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lizardfs/utils/linux_fuse_acl.patch at master · yinjiawind/lizardfs · GitHub
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linux_fuse_acl.patch
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diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index c3eb2c4..8272f14 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -10,2 +10,6 @@
+
#include <linux/posix_acl.h>
+
#include <linux/posix_acl_xattr.h>
+
#include <linux/version.h>
+
#include <linux/pagemap.h>
@@ -1736,6 +1740,5 @@
static int fuse_setxattr(struct dentry *entry, const char *name,
-
static ssize_t fuse_getxattr(struct dentry *entry, const char *name,
+
static ssize_t _fuse_getxattr(struct inode *inode, const char *name,
void *value, size_t size)
{
-
struct inode *inode = entry->d_inode;
struct fuse_conn *fc = get_fuse_conn(inode);
@@ -1786,2 +1789,53 @@
static ssize_t fuse_getxattr(struct dentry *entry, const char *name,
+
static ssize_t fuse_getxattr(struct dentry *entry, const char *name,
+
void *value, size_t size) {
+
return _fuse_getxattr(entry->d_inode, name, value, size);
+
}
+
+
static struct posix_acl *fuse_get_acl(struct inode *inode, int type) {
+
struct posix_acl *acl = NULL;
+
char *xattr;
+
int length = 4096;
+
+
struct fuse_conn *fc = get_fuse_conn(inode);
+
// If ACLs are not enabled return empty entry:
+
if (!(fc->flags & FUSE_ACL)) {
+
set_cached_acl(inode, ACL_TYPE_ACCESS, NULL);
+
return ERR_PTR(-EAGAIN);
+
}
+
+
xattr = kmalloc(length, GFP_KERNEL);
+
if (!xattr)
+
return ERR_PTR(-ENOMEM);
+
+
length = _fuse_getxattr(inode, POSIX_ACL_XATTR_ACCESS, xattr, length);
+
if (length == -ERANGE) {
+
kfree(xattr);
+
length = _fuse_getxattr(inode, POSIX_ACL_XATTR_ACCESS, NULL, 0);
+
if (length < 0) {
+
return ERR_PTR(length);
+
}
+
length += 1024; // in case somebody just added more ACLs
+
xattr = kmalloc(length, GFP_KERNEL);
+
if (!xattr)
+
return ERR_PTR(-ENOMEM);
+
length = _fuse_getxattr(inode, POSIX_ACL_XATTR_ACCESS, xattr,
+
length);
+
}
+
+
if (length >= 0) {
+
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 7, 0)
+
acl = posix_acl_from_xattr(&init_user_ns, xattr, length);
+
#else
+
acl = posix_acl_from_xattr(xattr, length);
+
#endif
+
} else if (length == -ENODATA) {
+
acl = NULL;
+
} else {
+
acl = ERR_PTR(length);
+
}
+
kfree(xattr);
+
return acl;
+
}
+
static ssize_t fuse_listxattr(struct dentry *entry, char *list, size_t size)
@@ -1883,2 +1937,3 @@
static const struct inode_operations fuse_dir_inode_operations = {
.getxattr = fuse_getxattr,
+
.get_acl = fuse_get_acl,
.listxattr = fuse_listxattr,
@@ -1904,2 +1959,3 @@
static const struct inode_operations fuse_common_inode_operations = {
.getxattr = fuse_getxattr,
+
.get_acl = fuse_get_acl,
.listxattr = fuse_listxattr,
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index d468643..b72038c 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -448,2 +448,3 @@
enum {
OPT_BLKSIZE,
+
OPT_ACL,
OPT_ERR
@@ -460,2 +461,3 @@
static const match_table_t tokens = {
{OPT_BLKSIZE, "blksize=%u"},
+
{OPT_ACL, "acl"},
{OPT_ERR, NULL}
@@ -533,2 +535,6 @@
static int parse_fuse_opt(char *opt, struct fuse_mount_data *d, int is_bdev)
+
case OPT_ACL:
+
d->flags |= FUSE_ACL;
+
break;
+
default:
@@ -554,2 +560,4 @@
static int fuse_show_options(struct seq_file *m, struct dentry *root)
seq_puts(m, ",default_permissions");
+
if (fc->flags & FUSE_ACL)
+
seq_puts(m, ",acl");
if (fc->flags & FUSE_ALLOW_OTHER)
diff --git a/include/uapi/linux/fuse.h b/include/uapi/linux/fuse.h
index 60bb2f9..38e7c83 100644
--- a/include/uapi/linux/fuse.h
+++ b/include/uapi/linux/fuse.h
@@ -205,2 +205,3 @@
struct fuse_file_lock {
*
+
* FUSE_ACL: access control lists
* FUSE_ASYNC_READ: asynchronous read requests
@@ -222,2 +223,3 @@
struct fuse_file_lock {
*/
+
#define FUSE_ACL (1 << 31)
#define FUSE_ASYNC_READ (1 << 0)
-
-
2.0.0-rc0
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