Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *  linux/fs/hpfs/dir.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *  Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *  directory VFS functions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include "hpfs_fn.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) static int hpfs_dir_release(struct inode *inode, struct file *filp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 	hpfs_lock(inode->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 	hpfs_del_pos(inode, &filp->f_pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 	/*hpfs_write_if_changed(inode);*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 	hpfs_unlock(inode->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) /* This is slow, but it's not used often */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) static loff_t hpfs_dir_lseek(struct file *filp, loff_t off, int whence)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	loff_t new_off = off + (whence == 1 ? filp->f_pos : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	loff_t pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	struct quad_buffer_head qbh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	struct inode *i = file_inode(filp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	struct super_block *s = i->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	/* Somebody else will have to figure out what to do here */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	if (whence == SEEK_DATA || whence == SEEK_HOLE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	inode_lock(i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	hpfs_lock(s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	/*pr_info("dir lseek\n");*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	if (new_off == 0 || new_off == 1 || new_off == 11 || new_off == 12 || new_off == 13) goto ok;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	pos = ((loff_t) hpfs_de_as_down_as_possible(s, hpfs_inode->i_dno) << 4) + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	while (pos != new_off) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 		if (map_pos_dirent(i, &pos, &qbh)) hpfs_brelse4(&qbh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 		else goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 		if (pos == 12) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	if (unlikely(hpfs_add_pos(i, &filp->f_pos) < 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 		hpfs_unlock(s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 		inode_unlock(i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) ok:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	filp->f_pos = new_off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	hpfs_unlock(s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	inode_unlock(i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	return new_off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	/*pr_warn("illegal lseek: %016llx\n", new_off);*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	hpfs_unlock(s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	inode_unlock(i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	return -ESPIPE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) static int hpfs_readdir(struct file *file, struct dir_context *ctx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	struct inode *inode = file_inode(file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	struct hpfs_inode_info *hpfs_inode = hpfs_i(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	struct quad_buffer_head qbh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	struct hpfs_dirent *de;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	int lc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	loff_t next_pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	unsigned char *tempname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	int c1, c2 = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	hpfs_lock(inode->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	if (hpfs_sb(inode->i_sb)->sb_chk) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 		if (hpfs_chk_sectors(inode->i_sb, inode->i_ino, 1, "dir_fnode")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 			ret = -EFSERROR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 			goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 		if (hpfs_chk_sectors(inode->i_sb, hpfs_inode->i_dno, 4, "dir_dnode")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 			ret = -EFSERROR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 			goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	if (hpfs_sb(inode->i_sb)->sb_chk >= 2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 		struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 		struct fnode *fno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 		int e = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 		if (!(fno = hpfs_map_fnode(inode->i_sb, inode->i_ino, &bh))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 			ret = -EIOERROR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 			goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 		if (!fnode_is_dir(fno)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 			e = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 			hpfs_error(inode->i_sb, "not a directory, fnode %08lx",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 					(unsigned long)inode->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		if (hpfs_inode->i_dno != le32_to_cpu(fno->u.external[0].disk_secno)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 			e = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 			hpfs_error(inode->i_sb, "corrupted inode: i_dno == %08x, fnode -> dnode == %08x", hpfs_inode->i_dno, le32_to_cpu(fno->u.external[0].disk_secno));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 		if (e) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 			ret = -EFSERROR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 			goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	lc = hpfs_sb(inode->i_sb)->sb_lowercase;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	if (ctx->pos == 12) { /* diff -r requires this (note, that diff -r */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 		ctx->pos = 13; /* also fails on msdos filesystem in 2.0) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	if (ctx->pos == 13) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		ret = -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	while (1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 		again:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		/* This won't work when cycle is longer than number of dirents
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		   accepted by filldir, but what can I do?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 		   maybe killall -9 ls helps */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		if (hpfs_sb(inode->i_sb)->sb_chk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 			if (hpfs_stop_cycles(inode->i_sb, ctx->pos, &c1, &c2, "hpfs_readdir")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 				ret = -EFSERROR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 				goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 		if (ctx->pos == 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 			goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		if (ctx->pos == 3 || ctx->pos == 4 || ctx->pos == 5) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 			pr_err("pos==%d\n", (int)ctx->pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 			goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 		if (ctx->pos == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 			if (!dir_emit_dot(file, ctx))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 				goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 			ctx->pos = 11;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		if (ctx->pos == 11) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 			if (!dir_emit(ctx, "..", 2, hpfs_inode->i_parent_dir, DT_DIR))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 				goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 			ctx->pos = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		if (ctx->pos == 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 			ret = hpfs_add_pos(inode, &file->f_pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 			if (unlikely(ret < 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 				goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 			ctx->pos = ((loff_t) hpfs_de_as_down_as_possible(inode->i_sb, hpfs_inode->i_dno) << 4) + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 		next_pos = ctx->pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		if (!(de = map_pos_dirent(inode, &next_pos, &qbh))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 			ctx->pos = next_pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 			ret = -EIOERROR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 			goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 		if (de->first || de->last) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 			if (hpfs_sb(inode->i_sb)->sb_chk) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 				if (de->first && !de->last && (de->namelen != 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 				    || de ->name[0] != 1 || de->name[1] != 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 					hpfs_error(inode->i_sb, "hpfs_readdir: bad ^A^A entry; pos = %08lx", (unsigned long)ctx->pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 				if (de->last && (de->namelen != 1 || de ->name[0] != 255))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 					hpfs_error(inode->i_sb, "hpfs_readdir: bad \\377 entry; pos = %08lx", (unsigned long)ctx->pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 			hpfs_brelse4(&qbh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 			ctx->pos = next_pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 			goto again;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		tempname = hpfs_translate_name(inode->i_sb, de->name, de->namelen, lc, de->not_8x3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		if (!dir_emit(ctx, tempname, de->namelen, le32_to_cpu(de->fnode), DT_UNKNOWN)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 			if (tempname != de->name) kfree(tempname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 			hpfs_brelse4(&qbh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 			goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		ctx->pos = next_pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		if (tempname != de->name) kfree(tempname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 		hpfs_brelse4(&qbh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	hpfs_unlock(inode->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)  * lookup.  Search the specified directory for the specified name, set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)  * *result to the corresponding inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)  * lookup uses the inode number to tell read_inode whether it is reading
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)  * the inode of a directory or a file -- file ino's are odd, directory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)  * ino's are even.  read_inode avoids i/o for file inodes; everything
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)  * needed is up here in the directory.  (And file fnodes are out in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)  * the boondocks.)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)  *    - M.P.: this is over, sometimes we've got to read file's fnode for eas
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)  *	      inode numbers are just fnode sector numbers; iget lock is used
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)  *	      to tell read_inode to read fnode or not.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) struct dentry *hpfs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	const unsigned char *name = dentry->d_name.name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	unsigned len = dentry->d_name.len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	struct quad_buffer_head qbh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	struct hpfs_dirent *de;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	ino_t ino;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	struct inode *result = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	struct hpfs_inode_info *hpfs_result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	hpfs_lock(dir->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	if ((err = hpfs_chk_name(name, &len))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		if (err == -ENAMETOOLONG) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 			hpfs_unlock(dir->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 			return ERR_PTR(-ENAMETOOLONG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 		goto end_add;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	}
^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) 	 * '.' and '..' will never be passed here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	de = map_dirent(dir, hpfs_i(dir)->i_dno, name, len, NULL, &qbh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	 * This is not really a bailout, just means file not found.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	if (!de) goto end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	 * Get inode number, what we're after.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	ino = le32_to_cpu(de->fnode);
^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) 	 * Go find or make an inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	result = iget_locked(dir->i_sb, ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	if (!result) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 		hpfs_error(dir->i_sb, "hpfs_lookup: can't get inode");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 		result = ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 		goto bail1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	if (result->i_state & I_NEW) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 		hpfs_init_inode(result);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 		if (de->directory)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 			hpfs_read_inode(result);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 		else if (le32_to_cpu(de->ea_size) && hpfs_sb(dir->i_sb)->sb_eas)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 			hpfs_read_inode(result);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 		else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 			result->i_mode |= S_IFREG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 			result->i_mode &= ~0111;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 			result->i_op = &hpfs_file_iops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 			result->i_fop = &hpfs_file_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 			set_nlink(result, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 		unlock_new_inode(result);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	hpfs_result = hpfs_i(result);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	if (!de->directory) hpfs_result->i_parent_dir = dir->i_ino;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	if (de->has_acl || de->has_xtd_perm) if (!sb_rdonly(dir->i_sb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 		hpfs_error(result->i_sb, "ACLs or XPERM found. This is probably HPFS386. This driver doesn't support it now. Send me some info on these structures");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 		iput(result);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 		result = ERR_PTR(-EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 		goto bail1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	 * Fill in the info from the directory if this is a newly created
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	 * inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	if (!result->i_ctime.tv_sec) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 		if (!(result->i_ctime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(de->creation_date))))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 			result->i_ctime.tv_sec = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 		result->i_ctime.tv_nsec = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 		result->i_mtime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(de->write_date));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 		result->i_mtime.tv_nsec = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 		result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(de->read_date));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 		result->i_atime.tv_nsec = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 		hpfs_result->i_ea_size = le32_to_cpu(de->ea_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 		if (!hpfs_result->i_ea_mode && de->read_only)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 			result->i_mode &= ~0222;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 		if (!de->directory) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 			if (result->i_size == -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 				result->i_size = le32_to_cpu(de->file_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 				result->i_data.a_ops = &hpfs_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 				hpfs_i(result)->mmu_private = result->i_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 			/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 			 * i_blocks should count the fnode and any anodes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 			 * We count 1 for the fnode and don't bother about
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 			 * anodes -- the disk heads are on the directory band
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 			 * and we want them to stay there.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 			 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 				result->i_blocks = 1 + ((result->i_size + 511) >> 9);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) bail1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	hpfs_brelse4(&qbh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	 * Made it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) end:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) end_add:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	hpfs_unlock(dir->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	return d_splice_alias(result, dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) const struct file_operations hpfs_dir_ops =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	.llseek		= hpfs_dir_lseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	.read		= generic_read_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 	.iterate_shared	= hpfs_readdir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	.release	= hpfs_dir_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	.fsync		= hpfs_file_fsync,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	.unlocked_ioctl	= hpfs_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	.compat_ioctl	= compat_ptr_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) };