aboutsummaryrefslogtreecommitdiff
path: root/fs/hfs/super.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/hfs/super.c')
-rw-r--r--fs/hfs/super.c265
1 files changed, 190 insertions, 75 deletions
diff --git a/fs/hfs/super.c b/fs/hfs/super.c
index ab783f6afa3..eee7206c38d 100644
--- a/fs/hfs/super.c
+++ b/fs/hfs/super.c
@@ -6,52 +6,33 @@
* This file may be distributed under the terms of the GNU General Public License.
*
* This file contains hfs_read_super(), some of the super_ops and
- * init_module() and cleanup_module(). The remaining super_ops are in
+ * init_hfs_fs() and exit_hfs_fs(). The remaining super_ops are in
* inode.c since they deal with inodes.
*
* Based on the minix file system code, (C) 1991, 1992 by Linus Torvalds
*/
-#include <linux/config.h>
#include <linux/module.h>
#include <linux/blkdev.h>
+#include <linux/mount.h>
#include <linux/init.h>
+#include <linux/nls.h>
#include <linux/parser.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
#include <linux/vfs.h>
#include "hfs_fs.h"
#include "btree.h"
-static kmem_cache_t *hfs_inode_cachep;
+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)
+static int hfs_sync_fs(struct super_block *sb, int wait)
{
- sb->s_dirt = 0;
- if (sb->s_flags & MS_RDONLY)
- return;
- /* sync everything to the buffers */
hfs_mdb_commit(sb);
+ return 0;
}
/*
@@ -63,11 +44,44 @@ static void hfs_write_super(struct super_block *sb)
*/
static void hfs_put_super(struct super_block *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()
*
@@ -77,8 +91,11 @@ static void hfs_put_super(struct super_block *sb)
*
* changed f_files/f_ffree to reflect the fs_ablock/free_ablocks.
*/
-static int hfs_statfs(struct super_block *sb, struct kstatfs *buf)
+static int hfs_statfs(struct dentry *dentry, struct kstatfs *buf)
{
+ struct super_block *sb = dentry->d_sb;
+ u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
+
buf->f_type = HFS_SUPER_MAGIC;
buf->f_bsize = sb->s_blocksize;
buf->f_blocks = (u32)HFS_SB(sb)->fs_ablocks * HFS_SB(sb)->fs_div;
@@ -86,6 +103,8 @@ static int hfs_statfs(struct super_block *sb, struct kstatfs *buf)
buf->f_bavail = buf->f_bfree;
buf->f_files = HFS_SB(sb)->fs_ablocks;
buf->f_ffree = HFS_SB(sb)->free_ablocks;
+ buf->f_fsid.val[0] = (u32)id;
+ buf->f_fsid.val[1] = (u32)(id >> 32);
buf->f_namelen = HFS_NAMELEN;
return 0;
@@ -93,17 +112,17 @@ static int hfs_statfs(struct super_block *sb, 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("HFS-fs warning: 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("HFS-fs: 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;
}
@@ -111,37 +130,73 @@ static int hfs_remount(struct super_block *sb, int *flags, char *data)
return 0;
}
+static int hfs_show_options(struct seq_file *seq, struct dentry *root)
+{
+ 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",
+ 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)
+ seq_printf(seq, ",dir_umask=%o", sbi->s_dir_umask);
+ if (sbi->part >= 0)
+ seq_printf(seq, ",part=%u", sbi->part);
+ if (sbi->session >= 0)
+ seq_printf(seq, ",session=%u", sbi->session);
+ if (sbi->nls_disk)
+ seq_printf(seq, ",codepage=%s", sbi->nls_disk->charset);
+ if (sbi->nls_io)
+ seq_printf(seq, ",iocharset=%s", sbi->nls_io->charset);
+ if (sbi->s_quiet)
+ seq_printf(seq, ",quiet");
+ return 0;
+}
+
static struct inode *hfs_alloc_inode(struct super_block *sb)
{
struct hfs_inode_info *i;
- i = kmem_cache_alloc(hfs_inode_cachep, SLAB_KERNEL);
+ i = kmem_cache_alloc(hfs_inode_cachep, GFP_KERNEL);
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 struct super_operations hfs_super_operations = {
+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,
- .clear_inode = hfs_clear_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,
+ .show_options = hfs_show_options,
};
enum {
opt_uid, opt_gid, opt_umask, opt_file_umask, opt_dir_umask,
opt_part, opt_session, opt_type, opt_creator, opt_quiet,
+ opt_codepage, opt_iocharset,
opt_err
};
-static match_table_t tokens = {
+static const match_table_t tokens = {
{ opt_uid, "uid=%u" },
{ opt_gid, "gid=%u" },
{ opt_umask, "umask=%o" },
@@ -152,6 +207,8 @@ static match_table_t tokens = {
{ opt_type, "type=%s" },
{ opt_creator, "creator=%s" },
{ opt_quiet, "quiet" },
+ { opt_codepage, "codepage=%s" },
+ { opt_iocharset, "iocharset=%s" },
{ opt_err, NULL }
};
@@ -176,8 +233,8 @@ static int parse_options(char *options, struct hfs_sb_info *hsb)
int tmp, token;
/* initialize the sb with defaults */
- hsb->s_uid = current->uid;
- hsb->s_gid = current->gid;
+ hsb->s_uid = current_uid();
+ hsb->s_gid = current_gid();
hsb->s_file_umask = 0133;
hsb->s_dir_umask = 0022;
hsb->s_type = hsb->s_creator = cpu_to_be32(0x3f3f3f3f); /* == '????' */
@@ -196,21 +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("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("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("HFS: umask requires a value\n");
+ pr_err("umask requires a value\n");
return 0;
}
hsb->s_file_umask = (umode_t)tmp;
@@ -218,50 +283,87 @@ static int parse_options(char *options, struct hfs_sb_info *hsb)
break;
case opt_file_umask:
if (match_octal(&args[0], &tmp)) {
- printk("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("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("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("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("HFS+-fs: 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("HFS+-fs: creator requires a 4 character value\n");
+ pr_err("creator requires a 4 character value\n");
return 0;
}
break;
case opt_quiet:
hsb->s_quiet = 1;
break;
+ case opt_codepage:
+ if (hsb->nls_disk) {
+ 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) {
+ pr_err("unable to load codepage \"%s\"\n", p);
+ kfree(p);
+ return 0;
+ }
+ kfree(p);
+ break;
+ case opt_iocharset:
+ if (hsb->nls_io) {
+ 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) {
+ pr_err("unable to load iocharset \"%s\"\n", p);
+ kfree(p);
+ return 0;
+ }
+ kfree(p);
+ break;
default:
return 0;
}
}
+ if (hsb->nls_disk && !hsb->nls_io) {
+ hsb->nls_io = load_nls_default();
+ if (!hsb->nls_io) {
+ pr_err("unable to load default iocharset\n");
+ return 0;
+ }
+ }
hsb->s_dir_umask &= 0777;
hsb->s_file_umask &= 0577;
@@ -287,84 +389,92 @@ static int hfs_fill_super(struct super_block *sb, void *data, int silent)
struct inode *root_inode;
int res;
- sbi = kmalloc(sizeof(struct hfs_sb_info), GFP_KERNEL);
+ sbi = kzalloc(sizeof(struct hfs_sb_info), GFP_KERNEL);
if (!sbi)
return -ENOMEM;
+
+ sbi->sb = sb;
sb->s_fs_info = sbi;
- memset(sbi, 0, sizeof(struct hfs_sb_info));
- INIT_HLIST_HEAD(&sbi->rsrc_inodes);
+ spin_lock_init(&sbi->work_lock);
+ INIT_DELAYED_WORK(&sbi->mdb_work, flush_mdb);
res = -EINVAL;
if (!parse_options((char *)data, sbi)) {
- hfs_warn("hfs_fs: unable to parse mount options.\n");
+ pr_err("unable to parse mount options\n");
goto bail;
}
sb->s_op = &hfs_super_operations;
sb->s_flags |= MS_NODIRATIME;
- init_MUTEX(&sbi->bitmap_lock);
+ mutex_init(&sbi->bitmap_lock);
res = hfs_mdb_get(sb);
if (res) {
if (!silent)
- hfs_warn("VFS: 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 (!res) {
+ if (fd.entrylength > sizeof(rec) || fd.entrylength < 0) {
+ res = -EIO;
+ goto bail;
+ }
hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, fd.entrylength);
+ }
if (res) {
hfs_find_exit(&fd);
goto bail_no_root;
}
+ res = -EINVAL;
root_inode = hfs_iget(sb, &fd.search_key->cat, &rec);
hfs_find_exit(&fd);
if (!root_inode)
goto bail_no_root;
- sb->s_root = d_alloc_root(root_inode);
+ sb->s_d_op = &hfs_dentry_operations;
+ res = -ENOMEM;
+ 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:
- hfs_warn("hfs_fs: get root inode failed.\n");
+ pr_err("get root inode failed\n");
bail:
hfs_mdb_put(sb);
return res;
}
-static struct super_block *hfs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static struct dentry *hfs_mount(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, hfs_fill_super);
+ return mount_bdev(fs_type, flags, dev_name, data, hfs_fill_super);
}
static struct file_system_type hfs_fs_type = {
.owner = THIS_MODULE,
.name = "hfs",
- .get_sb = hfs_get_sb,
+ .mount = hfs_mount,
.kill_sb = kill_block_super,
.fs_flags = FS_REQUIRES_DEV,
};
+MODULE_ALIAS_FS("hfs");
-static void hfs_init_once(void *p, kmem_cache_t *cachep, unsigned long flags)
+static void hfs_init_once(void *p)
{
struct hfs_inode_info *i = p;
- if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == SLAB_CTOR_CONSTRUCTOR)
- inode_init_once(&i->vfs_inode);
+ inode_init_once(&i->vfs_inode);
}
static int __init init_hfs_fs(void)
@@ -373,7 +483,7 @@ static int __init init_hfs_fs(void)
hfs_inode_cachep = kmem_cache_create("hfs_inode_cache",
sizeof(struct hfs_inode_info), 0, SLAB_HWCACHE_ALIGN,
- hfs_init_once, NULL);
+ hfs_init_once);
if (!hfs_inode_cachep)
return -ENOMEM;
err = register_filesystem(&hfs_fs_type);
@@ -385,8 +495,13 @@ static int __init init_hfs_fs(void)
static void __exit exit_hfs_fs(void)
{
unregister_filesystem(&hfs_fs_type);
- if (kmem_cache_destroy(hfs_inode_cachep))
- printk(KERN_INFO "hfs_inode_cache: not all structures were freed\n");
+
+ /*
+ * Make sure all delayed rcu free inodes are flushed before we
+ * destroy cache.
+ */
+ rcu_barrier();
+ kmem_cache_destroy(hfs_inode_cachep);
}
module_init(init_hfs_fs)
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-08 10:00:18 +0000