[parted-devel] [PATCH v2 3/4] libparted/dasd: add new fdasd functions
Wang Dong
dongdwdw at linux.vnet.ibm.com
Wed Oct 26 02:22:48 UTC 2016
Introduce a set of new functions from the fdasd utility of the s390-tools
to keep the code base in parted and s390-tools in sync.
These new functions are:
fdasd_check_volser(): validate the volser input
fdasd_get_volser(): get volume serial (volser)
fdasd_change_volser(): change volser with string
fdasd_reuse_vtoc(): re-create vtoc labels based on the existing vtoc
Signed-off-by: Wang Dong <dongdwdw at linux.vnet.ibm.com>
Signed-off-by: Hendrik Brueckner <brueckner at linux.vnet.ibm.com>
---
include/parted/fdasd.in.h | 4 ++
libparted/labels/fdasd.c | 123 ++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 127 insertions(+)
diff --git a/include/parted/fdasd.in.h b/include/parted/fdasd.in.h
index 09a35a0..9e5d7d1 100644
--- a/include/parted/fdasd.in.h
+++ b/include/parted/fdasd.in.h
@@ -293,5 +293,9 @@ void fdasd_recreate_vtoc(fdasd_anchor_t *anc);
partition_info_t * fdasd_add_partition (fdasd_anchor_t *anc,
unsigned int start, unsigned int stop);
int fdasd_prepare_labels (fdasd_anchor_t *anc, int fd) ;
+void fdasd_check_volser(char *volser, int devno);
+int fdasd_get_volser(fdasd_anchor_t *anc, char *volser, int fd);
+void fdasd_change_volser(fdasd_anchor_t *anc, char *str);
+void fdasd_reuse_vtoc(fdasd_anchor_t *anc);
#endif /* FDASD_H */
diff --git a/libparted/labels/fdasd.c b/libparted/labels/fdasd.c
index e5df5cf..713ed6b 100644
--- a/libparted/labels/fdasd.c
+++ b/libparted/labels/fdasd.c
@@ -1320,4 +1320,127 @@ fdasd_add_partition (fdasd_anchor_t *anc, unsigned int start,
return p;
}
+/*
+ * Check for valid volume serial characters (max. 6) - remove invalid.
+ * If volser is empty, fill with default volser.
+ */
+void fdasd_check_volser (char *volser, int devno)
+{
+ int from, to;
+
+ for (from = 0, to = 0; volser[from] && from < VOLSER_LENGTH; from++) {
+
+ if ((volser[from] >= 0x23 &&
+ volser[from] <= 0x25) ||
+ (volser[from] >= 0x30 &&
+ volser[from] <= 0x39) ||
+ (volser[from] >= 0x40 &&
+ volser[from] <= 0x5a) ||
+ (volser[from] >= 0x61 &&
+ volser[from] <= 0x7a))
+ volser[to++] = toupper(volser[from]);
+ }
+
+ volser[to] = 0x00;
+
+ if (volser[0] == 0x00)
+ sprintf(volser, "0X%04x", devno);
+}
+
+/*
+ * get volser from vtoc
+ */
+int fdasd_get_volser (fdasd_anchor_t *anc, char *volser, int fd)
+{
+ volume_label_t vlabel;
+
+ vtoc_read_volume_label(fd, anc->label_pos, &vlabel);
+ vtoc_volume_label_get_volser(&vlabel, volser);
+ return 0;
+}
+
+/* Changes the volume serial (menu option)
+ *
+ */
+void fdasd_change_volser (fdasd_anchor_t *anc, char *str)
+{
+ fdasd_check_volser(str, anc->devno);
+ vtoc_volume_label_set_volser(anc->vlabel, str);
+
+ vtoc_set_cchhb(&anc->vlabel->vtoc, VTOC_START_CC, VTOC_START_HH, 0x01);
+ anc->vlabel_changed++;
+ anc->vtoc_changed++;
+}
+
+/*
+ * re-create all VTOC labels, but use the partition information
+ * from existing VTOC
+ */
+void fdasd_reuse_vtoc (fdasd_anchor_t *anc)
+{
+ partition_info_t *part_info = anc->first;
+ struct fdasd_hd_geometry geo = anc->geo;
+ format1_label_t f1;
+ format4_label_t f4;
+ format5_label_t f5;
+ format7_label_t f7;
+
+ vtoc_init_format4_label(&f4, geo.cylinders, anc->formatted_cylinders,
+ geo.heads, geo.sectors,
+ anc->blksize, anc->dev_type);
+
+ /* reuse some FMT4 values */
+ f4.DS4HPCHR = anc->f4->DS4HPCHR;
+ f4.DS4DSREC = anc->f4->DS4DSREC;
+
+ /* re-initialize both free-space labels */
+ vtoc_init_format5_label(&f5);
+ vtoc_init_format7_label(&f7);
+
+ if (anc->fspace_trk > 0)
+ vtoc_set_freespace(&f4, &f5, &f7, '+', anc->verbose,
+ FIRST_USABLE_TRK,
+ FIRST_USABLE_TRK + anc->fspace_trk - 1,
+ anc->formatted_cylinders, geo.heads);
+
+ while (part_info != NULL) {
+ if (part_info->used != 0x01) {
+ part_info = part_info->next;
+ continue;
+ }
+
+ if (anc->formatted_cylinders > LV_COMPAT_CYL)
+ vtoc_init_format8_label(anc->blksize,
+ &part_info->f1->DS1EXT1, &f1);
+ else
+ vtoc_init_format1_label(anc->blksize,
+ &part_info->f1->DS1EXT1, &f1);
+
+
+ strncpy(f1.DS1DSNAM, part_info->f1->DS1DSNAM, 44);
+ strncpy((char *)f1.DS1DSSN, (char *)part_info->f1->DS1DSSN, 6);
+ f1.DS1CREDT = part_info->f1->DS1CREDT;
+
+ memcpy(part_info->f1, &f1, sizeof(format1_label_t));
+
+ if (part_info->fspace_trk > 0)
+ vtoc_set_freespace(&f4, &f5, &f7, '+', anc->verbose,
+ part_info->end_trk + 1,
+ part_info->end_trk +
+ part_info->fspace_trk,
+ anc->formatted_cylinders, geo.heads);
+
+ part_info = part_info->next;
+ }
+
+ /* over-write old labels with new ones */
+ memcpy(anc->f4, &f4, sizeof(format4_label_t));
+ memcpy(anc->f5, &f5, sizeof(format5_label_t));
+ memcpy(anc->f7, &f7, sizeof(format7_label_t));
+
+ anc->vtoc_changed++;
+
+ return;
+}
+
/* vim:set tabstop=4 shiftwidth=4 softtabstop=4: */
--
2.8.4
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