Nikos Skalkotos
2014-Dec-03 14:11 UTC
[Libguestfs] [PATCH 2/4] Support fstab block device resolution for NetBSD
Make a best effort try to map NetBSD disklabel partitions to Linux partitions. The mapping will be incorrect if there is a gap in the disklabel partitions sequence, e.g. 'b' (swap) partition is missing but 'e' partition is defined. Signed-off-by: Nikos Skalkotos <skalkoto@grnet.gr> --- src/inspect-fs-unix.c | 31 ++++++++++++++++++++++++++----- 1 file changed, 26 insertions(+), 5 deletions(-) diff --git a/src/inspect-fs-unix.c b/src/inspect-fs-unix.c index ab76bc6..18be68b 100644 --- a/src/inspect-fs-unix.c +++ b/src/inspect-fs-unix.c @@ -83,6 +83,7 @@ COMPILE_REGEXP (re_hurd_dev, "^/dev/(h)d(\\d+)s(\\d+)$", 0) COMPILE_REGEXP (re_openbsd, "^OpenBSD (\\d+|\\?)\\.(\\d+|\\?)", 0) COMPILE_REGEXP (re_openbsd_duid, "^[0-9a-f]{16}\\.[a-z]", 0) COMPILE_REGEXP (re_openbsd_dev, "^/dev/(s|w)d([0-9])([a-z])$", 0) +COMPILE_REGEXP (re_netbsd_dev, "^/dev/(l|s)d([0-9])([a-z])$", 0) static void check_architecture (guestfs_h *g, struct inspect_fs *fs); static int check_hostname_unix (guestfs_h *g, struct inspect_fs *fs); @@ -92,7 +93,8 @@ static int check_fstab (guestfs_h *g, struct inspect_fs *fs); static int add_fstab_entry (guestfs_h *g, struct inspect_fs *fs, const char *mountable, const char *mp); static char *resolve_fstab_device (guestfs_h *g, const char *spec, - Hash_table *md_map); + Hash_table *md_map, + enum inspect_os_type os_type); static int inspect_with_augeas (guestfs_h *g, struct inspect_fs *fs, const char **configfiles, int (*f) (guestfs_h *, struct inspect_fs *)); static int is_partition (guestfs_h *g, const char *partition); @@ -1049,7 +1051,7 @@ check_fstab (guestfs_h *g, struct inspect_fs *fs) mountable = safe_strdup (g, fs->mountable); else if (STRPREFIX (spec, "/dev/")) /* Resolve guest block device names. */ - mountable = resolve_fstab_device (g, spec, md_map); + mountable = resolve_fstab_device (g, spec, md_map, fs->type); else if (match (g, spec, re_openbsd_duid)) { /* In OpenBSD's fstab you can specify partitions on a disk by appending a * period and a partition letter to a Disklable Unique Identifier. The @@ -1064,7 +1066,7 @@ check_fstab (guestfs_h *g, struct inspect_fs *fs) * first disk. */ snprintf(device, 10, "%s%c", "/dev/sd0", part); - mountable = resolve_fstab_device (g, device, md_map); + mountable = resolve_fstab_device (g, device, md_map, fs->type); } /* If we haven't resolved the device successfully by this point, @@ -1548,7 +1550,8 @@ resolve_fstab_device_diskbyid (guestfs_h *g, const char *part, * anything we don't recognize unchanged. */ static char * -resolve_fstab_device (guestfs_h *g, const char *spec, Hash_table *md_map) +resolve_fstab_device (guestfs_h *g, const char *spec, Hash_table *md_map, + enum inspect_os_type os_type) { char *device = NULL; char *type, *slice, *disk, *part; @@ -1627,7 +1630,25 @@ resolve_fstab_device (guestfs_h *g, const char *spec, Hash_table *md_map) device = safe_asprintf (g, "/dev/sd%c%d", disk_i + 'a', part_i + 5); } } - else if (match3 (g, spec, re_openbsd_dev, &type, &disk, &part)) { + else if ((os_type == OS_TYPE_NETBSD) && + match3 (g, spec, re_netbsd_dev, &type, &disk, &part)) { + int disk_i = guestfs___parse_unsigned_int (g, disk); + int part_i = part[0] - 'a'; /* counting from 0 */ + free (type); + free (disk); + free (part); + + if (part_i > 3) + /* Partition 'c' is the disklabel partition and 'd' the hard disk itself. + * Not mapped under Linux. + */ + part_i -= 2; + + if (disk_i != -1 && part_i >= 0 && part_i < 24) + device = safe_asprintf (g, "/dev/sd%c%d", disk_i + 'a', part_i + 5); + } + else if ((os_type == OS_TYPE_OPENBSD) && + match3 (g, spec, re_openbsd_dev, &type, &disk, &part)) { int disk_i = guestfs___parse_unsigned_int (g, disk); int part_i = part[0] - 'a'; /* counting from 0 */ free (type); -- 2.1.3
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