diff options
Diffstat (limited to 'include/uapi/linux/blkzoned.h')
| -rw-r--r-- | include/uapi/linux/blkzoned.h | 56 |
1 files changed, 46 insertions, 10 deletions
diff --git a/include/uapi/linux/blkzoned.h b/include/uapi/linux/blkzoned.h index b80fcc9ea525..e33f02703350 100644 --- a/include/uapi/linux/blkzoned.h +++ b/include/uapi/linux/blkzoned.h @@ -48,19 +48,28 @@ enum blk_zone_type { * FINISH ZONE command. * @BLK_ZONE_COND_READONLY: The zone is read-only. * @BLK_ZONE_COND_OFFLINE: The zone is offline (sectors cannot be read/written). + * @BLK_ZONE_COND_ACTIVE: The zone is either implicitly open, explicitly open, + * or closed. * * The Zone Condition state machine in the ZBC/ZAC standards maps the above * deinitions as: - * - ZC1: Empty | BLK_ZONE_EMPTY + * - ZC1: Empty | BLK_ZONE_COND_EMPTY * - ZC2: Implicit Open | BLK_ZONE_COND_IMP_OPEN * - ZC3: Explicit Open | BLK_ZONE_COND_EXP_OPEN - * - ZC4: Closed | BLK_ZONE_CLOSED - * - ZC5: Full | BLK_ZONE_FULL - * - ZC6: Read Only | BLK_ZONE_READONLY - * - ZC7: Offline | BLK_ZONE_OFFLINE + * - ZC4: Closed | BLK_ZONE_COND_CLOSED + * - ZC5: Full | BLK_ZONE_COND_FULL + * - ZC6: Read Only | BLK_ZONE_COND_READONLY + * - ZC7: Offline | BLK_ZONE_COND_OFFLINE * * Conditions 0x5 to 0xC are reserved by the current ZBC/ZAC spec and should * be considered invalid. + * + * The condition BLK_ZONE_COND_ACTIVE is used only with cached zone reports. + * It is used to report any of the BLK_ZONE_COND_IMP_OPEN, + * BLK_ZONE_COND_EXP_OPEN and BLK_ZONE_COND_CLOSED conditions. Conversely, a + * regular zone report will never report a zone condition using + * BLK_ZONE_COND_ACTIVE and instead use the conditions BLK_ZONE_COND_IMP_OPEN, + * BLK_ZONE_COND_EXP_OPEN or BLK_ZONE_COND_CLOSED as reported by the device. */ enum blk_zone_cond { BLK_ZONE_COND_NOT_WP = 0x0, @@ -71,15 +80,27 @@ enum blk_zone_cond { BLK_ZONE_COND_READONLY = 0xD, BLK_ZONE_COND_FULL = 0xE, BLK_ZONE_COND_OFFLINE = 0xF, + + BLK_ZONE_COND_ACTIVE = 0xFF, }; /** * enum blk_zone_report_flags - Feature flags of reported zone descriptors. * - * @BLK_ZONE_REP_CAPACITY: Zone descriptor has capacity field. + * @BLK_ZONE_REP_CAPACITY: Output only. Indicates that zone descriptors in a + * zone report have a valid capacity field. + * @BLK_ZONE_REP_CACHED: Input only. Indicates that the zone report should be + * generated using cached zone information. In this case, + * the implicit open, explicit open and closed zone + * conditions are all reported with the + * BLK_ZONE_COND_ACTIVE condition. */ enum blk_zone_report_flags { - BLK_ZONE_REP_CAPACITY = (1 << 0), + /* Output flags */ + BLK_ZONE_REP_CAPACITY = (1U << 0), + + /* Input flags */ + BLK_ZONE_REP_CACHED = (1U << 31), }; /** @@ -122,6 +143,10 @@ struct blk_zone { * @sector: starting sector of report * @nr_zones: IN maximum / OUT actual * @flags: one or more flags as defined by enum blk_zone_report_flags. + * @flags: one or more flags as defined by enum blk_zone_report_flags. + * With BLKREPORTZONE, this field is ignored as an input and is valid + * only as an output. Using BLKREPORTZONEV2, this field is used as both + * input and output. * @zones: Space to hold @nr_zones @zones entries on reply. * * The array of at most @nr_zones must follow this structure in memory. @@ -148,9 +173,19 @@ struct blk_zone_range { /** * Zoned block device ioctl's: * - * @BLKREPORTZONE: Get zone information. Takes a zone report as argument. - * The zone report will start from the zone containing the - * sector specified in the report request structure. + * @BLKREPORTZONE: Get zone information from a zoned device. Takes a zone report + * as argument. The zone report will start from the zone + * containing the sector specified in struct blk_zone_report. + * The flags field of struct blk_zone_report is used as an + * output only and ignored as an input. + * DEPRECATED, use BLKREPORTZONEV2 instead. + * @BLKREPORTZONEV2: Same as @BLKREPORTZONE but uses the flags field of + * struct blk_zone_report as an input, allowing to get a zone + * report using cached zone information if the flag + * BLK_ZONE_REP_CACHED is set. In such case, the zone report + * may include zones with the condition @BLK_ZONE_COND_ACTIVE + * (c.f. the description of this condition above for more + * details). * @BLKRESETZONE: Reset the write pointer of the zones in the specified * sector range. The sector range must be zone aligned. * @BLKGETZONESZ: Get the device zone size in number of 512 B sectors. @@ -169,5 +204,6 @@ struct blk_zone_range { #define BLKOPENZONE _IOW(0x12, 134, struct blk_zone_range) #define BLKCLOSEZONE _IOW(0x12, 135, struct blk_zone_range) #define BLKFINISHZONE _IOW(0x12, 136, struct blk_zone_range) +#define BLKREPORTZONEV2 _IOWR(0x12, 142, struct blk_zone_report) #endif /* _UAPI_BLKZONED_H */ |