[readdir] introduce iterate_dir() and dir_context
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>
diff --git a/fs/compat.c b/fs/compat.c
index fc3b55d..2279b59 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -832,6 +832,7 @@
};
struct compat_readdir_callback {
+ struct dir_context ctx;
struct compat_old_linux_dirent __user *dirent;
int result;
};
@@ -880,8 +881,9 @@
buf.result = 0;
buf.dirent = dirent;
+ buf.ctx.actor = compat_fillonedir;
- error = vfs_readdir(f.file, compat_fillonedir, &buf);
+ error = iterate_dir(f.file, &buf.ctx);
if (buf.result)
error = buf.result;
@@ -897,6 +899,7 @@
};
struct compat_getdents_callback {
+ struct dir_context ctx;
struct compat_linux_dirent __user *current_dir;
struct compat_linux_dirent __user *previous;
int count;
@@ -965,8 +968,9 @@
buf.previous = NULL;
buf.count = count;
buf.error = 0;
+ buf.ctx.actor = compat_filldir;
- error = vfs_readdir(f.file, compat_filldir, &buf);
+ error = iterate_dir(f.file, &buf.ctx);
if (error >= 0)
error = buf.error;
lastdirent = buf.previous;
@@ -983,6 +987,7 @@
#ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64
struct compat_getdents_callback64 {
+ struct dir_context ctx;
struct linux_dirent64 __user *current_dir;
struct linux_dirent64 __user *previous;
int count;
@@ -1050,8 +1055,9 @@
buf.previous = NULL;
buf.count = count;
buf.error = 0;
+ buf.ctx.actor = compat_filldir64;
- error = vfs_readdir(f.file, compat_filldir64, &buf);
+ error = iterate_dir(f.file, &buf.ctx);
if (error >= 0)
error = buf.error;
lastdirent = buf.previous;
diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c
index a7abbea..041379a 100644
--- a/fs/ecryptfs/file.c
+++ b/fs/ecryptfs/file.c
@@ -68,6 +68,7 @@
}
struct ecryptfs_getdents_callback {
+ struct dir_context ctx;
void *dirent;
struct dentry *dentry;
filldir_t filldir;
@@ -126,7 +127,8 @@
buf.filldir = filldir;
buf.filldir_called = 0;
buf.entries_written = 0;
- rc = vfs_readdir(lower_file, ecryptfs_filldir, (void *)&buf);
+ buf.ctx.actor = ecryptfs_filldir;
+ rc = iterate_dir(lower_file, &buf.ctx);
file->f_pos = lower_file->f_pos;
if (rc < 0)
goto out;
diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c
index 262fc99..7cb1904 100644
--- a/fs/exportfs/expfs.c
+++ b/fs/exportfs/expfs.c
@@ -212,6 +212,7 @@
}
struct getdents_callback {
+ struct dir_context ctx;
char *name; /* name that was found. It already points to a
buffer NAME_MAX+1 is size */
unsigned long ino; /* the inum we are looking for */
@@ -278,10 +279,11 @@
buffer.ino = child->d_inode->i_ino;
buffer.found = 0;
buffer.sequence = 0;
+ buffer.ctx.actor = filldir_one;
while (1) {
int old_seq = buffer.sequence;
- error = vfs_readdir(file, filldir_one, &buffer);
+ error = iterate_dir(file, &buffer.ctx);
if (buffer.found) {
error = 0;
break;
diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c
index 4e9a21d..4f8cc6b 100644
--- a/fs/nfsd/nfs4recover.c
+++ b/fs/nfsd/nfs4recover.c
@@ -263,7 +263,10 @@
{
const struct cred *original_cred;
struct dentry *dir = nn->rec_file->f_path.dentry;
- LIST_HEAD(names);
+ struct {
+ struct dir_context ctx;
+ struct list_head names;
+ } ctx;
int status;
status = nfs4_save_creds(&original_cred);
@@ -276,11 +279,13 @@
return status;
}
- status = vfs_readdir(nn->rec_file, nfsd4_build_namelist, &names);
+ INIT_LIST_HEAD(&ctx.names);
+ ctx.ctx.actor = nfsd4_build_namelist;
+ status = iterate_dir(nn->rec_file, &ctx.ctx);
mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_PARENT);
- while (!list_empty(&names)) {
+ while (!list_empty(&ctx.names)) {
struct name_list *entry;
- entry = list_entry(names.next, struct name_list, list);
+ entry = list_entry(ctx.names.next, struct name_list, list);
if (!status) {
struct dentry *dentry;
dentry = lookup_one_len(entry->name, dir, HEXDIR_LEN-1);
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 84ce601..f939ba9 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -1912,6 +1912,7 @@
};
struct readdir_data {
+ struct dir_context ctx;
char *dirent;
size_t used;
int full;
@@ -1949,6 +1950,7 @@
int size;
loff_t offset;
+ buf.ctx.actor = nfsd_buffered_filldir;
buf.dirent = (void *)__get_free_page(GFP_KERNEL);
if (!buf.dirent)
return nfserrno(-ENOMEM);
@@ -1963,7 +1965,7 @@
buf.used = 0;
buf.full = 0;
- host_err = vfs_readdir(file, nfsd_buffered_filldir, &buf);
+ host_err = iterate_dir(file, &buf.ctx);
if (buf.full)
host_err = 0;
diff --git a/fs/readdir.c b/fs/readdir.c
index fee38e0..5b620a2 100644
--- a/fs/readdir.c
+++ b/fs/readdir.c
@@ -20,7 +20,7 @@
#include <asm/uaccess.h>
-int vfs_readdir(struct file *file, filldir_t filler, void *buf)
+int iterate_dir(struct file *file, struct dir_context *ctx)
{
struct inode *inode = file_inode(file);
int res = -ENOTDIR;
@@ -37,15 +37,14 @@
res = -ENOENT;
if (!IS_DEADDIR(inode)) {
- res = file->f_op->readdir(file, buf, filler);
+ res = file->f_op->readdir(file, ctx, ctx->actor);
file_accessed(file);
}
mutex_unlock(&inode->i_mutex);
out:
return res;
}
-
-EXPORT_SYMBOL(vfs_readdir);
+EXPORT_SYMBOL(iterate_dir);
/*
* Traditional linux readdir() handling..
@@ -66,6 +65,7 @@
};
struct readdir_callback {
+ struct dir_context ctx;
struct old_linux_dirent __user * dirent;
int result;
};
@@ -73,7 +73,7 @@
static int fillonedir(void * __buf, const char * name, int namlen, loff_t offset,
u64 ino, unsigned int d_type)
{
- struct readdir_callback * buf = (struct readdir_callback *) __buf;
+ struct readdir_callback *buf = (struct readdir_callback *) __buf;
struct old_linux_dirent __user * dirent;
unsigned long d_ino;
@@ -112,10 +112,11 @@
if (!f.file)
return -EBADF;
+ buf.ctx.actor = fillonedir;
buf.result = 0;
buf.dirent = dirent;
- error = vfs_readdir(f.file, fillonedir, &buf);
+ error = iterate_dir(f.file, &buf.ctx);
if (buf.result)
error = buf.result;
@@ -137,6 +138,7 @@
};
struct getdents_callback {
+ struct dir_context ctx;
struct linux_dirent __user * current_dir;
struct linux_dirent __user * previous;
int count;
@@ -205,8 +207,9 @@
buf.previous = NULL;
buf.count = count;
buf.error = 0;
+ buf.ctx.actor = filldir;
- error = vfs_readdir(f.file, filldir, &buf);
+ error = iterate_dir(f.file, &buf.ctx);
if (error >= 0)
error = buf.error;
lastdirent = buf.previous;
@@ -221,6 +224,7 @@
}
struct getdents_callback64 {
+ struct dir_context ctx;
struct linux_dirent64 __user * current_dir;
struct linux_dirent64 __user * previous;
int count;
@@ -285,8 +289,9 @@
buf.previous = NULL;
buf.count = count;
buf.error = 0;
+ buf.ctx.actor = filldir64;
- error = vfs_readdir(f.file, filldir64, &buf);
+ error = iterate_dir(f.file, &buf.ctx);
if (error >= 0)
error = buf.error;
lastdirent = buf.previous;