[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[RFC v4 4/9] file-posix: introduce get_sysfs_str_val for device zoned mo
From: |
Sam Li |
Subject: |
[RFC v4 4/9] file-posix: introduce get_sysfs_str_val for device zoned model. |
Date: |
Tue, 12 Jul 2022 10:13:40 +0800 |
Signed-off-by: Sam Li <faithilikerun@gmail.com>
---
block/file-posix.c | 60 ++++++++++++++++++++++++++++++++++++
include/block/block-common.h | 4 +--
2 files changed, 62 insertions(+), 2 deletions(-)
diff --git a/block/file-posix.c b/block/file-posix.c
index 3161d39ea4..42708012ff 100644
--- a/block/file-posix.c
+++ b/block/file-posix.c
@@ -1279,6 +1279,65 @@ out:
#endif
}
+/*
+ * Convert the zoned attribute file in sysfs to internal value.
+ */
+static zone_model get_sysfs_str_val(int fd, struct stat *st) {
+#ifdef CONFIG_LINUX
+ char buf[32];
+ char *sysfspath = NULL;
+ int ret, offset;
+ int sysfd = -1;
+
+ if (S_ISCHR(st->st_mode)) {
+ if (ioctl(fd, SG_GET_SG_TABLESIZE, &ret) == 0) {
+ return ret;
+ }
+ return -ENOTSUP;
+ }
+
+ if (!S_ISBLK(st->st_mode)) {
+ return -ENOTSUP;
+ }
+
+ sysfspath = g_strdup_printf("/sys/dev/block/%u:%u/queue/zoned",
+ major(st->st_rdev), minor(st->st_rdev));
+ sysfd = open(sysfspath, O_RDONLY);
+ if (sysfd == -1) {
+ ret = -errno;
+ goto out;
+ }
+ offset = 0;
+ do {
+ ret = read(sysfd, buf + offset, sizeof(buf) - 1 + offset);
+ if (ret > 0) {
+ offset += ret;
+ }
+ } while (ret == -1);
+ /* The file is ended with '\n' */
+ if (buf[ret - 1] == '\n') {
+ buf[ret - 1] = '\0';
+ }
+
+ if (strcmp(buf, "host-managed") == 0) {
+ return BLK_Z_HM;
+ } else if (strcmp(buf, "host-aware") == 0) {
+ return BLK_Z_HA;
+ } else {
+ return -ENOTSUP;
+ }
+
+out:
+ if (sysfd != -1) {
+ close(sysfd);
+ }
+ g_free(sysfspath);
+ return ret;
+#else
+ return -ENOTSUP;
+#endif
+}
+
static int hdev_get_max_segments(int fd, struct stat *st) {
return get_sysfs_long_val(fd, st, "max_segments");
}
@@ -1885,6 +1944,7 @@ static int handle_aiocb_zone_mgmt(void *opaque) {
int64_t len = aiocb->aio_nbytes;
zone_op op = aiocb->zone_mgmt.op;
+ zone_model mod;
struct blk_zone_range range;
const char *ioctl_name;
unsigned long ioctl_op;
diff --git a/include/block/block-common.h b/include/block/block-common.h
index 78cddeeda5..35e00afe8e 100644
--- a/include/block/block-common.h
+++ b/include/block/block-common.h
@@ -56,8 +56,8 @@ typedef enum zone_op {
} zone_op;
typedef enum zone_model {
- BLK_Z_HM,
- BLK_Z_HA,
+ BLK_Z_HM = 0x1,
+ BLK_Z_HA = 0x2,
} zone_model;
typedef enum BlkZoneCondition {
--
2.36.1
- Re: [RFC v4 1/9] block: add block layer APIs resembling Linux ZonedBlockDevice ioctls., (continued)
[RFC v4 3/9] file-posix: introduce get_sysfs_long_val for a block queue of sysfs attribute, Sam Li, 2022/07/11
[RFC v4 2/9] qemu-io: add zoned block device operations., Sam Li, 2022/07/11
[RFC v4 4/9] file-posix: introduce get_sysfs_str_val for device zoned model.,
Sam Li <=
[RFC v4 5/9] qemu-iotests: test new zone operations., Sam Li, 2022/07/11
[RFC v4 6/9] raw-format: add zone operations, Sam Li, 2022/07/11
[RFC v4 7/9] config: add check to block layer, Sam Li, 2022/07/11