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fs/ntfs3: Accumulated refactoring changes

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Changes made to improve readability and debuggability.

Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
This commit is contained in:
Konstantin Komarov 2024-10-10 20:06:59 +03:00
parent 678c1901af
commit bac89bb33d
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GPG Key ID: A9B0331F832407B6
4 changed files with 21 additions and 50 deletions
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62
fs/ntfs3/bitmap.c
View File

@ -710,20 +710,17 @@ int wnd_set_free(struct wnd_bitmap *wnd, size_t bit, size_t bits)
{
int err = 0;
struct super_block *sb = wnd->sb;
size_t bits0 = bits;
u32 wbits = 8 * sb->s_blocksize;
size_t iw = bit >> (sb->s_blocksize_bits + 3);
u32 wbit = bit & (wbits - 1);
struct buffer_head *bh;
u32 op;
while (iw < wnd->nwnd && bits) {
u32 tail, op;
for (; iw < wnd->nwnd && bits; iw++, bit += op, bits -= op, wbit = 0) {
if (iw + 1 == wnd->nwnd)
wbits = wnd->bits_last;
tail = wbits - wbit;
op = min_t(u32, tail, bits);
op = min_t(u32, wbits - wbit, bits);
bh = wnd_map(wnd, iw);
if (IS_ERR(bh)) {
@ -736,20 +733,15 @@ int wnd_set_free(struct wnd_bitmap *wnd, size_t bit, size_t bits)
ntfs_bitmap_clear_le(bh->b_data, wbit, op);
wnd->free_bits[iw] += op;
wnd->total_zeroes += op;
set_buffer_uptodate(bh);
mark_buffer_dirty(bh);
unlock_buffer(bh);
put_bh(bh);
wnd->total_zeroes += op;
bits -= op;
wbit = 0;
iw += 1;
wnd_add_free_ext(wnd, bit, op, false);
}
wnd_add_free_ext(wnd, bit, bits0, false);
return err;
}
@ -760,20 +752,17 @@ int wnd_set_used(struct wnd_bitmap *wnd, size_t bit, size_t bits)
{
int err = 0;
struct super_block *sb = wnd->sb;
size_t bits0 = bits;
size_t iw = bit >> (sb->s_blocksize_bits + 3);
u32 wbits = 8 * sb->s_blocksize;
u32 wbit = bit & (wbits - 1);
struct buffer_head *bh;
u32 op;
while (iw < wnd->nwnd && bits) {
u32 tail, op;
for (; iw < wnd->nwnd && bits; iw++, bit += op, bits -= op, wbit = 0) {
if (unlikely(iw + 1 == wnd->nwnd))
wbits = wnd->bits_last;
tail = wbits - wbit;
op = min_t(u32, tail, bits);
op = min_t(u32, wbits - wbit, bits);
bh = wnd_map(wnd, iw);
if (IS_ERR(bh)) {
@ -785,21 +774,16 @@ int wnd_set_used(struct wnd_bitmap *wnd, size_t bit, size_t bits)
ntfs_bitmap_set_le(bh->b_data, wbit, op);
wnd->free_bits[iw] -= op;
wnd->total_zeroes -= op;
set_buffer_uptodate(bh);
mark_buffer_dirty(bh);
unlock_buffer(bh);
put_bh(bh);
wnd->total_zeroes -= op;
bits -= op;
wbit = 0;
iw += 1;
if (!RB_EMPTY_ROOT(&wnd->start_tree))
wnd_remove_free_ext(wnd, bit, op);
}
if (!RB_EMPTY_ROOT(&wnd->start_tree))
wnd_remove_free_ext(wnd, bit, bits0);
return err;
}
@ -852,15 +836,13 @@ static bool wnd_is_free_hlp(struct wnd_bitmap *wnd, size_t bit, size_t bits)
size_t iw = bit >> (sb->s_blocksize_bits + 3);
u32 wbits = 8 * sb->s_blocksize;
u32 wbit = bit & (wbits - 1);
u32 op;
while (iw < wnd->nwnd && bits) {
u32 tail, op;
for (; iw < wnd->nwnd && bits; iw++, bits -= op, wbit = 0) {
if (unlikely(iw + 1 == wnd->nwnd))
wbits = wnd->bits_last;
tail = wbits - wbit;
op = min_t(u32, tail, bits);
op = min_t(u32, wbits - wbit, bits);
if (wbits != wnd->free_bits[iw]) {
bool ret;
@ -875,10 +857,6 @@ static bool wnd_is_free_hlp(struct wnd_bitmap *wnd, size_t bit, size_t bits)
if (!ret)
return false;
}
bits -= op;
wbit = 0;
iw += 1;
}
return true;
@ -928,6 +906,7 @@ bool wnd_is_used(struct wnd_bitmap *wnd, size_t bit, size_t bits)
size_t iw = bit >> (sb->s_blocksize_bits + 3);
u32 wbits = 8 * sb->s_blocksize;
u32 wbit = bit & (wbits - 1);
u32 op;
size_t end;
struct rb_node *n;
struct e_node *e;
@ -945,14 +924,11 @@ bool wnd_is_used(struct wnd_bitmap *wnd, size_t bit, size_t bits)
return false;
use_wnd:
while (iw < wnd->nwnd && bits) {
u32 tail, op;
for (; iw < wnd->nwnd && bits; iw++, bits -= op, wbit = 0) {
if (unlikely(iw + 1 == wnd->nwnd))
wbits = wnd->bits_last;
tail = wbits - wbit;
op = min_t(u32, tail, bits);
op = min_t(u32, wbits - wbit, bits);
if (wnd->free_bits[iw]) {
bool ret;
@ -966,10 +942,6 @@ bool wnd_is_used(struct wnd_bitmap *wnd, size_t bit, size_t bits)
if (!ret)
goto out;
}
bits -= op;
wbit = 0;
iw += 1;
}
ret = true;

1
fs/ntfs3/frecord.c
View File

@ -1958,7 +1958,6 @@ int ni_fiemap(struct ntfs_inode *ni, struct fiemap_extent_info *fieinfo,
if (end > alloc_size)
end = alloc_size;
while (vbo < end) {
if (idx == -1) {
ok = run_lookup_entry(&run, vcn, &lcn, &clen, &idx);

2
fs/ntfs3/fsntfs.c
View File

@ -2699,4 +2699,4 @@ int ntfs_set_label(struct ntfs_sb_info *sbi, u8 *label, int len)
out:
__putname(uni);
return err;
}
}

6
fs/ntfs3/run.c
View File

@ -1112,9 +1112,9 @@ int run_unpack_ex(struct runs_tree *run, struct ntfs_sb_info *sbi, CLST ino,
err = wnd_set_used_safe(wnd, lcn, len, &done);
if (zone) {
/* Restore zone. Lock mft run. */
struct rw_semaphore *lock;
lock = is_mounted(sbi) ? &sbi->mft.ni->file.run_lock :
NULL;
struct rw_semaphore *lock =
is_mounted(sbi) ? &sbi->mft.ni->file.run_lock :
NULL;
if (lock)
down_read(lock);
ntfs_refresh_zone(sbi);