diff options
Diffstat (limited to 'fs/ext4/namei.c')
-rw-r--r-- | fs/ext4/namei.c | 121 |
1 files changed, 71 insertions, 50 deletions
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c index b17a082b7db1..686bf982c84e 100644 --- a/fs/ext4/namei.c +++ b/fs/ext4/namei.c @@ -731,6 +731,29 @@ struct stats dx_show_entries(struct dx_hash_info *hinfo, struct inode *dir, (space/bcount)*100/blocksize); return (struct stats) { names, space, bcount}; } + +/* + * Linear search cross check + */ +static inline void htree_rep_invariant_check(struct dx_entry *at, + struct dx_entry *target, + u32 hash, unsigned int n) +{ + while (n--) { + dxtrace(printk(KERN_CONT ",")); + if (dx_get_hash(++at) > hash) { + at--; + break; + } + } + ASSERT(at == target - 1); +} +#else /* DX_DEBUG */ +static inline void htree_rep_invariant_check(struct dx_entry *at, + struct dx_entry *target, + u32 hash, unsigned int n) +{ +} #endif /* DX_DEBUG */ /* @@ -827,20 +850,7 @@ dx_probe(struct ext4_filename *fname, struct inode *dir, p = m + 1; } - if (0) { // linear search cross check - unsigned n = count - 1; - at = entries; - while (n--) - { - dxtrace(printk(KERN_CONT ",")); - if (dx_get_hash(++at) > hash) - { - at--; - break; - } - } - ASSERT(at == p - 1); - } + htree_rep_invariant_check(entries, p, hash, count - 1); at = p - 1; dxtrace(printk(KERN_CONT " %x->%u\n", @@ -2401,11 +2411,10 @@ again: (frame - 1)->bh); if (err) goto journal_error; - if (restart) { - err = ext4_handle_dirty_dx_node(handle, dir, - frame->bh); + err = ext4_handle_dirty_dx_node(handle, dir, + frame->bh); + if (err) goto journal_error; - } } else { struct dx_root *dxroot; memcpy((char *) entries2, (char *) entries, @@ -2596,8 +2605,8 @@ static int ext4_add_nondir(handle_t *handle, * If the create succeeds, we fill in the inode information * with d_instantiate(). */ -static int ext4_create(struct inode *dir, struct dentry *dentry, umode_t mode, - bool excl) +static int ext4_create(struct user_namespace *mnt_userns, struct inode *dir, + struct dentry *dentry, umode_t mode, bool excl) { handle_t *handle; struct inode *inode; @@ -2610,8 +2619,8 @@ static int ext4_create(struct inode *dir, struct dentry *dentry, umode_t mode, credits = (EXT4_DATA_TRANS_BLOCKS(dir->i_sb) + EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3); retry: - inode = ext4_new_inode_start_handle(dir, mode, &dentry->d_name, 0, - NULL, EXT4_HT_DIR, credits); + inode = ext4_new_inode_start_handle(mnt_userns, dir, mode, &dentry->d_name, + 0, NULL, EXT4_HT_DIR, credits); handle = ext4_journal_current_handle(); err = PTR_ERR(inode); if (!IS_ERR(inode)) { @@ -2631,8 +2640,8 @@ retry: return err; } -static int ext4_mknod(struct inode *dir, struct dentry *dentry, - umode_t mode, dev_t rdev) +static int ext4_mknod(struct user_namespace *mnt_userns, struct inode *dir, + struct dentry *dentry, umode_t mode, dev_t rdev) { handle_t *handle; struct inode *inode; @@ -2645,8 +2654,8 @@ static int ext4_mknod(struct inode *dir, struct dentry *dentry, credits = (EXT4_DATA_TRANS_BLOCKS(dir->i_sb) + EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3); retry: - inode = ext4_new_inode_start_handle(dir, mode, &dentry->d_name, 0, - NULL, EXT4_HT_DIR, credits); + inode = ext4_new_inode_start_handle(mnt_userns, dir, mode, &dentry->d_name, + 0, NULL, EXT4_HT_DIR, credits); handle = ext4_journal_current_handle(); err = PTR_ERR(inode); if (!IS_ERR(inode)) { @@ -2665,7 +2674,8 @@ retry: return err; } -static int ext4_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) +static int ext4_tmpfile(struct user_namespace *mnt_userns, struct inode *dir, + struct dentry *dentry, umode_t mode) { handle_t *handle; struct inode *inode; @@ -2676,7 +2686,7 @@ static int ext4_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) return err; retry: - inode = ext4_new_inode_start_handle(dir, mode, + inode = ext4_new_inode_start_handle(mnt_userns, dir, mode, NULL, 0, NULL, EXT4_HT_DIR, EXT4_MAXQUOTAS_INIT_BLOCKS(dir->i_sb) + @@ -2774,7 +2784,8 @@ out: return err; } -static int ext4_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) +static int ext4_mkdir(struct user_namespace *mnt_userns, struct inode *dir, + struct dentry *dentry, umode_t mode) { handle_t *handle; struct inode *inode; @@ -2790,7 +2801,7 @@ static int ext4_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) credits = (EXT4_DATA_TRANS_BLOCKS(dir->i_sb) + EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3); retry: - inode = ext4_new_inode_start_handle(dir, S_IFDIR | mode, + inode = ext4_new_inode_start_handle(mnt_userns, dir, S_IFDIR | mode, &dentry->d_name, 0, NULL, EXT4_HT_DIR, credits); handle = ext4_journal_current_handle(); @@ -2976,14 +2987,17 @@ int ext4_orphan_add(handle_t *handle, struct inode *inode) (le32_to_cpu(sbi->s_es->s_inodes_count))) { /* Insert this inode at the head of the on-disk orphan list */ NEXT_ORPHAN(inode) = le32_to_cpu(sbi->s_es->s_last_orphan); + lock_buffer(sbi->s_sbh); sbi->s_es->s_last_orphan = cpu_to_le32(inode->i_ino); + ext4_superblock_csum_set(sb); + unlock_buffer(sbi->s_sbh); dirty = true; } list_add(&EXT4_I(inode)->i_orphan, &sbi->s_orphan); mutex_unlock(&sbi->s_orphan_lock); if (dirty) { - err = ext4_handle_dirty_super(handle, sb); + err = ext4_handle_dirty_metadata(handle, NULL, sbi->s_sbh); rc = ext4_mark_iloc_dirty(handle, inode, &iloc); if (!err) err = rc; @@ -3059,9 +3073,12 @@ int ext4_orphan_del(handle_t *handle, struct inode *inode) mutex_unlock(&sbi->s_orphan_lock); goto out_brelse; } + lock_buffer(sbi->s_sbh); sbi->s_es->s_last_orphan = cpu_to_le32(ino_next); + ext4_superblock_csum_set(inode->i_sb); + unlock_buffer(sbi->s_sbh); mutex_unlock(&sbi->s_orphan_lock); - err = ext4_handle_dirty_super(handle, inode->i_sb); + err = ext4_handle_dirty_metadata(handle, NULL, sbi->s_sbh); } else { struct ext4_iloc iloc2; struct inode *i_prev = @@ -3286,7 +3303,7 @@ out_trace: return retval; } -static int ext4_symlink(struct inode *dir, +static int ext4_symlink(struct user_namespace *mnt_userns, struct inode *dir, struct dentry *dentry, const char *symname) { handle_t *handle; @@ -3327,7 +3344,7 @@ static int ext4_symlink(struct inode *dir, EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3; } - inode = ext4_new_inode_start_handle(dir, S_IFLNK|S_IRWXUGO, + inode = ext4_new_inode_start_handle(mnt_userns, dir, S_IFLNK|S_IRWXUGO, &dentry->d_name, 0, NULL, EXT4_HT_DIR, credits); handle = ext4_journal_current_handle(); @@ -3593,9 +3610,6 @@ static int ext4_setent(handle_t *handle, struct ext4_renament *ent, return retval2; } } - brelse(ent->bh); - ent->bh = NULL; - return retval; } @@ -3659,7 +3673,8 @@ static void ext4_update_dir_count(handle_t *handle, struct ext4_renament *ent) } } -static struct inode *ext4_whiteout_for_rename(struct ext4_renament *ent, +static struct inode *ext4_whiteout_for_rename(struct user_namespace *mnt_userns, + struct ext4_renament *ent, int credits, handle_t **h) { struct inode *wh; @@ -3673,7 +3688,8 @@ static struct inode *ext4_whiteout_for_rename(struct ext4_renament *ent, credits += (EXT4_MAXQUOTAS_TRANS_BLOCKS(ent->dir->i_sb) + EXT4_XATTR_TRANS_BLOCKS + 4); retry: - wh = ext4_new_inode_start_handle(ent->dir, S_IFCHR | WHITEOUT_MODE, + wh = ext4_new_inode_start_handle(mnt_userns, ent->dir, + S_IFCHR | WHITEOUT_MODE, &ent->dentry->d_name, 0, NULL, EXT4_HT_DIR, credits); @@ -3700,9 +3716,9 @@ retry: * while new_{dentry,inode) refers to the destination dentry/inode * This comes from rename(const char *oldpath, const char *newpath) */ -static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry, - struct inode *new_dir, struct dentry *new_dentry, - unsigned int flags) +static int ext4_rename(struct user_namespace *mnt_userns, struct inode *old_dir, + struct dentry *old_dentry, struct inode *new_dir, + struct dentry *new_dentry, unsigned int flags) { handle_t *handle = NULL; struct ext4_renament old = { @@ -3786,7 +3802,7 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry, goto end_rename; } } else { - whiteout = ext4_whiteout_for_rename(&old, credits, &handle); + whiteout = ext4_whiteout_for_rename(mnt_userns, &old, credits, &handle); if (IS_ERR(whiteout)) { retval = PTR_ERR(whiteout); whiteout = NULL; @@ -3794,6 +3810,7 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry, } } + old_file_type = old.de->file_type; if (IS_DIRSYNC(old.dir) || IS_DIRSYNC(new.dir)) ext4_handle_sync(handle); @@ -3821,7 +3838,6 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry, force_reread = (new.dir->i_ino == old.dir->i_ino && ext4_test_inode_flag(new.dir, EXT4_INODE_INLINE_DATA)); - old_file_type = old.de->file_type; if (whiteout) { /* * Do this before adding a new entry, so the old entry is sure @@ -3919,15 +3935,19 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry, retval = 0; end_rename: - brelse(old.dir_bh); - brelse(old.bh); - brelse(new.bh); if (whiteout) { - if (retval) + if (retval) { + ext4_setent(handle, &old, + old.inode->i_ino, old_file_type); drop_nlink(whiteout); + } unlock_new_inode(whiteout); iput(whiteout); + } + brelse(old.dir_bh); + brelse(old.bh); + brelse(new.bh); if (handle) ext4_journal_stop(handle); return retval; @@ -4078,7 +4098,8 @@ end_rename: return retval; } -static int ext4_rename2(struct inode *old_dir, struct dentry *old_dentry, +static int ext4_rename2(struct user_namespace *mnt_userns, + struct inode *old_dir, struct dentry *old_dentry, struct inode *new_dir, struct dentry *new_dentry, unsigned int flags) { @@ -4100,7 +4121,7 @@ static int ext4_rename2(struct inode *old_dir, struct dentry *old_dentry, new_dir, new_dentry); } - return ext4_rename(old_dir, old_dentry, new_dir, new_dentry, flags); + return ext4_rename(mnt_userns, old_dir, old_dentry, new_dir, new_dentry, flags); } /* |