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Diffstat (limited to 'fs/ext4/inode.c')
-rw-r--r--fs/ext4/inode.c110
1 files changed, 86 insertions, 24 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index cecf9aa10811..e8d620a484f6 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -22,6 +22,7 @@
#include <linux/time.h>
#include <linux/highuid.h>
#include <linux/pagemap.h>
+#include <linux/dax.h>
#include <linux/quotaops.h>
#include <linux/string.h>
#include <linux/buffer_head.h>
@@ -377,7 +378,7 @@ static int __check_block_validity(struct inode *inode, const char *func,
"lblock %lu mapped to illegal pblock "
"(length %d)", (unsigned long) map->m_lblk,
map->m_len);
- return -EIO;
+ return -EFSCORRUPTED;
}
return 0;
}
@@ -479,7 +480,7 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode,
/* We can handle the block number less than EXT_MAX_BLOCKS */
if (unlikely(map->m_lblk >= EXT_MAX_BLOCKS))
- return -EIO;
+ return -EFSCORRUPTED;
/* Lookup extent status tree firstly */
if (ext4_es_lookup_extent(inode, map->m_lblk, &es)) {
@@ -964,7 +965,7 @@ static int ext4_block_write_begin(struct page *page, loff_t pos, unsigned len,
if (unlikely(err))
page_zero_new_buffers(page, from, to);
else if (decrypt)
- err = ext4_decrypt_one(inode, page);
+ err = ext4_decrypt(page);
return err;
}
#endif
@@ -1180,6 +1181,38 @@ errout:
return ret ? ret : copied;
}
+/*
+ * This is a private version of page_zero_new_buffers() which doesn't
+ * set the buffer to be dirty, since in data=journalled mode we need
+ * to call ext4_handle_dirty_metadata() instead.
+ */
+static void zero_new_buffers(struct page *page, unsigned from, unsigned to)
+{
+ unsigned int block_start = 0, block_end;
+ struct buffer_head *head, *bh;
+
+ bh = head = page_buffers(page);
+ do {
+ block_end = block_start + bh->b_size;
+ if (buffer_new(bh)) {
+ if (block_end > from && block_start < to) {
+ if (!PageUptodate(page)) {
+ unsigned start, size;
+
+ start = max(from, block_start);
+ size = min(to, block_end) - start;
+
+ zero_user(page, start, size);
+ set_buffer_uptodate(bh);
+ }
+ clear_buffer_new(bh);
+ }
+ }
+ block_start = block_end;
+ bh = bh->b_this_page;
+ } while (bh != head);
+}
+
static int ext4_journalled_write_end(struct file *file,
struct address_space *mapping,
loff_t pos, unsigned len, unsigned copied,
@@ -1206,7 +1239,7 @@ static int ext4_journalled_write_end(struct file *file,
if (copied < len) {
if (!PageUptodate(page))
copied = 0;
- page_zero_new_buffers(page, from+copied, to);
+ zero_new_buffers(page, from+copied, to);
}
ret = ext4_walk_page_buffers(handle, page_buffers(page), from,
@@ -1814,11 +1847,22 @@ static int ext4_writepage(struct page *page,
* the page. But we may reach here when we do a journal commit via
* journal_submit_inode_data_buffers() and in that case we must write
* allocated buffers to achieve data=ordered mode guarantees.
+ *
+ * Also, if there is only one buffer per page (the fs block
+ * size == the page size), if one buffer needs block
+ * allocation or needs to modify the extent tree to clear the
+ * unwritten flag, we know that the page can't be written at
+ * all, so we might as well refuse the write immediately.
+ * Unfortunately if the block size != page size, we can't as
+ * easily detect this case using ext4_walk_page_buffers(), but
+ * for the extremely common case, this is an optimization that
+ * skips a useless round trip through ext4_bio_write_page().
*/
if (ext4_walk_page_buffers(NULL, page_bufs, 0, len, NULL,
ext4_bh_delay_or_unwritten)) {
redirty_page_for_writepage(wbc, page);
- if (current->flags & PF_MEMALLOC) {
+ if ((current->flags & PF_MEMALLOC) ||
+ (inode->i_sb->s_blocksize == PAGE_CACHE_SIZE)) {
/*
* For memory cleaning there's no point in writing only
* some buffers. So just bail out. Warn if we came here
@@ -2598,8 +2642,7 @@ static int ext4_nonda_switch(struct super_block *sb)
/* We always reserve for an inode update; the superblock could be there too */
static int ext4_da_write_credits(struct inode *inode, loff_t pos, unsigned len)
{
- if (likely(EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
- EXT4_FEATURE_RO_COMPAT_LARGE_FILE)))
+ if (likely(ext4_has_feature_large_file(inode->i_sb)))
return 1;
if (pos + len <= 0x7fffffffULL)
@@ -3020,6 +3063,17 @@ static int ext4_get_block_write_nolock(struct inode *inode, sector_t iblock,
EXT4_GET_BLOCKS_NO_LOCK);
}
+int ext4_get_block_dax(struct inode *inode, sector_t iblock,
+ struct buffer_head *bh_result, int create)
+{
+ int flags = EXT4_GET_BLOCKS_PRE_IO | EXT4_GET_BLOCKS_UNWRIT_EXT;
+ if (create)
+ flags |= EXT4_GET_BLOCKS_CREATE;
+ ext4_debug("ext4_get_block_dax: inode %lu, create flag %d\n",
+ inode->i_ino, create);
+ return _ext4_get_block(inode, iblock, bh_result, flags);
+}
+
static void ext4_end_io_dio(struct kiocb *iocb, loff_t offset,
ssize_t size, void *private)
{
@@ -3381,7 +3435,7 @@ static int __ext4_block_zero_page_range(handle_t *handle,
/* We expect the key to be set. */
BUG_ON(!ext4_has_encryption_key(inode));
BUG_ON(blocksize != PAGE_CACHE_SIZE);
- WARN_ON_ONCE(ext4_decrypt_one(inode, page));
+ WARN_ON_ONCE(ext4_decrypt(page));
}
}
if (ext4_should_journal_data(inode)) {
@@ -3808,7 +3862,7 @@ static int __ext4_get_inode_loc(struct inode *inode,
iloc->bh = NULL;
if (!ext4_valid_inum(sb, inode->i_ino))
- return -EIO;
+ return -EFSCORRUPTED;
iloc->block_group = (inode->i_ino - 1) / EXT4_INODES_PER_GROUP(sb);
gdp = ext4_get_group_desc(sb, iloc->block_group, NULL);
@@ -3994,8 +4048,7 @@ static blkcnt_t ext4_inode_blocks(struct ext4_inode *raw_inode,
struct inode *inode = &(ei->vfs_inode);
struct super_block *sb = inode->i_sb;
- if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
- EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) {
+ if (ext4_has_feature_huge_file(sb)) {
/* we are using combined 48 bit field */
i_blocks = ((u64)le16_to_cpu(raw_inode->i_blocks_high)) << 32 |
le32_to_cpu(raw_inode->i_blocks_lo);
@@ -4056,7 +4109,7 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
EXT4_ERROR_INODE(inode, "bad extra_isize (%u != %u)",
EXT4_GOOD_OLD_INODE_SIZE + ei->i_extra_isize,
EXT4_INODE_SIZE(inode->i_sb));
- ret = -EIO;
+ ret = -EFSCORRUPTED;
goto bad_inode;
}
} else
@@ -4076,7 +4129,7 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
if (!ext4_inode_csum_verify(inode, raw_inode, ei)) {
EXT4_ERROR_INODE(inode, "checksum invalid");
- ret = -EIO;
+ ret = -EFSBADCRC;
goto bad_inode;
}
@@ -4118,7 +4171,7 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
ei->i_flags = le32_to_cpu(raw_inode->i_flags);
inode->i_blocks = ext4_inode_blocks(raw_inode, ei);
ei->i_file_acl = le32_to_cpu(raw_inode->i_file_acl_lo);
- if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT))
+ 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);
@@ -4191,7 +4244,7 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
!ext4_data_block_valid(EXT4_SB(sb), ei->i_file_acl, 1)) {
EXT4_ERROR_INODE(inode, "bad extended attribute block %llu",
ei->i_file_acl);
- ret = -EIO;
+ ret = -EFSCORRUPTED;
goto bad_inode;
} else if (!ext4_has_inline_data(inode)) {
if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) {
@@ -4242,7 +4295,7 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
} else if (ino == EXT4_BOOT_LOADER_INO) {
make_bad_inode(inode);
} else {
- ret = -EIO;
+ ret = -EFSCORRUPTED;
EXT4_ERROR_INODE(inode, "bogus i_mode (%o)", inode->i_mode);
goto bad_inode;
}
@@ -4260,7 +4313,7 @@ bad_inode:
struct inode *ext4_iget_normal(struct super_block *sb, unsigned long ino)
{
if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO)
- return ERR_PTR(-EIO);
+ return ERR_PTR(-EFSCORRUPTED);
return ext4_iget(sb, ino);
}
@@ -4282,7 +4335,7 @@ static int ext4_inode_blocks_set(handle_t *handle,
ext4_clear_inode_flag(inode, EXT4_INODE_HUGE_FILE);
return 0;
}
- if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE))
+ if (!ext4_has_feature_huge_file(sb))
return -EFBIG;
if (i_blocks <= 0xffffffffffffULL) {
@@ -4443,8 +4496,7 @@ static int ext4_do_update_inode(handle_t *handle,
need_datasync = 1;
}
if (ei->i_disksize > 0x7fffffffULL) {
- if (!EXT4_HAS_RO_COMPAT_FEATURE(sb,
- EXT4_FEATURE_RO_COMPAT_LARGE_FILE) ||
+ if (!ext4_has_feature_large_file(sb) ||
EXT4_SB(sb)->s_es->s_rev_level ==
cpu_to_le32(EXT4_GOOD_OLD_REV))
set_large_file = 1;
@@ -4493,8 +4545,7 @@ static int ext4_do_update_inode(handle_t *handle,
if (err)
goto out_brelse;
ext4_update_dynamic_rev(sb);
- EXT4_SET_RO_COMPAT_FEATURE(sb,
- EXT4_FEATURE_RO_COMPAT_LARGE_FILE);
+ ext4_set_feature_large_file(sb);
ext4_handle_sync(handle);
err = ext4_handle_dirty_super(handle, sb);
}
@@ -4661,8 +4712,11 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
if (error)
return error;
- if (is_quota_modification(inode, attr))
- dquot_initialize(inode);
+ if (is_quota_modification(inode, attr)) {
+ error = dquot_initialize(inode);
+ if (error)
+ return error;
+ }
if ((ia_valid & ATTR_UID && !uid_eq(attr->ia_uid, inode->i_uid)) ||
(ia_valid & ATTR_GID && !gid_eq(attr->ia_gid, inode->i_gid))) {
handle_t *handle;
@@ -4725,6 +4779,14 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
error = ext4_orphan_add(handle, inode);
orphan = 1;
}
+ /*
+ * Update c/mtime on truncate up, ext4_truncate() will
+ * update c/mtime in shrink case below
+ */
+ if (!shrink) {
+ inode->i_mtime = ext4_current_time(inode);
+ inode->i_ctime = inode->i_mtime;
+ }
down_write(&EXT4_I(inode)->i_data_sem);
EXT4_I(inode)->i_disksize = attr->ia_size;
rc = ext4_mark_inode_dirty(handle, inode);
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-01 08:19:01 +0000