diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/shmem.c | 23 | ||||
| -rw-r--r-- | mm/truncate.c | 38 |
2 files changed, 41 insertions, 20 deletions
diff --git a/mm/shmem.c b/mm/shmem.c index 566f9a481e6..dfaa0f4e978 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -766,6 +766,10 @@ static int shmem_notify_change(struct dentry *dentry, struct iattr *attr) loff_t newsize = attr->ia_size; int error; + error = inode_change_ok(inode, attr); + if (error) + return error; + if (S_ISREG(inode->i_mode) && (attr->ia_valid & ATTR_SIZE) && newsize != inode->i_size) { struct page *page = NULL; @@ -800,25 +804,22 @@ static int shmem_notify_change(struct dentry *dentry, struct iattr *attr) } } - error = simple_setsize(inode, newsize); + /* XXX(truncate): truncate_setsize should be called last */ + truncate_setsize(inode, newsize); if (page) page_cache_release(page); - if (error) - return error; shmem_truncate_range(inode, newsize, (loff_t)-1); } - error = inode_change_ok(inode, attr); - if (!error) - generic_setattr(inode, attr); + setattr_copy(inode, attr); #ifdef CONFIG_TMPFS_POSIX_ACL - if (!error && (attr->ia_valid & ATTR_MODE)) + if (attr->ia_valid & ATTR_MODE) error = generic_acl_chmod(inode); #endif return error; } -static void shmem_delete_inode(struct inode *inode) +static void shmem_evict_inode(struct inode *inode) { struct shmem_inode_info *info = SHMEM_I(inode); @@ -835,7 +836,7 @@ static void shmem_delete_inode(struct inode *inode) } BUG_ON(inode->i_blocks); shmem_free_inode(inode->i_sb); - clear_inode(inode); + end_writeback(inode); } static inline int shmem_find_swp(swp_entry_t entry, swp_entry_t *dir, swp_entry_t *edir) @@ -932,7 +933,7 @@ found: /* * Move _head_ to start search for next from here. - * But be careful: shmem_delete_inode checks list_empty without taking + * But be careful: shmem_evict_inode checks list_empty without taking * mutex, and there's an instant in list_move_tail when info->swaplist * would appear empty, if it were the only one on shmem_swaplist. We * could avoid doing it if inode NULL; or use this minor optimization. @@ -2518,7 +2519,7 @@ static const struct super_operations shmem_ops = { .remount_fs = shmem_remount_fs, .show_options = shmem_show_options, #endif - .delete_inode = shmem_delete_inode, + .evict_inode = shmem_evict_inode, .drop_inode = generic_delete_inode, .put_super = shmem_put_super, }; diff --git a/mm/truncate.c b/mm/truncate.c index 937571b8b23..ba887bff48c 100644 --- a/mm/truncate.c +++ b/mm/truncate.c @@ -541,28 +541,48 @@ void truncate_pagecache(struct inode *inode, loff_t old, loff_t new) EXPORT_SYMBOL(truncate_pagecache); /** + * truncate_setsize - update inode and pagecache for a new file size + * @inode: inode + * @newsize: new file size + * + * truncate_setsize updastes i_size update and performs pagecache + * truncation (if necessary) for a file size updates. It will be + * typically be called from the filesystem's setattr function when + * ATTR_SIZE is passed in. + * + * Must be called with inode_mutex held and after all filesystem + * specific block truncation has been performed. + */ +void truncate_setsize(struct inode *inode, loff_t newsize) +{ + loff_t oldsize; + + oldsize = inode->i_size; + i_size_write(inode, newsize); + + truncate_pagecache(inode, oldsize, newsize); +} +EXPORT_SYMBOL(truncate_setsize); + +/** * vmtruncate - unmap mappings "freed" by truncate() syscall * @inode: inode of the file used * @offset: file offset to start truncating * - * NOTE! We have to be ready to update the memory sharing - * between the file and the memory map for a potential last - * incomplete page. Ugly, but necessary. - * - * This function is deprecated and simple_setsize or truncate_pagecache - * should be used instead. + * This function is deprecated and truncate_setsize or truncate_pagecache + * should be used instead, together with filesystem specific block truncation. */ int vmtruncate(struct inode *inode, loff_t offset) { int error; - error = simple_setsize(inode, offset); + error = inode_newsize_ok(inode, offset); if (error) return error; + truncate_setsize(inode, offset); if (inode->i_op->truncate) inode->i_op->truncate(inode); - - return error; + return 0; } EXPORT_SYMBOL(vmtruncate); |