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-rw-r--r--fs/fat/fat.h1
-rw-r--r--fs/fat/file.c8
-rw-r--r--fs/fat/inode.c12
-rw-r--r--fs/fat/misc.c5
-rw-r--r--fs/fat/namei_msdos.c6
-rw-r--r--fs/fat/namei_vfat.c12
6 files changed, 29 insertions, 15 deletions
diff --git a/fs/fat/fat.h b/fs/fat/fat.h
index 21664fcf3616..4241e6f39e86 100644
--- a/fs/fat/fat.h
+++ b/fs/fat/fat.h
@@ -86,6 +86,7 @@ struct msdos_sb_info {
const void *dir_ops; /* Opaque; default directory operations */
int dir_per_block; /* dir entries per block */
int dir_per_block_bits; /* log2(dir_per_block) */
+ unsigned int vol_id; /*volume ID*/
int fatent_shift;
struct fatent_operations *fatent_ops;
diff --git a/fs/fat/file.c b/fs/fat/file.c
index b0b632e50ddb..9b104f543056 100644
--- a/fs/fat/file.c
+++ b/fs/fat/file.c
@@ -114,6 +114,12 @@ out:
return err;
}
+static int fat_ioctl_get_volume_id(struct inode *inode, u32 __user *user_attr)
+{
+ struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb);
+ return put_user(sbi->vol_id, user_attr);
+}
+
long fat_generic_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
struct inode *inode = file_inode(filp);
@@ -124,6 +130,8 @@ long fat_generic_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
return fat_ioctl_get_attributes(inode, user_attr);
case FAT_IOCTL_SET_ATTRIBUTES:
return fat_ioctl_set_attributes(filp, user_attr);
+ case FAT_IOCTL_GET_VOLUME_ID:
+ return fat_ioctl_get_volume_id(inode, user_attr);
default:
return -ENOTTY; /* Inappropriate ioctl for device */
}
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 5d4513cb1b3c..11b51bb55b42 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -1415,6 +1415,18 @@ int fat_fill_super(struct super_block *sb, void *data, int silent, int isvfat,
brelse(fsinfo_bh);
}
+ /* interpret volume ID as a little endian 32 bit integer */
+ if (sbi->fat_bits == 32)
+ sbi->vol_id = (((u32)b->fat32.vol_id[0]) |
+ ((u32)b->fat32.vol_id[1] << 8) |
+ ((u32)b->fat32.vol_id[2] << 16) |
+ ((u32)b->fat32.vol_id[3] << 24));
+ else /* fat 16 or 12 */
+ sbi->vol_id = (((u32)b->fat16.vol_id[0]) |
+ ((u32)b->fat16.vol_id[1] << 8) |
+ ((u32)b->fat16.vol_id[2] << 16) |
+ ((u32)b->fat16.vol_id[3] << 24));
+
sbi->dir_per_block = sb->s_blocksize / sizeof(struct msdos_dir_entry);
sbi->dir_per_block_bits = ffs(sbi->dir_per_block) - 1;
diff --git a/fs/fat/misc.c b/fs/fat/misc.c
index 359d307b5507..628e22a5a543 100644
--- a/fs/fat/misc.c
+++ b/fs/fat/misc.c
@@ -30,7 +30,7 @@ void __fat_fs_error(struct super_block *sb, int report, const char *fmt, ...)
va_start(args, fmt);
vaf.fmt = fmt;
vaf.va = &args;
- printk(KERN_ERR "FAT-fs (%s): error, %pV\n", sb->s_id, &vaf);
+ fat_msg(sb, KERN_ERR, "error, %pV", &vaf);
va_end(args);
}
@@ -38,8 +38,7 @@ void __fat_fs_error(struct super_block *sb, int report, const char *fmt, ...)
panic("FAT-fs (%s): fs panic from previous error\n", sb->s_id);
else if (opts->errors == FAT_ERRORS_RO && !(sb->s_flags & MS_RDONLY)) {
sb->s_flags |= MS_RDONLY;
- printk(KERN_ERR "FAT-fs (%s): Filesystem has been "
- "set read-only\n", sb->s_id);
+ fat_msg(sb, KERN_ERR, "Filesystem has been set read-only");
}
}
EXPORT_SYMBOL_GPL(__fat_fs_error);
diff --git a/fs/fat/namei_msdos.c b/fs/fat/namei_msdos.c
index 081b759cff83..a783b0e1272a 100644
--- a/fs/fat/namei_msdos.c
+++ b/fs/fat/namei_msdos.c
@@ -148,8 +148,7 @@ static int msdos_find(struct inode *dir, const unsigned char *name, int len,
* that the existing dentry can be used. The msdos fs routines will
* return ENOENT or EINVAL as appropriate.
*/
-static int msdos_hash(const struct dentry *dentry, const struct inode *inode,
- struct qstr *qstr)
+static int msdos_hash(const struct dentry *dentry, struct qstr *qstr)
{
struct fat_mount_options *options = &MSDOS_SB(dentry->d_sb)->options;
unsigned char msdos_name[MSDOS_NAME];
@@ -165,8 +164,7 @@ static int msdos_hash(const struct dentry *dentry, const struct inode *inode,
* Compare two msdos names. If either of the names are invalid,
* we fall back to doing the standard name comparison.
*/
-static int msdos_cmp(const struct dentry *parent, const struct inode *pinode,
- const struct dentry *dentry, const struct inode *inode,
+static int msdos_cmp(const struct dentry *parent, const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
struct fat_mount_options *options = &MSDOS_SB(parent->d_sb)->options;
diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c
index 2da952036a3d..6df8d3d885e5 100644
--- a/fs/fat/namei_vfat.c
+++ b/fs/fat/namei_vfat.c
@@ -107,8 +107,7 @@ static unsigned int vfat_striptail_len(const struct qstr *qstr)
* that the existing dentry can be used. The vfat fs routines will
* return ENOENT or EINVAL as appropriate.
*/
-static int vfat_hash(const struct dentry *dentry, const struct inode *inode,
- struct qstr *qstr)
+static int vfat_hash(const struct dentry *dentry, struct qstr *qstr)
{
qstr->hash = full_name_hash(qstr->name, vfat_striptail_len(qstr));
return 0;
@@ -120,8 +119,7 @@ static int vfat_hash(const struct dentry *dentry, const struct inode *inode,
* that the existing dentry can be used. The vfat fs routines will
* return ENOENT or EINVAL as appropriate.
*/
-static int vfat_hashi(const struct dentry *dentry, const struct inode *inode,
- struct qstr *qstr)
+static int vfat_hashi(const struct dentry *dentry, struct qstr *qstr)
{
struct nls_table *t = MSDOS_SB(dentry->d_sb)->nls_io;
const unsigned char *name;
@@ -142,8 +140,7 @@ static int vfat_hashi(const struct dentry *dentry, const struct inode *inode,
/*
* Case insensitive compare of two vfat names.
*/
-static int vfat_cmpi(const struct dentry *parent, const struct inode *pinode,
- const struct dentry *dentry, const struct inode *inode,
+static int vfat_cmpi(const struct dentry *parent, const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
struct nls_table *t = MSDOS_SB(parent->d_sb)->nls_io;
@@ -162,8 +159,7 @@ static int vfat_cmpi(const struct dentry *parent, const struct inode *pinode,
/*
* Case sensitive compare of two vfat names.
*/
-static int vfat_cmp(const struct dentry *parent, const struct inode *pinode,
- const struct dentry *dentry, const struct inode *inode,
+static int vfat_cmp(const struct dentry *parent, const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
unsigned int alen, blen;
generated by cgit v1.2.3 (git 2.25.1) at 2026-01-05 23:22:53 +0000