- Use i_size instead of i_size_read() due to immutable fses;
- Get rid of an unneeded goto since erofs_fill_dentries() also works;
- Remove unnecessary lines.
Signed-off-by: Hongzhen Luo<hongz...@linux.alibaba.com>
---
fs/erofs/dir.c | 35 ++++++++++++-----------------------
fs/erofs/internal.h | 2 +-
2 files changed, 13 insertions(+), 24 deletions(-)
diff --git a/fs/erofs/dir.c b/fs/erofs/dir.c
index 2193a6710c8f..c3b90abdee37 100644
--- a/fs/erofs/dir.c
+++ b/fs/erofs/dir.c
@@ -8,19 +8,15 @@
static int erofs_fill_dentries(struct inode *dir, struct dir_context *ctx,
void *dentry_blk, struct erofs_dirent *de,
- unsigned int nameoff, unsigned int maxsize)
+ unsigned int nameoff0, unsigned int maxsize)
{
- const struct erofs_dirent *end = dentry_blk + nameoff;
+ const struct erofs_dirent *end = dentry_blk + nameoff0;
while (de < end) {
- const char *de_name;
+ unsigned char d_type = fs_ftype_to_dtype(de->file_type);
+ unsigned int nameoff = le16_to_cpu(de->nameoff);
+ const char *de_name = (char *)dentry_blk + nameoff;
unsigned int de_namelen;
- unsigned char d_type;
-
- d_type = fs_ftype_to_dtype(de->file_type);
-
- nameoff = le16_to_cpu(de->nameoff);
- de_name = (char *)dentry_blk + nameoff;
/* the last dirent in the block? */
if (de + 1 >= end)
@@ -52,21 +48,20 @@ static int erofs_readdir(struct file *f, struct dir_context
*ctx)
struct erofs_buf buf = __EROFS_BUF_INITIALIZER;
struct super_block *sb = dir->i_sb;
unsigned long bsz = sb->s_blocksize;
- const size_t dirsize = i_size_read(dir);
- unsigned int i = erofs_blknr(sb, ctx->pos);
unsigned int ofs = erofs_blkoff(sb, ctx->pos);
int err = 0;
bool initial = true;
buf.mapping = dir->i_mapping;
- while (ctx->pos < dirsize) {
+ while (ctx->pos < dir->i_size) {
+ erofs_off_t dbstart = ctx->pos - ofs;
struct erofs_dirent *de;
unsigned int nameoff, maxsize;
- de = erofs_bread(&buf, erofs_pos(sb, i), EROFS_KMAP);
+ de = erofs_bread(&buf, dbstart, EROFS_KMAP);
if (IS_ERR(de)) {
erofs_err(sb, "fail to readdir of logical block %u of nid
%llu",
- i, EROFS_I(dir)->nid);
+ erofs_blknr(sb, dbstart), EROFS_I(dir)->nid);
err = PTR_ERR(de);
break;
}
@@ -79,25 +74,19 @@ static int erofs_readdir(struct file *f, struct dir_context
*ctx)
break;
}
- maxsize = min_t(unsigned int, dirsize - ctx->pos + ofs, bsz);
-
+ maxsize = min_t(unsigned int, dir->i_size - dbstart, bsz);
/* search dirents at the arbitrary position */
if (initial) {
initial = false;
-
ofs = roundup(ofs, sizeof(struct erofs_dirent));
- ctx->pos = erofs_pos(sb, i) + ofs;
- if (ofs >= nameoff)
- goto skip_this;
+ ctx->pos = dbstart + ofs;
}
err = erofs_fill_dentries(dir, ctx, de, (void *)de + ofs,
nameoff, maxsize);
if (err)
break;
-skip_this:
- ctx->pos = erofs_pos(sb, i) + maxsize;
- ++i;
+ ctx->pos = dbstart + maxsize;
ofs = 0;
}
erofs_put_metabuf(&buf);
diff --git a/fs/erofs/internal.h b/fs/erofs/internal.h
index 736607675396..45dc15ebd870 100644
--- a/fs/erofs/internal.h
+++ b/fs/erofs/internal.h
@@ -220,7 +220,7 @@ struct erofs_buf {
};
#define __EROFS_BUF_INITIALIZER ((struct erofs_buf){ .page = NULL })
-#define erofs_blknr(sb, addr) ((addr) >> (sb)->s_blocksize_bits)
+#define erofs_blknr(sb, addr) ((erofs_blk_t)((addr) >>
(sb)->s_blocksize_bits))
#define erofs_blkoff(sb, addr) ((addr) & ((sb)->s_blocksize - 1))
#define erofs_pos(sb, blk) ((erofs_off_t)(blk) << (sb)->s_blocksize_bits)
#define erofs_iblks(i) (round_up((i)->i_size, i_blocksize(i)) >>
(i)->i_blkbits)
-- 2.43.5
