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-rw-r--r--fs/kernfs/dir.c12
-rw-r--r--fs/kernfs/file.c78
-rw-r--r--fs/kernfs/inode.c8
-rw-r--r--fs/kernfs/kernfs-internal.h2
-rw-r--r--fs/kernfs/mount.c7
5 files changed, 49 insertions, 58 deletions
diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c
index 8b2bd65d70..62d39ecf0a 100644
--- a/fs/kernfs/dir.c
+++ b/fs/kernfs/dir.c
@@ -676,6 +676,18 @@ struct kernfs_node *kernfs_new_node(struct kernfs_node *parent,
{
struct kernfs_node *kn;
+ if (parent->mode & S_ISGID) {
+ /* this code block imitates inode_init_owner() for
+ * kernfs
+ */
+
+ if (parent->iattr)
+ gid = parent->iattr->ia_gid;
+
+ if (flags & KERNFS_DIR)
+ mode |= S_ISGID;
+ }
+
kn = __kernfs_new_node(kernfs_root(parent), parent,
name, mode, uid, gid, flags);
if (kn) {
diff --git a/fs/kernfs/file.c b/fs/kernfs/file.c
index 180906c36f..f0cb729e9a 100644
--- a/fs/kernfs/file.c
+++ b/fs/kernfs/file.c
@@ -429,60 +429,11 @@ static int kernfs_vma_access(struct vm_area_struct *vma, unsigned long addr,
return ret;
}
-#ifdef CONFIG_NUMA
-static int kernfs_vma_set_policy(struct vm_area_struct *vma,
- struct mempolicy *new)
-{
- struct file *file = vma->vm_file;
- struct kernfs_open_file *of = kernfs_of(file);
- int ret;
-
- if (!of->vm_ops)
- return 0;
-
- if (!kernfs_get_active(of->kn))
- return -EINVAL;
-
- ret = 0;
- if (of->vm_ops->set_policy)
- ret = of->vm_ops->set_policy(vma, new);
-
- kernfs_put_active(of->kn);
- return ret;
-}
-
-static struct mempolicy *kernfs_vma_get_policy(struct vm_area_struct *vma,
- unsigned long addr)
-{
- struct file *file = vma->vm_file;
- struct kernfs_open_file *of = kernfs_of(file);
- struct mempolicy *pol;
-
- if (!of->vm_ops)
- return vma->vm_policy;
-
- if (!kernfs_get_active(of->kn))
- return vma->vm_policy;
-
- pol = vma->vm_policy;
- if (of->vm_ops->get_policy)
- pol = of->vm_ops->get_policy(vma, addr);
-
- kernfs_put_active(of->kn);
- return pol;
-}
-
-#endif
-
static const struct vm_operations_struct kernfs_vm_ops = {
.open = kernfs_vma_open,
.fault = kernfs_vma_fault,
.page_mkwrite = kernfs_vma_page_mkwrite,
.access = kernfs_vma_access,
-#ifdef CONFIG_NUMA
- .set_policy = kernfs_vma_set_policy,
- .get_policy = kernfs_vma_get_policy,
-#endif
};
static int kernfs_fop_mmap(struct file *file, struct vm_area_struct *vma)
@@ -903,6 +854,33 @@ static __poll_t kernfs_fop_poll(struct file *filp, poll_table *wait)
return ret;
}
+static loff_t kernfs_fop_llseek(struct file *file, loff_t offset, int whence)
+{
+ struct kernfs_open_file *of = kernfs_of(file);
+ const struct kernfs_ops *ops;
+ loff_t ret;
+
+ /*
+ * @of->mutex nests outside active ref and is primarily to ensure that
+ * the ops aren't called concurrently for the same open file.
+ */
+ mutex_lock(&of->mutex);
+ if (!kernfs_get_active(of->kn)) {
+ mutex_unlock(&of->mutex);
+ return -ENODEV;
+ }
+
+ ops = kernfs_ops(of->kn);
+ if (ops->llseek)
+ ret = ops->llseek(of, offset, whence);
+ else
+ ret = generic_file_llseek(file, offset, whence);
+
+ kernfs_put_active(of->kn);
+ mutex_unlock(&of->mutex);
+ return ret;
+}
+
static void kernfs_notify_workfn(struct work_struct *work)
{
struct kernfs_node *kn;
@@ -1005,7 +983,7 @@ EXPORT_SYMBOL_GPL(kernfs_notify);
const struct file_operations kernfs_file_fops = {
.read_iter = kernfs_fop_read_iter,
.write_iter = kernfs_fop_write_iter,
- .llseek = generic_file_llseek,
+ .llseek = kernfs_fop_llseek,
.mmap = kernfs_fop_mmap,
.open = kernfs_fop_open,
.release = kernfs_fop_release,
diff --git a/fs/kernfs/inode.c b/fs/kernfs/inode.c
index 922719a343..b83054da68 100644
--- a/fs/kernfs/inode.c
+++ b/fs/kernfs/inode.c
@@ -151,7 +151,7 @@ ssize_t kernfs_iop_listxattr(struct dentry *dentry, char *buf, size_t size)
static inline void set_default_inode_attr(struct inode *inode, umode_t mode)
{
inode->i_mode = mode;
- inode->i_atime = inode->i_mtime = inode_set_ctime_current(inode);
+ simple_inode_init_ts(inode);
}
static inline void set_inode_attr(struct inode *inode,
@@ -159,8 +159,8 @@ static inline void set_inode_attr(struct inode *inode,
{
inode->i_uid = attrs->ia_uid;
inode->i_gid = attrs->ia_gid;
- inode->i_atime = attrs->ia_atime;
- inode->i_mtime = attrs->ia_mtime;
+ inode_set_atime_to_ts(inode, attrs->ia_atime);
+ inode_set_mtime_to_ts(inode, attrs->ia_mtime);
inode_set_ctime_to_ts(inode, attrs->ia_ctime);
}
@@ -445,7 +445,7 @@ static const struct xattr_handler kernfs_user_xattr_handler = {
.set = kernfs_vfs_user_xattr_set,
};
-const struct xattr_handler *kernfs_xattr_handlers[] = {
+const struct xattr_handler * const kernfs_xattr_handlers[] = {
&kernfs_trusted_xattr_handler,
&kernfs_security_xattr_handler,
&kernfs_user_xattr_handler,
diff --git a/fs/kernfs/kernfs-internal.h b/fs/kernfs/kernfs-internal.h
index a9b854cdfd..237f2764b9 100644
--- a/fs/kernfs/kernfs-internal.h
+++ b/fs/kernfs/kernfs-internal.h
@@ -127,7 +127,7 @@ extern struct kmem_cache *kernfs_node_cache, *kernfs_iattrs_cache;
/*
* inode.c
*/
-extern const struct xattr_handler *kernfs_xattr_handlers[];
+extern const struct xattr_handler * const kernfs_xattr_handlers[];
void kernfs_evict_inode(struct inode *inode);
int kernfs_iop_permission(struct mnt_idmap *idmap,
struct inode *inode, int mask);
diff --git a/fs/kernfs/mount.c b/fs/kernfs/mount.c
index c4bf26142e..4628edde2e 100644
--- a/fs/kernfs/mount.c
+++ b/fs/kernfs/mount.c
@@ -21,8 +21,9 @@
#include "kernfs-internal.h"
-struct kmem_cache *kernfs_node_cache, *kernfs_iattrs_cache;
-struct kernfs_global_locks *kernfs_locks;
+struct kmem_cache *kernfs_node_cache __ro_after_init;
+struct kmem_cache *kernfs_iattrs_cache __ro_after_init;
+struct kernfs_global_locks *kernfs_locks __ro_after_init;
static int kernfs_sop_show_options(struct seq_file *sf, struct dentry *dentry)
{
@@ -265,7 +266,7 @@ static int kernfs_fill_super(struct super_block *sb, struct kernfs_fs_context *k
sb->s_time_gran = 1;
/* sysfs dentries and inodes don't require IO to create */
- sb->s_shrink.seeks = 0;
+ sb->s_shrink->seeks = 0;
/* get root inode, initialize and unlock it */
down_read(&kf_root->kernfs_rwsem);