diff options
| author | Xiaolei Li <xiaolei.li@mediatek.com> | 2018-04-10 15:36:55 +0800 |
|---|---|---|
| committer | David Oberhollenzer <david.oberhollenzer@sigma-star.at> | 2018-04-10 15:38:56 +0200 |
| commit | a10353584f93334b5687c598a15260c0fc5b8d3e (patch) | |
| tree | cb2916f76ba8c9cbe131b7cf632027891f94d964 /lib/libmtd.c | |
| parent | 044ed4c0dd788f980a3a1a6fc6bf855a239f12e5 (diff) | |
libmtd: Add support to access OOB available size
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>
Diffstat (limited to 'lib/libmtd.c')
| -rw-r--r-- | lib/libmtd.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/lib/libmtd.c b/lib/libmtd.c index 86c89ae..7382229 100644 --- a/lib/libmtd.c +++ b/lib/libmtd.c @@ -614,6 +614,10 @@ libmtd_t libmtd_open(void) if (!lib->mtd_oob_size) goto out_error; + lib->mtd_oobavail = mkpath(lib->mtd, MTD_OOBAVAIL); + if (!lib->mtd_oobavail) + goto out_error; + lib->mtd_region_cnt = mkpath(lib->mtd, MTD_REGION_CNT); if (!lib->mtd_region_cnt) goto out_error; @@ -637,6 +641,7 @@ void libmtd_close(libmtd_t desc) free(lib->mtd_flags); free(lib->mtd_region_cnt); free(lib->mtd_oob_size); + free(lib->mtd_oobavail); free(lib->mtd_subpage_size); free(lib->mtd_min_io_size); free(lib->mtd_size); @@ -769,6 +774,15 @@ int mtd_get_dev_info1(libmtd_t desc, int mtd_num, struct mtd_dev_info *mtd) return -1; if (dev_read_pos_int(lib->mtd_oob_size, mtd_num, &mtd->oob_size)) return -1; + if (dev_read_pos_int(lib->mtd_oobavail, mtd_num, &mtd->oobavail)) { + /* + * Fail to access oobavail sysfs file, + * try ioctl ECCGETLAYOUT. */ + mtd->oobavail = legacy_get_mtd_oobavail1(mtd_num); + /* Set 0 as default if can not get valid ecc layout */ + if (mtd->oobavail < 0) + mtd->oobavail = 0; + } if (dev_read_pos_int(lib->mtd_region_cnt, mtd_num, &mtd->region_cnt)) return -1; if (dev_read_hex_int(lib->mtd_flags, mtd_num, &ret)) |