#define EXT4_MMP_MAX_CHECK_INTERVAL 300UL
/*
-+ * Maximum size of xattr attributes for FEATURE_INCOMPAT_EA_INODE 1Mb
++ * Maximum size of xattr attributes for FEATURE_INCOMPAT_EA_INODE 1MB
+ * This limit is arbitrary, but is reasonable for the xattr API.
+ */
+#define EXT4_XATTR_MAX_LARGE_EA_SIZE (1024 * 1024)
if (IS_ERR(handle)) {
ext4_std_error(inode->i_sb, PTR_ERR(handle));
/*
-@@ -249,9 +249,36 @@ void ext4_evict_inode(struct inode *inod
- sb_end_intwrite(inode->i_sb);
- goto no_delete;
- }
--
+@@ -252,6 +252,32 @@ void ext4_evict_inode(struct inode *inod
+
if (IS_SYNC(inode))
ext4_handle_sync(handle);
+
-+ /*
-+ * Delete xattr inode before deleting the main inode.
-+ */
++ /* Delete xattr inode before deleting the main inode. */
+ err = ext4_xattr_delete_inode(handle, inode, &lea_ino_array);
+ if (err) {
+ ext4_warning(inode->i_sb,
inode->i_size = 0;
err = ext4_mark_inode_dirty(handle, inode);
if (err) {
-@@ -306,8 +333,12 @@ void ext4_evict_inode(struct inode *inod
- ext4_clear_inode(inode);
- else
+@@ -269,10 +296,10 @@ void ext4_evict_inode(struct inode *inod
+ * enough credits left in the handle to remove the inode from
+ * the orphan list and set the dtime field.
+ */
+- if (!ext4_handle_has_enough_credits(handle, 3)) {
+- err = ext4_journal_extend(handle, 3);
++ if (!ext4_handle_has_enough_credits(handle, extra_credits)) {
++ err = ext4_journal_extend(handle, extra_credits);
+ if (err > 0)
+- err = ext4_journal_restart(handle, 3);
++ err = ext4_journal_restart(handle, extra_credits);
+ if (err != 0) {
+ ext4_warning(inode->i_sb,
+ "couldn't extend journal (err %d)", err);
+@@ -308,6 +335,9 @@ void ext4_evict_inode(struct inode *inod
ext4_free_inode(handle, inode);
-+
ext4_journal_stop(handle);
sb_end_intwrite(inode->i_sb);
+
return;
no_delete:
ext4_clear_inode(inode); /* We must guarantee clearing of inode... */
-@@ -4681,7 +4712,7 @@ static int ext4_index_trans_blocks(struc
+@@ -4681,7 +4711,7 @@ static int ext4_index_trans_blocks(struc
*
* Also account for superblock, inode, quota and xattr blocks
*/
{
struct ext4_xattr_entry *entry;
size_t name_len;
-@@ -265,11 +273,104 @@ ext4_xattr_find_entry(struct ext4_xattr_
+@@ -265,11 +273,109 @@ ext4_xattr_find_entry(struct ext4_xattr_
break;
}
*pentry = entry;
+/*
+ * Read the EA value from an inode.
+ */
-+static int
-+ext4_xattr_inode_read(struct inode *ea_inode, void *buf, size_t *size)
++static int ext4_xattr_inode_read(struct inode *ea_inode, void *buf, size_t *size)
+{
+ unsigned long block = 0;
+ struct buffer_head *bh = NULL;
+ return err;
+}
+
-+struct inode *ext4_xattr_inode_iget(struct inode *parent, unsigned long ea_ino, int *err)
++/*
++ * Fetch the xattr inode from disk.
++ *
++ * The xattr inode stores the parent inode number and generation so that
++ * the kernel and e2fsck can verify the xattr inode is valid upon access.
++ */
++struct inode *ext4_xattr_inode_iget(struct inode *parent,
++ unsigned long ea_ino, int *err)
+{
+ struct inode *ea_inode = NULL;
+
+ return NULL;
+ }
+
-+ if (ea_inode->i_xattr_inode_parent != parent->i_ino ||
++ if (EXT4_XATTR_INODE_GET_PARENT(ea_inode) != parent->i_ino ||
+ ea_inode->i_generation != parent->i_generation) {
+ ext4_error(parent->i_sb, "Backpointer from EA inode %lu "
+ "to parent invalid.", ea_ino);
+/*
+ * Read the value from the EA inode.
+ */
-+static int
-+ext4_xattr_inode_get(struct inode *inode, unsigned long ea_ino, void *buffer,
-+ size_t *size)
++static int ext4_xattr_inode_get(struct inode *inode, unsigned long ea_ino,
++ void *buffer, size_t *size)
+{
+ struct inode *ea_inode = NULL;
+ int err;
size_t offs = le16_to_cpu(last->e_value_offs);
if (offs < *min_offs)
*min_offs = offs;
-@@ -611,16 +728,174 @@ static size_t ext4_xattr_free_space(stru
+@@ -611,16 +728,198 @@ static size_t ext4_xattr_free_space(stru
return (*min_offs - ((void *)last - base) - sizeof(__u32));
}
+ return ret;
+}
+
++static void ext4_xattr_inode_set_ref(struct inode *ea_inode, __u64 ref_count)
++{
++ ea_inode->i_ctime.tv_sec = (__u32)(ref_count >> 32);
++ ea_inode->i_version = (__u32)ref_count;
++}
++
++static void ext4_xattr_inode_set_hash(struct inode *ea_inode, __u32 hash)
++{
++ ea_inode->i_atime.tv_sec = hash;
++}
++
+/*
+ * Create an inode to store the value of a large EA.
+ */
+static struct inode *
-+ext4_xattr_inode_create(handle_t *handle, struct inode *inode)
++ext4_xattr_inode_create(handle_t *handle, struct inode *inode, __u32 hash)
+{
+ struct inode *ea_inode = NULL;
+
+ * A back-pointer from EA inode to parent inode will be useful
+ * for e2fsck.
+ */
-+ ea_inode->i_xattr_inode_parent = inode->i_ino;
++ EXT4_XATTR_INODE_SET_PARENT(ea_inode, inode->i_ino);
+ unlock_new_inode(ea_inode);
++
++ ext4_xattr_inode_set_ref(ea_inode, 1);
++ ext4_xattr_inode_set_hash(ea_inode, hash);
+ }
+
+ return ea_inode;
+ return 0;
+}
+
++static __u32
++ext4_xattr_inode_hash(struct ext4_sb_info *sbi, const void *buffer, size_t size)
++{
++ if (ext4_has_metadata_csum(sbi->s_sb))
++ return ext4_chksum(sbi, sbi->s_csum_seed, buffer, size);
++ return 0;
++}
++
+/*
+ * Add value of the EA in an inode.
+ */
+ const void *value, size_t value_len)
+{
+ struct inode *ea_inode = NULL;
++ __u32 hash;
+ int err;
+
+ /* Create an inode for the EA value */
-+ ea_inode = ext4_xattr_inode_create(handle, inode);
++ hash = ext4_xattr_inode_hash(EXT4_SB(inode->i_sb), value, value_len);
++ ea_inode = ext4_xattr_inode_create(handle, inode, hash);
+ if (IS_ERR(ea_inode))
+ return -1;
+
size_t offs = le16_to_cpu(last->e_value_offs);
if (offs < min_offs)
min_offs = offs;
-@@ -628,15 +903,21 @@ ext4_xattr_set_entry(struct ext4_xattr_i
+@@ -628,15 +927,21 @@ ext4_xattr_set_entry(struct ext4_xattr_i
}
free = min_offs - ((void *)last - s->base) - sizeof(__u32);
if (!s->not_found) {
return -ENOSPC;
}
-@@ -651,7 +931,8 @@ ext4_xattr_set_entry(struct ext4_xattr_i
+@@ -651,7 +955,8 @@ ext4_xattr_set_entry(struct ext4_xattr_i
s->here->e_name_len = name_len;
memcpy(s->here->e_name, i->name, name_len);
} else {
void *first_val = s->base + min_offs;
size_t offs = le16_to_cpu(s->here->e_value_offs);
void *val = s->base + offs;
-@@ -685,13 +966,18 @@ ext4_xattr_set_entry(struct ext4_xattr_i
+@@ -685,13 +990,18 @@ ext4_xattr_set_entry(struct ext4_xattr_i
last = s->first;
while (!IS_LAST_ENTRY(last)) {
size_t o = le16_to_cpu(last->e_value_offs);
if (!i->value) {
/* Remove the old name. */
size_t size = EXT4_XATTR_LEN(name_len);
-@@ -705,10 +990,17 @@ ext4_xattr_set_entry(struct ext4_xattr_i
+@@ -705,10 +1014,17 @@ ext4_xattr_set_entry(struct ext4_xattr_i
if (i->value) {
/* Insert the new value. */
s->here->e_value_size = cpu_to_le32(i->value_len);
if (i->value == EXT4_ZERO_XATTR_VALUE) {
memset(val, 0, size);
} else {
-@@ -758,7 +1050,7 @@ ext4_xattr_block_find(struct inode *inod
+@@ -758,7 +1074,7 @@ ext4_xattr_block_find(struct inode *inod
bs->s.end = bs->bh->b_data + bs->bh->b_size;
bs->s.here = bs->s.first;
error = ext4_xattr_find_entry(&bs->s.here, i->name_index,
- i->name, bs->bh->b_size, 1);
-+ i->name, bs->bh->b_size, 1, inode);
++ i->name, bs->bh->b_size, 1, inode);
if (error && error != -ENODATA)
goto cleanup;
bs->s.not_found = error;
-@@ -782,8 +1074,6 @@ ext4_xattr_block_set(handle_t *handle, s
+@@ -782,8 +1098,6 @@ ext4_xattr_block_set(handle_t *handle, s
#define header(x) ((struct ext4_xattr_header *)(x))
if (s->base) {
ce = mb_cache_entry_get(ext4_xattr_cache, bs->bh->b_bdev,
bs->bh->b_blocknr);
-@@ -799,7 +1089,7 @@ ext4_xattr_block_set(handle_t *handle, s
+@@ -799,7 +1113,7 @@ ext4_xattr_block_set(handle_t *handle, s
ce = NULL;
}
ea_bdebug(bs->bh, "modifying in-place");
if (!error) {
if (!IS_LAST_ENTRY(s->first))
ext4_xattr_rehash(header(s->base),
-@@ -850,7 +1140,7 @@ ext4_xattr_block_set(handle_t *handle, s
+@@ -850,7 +1164,7 @@ ext4_xattr_block_set(handle_t *handle, s
s->end = s->base + sb->s_blocksize;
}
if (error == -EIO)
goto bad_block;
if (error)
-@@ -1000,7 +1290,7 @@ int ext4_xattr_ibody_find(struct inode *
+@@ -1000,7 +1314,7 @@ int ext4_xattr_ibody_find(struct inode *
/* Find the named attribute. */
error = ext4_xattr_find_entry(&is->s.here, i->name_index,
i->name, is->s.end -
if (error && error != -ENODATA)
return error;
is->s.not_found = error;
-@@ -1018,7 +1308,7 @@ int ext4_xattr_ibody_inline_set(handle_t
+@@ -1018,7 +1332,7 @@ int ext4_xattr_ibody_inline_set(handle_t
if (EXT4_I(inode)->i_extra_isize == 0)
return -ENOSPC;
if (error) {
if (error == -ENOSPC &&
ext4_has_inline_data(inode)) {
-@@ -1030,7 +1320,7 @@ int ext4_xattr_ibody_inline_set(handle_t
+@@ -1030,7 +1344,7 @@ int ext4_xattr_ibody_inline_set(handle_t
error = ext4_xattr_ibody_find(inode, i, is);
if (error)
return error;
}
if (error)
return error;
-@@ -1056,7 +1346,7 @@ static int ext4_xattr_ibody_set(handle_t
+@@ -1056,7 +1370,7 @@ static int ext4_xattr_ibody_set(handle_t
if (EXT4_I(inode)->i_extra_isize == 0)
return -ENOSPC;
if (error)
return error;
header = IHDR(inode, ext4_raw_inode(&is->iloc));
-@@ -1092,7 +1382,7 @@ ext4_xattr_set_handle(handle_t *handle,
+@@ -1092,7 +1406,7 @@ ext4_xattr_set_handle(handle_t *handle,
.name = name,
.value = value,
.value_len = value_len,
};
struct ext4_xattr_ibody_find is = {
.s = { .not_found = -ENODATA, },
-@@ -1157,6 +1447,15 @@ ext4_xattr_set_handle(handle_t *handle,
+@@ -1157,6 +1471,15 @@ ext4_xattr_set_handle(handle_t *handle,
goto cleanup;
}
error = ext4_xattr_block_set(handle, inode, &i, &bs);
if (error)
goto cleanup;
if (!is.s.not_found) {
-@@ -1203,9 +1502,22 @@ ext4_xattr_set(struct inode *inode, int
+@@ -1203,9 +1526,22 @@ ext4_xattr_set(struct inode *inode, int
const void *value, size_t value_len, int flags)
{
handle_t *handle;
retry:
handle = ext4_journal_start(inode, EXT4_HT_XATTR, credits);
if (IS_ERR(handle)) {
-@@ -1217,7 +1529,7 @@ retry:
+@@ -1217,7 +1553,7 @@ retry:
value, value_len, flags);
error2 = ext4_journal_stop(handle);
if (error == -ENOSPC &&
goto retry;
if (error == 0)
error = error2;
-@@ -1239,7 +1551,7 @@ static void ext4_xattr_shift_entries(str
+@@ -1239,7 +1575,7 @@ static void ext4_xattr_shift_entries(str
/* Adjust the value offsets of the entries */
for (; !IS_LAST_ENTRY(last); last = EXT4_XATTR_NEXT(last)) {
new_offs = le16_to_cpu(last->e_value_offs) +
value_offs_shift;
BUG_ON(new_offs + le32_to_cpu(last->e_value_size)
-@@ -1477,21 +1789,135 @@ cleanup:
+@@ -1477,21 +1813,135 @@ cleanup:
}
bh = sb_bread(inode->i_sb, EXT4_I(inode)->i_file_acl);
if (!bh) {
EXT4_ERROR_INODE(inode, "block %llu read error",
-@@ -1504,11 +1930,69 @@ ext4_xattr_delete_inode(handle_t *handle
+@@ -1504,11 +1954,69 @@ ext4_xattr_delete_inode(handle_t *handle
EXT4_I(inode)->i_file_acl);
goto cleanup;
}
}
/*
-@@ -1578,10 +2062,9 @@ ext4_xattr_cmp(struct ext4_xattr_header
+@@ -1578,10 +2086,9 @@ ext4_xattr_cmp(struct ext4_xattr_header
entry1->e_name_index != entry2->e_name_index ||
entry1->e_name_len != entry2->e_name_len ||
entry1->e_value_size != entry2->e_value_size ||
if (memcmp((char *)header1 + le16_to_cpu(entry1->e_value_offs),
(char *)header2 + le16_to_cpu(entry2->e_value_offs),
le32_to_cpu(entry1->e_value_size)))
-@@ -1665,7 +2148,7 @@ static inline void ext4_xattr_hash_entry
+@@ -1665,7 +2172,7 @@ static inline void ext4_xattr_hash_entry
*name++;
}
__le32 e_value_size; /* size of attribute value */
__le32 e_hash; /* hash value of name and value */
char e_name[0]; /* attribute name */
-@@ -67,6 +67,15 @@ struct ext4_xattr_entry {
+@@ -67,6 +67,26 @@ struct ext4_xattr_entry {
EXT4_I(inode)->i_extra_isize))
#define IFIRST(hdr) ((struct ext4_xattr_entry *)((hdr)+1))
-+#define i_xattr_inode_parent i_mtime.tv_sec
++/*
++ * Link EA inode back to parent one using i_mtime field.
++ * Extra integer type conversion added to ignore higher
++ * bits in i_mtime.tv_sec which might be set by ext4_get()
++ */
++#define EXT4_XATTR_INODE_SET_PARENT(inode, inum) \
++do { \
++ (inode)->i_mtime.tv_sec = inum; \
++} while(0)
++
++#define EXT4_XATTR_INODE_GET_PARENT(inode) \
++ ((__u32)(inode)->i_mtime.tv_sec)
+
+/*
+ * The minimum size of EA value when you start storing it in an external inode
git://git.whamcloud.com / fs / lustre-release.git / blobdiff