X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/6d2010ae8f7a6078e10b361c6962983bab233e0f..3e170ce000f1506b7b5d2c5c7faec85ceabb573d:/bsd/sys/buf.h

diff --git a/bsd/sys/buf.h b/bsd/sys/buf.h
index f1d7f924b..3763a223a 100644
--- a/bsd/sys/buf.h
+++ b/bsd/sys/buf.h
@@ -1,5 +1,5 @@
 /*
- * 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@
  * 
@@ -89,8 +89,10 @@
 #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 */
+
 /*
  * make sure to check when adding flags that
  * that the new flags don't overlap the definitions
@@ -273,7 +275,7 @@ void	buf_seterror(buf_t, errno_t);
 /*!
  @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.
@@ -283,7 +285,7 @@ void	buf_setflags(buf_t, int32_t);
 /*!
  @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.
@@ -1000,7 +1002,7 @@ buf_t	buf_geteblk(int);
 /*!
  @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.
@@ -1018,34 +1020,202 @@ uint32_t	buf_redundancy_flags(buf_t);
 /*!
  @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.
  */
 void	buf_set_redundancy_flags(buf_t, uint32_t);
 
+/*!
+ @function buf_attr
+ @abstract Gets the attributes for this buf.
+ @param bp Buffer whose attributes to get.
+ @return bufattr_t.
+ */
+bufattr_t buf_attr(buf_t);
+
+/*!
+ @function buf_markstatic
+ @abstract Mark a buffer as being likely to contain static data.
+ @param bp Buffer to mark.
+ @return void.
+ */
+ void buf_markstatic(buf_t);
+
+/*!
+ @function buf_static
+ @abstract Check if a buffer contains static data.
+ @param bp Buffer to test.
+ @return Nonzero if buffer has static data, 0 otherwise.
+ */
+int	buf_static(buf_t);
+
 #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 buf_getcpaddr
- @abstract Set the address of cp_entry on a buffer.
- @param bp Buffer whose cp entry value has to be set
+ @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_setcpx(bufattr_t, struct cpx *cpx);
+
+/*!
+ @function bufattr_cpoff
+ @abstract Gets the file offset on the buffer.
+ @param bap Buffer Attribute whose file offset value is used
  @return void.
  */
-void buf_setcpaddr(buf_t, void *);
+uint64_t bufattr_cpoff(bufattr_t);
 
 /*!
- @function buf_getcpaddr
- @abstract Get the address of cp_entry on a buffer.
- @param bp Buffer whose error value to set.
- @return int.
+ @function bufattr_setcpoff
+ @abstract Set the file offset for a content protected I/O on 
+ a buffer attribute.
+ @param bap Buffer Attribute whose cp file offset has to be set
+ @return void.
  */
-void *buf_getcpaddr(buf_t);
-#endif /* KERNEL_PRIVATE */
+void bufattr_setcpoff(bufattr_t, uint64_t);
+
+/*!
+ @function bufattr_rawencrypted
+ @abstract Check if a buffer contains raw encrypted data.
+ @param bap Buffer attribute to test.
+ @return Nonzero if buffer has raw encrypted data, 0 otherwise.
+ */
+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.
+ @param bap Buffer attribute to test.
+ @return Nonzero if the buffer is throttled, 0 otherwise.
+ */
+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.
+ @param bap Buffer attribute to test.
+ @return Nonzero if the buffer is not cached, 0 otherwise.
+ */
+int bufattr_nocache(bufattr_t bap);
+
+/*!
+ @function bufattr_meta
+ @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.
+ @param bap Buffer attribute to test.
+ @return Nonzero if the buffer is marked to delay idle sleep on disk IO, 0 otherwise.
+ */
+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