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ovl: Add S_CASEFOLD as part of the inode flag to be copied

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To keep ovl's inodes consistent with their real inodes, create a new
mask for inode file attributes that needs to be copied.  Add the
S_CASEFOLD flag as part of the flags that need to be copied along with
the other file attributes.

Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: André Almeida <andrealmeid@igalia.com>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
This commit is contained in:
André Almeida
2025-08-14 14:22:18 -03:00
committed by Amir Goldstein
parent 8a78f18975
commit f9377faaea
4 changed files with 8 additions and 4 deletions
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2
fs/overlayfs/copy_up.c
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@@ -670,7 +670,7 @@ static int ovl_copy_up_metadata(struct ovl_copy_up_ctx *c, struct dentry *temp)
if (err)
return err;
if (inode->i_flags & OVL_COPY_I_FLAGS_MASK &&
if (inode->i_flags & OVL_FATTR_I_FLAGS_MASK &&
(S_ISREG(c->stat.mode) || S_ISDIR(c->stat.mode))) {
/*
* Copy the fileattr inode flags that are the source of already

1
fs/overlayfs/inode.c
View File

@@ -1277,6 +1277,7 @@ struct inode *ovl_get_inode(struct super_block *sb,
}
ovl_fill_inode(inode, realinode->i_mode, realinode->i_rdev);
ovl_inode_init(inode, oip, ino, fsid);
WARN_ON_ONCE(!!IS_CASEFOLDED(inode) != ofs->casefold);
if (upperdentry && ovl_is_impuredir(sb, upperdentry))
ovl_set_flag(OVL_IMPURE, inode);

8
fs/overlayfs/overlayfs.h
View File

@@ -821,10 +821,12 @@ struct inode *ovl_get_inode(struct super_block *sb,
struct ovl_inode_params *oip);
void ovl_copyattr(struct inode *to);
/* vfs fileattr flags read from overlay.protattr xattr to ovl inode */
#define OVL_PROT_I_FLAGS_MASK (S_APPEND | S_IMMUTABLE)
/* vfs fileattr flags copied from real to ovl inode */
#define OVL_FATTR_I_FLAGS_MASK (OVL_PROT_I_FLAGS_MASK | S_SYNC | S_NOATIME)
/* vfs inode flags copied from real to ovl inode */
#define OVL_COPY_I_FLAGS_MASK (S_SYNC | S_NOATIME | S_APPEND | S_IMMUTABLE)
/* vfs inode flags read from overlay.protattr xattr to ovl inode */
#define OVL_PROT_I_FLAGS_MASK (S_APPEND | S_IMMUTABLE)
#define OVL_COPY_I_FLAGS_MASK (OVL_FATTR_I_FLAGS_MASK | S_CASEFOLD)
/*
* fileattr flags copied from lower to upper inode on copy up.

1
fs/overlayfs/super.c
View File

@@ -1348,6 +1348,7 @@ static struct dentry *ovl_get_root(struct super_block *sb,
ovl_dentry_set_flag(OVL_E_CONNECTED, root);
ovl_set_upperdata(d_inode(root));
ovl_inode_init(d_inode(root), &oip, ino, fsid);
WARN_ON(!!IS_CASEFOLDED(d_inode(root)) != ofs->casefold);
ovl_dentry_init_flags(root, upperdentry, oe, DCACHE_OP_WEAK_REVALIDATE);
/* root keeps a reference of upperdentry */
dget(upperdentry);