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New API calls iso_write_opts_set_record_md5(), iso_read_opts_set_no_md5()

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This commit is contained in:
Thomas Schmitt 2009-08-10 21:23:30 +02:00
parent b5f4a66c59
commit 429b4cd21c
6 changed files with 134 additions and 46 deletions
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24
libisofs/ecma119.c
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@ -1038,9 +1038,8 @@ int ecma119_image_new(IsoImage *src, IsoWriteOpts *opts, Ecma119Image **img)
#ifdef Libisofs_with_checksumS
/* >>> need an IsoWriteOpts component to control this */;
target->md5_checksums = 1;
target->md5_file_checksums = opts->md5_file_checksums;
target->md5_session_checksum = opts->md5_session_checksum;
target->checksum_idx_counter = 0;
target->checksum_ctx = NULL;
target->checksum_counter = 0;
@ -1074,7 +1073,7 @@ int ecma119_image_new(IsoImage *src, IsoWriteOpts *opts, Ecma119Image **img)
#ifdef Libisofs_with_checksumS
if (target->md5_checksums) {
if (target->md5_file_checksums || target->md5_session_checksum) {
nwriters++;
ret = checksum_prepare_image(src, 0);
if (ret < 0)
@ -1154,7 +1153,7 @@ int ecma119_image_new(IsoImage *src, IsoWriteOpts *opts, Ecma119Image **img)
/* ??? Is it safe to add a writer after the content writer ? */
if (target->md5_checksums) {
if (target->md5_file_checksums || target->md5_session_checksum) {
ret = checksum_writer_create(target);
if (ret < 0)
goto target_cleanup;
@ -1274,10 +1273,12 @@ int ecma119_image_new(IsoImage *src, IsoWriteOpts *opts, Ecma119Image **img)
/* 4. Create and start writing thread */
#ifdef Libisofs_with_checksumS
if (target->md5_session_checksum) {
/* After any fake writes are done: Initialize image checksum context */
ret = libisofs_md5(&(target->checksum_ctx), NULL, 0, NULL, 1);
if (ret < 0)
return ret;
}
#endif /* Libisofs_with_checksumS */
/* ensure the thread is created joinable */
@ -1717,6 +1718,19 @@ int iso_write_opts_set_sort_files(IsoWriteOpts *opts, int sort)
return ISO_SUCCESS;
}
int iso_write_opts_set_record_md5(IsoWriteOpts *opts, int session, int files)
{
#ifdef Libisofs_with_checksumS
opts->md5_session_checksum = !!session;
opts->md5_file_checksums = !!files;
#endif /* Libisofs_with_checksumS */
return ISO_SUCCESS;
}
int iso_write_opts_set_replace_mode(IsoWriteOpts *opts, int dir_mode,
int file_mode, int uid, int gid)
{

24
libisofs/ecma119.h
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@ -147,6 +147,27 @@ struct iso_write_opts {
*/
unsigned int dir_rec_mtime :1;
#ifdef Libisofs_with_checksumS
/**
* Compute MD5 checksum for the whole session and record it as index 0 of
* the checksum blocks after the data area of the session. The layout and
* position of these blocks will be recorded in xattr "isofs.ca" of the
* root node. See see also API call iso_image_get_session_md5().
*/
unsigned int md5_session_checksum :1;
/**
* Compute MD5 checksums for IsoFile objects and write them to blocks
* after the data area of the session. The layout and position of these
* blocks will be recorded in xattr "isofs.ca" of the root node.
* The indice of the MD5 sums will be recorded with the IsoFile directory
* entries as xattr "isofs.cx". See also API call iso_file_get_md5().
*/
unsigned int md5_file_checksums :1;
#endif /* Libisofs_with_checksumS */
/** If files should be sorted based on their weight. */
unsigned int sort_files :1;
@ -314,7 +335,8 @@ struct ecma119_image
#ifdef Libisofs_with_checksumS
unsigned int md5_checksums :1;
unsigned int md5_session_checksum :1;
unsigned int md5_file_checksums :1;
#endif /* Libisofs_with_checksumS */

2
libisofs/filesrc.c
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@ -117,7 +117,7 @@ int iso_file_src_create(Ecma119Image *img, IsoFile *file, IsoFileSrc **src)
#ifdef Libisofs_with_checksumS
if(img->md5_checksums) {
if(img->md5_file_checksums) {
img->checksum_idx_counter++;
if (img->checksum_idx_counter < 0x80000000) {
fsrc->checksum_index= img->checksum_idx_counter;

24
libisofs/fs_image.c
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@ -62,6 +62,7 @@ struct iso_read_opts
unsigned int nojoliet : 1; /*< Do not read Joliet extensions */
unsigned int noiso1999 : 1; /*< Do not read ISO 9660:1999 enhanced tree */
unsigned int noaaip : 1; /* Do not read AAIP extension for xattr and ACL */
unsigned int nomd5 : 1; /* Do not read MD5 array */
/**
* Hand out new inode numbers and overwrite eventually read PX inode
@ -249,6 +250,11 @@ typedef struct
*/
int aaip_load;
/** Whether the MD5 array shall be read if available.
* 1 = yes , 0 = no
*/
int md5_load;
/** Whether AAIP is present. Version major.minor = major * 100 + minor
* Value -1 means that no AAIP ER was detected yet.
*/
@ -2311,6 +2317,7 @@ int iso_image_filesystem_new(IsoDataSource *src, struct iso_read_opts *opts,
data->dir_mode = opts->dir_mode & ~S_IFMT;
data->msgid = msgid;
data->aaip_load = !opts->noaaip;
data->md5_load = !opts->nomd5;
data->aaip_version = -1;
data->make_new_ino = opts->make_new_ino;
data->inode_counter = 0;
@ -3149,10 +3156,8 @@ int iso_image_import(IsoImage *image, IsoDataSource *src,
#ifdef Libisofs_with_checksumS
/* Read checksum buffer */
/* >>> needs to be controlled by iso_read_opts */;
if (data->md5_load) {
/* Read checksum array */
ret = iso_root_get_isofsca((IsoNode *) image->root,
&(image->checksum_start_lba),
&(image->checksum_end_lba),
@ -3177,6 +3182,7 @@ int iso_image_import(IsoImage *image, IsoDataSource *src,
goto import_revert;
}
}
}
#endif /* Libisofs_with_checksumS */
@ -3291,6 +3297,7 @@ int iso_read_opts_new(IsoReadOpts **opts, int profile)
ropts->file_mode = 0444;
ropts->dir_mode = 0555;
ropts->noaaip= 1;
ropts->nomd5= 1;
*opts = ropts;
return ISO_SUCCESS;
@ -3351,6 +3358,15 @@ int iso_read_opts_set_no_aaip(IsoReadOpts *opts, int noaaip)
return ISO_SUCCESS;
}
int iso_read_opts_set_no_md5(IsoReadOpts *opts, int no_md5)
{
if (opts == NULL) {
return ISO_NULL_POINTER;
}
opts->nomd5 = no_md5 ? 1 : 0;
return ISO_SUCCESS;
}
int iso_read_opts_set_new_inos(IsoReadOpts *opts, int new_inos)
{

42
libisofs/libisofs.h
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@ -1415,6 +1415,22 @@ int iso_write_opts_set_dir_rec_mtime(IsoWriteOpts *opts, int allow);
*/
int iso_write_opts_set_sort_files(IsoWriteOpts *opts, int sort);
/**
* Whether to compute and record MD5 checksums for the whole session and/or
* for each single IsoFile object. The checksums represent the data as they
* were written into the image output stream, not necessarily as they were
* on hard disk at any point of time.
* See also calls iso_image_get_session_md5() and iso_file_get_md5().
* @param opts
* The option set to be manipulated.
* @param session
* If not 0: compute session checksum
* @param files
* If not 0: compute a checksum for each single IsoFile object.
* @since 0.6.22
*/
int iso_write_opts_set_record_md5(IsoWriteOpts *opts, int session, int files);
/**
* Whether to set default values for files and directory permissions, gid and
* uid. All these take one of three values: 0, 1 or 2.
@ -1755,6 +1771,22 @@ int iso_read_opts_set_no_iso1999(IsoReadOpts *opts, int noiso1999);
*/
int iso_read_opts_set_no_aaip(IsoReadOpts *opts, int noaaip);
/**
* Control reading of an array of MD5 checksums which is eventually stored
* at the end of a session. See also iso_write_opts_set_record_md5().
* Important: Loading of the MD5 array will only work if AAIP is enabled
* because its position and layout is recorded in xattr "isofs.ca".
*
* @param no_md5
* 1 = Do not read MD5 checksum array
* 0 = Read Md% array if available
* All other values are reserved.
*
* @since 0.6.22
*/
int iso_read_opts_set_no_md5(IsoReadOpts *opts, int no_md5);
/**
* Control discarding of eventual inode numbers from existing images.
* Such numbers may come from RRIP 1.12 entries PX. If not discarded they
@ -4963,7 +4995,7 @@ int iso_gzip_get_refcounts(off_t *gzip_count, off_t *gunzip_count, int flag);
/**
* Eventually obtain the recorded MD5 checksum of the session which was
* loaded as ISO image. Such a checksum may be stored together with others
* in a contiguous array at the end of the ISO image. The session checksum
* in a contiguous array at the end of the session. The session checksum
* covers the data blocks from address start_lba to address end_lba - 1.
* It does not cover the recorded array of md5 checksums.
* Layout, size, and position of the checksum array is recorded in the xattr
@ -4972,7 +5004,7 @@ int iso_gzip_get_refcounts(off_t *gzip_count, off_t *gunzip_count, int flag);
* The image to inquire
* @param start_lba
* Eventually returns the first block address covered by md5
* @param start_lba
* @param end_lba
* Eventually returns the first block address not covered by md5 any more
* @param md5
* Eventually returns 16 byte of MD5 checksum
@ -4989,8 +5021,8 @@ int iso_image_get_session_md5(IsoImage *image, uint32_t *start_lba,
/**
* Eventually obtain the recorded MD5 checksum of a data file from the loaded
* ISO image. Such a checksum may be stored with others in a contiguous
* array at the end of the ISO image. The data file eventually has an xattr
* "isofs.cx" which gives the index in that array.
* array at the end of the loaded session. The data file eventually has an
* xattr "isofs.cx" which gives the index in that array.
* @param image
* The image from which file stems.
* @param file
@ -5516,8 +5548,8 @@ struct burn_source {
image.
ENABLE ONLY FOR DEVELOPMENT TESTS !
#define Libisofs_with_checksumS yes
*/
#define Libisofs_with_checksumS yes
#endif /*LIBISO_LIBISOFS_H_*/

4
libisofs/md5.c
View File

@ -457,11 +457,15 @@ int checksum_writer_write_data(IsoImageWriter *writer)
iso_msg_debug(t->image->id, "Writing Checksums...");
/* Write image checksum to index 0 */
if (t->checksum_ctx != NULL) {
/* >>> rather fork a result than killing t->checksum_ctx */;
res = libisofs_md5(&(t->checksum_ctx), NULL, 0, t->image_md5,
2 | (1 << 15));
if (res > 0)
memcpy(t->checksum_buffer + 0, t->image_md5, 16);
}
size = (t->checksum_idx_counter + 2) / 128 + 1;