FAT32 can be formatted with boot sign 0x28 to indicate that only serial id
is present or with boot sign 0x29 which indicates that both boot label and
serial id is present.
Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
Older FAT16 variants do not have to contain boot label or serial id. Boot
sign 0x28 indicates that only serial id is present and boot sign 0x29
indicates that both boot label and serial id is present. Other boot sign
values (e.g. zero) indicates older FAT16 variant without boot label and
boot sign.
Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
"When you discover you're riding a dead horse, the best strategy is to dismount."
EVMS is dead since 2006, LVM is the winner.
Signed-off-by: Karel Zak <kzak@redhat.com>
* Don't use 'size_t len' variable for utf8_encoded_valid_unichar()
return code as it returns negative numbers on invalid utf8 sequence.
* Don't rely only on \0, but check the current position against output
buffer size.
* Accept hex encoding like the original version.
* Use else-if to avoid unnecessary 'continue'.
Signed-off-by: Karel Zak <kzak@redhat.com>
libblkid/src/probe.c:1012:22: error: ‘BLKGETZONESZ’ undeclared (first use in this function)
1012 | if (!ioctl(pr->fd, BLKGETZONESZ, &zone_size_sector))
| ^~~~~~~~~~~~
Signed-off-by: Karel Zak <kzak@redhat.com>
* next: (26 commits)
build-sys: add script to compare config.h from meson and autotools
meson: add missing header files check
docs: update TODO
tests: update lscpu outputs
lscpu: read MHZ from /sys/.../cpufreq/scaling_cur_freq
lscpu: use locale-independent strtod() when read from kernel
lib/c_strtod; add locale independent strtod()
tests: update lscpu output
lscpu: use MHZ as number to be locale sensitive
lscpu: add SCALMHZ% and "CPU scaling MHz:"
sulogin: fix whitespace error
sulogin: ignore none-existing console devices
lsns: fix old error message
lsns: fix copy & past in man page
lsns: fill UID and USER columns for interpolated namespaces
fixup! lsns: interpolate missing namespaces for converting forests to a tree
lsns: interpolate missing namespaces for converting forests to a tree
lsns: reorganize members specifying other namespaces in lsns_namespace
lsns: make namespace having no process printable
libblkid: support zone reset for wipefs
...
We cannot overwrite superblock magic in a sequential required zone. So,
wipefs cannot work as it is. Instead, this commit implements the wiping by
zone resetting.
Zone resetting must be done only for a sequential write zone. This is
checked by is_conventional().
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
This commit adds zone-aware magics and probing functions for zoned btrfs.
The superblock (and its copies) are the only data structure in btrfs with a
fixed location on a device. Since we cannot do overwrites in a sequential
write required zone, we cannot place the superblock in the zone.
Thus, zoned btrfs uses superblock log writing to update superblocks on
sequential write required zones. It uses two zones as a circular buffer to
write updated superblocks. Once the first zone is filled up, start writing
into the second buffer. When both zones are filled up, and before starting
to write to the first zone again, it reset the first zone.
We can determine the position of the latest superblock by reading the write
pointer information from a device. One corner case is when both zones are
full. For this situation, we read out the last superblock of each zone and
compare them to determine which zone is older.
The magics can detect a superblock magic ("_BHRfs_M") at the beginning of
zone #0 or zone #1 to see if it is zoned btrfs. When both zones are filled
up, zoned btrfs resets the first zone to write a new superblock. If btrfs
crashes at the moment, we do not see a superblock at zone #0. Thus, we need
to check not only zone #0 but also zone #1.
It also supports the temporary magic ("!BHRfS_M") in zone #0. Mkfs.btrfs
first writes the temporary superblock to the zone during the mkfs process.
It will survive there until the zones are filled up and reset. So, we also
need to detect this temporary magic.
Finally, this commit extends probe_btrfs() to load the latest superblock
determined by the write pointers.
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
This patch makes libblkid zone-aware. It can probe the magic located at
some offset from the beginning of some specific zone of a device.
This patch introduces some new fields to struct blkid_idmag. They indicate
the magic location is placed related to a zone and the offset in the zone.
Also, this commit introduces `zone_size` to struct blkid_struct_probe. It
stores the size of zones of a device.
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
* rename MANPAGES_EXTRA= to ADOCFILES_COMMON=
* keep track about individual adoc files by dist_noinst_DATA=
This variable is not effected by automake conditions, so the files
are always distributed.
Signed-off-by: Karel Zak <kzak@redhat.com>
The current libblkid ignores FAT when created on the same whole-disk
device as valid MBR. This restriction is not compatible with many
devices (like USB flash disk) created by Windows or the latest
dosfstools where the first partition is used for entire device and
where is also valid FAT. The filesystem is accessible from partition
as well as from whole-disk device.
The conclusion (between util-linux, dosfstools and udisks) is that
libblkid has to provide all details, not hide anything and the proper
policy (hide/show) has to be implemented by udisks (or so).
CC: Tomáš Bžatek <tbzatek@redhat.com>
CC: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Karel Zak <kzak@redhat.com>
We need to evaluate "include::" directive relatively to project
top-level source directory rather than to the current document
location.
Signed-off-by: Karel Zak <kzak@redhat.com>
The symlinks are generated by asciidoctor and current dist_man_MANS
depends on order (nan page before man link). This solutions is useless
when execute "make -j". The real solution is to keep man pages in
separate variable and use only this variable evaluate what we need to
generate.
Signed-off-by: Karel Zak <kzak@redhat.com>
The whole thing is complicated by the fact that we have two layers
of libraries: e.g. libmount also needs libblkid. If we just tell meson
to make libmount static, this is not enough, because we also need it
to link to a static libblkid. Hence in the case of libs that link to
other libs internally, we need to create a different object with a
a different set of link_with items.
To avoid building the libraries twice, libfdisk and libmount are first
built into an internal "convenience" library, which is then linked into
the static and shared versions as appropriate.
To build: meson build && ninja -C build
To run tests: ninja -C build check
To install for packaging: DESTDIR=/var/tmp/inst ninja -C build install
To install for realz: sudo ninja -C build install
v2:
- Optional items are now based on the 'feature' feature in meson.
Built libraries which are disabled turn into disabler() objects
and also poison any executables which link to them.
What is there:
- building of the binaries and libs and the python module
- installation of binaries, libs, python module, localization files,
man pages, pkgconfig files
- running of tests
- most options to configure build equivalently to the
./configure settings
Partially implemented:
- disabling of stuff when things missing. In the C code, the defines
are all used, so that should be fine. In the build system, some
files should be skipped, but that is probably not always done properly.
Getting this right might require some testing of various build option
combinations to get the details right.
Not implemented:
- static builds of fdisk and other binaries
- things marked with XXX or FIXME
- ???
Differences:
- .la files are not created. They are useless and everybody hates them.
- Requires.private in pkgconfig files are not present in the
autogenerated .pc file. Not sure if they should be there or not. If
necessary, they can be added by hand.
- man pages and systemd units are installed by the install target. Not
sure why 'make install' doesn't do that.
- the split between / and /usr is probably wrong. But it's all pointless
anyway, so maybe we could simplify things but not implementing it at
all under meson?
The current GFS2 prober hard codes superblock constants, but these
constants are affected by GFS2 development.
Addresses: https://bugzilla.redhat.com/show_bug.cgi?id=1913844
Signed-off-by: Karel Zak <kzak@redhat.com>
udf superblock code already sets VOLUME_SET_ID to Volume Set Identifier
from UDF Primary Volume Descriptor.
In iso9660 similar meaning has Volume Set Identifier in ISO9660
Primary (or Supplementary Joliet) Volume Descriptor. Therefore exports it
as VOLUME_SET_ID label.
In ISO9660 Primary (and Supplementary Joliet) Volume Descriptor exists
another member Data Preparer Identifier which is currently not parsed by
iso9660 superblock code.
To have iso9660 superblock code feature complete export also Data Preparer
Identifier as DATA_PREPARER_ID label. UDF does not have equivalent of Data
Preparer Identifier.
Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
Joliet may contain UNICODE variant of these identifiers. So prefer UNICODE
variant from Joliet over ASCII variant if Joliet one is available.
Also use same technique as for Label for reconstructing original UNICODE
variants of these identifiers.
Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
Label in Joliet is UNICODE (UTF16BE) but can contain only 16 characters.
Label in PVD is subset of ASCII but can contain up to the 32 characters.
Non-representable characters are stored as replacement character '_'.
Label in Joliet is in most cases trimmed but UNICODE version of label in
PVD. Based on these facts try to reconstruct original label if label in
Joliet is prefix of the label in PVD (ignoring non-representable
characters).
It is possible that label in Joliet and PVD are totally different. In this
case label from Joliet as prior this change.
Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
ECMA 119 (ISO 9660) does not mandate that Primary Volume Descriptor needs
to be the first in Volume Descriptor Set sequence.
Move assignment of labels outside of the for-loop and correctly detects
Primary Volume Descriptor via its type (0x01) at any position in sequence.
Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
ECMA 119 (ISO 9660) says that if the first byte is set to (5F), the
remaining bytes of this field shall specify an identifier for a file
containing the data. As libblkid does not support reading files from the
filesystem itself it cannot parse fields which starts with 0x5F '_' char.
So for now ignore iso->publisher_id and iso->application_id values which
starts with '_' character.
Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
ECMA 119 (ISO 9660) does not say anything if all bytes are of these fields
are FILLER then fields are not set. It says it for iso->publisher_id and
iso->application_id.
Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
Enhanced Read-Only File System (EROFS) has been included in Linux
kernel, many Linux distributions, buildroot and Android AOSP for
a while. Plus, nowadays, it's known that EROFS has been commercially
used by several Android vendors for their system partitions.
util-linux in busybox can also detect it recently.
This patch adds support for detecting EROFS filesystem to libblkid.
Signed-off-by: Gao Xiang <hsiangkao@redhat.com>
iso9660 superblock code already sets PUBLISHER_ID to Publisher Identifier
from ISO9660 Supplementary Volume Descriptor.
In udf field LVInfo1 from Implementation Use Volume Descriptor could
contain information such as Owner Name. More UDF generating tools
(e.g. Solaris's labelit or Linux udftools 2.3+) set this field to person
who creating the filesystem therefore its meaning is similar to ISO9660
Publisher Identifier. So for compatibility with iso9660 superblock code
export this field via PUBLISHER_ID label.
Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
iso9660 superblock code already sets APPLICATION_ID to Application
Identifier from ISO9660 Supplementary Volume Descriptor.
In udf similar meaning has Application Identifier from UDF Primary Volume
Descriptor. Therefore exports it as APPLICATION_ID label.
More tools for generating hybrid ISO+UDF images (e.g. genisoimage, mkisofs
or nero) set Application Identifier in UDF Primary Volume Descriptor to
just empty string. But they set Implementation Identifier in UDF Primary
Volume Descriptor to their tool name.
So if Application Identifier is empty then exports Implementation
Identifier as APPLICATION_ID label.
Please note that Application Identifier and Implementation Identifier are
stored in UDF only in ASCII, not UNICODE.
Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
dstring structures are in UL_ENCODE_LATIN1/UL_ENCODE_UTF16BE encodings only
when corresponding desc_charset structures are set to the OSTA Compressed
Unicode. So add missing checks.
Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
* pali/multisesssion:
libblkid: udf: add support for unclosed sequential Write-Once media
libblkid: udf: add support for multisession via session_offset hint
libblkid: iso9660: add support for multisession via session_offset hint
libblkid: fix blkid_probe_get_sb() to use hint offset calculation
libblkid: allow to specify offset defined by hint for blkid_probe_get_idmag()
libblkid: detect session_offset hint for optical discs
libblkid: do size correction of optical discs also by last written sector
libblkid: detect CD/DVD discs in packet writing mode
libblkid: overwrite existing hint
libblkid: export blkid_probe_reset_hints()
blkid: add --hint <name>=value
libblkid: add blkid_probe_{set,get}_hint()
Rafael Fontenelle
Karel Zak
Pali Rohár
John Baublitz
Naohiro Aota
Christian Hesse
Mario Blättermann
Zbigniew Jędrzejewski-Szmek
Ville Skyttä
Gao Xiang
nick black