On 09.03.21 16:53, Christoph Hellwig wrote:

Add a new alloc_anon_inode helper that allocates an inode on the anon_inode file system.

Signed-off-by: Christoph Hellwig hch@lst.de

fs/anon_inodes.c | 15 +++++++++++++-- include/linux/anon_inodes.h | 1 + 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/fs/anon_inodes.c b/fs/anon_inodes.c index 4745fc37014332..b6a8ea71920bc3 100644 --- a/fs/anon_inodes.c +++ b/fs/anon_inodes.c @@ -63,7 +63,7 @@ static struct inode *anon_inode_make_secure_inode( const struct qstr qname = QSTR_INIT(name, strlen(name)); int error;

• inode = alloc_anon_inode_sb(anon_inode_mnt->mnt_sb);

• inode = alloc_anon_inode(); if (IS_ERR(inode)) return inode; inode->i_flags &= ~S_PRIVATE;

@@ -225,13 +225,24 @@ int anon_inode_getfd_secure(const char *name, const struct file_operations *fops } EXPORT_SYMBOL_GPL(anon_inode_getfd_secure);

+/**

• • alloc_anon_inode - create a new anonymous inode
• • Create an inode on the anon_inode file system and return it.
• */

+struct inode *alloc_anon_inode(void) +{

• return alloc_anon_inode_sb(anon_inode_mnt->mnt_sb);

+} +EXPORT_SYMBOL_GPL(alloc_anon_inode);

• static int __init anon_inode_init(void) { anon_inode_mnt = kern_mount(&anon_inode_fs_type); if (IS_ERR(anon_inode_mnt)) panic("anon_inode_init() kernel mount failed (%ld)\n", PTR_ERR(anon_inode_mnt));

• anon_inode_inode = alloc_anon_inode_sb(anon_inode_mnt->mnt_sb);

• anon_inode_inode = alloc_anon_inode(); if (IS_ERR(anon_inode_inode)) panic("anon_inode_init() inode allocation failed (%ld)\n", PTR_ERR(anon_inode_inode));

diff --git a/include/linux/anon_inodes.h b/include/linux/anon_inodes.h index 71881a2b6f7860..b5ae9a6eda9923 100644 --- a/include/linux/anon_inodes.h +++ b/include/linux/anon_inodes.h @@ -21,6 +21,7 @@ int anon_inode_getfd_secure(const char *name, const struct file_operations *fops, void *priv, int flags, const struct inode *context_inode); +struct inode *alloc_anon_inode(void);

#endif /* _LINUX_ANON_INODES_H */

Reviewed-by: David Hildenbrand david@redhat.com