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mkimage: Put FIT loading in function and tidy error handling

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The fit_handle_file() function is quite long - split out the part that
loads and checks a FIT into its own function. We will use this
function for storing public keys into a destination FDT file.

The error handling is currently a bit repetitive - tidy it.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2013-05-08 08:05:57 +00:00 committed by Tom Rini
parent 35e7b0f179
commit aa6d6db4d4
1 changed files with 57 additions and 39 deletions
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96
tools/fit_image.c
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@ -47,6 +47,48 @@ static int fit_check_image_types (uint8_t type)
return EXIT_FAILURE;
}
int mmap_fdt(struct mkimage_params *params, const char *fname, void **blobp,
struct stat *sbuf)
{
void *ptr;
int fd;
/* Load FIT blob into memory (we need to write hashes/signatures) */
fd = open(fname, O_RDWR | O_BINARY);
if (fd < 0) {
fprintf(stderr, "%s: Can't open %s: %s\n",
params->cmdname, fname, strerror(errno));
unlink(fname);
return -1;
}
if (fstat(fd, sbuf) < 0) {
fprintf(stderr, "%s: Can't stat %s: %s\n",
params->cmdname, fname, strerror(errno));
unlink(fname);
return -1;
}
ptr = mmap(0, sbuf->st_size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
if (ptr == MAP_FAILED) {
fprintf(stderr, "%s: Can't read %s: %s\n",
params->cmdname, fname, strerror(errno));
unlink(fname);
return -1;
}
/* check if ptr has a valid blob */
if (fdt_check_header(ptr)) {
fprintf(stderr, "%s: Invalid FIT blob\n", params->cmdname);
unlink(fname);
return -1;
}
*blobp = ptr;
return fd;
}
/**
* fit_handle_file - main FIT file processing function
*
@ -65,7 +107,7 @@ static int fit_handle_file (struct mkimage_params *params)
char cmd[MKIMAGE_MAX_DTC_CMDLINE_LEN];
int tfd;
struct stat sbuf;
unsigned char *ptr;
void *ptr;
/* Flattened Image Tree (FIT) format handling */
debug ("FIT format handling\n");
@ -87,57 +129,25 @@ static int fit_handle_file (struct mkimage_params *params)
if (system (cmd) == -1) {
fprintf (stderr, "%s: system(%s) failed: %s\n",
params->cmdname, cmd, strerror(errno));
unlink (tmpfile);
return (EXIT_FAILURE);
goto err_system;
}
/* load FIT blob into memory */
tfd = open (tmpfile, O_RDWR|O_BINARY);
if (tfd < 0) {
fprintf (stderr, "%s: Can't open %s: %s\n",
params->cmdname, tmpfile, strerror(errno));
unlink (tmpfile);
return (EXIT_FAILURE);
}
if (fstat (tfd, &sbuf) < 0) {
fprintf (stderr, "%s: Can't stat %s: %s\n",
params->cmdname, tmpfile, strerror(errno));
unlink (tmpfile);
return (EXIT_FAILURE);
}
ptr = mmap (0, sbuf.st_size, PROT_READ|PROT_WRITE, MAP_SHARED,
tfd, 0);
if (ptr == MAP_FAILED) {
fprintf (stderr, "%s: Can't read %s: %s\n",
params->cmdname, tmpfile, strerror(errno));
unlink (tmpfile);
return (EXIT_FAILURE);
}
/* check if ptr has a valid blob */
if (fdt_check_header (ptr)) {
fprintf (stderr, "%s: Invalid FIT blob\n", params->cmdname);
unlink (tmpfile);
return (EXIT_FAILURE);
}
tfd = mmap_fdt(params, tmpfile, &ptr, &sbuf);
if (tfd < 0)
goto err_mmap;
/* set hashes for images in the blob */
if (fit_add_verification_data(ptr)) {
fprintf (stderr, "%s Can't add hashes to FIT blob",
params->cmdname);
unlink (tmpfile);
return (EXIT_FAILURE);
goto err_add_hashes;
}
/* add a timestamp at offset 0 i.e., root */
if (fit_set_timestamp (ptr, 0, sbuf.st_mtime)) {
fprintf (stderr, "%s: Can't add image timestamp\n",
params->cmdname);
unlink (tmpfile);
return (EXIT_FAILURE);
goto err_add_timestamp;
}
debug ("Added timestamp successfully\n");
@ -153,6 +163,14 @@ static int fit_handle_file (struct mkimage_params *params)
return (EXIT_FAILURE);
}
return (EXIT_SUCCESS);
err_add_timestamp:
err_add_hashes:
munmap(ptr, sbuf.st_size);
err_mmap:
err_system:
unlink(tmpfile);
return -1;
}
static int fit_check_params (struct mkimage_params *params)