summaryrefslogtreecommitdiffstats
path: root/fs/overlayfs
diff options
context:
space:
mode:
Diffstat (limited to 'fs/overlayfs')
-rw-r--r--fs/overlayfs/copy_up.c16
-rw-r--r--fs/overlayfs/dir.c4
-rw-r--r--fs/overlayfs/export.c49
-rw-r--r--fs/overlayfs/namei.c4
-rw-r--r--fs/overlayfs/overlayfs.h2
-rw-r--r--fs/overlayfs/util.c4
6 files changed, 42 insertions, 37 deletions
diff --git a/fs/overlayfs/copy_up.c b/fs/overlayfs/copy_up.c
index 3601ddfeddc2..0c28e5fa3407 100644
--- a/fs/overlayfs/copy_up.c
+++ b/fs/overlayfs/copy_up.c
@@ -415,13 +415,13 @@ int ovl_set_attr(struct ovl_fs *ofs, struct dentry *upperdentry,
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 */
@@ -438,13 +438,13 @@ struct ovl_fh *ovl_encode_real_fh(struct ovl_fs *ofs, struct dentry *real,
* 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;
- if (WARN_ON(fh_type < 0) ||
- WARN_ON(buflen > MAX_HANDLE_SZ) ||
- WARN_ON(fh_type == FILEID_INVALID))
+ if (fh_type < 0 || fh_type == FILEID_INVALID ||
+ WARN_ON(buflen > MAX_HANDLE_SZ))
goto out_err;
fh->fb.version = OVL_FH_VERSION;
@@ -480,7 +480,7 @@ struct ovl_fh *ovl_get_origin_fh(struct ovl_fs *ofs, struct dentry *origin)
if (!ovl_can_decode_fh(origin->d_sb))
return NULL;
- return ovl_encode_real_fh(ofs, origin, false);
+ return ovl_encode_real_fh(ofs, d_inode(origin), false);
}
int ovl_set_origin_fh(struct ovl_fs *ofs, const struct ovl_fh *fh,
@@ -505,7 +505,7 @@ static int ovl_set_upper_fh(struct ovl_fs *ofs, struct dentry *upper,
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);
diff --git a/fs/overlayfs/dir.c b/fs/overlayfs/dir.c
index 08e683917d12..c9993ff66fc2 100644
--- a/fs/overlayfs/dir.c
+++ b/fs/overlayfs/dir.c
@@ -575,12 +575,12 @@ static const struct cred *ovl_setup_cred_for_create(struct dentry *dentry,
}
/*
- * Caller is going to match this with revert_creds_light() and drop
+ * Caller is going to match this with revert_creds() and drop
* referenec on the returned creds.
* We must be called with creator creds already, otherwise we risk
* leaking creds.
*/
- old_cred = override_creds_light(override_cred);
+ old_cred = override_creds(override_cred);
WARN_ON_ONCE(old_cred != ovl_creds(dentry->d_sb));
return override_cred;
diff --git a/fs/overlayfs/export.c b/fs/overlayfs/export.c
index 5868cb222955..444aeeccb6da 100644
--- a/fs/overlayfs/export.c
+++ b/fs/overlayfs/export.c
@@ -176,35 +176,37 @@ static int ovl_connect_layer(struct dentry *dentry)
*
* Return 0 for upper file handle, > 0 for lower file handle or < 0 on error.
*/
-static int ovl_check_encode_origin(struct dentry *dentry)
+static int ovl_check_encode_origin(struct inode *inode)
{
- struct ovl_fs *ofs = OVL_FS(dentry->d_sb);
+ struct ovl_fs *ofs = OVL_FS(inode->i_sb);
bool decodable = ofs->config.nfs_export;
+ struct dentry *dentry;
+ int err;
/* No upper layer? */
if (!ovl_upper_mnt(ofs))
return 1;
/* Lower file handle for non-upper non-decodable */
- if (!ovl_dentry_upper(dentry) && !decodable)
+ if (!ovl_inode_upper(inode) && !decodable)
return 1;
/* Upper file handle for pure upper */
- if (!ovl_dentry_lower(dentry))
+ if (!ovl_inode_lower(inode))
return 0;
/*
* Root is never indexed, so if there's an upper layer, encode upper for
* root.
*/
- if (dentry == dentry->d_sb->s_root)
+ if (inode == d_inode(inode->i_sb->s_root))
return 0;
/*
* Upper decodable file handle for non-indexed upper.
*/
- if (ovl_dentry_upper(dentry) && decodable &&
- !ovl_test_flag(OVL_INDEX, d_inode(dentry)))
+ if (ovl_inode_upper(inode) && decodable &&
+ !ovl_test_flag(OVL_INDEX, inode))
return 0;
/*
@@ -213,14 +215,23 @@ static int ovl_check_encode_origin(struct dentry *dentry)
* ovl_connect_layer() will try to make origin's layer "connected" by
* copying up a "connectable" ancestor.
*/
- if (d_is_dir(dentry) && decodable)
- return ovl_connect_layer(dentry);
+ if (!decodable || !S_ISDIR(inode->i_mode))
+ return 1;
+
+ dentry = d_find_any_alias(inode);
+ if (!dentry)
+ return -ENOENT;
+
+ err = ovl_connect_layer(dentry);
+ dput(dentry);
+ if (err < 0)
+ return err;
/* Lower file handle for indexed and non-upper dir/non-dir */
return 1;
}
-static int ovl_dentry_to_fid(struct ovl_fs *ofs, struct dentry *dentry,
+static int ovl_dentry_to_fid(struct ovl_fs *ofs, struct inode *inode,
u32 *fid, int buflen)
{
struct ovl_fh *fh = NULL;
@@ -231,13 +242,13 @@ static int ovl_dentry_to_fid(struct ovl_fs *ofs, struct dentry *dentry,
* Check if we should encode a lower or upper file handle and maybe
* copy up an ancestor to make lower file handle connectable.
*/
- err = enc_lower = ovl_check_encode_origin(dentry);
+ err = enc_lower = ovl_check_encode_origin(inode);
if (enc_lower < 0)
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);
@@ -251,8 +262,8 @@ out:
return err;
fail:
- pr_warn_ratelimited("failed to encode file handle (%pd2, err=%i)\n",
- dentry, err);
+ pr_warn_ratelimited("failed to encode file handle (ino=%lu, err=%i)\n",
+ inode->i_ino, err);
goto out;
}
@@ -260,19 +271,13 @@ static int ovl_encode_fh(struct inode *inode, u32 *fid, int *max_len,
struct inode *parent)
{
struct ovl_fs *ofs = OVL_FS(inode->i_sb);
- struct dentry *dentry;
int bytes, buflen = *max_len << 2;
/* TODO: encode connectable file handles */
if (parent)
return FILEID_INVALID;
- dentry = d_find_any_alias(inode);
- if (!dentry)
- return FILEID_INVALID;
-
- bytes = ovl_dentry_to_fid(ofs, dentry, fid, buflen);
- dput(dentry);
+ bytes = ovl_dentry_to_fid(ofs, inode, fid, buflen);
if (bytes <= 0)
return FILEID_INVALID;
diff --git a/fs/overlayfs/namei.c b/fs/overlayfs/namei.c
index 7e27b7d4adee..cea820cb3b55 100644
--- a/fs/overlayfs/namei.c
+++ b/fs/overlayfs/namei.c
@@ -542,7 +542,7 @@ int ovl_verify_origin_xattr(struct ovl_fs *ofs, struct dentry *dentry,
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;
@@ -738,7 +738,7 @@ int ovl_get_index_name(struct ovl_fs *ofs, struct dentry *origin,
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);
diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h
index b361f35762be..0021e2025020 100644
--- a/fs/overlayfs/overlayfs.h
+++ b/fs/overlayfs/overlayfs.h
@@ -865,7 +865,7 @@ int ovl_copy_up_with_data(struct dentry *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);
struct ovl_fh *ovl_get_origin_fh(struct ovl_fs *ofs, struct dentry *origin);
int ovl_set_origin_fh(struct ovl_fs *ofs, const struct ovl_fh *fh,
diff --git a/fs/overlayfs/util.c b/fs/overlayfs/util.c
index 9aa7493b1e10..0819c739cc2f 100644
--- a/fs/overlayfs/util.c
+++ b/fs/overlayfs/util.c
@@ -65,12 +65,12 @@ const struct cred *ovl_override_creds(struct super_block *sb)
{
struct ovl_fs *ofs = OVL_FS(sb);
- return override_creds_light(ofs->creator_cred);
+ return override_creds(ofs->creator_cred);
}
void ovl_revert_creds(const struct cred *old_cred)
{
- revert_creds_light(old_cred);
+ revert_creds(old_cred);
}
/*
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-30 10:06:30 +0100