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Linux 6.8 compat: handle mnt_idmap user_namespace change

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struct mnt_idmap no longer has a struct user_namespace within it. Work
around this by creating a temporary with the copy of the map we need
taken from the idmap.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Co-authored-by: Youzhong Yang <yyang@mathworks.com>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Sponsored-by: https://despairlabs.com/sponsor/
Closes #15805
This commit is contained in:
Rob Norris
2024-01-23 21:14:06 +11:00
committed by Brian Behlendorf
parent 7a2e54b7d3
commit 2e6b3c4d94
4 changed files with 88 additions and 5 deletions
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include/os/linux/spl/sys/cred.h
+50 -5
View File
@@ -73,13 +73,25 @@ static inline struct user_namespace *zfs_i_user_ns(struct inode *inode)
static inline boolean_t zfs_no_idmapping(struct user_namespace *mnt_userns,
struct user_namespace *fs_userns)
{
return (zfs_is_init_userns(mnt_userns) || mnt_userns == fs_userns);
return (zfs_is_init_userns(mnt_userns) ||
mnt_userns == fs_userns);
}
static inline uid_t zfs_uid_to_vfsuid(zidmap_t *mnt_userns,
struct user_namespace *fs_userns, uid_t uid)
{
struct user_namespace *owner = idmap_owner(mnt_userns);
struct user_namespace *owner;
#ifdef HAVE_IOPS_CREATE_IDMAP
if (mnt_userns == zfs_init_idmap)
return (uid);
#endif
#ifdef HAVE_IDMAP_NO_USERNS
struct user_namespace ns;
ns.uid_map = mnt_userns->uid_map;
owner = &ns;
#else
owner = idmap_owner(mnt_userns);
#endif
if (zfs_no_idmapping(owner, fs_userns))
return (uid);
if (!zfs_is_init_userns(fs_userns))
@@ -92,7 +104,18 @@ static inline uid_t zfs_uid_to_vfsuid(zidmap_t *mnt_userns,
static inline gid_t zfs_gid_to_vfsgid(zidmap_t *mnt_userns,
struct user_namespace *fs_userns, gid_t gid)
{
struct user_namespace *owner = idmap_owner(mnt_userns);
struct user_namespace *owner;
#ifdef HAVE_IOPS_CREATE_IDMAP
if (mnt_userns == zfs_init_idmap)
return (gid);
#endif
#ifdef HAVE_IDMAP_NO_USERNS
struct user_namespace ns;
ns.gid_map = mnt_userns->gid_map;
owner = &ns;
#else
owner = idmap_owner(mnt_userns);
#endif
if (zfs_no_idmapping(owner, fs_userns))
return (gid);
if (!zfs_is_init_userns(fs_userns))
@@ -105,7 +128,18 @@ static inline gid_t zfs_gid_to_vfsgid(zidmap_t *mnt_userns,
static inline uid_t zfs_vfsuid_to_uid(zidmap_t *mnt_userns,
struct user_namespace *fs_userns, uid_t uid)
{
struct user_namespace *owner = idmap_owner(mnt_userns);
struct user_namespace *owner;
#ifdef HAVE_IOPS_CREATE_IDMAP
if (mnt_userns == zfs_init_idmap)
return (uid);
#endif
#ifdef HAVE_IDMAP_NO_USERNS
struct user_namespace ns;
ns.uid_map = mnt_userns->uid_map;
owner = &ns;
#else
owner = idmap_owner(mnt_userns);
#endif
if (zfs_no_idmapping(owner, fs_userns))
return (uid);
uid = from_kuid(owner, KUIDT_INIT(uid));
@@ -119,7 +153,18 @@ static inline uid_t zfs_vfsuid_to_uid(zidmap_t *mnt_userns,
static inline gid_t zfs_vfsgid_to_gid(zidmap_t *mnt_userns,
struct user_namespace *fs_userns, gid_t gid)
{
struct user_namespace *owner = idmap_owner(mnt_userns);
struct user_namespace *owner;
#ifdef HAVE_IOPS_CREATE_IDMAP
if (mnt_userns == zfs_init_idmap)
return (gid);
#endif
#ifdef HAVE_IDMAP_NO_USERNS
struct user_namespace ns;
ns.gid_map = mnt_userns->gid_map;
owner = &ns;
#else
owner = idmap_owner(mnt_userns);
#endif
if (zfs_no_idmapping(owner, fs_userns))
return (gid);
gid = from_kgid(owner, KGIDT_INIT(gid));
include/os/linux/spl/sys/types.h
+11
View File
@@ -57,12 +57,23 @@ typedef int minor_t;
struct user_namespace;
#ifdef HAVE_IOPS_CREATE_IDMAP
#include <linux/refcount.h>
#ifdef HAVE_IDMAP_NO_USERNS
#include <linux/user_namespace.h>
struct mnt_idmap {
struct uid_gid_map uid_map;
struct uid_gid_map gid_map;
refcount_t count;
};
typedef struct mnt_idmap zidmap_t;
#define idmap_owner(p) (NULL)
#else
struct mnt_idmap {
struct user_namespace *owner;
refcount_t count;
};
typedef struct mnt_idmap zidmap_t;
#define idmap_owner(p) (((struct mnt_idmap *)p)->owner)
#endif
#else
typedef struct user_namespace zidmap_t;
#define idmap_owner(p) ((struct user_namespace *)p)