6.6-stable review patch. If anyone has any objections, please let me know.
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From: Amir Goldstein amir73il@gmail.com
commit 07aeefae7ff44d80524375253980b1bdee2396b0 upstream.
We want to be able to encode an fid from an inode with no alias.
Signed-off-by: Amir Goldstein amir73il@gmail.com Link: https://lore.kernel.org/r/20250105162404.357058-2-amir73il@gmail.com Signed-off-by: Christian Brauner brauner@kernel.org Stable-dep-of: c45beebfde34 ("ovl: support encoding fid from inode with no alias") Signed-off-by: Sasha Levin sashal@kernel.org [re-applied over v6.6.71 with conflict resolved] Signed-off-by: Amir Goldstein amir73il@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/overlayfs/copy_up.c | 11 ++++++----- fs/overlayfs/export.c | 5 +++-- fs/overlayfs/namei.c | 4 ++-- fs/overlayfs/overlayfs.h | 2 +- 4 files changed, 12 insertions(+), 10 deletions(-)
--- a/fs/overlayfs/copy_up.c +++ b/fs/overlayfs/copy_up.c @@ -371,13 +371,13 @@ int ovl_set_attr(struct ovl_fs *ofs, str return err; }
-struct ovl_fh *ovl_encode_real_fh(struct ovl_fs *ofs, struct dentry *real, +struct ovl_fh *ovl_encode_real_fh(struct ovl_fs *ofs, struct inode *realinode, bool is_upper) { struct ovl_fh *fh; int fh_type, dwords; int buflen = MAX_HANDLE_SZ; - uuid_t *uuid = &real->d_sb->s_uuid; + uuid_t *uuid = &realinode->i_sb->s_uuid; int err;
/* Make sure the real fid stays 32bit aligned */ @@ -394,7 +394,8 @@ struct ovl_fh *ovl_encode_real_fh(struct * the price or reconnecting the dentry. */ dwords = buflen >> 2; - fh_type = exportfs_encode_fh(real, (void *)fh->fb.fid, &dwords, 0); + fh_type = exportfs_encode_inode_fh(realinode, (void *)fh->fb.fid, + &dwords, NULL, 0); buflen = (dwords << 2);
err = -EIO; @@ -438,7 +439,7 @@ int ovl_set_origin(struct ovl_fs *ofs, s * up and a pure upper inode. */ if (ovl_can_decode_fh(lower->d_sb)) { - fh = ovl_encode_real_fh(ofs, lower, false); + fh = ovl_encode_real_fh(ofs, d_inode(lower), false); if (IS_ERR(fh)) return PTR_ERR(fh); } @@ -461,7 +462,7 @@ static int ovl_set_upper_fh(struct ovl_f const struct ovl_fh *fh; int err;
- fh = ovl_encode_real_fh(ofs, upper, true); + fh = ovl_encode_real_fh(ofs, d_inode(upper), true); if (IS_ERR(fh)) return PTR_ERR(fh);
--- a/fs/overlayfs/export.c +++ b/fs/overlayfs/export.c @@ -228,6 +228,7 @@ static int ovl_check_encode_origin(struc static int ovl_dentry_to_fid(struct ovl_fs *ofs, struct dentry *dentry, u32 *fid, int buflen) { + struct inode *inode = d_inode(dentry); struct ovl_fh *fh = NULL; int err, enc_lower; int len; @@ -241,8 +242,8 @@ static int ovl_dentry_to_fid(struct ovl_ goto fail;
/* Encode an upper or lower file handle */ - fh = ovl_encode_real_fh(ofs, enc_lower ? ovl_dentry_lower(dentry) : - ovl_dentry_upper(dentry), !enc_lower); + fh = ovl_encode_real_fh(ofs, enc_lower ? ovl_inode_lower(inode) : + ovl_inode_upper(inode), !enc_lower); if (IS_ERR(fh)) return PTR_ERR(fh);
--- a/fs/overlayfs/namei.c +++ b/fs/overlayfs/namei.c @@ -523,7 +523,7 @@ int ovl_verify_set_fh(struct ovl_fs *ofs struct ovl_fh *fh; int err;
- fh = ovl_encode_real_fh(ofs, real, is_upper); + fh = ovl_encode_real_fh(ofs, d_inode(real), is_upper); err = PTR_ERR(fh); if (IS_ERR(fh)) { fh = NULL; @@ -720,7 +720,7 @@ int ovl_get_index_name(struct ovl_fs *of struct ovl_fh *fh; int err;
- fh = ovl_encode_real_fh(ofs, origin, false); + fh = ovl_encode_real_fh(ofs, d_inode(origin), false); if (IS_ERR(fh)) return PTR_ERR(fh);
--- a/fs/overlayfs/overlayfs.h +++ b/fs/overlayfs/overlayfs.h @@ -821,7 +821,7 @@ int ovl_copy_up_with_data(struct dentry int ovl_maybe_copy_up(struct dentry *dentry, int flags); int ovl_copy_xattr(struct super_block *sb, const struct path *path, struct dentry *new); int ovl_set_attr(struct ovl_fs *ofs, struct dentry *upper, struct kstat *stat); -struct ovl_fh *ovl_encode_real_fh(struct ovl_fs *ofs, struct dentry *real, +struct ovl_fh *ovl_encode_real_fh(struct ovl_fs *ofs, struct inode *realinode, bool is_upper); int ovl_set_origin(struct ovl_fs *ofs, struct dentry *lower, struct dentry *upper);