qemu-ga: rename guest-agent-commands.c -> commands-posix.c

1 files changed, 0 insertions, 528 deletions

diff --git a/qga/guest-agent-commands.c b/qga/guest-agent-commands.c
deleted file mode 100644
index 126127a..0000000
--- a/qga/guest-agent-commands.c
+++ /dev/null
@@ -1,528 +0,0 @@
-/*
- * QEMU Guest Agent POSIX-specific command implementations
- *
- * Copyright IBM Corp. 2011
- *
- * Authors:
- *  Michael Roth      <mdroth@linux.vnet.ibm.com>
- *
- * This work is licensed under the terms of the GNU GPL, version 2 or later.
- * See the COPYING file in the top-level directory.
- */
-
-#include <glib.h>
-
-#if defined(__linux__)
-#include <mntent.h>
-#include <linux/fs.h>
-
-#if defined(__linux__) && defined(FIFREEZE)
-#define CONFIG_FSFREEZE
-#endif
-#endif
-
-#include <sys/types.h>
-#include <sys/ioctl.h>
-#include "qga/guest-agent-core.h"
-#include "qga-qmp-commands.h"
-#include "qerror.h"
-#include "qemu-queue.h"
-
-static GAState *ga_state;
-
-void qmp_guest_shutdown(bool has_mode, const char *mode, Error **err)
-{
-    int ret;
-    const char *shutdown_flag;
-
-    slog("guest-shutdown called, mode: %s", mode);
-    if (!has_mode || strcmp(mode, "powerdown") == 0) {
-        shutdown_flag = "-P";
-    } else if (strcmp(mode, "halt") == 0) {
-        shutdown_flag = "-H";
-    } else if (strcmp(mode, "reboot") == 0) {
-        shutdown_flag = "-r";
-    } else {
-        error_set(err, QERR_INVALID_PARAMETER_VALUE, "mode",
-                  "halt|powerdown|reboot");
-        return;
-    }
-
-    ret = fork();
-    if (ret == 0) {
-        /* child, start the shutdown */
-        setsid();
-        fclose(stdin);
-        fclose(stdout);
-        fclose(stderr);
-
-        ret = execl("/sbin/shutdown", "shutdown", shutdown_flag, "+0",
-                    "hypervisor initiated shutdown", (char*)NULL);
-        if (ret) {
-            slog("guest-shutdown failed: %s", strerror(errno));
-        }
-        exit(!!ret);
-    } else if (ret < 0) {
-        error_set(err, QERR_UNDEFINED_ERROR);
-    }
-}
-
-typedef struct GuestFileHandle {
-    uint64_t id;
-    FILE *fh;
-    QTAILQ_ENTRY(GuestFileHandle) next;
-} GuestFileHandle;
-
-static struct {
-    QTAILQ_HEAD(, GuestFileHandle) filehandles;
-} guest_file_state;
-
-static void guest_file_handle_add(FILE *fh)
-{
-    GuestFileHandle *gfh;
-
-    gfh = g_malloc0(sizeof(GuestFileHandle));
-    gfh->id = fileno(fh);
-    gfh->fh = fh;
-    QTAILQ_INSERT_TAIL(&guest_file_state.filehandles, gfh, next);
-}
-
-static GuestFileHandle *guest_file_handle_find(int64_t id)
-{
-    GuestFileHandle *gfh;
-
-    QTAILQ_FOREACH(gfh, &guest_file_state.filehandles, next)
-    {
-        if (gfh->id == id) {
-            return gfh;
-        }
-    }
-
-    return NULL;
-}
-
-int64_t qmp_guest_file_open(const char *path, bool has_mode, const char *mode, Error **err)
-{
-    FILE *fh;
-    int fd;
-    int64_t ret = -1;
-
-    if (!has_mode) {
-        mode = "r";
-    }
-    slog("guest-file-open called, filepath: %s, mode: %s", path, mode);
-    fh = fopen(path, mode);
-    if (!fh) {
-        error_set(err, QERR_OPEN_FILE_FAILED, path);
-        return -1;
-    }
-
-    /* set fd non-blocking to avoid common use cases (like reading from a
-     * named pipe) from hanging the agent
-     */
-    fd = fileno(fh);
-    ret = fcntl(fd, F_GETFL);
-    ret = fcntl(fd, F_SETFL, ret | O_NONBLOCK);
-    if (ret == -1) {
-        error_set(err, QERR_QGA_COMMAND_FAILED, "fcntl() failed");
-        fclose(fh);
-        return -1;
-    }
-
-    guest_file_handle_add(fh);
-    slog("guest-file-open, handle: %d", fd);
-    return fd;
-}
-
-void qmp_guest_file_close(int64_t handle, Error **err)
-{
-    GuestFileHandle *gfh = guest_file_handle_find(handle);
-    int ret;
-
-    slog("guest-file-close called, handle: %ld", handle);
-    if (!gfh) {
-        error_set(err, QERR_FD_NOT_FOUND, "handle");
-        return;
-    }
-
-    ret = fclose(gfh->fh);
-    if (ret == -1) {
-        error_set(err, QERR_QGA_COMMAND_FAILED, "fclose() failed");
-        return;
-    }
-
-    QTAILQ_REMOVE(&guest_file_state.filehandles, gfh, next);
-    g_free(gfh);
-}
-
-struct GuestFileRead *qmp_guest_file_read(int64_t handle, bool has_count,
-                                          int64_t count, Error **err)
-{
-    GuestFileHandle *gfh = guest_file_handle_find(handle);
-    GuestFileRead *read_data = NULL;
-    guchar *buf;
-    FILE *fh;
-    size_t read_count;
-
-    if (!gfh) {
-        error_set(err, QERR_FD_NOT_FOUND, "handle");
-        return NULL;
-    }
-
-    if (!has_count) {
-        count = QGA_READ_COUNT_DEFAULT;
-    } else if (count < 0) {
-        error_set(err, QERR_INVALID_PARAMETER, "count");
-        return NULL;
-    }
-
-    fh = gfh->fh;
-    buf = g_malloc0(count+1);
-    read_count = fread(buf, 1, count, fh);
-    if (ferror(fh)) {
-        slog("guest-file-read failed, handle: %ld", handle);
-        error_set(err, QERR_QGA_COMMAND_FAILED, "fread() failed");
-    } else {
-        buf[read_count] = 0;
-        read_data = g_malloc0(sizeof(GuestFileRead));
-        read_data->count = read_count;
-        read_data->eof = feof(fh);
-        if (read_count) {
-            read_data->buf_b64 = g_base64_encode(buf, read_count);
-        }
-    }
-    g_free(buf);
-    clearerr(fh);
-
-    return read_data;
-}
-
-GuestFileWrite *qmp_guest_file_write(int64_t handle, const char *buf_b64,
-                                     bool has_count, int64_t count, Error **err)
-{
-    GuestFileWrite *write_data = NULL;
-    guchar *buf;
-    gsize buf_len;
-    int write_count;
-    GuestFileHandle *gfh = guest_file_handle_find(handle);
-    FILE *fh;
-
-    if (!gfh) {
-        error_set(err, QERR_FD_NOT_FOUND, "handle");
-        return NULL;
-    }
-
-    fh = gfh->fh;
-    buf = g_base64_decode(buf_b64, &buf_len);
-
-    if (!has_count) {
-        count = buf_len;
-    } else if (count < 0 || count > buf_len) {
-        g_free(buf);
-        error_set(err, QERR_INVALID_PARAMETER, "count");
-        return NULL;
-    }
-
-    write_count = fwrite(buf, 1, count, fh);
-    if (ferror(fh)) {
-        slog("guest-file-write failed, handle: %ld", handle);
-        error_set(err, QERR_QGA_COMMAND_FAILED, "fwrite() error");
-    } else {
-        write_data = g_malloc0(sizeof(GuestFileWrite));
-        write_data->count = write_count;
-        write_data->eof = feof(fh);
-    }
-    g_free(buf);
-    clearerr(fh);
-
-    return write_data;
-}
-
-struct GuestFileSeek *qmp_guest_file_seek(int64_t handle, int64_t offset,
-                                          int64_t whence, Error **err)
-{
-    GuestFileHandle *gfh = guest_file_handle_find(handle);
-    GuestFileSeek *seek_data = NULL;
-    FILE *fh;
-    int ret;
-
-    if (!gfh) {
-        error_set(err, QERR_FD_NOT_FOUND, "handle");
-        return NULL;
-    }
-
-    fh = gfh->fh;
-    ret = fseek(fh, offset, whence);
-    if (ret == -1) {
-        error_set(err, QERR_QGA_COMMAND_FAILED, strerror(errno));
-    } else {
-        seek_data = g_malloc0(sizeof(GuestFileRead));
-        seek_data->position = ftell(fh);
-        seek_data->eof = feof(fh);
-    }
-    clearerr(fh);
-
-    return seek_data;
-}
-
-void qmp_guest_file_flush(int64_t handle, Error **err)
-{
-    GuestFileHandle *gfh = guest_file_handle_find(handle);
-    FILE *fh;
-    int ret;
-
-    if (!gfh) {
-        error_set(err, QERR_FD_NOT_FOUND, "handle");
-        return;
-    }
-
-    fh = gfh->fh;
-    ret = fflush(fh);
-    if (ret == EOF) {
-        error_set(err, QERR_QGA_COMMAND_FAILED, strerror(errno));
-    }
-}
-
-static void guest_file_init(void)
-{
-    QTAILQ_INIT(&guest_file_state.filehandles);
-}
-
-#if defined(CONFIG_FSFREEZE)
-static void disable_logging(void)
-{
-    ga_disable_logging(ga_state);
-}
-
-static void enable_logging(void)
-{
-    ga_enable_logging(ga_state);
-}
-
-typedef struct GuestFsfreezeMount {
-    char *dirname;
-    char *devtype;
-    QTAILQ_ENTRY(GuestFsfreezeMount) next;
-} GuestFsfreezeMount;
-
-struct {
-    GuestFsfreezeStatus status;
-    QTAILQ_HEAD(, GuestFsfreezeMount) mount_list;
-} guest_fsfreeze_state;
-
-/*
- * Walk the mount table and build a list of local file systems
- */
-static int guest_fsfreeze_build_mount_list(void)
-{
-    struct mntent *ment;
-    GuestFsfreezeMount *mount, *temp;
-    char const *mtab = MOUNTED;
-    FILE *fp;
-
-    QTAILQ_FOREACH_SAFE(mount, &guest_fsfreeze_state.mount_list, next, temp) {
-        QTAILQ_REMOVE(&guest_fsfreeze_state.mount_list, mount, next);
-        g_free(mount->dirname);
-        g_free(mount->devtype);
-        g_free(mount);
-    }
-
-    fp = setmntent(mtab, "r");
-    if (!fp) {
-        g_warning("fsfreeze: unable to read mtab");
-        return -1;
-    }
-
-    while ((ment = getmntent(fp))) {
-        /*
-         * An entry which device name doesn't start with a '/' is
-         * either a dummy file system or a network file system.
-         * Add special handling for smbfs and cifs as is done by
-         * coreutils as well.
-         */
-        if ((ment->mnt_fsname[0] != '/') ||
-            (strcmp(ment->mnt_type, "smbfs") == 0) ||
-            (strcmp(ment->mnt_type, "cifs") == 0)) {
-            continue;
-        }
-
-        mount = g_malloc0(sizeof(GuestFsfreezeMount));
-        mount->dirname = g_strdup(ment->mnt_dir);
-        mount->devtype = g_strdup(ment->mnt_type);
-
-        QTAILQ_INSERT_TAIL(&guest_fsfreeze_state.mount_list, mount, next);
-    }
-
-    endmntent(fp);
-
-    return 0;
-}
-
-/*
- * Return status of freeze/thaw
- */
-GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **err)
-{
-    return guest_fsfreeze_state.status;
-}
-
-/*
- * Walk list of mounted file systems in the guest, and freeze the ones which
- * are real local file systems.
- */
-int64_t qmp_guest_fsfreeze_freeze(Error **err)
-{
-    int ret = 0, i = 0;
-    struct GuestFsfreezeMount *mount, *temp;
-    int fd;
-    char err_msg[512];
-
-    slog("guest-fsfreeze called");
-
-    if (guest_fsfreeze_state.status == GUEST_FSFREEZE_STATUS_FROZEN) {
-        return 0;
-    }
-
-    ret = guest_fsfreeze_build_mount_list();
-    if (ret < 0) {
-        return ret;
-    }
-
-    /* cannot risk guest agent blocking itself on a write in this state */
-    disable_logging();
-
-    QTAILQ_FOREACH_SAFE(mount, &guest_fsfreeze_state.mount_list, next, temp) {
-        fd = qemu_open(mount->dirname, O_RDONLY);
-        if (fd == -1) {
-            sprintf(err_msg, "failed to open %s, %s", mount->dirname, strerror(errno));
-            error_set(err, QERR_QGA_COMMAND_FAILED, err_msg);
-            goto error;
-        }
-
-        /* we try to cull filesytems we know won't work in advance, but other
-         * filesytems may not implement fsfreeze for less obvious reasons.
-         * these will report EOPNOTSUPP, so we simply ignore them. when
-         * thawing, these filesystems will return an EINVAL instead, due to
-         * not being in a frozen state. Other filesystem-specific
-         * errors may result in EINVAL, however, so the user should check the
-         * number * of filesystems returned here against those returned by the
-         * thaw operation to determine whether everything completed
-         * successfully
-         */
-        ret = ioctl(fd, FIFREEZE);
-        if (ret < 0 && errno != EOPNOTSUPP) {
-            sprintf(err_msg, "failed to freeze %s, %s", mount->dirname, strerror(errno));
-            error_set(err, QERR_QGA_COMMAND_FAILED, err_msg);
-            close(fd);
-            goto error;
-        }
-        close(fd);
-
-        i++;
-    }
-
-    guest_fsfreeze_state.status = GUEST_FSFREEZE_STATUS_FROZEN;
-    return i;
-
-error:
-    if (i > 0) {
-        qmp_guest_fsfreeze_thaw(NULL);
-    }
-    return 0;
-}
-
-/*
- * Walk list of frozen file systems in the guest, and thaw them.
- */
-int64_t qmp_guest_fsfreeze_thaw(Error **err)
-{
-    int ret;
-    GuestFsfreezeMount *mount, *temp;
-    int fd, i = 0;
-    bool has_error = false;
-
-    QTAILQ_FOREACH_SAFE(mount, &guest_fsfreeze_state.mount_list, next, temp) {
-        fd = qemu_open(mount->dirname, O_RDONLY);
-        if (fd == -1) {
-            has_error = true;
-            continue;
-        }
-        ret = ioctl(fd, FITHAW);
-        if (ret < 0 && errno != EOPNOTSUPP && errno != EINVAL) {
-            has_error = true;
-            close(fd);
-            continue;
-        }
-        close(fd);
-        i++;
-    }
-
-    if (has_error) {
-        guest_fsfreeze_state.status = GUEST_FSFREEZE_STATUS_ERROR;
-    } else {
-        guest_fsfreeze_state.status = GUEST_FSFREEZE_STATUS_THAWED;
-    }
-    enable_logging();
-    return i;
-}
-
-static void guest_fsfreeze_init(void)
-{
-    guest_fsfreeze_state.status = GUEST_FSFREEZE_STATUS_THAWED;
-    QTAILQ_INIT(&guest_fsfreeze_state.mount_list);
-}
-
-static void guest_fsfreeze_cleanup(void)
-{
-    int64_t ret;
-    Error *err = NULL;
-
-    if (guest_fsfreeze_state.status == GUEST_FSFREEZE_STATUS_FROZEN) {
-        ret = qmp_guest_fsfreeze_thaw(&err);
-        if (ret < 0 || err) {
-            slog("failed to clean up frozen filesystems");
-        }
-    }
-}
-#else
-/*
- * Return status of freeze/thaw
- */
-GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **err)
-{
-    error_set(err, QERR_UNSUPPORTED);
-
-    return 0;
-}
-
-/*
- * Walk list of mounted file systems in the guest, and freeze the ones which
- * are real local file systems.
- */
-int64_t qmp_guest_fsfreeze_freeze(Error **err)
-{
-    error_set(err, QERR_UNSUPPORTED);
-
-    return 0;
-}
-
-/*
- * Walk list of frozen file systems in the guest, and thaw them.
- */
-int64_t qmp_guest_fsfreeze_thaw(Error **err)
-{
-    error_set(err, QERR_UNSUPPORTED);
-
-    return 0;
-}
-#endif
-
-/* register init/cleanup routines for stateful command groups */
-void ga_command_state_init(GAState *s, GACommandState *cs)
-{
-    ga_state = s;
-#if defined(CONFIG_FSFREEZE)
-    ga_command_state_add(cs, guest_fsfreeze_init, guest_fsfreeze_cleanup);
-#endif
-    ga_command_state_add(cs, guest_file_init, NULL);
-}