From mboxrd@z Thu Jan 1 00:00:00 1970 From: Xiaolei Li Subject: [PATCH 1/2] libmtd: Add support to access OOB available size Date: Mon, 9 Apr 2018 11:10:09 +0800 Message-ID: <1523243410-65424-2-git-send-email-xiaolei.li@mediatek.com> References: <1523243410-65424-1-git-send-email-xiaolei.li@mediatek.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1523243410-65424-1-git-send-email-xiaolei.li-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+glpam-linux-mediatek=m.gmane.org-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org To: david.oberhollenzer-S6VGOU4v5edDinCvNWH78Q@public.gmane.org, boris.brezillon-LDxbnhwyfcJBDgjK7y7TUQ@public.gmane.org Cc: linux-mediatek-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, xiaolei.li-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org, linux-mtd-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, srv_heupstream-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org List-Id: linux-mediatek@lists.infradead.org Fetch OOB available size by accessing /sys/class/mtd/mtdX/oobavail. Signed-off-by: Xiaolei Li --- This patch depends on the reviewing patch "mtd: Add sysfs attribute for mtd OOB available size"[1]. [1] https://patchwork.kernel.org/patch/10319475/ --- include/libmtd.h | 2 ++ lib/libmtd.c | 7 +++++++ lib/libmtd_int.h | 3 +++ 3 files changed, 12 insertions(+) diff --git a/include/libmtd.h b/include/libmtd.h index db85fb4..cc24af8 100644 --- a/include/libmtd.h +++ b/include/libmtd.h @@ -66,6 +66,7 @@ struct mtd_info * @min_io_size: minimum input/output unit size * @subpage_size: sub-page size * @oob_size: OOB size (zero if the device does not have OOB area) + * @oobavail: free OOB size * @region_cnt: count of additional erase regions * @writable: zero if the device is read-only * @bb_allowed: non-zero if the MTD device may have bad eraseblocks @@ -84,6 +85,7 @@ struct mtd_dev_info int min_io_size; int subpage_size; int oob_size; + int oobavail; int region_cnt; unsigned int writable:1; unsigned int bb_allowed:1; diff --git a/lib/libmtd.c b/lib/libmtd.c index 86c89ae..76a9439 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 +774,8 @@ 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)) + return -1; 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)) diff --git a/lib/libmtd_int.h b/lib/libmtd_int.h index 03b0863..3cab32b 100644 --- a/lib/libmtd_int.h +++ b/lib/libmtd_int.h @@ -44,6 +44,7 @@ extern "C" { #define MTD_MIN_IO_SIZE "writesize" #define MTD_SUBPAGE_SIZE "subpagesize" #define MTD_OOB_SIZE "oobsize" +#define MTD_OOBAVAIL "oobavail" #define MTD_REGION_CNT "numeraseregions" #define MTD_FLAGS "flags" @@ -63,6 +64,7 @@ extern "C" { * @mtd_min_io_size: minimum I/O unit size file pattern * @mtd_subpage_size: sub-page size file pattern * @mtd_oob_size: MTD device OOB size file pattern + * @mtd_oobavail: MTD device free OOB size file pattern * @mtd_region_cnt: count of additional erase regions file pattern * @mtd_flags: MTD device flags file pattern * @sysfs_supported: non-zero if sysfs is supported by MTD @@ -92,6 +94,7 @@ struct libmtd char *mtd_min_io_size; char *mtd_subpage_size; char *mtd_oob_size; + char *mtd_oobavail; char *mtd_region_cnt; char *mtd_flags; unsigned int sysfs_supported:1; -- 1.9.1