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-rw-r--r--fs/ext4/ext4.h12
-rw-r--r--fs/ext4/inode.c21
-rw-r--r--fs/ext4/readpage.c25
-rw-r--r--fs/ext4/super.c68
-rw-r--r--fs/ext4/sysfs.c2
-rw-r--r--fs/ext4/verity.c35
6 files changed, 82 insertions, 81 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index ad2dbf6e4924..15b062efcff1 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1357,11 +1357,9 @@ struct ext4_super_block {
*/
#define EXT4_MF_MNTDIR_SAMPLED 0x0001
#define EXT4_MF_FS_ABORTED 0x0002 /* Fatal error detected */
-#define EXT4_MF_TEST_DUMMY_ENCRYPTION 0x0004
#ifdef CONFIG_FS_ENCRYPTION
-#define DUMMY_ENCRYPTION_ENABLED(sbi) (unlikely((sbi)->s_mount_flags & \
- EXT4_MF_TEST_DUMMY_ENCRYPTION))
+#define DUMMY_ENCRYPTION_ENABLED(sbi) ((sbi)->s_dummy_enc_ctx.ctx != NULL)
#else
#define DUMMY_ENCRYPTION_ENABLED(sbi) (0)
#endif
@@ -1551,6 +1549,9 @@ struct ext4_sb_info {
struct ratelimit_state s_warning_ratelimit_state;
struct ratelimit_state s_msg_ratelimit_state;
+ /* Encryption context for '-o test_dummy_encryption' */
+ struct fscrypt_dummy_context s_dummy_enc_ctx;
+
/*
* Barrier between writepages ops and changing any inode's JOURNAL_DATA
* or EXTENTS flag.
@@ -3316,9 +3317,8 @@ static inline void ext4_set_de_type(struct super_block *sb,
}
/* readpages.c */
-extern int ext4_mpage_readpages(struct address_space *mapping,
- struct list_head *pages, struct page *page,
- unsigned nr_pages, bool is_readahead);
+extern int ext4_mpage_readpages(struct inode *inode,
+ struct readahead_control *rac, struct page *page);
extern int __init ext4_init_post_read_processing(void);
extern void ext4_exit_post_read_processing(void);
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 2a4aae6acdcb..52be85f96159 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3224,23 +3224,20 @@ static int ext4_readpage(struct file *file, struct page *page)
ret = ext4_readpage_inline(inode, page);
if (ret == -EAGAIN)
- return ext4_mpage_readpages(page->mapping, NULL, page, 1,
- false);
+ return ext4_mpage_readpages(inode, NULL, page);
return ret;
}
-static int
-ext4_readpages(struct file *file, struct address_space *mapping,
- struct list_head *pages, unsigned nr_pages)
+static void ext4_readahead(struct readahead_control *rac)
{
- struct inode *inode = mapping->host;
+ struct inode *inode = rac->mapping->host;
- /* If the file has inline data, no need to do readpages. */
+ /* If the file has inline data, no need to do readahead. */
if (ext4_has_inline_data(inode))
- return 0;
+ return;
- return ext4_mpage_readpages(mapping, pages, NULL, nr_pages, true);
+ ext4_mpage_readpages(inode, rac, NULL);
}
static void ext4_invalidatepage(struct page *page, unsigned int offset,
@@ -3605,7 +3602,7 @@ static int ext4_set_page_dirty(struct page *page)
static const struct address_space_operations ext4_aops = {
.readpage = ext4_readpage,
- .readpages = ext4_readpages,
+ .readahead = ext4_readahead,
.writepage = ext4_writepage,
.writepages = ext4_writepages,
.write_begin = ext4_write_begin,
@@ -3622,7 +3619,7 @@ static const struct address_space_operations ext4_aops = {
static const struct address_space_operations ext4_journalled_aops = {
.readpage = ext4_readpage,
- .readpages = ext4_readpages,
+ .readahead = ext4_readahead,
.writepage = ext4_writepage,
.writepages = ext4_writepages,
.write_begin = ext4_write_begin,
@@ -3638,7 +3635,7 @@ static const struct address_space_operations ext4_journalled_aops = {
static const struct address_space_operations ext4_da_aops = {
.readpage = ext4_readpage,
- .readpages = ext4_readpages,
+ .readahead = ext4_readahead,
.writepage = ext4_writepage,
.writepages = ext4_writepages,
.write_begin = ext4_da_write_begin,
diff --git a/fs/ext4/readpage.c b/fs/ext4/readpage.c
index c1769afbf799..5761e9961682 100644
--- a/fs/ext4/readpage.c
+++ b/fs/ext4/readpage.c
@@ -7,8 +7,8 @@
*
* This was originally taken from fs/mpage.c
*
- * The intent is the ext4_mpage_readpages() function here is intended
- * to replace mpage_readpages() in the general case, not just for
+ * The ext4_mpage_readpages() function here is intended to
+ * replace mpage_readahead() in the general case, not just for
* encrypted files. It has some limitations (see below), where it
* will fall back to read_block_full_page(), but these limitations
* should only be hit when page_size != block_size.
@@ -221,14 +221,12 @@ static inline loff_t ext4_readpage_limit(struct inode *inode)
return i_size_read(inode);
}
-int ext4_mpage_readpages(struct address_space *mapping,
- struct list_head *pages, struct page *page,
- unsigned nr_pages, bool is_readahead)
+int ext4_mpage_readpages(struct inode *inode,
+ struct readahead_control *rac, struct page *page)
{
struct bio *bio = NULL;
sector_t last_block_in_bio = 0;
- struct inode *inode = mapping->host;
const unsigned blkbits = inode->i_blkbits;
const unsigned blocks_per_page = PAGE_SIZE >> blkbits;
const unsigned blocksize = 1 << blkbits;
@@ -241,6 +239,7 @@ int ext4_mpage_readpages(struct address_space *mapping,
int length;
unsigned relative_block = 0;
struct ext4_map_blocks map;
+ unsigned int nr_pages = rac ? readahead_count(rac) : 1;
map.m_pblk = 0;
map.m_lblk = 0;
@@ -251,14 +250,9 @@ int ext4_mpage_readpages(struct address_space *mapping,
int fully_mapped = 1;
unsigned first_hole = blocks_per_page;
- if (pages) {
- page = lru_to_page(pages);
-
+ if (rac) {
+ page = readahead_page(rac);
prefetchw(&page->flags);
- list_del(&page->lru);
- if (add_to_page_cache_lru(page, mapping, page->index,
- readahead_gfp_mask(mapping)))
- goto next_page;
}
if (page_has_buffers(page))
@@ -381,7 +375,7 @@ int ext4_mpage_readpages(struct address_space *mapping,
bio->bi_iter.bi_sector = blocks[0] << (blkbits - 9);
bio->bi_end_io = mpage_end_io;
bio_set_op_attrs(bio, REQ_OP_READ,
- is_readahead ? REQ_RAHEAD : 0);
+ rac ? REQ_RAHEAD : 0);
}
length = first_hole << blkbits;
@@ -406,10 +400,9 @@ int ext4_mpage_readpages(struct address_space *mapping,
else
unlock_page(page);
next_page:
- if (pages)
+ if (rac)
put_page(page);
}
- BUG_ON(pages && !list_empty(pages));
if (bio)
submit_bio(bio);
return 0;
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index bf5fcb477f66..4a3d21972011 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1106,6 +1106,7 @@ static void ext4_put_super(struct super_block *sb)
crypto_free_shash(sbi->s_chksum_driver);
kfree(sbi->s_blockgroup_lock);
fs_put_dax(sbi->s_daxdev);
+ fscrypt_free_dummy_context(&sbi->s_dummy_enc_ctx);
#ifdef CONFIG_UNICODE
utf8_unload(sbi->s_encoding);
#endif
@@ -1389,9 +1390,10 @@ retry:
return res;
}
-static bool ext4_dummy_context(struct inode *inode)
+static const union fscrypt_context *
+ext4_get_dummy_context(struct super_block *sb)
{
- return DUMMY_ENCRYPTION_ENABLED(EXT4_SB(inode->i_sb));
+ return EXT4_SB(sb)->s_dummy_enc_ctx.ctx;
}
static bool ext4_has_stable_inodes(struct super_block *sb)
@@ -1410,7 +1412,7 @@ static const struct fscrypt_operations ext4_cryptops = {
.key_prefix = "ext4:",
.get_context = ext4_get_context,
.set_context = ext4_set_context,
- .dummy_context = ext4_dummy_context,
+ .get_dummy_context = ext4_get_dummy_context,
.empty_dir = ext4_empty_dir,
.max_namelen = EXT4_NAME_LEN,
.has_stable_inodes = ext4_has_stable_inodes,
@@ -1605,6 +1607,7 @@ static const match_table_t tokens = {
{Opt_init_itable, "init_itable"},
{Opt_noinit_itable, "noinit_itable"},
{Opt_max_dir_size_kb, "max_dir_size_kb=%u"},
+ {Opt_test_dummy_encryption, "test_dummy_encryption=%s"},
{Opt_test_dummy_encryption, "test_dummy_encryption"},
{Opt_nombcache, "nombcache"},
{Opt_nombcache, "no_mbcache"}, /* for backward compatibility */
@@ -1816,7 +1819,7 @@ static const struct mount_opts {
{Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT},
{Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT},
{Opt_max_dir_size_kb, 0, MOPT_GTE0},
- {Opt_test_dummy_encryption, 0, MOPT_GTE0},
+ {Opt_test_dummy_encryption, 0, MOPT_STRING},
{Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET},
{Opt_err, 0, 0}
};
@@ -1851,6 +1854,48 @@ static int ext4_sb_read_encoding(const struct ext4_super_block *es,
}
#endif
+static int ext4_set_test_dummy_encryption(struct super_block *sb,
+ const char *opt,
+ const substring_t *arg,
+ bool is_remount)
+{
+#ifdef CONFIG_FS_ENCRYPTION
+ struct ext4_sb_info *sbi = EXT4_SB(sb);
+ int err;
+
+ /*
+ * This mount option is just for testing, and it's not worthwhile to
+ * implement the extra complexity (e.g. RCU protection) that would be
+ * needed to allow it to be set or changed during remount. We do allow
+ * it to be specified during remount, but only if there is no change.
+ */
+ if (is_remount && !sbi->s_dummy_enc_ctx.ctx) {
+ ext4_msg(sb, KERN_WARNING,
+ "Can't set test_dummy_encryption on remount");
+ return -1;
+ }
+ err = fscrypt_set_test_dummy_encryption(sb, arg, &sbi->s_dummy_enc_ctx);
+ if (err) {
+ if (err == -EEXIST)
+ ext4_msg(sb, KERN_WARNING,
+ "Can't change test_dummy_encryption on remount");
+ else if (err == -EINVAL)
+ ext4_msg(sb, KERN_WARNING,
+ "Value of option \"%s\" is unrecognized", opt);
+ else
+ ext4_msg(sb, KERN_WARNING,
+ "Error processing option \"%s\" [%d]",
+ opt, err);
+ return -1;
+ }
+ ext4_msg(sb, KERN_WARNING, "Test dummy encryption mode enabled");
+#else
+ ext4_msg(sb, KERN_WARNING,
+ "Test dummy encryption mount option ignored");
+#endif
+ return 1;
+}
+
static int handle_mount_opt(struct super_block *sb, char *opt, int token,
substring_t *args, unsigned long *journal_devnum,
unsigned int *journal_ioprio, int is_remount)
@@ -2047,14 +2092,8 @@ static int handle_mount_opt(struct super_block *sb, char *opt, int token,
*journal_ioprio =
IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg);
} else if (token == Opt_test_dummy_encryption) {
-#ifdef CONFIG_FS_ENCRYPTION
- sbi->s_mount_flags |= EXT4_MF_TEST_DUMMY_ENCRYPTION;
- ext4_msg(sb, KERN_WARNING,
- "Test dummy encryption mode enabled");
-#else
- ext4_msg(sb, KERN_WARNING,
- "Test dummy encryption mount option ignored");
-#endif
+ return ext4_set_test_dummy_encryption(sb, opt, &args[0],
+ is_remount);
} else if (m->flags & MOPT_DATAJ) {
if (is_remount) {
if (!sbi->s_journal)
@@ -2311,8 +2350,8 @@ static int _ext4_show_options(struct seq_file *seq, struct super_block *sb,
SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb);
if (test_opt(sb, DATA_ERR_ABORT))
SEQ_OPTS_PUTS("data_err=abort");
- if (DUMMY_ENCRYPTION_ENABLED(sbi))
- SEQ_OPTS_PUTS("test_dummy_encryption");
+
+ fscrypt_show_test_dummy_encryption(seq, sep, sb);
ext4_show_quota_options(seq, sb);
return 0;
@@ -4780,6 +4819,7 @@ failed_mount:
for (i = 0; i < EXT4_MAXQUOTAS; i++)
kfree(get_qf_name(sb, sbi, i));
#endif
+ fscrypt_free_dummy_context(&sbi->s_dummy_enc_ctx);
ext4_blkdev_remove(sbi);
brelse(bh);
out_fail:
diff --git a/fs/ext4/sysfs.c b/fs/ext4/sysfs.c
index 04bfaf63752c..6c9fc9e21c13 100644
--- a/fs/ext4/sysfs.c
+++ b/fs/ext4/sysfs.c
@@ -293,6 +293,7 @@ EXT4_ATTR_FEATURE(batched_discard);
EXT4_ATTR_FEATURE(meta_bg_resize);
#ifdef CONFIG_FS_ENCRYPTION
EXT4_ATTR_FEATURE(encryption);
+EXT4_ATTR_FEATURE(test_dummy_encryption_v2);
#endif
#ifdef CONFIG_UNICODE
EXT4_ATTR_FEATURE(casefold);
@@ -308,6 +309,7 @@ static struct attribute *ext4_feat_attrs[] = {
ATTR_LIST(meta_bg_resize),
#ifdef CONFIG_FS_ENCRYPTION
ATTR_LIST(encryption),
+ ATTR_LIST(test_dummy_encryption_v2),
#endif
#ifdef CONFIG_UNICODE
ATTR_LIST(casefold),
diff --git a/fs/ext4/verity.c b/fs/ext4/verity.c
index dc5ec724d889..dec1244dd062 100644
--- a/fs/ext4/verity.c
+++ b/fs/ext4/verity.c
@@ -342,37 +342,6 @@ static int ext4_get_verity_descriptor(struct inode *inode, void *buf,
return desc_size;
}
-/*
- * Prefetch some pages from the file's Merkle tree.
- *
- * This is basically a stripped-down version of __do_page_cache_readahead()
- * which works on pages past i_size.
- */
-static void ext4_merkle_tree_readahead(struct address_space *mapping,
- pgoff_t start_index, unsigned long count)
-{
- LIST_HEAD(pages);
- unsigned int nr_pages = 0;
- struct page *page;
- pgoff_t index;
- struct blk_plug plug;
-
- for (index = start_index; index < start_index + count; index++) {
- page = xa_load(&mapping->i_pages, index);
- if (!page || xa_is_value(page)) {
- page = __page_cache_alloc(readahead_gfp_mask(mapping));
- if (!page)
- break;
- page->index = index;
- list_add(&page->lru, &pages);
- nr_pages++;
- }
- }
- blk_start_plug(&plug);
- ext4_mpage_readpages(mapping, &pages, NULL, nr_pages, true);
- blk_finish_plug(&plug);
-}
-
static struct page *ext4_read_merkle_tree_page(struct inode *inode,
pgoff_t index,
unsigned long num_ra_pages)
@@ -386,8 +355,8 @@ static struct page *ext4_read_merkle_tree_page(struct inode *inode,
if (page)
put_page(page);
else if (num_ra_pages > 1)
- ext4_merkle_tree_readahead(inode->i_mapping, index,
- num_ra_pages);
+ page_cache_readahead_unbounded(inode->i_mapping, NULL,
+ index, num_ra_pages, 0);
page = read_mapping_page(inode->i_mapping, index, NULL);
}
return page;
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-26 04:46:08 +0100