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https://bugzilla.redhat.com/show_bug.cgi?id=1265694 Commit id '020135dc' didn't quite get the algorithm correct when a device mapper source ended with a non numeric value (e.g. ends with an alphabet value). This patch modifies the 'part_separator' logic to add the "p" separator to the attempted target path name only when specified as part_separator='yes'. For a source name that already ends with a number, the logic doesn't change as the part separator would need to be there. For a source name that ends with something other than a number, this allows the possibility that a "p" separator can be added. The default for one of these source devices is to not add the separator. The key for device mapper and the need for a partition separator "p" is the presence of a number in the last character of the device name link in /dev/mapper. A name such as "/dev/mapper/mpatha1" would generate a "/dev/mapper/mpatha1p1" partition, while "/dev/mapper/mpatha" would generate partition "/dev/mapper/mpatha1". Similarly for a device mapper entry not using friendly names or an alias, a device such as "/dev/mapper/3600a0b80005b10ca00005ad656fd8d93" would generate a paritition "/dev/mapper/3600a0b80005b10ca00005ad656fd8d93p1", while a device such as "/dev/mapper/3600a0b80005b10ca00005e115729093f" would generate a partition "/dev/mapper/3600a0b80005b10ca00005e115729093f1". The long number is the WWID of the device. It's also possible to assign an alias for a device mapper entry, that alias follows the same rules with respect to ending with a number or not when adding a "p" to create the target device path. |
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