_cred(dirfd, name, credp);
-    }
-    close(dirfd);
-    return ret;
-}
-
-static int handle_mkdir(FsContext *fs_ctx, V9fsPath *dir_path,
-                       const char *name, FsCred *credp)
-{
-    int dirfd, ret;
-    struct handle_data *data = (struct handle_data *)fs_ctx->private;
-
-    dirfd = open_by_handle(data->mountfd, dir_path->data, O_PATH);
-    if (dirfd < 0) {
-        return dirfd;
-    }
-    ret = mkdirat(dirfd, name, credp->fc_mode);
-    if (!ret) {
-        ret = handle_update_file_cred(dirfd, name, credp);
-    }
-    close(dirfd);
-    return ret;
-}
-
-static int handle_fstat(FsContext *fs_ctx, int fid_type,
-                        V9fsFidOpenState *fs, struct stat *stbuf)
-{
-    int fd;
-
-    if (fid_type == P9_FID_DIR) {
-        fd = dirfd(fs->dir);
-    } else {
-        fd = fs->fd;
-    }
-    return fstat(fd, stbuf);
-}
-
-static int handle_open2(FsContext *fs_ctx, V9fsPath *dir_path, const char *name,
-                        int flags, FsCred *credp, V9fsFidOpenState *fs)
-{
-    int ret;
-    int dirfd, fd;
-    struct handle_data *data = (struct handle_data *)fs_ctx->private;
-
-    dirfd = open_by_handle(data->mountfd, dir_path->data, O_PATH);
-    if (dirfd < 0) {
-        return dirfd;
-    }
-    fd = openat(dirfd, name, flags | O_NOFOLLOW, credp->fc_mode);
-    if (fd >= 0) {
-        ret = handle_update_file_cred(dirfd, name, credp);
-        if (ret < 0) {
-            close(fd);
-            fd = ret;
-        } else {
-            fs->fd = fd;
-        }
-    }
-    close(dirfd);
-    return fd;
-}
-
-
-static int handle_symlink(FsContext *fs_ctx, const char *oldpath,
-                          V9fsPath *dir_path, const char *name, FsCred *credp)
-{
-    int fd, dirfd, ret;
-    struct handle_data *data = (struct handle_data *)fs_ctx->private;
-
-    dirfd = open_by_handle(data->mountfd, dir_path->data, O_PATH);
-    if (dirfd < 0) {
-        return dirfd;
-    }
-    ret = symlinkat(oldpath, dirfd, name);
-    if (!ret) {
-        fd = openat(dirfd, name, O_PATH | O_NOFOLLOW);
-        if (fd < 0) {
-            ret = fd;
-            goto err_out;
-        }
-        ret = fchownat(fd, "", credp->fc_uid, credp->fc_gid, AT_EMPTY_PATH);
-        close(fd);
-    }
-err_out:
-    close(dirfd);
-    return ret;
-}
-
-static int handle_link(FsContext *ctx, V9fsPath *oldpath,
-                       V9fsPath *dirpath, const char *name)
-{
-    int oldfd, newdirfd, ret;
-    struct handle_data *data = (struct handle_data *)ctx->private;
-
-    oldfd = open_by_handle(data->mountfd, oldpath->data, O_PATH);
-    if (oldfd < 0) {
-        return oldfd;
-    }
-    newdirfd = open_by_handle(data->mountfd, dirpath->data, O_PATH);
-    if (newdirfd < 0) {
-        close(oldfd);
-        return newdirfd;
-    }
-    ret = linkat(oldfd, "", newdirfd, name, AT_EMPTY_PATH);
-    close(newdirfd);
-    close(oldfd);
-    return ret;
-}
-
-static int handle_truncate(FsContext *ctx, V9fsPath *fs_path, off_t size)
-{
-    int fd, ret;
-    struct handle_data *data = (struct handle_data *)ctx->private;
-
-    fd = open_by_handle(data->mountfd, fs_path->data, O_NONBLOCK | O_WRONLY);
-    if (fd < 0) {
-        return fd;
-    }
-    ret = ftruncate(fd, size);
-    close(fd);
-    return ret;
-}
-
-static int handle_rename(FsContext *ctx, const char *oldpath,
-                         const char *newpath)
-{
-    errno = EOPNOTSUPP;
-    return -1;
-}
-
-static int handle_chown(FsContext *fs_ctx, V9fsPath *fs_path, FsCred *credp)
-{
-    int fd, ret;
-    struct handle_data *data = (struct handle_data *)fs_ctx->private;
-
-    fd = open_by_handle(data->mountfd, fs_path->data, O_PATH);
-    if (fd < 0) {
-        return fd;
-    }
-    ret = fchownat(fd, "", credp->fc_uid, credp->fc_gid, AT_EMPTY_PATH);
-    close(fd);
-    return ret;
-}
-
-static int handle_utimensat(FsContext *ctx, V9fsPath *fs_path,
-                            const struct timespec *buf)
-{
-    int ret;
-#ifdef CONFIG_UTIMENSAT
-    int fd;
-    struct handle_data *data = (struct handle_data *)ctx->private;
-
-    fd = open_by_handle(data->mountfd, fs_path->data, O_NONBLOCK);
-    if (fd < 0) {
-        return fd;
-    }
-    ret = futimens(fd, buf);
-    close(fd);
-#else
-    ret = -1;
-    errno = ENOSYS;
-#endif
-    return ret;
-}
-
-static int handle_remove(FsContext *ctx, const char *path)
-{
-    errno = EOPNOTSUPP;
-    return -1;
-}
-
-static int handle_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 {
-        return fsync(fd);
-    }
-}
-
-static int handle_statfs(FsContext *ctx, V9fsPath *fs_path,
-                         struct statfs *stbuf)
-{
-    int fd, ret;
-    struct handle_data *data = (struct handle_data *)ctx->private;
-
-    fd = open_by_handle(data->mountfd, fs_path->data, O_NONBLOCK);
-    if (fd < 0) {
-        return fd;
-    }
-    ret = fstatfs(fd, stbuf);
-    close(fd);
-    return ret;
-}
-
-static ssize_t handle_lgetxattr(FsContext *ctx, V9fsPath *fs_path,
-                                const char *name, void *value, size_t size)
-{
-    int fd, ret;
-    struct handle_data *data = (struct handle_data *)ctx->private;
-
-    fd = open_by_handle(data->mountfd, fs_path->data, O_NONBLOCK);
-    if (fd < 0) {
-        return fd;
-    }
-    ret = fgetxattr(fd, name, value, size);
-    close(fd);
-    return ret;
-}
-
-static ssize_t handle_llistxattr(FsContext *ctx, V9fsPath *fs_path,
-                                 void *value, size_t size)
-{
-    int fd, ret;
-    struct handle_data *data = (struct handle_data *)ctx->private;
-
-    fd = open_by_handle(data->mountfd, fs_path->data, O_NONBLOCK);
-    if (fd < 0) {
-        return fd;
-    }
-    ret = flistxattr(fd, value, size);
-    close(fd);
-    return ret;
-}
-
-static int handle_lsetxattr(FsContext *ctx, V9fsPath *fs_path, const char *name,
-                            void *value, size_t size, int flags)
-{
-    int fd, ret;
-    struct handle_data *data = (struct handle_data *)ctx->private;
-
-    fd = open_by_handle(data->mountfd, fs_path->data, O_NONBLOCK);
-    if (fd < 0) {
-        return fd;
-    }
-    ret = fsetxattr(fd, name, value, size, flags);
-    close(fd);
-    return ret;
-}
-
-static int handle_lremovexattr(FsContext *ctx, V9fsPath *fs_path,
-                               const char *name)
-{
-    int fd, ret;
-    struct handle_data *data = (struct handle_data *)ctx->private;
-
-    fd = open_by_handle(data->mountfd, fs_path->data, O_NONBLOCK);
-    if (fd < 0) {
-        return fd;
-    }
-    ret = fremovexattr(fd, name);
-    close(fd);
-    return ret;
-}
-
-static int handle_name_to_path(FsContext *ctx, V9fsPath *dir_path,
-                              const char *name, V9fsPath *target)
-{
-    char *buffer;
-    struct file_handle *fh;
-    int dirfd, ret, mnt_id;
-    struct handle_data *data = (struct handle_data *)ctx->private;
-
-    /* "." and ".." are not allowed */
-    if (!strcmp(name, ".") || !strcmp(name, "..")) {
-        errno = EINVAL;
-        return -1;
-
-    }
-    if (dir_path) {
-        dirfd = open_by_handle(data->mountfd, dir_path->data, O_PATH);
-    } else {
-        /* relative to export root */
-        buffer = rpath(ctx, ".");
-        dirfd = open(buffer, O_DIRECTORY);
-        g_free(buffer);
-    }
-    if (dirfd < 0) {
-        return dirfd;
-    }
-    fh = g_malloc(sizeof(struct file_handle) + data->handle_bytes);
-    fh->handle_bytes = data->handle_bytes;
-    /* add a "./" at the beginning of the path */
-    buffer = g_strdup_printf("./%s", name);
-    /* flag = 0 imply don't follow symlink */
-    ret = name_to_handle(dirfd, buffer, fh, &mnt_id, 0);
-    if (!ret) {
-        target->data = (char *)fh;
-        target->size = sizeof(struct file_handle) + data->handle_bytes;
-    } else {
-        g_free(fh);
-    }
-    close(dirfd);
-    g_free(buffer);
-    return ret;
-}
-
-static int handle_renameat(FsContext *ctx, V9fsPath *olddir,
-                           const char *old_name, V9fsPath *newdir,
-                           const char *new_name)
-{
-    int olddirfd, newdirfd, ret;
-    struct handle_data *data = (struct handle_data *)ctx->private;
-
-    olddirfd = open_by_handle(data->mountfd, olddir->data, O_PATH);
-    if (olddirfd < 0) {
-        return olddirfd;
-    }
-    newdirfd = open_by_handle(data->mountfd, newdir->data, O_PATH);
-    if (newdirfd < 0) {
-        close(olddirfd);
-        return newdirfd;
-    }
-    ret = renameat(olddirfd, old_name, newdirfd, new_name);
-    close(newdirfd);
-    close(olddirfd);
-    return ret;
-}
-
-static int handle_unlinkat(FsContext *ctx, V9fsPath *dir,
-                           const char *name, int flags)
-{
-    int dirfd, ret;
-    struct handle_data *data = (struct handle_data *)ctx->private;
-    int rflags;
-
-    dirfd = open_by_handle(data->mountfd, dir->data, O_PATH);
-    if (dirfd < 0) {
-        return dirfd;
-    }
-
-    rflags = 0;
-    if (flags & P9_DOTL_AT_REMOVEDIR) {
-        rflags |= AT_REMOVEDIR;
-    }
-
-    ret = unlinkat(dirfd, name, rflags);
-
-    close(dirfd);
-    return ret;
-}
-
-static int handle_ioc_getversion(FsContext *ctx, V9fsPath *path,
-                                 mode_t st_mode, uint64_t *st_gen)
-{
-#ifdef FS_IOC_GETVERSION
-    int err;
-    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)) {
-        errno = ENOTTY;
-        return -1;
-    }
-    err = handle_open(ctx, path, O_RDONLY, &fid_open);
-    if (err < 0) {
-        return err;
-    }
-    err = ioctl(fid_open.fd, FS_IOC_GETVERSION, st_gen);
-    handle_close(ctx, &fid_open);
-    return err;
-#else
-    errno = ENOTTY;
-    return -1;
-#endif
-}
-
-static int handle_init(FsContext *ctx)
-{
-    int ret, mnt_id;
-    struct statfs stbuf;
-    struct file_handle fh;
-    struct handle_data *data = g_malloc(sizeof(struct handle_data));
-
-    data->mountfd = open(ctx->fs_root, O_DIRECTORY);
-    if (data->mountfd < 0) {
-        ret = data->mountfd;
-        goto err_out;
-    }
-    ret = statfs(ctx->fs_root, &stbuf);
-    if (!ret) {
-        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 = handle_ioc_getversion;
-            break;
-        }
-    }
-    memset(&fh, 0, sizeof(struct file_handle));
-    ret = name_to_handle(data->mountfd, ".", &fh, &mnt_id, 0);
-    if (ret && errno == EOVERFLOW) {
-        data->handle_bytes = fh.handle_bytes;
-        ctx->private = data;
-        ret = 0;
-        goto out;
-    }
-    /* we got 0 byte handle ? */
-    ret = -1;
-    close(data->mountfd);
-err_out:
-    g_free(data);
-out:
-    return ret;
-}
-
-static int handle_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, "Invalid argument security_model specified with handle fsdriver\n");
-        return -1;
-    }
-
-    if (!path) {
-        fprintf(stderr, "fsdev: No path specified.\n");
-        return -1;
-    }
-    fse->path = g_strdup(path);
-    return 0;
-
-}
-
-FileOperations handle_ops = {
-    .parse_opts   = handle_parse_opts,
-    .init         = handle_init,
-    .lstat        = handle_lstat,
-    .readlink     = handle_readlink,
-    .close        = handle_close,
-    .closedir     = handle_closedir,
-    .open         = handle_open,
-    .opendir      = handle_opendir,
-    .rewinddir    = handle_rewinddir,
-    .telldir      = handle_telldir,
-    .readdir_r    = handle_readdir_r,
-    .seekdir      = handle_seekdir,
-    .preadv       = handle_preadv,
-    .pwritev      = handle_pwritev,
-    .chmod        = handle_chmod,
-    .mknod        = handle_mknod,
-    .mkdir        = handle_mkdir,
-    .fstat        = handle_fstat,
-    .open2        = handle_open2,
-    .symlink      = handle_symlink,
-    .link         = handle_link,
-    .truncate     = handle_truncate,
-    .rename       = handle_rename,
-    .chown        = handle_chown,
-    .utimensat    = handle_utimensat,
-    .remove       = handle_remove,
-    .fsync        = handle_fsync,
-    .statfs       = handle_statfs,
-    .lgetxattr    = handle_lgetxattr,
-    .llistxattr   = handle_llistxattr,
-    .lsetxattr    = handle_lsetxattr,
-    .lremovexattr = handle_lremovexattr,
-    .name_to_path = handle_name_to_path,
-    .renameat     = handle_renameat,
-    .unlinkat     = handle_unlinkat,
-};