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authorJan Höppner <hoeppner@linux.vnet.ibm.com>2015-08-19 13:41:20 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2016-04-15 18:16:39 +0200
commit8fd575200db5b53f6ea6818dd017f1b43190db12 (patch)
tree670f65e645d0d669864979d13a5e91448b53f8ad /arch/s390/include/uapi/asm/dasd.h
parent3fa7ee8844c31cb9c78992bb82cfaeb13375345d (diff)
s390/dasd: Add new ioctl BIODASDCHECKFMT
Implement new DASD IOCTL BIODASDCHECKFMT to check a range of tracks on a DASD volume for correct formatting. The following characteristics are checked: - Block size - ECKD key length - ECKD record ID - Number of records per track Signed-off-by: Jan Höppner <hoeppner@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/uapi/asm/dasd.h')
-rw-r--r--arch/s390/include/uapi/asm/dasd.h32
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/s390/include/uapi/asm/dasd.h b/arch/s390/include/uapi/asm/dasd.h
index 5812a3b2df9e..1340311dab77 100644
--- a/arch/s390/include/uapi/asm/dasd.h
+++ b/arch/s390/include/uapi/asm/dasd.h
@@ -187,6 +187,36 @@ typedef struct format_data_t {
#define DASD_FMT_INT_INVAL 4 /* invalidate tracks */
#define DASD_FMT_INT_COMPAT 8 /* use OS/390 compatible disk layout */
+/*
+ * struct format_check_t
+ * represents all data necessary to evaluate the format of
+ * different tracks of a dasd
+ */
+typedef struct format_check_t {
+ /* Input */
+ struct format_data_t expect;
+
+ /* Output */
+ unsigned int result; /* Error indication (DASD_FMT_ERR_*) */
+ unsigned int unit; /* Track that is in error */
+ unsigned int rec; /* Record that is in error */
+ unsigned int num_records; /* Records in the track in error */
+ unsigned int blksize; /* Blocksize of first record in error */
+ unsigned int key_length; /* Key length of first record in error */
+} format_check_t;
+
+/* Values returned in format_check_t when a format error is detected: */
+/* Too few records were found on a single track */
+#define DASD_FMT_ERR_TOO_FEW_RECORDS 1
+/* Too many records were found on a single track */
+#define DASD_FMT_ERR_TOO_MANY_RECORDS 2
+/* Blocksize/data-length of a record was wrong */
+#define DASD_FMT_ERR_BLKSIZE 3
+/* A record ID is defined by cylinder, head, and record number (CHR). */
+/* On mismatch, this error is set */
+#define DASD_FMT_ERR_RECORD_ID 4
+/* If key-length was != 0 */
+#define DASD_FMT_ERR_KEY_LENGTH 5
/*
* struct attrib_data_t
@@ -288,6 +318,8 @@ struct dasd_snid_ioctl_data {
/* Get Sense Path Group ID (SNID) data */
#define BIODASDSNID _IOWR(DASD_IOCTL_LETTER, 1, struct dasd_snid_ioctl_data)
+/* Check device format according to format_check_t */
+#define BIODASDCHECKFMT _IOWR(DASD_IOCTL_LETTER, 2, format_check_t)
#define BIODASDSYMMIO _IOWR(DASD_IOCTL_LETTER, 240, dasd_symmio_parms_t)

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