Commit 54ca9be0 authored by Chao Yu's avatar Chao Yu Committed by Jaegeuk Kim
Browse files

f2fs: introduce FAULT_VMALLOC 



Introduce a new fault type FAULT_VMALLOC to simulate no memory error in
f2fs_vmalloc().

Signed-off-by: default avatarChao Yu <chao@kernel.org>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 70dd07c8

Documentation/ABI/testing/sysfs-fs-f2fs

+1 −0
Original line number Diff line number Diff line
@@ -736,6 +736,7 @@ Description: Support configuring fault injection type, should be 
		FAULT_NO_SEGMENT                 0x00100000

		FAULT_INCONSISTENT_FOOTER        0x00200000

		FAULT_TIMEOUT                    0x00400000 (1000ms)

		FAULT_VMALLOC                    0x00800000

		===========================      ==========



What:		/sys/fs/f2fs/<disk>/discard_io_aware_gran

Documentation/filesystems/f2fs.rst

+1 −0
Original line number Diff line number Diff line
@@ -208,6 +208,7 @@ fault_type=%d Support configuring fault injection type, should be 
			 FAULT_NO_SEGMENT                 0x00100000

			 FAULT_INCONSISTENT_FOOTER        0x00200000

			 FAULT_TIMEOUT                    0x00400000 (1000ms)

			 FAULT_VMALLOC                    0x00800000

			 ===========================      ==========

mode=%s			 Control block allocation mode which supports "adaptive"

			 and "lfs". In "lfs" mode, there should be no random

fs/f2fs/compress.c

+5 −4
Original line number Diff line number Diff line
@@ -180,7 +180,8 @@ void f2fs_compress_ctx_add_page(struct compress_ctx *cc, struct folio *folio) 
#ifdef CONFIG_F2FS_FS_LZO

static int lzo_init_compress_ctx(struct compress_ctx *cc)

{

	cc->private = f2fs_vmalloc(LZO1X_MEM_COMPRESS);

	cc->private = f2fs_vmalloc(F2FS_I_SB(cc->inode),

					LZO1X_MEM_COMPRESS);

	if (!cc->private)

		return -ENOMEM;
@@ -247,7 +248,7 @@ static int lz4_init_compress_ctx(struct compress_ctx *cc) 
		size = LZ4HC_MEM_COMPRESS;

#endif



	cc->private = f2fs_vmalloc(size);

	cc->private = f2fs_vmalloc(F2FS_I_SB(cc->inode), size);

	if (!cc->private)

		return -ENOMEM;
@@ -343,7 +344,7 @@ static int zstd_init_compress_ctx(struct compress_ctx *cc) 
	params = zstd_get_params(level, cc->rlen);

	workspace_size = zstd_cstream_workspace_bound(&params.cParams);



	workspace = f2fs_vmalloc(workspace_size);

	workspace = f2fs_vmalloc(F2FS_I_SB(cc->inode), workspace_size);

	if (!workspace)

		return -ENOMEM;
@@ -423,7 +424,7 @@ static int zstd_init_decompress_ctx(struct decompress_io_ctx *dic) 


	workspace_size = zstd_dstream_workspace_bound(max_window_size);



	workspace = f2fs_vmalloc(workspace_size);

	workspace = f2fs_vmalloc(F2FS_I_SB(dic->inode), workspace_size);

	if (!workspace)

		return -ENOMEM;

fs/f2fs/f2fs.h

+5 −1
Original line number Diff line number Diff line
@@ -64,6 +64,7 @@ enum { 
	FAULT_NO_SEGMENT,

	FAULT_INCONSISTENT_FOOTER,

	FAULT_TIMEOUT,

	FAULT_VMALLOC,

	FAULT_MAX,

};
@@ -3532,8 +3533,11 @@ static inline void *f2fs_kvzalloc(struct f2fs_sb_info *sbi, 
	return f2fs_kvmalloc(sbi, size, flags | __GFP_ZERO);

}



static inline void *f2fs_vmalloc(size_t size)

static inline void *f2fs_vmalloc(struct f2fs_sb_info *sbi, size_t size)

{

	if (time_to_inject(sbi, FAULT_VMALLOC))

		return NULL;



	return vmalloc(size);

}

fs/f2fs/super.c

+1 −0
Original line number Diff line number Diff line
@@ -66,6 +66,7 @@ const char *f2fs_fault_name[FAULT_MAX] = { 
	[FAULT_NO_SEGMENT]		= "no free segment",

	[FAULT_INCONSISTENT_FOOTER]	= "inconsistent footer",

	[FAULT_TIMEOUT]			= "timeout",

	[FAULT_VMALLOC]			= "vmalloc",

};



int f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned long rate,