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firmware/br-ext-chip-allwinner/board/v83x/kernel/patches/00000-fs_f2fs_dir.c.patch

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diff -drupN a/fs/f2fs/dir.c b/fs/f2fs/dir.c
--- a/fs/f2fs/dir.c 2018-08-06 17:23:04.000000000 +0300
+++ b/fs/f2fs/dir.c 2022-06-12 05:28:14.000000000 +0300
@@ -10,10 +10,12 @@
*/
#include <linux/fs.h>
#include <linux/f2fs_fs.h>
+#include <linux/sched.h>
#include "f2fs.h"
#include "node.h"
#include "acl.h"
#include "xattr.h"
+#include <trace/events/f2fs.h>
static unsigned long dir_blocks(struct inode *inode)
{
@@ -92,14 +94,12 @@ static struct f2fs_dir_entry *find_in_bl
struct f2fs_dir_entry *de;
struct f2fs_dentry_ptr d;
- dentry_blk = (struct f2fs_dentry_block *)kmap(dentry_page);
+ dentry_blk = (struct f2fs_dentry_block *)page_address(dentry_page);
- make_dentry_ptr(NULL, &d, (void *)dentry_blk, 1);
+ make_dentry_ptr_block(NULL, &d, dentry_blk);
de = find_target_dentry(fname, namehash, max_slots, &d);
if (de)
*res_page = dentry_page;
- else
- kunmap(dentry_page);
return de;
}
@@ -111,8 +111,6 @@ struct f2fs_dir_entry *find_target_dentr
struct f2fs_dir_entry *de;
unsigned long bit_pos = 0;
int max_len = 0;
- struct fscrypt_str de_name = FSTR_INIT(NULL, 0);
- struct fscrypt_str *name = &fname->disk_name;
if (max_slots)
*max_slots = 0;
@@ -130,29 +128,11 @@ struct f2fs_dir_entry *find_target_dentr
continue;
}
- if (de->hash_code != namehash)
- goto not_match;
-
- de_name.name = d->filename[bit_pos];
- de_name.len = le16_to_cpu(de->name_len);
-
-#ifdef CONFIG_F2FS_FS_ENCRYPTION
- if (unlikely(!name->name)) {
- if (fname->usr_fname->name[0] == '_') {
- if (de_name.len > 32 &&
- !memcmp(de_name.name + ((de_name.len - 17) & ~15),
- fname->crypto_buf.name + 8, 16))
- goto found;
- goto not_match;
- }
- name->name = fname->crypto_buf.name;
- name->len = fname->crypto_buf.len;
- }
-#endif
- if (de_name.len == name->len &&
- !memcmp(de_name.name, name->name, name->len))
+ if (de->hash_code == namehash &&
+ fscrypt_match_name(fname, d->filename[bit_pos],
+ le16_to_cpu(de->name_len)))
goto found;
-not_match:
+
if (max_slots && max_len > *max_slots)
*max_slots = max_len;
max_len = 0;
@@ -212,13 +192,9 @@ static struct f2fs_dir_entry *find_in_le
f2fs_put_page(dentry_page, 0);
}
- /* This is to increase the speed of f2fs_create */
- if (!de && room) {
- F2FS_I(dir)->task = current;
- if (F2FS_I(dir)->chash != namehash) {
- F2FS_I(dir)->chash = namehash;
- F2FS_I(dir)->clevel = level;
- }
+ if (!de && room && F2FS_I(dir)->chash != namehash) {
+ F2FS_I(dir)->chash = namehash;
+ F2FS_I(dir)->clevel = level;
}
return de;
@@ -259,6 +235,9 @@ struct f2fs_dir_entry *__f2fs_find_entry
break;
}
out:
+ /* This is to increase the speed of f2fs_create */
+ if (!de)
+ F2FS_I(dir)->task = current;
return de;
}
@@ -306,7 +285,6 @@ ino_t f2fs_inode_by_name(struct inode *d
de = f2fs_find_entry(dir, qstr, page);
if (de) {
res = le32_to_cpu(de->ino);
- f2fs_dentry_kunmap(dir, *page);
f2fs_put_page(*page, 0);
}
@@ -321,11 +299,10 @@ void f2fs_set_link(struct inode *dir, st
f2fs_wait_on_page_writeback(page, type, true);
de->ino = cpu_to_le32(inode->i_ino);
set_de_type(de, inode->i_mode);
- f2fs_dentry_kunmap(dir, page);
set_page_dirty(page);
dir->i_mtime = dir->i_ctime = current_time(dir);
- f2fs_mark_inode_dirty_sync(dir);
+ f2fs_mark_inode_dirty_sync(dir, false);
f2fs_put_page(page, 1);
}
@@ -342,24 +319,6 @@ static void init_dent_inode(const struct
set_page_dirty(ipage);
}
-int update_dent_inode(struct inode *inode, struct inode *to,
- const struct qstr *name)
-{
- struct page *page;
-
- if (file_enc_name(to))
- return 0;
-
- page = get_node_page(F2FS_I_SB(inode), inode->i_ino);
- if (IS_ERR(page))
- return PTR_ERR(page);
-
- init_dent_inode(name, page);
- f2fs_put_page(page, 1);
-
- return 0;
-}
-
void do_make_empty_dir(struct inode *inode, struct inode *parent,
struct f2fs_dentry_ptr *d)
{
@@ -387,13 +346,11 @@ static int make_empty_dir(struct inode *
if (IS_ERR(dentry_page))
return PTR_ERR(dentry_page);
- dentry_blk = kmap_atomic(dentry_page);
+ dentry_blk = page_address(dentry_page);
- make_dentry_ptr(NULL, &d, (void *)dentry_blk, 1);
+ make_dentry_ptr_block(NULL, &d, dentry_blk);
do_make_empty_dir(inode, parent, &d);
- kunmap_atomic(dentry_blk);
-
set_page_dirty(dentry_page);
f2fs_put_page(dentry_page, 1);
return 0;
@@ -404,6 +361,7 @@ struct page *init_inode_metadata(struct
struct page *dpage)
{
struct page *page;
+ int dummy_encrypt = DUMMY_ENCRYPTION_ENABLED(F2FS_I_SB(dir));
int err;
if (is_inode_flag_set(inode, FI_NEW_INODE)) {
@@ -430,7 +388,8 @@ struct page *init_inode_metadata(struct
if (err)
goto put_error;
- if (f2fs_encrypted_inode(dir) && f2fs_may_encrypt(inode)) {
+ if ((f2fs_encrypted_inode(dir) || dummy_encrypt) &&
+ f2fs_may_encrypt(inode)) {
err = fscrypt_inherit_context(dir, inode, page, false);
if (err)
goto put_error;
@@ -439,19 +398,21 @@ struct page *init_inode_metadata(struct
page = get_node_page(F2FS_I_SB(dir), inode->i_ino);
if (IS_ERR(page))
return page;
-
- set_cold_node(inode, page);
}
- if (new_name)
+ if (new_name) {
init_dent_inode(new_name, page);
+ if (f2fs_encrypted_inode(dir))
+ file_set_enc_name(inode);
+ }
/*
* This file should be checkpointed during fsync.
* We lost i_pino from now on.
*/
if (is_inode_flag_set(inode, FI_INC_LINK)) {
- file_lost_pino(inode);
+ if (!S_ISDIR(inode->i_mode))
+ file_lost_pino(inode);
/*
* If link the tmpfile to alias through linkat path,
* we should remove this inode from orphan list.
@@ -478,7 +439,7 @@ void update_parent_metadata(struct inode
clear_inode_flag(inode, FI_NEW_INODE);
}
dir->i_mtime = dir->i_ctime = current_time(dir);
- f2fs_mark_inode_dirty_sync(dir);
+ f2fs_mark_inode_dirty_sync(dir, false);
if (F2FS_I(dir)->i_current_depth != current_depth)
f2fs_i_depth_write(dir, current_depth);
@@ -557,8 +518,10 @@ int f2fs_add_regular_entry(struct inode
start:
#ifdef CONFIG_F2FS_FAULT_INJECTION
- if (time_to_inject(F2FS_I_SB(dir), FAULT_DIR_DEPTH))
+ if (time_to_inject(F2FS_I_SB(dir), FAULT_DIR_DEPTH)) {
+ f2fs_show_injection_info(FAULT_DIR_DEPTH);
return -ENOSPC;
+ }
#endif
if (unlikely(current_depth == MAX_DIR_HASH_DEPTH))
return -ENOSPC;
@@ -578,13 +541,12 @@ start:
if (IS_ERR(dentry_page))
return PTR_ERR(dentry_page);
- dentry_blk = kmap(dentry_page);
+ dentry_blk = page_address(dentry_page);
bit_pos = room_for_filename(&dentry_blk->dentry_bitmap,
slots, NR_DENTRY_IN_BLOCK);
if (bit_pos < NR_DENTRY_IN_BLOCK)
goto add_dentry;
- kunmap(dentry_page);
f2fs_put_page(dentry_page, 1);
}
@@ -602,11 +564,9 @@ add_dentry:
err = PTR_ERR(page);
goto fail;
}
- if (f2fs_encrypted_inode(dir))
- file_set_enc_name(inode);
}
- make_dentry_ptr(NULL, &d, (void *)dentry_blk, 1);
+ make_dentry_ptr_block(NULL, &d, dentry_blk);
f2fs_update_dentry(ino, mode, &d, new_name, dentry_hash, bit_pos);
set_page_dirty(dentry_page);
@@ -621,7 +581,6 @@ fail:
if (inode)
up_write(&F2FS_I(inode)->i_sem);
- kunmap(dentry_page);
f2fs_put_page(dentry_page, 1);
return err;
@@ -675,7 +634,6 @@ int __f2fs_add_link(struct inode *dir, c
F2FS_I(dir)->task = NULL;
}
if (de) {
- f2fs_dentry_kunmap(dir, page);
f2fs_put_page(page, 0);
err = -EEXIST;
} else if (IS_ERR(page)) {
@@ -740,10 +698,15 @@ void f2fs_delete_entry(struct f2fs_dir_e
struct f2fs_dentry_block *dentry_blk;
unsigned int bit_pos;
int slots = GET_DENTRY_SLOTS(le16_to_cpu(dentry->name_len));
+ struct address_space *mapping = page_mapping(page);
+ unsigned long flags;
int i;
f2fs_update_time(F2FS_I_SB(dir), REQ_TIME);
+ if (F2FS_OPTION(F2FS_I_SB(dir)).fsync_mode == FSYNC_MODE_STRICT)
+ add_ino_entry(F2FS_I_SB(dir), dir->i_ino, TRANS_DIR_INO);
+
if (f2fs_has_inline_dentry(dir))
return f2fs_delete_inline_entry(dentry, page, dir, inode);
@@ -753,27 +716,32 @@ void f2fs_delete_entry(struct f2fs_dir_e
dentry_blk = page_address(page);
bit_pos = dentry - dentry_blk->dentry;
for (i = 0; i < slots; i++)
- clear_bit_le(bit_pos + i, &dentry_blk->dentry_bitmap);
+ __clear_bit_le(bit_pos + i, &dentry_blk->dentry_bitmap);
/* Let's check and deallocate this dentry page */
bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap,
NR_DENTRY_IN_BLOCK,
0);
- kunmap(page); /* kunmap - pair of f2fs_find_entry */
set_page_dirty(page);
dir->i_ctime = dir->i_mtime = current_time(dir);
- f2fs_mark_inode_dirty_sync(dir);
+ f2fs_mark_inode_dirty_sync(dir, false);
if (inode)
f2fs_drop_nlink(dir, inode);
if (bit_pos == NR_DENTRY_IN_BLOCK &&
!truncate_hole(dir, page->index, page->index + 1)) {
+ spin_lock_irqsave(&mapping->tree_lock, flags);
+ radix_tree_tag_clear(&mapping->page_tree, page_index(page),
+ PAGECACHE_TAG_DIRTY);
+ spin_unlock_irqrestore(&mapping->tree_lock, flags);
+
clear_page_dirty_for_io(page);
ClearPagePrivate(page);
ClearPageUptodate(page);
inode_dec_dirty_pages(dir);
+ remove_dirty_inode(dir);
}
f2fs_put_page(page, 1);
}
@@ -798,7 +766,7 @@ bool f2fs_empty_dir(struct inode *dir)
return false;
}
- dentry_blk = kmap_atomic(dentry_page);
+ dentry_blk = page_address(dentry_page);
if (bidx == 0)
bit_pos = 2;
else
@@ -806,7 +774,6 @@ bool f2fs_empty_dir(struct inode *dir)
bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap,
NR_DENTRY_IN_BLOCK,
bit_pos);
- kunmap_atomic(dentry_blk);
f2fs_put_page(dentry_page, 1);
@@ -816,13 +783,14 @@ bool f2fs_empty_dir(struct inode *dir)
return true;
}
-bool f2fs_fill_dentries(struct dir_context *ctx, struct f2fs_dentry_ptr *d,
+int f2fs_fill_dentries(struct dir_context *ctx, struct f2fs_dentry_ptr *d,
unsigned int start_pos, struct fscrypt_str *fstr)
{
unsigned char d_type = DT_UNKNOWN;
unsigned int bit_pos;
struct f2fs_dir_entry *de = NULL;
struct fscrypt_str de_name = FSTR_INIT(NULL, 0);
+ struct f2fs_sb_info *sbi = F2FS_I_SB(d->inode);
bit_pos = ((unsigned long)ctx->pos % d->max);
@@ -851,7 +819,7 @@ bool f2fs_fill_dentries(struct dir_conte
(u32)de->hash_code, 0,
&de_name, fstr);
if (err)
- return true;
+ return err;
de_name = *fstr;
fstr->len = save_len;
@@ -859,12 +827,15 @@ bool f2fs_fill_dentries(struct dir_conte
if (!dir_emit(ctx, de_name.name, de_name.len,
le32_to_cpu(de->ino), d_type))
- return true;
+ return 1;
+
+ if (sbi->readdir_ra == 1)
+ ra_node_page(sbi, le32_to_cpu(de->ino));
bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
ctx->pos = start_pos + bit_pos;
}
- return false;
+ return 0;
}
static int f2fs_readdir(struct file *file, struct dir_context *ctx)
@@ -874,6 +845,7 @@ static int f2fs_readdir(struct file *fil
struct f2fs_dentry_block *dentry_blk = NULL;
struct page *dentry_page = NULL;
struct file_ra_state *ra = &file->f_ra;
+ loff_t start_pos = ctx->pos;
unsigned int n = ((unsigned long)ctx->pos / NR_DENTRY_IN_BLOCK);
struct f2fs_dentry_ptr d;
struct fscrypt_str fstr = FSTR_INIT(NULL, 0);
@@ -882,51 +854,61 @@ static int f2fs_readdir(struct file *fil
if (f2fs_encrypted_inode(inode)) {
err = fscrypt_get_encryption_info(inode);
if (err && err != -ENOKEY)
- return err;
+ goto out;
err = fscrypt_fname_alloc_buffer(inode, F2FS_NAME_LEN, &fstr);
if (err < 0)
- return err;
+ goto out;
}
if (f2fs_has_inline_dentry(inode)) {
err = f2fs_read_inline_dir(file, ctx, &fstr);
- goto out;
+ goto out_free;
}
- /* readahead for multi pages of dir */
- if (npages - n > 1 && !ra_has_index(ra, n))
- page_cache_sync_readahead(inode->i_mapping, ra, file, n,
+ for (; n < npages; n++, ctx->pos = n * NR_DENTRY_IN_BLOCK) {
+
+ /* allow readdir() to be interrupted */
+ if (fatal_signal_pending(current)) {
+ err = -ERESTARTSYS;
+ goto out_free;
+ }
+ cond_resched();
+
+ /* readahead for multi pages of dir */
+ if (npages - n > 1 && !ra_has_index(ra, n))
+ page_cache_sync_readahead(inode->i_mapping, ra, file, n,
min(npages - n, (pgoff_t)MAX_DIR_RA_PAGES));
- for (; n < npages; n++) {
dentry_page = get_lock_data_page(inode, n, false);
if (IS_ERR(dentry_page)) {
err = PTR_ERR(dentry_page);
- if (err == -ENOENT)
+ if (err == -ENOENT) {
+ err = 0;
continue;
- else
- goto out;
+ } else {
+ goto out_free;
+ }
}
- dentry_blk = kmap(dentry_page);
+ dentry_blk = page_address(dentry_page);
- make_dentry_ptr(inode, &d, (void *)dentry_blk, 1);
+ make_dentry_ptr_block(inode, &d, dentry_blk);
- if (f2fs_fill_dentries(ctx, &d, n * NR_DENTRY_IN_BLOCK, &fstr)) {
- kunmap(dentry_page);
+ err = f2fs_fill_dentries(ctx, &d,
+ n * NR_DENTRY_IN_BLOCK, &fstr);
+ if (err) {
f2fs_put_page(dentry_page, 1);
break;
}
- ctx->pos = (n + 1) * NR_DENTRY_IN_BLOCK;
- kunmap(dentry_page);
f2fs_put_page(dentry_page, 1);
}
- err = 0;
-out:
+out_free:
fscrypt_fname_free_buffer(&fstr);
- return err;
+out:
+ trace_f2fs_readdir(inode, start_pos, ctx->pos, err);
+ return err < 0 ? err : 0;
}
static int f2fs_dir_open(struct inode *inode, struct file *filp)
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