vfs: embed struct filename inside of names_cache allocation if possible

[pandora-kernel.git] / include / linux / fs.h

diff --git a/include/linux/fs.h b/include/linux/fs.h
index ca6d8c8..65fbf57 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -335,6 +335,7 @@ struct inodes_stat_t {
 #define BLKDISCARDZEROES _IO(0x12,124)
 #define BLKSECDISCARD _IO(0x12,125)
 #define BLKROTATIONAL _IO(0x12,126)
+#define BLKZEROOUT _IO(0x12,127)
 
 #define BMAP_IOCTL 1           /* obsolete - kept for compatibility */
 #define FIBMAP    _IO(0x00,1)  /* bmap access */
@@ -401,7 +402,7 @@ struct inodes_stat_t {
 #include <linux/cache.h>
 #include <linux/list.h>
 #include <linux/radix-tree.h>
-#include <linux/prio_tree.h>
+#include <linux/rbtree.h>
 #include <linux/init.h>
 #include <linux/pid.h>
 #include <linux/bug.h>
@@ -415,6 +416,7 @@ struct inodes_stat_t {
 #include <linux/migrate_mode.h>
 #include <linux/uidgid.h>
 #include <linux/lockdep.h>
+#include <linux/percpu-rwsem.h>
 
 #include <asm/byteorder.h>
 
@@ -669,7 +671,7 @@ struct address_space {
        struct radix_tree_root  page_tree;      /* radix tree of all pages */
        spinlock_t              tree_lock;      /* and lock protecting it */
        unsigned int            i_mmap_writable;/* count VM_SHARED mappings */
-       struct prio_tree_root   i_mmap;         /* tree of private and shared mappings */
+       struct rb_root          i_mmap;         /* tree of private and shared mappings */
        struct list_head        i_mmap_nonlinear;/*list VM_NONLINEAR mappings */
        struct mutex            i_mmap_mutex;   /* protect tree, count, list */
        /* Protected by tree_lock together with the radix tree */
@@ -724,6 +726,8 @@ struct block_device {
        int                     bd_fsfreeze_count;
        /* Mutex for freeze */
        struct mutex            bd_fsfreeze_mutex;
+       /* A semaphore that prevents I/O while block size is being changed */
+       struct percpu_rw_semaphore      bd_block_size_semaphore;
 };
 
 /*
@@ -741,7 +745,7 @@ int mapping_tagged(struct address_space *mapping, int tag);
  */
 static inline int mapping_mapped(struct address_space *mapping)
 {
-       return  !prio_tree_empty(&mapping->i_mmap) ||
+       return  !RB_EMPTY_ROOT(&mapping->i_mmap) ||
                !list_empty(&mapping->i_mmap_nonlinear);
 }
 
@@ -1132,7 +1136,7 @@ static inline int file_check_writeable(struct file *filp)
 #if BITS_PER_LONG==32
 #define MAX_LFS_FILESIZE       (((loff_t)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1) 
 #elif BITS_PER_LONG==64
-#define MAX_LFS_FILESIZE       ((loff_t)0x7fffffffffffffff)
+#define MAX_LFS_FILESIZE       ((loff_t)0x7fffffffffffffffLL)
 #endif
 
 #define FL_POSIX       1
@@ -1507,7 +1511,6 @@ struct super_block {
        unsigned long           s_magic;
        struct dentry           *s_root;
        struct rw_semaphore     s_umount;
-       struct mutex            s_lock;
        int                     s_count;
        atomic_t                s_active;
 #ifdef CONFIG_SECURITY
@@ -2076,7 +2079,7 @@ extern struct vfsmount *kern_mount_data(struct file_system_type *, void *data);
 extern void kern_unmount(struct vfsmount *mnt);
 extern int may_umount_tree(struct vfsmount *);
 extern int may_umount(struct vfsmount *);
-extern long do_mount(char *, char *, char *, unsigned long, void *);
+extern long do_mount(const char *, const char *, const char *, unsigned long, void *);
 extern struct vfsmount *collect_mounts(struct path *);
 extern void drop_collected_mounts(struct vfsmount *);
 extern int iterate_mounts(int (*)(struct vfsmount *, void *), void *,
@@ -2193,6 +2196,13 @@ static inline int break_lease(struct inode *inode, unsigned int mode)
 #endif /* CONFIG_FILE_LOCKING */
 
 /* fs/open.c */
+struct audit_names;
+struct filename {
+       const char              *name;  /* pointer to actual string */
+       const __user char       *uptr;  /* original userland pointer */
+       struct audit_names      *aname;
+       bool                    separate; /* should "name" be freed? */
+};
 
 extern int do_truncate(struct dentry *, loff_t start, unsigned int time_attrs,
                       struct file *filp);
@@ -2200,12 +2210,15 @@ extern int do_fallocate(struct file *file, int mode, loff_t offset,
                        loff_t len);
 extern long do_sys_open(int dfd, const char __user *filename, int flags,
                        umode_t mode);
+extern struct file *file_open_name(struct filename *, int, umode_t);
 extern struct file *filp_open(const char *, int, umode_t);
 extern struct file *file_open_root(struct dentry *, struct vfsmount *,
                                   const char *, int);
 extern struct file * dentry_open(const struct path *, int, const struct cred *);
 extern int filp_close(struct file *, fl_owner_t id);
-extern char * getname(const char __user *);
+
+extern struct filename *getname(const char __user *);
+
 enum {
        FILE_CREATED = 1,
        FILE_OPENED = 2
@@ -2225,13 +2238,14 @@ extern void __init vfs_caches_init(unsigned long);
 
 extern struct kmem_cache *names_cachep;
 
-#define __getname_gfp(gfp)     kmem_cache_alloc(names_cachep, (gfp))
-#define __getname()            __getname_gfp(GFP_KERNEL)
+extern void final_putname(struct filename *name);
+
+#define __getname()            kmem_cache_alloc(names_cachep, GFP_KERNEL)
 #define __putname(name)                kmem_cache_free(names_cachep, (void *)(name))
 #ifndef CONFIG_AUDITSYSCALL
-#define putname(name)   __putname(name)
+#define putname(name)          final_putname(name)
 #else
-extern void putname(const char *name);
+extern void putname(struct filename *name);
 #endif
 
 #ifdef CONFIG_BLOCK
@@ -2552,6 +2566,8 @@ extern int sb_min_blocksize(struct super_block *, int);
 
 extern int generic_file_mmap(struct file *, struct vm_area_struct *);
 extern int generic_file_readonly_mmap(struct file *, struct vm_area_struct *);
+extern int generic_file_remap_pages(struct vm_area_struct *, unsigned long addr,
+               unsigned long size, pgoff_t pgoff);
 extern int file_read_actor(read_descriptor_t * desc, struct page *page, unsigned long offset, unsigned long size);
 int generic_write_checks(struct file *file, loff_t *pos, size_t *count, int isblk);
 extern ssize_t generic_file_aio_read(struct kiocb *, const struct iovec *, unsigned long, loff_t);
@@ -2568,6 +2584,8 @@ extern int generic_segment_checks(const struct iovec *iov,
                unsigned long *nr_segs, size_t *count, int access_flags);
 
 /* fs/block_dev.c */
+extern ssize_t blkdev_aio_read(struct kiocb *iocb, const struct iovec *iov,
+                              unsigned long nr_segs, loff_t pos);
 extern ssize_t blkdev_aio_write(struct kiocb *iocb, const struct iovec *iov,
                                unsigned long nr_segs, loff_t pos);
 extern int blkdev_fsync(struct file *filp, loff_t start, loff_t end,