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-rw-r--r--fs/nfs/dir.c32
-rw-r--r--fs/nfs/getroot.c10
-rw-r--r--fs/nfs/inode.c9
-rw-r--r--fs/nfs/namespace.c17
-rw-r--r--fs/nfs/unlink.c2
5 files changed, 46 insertions, 24 deletions
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 996dd8989a91..d33da530097a 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -438,7 +438,7 @@ void nfs_prime_dcache(struct dentry *parent, struct nfs_entry *entry)
if (dentry == NULL)
return;
- dentry->d_op = NFS_PROTO(dir)->dentry_ops;
+ d_set_d_op(dentry, NFS_PROTO(dir)->dentry_ops);
inode = nfs_fhget(dentry->d_sb, entry->fh, entry->fattr);
if (IS_ERR(inode))
goto out;
@@ -938,7 +938,8 @@ static int nfs_check_verifier(struct inode *dir, struct dentry *dentry)
* component of the path.
* We check for this using LOOKUP_CONTINUE and LOOKUP_PARENT.
*/
-static inline unsigned int nfs_lookup_check_intent(struct nameidata *nd, unsigned int mask)
+static inline unsigned int nfs_lookup_check_intent(struct nameidata *nd,
+ unsigned int mask)
{
if (nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))
return 0;
@@ -1018,7 +1019,7 @@ int nfs_neg_need_reval(struct inode *dir, struct dentry *dentry,
* If the parent directory is seen to have changed, we throw out the
* cached dentry and do a new lookup.
*/
-static int nfs_lookup_revalidate(struct dentry * dentry, struct nameidata *nd)
+static int nfs_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
{
struct inode *dir;
struct inode *inode;
@@ -1027,6 +1028,9 @@ static int nfs_lookup_revalidate(struct dentry * dentry, struct nameidata *nd)
struct nfs_fattr *fattr = NULL;
int error;
+ if (nd->flags & LOOKUP_RCU)
+ return -ECHILD;
+
parent = dget_parent(dentry);
dir = parent->d_inode;
nfs_inc_stats(dir, NFSIOS_DENTRYREVALIDATE);
@@ -1117,7 +1121,7 @@ out_error:
/*
* This is called from dput() when d_count is going to 0.
*/
-static int nfs_dentry_delete(struct dentry *dentry)
+static int nfs_dentry_delete(const struct dentry *dentry)
{
dfprintk(VFS, "NFS: dentry_delete(%s/%s, %x)\n",
dentry->d_parent->d_name.name, dentry->d_name.name,
@@ -1188,7 +1192,7 @@ static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, stru
if (dentry->d_name.len > NFS_SERVER(dir)->namelen)
goto out;
- dentry->d_op = NFS_PROTO(dir)->dentry_ops;
+ d_set_d_op(dentry, NFS_PROTO(dir)->dentry_ops);
/*
* If we're doing an exclusive create, optimize away the lookup
@@ -1333,7 +1337,7 @@ static struct dentry *nfs_atomic_lookup(struct inode *dir, struct dentry *dentry
res = ERR_PTR(-ENAMETOOLONG);
goto out;
}
- dentry->d_op = NFS_PROTO(dir)->dentry_ops;
+ d_set_d_op(dentry, NFS_PROTO(dir)->dentry_ops);
/* Let vfs_create() deal with O_EXCL. Instantiate, but don't hash
* the dentry. */
@@ -1718,11 +1722,9 @@ static int nfs_unlink(struct inode *dir, struct dentry *dentry)
dfprintk(VFS, "NFS: unlink(%s/%ld, %s)\n", dir->i_sb->s_id,
dir->i_ino, dentry->d_name.name);
- spin_lock(&dcache_lock);
spin_lock(&dentry->d_lock);
- if (atomic_read(&dentry->d_count) > 1) {
+ if (dentry->d_count > 1) {
spin_unlock(&dentry->d_lock);
- spin_unlock(&dcache_lock);
/* Start asynchronous writeout of the inode */
write_inode_now(dentry->d_inode, 0);
error = nfs_sillyrename(dir, dentry);
@@ -1733,7 +1735,6 @@ static int nfs_unlink(struct inode *dir, struct dentry *dentry)
need_rehash = 1;
}
spin_unlock(&dentry->d_lock);
- spin_unlock(&dcache_lock);
error = nfs_safe_remove(dentry);
if (!error || error == -ENOENT) {
nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
@@ -1868,7 +1869,7 @@ static int nfs_rename(struct inode *old_dir, struct dentry *old_dentry,
dfprintk(VFS, "NFS: rename(%s/%s -> %s/%s, ct=%d)\n",
old_dentry->d_parent->d_name.name, old_dentry->d_name.name,
new_dentry->d_parent->d_name.name, new_dentry->d_name.name,
- atomic_read(&new_dentry->d_count));
+ new_dentry->d_count);
/*
* For non-directories, check whether the target is busy and if so,
@@ -1886,7 +1887,7 @@ static int nfs_rename(struct inode *old_dir, struct dentry *old_dentry,
rehash = new_dentry;
}
- if (atomic_read(&new_dentry->d_count) > 2) {
+ if (new_dentry->d_count > 2) {
int err;
/* copy the target dentry's name */
@@ -2188,11 +2189,14 @@ int nfs_may_open(struct inode *inode, struct rpc_cred *cred, int openflags)
return nfs_do_access(inode, cred, nfs_open_permission_mask(openflags));
}
-int nfs_permission(struct inode *inode, int mask)
+int nfs_permission(struct inode *inode, int mask, unsigned int flags)
{
struct rpc_cred *cred;
int res = 0;
+ if (flags & IPERM_FLAG_RCU)
+ return -ECHILD;
+
nfs_inc_stats(inode, NFSIOS_VFSACCESS);
if ((mask & (MAY_READ | MAY_WRITE | MAY_EXEC)) == 0)
@@ -2240,7 +2244,7 @@ out:
out_notsup:
res = nfs_revalidate_inode(NFS_SERVER(inode), inode);
if (res == 0)
- res = generic_permission(inode, mask, NULL);
+ res = generic_permission(inode, mask, flags, NULL);
goto out;
}
diff --git a/fs/nfs/getroot.c b/fs/nfs/getroot.c
index ac7b814ce162..5596c6a2881e 100644
--- a/fs/nfs/getroot.c
+++ b/fs/nfs/getroot.c
@@ -63,9 +63,11 @@ static int nfs_superblock_set_dummy_root(struct super_block *sb, struct inode *i
* This again causes shrink_dcache_for_umount_subtree() to
* Oops, since the test for IS_ROOT() will fail.
*/
- spin_lock(&dcache_lock);
+ spin_lock(&sb->s_root->d_inode->i_lock);
+ spin_lock(&sb->s_root->d_lock);
list_del_init(&sb->s_root->d_alias);
- spin_unlock(&dcache_lock);
+ spin_unlock(&sb->s_root->d_lock);
+ spin_unlock(&sb->s_root->d_inode->i_lock);
}
return 0;
}
@@ -119,7 +121,7 @@ struct dentry *nfs_get_root(struct super_block *sb, struct nfs_fh *mntfh)
security_d_instantiate(ret, inode);
if (ret->d_op == NULL)
- ret->d_op = server->nfs_client->rpc_ops->dentry_ops;
+ d_set_d_op(ret, server->nfs_client->rpc_ops->dentry_ops);
out:
nfs_free_fattr(fsinfo.fattr);
return ret;
@@ -226,7 +228,7 @@ struct dentry *nfs4_get_root(struct super_block *sb, struct nfs_fh *mntfh)
security_d_instantiate(ret, inode);
if (ret->d_op == NULL)
- ret->d_op = server->nfs_client->rpc_ops->dentry_ops;
+ d_set_d_op(ret, server->nfs_client->rpc_ops->dentry_ops);
out:
nfs_free_fattr(fattr);
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index e67e31c73416..017daa3bed38 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -1438,11 +1438,18 @@ struct inode *nfs_alloc_inode(struct super_block *sb)
return &nfsi->vfs_inode;
}
-void nfs_destroy_inode(struct inode *inode)
+static void nfs_i_callback(struct rcu_head *head)
{
+ struct inode *inode = container_of(head, struct inode, i_rcu);
+ INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
}
+void nfs_destroy_inode(struct inode *inode)
+{
+ call_rcu(&inode->i_rcu, nfs_i_callback);
+}
+
static inline void nfs4_init_once(struct nfs_inode *nfsi)
{
#ifdef CONFIG_NFS_V4
diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c
index db6aa3673cf3..74aaf3963c10 100644
--- a/fs/nfs/namespace.c
+++ b/fs/nfs/namespace.c
@@ -49,12 +49,17 @@ char *nfs_path(const char *base,
const struct dentry *dentry,
char *buffer, ssize_t buflen)
{
- char *end = buffer+buflen;
+ char *end;
int namelen;
+ unsigned seq;
+rename_retry:
+ end = buffer+buflen;
*--end = '\0';
buflen--;
- spin_lock(&dcache_lock);
+
+ seq = read_seqbegin(&rename_lock);
+ rcu_read_lock();
while (!IS_ROOT(dentry) && dentry != droot) {
namelen = dentry->d_name.len;
buflen -= namelen + 1;
@@ -65,7 +70,9 @@ char *nfs_path(const char *base,
*--end = '/';
dentry = dentry->d_parent;
}
- spin_unlock(&dcache_lock);
+ rcu_read_unlock();
+ if (read_seqretry(&rename_lock, seq))
+ goto rename_retry;
if (*end != '/') {
if (--buflen < 0)
goto Elong;
@@ -82,7 +89,9 @@ char *nfs_path(const char *base,
memcpy(end, base, namelen);
return end;
Elong_unlock:
- spin_unlock(&dcache_lock);
+ rcu_read_unlock();
+ if (read_seqretry(&rename_lock, seq))
+ goto rename_retry;
Elong:
return ERR_PTR(-ENAMETOOLONG);
}
diff --git a/fs/nfs/unlink.c b/fs/nfs/unlink.c
index 7bdec8531400..8fe9eb47a97f 100644
--- a/fs/nfs/unlink.c
+++ b/fs/nfs/unlink.c
@@ -496,7 +496,7 @@ nfs_sillyrename(struct inode *dir, struct dentry *dentry)
dfprintk(VFS, "NFS: silly-rename(%s/%s, ct=%d)\n",
dentry->d_parent->d_name.name, dentry->d_name.name,
- atomic_read(&dentry->d_count));
+ dentry->d_count);
nfs_inc_stats(dir, NFSIOS_SILLYRENAME);
/*
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-28 01:52:39 +0100