*/
#include <linux/config.h>
-#include <linux/linkage.h>
#include <linux/limits.h>
-#include <linux/wait.h>
-#include <linux/types.h>
-#include <linux/kdev_t.h>
#include <linux/ioctl.h>
-#include <linux/list.h>
-#include <linux/dcache.h>
-#include <linux/stat.h>
-#include <linux/cache.h>
-#include <linux/radix-tree.h>
-#include <linux/kobject.h>
-#include <asm/atomic.h>
-#include <linux/audit.h>
-
-struct iovec;
-struct nameidata;
-struct pipe_inode_info;
-struct poll_table_struct;
-struct kstatfs;
-struct vm_area_struct;
-struct vfsmount;
/*
* It's silly to have NR_OPEN bigger than NR_FILE, but you can change
};
extern struct inodes_stat_t inodes_stat;
-extern int leases_enable, dir_notify_enable, lease_break_time;
+extern int leases_enable, lease_break_time;
+
+#ifdef CONFIG_DNOTIFY
+extern int dir_notify_enable;
+#endif
#define NR_FILE 8192 /* this can well be larger on a larger system */
-#define NR_RESERVED_FILES 10 /* reserved for root */
-#define NR_SUPER 256
#define MAY_EXEC 1
#define MAY_WRITE 2
#define FMODE_READ 1
#define FMODE_WRITE 2
+/* Internal kernel extensions */
+#define FMODE_LSEEK 4
+#define FMODE_PREAD 8
+#define FMODE_PWRITE FMODE_PREAD /* These go hand in hand */
+
#define RW_MASK 1
#define RWA_MASK 2
#define READ 0
#define SPECIAL 4 /* For non-blockdevice requests in request queue */
#define READ_SYNC (READ | (1 << BIO_RW_SYNC))
#define WRITE_SYNC (WRITE | (1 << BIO_RW_SYNC))
+#define WRITE_BARRIER ((1 << BIO_RW) | (1 << BIO_RW_BARRIER))
#define SEL_IN 1
#define SEL_OUT 2
#define MS_REC 16384
#define MS_VERBOSE 32768
#define MS_POSIXACL (1<<16) /* VFS does not apply the umask */
-#define MS_ONE_SECOND (1<<17) /* fs has 1 sec a/m/ctime resolution */
+#define MS_TAGXID (1<<24) /* tag inodes with context information */
+#define MS_XID (1<<25) /* use specific xid for this mount */
#define MS_ACTIVE (1<<30)
#define MS_NOUSER (1<<31)
#define S_SYNC 1 /* Writes are synced at once */
#define S_NOATIME 2 /* Do not update access times */
-#define S_QUOTA 4 /* Quota initialized for file */
-#define S_APPEND 8 /* Append-only file */
-#define S_IMMUTABLE 16 /* Immutable file */
-#define S_DEAD 32 /* removed, but still open directory */
-#define S_NOQUOTA 64 /* Inode is not counted to quota */
-#define S_DIRSYNC 128 /* Directory modifications are synchronous */
-#define S_NOCMTIME 256 /* Do not update file c/mtime */
+#define S_APPEND 4 /* Append-only file */
+#define S_IMMUTABLE 8 /* Immutable file */
+#define S_DEAD 16 /* removed, but still open directory */
+#define S_NOQUOTA 32 /* Inode is not counted to quota */
+#define S_DIRSYNC 64 /* Directory modifications are synchronous */
+#define S_NOCMTIME 128 /* Do not update file c/mtime */
+#define S_SWAPFILE 256 /* Do not truncate: swapon got its bmaps */
+#define S_PRIVATE 512 /* Inode is fs-internal */
+#define S_BARRIER 1024 /* Barrier for chroot() */
+#define S_IUNLINK 2048 /* Immutable unlink */
/*
* Note that nosuid etc flags are inode-specific: setting some file-system
((inode)->i_flags & (S_SYNC|S_DIRSYNC)))
#define IS_MANDLOCK(inode) __IS_FLG(inode, MS_MANDLOCK)
-#define IS_QUOTAINIT(inode) ((inode)->i_flags & S_QUOTA)
#define IS_NOQUOTA(inode) ((inode)->i_flags & S_NOQUOTA)
#define IS_APPEND(inode) ((inode)->i_flags & S_APPEND)
#define IS_IMMUTABLE(inode) ((inode)->i_flags & S_IMMUTABLE)
+#define IS_IUNLINK(inode) ((inode)->i_flags & S_IUNLINK)
+#define IS_IXORUNLINK(inode) ((IS_IUNLINK(inode) ? S_IMMUTABLE : 0) ^ IS_IMMUTABLE(inode))
#define IS_NOATIME(inode) (__IS_FLG(inode, MS_NOATIME) || ((inode)->i_flags & S_NOATIME))
#define IS_NODIRATIME(inode) __IS_FLG(inode, MS_NODIRATIME)
#define IS_POSIXACL(inode) __IS_FLG(inode, MS_POSIXACL)
-#define IS_ONE_SECOND(inode) __IS_FLG(inode, MS_ONE_SECOND)
+#define IS_BARRIER(inode) (S_ISDIR((inode)->i_mode) && ((inode)->i_flags & S_BARRIER))
#define IS_DEADDIR(inode) ((inode)->i_flags & S_DEAD)
#define IS_NOCMTIME(inode) ((inode)->i_flags & S_NOCMTIME)
+#define IS_SWAPFILE(inode) ((inode)->i_flags & S_SWAPFILE)
+#define IS_PRIVATE(inode) ((inode)->i_flags & S_PRIVATE)
/* the read-only stuff doesn't really belong here, but any other place is
probably as bad and I don't want to create yet another include file. */
#ifdef __KERNEL__
+#include <linux/linkage.h>
+#include <linux/wait.h>
+#include <linux/types.h>
+#include <linux/kdev_t.h>
+#include <linux/dcache.h>
+#include <linux/stat.h>
+#include <linux/cache.h>
+#include <linux/kobject.h>
+#include <linux/list.h>
+#include <linux/radix-tree.h>
+#include <linux/prio_tree.h>
+#include <linux/init.h>
+
+#include <asm/atomic.h>
#include <asm/semaphore.h>
#include <asm/byteorder.h>
+struct iovec;
+struct nameidata;
+struct pipe_inode_info;
+struct poll_table_struct;
+struct kstatfs;
+struct vm_area_struct;
+struct vfsmount;
+
/* Used to be a macro which just called the function, now just a function */
extern void update_atime (struct inode *);
-extern void inode_init(unsigned long);
-extern void mnt_init(unsigned long);
-extern void files_init(unsigned long);
+extern void __init inode_init(unsigned long);
+extern void __init inode_init_early(void);
+extern void __init mnt_init(unsigned long);
+extern void __init files_init(unsigned long);
struct buffer_head;
typedef int (get_block_t)(struct inode *inode, sector_t iblock,
#define ATTR_ATTR_FLAG 1024
#define ATTR_KILL_SUID 2048
#define ATTR_KILL_SGID 4096
+#define ATTR_XID 8192
/*
* This is the Inode Attributes structure, used for notify_change(). It
umode_t ia_mode;
uid_t ia_uid;
gid_t ia_gid;
+ xid_t ia_xid;
loff_t ia_size;
struct timespec ia_atime;
struct timespec ia_mtime;
#define ATTR_FLAG_IMMUTABLE 8 /* Immutable file */
#define ATTR_FLAG_NODIRATIME 16 /* Don't update atime for directory */
+#define ATTR_FLAG_BARRIER 512 /* Barrier for chroot() */
+#define ATTR_FLAG_IUNLINK 1024 /* Immutable unlink */
+
/*
* Includes for diskquotas.
*/
struct address_space {
struct inode *host; /* owner: inode, block_device */
struct radix_tree_root page_tree; /* radix tree of all pages */
- spinlock_t tree_lock; /* and spinlock protecting it */
+ rwlock_t tree_lock; /* and rwlock protecting it */
+ unsigned int i_mmap_writable;/* count VM_SHARED mappings */
+ struct prio_tree_root i_mmap; /* tree of private and shared mappings */
+ struct list_head i_mmap_nonlinear;/*list VM_NONLINEAR mappings */
+ spinlock_t i_mmap_lock; /* protect tree, count, list */
+ unsigned int truncate_count; /* Cover race condition with truncate */
unsigned long nrpages; /* number of total pages */
pgoff_t writeback_index;/* writeback starts here */
struct address_space_operations *a_ops; /* methods */
- struct list_head i_mmap; /* list of private mappings */
- struct list_head i_mmap_shared; /* list of shared mappings */
- struct semaphore i_shared_sem; /* protect both above lists */
- atomic_t truncate_count; /* Cover race condition with truncate */
unsigned long flags; /* error bits/gfp mask */
struct backing_dev_info *backing_dev_info; /* device readahead, etc */
spinlock_t private_lock; /* for use by the address_space */
struct list_head private_list; /* ditto */
struct address_space *assoc_mapping; /* ditto */
-};
+} __attribute__((aligned(sizeof(long))));
+ /*
+ * On most architectures that alignment is already the case; but
+ * must be enforced here for CRIS, to let the least signficant bit
+ * of struct page's "mapping" pointer be used for PAGE_MAPPING_ANON.
+ */
struct block_device {
dev_t bd_dev; /* not a kdev_t - it's a search key */
struct block_device * bd_contains;
unsigned bd_block_size;
struct hd_struct * bd_part;
+ /* number of times partitions within this device have been opened. */
unsigned bd_part_count;
int bd_invalidated;
struct gendisk * bd_disk;
struct list_head bd_list;
+ struct backing_dev_info *bd_inode_backing_dev_info;
/*
* Private data. You must have bd_claim'ed the block_device
* to use this. NOTE: bd_claim allows an owner to claim
*/
static inline int mapping_mapped(struct address_space *mapping)
{
- return !list_empty(&mapping->i_mmap) ||
- !list_empty(&mapping->i_mmap_shared);
+ return !prio_tree_empty(&mapping->i_mmap) ||
+ !list_empty(&mapping->i_mmap_nonlinear);
}
/*
* Might pages of this file have been modified in userspace?
- * Note that i_mmap_shared holds all the VM_SHARED vmas: do_mmap_pgoff
+ * Note that i_mmap_writable counts all VM_SHARED vmas: do_mmap_pgoff
* marks vma as VM_SHARED if it is shared, and the file was opened for
* writing i.e. vma may be mprotected writable even if now readonly.
*/
static inline int mapping_writably_mapped(struct address_space *mapping)
{
- return !list_empty(&mapping->i_mmap_shared);
+ return mapping->i_mmap_writable != 0;
}
/*
struct inode {
struct hlist_node i_hash;
struct list_head i_list;
+ struct list_head i_sb_list;
struct list_head i_dentry;
unsigned long i_ino;
atomic_t i_count;
unsigned int i_nlink;
uid_t i_uid;
gid_t i_gid;
+ xid_t i_xid;
dev_t i_rdev;
loff_t i_size;
struct timespec i_atime;
struct cdev *i_cdev;
int i_cindex;
+ __u32 i_generation;
+
+#ifdef CONFIG_DNOTIFY
unsigned long i_dnotify_mask; /* Directory notify events */
struct dnotify_struct *i_dnotify; /* for directory notifications */
+#endif
unsigned long i_state;
unsigned long dirtied_when; /* jiffies of first dirtying */
unsigned int i_flags;
- unsigned char i_sock;
atomic_t i_writecount;
void *i_security;
- __u32 i_generation;
union {
void *generic_ip;
} u;
rwlock_t lock; /* protects pid, uid, euid fields */
int pid; /* pid or -pgrp where SIGIO should be sent */
uid_t uid, euid; /* uid/euid of process setting the owner */
- int signum; /* posix.1b rt signal to be delivered on IO */
void *security;
+ int signum; /* posix.1b rt signal to be delivered on IO */
};
/*
struct file_ra_state {
unsigned long start; /* Current window */
unsigned long size;
- unsigned long next_size; /* Next window size */
+ unsigned long flags; /* ra flags RA_FLAG_xxx*/
+ unsigned long cache_hit; /* cache hit count*/
unsigned long prev_page; /* Cache last read() position */
unsigned long ahead_start; /* Ahead window */
unsigned long ahead_size;
- unsigned long serial_cnt; /* measure of sequentiality */
- unsigned long average; /* another measure of sequentiality */
unsigned long ra_pages; /* Maximum readahead window */
unsigned long mmap_hit; /* Cache hit stat for mmap accesses */
unsigned long mmap_miss; /* Cache miss stat for mmap accesses */
};
+#define RA_FLAG_MISS 0x01 /* a cache miss occured against this file */
+#define RA_FLAG_INCACHE 0x02 /* file is already in cache */
struct file {
struct list_head f_list;
atomic_t f_count;
unsigned int f_flags;
mode_t f_mode;
+ int f_error;
loff_t f_pos;
struct fown_struct f_owner;
unsigned int f_uid, f_gid;
- int f_error;
struct file_ra_state f_ra;
+ xid_t f_xid;
+ size_t f_maxcount;
unsigned long f_version;
void *f_security;
#define get_file(x) atomic_inc(&(x)->f_count)
#define file_count(x) atomic_read(&(x)->f_count)
-/* Initialize and open a private file and allocate its security structure. */
-extern int open_private_file(struct file *, struct dentry *, int);
-/* Release a private file and free its security structure. */
-extern void close_private_file(struct file *file);
-
#define MAX_NON_LFS ((1UL<<31) - 1)
/* Page cache limit. The filesystems should put that into their s_maxbytes
#if BITS_PER_LONG==32
#define MAX_LFS_FILESIZE (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
#elif BITS_PER_LONG==64
-#define MAX_LFS_FILESIZE 0x7fffffffffffffff
+#define MAX_LFS_FILESIZE 0x7fffffffffffffffUL
#endif
#define FL_POSIX 1
*/
typedef struct files_struct *fl_owner_t;
+struct file_lock_operations {
+ void (*fl_insert)(struct file_lock *); /* lock insertion callback */
+ void (*fl_remove)(struct file_lock *); /* lock removal callback */
+ void (*fl_copy_lock)(struct file_lock *, struct file_lock *);
+ void (*fl_release_private)(struct file_lock *);
+};
+
+struct lock_manager_operations {
+ int (*fl_compare_owner)(struct file_lock *, struct file_lock *);
+ void (*fl_notify)(struct file_lock *); /* unblock callback */
+ void (*fl_copy_lock)(struct file_lock *, struct file_lock *);
+ void (*fl_release_private)(struct file_lock *);
+ void (*fl_break)(struct file_lock *);
+ int (*fl_mylease)(struct file_lock *, struct file_lock *);
+ int (*fl_change)(struct file_lock **, int);
+};
+
/* that will die - we need it for nfs_lock_info */
#include <linux/nfs_fs_i.h>
unsigned char fl_type;
loff_t fl_start;
loff_t fl_end;
-
- void (*fl_notify)(struct file_lock *); /* unblock callback */
- void (*fl_insert)(struct file_lock *); /* lock insertion callback */
- void (*fl_remove)(struct file_lock *); /* lock removal callback */
+ xid_t fl_xid;
struct fasync_struct * fl_fasync; /* for lease break notifications */
unsigned long fl_break_time; /* for nonblocking lease breaks */
+ struct file_lock_operations *fl_ops; /* Callbacks for filesystems */
+ struct lock_manager_operations *fl_lmops; /* Callbacks for lockmanagers */
union {
struct nfs_lock_info nfs_fl;
} fl_u;
#include <linux/fcntl.h>
-extern long generic_file_fcntl(int fd, unsigned int cmd,
- unsigned long arg, struct file *filp);
-
extern int fcntl_getlk(struct file *, struct flock __user *);
extern int fcntl_setlk(struct file *, unsigned int, struct flock __user *);
extern void locks_remove_flock(struct file *);
extern struct file_lock *posix_test_lock(struct file *, struct file_lock *);
extern int posix_lock_file(struct file *, struct file_lock *);
+extern int posix_lock_file_wait(struct file *, struct file_lock *);
extern void posix_block_lock(struct file_lock *, struct file_lock *);
extern void posix_unblock_lock(struct file *, struct file_lock *);
extern int posix_locks_deadlock(struct file_lock *, struct file_lock *);
+extern int flock_lock_file_wait(struct file *filp, struct file_lock *fl);
extern int __break_lease(struct inode *inode, unsigned int flags);
extern void lease_get_mtime(struct inode *, struct timespec *time);
+extern int setlease(struct file *, long, struct file_lock **);
+extern int lease_modify(struct file_lock **, int);
extern int lock_may_read(struct inode *, loff_t start, unsigned long count);
extern int lock_may_write(struct inode *, loff_t start, unsigned long count);
extern void steal_locks(fl_owner_t from);
#define MNT_FORCE 0x00000001 /* Attempt to forcibily umount */
#define MNT_DETACH 0x00000002 /* Just detach from the tree */
+#define MNT_EXPIRE 0x00000004 /* Mark for expiry */
extern struct list_head super_blocks;
extern spinlock_t sb_lock;
int s_need_sync_fs;
atomic_t s_active;
void *s_security;
+ struct xattr_handler **s_xattr;
+ struct list_head s_inodes; /* all inodes */
struct list_head s_dirty; /* dirty inodes */
struct list_head s_io; /* parked for writeback */
struct hlist_head s_anon; /* anonymous dentries for (nfs) exporting */
* even looking at it. You had been warned.
*/
struct semaphore s_vfs_rename_sem; /* Kludge */
+
+ /* Granuality of c/m/atime in ns.
+ Cannot be worse than a second */
+ u32 s_time_gran;
};
+extern struct timespec current_fs_time(struct super_block *sb);
+
/*
* Snapshotting support.
*/
extern int vfs_create(struct inode *, struct dentry *, int, struct nameidata *);
extern int vfs_mkdir(struct inode *, struct dentry *, int);
extern int vfs_mknod(struct inode *, struct dentry *, int, dev_t);
-extern int vfs_symlink(struct inode *, struct dentry *, const char *);
+extern int vfs_symlink(struct inode *, struct dentry *, const char *, int);
extern int vfs_link(struct dentry *, struct inode *, struct dentry *);
extern int vfs_rmdir(struct inode *, struct dentry *);
extern int vfs_unlink(struct inode *, struct dentry *);
extern int vfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *);
+/*
+ * VFS dentry helper functions.
+ */
+extern void dentry_unhash(struct dentry *dentry);
+
/*
* File types
*
#define DT_SOCK 12
#define DT_WHT 14
+#define OSYNC_METADATA (1<<0)
+#define OSYNC_DATA (1<<1)
+#define OSYNC_INODE (1<<2)
+int generic_osync_inode(struct inode *, struct address_space *, int);
+
/*
* This is the "filldir" function type, used by readdir() to let
* the kernel specify what kind of dirent layout it wants to have.
int (*open) (struct inode *, struct file *);
int (*release) (struct inode *, struct file *);
int (*ioctl) (struct inode *, struct file *, unsigned, unsigned long);
+ long (*compat_ioctl) (struct file *, unsigned, unsigned long);
int (*media_changed) (struct gendisk *);
int (*revalidate_disk) (struct gendisk *);
struct module *owner;
typedef struct {
size_t written;
size_t count;
- char __user * buf;
+ union {
+ char __user * buf;
+ void *data;
+ } arg;
int error;
} read_descriptor_t;
typedef int (*read_actor_t)(read_descriptor_t *, struct page *, unsigned long, unsigned long);
+/* These macros are for out of kernel modules to test that
+ * the kernel supports the unlocked_ioctl and compat_ioctl
+ * fields in struct file_operations. */
+#define HAVE_COMPAT_IOCTL 1
+#define HAVE_UNLOCKED_IOCTL 1
+
/*
* NOTE:
- * read, write, poll, fsync, readv, writev can be called
- * without the big kernel lock held in all filesystems.
+ * read, write, poll, fsync, readv, writev, unlocked_ioctl and compat_ioctl
+ * can be called without the big kernel lock held in all filesystems.
*/
struct file_operations {
struct module *owner;
int (*readdir) (struct file *, void *, filldir_t);
unsigned int (*poll) (struct file *, struct poll_table_struct *);
int (*ioctl) (struct inode *, struct file *, unsigned int, unsigned long);
+ long (*unlocked_ioctl) (struct file *, unsigned int, unsigned long);
+ long (*compat_ioctl) (struct file *, unsigned int, unsigned long);
int (*mmap) (struct file *, struct vm_area_struct *);
int (*open) (struct inode *, struct file *);
int (*flush) (struct file *);
int (*lock) (struct file *, int, struct file_lock *);
ssize_t (*readv) (struct file *, const struct iovec *, unsigned long, loff_t *);
ssize_t (*writev) (struct file *, const struct iovec *, unsigned long, loff_t *);
- ssize_t (*sendfile) (struct file *, loff_t *, size_t, read_actor_t, void __user *);
+ ssize_t (*sendfile) (struct file *, loff_t *, size_t, read_actor_t, void *);
ssize_t (*sendpage) (struct file *, struct page *, int, size_t, loff_t *, int);
unsigned long (*get_unmapped_area)(struct file *, unsigned long, unsigned long, unsigned long, unsigned long);
- long (*fcntl)(int fd, unsigned int cmd,
- unsigned long arg, struct file *filp);
+ int (*check_flags)(int);
+ int (*dir_notify)(struct file *filp, unsigned long arg);
+ int (*flock) (struct file *, int, struct file_lock *);
};
struct inode_operations {
struct inode *, struct dentry *);
int (*readlink) (struct dentry *, char __user *,int);
int (*follow_link) (struct dentry *, struct nameidata *);
+ void (*put_link) (struct dentry *, struct nameidata *);
void (*truncate) (struct inode *);
int (*permission) (struct inode *, int, struct nameidata *);
int (*setattr) (struct dentry *, struct iattr *);
void (*read_inode) (struct inode *);
void (*dirty_inode) (struct inode *);
- void (*write_inode) (struct inode *, int);
+ int (*write_inode) (struct inode *, int);
void (*put_inode) (struct inode *);
void (*drop_inode) (struct inode *);
void (*delete_inode) (struct inode *);
void (*umount_begin) (struct super_block *);
int (*show_options)(struct seq_file *, struct vfsmount *);
+
+ ssize_t (*quota_read)(struct super_block *, int, char *, size_t, loff_t);
+ ssize_t (*quota_write)(struct super_block *, int, const char *, size_t, loff_t);
};
/* Inode state bits. Protected by inode_lock. */
#define I_DIRTY_SYNC 1 /* Not dirty enough for O_DATASYNC */
#define I_DIRTY_DATASYNC 2 /* Data-related inode changes pending */
#define I_DIRTY_PAGES 4 /* Data-related inode changes pending */
-#define I_LOCK 8
+#define __I_LOCK 3
+#define I_LOCK (1 << __I_LOCK)
#define I_FREEING 16
#define I_CLEAR 32
#define I_NEW 64
static inline void file_accessed(struct file *file)
{
- touch_atime(file->f_vfsmnt, file->f_dentry);
+ if (!(file->f_flags & O_NOATIME))
+ touch_atime(file->f_vfsmnt, file->f_dentry);
}
int sync_inode(struct inode *inode, struct writeback_control *wbc);
/**
- * &export_operations - for nfsd to communicate with file systems
- * decode_fh: decode a file handle fragment and return a &struct dentry
- * encode_fh: encode a file handle fragment from a dentry
- * get_name: find the name for a given inode in a given directory
- * get_parent: find the parent of a given directory
- * get_dentry: find a dentry for the inode given a file handle sub-fragment
+ * struct export_operations - for nfsd to communicate with file systems
+ * @decode_fh: decode a file handle fragment and return a &struct dentry
+ * @encode_fh: encode a file handle fragment from a dentry
+ * @get_name: find the name for a given inode in a given directory
+ * @get_parent: find the parent of a given directory
+ * @get_dentry: find a dentry for the inode given a file handle sub-fragment
*
* Description:
* The export_operations structure provides a means for nfsd to communicate
* with a particular exported file system - particularly enabling nfsd and
* the filesystem to co-operate when dealing with file handles.
*
- * export_operations contains two basic operation for dealing with file handles,
- * decode_fh() and encode_fh(), and allows for some other operations to be defined
- * which standard helper routines use to get specific information from the
- * filesystem.
+ * export_operations contains two basic operation for dealing with file
+ * handles, decode_fh() and encode_fh(), and allows for some other
+ * operations to be defined which standard helper routines use to get
+ * specific information from the filesystem.
*
* nfsd encodes information use to determine which filesystem a filehandle
- * applies to in the initial part of the file handle. The remainder, termed a
- * file handle fragment, is controlled completely by the filesystem.
- * The standard helper routines assume that this fragment will contain one or two
- * sub-fragments, one which identifies the file, and one which may be used to
- * identify the (a) directory containing the file.
+ * applies to in the initial part of the file handle. The remainder, termed
+ * a file handle fragment, is controlled completely by the filesystem. The
+ * standard helper routines assume that this fragment will contain one or
+ * two sub-fragments, one which identifies the file, and one which may be
+ * used to identify the (a) directory containing the file.
*
* In some situations, nfsd needs to get a dentry which is connected into a
- * specific part of the file tree. To allow for this, it passes the function
- * acceptable() together with a @context which can be used to see if the dentry
- * is acceptable. As there can be multiple dentrys for a given file, the filesystem
- * should check each one for acceptability before looking for the next. As soon
- * as an acceptable one is found, it should be returned.
+ * specific part of the file tree. To allow for this, it passes the
+ * function acceptable() together with a @context which can be used to see
+ * if the dentry is acceptable. As there can be multiple dentrys for a
+ * given file, the filesystem should check each one for acceptability before
+ * looking for the next. As soon as an acceptable one is found, it should
+ * be returned.
*
* decode_fh:
- * @decode_fh is given a &struct super_block (@sb), a file handle fragment (@fh, @fh_len)
- * and an acceptability testing function (@acceptable, @context). It should return
- * a &struct dentry which refers to the same file that the file handle fragment refers
- * to, and which passes the acceptability test. If it cannot, it should return
- * a %NULL pointer if the file was found but no acceptable &dentries were available, or
- * a %ERR_PTR error code indicating why it couldn't be found (e.g. %ENOENT or %ENOMEM).
+ * @decode_fh is given a &struct super_block (@sb), a file handle fragment
+ * (@fh, @fh_len) and an acceptability testing function (@acceptable,
+ * @context). It should return a &struct dentry which refers to the same
+ * file that the file handle fragment refers to, and which passes the
+ * acceptability test. If it cannot, it should return a %NULL pointer if
+ * the file was found but no acceptable &dentries were available, or a
+ * %ERR_PTR error code indicating why it couldn't be found (e.g. %ENOENT or
+ * %ENOMEM).
*
* encode_fh:
- * @encode_fh should store in the file handle fragment @fh (using at most @max_len bytes)
- * information that can be used by @decode_fh to recover the file refered to by the
- * &struct dentry @de. If the @connectable flag is set, the encode_fh() should store
- * sufficient information so that a good attempt can be made to find not only
- * the file but also it's place in the filesystem. This typically means storing
- * a reference to de->d_parent in the filehandle fragment.
- * encode_fh() should return the number of bytes stored or a negative error code
- * such as %-ENOSPC
+ * @encode_fh should store in the file handle fragment @fh (using at most
+ * @max_len bytes) information that can be used by @decode_fh to recover the
+ * file refered to by the &struct dentry @de. If the @connectable flag is
+ * set, the encode_fh() should store sufficient information so that a good
+ * attempt can be made to find not only the file but also it's place in the
+ * filesystem. This typically means storing a reference to de->d_parent in
+ * the filehandle fragment. encode_fh() should return the number of bytes
+ * stored or a negative error code such as %-ENOSPC
*
* get_name:
- * @get_name should find a name for the given @child in the given @parent directory.
- * The name should be stored in the @name (with the understanding that it is already
- * pointing to a a %NAME_MAX+1 sized buffer. get_name() should return %0 on success,
- * a negative error code or error.
- * @get_name will be called without @parent->i_sem held.
+ * @get_name should find a name for the given @child in the given @parent
+ * directory. The name should be stored in the @name (with the
+ * understanding that it is already pointing to a a %NAME_MAX+1 sized
+ * buffer. get_name() should return %0 on success, a negative error code
+ * or error. @get_name will be called without @parent->i_sem held.
*
* get_parent:
- * @get_parent should find the parent directory for the given @child which is also
- * a directory. In the event that it cannot be found, or storage space cannot be
- * allocated, a %ERR_PTR should be returned.
+ * @get_parent should find the parent directory for the given @child which
+ * is also a directory. In the event that it cannot be found, or storage
+ * space cannot be allocated, a %ERR_PTR should be returned.
*
* get_dentry:
- * Given a &super_block (@sb) and a pointer to a file-system specific inode identifier,
- * possibly an inode number, (@inump) get_dentry() should find the identified inode and
- * return a dentry for that inode.
- * Any suitable dentry can be returned including, if necessary, a new dentry created
- * with d_alloc_root. The caller can then find any other extant dentrys by following the
- * d_alias links. If a new dentry was created using d_alloc_root, DCACHE_NFSD_DISCONNECTED
- * should be set, and the dentry should be d_rehash()ed.
+ * Given a &super_block (@sb) and a pointer to a file-system specific inode
+ * identifier, possibly an inode number, (@inump) get_dentry() should find
+ * the identified inode and return a dentry for that inode. Any suitable
+ * dentry can be returned including, if necessary, a new dentry created with
+ * d_alloc_root. The caller can then find any other extant dentrys by
+ * following the d_alias links. If a new dentry was created using
+ * d_alloc_root, DCACHE_NFSD_DISCONNECTED should be set, and the dentry
+ * should be d_rehash()ed.
*
- * If the inode cannot be found, either a %NULL pointer or an %ERR_PTR code can be returned.
- * The @inump will be whatever was passed to nfsd_find_fh_dentry() in either the
- * @obj or @parent parameters.
+ * If the inode cannot be found, either a %NULL pointer or an %ERR_PTR code
+ * can be returned. The @inump will be whatever was passed to
+ * nfsd_find_fh_dentry() in either the @obj or @parent parameters.
*
* Locking rules:
- * get_parent is called with child->d_inode->i_sem down
- * get_name is not (which is possibly inconsistent)
+ * get_parent is called with child->d_inode->i_sem down
+ * get_name is not (which is possibly inconsistent)
*/
struct export_operations {
};
+extern struct dentry *
+find_exported_dentry(struct super_block *sb, void *obj, void *parent,
+ int (*acceptable)(void *context, struct dentry *de),
+ void *context);
struct file_system_type {
const char *name;
void *data);
struct super_block *get_sb_pseudo(struct file_system_type *, char *,
struct super_operations *ops, unsigned long);
+int __put_super(struct super_block *sb);
+int __put_super_and_need_restart(struct super_block *sb);
void unnamed_dev_init(void);
/* Alas, no aliases. Too much hassle with bringing module.h everywhere */
extern int register_filesystem(struct file_system_type *);
extern int unregister_filesystem(struct file_system_type *);
extern struct vfsmount *kern_mount(struct file_system_type *);
+extern int may_umount_tree(struct vfsmount *);
extern int may_umount(struct vfsmount *);
extern long do_mount(char *, char *, char *, unsigned long, void *);
extern int vfs_statfs(struct super_block *, struct kstatfs *);
-/* Return value for VFS lock functions - tells locks.c to lock conventionally
- * REALLY kosha for root NFS and nfs_lock
- */
-#define LOCK_USE_CLNT 1
-
#define FLOCK_VERIFY_READ 1
#define FLOCK_VERIFY_WRITE 2
return 0;
}
-static inline int locks_verify_area(int read_write, struct inode *inode,
- struct file *filp, loff_t offset,
- size_t count)
-{
- if (inode->i_flock && MANDATORY_LOCK(inode))
- return locks_mandatory_area(read_write, inode, filp, offset, count);
- return 0;
-}
+extern int rw_verify_area(int, struct file *, loff_t *, size_t);
static inline int locks_verify_truncate(struct inode *inode,
struct file *filp,
extern char * getname(const char __user *);
/* fs/dcache.c */
-extern void vfs_caches_init(unsigned long);
+extern void __init vfs_caches_init_early(void);
+extern void __init vfs_caches_init(unsigned long);
#define __getname() kmem_cache_alloc(names_cachep, SLAB_KERNEL)
#define __putname(name) kmem_cache_free(names_cachep, (void *)(name))
#ifndef CONFIG_AUDITSYSCALL
#define putname(name) __putname(name)
#else
-#define putname(name) \
- do { \
- if (unlikely(current->audit_context)) \
- audit_putname(name); \
- else \
- __putname(name); \
- } while (0)
+extern void putname(const char *name);
#endif
extern int register_blkdev(unsigned int, const char *);
extern void bd_set_size(struct block_device *, loff_t size);
extern void bd_forget(struct inode *inode);
extern void bdput(struct block_device *);
-extern int blkdev_open(struct inode *, struct file *);
extern struct block_device *open_by_devnum(dev_t, unsigned);
extern struct file_operations def_blk_fops;
extern struct address_space_operations def_blk_aops;
extern struct file_operations def_fifo_fops;
extern int ioctl_by_bdev(struct block_device *, unsigned, unsigned long);
extern int blkdev_ioctl(struct inode *, struct file *, unsigned, unsigned long);
+extern long compat_blkdev_ioctl(struct file *, unsigned, unsigned long);
extern int blkdev_get(struct block_device *, mode_t, unsigned);
extern int blkdev_put(struct block_device *);
extern int bd_claim(struct block_device *, void *);
extern void bd_release(struct block_device *);
-extern void blk_run_queues(void);
/* fs/char_dev.c */
-extern int alloc_chrdev_region(dev_t *, unsigned, unsigned, char *);
-extern int register_chrdev_region(dev_t, unsigned, char *);
+extern int alloc_chrdev_region(dev_t *, unsigned, unsigned, const char *);
+extern int register_chrdev_region(dev_t, unsigned, const char *);
extern int register_chrdev(unsigned int, const char *,
struct file_operations *);
extern int unregister_chrdev(unsigned int, const char *);
extern int check_disk_change(struct block_device *);
extern int invalidate_inodes(struct super_block *);
-extern int __invalidate_device(struct block_device *, int);
+extern int __invalidate_device(struct block_device *);
extern int invalidate_partition(struct gendisk *, int);
unsigned long invalidate_mapping_pages(struct address_space *mapping,
pgoff_t start, pgoff_t end);
S_ISLNK(inode->i_mode))
invalidate_inode_pages(inode->i_mapping);
}
-extern void invalidate_inode_pages2(struct address_space *mapping);
-extern void write_inode_now(struct inode *, int);
+extern int invalidate_inode_pages2(struct address_space *mapping);
+extern int invalidate_inode_pages2_range(struct address_space *mapping,
+ pgoff_t start, pgoff_t end);
+extern int write_inode_now(struct inode *, int);
extern int filemap_fdatawrite(struct address_space *);
extern int filemap_flush(struct address_space *);
extern int filemap_fdatawait(struct address_space *);
extern int filemap_write_and_wait(struct address_space *mapping);
+extern int filemap_write_and_wait_range(struct address_space *mapping,
+ loff_t lstart, loff_t lend);
extern void sync_supers(void);
extern void sync_filesystems(int wait);
extern void emergency_sync(void);
extern int setattr_mask(unsigned int);
extern int notify_change(struct dentry *, struct iattr *);
extern int permission(struct inode *, int, struct nameidata *);
-extern int vfs_permission(struct inode *, int);
+extern int generic_permission(struct inode *, int,
+ int (*check_acl)(struct inode *, int));
+
extern int get_write_access(struct inode *);
extern int deny_write_access(struct file *);
static inline void put_write_access(struct inode * inode)
/* needed for stackable file system support */
extern loff_t default_llseek(struct file *file, loff_t offset, int origin);
+extern loff_t vfs_llseek(struct file *file, loff_t offset, int origin);
+
extern void inode_init_once(struct inode *);
extern void iput(struct inode *);
extern struct inode * igrab(struct inode *);
extern void destroy_inode(struct inode *);
extern struct inode *new_inode(struct super_block *);
extern int remove_suid(struct dentry *);
+extern void remove_dquot_ref(struct super_block *, int, struct list_head *);
+extern struct semaphore iprune_sem;
extern void __insert_inode_hash(struct inode *, unsigned long hashval);
extern void remove_inode_hash(struct inode *);
extern ssize_t __generic_file_aio_read(struct kiocb *, const struct iovec *, unsigned long, loff_t *);
extern ssize_t generic_file_aio_write(struct kiocb *, const char __user *, size_t, loff_t);
extern ssize_t generic_file_aio_write_nolock(struct kiocb *, const struct iovec *,
- unsigned long, loff_t *);
+ unsigned long, loff_t *);
+extern ssize_t generic_file_direct_write(struct kiocb *, const struct iovec *,
+ unsigned long *, loff_t, loff_t *, size_t, size_t);
+extern ssize_t generic_file_buffered_write(struct kiocb *, const struct iovec *,
+ unsigned long, loff_t, loff_t *, size_t, ssize_t);
extern ssize_t do_sync_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos);
extern ssize_t do_sync_write(struct file *filp, const char __user *buf, size_t len, loff_t *ppos);
ssize_t generic_file_write_nolock(struct file *file, const struct iovec *iov,
unsigned long nr_segs, loff_t *ppos);
-extern ssize_t generic_file_sendfile(struct file *, loff_t *, size_t, read_actor_t, void __user *);
+extern ssize_t generic_file_sendfile(struct file *, loff_t *, size_t, read_actor_t, void *);
extern void do_generic_mapping_read(struct address_space *mapping,
struct file_ra_state *, struct file *,
loff_t *, read_descriptor_t *, read_actor_t);
extern loff_t generic_file_llseek(struct file *file, loff_t offset, int origin);
extern loff_t remote_llseek(struct file *file, loff_t offset, int origin);
extern int generic_file_open(struct inode * inode, struct file * filp);
+extern int nonseekable_open(struct inode * inode, struct file * filp);
static inline void do_generic_file_read(struct file * filp, loff_t *ppos,
read_descriptor_t * desc,
ssize_t __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
struct block_device *bdev, const struct iovec *iov, loff_t offset,
unsigned long nr_segs, get_blocks_t get_blocks, dio_iodone_t end_io,
- int needs_special_locking);
+ int lock_type);
+
+enum {
+ DIO_LOCKING = 1, /* need locking between buffered and direct access */
+ DIO_NO_LOCKING, /* bdev; no locking at all between buffered/direct */
+ DIO_OWN_LOCKING, /* filesystem locks buffered and direct internally */
+};
-/*
- * For filesystems which need locking between buffered and direct access
- */
static inline ssize_t blockdev_direct_IO(int rw, struct kiocb *iocb,
struct inode *inode, struct block_device *bdev, const struct iovec *iov,
loff_t offset, unsigned long nr_segs, get_blocks_t get_blocks,
dio_iodone_t end_io)
{
return __blockdev_direct_IO(rw, iocb, inode, bdev, iov, offset,
- nr_segs, get_blocks, end_io, 1);
+ nr_segs, get_blocks, end_io, DIO_LOCKING);
}
static inline ssize_t blockdev_direct_IO_no_locking(int rw, struct kiocb *iocb,
dio_iodone_t end_io)
{
return __blockdev_direct_IO(rw, iocb, inode, bdev, iov, offset,
- nr_segs, get_blocks, end_io, 0);
+ nr_segs, get_blocks, end_io, DIO_NO_LOCKING);
+}
+
+static inline ssize_t blockdev_direct_IO_own_locking(int rw, struct kiocb *iocb,
+ struct inode *inode, struct block_device *bdev, const struct iovec *iov,
+ loff_t offset, unsigned long nr_segs, get_blocks_t get_blocks,
+ dio_iodone_t end_io)
+{
+ return __blockdev_direct_IO(rw, iocb, inode, bdev, iov, offset,
+ nr_segs, get_blocks, end_io, DIO_OWN_LOCKING);
}
extern struct file_operations generic_ro_fops;
extern int vfs_readlink(struct dentry *, char __user *, int, const char *);
extern int vfs_follow_link(struct nameidata *, const char *);
extern int page_readlink(struct dentry *, char __user *, int);
-extern int page_follow_link(struct dentry *, struct nameidata *);
+extern int page_follow_link_light(struct dentry *, struct nameidata *);
+extern void page_put_link(struct dentry *, struct nameidata *);
extern int page_symlink(struct inode *inode, const char *symname, int len);
extern struct inode_operations page_symlink_inode_operations;
+extern int generic_readlink(struct dentry *, char __user *, int);
extern void generic_fillattr(struct inode *, struct kstat *);
extern int vfs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
void inode_add_bytes(struct inode *inode, loff_t bytes);
extern int vfs_lstat(char __user *, struct kstat *);
extern int vfs_fstat(unsigned int, struct kstat *);
+extern int vfs_ioctl(struct file *, unsigned int, unsigned int, unsigned long);
+
extern struct file_system_type *get_fs_type(const char *name);
extern struct super_block *get_super(struct block_device *);
extern struct super_block *user_get_super(dev_t);
extern int dcache_dir_close(struct inode *, struct file *);
extern loff_t dcache_dir_lseek(struct file *, loff_t, int);
extern int dcache_readdir(struct file *, void *, filldir_t);
+extern int dcache_readdir_filter(struct file *, void *, filldir_t, int (*)(struct dentry *));
extern int simple_getattr(struct vfsmount *, struct dentry *, struct kstat *);
extern int simple_statfs(struct super_block *, struct kstatfs *);
extern int simple_link(struct dentry *, struct inode *, struct dentry *);
extern struct file_operations simple_dir_operations;
extern struct inode_operations simple_dir_inode_operations;
struct tree_descr { char *name; struct file_operations *ops; int mode; };
+struct dentry *d_alloc_name(struct dentry *, const char *);
extern int simple_fill_super(struct super_block *, int, struct tree_descr *);
extern int simple_pin_fs(char *name, struct vfsmount **mount, int *count);
extern void simple_release_fs(struct vfsmount **mount, int *count);
+extern ssize_t simple_read_from_buffer(void __user *, size_t, loff_t *, const void *, size_t);
+
extern int inode_change_ok(struct inode *, struct iattr *);
-extern int inode_setattr(struct inode *, struct iattr *);
+extern int __must_check inode_setattr(struct inode *, struct iattr *);
extern void inode_update_time(struct inode *inode, int ctime_too);
/* kernel/fork.c */
extern int unshare_files(void);
+/* Transaction based IO helpers */
+
+/*
+ * An argresp is stored in an allocated page and holds the
+ * size of the argument or response, along with its content
+ */
+struct simple_transaction_argresp {
+ ssize_t size;
+ char data[0];
+};
+
+#define SIMPLE_TRANSACTION_LIMIT (PAGE_SIZE - sizeof(struct simple_transaction_argresp))
+
+char *simple_transaction_get(struct file *file, const char __user *buf,
+ size_t size);
+ssize_t simple_transaction_read(struct file *file, char __user *buf,
+ size_t size, loff_t *pos);
+int simple_transaction_release(struct inode *inode, struct file *file);
+
+static inline void simple_transaction_set(struct file *file, size_t n)
+{
+ struct simple_transaction_argresp *ar = file->private_data;
+
+ BUG_ON(n > SIMPLE_TRANSACTION_LIMIT);
+
+ /*
+ * The barrier ensures that ar->size will really remain zero until
+ * ar->data is ready for reading.
+ */
+ smp_mb();
+ ar->size = n;
+}
+
#ifdef CONFIG_SECURITY
static inline char *alloc_secdata(void)
{
git://git.onelab.eu / linux-2.6.git / blobdiff