[Crash-utility] [PATCH v3 0/5] Improve handling of incomplete dumps

Hi all, makedumpfile may produce an incomplete dump if interrupted early or in case if an unrecoverable I/O error happens during the execution of makedumpfile. As of now crash begins analysis of such incomplete dump and fails in some misleading way. The series helps crash to avoid going too far with incomplete dumps while provides means to localize how much data is lost in the core. Changes since v2 (https://listman.redhat.com/archives/crash-utility/2021-June/msg00066.html): - Fixed up messed up printf format specifiers in the last patch - Fixed warning condition in the last patch to rely only on comparison of the expected size and the actual dump size. The expected size is increased by the page size if we hit incomplete/empty page descriptor. Therefore the expected size for incomplete dumps is going to be strictly higher than the actual file size. Changes since v1 (https://listman.redhat.com/archives/crash-utility/2021-June/msg00009.html): - Fixed stale comments (Lianbo) - Enabled --zero_excluded for ELF dumps (Kazu) - Dropped dd->total_valid_pages in the second patch (which became patch 3 in the series) and instead introduced dd->max_sect_len to access total valid pages from the last bucket in dd->valid_pages array. - Added an explicit warning for incomplete compressed kdumps. Thanks, Roman Roman Bolshakov (5): diskdump: Fail readmem() early if dump is incomplete netdump: Permit --zero_excluded for incomplete ELF dumps diskdump: Print total number of dumpable pages diskdump: Introduce read_pd() diskdump: Warn on incomplete dumps defs.h | 1 + diskdump.c | 123 ++++++++++++++++++++++++++++++++++++++++++++++------- memory.c | 7 +++ netdump.c | 5 +-- 4 files changed, 117 insertions(+), 19 deletions(-) -- 2.32.0