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authorStefan Agner <stefan.agner@toradex.com>2016-07-13 17:14:37 -0700
committerTom Rini <trini@konsulko.com>2016-07-22 14:46:20 -0400
commit14fb5b252ac21c81e24fa734c3f66e9d6c3a0932 (patch)
treec77092d5e57b6ccb2b7f05acb563b57abd96bae9 /tools
parent28f0014bde9993354223ed250df22ba97d381565 (diff)
tools/env: complete environment device config early
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
Diffstat (limited to 'tools')
-rw-r--r--tools/env/fw_env.c110
1 files changed, 60 insertions, 50 deletions
diff --git a/tools/env/fw_env.c b/tools/env/fw_env.c
index 692abda7318..06d6865f3b3 100644
--- a/tools/env/fw_env.c
+++ b/tools/env/fw_env.c
@@ -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);