From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/fs/ext2/super.c | 133 ++++++++++++++++++-------------------------
1 files changed, 56 insertions(+), 77 deletions(-)
diff --git a/kernel/fs/ext2/super.c b/kernel/fs/ext2/super.c
index 80a3038..758844b 100644
--- a/kernel/fs/ext2/super.c
+++ b/kernel/fs/ext2/super.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* linux/fs/ext2/super.c
*
@@ -73,7 +74,7 @@
if (test_opt(sb, ERRORS_PANIC))
panic("EXT2-fs: panic from previous error\n");
- if (test_opt(sb, ERRORS_RO)) {
+ if (!sb_rdonly(sb) && test_opt(sb, ERRORS_RO)) {
ext2_msg(sb, KERN_CRIT,
"error: remounting filesystem read-only");
sb->s_flags |= SB_RDONLY;
@@ -148,10 +149,9 @@
ext2_quota_off_umount(sb);
- if (sbi->s_ea_block_cache) {
- ext2_xattr_destroy_cache(sbi->s_ea_block_cache);
- sbi->s_ea_block_cache = NULL;
- }
+ ext2_xattr_destroy_cache(sbi->s_ea_block_cache);
+ sbi->s_ea_block_cache = NULL;
+
if (!sb_rdonly(sb)) {
struct ext2_super_block *es = sbi->s_es;
@@ -162,8 +162,7 @@
}
db_count = sbi->s_gdb_count;
for (i = 0; i < db_count; i++)
- if (sbi->s_group_desc[i])
- brelse (sbi->s_group_desc[i]);
+ brelse(sbi->s_group_desc[i]);
kfree(sbi->s_group_desc);
kfree(sbi->s_debts);
percpu_counter_destroy(&sbi->s_freeblocks_counter);
@@ -193,15 +192,9 @@
return &ei->vfs_inode;
}
-static void ext2_i_callback(struct rcu_head *head)
+static void ext2_free_in_core_inode(struct inode *inode)
{
- struct inode *inode = container_of(head, struct inode, i_rcu);
kmem_cache_free(ext2_inode_cachep, EXT2_I(inode));
-}
-
-static void ext2_destroy_inode(struct inode *inode)
-{
- call_rcu(&inode->i_rcu, ext2_i_callback);
}
static void init_once(void *foo)
@@ -309,20 +302,17 @@
if (test_opt(sb, NOBH))
seq_puts(seq, ",nobh");
-#if defined(CONFIG_QUOTA)
- if (sbi->s_mount_opt & EXT2_MOUNT_USRQUOTA)
+ if (test_opt(sb, USRQUOTA))
seq_puts(seq, ",usrquota");
- if (sbi->s_mount_opt & EXT2_MOUNT_GRPQUOTA)
+ if (test_opt(sb, GRPQUOTA))
seq_puts(seq, ",grpquota");
-#endif
-#ifdef CONFIG_FS_DAX
- if (sbi->s_mount_opt & EXT2_MOUNT_XIP)
+ if (test_opt(sb, XIP))
seq_puts(seq, ",xip");
- if (sbi->s_mount_opt & EXT2_MOUNT_DAX)
+
+ if (test_opt(sb, DAX))
seq_puts(seq, ",dax");
-#endif
if (!test_opt(sb, RESERVATION))
seq_puts(seq, ",noreservation");
@@ -355,7 +345,7 @@
static const struct super_operations ext2_sops = {
.alloc_inode = ext2_alloc_inode,
- .destroy_inode = ext2_destroy_inode,
+ .free_inode = ext2_free_in_core_inode,
.write_inode = ext2_write_inode,
.evict_inode = ext2_evict_inode,
.put_super = ext2_put_super,
@@ -441,7 +431,7 @@
enum {
Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid,
Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic,
- Opt_err_ro, Opt_nouid32, Opt_nocheck, Opt_debug,
+ Opt_err_ro, Opt_nouid32, Opt_debug,
Opt_oldalloc, Opt_orlov, Opt_nobh, Opt_user_xattr, Opt_nouser_xattr,
Opt_acl, Opt_noacl, Opt_xip, Opt_dax, Opt_ignore, Opt_err, Opt_quota,
Opt_usrquota, Opt_grpquota, Opt_reservation, Opt_noreservation
@@ -461,8 +451,6 @@
{Opt_err_panic, "errors=panic"},
{Opt_err_ro, "errors=remount-ro"},
{Opt_nouid32, "nouid32"},
- {Opt_nocheck, "check=none"},
- {Opt_nocheck, "nocheck"},
{Opt_debug, "debug"},
{Opt_oldalloc, "oldalloc"},
{Opt_orlov, "orlov"},
@@ -556,12 +544,6 @@
case Opt_nouid32:
set_opt (opts->s_mount_opt, NO_UID32);
break;
- case Opt_nocheck:
- ext2_msg(sb, KERN_WARNING,
- "Option nocheck/check=none is deprecated and"
- " will be removed in June 2020.");
- clear_opt (opts->s_mount_opt, CHECK);
- break;
case Opt_debug:
set_opt (opts->s_mount_opt, DEBUG);
break;
@@ -605,7 +587,7 @@
case Opt_xip:
ext2_msg(sb, KERN_INFO, "use dax instead of xip");
set_opt(opts->s_mount_opt, XIP);
- /* Fall through */
+ fallthrough;
case Opt_dax:
#ifdef CONFIG_FS_DAX
ext2_msg(sb, KERN_WARNING,
@@ -691,10 +673,9 @@
es->s_max_mnt_count = cpu_to_le16(EXT2_DFL_MAX_MNT_COUNT);
le16_add_cpu(&es->s_mnt_count, 1);
if (test_opt (sb, DEBUG))
- ext2_msg(sb, KERN_INFO, "%s, %s, bs=%lu, fs=%lu, gc=%lu, "
+ ext2_msg(sb, KERN_INFO, "%s, %s, bs=%lu, gc=%lu, "
"bpg=%lu, ipg=%lu, mo=%04lx]",
EXT2FS_VERSION, EXT2FS_DATE, sb->s_blocksize,
- sbi->s_frag_size,
sbi->s_groups_count,
EXT2_BLOCKS_PER_GROUP(sb),
EXT2_INODES_PER_GROUP(sb),
@@ -712,13 +693,7 @@
for (i = 0; i < sbi->s_groups_count; i++) {
struct ext2_group_desc *gdp = ext2_get_group_desc(sb, i, NULL);
ext2_fsblk_t first_block = ext2_group_first_block_no(sb, i);
- ext2_fsblk_t last_block;
-
- if (i == sbi->s_groups_count - 1)
- last_block = le32_to_cpu(sbi->s_es->s_blocks_count) - 1;
- else
- last_block = first_block +
- (EXT2_BLOCKS_PER_GROUP(sb) - 1);
+ ext2_fsblk_t last_block = ext2_group_last_block_no(sb, i);
if (le32_to_cpu(gdp->bg_block_bitmap) < first_block ||
le32_to_cpu(gdp->bg_block_bitmap) > last_block)
@@ -780,8 +755,12 @@
res += 1LL << (bits-2);
res += 1LL << (2*(bits-2));
res += 1LL << (3*(bits-2));
+ /* Compute how many metadata blocks are needed */
+ meta_blocks = 1;
+ meta_blocks += 1 + ppb;
+ meta_blocks += 1 + ppb + ppb * ppb;
/* Does block tree limit file size? */
- if (res < upper_limit)
+ if (res + meta_blocks <= upper_limit)
goto check_lfs;
res = upper_limit;
@@ -816,7 +795,6 @@
{
struct ext2_sb_info *sbi = EXT2_SB(sb);
unsigned long bg, first_meta_bg;
- int has_super = 0;
first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg);
@@ -824,10 +802,8 @@
nr < first_meta_bg)
return (logic_sb_block + nr + 1);
bg = sbi->s_desc_per_block * nr;
- if (ext2_bg_has_super(sb, bg))
- has_super = 1;
- return ext2_group_first_block_no(sb, bg) + has_super;
+ return ext2_group_first_block_no(sb, bg) + ext2_bg_has_super(sb, bg);
}
static int ext2_fill_super(struct super_block *sb, void *data, int silent)
@@ -944,8 +920,7 @@
sbi->s_resgid = opts.s_resgid;
sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
- ((EXT2_SB(sb)->s_mount_opt & EXT2_MOUNT_POSIX_ACL) ?
- SB_POSIXACL : 0);
+ (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0);
sb->s_iflags |= SB_I_CGROUPWB;
if (le32_to_cpu(es->s_rev_level) == EXT2_GOOD_OLD_REV &&
@@ -974,13 +949,20 @@
goto failed_mount;
}
+ if (le32_to_cpu(es->s_log_block_size) >
+ (EXT2_MAX_BLOCK_LOG_SIZE - BLOCK_SIZE_BITS)) {
+ ext2_msg(sb, KERN_ERR,
+ "Invalid log block size: %u",
+ le32_to_cpu(es->s_log_block_size));
+ goto failed_mount;
+ }
blocksize = BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size);
- if (sbi->s_mount_opt & EXT2_MOUNT_DAX) {
+ if (test_opt(sb, DAX)) {
if (!bdev_dax_supported(sb->s_bdev, blocksize)) {
ext2_msg(sb, KERN_ERR,
"DAX unsupported by block device. Turning off DAX.");
- sbi->s_mount_opt &= ~EXT2_MOUNT_DAX;
+ clear_opt(sbi->s_mount_opt, DAX);
}
}
@@ -1012,6 +994,8 @@
sb->s_maxbytes = ext2_max_size(sb->s_blocksize_bits);
sb->s_max_links = EXT2_LINK_MAX;
+ sb->s_time_min = S32_MIN;
+ sb->s_time_max = S32_MAX;
if (le32_to_cpu(es->s_rev_level) == EXT2_GOOD_OLD_REV) {
sbi->s_inode_size = EXT2_GOOD_OLD_INODE_SIZE;
@@ -1029,18 +1013,9 @@
}
}
- sbi->s_frag_size = EXT2_MIN_FRAG_SIZE <<
- le32_to_cpu(es->s_log_frag_size);
- if (sbi->s_frag_size == 0)
- goto cantfind_ext2;
- sbi->s_frags_per_block = sb->s_blocksize / sbi->s_frag_size;
-
sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group);
- sbi->s_frags_per_group = le32_to_cpu(es->s_frags_per_group);
sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group);
- if (EXT2_INODE_SIZE(sb) == 0)
- goto cantfind_ext2;
sbi->s_inodes_per_block = sb->s_blocksize / EXT2_INODE_SIZE(sb);
if (sbi->s_inodes_per_block == 0 || sbi->s_inodes_per_group == 0)
goto cantfind_ext2;
@@ -1064,11 +1039,10 @@
goto failed_mount;
}
- if (sb->s_blocksize != sbi->s_frag_size) {
+ if (es->s_log_frag_size != es->s_log_block_size) {
ext2_msg(sb, KERN_ERR,
- "error: fragsize %lu != blocksize %lu"
- "(not supported yet)",
- sbi->s_frag_size, sb->s_blocksize);
+ "error: fragsize log %u != blocksize log %u",
+ le32_to_cpu(es->s_log_frag_size), sb->s_blocksize_bits);
goto failed_mount;
}
@@ -1078,15 +1052,10 @@
sbi->s_blocks_per_group);
goto failed_mount;
}
- if (sbi->s_frags_per_group > sb->s_blocksize * 8) {
+ if (sbi->s_inodes_per_group < sbi->s_inodes_per_block ||
+ sbi->s_inodes_per_group > sb->s_blocksize * 8) {
ext2_msg(sb, KERN_ERR,
- "error: #fragments per group too big: %lu",
- sbi->s_frags_per_group);
- goto failed_mount;
- }
- if (sbi->s_inodes_per_group > sb->s_blocksize * 8) {
- ext2_msg(sb, KERN_ERR,
- "error: #inodes per group too big: %lu",
+ "error: invalid #inodes per group: %lu",
sbi->s_inodes_per_group);
goto failed_mount;
}
@@ -1096,18 +1065,27 @@
sbi->s_groups_count = ((le32_to_cpu(es->s_blocks_count) -
le32_to_cpu(es->s_first_data_block) - 1)
/ EXT2_BLOCKS_PER_GROUP(sb)) + 1;
+ if ((u64)sbi->s_groups_count * sbi->s_inodes_per_group !=
+ le32_to_cpu(es->s_inodes_count)) {
+ ext2_msg(sb, KERN_ERR, "error: invalid #inodes: %u vs computed %llu",
+ le32_to_cpu(es->s_inodes_count),
+ (u64)sbi->s_groups_count * sbi->s_inodes_per_group);
+ goto failed_mount;
+ }
db_count = (sbi->s_groups_count + EXT2_DESC_PER_BLOCK(sb) - 1) /
EXT2_DESC_PER_BLOCK(sb);
sbi->s_group_desc = kmalloc_array (db_count,
sizeof(struct buffer_head *),
GFP_KERNEL);
if (sbi->s_group_desc == NULL) {
+ ret = -ENOMEM;
ext2_msg(sb, KERN_ERR, "error: not enough memory");
goto failed_mount;
}
bgl_lock_init(sbi->s_blockgroup_lock);
sbi->s_debts = kcalloc(sbi->s_groups_count, sizeof(*sbi->s_debts), GFP_KERNEL);
if (!sbi->s_debts) {
+ ret = -ENOMEM;
ext2_msg(sb, KERN_ERR, "error: not enough memory");
goto failed_mount_group_desc;
}
@@ -1156,6 +1134,7 @@
ext2_count_dirs(sb), GFP_KERNEL);
}
if (err) {
+ ret = err;
ext2_msg(sb, KERN_ERR, "error: insufficient memory");
goto failed_mount3;
}
@@ -1163,6 +1142,7 @@
#ifdef CONFIG_EXT2_FS_XATTR
sbi->s_ea_block_cache = ext2_xattr_create_cache();
if (!sbi->s_ea_block_cache) {
+ ret = -ENOMEM;
ext2_msg(sb, KERN_ERR, "Failed to create ea_block_cache");
goto failed_mount3;
}
@@ -1212,8 +1192,7 @@
sb->s_id);
goto failed_mount;
failed_mount3:
- if (sbi->s_ea_block_cache)
- ext2_xattr_destroy_cache(sbi->s_ea_block_cache);
+ ext2_xattr_destroy_cache(sbi->s_ea_block_cache);
percpu_counter_destroy(&sbi->s_freeblocks_counter);
percpu_counter_destroy(&sbi->s_freeinodes_counter);
percpu_counter_destroy(&sbi->s_dirs_counter);
@@ -1413,7 +1392,7 @@
sbi->s_resuid = new_opts.s_resuid;
sbi->s_resgid = new_opts.s_resgid;
sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
- ((sbi->s_mount_opt & EXT2_MOUNT_POSIX_ACL) ? SB_POSIXACL : 0);
+ (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0);
spin_unlock(&sbi->s_lock);
return 0;
@@ -1480,8 +1459,7 @@
buf->f_namelen = EXT2_NAME_LEN;
fsid = le64_to_cpup((void *)es->s_uuid) ^
le64_to_cpup((void *)es->s_uuid + sizeof(u64));
- buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL;
- buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL;
+ buf->f_fsid = u64_to_fsid(fsid);
spin_unlock(&sbi->s_lock);
return 0;
}
@@ -1676,5 +1654,6 @@
MODULE_AUTHOR("Remy Card and others");
MODULE_DESCRIPTION("Second Extended Filesystem");
MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS(ANDROID_GKI_VFS_EXPORT_ONLY);
module_init(init_ext2_fs)
module_exit(exit_ext2_fs)
--
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