* Short name translation 1999, 2001 by Wolfram Pienkoss <wp@bszh.de>
*/
+#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 <asm/uaccess.h>
-struct file_operations fat_dir_operations = {
- .read = generic_read_dir,
- .readdir = fat_readdir,
- .ioctl = fat_dir_ioctl,
- .fsync = file_fsync,
-};
+static inline loff_t fat_make_i_pos(struct super_block *sb,
+ struct buffer_head *bh,
+ struct msdos_dir_entry *de)
+{
+ return ((loff_t)bh->b_blocknr << MSDOS_SB(sb)->dir_per_block_bits)
+ | (de - (struct msdos_dir_entry *)bh->b_data);
+}
+
+static inline void fat_dir_readahead(struct inode *dir, sector_t iblock,
+ sector_t phys)
+{
+ struct super_block *sb = dir->i_sb;
+ struct msdos_sb_info *sbi = MSDOS_SB(sb);
+ struct buffer_head *bh;
+ int sec;
+
+ /* This is not a first sector of cluster, or sec_per_clus == 1 */
+ if ((iblock & (sbi->sec_per_clus - 1)) || sbi->sec_per_clus == 1)
+ return;
+ /* root dir of FAT12/FAT16 */
+ if ((sbi->fat_bits != 32) && (dir->i_ino == MSDOS_ROOT_INO))
+ return;
+
+ bh = sb_find_get_block(sb, phys);
+ if (bh == NULL || !buffer_uptodate(bh)) {
+ for (sec = 0; sec < sbi->sec_per_clus; sec++)
+ sb_breadahead(sb, phys + sec);
+ }
+ brelse(bh);
+}
+
+/* Returns the inode number of the directory entry at offset pos. If bh is
+ non-NULL, it is brelse'd before. Pos is incremented. The buffer header is
+ returned in bh.
+ AV. Most often we do it item-by-item. Makes sense to optimize.
+ AV. OK, there we go: if both bh and de are non-NULL we assume that we just
+ AV. want the next entry (took one explicit de=NULL in vfat/namei.c).
+ AV. It's done in fat_get_entry() (inlined), here the slow case lives.
+ AV. Additionally, when we return -1 (i.e. reached the end of directory)
+ AV. we make bh NULL.
+ */
+static int fat__get_entry(struct inode *dir, loff_t *pos,
+ struct buffer_head **bh, struct msdos_dir_entry **de)
+{
+ struct super_block *sb = dir->i_sb;
+ sector_t phys, iblock;
+ unsigned long mapped_blocks;
+ int err, offset;
+
+next:
+ if (*bh)
+ brelse(*bh);
+
+ *bh = NULL;
+ iblock = *pos >> sb->s_blocksize_bits;
+ err = fat_bmap(dir, iblock, &phys, &mapped_blocks);
+ if (err || !phys)
+ return -1; /* beyond EOF or error */
+
+ fat_dir_readahead(dir, iblock, phys);
+
+ *bh = sb_bread(sb, phys);
+ if (*bh == NULL) {
+ printk(KERN_ERR "FAT: Directory bread(block %llu) failed\n",
+ (unsigned long long)phys);
+ /* skip this block */
+ *pos = (iblock + 1) << sb->s_blocksize_bits;
+ goto next;
+ }
+
+ offset = *pos & (sb->s_blocksize - 1);
+ *pos += sizeof(struct msdos_dir_entry);
+ *de = (struct msdos_dir_entry *)((*bh)->b_data + offset);
+
+ return 0;
+}
+
+static inline int fat_get_entry(struct inode *dir, loff_t *pos,
+ struct buffer_head **bh,
+ struct msdos_dir_entry **de)
+{
+ /* Fast stuff first */
+ if (*bh && *de &&
+ (*de - (struct msdos_dir_entry *)(*bh)->b_data) < MSDOS_SB(dir->i_sb)->dir_per_block - 1) {
+ *pos += sizeof(struct msdos_dir_entry);
+ (*de)++;
+ return 0;
+ }
+ return fat__get_entry(dir, pos, bh, de);
+}
/*
- * Convert Unicode 16 to UTF8, translated Unicode, or ASCII.
+ * Convert Unicode 16 to UTF-8, translated Unicode, or ASCII.
* If uni_xlate is enabled and we can't get a 1:1 conversion, use a
* colon as an escape character since it is normally invalid on the vfat
* filesystem. The following four characters are the hexadecimal digits
* 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, wchar_t *uni, int uni_xlate,
+ struct nls_table *nls)
{
wchar_t *ip, ec;
unsigned char *op, nc;
return (op - ascii);
}
-#if 0
-static void dump_de(struct msdos_dir_entry *de)
-{
- int i;
- unsigned char *p = (unsigned char *) de;
- printk("[");
-
- for (i = 0; i < 32; i++, p++) {
- printk("%02x ", *p);
- }
- printk("]\n");
-}
-#endif
-
-static inline unsigned char
-fat_tolower(struct nls_table *t, unsigned char c)
-{
- unsigned char nc = t->charset2lower[c];
-
- return nc ? nc : c;
-}
-
static inline int
fat_short2uni(struct nls_table *t, unsigned char *c, int clen, wchar_t *uni)
{
charlen = 1;
} else if (charlen <= 1) {
unsigned char nc = t->charset2lower[*c];
-
+
if (!nc)
nc = *c;
-
+
if ( (charlen = t->char2uni(&nc, 1, uni)) < 0) {
*uni = 0x003f; /* a question mark */
charlen = 1;
}
} else
*uni = wc;
-
- return charlen;
-}
-
-static int
-fat_strnicmp(struct nls_table *t, const unsigned char *s1,
- const unsigned char *s2, int len)
-{
- while(len--)
- if (fat_tolower(t, *s1++) != fat_tolower(t, *s2++))
- return 1;
- return 0;
+ return charlen;
}
static inline int
else if (opt & VFAT_SFN_DISPLAY_WINNT) {
if (lower)
len = fat_short2lower_uni(nls, buf, buf_size, uni_buf);
- else
+ else
len = fat_short2uni(nls, buf, buf_size, uni_buf);
} else
len = fat_short2uni(nls, buf, buf_size, uni_buf);
return len;
}
+enum { PARSE_INVALID = 1, PARSE_NOT_LONGNAME, PARSE_EOF, };
+
+/**
+ * fat_parse_long - Parse extended directory entry.
+ *
+ * This function returns zero on success, negative value on error, or one of
+ * the following:
+ *
+ * %PARSE_INVALID - Directory entry is invalid.
+ * %PARSE_NOT_LONGNAME - Directory entry does not contain longname.
+ * %PARSE_EOF - Directory has no more entries.
+ */
+static int fat_parse_long(struct inode *dir, loff_t *pos,
+ struct buffer_head **bh, struct msdos_dir_entry **de,
+ wchar_t **unicode, unsigned char *nr_slots)
+{
+ struct msdos_dir_slot *ds;
+ unsigned char id, slot, slots, alias_checksum;
+
+ if (!*unicode) {
+ *unicode = (wchar_t *)__get_free_page(GFP_KERNEL);
+ if (!*unicode) {
+ brelse(*bh);
+ return -ENOMEM;
+ }
+ }
+parse_long:
+ slots = 0;
+ ds = (struct msdos_dir_slot *)*de;
+ id = ds->id;
+ if (!(id & 0x40))
+ return PARSE_INVALID;
+ slots = id & ~0x40;
+ if (slots > 20 || !slots) /* ceil(256 * 2 / 26) */
+ return PARSE_INVALID;
+ *nr_slots = slots;
+ alias_checksum = ds->alias_checksum;
+
+ slot = slots;
+ while (1) {
+ int offset;
+
+ slot--;
+ offset = slot * 13;
+ fat16_towchar(*unicode + offset, ds->name0_4, 5);
+ fat16_towchar(*unicode + offset + 5, ds->name5_10, 6);
+ fat16_towchar(*unicode + offset + 11, ds->name11_12, 2);
+
+ if (ds->id & 0x40)
+ (*unicode)[offset + 13] = 0;
+ if (fat_get_entry(dir, pos, bh, de) < 0)
+ return PARSE_EOF;
+ if (slot == 0)
+ break;
+ ds = (struct msdos_dir_slot *)*de;
+ if (ds->attr != ATTR_EXT)
+ return PARSE_NOT_LONGNAME;
+ if ((ds->id & ~0x40) != slot)
+ goto parse_long;
+ if (ds->alias_checksum != alias_checksum)
+ goto parse_long;
+ }
+ if ((*de)->name[0] == DELETED_FLAG)
+ return PARSE_INVALID;
+ if ((*de)->attr == ATTR_EXT)
+ goto parse_long;
+ if (IS_FREE((*de)->name) || ((*de)->attr & ATTR_VOLUME))
+ return PARSE_INVALID;
+ if (fat_checksum((*de)->name) != alias_checksum)
+ *nr_slots = 0;
+
+ return 0;
+}
+
/*
* Return values: negative -> error, 0 -> not found, positive -> found,
* value is the total amount of slots, including the shortname entry.
*/
int fat_search_long(struct inode *inode, const unsigned char *name,
- int name_len, int anycase, loff_t *spos, loff_t *lpos)
+ int name_len, struct fat_slot_info *sinfo)
{
struct super_block *sb = inode->i_sb;
+ struct msdos_sb_info *sbi = MSDOS_SB(sb);
struct buffer_head *bh = NULL;
struct msdos_dir_entry *de;
- struct nls_table *nls_io = MSDOS_SB(sb)->nls_io;
- struct nls_table *nls_disk = MSDOS_SB(sb)->nls_disk;
+ struct nls_table *nls_io = sbi->nls_io;
+ struct nls_table *nls_disk = sbi->nls_disk;
wchar_t bufuname[14];
- unsigned char xlate_len, long_slots;
+ unsigned char xlate_len, nr_slots;
wchar_t *unicode = NULL;
unsigned char work[8], bufname[260]; /* 256 + 4 */
- int uni_xlate = MSDOS_SB(sb)->options.unicode_xlate;
- int utf8 = MSDOS_SB(sb)->options.utf8;
- unsigned short opt_shortname = MSDOS_SB(sb)->options.shortname;
- int chl, i, j, last_u, res = 0;
- loff_t i_pos, cpos = 0;
-
+ int uni_xlate = sbi->options.unicode_xlate;
+ int utf8 = sbi->options.utf8;
+ int anycase = (sbi->options.name_check != 's');
+ unsigned short opt_shortname = sbi->options.shortname;
+ loff_t cpos = 0;
+ int chl, i, j, last_u, err;
+
+ err = -ENOENT;
while(1) {
- if (fat_get_entry(inode,&cpos,&bh,&de,&i_pos) == -1)
+ if (fat_get_entry(inode, &cpos, &bh, &de) == -1)
goto EODir;
parse_record:
- long_slots = 0;
+ nr_slots = 0;
if (de->name[0] == DELETED_FLAG)
continue;
if (de->attr != ATTR_EXT && (de->attr & ATTR_VOLUME))
if (de->attr != ATTR_EXT && IS_FREE(de->name))
continue;
if (de->attr == ATTR_EXT) {
- struct msdos_dir_slot *ds;
- unsigned char id;
- unsigned char slot;
- unsigned char slots;
- unsigned char sum;
- unsigned char alias_checksum;
-
- if (!unicode) {
- unicode = (wchar_t *)
- __get_free_page(GFP_KERNEL);
- if (!unicode) {
- brelse(bh);
- return -ENOMEM;
- }
- }
-parse_long:
- slots = 0;
- ds = (struct msdos_dir_slot *) de;
- id = ds->id;
- if (!(id & 0x40))
- continue;
- slots = id & ~0x40;
- if (slots > 20 || !slots) /* ceil(256 * 2 / 26) */
+ int status = fat_parse_long(inode, &cpos, &bh, &de,
+ &unicode, &nr_slots);
+ if (status < 0)
+ return status;
+ else if (status == PARSE_INVALID)
continue;
- long_slots = slots;
- alias_checksum = ds->alias_checksum;
-
- slot = slots;
- while (1) {
- int offset;
-
- slot--;
- offset = slot * 13;
- fat16_towchar(unicode + offset, ds->name0_4, 5);
- fat16_towchar(unicode + offset + 5, ds->name5_10, 6);
- fat16_towchar(unicode + offset + 11, ds->name11_12, 2);
-
- if (ds->id & 0x40) {
- unicode[offset + 13] = 0;
- }
- if (fat_get_entry(inode,&cpos,&bh,&de,&i_pos)<0)
- goto EODir;
- if (slot == 0)
- break;
- ds = (struct msdos_dir_slot *) de;
- if (ds->attr != ATTR_EXT)
- goto parse_record;
- if ((ds->id & ~0x40) != slot)
- goto parse_long;
- if (ds->alias_checksum != alias_checksum)
- goto parse_long;
- }
- if (de->name[0] == DELETED_FLAG)
- continue;
- if (de->attr == ATTR_EXT)
- goto parse_long;
- if (IS_FREE(de->name) || (de->attr & ATTR_VOLUME))
- continue;
- for (sum = 0, i = 0; i < 11; i++)
- sum = (((sum&1)<<7)|((sum&0xfe)>>1)) + de->name[i];
- if (sum != alias_checksum)
- long_slots = 0;
+ else if (status == PARSE_NOT_LONGNAME)
+ goto parse_record;
+ else if (status == PARSE_EOF)
+ goto EODir;
}
memcpy(work, de->name, sizeof(de->name));
:uni16_to_x8(bufname, bufuname, uni_xlate, nls_io);
if (xlate_len == name_len)
if ((!anycase && !memcmp(name, bufname, xlate_len)) ||
- (anycase && !fat_strnicmp(nls_io, name, bufname,
+ (anycase && !nls_strnicmp(nls_io, name, bufname,
xlate_len)))
goto Found;
- if (long_slots) {
+ 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 && !fat_strnicmp(nls_io, name, bufname,
+ (anycase && !nls_strnicmp(nls_io, name, bufname,
xlate_len)))
goto Found;
}
}
Found:
- res = long_slots + 1;
- *spos = cpos - sizeof(struct msdos_dir_entry);
- *lpos = cpos - res*sizeof(struct msdos_dir_entry);
+ nr_slots++; /* include the de */
+ sinfo->slot_off = cpos - nr_slots * sizeof(*de);
+ sinfo->nr_slots = nr_slots;
+ sinfo->de = de;
+ sinfo->bh = bh;
+ sinfo->i_pos = fat_make_i_pos(sb, sinfo->bh, sinfo->de);
+ err = 0;
EODir:
- brelse(bh);
- if (unicode) {
- free_page((unsigned long) unicode);
- }
- return res;
+ if (unicode)
+ free_page((unsigned long)unicode);
+
+ return err;
}
-static int fat_readdirx(struct inode *inode, struct file *filp, void *dirent,
- filldir_t filldir, int shortnames, int both)
+EXPORT_SYMBOL_GPL(fat_search_long);
+
+struct fat_ioctl_filldir_callback {
+ struct dirent __user *dirent;
+ int result;
+ /* for dir ioctl */
+ const char *longname;
+ int long_len;
+ const char *shortname;
+ int short_len;
+};
+
+static int __fat_readdir(struct inode *inode, struct file *filp, void *dirent,
+ filldir_t filldir, int short_only, int both)
{
struct super_block *sb = inode->i_sb;
+ struct msdos_sb_info *sbi = MSDOS_SB(sb);
struct buffer_head *bh;
struct msdos_dir_entry *de;
- struct nls_table *nls_io = MSDOS_SB(sb)->nls_io;
- struct nls_table *nls_disk = MSDOS_SB(sb)->nls_disk;
- wchar_t bufuname[14];
+ 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;
+ 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 = MSDOS_SB(sb)->options.unicode_xlate;
- int isvfat = MSDOS_SB(sb)->options.isvfat;
- int utf8 = MSDOS_SB(sb)->options.utf8;
- int nocase = MSDOS_SB(sb)->options.nocase;
- unsigned short opt_shortname = MSDOS_SB(sb)->options.shortname;
+ int uni_xlate = sbi->options.unicode_xlate;
+ int isvfat = sbi->options.isvfat;
+ int utf8 = sbi->options.utf8;
+ int nocase = sbi->options.nocase;
+ unsigned short opt_shortname = sbi->options.shortname;
unsigned long inum;
int chi, chl, i, i2, j, last, last_u, dotoffset = 0;
- loff_t i_pos, cpos;
+ loff_t cpos;
int ret = 0;
-
+
lock_kernel();
cpos = filp->f_pos;
goto out;
}
- bh = NULL;
+ bh = NULL;
GetNew:
- long_slots = 0;
- if (fat_get_entry(inode,&cpos,&bh,&de,&i_pos) == -1)
+ if (fat_get_entry(inode, &cpos, &bh, &de) == -1)
goto EODir;
+parse_record:
+ long_slots = 0;
/* Check for long filename entry */
if (isvfat) {
if (de->name[0] == DELETED_FLAG)
}
if (isvfat && de->attr == ATTR_EXT) {
- struct msdos_dir_slot *ds;
- unsigned char id;
- unsigned char slot;
- unsigned char slots;
- unsigned char sum;
- unsigned char alias_checksum;
-
- if (!unicode) {
- unicode = (wchar_t *)
- __get_free_page(GFP_KERNEL);
- if (!unicode) {
- filp->f_pos = cpos;
- brelse(bh);
- ret = -ENOMEM;
- goto out;
- }
- }
-ParseLong:
- slots = 0;
- ds = (struct msdos_dir_slot *) de;
- id = ds->id;
- if (!(id & 0x40))
- goto RecEnd;
- slots = id & ~0x40;
- if (slots > 20 || !slots) /* ceil(256 * 2 / 26) */
- goto RecEnd;
- long_slots = slots;
- alias_checksum = ds->alias_checksum;
-
- slot = slots;
- while (1) {
- int offset;
-
- slot--;
- offset = slot * 13;
- fat16_towchar(unicode + offset, ds->name0_4, 5);
- fat16_towchar(unicode + offset + 5, ds->name5_10, 6);
- fat16_towchar(unicode + offset + 11, ds->name11_12, 2);
-
- if (ds->id & 0x40) {
- unicode[offset + 13] = 0;
- }
- if (fat_get_entry(inode,&cpos,&bh,&de,&i_pos) == -1)
- goto EODir;
- if (slot == 0)
- break;
- ds = (struct msdos_dir_slot *) de;
- if (ds->attr != ATTR_EXT)
- goto RecEnd; /* XXX */
- if ((ds->id & ~0x40) != slot)
- goto ParseLong;
- if (ds->alias_checksum != alias_checksum)
- goto ParseLong;
- }
- if (de->name[0] == DELETED_FLAG)
- goto RecEnd;
- if (de->attr == ATTR_EXT)
- goto ParseLong;
- if (IS_FREE(de->name) || (de->attr & ATTR_VOLUME))
+ int status = fat_parse_long(inode, &cpos, &bh, &de,
+ &unicode, &long_slots);
+ if (status < 0) {
+ filp->f_pos = cpos;
+ ret = status;
+ goto out;
+ } else if (status == PARSE_INVALID)
goto RecEnd;
- for (sum = 0, i = 0; i < 11; i++)
- sum = (((sum&1)<<7)|((sum&0xfe)>>1)) + de->name[i];
- if (sum != alias_checksum)
- long_slots = 0;
+ else if (status == PARSE_NOT_LONGNAME)
+ goto parse_record;
+ else if (status == PARSE_EOF)
+ goto EODir;
}
- if ((de->attr & ATTR_HIDDEN) && MSDOS_SB(sb)->options.dotsOK) {
- *ptname++ = '.';
- dotoffset = 1;
+ if (sbi->options.dotsOK) {
+ ptname = bufname;
+ dotoffset = 0;
+ if (de->attr & ATTR_HIDDEN) {
+ *ptname++ = '.';
+ dotoffset = 1;
+ }
}
memcpy(work, de->name, sizeof(de->name));
j = last_u;
lpos = cpos - (long_slots+1)*sizeof(struct msdos_dir_entry);
- if (!memcmp(de->name,MSDOS_DOT,11))
+ if (!memcmp(de->name, MSDOS_DOT, MSDOS_NAME))
inum = inode->i_ino;
- else if (!memcmp(de->name,MSDOS_DOTDOT,11)) {
+ else if (!memcmp(de->name, MSDOS_DOTDOT, MSDOS_NAME)) {
inum = parent_ino(filp->f_dentry);
} else {
+ loff_t i_pos = fat_make_i_pos(sb, bh, de);
struct inode *tmp = fat_iget(sb, i_pos);
if (tmp) {
inum = tmp->i_ino;
: uni16_to_x8(bufname, bufuname, uni_xlate, nls_io);
}
- if (!long_slots||shortnames) {
- if (both)
- bufname[i] = '\0';
- if (filldir(dirent, bufname, i, *furrfu, inum,
- (de->attr & ATTR_DIR) ? DT_DIR : DT_REG) < 0)
- goto FillFailed;
- } else {
- unsigned char longname[275];
+ 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, sizeof(longname))
- : uni16_to_x8(longname, unicode, uni_xlate,
- nls_io);
- if (both) {
- memcpy(&longname[long_len+1], bufname, i);
- long_len += i;
+ ? 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, longname, long_len, *furrfu, inum,
- (de->attr & ATTR_DIR) ? DT_DIR : DT_REG) < 0)
- goto FillFailed;
}
+ if (filldir(dirent, fill_name, fill_len, *furrfu, inum,
+ (de->attr & ATTR_DIR) ? DT_DIR : DT_REG) < 0)
+ goto FillFailed;
RecEnd:
furrfu = &lpos;
EODir:
filp->f_pos = cpos;
FillFailed:
- if (bh)
- brelse(bh);
- if (unicode) {
- free_page((unsigned long) unicode);
- }
+ brelse(bh);
+ if (unicode)
+ free_page((unsigned long)unicode);
out:
unlock_kernel();
return ret;
}
-int fat_readdir(struct file *filp, void *dirent, filldir_t filldir)
+static int fat_readdir(struct file *filp, void *dirent, filldir_t filldir)
{
struct inode *inode = filp->f_dentry->d_inode;
- return fat_readdirx(inode, filp, dirent, filldir, 0, 0);
+ return __fat_readdir(inode, filp, dirent, filldir, 0, 0);
}
-struct fat_ioctl_filldir_callback {
- struct dirent __user *dirent;
- int result;
-};
-
-static int fat_ioctl_filldir(void *__buf, const char * name, int name_len,
+static int fat_ioctl_filldir(void *__buf, const char *name, int name_len,
loff_t offset, ino_t ino, unsigned int d_type)
{
struct fat_ioctl_filldir_callback *buf = __buf;
struct dirent __user *d1 = buf->dirent;
struct dirent __user *d2 = d1 + 1;
- int len, slen;
- int dotdir;
if (buf->result)
return -EINVAL;
buf->result++;
- if ((name_len == 1 && name[0] == '.') ||
- (name_len == 2 && name[0] == '.' && name[1] == '.')) {
- dotdir = 1;
- len = name_len;
- } else {
- dotdir = 0;
- len = strlen(name);
- }
- if (len != name_len) {
- slen = name_len - len;
- if (copy_to_user(d2->d_name, name, len) ||
- put_user(0, d2->d_name + len) ||
- put_user(len, &d2->d_reclen) ||
- put_user(ino, &d2->d_ino) ||
- put_user(offset, &d2->d_off) ||
- copy_to_user(d1->d_name, name+len+1, slen) ||
- put_user(0, d1->d_name+slen) ||
- put_user(slen, &d1->d_reclen))
- goto efault;
- } else {
+ 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, len) ||
- put_user(0, d1->d_name+len) ||
- put_user(len, &d1->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;
return -EFAULT;
}
-int fat_dir_ioctl(struct inode * inode, struct file * filp,
+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, shortname, both;
+ int ret, short_only, both;
switch (cmd) {
case VFAT_IOCTL_READDIR_SHORT:
- shortname = 1;
- both = 1;
+ short_only = 1;
+ both = 0;
break;
case VFAT_IOCTL_READDIR_BOTH:
- shortname = 0;
+ short_only = 0;
both = 1;
break;
default:
- return -EINVAL;
+ return fat_generic_ioctl(inode, filp, cmd, arg);
}
d1 = (struct dirent __user *)arg;
buf.dirent = d1;
buf.result = 0;
- down(&inode->i_sem);
+ mutex_lock(&inode->i_mutex);
ret = -ENOENT;
if (!IS_DEADDIR(inode)) {
- ret = fat_readdirx(inode, filp, &buf, fat_ioctl_filldir,
- shortname, both);
+ ret = __fat_readdir(inode, filp, &buf, fat_ioctl_filldir,
+ short_only, both);
}
- up(&inode->i_sem);
+ mutex_unlock(&inode->i_mutex);
if (ret >= 0)
ret = buf.result;
return ret;
}
-/* This assumes that size of cluster is above the 32*slots */
+const struct file_operations fat_dir_operations = {
+ .read = generic_read_dir,
+ .readdir = fat_readdir,
+ .ioctl = fat_dir_ioctl,
+ .fsync = file_fsync,
+};
-int fat_add_entries(struct inode *dir,int slots, struct buffer_head **bh,
- struct msdos_dir_entry **de, loff_t *i_pos)
+static int fat_get_short_entry(struct inode *dir, loff_t *pos,
+ struct buffer_head **bh,
+ struct msdos_dir_entry **de)
{
- struct super_block *sb = dir->i_sb;
- loff_t offset, curr;
- int row;
- struct buffer_head *new_bh;
-
- offset = curr = 0;
- *bh = NULL;
- row = 0;
- while (fat_get_entry(dir, &curr, bh, de, i_pos) > -1) {
- /* check the maximum size of directory */
- if (curr >= FAT_MAX_DIR_SIZE) {
- brelse(*bh);
- return -ENOSPC;
- }
-
- if (IS_FREE((*de)->name)) {
- if (++row == slots)
- return offset;
- } else {
- row = 0;
- offset = curr;
- }
+ while (fat_get_entry(dir, pos, bh, de) >= 0) {
+ /* free entry or long name entry or volume label */
+ if (!IS_FREE((*de)->name) && !((*de)->attr & ATTR_VOLUME))
+ return 0;
}
- if ((dir->i_ino == MSDOS_ROOT_INO) && (MSDOS_SB(sb)->fat_bits != 32))
- return -ENOSPC;
- new_bh = fat_extend_dir(dir);
- if (IS_ERR(new_bh))
- return PTR_ERR(new_bh);
- brelse(new_bh);
- do {
- fat_get_entry(dir, &curr, bh, de, i_pos);
- } while (++row < slots);
-
- return offset;
+ return -ENOENT;
}
-int fat_new_dir(struct inode *dir, struct inode *parent, int is_vfat)
+/*
+ * The ".." entry can not provide the "struct fat_slot_info" informations
+ * for inode. So, this function provide the some informations only.
+ */
+int fat_get_dotdot_entry(struct inode *dir, struct buffer_head **bh,
+ struct msdos_dir_entry **de, loff_t *i_pos)
{
- struct buffer_head *bh;
- struct msdos_dir_entry *de;
- __u16 date, time;
-
- bh = fat_extend_dir(dir);
- if (IS_ERR(bh))
- return PTR_ERR(bh);
-
- /* zeroed out, so... */
- fat_date_unix2dos(dir->i_mtime.tv_sec,&time,&date);
- de = (struct msdos_dir_entry*)&bh->b_data[0];
- memcpy(de[0].name,MSDOS_DOT,MSDOS_NAME);
- memcpy(de[1].name,MSDOS_DOTDOT,MSDOS_NAME);
- de[0].attr = de[1].attr = ATTR_DIR;
- de[0].time = de[1].time = CT_LE_W(time);
- de[0].date = de[1].date = CT_LE_W(date);
- if (is_vfat) { /* extra timestamps */
- de[0].ctime = de[1].ctime = CT_LE_W(time);
- de[0].adate = de[0].cdate =
- de[1].adate = de[1].cdate = CT_LE_W(date);
- }
- de[0].start = CT_LE_W(MSDOS_I(dir)->i_logstart);
- de[0].starthi = CT_LE_W(MSDOS_I(dir)->i_logstart>>16);
- de[1].start = CT_LE_W(MSDOS_I(parent)->i_logstart);
- de[1].starthi = CT_LE_W(MSDOS_I(parent)->i_logstart>>16);
- mark_buffer_dirty(bh);
- brelse(bh);
- dir->i_atime = dir->i_ctime = dir->i_mtime = CURRENT_TIME;
- mark_inode_dirty(dir);
+ loff_t offset;
- return 0;
-}
-
-static int fat_get_short_entry(struct inode *dir, loff_t *pos,
- struct buffer_head **bh,
- struct msdos_dir_entry **de, loff_t *i_pos)
-{
- while (fat_get_entry(dir, pos, bh, de, i_pos) >= 0) {
- /* free entry or long name entry or volume label */
- if (!IS_FREE((*de)->name) && !((*de)->attr & ATTR_VOLUME))
+ offset = 0;
+ *bh = NULL;
+ while (fat_get_short_entry(dir, &offset, bh, de) >= 0) {
+ if (!strncmp((*de)->name, MSDOS_DOTDOT, MSDOS_NAME)) {
+ *i_pos = fat_make_i_pos(dir->i_sb, *bh, *de);
return 0;
+ }
}
return -ENOENT;
}
+EXPORT_SYMBOL_GPL(fat_get_dotdot_entry);
+
/* See if directory is empty */
int fat_dir_empty(struct inode *dir)
{
struct buffer_head *bh;
struct msdos_dir_entry *de;
- loff_t cpos, i_pos;
+ loff_t cpos;
int result = 0;
bh = NULL;
cpos = 0;
- while (fat_get_short_entry(dir, &cpos, &bh, &de, &i_pos) >= 0) {
+ while (fat_get_short_entry(dir, &cpos, &bh, &de) >= 0) {
if (strncmp(de->name, MSDOS_DOT , MSDOS_NAME) &&
strncmp(de->name, MSDOS_DOTDOT, MSDOS_NAME)) {
result = -ENOTEMPTY;
return result;
}
+EXPORT_SYMBOL_GPL(fat_dir_empty);
+
/*
* fat_subdirs counts the number of sub-directories of dir. It can be run
* on directories being created.
{
struct buffer_head *bh;
struct msdos_dir_entry *de;
- loff_t cpos, i_pos;
+ loff_t cpos;
int count = 0;
bh = NULL;
cpos = 0;
- while (fat_get_short_entry(dir, &cpos, &bh, &de, &i_pos) >= 0) {
+ while (fat_get_short_entry(dir, &cpos, &bh, &de) >= 0) {
if (de->attr & ATTR_DIR)
count++;
}
* Returns an error code or zero.
*/
int fat_scan(struct inode *dir, const unsigned char *name,
- struct buffer_head **bh, struct msdos_dir_entry **de,
- loff_t *i_pos)
+ struct fat_slot_info *sinfo)
{
- loff_t cpos;
+ struct super_block *sb = dir->i_sb;
- *bh = NULL;
- cpos = 0;
- while (fat_get_short_entry(dir, &cpos, bh, de, i_pos) >= 0) {
- if (!strncmp((*de)->name, name, MSDOS_NAME))
+ sinfo->slot_off = 0;
+ sinfo->bh = NULL;
+ while (fat_get_short_entry(dir, &sinfo->slot_off, &sinfo->bh,
+ &sinfo->de) >= 0) {
+ if (!strncmp(sinfo->de->name, name, MSDOS_NAME)) {
+ sinfo->slot_off -= sizeof(*sinfo->de);
+ sinfo->nr_slots = 1;
+ sinfo->i_pos = fat_make_i_pos(sb, sinfo->bh, sinfo->de);
return 0;
+ }
}
return -ENOENT;
}
+
+EXPORT_SYMBOL_GPL(fat_scan);
+
+static int __fat_remove_entries(struct inode *dir, loff_t pos, int nr_slots)
+{
+ struct super_block *sb = dir->i_sb;
+ struct buffer_head *bh;
+ struct msdos_dir_entry *de, *endp;
+ int err = 0, orig_slots;
+
+ while (nr_slots) {
+ bh = NULL;
+ if (fat_get_entry(dir, &pos, &bh, &de) < 0) {
+ err = -EIO;
+ break;
+ }
+
+ orig_slots = nr_slots;
+ endp = (struct msdos_dir_entry *)(bh->b_data + sb->s_blocksize);
+ while (nr_slots && de < endp) {
+ de->name[0] = DELETED_FLAG;
+ de++;
+ nr_slots--;
+ }
+ mark_buffer_dirty(bh);
+ if (IS_DIRSYNC(dir))
+ err = sync_dirty_buffer(bh);
+ brelse(bh);
+ if (err)
+ break;
+
+ /* pos is *next* de's position, so this does `- sizeof(de)' */
+ pos += ((orig_slots - nr_slots) * sizeof(*de)) - sizeof(*de);
+ }
+
+ return err;
+}
+
+int fat_remove_entries(struct inode *dir, struct fat_slot_info *sinfo)
+{
+ struct msdos_dir_entry *de;
+ struct buffer_head *bh;
+ int err = 0, nr_slots;
+
+ /*
+ * First stage: Remove the shortname. By this, the directory
+ * entry is removed.
+ */
+ nr_slots = sinfo->nr_slots;
+ de = sinfo->de;
+ sinfo->de = NULL;
+ bh = sinfo->bh;
+ sinfo->bh = NULL;
+ while (nr_slots && de >= (struct msdos_dir_entry *)bh->b_data) {
+ de->name[0] = DELETED_FLAG;
+ de--;
+ nr_slots--;
+ }
+ mark_buffer_dirty(bh);
+ if (IS_DIRSYNC(dir))
+ err = sync_dirty_buffer(bh);
+ brelse(bh);
+ if (err)
+ return err;
+ dir->i_version++;
+
+ if (nr_slots) {
+ /*
+ * Second stage: remove the remaining longname slots.
+ * (This directory entry is already removed, and so return
+ * the success)
+ */
+ err = __fat_remove_entries(dir, sinfo->slot_off, nr_slots);
+ if (err) {
+ printk(KERN_WARNING
+ "FAT: Couldn't remove the long name slots\n");
+ }
+ }
+
+ dir->i_mtime = dir->i_atime = CURRENT_TIME_SEC;
+ if (IS_DIRSYNC(dir))
+ (void)fat_sync_inode(dir);
+ else
+ mark_inode_dirty(dir);
+
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(fat_remove_entries);
+
+static int fat_zeroed_cluster(struct inode *dir, sector_t blknr, int nr_used,
+ struct buffer_head **bhs, int nr_bhs)
+{
+ struct super_block *sb = dir->i_sb;
+ sector_t last_blknr = blknr + MSDOS_SB(sb)->sec_per_clus;
+ int err, i, n;
+
+ /* Zeroing the unused blocks on this cluster */
+ blknr += nr_used;
+ n = nr_used;
+ while (blknr < last_blknr) {
+ bhs[n] = sb_getblk(sb, blknr);
+ if (!bhs[n]) {
+ err = -ENOMEM;
+ goto error;
+ }
+ memset(bhs[n]->b_data, 0, sb->s_blocksize);
+ set_buffer_uptodate(bhs[n]);
+ mark_buffer_dirty(bhs[n]);
+
+ n++;
+ blknr++;
+ if (n == nr_bhs) {
+ if (IS_DIRSYNC(dir)) {
+ err = fat_sync_bhs(bhs, n);
+ if (err)
+ goto error;
+ }
+ for (i = 0; i < n; i++)
+ brelse(bhs[i]);
+ n = 0;
+ }
+ }
+ if (IS_DIRSYNC(dir)) {
+ err = fat_sync_bhs(bhs, n);
+ if (err)
+ goto error;
+ }
+ for (i = 0; i < n; i++)
+ brelse(bhs[i]);
+
+ return 0;
+
+error:
+ for (i = 0; i < n; i++)
+ bforget(bhs[i]);
+ return err;
+}
+
+int fat_alloc_new_dir(struct inode *dir, struct timespec *ts)
+{
+ struct super_block *sb = dir->i_sb;
+ struct msdos_sb_info *sbi = MSDOS_SB(sb);
+ struct buffer_head *bhs[MAX_BUF_PER_PAGE];
+ struct msdos_dir_entry *de;
+ sector_t blknr;
+ __le16 date, time;
+ int err, cluster;
+
+ err = fat_alloc_clusters(dir, &cluster, 1);
+ if (err)
+ goto error;
+
+ blknr = fat_clus_to_blknr(sbi, cluster);
+ bhs[0] = sb_getblk(sb, blknr);
+ if (!bhs[0]) {
+ err = -ENOMEM;
+ goto error_free;
+ }
+
+ fat_date_unix2dos(ts->tv_sec, &time, &date);
+
+ de = (struct msdos_dir_entry *)bhs[0]->b_data;
+ /* filling the new directory slots ("." and ".." entries) */
+ memcpy(de[0].name, MSDOS_DOT, MSDOS_NAME);
+ memcpy(de[1].name, MSDOS_DOTDOT, MSDOS_NAME);
+ de->attr = de[1].attr = ATTR_DIR;
+ 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].adate = de[0].cdate = de[1].adate = de[1].cdate = date;
+ } else {
+ de[0].ctime = de[1].ctime = 0;
+ de[0].adate = de[0].cdate = de[1].adate = de[1].cdate = 0;
+ }
+ de[0].start = cpu_to_le16(cluster);
+ de[0].starthi = cpu_to_le16(cluster >> 16);
+ de[1].start = cpu_to_le16(MSDOS_I(dir)->i_logstart);
+ de[1].starthi = cpu_to_le16(MSDOS_I(dir)->i_logstart >> 16);
+ de[0].size = de[1].size = 0;
+ memset(de + 2, 0, sb->s_blocksize - 2 * sizeof(*de));
+ set_buffer_uptodate(bhs[0]);
+ mark_buffer_dirty(bhs[0]);
+
+ err = fat_zeroed_cluster(dir, blknr, 1, bhs, MAX_BUF_PER_PAGE);
+ if (err)
+ goto error_free;
+
+ return cluster;
+
+error_free:
+ fat_free_clusters(dir, cluster);
+error:
+ return err;
+}
+
+EXPORT_SYMBOL_GPL(fat_alloc_new_dir);
+
+static int fat_add_new_entries(struct inode *dir, void *slots, int nr_slots,
+ int *nr_cluster, struct msdos_dir_entry **de,
+ struct buffer_head **bh, loff_t *i_pos)
+{
+ struct super_block *sb = dir->i_sb;
+ struct msdos_sb_info *sbi = MSDOS_SB(sb);
+ struct buffer_head *bhs[MAX_BUF_PER_PAGE];
+ sector_t blknr, start_blknr, last_blknr;
+ unsigned long size, copy;
+ int err, i, n, offset, cluster[2];
+
+ /*
+ * The minimum cluster size is 512bytes, and maximum entry
+ * size is 32*slots (672bytes). So, iff the cluster size is
+ * 512bytes, we may need two clusters.
+ */
+ size = nr_slots * sizeof(struct msdos_dir_entry);
+ *nr_cluster = (size + (sbi->cluster_size - 1)) >> sbi->cluster_bits;
+ BUG_ON(*nr_cluster > 2);
+
+ err = fat_alloc_clusters(dir, cluster, *nr_cluster);
+ if (err)
+ goto error;
+
+ /*
+ * First stage: Fill the directory entry. NOTE: This cluster
+ * is not referenced from any inode yet, so updates order is
+ * not important.
+ */
+ i = n = copy = 0;
+ do {
+ start_blknr = blknr = fat_clus_to_blknr(sbi, cluster[i]);
+ last_blknr = start_blknr + sbi->sec_per_clus;
+ while (blknr < last_blknr) {
+ bhs[n] = sb_getblk(sb, blknr);
+ if (!bhs[n]) {
+ err = -ENOMEM;
+ goto error_nomem;
+ }
+
+ /* fill the directory entry */
+ copy = min(size, sb->s_blocksize);
+ memcpy(bhs[n]->b_data, slots, copy);
+ slots += copy;
+ size -= copy;
+ set_buffer_uptodate(bhs[n]);
+ mark_buffer_dirty(bhs[n]);
+ if (!size)
+ break;
+ n++;
+ blknr++;
+ }
+ } while (++i < *nr_cluster);
+
+ memset(bhs[n]->b_data + copy, 0, sb->s_blocksize - copy);
+ offset = copy - sizeof(struct msdos_dir_entry);
+ get_bh(bhs[n]);
+ *bh = bhs[n];
+ *de = (struct msdos_dir_entry *)((*bh)->b_data + offset);
+ *i_pos = fat_make_i_pos(sb, *bh, *de);
+
+ /* Second stage: clear the rest of cluster, and write outs */
+ err = fat_zeroed_cluster(dir, start_blknr, ++n, bhs, MAX_BUF_PER_PAGE);
+ if (err)
+ goto error_free;
+
+ return cluster[0];
+
+error_free:
+ brelse(*bh);
+ *bh = NULL;
+ n = 0;
+error_nomem:
+ for (i = 0; i < n; i++)
+ bforget(bhs[i]);
+ fat_free_clusters(dir, cluster[0]);
+error:
+ return err;
+}
+
+int fat_add_entries(struct inode *dir, void *slots, int nr_slots,
+ struct fat_slot_info *sinfo)
+{
+ struct super_block *sb = dir->i_sb;
+ struct msdos_sb_info *sbi = MSDOS_SB(sb);
+ struct buffer_head *bh, *prev, *bhs[3]; /* 32*slots (672bytes) */
+ struct msdos_dir_entry *de;
+ int err, free_slots, i, nr_bhs;
+ loff_t pos, i_pos;
+
+ sinfo->nr_slots = nr_slots;
+
+ /* First stage: search free direcotry entries */
+ free_slots = nr_bhs = 0;
+ bh = prev = NULL;
+ pos = 0;
+ err = -ENOSPC;
+ while (fat_get_entry(dir, &pos, &bh, &de) > -1) {
+ /* check the maximum size of directory */
+ if (pos >= FAT_MAX_DIR_SIZE)
+ goto error;
+
+ if (IS_FREE(de->name)) {
+ if (prev != bh) {
+ get_bh(bh);
+ bhs[nr_bhs] = prev = bh;
+ nr_bhs++;
+ }
+ free_slots++;
+ if (free_slots == nr_slots)
+ goto found;
+ } else {
+ for (i = 0; i < nr_bhs; i++)
+ brelse(bhs[i]);
+ prev = NULL;
+ free_slots = nr_bhs = 0;
+ }
+ }
+ if (dir->i_ino == MSDOS_ROOT_INO) {
+ if (sbi->fat_bits != 32)
+ goto error;
+ } else if (MSDOS_I(dir)->i_start == 0) {
+ printk(KERN_ERR "FAT: Corrupted directory (i_pos %lld)\n",
+ MSDOS_I(dir)->i_pos);
+ err = -EIO;
+ goto error;
+ }
+
+found:
+ err = 0;
+ pos -= free_slots * sizeof(*de);
+ nr_slots -= free_slots;
+ if (free_slots) {
+ /*
+ * Second stage: filling the free entries with new entries.
+ * NOTE: If this slots has shortname, first, we write
+ * the long name slots, then write the short name.
+ */
+ int size = free_slots * sizeof(*de);
+ int offset = pos & (sb->s_blocksize - 1);
+ int long_bhs = nr_bhs - (nr_slots == 0);
+
+ /* Fill the long name slots. */
+ for (i = 0; i < long_bhs; i++) {
+ int copy = min_t(int, sb->s_blocksize - offset, size);
+ memcpy(bhs[i]->b_data + offset, slots, copy);
+ mark_buffer_dirty(bhs[i]);
+ offset = 0;
+ slots += copy;
+ size -= copy;
+ }
+ if (long_bhs && IS_DIRSYNC(dir))
+ err = fat_sync_bhs(bhs, long_bhs);
+ if (!err && i < nr_bhs) {
+ /* Fill the short name slot. */
+ int copy = min_t(int, sb->s_blocksize - offset, size);
+ memcpy(bhs[i]->b_data + offset, slots, copy);
+ mark_buffer_dirty(bhs[i]);
+ if (IS_DIRSYNC(dir))
+ err = sync_dirty_buffer(bhs[i]);
+ }
+ for (i = 0; i < nr_bhs; i++)
+ brelse(bhs[i]);
+ if (err)
+ goto error_remove;
+ }
+
+ if (nr_slots) {
+ int cluster, nr_cluster;
+
+ /*
+ * Third stage: allocate the cluster for new entries.
+ * And initialize the cluster with new entries, then
+ * add the cluster to dir.
+ */
+ cluster = fat_add_new_entries(dir, slots, nr_slots, &nr_cluster,
+ &de, &bh, &i_pos);
+ if (cluster < 0) {
+ err = cluster;
+ goto error_remove;
+ }
+ err = fat_chain_add(dir, cluster, nr_cluster);
+ if (err) {
+ fat_free_clusters(dir, cluster);
+ goto error_remove;
+ }
+ if (dir->i_size & (sbi->cluster_size - 1)) {
+ fat_fs_panic(sb, "Odd directory size");
+ dir->i_size = (dir->i_size + sbi->cluster_size - 1)
+ & ~((loff_t)sbi->cluster_size - 1);
+ }
+ dir->i_size += nr_cluster << sbi->cluster_bits;
+ MSDOS_I(dir)->mmu_private += nr_cluster << sbi->cluster_bits;
+ }
+ sinfo->slot_off = pos;
+ sinfo->de = de;
+ sinfo->bh = bh;
+ sinfo->i_pos = fat_make_i_pos(sb, sinfo->bh, sinfo->de);
+
+ return 0;
+
+error:
+ brelse(bh);
+ for (i = 0; i < nr_bhs; i++)
+ brelse(bhs[i]);
+ return err;
+
+error_remove:
+ brelse(bh);
+ if (free_slots)
+ __fat_remove_entries(dir, pos, free_slots);
+ return err;
+}
+
+EXPORT_SYMBOL_GPL(fat_add_entries);
git://git.onelab.eu / linux-2.6.git / blobdiff