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fs/adfs: dir: add more efficient iterate() per-format method

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Rather than using setpos + getnext to iterate through the directory
entries, pass iterate() down to the dir format code to populate the
dirents.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Russell King
2019-12-09 11:10:16 +00:00
committed by Al Viro
parent cdc46e99e1
commit 4287e4deb1
4 changed files with 42 additions and 14 deletions
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16
fs/adfs/dir.c
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@@ -240,12 +240,8 @@ static int adfs_iterate(struct file *file, struct dir_context *ctx)
struct inode *inode = file_inode(file);
struct super_block *sb = inode->i_sb;
const struct adfs_dir_ops *ops = ADFS_SB(sb)->s_dir;
struct object_info obj;
struct adfs_dir dir;
int ret = 0;
if (ctx->pos >> 32)
return 0;
int ret;
down_read(&adfs_dir_rwsem);
ret = adfs_dir_read_inode(sb, inode, &dir);
@@ -263,15 +259,7 @@ static int adfs_iterate(struct file *file, struct dir_context *ctx)
ctx->pos = 2;
}
ret = ops->setpos(&dir, ctx->pos - 2);
if (ret)
goto unlock_relse;
while (ops->getnext(&dir, &obj) == 0) {
if (!dir_emit(ctx, obj.name, obj.name_len,
obj.indaddr, DT_UNKNOWN))
break;
ctx->pos++;
}
ret = ops->iterate(&dir, ctx);
unlock_relse:
up_read(&adfs_dir_rwsem);