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-rw-r--r--fs/fat/fat.h20
-rw-r--r--fs/fat/file.c32
-rw-r--r--fs/fat/inode.c19
3 files changed, 40 insertions, 31 deletions
diff --git a/fs/fat/fat.h b/fs/fat/fat.h
index 2b8e94c3eef4..3b4753a024e3 100644
--- a/fs/fat/fat.h
+++ b/fs/fat/fat.h
@@ -117,14 +117,32 @@ static inline struct msdos_inode_info *MSDOS_I(struct inode *inode)
return container_of(inode, struct msdos_inode_info, vfs_inode);
}
+/* Convert attribute bits and a mask to the UNIX mode. */
+static inline mode_t fat_make_mode(struct msdos_sb_info *sbi,
+ u8 attrs, mode_t mode)
+{
+ if (attrs & ATTR_RO)
+ mode &= ~S_IWUGO;
+
+ if (attrs & ATTR_DIR)
+ return (mode & ~sbi->options.fs_dmask) | S_IFDIR;
+ else
+ return (mode & ~sbi->options.fs_fmask) | S_IFREG;
+}
+
/* Return the FAT attribute byte for this inode */
-static inline u8 fat_attr(struct inode *inode)
+static inline u8 fat_make_attrs(struct inode *inode)
{
return ((inode->i_mode & S_IWUGO) ? ATTR_NONE : ATTR_RO) |
(S_ISDIR(inode->i_mode) ? ATTR_DIR : ATTR_NONE) |
MSDOS_I(inode)->i_attrs;
}
+static inline void fat_save_attrs(struct inode *inode, u8 attrs)
+{
+ MSDOS_I(inode)->i_attrs = attrs & ATTR_UNUSED;
+}
+
static inline unsigned char fat_checksum(const __u8 *name)
{
unsigned char s = name[0];
diff --git a/fs/fat/file.c b/fs/fat/file.c
index b21973f266a1..f5a7e907a8fa 100644
--- a/fs/fat/file.c
+++ b/fs/fat/file.c
@@ -27,13 +27,7 @@ int fat_generic_ioctl(struct inode *inode, struct file *filp,
switch (cmd) {
case FAT_IOCTL_GET_ATTRIBUTES:
{
- u32 attr;
-
- if (inode->i_ino == MSDOS_ROOT_INO)
- attr = ATTR_DIR;
- else
- attr = fat_attr(inode);
-
+ u32 attr = fat_make_attrs(inode);
return put_user(attr, user_attr);
}
case FAT_IOCTL_SET_ATTRIBUTES:
@@ -62,20 +56,16 @@ int fat_generic_ioctl(struct inode *inode, struct file *filp,
/* Merge in ATTR_VOLUME and ATTR_DIR */
attr |= (MSDOS_I(inode)->i_attrs & ATTR_VOLUME) |
(is_dir ? ATTR_DIR : 0);
- oldattr = fat_attr(inode);
+ oldattr = fat_make_attrs(inode);
/* Equivalent to a chmod() */
ia.ia_valid = ATTR_MODE | ATTR_CTIME;
ia.ia_ctime = current_fs_time(inode->i_sb);
- if (is_dir) {
- ia.ia_mode = MSDOS_MKMODE(attr,
- S_IRWXUGO & ~sbi->options.fs_dmask)
- | S_IFDIR;
- } else {
- ia.ia_mode = MSDOS_MKMODE(attr,
- (S_IRUGO | S_IWUGO | (inode->i_mode & S_IXUGO))
- & ~sbi->options.fs_fmask)
- | S_IFREG;
+ if (is_dir)
+ ia.ia_mode = fat_make_mode(sbi, attr, S_IRWXUGO);
+ else {
+ ia.ia_mode = fat_make_mode(sbi, attr,
+ S_IRUGO | S_IWUGO | (inode->i_mode & S_IXUGO));
}
/* The root directory has no attributes */
@@ -115,7 +105,7 @@ int fat_generic_ioctl(struct inode *inode, struct file *filp,
inode->i_flags &= S_IMMUTABLE;
}
- MSDOS_I(inode)->i_attrs = attr & ATTR_UNUSED;
+ fat_save_attrs(inode, attr);
mark_inode_dirty(inode);
up:
mnt_drop_write(filp->f_path.mnt);
@@ -274,7 +264,7 @@ static int fat_sanitize_mode(const struct msdos_sb_info *sbi,
/*
* Note, the basic check is already done by a caller of
- * (attr->ia_mode & ~MSDOS_VALID_MODE)
+ * (attr->ia_mode & ~FAT_VALID_MODE)
*/
if (S_ISREG(inode->i_mode))
@@ -314,6 +304,8 @@ static int fat_allow_set_time(struct msdos_sb_info *sbi, struct inode *inode)
}
#define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET)
+/* valid file mode bits */
+#define FAT_VALID_MODE (S_IFREG | S_IFDIR | S_IRWXUGO)
int fat_setattr(struct dentry *dentry, struct iattr *attr)
{
@@ -356,7 +348,7 @@ int fat_setattr(struct dentry *dentry, struct iattr *attr)
((attr->ia_valid & ATTR_GID) &&
(attr->ia_gid != sbi->options.fs_gid)) ||
((attr->ia_valid & ATTR_MODE) &&
- (attr->ia_mode & ~MSDOS_VALID_MODE)))
+ (attr->ia_mode & ~FAT_VALID_MODE)))
error = -EPERM;
if (error) {
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 8e1b75c63c7f..7aaa21cf019a 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -337,8 +337,7 @@ static int fat_fill_inode(struct inode *inode, struct msdos_dir_entry *de)
if ((de->attr & ATTR_DIR) && !IS_FREE(de->name)) {
inode->i_generation &= ~1;
- inode->i_mode = MSDOS_MKMODE(de->attr,
- S_IRWXUGO & ~sbi->options.fs_dmask) | S_IFDIR;
+ inode->i_mode = fat_make_mode(sbi, de->attr, S_IRWXUGO);
inode->i_op = sbi->dir_ops;
inode->i_fop = &fat_dir_operations;
@@ -355,10 +354,9 @@ static int fat_fill_inode(struct inode *inode, struct msdos_dir_entry *de)
inode->i_nlink = fat_subdirs(inode);
} else { /* not a directory */
inode->i_generation |= 1;
- inode->i_mode = MSDOS_MKMODE(de->attr,
- ((sbi->options.showexec && !is_exec(de->name + 8))
- ? S_IRUGO|S_IWUGO : S_IRWXUGO)
- & ~sbi->options.fs_fmask) | S_IFREG;
+ inode->i_mode = fat_make_mode(sbi, de->attr,
+ ((sbi->options.showexec && !is_exec(de->name + 8))
+ ? S_IRUGO|S_IWUGO : S_IRWXUGO));
MSDOS_I(inode)->i_start = le16_to_cpu(de->start);
if (sbi->fat_bits == 32)
MSDOS_I(inode)->i_start |= (le16_to_cpu(de->starthi) << 16);
@@ -374,7 +372,8 @@ static int fat_fill_inode(struct inode *inode, struct msdos_dir_entry *de)
if (sbi->options.sys_immutable)
inode->i_flags |= S_IMMUTABLE;
}
- MSDOS_I(inode)->i_attrs = de->attr & ATTR_UNUSED;
+ fat_save_attrs(inode, de->attr);
+
inode->i_blocks = ((inode->i_size + (sbi->cluster_size - 1))
& ~((loff_t)sbi->cluster_size - 1)) >> 9;
@@ -569,7 +568,7 @@ retry:
raw_entry->size = 0;
else
raw_entry->size = cpu_to_le32(inode->i_size);
- raw_entry->attr = fat_attr(inode);
+ raw_entry->attr = fat_make_attrs(inode);
raw_entry->start = cpu_to_le16(MSDOS_I(inode)->i_logstart);
raw_entry->starthi = cpu_to_le16(MSDOS_I(inode)->i_logstart >> 16);
fat_time_unix2fat(sbi, &inode->i_mtime, &raw_entry->time,
@@ -1105,7 +1104,7 @@ static int fat_read_root(struct inode *inode)
inode->i_gid = sbi->options.fs_gid;
inode->i_version++;
inode->i_generation = 0;
- inode->i_mode = (S_IRWXUGO & ~sbi->options.fs_dmask) | S_IFDIR;
+ inode->i_mode = fat_make_mode(sbi, ATTR_DIR, S_IRWXUGO);
inode->i_op = sbi->dir_ops;
inode->i_fop = &fat_dir_operations;
if (sbi->fat_bits == 32) {
@@ -1122,7 +1121,7 @@ static int fat_read_root(struct inode *inode)
MSDOS_I(inode)->i_logstart = 0;
MSDOS_I(inode)->mmu_private = inode->i_size;
- MSDOS_I(inode)->i_attrs = ATTR_NONE;
+ fat_save_attrs(inode, ATTR_DIR);
inode->i_mtime.tv_sec = inode->i_atime.tv_sec = inode->i_ctime.tv_sec = 0;
inode->i_mtime.tv_nsec = inode->i_atime.tv_nsec = inode->i_ctime.tv_nsec = 0;
inode->i_nlink = fat_subdirs(inode)+2;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-31 00:38:55 +0100