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-rw-r--r--fs/ext4/balloc.c2
-rw-r--r--fs/ext4/ext4.h16
-rw-r--r--fs/ext4/ext4_jbd2.c3
-rw-r--r--fs/ext4/fast_commit.c44
-rw-r--r--fs/ext4/indirect.c4
-rw-r--r--fs/ext4/inline.c33
-rw-r--r--fs/ext4/inode.c26
-rw-r--r--fs/ext4/ioctl.c105
-rw-r--r--fs/ext4/mballoc.c31
-rw-r--r--fs/ext4/migrate.c4
-rw-r--r--fs/ext4/namei.c30
-rw-r--r--fs/ext4/orphan.c24
-rw-r--r--fs/ext4/resize.c39
-rw-r--r--fs/ext4/super.c13
-rw-r--r--fs/ext4/symlink.c15
-rw-r--r--fs/ext4/xattr.c168
-rw-r--r--fs/ext4/xattr.h16
17 files changed, 428 insertions, 145 deletions
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index 78ee3ef795ae..8ff4b9192a9f 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -666,7 +666,7 @@ int ext4_should_retry_alloc(struct super_block *sb, int *retries)
* it's possible we've just missed a transaction commit here,
* so ignore the returned status
*/
- jbd_debug(1, "%s: retrying operation after ENOSPC\n", sb->s_id);
+ ext4_debug("%s: retrying operation after ENOSPC\n", sb->s_id);
(void) jbd2_journal_force_commit_nested(sbi->s_journal);
return 1;
}
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 29fc575a4eb6..9bca5565547b 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -724,6 +724,8 @@ enum {
#define EXT4_IOC_GETSTATE _IOW('f', 41, __u32)
#define EXT4_IOC_GET_ES_CACHE _IOWR('f', 42, struct fiemap)
#define EXT4_IOC_CHECKPOINT _IOW('f', 43, __u32)
+#define EXT4_IOC_GETFSUUID _IOR('f', 44, struct fsuuid)
+#define EXT4_IOC_SETFSUUID _IOW('f', 44, struct fsuuid)
#define EXT4_IOC_SHUTDOWN _IOR ('X', 125, __u32)
@@ -753,6 +755,15 @@ enum {
EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT | \
EXT4_IOC_CHECKPOINT_FLAG_DRY_RUN)
+/*
+ * Structure for EXT4_IOC_GETFSUUID/EXT4_IOC_SETFSUUID
+ */
+struct fsuuid {
+ __u32 fsu_len;
+ __u32 fsu_flags;
+ __u8 fsu_uuid[];
+};
+
#if defined(__KERNEL__) && defined(CONFIG_COMPAT)
/*
* ioctl commands in 32 bit emulation
@@ -3016,7 +3027,7 @@ int ext4_fileattr_set(struct user_namespace *mnt_userns,
struct dentry *dentry, struct fileattr *fa);
int ext4_fileattr_get(struct dentry *dentry, struct fileattr *fa);
extern void ext4_reset_inode_seed(struct inode *inode);
-int ext4_update_overhead(struct super_block *sb);
+int ext4_update_overhead(struct super_block *sb, bool force);
/* migrate.c */
extern int ext4_ext_migrate(struct inode *);
@@ -3583,6 +3594,7 @@ extern struct buffer_head *ext4_get_first_inline_block(struct inode *inode,
extern int ext4_inline_data_fiemap(struct inode *inode,
struct fiemap_extent_info *fieinfo,
int *has_inline, __u64 start, __u64 len);
+extern void *ext4_read_inline_link(struct inode *inode);
struct iomap;
extern int ext4_inline_data_iomap(struct inode *inode, struct iomap *iomap);
@@ -3799,7 +3811,7 @@ static inline void set_bitmap_uptodate(struct buffer_head *bh)
extern wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ];
extern int ext4_resize_begin(struct super_block *sb);
-extern void ext4_resize_end(struct super_block *sb);
+extern int ext4_resize_end(struct super_block *sb, bool update_backups);
static inline void ext4_set_io_unwritten_flag(struct inode *inode,
struct ext4_io_end *io_end)
diff --git a/fs/ext4/ext4_jbd2.c b/fs/ext4/ext4_jbd2.c
index 3477a16d08ae..8e1fb18f465e 100644
--- a/fs/ext4/ext4_jbd2.c
+++ b/fs/ext4/ext4_jbd2.c
@@ -267,8 +267,7 @@ int __ext4_forget(const char *where, unsigned int line, handle_t *handle,
trace_ext4_forget(inode, is_metadata, blocknr);
BUFFER_TRACE(bh, "enter");
- jbd_debug(4, "forgetting bh %p: is_metadata = %d, mode %o, "
- "data mode %x\n",
+ ext4_debug("forgetting bh %p: is_metadata=%d, mode %o, data mode %x\n",
bh, is_metadata, inode->i_mode,
test_opt(inode->i_sb, DATA_FLAGS));
diff --git a/fs/ext4/fast_commit.c b/fs/ext4/fast_commit.c
index eb4c8ad1bb61..2af962cbb835 100644
--- a/fs/ext4/fast_commit.c
+++ b/fs/ext4/fast_commit.c
@@ -917,8 +917,8 @@ static int ext4_fc_write_inode_data(struct inode *inode, u32 *crc)
mutex_unlock(&ei->i_fc_lock);
cur_lblk_off = old_blk_size;
- jbd_debug(1, "%s: will try writing %d to %d for inode %ld\n",
- __func__, cur_lblk_off, new_blk_size, inode->i_ino);
+ ext4_debug("will try writing %d to %d for inode %ld\n",
+ cur_lblk_off, new_blk_size, inode->i_ino);
while (cur_lblk_off <= new_blk_size) {
map.m_lblk = cur_lblk_off;
@@ -1168,7 +1168,7 @@ static void ext4_fc_update_stats(struct super_block *sb, int status,
{
struct ext4_fc_stats *stats = &EXT4_SB(sb)->s_fc_stats;
- jbd_debug(1, "Fast commit ended with status = %d for tid %u",
+ ext4_debug("Fast commit ended with status = %d for tid %u",
status, commit_tid);
if (status == EXT4_FC_STATUS_OK) {
stats->fc_num_commits++;
@@ -1375,14 +1375,14 @@ static int ext4_fc_replay_unlink(struct super_block *sb, struct ext4_fc_tl *tl,
inode = ext4_iget(sb, darg.ino, EXT4_IGET_NORMAL);
if (IS_ERR(inode)) {
- jbd_debug(1, "Inode %d not found", darg.ino);
+ ext4_debug("Inode %d not found", darg.ino);
return 0;
}
old_parent = ext4_iget(sb, darg.parent_ino,
EXT4_IGET_NORMAL);
if (IS_ERR(old_parent)) {
- jbd_debug(1, "Dir with inode %d not found", darg.parent_ino);
+ ext4_debug("Dir with inode %d not found", darg.parent_ino);
iput(inode);
return 0;
}
@@ -1407,21 +1407,21 @@ static int ext4_fc_replay_link_internal(struct super_block *sb,
dir = ext4_iget(sb, darg->parent_ino, EXT4_IGET_NORMAL);
if (IS_ERR(dir)) {
- jbd_debug(1, "Dir with inode %d not found.", darg->parent_ino);
+ ext4_debug("Dir with inode %d not found.", darg->parent_ino);
dir = NULL;
goto out;
}
dentry_dir = d_obtain_alias(dir);
if (IS_ERR(dentry_dir)) {
- jbd_debug(1, "Failed to obtain dentry");
+ ext4_debug("Failed to obtain dentry");
dentry_dir = NULL;
goto out;
}
dentry_inode = d_alloc(dentry_dir, &qstr_dname);
if (!dentry_inode) {
- jbd_debug(1, "Inode dentry not created.");
+ ext4_debug("Inode dentry not created.");
ret = -ENOMEM;
goto out;
}
@@ -1434,7 +1434,7 @@ static int ext4_fc_replay_link_internal(struct super_block *sb,
* could complete.
*/
if (ret && ret != -EEXIST) {
- jbd_debug(1, "Failed to link\n");
+ ext4_debug("Failed to link\n");
goto out;
}
@@ -1468,7 +1468,7 @@ static int ext4_fc_replay_link(struct super_block *sb, struct ext4_fc_tl *tl,
inode = ext4_iget(sb, darg.ino, EXT4_IGET_NORMAL);
if (IS_ERR(inode)) {
- jbd_debug(1, "Inode not found.");
+ ext4_debug("Inode not found.");
return 0;
}
@@ -1576,7 +1576,7 @@ static int ext4_fc_replay_inode(struct super_block *sb, struct ext4_fc_tl *tl,
/* Given that we just wrote the inode on disk, this SHOULD succeed. */
inode = ext4_iget(sb, ino, EXT4_IGET_NORMAL);
if (IS_ERR(inode)) {
- jbd_debug(1, "Inode not found.");
+ ext4_debug("Inode not found.");
return -EFSCORRUPTED;
}
@@ -1630,7 +1630,7 @@ static int ext4_fc_replay_create(struct super_block *sb, struct ext4_fc_tl *tl,
inode = ext4_iget(sb, darg.ino, EXT4_IGET_NORMAL);
if (IS_ERR(inode)) {
- jbd_debug(1, "inode %d not found.", darg.ino);
+ ext4_debug("inode %d not found.", darg.ino);
inode = NULL;
ret = -EINVAL;
goto out;
@@ -1643,7 +1643,7 @@ static int ext4_fc_replay_create(struct super_block *sb, struct ext4_fc_tl *tl,
*/
dir = ext4_iget(sb, darg.parent_ino, EXT4_IGET_NORMAL);
if (IS_ERR(dir)) {
- jbd_debug(1, "Dir %d not found.", darg.ino);
+ ext4_debug("Dir %d not found.", darg.ino);
goto out;
}
ret = ext4_init_new_dir(NULL, dir, inode);
@@ -1727,7 +1727,7 @@ static int ext4_fc_replay_add_range(struct super_block *sb,
inode = ext4_iget(sb, le32_to_cpu(fc_add_ex.fc_ino), EXT4_IGET_NORMAL);
if (IS_ERR(inode)) {
- jbd_debug(1, "Inode not found.");
+ ext4_debug("Inode not found.");
return 0;
}
@@ -1741,7 +1741,7 @@ static int ext4_fc_replay_add_range(struct super_block *sb,
cur = start;
remaining = len;
- jbd_debug(1, "ADD_RANGE, lblk %d, pblk %lld, len %d, unwritten %d, inode %ld\n",
+ ext4_debug("ADD_RANGE, lblk %d, pblk %lld, len %d, unwritten %d, inode %ld\n",
start, start_pblk, len, ext4_ext_is_unwritten(ex),
inode->i_ino);
@@ -1802,7 +1802,7 @@ static int ext4_fc_replay_add_range(struct super_block *sb,
}
/* Range is mapped and needs a state change */
- jbd_debug(1, "Converting from %ld to %d %lld",
+ ext4_debug("Converting from %ld to %d %lld",
map.m_flags & EXT4_MAP_UNWRITTEN,
ext4_ext_is_unwritten(ex), map.m_pblk);
ret = ext4_ext_replay_update_ex(inode, cur, map.m_len,
@@ -1845,7 +1845,7 @@ ext4_fc_replay_del_range(struct super_block *sb, struct ext4_fc_tl *tl,
inode = ext4_iget(sb, le32_to_cpu(lrange.fc_ino), EXT4_IGET_NORMAL);
if (IS_ERR(inode)) {
- jbd_debug(1, "Inode %d not found", le32_to_cpu(lrange.fc_ino));
+ ext4_debug("Inode %d not found", le32_to_cpu(lrange.fc_ino));
return 0;
}
@@ -1853,7 +1853,7 @@ ext4_fc_replay_del_range(struct super_block *sb, struct ext4_fc_tl *tl,
if (ret)
goto out;
- jbd_debug(1, "DEL_RANGE, inode %ld, lblk %d, len %d\n",
+ ext4_debug("DEL_RANGE, inode %ld, lblk %d, len %d\n",
inode->i_ino, le32_to_cpu(lrange.fc_lblk),
le32_to_cpu(lrange.fc_len));
while (remaining > 0) {
@@ -1902,7 +1902,7 @@ static void ext4_fc_set_bitmaps_and_counters(struct super_block *sb)
inode = ext4_iget(sb, state->fc_modified_inodes[i],
EXT4_IGET_NORMAL);
if (IS_ERR(inode)) {
- jbd_debug(1, "Inode %d not found.",
+ ext4_debug("Inode %d not found.",
state->fc_modified_inodes[i]);
continue;
}
@@ -2031,7 +2031,7 @@ static int ext4_fc_replay_scan(journal_t *journal,
for (cur = start; cur < end; cur = cur + sizeof(tl) + le16_to_cpu(tl.fc_len)) {
memcpy(&tl, cur, sizeof(tl));
val = cur + sizeof(tl);
- jbd_debug(3, "Scan phase, tag:%s, blk %lld\n",
+ ext4_debug("Scan phase, tag:%s, blk %lld\n",
tag2str(le16_to_cpu(tl.fc_tag)), bh->b_blocknr);
switch (le16_to_cpu(tl.fc_tag)) {
case EXT4_FC_TAG_ADD_RANGE:
@@ -2126,7 +2126,7 @@ static int ext4_fc_replay(journal_t *journal, struct buffer_head *bh,
sbi->s_mount_state |= EXT4_FC_REPLAY;
}
if (!sbi->s_fc_replay_state.fc_replay_num_tags) {
- jbd_debug(1, "Replay stops\n");
+ ext4_debug("Replay stops\n");
ext4_fc_set_bitmaps_and_counters(sb);
return 0;
}
@@ -2150,7 +2150,7 @@ static int ext4_fc_replay(journal_t *journal, struct buffer_head *bh,
ext4_fc_set_bitmaps_and_counters(sb);
break;
}
- jbd_debug(3, "Replay phase, tag:%s\n",
+ ext4_debug("Replay phase, tag:%s\n",
tag2str(le16_to_cpu(tl.fc_tag)));
state->fc_replay_num_tags--;
switch (le16_to_cpu(tl.fc_tag)) {
diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c
index 07a8c75b65ed..860fc5119009 100644
--- a/fs/ext4/indirect.c
+++ b/fs/ext4/indirect.c
@@ -460,7 +460,7 @@ static int ext4_splice_branch(handle_t *handle,
* the new i_size. But that is not done here - it is done in
* generic_commit_write->__mark_inode_dirty->ext4_dirty_inode.
*/
- jbd_debug(5, "splicing indirect only\n");
+ ext4_debug("splicing indirect only\n");
BUFFER_TRACE(where->bh, "call ext4_handle_dirty_metadata");
err = ext4_handle_dirty_metadata(handle, ar->inode, where->bh);
if (err)
@@ -472,7 +472,7 @@ static int ext4_splice_branch(handle_t *handle,
err = ext4_mark_inode_dirty(handle, ar->inode);
if (unlikely(err))
goto err_out;
- jbd_debug(5, "splicing direct\n");
+ ext4_debug("splicing direct\n");
}
return err;
diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index cff52ff6549d..a4fbe825694b 100644
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -6,6 +6,7 @@
#include <linux/iomap.h>
#include <linux/fiemap.h>
+#include <linux/namei.h>
#include <linux/iversion.h>
#include <linux/sched/mm.h>
@@ -35,6 +36,9 @@ static int get_max_inline_xattr_value_size(struct inode *inode,
struct ext4_inode *raw_inode;
int free, min_offs;
+ if (!EXT4_INODE_HAS_XATTR_SPACE(inode))
+ return 0;
+
min_offs = EXT4_SB(inode->i_sb)->s_inode_size -
EXT4_GOOD_OLD_INODE_SIZE -
EXT4_I(inode)->i_extra_isize -
@@ -1588,6 +1592,35 @@ out:
return ret;
}
+void *ext4_read_inline_link(struct inode *inode)
+{
+ struct ext4_iloc iloc;
+ int ret, inline_size;
+ void *link;
+
+ ret = ext4_get_inode_loc(inode, &iloc);
+ if (ret)
+ return ERR_PTR(ret);
+
+ ret = -ENOMEM;
+ inline_size = ext4_get_inline_size(inode);
+ link = kmalloc(inline_size + 1, GFP_NOFS);
+ if (!link)
+ goto out;
+
+ ret = ext4_read_inline_data(inode, link, inline_size, &iloc);
+ if (ret < 0) {
+ kfree(link);
+ goto out;
+ }
+ nd_terminate_link(link, inode->i_size, ret);
+out:
+ if (ret < 0)
+ link = ERR_PTR(ret);
+ brelse(iloc.bh);
+ return link;
+}
+
struct buffer_head *ext4_get_first_inline_block(struct inode *inode,
struct ext4_dir_entry_2 **parent_de,
int *retval)
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 9fd60fc8ba4c..601214453c3a 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -177,6 +177,8 @@ void ext4_evict_inode(struct inode *inode)
trace_ext4_evict_inode(inode);
+ if (EXT4_I(inode)->i_flags & EXT4_EA_INODE_FL)
+ ext4_evict_ea_inode(inode);
if (inode->i_nlink) {
/*
* When journalling data dirty buffers are tracked only in the
@@ -1571,7 +1573,14 @@ static void mpage_release_unused_pages(struct mpage_da_data *mpd,
ext4_lblk_t start, last;
start = index << (PAGE_SHIFT - inode->i_blkbits);
last = end << (PAGE_SHIFT - inode->i_blkbits);
+
+ /*
+ * avoid racing with extent status tree scans made by
+ * ext4_insert_delayed_block()
+ */
+ down_write(&EXT4_I(inode)->i_data_sem);
ext4_es_remove_extent(inode, start, last - start + 1);
+ up_write(&EXT4_I(inode)->i_data_sem);
}
folio_batch_init(&fbatch);
@@ -3142,13 +3151,15 @@ static sector_t ext4_bmap(struct address_space *mapping, sector_t block)
{
struct inode *inode = mapping->host;
journal_t *journal;
+ sector_t ret = 0;
int err;
+ inode_lock_shared(inode);
/*
* We can get here for an inline file via the FIBMAP ioctl
*/
if (ext4_has_inline_data(inode))
- return 0;
+ goto out;
if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY) &&
test_opt(inode->i_sb, DELALLOC)) {
@@ -3187,10 +3198,14 @@ static sector_t ext4_bmap(struct address_space *mapping, sector_t block)
jbd2_journal_unlock_updates(journal);
if (err)
- return 0;
+ goto out;
}
- return iomap_bmap(mapping, block, &ext4_iomap_ops);
+ ret = iomap_bmap(mapping, block, &ext4_iomap_ops);
+
+out:
+ inode_unlock_shared(inode);
+ return ret;
}
static int ext4_read_folio(struct file *file, struct folio *folio)
@@ -4687,8 +4702,7 @@ static inline int ext4_iget_extra_inode(struct inode *inode,
__le32 *magic = (void *)raw_inode +
EXT4_GOOD_OLD_INODE_SIZE + ei->i_extra_isize;
- if (EXT4_GOOD_OLD_INODE_SIZE + ei->i_extra_isize + sizeof(__le32) <=
- EXT4_INODE_SIZE(inode->i_sb) &&
+ if (EXT4_INODE_HAS_XATTR_SPACE(inode) &&
*magic == cpu_to_le32(EXT4_XATTR_MAGIC)) {
ext4_set_inode_state(inode, EXT4_STATE_XATTR);
return ext4_find_inline_data_nolock(inode);
@@ -5215,7 +5229,7 @@ int ext4_write_inode(struct inode *inode, struct writeback_control *wbc)
if (EXT4_SB(inode->i_sb)->s_journal) {
if (ext4_journal_current_handle()) {
- jbd_debug(1, "called recursively, non-PF_MEMALLOC!\n");
+ ext4_debug("called recursively, non-PF_MEMALLOC!\n");
dump_stack();
return -EIO;
}
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index cb01c1da0f9d..3cf3ec4b1c21 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -20,6 +20,7 @@
#include <linux/delay.h>
#include <linux/iversion.h>
#include <linux/fileattr.h>
+#include <linux/uuid.h>
#include "ext4_jbd2.h"
#include "ext4.h"
#include <linux/fsmap.h>
@@ -41,6 +42,15 @@ static void ext4_sb_setlabel(struct ext4_super_block *es, const void *arg)
memcpy(es->s_volume_name, (char *)arg, EXT4_LABEL_MAX);
}
+/*
+ * Superblock modification callback function for changing file system
+ * UUID.
+ */
+static void ext4_sb_setuuid(struct ext4_super_block *es, const void *arg)
+{
+ memcpy(es->s_uuid, (__u8 *)arg, UUID_SIZE);
+}
+
static
int ext4_update_primary_sb(struct super_block *sb, handle_t *handle,
ext4_update_sb_callback func,
@@ -944,7 +954,9 @@ static long ext4_ioctl_group_add(struct file *file,
test_opt(sb, INIT_INODE_TABLE))
err = ext4_register_li_request(sb, input->group);
group_add_out:
- ext4_resize_end(sb);
+ err2 = ext4_resize_end(sb, false);
+ if (err == 0)
+ err = err2;
return err;
}
@@ -1131,6 +1143,73 @@ static int ext4_ioctl_getlabel(struct ext4_sb_info *sbi, char __user *user_label
return 0;
}
+static int ext4_ioctl_getuuid(struct ext4_sb_info *sbi,
+ struct fsuuid __user *ufsuuid)
+{
+ struct fsuuid fsuuid;
+ __u8 uuid[UUID_SIZE];
+
+ if (copy_from_user(&fsuuid, ufsuuid, sizeof(fsuuid)))
+ return -EFAULT;
+
+ if (fsuuid.fsu_len == 0) {
+ fsuuid.fsu_len = UUID_SIZE;
+ if (copy_to_user(ufsuuid, &fsuuid, sizeof(fsuuid.fsu_len)))
+ return -EFAULT;
+ return -EINVAL;
+ }
+
+ if (fsuuid.fsu_len != UUID_SIZE || fsuuid.fsu_flags != 0)
+ return -EINVAL;
+
+ lock_buffer(sbi->s_sbh);
+ memcpy(uuid, sbi->s_es->s_uuid, UUID_SIZE);
+ unlock_buffer(sbi->s_sbh);
+
+ if (copy_to_user(&ufsuuid->fsu_uuid[0], uuid, UUID_SIZE))
+ return -EFAULT;
+ return 0;
+}
+
+static int ext4_ioctl_setuuid(struct file *filp,
+ const struct fsuuid __user *ufsuuid)
+{
+ int ret = 0;
+ struct super_block *sb = file_inode(filp)->i_sb;
+ struct fsuuid fsuuid;
+ __u8 uuid[UUID_SIZE];
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ /*
+ * If any checksums (group descriptors or metadata) are being used
+ * then the checksum seed feature is required to change the UUID.
+ */
+ if (((ext4_has_feature_gdt_csum(sb) || ext4_has_metadata_csum(sb))
+ && !ext4_has_feature_csum_seed(sb))
+ || ext4_has_feature_stable_inodes(sb))
+ return -EOPNOTSUPP;
+
+ if (copy_from_user(&fsuuid, ufsuuid, sizeof(fsuuid)))
+ return -EFAULT;
+
+ if (fsuuid.fsu_len != UUID_SIZE || fsuuid.fsu_flags != 0)
+ return -EINVAL;
+
+ if (copy_from_user(uuid, &ufsuuid->fsu_uuid[0], UUID_SIZE))
+ return -EFAULT;
+
+ ret = mnt_want_write_file(filp);
+ if (ret)
+ return ret;
+
+ ret = ext4_update_superblocks_fn(sb, ext4_sb_setuuid, &uuid);
+ mnt_drop_write_file(filp);
+
+ return ret;
+}
+
static long __ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
struct inode *inode = file_inode(filp);
@@ -1223,7 +1302,9 @@ setversion_out:
err = err2;
mnt_drop_write_file(filp);
group_extend_out:
- ext4_resize_end(sb);
+ err2 = ext4_resize_end(sb, false);
+ if (err == 0)
+ err = err2;
return err;
}
@@ -1371,7 +1452,9 @@ mext_out:
err = ext4_register_li_request(sb, o_group);
resizefs_out:
- ext4_resize_end(sb);
+ err2 = ext4_resize_end(sb, true);
+ if (err == 0)
+ err = err2;
return err;
}
@@ -1509,6 +1592,10 @@ resizefs_out:
return ext4_ioctl_setlabel(filp,
(const void __user *)arg);
+ case EXT4_IOC_GETFSUUID:
+ return ext4_ioctl_getuuid(EXT4_SB(sb), (void __user *)arg);
+ case EXT4_IOC_SETFSUUID:
+ return ext4_ioctl_setuuid(filp, (const void __user *)arg);
default:
return -ENOTTY;
}
@@ -1586,6 +1673,8 @@ long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
case EXT4_IOC_CHECKPOINT:
case FS_IOC_GETFSLABEL:
case FS_IOC_SETFSLABEL:
+ case EXT4_IOC_GETFSUUID:
+ case EXT4_IOC_SETFSUUID:
break;
default:
return -ENOIOCTLCMD;
@@ -1599,13 +1688,15 @@ static void set_overhead(struct ext4_super_block *es, const void *arg)
es->s_overhead_clusters = cpu_to_le32(*((unsigned long *) arg));
}
-int ext4_update_overhead(struct super_block *sb)
+int ext4_update_overhead(struct super_block *sb, bool force)
{
struct ext4_sb_info *sbi = EXT4_SB(sb);
- if (sb_rdonly(sb) || sbi->s_overhead == 0 ||
- sbi->s_overhead == le32_to_cpu(sbi->s_es->s_overhead_clusters))
+ if (sb_rdonly(sb))
+ return 0;
+ if (!force &&
+ (sbi->s_overhead == 0 ||
+ sbi->s_overhead == le32_to_cpu(sbi->s_es->s_overhead_clusters)))
return 0;
-
return ext4_update_superblocks_fn(sb, set_overhead, &sbi->s_overhead);
}
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 9e06334771a3..bd8f8b5c3d30 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -1933,6 +1933,7 @@ static int mb_mark_used(struct ext4_buddy *e4b, struct ext4_free_extent *ex)
unsigned ret = 0;
int len0 = len;
void *buddy;
+ bool split = false;
BUG_ON(start + len > (e4b->bd_sb->s_blocksize << 3));
BUG_ON(e4b->bd_group != ex->fe_group);
@@ -1957,12 +1958,16 @@ static int mb_mark_used(struct ext4_buddy *e4b, struct ext4_free_extent *ex)
/* let's maintain buddy itself */
while (len) {
- ord = mb_find_order_for_block(e4b, start);
+ if (!split)
+ ord = mb_find_order_for_block(e4b, start);
if (((start >> ord) << ord) == start && len >= (1 << ord)) {
/* the whole chunk may be allocated at once! */
mlen = 1 << ord;
- buddy = mb_find_buddy(e4b, ord, &max);
+ if (!split)
+ buddy = mb_find_buddy(e4b, ord, &max);
+ else
+ split = false;
BUG_ON((start >> ord) >= max);
mb_set_bit(start >> ord, buddy);
e4b->bd_info->bb_counters[ord]--;
@@ -1989,6 +1994,7 @@ static int mb_mark_used(struct ext4_buddy *e4b, struct ext4_free_extent *ex)
mb_clear_bit(cur + 1, buddy);
e4b->bd_info->bb_counters[ord]++;
e4b->bd_info->bb_counters[ord]++;
+ split = true;
}
mb_set_largest_free_order(e4b->bd_sb, e4b->bd_info);
@@ -5928,6 +5934,15 @@ static void ext4_mb_clear_bb(handle_t *handle, struct inode *inode,
sbi = EXT4_SB(sb);
+ if (!(flags & EXT4_FREE_BLOCKS_VALIDATED) &&
+ !ext4_inode_block_valid(inode, block, count)) {
+ ext4_error(sb, "Freeing blocks in system zone - "
+ "Block = %llu, count = %lu", block, count);
+ /* err = 0. ext4_std_error should be a no op */
+ goto error_return;
+ }
+ flags |= EXT4_FREE_BLOCKS_VALIDATED;
+
do_more:
overflow = 0;
ext4_get_group_no_and_offset(sb, block, &block_group, &bit);
@@ -5944,6 +5959,8 @@ do_more:
overflow = EXT4_C2B(sbi, bit) + count -
EXT4_BLOCKS_PER_GROUP(sb);
count -= overflow;
+ /* The range changed so it's no longer validated */
+ flags &= ~EXT4_FREE_BLOCKS_VALIDATED;
}
count_clusters = EXT4_NUM_B2C(sbi, count);
bitmap_bh = ext4_read_block_bitmap(sb, block_group);
@@ -5958,7 +5975,8 @@ do_more:
goto error_return;
}
- if (!ext4_inode_block_valid(inode, block, count)) {
+ if (!(flags & EXT4_FREE_BLOCKS_VALIDATED) &&
+ !ext4_inode_block_valid(inode, block, count)) {
ext4_error(sb, "Freeing blocks in system zone - "
"Block = %llu, count = %lu", block, count);
/* err = 0. ext4_std_error should be a no op */
@@ -6081,6 +6099,8 @@ do_more:
block += count;
count = overflow;
put_bh(bitmap_bh);
+ /* The range changed so it's no longer validated */
+ flags &= ~EXT4_FREE_BLOCKS_VALIDATED;
goto do_more;
}
error_return:
@@ -6127,6 +6147,7 @@ void ext4_free_blocks(handle_t *handle, struct inode *inode,
"block = %llu, count = %lu", block, count);
return;
}
+ flags |= EXT4_FREE_BLOCKS_VALIDATED;
ext4_debug("freeing block %llu\n", block);
trace_ext4_free_blocks(inode, block, count, flags);
@@ -6158,6 +6179,8 @@ void ext4_free_blocks(handle_t *handle, struct inode *inode,
block -= overflow;
count += overflow;
}
+ /* The range changed so it's no longer validated */
+ flags &= ~EXT4_FREE_BLOCKS_VALIDATED;
}
overflow = EXT4_LBLK_COFF(sbi, count);
if (overflow) {
@@ -6168,6 +6191,8 @@ void ext4_free_blocks(handle_t *handle, struct inode *inode,
return;
} else
count += sbi->s_cluster_ratio - overflow;
+ /* The range changed so it's no longer validated */
+ flags &= ~EXT4_FREE_BLOCKS_VALIDATED;
}
if (!bh && (flags & EXT4_FREE_BLOCKS_FORGET)) {
diff --git a/fs/ext4/migrate.c b/fs/ext4/migrate.c
index 42f590518b4c..54e7d3c95fd7 100644
--- a/fs/ext4/migrate.c
+++ b/fs/ext4/migrate.c
@@ -417,7 +417,7 @@ int ext4_ext_migrate(struct inode *inode)
struct inode *tmp_inode = NULL;
struct migrate_struct lb;
unsigned long max_entries;
- __u32 goal;
+ __u32 goal, tmp_csum_seed;
uid_t owner[2];
/*
@@ -465,6 +465,7 @@ int ext4_ext_migrate(struct inode *inode)
* the migration.
*/
ei = EXT4_I(inode);
+ tmp_csum_seed = EXT4_I(tmp_inode)->i_csum_seed;
EXT4_I(tmp_inode)->i_csum_seed = ei->i_csum_seed;
i_size_write(tmp_inode, i_size_read(inode));
/*
@@ -575,6 +576,7 @@ err_out:
* the inode is not visible to user space.
*/
tmp_inode->i_blocks = 0;
+ EXT4_I(tmp_inode)->i_csum_seed = tmp_csum_seed;
/* Reset the extent details */
ext4_ext_tree_init(handle, tmp_inode);
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index db4ba99d1ceb..3a31b662f661 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -54,6 +54,7 @@ static struct buffer_head *ext4_append(handle_t *handle,
struct inode *inode,
ext4_lblk_t *block)
{
+ struct ext4_map_blocks map;
struct buffer_head *bh;
int err;
@@ -63,6 +64,21 @@ static struct buffer_head *ext4_append(handle_t *handle,
return ERR_PTR(-ENOSPC);
*block = inode->i_size >> inode->i_sb->s_blocksize_bits;
+ map.m_lblk = *block;
+ map.m_len = 1;
+
+ /*
+ * We're appending new directory block. Make sure the block is not
+ * allocated yet, otherwise we will end up corrupting the
+ * directory.
+ */
+ err = ext4_map_blocks(NULL, inode, &map, 0);
+ if (err < 0)
+ return ERR_PTR(err);
+ if (err) {
+ EXT4_ERROR_INODE(inode, "Logical block already allocated");
+ return ERR_PTR(-EFSCORRUPTED);
+ }
bh = ext4_bread(handle, inode, *block, EXT4_GET_BLOCKS_CREATE);
if (IS_ERR(bh))
@@ -110,6 +126,13 @@ static struct buffer_head *__ext4_read_dirblock(struct inode *inode,
struct ext4_dir_entry *dirent;
int is_dx_block = 0;
+ if (block >= inode->i_size) {
+ ext4_error_inode(inode, func, line, block,
+ "Attempting to read directory block (%u) that is past i_size (%llu)",
+ block, inode->i_size);
+ return ERR_PTR(-EFSCORRUPTED);
+ }
+
if (ext4_simulate_fail(inode->i_sb, EXT4_SIM_DIRBLOCK_EIO))
bh = ERR_PTR(-EIO);
else
@@ -3067,11 +3090,8 @@ bool ext4_empty_dir(struct inode *inode)
de = (struct ext4_dir_entry_2 *) (bh->b_data +
(offset & (sb->s_blocksize - 1)));
if (ext4_check_dir_entry(inode, NULL, de, bh,
- bh->b_data, bh->b_size, offset)) {
- offset = (offset | (sb->s_blocksize - 1)) + 1;
- continue;
- }
- if (le32_to_cpu(de->inode)) {
+ bh->b_data, bh->b_size, offset) ||
+ le32_to_cpu(de->inode)) {
brelse(bh);
return false;
}
diff --git a/fs/ext4/orphan.c b/fs/ext4/orphan.c
index 7de0612eb42d..69a9cf9137a6 100644
--- a/fs/ext4/orphan.c
+++ b/fs/ext4/orphan.c
@@ -181,8 +181,8 @@ int ext4_orphan_add(handle_t *handle, struct inode *inode)
} else
brelse(iloc.bh);
- jbd_debug(4, "superblock will point to %lu\n", inode->i_ino);
- jbd_debug(4, "orphan inode %lu will point to %d\n",
+ ext4_debug("superblock will point to %lu\n", inode->i_ino);
+ ext4_debug("orphan inode %lu will point to %d\n",
inode->i_ino, NEXT_ORPHAN(inode));
out:
ext4_std_error(sb, err);
@@ -251,7 +251,7 @@ int ext4_orphan_del(handle_t *handle, struct inode *inode)
}
mutex_lock(&sbi->s_orphan_lock);
- jbd_debug(4, "remove inode %lu from orphan list\n", inode->i_ino);
+ ext4_debug("remove inode %lu from orphan list\n", inode->i_ino);
prev = ei->i_orphan.prev;
list_del_init(&ei->i_orphan);
@@ -267,7 +267,7 @@ int ext4_orphan_del(handle_t *handle, struct inode *inode)
ino_next = NEXT_ORPHAN(inode);
if (prev == &sbi->s_orphan) {
- jbd_debug(4, "superblock will point to %u\n", ino_next);
+ ext4_debug("superblock will point to %u\n", ino_next);
BUFFER_TRACE(sbi->s_sbh, "get_write_access");
err = ext4_journal_get_write_access(handle, inode->i_sb,
sbi->s_sbh, EXT4_JTR_NONE);
@@ -286,7 +286,7 @@ int ext4_orphan_del(handle_t *handle, struct inode *inode)
struct inode *i_prev =
&list_entry(prev, struct ext4_inode_info, i_orphan)->vfs_inode;
- jbd_debug(4, "orphan inode %lu will point to %u\n",
+ ext4_debug("orphan inode %lu will point to %u\n",
i_prev->i_ino, ino_next);
err = ext4_reserve_inode_write(handle, i_prev, &iloc2);
if (err) {
@@ -332,8 +332,8 @@ static void ext4_process_orphan(struct inode *inode,
ext4_msg(sb, KERN_DEBUG,
"%s: truncating inode %lu to %lld bytes",
__func__, inode->i_ino, inode->i_size);
- jbd_debug(2, "truncating inode %lu to %lld bytes\n",
- inode->i_ino, inode->i_size);
+ ext4_debug("truncating inode %lu to %lld bytes\n",
+ inode->i_ino, inode->i_size);
inode_lock(inode);
truncate_inode_pages(inode->i_mapping, inode->i_size);
ret = ext4_truncate(inode);
@@ -353,8 +353,8 @@ static void ext4_process_orphan(struct inode *inode,
ext4_msg(sb, KERN_DEBUG,
"%s: deleting unreferenced inode %lu",
__func__, inode->i_ino);
- jbd_debug(2, "deleting unreferenced inode %lu\n",
- inode->i_ino);
+ ext4_debug("deleting unreferenced inode %lu\n",
+ inode->i_ino);
(*nr_orphans)++;
}
iput(inode); /* The delete magic happens here! */
@@ -391,7 +391,7 @@ void ext4_orphan_cleanup(struct super_block *sb, struct ext4_super_block *es)
int inodes_per_ob = ext4_inodes_per_orphan_block(sb);
if (!es->s_last_orphan && !oi->of_blocks) {
- jbd_debug(4, "no orphan inodes to clean up\n");
+ ext4_debug("no orphan inodes to clean up\n");
return;
}
@@ -415,7 +415,7 @@ void ext4_orphan_cleanup(struct super_block *sb, struct ext4_super_block *es)
"clearing orphan list.\n");
es->s_last_orphan = 0;
}
- jbd_debug(1, "Skipping orphan recovery on fs with errors.\n");
+ ext4_debug("Skipping orphan recovery on fs with errors.\n");
return;
}
@@ -459,7 +459,7 @@ void ext4_orphan_cleanup(struct super_block *sb, struct ext4_super_block *es)
* so, skip the rest.
*/
if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) {
- jbd_debug(1, "Skipping orphan recovery on fs with errors.\n");
+ ext4_debug("Skipping orphan recovery on fs with errors.\n");
es->s_last_orphan = 0;
break;
}
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index 8b70a4701293..fea2a68d067b 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -97,10 +97,13 @@ int ext4_resize_begin(struct super_block *sb)
return ret;
}
-void ext4_resize_end(struct super_block *sb)
+int ext4_resize_end(struct super_block *sb, bool update_backups)
{
clear_bit_unlock(EXT4_FLAGS_RESIZING, &EXT4_SB(sb)->s_ext4_flags);
smp_mb__after_atomic();
+ if (update_backups)
+ return ext4_update_overhead(sb, true);
+ return 0;
}
static ext4_group_t ext4_meta_bg_first_group(struct super_block *sb,
@@ -1380,6 +1383,17 @@ static int ext4_setup_new_descs(handle_t *handle, struct super_block *sb,
return err;
}
+static void ext4_add_overhead(struct super_block *sb,
+ const ext4_fsblk_t overhead)
+{
+ struct ext4_sb_info *sbi = EXT4_SB(sb);
+ struct ext4_super_block *es = sbi->s_es;
+
+ sbi->s_overhead += overhead;
+ es->s_overhead_clusters = cpu_to_le32(sbi->s_overhead);
+ smp_wmb();
+}
+
/*
* ext4_update_super() updates the super block so that the newly added
* groups can be seen by the filesystem.
@@ -1481,9 +1495,18 @@ static void ext4_update_super(struct super_block *sb,
}
/*
- * Update the fs overhead information
+ * Update the fs overhead information.
+ *
+ * For bigalloc, if the superblock already has a properly calculated
+ * overhead, update it with a value based on numbers already computed
+ * above for the newly allocated capacity.
*/
- ext4_calculate_overhead(sb);
+ if (ext4_has_feature_bigalloc(sb) && (sbi->s_overhead != 0))
+ ext4_add_overhead(sb,
+ EXT4_NUM_B2C(sbi, blocks_count - free_blocks));
+ else
+ ext4_calculate_overhead(sb);
+ es->s_overhead_clusters = cpu_to_le32(sbi->s_overhead);
if (test_opt(sb, DEBUG))
printk(KERN_DEBUG "EXT4-fs: added group %u:"
@@ -1988,6 +2011,16 @@ int ext4_resize_fs(struct super_block *sb, ext4_fsblk_t n_blocks_count)
}
brelse(bh);
+ /*
+ * For bigalloc, trim the requested size to the nearest cluster
+ * boundary to avoid creating an unusable filesystem. We do this
+ * silently, instead of returning an error, to avoid breaking
+ * callers that blindly resize the filesystem to the full size of
+ * the underlying block device.
+ */
+ if (ext4_has_feature_bigalloc(sb))
+ n_blocks_count &= ~((1 << EXT4_CLUSTER_BITS(sb)) - 1);
+
retry:
o_blocks_count = ext4_blocks_count(es);
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 2c68dec63e54..8f907e9d9c76 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -3011,6 +3011,15 @@ static int _ext4_show_options(struct seq_file *seq, struct super_block *sb,
} else if (test_opt2(sb, DAX_INODE)) {
SEQ_OPTS_PUTS("dax=inode");
}
+
+ if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD &&
+ !test_opt2(sb, MB_OPTIMIZE_SCAN)) {
+ SEQ_OPTS_PUTS("mb_optimize_scan=0");
+ } else if (sbi->s_groups_count < MB_DEFAULT_LINEAR_SCAN_THRESHOLD &&
+ test_opt2(sb, MB_OPTIMIZE_SCAN)) {
+ SEQ_OPTS_PUTS("mb_optimize_scan=1");
+ }
+
ext4_show_quota_options(seq, sb);
return 0;
}
@@ -5523,7 +5532,7 @@ static int ext4_fill_super(struct super_block *sb, struct fs_context *fc)
"Quota mode: %s.", descr, ext4_quota_mode(sb));
/* Update the s_overhead_clusters if necessary */
- ext4_update_overhead(sb);
+ ext4_update_overhead(sb, false);
return 0;
free_sbi:
@@ -5585,7 +5594,7 @@ static struct inode *ext4_get_journal_inode(struct super_block *sb,
return NULL;
}
- jbd_debug(2, "Journal inode found at %p: %lld bytes\n",
+ ext4_debug("Journal inode found at %p: %lld bytes\n",
journal_inode, journal_inode->i_size);
if (!S_ISREG(journal_inode->i_mode)) {
ext4_msg(sb, KERN_ERR, "invalid journal inode");
diff --git a/fs/ext4/symlink.c b/fs/ext4/symlink.c
index d281f5bcc526..3d3ed3c38f56 100644
--- a/fs/ext4/symlink.c
+++ b/fs/ext4/symlink.c
@@ -74,6 +74,21 @@ static const char *ext4_get_link(struct dentry *dentry, struct inode *inode,
struct delayed_call *callback)
{
struct buffer_head *bh;
+ char *inline_link;
+
+ /*
+ * Create a new inlined symlink is not supported, just provide a
+ * method to read the leftovers.
+ */
+ if (ext4_has_inline_data(inode)) {
+ if (!dentry)
+ return ERR_PTR(-ECHILD);
+
+ inline_link = ext4_read_inline_link(inode);
+ if (!IS_ERR(inline_link))
+ set_delayed_call(callback, kfree_link, inline_link);
+ return inline_link;
+ }
if (!dentry) {
bh = ext4_getblk(NULL, inode, 0, EXT4_GET_BLOCKS_CACHED_NOWAIT);
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index 564e28a1aa94..533216e80fa2 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -436,6 +436,21 @@ error:
return err;
}
+/* Remove entry from mbcache when EA inode is getting evicted */
+void ext4_evict_ea_inode(struct inode *inode)
+{
+ struct mb_cache_entry *oe;
+
+ if (!EA_INODE_CACHE(inode))
+ return;
+ /* Wait for entry to get unused so that we can remove it */
+ while ((oe = mb_cache_entry_delete_or_get(EA_INODE_CACHE(inode),
+ ext4_xattr_inode_get_hash(inode), inode->i_ino))) {
+ mb_cache_entry_wait_unused(oe);
+ mb_cache_entry_put(EA_INODE_CACHE(inode), oe);
+ }
+}
+
static int
ext4_xattr_inode_verify_hashes(struct inode *ea_inode,
struct ext4_xattr_entry *entry, void *buffer,
@@ -976,10 +991,8 @@ int __ext4_xattr_set_credits(struct super_block *sb, struct inode *inode,
static int ext4_xattr_inode_update_ref(handle_t *handle, struct inode *ea_inode,
int ref_change)
{
- struct mb_cache *ea_inode_cache = EA_INODE_CACHE(ea_inode);
struct ext4_iloc iloc;
s64 ref_count;
- u32 hash;
int ret;
inode_lock(ea_inode);
@@ -1002,14 +1015,6 @@ static int ext4_xattr_inode_update_ref(handle_t *handle, struct inode *ea_inode,
set_nlink(ea_inode, 1);
ext4_orphan_del(handle, ea_inode);
-
- if (ea_inode_cache) {
- hash = ext4_xattr_inode_get_hash(ea_inode);
- mb_cache_entry_create(ea_inode_cache,
- GFP_NOFS, hash,
- ea_inode->i_ino,
- true /* reusable */);
- }
}
} else {
WARN_ONCE(ref_count < 0, "EA inode %lu ref_count=%lld",
@@ -1022,12 +1027,6 @@ static int ext4_xattr_inode_update_ref(handle_t *handle, struct inode *ea_inode,
clear_nlink(ea_inode);
ext4_orphan_add(handle, ea_inode);
-
- if (ea_inode_cache) {
- hash = ext4_xattr_inode_get_hash(ea_inode);
- mb_cache_entry_delete(ea_inode_cache, hash,
- ea_inode->i_ino);
- }
}
}
@@ -1237,6 +1236,7 @@ ext4_xattr_release_block(handle_t *handle, struct inode *inode,
if (error)
goto out;
+retry_ref:
lock_buffer(bh);
hash = le32_to_cpu(BHDR(bh)->h_hash);
ref = le32_to_cpu(BHDR(bh)->h_refcount);
@@ -1246,9 +1246,18 @@ ext4_xattr_release_block(handle_t *handle, struct inode *inode,
* This must happen under buffer lock for
* ext4_xattr_block_set() to reliably detect freed block
*/
- if (ea_block_cache)
- mb_cache_entry_delete(ea_block_cache, hash,
- bh->b_blocknr);
+ if (ea_block_cache) {
+ struct mb_cache_entry *oe;
+
+ oe = mb_cache_entry_delete_or_get(ea_block_cache, hash,
+ bh->b_blocknr);
+ if (oe) {
+ unlock_buffer(bh);
+ mb_cache_entry_wait_unused(oe);
+ mb_cache_entry_put(ea_block_cache, oe);
+ goto retry_ref;
+ }
+ }
get_bh(bh);
unlock_buffer(bh);
@@ -1858,6 +1867,8 @@ ext4_xattr_block_set(handle_t *handle, struct inode *inode,
#define header(x) ((struct ext4_xattr_header *)(x))
if (s->base) {
+ int offset = (char *)s->here - bs->bh->b_data;
+
BUFFER_TRACE(bs->bh, "get_write_access");
error = ext4_journal_get_write_access(handle, sb, bs->bh,
EXT4_JTR_NONE);
@@ -1873,9 +1884,20 @@ ext4_xattr_block_set(handle_t *handle, struct inode *inode,
* ext4_xattr_block_set() to reliably detect modified
* block
*/
- if (ea_block_cache)
- mb_cache_entry_delete(ea_block_cache, hash,
- bs->bh->b_blocknr);
+ if (ea_block_cache) {
+ struct mb_cache_entry *oe;
+
+ oe = mb_cache_entry_delete_or_get(ea_block_cache,
+ hash, bs->bh->b_blocknr);
+ if (oe) {
+ /*
+ * Xattr block is getting reused. Leave
+ * it alone.
+ */
+ mb_cache_entry_put(ea_block_cache, oe);
+ goto clone_block;
+ }
+ }
ea_bdebug(bs->bh, "modifying in-place");
error = ext4_xattr_set_entry(i, s, handle, inode,
true /* is_block */);
@@ -1890,49 +1912,47 @@ ext4_xattr_block_set(handle_t *handle, struct inode *inode,
if (error)
goto cleanup;
goto inserted;
- } else {
- int offset = (char *)s->here - bs->bh->b_data;
+ }
+clone_block:
+ unlock_buffer(bs->bh);
+ ea_bdebug(bs->bh, "cloning");
+ s->base = kmemdup(BHDR(bs->bh), bs->bh->b_size, GFP_NOFS);
+ error = -ENOMEM;
+ if (s->base == NULL)
+ goto cleanup;
+ s->first = ENTRY(header(s->base)+1);
+ header(s->base)->h_refcount = cpu_to_le32(1);
+ s->here = ENTRY(s->base + offset);
+ s->end = s->base + bs->bh->b_size;
- unlock_buffer(bs->bh);
- ea_bdebug(bs->bh, "cloning");
- s->base = kmemdup(BHDR(bs->bh), bs->bh->b_size, GFP_NOFS);
- error = -ENOMEM;
- if (s->base == NULL)
+ /*
+ * If existing entry points to an xattr inode, we need
+ * to prevent ext4_xattr_set_entry() from decrementing
+ * ref count on it because the reference belongs to the
+ * original block. In this case, make the entry look
+ * like it has an empty value.
+ */
+ if (!s->not_found && s->here->e_value_inum) {
+ ea_ino = le32_to_cpu(s->here->e_value_inum);
+ error = ext4_xattr_inode_iget(inode, ea_ino,
+ le32_to_cpu(s->here->e_hash),
+ &tmp_inode);
+ if (error)
goto cleanup;
- s->first = ENTRY(header(s->base)+1);
- header(s->base)->h_refcount = cpu_to_le32(1);
- s->here = ENTRY(s->base + offset);
- s->end = s->base + bs->bh->b_size;
-
- /*
- * If existing entry points to an xattr inode, we need
- * to prevent ext4_xattr_set_entry() from decrementing
- * ref count on it because the reference belongs to the
- * original block. In this case, make the entry look
- * like it has an empty value.
- */
- if (!s->not_found && s->here->e_value_inum) {
- ea_ino = le32_to_cpu(s->here->e_value_inum);
- error = ext4_xattr_inode_iget(inode, ea_ino,
- le32_to_cpu(s->here->e_hash),
- &tmp_inode);
- if (error)
- goto cleanup;
-
- if (!ext4_test_inode_state(tmp_inode,
- EXT4_STATE_LUSTRE_EA_INODE)) {
- /*
- * Defer quota free call for previous
- * inode until success is guaranteed.
- */
- old_ea_inode_quota = le32_to_cpu(
- s->here->e_value_size);
- }
- iput(tmp_inode);
- s->here->e_value_inum = 0;
- s->here->e_value_size = 0;
+ if (!ext4_test_inode_state(tmp_inode,
+ EXT4_STATE_LUSTRE_EA_INODE)) {
+ /*
+ * Defer quota free call for previous
+ * inode until success is guaranteed.
+ */
+ old_ea_inode_quota = le32_to_cpu(
+ s->here->e_value_size);
}
+ iput(tmp_inode);
+
+ s->here->e_value_inum = 0;
+ s->here->e_value_size = 0;
}
} else {
/* Allocate a buffer where we construct the new block. */
@@ -1999,18 +2019,13 @@ inserted:
lock_buffer(new_bh);
/*
* We have to be careful about races with
- * freeing, rehashing or adding references to
- * xattr block. Once we hold buffer lock xattr
- * block's state is stable so we can check
- * whether the block got freed / rehashed or
- * not. Since we unhash mbcache entry under
- * buffer lock when freeing / rehashing xattr
- * block, checking whether entry is still
- * hashed is reliable. Same rules hold for
- * e_reusable handling.
+ * adding references to xattr block. Once we
+ * hold buffer lock xattr block's state is
+ * stable so we can check the additional
+ * reference fits.
*/
- if (hlist_bl_unhashed(&ce->e_hash_list) ||
- !ce->e_reusable) {
+ ref = le32_to_cpu(BHDR(new_bh)->h_refcount) + 1;
+ if (ref > EXT4_XATTR_REFCOUNT_MAX) {
/*
* Undo everything and check mbcache
* again.
@@ -2025,9 +2040,8 @@ inserted:
new_bh = NULL;
goto inserted;
}
- ref = le32_to_cpu(BHDR(new_bh)->h_refcount) + 1;
BHDR(new_bh)->h_refcount = cpu_to_le32(ref);
- if (ref >= EXT4_XATTR_REFCOUNT_MAX)
+ if (ref == EXT4_XATTR_REFCOUNT_MAX)
ce->e_reusable = 0;
ea_bdebug(new_bh, "reusing; refcount now=%d",
ref);
@@ -2175,8 +2189,9 @@ int ext4_xattr_ibody_find(struct inode *inode, struct ext4_xattr_info *i,
struct ext4_inode *raw_inode;
int error;
- if (EXT4_I(inode)->i_extra_isize == 0)
+ if (!EXT4_INODE_HAS_XATTR_SPACE(inode))
return 0;
+
raw_inode = ext4_raw_inode(&is->iloc);
header = IHDR(inode, raw_inode);
is->s.base = is->s.first = IFIRST(header);
@@ -2204,8 +2219,9 @@ int ext4_xattr_ibody_set(handle_t *handle, struct inode *inode,
struct ext4_xattr_search *s = &is->s;
int error;
- if (EXT4_I(inode)->i_extra_isize == 0)
+ if (!EXT4_INODE_HAS_XATTR_SPACE(inode))
return -ENOSPC;
+
error = ext4_xattr_set_entry(i, s, handle, inode, false /* is_block */);
if (error)
return error;
diff --git a/fs/ext4/xattr.h b/fs/ext4/xattr.h
index 77efb9a627ad..824faf0b15a8 100644
--- a/fs/ext4/xattr.h
+++ b/fs/ext4/xattr.h
@@ -84,7 +84,7 @@ struct ext4_xattr_entry {
/*
* The minimum size of EA value when you start storing it in an external inode
* size of block - size of header - size of 1 entry - 4 null bytes
-*/
+ */
#define EXT4_XATTR_MIN_LARGE_EA_SIZE(b) \
((b) - EXT4_XATTR_LEN(3) - sizeof(struct ext4_xattr_header) - 4)
@@ -95,6 +95,19 @@ struct ext4_xattr_entry {
#define EXT4_ZERO_XATTR_VALUE ((void *)-1)
+/*
+ * If we want to add an xattr to the inode, we should make sure that
+ * i_extra_isize is not 0 and that the inode size is not less than
+ * EXT4_GOOD_OLD_INODE_SIZE + extra_isize + pad.
+ * EXT4_GOOD_OLD_INODE_SIZE extra_isize header entry pad data
+ * |--------------------------|------------|------|---------|---|-------|
+ */
+#define EXT4_INODE_HAS_XATTR_SPACE(inode) \
+ ((EXT4_I(inode)->i_extra_isize != 0) && \
+ (EXT4_GOOD_OLD_INODE_SIZE + EXT4_I(inode)->i_extra_isize + \
+ sizeof(struct ext4_xattr_ibody_header) + EXT4_XATTR_PAD <= \
+ EXT4_INODE_SIZE((inode)->i_sb)))
+
struct ext4_xattr_info {
const char *name;
const void *value;
@@ -178,6 +191,7 @@ extern void ext4_xattr_inode_array_free(struct ext4_xattr_inode_array *array);
extern int ext4_expand_extra_isize_ea(struct inode *inode, int new_extra_isize,
struct ext4_inode *raw_inode, handle_t *handle);
+extern void ext4_evict_ea_inode(struct inode *inode);
extern const struct xattr_handler *ext4_xattr_handlers[];
generated by cgit v1.2.3 (git 2.39.0) at 2025-02-22 23:26:08 +0300