diff options
Diffstat (limited to 'fs/reiserfs/file.c')
| -rw-r--r-- | fs/reiserfs/file.c | 33 |
1 files changed, 26 insertions, 7 deletions
diff --git a/fs/reiserfs/file.c b/fs/reiserfs/file.c index ad6fa964b0e7..be12879bb179 100644 --- a/fs/reiserfs/file.c +++ b/fs/reiserfs/file.c @@ -192,6 +192,8 @@ static int reiserfs_allocate_blocks_for_region(struct reiserfs_transaction_handl allocated_blocks = kmalloc((blocks_to_allocate + will_prealloc) * sizeof(b_blocknr_t), GFP_NOFS); + if (!allocated_blocks) + return -ENOMEM; /* First we compose a key to point at the writing position, we want to do that outside of any locking region. */ @@ -1285,6 +1287,23 @@ static ssize_t reiserfs_file_write(struct file *file, /* the file we are going t struct reiserfs_transaction_handle th; th.t_trans_id = 0; + /* If a filesystem is converted from 3.5 to 3.6, we'll have v3.5 items + * lying around (most of the disk, in fact). Despite the filesystem + * now being a v3.6 format, the old items still can't support large + * file sizes. Catch this case here, as the rest of the VFS layer is + * oblivious to the different limitations between old and new items. + * reiserfs_setattr catches this for truncates. This chunk is lifted + * from generic_write_checks. */ + if (get_inode_item_key_version (inode) == KEY_FORMAT_3_5 && + *ppos + count > MAX_NON_LFS) { + if (*ppos >= MAX_NON_LFS) { + send_sig(SIGXFSZ, current, 0); + return -EFBIG; + } + if (count > MAX_NON_LFS - (unsigned long)*ppos) + count = MAX_NON_LFS - (unsigned long)*ppos; + } + if (file->f_flags & O_DIRECT) { // Direct IO needs treatment ssize_t result, after_file_end = 0; if ((*ppos + count >= inode->i_size) @@ -1445,13 +1464,11 @@ static ssize_t reiserfs_file_write(struct file *file, /* the file we are going t partially overwritten pages, if needed. And lock the pages, so that nobody else can access these until we are done. We get number of actual blocks needed as a result. */ - blocks_to_allocate = - reiserfs_prepare_file_region_for_write(inode, pos, - num_pages, - write_bytes, - prepared_pages); - if (blocks_to_allocate < 0) { - res = blocks_to_allocate; + res = reiserfs_prepare_file_region_for_write(inode, pos, + num_pages, + write_bytes, + prepared_pages); + if (res < 0) { reiserfs_release_claimed_blocks(inode->i_sb, num_pages << (PAGE_CACHE_SHIFT - @@ -1459,6 +1476,8 @@ static ssize_t reiserfs_file_write(struct file *file, /* the file we are going t break; } + blocks_to_allocate = res; + /* First we correct our estimate of how many blocks we need */ reiserfs_release_claimed_blocks(inode->i_sb, (num_pages << |
