Merge branch 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszer...

[mirror_ubuntu-zesty-kernel.git] / include / linux / fs.h

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 788261b74d45214e709167ad5abfc19173cf2d6c..16d2b6e874d679597478e653f3ef23974e0c33de 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -63,7 +63,7 @@ extern void __init files_maxfiles_init(void);
 
 extern struct files_stat_struct files_stat;
 extern unsigned long get_max_files(void);
-extern int sysctl_nr_open;
+extern unsigned int sysctl_nr_open;
 extern struct inodes_stat_t inodes_stat;
 extern int leases_enable, lease_break_time;
 extern int sysctl_protected_symlinks;
@@ -224,6 +224,7 @@ typedef int (dio_iodone_t)(struct kiocb *iocb, loff_t offset,
 #define ATTR_KILL_PRIV (1 << 14)
 #define ATTR_OPEN      (1 << 15) /* Truncating from open(O_TRUNC) */
 #define ATTR_TIMES_SET (1 << 16)
+#define ATTR_TOUCH     (1 << 17)
 
 /*
  * Whiteout is represented by a char device.  The following constants define the
@@ -439,8 +440,9 @@ struct address_space {
        unsigned long           nrexceptional;
        pgoff_t                 writeback_index;/* writeback starts here */
        const struct address_space_operations *a_ops;   /* methods */
-       unsigned long           flags;          /* error bits/gfp mask */
+       unsigned long           flags;          /* error bits */
        spinlock_t              private_lock;   /* for use by the address_space */
+       gfp_t                   gfp_mask;       /* implicit gfp mask for allocations */
        struct list_head        private_list;   /* ditto */
        void                    *private_data;  /* ditto */
 } __attribute__((aligned(sizeof(long))));
@@ -1065,6 +1067,18 @@ struct file_lock_context {
 
 extern void send_sigio(struct fown_struct *fown, int fd, int band);
 
+/*
+ * Return the inode to use for locking
+ *
+ * For overlayfs this should be the overlay inode, not the real inode returned
+ * by file_inode().  For any other fs file_inode(filp) and locks_inode(filp) are
+ * equal.
+ */
+static inline struct inode *locks_inode(const struct file *f)
+{
+       return f->f_path.dentry->d_inode;
+}
+
 #ifdef CONFIG_FILE_LOCKING
 extern int fcntl_getlk(struct file *, unsigned int, struct flock __user *);
 extern int fcntl_setlk(unsigned int, struct file *, unsigned int,
@@ -1252,7 +1266,7 @@ static inline struct dentry *file_dentry(const struct file *file)
 
 static inline int locks_lock_file_wait(struct file *filp, struct file_lock *fl)
 {
-       return locks_lock_inode_wait(file_inode(filp), fl);
+       return locks_lock_inode_wait(locks_inode(filp), fl);
 }
 
 struct fasync_struct {
@@ -1460,6 +1474,7 @@ static inline void i_gid_write(struct inode *inode, gid_t gid)
 }
 
 extern struct timespec current_fs_time(struct super_block *sb);
+extern struct timespec current_time(struct inode *inode);
 
 /*
  * Snapshotting support.
@@ -1734,8 +1749,6 @@ struct inode_operations {
        int (*rmdir) (struct inode *,struct dentry *);
        int (*mknod) (struct inode *,struct dentry *,umode_t,dev_t);
        int (*rename) (struct inode *, struct dentry *,
-                       struct inode *, struct dentry *);
-       int (*rename2) (struct inode *, struct dentry *,
                        struct inode *, struct dentry *, unsigned int);
        int (*setattr) (struct dentry *, struct iattr *);
        int (*getattr) (struct vfsmount *mnt, struct dentry *, struct kstat *);
@@ -2002,7 +2015,6 @@ enum file_time_flags {
        S_VERSION = 8,
 };
 
-extern bool atime_needs_update(const struct path *, struct inode *);
 extern void touch_atime(const struct path *);
 static inline void file_accessed(struct file *file)
 {
@@ -2160,7 +2172,7 @@ static inline int mandatory_lock(struct inode *ino)
 
 static inline int locks_verify_locked(struct file *file)
 {
-       if (mandatory_lock(file_inode(file)))
+       if (mandatory_lock(locks_inode(file)))
                return locks_mandatory_locked(file);
        return 0;
 }
@@ -2799,8 +2811,6 @@ extern void block_sync_page(struct page *page);
 /* fs/splice.c */
 extern ssize_t generic_file_splice_read(struct file *, loff_t *,
                struct pipe_inode_info *, size_t, unsigned int);
-extern ssize_t default_file_splice_read(struct file *, loff_t *,
-               struct pipe_inode_info *, size_t, unsigned int);
 extern ssize_t iter_file_splice_write(struct pipe_inode_info *,
                struct file *, loff_t *, size_t, unsigned int);
 extern ssize_t generic_splice_sendpage(struct pipe_inode_info *pipe,
@@ -2924,6 +2934,7 @@ extern int vfs_stat(const char __user *, struct kstat *);
 extern int vfs_lstat(const char __user *, struct kstat *);
 extern int vfs_fstat(unsigned int, struct kstat *);
 extern int vfs_fstatat(int , const char __user *, struct kstat *, int);
+extern const char *vfs_get_link(struct dentry *, struct delayed_call *);
 
 extern int __generic_block_fiemap(struct inode *inode,
                                  struct fiemap_extent_info *fieinfo,
@@ -2955,7 +2966,8 @@ extern int simple_open(struct inode *inode, struct file *file);
 extern int simple_link(struct dentry *, struct inode *, struct dentry *);
 extern int simple_unlink(struct inode *, struct dentry *);
 extern int simple_rmdir(struct inode *, struct dentry *);
-extern int simple_rename(struct inode *, struct dentry *, struct inode *, struct dentry *);
+extern int simple_rename(struct inode *, struct dentry *,
+                        struct inode *, struct dentry *, unsigned int);
 extern int noop_fsync(struct file *, loff_t, loff_t, int);
 extern int simple_empty(struct dentry *);
 extern int simple_readpage(struct file *file, struct page *page);
@@ -3000,7 +3012,7 @@ extern int buffer_migrate_page(struct address_space *,
 #define buffer_migrate_page NULL
 #endif
 
-extern int inode_change_ok(const struct inode *, struct iattr *);
+extern int setattr_prepare(struct dentry *, struct iattr *);
 extern int inode_newsize_ok(const struct inode *, loff_t offset);
 extern void setattr_copy(struct inode *inode, const struct iattr *attr);