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authorÁlvaro Fernández Rojas <noltari@gmail.com>2020-06-02 17:47:57 +0200
committerÁlvaro Fernández Rojas <noltari@gmail.com>2020-06-02 18:23:40 +0200
commit1fd3dabfaf189f4ebe23c131b260fda52cc7f002 (patch)
tree95559f9a2720e02aed5c7b0a2651dbb39b1d6469 /target/linux/generic/files
parenteed8a927eeada76626dc34dc13a834a5c533efb4 (diff)
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kernel: mtdsplit: improve JFFS2 scan
Allow retrieving full file name and length by parameters. Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Diffstat (limited to 'target/linux/generic/files')
-rw-r--r--target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_bcm_wfi.c26
1 files changed, 20 insertions, 6 deletions
diff --git a/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_bcm_wfi.c b/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_bcm_wfi.c
index cf57f59a58..7487567ed5 100644
--- a/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_bcm_wfi.c
+++ b/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_bcm_wfi.c
@@ -57,7 +57,8 @@ static bool jffs2_dirent_valid(struct jffs2_raw_dirent *node)
static int jffs2_find_file(struct mtd_info *mtd, uint8_t *buf,
const char *name, size_t name_len,
- loff_t *offs, loff_t size)
+ loff_t *offs, loff_t size,
+ char **out_name, size_t *out_name_len)
{
const loff_t end = *offs + size;
struct jffs2_raw_dirent *node;
@@ -97,10 +98,22 @@ static int jffs2_find_file(struct mtd_info *mtd, uint8_t *buf,
}
if (!memcmp(node->name, OPENWRT_NAME,
- OPENWRT_NAME_LEN))
+ OPENWRT_NAME_LEN)) {
valid = true;
- else if (!memcmp(node->name, name, name_len))
- return valid ? 0 : -EINVAL;
+ } else if (!memcmp(node->name, name, name_len)) {
+ if (!valid)
+ return -EINVAL;
+
+ if (out_name)
+ *out_name = kstrndup(node->name,
+ node->nsize,
+ GFP_KERNEL);
+
+ if (out_name_len)
+ *out_name_len = node->nsize;
+
+ return 0;
+ }
block_offs += je32_to_cpu(node->totlen);
block_offs = (block_offs + 0x3) & ~0x3;
@@ -145,7 +158,7 @@ static int parse_bcm_wfi(struct mtd_info *master,
ret = jffs2_find_file(master, buf, CFERAM_NAME,
CFERAM_NAME_LEN, &cfe_off,
- size - (cfe_off - off));
+ size - (cfe_off - off), NULL, NULL);
if (ret)
return ret;
@@ -155,7 +168,8 @@ static int parse_bcm_wfi(struct mtd_info *master,
}
ret = jffs2_find_file(master, buf, KERNEL_NAME, KERNEL_NAME_LEN,
- &kernel_off, size - (kernel_off - off));
+ &kernel_off, size - (kernel_off - off),
+ NULL, NULL);
if (ret)
return ret;