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-rw-r--r--fs/minix/inode.c147
1 files changed, 97 insertions, 50 deletions
diff --git a/fs/minix/inode.c b/fs/minix/inode.c
index 74ea82d7216..f007a335557 100644
--- a/fs/minix/inode.c
+++ b/fs/minix/inode.c
@@ -17,17 +17,24 @@
#include <linux/init.h>
#include <linux/highuid.h>
#include <linux/vfs.h>
+#include <linux/writeback.h>
-static int minix_write_inode(struct inode * inode, int wait);
+static int minix_write_inode(struct inode *inode,
+ struct writeback_control *wbc);
static int minix_statfs(struct dentry *dentry, struct kstatfs *buf);
static int minix_remount (struct super_block * sb, int * flags, char * data);
-static void minix_delete_inode(struct inode *inode)
+static void minix_evict_inode(struct inode *inode)
{
- truncate_inode_pages(&inode->i_data, 0);
- inode->i_size = 0;
- minix_truncate(inode);
- minix_free_inode(inode);
+ truncate_inode_pages_final(&inode->i_data);
+ if (!inode->i_nlink) {
+ inode->i_size = 0;
+ minix_truncate(inode);
+ }
+ invalidate_inode_buffers(inode);
+ clear_inode(inode);
+ if (!inode->i_nlink)
+ minix_free_inode(inode);
}
static void minix_put_super(struct super_block *sb)
@@ -61,11 +68,17 @@ static struct inode *minix_alloc_inode(struct super_block *sb)
return &ei->vfs_inode;
}
-static void minix_destroy_inode(struct inode *inode)
+static void minix_i_callback(struct rcu_head *head)
{
+ struct inode *inode = container_of(head, struct inode, i_rcu);
kmem_cache_free(minix_inode_cachep, minix_i(inode));
}
+static void minix_destroy_inode(struct inode *inode)
+{
+ call_rcu(&inode->i_rcu, minix_i_callback);
+}
+
static void init_once(void *foo)
{
struct minix_inode_info *ei = (struct minix_inode_info *) foo;
@@ -73,7 +86,7 @@ static void init_once(void *foo)
inode_init_once(&ei->vfs_inode);
}
-static int init_inodecache(void)
+static int __init init_inodecache(void)
{
minix_inode_cachep = kmem_cache_create("minix_inode_cache",
sizeof(struct minix_inode_info),
@@ -87,6 +100,11 @@ static int init_inodecache(void)
static void destroy_inodecache(void)
{
+ /*
+ * Make sure all delayed rcu free inodes are flushed before we
+ * destroy cache.
+ */
+ rcu_barrier();
kmem_cache_destroy(minix_inode_cachep);
}
@@ -94,7 +112,7 @@ static const struct super_operations minix_sops = {
.alloc_inode = minix_alloc_inode,
.destroy_inode = minix_destroy_inode,
.write_inode = minix_write_inode,
- .delete_inode = minix_delete_inode,
+ .evict_inode = minix_evict_inode,
.put_super = minix_put_super,
.statfs = minix_statfs,
.remount_fs = minix_remount,
@@ -105,6 +123,7 @@ static int minix_remount (struct super_block * sb, int * flags, char * data)
struct minix_sb_info * sbi = minix_sb(sb);
struct minix_super_block * ms;
+ sync_filesystem(sb);
ms = sbi->s_ms;
if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
return 0;
@@ -177,24 +196,24 @@ static int minix_fill_super(struct super_block *s, void *data, int silent)
sbi->s_version = MINIX_V1;
sbi->s_dirsize = 16;
sbi->s_namelen = 14;
- sbi->s_link_max = MINIX_LINK_MAX;
+ s->s_max_links = MINIX_LINK_MAX;
} else if (s->s_magic == MINIX_SUPER_MAGIC2) {
sbi->s_version = MINIX_V1;
sbi->s_dirsize = 32;
sbi->s_namelen = 30;
- sbi->s_link_max = MINIX_LINK_MAX;
+ s->s_max_links = MINIX_LINK_MAX;
} else if (s->s_magic == MINIX2_SUPER_MAGIC) {
sbi->s_version = MINIX_V2;
sbi->s_nzones = ms->s_zones;
sbi->s_dirsize = 16;
sbi->s_namelen = 14;
- sbi->s_link_max = MINIX2_LINK_MAX;
+ s->s_max_links = MINIX2_LINK_MAX;
} else if (s->s_magic == MINIX2_SUPER_MAGIC2) {
sbi->s_version = MINIX_V2;
sbi->s_nzones = ms->s_zones;
sbi->s_dirsize = 32;
sbi->s_namelen = 30;
- sbi->s_link_max = MINIX2_LINK_MAX;
+ s->s_max_links = MINIX2_LINK_MAX;
} else if ( *(__u16 *)(bh->b_data + 24) == MINIX3_SUPER_MAGIC) {
m3s = (struct minix3_super_block *) bh->b_data;
s->s_magic = m3s->s_magic;
@@ -208,9 +227,9 @@ static int minix_fill_super(struct super_block *s, void *data, int silent)
sbi->s_dirsize = 64;
sbi->s_namelen = 60;
sbi->s_version = MINIX_V3;
- sbi->s_link_max = MINIX2_LINK_MAX;
sbi->s_mount_state = MINIX_VALID_FS;
sb_set_blocksize(s, m3s->s_blocksize);
+ s->s_max_links = MINIX2_LINK_MAX;
} else
goto out_no_fs;
@@ -241,6 +260,26 @@ static int minix_fill_super(struct super_block *s, void *data, int silent)
minix_set_bit(0,sbi->s_imap[0]->b_data);
minix_set_bit(0,sbi->s_zmap[0]->b_data);
+ /* Apparently minix can create filesystems that allocate more blocks for
+ * the bitmaps than needed. We simply ignore that, but verify it didn't
+ * create one with not enough blocks and bail out if so.
+ */
+ block = minix_blocks_needed(sbi->s_ninodes, s->s_blocksize);
+ if (sbi->s_imap_blocks < block) {
+ printk("MINIX-fs: file system does not have enough "
+ "imap blocks allocated. Refusing to mount\n");
+ goto out_no_bitmap;
+ }
+
+ block = minix_blocks_needed(
+ (sbi->s_nzones - (sbi->s_firstdatazone + 1)),
+ s->s_blocksize);
+ if (sbi->s_zmap_blocks < block) {
+ printk("MINIX-fs: file system does not have enough "
+ "zmap blocks allocated. Refusing to mount.\n");
+ goto out_no_bitmap;
+ }
+
/* set up enough so that it can read an inode */
s->s_op = &minix_sops;
root_inode = minix_iget(s, MINIX_ROOT_INO);
@@ -250,9 +289,9 @@ static int minix_fill_super(struct super_block *s, void *data, int silent)
}
ret = -ENOMEM;
- s->s_root = d_alloc_root(root_inode);
+ s->s_root = d_make_root(root_inode);
if (!s->s_root)
- goto out_iput;
+ goto out_no_root;
if (!(s->s_flags & MS_RDONLY)) {
if (sbi->s_version != MINIX_V3) /* s_state is now out from V3 sb */
@@ -262,14 +301,11 @@ static int minix_fill_super(struct super_block *s, void *data, int silent)
if (!(sbi->s_mount_state & MINIX_VALID_FS))
printk("MINIX-fs: mounting unchecked file system, "
"running fsck is recommended\n");
- else if (sbi->s_mount_state & MINIX_ERROR_FS)
+ else if (sbi->s_mount_state & MINIX_ERROR_FS)
printk("MINIX-fs: mounting file system with errors, "
"running fsck is recommended\n");
- return 0;
-out_iput:
- iput(root_inode);
- goto out_freemap;
+ return 0;
out_no_root:
if (!silent)
@@ -325,10 +361,10 @@ static int minix_statfs(struct dentry *dentry, struct kstatfs *buf)
buf->f_type = sb->s_magic;
buf->f_bsize = sb->s_blocksize;
buf->f_blocks = (sbi->s_nzones - sbi->s_firstdatazone) << sbi->s_log_zone_size;
- buf->f_bfree = minix_count_free_blocks(sbi);
+ buf->f_bfree = minix_count_free_blocks(sb);
buf->f_bavail = buf->f_bfree;
buf->f_files = sbi->s_ninodes;
- buf->f_ffree = minix_count_free_inodes(sbi);
+ buf->f_ffree = minix_count_free_inodes(sb);
buf->f_namelen = sbi->s_namelen;
buf->f_fsid.val[0] = (u32)id;
buf->f_fsid.val[1] = (u32)(id >> 32);
@@ -355,20 +391,33 @@ static int minix_readpage(struct file *file, struct page *page)
return block_read_full_page(page,minix_get_block);
}
-int __minix_write_begin(struct file *file, struct address_space *mapping,
- loff_t pos, unsigned len, unsigned flags,
- struct page **pagep, void **fsdata)
+int minix_prepare_chunk(struct page *page, loff_t pos, unsigned len)
{
- return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
- minix_get_block);
+ return __block_write_begin(page, pos, len, minix_get_block);
+}
+
+static void minix_write_failed(struct address_space *mapping, loff_t to)
+{
+ struct inode *inode = mapping->host;
+
+ if (to > inode->i_size) {
+ truncate_pagecache(inode, inode->i_size);
+ minix_truncate(inode);
+ }
}
static int minix_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
{
- *pagep = NULL;
- return __minix_write_begin(file, mapping, pos, len, flags, pagep, fsdata);
+ int ret;
+
+ ret = block_write_begin(mapping, pos, len, flags, pagep,
+ minix_get_block);
+ if (unlikely(ret))
+ minix_write_failed(mapping, pos + len);
+
+ return ret;
}
static sector_t minix_bmap(struct address_space *mapping, sector_t block)
@@ -379,7 +428,6 @@ static sector_t minix_bmap(struct address_space *mapping, sector_t block)
static const struct address_space_operations minix_aops = {
.readpage = minix_readpage,
.writepage = minix_writepage,
- .sync_page = block_sync_page,
.write_begin = minix_write_begin,
.write_end = generic_write_end,
.bmap = minix_bmap
@@ -425,9 +473,9 @@ static struct inode *V1_minix_iget(struct inode *inode)
return ERR_PTR(-EIO);
}
inode->i_mode = raw_inode->i_mode;
- inode->i_uid = (uid_t)raw_inode->i_uid;
- inode->i_gid = (gid_t)raw_inode->i_gid;
- inode->i_nlink = raw_inode->i_nlinks;
+ i_uid_write(inode, raw_inode->i_uid);
+ i_gid_write(inode, raw_inode->i_gid);
+ set_nlink(inode, raw_inode->i_nlinks);
inode->i_size = raw_inode->i_size;
inode->i_mtime.tv_sec = inode->i_atime.tv_sec = inode->i_ctime.tv_sec = raw_inode->i_time;
inode->i_mtime.tv_nsec = 0;
@@ -458,9 +506,9 @@ static struct inode *V2_minix_iget(struct inode *inode)
return ERR_PTR(-EIO);
}
inode->i_mode = raw_inode->i_mode;
- inode->i_uid = (uid_t)raw_inode->i_uid;
- inode->i_gid = (gid_t)raw_inode->i_gid;
- inode->i_nlink = raw_inode->i_nlinks;
+ i_uid_write(inode, raw_inode->i_uid);
+ i_gid_write(inode, raw_inode->i_gid);
+ set_nlink(inode, raw_inode->i_nlinks);
inode->i_size = raw_inode->i_size;
inode->i_mtime.tv_sec = raw_inode->i_mtime;
inode->i_atime.tv_sec = raw_inode->i_atime;
@@ -510,8 +558,8 @@ static struct buffer_head * V1_minix_update_inode(struct inode * inode)
if (!raw_inode)
return NULL;
raw_inode->i_mode = inode->i_mode;
- raw_inode->i_uid = fs_high2lowuid(inode->i_uid);
- raw_inode->i_gid = fs_high2lowgid(inode->i_gid);
+ raw_inode->i_uid = fs_high2lowuid(i_uid_read(inode));
+ raw_inode->i_gid = fs_high2lowgid(i_gid_read(inode));
raw_inode->i_nlinks = inode->i_nlink;
raw_inode->i_size = inode->i_size;
raw_inode->i_time = inode->i_mtime.tv_sec;
@@ -537,8 +585,8 @@ static struct buffer_head * V2_minix_update_inode(struct inode * inode)
if (!raw_inode)
return NULL;
raw_inode->i_mode = inode->i_mode;
- raw_inode->i_uid = fs_high2lowuid(inode->i_uid);
- raw_inode->i_gid = fs_high2lowgid(inode->i_gid);
+ raw_inode->i_uid = fs_high2lowuid(i_uid_read(inode));
+ raw_inode->i_gid = fs_high2lowgid(i_gid_read(inode));
raw_inode->i_nlinks = inode->i_nlink;
raw_inode->i_size = inode->i_size;
raw_inode->i_mtime = inode->i_mtime.tv_sec;
@@ -552,7 +600,7 @@ static struct buffer_head * V2_minix_update_inode(struct inode * inode)
return bh;
}
-static int minix_write_inode(struct inode *inode, int wait)
+static int minix_write_inode(struct inode *inode, struct writeback_control *wbc)
{
int err = 0;
struct buffer_head *bh;
@@ -563,7 +611,7 @@ static int minix_write_inode(struct inode *inode, int wait)
bh = V2_minix_update_inode(inode);
if (!bh)
return -EIO;
- if (wait && buffer_dirty(bh)) {
+ if (wbc->sync_mode == WB_SYNC_ALL && buffer_dirty(bh)) {
sync_dirty_buffer(bh);
if (buffer_req(bh) && !buffer_uptodate(bh)) {
printk("IO error syncing minix inode [%s:%08lx]\n",
@@ -577,8 +625,7 @@ static int minix_write_inode(struct inode *inode, int wait)
int minix_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
{
- struct inode *dir = dentry->d_parent->d_inode;
- struct super_block *sb = dir->i_sb;
+ struct super_block *sb = dentry->d_sb;
generic_fillattr(dentry->d_inode, stat);
if (INODE_VERSION(dentry->d_inode) == MINIX_V1)
stat->blocks = (BLOCK_SIZE / 512) * V1_minix_blocks(stat->size, sb);
@@ -601,20 +648,20 @@ void minix_truncate(struct inode * inode)
V2_minix_truncate(inode);
}
-static int minix_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data, struct vfsmount *mnt)
+static struct dentry *minix_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, minix_fill_super,
- mnt);
+ return mount_bdev(fs_type, flags, dev_name, data, minix_fill_super);
}
static struct file_system_type minix_fs_type = {
.owner = THIS_MODULE,
.name = "minix",
- .get_sb = minix_get_sb,
+ .mount = minix_mount,
.kill_sb = kill_block_super,
.fs_flags = FS_REQUIRES_DEV,
};
+MODULE_ALIAS_FS("minix");
static int __init init_minix_fs(void)
{
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 19:23:45 +0000