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authorAmir Goldstein <amir73il@gmail.com>2023-10-23 21:07:59 +0300
committerChristian Brauner <brauner@kernel.org>2023-10-28 16:15:15 +0200
commite21fc2038c1b978b89bbc3d45a4c5c6ef598e178 (patch)
treec649b5c855ca7fcc5b440fe57c3f64c56ec768aa /fs
parent66c62769bcf6aa142e2309278980a2e52f4b08db (diff)
exportfs: make ->encode_fh() a mandatory method for NFS export
Rename the default helper for encoding FILEID_INO32_GEN* file handles to generic_encode_ino32_fh() and convert the filesystems that used the default implementation to use the generic helper explicitly. After this change, exportfs_encode_inode_fh() no longer has a default implementation to encode FILEID_INO32_GEN* file handles. This is a step towards allowing filesystems to encode non-decodeable file handles for fanotify without having to implement any export_operations. Reviewed-by: Jan Kara <jack@suse.cz> Reviewed-by: Jeff Layton <jlayton@kernel.org> Acked-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Amir Goldstein <amir73il@gmail.com> Link: https://lore.kernel.org/r/20231023180801.2953446-3-amir73il@gmail.com Acked-by: Dave Kleikamp <dave.kleikamp@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/affs/namei.c1
-rw-r--r--fs/befs/linuxvfs.c1
-rw-r--r--fs/efs/super.c1
-rw-r--r--fs/erofs/super.c1
-rw-r--r--fs/exportfs/expfs.c16
-rw-r--r--fs/ext2/super.c1
-rw-r--r--fs/ext4/super.c1
-rw-r--r--fs/f2fs/super.c1
-rw-r--r--fs/fat/nfs.c1
-rw-r--r--fs/jffs2/super.c1
-rw-r--r--fs/jfs/super.c1
-rw-r--r--fs/ntfs/namei.c1
-rw-r--r--fs/ntfs3/super.c1
-rw-r--r--fs/smb/client/export.c11
-rw-r--r--fs/squashfs/export.c1
-rw-r--r--fs/ufs/super.c1
16 files changed, 28 insertions, 13 deletions
diff --git a/fs/affs/namei.c b/fs/affs/namei.c
index 2fe4a5832fcf..d6b9758ee23d 100644
--- a/fs/affs/namei.c
+++ b/fs/affs/namei.c
@@ -568,6 +568,7 @@ static struct dentry *affs_fh_to_parent(struct super_block *sb, struct fid *fid,
}
const struct export_operations affs_export_ops = {
+ .encode_fh = generic_encode_ino32_fh,
.fh_to_dentry = affs_fh_to_dentry,
.fh_to_parent = affs_fh_to_parent,
.get_parent = affs_get_parent,
diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c
index 9a16a51fbb88..410dcaffd5ab 100644
--- a/fs/befs/linuxvfs.c
+++ b/fs/befs/linuxvfs.c
@@ -96,6 +96,7 @@ static const struct address_space_operations befs_symlink_aops = {
};
static const struct export_operations befs_export_operations = {
+ .encode_fh = generic_encode_ino32_fh,
.fh_to_dentry = befs_fh_to_dentry,
.fh_to_parent = befs_fh_to_parent,
.get_parent = befs_get_parent,
diff --git a/fs/efs/super.c b/fs/efs/super.c
index b287f47c165b..f17fdac76b2e 100644
--- a/fs/efs/super.c
+++ b/fs/efs/super.c
@@ -123,6 +123,7 @@ static const struct super_operations efs_superblock_operations = {
};
static const struct export_operations efs_export_ops = {
+ .encode_fh = generic_encode_ino32_fh,
.fh_to_dentry = efs_fh_to_dentry,
.fh_to_parent = efs_fh_to_parent,
.get_parent = efs_get_parent,
diff --git a/fs/erofs/super.c b/fs/erofs/super.c
index 3700af9ee173..edbe07a24156 100644
--- a/fs/erofs/super.c
+++ b/fs/erofs/super.c
@@ -626,6 +626,7 @@ static struct dentry *erofs_get_parent(struct dentry *child)
}
static const struct export_operations erofs_export_ops = {
+ .encode_fh = generic_encode_ino32_fh,
.fh_to_dentry = erofs_fh_to_dentry,
.fh_to_parent = erofs_fh_to_parent,
.get_parent = erofs_get_parent,
diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c
index 9ee205df8fa7..8f883c4758f5 100644
--- a/fs/exportfs/expfs.c
+++ b/fs/exportfs/expfs.c
@@ -343,20 +343,21 @@ out:
}
/**
- * export_encode_fh - default export_operations->encode_fh function
+ * generic_encode_ino32_fh - generic export_operations->encode_fh function
* @inode: the object to encode
- * @fid: where to store the file handle fragment
- * @max_len: maximum length to store there
+ * @fh: where to store the file handle fragment
+ * @max_len: maximum length to store there (in 4 byte units)
* @parent: parent directory inode, if wanted
*
- * This default encode_fh function assumes that the 32 inode number
+ * This generic encode_fh function assumes that the 32 inode number
* is suitable for locating an inode, and that the generation number
* can be used to check that it is still valid. It places them in the
* filehandle fragment where export_decode_fh expects to find them.
*/
-static int export_encode_fh(struct inode *inode, struct fid *fid,
- int *max_len, struct inode *parent)
+int generic_encode_ino32_fh(struct inode *inode, __u32 *fh, int *max_len,
+ struct inode *parent)
{
+ struct fid *fid = (void *)fh;
int len = *max_len;
int type = FILEID_INO32_GEN;
@@ -380,6 +381,7 @@ static int export_encode_fh(struct inode *inode, struct fid *fid,
*max_len = len;
return type;
}
+EXPORT_SYMBOL_GPL(generic_encode_ino32_fh);
/**
* exportfs_encode_inode_fh - encode a file handle from inode
@@ -402,7 +404,7 @@ int exportfs_encode_inode_fh(struct inode *inode, struct fid *fid,
if (nop && nop->encode_fh)
return nop->encode_fh(inode, fid->raw, max_len, parent);
- return export_encode_fh(inode, fid, max_len, parent);
+ return -EOPNOTSUPP;
}
EXPORT_SYMBOL_GPL(exportfs_encode_inode_fh);
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index aaf3e3e88cb2..b9f158a34997 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -397,6 +397,7 @@ static struct dentry *ext2_fh_to_parent(struct super_block *sb, struct fid *fid,
}
static const struct export_operations ext2_export_ops = {
+ .encode_fh = generic_encode_ino32_fh,
.fh_to_dentry = ext2_fh_to_dentry,
.fh_to_parent = ext2_fh_to_parent,
.get_parent = ext2_get_parent,
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index dbebd8b3127e..c44db1915437 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1646,6 +1646,7 @@ static const struct super_operations ext4_sops = {
};
static const struct export_operations ext4_export_ops = {
+ .encode_fh = generic_encode_ino32_fh,
.fh_to_dentry = ext4_fh_to_dentry,
.fh_to_parent = ext4_fh_to_parent,
.get_parent = ext4_get_parent,
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index a8c8232852bb..60cfa11f65bf 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -3282,6 +3282,7 @@ static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
}
static const struct export_operations f2fs_export_ops = {
+ .encode_fh = generic_encode_ino32_fh,
.fh_to_dentry = f2fs_fh_to_dentry,
.fh_to_parent = f2fs_fh_to_parent,
.get_parent = f2fs_get_parent,
diff --git a/fs/fat/nfs.c b/fs/fat/nfs.c
index 3626eb585a98..c52e63e10d35 100644
--- a/fs/fat/nfs.c
+++ b/fs/fat/nfs.c
@@ -279,6 +279,7 @@ static struct dentry *fat_get_parent(struct dentry *child_dir)
}
const struct export_operations fat_export_ops = {
+ .encode_fh = generic_encode_ino32_fh,
.fh_to_dentry = fat_fh_to_dentry,
.fh_to_parent = fat_fh_to_parent,
.get_parent = fat_get_parent,
diff --git a/fs/jffs2/super.c b/fs/jffs2/super.c
index 7ea37f49f1e1..f99591a634b4 100644
--- a/fs/jffs2/super.c
+++ b/fs/jffs2/super.c
@@ -150,6 +150,7 @@ static struct dentry *jffs2_get_parent(struct dentry *child)
}
static const struct export_operations jffs2_export_ops = {
+ .encode_fh = generic_encode_ino32_fh,
.get_parent = jffs2_get_parent,
.fh_to_dentry = jffs2_fh_to_dentry,
.fh_to_parent = jffs2_fh_to_parent,
diff --git a/fs/jfs/super.c b/fs/jfs/super.c
index 2e2f7f6d36a0..2cc2632f3c47 100644
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -896,6 +896,7 @@ static const struct super_operations jfs_super_operations = {
};
static const struct export_operations jfs_export_operations = {
+ .encode_fh = generic_encode_ino32_fh,
.fh_to_dentry = jfs_fh_to_dentry,
.fh_to_parent = jfs_fh_to_parent,
.get_parent = jfs_get_parent,
diff --git a/fs/ntfs/namei.c b/fs/ntfs/namei.c
index ab44f2db533b..d7498ddc4a72 100644
--- a/fs/ntfs/namei.c
+++ b/fs/ntfs/namei.c
@@ -384,6 +384,7 @@ static struct dentry *ntfs_fh_to_parent(struct super_block *sb, struct fid *fid,
* and due to using iget() whereas NTFS needs ntfs_iget().
*/
const struct export_operations ntfs_export_ops = {
+ .encode_fh = generic_encode_ino32_fh,
.get_parent = ntfs_get_parent, /* Find the parent of a given
directory. */
.fh_to_dentry = ntfs_fh_to_dentry,
diff --git a/fs/ntfs3/super.c b/fs/ntfs3/super.c
index f763e3256ccc..9153dffde950 100644
--- a/fs/ntfs3/super.c
+++ b/fs/ntfs3/super.c
@@ -811,6 +811,7 @@ static int ntfs_nfs_commit_metadata(struct inode *inode)
}
static const struct export_operations ntfs_export_ops = {
+ .encode_fh = generic_encode_ino32_fh,
.fh_to_dentry = ntfs_fh_to_dentry,
.fh_to_parent = ntfs_fh_to_parent,
.get_parent = ntfs3_get_parent,
diff --git a/fs/smb/client/export.c b/fs/smb/client/export.c
index 37c28415df1e..d606e8cbcb7d 100644
--- a/fs/smb/client/export.c
+++ b/fs/smb/client/export.c
@@ -41,13 +41,12 @@ static struct dentry *cifs_get_parent(struct dentry *dentry)
}
const struct export_operations cifs_export_ops = {
+ .encode_fh = generic_encode_ino32_fh,
.get_parent = cifs_get_parent,
-/* Following five export operations are unneeded so far and can default:
- .get_dentry =
- .get_name =
- .find_exported_dentry =
- .decode_fh =
- .encode_fs = */
+/*
+ * Following export operations are mandatory for NFS export support:
+ * .fh_to_dentry =
+ */
};
#endif /* CONFIG_CIFS_NFSD_EXPORT */
diff --git a/fs/squashfs/export.c b/fs/squashfs/export.c
index 723763746238..62972f0ff868 100644
--- a/fs/squashfs/export.c
+++ b/fs/squashfs/export.c
@@ -173,6 +173,7 @@ __le64 *squashfs_read_inode_lookup_table(struct super_block *sb,
const struct export_operations squashfs_export_ops = {
+ .encode_fh = generic_encode_ino32_fh,
.fh_to_dentry = squashfs_fh_to_dentry,
.fh_to_parent = squashfs_fh_to_parent,
.get_parent = squashfs_get_parent
diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index 23377c1baed9..a480810cd4e3 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -137,6 +137,7 @@ static struct dentry *ufs_get_parent(struct dentry *child)
}
static const struct export_operations ufs_export_ops = {
+ .encode_fh = generic_encode_ino32_fh,
.fh_to_dentry = ufs_fh_to_dentry,
.fh_to_parent = ufs_fh_to_parent,
.get_parent = ufs_get_parent,