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-rw-r--r--fs/fat/cache.c13
-rw-r--r--fs/fat/dir.c28
-rw-r--r--fs/fat/fat.h22
-rw-r--r--fs/fat/file.c59
-rw-r--r--fs/fat/inode.c43
-rw-r--r--fs/fat/misc.c22
6 files changed, 124 insertions, 63 deletions
diff --git a/fs/fat/cache.c b/fs/fat/cache.c
index 113f0a1e565d..ae8200f84e39 100644
--- a/fs/fat/cache.c
+++ b/fs/fat/cache.c
@@ -242,9 +242,10 @@ int fat_get_cluster(struct inode *inode, int cluster, int *fclus, int *dclus)
while (*fclus < cluster) {
/* prevent the infinite loop of cluster chain */
if (*fclus > limit) {
- fat_fs_error(sb, "%s: detected the cluster chain loop"
- " (i_pos %lld)", __func__,
- MSDOS_I(inode)->i_pos);
+ fat_fs_error_ratelimit(sb,
+ "%s: detected the cluster chain loop"
+ " (i_pos %lld)", __func__,
+ MSDOS_I(inode)->i_pos);
nr = -EIO;
goto out;
}
@@ -253,9 +254,9 @@ int fat_get_cluster(struct inode *inode, int cluster, int *fclus, int *dclus)
if (nr < 0)
goto out;
else if (nr == FAT_ENT_FREE) {
- fat_fs_error(sb, "%s: invalid cluster chain"
- " (i_pos %lld)", __func__,
- MSDOS_I(inode)->i_pos);
+ fat_fs_error_ratelimit(sb, "%s: invalid cluster chain"
+ " (i_pos %lld)", __func__,
+ MSDOS_I(inode)->i_pos);
nr = -EIO;
goto out;
} else if (nr == FAT_ENT_EOF) {
diff --git a/fs/fat/dir.c b/fs/fat/dir.c
index 530b4ca01510..ee42b9e0b16a 100644
--- a/fs/fat/dir.c
+++ b/fs/fat/dir.c
@@ -19,6 +19,7 @@
#include <linux/buffer_head.h>
#include <linux/compat.h>
#include <asm/uaccess.h>
+#include <linux/kernel.h>
#include "fat.h"
/*
@@ -140,28 +141,22 @@ static int uni16_to_x8(unsigned char *ascii, const wchar_t *uni, int len,
{
const wchar_t *ip;
wchar_t ec;
- unsigned char *op, nc;
+ unsigned char *op;
int charlen;
- int k;
ip = uni;
op = ascii;
while (*ip && ((len - NLS_MAX_CHARSET_SIZE) > 0)) {
ec = *ip++;
- if ( (charlen = nls->uni2char(ec, op, NLS_MAX_CHARSET_SIZE)) > 0) {
+ if ((charlen = nls->uni2char(ec, op, NLS_MAX_CHARSET_SIZE)) > 0) {
op += charlen;
len -= charlen;
} else {
if (uni_xlate == 1) {
- *op = ':';
- for (k = 4; k > 0; k--) {
- nc = ec & 0xF;
- op[k] = nc > 9 ? nc + ('a' - 10)
- : nc + '0';
- ec >>= 4;
- }
- op += 5;
+ *op++ = ':';
+ op = pack_hex_byte(op, ec >> 8);
+ op = pack_hex_byte(op, ec);
len -= 5;
} else {
*op++ = '?';
@@ -758,9 +753,10 @@ static int fat_ioctl_readdir(struct inode *inode, struct file *filp,
return ret;
}
-static int fat_dir_ioctl(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg)
+static long fat_dir_ioctl(struct file *filp, unsigned int cmd,
+ unsigned long arg)
{
+ struct inode *inode = filp->f_path.dentry->d_inode;
struct __fat_dirent __user *d1 = (struct __fat_dirent __user *)arg;
int short_only, both;
@@ -774,7 +770,7 @@ static int fat_dir_ioctl(struct inode *inode, struct file *filp,
both = 1;
break;
default:
- return fat_generic_ioctl(inode, filp, cmd, arg);
+ return fat_generic_ioctl(filp, cmd, arg);
}
if (!access_ok(VERIFY_WRITE, d1, sizeof(struct __fat_dirent[2])))
@@ -814,7 +810,7 @@ static long fat_compat_dir_ioctl(struct file *filp, unsigned cmd,
both = 1;
break;
default:
- return -ENOIOCTLCMD;
+ return fat_generic_ioctl(filp, cmd, (unsigned long)arg);
}
if (!access_ok(VERIFY_WRITE, d1, sizeof(struct compat_dirent[2])))
@@ -836,7 +832,7 @@ const struct file_operations fat_dir_operations = {
.llseek = generic_file_llseek,
.read = generic_read_dir,
.readdir = fat_readdir,
- .ioctl = fat_dir_ioctl,
+ .unlocked_ioctl = fat_dir_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = fat_compat_dir_ioctl,
#endif
diff --git a/fs/fat/fat.h b/fs/fat/fat.h
index e6efdfa0f6db..27ac25725954 100644
--- a/fs/fat/fat.h
+++ b/fs/fat/fat.h
@@ -6,6 +6,7 @@
#include <linux/nls.h>
#include <linux/fs.h>
#include <linux/mutex.h>
+#include <linux/ratelimit.h>
#include <linux/msdos_fs.h>
/*
@@ -82,6 +83,8 @@ struct msdos_sb_info {
struct fatent_operations *fatent_ops;
struct inode *fat_inode;
+ struct ratelimit_state ratelimit;
+
spinlock_t inode_hash_lock;
struct hlist_head inode_hashtable[FAT_HASH_SIZE];
};
@@ -298,16 +301,16 @@ extern int fat_free_clusters(struct inode *inode, int cluster);
extern int fat_count_free_clusters(struct super_block *sb);
/* fat/file.c */
-extern int fat_generic_ioctl(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg);
+extern long fat_generic_ioctl(struct file *filp, unsigned int cmd,
+ unsigned long arg);
extern const struct file_operations fat_file_operations;
extern const struct inode_operations fat_file_inode_operations;
extern int fat_setattr(struct dentry * dentry, struct iattr * attr);
-extern void fat_truncate(struct inode *inode);
+extern int fat_setsize(struct inode *inode, loff_t offset);
+extern void fat_truncate_blocks(struct inode *inode, loff_t offset);
extern int fat_getattr(struct vfsmount *mnt, struct dentry *dentry,
struct kstat *stat);
-extern int fat_file_fsync(struct file *file, struct dentry *dentry,
- int datasync);
+extern int fat_file_fsync(struct file *file, int datasync);
/* fat/inode.c */
extern void fat_attach(struct inode *inode, loff_t i_pos);
@@ -322,8 +325,13 @@ extern int fat_fill_super(struct super_block *sb, void *data, int silent,
extern int fat_flush_inodes(struct super_block *sb, struct inode *i1,
struct inode *i2);
/* fat/misc.c */
-extern void fat_fs_error(struct super_block *s, const char *fmt, ...)
- __attribute__ ((format (printf, 2, 3))) __cold;
+extern void
+__fat_fs_error(struct super_block *s, int report, const char *fmt, ...)
+ __attribute__ ((format (printf, 3, 4))) __cold;
+#define fat_fs_error(s, fmt, args...) \
+ __fat_fs_error(s, 1, fmt , ## args)
+#define fat_fs_error_ratelimit(s, fmt, args...) \
+ __fat_fs_error(s, __ratelimit(&MSDOS_SB(s)->ratelimit), fmt , ## args)
extern int fat_clusters_flush(struct super_block *sb);
extern int fat_chain_add(struct inode *inode, int new_dclus, int nr_cluster);
extern void fat_time_fat2unix(struct msdos_sb_info *sbi, struct timespec *ts,
diff --git a/fs/fat/file.c b/fs/fat/file.c
index e8c159de236b..990dfae022e5 100644
--- a/fs/fat/file.c
+++ b/fs/fat/file.c
@@ -8,6 +8,7 @@
#include <linux/capability.h>
#include <linux/module.h>
+#include <linux/compat.h>
#include <linux/mount.h>
#include <linux/time.h>
#include <linux/buffer_head.h>
@@ -114,9 +115,9 @@ out:
return err;
}
-int fat_generic_ioctl(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg)
+long fat_generic_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
+ struct inode *inode = filp->f_path.dentry->d_inode;
u32 __user *user_attr = (u32 __user *)arg;
switch (cmd) {
@@ -129,6 +130,15 @@ int fat_generic_ioctl(struct inode *inode, struct file *filp,
}
}
+#ifdef CONFIG_COMPAT
+static long fat_generic_compat_ioctl(struct file *filp, unsigned int cmd,
+ unsigned long arg)
+
+{
+ return fat_generic_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
+}
+#endif
+
static int fat_file_release(struct inode *inode, struct file *filp)
{
if ((filp->f_mode & FMODE_WRITE) &&
@@ -139,12 +149,12 @@ static int fat_file_release(struct inode *inode, struct file *filp)
return 0;
}
-int fat_file_fsync(struct file *filp, struct dentry *dentry, int datasync)
+int fat_file_fsync(struct file *filp, int datasync)
{
- struct inode *inode = dentry->d_inode;
+ struct inode *inode = filp->f_mapping->host;
int res, err;
- res = simple_fsync(filp, dentry, datasync);
+ res = generic_file_fsync(filp, datasync);
err = sync_mapping_buffers(MSDOS_SB(inode->i_sb)->fat_inode->i_mapping);
return res ? res : err;
@@ -159,7 +169,10 @@ const struct file_operations fat_file_operations = {
.aio_write = generic_file_aio_write,
.mmap = generic_file_mmap,
.release = fat_file_release,
- .ioctl = fat_generic_ioctl,
+ .unlocked_ioctl = fat_generic_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = fat_generic_compat_ioctl,
+#endif
.fsync = fat_file_fsync,
.splice_read = generic_file_splice_read,
};
@@ -270,7 +283,7 @@ static int fat_free(struct inode *inode, int skip)
return fat_free_clusters(inode, free_start);
}
-void fat_truncate(struct inode *inode)
+void fat_truncate_blocks(struct inode *inode, loff_t offset)
{
struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb);
const unsigned int cluster_size = sbi->cluster_size;
@@ -280,10 +293,10 @@ void fat_truncate(struct inode *inode)
* This protects against truncating a file bigger than it was then
* trying to write into the hole.
*/
- if (MSDOS_I(inode)->mmu_private > inode->i_size)
- MSDOS_I(inode)->mmu_private = inode->i_size;
+ if (MSDOS_I(inode)->mmu_private > offset)
+ MSDOS_I(inode)->mmu_private = offset;
- nr_clusters = (inode->i_size + (cluster_size - 1)) >> sbi->cluster_bits;
+ nr_clusters = (offset + (cluster_size - 1)) >> sbi->cluster_bits;
fat_free(inode, nr_clusters);
fat_flush_inodes(inode->i_sb, inode, NULL);
@@ -351,6 +364,18 @@ static int fat_allow_set_time(struct msdos_sb_info *sbi, struct inode *inode)
return 0;
}
+int fat_setsize(struct inode *inode, loff_t offset)
+{
+ int error;
+
+ error = simple_setsize(inode, offset);
+ if (error)
+ return error;
+ fat_truncate_blocks(inode, offset);
+
+ return error;
+}
+
#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)
@@ -365,7 +390,8 @@ int fat_setattr(struct dentry *dentry, struct iattr *attr)
/*
* Expand the file. Since inode_setattr() updates ->i_size
* before calling the ->truncate(), but FAT needs to fill the
- * hole before it.
+ * hole before it. XXX: this is no longer true with new truncate
+ * sequence.
*/
if (attr->ia_valid & ATTR_SIZE) {
if (attr->ia_size > inode->i_size) {
@@ -414,15 +440,20 @@ int fat_setattr(struct dentry *dentry, struct iattr *attr)
attr->ia_valid &= ~ATTR_MODE;
}
- if (attr->ia_valid)
- error = inode_setattr(inode, attr);
+ if (attr->ia_valid & ATTR_SIZE) {
+ error = fat_setsize(inode, attr->ia_size);
+ if (error)
+ goto out;
+ }
+
+ generic_setattr(inode, attr);
+ mark_inode_dirty(inode);
out:
return error;
}
EXPORT_SYMBOL_GPL(fat_setattr);
const struct inode_operations fat_file_inode_operations = {
- .truncate = fat_truncate,
.setattr = fat_setattr,
.getattr = fat_getattr,
};
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 0ce143bd7d56..7bf45aee56d7 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -142,14 +142,29 @@ static int fat_readpages(struct file *file, struct address_space *mapping,
return mpage_readpages(mapping, pages, nr_pages, fat_get_block);
}
+static void fat_write_failed(struct address_space *mapping, loff_t to)
+{
+ struct inode *inode = mapping->host;
+
+ if (to > inode->i_size) {
+ truncate_pagecache(inode, to, inode->i_size);
+ fat_truncate_blocks(inode, inode->i_size);
+ }
+}
+
static int fat_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
{
+ int err;
+
*pagep = NULL;
- return cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
- fat_get_block,
+ err = cont_write_begin_newtrunc(file, mapping, pos, len, flags,
+ pagep, fsdata, fat_get_block,
&MSDOS_I(mapping->host)->mmu_private);
+ if (err < 0)
+ fat_write_failed(mapping, pos + len);
+ return err;
}
static int fat_write_end(struct file *file, struct address_space *mapping,
@@ -159,6 +174,8 @@ static int fat_write_end(struct file *file, struct address_space *mapping,
struct inode *inode = mapping->host;
int err;
err = generic_write_end(file, mapping, pos, len, copied, pagep, fsdata);
+ if (err < len)
+ fat_write_failed(mapping, pos + len);
if (!(err < 0) && !(MSDOS_I(inode)->i_attrs & ATTR_ARCH)) {
inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
MSDOS_I(inode)->i_attrs |= ATTR_ARCH;
@@ -172,7 +189,9 @@ static ssize_t fat_direct_IO(int rw, struct kiocb *iocb,
loff_t offset, unsigned long nr_segs)
{
struct file *file = iocb->ki_filp;
- struct inode *inode = file->f_mapping->host;
+ struct address_space *mapping = file->f_mapping;
+ struct inode *inode = mapping->host;
+ ssize_t ret;
if (rw == WRITE) {
/*
@@ -193,8 +212,12 @@ static ssize_t fat_direct_IO(int rw, struct kiocb *iocb,
* FAT need to use the DIO_LOCKING for avoiding the race
* condition of fat_get_block() and ->truncate().
*/
- return blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
- offset, nr_segs, fat_get_block, NULL);
+ ret = blockdev_direct_IO_newtrunc(rw, iocb, inode, inode->i_sb->s_bdev,
+ iov, offset, nr_segs, fat_get_block, NULL);
+ if (ret < 0 && (rw & WRITE))
+ fat_write_failed(mapping, offset + iov_length(iov, nr_segs));
+
+ return ret;
}
static sector_t _fat_bmap(struct address_space *mapping, sector_t block)
@@ -429,7 +452,7 @@ static void fat_delete_inode(struct inode *inode)
{
truncate_inode_pages(&inode->i_data, 0);
inode->i_size = 0;
- fat_truncate(inode);
+ fat_truncate_blocks(inode, 0);
clear_inode(inode);
}
@@ -1250,6 +1273,8 @@ int fat_fill_super(struct super_block *sb, void *data, int silent,
sb->s_op = &fat_sops;
sb->s_export_op = &fat_export_ops;
sbi->dir_ops = fs_dir_inode_ops;
+ ratelimit_state_init(&sbi->ratelimit, DEFAULT_RATELIMIT_INTERVAL,
+ DEFAULT_RATELIMIT_BURST);
error = parse_options(data, isvfat, silent, &debug, &sbi->options);
if (error)
@@ -1497,10 +1522,8 @@ out_fail:
iput(fat_inode);
if (root_inode)
iput(root_inode);
- if (sbi->nls_io)
- unload_nls(sbi->nls_io);
- if (sbi->nls_disk)
- unload_nls(sbi->nls_disk);
+ unload_nls(sbi->nls_io);
+ unload_nls(sbi->nls_disk);
if (sbi->options.iocharset != fat_default_iocharset)
kfree(sbi->options.iocharset);
sb->s_fs_info = NULL;
diff --git a/fs/fat/misc.c b/fs/fat/misc.c
index d3da05f26465..1fa23f6ffba5 100644
--- a/fs/fat/misc.c
+++ b/fs/fat/misc.c
@@ -20,27 +20,29 @@
* In case the file system is remounted read-only, it can be made writable
* again by remounting it.
*/
-void fat_fs_error(struct super_block *s, const char *fmt, ...)
+void __fat_fs_error(struct super_block *s, int report, const char *fmt, ...)
{
struct fat_mount_options *opts = &MSDOS_SB(s)->options;
va_list args;
- printk(KERN_ERR "FAT: Filesystem error (dev %s)\n", s->s_id);
+ if (report) {
+ printk(KERN_ERR "FAT: Filesystem error (dev %s)\n", s->s_id);
- printk(KERN_ERR " ");
- va_start(args, fmt);
- vprintk(fmt, args);
- va_end(args);
- printk("\n");
+ printk(KERN_ERR " ");
+ va_start(args, fmt);
+ vprintk(fmt, args);
+ va_end(args);
+ printk("\n");
+ }
if (opts->errors == FAT_ERRORS_PANIC)
- panic(" FAT fs panic from previous error\n");
+ panic("FAT: fs panic from previous error\n");
else if (opts->errors == FAT_ERRORS_RO && !(s->s_flags & MS_RDONLY)) {
s->s_flags |= MS_RDONLY;
- printk(KERN_ERR " File system has been set read-only\n");
+ printk(KERN_ERR "FAT: Filesystem has been set read-only\n");
}
}
-EXPORT_SYMBOL_GPL(fat_fs_error);
+EXPORT_SYMBOL_GPL(__fat_fs_error);
/* Flushes the number of free clusters on FAT32 */
/* XXX: Need to write one per FSINFO block. Currently only writes 1 */
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-30 14:31:32 +0000