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-rw-r--r--Documentation/filesystems/vfs.txt17
1 files changed, 12 insertions, 5 deletions
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
index 0d04920..efd23f4 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -363,7 +363,7 @@ 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);
+ void (*update_time)(struct inode *, struct timespec *, int);
};
Again, all methods are called without any locks being held, unless
@@ -472,9 +472,9 @@ 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.
-
+ update_time: called by the VFS to update a specific time or the i_version of
+ an inode. If this is not defined the VFS will update the inode itself
+ and call mark_inode_dirty_sync.
The Address Space Object
========================
@@ -760,7 +760,7 @@ struct file_operations
----------------------
This describes how the VFS can manipulate an open file. As of kernel
-2.6.22, the following members are defined:
+3.5, the following members are defined:
struct file_operations {
struct module *owner;
@@ -790,6 +790,8 @@ struct file_operations {
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);
+ int (*setlease)(struct file *, long arg, struct file_lock **);
+ long (*fallocate)(struct file *, int mode, loff_t offset, loff_t len);
};
Again, all methods are called without any locks being held, unless
@@ -858,6 +860,11 @@ otherwise noted.
splice_read: called by the VFS to splice data from file to a pipe. This
method is used by the splice(2) system call
+ setlease: called by the VFS to set or release a file lock lease.
+ setlease has the file_lock_lock held and must not sleep.
+
+ fallocate: called by the VFS to preallocate blocks or punch a hole.
+
Note that the file operations are implemented by the specific
filesystem in which the inode resides. When opening a device node
(character or block special) most filesystems will call special