^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /* * This file is part of UBIFS.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (C) 2006-2008 Nokia Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2006, 2007 University of Szeged, Hungary
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Authors: Artem Bityutskiy (Битюцкий Артём)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Adrian Hunter
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Zoltan Sogor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * This file implements directory operations.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * All FS operations in this file allocate budget before writing anything to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * media. If they fail to allocate it, the error is returned. The only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * exceptions are 'ubifs_unlink()' and 'ubifs_rmdir()' which keep working even
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * if they unable to allocate the budget, because deletion %-ENOSPC failure is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * not what users are usually ready to get. UBIFS budgeting subsystem has some
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * space reserved for these purposes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * All operations in this file write all inodes which they change straight
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * away, instead of marking them dirty. For example, 'ubifs_link()' changes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * @i_size of the parent inode and writes the parent inode together with the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * target inode. This was done to simplify file-system recovery which would
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * otherwise be very difficult to do. The only exception is rename which marks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * the re-named inode dirty (because its @i_ctime is updated) but does not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * write it, but just marks it as dirty.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include "ubifs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * inherit_flags - inherit flags of the parent inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * @dir: parent inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * @mode: new inode mode flags
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * This is a helper function for 'ubifs_new_inode()' which inherits flag of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * parent directory inode @dir. UBIFS inodes inherit the following flags:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * o %UBIFS_COMPR_FL, which is useful to switch compression on/of on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * sub-directory basis;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) * o %UBIFS_SYNC_FL - useful for the same reasons;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * o %UBIFS_DIRSYNC_FL - similar, but relevant only to directories.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) * This function returns the inherited flags.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) static int inherit_flags(const struct inode *dir, umode_t mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) int flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) const struct ubifs_inode *ui = ubifs_inode(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) if (!S_ISDIR(dir->i_mode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) * The parent is not a directory, which means that an extended
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) * attribute inode is being created. No flags.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) flags = ui->flags & (UBIFS_COMPR_FL | UBIFS_SYNC_FL | UBIFS_DIRSYNC_FL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) if (!S_ISDIR(mode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) /* The "DIRSYNC" flag only applies to directories */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) flags &= ~UBIFS_DIRSYNC_FL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) return flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) * ubifs_new_inode - allocate new UBIFS inode object.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) * @c: UBIFS file-system description object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * @dir: parent directory inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) * @mode: inode mode flags
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) * This function finds an unused inode number, allocates new inode and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) * initializes it. Returns new inode in case of success and an error code in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) * case of failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) struct inode *ubifs_new_inode(struct ubifs_info *c, struct inode *dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) umode_t mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) struct ubifs_inode *ui;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) bool encrypted = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) inode = new_inode(c->vfs_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) ui = ubifs_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) if (!inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) * Set 'S_NOCMTIME' to prevent VFS form updating [mc]time of inodes and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) * marking them dirty in file write path (see 'file_update_time()').
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) * UBIFS has to fully control "clean <-> dirty" transitions of inodes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) * to make budgeting work.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) inode->i_flags |= S_NOCMTIME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) inode_init_owner(inode, dir, mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) inode->i_mtime = inode->i_atime = inode->i_ctime =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) current_time(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) inode->i_mapping->nrpages = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) err = fscrypt_prepare_new_inode(dir, inode, &encrypted);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) ubifs_err(c, "fscrypt_prepare_new_inode failed: %i", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) goto out_iput;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) switch (mode & S_IFMT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) case S_IFREG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) inode->i_mapping->a_ops = &ubifs_file_address_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) inode->i_op = &ubifs_file_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) inode->i_fop = &ubifs_file_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) case S_IFDIR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) inode->i_op = &ubifs_dir_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) inode->i_fop = &ubifs_dir_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) inode->i_size = ui->ui_size = UBIFS_INO_NODE_SZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) case S_IFLNK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) inode->i_op = &ubifs_symlink_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) case S_IFSOCK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) case S_IFIFO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) case S_IFBLK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) case S_IFCHR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) inode->i_op = &ubifs_file_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) BUG();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) ui->flags = inherit_flags(dir, mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) ubifs_set_inode_flags(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) if (S_ISREG(mode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) ui->compr_type = c->default_compr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) ui->compr_type = UBIFS_COMPR_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) ui->synced_i_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) spin_lock(&c->cnt_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) /* Inode number overflow is currently not supported */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) if (c->highest_inum >= INUM_WARN_WATERMARK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) if (c->highest_inum >= INUM_WATERMARK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) spin_unlock(&c->cnt_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) ubifs_err(c, "out of inode numbers");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) goto out_iput;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) ubifs_warn(c, "running out of inode numbers (current %lu, max %u)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) (unsigned long)c->highest_inum, INUM_WATERMARK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) inode->i_ino = ++c->highest_inum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) * The creation sequence number remains with this inode for its
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) * lifetime. All nodes for this inode have a greater sequence number,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) * and so it is possible to distinguish obsolete nodes belonging to a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) * previous incarnation of the same inode number - for example, for the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) * purpose of rebuilding the index.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) ui->creat_sqnum = ++c->max_sqnum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) spin_unlock(&c->cnt_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) if (encrypted) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) err = fscrypt_set_context(inode, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) ubifs_err(c, "fscrypt_set_context failed: %i", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) goto out_iput;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) return inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) out_iput:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) make_bad_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) iput(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) return ERR_PTR(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) static int dbg_check_name(const struct ubifs_info *c,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) const struct ubifs_dent_node *dent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) const struct fscrypt_name *nm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) if (!dbg_is_chk_gen(c))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) if (le16_to_cpu(dent->nlen) != fname_len(nm))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) if (memcmp(dent->name, fname_name(nm), fname_len(nm)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) static struct dentry *ubifs_lookup(struct inode *dir, struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) unsigned int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) union ubifs_key key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) struct inode *inode = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) struct ubifs_dent_node *dent = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) struct ubifs_info *c = dir->i_sb->s_fs_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) struct fscrypt_name nm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) dbg_gen("'%pd' in dir ino %lu", dentry, dir->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) err = fscrypt_prepare_lookup(dir, dentry, &nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) generic_set_encrypted_ci_d_ops(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) if (err == -ENOENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) return d_splice_alias(NULL, dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) return ERR_PTR(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) if (fname_len(&nm) > UBIFS_MAX_NLEN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) inode = ERR_PTR(-ENAMETOOLONG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) dent = kmalloc(UBIFS_MAX_DENT_NODE_SZ, GFP_NOFS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) if (!dent) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) inode = ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) if (fname_name(&nm) == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) if (nm.hash & ~UBIFS_S_KEY_HASH_MASK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) goto done; /* ENOENT */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) dent_key_init_hash(c, &key, dir->i_ino, nm.hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) err = ubifs_tnc_lookup_dh(c, &key, dent, nm.minor_hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) dent_key_init(c, &key, dir->i_ino, &nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) err = ubifs_tnc_lookup_nm(c, &key, dent, &nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) if (err == -ENOENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) dbg_gen("not found");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) inode = ERR_PTR(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) if (dbg_check_name(c, dent, &nm)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) inode = ERR_PTR(-EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) inode = ubifs_iget(dir->i_sb, le64_to_cpu(dent->inum));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) if (IS_ERR(inode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) * This should not happen. Probably the file-system needs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) * checking.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) err = PTR_ERR(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) ubifs_err(c, "dead directory entry '%pd', error %d",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) dentry, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) ubifs_ro_mode(c, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) if (IS_ENCRYPTED(dir) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) !fscrypt_has_permitted_context(dir, inode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) ubifs_warn(c, "Inconsistent encryption contexts: %lu/%lu",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) dir->i_ino, inode->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) iput(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) inode = ERR_PTR(-EPERM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) kfree(dent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) fscrypt_free_filename(&nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) return d_splice_alias(inode, dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) static int ubifs_prepare_create(struct inode *dir, struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) struct fscrypt_name *nm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) if (fscrypt_is_nokey_name(dentry))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) return -ENOKEY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) return fscrypt_setup_filename(dir, &dentry->d_name, 0, nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) static int ubifs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) bool excl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) struct ubifs_info *c = dir->i_sb->s_fs_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) .dirtied_ino = 1 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) struct ubifs_inode *dir_ui = ubifs_inode(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) struct fscrypt_name nm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) int err, sz_change;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) * Budget request settings: new inode, new direntry, changing the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) * parent directory inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) dbg_gen("dent '%pd', mode %#hx in dir ino %lu",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) dentry, mode, dir->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) err = ubifs_budget_space(c, &req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) err = ubifs_prepare_create(dir, dentry, &nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) goto out_budg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) sz_change = CALC_DENT_SIZE(fname_len(&nm));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) inode = ubifs_new_inode(c, dir, mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) if (IS_ERR(inode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) err = PTR_ERR(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) goto out_fname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) err = ubifs_init_security(dir, inode, &dentry->d_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) goto out_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) mutex_lock(&dir_ui->ui_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) dir->i_size += sz_change;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) dir_ui->ui_size = dir->i_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) dir->i_mtime = dir->i_ctime = inode->i_ctime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) goto out_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) mutex_unlock(&dir_ui->ui_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) ubifs_release_budget(c, &req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) fscrypt_free_filename(&nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) insert_inode_hash(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) d_instantiate(dentry, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) out_cancel:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) dir->i_size -= sz_change;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) dir_ui->ui_size = dir->i_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) mutex_unlock(&dir_ui->ui_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) out_inode:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) make_bad_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) iput(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) out_fname:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) fscrypt_free_filename(&nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) out_budg:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) ubifs_release_budget(c, &req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) ubifs_err(c, "cannot create regular file, error %d", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) static int do_tmpfile(struct inode *dir, struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) umode_t mode, struct inode **whiteout)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) struct ubifs_info *c = dir->i_sb->s_fs_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) struct ubifs_budget_req ino_req = { .dirtied_ino = 1 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) struct ubifs_inode *ui, *dir_ui = ubifs_inode(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) int err, instantiated = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) struct fscrypt_name nm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) * Budget request settings: new dirty inode, new direntry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) * budget for dirtied inode will be released via writeback.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) dbg_gen("dent '%pd', mode %#hx in dir ino %lu",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) dentry, mode, dir->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) err = ubifs_budget_space(c, &req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) fscrypt_free_filename(&nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) err = ubifs_budget_space(c, &ino_req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) ubifs_release_budget(c, &req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) fscrypt_free_filename(&nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) inode = ubifs_new_inode(c, dir, mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) if (IS_ERR(inode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) err = PTR_ERR(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) goto out_budg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) ui = ubifs_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) if (whiteout) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) ubifs_assert(c, inode->i_op == &ubifs_file_inode_operations);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) err = ubifs_init_security(dir, inode, &dentry->d_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) goto out_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) mutex_lock(&ui->ui_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) insert_inode_hash(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) if (whiteout) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) mark_inode_dirty(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) drop_nlink(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) *whiteout = inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) d_tmpfile(dentry, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) ubifs_assert(c, ui->dirty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) instantiated = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) mutex_unlock(&ui->ui_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) mutex_lock(&dir_ui->ui_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) err = ubifs_jnl_update(c, dir, &nm, inode, 1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) goto out_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) mutex_unlock(&dir_ui->ui_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) ubifs_release_budget(c, &req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) out_cancel:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) mutex_unlock(&dir_ui->ui_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) out_inode:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) make_bad_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) if (!instantiated)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) iput(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) else if (whiteout)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) iput(*whiteout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) out_budg:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) ubifs_release_budget(c, &req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) if (!instantiated)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) ubifs_release_budget(c, &ino_req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) fscrypt_free_filename(&nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) ubifs_err(c, "cannot create temporary file, error %d", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) static int ubifs_tmpfile(struct inode *dir, struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) umode_t mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) return do_tmpfile(dir, dentry, mode, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) * vfs_dent_type - get VFS directory entry type.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) * @type: UBIFS directory entry type
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) * This function converts UBIFS directory entry type into VFS directory entry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) * type.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) static unsigned int vfs_dent_type(uint8_t type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) switch (type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) case UBIFS_ITYPE_REG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) return DT_REG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) case UBIFS_ITYPE_DIR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) return DT_DIR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) case UBIFS_ITYPE_LNK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) return DT_LNK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) case UBIFS_ITYPE_BLK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) return DT_BLK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) case UBIFS_ITYPE_CHR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) return DT_CHR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) case UBIFS_ITYPE_FIFO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) return DT_FIFO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) case UBIFS_ITYPE_SOCK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) return DT_SOCK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) BUG();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) * The classical Unix view for directory is that it is a linear array of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) * (name, inode number) entries. Linux/VFS assumes this model as well.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) * Particularly, 'readdir()' call wants us to return a directory entry offset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) * which later may be used to continue 'readdir()'ing the directory or to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) * 'seek()' to that specific direntry. Obviously UBIFS does not really fit this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) * model because directory entries are identified by keys, which may collide.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) * UBIFS uses directory entry hash value for directory offsets, so
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) * 'seekdir()'/'telldir()' may not always work because of possible key
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) * collisions. But UBIFS guarantees that consecutive 'readdir()' calls work
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) * properly by means of saving full directory entry name in the private field
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) * of the file description object.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) * This means that UBIFS cannot support NFS which requires full
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) * 'seekdir()'/'telldir()' support.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) static int ubifs_readdir(struct file *file, struct dir_context *ctx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) int fstr_real_len = 0, err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) struct fscrypt_name nm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) struct fscrypt_str fstr = {0};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) union ubifs_key key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) struct ubifs_dent_node *dent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) struct inode *dir = file_inode(file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) struct ubifs_info *c = dir->i_sb->s_fs_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) bool encrypted = IS_ENCRYPTED(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) dbg_gen("dir ino %lu, f_pos %#llx", dir->i_ino, ctx->pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) if (ctx->pos > UBIFS_S_KEY_HASH_MASK || ctx->pos == 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) * The directory was seek'ed to a senseless position or there
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) * are no more entries.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) if (encrypted) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) err = fscrypt_prepare_readdir(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) err = fscrypt_fname_alloc_buffer(UBIFS_MAX_NLEN, &fstr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) fstr_real_len = fstr.len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) if (file->f_version == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) * The file was seek'ed, which means that @file->private_data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) * is now invalid. This may also be just the first
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) * 'ubifs_readdir()' invocation, in which case
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) * @file->private_data is NULL, and the below code is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) * basically a no-op.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) kfree(file->private_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) file->private_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) * 'generic_file_llseek()' unconditionally sets @file->f_version to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) * zero, and we use this for detecting whether the file was seek'ed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) file->f_version = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) /* File positions 0 and 1 correspond to "." and ".." */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) if (ctx->pos < 2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) ubifs_assert(c, !file->private_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) if (!dir_emit_dots(file, ctx)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) if (encrypted)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) fscrypt_fname_free_buffer(&fstr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) /* Find the first entry in TNC and save it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) lowest_dent_key(c, &key, dir->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) fname_len(&nm) = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) dent = ubifs_tnc_next_ent(c, &key, &nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) if (IS_ERR(dent)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) err = PTR_ERR(dent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) ctx->pos = key_hash_flash(c, &dent->key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) file->private_data = dent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) dent = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) if (!dent) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) * The directory was seek'ed to and is now readdir'ed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) * Find the entry corresponding to @ctx->pos or the closest one.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) dent_key_init_hash(c, &key, dir->i_ino, ctx->pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) fname_len(&nm) = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) dent = ubifs_tnc_next_ent(c, &key, &nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) if (IS_ERR(dent)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) err = PTR_ERR(dent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) ctx->pos = key_hash_flash(c, &dent->key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) file->private_data = dent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) while (1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) dbg_gen("ino %llu, new f_pos %#x",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) (unsigned long long)le64_to_cpu(dent->inum),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) key_hash_flash(c, &dent->key));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) ubifs_assert(c, le64_to_cpu(dent->ch.sqnum) >
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) ubifs_inode(dir)->creat_sqnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) fname_len(&nm) = le16_to_cpu(dent->nlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) fname_name(&nm) = dent->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) if (encrypted) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) fstr.len = fstr_real_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) err = fscrypt_fname_disk_to_usr(dir, key_hash_flash(c,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) &dent->key),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) le32_to_cpu(dent->cookie),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) &nm.disk_name, &fstr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) fstr.len = fname_len(&nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) fstr.name = fname_name(&nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) if (!dir_emit(ctx, fstr.name, fstr.len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) le64_to_cpu(dent->inum),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) vfs_dent_type(dent->type))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) if (encrypted)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) fscrypt_fname_free_buffer(&fstr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) /* Switch to the next entry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) key_read(c, &dent->key, &key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) dent = ubifs_tnc_next_ent(c, &key, &nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) if (IS_ERR(dent)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) err = PTR_ERR(dent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) kfree(file->private_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) ctx->pos = key_hash_flash(c, &dent->key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) file->private_data = dent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) cond_resched();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) kfree(file->private_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) file->private_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) if (encrypted)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) fscrypt_fname_free_buffer(&fstr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) if (err != -ENOENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) ubifs_err(c, "cannot find next direntry, error %d", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) * -ENOENT is a non-fatal error in this context, the TNC uses
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) * it to indicate that the cursor moved past the current directory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) * and readdir() has to stop.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) /* 2 is a special value indicating that there are no more direntries */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) ctx->pos = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) /* Free saved readdir() state when the directory is closed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) static int ubifs_dir_release(struct inode *dir, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) kfree(file->private_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) file->private_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) * lock_2_inodes - a wrapper for locking two UBIFS inodes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) * @inode1: first inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) * @inode2: second inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) * We do not implement any tricks to guarantee strict lock ordering, because
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) * VFS has already done it for us on the @i_mutex. So this is just a simple
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) * wrapper function.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) static void lock_2_inodes(struct inode *inode1, struct inode *inode2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) mutex_lock_nested(&ubifs_inode(inode1)->ui_mutex, WB_MUTEX_1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) mutex_lock_nested(&ubifs_inode(inode2)->ui_mutex, WB_MUTEX_2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) * unlock_2_inodes - a wrapper for unlocking two UBIFS inodes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) * @inode1: first inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) * @inode2: second inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) static void unlock_2_inodes(struct inode *inode1, struct inode *inode2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) mutex_unlock(&ubifs_inode(inode2)->ui_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) mutex_unlock(&ubifs_inode(inode1)->ui_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) static int ubifs_link(struct dentry *old_dentry, struct inode *dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) struct dentry *dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) struct ubifs_info *c = dir->i_sb->s_fs_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) struct inode *inode = d_inode(old_dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) struct ubifs_inode *ui = ubifs_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) struct ubifs_inode *dir_ui = ubifs_inode(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) int err, sz_change = CALC_DENT_SIZE(dentry->d_name.len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) struct ubifs_budget_req req = { .new_dent = 1, .dirtied_ino = 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) .dirtied_ino_d = ALIGN(ui->data_len, 8) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) struct fscrypt_name nm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) * Budget request settings: new direntry, changing the target inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) * changing the parent inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) dbg_gen("dent '%pd' to ino %lu (nlink %d) in dir ino %lu",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) dentry, inode->i_ino,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) inode->i_nlink, dir->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) ubifs_assert(c, inode_is_locked(dir));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) ubifs_assert(c, inode_is_locked(inode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) err = fscrypt_prepare_link(old_dentry, dir, dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) err = dbg_check_synced_i_size(c, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) goto out_fname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) err = ubifs_budget_space(c, &req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) goto out_fname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) lock_2_inodes(dir, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) /* Handle O_TMPFILE corner case, it is allowed to link a O_TMPFILE. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) if (inode->i_nlink == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) ubifs_delete_orphan(c, inode->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) inc_nlink(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) ihold(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) inode->i_ctime = current_time(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) dir->i_size += sz_change;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) dir_ui->ui_size = dir->i_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) dir->i_mtime = dir->i_ctime = inode->i_ctime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) goto out_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) unlock_2_inodes(dir, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) ubifs_release_budget(c, &req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) d_instantiate(dentry, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) fscrypt_free_filename(&nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) out_cancel:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) dir->i_size -= sz_change;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) dir_ui->ui_size = dir->i_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) drop_nlink(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) if (inode->i_nlink == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) ubifs_add_orphan(c, inode->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) unlock_2_inodes(dir, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) ubifs_release_budget(c, &req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) iput(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) out_fname:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) fscrypt_free_filename(&nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) static int ubifs_unlink(struct inode *dir, struct dentry *dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) struct ubifs_info *c = dir->i_sb->s_fs_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) struct inode *inode = d_inode(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) struct ubifs_inode *dir_ui = ubifs_inode(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) int err, sz_change, budgeted = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) struct ubifs_budget_req req = { .mod_dent = 1, .dirtied_ino = 2 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) unsigned int saved_nlink = inode->i_nlink;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) struct fscrypt_name nm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) * Budget request settings: deletion direntry, deletion inode (+1 for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) * @dirtied_ino), changing the parent directory inode. If budgeting
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) * fails, go ahead anyway because we have extra space reserved for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) * deletions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) dbg_gen("dent '%pd' from ino %lu (nlink %d) in dir ino %lu",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) dentry, inode->i_ino,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) inode->i_nlink, dir->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) err = fscrypt_setup_filename(dir, &dentry->d_name, 1, &nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) err = ubifs_purge_xattrs(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) sz_change = CALC_DENT_SIZE(fname_len(&nm));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) ubifs_assert(c, inode_is_locked(dir));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) ubifs_assert(c, inode_is_locked(inode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) err = dbg_check_synced_i_size(c, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) goto out_fname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) err = ubifs_budget_space(c, &req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) if (err != -ENOSPC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) goto out_fname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) budgeted = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) lock_2_inodes(dir, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) inode->i_ctime = current_time(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) drop_nlink(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) dir->i_size -= sz_change;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) dir_ui->ui_size = dir->i_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) dir->i_mtime = dir->i_ctime = inode->i_ctime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) err = ubifs_jnl_update(c, dir, &nm, inode, 1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) goto out_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) unlock_2_inodes(dir, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) if (budgeted)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) ubifs_release_budget(c, &req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) /* We've deleted something - clean the "no space" flags */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) c->bi.nospace = c->bi.nospace_rp = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) smp_wmb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) fscrypt_free_filename(&nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) out_cancel:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) dir->i_size += sz_change;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) dir_ui->ui_size = dir->i_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) set_nlink(inode, saved_nlink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) unlock_2_inodes(dir, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) if (budgeted)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) ubifs_release_budget(c, &req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) out_fname:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) fscrypt_free_filename(&nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) * check_dir_empty - check if a directory is empty or not.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) * @dir: VFS inode object of the directory to check
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) * This function checks if directory @dir is empty. Returns zero if the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) * directory is empty, %-ENOTEMPTY if it is not, and other negative error codes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) * in case of of errors.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) int ubifs_check_dir_empty(struct inode *dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) struct ubifs_info *c = dir->i_sb->s_fs_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) struct fscrypt_name nm = { 0 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) struct ubifs_dent_node *dent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) union ubifs_key key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) lowest_dent_key(c, &key, dir->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) dent = ubifs_tnc_next_ent(c, &key, &nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) if (IS_ERR(dent)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) err = PTR_ERR(dent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) if (err == -ENOENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) kfree(dent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) err = -ENOTEMPTY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) static int ubifs_rmdir(struct inode *dir, struct dentry *dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) struct ubifs_info *c = dir->i_sb->s_fs_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) struct inode *inode = d_inode(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) int err, sz_change, budgeted = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) struct ubifs_inode *dir_ui = ubifs_inode(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) struct ubifs_budget_req req = { .mod_dent = 1, .dirtied_ino = 2 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) struct fscrypt_name nm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) * Budget request settings: deletion direntry, deletion inode and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) * changing the parent inode. If budgeting fails, go ahead anyway
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) * because we have extra space reserved for deletions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) dbg_gen("directory '%pd', ino %lu in dir ino %lu", dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) inode->i_ino, dir->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) ubifs_assert(c, inode_is_locked(dir));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) ubifs_assert(c, inode_is_locked(inode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) err = ubifs_check_dir_empty(d_inode(dentry));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) err = fscrypt_setup_filename(dir, &dentry->d_name, 1, &nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) err = ubifs_purge_xattrs(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) sz_change = CALC_DENT_SIZE(fname_len(&nm));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) err = ubifs_budget_space(c, &req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) if (err != -ENOSPC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) goto out_fname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) budgeted = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) lock_2_inodes(dir, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) inode->i_ctime = current_time(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) clear_nlink(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) drop_nlink(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) dir->i_size -= sz_change;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) dir_ui->ui_size = dir->i_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) dir->i_mtime = dir->i_ctime = inode->i_ctime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) err = ubifs_jnl_update(c, dir, &nm, inode, 1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) goto out_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) unlock_2_inodes(dir, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) if (budgeted)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) ubifs_release_budget(c, &req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) /* We've deleted something - clean the "no space" flags */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) c->bi.nospace = c->bi.nospace_rp = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) smp_wmb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) fscrypt_free_filename(&nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) out_cancel:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) dir->i_size += sz_change;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) dir_ui->ui_size = dir->i_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) inc_nlink(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) set_nlink(inode, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) unlock_2_inodes(dir, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) if (budgeted)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) ubifs_release_budget(c, &req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) out_fname:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) fscrypt_free_filename(&nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) static int ubifs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) struct ubifs_inode *dir_ui = ubifs_inode(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) struct ubifs_info *c = dir->i_sb->s_fs_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) int err, sz_change;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) struct fscrypt_name nm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) * Budget request settings: new inode, new direntry and changing parent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) * directory inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) dbg_gen("dent '%pd', mode %#hx in dir ino %lu",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) dentry, mode, dir->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) err = ubifs_budget_space(c, &req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) err = ubifs_prepare_create(dir, dentry, &nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) goto out_budg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) sz_change = CALC_DENT_SIZE(fname_len(&nm));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) inode = ubifs_new_inode(c, dir, S_IFDIR | mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) if (IS_ERR(inode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) err = PTR_ERR(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) goto out_fname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) err = ubifs_init_security(dir, inode, &dentry->d_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) goto out_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) mutex_lock(&dir_ui->ui_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) insert_inode_hash(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) inc_nlink(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) inc_nlink(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) dir->i_size += sz_change;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) dir_ui->ui_size = dir->i_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) dir->i_mtime = dir->i_ctime = inode->i_ctime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) ubifs_err(c, "cannot create directory, error %d", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) goto out_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) mutex_unlock(&dir_ui->ui_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) ubifs_release_budget(c, &req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) d_instantiate(dentry, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) fscrypt_free_filename(&nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) out_cancel:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) dir->i_size -= sz_change;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) dir_ui->ui_size = dir->i_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) drop_nlink(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) mutex_unlock(&dir_ui->ui_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) out_inode:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) make_bad_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) iput(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) out_fname:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) fscrypt_free_filename(&nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) out_budg:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) ubifs_release_budget(c, &req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) static int ubifs_mknod(struct inode *dir, struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) umode_t mode, dev_t rdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) struct ubifs_inode *ui;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) struct ubifs_inode *dir_ui = ubifs_inode(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) struct ubifs_info *c = dir->i_sb->s_fs_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) union ubifs_dev_desc *dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) int sz_change;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) int err, devlen = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) .dirtied_ino = 1 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) struct fscrypt_name nm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) * Budget request settings: new inode, new direntry and changing parent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) * directory inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) dbg_gen("dent '%pd' in dir ino %lu", dentry, dir->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) if (S_ISBLK(mode) || S_ISCHR(mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) dev = kmalloc(sizeof(union ubifs_dev_desc), GFP_NOFS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) if (!dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) devlen = ubifs_encode_dev(dev, rdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) req.new_ino_d = ALIGN(devlen, 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) err = ubifs_budget_space(c, &req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) kfree(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) err = ubifs_prepare_create(dir, dentry, &nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) kfree(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) goto out_budg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) sz_change = CALC_DENT_SIZE(fname_len(&nm));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) inode = ubifs_new_inode(c, dir, mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) if (IS_ERR(inode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) kfree(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) err = PTR_ERR(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) goto out_fname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) init_special_inode(inode, inode->i_mode, rdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) inode->i_size = ubifs_inode(inode)->ui_size = devlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) ui = ubifs_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) ui->data = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) ui->data_len = devlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) err = ubifs_init_security(dir, inode, &dentry->d_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) goto out_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) mutex_lock(&dir_ui->ui_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) dir->i_size += sz_change;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) dir_ui->ui_size = dir->i_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) dir->i_mtime = dir->i_ctime = inode->i_ctime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) goto out_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) mutex_unlock(&dir_ui->ui_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) ubifs_release_budget(c, &req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) insert_inode_hash(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) d_instantiate(dentry, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) fscrypt_free_filename(&nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) out_cancel:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) dir->i_size -= sz_change;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) dir_ui->ui_size = dir->i_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) mutex_unlock(&dir_ui->ui_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) out_inode:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) make_bad_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) iput(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) out_fname:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) fscrypt_free_filename(&nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) out_budg:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) ubifs_release_budget(c, &req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) static int ubifs_symlink(struct inode *dir, struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) const char *symname)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) struct ubifs_inode *ui;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) struct ubifs_inode *dir_ui = ubifs_inode(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) struct ubifs_info *c = dir->i_sb->s_fs_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) int err, sz_change, len = strlen(symname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) struct fscrypt_str disk_link;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) .new_ino_d = ALIGN(len, 8),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) .dirtied_ino = 1 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) struct fscrypt_name nm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) dbg_gen("dent '%pd', target '%s' in dir ino %lu", dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) symname, dir->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) err = fscrypt_prepare_symlink(dir, symname, len, UBIFS_MAX_INO_DATA,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) &disk_link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) * Budget request settings: new inode, new direntry and changing parent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) * directory inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) err = ubifs_budget_space(c, &req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) err = ubifs_prepare_create(dir, dentry, &nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) goto out_budg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) sz_change = CALC_DENT_SIZE(fname_len(&nm));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) inode = ubifs_new_inode(c, dir, S_IFLNK | S_IRWXUGO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) if (IS_ERR(inode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145) err = PTR_ERR(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) goto out_fname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149) ui = ubifs_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) ui->data = kmalloc(disk_link.len, GFP_NOFS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151) if (!ui->data) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) goto out_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) if (IS_ENCRYPTED(inode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) disk_link.name = ui->data; /* encrypt directly into ui->data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) err = fscrypt_encrypt_symlink(inode, symname, len, &disk_link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) goto out_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) memcpy(ui->data, disk_link.name, disk_link.len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) inode->i_link = ui->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) * The terminating zero byte is not written to the flash media and it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168) * is put just to make later in-memory string processing simpler. Thus,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) * data length is @disk_link.len - 1, not @disk_link.len.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171) ui->data_len = disk_link.len - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) inode->i_size = ubifs_inode(inode)->ui_size = disk_link.len - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174) err = ubifs_init_security(dir, inode, &dentry->d_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176) goto out_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178) mutex_lock(&dir_ui->ui_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179) dir->i_size += sz_change;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) dir_ui->ui_size = dir->i_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181) dir->i_mtime = dir->i_ctime = inode->i_ctime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182) err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) goto out_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185) mutex_unlock(&dir_ui->ui_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) insert_inode_hash(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188) d_instantiate(dentry, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) goto out_fname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192) out_cancel:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193) dir->i_size -= sz_change;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) dir_ui->ui_size = dir->i_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195) mutex_unlock(&dir_ui->ui_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196) out_inode:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) make_bad_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198) iput(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199) out_fname:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200) fscrypt_free_filename(&nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201) out_budg:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202) ubifs_release_budget(c, &req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207) * lock_4_inodes - a wrapper for locking three UBIFS inodes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208) * @inode1: first inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209) * @inode2: second inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210) * @inode3: third inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211) * @inode4: fouth inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213) * This function is used for 'ubifs_rename()' and @inode1 may be the same as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214) * @inode2 whereas @inode3 and @inode4 may be %NULL.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1215) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1216) * We do not implement any tricks to guarantee strict lock ordering, because
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217) * VFS has already done it for us on the @i_mutex. So this is just a simple
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218) * wrapper function.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220) static void lock_4_inodes(struct inode *inode1, struct inode *inode2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221) struct inode *inode3, struct inode *inode4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223) mutex_lock_nested(&ubifs_inode(inode1)->ui_mutex, WB_MUTEX_1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224) if (inode2 != inode1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225) mutex_lock_nested(&ubifs_inode(inode2)->ui_mutex, WB_MUTEX_2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226) if (inode3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227) mutex_lock_nested(&ubifs_inode(inode3)->ui_mutex, WB_MUTEX_3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228) if (inode4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229) mutex_lock_nested(&ubifs_inode(inode4)->ui_mutex, WB_MUTEX_4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233) * unlock_4_inodes - a wrapper for unlocking three UBIFS inodes for rename.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234) * @inode1: first inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235) * @inode2: second inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236) * @inode3: third inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237) * @inode4: fouth inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239) static void unlock_4_inodes(struct inode *inode1, struct inode *inode2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240) struct inode *inode3, struct inode *inode4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242) if (inode4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243) mutex_unlock(&ubifs_inode(inode4)->ui_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244) if (inode3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245) mutex_unlock(&ubifs_inode(inode3)->ui_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246) if (inode1 != inode2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247) mutex_unlock(&ubifs_inode(inode2)->ui_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248) mutex_unlock(&ubifs_inode(inode1)->ui_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251) static int do_rename(struct inode *old_dir, struct dentry *old_dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252) struct inode *new_dir, struct dentry *new_dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253) unsigned int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255) struct ubifs_info *c = old_dir->i_sb->s_fs_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256) struct inode *old_inode = d_inode(old_dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257) struct inode *new_inode = d_inode(new_dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258) struct inode *whiteout = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259) struct ubifs_inode *old_inode_ui = ubifs_inode(old_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260) struct ubifs_inode *whiteout_ui = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261) int err, release, sync = 0, move = (new_dir != old_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262) int is_dir = S_ISDIR(old_inode->i_mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263) int unlink = !!new_inode, new_sz, old_sz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264) struct ubifs_budget_req req = { .new_dent = 1, .mod_dent = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265) .dirtied_ino = 3 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266) struct ubifs_budget_req ino_req = { .dirtied_ino = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1267) .dirtied_ino_d = ALIGN(old_inode_ui->data_len, 8) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1268) struct timespec64 time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1269) unsigned int saved_nlink;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1270) struct fscrypt_name old_nm, new_nm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1272) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1273) * Budget request settings: deletion direntry, new direntry, removing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1274) * the old inode, and changing old and new parent directory inodes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1275) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1276) * However, this operation also marks the target inode as dirty and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1277) * does not write it, so we allocate budget for the target inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1278) * separately.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1279) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1281) dbg_gen("dent '%pd' ino %lu in dir ino %lu to dent '%pd' in dir ino %lu flags 0x%x",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1282) old_dentry, old_inode->i_ino, old_dir->i_ino,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1283) new_dentry, new_dir->i_ino, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1285) if (unlink) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1286) ubifs_assert(c, inode_is_locked(new_inode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1288) err = ubifs_purge_xattrs(new_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1289) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1290) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1291) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1293) if (unlink && is_dir) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1294) err = ubifs_check_dir_empty(new_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1295) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1296) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1297) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1299) err = fscrypt_setup_filename(old_dir, &old_dentry->d_name, 0, &old_nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1300) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1301) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1303) err = fscrypt_setup_filename(new_dir, &new_dentry->d_name, 0, &new_nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1304) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1305) fscrypt_free_filename(&old_nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1306) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1307) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1309) new_sz = CALC_DENT_SIZE(fname_len(&new_nm));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1310) old_sz = CALC_DENT_SIZE(fname_len(&old_nm));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1312) err = ubifs_budget_space(c, &req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1313) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1314) fscrypt_free_filename(&old_nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1315) fscrypt_free_filename(&new_nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1316) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1317) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1318) err = ubifs_budget_space(c, &ino_req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1319) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1320) fscrypt_free_filename(&old_nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1321) fscrypt_free_filename(&new_nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1322) ubifs_release_budget(c, &req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1323) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1324) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1325)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1326) if (flags & RENAME_WHITEOUT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1327) union ubifs_dev_desc *dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1328) struct ubifs_budget_req wht_req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1330) dev = kmalloc(sizeof(union ubifs_dev_desc), GFP_NOFS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1331) if (!dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1332) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1333) goto out_release;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1334) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1335)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1336) err = do_tmpfile(old_dir, old_dentry, S_IFCHR | WHITEOUT_MODE, &whiteout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1337) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1338) kfree(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1339) goto out_release;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1340) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1341)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1342) spin_lock(&whiteout->i_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1343) whiteout->i_state |= I_LINKABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1344) spin_unlock(&whiteout->i_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1345)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1346) whiteout_ui = ubifs_inode(whiteout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1347) whiteout_ui->data = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1348) whiteout_ui->data_len = ubifs_encode_dev(dev, MKDEV(0, 0));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1349) ubifs_assert(c, !whiteout_ui->dirty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1351) memset(&wht_req, 0, sizeof(struct ubifs_budget_req));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1352) wht_req.dirtied_ino = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1353) wht_req.dirtied_ino_d = ALIGN(whiteout_ui->data_len, 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1354) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1355) * To avoid deadlock between space budget (holds ui_mutex and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1356) * waits wb work) and writeback work(waits ui_mutex), do space
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1357) * budget before ubifs inodes locked.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1358) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1359) err = ubifs_budget_space(c, &wht_req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1360) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1361) iput(whiteout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1362) goto out_release;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1363) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1365) /* Add the old_dentry size to the old_dir size. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1366) old_sz -= CALC_DENT_SIZE(fname_len(&old_nm));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1367) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1368)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1369) lock_4_inodes(old_dir, new_dir, new_inode, whiteout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1371) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1372) * Like most other Unix systems, set the @i_ctime for inodes on a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1373) * rename.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1374) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1375) time = current_time(old_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1376) old_inode->i_ctime = time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1378) /* We must adjust parent link count when renaming directories */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1379) if (is_dir) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1380) if (move) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1381) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1382) * @old_dir loses a link because we are moving
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1383) * @old_inode to a different directory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1384) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1385) drop_nlink(old_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1386) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1387) * @new_dir only gains a link if we are not also
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1388) * overwriting an existing directory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1389) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1390) if (!unlink)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1391) inc_nlink(new_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1392) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1393) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1394) * @old_inode is not moving to a different directory,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1395) * but @old_dir still loses a link if we are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1396) * overwriting an existing directory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1397) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1398) if (unlink)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1399) drop_nlink(old_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1400) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1401) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1403) old_dir->i_size -= old_sz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1404) ubifs_inode(old_dir)->ui_size = old_dir->i_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1405) old_dir->i_mtime = old_dir->i_ctime = time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1406) new_dir->i_mtime = new_dir->i_ctime = time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1407)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1408) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1409) * And finally, if we unlinked a direntry which happened to have the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1410) * same name as the moved direntry, we have to decrement @i_nlink of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1411) * the unlinked inode and change its ctime.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1412) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1413) if (unlink) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1414) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1415) * Directories cannot have hard-links, so if this is a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1416) * directory, just clear @i_nlink.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1417) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1418) saved_nlink = new_inode->i_nlink;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1419) if (is_dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1420) clear_nlink(new_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1421) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1422) drop_nlink(new_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1423) new_inode->i_ctime = time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1424) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1425) new_dir->i_size += new_sz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1426) ubifs_inode(new_dir)->ui_size = new_dir->i_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1427) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1428)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1429) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1430) * Do not ask 'ubifs_jnl_rename()' to flush write-buffer if @old_inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1431) * is dirty, because this will be done later on at the end of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1432) * 'ubifs_rename()'.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1433) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1434) if (IS_SYNC(old_inode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1435) sync = IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1436) if (unlink && IS_SYNC(new_inode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1437) sync = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1438) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1439)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1440) if (whiteout) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1441) inc_nlink(whiteout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1442) mark_inode_dirty(whiteout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1443)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1444) spin_lock(&whiteout->i_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1445) whiteout->i_state &= ~I_LINKABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1446) spin_unlock(&whiteout->i_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1447)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1448) iput(whiteout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1449) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1450)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1451) err = ubifs_jnl_rename(c, old_dir, old_inode, &old_nm, new_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1452) new_inode, &new_nm, whiteout, sync);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1453) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1454) goto out_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1455)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1456) unlock_4_inodes(old_dir, new_dir, new_inode, whiteout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1457) ubifs_release_budget(c, &req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1458)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1459) mutex_lock(&old_inode_ui->ui_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1460) release = old_inode_ui->dirty;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1461) mark_inode_dirty_sync(old_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1462) mutex_unlock(&old_inode_ui->ui_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1463)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1464) if (release)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1465) ubifs_release_budget(c, &ino_req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1466) if (IS_SYNC(old_inode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1467) err = old_inode->i_sb->s_op->write_inode(old_inode, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1468)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1469) fscrypt_free_filename(&old_nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1470) fscrypt_free_filename(&new_nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1471) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1472)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1473) out_cancel:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1474) if (unlink) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1475) set_nlink(new_inode, saved_nlink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1476) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1477) new_dir->i_size -= new_sz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1478) ubifs_inode(new_dir)->ui_size = new_dir->i_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1479) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1480) old_dir->i_size += old_sz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1481) ubifs_inode(old_dir)->ui_size = old_dir->i_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1482) if (is_dir) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1483) if (move) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1484) inc_nlink(old_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1485) if (!unlink)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1486) drop_nlink(new_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1487) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1488) if (unlink)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1489) inc_nlink(old_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1490) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1491) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1492) if (whiteout) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1493) drop_nlink(whiteout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1494) iput(whiteout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1495) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1496) unlock_4_inodes(old_dir, new_dir, new_inode, whiteout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1497) out_release:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1498) ubifs_release_budget(c, &ino_req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1499) ubifs_release_budget(c, &req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1500) fscrypt_free_filename(&old_nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1501) fscrypt_free_filename(&new_nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1502) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1503) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1504)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1505) static int ubifs_xrename(struct inode *old_dir, struct dentry *old_dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1506) struct inode *new_dir, struct dentry *new_dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1507) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1508) struct ubifs_info *c = old_dir->i_sb->s_fs_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1509) struct ubifs_budget_req req = { .new_dent = 1, .mod_dent = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1510) .dirtied_ino = 2 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1511) int sync = IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1512) struct inode *fst_inode = d_inode(old_dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1513) struct inode *snd_inode = d_inode(new_dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1514) struct timespec64 time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1515) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1516) struct fscrypt_name fst_nm, snd_nm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1517)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1518) ubifs_assert(c, fst_inode && snd_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1519)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1520) err = fscrypt_setup_filename(old_dir, &old_dentry->d_name, 0, &fst_nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1521) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1522) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1523)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1524) err = fscrypt_setup_filename(new_dir, &new_dentry->d_name, 0, &snd_nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1525) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1526) fscrypt_free_filename(&fst_nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1527) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1528) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1529)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1530) lock_4_inodes(old_dir, new_dir, NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1531)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1532) time = current_time(old_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1533) fst_inode->i_ctime = time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1534) snd_inode->i_ctime = time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1535) old_dir->i_mtime = old_dir->i_ctime = time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1536) new_dir->i_mtime = new_dir->i_ctime = time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1537)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1538) if (old_dir != new_dir) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1539) if (S_ISDIR(fst_inode->i_mode) && !S_ISDIR(snd_inode->i_mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1540) inc_nlink(new_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1541) drop_nlink(old_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1542) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1543) else if (!S_ISDIR(fst_inode->i_mode) && S_ISDIR(snd_inode->i_mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1544) drop_nlink(new_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1545) inc_nlink(old_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1546) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1547) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1548)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1549) err = ubifs_jnl_xrename(c, old_dir, fst_inode, &fst_nm, new_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1550) snd_inode, &snd_nm, sync);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1551)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1552) unlock_4_inodes(old_dir, new_dir, NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1553) ubifs_release_budget(c, &req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1554)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1555) fscrypt_free_filename(&fst_nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1556) fscrypt_free_filename(&snd_nm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1557) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1558) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1559)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1560) static int ubifs_rename(struct inode *old_dir, struct dentry *old_dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1561) struct inode *new_dir, struct dentry *new_dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1562) unsigned int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1563) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1564) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1565) struct ubifs_info *c = old_dir->i_sb->s_fs_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1566)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1567) if (flags & ~(RENAME_NOREPLACE | RENAME_WHITEOUT | RENAME_EXCHANGE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1568) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1569)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1570) ubifs_assert(c, inode_is_locked(old_dir));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1571) ubifs_assert(c, inode_is_locked(new_dir));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1572)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1573) err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1574) flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1575) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1576) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1577)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1578) if (flags & RENAME_EXCHANGE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1579) return ubifs_xrename(old_dir, old_dentry, new_dir, new_dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1580)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1581) return do_rename(old_dir, old_dentry, new_dir, new_dentry, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1582) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1583)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1584) int ubifs_getattr(const struct path *path, struct kstat *stat,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1585) u32 request_mask, unsigned int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1586) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1587) loff_t size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1588) struct inode *inode = d_inode(path->dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1589) struct ubifs_inode *ui = ubifs_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1590)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1591) mutex_lock(&ui->ui_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1592)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1593) if (ui->flags & UBIFS_APPEND_FL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1594) stat->attributes |= STATX_ATTR_APPEND;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1595) if (ui->flags & UBIFS_COMPR_FL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1596) stat->attributes |= STATX_ATTR_COMPRESSED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1597) if (ui->flags & UBIFS_CRYPT_FL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1598) stat->attributes |= STATX_ATTR_ENCRYPTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1599) if (ui->flags & UBIFS_IMMUTABLE_FL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1600) stat->attributes |= STATX_ATTR_IMMUTABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1601)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1602) stat->attributes_mask |= (STATX_ATTR_APPEND |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1603) STATX_ATTR_COMPRESSED |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1604) STATX_ATTR_ENCRYPTED |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1605) STATX_ATTR_IMMUTABLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1606)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1607) generic_fillattr(inode, stat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1608) stat->blksize = UBIFS_BLOCK_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1609) stat->size = ui->ui_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1610)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1611) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1612) * Unfortunately, the 'stat()' system call was designed for block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1613) * device based file systems, and it is not appropriate for UBIFS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1614) * because UBIFS does not have notion of "block". For example, it is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1615) * difficult to tell how many block a directory takes - it actually
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1616) * takes less than 300 bytes, but we have to round it to block size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1617) * which introduces large mistake. This makes utilities like 'du' to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1618) * report completely senseless numbers. This is the reason why UBIFS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1619) * goes the same way as JFFS2 - it reports zero blocks for everything
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1620) * but regular files, which makes more sense than reporting completely
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1621) * wrong sizes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1622) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1623) if (S_ISREG(inode->i_mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1624) size = ui->xattr_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1625) size += stat->size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1626) size = ALIGN(size, UBIFS_BLOCK_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1627) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1628) * Note, user-space expects 512-byte blocks count irrespectively
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1629) * of what was reported in @stat->size.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1630) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1631) stat->blocks = size >> 9;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1632) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1633) stat->blocks = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1634) mutex_unlock(&ui->ui_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1635) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1636) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1637)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1638) const struct inode_operations ubifs_dir_inode_operations = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1639) .lookup = ubifs_lookup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1640) .create = ubifs_create,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1641) .link = ubifs_link,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1642) .symlink = ubifs_symlink,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1643) .unlink = ubifs_unlink,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1644) .mkdir = ubifs_mkdir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1645) .rmdir = ubifs_rmdir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1646) .mknod = ubifs_mknod,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1647) .rename = ubifs_rename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1648) .setattr = ubifs_setattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1649) .getattr = ubifs_getattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1650) #ifdef CONFIG_UBIFS_FS_XATTR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1651) .listxattr = ubifs_listxattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1652) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1653) .update_time = ubifs_update_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1654) .tmpfile = ubifs_tmpfile,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1655) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1656)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1657) const struct file_operations ubifs_dir_operations = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1658) .llseek = generic_file_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1659) .release = ubifs_dir_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1660) .read = generic_read_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1661) .iterate_shared = ubifs_readdir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1662) .fsync = ubifs_fsync,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1663) .unlocked_ioctl = ubifs_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1664) #ifdef CONFIG_COMPAT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1665) .compat_ioctl = ubifs_compat_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1666) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1667) };
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags