Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

[linux-2.6-block.git] / include / linux / fs.h

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 3e85cb8e8c20b98d76eddc0590e9eff8c8e7c8e3..8b42df09b04c9c222e3fb863daf60bef0b116a7f 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -37,6 +37,9 @@
 #include <linux/uuid.h>
 #include <linux/errseq.h>
 #include <linux/ioprio.h>
+#include <linux/fs_types.h>
+#include <linux/build_bug.h>
+#include <linux/stddef.h>
 
 #include <asm/byteorder.h>
 #include <uapi/linux/fs.h>
@@ -306,13 +309,20 @@ enum rw_hint {
 
 struct kiocb {
        struct file             *ki_filp;
+
+       /* The 'ki_filp' pointer is shared in a union for aio */
+       randomized_struct_fields_start
+
        loff_t                  ki_pos;
        void (*ki_complete)(struct kiocb *iocb, long ret, long ret2);
        void                    *private;
        int                     ki_flags;
        u16                     ki_hint;
        u16                     ki_ioprio; /* See linux/ioprio.h */
-} __randomize_layout;
+       unsigned int            ki_cookie; /* for ->iopoll */
+
+       randomized_struct_fields_end
+};
 
 static inline bool is_sync_kiocb(struct kiocb *kiocb)
 {
@@ -700,7 +710,7 @@ struct inode {
        struct fsnotify_mark_connector __rcu    *i_fsnotify_marks;
 #endif
 
-#if IS_ENABLED(CONFIG_FS_ENCRYPTION)
+#ifdef CONFIG_FS_ENCRYPTION
        struct fscrypt_info     *i_crypt_info;
 #endif
 
@@ -953,7 +963,9 @@ static inline struct file *get_file(struct file *f)
        atomic_long_inc(&f->f_count);
        return f;
 }
-#define get_file_rcu(x) atomic_long_inc_not_zero(&(x)->f_count)
+#define get_file_rcu_many(x, cnt)      \
+       atomic_long_add_unless(&(x)->f_count, (cnt), 0)
+#define get_file_rcu(x) get_file_rcu_many((x), 1)
 #define fput_atomic(x) atomic_long_add_unless(&(x)->f_count, -1, 1)
 #define file_count(x)  atomic_long_read(&(x)->f_count)
 
@@ -1406,7 +1418,7 @@ struct super_block {
        void                    *s_security;
 #endif
        const struct xattr_handler **s_xattr;
-#if IS_ENABLED(CONFIG_FS_ENCRYPTION)
+#ifdef CONFIG_FS_ENCRYPTION
        const struct fscrypt_operations *s_cop;
 #endif
        struct hlist_bl_head    s_roots;        /* alternate root dentries for NFS */
@@ -1482,11 +1494,12 @@ struct super_block {
        struct user_namespace *s_user_ns;
 
        /*
-        * Keep the lru lists last in the structure so they always sit on their
-        * own individual cachelines.
+        * The list_lru structure is essentially just a pointer to a table
+        * of per-node lru lists, each of which has its own spinlock.
+        * There is no need to put them into separate cachelines.
         */
-       struct list_lru         s_dentry_lru ____cacheline_aligned_in_smp;
-       struct list_lru         s_inode_lru ____cacheline_aligned_in_smp;
+       struct list_lru         s_dentry_lru;
+       struct list_lru         s_inode_lru;
        struct rcu_head         rcu;
        struct work_struct      destroy_work;
 
@@ -1702,22 +1715,6 @@ int fiemap_fill_next_extent(struct fiemap_extent_info *info, u64 logical,
                            u64 phys, u64 len, u32 flags);
 int fiemap_check_flags(struct fiemap_extent_info *fieinfo, u32 fs_flags);
 
-/*
- * File types
- *
- * NOTE! These match bits 12..15 of stat.st_mode
- * (ie "(i_mode >> 12) & 15").
- */
-#define DT_UNKNOWN     0
-#define DT_FIFO                1
-#define DT_CHR         2
-#define DT_DIR         4
-#define DT_BLK         6
-#define DT_REG         8
-#define DT_LNK         10
-#define DT_SOCK                12
-#define DT_WHT         14
-
 /*
  * This is the "filldir" function type, used by readdir() to let
  * the kernel specify what kind of dirent layout it wants to have.
@@ -1789,6 +1786,7 @@ struct file_operations {
        ssize_t (*write) (struct file *, const char __user *, size_t, loff_t *);
        ssize_t (*read_iter) (struct kiocb *, struct iov_iter *);
        ssize_t (*write_iter) (struct kiocb *, struct iov_iter *);
+       int (*iopoll)(struct kiocb *kiocb, bool spin);
        int (*iterate) (struct file *, struct dir_context *);
        int (*iterate_shared) (struct file *, struct dir_context *);
        __poll_t (*poll) (struct file *, struct poll_table_struct *);
@@ -2087,7 +2085,7 @@ static inline void init_sync_kiocb(struct kiocb *kiocb, struct file *filp)
  * I_WB_SWITCH         Cgroup bdi_writeback switching in progress.  Used to
  *                     synchronize competing switching instances and to tell
  *                     wb stat updates to grab the i_pages lock.  See
- *                     inode_switch_wb_work_fn() for details.
+ *                     inode_switch_wbs_work_fn() for details.
  *
  * I_OVL_INUSE         Used by overlayfs to get exclusive ownership on upper
  *                     and work dirs among overlayfs mounts.
@@ -2494,6 +2492,7 @@ struct filename {
        struct audit_names      *aname;
        const char              iname[];
 };
+static_assert(offsetof(struct filename, iname) % sizeof(long) == 0);
 
 extern long vfs_truncate(const struct path *, loff_t);
 extern int do_truncate(struct dentry *, loff_t start, unsigned int time_attrs,
@@ -3522,4 +3521,13 @@ extern void inode_nohighmem(struct inode *inode);
 extern int vfs_fadvise(struct file *file, loff_t offset, loff_t len,
                       int advice);
 
+#if defined(CONFIG_IO_URING)
+extern struct sock *io_uring_get_socket(struct file *file);
+#else
+static inline struct sock *io_uring_get_socket(struct file *file)
+{
+       return NULL;
+}
+#endif
+
 #endif /* _LINUX_FS_H */