This patch implement storing extended attributes both in inode or metadata
block.
For EAs in inode, we reserve the last 256 bytes in inode block(blocksize >=
1024).
When EAs value size large than 80 bytes, we will store the value via b-tree
outside inode or block.
Signed-off-by: Tiger Yang <[EMAIL PROTECTED]>
---
fs/ocfs2/Makefile | 2 +
fs/ocfs2/file.c | 5 +
fs/ocfs2/inode.c | 8 +
fs/ocfs2/namei.c | 5 +
fs/ocfs2/ocfs2.h | 1 +
fs/ocfs2/ocfs2_fs.h | 43 ++-
fs/ocfs2/super.c | 12 +
fs/ocfs2/xattr.c | 1342 +++++++++++++++++++++++++++++++++++++++++++++-
fs/ocfs2/xattr.h | 27 +
fs/ocfs2/xattr_trusted.c | 79 +++
fs/ocfs2/xattr_user.c | 91 ++++
11 files changed, 1600 insertions(+), 15 deletions(-)
create mode 100644 fs/ocfs2/xattr_trusted.c
create mode 100644 fs/ocfs2/xattr_user.c
diff --git a/fs/ocfs2/Makefile b/fs/ocfs2/Makefile
index af63980..21323da 100644
--- 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
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index e138fec..b2b96b3 100644
--- 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"
@@ -2070,6 +2071,10 @@ const struct inode_operations ocfs2_file_iops = {
.setattr = ocfs2_setattr,
.getattr = ocfs2_getattr,
.permission = ocfs2_permission,
+ .setxattr = generic_setxattr,
+ .getxattr = generic_getxattr,
+ .listxattr = ocfs2_listxattr,
+ .removexattr = generic_removexattr,
.fallocate = ocfs2_fallocate,
};
diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c
index 7e9e4c7..da4b013 100644
--- 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"
@@ -730,6 +731,13 @@ static int ocfs2_wipe_inode(struct inode *inode,
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,
orphan_dir_bh);
if (status < 0)
diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
index d5d808f..b938b00 100644
--- 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_iops = {
.setattr = ocfs2_setattr,
.getattr = ocfs2_getattr,
.permission = ocfs2_permission,
+ .setxattr = generic_setxattr,
+ .getxattr = generic_getxattr,
+ .listxattr = ocfs2_listxattr,
+ .removexattr = generic_removexattr,
};
diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h
index 3169237..f567215 100644
--- a/fs/ocfs2/ocfs2.h
+++ b/fs/ocfs2/ocfs2.h
@@ -172,6 +172,7 @@ 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
diff --git a/fs/ocfs2/ocfs2_fs.h b/fs/ocfs2/ocfs2_fs.h
index 52c4266..d0fbf38 100644
--- a/fs/ocfs2/ocfs2_fs.h
+++ b/fs/ocfs2/ocfs2_fs.h
@@ -291,6 +291,9 @@ struct ocfs2_new_group_input {
/* Journal limits (in bytes) */
#define OCFS2_MIN_JOURNAL_SIZE (4 * 1024 * 1024)
+/* Inline extended attribute size (in bytes) */
+#define OCFS2_MAX_XATTR_INLINE_SIZE 256
+
/*
* Default local alloc size (in megabytes)
*
@@ -640,11 +643,12 @@ struct ocfs2_dinode {
__le32 i_atime_nsec;
__le32 i_ctime_nsec;
__le32 i_mtime_nsec;
- __le32 i_attr;
+/*70*/ __le32 i_attr;
__le16 i_orphaned_slot; /* Only valid when OCFS2_ORPHANED_FL
was set in i_flags */
__le16 i_dyn_features;
-/*70*/ __le64 i_reserved2[8];
+ __le64 i_xattr_loc;
+/*80*/ __le64 i_reserved2[7];
/*B8*/ union {
__le64 i_pad1; /* Generic way to refer to this
64bit union */
@@ -721,16 +725,26 @@ static inline int ocfs2_fast_symlink_chars(struct
super_block *sb)
static inline int ocfs2_max_inline_data(struct super_block *sb)
{
- return sb->s_blocksize -
- offsetof(struct ocfs2_dinode, id2.i_data.id_data);
+ if (sb->s_blocksize != OCFS2_MIN_BLOCKSIZE)
+ return sb->s_blocksize -
+ offsetof(struct ocfs2_dinode, id2.i_data.id_data) -
+ OCFS2_MAX_XATTR_INLINE_SIZE;
+ else
+ return sb->s_blocksize -
+ offsetof(struct ocfs2_dinode, id2.i_data.id_data);
}
static inline int ocfs2_extent_recs_per_inode(struct super_block *sb)
{
int size;
- size = sb->s_blocksize -
- offsetof(struct ocfs2_dinode, id2.i_list.l_recs);
+ if (sb->s_blocksize != OCFS2_MIN_BLOCKSIZE)
+ size = sb->s_blocksize -
+ offsetof(struct ocfs2_dinode, id2.i_list.l_recs) -
+ OCFS2_MAX_XATTR_INLINE_SIZE;
+ else
+ size = sb->s_blocksize -
+ offsetof(struct ocfs2_dinode, id2.i_list.l_recs);
return size / sizeof(struct ocfs2_extent_rec);
}
@@ -806,15 +820,26 @@ static inline int ocfs2_fast_symlink_chars(int blocksize)
static inline int ocfs2_max_inline_data(int blocksize)
{
- return blocksize - offsetof(struct ocfs2_dinode, id2.i_data.id_data);
+ if (blocksize != OCFS2_MIN_BLOCKSIZE)
+ return blocksize -
+ offsetof(struct ocfs2_dinode, id2.i_data.id_data) -
+ OCFS2_MAX_XATTR_INLINE_SIZE;
+ else
+ return blocksize -
+ offsetof(struct ocfs2_dinode, id2.i_data.id_data);
}
static inline int ocfs2_extent_recs_per_inode(int blocksize)
{
int size;
- size = blocksize -
- offsetof(struct ocfs2_dinode, id2.i_list.l_recs);
+ if (blocksize != OCFS2_MIN_BLOCKSIZE)
+ size = blocksize -
+ offsetof(struct ocfs2_dinode, id2.i_list.l_recs) -
+ OCFS2_MAX_XATTR_INLINE_SIZE;
+ else
+ size = blocksize -
+ offsetof(struct ocfs2_dinode, id2.i_list.l_recs);
return size / sizeof(struct ocfs2_extent_rec);
}
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index df63ba2..2628dbf 100644
--- 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 super_block *sb,
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;
@@ -1375,6 +1386,7 @@ static int ocfs2_initialize_super(struct super_block *sb,
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 */
diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c
index c223ab0..ed07448 100644
--- a/fs/ocfs2/xattr.c
+++ b/fs/ocfs2/xattr.c
@@ -21,6 +21,19 @@
* 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_INODE
#include <cluster/masklog.h>
@@ -28,6 +41,7 @@
#include "alloc.h"
#include "dlmglue.h"
#include "file.h"
+#include "sysfile.h"
#include "inode.h"
#include "journal.h"
#include "ocfs2_fs.h"
@@ -36,6 +50,129 @@
#include "buffer_head_io.h"
#include "xattr.h"
+
+#define OCFS2_XATTR_PAD_BITS 2
+#define OCFS2_XATTR_PAD 4
+#define OCFS2_XATTR_ROUND (OCFS2_XATTR_PAD-1)
+#define OCFS2_XATTR_SIZE(size) (((size) + OCFS2_XATTR_ROUND) & \
+ ~OCFS2_XATTR_ROUND)
+#define OCFS2_XATTR_ROOT_SIZE (sizeof(struct ocfs2_xattr_def_value_root))
+#define OCFS2_XATTR_INLINE_SIZE 80
+#define OCFS2_NAME_HASH_SHIFT 5
+#define OCFS2_VALUE_HASH_SHIFT 16
+
+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_LUSTRE
+ &ocfs2_xattr_lustre_handler,
+#endif
+#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_LUSTRE
+ [OCFS2_XATTR_INDEX_LUSTRE] = &ocfs2_xattr_lustre_handler,
+#endif
+#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;
+ struct buffer_head *xattr_bh;
+ struct ocfs2_xattr_header *header;
+ void *base;
+ void *end;
+ struct ocfs2_xattr_entry *here;
+ int not_found;
+};
+
+static inline u32 ocfs2_blocks_per_cluster(struct super_block *sb)
+{
+ return 1 << (OCFS2_SB(sb)->s_clustersize_bits - sb->s_blocksize_bits);
+}
+
+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(char *prefix,
+ int prefix_len,
+ char *name,
+ int name_len)
+{
+ __u32 hash = 0;
+ int i;
+
+ for (i = 0; i < prefix_len; i++) {
+ hash = (hash << OCFS2_NAME_HASH_SHIFT) ^
+ (hash >> (8*sizeof(hash) - OCFS2_NAME_HASH_SHIFT)) ^
+ *prefix++;
+ }
+
+ for (i = 0; i < name_len; i++) {
+ hash = (hash << OCFS2_NAME_HASH_SHIFT) ^
+ (hash >> (8*sizeof(hash) - OCFS2_NAME_HASH_SHIFT)) ^
+ *name++;
+ }
+ return hash;
+}
+
+/*
+ * ocfs2_xattr_hash_entry()
+ *
+ * Compute the hash of an extended attribute.
+ */
+static void ocfs2_xattr_hash_entry(struct ocfs2_xattr_header *header,
+ struct ocfs2_xattr_entry *entry)
+{
+ __u32 hash = 0;
+ struct xattr_handler *handler = ocfs2_xattr_handler(entry->xe_type);
+ 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(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,
struct buffer_head *xattr_bh,
@@ -50,7 +187,7 @@ static int ocfs2_xattr_extend_allocation(struct inode *inode,
enum ocfs2_alloc_restarted why;
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
struct ocfs2_extent_list *root_el = &xv->xr_list;
- u32 logical_start = le16_to_cpu(xv->xr_clusters);
+ u32 logical_start = le32_to_cpu(xv->xr_clusters);
mlog(0, "(clusters_to_add for xattr= %u)\n", clusters_to_add);
@@ -155,7 +292,9 @@ leave:
static int __ocfs2_remove_xattr_range(struct inode *inode,
struct buffer_head *root_bh,
struct ocfs2_xattr_value_root *xv,
- u32 cpos, u32 phys_cpos, u32 len,
+ u32 cpos,
+ u32 phys_cpos,
+ u32 len,
struct ocfs2_cached_dealloc_ctxt *dealloc)
{
int ret;
@@ -184,9 +323,8 @@ static int __ocfs2_remove_xattr_range(struct inode *inode,
}
handle = ocfs2_start_trans(osb, OCFS2_REMOVE_EXTENT_CREDITS);
- if (handle == NULL) {
- ret = -ENOMEM;
- mlog_errno(ret);
+ if (IS_ERR(handle)) {
+ ret = PTR_ERR(handle);
goto out;
}
@@ -194,7 +332,7 @@ static int __ocfs2_remove_xattr_range(struct inode *inode,
OCFS2_JOURNAL_ACCESS_WRITE);
if (ret) {
mlog_errno(ret);
- goto out;
+ goto out_commit;
}
ret = ocfs2_remove_extent(inode, root_bh, cpos, len, handle, meta_ac,
@@ -299,3 +437,1195 @@ static int ocfs2_xattr_value_truncate(struct inode
*inode,
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;
+ struct ocfs2_xattr_entry *entry;
+ struct xattr_handler *handler = NULL;
+ int i;
+
+ entry = header->xh_entries;
+ for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) {
+ handler = ocfs2_xattr_handler(entry->xe_type);
+
+ 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;
+ }
+ entry += 1;
+ }
+
+ 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;
+ int ret = 0;
+
+ if (!(le16_to_cpu(di->i_dyn_features) & OCFS2_INLINE_XATTR_FL))
+ return ret;
+ header = (struct ocfs2_xattr_header *)
+ ((void *)di + inode->i_sb->s_blocksize -
+ OCFS2_MAX_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;
+ else {
+ ret = ocfs2_read_block(OCFS2_SB(inode->i_sb),
+ le64_to_cpu(di->i_xattr_loc),
+ &blk_bh, OCFS2_BH_CACHED, inode);
+ if (ret)
+ return ret;
+ }
+
+ header = &((struct ocfs2_xattr_block *)blk_bh->b_data)->
+ xb_attrs.xb_header;
+ ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size);
+
+ if (blk_bh)
+ brelse(blk_bh);
+ return ret;
+}
+
+ssize_t ocfs2_listxattr(struct dentry *dentry,
+ char *buffer,
+ size_t size)
+{
+ int ret, i_ret, b_ret;
+ struct buffer_head *di_bh = NULL;
+ struct ocfs2_dinode *di = NULL;
+
+ 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;
+ if (!(le16_to_cpu(di->i_dyn_features) & OCFS2_HAS_XATTR_FL))
+ return 0;
+
+ 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;
+ }
+ ocfs2_inode_unlock(dentry->d_inode, 0);
+
+ if (di_bh)
+ 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 - entry->xe_type;
+ 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_blocks_per_cluster(inode->i_sb);
+ 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_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
+ size_t size;
+ int ret = 0;
+
+ if (!(le16_to_cpu(di->i_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 - OCFS2_MAX_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 (xs->here->xe_local) {
+ 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)
+ 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;
+ size_t size;
+ int ret = -ENODATA;
+
+ if (!di->i_xattr_loc)
+ return ret;
+ else {
+ struct ocfs2_xattr_block *xb;
+
+ ret = ocfs2_read_block(OCFS2_SB(inode->i_sb),
+ le64_to_cpu(di->i_xattr_loc),
+ &blk_bh, OCFS2_BH_CACHED, inode);
+ if (ret)
+ 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 (xs->here->xe_local) {
+ 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)
+ goto cleanup;
+ }
+ }
+ ret = size;
+cleanup:
+ if (blk_bh)
+ brelse(blk_bh);
+ return ret;
+}
+
+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_xattr_search xis = {
+ .not_found = -ENODATA,
+ };
+ struct ocfs2_xattr_search xbs = {
+ .not_found = -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;
+ if (!(le16_to_cpu(di->i_dyn_features) & OCFS2_HAS_XATTR_FL)) {
+ ret = -ENODATA;
+ goto cleanup;
+ }
+
+ 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);
+cleanup:
+ ocfs2_inode_unlock(inode, 0);
+
+ if (di_bh)
+ 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);
+ 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);
+
+ ocfs2_journal_dirty(handle, bh);
+ 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:
+ if (bh)
+ brelse(bh);
+ return ret;
+}
+
+static inline 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_INODE_UPDATE_CREDITS);
+ if (IS_ERR(handle)) {
+ ret = PTR_ERR(handle);
+ 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 (le64_to_cpu(xs->here->xe_value_size) <= OCFS2_XATTR_INLINE_SIZE)
+ xs->here->xe_local = 1;
+ else
+ xs->here->xe_local = 0;
+ ocfs2_xattr_hash_entry(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;
+}
+
+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;
+
+ /* Clear bytes. */
+ 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);
+
+ return ret;
+}
+
+
+
+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);
+ last->xe_type = xi->name_index;
+ if (xi->value_len <= OCFS2_XATTR_INLINE_SIZE)
+ last->xe_local = 1;
+ else
+ last->xe_local = 0;
+ 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. */
+ xs->here->xe_local = 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;
+ xs->here->xe_local = 0;
+ 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 (last->xe_value_size && 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);
+ /* Clear bytes. */
+ 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);
+ xs->here->xe_local = 1;
+ ocfs2_xattr_hash_entry(xs->header, xs->here);
+ }
+ return;
+}
+
+
+static int ocfs2_xattr_set_entry(struct inode *inode,
+ struct ocfs2_xattr_info *xi,
+ struct ocfs2_xattr_search *xs)
+{
+ struct ocfs2_xattr_entry *last;
+ size_t free, min_offs = xs->end - xs->base, name_len = strlen(xi->name);
+ size_t size_l = 0;
+ handle_t *handle = NULL;
+ int 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 and last. */
+ 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 (!xs->not_found) {
+ size_t size = 0;
+ if (xs->here->xe_local)
+ 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));
+ }
+ 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) {
+ 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 (xs->here->xe_local && size == size_l) {
+ ret = ocfs2_xattr_set_value_outside(inode, xi, xs,
+ offs);
+ goto out;
+ } else if (!xs->here->xe_local) {
+ 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) {
+ ret = ocfs2_xattr_value_truncate(inode,
+ xs->xattr_bh,
+ xv,
+ xi->value_len);
+ if (ret < 0)
+ goto out;
+
+ ret = __ocfs2_xattr_set_value_outside(inode,
+ xv,
+ xi->value,
+ xi->value_len);
+ if (ret < 0)
+ goto out;
+
+ ret = ocfs2_xattr_update_entry(inode,
+ xi,
+ xs,
+ offs);
+ goto out;
+ } else
+ ret = ocfs2_xattr_value_truncate(inode,
+ xs->xattr_bh,
+ xv,
+ 0);
+ }
+ }
+
+ handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)),
+ OCFS2_INODE_UPDATE_CREDITS);
+ if (IS_ERR(handle)) {
+ ret = PTR_ERR(handle);
+ goto out;
+ }
+
+ ret = ocfs2_journal_access(handle, inode, xs->xattr_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_commit;
+ }
+
+ ocfs2_xattr_set_entry_local(inode, &xi_l, xs, last, min_offs);
+
+ 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);
+
+ if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
+ size_t offs = le16_to_cpu(xs->here->xe_name_offset);
+ ret = ocfs2_xattr_set_value_outside(inode, xi, xs, offs);
+ }
+
+out:
+ mlog_exit(ret);
+ 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);
+ if (xb_alloc_bh)
+ 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)
+{
+ struct ocfs2_xattr_entry *entry;
+ struct ocfs2_xattr_value_root *xv;
+ void *val;
+ int ret = 0, i;
+
+ entry = header->xh_entries;
+ for (i = 0; i < le16_to_cpu(header->xh_count); i++) {
+ if (!entry->xe_local) {
+ 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);
+ }
+ }
+ 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 -
+ OCFS2_MAX_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_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
+ struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+ handle_t *handle;
+ int ret;
+
+ if (!(le16_to_cpu(di->i_dyn_features) & OCFS2_HAS_XATTR_FL))
+ return 0;
+
+ if (le16_to_cpu(di->i_dyn_features) & OCFS2_INLINE_XATTR_FL) {
+ ret = ocfs2_xattr_ibody_remove(inode, di_bh);
+ if (ret < 0)
+ mlog_errno(ret);
+ }
+ 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)
+ return ret;
+ ret = ocfs2_xattr_block_remove(inode, blk_bh);
+ 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);
+ 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);
+ }
+
+ di->i_dyn_features = cpu_to_le16(le16_to_cpu(di->i_dyn_features) &
+ !OCFS2_INLINE_XATTR_FL &
+ !OCFS2_HAS_XATTR_FL);
+
+ 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:
+ if (blk_bh)
+ brelse(blk_bh);
+ return ret;
+}
+
+static int ocfs2_xattr_update_flag(struct inode *inode,
+ struct buffer_head *di_bh,
+ int flag)
+{
+ struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
+ handle_t *handle = NULL;
+ int ret = 0;
+
+ handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)),
+ OCFS2_INODE_UPDATE_CREDITS);
+ if (IS_ERR(handle)) {
+ ret = PTR_ERR(handle);
+ goto out;
+ }
+ ret = ocfs2_journal_access(handle, inode, di_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_commit;
+ }
+
+ di->i_dyn_features = cpu_to_le16(le16_to_cpu(di->i_dyn_features) |
+ flag);
+ 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:
+ return ret;
+}
+
+static int ocfs2_xattr_ibody_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;
+ int ret;
+
+ if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE)
+ return 0;
+
+ xs->xattr_bh = xs->inode_bh;
+ xs->end = (void *)di + inode->i_sb->s_blocksize;
+ xs->header = (struct ocfs2_xattr_header *)
+ (xs->end - OCFS2_MAX_XATTR_INLINE_SIZE);
+ xs->base = (void *)xs->header;
+ xs->here = xs->header->xh_entries;
+
+ /* Find the named attribute. */
+ if (le16_to_cpu(di->i_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;
+}
+
+static int ocfs2_xattr_ibody_set(struct inode *inode,
+ struct ocfs2_xattr_info *xi,
+ struct ocfs2_xattr_search *xs)
+{
+ 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;
+ ret = ocfs2_xattr_set_entry(inode, xi, xs);
+ if (!ret && !(le16_to_cpu(di->i_dyn_features) & OCFS2_INLINE_XATTR_FL))
+ ret = ocfs2_xattr_update_flag(inode,
+ xs->inode_bh,
+ (OCFS2_INLINE_XATTR_FL |
+ OCFS2_HAS_XATTR_FL));
+
+ return ret;
+}
+
+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) {
+ ret = ocfs2_read_block(OCFS2_SB(inode->i_sb),
+ le64_to_cpu(di->i_xattr_loc),
+ &blk_bh, OCFS2_BH_CACHED, inode);
+ if (ret)
+ return ret;
+ 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)
+ goto cleanup;
+ xs->not_found = ret;
+ return 0;
+ }
+cleanup:
+ if (blk_bh)
+ brelse(blk_bh);
+ return ret;
+}
+
+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_extent_list *el = &di->id2.i_list;
+ struct ocfs2_alloc_context *meta_ac = NULL;
+ handle_t *handle = NULL;
+ struct ocfs2_xattr_block *xblk = NULL;
+ int credits;
+ u16 suballoc_bit_start;
+ u32 num_got;
+ u64 first_blkno;
+ int ret;
+
+ if (!xs->xattr_bh) {
+ ret = ocfs2_reserve_new_metadata(osb, el, &meta_ac);
+ if (ret < 0)
+ goto out;
+
+ credits = ocfs2_calc_extend_credits(osb->sb, el, 1);
+ handle = ocfs2_start_trans(osb, credits);
+ if (IS_ERR(handle)) {
+ ret = PTR_ERR(handle);
+ 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;
+ }
+
+ /* set 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_1);
+ 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)
+ goto out_commit;
+ di->i_xattr_loc = cpu_to_le64(first_blkno);
+ ret = ocfs2_journal_dirty(handle, xs->inode_bh);
+out_commit:
+ ocfs2_commit_trans(osb, handle);
+out:
+ if (meta_ac)
+ ocfs2_free_alloc_context(meta_ac);
+ if (ret < 0)
+ return ret;
+ }
+ ret = ocfs2_xattr_set_entry(inode, xi, xs);
+ if (!ret && !(le16_to_cpu(di->i_dyn_features) & OCFS2_HAS_XATTR_FL))
+ ocfs2_xattr_update_flag(inode,
+ xs->inode_bh,
+ OCFS2_HAS_XATTR_FL);
+
+ return ret;
+}
+
+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;
+ 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) {
+ 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 {
+ ret = ocfs2_xattr_ibody_set(inode, &xi, &xis);
+ if (!ret && !xbs.not_found) {
+ 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;
+ }
+ ret = ocfs2_xattr_block_set(inode, &xi, &xbs);
+ if (ret)
+ goto cleanup;
+ if (!xis.not_found) {
+ xi.value = NULL;
+ xi.value_len = 0;
+ ret = ocfs2_xattr_ibody_set(inode, &xi, &xis);
+ }
+ }
+ }
+cleanup:
+ ocfs2_inode_unlock(inode, 1);
+ if (di_bh)
+ brelse(di_bh);
+ if (xbs.xattr_bh)
+ brelse(xbs.xattr_bh);
+ return ret;
+}
+
diff --git a/fs/ocfs2/xattr.h b/fs/ocfs2/xattr.h
index debde62..0732a00 100644
--- a/fs/ocfs2/xattr.h
+++ b/fs/ocfs2/xattr.h
@@ -77,6 +77,11 @@ struct ocfs2_xattr_tree_root {
/*10*/ struct ocfs2_extent_list xt_list;
};
+struct ocfs2_xattr_def_value_root {
+ struct ocfs2_xattr_value_root xv;
+ struct ocfs2_extent_rec er;
+};
+
#define OCFS2_XATTR_INDEXED 0x1
struct ocfs2_xattr_block {
@@ -95,4 +100,26 @@ struct ocfs2_xattr_block {
} xb_attrs;
};
+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_LUSTRE
+extern struct xattr_handler ocfs2_xattr_lustre_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 */
diff --git a/fs/ocfs2/xattr_trusted.c b/fs/ocfs2/xattr_trusted.c
new file mode 100644
index 0000000..79f70d3
--- /dev/null
+++ b/fs/ocfs2/xattr_trusted.c
@@ -0,0 +1,79 @@
+/* -*- mode: c; c-basic-offset: 8; -*-
+ * vim: noexpandtab sw=8 ts=8 sts=0:
+ *
+ * xattr_trusted.c
+ *
+ * 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.
+ */
+
+#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,
+};
diff --git a/fs/ocfs2/xattr_user.c b/fs/ocfs2/xattr_user.c
new file mode 100644
index 0000000..ef37003
--- /dev/null
+++ b/fs/ocfs2/xattr_user.c
@@ -0,0 +1,91 @@
+/* -*- mode: c; c-basic-offset: 8; -*-
+ * vim: noexpandtab sw=8 ts=8 sts=0:
+ *
+ * xattr_user.c
+ *
+ * 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.
+ */
+
+#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,
+};
--
1.5.4.4
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