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bcachefs: use a radix tree for inum bitmap in fsck

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The change to use the cpu nr for the high bits of new inode numbers
means that inode numbers are very space - we see -ENOMEM during fsck
without this.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2020-11-07 13:03:24 -05:00 committed by Kent Overstreet
parent a3e7226268
commit fe4584765d
1 changed files with 13 additions and 26 deletions
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39
fs/bcachefs/fsck.c
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@ -866,36 +866,22 @@ static int check_lostfound(struct bch_fs *c,
return ret;
}
struct inode_bitmap {
unsigned long *bits;
size_t size;
};
typedef GENRADIX(unsigned long) inode_bitmap;
static inline bool inode_bitmap_test(struct inode_bitmap *b, size_t nr)
static inline bool inode_bitmap_test(inode_bitmap *b, size_t nr)
{
return nr < b->size ? test_bit(nr, b->bits) : false;
unsigned long *w = genradix_ptr(b, nr / BITS_PER_LONG);
return w ? test_bit(nr & (BITS_PER_LONG - 1), w) : false;
}
static inline int inode_bitmap_set(struct inode_bitmap *b, size_t nr)
static inline int inode_bitmap_set(inode_bitmap *b, size_t nr)
{
if (nr >= b->size) {
size_t new_size = max_t(size_t, max_t(size_t,
PAGE_SIZE * 8,
b->size * 2),
nr + 1);
void *n;
unsigned long *w = genradix_ptr_alloc(b, nr / BITS_PER_LONG, GFP_KERNEL);
new_size = roundup_pow_of_two(new_size);
n = krealloc(b->bits, new_size / 8, GFP_KERNEL|__GFP_ZERO);
if (!n) {
return -ENOMEM;
}
if (!w)
return -ENOMEM;
b->bits = n;
b->size = new_size;
}
__set_bit(nr, b->bits);
*w |= 1UL << (nr & (BITS_PER_LONG - 1));
return 0;
}
@ -934,7 +920,7 @@ noinline_for_stack
static int check_directory_structure(struct bch_fs *c,
struct bch_inode_unpacked *lostfound_inode)
{
struct inode_bitmap dirs_done = { NULL, 0 };
inode_bitmap dirs_done;
struct pathbuf path = { 0, 0, NULL };
struct pathbuf_entry *e;
struct btree_trans trans;
@ -951,6 +937,7 @@ static int check_directory_structure(struct bch_fs *c,
/* DFS: */
restart_dfs:
genradix_init(&dirs_done);
had_unreachable = false;
ret = inode_bitmap_set(&dirs_done, BCACHEFS_ROOT_INO);
@ -1057,7 +1044,7 @@ static int check_directory_structure(struct bch_fs *c,
if (had_unreachable) {
bch_info(c, "reattached unreachable directories, restarting pass to check for loops");
kfree(dirs_done.bits);
genradix_free(&dirs_done);
kfree(path.entries);
memset(&dirs_done, 0, sizeof(dirs_done));
memset(&path, 0, sizeof(path));
@ -1066,7 +1053,7 @@ static int check_directory_structure(struct bch_fs *c,
err:
fsck_err:
ret = bch2_trans_exit(&trans) ?: ret;
kfree(dirs_done.bits);
genradix_free(&dirs_done);
kfree(path.entries);
return ret;
}