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erofs_buf: store address_space instead of inode

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... seeing that ->i_mapping is the only thing we want from the inode.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2024-04-25 00:15:46 -04:00
parent 469ad583c1
commit 958b9f85f8
6 changed files with 9 additions and 10 deletions
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7
fs/erofs/data.c
View File

@ -32,7 +32,6 @@ void erofs_put_metabuf(struct erofs_buf *buf)
void *erofs_bread(struct erofs_buf *buf, erofs_off_t offset,
enum erofs_kmap_type type)
{
struct inode *inode = buf->inode;
pgoff_t index = offset >> PAGE_SHIFT;
struct page *page = buf->page;
struct folio *folio;
@ -42,7 +41,7 @@ void *erofs_bread(struct erofs_buf *buf, erofs_off_t offset,
erofs_put_metabuf(buf);
nofs_flag = memalloc_nofs_save();
folio = read_cache_folio(inode->i_mapping, index, NULL, NULL);
folio = read_cache_folio(buf->mapping, index, NULL, NULL);
memalloc_nofs_restore(nofs_flag);
if (IS_ERR(folio))
return folio;
@ -67,9 +66,9 @@ void *erofs_bread(struct erofs_buf *buf, erofs_off_t offset,
void erofs_init_metabuf(struct erofs_buf *buf, struct super_block *sb)
{
if (erofs_is_fscache_mode(sb))
buf->inode = EROFS_SB(sb)->s_fscache->inode;
buf->mapping = EROFS_SB(sb)->s_fscache->inode->i_mapping;
else
buf->inode = sb->s_bdev->bd_inode;
buf->mapping = sb->s_bdev->bd_inode->i_mapping;
}
void *erofs_read_metabuf(struct erofs_buf *buf, struct super_block *sb,

2
fs/erofs/dir.c
View File

@ -58,7 +58,7 @@ static int erofs_readdir(struct file *f, struct dir_context *ctx)
int err = 0;
bool initial = true;
buf.inode = dir;
buf.mapping = dir->i_mapping;
while (ctx->pos < dirsize) {
struct erofs_dirent *de;
unsigned int nameoff, maxsize;

2
fs/erofs/internal.h
View File

@ -223,7 +223,7 @@ enum erofs_kmap_type {
};
struct erofs_buf {
struct inode *inode;
struct address_space *mapping;
struct page *page;
void *base;
enum erofs_kmap_type kmap_type;

4
fs/erofs/namei.c
View File

@ -99,7 +99,7 @@ static void *erofs_find_target_block(struct erofs_buf *target,
struct erofs_buf buf = __EROFS_BUF_INITIALIZER;
struct erofs_dirent *de;
buf.inode = dir;
buf.mapping = dir->i_mapping;
de = erofs_bread(&buf, erofs_pos(dir->i_sb, mid), EROFS_KMAP);
if (!IS_ERR(de)) {
const int nameoff = nameoff_from_disk(de->nameoff, bsz);
@ -171,7 +171,7 @@ int erofs_namei(struct inode *dir, const struct qstr *name, erofs_nid_t *nid,
qn.name = name->name;
qn.end = name->name + name->len;
buf.inode = dir;
buf.mapping = dir->i_mapping;
ndirents = 0;
de = erofs_find_target_block(&buf, dir, &qn, &ndirents);

2
fs/erofs/xattr.c
View File

@ -483,7 +483,7 @@ int erofs_xattr_prefixes_init(struct super_block *sb)
return -ENOMEM;
if (sbi->packed_inode)
buf.inode = sbi->packed_inode;
buf.mapping = sbi->packed_inode->i_mapping;
else
erofs_init_metabuf(&buf, sb);

2
fs/erofs/zdata.c
View File

@ -936,7 +936,7 @@ static int z_erofs_read_fragment(struct super_block *sb, struct page *page,
if (!packed_inode)
return -EFSCORRUPTED;
buf.inode = packed_inode;
buf.mapping = packed_inode->i_mapping;
for (; cur < end; cur += cnt, pos += cnt) {
cnt = min_t(unsigned int, end - cur,
sb->s_blocksize - erofs_blkoff(sb, pos));