linux.git/fs/btrfs/backref.c, branch v4.12

btrfs: replace hardcoded value with SEQ_LAST macro

2017-04-18T12:07:25+00:00

Define the SEQ_LAST macro to replace (u64)-1 in places where said
value triggers a special-case ref search behavior.

Signed-off-by: Edmund Nadolski 
Reviewed-by: Jeff Mahoney 
Reviewed-by: Qu Wenruo 
Signed-off-by: David Sterba

btrfs: provide enumeration for __merge_refs mode argument

2017-04-18T12:07:25+00:00

Replace hardcoded numeric values for __merge_refs 'mode' argument
with descriptive constants.

Signed-off-by: Edmund Nadolski 
Reviewed-by: Jeff Mahoney 
Signed-off-by: David Sterba

btrfs: convert btrfs_delayed_ref_node.refs from atomic_t to refcount_t

2017-04-18T12:07:23+00:00

refcount_t type and corresponding API should be
used instead of atomic_t when the variable is used as
a reference counter. This allows to avoid accidental
refcounter overflows that might lead to use-after-free
situations.

Signed-off-by: Elena Reshetova 
Signed-off-by: Hans Liljestrand 
Signed-off-by: Kees Cook 
Signed-off-by: David Windsor 
Signed-off-by: David Sterba

btrfs: remove unused parameter from __add_inline_refs

2017-02-17T11:03:54+00:00

Never used.

Reviewed-by: Liu Bo 
Signed-off-by: David Sterba

Btrfs: pass delayed_refs directly to btrfs_find_delayed_ref_head

2017-02-14T14:50:59+00:00

All we need is @delayed_refs, all callers have get it ahead of calling
btrfs_find_delayed_ref_head since lock needs to be acquired firstly,
there is no reason to deference it again inside the function.

Signed-off-by: Liu Bo 
Reviewed-by: David Sterba 
Signed-off-by: David Sterba

btrfs: remove root parameter from transaction commit/end routines

2016-12-06T15:07:00+00:00

Now we only use the root parameter to print the root objectid in
a tracepoint.  We can use the root parameter from the transaction
handle for that.  It's also used to join the transaction with
async commits, so we remove the comment that it's just for checking.

Signed-off-by: Jeff Mahoney 
Signed-off-by: David Sterba

btrfs: take an fs_info directly when the root is not used otherwise

2016-12-06T15:06:59+00:00

There are loads of functions in btrfs that accept a root parameter
but only use it to obtain an fs_info pointer.  Let's convert those to
just accept an fs_info pointer directly.

Signed-off-by: Jeff Mahoney 
Signed-off-by: David Sterba

btrfs: pull node/sector/stripe sizes out of root and into fs_info

2016-12-06T15:06:58+00:00

We track the node sizes per-root, but they never vary from the values
in the superblock.  This patch messes with the 80-column style a bit,
but subsequent patches to factor out root->fs_info into a convenience
variable fix it up again.

Signed-off-by: Jeff Mahoney 
Signed-off-by: David Sterba

btrfs: convert pr_* to btrfs_* where possible

2016-09-26T17:37:04+00:00

For many printks, we want to know which file system issued the message.

This patch converts most pr_* calls to use the btrfs_* versions instead.
In some cases, this means adding plumbing to allow call sites access to
an fs_info pointer.

fs/btrfs/check-integrity.c is left alone for another day.

Signed-off-by: Jeff Mahoney 
Reviewed-by: David Sterba 
Signed-off-by: David Sterba

btrfs: unsplit printed strings

2016-09-26T16:08:44+00:00

CodingStyle chapter 2:
"[...] never break user-visible strings such as printk messages,
because that breaks the ability to grep for them."

This patch unsplits user-visible strings.

Signed-off-by: Jeff Mahoney 
Signed-off-by: David Sterba