* Copyright (c) 2000-2016 Apple Computer, Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
+ *
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
- *
+ *
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
- *
+ *
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
- *
+ *
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
extern struct vnodeop_desc vnop_select_desc;
extern struct vnodeop_desc vnop_exchange_desc;
extern struct vnodeop_desc vnop_revoke_desc;
+extern struct vnodeop_desc vnop_mmap_check_desc;
extern struct vnodeop_desc vnop_mmap_desc;
extern struct vnodeop_desc vnop_mnomap_desc;
extern struct vnodeop_desc vnop_fsync_desc;
};
/*!
- @function VNOP_LOOKUP
- @abstract Call down to a filesystem to look for a directory entry by name.
- @discussion VNOP_LOOKUP is the key pathway through which VFS asks a filesystem to find a file. The vnode
- should be returned with an iocount to be dropped by the caller. A VNOP_LOOKUP() calldown can come without
- a preceding VNOP_OPEN().
- @param dvp Directory in which to look up file.
- @param vpp Destination for found vnode.
- @param cnp Structure describing filename to find, reason for lookup, and various other data.
- @param ctx Context against which to authenticate lookup request.
- @return 0 for success or a filesystem-specific error.
+ * @function VNOP_LOOKUP
+ * @abstract Call down to a filesystem to look for a directory entry by name.
+ * @discussion VNOP_LOOKUP is the key pathway through which VFS asks a filesystem to find a file. The vnode
+ * should be returned with an iocount to be dropped by the caller. A VNOP_LOOKUP() calldown can come without
+ * a preceding VNOP_OPEN().
+ * @param dvp Directory in which to look up file.
+ * @param vpp Destination for found vnode.
+ * @param cnp Structure describing filename to find, reason for lookup, and various other data.
+ * @param ctx Context against which to authenticate lookup request.
+ * @return 0 for success or a filesystem-specific error.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_LOOKUP(vnode_t, vnode_t *, struct componentname *, vfs_context_t);
};
/*!
- @function VNOP_CREATE
- @abstract Call down to a filesystem to create a regular file (VREG).
- @discussion If file creation succeeds, "vpp" should be returned with an iocount to be dropped by the caller.
- A VNOP_CREATE() calldown can come without a preceding VNOP_OPEN().
- @param dvp Directory in which to create file.
- @param vpp Destination for vnode for newly created file.
- @param cnp Description of filename to create.
- @param vap File creation properties, as seen in vnode_getattr(). Manipulated with VATTR_ISACTIVE, VATTR_RETURN,
- VATTR_SET_SUPPORTED, and so forth.
- @param ctx Context against which to authenticate file creation.
- @return 0 for success or a filesystem-specific error.
+ * @function VNOP_CREATE
+ * @abstract Call down to a filesystem to create a regular file (VREG).
+ * @discussion If file creation succeeds, "vpp" should be returned with an iocount to be dropped by the caller.
+ * A VNOP_CREATE() calldown can come without a preceding VNOP_OPEN().
+ * @param dvp Directory in which to create file.
+ * @param vpp Destination for vnode for newly created file.
+ * @param cnp Description of filename to create.
+ * @param vap File creation properties, as seen in vnode_getattr(). Manipulated with VATTR_ISACTIVE, VATTR_RETURN,
+ * VATTR_SET_SUPPORTED, and so forth.
+ * @param ctx Context against which to authenticate file creation.
+ * @return 0 for success or a filesystem-specific error.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_CREATE(vnode_t, vnode_t *, struct componentname *, struct vnode_attr *, vfs_context_t);
};
/*!
- @function VNOP_WHITEOUT
- @abstract Obsolete - no longer supported.
- @discussion Whiteouts are used to support the union filesystem, whereby one filesystem is mounted "transparently"
- on top of another. A whiteout in the upper layer of a union mount is a "deletion" of a file in the lower layer;
- lookups will catch the whiteout and fail, setting ISWHITEOUT in the componentname structure, even if an underlying
- file of the same name exists. The whiteout vnop is used for creation, deletion, and checking whether a directory
- supports whiteouts (see flags).
- also support the LOOKUP flag, which is used to test whether a directory supports whiteouts.
- @param dvp Directory in which to create.
- @param cnp Name information for whiteout.
- @param flags CREATE: create a whiteout. LOOKUP: check whether a directory supports whiteouts, DELETE: remove a whiteout.
- @param ctx Context against which to authenticate whiteout creation.
- @return 0 for success or a filesystem-specific error. Returning 0 for LOOKUP indicates that a directory does support whiteouts.
+ * @function VNOP_WHITEOUT
+ * @abstract Obsolete - no longer supported.
+ * @discussion Whiteouts are used to support the union filesystem, whereby one filesystem is mounted "transparently"
+ * on top of another. A whiteout in the upper layer of a union mount is a "deletion" of a file in the lower layer;
+ * lookups will catch the whiteout and fail, setting ISWHITEOUT in the componentname structure, even if an underlying
+ * file of the same name exists. The whiteout vnop is used for creation, deletion, and checking whether a directory
+ * supports whiteouts (see flags).
+ * also support the LOOKUP flag, which is used to test whether a directory supports whiteouts.
+ * @param dvp Directory in which to create.
+ * @param cnp Name information for whiteout.
+ * @param flags CREATE: create a whiteout. LOOKUP: check whether a directory supports whiteouts, DELETE: remove a whiteout.
+ * @param ctx Context against which to authenticate whiteout creation.
+ * @return 0 for success or a filesystem-specific error. Returning 0 for LOOKUP indicates that a directory does support whiteouts.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_WHITEOUT(vnode_t, struct componentname *, int, vfs_context_t);
#endif /* XNU_KERNEL_PRIVATE */
struct vnop_mknod_args {
- struct vnodeop_desc *a_desc;
- vnode_t a_dvp;
- vnode_t *a_vpp;
- struct componentname *a_cnp;
- struct vnode_attr *a_vap;
- vfs_context_t a_context;
+ struct vnodeop_desc *a_desc;
+ vnode_t a_dvp;
+ vnode_t *a_vpp;
+ struct componentname *a_cnp;
+ struct vnode_attr *a_vap;
+ vfs_context_t a_context;
};
/*!
- @function VNOP_MKNOD
- @abstract Call down to a filesystem to create a special file.
- @discussion The mknod vnop is used to create character and block device files, named pipe (FIFO) files, and named sockets.
- The newly created file should be returned with an iocount which will be dropped by the caller. A VNOP_MKNOD() call
- can come down without a preceding VNOP_OPEN().
- @param dvp Directory in which to create the special file.
- @param vpp Destination for newly created vnode.
- @param cnp Name information for new file.
- @param vap Attributes for new file, including type.
- @param ctx Context against which to authenticate node creation.
- @return 0 for success or a filesystem-specific error.
+ * @function VNOP_MKNOD
+ * @abstract Call down to a filesystem to create a special file.
+ * @discussion The mknod vnop is used to create character and block device files, named pipe (FIFO) files, and named sockets.
+ * The newly created file should be returned with an iocount which will be dropped by the caller. A VNOP_MKNOD() call
+ * can come down without a preceding VNOP_OPEN().
+ * @param dvp Directory in which to create the special file.
+ * @param vpp Destination for newly created vnode.
+ * @param cnp Name information for new file.
+ * @param vap Attributes for new file, including type.
+ * @param ctx Context against which to authenticate node creation.
+ * @return 0 for success or a filesystem-specific error.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_MKNOD(vnode_t, vnode_t *, struct componentname *, struct vnode_attr *, vfs_context_t);
struct vnop_compound_open_args {
struct vnodeop_desc *a_desc;
- vnode_t a_dvp; /* Directory in which to open/create */
- vnode_t *a_vpp; /* Resulting vnode */
- int a_fmode; /* Open mode */
- struct componentname *a_cnp; /* Path to look up */
- struct vnode_attr *a_vap; /* Attributes with which to create, if appropriate */
- uint32_t a_flags; /* VNOP-control flags */
- uint32_t *a_status; /* Information about results */
-
- vfs_context_t a_context; /* Authorization context */
-
- int (*a_open_create_authorizer)( /* Authorizer for create case */
- vnode_t dvp, /* Directory in which to create */
- struct componentname *cnp, /* As passed to VNOP */
- struct vnode_attr *vap, /* As passed to VNOP */
- vfs_context_t ctx, /* Context */
- void *reserved); /* Who knows */
-
- int (*a_open_existing_authorizer)( /* Authorizer for preexisting case */
- vnode_t vp, /* vp to open */
- struct componentname *cnp, /* Lookup state */
- int fmode, /* As passed to VNOP */
- vfs_context_t ctx, /* Context */
- void *reserved); /* Who knows */
+ vnode_t a_dvp; /* Directory in which to open/create */
+ vnode_t *a_vpp; /* Resulting vnode */
+ int a_fmode; /* Open mode */
+ struct componentname *a_cnp; /* Path to look up */
+ struct vnode_attr *a_vap; /* Attributes with which to create, if appropriate */
+ uint32_t a_flags; /* VNOP-control flags */
+ uint32_t *a_status; /* Information about results */
+
+ vfs_context_t a_context; /* Authorization context */
+
+ int (*a_open_create_authorizer)( /* Authorizer for create case */
+ vnode_t dvp, /* Directory in which to create */
+ struct componentname *cnp, /* As passed to VNOP */
+ struct vnode_attr *vap, /* As passed to VNOP */
+ vfs_context_t ctx, /* Context */
+ void *reserved); /* Who knows */
+
+ int (*a_open_existing_authorizer)( /* Authorizer for preexisting case */
+ vnode_t vp, /* vp to open */
+ struct componentname *cnp, /* Lookup state */
+ int fmode, /* As passed to VNOP */
+ vfs_context_t ctx, /* Context */
+ void *reserved); /* Who knows */
void *a_reserved;
};
#endif /* KERNEL_PRIVATE */
/*!
- @function VNOP_OPEN
- @abstract Call down to a filesystem to open a file.
- @discussion The open vnop gives a filesystem a chance to initialize a file for
- operations like reading, writing, and ioctls. VFS promises to send down exactly one VNOP_CLOSE()
- for each VNOP_OPEN().
- @param vp File to open.
- @param mode FREAD and/or FWRITE.
- @param ctx Context against which to authenticate open.
- @return 0 for success or a filesystem-specific error.
+ * @function VNOP_OPEN
+ * @abstract Call down to a filesystem to open a file.
+ * @discussion The open vnop gives a filesystem a chance to initialize a file for
+ * operations like reading, writing, and ioctls. VFS promises to send down exactly one VNOP_CLOSE()
+ * for each VNOP_OPEN().
+ * @param vp File to open.
+ * @param mode FREAD and/or FWRITE.
+ * @param ctx Context against which to authenticate open.
+ * @return 0 for success or a filesystem-specific error.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_OPEN(vnode_t, int, vfs_context_t);
};
/*!
- @function VNOP_CLOSE
- @abstract Call down to a filesystem to close a file.
- @discussion The close vnop gives a filesystem a chance to release state set up
- by a VNOP_OPEN(). VFS promises to send down exactly one VNOP_CLOSE() for each VNOP_OPEN().
- @param vp File to close.
- @param fflag FREAD and/or FWRITE; in the case of a file opened with open(2), fflag corresponds
- to how the file was opened.
- @param ctx Context against which to authenticate close.
- @return 0 for success or a filesystem-specific error.
+ * @function VNOP_CLOSE
+ * @abstract Call down to a filesystem to close a file.
+ * @discussion The close vnop gives a filesystem a chance to release state set up
+ * by a VNOP_OPEN(). VFS promises to send down exactly one VNOP_CLOSE() for each VNOP_OPEN().
+ * @param vp File to close.
+ * @param fflag FREAD and/or FWRITE; in the case of a file opened with open(2), fflag corresponds
+ * to how the file was opened.
+ * @param ctx Context against which to authenticate close.
+ * @return 0 for success or a filesystem-specific error.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_CLOSE(vnode_t, int, vfs_context_t);
};
/*!
- @function VNOP_ACCESS
- @abstract Call down to a filesystem to see if a kauth-style operation is permitted.
- @discussion VNOP_ACCESS is currently only called on filesystems which mark themselves
- as doing their authentication remotely (vfs_setauthopaque(), vfs_authopaque()). A VNOP_ACCESS()
- calldown may come without any preceding VNOP_OPEN().
- @param vp File to authorize action for.
- @param action kauth-style action to be checked for permissions, e.g. KAUTH_VNODE_DELETE.
- @param ctx Context against which to authenticate action.
- @return 0 for success or a filesystem-specific error.
+ * @function VNOP_ACCESS
+ * @abstract Call down to a filesystem to see if a kauth-style operation is permitted.
+ * @discussion VNOP_ACCESS is currently only called on filesystems which mark themselves
+ * as doing their authentication remotely (vfs_setauthopaque(), vfs_authopaque()). A VNOP_ACCESS()
+ * calldown may come without any preceding VNOP_OPEN().
+ * @param vp File to authorize action for.
+ * @param action kauth-style action to be checked for permissions, e.g. KAUTH_VNODE_DELETE.
+ * @param ctx Context against which to authenticate action.
+ * @return 0 for success or a filesystem-specific error.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_ACCESS(vnode_t, int, vfs_context_t);
};
/*!
- @function VNOP_GETATTR
- @abstract Call down to a filesystem to get vnode attributes.
- @discussion Supported attributes ("Yes, I am returning this information") are set with VATTR_SET_SUPPORTED.
- Which attributes have been requested is checked with VATTR_IS_ACTIVE. Attributes
- are returned with VATTR_RETURN. It is through VNOP_GETATTR that routines like stat() get their information.
- A VNOP_GETATTR() calldown may come without any preceding VNOP_OPEN().
- @param vp The vnode whose attributes to get.
- @param vap Container for which attributes are requested, which attributes are supported by the filesystem, and attribute values.
- @param ctx Context against which to authenticate request for attributes.
- @return 0 for success or a filesystem-specific error. VNOP_GETATTR() can return success even if not
- all requested attributes were returned; returning an error-value should indicate that something went wrong, rather than that
- some attribute is not supported.
+ * @function VNOP_GETATTR
+ * @abstract Call down to a filesystem to get vnode attributes.
+ * @discussion Supported attributes ("Yes, I am returning this information") are set with VATTR_SET_SUPPORTED.
+ * Which attributes have been requested is checked with VATTR_IS_ACTIVE. Attributes
+ * are returned with VATTR_RETURN. It is through VNOP_GETATTR that routines like stat() get their information.
+ * A VNOP_GETATTR() calldown may come without any preceding VNOP_OPEN().
+ * @param vp The vnode whose attributes to get.
+ * @param vap Container for which attributes are requested, which attributes are supported by the filesystem, and attribute values.
+ * @param ctx Context against which to authenticate request for attributes.
+ * @return 0 for success or a filesystem-specific error. VNOP_GETATTR() can return success even if not
+ * all requested attributes were returned; returning an error-value should indicate that something went wrong, rather than that
+ * some attribute is not supported.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_GETATTR(vnode_t, struct vnode_attr *, vfs_context_t);
};
/*!
- @function VNOP_SETATTR
- @abstract Call down to a filesystem to set vnode attributes.
- @discussion Supported attributes ("Yes, I am setting this attribute.") are set with VATTR_SET_SUPPORTED.
- Requested attributes are checked with VATTR_IS_ACTIVE. Attribute values are accessed directly through
- structure fields. VNOP_SETATTR() is the core of the KPI function vnode_setattr(), which is used by chmod(),
- chown(), truncate(), and many others. A VNOP_SETATTR() call may come without any preceding VNOP_OPEN().
- @param vp The vnode whose attributes to set.
- @param vap Container for which attributes are to be set and their desired values, as well as for the filesystem to
- return information about which attributes were successfully set.
- @param ctx Context against which to authenticate request for attribute change.
- @return 0 for success or a filesystem-specific error. VNOP_SETATTR() can return success even if not
- all requested attributes were set; returning an error-value should indicate that something went wrong, rather than that
- some attribute is not supported.
+ * @function VNOP_SETATTR
+ * @abstract Call down to a filesystem to set vnode attributes.
+ * @discussion Supported attributes ("Yes, I am setting this attribute.") are set with VATTR_SET_SUPPORTED.
+ * Requested attributes are checked with VATTR_IS_ACTIVE. Attribute values are accessed directly through
+ * structure fields. VNOP_SETATTR() is the core of the KPI function vnode_setattr(), which is used by chmod(),
+ * chown(), truncate(), and many others. A VNOP_SETATTR() call may come without any preceding VNOP_OPEN().
+ * @param vp The vnode whose attributes to set.
+ * @param vap Container for which attributes are to be set and their desired values, as well as for the filesystem to
+ * return information about which attributes were successfully set.
+ * @param ctx Context against which to authenticate request for attribute change.
+ * @return 0 for success or a filesystem-specific error. VNOP_SETATTR() can return success even if not
+ * all requested attributes were set; returning an error-value should indicate that something went wrong, rather than that
+ * some attribute is not supported.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_SETATTR(vnode_t, struct vnode_attr *, vfs_context_t);
};
/*!
- @function VNOP_READ
- @abstract Call down to a filesystem to read file data.
- @discussion VNOP_READ() is where the hard work of of the read() system call happens. The filesystem may use
- the buffer cache, the cluster layer, or an alternative method to get its data; uio routines will be used to see that data
- is copied to the correct virtual address in the correct address space and will update its uio argument
- to indicate how much data has been moved.
- @param vp The vnode to read from.
- @param uio Description of request, including file offset, amount of data requested, destination address for data,
- and whether that destination is in kernel or user space.
- @param ctx Context against which to authenticate read request.
- @return 0 for success or a filesystem-specific error. VNOP_READ() can return success even if less data was
- read than originally requested; returning an error value should indicate that something actually went wrong.
+ * @function VNOP_READ
+ * @abstract Call down to a filesystem to read file data.
+ * @discussion VNOP_READ() is where the hard work of of the read() system call happens. The filesystem may use
+ * the buffer cache, the cluster layer, or an alternative method to get its data; uio routines will be used to see that data
+ * is copied to the correct virtual address in the correct address space and will update its uio argument
+ * to indicate how much data has been moved.
+ * @param vp The vnode to read from.
+ * @param uio Description of request, including file offset, amount of data requested, destination address for data,
+ * and whether that destination is in kernel or user space.
+ * @param ctx Context against which to authenticate read request.
+ * @return 0 for success or a filesystem-specific error. VNOP_READ() can return success even if less data was
+ * read than originally requested; returning an error value should indicate that something actually went wrong.
*/
extern errno_t VNOP_READ(vnode_t vp, struct uio *uio, int, vfs_context_t ctx);
};
/*!
- @function VNOP_WRITE
- @abstract Call down to the filesystem to write file data.
- @discussion VNOP_WRITE() is to write() as VNOP_READ() is to read(). The filesystem may use
- the buffer cache, the cluster layer, or an alternative method to write its data; uio routines will be used to see that data
- is copied to the correct virtual address in the correct address space and will update its uio argument
- to indicate how much data has been moved.
- @param vp The vnode to write to.
- @param uio Description of request, including file offset, amount of data to write, source address for data,
- and whether that destination is in kernel or user space.
- @param ctx Context against which to authenticate write request.
- @return 0 for success or a filesystem-specific error. VNOP_WRITE() can return success even if less data was
- written than originally requested; returning an error value should indicate that something actually went wrong.
+ * @function VNOP_WRITE
+ * @abstract Call down to the filesystem to write file data.
+ * @discussion VNOP_WRITE() is to write() as VNOP_READ() is to read(). The filesystem may use
+ * the buffer cache, the cluster layer, or an alternative method to write its data; uio routines will be used to see that data
+ * is copied to the correct virtual address in the correct address space and will update its uio argument
+ * to indicate how much data has been moved.
+ * @param vp The vnode to write to.
+ * @param uio Description of request, including file offset, amount of data to write, source address for data,
+ * and whether that destination is in kernel or user space.
+ * @param ctx Context against which to authenticate write request.
+ * @return 0 for success or a filesystem-specific error. VNOP_WRITE() can return success even if less data was
+ * written than originally requested; returning an error value should indicate that something actually went wrong.
*/
extern errno_t VNOP_WRITE(vnode_t vp, struct uio *uio, int ioflag, vfs_context_t ctx);
};
/*!
- @function VNOP_IOCTL
- @abstract Call down to a filesystem or device driver to execute various control operations on or request data about a file.
- @discussion Ioctl controls are typically associated with devices, but they can in fact be passed
- down for any file; they are used to implement any of a wide range of controls and information requests.
- fcntl() calls VNOP_IOCTL for several commands, and will attempt a VNOP_IOCTL if it is passed an unknown command,
- though no copyin or copyout of arguments can occur in this case--the "arg" must be an integer value.
- Filesystems can define their own fcntls using this mechanism. How ioctl commands are structured
- is slightly complicated; see the manual page for ioctl(2).
- @param vp The vnode to execute the command on.
- @param command Identifier for action to take.
- @param data Pointer to data; this can be an integer constant (of 32 bits only) or an address to be read from or written to,
- depending on "command." If it is an address, it is valid and resides in the kernel; callers of VNOP_IOCTL() are
- responsible for copying to and from userland.
- @param ctx Context against which to authenticate ioctl request.
- @return 0 for success or a filesystem-specific error.
+ * @function VNOP_IOCTL
+ * @abstract Call down to a filesystem or device driver to execute various control operations on or request data about a file.
+ * @discussion Ioctl controls are typically associated with devices, but they can in fact be passed
+ * down for any file; they are used to implement any of a wide range of controls and information requests.
+ * fcntl() calls VNOP_IOCTL for several commands, and will attempt a VNOP_IOCTL if it is passed an unknown command,
+ * though no copyin or copyout of arguments can occur in this case--the "arg" must be an integer value.
+ * Filesystems can define their own fcntls using this mechanism. How ioctl commands are structured
+ * is slightly complicated; see the manual page for ioctl(2).
+ * @param vp The vnode to execute the command on.
+ * @param command Identifier for action to take.
+ * @param data Pointer to data; this can be an integer constant (of 32 bits only) or an address to be read from or written to,
+ * depending on "command." If it is an address, it is valid and resides in the kernel; callers of VNOP_IOCTL() are
+ * responsible for copying to and from userland.
+ * @param ctx Context against which to authenticate ioctl request.
+ * @return 0 for success or a filesystem-specific error.
*/
extern errno_t VNOP_IOCTL(vnode_t vp, u_long command, caddr_t data, int fflag, vfs_context_t ctx);
};
/*!
- @function VNOP_SELECT
- @abstract Call down to a filesystem or device to check if a file is ready for I/O and request later notification if it is not currently ready.
- @discussion In general, regular are always "ready for I/O" and their select vnops simply return "1."
- Devices, though, may or may not be read; they keep track of who is selecting on them and send notifications
- when they become ready. xnu provides structures and routines for tracking threads waiting for I/O and waking up
- those threads: see selrecord(), selthreadclear(), seltrue(), selwait(), selwakeup(), and the selinfo structure (sys/select.h).
- @param vp The vnode to check for I/O readiness.
- @param which What kind of I/O is desired: FREAD, FWRITE.
- @param fflags Flags from fileglob as seen in fcntl.h, e.g. O_NONBLOCK, O_APPEND.
- @param wql Opaque object to pass to selrecord().
- @param ctx Context to authenticate for select request.
- @return Nonzero indicates that a file is ready for I/O. 0 indicates that the file is not ready for I/O;
- there is no way to return an error. 0 should be returned if the device (or file) is not ready for I/O
- and the driver (or filesystem) is going to track the request and provide subsequent wakeups.
- the device (or filesystem) will provide a wakeup.
+ * @function VNOP_SELECT
+ * @abstract Call down to a filesystem or device to check if a file is ready for I/O and request later notification if it is not currently ready.
+ * @discussion In general, regular are always "ready for I/O" and their select vnops simply return "1."
+ * Devices, though, may or may not be read; they keep track of who is selecting on them and send notifications
+ * when they become ready. xnu provides structures and routines for tracking threads waiting for I/O and waking up
+ * those threads: see selrecord(), selthreadclear(), seltrue(), selwait(), selwakeup(), and the selinfo structure (sys/select.h).
+ * @param vp The vnode to check for I/O readiness.
+ * @param which What kind of I/O is desired: FREAD, FWRITE.
+ * @param fflags Flags from fileglob as seen in fcntl.h, e.g. O_NONBLOCK, O_APPEND.
+ * @param wql Opaque object to pass to selrecord().
+ * @param ctx Context to authenticate for select request.
+ * @return Nonzero indicates that a file is ready for I/O. 0 indicates that the file is not ready for I/O;
+ * there is no way to return an error. 0 should be returned if the device (or file) is not ready for I/O
+ * and the driver (or filesystem) is going to track the request and provide subsequent wakeups.
+ * the device (or filesystem) will provide a wakeup.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_SELECT(vnode_t, int, int, void *, vfs_context_t);
struct vnop_exchange_args {
struct vnodeop_desc *a_desc;
vnode_t a_fvp;
- vnode_t a_tvp;
+ vnode_t a_tvp;
int a_options;
vfs_context_t a_context;
};
/*!
- @function VNOP_EXCHANGE
- @abstract Call down to a filesystem to atomically exchange the data of two files.
- @discussion VNOP_EXCHANGE() is currently only called by the exchangedata() system call. It will only
- be applied to files on the same volume.
- @param fvp First vnode.
- @param tvp Second vnode.
- @param options Unused.
- @param ctx Context to authenticate for exchangedata request.
- @return 0 for success, else an error code.
+ * @function VNOP_EXCHANGE
+ * @abstract Call down to a filesystem to atomically exchange the data of two files.
+ * @discussion VNOP_EXCHANGE() is currently only called by the exchangedata() system call. It will only
+ * be applied to files on the same volume.
+ * @param fvp First vnode.
+ * @param tvp Second vnode.
+ * @param options Unused.
+ * @param ctx Context to authenticate for exchangedata request.
+ * @return 0 for success, else an error code.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_EXCHANGE(vnode_t, vnode_t, int, vfs_context_t);
};
/*!
- @function VNOP_REVOKE
- @abstract Call down to a filesystem to invalidate all open file descriptors for a vnode.
- @discussion This function is typically called as part of a TTY revoke, but can also be
- used on regular files. Most filesystems simply use nop_revoke(), which calls vn_revoke(),
- as their revoke vnop implementation.
- @param vp The vnode to revoke.
- @param flags Unused.
- @param ctx Context to authenticate for revoke request.
- @return 0 for success, else an error code.
+ * @function VNOP_REVOKE
+ * @abstract Call down to a filesystem to invalidate all open file descriptors for a vnode.
+ * @discussion This function is typically called as part of a TTY revoke, but can also be
+ * used on regular files. Most filesystems simply use nop_revoke(), which calls vn_revoke(),
+ * as their revoke vnop implementation.
+ * @param vp The vnode to revoke.
+ * @param flags Unused.
+ * @param ctx Context to authenticate for revoke request.
+ * @return 0 for success, else an error code.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_REVOKE(vnode_t, int, vfs_context_t);
#endif /* XNU_KERNEL_PRIVATE */
+struct vnop_mmap_check_args {
+ struct vnodeop_desc *a_desc;
+ vnode_t a_vp;
+ int a_flags;
+ vfs_context_t a_context;
+};
+
+/*!
+ * @function VNOP_MMAP_CHECK
+ * @abstract Check with a filesystem if a file can be mmap-ed.
+ * @discussion VNOP_MMAP_CHECK is used to check with the file system if a
+ * file can be mmap-ed. It will be called before any call to VNOP_MMAP().
+ * @param vp The vnode being mmapped.
+ * @param flags Memory protection: PROT_READ, PROT_WRITE, PROT_EXEC.
+ * @param ctx Context to authenticate for mmap request.
+ * @return 0 for success; EPERM if the operation is not permitted; other
+ * errors (except ENOTSUP) may be returned at the discretion of the file
+ * system. ENOTSUP will never be returned by VNOP_MMAP_CHECK().
+ */
+#ifdef XNU_KERNEL_PRIVATE
+extern errno_t VNOP_MMAP_CHECK(vnode_t, int, vfs_context_t);
+#endif /* XNU_KERNEL_PRIVATE */
+
+
struct vnop_mmap_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
};
/*!
- @function VNOP_MMAP
- @abstract Notify a filesystem that a file is being mmap-ed.
- @discussion VNOP_MMAP is an advisory calldown to say that the system is mmap-ing a file.
- @param vp The vnode being mmapped.
- @param flags Memory protection: PROT_READ, PROT_WRITE, PROT_EXEC.
- @param ctx Context to authenticate for mmap request.
- @return 0 for success; all errors except EPERM are ignored.
+ * @function VNOP_MMAP
+ * @abstract Notify a filesystem that a file is being mmap-ed.
+ * @discussion VNOP_MMAP is an advisory calldown to say that the system is mmap-ing a file.
+ * @param vp The vnode being mmapped.
+ * @param flags Memory protection: PROT_READ, PROT_WRITE, PROT_EXEC.
+ * @param ctx Context to authenticate for mmap request.
+ * @return 0 for success; all errors except EPERM are ignored.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_MMAP(vnode_t, int, vfs_context_t);
};
/*!
- @function VNOP_MNOMAP
- @abstract Inform a filesystem that a file is no longer mapped.
- @discussion In general, no action is required of a filesystem for VNOP_MNOMAP.
- @param vp The vnode which is no longer mapped.
- @param ctx Context to authenticate for mnomap request.
- @return Return value is ignored.
+ * @function VNOP_MNOMAP
+ * @abstract Inform a filesystem that a file is no longer mapped.
+ * @discussion In general, no action is required of a filesystem for VNOP_MNOMAP.
+ * @param vp The vnode which is no longer mapped.
+ * @param ctx Context to authenticate for mnomap request.
+ * @return Return value is ignored.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_MNOMAP(vnode_t, vfs_context_t);
};
/*!
- @function VNOP_FSYNC
- @abstract Call down to a filesystem to synchronize a file with on-disk state.
- @discussion VNOP_FSYNC is called whenever we need to make sure that a file's data has been
- pushed to backing store, for example when recycling; it is also the heart of the fsync() system call.
- @param vp The vnode whose data to flush to backing store.
- @param ctx Context to authenticate for fsync request.
- @return 0 for success, else an error code.
+ * @function VNOP_FSYNC
+ * @abstract Call down to a filesystem to synchronize a file with on-disk state.
+ * @discussion VNOP_FSYNC is called whenever we need to make sure that a file's data has been
+ * pushed to backing store, for example when recycling; it is also the heart of the fsync() system call.
+ * @param vp The vnode whose data to flush to backing store.
+ * @param ctx Context to authenticate for fsync request.
+ * @return 0 for success, else an error code.
*/
extern errno_t VNOP_FSYNC(vnode_t vp, int waitfor, vfs_context_t ctx);
};
/*!
- @function VNOP_REMOVE
- @abstract Call down to a filesystem to delete a file.
- @discussion VNOP_REMOVE is called to remove a file from a filesystem's namespace, for example by unlink().
- It can operate on regular files, named pipes, special files, and in some cases on directories.
- @param dvp Directory in which to delete a file.
- @param vp The file to delete.
- @param cnp Filename information.
- @param ctx Context to authenticate for fsync request.
- @return 0 for success, else an error code.
+ * @function VNOP_REMOVE
+ * @abstract Call down to a filesystem to delete a file.
+ * @discussion VNOP_REMOVE is called to remove a file from a filesystem's namespace, for example by unlink().
+ * It can operate on regular files, named pipes, special files, and in some cases on directories.
+ * @param dvp Directory in which to delete a file.
+ * @param vp The file to delete.
+ * @param cnp Filename information.
+ * @param ctx Context to authenticate for fsync request.
+ * @return 0 for success, else an error code.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_REMOVE(vnode_t, vnode_t, struct componentname *, int, vfs_context_t);
#ifdef KERNEL_PRIVATE
struct vnop_compound_remove_args {
struct vnodeop_desc *a_desc;
- vnode_t a_dvp; /* Directory in which to lookup and remove */
- vnode_t *a_vpp; /* File to remove; may or may not point to NULL pointer */
- struct componentname *a_cnp; /* Name of file to remove */
- struct vnode_attr *a_vap; /* Destination for file attributes on successful delete */
- uint32_t a_flags; /* Control flags (unused) */
- vfs_context_t a_context; /* Authorization context */
- int (*a_remove_authorizer)( /* Authorizer callback */
- vnode_t dvp, /* Directory in which to delete */
- vnode_t vp, /* File to delete */
- struct componentname *cnp, /* As passed to VNOP */
- vfs_context_t ctx, /* As passed to VNOP */
- void *reserved); /* Always NULL */
- void *a_reserved; /* Unused */
+ vnode_t a_dvp; /* Directory in which to lookup and remove */
+ vnode_t *a_vpp; /* File to remove; may or may not point to NULL pointer */
+ struct componentname *a_cnp; /* Name of file to remove */
+ struct vnode_attr *a_vap; /* Destination for file attributes on successful delete */
+ uint32_t a_flags; /* Control flags (unused) */
+ vfs_context_t a_context; /* Authorization context */
+ int (*a_remove_authorizer)( /* Authorizer callback */
+ vnode_t dvp, /* Directory in which to delete */
+ vnode_t vp, /* File to delete */
+ struct componentname *cnp, /* As passed to VNOP */
+ vfs_context_t ctx, /* As passed to VNOP */
+ void *reserved); /* Always NULL */
+ void *a_reserved; /* Unused */
};
#endif /* KERNEL_PRIVATE */
-#ifdef BSD_KERNEL_PRIVATE
+#ifdef BSD_KERNEL_PRIVATE
extern errno_t VNOP_COMPOUND_REMOVE(vnode_t, vnode_t*, struct nameidata *, int32_t flags, struct vnode_attr *vap, vfs_context_t);
-#endif
+#endif
struct vnop_link_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
};
/*!
- @function VNOP_LINK
- @abstract Call down to a filesystem to create a hardlink to a file.
- @discussion See "man 2 link".
- @param vp File to link to.
- @param dvp Directory in which to create the link.
- @param cnp Filename information for new link.
- @param ctx Context to authenticate for link request.
- @return 0 for success, else an error code.
+ * @function VNOP_LINK
+ * @abstract Call down to a filesystem to create a hardlink to a file.
+ * @discussion See "man 2 link".
+ * @param vp File to link to.
+ * @param dvp Directory in which to create the link.
+ * @param cnp Filename information for new link.
+ * @param ctx Context to authenticate for link request.
+ * @return 0 for success, else an error code.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_LINK(vnode_t, vnode_t, struct componentname *, vfs_context_t);
};
/*!
- @function VNOP_RENAME
- @abstract Call down to a filesystem to rename a file.
- @discussion VNOP_RENAME() will only be called with a source and target on the same volume.
- @param fdvp Directory in which source file resides.
- @param fvp File being renamed.
- @param fcnp Name information for source file.
- @param tdvp Directory file is being moved to.
- @param tvp Existing file with same name as target, should one exist.
- @param tcnp Name information for target path.
- @param ctx Context to authenticate for rename request.
- @return 0 for success, else an error code.
+ * @function VNOP_RENAME
+ * @abstract Call down to a filesystem to rename a file.
+ * @discussion VNOP_RENAME() will only be called with a source and target on the same volume.
+ * @param fdvp Directory in which source file resides.
+ * @param fvp File being renamed.
+ * @param fcnp Name information for source file.
+ * @param tdvp Directory file is being moved to.
+ * @param tvp Existing file with same name as target, should one exist.
+ * @param tcnp Name information for target path.
+ * @param ctx Context to authenticate for rename request.
+ * @return 0 for success, else an error code.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_RENAME(vnode_t, vnode_t, struct componentname *, vnode_t, vnode_t, struct componentname *, vfs_context_t);
// Must match sys/stdio.h
enum {
- VFS_RENAME_SECLUDE = 0x00000001,
- VFS_RENAME_SWAP = 0x00000002,
- VFS_RENAME_EXCL = 0x00000004,
-
- VFS_RENAME_FLAGS_MASK = (VFS_RENAME_SECLUDE | VFS_RENAME_SWAP
- | VFS_RENAME_EXCL),
+ VFS_RENAME_SECLUDE = 0x00000001,
+ VFS_RENAME_SWAP = 0x00000002,
+ VFS_RENAME_EXCL = 0x00000004,
+
+ /*
+ * VFS_RENAME_DATALESS is kernel-only and is intentionally
+ * not included in VFS_RENAME_FLAGS_MASK.
+ */
+ VFS_RENAME_DATALESS = 0x00000008,
+
+ VFS_RENAME_FLAGS_MASK = (VFS_RENAME_SECLUDE | VFS_RENAME_SWAP
+ | VFS_RENAME_EXCL),
};
struct vnop_renamex_args {
vnode_t a_tdvp;
vnode_t a_tvp;
struct componentname *a_tcnp;
- struct vnode_attr *a_vap; // Reserved for future use
+ struct vnode_attr *a_vap; // Reserved for future use
vfs_rename_flags_t a_flags;
vfs_context_t a_context;
};
/*!
- @function VNOP_RENAMEX
- @abstract Call down to a filesystem to rename a file.
- @discussion VNOP_RENAMEX() will only be called with a source and target on the same volume.
- @param fdvp Directory in which source file resides.
- @param fvp File being renamed.
- @param fcnp Name information for source file.
- @param tdvp Directory file is being moved to.
- @param tvp Existing file with same name as target, should one exist.
- @param tcnp Name information for target path.
- @param flags Control certain rename semantics.
- @param ctx Context to authenticate for rename request.
- @return 0 for success, else an error code.
+ * @function VNOP_RENAMEX
+ * @abstract Call down to a filesystem to rename a file.
+ * @discussion VNOP_RENAMEX() will only be called with a source and target on the same volume.
+ * @param fdvp Directory in which source file resides.
+ * @param fvp File being renamed.
+ * @param fcnp Name information for source file.
+ * @param tdvp Directory file is being moved to.
+ * @param tvp Existing file with same name as target, should one exist.
+ * @param tcnp Name information for target path.
+ * @param flags Control certain rename semantics.
+ * @param ctx Context to authenticate for rename request.
+ * @return 0 for success, else an error code.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_RENAMEX(vnode_t, vnode_t, struct componentname *, vnode_t, vnode_t, struct componentname *, vfs_rename_flags_t, vfs_context_t);
struct vnop_compound_rename_args {
struct vnodeop_desc *a_desc;
- vnode_t a_fdvp; /* Directory from which to rename */
- vnode_t *a_fvpp; /* Vnode to rename (can point to a NULL pointer) */
- struct componentname *a_fcnp; /* Source name */
- struct vnode_attr *a_fvap;
+ vnode_t a_fdvp; /* Directory from which to rename */
+ vnode_t *a_fvpp; /* Vnode to rename (can point to a NULL pointer) */
+ struct componentname *a_fcnp; /* Source name */
+ struct vnode_attr *a_fvap;
- vnode_t a_tdvp; /* Directory to which to rename */
- vnode_t *a_tvpp; /* Vnode to rename over (can point to a NULL pointer) */
- struct componentname *a_tcnp; /* Destination name */
+ vnode_t a_tdvp; /* Directory to which to rename */
+ vnode_t *a_tvpp; /* Vnode to rename over (can point to a NULL pointer) */
+ struct componentname *a_tcnp; /* Destination name */
struct vnode_attr *a_tvap;
- uint32_t a_flags; /* Control flags: currently unused */
- vfs_context_t a_context; /* Authorization context */
- int (*a_rename_authorizer)( /* Authorization callback */
- vnode_t fdvp, /* As passed to VNOP */
- vnode_t fvp, /* Vnode to rename */
- struct componentname *fcnp, /* As passed to VNOP */
- vnode_t tdvp, /* As passed to VNOP */
- vnode_t tvp, /* Vnode to rename over (can be NULL) */
- struct componentname *tcnp, /* As passed to VNOP */
- vfs_context_t ctx, /* As passed to VNOP */
- void *reserved); /* Always NULL */
- void *a_reserved; /* Currently unused */
+ uint32_t a_flags; /* Control flags: currently unused */
+ vfs_context_t a_context; /* Authorization context */
+ int (*a_rename_authorizer)( /* Authorization callback */
+ vnode_t fdvp, /* As passed to VNOP */
+ vnode_t fvp, /* Vnode to rename */
+ struct componentname *fcnp, /* As passed to VNOP */
+ vnode_t tdvp, /* As passed to VNOP */
+ vnode_t tvp, /* Vnode to rename over (can be NULL) */
+ struct componentname *tcnp, /* As passed to VNOP */
+ vfs_context_t ctx, /* As passed to VNOP */
+ void *reserved); /* Always NULL */
+ void *a_reserved; /* Currently unused */
};
#endif /* KERNEL_PRIVATE */
#ifdef XNU_KERNEL_PRIVATE
-errno_t
-VNOP_COMPOUND_RENAME(
- struct vnode *fdvp, struct vnode **fvpp, struct componentname *fcnp, struct vnode_attr *fvap,
- struct vnode *tdvp, struct vnode **tvpp, struct componentname *tcnp, struct vnode_attr *tvap,
- uint32_t flags,vfs_context_t ctx);
+errno_t
+VNOP_COMPOUND_RENAME(
+ struct vnode *fdvp, struct vnode **fvpp, struct componentname *fcnp, struct vnode_attr *fvap,
+ struct vnode *tdvp, struct vnode **tvpp, struct componentname *tcnp, struct vnode_attr *tvap,
+ uint32_t flags, vfs_context_t ctx);
#endif /* XNU_KERNEL_PRIVATE */
struct vnop_mkdir_args {
};
/*!
- @function VNOP_MKDIR
- @abstract Call down to a filesystem to create a directory.
- @discussion The newly created directory should be returned with an iocount which will be dropped by the caller.
- @param dvp Directory in which to create new directory.
- @param vpp Destination for pointer to new directory's vnode.
- @param cnp Name information for new directory.
- @param vap Attributes for new directory.
- @param ctx Context to authenticate for mkdir request.
- @return 0 for success, else an error code.
+ * @function VNOP_MKDIR
+ * @abstract Call down to a filesystem to create a directory.
+ * @discussion The newly created directory should be returned with an iocount which will be dropped by the caller.
+ * @param dvp Directory in which to create new directory.
+ * @param vpp Destination for pointer to new directory's vnode.
+ * @param cnp Name information for new directory.
+ * @param vap Attributes for new directory.
+ * @param ctx Context to authenticate for mkdir request.
+ * @return 0 for success, else an error code.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_MKDIR(vnode_t, vnode_t *, struct componentname *, struct vnode_attr *, vfs_context_t);
#ifdef KERNEL_PRIVATE
struct vnop_compound_mkdir_args {
struct vnodeop_desc *a_desc;
- vnode_t a_dvp; /* Directory in which to create */
- vnode_t *a_vpp; /* Destination for found or created vnode */
- struct componentname *a_cnp; /* Name of directory to create */
- struct vnode_attr *a_vap; /* Creation attributes */
- uint32_t a_flags; /* Control flags (unused) */
- vfs_context_t a_context; /* Authorization context */
+ vnode_t a_dvp; /* Directory in which to create */
+ vnode_t *a_vpp; /* Destination for found or created vnode */
+ struct componentname *a_cnp; /* Name of directory to create */
+ struct vnode_attr *a_vap; /* Creation attributes */
+ uint32_t a_flags; /* Control flags (unused) */
+ vfs_context_t a_context; /* Authorization context */
#if 0
int (*a_mkdir_authorizer)(vnode_t dvp, struct componentname *cnp, struct vnode_attr *vap, vfs_context_t ctx, void *reserved);
#endif /* 0 */
- void *a_reserved; /* Unused */
+ void *a_reserved; /* Unused */
};
#endif /* KERNEL_PRIVATE */
};
/*!
- @function VNOP_RMDIR
- @abstract Call down to a filesystem to delete a directory.
- @param dvp Parent of directory to be removed.
- @param vp Directory to remove.
- @param cnp Name information for directory to be deleted.
- @param ctx Context to authenticate for rmdir request.
- @return 0 for success, else an error code.
+ * @function VNOP_RMDIR
+ * @abstract Call down to a filesystem to delete a directory.
+ * @param dvp Parent of directory to be removed.
+ * @param vp Directory to remove.
+ * @param cnp Name information for directory to be deleted.
+ * @param ctx Context to authenticate for rmdir request.
+ * @return 0 for success, else an error code.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_RMDIR(vnode_t, vnode_t, struct componentname *, vfs_context_t);
#ifdef KERNEL_PRIVATE
struct vnop_compound_rmdir_args {
struct vnodeop_desc *a_desc;
- vnode_t a_dvp; /* Directory in which to look up and delete */
- vnode_t *a_vpp; /* Destination for found vnode */
- struct componentname *a_cnp; /* Name to delete */
- struct vnode_attr *a_vap; /* Location in which to store attributes if delete succeeds (can be NULL) */
- uint32_t a_flags; /* Control flags (currently unused) */
- vfs_context_t a_context; /* Context for authorization */
- int (*a_rmdir_authorizer)( /* Authorization callback */
- vnode_t dvp, /* As passed to VNOP */
- vnode_t vp, /* Directory to delete */
- struct componentname *cnp, /* As passed to VNOP */
- vfs_context_t ctx, /* As passed to VNOP */
- void *reserved); /* Always NULL */
- void *a_reserved; /* Unused */
+ vnode_t a_dvp; /* Directory in which to look up and delete */
+ vnode_t *a_vpp; /* Destination for found vnode */
+ struct componentname *a_cnp; /* Name to delete */
+ struct vnode_attr *a_vap; /* Location in which to store attributes if delete succeeds (can be NULL) */
+ uint32_t a_flags; /* Control flags (currently unused) */
+ vfs_context_t a_context; /* Context for authorization */
+ int (*a_rmdir_authorizer)( /* Authorization callback */
+ vnode_t dvp, /* As passed to VNOP */
+ vnode_t vp, /* Directory to delete */
+ struct componentname *cnp, /* As passed to VNOP */
+ vfs_context_t ctx, /* As passed to VNOP */
+ void *reserved); /* Always NULL */
+ void *a_reserved; /* Unused */
};
#endif /* KERNEL_PRIVATE */
struct vnop_symlink_args {
- struct vnodeop_desc *a_desc;
- vnode_t a_dvp;
- vnode_t *a_vpp;
- struct componentname *a_cnp;
- struct vnode_attr *a_vap;
- char *a_target;
- vfs_context_t a_context;
+ struct vnodeop_desc *a_desc;
+ vnode_t a_dvp;
+ vnode_t *a_vpp;
+ struct componentname *a_cnp;
+ struct vnode_attr *a_vap;
+ char *a_target;
+ vfs_context_t a_context;
};
/*!
- @function VNOP_SYMLINK
- @abstract Call down to a filesystem to create a symbolic link.
- @param If VNOP_SYMLINK() is successful, the new file should be returned with an iocount which will
- be dropped by the caller. VFS does not ensure that the target path will have a length shorter
- than the max symlink length for the filesystem.
- @param dvp Parent directory for new symlink file.
- @param vpp
- @param cnp Name information for new symlink.
- @param vap Attributes for symlink.
- @param target Path for symlink to store; for "ln -s /var/vardir linktovardir", "target" would be "/var/vardir"
- @param ctx Context to authenticate for symlink request.
- @return 0 for success, else an error code.
+ * @function VNOP_SYMLINK
+ * @abstract Call down to a filesystem to create a symbolic link.
+ * @param If VNOP_SYMLINK() is successful, the new file should be returned with an iocount which will
+ * be dropped by the caller. VFS does not ensure that the target path will have a length shorter
+ * than the max symlink length for the filesystem.
+ * @param dvp Parent directory for new symlink file.
+ * @param vpp
+ * @param cnp Name information for new symlink.
+ * @param vap Attributes for symlink.
+ * @param target Path for symlink to store; for "ln -s /var/vardir linktovardir", "target" would be "/var/vardir"
+ * @param ctx Context to authenticate for symlink request.
+ * @return 0 for success, else an error code.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_SYMLINK(vnode_t, vnode_t *, struct componentname *, struct vnode_attr *, char *, vfs_context_t);
};
/*!
- @function VNOP_READDIR
- @abstract Call down to a filesystem to enumerate directory entries.
- @discussion VNOP_READDIR() packs a buffer with "struct dirent" directory entry representations as described
- by the "getdirentries" manual page.
- @param vp Directory to enumerate.
- @param uio Destination information for resulting direntries.
- @param flags VNODE_READDIR_EXTENDED, VNODE_READDIR_REQSEEKOFF, VNODE_READDIR_SEEKOFF32: Apple-internal flags.
- @param eofflag Should be set to 1 if the end of the directory has been reached.
- @param numdirent Should be set to number of entries written into buffer.
- @param ctx Context to authenticate for readdir request.
- @return 0 for success, else an error code.
+ * @function VNOP_READDIR
+ * @abstract Call down to a filesystem to enumerate directory entries.
+ * @discussion VNOP_READDIR() packs a buffer with "struct dirent" directory entry representations as described
+ * by the "getdirentries" manual page.
+ * @param vp Directory to enumerate.
+ * @param uio Destination information for resulting direntries.
+ * @param flags VNODE_READDIR_EXTENDED, VNODE_READDIR_REQSEEKOFF, VNODE_READDIR_SEEKOFF32: Apple-internal flags.
+ * @param eofflag Should be set to 1 if the end of the directory has been reached.
+ * @param numdirent Should be set to number of entries written into buffer.
+ * @param ctx Context to authenticate for readdir request.
+ * @return 0 for success, else an error code.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_READDIR(vnode_t, struct uio *, int, int *, int *, vfs_context_t);
};
/*!
- @function VNOP_READDIRATTR
- @abstract Call down to get file attributes for many files in a directory at once.
- @discussion VNOP_READDIRATTR() packs a buffer with file attributes, as if the results of many "getattrlist" calls.
- @param vp Directory in which to enumerate entries' attributes.
- @param alist Which attributes are wanted for each directory entry.
- @param uio Destination information for resulting attributes.
- @param maxcount Maximum count of files to get attributes for.
- @param options FSOPT_NOFOLLOW: do not follow symbolic links. FSOPT_NOINMEMUPDATE: do not use data which have been
- updated since an inode was loaded into memory.
- @param newstate The "newstate" should be set to a value which changes if the contents of a directory change
- through an addition or deletion but stays the same otherwise.
- @param eofflag Should be set to 1 if the end of the directory has been reached.
- @param actualcount Should be set to number of files whose attributes were written into buffer.
- @param ctx Context to authenticate for readdirattr request.
- @return 0 for success, else an error code.
+ * @function VNOP_READDIRATTR
+ * @abstract Call down to get file attributes for many files in a directory at once.
+ * @discussion VNOP_READDIRATTR() packs a buffer with file attributes, as if the results of many "getattrlist" calls.
+ * @param vp Directory in which to enumerate entries' attributes.
+ * @param alist Which attributes are wanted for each directory entry.
+ * @param uio Destination information for resulting attributes.
+ * @param maxcount Maximum count of files to get attributes for.
+ * @param options FSOPT_NOFOLLOW: do not follow symbolic links. FSOPT_NOINMEMUPDATE: do not use data which have been
+ * updated since an inode was loaded into memory.
+ * @param newstate The "newstate" should be set to a value which changes if the contents of a directory change
+ * through an addition or deletion but stays the same otherwise.
+ * @param eofflag Should be set to 1 if the end of the directory has been reached.
+ * @param actualcount Should be set to number of files whose attributes were written into buffer.
+ * @param ctx Context to authenticate for readdirattr request.
+ * @return 0 for success, else an error code.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_READDIRATTR(vnode_t, struct attrlist *, struct uio *, uint32_t, uint32_t, uint32_t *, int *, uint32_t *, vfs_context_t);
};
/*!
- @function VNOP_GETATTRLISTBULK
- @abstract Call down to get file attributes for many files in a directory at once.
- @discussion VNOP_GETATTRLISTBULK() packs a buffer with file attributes, as if the results of many "getattrlist" calls.
- @param vp Directory in which to enumerate entries' attributes.
- @param alist Which attributes are wanted for each directory entry.
- @param uio Destination information for resulting attributes.
- @param vap initialised vnode_attr structure pointer. This structure also has memory allocated (MAXPATHLEN bytes) and assigned to the va_name field for filesystems to use.
- @param private reserved for future use.
- @param options
- @param eofflag Should be set to 1 if the end of the directory has been reached.
- @param actualcount Should be set to number of files whose attributes were written into buffer.
- @param ctx Context to authenticate for getattrlistbulk request.
- @return 0 for success, else an error code.
+ * @function VNOP_GETATTRLISTBULK
+ * @abstract Call down to get file attributes for many files in a directory at once.
+ * @discussion VNOP_GETATTRLISTBULK() packs a buffer with file attributes, as if the results of many "getattrlist" calls.
+ * @param vp Directory in which to enumerate entries' attributes.
+ * @param alist Which attributes are wanted for each directory entry.
+ * @param uio Destination information for resulting attributes.
+ * @param vap initialised vnode_attr structure pointer. This structure also has memory allocated (MAXPATHLEN bytes) and assigned to the va_name field for filesystems to use.
+ * @param private reserved for future use.
+ * @param options
+ * @param eofflag Should be set to 1 if the end of the directory has been reached.
+ * @param actualcount Should be set to number of files whose attributes were written into buffer.
+ * @param ctx Context to authenticate for getattrlistbulk request.
+ * @return 0 for success, else an error code.
*/
#ifdef XNU_KERNEL_PRIVATE
-extern errno_t VNOP_GETATTRLISTBULK(vnode_t, struct attrlist *, struct vnode_attr *, uio_t, void *, uint64_t, int32_t *, int32_t *, vfs_context_t);
+extern errno_t VNOP_GETATTRLISTBULK(vnode_t, struct attrlist *, struct vnode_attr *, uio_t, void *, uint64_t, int32_t *, int32_t *, vfs_context_t);
#endif /* XNU_KERNEL_PRIVATE */
struct vnop_readlink_args {
};
/*!
- @function VNOP_READLINK
- @abstract Call down to a filesystem to get the pathname represented by a symbolic link.
- @discussion VNOP_READLINK() gets the path stored in a symbolic link; it is called by namei() and the readlink() system call.
- @param vp Symbolic link to read from.
- @param uio Destination information for link path.
- @param ctx Context to authenticate for readlink request.
- @return 0 for success, else an error code.
+ * @function VNOP_READLINK
+ * @abstract Call down to a filesystem to get the pathname represented by a symbolic link.
+ * @discussion VNOP_READLINK() gets the path stored in a symbolic link; it is called by namei() and the readlink() system call.
+ * @param vp Symbolic link to read from.
+ * @param uio Destination information for link path.
+ * @param ctx Context to authenticate for readlink request.
+ * @return 0 for success, else an error code.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_READLINK(vnode_t, struct uio *, vfs_context_t);
};
/*!
- @function VNOP_INACTIVE
- @abstract Notify a filesystem that the last usecount (persistent reference) on a vnode has been dropped.
- @discussion VNOP_INACTVE() gives a filesystem a chance to aggressively release resources assocated with a vnode, perhaps
- even to call vnode_recycle(), but no action is prescribed; it is acceptable for VNOP_INACTIVE to be a no-op and
- to defer all reclamation until VNOP_RECLAIM().
- VNOP_INACTVE() will not be called on a vnode if no persistent reference is ever taken; an
- important example is a stat(), which takes an iocount, reads its data, and drops that iocount.
- @param vp The vnode which is now inactive.
- @param ctx Context to authenticate for inactive message.
- @return 0 for success, else an error code, but return value is currently ignored.
+ * @function VNOP_INACTIVE
+ * @abstract Notify a filesystem that the last usecount (persistent reference) on a vnode has been dropped.
+ * @discussion VNOP_INACTVE() gives a filesystem a chance to aggressively release resources assocated with a vnode, perhaps
+ * even to call vnode_recycle(), but no action is prescribed; it is acceptable for VNOP_INACTIVE to be a no-op and
+ * to defer all reclamation until VNOP_RECLAIM().
+ * VNOP_INACTVE() will not be called on a vnode if no persistent reference is ever taken; an
+ * important example is a stat(), which takes an iocount, reads its data, and drops that iocount.
+ * @param vp The vnode which is now inactive.
+ * @param ctx Context to authenticate for inactive message.
+ * @return 0 for success, else an error code, but return value is currently ignored.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_INACTIVE(vnode_t, vfs_context_t);
};
/*!
- @function VNOP_RECLAIM
- @abstract Release filesystem-internal resources for a vnode.
- @discussion VNOP_RECLAIM() is called as part of the process of recycling a vnode. During
- a reclaim routine, a filesystem should remove a vnode from its hash and deallocate any resources
- allocated to that vnode. VFS guarantees that when VNOP_RECLAIM() is called, there are no more
- iocount references on a vnode (though there may still be usecount references--these are invalidated
- by the reclaim) and that no more will be granted. This means in practice that there will be no
- filesystem calls on the vnode being reclaimed until the reclaim has finished and the vnode has
- been reused.
- @param vp The vnode to reclaim.
- @param ctx Context to authenticate for reclaim.
- @return 0 for success, or an error code. A nonzero return value results in a panic.
+ * @function VNOP_RECLAIM
+ * @abstract Release filesystem-internal resources for a vnode.
+ * @discussion VNOP_RECLAIM() is called as part of the process of recycling a vnode. During
+ * a reclaim routine, a filesystem should remove a vnode from its hash and deallocate any resources
+ * allocated to that vnode. VFS guarantees that when VNOP_RECLAIM() is called, there are no more
+ * iocount references on a vnode (though there may still be usecount references--these are invalidated
+ * by the reclaim) and that no more will be granted. This means in practice that there will be no
+ * filesystem calls on the vnode being reclaimed until the reclaim has finished and the vnode has
+ * been reused.
+ * @param vp The vnode to reclaim.
+ * @param ctx Context to authenticate for reclaim.
+ * @return 0 for success, or an error code. A nonzero return value results in a panic.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_RECLAIM(vnode_t, vfs_context_t);
};
/*!
- @function VNOP_PATHCONF
- @abstract Query a filesystem for path properties.
- @param vp The vnode whose filesystem to query.
- @param name Which property to request: see unistd.h. For example: _PC_CASE_SENSITIVE (is
- a filesystem case-sensitive?). Only one property can be requested at a time.
- @param retval Destination for value of property.
- @param ctx Context to authenticate for pathconf request.
- @return 0 for success, or an error code.
+ * @function VNOP_PATHCONF
+ * @abstract Query a filesystem for path properties.
+ * @param vp The vnode whose filesystem to query.
+ * @param name Which property to request: see unistd.h. For example: _PC_CASE_SENSITIVE (is
+ * a filesystem case-sensitive?). Only one property can be requested at a time.
+ * @param retval Destination for value of property.
+ * @param ctx Context to authenticate for pathconf request.
+ * @return 0 for success, or an error code.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_PATHCONF(vnode_t, int, int32_t *, vfs_context_t);
};
/*!
- @function VNOP_ADVLOCK
- @abstract Aquire or release and advisory lock on a vnode.
- @discussion Advisory locking is somewhat complicated. VNOP_ADVLOCK is overloaded for
- both flock() and POSIX advisory locking usage, though not all filesystems support both (or any). VFS
- provides an advisory locking mechanism for filesystems which can take advantage of it; vfs_setlocklocal()
- marks a filesystem as using VFS advisory locking support.
- @param vp The vnode to lock or unlock.
- @param id Identifier for lock holder: ignored by most filesystems.
- @param op Which locking operation: F_SETLK: set locking information about a region.
- F_GETLK: get locking information about the specified region. F_UNLCK: Unlock a region.
- @param fl Description of file region to lock. l_whence is as with "lseek."
- Includes a type: F_RDLCK (shared lock), F_UNLCK (unlock) , and F_WRLCK (exclusive lock).
- @param flags F_FLOCK: use flock() semantics. F_POSIX: use POSIX semantics. F_WAIT: sleep if necessary.
- F_PROV: Non-coelesced provisional lock (unused in xnu).
- @param ctx Context to authenticate for advisory locking request.
- @param timeout Timespec for timeout in case of F_SETLKWTIMEOUT.
- @return 0 for success, or an error code.
+ * @function VNOP_ADVLOCK
+ * @abstract Aquire or release and advisory lock on a vnode.
+ * @discussion Advisory locking is somewhat complicated. VNOP_ADVLOCK is overloaded for
+ * both flock() and POSIX advisory locking usage, though not all filesystems support both (or any). VFS
+ * provides an advisory locking mechanism for filesystems which can take advantage of it; vfs_setlocklocal()
+ * marks a filesystem as using VFS advisory locking support.
+ * @param vp The vnode to lock or unlock.
+ * @param id Identifier for lock holder: ignored by most filesystems.
+ * @param op Which locking operation: F_SETLK: set locking information about a region.
+ * F_GETLK: get locking information about the specified region. F_UNLCK: Unlock a region.
+ * @param fl Description of file region to lock. l_whence is as with "lseek."
+ * Includes a type: F_RDLCK (shared lock), F_UNLCK (unlock) , and F_WRLCK (exclusive lock).
+ * @param flags F_FLOCK: use flock() semantics. F_POSIX: use POSIX semantics. F_WAIT: sleep if necessary.
+ * F_PROV: Non-coelesced provisional lock (unused in xnu).
+ * @param ctx Context to authenticate for advisory locking request.
+ * @param timeout Timespec for timeout in case of F_SETLKWTIMEOUT.
+ * @return 0 for success, or an error code.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_ADVLOCK(vnode_t, caddr_t, int, struct flock *, int, vfs_context_t, struct timespec *);
};
/*!
- @function VNOP_ALLOCATE
- @abstract Pre-allocate space for a file.
- @discussion VNOP_ALLOCATE() changes the amount of backing store set aside to
- a file. It can be used to either shrink or grow a file. If the file shrinks,
- its ubc size will be modified accordingly, but if it grows, then the ubc size is unchanged;
- space is set aside without being actively used by the file. VNOP_ALLOCATE() is currently only
- called as part of the F_PREALLOCATE fcntl.
- @param vp The vnode for which to preallocate space.
- @param length Desired preallocated file length.
- @param flags
- PREALLOCATE: preallocate allocation blocks.
- ALLOCATECONTIG: allocate contigious space.
- ALLOCATEALL: allocate all requested space or no space at all.
- FREEREMAINDER: deallocate allocated but unfilled blocks.
- ALLOCATEFROMPEOF: allocate from the physical eof.
- ALLOCATEFROMVOL: allocate from the volume offset.
- @param bytesallocated Additional bytes set aside for file. Set to 0 if none are allocated
- OR if the file is contracted.
- @param offset Hint for where to find free blocks.
- @param ctx Context to authenticate for allocation request.
- @return 0 for success, or an error code.
+ * @function VNOP_ALLOCATE
+ * @abstract Pre-allocate space for a file.
+ * @discussion VNOP_ALLOCATE() changes the amount of backing store set aside to
+ * a file. It can be used to either shrink or grow a file. If the file shrinks,
+ * its ubc size will be modified accordingly, but if it grows, then the ubc size is unchanged;
+ * space is set aside without being actively used by the file. VNOP_ALLOCATE() is currently only
+ * called as part of the F_PREALLOCATE fcntl.
+ * @param vp The vnode for which to preallocate space.
+ * @param length Desired preallocated file length.
+ * @param flags
+ * PREALLOCATE: preallocate allocation blocks.
+ * ALLOCATECONTIG: allocate contigious space.
+ * ALLOCATEALL: allocate all requested space or no space at all.
+ * FREEREMAINDER: deallocate allocated but unfilled blocks.
+ * ALLOCATEFROMPEOF: allocate from the physical eof.
+ * ALLOCATEFROMVOL: allocate from the volume offset.
+ * @param bytesallocated Additional bytes set aside for file. Set to 0 if none are allocated
+ * OR if the file is contracted.
+ * @param offset Hint for where to find free blocks.
+ * @param ctx Context to authenticate for allocation request.
+ * @return 0 for success, or an error code.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_ALLOCATE(vnode_t, off_t, u_int32_t, off_t *, off_t, vfs_context_t);
};
/*!
- @function VNOP_PAGEIN
- @abstract Pull file data into memory.
- @discussion VNOP_PAGEIN() is called by when a process faults on data mapped from a file or
- when madvise() demands pre-fetching. It is conceptually somewhat similar to VNOP_READ(). Filesystems
- are typically expected to call cluster_pagein() to handle the labor of mapping and committing the UPL.
- @param vp The vnode for which to page in data.
- @param pl UPL describing pages needing to be paged in.
- @param pl_offset Offset in UPL at which to start placing data.
- @param f_offset Offset in file of data needing to be paged in.
- @param size Amount of data to page in (in bytes).
- @param flags UPL-style flags: UPL_IOSYNC, UPL_NOCOMMIT, UPL_NORDAHEAD, UPL_VNODE_PAGER, UPL_MSYNC.
- Filesystems should generally leave it to the cluster layer to handle these flags. See the
- memory_object_types.h header in the kernel framework if interested.
- @param ctx Context to authenticate for pagein request.
- @return 0 for success, or an error code.
+ * @function VNOP_PAGEIN
+ * @abstract Pull file data into memory.
+ * @discussion VNOP_PAGEIN() is called by when a process faults on data mapped from a file or
+ * when madvise() demands pre-fetching. It is conceptually somewhat similar to VNOP_READ(). Filesystems
+ * are typically expected to call cluster_pagein() to handle the labor of mapping and committing the UPL.
+ * @param vp The vnode for which to page in data.
+ * @param pl UPL describing pages needing to be paged in.
+ * @param pl_offset Offset in UPL at which to start placing data.
+ * @param f_offset Offset in file of data needing to be paged in.
+ * @param size Amount of data to page in (in bytes).
+ * @param flags UPL-style flags: UPL_IOSYNC, UPL_NOCOMMIT, UPL_NORDAHEAD, UPL_VNODE_PAGER, UPL_MSYNC.
+ * Filesystems should generally leave it to the cluster layer to handle these flags. See the
+ * memory_object_types.h header in the kernel framework if interested.
+ * @param ctx Context to authenticate for pagein request.
+ * @return 0 for success, or an error code.
*/
#ifdef XNU_KERNEL_PRIVATE
-extern errno_t VNOP_PAGEIN(vnode_t, upl_t, upl_offset_t, off_t, size_t, int, vfs_context_t);
+extern errno_t VNOP_PAGEIN(vnode_t, upl_t, upl_offset_t, off_t, size_t, int, vfs_context_t);
#endif /* XNU_KERNEL_PRIVATE */
struct vnop_pageout_args {
};
/*!
- @function VNOP_PAGEOUT
- @abstract Write data from a mapped file back to disk.
- @discussion VNOP_PAGEOUT() is called when data from a mapped file needs to be flushed to disk, either
- because of an msync() call or due to memory pressure. Filesystems are for the most part expected to
- just call cluster_pageout(). However, if they opt into the VFC_VFSVNOP_PAGEOUTV2 flag, then
- they will be responsible for creating their own UPLs.
- @param vp The vnode for which to page out data.
- @param pl UPL describing pages needed to be paged out. If UPL is NULL, then it means the filesystem
- has opted into VFC_VFSVNOP_PAGEOUTV2 semantics, which means that it will create and operate on its own UPLs
- as opposed to relying on the one passed down into the filesystem. This means that the filesystem must be
- responsible for N cluster_pageout calls for N dirty ranges in the UPL.
- @param pl_offset Offset in UPL from which to start paging out data. Under the new VFC_VFSVNOP_PAGEOUTV2
- semantics, this is the offset in the range specified that must be paged out if the associated page is dirty.
- @param f_offset Offset in file of data needing to be paged out. Under the new VFC_VFSVNOP_PAGEOUTV2
- semantics, this represents the offset in the file where we should start looking for dirty pages.
- @param size Amount of data to page out (in bytes). Under VFC_VFSVNOP_PAGEOUTV2, this represents
- the size of the range to be considered. The fileystem is free to extend or shrink the specified range
- to better fit its blocking model as long as the page at 'pl_offset' is included.
- @param flags UPL-style flags: UPL_IOSYNC, UPL_NOCOMMIT, UPL_NORDAHEAD, UPL_VNODE_PAGER, UPL_MSYNC.
- Filesystems should generally leave it to the cluster layer to handle these flags. See the
- memory_object_types.h header in the kernel framework if interested.
- @param ctx Context to authenticate for pageout request.
- @return 0 for success, or an error code.
+ * @function VNOP_PAGEOUT
+ * @abstract Write data from a mapped file back to disk.
+ * @discussion VNOP_PAGEOUT() is called when data from a mapped file needs to be flushed to disk, either
+ * because of an msync() call or due to memory pressure. Filesystems are for the most part expected to
+ * just call cluster_pageout(). However, if they opt into the VFC_VFSVNOP_PAGEOUTV2 flag, then
+ * they will be responsible for creating their own UPLs.
+ * @param vp The vnode for which to page out data.
+ * @param pl UPL describing pages needed to be paged out. If UPL is NULL, then it means the filesystem
+ * has opted into VFC_VFSVNOP_PAGEOUTV2 semantics, which means that it will create and operate on its own UPLs
+ * as opposed to relying on the one passed down into the filesystem. This means that the filesystem must be
+ * responsible for N cluster_pageout calls for N dirty ranges in the UPL.
+ * @param pl_offset Offset in UPL from which to start paging out data. Under the new VFC_VFSVNOP_PAGEOUTV2
+ * semantics, this is the offset in the range specified that must be paged out if the associated page is dirty.
+ * @param f_offset Offset in file of data needing to be paged out. Under the new VFC_VFSVNOP_PAGEOUTV2
+ * semantics, this represents the offset in the file where we should start looking for dirty pages.
+ * @param size Amount of data to page out (in bytes). Under VFC_VFSVNOP_PAGEOUTV2, this represents
+ * the size of the range to be considered. The fileystem is free to extend or shrink the specified range
+ * to better fit its blocking model as long as the page at 'pl_offset' is included.
+ * @param flags UPL-style flags: UPL_IOSYNC, UPL_NOCOMMIT, UPL_NORDAHEAD, UPL_VNODE_PAGER, UPL_MSYNC.
+ * Filesystems should generally leave it to the cluster layer to handle these flags. See the
+ * memory_object_types.h header in the kernel framework if interested.
+ * @param ctx Context to authenticate for pageout request.
+ * @return 0 for success, or an error code.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_PAGEOUT(vnode_t, upl_t, upl_offset_t, off_t, size_t, int, vfs_context_t);
};
/*
- @function VNOP_SEARCHFS
- @abstract Search a filesystem quickly for files or directories that match the passed-in search criteria.
- @discussion VNOP_SEARCHFS is a getattrlist-based system call which is implemented almost entirely inside
- supported filesystems. Callers provide a set of criteria to match against, and the filesystem is responsible
- for finding all files or directories that match the criteria. Once these files or directories are found,
- the user-requested attributes of these files is provided as output. The set of searchable attributes is a
- subset of the getattrlist attributes. For example, ATTR_CMN_UUID is not a valid searchable attribute as of
- 10.6. A common usage scenario could be to request all files whose mod dates is greater than time X, less than
- time Y, and provide the inode ID and filename of the matching objects as output.
- @param vp The vnode representing the mountpoint of the filesystem to be searched.
- @param a_searchparams1 If one-argument search criteria is requested, the search criteria would go here. However,
- some search criteria, like ATTR_CMN_MODTIME, can be bounded. The user could request files modified between time X
- and time Y. In this case, the lower bound goes in a_searchparams1.
- @param a_searchparams2 If two-argument search criteria is requested, the upper bound goes in here.
- @param a_searchattrs Contains the getattrlist-style attribute bits which are requested by the current search.
- @param a_maxmatches The maximum number of matches to return in a single system call.
- @param a_timelimit The suggested maximum amount of time we can spend in the kernel to service this system call.
- Filesystems should use this as a guide only, and set their own internal maximum time to avoid denial of service.
- @param a_returnattrs The getattrlist-style attributes to return for items in the filesystem that match the search
- criteria above.
- @param a_scriptcode Currently ignored.
- @param a_uio The uio in which to write out the search matches.
- @param a_searchstate Sometimes searches cannot be completed in a single system call. In this case, we provide
- an identifier back to the user which indicates where to resume a previously-started search. This is an opaque structure
- used by the filesystem to identify where to resume said search.
- @param a_context The context in which to perform the filesystem search.
- @return 0 on success, EAGAIN for searches which could not be completed in 1 call, and other ERRNOS as needed.
+ * @function VNOP_SEARCHFS
+ * @abstract Search a filesystem quickly for files or directories that match the passed-in search criteria.
+ * @discussion VNOP_SEARCHFS is a getattrlist-based system call which is implemented almost entirely inside
+ * supported filesystems. Callers provide a set of criteria to match against, and the filesystem is responsible
+ * for finding all files or directories that match the criteria. Once these files or directories are found,
+ * the user-requested attributes of these files is provided as output. The set of searchable attributes is a
+ * subset of the getattrlist attributes. For example, ATTR_CMN_UUID is not a valid searchable attribute as of
+ * 10.6. A common usage scenario could be to request all files whose mod dates is greater than time X, less than
+ * time Y, and provide the inode ID and filename of the matching objects as output.
+ * @param vp The vnode representing the mountpoint of the filesystem to be searched.
+ * @param a_searchparams1 If one-argument search criteria is requested, the search criteria would go here. However,
+ * some search criteria, like ATTR_CMN_MODTIME, can be bounded. The user could request files modified between time X
+ * and time Y. In this case, the lower bound goes in a_searchparams1.
+ * @param a_searchparams2 If two-argument search criteria is requested, the upper bound goes in here.
+ * @param a_searchattrs Contains the getattrlist-style attribute bits which are requested by the current search.
+ * @param a_maxmatches The maximum number of matches to return in a single system call.
+ * @param a_timelimit The suggested maximum amount of time we can spend in the kernel to service this system call.
+ * Filesystems should use this as a guide only, and set their own internal maximum time to avoid denial of service.
+ * @param a_returnattrs The getattrlist-style attributes to return for items in the filesystem that match the search
+ * criteria above.
+ * @param a_scriptcode Currently ignored.
+ * @param a_uio The uio in which to write out the search matches.
+ * @param a_searchstate Sometimes searches cannot be completed in a single system call. In this case, we provide
+ * an identifier back to the user which indicates where to resume a previously-started search. This is an opaque structure
+ * used by the filesystem to identify where to resume said search.
+ * @param a_context The context in which to perform the filesystem search.
+ * @return 0 on success, EAGAIN for searches which could not be completed in 1 call, and other ERRNOS as needed.
*/
#ifdef XNU_KERNEL_PRIVATE
struct vnode_attr *a_vap;
uint32_t a_flags;
vfs_context_t a_context;
- int (*a_dir_clone_authorizer)( /* Authorization callback */
- struct vnode_attr *vap, /* attribute to be authorized */
- kauth_action_t action, /* action for which attribute is to be authorized */
- struct vnode_attr *dvap, /* target directory attributes */
- vnode_t sdvp, /* source directory vnode pointer (optional) */
- mount_t mp, /* mount point of filesystem */
- dir_clone_authorizer_op_t vattr_op, /* specific operation requested : setup, authorization or cleanup */
- vfs_context_t ctx, /* As passed to VNOP */
- void *reserved); /* Always NULL */
- void *a_reserved; /* Currently unused */
+ int (*a_dir_clone_authorizer)( /* Authorization callback */
+ struct vnode_attr *vap, /* attribute to be authorized */
+ kauth_action_t action, /* action for which attribute is to be authorized */
+ struct vnode_attr *dvap, /* target directory attributes */
+ vnode_t sdvp, /* source directory vnode pointer (optional) */
+ mount_t mp, /* mount point of filesystem */
+ dir_clone_authorizer_op_t vattr_op, /* specific operation requested : setup, authorization or cleanup */
+ uint32_t flags, /* needs to have the value passed to a_flags */
+ vfs_context_t ctx, /* As passed to VNOP */
+ void *reserved); /* Always NULL */
+ void *a_reserved; /* Currently unused */
};
/*!
- @function VNOP_CLONEFILE
- @abstract Call down to a filesystem to clone a filesystem object (regular file, directory or symbolic link.)
- @discussion If file creation succeeds, "vpp" should be returned with an iocount to be dropped by the caller.
- @param dvp Directory in which to clone object.
- @param vpp Destination for vnode for newly cloned object.
- @param cnp Description of name of object to clone.
- @param vap File creation properties, as seen in vnode_getattr(). Manipulated with VATTR_ISACTIVE, VATTR_RETURN,
- VATTR_SET_SUPPORTED, and so forth. All attributes not set here should either be copied
- from the source object
- or set to values which are used for creating new filesystem objects
- @param ctx Context against which to authenticate file creation.
- @return 0 for success or a filesystem-specific error.
+ * @function VNOP_CLONEFILE
+ * @abstract Call down to a filesystem to clone a filesystem object (regular file, directory or symbolic link.)
+ * @discussion If file creation succeeds, "vpp" should be returned with an iocount to be dropped by the caller.
+ * @param dvp Directory in which to clone object.
+ * @param vpp Destination for vnode for newly cloned object.
+ * @param cnp Description of name of object to clone.
+ * @param vap File creation properties, as seen in vnode_getattr(). Manipulated with VATTR_ISACTIVE, VATTR_RETURN,
+ * VATTR_SET_SUPPORTED, and so forth. All attributes not set here should either be copied
+ * from the source object
+ * or set to values which are used for creating new filesystem objects
+ * @param ctx Context against which to authenticate file creation.
+ * @return 0 for success or a filesystem-specific error.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_CLONEFILE(vnode_t, vnode_t, vnode_t *, struct componentname *, struct vnode_attr *, uint32_t, vfs_context_t);
extern struct vnodeop_desc vnop_getxattr_desc;
/*!
- @function VNOP_GETXATTR
- @abstract Get extended file attributes.
- @param vp The vnode to get extended attributes for.
- @param name Which property to extract.
- @param uio Destination information for attribute value.
- @param size Should be set to the amount of data written.
- @param options XATTR_NOSECURITY: bypass security-checking.
- @param ctx Context to authenticate for getxattr request.
- @return 0 for success, or an error code.
+ * @function VNOP_GETXATTR
+ * @abstract Get extended file attributes.
+ * @param vp The vnode to get extended attributes for.
+ * @param name Which property to extract.
+ * @param uio Destination information for attribute value.
+ * @param size Should be set to the amount of data written.
+ * @param options XATTR_NOSECURITY: bypass security-checking.
+ * @param ctx Context to authenticate for getxattr request.
+ * @return 0 for success, or an error code.
*/
extern errno_t VNOP_GETXATTR(vnode_t vp, const char *name, uio_t uio, size_t *size, int options, vfs_context_t ctx);
extern struct vnodeop_desc vnop_setxattr_desc;
/*!
- @function VNOP_SETXATTR
- @abstract Set extended file attributes.
- @param vp The vnode to set extended attributes for.
- @param name Which property to extract.
- @param uio Source information for attribute value.
- @param options XATTR_NOSECURITY: bypass security-checking. XATTR_CREATE: set value, fail if exists.
- XATTR_REPLACE: set value, fail if does not exist.
- @param ctx Context to authenticate for setxattr request.
- @return 0 for success, or an error code.
+ * @function VNOP_SETXATTR
+ * @abstract Set extended file attributes.
+ * @param vp The vnode to set extended attributes for.
+ * @param name Which property to extract.
+ * @param uio Source information for attribute value.
+ * @param options XATTR_NOSECURITY: bypass security-checking. XATTR_CREATE: set value, fail if exists.
+ * XATTR_REPLACE: set value, fail if does not exist.
+ * @param ctx Context to authenticate for setxattr request.
+ * @return 0 for success, or an error code.
*/
extern errno_t VNOP_SETXATTR(vnode_t vp, const char *name, uio_t uio, int options, vfs_context_t ctx);
extern struct vnodeop_desc vnop_removexattr_desc;
/*!
- @function VNOP_REMOVEXATTR
- @abstract Remove extended file attributes.
- @param vp The vnode from which to remove extended attributes.
- @param name Which attribute to delete.
- @param options XATTR_NOSECURITY: bypass security-checking.
- @param ctx Context to authenticate for attribute delete request.
- @return 0 for success, or an error code.
+ * @function VNOP_REMOVEXATTR
+ * @abstract Remove extended file attributes.
+ * @param vp The vnode from which to remove extended attributes.
+ * @param name Which attribute to delete.
+ * @param options XATTR_NOSECURITY: bypass security-checking.
+ * @param ctx Context to authenticate for attribute delete request.
+ * @return 0 for success, or an error code.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_REMOVEXATTR(vnode_t, const char *, int, vfs_context_t);
extern struct vnodeop_desc vnop_listxattr_desc;
/*!
- @function VNOP_LISTXATTR
- @abstract List extended attribute keys.
- @discussion Should write a sequence of unseparated, null-terminated extended-attribute
- names into the space described by the provided uio. These keys can then be passed to
- getxattr() (and VNOP_GETXATTR()).
- @param vp The vnode for which to get extended attribute keys.
- @param uio Description of target memory for attribute keys.
- @param size Should be set to amount of data written to buffer.
- @param options XATTR_NOSECURITY: bypass security checking.
- @param ctx Context to authenticate for attribute name request.
+ * @function VNOP_LISTXATTR
+ * @abstract List extended attribute keys.
+ * @discussion Should write a sequence of unseparated, null-terminated extended-attribute
+ * names into the space described by the provided uio. These keys can then be passed to
+ * getxattr() (and VNOP_GETXATTR()).
+ * @param vp The vnode for which to get extended attribute keys.
+ * @param uio Description of target memory for attribute keys.
+ * @param size Should be set to amount of data written to buffer.
+ * @param options XATTR_NOSECURITY: bypass security checking.
+ * @param ctx Context to authenticate for attribute name request.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_LISTXATTR(vnode_t, uio_t, size_t *, int, vfs_context_t);
};
/*!
- @function VNOP_BLKTOOFF
- @abstract Call down to a filesystem to convert a logical block number to a file offset.
- @discussion VNOP_BLKTOOFF() converts a logical block to a file offset in bytes. That offset
- can be passed to VNOP_BLOCKMAP(), then, to get a physical block number--buf_strategy() does this.
- @param vp The vnode for which to convert a logical block to an offset.
- @param lblkno Logical block number to turn into offset.
- @param offset Destination for file offset.
- @return 0 for success, else an error code.
+ * @function VNOP_BLKTOOFF
+ * @abstract Call down to a filesystem to convert a logical block number to a file offset.
+ * @discussion VNOP_BLKTOOFF() converts a logical block to a file offset in bytes. That offset
+ * can be passed to VNOP_BLOCKMAP(), then, to get a physical block number--buf_strategy() does this.
+ * @param vp The vnode for which to convert a logical block to an offset.
+ * @param lblkno Logical block number to turn into offset.
+ * @param offset Destination for file offset.
+ * @return 0 for success, else an error code.
*/
#ifdef XNU_KERNEL_PRIVATE
-extern errno_t VNOP_BLKTOOFF(vnode_t, daddr64_t, off_t *);
+extern errno_t VNOP_BLKTOOFF(vnode_t, daddr64_t, off_t *);
#endif /* XNU_KERNEL_PRIVATE */
struct vnop_offtoblk_args {
};
/*!
- @function VNOP_OFFTOBLK
- @abstract Call down to a filesystem to convert a file offset to a logical block number.
- @param vp The vnode for which to convert an offset to a logical block number.
- @param offset File offset to convert.
- @param lblkno Destination for corresponding logical block number.
- @return 0 for success, else an error code.
+ * @function VNOP_OFFTOBLK
+ * @abstract Call down to a filesystem to convert a file offset to a logical block number.
+ * @param vp The vnode for which to convert an offset to a logical block number.
+ * @param offset File offset to convert.
+ * @param lblkno Destination for corresponding logical block number.
+ * @return 0 for success, else an error code.
*/
#ifdef XNU_KERNEL_PRIVATE
-extern errno_t VNOP_OFFTOBLK(vnode_t, off_t, daddr64_t *);
+extern errno_t VNOP_OFFTOBLK(vnode_t, off_t, daddr64_t *);
#endif /* XNU_KERNEL_PRIVATE */
struct vnop_blockmap_args {
};
/*!
- @function VNOP_BLOCKMAP
- @abstract Call down to a filesystem to get information about the on-disk layout of a file region.
- @discussion VNOP_BLOCKMAP() returns the information required to pass a request for a contiguous region
- down to a device's strategy routine.
- @param vp The vnode for which to get on-disk information.
- @param foffset Offset (in bytes) at which region starts.
- @param size Size of region.
- @param bpn Destination for physical block number at which region begins on disk.
- @param run Destination for number of bytes which can be found contiguously on-disk before
- first discontinuity.
- @param poff Currently unused.
- @param flags VNODE_READ: request is for a read. VNODE_WRITE: request is for a write.
- @param ctx Context to authenticate for blockmap request; currently often set to NULL.
- @return 0 for success, else an error code.
+ * @function VNOP_BLOCKMAP
+ * @abstract Call down to a filesystem to get information about the on-disk layout of a file region.
+ * @discussion VNOP_BLOCKMAP() returns the information required to pass a request for a contiguous region
+ * down to a device's strategy routine.
+ * @param vp The vnode for which to get on-disk information.
+ * @param foffset Offset (in bytes) at which region starts.
+ * @param size Size of region.
+ * @param bpn Destination for physical block number at which region begins on disk.
+ * @param run Destination for number of bytes which can be found contiguously on-disk before
+ * first discontinuity.
+ * @param poff Currently unused.
+ * @param flags VNODE_READ: request is for a read. VNODE_WRITE: request is for a write.
+ * @param ctx Context to authenticate for blockmap request; currently often set to NULL.
+ * @return 0 for success, else an error code.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_BLOCKMAP(vnode_t, off_t, size_t, daddr64_t *, size_t *, void *,
- int, vfs_context_t);
+ int, vfs_context_t);
#endif /* XNU_KERNEL_PRIVATE */
struct vnop_strategy_args {
};
/*!
- @function VNOP_STRATEGY
- @abstract Initiate I/O on a file (both read and write).
- @discussion A filesystem strategy routine takes a buffer, performs whatever manipulations are necessary for passing
- the I/O request down to the device layer, and calls the appropriate device's strategy routine. Most filesystems should
- just call buf_strategy() with "bp" as the argument.
- @param bp Complete specificiation of requested I/O: region of data involved, whether request is for read or write, and so on.
- @return 0 for success, else an error code.
+ * @function VNOP_STRATEGY
+ * @abstract Initiate I/O on a file (both read and write).
+ * @discussion A filesystem strategy routine takes a buffer, performs whatever manipulations are necessary for passing
+ * the I/O request down to the device layer, and calls the appropriate device's strategy routine. Most filesystems should
+ * just call buf_strategy() with "bp" as the argument.
+ * @param bp Complete specificiation of requested I/O: region of data involved, whether request is for read or write, and so on.
+ * @return 0 for success, else an error code.
*/
extern errno_t VNOP_STRATEGY(struct buf *bp);
};
/*!
- @function VNOP_BWRITE
- @abstract Write a buffer to backing store.
- @discussion VNOP_BWRITE() is called by buf_bawrite() (asynchronous write) and potentially by buf_bdwrite() (delayed write)
- but not by buf_bwrite(). A filesystem may choose to perform some kind of manipulation of the buffer in this routine; it
- generally will end up calling VFS's default implementation, vn_bwrite() (which calls buf_bwrite() without further ado).
- @param bp The buffer to write.
- @return 0 for success, else an error code.
+ * @function VNOP_BWRITE
+ * @abstract Write a buffer to backing store.
+ * @discussion VNOP_BWRITE() is called by buf_bawrite() (asynchronous write) and potentially by buf_bdwrite() (delayed write)
+ * but not by buf_bwrite(). A filesystem may choose to perform some kind of manipulation of the buffer in this routine; it
+ * generally will end up calling VFS's default implementation, vn_bwrite() (which calls buf_bwrite() without further ado).
+ * @param bp The buffer to write.
+ * @return 0 for success, else an error code.
*/
extern errno_t VNOP_BWRITE(buf_t bp);
extern struct vnodeop_desc vnop_kqfilt_add_desc;
#ifdef XNU_KERNEL_PRIVATE
-extern errno_t VNOP_KQFILT_ADD(vnode_t , struct knote *, vfs_context_t);
+extern errno_t VNOP_KQFILT_ADD(vnode_t, struct knote *, vfs_context_t);
#endif /* XNU_KERNEL_PRIVATE */
struct vnop_kqfilt_remove_args {
extern struct vnodeop_desc vnop_kqfilt_remove_desc;
#ifdef XNU_KERNEL_PRIVATE
-errno_t VNOP_KQFILT_REMOVE(vnode_t , uintptr_t , vfs_context_t);
+errno_t VNOP_KQFILT_REMOVE(vnode_t, uintptr_t, vfs_context_t);
#endif /* XNU_KERNEL_PRIVATE */
#ifdef KERNEL_PRIVATE
-#define VNODE_MONITOR_BEGIN 0x01
-#define VNODE_MONITOR_END 0x02
-#define VNODE_MONITOR_UPDATE 0x04
+#define VNODE_MONITOR_BEGIN 0x01
+#define VNODE_MONITOR_END 0x02
+#define VNODE_MONITOR_UPDATE 0x04
struct vnop_monitor_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
#ifdef XNU_KERNEL_PRIVATE
/*!
- @function VNOP_MONITOR
- @abstract Indicate to a filesystem that the number of watchers of a file has changed.
- @param vp The vnode whose watch state has changed.
- @param events Unused. Filesystems can ignore this parameter.
- @param flags Type of change to the watch state. VNODE_MONITOR_BEGIN is passed when the kernel
- begins tracking a new watcher of a file. VNODE_MONITOR_END is passed when a watcher stops watching a file.
- VNODE_MONITOR_UPDATE is currently unused. A filesystem is guaranteed that each VNODE_MONITOR_BEGIN
- will be matched by a VNODE_MONITOR_END with the same "handle" argument.
- @param handle Unique identifier for a given watcher. A VNODE_MONITOR_BEGIN for a given handle will be matched with a
- VNODE_MONITOR_END for the same handle; a filesystem need not consider this parameter unless
- it for some reason wants be able to match specific VNOP_MONITOR calls rather than just keeping
- a count.
- @param ctx The context which is starting to monitor a file or ending a watch on a file. A matching
- pair of VNODE_MONITOR_BEGIN and VNODE_MONITOR_END need not have the same context.
- @discussion VNOP_MONITOR() is intended to let networked filesystems know when they should bother
- listening for changes to files which occur remotely, so that they can post notifications using
- vnode_notify(). Local filesystems should not implement a monitor vnop.
- It is called when there is a new watcher for a file or when a watcher for a file goes away.
- Each BEGIN will be matched with an END with the same handle. Note that vnode_ismonitored() can
- be used to see if there are currently watchers for a file.
+ * @function VNOP_MONITOR
+ * @abstract Indicate to a filesystem that the number of watchers of a file has changed.
+ * @param vp The vnode whose watch state has changed.
+ * @param events Unused. Filesystems can ignore this parameter.
+ * @param flags Type of change to the watch state. VNODE_MONITOR_BEGIN is passed when the kernel
+ * begins tracking a new watcher of a file. VNODE_MONITOR_END is passed when a watcher stops watching a file.
+ * VNODE_MONITOR_UPDATE is currently unused. A filesystem is guaranteed that each VNODE_MONITOR_BEGIN
+ * will be matched by a VNODE_MONITOR_END with the same "handle" argument.
+ * @param handle Unique identifier for a given watcher. A VNODE_MONITOR_BEGIN for a given handle will be matched with a
+ * VNODE_MONITOR_END for the same handle; a filesystem need not consider this parameter unless
+ * it for some reason wants be able to match specific VNOP_MONITOR calls rather than just keeping
+ * a count.
+ * @param ctx The context which is starting to monitor a file or ending a watch on a file. A matching
+ * pair of VNODE_MONITOR_BEGIN and VNODE_MONITOR_END need not have the same context.
+ * @discussion VNOP_MONITOR() is intended to let networked filesystems know when they should bother
+ * listening for changes to files which occur remotely, so that they can post notifications using
+ * vnode_notify(). Local filesystems should not implement a monitor vnop.
+ * It is called when there is a new watcher for a file or when a watcher for a file goes away.
+ * Each BEGIN will be matched with an END with the same handle. Note that vnode_ismonitored() can
+ * be used to see if there are currently watchers for a file.
*/
errno_t VNOP_MONITOR(vnode_t vp, uint32_t events, uint32_t flags, void *handle, vfs_context_t ctx);
#endif /* XNU_KERNEL_PRIVATE */
extern struct vnodeop_desc vnop_setlabel_desc;
/*!
- @function VNOP_SETLABEL
- @abstract Associate a MACF label with a file.
- @param vp The vnode to label.
- @param label The desired label.
- @param ctx Context to authenticate for label change.
- @return 0 for success, else an error code.
+ * @function VNOP_SETLABEL
+ * @abstract Associate a MACF label with a file.
+ * @param vp The vnode to label.
+ * @param label The desired label.
+ * @param ctx Context to authenticate for label change.
+ * @return 0 for success, else an error code.
*/
#ifdef XNU_KERNEL_PRIVATE
errno_t VNOP_SETLABEL(vnode_t, struct label *, vfs_context_t);
#if NAMEDSTREAMS
-enum nsoperation { NS_OPEN, NS_CREATE, NS_DELETE };
+enum nsoperation { NS_OPEN, NS_CREATE, NS_DELETE };
+
+/* a_flags for vnop_getnamedstream_args: */
+#define NS_GETRAWENCRYPTED 0x00000001
struct vnop_getnamedstream_args {
struct vnodeop_desc *a_desc;
};
/*!
- @function VNOP_GETNAMEDSTREAM
- @abstract Get a named stream associated with a file.
- @discussion If this call sucecss, svpp should be returned with an iocount which the caller
- will drop. VFS provides a facility for simulating named streams when interacting with filesystems
- which do not support them.
- @param vp The vnode for which to get a named stream.
- @param svpp Destination for pointer to named stream's vnode.
- @param name The name of the named stream, e.g. "com.apple.ResourceFork".
- @param operation Operation to perform. In HFS and AFP, this parameter is only considered as follows:
- if the resource fork has not been opened and the operation is not NS_OPEN, fail with ENOATTR. Currently
- only passed as NS_OPEN by VFS.
- @param flags Currently unused.
- @param ctx Context to authenticate for getting named stream.
- @return 0 for success, else an error code.
+ * @function VNOP_GETNAMEDSTREAM
+ * @abstract Get a named stream associated with a file.
+ * @discussion If this call sucecss, svpp should be returned with an iocount which the caller
+ * will drop. VFS provides a facility for simulating named streams when interacting with filesystems
+ * which do not support them.
+ * @param vp The vnode for which to get a named stream.
+ * @param svpp Destination for pointer to named stream's vnode.
+ * @param name The name of the named stream, e.g. "com.apple.ResourceFork".
+ * @param operation Operation to perform. In HFS and AFP, this parameter is only considered as follows:
+ * if the resource fork has not been opened and the operation is not NS_OPEN, fail with ENOATTR. Currently
+ * only passed as NS_OPEN by VFS.
+ * @param flags Flags used to control getnamedstream behavior. Currently only used for raw-encrypted-requests.
+ * @param ctx Context to authenticate for getting named stream.
+ * @return 0 for success, else an error code.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_GETNAMEDSTREAM(vnode_t, vnode_t *, const char *, enum nsoperation, int flags, vfs_context_t);
};
/*!
- @function VNOP_MAKENAMEDSTREAM
- @abstract Create a named stream associated with a file.
- @discussion If this call succeeds, svpp should be returned with an iocount which the caller will drop.
- VFS provides a facility for simulating named streams when interacting with filesystems
- which do not support them.
- @param vp The vnode for which to get a named stream.
- @param svpp Destination for pointer to named stream's vnode.
- @param name The name of the named stream, e.g. "com.apple.ResourceFork".
- @param flags Currently unused.
- @param ctx Context to authenticate creating named stream.
- @return 0 for success, else an error code.
+ * @function VNOP_MAKENAMEDSTREAM
+ * @abstract Create a named stream associated with a file.
+ * @discussion If this call succeeds, svpp should be returned with an iocount which the caller will drop.
+ * VFS provides a facility for simulating named streams when interacting with filesystems
+ * which do not support them.
+ * @param vp The vnode for which to get a named stream.
+ * @param svpp Destination for pointer to named stream's vnode.
+ * @param name The name of the named stream, e.g. "com.apple.ResourceFork".
+ * @param flags Currently unused.
+ * @param ctx Context to authenticate creating named stream.
+ * @return 0 for success, else an error code.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_MAKENAMEDSTREAM(vnode_t, vnode_t *, const char *, int flags, vfs_context_t);
};
/*!
- @function VNOP_REMOVENAMEDSTREAM
- @abstract Delete a named stream associated with a file.
- @discussion VFS provides a facility for simulating named streams when interacting with filesystems
- which do not support them.
- @param vp The vnode to which the named stream belongs.
- @param svp The named stream's vnode.
- @param name The name of the named stream, e.g. "com.apple.ResourceFork".
- @param flags Currently unused.
- @param ctx Context to authenticate deleting named stream.
- @return 0 for success, else an error code.
+ * @function VNOP_REMOVENAMEDSTREAM
+ * @abstract Delete a named stream associated with a file.
+ * @discussion VFS provides a facility for simulating named streams when interacting with filesystems
+ * which do not support them.
+ * @param vp The vnode to which the named stream belongs.
+ * @param svp The named stream's vnode.
+ * @param name The name of the named stream, e.g. "com.apple.ResourceFork".
+ * @param flags Currently unused.
+ * @param ctx Context to authenticate deleting named stream.
+ * @return 0 for success, else an error code.
*/
#ifdef XNU_KERNEL_PRIVATE
extern errno_t VNOP_REMOVENAMEDSTREAM(vnode_t, vnode_t, const char *, int flags, vfs_context_t);
projects / apple / xnu.git / blobdiff