| Message ID | 20240328222951.11431-1-semen.protsenko@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | [1/2] part: Check all partitions in part_get_info_by_name() | expand |
On 3/28/24 23:29, Sam Protsenko wrote: > In part_get_info_by_name() the inability to get some partition info > shouldn't be a reason for dropping out of the loop. That might happen > e.g. if the partition is hidden or unused. An example of such case are > Samsung devices, where they use the "unused" GUID type > (00000000-0000-0000-0000-000000000000) to indicate that the partition > should be hidden from the OS. Such partitions might not be seen in > "part list" output, which creates "gaps" in numbering in between of the > visible partitions: > > Part Start LBA End LBA Name > 1 0x00000400 0x0000a3ff "efs" > 5 0x00026420 0x00026c1f "dtbo" > 12 0x0003f390 0x0074738f "super" > > In that case, the loop in part_get_info_by_name() would break after > partition #1, so any attempt to obtain "dtbo" or "super" partition will > fail. Fix that by continuing to iterate over the remaining partitions to > make sure none of the visible ones is missed. That makes "part" command > (e.g. "part start", "part size") able to work with such tables. > > Fixes: 87b8530fe244 ("disk: part: implement generic function part_get_info_by_name()") > Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org> Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de> > --- > disk/part.c | 7 +++++-- > 1 file changed, 5 insertions(+), 2 deletions(-) > > diff --git a/disk/part.c b/disk/part.c > index 36b88205eca7..08c9331e059c 100644 > --- a/disk/part.c > +++ b/disk/part.c > @@ -717,8 +717,11 @@ int part_get_info_by_name(struct blk_desc *desc, const char *name, > for (i = 1; i < part_drv->max_entries; i++) { > ret = part_drv->get_info(desc, i, info); > if (ret != 0) { > - /* no more entries in table */ > - break; > + /* > + * Partition with this index can't be obtained, but > + * further partitions might be, so keep checking. > + */ > + continue; > } > if (strcmp(name, (const char *)info->name) == 0) { > /* matched */
On Thu, Mar 28, 2024 at 05:29:50PM -0500, Sam Protsenko wrote: > In part_get_info_by_name() the inability to get some partition info > shouldn't be a reason for dropping out of the loop. That might happen > e.g. if the partition is hidden or unused. An example of such case are > Samsung devices, where they use the "unused" GUID type > (00000000-0000-0000-0000-000000000000) to indicate that the partition > should be hidden from the OS. Such partitions might not be seen in > "part list" output, which creates "gaps" in numbering in between of the > visible partitions: > > Part Start LBA End LBA Name > 1 0x00000400 0x0000a3ff "efs" > 5 0x00026420 0x00026c1f "dtbo" > 12 0x0003f390 0x0074738f "super" > > In that case, the loop in part_get_info_by_name() would break after > partition #1, so any attempt to obtain "dtbo" or "super" partition will > fail. Fix that by continuing to iterate over the remaining partitions to > make sure none of the visible ones is missed. That makes "part" command > (e.g. "part start", "part size") able to work with such tables. > > Fixes: 87b8530fe244 ("disk: part: implement generic function part_get_info_by_name()") > Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org> > Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Applied to u-boot/master, thanks!
diff --git a/disk/part.c b/disk/part.c index 36b88205eca7..08c9331e059c 100644 --- a/disk/part.c +++ b/disk/part.c @@ -717,8 +717,11 @@ int part_get_info_by_name(struct blk_desc *desc, const char *name, for (i = 1; i < part_drv->max_entries; i++) { ret = part_drv->get_info(desc, i, info); if (ret != 0) { - /* no more entries in table */ - break; + /* + * Partition with this index can't be obtained, but + * further partitions might be, so keep checking. + */ + continue; } if (strcmp(name, (const char *)info->name) == 0) { /* matched */
In part_get_info_by_name() the inability to get some partition info shouldn't be a reason for dropping out of the loop. That might happen e.g. if the partition is hidden or unused. An example of such case are Samsung devices, where they use the "unused" GUID type (00000000-0000-0000-0000-000000000000) to indicate that the partition should be hidden from the OS. Such partitions might not be seen in "part list" output, which creates "gaps" in numbering in between of the visible partitions: Part Start LBA End LBA Name 1 0x00000400 0x0000a3ff "efs" 5 0x00026420 0x00026c1f "dtbo" 12 0x0003f390 0x0074738f "super" In that case, the loop in part_get_info_by_name() would break after partition #1, so any attempt to obtain "dtbo" or "super" partition will fail. Fix that by continuing to iterate over the remaining partitions to make sure none of the visible ones is missed. That makes "part" command (e.g. "part start", "part size") able to work with such tables. Fixes: 87b8530fe244 ("disk: part: implement generic function part_get_info_by_name()") Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org> --- disk/part.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)