*
* Copyright (C) 1991, 1992 Linus Torvalds
*
- * Copyright (C) 1996 Gertjan van Wingerde (gertjan@cs.vu.nl)
+ * Copyright (C) 1996 Gertjan van Wingerde
* Minix V2 fs support.
*
* Modified for 680x0 by Andreas Schwab
+ * Updated to filesystem version 3 by Daniel Aragones
*/
#include <linux/module.h>
#include <linux/highuid.h>
#include <linux/vfs.h>
-static void minix_read_inode(struct inode * inode);
static int minix_write_inode(struct inode * inode, int wait);
static int minix_statfs(struct dentry *dentry, struct kstatfs *buf);
static int minix_remount (struct super_block * sb, int * flags, char * data);
struct minix_sb_info *sbi = minix_sb(sb);
if (!(sb->s_flags & MS_RDONLY)) {
- sbi->s_ms->s_state = sbi->s_mount_state;
+ if (sbi->s_version != MINIX_V3) /* s_state is now out from V3 sb */
+ sbi->s_ms->s_state = sbi->s_mount_state;
mark_buffer_dirty(sbi->s_sbh);
}
for (i = 0; i < sbi->s_imap_blocks; i++)
kfree(sbi->s_imap);
sb->s_fs_info = NULL;
kfree(sbi);
-
- return;
}
-static kmem_cache_t * minix_inode_cachep;
+static struct kmem_cache * minix_inode_cachep;
static struct inode *minix_alloc_inode(struct super_block *sb)
{
struct minix_inode_info *ei;
- ei = (struct minix_inode_info *)kmem_cache_alloc(minix_inode_cachep, SLAB_KERNEL);
+ ei = (struct minix_inode_info *)kmem_cache_alloc(minix_inode_cachep, GFP_KERNEL);
if (!ei)
return NULL;
return &ei->vfs_inode;
kmem_cache_free(minix_inode_cachep, minix_i(inode));
}
-static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
+static void init_once(void *foo)
{
struct minix_inode_info *ei = (struct minix_inode_info *) foo;
- if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
- SLAB_CTOR_CONSTRUCTOR)
- inode_init_once(&ei->vfs_inode);
+ inode_init_once(&ei->vfs_inode);
}
-
+
static int init_inodecache(void)
{
minix_inode_cachep = kmem_cache_create("minix_inode_cache",
sizeof(struct minix_inode_info),
0, (SLAB_RECLAIM_ACCOUNT|
SLAB_MEM_SPREAD),
- init_once, NULL);
+ init_once);
if (minix_inode_cachep == NULL)
return -ENOMEM;
return 0;
kmem_cache_destroy(minix_inode_cachep);
}
-static struct super_operations minix_sops = {
+static const struct super_operations minix_sops = {
.alloc_inode = minix_alloc_inode,
.destroy_inode = minix_destroy_inode,
- .read_inode = minix_read_inode,
.write_inode = minix_write_inode,
.delete_inode = minix_delete_inode,
.put_super = minix_put_super,
!(sbi->s_mount_state & MINIX_VALID_FS))
return 0;
/* Mounting a rw partition read-only. */
- ms->s_state = sbi->s_mount_state;
+ if (sbi->s_version != MINIX_V3)
+ ms->s_state = sbi->s_mount_state;
mark_buffer_dirty(sbi->s_sbh);
} else {
/* Mount a partition which is read-only, read-write. */
- sbi->s_mount_state = ms->s_state;
- ms->s_state &= ~MINIX_VALID_FS;
+ if (sbi->s_version != MINIX_V3) {
+ sbi->s_mount_state = ms->s_state;
+ ms->s_state &= ~MINIX_VALID_FS;
+ } else {
+ sbi->s_mount_state = MINIX_VALID_FS;
+ }
mark_buffer_dirty(sbi->s_sbh);
if (!(sbi->s_mount_state & MINIX_VALID_FS))
struct buffer_head *bh;
struct buffer_head **map;
struct minix_super_block *ms;
- int i, block;
+ struct minix3_super_block *m3s = NULL;
+ unsigned long i, block;
struct inode *root_inode;
struct minix_sb_info *sbi;
+ int ret = -EINVAL;
sbi = kzalloc(sizeof(struct minix_sb_info), GFP_KERNEL);
if (!sbi)
return -ENOMEM;
s->s_fs_info = sbi;
- /* N.B. These should be compile-time tests.
- Unfortunately that is impossible. */
- if (32 != sizeof (struct minix_inode))
- panic("bad V1 i-node size");
- if (64 != sizeof(struct minix2_inode))
- panic("bad V2 i-node size");
+ BUILD_BUG_ON(32 != sizeof (struct minix_inode));
+ BUILD_BUG_ON(64 != sizeof(struct minix2_inode));
if (!sb_set_blocksize(s, BLOCK_SIZE))
goto out_bad_hblock;
sbi->s_dirsize = 32;
sbi->s_namelen = 30;
sbi->s_link_max = 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;
+ sbi->s_imap_blocks = m3s->s_imap_blocks;
+ sbi->s_zmap_blocks = m3s->s_zmap_blocks;
+ sbi->s_firstdatazone = m3s->s_firstdatazone;
+ sbi->s_log_zone_size = m3s->s_log_zone_size;
+ sbi->s_max_size = m3s->s_max_size;
+ sbi->s_ninodes = m3s->s_ninodes;
+ sbi->s_nzones = m3s->s_zones;
+ 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);
} else
goto out_no_fs;
/* set up enough so that it can read an inode */
s->s_op = &minix_sops;
- root_inode = iget(s, MINIX_ROOT_INO);
- if (!root_inode || is_bad_inode(root_inode))
+ root_inode = minix_iget(s, MINIX_ROOT_INO);
+ if (IS_ERR(root_inode)) {
+ ret = PTR_ERR(root_inode);
goto out_no_root;
+ }
+ ret = -ENOMEM;
s->s_root = d_alloc_root(root_inode);
if (!s->s_root)
goto out_iput;
- if (!NO_TRUNCATE)
- s->s_root->d_op = &minix_dentry_operations;
-
if (!(s->s_flags & MS_RDONLY)) {
- ms->s_state &= ~MINIX_VALID_FS;
+ if (sbi->s_version != MINIX_V3) /* s_state is now out from V3 sb */
+ ms->s_state &= ~MINIX_VALID_FS;
mark_buffer_dirty(bh);
}
if (!(sbi->s_mount_state & MINIX_VALID_FS))
goto out_release;
out_no_map:
+ ret = -ENOMEM;
if (!silent)
printk("MINIX-fs: can't allocate map\n");
goto out_release;
out_no_fs:
if (!silent)
- printk("VFS: Can't find a Minix or Minix V2 filesystem "
- "on device %s\n", s->s_id);
+ printk("VFS: Can't find a Minix filesystem V1 | V2 | V3 "
+ "on device %s.\n", s->s_id);
out_release:
brelse(bh);
goto out;
out:
s->s_fs_info = NULL;
kfree(sbi);
- return -EINVAL;
+ return ret;
}
static int minix_statfs(struct dentry *dentry, struct kstatfs *buf)
{
- struct minix_sb_info *sbi = minix_sb(dentry->d_sb);
- buf->f_type = dentry->d_sb->s_magic;
- buf->f_bsize = dentry->d_sb->s_blocksize;
+ struct super_block *sb = dentry->d_sb;
+ struct minix_sb_info *sbi = minix_sb(sb);
+ u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
+ 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_bavail = buf->f_bfree;
buf->f_files = sbi->s_ninodes;
buf->f_ffree = minix_count_free_inodes(sbi);
buf->f_namelen = sbi->s_namelen;
+ buf->f_fsid.val[0] = (u32)id;
+ buf->f_fsid.val[1] = (u32)(id >> 32);
+
return 0;
}
{
return block_write_full_page(page, minix_get_block, wbc);
}
+
static int minix_readpage(struct file *file, struct page *page)
{
return block_read_full_page(page,minix_get_block);
}
-static int minix_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to)
+
+int __minix_write_begin(struct file *file, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned flags,
+ struct page **pagep, void **fsdata)
{
- return block_prepare_write(page,from,to,minix_get_block);
+ return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
+ minix_get_block);
}
+
+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);
+}
+
static sector_t minix_bmap(struct address_space *mapping, sector_t block)
{
return generic_block_bmap(mapping,block,minix_get_block);
}
+
static const struct address_space_operations minix_aops = {
.readpage = minix_readpage,
.writepage = minix_writepage,
.sync_page = block_sync_page,
- .prepare_write = minix_prepare_write,
- .commit_write = generic_commit_write,
+ .write_begin = minix_write_begin,
+ .write_end = generic_write_end,
.bmap = minix_bmap
};
-static struct inode_operations minix_symlink_inode_operations = {
+static const struct inode_operations minix_symlink_inode_operations = {
.readlink = generic_readlink,
.follow_link = page_follow_link_light,
.put_link = page_put_link,
/*
* The minix V1 function to read an inode.
*/
-static void V1_minix_read_inode(struct inode * inode)
+static struct inode *V1_minix_iget(struct inode *inode)
{
struct buffer_head * bh;
struct minix_inode * raw_inode;
raw_inode = minix_V1_raw_inode(inode->i_sb, inode->i_ino, &bh);
if (!raw_inode) {
- make_bad_inode(inode);
- return;
+ iget_failed(inode);
+ return ERR_PTR(-EIO);
}
inode->i_mode = raw_inode->i_mode;
inode->i_uid = (uid_t)raw_inode->i_uid;
minix_inode->u.i1_data[i] = raw_inode->i_zone[i];
minix_set_inode(inode, old_decode_dev(raw_inode->i_zone[0]));
brelse(bh);
+ unlock_new_inode(inode);
+ return inode;
}
/*
* The minix V2 function to read an inode.
*/
-static void V2_minix_read_inode(struct inode * inode)
+static struct inode *V2_minix_iget(struct inode *inode)
{
struct buffer_head * bh;
struct minix2_inode * raw_inode;
raw_inode = minix_V2_raw_inode(inode->i_sb, inode->i_ino, &bh);
if (!raw_inode) {
- make_bad_inode(inode);
- return;
+ iget_failed(inode);
+ return ERR_PTR(-EIO);
}
inode->i_mode = raw_inode->i_mode;
inode->i_uid = (uid_t)raw_inode->i_uid;
minix_inode->u.i2_data[i] = raw_inode->i_zone[i];
minix_set_inode(inode, old_decode_dev(raw_inode->i_zone[0]));
brelse(bh);
+ unlock_new_inode(inode);
+ return inode;
}
/*
* The global function to read an inode.
*/
-static void minix_read_inode(struct inode * inode)
+struct inode *minix_iget(struct super_block *sb, unsigned long ino)
{
+ struct inode *inode;
+
+ inode = iget_locked(sb, ino);
+ if (!inode)
+ return ERR_PTR(-ENOMEM);
+ if (!(inode->i_state & I_NEW))
+ return inode;
+
if (INODE_VERSION(inode) == MINIX_V1)
- V1_minix_read_inode(inode);
+ return V1_minix_iget(inode);
else
- V2_minix_read_inode(inode);
+ return V2_minix_iget(inode);
}
/*
return bh;
}
-static struct buffer_head *minix_update_inode(struct inode *inode)
-{
- if (INODE_VERSION(inode) == MINIX_V1)
- return V1_minix_update_inode(inode);
- else
- return V2_minix_update_inode(inode);
-}
-
-static int minix_write_inode(struct inode * inode, int wait)
-{
- brelse(minix_update_inode(inode));
- return 0;
-}
-
-int minix_sync_inode(struct inode * inode)
+static int minix_write_inode(struct inode *inode, int wait)
{
int err = 0;
struct buffer_head *bh;
- bh = minix_update_inode(inode);
- if (bh && buffer_dirty(bh))
- {
+ if (INODE_VERSION(inode) == MINIX_V1)
+ bh = V1_minix_update_inode(inode);
+ else
+ bh = V2_minix_update_inode(inode);
+ if (!bh)
+ return -EIO;
+ if (wait && buffer_dirty(bh)) {
sync_dirty_buffer(bh);
- if (buffer_req(bh) && !buffer_uptodate(bh))
- {
+ if (buffer_req(bh) && !buffer_uptodate(bh)) {
printk("IO error syncing minix inode [%s:%08lx]\n",
inode->i_sb->s_id, inode->i_ino);
- err = -1;
+ err = -EIO;
}
}
- else if (!bh)
- err = -1;
brelse (bh);
return err;
}
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;
generic_fillattr(dentry->d_inode, stat);
if (INODE_VERSION(dentry->d_inode) == MINIX_V1)
- stat->blocks = (BLOCK_SIZE / 512) * V1_minix_blocks(stat->size);
+ stat->blocks = (BLOCK_SIZE / 512) * V1_minix_blocks(stat->size, sb);
else
- stat->blocks = (BLOCK_SIZE / 512) * V2_minix_blocks(stat->size);
- stat->blksize = BLOCK_SIZE;
+ stat->blocks = (sb->s_blocksize / 512) * V2_minix_blocks(stat->size, sb);
+ stat->blksize = sb->s_blocksize;
return 0;
}
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