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fs/9p: Add xattr callbacks for POSIX ACL

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This patch implement fetching POSIX ACL from the server

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
This commit is contained in:
Aneesh Kumar K.V 2010-09-28 00:27:39 +05:30 committed by Eric Van Hensbergen
parent 85ff872d3f
commit 7a4566b0b8
3 changed files with 47 additions and 0 deletions
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41
fs/9p/acl.c
View file

@ -94,3 +94,44 @@ int v9fs_check_acl(struct inode *inode, int mask)
} }
return -EAGAIN; return -EAGAIN;
} }
static int v9fs_xattr_get_acl(struct dentry *dentry, const char *name,
void *buffer, size_t size, int type)
{
struct posix_acl *acl;
int error;
if (strcmp(name, "") != 0)
return -EINVAL;
acl = v9fs_get_cached_acl(dentry->d_inode, type);
if (IS_ERR(acl))
return PTR_ERR(acl);
if (acl == NULL)
return -ENODATA;
error = posix_acl_to_xattr(acl, buffer, size);
posix_acl_release(acl);
return error;
}
static int v9fs_xattr_set_acl(struct dentry *dentry, const char *name,
const void *value, size_t size,
int flags, int type)
{
return 0;
}
const struct xattr_handler v9fs_xattr_acl_access_handler = {
.prefix = POSIX_ACL_XATTR_ACCESS,
.flags = ACL_TYPE_ACCESS,
.get = v9fs_xattr_get_acl,
.set = v9fs_xattr_set_acl,
};
const struct xattr_handler v9fs_xattr_acl_default_handler = {
.prefix = POSIX_ACL_XATTR_DEFAULT,
.flags = ACL_TYPE_DEFAULT,
.get = v9fs_xattr_get_acl,
.set = v9fs_xattr_set_acl,
};

4
fs/9p/xattr.c
View file

@ -164,5 +164,9 @@ ssize_t v9fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)
const struct xattr_handler *v9fs_xattr_handlers[] = { const struct xattr_handler *v9fs_xattr_handlers[] = {
&v9fs_xattr_user_handler, &v9fs_xattr_user_handler,
#ifdef CONFIG_9P_FS_POSIX_ACL
&v9fs_xattr_acl_access_handler,
&v9fs_xattr_acl_default_handler,
#endif
NULL NULL
}; };

2
fs/9p/xattr.h
View file

@ -20,6 +20,8 @@
extern const struct xattr_handler *v9fs_xattr_handlers[]; extern const struct xattr_handler *v9fs_xattr_handlers[];
extern struct xattr_handler v9fs_xattr_user_handler; extern struct xattr_handler v9fs_xattr_user_handler;
extern const struct xattr_handler v9fs_xattr_acl_access_handler;
extern const struct xattr_handler v9fs_xattr_acl_default_handler;
extern ssize_t v9fs_fid_xattr_get(struct p9_fid *, const char *, extern ssize_t v9fs_fid_xattr_get(struct p9_fid *, const char *,
void *, size_t); void *, size_t);