#include <linux/module.h>
#include <linux/slab.h>
#include <linux/time.h>
-#include <linux/msdos_fs.h>
-#include <linux/dirent.h>
#include <linux/smp_lock.h>
#include <linux/buffer_head.h>
#include <linux/compat.h>
#include <asm/uaccess.h>
+#include "fat.h"
static inline loff_t fat_make_i_pos(struct super_block *sb,
struct buffer_head *bh,
*bh = NULL;
iblock = *pos >> sb->s_blocksize_bits;
- err = fat_bmap(dir, iblock, &phys, &mapped_blocks);
+ err = fat_bmap(dir, iblock, &phys, &mapped_blocks, 0);
if (err || !phys)
return -1; /* beyond EOF or error */
*bh = sb_bread(sb, phys);
if (*bh == NULL) {
printk(KERN_ERR "FAT: Directory bread(block %llu) failed\n",
- (unsigned long long)phys);
+ (llu)phys);
/* skip this block */
*pos = (iblock + 1) << sb->s_blocksize_bits;
goto next;
* but ignore that right now.
* Ahem... Stack smashing in ring 0 isn't fun. Fixed.
*/
-static int uni16_to_x8(unsigned char *ascii, wchar_t *uni, int uni_xlate,
- struct nls_table *nls)
+static int uni16_to_x8(unsigned char *ascii, const wchar_t *uni, int len,
+ int uni_xlate, struct nls_table *nls)
{
- wchar_t *ip, ec;
+ const wchar_t *ip;
+ wchar_t ec;
unsigned char *op, nc;
int charlen;
int k;
ip = uni;
op = ascii;
- while (*ip) {
+ while (*ip && ((len - NLS_MAX_CHARSET_SIZE) > 0)) {
ec = *ip++;
if ( (charlen = nls->uni2char(ec, op, NLS_MAX_CHARSET_SIZE)) > 0) {
op += charlen;
+ len -= charlen;
} else {
if (uni_xlate == 1) {
*op = ':';
ec >>= 4;
}
op += 5;
+ len -= 5;
} else {
*op++ = '?';
+ len--;
}
}
- /* We have some slack there, so it's OK */
- if (op>ascii+256) {
- op = ascii + 256;
- break;
- }
}
+
+ if (unlikely(*ip)) {
+ printk(KERN_WARNING "FAT: filename was truncated while "
+ "converting.");
+ }
+
*op = 0;
return (op - ascii);
}
+static inline int fat_uni_to_x8(struct msdos_sb_info *sbi, const wchar_t *uni,
+ unsigned char *buf, int size)
+{
+ if (sbi->options.utf8)
+ return utf8_wcstombs(buf, uni, size);
+ else
+ return uni16_to_x8(buf, uni, size, sbi->options.unicode_xlate,
+ sbi->nls_io);
+}
+
static inline int
fat_short2uni(struct nls_table *t, unsigned char *c, int clen, wchar_t *uni)
{
return len;
}
+static inline int fat_name_match(struct msdos_sb_info *sbi,
+ const unsigned char *a, int a_len,
+ const unsigned char *b, int b_len)
+{
+ if (a_len != b_len)
+ return 0;
+
+ if (sbi->options.name_check != 's')
+ return !nls_strnicmp(sbi->nls_io, a, b, a_len);
+ else
+ return !memcmp(a, b, a_len);
+}
+
enum { PARSE_INVALID = 1, PARSE_NOT_LONGNAME, PARSE_EOF, };
/**
unsigned char id, slot, slots, alias_checksum;
if (!*unicode) {
- *unicode = (wchar_t *)__get_free_page(GFP_KERNEL);
+ *unicode = __getname();
if (!*unicode) {
brelse(*bh);
return -ENOMEM;
}
/*
+ * Maximum buffer size of short name.
+ * [(MSDOS_NAME + '.') * max one char + nul]
+ * For msdos style, ['.' (hidden) + MSDOS_NAME + '.' + nul]
+ */
+#define FAT_MAX_SHORT_SIZE ((MSDOS_NAME + 1) * NLS_MAX_CHARSET_SIZE + 1)
+/*
+ * Maximum buffer size of unicode chars from slots.
+ * [(max longname slots * 13 (size in a slot) + nul) * sizeof(wchar_t)]
+ */
+#define FAT_MAX_UNI_CHARS ((MSDOS_SLOTS - 1) * 13 + 1)
+#define FAT_MAX_UNI_SIZE (FAT_MAX_UNI_CHARS * sizeof(wchar_t))
+
+/*
* Return values: negative -> error, 0 -> not found, positive -> found,
* value is the total amount of slots, including the shortname entry.
*/
struct msdos_sb_info *sbi = MSDOS_SB(sb);
struct buffer_head *bh = NULL;
struct msdos_dir_entry *de;
- struct nls_table *nls_io = sbi->nls_io;
struct nls_table *nls_disk = sbi->nls_disk;
+ unsigned char nr_slots;
wchar_t bufuname[14];
- unsigned char xlate_len, nr_slots;
wchar_t *unicode = NULL;
- unsigned char work[8], bufname[260]; /* 256 + 4 */
- int uni_xlate = sbi->options.unicode_xlate;
- int utf8 = sbi->options.utf8;
- int anycase = (sbi->options.name_check != 's');
+ unsigned char work[MSDOS_NAME];
+ unsigned char bufname[FAT_MAX_SHORT_SIZE];
unsigned short opt_shortname = sbi->options.shortname;
loff_t cpos = 0;
- int chl, i, j, last_u, err;
+ int chl, i, j, last_u, err, len;
err = -ENOENT;
- while(1) {
+ while (1) {
if (fat_get_entry(inode, &cpos, &bh, &de) == -1)
- goto EODir;
+ goto end_of_dir;
parse_record:
nr_slots = 0;
if (de->name[0] == DELETED_FLAG)
if (de->attr == ATTR_EXT) {
int status = fat_parse_long(inode, &cpos, &bh, &de,
&unicode, &nr_slots);
- if (status < 0)
- return status;
- else if (status == PARSE_INVALID)
+ if (status < 0) {
+ err = status;
+ goto end_of_dir;
+ } else if (status == PARSE_INVALID)
continue;
else if (status == PARSE_NOT_LONGNAME)
goto parse_record;
else if (status == PARSE_EOF)
- goto EODir;
+ goto end_of_dir;
}
memcpy(work, de->name, sizeof(de->name));
if (work[0] == 0x05)
work[0] = 0xE5;
for (i = 0, j = 0, last_u = 0; i < 8;) {
- if (!work[i]) break;
+ if (!work[i])
+ break;
chl = fat_shortname2uni(nls_disk, &work[i], 8 - i,
&bufuname[j++], opt_shortname,
de->lcase & CASE_LOWER_BASE);
}
j = last_u;
fat_short2uni(nls_disk, ".", 1, &bufuname[j++]);
- for (i = 0; i < 3;) {
- if (!de->ext[i]) break;
- chl = fat_shortname2uni(nls_disk, &de->ext[i], 3 - i,
+ for (i = 8; i < MSDOS_NAME;) {
+ if (!work[i])
+ break;
+ chl = fat_shortname2uni(nls_disk, &work[i],
+ MSDOS_NAME - i,
&bufuname[j++], opt_shortname,
de->lcase & CASE_LOWER_EXT);
if (chl <= 1) {
- if (de->ext[i] != ' ')
+ if (work[i] != ' ')
last_u = j;
} else {
last_u = j;
if (!last_u)
continue;
+ /* Compare shortname */
bufuname[last_u] = 0x0000;
- xlate_len = utf8
- ?utf8_wcstombs(bufname, bufuname, sizeof(bufname))
- :uni16_to_x8(bufname, bufuname, uni_xlate, nls_io);
- if (xlate_len == name_len)
- if ((!anycase && !memcmp(name, bufname, xlate_len)) ||
- (anycase && !nls_strnicmp(nls_io, name, bufname,
- xlate_len)))
- goto Found;
+ len = fat_uni_to_x8(sbi, bufuname, bufname, sizeof(bufname));
+ if (fat_name_match(sbi, name, name_len, bufname, len))
+ goto found;
if (nr_slots) {
- xlate_len = utf8
- ?utf8_wcstombs(bufname, unicode, sizeof(bufname))
- :uni16_to_x8(bufname, unicode, uni_xlate, nls_io);
- if (xlate_len != name_len)
- continue;
- if ((!anycase && !memcmp(name, bufname, xlate_len)) ||
- (anycase && !nls_strnicmp(nls_io, name, bufname,
- xlate_len)))
- goto Found;
+ void *longname = unicode + FAT_MAX_UNI_CHARS;
+ int size = PATH_MAX - FAT_MAX_UNI_SIZE;
+
+ /* Compare longname */
+ len = fat_uni_to_x8(sbi, unicode, longname, size);
+ if (fat_name_match(sbi, name, name_len, longname, len))
+ goto found;
}
}
-Found:
+found:
nr_slots++; /* include the de */
sinfo->slot_off = cpos - nr_slots * sizeof(*de);
sinfo->nr_slots = nr_slots;
sinfo->bh = bh;
sinfo->i_pos = fat_make_i_pos(sb, sinfo->bh, sinfo->de);
err = 0;
-EODir:
+end_of_dir:
if (unicode)
- free_page((unsigned long)unicode);
+ __putname(unicode);
return err;
}
EXPORT_SYMBOL_GPL(fat_search_long);
struct fat_ioctl_filldir_callback {
- struct dirent __user *dirent;
+ void __user *dirent;
int result;
/* for dir ioctl */
const char *longname;
struct msdos_sb_info *sbi = MSDOS_SB(sb);
struct buffer_head *bh;
struct msdos_dir_entry *de;
- struct nls_table *nls_io = sbi->nls_io;
struct nls_table *nls_disk = sbi->nls_disk;
- unsigned char long_slots;
- const char *fill_name;
- int fill_len;
+ unsigned char nr_slots;
wchar_t bufuname[14];
wchar_t *unicode = NULL;
- unsigned char c, work[8], bufname[56], *ptname = bufname;
- unsigned long lpos, dummy, *furrfu = &lpos;
- int uni_xlate = sbi->options.unicode_xlate;
+ unsigned char c, work[MSDOS_NAME];
+ unsigned char bufname[FAT_MAX_SHORT_SIZE], *ptname = bufname;
+ unsigned short opt_shortname = sbi->options.shortname;
int isvfat = sbi->options.isvfat;
- int utf8 = sbi->options.utf8;
int nocase = sbi->options.nocase;
- unsigned short opt_shortname = sbi->options.shortname;
+ const char *fill_name = NULL;
unsigned long inum;
- int chi, chl, i, i2, j, last, last_u, dotoffset = 0;
+ unsigned long lpos, dummy, *furrfu = &lpos;
loff_t cpos;
+ int chi, chl, i, i2, j, last, last_u, dotoffset = 0, fill_len = 0;
int ret = 0;
- lock_kernel();
+ lock_super(sb);
cpos = filp->f_pos;
/* Fake . and .. for the root directory. */
cpos = 0;
}
}
- if (cpos & (sizeof(struct msdos_dir_entry)-1)) {
+ if (cpos & (sizeof(struct msdos_dir_entry) - 1)) {
ret = -ENOENT;
goto out;
}
bh = NULL;
-GetNew:
+get_new:
if (fat_get_entry(inode, &cpos, &bh, &de) == -1)
- goto EODir;
+ goto end_of_dir;
parse_record:
- long_slots = 0;
- /* Check for long filename entry */
- if (isvfat) {
+ nr_slots = 0;
+ /*
+ * Check for long filename entry, but if short_only, we don't
+ * need to parse long filename.
+ */
+ if (isvfat && !short_only) {
if (de->name[0] == DELETED_FLAG)
- goto RecEnd;
+ goto record_end;
if (de->attr != ATTR_EXT && (de->attr & ATTR_VOLUME))
- goto RecEnd;
+ goto record_end;
if (de->attr != ATTR_EXT && IS_FREE(de->name))
- goto RecEnd;
+ goto record_end;
} else {
if ((de->attr & ATTR_VOLUME) || IS_FREE(de->name))
- goto RecEnd;
+ goto record_end;
}
if (isvfat && de->attr == ATTR_EXT) {
int status = fat_parse_long(inode, &cpos, &bh, &de,
- &unicode, &long_slots);
+ &unicode, &nr_slots);
if (status < 0) {
filp->f_pos = cpos;
ret = status;
goto out;
} else if (status == PARSE_INVALID)
- goto RecEnd;
+ goto record_end;
else if (status == PARSE_NOT_LONGNAME)
goto parse_record;
else if (status == PARSE_EOF)
- goto EODir;
+ goto end_of_dir;
+
+ if (nr_slots) {
+ void *longname = unicode + FAT_MAX_UNI_CHARS;
+ int size = PATH_MAX - FAT_MAX_UNI_SIZE;
+ int len = fat_uni_to_x8(sbi, unicode, longname, size);
+
+ fill_name = longname;
+ fill_len = len;
+ /* !both && !short_only, so we don't need shortname. */
+ if (!both)
+ goto start_filldir;
+ }
}
if (sbi->options.dotsOK) {
if (work[0] == 0x05)
work[0] = 0xE5;
for (i = 0, j = 0, last = 0, last_u = 0; i < 8;) {
- if (!(c = work[i])) break;
+ if (!(c = work[i]))
+ break;
chl = fat_shortname2uni(nls_disk, &work[i], 8 - i,
&bufuname[j++], opt_shortname,
de->lcase & CASE_LOWER_BASE);
j = last_u;
fat_short2uni(nls_disk, ".", 1, &bufuname[j++]);
ptname[i++] = '.';
- for (i2 = 0; i2 < 3;) {
- if (!(c = de->ext[i2])) break;
- chl = fat_shortname2uni(nls_disk, &de->ext[i2], 3 - i2,
+ for (i2 = 8; i2 < MSDOS_NAME;) {
+ if (!(c = work[i2]))
+ break;
+ chl = fat_shortname2uni(nls_disk, &work[i2], MSDOS_NAME - i2,
&bufuname[j++], opt_shortname,
de->lcase & CASE_LOWER_EXT);
if (chl <= 1) {
}
} else {
last_u = j;
- for (chi = 0; chi < chl && i2 < 3; chi++) {
- ptname[i++] = de->ext[i2++];
+ for (chi = 0; chi < chl && i2 < MSDOS_NAME; chi++) {
+ ptname[i++] = work[i2++];
last = i;
}
}
}
if (!last)
- goto RecEnd;
+ goto record_end;
i = last + dotoffset;
j = last_u;
- lpos = cpos - (long_slots+1)*sizeof(struct msdos_dir_entry);
+ if (isvfat) {
+ bufuname[j] = 0x0000;
+ i = fat_uni_to_x8(sbi, bufuname, bufname, sizeof(bufname));
+ }
+ if (nr_slots) {
+ /* hack for fat_ioctl_filldir() */
+ struct fat_ioctl_filldir_callback *p = dirent;
+
+ p->longname = fill_name;
+ p->long_len = fill_len;
+ p->shortname = bufname;
+ p->short_len = i;
+ fill_name = NULL;
+ fill_len = 0;
+ } else {
+ fill_name = bufname;
+ fill_len = i;
+ }
+
+start_filldir:
+ lpos = cpos - (nr_slots + 1) * sizeof(struct msdos_dir_entry);
if (!memcmp(de->name, MSDOS_DOT, MSDOS_NAME))
inum = inode->i_ino;
else if (!memcmp(de->name, MSDOS_DOTDOT, MSDOS_NAME)) {
- inum = parent_ino(filp->f_dentry);
+ inum = parent_ino(filp->f_path.dentry);
} else {
loff_t i_pos = fat_make_i_pos(sb, bh, de);
struct inode *tmp = fat_iget(sb, i_pos);
inum = iunique(sb, MSDOS_ROOT_INO);
}
- if (isvfat) {
- bufuname[j] = 0x0000;
- i = utf8 ? utf8_wcstombs(bufname, bufuname, sizeof(bufname))
- : uni16_to_x8(bufname, bufuname, uni_xlate, nls_io);
- }
-
- fill_name = bufname;
- fill_len = i;
- if (!short_only && long_slots) {
- /* convert the unicode long name. 261 is maximum size
- * of unicode buffer. (13 * slots + nul) */
- void *longname = unicode + 261;
- int buf_size = PAGE_SIZE - (261 * sizeof(unicode[0]));
- int long_len = utf8
- ? utf8_wcstombs(longname, unicode, buf_size)
- : uni16_to_x8(longname, unicode, uni_xlate, nls_io);
-
- if (!both) {
- fill_name = longname;
- fill_len = long_len;
- } else {
- /* hack for fat_ioctl_filldir() */
- struct fat_ioctl_filldir_callback *p = dirent;
-
- p->longname = longname;
- p->long_len = long_len;
- p->shortname = bufname;
- p->short_len = i;
- fill_name = NULL;
- fill_len = 0;
- }
- }
if (filldir(dirent, fill_name, fill_len, *furrfu, inum,
(de->attr & ATTR_DIR) ? DT_DIR : DT_REG) < 0)
- goto FillFailed;
+ goto fill_failed;
-RecEnd:
+record_end:
furrfu = &lpos;
filp->f_pos = cpos;
- goto GetNew;
-EODir:
+ goto get_new;
+end_of_dir:
filp->f_pos = cpos;
-FillFailed:
+fill_failed:
brelse(bh);
if (unicode)
- free_page((unsigned long)unicode);
+ __putname(unicode);
out:
- unlock_kernel();
+ unlock_super(sb);
return ret;
}
static int fat_readdir(struct file *filp, void *dirent, filldir_t filldir)
{
- struct inode *inode = filp->f_dentry->d_inode;
+ struct inode *inode = filp->f_path.dentry->d_inode;
return __fat_readdir(inode, filp, dirent, filldir, 0, 0);
}
-static int fat_ioctl_filldir(void *__buf, const char *name, int name_len,
- loff_t offset, ino_t ino, unsigned int d_type)
+#define FAT_IOCTL_FILLDIR_FUNC(func, dirent_type) \
+static int func(void *__buf, const char *name, int name_len, \
+ loff_t offset, u64 ino, unsigned int d_type) \
+{ \
+ struct fat_ioctl_filldir_callback *buf = __buf; \
+ struct dirent_type __user *d1 = buf->dirent; \
+ struct dirent_type __user *d2 = d1 + 1; \
+ \
+ if (buf->result) \
+ return -EINVAL; \
+ buf->result++; \
+ \
+ if (name != NULL) { \
+ /* dirent has only short name */ \
+ if (name_len >= sizeof(d1->d_name)) \
+ name_len = sizeof(d1->d_name) - 1; \
+ \
+ if (put_user(0, d2->d_name) || \
+ put_user(0, &d2->d_reclen) || \
+ copy_to_user(d1->d_name, name, name_len) || \
+ put_user(0, d1->d_name + name_len) || \
+ put_user(name_len, &d1->d_reclen)) \
+ goto efault; \
+ } else { \
+ /* dirent has short and long name */ \
+ const char *longname = buf->longname; \
+ int long_len = buf->long_len; \
+ const char *shortname = buf->shortname; \
+ int short_len = buf->short_len; \
+ \
+ if (long_len >= sizeof(d1->d_name)) \
+ long_len = sizeof(d1->d_name) - 1; \
+ if (short_len >= sizeof(d1->d_name)) \
+ short_len = sizeof(d1->d_name) - 1; \
+ \
+ if (copy_to_user(d2->d_name, longname, long_len) || \
+ put_user(0, d2->d_name + long_len) || \
+ put_user(long_len, &d2->d_reclen) || \
+ put_user(ino, &d2->d_ino) || \
+ put_user(offset, &d2->d_off) || \
+ copy_to_user(d1->d_name, shortname, short_len) || \
+ put_user(0, d1->d_name + short_len) || \
+ put_user(short_len, &d1->d_reclen)) \
+ goto efault; \
+ } \
+ return 0; \
+efault: \
+ buf->result = -EFAULT; \
+ return -EFAULT; \
+}
+
+FAT_IOCTL_FILLDIR_FUNC(fat_ioctl_filldir, __fat_dirent)
+
+static int fat_ioctl_readdir(struct inode *inode, struct file *filp,
+ void __user *dirent, filldir_t filldir,
+ int short_only, int both)
{
- struct fat_ioctl_filldir_callback *buf = __buf;
- struct dirent __user *d1 = buf->dirent;
- struct dirent __user *d2 = d1 + 1;
-
- if (buf->result)
- return -EINVAL;
- buf->result++;
-
- if (name != NULL) {
- /* dirent has only short name */
- if (name_len >= sizeof(d1->d_name))
- name_len = sizeof(d1->d_name) - 1;
-
- if (put_user(0, d2->d_name) ||
- put_user(0, &d2->d_reclen) ||
- copy_to_user(d1->d_name, name, name_len) ||
- put_user(0, d1->d_name + name_len) ||
- put_user(name_len, &d1->d_reclen))
- goto efault;
- } else {
- /* dirent has short and long name */
- const char *longname = buf->longname;
- int long_len = buf->long_len;
- const char *shortname = buf->shortname;
- int short_len = buf->short_len;
-
- if (long_len >= sizeof(d1->d_name))
- long_len = sizeof(d1->d_name) - 1;
- if (short_len >= sizeof(d1->d_name))
- short_len = sizeof(d1->d_name) - 1;
-
- if (copy_to_user(d2->d_name, longname, long_len) ||
- put_user(0, d2->d_name + long_len) ||
- put_user(long_len, &d2->d_reclen) ||
- put_user(ino, &d2->d_ino) ||
- put_user(offset, &d2->d_off) ||
- copy_to_user(d1->d_name, shortname, short_len) ||
- put_user(0, d1->d_name + short_len) ||
- put_user(short_len, &d1->d_reclen))
- goto efault;
+ struct fat_ioctl_filldir_callback buf;
+ int ret;
+
+ buf.dirent = dirent;
+ buf.result = 0;
+ mutex_lock(&inode->i_mutex);
+ ret = -ENOENT;
+ if (!IS_DEADDIR(inode)) {
+ ret = __fat_readdir(inode, filp, &buf, filldir,
+ short_only, both);
}
- return 0;
-efault:
- buf->result = -EFAULT;
- return -EFAULT;
+ mutex_unlock(&inode->i_mutex);
+ if (ret >= 0)
+ ret = buf.result;
+ return ret;
}
-static int fat_dir_ioctl(struct inode * inode, struct file * filp,
- unsigned int cmd, unsigned long arg)
+static int fat_dir_ioctl(struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long arg)
{
- struct fat_ioctl_filldir_callback buf;
- struct dirent __user *d1;
- int ret, short_only, both;
+ struct __fat_dirent __user *d1 = (struct __fat_dirent __user *)arg;
+ int short_only, both;
switch (cmd) {
case VFAT_IOCTL_READDIR_SHORT:
return fat_generic_ioctl(inode, filp, cmd, arg);
}
- d1 = (struct dirent __user *)arg;
- if (!access_ok(VERIFY_WRITE, d1, sizeof(struct dirent[2])))
+ if (!access_ok(VERIFY_WRITE, d1, sizeof(struct __fat_dirent[2])))
return -EFAULT;
/*
* Yes, we don't need this put_user() absolutely. However old
if (put_user(0, &d1->d_reclen))
return -EFAULT;
- buf.dirent = d1;
- buf.result = 0;
- mutex_lock(&inode->i_mutex);
- ret = -ENOENT;
- if (!IS_DEADDIR(inode)) {
- ret = __fat_readdir(inode, filp, &buf, fat_ioctl_filldir,
- short_only, both);
- }
- mutex_unlock(&inode->i_mutex);
- if (ret >= 0)
- ret = buf.result;
- return ret;
+ return fat_ioctl_readdir(inode, filp, d1, fat_ioctl_filldir,
+ short_only, both);
}
#ifdef CONFIG_COMPAT
#define VFAT_IOCTL_READDIR_BOTH32 _IOR('r', 1, struct compat_dirent[2])
#define VFAT_IOCTL_READDIR_SHORT32 _IOR('r', 2, struct compat_dirent[2])
-static long fat_compat_put_dirent32(struct dirent *d,
- struct compat_dirent __user *d32)
-{
- if (!access_ok(VERIFY_WRITE, d32, sizeof(struct compat_dirent)))
- return -EFAULT;
-
- __put_user(d->d_ino, &d32->d_ino);
- __put_user(d->d_off, &d32->d_off);
- __put_user(d->d_reclen, &d32->d_reclen);
- if (__copy_to_user(d32->d_name, d->d_name, d->d_reclen))
- return -EFAULT;
-
- return 0;
-}
+FAT_IOCTL_FILLDIR_FUNC(fat_compat_ioctl_filldir, compat_dirent)
-static long fat_compat_dir_ioctl(struct file *file, unsigned cmd,
+static long fat_compat_dir_ioctl(struct file *filp, unsigned cmd,
unsigned long arg)
{
- struct compat_dirent __user *p = compat_ptr(arg);
- int ret;
- mm_segment_t oldfs = get_fs();
- struct dirent d[2];
+ struct inode *inode = filp->f_path.dentry->d_inode;
+ struct compat_dirent __user *d1 = compat_ptr(arg);
+ int short_only, both;
switch (cmd) {
- case VFAT_IOCTL_READDIR_BOTH32:
- cmd = VFAT_IOCTL_READDIR_BOTH;
- break;
case VFAT_IOCTL_READDIR_SHORT32:
- cmd = VFAT_IOCTL_READDIR_SHORT;
+ short_only = 1;
+ both = 0;
+ break;
+ case VFAT_IOCTL_READDIR_BOTH32:
+ short_only = 0;
+ both = 1;
break;
default:
return -ENOIOCTLCMD;
}
- set_fs(KERNEL_DS);
- lock_kernel();
- ret = fat_dir_ioctl(file->f_dentry->d_inode, file,
- cmd, (unsigned long) &d);
- unlock_kernel();
- set_fs(oldfs);
- if (ret >= 0) {
- ret |= fat_compat_put_dirent32(&d[0], p);
- ret |= fat_compat_put_dirent32(&d[1], p + 1);
- }
- return ret;
+ if (!access_ok(VERIFY_WRITE, d1, sizeof(struct compat_dirent[2])))
+ return -EFAULT;
+ /*
+ * Yes, we don't need this put_user() absolutely. However old
+ * code didn't return the right value. So, app use this value,
+ * in order to check whether it is EOF.
+ */
+ if (put_user(0, &d1->d_reclen))
+ return -EFAULT;
+
+ return fat_ioctl_readdir(inode, filp, d1, fat_compat_ioctl_filldir,
+ short_only, both);
}
#endif /* CONFIG_COMPAT */
const struct file_operations fat_dir_operations = {
+ .llseek = generic_file_llseek,
.read = generic_read_dir,
.readdir = fat_readdir,
.ioctl = fat_dir_ioctl,
struct msdos_dir_entry *de;
sector_t blknr;
__le16 date, time;
+ u8 time_cs;
int err, cluster;
err = fat_alloc_clusters(dir, &cluster, 1);
goto error_free;
}
- fat_date_unix2dos(ts->tv_sec, &time, &date);
+ fat_time_unix2fat(sbi, ts, &time, &date, &time_cs);
de = (struct msdos_dir_entry *)bhs[0]->b_data;
/* filling the new directory slots ("." and ".." entries) */
de[0].lcase = de[1].lcase = 0;
de[0].time = de[1].time = time;
de[0].date = de[1].date = date;
- de[0].ctime_cs = de[1].ctime_cs = 0;
if (sbi->options.isvfat) {
/* extra timestamps */
de[0].ctime = de[1].ctime = time;
+ de[0].ctime_cs = de[1].ctime_cs = time_cs;
de[0].adate = de[0].cdate = de[1].adate = de[1].cdate = date;
} else {
de[0].ctime = de[1].ctime = 0;
+ de[0].ctime_cs = de[1].ctime_cs = 0;
de[0].adate = de[0].cdate = de[1].adate = de[1].cdate = 0;
}
de[0].start = cpu_to_le16(cluster);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff