xnu-2050.7.9.tar.gz

[apple/xnu.git] / bsd / sys / mount_internal.h

diff --git a/bsd/sys/mount_internal.h b/bsd/sys/mount_internal.h
index d36e8ea744593d58b64c7aad69f9b0a56bd61ebf..ccf31dd9ac1444eb2292220a55f0ef4e4d5ab100 100644 (file)
--- a/bsd/sys/mount_internal.h
+++ b/bsd/sys/mount_internal.h
@@ -1,5 +1,5 @@
 /*
 /*

- * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2011 Apple Inc. All rights reserved.

  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 


@@ -115,6 +115,7 @@ struct mount {
        struct vnodelst mnt_newvnodes;          /* list of vnodes this mount */
        uint32_t                mnt_flag;               /* flags */
        uint32_t                mnt_kern_flag;          /* kernel only flags */
        struct vnodelst mnt_newvnodes;          /* list of vnodes this mount */
        uint32_t                mnt_flag;               /* flags */
        uint32_t                mnt_kern_flag;          /* kernel only flags */

+       uint32_t                mnt_compound_ops;       /* Available compound operations */

        uint32_t                mnt_lflag;                      /* mount life cycle flags */
        uint32_t                mnt_maxsymlinklen;      /* max size of short symlink */
        struct vfsstatfs        mnt_vfsstat;            /* cache of filesystem stats */
        uint32_t                mnt_lflag;                      /* mount life cycle flags */
        uint32_t                mnt_maxsymlinklen;      /* max size of short symlink */
        struct vfsstatfs        mnt_vfsstat;            /* cache of filesystem stats */


@@ -131,17 +132,22 @@ struct mount {
        uint32_t        mnt_ioqueue_depth;      /* the maxiumum number of commands a device can accept */
         uint32_t       mnt_ioscale;            /* scale the various throttles/limits imposed on the amount of I/O in flight */
        uint32_t        mnt_ioflags;            /* flags for  underlying device */
        uint32_t        mnt_ioqueue_depth;      /* the maxiumum number of commands a device can accept */
         uint32_t       mnt_ioscale;            /* scale the various throttles/limits imposed on the amount of I/O in flight */
        uint32_t        mnt_ioflags;            /* flags for  underlying device */

-       pending_io_t    mnt_pending_write_size; /* byte count of pending writes */
-       pending_io_t    mnt_pending_read_size;  /* byte count of pending reads */
+       pending_io_t    mnt_pending_write_size __attribute__((aligned(sizeof(pending_io_t))));  /* byte count of pending writes */
+       pending_io_t    mnt_pending_read_size  __attribute__((aligned(sizeof(pending_io_t))));  /* byte count of pending reads */

 
        lck_rw_t        mnt_rwlock;             /* mutex readwrite lock */
        lck_mtx_t       mnt_renamelock;         /* mutex that serializes renames that change shape of tree */
        vnode_t         mnt_devvp;              /* the device mounted on for local file systems */
        uint32_t        mnt_devbsdunit;         /* the BSD unit number of the device */
 
        lck_rw_t        mnt_rwlock;             /* mutex readwrite lock */
        lck_mtx_t       mnt_renamelock;         /* mutex that serializes renames that change shape of tree */
        vnode_t         mnt_devvp;              /* the device mounted on for local file systems */
        uint32_t        mnt_devbsdunit;         /* the BSD unit number of the device */

+       uint64_t        mnt_throttle_mask;      /* the throttle mask of what devices will be affected by I/O from this mnt */

        void            *mnt_throttle_info;     /* used by the throttle code */
        int32_t         mnt_crossref;           /* refernces to cover lookups  crossing into mp */
        int32_t         mnt_iterref;            /* refernces to cover iterations; drained makes it -ve  */
        void            *mnt_throttle_info;     /* used by the throttle code */
        int32_t         mnt_crossref;           /* refernces to cover lookups  crossing into mp */
        int32_t         mnt_iterref;            /* refernces to cover iterations; drained makes it -ve  */

- 
+#if CONFIG_TRIGGERS
+       int32_t         mnt_numtriggers;        /* num of trigger vnodes for this mount */
+       vfs_trigger_callback_t *mnt_triggercallback;
+       void            *mnt_triggerdata;
+#endif

        /* XXX 3762912 hack to support HFS filesystem 'owner' */
        uid_t           mnt_fsowner;
        gid_t           mnt_fsgroup;
        /* XXX 3762912 hack to support HFS filesystem 'owner' */
        uid_t           mnt_fsowner;
        gid_t           mnt_fsgroup;


@@ -190,6 +196,7 @@ struct mount {
         */
        pid_t           mnt_dependent_pid;
        void            *mnt_dependent_process;
         */
        pid_t           mnt_dependent_pid;
        void            *mnt_dependent_process;

+       char            fstypename_override[MFSTYPENAMELEN];

 };
 
 /*
 };
 
 /*


@@ -202,6 +209,7 @@ struct mount {
  * ioflags
  */
 #define MNT_IOFLAGS_FUA_SUPPORTED      0x00000001
  * ioflags
  */
 #define MNT_IOFLAGS_FUA_SUPPORTED      0x00000001

+#define MNT_IOFLAGS_UNMAP_SUPPORTED    0x00000002

 
 /*
  * ioqueue depth for devices that don't report one
 
 /*
  * ioqueue depth for devices that don't report one


@@ -227,6 +235,12 @@ extern struct mount * dead_mountp;
  *             because the bits here were broken out from the high bits
  *             of the mount flags.
  */
  *             because the bits here were broken out from the high bits
  *             of the mount flags.
  */

+#define MNTK_DENY_READDIREXT 0x00000200 /* Deny Extended-style readdir's for this volume */
+#define MNTK_PERMIT_UNMOUNT    0x00000400      /* Allow (non-forced) unmounts by UIDs other than the one that mounted the volume */
+#ifdef NFSCLIENT
+#define MNTK_TYPENAME_OVERRIDE  0x00000800      /* override the fstypename for statfs() */
+#endif /* NFSCLIENT */
+#define MNTK_KERNEL_MOUNT      0x00001000      /* mount came from kernel side */

 #ifdef CONFIG_IMGSRC_ACCESS
 #define MNTK_HAS_MOVED         0x00002000
 #define MNTK_BACKS_ROOT                0x00004000
 #ifdef CONFIG_IMGSRC_ACCESS
 #define MNTK_HAS_MOVED         0x00002000
 #define MNTK_BACKS_ROOT                0x00004000


@@ -251,7 +265,7 @@ extern struct mount * dead_mountp;
 #define MNTK_AUTH_OPAQUE_ACCESS 0x40000000      /* VNOP_ACCESS is reliable for remote auth */
 #define MNTK_EXTENDED_SECURITY 0x80000000      /* extended security supported */
 
 #define MNTK_AUTH_OPAQUE_ACCESS 0x40000000      /* VNOP_ACCESS is reliable for remote auth */
 #define MNTK_EXTENDED_SECURITY 0x80000000      /* extended security supported */
 

-#define        MNT_LBUSY               0x00000001      /* mount is busy */
+#define        MNT_LNOTRESP            0x00000001      /* mount not responding */

 #define MNT_LUNMOUNT           0x00000002      /* mount in unmount */
 #define MNT_LFORCE             0x00000004      /* mount in forced unmount */
 #define MNT_LDRAIN             0x00000008      /* mount in drain */
 #define MNT_LUNMOUNT           0x00000002      /* mount in unmount */
 #define MNT_LFORCE             0x00000004      /* mount in forced unmount */
 #define MNT_LDRAIN             0x00000008      /* mount in drain */


@@ -305,9 +319,9 @@ struct vfstable {
 #define        VFC_VFSPREFLIGHT        0x040
 #define        VFC_VFSREADDIR_EXTENDED 0x080
 #define        VFC_VFS64BITREADY       0x100
 #define        VFC_VFSPREFLIGHT        0x040
 #define        VFC_VFSREADDIR_EXTENDED 0x080
 #define        VFC_VFS64BITREADY       0x100

-#ifndef __LP64__
+#if CONFIG_VFS_FUNNEL

 #define        VFC_VFSTHREADSAFE       0x200
 #define        VFC_VFSTHREADSAFE       0x200

-#endif /* __LP64__ */
+#endif /* CONFIG_VFS_FUNNEL */

 #define        VFC_VFSNOMACLABEL       0x1000
 #define        VFC_VFSVNOP_PAGEINV2    0x2000
 #define        VFC_VFSVNOP_PAGEOUTV2   0x4000
 #define        VFC_VFSNOMACLABEL       0x1000
 #define        VFC_VFSVNOP_PAGEINV2    0x2000
 #define        VFC_VFSVNOP_PAGEOUTV2   0x4000


@@ -391,13 +405,11 @@ struct user32_statfs {
 };
 
 /*
 };
 
 /*

- * throttle I/Os are affected only by normal I/Os happening on the same bsd device node.  For example, disk1s3 and
- * disk1s5 are the same device node, while disk1s3 and disk2 are not (although disk2 might be a mounted disk image file
- * and the disk image file resides on a partition in disk1).  The following constant defines the maximum number of
- * different bsd device nodes the algorithm can consider, and larger numbers are rounded by this maximum.  Since
- * throttled I/O is usually useful in non-server environment only, a small number 16 is enough in most cases
+ * throttle I/Os are affected only by normal I/Os happening on the same spindle.  Currently we use a 64-bit integer to
+ * represent what devices are affected, so we can handle at most 64 different spindles.  Since
+ * throttled I/O is usually useful in non-server environment only, this number is enough in most cases.

  */
  */

-#define LOWPRI_MAX_NUM_DEV 16
+#define LOWPRI_MAX_NUM_DEV 64

 
 __BEGIN_DECLS
 
 
 __BEGIN_DECLS
 


@@ -424,7 +436,7 @@ void        vfs_unmountall(void);
 int    safedounmount(struct mount *, int, vfs_context_t);
 int    dounmount(struct mount *, int, int, vfs_context_t);
 
 int    safedounmount(struct mount *, int, vfs_context_t);
 int    dounmount(struct mount *, int, int, vfs_context_t);
 

-/* xnuy internal api */
+/* xnu internal api */

 void  mount_dropcrossref(mount_t, vnode_t, int);
 mount_t mount_lookupby_volfsid(int, int);
 mount_t mount_list_lookupby_fsid(fsid_t *, int, int);
 void  mount_dropcrossref(mount_t, vnode_t, int);
 mount_t mount_lookupby_volfsid(int, int);
 mount_t mount_list_lookupby_fsid(fsid_t *, int, int);


@@ -436,10 +448,32 @@ void mount_iterdrop(mount_t);
 void mount_iterdrain(mount_t);
 void mount_iterreset(mount_t);
 
 void mount_iterdrain(mount_t);
 void mount_iterreset(mount_t);
 

+/* tags a volume as not supporting extended readdir for NFS exports */
+#ifdef BSD_KERNEL_PRIVATE
+void mount_set_noreaddirext (mount_t);
+#endif
+
+/* Private NFS spi */
+#define KERNEL_MOUNT_NOAUTH            0x01 /* Don't check the UID of the directory we are mounting on */
+#define KERNEL_MOUNT_PERMIT_UNMOUNT    0x02 /* Allow (non-forced) unmounts by users other the one who mounted the volume */
+#if NFSCLIENT
+/*
+ * NOTE: kernel_mount() does not force MNT_NOSUID, MNT_NOEXEC, or MNT_NODEC for non-privileged
+ * mounting credentials, as the mount(2) system call does.
+ */
+int kernel_mount(char *, vnode_t, vnode_t, const char *, void *, size_t, int, uint32_t, vfs_context_t);
+boolean_t vfs_iskernelmount(mount_t);
+#endif
+

 /* throttled I/O api */
 /* throttled I/O api */

-int throttle_get_io_policy(struct uthread **ut);
-extern void throttle_lowpri_io(boolean_t ok_to_sleep);
-int throttle_io_will_be_throttled(int lowpri_window_msecs, mount_t mp);
+int  throttle_get_io_policy(struct uthread **ut);
+int  throttle_io_will_be_throttled(int lowpri_window_msecs, mount_t mp);
+void throttle_info_update_by_mount(mount_t mp);
+void unthrottle_thread(uthread_t);
+
+/* throttled I/O helper function */
+/* convert the lowest bit to a device index */
+extern int num_trailing_0(uint64_t n);

 
 __END_DECLS
 
 
 __END_DECLS