Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=422b14c2e2f816f58ce8ce0ab0beeae02dfb7a75
Commit: 422b14c2e2f816f58ce8ce0ab0beeae02dfb7a75
Parent: d52988023a37720e9e4aeb66362be67fa21d8836
Author: Borislav Petkov <[EMAIL PROTECTED]>
AuthorDate: Sun Jul 15 23:41:43 2007 -0700
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Mon Jul 16 09:05:51 2007 -0700
update Documentation/filesystems/vfs.txt
Update Documentation/filesystems/vfs.txt
Signed-off-by: Borislav Petkov <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
Documentation/filesystems/vfs.txt | 29 ++++++++++++++++-------------
1 files changed, 16 insertions(+), 13 deletions(-)
diff --git a/Documentation/filesystems/vfs.txt
b/Documentation/filesystems/vfs.txt
index f023609..045f3e0 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -197,7 +197,7 @@ struct super_operations
-----------------------
This describes how the VFS can manipulate the superblock of your
-filesystem. As of kernel 2.6.13, the following members are defined:
+filesystem. As of kernel 2.6.22, the following members are defined:
struct super_operations {
struct inode *(*alloc_inode)(struct super_block *sb);
@@ -220,8 +220,6 @@ struct super_operations {
void (*clear_inode) (struct inode *);
void (*umount_begin) (struct super_block *);
- void (*sync_inodes) (struct super_block *sb,
- struct writeback_control *wbc);
int (*show_options)(struct seq_file *, struct vfsmount *);
ssize_t (*quota_read)(struct super_block *, int, char *, size_t,
loff_t);
@@ -304,9 +302,6 @@ or bottom half).
umount_begin: called when the VFS is unmounting a filesystem.
- sync_inodes: called when the VFS is writing out dirty data associated with
- a superblock.
-
show_options: called by the VFS to show mount options for /proc/<pid>/mounts.
quota_read: called by the VFS to read from filesystem quota file.
@@ -328,7 +323,7 @@ struct inode_operations
-----------------------
This describes how the VFS can manipulate an inode in your
-filesystem. As of kernel 2.6.13, the following members are defined:
+filesystem. As of kernel 2.6.22, the following members are defined:
struct inode_operations {
int (*create) (struct inode *,struct dentry *,int, struct nameidata *);
@@ -352,6 +347,7 @@ struct inode_operations {
ssize_t (*getxattr) (struct dentry *, const char *, void *, size_t);
ssize_t (*listxattr) (struct dentry *, char *, size_t);
int (*removexattr) (struct dentry *, const char *);
+ void (*truncate_range)(struct inode *, loff_t, loff_t);
};
Again, all methods are called without any locks being held, unless
@@ -448,6 +444,9 @@ otherwise noted.
removexattr: called by the VFS to remove an extended attribute from
a file. This method is called by removexattr(2) system call.
+ truncate_range: a method provided by the underlying filesystem to truncate a
+ range of blocks , i.e. punch a hole somewhere in a file.
+
The Address Space Object
========================
@@ -526,7 +525,7 @@ struct address_space_operations
-------------------------------
This describes how the VFS can manipulate mapping of a file to page cache in
-your filesystem. As of kernel 2.6.16, the following members are defined:
+your filesystem. As of kernel 2.6.22, the following members are defined:
struct address_space_operations {
int (*writepage)(struct page *page, struct writeback_control *wbc);
@@ -547,6 +546,7 @@ struct address_space_operations {
int);
/* migrate the contents of a page to the specified target */
int (*migratepage) (struct page *, struct page *);
+ int (*launder_page) (struct page *);
};
writepage: called by the VM to write a dirty page to backing store.
@@ -693,6 +693,10 @@ struct address_space_operations {
transfer any private data across and update any references
that it has to the page.
+ launder_page: Called before freeing a page - it writes back the dirty page.
To
+ prevent redirtying the page, it is kept locked during the whole
+ operation.
+
The File Object
===============
@@ -703,9 +707,10 @@ struct file_operations
----------------------
This describes how the VFS can manipulate an open file. As of kernel
-2.6.17, the following members are defined:
+2.6.22, the following members are defined:
struct file_operations {
+ struct module *owner;
loff_t (*llseek) (struct file *, loff_t, int);
ssize_t (*read) (struct file *, char __user *, size_t, loff_t *);
ssize_t (*write) (struct file *, const char __user *, size_t, loff_t *);
@@ -732,10 +737,8 @@ struct file_operations {
int (*check_flags)(int);
int (*dir_notify)(struct file *filp, unsigned long arg);
int (*flock) (struct file *, int, struct file_lock *);
- ssize_t (*splice_write)(struct pipe_inode_info *, struct file *,
size_t, unsigned
-int);
- ssize_t (*splice_read)(struct file *, struct pipe_inode_info *, size_t,
unsigned
-int);
+ ssize_t (*splice_write)(struct pipe_inode_info *, struct file *,
size_t, unsigned int);
+ ssize_t (*splice_read)(struct file *, struct pipe_inode_info *, size_t,
unsigned int);
};
Again, all methods are called without any locks being held, unless
-
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