Glibc provides an interface to extend the printf formats but this is not
standardized and does not work on musl. The code brought from kernel
uses %pV for varargs and also has own implementation of printk.
As a workaround for musl expand the pV value to a string and then
simply print it. The details are hidden behind macros:
- DECLARE_PV(vaf)
- PV_ASSIGN(vaf, format, args)
- PV_FMT in printf string
- PV_VAL in arguments
Signed-off-by: David Sterba <dsterba@suse.com>
We use the struct va_format to do nested printk's internally with our
message handling. Add the appropriate user space code to make this work
properly so when we start copying this code into btrfs-progs we get the
proper messages.
Note: this breaks build on musl, printf.h is not available.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
These are the printk helpers from the kernel. There were a few
modifications, the hi-lights are
- We do not have fs_info::fs_state, so that needed to be removed.
- We do not have discard.h sync'ed yet, so that dependency was dropped.
- Anything related to struct super_block was commented out.
- The transaction abort had to be modified to fit with the current
btrfs-progs code.
- Added a btrfs_no_printk() helper to common/messages.* so that the
print statements still worked.
- The 32bit limit checkers are not needed so are behind __KERNEL__
Additionally there were kerncompat.h changes that needed to be made to
handle the dependencies properly. Those are easier to spot.
Any function that needed to be modified has a MODIFIED tag in the
comment section with a list of things that were changed.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
These helpers all do variations on the same thing, so add a helper to
just do the printf part, and a macro to handle the special prefix and
postfix, and then make the helpers just use the macro and new helper.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
We have different helpers for warning_on and error_on(), which take the
condition and then do the printf. However we can just check the
condition in the macro and call the normal warning or error helper, so
clean this usage up and delete the unneeded message helpers.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Everybody who calls print_trace wraps it around this check, move the
check instead to print_trace and remove the check from all the callers.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Add similar helper to pr_verbose that prints on stderr, for commands
that need to print to stderr based on the set verbosity level.
Signed-off-by: David Sterba <dsterba@suse.com>
Factor out the level check so we can add helper for stderr as some
commands don't/can't print to stdout.
Signed-off-by: David Sterba <dsterba@suse.com>
There are messages that are supposed to be printed by default and now
use the LOG_ALWAYS level, but that's a negative level and was meant as a
workaround for commands that must really print the message.
The default log level should be 1 and can be adjusted by the -q or -v
global commands.
Signed-off-by: David Sterba <dsterba@suse.com>
There are several generic errors that repeat the same message. Define a
template for such messages, with optional text.
Signed-off-by: David Sterba <dsterba@suse.com>
In a few occasions there's an internal report, make a common helper so
the prefix message is not necessary and the stack trace can be printed
if enabled.
Signed-off-by: David Sterba <dsterba@suse.com>
Add --verbose and --quiet command options to show verbose or no output
from the subcommands. By introducing global a bconf::verbose memeber to
propagate the same down to the subcommand.
Further the added helper function pr_verbose() helps to logs the verbose
messages, based on the state of the %bconf::verbose. And further HELPINFO_
defines are provided for the usage.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
David Sterba
Josef Bacik
Anand Jain