[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/fs/nfs/nfs3acl.c b/ap/os/linux/linux-3.4.x/fs/nfs/nfs3acl.c
new file mode 100644
index 0000000..e4498dc
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/fs/nfs/nfs3acl.c
@@ -0,0 +1,440 @@
+#include <linux/fs.h>
+#include <linux/gfp.h>
+#include <linux/nfs.h>
+#include <linux/nfs3.h>
+#include <linux/nfs_fs.h>
+#include <linux/posix_acl_xattr.h>
+#include <linux/nfsacl.h>
+
+#include "internal.h"
+
+#define NFSDBG_FACILITY NFSDBG_PROC
+
+ssize_t nfs3_listxattr(struct dentry *dentry, char *buffer, size_t size)
+{
+ struct inode *inode = dentry->d_inode;
+ struct posix_acl *acl;
+ int pos=0, len=0;
+
+# define output(s) do { \
+ if (pos + sizeof(s) <= size) { \
+ memcpy(buffer + pos, s, sizeof(s)); \
+ pos += sizeof(s); \
+ } \
+ len += sizeof(s); \
+ } while(0)
+
+ acl = nfs3_proc_getacl(inode, ACL_TYPE_ACCESS);
+ if (IS_ERR(acl))
+ return PTR_ERR(acl);
+ if (acl) {
+ output("system.posix_acl_access");
+ posix_acl_release(acl);
+ }
+
+ if (S_ISDIR(inode->i_mode)) {
+ acl = nfs3_proc_getacl(inode, ACL_TYPE_DEFAULT);
+ if (IS_ERR(acl))
+ return PTR_ERR(acl);
+ if (acl) {
+ output("system.posix_acl_default");
+ posix_acl_release(acl);
+ }
+ }
+
+# undef output
+
+ if (!buffer || len <= size)
+ return len;
+ return -ERANGE;
+}
+
+ssize_t nfs3_getxattr(struct dentry *dentry, const char *name,
+ void *buffer, size_t size)
+{
+ struct inode *inode = dentry->d_inode;
+ struct posix_acl *acl;
+ int type, error = 0;
+
+ if (strcmp(name, POSIX_ACL_XATTR_ACCESS) == 0)
+ type = ACL_TYPE_ACCESS;
+ else if (strcmp(name, POSIX_ACL_XATTR_DEFAULT) == 0)
+ type = ACL_TYPE_DEFAULT;
+ else
+ return -EOPNOTSUPP;
+
+ acl = nfs3_proc_getacl(inode, type);
+ if (IS_ERR(acl))
+ return PTR_ERR(acl);
+ else if (acl) {
+ if (type == ACL_TYPE_ACCESS && acl->a_count == 0)
+ error = -ENODATA;
+ else
+ error = posix_acl_to_xattr(acl, buffer, size);
+ posix_acl_release(acl);
+ } else
+ error = -ENODATA;
+
+ return error;
+}
+
+int nfs3_setxattr(struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags)
+{
+ struct inode *inode = dentry->d_inode;
+ struct posix_acl *acl;
+ int type, error;
+
+ if (strcmp(name, POSIX_ACL_XATTR_ACCESS) == 0)
+ type = ACL_TYPE_ACCESS;
+ else if (strcmp(name, POSIX_ACL_XATTR_DEFAULT) == 0)
+ type = ACL_TYPE_DEFAULT;
+ else
+ return -EOPNOTSUPP;
+
+ acl = posix_acl_from_xattr(value, size);
+ if (IS_ERR(acl))
+ return PTR_ERR(acl);
+ error = nfs3_proc_setacl(inode, type, acl);
+ posix_acl_release(acl);
+
+ return error;
+}
+
+int nfs3_removexattr(struct dentry *dentry, const char *name)
+{
+ struct inode *inode = dentry->d_inode;
+ int type;
+
+ if (strcmp(name, POSIX_ACL_XATTR_ACCESS) == 0)
+ type = ACL_TYPE_ACCESS;
+ else if (strcmp(name, POSIX_ACL_XATTR_DEFAULT) == 0)
+ type = ACL_TYPE_DEFAULT;
+ else
+ return -EOPNOTSUPP;
+
+ return nfs3_proc_setacl(inode, type, NULL);
+}
+
+static void __nfs3_forget_cached_acls(struct nfs_inode *nfsi)
+{
+ if (!IS_ERR(nfsi->acl_access)) {
+ posix_acl_release(nfsi->acl_access);
+ nfsi->acl_access = ERR_PTR(-EAGAIN);
+ }
+ if (!IS_ERR(nfsi->acl_default)) {
+ posix_acl_release(nfsi->acl_default);
+ nfsi->acl_default = ERR_PTR(-EAGAIN);
+ }
+}
+
+void nfs3_forget_cached_acls(struct inode *inode)
+{
+ dprintk("NFS: nfs3_forget_cached_acls(%s/%ld)\n", inode->i_sb->s_id,
+ inode->i_ino);
+ spin_lock(&inode->i_lock);
+ __nfs3_forget_cached_acls(NFS_I(inode));
+ spin_unlock(&inode->i_lock);
+}
+
+static struct posix_acl *nfs3_get_cached_acl(struct inode *inode, int type)
+{
+ struct nfs_inode *nfsi = NFS_I(inode);
+ struct posix_acl *acl = ERR_PTR(-EINVAL);
+
+ spin_lock(&inode->i_lock);
+ switch(type) {
+ case ACL_TYPE_ACCESS:
+ acl = nfsi->acl_access;
+ break;
+
+ case ACL_TYPE_DEFAULT:
+ acl = nfsi->acl_default;
+ break;
+
+ default:
+ goto out;
+ }
+ if (IS_ERR(acl))
+ acl = ERR_PTR(-EAGAIN);
+ else
+ acl = posix_acl_dup(acl);
+out:
+ spin_unlock(&inode->i_lock);
+ dprintk("NFS: nfs3_get_cached_acl(%s/%ld, %d) = %p\n", inode->i_sb->s_id,
+ inode->i_ino, type, acl);
+ return acl;
+}
+
+static void nfs3_cache_acls(struct inode *inode, struct posix_acl *acl,
+ struct posix_acl *dfacl)
+{
+ struct nfs_inode *nfsi = NFS_I(inode);
+
+ dprintk("nfs3_cache_acls(%s/%ld, %p, %p)\n", inode->i_sb->s_id,
+ inode->i_ino, acl, dfacl);
+ spin_lock(&inode->i_lock);
+ __nfs3_forget_cached_acls(NFS_I(inode));
+ if (!IS_ERR(acl))
+ nfsi->acl_access = posix_acl_dup(acl);
+ if (!IS_ERR(dfacl))
+ nfsi->acl_default = posix_acl_dup(dfacl);
+ spin_unlock(&inode->i_lock);
+}
+
+struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type)
+{
+ struct nfs_server *server = NFS_SERVER(inode);
+ struct page *pages[NFSACL_MAXPAGES] = { };
+ struct nfs3_getaclargs args = {
+ .fh = NFS_FH(inode),
+ /* The xdr layer may allocate pages here. */
+ .pages = pages,
+ };
+ struct nfs3_getaclres res = {
+ NULL,
+ };
+ struct rpc_message msg = {
+ .rpc_argp = &args,
+ .rpc_resp = &res,
+ };
+ struct posix_acl *acl;
+ int status, count;
+
+ if (!nfs_server_capable(inode, NFS_CAP_ACLS))
+ return ERR_PTR(-EOPNOTSUPP);
+
+ status = nfs_revalidate_inode(server, inode);
+ if (status < 0)
+ return ERR_PTR(status);
+ acl = nfs3_get_cached_acl(inode, type);
+ if (acl != ERR_PTR(-EAGAIN))
+ return acl;
+ acl = NULL;
+
+ /*
+ * Only get the access acl when explicitly requested: We don't
+ * need it for access decisions, and only some applications use
+ * it. Applications which request the access acl first are not
+ * penalized from this optimization.
+ */
+ if (type == ACL_TYPE_ACCESS)
+ args.mask |= NFS_ACLCNT|NFS_ACL;
+ if (S_ISDIR(inode->i_mode))
+ args.mask |= NFS_DFACLCNT|NFS_DFACL;
+ if (args.mask == 0)
+ return NULL;
+
+ dprintk("NFS call getacl\n");
+ msg.rpc_proc = &server->client_acl->cl_procinfo[ACLPROC3_GETACL];
+ res.fattr = nfs_alloc_fattr();
+ if (res.fattr == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ status = rpc_call_sync(server->client_acl, &msg, 0);
+ dprintk("NFS reply getacl: %d\n", status);
+
+ /* pages may have been allocated at the xdr layer. */
+ for (count = 0; count < NFSACL_MAXPAGES && args.pages[count]; count++)
+ __free_page(args.pages[count]);
+
+ switch (status) {
+ case 0:
+ status = nfs_refresh_inode(inode, res.fattr);
+ break;
+ case -EPFNOSUPPORT:
+ case -EPROTONOSUPPORT:
+ dprintk("NFS_V3_ACL extension not supported; disabling\n");
+ server->caps &= ~NFS_CAP_ACLS;
+ case -ENOTSUPP:
+ status = -EOPNOTSUPP;
+ default:
+ goto getout;
+ }
+ if ((args.mask & res.mask) != args.mask) {
+ status = -EIO;
+ goto getout;
+ }
+
+ if (res.acl_access != NULL) {
+ if (posix_acl_equiv_mode(res.acl_access, NULL) == 0) {
+ posix_acl_release(res.acl_access);
+ res.acl_access = NULL;
+ }
+ }
+ nfs3_cache_acls(inode,
+ (res.mask & NFS_ACL) ? res.acl_access : ERR_PTR(-EINVAL),
+ (res.mask & NFS_DFACL) ? res.acl_default : ERR_PTR(-EINVAL));
+
+ switch(type) {
+ case ACL_TYPE_ACCESS:
+ acl = res.acl_access;
+ res.acl_access = NULL;
+ break;
+
+ case ACL_TYPE_DEFAULT:
+ acl = res.acl_default;
+ res.acl_default = NULL;
+ }
+
+getout:
+ posix_acl_release(res.acl_access);
+ posix_acl_release(res.acl_default);
+ nfs_free_fattr(res.fattr);
+
+ if (status != 0) {
+ posix_acl_release(acl);
+ acl = ERR_PTR(status);
+ }
+ return acl;
+}
+
+static int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl,
+ struct posix_acl *dfacl)
+{
+ struct nfs_server *server = NFS_SERVER(inode);
+ struct nfs_fattr *fattr;
+ struct page *pages[NFSACL_MAXPAGES];
+ struct nfs3_setaclargs args = {
+ .inode = inode,
+ .mask = NFS_ACL,
+ .acl_access = acl,
+ .pages = pages,
+ };
+ struct rpc_message msg = {
+ .rpc_argp = &args,
+ .rpc_resp = &fattr,
+ };
+ int status;
+
+ status = -EOPNOTSUPP;
+ if (!nfs_server_capable(inode, NFS_CAP_ACLS))
+ goto out;
+
+ /* We are doing this here because XDR marshalling does not
+ * return any results, it BUGs. */
+ status = -ENOSPC;
+ if (acl != NULL && acl->a_count > NFS_ACL_MAX_ENTRIES)
+ goto out;
+ if (dfacl != NULL && dfacl->a_count > NFS_ACL_MAX_ENTRIES)
+ goto out;
+ if (S_ISDIR(inode->i_mode)) {
+ args.mask |= NFS_DFACL;
+ args.acl_default = dfacl;
+ args.len = nfsacl_size(acl, dfacl);
+ } else
+ args.len = nfsacl_size(acl, NULL);
+
+ if (args.len > NFS_ACL_INLINE_BUFSIZE) {
+ unsigned int npages = 1 + ((args.len - 1) >> PAGE_SHIFT);
+
+ status = -ENOMEM;
+ do {
+ args.pages[args.npages] = alloc_page(GFP_KERNEL);
+ if (args.pages[args.npages] == NULL)
+ goto out_freepages;
+ args.npages++;
+ } while (args.npages < npages);
+ }
+
+ dprintk("NFS call setacl\n");
+ status = -ENOMEM;
+ fattr = nfs_alloc_fattr();
+ if (fattr == NULL)
+ goto out_freepages;
+
+ msg.rpc_proc = &server->client_acl->cl_procinfo[ACLPROC3_SETACL];
+ msg.rpc_resp = fattr;
+ status = rpc_call_sync(server->client_acl, &msg, 0);
+ nfs_access_zap_cache(inode);
+ nfs_zap_acl_cache(inode);
+ dprintk("NFS reply setacl: %d\n", status);
+
+ switch (status) {
+ case 0:
+ status = nfs_refresh_inode(inode, fattr);
+ nfs3_cache_acls(inode, acl, dfacl);
+ break;
+ case -EPFNOSUPPORT:
+ case -EPROTONOSUPPORT:
+ dprintk("NFS_V3_ACL SETACL RPC not supported"
+ "(will not retry)\n");
+ server->caps &= ~NFS_CAP_ACLS;
+ case -ENOTSUPP:
+ status = -EOPNOTSUPP;
+ }
+ nfs_free_fattr(fattr);
+out_freepages:
+ while (args.npages != 0) {
+ args.npages--;
+ __free_page(args.pages[args.npages]);
+ }
+out:
+ return status;
+}
+
+int nfs3_proc_setacl(struct inode *inode, int type, struct posix_acl *acl)
+{
+ struct posix_acl *alloc = NULL, *dfacl = NULL;
+ int status;
+
+ if (S_ISDIR(inode->i_mode)) {
+ switch(type) {
+ case ACL_TYPE_ACCESS:
+ alloc = dfacl = nfs3_proc_getacl(inode,
+ ACL_TYPE_DEFAULT);
+ if (IS_ERR(alloc))
+ goto fail;
+ break;
+
+ case ACL_TYPE_DEFAULT:
+ dfacl = acl;
+ alloc = acl = nfs3_proc_getacl(inode,
+ ACL_TYPE_ACCESS);
+ if (IS_ERR(alloc))
+ goto fail;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+ } else if (type != ACL_TYPE_ACCESS)
+ return -EINVAL;
+
+ if (acl == NULL) {
+ alloc = acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL);
+ if (IS_ERR(alloc))
+ goto fail;
+ }
+ status = nfs3_proc_setacls(inode, acl, dfacl);
+ posix_acl_release(alloc);
+ return status;
+
+fail:
+ return PTR_ERR(alloc);
+}
+
+int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode,
+ umode_t mode)
+{
+ struct posix_acl *dfacl, *acl;
+ int error = 0;
+
+ dfacl = nfs3_proc_getacl(dir, ACL_TYPE_DEFAULT);
+ if (IS_ERR(dfacl)) {
+ error = PTR_ERR(dfacl);
+ return (error == -EOPNOTSUPP) ? 0 : error;
+ }
+ if (!dfacl)
+ return 0;
+ acl = posix_acl_dup(dfacl);
+ error = posix_acl_create(&acl, GFP_KERNEL, &mode);
+ if (error < 0)
+ goto out_release_dfacl;
+ error = nfs3_proc_setacls(inode, acl, S_ISDIR(inode->i_mode) ?
+ dfacl : NULL);
+ posix_acl_release(acl);
+out_release_dfacl:
+ posix_acl_release(dfacl);
+ return error;
+}