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Move size, ino, dev cache from IsoFileSrc to IsoStream.

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That is a better decission, as it reduces the number of stat() call 
needed, and anyway some Streams will need the size.
This commit is contained in:
Vreixo Formoso 2007-12-18 20:46:28 +01:00
parent 5b93cb4cdc
commit 39bde82ff6
5 changed files with 85 additions and 74 deletions
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19
src/ecma119_tree.c
View File

@ -14,6 +14,7 @@
#include "filesrc.h"
#include "messages.h"
#include "image.h"
#include "stream.h"
#include <stdlib.h>
#include <string.h>
@ -111,6 +112,15 @@ int create_file(Ecma119Image *img, IsoFile *iso, Ecma119Node **node)
{
int ret;
IsoFileSrc *src;
off_t size;
size = iso->stream->get_size(iso->stream);
if (size > (off_t)0xffffffff) {
iso_msg_note(img->image, LIBISO_FILE_IGNORED,
"File \"%s\" can't be added to image because is "
"greater than 4GB", iso->node.name);
return 0;
}
ret = iso_file_src_create(img, iso, &src);
if (ret < 0) {
@ -190,13 +200,6 @@ int create_tree(Ecma119Image *image, IsoNode *iso, Ecma119Node **tree,
switch(iso->type) {
case LIBISO_FILE:
ret = create_file(image, (IsoFile*)iso, &node);
if (ret == ISO_FILE_TOO_BIG) {
iso_msg_note(image->image, LIBISO_FILE_IGNORED,
"File \"%s\" can't be added to image because is "
"greater than 4GB", iso->name);
free(iso_name);
return 0;
}
break;
case LIBISO_SYMLINK:
//TODO only supported with RR
@ -247,7 +250,7 @@ int create_tree(Ecma119Image *image, IsoNode *iso, Ecma119Node **tree,
/* should never happen */
return ISO_ERROR;
}
if (ret < 0) {
if (ret <= 0) {
free(iso_name);
return ret;
}

47
src/filesrc.c
View File

@ -20,23 +20,34 @@ static
int comp_iso_file_src(const void *n1, const void *n2)
{
const IsoFileSrc *f1, *f2;
int res;
unsigned int fs_id1, fs_id2;
dev_t dev_id1, dev_id2;
ino_t ino_id1, ino_id2;
f1 = (const IsoFileSrc *)n1;
f2 = (const IsoFileSrc *)n2;
if (f1->fs_id < f2->fs_id) {
res = f1->stream->get_id(f1->stream, &fs_id1, &dev_id1, &ino_id1);
res = f2->stream->get_id(f2->stream, &fs_id2, &dev_id2, &ino_id2);
//TODO take care about res <= 0
if (fs_id1 < fs_id2) {
return -1;
} else if (f1->fs_id > f2->fs_id) {
} else if (fs_id1 > fs_id2) {
return 1;
} else {
/* files belong to the same fs */
if (f1->dev_id > f2->dev_id) {
if (dev_id1 > dev_id2) {
return -1;
} else if (f1->dev_id < f2->dev_id) {
} else if (dev_id1 < dev_id2) {
return 1;
} else {
/* files belong to same device in same fs */
return (f1->ino_id < f2->ino_id) ? -1 :
(f1->ino_id > f2->ino_id) ? 1 : 0;
return (ino_id1 < ino_id2) ? -1 :
(ino_id1 > ino_id2) ? 1 : 0;
}
}
}
@ -49,7 +60,6 @@ int iso_file_src_create(Ecma119Image *img, IsoFile *file, IsoFileSrc **src)
unsigned int fs_id;
dev_t dev_id;
ino_t ino_id;
off_t size;
if (img == NULL || file == NULL || src == NULL) {
return ISO_NULL_POINTER;
@ -61,33 +71,21 @@ int iso_file_src_create(Ecma119Image *img, IsoFile *file, IsoFileSrc **src)
return res;
} else if (res == 0) {
// TODO this corresponds to Stream that cannot provide a valid id
// Not implemented for now
// Not implemented for now, but that shouldn't be here, the get_id
// above is not needed at all, the comparison function should take
// care of it
return ISO_ERROR;
} else {
IsoFileSrc **inserted;
size = stream->get_size(stream);
if (size == (off_t)-1) {
return ISO_FILE_ERROR;
}
/* Files > 4GB not supported yet, they need ISO level 3 */
if (size > (off_t)0xffffffff) {
return ISO_FILE_TOO_BIG;
}
fsrc = malloc(sizeof(IsoFileSrc));
if (fsrc == NULL) {
return ISO_MEM_ERROR;
}
/* fill key and other atts */
fsrc->fs_id = fs_id;
fsrc->dev_id = dev_id;
fsrc->ino_id = ino_id;
fsrc->prev_img = file->msblock ? 1 : 0;
fsrc->block = file->msblock;
fsrc->size = size;
fsrc->sort_weight = file->sort_weight;
fsrc->stream = file->stream;
@ -119,3 +117,8 @@ void iso_file_src_free(Ecma119Image *img)
tdestroy(img->file_srcs, free_node);
}
}
off_t iso_file_src_get_size(IsoFileSrc *file)
{
return file->stream->get_size(file->stream);
}

12
src/filesrc.h
View File

@ -15,14 +15,7 @@
#include <stdint.h>
struct Iso_File_Src {
/* key */
unsigned int fs_id;
dev_t dev_id;
ino_t ino_id;
unsigned int prev_img:1; /**< if the file comes from a previous image */
off_t size; /**< size of this file */
uint32_t block; /**< Block where this file will be written on image */
int sort_weight;
IsoStream *stream;
@ -52,6 +45,11 @@ int iso_file_src_create(Ecma119Image *img, IsoFile *file, IsoFileSrc **src);
*/
void iso_file_src_free(Ecma119Image *img);
/**
* Get the size of the file this IsoFileSrc represents
*/
off_t iso_file_src_get_size(IsoFileSrc *file);
// TODO not implemented
int iso_file_src_open(IsoFileSrc *file);

74
src/stream.c
View File

@ -16,7 +16,12 @@
typedef struct
{
IsoFileSource *src;
} _FSrcStream;
/* key for file identification inside filesystem */
dev_t dev_id;
ino_t ino_id;
off_t size; /**< size of this file */
} FSrcStreamData;
static
int fsrc_open(IsoStream *stream)
@ -25,7 +30,7 @@ int fsrc_open(IsoStream *stream)
if (stream == NULL) {
return ISO_NULL_POINTER;
}
src = (IsoFileSource*)stream->data;
src = ((FSrcStreamData*)stream->data)->src;
return src->open(src);
}
@ -36,25 +41,17 @@ int fsrc_close(IsoStream *stream)
if (stream == NULL) {
return ISO_NULL_POINTER;
}
src = (IsoFileSource*)stream->data;
src = ((FSrcStreamData*)stream->data)->src;
return src->close(src);
}
static
off_t fsrc_get_size(IsoStream *stream)
{
struct stat info;
IsoFileSource *src;
if (stream == NULL) {
return ISO_NULL_POINTER;
}
src = (IsoFileSource*)stream->data;
FSrcStreamData *data;
data = (FSrcStreamData*)stream->data;
if (src->lstat(src, &info) < 0) {
return (off_t) -1;
}
return info.st_size;
return data->size;
}
static
@ -64,7 +61,7 @@ int fsrc_read(IsoStream *stream, void *buf, size_t count)
if (stream == NULL) {
return ISO_NULL_POINTER;
}
src = (IsoFileSource*)stream->data;
src = ((FSrcStreamData*)stream->data)->src;
return src->read(src, buf, count);
}
@ -73,17 +70,18 @@ int fsrc_is_repeatable(IsoStream *stream)
{
int ret;
struct stat info;
IsoFileSource *src;
FSrcStreamData *data;
if (stream == NULL) {
return ISO_NULL_POINTER;
}
src = (IsoFileSource*)stream->data;
data = (FSrcStreamData*)stream->data;
ret = src->stat(src, &info);
/* mode is not cached, this function is only useful for filters */
ret = data->src->stat(data->src, &info);
if (ret < 0) {
return ret;
}
if (info.st_mode & (S_IFREG | S_IFBLK)) {
if (S_ISREG(info.st_mode) || S_ISBLK(info.st_mode)) {
return 1;
} else {
return 0;
@ -94,38 +92,33 @@ static
int fsrc_get_id(IsoStream *stream, unsigned int *fs_id, dev_t *dev_id,
ino_t *ino_id)
{
int result;
struct stat info;
IsoFileSource *src;
FSrcStreamData *data;
IsoFilesystem *fs;
if (stream == NULL || fs_id == NULL || dev_id == NULL || ino_id == NULL) {
return ISO_NULL_POINTER;
}
src = (IsoFileSource*)stream->data;
data = (FSrcStreamData*)stream->data;
fs = src->get_filesystem(src);
fs = data->src->get_filesystem(data->src);
*fs_id = fs->get_id(fs);
if (fs_id == 0) {
return 0;
}
result = src->stat(src, &info);
if (result < 0) {
return result;
}
*dev_id = info.st_dev;
*ino_id = info.st_ino;
*dev_id = data->dev_id;
*ino_id = data->ino_id;
return ISO_SUCCESS;
}
static
void fsrc_free(IsoStream *stream)
{
IsoFileSource *src;
src = (IsoFileSource*)stream->data;
iso_file_source_unref(src);
FSrcStreamData *data;
data = (FSrcStreamData*)stream->data;
iso_file_source_unref(data->src);
free(data);
}
int iso_file_source_stream_new(IsoFileSource *src, IsoStream **stream)
@ -133,6 +126,8 @@ int iso_file_source_stream_new(IsoFileSource *src, IsoStream **stream)
int r;
struct stat info;
IsoStream *str;
FSrcStreamData *data;
if (src == NULL || stream == NULL) {
return ISO_NULL_POINTER;
}
@ -149,9 +144,20 @@ int iso_file_source_stream_new(IsoFileSource *src, IsoStream **stream)
if (str == NULL) {
return ISO_MEM_ERROR;
}
data = malloc(sizeof(FSrcStreamData));
if (str == NULL) {
free(str);
return ISO_MEM_ERROR;
}
/* take the ref to IsoFileSource */
data->src = src;
data->dev_id = info.st_dev;
data->ino_id = info.st_ino;
data->size = info.st_size;
str->refcount = 1;
str->data = src;
str->data = data;
str->open = fsrc_open;
str->close = fsrc_close;
str->get_size = fsrc_get_size;

7
src/stream.h
View File

@ -25,6 +25,8 @@ struct Iso_Stream
/**
* Opens the stream.
*
* TODO it would be great to return a different success code if the
* underlying source size has changed.
* @return
* 1 on success, < 0 on error
*/
@ -37,9 +39,8 @@ struct Iso_Stream
int (*close)(IsoStream *stream);
/**
* Get the size (in bytes) of the stream.
* @return
* The size, or -1 on error
* Get the size (in bytes) of the stream. This function should always
* return the same size, even if the underlying source size changes.
*/
off_t (*get_size)(IsoStream *stream);