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Add scoutfs_alloc_meta_remaining

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Add helper function to give the caller the number of blocks remaining in
the first list block that's used for meta allocation and freeing.

Signed-off-by: Zach Brown <zab@versity.com>
This commit is contained in:
Zach Brown
2022-03-23 12:42:33 -07:00
parent 44f38a31ec
commit 96ad8dd510
2 changed files with 12 additions and 0 deletions
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11
kmod/src/alloc.c
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@@ -1318,6 +1318,17 @@ bool scoutfs_alloc_meta_low(struct super_block *sb,
return lo;
}
void scoutfs_alloc_meta_remaining(struct scoutfs_alloc *alloc, u32 *avail_total, u32 *freed_space)
{
unsigned int seq;
do {
seq = read_seqbegin(&alloc->seqlock);
*avail_total = le32_to_cpu(alloc->avail.first_nr);
*freed_space = list_block_space(alloc->freed.first_nr);
} while (read_seqretry(&alloc->seqlock, seq));
}
bool scoutfs_alloc_test_flag(struct super_block *sb,
struct scoutfs_alloc *alloc, u32 flag)
{

1
kmod/src/alloc.h
View File

@@ -158,6 +158,7 @@ int scoutfs_alloc_splice_list(struct super_block *sb,
bool scoutfs_alloc_meta_low(struct super_block *sb,
struct scoutfs_alloc *alloc, u32 nr);
void scoutfs_alloc_meta_remaining(struct scoutfs_alloc *alloc, u32 *avail_total, u32 *freed_space);
bool scoutfs_alloc_test_flag(struct super_block *sb,
struct scoutfs_alloc *alloc, u32 flag);