#endif
#include <string.h>
#include <time.h>
+#include <errno.h>
+#if defined HAVE_SYS_XATTR_H
+#include <sys/xattr.h>
+#elif defined HAVE_ATTR_XATTR_H
+#include <attr/xattr.h>
+#endif
#include "ext2_fs.h"
#include "ext2_ext_attr.h"
header->h_hash = hash;
}
+/*
+ * Re-compute the extended attribute hash value after an entry has changed.
+ */
+static void ext2fs_attr_rehash(struct ext2_ext_attr_header *header,
+ struct ext2_ext_attr_entry *entry)
+{
+ struct ext2_ext_attr_entry *here;
+ __u32 hash = 0;
+
+ entry->e_hash = ext2fs_ext_attr_hash_entry(entry, (char *)header +
+ entry->e_value_offs);
+
+ here = ENTRY(header+1);
+ while (!EXT2_EXT_IS_LAST_ENTRY(here)) {
+ if (!here->e_hash) {
+ /* Block is not shared if an entry's hash value == 0 */
+ hash = 0;
+ break;
+ }
+ hash = (hash << BLOCK_HASH_SHIFT) ^
+ (hash >> (8*sizeof(hash) - BLOCK_HASH_SHIFT)) ^
+ here->e_hash;
+ here = EXT2_EXT_ATTR_NEXT(here);
+ }
+ header->h_hash = hash;
+}
+
#undef BLOCK_HASH_SHIFT
__u32 ext2fs_get_ea_inode_hash(struct ext2_inode *inode)
if (retval)
goto errout;
- header = (struct ext2_ext_attr_header *) block_buf;
+ header = BHDR(block_buf);
+ if (header->h_magic != EXT2_EXT_ATTR_MAGIC)
+ return EXT2_ET_EA_BAD_MAGIC;
+
header->h_refcount += adjust;
if (newcount)
*newcount = header->h_refcount;
/* Manipulate the contents of extended attribute regions */
struct ext2_xattr {
+ int name_index;
char *name;
+ char *short_name;
void *value;
unsigned int value_len;
ext2_ino_t ea_ino;
/* Keep these names sorted in order of decreasing specificity. */
static struct ea_name_index ea_names[] = {
+ {10, "gnu."},
{3, "system.posix_acl_default"},
{2, "system.posix_acl_access"},
{8, "system.richacl"},
{6, "security."},
+ {5, "lustre."},
{4, "trusted."},
{7, "system."},
{1, "user."},
return NULL;
}
-static int find_ea_index(const char *fullname, char **name, int *index)
+static int find_ea_index(const char *fullname, const char **name, int *index)
{
struct ea_name_index *e;
for (e = ea_names; e->name; e++) {
if (strncmp(fullname, e->name, strlen(e->name)) == 0) {
- *name = (char *)fullname + strlen(e->name);
+ *name = fullname + strlen(e->name);
*index = e->index;
return 1;
}
static errcode_t convert_posix_acl_to_disk_buffer(const void *value, size_t size,
void *out_buf, size_t *size_out)
{
- posix_acl_xattr_header *header = (posix_acl_xattr_header*) value;
- posix_acl_xattr_entry *entry = (posix_acl_xattr_entry *)(header+1), *end;
+ const posix_acl_xattr_header *header =
+ (const posix_acl_xattr_header*) value;
+ const posix_acl_xattr_entry *end, *entry =
+ (const posix_acl_xattr_entry *)(header+1);
ext4_acl_header *ext_acl;
size_t s;
- void *e;
+ char *e;
int count;
{
posix_acl_xattr_header *header;
posix_acl_xattr_entry *entry;
- ext4_acl_header *ext_acl = (ext4_acl_header *) value;
+ const ext4_acl_header *ext_acl = (const ext4_acl_header *) value;
errcode_t err;
const char *cp;
char *out;
header->a_version = ext2fs_cpu_to_le32(POSIX_ACL_XATTR_VERSION);
entry = (posix_acl_xattr_entry *) (out + sizeof(posix_acl_xattr_header));
- cp = value + sizeof(ext4_acl_header);
+ cp = (const char *) value + sizeof(ext4_acl_header);
size -= sizeof(ext4_acl_header);
while (size > 0) {
default:
ext2fs_free_mem(&out);
return EINVAL;
- break;
}
entry++;
}
{
struct ext2_xattr *x;
struct ext2_ext_attr_entry *e = entries_start;
- void *end = entries_start + storage_size;
- char *shortname;
- unsigned int entry_size, value_size;
- int idx, ret;
+ char *end = (char *) entries_start + storage_size;
+ unsigned int value_size;
errcode_t err;
memset(entries_start, 0, storage_size);
for (x = attrs; x < attrs + count; x++) {
- /* Calculate index and shortname position */
- shortname = x->name;
- ret = find_ea_index(x->name, &shortname, &idx);
-
- /* Calculate entry and value size */
- entry_size = (sizeof(*e) + strlen(shortname) +
- EXT2_EXT_ATTR_PAD - 1) &
- ~(EXT2_EXT_ATTR_PAD - 1);
value_size = ((x->value_len + EXT2_EXT_ATTR_PAD - 1) /
EXT2_EXT_ATTR_PAD) * EXT2_EXT_ATTR_PAD;
/* Fill out e appropriately */
- e->e_name_len = strlen(shortname);
- e->e_name_index = (ret ? idx : 0);
+ e->e_name_len = strlen(x->short_name);
+ e->e_name_index = x->name_index;
e->e_value_size = x->value_len;
e->e_value_inum = x->ea_ino;
/* Store name */
- memcpy((char *)e + sizeof(*e), shortname, e->e_name_len);
+ memcpy((char *)e + sizeof(*e), x->short_name, e->e_name_len);
if (x->ea_ino) {
e->e_value_offs = 0;
} else {
end -= value_size;
- e->e_value_offs = end - entries_start +
- value_offset_correction;
+ e->e_value_offs = end - (char *) entries_start +
+ value_offset_correction;
memcpy(end, x->value, e->e_value_size);
}
errcode_t ext2fs_xattrs_write(struct ext2_xattr_handle *handle)
{
ext2_filsys fs = handle->fs;
- const int inode_size = EXT2_INODE_SIZE(fs->super);
+ const unsigned int inode_size = EXT2_INODE_SIZE(fs->super);
struct ext2_inode_large *inode;
char *start, *block_buf = NULL;
struct ext2_ext_attr_header *header;
memcpy(x->name + prefix_len,
(char *)entry + sizeof(*entry),
entry->e_name_len);
+ x->short_name = x->name + prefix_len;
+ x->name_index = entry->e_name_index;
/* Check & copy value */
if (!ext2fs_has_feature_ea_inode(handle->fs->super) &&
memcpy(x->value, value_start + entry->e_value_offs,
entry->e_value_size);
} else {
+ struct ext2_inode *ea_inode;
ext2_file_t ea_file;
if (entry->e_value_offs != 0)
if (err)
return err;
- if (ext2fs_file_get_size(ea_file) !=
- entry->e_value_size)
+ ea_inode = ext2fs_file_get_inode(ea_file);
+ if ((ea_inode->i_flags & EXT4_INLINE_DATA_FL) ||
+ !(ea_inode->i_flags & EXT4_EA_INODE_FL) ||
+ ea_inode->i_links_count == 0)
+ err = EXT2_ET_EA_INODE_CORRUPTED;
+ else if ((__u64) ext2fs_file_get_size(ea_file) !=
+ entry->e_value_size)
err = EXT2_ET_EA_BAD_VALUE_SIZE;
else
err = ext2fs_file_read(ea_file, x->value,
static void xattrs_free_keys(struct ext2_xattr_handle *h)
{
struct ext2_xattr *a = h->attrs;
- size_t i;
+ int i;
for (i = 0; i < h->capacity; i++) {
if (a[i].name)
h->ibody_count = 0;
}
-errcode_t ext2fs_xattrs_read(struct ext2_xattr_handle *handle)
+/* fetch xattrs from an already-loaded inode */
+errcode_t ext2fs_xattrs_read_inode(struct ext2_xattr_handle *handle,
+ struct ext2_inode_large *inode)
{
- struct ext2_inode_large *inode;
+
struct ext2_ext_attr_header *header;
__u32 ea_inode_magic;
unsigned int storage_size;
char *start, *block_buf = NULL;
blk64_t blk;
- size_t i;
errcode_t err;
EXT2_CHECK_MAGIC(handle, EXT2_ET_MAGIC_EA_HANDLE);
- i = EXT2_INODE_SIZE(handle->fs->super);
- if (i < sizeof(*inode))
- i = sizeof(*inode);
- err = ext2fs_get_memzero(i, &inode);
- if (err)
- return err;
-
- err = ext2fs_read_inode_full(handle->fs, handle->ino,
- (struct ext2_inode *)inode,
- EXT2_INODE_SIZE(handle->fs->super));
- if (err)
- goto out;
xattrs_free_keys(handle);
read_ea_block:
/* Look for EA in a separate EA block */
- blk = ext2fs_file_acl_block(handle->fs, (struct ext2_inode *)inode);
+ blk = ext2fs_file_acl_block(handle->fs, EXT2_INODE(inode));
if (blk != 0) {
if ((blk < handle->fs->super->s_first_data_block) ||
(blk >= ext2fs_blocks_count(handle->fs->super))) {
err = read_xattrs_from_buffer(handle, inode,
(struct ext2_ext_attr_entry *) start,
storage_size, block_buf);
- if (err)
- goto out3;
+ }
+out3:
+ if (block_buf)
ext2fs_free_mem(&block_buf);
- }
+out:
+ return err;
+}
- ext2fs_free_mem(&block_buf);
- ext2fs_free_mem(&inode);
- return 0;
+errcode_t ext2fs_xattrs_read(struct ext2_xattr_handle *handle)
+{
+ struct ext2_inode_large *inode;
+ size_t inode_size = EXT2_INODE_SIZE(handle->fs->super);
+ errcode_t err;
+
+ EXT2_CHECK_MAGIC(handle, EXT2_ET_MAGIC_EA_HANDLE);
+
+ if (inode_size < sizeof(*inode))
+ inode_size = sizeof(*inode);
+ err = ext2fs_get_memzero(inode_size, &inode);
+ if (err)
+ return err;
+
+ err = ext2fs_read_inode_full(handle->fs, handle->ino, EXT2_INODE(inode),
+ EXT2_INODE_SIZE(handle->fs->super));
+ if (err)
+ goto out;
+
+ err = ext2fs_xattrs_read_inode(handle, inode);
-out3:
- ext2fs_free_mem(&block_buf);
out:
ext2fs_free_mem(&inode);
+
return err;
}
errcode_t ext2fs_xattrs_iterate(struct ext2_xattr_handle *h,
int (*func)(char *name, char *value,
- size_t value_len, void *data),
+ size_t value_len,
+ ext2_ino_t inode_num, void *data),
void *data)
{
struct ext2_xattr *x;
EXT2_CHECK_MAGIC(h, EXT2_ET_MAGIC_EA_HANDLE);
for (x = h->attrs; x < h->attrs + h->count; x++) {
- ret = func(x->name, x->value, x->value_len, data);
+ ret = func(x->name, x->value, x->value_len, x->ea_ino, data);
if (ret & XATTR_CHANGED)
dirty = 1;
if (ret & XATTR_ABORT)
}
static errcode_t xattr_update_entry(ext2_filsys fs, struct ext2_xattr *x,
- const char *name, const void *value,
+ const char *name, const char *short_name,
+ int index, const void *value,
size_t value_len, int in_inode)
{
ext2_ino_t ea_ino = 0;
goto fail;
}
- if (!x->name)
+ if (!x->name) {
x->name = new_name;
+ x->short_name = new_name + (short_name - name);
+ }
+ x->name_index = index;
if (x->value)
ext2fs_free_mem(&x->value);
}
static int xattr_find_position(struct ext2_xattr *attrs, int count,
- const char *name)
+ const char *shortname, int name_idx)
{
struct ext2_xattr *x;
int i;
- char *shortname, *x_shortname;
- int name_idx, x_name_idx;
int shortname_len, x_shortname_len;
- find_ea_index(name, &shortname, &name_idx);
shortname_len = strlen(shortname);
for (i = 0, x = attrs; i < count; i++, x++) {
- find_ea_index(x->name, &x_shortname, &x_name_idx);
- if (name_idx < x_name_idx)
+ if (name_idx < x->name_index)
break;
- if (name_idx > x_name_idx)
+ if (name_idx > x->name_index)
continue;
- x_shortname_len = strlen(x_shortname);
+ x_shortname_len = strlen(x->short_name);
if (shortname_len < x_shortname_len)
break;
if (shortname_len > x_shortname_len)
continue;
- if (memcmp(shortname, x_shortname, shortname_len) <= 0)
+ if (memcmp(shortname, x->short_name, shortname_len) <= 0)
break;
}
return i;
}
-errcode_t xattr_array_update(struct ext2_xattr_handle *h, const char *name,
- const void *value, size_t value_len, int ibody_free,
- int block_free, int old_idx, int in_inode)
+static errcode_t xattr_array_update(struct ext2_xattr_handle *h,
+ const char *name,
+ const void *value, size_t value_len,
+ int ibody_free, int block_free,
+ int old_idx, int in_inode)
{
struct ext2_xattr tmp;
int add_to_ibody;
int needed;
- int name_len, name_idx;
- char *shortname;
+ int name_len, name_idx = 0;
+ const char *shortname = name;
int new_idx;
int ret;
/* Update the existing entry. */
ret = xattr_update_entry(h->fs, &h->attrs[old_idx], name,
- value, value_len, in_inode);
+ shortname, name_idx, value,
+ value_len, in_inode);
if (ret)
return ret;
if (h->ibody_count <= old_idx) {
if (old_idx >= 0) {
/* Update the existing entry. */
ret = xattr_update_entry(h->fs, &h->attrs[old_idx], name,
- value, value_len, in_inode);
+ shortname, name_idx, value,
+ value_len, in_inode);
if (ret)
return ret;
if (old_idx < h->ibody_count) {
* entries in the block are sorted.
*/
new_idx = xattr_find_position(h->attrs + h->ibody_count,
- h->count - h->ibody_count, name);
+ h->count - h->ibody_count,
+ shortname, name_idx);
new_idx += h->ibody_count - 1;
tmp = h->attrs[old_idx];
memmove(h->attrs + old_idx, h->attrs + old_idx + 1,
}
new_idx = xattr_find_position(h->attrs + h->ibody_count,
- h->count - h->ibody_count, name);
+ h->count - h->ibody_count,
+ shortname, name_idx);
new_idx += h->ibody_count;
add_to_ibody = 0;
return ret;
}
- ret = xattr_update_entry(h->fs, &h->attrs[h->count], name, value,
- value_len, in_inode);
+ ret = xattr_update_entry(h->fs, &h->attrs[h->count], name, shortname,
+ name_idx, value, value_len, in_inode);
if (ret)
return ret;
return 0;
}
-int space_used(struct ext2_xattr *attrs, int count)
+static int space_used(struct ext2_xattr *attrs, int count)
{
int total = 0;
struct ext2_xattr *x;
- char *shortname;
- int i, len, name_idx;
+ int i, len;
for (i = 0, x = attrs; i < count; i++, x++) {
- find_ea_index(x->name, &shortname, &name_idx);
- len = strlen(shortname);
+ len = strlen(x->short_name);
total += EXT2_EXT_ATTR_LEN(len);
if (!x->ea_ino)
total += EXT2_EXT_ATTR_SIZE(x->value_len);
new_value, &value_len);
if (ret)
goto out;
- } else
+ } else if (value_len)
memcpy(new_value, value, value_len);
/* Imitate kernel behavior by skipping update if value is the same. */
for (x = h->attrs; x < h->attrs + h->count; x++) {
if (!strcmp(x->name, name)) {
if (!x->ea_ino && x->value_len == value_len &&
- !memcmp(x->value, new_value, value_len)) {
+ (!value_len ||
+ !memcmp(x->value, new_value, value_len))) {
ret = 0;
goto out;
}
ret = EXT2_ET_FILESYSTEM_CORRUPTED;
goto out;
}
- ret = xattr_array_update(h, name, value, value_len, ibody_free,
+ ret = xattr_array_update(h, name, new_value, value_len,
+ ibody_free,
0 /* block_free */, old_idx,
0 /* in_inode */);
if (ret)
value_len > EXT4_XATTR_MIN_LARGE_EA_SIZE(fs->blocksize))
in_inode = 1;
- ret = xattr_array_update(h, name, value, value_len, ibody_free,
+ ret = xattr_array_update(h, name, new_value, value_len, ibody_free,
block_free, old_idx, in_inode);
if (ret == EXT2_ET_EA_NO_SPACE && !in_inode &&
ext2fs_has_feature_ea_inode(fs->super))
- ret = xattr_array_update(h, name, value, value_len, ibody_free,
- block_free, old_idx, 1 /* in_inode */);
+ ret = xattr_array_update(h, name, new_value, value_len,
+ ibody_free, block_free, old_idx, 1 /* in_inode */);
if (ret)
goto out;
handle->flags = *new_flags;
return 0;
}
+
+struct ext2_attr_info {
+ int name_index;
+ const char *name;
+ const char *value;
+ int value_len;
+};
+
+struct ext2_attr_search {
+ struct ext2_ext_attr_entry *first;
+ char *base;
+ char *end;
+ struct ext2_ext_attr_entry *here;
+ int not_found;
+};
+
+struct ext2_attr_ibody_find {
+ ext2_ino_t ino;
+ struct ext2_attr_search s;
+};
+
+struct ext2_attr_block_find {
+ struct ext2_attr_search s;
+ char *block;
+};
+
+void ext2fs_attr_shift_entries(struct ext2_ext_attr_entry *entry,
+ int value_offs_shift, char *to,
+ char *from, int n)
+{
+ struct ext2_ext_attr_entry *last = entry;
+
+ /* Adjust the value offsets of the entries */
+ for (; !EXT2_EXT_IS_LAST_ENTRY(last); last = EXT2_EXT_ATTR_NEXT(last)) {
+ if (!last->e_value_inum && last->e_value_size) {
+ last->e_value_offs = last->e_value_offs +
+ value_offs_shift;
+ }
+ }
+ /* Shift the entries by n bytes and zero freed space in inode */
+ memmove(to, from, n);
+ if (to > from)
+ memset(from, 0, to - from);
+}
+
+/*
+ * This function returns the free space present in the inode or the EA block.
+ * total is number of bytes taken up by the EA entries and is used to shift
+ * the EAs in ext2fs_expand_extra_isize().
+ */
+int ext2fs_attr_free_space(struct ext2_ext_attr_entry *last,
+ int *min_offs, char *base, int *total)
+{
+ for (; !EXT2_EXT_IS_LAST_ENTRY(last); last = EXT2_EXT_ATTR_NEXT(last)) {
+ *total += EXT2_EXT_ATTR_LEN(last->e_name_len);
+ if (!last->e_value_inum && last->e_value_size) {
+ int offs = last->e_value_offs;
+ if (offs < *min_offs)
+ *min_offs = offs;
+ }
+ }
+
+ return *min_offs - ((char *)last - base) - sizeof(__u32);
+}
+
+static errcode_t ext2fs_attr_check_names(struct ext2_ext_attr_entry *entry,
+ char *end)
+{
+ while (!EXT2_EXT_IS_LAST_ENTRY(entry)) {
+ struct ext2_ext_attr_entry *next = EXT2_EXT_ATTR_NEXT(entry);
+ if ((char *)next >= end)
+ return EXT2_ET_EA_BAD_ENTRIES;
+ entry = next;
+ }
+ return 0;
+}
+
+/* The unused parameter used to be the blocksize, but with in-inode xattrs
+ * the xattr storage area size depends on where the xattrs are kept. Keep
+ * this parameter for API/ABI compatibility, but it is not needed. */
+static errcode_t ext2fs_attr_find_entry(struct ext2_ext_attr_entry **pentry,
+ int name_index, const char *name,
+ int unused, int sorted)
+{
+ struct ext2_ext_attr_entry *entry;
+ int name_len;
+ int cmp = 1;
+
+ if (name == NULL)
+ return EXT2_ET_EA_BAD_NAME;
+
+ name_len = strlen(name);
+ entry = *pentry;
+ for (; !EXT2_EXT_IS_LAST_ENTRY(entry);
+ entry = EXT2_EXT_ATTR_NEXT(entry)) {
+ cmp = name_index - entry->e_name_index;
+ if (!cmp)
+ cmp = name_len - entry->e_name_len;
+ if (!cmp)
+ cmp = memcmp(name, entry->e_name, name_len);
+ if (cmp <= 0 && (sorted || cmp == 0))
+ break;
+ }
+ *pentry = entry;
+
+ return cmp ? EXT2_ET_EA_NAME_NOT_FOUND : 0;
+}
+
+static errcode_t ext2fs_attr_block_find(ext2_filsys fs,struct ext2_inode *inode,
+ struct ext2_attr_info *i,
+ struct ext2_attr_block_find *bs)
+{
+ struct ext2_ext_attr_header *header;
+ errcode_t error;
+
+ if (inode->i_file_acl) {
+ /* The inode already has an extended attribute block. */
+ error = ext2fs_get_mem(fs->blocksize, &bs->block);
+ if (error)
+ return error;
+ error = ext2fs_read_ext_attr(fs, inode->i_file_acl, bs->block);
+ if (error)
+ goto cleanup;
+
+ header = BHDR(bs->block);
+ if (header->h_magic != EXT2_EXT_ATTR_MAGIC) {
+ error = EXT2_ET_EA_BAD_MAGIC;
+ goto cleanup;
+ }
+
+ /* Find the named attribute. */
+ bs->s.base = bs->block;
+ bs->s.first = (struct ext2_ext_attr_entry *)(header + 1);
+ bs->s.end = bs->block + fs->blocksize;
+ bs->s.here = bs->s.first;
+ error = ext2fs_attr_find_entry(&bs->s.here, i->name_index,
+ i->name, fs->blocksize, 1);
+ if (error && error != EXT2_ET_EA_NAME_NOT_FOUND)
+ goto cleanup;
+ bs->s.not_found = error;
+ }
+ error = 0;
+
+cleanup:
+ if (error && bs->block)
+ ext2fs_free_mem(&bs->block);
+ return error;
+}
+
+static errcode_t ext2fs_attr_ibody_find(ext2_filsys fs,
+ struct ext2_inode_large *inode,
+ struct ext2_attr_info *i,
+ struct ext2_attr_ibody_find *is)
+{
+ errcode_t error;
+
+ if (EXT2_INODE_SIZE(fs->super) == EXT2_GOOD_OLD_INODE_SIZE)
+ return 0;
+
+ if (inode->i_extra_isize == 0)
+ return 0;
+
+ is->s.first = &IHDR(inode)->h_first_entry[0];
+ is->s.base = (char *)is->s.first;
+ is->s.here = is->s.first;
+ is->s.end = (char *)inode + EXT2_INODE_SIZE(fs->super);
+ if (IHDR(inode)->h_magic == EXT2_EXT_ATTR_MAGIC) {
+ error = ext2fs_attr_check_names(is->s.first, is->s.end);
+ if (error)
+ return error;
+ /* Find the named attribute. */
+ error = ext2fs_attr_find_entry(&is->s.here, i->name_index,
+ i->name, is->s.end -
+ (char *)is->s.base, 0);
+ if (error && error != EXT2_ET_EA_NAME_NOT_FOUND)
+ return error;
+ is->s.not_found = error;
+ }
+
+ return 0;
+}
+
+static errcode_t ext2fs_attr_set_entry(ext2_filsys fs, struct ext2_attr_info *i,
+ struct ext2_attr_search *s)
+{
+ struct ext2_ext_attr_entry *last;
+ int free, min_offs = s->end - s->base, name_len = strlen(i->name);
+
+ /* Compute min_offs and last. */
+ for (last = s->first; !EXT2_EXT_IS_LAST_ENTRY(last);
+ last = EXT2_EXT_ATTR_NEXT(last)) {
+ if (!last->e_value_inum && last->e_value_size) {
+ int offs = last->e_value_offs;
+
+ if (offs < min_offs)
+ min_offs = offs;
+ }
+ }
+ free = min_offs - ((char *)last - s->base) - sizeof(__u32);
+
+ if (!s->not_found) {
+ if (!s->here->e_value_inum && s->here->e_value_size) {
+ int size = s->here->e_value_size;
+ free += EXT2_EXT_ATTR_SIZE(size);
+ }
+ free += EXT2_EXT_ATTR_LEN(name_len);
+ }
+ if (i->value) {
+ if (free < EXT2_EXT_ATTR_LEN(name_len) +
+ EXT2_EXT_ATTR_SIZE(i->value_len))
+ return EXT2_ET_EA_NO_SPACE;
+ }
+
+ if (i->value && s->not_found) {
+ /* Insert the new name. */
+ int size = EXT2_EXT_ATTR_LEN(name_len);
+ int rest = (char *)last - (char *)s->here + sizeof(__u32);
+
+ memmove((char *)s->here + size, s->here, rest);
+ memset(s->here, 0, size);
+ s->here->e_name_index = i->name_index;
+ s->here->e_name_len = name_len;
+ memcpy(s->here->e_name, i->name, name_len);
+ } else {
+ if (!s->here->e_value_inum && s->here->e_value_size) {
+ char *first_val = s->base + min_offs;
+ int offs = s->here->e_value_offs;
+ char *val = s->base + offs;
+ int size = EXT2_EXT_ATTR_SIZE(s->here->e_value_size);
+
+ if (i->value &&
+ size == EXT2_EXT_ATTR_SIZE(i->value_len)) {
+ /* The old and the new value have the same
+ size. Just replace. */
+ s->here->e_value_size = i->value_len;
+ memset(val + size - EXT2_EXT_ATTR_PAD, 0,
+ EXT2_EXT_ATTR_PAD); /* Clear pad bytes */
+ memcpy(val, i->value, i->value_len);
+ return 0;
+ }
+
+ /* Remove the old value. */
+ memmove(first_val + size, first_val, val - first_val);
+ memset(first_val, 0, size);
+ s->here->e_value_size = 0;
+ s->here->e_value_offs = 0;
+ min_offs += size;
+
+ /* Adjust all value offsets. */
+ last = s->first;
+ while (!EXT2_EXT_IS_LAST_ENTRY(last)) {
+ int o = last->e_value_offs;
+
+ if (!last->e_value_inum &&
+ last->e_value_size && o < offs)
+ last->e_value_offs = o + size;
+ last = EXT2_EXT_ATTR_NEXT(last);
+ }
+ }
+ if (!i->value) {
+ /* Remove the old name. */
+ int size = EXT2_EXT_ATTR_LEN(name_len);
+
+ last = ENTRY((char *)last - size);
+ memmove((char *)s->here, (char *)s->here + size,
+ (char *)last - (char *)s->here + sizeof(__u32));
+ memset(last, 0, size);
+ }
+ }
+
+ if (i->value) {
+ /* Insert the new value. */
+ s->here->e_value_size = i->value_len;
+ if (i->value_len) {
+ int size = EXT2_EXT_ATTR_SIZE(i->value_len);
+ char *val = s->base + min_offs - size;
+
+ s->here->e_value_offs = min_offs - size;
+ memset(val + size - EXT2_EXT_ATTR_PAD, 0,
+ EXT2_EXT_ATTR_PAD); /* Clear the pad bytes. */
+ memcpy(val, i->value, i->value_len);
+ }
+ }
+
+ return 0;
+}
+
+static errcode_t ext2fs_attr_block_set(ext2_filsys fs, struct ext2_inode *inode,
+ struct ext2_attr_info *i,
+ struct ext2_attr_block_find *bs)
+{
+ struct ext2_attr_search *s = &bs->s;
+ char *new_buf = NULL, *old_block = NULL;
+ blk_t blk;
+ int clear_flag = 0;
+ errcode_t error;
+
+ if (i->value && i->value_len > fs->blocksize)
+ return EXT2_ET_EA_NO_SPACE;
+
+ if (s->base) {
+ if (BHDR(s->base)->h_refcount != 1) {
+ int offset = (char *)s->here - bs->block;
+
+ /* Decrement the refcount of the shared block */
+ old_block = s->base;
+ BHDR(s->base)->h_refcount -= 1;
+
+ error = ext2fs_get_mem(fs->blocksize, &s->base);
+ if (error)
+ goto cleanup;
+ clear_flag = 1;
+ memcpy(s->base, bs->block, fs->blocksize);
+ s->first = ENTRY(BHDR(s->base)+1);
+ BHDR(s->base)->h_refcount = 1;
+ s->here = ENTRY(s->base + offset);
+ s->end = s->base + fs->blocksize;
+ }
+ } else {
+ error = ext2fs_get_mem(fs->blocksize, &s->base);
+ if (error)
+ goto cleanup;
+ clear_flag = 1;
+ memset(s->base, 0, fs->blocksize);
+ BHDR(s->base)->h_magic = EXT2_EXT_ATTR_MAGIC;
+ BHDR(s->base)->h_blocks = 1;
+ BHDR(s->base)->h_refcount = 1;
+ s->first = ENTRY(BHDR(s->base)+1);
+ s->here = ENTRY(BHDR(s->base)+1);
+ s->end = s->base + fs->blocksize;
+ }
+
+ error = ext2fs_attr_set_entry(fs, i, s);
+ if (error)
+ goto cleanup;
+
+ if (!EXT2_EXT_IS_LAST_ENTRY(s->first))
+ ext2fs_attr_rehash(BHDR(s->base), s->here);
+
+ if (!EXT2_EXT_IS_LAST_ENTRY(s->first)) {
+ if (bs->block && bs->block == s->base) {
+ /* We are modifying this block in-place */
+ new_buf = bs->block;
+ blk = inode->i_file_acl;
+ error = ext2fs_write_ext_attr(fs, blk, s->base);
+ if (error)
+ goto cleanup;
+ } else {
+ /* We need to allocate a new block */
+ error = ext2fs_new_block(fs, 0, 0, &blk);
+ if (error)
+ goto cleanup;
+ ext2fs_block_alloc_stats(fs, blk, 1);
+ error = ext2fs_write_ext_attr(fs, blk, s->base);
+ if (error)
+ goto cleanup;
+ new_buf = s->base;
+ if (old_block) {
+ BHDR(s->base)->h_refcount -= 1;
+ error = ext2fs_write_ext_attr(fs,
+ inode->i_file_acl,
+ s->base);
+ if (error)
+ goto cleanup;
+ }
+ }
+ }
+
+ /* Update the i_blocks if we added a new EA block */
+ if (!inode->i_file_acl && new_buf)
+ inode->i_blocks += fs->blocksize / 512;
+ /* Update the inode. */
+ inode->i_file_acl = new_buf ? blk : 0;
+
+cleanup:
+ if (clear_flag)
+ ext2fs_free_mem(&s->base);
+ return 0;
+}
+
+static errcode_t ext2fs_attr_ibody_set(ext2_filsys fs,
+ struct ext2_inode_large *inode,
+ struct ext2_attr_info *i,
+ struct ext2_attr_ibody_find *is)
+{
+ struct ext2_attr_search *s = &is->s;
+ errcode_t error;
+
+ if (EXT2_INODE_SIZE(fs->super) == EXT2_GOOD_OLD_INODE_SIZE)
+ return EXT2_ET_EA_NO_SPACE;
+
+ error = ext2fs_attr_set_entry(fs, i, s);
+ if (error)
+ return error;
+
+ if (!EXT2_EXT_IS_LAST_ENTRY(s->first))
+ IHDR(inode)->h_magic = EXT2_EXT_ATTR_MAGIC;
+ else
+ IHDR(inode)->h_magic = 0;
+
+ return ext2fs_write_inode_full(fs, is->ino, (struct ext2_inode *)inode,
+ EXT2_INODE_SIZE(fs->super));
+}
+
+static struct {
+ char str[28];
+ int len;
+} ext2_attr_index_prefix[] = {
+ [EXT2_ATTR_INDEX_USER] = { EXT2_ATTR_INDEX_USER_PREFIX,
+ sizeof(EXT2_ATTR_INDEX_USER_PREFIX) },
+ [EXT2_ATTR_INDEX_POSIX_ACL_ACCESS] = {
+ EXT2_ATTR_INDEX_POSIX_ACL_ACCESS_PREFIX,
+ sizeof(EXT2_ATTR_INDEX_POSIX_ACL_ACCESS_PREFIX) },
+ [EXT2_ATTR_INDEX_POSIX_ACL_DEFAULT] = {
+ EXT2_ATTR_INDEX_POSIX_ACL_DEFAULT_PREFIX,
+ sizeof(EXT2_ATTR_INDEX_POSIX_ACL_DEFAULT_PREFIX) },
+ [EXT2_ATTR_INDEX_TRUSTED] = { EXT2_ATTR_INDEX_TRUSTED_PREFIX,
+ sizeof(EXT2_ATTR_INDEX_TRUSTED_PREFIX) },
+ [EXT2_ATTR_INDEX_LUSTRE] = { EXT2_ATTR_INDEX_LUSTRE_PREFIX,
+ sizeof(EXT2_ATTR_INDEX_LUSTRE_PREFIX) },
+ [EXT2_ATTR_INDEX_SECURITY] = { EXT2_ATTR_INDEX_SECURITY_PREFIX,
+ sizeof(EXT2_ATTR_INDEX_SECURITY_PREFIX)},
+ { "", 0 }
+};
+
+errcode_t ext2fs_attr_set(ext2_filsys fs, ext2_ino_t ino,
+ struct ext2_inode *inode,
+ int name_index, const char *name, const char *value,
+ int value_len, int flags)
+{
+ struct ext2_inode_large *inode_large = NULL;
+ struct ext2_attr_info i = {
+ .name_index = name_index,
+ .name = name,
+ .value = value,
+ .value_len = value_len,
+ };
+ struct ext2_attr_ibody_find is = {
+ .ino = ino,
+ .s = { .not_found = -ENODATA, },
+ };
+ struct ext2_attr_block_find bs = {
+ .s = { .not_found = -ENODATA, },
+ };
+ errcode_t error;
+
+ if (!name)
+ return EXT2_ET_EA_BAD_NAME;
+ if (strlen(name) > 255)
+ return EXT2_ET_EA_NAME_TOO_BIG;
+
+ /* If the prefix is still present, skip it */
+ if (strncmp(name, ext2_attr_index_prefix[name_index].str,
+ ext2_attr_index_prefix[name_index].len) == 0)
+ i.name += ext2_attr_index_prefix[name_index].len;
+
+ if (EXT2_INODE_SIZE(fs->super) > EXT2_GOOD_OLD_INODE_SIZE) {
+ inode_large = (struct ext2_inode_large *)inode;
+
+ error = ext2fs_attr_ibody_find(fs, inode_large, &i, &is);
+ if (error)
+ goto cleanup;
+ }
+ if (is.s.not_found) {
+ error = ext2fs_attr_block_find(fs, inode, &i, &bs);
+ if (error)
+ goto cleanup;
+ }
+
+ if (is.s.not_found && bs.s.not_found) {
+ error = EXT2_ET_EA_NAME_NOT_FOUND;
+ if (flags & XATTR_REPLACE)
+ goto cleanup;
+ error = 0;
+ if (!value)
+ goto cleanup;
+ } else {
+ error = EXT2_ET_EA_NAME_EXISTS;
+ if (flags & XATTR_CREATE)
+ goto cleanup;
+ }
+
+ if (!value) {
+ if (!is.s.not_found &&
+ (EXT2_INODE_SIZE(fs->super) > EXT2_GOOD_OLD_INODE_SIZE))
+ error = ext2fs_attr_ibody_set(fs, inode_large, &i, &is);
+ else if (!bs.s.not_found)
+ error = ext2fs_attr_block_set(fs, inode, &i, &bs);
+ } else {
+ if (EXT2_INODE_SIZE(fs->super) > EXT2_GOOD_OLD_INODE_SIZE)
+ error = ext2fs_attr_ibody_set(fs, inode_large, &i, &is);
+ if (!error && !bs.s.not_found) {
+ i.value = NULL;
+ error = ext2fs_attr_block_set(fs, inode, &i, &bs);
+ } else if (error == EXT2_ET_EA_NO_SPACE) {
+ error = ext2fs_attr_block_set(fs, inode, &i, &bs);
+ if (error)
+ goto cleanup;
+ if (!is.s.not_found) {
+ i.value = NULL;
+ if (EXT2_INODE_SIZE(fs->super) >
+ EXT2_GOOD_OLD_INODE_SIZE)
+ error = ext2fs_attr_ibody_set(fs,
+ inode_large, &i, &is);
+ }
+ }
+ }
+
+cleanup:
+ return error;
+}
+
+static errcode_t ext2fs_attr_check_block(ext2_filsys fs, char *buffer)
+{
+ if (BHDR(buffer)->h_magic != (EXT2_EXT_ATTR_MAGIC) ||
+ BHDR(buffer)->h_blocks != 1)
+ return EXT2_ET_EA_BAD_MAGIC;
+
+ return ext2fs_attr_check_names((struct ext2_ext_attr_entry *)
+ (BHDR(buffer) + 1),
+ buffer + fs->blocksize);
+}
+
+static errcode_t ext2fs_attr_block_get(ext2_filsys fs, struct ext2_inode *inode,
+ int name_index, const char *name,
+ void *buffer, size_t buffer_size,
+ int *easize)
+{
+ struct ext2_ext_attr_header *header = NULL;
+ struct ext2_ext_attr_entry *entry;
+ char *block_buf = NULL;
+ errcode_t error;
+
+ error = EXT2_ET_EA_NAME_NOT_FOUND;
+ if (!inode->i_file_acl)
+ goto cleanup;
+
+ error = ext2fs_get_mem(fs->blocksize, &block_buf);
+ if (error)
+ return error;
+ error = ext2fs_read_ext_attr(fs, inode->i_file_acl, block_buf);
+ if (error)
+ goto cleanup;
+
+ error = ext2fs_attr_check_block(fs, block_buf);
+ if (error)
+ goto cleanup;
+
+ header = BHDR(block_buf);
+ entry = (struct ext2_ext_attr_entry *)(header + 1);
+ error = ext2fs_attr_find_entry(&entry, name_index, name,
+ fs->blocksize, 1);
+ if (error)
+ goto cleanup;
+ if (easize)
+ *easize = entry->e_value_size;
+ if (buffer) {
+ if (entry->e_value_size > buffer_size) {
+ error = EXT2_ET_EA_TOO_BIG;
+ goto cleanup;
+ }
+ memcpy(buffer, block_buf + entry->e_value_offs,
+ entry->e_value_size);
+ error = 0;
+ }
+
+cleanup:
+ if (block_buf)
+ ext2fs_free_mem(&block_buf);
+ return error;
+}
+
+static errcode_t ext2fs_attr_check_ibody(ext2_filsys fs,
+ struct ext2_inode_large *inode)
+{
+ const int inode_size = EXT2_INODE_SIZE(fs->super);
+
+ if (inode_size == EXT2_GOOD_OLD_INODE_SIZE)
+ return EXT2_ET_EA_NAME_NOT_FOUND;
+
+ if (IHDR(inode)->h_magic != EXT2_EXT_ATTR_MAGIC)
+ return EXT2_ET_EA_BAD_MAGIC;
+
+ return ext2fs_attr_check_names(&IHDR(inode)->h_first_entry[0],
+ (char *)inode + inode_size);
+}
+
+
+static errcode_t ext2fs_attr_ibody_get(ext2_filsys fs,
+ struct ext2_inode_large *inode,
+ int name_index, const char *name,
+ void *buffer, size_t buffer_size,
+ int *easize)
+{
+ struct ext2_ext_attr_entry *entry;
+ int error;
+
+ error = ext2fs_attr_check_ibody(fs, inode);
+ if (error)
+ return error;
+
+ entry = &IHDR(inode)->h_first_entry[0];
+
+ error = ext2fs_attr_find_entry(&entry, name_index, name,
+ (char *)inode + EXT2_INODE_SIZE(fs->super) -
+ (char *)entry, 0);
+ if (error)
+ goto cleanup;
+ if (easize)
+ *easize = entry->e_value_size;
+ if (buffer) {
+ if (entry->e_value_size > buffer_size) {
+ error = EXT2_ET_EA_TOO_BIG;
+ goto cleanup;
+ }
+ memcpy(buffer, (char *)&IHDR(inode)->h_first_entry[0] +
+ entry->e_value_offs, entry->e_value_size);
+ }
+
+cleanup:
+ return error;
+}
+
+
+errcode_t ext2fs_attr_get(ext2_filsys fs, struct ext2_inode *inode,
+ int name_index, const char *name, char *buffer,
+ size_t buffer_size, int *easize)
+{
+ errcode_t error;
+
+ error = ext2fs_attr_ibody_get(fs, (struct ext2_inode_large *)inode,
+ name_index, name, buffer, buffer_size,
+ easize);
+ if (error == EXT2_ET_EA_NAME_NOT_FOUND || error == EXT2_ET_EA_BAD_MAGIC)
+ error = ext2fs_attr_block_get(fs, inode, name_index, name,
+ buffer, buffer_size, easize);
+
+ return error;
+}
+
+int ext2fs_attr_get_next_attr(struct ext2_ext_attr_entry *entry, int name_index,
+ char *buffer, int buffer_size, int start)
+{
+ const int prefix_len = ext2_attr_index_prefix[name_index].len;
+ int total_len;
+
+ if (!start && !EXT2_EXT_IS_LAST_ENTRY(entry))
+ entry = EXT2_EXT_ATTR_NEXT(entry);
+
+ for (; !EXT2_EXT_IS_LAST_ENTRY(entry);
+ entry = EXT2_EXT_ATTR_NEXT(entry)) {
+ if (!name_index)
+ break;
+ if (name_index == entry->e_name_index)
+ break;
+ }
+ if (EXT2_EXT_IS_LAST_ENTRY(entry))
+ return 0;
+
+ total_len = prefix_len + entry->e_name_len + 1;
+ if (buffer && total_len <= buffer_size) {
+ memcpy(buffer, ext2_attr_index_prefix[name_index].str,
+ prefix_len);
+ memcpy(buffer + prefix_len, entry->e_name, entry->e_name_len);
+ buffer[prefix_len + entry->e_name_len] = '\0';
+ }
+
+ return total_len;
+}
+
+errcode_t ext2fs_expand_extra_isize(ext2_filsys fs, ext2_ino_t ino,
+ struct ext2_inode_large *inode,
+ int new_extra_isize, int *ret,
+ int *needed_size)
+{
+ struct ext2_inode *inode_buf = NULL;
+ struct ext2_ext_attr_header *header = NULL;
+ struct ext2_ext_attr_entry *entry = NULL, *last = NULL;
+ struct ext2_attr_ibody_find is = {
+ .ino = ino,
+ .s = { .not_found = EXT2_ET_EA_NO_SPACE, },
+ };
+ struct ext2_attr_block_find bs = {
+ .s = { .not_found = EXT2_ET_EA_NO_SPACE, },
+ };
+ char *start, *end, *block_buf = NULL, *buffer =NULL, *b_entry_name=NULL;
+ int total_ino = 0, total_blk, free, offs, tried_min_extra_isize = 0;
+ int s_min_extra_isize = fs->super->s_min_extra_isize;
+ errcode_t error = 0;
+
+ if (needed_size)
+ *needed_size = new_extra_isize;
+ error = ext2fs_get_mem(fs->blocksize, &block_buf);
+ if (error)
+ return error;
+
+ if (inode == NULL) {
+ error = ext2fs_get_mem(EXT2_INODE_SIZE(fs->super), &inode_buf);
+ if (error)
+ goto cleanup;
+
+ error = ext2fs_read_inode_full(fs, ino, inode_buf,
+ EXT2_INODE_SIZE(fs->super));
+ if (error)
+ goto cleanup;
+
+ inode = (struct ext2_inode_large *)inode_buf;
+ }
+
+retry:
+ if (inode->i_extra_isize >= new_extra_isize)
+ goto cleanup;
+
+ start = (char *)inode + EXT2_GOOD_OLD_INODE_SIZE + inode->i_extra_isize;
+ /* No extended attributes present */
+ if (IHDR(inode)->h_magic != EXT2_EXT_ATTR_MAGIC) {
+ memset(start, 0,
+ EXT2_INODE_SIZE(fs->super) - EXT2_GOOD_OLD_INODE_SIZE -
+ inode->i_extra_isize);
+ inode->i_extra_isize = new_extra_isize;
+ if (needed_size)
+ *needed_size = 0;
+ goto write_inode;
+ }
+
+ start += sizeof(__u32);
+ end = (char *)inode + EXT2_INODE_SIZE(fs->super);
+ last = entry = (struct ext2_ext_attr_entry *)start;
+ offs = end - start;
+ /* Consider space takenup by magic number */
+ total_ino = sizeof(__u32);
+ free = ext2fs_attr_free_space(last, &offs, start, &total_ino);
+
+ /* Enough free space available in the inode for expansion */
+ if (free >= new_extra_isize) {
+ ext2fs_attr_shift_entries(entry,
+ inode->i_extra_isize - new_extra_isize,
+ (char *)inode +
+ EXT2_GOOD_OLD_INODE_SIZE +
+ new_extra_isize,
+ start - sizeof(__u32), total_ino);
+ inode->i_extra_isize = new_extra_isize;
+ if (needed_size)
+ *needed_size = 0;
+ goto write_inode;
+ }
+
+ if (inode->i_file_acl) {
+ error = ext2fs_read_ext_attr(fs, inode->i_file_acl, block_buf);
+ if (error)
+ goto cleanup;
+
+ header = BHDR(block_buf);
+ if (header->h_magic != EXT2_EXT_ATTR_MAGIC) {
+ error = EXT2_ET_EA_BAD_MAGIC;
+ goto cleanup;
+ }
+ end = block_buf + fs->blocksize;
+ last = entry = (struct ext2_ext_attr_entry *)(header+1);
+ start = (char *)entry;
+ offs = end - start;
+ free = ext2fs_attr_free_space(last, &offs, start, &total_blk);
+ if (free < new_extra_isize) {
+ if (!tried_min_extra_isize && s_min_extra_isize) {
+ tried_min_extra_isize++;
+ new_extra_isize = s_min_extra_isize;
+ goto retry;
+ }
+ if (ret)
+ *ret = EXT2_EXPAND_EISIZE_NOSPC;
+ error = EXT2_ET_EA_NO_SPACE;
+ goto cleanup;
+ }
+ } else {
+ if (ret && *ret == EXT2_EXPAND_EISIZE_UNSAFE) {
+ *ret = EXT2_EXPAND_EISIZE_NEW_BLOCK;
+ error = 0;
+ goto cleanup;
+ }
+ free = fs->blocksize;
+ }
+
+ while (new_extra_isize > 0) {
+ int offs, size, entry_size;
+ struct ext2_ext_attr_entry *small_entry = NULL;
+ struct ext2_attr_info i = {
+ .value = NULL,
+ .value_len = 0,
+ };
+ unsigned int total_size, shift_bytes, temp = ~0U, extra_isize=0;
+
+ start = (char *)inode + EXT2_GOOD_OLD_INODE_SIZE +
+ inode->i_extra_isize + sizeof(__u32);
+ end = (char *)inode + EXT2_INODE_SIZE(fs->super);
+ last = (struct ext2_ext_attr_entry *)start;
+
+ /* Find the entry best suited to be pushed into EA block */
+ entry = NULL;
+ for (; !EXT2_EXT_IS_LAST_ENTRY(last);
+ last = EXT2_EXT_ATTR_NEXT(last)) {
+ total_size = EXT2_EXT_ATTR_SIZE(last->e_value_size) +
+ EXT2_EXT_ATTR_LEN(last->e_name_len);
+ if (total_size <= free && total_size < temp) {
+ if (total_size < new_extra_isize) {
+ small_entry = last;
+ } else {
+ entry = last;
+ temp = total_size;
+ }
+ }
+ }
+
+ if (entry == NULL) {
+ if (small_entry) {
+ entry = small_entry;
+ } else {
+ if (!tried_min_extra_isize &&
+ s_min_extra_isize) {
+ tried_min_extra_isize++;
+ new_extra_isize = s_min_extra_isize;
+ goto retry;
+ }
+ if (ret)
+ *ret = EXT2_EXPAND_EISIZE_NOSPC;
+ error = EXT2_ET_EA_NO_SPACE;
+ goto cleanup;
+ }
+ }
+ offs = entry->e_value_offs;
+ size = entry->e_value_size;
+ entry_size = EXT2_EXT_ATTR_LEN(entry->e_name_len);
+ i.name_index = entry->e_name_index;
+ error = ext2fs_get_mem(EXT2_EXT_ATTR_SIZE(size), &buffer);
+ if (error)
+ goto cleanup;
+ error = ext2fs_get_mem(entry->e_name_len + 1, &b_entry_name);
+ if (error)
+ goto cleanup;
+ /* Save the entry name and the entry value */
+ memcpy((char *)buffer, (char *)start + offs,
+ EXT2_EXT_ATTR_SIZE(size));
+ memcpy((char *)b_entry_name, (char *)entry->e_name,
+ entry->e_name_len);
+ b_entry_name[entry->e_name_len] = '\0';
+ i.name = b_entry_name;
+
+ error = ext2fs_attr_ibody_find(fs, inode, &i, &is);
+ if (error)
+ goto cleanup;
+
+ error = ext2fs_attr_set_entry(fs, &i, &is.s);
+ if (error)
+ goto cleanup;
+
+ entry = (struct ext2_ext_attr_entry *)start;
+ if (entry_size + EXT2_EXT_ATTR_SIZE(size) >= new_extra_isize)
+ shift_bytes = new_extra_isize;
+ else
+ shift_bytes = entry_size + EXT2_EXT_ATTR_SIZE(size);
+ ext2fs_attr_shift_entries(entry,
+ inode->i_extra_isize - shift_bytes,
+ (char *)inode +EXT2_GOOD_OLD_INODE_SIZE+
+ extra_isize + shift_bytes,
+ start - sizeof(__u32),
+ total_ino - entry_size);
+
+ extra_isize += shift_bytes;
+ new_extra_isize -= shift_bytes;
+ if (needed_size)
+ *needed_size = new_extra_isize;
+ inode->i_extra_isize = extra_isize;
+
+ i.name = b_entry_name;
+ i.value = buffer;
+ i.value_len = size;
+ error = ext2fs_attr_block_find(fs, (struct ext2_inode *)inode,
+ &i, &bs);
+ if (error)
+ goto cleanup;
+
+ /* Add entry which was removed from the inode into the block */
+ error = ext2fs_attr_block_set(fs, (struct ext2_inode *)inode,
+ &i, &bs);
+ if (error)
+ goto cleanup;
+ }
+
+write_inode:
+ error = ext2fs_write_inode_full(fs, ino, (struct ext2_inode *)inode,
+ EXT2_INODE_SIZE(fs->super));
+cleanup:
+ if (inode_buf)
+ ext2fs_free_mem(&inode_buf);
+ if (block_buf)
+ ext2fs_free_mem(&block_buf);
+ if (buffer)
+ ext2fs_free_mem(&buffer);
+ if (b_entry_name)
+ ext2fs_free_mem(&b_entry_name);
+
+ return error;
+}
git://git.whamcloud.com / tools / e2fsprogs.git / blobdiff