summaryrefslogtreecommitdiff
path: root/fs
diff options
context:
space:
mode:
Diffstat (limited to 'fs')
-rw-r--r--fs/exportfs/expfs.c179
-rw-r--r--fs/nfsd/export.c8
2 files changed, 3 insertions, 184 deletions
diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c
index 99294a23cd54..e68f0279f4b0 100644
--- a/fs/exportfs/expfs.c
+++ b/fs/exportfs/expfs.c
@@ -13,19 +13,6 @@ static int get_name(struct dentry *dentry, char *name,
struct dentry *child);
-static struct dentry *exportfs_get_dentry(struct super_block *sb, void *obj)
-{
- struct dentry *result = ERR_PTR(-ESTALE);
-
- if (sb->s_export_op->get_dentry) {
- result = sb->s_export_op->get_dentry(sb, obj);
- if (!result)
- result = ERR_PTR(-ESTALE);
- }
-
- return result;
-}
-
static int exportfs_get_name(struct dentry *dir, char *name,
struct dentry *child)
{
@@ -214,125 +201,6 @@ reconnect_path(struct super_block *sb, struct dentry *target_dir)
return 0;
}
-/**
- * find_exported_dentry - helper routine to implement export_operations->decode_fh
- * @sb: The &super_block identifying the filesystem
- * @obj: An opaque identifier of the object to be found - passed to
- * get_inode
- * @parent: An optional opqaue identifier of the parent of the object.
- * @acceptable: A function used to test possible &dentries to see if they are
- * acceptable
- * @context: A parameter to @acceptable so that it knows on what basis to
- * judge.
- *
- * find_exported_dentry is the central helper routine to enable file systems
- * to provide the decode_fh() export_operation. It's main task is to take
- * an &inode, find or create an appropriate &dentry structure, and possibly
- * splice this into the dcache in the correct place.
- *
- * The decode_fh() operation provided by the filesystem should call
- * find_exported_dentry() with the same parameters that it received except
- * that instead of the file handle fragment, pointers to opaque identifiers
- * for the object and optionally its parent are passed. The default decode_fh
- * routine passes one pointer to the start of the filehandle fragment, and
- * one 8 bytes into the fragment. It is expected that most filesystems will
- * take this approach, though the offset to the parent identifier may well be
- * different.
- *
- * find_exported_dentry() will call get_dentry to get an dentry pointer from
- * the file system. If any &dentry in the d_alias list is acceptable, it will
- * be returned. Otherwise find_exported_dentry() will attempt to splice a new
- * &dentry into the dcache using get_name() and get_parent() to find the
- * appropriate place.
- */
-
-struct dentry *
-find_exported_dentry(struct super_block *sb, void *obj, void *parent,
- int (*acceptable)(void *context, struct dentry *de),
- void *context)
-{
- struct dentry *result, *alias;
- int err = -ESTALE;
-
- /*
- * Attempt to find the inode.
- */
- result = exportfs_get_dentry(sb, obj);
- if (IS_ERR(result))
- return result;
-
- if (S_ISDIR(result->d_inode->i_mode)) {
- if (!(result->d_flags & DCACHE_DISCONNECTED)) {
- if (acceptable(context, result))
- return result;
- err = -EACCES;
- goto err_result;
- }
-
- err = reconnect_path(sb, result);
- if (err)
- goto err_result;
- } else {
- struct dentry *target_dir, *nresult;
- char nbuf[NAME_MAX+1];
-
- alias = find_acceptable_alias(result, acceptable, context);
- if (alias)
- return alias;
-
- if (parent == NULL)
- goto err_result;
-
- target_dir = exportfs_get_dentry(sb,parent);
- if (IS_ERR(target_dir)) {
- err = PTR_ERR(target_dir);
- goto err_result;
- }
-
- err = reconnect_path(sb, target_dir);
- if (err) {
- dput(target_dir);
- goto err_result;
- }
-
- /*
- * As we weren't after a directory, have one more step to go.
- */
- err = exportfs_get_name(target_dir, nbuf, result);
- if (!err) {
- mutex_lock(&target_dir->d_inode->i_mutex);
- nresult = lookup_one_len(nbuf, target_dir,
- strlen(nbuf));
- mutex_unlock(&target_dir->d_inode->i_mutex);
- if (!IS_ERR(nresult)) {
- if (nresult->d_inode) {
- dput(result);
- result = nresult;
- } else
- dput(nresult);
- }
- }
- dput(target_dir);
- }
-
- alias = find_acceptable_alias(result, acceptable, context);
- if (alias)
- return alias;
-
- /* drat - I just cannot find anything acceptable */
- dput(result);
- /* It might be justifiable to return ESTALE here,
- * but the filehandle at-least looks reasonable good
- * and it may just be a permission problem, so returning
- * -EACCESS is safer
- */
- return ERR_PTR(-EACCES);
-
- err_result:
- dput(result);
- return ERR_PTR(err);
-}
-
struct getdents_callback {
char *name; /* name that was found. It already points to a
buffer NAME_MAX+1 is size */
@@ -462,38 +330,6 @@ static int export_encode_fh(struct dentry *dentry, struct fid *fid,
return type;
}
-
-/**
- * export_decode_fh - default export_operations->decode_fh function
- * @sb: The superblock
- * @fh: pointer to the file handle fragment
- * @fh_len: length of file handle fragment
- * @acceptable: function for testing acceptability of dentrys
- * @context: context for @acceptable
- *
- * This is the default decode_fh() function.
- * a fileid_type of 1 indicates that the filehandlefragment
- * just contains an object identifier understood by get_dentry.
- * a fileid_type of 2 says that there is also a directory
- * identifier 8 bytes in to the filehandlefragement.
- */
-static struct dentry *export_decode_fh(struct super_block *sb, __u32 *fh, int fh_len,
- int fileid_type,
- int (*acceptable)(void *context, struct dentry *de),
- void *context)
-{
- __u32 parent[2];
- parent[0] = parent[1] = 0;
- if (fh_len < 2 || fileid_type > 2)
- return NULL;
- if (fileid_type == 2) {
- if (fh_len > 2) parent[0] = fh[2];
- if (fh_len > 3) parent[1] = fh[3];
- }
- return find_exported_dentry(sb, fh, parent,
- acceptable, context);
-}
-
int exportfs_encode_fh(struct dentry *dentry, struct fid *fid, int *max_len,
int connectable)
{
@@ -518,19 +354,6 @@ struct dentry *exportfs_decode_fh(struct vfsmount *mnt, struct fid *fid,
int err;
/*
- * Old way of doing things. Will go away soon.
- */
- if (!nop->fh_to_dentry) {
- if (nop->decode_fh) {
- return nop->decode_fh(mnt->mnt_sb, fid->raw, fh_len,
- fileid_type, acceptable, context);
- } else {
- return export_decode_fh(mnt->mnt_sb, fid->raw, fh_len,
- fileid_type, acceptable, context);
- }
- }
-
- /*
* Try to get any dentry for the given file handle from the filesystem.
*/
result = nop->fh_to_dentry(mnt->mnt_sb, fid, fh_len, fileid_type);
@@ -652,6 +475,4 @@ struct dentry *exportfs_decode_fh(struct vfsmount *mnt, struct fid *fid,
}
EXPORT_SYMBOL_GPL(exportfs_decode_fh);
-EXPORT_SYMBOL(find_exported_dentry);
-
MODULE_LICENSE("GPL");
diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index 04b266729802..66d0aeb32a47 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -386,15 +386,13 @@ static int check_export(struct inode *inode, int flags, unsigned char *uuid)
dprintk("exp_export: export of non-dev fs without fsid\n");
return -EINVAL;
}
- if (!inode->i_sb->s_export_op) {
+
+ if (!inode->i_sb->s_export_op ||
+ !inode->i_sb->s_export_op->fh_to_dentry) {
dprintk("exp_export: export of invalid fs type.\n");
return -EINVAL;
}
- /* Ok, we can export it */;
- if (!inode->i_sb->s_export_op->find_exported_dentry)
- inode->i_sb->s_export_op->find_exported_dentry =
- find_exported_dentry;
return 0;
}
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-19 13:33:47 +0000