Documentation/filesystems: fix documentation for ->getattr()

Following the recent merge of statx, correct the documented prototype
for the ->getattr() inode operation, and add an entry to the porting
file.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

3 files changed, 8 insertions, 4 deletions

diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index fdcfdd79682a..fe25787ff6d4 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -58,8 +58,7 @@ prototypes:
         int (*permission) (struct inode *, int, unsigned int);
         int (*get_acl)(struct inode *, int);
         int (*setattr) (struct dentry *, struct iattr *);
-        int (*getattr) (const struct path *, struct dentry *, struct kstat *,
-                        u32, unsigned int);
+        int (*getattr) (const struct path *, struct kstat *, u32, unsigned int);
         ssize_t (*listxattr) (struct dentry *, char *, size_t);
         int (*fiemap)(struct inode *, struct fiemap_extent_info *, u64 start, u64 len);
         void (*update_time)(struct inode *, struct timespec *, int);
diff --git a/Documentation/filesystems/porting b/Documentation/filesystems/porting
index 95280079c0b3..5fb17f49f7a2 100644
--- a/Documentation/filesystems/porting
+++ b/Documentation/filesystems/porting
@@ -600,3 +600,9 @@ in your dentry operations instead.
 [recommended]
         ->readlink is optional for symlinks.  Don't set, unless filesystem needs
         to fake something for readlink(2).
+--
+[mandatory]
+        ->getattr() is now passed a struct path rather than a vfsmount and
+        dentry separately, and it now has request_mask and query_flags arguments
+        to specify the fields and sync type requested by statx.  Filesystems not
+        supporting any statx-specific features may ignore the new arguments.
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
index 569211703721..94dd27ef4a76 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -382,8 +382,7 @@ struct inode_operations {
         int (*permission) (struct inode *, int);
         int (*get_acl)(struct inode *, int);
         int (*setattr) (struct dentry *, struct iattr *);
-        int (*getattr) (const struct path *, struct dentry *, struct kstat *,
-                        u32, unsigned int);
+        int (*getattr) (const struct path *, struct kstat *, u32, unsigned int);
         ssize_t (*listxattr) (struct dentry *, char *, size_t);
         void (*update_time)(struct inode *, struct timespec *, int);
         int (*atomic_open)(struct inode *, struct dentry *, struct file *,