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[readdir] introduce iterate_dir() and dir_context

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iterate_dir(): new helper, replacing vfs_readdir().

struct dir_context: contains the readdir callback (and will get more stuff
in it), embedded into whatever data that callback wants to deal with;
eventually, we'll be passing it to ->readdir() replacement instead of
(data,filldir) pair.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2013-05-15 13:52:59 -04:00
parent 83a8761142
commit 5c0ba4e076
10 changed files with 53 additions and 20 deletions
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4
arch/alpha/kernel/osf_sys.c
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@@ -96,6 +96,7 @@ struct osf_dirent {
};
struct osf_dirent_callback {
struct dir_context ctx;
struct osf_dirent __user *dirent;
long __user *basep;
unsigned int count;
@@ -155,8 +156,9 @@ SYSCALL_DEFINE4(osf_getdirentries, unsigned int, fd,
buf.basep = basep;
buf.count = count;
buf.error = 0;
buf.ctx.actor = osf_filldir;
error = vfs_readdir(arg.file, osf_filldir, &buf);
error = iterate_dir(arg.file, &buf.ctx);
if (error >= 0)
error = buf.error;
if (count != buf.count)