Merge tag 'gcc-plugins-v4.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git...

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

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 0cfa471..6e1fd5d 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -18,6 +18,7 @@
 #include <linux/bug.h>
 #include <linux/mutex.h>
 #include <linux/rwsem.h>
+#include <linux/mm_types.h>
 #include <linux/capability.h>
 #include <linux/semaphore.h>
 #include <linux/fcntl.h>
@@ -295,7 +296,7 @@ struct kiocb {
        void                    *private;
        int                     ki_flags;
        enum rw_hint            ki_hint;
-};
+} __randomize_layout;
 
 static inline bool is_sync_kiocb(struct kiocb *kiocb)
 {
@@ -403,7 +404,7 @@ struct address_space {
        struct list_head        private_list;   /* ditto */
        void                    *private_data;  /* ditto */
        errseq_t                wb_err;
-} __attribute__((aligned(sizeof(long))));
+} __attribute__((aligned(sizeof(long)))) __randomize_layout;
        /*
         * On most architectures that alignment is already the case; but
         * must be enforced here for CRIS, to let the least significant bit
@@ -446,7 +447,7 @@ struct block_device {
        int                     bd_fsfreeze_count;
        /* Mutex for freeze */
        struct mutex            bd_fsfreeze_mutex;
-};
+} __randomize_layout;
 
 /*
  * Radix-tree tags, for tagging dirty and writeback pages within the pagecache
@@ -665,7 +666,7 @@ struct inode {
 #endif
 
        void                    *i_private; /* fs or device private pointer */
-};
+} __randomize_layout;
 
 static inline unsigned int i_blocksize(const struct inode *node)
 {
@@ -882,7 +883,8 @@ struct file {
 #endif /* #ifdef CONFIG_EPOLL */
        struct address_space    *f_mapping;
        errseq_t                f_wb_err;
-} __attribute__((aligned(4))); /* lest something weird decides that 2 is OK */
+} __randomize_layout
+  __attribute__((aligned(4))); /* lest something weird decides that 2 is OK */
 
 struct file_handle {
        __u32 handle_bytes;
@@ -1019,7 +1021,7 @@ struct file_lock {
                        int state;              /* state of grant or error if -ve */
                } afs;
        } fl_u;
-};
+} __randomize_layout;
 
 struct file_lock_context {
        spinlock_t              flc_lock;
@@ -1363,11 +1365,6 @@ struct super_block {
         */
        char *s_subtype;
 
-       /*
-        * Saved mount options for lazy filesystems using
-        * generic_show_options()
-        */
-       char __rcu *s_options;
        const struct dentry_operations *s_d_op; /* default d_op for dentries */
 
        /*
@@ -1416,7 +1413,7 @@ struct super_block {
 
        spinlock_t              s_inode_wblist_lock;
        struct list_head        s_inodes_wb;    /* writeback inodes */
-};
+} __randomize_layout;
 
 /* Helper functions so that in most cases filesystems will
  * not need to deal directly with kuid_t and kgid_t and can
@@ -1702,7 +1699,7 @@ struct file_operations {
                        u64);
        ssize_t (*dedupe_file_range)(struct file *, u64, u64, struct file *,
                        u64);
-};
+} __randomize_layout;
 
 struct inode_operations {
        struct dentry * (*lookup) (struct inode *,struct dentry *, unsigned int);
@@ -1954,6 +1951,9 @@ static inline void init_sync_kiocb(struct kiocb *kiocb, struct file *filp)
  *                     wb stat updates to grab mapping->tree_lock.  See
  *                     inode_switch_wb_work_fn() for details.
  *
+ * I_OVL_INUSE         Used by overlayfs to get exclusive ownership on upper
+ *                     and work dirs among overlayfs mounts.
+ *
  * Q: What is the difference between I_WILL_FREE and I_FREEING?
  */
 #define I_DIRTY_SYNC           (1 << 0)
@@ -1974,6 +1974,7 @@ static inline void init_sync_kiocb(struct kiocb *kiocb, struct file *filp)
 #define __I_DIRTY_TIME_EXPIRED 12
 #define I_DIRTY_TIME_EXPIRED   (1 << __I_DIRTY_TIME_EXPIRED)
 #define I_WB_SWITCH            (1 << 13)
+#define I_OVL_INUSE                    (1 << 14)
 
 #define I_DIRTY (I_DIRTY_SYNC | I_DIRTY_DATASYNC | I_DIRTY_PAGES)
 #define I_DIRTY_ALL (I_DIRTY | I_DIRTY_TIME)
@@ -3041,7 +3042,7 @@ extern int generic_block_fiemap(struct inode *inode,
                                struct fiemap_extent_info *fieinfo, u64 start,
                                u64 len, get_block_t *get_block);
 
-extern void get_filesystem(struct file_system_type *fs);
+extern struct file_system_type *get_filesystem(struct file_system_type *fs);
 extern void put_filesystem(struct file_system_type *fs);
 extern struct file_system_type *get_fs_type(const char *name);
 extern struct super_block *get_super(struct block_device *);
@@ -3118,15 +3119,16 @@ extern void setattr_copy(struct inode *inode, const struct iattr *attr);
 
 extern int file_update_time(struct file *file);
 
-extern int generic_show_options(struct seq_file *m, struct dentry *root);
-extern void save_mount_options(struct super_block *sb, char *options);
-extern void replace_mount_options(struct super_block *sb, char *options);
-
 static inline bool io_is_direct(struct file *filp)
 {
        return (filp->f_flags & O_DIRECT) || IS_DAX(filp->f_mapping->host);
 }
 
+static inline bool vma_is_dax(struct vm_area_struct *vma)
+{
+       return vma->vm_file && IS_DAX(vma->vm_file->f_mapping->host);
+}
+
 static inline int iocb_flags(struct file *file)
 {
        int res = 0;