diff options
Diffstat (limited to 'fs/ubifs')
-rw-r--r-- | fs/ubifs/budget.c | 9 | ||||
-rw-r--r-- | fs/ubifs/commit.c | 6 | ||||
-rw-r--r-- | fs/ubifs/dir.c | 16 | ||||
-rw-r--r-- | fs/ubifs/file.c | 16 | ||||
-rw-r--r-- | fs/ubifs/journal.c | 2 | ||||
-rw-r--r-- | fs/ubifs/lpt.c | 2 | ||||
-rw-r--r-- | fs/ubifs/tnc.c | 158 | ||||
-rw-r--r-- | fs/ubifs/tnc_misc.c | 4 |
8 files changed, 140 insertions, 73 deletions
diff --git a/fs/ubifs/budget.c b/fs/ubifs/budget.c index 7ef22baf9d15..30c7bd63c2ad 100644 --- a/fs/ubifs/budget.c +++ b/fs/ubifs/budget.c @@ -224,11 +224,10 @@ long long ubifs_calc_available(const struct ubifs_info *c, int min_idx_lebs) subtract_lebs += 1; /* - * The GC journal head LEB is not really accessible. And since - * different write types go to different heads, we may count only on - * one head's space. + * Since different write types go to different heads, we should + * reserve one leb for each head. */ - subtract_lebs += c->jhead_cnt - 1; + subtract_lebs += c->jhead_cnt; /* We also reserve one LEB for deletions, which bypass budgeting */ subtract_lebs += 1; @@ -415,7 +414,7 @@ static int calc_dd_growth(const struct ubifs_info *c, dd_growth = req->dirtied_page ? c->bi.page_budget : 0; if (req->dirtied_ino) - dd_growth += c->bi.inode_budget << (req->dirtied_ino - 1); + dd_growth += c->bi.inode_budget * req->dirtied_ino; if (req->mod_dent) dd_growth += c->bi.dent_budget; dd_growth += req->dirtied_ino_d; diff --git a/fs/ubifs/commit.c b/fs/ubifs/commit.c index 591f2c7a48f0..583e20787689 100644 --- a/fs/ubifs/commit.c +++ b/fs/ubifs/commit.c @@ -564,11 +564,11 @@ out: */ int dbg_check_old_index(struct ubifs_info *c, struct ubifs_zbranch *zroot) { - int lnum, offs, len, err = 0, uninitialized_var(last_level), child_cnt; + int lnum, offs, len, err = 0, last_level, child_cnt; int first = 1, iip; struct ubifs_debug_info *d = c->dbg; - union ubifs_key uninitialized_var(lower_key), upper_key, l_key, u_key; - unsigned long long uninitialized_var(last_sqnum); + union ubifs_key lower_key, upper_key, l_key, u_key; + unsigned long long last_sqnum; struct ubifs_idx_node *idx; struct list_head list; struct idx_node *i; diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c index 111905ddbfc2..39296e801242 100644 --- a/fs/ubifs/dir.c +++ b/fs/ubifs/dir.c @@ -445,6 +445,7 @@ static int do_tmpfile(struct inode *dir, struct dentry *dentry, mutex_unlock(&dir_ui->ui_mutex); ubifs_release_budget(c, &req); + fscrypt_free_filename(&nm); return 0; @@ -1141,7 +1142,6 @@ static int ubifs_symlink(struct inode *dir, struct dentry *dentry, int err, sz_change, len = strlen(symname); struct fscrypt_str disk_link; struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1, - .new_ino_d = ALIGN(len, 8), .dirtied_ino = 1 }; struct fscrypt_name nm; @@ -1157,6 +1157,7 @@ static int ubifs_symlink(struct inode *dir, struct dentry *dentry, * Budget request settings: new inode, new direntry and changing parent * directory inode. */ + req.new_ino_d = ALIGN(disk_link.len - 1, 8); err = ubifs_budget_space(c, &req); if (err) return err; @@ -1293,7 +1294,7 @@ static int do_rename(struct inode *old_dir, struct dentry *old_dentry, struct ubifs_budget_req ino_req = { .dirtied_ino = 1, .dirtied_ino_d = ALIGN(old_inode_ui->data_len, 8) }; struct timespec64 time; - unsigned int uninitialized_var(saved_nlink); + unsigned int saved_nlink; struct fscrypt_name old_nm, new_nm; /* @@ -1309,9 +1310,13 @@ static int do_rename(struct inode *old_dir, struct dentry *old_dentry, old_dentry, old_inode->i_ino, old_dir->i_ino, new_dentry, new_dir->i_ino, flags); - if (unlink) + if (unlink) { ubifs_assert(c, inode_is_locked(new_inode)); + /* Budget for old inode's data when its nlink > 1. */ + req.dirtied_ino_d = ALIGN(ubifs_inode(new_inode)->data_len, 8); + } + if (unlink && is_dir) { err = ubifs_check_dir_empty(new_inode); if (err) @@ -1549,6 +1554,10 @@ static int ubifs_xrename(struct inode *old_dir, struct dentry *old_dentry, return err; } + err = ubifs_budget_space(c, &req); + if (err) + goto out; + lock_4_inodes(old_dir, new_dir, NULL, NULL); time = current_time(old_dir); @@ -1574,6 +1583,7 @@ static int ubifs_xrename(struct inode *old_dir, struct dentry *old_dentry, unlock_4_inodes(old_dir, new_dir, NULL, NULL); ubifs_release_budget(c, &req); +out: fscrypt_free_filename(&fst_nm); fscrypt_free_filename(&snd_nm); return err; diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c index 3dbb5ac630e4..fca3b7f483c7 100644 --- a/fs/ubifs/file.c +++ b/fs/ubifs/file.c @@ -234,7 +234,7 @@ static int write_begin_slow(struct address_space *mapping, struct ubifs_info *c = inode->i_sb->s_fs_info; pgoff_t index = pos >> PAGE_SHIFT; struct ubifs_budget_req req = { .new_page = 1 }; - int uninitialized_var(err), appending = !!(pos + len > inode->i_size); + int err, appending = !!(pos + len > inode->i_size); struct page *page; dbg_gen("ino %lu, pos %llu, len %u, i_size %lld", @@ -438,7 +438,7 @@ static int ubifs_write_begin(struct file *file, struct address_space *mapping, struct ubifs_info *c = inode->i_sb->s_fs_info; struct ubifs_inode *ui = ubifs_inode(inode); pgoff_t index = pos >> PAGE_SHIFT; - int uninitialized_var(err), appending = !!(pos + len > inode->i_size); + int err, appending = !!(pos + len > inode->i_size); int skipped_read = 0; struct page *page; @@ -1043,7 +1043,7 @@ static int ubifs_writepage(struct page *page, struct writeback_control *wbc) if (page->index >= synced_i_size >> PAGE_SHIFT) { err = inode->i_sb->s_op->write_inode(inode, NULL); if (err) - goto out_unlock; + goto out_redirty; /* * The inode has been written, but the write-buffer has * not been synchronized, so in case of an unclean @@ -1071,11 +1071,17 @@ static int ubifs_writepage(struct page *page, struct writeback_control *wbc) if (i_size > synced_i_size) { err = inode->i_sb->s_op->write_inode(inode, NULL); if (err) - goto out_unlock; + goto out_redirty; } return do_writepage(page, len); - +out_redirty: + /* + * redirty_page_for_writepage() won't call ubifs_dirty_inode() because + * it passes I_DIRTY_PAGES flag while calling __mark_inode_dirty(), so + * there is no need to do space budget for dirty inode. + */ + redirty_page_for_writepage(wbc, page); out_unlock: unlock_page(page); return err; diff --git a/fs/ubifs/journal.c b/fs/ubifs/journal.c index 802565a17733..0a60a065c7e8 100644 --- a/fs/ubifs/journal.c +++ b/fs/ubifs/journal.c @@ -1355,7 +1355,7 @@ int ubifs_jnl_truncate(struct ubifs_info *c, const struct inode *inode, union ubifs_key key, to_key; struct ubifs_ino_node *ino; struct ubifs_trun_node *trun; - struct ubifs_data_node *uninitialized_var(dn); + struct ubifs_data_node *dn; int err, dlen, len, lnum, offs, bit, sz, sync = IS_SYNC(inode); struct ubifs_inode *ui = ubifs_inode(inode); ino_t inum = inode->i_ino; diff --git a/fs/ubifs/lpt.c b/fs/ubifs/lpt.c index 31393370e334..433bfcddc497 100644 --- a/fs/ubifs/lpt.c +++ b/fs/ubifs/lpt.c @@ -287,7 +287,7 @@ uint32_t ubifs_unpack_bits(const struct ubifs_info *c, uint8_t **addr, int *pos, const int k = 32 - nrbits; uint8_t *p = *addr; int b = *pos; - uint32_t uninitialized_var(val); + uint32_t val; const int bytes = (nrbits + b + 7) >> 3; ubifs_assert(c, nrbits > 0); diff --git a/fs/ubifs/tnc.c b/fs/ubifs/tnc.c index f15ac37956e7..330ccf72745b 100644 --- a/fs/ubifs/tnc.c +++ b/fs/ubifs/tnc.c @@ -56,6 +56,33 @@ enum { NOT_ON_MEDIA = 3, }; +static void do_insert_old_idx(struct ubifs_info *c, + struct ubifs_old_idx *old_idx) +{ + struct ubifs_old_idx *o; + struct rb_node **p, *parent = NULL; + + p = &c->old_idx.rb_node; + while (*p) { + parent = *p; + o = rb_entry(parent, struct ubifs_old_idx, rb); + if (old_idx->lnum < o->lnum) + p = &(*p)->rb_left; + else if (old_idx->lnum > o->lnum) + p = &(*p)->rb_right; + else if (old_idx->offs < o->offs) + p = &(*p)->rb_left; + else if (old_idx->offs > o->offs) + p = &(*p)->rb_right; + else { + ubifs_err(c, "old idx added twice!"); + kfree(old_idx); + } + } + rb_link_node(&old_idx->rb, parent, p); + rb_insert_color(&old_idx->rb, &c->old_idx); +} + /** * insert_old_idx - record an index node obsoleted since the last commit start. * @c: UBIFS file-system description object @@ -81,35 +108,15 @@ enum { */ static int insert_old_idx(struct ubifs_info *c, int lnum, int offs) { - struct ubifs_old_idx *old_idx, *o; - struct rb_node **p, *parent = NULL; + struct ubifs_old_idx *old_idx; old_idx = kmalloc(sizeof(struct ubifs_old_idx), GFP_NOFS); if (unlikely(!old_idx)) return -ENOMEM; old_idx->lnum = lnum; old_idx->offs = offs; + do_insert_old_idx(c, old_idx); - p = &c->old_idx.rb_node; - while (*p) { - parent = *p; - o = rb_entry(parent, struct ubifs_old_idx, rb); - if (lnum < o->lnum) - p = &(*p)->rb_left; - else if (lnum > o->lnum) - p = &(*p)->rb_right; - else if (offs < o->offs) - p = &(*p)->rb_left; - else if (offs > o->offs) - p = &(*p)->rb_right; - else { - ubifs_err(c, "old idx added twice!"); - kfree(old_idx); - return 0; - } - } - rb_link_node(&old_idx->rb, parent, p); - rb_insert_color(&old_idx->rb, &c->old_idx); return 0; } @@ -211,23 +218,6 @@ static struct ubifs_znode *copy_znode(struct ubifs_info *c, __set_bit(DIRTY_ZNODE, &zn->flags); __clear_bit(COW_ZNODE, &zn->flags); - ubifs_assert(c, !ubifs_zn_obsolete(znode)); - __set_bit(OBSOLETE_ZNODE, &znode->flags); - - if (znode->level != 0) { - int i; - const int n = zn->child_cnt; - - /* The children now have new parent */ - for (i = 0; i < n; i++) { - struct ubifs_zbranch *zbr = &zn->zbranch[i]; - - if (zbr->znode) - zbr->znode->parent = zn; - } - } - - atomic_long_inc(&c->dirty_zn_cnt); return zn; } @@ -246,6 +236,42 @@ static int add_idx_dirt(struct ubifs_info *c, int lnum, int dirt) } /** + * replace_znode - replace old znode with new znode. + * @c: UBIFS file-system description object + * @new_zn: new znode + * @old_zn: old znode + * @zbr: the branch of parent znode + * + * Replace old znode with new znode in TNC. + */ +static void replace_znode(struct ubifs_info *c, struct ubifs_znode *new_zn, + struct ubifs_znode *old_zn, struct ubifs_zbranch *zbr) +{ + ubifs_assert(c, !ubifs_zn_obsolete(old_zn)); + __set_bit(OBSOLETE_ZNODE, &old_zn->flags); + + if (old_zn->level != 0) { + int i; + const int n = new_zn->child_cnt; + + /* The children now have new parent */ + for (i = 0; i < n; i++) { + struct ubifs_zbranch *child = &new_zn->zbranch[i]; + + if (child->znode) + child->znode->parent = new_zn; + } + } + + zbr->znode = new_zn; + zbr->lnum = 0; + zbr->offs = 0; + zbr->len = 0; + + atomic_long_inc(&c->dirty_zn_cnt); +} + +/** * dirty_cow_znode - ensure a znode is not being committed. * @c: UBIFS file-system description object * @zbr: branch of znode to check @@ -277,21 +303,32 @@ static struct ubifs_znode *dirty_cow_znode(struct ubifs_info *c, return zn; if (zbr->len) { - err = insert_old_idx(c, zbr->lnum, zbr->offs); - if (unlikely(err)) - return ERR_PTR(err); + struct ubifs_old_idx *old_idx; + + old_idx = kmalloc(sizeof(struct ubifs_old_idx), GFP_NOFS); + if (unlikely(!old_idx)) { + err = -ENOMEM; + goto out; + } + old_idx->lnum = zbr->lnum; + old_idx->offs = zbr->offs; + err = add_idx_dirt(c, zbr->lnum, zbr->len); - } else - err = 0; + if (err) { + kfree(old_idx); + goto out; + } - zbr->znode = zn; - zbr->lnum = 0; - zbr->offs = 0; - zbr->len = 0; + do_insert_old_idx(c, old_idx); + } + + replace_znode(c, zn, znode, zbr); - if (unlikely(err)) - return ERR_PTR(err); return zn; + +out: + kfree(zn); + return ERR_PTR(err); } /** @@ -899,7 +936,7 @@ static int fallible_resolve_collision(struct ubifs_info *c, int adding) { struct ubifs_znode *o_znode = NULL, *znode = *zn; - int uninitialized_var(o_n), err, cmp, unsure = 0, nn = *n; + int o_n, err, cmp, unsure = 0, nn = *n; cmp = fallible_matches_name(c, &znode->zbranch[nn], nm); if (unlikely(cmp < 0)) @@ -1521,8 +1558,8 @@ out: */ int ubifs_tnc_get_bu_keys(struct ubifs_info *c, struct bu_info *bu) { - int n, err = 0, lnum = -1, uninitialized_var(offs); - int uninitialized_var(len); + int n, err = 0, lnum = -1, offs; + int len; unsigned int block = key_block(c, &bu->key); struct ubifs_znode *znode; @@ -3046,6 +3083,21 @@ static void tnc_destroy_cnext(struct ubifs_info *c) cnext = cnext->cnext; if (ubifs_zn_obsolete(znode)) kfree(znode); + else if (!ubifs_zn_cow(znode)) { + /* + * Don't forget to update clean znode count after + * committing failed, because ubifs will check this + * count while closing tnc. Non-obsolete znode could + * be re-dirtied during committing process, so dirty + * flag is untrustable. The flag 'COW_ZNODE' is set + * for each dirty znode before committing, and it is + * cleared as long as the znode become clean, so we + * can statistic clean znode count according to this + * flag. + */ + atomic_long_inc(&c->clean_zn_cnt); + atomic_long_inc(&ubifs_clean_zn_cnt); + } } while (cnext && cnext != c->cnext); } diff --git a/fs/ubifs/tnc_misc.c b/fs/ubifs/tnc_misc.c index d90ee01076a9..fe3b52d2749b 100644 --- a/fs/ubifs/tnc_misc.c +++ b/fs/ubifs/tnc_misc.c @@ -138,8 +138,8 @@ int ubifs_search_zbranch(const struct ubifs_info *c, const struct ubifs_znode *znode, const union ubifs_key *key, int *n) { - int beg = 0, end = znode->child_cnt, uninitialized_var(mid); - int uninitialized_var(cmp); + int beg = 0, end = znode->child_cnt, mid; + int cmp; const struct ubifs_zbranch *zbr = &znode->zbranch[0]; ubifs_assert(c, end > beg); |