Commit 979a6e28 authored by Jan Kara's avatar Jan Kara

udf: Get rid of 0-length arrays in struct fileIdentDesc

Get rid of 0-length arrays in struct fileIdentDesc. This requires a bit
of cleaning up as the second variable length array in this structure is
often used and the code abuses the fact that the first two arrays have
the same type and offset in struct fileIdentDesc.
Signed-off-by: default avatarJan Kara <jack@suse.cz>
parent b3c8c980
...@@ -35,7 +35,6 @@ ...@@ -35,7 +35,6 @@
#include "udf_i.h" #include "udf_i.h"
#include "udf_sb.h" #include "udf_sb.h"
static int udf_readdir(struct file *file, struct dir_context *ctx) static int udf_readdir(struct file *file, struct dir_context *ctx)
{ {
struct inode *dir = file_inode(file); struct inode *dir = file_inode(file);
...@@ -135,7 +134,7 @@ static int udf_readdir(struct file *file, struct dir_context *ctx) ...@@ -135,7 +134,7 @@ static int udf_readdir(struct file *file, struct dir_context *ctx)
lfi = cfi.lengthFileIdent; lfi = cfi.lengthFileIdent;
if (fibh.sbh == fibh.ebh) { if (fibh.sbh == fibh.ebh) {
nameptr = fi->fileIdent + liu; nameptr = udf_get_fi_ident(fi);
} else { } else {
int poffset; /* Unpaded ending offset */ int poffset; /* Unpaded ending offset */
...@@ -153,7 +152,7 @@ static int udf_readdir(struct file *file, struct dir_context *ctx) ...@@ -153,7 +152,7 @@ static int udf_readdir(struct file *file, struct dir_context *ctx)
} }
} }
nameptr = copy_name; nameptr = copy_name;
memcpy(nameptr, fi->fileIdent + liu, memcpy(nameptr, udf_get_fi_ident(fi),
lfi - poffset); lfi - poffset);
memcpy(nameptr + lfi - poffset, memcpy(nameptr + lfi - poffset,
fibh.ebh->b_data, poffset); fibh.ebh->b_data, poffset);
......
...@@ -471,9 +471,9 @@ struct fileIdentDesc { ...@@ -471,9 +471,9 @@ struct fileIdentDesc {
uint8_t lengthFileIdent; uint8_t lengthFileIdent;
struct long_ad icb; struct long_ad icb;
__le16 lengthOfImpUse; __le16 lengthOfImpUse;
uint8_t impUse[0]; uint8_t impUse[];
uint8_t fileIdent[0]; /* uint8_t fileIdent[]; */
uint8_t padding[0]; /* uint8_t padding[]; */
} __packed; } __packed;
/* File Characteristics (ECMA 167r3 4/14.4.3) */ /* File Characteristics (ECMA 167r3 4/14.4.3) */
......
...@@ -390,8 +390,7 @@ struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, ...@@ -390,8 +390,7 @@ struct buffer_head *udf_expand_dir_adinicb(struct inode *inode,
dfibh.eoffset += (sfibh.eoffset - sfibh.soffset); dfibh.eoffset += (sfibh.eoffset - sfibh.soffset);
dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset); dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset);
if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse, if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse,
sfi->fileIdent + udf_get_fi_ident(sfi))) {
le16_to_cpu(sfi->lengthOfImpUse))) {
iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
brelse(dbh); brelse(dbh);
return NULL; return NULL;
......
...@@ -74,12 +74,11 @@ int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi, ...@@ -74,12 +74,11 @@ int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi,
if (fileident) { if (fileident) {
if (adinicb || (offset + lfi < 0)) { if (adinicb || (offset + lfi < 0)) {
memcpy((uint8_t *)sfi->fileIdent + liu, fileident, lfi); memcpy(udf_get_fi_ident(sfi), fileident, lfi);
} else if (offset >= 0) { } else if (offset >= 0) {
memcpy(fibh->ebh->b_data + offset, fileident, lfi); memcpy(fibh->ebh->b_data + offset, fileident, lfi);
} else { } else {
memcpy((uint8_t *)sfi->fileIdent + liu, fileident, memcpy(udf_get_fi_ident(sfi), fileident, -offset);
-offset);
memcpy(fibh->ebh->b_data, fileident - offset, memcpy(fibh->ebh->b_data, fileident - offset,
lfi + offset); lfi + offset);
} }
...@@ -88,11 +87,11 @@ int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi, ...@@ -88,11 +87,11 @@ int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi,
offset += lfi; offset += lfi;
if (adinicb || (offset + padlen < 0)) { if (adinicb || (offset + padlen < 0)) {
memset((uint8_t *)sfi->padding + liu + lfi, 0x00, padlen); memset(udf_get_fi_ident(sfi) + lfi, 0x00, padlen);
} else if (offset >= 0) { } else if (offset >= 0) {
memset(fibh->ebh->b_data + offset, 0x00, padlen); memset(fibh->ebh->b_data + offset, 0x00, padlen);
} else { } else {
memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset); memset(udf_get_fi_ident(sfi) + lfi, 0x00, -offset);
memset(fibh->ebh->b_data, 0x00, padlen + offset); memset(fibh->ebh->b_data, 0x00, padlen + offset);
} }
...@@ -226,7 +225,7 @@ static struct fileIdentDesc *udf_find_entry(struct inode *dir, ...@@ -226,7 +225,7 @@ static struct fileIdentDesc *udf_find_entry(struct inode *dir,
lfi = cfi->lengthFileIdent; lfi = cfi->lengthFileIdent;
if (fibh->sbh == fibh->ebh) { if (fibh->sbh == fibh->ebh) {
nameptr = fi->fileIdent + liu; nameptr = udf_get_fi_ident(fi);
} else { } else {
int poffset; /* Unpaded ending offset */ int poffset; /* Unpaded ending offset */
...@@ -246,7 +245,7 @@ static struct fileIdentDesc *udf_find_entry(struct inode *dir, ...@@ -246,7 +245,7 @@ static struct fileIdentDesc *udf_find_entry(struct inode *dir,
} }
} }
nameptr = copy_name; nameptr = copy_name;
memcpy(nameptr, fi->fileIdent + liu, memcpy(nameptr, udf_get_fi_ident(fi),
lfi - poffset); lfi - poffset);
memcpy(nameptr + lfi - poffset, memcpy(nameptr + lfi - poffset,
fibh->ebh->b_data, poffset); fibh->ebh->b_data, poffset);
......
...@@ -130,6 +130,10 @@ static inline unsigned int udf_dir_entry_len(struct fileIdentDesc *cfi) ...@@ -130,6 +130,10 @@ static inline unsigned int udf_dir_entry_len(struct fileIdentDesc *cfi)
le16_to_cpu(cfi->lengthOfImpUse) + cfi->lengthFileIdent, le16_to_cpu(cfi->lengthOfImpUse) + cfi->lengthFileIdent,
UDF_NAME_PAD); UDF_NAME_PAD);
} }
static inline uint8_t *udf_get_fi_ident(struct fileIdentDesc *fi)
{
return ((uint8_t *)(fi + 1)) + le16_to_cpu(fi->lengthOfImpUse);
}
/* file.c */ /* file.c */
extern long udf_ioctl(struct file *, unsigned int, unsigned long); extern long udf_ioctl(struct file *, unsigned int, unsigned long);
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment