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authorAmir Goldstein <amir73il@gmail.com>2018-08-27 15:56:02 +0300
committerMiklos Szeredi <mszeredi@redhat.com>2018-08-30 17:08:35 +0200
commit45cd0faae3715e305bc46e23b34c5ed4d185ceb8 (patch)
treebe01e26c488ebd3cb7943136a0805563e311d117 /Documentation
parent17ef445f9befdc5c9adac270b18240ad24ee50ec (diff)
vfs: add the fadvise() file operation
This is going to be used by overlayfs and possibly useful for other filesystems. Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/filesystems/vfs.txt3
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
index ec2142c8dbd3..a6c6a8af48a2 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -885,6 +885,7 @@ struct file_operations {
ssize_t (*copy_file_range)(struct file *, loff_t, struct file *, loff_t, size_t, unsigned int);
int (*clone_file_range)(struct file *, loff_t, struct file *, loff_t, u64);
int (*dedupe_file_range)(struct file *, loff_t, struct file *, loff_t, u64);
+ int (*fadvise)(struct file *, loff_t, loff_t, int);
};
Again, all methods are called without any locks being held, unless
@@ -965,6 +966,8 @@ otherwise noted.
dedupe_file_range: called by the ioctl(2) system call for FIDEDUPERANGE
command.
+ fadvise: possibly called by the fadvise64() system call.
+
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