[PATCH] fix reservation discarding in affs
- remove affs_put_inode, so preallocations aren't discared unnecessarily often. - remove affs_drop_inode, it's called with a spinlock held, so it can't use a mutex. - make i_opencnt atomic - avoid direct b_count manipulations - a few allocation failure fixes, so that these are more gracefully handled now. Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
parent
a15306365a
commit
dca3c33652
|
@ -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,
|
||||
|
|
|
@ -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;
|
||||
|
|
|
@ -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;
|
||||
|
|
|
@ -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);
|
||||
|
|
|
@ -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,
|
||||
|
|
Loading…
Reference in a new issue