Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6:
  [PATCH] fix SMP ordering hole in fcntl_setlk()
  [PATCH] kill ->put_inode
  [PATCH] fix reservation discarding in affs
This commit is contained in:
Linus Torvalds 2008-05-06 11:39:57 -07:00
commit bb78be8397
10 changed files with 56 additions and 62 deletions

View File

@ -92,7 +92,6 @@ prototypes:
void (*destroy_inode)(struct inode *);
void (*dirty_inode) (struct inode *);
int (*write_inode) (struct inode *, int);
void (*put_inode) (struct inode *);
void (*drop_inode) (struct inode *);
void (*delete_inode) (struct inode *);
void (*put_super) (struct super_block *);
@ -115,7 +114,6 @@ alloc_inode: no no no
destroy_inode: no
dirty_inode: no (must not sleep)
write_inode: no
put_inode: no
drop_inode: no !!!inode_lock!!!
delete_inode: no
put_super: yes yes no

View File

@ -205,7 +205,6 @@ struct super_operations {
void (*dirty_inode) (struct inode *);
int (*write_inode) (struct inode *, int);
void (*put_inode) (struct inode *);
void (*drop_inode) (struct inode *);
void (*delete_inode) (struct inode *);
void (*put_super) (struct super_block *);
@ -246,9 +245,6 @@ or bottom half).
inode to disc. The second parameter indicates whether the write
should be synchronous or not, not all filesystems check this flag.
put_inode: called when the VFS inode is removed from the inode
cache.
drop_inode: called when the last access to the inode is dropped,
with the inode_lock spinlock held.

View File

@ -48,7 +48,7 @@ struct affs_ext_key {
* affs fs inode data in memory
*/
struct affs_inode_info {
u32 i_opencnt;
atomic_t i_opencnt;
struct semaphore i_link_lock; /* Protects internal inode access. */
struct semaphore i_ext_lock; /* Protects internal inode access. */
#define i_hash_lock i_ext_lock
@ -170,8 +170,6 @@ extern int affs_rename(struct inode *old_dir, struct dentry *old_dentry,
extern unsigned long affs_parent_ino(struct inode *dir);
extern struct inode *affs_new_inode(struct inode *dir);
extern int affs_notify_change(struct dentry *dentry, struct iattr *attr);
extern void affs_put_inode(struct inode *inode);
extern void affs_drop_inode(struct inode *inode);
extern void affs_delete_inode(struct inode *inode);
extern void affs_clear_inode(struct inode *inode);
extern struct inode *affs_iget(struct super_block *sb,

View File

@ -48,8 +48,9 @@ affs_file_open(struct inode *inode, struct file *filp)
{
if (atomic_read(&filp->f_count) != 1)
return 0;
pr_debug("AFFS: open(%d)\n", AFFS_I(inode)->i_opencnt);
AFFS_I(inode)->i_opencnt++;
pr_debug("AFFS: open(%lu,%d)\n",
inode->i_ino, atomic_read(&AFFS_I(inode)->i_opencnt));
atomic_inc(&AFFS_I(inode)->i_opencnt);
return 0;
}
@ -58,10 +59,16 @@ affs_file_release(struct inode *inode, struct file *filp)
{
if (atomic_read(&filp->f_count) != 0)
return 0;
pr_debug("AFFS: release(%d)\n", AFFS_I(inode)->i_opencnt);
AFFS_I(inode)->i_opencnt--;
if (!AFFS_I(inode)->i_opencnt)
pr_debug("AFFS: release(%lu, %d)\n",
inode->i_ino, atomic_read(&AFFS_I(inode)->i_opencnt));
if (atomic_dec_and_test(&AFFS_I(inode)->i_opencnt)) {
mutex_lock(&inode->i_mutex);
if (inode->i_size != AFFS_I(inode)->mmu_private)
affs_truncate(inode);
affs_free_prealloc(inode);
mutex_unlock(&inode->i_mutex);
}
return 0;
}
@ -180,7 +187,7 @@ affs_get_extblock(struct inode *inode, u32 ext)
/* inline the simplest case: same extended block as last time */
struct buffer_head *bh = AFFS_I(inode)->i_ext_bh;
if (ext == AFFS_I(inode)->i_ext_last)
atomic_inc(&bh->b_count);
get_bh(bh);
else
/* we have to do more (not inlined) */
bh = affs_get_extblock_slow(inode, ext);
@ -306,7 +313,7 @@ store_ext:
affs_brelse(AFFS_I(inode)->i_ext_bh);
AFFS_I(inode)->i_ext_last = ext;
AFFS_I(inode)->i_ext_bh = bh;
atomic_inc(&bh->b_count);
get_bh(bh);
return bh;
@ -324,7 +331,6 @@ affs_get_block(struct inode *inode, sector_t block, struct buffer_head *bh_resul
pr_debug("AFFS: get_block(%u, %lu)\n", (u32)inode->i_ino, (unsigned long)block);
BUG_ON(block > (sector_t)0x7fffffffUL);
if (block >= AFFS_I(inode)->i_blkcnt) {
@ -827,6 +833,8 @@ affs_truncate(struct inode *inode)
res = mapping->a_ops->write_begin(NULL, mapping, size, 0, 0, &page, &fsdata);
if (!res)
res = mapping->a_ops->write_end(NULL, mapping, size, 0, 0, page, fsdata);
else
inode->i_size = AFFS_I(inode)->mmu_private;
mark_inode_dirty(inode);
return;
} else if (inode->i_size == AFFS_I(inode)->mmu_private)
@ -862,6 +870,7 @@ affs_truncate(struct inode *inode)
blk++;
} else
AFFS_HEAD(ext_bh)->first_data = 0;
AFFS_HEAD(ext_bh)->block_count = cpu_to_be32(i);
size = AFFS_SB(sb)->s_hashsize;
if (size > blkcnt - blk + i)
size = blkcnt - blk + i;

View File

@ -58,7 +58,7 @@ struct inode *affs_iget(struct super_block *sb, unsigned long ino)
AFFS_I(inode)->i_extcnt = 1;
AFFS_I(inode)->i_ext_last = ~1;
AFFS_I(inode)->i_protect = prot;
AFFS_I(inode)->i_opencnt = 0;
atomic_set(&AFFS_I(inode)->i_opencnt, 0);
AFFS_I(inode)->i_blkcnt = 0;
AFFS_I(inode)->i_lc = NULL;
AFFS_I(inode)->i_lc_size = 0;
@ -108,8 +108,6 @@ struct inode *affs_iget(struct super_block *sb, unsigned long ino)
inode->i_mode |= S_IFDIR;
} else
inode->i_mode = S_IRUGO | S_IXUGO | S_IWUSR | S_IFDIR;
if (tail->link_chain)
inode->i_nlink = 2;
/* Maybe it should be controlled by mount parameter? */
//inode->i_mode |= S_ISVTX;
inode->i_op = &affs_dir_inode_operations;
@ -244,31 +242,12 @@ out:
return error;
}
void
affs_put_inode(struct inode *inode)
{
pr_debug("AFFS: put_inode(ino=%lu, nlink=%u)\n", inode->i_ino, inode->i_nlink);
affs_free_prealloc(inode);
}
void
affs_drop_inode(struct inode *inode)
{
mutex_lock(&inode->i_mutex);
if (inode->i_size != AFFS_I(inode)->mmu_private)
affs_truncate(inode);
mutex_unlock(&inode->i_mutex);
generic_drop_inode(inode);
}
void
affs_delete_inode(struct inode *inode)
{
pr_debug("AFFS: delete_inode(ino=%lu, nlink=%u)\n", inode->i_ino, inode->i_nlink);
truncate_inode_pages(&inode->i_data, 0);
inode->i_size = 0;
if (S_ISREG(inode->i_mode))
affs_truncate(inode);
clear_inode(inode);
affs_free_block(inode->i_sb, inode->i_ino);
@ -277,9 +256,12 @@ affs_delete_inode(struct inode *inode)
void
affs_clear_inode(struct inode *inode)
{
unsigned long cache_page = (unsigned long) AFFS_I(inode)->i_lc;
unsigned long cache_page;
pr_debug("AFFS: clear_inode(ino=%lu, nlink=%u)\n", inode->i_ino, inode->i_nlink);
affs_free_prealloc(inode);
cache_page = (unsigned long)AFFS_I(inode)->i_lc;
if (cache_page) {
pr_debug("AFFS: freeing ext cache\n");
AFFS_I(inode)->i_lc = NULL;
@ -316,7 +298,7 @@ affs_new_inode(struct inode *dir)
inode->i_ino = block;
inode->i_nlink = 1;
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
AFFS_I(inode)->i_opencnt = 0;
atomic_set(&AFFS_I(inode)->i_opencnt, 0);
AFFS_I(inode)->i_blkcnt = 0;
AFFS_I(inode)->i_lc = NULL;
AFFS_I(inode)->i_lc_size = 0;
@ -369,12 +351,12 @@ affs_add_entry(struct inode *dir, struct inode *inode, struct dentry *dentry, s3
switch (type) {
case ST_LINKFILE:
case ST_LINKDIR:
inode_bh = bh;
retval = -ENOSPC;
block = affs_alloc_block(dir, dir->i_ino);
if (!block)
goto err;
retval = -EIO;
inode_bh = bh;
bh = affs_getzeroblk(sb, block);
if (!bh)
goto err;

View File

@ -234,7 +234,8 @@ affs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
int
affs_unlink(struct inode *dir, struct dentry *dentry)
{
pr_debug("AFFS: unlink(dir=%d, \"%.*s\")\n", (u32)dir->i_ino,
pr_debug("AFFS: unlink(dir=%d, %lu \"%.*s\")\n", (u32)dir->i_ino,
dentry->d_inode->i_ino,
(int)dentry->d_name.len, dentry->d_name.name);
return affs_remove_header(dentry);
@ -302,7 +303,8 @@ affs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
int
affs_rmdir(struct inode *dir, struct dentry *dentry)
{
pr_debug("AFFS: rmdir(dir=%u, \"%.*s\")\n", (u32)dir->i_ino,
pr_debug("AFFS: rmdir(dir=%u, %lu \"%.*s\")\n", (u32)dir->i_ino,
dentry->d_inode->i_ino,
(int)dentry->d_name.len, dentry->d_name.name);
return affs_remove_header(dentry);

View File

@ -71,12 +71,18 @@ static struct kmem_cache * affs_inode_cachep;
static struct inode *affs_alloc_inode(struct super_block *sb)
{
struct affs_inode_info *ei;
ei = (struct affs_inode_info *)kmem_cache_alloc(affs_inode_cachep, GFP_KERNEL);
if (!ei)
struct affs_inode_info *i;
i = kmem_cache_alloc(affs_inode_cachep, GFP_KERNEL);
if (!i)
return NULL;
ei->vfs_inode.i_version = 1;
return &ei->vfs_inode;
i->vfs_inode.i_version = 1;
i->i_lc = NULL;
i->i_ext_bh = NULL;
i->i_pa_cnt = 0;
return &i->vfs_inode;
}
static void affs_destroy_inode(struct inode *inode)
@ -114,8 +120,6 @@ static const struct super_operations affs_sops = {
.alloc_inode = affs_alloc_inode,
.destroy_inode = affs_destroy_inode,
.write_inode = affs_write_inode,
.put_inode = affs_put_inode,
.drop_inode = affs_drop_inode,
.delete_inode = affs_delete_inode,
.clear_inode = affs_clear_inode,
.put_super = affs_put_super,

View File

@ -1153,9 +1153,6 @@ void iput(struct inode *inode)
BUG_ON(inode->i_state == I_CLEAR);
if (op && op->put_inode)
op->put_inode(inode);
if (atomic_dec_and_lock(&inode->i_count, &inode_lock))
iput_final(inode);
}

View File

@ -1753,6 +1753,7 @@ int fcntl_setlk(unsigned int fd, struct file *filp, unsigned int cmd,
struct file_lock *file_lock = locks_alloc_lock();
struct flock flock;
struct inode *inode;
struct file *f;
int error;
if (file_lock == NULL)
@ -1825,7 +1826,15 @@ again:
* Attempt to detect a close/fcntl race and recover by
* releasing the lock that was just acquired.
*/
if (!error && fcheck(fd) != filp && flock.l_type != F_UNLCK) {
/*
* we need that spin_lock here - it prevents reordering between
* update of inode->i_flock and check for it done in close().
* rcu_read_lock() wouldn't do.
*/
spin_lock(&current->files->file_lock);
f = fcheck(fd);
spin_unlock(&current->files->file_lock);
if (!error && f != filp && flock.l_type != F_UNLCK) {
flock.l_type = F_UNLCK;
goto again;
}
@ -1881,6 +1890,7 @@ int fcntl_setlk64(unsigned int fd, struct file *filp, unsigned int cmd,
struct file_lock *file_lock = locks_alloc_lock();
struct flock64 flock;
struct inode *inode;
struct file *f;
int error;
if (file_lock == NULL)
@ -1953,7 +1963,10 @@ again:
* Attempt to detect a close/fcntl race and recover by
* releasing the lock that was just acquired.
*/
if (!error && fcheck(fd) != filp && flock.l_type != F_UNLCK) {
spin_lock(&current->files->file_lock);
f = fcheck(fd);
spin_unlock(&current->files->file_lock);
if (!error && f != filp && flock.l_type != F_UNLCK) {
flock.l_type = F_UNLCK;
goto again;
}

View File

@ -1289,17 +1289,12 @@ extern ssize_t vfs_readv(struct file *, const struct iovec __user *,
extern ssize_t vfs_writev(struct file *, const struct iovec __user *,
unsigned long, loff_t *);
/*
* NOTE: write_inode, delete_inode, clear_inode, put_inode can be called
* without the big kernel lock held in all filesystems.
*/
struct super_operations {
struct inode *(*alloc_inode)(struct super_block *sb);
void (*destroy_inode)(struct inode *);
void (*dirty_inode) (struct inode *);
int (*write_inode) (struct inode *, int);
void (*put_inode) (struct inode *);
void (*drop_inode) (struct inode *);
void (*delete_inode) (struct inode *);
void (*put_super) (struct super_block *);