--- /dev/null
+From: Tiger Yang <tiger.yang@oracle.com>
+Subject: [PATCH 09/16] ocfs2: Add extended attribute support
+Patch-mainline: 2.6.28?
+References: FATE302067
+
+This patch implements storing extended attributes both in inode or a single
+external block. We only store EA's in-inode when blocksize > 512 or that
+inode block has free space for it. When an EA's value is larger than 80
+bytes, we will store the value via b-tree outside inode or block.
+
+Signed-off-by: Tiger Yang <tiger.yang@oracle.com>
+Signed-off-by: Mark Fasheh <mfasheh@suse.com>
+---
+ fs/ocfs2/Makefile | 2
+ fs/ocfs2/file.c | 5
+ fs/ocfs2/inode.c | 8
+ fs/ocfs2/inode.h | 3
+ fs/ocfs2/journal.h | 10
+ fs/ocfs2/namei.c | 5
+ fs/ocfs2/ocfs2.h | 2
+ fs/ocfs2/ocfs2_fs.h | 8
+ fs/ocfs2/suballoc.c | 17
+ fs/ocfs2/suballoc.h | 3
+ fs/ocfs2/super.c | 14
+ fs/ocfs2/symlink.c | 9
+ fs/ocfs2/xattr.c | 1636 +++++++++++++++++++++++++++++++++++++++++++++++
+ fs/ocfs2/xattr.h | 58 +
+ fs/ocfs2/xattr_trusted.c | 82 ++
+ fs/ocfs2/xattr_user.c | 94 ++
+ 16 files changed, 1950 insertions(+), 6 deletions(-)
+ create mode 100644 fs/ocfs2/xattr.h
+ create mode 100644 fs/ocfs2/xattr_trusted.c
+ create mode 100644 fs/ocfs2/xattr_user.c
+
+--- a/fs/ocfs2/Makefile
++++ b/fs/ocfs2/Makefile
+@@ -36,6 +36,8 @@ ocfs2-objs := \
+ uptodate.o \
+ ver.o \
+ xattr.o \
++ xattr_user.o \
++ xattr_trusted.o
+
+ ocfs2_stackglue-objs := stackglue.o
+ ocfs2_stack_o2cb-objs := stack_o2cb.o
+--- a/fs/ocfs2/file.c
++++ b/fs/ocfs2/file.c
+@@ -55,6 +55,7 @@
+ #include "mmap.h"
+ #include "suballoc.h"
+ #include "super.h"
++#include "xattr.h"
+
+ #include "buffer_head_io.h"
+
+@@ -2128,6 +2129,10 @@ const struct inode_operations ocfs2_file
+ .setattr = ocfs2_setattr,
+ .getattr = ocfs2_getattr,
+ .permission = ocfs2_permission,
++ .setxattr = generic_setxattr,
++ .getxattr = generic_getxattr,
++ .listxattr = ocfs2_listxattr,
++ .removexattr = generic_removexattr,
+ .fallocate = ocfs2_fallocate,
+ };
+
+--- a/fs/ocfs2/inode.c
++++ b/fs/ocfs2/inode.c
+@@ -49,6 +49,7 @@
+ #include "symlink.h"
+ #include "sysfile.h"
+ #include "uptodate.h"
++#include "xattr.h"
+
+ #include "buffer_head_io.h"
+
+@@ -728,6 +729,13 @@ static int ocfs2_wipe_inode(struct inode
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail_unlock_dir;
++ }
++
++ /*Free extended attribute resources associated with this inode.*/
++ status = ocfs2_xattr_remove(inode, di_bh);
++ if (status < 0) {
++ mlog_errno(status);
++ goto bail_unlock_dir;
+ }
+
+ status = ocfs2_remove_inode(inode, di_bh, orphan_dir_inode,
+--- a/fs/ocfs2/inode.h
++++ b/fs/ocfs2/inode.h
+@@ -40,6 +40,9 @@ struct ocfs2_inode_info
+ /* protects allocation changes on this inode. */
+ struct rw_semaphore ip_alloc_sem;
+
++ /* protects extended attribute changes on this inode */
++ struct rw_semaphore ip_xattr_sem;
++
+ /* These fields are protected by ip_lock */
+ spinlock_t ip_lock;
+ u32 ip_open_count;
+--- a/fs/ocfs2/journal.h
++++ b/fs/ocfs2/journal.h
+@@ -283,6 +283,9 @@ int ocfs2_journal_dirty
+ /* simple file updates like chmod, etc. */
+ #define OCFS2_INODE_UPDATE_CREDITS 1
+
++/* extended attribute block update */
++#define OCFS2_XATTR_BLOCK_UPDATE_CREDITS 1
++
+ /* group extend. inode update and last group update. */
+ #define OCFS2_GROUP_EXTEND_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1)
+
+@@ -340,6 +343,13 @@ int ocfs2_journal_dirty
+ #define OCFS2_RENAME_CREDITS (3 * OCFS2_INODE_UPDATE_CREDITS + 3 \
+ + OCFS2_UNLINK_CREDITS)
+
++/* global bitmap dinode, group desc., relinked group,
++ * suballocator dinode, group desc., relinked group,
++ * dinode, xattr block */
++#define OCFS2_XATTR_BLOCK_CREATE_CREDITS (OCFS2_SUBALLOC_ALLOC * 2 + \
++ + OCFS2_INODE_UPDATE_CREDITS \
++ + OCFS2_XATTR_BLOCK_UPDATE_CREDITS)
++
+ /*
+ * Please note that the caller must make sure that root_el is the root
+ * of extent tree. So for an inode, it should be &fe->id2.i_list. Otherwise
+--- a/fs/ocfs2/namei.c
++++ b/fs/ocfs2/namei.c
+@@ -60,6 +60,7 @@
+ #include "symlink.h"
+ #include "sysfile.h"
+ #include "uptodate.h"
++#include "xattr.h"
+
+ #include "buffer_head_io.h"
+
+@@ -1918,4 +1919,8 @@ const struct inode_operations ocfs2_dir_
+ .setattr = ocfs2_setattr,
+ .getattr = ocfs2_getattr,
+ .permission = ocfs2_permission,
++ .setxattr = generic_setxattr,
++ .getxattr = generic_getxattr,
++ .listxattr = ocfs2_listxattr,
++ .removexattr = generic_removexattr,
+ };
+--- a/fs/ocfs2/ocfs2.h
++++ b/fs/ocfs2/ocfs2.h
+@@ -184,6 +184,7 @@ enum ocfs2_mount_options
+ OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */
+ OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */
+ OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */
++ OCFS2_MOUNT_NOUSERXATTR = 1 << 6, /* No user xattr */
+ };
+
+ #define OCFS2_OSB_SOFT_RO 0x0001
+@@ -214,6 +215,7 @@ struct ocfs2_super
+ u32 bitmap_cpg;
+ u8 *uuid;
+ char *uuid_str;
++ u32 uuid_hash;
+ u8 *vol_label;
+ u64 first_cluster_group_blkno;
+ u32 fs_generation;
+--- a/fs/ocfs2/ocfs2_fs.h
++++ b/fs/ocfs2/ocfs2_fs.h
+@@ -570,7 +570,7 @@ struct ocfs2_super_block {
+ /*40*/ __le16 s_max_slots; /* Max number of simultaneous mounts
+ before tunefs required */
+ __le16 s_tunefs_flag;
+- __le32 s_reserved1;
++ __le32 s_uuid_hash; /* hash value of uuid */
+ __le64 s_first_cluster_group; /* Block offset of 1st cluster
+ * group header */
+ /*50*/ __u8 s_label[OCFS2_MAX_VOL_LABEL_LEN]; /* Label for mounting, etc. */
+@@ -787,7 +787,11 @@ struct ocfs2_xattr_tree_root {
+ /*10*/ struct ocfs2_extent_list xt_list; /* Extent record list */
+ };
+
+-#define OCFS2_XATTR_INDEXED 0x1
++#define OCFS2_XATTR_INDEXED 0x1
++#define OCFS2_HASH_SHIFT 5
++#define OCFS2_XATTR_ROUND 3
++#define OCFS2_XATTR_SIZE(size) (((size) + OCFS2_XATTR_ROUND) & \
++ ~(OCFS2_XATTR_ROUND))
+
+ /*
+ * On disk structure for xattr block.
+--- a/fs/ocfs2/suballoc.c
++++ b/fs/ocfs2/suballoc.c
+@@ -493,9 +493,9 @@ bail:
+ return status;
+ }
+
+-int ocfs2_reserve_new_metadata(struct ocfs2_super *osb,
+- struct ocfs2_extent_list *root_el,
+- struct ocfs2_alloc_context **ac)
++int ocfs2_reserve_new_metadata_blocks(struct ocfs2_super *osb,
++ int blocks,
++ struct ocfs2_alloc_context **ac)
+ {
+ int status;
+ u32 slot;
+@@ -507,7 +507,7 @@ int ocfs2_reserve_new_metadata(struct oc
+ goto bail;
+ }
+
+- (*ac)->ac_bits_wanted = ocfs2_extend_meta_needed(root_el);
++ (*ac)->ac_bits_wanted = blocks;
+ (*ac)->ac_which = OCFS2_AC_USE_META;
+ slot = osb->slot_num;
+ (*ac)->ac_group_search = ocfs2_block_group_search;
+@@ -532,6 +532,15 @@ bail:
+ return status;
+ }
+
++int ocfs2_reserve_new_metadata(struct ocfs2_super *osb,
++ struct ocfs2_extent_list *root_el,
++ struct ocfs2_alloc_context **ac)
++{
++ return ocfs2_reserve_new_metadata_blocks(osb,
++ ocfs2_extend_meta_needed(root_el),
++ ac);
++}
++
+ static int ocfs2_steal_inode_from_other_nodes(struct ocfs2_super *osb,
+ struct ocfs2_alloc_context *ac)
+ {
+--- a/fs/ocfs2/suballoc.h
++++ b/fs/ocfs2/suballoc.h
+@@ -67,6 +67,9 @@ static inline int ocfs2_alloc_context_bi
+ int ocfs2_reserve_new_metadata(struct ocfs2_super *osb,
+ struct ocfs2_extent_list *root_el,
+ struct ocfs2_alloc_context **ac);
++int ocfs2_reserve_new_metadata_blocks(struct ocfs2_super *osb,
++ int blocks,
++ struct ocfs2_alloc_context **ac);
+ int ocfs2_reserve_new_inode(struct ocfs2_super *osb,
+ struct ocfs2_alloc_context **ac);
+ int ocfs2_reserve_clusters(struct ocfs2_super *osb,
+--- a/fs/ocfs2/super.c
++++ b/fs/ocfs2/super.c
+@@ -64,6 +64,7 @@
+ #include "sysfile.h"
+ #include "uptodate.h"
+ #include "ver.h"
++#include "xattr.h"
+
+ #include "buffer_head_io.h"
+
+@@ -154,6 +155,8 @@ enum {
+ Opt_localalloc,
+ Opt_localflocks,
+ Opt_stack,
++ Opt_user_xattr,
++ Opt_nouser_xattr,
+ Opt_err,
+ };
+
+@@ -173,6 +176,8 @@ static match_table_t tokens = {
+ {Opt_localalloc, "localalloc=%d"},
+ {Opt_localflocks, "localflocks"},
+ {Opt_stack, "cluster_stack=%s"},
++ {Opt_user_xattr, "user_xattr"},
++ {Opt_nouser_xattr, "nouser_xattr"},
+ {Opt_err, NULL}
+ };
+
+@@ -847,6 +852,12 @@ static int ocfs2_parse_options(struct su
+ case Opt_data_writeback:
+ mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
+ break;
++ case Opt_user_xattr:
++ mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
++ break;
++ case Opt_nouser_xattr:
++ mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
++ break;
+ case Opt_atime_quantum:
+ if (match_int(&args[0], &option)) {
+ status = 0;
+@@ -1132,6 +1143,7 @@ static void ocfs2_inode_init_once(void *
+ oi->ip_dir_start_lookup = 0;
+
+ init_rwsem(&oi->ip_alloc_sem);
++ init_rwsem(&oi->ip_xattr_sem);
+ mutex_init(&oi->ip_io_mutex);
+
+ oi->ip_blkno = 0ULL;
+@@ -1375,6 +1387,7 @@ static int ocfs2_initialize_super(struct
+ sb->s_fs_info = osb;
+ sb->s_op = &ocfs2_sops;
+ sb->s_export_op = &ocfs2_export_ops;
++ sb->s_xattr = ocfs2_xattr_handlers;
+ sb->s_time_gran = 1;
+ sb->s_flags |= MS_NOATIME;
+ /* this is needed to support O_LARGEFILE */
+@@ -1570,6 +1583,7 @@ static int ocfs2_initialize_super(struct
+ osb->first_cluster_group_blkno =
+ le64_to_cpu(di->id2.i_super.s_first_cluster_group);
+ osb->fs_generation = le32_to_cpu(di->i_fs_generation);
++ osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
+ mlog(0, "vol_label: %s\n", osb->vol_label);
+ mlog(0, "uuid: %s\n", osb->uuid_str);
+ mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n",
+--- a/fs/ocfs2/symlink.c
++++ b/fs/ocfs2/symlink.c
+@@ -50,6 +50,7 @@
+ #include "inode.h"
+ #include "journal.h"
+ #include "symlink.h"
++#include "xattr.h"
+
+ #include "buffer_head_io.h"
+
+@@ -168,10 +169,18 @@ const struct inode_operations ocfs2_syml
+ .follow_link = ocfs2_follow_link,
+ .getattr = ocfs2_getattr,
+ .setattr = ocfs2_setattr,
++ .setxattr = generic_setxattr,
++ .getxattr = generic_getxattr,
++ .listxattr = ocfs2_listxattr,
++ .removexattr = generic_removexattr,
+ };
+ const struct inode_operations ocfs2_fast_symlink_inode_operations = {
+ .readlink = ocfs2_readlink,
+ .follow_link = ocfs2_follow_link,
+ .getattr = ocfs2_getattr,
+ .setattr = ocfs2_setattr,
++ .setxattr = generic_setxattr,
++ .getxattr = generic_getxattr,
++ .listxattr = ocfs2_listxattr,
++ .removexattr = generic_removexattr,
+ };
+--- a/fs/ocfs2/xattr.c
++++ b/fs/ocfs2/xattr.c
+@@ -5,6 +5,9 @@
+ *
+ * Copyright (C) 2008 Oracle. All rights reserved.
+ *
++ * CREDITS:
++ * Lots of code in this file is taken from ext3.
++ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation; either
+@@ -21,6 +24,19 @@
+ * Boston, MA 021110-1307, USA.
+ */
+
++#include <linux/capability.h>
++#include <linux/fs.h>
++#include <linux/types.h>
++#include <linux/slab.h>
++#include <linux/highmem.h>
++#include <linux/pagemap.h>
++#include <linux/uio.h>
++#include <linux/sched.h>
++#include <linux/splice.h>
++#include <linux/mount.h>
++#include <linux/writeback.h>
++#include <linux/falloc.h>
++
+ #define MLOG_MASK_PREFIX ML_XATTR
+ #include <cluster/masklog.h>
+
+@@ -28,12 +44,135 @@
+ #include "alloc.h"
+ #include "dlmglue.h"
+ #include "file.h"
++#include "symlink.h"
++#include "sysfile.h"
+ #include "inode.h"
+ #include "journal.h"
+ #include "ocfs2_fs.h"
+ #include "suballoc.h"
+ #include "uptodate.h"
+ #include "buffer_head_io.h"
++#include "xattr.h"
++
++
++struct ocfs2_xattr_def_value_root {
++ struct ocfs2_xattr_value_root xv;
++ struct ocfs2_extent_rec er;
++};
++
++#define OCFS2_XATTR_ROOT_SIZE (sizeof(struct ocfs2_xattr_def_value_root))
++#define OCFS2_XATTR_INLINE_SIZE 80
++
++static struct ocfs2_xattr_def_value_root def_xv = {
++ .xv.xr_list.l_count = cpu_to_le16(1),
++};
++
++struct xattr_handler *ocfs2_xattr_handlers[] = {
++ &ocfs2_xattr_user_handler,
++#ifdef CONFIG_OCFS2_FS_POSIX_ACL
++ &ocfs2_xattr_acl_access_handler,
++ &ocfs2_xattr_acl_default_handler,
++#endif
++ &ocfs2_xattr_trusted_handler,
++#ifdef CONFIG_OCFS2_FS_SECURITY
++ &ocfs2_xattr_security_handler,
++#endif
++ NULL
++};
++
++static struct xattr_handler *ocfs2_xattr_handler_map[] = {
++ [OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler,
++#ifdef CONFIG_OCFS2_FS_POSIX_ACL
++ [OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS]
++ = &ocfs2_xattr_acl_access_handler,
++ [OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT]
++ = &ocfs2_xattr_acl_default_handler,
++#endif
++ [OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler,
++#ifdef CONFIG_OCFS2_FS_SECURITY
++ [OCFS2_XATTR_INDEX_SECURITY] = &ocfs2_xattr_security_handler,
++#endif
++};
++
++struct ocfs2_xattr_info {
++ int name_index;
++ const char *name;
++ const void *value;
++ size_t value_len;
++};
++
++struct ocfs2_xattr_search {
++ struct buffer_head *inode_bh;
++ /*
++ * xattr_bh point to the block buffer head which has extended attribute
++ * when extended attribute in inode, xattr_bh is equal to inode_bh.
++ */
++ struct buffer_head *xattr_bh;
++ struct ocfs2_xattr_header *header;
++ void *base;
++ void *end;
++ struct ocfs2_xattr_entry *here;
++ int not_found;
++};
++
++static inline struct xattr_handler *ocfs2_xattr_handler(int name_index)
++{
++ struct xattr_handler *handler = NULL;
++
++ if (name_index > 0 && name_index < OCFS2_XATTR_MAX)
++ handler = ocfs2_xattr_handler_map[name_index];
++
++ return handler;
++}
++
++static inline u32 ocfs2_xattr_name_hash(struct inode *inode,
++ char *prefix,
++ int prefix_len,
++ char *name,
++ int name_len)
++{
++ /* Get hash value of uuid from super block */
++ u32 hash = OCFS2_SB(inode->i_sb)->uuid_hash;
++ int i;
++
++ /* hash extended attribute prefix */
++ for (i = 0; i < prefix_len; i++) {
++ hash = (hash << OCFS2_HASH_SHIFT) ^
++ (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^
++ *prefix++;
++ }
++ /* hash extended attribute name */
++ for (i = 0; i < name_len; i++) {
++ hash = (hash << OCFS2_HASH_SHIFT) ^
++ (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^
++ *name++;
++ }
++
++ return hash;
++}
++
++/*
++ * ocfs2_xattr_hash_entry()
++ *
++ * Compute the hash of an extended attribute.
++ */
++static void ocfs2_xattr_hash_entry(struct inode *inode,
++ struct ocfs2_xattr_header *header,
++ struct ocfs2_xattr_entry *entry)
++{
++ u32 hash = 0;
++ struct xattr_handler *handler =
++ ocfs2_xattr_handler(ocfs2_xattr_get_type(entry));
++ char *prefix = handler->prefix;
++ char *name = (char *)header + le16_to_cpu(entry->xe_name_offset);
++ int prefix_len = strlen(handler->prefix);
++
++ hash = ocfs2_xattr_name_hash(inode, prefix, prefix_len, name,
++ entry->xe_name_len);
++ entry->xe_name_hash = cpu_to_le32(hash);
++
++ return;
++}
+
+ static int ocfs2_xattr_extend_allocation(struct inode *inode,
+ u32 clusters_to_add,
+@@ -303,3 +442,1500 @@ static int ocfs2_xattr_value_truncate(st
+
+ return ret;
+ }
++
++static int ocfs2_xattr_list_entries(struct inode *inode,
++ struct ocfs2_xattr_header *header,
++ char *buffer, size_t buffer_size)
++{
++ size_t rest = buffer_size;
++ int i;
++
++ for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) {
++ struct ocfs2_xattr_entry *entry = &header->xh_entries[i];
++ struct xattr_handler *handler =
++ ocfs2_xattr_handler(ocfs2_xattr_get_type(entry));
++
++ if (handler) {
++ size_t size = handler->list(inode, buffer, rest,
++ ((char *)header +
++ le16_to_cpu(entry->xe_name_offset)),
++ entry->xe_name_len);
++ if (buffer) {
++ if (size > rest)
++ return -ERANGE;
++ buffer += size;
++ }
++ rest -= size;
++ }
++ }
++
++ return buffer_size - rest;
++}
++
++static int ocfs2_xattr_ibody_list(struct inode *inode,
++ struct ocfs2_dinode *di,
++ char *buffer,
++ size_t buffer_size)
++{
++ struct ocfs2_xattr_header *header = NULL;
++ struct ocfs2_inode_info *oi = OCFS2_I(inode);
++ int ret = 0;
++
++ if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL))
++ return ret;
++
++ header = (struct ocfs2_xattr_header *)
++ ((void *)di + inode->i_sb->s_blocksize -
++ le16_to_cpu(di->i_xattr_inline_size));
++
++ ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size);
++
++ return ret;
++}
++
++static int ocfs2_xattr_block_list(struct inode *inode,
++ struct ocfs2_dinode *di,
++ char *buffer,
++ size_t buffer_size)
++{
++ struct buffer_head *blk_bh = NULL;
++ struct ocfs2_xattr_header *header = 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;
++ }
++
++ header = &((struct ocfs2_xattr_block *)blk_bh->b_data)->
++ xb_attrs.xb_header;
++
++ ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size);
++cleanup:
++ brelse(blk_bh);
++
++ return ret;
++}
++
++ssize_t ocfs2_listxattr(struct dentry *dentry,
++ char *buffer,
++ size_t size)
++{
++ int ret = 0, i_ret = 0, b_ret = 0;
++ struct buffer_head *di_bh = NULL;
++ struct ocfs2_dinode *di = NULL;
++ struct ocfs2_inode_info *oi = OCFS2_I(dentry->d_inode);
++
++ if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
++ return ret;
++
++ ret = ocfs2_inode_lock(dentry->d_inode, &di_bh, 0);
++ if (ret < 0) {
++ mlog_errno(ret);
++ return ret;
++ }
++
++ di = (struct ocfs2_dinode *)di_bh->b_data;
++
++ down_read(&oi->ip_xattr_sem);
++ i_ret = ocfs2_xattr_ibody_list(dentry->d_inode, di, buffer, size);
++ if (i_ret < 0)
++ b_ret = 0;
++ else {
++ if (buffer) {
++ buffer += i_ret;
++ size -= i_ret;
++ }
++ b_ret = ocfs2_xattr_block_list(dentry->d_inode, di,
++ buffer, size);
++ if (b_ret < 0)
++ i_ret = 0;
++ }
++ up_read(&oi->ip_xattr_sem);
++ ocfs2_inode_unlock(dentry->d_inode, 0);
++
++ brelse(di_bh);
++
++ return i_ret + b_ret;
++}
++
++static int ocfs2_xattr_find_entry(int name_index,
++ const char *name,
++ struct ocfs2_xattr_search *xs)
++{
++ struct ocfs2_xattr_entry *entry;
++ size_t name_len;
++ int i, cmp = 1;
++
++ if (name == NULL)
++ return -EINVAL;
++
++ name_len = strlen(name);
++ entry = xs->here;
++ for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) {
++ cmp = name_index - ocfs2_xattr_get_type(entry);
++ if (!cmp)
++ cmp = name_len - entry->xe_name_len;
++ if (!cmp)
++ cmp = memcmp(name, (xs->base +
++ le16_to_cpu(entry->xe_name_offset)),
++ name_len);
++ if (cmp == 0)
++ break;
++ entry += 1;
++ }
++ xs->here = entry;
++
++ return cmp ? -ENODATA : 0;
++}
++
++static int ocfs2_xattr_get_value_outside(struct inode *inode,
++ struct ocfs2_xattr_search *xs,
++ void *buffer,
++ size_t len)
++{
++ u32 cpos, p_cluster, num_clusters, bpc, clusters;
++ u64 blkno;
++ int i, ret = 0;
++ size_t cplen, blocksize;
++ struct buffer_head *bh = NULL;
++ struct ocfs2_xattr_value_root *xv;
++ struct ocfs2_extent_list *el;
++
++ xv = (struct ocfs2_xattr_value_root *)
++ (xs->base + le16_to_cpu(xs->here->xe_name_offset) +
++ OCFS2_XATTR_SIZE(xs->here->xe_name_len));
++ el = &xv->xr_list;
++ clusters = le32_to_cpu(xv->xr_clusters);
++ bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
++ blocksize = inode->i_sb->s_blocksize;
++
++ cpos = 0;
++ while (cpos < clusters) {
++ ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster,
++ &num_clusters, el);
++ if (ret) {
++ mlog_errno(ret);
++ goto out;
++ }
++
++ blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster);
++ /* Copy ocfs2_xattr_value */
++ 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;
++ }
++
++ cplen = len >= blocksize ? blocksize : len;
++ memcpy(buffer, bh->b_data, cplen);
++ len -= cplen;
++ buffer += cplen;
++
++ brelse(bh);
++ bh = NULL;
++ if (len == 0)
++ break;
++ }
++ cpos += num_clusters;
++ }
++out:
++ return ret;
++}
++
++static int ocfs2_xattr_ibody_get(struct inode *inode,
++ int name_index,
++ const char *name,
++ void *buffer,
++ size_t buffer_size,
++ 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;
++ size_t size;
++ int ret = 0;
++
++ if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL))
++ return -ENODATA;
++
++ xs->end = (void *)di + inode->i_sb->s_blocksize;
++ xs->header = (struct ocfs2_xattr_header *)
++ (xs->end - le16_to_cpu(di->i_xattr_inline_size));
++ xs->base = (void *)xs->header;
++ xs->here = xs->header->xh_entries;
++
++ ret = ocfs2_xattr_find_entry(name_index, name, xs);
++ if (ret)
++ return ret;
++ size = le64_to_cpu(xs->here->xe_value_size);
++ if (buffer) {
++ if (size > buffer_size)
++ return -ERANGE;
++ 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);
++ 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;
++}
++
+--- /dev/null
++++ b/fs/ocfs2/xattr.h
+@@ -0,0 +1,58 @@
++/* -*- mode: c; c-basic-offset: 8; -*-
++ * vim: noexpandtab sw=8 ts=8 sts=0:
++ *
++ * xattr.h
++ *
++ * Function prototypes
++ *
++ * Copyright (C) 2008 Oracle. All rights reserved.
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public
++ * License as published by the Free Software Foundation; either
++ * version 2 of the License, or (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ * General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public
++ * License along with this program; if not, write to the
++ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
++ * Boston, MA 021110-1307, USA.
++ */
++
++#ifndef OCFS2_XATTR_H
++#define OCFS2_XATTR_H
++
++#include <linux/init.h>
++#include <linux/xattr.h>
++
++enum ocfs2_xattr_type {
++ OCFS2_XATTR_INDEX_USER = 1,
++ OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS,
++ OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT,
++ OCFS2_XATTR_INDEX_TRUSTED,
++ OCFS2_XATTR_INDEX_SECURITY,
++ OCFS2_XATTR_MAX
++};
++
++extern struct xattr_handler ocfs2_xattr_user_handler;
++extern struct xattr_handler ocfs2_xattr_trusted_handler;
++#ifdef CONFIG_OCFS2_FS_POSIX_ACL
++extern struct xattr_handler ocfs2_xattr_acl_access_handler;
++extern struct xattr_handler ocfs2_xattr_acl_default_handler;
++#endif
++#ifdef CONFIG_OCFS2_FS_SECURITY
++extern struct xattr_handler ocfs2_xattr_security_handler;
++#endif
++
++extern ssize_t ocfs2_listxattr(struct dentry *, char *, size_t);
++extern int ocfs2_xattr_get(struct inode *, int, const char *, void *, size_t);
++extern int ocfs2_xattr_set(struct inode *, int, const char *, const void *,
++ size_t, int);
++extern int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh);
++extern struct xattr_handler *ocfs2_xattr_handlers[];
++
++#endif /* OCFS2_XATTR_H */
+--- /dev/null
++++ b/fs/ocfs2/xattr_trusted.c
+@@ -0,0 +1,82 @@
++/* -*- mode: c; c-basic-offset: 8; -*-
++ * vim: noexpandtab sw=8 ts=8 sts=0:
++ *
++ * xattr_trusted.c
++ *
++ * Copyright (C) 2008 Oracle. All rights reserved.
++ *
++ * CREDITS:
++ * Lots of code in this file is taken from ext3.
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public
++ * License as published by the Free Software Foundation; either
++ * version 2 of the License, or (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ * General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public
++ * License along with this program; if not, write to the
++ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
++ * Boston, MA 021110-1307, USA.
++ */
++
++#include <linux/init.h>
++#include <linux/module.h>
++#include <linux/string.h>
++
++#define MLOG_MASK_PREFIX ML_INODE
++#include <cluster/masklog.h>
++
++#include "ocfs2.h"
++#include "alloc.h"
++#include "dlmglue.h"
++#include "file.h"
++#include "ocfs2_fs.h"
++#include "xattr.h"
++
++#define XATTR_TRUSTED_PREFIX "trusted."
++
++static size_t ocfs2_xattr_trusted_list(struct inode *inode, char *list,
++ size_t list_size, const char *name,
++ size_t name_len)
++{
++ const size_t prefix_len = sizeof(XATTR_TRUSTED_PREFIX) - 1;
++ const size_t total_len = prefix_len + name_len + 1;
++
++ if (list && total_len <= list_size) {
++ memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len);
++ memcpy(list + prefix_len, name, name_len);
++ list[prefix_len + name_len] = '\0';
++ }
++ return total_len;
++}
++
++static int ocfs2_xattr_trusted_get(struct inode *inode, const char *name,
++ void *buffer, size_t size)
++{
++ if (strcmp(name, "") == 0)
++ return -EINVAL;
++ return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_TRUSTED, name,
++ buffer, size);
++}
++
++static int ocfs2_xattr_trusted_set(struct inode *inode, const char *name,
++ const void *value, size_t size, int flags)
++{
++ if (strcmp(name, "") == 0)
++ return -EINVAL;
++
++ return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_TRUSTED, name, value,
++ size, flags);
++}
++
++struct xattr_handler ocfs2_xattr_trusted_handler = {
++ .prefix = XATTR_TRUSTED_PREFIX,
++ .list = ocfs2_xattr_trusted_list,
++ .get = ocfs2_xattr_trusted_get,
++ .set = ocfs2_xattr_trusted_set,
++};
+--- /dev/null
++++ b/fs/ocfs2/xattr_user.c
+@@ -0,0 +1,94 @@
++/* -*- mode: c; c-basic-offset: 8; -*-
++ * vim: noexpandtab sw=8 ts=8 sts=0:
++ *
++ * xattr_user.c
++ *
++ * Copyright (C) 2008 Oracle. All rights reserved.
++ *
++ * CREDITS:
++ * Lots of code in this file is taken from ext3.
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public
++ * License as published by the Free Software Foundation; either
++ * version 2 of the License, or (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ * General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public
++ * License along with this program; if not, write to the
++ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
++ * Boston, MA 021110-1307, USA.
++ */
++
++#include <linux/init.h>
++#include <linux/module.h>
++#include <linux/string.h>
++
++#define MLOG_MASK_PREFIX ML_INODE
++#include <cluster/masklog.h>
++
++#include "ocfs2.h"
++#include "alloc.h"
++#include "dlmglue.h"
++#include "file.h"
++#include "ocfs2_fs.h"
++#include "xattr.h"
++
++#define XATTR_USER_PREFIX "user."
++
++static size_t ocfs2_xattr_user_list(struct inode *inode, char *list,
++ size_t list_size, const char *name,
++ size_t name_len)
++{
++ const size_t prefix_len = sizeof(XATTR_USER_PREFIX) - 1;
++ const size_t total_len = prefix_len + name_len + 1;
++ struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
++
++ if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
++ return 0;
++
++ if (list && total_len <= list_size) {
++ memcpy(list, XATTR_USER_PREFIX, prefix_len);
++ memcpy(list + prefix_len, name, name_len);
++ list[prefix_len + name_len] = '\0';
++ }
++ return total_len;
++}
++
++static int ocfs2_xattr_user_get(struct inode *inode, const char *name,
++ void *buffer, size_t size)
++{
++ struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
++
++ if (strcmp(name, "") == 0)
++ return -EINVAL;
++ if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
++ return -EOPNOTSUPP;
++ return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_USER, name,
++ buffer, size);
++}
++
++static int ocfs2_xattr_user_set(struct inode *inode, const char *name,
++ const void *value, size_t size, int flags)
++{
++ struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
++
++ if (strcmp(name, "") == 0)
++ return -EINVAL;
++ if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
++ return -EOPNOTSUPP;
++
++ return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_USER, name, value,
++ size, flags);
++}
++
++struct xattr_handler ocfs2_xattr_user_handler = {
++ .prefix = XATTR_USER_PREFIX,
++ .list = ocfs2_xattr_user_list,
++ .get = ocfs2_xattr_user_get,
++ .set = ocfs2_xattr_user_set,
++};
projects / people / pmueller / ipfire-2.x.git / blobdiff