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-rw-r--r--fs/Makefile3
-rw-r--r--fs/ext2/dir.c35
-rw-r--r--fs/ext2/ext2.h16
-rw-r--r--fs/fs_types.c105
4 files changed, 113 insertions, 46 deletions
diff --git a/fs/Makefile b/fs/Makefile
index 293733f61594..23fcd8c164a3 100644
--- a/fs/Makefile
+++ b/fs/Makefile
@@ -12,7 +12,8 @@ obj-y := open.o read_write.o file_table.o super.o \
attr.o bad_inode.o file.o filesystems.o namespace.o \
seq_file.o xattr.o libfs.o fs-writeback.o \
pnode.o splice.o sync.o utimes.o d_path.o \
- stack.o fs_struct.o statfs.o fs_pin.o nsfs.o
+ stack.o fs_struct.o statfs.o fs_pin.o nsfs.o \
+ fs_types.o
ifeq ($(CONFIG_BLOCK),y)
obj-y += buffer.o block_dev.o direct-io.o mpage.o
diff --git a/fs/ext2/dir.c b/fs/ext2/dir.c
index 3b8114def693..13318e255ebf 100644
--- a/fs/ext2/dir.c
+++ b/fs/ext2/dir.c
@@ -252,33 +252,10 @@ ext2_validate_entry(char *base, unsigned offset, unsigned mask)
return (char *)p - base;
}
-static unsigned char ext2_filetype_table[EXT2_FT_MAX] = {
- [EXT2_FT_UNKNOWN] = DT_UNKNOWN,
- [EXT2_FT_REG_FILE] = DT_REG,
- [EXT2_FT_DIR] = DT_DIR,
- [EXT2_FT_CHRDEV] = DT_CHR,
- [EXT2_FT_BLKDEV] = DT_BLK,
- [EXT2_FT_FIFO] = DT_FIFO,
- [EXT2_FT_SOCK] = DT_SOCK,
- [EXT2_FT_SYMLINK] = DT_LNK,
-};
-
-#define S_SHIFT 12
-static unsigned char ext2_type_by_mode[S_IFMT >> S_SHIFT] = {
- [S_IFREG >> S_SHIFT] = EXT2_FT_REG_FILE,
- [S_IFDIR >> S_SHIFT] = EXT2_FT_DIR,
- [S_IFCHR >> S_SHIFT] = EXT2_FT_CHRDEV,
- [S_IFBLK >> S_SHIFT] = EXT2_FT_BLKDEV,
- [S_IFIFO >> S_SHIFT] = EXT2_FT_FIFO,
- [S_IFSOCK >> S_SHIFT] = EXT2_FT_SOCK,
- [S_IFLNK >> S_SHIFT] = EXT2_FT_SYMLINK,
-};
-
static inline void ext2_set_de_type(ext2_dirent *de, struct inode *inode)
{
- umode_t mode = inode->i_mode;
if (EXT2_HAS_INCOMPAT_FEATURE(inode->i_sb, EXT2_FEATURE_INCOMPAT_FILETYPE))
- de->file_type = ext2_type_by_mode[(mode & S_IFMT)>>S_SHIFT];
+ de->file_type = fs_umode_to_ftype(inode->i_mode);
else
de->file_type = 0;
}
@@ -293,14 +270,14 @@ ext2_readdir(struct file *file, struct dir_context *ctx)
unsigned long n = pos >> PAGE_SHIFT;
unsigned long npages = dir_pages(inode);
unsigned chunk_mask = ~(ext2_chunk_size(inode)-1);
- unsigned char *types = NULL;
bool need_revalidate = !inode_eq_iversion(inode, file->f_version);
+ bool has_filetype;
if (pos > inode->i_size - EXT2_DIR_REC_LEN(1))
return 0;
- if (EXT2_HAS_INCOMPAT_FEATURE(sb, EXT2_FEATURE_INCOMPAT_FILETYPE))
- types = ext2_filetype_table;
+ has_filetype =
+ EXT2_HAS_INCOMPAT_FEATURE(sb, EXT2_FEATURE_INCOMPAT_FILETYPE);
for ( ; n < npages; n++, offset = 0) {
char *kaddr, *limit;
@@ -335,8 +312,8 @@ ext2_readdir(struct file *file, struct dir_context *ctx)
if (de->inode) {
unsigned char d_type = DT_UNKNOWN;
- if (types && de->file_type < EXT2_FT_MAX)
- d_type = types[de->file_type];
+ if (has_filetype)
+ d_type = fs_ftype_to_dtype(de->file_type);
if (!dir_emit(ctx, de->name, de->name_len,
le32_to_cpu(de->inode),
diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h
index e770cd100a6a..93fcfe7bbb3b 100644
--- a/fs/ext2/ext2.h
+++ b/fs/ext2/ext2.h
@@ -604,22 +604,6 @@ struct ext2_dir_entry_2 {
};
/*
- * Ext2 directory file types. Only the low 3 bits are used. The
- * other bits are reserved for now.
- */
-enum {
- EXT2_FT_UNKNOWN = 0,
- EXT2_FT_REG_FILE = 1,
- EXT2_FT_DIR = 2,
- EXT2_FT_CHRDEV = 3,
- EXT2_FT_BLKDEV = 4,
- EXT2_FT_FIFO = 5,
- EXT2_FT_SOCK = 6,
- EXT2_FT_SYMLINK = 7,
- EXT2_FT_MAX
-};
-
-/*
* EXT2_DIR_PAD defines the directory entries boundaries
*
* NOTE: It must be a multiple of 4
diff --git a/fs/fs_types.c b/fs/fs_types.c
new file mode 100644
index 000000000000..78365e5dc08c
--- /dev/null
+++ b/fs/fs_types.c
@@ -0,0 +1,105 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/fs.h>
+#include <linux/export.h>
+
+/*
+ * fs on-disk file type to dirent file type conversion
+ */
+static const unsigned char fs_dtype_by_ftype[FT_MAX] = {
+ [FT_UNKNOWN] = DT_UNKNOWN,
+ [FT_REG_FILE] = DT_REG,
+ [FT_DIR] = DT_DIR,
+ [FT_CHRDEV] = DT_CHR,
+ [FT_BLKDEV] = DT_BLK,
+ [FT_FIFO] = DT_FIFO,
+ [FT_SOCK] = DT_SOCK,
+ [FT_SYMLINK] = DT_LNK
+};
+
+/**
+ * fs_ftype_to_dtype() - fs on-disk file type to dirent type.
+ * @filetype: The on-disk file type to convert.
+ *
+ * This function converts the on-disk file type value (FT_*) to the directory
+ * entry type (DT_*).
+ *
+ * Context: Any context.
+ * Return:
+ * * DT_UNKNOWN - Unknown type
+ * * DT_FIFO - FIFO
+ * * DT_CHR - Character device
+ * * DT_DIR - Directory
+ * * DT_BLK - Block device
+ * * DT_REG - Regular file
+ * * DT_LNK - Symbolic link
+ * * DT_SOCK - Local-domain socket
+ */
+unsigned char fs_ftype_to_dtype(unsigned int filetype)
+{
+ if (filetype >= FT_MAX)
+ return DT_UNKNOWN;
+
+ return fs_dtype_by_ftype[filetype];
+}
+EXPORT_SYMBOL_GPL(fs_ftype_to_dtype);
+
+/*
+ * dirent file type to fs on-disk file type conversion
+ * Values not initialized explicitly are FT_UNKNOWN (0).
+ */
+static const unsigned char fs_ftype_by_dtype[DT_MAX] = {
+ [DT_REG] = FT_REG_FILE,
+ [DT_DIR] = FT_DIR,
+ [DT_LNK] = FT_SYMLINK,
+ [DT_CHR] = FT_CHRDEV,
+ [DT_BLK] = FT_BLKDEV,
+ [DT_FIFO] = FT_FIFO,
+ [DT_SOCK] = FT_SOCK,
+};
+
+/**
+ * fs_umode_to_ftype() - file mode to on-disk file type.
+ * @mode: The file mode to convert.
+ *
+ * This function converts the file mode value to the on-disk file type (FT_*).
+ *
+ * Context: Any context.
+ * Return:
+ * * FT_UNKNOWN - Unknown type
+ * * FT_REG_FILE - Regular file
+ * * FT_DIR - Directory
+ * * FT_CHRDEV - Character device
+ * * FT_BLKDEV - Block device
+ * * FT_FIFO - FIFO
+ * * FT_SOCK - Local-domain socket
+ * * FT_SYMLINK - Symbolic link
+ */
+unsigned char fs_umode_to_ftype(umode_t mode)
+{
+ return fs_ftype_by_dtype[S_DT(mode)];
+}
+EXPORT_SYMBOL_GPL(fs_umode_to_ftype);
+
+/**
+ * fs_umode_to_dtype() - file mode to dirent file type.
+ * @mode: The file mode to convert.
+ *
+ * This function converts the file mode value to the directory
+ * entry type (DT_*).
+ *
+ * Context: Any context.
+ * Return:
+ * * DT_UNKNOWN - Unknown type
+ * * DT_FIFO - FIFO
+ * * DT_CHR - Character device
+ * * DT_DIR - Directory
+ * * DT_BLK - Block device
+ * * DT_REG - Regular file
+ * * DT_LNK - Symbolic link
+ * * DT_SOCK - Local-domain socket
+ */
+unsigned char fs_umode_to_dtype(umode_t mode)
+{
+ return fs_ftype_to_dtype(fs_umode_to_ftype(mode));
+}
+EXPORT_SYMBOL_GPL(fs_umode_to_dtype);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-14 12:30:54 +0100