/*
- * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2010 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
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_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 */
+ 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 */
-
+#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;
*/
pid_t mnt_dependent_pid;
void *mnt_dependent_process;
+ char fstypename_override[MFSTYPENAMELEN];
};
/*
* ioflags
*/
#define MNT_IOFLAGS_FUA_SUPPORTED 0x00000001
+#define MNT_IOFLAGS_UNMAP_SUPPORTED 0x00000002
/*
* ioqueue depth for devices that don't report one
* 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
+#endif /* CONFIG_IMGSRC_ACCESS */
#define MNTK_AUTH_CACHE_TTL 0x00008000 /* rights cache has TTL - TTL of 0 disables cache */
#define MNTK_PATH_FROM_ID 0x00010000 /* mounted file system supports id-to-path lookups */
#define MNTK_UNMOUNT_PREFLIGHT 0x00020000 /* mounted file system wants preflight check during unmount */
#define MNTK_LOCK_LOCAL 0x00100000 /* advisory locking is done above the VFS itself */
#define MNTK_VIRTUALDEV 0x00200000 /* mounted on a virtual device i.e. a disk image */
#define MNTK_ROOTDEV 0x00400000 /* this filesystem resides on the same device as the root */
+#define MNTK_SSD 0x00800000 /* underlying device is of the solid state variety */
#define MNTK_UNMOUNT 0x01000000 /* unmount in progress */
#define MNTK_MWAIT 0x02000000 /* waiting for unmount to finish */
#define MNTK_WANTRDWR 0x04000000 /* upgrade to read/write requested */
};
/*
- * 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
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_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 */
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);
+/* throttled I/O helper function */
+/* convert the lowest bit to a device index */
+extern int num_trailing_0(uint64_t n);
+
__END_DECLS
#endif /* !_SYS_MOUNT_INTERNAL_H_ */
projects / apple / xnu.git / blobdiff