pages[i] = pg;
}
- err = ni_read_frame(ni, frame_vbo, pages, pages_per_frame);
+ err = ni_read_frame(ni, frame_vbo, pages, pages_per_frame, 0);
out1:
for (i = 0; i < pages_per_frame; i++) {
*/
index = 0;
for (vbo = 0; vbo < i_size; vbo += bytes) {
- u32 nr_pages;
bool new;
- if (vbo + frame_size > i_size) {
- bytes = i_size - vbo;
- nr_pages = (bytes + PAGE_SIZE - 1) >> PAGE_SHIFT;
- } else {
- nr_pages = pages_per_frame;
- bytes = frame_size;
- }
-
+ bytes = vbo + frame_size > i_size ? (i_size - vbo) : frame_size;
end = bytes_to_cluster(sbi, vbo + bytes);
for (vcn = vbo >> sbi->cluster_bits; vcn < end; vcn += clen) {
pages[i] = pg;
}
- err = ni_read_frame(ni, vbo, pages, pages_per_frame);
-
- if (!err) {
- down_read(&ni->file.run_lock);
- err = ntfs_bio_pages(sbi, &ni->file.run, pages,
- nr_pages, vbo, bytes,
- REQ_OP_WRITE);
- up_read(&ni->file.run_lock);
- }
+ err = ni_read_frame(ni, vbo, pages, pages_per_frame, 1);
for (i = 0; i < pages_per_frame; i++) {
unlock_page(pages[i]);
* Pages - Array of locked pages.
*/
int ni_read_frame(struct ntfs_inode *ni, u64 frame_vbo, struct page **pages,
- u32 pages_per_frame)
+ u32 pages_per_frame, int copy)
{
int err;
struct ntfs_sb_info *sbi = ni->mi.sbi;
u8 cluster_bits = sbi->cluster_bits;
char *frame_ondisk = NULL;
char *frame_mem = NULL;
- struct page **pages_disk = NULL;
struct ATTR_LIST_ENTRY *le = NULL;
struct runs_tree *run = &ni->file.run;
u64 valid_size = ni->i_valid;
u64 vbo_disk;
size_t unc_size;
- u32 frame_size, i, npages_disk, ondisk_size;
+ u32 frame_size, i, ondisk_size;
struct page *pg;
struct ATTRIB *attr;
CLST frame, clst_data;
err = attr_wof_frame_info(ni, attr, run, frame64, frames,
frame_bits, &ondisk_size, &vbo_data);
if (err)
- goto out2;
+ goto out1;
if (frame64 == frames) {
unc_size = 1 + ((i_size - 1) & (frame_size - 1));
if (ondisk_size > frame_size) {
err = -EINVAL;
- goto out2;
+ goto out1;
}
if (!attr->non_res) {
ARRAY_SIZE(WOF_NAME), run, vbo_disk,
vbo_data + ondisk_size);
if (err)
- goto out2;
- npages_disk = (ondisk_size + (vbo_disk & (PAGE_SIZE - 1)) +
- PAGE_SIZE - 1) >>
- PAGE_SHIFT;
+ goto out1;
#endif
} else if (is_attr_compressed(attr)) {
/* LZNT compression. */
if (clst_data >= NTFS_LZNT_CLUSTERS) {
/* Frame is not compressed. */
down_read(&ni->file.run_lock);
- err = ntfs_bio_pages(sbi, run, pages, pages_per_frame,
- frame_vbo, ondisk_size,
- REQ_OP_READ);
+ err = ntfs_read_run(sbi, run, frame_mem, frame_vbo,
+ ondisk_size);
up_read(&ni->file.run_lock);
goto out1;
}
vbo_disk = frame_vbo;
- npages_disk = (ondisk_size + PAGE_SIZE - 1) >> PAGE_SHIFT;
} else {
__builtin_unreachable();
err = -EINVAL;
goto out1;
}
- pages_disk = kcalloc(npages_disk, sizeof(*pages_disk), GFP_NOFS);
- if (!pages_disk) {
+ /* Allocate memory to read compressed data to. */
+ frame_ondisk = kvmalloc(ondisk_size, GFP_KERNEL);
+ if (!frame_ondisk) {
err = -ENOMEM;
- goto out2;
- }
-
- for (i = 0; i < npages_disk; i++) {
- pg = alloc_page(GFP_KERNEL);
- if (!pg) {
- err = -ENOMEM;
- goto out3;
- }
- pages_disk[i] = pg;
- lock_page(pg);
+ goto out1;
}
/* Read 'ondisk_size' bytes from disk. */
down_read(&ni->file.run_lock);
- err = ntfs_bio_pages(sbi, run, pages_disk, npages_disk, vbo_disk,
- ondisk_size, REQ_OP_READ);
+ err = ntfs_read_run(sbi, run, frame_ondisk, vbo_disk, ondisk_size);
up_read(&ni->file.run_lock);
if (err)
- goto out3;
-
- /*
- * To simplify decompress algorithm do vmap for source and target pages.
- */
- frame_ondisk = vmap(pages_disk, npages_disk, VM_MAP, PAGE_KERNEL_RO);
- if (!frame_ondisk) {
- err = -ENOMEM;
- goto out3;
- }
+ goto out2;
- /* Decompress: Frame_ondisk -> frame_mem. */
#ifdef CONFIG_NTFS3_LZX_XPRESS
if (run != &ni->file.run) {
/* LZX or XPRESS */
- err = decompress_lzx_xpress(
- sbi, frame_ondisk + (vbo_disk & (PAGE_SIZE - 1)),
- ondisk_size, frame_mem, unc_size, frame_size);
+ err = decompress_lzx_xpress(sbi, frame_ondisk, ondisk_size,
+ frame_mem, unc_size, frame_size);
} else
#endif
{
memset(frame_mem + ok, 0, frame_size - ok);
}
- vunmap(frame_ondisk);
-
-out3:
- for (i = 0; i < npages_disk; i++) {
- pg = pages_disk[i];
- if (pg) {
- unlock_page(pg);
- put_page(pg);
- }
- }
- kfree(pages_disk);
-
out2:
+ kvfree(frame_ondisk);
+out1:
#ifdef CONFIG_NTFS3_LZX_XPRESS
if (run != &ni->file.run)
run_free(run);
+ if (!err && copy) {
+ /* We are called from 'ni_decompress_file' */
+ /* Copy decompressed LZX or XPRESS data into new place. */
+ down_read(&ni->file.run_lock);
+ err = ntfs_write_run(sbi, &ni->file.run, frame_mem, frame_vbo,
+ frame_size);
+ up_read(&ni->file.run_lock);
+ }
#endif
-out1:
vunmap(frame_mem);
out:
for (i = 0; i < pages_per_frame; i++) {
u64 frame_vbo = folio_pos(folio);
CLST frame = frame_vbo >> frame_bits;
char *frame_ondisk = NULL;
- struct page **pages_disk = NULL;
struct ATTR_LIST_ENTRY *le = NULL;
char *frame_mem;
struct ATTRIB *attr;
struct mft_inode *mi;
- u32 i;
- struct page *pg;
size_t compr_size, ondisk_size;
struct lznt *lznt;
goto out;
}
- pages_disk = kcalloc(pages_per_frame, sizeof(struct page *), GFP_NOFS);
- if (!pages_disk) {
- err = -ENOMEM;
- goto out;
- }
-
- for (i = 0; i < pages_per_frame; i++) {
- pg = alloc_page(GFP_KERNEL);
- if (!pg) {
- err = -ENOMEM;
- goto out1;
- }
- pages_disk[i] = pg;
- lock_page(pg);
- }
-
- /* To simplify compress algorithm do vmap for source and target pages. */
- frame_ondisk = vmap(pages_disk, pages_per_frame, VM_MAP, PAGE_KERNEL);
+ /* Allocate memory to write compressed data to. */
+ frame_ondisk = kvmalloc(frame_size, GFP_KERNEL);
if (!frame_ondisk) {
err = -ENOMEM;
- goto out1;
+ goto out;
}
/* Map in-memory frame for read-only. */
frame_mem = vmap(pages, pages_per_frame, VM_MAP, PAGE_KERNEL_RO);
if (!frame_mem) {
err = -ENOMEM;
- goto out2;
+ goto out1;
}
mutex_lock(&sbi->compress.mtx_lznt);
if (!lznt) {
mutex_unlock(&sbi->compress.mtx_lznt);
err = -ENOMEM;
- goto out3;
+ goto out2;
}
sbi->compress.lznt = lznt;
goto out2;
down_read(&ni->file.run_lock);
- err = ntfs_bio_pages(sbi, &ni->file.run,
- ondisk_size < frame_size ? pages_disk : pages,
- pages_per_frame, frame_vbo, ondisk_size,
- REQ_OP_WRITE);
+ err = ntfs_write_run(sbi, &ni->file.run,
+ ondisk_size < frame_size ? frame_ondisk :
+ frame_mem,
+ frame_vbo, ondisk_size);
up_read(&ni->file.run_lock);
-out3:
- vunmap(frame_mem);
out2:
- vunmap(frame_ondisk);
+ vunmap(frame_mem);
out1:
- for (i = 0; i < pages_per_frame; i++) {
- pg = pages_disk[i];
- if (pg) {
- unlock_page(pg);
- put_page(pg);
- }
- }
- kfree(pages_disk);
+ kvfree(frame_ondisk);
out:
return err;
}
}
/*
- * ntfs_bio_pages - Read/write pages from/to disk.
+ * ntfs_read_write_run - Read/Write disk's page cache.
*/
-int ntfs_bio_pages(struct ntfs_sb_info *sbi, const struct runs_tree *run,
- struct page **pages, u32 nr_pages, u64 vbo, u32 bytes,
- enum req_op op)
+int ntfs_read_write_run(struct ntfs_sb_info *sbi, const struct runs_tree *run,
+ void *buf, u64 vbo, size_t bytes, int wr)
{
- int err = 0;
- struct bio *new, *bio = NULL;
struct super_block *sb = sbi->sb;
- struct block_device *bdev = sb->s_bdev;
- struct page *page;
+ struct address_space *mapping = sb->s_bdev->bd_mapping;
u8 cluster_bits = sbi->cluster_bits;
- CLST lcn, clen, vcn, vcn_next;
- u32 add, off, page_idx;
+ CLST vcn_next, vcn = vbo >> cluster_bits;
+ CLST lcn, clen;
u64 lbo, len;
- size_t run_idx;
- struct blk_plug plug;
+ size_t idx;
+ u32 off, op;
+ struct folio *folio;
+ char *kaddr;
if (!bytes)
return 0;
- blk_start_plug(&plug);
+ if (!run_lookup_entry(run, vcn, &lcn, &clen, &idx))
+ return -ENOENT;
- /* Align vbo and bytes to be 512 bytes aligned. */
- lbo = (vbo + bytes + 511) & ~511ull;
- vbo = vbo & ~511ull;
- bytes = lbo - vbo;
+ if (lcn == SPARSE_LCN)
+ return -EINVAL;
- vcn = vbo >> cluster_bits;
- if (!run_lookup_entry(run, vcn, &lcn, &clen, &run_idx)) {
- err = -ENOENT;
- goto out;
- }
off = vbo & sbi->cluster_mask;
- page_idx = 0;
- page = pages[0];
+ lbo = ((u64)lcn << cluster_bits) + off;
+ len = ((u64)clen << cluster_bits) - off;
for (;;) {
- lbo = ((u64)lcn << cluster_bits) + off;
- len = ((u64)clen << cluster_bits) - off;
-new_bio:
- new = bio_alloc(bdev, nr_pages - page_idx, op, GFP_NOFS);
- if (bio) {
- bio_chain(bio, new);
- submit_bio(bio);
- }
- bio = new;
- bio->bi_iter.bi_sector = lbo >> 9;
+ /* Read range [lbo, lbo+len). */
+ folio = read_mapping_folio(mapping, lbo >> PAGE_SHIFT, NULL);
- while (len) {
- off = vbo & (PAGE_SIZE - 1);
- add = off + len > PAGE_SIZE ? (PAGE_SIZE - off) : len;
+ if (IS_ERR(folio))
+ return PTR_ERR(folio);
- if (bio_add_page(bio, page, add, off) < add)
- goto new_bio;
+ off = offset_in_page(lbo);
+ op = PAGE_SIZE - off;
- if (bytes <= add)
- goto out;
- bytes -= add;
- vbo += add;
+ if (op > len)
+ op = len;
+ if (op > bytes)
+ op = bytes;
- if (add + off == PAGE_SIZE) {
- page_idx += 1;
- if (WARN_ON(page_idx >= nr_pages)) {
- err = -EINVAL;
- goto out;
- }
- page = pages[page_idx];
- }
+ kaddr = kmap_local_folio(folio, 0);
+ if (wr) {
+ memcpy(kaddr + off, buf, op);
+ folio_mark_dirty(folio);
+ } else {
+ memcpy(buf, kaddr + off, op);
+ flush_dcache_folio(folio);
+ }
+ kunmap_local(kaddr);
+ folio_put(folio);
- if (len <= add)
- break;
- len -= add;
- lbo += add;
+ bytes -= op;
+ if (!bytes)
+ return 0;
+
+ buf += op;
+ len -= op;
+ if (len) {
+ /* next volume's page. */
+ lbo += op;
+ continue;
}
+ /* get next range. */
vcn_next = vcn + clen;
- if (!run_get_entry(run, ++run_idx, &vcn, &lcn, &clen) ||
+ if (!run_get_entry(run, ++idx, &vcn, &lcn, &clen) ||
vcn != vcn_next) {
- err = -ENOENT;
- goto out;
+ return -ENOENT;
}
- off = 0;
- }
-out:
- if (bio) {
- if (!err)
- err = submit_bio_wait(bio);
- bio_put(bio);
- }
- blk_finish_plug(&plug);
- return err;
+ if (lcn == SPARSE_LCN)
+ return -EINVAL;
+
+ lbo = ((u64)lcn << cluster_bits);
+ len = ((u64)clen << cluster_bits);
+ }
}
/*
int ni_readpage_cmpr(struct ntfs_inode *ni, struct folio *folio);
int ni_decompress_file(struct ntfs_inode *ni);
int ni_read_frame(struct ntfs_inode *ni, u64 frame_vbo, struct page **pages,
- u32 pages_per_frame);
+ u32 pages_per_frame, int copy);
int ni_write_frame(struct ntfs_inode *ni, struct page **pages,
u32 pages_per_frame);
int ni_remove_name(struct ntfs_inode *dir_ni, struct ntfs_inode *ni,
u32 bytes, struct ntfs_buffers *nb);
int ntfs_write_bh(struct ntfs_sb_info *sbi, struct NTFS_RECORD_HEADER *rhdr,
struct ntfs_buffers *nb, int sync);
-int ntfs_bio_pages(struct ntfs_sb_info *sbi, const struct runs_tree *run,
- struct page **pages, u32 nr_pages, u64 vbo, u32 bytes,
- enum req_op op);
+int ntfs_read_write_run(struct ntfs_sb_info *sbi, const struct runs_tree *run,
+ void *buf, u64 vbo, size_t bytes, int wr);
+static inline int ntfs_read_run(struct ntfs_sb_info *sbi,
+ const struct runs_tree *run, void *buf, u64 vbo,
+ size_t bytes)
+{
+ return ntfs_read_write_run(sbi, run, buf, vbo, bytes, 0);
+}
+static inline int ntfs_write_run(struct ntfs_sb_info *sbi,
+ const struct runs_tree *run, void *buf,
+ u64 vbo, size_t bytes)
+{
+ return ntfs_read_write_run(sbi, run, buf, vbo, bytes, 1);
+}
+
int ntfs_bio_fill_1(struct ntfs_sb_info *sbi, const struct runs_tree *run);
int ntfs_vbo_to_lbo(struct ntfs_sb_info *sbi, const struct runs_tree *run,
u64 vbo, u64 *lbo, u64 *bytes);
projects / thirdparty / kernel / stable.git / commitdiff
