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xattr functions are now passed flags through struct xattr_handler

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Signed-off-by: Auke Kok <auke.kok@versity.com>
This commit is contained in:
Auke Kok
2023-05-10 14:29:43 -04:00
parent 8a7bc0cdfa
commit f367e485a6
4 changed files with 61 additions and 8 deletions
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9
kmod/src/Makefile.kernelcompat
View File

@@ -149,3 +149,12 @@ endif
ifneq (,$(shell grep 'struct backing_dev_info.*backing_dev_info' include/linux/fs.h))
ccflags-y += -DKC_LINUX_BACKING_DEV_INFO=1
endif
#
# v4.3-9290-ge409de992e3e
#
# xattr handlers are now passed a struct that contains `flags`
#
ifneq (,$(shell grep 'int...get..const struct xattr_handler.*struct dentry.*dentry,' include/linux/xattr.h))
ccflags-y += -DKC_XATTR_STRUCT_XATTR_HANDLER=1
endif

17
kmod/src/acl.c
View File

@@ -218,10 +218,17 @@ int scoutfs_set_acl(struct inode *inode, struct posix_acl *acl, int type)
scoutfs_unlock(sb, lock, SCOUTFS_LOCK_WRITE);
return ret;
}
#ifdef KC_XATTR_STRUCT_XATTR_HANDLER
int scoutfs_acl_get_xattr(const struct xattr_handler *handler, struct dentry *dentry,
struct inode *inode, const char *name, void *value,
size_t size)
{
int type = handler->flags;
#else
int scoutfs_acl_get_xattr(struct dentry *dentry, const char *name, void *value, size_t size,
int type)
{
#endif
struct posix_acl *acl;
int ret = 0;
@@ -240,9 +247,17 @@ int scoutfs_acl_get_xattr(struct dentry *dentry, const char *name, void *value,
return ret;
}
#ifdef KC_XATTR_STRUCT_XATTR_HANDLER
int scoutfs_acl_set_xattr(const struct xattr_handler *handler, struct dentry *dentry,
struct inode *inode, const char *name, const void *value,
size_t size, int flags)
{
int type = handler->flags;
#else
int scoutfs_acl_set_xattr(struct dentry *dentry, const char *name, const void *value, size_t size,
int flags, int type)
{
#endif
struct posix_acl *acl = NULL;
int ret;

9
kmod/src/acl.h
View File

@@ -6,10 +6,19 @@ struct posix_acl *scoutfs_get_acl_locked(struct inode *inode, int type, struct s
int scoutfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
int scoutfs_set_acl_locked(struct inode *inode, struct posix_acl *acl, int type,
struct scoutfs_lock *lock, struct list_head *ind_locks);
#ifdef KC_XATTR_STRUCT_XATTR_HANDLER
int scoutfs_acl_get_xattr(const struct xattr_handler *, struct dentry *dentry,
struct inode *inode, const char *name, void *value,
size_t size);
int scoutfs_acl_set_xattr(const struct xattr_handler *, struct dentry *dentry,
struct inode *inode, const char *name, const void *value,
size_t size, int flags);
#else
int scoutfs_acl_get_xattr(struct dentry *dentry, const char *name, void *value, size_t size,
int type);
int scoutfs_acl_set_xattr(struct dentry *dentry, const char *name, const void *value, size_t size,
int flags, int type);
#endif
int scoutfs_acl_chmod_locked(struct inode *inode, struct iattr *attr,
struct scoutfs_lock *lock, struct list_head *ind_locks);
int scoutfs_init_acl_locked(struct inode *inode, struct inode *dir,

34
kmod/src/xattr.c
View File

@@ -850,6 +850,7 @@ unlock:
return ret;
}
#ifndef KC_XATTR_STRUCT_XATTR_HANDLER
/*
* Future kernels have this amazing hack to rewind the name to get the
* skipped prefix. We're back in the stone ages without the handler
@@ -857,22 +858,41 @@ unlock:
* compat hook to either call the kernel's xattr_full_name(handler), or
* our hack to use the flags as the prefix length.
*/
static const char *full_name_hack(void *handler, const char *name, int len)
static const char *full_name_hack(const char *name, int len)
{
return name - len;
}
#endif
static int scoutfs_xattr_get_handler(struct dentry *dentry, const char *name,
void *value, size_t size, int handler_flags)
static int scoutfs_xattr_get_handler
#ifdef KC_XATTR_STRUCT_XATTR_HANDLER
(const struct xattr_handler *handler, struct dentry *dentry,
struct inode *inode, const char *name, void *value,
size_t size)
{
name = full_name_hack(NULL, name, handler_flags);
name = xattr_full_name(handler, name);
#else
(struct dentry *dentry, const char *name,
void *value, size_t size, int handler_flags)
{
name = full_name_hack(name, handler_flags);
#endif
return scoutfs_xattr_get(dentry, name, value, size);
}
static int scoutfs_xattr_set_handler(struct dentry *dentry, const char *name,
const void *value, size_t size, int flags, int handler_flags)
static int scoutfs_xattr_set_handler
#ifdef KC_XATTR_STRUCT_XATTR_HANDLER
(const struct xattr_handler *handler, struct dentry *dentry,
struct inode *inode, const char *name, const void *value,
size_t size, int flags)
{
name = full_name_hack(NULL, name, handler_flags);
name = xattr_full_name(handler, name);
#else
(struct dentry *dentry, const char *name,
const void *value, size_t size, int flags, int handler_flags)
{
name = full_name_hack(name, handler_flags);
#endif
return scoutfs_xattr_set(dentry, name, value, size, flags);
}