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NFS: Additional refactoring for fs_context conversion

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Split out from commit "NFS: Add fs_context support."

This patch adds additional refactoring for the conversion of NFS to use
fs_context, namely:

 (*) Merge nfs_mount_info and nfs_clone_mount into nfs_fs_context.
     nfs_clone_mount has had several fields removed, and nfs_mount_info
     has been removed altogether.
 (*) Various functions now take an fs_context as an argument instead
     of nfs_mount_info, nfs_fs_context, etc.

Signed-off-by: Scott Mayhew <smayhew@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Scott Mayhew 2019-12-10 07:31:14 -05:00 • committed by Anna Schumaker
parent f2aedb713c
commit 62a55d088c
13 changed files with 203 additions and 272 deletions
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70
fs/nfs/getroot.c
View file

@ -64,66 +64,68 @@ static int nfs_superblock_set_dummy_root(struct super_block *sb, struct inode *i
/*
* get an NFS2/NFS3 root dentry from the root filehandle
*/
struct dentry *nfs_get_root(struct super_block *sb, struct nfs_fh *mntfh,
const char *devname)
int nfs_get_root(struct super_block *s, struct fs_context *fc)
{
struct nfs_server *server = NFS_SB(sb);
struct nfs_fs_context *ctx = nfs_fc2context(fc);
struct nfs_server *server = NFS_SB(s);
struct nfs_fsinfo fsinfo;
struct dentry *ret;
struct dentry *root;
struct inode *inode;
void *name = kstrdup(devname, GFP_KERNEL);
int error;
char *name;
int error = -ENOMEM;
name = kstrdup(fc->source, GFP_KERNEL);
if (!name)
return ERR_PTR(-ENOMEM);
goto out;
/* get the actual root for this mount */
fsinfo.fattr = nfs_alloc_fattr();
if (fsinfo.fattr == NULL) {
kfree(name);
return ERR_PTR(-ENOMEM);
}
if (fsinfo.fattr == NULL)
goto out_name;
error = server->nfs_client->rpc_ops->getroot(server, mntfh, &fsinfo);
error = server->nfs_client->rpc_ops->getroot(server, ctx->mntfh, &fsinfo);
if (error < 0) {
dprintk("nfs_get_root: getattr error = %d\n", -error);
ret = ERR_PTR(error);
goto out;
goto out_fattr;
}
inode = nfs_fhget(sb, mntfh, fsinfo.fattr, NULL);
inode = nfs_fhget(s, ctx->mntfh, fsinfo.fattr, NULL);
if (IS_ERR(inode)) {
dprintk("nfs_get_root: get root inode failed\n");
ret = ERR_CAST(inode);
goto out;
error = PTR_ERR(inode);
goto out_fattr;
}
error = nfs_superblock_set_dummy_root(sb, inode);
if (error != 0) {
ret = ERR_PTR(error);
goto out;
}
error = nfs_superblock_set_dummy_root(s, inode);
if (error != 0)
goto out_fattr;
/* root dentries normally start off anonymous and get spliced in later
* if the dentry tree reaches them; however if the dentry already
* exists, we'll pick it up at this point and use it as the root
*/
ret = d_obtain_root(inode);
if (IS_ERR(ret)) {
root = d_obtain_root(inode);
if (IS_ERR(root)) {
dprintk("nfs_get_root: get root dentry failed\n");
goto out;
error = PTR_ERR(root);
goto out_fattr;
}
security_d_instantiate(ret, inode);
spin_lock(&ret->d_lock);
if (IS_ROOT(ret) && !ret->d_fsdata &&
!(ret->d_flags & DCACHE_NFSFS_RENAMED)) {
ret->d_fsdata = name;
security_d_instantiate(root, inode);
spin_lock(&root->d_lock);
if (IS_ROOT(root) && !root->d_fsdata &&
!(root->d_flags & DCACHE_NFSFS_RENAMED)) {
root->d_fsdata = name;
name = NULL;
}
spin_unlock(&ret->d_lock);
out:
kfree(name);
spin_unlock(&root->d_lock);
fc->root = root;
error = 0;
out_fattr:
nfs_free_fattr(fsinfo.fattr);
return ret;
out_name:
kfree(name);
out:
return error;
}