Commit graph

14 commits

Author SHA1 Message Date
Denys Vlasenko
cdcb4ce314 volume_id: improve handling of too-small (usually zero-byte or erroring) blockdevs
function                                             old     new   delta
volume_id_get_buffer                                 327     372     +45
volume_id_open_node                                   17      24      +7
volume_id_probe_all                                  133     123     -10
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/1 up/down: 52/-10)             Total: 42 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2026-02-04 15:59:33 +01:00
Alyssa Ross via busybox
7310339e73 volume_id: volume_id_get_buffer with small FSes
I was working with some very small ext4 filesystems, used for
overlaying on immutable VM/container images.  If it's only desired to
overlay a single config file, these filesystems can be very small
indeed, and so ran afoul of this length check.

Since 4fc5ec56f ("device matching against UUIDs: do not try
floppies") (from 2009), floppy drives are skipped before this function
is even called.  Reading from an unused loop device returns 0, so it
should be fine to reduce  the minimum length.

Signed-off-by: Alyssa Ross via busybox <busybox@busybox.net>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2026-02-04 13:30:24 +01:00
Denys Vlasenko
3e80101963 uuidgen: move UUID formatting to libbb
function                                             old     new   delta
format_uuid_DCE_37_chars                               -      94     +94
uuidgen_main                                          71      53     -18
.rodata                                           107089  107066     -23
mkswap_main                                          278     253     -25
volume_id_set_uuid                                   258     178     -80
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/4 up/down: 94/-146)           Total: -52 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2026-02-03 09:10:25 +01:00
Denys Vlasenko
6967578728 whitespace fixes. no code changes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2013-01-14 01:34:48 +01:00
Sven-Göran Bergh
5218515508 volume_id: uuid_format small code shrink
function                                             old     new   delta
volume_id_set_uuid                                   318     300     -18

Signed-off-by: Sven-Göran Bergh <sgb@systemasis.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2013-01-14 00:52:03 +01:00
Sven-Göran Bergh
07b419dbcb volume_id: display hfs[+] 128-bit UUID properly
Signed-off-by: Sven-Göran Bergh <sgb@systemasis.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2013-01-14 00:37:00 +01:00
Denys Vlasenko
8019b3a7ae volume_id: code shrink
function                                             old     new   delta
volume_id_set_unicode16                              200     173     -27

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2012-09-02 15:33:47 +02:00
Denis Vlasenko
28ea4298e3 volume_id: abort early on read failures.
should help with probing missing fdd's
2009-02-15 05:51:19 +00:00
Denis Vlasenko
1e10afcdfb volume_id/fat: careful with sector#, it may not fit in 32 bits. +91 bytes
volume_id/*: a bit of code shrink
2008-11-30 17:41:31 +00:00
Denis Vlasenko
d5e305944a findfs: fix LUKS and FAT detection routines; do not exit if corrupted
FAT fs makes us try to seek past volume

function                                             old     new   delta
volume_id_get_buffer                                 301     327     +26
volume_id_probe_luks                                  79      82      +3
get_attr_volume_id                                    73      65      -8
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/1 up/down: 29/-8)              Total: 21 bytes
2008-10-12 11:17:49 +00:00
Denis Vlasenko
f5d8c90d73 style fixes, no code changes 2008-06-26 14:32:57 +00:00
Denis Vlasenko
77ad97f199 more -Wall warning fixes from Cristian Ionescu-Idbohrn.
This time it resulted in small code changes:

function                                             old     new   delta
nexpr                                                820     828      +8
tail_main                                           1200    1202      +2
wrapf                                                166     167      +1
parse_mount_options                                  227     209     -18
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/1 up/down: 11/-18)             Total: -7 bytes
2008-05-13 02:27:31 +00:00
Denis Vlasenko
c5b737231d volude_id: remove unused fields and functions which were setting them
function                                             old     new   delta
uuidcache_init                                       567     704    +137
findfs_main                                            -     125    +125
packed_usage                                       23662   23694     +32
static.drive_name_string                               -      14     +14
applet_names                                        1815    1822      +7
applet_main                                         1104    1108      +4
volume_id_open_node                                   35      38      +3
applet_nameofs                                       552     554      +2
get_devname_from_label                                78      79      +1
applet_install_loc                                   138     139      +1
volume_id_set_label_unicode16                         31      27      -4
volume_id_set_label_string                            74      70      -4
get_devname_from_uuid                                 63      59      -4
fs1                                                   12       8      -4
volume_id_set_unicode16                              209     202      -7
volume_id_free_buffer                                 71      56     -15
free_volume_id                                        52      37     -15
volume_id_probe_luks                                  97      79     -18
volume_id_set_usage_part                              21       -     -21
volume_id_probe_ufs                                  148     126     -22
volume_id_probe_lsi_mega_raid                        131     108     -23
volume_id_probe_highpoint_45x_raid                   127     104     -23
volume_id_probe_highpoint_37x_raid                    87      63     -24
volume_id_set_usage                                   28       -     -28
volume_id_probe_romfs                                121      93     -28
volume_id_set_label_raw                               30       -     -30
volume_id_probe_promise_fasttrack_raid               174     144     -30
volume_id_set_uuid                                   373     342     -31
volume_id_probe_xfs                                  122      91     -31
volume_id_probe_jfs                                  138     107     -31
volume_id_probe_ocfs2                                139     107     -32
volume_id_probe_lvm1                                  90      58     -32
volume_id_probe_cramfs                               106      63     -43
volume_id_probe_via_raid                             145     101     -44
volume_id_probe_intel_software_raid                  153     108     -45
volume_id_probe_minix                                121      74     -47
volume_id_probe_udf                                  682     632     -50
volume_id_probe_nvidia_raid                          158     108     -50
volume_id_probe_lvm2                                 128      78     -50
volume_id_probe_hpfs                                 117      67     -50
volume_id_probe_ext                                  143      93     -50
volume_id_probe_linux_raid                           191     139     -52
volume_id_probe_sysv                                 244     187     -57
volume_id_probe_silicon_medley_raid                  158      97     -61
usage_to_string                                       64       -     -64
volume_id_probe_linux_swap                           263     198     -65
volume_id_get_buffer                                 372     307     -65
volume_id_probe_iso9660                              412     332     -80
volume_id_probe_hfs_hfsplus                          888     806     -82
volume_id_probe_ntfs                                 396     294    -102
volume_id_probe_vfat                                 980     872    -108
volume_id_probe_reiserfs                             417     268    -149
dev_get_major_minor                                  175       -    -175
uuidcache_check_device                               692     499    -193
volume_id_probe_mac_partition_map                    697       -    -697
------------------------------------------------------------------------------
(add/remove: 2/6 grow/shrink: 8/39 up/down: 326/-2836)      Total: -2510 bytes
   text    data     bss     dec     hex filename
 797220     662    7420  805302   c49b6 busybox_old
 794244     662    7420  802326   c3e16 busybox_unstripped
2008-03-17 09:21:26 +00:00
Denis Vlasenko
de7684a309 support for mount by label (not yet tested)
Also adds findfs applet. Closes bug 1143.
2008-02-18 21:08:49 +00:00