/* File supports async buffered reads */
#define FMODE_BUF_RASYNC ((__force fmode_t)0x40000000)
+/* File supports async nowait buffered writes */
+#define FMODE_BUF_WASYNC ((__force fmode_t)0x80000000)
+
/*
* Attribute flags. These should be or-ed together to figure out what
* has been changed!
struct iattr {
unsigned int ia_valid;
umode_t ia_mode;
- kuid_t ia_uid;
- kgid_t ia_gid;
+ /*
+ * The two anonymous unions wrap structures with the same member.
+ *
+ * Filesystems raising FS_ALLOW_IDMAP need to use ia_vfs{g,u}id which
+ * are a dedicated type requiring the filesystem to use the dedicated
+ * helpers. Other filesystem can continue to use ia_{g,u}id until they
+ * have been ported.
+ *
+ * They always contain the same value. In other words FS_ALLOW_IDMAP
+ * pass down the same value on idmapped mounts as they would on regular
+ * mounts.
+ */
+ union {
+ kuid_t ia_uid;
+ vfsuid_t ia_vfsuid;
+ };
+ union {
+ kgid_t ia_gid;
+ vfsgid_t ia_vfsgid;
+ };
loff_t ia_size;
struct timespec64 ia_atime;
struct timespec64 ia_mtime;
void (*free_folio)(struct folio *folio);
ssize_t (*direct_IO)(struct kiocb *, struct iov_iter *iter);
/*
- * migrate the contents of a page to the specified target. If
+ * migrate the contents of a folio to the specified target. If
* migrate_mode is MIGRATE_ASYNC, it must not block.
*/
- int (*migratepage) (struct address_space *,
- struct page *, struct page *, enum migrate_mode);
- bool (*isolate_page)(struct page *, isolate_mode_t);
- void (*putback_page)(struct page *);
+ int (*migrate_folio)(struct address_space *, struct folio *dst,
+ struct folio *src, enum migrate_mode);
int (*launder_folio)(struct folio *);
bool (*is_partially_uptodate) (struct folio *, size_t from,
size_t count);
* @mnt_userns: user namespace of the mount the inode was found from
* @inode: inode to map
*
+ * Note, this will eventually be removed completely in favor of the type-safe
+ * i_uid_into_vfsuid().
+ *
* Return: the inode's i_uid mapped down according to @mnt_userns.
* If the inode's i_uid has no mapping INVALID_UID is returned.
*/
static inline kuid_t i_uid_into_mnt(struct user_namespace *mnt_userns,
const struct inode *inode)
{
- return mapped_kuid_fs(mnt_userns, i_user_ns(inode), inode->i_uid);
+ return AS_KUIDT(make_vfsuid(mnt_userns, i_user_ns(inode), inode->i_uid));
+}
+
+/**
+ * i_uid_into_vfsuid - map an inode's i_uid down into a mnt_userns
+ * @mnt_userns: user namespace of the mount the inode was found from
+ * @inode: inode to map
+ *
+ * Return: whe inode's i_uid mapped down according to @mnt_userns.
+ * If the inode's i_uid has no mapping INVALID_VFSUID is returned.
+ */
+static inline vfsuid_t i_uid_into_vfsuid(struct user_namespace *mnt_userns,
+ const struct inode *inode)
+{
+ return make_vfsuid(mnt_userns, i_user_ns(inode), inode->i_uid);
+}
+
+/**
+ * i_uid_needs_update - check whether inode's i_uid needs to be updated
+ * @mnt_userns: user namespace of the mount the inode was found from
+ * @attr: the new attributes of @inode
+ * @inode: the inode to update
+ *
+ * Check whether the $inode's i_uid field needs to be updated taking idmapped
+ * mounts into account if the filesystem supports it.
+ *
+ * Return: true if @inode's i_uid field needs to be updated, false if not.
+ */
+static inline bool i_uid_needs_update(struct user_namespace *mnt_userns,
+ const struct iattr *attr,
+ const struct inode *inode)
+{
+ return ((attr->ia_valid & ATTR_UID) &&
+ !vfsuid_eq(attr->ia_vfsuid,
+ i_uid_into_vfsuid(mnt_userns, inode)));
+}
+
+/**
+ * i_uid_update - update @inode's i_uid field
+ * @mnt_userns: user namespace of the mount the inode was found from
+ * @attr: the new attributes of @inode
+ * @inode: the inode to update
+ *
+ * Safely update @inode's i_uid field translating the vfsuid of any idmapped
+ * mount into the filesystem kuid.
+ */
+static inline void i_uid_update(struct user_namespace *mnt_userns,
+ const struct iattr *attr,
+ struct inode *inode)
+{
+ if (attr->ia_valid & ATTR_UID)
+ inode->i_uid = from_vfsuid(mnt_userns, i_user_ns(inode),
+ attr->ia_vfsuid);
}
/**
* @mnt_userns: user namespace of the mount the inode was found from
* @inode: inode to map
*
+ * Note, this will eventually be removed completely in favor of the type-safe
+ * i_gid_into_vfsgid().
+ *
* Return: the inode's i_gid mapped down according to @mnt_userns.
* If the inode's i_gid has no mapping INVALID_GID is returned.
*/
static inline kgid_t i_gid_into_mnt(struct user_namespace *mnt_userns,
const struct inode *inode)
{
- return mapped_kgid_fs(mnt_userns, i_user_ns(inode), inode->i_gid);
+ return AS_KGIDT(make_vfsgid(mnt_userns, i_user_ns(inode), inode->i_gid));
+}
+
+/**
+ * i_gid_into_vfsgid - map an inode's i_gid down into a mnt_userns
+ * @mnt_userns: user namespace of the mount the inode was found from
+ * @inode: inode to map
+ *
+ * Return: the inode's i_gid mapped down according to @mnt_userns.
+ * If the inode's i_gid has no mapping INVALID_VFSGID is returned.
+ */
+static inline vfsgid_t i_gid_into_vfsgid(struct user_namespace *mnt_userns,
+ const struct inode *inode)
+{
+ return make_vfsgid(mnt_userns, i_user_ns(inode), inode->i_gid);
+}
+
+/**
+ * i_gid_needs_update - check whether inode's i_gid needs to be updated
+ * @mnt_userns: user namespace of the mount the inode was found from
+ * @attr: the new attributes of @inode
+ * @inode: the inode to update
+ *
+ * Check whether the $inode's i_gid field needs to be updated taking idmapped
+ * mounts into account if the filesystem supports it.
+ *
+ * Return: true if @inode's i_gid field needs to be updated, false if not.
+ */
+static inline bool i_gid_needs_update(struct user_namespace *mnt_userns,
+ const struct iattr *attr,
+ const struct inode *inode)
+{
+ return ((attr->ia_valid & ATTR_GID) &&
+ !vfsgid_eq(attr->ia_vfsgid,
+ i_gid_into_vfsgid(mnt_userns, inode)));
+}
+
+/**
+ * i_gid_update - update @inode's i_gid field
+ * @mnt_userns: user namespace of the mount the inode was found from
+ * @attr: the new attributes of @inode
+ * @inode: the inode to update
+ *
+ * Safely update @inode's i_gid field translating the vfsgid of any idmapped
+ * mount into the filesystem kgid.
+ */
+static inline void i_gid_update(struct user_namespace *mnt_userns,
+ const struct iattr *attr,
+ struct inode *inode)
+{
+ if (attr->ia_valid & ATTR_GID)
+ inode->i_gid = from_vfsgid(mnt_userns, i_user_ns(inode),
+ attr->ia_vfsgid);
}
/**
static inline bool HAS_UNMAPPED_ID(struct user_namespace *mnt_userns,
struct inode *inode)
{
- return !uid_valid(i_uid_into_mnt(mnt_userns, inode)) ||
- !gid_valid(i_gid_into_mnt(mnt_userns, inode));
+ return !vfsuid_valid(i_uid_into_vfsuid(mnt_userns, inode)) ||
+ !vfsgid_valid(i_gid_into_vfsgid(mnt_userns, inode));
}
static inline void init_sync_kiocb(struct kiocb *kiocb, struct file *filp)
}
extern int file_modified(struct file *file);
+int kiocb_modified(struct kiocb *iocb);
int sync_inode_metadata(struct inode *inode, int wait);
extern void
file_ra_state_init(struct file_ra_state *ra, struct address_space *mapping);
extern loff_t noop_llseek(struct file *file, loff_t offset, int whence);
-extern loff_t no_llseek(struct file *file, loff_t offset, int whence);
+#define no_llseek NULL
extern loff_t vfs_setpos(struct file *file, loff_t offset, loff_t maxsize);
extern loff_t generic_file_llseek(struct file *file, loff_t offset, int whence);
extern loff_t generic_file_llseek_size(struct file *file, loff_t offset,
extern void generic_set_encrypted_ci_d_ops(struct dentry *dentry);
-#ifdef CONFIG_MIGRATION
-extern int buffer_migrate_page(struct address_space *,
- struct page *, struct page *,
- enum migrate_mode);
-extern int buffer_migrate_page_norefs(struct address_space *,
- struct page *, struct page *,
- enum migrate_mode);
-#else
-#define buffer_migrate_page NULL
-#define buffer_migrate_page_norefs NULL
-#endif
-
int may_setattr(struct user_namespace *mnt_userns, struct inode *inode,
unsigned int ia_valid);
int setattr_prepare(struct user_namespace *, struct dentry *, struct iattr *);
projects / platform / kernel / linux-starfive.git / blobdiff