Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2)  * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include "reiserfs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/buffer_head.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) extern const struct reiserfs_key MIN_KEY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) static int reiserfs_readdir(struct file *, struct dir_context *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) static int reiserfs_dir_fsync(struct file *filp, loff_t start, loff_t end,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 			      int datasync);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) const struct file_operations reiserfs_dir_operations = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 	.llseek = generic_file_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 	.read = generic_read_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 	.iterate_shared = reiserfs_readdir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	.fsync = reiserfs_dir_fsync,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	.unlocked_ioctl = reiserfs_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #ifdef CONFIG_COMPAT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	.compat_ioctl = reiserfs_compat_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #endif
^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) static int reiserfs_dir_fsync(struct file *filp, loff_t start, loff_t end,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 			      int datasync)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	struct inode *inode = filp->f_mapping->host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	err = file_write_and_wait_range(filp, start, end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	inode_lock(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	reiserfs_write_lock(inode->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	err = reiserfs_commit_for_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	reiserfs_write_unlock(inode->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	inode_unlock(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) #define store_ih(where,what) copy_item_head (where, what)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) static inline bool is_privroot_deh(struct inode *dir, struct reiserfs_de_head *deh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	struct dentry *privroot = REISERFS_SB(dir->i_sb)->priv_root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	return (d_really_is_positive(privroot) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	        deh->deh_objectid == INODE_PKEY(d_inode(privroot))->k_objectid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) int reiserfs_readdir_inode(struct inode *inode, struct dir_context *ctx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	/* key of current position in the directory (key of directory entry) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	struct cpu_key pos_key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	INITIALIZE_PATH(path_to_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	int item_num, entry_num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	const struct reiserfs_key *rkey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	struct item_head *ih, tmp_ih;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	int search_res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	char *local_buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	loff_t next_pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	char small_buf[32];	/* avoid kmalloc if we can */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	struct reiserfs_dir_entry de;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	int depth;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	reiserfs_write_lock(inode->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	reiserfs_check_lock_depth(inode->i_sb, "readdir");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	 * form key for search the next directory entry using
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	 * f_pos field of file structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	make_cpu_key(&pos_key, inode, ctx->pos ?: DOT_OFFSET, TYPE_DIRENTRY, 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	next_pos = cpu_key_k_offset(&pos_key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	path_to_entry.reada = PATH_READA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	while (1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) research:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 		 * search the directory item, containing entry with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		 * specified key
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 		search_res =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 		    search_by_entry_key(inode->i_sb, &pos_key, &path_to_entry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 					&de);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		if (search_res == IO_ERROR) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 			/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 			 * FIXME: we could just skip part of directory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 			 * which could not be read
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 			 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 			ret = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 			goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 		entry_num = de.de_entry_num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 		bh = de.de_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 		item_num = de.de_item_num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 		ih = de.de_ih;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 		store_ih(&tmp_ih, ih);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 		/* we must have found item, that is item of this directory, */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 		RFALSE(COMP_SHORT_KEYS(&ih->ih_key, &pos_key),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		       "vs-9000: found item %h does not match to dir we readdir %K",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 		       ih, &pos_key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		RFALSE(item_num > B_NR_ITEMS(bh) - 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		       "vs-9005 item_num == %d, item amount == %d",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 		       item_num, B_NR_ITEMS(bh));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 		 * and entry must be not more than number of entries
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		 * in the item
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 		RFALSE(ih_entry_count(ih) < entry_num,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		       "vs-9010: entry number is too big %d (%d)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 		       entry_num, ih_entry_count(ih));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 		 * go through all entries in the directory item beginning
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 		 * from the entry, that has been found
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		if (search_res == POSITION_FOUND
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 		    || entry_num < ih_entry_count(ih)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 			struct reiserfs_de_head *deh =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 			    B_I_DEH(bh, ih) + entry_num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 			for (; entry_num < ih_entry_count(ih);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 			     entry_num++, deh++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 				int d_reclen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 				char *d_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 				ino_t d_ino;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 				loff_t cur_pos = deh_offset(deh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 				/* it is hidden entry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 				if (!de_visible(deh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 					continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 				d_reclen = entry_length(bh, ih, entry_num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 				d_name = B_I_DEH_ENTRY_FILE_NAME(bh, ih, deh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 				if (d_reclen <= 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 				    d_name + d_reclen > bh->b_data + bh->b_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 					/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 					 * There is corrupted data in entry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 					 * We'd better stop here
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 					 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 					pathrelse(&path_to_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 					ret = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 					goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 				}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 				if (!d_name[d_reclen - 1])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 					d_reclen = strlen(d_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 				/* too big to send back to VFS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 				if (d_reclen >
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 				    REISERFS_MAX_NAME(inode->i_sb->
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 						      s_blocksize)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 					continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 				}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 				/* Ignore the .reiserfs_priv entry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 				if (is_privroot_deh(inode, deh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 					continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 				ctx->pos = deh_offset(deh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 				d_ino = deh_objectid(deh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 				if (d_reclen <= 32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 					local_buf = small_buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 				} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 					local_buf = kmalloc(d_reclen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 							    GFP_NOFS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 					if (!local_buf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 						pathrelse(&path_to_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 						ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 						goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 					}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 					if (item_moved(&tmp_ih, &path_to_entry)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 						kfree(local_buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 						goto research;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 					}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 				}
^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) 				 * Note, that we copy name to user space via
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 				 * temporary buffer (local_buf) because
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 				 * filldir will block if user space buffer is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 				 * swapped out. At that time entry can move to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 				 * somewhere else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 				 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 				memcpy(local_buf, d_name, d_reclen);
^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) 				 * Since filldir might sleep, we can release
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 				 * the write lock here for other waiters
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 				 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 				depth = reiserfs_write_unlock_nested(inode->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 				if (!dir_emit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 				    (ctx, local_buf, d_reclen, d_ino,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 				     DT_UNKNOWN)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 					reiserfs_write_lock_nested(inode->i_sb, depth);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 					if (local_buf != small_buf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 						kfree(local_buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 					}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 					goto end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 				}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 				reiserfs_write_lock_nested(inode->i_sb, depth);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 				if (local_buf != small_buf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 					kfree(local_buf);
^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) 				/* deh_offset(deh) may be invalid now. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 				next_pos = cur_pos + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 				if (item_moved(&tmp_ih, &path_to_entry)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 					set_cpu_key_k_offset(&pos_key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 							     next_pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 					goto research;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 				}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 			}	/* for */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 		/* end of directory has been reached */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 		if (item_num != B_NR_ITEMS(bh) - 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 			goto end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 		 * item we went through is last item of node. Using right
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 		 * delimiting key check is it directory end
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 		rkey = get_rkey(&path_to_entry, inode->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 		if (!comp_le_keys(rkey, &MIN_KEY)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 			/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 			 * set pos_key to key, that is the smallest and greater
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 			 * that key of the last entry in the item
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 			 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 			set_cpu_key_k_offset(&pos_key, next_pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 		/* end of directory has been reached */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 		if (COMP_SHORT_KEYS(rkey, &pos_key)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 			goto end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 		/* directory continues in the right neighboring block */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 		set_cpu_key_k_offset(&pos_key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 				     le_key_k_offset(KEY_FORMAT_3_5, rkey));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	}			/* while */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) end:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	ctx->pos = next_pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	pathrelse(&path_to_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	reiserfs_check_path(&path_to_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	reiserfs_write_unlock(inode->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) static int reiserfs_readdir(struct file *file, struct dir_context *ctx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	return reiserfs_readdir_inode(file_inode(file), ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278)  * compose directory item containing "." and ".." entries (entries are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279)  * not aligned to 4 byte boundary)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) void make_empty_dir_item_v1(char *body, __le32 dirid, __le32 objid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 			    __le32 par_dirid, __le32 par_objid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	struct reiserfs_de_head *dot, *dotdot;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	memset(body, 0, EMPTY_DIR_SIZE_V1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	dot = (struct reiserfs_de_head *)body;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	dotdot = dot + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	/* direntry header of "." */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	put_deh_offset(dot, DOT_OFFSET);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	/* these two are from make_le_item_head, and are LE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	dot->deh_dir_id = dirid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	dot->deh_objectid = objid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	dot->deh_state = 0;	/* Endian safe if 0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	put_deh_location(dot, EMPTY_DIR_SIZE_V1 - strlen("."));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	mark_de_visible(dot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	/* direntry header of ".." */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	put_deh_offset(dotdot, DOT_DOT_OFFSET);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	/* key of ".." for the root directory */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	/* these two are from the inode, and are LE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	dotdot->deh_dir_id = par_dirid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 	dotdot->deh_objectid = par_objid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	dotdot->deh_state = 0;	/* Endian safe if 0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	put_deh_location(dotdot, deh_location(dot) - strlen(".."));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	mark_de_visible(dotdot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	/* copy ".." and "." */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	memcpy(body + deh_location(dot), ".", 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	memcpy(body + deh_location(dotdot), "..", 2);
^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) /* compose directory item containing "." and ".." entries */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) void make_empty_dir_item(char *body, __le32 dirid, __le32 objid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 			 __le32 par_dirid, __le32 par_objid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	struct reiserfs_de_head *dot, *dotdot;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	memset(body, 0, EMPTY_DIR_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	dot = (struct reiserfs_de_head *)body;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	dotdot = dot + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 	/* direntry header of "." */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	put_deh_offset(dot, DOT_OFFSET);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	/* these two are from make_le_item_head, and are LE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	dot->deh_dir_id = dirid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	dot->deh_objectid = objid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	dot->deh_state = 0;	/* Endian safe if 0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 	put_deh_location(dot, EMPTY_DIR_SIZE - ROUND_UP(strlen(".")));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 	mark_de_visible(dot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	/* direntry header of ".." */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	put_deh_offset(dotdot, DOT_DOT_OFFSET);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	/* key of ".." for the root directory */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 	/* these two are from the inode, and are LE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 	dotdot->deh_dir_id = par_dirid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 	dotdot->deh_objectid = par_objid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 	dotdot->deh_state = 0;	/* Endian safe if 0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 	put_deh_location(dotdot, deh_location(dot) - ROUND_UP(strlen("..")));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 	mark_de_visible(dotdot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	/* copy ".." and "." */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 	memcpy(body + deh_location(dot), ".", 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	memcpy(body + deh_location(dotdot), "..", 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) }