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Diffstat (limited to 'fs/ext4/inode.c')
-rw-r--r--fs/ext4/inode.c130
1 files changed, 82 insertions, 48 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index c7f77c643008..420fe3deed39 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -731,10 +731,16 @@ out_sem:
!(flags & EXT4_GET_BLOCKS_ZERO) &&
!ext4_is_quota_file(inode) &&
ext4_should_order_data(inode)) {
+ loff_t start_byte =
+ (loff_t)map->m_lblk << inode->i_blkbits;
+ loff_t length = (loff_t)map->m_len << inode->i_blkbits;
+
if (flags & EXT4_GET_BLOCKS_IO_SUBMIT)
- ret = ext4_jbd2_inode_add_wait(handle, inode);
+ ret = ext4_jbd2_inode_add_wait(handle, inode,
+ start_byte, length);
else
- ret = ext4_jbd2_inode_add_write(handle, inode);
+ ret = ext4_jbd2_inode_add_write(handle, inode,
+ start_byte, length);
if (ret)
return ret;
}
@@ -1164,8 +1170,9 @@ static int ext4_block_write_begin(struct page *page, loff_t pos, unsigned len,
int err = 0;
unsigned blocksize = inode->i_sb->s_blocksize;
unsigned bbits;
- struct buffer_head *bh, *head, *wait[2], **wait_bh = wait;
- bool decrypt = false;
+ struct buffer_head *bh, *head, *wait[2];
+ int nr_wait = 0;
+ int i;
BUG_ON(!PageLocked(page));
BUG_ON(from > PAGE_SIZE);
@@ -1217,23 +1224,32 @@ static int ext4_block_write_begin(struct page *page, loff_t pos, unsigned len,
!buffer_unwritten(bh) &&
(block_start < from || block_end > to)) {
ll_rw_block(REQ_OP_READ, 0, 1, &bh);
- *wait_bh++ = bh;
- decrypt = IS_ENCRYPTED(inode) && S_ISREG(inode->i_mode);
+ wait[nr_wait++] = bh;
}
}
/*
* If we issued read requests, let them complete.
*/
- while (wait_bh > wait) {
- wait_on_buffer(*--wait_bh);
- if (!buffer_uptodate(*wait_bh))
+ for (i = 0; i < nr_wait; i++) {
+ wait_on_buffer(wait[i]);
+ if (!buffer_uptodate(wait[i]))
err = -EIO;
}
- if (unlikely(err))
+ if (unlikely(err)) {
page_zero_new_buffers(page, from, to);
- else if (decrypt)
- err = fscrypt_decrypt_page(page->mapping->host, page,
- PAGE_SIZE, 0, page->index);
+ } else if (IS_ENCRYPTED(inode) && S_ISREG(inode->i_mode)) {
+ for (i = 0; i < nr_wait; i++) {
+ int err2;
+
+ err2 = fscrypt_decrypt_pagecache_blocks(page, blocksize,
+ bh_offset(wait[i]));
+ if (err2) {
+ clear_buffer_uptodate(wait[i]);
+ err = err2;
+ }
+ }
+ }
+
return err;
}
#endif
@@ -4065,9 +4081,8 @@ static int __ext4_block_zero_page_range(handle_t *handle,
if (S_ISREG(inode->i_mode) && IS_ENCRYPTED(inode)) {
/* We expect the key to be set. */
BUG_ON(!fscrypt_has_encryption_key(inode));
- BUG_ON(blocksize != PAGE_SIZE);
- WARN_ON_ONCE(fscrypt_decrypt_page(page->mapping->host,
- page, PAGE_SIZE, 0, page->index));
+ WARN_ON_ONCE(fscrypt_decrypt_pagecache_blocks(
+ page, blocksize, bh_offset(bh)));
}
}
if (ext4_should_journal_data(inode)) {
@@ -4085,7 +4100,8 @@ static int __ext4_block_zero_page_range(handle_t *handle,
err = 0;
mark_buffer_dirty(bh);
if (ext4_should_order_data(inode))
- err = ext4_jbd2_inode_add_write(handle, inode);
+ err = ext4_jbd2_inode_add_write(handle, inode, from,
+ length);
}
unlock:
@@ -4570,6 +4586,7 @@ static int __ext4_get_inode_loc(struct inode *inode,
struct buffer_head *bh;
struct super_block *sb = inode->i_sb;
ext4_fsblk_t block;
+ struct blk_plug plug;
int inodes_per_block, inode_offset;
iloc->bh = NULL;
@@ -4658,6 +4675,7 @@ make_io:
* If we need to do any I/O, try to pre-readahead extra
* blocks from the inode table.
*/
+ blk_start_plug(&plug);
if (EXT4_SB(sb)->s_inode_readahead_blks) {
ext4_fsblk_t b, end, table;
unsigned num;
@@ -4688,6 +4706,7 @@ make_io:
get_bh(bh);
bh->b_end_io = end_buffer_read_sync;
submit_bh(REQ_OP_READ, REQ_META | REQ_PRIO, bh);
+ blk_finish_plug(&plug);
wait_on_buffer(bh);
if (!buffer_uptodate(bh)) {
EXT4_ERROR_INODE_BLOCK(inode, block,
@@ -5520,6 +5539,14 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb))))
return -EIO;
+ if (unlikely(IS_IMMUTABLE(inode)))
+ return -EPERM;
+
+ if (unlikely(IS_APPEND(inode) &&
+ (ia_valid & (ATTR_MODE | ATTR_UID |
+ ATTR_GID | ATTR_TIMES_SET))))
+ return -EPERM;
+
error = setattr_prepare(dentry, attr);
if (error)
return error;
@@ -5571,7 +5598,7 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
if (attr->ia_valid & ATTR_SIZE) {
handle_t *handle;
loff_t oldsize = inode->i_size;
- int shrink = (attr->ia_size <= inode->i_size);
+ int shrink = (attr->ia_size < inode->i_size);
if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) {
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
@@ -5585,18 +5612,33 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
if (IS_I_VERSION(inode) && attr->ia_size != inode->i_size)
inode_inc_iversion(inode);
- if (ext4_should_order_data(inode) &&
- (attr->ia_size < inode->i_size)) {
- error = ext4_begin_ordered_truncate(inode,
+ if (shrink) {
+ if (ext4_should_order_data(inode)) {
+ error = ext4_begin_ordered_truncate(inode,
attr->ia_size);
- if (error)
- goto err_out;
+ if (error)
+ goto err_out;
+ }
+ /*
+ * Blocks are going to be removed from the inode. Wait
+ * for dio in flight.
+ */
+ inode_dio_wait(inode);
+ }
+
+ down_write(&EXT4_I(inode)->i_mmap_sem);
+
+ rc = ext4_break_layouts(inode);
+ if (rc) {
+ up_write(&EXT4_I(inode)->i_mmap_sem);
+ return rc;
}
+
if (attr->ia_size != inode->i_size) {
handle = ext4_journal_start(inode, EXT4_HT_INODE, 3);
if (IS_ERR(handle)) {
error = PTR_ERR(handle);
- goto err_out;
+ goto out_mmap_sem;
}
if (ext4_handle_valid(handle) && shrink) {
error = ext4_orphan_add(handle, inode);
@@ -5624,42 +5666,31 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
i_size_write(inode, attr->ia_size);
up_write(&EXT4_I(inode)->i_data_sem);
ext4_journal_stop(handle);
- if (error) {
- if (orphan && inode->i_nlink)
- ext4_orphan_del(NULL, inode);
- goto err_out;
+ if (error)
+ goto out_mmap_sem;
+ if (!shrink) {
+ pagecache_isize_extended(inode, oldsize,
+ inode->i_size);
+ } else if (ext4_should_journal_data(inode)) {
+ ext4_wait_for_tail_page_commit(inode);
}
}
- if (!shrink) {
- pagecache_isize_extended(inode, oldsize, inode->i_size);
- } else {
- /*
- * Blocks are going to be removed from the inode. Wait
- * for dio in flight.
- */
- inode_dio_wait(inode);
- }
- if (orphan && ext4_should_journal_data(inode))
- ext4_wait_for_tail_page_commit(inode);
- down_write(&EXT4_I(inode)->i_mmap_sem);
-
- rc = ext4_break_layouts(inode);
- if (rc) {
- up_write(&EXT4_I(inode)->i_mmap_sem);
- error = rc;
- goto err_out;
- }
/*
* Truncate pagecache after we've waited for commit
* in data=journal mode to make pages freeable.
*/
truncate_pagecache(inode, inode->i_size);
- if (shrink) {
+ /*
+ * Call ext4_truncate() even if i_size didn't change to
+ * truncate possible preallocated blocks.
+ */
+ if (attr->ia_size <= oldsize) {
rc = ext4_truncate(inode);
if (rc)
error = rc;
}
+out_mmap_sem:
up_write(&EXT4_I(inode)->i_mmap_sem);
}
@@ -6190,6 +6221,9 @@ vm_fault_t ext4_page_mkwrite(struct vm_fault *vmf)
get_block_t *get_block;
int retries = 0;
+ if (unlikely(IS_IMMUTABLE(inode)))
+ return VM_FAULT_SIGBUS;
+
sb_start_pagefault(inode->i_sb);
file_update_time(vma->vm_file);
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-19 15:14:43 +0000