#include <linux/smp_lock.h>
#include <linux/buffer_head.h>
#include <linux/sched.h>
+#include <linux/crc-itu-t.h>
static inline int udf_match(int len1, const char *name1, int len2,
const char *name2)
memset(fibh->ebh->b_data, 0x00, padlen + offset);
}
- crc = udf_crc((uint8_t *)cfi + sizeof(tag),
- sizeof(struct fileIdentDesc) - sizeof(tag), 0);
+ crc = crc_itu_t(0, (uint8_t *)cfi + sizeof(tag),
+ sizeof(struct fileIdentDesc) - sizeof(tag));
if (fibh->sbh == fibh->ebh) {
- crc = udf_crc((uint8_t *)sfi->impUse,
+ crc = crc_itu_t(crc, (uint8_t *)sfi->impUse,
crclen + sizeof(tag) -
- sizeof(struct fileIdentDesc), crc);
+ sizeof(struct fileIdentDesc));
} else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) {
- crc = udf_crc(fibh->ebh->b_data +
+ crc = crc_itu_t(crc, fibh->ebh->b_data +
sizeof(struct fileIdentDesc) +
fibh->soffset,
crclen + sizeof(tag) -
- sizeof(struct fileIdentDesc),
- crc);
+ sizeof(struct fileIdentDesc));
} else {
- crc = udf_crc((uint8_t *)sfi->impUse,
- -fibh->soffset - sizeof(struct fileIdentDesc),
- crc);
- crc = udf_crc(fibh->ebh->b_data, fibh->eoffset, crc);
+ crc = crc_itu_t(crc, (uint8_t *)sfi->impUse,
+ -fibh->soffset - sizeof(struct fileIdentDesc));
+ crc = crc_itu_t(crc, fibh->ebh->b_data, fibh->eoffset);
}
cfi->descTag.descCRC = cpu_to_le16(crc);
struct fileIdentDesc *fi = NULL;
loff_t f_pos;
int block, flen;
- char fname[UDF_NAME_LEN];
+ char *fname = NULL;
char *nameptr;
uint8_t lfi;
uint16_t liu;
size = udf_ext0_offset(dir) + dir->i_size;
f_pos = udf_ext0_offset(dir);
+ fibh->sbh = fibh->ebh = NULL;
fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
- if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
- fibh->sbh = fibh->ebh = NULL;
- else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits,
- &epos, &eloc, &elen, &offset) ==
- (EXT_RECORDED_ALLOCATED >> 30)) {
+ if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
+ if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos,
+ &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30))
+ goto out_err;
block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
offset = 0;
fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block);
- if (!fibh->sbh) {
- brelse(epos.bh);
- return NULL;
- }
- } else {
- brelse(epos.bh);
- return NULL;
+ if (!fibh->sbh)
+ goto out_err;
}
+ fname = kmalloc(UDF_NAME_LEN, GFP_NOFS);
+ if (!fname)
+ goto out_err;
+
while (f_pos < size) {
fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc,
&elen, &offset);
- if (!fi) {
- if (fibh->sbh != fibh->ebh)
- brelse(fibh->ebh);
- brelse(fibh->sbh);
- brelse(epos.bh);
- return NULL;
- }
+ if (!fi)
+ goto out_err;
liu = le16_to_cpu(cfi->lengthOfImpUse);
lfi = cfi->lengthFileIdent;
flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi);
if (flen && udf_match(flen, fname, dentry->d_name.len,
- dentry->d_name.name)) {
- brelse(epos.bh);
- return fi;
- }
+ dentry->d_name.name))
+ goto out_ok;
}
+out_err:
+ fi = NULL;
if (fibh->sbh != fibh->ebh)
brelse(fibh->ebh);
brelse(fibh->sbh);
+out_ok:
brelse(epos.bh);
+ kfree(fname);
- return NULL;
+ return fi;
}
-/*
- * udf_lookup
- *
- * PURPOSE
- * Look-up the inode for a given name.
- *
- * DESCRIPTION
- * Required - lookup_dentry() will return -ENOTDIR if this routine is not
- * available for a directory. The filesystem is useless if this routine is
- * not available for at least the filesystem's root directory.
- *
- * This routine is passed an incomplete dentry - it must be completed by
- * calling d_add(dentry, inode). If the name does not exist, then the
- * specified inode must be set to null. An error should only be returned
- * when the lookup fails for a reason other than the name not existing.
- * Note that the directory inode semaphore is held during the call.
- *
- * Refer to lookup_dentry() in fs/namei.c
- * lookup_dentry() -> lookup() -> real_lookup() -> .
- *
- * PRE-CONDITIONS
- * dir Pointer to inode of parent directory.
- * dentry Pointer to dentry to complete.
- * nd Pointer to lookup nameidata
- *
- * POST-CONDITIONS
- * <return> Zero on success.
- *
- * HISTORY
- * July 1, 1997 - Andrew E. Mileski
- * Written, tested, and released.
- */
-
static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry,
struct nameidata *nd)
{
{
struct super_block *sb = dir->i_sb;
struct fileIdentDesc *fi = NULL;
- char name[UDF_NAME_LEN], fname[UDF_NAME_LEN];
+ char *name = NULL;
int namelen;
loff_t f_pos;
- int flen;
- char *nameptr;
loff_t size = udf_ext0_offset(dir) + dir->i_size;
int nfidlen;
uint8_t lfi;
struct extent_position epos = {};
struct udf_inode_info *dinfo;
+ fibh->sbh = fibh->ebh = NULL;
+ name = kmalloc(UDF_NAME_LEN, GFP_NOFS);
+ if (!name) {
+ *err = -ENOMEM;
+ goto out_err;
+ }
+
if (dentry) {
if (!dentry->d_name.len) {
*err = -EINVAL;
- return NULL;
+ goto out_err;
}
namelen = udf_put_filename(sb, dentry->d_name.name, name,
dentry->d_name.len);
if (!namelen) {
*err = -ENAMETOOLONG;
- return NULL;
+ goto out_err;
}
} else {
namelen = 0;
fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
dinfo = UDF_I(dir);
- if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
- fibh->sbh = fibh->ebh = NULL;
- else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits,
- &epos, &eloc, &elen, &offset) ==
- (EXT_RECORDED_ALLOCATED >> 30)) {
+ if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
+ if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos,
+ &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) {
+ block = udf_get_lb_pblock(dir->i_sb,
+ dinfo->i_location, 0);
+ fibh->soffset = fibh->eoffset = sb->s_blocksize;
+ goto add;
+ }
block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block);
if (!fibh->sbh) {
- brelse(epos.bh);
*err = -EIO;
- return NULL;
+ goto out_err;
}
block = dinfo->i_location.logicalBlockNum;
- } else {
- block = udf_get_lb_pblock(dir->i_sb, dinfo->i_location, 0);
- fibh->sbh = fibh->ebh = NULL;
- fibh->soffset = fibh->eoffset = sb->s_blocksize;
- goto add;
}
while (f_pos < size) {
&elen, &offset);
if (!fi) {
- if (fibh->sbh != fibh->ebh)
- brelse(fibh->ebh);
- brelse(fibh->sbh);
- brelse(epos.bh);
*err = -EIO;
- return NULL;
+ goto out_err;
}
liu = le16_to_cpu(cfi->lengthOfImpUse);
lfi = cfi->lengthFileIdent;
- if (fibh->sbh == fibh->ebh)
- nameptr = fi->fileIdent + liu;
- else {
- int poffset; /* Unpaded ending offset */
-
- poffset = fibh->soffset + sizeof(struct fileIdentDesc) +
- liu + lfi;
-
- if (poffset >= lfi)
- nameptr = (char *)(fibh->ebh->b_data +
- poffset - lfi);
- else {
- nameptr = fname;
- memcpy(nameptr, fi->fileIdent + liu,
- lfi - poffset);
- memcpy(nameptr + lfi - poffset,
- fibh->ebh->b_data, poffset);
- }
- }
-
if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
if (((sizeof(struct fileIdentDesc) +
liu + lfi + 3) & ~3) == nfidlen) {
- brelse(epos.bh);
cfi->descTag.tagSerialNum = cpu_to_le16(1);
cfi->fileVersionNum = cpu_to_le16(1);
cfi->fileCharacteristics = 0;
cfi->lengthOfImpUse = cpu_to_le16(0);
if (!udf_write_fi(dir, cfi, fi, fibh, NULL,
name))
- return fi;
+ goto out_ok;
else {
*err = -EIO;
- return NULL;
+ goto out_err;
}
}
}
-
- if (!lfi || !dentry)
- continue;
-
- flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi);
- if (flen && udf_match(flen, fname, dentry->d_name.len,
- dentry->d_name.name)) {
- if (fibh->sbh != fibh->ebh)
- brelse(fibh->ebh);
- brelse(fibh->sbh);
- brelse(epos.bh);
- *err = -EEXIST;
- return NULL;
- }
}
add:
fibh->sbh = fibh->ebh =
udf_expand_dir_adinicb(dir, &block, err);
if (!fibh->sbh)
- return NULL;
+ goto out_err;
epos.block = dinfo->i_location;
epos.offset = udf_file_entry_alloc_offset(dir);
/* Load extent udf_expand_dir_adinicb() has created */
dir->i_sb->s_blocksize_bits);
fibh->ebh = udf_bread(dir,
f_pos >> dir->i_sb->s_blocksize_bits, 1, err);
- if (!fibh->ebh) {
- brelse(epos.bh);
- brelse(fibh->sbh);
- return NULL;
- }
+ if (!fibh->ebh)
+ goto out_err;
if (!fibh->soffset) {
if (udf_next_aext(dir, &epos, &eloc, &elen, 1) ==
cfi->lengthFileIdent = namelen;
cfi->lengthOfImpUse = cpu_to_le16(0);
if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) {
- brelse(epos.bh);
dir->i_size += nfidlen;
if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
dinfo->i_lenAlloc += nfidlen;
mark_inode_dirty(dir);
- return fi;
+ goto out_ok;
} else {
- brelse(epos.bh);
- if (fibh->sbh != fibh->ebh)
- brelse(fibh->ebh);
- brelse(fibh->sbh);
*err = -EIO;
- return NULL;
+ goto out_err;
}
+
+out_err:
+ fi = NULL;
+ if (fibh->sbh != fibh->ebh)
+ brelse(fibh->ebh);
+ brelse(fibh->sbh);
+out_ok:
+ brelse(epos.bh);
+ kfree(name);
+ return fi;
}
static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi,
char *ea;
int err;
int block;
- char name[UDF_NAME_LEN];
+ char *name = NULL;
int namelen;
struct buffer_head *bh;
struct udf_inode_info *iinfo;
if (!inode)
goto out;
+ name = kmalloc(UDF_NAME_LEN, GFP_NOFS);
+ if (!name) {
+ err = -ENOMEM;
+ goto out_no_entry;
+ }
+
iinfo = UDF_I(inode);
inode->i_mode = S_IFLNK | S_IRWXUGO;
inode->i_data.a_ops = &udf_symlink_aops;
if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
kernel_lb_addr eloc;
- uint32_t elen;
+ uint32_t bsize;
block = udf_new_block(inode->i_sb, inode,
iinfo->i_location.partitionReferenceNum,
eloc.logicalBlockNum = block;
eloc.partitionReferenceNum =
iinfo->i_location.partitionReferenceNum;
- elen = inode->i_sb->s_blocksize;
- iinfo->i_lenExtents = elen;
- udf_add_aext(inode, &epos, eloc, elen, 0);
+ bsize = inode->i_sb->s_blocksize;
+ iinfo->i_lenExtents = bsize;
+ udf_add_aext(inode, &epos, eloc, bsize, 0);
brelse(epos.bh);
block = udf_get_pblock(inode->i_sb, block,
err = 0;
out:
+ kfree(name);
unlock_kernel();
return err;
projects / linux-2.6-omap-h63xx.git / blobdiff