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Linux 6.3 compat: idmapped mount API changes

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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.

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 GitHub
parent d0cbd9feaf
commit d4dc53dad2
40 changed files with 823 additions and 296 deletions
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include/os/linux/kernel/linux/vfs_compat.h
+19 -2
View File
@@ -341,7 +341,8 @@ 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)
{
@@ -396,6 +397,15 @@ 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
@@ -447,8 +457,15 @@ 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
+16 -1
View File
@@ -133,13 +133,28 @@ 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, \