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xfs: don't ifdef around the exact minlen allocations

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Exact minlen allocations only exist as an error injection tool for debug
builds.  Currently this is implemented using ifdefs, which means the code
isn't even compiled for non-XFS_DEBUG builds.  Enhance the compile test
coverage by always building the code and use the compilers' dead code
elimination to remove it from the generated binary instead.

The only downside is that the alloc_minlen_only field is unconditionally
added to struct xfs_alloc_args now, but by moving it around and packing
it tightly this doesn't actually increase the size of the structure.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Carlos Maiolino <cem@kernel.org>
This commit is contained in:
Christoph Hellwig 2024-09-18 07:30:08 +02:00 committed by Carlos Maiolino
parent 865469cd41
commit b611fddc04
3 changed files with 3 additions and 14 deletions
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7
fs/xfs/libxfs/xfs_alloc.c
View File

@ -2766,7 +2766,6 @@ xfs_alloc_commit_autoreap(
xfs_defer_item_unpause(tp, aarp->dfp);
}
#ifdef DEBUG
/*
* Check if an AGF has a free extent record whose length is equal to
* args->minlen.
@ -2806,7 +2805,6 @@ out:
return error;
}
#endif
/*
* Decide whether to use this allocation group for this allocation.
@ -2880,15 +2878,14 @@ xfs_alloc_fix_freelist(
if (!xfs_alloc_space_available(args, need, alloc_flags))
goto out_agbp_relse;
#ifdef DEBUG
if (args->alloc_minlen_only) {
if (IS_ENABLED(CONFIG_XFS_DEBUG) && args->alloc_minlen_only) {
int stat;
error = xfs_exact_minlen_extent_available(args, agbp, &stat);
if (error || !stat)
goto out_agbp_relse;
}
#endif
/*
* Make the freelist shorter if it's too long.
*

4
fs/xfs/libxfs/xfs_alloc.h
View File

@ -53,11 +53,9 @@ typedef struct xfs_alloc_arg {
int datatype; /* mask defining data type treatment */
char wasdel; /* set if allocation was prev delayed */
char wasfromfl; /* set if allocation is from freelist */
bool alloc_minlen_only; /* allocate exact minlen extent */
struct xfs_owner_info oinfo; /* owner of blocks being allocated */
enum xfs_ag_resv_type resv; /* block reservation to use */
#ifdef DEBUG
bool alloc_minlen_only; /* allocate exact minlen extent */
#endif
} xfs_alloc_arg_t;
/*

6
fs/xfs/libxfs/xfs_bmap.c
View File

@ -3477,7 +3477,6 @@ xfs_bmap_process_allocated_extent(
xfs_bmap_alloc_account(ap);
}
#ifdef DEBUG
static int
xfs_bmap_exact_minlen_extent_alloc(
struct xfs_bmalloca *ap)
@ -3539,11 +3538,6 @@ xfs_bmap_exact_minlen_extent_alloc(
return 0;
}
#else
#define xfs_bmap_exact_minlen_extent_alloc(bma) (-EFSCORRUPTED)
#endif
/*
* If we are not low on available data blocks and we are allocating at