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Linux 5.12 compat: idmapped mounts

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In Linux 5.12, the filesystem API was modified to support ipmapped
mounts by adding a "struct user_namespace *" parameter to a number
functions and VFS handlers. This change adds the needed autoconf
macros to detect the new interfaces and updates the code appropriately.
This change does not add support for idmapped mounts, instead it
preserves the existing behavior by passing the initial user namespace
where needed.  A subsequent commit will be required to add support
for idmapped mounted.

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Co-authored-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Coleman Kane <ckane@colemankane.org>
Closes #11712
This commit is contained in:
Coleman Kane
2021-03-20 00:00:59 -04:00
committed by GitHub
parent 330c6c0523
commit e2a8296131
22 changed files with 557 additions and 123 deletions
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module/os/linux/zfs/zpl_xattr.c
+2 -2
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@@ -1233,7 +1233,7 @@ __zpl_xattr_acl_set_access(struct inode *ip, const char *name,
if (ITOZSB(ip)->z_acl_type != ZFS_ACLTYPE_POSIX)
return (-EOPNOTSUPP);
if (!inode_owner_or_capable(ip))
if (!zpl_inode_owner_or_capable(kcred->user_ns, ip))
return (-EPERM);
if (value) {
@@ -1273,7 +1273,7 @@ __zpl_xattr_acl_set_default(struct inode *ip, const char *name,
if (ITOZSB(ip)->z_acl_type != ZFS_ACLTYPE_POSIX)
return (-EOPNOTSUPP);
if (!inode_owner_or_capable(ip))
if (!zpl_inode_owner_or_capable(kcred->user_ns, ip))
return (-EPERM);
if (value) {