[RFC PATCH v4 17/36] fuse-bpf: Add attr support

Daniel Rosenberg
2024-03-29T01:54:37Z

This adds backing support for FUSE_GETATTR, FUSE_SETATTR, and FUSE_STATFS

Signed-off-by: Daniel Rosenberg <drosen@google.com>
Signed-off-by: Paul Lawrence <paullawrence@google.com>
---
fs/fuse/backing.c | 296 ++++++++++++++++++++++++++++++++++++++++++++++
fs/fuse/dir.c | 67 ++---------
fs/fuse/fuse_i.h | 102 ++++++++++++++++
fs/fuse/inode.c | 17 +--
4 files changed, 412 insertions(+), 70 deletions(-)

diff --git a/fs/fuse/backing.c b/fs/fuse/backing.c
index 79f14634ae6a..e426268aa4e6 100644
--- a/fs/fuse/backing.c
+++ b/fs/fuse/backing.c
@@ -2054,6 +2054,302 @@ int fuse_bpf_unlink(int *out, struct inode *dir, struct dentry *entry)
dir, entry);
}

+struct fuse_getattr_args {
+ struct fuse_getattr_in in;
+ struct fuse_attr_out out;
+};
+
+static int fuse_getattr_initialize_in(struct bpf_fuse_args *fa, struct fuse_getattr_args *args,
+ const struct dentry *entry, struct kstat *stat,
+ u32 request_mask, unsigned int flags)
+{
+ args->in = (struct fuse_getattr_in) {
+ .getattr_flags = flags,
+ .fh = -1, /* TODO is this OK? */
+ };
+
+ *fa = (struct bpf_fuse_args) {
+ .info = (struct bpf_fuse_meta_info) {
+ .nodeid = get_node_id(entry->d_inode),
+ .opcode = FUSE_GETATTR,
+ },
+ .in_numargs = 1,
+ .in_args[0] = (struct bpf_fuse_arg) {
+ .size = sizeof(args->in),
+ .value = &args->in,
+ },
+ };
+
+ return 0;
+}
+
+static int fuse_getattr_initialize_out(struct bpf_fuse_args *fa, struct fuse_getattr_args *args,
+ const struct dentry *entry, struct kstat *stat,
+ u32 request_mask, unsigned int flags)
+{
+ args->out = (struct fuse_attr_out) { 0 };
+
+ fa->out_numargs = 1;
+ fa->out_args[0] = (struct bpf_fuse_arg) {
+ .size = sizeof(args->out),
+ .value = &args->out,
+ };
+
+ return 0;
+}
+
+/* TODO: unify with overlayfs */
+static inline int fuse_do_getattr(const struct path *path, struct kstat *stat,
+ u32 request_mask, unsigned int flags)
+{
+ if (flags & AT_GETATTR_NOSEC)
+ return vfs_getattr_nosec(path, stat, request_mask, flags);
+ return vfs_getattr(path, stat, request_mask, flags);
+}
+
+static int fuse_getattr_backing(struct bpf_fuse_args *fa, int *out,
+ const struct dentry *entry, struct kstat *stat,
+ u32 request_mask, unsigned int flags)
+{
+ struct path *backing_path = &get_fuse_dentry(entry)->backing_path;
+ struct inode *backing_inode = backing_path->dentry->d_inode;
+ struct fuse_attr_out *fao = fa->out_args[0].value;
+ struct kstat tmp;
+
+ if (!stat)
+ stat = &tmp;
+
+ *out = fuse_do_getattr(backing_path, stat, request_mask, flags);
+
+ if (!*out)
+ fuse_stat_to_attr(get_fuse_conn(entry->d_inode), backing_inode,
+ stat, &fao->attr);
+
+ return 0;
+}
+
+static int finalize_attr(struct inode *inode, struct fuse_attr_out *outarg,
+ u64 attr_version, struct kstat *stat)
+{
+ int err = 0;
+
+ if (fuse_invalid_attr(&outarg->attr) ||
+ ((inode->i_mode ^ outarg->attr.mode) & S_IFMT)) {
+ fuse_make_bad(inode);
+ err = -EIO;
+ } else {
+ fuse_change_attributes(inode, &outarg->attr, NULL,
+ ATTR_TIMEOUT(outarg), attr_version);
+ if (stat)
+ fuse_fillattr(inode, &outarg->attr, stat);
+ }
+ return err;
+}
+
+static int fuse_getattr_finalize(struct bpf_fuse_args *fa, int *out,
+ const struct dentry *entry, struct kstat *stat,
+ u32 request_mask, unsigned int flags)
+{
+ struct fuse_attr_out *outarg = fa->out_args[0].value;
+ struct inode *inode = entry->d_inode;
+ u64 attr_version = fuse_get_attr_version(get_fuse_mount(inode)->fc);
+
+ /* TODO: Ensure this doesn't happen if we had an error getting attrs in
+ * backing.
+ */
+ *out = finalize_attr(inode, outarg, attr_version, stat);
+ return 0;
+}
+
+int fuse_bpf_getattr(int *out, struct inode *inode, const struct dentry *entry, struct kstat *stat,
+ u32 request_mask, unsigned int flags)
+{
+ return bpf_fuse_backing(inode, struct fuse_getattr_args, out,
+ fuse_getattr_initialize_in, fuse_getattr_initialize_out,
+ fuse_getattr_backing, fuse_getattr_finalize,
+ entry, stat, request_mask, flags);
+}
+
+static void fattr_to_iattr(struct fuse_conn *fc,
+ const struct fuse_setattr_in *arg,
+ struct iattr *iattr)
+{
+ unsigned int fvalid = arg->valid;
+
+ if (fvalid & FATTR_MODE)
+ iattr->ia_valid |= ATTR_MODE, iattr->ia_mode = arg->mode;
+ if (fvalid & FATTR_UID) {
+ iattr->ia_valid |= ATTR_UID;
+ iattr->ia_uid = make_kuid(fc->user_ns, arg->uid);
+ }
+ if (fvalid & FATTR_GID) {
+ iattr->ia_valid |= ATTR_GID;
+ iattr->ia_gid = make_kgid(fc->user_ns, arg->gid);
+ }
+ if (fvalid & FATTR_SIZE)
+ iattr->ia_valid |= ATTR_SIZE, iattr->ia_size = arg->size;
+ if (fvalid & FATTR_ATIME) {
+ iattr->ia_valid |= ATTR_ATIME;
+ iattr->ia_atime.tv_sec = arg->atime;
+ iattr->ia_atime.tv_nsec = arg->atimensec;
+ if (!(fvalid & FATTR_ATIME_NOW))
+ iattr->ia_valid |= ATTR_ATIME_SET;
+ }
+ if (fvalid & FATTR_MTIME) {
+ iattr->ia_valid |= ATTR_MTIME;
+ iattr->ia_mtime.tv_sec = arg->mtime;
+ iattr->ia_mtime.tv_nsec = arg->mtimensec;
+ if (!(fvalid & FATTR_MTIME_NOW))
+ iattr->ia_valid |= ATTR_MTIME_SET;
+ }
+ if (fvalid & FATTR_CTIME) {
+ iattr->ia_valid |= ATTR_CTIME;
+ iattr->ia_ctime.tv_sec = arg->ctime;
+ iattr->ia_ctime.tv_nsec = arg->ctimensec;
+ }
+}
+
+struct fuse_setattr_args {
+ struct fuse_setattr_in in;
+ struct fuse_attr_out out;
+};
+
+static int fuse_setattr_initialize_in(struct bpf_fuse_args *fa, struct fuse_setattr_args *args,
+ struct dentry *dentry, struct iattr *attr, struct file *file)
+{
+ struct fuse_conn *fc = get_fuse_conn(dentry->d_inode);
+
+ *args = (struct fuse_setattr_args) { 0 };
+ iattr_to_fattr(fc, attr, &args->in, true);
+
+ *fa = (struct bpf_fuse_args) {
+ .info = (struct bpf_fuse_meta_info) {
+ .opcode = FUSE_SETATTR,
+ .nodeid = get_node_id(dentry->d_inode),
+ },
+ .in_numargs = 1,
+ .in_args[0].size = sizeof(args->in),
+ .in_args[0].value = &args->in,
+ };
+
+ return 0;
+}
+
+static int fuse_setattr_initialize_out(struct bpf_fuse_args *fa, struct fuse_setattr_args *args,
+ struct dentry *dentry, struct iattr *attr, struct file *file)
+{
+ fa->out_numargs = 1;
+ fa->out_args[0].size = sizeof(args->out);
+ fa->out_args[0].value = &args->out;
+
+ return 0;
+}
+
+static int fuse_setattr_backing(struct bpf_fuse_args *fa, int *out,
+ struct dentry *dentry, struct iattr *attr, struct file *file)
+{
+ struct fuse_conn *fc = get_fuse_conn(dentry->d_inode);
+ const struct fuse_setattr_in *fsi = fa->in_args[0].value;
+ struct iattr new_attr = { 0 };
+ struct path *backing_path = &get_fuse_dentry(dentry)->backing_path;
+
+ fattr_to_iattr(fc, fsi, &new_attr);
+ /* TODO: Some info doesn't get saved by the attr->fattr->attr transition
+ * When we actually allow the bpf to change these, we may have to consider
+ * the extra flags more, or pass more info into the bpf. Until then we can
+ * keep everything except for ATTR_FILE, since we'd need a file on the
+ * lower fs. For what it's worth, neither f2fs nor ext4 make use of that
+ * even if it is present.
+ */
+ new_attr.ia_valid = attr->ia_valid & ~ATTR_FILE;
+ inode_lock(d_inode(backing_path->dentry));
+ *out = notify_change(&nop_mnt_idmap, backing_path->dentry, &new_attr,
+ NULL);
+ inode_unlock(d_inode(backing_path->dentry));
+
+ if (*out == 0 && (new_attr.ia_valid & ATTR_SIZE))
+ i_size_write(dentry->d_inode, new_attr.ia_size);
+ return 0;
+}
+
+static int fuse_setattr_finalize(struct bpf_fuse_args *fa, int *out,
+ struct dentry *dentry, struct iattr *attr, struct file *file)
+{
+ return 0;
+}
+
+int fuse_bpf_setattr(int *out, struct inode *inode, struct dentry *dentry, struct iattr *attr, struct file *file)
+{
+ return bpf_fuse_backing(inode, struct fuse_setattr_args, out,
+ fuse_setattr_initialize_in, fuse_setattr_initialize_out,
+ fuse_setattr_backing, fuse_setattr_finalize,
+ dentry, attr, file);
+}
+
+static int fuse_statfs_initialize_in(struct bpf_fuse_args *fa, struct fuse_statfs_out *out,
+ struct dentry *dentry, struct kstatfs *buf)
+{
+ *fa = (struct bpf_fuse_args) {
+ .info = (struct bpf_fuse_meta_info) {
+ .nodeid = get_node_id(d_inode(dentry)),
+ .opcode = FUSE_STATFS,
+ },
+ };
+
+ return 0;
+}
+
+static int fuse_statfs_initialize_out(struct bpf_fuse_args *fa, struct fuse_statfs_out *out,
+ struct dentry *dentry, struct kstatfs *buf)
+{
+ *out = (struct fuse_statfs_out) { 0 };
+
+ fa->out_numargs = 1;
+ fa->out_args[0].size = sizeof(*out);
+ fa->out_args[0].value = out;
+
+ return 0;
+}
+
+static int fuse_statfs_backing(struct bpf_fuse_args *fa, int *out,
+ struct dentry *dentry, struct kstatfs *buf)
+{
+ struct path backing_path;
+ struct fuse_statfs_out *fso = fa->out_args[0].value;
+
+ *out = 0;
+ get_fuse_backing_path(dentry, &backing_path);
+ if (!backing_path.dentry)
+ return -EBADF;
+ *out = vfs_statfs(&backing_path, buf);
+ path_put(&backing_path);
+ buf->f_type = FUSE_SUPER_MAGIC;
+
+ //TODO Provide postfilter opportunity to modify
+ if (!*out)
+ convert_statfs_to_fuse(&fso->st, buf);
+
+ return 0;
+}
+
+static int fuse_statfs_finalize(struct bpf_fuse_args *fa, int *out,
+ struct dentry *dentry, struct kstatfs *buf)
+{
+ struct fuse_statfs_out *fso = fa->out_args[0].value;
+
+ if (!fa->info.error_in)
+ convert_fuse_statfs(buf, &fso->st);
+ return 0;
+}
+
+int fuse_bpf_statfs(int *out, struct inode *inode, struct dentry *dentry, struct kstatfs *buf)
+{
+ return bpf_fuse_backing(dentry->d_inode, struct fuse_statfs_out, out,
+ fuse_statfs_initialize_in, fuse_statfs_initialize_out,
+ fuse_statfs_backing, fuse_statfs_finalize,
+ dentry, buf);
+}
+
struct fuse_read_args {
struct fuse_read_in in;
struct fuse_read_out out;
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 0426243d9345..77d231ab1d9c 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -1256,7 +1256,7 @@ static int fuse_link(struct dentry *entry, struct inode *newdir,
return err;
}

-static void fuse_fillattr(struct inode *inode, struct fuse_attr *attr,
+void fuse_fillattr(struct inode *inode, struct fuse_attr *attr,
struct kstat *stat)
{
unsigned int blkbits;
@@ -1414,6 +1414,7 @@ static int fuse_do_getattr(struct inode *inode, struct kstat *stat,
}

static int fuse_update_get_attr(struct inode *inode, struct file *file,
+ const struct path *path,
struct kstat *stat, u32 request_mask,
unsigned int flags)
{
@@ -1424,6 +1425,8 @@ static int fuse_update_get_attr(struct inode *inode, struct file *file,
u32 inval_mask = READ_ONCE(fi->inval_mask);
u32 cache_mask = fuse_get_cache_mask(inode);

+ if (fuse_bpf_getattr(&err, inode, path->dentry, stat, request_mask, flags))
+ return err;

/* FUSE only supports basic stats and possibly btime */
request_mask &= STATX_BASIC_STATS | STATX_BTIME;
@@ -1469,7 +1472,7 @@ static int fuse_update_get_attr(struct inode *inode, struct file *file,

int fuse_update_attributes(struct inode *inode, struct file *file, u32 mask)
{
- return fuse_update_get_attr(inode, file, NULL, mask, 0);
+ return fuse_update_get_attr(inode, file, &file->f_path, NULL, mask, 0);
}

int fuse_reverse_inval_entry(struct fuse_conn *fc, u64 parent_nodeid,
@@ -1833,58 +1836,6 @@ static long fuse_dir_compat_ioctl(struct file *file, unsigned int cmd,
FUSE_IOCTL_COMPAT | FUSE_IOCTL_DIR);
}

-static inline bool update_mtime(unsigned int ivalid, bool trust_local_mtime)
-{
- /* Always update if mtime is explicitly set */
- if (ivalid & ATTR_MTIME_SET)
- return true;
-
- /* Or if kernel i_mtime is the official one */
- if (trust_local_mtime)
- return true;
-
- /* If it's an open(O_TRUNC) or an ftruncate(), don't update */
- if ((ivalid & ATTR_SIZE) && (ivalid & (ATTR_OPEN | ATTR_FILE)))
- return false;
-
- /* In all other cases update */
- return true;
-}
-
-static void iattr_to_fattr(struct fuse_conn *fc, struct iattr *iattr,
- struct fuse_setattr_in *arg, bool trust_local_cmtime)
-{
- unsigned ivalid = iattr->ia_valid;
-
- if (ivalid & ATTR_MODE)
- arg->valid |= FATTR_MODE, arg->mode = iattr->ia_mode;
- if (ivalid & ATTR_UID)
- arg->valid |= FATTR_UID, arg->uid = from_kuid(fc->user_ns, iattr->ia_uid);
- if (ivalid & ATTR_GID)
- arg->valid |= FATTR_GID, arg->gid = from_kgid(fc->user_ns, iattr->ia_gid);
- if (ivalid & ATTR_SIZE)
- arg->valid |= FATTR_SIZE, arg->size = iattr->ia_size;
- if (ivalid & ATTR_ATIME) {
- arg->valid |= FATTR_ATIME;
- arg->atime = iattr->ia_atime.tv_sec;
- arg->atimensec = iattr->ia_atime.tv_nsec;
- if (!(ivalid & ATTR_ATIME_SET))
- arg->valid |= FATTR_ATIME_NOW;
- }
- if ((ivalid & ATTR_MTIME) && update_mtime(ivalid, trust_local_cmtime)) {
- arg->valid |= FATTR_MTIME;
- arg->mtime = iattr->ia_mtime.tv_sec;
- arg->mtimensec = iattr->ia_mtime.tv_nsec;
- if (!(ivalid & ATTR_MTIME_SET) && !trust_local_cmtime)
- arg->valid |= FATTR_MTIME_NOW;
- }
- if ((ivalid & ATTR_CTIME) && trust_local_cmtime) {
- arg->valid |= FATTR_CTIME;
- arg->ctime = iattr->ia_ctime.tv_sec;
- arg->ctimensec = iattr->ia_ctime.tv_nsec;
- }
-}
-
/*
* Prevent concurrent writepages on inode
*
@@ -1999,6 +1950,9 @@ int fuse_do_setattr(struct dentry *dentry, struct iattr *attr,
bool trust_local_cmtime = is_wb;
bool fault_blocked = false;

+ if (fuse_bpf_setattr(&err, inode, dentry, attr, file))
+ return err;
+
if (!fc->default_permissions)
attr->ia_valid |= ATTR_FORCE;

@@ -2178,7 +2132,8 @@ static int fuse_setattr(struct mnt_idmap *idmap, struct dentry *entry,
* ia_mode calculation may have used stale i_mode.
* Refresh and recalculate.
*/
- ret = fuse_do_getattr(inode, NULL, file);
+ if (!fuse_bpf_getattr(&ret, inode, entry, NULL, 0, 0))
+ ret = fuse_do_getattr(inode, NULL, file);
if (ret)
return ret;

@@ -2235,7 +2190,7 @@ static int fuse_getattr(struct mnt_idmap *idmap,
return -EACCES;
}

- return fuse_update_get_attr(inode, NULL, stat, request_mask, flags);
+ return fuse_update_get_attr(inode, NULL, path, stat, request_mask, flags);
}

static const struct inode_operations fuse_dir_inode_operations = {
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index 8bd78a52a6b5..61a17071ab02 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -1460,6 +1460,10 @@ int fuse_bpf_file_read_iter(ssize_t *out, struct inode *inode, struct kiocb *ioc
int fuse_bpf_file_write_iter(ssize_t *out, struct inode *inode, struct kiocb *iocb, struct iov_iter *from);
int fuse_bpf_file_fallocate(int *out, struct inode *inode, struct file *file, int mode, loff_t offset, loff_t length);
int fuse_bpf_lookup(struct dentry **out, struct inode *dir, struct dentry *entry, unsigned int flags);
+int fuse_bpf_getattr(int *out, struct inode *inode, const struct dentry *entry, struct kstat *stat,
+ u32 request_mask, unsigned int flags);
+int fuse_bpf_setattr(int *out, struct inode *inode, struct dentry *dentry, struct iattr *attr, struct file *file);
+int fuse_bpf_statfs(int *out, struct inode *inode, struct dentry *dentry, struct kstatfs *buf);
int fuse_bpf_readdir(int *out, struct inode *inode, struct file *file, struct dir_context *ctx);
int fuse_bpf_access(int *out, struct inode *inode, int mask);

@@ -1559,6 +1563,22 @@ static inline int fuse_bpf_lookup(struct dentry **out, struct inode *dir, struct
return 0;
}

+static inline int fuse_bpf_getattr(int *out, struct inode *inode, const struct dentry *entry, struct kstat *stat,
+ u32 request_mask, unsigned int flags)
+{
+ return 0;
+}
+
+static inline int fuse_bpf_setattr(int *out, struct inode *inode, struct dentry *dentry, struct iattr *attr, struct file *file)
+{
+ return 0;
+}
+
+static inline int fuse_bpf_statfs(int *out, struct inode *inode, struct dentry *dentry, struct kstatfs *buf)
+{
+ return 0;
+}
+
static inline int fuse_bpf_readdir(int *out, struct inode *inode, struct file *file, struct dir_context *ctx)
{
return 0;
@@ -1577,6 +1597,88 @@ int fuse_handle_backing(struct fuse_bpf_entry *fbe, struct path *backing_path);

int fuse_revalidate_backing(struct dentry *entry, unsigned int flags);

+static inline bool update_mtime(unsigned int ivalid, bool trust_local_mtime)
+{
+ /* Always update if mtime is explicitly set */
+ if (ivalid & ATTR_MTIME_SET)
+ return true;
+
+ /* Or if kernel i_mtime is the official one */
+ if (trust_local_mtime)
+ return true;
+
+ /* If it's an open(O_TRUNC) or an ftruncate(), don't update */
+ if ((ivalid & ATTR_SIZE) && (ivalid & (ATTR_OPEN | ATTR_FILE)))
+ return false;
+
+ /* In all other cases update */
+ return true;
+}
+
+void fuse_fillattr(struct inode *inode, struct fuse_attr *attr,
+ struct kstat *stat);
+
+static inline void iattr_to_fattr(struct fuse_conn *fc, struct iattr *iattr,
+ struct fuse_setattr_in *arg, bool trust_local_cmtime)
+{
+ unsigned int ivalid = iattr->ia_valid;
+
+ if (ivalid & ATTR_MODE)
+ arg->valid |= FATTR_MODE, arg->mode = iattr->ia_mode;
+ if (ivalid & ATTR_UID)
+ arg->valid |= FATTR_UID, arg->uid = from_kuid(fc->user_ns, iattr->ia_uid);
+ if (ivalid & ATTR_GID)
+ arg->valid |= FATTR_GID, arg->gid = from_kgid(fc->user_ns, iattr->ia_gid);
+ if (ivalid & ATTR_SIZE)
+ arg->valid |= FATTR_SIZE, arg->size = iattr->ia_size;
+ if (ivalid & ATTR_ATIME) {
+ arg->valid |= FATTR_ATIME;
+ arg->atime = iattr->ia_atime.tv_sec;
+ arg->atimensec = iattr->ia_atime.tv_nsec;
+ if (!(ivalid & ATTR_ATIME_SET))
+ arg->valid |= FATTR_ATIME_NOW;
+ }
+ if ((ivalid & ATTR_MTIME) && update_mtime(ivalid, trust_local_cmtime)) {
+ arg->valid |= FATTR_MTIME;
+ arg->mtime = iattr->ia_mtime.tv_sec;
+ arg->mtimensec = iattr->ia_mtime.tv_nsec;
+ if (!(ivalid & ATTR_MTIME_SET) && !trust_local_cmtime)
+ arg->valid |= FATTR_MTIME_NOW;
+ }
+ if ((ivalid & ATTR_CTIME) && trust_local_cmtime) {
+ arg->valid |= FATTR_CTIME;
+ arg->ctime = iattr->ia_ctime.tv_sec;
+ arg->ctimensec = iattr->ia_ctime.tv_nsec;
+ }
+}
+
+static inline void convert_statfs_to_fuse(struct fuse_kstatfs *attr, struct kstatfs *stbuf)
+{
+ attr->bsize = stbuf->f_bsize;
+ attr->frsize = stbuf->f_frsize;
+ attr->blocks = stbuf->f_blocks;
+ attr->bfree = stbuf->f_bfree;
+ attr->bavail = stbuf->f_bavail;
+ attr->files = stbuf->f_files;
+ attr->ffree = stbuf->f_ffree;
+ attr->namelen = stbuf->f_namelen;
+ /* fsid is left zero */
+}
+
+static inline void convert_fuse_statfs(struct kstatfs *stbuf, struct fuse_kstatfs *attr)
+{
+ stbuf->f_type = FUSE_SUPER_MAGIC;
+ stbuf->f_bsize = attr->bsize;
+ stbuf->f_frsize = attr->frsize;
+ stbuf->f_blocks = attr->blocks;
+ stbuf->f_bfree = attr->bfree;
+ stbuf->f_bavail = attr->bavail;
+ stbuf->f_files = attr->files;
+ stbuf->f_ffree = attr->ffree;
+ stbuf->f_namelen = attr->namelen;
+ /* fsid is left zero */
+}
+
#ifdef CONFIG_FUSE_BPF
int __init fuse_bpf_init(void);
void __exit fuse_bpf_cleanup(void);
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 825b65117126..bc504e0d0e80 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -696,20 +696,6 @@ static void fuse_send_destroy(struct fuse_mount *fm)
}
}

-static void convert_fuse_statfs(struct kstatfs *stbuf, struct fuse_kstatfs *attr)
-{
- stbuf->f_type = FUSE_SUPER_MAGIC;
- stbuf->f_bsize = attr->bsize;
- stbuf->f_frsize = attr->frsize;
- stbuf->f_blocks = attr->blocks;
- stbuf->f_bfree = attr->bfree;
- stbuf->f_bavail = attr->bavail;
- stbuf->f_files = attr->files;
- stbuf->f_ffree = attr->ffree;
- stbuf->f_namelen = attr->namelen;
- /* fsid is left zero */
-}
-
static int fuse_statfs(struct dentry *dentry, struct kstatfs *buf)
{
struct super_block *sb = dentry->d_sb;
@@ -723,6 +709,9 @@ static int fuse_statfs(struct dentry *dentry, struct kstatfs *buf)
return 0;
}

+ if (fuse_bpf_statfs(&err, dentry->d_inode, dentry, buf))
+ return err;
+
memset(&outarg, 0, sizeof(outarg));
args.in_numargs = 0;
args.opcode = FUSE_STATFS;
--
2.44.0.478.gd926399ef9-goog