exfat: remove 'rwoffset' in exfat_inode_info

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>

diff --git a/fs/exfat/dir.c b/fs/exfat/dir.c
index 5fa7519..9167970 100644 (file)
--- a/fs/exfat/dir.c
+++ b/fs/exfat/dir.c
@@ -59,9 +59,9 @@ 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;
@@ -70,7 +70,7 @@ 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 */
@@ -127,6 +127,7 @@ 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,
@@ -157,12 +158,13 @@ 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;
                }
 
@@ -178,7 +180,7 @@ 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;
 }
 
@@ -242,12 +244,10 @@ 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
@@ -262,13 +262,10 @@ 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;

diff --git a/fs/exfat/exfat_fs.h b/fs/exfat/exfat_fs.h
index 49af036..b8f0e82 100644 (file)
--- a/fs/exfat/exfat_fs.h
+++ b/fs/exfat/exfat_fs.h
@@ -265,8 +265,6 @@ 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;

diff --git a/fs/exfat/file.c b/fs/exfat/file.c
index 4831a39..a92478e 100644 (file)
--- a/fs/exfat/file.c
+++ b/fs/exfat/file.c
@@ -208,8 +208,6 @@ 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;

diff --git a/fs/exfat/inode.c b/fs/exfat/inode.c
index 109f9b4..730373e 100644 (file)
--- a/fs/exfat/inode.c
+++ b/fs/exfat/inode.c
@@ -114,8 +114,6 @@ 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,
@@ -567,7 +565,6 @@ 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;
 

diff --git a/fs/exfat/super.c b/fs/exfat/super.c
index 60b941b..3ffdce5 100644 (file)
--- a/fs/exfat/super.c
+++ b/fs/exfat/super.c
@@ -342,7 +342,6 @@ 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;