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konisakpm00
konis
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akpm00
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nilfs2: convert DAT file to be folio-based
Regarding the DAT, a metadata file that manages virtual block addresses, convert the page-based implementation to a folio-based implementation. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Ryusuke Konishi <[email protected]> Cc: Matthew Wilcox (Oracle) <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
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1 file changed

+52
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‎fs/nilfs2/dat.c‎

Lines changed: 52 additions & 46 deletions
Original file line numberDiff line numberDiff line change
@@ -89,15 +89,15 @@ int nilfs_dat_prepare_alloc(struct inode *dat, struct nilfs_palloc_req *req)
8989
void nilfs_dat_commit_alloc(struct inode *dat, struct nilfs_palloc_req *req)
9090
{
9191
struct nilfs_dat_entry *entry;
92-
void *kaddr;
92+
size_t offset;
9393

94-
kaddr = kmap_local_page(req->pr_entry_bh->b_page);
95-
entry = nilfs_palloc_block_get_entry(dat, req->pr_entry_nr,
96-
req->pr_entry_bh, kaddr);
94+
offset = nilfs_palloc_entry_offset(dat, req->pr_entry_nr,
95+
req->pr_entry_bh);
96+
entry = kmap_local_folio(req->pr_entry_bh->b_folio, offset);
9797
entry->de_start = cpu_to_le64(NILFS_CNO_MIN);
9898
entry->de_end = cpu_to_le64(NILFS_CNO_MAX);
9999
entry->de_blocknr = cpu_to_le64(0);
100-
kunmap_local(kaddr);
100+
kunmap_local(entry);
101101

102102
nilfs_palloc_commit_alloc_entry(dat, req);
103103
nilfs_dat_commit_entry(dat, req);
@@ -113,15 +113,15 @@ static void nilfs_dat_commit_free(struct inode *dat,
113113
struct nilfs_palloc_req *req)
114114
{
115115
struct nilfs_dat_entry *entry;
116-
void *kaddr;
116+
size_t offset;
117117

118-
kaddr = kmap_local_page(req->pr_entry_bh->b_page);
119-
entry = nilfs_palloc_block_get_entry(dat, req->pr_entry_nr,
120-
req->pr_entry_bh, kaddr);
118+
offset = nilfs_palloc_entry_offset(dat, req->pr_entry_nr,
119+
req->pr_entry_bh);
120+
entry = kmap_local_folio(req->pr_entry_bh->b_folio, offset);
121121
entry->de_start = cpu_to_le64(NILFS_CNO_MIN);
122122
entry->de_end = cpu_to_le64(NILFS_CNO_MIN);
123123
entry->de_blocknr = cpu_to_le64(0);
124-
kunmap_local(kaddr);
124+
kunmap_local(entry);
125125

126126
nilfs_dat_commit_entry(dat, req);
127127

@@ -143,14 +143,14 @@ void nilfs_dat_commit_start(struct inode *dat, struct nilfs_palloc_req *req,
143143
sector_t blocknr)
144144
{
145145
struct nilfs_dat_entry *entry;
146-
void *kaddr;
146+
size_t offset;
147147

148-
kaddr = kmap_local_page(req->pr_entry_bh->b_page);
149-
entry = nilfs_palloc_block_get_entry(dat, req->pr_entry_nr,
150-
req->pr_entry_bh, kaddr);
148+
offset = nilfs_palloc_entry_offset(dat, req->pr_entry_nr,
149+
req->pr_entry_bh);
150+
entry = kmap_local_folio(req->pr_entry_bh->b_folio, offset);
151151
entry->de_start = cpu_to_le64(nilfs_mdt_cno(dat));
152152
entry->de_blocknr = cpu_to_le64(blocknr);
153-
kunmap_local(kaddr);
153+
kunmap_local(entry);
154154

155155
nilfs_dat_commit_entry(dat, req);
156156
}
@@ -160,19 +160,19 @@ int nilfs_dat_prepare_end(struct inode *dat, struct nilfs_palloc_req *req)
160160
struct nilfs_dat_entry *entry;
161161
__u64 start;
162162
sector_t blocknr;
163-
void *kaddr;
163+
size_t offset;
164164
int ret;
165165

166166
ret = nilfs_dat_prepare_entry(dat, req, 0);
167167
if (ret < 0)
168168
return ret;
169169

170-
kaddr = kmap_local_page(req->pr_entry_bh->b_page);
171-
entry = nilfs_palloc_block_get_entry(dat, req->pr_entry_nr,
172-
req->pr_entry_bh, kaddr);
170+
offset = nilfs_palloc_entry_offset(dat, req->pr_entry_nr,
171+
req->pr_entry_bh);
172+
entry = kmap_local_folio(req->pr_entry_bh->b_folio, offset);
173173
start = le64_to_cpu(entry->de_start);
174174
blocknr = le64_to_cpu(entry->de_blocknr);
175-
kunmap_local(kaddr);
175+
kunmap_local(entry);
176176

177177
if (blocknr == 0) {
178178
ret = nilfs_palloc_prepare_free_entry(dat, req);
@@ -200,19 +200,19 @@ void nilfs_dat_commit_end(struct inode *dat, struct nilfs_palloc_req *req,
200200
struct nilfs_dat_entry *entry;
201201
__u64 start, end;
202202
sector_t blocknr;
203-
void *kaddr;
203+
size_t offset;
204204

205-
kaddr = kmap_local_page(req->pr_entry_bh->b_page);
206-
entry = nilfs_palloc_block_get_entry(dat, req->pr_entry_nr,
207-
req->pr_entry_bh, kaddr);
205+
offset = nilfs_palloc_entry_offset(dat, req->pr_entry_nr,
206+
req->pr_entry_bh);
207+
entry = kmap_local_folio(req->pr_entry_bh->b_folio, offset);
208208
end = start = le64_to_cpu(entry->de_start);
209209
if (!dead) {
210210
end = nilfs_mdt_cno(dat);
211211
WARN_ON(start > end);
212212
}
213213
entry->de_end = cpu_to_le64(end);
214214
blocknr = le64_to_cpu(entry->de_blocknr);
215-
kunmap_local(kaddr);
215+
kunmap_local(entry);
216216

217217
if (blocknr == 0)
218218
nilfs_dat_commit_free(dat, req);
@@ -225,14 +225,14 @@ void nilfs_dat_abort_end(struct inode *dat, struct nilfs_palloc_req *req)
225225
struct nilfs_dat_entry *entry;
226226
__u64 start;
227227
sector_t blocknr;
228-
void *kaddr;
228+
size_t offset;
229229

230-
kaddr = kmap_local_page(req->pr_entry_bh->b_page);
231-
entry = nilfs_palloc_block_get_entry(dat, req->pr_entry_nr,
232-
req->pr_entry_bh, kaddr);
230+
offset = nilfs_palloc_entry_offset(dat, req->pr_entry_nr,
231+
req->pr_entry_bh);
232+
entry = kmap_local_folio(req->pr_entry_bh->b_folio, offset);
233233
start = le64_to_cpu(entry->de_start);
234234
blocknr = le64_to_cpu(entry->de_blocknr);
235-
kunmap_local(kaddr);
235+
kunmap_local(entry);
236236

237237
if (start == nilfs_mdt_cno(dat) && blocknr == 0)
238238
nilfs_palloc_abort_free_entry(dat, req);
@@ -336,7 +336,7 @@ int nilfs_dat_move(struct inode *dat, __u64 vblocknr, sector_t blocknr)
336336
{
337337
struct buffer_head *entry_bh;
338338
struct nilfs_dat_entry *entry;
339-
void *kaddr;
339+
size_t offset;
340340
int ret;
341341

342342
ret = nilfs_palloc_get_entry_block(dat, vblocknr, 0, &entry_bh);
@@ -359,21 +359,21 @@ int nilfs_dat_move(struct inode *dat, __u64 vblocknr, sector_t blocknr)
359359
}
360360
}
361361

362-
kaddr = kmap_local_page(entry_bh->b_page);
363-
entry = nilfs_palloc_block_get_entry(dat, vblocknr, entry_bh, kaddr);
362+
offset = nilfs_palloc_entry_offset(dat, vblocknr, entry_bh);
363+
entry = kmap_local_folio(entry_bh->b_folio, offset);
364364
if (unlikely(entry->de_blocknr == cpu_to_le64(0))) {
365365
nilfs_crit(dat->i_sb,
366366
"%s: invalid vblocknr = %llu, [%llu, %llu)",
367367
__func__, (unsigned long long)vblocknr,
368368
(unsigned long long)le64_to_cpu(entry->de_start),
369369
(unsigned long long)le64_to_cpu(entry->de_end));
370-
kunmap_local(kaddr);
370+
kunmap_local(entry);
371371
brelse(entry_bh);
372372
return -EINVAL;
373373
}
374374
WARN_ON(blocknr == 0);
375375
entry->de_blocknr = cpu_to_le64(blocknr);
376-
kunmap_local(kaddr);
376+
kunmap_local(entry);
377377

378378
mark_buffer_dirty(entry_bh);
379379
nilfs_mdt_mark_dirty(dat);
@@ -407,7 +407,7 @@ int nilfs_dat_translate(struct inode *dat, __u64 vblocknr, sector_t *blocknrp)
407407
struct buffer_head *entry_bh, *bh;
408408
struct nilfs_dat_entry *entry;
409409
sector_t blocknr;
410-
void *kaddr;
410+
size_t offset;
411411
int ret;
412412

413413
ret = nilfs_palloc_get_entry_block(dat, vblocknr, 0, &entry_bh);
@@ -423,8 +423,8 @@ int nilfs_dat_translate(struct inode *dat, __u64 vblocknr, sector_t *blocknrp)
423423
}
424424
}
425425

426-
kaddr = kmap_local_page(entry_bh->b_page);
427-
entry = nilfs_palloc_block_get_entry(dat, vblocknr, entry_bh, kaddr);
426+
offset = nilfs_palloc_entry_offset(dat, vblocknr, entry_bh);
427+
entry = kmap_local_folio(entry_bh->b_folio, offset);
428428
blocknr = le64_to_cpu(entry->de_blocknr);
429429
if (blocknr == 0) {
430430
ret = -ENOENT;
@@ -433,7 +433,7 @@ int nilfs_dat_translate(struct inode *dat, __u64 vblocknr, sector_t *blocknrp)
433433
*blocknrp = blocknr;
434434

435435
out:
436-
kunmap_local(kaddr);
436+
kunmap_local(entry);
437437
brelse(entry_bh);
438438
return ret;
439439
}
@@ -442,35 +442,41 @@ ssize_t nilfs_dat_get_vinfo(struct inode *dat, void *buf, unsigned int visz,
442442
size_t nvi)
443443
{
444444
struct buffer_head *entry_bh;
445-
struct nilfs_dat_entry *entry;
445+
struct nilfs_dat_entry *entry, *first_entry;
446446
struct nilfs_vinfo *vinfo = buf;
447447
__u64 first, last;
448-
void *kaddr;
448+
size_t offset;
449449
unsigned long entries_per_block = NILFS_MDT(dat)->mi_entries_per_block;
450+
unsigned int entry_size = NILFS_MDT(dat)->mi_entry_size;
450451
int i, j, n, ret;
451452

452453
for (i = 0; i < nvi; i += n) {
453454
ret = nilfs_palloc_get_entry_block(dat, vinfo->vi_vblocknr,
454455
0, &entry_bh);
455456
if (ret < 0)
456457
return ret;
457-
kaddr = kmap_local_page(entry_bh->b_page);
458-
/* last virtual block number in this block */
458+
459459
first = vinfo->vi_vblocknr;
460460
first = div64_ul(first, entries_per_block);
461461
first *= entries_per_block;
462+
/* first virtual block number in this block */
463+
462464
last = first + entries_per_block - 1;
465+
/* last virtual block number in this block */
466+
467+
offset = nilfs_palloc_entry_offset(dat, first, entry_bh);
468+
first_entry = kmap_local_folio(entry_bh->b_folio, offset);
463469
for (j = i, n = 0;
464470
j < nvi && vinfo->vi_vblocknr >= first &&
465471
vinfo->vi_vblocknr <= last;
466472
j++, n++, vinfo = (void *)vinfo + visz) {
467-
entry = nilfs_palloc_block_get_entry(
468-
dat, vinfo->vi_vblocknr, entry_bh, kaddr);
473+
entry = (void *)first_entry +
474+
(vinfo->vi_vblocknr - first) * entry_size;
469475
vinfo->vi_start = le64_to_cpu(entry->de_start);
470476
vinfo->vi_end = le64_to_cpu(entry->de_end);
471477
vinfo->vi_blocknr = le64_to_cpu(entry->de_blocknr);
472478
}
473-
kunmap_local(kaddr);
479+
kunmap_local(first_entry);
474480
brelse(entry_bh);
475481
}
476482

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