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btrfs-progs: use get_sysfs_proto_supported() in device_get_zone_unusable()

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Use the sysfs helper to read u64 values of the zoned stats.

Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2023-12-01 01:58:56 +01:00
parent 9da7e92af9
commit e9a66cde91
1 changed files with 10 additions and 14 deletions
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24
common/device-utils.c
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@ -437,29 +437,25 @@ int device_get_queue_param(const char *file, const char *param, char *buf, size_
*/
u64 device_get_zone_unusable(int fd, u64 flags)
{
char buf[64];
int sys_fd;
u64 unusable = DEVICE_ZONE_UNUSABLE_UNKNOWN;
int ret;
u64 unusable;
/* Don't report it for a regular fs */
sys_fd = sysfs_open_fsid_file(fd, "features/zoned");
if (sys_fd < 0)
ret = sysfs_open_fsid_file(fd, "features/zoned");
if (ret < 0)
return DEVICE_ZONE_UNUSABLE_UNKNOWN;
close(sys_fd);
sys_fd = -1;
close(ret);
ret = -1;
if ((flags & BTRFS_BLOCK_GROUP_DATA) == BTRFS_BLOCK_GROUP_DATA)
sys_fd = sysfs_open_fsid_file(fd, "allocation/data/bytes_zone_unusable");
ret = sysfs_read_fsid_file_u64(fd, "allocation/data/bytes_zone_unusable", &unusable);
else if ((flags & BTRFS_BLOCK_GROUP_METADATA) == BTRFS_BLOCK_GROUP_METADATA)
sys_fd = sysfs_open_fsid_file(fd, "allocation/metadata/bytes_zone_unusable");
ret = sysfs_read_fsid_file_u64(fd, "allocation/metadata/bytes_zone_unusable", &unusable);
else if ((flags & BTRFS_BLOCK_GROUP_SYSTEM) == BTRFS_BLOCK_GROUP_SYSTEM)
sys_fd = sysfs_open_fsid_file(fd, "allocation/system/bytes_zone_unusable");
ret = sysfs_read_fsid_file_u64(fd, "allocation/system/bytes_zone_unusable", &unusable);
if (sys_fd < 0)
if (ret < 0)
return DEVICE_ZONE_UNUSABLE_UNKNOWN;
sysfs_read_file(sys_fd, buf, sizeof(buf));
unusable = strtoull(buf, NULL, 10);
close(sys_fd);
return unusable;
}