Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 300 insertions, 0 deletions

diff --git a/fs/internal.h b/fs/internal.h
new file mode 100644
index 0000000000..d64ae03998
--- /dev/null
+++ b/fs/internal.h
@@ -0,0 +1,300 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* fs/ internal definitions
+ *
+ * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ */
+
+struct super_block;
+struct file_system_type;
+struct iomap;
+struct iomap_ops;
+struct linux_binprm;
+struct path;
+struct mount;
+struct shrink_control;
+struct fs_context;
+struct pipe_inode_info;
+struct iov_iter;
+struct mnt_idmap;
+
+/*
+ * block/bdev.c
+ */
+#ifdef CONFIG_BLOCK
+extern void __init bdev_cache_init(void);
+#else
+static inline void bdev_cache_init(void)
+{
+}
+#endif /* CONFIG_BLOCK */
+
+/*
+ * buffer.c
+ */
+int __block_write_begin_int(struct folio *folio, loff_t pos, unsigned len,
+		get_block_t *get_block, const struct iomap *iomap);
+
+/*
+ * char_dev.c
+ */
+extern void __init chrdev_init(void);
+
+/*
+ * fs_context.c
+ */
+extern const struct fs_context_operations legacy_fs_context_ops;
+extern int parse_monolithic_mount_data(struct fs_context *, void *);
+extern void vfs_clean_context(struct fs_context *fc);
+extern int finish_clean_context(struct fs_context *fc);
+
+/*
+ * namei.c
+ */
+extern int filename_lookup(int dfd, struct filename *name, unsigned flags,
+			   struct path *path, struct path *root);
+int do_rmdir(int dfd, struct filename *name);
+int do_unlinkat(int dfd, struct filename *name);
+int may_linkat(struct mnt_idmap *idmap, const struct path *link);
+int do_renameat2(int olddfd, struct filename *oldname, int newdfd,
+		 struct filename *newname, unsigned int flags);
+int do_mkdirat(int dfd, struct filename *name, umode_t mode);
+int do_symlinkat(struct filename *from, int newdfd, struct filename *to);
+int do_linkat(int olddfd, struct filename *old, int newdfd,
+			struct filename *new, int flags);
+
+/*
+ * namespace.c
+ */
+extern struct vfsmount *lookup_mnt(const struct path *);
+extern int finish_automount(struct vfsmount *, const struct path *);
+
+extern int sb_prepare_remount_readonly(struct super_block *);
+
+extern void __init mnt_init(void);
+
+extern int __mnt_want_write_file(struct file *);
+extern void __mnt_drop_write_file(struct file *);
+
+extern void dissolve_on_fput(struct vfsmount *);
+extern bool may_mount(void);
+
+int path_mount(const char *dev_name, struct path *path,
+		const char *type_page, unsigned long flags, void *data_page);
+int path_umount(struct path *path, int flags);
+
+/*
+ * fs_struct.c
+ */
+extern void chroot_fs_refs(const struct path *, const struct path *);
+
+/*
+ * file_table.c
+ */
+struct file *alloc_empty_file(int flags, const struct cred *cred);
+struct file *alloc_empty_file_noaccount(int flags, const struct cred *cred);
+struct file *alloc_empty_backing_file(int flags, const struct cred *cred);
+
+static inline void put_file_access(struct file *file)
+{
+	if ((file->f_mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ) {
+		i_readcount_dec(file->f_inode);
+	} else if (file->f_mode & FMODE_WRITER) {
+		put_write_access(file->f_inode);
+		__mnt_drop_write(file->f_path.mnt);
+	}
+}
+
+/*
+ * super.c
+ */
+extern int reconfigure_super(struct fs_context *);
+extern bool super_trylock_shared(struct super_block *sb);
+struct super_block *user_get_super(dev_t, bool excl);
+void put_super(struct super_block *sb);
+extern bool mount_capable(struct fs_context *);
+int sb_init_dio_done_wq(struct super_block *sb);
+
+/*
+ * Prepare superblock for changing its read-only state (i.e., either remount
+ * read-write superblock read-only or vice versa). After this function returns
+ * mnt_is_readonly() will return true for any mount of the superblock if its
+ * caller is able to observe any changes done by the remount. This holds until
+ * sb_end_ro_state_change() is called.
+ */
+static inline void sb_start_ro_state_change(struct super_block *sb)
+{
+	WRITE_ONCE(sb->s_readonly_remount, 1);
+	/*
+	 * For RO->RW transition, the barrier pairs with the barrier in
+	 * mnt_is_readonly() making sure if mnt_is_readonly() sees SB_RDONLY
+	 * cleared, it will see s_readonly_remount set.
+	 * For RW->RO transition, the barrier pairs with the barrier in
+	 * __mnt_want_write() before the mnt_is_readonly() check. The barrier
+	 * makes sure if __mnt_want_write() sees MNT_WRITE_HOLD already
+	 * cleared, it will see s_readonly_remount set.
+	 */
+	smp_wmb();
+}
+
+/*
+ * Ends section changing read-only state of the superblock. After this function
+ * returns if mnt_is_readonly() returns false, the caller will be able to
+ * observe all the changes remount did to the superblock.
+ */
+static inline void sb_end_ro_state_change(struct super_block *sb)
+{
+	/*
+	 * This barrier provides release semantics that pairs with
+	 * the smp_rmb() acquire semantics in mnt_is_readonly().
+	 * This barrier pair ensure that when mnt_is_readonly() sees
+	 * 0 for sb->s_readonly_remount, it will also see all the
+	 * preceding flag changes that were made during the RO state
+	 * change.
+	 */
+	smp_wmb();
+	WRITE_ONCE(sb->s_readonly_remount, 0);
+}
+
+/*
+ * open.c
+ */
+struct open_flags {
+	int open_flag;
+	umode_t mode;
+	int acc_mode;
+	int intent;
+	int lookup_flags;
+};
+extern struct file *do_filp_open(int dfd, struct filename *pathname,
+		const struct open_flags *op);
+extern struct file *do_file_open_root(const struct path *,
+		const char *, const struct open_flags *);
+extern struct open_how build_open_how(int flags, umode_t mode);
+extern int build_open_flags(const struct open_how *how, struct open_flags *op);
+extern struct file *__close_fd_get_file(unsigned int fd);
+
+long do_sys_ftruncate(unsigned int fd, loff_t length, int small);
+int chmod_common(const struct path *path, umode_t mode);
+int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group,
+		int flag);
+int chown_common(const struct path *path, uid_t user, gid_t group);
+extern int vfs_open(const struct path *, struct file *);
+
+/*
+ * inode.c
+ */
+extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
+int dentry_needs_remove_privs(struct mnt_idmap *, struct dentry *dentry);
+bool in_group_or_capable(struct mnt_idmap *idmap,
+			 const struct inode *inode, vfsgid_t vfsgid);
+void lock_two_inodes(struct inode *inode1, struct inode *inode2,
+		     unsigned subclass1, unsigned subclass2);
+
+/*
+ * fs-writeback.c
+ */
+extern long get_nr_dirty_inodes(void);
+void invalidate_inodes(struct super_block *sb);
+
+/*
+ * dcache.c
+ */
+extern int d_set_mounted(struct dentry *dentry);
+extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
+extern struct dentry *d_alloc_cursor(struct dentry *);
+extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *);
+extern char *simple_dname(struct dentry *, char *, int);
+extern void dput_to_list(struct dentry *, struct list_head *);
+extern void shrink_dentry_list(struct list_head *);
+
+/*
+ * pipe.c
+ */
+extern const struct file_operations pipefifo_fops;
+
+/*
+ * fs_pin.c
+ */
+extern void group_pin_kill(struct hlist_head *p);
+extern void mnt_pin_kill(struct mount *m);
+
+/*
+ * fs/nsfs.c
+ */
+extern const struct dentry_operations ns_dentry_operations;
+
+/*
+ * fs/stat.c:
+ */
+
+int getname_statx_lookup_flags(int flags);
+int do_statx(int dfd, struct filename *filename, unsigned int flags,
+	     unsigned int mask, struct statx __user *buffer);
+
+/*
+ * fs/splice.c:
+ */
+long splice_file_to_pipe(struct file *in,
+			 struct pipe_inode_info *opipe,
+			 loff_t *offset,
+			 size_t len, unsigned int flags);
+
+/*
+ * fs/xattr.c:
+ */
+struct xattr_name {
+	char name[XATTR_NAME_MAX + 1];
+};
+
+struct xattr_ctx {
+	/* Value of attribute */
+	union {
+		const void __user *cvalue;
+		void __user *value;
+	};
+	void *kvalue;
+	size_t size;
+	/* Attribute name */
+	struct xattr_name *kname;
+	unsigned int flags;
+};
+
+
+ssize_t do_getxattr(struct mnt_idmap *idmap,
+		    struct dentry *d,
+		    struct xattr_ctx *ctx);
+
+int setxattr_copy(const char __user *name, struct xattr_ctx *ctx);
+int do_setxattr(struct mnt_idmap *idmap, struct dentry *dentry,
+		struct xattr_ctx *ctx);
+int may_write_xattr(struct mnt_idmap *idmap, struct inode *inode);
+
+#ifdef CONFIG_FS_POSIX_ACL
+int do_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+	       const char *acl_name, const void *kvalue, size_t size);
+ssize_t do_get_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+		   const char *acl_name, void *kvalue, size_t size);
+#else
+static inline int do_set_acl(struct mnt_idmap *idmap,
+			     struct dentry *dentry, const char *acl_name,
+			     const void *kvalue, size_t size)
+{
+	return -EOPNOTSUPP;
+}
+static inline ssize_t do_get_acl(struct mnt_idmap *idmap,
+				 struct dentry *dentry, const char *acl_name,
+				 void *kvalue, size_t size)
+{
+	return -EOPNOTSUPP;
+}
+#endif
+
+ssize_t __kernel_write_iter(struct file *file, struct iov_iter *from, loff_t *pos);
+
+/*
+ * fs/attr.c
+ */
+struct mnt_idmap *alloc_mnt_idmap(struct user_namespace *mnt_userns);
+struct mnt_idmap *mnt_idmap_get(struct mnt_idmap *idmap);
+void mnt_idmap_put(struct mnt_idmap *idmap);