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Add a tool for creating small image files.
Data is written out in a reproducible order, sequentially from the
start of the device.
Metadata is initially written to a temporary device, then after writing
out data, the metadata we want to keep (alloc info is left out by
default) is migrated to the real device.
Then, the image file is trimmed to minimum size and the temporary
metadata device dropped.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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Add a command for stripping allocation info for a filesystem.
This is primarily to test codepaths used by the new image creation tool.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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New tool for scanning for backup superblocks, to recover when the
primary superblock + sb layout have been overwritten.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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This causes xfstests generic/741 to pass
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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Fixes Rust panics if some C command (like fsck) returns a value bigger
than 255. The process exit code will be mangled but what can we do, it's
less confusing than a panic (that unfortunately doesn't print the return
value).
Signed-off-by: Thomas Mühlbacher <tmuehlbacher@posteo.net>
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set-option -> set-fs-option
setattr -> set-file-option
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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Should provide us with better outputs on process failure, also makes
unwinding better and is generally recommended over `exit()`.
Signed-off-by: Thomas Mühlbacher <tmuehlbacher@posteo.net>
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Instead of the custom logger impl, which limits the features we can
easily provide for users.
This introduces the `BCACHEFS_LOG` environment variable for setting the
log verbosity. Setting `BCACHEFS_LOG=trace`, e.g. in a test environment,
will yield all log messages.
Also I think it's reasonable to print INFO level logs by default.
Signed-off-by: Thomas Mühlbacher <tmuehlbacher@posteo.net>
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Prefer using `ptr::addr_of!()` and `pointer::cast()` instead of raw `as`
where clippy complains and other type casting lints.
Signed-off-by: Thomas Mühlbacher <tmuehlbacher@posteo.net>
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Signed-off-by: Thomas Mühlbacher <tmuehlbacher@posteo.net>
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Note that we're using struct/enum align options, which require nightly.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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It is more idiomatic to use `commands::mount` than
`commands::cmd_mount`.
No functionality changes intended by this patch.
Signed-off-by: Thomas Bertschinger <tahbertschinger@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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This makes use of `BcachefsHandle` to introduce an elegant Rust driven CLI for subvolumes.
Signed-off-by: Ryan Lahfa <bcachefs@lahfa.xyz>
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We propose a simple low-level wrapper which can perform various subvolume-related operations
as an example for the API surface.
This will be used in an upcoming commit to migrate the subvolume CLI fully to Rust.
The API design is the following:
- `BcachefsHandle` is meant as a low level handle to carry around whenever you need a filesystem handle
to send ioctl to.
- it possess type-safe operations
Type safe operations are handled by having type safe wrappers for ioctl commands
*and* their payloads.
We assume that all ioctl payloads only use *one* argument, this can easily be changed if needed.
When the handle goes out of scope, we automatically close it à la C++ RAII.
Signed-off-by: Ryan Lahfa <bcachefs@lahfa.xyz>
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This moves the Rust sources out of rust_src/ and into the top level.
Running the bcachefs executable out of the development tree is now:
$ ./target/release/bcachefs command
or
$ cargo run --profile release -- command
instead of "./bcachefs command".
Building and installing is still:
$ make && make install
Signed-off-by: Thomas Bertschinger <tahbertschinger@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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