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exfat: remove 'rwoffset' in exfat_inode_info

Browse source 
Remove 'rwoffset' in exfat_inode_info and replace it with the parameter of
exfat_readdir().
Since rwoffset is referenced only by exfat_readdir(), it is not necessary
a exfat_inode_info's member.
Also, change cpos to point to the next of entry-set, and return the index
of dir-entry via dir_entry->entry.

Signed-off-by: Tetsuhiro Kohada <kohada.t2@gmail.com>
Acked-by: Sungjong Seo <sj1557.seo@samsung.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
This commit is contained in:
Tetsuhiro Kohada 2020-09-25 08:50:00 +09:00 • committed by Namjae Jeon
commit 03b3db6894
5 changed files with 9 additions and 20 deletions
Download patch file Download diff file Expand all files Collapse all files

21
dir.c
View file

@ -60,9 +60,9 @@ static void exfat_get_uniname_from_ext_entry(struct super_block *sb,
}
/* read a directory entry from the opened directory */
static int exfat_readdir(struct inode *inode, struct exfat_dir_entry *dir_entry)
static int exfat_readdir(struct inode *inode, loff_t *cpos, struct exfat_dir_entry *dir_entry)
{
int i, dentries_per_clu, dentries_per_clu_bits = 0;
int i, dentries_per_clu, dentries_per_clu_bits = 0, num_ext;
unsigned int type, clu_offset;
sector_t sector;
struct exfat_chain dir, clu;
@ -71,7 +71,7 @@ static int exfat_readdir(struct inode *inode, struct exfat_dir_entry *dir_entry)
struct super_block *sb = inode->i_sb;
struct exfat_sb_info *sbi = EXFAT_SB(sb);
struct exfat_inode_info *ei = EXFAT_I(inode);
unsigned int dentry = ei->rwoffset & 0xFFFFFFFF;
unsigned int dentry = EXFAT_B_TO_DEN(*cpos) & 0xFFFFFFFF;
struct buffer_head *bh;
/* check if the given file ID is opened */
@ -128,6 +128,7 @@ static int exfat_readdir(struct inode *inode, struct exfat_dir_entry *dir_entry)
continue;
}
num_ext = ep->dentry.file.num_ext;
dir_entry->attr = le16_to_cpu(ep->dentry.file.attr);
exfat_get_entry_time(sbi, &dir_entry->crtime,
ep->dentry.file.create_tz,
@ -158,12 +159,13 @@ static int exfat_readdir(struct inode *inode, struct exfat_dir_entry *dir_entry)
return -EIO;
dir_entry->size =
le64_to_cpu(ep->dentry.stream.valid_size);
dir_entry->entry = dentry;
brelse(bh);
ei->hint_bmap.off = dentry >> dentries_per_clu_bits;
ei->hint_bmap.clu = clu.dir;
ei->rwoffset = ++dentry;
*cpos = EXFAT_DEN_TO_B(dentry + 1 + num_ext);
return 0;
}
@ -179,7 +181,7 @@ static int exfat_readdir(struct inode *inode, struct exfat_dir_entry *dir_entry)
}
dir_entry->namebuf.lfn[0] = '\0';
ei->rwoffset = dentry;
*cpos = EXFAT_DEN_TO_B(dentry);
return 0;
}
@ -243,12 +245,10 @@ static int exfat_iterate(struct file *filp, struct dir_context *ctx)
if (err)
goto unlock;
get_new:
ei->rwoffset = EXFAT_B_TO_DEN(cpos);
if (cpos >= i_size_read(inode))
goto end_of_dir;
err = exfat_readdir(inode, &de);
err = exfat_readdir(inode, &cpos, &de);
if (err) {
/*
* At least we tried to read a sector. Move cpos to next sector
@ -263,13 +263,10 @@ get_new:
goto end_of_dir;
}
cpos = EXFAT_DEN_TO_B(ei->rwoffset);
if (!nb->lfn[0])
goto end_of_dir;
i_pos = ((loff_t)ei->start_clu << 32) |
((ei->rwoffset - 1) & 0xffffffff);
i_pos = ((loff_t)ei->start_clu << 32) | (de.entry & 0xffffffff);
tmp = exfat_iget(sb, i_pos);
if (tmp) {
inum = tmp->i_ino;

2
exfat_fs.h
View file

@ -272,8 +272,6 @@ struct exfat_inode_info {
* the validation of hint_stat.
*/
unsigned int version;
/* file offset or dentry index for readdir */
loff_t rwoffset;
/* hint for cluster last accessed */
struct exfat_hint hint_bmap;

2
file.c
View file

@ -225,8 +225,6 @@ int __exfat_truncate(struct inode *inode, loff_t new_size)
/* hint information */
ei->hint_bmap.off = EXFAT_EOF_CLUSTER;
ei->hint_bmap.clu = EXFAT_EOF_CLUSTER;
if (ei->rwoffset > new_size)
ei->rwoffset = new_size;
/* hint_stat will be used if this is directory. */
ei->hint_stat.eidx = 0;

3
inode.c
View file

@ -116,8 +116,6 @@ static int exfat_map_cluster(struct inode *inode, unsigned int clu_offset,
unsigned int local_clu_offset = clu_offset;
unsigned int num_to_be_allocated = 0, num_clusters = 0;
ei->rwoffset = EXFAT_CLU_TO_B(clu_offset, sbi);
if (EXFAT_I(inode)->i_size_ondisk > 0)
num_clusters =
EXFAT_B_TO_CLU_ROUND_UP(EXFAT_I(inode)->i_size_ondisk,
@ -595,7 +593,6 @@ static int exfat_fill_inode(struct inode *inode, struct exfat_dir_entry *info)
ei->hint_stat.eidx = 0;
ei->hint_stat.clu = info->start_clu;
ei->hint_femp.eidx = EXFAT_HINT_NONE;
ei->rwoffset = 0;
ei->hint_bmap.off = EXFAT_EOF_CLUSTER;
ei->i_pos = 0;

1
super.c
View file

@ -577,7 +577,6 @@ static int exfat_read_root(struct inode *inode)
ei->flags = ALLOC_FAT_CHAIN;
ei->type = TYPE_DIR;
ei->version = 0;
ei->rwoffset = 0;
ei->hint_bmap.off = EXFAT_EOF_CLUSTER;
ei->hint_stat.eidx = 0;
ei->hint_stat.clu = sbi->root_dir;