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Diffstat (limited to 'fs/inode.c')
-rw-r--r--fs/inode.c65
1 files changed, 40 insertions, 25 deletions
diff --git a/fs/inode.c b/fs/inode.c
index c99163b1b310..d6dfb09c8280 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -165,7 +165,7 @@ int inode_init_always(struct super_block *sb, struct inode *inode)
mapping->host = inode;
mapping->flags = 0;
mapping_set_gfp_mask(mapping, GFP_HIGHUSER_MOVABLE);
- mapping->assoc_mapping = NULL;
+ mapping->private_data = NULL;
mapping->backing_dev_info = &default_backing_dev_info;
mapping->writeback_index = 0;
@@ -182,7 +182,7 @@ int inode_init_always(struct super_block *sb, struct inode *inode)
}
inode->i_private = NULL;
inode->i_mapping = mapping;
- INIT_LIST_HEAD(&inode->i_dentry); /* buggered by rcu freeing */
+ INIT_HLIST_HEAD(&inode->i_dentry); /* buggered by rcu freeing */
#ifdef CONFIG_FS_POSIX_ACL
inode->i_acl = inode->i_default_acl = ACL_NOT_CACHED;
#endif
@@ -333,8 +333,10 @@ EXPORT_SYMBOL(set_nlink);
*/
void inc_nlink(struct inode *inode)
{
- if (WARN_ON(inode->i_nlink == 0))
+ if (unlikely(inode->i_nlink == 0)) {
+ WARN_ON(!(inode->i_state & I_LINKABLE));
atomic_long_dec(&inode->i_sb->s_remove_count);
+ }
inode->__i_nlink++;
}
@@ -348,7 +350,7 @@ void address_space_init_once(struct address_space *mapping)
mutex_init(&mapping->i_mmap_mutex);
INIT_LIST_HEAD(&mapping->private_list);
spin_lock_init(&mapping->private_lock);
- INIT_RAW_PRIO_TREE_ROOT(&mapping->i_mmap);
+ mapping->i_mmap = RB_ROOT;
INIT_LIST_HEAD(&mapping->i_mmap_nonlinear);
}
EXPORT_SYMBOL(address_space_init_once);
@@ -408,6 +410,19 @@ static void inode_lru_list_add(struct inode *inode)
spin_unlock(&inode->i_sb->s_inode_lru_lock);
}
+/*
+ * Add inode to LRU if needed (inode is unused and clean).
+ *
+ * Needs inode->i_lock held.
+ */
+void inode_add_lru(struct inode *inode)
+{
+ if (!(inode->i_state & (I_DIRTY | I_SYNC | I_FREEING | I_WILL_FREE)) &&
+ !atomic_read(&inode->i_count) && inode->i_sb->s_flags & MS_ACTIVE)
+ inode_lru_list_add(inode);
+}
+
+
static void inode_lru_list_del(struct inode *inode)
{
spin_lock(&inode->i_sb->s_inode_lru_lock);
@@ -712,7 +727,7 @@ void prune_icache_sb(struct super_block *sb, int nr_to_scan)
* inode to the back of the list so we don't spin on it.
*/
if (!spin_trylock(&inode->i_lock)) {
- list_move_tail(&inode->i_lru, &sb->s_inode_lru);
+ list_move(&inode->i_lru, &sb->s_inode_lru);
continue;
}
@@ -785,11 +800,10 @@ static struct inode *find_inode(struct super_block *sb,
int (*test)(struct inode *, void *),
void *data)
{
- struct hlist_node *node;
struct inode *inode = NULL;
repeat:
- hlist_for_each_entry(inode, node, head, i_hash) {
+ hlist_for_each_entry(inode, head, i_hash) {
spin_lock(&inode->i_lock);
if (inode->i_sb != sb) {
spin_unlock(&inode->i_lock);
@@ -817,11 +831,10 @@ repeat:
static struct inode *find_inode_fast(struct super_block *sb,
struct hlist_head *head, unsigned long ino)
{
- struct hlist_node *node;
struct inode *inode = NULL;
repeat:
- hlist_for_each_entry(inode, node, head, i_hash) {
+ hlist_for_each_entry(inode, head, i_hash) {
spin_lock(&inode->i_lock);
if (inode->i_ino != ino) {
spin_unlock(&inode->i_lock);
@@ -1119,11 +1132,10 @@ EXPORT_SYMBOL(iget_locked);
static int test_inode_iunique(struct super_block *sb, unsigned long ino)
{
struct hlist_head *b = inode_hashtable + hash(sb, ino);
- struct hlist_node *node;
struct inode *inode;
spin_lock(&inode_hash_lock);
- hlist_for_each_entry(inode, node, b, i_hash) {
+ hlist_for_each_entry(inode, b, i_hash) {
if (inode->i_ino == ino && inode->i_sb == sb) {
spin_unlock(&inode_hash_lock);
return 0;
@@ -1278,10 +1290,9 @@ int insert_inode_locked(struct inode *inode)
struct hlist_head *head = inode_hashtable + hash(sb, ino);
while (1) {
- struct hlist_node *node;
struct inode *old = NULL;
spin_lock(&inode_hash_lock);
- hlist_for_each_entry(old, node, head, i_hash) {
+ hlist_for_each_entry(old, head, i_hash) {
if (old->i_ino != ino)
continue;
if (old->i_sb != sb)
@@ -1293,7 +1304,7 @@ int insert_inode_locked(struct inode *inode)
}
break;
}
- if (likely(!node)) {
+ if (likely(!old)) {
spin_lock(&inode->i_lock);
inode->i_state |= I_NEW;
hlist_add_head(&inode->i_hash, head);
@@ -1321,11 +1332,10 @@ int insert_inode_locked4(struct inode *inode, unsigned long hashval,
struct hlist_head *head = inode_hashtable + hash(sb, hashval);
while (1) {
- struct hlist_node *node;
struct inode *old = NULL;
spin_lock(&inode_hash_lock);
- hlist_for_each_entry(old, node, head, i_hash) {
+ hlist_for_each_entry(old, head, i_hash) {
if (old->i_sb != sb)
continue;
if (!test(old, data))
@@ -1337,7 +1347,7 @@ int insert_inode_locked4(struct inode *inode, unsigned long hashval,
}
break;
}
- if (likely(!node)) {
+ if (likely(!old)) {
spin_lock(&inode->i_lock);
inode->i_state |= I_NEW;
hlist_add_head(&inode->i_hash, head);
@@ -1390,8 +1400,7 @@ static void iput_final(struct inode *inode)
if (!drop && (sb->s_flags & MS_ACTIVE)) {
inode->i_state |= I_REFERENCED;
- if (!(inode->i_state & (I_DIRTY|I_SYNC)))
- inode_lru_list_add(inode);
+ inode_add_lru(inode);
spin_unlock(&inode->i_lock);
return;
}
@@ -1542,18 +1551,24 @@ void touch_atime(struct path *path)
if (timespec_equal(&inode->i_atime, &now))
return;
- if (mnt_want_write(mnt))
+ if (!sb_start_write_trylock(inode->i_sb))
return;
+ if (__mnt_want_write(mnt))
+ goto skip_update;
/*
* File systems can error out when updating inodes if they need to
* allocate new space to modify an inode (such is the case for
* Btrfs), but since we touch atime while walking down the path we
* really don't care if we failed to update the atime of the file,
* so just ignore the return value.
+ * We may also fail on filesystems that have the ability to make parts
+ * of the fs read only, e.g. subvolumes in Btrfs.
*/
update_time(inode, &now, S_ATIME);
- mnt_drop_write(mnt);
+ __mnt_drop_write(mnt);
+skip_update:
+ sb_end_write(inode->i_sb);
}
EXPORT_SYMBOL(touch_atime);
@@ -1637,7 +1652,7 @@ EXPORT_SYMBOL(file_remove_suid);
int file_update_time(struct file *file)
{
- struct inode *inode = file->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(file);
struct timespec now;
int sync_it = 0;
int ret;
@@ -1660,11 +1675,11 @@ int file_update_time(struct file *file)
return 0;
/* Finally allowed to write? Takes lock. */
- if (mnt_want_write_file(file))
+ if (__mnt_want_write_file(file))
return 0;
ret = update_time(inode, &now, sync_it);
- mnt_drop_write_file(file);
+ __mnt_drop_write_file(file);
return ret;
}
@@ -1790,7 +1805,7 @@ void init_special_inode(struct inode *inode, umode_t mode, dev_t rdev)
inode->i_fop = &def_blk_fops;
inode->i_rdev = rdev;
} else if (S_ISFIFO(mode))
- inode->i_fop = &def_fifo_fops;
+ inode->i_fop = &pipefifo_fops;
else if (S_ISSOCK(mode))
inode->i_fop = &bad_sock_fops;
else
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-17 10:55:50 +0000