diff options
Diffstat (limited to 'qga/commands-posix.c')
| -rw-r--r-- | qga/commands-posix.c | 114 |
1 files changed, 93 insertions, 21 deletions
diff --git a/qga/commands-posix.c b/qga/commands-posix.c index 00d035d..ce90421 100644 --- a/qga/commands-posix.c +++ b/qga/commands-posix.c @@ -38,9 +38,12 @@ extern char **environ; #include <sys/socket.h> #include <net/if.h> -#if defined(__linux__) && defined(FIFREEZE) +#ifdef FIFREEZE #define CONFIG_FSFREEZE #endif +#ifdef FITRIM +#define CONFIG_FSTRIM +#endif #endif void qmp_guest_shutdown(bool has_mode, const char *mode, Error **err) @@ -312,19 +315,18 @@ static void guest_file_init(void) /* linux-specific implementations. avoid this if at all possible. */ #if defined(__linux__) -#if defined(CONFIG_FSFREEZE) - -typedef struct GuestFsfreezeMount { +#if defined(CONFIG_FSFREEZE) || defined(CONFIG_FSTRIM) +typedef struct FsMount { char *dirname; char *devtype; - QTAILQ_ENTRY(GuestFsfreezeMount) next; -} GuestFsfreezeMount; + QTAILQ_ENTRY(FsMount) next; +} FsMount; -typedef QTAILQ_HEAD(, GuestFsfreezeMount) GuestFsfreezeMountList; +typedef QTAILQ_HEAD(, FsMount) FsMountList; -static void guest_fsfreeze_free_mount_list(GuestFsfreezeMountList *mounts) +static void free_fs_mount_list(FsMountList *mounts) { - GuestFsfreezeMount *mount, *temp; + FsMount *mount, *temp; if (!mounts) { return; @@ -341,10 +343,10 @@ static void guest_fsfreeze_free_mount_list(GuestFsfreezeMountList *mounts) /* * Walk the mount table and build a list of local file systems */ -static int guest_fsfreeze_build_mount_list(GuestFsfreezeMountList *mounts) +static int build_fs_mount_list(FsMountList *mounts) { struct mntent *ment; - GuestFsfreezeMount *mount; + FsMount *mount; char const *mtab = "/proc/self/mounts"; FILE *fp; @@ -367,7 +369,7 @@ static int guest_fsfreeze_build_mount_list(GuestFsfreezeMountList *mounts) continue; } - mount = g_malloc0(sizeof(GuestFsfreezeMount)); + mount = g_malloc0(sizeof(FsMount)); mount->dirname = g_strdup(ment->mnt_dir); mount->devtype = g_strdup(ment->mnt_type); @@ -378,6 +380,9 @@ static int guest_fsfreeze_build_mount_list(GuestFsfreezeMountList *mounts) return 0; } +#endif + +#if defined(CONFIG_FSFREEZE) /* * Return status of freeze/thaw @@ -398,15 +403,15 @@ GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **err) int64_t qmp_guest_fsfreeze_freeze(Error **err) { int ret = 0, i = 0; - GuestFsfreezeMountList mounts; - struct GuestFsfreezeMount *mount; + FsMountList mounts; + struct FsMount *mount; int fd; char err_msg[512]; slog("guest-fsfreeze called"); QTAILQ_INIT(&mounts); - ret = guest_fsfreeze_build_mount_list(&mounts); + ret = build_fs_mount_list(&mounts); if (ret < 0) { return ret; } @@ -447,11 +452,11 @@ int64_t qmp_guest_fsfreeze_freeze(Error **err) close(fd); } - guest_fsfreeze_free_mount_list(&mounts); + free_fs_mount_list(&mounts); return i; error: - guest_fsfreeze_free_mount_list(&mounts); + free_fs_mount_list(&mounts); qmp_guest_fsfreeze_thaw(NULL); return 0; } @@ -462,12 +467,12 @@ error: int64_t qmp_guest_fsfreeze_thaw(Error **err) { int ret; - GuestFsfreezeMountList mounts; - GuestFsfreezeMount *mount; + FsMountList mounts; + FsMount *mount; int fd, i = 0, logged; QTAILQ_INIT(&mounts); - ret = guest_fsfreeze_build_mount_list(&mounts); + ret = build_fs_mount_list(&mounts); if (ret) { error_set(err, QERR_QGA_COMMAND_FAILED, "failed to enumerate filesystems"); @@ -507,7 +512,7 @@ int64_t qmp_guest_fsfreeze_thaw(Error **err) } ga_unset_frozen(ga_state); - guest_fsfreeze_free_mount_list(&mounts); + free_fs_mount_list(&mounts); return i; } @@ -525,6 +530,65 @@ static void guest_fsfreeze_cleanup(void) } #endif /* CONFIG_FSFREEZE */ +#if defined(CONFIG_FSTRIM) +/* + * Walk list of mounted file systems in the guest, and trim them. + */ +void qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **err) +{ + int ret = 0; + FsMountList mounts; + struct FsMount *mount; + int fd; + char err_msg[512]; + struct fstrim_range r = { + .start = 0, + .len = -1, + .minlen = has_minimum ? minimum : 0, + }; + + slog("guest-fstrim called"); + + QTAILQ_INIT(&mounts); + ret = build_fs_mount_list(&mounts); + if (ret < 0) { + return; + } + + QTAILQ_FOREACH(mount, &mounts, next) { + 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 fstrim for less obvious reasons. These + * will report EOPNOTSUPP; we simply ignore these errors. Any other + * error means an unexpected error, so return it in those cases. In + * some other cases ENOTTY will be reported (e.g. CD-ROMs). + */ + ret = ioctl(fd, FITRIM, &r); + if (ret == -1) { + if (errno != ENOTTY && errno != EOPNOTSUPP) { + sprintf(err_msg, "failed to trim %s, %s", + mount->dirname, strerror(errno)); + error_set(err, QERR_QGA_COMMAND_FAILED, err_msg); + close(fd); + goto error; + } + } + close(fd); + } + +error: + free_fs_mount_list(&mounts); +} +#endif /* CONFIG_FSTRIM */ + + #define LINUX_SYS_STATE_FILE "/sys/power/state" #define SUSPEND_SUPPORTED 0 #define SUSPEND_NOT_SUPPORTED 1 @@ -918,7 +982,15 @@ int64_t qmp_guest_fsfreeze_thaw(Error **err) return 0; } +#endif /* CONFIG_FSFREEZE */ +#if !defined(CONFIG_FSTRIM) +void qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **err) +{ + error_set(err, QERR_UNSUPPORTED); + + return; +} #endif /* register init/cleanup routines for stateful command groups */ |