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tools/env: complete environment device config early

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Currently flash_read completes a crucial part of the environment
device configuration, the device type (mtd_type). This is rather
confusing as flash_io calls flash_read conditionally, and one might
think flash_write, which also makes use of mtd_type, gets called
before flash_read. But since flash_io is always called with O_RDONLY
first, this is not actually the case in reality.

However, it is much cleaner to complete and verify the config early
in parse_config. This also prepares the code for further extension.

Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
Reviewed-by: Andreas Fenkart
This commit is contained in:
Stefan Agner 2016-07-13 17:14:37 -07:00 committed by Tom Rini
parent 28f0014bde
commit 14fb5b252a
1 changed files with 60 additions and 50 deletions
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110
tools/env/fw_env.c vendored
View file

@ -1021,41 +1021,10 @@ static int flash_write (int fd_current, int fd_target, int dev_target)
static int flash_read (int fd)
{
struct mtd_info_user mtdinfo;
struct stat st;
int rc;
rc = fstat(fd, &st);
if (rc < 0) {
fprintf(stderr, "Cannot stat the file %s\n",
DEVNAME(dev_current));
return -1;
}
if (S_ISCHR(st.st_mode)) {
rc = ioctl(fd, MEMGETINFO, &mtdinfo);
if (rc < 0) {
fprintf(stderr, "Cannot get MTD information for %s\n",
DEVNAME(dev_current));
return -1;
}
if (mtdinfo.type != MTD_NORFLASH &&
mtdinfo.type != MTD_NANDFLASH &&
mtdinfo.type != MTD_DATAFLASH &&
mtdinfo.type != MTD_UBIVOLUME) {
fprintf (stderr, "Unsupported flash type %u on %s\n",
mtdinfo.type, DEVNAME(dev_current));
return -1;
}
} else {
memset(&mtdinfo, 0, sizeof(mtdinfo));
mtdinfo.type = MTD_ABSENT;
}
DEVTYPE(dev_current) = mtdinfo.type;
rc = flash_read_buf(dev_current, fd, environment.image, CUR_ENVSIZE,
DEVOFFSET (dev_current), mtdinfo.type);
DEVOFFSET(dev_current), DEVTYPE(dev_current));
if (rc != CUR_ENVSIZE)
return -1;
@ -1328,10 +1297,55 @@ int fw_env_open(struct env_opts *opts)
return 0;
}
static int check_device_config(int dev)
{
struct stat st;
int fd, rc = 0;
fd = open(DEVNAME(dev), O_RDONLY);
if (fd < 0) {
fprintf(stderr,
"Cannot open %s: %s\n",
DEVNAME(dev), strerror(errno));
return -1;
}
rc = fstat(fd, &st);
if (rc < 0) {
fprintf(stderr, "Cannot stat the file %s\n",
DEVNAME(dev));
goto err;
}
if (S_ISCHR(st.st_mode)) {
struct mtd_info_user mtdinfo;
rc = ioctl(fd, MEMGETINFO, &mtdinfo);
if (rc < 0) {
fprintf(stderr, "Cannot get MTD information for %s\n",
DEVNAME(dev));
goto err;
}
if (mtdinfo.type != MTD_NORFLASH &&
mtdinfo.type != MTD_NANDFLASH &&
mtdinfo.type != MTD_DATAFLASH &&
mtdinfo.type != MTD_UBIVOLUME) {
fprintf(stderr, "Unsupported flash type %u on %s\n",
mtdinfo.type, DEVNAME(dev));
goto err;
}
DEVTYPE(dev) = mtdinfo.type;
} else {
DEVTYPE(dev) = MTD_ABSENT;
}
err:
close(fd);
return rc;
}
static int parse_config(struct env_opts *opts)
{
struct stat st;
int rc;
if (!opts)
opts = &default_opts;
@ -1375,25 +1389,21 @@ static int parse_config(struct env_opts *opts)
HaveRedundEnv = 1;
#endif
#endif
if (stat (DEVNAME (0), &st)) {
fprintf (stderr,
"Cannot access MTD device %s: %s\n",
DEVNAME (0), strerror (errno));
return -1;
}
rc = check_device_config(0);
if (rc < 0)
return rc;
if (HaveRedundEnv && stat (DEVNAME (1), &st)) {
fprintf (stderr,
"Cannot access MTD device %s: %s\n",
DEVNAME (1), strerror (errno));
return -1;
}
if (HaveRedundEnv) {
rc = check_device_config(1);
if (rc < 0)
return rc;
if (HaveRedundEnv && ENVSIZE(0) != ENVSIZE(1)) {
ENVSIZE(0) = ENVSIZE(1) = min(ENVSIZE(0), ENVSIZE(1));
fprintf(stderr,
"Redundant environments have inequal size, set to 0x%08lx\n",
ENVSIZE(1));
if (ENVSIZE(0) != ENVSIZE(1)) {
ENVSIZE(0) = ENVSIZE(1) = min(ENVSIZE(0), ENVSIZE(1));
fprintf(stderr,
"Redundant environments have inequal size, set to 0x%08lx\n",
ENVSIZE(1));
}
}
usable_envsize = CUR_ENVSIZE - sizeof(uint32_t);