diff options
118 files changed, 851 insertions, 689 deletions
diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking index 2db4283..8a817f6 100644 --- a/Documentation/filesystems/Locking +++ b/Documentation/filesystems/Locking @@ -349,21 +349,36 @@ call this method upon the IO completion. --------------------------- block_device_operations ----------------------- prototypes: - int (*open) (struct inode *, struct file *); - int (*release) (struct inode *, struct file *); - int (*ioctl) (struct inode *, struct file *, unsigned, unsigned long); + int (*open) (struct block_device *, fmode_t); + int (*release) (struct gendisk *, fmode_t); + int (*ioctl) (struct block_device *, fmode_t, unsigned, unsigned long); + int (*compat_ioctl) (struct block_device *, fmode_t, unsigned, unsigned long); + int (*direct_access) (struct block_device *, sector_t, void **, unsigned long *); int (*media_changed) (struct gendisk *); + void (*unlock_native_capacity) (struct gendisk *); int (*revalidate_disk) (struct gendisk *); + int (*getgeo)(struct block_device *, struct hd_geometry *); + void (*swap_slot_free_notify) (struct block_device *, unsigned long); locking rules: - BKL bd_sem -open: yes yes -release: yes yes -ioctl: yes no + BKL bd_mutex +open: no yes +release: no yes +ioctl: no no +compat_ioctl: no no +direct_access: no no media_changed: no no +unlock_native_capacity: no no revalidate_disk: no no +getgeo: no no +swap_slot_free_notify: no no (see below) + +media_changed, unlock_native_capacity and revalidate_disk are called only from +check_disk_change(). + +swap_slot_free_notify is called with swap_lock and sometimes the page lock +held. -The last two are called only from check_disk_change(). --------------------------- file_operations ------------------------------- prototypes: diff --git a/Documentation/filesystems/sharedsubtree.txt b/Documentation/filesystems/sharedsubtree.txt index fc0e39a..4ede421 100644 --- a/Documentation/filesystems/sharedsubtree.txt +++ b/Documentation/filesystems/sharedsubtree.txt @@ -62,10 +62,10 @@ replicas continue to be exactly same. # mount /dev/sd0 /tmp/a #ls /tmp/a - t1 t2 t2 + t1 t2 t3 #ls /mnt/a - t1 t2 t2 + t1 t2 t3 Note that the mount has propagated to the mount at /mnt as well. diff --git a/drivers/char/mem.c b/drivers/char/mem.c index e985b1c..1256454 100644 --- a/drivers/char/mem.c +++ b/drivers/char/mem.c @@ -876,6 +876,10 @@ static int memory_open(struct inode *inode, struct file *filp) if (dev->dev_info) filp->f_mapping->backing_dev_info = dev->dev_info; + /* Is /dev/mem or /dev/kmem ? */ + if (dev->dev_info == &directly_mappable_cdev_bdi) + filp->f_mode |= FMODE_UNSIGNED_OFFSET; + if (dev->fops->open) return dev->fops->open(inode, filp); diff --git a/drivers/infiniband/hw/ipath/ipath_fs.c b/drivers/infiniband/hw/ipath/ipath_fs.c index d13e726..12d5bf7 100644 --- a/drivers/infiniband/hw/ipath/ipath_fs.c +++ b/drivers/infiniband/hw/ipath/ipath_fs.c @@ -57,6 +57,7 @@ static int ipathfs_mknod(struct inode *dir, struct dentry *dentry, goto bail; } + inode->i_ino = get_next_ino(); inode->i_mode = mode; inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; inode->i_private = data; diff --git a/drivers/infiniband/hw/qib/qib_fs.c b/drivers/infiniband/hw/qib/qib_fs.c index a0e6613..7e433d7 100644 --- a/drivers/infiniband/hw/qib/qib_fs.c +++ b/drivers/infiniband/hw/qib/qib_fs.c @@ -58,6 +58,7 @@ static int qibfs_mknod(struct inode *dir, struct dentry *dentry, goto bail; } + inode->i_ino = get_next_ino(); inode->i_mode = mode; inode->i_uid = 0; inode->i_gid = 0; diff --git a/drivers/misc/ibmasm/ibmasmfs.c b/drivers/misc/ibmasm/ibmasmfs.c index af2497a..0a53500 100644 --- a/drivers/misc/ibmasm/ibmasmfs.c +++ b/drivers/misc/ibmasm/ibmasmfs.c @@ -146,6 +146,7 @@ static struct inode *ibmasmfs_make_inode(struct super_block *sb, int mode) struct inode *ret = new_inode(sb); if (ret) { + ret->i_ino = get_next_ino(); ret->i_mode = mode; ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME; } diff --git a/drivers/oprofile/oprofilefs.c b/drivers/oprofile/oprofilefs.c index 95f711b..449de59 100644 --- a/drivers/oprofile/oprofilefs.c +++ b/drivers/oprofile/oprofilefs.c @@ -28,6 +28,7 @@ static struct inode *oprofilefs_get_inode(struct super_block *sb, int mode) struct inode *inode = new_inode(sb); if (inode) { + inode->i_ino = get_next_ino(); inode->i_mode = mode; inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; } diff --git a/drivers/staging/pohmelfs/inode.c b/drivers/staging/pohmelfs/inode.c index 97dae29..c62d300 100644 --- a/drivers/staging/pohmelfs/inode.c +++ b/drivers/staging/pohmelfs/inode.c @@ -882,12 +882,8 @@ static struct inode *pohmelfs_alloc_inode(struct super_block *sb) static int pohmelfs_fsync(struct file *file, int datasync) { struct inode *inode = file->f_mapping->host; - struct writeback_control wbc = { - .sync_mode = WB_SYNC_ALL, - .nr_to_write = 0, /* sys_fsync did this */ - }; - return sync_inode(inode, &wbc); + return sync_inode_metadata(inode, 1); } ssize_t pohmelfs_write(struct file *file, const char __user *buf, diff --git a/drivers/usb/core/inode.c b/drivers/usb/core/inode.c index 095fa53..e2f63c0 100644 --- a/drivers/usb/core/inode.c +++ b/drivers/usb/core/inode.c @@ -276,6 +276,7 @@ static struct inode *usbfs_get_inode (struct super_block *sb, int mode, dev_t de struct inode *inode = new_inode(sb); if (inode) { + inode->i_ino = get_next_ino(); inode->i_mode = mode; inode->i_uid = current_fsuid(); inode->i_gid = current_fsgid(); diff --git a/drivers/usb/gadget/f_fs.c b/drivers/usb/gadget/f_fs.c index e4f5950..e093fd8 100644 --- a/drivers/usb/gadget/f_fs.c +++ b/drivers/usb/gadget/f_fs.c @@ -980,6 +980,7 @@ ffs_sb_make_inode(struct super_block *sb, void *data, if (likely(inode)) { struct timespec current_time = CURRENT_TIME; + inode->i_ino = usbfs_get_inode(); inode->i_mode = perms->mode; inode->i_uid = perms->uid; inode->i_gid = perms->gid; diff --git a/drivers/usb/gadget/inode.c b/drivers/usb/gadget/inode.c index d1d72d9..ba145e7 100644 --- a/drivers/usb/gadget/inode.c +++ b/drivers/usb/gadget/inode.c @@ -1991,6 +1991,7 @@ gadgetfs_make_inode (struct super_block *sb, struct inode *inode = new_inode (sb); if (inode) { + inode->i_ino = get_next_ino(); inode->i_mode = mode; inode->i_uid = default_uid; inode->i_gid = default_gid; diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c index 9e670d5..ef5905f 100644 --- a/fs/9p/vfs_inode.c +++ b/fs/9p/vfs_inode.c @@ -1789,9 +1789,10 @@ v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir, kfree(st); } else { /* Caching disabled. No need to get upto date stat info. - * This dentry will be released immediately. So, just i_count++ + * This dentry will be released immediately. So, just hold the + * inode */ - atomic_inc(&old_dentry->d_inode->i_count); + ihold(old_dentry->d_inode); } dentry->d_op = old_dentry->d_op; diff --git a/fs/affs/file.c b/fs/affs/file.c index c4a9875..0a90dcd 100644 --- a/fs/affs/file.c +++ b/fs/affs/file.c @@ -894,9 +894,9 @@ affs_truncate(struct inode *inode) if (AFFS_SB(sb)->s_flags & SF_OFS) { struct buffer_head *bh = affs_bread_ino(inode, last_blk, 0); u32 tmp; - if (IS_ERR(ext_bh)) { + if (IS_ERR(bh)) { affs_warning(sb, "truncate", "unexpected read error for last block %u (%d)", - ext, PTR_ERR(ext_bh)); + ext, PTR_ERR(bh)); return; } tmp = be32_to_cpu(AFFS_DATA_HEAD(bh)->next); diff --git a/fs/affs/inode.c b/fs/affs/inode.c index 3a0fdec..5d82890 100644 --- a/fs/affs/inode.c +++ b/fs/affs/inode.c @@ -388,7 +388,7 @@ affs_add_entry(struct inode *dir, struct inode *inode, struct dentry *dentry, s3 affs_adjust_checksum(inode_bh, block - be32_to_cpu(chain)); mark_buffer_dirty_inode(inode_bh, inode); inode->i_nlink = 2; - atomic_inc(&inode->i_count); + ihold(inode); } affs_fix_checksum(sb, bh); mark_buffer_dirty_inode(bh, inode); diff --git a/fs/afs/dir.c b/fs/afs/dir.c index 0d38c09..5439e1b 100644 --- a/fs/afs/dir.c +++ b/fs/afs/dir.c @@ -1045,7 +1045,7 @@ static int afs_link(struct dentry *from, struct inode *dir, if (ret < 0) goto link_error; - atomic_inc(&vnode->vfs_inode.i_count); + ihold(&vnode->vfs_inode); d_instantiate(dentry, &vnode->vfs_inode); key_put(key); _leave(" = 0"); @@ -1543,7 +1543,19 @@ static void aio_batch_add(struct address_space *mapping, } abe = mempool_alloc(abe_pool, GFP_KERNEL); - BUG_ON(!igrab(mapping->host)); + + /* + * we should be using igrab here, but + * we don't want to hammer on the global + * inode spinlock just to take an extra + * reference on a file that we must already + * have a reference to. + * + * When we're called, we always have a reference + * on the file, so we must always have a reference + * on the inode, so ihold() is safe here. + */ + ihold(mapping->host); abe->mapping = mapping; hlist_add_head(&abe->list, &batch_hash[bucket]); return; diff --git a/fs/anon_inodes.c b/fs/anon_inodes.c index e4b75d6..5365527 100644 --- a/fs/anon_inodes.c +++ b/fs/anon_inodes.c @@ -111,10 +111,9 @@ struct file *anon_inode_getfile(const char *name, path.mnt = mntget(anon_inode_mnt); /* * We know the anon_inode inode count is always greater than zero, - * so we can avoid doing an igrab() and we can use an open-coded - * atomic_inc(). + * so ihold() is safe. */ - atomic_inc(&anon_inode_inode->i_count); + ihold(anon_inode_inode); path.dentry->d_op = &anon_inodefs_dentry_operations; d_instantiate(path.dentry, anon_inode_inode); @@ -194,6 +193,7 @@ static struct inode *anon_inode_mkinode(void) if (!inode) return ERR_PTR(-ENOMEM); + inode->i_ino = get_next_ino(); inode->i_fop = &anon_inode_fops; inode->i_mapping->a_ops = &anon_aops; diff --git a/fs/autofs4/inode.c b/fs/autofs4/inode.c index 821b2b9..ac87e49 100644 --- a/fs/autofs4/inode.c +++ b/fs/autofs4/inode.c @@ -398,6 +398,7 @@ struct inode *autofs4_get_inode(struct super_block *sb, inode->i_gid = sb->s_root->d_inode->i_gid; } inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; + inode->i_ino = get_next_ino(); if (S_ISDIR(inf->mode)) { inode->i_nlink = 2; diff --git a/fs/bfs/dir.c b/fs/bfs/dir.c index d967e05..685ecff 100644 --- a/fs/bfs/dir.c +++ b/fs/bfs/dir.c @@ -176,7 +176,7 @@ static int bfs_link(struct dentry *old, struct inode *dir, inc_nlink(inode); inode->i_ctime = CURRENT_TIME_SEC; mark_inode_dirty(inode); - atomic_inc(&inode->i_count); + ihold(inode); d_instantiate(new, inode); mutex_unlock(&info->bfs_lock); return 0; diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c index 139fc80..29990f0 100644 --- a/fs/binfmt_misc.c +++ b/fs/binfmt_misc.c @@ -495,6 +495,7 @@ static struct inode *bm_get_inode(struct super_block *sb, int mode) struct inode * inode = new_inode(sb); if (inode) { + inode->i_ino = get_next_ino(); inode->i_mode = mode; inode->i_atime = inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb); diff --git a/fs/block_dev.c b/fs/block_dev.c index b737451..dea3b62 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -48,6 +48,21 @@ inline struct block_device *I_BDEV(struct inode *inode) EXPORT_SYMBOL(I_BDEV); +/* + * move the inode from it's current bdi to the a new bdi. if the inode is dirty + * we need to move it onto the dirty list of @dst so that the inode is always + * on the right list. + */ +static void bdev_inode_switch_bdi(struct inode *inode, + struct backing_dev_info *dst) +{ + spin_lock(&inode_lock); + inode->i_data.backing_dev_info = dst; + if (inode->i_state & I_DIRTY) + list_move(&inode->i_wb_list, &dst->wb.b_dirty); + spin_unlock(&inode_lock); +} + static sector_t max_block(struct block_device *bdev) { sector_t retval = ~((sector_t)0); @@ -550,7 +565,7 @@ EXPORT_SYMBOL(bdget); */ struct block_device *bdgrab(struct block_device *bdev) { - atomic_inc(&bdev->bd_inode->i_count); + ihold(bdev->bd_inode); return bdev; } @@ -580,7 +595,7 @@ static struct block_device *bd_acquire(struct inode *inode) spin_lock(&bdev_lock); bdev = inode->i_bdev; if (bdev) { - atomic_inc(&bdev->bd_inode->i_count); + ihold(bdev->bd_inode); spin_unlock(&bdev_lock); return bdev; } @@ -591,12 +606,12 @@ static struct block_device *bd_acquire(struct inode *inode) spin_lock(&bdev_lock); if (!inode->i_bdev) { /* - * We take an additional bd_inode->i_count for inode, + * We take an additional reference to bd_inode, * and it's released in clear_inode() of inode. * So, we can access it via ->i_mapping always * without igrab(). */ - atomic_inc(&bdev->bd_inode->i_count); + ihold(bdev->bd_inode); inode->i_bdev = bdev; inode->i_mapping = bdev->bd_inode->i_mapping; list_add(&inode->i_devices, &bdev->bd_inodes); @@ -1390,7 +1405,7 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part) bdi = blk_get_backing_dev_info(bdev); if (bdi == NULL) bdi = &default_backing_dev_info; - bdev->bd_inode->i_data.backing_dev_info = bdi; + bdev_inode_switch_bdi(bdev->bd_inode, bdi); } if (bdev->bd_invalidated) rescan_partitions(disk, bdev); @@ -1405,8 +1420,8 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part) if (ret) goto out_clear; bdev->bd_contains = whole; - bdev->bd_inode->i_data.backing_dev_info = - whole->bd_inode->i_data.backing_dev_info; + bdev_inode_switch_bdi(bdev->bd_inode, + whole->bd_inode->i_data.backing_dev_info); bdev->bd_part = disk_get_part(disk, partno); if (!(disk->flags & GENHD_FL_UP) || !bdev->bd_part || !bdev->bd_part->nr_sects) { @@ -1439,7 +1454,7 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part) disk_put_part(bdev->bd_part); bdev->bd_disk = NULL; bdev->bd_part = NULL; - bdev->bd_inode->i_data.backing_dev_info = &default_backing_dev_info; + bdev_inode_switch_bdi(bdev->bd_inode, &default_backing_dev_info); if (bdev != bdev->bd_contains) __blkdev_put(bdev->bd_contains, mode, 1); bdev->bd_contains = NULL; @@ -1533,7 +1548,8 @@ static int __blkdev_put(struct block_device *bdev, fmode_t mode, int for_part) disk_put_part(bdev->bd_part); bdev->bd_part = NULL; bdev->bd_disk = NULL; - bdev->bd_inode->i_data.backing_dev_info = &default_backing_dev_info; + bdev_inode_switch_bdi(bdev->bd_inode, + &default_backing_dev_info); if (bdev != bdev->bd_contains) victim = bdev->bd_contains; bdev->bd_contains = NULL; diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index c038644..64f99cf 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -3849,7 +3849,7 @@ again: p = &root->inode_tree.rb_node; parent = NULL; - if (hlist_unhashed(&inode->i_hash)) + if (inode_unhashed(inode)) return; spin_lock(&root->inode_lock); @@ -4758,7 +4758,7 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir, } btrfs_set_trans_block_group(trans, dir); - atomic_inc(&inode->i_count); + ihold(inode); err = btrfs_add_nondir(trans, dentry, inode, 1, index); diff --git a/fs/buffer.c b/fs/buffer.c index 8d595ab..5930e38 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -1833,9 +1833,11 @@ void page_zero_new_buffers(struct page *page, unsigned from, unsigned to) } EXPORT_SYMBOL(page_zero_new_buffers); -int block_prepare_write(struct page *page, unsigned from, unsigned to, +int __block_write_begin(struct page *page, loff_t pos, unsigned len, get_block_t *get_block) { + unsigned from = pos & (PAGE_CACHE_SIZE - 1); + unsigned to = from + len; struct inode *inode = page->mapping->host; unsigned block_start, block_end; sector_t block; @@ -1915,7 +1917,7 @@ int block_prepare_write(struct page *page, unsigned from, unsigned to, } return err; } -EXPORT_SYMBOL(block_prepare_write); +EXPORT_SYMBOL(__block_write_begin); static int __block_commit_write(struct inode *inode, struct page *page, unsigned from, unsigned to) @@ -1952,15 +1954,6 @@ static int __block_commit_write(struct inode *inode, struct page *page, return 0; } -int __block_write_begin(struct page *page, loff_t pos, unsigned len, - get_block_t *get_block) -{ - unsigned start = pos & (PAGE_CACHE_SIZE - 1); - - return block_prepare_write(page, start, start + len, get_block); -} -EXPORT_SYMBOL(__block_write_begin); - /* * block_write_begin takes care of the basic task of block allocation and * bringing partial write blocks uptodate first. @@ -2378,7 +2371,7 @@ block_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf, else end = PAGE_CACHE_SIZE; - ret = block_prepare_write(page, 0, end, get_block); + ret = __block_write_begin(page, 0, end, get_block); if (!ret) ret = block_commit_write(page, 0, end); @@ -2465,11 +2458,10 @@ int nobh_write_begin(struct address_space *mapping, *fsdata = NULL; if (page_has_buffers(page)) { - unlock_page(page); - page_cache_release(page); - *pagep = NULL; - return block_write_begin(mapping, pos, len, flags, pagep, - get_block); + ret = __block_write_begin(page, pos, len, get_block); + if (unlikely(ret)) + goto out_release; + return ret; } if (PageMappedToDisk(page)) diff --git a/fs/coda/dir.c b/fs/coda/dir.c index 96fbeab..5d8b355 100644 --- a/fs/coda/dir.c +++ b/fs/coda/dir.c @@ -276,7 +276,7 @@ static int coda_link(struct dentry *source_de, struct inode *dir_inode, } coda_dir_update_mtime(dir_inode); - atomic_inc(&inode->i_count); + ihold(inode); d_instantiate(de, inode); inc_nlink(inode); return 0; diff --git a/fs/configfs/inode.c b/fs/configfs/inode.c index cf78d44..253476d 100644 --- a/fs/configfs/inode.c +++ b/fs/configfs/inode.c @@ -135,6 +135,7 @@ struct inode * configfs_new_inode(mode_t mode, struct configfs_dirent * sd) { struct inode * inode = new_inode(configfs_sb); if (inode) { + inode->i_ino = get_next_ino(); inode->i_mapping->a_ops = &configfs_aops; inode->i_mapping->backing_dev_info = &configfs_backing_dev_info; inode->i_op = &configfs_inode_operations; diff --git a/fs/dcache.c b/fs/dcache.c index 83293be..23702a9 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -67,33 +67,43 @@ struct dentry_stat_t dentry_stat = { .age_limit = 45, }; -static void __d_free(struct dentry *dentry) +static struct percpu_counter nr_dentry __cacheline_aligned_in_smp; +static struct percpu_counter nr_dentry_unused __cacheline_aligned_in_smp; + +#if defined(CONFIG_SYSCTL) && defined(CONFIG_PROC_FS) +int proc_nr_dentry(ctl_table *table, int write, void __user *buffer, + size_t *lenp, loff_t *ppos) +{ + dentry_stat.nr_dentry = percpu_counter_sum_positive(&nr_dentry); + dentry_stat.nr_unused = percpu_counter_sum_positive(&nr_dentry_unused); + return proc_dointvec(table, write, buffer, lenp, ppos); +} +#endif + +static void __d_free(struct rcu_head *head) { + struct dentry *dentry = container_of(head, struct dentry, d_u.d_rcu); + WARN_ON(!list_empty(&dentry->d_alias)); if (dname_external(dentry)) kfree(dentry->d_name.name); kmem_cache_free(dentry_cache, dentry); } -static void d_callback(struct rcu_head *head) -{ - struct dentry * dentry = container_of(head, struct dentry, d_u.d_rcu); - __d_free(dentry); -} - /* - * no dcache_lock, please. The caller must decrement dentry_stat.nr_dentry - * inside dcache_lock. + * no dcache_lock, please. */ static void d_free(struct dentry *dentry) { + percpu_counter_dec(&nr_dentry); if (dentry->d_op && dentry->d_op->d_release) dentry->d_op->d_release(dentry); + /* if dentry was never inserted into hash, immediate free is OK */ if (hlist_unhashed(&dentry->d_hash)) - __d_free(dentry); + __d_free(&dentry->d_u.d_rcu); else - call_rcu(&dentry->d_u.d_rcu, d_callback); + call_rcu(&dentry->d_u.d_rcu, __d_free); } /* @@ -123,37 +133,34 @@ static void dentry_iput(struct dentry * dentry) } /* - * dentry_lru_(add|add_tail|del|del_init) must be called with dcache_lock held. + * dentry_lru_(add|del|move_tail) must be called with dcache_lock held. */ static void dentry_lru_add(struct dentry *dentry) { - list_add(&dentry->d_lru, &dentry->d_sb->s_dentry_lru); - dentry->d_sb->s_nr_dentry_unused++; - dentry_stat.nr_unused++; -} - -static void dentry_lru_add_tail(struct dentry *dentry) -{ - list_add_tail(&dentry->d_lru, &dentry->d_sb->s_dentry_lru); - dentry->d_sb->s_nr_dentry_unused++; - dentry_stat.nr_unused++; + if (list_empty(&dentry->d_lru)) { + list_add(&dentry->d_lru, &dentry->d_sb->s_dentry_lru); + dentry->d_sb->s_nr_dentry_unused++; + percpu_counter_inc(&nr_dentry_unused); + } } static void dentry_lru_del(struct dentry *dentry) { if (!list_empty(&dentry->d_lru)) { - list_del(&dentry->d_lru); + list_del_init(&dentry->d_lru); dentry->d_sb->s_nr_dentry_unused--; - dentry_stat.nr_unused--; + percpu_counter_dec(&nr_dentry_unused); } } -static void dentry_lru_del_init(struct dentry *dentry) +static void dentry_lru_move_tail(struct dentry *dentry) { - if (likely(!list_empty(&dentry->d_lru))) { - list_del_init(&dentry->d_lru); - dentry->d_sb->s_nr_dentry_unused--; - dentry_stat.nr_unused--; + if (list_empty(&dentry->d_lru)) { + list_add_tail(&dentry->d_lru, &dentry->d_sb->s_dentry_lru); + dentry->d_sb->s_nr_dentry_unused++; + percpu_counter_inc(&nr_dentry_unused); + } else { + list_move_tail(&dentry->d_lru, &dentry->d_sb->s_dentry_lru); } } @@ -172,7 +179,6 @@ static struct dentry *d_kill(struct dentry *dentry) struct dentry *parent; list_del(&dentry->d_u.d_child); - dentry_stat.nr_dentry--; /* For d_free, below */ /*drops the locks, at that point nobody can reach this dentry */ dentry_iput(dentry); if (IS_ROOT(dentry)) @@ -237,13 +243,15 @@ repeat: if (dentry->d_op->d_delete(dentry)) goto unhash_it; } + /* Unreachable? Get rid of it */ if (d_unhashed(dentry)) goto kill_it; - if (list_empty(&dentry->d_lru)) { - dentry->d_flags |= DCACHE_REFERENCED; - dentry_lru_add(dentry); - } + + /* Otherwise leave it cached and ensure it's on the LRU */ + dentry->d_flags |= DCACHE_REFERENCED; + dentry_lru_add(dentry); + spin_unlock(&dentry->d_lock); spin_unlock(&dcache_lock); return; @@ -318,11 +326,10 @@ int d_invalidate(struct dentry * dentry) EXPORT_SYMBOL(d_invalidate); /* This should be called _only_ with dcache_lock held */ - static inline struct dentry * __dget_locked(struct dentry *dentry) { atomic_inc(&dentry->d_count); - dentry_lru_del_init(dentry); + dentry_lru_del(dentry); return dentry; } @@ -441,73 +448,27 @@ static void prune_one_dentry(struct dentry * dentry) if (dentry->d_op && dentry->d_op->d_delete) dentry->d_op->d_delete(dentry); - dentry_lru_del_init(dentry); + dentry_lru_del(dentry); __d_drop(dentry); dentry = d_kill(dentry); spin_lock(&dcache_lock); } } -/* - * Shrink the dentry LRU on a given superblock. - * @sb : superblock to shrink dentry LRU. - * @count: If count is NULL, we prune all dentries on superblock. - * @flags: If flags is non-zero, we need to do special processing based on - * which flags are set. This means we don't need to maintain multiple - * similar copies of this loop. - */ -static void __shrink_dcache_sb(struct super_block *sb, int *count, int flags) +static void shrink_dentry_list(struct list_head *list) { - LIST_HEAD(referenced); - LIST_HEAD(tmp); struct dentry *dentry; - int cnt = 0; - BUG_ON(!sb); - BUG_ON((flags & DCACHE_REFERENCED) && count == NULL); - spin_lock(&dcache_lock); - if (count != NULL) - /* called from prune_dcache() and shrink_dcache_parent() */ - cnt = *count; -restart: - if (count == NULL) - list_splice_init(&sb->s_dentry_lru, &tmp); - else { - while (!list_empty(&sb->s_dentry_lru)) { - dentry = list_entry(sb->s_dentry_lru.prev, - struct dentry, d_lru); - BUG_ON(dentry->d_sb != sb); + while (!list_empty(list)) { + dentry = list_entry(list->prev, struct dentry, d_lru); + dentry_lru_del(dentry); - spin_lock(&dentry->d_lock); - /* - * If we are honouring the DCACHE_REFERENCED flag and - * the dentry has this flag set, don't free it. Clear - * the flag and put it back on the LRU. - */ - if ((flags & DCACHE_REFERENCED) - && (dentry->d_flags & DCACHE_REFERENCED)) { - dentry->d_flags &= ~DCACHE_REFERENCED; - list_move(&dentry->d_lru, &referenced); - spin_unlock(&dentry->d_lock); - } else { - list_move_tail(&dentry->d_lru, &tmp); - spin_unlock(&dentry->d_lock); - cnt--; - if (!cnt) - break; - } - cond_resched_lock(&dcache_lock); - } - } - while (!list_empty(&tmp)) { - dentry = list_entry(tmp.prev, struct dentry, d_lru); - dentry_lru_del_init(dentry); - spin_lock(&dentry->d_lock); /* * We found an inuse dentry which was not removed from * the LRU because of laziness during lookup. Do not free * it - just keep it off the LRU list. */ + spin_lock(&dentry->d_lock); if (atomic_read(&dentry->d_count)) { spin_unlock(&dentry->d_lock); continue; @@ -516,13 +477,60 @@ restart: /* dentry->d_lock was dropped in prune_one_dentry() */ cond_resched_lock(&dcache_lock); } - if (count == NULL && !list_empty(&sb->s_dentry_lru)) - goto restart; - if (count != NULL) - *count = cnt; +} + +/** + * __shrink_dcache_sb - shrink the dentry LRU on a given superblock + * @sb: superblock to shrink dentry LRU. + * @count: number of entries to prune + * @flags: flags to control the dentry processing + * + * If flags contains DCACHE_REFERENCED reference dentries will not be pruned. + */ +static void __shrink_dcache_sb(struct super_block *sb, int *count, int flags) +{ + /* called from prune_dcache() and shrink_dcache_parent() */ + struct dentry *dentry; + LIST_HEAD(referenced); + LIST_HEAD(tmp); + int cnt = *count; + + spin_lock(&dcache_lock); + while (!list_empty(&sb->s_dentry_lru)) { + dentry = list_entry(sb->s_dentry_lru.prev, + struct dentry, d_lru); + BUG_ON(dentry->d_sb != sb); + + /* + * If we are honouring the DCACHE_REFERENCED flag and the + * dentry has this flag set, don't free it. Clear the flag + * and put it back on the LRU. + */ + if (flags & DCACHE_REFERENCED) { + spin_lock(&dentry->d_lock); + if (dentry->d_flags & DCACHE_REFERENCED) { + dentry->d_flags &= ~DCACHE_REFERENCED; + list_move(&dentry->d_lru, &referenced); + spin_unlock(&dentry->d_lock); + cond_resched_lock(&dcache_lock); + continue; + } + spin_unlock(&dentry->d_lock); + } + + list_move_tail(&dentry->d_lru, &tmp); + if (!--cnt) + break; + cond_resched_lock(&dcache_lock); + } + + *count = cnt; + shrink_dentry_list(&tmp); + if (!list_empty(&referenced)) list_splice(&referenced, &sb->s_dentry_lru); spin_unlock(&dcache_lock); + } /** @@ -538,7 +546,7 @@ static void prune_dcache(int count) { struct super_block *sb, *p = NULL; int w_count; - int unused = dentry_stat.nr_unused; + int unused = percpu_counter_sum_positive(&nr_dentry_unused); int prune_ratio; int pruned; @@ -608,13 +616,19 @@ static void prune_dcache(int count) * shrink_dcache_sb - shrink dcache for a superblock * @sb: superblock * - * Shrink the dcache for the specified super block. This - * is used to free the dcache before unmounting a file - * system + * Shrink the dcache for the specified super block. This is used to free + * the dcache before unmounting a file system. */ -void shrink_dcache_sb(struct super_block * sb) +void shrink_dcache_sb(struct super_block *sb) { - __shrink_dcache_sb(sb, NULL, 0); + LIST_HEAD(tmp); + + spin_lock(&dcache_lock); + while (!list_empty(&sb->s_dentry_lru)) { + list_splice_init(&sb->s_dentry_lru, &tmp); + shrink_dentry_list(&tmp); + } + spin_unlock(&dcache_lock); } EXPORT_SYMBOL(shrink_dcache_sb); @@ -632,7 +646,7 @@ static void shrink_dcache_for_umount_subtree(struct dentry *dentry) /* detach this root from the system */ spin_lock(&dcache_lock); - dentry_lru_del_init(dentry); + dentry_lru_del(dentry); __d_drop(dentry); spin_unlock(&dcache_lock); @@ -646,7 +660,7 @@ static void shrink_dcache_for_umount_subtree(struct dentry *dentry) spin_lock(&dcache_lock); list_for_each_entry(loop, &dentry->d_subdirs, d_u.d_child) { - dentry_lru_del_init(loop); + dentry_lru_del(loop); __d_drop(loop); cond_resched_lock(&dcache_lock); } @@ -703,20 +717,13 @@ static void shrink_dcache_for_umount_subtree(struct dentry *dentry) * otherwise we ascend to the parent and move to the * next sibling if there is one */ if (!parent) - goto out; - + return; dentry = parent; - } while (list_empty(&dentry->d_subdirs)); dentry = list_entry(dentry->d_subdirs.next, struct dentry, d_u.d_child); } -out: - /* several dentries were freed, need to correct nr_dentry */ - spin_lock(&dcache_lock); - dentry_stat.nr_dentry -= detached; - spin_unlock(&dcache_lock); } /* @@ -830,14 +837,15 @@ resume: struct dentry *dentry = list_entry(tmp, struct dentry, d_u.d_child); next = tmp->next; - dentry_lru_del_init(dentry); /* * move only zero ref count dentries to the end * of the unused list for prune_dcache */ if (!atomic_read(&dentry->d_count)) { - dentry_lru_add_tail(dentry); + dentry_lru_move_tail(dentry); found++; + } else { + dentry_lru_del(dentry); } /* @@ -900,12 +908,16 @@ EXPORT_SYMBOL(shrink_dcache_parent); */ static int shrink_dcache_memory(struct shrinker *shrink, int nr, gfp_t gfp_mask) { + int nr_unused; + if (nr) { if (!(gfp_mask & __GFP_FS)) return -1; prune_dcache(nr); } - return (dentry_stat.nr_unused / 100) * sysctl_vfs_cache_pressure; + + nr_unused = percpu_counter_sum_positive(&nr_dentry_unused); + return (nr_unused / 100) * sysctl_vfs_cache_pressure; } static struct shrinker dcache_shrinker = { @@ -972,9 +984,10 @@ struct dentry *d_alloc(struct dentry * parent, const struct qstr *name) spin_lock(&dcache_lock); if (parent) list_add(&dentry->d_u.d_child, &parent->d_subdirs); - dentry_stat.nr_dentry++; spin_unlock(&dcache_lock); + percpu_counter_inc(&nr_dentry); + return dentry; } EXPORT_SYMBOL(d_alloc); @@ -1478,33 +1491,26 @@ out: * This is used by ncpfs in its readdir implementation. * Zero is returned in the dentry is invalid. */ - -int d_validate(struct dentry *dentry, struct dentry *dparent) +int d_validate(struct dentry *dentry, struct dentry *parent) { - struct hlist_head *base; - struct hlist_node *lhp; + struct hlist_head *head = d_hash(parent, dentry->d_name.hash); + struct hlist_node *node; + struct dentry *d; /* Check whether the ptr might be valid at all.. */ if (!kmem_ptr_validate(dentry_cache, dentry)) - goto out; - - if (dentry->d_parent != dparent) - goto out; + return 0; + if (dentry->d_parent != parent) + return 0; - spin_lock(&dcache_lock); - base = d_hash(dparent, dentry->d_name.hash); - hlist_for_each(lhp,base) { - /* hlist_for_each_entry_rcu() not required for d_hash list - * as it is parsed under dcache_lock - */ - if (dentry == hlist_entry(lhp, struct dentry, d_hash)) { - __dget_locked(dentry); - spin_unlock(&dcache_lock); + rcu_read_lock(); + hlist_for_each_entry_rcu(d, node, head, d_hash) { + if (d == dentry) { + dget(dentry); return 1; } } - spin_unlock(&dcache_lock); -out: + rcu_read_unlock(); return 0; } EXPORT_SYMBOL(d_validate); @@ -1994,7 +2000,7 @@ global_root: * Returns a pointer into the buffer or an error code if the * path was too long. * - * "buflen" should be positive. Caller holds the dcache_lock. + * "buflen" should be positive. * * If path is not reachable from the supplied root, then the value of * root is changed (without modifying refcounts). @@ -2006,10 +2012,12 @@ char *__d_path(const struct path *path, struct path *root, int error; prepend(&res, &buflen, "\0", 1); + spin_lock(&dcache_lock); error = prepend_path(path, root, &res, &buflen); + spin_unlock(&dcache_lock); + if (error) return ERR_PTR(error); - return res; } @@ -2419,6 +2427,9 @@ static void __init dcache_init(void) { int loop; + percpu_counter_init(&nr_dentry, 0); + percpu_counter_init(&nr_dentry_unused, 0); + /* * A constructor could be added for stable state like the lists, * but it is probably not worth it because of the cache nature diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c index 30a87b3..a4ed838 100644 --- a/fs/debugfs/inode.c +++ b/fs/debugfs/inode.c @@ -40,6 +40,7 @@ static struct inode *debugfs_get_inode(struct super_block *sb, int mode, dev_t d struct inode *inode = new_inode(sb); if (inode) { + inode->i_ino = get_next_ino(); inode->i_mode = mode; inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; switch (mode & S_IFMT) { diff --git a/fs/exofs/file.c b/fs/exofs/file.c index 68cb23e..b905c79 100644 --- a/fs/exofs/file.c +++ b/fs/exofs/file.c @@ -46,10 +46,6 @@ static int exofs_file_fsync(struct file *filp, int datasync) { int ret; struct inode *inode = filp->f_mapping->host; - struct writeback_control wbc = { - .sync_mode = WB_SYNC_ALL, - .nr_to_write = 0, /* metadata-only; caller takes care of data */ - }; struct super_block *sb; if (!(inode->i_state & I_DIRTY)) @@ -57,7 +53,7 @@ static int exofs_file_fsync(struct file *filp, int datasync) if (datasync && !(inode->i_state & I_DIRTY_DATASYNC)) return 0; - ret = sync_inode(inode, &wbc); + ret = sync_inode_metadata(inode, 1); /* This is a good place to write the sb */ /* TODO: Sechedule an sb-sync on create */ diff --git a/fs/exofs/namei.c b/fs/exofs/namei.c index b7dd0c2..264e95d 100644 --- a/fs/exofs/namei.c +++ b/fs/exofs/namei.c @@ -153,7 +153,7 @@ static int exofs_link(struct dentry *old_dentry, struct inode *dir, inode->i_ctime = CURRENT_TIME; inode_inc_link_count(inode); - atomic_inc(&inode->i_count); + ihold(inode); return exofs_add_nondir(dentry, inode); } diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c index e9e1759..51b3040 100644 --- a/fs/exportfs/expfs.c +++ b/fs/exportfs/expfs.c @@ -74,21 +74,20 @@ static struct dentry * find_disconnected_root(struct dentry *dentry) { dget(dentry); - spin_lock(&dentry->d_lock); - while (!IS_ROOT(dentry) && - (dentry->d_parent->d_flags & DCACHE_DISCONNECTED)) { - struct dentry *parent = dentry->d_parent; - dget(parent); - spin_unlock(&dentry->d_lock); + while (!IS_ROOT(dentry)) { + struct dentry *parent = dget_parent(dentry); + + if (!(parent->d_flags & DCACHE_DISCONNECTED)) { + dput(parent); + break; + } + dput(dentry); dentry = parent; - spin_lock(&dentry->d_lock); } - spin_unlock(&dentry->d_lock); return dentry; } - /* * Make sure target_dir is fully connected to the dentry tree. * diff --git a/fs/ext2/dir.c b/fs/ext2/dir.c index 7641098..2709b34 100644 --- a/fs/ext2/dir.c +++ b/fs/ext2/dir.c @@ -98,7 +98,7 @@ static int ext2_commit_chunk(struct page *page, loff_t pos, unsigned len) if (IS_DIRSYNC(dir)) { err = write_one_page(page, 1); if (!err) - err = ext2_sync_inode(dir); + err = sync_inode_metadata(dir, 1); } else { unlock_page(page); } diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h index 416daa6..6346a2a 100644 --- a/fs/ext2/ext2.h +++ b/fs/ext2/ext2.h @@ -120,7 +120,6 @@ extern unsigned long ext2_count_free (struct buffer_head *, unsigned); extern struct inode *ext2_iget (struct super_block *, unsigned long); extern int ext2_write_inode (struct inode *, struct writeback_control *); extern void ext2_evict_inode(struct inode *); -extern int ext2_sync_inode (struct inode *); extern int ext2_get_block(struct inode *, sector_t, struct buffer_head *, int); extern int ext2_setattr (struct dentry *, struct iattr *); extern void ext2_set_inode_flags(struct inode *inode); diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c index 533699c..40ad210 100644 --- a/fs/ext2/inode.c +++ b/fs/ext2/inode.c @@ -1203,7 +1203,7 @@ static int ext2_setsize(struct inode *inode, loff_t newsize) inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC; if (inode_needs_sync(inode)) { sync_mapping_buffers(inode->i_mapping); - ext2_sync_inode (inode); + sync_inode_metadata(inode, 1); } else { mark_inode_dirty(inode); } @@ -1523,15 +1523,6 @@ int ext2_write_inode(struct inode *inode, struct writeback_control *wbc) return __ext2_write_inode(inode, wbc->sync_mode == WB_SYNC_ALL); } -int ext2_sync_inode(struct inode *inode) -{ - struct writeback_control wbc = { - .sync_mode = WB_SYNC_ALL, - .nr_to_write = 0, /* sys_fsync did this */ - }; - return sync_inode(inode, &wbc); -} - int ext2_setattr(struct dentry *dentry, struct iattr *iattr) { struct inode *inode = dentry->d_inode; diff --git a/fs/ext2/namei.c b/fs/ext2/namei.c index 71efb0e..f8aecd2 100644 --- a/fs/ext2/namei.c +++ b/fs/ext2/namei.c @@ -206,7 +206,7 @@ static int ext2_link (struct dentry * old_dentry, struct inode * dir, inode->i_ctime = CURRENT_TIME_SEC; inode_inc_link_count(inode); - atomic_inc(&inode->i_count); + ihold(inode); err = ext2_add_link(dentry, inode); if (!err) { diff --git a/fs/ext2/super.c b/fs/ext2/super.c index 85df87d..09013206 100644 --- a/fs/ext2/super.c +++ b/fs/ext2/super.c @@ -1221,9 +1221,7 @@ static int ext2_remount (struct super_block * sb, int * flags, char * data) } es = sbi->s_es; - if (((sbi->s_mount_opt & EXT2_MOUNT_XIP) != - (old_mount_opt & EXT2_MOUNT_XIP)) && - invalidate_inodes(sb)) { + if ((sbi->s_mount_opt ^ old_mount_opt) & EXT2_MOUNT_XIP) { ext2_msg(sb, KERN_WARNING, "warning: refusing change of " "xip flag with busy inodes while remounting"); sbi->s_mount_opt &= ~EXT2_MOUNT_XIP; diff --git a/fs/ext2/xattr.c b/fs/ext2/xattr.c index 8c29ae1..f84700b 100644 --- a/fs/ext2/xattr.c +++ b/fs/ext2/xattr.c @@ -699,7 +699,7 @@ ext2_xattr_set2(struct inode *inode, struct buffer_head *old_bh, EXT2_I(inode)->i_file_acl = new_bh ? new_bh->b_blocknr : 0; inode->i_ctime = CURRENT_TIME_SEC; if (IS_SYNC(inode)) { - error = ext2_sync_inode (inode); + error = sync_inode_metadata(inode, 1); /* In case sync failed due to ENOSPC the inode was actually * written (only some dirty data were not) so we just proceed * as if nothing happened and cleanup the unused block */ diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c index 5e0faf4..ad05353 100644 --- a/fs/ext3/inode.c +++ b/fs/ext3/inode.c @@ -1696,8 +1696,8 @@ static int ext3_journalled_writepage(struct page *page, * doesn't seem much point in redirtying the page here. */ ClearPageChecked(page); - ret = block_prepare_write(page, 0, PAGE_CACHE_SIZE, - ext3_get_block); + ret = __block_write_begin(page, 0, PAGE_CACHE_SIZE, + ext3_get_block); if (ret != 0) { ext3_journal_stop(handle); goto out_unlock; diff --git a/fs/ext3/namei.c b/fs/ext3/namei.c index 2b35ddb..bce9dce 100644 --- a/fs/ext3/namei.c +++ b/fs/ext3/namei.c @@ -2260,7 +2260,7 @@ retry: inode->i_ctime = CURRENT_TIME_SEC; inc_nlink(inode); - atomic_inc(&inode->i_count); + ihold(inode); err = ext3_add_entry(handle, dentry, inode); if (!err) { diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 4b8debe..49635ef 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -1538,10 +1538,10 @@ static int do_journal_get_write_access(handle_t *handle, if (!buffer_mapped(bh) || buffer_freed(bh)) return 0; /* - * __block_prepare_write() could have dirtied some buffers. Clean + * __block_write_begin() could have dirtied some buffers. Clean * the dirty bit as jbd2_journal_get_write_access() could complain * otherwise about fs integrity issues. Setting of the dirty bit - * by __block_prepare_write() isn't a real problem here as we clear + * by __block_write_begin() isn't a real problem here as we clear * the bit before releasing a page lock and thus writeback cannot * ever write the buffer. */ @@ -2550,8 +2550,7 @@ static int ext4_da_get_block_prep(struct inode *inode, sector_t iblock, if (buffer_delay(bh)) return 0; /* Not sure this could or should happen */ /* - * XXX: __block_prepare_write() unmaps passed block, - * is it OK? + * XXX: __block_write_begin() unmaps passed block, is it OK? */ ret = ext4_da_reserve_space(inode, iblock); if (ret) @@ -2583,7 +2582,7 @@ static int ext4_da_get_block_prep(struct inode *inode, sector_t iblock, /* * This function is used as a standard get_block_t calback function * when there is no desire to allocate any blocks. It is used as a - * callback function for block_prepare_write() and block_write_full_page(). + * callback function for block_write_begin() and block_write_full_page(). * These functions should only try to map a single block at a time. * * Since this function doesn't do block allocations even if the caller @@ -2743,7 +2742,7 @@ static int ext4_writepage(struct page *page, * all are mapped and non delay. We don't want to * do block allocation here. */ - ret = block_prepare_write(page, 0, len, + ret = __block_write_begin(page, 0, len, noalloc_get_block_write); if (!ret) { page_bufs = page_buffers(page); diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index 19aa0d4..42f77b1 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -2373,6 +2373,7 @@ static int ext4_mb_init_backend(struct super_block *sb) printk(KERN_ERR "EXT4-fs: can't get new inode\n"); goto err_freesgi; } + sbi->s_buddy_cache->i_ino = get_next_ino(); EXT4_I(sbi->s_buddy_cache)->i_disksize = 0; for (i = 0; i < ngroups; i++) { desc = ext4_get_group_desc(sb, i, NULL); diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c index 314c0d3..bd39885 100644 --- a/fs/ext4/namei.c +++ b/fs/ext4/namei.c @@ -2312,7 +2312,7 @@ retry: inode->i_ctime = ext4_current_time(inode); ext4_inc_count(handle, inode); - atomic_inc(&inode->i_count); + ihold(inode); err = ext4_add_entry(handle, dentry, inode); if (!err) { diff --git a/fs/freevxfs/vxfs_inode.c b/fs/freevxfs/vxfs_inode.c index 79d1b4e..8c04eac 100644 --- a/fs/freevxfs/vxfs_inode.c +++ b/fs/freevxfs/vxfs_inode.c @@ -260,6 +260,7 @@ vxfs_get_fake_inode(struct super_block *sbp, struct vxfs_inode_info *vip) struct inode *ip = NULL; if ((ip = new_inode(sbp))) { + ip->i_ino = get_next_ino(); vxfs_iinit(ip, vip); ip->i_mapping->a_ops = &vxfs_aops; } diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index 9e46aec..aed881a 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -79,6 +79,11 @@ static inline struct backing_dev_info *inode_to_bdi(struct inode *inode) return sb->s_bdi; } +static inline struct inode *wb_inode(struct list_head *head) +{ + return list_entry(head, struct inode, i_wb_list); +} + static void bdi_queue_work(struct backing_dev_info *bdi, struct wb_writeback_work *work) { @@ -172,11 +177,11 @@ static void redirty_tail(struct inode *inode) if (!list_empty(&wb->b_dirty)) { struct inode *tail; - tail = list_entry(wb->b_dirty.next, struct inode, i_list); + tail = wb_inode(wb->b_dirty.next); if (time_before(inode->dirtied_when, tail->dirtied_when)) inode->dirtied_when = jiffies; } - list_move(&inode->i_list, &wb->b_dirty); + list_move(&inode->i_wb_list, &wb->b_dirty); } /* @@ -186,7 +191,7 @@ static void requeue_io(struct inode *inode) { struct bdi_writeback *wb = &inode_to_bdi(inode)->wb; - list_move(&inode->i_list, &wb->b_more_io); + list_move(&inode->i_wb_list, &wb->b_more_io); } static void inode_sync_complete(struct inode *inode) @@ -227,14 +232,14 @@ static void move_expired_inodes(struct list_head *delaying_queue, int do_sb_sort = 0; while (!list_empty(delaying_queue)) { - inode = list_entry(delaying_queue->prev, struct inode, i_list); + inode = wb_inode(delaying_queue->prev); if (older_than_this && inode_dirtied_after(inode, *older_than_this)) break; if (sb && sb != inode->i_sb) do_sb_sort = 1; sb = inode->i_sb; - list_move(&inode->i_list, &tmp); + list_move(&inode->i_wb_list, &tmp); } /* just one sb in list, splice to dispatch_queue and we're done */ @@ -245,12 +250,11 @@ static void move_expired_inodes(struct list_head *delaying_queue, /* Move inodes from one superblock together */ while (!list_empty(&tmp)) { - inode = list_entry(tmp.prev, struct inode, i_list); - sb = inode->i_sb; + sb = wb_inode(tmp.prev)->i_sb; list_for_each_prev_safe(pos, node, &tmp) { - inode = list_entry(pos, struct inode, i_list); + inode = wb_inode(pos); if (inode->i_sb == sb) - list_move(&inode->i_list, dispatch_queue); + list_move(&inode->i_wb_list, dispatch_queue); } } } @@ -408,16 +412,13 @@ writeback_single_inode(struct inode *inode, struct writeback_control *wbc) * completion. */ redirty_tail(inode); - } else if (atomic_read(&inode->i_count)) { - /* - * The inode is clean, inuse - */ - list_move(&inode->i_list, &inode_in_use); } else { /* - * The inode is clean, unused + * The inode is clean. At this point we either have + * a reference to the inode or it's on it's way out. + * No need to add it back to the LRU. */ - list_move(&inode->i_list, &inode_unused); + list_del_init(&inode->i_wb_list); } } inode_sync_complete(inode); @@ -465,8 +466,7 @@ static int writeback_sb_inodes(struct super_block *sb, struct bdi_writeback *wb, { while (!list_empty(&wb->b_io)) { long pages_skipped; - struct inode *inode = list_entry(wb->b_io.prev, - struct inode, i_list); + struct inode *inode = wb_inode(wb->b_io.prev); if (inode->i_sb != sb) { if (only_this_sb) { @@ -487,10 +487,16 @@ static int writeback_sb_inodes(struct super_block *sb, struct bdi_writeback *wb, return 0; } - if (inode->i_state & (I_NEW | I_WILL_FREE)) { + /* + * Don't bother with new inodes or inodes beeing freed, first + * kind does not need peridic writeout yet, and for the latter + * kind writeout is handled by the freer. + */ + if (inode->i_state & (I_NEW | I_FREEING | I_WILL_FREE)) { requeue_io(inode); continue; } + /* * Was this inode dirtied after sync_sb_inodes was called? * This keeps sync from extra jobs and livelock. @@ -498,7 +504,6 @@ static int writeback_sb_inodes(struct super_block *sb, struct bdi_writeback *wb, if (inode_dirtied_after(inode, wbc->wb_start)) return 1; - BUG_ON(inode->i_state & I_FREEING); __iget(inode); pages_skipped = wbc->pages_skipped; writeback_single_inode(inode, wbc); @@ -536,8 +541,7 @@ void writeback_inodes_wb(struct bdi_writeback *wb, queue_io(wb, wbc->older_than_this); while (!list_empty(&wb->b_io)) { - struct inode *inode = list_entry(wb->b_io.prev, - struct inode, i_list); + struct inode *inode = wb_inode(wb->b_io.prev); struct super_block *sb = inode->i_sb; if (!pin_sb_for_writeback(sb)) { @@ -675,8 +679,7 @@ static long wb_writeback(struct bdi_writeback *wb, */ spin_lock(&inode_lock); if (!list_empty(&wb->b_more_io)) { - inode = list_entry(wb->b_more_io.prev, - struct inode, i_list); + inode = wb_inode(wb->b_more_io.prev); trace_wbc_writeback_wait(&wbc, wb->bdi); inode_wait_for_writeback(inode); } @@ -727,7 +730,7 @@ static long wb_check_old_data_flush(struct bdi_writeback *wb) */ nr_pages = global_page_state(NR_FILE_DIRTY) + global_page_state(NR_UNSTABLE_NFS) + - (inodes_stat.nr_inodes - inodes_stat.nr_unused); + get_nr_dirty_inodes(); if (nr_pages) { struct wb_writeback_work work = { @@ -966,7 +969,7 @@ void __mark_inode_dirty(struct inode *inode, int flags) * dirty list. Add blockdev inodes as well. */ if (!S_ISBLK(inode->i_mode)) { - if (hlist_unhashed(&inode->i_hash)) + if (inode_unhashed(inode)) goto out; } if (inode->i_state & I_FREEING) @@ -994,7 +997,7 @@ void __mark_inode_dirty(struct inode *inode, int flags) } inode->dirtied_when = jiffies; - list_move(&inode->i_list, &bdi->wb.b_dirty); + list_move(&inode->i_wb_list, &bdi->wb.b_dirty); } } out: @@ -1094,8 +1097,7 @@ void writeback_inodes_sb(struct super_block *sb) WARN_ON(!rwsem_is_locked(&sb->s_umount)); - work.nr_pages = nr_dirty + nr_unstable + - (inodes_stat.nr_inodes - inodes_stat.nr_unused); + work.nr_pages = nr_dirty + nr_unstable + get_nr_dirty_inodes(); bdi_queue_work(sb->s_bdi, &work); wait_for_completion(&done); @@ -1202,3 +1204,23 @@ int sync_inode(struct inode *inode, struct writeback_control *wbc) return ret; } EXPORT_SYMBOL(sync_inode); + +/** + * sync_inode - write an inode to disk + * @inode: the inode to sync + * @wait: wait for I/O to complete. + * + * Write an inode to disk and adjust it's dirty state after completion. + * + * Note: only writes the actual inode, no associated data or other metadata. + */ +int sync_inode_metadata(struct inode *inode, int wait) +{ + struct writeback_control wbc = { + .sync_mode = wait ? WB_SYNC_ALL : WB_SYNC_NONE, + .nr_to_write = 0, /* metadata-only */ + }; + + return sync_inode(inode, &wbc); +} +EXPORT_SYMBOL(sync_inode_metadata); diff --git a/fs/fuse/control.c b/fs/fuse/control.c index 7367e17..4eba076 100644 --- a/fs/fuse/control.c +++ b/fs/fuse/control.c @@ -222,6 +222,7 @@ static struct dentry *fuse_ctl_add_dentry(struct dentry *parent, if (!inode) return NULL; + inode->i_ino = get_next_ino(); inode->i_mode = mode; inode->i_uid = fc->user_id; inode->i_gid = fc->group_id; diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c index 6b24afb..4f36f88 100644 --- a/fs/gfs2/aops.c +++ b/fs/gfs2/aops.c @@ -618,7 +618,6 @@ static int gfs2_write_begin(struct file *file, struct address_space *mapping, struct gfs2_alloc *al = NULL; pgoff_t index = pos >> PAGE_CACHE_SHIFT; unsigned from = pos & (PAGE_CACHE_SIZE - 1); - unsigned to = from + len; struct page *page; gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &ip->i_gh); @@ -691,7 +690,7 @@ static int gfs2_write_begin(struct file *file, struct address_space *mapping, } prepare_write: - error = block_prepare_write(page, from, to, gfs2_block_map); + error = __block_write_begin(page, from, len, gfs2_block_map); out: if (error == 0) return 0; diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c index aeafc23..cade1ac 100644 --- a/fs/gfs2/ops_fstype.c +++ b/fs/gfs2/ops_fstype.c @@ -1219,7 +1219,6 @@ fail_sb: fail_locking: init_locking(sdp, &mount_gh, UNDO); fail_lm: - invalidate_inodes(sb); gfs2_gl_hash_clear(sdp); gfs2_lm_unmount(sdp); fail_sys: diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c index 0534510..12cbea7 100644 --- a/fs/gfs2/ops_inode.c +++ b/fs/gfs2/ops_inode.c @@ -255,7 +255,7 @@ out_parent: gfs2_holder_uninit(ghs); gfs2_holder_uninit(ghs + 1); if (!error) { - atomic_inc(&inode->i_count); + ihold(inode); d_instantiate(dentry, inode); mark_inode_dirty(inode); } @@ -1294,7 +1294,7 @@ static int write_empty_blocks(struct page *page, unsigned from, unsigned to) int error; if (!page_has_buffers(page)) { - error = block_prepare_write(page, from, to, gfs2_block_map); + error = __block_write_begin(page, from, to - from, gfs2_block_map); if (unlikely(error)) return error; @@ -1313,7 +1313,7 @@ static int write_empty_blocks(struct page *page, unsigned from, unsigned to) next += bh->b_size; if (buffer_mapped(bh)) { if (end) { - error = block_prepare_write(page, start, end, + error = __block_write_begin(page, start, end - start, gfs2_block_map); if (unlikely(error)) return error; @@ -1328,7 +1328,7 @@ static int write_empty_blocks(struct page *page, unsigned from, unsigned to) } while (next < to); if (end) { - error = block_prepare_write(page, start, end, gfs2_block_map); + error = __block_write_begin(page, start, end - start, gfs2_block_map); if (unlikely(error)) return error; empty_write_end(page, start, end); diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c index 047d117..2b2c499 100644 --- a/fs/gfs2/super.c +++ b/fs/gfs2/super.c @@ -857,7 +857,6 @@ restart: gfs2_clear_rgrpd(sdp); gfs2_jindex_free(sdp); /* Take apart glock structures and buffer lists */ - invalidate_inodes(sdp->sd_vfs); gfs2_gl_hash_clear(sdp); /* Unmount the locking protocol */ gfs2_lm_unmount(sdp); diff --git a/fs/hfs/hfs_fs.h b/fs/hfs/hfs_fs.h index 4f55651..c8cffb8 100644 --- a/fs/hfs/hfs_fs.h +++ b/fs/hfs/hfs_fs.h @@ -147,8 +147,6 @@ struct hfs_sb_info { u16 blockoffset; int fs_div; - - struct hlist_head rsrc_inodes; }; #define HFS_FLG_BITMAP_DIRTY 0 @@ -254,17 +252,6 @@ static inline void hfs_bitmap_dirty(struct super_block *sb) sb->s_dirt = 1; } -static inline void hfs_buffer_sync(struct buffer_head *bh) -{ - while (buffer_locked(bh)) { - wait_on_buffer(bh); - } - if (buffer_dirty(bh)) { - ll_rw_block(WRITE, 1, &bh); - wait_on_buffer(bh); - } -} - #define sb_bread512(sb, sec, data) ({ \ struct buffer_head *__bh; \ sector_t __block; \ diff --git a/fs/hfs/inode.c b/fs/hfs/inode.c index 397b7ad..dffb4e9 100644 --- a/fs/hfs/inode.c +++ b/fs/hfs/inode.c @@ -524,7 +524,7 @@ static struct dentry *hfs_file_lookup(struct inode *dir, struct dentry *dentry, HFS_I(inode)->rsrc_inode = dir; HFS_I(dir)->rsrc_inode = inode; igrab(dir); - hlist_add_head(&inode->i_hash, &HFS_SB(dir->i_sb)->rsrc_inodes); + hlist_add_fake(&inode->i_hash); mark_inode_dirty(inode); out: d_add(dentry, inode); diff --git a/fs/hfs/mdb.c b/fs/hfs/mdb.c index 86428f5..1563d5c 100644 --- a/fs/hfs/mdb.c +++ b/fs/hfs/mdb.c @@ -220,7 +220,7 @@ int hfs_mdb_get(struct super_block *sb) mdb->drLsMod = hfs_mtime(); mark_buffer_dirty(HFS_SB(sb)->mdb_bh); - hfs_buffer_sync(HFS_SB(sb)->mdb_bh); + sync_dirty_buffer(HFS_SB(sb)->mdb_bh); } return 0; @@ -287,7 +287,7 @@ void hfs_mdb_commit(struct super_block *sb) HFS_SB(sb)->alt_mdb->drAtrb |= cpu_to_be16(HFS_SB_ATTRIB_UNMNT); HFS_SB(sb)->alt_mdb->drAtrb &= cpu_to_be16(~HFS_SB_ATTRIB_INCNSTNT); mark_buffer_dirty(HFS_SB(sb)->alt_mdb_bh); - hfs_buffer_sync(HFS_SB(sb)->alt_mdb_bh); + sync_dirty_buffer(HFS_SB(sb)->alt_mdb_bh); } if (test_and_clear_bit(HFS_FLG_BITMAP_DIRTY, &HFS_SB(sb)->flags)) { diff --git a/fs/hfs/super.c b/fs/hfs/super.c index 3325416..6ee1586 100644 --- a/fs/hfs/super.c +++ b/fs/hfs/super.c @@ -382,7 +382,6 @@ static int hfs_fill_super(struct super_block *sb, void *data, int silent) return -ENOMEM; sb->s_fs_info = sbi; - INIT_HLIST_HEAD(&sbi->rsrc_inodes); res = -EINVAL; if (!parse_options((char *)data, sbi)) { diff --git a/fs/hfsplus/dir.c b/fs/hfsplus/dir.c index d236d85..e318bbc 100644 --- a/fs/hfsplus/dir.c +++ b/fs/hfsplus/dir.c @@ -286,7 +286,7 @@ static int hfsplus_link(struct dentry *src_dentry, struct inode *dst_dir, inc_nlink(inode); hfsplus_instantiate(dst_dentry, inode, cnid); - atomic_inc(&inode->i_count); + ihold(inode); inode->i_ctime = CURRENT_TIME_SEC; mark_inode_dirty(inode); sbi->file_count++; diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c index 7844928..8afd7e8 100644 --- a/fs/hfsplus/inode.c +++ b/fs/hfsplus/inode.c @@ -211,7 +211,7 @@ static struct dentry *hfsplus_file_lookup(struct inode *dir, struct dentry *dent * appear hashed, but do not put on any lists. hlist_del() * will work fine and require no locking. */ - inode->i_hash.pprev = &inode->i_hash.next; + hlist_add_fake(&inode->i_hash); mark_inode_dirty(inode); out: diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index a14328d..b14be3f 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -456,6 +456,7 @@ static struct inode *hugetlbfs_get_inode(struct super_block *sb, uid_t uid, inode = new_inode(sb); if (inode) { struct hugetlbfs_inode_info *info; + inode->i_ino = get_next_ino(); inode->i_mode = mode; inode->i_uid = uid; inode->i_gid = gid; @@ -29,7 +29,6 @@ /* * This is needed for the following functions: * - inode_has_buffers - * - invalidate_inode_buffers * - invalidate_bdev * * FIXME: remove all knowledge of the buffer layer from this file @@ -73,8 +72,7 @@ static unsigned int i_hash_shift __read_mostly; * allowing for low-overhead inode sync() operations. */ -LIST_HEAD(inode_in_use); -LIST_HEAD(inode_unused); +static LIST_HEAD(inode_lru); static struct hlist_head *inode_hashtable __read_mostly; /* @@ -104,8 +102,41 @@ static DECLARE_RWSEM(iprune_sem); */ struct inodes_stat_t inodes_stat; +static struct percpu_counter nr_inodes __cacheline_aligned_in_smp; +static struct percpu_counter nr_inodes_unused __cacheline_aligned_in_smp; + static struct kmem_cache *inode_cachep __read_mostly; +static inline int get_nr_inodes(void) +{ + return percpu_counter_sum_positive(&nr_inodes); +} + +static inline int get_nr_inodes_unused(void) +{ + return percpu_counter_sum_positive(&nr_inodes_unused); +} + +int get_nr_dirty_inodes(void) +{ + int nr_dirty = get_nr_inodes() - get_nr_inodes_unused(); + return nr_dirty > 0 ? nr_dirty : 0; + +} + +/* + * Handle nr_inode sysctl + */ +#ifdef CONFIG_SYSCTL +int proc_nr_inodes(ctl_table *table, int write, + void __user *buffer, size_t *lenp, loff_t *ppos) +{ + inodes_stat.nr_inodes = get_nr_inodes(); + inodes_stat.nr_unused = get_nr_inodes_unused(); + return proc_dointvec(table, write, buffer, lenp, ppos); +} +#endif + static void wake_up_inode(struct inode *inode) { /* @@ -193,6 +224,8 @@ int inode_init_always(struct super_block *sb, struct inode *inode) inode->i_fsnotify_mask = 0; #endif + percpu_counter_inc(&nr_inodes); + return 0; out: return -ENOMEM; @@ -233,11 +266,13 @@ void __destroy_inode(struct inode *inode) if (inode->i_default_acl && inode->i_default_acl != ACL_NOT_CACHED) posix_acl_release(inode->i_default_acl); #endif + percpu_counter_dec(&nr_inodes); } EXPORT_SYMBOL(__destroy_inode); -void destroy_inode(struct inode *inode) +static void destroy_inode(struct inode *inode) { + BUG_ON(!list_empty(&inode->i_lru)); __destroy_inode(inode); if (inode->i_sb->s_op->destroy_inode) inode->i_sb->s_op->destroy_inode(inode); @@ -256,6 +291,8 @@ void inode_init_once(struct inode *inode) INIT_HLIST_NODE(&inode->i_hash); INIT_LIST_HEAD(&inode->i_dentry); INIT_LIST_HEAD(&inode->i_devices); + INIT_LIST_HEAD(&inode->i_wb_list); + INIT_LIST_HEAD(&inode->i_lru); INIT_RADIX_TREE(&inode->i_data.page_tree, GFP_ATOMIC); spin_lock_init(&inode->i_data.tree_lock); spin_lock_init(&inode->i_data.i_mmap_lock); @@ -282,14 +319,109 @@ static void init_once(void *foo) */ void __iget(struct inode *inode) { - if (atomic_inc_return(&inode->i_count) != 1) - return; + atomic_inc(&inode->i_count); +} + +/* + * get additional reference to inode; caller must already hold one. + */ +void ihold(struct inode *inode) +{ + WARN_ON(atomic_inc_return(&inode->i_count) < 2); +} +EXPORT_SYMBOL(ihold); + +static void inode_lru_list_add(struct inode *inode) +{ + if (list_empty(&inode->i_lru)) { + list_add(&inode->i_lru, &inode_lru); + percpu_counter_inc(&nr_inodes_unused); + } +} - if (!(inode->i_state & (I_DIRTY|I_SYNC))) - list_move(&inode->i_list, &inode_in_use); - inodes_stat.nr_unused--; +static void inode_lru_list_del(struct inode *inode) +{ + if (!list_empty(&inode->i_lru)) { + list_del_init(&inode->i_lru); + percpu_counter_dec(&nr_inodes_unused); + } +} + +static inline void __inode_sb_list_add(struct inode *inode) +{ + list_add(&inode->i_sb_list, &inode->i_sb->s_inodes); } +/** + * inode_sb_list_add - add inode to the superblock list of inodes + * @inode: inode to add + */ +void inode_sb_list_add(struct inode *inode) +{ + spin_lock(&inode_lock); + __inode_sb_list_add(inode); + spin_unlock(&inode_lock); +} +EXPORT_SYMBOL_GPL(inode_sb_list_add); + +static inline void __inode_sb_list_del(struct inode *inode) +{ + list_del_init(&inode->i_sb_list); +} + +static unsigned long hash(struct super_block *sb, unsigned long hashval) +{ + unsigned long tmp; + + tmp = (hashval * (unsigned long)sb) ^ (GOLDEN_RATIO_PRIME + hashval) / + L1_CACHE_BYTES; + tmp = tmp ^ ((tmp ^ GOLDEN_RATIO_PRIME) >> I_HASHBITS); + return tmp & I_HASHMASK; +} + +/** + * __insert_inode_hash - hash an inode + * @inode: unhashed inode + * @hashval: unsigned long value used to locate this object in the + * inode_hashtable. + * + * Add an inode to the inode hash for this superblock. + */ +void __insert_inode_hash(struct inode *inode, unsigned long hashval) +{ + struct hlist_head *b = inode_hashtable + hash(inode->i_sb, hashval); + + spin_lock(&inode_lock); + hlist_add_head(&inode->i_hash, b); + spin_unlock(&inode_lock); +} +EXPORT_SYMBOL(__insert_inode_hash); + +/** + * __remove_inode_hash - remove an inode from the hash + * @inode: inode to unhash + * + * Remove an inode from the superblock. + */ +static void __remove_inode_hash(struct inode *inode) +{ + hlist_del_init(&inode->i_hash); +} + +/** + * remove_inode_hash - remove an inode from the hash + * @inode: inode to unhash + * + * Remove an inode from the superblock. + */ +void remove_inode_hash(struct inode *inode) +{ + spin_lock(&inode_lock); + hlist_del_init(&inode->i_hash); + spin_unlock(&inode_lock); +} +EXPORT_SYMBOL(remove_inode_hash); + void end_writeback(struct inode *inode) { might_sleep(); @@ -328,101 +460,113 @@ static void evict(struct inode *inode) */ static void dispose_list(struct list_head *head) { - int nr_disposed = 0; - while (!list_empty(head)) { struct inode *inode; - inode = list_first_entry(head, struct inode, i_list); - list_del(&inode->i_list); + inode = list_first_entry(head, struct inode, i_lru); + list_del_init(&inode->i_lru); evict(inode); spin_lock(&inode_lock); - hlist_del_init(&inode->i_hash); - list_del_init(&inode->i_sb_list); + __remove_inode_hash(inode); + __inode_sb_list_del(inode); spin_unlock(&inode_lock); wake_up_inode(inode); destroy_inode(inode); - nr_disposed++; } - spin_lock(&inode_lock); - inodes_stat.nr_inodes -= nr_disposed; - spin_unlock(&inode_lock); } -/* - * Invalidate all inodes for a device. +/** + * evict_inodes - evict all evictable inodes for a superblock + * @sb: superblock to operate on + * + * Make sure that no inodes with zero refcount are retained. This is + * called by superblock shutdown after having MS_ACTIVE flag removed, + * so any inode reaching zero refcount during or after that call will + * be immediately evicted. */ -static int invalidate_list(struct list_head *head, struct list_head *dispose) +void evict_inodes(struct super_block *sb) { - struct list_head *next; - int busy = 0, count = 0; - - next = head->next; - for (;;) { - struct list_head *tmp = next; - struct inode *inode; + struct inode *inode, *next; + LIST_HEAD(dispose); - /* - * We can reschedule here without worrying about the list's - * consistency because the per-sb list of inodes must not - * change during umount anymore, and because iprune_sem keeps - * shrink_icache_memory() away. - */ - cond_resched_lock(&inode_lock); + down_write(&iprune_sem); - next = next->next; - if (tmp == head) - break; - inode = list_entry(tmp, struct inode, i_sb_list); - if (inode->i_state & I_NEW) + spin_lock(&inode_lock); + list_for_each_entry_safe(inode, next, &sb->s_inodes, i_sb_list) { + if (atomic_read(&inode->i_count)) continue; - invalidate_inode_buffers(inode); - if (!atomic_read(&inode->i_count)) { - list_move(&inode->i_list, dispose); - WARN_ON(inode->i_state & I_NEW); - inode->i_state |= I_FREEING; - count++; + + if (inode->i_state & (I_NEW | I_FREEING | I_WILL_FREE)) { + WARN_ON(1); continue; } - busy = 1; + + inode->i_state |= I_FREEING; + + /* + * Move the inode off the IO lists and LRU once I_FREEING is + * set so that it won't get moved back on there if it is dirty. + */ + list_move(&inode->i_lru, &dispose); + list_del_init(&inode->i_wb_list); + if (!(inode->i_state & (I_DIRTY | I_SYNC))) + percpu_counter_dec(&nr_inodes_unused); } - /* only unused inodes may be cached with i_count zero */ - inodes_stat.nr_unused -= count; - return busy; + spin_unlock(&inode_lock); + + dispose_list(&dispose); + up_write(&iprune_sem); } /** - * invalidate_inodes - discard the inodes on a device - * @sb: superblock + * invalidate_inodes - attempt to free all inodes on a superblock + * @sb: superblock to operate on * - * Discard all of the inodes for a given superblock. If the discard - * fails because there are busy inodes then a non zero value is returned. - * If the discard is successful all the inodes have been discarded. + * Attempts to free all inodes for a given superblock. If there were any + * busy inodes return a non-zero value, else zero. */ int invalidate_inodes(struct super_block *sb) { - int busy; - LIST_HEAD(throw_away); + int busy = 0; + struct inode *inode, *next; + LIST_HEAD(dispose); down_write(&iprune_sem); + spin_lock(&inode_lock); - fsnotify_unmount_inodes(&sb->s_inodes); - busy = invalidate_list(&sb->s_inodes, &throw_away); + list_for_each_entry_safe(inode, next, &sb->s_inodes, i_sb_list) { + if (inode->i_state & (I_NEW | I_FREEING | I_WILL_FREE)) + continue; + if (atomic_read(&inode->i_count)) { + busy = 1; + continue; + } + + inode->i_state |= I_FREEING; + + /* + * Move the inode off the IO lists and LRU once I_FREEING is + * set so that it won't get moved back on there if it is dirty. + */ + list_move(&inode->i_lru, &dispose); + list_del_init(&inode->i_wb_list); + if (!(inode->i_state & (I_DIRTY | I_SYNC))) + percpu_counter_dec(&nr_inodes_unused); + } spin_unlock(&inode_lock); - dispose_list(&throw_away); + dispose_list(&dispose); up_write(&iprune_sem); return busy; } -EXPORT_SYMBOL(invalidate_inodes); static int can_unuse(struct inode *inode) { - if (inode->i_state) + if (inode->i_state & ~I_REFERENCED) return 0; if (inode_has_buffers(inode)) return 0; @@ -434,22 +578,24 @@ static int can_unuse(struct inode *inode) } /* - * Scan `goal' inodes on the unused list for freeable ones. They are moved to - * a temporary list and then are freed outside inode_lock by dispose_list(). + * Scan `goal' inodes on the unused list for freeable ones. They are moved to a + * temporary list and then are freed outside inode_lock by dispose_list(). * * Any inodes which are pinned purely because of attached pagecache have their - * pagecache removed. We expect the final iput() on that inode to add it to - * the front of the inode_unused list. So look for it there and if the - * inode is still freeable, proceed. The right inode is found 99.9% of the - * time in testing on a 4-way. + * pagecache removed. If the inode has metadata buffers attached to + * mapping->private_list then try to remove them. * - * If the inode has metadata buffers attached to mapping->private_list then - * try to remove them. + * If the inode has the I_REFERENCED flag set, then it means that it has been + * used recently - the flag is set in iput_final(). When we encounter such an + * inode, clear the flag and move it to the back of the LRU so it gets another + * pass through the LRU before it gets reclaimed. This is necessary because of + * the fact we are doing lazy LRU updates to minimise lock contention so the + * LRU does not have strict ordering. Hence we don't want to reclaim inodes + * with this flag set because they are the inodes that are out of order. */ static void prune_icache(int nr_to_scan) { LIST_HEAD(freeable); - int nr_pruned = 0; int nr_scanned; unsigned long reap = 0; @@ -458,13 +604,26 @@ static void prune_icache(int nr_to_scan) for (nr_scanned = 0; nr_scanned < nr_to_scan; nr_scanned++) { struct inode *inode; - if (list_empty(&inode_unused)) + if (list_empty(&inode_lru)) break; - inode = list_entry(inode_unused.prev, struct inode, i_list); + inode = list_entry(inode_lru.prev, struct inode, i_lru); - if (inode->i_state || atomic_read(&inode->i_count)) { - list_move(&inode->i_list, &inode_unused); + /* + * Referenced or dirty inodes are still in use. Give them + * another pass through the LRU as we canot reclaim them now. + */ + if (atomic_read(&inode->i_count) || + (inode->i_state & ~I_REFERENCED)) { + list_del_init(&inode->i_lru); + percpu_counter_dec(&nr_inodes_unused); + continue; + } + + /* recently referenced inodes get one more pass */ + if (inode->i_state & I_REFERENCED) { + list_move(&inode->i_lru, &inode_lru); + inode->i_state &= ~I_REFERENCED; continue; } if (inode_has_buffers(inode) || inode->i_data.nrpages) { @@ -476,18 +635,23 @@ static void prune_icache(int nr_to_scan) iput(inode); spin_lock(&inode_lock); - if (inode != list_entry(inode_unused.next, - struct inode, i_list)) + if (inode != list_entry(inode_lru.next, + struct inode, i_lru)) continue; /* wrong inode or list_empty */ if (!can_unuse(inode)) continue; } - list_move(&inode->i_list, &freeable); WARN_ON(inode->i_state & I_NEW); inode->i_state |= I_FREEING; - nr_pruned++; + + /* + * Move the inode off the IO lists and LRU once I_FREEING is + * set so that it won't get moved back on there if it is dirty. + */ + list_move(&inode->i_lru, &freeable); + list_del_init(&inode->i_wb_list); + percpu_counter_dec(&nr_inodes_unused); } - inodes_stat.nr_unused -= nr_pruned; if (current_is_kswapd()) __count_vm_events(KSWAPD_INODESTEAL, reap); else @@ -519,7 +683,7 @@ static int shrink_icache_memory(struct shrinker *shrink, int nr, gfp_t gfp_mask) return -1; prune_icache(nr); } - return (inodes_stat.nr_unused / 100) * sysctl_vfs_cache_pressure; + return (get_nr_inodes_unused() / 100) * sysctl_vfs_cache_pressure; } static struct shrinker icache_shrinker = { @@ -530,9 +694,6 @@ static struct shrinker icache_shrinker = { static void __wait_on_freeing_inode(struct inode *inode); /* * Called with the inode lock held. - * NOTE: we are not increasing the inode-refcount, you must call __iget() - * by hand after calling find_inode now! This simplifies iunique and won't - * add any additional branch in the common code. */ static struct inode *find_inode(struct super_block *sb, struct hlist_head *head, @@ -552,9 +713,10 @@ repeat: __wait_on_freeing_inode(inode); goto repeat; } - break; + __iget(inode); + return inode; } - return node ? inode : NULL; + return NULL; } /* @@ -577,53 +739,49 @@ repeat: __wait_on_freeing_inode(inode); goto repeat; } - break; + __iget(inode); + return inode; } - return node ? inode : NULL; -} - -static unsigned long hash(struct super_block *sb, unsigned long hashval) -{ - unsigned long tmp; - - tmp = (hashval * (unsigned long)sb) ^ (GOLDEN_RATIO_PRIME + hashval) / - L1_CACHE_BYTES; - tmp = tmp ^ ((tmp ^ GOLDEN_RATIO_PRIME) >> I_HASHBITS); - return tmp & I_HASHMASK; -} - -static inline void -__inode_add_to_lists(struct super_block *sb, struct hlist_head *head, - struct inode *inode) -{ - inodes_stat.nr_inodes++; - list_add(&inode->i_list, &inode_in_use); - list_add(&inode->i_sb_list, &sb->s_inodes); - if (head) - hlist_add_head(&inode->i_hash, head); + return NULL; } -/** - * inode_add_to_lists - add a new inode to relevant lists - * @sb: superblock inode belongs to - * @inode: inode to mark in use +/* + * Each cpu owns a range of LAST_INO_BATCH numbers. + * 'shared_last_ino' is dirtied only once out of LAST_INO_BATCH allocations, + * to renew the exhausted range. * - * When an inode is allocated it needs to be accounted for, added to the in use - * list, the owning superblock and the inode hash. This needs to be done under - * the inode_lock, so export a function to do this rather than the inode lock - * itself. We calculate the hash list to add to here so it is all internal - * which requires the caller to have already set up the inode number in the - * inode to add. + * This does not significantly increase overflow rate because every CPU can + * consume at most LAST_INO_BATCH-1 unused inode numbers. So there is + * NR_CPUS*(LAST_INO_BATCH-1) wastage. At 4096 and 1024, this is ~0.1% of the + * 2^32 range, and is a worst-case. Even a 50% wastage would only increase + * overflow rate by 2x, which does not seem too significant. + * + * On a 32bit, non LFS stat() call, glibc will generate an EOVERFLOW + * error if st_ino won't fit in target struct field. Use 32bit counter + * here to attempt to avoid that. */ -void inode_add_to_lists(struct super_block *sb, struct inode *inode) +#define LAST_INO_BATCH 1024 +static DEFINE_PER_CPU(unsigned int, last_ino); + +unsigned int get_next_ino(void) { - struct hlist_head *head = inode_hashtable + hash(sb, inode->i_ino); + unsigned int *p = &get_cpu_var(last_ino); + unsigned int res = *p; - spin_lock(&inode_lock); - __inode_add_to_lists(sb, head, inode); - spin_unlock(&inode_lock); +#ifdef CONFIG_SMP + if (unlikely((res & (LAST_INO_BATCH-1)) == 0)) { + static atomic_t shared_last_ino; + int next = atomic_add_return(LAST_INO_BATCH, &shared_last_ino); + + res = next - LAST_INO_BATCH; + } +#endif + + *p = ++res; + put_cpu_var(last_ino); + return res; } -EXPORT_SYMBOL_GPL(inode_add_to_lists); +EXPORT_SYMBOL(get_next_ino); /** * new_inode - obtain an inode @@ -639,12 +797,6 @@ EXPORT_SYMBOL_GPL(inode_add_to_lists); */ struct inode *new_inode(struct super_block *sb) { - /* - * On a 32bit, non LFS stat() call, glibc will generate an EOVERFLOW - * error if st_ino won't fit in target struct field. Use 32bit counter - * here to attempt to avoid that. - */ - static unsigned int last_ino; struct inode *inode; spin_lock_prefetch(&inode_lock); @@ -652,8 +804,7 @@ struct inode *new_inode(struct super_block *sb) inode = alloc_inode(sb); if (inode) { spin_lock(&inode_lock); - __inode_add_to_lists(sb, NULL, inode); - inode->i_ino = ++last_ino; + __inode_sb_list_add(inode); inode->i_state = 0; spin_unlock(&inode_lock); } @@ -664,7 +815,7 @@ EXPORT_SYMBOL(new_inode); void unlock_new_inode(struct inode *inode) { #ifdef CONFIG_DEBUG_LOCK_ALLOC - if (inode->i_mode & S_IFDIR) { + if (S_ISDIR(inode->i_mode)) { struct file_system_type *type = inode->i_sb->s_type; /* Set new key only if filesystem hasn't already changed it */ @@ -721,7 +872,8 @@ static struct inode *get_new_inode(struct super_block *sb, if (set(inode, data)) goto set_failed; - __inode_add_to_lists(sb, head, inode); + hlist_add_head(&inode->i_hash, head); + __inode_sb_list_add(inode); inode->i_state = I_NEW; spin_unlock(&inode_lock); @@ -736,7 +888,6 @@ static struct inode *get_new_inode(struct super_block *sb, * us. Use the old inode instead of the one we just * allocated. */ - __iget(old); spin_unlock(&inode_lock); destroy_inode(inode); inode = old; @@ -768,7 +919,8 @@ static struct inode *get_new_inode_fast(struct super_block *sb, old = find_inode_fast(sb, head, ino); if (!old) { inode->i_ino = ino; - __inode_add_to_lists(sb, head, inode); + hlist_add_head(&inode->i_hash, head); + __inode_sb_list_add(inode); inode->i_state = I_NEW; spin_unlock(&inode_lock); @@ -783,7 +935,6 @@ static struct inode *get_new_inode_fast(struct super_block *sb, * us. Use the old inode instead of the one we just * allocated. */ - __iget(old); spin_unlock(&inode_lock); destroy_inode(inode); inode = old; @@ -792,6 +943,27 @@ static struct inode *get_new_inode_fast(struct super_block *sb, return inode; } +/* + * search the inode cache for a matching inode number. + * If we find one, then the inode number we are trying to + * allocate is not unique and so we should not use it. + * + * Returns 1 if the inode number is unique, 0 if it is not. + */ +static int test_inode_iunique(struct super_block *sb, unsigned long ino) +{ + struct hlist_head *b = inode_hashtable + hash(sb, ino); + struct hlist_node *node; + struct inode *inode; + + hlist_for_each_entry(inode, node, b, i_hash) { + if (inode->i_ino == ino && inode->i_sb == sb) + return 0; + } + + return 1; +} + /** * iunique - get a unique inode number * @sb: superblock @@ -813,19 +985,18 @@ ino_t iunique(struct super_block *sb, ino_t max_reserved) * error if st_ino won't fit in target struct field. Use 32bit counter * here to attempt to avoid that. */ + static DEFINE_SPINLOCK(iunique_lock); static unsigned int counter; - struct inode *inode; - struct hlist_head *head; ino_t res; spin_lock(&inode_lock); + spin_lock(&iunique_lock); do { if (counter <= max_reserved) counter = max_reserved + 1; res = counter++; - head = inode_hashtable + hash(sb, res); - inode = find_inode_fast(sb, head, res); - } while (inode != NULL); + } while (!test_inode_iunique(sb, res)); + spin_unlock(&iunique_lock); spin_unlock(&inode_lock); return res; @@ -877,7 +1048,6 @@ static struct inode *ifind(struct super_block *sb, spin_lock(&inode_lock); inode = find_inode(sb, head, test, data); if (inode) { - __iget(inode); spin_unlock(&inode_lock); if (likely(wait)) wait_on_inode(inode); @@ -910,7 +1080,6 @@ static struct inode *ifind_fast(struct super_block *sb, spin_lock(&inode_lock); inode = find_inode_fast(sb, head, ino); if (inode) { - __iget(inode); spin_unlock(&inode_lock); wait_on_inode(inode); return inode; @@ -1096,7 +1265,7 @@ int insert_inode_locked(struct inode *inode) __iget(old); spin_unlock(&inode_lock); wait_on_inode(old); - if (unlikely(!hlist_unhashed(&old->i_hash))) { + if (unlikely(!inode_unhashed(old))) { iput(old); return -EBUSY; } @@ -1135,7 +1304,7 @@ int insert_inode_locked4(struct inode *inode, unsigned long hashval, __iget(old); spin_unlock(&inode_lock); wait_on_inode(old); - if (unlikely(!hlist_unhashed(&old->i_hash))) { + if (unlikely(!inode_unhashed(old))) { iput(old); return -EBUSY; } @@ -1144,36 +1313,6 @@ int insert_inode_locked4(struct inode *inode, unsigned long hashval, } EXPORT_SYMBOL(insert_inode_locked4); -/** - * __insert_inode_hash - hash an inode - * @inode: unhashed inode - * @hashval: unsigned long value used to locate this object in the - * inode_hashtable. - * - * Add an inode to the inode hash for this superblock. - */ -void __insert_inode_hash(struct inode *inode, unsigned long hashval) -{ - struct hlist_head *head = inode_hashtable + hash(inode->i_sb, hashval); - spin_lock(&inode_lock); - hlist_add_head(&inode->i_hash, head); - spin_unlock(&inode_lock); -} -EXPORT_SYMBOL(__insert_inode_hash); - -/** - * remove_inode_hash - remove an inode from the hash - * @inode: inode to unhash - * - * Remove an inode from the superblock. - */ -void remove_inode_hash(struct inode *inode) -{ - spin_lock(&inode_lock); - hlist_del_init(&inode->i_hash); - spin_unlock(&inode_lock); -} -EXPORT_SYMBOL(remove_inode_hash); int generic_delete_inode(struct inode *inode) { @@ -1188,7 +1327,7 @@ EXPORT_SYMBOL(generic_delete_inode); */ int generic_drop_inode(struct inode *inode) { - return !inode->i_nlink || hlist_unhashed(&inode->i_hash); + return !inode->i_nlink || inode_unhashed(inode); } EXPORT_SYMBOL_GPL(generic_drop_inode); @@ -1214,10 +1353,11 @@ static void iput_final(struct inode *inode) drop = generic_drop_inode(inode); if (!drop) { - if (!(inode->i_state & (I_DIRTY|I_SYNC))) - list_move(&inode->i_list, &inode_unused); - inodes_stat.nr_unused++; if (sb->s_flags & MS_ACTIVE) { + inode->i_state |= I_REFERENCED; + if (!(inode->i_state & (I_DIRTY|I_SYNC))) { + inode_lru_list_add(inode); + } spin_unlock(&inode_lock); return; } @@ -1228,19 +1368,23 @@ static void iput_final(struct inode *inode) spin_lock(&inode_lock); WARN_ON(inode->i_state & I_NEW); inode->i_state &= ~I_WILL_FREE; - inodes_stat.nr_unused--; - hlist_del_init(&inode->i_hash); + __remove_inode_hash(inode); } - list_del_init(&inode->i_list); - list_del_init(&inode->i_sb_list); + WARN_ON(inode->i_state & I_NEW); inode->i_state |= I_FREEING; - inodes_stat.nr_inodes--; + + /* + * Move the inode off the IO lists and LRU once I_FREEING is + * set so that it won't get moved back on there if it is dirty. + */ + inode_lru_list_del(inode); + list_del_init(&inode->i_wb_list); + + __inode_sb_list_del(inode); spin_unlock(&inode_lock); evict(inode); - spin_lock(&inode_lock); - hlist_del_init(&inode->i_hash); - spin_unlock(&inode_lock); + remove_inode_hash(inode); wake_up_inode(inode); BUG_ON(inode->i_state != (I_FREEING | I_CLEAR)); destroy_inode(inode); @@ -1504,6 +1648,8 @@ void __init inode_init(void) SLAB_MEM_SPREAD), init_once); register_shrinker(&icache_shrinker); + percpu_counter_init(&nr_inodes, 0); + percpu_counter_init(&nr_inodes_unused, 0); /* Hash may have been set up in inode_init_early */ if (!hashdist) diff --git a/fs/internal.h b/fs/internal.h index a6910e9..ebad3b9 100644 --- a/fs/internal.h +++ b/fs/internal.h @@ -101,3 +101,10 @@ extern void put_super(struct super_block *sb); struct nameidata; extern struct file *nameidata_to_filp(struct nameidata *); extern void release_open_intent(struct nameidata *); + +/* + * inode.c + */ +extern int get_nr_dirty_inodes(void); +extern int evict_inodes(struct super_block *); +extern int invalidate_inodes(struct super_block *); diff --git a/fs/isofs/inode.c b/fs/isofs/inode.c index 09ff41a..60c2b944 100644 --- a/fs/isofs/inode.c +++ b/fs/isofs/inode.c @@ -962,25 +962,23 @@ static int isofs_statfs (struct dentry *dentry, struct kstatfs *buf) * or getblk() if they are not. Returns the number of blocks inserted * (-ve == error.) */ -int isofs_get_blocks(struct inode *inode, sector_t iblock_s, +int isofs_get_blocks(struct inode *inode, sector_t iblock, struct buffer_head **bh, unsigned long nblocks) { - unsigned long b_off; + unsigned long b_off = iblock; unsigned offset, sect_size; unsigned int firstext; unsigned long nextblk, nextoff; - long iblock = (long)iblock_s; int section, rv, error; struct iso_inode_info *ei = ISOFS_I(inode); error = -EIO; rv = 0; - if (iblock < 0 || iblock != iblock_s) { + if (iblock != b_off) { printk(KERN_DEBUG "%s: block number too large\n", __func__); goto abort; } - b_off = iblock; offset = 0; firstext = ei->i_first_extent; @@ -998,8 +996,9 @@ int isofs_get_blocks(struct inode *inode, sector_t iblock_s, * I/O errors. */ if (b_off > ((inode->i_size + PAGE_CACHE_SIZE - 1) >> ISOFS_BUFFER_BITS(inode))) { - printk(KERN_DEBUG "%s: block >= EOF (%ld, %ld)\n", - __func__, iblock, (unsigned long) inode->i_size); + printk(KERN_DEBUG "%s: block >= EOF (%lu, %llu)\n", + __func__, b_off, + (unsigned long long)inode->i_size); goto abort; } @@ -1025,9 +1024,9 @@ int isofs_get_blocks(struct inode *inode, sector_t iblock_s, if (++section > 100) { printk(KERN_DEBUG "%s: More than 100 file sections ?!?" " aborting...\n", __func__); - printk(KERN_DEBUG "%s: block=%ld firstext=%u sect_size=%u " + printk(KERN_DEBUG "%s: block=%lu firstext=%u sect_size=%u " "nextblk=%lu nextoff=%lu\n", __func__, - iblock, firstext, (unsigned) sect_size, + b_off, firstext, (unsigned) sect_size, nextblk, nextoff); goto abort; } diff --git a/fs/jffs2/dir.c b/fs/jffs2/dir.c index ed78a3cf3..79121aa 100644 --- a/fs/jffs2/dir.c +++ b/fs/jffs2/dir.c @@ -289,7 +289,7 @@ static int jffs2_link (struct dentry *old_dentry, struct inode *dir_i, struct de mutex_unlock(&f->sem); d_instantiate(dentry, old_dentry->d_inode); dir_i->i_mtime = dir_i->i_ctime = ITIME(now); - atomic_inc(&old_dentry->d_inode->i_count); + ihold(old_dentry->d_inode); } return ret; } @@ -864,7 +864,7 @@ static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry, printk(KERN_NOTICE "jffs2_rename(): Link succeeded, unlink failed (err %d). You now have a hard link\n", ret); /* Might as well let the VFS know */ d_instantiate(new_dentry, old_dentry->d_inode); - atomic_inc(&old_dentry->d_inode->i_count); + ihold(old_dentry->d_inode); new_dir_i->i_mtime = new_dir_i->i_ctime = ITIME(now); return ret; } diff --git a/fs/jfs/jfs_imap.c b/fs/jfs/jfs_imap.c index f8332dc..3a09423 100644 --- a/fs/jfs/jfs_imap.c +++ b/fs/jfs/jfs_imap.c @@ -497,7 +497,7 @@ struct inode *diReadSpecial(struct super_block *sb, ino_t inum, int secondary) * appear hashed, but do not put on any lists. hlist_del() * will work fine and require no locking. */ - ip->i_hash.pprev = &ip->i_hash.next; + hlist_add_fake(&ip->i_hash); return (ip); } diff --git a/fs/jfs/jfs_txnmgr.c b/fs/jfs/jfs_txnmgr.c index d945ea7..9466957 100644 --- a/fs/jfs/jfs_txnmgr.c +++ b/fs/jfs/jfs_txnmgr.c @@ -1279,7 +1279,7 @@ int txCommit(tid_t tid, /* transaction identifier */ * lazy commit thread finishes processing */ if (tblk->xflag & COMMIT_DELETE) { - atomic_inc(&tblk->u.ip->i_count); + ihold(tblk->u.ip); /* * Avoid a rare deadlock * diff --git a/fs/jfs/namei.c b/fs/jfs/namei.c index a9cf8e8..231ca4a 100644 --- a/fs/jfs/namei.c +++ b/fs/jfs/namei.c @@ -839,7 +839,7 @@ static int jfs_link(struct dentry *old_dentry, ip->i_ctime = CURRENT_TIME; dir->i_ctime = dir->i_mtime = CURRENT_TIME; mark_inode_dirty(dir); - atomic_inc(&ip->i_count); + ihold(ip); iplist[0] = ip; iplist[1] = dir; @@ -255,7 +255,7 @@ int simple_link(struct dentry *old_dentry, struct inode *dir, struct dentry *den inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME; inc_nlink(inode); - atomic_inc(&inode->i_count); + ihold(inode); dget(dentry); d_instantiate(dentry, inode); return 0; @@ -892,10 +892,6 @@ EXPORT_SYMBOL_GPL(generic_fh_to_parent); */ int generic_file_fsync(struct file *file, int datasync) { - struct writeback_control wbc = { - .sync_mode = WB_SYNC_ALL, - .nr_to_write = 0, /* metadata-only; caller takes care of data */ - }; struct inode *inode = file->f_mapping->host; int err; int ret; @@ -906,7 +902,7 @@ int generic_file_fsync(struct file *file, int datasync) if (datasync && !(inode->i_state & I_DIRTY_DATASYNC)) return ret; - err = sync_inode(inode, &wbc); + err = sync_inode_metadata(inode, 1); if (ret == 0) ret = err; return ret; diff --git a/fs/logfs/dir.c b/fs/logfs/dir.c index 1eb4e89..409dfd6 100644 --- a/fs/logfs/dir.c +++ b/fs/logfs/dir.c @@ -569,7 +569,7 @@ static int logfs_link(struct dentry *old_dentry, struct inode *dir, return -EMLINK; inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME; - atomic_inc(&inode->i_count); + ihold(inode); inode->i_nlink++; mark_inode_dirty_sync(inode); diff --git a/fs/minix/namei.c b/fs/minix/namei.c index f3f3578..c0d35a3 100644 --- a/fs/minix/namei.c +++ b/fs/minix/namei.c @@ -101,7 +101,7 @@ static int minix_link(struct dentry * old_dentry, struct inode * dir, inode->i_ctime = CURRENT_TIME_SEC; inode_inc_link_count(inode); - atomic_inc(&inode->i_count); + ihold(inode); return add_nondir(dentry, inode); } @@ -1121,11 +1121,13 @@ int vfs_path_lookup(struct dentry *dentry, struct vfsmount *mnt, static struct dentry *__lookup_hash(struct qstr *name, struct dentry *base, struct nameidata *nd) { + struct inode *inode = base->d_inode; struct dentry *dentry; - struct inode *inode; int err; - inode = base->d_inode; + err = exec_permission(inode); + if (err) + return ERR_PTR(err); /* * See if the low-level filesystem might want @@ -1161,11 +1163,6 @@ out: */ static struct dentry *lookup_hash(struct nameidata *nd) { - int err; - - err = exec_permission(nd->path.dentry->d_inode); - if (err) - return ERR_PTR(err); return __lookup_hash(&nd->last, nd->path.dentry, nd); } @@ -1213,9 +1210,6 @@ struct dentry *lookup_one_len(const char *name, struct dentry *base, int len) if (err) return ERR_PTR(err); - err = exec_permission(base->d_inode); - if (err) - return ERR_PTR(err); return __lookup_hash(&this, base, NULL); } @@ -2291,7 +2285,7 @@ static long do_unlinkat(int dfd, const char __user *pathname) goto slashes; inode = dentry->d_inode; if (inode) - atomic_inc(&inode->i_count); + ihold(inode); error = mnt_want_write(nd.path.mnt); if (error) goto exit2; diff --git a/fs/namespace.c b/fs/namespace.c index 7ca5182..8a415c9 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -595,7 +595,7 @@ static struct vfsmount *clone_mnt(struct vfsmount *old, struct dentry *root, goto out_free; } - mnt->mnt_flags = old->mnt_flags; + mnt->mnt_flags = old->mnt_flags & ~MNT_WRITE_HOLD; atomic_inc(&sb->s_active); mnt->mnt_sb = sb; mnt->mnt_root = dget(root); diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 257e405..07ac384 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -1801,7 +1801,7 @@ nfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry) d_drop(dentry); error = NFS_PROTO(dir)->link(inode, dir, &dentry->d_name); if (error == 0) { - atomic_inc(&inode->i_count); + ihold(inode); d_add(dentry, inode); } return error; diff --git a/fs/nfs/getroot.c b/fs/nfs/getroot.c index a70e446..ac7b814 100644 --- a/fs/nfs/getroot.c +++ b/fs/nfs/getroot.c @@ -54,8 +54,7 @@ static int nfs_superblock_set_dummy_root(struct super_block *sb, struct inode *i iput(inode); return -ENOMEM; } - /* Circumvent igrab(): we know the inode is not being freed */ - atomic_inc(&inode->i_count); + ihold(inode); /* * Ensure that this dentry is invisible to d_find_alias(). * Otherwise, it may be spliced into the tree by diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index 661a6cf..184938f 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -281,23 +281,13 @@ commit_metadata(struct svc_fh *fhp) { struct inode *inode = fhp->fh_dentry->d_inode; const struct export_operations *export_ops = inode->i_sb->s_export_op; - int error = 0; if (!EX_ISSYNC(fhp->fh_export)) return 0; - if (export_ops->commit_metadata) { - error = export_ops->commit_metadata(inode); - } else { - struct writeback_control wbc = { - .sync_mode = WB_SYNC_ALL, - .nr_to_write = 0, /* metadata only */ - }; - - error = sync_inode(inode, &wbc); - } - - return error; + if (export_ops->commit_metadata) + return export_ops->commit_metadata(inode); + return sync_inode_metadata(inode, 1); } /* diff --git a/fs/nilfs2/namei.c b/fs/nilfs2/namei.c index 185d160..6e9557e 100644 --- a/fs/nilfs2/namei.c +++ b/fs/nilfs2/namei.c @@ -207,7 +207,7 @@ static int nilfs_link(struct dentry *old_dentry, struct inode *dir, inode->i_ctime = CURRENT_TIME; inode_inc_link_count(inode); - atomic_inc(&inode->i_count); + ihold(inode); err = nilfs_add_nondir(dentry, inode); if (!err) diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c index 3680242..4498a20 100644 --- a/fs/notify/fsnotify.c +++ b/fs/notify/fsnotify.c @@ -88,8 +88,6 @@ void __fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask) { struct dentry *parent; struct inode *p_inode; - bool send = false; - bool should_update_children = false; if (!dentry) dentry = path->dentry; @@ -97,29 +95,12 @@ void __fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask) if (!(dentry->d_flags & DCACHE_FSNOTIFY_PARENT_WATCHED)) return; - spin_lock(&dentry->d_lock); - parent = dentry->d_parent; + parent = dget_parent(dentry); p_inode = parent->d_inode; - if (fsnotify_inode_watches_children(p_inode)) { - if (p_inode->i_fsnotify_mask & mask) { - dget(parent); - send = true; - } - } else { - /* - * The parent doesn't care about events on it's children but - * at least one child thought it did. We need to run all the - * children and update their d_flags to let them know p_inode - * doesn't care about them any more. - */ - dget(parent); - should_update_children = true; - } - - spin_unlock(&dentry->d_lock); - - if (send) { + if (unlikely(!fsnotify_inode_watches_children(p_inode))) + __fsnotify_update_child_dentry_flags(p_inode); + else if (p_inode->i_fsnotify_mask & mask) { /* we are notifying a parent so come up with the new mask which * specifies these are events which came from a child. */ mask |= FS_EVENT_ON_CHILD; @@ -130,13 +111,9 @@ void __fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask) else fsnotify(p_inode, mask, dentry->d_inode, FSNOTIFY_EVENT_INODE, dentry->d_name.name, 0); - dput(parent); } - if (unlikely(should_update_children)) { - __fsnotify_update_child_dentry_flags(p_inode); - dput(parent); - } + dput(parent); } EXPORT_SYMBOL_GPL(__fsnotify_parent); diff --git a/fs/notify/inode_mark.c b/fs/notify/inode_mark.c index 33297c0..21ed106 100644 --- a/fs/notify/inode_mark.c +++ b/fs/notify/inode_mark.c @@ -240,6 +240,7 @@ void fsnotify_unmount_inodes(struct list_head *list) { struct inode *inode, *next_i, *need_iput = NULL; + spin_lock(&inode_lock); list_for_each_entry_safe(inode, next_i, list, i_sb_list) { struct inode *need_iput_tmp; @@ -297,4 +298,5 @@ void fsnotify_unmount_inodes(struct list_head *list) spin_lock(&inode_lock); } + spin_unlock(&inode_lock); } diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c index 19c5180..d3fbe57 100644 --- a/fs/ntfs/super.c +++ b/fs/ntfs/super.c @@ -2911,8 +2911,8 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent) goto unl_upcase_iput_tmp_ino_err_out_now; } if ((sb->s_root = d_alloc_root(vol->root_ino))) { - /* We increment i_count simulating an ntfs_iget(). */ - atomic_inc(&vol->root_ino->i_count); + /* We grab a reference, simulating an ntfs_iget(). */ + ihold(vol->root_ino); ntfs_debug("Exiting, status successful."); /* Release the default upcase if it has no users. */ mutex_lock(&ntfs_lock); @@ -3021,21 +3021,6 @@ iput_tmp_ino_err_out_now: if (vol->mft_ino && vol->mft_ino != tmp_ino) iput(vol->mft_ino); vol->mft_ino = NULL; - /* - * This is needed to get ntfs_clear_extent_inode() called for each - * inode we have ever called ntfs_iget()/iput() on, otherwise we A) - * leak resources and B) a subsequent mount fails automatically due to - * ntfs_iget() never calling down into our ntfs_read_locked_inode() - * method again... FIXME: Do we need to do this twice now because of - * attribute inodes? I think not, so leave as is for now... (AIA) - */ - if (invalidate_inodes(sb)) { - ntfs_error(sb, "Busy inodes left. This is most likely a NTFS " - "driver bug."); - /* Copied from fs/super.c. I just love this message. (-; */ - printk("NTFS: Busy inodes after umount. Self-destruct in 5 " - "seconds. Have a nice day...\n"); - } /* Errors at this stage are irrelevant. */ err_out_now: sb->s_fs_info = NULL; diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c index 5cfeee1..f1e962c 100644 --- a/fs/ocfs2/aops.c +++ b/fs/ocfs2/aops.c @@ -165,7 +165,7 @@ int ocfs2_get_block(struct inode *inode, sector_t iblock, * ocfs2 never allocates in this function - the only time we * need to use BH_New is when we're extending i_size on a file * system which doesn't support holes, in which case BH_New - * allows block_prepare_write() to zero. + * allows __block_write_begin() to zero. * * If we see this on a sparse file system, then a truncate has * raced us and removed the cluster. In this case, we clear @@ -407,21 +407,6 @@ static int ocfs2_writepage(struct page *page, struct writeback_control *wbc) return ret; } -/* - * This is called from ocfs2_write_zero_page() which has handled it's - * own cluster locking and has ensured allocation exists for those - * blocks to be written. - */ -int ocfs2_prepare_write_nolock(struct inode *inode, struct page *page, - unsigned from, unsigned to) -{ - int ret; - - ret = block_prepare_write(page, from, to, ocfs2_get_block); - - return ret; -} - /* Taken from ext3. We don't necessarily need the full blown * functionality yet, but IMHO it's better to cut and paste the whole * thing so we can avoid introducing our own bugs (and easily pick up @@ -732,7 +717,7 @@ static int ocfs2_should_read_blk(struct inode *inode, struct page *page, } /* - * Some of this taken from block_prepare_write(). We already have our + * Some of this taken from __block_write_begin(). We already have our * mapping by now though, and the entire write will be allocating or * it won't, so not much need to use BH_New. * diff --git a/fs/ocfs2/aops.h b/fs/ocfs2/aops.h index 7606f66..76bfdfd 100644 --- a/fs/ocfs2/aops.h +++ b/fs/ocfs2/aops.h @@ -22,9 +22,6 @@ #ifndef OCFS2_AOPS_H #define OCFS2_AOPS_H -int ocfs2_prepare_write_nolock(struct inode *inode, struct page *page, - unsigned from, unsigned to); - handle_t *ocfs2_start_walk_page_trans(struct inode *inode, struct page *page, unsigned from, diff --git a/fs/ocfs2/dlmfs/dlmfs.c b/fs/ocfs2/dlmfs/dlmfs.c index a7ebd9d..75e115f 100644 --- a/fs/ocfs2/dlmfs/dlmfs.c +++ b/fs/ocfs2/dlmfs/dlmfs.c @@ -400,6 +400,7 @@ static struct inode *dlmfs_get_root_inode(struct super_block *sb) if (inode) { ip = DLMFS_I(inode); + inode->i_ino = get_next_ino(); inode->i_mode = mode; inode->i_uid = current_fsuid(); inode->i_gid = current_fsgid(); @@ -425,6 +426,7 @@ static struct inode *dlmfs_get_inode(struct inode *parent, if (!inode) return NULL; + inode->i_ino = get_next_ino(); inode->i_mode = mode; inode->i_uid = current_fsuid(); inode->i_gid = current_fsgid(); diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c index 1ca6867..77b4c04 100644 --- a/fs/ocfs2/file.c +++ b/fs/ocfs2/file.c @@ -796,13 +796,12 @@ static int ocfs2_write_zero_page(struct inode *inode, u64 abs_from, block_end = block_start + (1 << inode->i_blkbits); /* - * block_start is block-aligned. Bump it by one to - * force ocfs2_{prepare,commit}_write() to zero the + * block_start is block-aligned. Bump it by one to force + * __block_write_begin and block_commit_write to zero the * whole block. */ - ret = ocfs2_prepare_write_nolock(inode, page, - block_start + 1, - block_start + 1); + ret = __block_write_begin(page, block_start + 1, 0, + ocfs2_get_block); if (ret < 0) { mlog_errno(ret); goto out_unlock; diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c index e7bde21..ff5744e 100644 --- a/fs/ocfs2/namei.c +++ b/fs/ocfs2/namei.c @@ -742,7 +742,7 @@ static int ocfs2_link(struct dentry *old_dentry, goto out_commit; } - atomic_inc(&inode->i_count); + ihold(inode); dentry->d_op = &ocfs2_dentry_ops; d_instantiate(dentry, inode); @@ -954,6 +954,8 @@ static struct inode * get_pipe_inode(void) if (!inode) goto fail_inode; + inode->i_ino = get_next_ino(); + pipe = alloc_pipe_info(inode); if (!pipe) goto fail_iput; diff --git a/fs/proc/base.c b/fs/proc/base.c index 53dc8ad..9b094c1 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -771,6 +771,8 @@ static const struct file_operations proc_single_file_operations = { static int mem_open(struct inode* inode, struct file* file) { file->private_data = (void*)((long)current->self_exec_id); + /* OK to pass negative loff_t, we can catch out-of-range */ + file->f_mode |= FMODE_UNSIGNED_OFFSET; return 0; } @@ -1646,6 +1648,7 @@ static struct inode *proc_pid_make_inode(struct super_block * sb, struct task_st /* Common stuff */ ei = PROC_I(inode); + inode->i_ino = get_next_ino(); inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; inode->i_op = &proc_def_inode_operations; @@ -2592,6 +2595,7 @@ static struct dentry *proc_base_instantiate(struct inode *dir, /* Initialize the inode */ ei = PROC_I(inode); + inode->i_ino = get_next_ino(); inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; /* diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c index 2fc5255..b652cb0 100644 --- a/fs/proc/proc_sysctl.c +++ b/fs/proc/proc_sysctl.c @@ -23,6 +23,8 @@ static struct inode *proc_sys_make_inode(struct super_block *sb, if (!inode) goto out; + inode->i_ino = get_next_ino(); + sysctl_head_get(head); ei = PROC_I(inode); ei->sysctl = head; diff --git a/fs/ramfs/inode.c b/fs/ramfs/inode.c index a5ebae7..67fadb1 100644 --- a/fs/ramfs/inode.c +++ b/fs/ramfs/inode.c @@ -58,6 +58,7 @@ struct inode *ramfs_get_inode(struct super_block *sb, struct inode * inode = new_inode(sb); if (inode) { + inode->i_ino = get_next_ino(); inode_init_owner(inode, dir, mode); inode->i_mapping->a_ops = &ramfs_aops; inode->i_mapping->backing_dev_info = &ramfs_backing_dev_info; diff --git a/fs/read_write.c b/fs/read_write.c index e757ef2..9cd9d14 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -31,6 +31,20 @@ const struct file_operations generic_ro_fops = { EXPORT_SYMBOL(generic_ro_fops); +static int +__negative_fpos_check(struct file *file, loff_t pos, size_t count) +{ + /* + * pos or pos+count is negative here, check overflow. + * too big "count" will be caught in rw_verify_area(). + */ + if ((pos < 0) && (pos + count < pos)) + return -EOVERFLOW; + if (file->f_mode & FMODE_UNSIGNED_OFFSET) + return 0; + return -EINVAL; +} + /** * generic_file_llseek_unlocked - lockless generic llseek implementation * @file: file structure to seek on @@ -62,7 +76,9 @@ generic_file_llseek_unlocked(struct file *file, loff_t offset, int origin) break; } - if (offset < 0 || offset > inode->i_sb->s_maxbytes) + if (offset < 0 && __negative_fpos_check(file, offset, 0)) + return -EINVAL; + if (offset > inode->i_sb->s_maxbytes) return -EINVAL; /* Special lock needed here? */ @@ -137,7 +153,7 @@ loff_t default_llseek(struct file *file, loff_t offset, int origin) offset += file->f_pos; } retval = -EINVAL; - if (offset >= 0) { + if (offset >= 0 || !__negative_fpos_check(file, offset, 0)) { if (offset != file->f_pos) { file->f_pos = offset; file->f_version = 0; @@ -221,6 +237,7 @@ bad: } #endif + /* * rw_verify_area doesn't like huge counts. We limit * them to something that fits in "int" so that others @@ -238,8 +255,11 @@ int rw_verify_area(int read_write, struct file *file, loff_t *ppos, size_t count if (unlikely((ssize_t) count < 0)) return retval; pos = *ppos; - if (unlikely((pos < 0) || (loff_t) (pos + count) < 0)) - return retval; + if (unlikely((pos < 0) || (loff_t) (pos + count) < 0)) { + retval = __negative_fpos_check(file, pos, count); + if (retval) + return retval; + } if (unlikely(inode->i_flock && mandatory_lock(inode))) { retval = locks_mandatory_area( diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c index c1f9389..41656d4 100644 --- a/fs/reiserfs/inode.c +++ b/fs/reiserfs/inode.c @@ -22,8 +22,6 @@ int reiserfs_commit_write(struct file *f, struct page *page, unsigned from, unsigned to); -int reiserfs_prepare_write(struct file *f, struct page *page, - unsigned from, unsigned to); void reiserfs_evict_inode(struct inode *inode) { @@ -165,7 +163,7 @@ inline void make_le_item_head(struct item_head *ih, const struct cpu_key *key, ** but tail is still sitting in a direct item, and we can't write to ** it. So, look through this page, and check all the mapped buffers ** to make sure they have valid block numbers. Any that don't need -** to be unmapped, so that block_prepare_write will correctly call +** to be unmapped, so that __block_write_begin will correctly call ** reiserfs_get_block to convert the tail into an unformatted node */ static inline void fix_tail_page_for_writing(struct page *page) @@ -439,13 +437,13 @@ static int reiserfs_bmap(struct inode *inode, sector_t block, } /* special version of get_block that is only used by grab_tail_page right -** now. It is sent to block_prepare_write, and when you try to get a +** now. It is sent to __block_write_begin, and when you try to get a ** block past the end of the file (or a block from a hole) it returns -** -ENOENT instead of a valid buffer. block_prepare_write expects to +** -ENOENT instead of a valid buffer. __block_write_begin expects to ** be able to do i/o on the buffers returned, unless an error value ** is also returned. ** -** So, this allows block_prepare_write to be used for reading a single block +** So, this allows __block_write_begin to be used for reading a single block ** in a page. Where it does not produce a valid page for holes, or past the ** end of the file. This turns out to be exactly what we need for reading ** tails for conversion. @@ -558,11 +556,12 @@ static int convert_tail_for_hole(struct inode *inode, ** ** We must fix the tail page for writing because it might have buffers ** that are mapped, but have a block number of 0. This indicates tail - ** data that has been read directly into the page, and block_prepare_write - ** won't trigger a get_block in this case. + ** data that has been read directly into the page, and + ** __block_write_begin won't trigger a get_block in this case. */ fix_tail_page_for_writing(tail_page); - retval = reiserfs_prepare_write(NULL, tail_page, tail_start, tail_end); + retval = __reiserfs_write_begin(tail_page, tail_start, + tail_end - tail_start); if (retval) goto unlock; @@ -2033,7 +2032,7 @@ static int grab_tail_page(struct inode *inode, /* start within the page of the last block in the file */ start = (offset / blocksize) * blocksize; - error = block_prepare_write(page, start, offset, + error = __block_write_begin(page, start, offset - start, reiserfs_get_block_create_0); if (error) goto unlock; @@ -2628,8 +2627,7 @@ static int reiserfs_write_begin(struct file *file, return ret; } -int reiserfs_prepare_write(struct file *f, struct page *page, - unsigned from, unsigned to) +int __reiserfs_write_begin(struct page *page, unsigned from, unsigned len) { struct inode *inode = page->mapping->host; int ret; @@ -2650,7 +2648,7 @@ int reiserfs_prepare_write(struct file *f, struct page *page, th->t_refcount++; } - ret = block_prepare_write(page, from, to, reiserfs_get_block); + ret = __block_write_begin(page, from, len, reiserfs_get_block); if (ret && reiserfs_transaction_running(inode->i_sb)) { struct reiserfs_transaction_handle *th = current->journal_info; /* this gets a little ugly. If reiserfs_get_block returned an diff --git a/fs/reiserfs/ioctl.c b/fs/reiserfs/ioctl.c index 5cbb81e..adf22b4 100644 --- a/fs/reiserfs/ioctl.c +++ b/fs/reiserfs/ioctl.c @@ -160,8 +160,6 @@ long reiserfs_compat_ioctl(struct file *file, unsigned int cmd, int reiserfs_commit_write(struct file *f, struct page *page, unsigned from, unsigned to); -int reiserfs_prepare_write(struct file *f, struct page *page, - unsigned from, unsigned to); /* ** reiserfs_unpack ** Function try to convert tail from direct item into indirect. @@ -200,7 +198,7 @@ int reiserfs_unpack(struct inode *inode, struct file *filp) } /* we unpack by finding the page with the tail, and calling - ** reiserfs_prepare_write on that page. This will force a + ** __reiserfs_write_begin on that page. This will force a ** reiserfs_get_block to unpack the tail for us. */ index = inode->i_size >> PAGE_CACHE_SHIFT; @@ -210,7 +208,7 @@ int reiserfs_unpack(struct inode *inode, struct file *filp) if (!page) { goto out; } - retval = reiserfs_prepare_write(NULL, page, write_from, write_from); + retval = __reiserfs_write_begin(page, write_from, 0); if (retval) goto out_unlock; diff --git a/fs/reiserfs/namei.c b/fs/reiserfs/namei.c index ee78d4a..ba5f51e 100644 --- a/fs/reiserfs/namei.c +++ b/fs/reiserfs/namei.c @@ -1156,7 +1156,7 @@ static int reiserfs_link(struct dentry *old_dentry, struct inode *dir, inode->i_ctime = CURRENT_TIME_SEC; reiserfs_update_sd(&th, inode); - atomic_inc(&inode->i_count); + ihold(inode); d_instantiate(dentry, inode); retval = journal_end(&th, dir->i_sb, jbegin_count); reiserfs_write_unlock(dir->i_sb); diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c index 8c4cf27..5d04a78 100644 --- a/fs/reiserfs/xattr.c +++ b/fs/reiserfs/xattr.c @@ -418,13 +418,11 @@ static inline __u32 xattr_hash(const char *msg, int len) int reiserfs_commit_write(struct file *f, struct page *page, unsigned from, unsigned to); -int reiserfs_prepare_write(struct file *f, struct page *page, - unsigned from, unsigned to); static void update_ctime(struct inode *inode) { struct timespec now = current_fs_time(inode->i_sb); - if (hlist_unhashed(&inode->i_hash) || !inode->i_nlink || + if (inode_unhashed(inode) || !inode->i_nlink || timespec_equal(&inode->i_ctime, &now)) return; @@ -532,8 +530,7 @@ reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *th, rxh->h_hash = cpu_to_le32(xahash); } - err = reiserfs_prepare_write(NULL, page, page_offset, - page_offset + chunk + skip); + err = __reiserfs_write_begin(page, page_offset, chunk + skip); if (!err) { if (buffer) memcpy(data + skip, buffer + buffer_pos, chunk); diff --git a/fs/seq_file.c b/fs/seq_file.c index 0e7cb13..05d6b0e 100644 --- a/fs/seq_file.c +++ b/fs/seq_file.c @@ -462,9 +462,7 @@ int seq_path_root(struct seq_file *m, struct path *path, struct path *root, if (size) { char *p; - spin_lock(&dcache_lock); p = __d_path(path, root, buf, size); - spin_unlock(&dcache_lock); res = PTR_ERR(p); if (!IS_ERR(p)) { char *end = mangle_path(buf, p, esc); diff --git a/fs/smbfs/dir.c b/fs/smbfs/dir.c index 00a70ca..f678d42 100644 --- a/fs/smbfs/dir.c +++ b/fs/smbfs/dir.c @@ -406,21 +406,15 @@ void smb_renew_times(struct dentry * dentry) { dget(dentry); - spin_lock(&dentry->d_lock); - for (;;) { - struct dentry *parent; + dentry->d_time = jiffies; - dentry->d_time = jiffies; - if (IS_ROOT(dentry)) - break; - parent = dentry->d_parent; - dget(parent); - spin_unlock(&dentry->d_lock); + while (!IS_ROOT(dentry)) { + struct dentry *parent = dget_parent(dentry); dput(dentry); dentry = parent; - spin_lock(&dentry->d_lock); + + dentry->d_time = jiffies; } - spin_unlock(&dentry->d_lock); dput(dentry); } diff --git a/fs/smbfs/inode.c b/fs/smbfs/inode.c index 8fc5e50..f6e9ee5 100644 --- a/fs/smbfs/inode.c +++ b/fs/smbfs/inode.c @@ -229,7 +229,6 @@ smb_invalidate_inodes(struct smb_sb_info *server) { VERBOSE("\n"); shrink_dcache_sb(SB_of(server)); - invalidate_inodes(SB_of(server)); } /* diff --git a/fs/smbfs/proc.c b/fs/smbfs/proc.c index 71c29b6..3dcf638 100644 --- a/fs/smbfs/proc.c +++ b/fs/smbfs/proc.c @@ -332,16 +332,15 @@ static int smb_build_path(struct smb_sb_info *server, unsigned char *buf, * and store it in reversed order [see reverse_string()] */ dget(entry); - spin_lock(&entry->d_lock); while (!IS_ROOT(entry)) { struct dentry *parent; if (maxlen < (3<<unicode)) { - spin_unlock(&entry->d_lock); dput(entry); return -ENAMETOOLONG; } + spin_lock(&entry->d_lock); len = server->ops->convert(path, maxlen-2, entry->d_name.name, entry->d_name.len, server->local_nls, server->remote_nls); @@ -359,15 +358,12 @@ static int smb_build_path(struct smb_sb_info *server, unsigned char *buf, } *path++ = '\\'; maxlen -= len+1; - - parent = entry->d_parent; - dget(parent); spin_unlock(&entry->d_lock); + + parent = dget_parent(entry); dput(entry); entry = parent; - spin_lock(&entry->d_lock); } - spin_unlock(&entry->d_lock); dput(entry); reverse_string(buf, path-buf); @@ -273,14 +273,14 @@ void generic_shutdown_super(struct super_block *sb) get_fs_excl(); sb->s_flags &= ~MS_ACTIVE; - /* bad name - it should be evict_inodes() */ - invalidate_inodes(sb); + fsnotify_unmount_inodes(&sb->s_inodes); + + evict_inodes(sb); if (sop->put_super) sop->put_super(sb); - /* Forget any remaining inodes */ - if (invalidate_inodes(sb)) { + if (!list_empty(&sb->s_inodes)) { printk("VFS: Busy inodes after unmount of %s. " "Self-destruct in 5 seconds. Have a nice day...\n", sb->s_id); diff --git a/fs/sysv/namei.c b/fs/sysv/namei.c index 33e047b..11e7f7d 100644 --- a/fs/sysv/namei.c +++ b/fs/sysv/namei.c @@ -126,7 +126,7 @@ static int sysv_link(struct dentry * old_dentry, struct inode * dir, inode->i_ctime = CURRENT_TIME_SEC; inode_inc_link_count(inode); - atomic_inc(&inode->i_count); + ihold(inode); return add_nondir(dentry, inode); } diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c index 87ebcce..14f64b6 100644 --- a/fs/ubifs/dir.c +++ b/fs/ubifs/dir.c @@ -550,7 +550,7 @@ static int ubifs_link(struct dentry *old_dentry, struct inode *dir, lock_2_inodes(dir, inode); inc_nlink(inode); - atomic_inc(&inode->i_count); + ihold(inode); inode->i_ctime = ubifs_current_time(inode); dir->i_size += sz_change; dir_ui->ui_size = dir->i_size; diff --git a/fs/udf/namei.c b/fs/udf/namei.c index bf5fc67..6d8dc02 100644 --- a/fs/udf/namei.c +++ b/fs/udf/namei.c @@ -1101,7 +1101,7 @@ static int udf_link(struct dentry *old_dentry, struct inode *dir, inc_nlink(inode); inode->i_ctime = current_fs_time(inode->i_sb); mark_inode_dirty(inode); - atomic_inc(&inode->i_count); + ihold(inode); d_instantiate(dentry, inode); unlock_kernel(); diff --git a/fs/ufs/namei.c b/fs/ufs/namei.c index b056f02..12f39b9 100644 --- a/fs/ufs/namei.c +++ b/fs/ufs/namei.c @@ -180,7 +180,7 @@ static int ufs_link (struct dentry * old_dentry, struct inode * dir, inode->i_ctime = CURRENT_TIME_SEC; inode_inc_link_count(inode); - atomic_inc(&inode->i_count); + ihold(inode); error = ufs_add_nondir(dentry, inode); unlock_kernel(); diff --git a/fs/xfs/linux-2.6/xfs_buf.c b/fs/xfs/linux-2.6/xfs_buf.c index ba53128..63fd2c0 100644 --- a/fs/xfs/linux-2.6/xfs_buf.c +++ b/fs/xfs/linux-2.6/xfs_buf.c @@ -1580,6 +1580,7 @@ xfs_mapping_buftarg( XFS_BUFTARG_NAME(btp)); return ENOMEM; } + inode->i_ino = get_next_ino(); inode->i_mode = S_IFBLK; inode->i_bdev = bdev; inode->i_rdev = bdev->bd_dev; diff --git a/fs/xfs/linux-2.6/xfs_iops.c b/fs/xfs/linux-2.6/xfs_iops.c index ec858e0..96107ef 100644 --- a/fs/xfs/linux-2.6/xfs_iops.c +++ b/fs/xfs/linux-2.6/xfs_iops.c @@ -317,7 +317,7 @@ xfs_vn_link( if (unlikely(error)) return -error; - atomic_inc(&inode->i_count); + ihold(inode); d_instantiate(dentry, inode); return 0; } @@ -760,7 +760,9 @@ xfs_setup_inode( inode->i_ino = ip->i_ino; inode->i_state = I_NEW; - inode_add_to_lists(ip->i_mount->m_super, inode); + + inode_sb_list_add(inode); + insert_inode_hash(inode); inode->i_mode = ip->i_d.di_mode; inode->i_nlink = ip->i_d.di_nlink; diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c index ab31ce5..cf80878 100644 --- a/fs/xfs/linux-2.6/xfs_super.c +++ b/fs/xfs/linux-2.6/xfs_super.c @@ -576,7 +576,7 @@ xfs_max_file_offset( /* Figure out maximum filesize, on Linux this can depend on * the filesystem blocksize (on 32 bit platforms). - * __block_prepare_write does this in an [unsigned] long... + * __block_write_begin does this in an [unsigned] long... * page->index << (PAGE_CACHE_SHIFT - bbits) * So, for page sized blocks (4K on 32 bit platforms), * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h index fac5229..fb2ca2e 100644 --- a/fs/xfs/xfs_inode.h +++ b/fs/xfs/xfs_inode.h @@ -500,7 +500,7 @@ void xfs_mark_inode_dirty_sync(xfs_inode_t *); #define IHOLD(ip) \ do { \ ASSERT(atomic_read(&VFS_I(ip)->i_count) > 0) ; \ - atomic_inc(&(VFS_I(ip)->i_count)); \ + ihold(VFS_I(ip)); \ trace_xfs_ihold(ip, _THIS_IP_); \ } while (0) diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h index dd1b25b..68d1fe7 100644 --- a/include/linux/buffer_head.h +++ b/include/linux/buffer_head.h @@ -212,7 +212,6 @@ int generic_write_end(struct file *, struct address_space *, loff_t, unsigned, unsigned, struct page *, void *); void page_zero_new_buffers(struct page *page, unsigned from, unsigned to); -int block_prepare_write(struct page*, unsigned, unsigned, get_block_t*); int cont_write_begin(struct file *, struct address_space *, loff_t, unsigned, unsigned, struct page **, void **, get_block_t *, loff_t *); diff --git a/include/linux/fs.h b/include/linux/fs.h index 4658777..240eb1d 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -92,6 +92,9 @@ struct inodes_stat_t { /* Expect random access pattern */ #define FMODE_RANDOM ((__force fmode_t)0x1000) +/* File is huge (eg. /dev/kmem): treat loff_t as unsigned */ +#define FMODE_UNSIGNED_OFFSET ((__force fmode_t)0x2000) + /* File was opened by fanotify and shouldn't generate fanotify events */ #define FMODE_NONOTIFY ((__force fmode_t)0x1000000) @@ -722,7 +725,8 @@ struct posix_acl; struct inode { struct hlist_node i_hash; - struct list_head i_list; /* backing dev IO list */ + struct list_head i_wb_list; /* backing dev IO list */ + struct list_head i_lru; /* inode LRU list */ struct list_head i_sb_list; struct list_head i_dentry; unsigned long i_ino; @@ -789,6 +793,11 @@ struct inode { void *i_private; /* fs or device private pointer */ }; +static inline int inode_unhashed(struct inode *inode) +{ + return hlist_unhashed(&inode->i_hash); +} + /* * inode->i_mutex nesting subclasses for the lock validator: * @@ -1639,16 +1648,17 @@ struct super_operations { * * Q: What is the difference between I_WILL_FREE and I_FREEING? */ -#define I_DIRTY_SYNC 1 -#define I_DIRTY_DATASYNC 2 -#define I_DIRTY_PAGES 4 +#define I_DIRTY_SYNC (1 << 0) +#define I_DIRTY_DATASYNC (1 << 1) +#define I_DIRTY_PAGES (1 << 2) #define __I_NEW 3 #define I_NEW (1 << __I_NEW) -#define I_WILL_FREE 16 -#define I_FREEING 32 -#define I_CLEAR 64 +#define I_WILL_FREE (1 << 4) +#define I_FREEING (1 << 5) +#define I_CLEAR (1 << 6) #define __I_SYNC 7 #define I_SYNC (1 << __I_SYNC) +#define I_REFERENCED (1 << 8) #define I_DIRTY (I_DIRTY_SYNC | I_DIRTY_DATASYNC | I_DIRTY_PAGES) @@ -1740,6 +1750,7 @@ static inline void file_accessed(struct file *file) } int sync_inode(struct inode *inode, struct writeback_control *wbc); +int sync_inode_metadata(struct inode *inode, int wait); struct file_system_type { const char *name; @@ -2084,7 +2095,6 @@ extern int check_disk_change(struct block_device *); extern int __invalidate_device(struct block_device *); extern int invalidate_partition(struct gendisk *, int); #endif -extern int invalidate_inodes(struct super_block *); unsigned long invalidate_mapping_pages(struct address_space *mapping, pgoff_t start, pgoff_t end); @@ -2168,7 +2178,7 @@ extern loff_t vfs_llseek(struct file *file, loff_t offset, int origin); extern int inode_init_always(struct super_block *, struct inode *); extern void inode_init_once(struct inode *); -extern void inode_add_to_lists(struct super_block *, struct inode *); +extern void ihold(struct inode * inode); extern void iput(struct inode *); extern struct inode * igrab(struct inode *); extern ino_t iunique(struct super_block *, ino_t); @@ -2188,11 +2198,11 @@ extern struct inode * iget_locked(struct super_block *, unsigned long); extern int insert_inode_locked4(struct inode *, unsigned long, int (*test)(struct inode *, void *), void *); extern int insert_inode_locked(struct inode *); extern void unlock_new_inode(struct inode *); +extern unsigned int get_next_ino(void); extern void __iget(struct inode * inode); extern void iget_failed(struct inode *); extern void end_writeback(struct inode *); -extern void destroy_inode(struct inode *); extern void __destroy_inode(struct inode *); extern struct inode *new_inode(struct super_block *); extern int should_remove_suid(struct dentry *); @@ -2200,9 +2210,11 @@ extern int file_remove_suid(struct file *); extern void __insert_inode_hash(struct inode *, unsigned long hashval); extern void remove_inode_hash(struct inode *); -static inline void insert_inode_hash(struct inode *inode) { +static inline void insert_inode_hash(struct inode *inode) +{ __insert_inode_hash(inode, inode->i_ino); } +extern void inode_sb_list_add(struct inode *inode); #ifdef CONFIG_BLOCK extern void submit_bio(int, struct bio *); @@ -2485,7 +2497,10 @@ ssize_t simple_attr_write(struct file *file, const char __user *buf, struct ctl_table; int proc_nr_files(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos); - +int proc_nr_dentry(struct ctl_table *table, int write, + void __user *buffer, size_t *lenp, loff_t *ppos); +int proc_nr_inodes(struct ctl_table *table, int write, + void __user *buffer, size_t *lenp, loff_t *ppos); int __init get_filesystem_list(char *buf); #define ACC_MODE(x) ("\004\002\006\006"[(x)&O_ACCMODE]) diff --git a/include/linux/list.h b/include/linux/list.h index 88a0006..9a5f8a7 100644 --- a/include/linux/list.h +++ b/include/linux/list.h @@ -636,6 +636,12 @@ static inline void hlist_add_after(struct hlist_node *n, next->next->pprev = &next->next; } +/* after that we'll appear to be on some hlist and hlist_del will work */ +static inline void hlist_add_fake(struct hlist_node *n) +{ + n->pprev = &n->next; +} + /* * Move a list from one list head to another. Fixup the pprev * reference of the first entry if it exists. diff --git a/include/linux/reiserfs_fs.h b/include/linux/reiserfs_fs.h index 91a4177..5ca47e5 100644 --- a/include/linux/reiserfs_fs.h +++ b/include/linux/reiserfs_fs.h @@ -2072,6 +2072,8 @@ void sd_attrs_to_i_attrs(__u16 sd_attrs, struct inode *inode); void i_attrs_to_sd_attrs(struct inode *inode, __u16 * sd_attrs); int reiserfs_setattr(struct dentry *dentry, struct iattr *attr); +int __reiserfs_write_begin(struct page *page, unsigned from, unsigned len); + /* namei.c */ void set_de_name_and_namelen(struct reiserfs_dir_entry *de); int search_by_entry_key(struct super_block *sb, const struct cpu_key *key, diff --git a/include/linux/writeback.h b/include/linux/writeback.h index c7299d2..d5c7aaa 100644 --- a/include/linux/writeback.h +++ b/include/linux/writeback.h @@ -10,8 +10,6 @@ struct backing_dev_info; extern spinlock_t inode_lock; -extern struct list_head inode_in_use; -extern struct list_head inode_unused; /* * fs/fs-writeback.c diff --git a/ipc/mqueue.c b/ipc/mqueue.c index e1e7b96..3a61ffe 100644 --- a/ipc/mqueue.c +++ b/ipc/mqueue.c @@ -116,6 +116,7 @@ static struct inode *mqueue_get_inode(struct super_block *sb, inode = new_inode(sb); if (inode) { + inode->i_ino = get_next_ino(); inode->i_mode = mode; inode->i_uid = current_fsuid(); inode->i_gid = current_fsgid(); @@ -769,7 +770,7 @@ SYSCALL_DEFINE1(mq_unlink, const char __user *, u_name) inode = dentry->d_inode; if (inode) - atomic_inc(&inode->i_count); + ihold(inode); err = mnt_want_write(ipc_ns->mq_mnt); if (err) goto out_err; diff --git a/kernel/cgroup.c b/kernel/cgroup.c index 7b69b8d..9270d53 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -777,6 +777,7 @@ static struct inode *cgroup_new_inode(mode_t mode, struct super_block *sb) struct inode *inode = new_inode(sb); if (inode) { + inode->i_ino = get_next_ino(); inode->i_mode = mode; inode->i_uid = current_fsuid(); inode->i_gid = current_fsgid(); diff --git a/kernel/futex.c b/kernel/futex.c index a118bf1..6c683b3 100644 --- a/kernel/futex.c +++ b/kernel/futex.c @@ -169,7 +169,7 @@ static void get_futex_key_refs(union futex_key *key) switch (key->both.offset & (FUT_OFF_INODE|FUT_OFF_MMSHARED)) { case FUT_OFF_INODE: - atomic_inc(&key->shared.inode->i_count); + ihold(key->shared.inode); break; case FUT_OFF_MMSHARED: atomic_inc(&key->private.mm->mm_count); diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 48d9d68..c33a1ed 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -1338,14 +1338,14 @@ static struct ctl_table fs_table[] = { .data = &inodes_stat, .maxlen = 2*sizeof(int), .mode = 0444, - .proc_handler = proc_dointvec, + .proc_handler = proc_nr_inodes, }, { .procname = "inode-state", .data = &inodes_stat, .maxlen = 7*sizeof(int), .mode = 0444, - .proc_handler = proc_dointvec, + .proc_handler = proc_nr_inodes, }, { .procname = "file-nr", @@ -1375,7 +1375,7 @@ static struct ctl_table fs_table[] = { .data = &dentry_stat, .maxlen = 6*sizeof(int), .mode = 0444, - .proc_handler = proc_dointvec, + .proc_handler = proc_nr_dentry, }, { .procname = "overflowuid", diff --git a/mm/backing-dev.c b/mm/backing-dev.c index f2eb278..027100d 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c @@ -74,11 +74,11 @@ static int bdi_debug_stats_show(struct seq_file *m, void *v) nr_wb = nr_dirty = nr_io = nr_more_io = 0; spin_lock(&inode_lock); - list_for_each_entry(inode, &wb->b_dirty, i_list) + list_for_each_entry(inode, &wb->b_dirty, i_wb_list) nr_dirty++; - list_for_each_entry(inode, &wb->b_io, i_list) + list_for_each_entry(inode, &wb->b_io, i_wb_list) nr_io++; - list_for_each_entry(inode, &wb->b_more_io, i_list) + list_for_each_entry(inode, &wb->b_more_io, i_wb_list) nr_more_io++; spin_unlock(&inode_lock); @@ -1586,6 +1586,7 @@ static struct inode *shmem_get_inode(struct super_block *sb, const struct inode inode = new_inode(sb); if (inode) { + inode->i_ino = get_next_ino(); inode_init_owner(inode, dir, mode); inode->i_blocks = 0; inode->i_mapping->backing_dev_info = &shmem_backing_dev_info; @@ -1903,7 +1904,7 @@ static int shmem_link(struct dentry *old_dentry, struct inode *dir, struct dentr dir->i_size += BOGO_DIRENT_SIZE; inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME; inc_nlink(inode); - atomic_inc(&inode->i_count); /* New dentry reference */ + ihold(inode); /* New dentry reference */ dget(dentry); /* Extra pinning count for the created dentry */ d_instantiate(dentry, inode); out: @@ -2146,7 +2147,7 @@ static int shmem_encode_fh(struct dentry *dentry, __u32 *fh, int *len, if (*len < 3) return 255; - if (hlist_unhashed(&inode->i_hash)) { + if (inode_unhashed(inode)) { /* Unfortunately insert_inode_hash is not idempotent, * so as we hash inodes here rather than at creation * time, we need a lock to ensure we only try @@ -2154,7 +2155,7 @@ static int shmem_encode_fh(struct dentry *dentry, __u32 *fh, int *len, */ static DEFINE_SPINLOCK(lock); spin_lock(&lock); - if (hlist_unhashed(&inode->i_hash)) + if (inode_unhashed(inode)) __insert_inode_hash(inode, inode->i_ino + inode->i_generation); spin_unlock(&lock); diff --git a/net/socket.c b/net/socket.c index 7f67c07..ee3cd28 100644 --- a/net/socket.c +++ b/net/socket.c @@ -377,7 +377,7 @@ static int sock_alloc_file(struct socket *sock, struct file **f, int flags) &socket_file_ops); if (unlikely(!file)) { /* drop dentry, keep inode */ - atomic_inc(&path.dentry->d_inode->i_count); + ihold(path.dentry->d_inode); path_put(&path); put_unused_fd(fd); return -ENFILE; @@ -480,6 +480,7 @@ static struct socket *sock_alloc(void) sock = SOCKET_I(inode); kmemcheck_annotate_bitfield(sock, type); + inode->i_ino = get_next_ino(); inode->i_mode = S_IFSOCK | S_IRWXUGO; inode->i_uid = current_fsuid(); inode->i_gid = current_fsgid(); diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c index 52f2524..7df92d2 100644 --- a/net/sunrpc/rpc_pipe.c +++ b/net/sunrpc/rpc_pipe.c @@ -445,6 +445,7 @@ rpc_get_inode(struct super_block *sb, umode_t mode) struct inode *inode = new_inode(sb); if (!inode) return NULL; + inode->i_ino = get_next_ino(); inode->i_mode = mode; inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; switch(mode & S_IFMT) { diff --git a/security/apparmor/path.c b/security/apparmor/path.c index 8239605..36cc0cc 100644 --- a/security/apparmor/path.c +++ b/security/apparmor/path.c @@ -72,10 +72,8 @@ static int d_namespace_path(struct path *path, char *buf, int buflen, path_get(&root); } - spin_lock(&dcache_lock); tmp = root; res = __d_path(path, &tmp, buf, buflen); - spin_unlock(&dcache_lock); *name = res; /* handle error conditions - and still allow a partial path to diff --git a/security/inode.c b/security/inode.c index 8883986..cb8f47c 100644 --- a/security/inode.c +++ b/security/inode.c @@ -61,6 +61,7 @@ static struct inode *get_inode(struct super_block *sb, int mode, dev_t dev) struct inode *inode = new_inode(sb); if (inode) { + inode->i_ino = get_next_ino(); inode->i_mode = mode; inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; switch (mode & S_IFMT) { diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c index 87e0556..55a755c 100644 --- a/security/selinux/selinuxfs.c +++ b/security/selinux/selinuxfs.c @@ -978,6 +978,7 @@ static struct inode *sel_make_inode(struct super_block *sb, int mode) struct inode *ret = new_inode(sb); if (ret) { + ret->i_ino = get_next_ino(); ret->i_mode = mode; ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME; } diff --git a/security/tomoyo/realpath.c b/security/tomoyo/realpath.c index ed8ccd6..1d0bf8f 100644 --- a/security/tomoyo/realpath.c +++ b/security/tomoyo/realpath.c @@ -127,10 +127,8 @@ char *tomoyo_realpath_from_path(struct path *path) /* If we don't have a vfsmount, we can't calculate. */ if (!path->mnt) break; - spin_lock(&dcache_lock); /* go to whatever namespace root we are under */ pos = __d_path(path, &ns_root, buf, buf_len); - spin_unlock(&dcache_lock); /* Prepend "/proc" prefix if using internal proc vfs mount. */ if (!IS_ERR(pos) && (path->mnt->mnt_flags & MNT_INTERNAL) && (path->mnt->mnt_sb->s_magic == PROC_SUPER_MAGIC)) { |
