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2023-05-30libmtd: Add function to get MTD info by device nameBrandon Maier
This is a convenience function for end users. In some situations it's easier to reference MTD device's by their name then by MTD number, as the name may be more reliable if device partitioning is dynamic or for porting between systems. Signed-off-by: Brandon Maier <brandon.maier@collins.com> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2018-04-10libmtd: Add support to access OOB available sizeXiaolei Li
This patch exposes OOB available size to user. Then user can use OOB free area according to OOB available size. Steps to get OOB available size: First, access /sys/class/mtd/mtdX/oobavail. If not exist, then try to get ecc layout by ioctl "ECCGETLAYOUT". If none of them work, set OOB available size to 0. Signed-off-by: Xiaolei Li <xiaolei.li@mediatek.com> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2017-03-15Fix libmtd behaviour if MTD is not present on the systemDavid Oberhollenzer
The documentation of libmtd_open says, if it returns NULL and errno is zero, MTD is not present. However, the current version always returns a libmtd_t object. The function internally checks, if it can access the MTD sysfs files and, if not, sets a flag to use the procfs fallback. This patch adds an additional check to libmtd_open, to test if the MTD procfs file can be read and fails with errno cleared if it does not exist. Furhtermore, mtd_get_info is documented to fail with errno set to ENODEV if MTD is not present. First of all, this was broken in the original version. It was implemented to specification for the sysfs code path, but if MTD is not present, that won't be executed, because of the flag set by libmtd_open. This makes the check not only redundant, but masks an actual error (the sysfs paths suddenly not being readable anymore). The legacy path that was used if the sysfs files are not avaible fails with ENOENT if it cannot read the procfs file. With the above changes in addition, we don't have a libmtd_t object if neither sysfs nor procfs is readable, so this error status no longer makes sense. This patch removes the documentation on the ENODEV errno, and makes sure that mtd_get_info always returns with apropriate errno on failure. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2016-11-17Add support for sysfs mockingDaniel Walter
In order to use test files, allow sysfs root to be set during compile time Signed-off-by: Daniel Walter <dwalter@sigma-star.at>
2016-11-17Remove unused legacy_libmtd_open internal libmtd functionDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at> Signed-off-by: Richard Weinberger <richard@nod.at>
2012-02-14limbtd: implement mtd_dev_present for old kernelsArtem Bityutskiy
Implement the 'legacy_dev_present()' function which will check whether an MTD device is present by scanning the /proc/mtd file when the MTD subsystem does not support sysfs (the case for pre-2.6.30 kernels). This patch also moves the 'mtd_dev_present()' function to a slightly more logical position. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2010-07-26libmtd: support MEMERASE64Artem Bityutskiy
This patch is base on Kevin Cernekee's patch posted to the MTD mailing list. It adds MEMERASE64 support to the 'mtd_erase()' call. Now it first tries to use MEMERASE64, and if that is not supported, falls back to the old MEMERASE ioctl. This patch also introduces an 'offs64_ioctl' flag to the libmtd descriptor. However, we cannot initialize it in 'libmtd_open()', because we need an MTD device node, which we do not have in 'libmtd_open()'. Thus, we firs mark this flag as "uninitialized", and at the first invocation of 'mtd_erase()' we initialize it. This also means that we have to pass the limbtd descriptor to 'mtd_erase()', to save the flag value. This, in turn, requires tweaking 'mtd_erase()' users. This is not very nice, but good enough so far. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2010-07-13mtd-utils: move libmtd source files to lib/ subdirectoryKevin Cernekee
Source files for libmtd, crc32, and fec are scattered throughout the tree. Move them to a central location so they can be built into a common "libmtd.a" library used by all mtd-utils programs. This patch only renames/deletes files and does not change the content. Also modify the build system and source code so that libmtd.a can be built from a "common" location (lib/). Statically link all utilities at the top level with libmtd.a . Minor changes to mkfs.ubifs to allow using the common crc32 implementation. Signed-off-by: Kevin Cernekee <cernekee@gmail.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>