dir.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:19k
- /*
- * linux/fs/fat/dir.c
- *
- * directory handling functions for fat-based filesystems
- *
- * Written 1992,1993 by Werner Almesberger
- *
- * Hidden files 1995 by Albert Cahalan <albert@ccs.neu.edu> <adc@coe.neu.edu>
- *
- * VFAT extensions by Gordon Chaffee <chaffee@plateau.cs.berkeley.edu>
- * Merged with msdos fs by Henrik Storner <storner@osiris.ping.dk>
- * Rewritten for constant inumbers. Plugged buffer overrun in readdir(). AV
- * Short name translation 1999, 2001 by Wolfram Pienkoss <wp@bszh.de>
- */
- #include <linux/fs.h>
- #include <linux/msdos_fs.h>
- #include <linux/nls.h>
- #include <linux/kernel.h>
- #include <linux/errno.h>
- #include <linux/stat.h>
- #include <linux/string.h>
- #include <linux/ioctl.h>
- #include <linux/dirent.h>
- #include <linux/mm.h>
- #include <linux/ctype.h>
- #include <asm/uaccess.h>
- #define PRINTK(X)
- struct file_operations fat_dir_operations = {
- read: generic_read_dir,
- readdir: fat_readdir,
- ioctl: fat_dir_ioctl,
- fsync: file_fsync,
- };
- /*
- * Convert Unicode 16 to UTF8, 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
- * of Unicode value. This lets us do a full dump and restore of Unicode
- * filenames. We could get into some trouble with long Unicode names,
- * 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)
- {
- wchar_t *ip, ec;
- unsigned char *op, nc;
- int charlen;
- int k;
- ip = uni;
- op = ascii;
- while (*ip) {
- ec = *ip++;
- if ( (charlen = nls->uni2char(ec, op, NLS_MAX_CHARSET_SIZE)) > 0) {
- op += 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;
- } else {
- *op++ = '?';
- }
- }
- /* We have some slack there, so it's OK */
- if (op>ascii+256) {
- op = ascii + 256;
- break;
- }
- }
- *op = 0;
- 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)
- {
- int charlen;
- charlen = t->char2uni(c, clen, uni);
- if (charlen < 0) {
- *uni = 0x003f; /* a question mark */
- charlen = 1;
- }
- return charlen;
- }
- static inline int
- fat_short2lower_uni(struct nls_table *t, unsigned char *c, int clen, wchar_t *uni)
- {
- int charlen;
- wchar_t wc;
- charlen = t->char2uni(c, clen, &wc);
- if (charlen < 0) {
- *uni = 0x003f; /* a question mark */
- 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;
- }
- static inline int
- fat_shortname2uni(struct nls_table *nls, char *buf, int buf_size,
- wchar_t *uni_buf, unsigned short opt, int lower)
- {
- int len = 0;
- if (opt & VFAT_SFN_DISPLAY_LOWER)
- len = fat_short2lower_uni(nls, buf, buf_size, uni_buf);
- else if (opt & VFAT_SFN_DISPLAY_WIN95)
- len = fat_short2uni(nls, buf, buf_size, uni_buf);
- else if (opt & VFAT_SFN_DISPLAY_WINNT) {
- if (lower)
- len = fat_short2lower_uni(nls, buf, buf_size, uni_buf);
- else
- len = fat_short2uni(nls, buf, buf_size, uni_buf);
- } else
- len = fat_short2uni(nls, buf, buf_size, uni_buf);
- return len;
- }
- /*
- * 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 char *name, int name_len,
- int anycase, loff_t *spos, loff_t *lpos)
- {
- struct super_block *sb = inode->i_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;
- wchar_t bufuname[14];
- unsigned char xlate_len, long_slots;
- wchar_t *unicode = NULL;
- 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 ino, chl, i, j, last_u, res = 0;
- loff_t cpos = 0;
- while(1) {
- if (fat_get_entry(inode,&cpos,&bh,&de,&ino) == -1)
- goto EODir;
- parse_record:
- long_slots = 0;
- if (de->name[0] == (__s8) DELETED_FLAG)
- continue;
- if (de->attr != ATTR_EXT && (de->attr & ATTR_VOLUME))
- continue;
- 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) {
- fat_brelse(sb, 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) */
- 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,&ino)<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] == (__s8) 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;
- }
- for (i = 0; i < 8; i++) {
- /* see namei.c, msdos_format_name */
- if (de->name[i] == 0x05)
- work[i] = 0xE5;
- else
- work[i] = de->name[i];
- }
- for (i = 0, j = 0, last_u = 0; i < 8;) {
- if (!work[i]) break;
- chl = fat_shortname2uni(nls_disk, &work[i], 8 - i,
- &bufuname[j++], opt_shortname,
- de->lcase & CASE_LOWER_BASE);
- if (chl <= 1) {
- if (work[i] != ' ')
- last_u = j;
- } else {
- last_u = j;
- }
- i += chl;
- }
- 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,
- &bufuname[j++], opt_shortname,
- de->lcase & CASE_LOWER_EXT);
- if (chl <= 1) {
- if (de->ext[i] != ' ')
- last_u = j;
- } else {
- last_u = j;
- }
- i += chl;
- }
- if (!last_u)
- continue;
- 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 && !fat_strnicmp(nls_io, name, bufname,
- xlate_len)))
- goto Found;
- if (long_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,
- xlate_len)))
- goto Found;
- }
- }
- Found:
- res = long_slots + 1;
- *spos = cpos - sizeof(struct msdos_dir_entry);
- *lpos = cpos - res*sizeof(struct msdos_dir_entry);
- EODir:
- fat_brelse(sb, bh);
- if (unicode) {
- free_page((unsigned long) unicode);
- }
- return res;
- }
- static int fat_readdirx(struct inode *inode, struct file *filp, void *dirent,
- filldir_t filldir, int shortnames, int both)
- {
- struct super_block *sb = inode->i_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];
- unsigned char long_slots;
- wchar_t *unicode = NULL;
- 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 ino, inum, chi, chl, i, i2, j, last, last_u, dotoffset = 0;
- loff_t cpos;
- cpos = filp->f_pos;
- /* Fake . and .. for the root directory. */
- if (inode->i_ino == MSDOS_ROOT_INO) {
- while (cpos < 2) {
- if (filldir(dirent, "..", cpos+1, cpos, MSDOS_ROOT_INO, DT_DIR) < 0)
- return 0;
- cpos++;
- filp->f_pos++;
- }
- if (cpos == 2) {
- dummy = 2;
- furrfu = &dummy;
- cpos = 0;
- }
- }
- if (cpos & (sizeof(struct msdos_dir_entry)-1))
- return -ENOENT;
- bh = NULL;
- GetNew:
- long_slots = 0;
- if (fat_get_entry(inode,&cpos,&bh,&de,&ino) == -1)
- goto EODir;
- /* Check for long filename entry */
- if (isvfat) {
- if (de->name[0] == (__s8) DELETED_FLAG)
- goto RecEnd;
- if (de->attr != ATTR_EXT && (de->attr & ATTR_VOLUME))
- goto RecEnd;
- if (de->attr != ATTR_EXT && IS_FREE(de->name))
- goto RecEnd;
- } else {
- if ((de->attr & ATTR_VOLUME) || IS_FREE(de->name))
- goto RecEnd;
- }
- 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;
- fat_brelse(sb, bh);
- return -ENOMEM;
- }
- }
- 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,&ino) == -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] == (__s8) DELETED_FLAG)
- goto RecEnd;
- if (de->attr == ATTR_EXT)
- goto ParseLong;
- if (IS_FREE(de->name) || (de->attr & ATTR_VOLUME))
- 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;
- }
- if ((de->attr & ATTR_HIDDEN) && MSDOS_SB(sb)->options.dotsOK) {
- *ptname++ = '.';
- dotoffset = 1;
- }
- for (i = 0; i < 8; i++) {
- /* see namei.c, msdos_format_name */
- if (de->name[i] == 0x05)
- work[i] = 0xE5;
- else
- work[i] = de->name[i];
- }
- for (i = 0, j = 0, last = 0, last_u = 0; i < 8;) {
- if (!(c = work[i])) break;
- chl = fat_shortname2uni(nls_disk, &work[i], 8 - i,
- &bufuname[j++], opt_shortname,
- de->lcase & CASE_LOWER_BASE);
- if (chl <= 1) {
- ptname[i++] = (!nocase && c>='A' && c<='Z') ? c+32 : c;
- if (c != ' ') {
- last = i;
- last_u = j;
- }
- } else {
- last_u = j;
- for (chi = 0; chi < chl && i < 8; chi++) {
- ptname[i] = work[i];
- i++; last = i;
- }
- }
- }
- i = last;
- 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,
- &bufuname[j++], opt_shortname,
- de->lcase & CASE_LOWER_EXT);
- if (chl <= 1) {
- i2++;
- ptname[i++] = (!nocase && c>='A' && c<='Z') ? c+32 : c;
- if (c != ' ') {
- last = i;
- last_u = j;
- }
- } else {
- last_u = j;
- for (chi = 0; chi < chl && i2 < 3; chi++) {
- ptname[i++] = de->ext[i2++];
- last = i;
- }
- }
- }
- if (!last)
- goto RecEnd;
- i = last + dotoffset;
- j = last_u;
- lpos = cpos - (long_slots+1)*sizeof(struct msdos_dir_entry);
- if (!memcmp(de->name,MSDOS_DOT,11))
- inum = inode->i_ino;
- else if (!memcmp(de->name,MSDOS_DOTDOT,11)) {
- /* inum = fat_parent_ino(inode,0); */
- inum = filp->f_dentry->d_parent->d_inode->i_ino;
- } else {
- struct inode *tmp = fat_iget(sb, ino);
- if (tmp) {
- inum = tmp->i_ino;
- iput(tmp);
- } else
- 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);
- }
- if (!long_slots||shortnames) {
- if (both)
- bufname[i] = ' ';
- if (filldir(dirent, bufname, i, *furrfu, inum,
- (de->attr & ATTR_DIR) ? DT_DIR : DT_REG) < 0)
- goto FillFailed;
- } else {
- char longname[275];
- 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;
- }
- if (filldir(dirent, longname, long_len, *furrfu, inum,
- (de->attr & ATTR_DIR) ? DT_DIR : DT_REG) < 0)
- goto FillFailed;
- }
- RecEnd:
- furrfu = &lpos;
- filp->f_pos = cpos;
- goto GetNew;
- EODir:
- filp->f_pos = cpos;
- FillFailed:
- if (bh)
- fat_brelse(sb, bh);
- if (unicode) {
- free_page((unsigned long) unicode);
- }
- return 0;
- }
- 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);
- }
- static int vfat_ioctl_fill(
- void * buf,
- const char * name,
- int name_len,
- loff_t offset,
- ino_t ino,
- unsigned int d_type)
- {
- struct dirent *d1 = (struct dirent *)buf;
- struct dirent *d2 = d1 + 1;
- int len, slen;
- int dotdir;
- get_user(len, &d1->d_reclen);
- if (len != 0) {
- return -1;
- }
- 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) {
- 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);
- slen = name_len - len;
- copy_to_user(d1->d_name, name+len+1, slen);
- put_user(0, d1->d_name+slen);
- put_user(slen, &d1->d_reclen);
- } else {
- 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);
- }
- PRINTK(("FAT d1=%p d2=%p len=%d, name_len=%dn",
- d1, d2, len, name_len));
- return 0;
- }
- int fat_dir_ioctl(struct inode * inode, struct file * filp,
- unsigned int cmd, unsigned long arg)
- {
- int err;
- /*
- * We want to provide an interface for Samba to be able
- * to get the short filename for a given long filename.
- * Samba should use this ioctl instead of readdir() to
- * get the information it needs.
- */
- switch (cmd) {
- case VFAT_IOCTL_READDIR_BOTH: {
- struct dirent *d1 = (struct dirent *)arg;
- err = verify_area(VERIFY_WRITE, d1, sizeof(struct dirent[2]));
- if (err)
- return err;
- put_user(0, &d1->d_reclen);
- return fat_readdirx(inode,filp,(void *)arg,
- vfat_ioctl_fill, 0, 1);
- }
- case VFAT_IOCTL_READDIR_SHORT: {
- struct dirent *d1 = (struct dirent *)arg;
- put_user(0, &d1->d_reclen);
- err = verify_area(VERIFY_WRITE, d1, sizeof(struct dirent[2]));
- if (err)
- return err;
- return fat_readdirx(inode,filp,(void *)arg,
- vfat_ioctl_fill, 1, 1);
- }
- default:
- /* forward ioctl to CVF extension */
- if (MSDOS_SB(inode->i_sb)->cvf_format &&
- MSDOS_SB(inode->i_sb)->cvf_format->cvf_dir_ioctl)
- return MSDOS_SB(inode->i_sb)->cvf_format
- ->cvf_dir_ioctl(inode,filp,cmd,arg);
- return -EINVAL;
- }
- return 0;
- }
- /***** See if directory is empty */
- int fat_dir_empty(struct inode *dir)
- {
- loff_t pos;
- struct buffer_head *bh;
- struct msdos_dir_entry *de;
- int ino,result = 0;
- pos = 0;
- bh = NULL;
- while (fat_get_entry(dir,&pos,&bh,&de,&ino) > -1) {
- /* Ignore vfat longname entries */
- if (de->attr == ATTR_EXT)
- continue;
- if (!IS_FREE(de->name) &&
- strncmp(de->name,MSDOS_DOT , MSDOS_NAME) &&
- strncmp(de->name,MSDOS_DOTDOT, MSDOS_NAME)) {
- result = -ENOTEMPTY;
- break;
- }
- }
- if (bh)
- fat_brelse(dir->i_sb, bh);
- return result;
- }
- /* This assumes that size of cluster is above the 32*slots */
- int fat_add_entries(struct inode *dir,int slots, struct buffer_head **bh,
- struct msdos_dir_entry **de, int *ino)
- {
- 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,ino) > -1) {
- if (IS_FREE((*de)->name)) {
- if (++row == slots)
- return offset;
- } else {
- row = 0;
- offset = curr;
- }
- }
- if ((dir->i_ino == MSDOS_ROOT_INO) && (MSDOS_SB(sb)->fat_bits != 32))
- return -ENOSPC;
- new_bh = fat_extend_dir(dir);
- if (!new_bh)
- return -ENOSPC;
- fat_brelse(sb, new_bh);
- do fat_get_entry(dir,&curr,bh,de,ino); while (++row<slots);
- return offset;
- }
- int fat_new_dir(struct inode *dir, struct inode *parent, int is_vfat)
- {
- struct super_block *sb = dir->i_sb;
- struct buffer_head *bh;
- struct msdos_dir_entry *de;
- __u16 date, time;
- if ((bh = fat_extend_dir(dir)) == NULL) return -ENOSPC;
- /* zeroed out, so... */
- fat_date_unix2dos(dir->i_mtime,&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);
- fat_mark_buffer_dirty(sb, bh);
- fat_brelse(sb, bh);
- dir->i_atime = dir->i_ctime = dir->i_mtime = CURRENT_TIME;
- mark_inode_dirty(dir);
- return 0;
- }
- /*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-indent-level: 8
- * c-brace-imaginary-offset: 0
- * c-brace-offset: -8
- * c-argdecl-indent: 8
- * c-label-offset: -8
- * c-continued-statement-offset: 8
- * c-continued-brace-offset: 0
- * End:
- */