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Diffstat (limited to 'fs/ext4/inode.c')
-rw-r--r--fs/ext4/inode.c92
1 files changed, 61 insertions, 31 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 5cf82d03968c..3c600f02673f 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -144,16 +144,12 @@ static int ext4_meta_trans_blocks(struct inode *inode, int lblocks,
/*
* Test whether an inode is a fast symlink.
+ * A fast symlink has its symlink data stored in ext4_inode_info->i_data.
*/
int ext4_inode_is_fast_symlink(struct inode *inode)
{
- int ea_blocks = EXT4_I(inode)->i_file_acl ?
- EXT4_CLUSTER_SIZE(inode->i_sb) >> 9 : 0;
-
- if (ext4_has_inline_data(inode))
- return 0;
-
- return (S_ISLNK(inode->i_mode) && inode->i_blocks - ea_blocks == 0);
+ return S_ISLNK(inode->i_mode) && inode->i_size &&
+ (inode->i_size < EXT4_N_BLOCKS * 4);
}
/*
@@ -189,6 +185,8 @@ void ext4_evict_inode(struct inode *inode)
{
handle_t *handle;
int err;
+ int extra_credits = 3;
+ struct ext4_xattr_inode_array *ea_inode_array = NULL;
trace_ext4_evict_inode(inode);
@@ -213,7 +211,8 @@ void ext4_evict_inode(struct inode *inode)
*/
if (inode->i_ino != EXT4_JOURNAL_INO &&
ext4_should_journal_data(inode) &&
- (S_ISLNK(inode->i_mode) || S_ISREG(inode->i_mode))) {
+ (S_ISLNK(inode->i_mode) || S_ISREG(inode->i_mode)) &&
+ inode->i_data.nrpages) {
journal_t *journal = EXT4_SB(inode->i_sb)->s_journal;
tid_t commit_tid = EXT4_I(inode)->i_datasync_tid;
@@ -238,8 +237,12 @@ void ext4_evict_inode(struct inode *inode)
* protection against it
*/
sb_start_intwrite(inode->i_sb);
+
+ if (!IS_NOQUOTA(inode))
+ extra_credits += EXT4_MAXQUOTAS_DEL_BLOCKS(inode->i_sb);
+
handle = ext4_journal_start(inode, EXT4_HT_TRUNCATE,
- ext4_blocks_for_truncate(inode)+3);
+ ext4_blocks_for_truncate(inode)+extra_credits);
if (IS_ERR(handle)) {
ext4_std_error(inode->i_sb, PTR_ERR(handle));
/*
@@ -254,6 +257,16 @@ void ext4_evict_inode(struct inode *inode)
if (IS_SYNC(inode))
ext4_handle_sync(handle);
+
+ /*
+ * Set inode->i_size to 0 before calling ext4_truncate(). We need
+ * special handling of symlinks here because i_size is used to
+ * determine whether ext4_inode_info->i_data contains symlink data or
+ * block mappings. Setting i_size to 0 will remove its fast symlink
+ * status. Erase i_data so that it becomes a valid empty block map.
+ */
+ if (ext4_inode_is_fast_symlink(inode))
+ memset(EXT4_I(inode)->i_data, 0, sizeof(EXT4_I(inode)->i_data));
inode->i_size = 0;
err = ext4_mark_inode_dirty(handle, inode);
if (err) {
@@ -271,25 +284,17 @@ void ext4_evict_inode(struct inode *inode)
}
}
- /*
- * ext4_ext_truncate() doesn't reserve any slop when it
- * restarts journal transactions; therefore there may not be
- * 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 (err > 0)
- err = ext4_journal_restart(handle, 3);
- if (err != 0) {
- ext4_warning(inode->i_sb,
- "couldn't extend journal (err %d)", err);
- stop_handle:
- ext4_journal_stop(handle);
- ext4_orphan_del(NULL, inode);
- sb_end_intwrite(inode->i_sb);
- goto no_delete;
- }
+ /* Remove xattr references. */
+ err = ext4_xattr_delete_inode(handle, inode, &ea_inode_array,
+ extra_credits);
+ if (err) {
+ ext4_warning(inode->i_sb, "xattr delete (err %d)", err);
+stop_handle:
+ ext4_journal_stop(handle);
+ ext4_orphan_del(NULL, inode);
+ sb_end_intwrite(inode->i_sb);
+ ext4_xattr_inode_array_free(ea_inode_array);
+ goto no_delete;
}
/*
@@ -317,6 +322,7 @@ void ext4_evict_inode(struct inode *inode)
ext4_free_inode(handle, inode);
ext4_journal_stop(handle);
sb_end_intwrite(inode->i_sb);
+ ext4_xattr_inode_array_free(ea_inode_array);
return;
no_delete:
ext4_clear_inode(inode); /* We must guarantee clearing of inode... */
@@ -710,7 +716,7 @@ out_sem:
if (map->m_flags & EXT4_MAP_NEW &&
!(map->m_flags & EXT4_MAP_UNWRITTEN) &&
!(flags & EXT4_GET_BLOCKS_ZERO) &&
- !IS_NOQUOTA(inode) &&
+ !ext4_is_quota_file(inode) &&
ext4_should_order_data(inode)) {
if (flags & EXT4_GET_BLOCKS_IO_SUBMIT)
ret = ext4_jbd2_inode_add_wait(handle, inode);
@@ -4712,7 +4718,7 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
if (ext4_has_feature_64bit(sb))
ei->i_file_acl |=
((__u64)le16_to_cpu(raw_inode->i_file_acl_high)) << 32;
- inode->i_size = ext4_isize(raw_inode);
+ inode->i_size = ext4_isize(sb, raw_inode);
if ((size = i_size_read(inode)) < 0) {
EXT4_ERROR_INODE(inode, "bad i_size value: %lld", size);
ret = -EFSCORRUPTED;
@@ -4846,6 +4852,15 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
}
brelse(iloc.bh);
ext4_set_inode_flags(inode);
+
+ if (ei->i_flags & EXT4_EA_INODE_FL) {
+ ext4_xattr_inode_set_class(inode);
+
+ inode_lock(inode);
+ inode->i_flags |= S_NOQUOTA;
+ inode_unlock(inode);
+ }
+
unlock_new_inode(inode);
return inode;
@@ -5037,7 +5052,7 @@ static int ext4_do_update_inode(handle_t *handle,
raw_inode->i_file_acl_high =
cpu_to_le16(ei->i_file_acl >> 32);
raw_inode->i_file_acl_lo = cpu_to_le32(ei->i_file_acl);
- if (ei->i_disksize != ext4_isize(raw_inode)) {
+ if (ei->i_disksize != ext4_isize(inode->i_sb, raw_inode)) {
ext4_isize_set(raw_inode, ei->i_disksize);
need_datasync = 1;
}
@@ -5287,7 +5302,14 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
error = PTR_ERR(handle);
goto err_out;
}
+
+ /* dquot_transfer() calls back ext4_get_inode_usage() which
+ * counts xattr inode references.
+ */
+ down_read(&EXT4_I(inode)->xattr_sem);
error = dquot_transfer(inode, attr);
+ up_read(&EXT4_I(inode)->xattr_sem);
+
if (error) {
ext4_journal_stop(handle);
return error;
@@ -5307,6 +5329,14 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
loff_t oldsize = inode->i_size;
int shrink = (attr->ia_size <= inode->i_size);
+ if (ext4_encrypted_inode(inode)) {
+ error = fscrypt_get_encryption_info(inode);
+ if (error)
+ return error;
+ if (!fscrypt_has_encryption_key(inode))
+ return -ENOKEY;
+ }
+
if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) {
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
generated by cgit v1.2.3 (git 2.39.0) at 2025-02-03 03:42:36 +0300