diff options
author | 2016-05-18 13:18:31 +0300 | |
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committer | 2016-05-18 13:42:15 +0300 | |
commit | 437fd90c0250dee670290f9b714253671a990160 (patch) | |
tree | b871786c360704244a07411c69fb58da9ead4a06 /qemu/hw/9pfs/virtio-9p-handle.c | |
parent | 5bbd6fe9b8bab2a93e548c5a53b032d1939eec05 (diff) |
These changes are the raw update to qemu-2.6.
Collission happened in the following patches:
migration: do cleanup operation after completion(738df5b9)
Bug fix.(1750c932f86)
kvmclock: add a new function to update env->tsc.(b52baab2)
The code provided by the patches was already in the upstreamed
version.
Change-Id: I3cc11841a6a76ae20887b2e245710199e1ea7f9a
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'qemu/hw/9pfs/virtio-9p-handle.c')
-rw-r--r-- | qemu/hw/9pfs/virtio-9p-handle.c | 708 |
1 files changed, 0 insertions, 708 deletions
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, -}; 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