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@@ -5,6 +5,9 @@
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*
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* Copyright (C) 2008 Oracle. All rights reserved.
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*
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+ * CREDITS:
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+ * Lots of code in this file is taken from ext3.
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+ *
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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@@ -21,6 +24,19 @@
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* Boston, MA 021110-1307, USA.
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*/
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+#include <linux/capability.h>
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+#include <linux/fs.h>
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+#include <linux/types.h>
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+#include <linux/slab.h>
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+#include <linux/highmem.h>
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+#include <linux/pagemap.h>
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+#include <linux/uio.h>
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+#include <linux/sched.h>
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+#include <linux/splice.h>
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+#include <linux/mount.h>
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+#include <linux/writeback.h>
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+#include <linux/falloc.h>
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+
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#define MLOG_MASK_PREFIX ML_XATTR
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#include <cluster/masklog.h>
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@@ -28,12 +44,119 @@
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#include "alloc.h"
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#include "dlmglue.h"
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#include "file.h"
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+#include "symlink.h"
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+#include "sysfile.h"
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#include "inode.h"
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#include "journal.h"
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#include "ocfs2_fs.h"
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#include "suballoc.h"
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#include "uptodate.h"
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#include "buffer_head_io.h"
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+#include "xattr.h"
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+
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+
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+struct ocfs2_xattr_def_value_root {
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+ struct ocfs2_xattr_value_root xv;
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+ struct ocfs2_extent_rec er;
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+};
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+
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+#define OCFS2_XATTR_ROOT_SIZE (sizeof(struct ocfs2_xattr_def_value_root))
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+#define OCFS2_XATTR_INLINE_SIZE 80
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+
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+static struct ocfs2_xattr_def_value_root def_xv = {
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+ .xv.xr_list.l_count = cpu_to_le16(1),
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+};
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+
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+struct xattr_handler *ocfs2_xattr_handlers[] = {
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+ &ocfs2_xattr_user_handler,
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+ &ocfs2_xattr_trusted_handler,
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+ NULL
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+};
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+
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+static struct xattr_handler *ocfs2_xattr_handler_map[] = {
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+ [OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler,
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+ [OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler,
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+};
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+
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+struct ocfs2_xattr_info {
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+ int name_index;
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+ const char *name;
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+ const void *value;
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+ size_t value_len;
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+};
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+
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+struct ocfs2_xattr_search {
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+ struct buffer_head *inode_bh;
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+ /*
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+ * xattr_bh point to the block buffer head which has extended attribute
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+ * when extended attribute in inode, xattr_bh is equal to inode_bh.
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+ */
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+ struct buffer_head *xattr_bh;
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+ struct ocfs2_xattr_header *header;
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+ void *base;
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+ void *end;
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+ struct ocfs2_xattr_entry *here;
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+ int not_found;
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+};
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+
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+static inline struct xattr_handler *ocfs2_xattr_handler(int name_index)
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+{
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+ struct xattr_handler *handler = NULL;
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+
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+ if (name_index > 0 && name_index < OCFS2_XATTR_MAX)
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+ handler = ocfs2_xattr_handler_map[name_index];
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+
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+ return handler;
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+}
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+
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+static inline u32 ocfs2_xattr_name_hash(struct inode *inode,
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+ char *prefix,
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+ int prefix_len,
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+ char *name,
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+ int name_len)
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+{
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+ /* Get hash value of uuid from super block */
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+ u32 hash = OCFS2_SB(inode->i_sb)->uuid_hash;
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+ int i;
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+
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+ /* hash extended attribute prefix */
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+ for (i = 0; i < prefix_len; i++) {
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+ hash = (hash << OCFS2_HASH_SHIFT) ^
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+ (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^
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+ *prefix++;
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+ }
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+ /* hash extended attribute name */
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+ for (i = 0; i < name_len; i++) {
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+ hash = (hash << OCFS2_HASH_SHIFT) ^
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+ (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^
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+ *name++;
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+ }
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+
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+ return hash;
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+}
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+
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+/*
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+ * ocfs2_xattr_hash_entry()
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+ *
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+ * Compute the hash of an extended attribute.
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+ */
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+static void ocfs2_xattr_hash_entry(struct inode *inode,
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+ struct ocfs2_xattr_header *header,
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+ struct ocfs2_xattr_entry *entry)
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+{
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+ u32 hash = 0;
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+ struct xattr_handler *handler =
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+ ocfs2_xattr_handler(ocfs2_xattr_get_type(entry));
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+ char *prefix = handler->prefix;
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+ char *name = (char *)header + le16_to_cpu(entry->xe_name_offset);
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+ int prefix_len = strlen(handler->prefix);
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+
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+ hash = ocfs2_xattr_name_hash(inode, prefix, prefix_len, name,
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+ entry->xe_name_len);
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+ entry->xe_name_hash = cpu_to_le32(hash);
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+
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+ return;
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+}
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static int ocfs2_xattr_extend_allocation(struct inode *inode,
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u32 clusters_to_add,
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@@ -303,3 +426,1500 @@ static int ocfs2_xattr_value_truncate(struct inode *inode,
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return ret;
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}
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+
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+static int ocfs2_xattr_list_entries(struct inode *inode,
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+ struct ocfs2_xattr_header *header,
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+ char *buffer, size_t buffer_size)
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+{
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+ size_t rest = buffer_size;
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+ int i;
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+
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+ for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) {
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+ struct ocfs2_xattr_entry *entry = &header->xh_entries[i];
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+ struct xattr_handler *handler =
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+ ocfs2_xattr_handler(ocfs2_xattr_get_type(entry));
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+
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+ if (handler) {
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+ size_t size = handler->list(inode, buffer, rest,
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+ ((char *)header +
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+ le16_to_cpu(entry->xe_name_offset)),
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+ entry->xe_name_len);
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+ if (buffer) {
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+ if (size > rest)
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+ return -ERANGE;
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+ buffer += size;
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+ }
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+ rest -= size;
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+ }
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+ }
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+
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+ return buffer_size - rest;
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+}
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+
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+static int ocfs2_xattr_ibody_list(struct inode *inode,
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+ struct ocfs2_dinode *di,
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+ char *buffer,
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+ size_t buffer_size)
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+{
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+ struct ocfs2_xattr_header *header = NULL;
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+ struct ocfs2_inode_info *oi = OCFS2_I(inode);
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+ int ret = 0;
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+
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+ if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL))
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+ return ret;
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+
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+ header = (struct ocfs2_xattr_header *)
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+ ((void *)di + inode->i_sb->s_blocksize -
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+ le16_to_cpu(di->i_xattr_inline_size));
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+
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+ ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size);
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+
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+ return ret;
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+}
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+
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+static int ocfs2_xattr_block_list(struct inode *inode,
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+ struct ocfs2_dinode *di,
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+ char *buffer,
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+ size_t buffer_size)
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+{
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+ struct buffer_head *blk_bh = NULL;
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+ struct ocfs2_xattr_header *header = NULL;
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+ int ret = 0;
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+
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+ if (!di->i_xattr_loc)
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+ return ret;
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+
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+ ret = ocfs2_read_block(OCFS2_SB(inode->i_sb),
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+ le64_to_cpu(di->i_xattr_loc),
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+ &blk_bh, OCFS2_BH_CACHED, inode);
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+ if (ret < 0) {
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+ mlog_errno(ret);
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+ return ret;
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+ }
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+ /*Verify the signature of xattr block*/
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+ if (memcmp((void *)blk_bh->b_data, OCFS2_XATTR_BLOCK_SIGNATURE,
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+ strlen(OCFS2_XATTR_BLOCK_SIGNATURE))) {
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+ ret = -EFAULT;
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+ goto cleanup;
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+ }
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+
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+ header = &((struct ocfs2_xattr_block *)blk_bh->b_data)->
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+ xb_attrs.xb_header;
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+
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+ ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size);
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+cleanup:
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+ brelse(blk_bh);
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+
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+ return ret;
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+}
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+
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+ssize_t ocfs2_listxattr(struct dentry *dentry,
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+ char *buffer,
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+ size_t size)
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+{
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+ int ret = 0, i_ret = 0, b_ret = 0;
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+ struct buffer_head *di_bh = NULL;
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+ struct ocfs2_dinode *di = NULL;
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+ struct ocfs2_inode_info *oi = OCFS2_I(dentry->d_inode);
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+
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+ if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
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+ return ret;
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+
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+ ret = ocfs2_inode_lock(dentry->d_inode, &di_bh, 0);
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+ if (ret < 0) {
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+ mlog_errno(ret);
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+ return ret;
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+ }
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+
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+ di = (struct ocfs2_dinode *)di_bh->b_data;
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+
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+ down_read(&oi->ip_xattr_sem);
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+ i_ret = ocfs2_xattr_ibody_list(dentry->d_inode, di, buffer, size);
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+ if (i_ret < 0)
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+ b_ret = 0;
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+ else {
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+ if (buffer) {
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+ buffer += i_ret;
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+ size -= i_ret;
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+ }
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+ b_ret = ocfs2_xattr_block_list(dentry->d_inode, di,
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+ buffer, size);
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+ if (b_ret < 0)
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+ i_ret = 0;
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+ }
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+ up_read(&oi->ip_xattr_sem);
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+ ocfs2_inode_unlock(dentry->d_inode, 0);
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+
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+ brelse(di_bh);
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+
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+ return i_ret + b_ret;
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+}
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+
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+static int ocfs2_xattr_find_entry(int name_index,
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+ const char *name,
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+ struct ocfs2_xattr_search *xs)
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+{
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+ struct ocfs2_xattr_entry *entry;
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+ size_t name_len;
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+ int i, cmp = 1;
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+
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+ if (name == NULL)
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+ return -EINVAL;
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+
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+ name_len = strlen(name);
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+ entry = xs->here;
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+ for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) {
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+ cmp = name_index - ocfs2_xattr_get_type(entry);
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+ if (!cmp)
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+ cmp = name_len - entry->xe_name_len;
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+ if (!cmp)
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+ cmp = memcmp(name, (xs->base +
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+ le16_to_cpu(entry->xe_name_offset)),
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+ name_len);
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+ if (cmp == 0)
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+ break;
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+ entry += 1;
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+ }
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+ xs->here = entry;
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+
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+ return cmp ? -ENODATA : 0;
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+}
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+
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+static int ocfs2_xattr_get_value_outside(struct inode *inode,
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+ struct ocfs2_xattr_search *xs,
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+ void *buffer,
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+ size_t len)
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+{
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+ u32 cpos, p_cluster, num_clusters, bpc, clusters;
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+ u64 blkno;
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+ int i, ret = 0;
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+ size_t cplen, blocksize;
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+ struct buffer_head *bh = NULL;
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+ struct ocfs2_xattr_value_root *xv;
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+ struct ocfs2_extent_list *el;
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+
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+ xv = (struct ocfs2_xattr_value_root *)
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+ (xs->base + le16_to_cpu(xs->here->xe_name_offset) +
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+ OCFS2_XATTR_SIZE(xs->here->xe_name_len));
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+ el = &xv->xr_list;
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+ clusters = le32_to_cpu(xv->xr_clusters);
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+ bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
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+ blocksize = inode->i_sb->s_blocksize;
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+
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+ cpos = 0;
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+ while (cpos < clusters) {
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+ ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster,
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+ &num_clusters, el);
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+ if (ret) {
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+ mlog_errno(ret);
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+ goto out;
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+ }
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+
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+ blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster);
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+ /* Copy ocfs2_xattr_value */
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+ for (i = 0; i < num_clusters * bpc; i++, blkno++) {
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+ ret = ocfs2_read_block(OCFS2_SB(inode->i_sb), blkno,
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+ &bh, OCFS2_BH_CACHED, inode);
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+ if (ret) {
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+ mlog_errno(ret);
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+ goto out;
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+ }
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+
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+ cplen = len >= blocksize ? blocksize : len;
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+ memcpy(buffer, bh->b_data, cplen);
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+ len -= cplen;
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+ buffer += cplen;
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+
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+ brelse(bh);
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+ bh = NULL;
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+ if (len == 0)
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+ break;
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+ }
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+ cpos += num_clusters;
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+ }
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+out:
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+ return ret;
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+}
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+
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+static int ocfs2_xattr_ibody_get(struct inode *inode,
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+ int name_index,
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+ const char *name,
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+ void *buffer,
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+ size_t buffer_size,
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+ struct ocfs2_xattr_search *xs)
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+{
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+ struct ocfs2_inode_info *oi = OCFS2_I(inode);
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+ struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
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+ size_t size;
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+ int ret = 0;
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+
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+ if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL))
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+ return -ENODATA;
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+
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+ xs->end = (void *)di + inode->i_sb->s_blocksize;
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+ xs->header = (struct ocfs2_xattr_header *)
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+ (xs->end - le16_to_cpu(di->i_xattr_inline_size));
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+ xs->base = (void *)xs->header;
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+ xs->here = xs->header->xh_entries;
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+
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+ ret = ocfs2_xattr_find_entry(name_index, name, xs);
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+ if (ret)
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+ return ret;
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+ size = le64_to_cpu(xs->here->xe_value_size);
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+ if (buffer) {
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+ if (size > buffer_size)
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+ return -ERANGE;
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+ if (ocfs2_xattr_is_local(xs->here)) {
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+ memcpy(buffer, (void *)xs->base +
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+ le16_to_cpu(xs->here->xe_name_offset) +
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+ OCFS2_XATTR_SIZE(xs->here->xe_name_len), size);
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+ } else {
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+ ret = ocfs2_xattr_get_value_outside(inode, xs,
|
|
|
+ buffer, size);
|
|
|
+ if (ret < 0) {
|
|
|
+ mlog_errno(ret);
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ return size;
|
|
|
+}
|
|
|
+
|
|
|
+static int ocfs2_xattr_block_get(struct inode *inode,
|
|
|
+ int name_index,
|
|
|
+ const char *name,
|
|
|
+ void *buffer,
|
|
|
+ size_t buffer_size,
|
|
|
+ struct ocfs2_xattr_search *xs)
|
|
|
+{
|
|
|
+ struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
|
|
|
+ struct buffer_head *blk_bh = NULL;
|
|
|
+ struct ocfs2_xattr_block *xb;
|
|
|
+ size_t size;
|
|
|
+ int ret = -ENODATA;
|
|
|
+
|
|
|
+ if (!di->i_xattr_loc)
|
|
|
+ return ret;
|
|
|
+
|
|
|
+ ret = ocfs2_read_block(OCFS2_SB(inode->i_sb),
|
|
|
+ le64_to_cpu(di->i_xattr_loc),
|
|
|
+ &blk_bh, OCFS2_BH_CACHED, inode);
|
|
|
+ if (ret < 0) {
|
|
|
+ mlog_errno(ret);
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+ /*Verify the signature of xattr block*/
|
|
|
+ if (memcmp((void *)blk_bh->b_data, OCFS2_XATTR_BLOCK_SIGNATURE,
|
|
|
+ strlen(OCFS2_XATTR_BLOCK_SIGNATURE))) {
|
|
|
+ ret = -EFAULT;
|
|
|
+ goto cleanup;
|
|
|
+ }
|
|
|
+
|
|
|
+ xs->xattr_bh = blk_bh;
|
|
|
+ xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
|
|
|
+ xs->header = &xb->xb_attrs.xb_header;
|
|
|
+ xs->base = (void *)xs->header;
|
|
|
+ xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size;
|
|
|
+ xs->here = xs->header->xh_entries;
|
|
|
+
|
|
|
+ ret = ocfs2_xattr_find_entry(name_index, name, xs);
|
|
|
+ if (ret)
|
|
|
+ goto cleanup;
|
|
|
+ size = le64_to_cpu(xs->here->xe_value_size);
|
|
|
+ if (buffer) {
|
|
|
+ ret = -ERANGE;
|
|
|
+ if (size > buffer_size)
|
|
|
+ goto cleanup;
|
|
|
+ if (ocfs2_xattr_is_local(xs->here)) {
|
|
|
+ memcpy(buffer, (void *)xs->base +
|
|
|
+ le16_to_cpu(xs->here->xe_name_offset) +
|
|
|
+ OCFS2_XATTR_SIZE(xs->here->xe_name_len), size);
|
|
|
+ } else {
|
|
|
+ ret = ocfs2_xattr_get_value_outside(inode, xs,
|
|
|
+ buffer, size);
|
|
|
+ if (ret < 0) {
|
|
|
+ mlog_errno(ret);
|
|
|
+ goto cleanup;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+ ret = size;
|
|
|
+cleanup:
|
|
|
+ brelse(blk_bh);
|
|
|
+
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+/* ocfs2_xattr_get()
|
|
|
+ *
|
|
|
+ * Copy an extended attribute into the buffer provided.
|
|
|
+ * Buffer is NULL to compute the size of buffer required.
|
|
|
+ */
|
|
|
+int ocfs2_xattr_get(struct inode *inode,
|
|
|
+ int name_index,
|
|
|
+ const char *name,
|
|
|
+ void *buffer,
|
|
|
+ size_t buffer_size)
|
|
|
+{
|
|
|
+ int ret;
|
|
|
+ struct ocfs2_dinode *di = NULL;
|
|
|
+ struct buffer_head *di_bh = NULL;
|
|
|
+ struct ocfs2_inode_info *oi = OCFS2_I(inode);
|
|
|
+ struct ocfs2_xattr_search xis = {
|
|
|
+ .not_found = -ENODATA,
|
|
|
+ };
|
|
|
+ struct ocfs2_xattr_search xbs = {
|
|
|
+ .not_found = -ENODATA,
|
|
|
+ };
|
|
|
+
|
|
|
+ if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
|
|
|
+ ret = -ENODATA;
|
|
|
+
|
|
|
+ ret = ocfs2_inode_lock(inode, &di_bh, 0);
|
|
|
+ if (ret < 0) {
|
|
|
+ mlog_errno(ret);
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+ xis.inode_bh = xbs.inode_bh = di_bh;
|
|
|
+ di = (struct ocfs2_dinode *)di_bh->b_data;
|
|
|
+
|
|
|
+ down_read(&oi->ip_xattr_sem);
|
|
|
+ ret = ocfs2_xattr_ibody_get(inode, name_index, name, buffer,
|
|
|
+ buffer_size, &xis);
|
|
|
+ if (ret == -ENODATA)
|
|
|
+ ret = ocfs2_xattr_block_get(inode, name_index, name, buffer,
|
|
|
+ buffer_size, &xbs);
|
|
|
+ up_read(&oi->ip_xattr_sem);
|
|
|
+ ocfs2_inode_unlock(inode, 0);
|
|
|
+
|
|
|
+ brelse(di_bh);
|
|
|
+
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+static int __ocfs2_xattr_set_value_outside(struct inode *inode,
|
|
|
+ struct ocfs2_xattr_value_root *xv,
|
|
|
+ const void *value,
|
|
|
+ int value_len)
|
|
|
+{
|
|
|
+ int ret = 0, i, cp_len, credits;
|
|
|
+ u16 blocksize = inode->i_sb->s_blocksize;
|
|
|
+ u32 p_cluster, num_clusters;
|
|
|
+ u32 cpos = 0, bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
|
|
|
+ u32 clusters = ocfs2_clusters_for_bytes(inode->i_sb, value_len);
|
|
|
+ u64 blkno;
|
|
|
+ struct buffer_head *bh = NULL;
|
|
|
+ handle_t *handle;
|
|
|
+
|
|
|
+ BUG_ON(clusters > le32_to_cpu(xv->xr_clusters));
|
|
|
+
|
|
|
+ credits = clusters * bpc;
|
|
|
+ handle = ocfs2_start_trans(OCFS2_SB(inode->i_sb), credits);
|
|
|
+ if (IS_ERR(handle)) {
|
|
|
+ ret = PTR_ERR(handle);
|
|
|
+ mlog_errno(ret);
|
|
|
+ goto out;
|
|
|
+ }
|
|
|
+
|
|
|
+ while (cpos < clusters) {
|
|
|
+ ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster,
|
|
|
+ &num_clusters, &xv->xr_list);
|
|
|
+ if (ret) {
|
|
|
+ mlog_errno(ret);
|
|
|
+ goto out_commit;
|
|
|
+ }
|
|
|
+
|
|
|
+ blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster);
|
|
|
+
|
|
|
+ for (i = 0; i < num_clusters * bpc; i++, blkno++) {
|
|
|
+ ret = ocfs2_read_block(OCFS2_SB(inode->i_sb), blkno,
|
|
|
+ &bh, OCFS2_BH_CACHED, inode);
|
|
|
+ if (ret) {
|
|
|
+ mlog_errno(ret);
|
|
|
+ goto out_commit;
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = ocfs2_journal_access(handle,
|
|
|
+ inode,
|
|
|
+ bh,
|
|
|
+ OCFS2_JOURNAL_ACCESS_WRITE);
|
|
|
+ if (ret < 0) {
|
|
|
+ mlog_errno(ret);
|
|
|
+ goto out_commit;
|
|
|
+ }
|
|
|
+
|
|
|
+ cp_len = value_len > blocksize ? blocksize : value_len;
|
|
|
+ memcpy(bh->b_data, value, cp_len);
|
|
|
+ value_len -= cp_len;
|
|
|
+ value += cp_len;
|
|
|
+ if (cp_len < blocksize)
|
|
|
+ memset(bh->b_data + cp_len, 0,
|
|
|
+ blocksize - cp_len);
|
|
|
+
|
|
|
+ ret = ocfs2_journal_dirty(handle, bh);
|
|
|
+ if (ret < 0) {
|
|
|
+ mlog_errno(ret);
|
|
|
+ goto out_commit;
|
|
|
+ }
|
|
|
+ brelse(bh);
|
|
|
+ bh = NULL;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * XXX: do we need to empty all the following
|
|
|
+ * blocks in this cluster?
|
|
|
+ */
|
|
|
+ if (!value_len)
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ cpos += num_clusters;
|
|
|
+ }
|
|
|
+out_commit:
|
|
|
+ ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
|
|
|
+out:
|
|
|
+ brelse(bh);
|
|
|
+
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+static int ocfs2_xattr_cleanup(struct inode *inode,
|
|
|
+ struct ocfs2_xattr_info *xi,
|
|
|
+ struct ocfs2_xattr_search *xs,
|
|
|
+ size_t offs)
|
|
|
+{
|
|
|
+ handle_t *handle = NULL;
|
|
|
+ int ret = 0;
|
|
|
+ size_t name_len = strlen(xi->name);
|
|
|
+ void *val = xs->base + offs;
|
|
|
+ size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE;
|
|
|
+
|
|
|
+ handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)),
|
|
|
+ OCFS2_XATTR_BLOCK_UPDATE_CREDITS);
|
|
|
+ if (IS_ERR(handle)) {
|
|
|
+ ret = PTR_ERR(handle);
|
|
|
+ mlog_errno(ret);
|
|
|
+ goto out;
|
|
|
+ }
|
|
|
+ ret = ocfs2_journal_access(handle, inode, xs->xattr_bh,
|
|
|
+ OCFS2_JOURNAL_ACCESS_WRITE);
|
|
|
+ if (ret) {
|
|
|
+ mlog_errno(ret);
|
|
|
+ goto out_commit;
|
|
|
+ }
|
|
|
+ /* Decrease xattr count */
|
|
|
+ le16_add_cpu(&xs->header->xh_count, -1);
|
|
|
+ /* Remove the xattr entry and tree root which has already be set*/
|
|
|
+ memset((void *)xs->here, 0, sizeof(struct ocfs2_xattr_entry));
|
|
|
+ memset(val, 0, size);
|
|
|
+
|
|
|
+ ret = ocfs2_journal_dirty(handle, xs->xattr_bh);
|
|
|
+ if (ret < 0)
|
|
|
+ mlog_errno(ret);
|
|
|
+out_commit:
|
|
|
+ ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
|
|
|
+out:
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+static int ocfs2_xattr_update_entry(struct inode *inode,
|
|
|
+ struct ocfs2_xattr_info *xi,
|
|
|
+ struct ocfs2_xattr_search *xs,
|
|
|
+ size_t offs)
|
|
|
+{
|
|
|
+ handle_t *handle = NULL;
|
|
|
+ int ret = 0;
|
|
|
+
|
|
|
+ handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)),
|
|
|
+ OCFS2_XATTR_BLOCK_UPDATE_CREDITS);
|
|
|
+ if (IS_ERR(handle)) {
|
|
|
+ ret = PTR_ERR(handle);
|
|
|
+ mlog_errno(ret);
|
|
|
+ goto out;
|
|
|
+ }
|
|
|
+ ret = ocfs2_journal_access(handle, inode, xs->xattr_bh,
|
|
|
+ OCFS2_JOURNAL_ACCESS_WRITE);
|
|
|
+ if (ret) {
|
|
|
+ mlog_errno(ret);
|
|
|
+ goto out_commit;
|
|
|
+ }
|
|
|
+
|
|
|
+ xs->here->xe_name_offset = cpu_to_le16(offs);
|
|
|
+ xs->here->xe_value_size = cpu_to_le64(xi->value_len);
|
|
|
+ if (xi->value_len <= OCFS2_XATTR_INLINE_SIZE)
|
|
|
+ ocfs2_xattr_set_local(xs->here, 1);
|
|
|
+ else
|
|
|
+ ocfs2_xattr_set_local(xs->here, 0);
|
|
|
+ ocfs2_xattr_hash_entry(inode, xs->header, xs->here);
|
|
|
+
|
|
|
+ ret = ocfs2_journal_dirty(handle, xs->xattr_bh);
|
|
|
+ if (ret < 0)
|
|
|
+ mlog_errno(ret);
|
|
|
+out_commit:
|
|
|
+ ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
|
|
|
+out:
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * ocfs2_xattr_set_value_outside()
|
|
|
+ *
|
|
|
+ * Set large size value in B tree.
|
|
|
+ */
|
|
|
+static int ocfs2_xattr_set_value_outside(struct inode *inode,
|
|
|
+ struct ocfs2_xattr_info *xi,
|
|
|
+ struct ocfs2_xattr_search *xs,
|
|
|
+ size_t offs)
|
|
|
+{
|
|
|
+ size_t name_len = strlen(xi->name);
|
|
|
+ void *val = xs->base + offs;
|
|
|
+ struct ocfs2_xattr_value_root *xv = NULL;
|
|
|
+ size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE;
|
|
|
+ int ret = 0;
|
|
|
+
|
|
|
+ memset(val, 0, size);
|
|
|
+ memcpy(val, xi->name, name_len);
|
|
|
+ xv = (struct ocfs2_xattr_value_root *)
|
|
|
+ (val + OCFS2_XATTR_SIZE(name_len));
|
|
|
+ xv->xr_clusters = 0;
|
|
|
+ xv->xr_last_eb_blk = 0;
|
|
|
+ xv->xr_list.l_tree_depth = 0;
|
|
|
+ xv->xr_list.l_count = cpu_to_le16(1);
|
|
|
+ xv->xr_list.l_next_free_rec = 0;
|
|
|
+
|
|
|
+ ret = ocfs2_xattr_value_truncate(inode, xs->xattr_bh, xv,
|
|
|
+ xi->value_len);
|
|
|
+ if (ret < 0) {
|
|
|
+ mlog_errno(ret);
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+ ret = __ocfs2_xattr_set_value_outside(inode, xv, xi->value,
|
|
|
+ xi->value_len);
|
|
|
+ if (ret < 0) {
|
|
|
+ mlog_errno(ret);
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+ ret = ocfs2_xattr_update_entry(inode, xi, xs, offs);
|
|
|
+ if (ret < 0)
|
|
|
+ mlog_errno(ret);
|
|
|
+
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * ocfs2_xattr_set_entry_local()
|
|
|
+ *
|
|
|
+ * Set, replace or remove extended attribute in local.
|
|
|
+ */
|
|
|
+static void ocfs2_xattr_set_entry_local(struct inode *inode,
|
|
|
+ struct ocfs2_xattr_info *xi,
|
|
|
+ struct ocfs2_xattr_search *xs,
|
|
|
+ struct ocfs2_xattr_entry *last,
|
|
|
+ size_t min_offs)
|
|
|
+{
|
|
|
+ size_t name_len = strlen(xi->name);
|
|
|
+ int i;
|
|
|
+
|
|
|
+ if (xi->value && xs->not_found) {
|
|
|
+ /* Insert the new xattr entry. */
|
|
|
+ le16_add_cpu(&xs->header->xh_count, 1);
|
|
|
+ ocfs2_xattr_set_type(last, xi->name_index);
|
|
|
+ ocfs2_xattr_set_local(last, 1);
|
|
|
+ last->xe_name_len = name_len;
|
|
|
+ } else {
|
|
|
+ void *first_val;
|
|
|
+ void *val;
|
|
|
+ size_t offs, size;
|
|
|
+
|
|
|
+ first_val = xs->base + min_offs;
|
|
|
+ offs = le16_to_cpu(xs->here->xe_name_offset);
|
|
|
+ val = xs->base + offs;
|
|
|
+
|
|
|
+ if (le64_to_cpu(xs->here->xe_value_size) >
|
|
|
+ OCFS2_XATTR_INLINE_SIZE)
|
|
|
+ size = OCFS2_XATTR_SIZE(name_len) +
|
|
|
+ OCFS2_XATTR_ROOT_SIZE;
|
|
|
+ else
|
|
|
+ size = OCFS2_XATTR_SIZE(name_len) +
|
|
|
+ OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size));
|
|
|
+
|
|
|
+ if (xi->value && size == OCFS2_XATTR_SIZE(name_len) +
|
|
|
+ OCFS2_XATTR_SIZE(xi->value_len)) {
|
|
|
+ /* The old and the new value have the
|
|
|
+ same size. Just replace the value. */
|
|
|
+ ocfs2_xattr_set_local(xs->here, 1);
|
|
|
+ xs->here->xe_value_size = cpu_to_le64(xi->value_len);
|
|
|
+ /* Clear value bytes. */
|
|
|
+ memset(val + OCFS2_XATTR_SIZE(name_len),
|
|
|
+ 0,
|
|
|
+ OCFS2_XATTR_SIZE(xi->value_len));
|
|
|
+ memcpy(val + OCFS2_XATTR_SIZE(name_len),
|
|
|
+ xi->value,
|
|
|
+ xi->value_len);
|
|
|
+ return;
|
|
|
+ }
|
|
|
+ /* Remove the old name+value. */
|
|
|
+ memmove(first_val + size, first_val, val - first_val);
|
|
|
+ memset(first_val, 0, size);
|
|
|
+ xs->here->xe_name_hash = 0;
|
|
|
+ xs->here->xe_name_offset = 0;
|
|
|
+ ocfs2_xattr_set_local(xs->here, 1);
|
|
|
+ xs->here->xe_value_size = 0;
|
|
|
+
|
|
|
+ min_offs += size;
|
|
|
+
|
|
|
+ /* Adjust all value offsets. */
|
|
|
+ last = xs->header->xh_entries;
|
|
|
+ for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) {
|
|
|
+ size_t o = le16_to_cpu(last->xe_name_offset);
|
|
|
+
|
|
|
+ if (o < offs)
|
|
|
+ last->xe_name_offset = cpu_to_le16(o + size);
|
|
|
+ last += 1;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (!xi->value) {
|
|
|
+ /* Remove the old entry. */
|
|
|
+ last -= 1;
|
|
|
+ memmove(xs->here, xs->here + 1,
|
|
|
+ (void *)last - (void *)xs->here);
|
|
|
+ memset(last, 0, sizeof(struct ocfs2_xattr_entry));
|
|
|
+ le16_add_cpu(&xs->header->xh_count, -1);
|
|
|
+ }
|
|
|
+ }
|
|
|
+ if (xi->value) {
|
|
|
+ /* Insert the new name+value. */
|
|
|
+ size_t size = OCFS2_XATTR_SIZE(name_len) +
|
|
|
+ OCFS2_XATTR_SIZE(xi->value_len);
|
|
|
+ void *val = xs->base + min_offs - size;
|
|
|
+
|
|
|
+ xs->here->xe_name_offset = cpu_to_le16(min_offs - size);
|
|
|
+ memset(val, 0, size);
|
|
|
+ memcpy(val, xi->name, name_len);
|
|
|
+ memcpy(val + OCFS2_XATTR_SIZE(name_len),
|
|
|
+ xi->value,
|
|
|
+ xi->value_len);
|
|
|
+ xs->here->xe_value_size = cpu_to_le64(xi->value_len);
|
|
|
+ ocfs2_xattr_set_local(xs->here, 1);
|
|
|
+ ocfs2_xattr_hash_entry(inode, xs->header, xs->here);
|
|
|
+ }
|
|
|
+
|
|
|
+ return;
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * ocfs2_xattr_set_entry()
|
|
|
+ *
|
|
|
+ * Set extended attribute entry into inode or block.
|
|
|
+ *
|
|
|
+ * If extended attribute value size > OCFS2_XATTR_INLINE_SIZE,
|
|
|
+ * We first insert tree root(ocfs2_xattr_value_root) with set_entry_local(),
|
|
|
+ * then set value in B tree with set_value_outside().
|
|
|
+ */
|
|
|
+static int ocfs2_xattr_set_entry(struct inode *inode,
|
|
|
+ struct ocfs2_xattr_info *xi,
|
|
|
+ struct ocfs2_xattr_search *xs,
|
|
|
+ int flag)
|
|
|
+{
|
|
|
+ struct ocfs2_xattr_entry *last;
|
|
|
+ struct ocfs2_inode_info *oi = OCFS2_I(inode);
|
|
|
+ struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
|
|
|
+ size_t min_offs = xs->end - xs->base, name_len = strlen(xi->name);
|
|
|
+ size_t size_l = 0;
|
|
|
+ handle_t *handle = NULL;
|
|
|
+ int free, i, ret;
|
|
|
+ struct ocfs2_xattr_info xi_l = {
|
|
|
+ .name_index = xi->name_index,
|
|
|
+ .name = xi->name,
|
|
|
+ .value = xi->value,
|
|
|
+ .value_len = xi->value_len,
|
|
|
+ };
|
|
|
+
|
|
|
+ /* Compute min_offs, last and free space. */
|
|
|
+ last = xs->header->xh_entries;
|
|
|
+
|
|
|
+ for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) {
|
|
|
+ size_t offs = le16_to_cpu(last->xe_name_offset);
|
|
|
+ if (offs < min_offs)
|
|
|
+ min_offs = offs;
|
|
|
+ last += 1;
|
|
|
+ }
|
|
|
+
|
|
|
+ free = min_offs - ((void *)last - xs->base) - sizeof(__u32);
|
|
|
+ if (free < 0)
|
|
|
+ return -EFAULT;
|
|
|
+
|
|
|
+ if (!xs->not_found) {
|
|
|
+ size_t size = 0;
|
|
|
+ if (ocfs2_xattr_is_local(xs->here))
|
|
|
+ size = OCFS2_XATTR_SIZE(name_len) +
|
|
|
+ OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size));
|
|
|
+ else
|
|
|
+ size = OCFS2_XATTR_SIZE(name_len) +
|
|
|
+ OCFS2_XATTR_ROOT_SIZE;
|
|
|
+ free += (size + sizeof(struct ocfs2_xattr_entry));
|
|
|
+ }
|
|
|
+ /* Check free space in inode or block */
|
|
|
+ if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
|
|
|
+ if (free < sizeof(struct ocfs2_xattr_entry) +
|
|
|
+ OCFS2_XATTR_SIZE(name_len) +
|
|
|
+ OCFS2_XATTR_ROOT_SIZE) {
|
|
|
+ ret = -ENOSPC;
|
|
|
+ goto out;
|
|
|
+ }
|
|
|
+ size_l = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE;
|
|
|
+ xi_l.value = (void *)&def_xv;
|
|
|
+ xi_l.value_len = OCFS2_XATTR_ROOT_SIZE;
|
|
|
+ } else if (xi->value) {
|
|
|
+ if (free < sizeof(struct ocfs2_xattr_entry) +
|
|
|
+ OCFS2_XATTR_SIZE(name_len) +
|
|
|
+ OCFS2_XATTR_SIZE(xi->value_len)) {
|
|
|
+ ret = -ENOSPC;
|
|
|
+ goto out;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ if (!xs->not_found) {
|
|
|
+ /* For existing extended attribute */
|
|
|
+ size_t size = OCFS2_XATTR_SIZE(name_len) +
|
|
|
+ OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size));
|
|
|
+ size_t offs = le16_to_cpu(xs->here->xe_name_offset);
|
|
|
+ void *val = xs->base + offs;
|
|
|
+
|
|
|
+ if (ocfs2_xattr_is_local(xs->here) && size == size_l) {
|
|
|
+ /* Replace existing local xattr with tree root */
|
|
|
+ ret = ocfs2_xattr_set_value_outside(inode, xi, xs,
|
|
|
+ offs);
|
|
|
+ if (ret < 0)
|
|
|
+ mlog_errno(ret);
|
|
|
+ goto out;
|
|
|
+ } else if (!ocfs2_xattr_is_local(xs->here)) {
|
|
|
+ /* For existing xattr which has value outside */
|
|
|
+ struct ocfs2_xattr_value_root *xv = NULL;
|
|
|
+ xv = (struct ocfs2_xattr_value_root *)(val +
|
|
|
+ OCFS2_XATTR_SIZE(name_len));
|
|
|
+
|
|
|
+ if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
|
|
|
+ /*
|
|
|
+ * If new value need set outside also,
|
|
|
+ * first truncate old value to new value,
|
|
|
+ * then set new value with set_value_outside().
|
|
|
+ */
|
|
|
+ ret = ocfs2_xattr_value_truncate(inode,
|
|
|
+ xs->xattr_bh,
|
|
|
+ xv,
|
|
|
+ xi->value_len);
|
|
|
+ if (ret < 0) {
|
|
|
+ mlog_errno(ret);
|
|
|
+ goto out;
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = __ocfs2_xattr_set_value_outside(inode,
|
|
|
+ xv,
|
|
|
+ xi->value,
|
|
|
+ xi->value_len);
|
|
|
+ if (ret < 0) {
|
|
|
+ mlog_errno(ret);
|
|
|
+ goto out;
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = ocfs2_xattr_update_entry(inode,
|
|
|
+ xi,
|
|
|
+ xs,
|
|
|
+ offs);
|
|
|
+ if (ret < 0)
|
|
|
+ mlog_errno(ret);
|
|
|
+ goto out;
|
|
|
+ } else {
|
|
|
+ /*
|
|
|
+ * If new value need set in local,
|
|
|
+ * just trucate old value to zero.
|
|
|
+ */
|
|
|
+ ret = ocfs2_xattr_value_truncate(inode,
|
|
|
+ xs->xattr_bh,
|
|
|
+ xv,
|
|
|
+ 0);
|
|
|
+ if (ret < 0)
|
|
|
+ mlog_errno(ret);
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)),
|
|
|
+ OCFS2_INODE_UPDATE_CREDITS);
|
|
|
+ if (IS_ERR(handle)) {
|
|
|
+ ret = PTR_ERR(handle);
|
|
|
+ mlog_errno(ret);
|
|
|
+ goto out;
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = ocfs2_journal_access(handle, inode, xs->inode_bh,
|
|
|
+ OCFS2_JOURNAL_ACCESS_WRITE);
|
|
|
+ if (ret) {
|
|
|
+ mlog_errno(ret);
|
|
|
+ goto out_commit;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (!(flag & OCFS2_INLINE_XATTR_FL)) {
|
|
|
+ /*set extended attribue in external blcok*/
|
|
|
+ ret = ocfs2_extend_trans(handle,
|
|
|
+ OCFS2_XATTR_BLOCK_UPDATE_CREDITS);
|
|
|
+ if (ret) {
|
|
|
+ mlog_errno(ret);
|
|
|
+ goto out_commit;
|
|
|
+ }
|
|
|
+ ret = ocfs2_journal_access(handle, inode, xs->xattr_bh,
|
|
|
+ OCFS2_JOURNAL_ACCESS_WRITE);
|
|
|
+ if (ret) {
|
|
|
+ mlog_errno(ret);
|
|
|
+ goto out_commit;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Set value in local, include set tree root in local.
|
|
|
+ * This is the first step for value size >INLINE_SIZE.
|
|
|
+ */
|
|
|
+ ocfs2_xattr_set_entry_local(inode, &xi_l, xs, last, min_offs);
|
|
|
+
|
|
|
+ if (!(flag & OCFS2_INLINE_XATTR_FL)) {
|
|
|
+ ret = ocfs2_journal_dirty(handle, xs->xattr_bh);
|
|
|
+ if (ret < 0) {
|
|
|
+ mlog_errno(ret);
|
|
|
+ goto out_commit;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) &&
|
|
|
+ (flag & OCFS2_INLINE_XATTR_FL)) {
|
|
|
+ struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
|
+ unsigned int xattrsize = osb->s_xattr_inline_size;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Adjust extent record count or inline data size
|
|
|
+ * to reserve space for extended attribute.
|
|
|
+ */
|
|
|
+ if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
|
|
|
+ struct ocfs2_inline_data *idata = &di->id2.i_data;
|
|
|
+ le16_add_cpu(&idata->id_count, -xattrsize);
|
|
|
+ } else if (!(ocfs2_inode_is_fast_symlink(inode))) {
|
|
|
+ struct ocfs2_extent_list *el = &di->id2.i_list;
|
|
|
+ le16_add_cpu(&el->l_count, -(xattrsize /
|
|
|
+ sizeof(struct ocfs2_extent_rec)));
|
|
|
+ }
|
|
|
+ di->i_xattr_inline_size = cpu_to_le16(xattrsize);
|
|
|
+ }
|
|
|
+ /* Update xattr flag */
|
|
|
+ spin_lock(&oi->ip_lock);
|
|
|
+ oi->ip_dyn_features |= flag;
|
|
|
+ di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features);
|
|
|
+ spin_unlock(&oi->ip_lock);
|
|
|
+ /* Update inode ctime */
|
|
|
+ inode->i_ctime = CURRENT_TIME;
|
|
|
+ di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
|
|
|
+ di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
|
|
|
+
|
|
|
+ ret = ocfs2_journal_dirty(handle, xs->inode_bh);
|
|
|
+ if (ret < 0)
|
|
|
+ mlog_errno(ret);
|
|
|
+
|
|
|
+out_commit:
|
|
|
+ ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
|
|
|
+
|
|
|
+ if (!ret && xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
|
|
|
+ /*
|
|
|
+ * Set value outside in B tree.
|
|
|
+ * This is the second step for value size > INLINE_SIZE.
|
|
|
+ */
|
|
|
+ size_t offs = le16_to_cpu(xs->here->xe_name_offset);
|
|
|
+ ret = ocfs2_xattr_set_value_outside(inode, xi, xs, offs);
|
|
|
+ if (ret < 0) {
|
|
|
+ int ret2;
|
|
|
+
|
|
|
+ mlog_errno(ret);
|
|
|
+ /*
|
|
|
+ * If set value outside failed, we have to clean
|
|
|
+ * the junk tree root we have already set in local.
|
|
|
+ */
|
|
|
+ ret2 = ocfs2_xattr_cleanup(inode, xi, xs, offs);
|
|
|
+ if (ret2 < 0)
|
|
|
+ mlog_errno(ret2);
|
|
|
+ }
|
|
|
+ }
|
|
|
+out:
|
|
|
+ return ret;
|
|
|
+
|
|
|
+}
|
|
|
+
|
|
|
+static int ocfs2_xattr_free_block(handle_t *handle,
|
|
|
+ struct ocfs2_super *osb,
|
|
|
+ struct ocfs2_xattr_block *xb)
|
|
|
+{
|
|
|
+ struct inode *xb_alloc_inode;
|
|
|
+ struct buffer_head *xb_alloc_bh = NULL;
|
|
|
+ u64 blk = le64_to_cpu(xb->xb_blkno);
|
|
|
+ u16 bit = le16_to_cpu(xb->xb_suballoc_bit);
|
|
|
+ u64 bg_blkno = ocfs2_which_suballoc_group(blk, bit);
|
|
|
+ int ret = 0;
|
|
|
+
|
|
|
+ xb_alloc_inode = ocfs2_get_system_file_inode(osb,
|
|
|
+ EXTENT_ALLOC_SYSTEM_INODE,
|
|
|
+ le16_to_cpu(xb->xb_suballoc_slot));
|
|
|
+ if (!xb_alloc_inode) {
|
|
|
+ ret = -ENOMEM;
|
|
|
+ mlog_errno(ret);
|
|
|
+ goto out;
|
|
|
+ }
|
|
|
+ mutex_lock(&xb_alloc_inode->i_mutex);
|
|
|
+
|
|
|
+ ret = ocfs2_inode_lock(xb_alloc_inode, &xb_alloc_bh, 1);
|
|
|
+ if (ret < 0) {
|
|
|
+ mlog_errno(ret);
|
|
|
+ goto out_mutex;
|
|
|
+ }
|
|
|
+ ret = ocfs2_extend_trans(handle, OCFS2_SUBALLOC_FREE);
|
|
|
+ if (ret < 0) {
|
|
|
+ mlog_errno(ret);
|
|
|
+ goto out_unlock;
|
|
|
+ }
|
|
|
+ ret = ocfs2_free_suballoc_bits(handle, xb_alloc_inode, xb_alloc_bh,
|
|
|
+ bit, bg_blkno, 1);
|
|
|
+ if (ret < 0)
|
|
|
+ mlog_errno(ret);
|
|
|
+out_unlock:
|
|
|
+ ocfs2_inode_unlock(xb_alloc_inode, 1);
|
|
|
+ brelse(xb_alloc_bh);
|
|
|
+out_mutex:
|
|
|
+ mutex_unlock(&xb_alloc_inode->i_mutex);
|
|
|
+ iput(xb_alloc_inode);
|
|
|
+out:
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+static int ocfs2_remove_value_outside(struct inode*inode,
|
|
|
+ struct buffer_head *bh,
|
|
|
+ struct ocfs2_xattr_header *header)
|
|
|
+{
|
|
|
+ int ret = 0, i;
|
|
|
+
|
|
|
+ for (i = 0; i < le16_to_cpu(header->xh_count); i++) {
|
|
|
+ struct ocfs2_xattr_entry *entry = &header->xh_entries[i];
|
|
|
+
|
|
|
+ if (!ocfs2_xattr_is_local(entry)) {
|
|
|
+ struct ocfs2_xattr_value_root *xv;
|
|
|
+ void *val;
|
|
|
+
|
|
|
+ val = (void *)header +
|
|
|
+ le16_to_cpu(entry->xe_name_offset);
|
|
|
+ xv = (struct ocfs2_xattr_value_root *)
|
|
|
+ (val + OCFS2_XATTR_SIZE(entry->xe_name_len));
|
|
|
+ ret = ocfs2_xattr_value_truncate(inode, bh, xv, 0);
|
|
|
+ if (ret < 0) {
|
|
|
+ mlog_errno(ret);
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+static int ocfs2_xattr_ibody_remove(struct inode *inode,
|
|
|
+ struct buffer_head *di_bh)
|
|
|
+{
|
|
|
+
|
|
|
+ struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
|
|
|
+ struct ocfs2_xattr_header *header;
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ header = (struct ocfs2_xattr_header *)
|
|
|
+ ((void *)di + inode->i_sb->s_blocksize -
|
|
|
+ le16_to_cpu(di->i_xattr_inline_size));
|
|
|
+
|
|
|
+ ret = ocfs2_remove_value_outside(inode, di_bh, header);
|
|
|
+
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+static int ocfs2_xattr_block_remove(struct inode *inode,
|
|
|
+ struct buffer_head *blk_bh)
|
|
|
+{
|
|
|
+ struct ocfs2_xattr_block *xb;
|
|
|
+ struct ocfs2_xattr_header *header;
|
|
|
+ int ret = 0;
|
|
|
+
|
|
|
+ xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
|
|
|
+ header = &(xb->xb_attrs.xb_header);
|
|
|
+
|
|
|
+ ret = ocfs2_remove_value_outside(inode, blk_bh, header);
|
|
|
+
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * ocfs2_xattr_remove()
|
|
|
+ *
|
|
|
+ * Free extended attribute resources associated with this inode.
|
|
|
+ */
|
|
|
+int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh)
|
|
|
+{
|
|
|
+ struct ocfs2_xattr_block *xb;
|
|
|
+ struct buffer_head *blk_bh = NULL;
|
|
|
+ struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
|
+ struct ocfs2_inode_info *oi = OCFS2_I(inode);
|
|
|
+ struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
|
|
|
+ handle_t *handle;
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
|
|
|
+ return 0;
|
|
|
+
|
|
|
+ if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) {
|
|
|
+ ret = ocfs2_xattr_ibody_remove(inode, di_bh);
|
|
|
+ if (ret < 0) {
|
|
|
+ mlog_errno(ret);
|
|
|
+ goto out;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ if (di->i_xattr_loc) {
|
|
|
+ ret = ocfs2_read_block(OCFS2_SB(inode->i_sb),
|
|
|
+ le64_to_cpu(di->i_xattr_loc),
|
|
|
+ &blk_bh, OCFS2_BH_CACHED, inode);
|
|
|
+ if (ret < 0) {
|
|
|
+ mlog_errno(ret);
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+ /*Verify the signature of xattr block*/
|
|
|
+ if (memcmp((void *)blk_bh->b_data, OCFS2_XATTR_BLOCK_SIGNATURE,
|
|
|
+ strlen(OCFS2_XATTR_BLOCK_SIGNATURE))) {
|
|
|
+ ret = -EFAULT;
|
|
|
+ goto out;
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = ocfs2_xattr_block_remove(inode, blk_bh);
|
|
|
+ if (ret < 0) {
|
|
|
+ mlog_errno(ret);
|
|
|
+ goto out;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)),
|
|
|
+ OCFS2_INODE_UPDATE_CREDITS);
|
|
|
+ if (IS_ERR(handle)) {
|
|
|
+ ret = PTR_ERR(handle);
|
|
|
+ mlog_errno(ret);
|
|
|
+ goto out;
|
|
|
+ }
|
|
|
+ ret = ocfs2_journal_access(handle, inode, di_bh,
|
|
|
+ OCFS2_JOURNAL_ACCESS_WRITE);
|
|
|
+ if (ret) {
|
|
|
+ mlog_errno(ret);
|
|
|
+ goto out_commit;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (di->i_xattr_loc) {
|
|
|
+ xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
|
|
|
+ ocfs2_xattr_free_block(handle, osb, xb);
|
|
|
+ di->i_xattr_loc = cpu_to_le64(0);
|
|
|
+ }
|
|
|
+
|
|
|
+ spin_lock(&oi->ip_lock);
|
|
|
+ oi->ip_dyn_features &= ~(OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL);
|
|
|
+ di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features);
|
|
|
+ spin_unlock(&oi->ip_lock);
|
|
|
+
|
|
|
+ ret = ocfs2_journal_dirty(handle, di_bh);
|
|
|
+ if (ret < 0)
|
|
|
+ mlog_errno(ret);
|
|
|
+out_commit:
|
|
|
+ ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
|
|
|
+out:
|
|
|
+ brelse(blk_bh);
|
|
|
+
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+static int ocfs2_xattr_has_space_inline(struct inode *inode,
|
|
|
+ struct ocfs2_dinode *di)
|
|
|
+{
|
|
|
+ struct ocfs2_inode_info *oi = OCFS2_I(inode);
|
|
|
+ unsigned int xattrsize = OCFS2_SB(inode->i_sb)->s_xattr_inline_size;
|
|
|
+ int free;
|
|
|
+
|
|
|
+ if (xattrsize < OCFS2_MIN_XATTR_INLINE_SIZE)
|
|
|
+ return 0;
|
|
|
+
|
|
|
+ if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
|
|
|
+ struct ocfs2_inline_data *idata = &di->id2.i_data;
|
|
|
+ free = le16_to_cpu(idata->id_count) - le64_to_cpu(di->i_size);
|
|
|
+ } else if (ocfs2_inode_is_fast_symlink(inode)) {
|
|
|
+ free = ocfs2_fast_symlink_chars(inode->i_sb) -
|
|
|
+ le64_to_cpu(di->i_size);
|
|
|
+ } else {
|
|
|
+ struct ocfs2_extent_list *el = &di->id2.i_list;
|
|
|
+ free = (le16_to_cpu(el->l_count) -
|
|
|
+ le16_to_cpu(el->l_next_free_rec)) *
|
|
|
+ sizeof(struct ocfs2_extent_rec);
|
|
|
+ }
|
|
|
+ if (free >= xattrsize)
|
|
|
+ return 1;
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * ocfs2_xattr_ibody_find()
|
|
|
+ *
|
|
|
+ * Find extended attribute in inode block and
|
|
|
+ * fill search info into struct ocfs2_xattr_search.
|
|
|
+ */
|
|
|
+static int ocfs2_xattr_ibody_find(struct inode *inode,
|
|
|
+ int name_index,
|
|
|
+ const char *name,
|
|
|
+ struct ocfs2_xattr_search *xs)
|
|
|
+{
|
|
|
+ struct ocfs2_inode_info *oi = OCFS2_I(inode);
|
|
|
+ struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
|
|
|
+ int ret;
|
|
|
+ int has_space = 0;
|
|
|
+
|
|
|
+ if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE)
|
|
|
+ return 0;
|
|
|
+
|
|
|
+ if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) {
|
|
|
+ down_read(&oi->ip_alloc_sem);
|
|
|
+ has_space = ocfs2_xattr_has_space_inline(inode, di);
|
|
|
+ up_read(&oi->ip_alloc_sem);
|
|
|
+ if (!has_space)
|
|
|
+ return 0;
|
|
|
+ }
|
|
|
+
|
|
|
+ xs->xattr_bh = xs->inode_bh;
|
|
|
+ xs->end = (void *)di + inode->i_sb->s_blocksize;
|
|
|
+ if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)
|
|
|
+ xs->header = (struct ocfs2_xattr_header *)
|
|
|
+ (xs->end - le16_to_cpu(di->i_xattr_inline_size));
|
|
|
+ else
|
|
|
+ xs->header = (struct ocfs2_xattr_header *)
|
|
|
+ (xs->end - OCFS2_SB(inode->i_sb)->s_xattr_inline_size);
|
|
|
+ xs->base = (void *)xs->header;
|
|
|
+ xs->here = xs->header->xh_entries;
|
|
|
+
|
|
|
+ /* Find the named attribute. */
|
|
|
+ if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) {
|
|
|
+ ret = ocfs2_xattr_find_entry(name_index, name, xs);
|
|
|
+ if (ret && ret != -ENODATA)
|
|
|
+ return ret;
|
|
|
+ xs->not_found = ret;
|
|
|
+ }
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * ocfs2_xattr_ibody_set()
|
|
|
+ *
|
|
|
+ * Set, replace or remove an extended attribute into inode block.
|
|
|
+ *
|
|
|
+ */
|
|
|
+static int ocfs2_xattr_ibody_set(struct inode *inode,
|
|
|
+ struct ocfs2_xattr_info *xi,
|
|
|
+ struct ocfs2_xattr_search *xs)
|
|
|
+{
|
|
|
+ struct ocfs2_inode_info *oi = OCFS2_I(inode);
|
|
|
+ struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE)
|
|
|
+ return -ENOSPC;
|
|
|
+
|
|
|
+ down_write(&oi->ip_alloc_sem);
|
|
|
+ if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) {
|
|
|
+ if (!ocfs2_xattr_has_space_inline(inode, di)) {
|
|
|
+ ret = -ENOSPC;
|
|
|
+ goto out;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = ocfs2_xattr_set_entry(inode, xi, xs,
|
|
|
+ (OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL));
|
|
|
+out:
|
|
|
+ up_write(&oi->ip_alloc_sem);
|
|
|
+
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * ocfs2_xattr_block_find()
|
|
|
+ *
|
|
|
+ * Find extended attribute in external block and
|
|
|
+ * fill search info into struct ocfs2_xattr_search.
|
|
|
+ */
|
|
|
+static int ocfs2_xattr_block_find(struct inode *inode,
|
|
|
+ int name_index,
|
|
|
+ const char *name,
|
|
|
+ struct ocfs2_xattr_search *xs)
|
|
|
+{
|
|
|
+ struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
|
|
|
+ struct buffer_head *blk_bh = NULL;
|
|
|
+ int ret = 0;
|
|
|
+
|
|
|
+ if (!di->i_xattr_loc)
|
|
|
+ return ret;
|
|
|
+
|
|
|
+ ret = ocfs2_read_block(OCFS2_SB(inode->i_sb),
|
|
|
+ le64_to_cpu(di->i_xattr_loc),
|
|
|
+ &blk_bh, OCFS2_BH_CACHED, inode);
|
|
|
+ if (ret < 0) {
|
|
|
+ mlog_errno(ret);
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+ /*Verify the signature of xattr block*/
|
|
|
+ if (memcmp((void *)blk_bh->b_data, OCFS2_XATTR_BLOCK_SIGNATURE,
|
|
|
+ strlen(OCFS2_XATTR_BLOCK_SIGNATURE))) {
|
|
|
+ ret = -EFAULT;
|
|
|
+ goto cleanup;
|
|
|
+ }
|
|
|
+
|
|
|
+ xs->xattr_bh = blk_bh;
|
|
|
+ xs->header = &((struct ocfs2_xattr_block *)blk_bh->b_data)->
|
|
|
+ xb_attrs.xb_header;
|
|
|
+ xs->base = (void *)xs->header;
|
|
|
+ xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size;
|
|
|
+ xs->here = xs->header->xh_entries;
|
|
|
+
|
|
|
+ ret = ocfs2_xattr_find_entry(name_index, name, xs);
|
|
|
+ if (ret && ret != -ENODATA) {
|
|
|
+ xs->xattr_bh = NULL;
|
|
|
+ goto cleanup;
|
|
|
+ }
|
|
|
+ xs->not_found = ret;
|
|
|
+ return 0;
|
|
|
+
|
|
|
+cleanup:
|
|
|
+ brelse(blk_bh);
|
|
|
+
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * ocfs2_xattr_block_set()
|
|
|
+ *
|
|
|
+ * Set, replace or remove an extended attribute into external block.
|
|
|
+ *
|
|
|
+ */
|
|
|
+static int ocfs2_xattr_block_set(struct inode *inode,
|
|
|
+ struct ocfs2_xattr_info *xi,
|
|
|
+ struct ocfs2_xattr_search *xs)
|
|
|
+{
|
|
|
+ struct buffer_head *new_bh = NULL;
|
|
|
+ struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
|
+ struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
|
|
|
+ struct ocfs2_alloc_context *meta_ac = NULL;
|
|
|
+ handle_t *handle = NULL;
|
|
|
+ struct ocfs2_xattr_block *xblk = NULL;
|
|
|
+ u16 suballoc_bit_start;
|
|
|
+ u32 num_got;
|
|
|
+ u64 first_blkno;
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ if (!xs->xattr_bh) {
|
|
|
+ /*
|
|
|
+ * Alloc one external block for extended attribute
|
|
|
+ * outside of inode.
|
|
|
+ */
|
|
|
+ ret = ocfs2_reserve_new_metadata_blocks(osb, 1, &meta_ac);
|
|
|
+ if (ret < 0) {
|
|
|
+ mlog_errno(ret);
|
|
|
+ goto out;
|
|
|
+ }
|
|
|
+ handle = ocfs2_start_trans(osb,
|
|
|
+ OCFS2_XATTR_BLOCK_CREATE_CREDITS);
|
|
|
+ if (IS_ERR(handle)) {
|
|
|
+ ret = PTR_ERR(handle);
|
|
|
+ mlog_errno(ret);
|
|
|
+ goto out;
|
|
|
+ }
|
|
|
+ ret = ocfs2_journal_access(handle, inode, xs->inode_bh,
|
|
|
+ OCFS2_JOURNAL_ACCESS_CREATE);
|
|
|
+ if (ret < 0) {
|
|
|
+ mlog_errno(ret);
|
|
|
+ goto out_commit;
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = ocfs2_claim_metadata(osb, handle, meta_ac, 1,
|
|
|
+ &suballoc_bit_start, &num_got,
|
|
|
+ &first_blkno);
|
|
|
+ if (ret < 0) {
|
|
|
+ mlog_errno(ret);
|
|
|
+ goto out_commit;
|
|
|
+ }
|
|
|
+
|
|
|
+ new_bh = sb_getblk(inode->i_sb, first_blkno);
|
|
|
+ ocfs2_set_new_buffer_uptodate(inode, new_bh);
|
|
|
+
|
|
|
+ ret = ocfs2_journal_access(handle, inode, new_bh,
|
|
|
+ OCFS2_JOURNAL_ACCESS_CREATE);
|
|
|
+ if (ret < 0) {
|
|
|
+ mlog_errno(ret);
|
|
|
+ goto out_commit;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Initialize ocfs2_xattr_block */
|
|
|
+ xs->xattr_bh = new_bh;
|
|
|
+ xblk = (struct ocfs2_xattr_block *)new_bh->b_data;
|
|
|
+ memset(xblk, 0, inode->i_sb->s_blocksize);
|
|
|
+ strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE);
|
|
|
+ xblk->xb_suballoc_slot = cpu_to_le16(osb->slot_num);
|
|
|
+ xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start);
|
|
|
+ xblk->xb_fs_generation = cpu_to_le32(osb->fs_generation);
|
|
|
+ xblk->xb_blkno = cpu_to_le64(first_blkno);
|
|
|
+
|
|
|
+ xs->header = &xblk->xb_attrs.xb_header;
|
|
|
+ xs->base = (void *)xs->header;
|
|
|
+ xs->end = (void *)xblk + inode->i_sb->s_blocksize;
|
|
|
+ xs->here = xs->header->xh_entries;
|
|
|
+
|
|
|
+
|
|
|
+ ret = ocfs2_journal_dirty(handle, new_bh);
|
|
|
+ if (ret < 0) {
|
|
|
+ mlog_errno(ret);
|
|
|
+ goto out_commit;
|
|
|
+ }
|
|
|
+ di->i_xattr_loc = cpu_to_le64(first_blkno);
|
|
|
+ ret = ocfs2_journal_dirty(handle, xs->inode_bh);
|
|
|
+ if (ret < 0)
|
|
|
+ mlog_errno(ret);
|
|
|
+out_commit:
|
|
|
+ ocfs2_commit_trans(osb, handle);
|
|
|
+out:
|
|
|
+ if (meta_ac)
|
|
|
+ ocfs2_free_alloc_context(meta_ac);
|
|
|
+ if (ret < 0)
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Set extended attribute into external block */
|
|
|
+ ret = ocfs2_xattr_set_entry(inode, xi, xs, OCFS2_HAS_XATTR_FL);
|
|
|
+
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * ocfs2_xattr_set()
|
|
|
+ *
|
|
|
+ * Set, replace or remove an extended attribute for this inode.
|
|
|
+ * value is NULL to remove an existing extended attribute, else either
|
|
|
+ * create or replace an extended attribute.
|
|
|
+ */
|
|
|
+int ocfs2_xattr_set(struct inode *inode,
|
|
|
+ int name_index,
|
|
|
+ const char *name,
|
|
|
+ const void *value,
|
|
|
+ size_t value_len,
|
|
|
+ int flags)
|
|
|
+{
|
|
|
+ struct buffer_head *di_bh = NULL;
|
|
|
+ struct ocfs2_dinode *di;
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ struct ocfs2_xattr_info xi = {
|
|
|
+ .name_index = name_index,
|
|
|
+ .name = name,
|
|
|
+ .value = value,
|
|
|
+ .value_len = value_len,
|
|
|
+ };
|
|
|
+
|
|
|
+ struct ocfs2_xattr_search xis = {
|
|
|
+ .not_found = -ENODATA,
|
|
|
+ };
|
|
|
+
|
|
|
+ struct ocfs2_xattr_search xbs = {
|
|
|
+ .not_found = -ENODATA,
|
|
|
+ };
|
|
|
+
|
|
|
+ ret = ocfs2_inode_lock(inode, &di_bh, 1);
|
|
|
+ if (ret < 0) {
|
|
|
+ mlog_errno(ret);
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+ xis.inode_bh = xbs.inode_bh = di_bh;
|
|
|
+ di = (struct ocfs2_dinode *)di_bh->b_data;
|
|
|
+
|
|
|
+ down_write(&OCFS2_I(inode)->ip_xattr_sem);
|
|
|
+ /*
|
|
|
+ * Scan inode and external block to find the same name
|
|
|
+ * extended attribute and collect search infomation.
|
|
|
+ */
|
|
|
+ ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis);
|
|
|
+ if (ret)
|
|
|
+ goto cleanup;
|
|
|
+ if (xis.not_found) {
|
|
|
+ ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs);
|
|
|
+ if (ret)
|
|
|
+ goto cleanup;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (xis.not_found && xbs.not_found) {
|
|
|
+ ret = -ENODATA;
|
|
|
+ if (flags & XATTR_REPLACE)
|
|
|
+ goto cleanup;
|
|
|
+ ret = 0;
|
|
|
+ if (!value)
|
|
|
+ goto cleanup;
|
|
|
+ } else {
|
|
|
+ ret = -EEXIST;
|
|
|
+ if (flags & XATTR_CREATE)
|
|
|
+ goto cleanup;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (!value) {
|
|
|
+ /* Remove existing extended attribute */
|
|
|
+ if (!xis.not_found)
|
|
|
+ ret = ocfs2_xattr_ibody_set(inode, &xi, &xis);
|
|
|
+ else if (!xbs.not_found)
|
|
|
+ ret = ocfs2_xattr_block_set(inode, &xi, &xbs);
|
|
|
+ } else {
|
|
|
+ /* We always try to set extended attribute into inode first*/
|
|
|
+ ret = ocfs2_xattr_ibody_set(inode, &xi, &xis);
|
|
|
+ if (!ret && !xbs.not_found) {
|
|
|
+ /*
|
|
|
+ * If succeed and that extended attribute existing in
|
|
|
+ * external block, then we will remove it.
|
|
|
+ */
|
|
|
+ xi.value = NULL;
|
|
|
+ xi.value_len = 0;
|
|
|
+ ret = ocfs2_xattr_block_set(inode, &xi, &xbs);
|
|
|
+ } else if (ret == -ENOSPC) {
|
|
|
+ if (di->i_xattr_loc && !xbs.xattr_bh) {
|
|
|
+ ret = ocfs2_xattr_block_find(inode, name_index,
|
|
|
+ name, &xbs);
|
|
|
+ if (ret)
|
|
|
+ goto cleanup;
|
|
|
+ }
|
|
|
+ /*
|
|
|
+ * If no space in inode, we will set extended attribute
|
|
|
+ * into external block.
|
|
|
+ */
|
|
|
+ ret = ocfs2_xattr_block_set(inode, &xi, &xbs);
|
|
|
+ if (ret)
|
|
|
+ goto cleanup;
|
|
|
+ if (!xis.not_found) {
|
|
|
+ /*
|
|
|
+ * If succeed and that extended attribute
|
|
|
+ * existing in inode, we will remove it.
|
|
|
+ */
|
|
|
+ xi.value = NULL;
|
|
|
+ xi.value_len = 0;
|
|
|
+ ret = ocfs2_xattr_ibody_set(inode, &xi, &xis);
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+cleanup:
|
|
|
+ up_write(&OCFS2_I(inode)->ip_xattr_sem);
|
|
|
+ ocfs2_inode_unlock(inode, 1);
|
|
|
+ brelse(di_bh);
|
|
|
+ brelse(xbs.xattr_bh);
|
|
|
+
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
Tiger Yang