| Age | Commit message (Collapse) | Author | Files | Lines |
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It's quite hard and unreadable the way the rule checks are organized in
should_cow_block(). We have a single if statement that returns 0 (false)
and it checks several conditions, with one them being a negated compound
condition which is particularly hard to reason immediately.
Improve on this by using multiple if statements, each checking a single
condition and returning immediately. Also change the return type from an
integer to a boolean, since all we need is to return true or false.
At least on x86_64 with Debian's gcc 14.2.0-19, this also reduces the
object code size by 64 bytes.
Before this change:
$ size fs/btrfs/btrfs.ko
text data bss dec hex filename
1913327 161567 15592 2090486 1fe5f6 fs/btrfs/btrfs.ko
After this change:
$ size fs/btrfs/btrfs.ko
text data bss dec hex filename
1913263 161567 15592 2090422 1fe5b6 fs/btrfs/btrfs.ko
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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There is no need to store the extent's ram_bytes in two variables,
further more one of them, named 'size', is used only for the extent's end
offset calculation. So remove the 'size' variable and use 'nbytes' only.
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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The comment is wrong about the part where it says a prealloc extent does
not contribute to an inode's nbytes - it does. Only holes don't contribute
and that's what we are checking for, as prealloc extents always have a
disk_bytenr different from 0. So fix the comment and re-organize the code
to not set nbytes twice and set it to the extent item's number of bytes
only if it doesn't represent a hole - in case it's a hole we have already
initialized nbytes to 0 when we declared it.
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Since the support of bs < ps support, extent_writepage_io() will submit
multiple blocks inside the folio.
But if we hit error submitting one sector, but the next sector can still
be submitted successfully, the function extent_writepage_io() will still
return 0.
This will make btrfs to silently ignore the error without setting error
flag for the filemap.
Fix it by recording the first error hit, and always return that value.
Fixes: 8bf334beb349 ("btrfs: fix double accounting race when extent_writepage_io() failed")
Reviewed-by: Daniel Vacek <neelx@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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We have several sanity checks when inserting or extending items in a btree
that verify we didn't overflow the leaf or access a slot beyond the last
one. These are cases that are never expected to be hit so mark them as
unlikely, allowing the compiler to potentially generate better code.
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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We expect that after attempting to read an extent buffer we had no errors
therefore the extent buffer is up to date, so mark the checks for a not up
to date extent buffer as unlikely and allow the compiler to pontentially
generate better code.
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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We are not expecting to ever fail the extent buffer alignment checks, so
mark them as unlikely to allow the compiler to potentially generate more
optimized code.
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Instead of dereferencing fs_info every time we need to access the node
size, store in a local variable to make the code less verbose and avoid
a line split too.
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Looking at a leaf dump from the kernel's print-tree implementation is not
so friendly to analyze since key types are printed as numbers. Improve on
this by printing key types as strings that are a diminutive of the macro
names for key types, just like we do in btrfs-progs.
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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The code for processing file extent items is quite large and it's better
to have it in a dedicated helper rather than in a huge switch statement,
just like we do in btrfs-progs.
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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We are not printing anything about the compression type, so add that
useful information in the same format as btrfs-progs.
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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We are advertising the ram_bytes of an inline extent as its data size, but
that is not true for compressed extents. The ram_bytes corresponds to the
uncompressed data size while the data size (compressed data) is given by
btrfs_file_extent_inline_item_len(). So fix this and print both values in
the same format as in btrfs-progs.
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Currently we don't print anything for extent csum items other than the
generic line with the key, item offset and item size. While one can still
determine the range the extent csum covers by doing a few simple
computations, it makes it more time consuming to analyse a leaf dump.
So add a line that prints information about the range covered by the
checksum using the same format as btrfs-progs. This is useful when
debugging log tree issues since we log extent csum items for new extents.
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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We currently don't print information about dir log items (other than the
key, item offset and item size), which is useful to look at when debugging
problems with a log tree. So print their specific information (currently
they only have an end index number) in a format similar to btrfs-progs.
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Currently we ignore inode extref items, we just print their key, item
offset in the leaf and their size, no information about their content
like the index number, parent inode, name length and name.
Improve on this by printing the index, parent and name length in the same
format as btrfs-progs. Note that we don't print the name, as that would
require some processing and escaping like we do in btrfs-progs, and that
could expose sensitive information for some users in case they share their
dmesg/syslog and it contains a leaf dump. So for now leave names out.
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Currently we ignore inode ref items, we just print their key, item offset
in the leaf and their size, no information about their content like the
index number, name length and name.
Improve on this by printing the index and name length in the same format
as btrfs-progs. Note that we don't print the name, as that would require
some processing and escaping like we do in btrfs-progs, and that could
expose sensitive information for some users in case they share their
dmesg/syslog and it contains a leaf dump. So for now leave names out.
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Currently we only print the dir items for BTRFS_DIR_ITEM_KEY keys, but
we also have dir items for BTRFS_DIR_INDEX_KEY and BTRFS_XATTR_ITEM_KEY
keys too. So print them for those keys too.
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Currently we only print the object id component of the location key from a
dir item and the flags. We are missing the whole key, transid and the name
and data lengths. We are also ignoring the fact that we can have multiple
dir item objects encoded in a single item for a BTRFS_DIR_ITEM_KEY key, so
what we print is only for the first item.
Improve on this by iterating on all dir items and print the missing
information. This is done with the same format as in btrfs-progs, what
we miss is printing the names and data since not only that would require
some processing and escaping like in btrfs-progs, but it would also reveal
information that may be sensitive and users may not want to share that in
case that get a leaf dumped in dmesg.
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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We are not dumping a lot of fields for an inode item which are useful for
debugging whenever we dump a leaf (log replay failure for example), so add
them and make it as close as possible to the print tree implementation in
btrfs-progs (things like converting timespecs to human readable dates and
converting flags to strings are missing since they are not so practical to
do in the kernel).
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Like inode refs, inode extrefs have a variable length name, which means
we have to do a proper check to make sure no header nor name can exceed
the item limits.
The check itself is very similar to check_inode_ref(), just a different
structure (btrfs_inode_extref vs btrfs_inode_ref).
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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We now have a nodesize_bits member in fs_info so we can index an extent
buffer in the backref cache by node number instead of by sector number.
While this allows for a denser index space with the possibility of using
less maple tree nodes, in practice it's unlikely to hit such benefits
since we currently limit the maximum number of keys in the cache to 128,
so unless all extent buffers are contiguous we are unlikely to see a
memory usage reduction in the backing maple tree due to fewer nodes.
Nevertheless it doesn't cost anything to index by node number and it's
more logical.
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Currently debugging log replay failures can be harder than needed, since
all we do now is abort a transaction, which gives us a line number, a
stack trace and an error code. But that is most of the times not enough
to give some clue about what went wrong. So add a new helper to abort
log replay and provide contextual information:
1) Dump the current leaf of the log tree being processed and print the
slot we are currently at and the key at that slot;
2) Dump the current subvolume tree leaf if we have any;
3) Print the current stage of log replay;
4) Print the id of the subvolume root associated with the log tree we
are currently processing (as we can have multiple);
5) Print some error message to mention what we were trying to do when we
got an error.
Replace all transaction abort calls (btrfs_abort_transaction()) with the
new helper btrfs_abort_log_replay(), which besides dumping all that extra
information, it also aborts the current transaction.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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If we fail to update the inode at link_to_fixup_dir(), we don't abort the
transaction and propagate the error up the call chain, which makes it hard
to pinpoint the error to the inode update. So abort the transaction if the
inode update call fails, so that if it happens we known immediately.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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At __add_inode_ref() if we get an error when trying to lookup a dir item
we don't abort the transaction and propagate the error up the call chain,
so that somewhere else up in the call chain the transaction is aborted.
This however makes it hard to know that the failure comes from looking up
a dir item, so add a transaction abort in case we fail there, so that we
immediately pinpoint where the problem comes from during log replay.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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At unlink_extrefs_not_in_log() we do an inode lookup of the directory but
we already have the directory inode accessible as a function argument, so
the lookup is redudant. Remove it and use the directory inode passed in as
an argument.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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There's no point in passing the inode and parent inode object IDs to
__add_inode_ref() and its helpers because we can get them by calling
btrfs_ino() against the inode and the directory inode, and we pass both
inodes to __add_inode_ref() and its helpers. So remove the object IDs
parameters to reduce arguments passed and to make things less confusing.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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While replaying log trees we need to do searches and updates to subvolume
trees and for that we use a path that we allocate in replay_one_buffer()
and then pass it as a parameter to other functions deeper in the log
replay call chain. Instead of passing it as parameter, add it to struct
walk_control since we pass a pointer to that structure for every log
replay function.
This reduces the number of arguments passed to the functions and it will
be needed and important for an upcoming changes that improves error
reporting for log replay. Also name the new filed in struct walk_control
to 'subvol_path' - while that is longer to type, the naming makes it clear
it's used for subvolume tree operations since many of the log replay
functions operate both on subvolume and log trees, and for the log tree
searches we have struct walk_control::log_leaf to also make it obvious
it's an extent buffer for a log tree extent buffer.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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At overwrite_item() we have a redundant btrfs_release_path() just before
failing with -ENOMEM, as the caller who passed in the path will free it
and therefore also release any refcounts and locks on the extent buffers
of the path. So remove it.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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At replay_one_one() we have a redundant btrfs_release_path() just before
calling insert_one_name(), as some lines above we have already released
the path with another btrfs_release_path() call. So remove it.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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There's no need to allocate 'fixup_path' at replay_one_dir_item(), as the
path passed as an argument is unused by the time link_to_fixup_dir() is
called (replay_one_name() releases the path before it returns).
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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We can avoid a path allocation in the btrfs_drop_extents() calls we have
at replay_one_extent() and replay_one_buffer() by passing the path we
already have in those contextes as it's unused by the time they call
btrfs_drop_extents().
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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There's no need to allocate a path as our single caller already has a
path that we can use. So pass the caller's path and use it.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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A lot of the log replay functions get passed the current log leaf being
processed as well as the current slot and the key at that slot. Instead
of passing them as parameters, add them to struct walk_control so that
we reduce the numbers of parameters. This is also going to be needed to
further changes that improve error reporting during log replay.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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We have this boolean 'inode_item' to tell if we are processing an inode
item key and we use it in a couple of places while in another two places
we open code by checking if the key type matches the inode item type.
Make this consistent and use the boolean everywhere. Also rename it from
'inode_item' to 'is_inode_item', which makes it more clear that it's a
boolean and not an instance of struct btrfs_inode_item, and make it const
too.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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We already have the extent buffer's level in an argument, there's no need
to first ensure the extent buffer's data is loaded (by calling
btrfs_read_extent_buffer()) and then call btrfs_header_level() to check
the level. So use the level argument and do the check before calling
btrfs_read_extent_buffer().
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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We already have the extent buffer's level in an argument, there's no need
to call btrfs_header_level(). So use the level argument and make the code
shorter.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Instead of passing the transaction and subvolume root as arguments to
overwrite_item(), pass the walk_control structure as we can grab them
from the structure. This reduces the number of arguments passed and it's
going to be needed by an incoming change that improves error reporting
for log replay.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Instead of passing the transaction as an argument to drop_one_dir_item()
and its helpers (link_to_fixup_dir() and unlink_inode_for_log_replay()),
pass the walk_control structure as we can access the transaction from it
and the subvolume root. This is going to be needed by an incoming change
that improves error reporting for log replay and also reduces the number
of arguments passed to link_to_fixup_dir().
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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replay_one_name()
Instead of passing the transaction and subvolume root and log tree as
arguments, pass the walk_control structure as we can grab all of those
from the structure. This reduces the number of arguments passed and it's
going to be needed by an incoming change that improves error reporting
for log replay.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Instead of passing the transaction, subvolume root and log tree as
arguments to add_inode_ref() and its helpers (__add_inode_ref(),
unlink_refs_not_in_log(), unlink_extrefs_not_in_log() and
unlink_old_inode_refs()), pass the walk_control structure as we can
access all of those from the structure. This reduces the number of
arguments passed and it's going to be needed by an incoming change
that improves error reporting for log replay.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Instead of passing the transaction and subvolume root as arguments to
replay_one_extent(), pass the walk_control structure as we can grab all
of those from the structure. This reduces the number of arguments passed
and it's going to be needed by an incoming change that improves error
reporting for log replay.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Instead of passing the transaction and log tree as arguments to
check_item_in_log(), pass the walk_control structure as we can grab those
from the structure. This reduces the number of arguments passed and it's
going to be needed by an incoming change that improves error reporting for
log replay. Notice that a NULL log root argument to check_item_in_log()
makes it unconditionally delete a directory entry, so since the
walk_control always has a non-NULL log root, we add an extra boolean to
check_item_in_log() to tell it if it should unconditionally delete a
directory entry, preserving the behaviour and also making it a bit more
clear.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Instead of passing the transaction, subvolume root and log tree as
arguments to replay_dir_deletes(), pass the walk_control structure as
we can grab all of those from the structure. This reduces the number of
arguments passed and it's going to be needed by an incoming change that
improves error reporting for log replay. This also requires changing
fixup_inode_link_counts() and fixup_inode_link_count() to take that
structure as an argument since fixup_inode_link_count() makes a call
to replay_dir_deletes().
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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In upcoming changes we need to pass struct walk_control as an argument to
replay_dir_deletes() and link_to_fixup_dir() so we need to move its
definition above the prototypes of those functions. So move it up right
below the enum that defines log replay stages and before any functions and
function prototypes are declared. Also fixup the comments while moving it
so that they comply with the preferred code style (capitalize the first
word in a sentence, end sentences with punctuation, makes lines wider and
closer to the 80 characters limit).
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Instead of passing the transaction, subvolume root and log tree as
arguments to replay_xattr_deletes(), pass the walk_control structure as
we can grab all of those from the structure. This reduces the number of
arguments passed and it's going to be needed by an incoming change that
improves error reporting for log replay.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Currently we have this odd behaviour:
1) At btrfs_replay_log() we drop the reference of the log root tree if
the call to btrfs_recover_log_trees() failed;
2) But if the call to btrfs_recover_log_trees() did not fail, we don't
drop the reference in btrfs_replay_log() - we expect that
btrfs_recover_log_trees() does it in case it returns success.
Let's simplify this and make btrfs_replay_log() always drop the reference
on the log root tree, not only this simplifies code as it's what makes
sense since it's btrfs_replay_log() who grabbed the reference in the first
place.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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There's no point in setting log_root_tree->log_root to NULL as this is
already NULL, we never assigned anything to it before and it's meaningless
as a log root never has a value other than NULL for the ->log_root field,
that can be not NULL only for non log roots.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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It's unncessary to pass a transaction parameter since struct walk_control
already has a member that points to the transaction, so we can make the
functions access the structure.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Instead of duplicating the dropping of a log tree in case we jump to the
'error' label, move the dropping under the 'error' label and get rid of the
the unnecessary setting of the log root to NULL since we return immediately
after.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Instead of passing an extra log root parameter for the log tree walk
functions and callbacks, add the log tree to struct walk_control and
make those functions and callbacks extract the log root from that
structure, reducing the number of parameters. This also simplifies
further upcoming changes to report log tree replay failures.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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