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Subject[PATCH 1/2] fat: Clean up xlate_to_uni.
Date
 The xlate_to_uni is called by vfat_build_slots with sbi->nls_io as the final
argument. nls_io can never be null at this point because the check is already being done in fat_fill_super wherein the mount fails if it is null.

Signed-off-by: Namjae Jeon <linkinjeon@gmail.com>
Signed-off-by: Ravishankar N <cyberax82@gmail.com>
---
fs/fat/namei_vfat.c | 83 ++++++++++++++++++++++-----------------------------
1 files changed, 36 insertions(+), 47 deletions(-)

diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c
index a81eb23..aae3b4e 100644
--- a/fs/fat/namei_vfat.c
+++ b/fs/fat/namei_vfat.c
@@ -521,57 +521,46 @@ xlate_to_uni(const unsigned char *name, int len, unsigned char *outname,

op = &outname[*outlen * sizeof(wchar_t)];
} else {
- if (nls) {
- for (i = 0, ip = name, op = outname, *outlen = 0;
- i < len && *outlen <= FAT_LFN_LEN;
- *outlen += 1)
- {
- if (escape && (*ip == ':')) {
- if (i > len - 5)
- return -EINVAL;
- ec = 0;
- for (k = 1; k < 5; k++) {
- nc = ip[k];
- ec <<= 4;
- if (nc >= '0' && nc <= '9') {
- ec |= nc - '0';
- continue;
- }
- if (nc >= 'a' && nc <= 'f') {
- ec |= nc - ('a' - 10);
- continue;
- }
- if (nc >= 'A' && nc <= 'F') {
- ec |= nc - ('A' - 10);
- continue;
- }
- return -EINVAL;
+ for (i = 0, ip = name, op = outname, *outlen = 0;
+ i < len && *outlen <= FAT_LFN_LEN;
+ *outlen += 1) {
+ if (escape && (*ip == ':')) {
+ if (i > len - 5)
+ return -EINVAL;
+ ec = 0;
+ for (k = 1; k < 5; k++) {
+ nc = ip[k];
+ ec <<= 4;
+ if (nc >= '0' && nc <= '9') {
+ ec |= nc - '0';
+ continue;
}
- *op++ = ec & 0xFF;
- *op++ = ec >> 8;
- ip += 5;
- i += 5;
- } else {
- if ((charlen = nls->char2uni(ip, len - i, (wchar_t *)op)) < 0)
- return -EINVAL;
- ip += charlen;
- i += charlen;
- op += 2;
+ if (nc >= 'a' && nc <= 'f') {
+ ec |= nc - ('a' - 10);
+ continue;
+ }
+ if (nc >= 'A' && nc <= 'F') {
+ ec |= nc - ('A' - 10);
+ continue;
+ }
+ return -EINVAL;
}
+ *op++ = ec & 0xFF;
+ *op++ = ec >> 8;
+ ip += 5;
+ i += 5;
+ } else {
+ charlen = nls->char2uni(ip, len - i,
+ (wchar_t *)op);
+ if (charlen < 0)
+ return -EINVAL;
+ ip += charlen;
+ i += charlen;
+ op += 2;
}
- if (i < len)
- return -ENAMETOOLONG;
- } else {
- for (i = 0, ip = name, op = outname, *outlen = 0;
- i < len && *outlen <= FAT_LFN_LEN;
- i++, *outlen += 1)
- {
- *op++ = *ip++;
- *op++ = 0;
- }
- if (i < len)
- return -ENAMETOOLONG;
}
+ if (i < len)
+ return -ENAMETOOLONG;
}

*longlen = *outlen;
--
1.7.5.4


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