c/mirror_zfs
1
0
Fork 0
mirror of https://git.proxmox.com/git/mirror_zfs.git synced 2026-05-22 18:40:43 +03:00
Code Issues Packages Projects Releases Wiki Activity

Linux 6.3 compat: idmapped mount API changes

Browse Source 
Linux kernel 6.3 changed a bunch of APIs to use the dedicated idmap
type for mounts (struct mnt_idmap), we need to detect these changes
and make zfs work with the new APIs.

NOTE: This backport only includes the configure checks to detect
the 6.3 idmap API changes.  It does not include support for idmap.
When provided the idmap variable is ignored in most case in the
same way the user_ns argument was ignored.  This change is solely
to provide compatibility with the new interfaces.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Youzhong Yang <yyang@mathworks.com>
Closes #14682
This commit is contained in:
youzhongyang
2023-04-10 17:15:36 -04:00
committed by Tony Hutter
parent 04305bbd18
commit f0aca5f7bb
28 changed files with 708 additions and 166 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/os/linux/kernel/linux/vfs_compat.h
+19 -2
View File
@@ -344,7 +344,8 @@ static inline void zfs_gid_write(struct inode *ip, gid_t gid)
* 4.9 API change
*/
#if !(defined(HAVE_SETATTR_PREPARE_NO_USERNS) || \
defined(HAVE_SETATTR_PREPARE_USERNS))
defined(HAVE_SETATTR_PREPARE_USERNS) || \
defined(HAVE_SETATTR_PREPARE_IDMAP))
static inline int
setattr_prepare(struct dentry *dentry, struct iattr *ia)
{
@@ -399,6 +400,15 @@ func(struct user_namespace *user_ns, const struct path *path, \
return (func##_impl(user_ns, path, stat, request_mask, \
query_flags)); \
}
#elif defined(HAVE_IDMAP_IOPS_GETATTR)
#define ZPL_GETATTR_WRAPPER(func) \
static int \
func(struct mnt_idmap *user_ns, const struct path *path, \
struct kstat *stat, u32 request_mask, unsigned int query_flags) \
{ \
return (func##_impl(user_ns, path, stat, request_mask, \
query_flags)); \
}
#else
#error
#endif
@@ -450,8 +460,15 @@ zpl_is_32bit_api(void)
* 5.12 API change
* To support id-mapped mounts, generic_fillattr() was modified to
* accept a new struct user_namespace* as its first arg.
*
* 6.3 API change
* generic_fillattr() first arg is changed to struct mnt_idmap *
*
*/
#ifdef HAVE_GENERIC_FILLATTR_USERNS
#ifdef HAVE_GENERIC_FILLATTR_IDMAP
#define zpl_generic_fillattr(idmap, ip, sp) \
generic_fillattr(idmap, ip, sp)
#elif defined(HAVE_GENERIC_FILLATTR_USERNS)
#define zpl_generic_fillattr(user_ns, ip, sp) \
generic_fillattr(user_ns, ip, sp)
#else
include/os/linux/kernel/linux/xattr_compat.h
+22 -5
View File
@@ -133,20 +133,35 @@ fn(const struct xattr_handler *handler, struct dentry *dentry, \
#error "Unsupported kernel"
#endif
/*
* 6.3 API change,
* The xattr_handler->set() callback was changed to take the
* struct mnt_idmap* as the first arg, to support idmapped
* mounts.
*/
#if defined(HAVE_XATTR_SET_IDMAP)
#define ZPL_XATTR_SET_WRAPPER(fn) \
static int \
fn(const struct xattr_handler *handler, struct mnt_idmap *user_ns, \
struct dentry *dentry, struct inode *inode, const char *name, \
const void *buffer, size_t size, int flags) \
{ \
return (__ ## fn(user_ns, inode, name, buffer, size, flags)); \
}
/*
* 5.12 API change,
* The xattr_handler->set() callback was changed to take the
* struct user_namespace* as the first arg, to support idmapped
* mounts.
*/
#if defined(HAVE_XATTR_SET_USERNS)
#elif defined(HAVE_XATTR_SET_USERNS)
#define ZPL_XATTR_SET_WRAPPER(fn) \
static int \
fn(const struct xattr_handler *handler, struct user_namespace *user_ns, \
struct dentry *dentry, struct inode *inode, const char *name, \
const void *buffer, size_t size, int flags) \
{ \
return (__ ## fn(inode, name, buffer, size, flags)); \
return (__ ## fn(user_ns, inode, name, buffer, size, flags)); \
}
/*
* 4.7 API change,
@@ -160,7 +175,7 @@ fn(const struct xattr_handler *handler, struct dentry *dentry, \
struct inode *inode, const char *name, const void *buffer, \
size_t size, int flags) \
{ \
return (__ ## fn(inode, name, buffer, size, flags)); \
return (__ ## fn(kcred->user_ns, inode, name, buffer, size, flags));\
}
/*
* 4.4 API change,
@@ -174,7 +189,8 @@ static int \
fn(const struct xattr_handler *handler, struct dentry *dentry, \
const char *name, const void *buffer, size_t size, int flags) \
{ \
return (__ ## fn(dentry->d_inode, name, buffer, size, flags)); \
return (__ ## fn(kcred->user_ns, dentry->d_inode, name, \
buffer, size, flags)); \
}
/*
* 2.6.33 API change,
@@ -187,7 +203,8 @@ static int \
fn(struct dentry *dentry, const char *name, const void *buffer, \
size_t size, int flags, int unused_handler_flags) \
{ \
return (__ ## fn(dentry->d_inode, name, buffer, size, flags)); \
return (__ ## fn(kcred->user_ns, dentry->d_inode, name, buffer, \
size, flags)); \
}
#else
#error "Unsupported kernel"
include/os/linux/spl/sys/cred.h
+2
View File
@@ -45,6 +45,8 @@ typedef struct cred cred_t;
#define SGID_TO_KGID(x) (KGIDT_INIT(x))
#define KGIDP_TO_SGIDP(x) (&(x)->val)
extern zidmap_t *zfs_get_init_idmap(void);
extern void crhold(cred_t *cr);
extern void crfree(cred_t *cr);
extern uid_t crgetuid(const cred_t *cr);
include/os/linux/spl/sys/types.h
+14
View File
@@ -54,4 +54,18 @@ typedef ulong_t pgcnt_t;
typedef int major_t;
typedef int minor_t;
struct user_namespace;
#ifdef HAVE_IOPS_CREATE_IDMAP
#include <linux/refcount.h>
struct mnt_idmap {
struct user_namespace *owner;
refcount_t count;
};
typedef struct mnt_idmap zidmap_t;
#else
typedef struct user_namespace zidmap_t;
#endif
extern zidmap_t *zfs_init_idmap;
#endif /* _SPL_TYPES_H */
include/os/linux/zfs/sys/zfs_vnops_os.h
+1 -2
View File
@@ -54,8 +54,7 @@ extern int zfs_mkdir(znode_t *dzp, char *dirname, vattr_t *vap,
extern int zfs_rmdir(znode_t *dzp, char *name, znode_t *cwd,
cred_t *cr, int flags);
extern int zfs_readdir(struct inode *ip, zpl_dir_context_t *ctx, cred_t *cr);
extern int zfs_getattr_fast(struct user_namespace *, struct inode *ip,
struct kstat *sp);
extern int zfs_getattr_fast(zidmap_t *, struct inode *ip, struct kstat *sp);
extern int zfs_setattr(znode_t *zp, vattr_t *vap, int flag, cred_t *cr);
extern int zfs_rename(znode_t *sdzp, char *snm, znode_t *tdzp,
char *tnm, cred_t *cr, int flags);
include/os/linux/zfs/sys/zpl.h
+8 -3
View File
@@ -64,7 +64,10 @@ extern int zpl_xattr_security_init(struct inode *ip, struct inode *dip,
const struct qstr *qstr);
#if defined(CONFIG_FS_POSIX_ACL)
#if defined(HAVE_SET_ACL)
#if defined(HAVE_SET_ACL_USERNS)
#if defined(HAVE_SET_ACL_IDMAP_DENTRY)
extern int zpl_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
struct posix_acl *acl, int type);
#elif defined(HAVE_SET_ACL_USERNS)
extern int zpl_set_acl(struct user_namespace *userns, struct inode *ip,
struct posix_acl *acl, int type);
#elif defined(HAVE_SET_ACL_USERNS_DENTRY_ARG2)
@@ -186,13 +189,15 @@ zpl_dir_emit_dots(struct file *file, zpl_dir_context_t *ctx)
#if defined(HAVE_INODE_OWNER_OR_CAPABLE)
#define zpl_inode_owner_or_capable(ns, ip) inode_owner_or_capable(ip)
#elif defined(HAVE_INODE_OWNER_OR_CAPABLE_IDMAPPED)
#elif defined(HAVE_INODE_OWNER_OR_CAPABLE_USERNS)
#define zpl_inode_owner_or_capable(ns, ip) inode_owner_or_capable(ns, ip)
#elif defined(HAVE_INODE_OWNER_OR_CAPABLE_IDMAP)
#define zpl_inode_owner_or_capable(idmap, ip) inode_owner_or_capable(idmap, ip)
#else
#error "Unsupported kernel"
#endif
#ifdef HAVE_SETATTR_PREPARE_USERNS
#if defined(HAVE_SETATTR_PREPARE_USERNS) || defined(HAVE_SETATTR_PREPARE_IDMAP)
#define zpl_setattr_prepare(ns, dentry, ia) setattr_prepare(ns, dentry, ia)
#else
/*