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)  * direct.c - NILFS direct block pointer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Written by Koji Sato.
^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/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include "nilfs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include "page.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include "direct.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include "alloc.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include "dat.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) static inline __le64 *nilfs_direct_dptrs(const struct nilfs_bmap *direct)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 	return (__le64 *)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 		((struct nilfs_direct_node *)direct->b_u.u_data + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) static inline __u64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) nilfs_direct_get_ptr(const struct nilfs_bmap *direct, __u64 key)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	return le64_to_cpu(*(nilfs_direct_dptrs(direct) + key));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) static inline void nilfs_direct_set_ptr(struct nilfs_bmap *direct,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 					__u64 key, __u64 ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	*(nilfs_direct_dptrs(direct) + key) = cpu_to_le64(ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) static int nilfs_direct_lookup(const struct nilfs_bmap *direct,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 			       __u64 key, int level, __u64 *ptrp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	__u64 ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	if (key > NILFS_DIRECT_KEY_MAX || level != 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 		return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	ptr = nilfs_direct_get_ptr(direct, key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	if (ptr == NILFS_BMAP_INVALID_PTR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 		return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	*ptrp = ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) static int nilfs_direct_lookup_contig(const struct nilfs_bmap *direct,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 				      __u64 key, __u64 *ptrp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 				      unsigned int maxblocks)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	struct inode *dat = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	__u64 ptr, ptr2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	sector_t blocknr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	int ret, cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	if (key > NILFS_DIRECT_KEY_MAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 		return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	ptr = nilfs_direct_get_ptr(direct, key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	if (ptr == NILFS_BMAP_INVALID_PTR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 		return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	if (NILFS_BMAP_USE_VBN(direct)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 		dat = nilfs_bmap_get_dat(direct);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		ret = nilfs_dat_translate(dat, ptr, &blocknr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 		if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 		ptr = blocknr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	maxblocks = min_t(unsigned int, maxblocks,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 			  NILFS_DIRECT_KEY_MAX - key + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	for (cnt = 1; cnt < maxblocks &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 		     (ptr2 = nilfs_direct_get_ptr(direct, key + cnt)) !=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 		     NILFS_BMAP_INVALID_PTR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	     cnt++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 		if (dat) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 			ret = nilfs_dat_translate(dat, ptr2, &blocknr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 			if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 				return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 			ptr2 = blocknr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 		if (ptr2 != ptr + cnt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	*ptrp = ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	return cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) static __u64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) nilfs_direct_find_target_v(const struct nilfs_bmap *direct, __u64 key)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	__u64 ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	ptr = nilfs_bmap_find_target_seq(direct, key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	if (ptr != NILFS_BMAP_INVALID_PTR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		/* sequential access */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		return ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	/* block group */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	return nilfs_bmap_find_target_in_group(direct);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) static int nilfs_direct_insert(struct nilfs_bmap *bmap, __u64 key, __u64 ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	union nilfs_bmap_ptr_req req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	struct inode *dat = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	if (key > NILFS_DIRECT_KEY_MAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 		return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	if (nilfs_direct_get_ptr(bmap, key) != NILFS_BMAP_INVALID_PTR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		return -EEXIST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	if (NILFS_BMAP_USE_VBN(bmap)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		req.bpr_ptr = nilfs_direct_find_target_v(bmap, key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 		dat = nilfs_bmap_get_dat(bmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	ret = nilfs_bmap_prepare_alloc_ptr(bmap, &req, dat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	if (!ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		/* ptr must be a pointer to a buffer head. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		bh = (struct buffer_head *)((unsigned long)ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 		set_buffer_nilfs_volatile(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 		nilfs_bmap_commit_alloc_ptr(bmap, &req, dat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 		nilfs_direct_set_ptr(bmap, key, req.bpr_ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 		if (!nilfs_bmap_dirty(bmap))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 			nilfs_bmap_set_dirty(bmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		if (NILFS_BMAP_USE_VBN(bmap))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 			nilfs_bmap_set_target_v(bmap, key, req.bpr_ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		nilfs_inode_add_blocks(bmap->b_inode, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) static int nilfs_direct_delete(struct nilfs_bmap *bmap, __u64 key)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	union nilfs_bmap_ptr_req req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	struct inode *dat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	if (key > NILFS_DIRECT_KEY_MAX ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	    nilfs_direct_get_ptr(bmap, key) == NILFS_BMAP_INVALID_PTR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 		return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	dat = NILFS_BMAP_USE_VBN(bmap) ? nilfs_bmap_get_dat(bmap) : NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	req.bpr_ptr = nilfs_direct_get_ptr(bmap, key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	ret = nilfs_bmap_prepare_end_ptr(bmap, &req, dat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	if (!ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		nilfs_bmap_commit_end_ptr(bmap, &req, dat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 		nilfs_direct_set_ptr(bmap, key, NILFS_BMAP_INVALID_PTR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 		nilfs_inode_sub_blocks(bmap->b_inode, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) static int nilfs_direct_seek_key(const struct nilfs_bmap *direct, __u64 start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 				 __u64 *keyp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	__u64 key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	for (key = start; key <= NILFS_DIRECT_KEY_MAX; key++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		if (nilfs_direct_get_ptr(direct, key) !=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		    NILFS_BMAP_INVALID_PTR) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 			*keyp = key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 			return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) static int nilfs_direct_last_key(const struct nilfs_bmap *direct, __u64 *keyp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	__u64 key, lastkey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	lastkey = NILFS_DIRECT_KEY_MAX + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	for (key = NILFS_DIRECT_KEY_MIN; key <= NILFS_DIRECT_KEY_MAX; key++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		if (nilfs_direct_get_ptr(direct, key) !=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 		    NILFS_BMAP_INVALID_PTR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 			lastkey = key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	if (lastkey == NILFS_DIRECT_KEY_MAX + 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 		return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	*keyp = lastkey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) static int nilfs_direct_check_insert(const struct nilfs_bmap *bmap, __u64 key)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	return key > NILFS_DIRECT_KEY_MAX;
^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) static int nilfs_direct_gather_data(struct nilfs_bmap *direct,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 				    __u64 *keys, __u64 *ptrs, int nitems)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	__u64 key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	__u64 ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	int n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	if (nitems > NILFS_DIRECT_NBLOCKS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		nitems = NILFS_DIRECT_NBLOCKS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	n = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	for (key = 0; key < nitems; key++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 		ptr = nilfs_direct_get_ptr(direct, key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		if (ptr != NILFS_BMAP_INVALID_PTR) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 			keys[n] = key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 			ptrs[n] = ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 			n++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	return n;
^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) int nilfs_direct_delete_and_convert(struct nilfs_bmap *bmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 				    __u64 key, __u64 *keys, __u64 *ptrs, int n)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	__le64 *dptrs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	int ret, i, j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	/* no need to allocate any resource for conversion */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	/* delete */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	ret = bmap->b_ops->bop_delete(bmap, key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	/* free resources */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	if (bmap->b_ops->bop_clear != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 		bmap->b_ops->bop_clear(bmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	/* convert */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	dptrs = nilfs_direct_dptrs(bmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	for (i = 0, j = 0; i < NILFS_DIRECT_NBLOCKS; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 		if ((j < n) && (i == keys[j])) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 			dptrs[i] = (i != key) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 				cpu_to_le64(ptrs[j]) :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 				NILFS_BMAP_INVALID_PTR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 			j++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 		} else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 			dptrs[i] = NILFS_BMAP_INVALID_PTR;
^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) 	nilfs_direct_init(bmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) static int nilfs_direct_propagate(struct nilfs_bmap *bmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 				  struct buffer_head *bh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	struct nilfs_palloc_req oldreq, newreq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	struct inode *dat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	__u64 key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	__u64 ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	if (!NILFS_BMAP_USE_VBN(bmap))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	dat = nilfs_bmap_get_dat(bmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	key = nilfs_bmap_data_get_key(bmap, bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	ptr = nilfs_direct_get_ptr(bmap, key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	if (!buffer_nilfs_volatile(bh)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 		oldreq.pr_entry_nr = ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 		newreq.pr_entry_nr = ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 		ret = nilfs_dat_prepare_update(dat, &oldreq, &newreq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 		if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 		nilfs_dat_commit_update(dat, &oldreq, &newreq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 					bmap->b_ptr_type == NILFS_BMAP_PTR_VS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 		set_buffer_nilfs_volatile(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 		nilfs_direct_set_ptr(bmap, key, newreq.pr_entry_nr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	} else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 		ret = nilfs_dat_mark_dirty(dat, ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) static int nilfs_direct_assign_v(struct nilfs_bmap *direct,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 				 __u64 key, __u64 ptr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 				 struct buffer_head **bh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 				 sector_t blocknr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 				 union nilfs_binfo *binfo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	struct inode *dat = nilfs_bmap_get_dat(direct);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	union nilfs_bmap_ptr_req req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	req.bpr_ptr = ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	ret = nilfs_dat_prepare_start(dat, &req.bpr_req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	if (!ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 		nilfs_dat_commit_start(dat, &req.bpr_req, blocknr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 		binfo->bi_v.bi_vblocknr = cpu_to_le64(ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 		binfo->bi_v.bi_blkoff = cpu_to_le64(key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 	return ret;
^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) static int nilfs_direct_assign_p(struct nilfs_bmap *direct,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 				 __u64 key, __u64 ptr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 				 struct buffer_head **bh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 				 sector_t blocknr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 				 union nilfs_binfo *binfo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	nilfs_direct_set_ptr(direct, key, blocknr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 	binfo->bi_dat.bi_blkoff = cpu_to_le64(key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	binfo->bi_dat.bi_level = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) static int nilfs_direct_assign(struct nilfs_bmap *bmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 			       struct buffer_head **bh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 			       sector_t blocknr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 			       union nilfs_binfo *binfo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	__u64 key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	__u64 ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	key = nilfs_bmap_data_get_key(bmap, *bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 	if (unlikely(key > NILFS_DIRECT_KEY_MAX)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 		nilfs_crit(bmap->b_inode->i_sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 			   "%s (ino=%lu): invalid key: %llu",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 			   __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 			   bmap->b_inode->i_ino, (unsigned long long)key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 	ptr = nilfs_direct_get_ptr(bmap, key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 	if (unlikely(ptr == NILFS_BMAP_INVALID_PTR)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 		nilfs_crit(bmap->b_inode->i_sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 			   "%s (ino=%lu): invalid pointer: %llu",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 			   __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 			   bmap->b_inode->i_ino, (unsigned long long)ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	return NILFS_BMAP_USE_VBN(bmap) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 		nilfs_direct_assign_v(bmap, key, ptr, bh, blocknr, binfo) :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 		nilfs_direct_assign_p(bmap, key, ptr, bh, blocknr, binfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) static const struct nilfs_bmap_operations nilfs_direct_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	.bop_lookup		=	nilfs_direct_lookup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	.bop_lookup_contig	=	nilfs_direct_lookup_contig,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 	.bop_insert		=	nilfs_direct_insert,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 	.bop_delete		=	nilfs_direct_delete,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 	.bop_clear		=	NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 	.bop_propagate		=	nilfs_direct_propagate,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 	.bop_lookup_dirty_buffers	=	NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 	.bop_assign		=	nilfs_direct_assign,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 	.bop_mark		=	NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 	.bop_seek_key		=	nilfs_direct_seek_key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 	.bop_last_key		=	nilfs_direct_last_key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 	.bop_check_insert	=	nilfs_direct_check_insert,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 	.bop_check_delete	=	NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 	.bop_gather_data	=	nilfs_direct_gather_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) int nilfs_direct_init(struct nilfs_bmap *bmap)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 	bmap->b_ops = &nilfs_direct_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) }