Documentation/admin-guide/device-mapper/linear.rst

File Facts

System

Linux kernel

Corpus path

Documentation/admin-guide/device-mapper/linear.rst

Extension

.rst

Size

1490 bytes

Lines

64

Domain

Support Tooling And Documentation

Bucket

Documentation

Inferred role

Support Tooling And Documentation: documentation

Status

atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

• Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

• No C-style include directives detected by the generator.

Detected Declarations

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

if (!defined($dev)) {
          die("Please specify a device.\n");
  }

  my $dev_size = `blockdev --getsz $dev`;
  my $extents = int($dev_size / $extent_size) -
                (($dev_size % $extent_size) ? 1 : 0);

  while ($extents > 0) {
          my $this_start = $count * $extent_size;
          $extents--;
          $count++;
          my $this_offset = $extents * $extent_size;

          $table .= "$this_start $extent_size linear $dev $this_offset\n";
  }

  `echo \"$table\" | dmsetup create $name`;

Annotation

• Atlas domain: Support Tooling And Documentation / Documentation.
• Implementation status: atlas-only.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.