dir.c (0eb43812c0270ee3d005ff32f91f7d0a6c4943af) dir.c (85aa8ddc3818718208c3cfdfda9c8c908c9dead1)
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * linux/fs/nfs/dir.c
4 *
5 * Copyright (C) 1992 Rick Sladkey
6 *
7 * nfs directory handling functions
8 *

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1069 int res;
1070
1071 do {
1072 res = find_and_lock_cache_page(desc);
1073 } while (res == -EAGAIN);
1074 return res;
1075}
1076
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * linux/fs/nfs/dir.c
4 *
5 * Copyright (C) 1992 Rick Sladkey
6 *
7 * nfs directory handling functions
8 *

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1069 int res;
1070
1071 do {
1072 res = find_and_lock_cache_page(desc);
1073 } while (res == -EAGAIN);
1074 return res;
1075}
1076
1077#define NFS_READDIR_CACHE_MISS_THRESHOLD (16UL)
1078
1077/*
1078 * Once we've found the start of the dirent within a page: fill 'er up...
1079 */
1080static void nfs_do_filldir(struct nfs_readdir_descriptor *desc,
1081 const __be32 *verf)
1082{
1083 struct file *file = desc->file;
1084 struct nfs_cache_array *array;
1085 unsigned int i;
1079/*
1080 * Once we've found the start of the dirent within a page: fill 'er up...
1081 */
1082static void nfs_do_filldir(struct nfs_readdir_descriptor *desc,
1083 const __be32 *verf)
1084{
1085 struct file *file = desc->file;
1086 struct nfs_cache_array *array;
1087 unsigned int i;
1088 bool first_emit = !desc->dir_cookie;
1086
1087 array = kmap_local_page(desc->page);
1088 for (i = desc->cache_entry_index; i < array->size; i++) {
1089 struct nfs_cache_array_entry *ent;
1090
1091 ent = &array->array[i];
1092 if (!dir_emit(desc->ctx, ent->name, ent->name_len,
1093 nfs_compat_user_ino64(ent->ino), ent->d_type)) {

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1101 } else {
1102 desc->dir_cookie = array->array[i + 1].cookie;
1103 desc->last_cookie = array->array[0].cookie;
1104 }
1105 if (nfs_readdir_use_cookie(file))
1106 desc->ctx->pos = desc->dir_cookie;
1107 else
1108 desc->ctx->pos++;
1089
1090 array = kmap_local_page(desc->page);
1091 for (i = desc->cache_entry_index; i < array->size; i++) {
1092 struct nfs_cache_array_entry *ent;
1093
1094 ent = &array->array[i];
1095 if (!dir_emit(desc->ctx, ent->name, ent->name_len,
1096 nfs_compat_user_ino64(ent->ino), ent->d_type)) {

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1104 } else {
1105 desc->dir_cookie = array->array[i + 1].cookie;
1106 desc->last_cookie = array->array[0].cookie;
1107 }
1108 if (nfs_readdir_use_cookie(file))
1109 desc->ctx->pos = desc->dir_cookie;
1110 else
1111 desc->ctx->pos++;
1112 if (first_emit && i > NFS_READDIR_CACHE_MISS_THRESHOLD + 1) {
1113 desc->eob = true;
1114 break;
1115 }
1109 }
1110 if (array->page_is_eof)
1111 desc->eof = !desc->eob;
1112
1113 kunmap_local(array);
1114 dfprintk(DIRCACHE, "NFS: nfs_do_filldir() filling ended @ cookie %llu\n",
1115 (unsigned long long)desc->dir_cookie);
1116}

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1182 if (!nfs_readdir_use_cookie(desc->file))
1183 nfs_readdir_rewind_search(desc);
1184 desc->page_index_max = -1;
1185 kfree(arrays);
1186 dfprintk(DIRCACHE, "NFS: %s: returns %d\n", __func__, status);
1187 return status;
1188}
1189
1116 }
1117 if (array->page_is_eof)
1118 desc->eof = !desc->eob;
1119
1120 kunmap_local(array);
1121 dfprintk(DIRCACHE, "NFS: nfs_do_filldir() filling ended @ cookie %llu\n",
1122 (unsigned long long)desc->dir_cookie);
1123}

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1189 if (!nfs_readdir_use_cookie(desc->file))
1190 nfs_readdir_rewind_search(desc);
1191 desc->page_index_max = -1;
1192 kfree(arrays);
1193 dfprintk(DIRCACHE, "NFS: %s: returns %d\n", __func__, status);
1194 return status;
1195}
1196
1190#define NFS_READDIR_CACHE_MISS_THRESHOLD (16UL)
1191
1192static bool nfs_readdir_handle_cache_misses(struct inode *inode,
1193 struct nfs_readdir_descriptor *desc,
1194 unsigned int cache_misses,
1195 bool force_clear)
1196{
1197 if (desc->ctx->pos == 0 || !desc->plus)
1198 return false;
1199 if (cache_misses <= NFS_READDIR_CACHE_MISS_THRESHOLD && !force_clear)

--- 2110 unchanged lines hidden --- 		1197static bool nfs_readdir_handle_cache_misses(struct inode *inode,
1198 struct nfs_readdir_descriptor *desc,
1199 unsigned int cache_misses,
1200 bool force_clear)
1201{
1202 if (desc->ctx->pos == 0 || !desc->plus)
1203 return false;
1204 if (cache_misses <= NFS_READDIR_CACHE_MISS_THRESHOLD && !force_clear)

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