Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: MIT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * VirtualBox Guest Shared Folders support: Utility functions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * Mainly conversion from/to VirtualBox/Linux data structures.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Copyright (C) 2006-2018 Oracle Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/namei.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/nls.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/sizes.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/vfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include "vfsmod.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) struct inode *vboxsf_new_inode(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 	struct vboxsf_sbi *sbi = VBOXSF_SBI(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 	struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 	int cursor, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 	u32 gen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 	inode = new_inode(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	if (!inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 		return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	idr_preload(GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	spin_lock_irqsave(&sbi->ino_idr_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	cursor = idr_get_cursor(&sbi->ino_idr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	ret = idr_alloc_cyclic(&sbi->ino_idr, inode, 1, 0, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	if (ret >= 0 && ret < cursor)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 		sbi->next_generation++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	gen = sbi->next_generation;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	spin_unlock_irqrestore(&sbi->ino_idr_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	idr_preload_end();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 		iput(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 		return ERR_PTR(ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	inode->i_ino = ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	inode->i_generation = gen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	return inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) /* set [inode] attributes based on [info], uid/gid based on [sbi] */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) void vboxsf_init_inode(struct vboxsf_sbi *sbi, struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 		       const struct shfl_fsobjinfo *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	const struct shfl_fsobjattr *attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	s64 allocated;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	int mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	attr = &info->attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) #define mode_set(r) ((attr->mode & (SHFL_UNIX_##r)) ? (S_##r) : 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	mode = mode_set(IRUSR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	mode |= mode_set(IWUSR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	mode |= mode_set(IXUSR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	mode |= mode_set(IRGRP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	mode |= mode_set(IWGRP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	mode |= mode_set(IXGRP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	mode |= mode_set(IROTH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	mode |= mode_set(IWOTH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	mode |= mode_set(IXOTH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) #undef mode_set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	/* We use the host-side values for these */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	inode->i_flags |= S_NOATIME | S_NOCMTIME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	inode->i_mapping->a_ops = &vboxsf_reg_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	if (SHFL_IS_DIRECTORY(attr->mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 		inode->i_mode = sbi->o.dmode_set ? sbi->o.dmode : mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 		inode->i_mode &= ~sbi->o.dmask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 		inode->i_mode |= S_IFDIR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 		inode->i_op = &vboxsf_dir_iops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		inode->i_fop = &vboxsf_dir_fops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 		 * XXX: this probably should be set to the number of entries
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 		 * in the directory plus two (. ..)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		set_nlink(inode, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	} else if (SHFL_IS_SYMLINK(attr->mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 		inode->i_mode = sbi->o.fmode_set ? sbi->o.fmode : mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 		inode->i_mode &= ~sbi->o.fmask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 		inode->i_mode |= S_IFLNK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 		inode->i_op = &vboxsf_lnk_iops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 		set_nlink(inode, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		inode->i_mode = sbi->o.fmode_set ? sbi->o.fmode : mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 		inode->i_mode &= ~sbi->o.fmask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 		inode->i_mode |= S_IFREG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 		inode->i_op = &vboxsf_reg_iops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		inode->i_fop = &vboxsf_reg_fops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		set_nlink(inode, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	inode->i_uid = sbi->o.uid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	inode->i_gid = sbi->o.gid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	inode->i_size = info->size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	inode->i_blkbits = 12;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	/* i_blocks always in units of 512 bytes! */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	allocated = info->allocated + 511;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	do_div(allocated, 512);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	inode->i_blocks = allocated;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	inode->i_atime = ns_to_timespec64(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 				 info->access_time.ns_relative_to_unix_epoch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	inode->i_ctime = ns_to_timespec64(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 				 info->change_time.ns_relative_to_unix_epoch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	inode->i_mtime = ns_to_timespec64(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 			   info->modification_time.ns_relative_to_unix_epoch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) int vboxsf_create_at_dentry(struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 			    struct shfl_createparms *params)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	struct vboxsf_sbi *sbi = VBOXSF_SBI(dentry->d_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	struct shfl_string *path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	path = vboxsf_path_from_dentry(sbi, dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	if (IS_ERR(path))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 		return PTR_ERR(path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	err = vboxsf_create(sbi->root, path, params);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	__putname(path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) int vboxsf_stat(struct vboxsf_sbi *sbi, struct shfl_string *path,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		struct shfl_fsobjinfo *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	struct shfl_createparms params = {};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	params.handle = SHFL_HANDLE_NIL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	params.create_flags = SHFL_CF_LOOKUP | SHFL_CF_ACT_FAIL_IF_NEW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	err = vboxsf_create(sbi->root, path, &params);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	if (params.result != SHFL_FILE_EXISTS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 		return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	if (info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		*info = params.info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) int vboxsf_stat_dentry(struct dentry *dentry, struct shfl_fsobjinfo *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	struct vboxsf_sbi *sbi = VBOXSF_SBI(dentry->d_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	struct shfl_string *path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	path = vboxsf_path_from_dentry(sbi, dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	if (IS_ERR(path))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		return PTR_ERR(path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	err = vboxsf_stat(sbi, path, info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	__putname(path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) int vboxsf_inode_revalidate(struct dentry *dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	struct vboxsf_sbi *sbi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	struct vboxsf_inode *sf_i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	struct shfl_fsobjinfo info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	struct timespec64 prev_mtime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	if (!dentry || !d_really_is_positive(dentry))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	inode = d_inode(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	prev_mtime = inode->i_mtime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	sf_i = VBOXSF_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	sbi = VBOXSF_SBI(dentry->d_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	if (!sf_i->force_restat) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		if (time_before(jiffies, dentry->d_time + sbi->o.ttl))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 			return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	err = vboxsf_stat_dentry(dentry, &info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	dentry->d_time = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	sf_i->force_restat = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	vboxsf_init_inode(sbi, inode, &info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	 * If the file was changed on the host side we need to invalidate the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	 * page-cache for it.  Note this also gets triggered by our own writes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	 * this is unavoidable.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	if (timespec64_compare(&inode->i_mtime, &prev_mtime) > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		invalidate_inode_pages2(inode->i_mapping);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) int vboxsf_getattr(const struct path *path, struct kstat *kstat,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 		   u32 request_mask, unsigned int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	struct dentry *dentry = path->dentry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	struct inode *inode = d_inode(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	struct vboxsf_inode *sf_i = VBOXSF_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	switch (flags & AT_STATX_SYNC_TYPE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	case AT_STATX_DONT_SYNC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	case AT_STATX_FORCE_SYNC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 		sf_i->force_restat = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 		fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 		err = vboxsf_inode_revalidate(dentry);
^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) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	generic_fillattr(d_inode(dentry), kstat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) int vboxsf_setattr(struct dentry *dentry, struct iattr *iattr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	struct vboxsf_inode *sf_i = VBOXSF_I(d_inode(dentry));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	struct vboxsf_sbi *sbi = VBOXSF_SBI(dentry->d_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	struct shfl_createparms params = {};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	struct shfl_fsobjinfo info = {};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	u32 buf_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	params.handle = SHFL_HANDLE_NIL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	params.create_flags = SHFL_CF_ACT_OPEN_IF_EXISTS |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 			      SHFL_CF_ACT_FAIL_IF_NEW |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 			      SHFL_CF_ACCESS_ATTR_WRITE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	/* this is at least required for Posix hosts */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	if (iattr->ia_valid & ATTR_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 		params.create_flags |= SHFL_CF_ACCESS_WRITE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	err = vboxsf_create_at_dentry(dentry, &params);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	if (err || params.result != SHFL_FILE_EXISTS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 		return err ? err : -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) #define mode_set(r) ((iattr->ia_mode & (S_##r)) ? SHFL_UNIX_##r : 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	 * Setting the file size and setting the other attributes has to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	 * be handled separately.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	if (iattr->ia_valid & (ATTR_MODE | ATTR_ATIME | ATTR_MTIME)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 		if (iattr->ia_valid & ATTR_MODE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 			info.attr.mode = mode_set(IRUSR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 			info.attr.mode |= mode_set(IWUSR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 			info.attr.mode |= mode_set(IXUSR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 			info.attr.mode |= mode_set(IRGRP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 			info.attr.mode |= mode_set(IWGRP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 			info.attr.mode |= mode_set(IXGRP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 			info.attr.mode |= mode_set(IROTH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 			info.attr.mode |= mode_set(IWOTH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 			info.attr.mode |= mode_set(IXOTH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 			if (iattr->ia_mode & S_IFDIR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 				info.attr.mode |= SHFL_TYPE_DIRECTORY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 			else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 				info.attr.mode |= SHFL_TYPE_FILE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 		if (iattr->ia_valid & ATTR_ATIME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 			info.access_time.ns_relative_to_unix_epoch =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 					    timespec64_to_ns(&iattr->ia_atime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 		if (iattr->ia_valid & ATTR_MTIME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 			info.modification_time.ns_relative_to_unix_epoch =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 					    timespec64_to_ns(&iattr->ia_mtime);
^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) 		 * Ignore ctime (inode change time) as it can't be set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 		 * from userland anyway.
^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) 		buf_len = sizeof(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 		err = vboxsf_fsinfo(sbi->root, params.handle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 				    SHFL_INFO_SET | SHFL_INFO_FILE, &buf_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 				    &info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 		if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 			vboxsf_close(sbi->root, params.handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 			return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 		/* the host may have given us different attr then requested */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 		sf_i->force_restat = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) #undef mode_set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	if (iattr->ia_valid & ATTR_SIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 		memset(&info, 0, sizeof(info));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 		info.size = iattr->ia_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 		buf_len = sizeof(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 		err = vboxsf_fsinfo(sbi->root, params.handle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 				    SHFL_INFO_SET | SHFL_INFO_SIZE, &buf_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 				    &info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 		if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 			vboxsf_close(sbi->root, params.handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 			return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 		/* the host may have given us different attr then requested */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 		sf_i->force_restat = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 	vboxsf_close(sbi->root, params.handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	/* Update the inode with what the host has actually given us. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	if (sf_i->force_restat)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 		vboxsf_inode_revalidate(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)  * [dentry] contains string encoded in coding system that corresponds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341)  * to [sbi]->nls, we must convert it to UTF8 here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342)  * Returns a shfl_string allocated through __getname (must be freed using
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343)  * __putname), or an ERR_PTR on error.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) struct shfl_string *vboxsf_path_from_dentry(struct vboxsf_sbi *sbi,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 					    struct dentry *dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 	struct shfl_string *shfl_path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 	int path_len, out_len, nb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 	char *buf, *path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	wchar_t uni;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	u8 *out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 	buf = __getname();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 	if (!buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 		return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 	path = dentry_path_raw(dentry, buf, PATH_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 	if (IS_ERR(path)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 		__putname(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 		return ERR_CAST(path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 	path_len = strlen(path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 	if (sbi->nls) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 		shfl_path = __getname();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 		if (!shfl_path) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 			__putname(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 			return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 		out = shfl_path->string.utf8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 		out_len = PATH_MAX - SHFLSTRING_HEADER_SIZE - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 		while (path_len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 			nb = sbi->nls->char2uni(path, path_len, &uni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 			if (nb < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 				__putname(shfl_path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 				__putname(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 				return ERR_PTR(-EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 			path += nb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 			path_len -= nb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 			nb = utf32_to_utf8(uni, out, out_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 			if (nb < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 				__putname(shfl_path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 				__putname(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 				return ERR_PTR(-ENAMETOOLONG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 			out += nb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) 			out_len -= nb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 		*out = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 		shfl_path->length = out - shfl_path->string.utf8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 		shfl_path->size = shfl_path->length + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 		__putname(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 		if ((SHFLSTRING_HEADER_SIZE + path_len + 1) > PATH_MAX) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) 			__putname(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) 			return ERR_PTR(-ENAMETOOLONG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) 		 * dentry_path stores the name at the end of buf, but the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) 		 * shfl_string string we return must be properly aligned.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) 		shfl_path = (struct shfl_string *)buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) 		memmove(shfl_path->string.utf8, path, path_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) 		shfl_path->string.utf8[path_len] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) 		shfl_path->length = path_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) 		shfl_path->size = path_len + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) 	return shfl_path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) int vboxsf_nlscpy(struct vboxsf_sbi *sbi, char *name, size_t name_bound_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) 		  const unsigned char *utf8_name, size_t utf8_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) 	const char *in;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) 	char *out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) 	size_t out_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) 	size_t out_bound_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) 	size_t in_bound_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) 	in = utf8_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) 	in_bound_len = utf8_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) 	out = name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) 	out_len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) 	/* Reserve space for terminating 0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) 	out_bound_len = name_bound_len - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) 	while (in_bound_len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) 		int nb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) 		unicode_t uni;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) 		nb = utf8_to_utf32(in, in_bound_len, &uni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) 		if (nb < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) 			return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) 		in += nb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) 		in_bound_len -= nb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) 		nb = sbi->nls->uni2char(uni, out, out_bound_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) 		if (nb < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) 			return nb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) 		out += nb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) 		out_bound_len -= nb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) 		out_len += nb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) 	*out = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) static struct vboxsf_dir_buf *vboxsf_dir_buf_alloc(struct list_head *list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) 	struct vboxsf_dir_buf *b;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) 	b = kmalloc(sizeof(*b), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) 	if (!b)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) 	b->buf = kmalloc(DIR_BUFFER_SIZE, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) 	if (!b->buf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) 		kfree(b);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) 	b->entries = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) 	b->used = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) 	b->free = DIR_BUFFER_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) 	list_add(&b->head, list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) 	return b;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) static void vboxsf_dir_buf_free(struct vboxsf_dir_buf *b)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) 	list_del(&b->head);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) 	kfree(b->buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) 	kfree(b);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) struct vboxsf_dir_info *vboxsf_dir_info_alloc(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) 	struct vboxsf_dir_info *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) 	p = kmalloc(sizeof(*p), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) 	if (!p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) 	INIT_LIST_HEAD(&p->info_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) 	return p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) void vboxsf_dir_info_free(struct vboxsf_dir_info *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) 	struct list_head *list, *pos, *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) 	list = &p->info_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) 	list_for_each_safe(pos, tmp, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) 		struct vboxsf_dir_buf *b;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) 		b = list_entry(pos, struct vboxsf_dir_buf, head);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) 		vboxsf_dir_buf_free(b);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) 	kfree(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) int vboxsf_dir_read_all(struct vboxsf_sbi *sbi, struct vboxsf_dir_info *sf_d,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) 			u64 handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) 	struct vboxsf_dir_buf *b;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) 	u32 entries, size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) 	int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) 	void *buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) 	/* vboxsf_dirinfo returns 1 on end of dir */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) 	while (err == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) 		b = vboxsf_dir_buf_alloc(&sf_d->info_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) 		if (!b) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) 			err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) 		buf = b->buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) 		size = b->free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) 		err = vboxsf_dirinfo(sbi->root, handle, NULL, 0, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) 				     &size, buf, &entries);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) 		if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) 		b->entries += entries;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) 		b->free -= size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) 		b->used += size;
^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) 	if (b && b->used == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) 		vboxsf_dir_buf_free(b);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) 	/* -EILSEQ means the host could not translate a filename, ignore */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) 	if (err > 0 || err == -EILSEQ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) 		err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) }