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Diffstat (limited to 'fs/qnx4/inode.c')
-rw-r--r--fs/qnx4/inode.c160
1 files changed, 47 insertions, 113 deletions
diff --git a/fs/qnx4/inode.c b/fs/qnx4/inode.c
index 6b009548d2e..c4bcb778886 100644
--- a/fs/qnx4/inode.c
+++ b/fs/qnx4/inode.c
@@ -27,7 +27,6 @@
static const struct super_operations qnx4_sops;
-static void qnx4_put_super(struct super_block *sb);
static struct inode *qnx4_alloc_inode(struct super_block *sb);
static void qnx4_destroy_inode(struct inode *inode);
static int qnx4_remount(struct super_block *sb, int *flags, char *data);
@@ -37,7 +36,6 @@ static const struct super_operations qnx4_sops =
{
.alloc_inode = qnx4_alloc_inode,
.destroy_inode = qnx4_destroy_inode,
- .put_super = qnx4_put_super,
.statfs = qnx4_statfs,
.remount_fs = qnx4_remount,
};
@@ -46,44 +44,13 @@ static int qnx4_remount(struct super_block *sb, int *flags, char *data)
{
struct qnx4_sb_info *qs;
+ sync_filesystem(sb);
qs = qnx4_sb(sb);
qs->Version = QNX4_VERSION;
*flags |= MS_RDONLY;
return 0;
}
-static struct buffer_head *qnx4_getblk(struct inode *inode, int nr,
- int create)
-{
- struct buffer_head *result = NULL;
-
- if ( nr >= 0 )
- nr = qnx4_block_map( inode, nr );
- if (nr) {
- result = sb_getblk(inode->i_sb, nr);
- return result;
- }
- return NULL;
-}
-
-struct buffer_head *qnx4_bread(struct inode *inode, int block, int create)
-{
- struct buffer_head *bh;
-
- bh = qnx4_getblk(inode, block, create);
- if (!bh || buffer_uptodate(bh)) {
- return bh;
- }
- ll_rw_block(READ, 1, &bh);
- wait_on_buffer(bh);
- if (buffer_uptodate(bh)) {
- return bh;
- }
- brelse(bh);
-
- return NULL;
-}
-
static int qnx4_get_block( struct inode *inode, sector_t iblock, struct buffer_head *bh, int create )
{
unsigned long phys;
@@ -98,23 +65,31 @@ static int qnx4_get_block( struct inode *inode, sector_t iblock, struct buffer_h
return 0;
}
+static inline u32 try_extent(qnx4_xtnt_t *extent, u32 *offset)
+{
+ u32 size = le32_to_cpu(extent->xtnt_size);
+ if (*offset < size)
+ return le32_to_cpu(extent->xtnt_blk) + *offset - 1;
+ *offset -= size;
+ return 0;
+}
+
unsigned long qnx4_block_map( struct inode *inode, long iblock )
{
int ix;
- long offset, i_xblk;
- unsigned long block = 0;
+ long i_xblk;
struct buffer_head *bh = NULL;
struct qnx4_xblk *xblk = NULL;
struct qnx4_inode_entry *qnx4_inode = qnx4_raw_inode(inode);
u16 nxtnt = le16_to_cpu(qnx4_inode->di_num_xtnts);
+ u32 offset = iblock;
+ u32 block = try_extent(&qnx4_inode->di_first_xtnt, &offset);
- if ( iblock < le32_to_cpu(qnx4_inode->di_first_xtnt.xtnt_size) ) {
+ if (block) {
// iblock is in the first extent. This is easy.
- block = le32_to_cpu(qnx4_inode->di_first_xtnt.xtnt_blk) + iblock - 1;
} else {
// iblock is beyond first extent. We have to follow the extent chain.
i_xblk = le32_to_cpu(qnx4_inode->di_xblk);
- offset = iblock - le32_to_cpu(qnx4_inode->di_first_xtnt.xtnt_size);
ix = 0;
while ( --nxtnt > 0 ) {
if ( ix == 0 ) {
@@ -130,12 +105,11 @@ unsigned long qnx4_block_map( struct inode *inode, long iblock )
return -EIO;
}
}
- if ( offset < le32_to_cpu(xblk->xblk_xtnts[ix].xtnt_size) ) {
+ block = try_extent(&xblk->xblk_xtnts[ix], &offset);
+ if (block) {
// got it!
- block = le32_to_cpu(xblk->xblk_xtnts[ix].xtnt_blk) + offset - 1;
break;
}
- offset -= le32_to_cpu(xblk->xblk_xtnts[ix].xtnt_size);
if ( ++ix >= xblk->xblk_num_xtnts ) {
i_xblk = le32_to_cpu(xblk->xblk_next_xblk);
ix = 0;
@@ -173,18 +147,19 @@ static int qnx4_statfs(struct dentry *dentry, struct kstatfs *buf)
* it really _is_ a qnx4 filesystem, and to check the size
* of the directory entry.
*/
-static const char *qnx4_checkroot(struct super_block *sb)
+static const char *qnx4_checkroot(struct super_block *sb,
+ struct qnx4_super_block *s)
{
struct buffer_head *bh;
struct qnx4_inode_entry *rootdir;
int rd, rl;
int i, j;
- if (*(qnx4_sb(sb)->sb->RootDir.di_fname) != '/')
+ if (s->RootDir.di_fname[0] != '/' || s->RootDir.di_fname[1] != '\0')
return "no qnx4 filesystem (no root dir).";
QNX4DEBUG((KERN_NOTICE "QNX4 filesystem found on dev %s.\n", sb->s_id));
- rd = le32_to_cpu(qnx4_sb(sb)->sb->RootDir.di_first_xtnt.xtnt_blk) - 1;
- rl = le32_to_cpu(qnx4_sb(sb)->sb->RootDir.di_first_xtnt.xtnt_size);
+ rd = le32_to_cpu(s->RootDir.di_first_xtnt.xtnt_blk) - 1;
+ rl = le32_to_cpu(s->RootDir.di_first_xtnt.xtnt_size);
for (j = 0; j < rl; j++) {
bh = sb_bread(sb, rd + j); /* root dir, first block */
if (bh == NULL)
@@ -214,7 +189,6 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent)
struct inode *root;
const char *errmsg;
struct qnx4_sb_info *qs;
- int ret = -EINVAL;
qs = kzalloc(sizeof(struct qnx4_sb_info), GFP_KERNEL);
if (!qs)
@@ -223,74 +197,50 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent)
sb_set_blocksize(s, QNX4_BLOCK_SIZE);
+ s->s_op = &qnx4_sops;
+ s->s_magic = QNX4_SUPER_MAGIC;
+ s->s_flags |= MS_RDONLY; /* Yup, read-only yet */
+
/* Check the superblock signature. Since the qnx4 code is
dangerous, we should leave as quickly as possible
if we don't belong here... */
bh = sb_bread(s, 1);
if (!bh) {
printk(KERN_ERR "qnx4: unable to read the superblock\n");
- goto outnobh;
- }
- if ( le32_to_cpup((__le32*) bh->b_data) != QNX4_SUPER_MAGIC ) {
- if (!silent)
- printk(KERN_ERR "qnx4: wrong fsid in superblock.\n");
- goto out;
+ return -EINVAL;
}
- s->s_op = &qnx4_sops;
- s->s_magic = QNX4_SUPER_MAGIC;
- s->s_flags |= MS_RDONLY; /* Yup, read-only yet */
- qnx4_sb(s)->sb_buf = bh;
- qnx4_sb(s)->sb = (struct qnx4_super_block *) bh->b_data;
-
/* check before allocating dentries, inodes, .. */
- errmsg = qnx4_checkroot(s);
+ errmsg = qnx4_checkroot(s, (struct qnx4_super_block *) bh->b_data);
+ brelse(bh);
if (errmsg != NULL) {
if (!silent)
printk(KERN_ERR "qnx4: %s\n", errmsg);
- goto out;
+ return -EINVAL;
}
/* does root not have inode number QNX4_ROOT_INO ?? */
root = qnx4_iget(s, QNX4_ROOT_INO * QNX4_INODES_PER_BLOCK);
if (IS_ERR(root)) {
printk(KERN_ERR "qnx4: get inode failed\n");
- ret = PTR_ERR(root);
- goto outb;
+ return PTR_ERR(root);
}
- ret = -ENOMEM;
- s->s_root = d_alloc_root(root);
+ s->s_root = d_make_root(root);
if (s->s_root == NULL)
- goto outi;
+ return -ENOMEM;
- brelse(bh);
return 0;
-
- outi:
- iput(root);
- outb:
- kfree(qs->BitMap);
- out:
- brelse(bh);
- outnobh:
- kfree(qs);
- s->s_fs_info = NULL;
- return ret;
}
-static void qnx4_put_super(struct super_block *sb)
+static void qnx4_kill_sb(struct super_block *sb)
{
struct qnx4_sb_info *qs = qnx4_sb(sb);
- kfree( qs->BitMap );
- kfree( qs );
- sb->s_fs_info = NULL;
- return;
-}
-
-static int qnx4_writepage(struct page *page, struct writeback_control *wbc)
-{
- return block_write_full_page(page,qnx4_get_block, wbc);
+ kill_block_super(sb);
+ if (qs) {
+ kfree(qs->BitMap);
+ kfree(qs);
+ }
}
static int qnx4_readpage(struct file *file, struct page *page)
@@ -298,34 +248,12 @@ static int qnx4_readpage(struct file *file, struct page *page)
return block_read_full_page(page,qnx4_get_block);
}
-static int qnx4_write_begin(struct file *file, struct address_space *mapping,
- loff_t pos, unsigned len, unsigned flags,
- struct page **pagep, void **fsdata)
-{
- struct qnx4_inode_info *qnx4_inode = qnx4_i(mapping->host);
- int ret;
-
- *pagep = NULL;
- ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
- qnx4_get_block,
- &qnx4_inode->mmu_private);
- if (unlikely(ret)) {
- loff_t isize = mapping->host->i_size;
- if (pos + len > isize)
- vmtruncate(mapping->host, isize);
- }
-
- return ret;
-}
static sector_t qnx4_bmap(struct address_space *mapping, sector_t block)
{
return generic_block_bmap(mapping,block,qnx4_get_block);
}
static const struct address_space_operations qnx4_aops = {
.readpage = qnx4_readpage,
- .writepage = qnx4_writepage,
- .write_begin = qnx4_write_begin,
- .write_end = generic_write_end,
.bmap = qnx4_bmap
};
@@ -366,8 +294,8 @@ struct inode *qnx4_iget(struct super_block *sb, unsigned long ino)
(ino % QNX4_INODES_PER_BLOCK);
inode->i_mode = le16_to_cpu(raw_inode->di_mode);
- inode->i_uid = (uid_t)le16_to_cpu(raw_inode->di_uid);
- inode->i_gid = (gid_t)le16_to_cpu(raw_inode->di_gid);
+ i_uid_write(inode, (uid_t)le16_to_cpu(raw_inode->di_uid));
+ i_gid_write(inode, (gid_t)le16_to_cpu(raw_inode->di_gid));
set_nlink(inode, le16_to_cpu(raw_inode->di_nlink));
inode->i_size = le32_to_cpu(raw_inode->di_size);
inode->i_mtime.tv_sec = le32_to_cpu(raw_inode->di_mtime);
@@ -445,6 +373,11 @@ 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(qnx4_inode_cachep);
}
@@ -458,9 +391,10 @@ static struct file_system_type qnx4_fs_type = {
.owner = THIS_MODULE,
.name = "qnx4",
.mount = qnx4_mount,
- .kill_sb = kill_block_super,
+ .kill_sb = qnx4_kill_sb,
.fs_flags = FS_REQUIRES_DEV,
};
+MODULE_ALIAS_FS("qnx4");
static int __init init_qnx4_fs(void)
{
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 12:05:14 +0000