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path: root/fs/overlayfs/overlayfs.h
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-rw-r--r--fs/overlayfs/overlayfs.h304
1 files changed, 236 insertions, 68 deletions
diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h
index 9402591f12aa..f9ac9bdde830 100644
--- a/fs/overlayfs/overlayfs.h
+++ b/fs/overlayfs/overlayfs.h
@@ -7,6 +7,7 @@
#include <linux/kernel.h>
#include <linux/uuid.h>
#include <linux/fs.h>
+#include <linux/fsverity.h>
#include <linux/namei.h>
#include <linux/posix_acl.h>
#include <linux/posix_acl_xattr.h>
@@ -27,7 +28,16 @@ enum ovl_path_type {
#define OVL_XATTR_NAMESPACE "overlay."
#define OVL_XATTR_TRUSTED_PREFIX XATTR_TRUSTED_PREFIX OVL_XATTR_NAMESPACE
+#define OVL_XATTR_TRUSTED_PREFIX_LEN (sizeof(OVL_XATTR_TRUSTED_PREFIX) - 1)
#define OVL_XATTR_USER_PREFIX XATTR_USER_PREFIX OVL_XATTR_NAMESPACE
+#define OVL_XATTR_USER_PREFIX_LEN (sizeof(OVL_XATTR_USER_PREFIX) - 1)
+
+#define OVL_XATTR_ESCAPE_PREFIX OVL_XATTR_NAMESPACE
+#define OVL_XATTR_ESCAPE_PREFIX_LEN (sizeof(OVL_XATTR_ESCAPE_PREFIX) - 1)
+#define OVL_XATTR_ESCAPE_TRUSTED_PREFIX OVL_XATTR_TRUSTED_PREFIX OVL_XATTR_ESCAPE_PREFIX
+#define OVL_XATTR_ESCAPE_TRUSTED_PREFIX_LEN (sizeof(OVL_XATTR_ESCAPE_TRUSTED_PREFIX) - 1)
+#define OVL_XATTR_ESCAPE_USER_PREFIX OVL_XATTR_USER_PREFIX OVL_XATTR_ESCAPE_PREFIX
+#define OVL_XATTR_ESCAPE_USER_PREFIX_LEN (sizeof(OVL_XATTR_ESCAPE_USER_PREFIX) - 1)
enum ovl_xattr {
OVL_XATTR_OPAQUE,
@@ -36,8 +46,10 @@ enum ovl_xattr {
OVL_XATTR_IMPURE,
OVL_XATTR_NLINK,
OVL_XATTR_UPPER,
+ OVL_XATTR_UUID,
OVL_XATTR_METACOPY,
OVL_XATTR_PROTATTR,
+ OVL_XATTR_XWHITEOUT,
};
enum ovl_inode_flag {
@@ -49,12 +61,16 @@ enum ovl_inode_flag {
OVL_UPPERDATA,
/* Inode number will remain constant over copy up. */
OVL_CONST_INO,
+ OVL_HAS_DIGEST,
+ OVL_VERIFIED_DIGEST,
};
enum ovl_entry_flag {
OVL_E_UPPER_ALIAS,
OVL_E_OPAQUE,
OVL_E_CONNECTED,
+ /* Lower stack may contain xwhiteout entries */
+ OVL_E_XWHITEOUTS,
};
enum {
@@ -65,11 +81,24 @@ enum {
};
enum {
+ OVL_UUID_OFF,
+ OVL_UUID_NULL,
+ OVL_UUID_AUTO,
+ OVL_UUID_ON,
+};
+
+enum {
OVL_XINO_OFF,
OVL_XINO_AUTO,
OVL_XINO_ON,
};
+enum {
+ OVL_VERITY_OFF,
+ OVL_VERITY_ON,
+ OVL_VERITY_REQUIRE,
+};
+
/*
* The tuple (fh,uuid) is a universal unique identifier for a copy up origin,
* where:
@@ -126,6 +155,29 @@ struct ovl_fh {
#define OVL_FH_FID_OFFSET (OVL_FH_WIRE_OFFSET + \
offsetof(struct ovl_fb, fid))
+/* On-disk format for "metacopy" xattr (if non-zero size) */
+struct ovl_metacopy {
+ u8 version; /* 0 */
+ u8 len; /* size of this header + used digest bytes */
+ u8 flags;
+ u8 digest_algo; /* FS_VERITY_HASH_ALG_* constant, 0 for no digest */
+ u8 digest[FS_VERITY_MAX_DIGEST_SIZE]; /* Only the used part on disk */
+} __packed;
+
+#define OVL_METACOPY_MAX_SIZE (sizeof(struct ovl_metacopy))
+#define OVL_METACOPY_MIN_SIZE (OVL_METACOPY_MAX_SIZE - FS_VERITY_MAX_DIGEST_SIZE)
+#define OVL_METACOPY_INIT { 0, OVL_METACOPY_MIN_SIZE }
+
+static inline int ovl_metadata_digest_size(const struct ovl_metacopy *metacopy)
+{
+ if (metacopy->len < OVL_METACOPY_MIN_SIZE)
+ return 0;
+ return (int)metacopy->len - OVL_METACOPY_MIN_SIZE;
+}
+
+/* No atime modification on underlying */
+#define OVL_OPEN_FLAGS (O_NOATIME)
+
extern const char *const ovl_xattr_table[][2];
static inline const char *ovl_xattr(struct ovl_fs *ofs, enum ovl_xattr ox)
{
@@ -154,7 +206,7 @@ static inline int ovl_do_notify_change(struct ovl_fs *ofs,
static inline int ovl_do_rmdir(struct ovl_fs *ofs,
struct inode *dir, struct dentry *dentry)
{
- int err = vfs_rmdir(ovl_upper_mnt_idmap(ofs), dir, dentry);
+ int err = vfs_rmdir(ovl_upper_mnt_idmap(ofs), dir, dentry, NULL);
pr_debug("rmdir(%pd2) = %i\n", dentry, err);
return err;
@@ -183,26 +235,29 @@ static inline int ovl_do_create(struct ovl_fs *ofs,
struct inode *dir, struct dentry *dentry,
umode_t mode)
{
- int err = vfs_create(ovl_upper_mnt_idmap(ofs), dir, dentry, mode, true);
+ int err = vfs_create(ovl_upper_mnt_idmap(ofs), dentry, mode, NULL);
pr_debug("create(%pd2, 0%o) = %i\n", dentry, mode, err);
return err;
}
-static inline int ovl_do_mkdir(struct ovl_fs *ofs,
- struct inode *dir, struct dentry *dentry,
- umode_t mode)
+static inline struct dentry *ovl_do_mkdir(struct ovl_fs *ofs,
+ struct inode *dir,
+ struct dentry *dentry,
+ umode_t mode)
{
- int err = vfs_mkdir(ovl_upper_mnt_idmap(ofs), dir, dentry, mode);
- pr_debug("mkdir(%pd2, 0%o) = %i\n", dentry, mode, err);
- return err;
+ struct dentry *ret;
+
+ ret = vfs_mkdir(ovl_upper_mnt_idmap(ofs), dir, dentry, mode, NULL);
+ pr_debug("mkdir(%pd2, 0%o) = %i\n", dentry, mode, PTR_ERR_OR_ZERO(ret));
+ return ret;
}
static inline int ovl_do_mknod(struct ovl_fs *ofs,
struct inode *dir, struct dentry *dentry,
umode_t mode, dev_t dev)
{
- int err = vfs_mknod(ovl_upper_mnt_idmap(ofs), dir, dentry, mode, dev);
+ int err = vfs_mknod(ovl_upper_mnt_idmap(ofs), dir, dentry, mode, dev, NULL);
pr_debug("mknod(%pd2, 0%o, 0%o) = %i\n", dentry, mode, dev, err);
return err;
@@ -212,7 +267,7 @@ static inline int ovl_do_symlink(struct ovl_fs *ofs,
struct inode *dir, struct dentry *dentry,
const char *oldname)
{
- int err = vfs_symlink(ovl_upper_mnt_idmap(ofs), dir, dentry, oldname);
+ int err = vfs_symlink(ovl_upper_mnt_idmap(ofs), dir, dentry, oldname, NULL);
pr_debug("symlink(\"%s\", %pd2) = %i\n", oldname, dentry, err);
return err;
@@ -300,30 +355,36 @@ static inline int ovl_do_remove_acl(struct ovl_fs *ofs, struct dentry *dentry,
return vfs_remove_acl(ovl_upper_mnt_idmap(ofs), dentry, acl_name);
}
-static inline int ovl_do_rename(struct ovl_fs *ofs, struct inode *olddir,
- struct dentry *olddentry, struct inode *newdir,
- struct dentry *newdentry, unsigned int flags)
+static inline int ovl_do_rename_rd(struct renamedata *rd)
{
int err;
- struct renamedata rd = {
- .old_mnt_idmap = ovl_upper_mnt_idmap(ofs),
- .old_dir = olddir,
- .old_dentry = olddentry,
- .new_mnt_idmap = ovl_upper_mnt_idmap(ofs),
- .new_dir = newdir,
- .new_dentry = newdentry,
- .flags = flags,
- };
- pr_debug("rename(%pd2, %pd2, 0x%x)\n", olddentry, newdentry, flags);
- err = vfs_rename(&rd);
+ pr_debug("rename(%pd2, %pd2, 0x%x)\n", rd->old_dentry, rd->new_dentry,
+ rd->flags);
+ err = vfs_rename(rd);
if (err) {
pr_debug("...rename(%pd2, %pd2, ...) = %i\n",
- olddentry, newdentry, err);
+ rd->old_dentry, rd->new_dentry, err);
}
return err;
}
+static inline int ovl_do_rename(struct ovl_fs *ofs, struct dentry *olddir,
+ struct dentry *olddentry, struct dentry *newdir,
+ struct dentry *newdentry, unsigned int flags)
+{
+ struct renamedata rd = {
+ .mnt_idmap = ovl_upper_mnt_idmap(ofs),
+ .old_parent = olddir,
+ .old_dentry = olddentry,
+ .new_parent = newdir,
+ .new_dentry = newdentry,
+ .flags = flags,
+ };
+
+ return ovl_do_rename_rd(&rd);
+}
+
static inline int ovl_do_whiteout(struct ovl_fs *ofs,
struct inode *dir, struct dentry *dentry)
{
@@ -349,7 +410,32 @@ static inline struct dentry *ovl_lookup_upper(struct ovl_fs *ofs,
const char *name,
struct dentry *base, int len)
{
- return lookup_one(ovl_upper_mnt_idmap(ofs), name, base, len);
+ return lookup_one(ovl_upper_mnt_idmap(ofs), &QSTR_LEN(name, len), base);
+}
+
+static inline struct dentry *ovl_lookup_upper_unlocked(struct ovl_fs *ofs,
+ const char *name,
+ struct dentry *base,
+ int len)
+{
+ return lookup_one_unlocked(ovl_upper_mnt_idmap(ofs),
+ &QSTR_LEN(name, len), base);
+}
+
+static inline struct dentry *ovl_start_creating_upper(struct ovl_fs *ofs,
+ struct dentry *parent,
+ struct qstr *name)
+{
+ return start_creating(ovl_upper_mnt_idmap(ofs),
+ parent, name);
+}
+
+static inline struct dentry *ovl_start_removing_upper(struct ovl_fs *ofs,
+ struct dentry *parent,
+ struct qstr *name)
+{
+ return start_removing(ovl_upper_mnt_idmap(ofs),
+ parent, name);
}
static inline bool ovl_open_flags_need_copy_up(int flags)
@@ -361,10 +447,25 @@ static inline bool ovl_open_flags_need_copy_up(int flags)
}
/* util.c */
+int ovl_get_write_access(struct dentry *dentry);
+void ovl_put_write_access(struct dentry *dentry);
+void ovl_start_write(struct dentry *dentry);
+void ovl_end_write(struct dentry *dentry);
int ovl_want_write(struct dentry *dentry);
void ovl_drop_write(struct dentry *dentry);
struct dentry *ovl_workdir(struct dentry *dentry);
const struct cred *ovl_override_creds(struct super_block *sb);
+
+EXTEND_CLASS(override_creds, _ovl, ovl_override_creds(sb), struct super_block *sb)
+
+#define with_ovl_creds(sb) \
+ scoped_class(override_creds_ovl, __UNIQUE_ID(label), sb)
+
+static inline const struct cred *ovl_creds(struct super_block *sb)
+{
+ return OVL_FS(sb)->creator_cred;
+}
+
int ovl_can_decode_fh(struct super_block *sb);
struct dentry *ovl_indexdir(struct super_block *sb);
bool ovl_index_all(struct super_block *sb);
@@ -382,6 +483,12 @@ void ovl_dentry_init_reval(struct dentry *dentry, struct dentry *upperdentry,
void ovl_dentry_init_flags(struct dentry *dentry, struct dentry *upperdentry,
struct ovl_entry *oe, unsigned int mask);
bool ovl_dentry_weird(struct dentry *dentry);
+
+static inline bool ovl_dentry_casefolded(struct dentry *dentry)
+{
+ return sb_has_encoding(dentry->d_sb) && IS_CASEFOLDED(d_inode(dentry));
+}
+
enum ovl_path_type ovl_path_type(struct dentry *dentry);
void ovl_path_upper(struct dentry *dentry, struct path *path);
void ovl_path_lower(struct dentry *dentry, struct path *path);
@@ -411,6 +518,10 @@ bool ovl_dentry_test_flag(unsigned long flag, struct dentry *dentry);
bool ovl_dentry_is_opaque(struct dentry *dentry);
bool ovl_dentry_is_whiteout(struct dentry *dentry);
void ovl_dentry_set_opaque(struct dentry *dentry);
+bool ovl_dentry_has_xwhiteouts(struct dentry *dentry);
+void ovl_dentry_set_xwhiteouts(struct dentry *dentry);
+void ovl_layer_set_xwhiteouts(struct ovl_fs *ofs,
+ const struct ovl_layer *layer);
bool ovl_dentry_has_upper_alias(struct dentry *dentry);
void ovl_dentry_set_upper_alias(struct dentry *dentry);
bool ovl_dentry_needs_data_copy_up(struct dentry *dentry, int flags);
@@ -423,13 +534,27 @@ void ovl_inode_update(struct inode *inode, struct dentry *upperdentry);
void ovl_dir_modified(struct dentry *dentry, bool impurity);
u64 ovl_inode_version_get(struct inode *inode);
bool ovl_is_whiteout(struct dentry *dentry);
+bool ovl_path_is_whiteout(struct ovl_fs *ofs, const struct path *path);
struct file *ovl_path_open(const struct path *path, int flags);
int ovl_copy_up_start(struct dentry *dentry, int flags);
void ovl_copy_up_end(struct dentry *dentry);
bool ovl_already_copied_up(struct dentry *dentry, int flags);
-bool ovl_path_check_dir_xattr(struct ovl_fs *ofs, const struct path *path,
- enum ovl_xattr ox);
+char ovl_get_dir_xattr_val(struct ovl_fs *ofs, const struct path *path,
+ enum ovl_xattr ox);
bool ovl_path_check_origin_xattr(struct ovl_fs *ofs, const struct path *path);
+bool ovl_path_check_xwhiteout_xattr(struct ovl_fs *ofs, const struct path *path);
+bool ovl_init_uuid_xattr(struct super_block *sb, struct ovl_fs *ofs,
+ const struct path *upperpath);
+
+static inline bool ovl_upper_is_whiteout(struct ovl_fs *ofs,
+ struct dentry *upperdentry)
+{
+ struct path upperpath = {
+ .dentry = upperdentry,
+ .mnt = ovl_upper_mnt(ofs),
+ };
+ return ovl_path_is_whiteout(ofs, &upperpath);
+}
static inline bool ovl_check_origin_xattr(struct ovl_fs *ofs,
struct dentry *upperdentry)
@@ -451,10 +576,20 @@ bool ovl_is_inuse(struct dentry *dentry);
bool ovl_need_index(struct dentry *dentry);
int ovl_nlink_start(struct dentry *dentry);
void ovl_nlink_end(struct dentry *dentry);
-int ovl_lock_rename_workdir(struct dentry *workdir, struct dentry *upperdir);
-int ovl_check_metacopy_xattr(struct ovl_fs *ofs, const struct path *path);
+int ovl_lock_rename_workdir(struct dentry *workdir, struct dentry *work,
+ struct dentry *upperdir, struct dentry *upper);
+int ovl_check_metacopy_xattr(struct ovl_fs *ofs, const struct path *path,
+ struct ovl_metacopy *data);
+int ovl_set_metacopy_xattr(struct ovl_fs *ofs, struct dentry *d,
+ struct ovl_metacopy *metacopy);
bool ovl_is_metacopy_dentry(struct dentry *dentry);
char *ovl_get_redirect_xattr(struct ovl_fs *ofs, const struct path *path, int padding);
+int ovl_ensure_verity_loaded(const struct path *path);
+int ovl_validate_verity(struct ovl_fs *ofs,
+ const struct path *metapath,
+ const struct path *datapath);
+int ovl_get_verity_digest(struct ovl_fs *ofs, const struct path *src,
+ struct ovl_metacopy *metacopy);
int ovl_sync_status(struct ovl_fs *ofs);
static inline void ovl_set_flag(unsigned long flag, struct inode *inode)
@@ -481,7 +616,13 @@ static inline bool ovl_is_impuredir(struct super_block *sb,
.mnt = ovl_upper_mnt(ofs),
};
- return ovl_path_check_dir_xattr(ofs, &upperpath, OVL_XATTR_IMPURE);
+ return ovl_get_dir_xattr_val(ofs, &upperpath, OVL_XATTR_IMPURE) == 'y';
+}
+
+static inline char ovl_get_opaquedir_val(struct ovl_fs *ofs,
+ const struct path *path)
+{
+ return ovl_get_dir_xattr_val(ofs, path, OVL_XATTR_OPAQUE);
}
static inline bool ovl_redirect_follow(struct ovl_fs *ofs)
@@ -494,6 +635,17 @@ static inline bool ovl_redirect_dir(struct ovl_fs *ofs)
return ofs->config.redirect_mode == OVL_REDIRECT_ON;
}
+static inline bool ovl_origin_uuid(struct ovl_fs *ofs)
+{
+ return ofs->config.uuid != OVL_UUID_OFF;
+}
+
+static inline bool ovl_has_fsid(struct ovl_fs *ofs)
+{
+ return ofs->config.uuid == OVL_UUID_ON ||
+ ofs->config.uuid == OVL_UUID_AUTO;
+}
+
/*
* With xino=auto, we do best effort to keep all inodes on same st_dev and
* d_ino consistent with st_ino.
@@ -563,33 +715,45 @@ struct dentry *ovl_decode_real_fh(struct ovl_fs *ofs, struct ovl_fh *fh,
int ovl_check_origin_fh(struct ovl_fs *ofs, struct ovl_fh *fh, bool connected,
struct dentry *upperdentry, struct ovl_path **stackp);
int ovl_verify_set_fh(struct ovl_fs *ofs, struct dentry *dentry,
- enum ovl_xattr ox, struct dentry *real, bool is_upper,
- bool set);
+ enum ovl_xattr ox, const struct ovl_fh *fh,
+ bool is_upper, bool set);
+int ovl_verify_origin_xattr(struct ovl_fs *ofs, struct dentry *dentry,
+ enum ovl_xattr ox, struct dentry *real,
+ bool is_upper, bool set);
struct dentry *ovl_index_upper(struct ovl_fs *ofs, struct dentry *index,
bool connected);
int ovl_verify_index(struct ovl_fs *ofs, struct dentry *index);
+int ovl_get_index_name_fh(const struct ovl_fh *fh, struct qstr *name);
int ovl_get_index_name(struct ovl_fs *ofs, struct dentry *origin,
struct qstr *name);
struct dentry *ovl_get_index_fh(struct ovl_fs *ofs, struct ovl_fh *fh);
struct dentry *ovl_lookup_index(struct ovl_fs *ofs, struct dentry *upper,
struct dentry *origin, bool verify);
-int ovl_path_next(int idx, struct dentry *dentry, struct path *path);
-int ovl_maybe_lookup_lowerdata(struct dentry *dentry);
+int ovl_path_next(int idx, struct dentry *dentry, struct path *path,
+ const struct ovl_layer **layer);
+int ovl_verify_lowerdata(struct dentry *dentry);
struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry,
unsigned int flags);
bool ovl_lower_positive(struct dentry *dentry);
+static inline int ovl_verify_origin_fh(struct ovl_fs *ofs, struct dentry *upper,
+ const struct ovl_fh *fh, bool set)
+{
+ return ovl_verify_set_fh(ofs, upper, OVL_XATTR_ORIGIN, fh, false, set);
+}
+
static inline int ovl_verify_origin(struct ovl_fs *ofs, struct dentry *upper,
struct dentry *origin, bool set)
{
- return ovl_verify_set_fh(ofs, upper, OVL_XATTR_ORIGIN, origin,
- false, set);
+ return ovl_verify_origin_xattr(ofs, upper, OVL_XATTR_ORIGIN, origin,
+ false, set);
}
static inline int ovl_verify_upper(struct ovl_fs *ofs, struct dentry *index,
struct dentry *upper, bool set)
{
- return ovl_verify_set_fh(ofs, index, OVL_XATTR_UPPER, upper, true, set);
+ return ovl_verify_origin_xattr(ofs, index, OVL_XATTR_UPPER, upper,
+ true, set);
}
/* readdir.c */
@@ -601,7 +765,7 @@ void ovl_cleanup_whiteouts(struct ovl_fs *ofs, struct dentry *upper,
void ovl_cache_free(struct list_head *list);
void ovl_dir_cache_free(struct inode *inode);
int ovl_check_d_type_supported(const struct path *realpath);
-int ovl_workdir_cleanup(struct ovl_fs *ofs, struct inode *dir,
+int ovl_workdir_cleanup(struct ovl_fs *ofs, struct dentry *parent,
struct vfsmount *mnt, struct dentry *dentry, int level);
int ovl_indexdir_cleanup(struct ovl_fs *ofs);
@@ -623,17 +787,8 @@ int ovl_set_nlink_lower(struct dentry *dentry);
unsigned int ovl_get_nlink(struct ovl_fs *ofs, struct dentry *lowerdentry,
struct dentry *upperdentry,
unsigned int fallback);
-int ovl_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
- struct iattr *attr);
-int ovl_getattr(struct mnt_idmap *idmap, const struct path *path,
- struct kstat *stat, u32 request_mask, unsigned int flags);
int ovl_permission(struct mnt_idmap *idmap, struct inode *inode,
int mask);
-int ovl_xattr_set(struct dentry *dentry, struct inode *inode, const char *name,
- const void *value, size_t size, int flags);
-int ovl_xattr_get(struct dentry *dentry, struct inode *inode, const char *name,
- void *value, size_t size);
-ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size);
#ifdef CONFIG_FS_POSIX_ACL
struct posix_acl *do_ovl_get_acl(struct mnt_idmap *idmap,
@@ -665,7 +820,7 @@ static inline struct posix_acl *ovl_get_acl_path(const struct path *path,
}
#endif
-int ovl_update_time(struct inode *inode, struct timespec64 *ts, int flags);
+int ovl_update_time(struct inode *inode, int flags);
bool ovl_is_private_xattr(struct super_block *sb, const char *name);
struct ovl_inode_params {
@@ -687,10 +842,12 @@ 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.
@@ -704,7 +861,7 @@ void ovl_copyattr(struct inode *to);
void ovl_check_protattr(struct inode *inode, struct dentry *upper);
int ovl_set_protattr(struct inode *inode, struct dentry *upper,
- struct fileattr *fa);
+ struct file_kattr *fa);
static inline void ovl_copyflags(struct inode *from, struct inode *to)
{
@@ -715,7 +872,7 @@ static inline void ovl_copyflags(struct inode *from, struct inode *to)
/* dir.c */
extern const struct inode_operations ovl_dir_inode_operations;
-int ovl_cleanup_and_whiteout(struct ovl_fs *ofs, struct inode *dir,
+int ovl_cleanup_and_whiteout(struct ovl_fs *ofs, struct dentry *dir,
struct dentry *dentry);
struct ovl_cattr {
dev_t rdev;
@@ -726,25 +883,25 @@ struct ovl_cattr {
#define OVL_CATTR(m) (&(struct ovl_cattr) { .mode = (m) })
-int ovl_mkdir_real(struct ovl_fs *ofs, struct inode *dir,
- struct dentry **newdentry, umode_t mode);
struct dentry *ovl_create_real(struct ovl_fs *ofs,
- struct inode *dir, struct dentry *newdentry,
+ struct dentry *parent, struct dentry *newdentry,
struct ovl_cattr *attr);
-int ovl_cleanup(struct ovl_fs *ofs, struct inode *dir, struct dentry *dentry);
-struct dentry *ovl_lookup_temp(struct ovl_fs *ofs, struct dentry *workdir);
+int ovl_cleanup(struct ovl_fs *ofs, struct dentry *workdir, struct dentry *dentry);
+#define OVL_TEMPNAME_SIZE 20
+void ovl_tempname(char name[OVL_TEMPNAME_SIZE]);
struct dentry *ovl_create_temp(struct ovl_fs *ofs, struct dentry *workdir,
struct ovl_cattr *attr);
/* file.c */
extern const struct file_operations ovl_file_operations;
-int __init ovl_aio_request_cache_init(void);
-void ovl_aio_request_cache_destroy(void);
-int ovl_real_fileattr_get(const struct path *realpath, struct fileattr *fa);
-int ovl_real_fileattr_set(const struct path *realpath, struct fileattr *fa);
-int ovl_fileattr_get(struct dentry *dentry, struct fileattr *fa);
+int ovl_real_fileattr_get(const struct path *realpath, struct file_kattr *fa);
+int ovl_real_fileattr_set(const struct path *realpath, struct file_kattr *fa);
+int ovl_fileattr_get(struct dentry *dentry, struct file_kattr *fa);
int ovl_fileattr_set(struct mnt_idmap *idmap,
- struct dentry *dentry, struct fileattr *fa);
+ struct dentry *dentry, struct file_kattr *fa);
+struct ovl_file;
+struct ovl_file *ovl_file_alloc(struct file *realfile);
+void ovl_file_free(struct ovl_file *of);
/* copy_up.c */
int ovl_copy_up(struct dentry *dentry);
@@ -752,13 +909,15 @@ 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);
-int ovl_set_origin(struct ovl_fs *ofs, struct dentry *lower,
- struct dentry *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,
+ struct dentry *upper);
/* export.c */
extern const struct export_operations ovl_export_operations;
+extern const struct export_operations ovl_export_fid_operations;
/* super.c */
int ovl_fill_super(struct super_block *sb, struct fs_context *fc);
@@ -768,3 +927,12 @@ static inline bool ovl_force_readonly(struct ovl_fs *ofs)
{
return (!ovl_upper_mnt(ofs) || !ofs->workdir);
}
+
+/* xattr.c */
+
+const struct xattr_handler * const *ovl_xattr_handlers(struct ovl_fs *ofs);
+int ovl_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
+ struct iattr *attr);
+int ovl_getattr(struct mnt_idmap *idmap, const struct path *path,
+ struct kstat *stat, u32 request_mask, unsigned int flags);
+ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size);
generated by cgit (git 2.34.1) at 2025-12-25 12:50:23 +0000