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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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21
fs/adfs/dir_fplus.c
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@@ -118,8 +118,29 @@ adfs_fplus_getnext(struct adfs_dir *dir, struct object_info *obj)
return 0;
}
static int adfs_fplus_iterate(struct adfs_dir *dir, struct dir_context *ctx)
{
struct object_info obj;
if ((ctx->pos - 2) >> 32)
return 0;
if (adfs_fplus_setpos(dir, ctx->pos - 2))
return 0;
while (!adfs_fplus_getnext(dir, &obj)) {
if (!dir_emit(ctx, obj.name, obj.name_len,
obj.indaddr, DT_UNKNOWN))
break;
ctx->pos++;
}
return 0;
}
const struct adfs_dir_ops adfs_fplus_dir_ops = {
.read = adfs_fplus_read,
.iterate = adfs_fplus_iterate,
.setpos = adfs_fplus_setpos,
.getnext = adfs_fplus_getnext,
};