Use sysfs attribute files to get the long value of zoned device information.
Signed-off-by: Sam Li <faithilike...@gmail.com> Reviewed-by: Hannes Reinecke <h...@suse.de> --- block/file-posix.c | 37 +++++++++++++++++++++++-------------- 1 file changed, 23 insertions(+), 14 deletions(-) diff --git a/block/file-posix.c b/block/file-posix.c index 48cd096624..a40eab64a2 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -1210,29 +1210,27 @@ static int hdev_get_max_hw_transfer(int fd, struct stat *st) #endif } -static int hdev_get_max_segments(int fd, struct stat *st) -{ +/* + * Get zoned device information (chunk_sectors, zoned_append_max_bytes, + * max_open_zones, max_active_zones) through sysfs attribute files. + */ +static long get_sysfs_long_val(int fd, struct stat *st, + const char *attribute) { #ifdef CONFIG_LINUX char buf[32]; const char *end; char *sysfspath = NULL; int ret; int sysfd = -1; - long max_segments; - - if (S_ISCHR(st->st_mode)) { - if (ioctl(fd, SG_GET_SG_TABLESIZE, &ret) == 0) { - return ret; - } - return -ENOTSUP; - } + long val; if (!S_ISBLK(st->st_mode)) { return -ENOTSUP; } - sysfspath = g_strdup_printf("/sys/dev/block/%u:%u/queue/max_segments", - major(st->st_rdev), minor(st->st_rdev)); + sysfspath = g_strdup_printf("/sys/dev/block/%u:%u/queue/%s", + major(st->st_rdev), minor(st->st_rdev), + attribute); sysfd = open(sysfspath, O_RDONLY); if (sysfd == -1) { ret = -errno; @@ -1250,9 +1248,9 @@ static int hdev_get_max_segments(int fd, struct stat *st) } buf[ret] = 0; /* The file is ended with '\n', pass 'end' to accept that. */ - ret = qemu_strtol(buf, &end, 10, &max_segments); + ret = qemu_strtol(buf, &end, 10, &val); if (ret == 0 && end && *end == '\n') { - ret = max_segments; + ret = val; } out: @@ -1266,6 +1264,17 @@ out: #endif } +static int hdev_get_max_segments(int fd, struct stat *st) { + int ret; + if (S_ISCHR(st->st_mode)) { + if (ioctl(fd, SG_GET_SG_TABLESIZE, &ret) == 0) { + return ret; + } + return -ENOTSUP; + } + return get_sysfs_long_val(fd, st, "max_segments"); +} + static void raw_refresh_limits(BlockDriverState *bs, Error **errp) { BDRVRawState *s = bs->opaque; -- 2.37.1