/*
- * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2014 Apple Computer, Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
#define B_FUA 0x00000400 /* Write-through disk cache(if supported) */
#define B_PASSIVE 0x00000800 /* PASSIVE I/Os are ignored by THROTTLE I/O */
#define B_IOSTREAMING 0x00001000 /* sequential access pattern detected */
-#define B_THROTTLED_IO 0x00002000 /* low priority I/O */
+#define B_THROTTLED_IO 0x00002000 /* low priority I/O (deprecated) */
#define B_ENCRYPTED_IO 0x00004000 /* Encrypted I/O */
#define B_STATICCONTENT 0x00008000 /* Buffer is likely to remain unaltered */
/*!
@function buf_setflags
@abstract Set flags on a buffer.
- @discussion: buffer_flags |= flags
+ @discussion buffer_flags |= flags
@param bp Buffer whose flags to set.
@param flags Flags to add to buffer's mask. B_LOCKED/B_NOCACHE/B_ASYNC/B_READ/B_WRITE/B_PAGEIO/B_FUA
@return void.
/*!
@function buf_clearflags
@abstract Clear flags on a buffer.
- @discussion: buffer_flags &= ~flags
+ @discussion buffer_flags &= ~flags
@param bp Buffer whose flags to clear.
@param flags Flags to remove from buffer's mask. B_LOCKED/B_NOCACHE/B_ASYNC/B_READ/B_WRITE/B_PAGEIO/B_FUA
@return void.
/*!
@function buf_clear_redundancy_flags
@abstract Clear flags on a buffer.
- @discussion: buffer_redundancy_flags &= ~flags
+ @discussion buffer_redundancy_flags &= ~flags
@param bp Buffer whose flags to clear.
@param flags Flags to remove from buffer's mask
@return void.
/*!
@function buf_setredundancyflags
@abstract Set redundancy flags on a buffer.
- @discussion: buffer_redundancy_flags |= flags
+ @discussion buffer_redundancy_flags |= flags
@param bp Buffer whose flags to set.
@param flags Flags to add to buffer's redundancy flags
@return void.
#ifdef KERNEL_PRIVATE
void buf_setfilter(buf_t, void (*)(buf_t, void *), void *, void (**)(buf_t, void *), void **);
+/* bufattr allocation/duplication/deallocation functions */
bufattr_t bufattr_alloc(void);
-
+bufattr_t bufattr_dup (bufattr_t bap);
void bufattr_free(bufattr_t bap);
/*!
- @function bufattr_cpaddr
- @abstract Get the address of cp_entry on a buffer.
- @param bap Buffer Attribute whose cp_entry to get.
- @return int.
+ @function bufattr_cpx
+ @abstract Returns a pointer to a cpx_t structure.
+ @param bap Buffer Attribute whose cpx_t structure you wish to get.
+ @return Returns a cpx_t structure, or NULL if not valid
+ */
+struct cpx *bufattr_cpx(bufattr_t);
+
+/*!
+ @function bufattr_setcpx
+ @abstract Set the cp_ctx on a buffer attribute.
+ @param bap Buffer Attribute that you wish to change
+ @return void
*/
-void *bufattr_cpaddr(bufattr_t);
+void bufattr_setcpx(bufattr_t, struct cpx *cpx);
/*!
@function bufattr_cpoff
*/
uint64_t bufattr_cpoff(bufattr_t);
-
-/*!
- @function bufattr_setcpaddr
- @abstract Set the address of cp_entry on a buffer attribute.
- @param bap Buffer Attribute whose cp entry value has to be set
- @return void.
- */
-void bufattr_setcpaddr(bufattr_t, void *);
-
/*!
@function bufattr_setcpoff
@abstract Set the file offset for a content protected I/O on
*/
int bufattr_rawencrypted(bufattr_t bap);
+/*!
+ @function bufattr_markgreedymode
+ @abstract Mark a buffer to use the greedy mode for writing.
+ @param bap Buffer attributes to mark.
+ @discussion Greedy Mode: request improved write performance from the underlying device at the expense of storage efficiency
+ @return void.
+ */
+ void bufattr_markgreedymode(bufattr_t bap);
+
+/*!
+ @function bufattr_greedymode
+ @abstract Check if a buffer is written using the Greedy Mode
+ @param bap Buffer attributes to test.
+ @discussion Greedy Mode: request improved write performance from the underlying device at the expense of storage efficiency
+ @return Nonzero if buffer uses greedy mode, 0 otherwise.
+ */
+int bufattr_greedymode(bufattr_t bap);
+
+/*!
+ @function bufattr_markisochronous
+ @abstract Mark a buffer to use the isochronous throughput mode for writing.
+ @param bap Buffer attributes to mark.
+ @discussion isochronous mode: request improved write performance from the underlying device at the expense of storage efficiency
+ @return void.
+ */
+ void bufattr_markisochronous(bufattr_t bap);
+
+ /*!
+ @function bufattr_isochronous
+ @abstract Check if a buffer is written using the isochronous
+ @param bap Buffer attributes to test.
+ @discussion isochronous mode: request improved write performance from the underlying device at the expense of storage efficiency
+ @return Nonzero if buffer uses isochronous mode, 0 otherwise.
+ */
+int bufattr_isochronous(bufattr_t bap);
+
+
/*!
@function bufattr_throttled
@abstract Check if a buffer is throttled.
*/
int bufattr_throttled(bufattr_t bap);
+/*!
+ @function bufattr_passive
+ @abstract Check if a buffer is marked passive.
+ @param bap Buffer attribute to test.
+ @return Nonzero if the buffer is marked passive, 0 otherwise.
+ */
+int bufattr_passive(bufattr_t bap);
+
/*!
@function bufattr_nocache
@abstract Check if a buffer has nocache attribute.
/*!
@function bufattr_meta
- @abstract Check if a buffer has meta attribute.
+ @abstract Check if a buffer has the bufattr meta attribute.
@param bap Buffer attribute to test.
@return Nonzero if the buffer has meta attribute, 0 otherwise.
*/
int bufattr_meta(bufattr_t bap);
+/*!
+ @function bufattr_markmeta
+ @abstract Set the bufattr meta attribute.
+ @param bap Buffer attribute to manipulate.
+ @return void
+ */
+void bufattr_markmeta(bufattr_t bap);
+
+
/*!
@function bufattr_delayidlesleep
@abstract Check if a buffer is marked to delay idle sleep on disk IO.
*/
int bufattr_delayidlesleep(bufattr_t bap);
+/*!
+ @function buf_kernel_addrperm_addr
+ @abstract Obfuscate the buf pointers.
+ @param addr Buf_t pointer.
+ @return Obfuscated pointer if addr is non zero, 0 otherwise.
+ */
+vm_offset_t buf_kernel_addrperm_addr(void * addr);
+
+/*!
+ @function bufattr_markquickcomplete
+ @abstract Mark a buffer to hint quick completion to the driver.
+ @discussion This flag hints the storage driver that some thread is waiting for this I/O to complete.
+ It should therefore attempt to complete it as soon as possible at the cost of device efficiency.
+ @param bap Buffer attributes to mark.
+ @return void.
+ */
+void bufattr_markquickcomplete(bufattr_t bap);
+
+/*!
+ @function bufattr_quickcomplete
+ @abstract Check if a buffer is marked for quick completion
+ @discussion This flag hints the storage driver that some thread is waiting for this I/O to complete.
+ It should therefore attempt to complete it as soon as possible at the cost of device efficiency.
+ @param bap Buffer attribute to test.
+ @return Nonzero if the buffer is marked for quick completion, 0 otherwise.
+ */
+int bufattr_quickcomplete(bufattr_t bap);
+
#endif /* KERNEL_PRIVATE */
__END_DECLS
projects / apple / xnu.git / blobdiff