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93f420caf4
Handle files that contain multiple logical extents in a single
physical extent properly:
- In FIEMAP terms a logical extent is a contiguous range of
sectors in the file's address space.
- One or more physically adjacent logical extents comprise a
physical extent: these are the disk areas that will be mapped
to regions.
- An extent boundary occurs when the start sector of extent
n+1 is not equal to (n.start + n.length).
This requires that we accumulate the length values of extents
returned by FIEMAP until a discontinuity is found (since each
struct fiemap_extent returned by FIEMAP only represents a single
logical extent, which may be contiguous with other logical
extents on-disk).
This avoids creating large numbers of regions for physically
adjacent (logical) extents and fixes the earlier behaviour which
would only map the first logical extent of the physical extent,
leaving gaps in the region table for these files.
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| .. | ||
| datastruct | ||
| ioctl | ||
| misc | ||
| mm | ||
| regex | ||
| .exported_symbols | ||
| .exported_symbols.Base | ||
| .exported_symbols.DM_1_02_97 | ||
| .exported_symbols.DM_1_02_98 | ||
| .exported_symbols.DM_1_02_99 | ||
| .exported_symbols.DM_1_02_100 | ||
| .exported_symbols.DM_1_02_101 | ||
| .exported_symbols.DM_1_02_103 | ||
| .exported_symbols.DM_1_02_104 | ||
| .exported_symbols.DM_1_02_105 | ||
| .exported_symbols.DM_1_02_106 | ||
| .exported_symbols.DM_1_02_107 | ||
| .exported_symbols.DM_1_02_110 | ||
| .exported_symbols.DM_1_02_113 | ||
| .exported_symbols.DM_1_02_124 | ||
| .exported_symbols.DM_1_02_128 | ||
| .exported_symbols.DM_1_02_129 | ||
| .exported_symbols.DM_1_02_131 | ||
| .exported_symbols.DM_1_02_133 | ||
| .exported_symbols.DM_1_02_135 | ||
| libdevmapper.h | ||
| libdevmapper.pc.in | ||
| libdm-common.c | ||
| libdm-common.h | ||
| libdm-config.c | ||
| libdm-deptree.c | ||
| libdm-file.c | ||
| libdm-report.c | ||
| libdm-stats.c | ||
| libdm-string.c | ||
| libdm-targets.c | ||
| libdm-timestamp.c | ||
| Makefile.in | ||