Merge branch 'locks-3.15' of git://git.samba.org/jlayton/linux

[jlayton/linux.git] / include / linux / fs.h

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 4aa81e6ae067dde1bf950c301c5668a10eb3cc6d..a877ed3f389f8a0f8b350019ee15c3ce1e7316dd 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -123,6 +123,9 @@ typedef void (dio_iodone_t)(struct kiocb *iocb, loff_t offset,
 /* File is opened with O_PATH; almost nothing can be done with it */
 #define FMODE_PATH             ((__force fmode_t)0x4000)
 
+/* File needs atomic accesses to f_pos */
+#define FMODE_ATOMIC_POS       ((__force fmode_t)0x8000)
+
 /* File was opened by fanotify and shouldn't generate fanotify events */
 #define FMODE_NONOTIFY         ((__force fmode_t)0x1000000)
 
@@ -416,6 +419,7 @@ struct address_space {
        struct mutex            i_mmap_mutex;   /* protect tree, count, list */
        /* Protected by tree_lock together with the radix tree */
        unsigned long           nrpages;        /* number of total pages */
+       unsigned long           nrshadows;      /* number of shadow entries */
        pgoff_t                 writeback_index;/* writeback starts here */
        const struct address_space_operations *a_ops;   /* methods */
        unsigned long           flags;          /* error bits/gfp mask */
@@ -586,6 +590,9 @@ struct inode {
        atomic_t                i_count;
        atomic_t                i_dio_count;
        atomic_t                i_writecount;
+#ifdef CONFIG_IMA
+       atomic_t                i_readcount; /* struct files open RO */
+#endif
        const struct file_operations    *i_fop; /* former ->i_op->default_file_ops */
        struct file_lock        *i_flock;
        struct address_space    i_data;
@@ -606,9 +613,6 @@ struct inode {
        struct hlist_head       i_fsnotify_marks;
 #endif
 
-#ifdef CONFIG_IMA
-       atomic_t                i_readcount; /* struct files open RO */
-#endif
        void                    *i_private; /* fs or device private pointer */
 };
 
@@ -780,13 +784,14 @@ struct file {
        const struct file_operations    *f_op;
 
        /*
-        * Protects f_ep_links, f_flags, f_pos vs i_size in lseek SEEK_CUR.
+        * Protects f_ep_links, f_flags.
         * Must not be taken from IRQ context.
         */
        spinlock_t              f_lock;
        atomic_long_t           f_count;
        unsigned int            f_flags;
        fmode_t                 f_mode;
+       struct mutex            f_pos_lock;
        loff_t                  f_pos;
        struct fown_struct      f_owner;
        const struct cred       *f_cred;
@@ -808,7 +813,7 @@ struct file {
 #ifdef CONFIG_DEBUG_WRITECOUNT
        unsigned long f_mnt_write_state;
 #endif
-};
+} __attribute__((aligned(4))); /* lest something weird decides that 2 is OK */
 
 struct file_handle {
        __u32 handle_bytes;
@@ -1459,7 +1464,7 @@ extern int vfs_symlink(struct inode *, struct dentry *, const char *);
 extern int vfs_link(struct dentry *, struct inode *, struct dentry *, struct inode **);
 extern int vfs_rmdir(struct inode *, struct dentry *);
 extern int vfs_unlink(struct inode *, struct dentry *, struct inode **);
-extern int vfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *, struct inode **);
+extern int vfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *, struct inode **, unsigned int);
 
 /*
  * VFS dentry helper functions.
@@ -1570,6 +1575,8 @@ struct inode_operations {
        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 *);
        int (*setxattr) (struct dentry *, const char *,const void *,size_t,int);
@@ -2093,6 +2100,7 @@ extern struct file * dentry_open(const struct path *, int, const struct cred *);
 extern int filp_close(struct file *, fl_owner_t id);
 
 extern struct filename *getname(const char __user *);
+extern struct filename *getname_kernel(const char *);
 
 enum {
        FILE_CREATED = 1,
@@ -2287,7 +2295,13 @@ extern int filemap_fdatawrite_range(struct address_space *mapping,
 extern int vfs_fsync_range(struct file *file, loff_t start, loff_t end,
                           int datasync);
 extern int vfs_fsync(struct file *file, int datasync);
-extern int generic_write_sync(struct file *file, loff_t pos, loff_t count);
+static inline int generic_write_sync(struct file *file, loff_t pos, loff_t count)
+{
+       if (!(file->f_flags & O_DSYNC) && !IS_SYNC(file->f_mapping->host))
+               return 0;
+       return vfs_fsync_range(file, pos, pos + count - 1,
+                              (file->f_flags & __O_SYNC) ? 0 : 1);
+}
 extern void emergency_sync(void);
 extern void emergency_remount(void);
 #ifdef CONFIG_BLOCK