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| author | Enrico Jorns <ejo@pengutronix.de> | 2016-10-04 12:10:48 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2016-10-24 08:14:41 +0200 |
| commit | 8a0fb01161aeecec01944b9df57d69ca614596de (patch) | |
| tree | 971a31c5309fcac7e9672cab8d47f3dec6d642b8 /fs | |
| parent | 9bcbb51263b5f21981651cd146dec439def797e3 (diff) | |
| download | barebox-8a0fb01161aeecec01944b9df57d69ca614596de.tar.gz barebox-8a0fb01161aeecec01944b9df57d69ca614596de.tar.xz | |
fs: squashfs: append linux rootarg for ubi volume
If squashfs runs from an ubi volume, append appropriate root kernel
options.
Note that ubiblock support is required in the kernel for that.
Signed-off-by: Enrico Jorns <ejo@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/squashfs/squashfs.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/fs/squashfs/squashfs.c b/fs/squashfs/squashfs.c index 6d046810d9..c4d0bac974 100644 --- a/fs/squashfs/squashfs.c +++ b/fs/squashfs/squashfs.c @@ -9,12 +9,16 @@ #include <linux/fs.h> #include <linux/stat.h> #include <linux/pagemap.h> +#include <linux/mtd/ubi.h> +#include <linux/mtd/mtd.h> #include "squashfs_fs.h" #include "squashfs_fs_sb.h" #include "squashfs_fs_i.h" #include "squashfs.h" +struct ubi_volume_desc; + char *squashfs_devread(struct squashfs_sb_info *fs, int byte_offset, int byte_len) { @@ -108,6 +112,31 @@ static struct inode *squashfs_findfile(struct super_block *sb, return NULL; } +void squashfs_set_rootarg(struct squashfs_priv *priv, struct fs_device_d *fsdev) +{ + struct ubi_volume_desc *ubi_vol; + struct ubi_volume_info vi = {}; + struct ubi_device_info di = {}; + struct mtd_info *mtd; + char *str; + + ubi_vol = ubi_open_volume_cdev(fsdev->cdev, UBI_READONLY); + + if (IS_ERR(ubi_vol)) + return; + + ubi_get_volume_info(ubi_vol, &vi); + ubi_get_device_info(vi.ubi_num, &di); + mtd = di.mtd; + + str = basprintf("root=/dev/ubiblock%d_%d ubi.mtd=%s ubi.block=%d,%d rootfstype=squashfs", + vi.ubi_num, vi.vol_id, mtd->cdev.partname, vi.ubi_num, vi.vol_id); + + fsdev_set_linux_rootarg(fsdev, str); + + free(str); +} + static int squashfs_probe(struct device_d *dev) { struct fs_device_d *fsdev; @@ -130,6 +159,8 @@ static int squashfs_probe(struct device_d *dev) goto err_out; } + squashfs_set_rootarg(priv, fsdev); + return 0; err_out: |