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Diffstat (limited to 'fs/hfs/super.c')
-rw-r--r--fs/hfs/super.c161
1 files changed, 91 insertions, 70 deletions
diff --git a/fs/hfs/super.c b/fs/hfs/super.c
index 4824c27cebb..eee7206c38d 100644
--- a/fs/hfs/super.c
+++ b/fs/hfs/super.c
@@ -29,43 +29,9 @@ static struct kmem_cache *hfs_inode_cachep;
MODULE_LICENSE("GPL");
-/*
- * hfs_write_super()
- *
- * Description:
- * This function is called by the VFS only. When the filesystem
- * is mounted r/w it updates the MDB on disk.
- * Input Variable(s):
- * struct super_block *sb: Pointer to the hfs superblock
- * Output Variable(s):
- * NONE
- * Returns:
- * void
- * Preconditions:
- * 'sb' points to a "valid" (struct super_block).
- * Postconditions:
- * The MDB is marked 'unsuccessfully unmounted' by clearing bit 8 of drAtrb
- * (hfs_put_super() must set this flag!). Some MDB fields are updated
- * and the MDB buffer is written to disk by calling hfs_mdb_commit().
- */
-static void hfs_write_super(struct super_block *sb)
-{
- lock_super(sb);
- sb->s_dirt = 0;
-
- /* sync everything to the buffers */
- if (!(sb->s_flags & MS_RDONLY))
- hfs_mdb_commit(sb);
- unlock_super(sb);
-}
-
static int hfs_sync_fs(struct super_block *sb, int wait)
{
- lock_super(sb);
hfs_mdb_commit(sb);
- sb->s_dirt = 0;
- unlock_super(sb);
-
return 0;
}
@@ -78,13 +44,44 @@ static int hfs_sync_fs(struct super_block *sb, int wait)
*/
static void hfs_put_super(struct super_block *sb)
{
- if (sb->s_dirt)
- hfs_write_super(sb);
+ cancel_delayed_work_sync(&HFS_SB(sb)->mdb_work);
hfs_mdb_close(sb);
/* release the MDB's resources */
hfs_mdb_put(sb);
}
+static void flush_mdb(struct work_struct *work)
+{
+ struct hfs_sb_info *sbi;
+ struct super_block *sb;
+
+ sbi = container_of(work, struct hfs_sb_info, mdb_work.work);
+ sb = sbi->sb;
+
+ spin_lock(&sbi->work_lock);
+ sbi->work_queued = 0;
+ spin_unlock(&sbi->work_lock);
+
+ hfs_mdb_commit(sb);
+}
+
+void hfs_mark_mdb_dirty(struct super_block *sb)
+{
+ struct hfs_sb_info *sbi = HFS_SB(sb);
+ unsigned long delay;
+
+ if (sb->s_flags & MS_RDONLY)
+ return;
+
+ spin_lock(&sbi->work_lock);
+ if (!sbi->work_queued) {
+ delay = msecs_to_jiffies(dirty_writeback_interval * 10);
+ queue_delayed_work(system_long_wq, &sbi->mdb_work, delay);
+ sbi->work_queued = 1;
+ }
+ spin_unlock(&sbi->work_lock);
+}
+
/*
* hfs_statfs()
*
@@ -115,17 +112,17 @@ static int hfs_statfs(struct dentry *dentry, struct kstatfs *buf)
static int hfs_remount(struct super_block *sb, int *flags, char *data)
{
+ sync_filesystem(sb);
*flags |= MS_NODIRATIME;
if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
return 0;
if (!(*flags & MS_RDONLY)) {
if (!(HFS_SB(sb)->mdb->drAtrb & cpu_to_be16(HFS_SB_ATTRIB_UNMNT))) {
- printk(KERN_WARNING "hfs: filesystem was not cleanly unmounted, "
- "running fsck.hfs is recommended. leaving read-only.\n");
+ pr_warn("filesystem was not cleanly unmounted, running fsck.hfs is recommended. leaving read-only.\n");
sb->s_flags |= MS_RDONLY;
*flags |= MS_RDONLY;
} else if (HFS_SB(sb)->mdb->drAtrb & cpu_to_be16(HFS_SB_ATTRIB_SLOCK)) {
- printk(KERN_WARNING "hfs: filesystem is marked locked, leaving read-only.\n");
+ pr_warn("filesystem is marked locked, leaving read-only.\n");
sb->s_flags |= MS_RDONLY;
*flags |= MS_RDONLY;
}
@@ -133,15 +130,17 @@ static int hfs_remount(struct super_block *sb, int *flags, char *data)
return 0;
}
-static int hfs_show_options(struct seq_file *seq, struct vfsmount *mnt)
+static int hfs_show_options(struct seq_file *seq, struct dentry *root)
{
- struct hfs_sb_info *sbi = HFS_SB(mnt->mnt_sb);
+ struct hfs_sb_info *sbi = HFS_SB(root->d_sb);
if (sbi->s_creator != cpu_to_be32(0x3f3f3f3f))
seq_printf(seq, ",creator=%.4s", (char *)&sbi->s_creator);
if (sbi->s_type != cpu_to_be32(0x3f3f3f3f))
seq_printf(seq, ",type=%.4s", (char *)&sbi->s_type);
- seq_printf(seq, ",uid=%u,gid=%u", sbi->s_uid, sbi->s_gid);
+ seq_printf(seq, ",uid=%u,gid=%u",
+ from_kuid_munged(&init_user_ns, sbi->s_uid),
+ from_kgid_munged(&init_user_ns, sbi->s_gid));
if (sbi->s_file_umask != 0133)
seq_printf(seq, ",file_umask=%o", sbi->s_file_umask);
if (sbi->s_dir_umask != 0022)
@@ -167,18 +166,23 @@ static struct inode *hfs_alloc_inode(struct super_block *sb)
return i ? &i->vfs_inode : NULL;
}
-static void hfs_destroy_inode(struct inode *inode)
+static void hfs_i_callback(struct rcu_head *head)
{
+ struct inode *inode = container_of(head, struct inode, i_rcu);
kmem_cache_free(hfs_inode_cachep, HFS_I(inode));
}
+static void hfs_destroy_inode(struct inode *inode)
+{
+ call_rcu(&inode->i_rcu, hfs_i_callback);
+}
+
static const struct super_operations hfs_super_operations = {
.alloc_inode = hfs_alloc_inode,
.destroy_inode = hfs_destroy_inode,
.write_inode = hfs_write_inode,
.evict_inode = hfs_evict_inode,
.put_super = hfs_put_super,
- .write_super = hfs_write_super,
.sync_fs = hfs_sync_fs,
.statfs = hfs_statfs,
.remount_fs = hfs_remount,
@@ -249,21 +253,29 @@ static int parse_options(char *options, struct hfs_sb_info *hsb)
switch (token) {
case opt_uid:
if (match_int(&args[0], &tmp)) {
- printk(KERN_ERR "hfs: uid requires an argument\n");
+ pr_err("uid requires an argument\n");
+ return 0;
+ }
+ hsb->s_uid = make_kuid(current_user_ns(), (uid_t)tmp);
+ if (!uid_valid(hsb->s_uid)) {
+ pr_err("invalid uid %d\n", tmp);
return 0;
}
- hsb->s_uid = (uid_t)tmp;
break;
case opt_gid:
if (match_int(&args[0], &tmp)) {
- printk(KERN_ERR "hfs: gid requires an argument\n");
+ pr_err("gid requires an argument\n");
+ return 0;
+ }
+ hsb->s_gid = make_kgid(current_user_ns(), (gid_t)tmp);
+ if (!gid_valid(hsb->s_gid)) {
+ pr_err("invalid gid %d\n", tmp);
return 0;
}
- hsb->s_gid = (gid_t)tmp;
break;
case opt_umask:
if (match_octal(&args[0], &tmp)) {
- printk(KERN_ERR "hfs: umask requires a value\n");
+ pr_err("umask requires a value\n");
return 0;
}
hsb->s_file_umask = (umode_t)tmp;
@@ -271,39 +283,39 @@ static int parse_options(char *options, struct hfs_sb_info *hsb)
break;
case opt_file_umask:
if (match_octal(&args[0], &tmp)) {
- printk(KERN_ERR "hfs: file_umask requires a value\n");
+ pr_err("file_umask requires a value\n");
return 0;
}
hsb->s_file_umask = (umode_t)tmp;
break;
case opt_dir_umask:
if (match_octal(&args[0], &tmp)) {
- printk(KERN_ERR "hfs: dir_umask requires a value\n");
+ pr_err("dir_umask requires a value\n");
return 0;
}
hsb->s_dir_umask = (umode_t)tmp;
break;
case opt_part:
if (match_int(&args[0], &hsb->part)) {
- printk(KERN_ERR "hfs: part requires an argument\n");
+ pr_err("part requires an argument\n");
return 0;
}
break;
case opt_session:
if (match_int(&args[0], &hsb->session)) {
- printk(KERN_ERR "hfs: session requires an argument\n");
+ pr_err("session requires an argument\n");
return 0;
}
break;
case opt_type:
if (match_fourchar(&args[0], &hsb->s_type)) {
- printk(KERN_ERR "hfs: type requires a 4 character value\n");
+ pr_err("type requires a 4 character value\n");
return 0;
}
break;
case opt_creator:
if (match_fourchar(&args[0], &hsb->s_creator)) {
- printk(KERN_ERR "hfs: creator requires a 4 character value\n");
+ pr_err("creator requires a 4 character value\n");
return 0;
}
break;
@@ -312,14 +324,14 @@ static int parse_options(char *options, struct hfs_sb_info *hsb)
break;
case opt_codepage:
if (hsb->nls_disk) {
- printk(KERN_ERR "hfs: unable to change codepage\n");
+ pr_err("unable to change codepage\n");
return 0;
}
p = match_strdup(&args[0]);
if (p)
hsb->nls_disk = load_nls(p);
if (!hsb->nls_disk) {
- printk(KERN_ERR "hfs: unable to load codepage \"%s\"\n", p);
+ pr_err("unable to load codepage \"%s\"\n", p);
kfree(p);
return 0;
}
@@ -327,14 +339,14 @@ static int parse_options(char *options, struct hfs_sb_info *hsb)
break;
case opt_iocharset:
if (hsb->nls_io) {
- printk(KERN_ERR "hfs: unable to change iocharset\n");
+ pr_err("unable to change iocharset\n");
return 0;
}
p = match_strdup(&args[0]);
if (p)
hsb->nls_io = load_nls(p);
if (!hsb->nls_io) {
- printk(KERN_ERR "hfs: unable to load iocharset \"%s\"\n", p);
+ pr_err("unable to load iocharset \"%s\"\n", p);
kfree(p);
return 0;
}
@@ -348,7 +360,7 @@ static int parse_options(char *options, struct hfs_sb_info *hsb)
if (hsb->nls_disk && !hsb->nls_io) {
hsb->nls_io = load_nls_default();
if (!hsb->nls_io) {
- printk(KERN_ERR "hfs: unable to load default iocharset\n");
+ pr_err("unable to load default iocharset\n");
return 0;
}
}
@@ -381,11 +393,14 @@ static int hfs_fill_super(struct super_block *sb, void *data, int silent)
if (!sbi)
return -ENOMEM;
+ sbi->sb = sb;
sb->s_fs_info = sbi;
+ spin_lock_init(&sbi->work_lock);
+ INIT_DELAYED_WORK(&sbi->mdb_work, flush_mdb);
res = -EINVAL;
if (!parse_options((char *)data, sbi)) {
- printk(KERN_ERR "hfs: unable to parse mount options.\n");
+ pr_err("unable to parse mount options\n");
goto bail;
}
@@ -396,14 +411,16 @@ static int hfs_fill_super(struct super_block *sb, void *data, int silent)
res = hfs_mdb_get(sb);
if (res) {
if (!silent)
- printk(KERN_WARNING "hfs: can't find a HFS filesystem on dev %s.\n",
+ pr_warn("can't find a HFS filesystem on dev %s\n",
hfs_mdb_name(sb));
res = -EINVAL;
goto bail;
}
/* try to get the root inode */
- hfs_find_init(HFS_SB(sb)->cat_tree, &fd);
+ res = hfs_find_init(HFS_SB(sb)->cat_tree, &fd);
+ if (res)
+ goto bail_no_root;
res = hfs_cat_find_brec(sb, HFS_ROOT_CNID, &fd);
if (!res) {
if (fd.entrylength > sizeof(rec) || fd.entrylength < 0) {
@@ -422,20 +439,17 @@ static int hfs_fill_super(struct super_block *sb, void *data, int silent)
if (!root_inode)
goto bail_no_root;
+ sb->s_d_op = &hfs_dentry_operations;
res = -ENOMEM;
- sb->s_root = d_alloc_root(root_inode);
+ sb->s_root = d_make_root(root_inode);
if (!sb->s_root)
- goto bail_iput;
-
- sb->s_root->d_op = &hfs_dentry_operations;
+ goto bail_no_root;
/* everything's okay */
return 0;
-bail_iput:
- iput(root_inode);
bail_no_root:
- printk(KERN_ERR "hfs: get root inode failed.\n");
+ pr_err("get root inode failed\n");
bail:
hfs_mdb_put(sb);
return res;
@@ -454,6 +468,7 @@ static struct file_system_type hfs_fs_type = {
.kill_sb = kill_block_super,
.fs_flags = FS_REQUIRES_DEV,
};
+MODULE_ALIAS_FS("hfs");
static void hfs_init_once(void *p)
{
@@ -480,6 +495,12 @@ static int __init init_hfs_fs(void)
static void __exit exit_hfs_fs(void)
{
unregister_filesystem(&hfs_fs_type);
+
+ /*
+ * Make sure all delayed rcu free inodes are flushed before we
+ * destroy cache.
+ */
+ rcu_barrier();
kmem_cache_destroy(hfs_inode_cachep);
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-03 18:26:42 +0000