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| author |   Amir Goldstein <amir73il@gmail.com> | 2018-08-27 15:56:02 +0300 |
|---|---|---|
| committer |   Miklos Szeredi <mszeredi@redhat.com> | 2018-08-30 17:08:35 +0200 |
| commit | 45cd0faae3715e305bc46e23b34c5ed4d185ceb8 (patch) | |
| tree | be01e26c488ebd3cb7943136a0805563e311d117 /Documentation/filesystems | |
| parent | Documentation/filesystems: update documentation of file_operations (diff) | |
| download | linux-dev-45cd0faae3715e305bc46e23b34c5ed4d185ceb8.tar.xz linux-dev-45cd0faae3715e305bc46e23b34c5ed4d185ceb8.zip | |
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/filesystems')
| -rw-r--r-- | Documentation/filesystems/vfs.txt | 3 |
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 |