| 1 |
1275 |
phoenix |
/*
|
| 2 |
|
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* linux/fs/umsdos/ioctl.c
|
| 3 |
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*
|
| 4 |
|
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* Written 1993 by Jacques Gelinas
|
| 5 |
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*
|
| 6 |
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* Extended MS-DOS ioctl directory handling functions
|
| 7 |
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*/
|
| 8 |
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| 9 |
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#include <asm/uaccess.h>
|
| 10 |
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#include <linux/errno.h>
|
| 11 |
|
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#include <linux/mm.h>
|
| 12 |
|
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#include <linux/kernel.h>
|
| 13 |
|
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#include <linux/sched.h>
|
| 14 |
|
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#include <linux/fs.h>
|
| 15 |
|
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#include <linux/msdos_fs.h>
|
| 16 |
|
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#include <linux/umsdos_fs.h>
|
| 17 |
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|
| 18 |
|
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struct UMSDOS_DIR_ONCE {
|
| 19 |
|
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struct dirent *ent;
|
| 20 |
|
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int count;
|
| 21 |
|
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};
|
| 22 |
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|
|
| 23 |
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/*
|
| 24 |
|
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* Record a single entry the first call.
|
| 25 |
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* Return -EINVAL the next one.
|
| 26 |
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*/
|
| 27 |
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static int umsdos_ioctl_fill (
|
| 28 |
|
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void *buf,
|
| 29 |
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const char *name,
|
| 30 |
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int name_len,
|
| 31 |
|
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loff_t offset,
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| 32 |
|
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ino_t ino,
|
| 33 |
|
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unsigned type)
|
| 34 |
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{
|
| 35 |
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int ret = -EINVAL;
|
| 36 |
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struct UMSDOS_DIR_ONCE *d = (struct UMSDOS_DIR_ONCE *) buf;
|
| 37 |
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|
| 38 |
|
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if (d->count == 0) {
|
| 39 |
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copy_to_user (d->ent->d_name, name, name_len);
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| 40 |
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put_user ('\0', d->ent->d_name + name_len);
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| 41 |
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put_user (name_len, &d->ent->d_reclen);
|
| 42 |
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put_user (ino, &d->ent->d_ino);
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| 43 |
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put_user (offset, &d->ent->d_off);
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| 44 |
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d->count = 1;
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| 45 |
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ret = 0;
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| 46 |
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}
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| 47 |
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return ret;
|
| 48 |
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}
|
| 49 |
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|
| 50 |
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| 51 |
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/*
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| 52 |
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* Perform special function on a directory
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| 53 |
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*/
|
| 54 |
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/* #Specification: ioctl / prototypes
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| 55 |
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* The official prototype for the umsdos ioctl on directory
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| 56 |
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* is:
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| 57 |
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*
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| 58 |
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* int ioctl (
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| 59 |
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* int fd, // File handle of the directory
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| 60 |
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* int cmd, // command
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| 61 |
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* struct umsdos_ioctl *data)
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| 62 |
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*
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| 63 |
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* The struct and the commands are defined in linux/umsdos_fs.h.
|
| 64 |
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*
|
| 65 |
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* umsdos_progs/umsdosio.c provide an interface in C++ to all
|
| 66 |
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* these ioctl. umsdos_progs/udosctl is a small utility showing
|
| 67 |
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* all this.
|
| 68 |
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*
|
| 69 |
|
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* These ioctl generally allow one to work on the EMD or the
|
| 70 |
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* DOS directory independently. These are essential to implement
|
| 71 |
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* the synchronise.
|
| 72 |
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*/
|
| 73 |
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int UMSDOS_ioctl_dir(struct inode *dir, struct file *filp, unsigned int cmd,
|
| 74 |
|
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unsigned long data_ptr)
|
| 75 |
|
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{
|
| 76 |
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struct dentry *dentry = filp->f_dentry;
|
| 77 |
|
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struct umsdos_ioctl *idata = (struct umsdos_ioctl *) data_ptr;
|
| 78 |
|
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int ret;
|
| 79 |
|
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struct umsdos_ioctl data;
|
| 80 |
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|
| 81 |
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Printk(("UMSDOS_ioctl_dir: %s/%s, cmd=%d, data=%08lx\n",
|
| 82 |
|
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dentry->d_parent->d_name.name, dentry->d_name.name, cmd, data_ptr));
|
| 83 |
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|
|
| 84 |
|
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/* forward non-umsdos ioctls - this hopefully doesn't cause conflicts */
|
| 85 |
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if (cmd != UMSDOS_GETVERSION
|
| 86 |
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&& cmd != UMSDOS_READDIR_DOS
|
| 87 |
|
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&& cmd != UMSDOS_READDIR_EMD
|
| 88 |
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&& cmd != UMSDOS_INIT_EMD
|
| 89 |
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&& cmd != UMSDOS_CREAT_EMD
|
| 90 |
|
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&& cmd != UMSDOS_RENAME_DOS
|
| 91 |
|
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&& cmd != UMSDOS_UNLINK_EMD
|
| 92 |
|
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&& cmd != UMSDOS_UNLINK_DOS
|
| 93 |
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&& cmd != UMSDOS_RMDIR_DOS
|
| 94 |
|
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&& cmd != UMSDOS_STAT_DOS
|
| 95 |
|
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&& cmd != UMSDOS_DOS_SETUP)
|
| 96 |
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return fat_dir_ioctl (dir, filp, cmd, data_ptr);
|
| 97 |
|
|
|
| 98 |
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/* #Specification: ioctl / access
|
| 99 |
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* Only root (effective id) is allowed to do IOCTL on directory
|
| 100 |
|
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* in UMSDOS. EPERM is returned for other user.
|
| 101 |
|
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*/
|
| 102 |
|
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/*
|
| 103 |
|
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* Well, not all cases require write access, but it simplifies
|
| 104 |
|
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* the code, and let's face it, there is only one client (umssync)
|
| 105 |
|
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* for all this.
|
| 106 |
|
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*/
|
| 107 |
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ret = verify_area (VERIFY_WRITE, (void *) data_ptr,
|
| 108 |
|
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sizeof (struct umsdos_ioctl));
|
| 109 |
|
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if (ret < 0)
|
| 110 |
|
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goto out;
|
| 111 |
|
|
|
| 112 |
|
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ret = -EPERM;
|
| 113 |
|
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if (current->euid != 0 && cmd != UMSDOS_GETVERSION)
|
| 114 |
|
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goto out;
|
| 115 |
|
|
|
| 116 |
|
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ret = -EINVAL;
|
| 117 |
|
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if (cmd == UMSDOS_GETVERSION) {
|
| 118 |
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/* #Specification: ioctl / UMSDOS_GETVERSION
|
| 119 |
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* The field version and release of the structure
|
| 120 |
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* umsdos_ioctl are filled with the version and release
|
| 121 |
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* number of the fs code in the kernel. This will allow
|
| 122 |
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* some form of checking. Users won't be able to run
|
| 123 |
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* incompatible utility such as the synchroniser (umssync).
|
| 124 |
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* umsdos_progs/umsdosio.c enforce this checking.
|
| 125 |
|
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*
|
| 126 |
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* Return always 0.
|
| 127 |
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*/
|
| 128 |
|
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put_user (UMSDOS_VERSION, &idata->version);
|
| 129 |
|
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put_user (UMSDOS_RELEASE, &idata->release);
|
| 130 |
|
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ret = 0;
|
| 131 |
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goto out;
|
| 132 |
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}
|
| 133 |
|
|
if (cmd == UMSDOS_READDIR_DOS) {
|
| 134 |
|
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/* #Specification: ioctl / UMSDOS_READDIR_DOS
|
| 135 |
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* One entry is read from the DOS directory at the current
|
| 136 |
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* file position. The entry is put as is in the dos_dirent
|
| 137 |
|
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* field of struct umsdos_ioctl.
|
| 138 |
|
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*
|
| 139 |
|
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* Return > 0 if success.
|
| 140 |
|
|
*/
|
| 141 |
|
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struct UMSDOS_DIR_ONCE bufk;
|
| 142 |
|
|
|
| 143 |
|
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bufk.count = 0;
|
| 144 |
|
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bufk.ent = &idata->dos_dirent;
|
| 145 |
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|
|
| 146 |
|
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fat_readdir (filp, &bufk, umsdos_ioctl_fill);
|
| 147 |
|
|
|
| 148 |
|
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ret = bufk.count == 1 ? 1 : 0;
|
| 149 |
|
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goto out;
|
| 150 |
|
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}
|
| 151 |
|
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if (cmd == UMSDOS_READDIR_EMD) {
|
| 152 |
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/* #Specification: ioctl / UMSDOS_READDIR_EMD
|
| 153 |
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* One entry is read from the EMD at the current
|
| 154 |
|
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* file position. The entry is put as is in the umsdos_dirent
|
| 155 |
|
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* field of struct umsdos_ioctl. The corresponding mangled
|
| 156 |
|
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* DOS entry name is put in the dos_dirent field.
|
| 157 |
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*
|
| 158 |
|
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* All entries are read including hidden links. Blank
|
| 159 |
|
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* entries are skipped.
|
| 160 |
|
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*
|
| 161 |
|
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* Return > 0 if success.
|
| 162 |
|
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*/
|
| 163 |
|
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struct dentry *demd;
|
| 164 |
|
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loff_t pos = filp->f_pos;
|
| 165 |
|
|
|
| 166 |
|
|
/* The absence of the EMD is simply seen as an EOF */
|
| 167 |
|
|
demd = umsdos_get_emd_dentry(dentry);
|
| 168 |
|
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ret = PTR_ERR(demd);
|
| 169 |
|
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if (IS_ERR(demd))
|
| 170 |
|
|
goto out;
|
| 171 |
|
|
ret = 0;
|
| 172 |
|
|
if (!demd->d_inode)
|
| 173 |
|
|
goto read_dput;
|
| 174 |
|
|
|
| 175 |
|
|
while (pos < demd->d_inode->i_size) {
|
| 176 |
|
|
off_t f_pos = pos;
|
| 177 |
|
|
struct umsdos_dirent entry;
|
| 178 |
|
|
struct umsdos_info info;
|
| 179 |
|
|
|
| 180 |
|
|
ret = umsdos_emd_dir_readentry (demd, &pos, &entry);
|
| 181 |
|
|
|
| 182 |
|
|
if (ret == -ENAMETOOLONG) {
|
| 183 |
|
|
printk (KERN_INFO "Fixing EMD entry with invalid size -- zeroing out\n");
|
| 184 |
|
|
memset (&info, 0, sizeof (info));
|
| 185 |
|
|
info.f_pos = f_pos;
|
| 186 |
|
|
info.recsize = UMSDOS_REC_SIZE;
|
| 187 |
|
|
ret = umsdos_writeentry (dentry, &info, 1);
|
| 188 |
|
|
continue;
|
| 189 |
|
|
}
|
| 190 |
|
|
|
| 191 |
|
|
if (ret)
|
| 192 |
|
|
break;
|
| 193 |
|
|
if (entry.name_len <= 0)
|
| 194 |
|
|
continue;
|
| 195 |
|
|
|
| 196 |
|
|
umsdos_parse (entry.name, entry.name_len, &info);
|
| 197 |
|
|
info.f_pos = f_pos;
|
| 198 |
|
|
umsdos_manglename (&info);
|
| 199 |
|
|
ret = -EFAULT;
|
| 200 |
|
|
if (copy_to_user (&idata->umsdos_dirent, &entry,
|
| 201 |
|
|
sizeof (entry)))
|
| 202 |
|
|
break;
|
| 203 |
|
|
if (copy_to_user (&idata->dos_dirent.d_name,
|
| 204 |
|
|
info.fake.fname,
|
| 205 |
|
|
info.fake.len + 1))
|
| 206 |
|
|
break;
|
| 207 |
|
|
ret = entry.name_len;
|
| 208 |
|
|
break;
|
| 209 |
|
|
}
|
| 210 |
|
|
/* update the original f_pos */
|
| 211 |
|
|
filp->f_pos = pos;
|
| 212 |
|
|
read_dput:
|
| 213 |
|
|
d_drop(demd);
|
| 214 |
|
|
dput(demd);
|
| 215 |
|
|
goto out;
|
| 216 |
|
|
}
|
| 217 |
|
|
if (cmd == UMSDOS_INIT_EMD) {
|
| 218 |
|
|
/* #Specification: ioctl / UMSDOS_INIT_EMD
|
| 219 |
|
|
* The UMSDOS_INIT_EMD command makes sure the EMD
|
| 220 |
|
|
* exists for a directory. If it does not, it is
|
| 221 |
|
|
* created. Also, it makes sure the directory function
|
| 222 |
|
|
* table (struct inode_operations) is set to the UMSDOS
|
| 223 |
|
|
* semantic. This mean that umssync may be applied to
|
| 224 |
|
|
* an "opened" msdos directory, and it will change behavior
|
| 225 |
|
|
* on the fly.
|
| 226 |
|
|
*
|
| 227 |
|
|
* Return 0 if success.
|
| 228 |
|
|
*/
|
| 229 |
|
|
|
| 230 |
|
|
ret = umsdos_make_emd(dentry);
|
| 231 |
|
|
Printk(("UMSDOS_ioctl_dir: INIT_EMD %s/%s, ret=%d\n",
|
| 232 |
|
|
dentry->d_parent->d_name.name, dentry->d_name.name, ret));
|
| 233 |
|
|
umsdos_setup_dir (dentry);
|
| 234 |
|
|
goto out;
|
| 235 |
|
|
}
|
| 236 |
|
|
|
| 237 |
|
|
ret = -EFAULT;
|
| 238 |
|
|
if (copy_from_user (&data, idata, sizeof (data)))
|
| 239 |
|
|
goto out;
|
| 240 |
|
|
|
| 241 |
|
|
if (cmd == UMSDOS_CREAT_EMD) {
|
| 242 |
|
|
/* #Specification: ioctl / UMSDOS_CREAT_EMD
|
| 243 |
|
|
* The umsdos_dirent field of the struct umsdos_ioctl is used
|
| 244 |
|
|
* as is to create a new entry in the EMD of the directory.
|
| 245 |
|
|
* The DOS directory is not modified.
|
| 246 |
|
|
* No validation is done (yet).
|
| 247 |
|
|
*
|
| 248 |
|
|
* Return 0 if success.
|
| 249 |
|
|
*/
|
| 250 |
|
|
struct umsdos_info info;
|
| 251 |
|
|
|
| 252 |
|
|
/* This makes sure info.entry and info in general
|
| 253 |
|
|
* is correctly initialised
|
| 254 |
|
|
*/
|
| 255 |
|
|
memcpy (&info.entry, &data.umsdos_dirent,
|
| 256 |
|
|
sizeof (data.umsdos_dirent));
|
| 257 |
|
|
umsdos_parse (data.umsdos_dirent.name
|
| 258 |
|
|
,data.umsdos_dirent.name_len, &info);
|
| 259 |
|
|
ret = umsdos_newentry (dentry, &info);
|
| 260 |
|
|
goto out;
|
| 261 |
|
|
}
|
| 262 |
|
|
else if (cmd == UMSDOS_RENAME_DOS) {
|
| 263 |
|
|
struct dentry *old_dentry, *new_dentry; /* FIXME */
|
| 264 |
|
|
|
| 265 |
|
|
/* #Specification: ioctl / UMSDOS_RENAME_DOS
|
| 266 |
|
|
* A file or directory is renamed in a DOS directory
|
| 267 |
|
|
* (not moved across directory). The source name
|
| 268 |
|
|
* is in the dos_dirent.name field and the destination
|
| 269 |
|
|
* is in umsdos_dirent.name field.
|
| 270 |
|
|
*
|
| 271 |
|
|
* This ioctl allows umssync to rename a mangled file
|
| 272 |
|
|
* name before syncing it back in the EMD.
|
| 273 |
|
|
*/
|
| 274 |
|
|
old_dentry = umsdos_lookup_dentry (dentry,
|
| 275 |
|
|
data.dos_dirent.d_name,
|
| 276 |
|
|
data.dos_dirent.d_reclen ,1);
|
| 277 |
|
|
ret = PTR_ERR(old_dentry);
|
| 278 |
|
|
if (IS_ERR(old_dentry))
|
| 279 |
|
|
goto out;
|
| 280 |
|
|
new_dentry = umsdos_lookup_dentry (dentry,
|
| 281 |
|
|
data.umsdos_dirent.name,
|
| 282 |
|
|
data.umsdos_dirent.name_len, 1);
|
| 283 |
|
|
ret = PTR_ERR(new_dentry);
|
| 284 |
|
|
if (!IS_ERR(new_dentry)) {
|
| 285 |
|
|
printk("umsdos_ioctl: renaming %s/%s to %s/%s\n",
|
| 286 |
|
|
old_dentry->d_parent->d_name.name, old_dentry->d_name.name,
|
| 287 |
|
|
new_dentry->d_parent->d_name.name, new_dentry->d_name.name);
|
| 288 |
|
|
ret = msdos_rename (dir, old_dentry, dir, new_dentry);
|
| 289 |
|
|
d_drop(new_dentry);
|
| 290 |
|
|
d_drop(old_dentry);
|
| 291 |
|
|
dput(new_dentry);
|
| 292 |
|
|
}
|
| 293 |
|
|
dput(old_dentry);
|
| 294 |
|
|
goto out;
|
| 295 |
|
|
}
|
| 296 |
|
|
else if (cmd == UMSDOS_UNLINK_EMD) {
|
| 297 |
|
|
/* #Specification: ioctl / UMSDOS_UNLINK_EMD
|
| 298 |
|
|
* The umsdos_dirent field of the struct umsdos_ioctl is used
|
| 299 |
|
|
* as is to remove an entry from the EMD of the directory.
|
| 300 |
|
|
* No validation is done (yet). The mode field is used
|
| 301 |
|
|
* to validate S_ISDIR or S_ISREG.
|
| 302 |
|
|
*
|
| 303 |
|
|
* Return 0 if success.
|
| 304 |
|
|
*/
|
| 305 |
|
|
struct umsdos_info info;
|
| 306 |
|
|
|
| 307 |
|
|
/* This makes sure info.entry and info in general
|
| 308 |
|
|
* is correctly initialised
|
| 309 |
|
|
*/
|
| 310 |
|
|
memcpy (&info.entry, &data.umsdos_dirent,
|
| 311 |
|
|
sizeof (data.umsdos_dirent));
|
| 312 |
|
|
umsdos_parse (data.umsdos_dirent.name,
|
| 313 |
|
|
data.umsdos_dirent.name_len, &info);
|
| 314 |
|
|
ret = umsdos_delentry (dentry, &info,
|
| 315 |
|
|
S_ISDIR (data.umsdos_dirent.mode));
|
| 316 |
|
|
if (ret) {
|
| 317 |
|
|
printk(KERN_WARNING
|
| 318 |
|
|
"umsdos_ioctl: delentry %s/%s failed, ret=%d\n",
|
| 319 |
|
|
dentry->d_name.name, info.entry.name, ret);
|
| 320 |
|
|
}
|
| 321 |
|
|
goto out;
|
| 322 |
|
|
}
|
| 323 |
|
|
else if (cmd == UMSDOS_UNLINK_DOS) {
|
| 324 |
|
|
struct dentry *temp;
|
| 325 |
|
|
|
| 326 |
|
|
/* #Specification: ioctl / UMSDOS_UNLINK_DOS
|
| 327 |
|
|
* The dos_dirent field of the struct umsdos_ioctl is used to
|
| 328 |
|
|
* execute a msdos_unlink operation. The d_name and d_reclen
|
| 329 |
|
|
* fields are used.
|
| 330 |
|
|
*
|
| 331 |
|
|
* Return 0 if success.
|
| 332 |
|
|
*/
|
| 333 |
|
|
temp = umsdos_lookup_dentry(dentry, data.dos_dirent.d_name,
|
| 334 |
|
|
data.dos_dirent.d_reclen, 1);
|
| 335 |
|
|
ret = PTR_ERR(temp);
|
| 336 |
|
|
if (IS_ERR(temp))
|
| 337 |
|
|
goto out;
|
| 338 |
|
|
ret = -ENOENT;
|
| 339 |
|
|
if (temp->d_inode) {
|
| 340 |
|
|
ret = -EISDIR;
|
| 341 |
|
|
if (!S_ISDIR(temp->d_inode->i_mode))
|
| 342 |
|
|
ret = msdos_unlink (dir, temp);
|
| 343 |
|
|
if (!ret)
|
| 344 |
|
|
d_delete(temp);
|
| 345 |
|
|
}
|
| 346 |
|
|
dput (temp);
|
| 347 |
|
|
goto out;
|
| 348 |
|
|
}
|
| 349 |
|
|
else if (cmd == UMSDOS_RMDIR_DOS) {
|
| 350 |
|
|
struct dentry *temp;
|
| 351 |
|
|
|
| 352 |
|
|
/* #Specification: ioctl / UMSDOS_RMDIR_DOS
|
| 353 |
|
|
* The dos_dirent field of the struct umsdos_ioctl is used to
|
| 354 |
|
|
* execute a msdos_rmdir operation. The d_name and d_reclen
|
| 355 |
|
|
* fields are used.
|
| 356 |
|
|
*
|
| 357 |
|
|
* Return 0 if success.
|
| 358 |
|
|
*/
|
| 359 |
|
|
temp = umsdos_lookup_dentry(dentry, data.dos_dirent.d_name,
|
| 360 |
|
|
data.dos_dirent.d_reclen, 1);
|
| 361 |
|
|
ret = PTR_ERR(temp);
|
| 362 |
|
|
if (IS_ERR(temp))
|
| 363 |
|
|
goto out;
|
| 364 |
|
|
ret = -ENOENT;
|
| 365 |
|
|
if (temp->d_inode) {
|
| 366 |
|
|
ret = -ENOTDIR;
|
| 367 |
|
|
if (S_ISDIR(temp->d_inode->i_mode))
|
| 368 |
|
|
ret = msdos_rmdir (dir, temp);
|
| 369 |
|
|
if (!ret)
|
| 370 |
|
|
d_delete(temp);
|
| 371 |
|
|
}
|
| 372 |
|
|
dput (temp);
|
| 373 |
|
|
goto out;
|
| 374 |
|
|
|
| 375 |
|
|
} else if (cmd == UMSDOS_STAT_DOS) {
|
| 376 |
|
|
/* #Specification: ioctl / UMSDOS_STAT_DOS
|
| 377 |
|
|
* The dos_dirent field of the struct umsdos_ioctl is
|
| 378 |
|
|
* used to execute a stat operation in the DOS directory.
|
| 379 |
|
|
* The d_name and d_reclen fields are used.
|
| 380 |
|
|
*
|
| 381 |
|
|
* The following field of umsdos_ioctl.stat are filled.
|
| 382 |
|
|
*
|
| 383 |
|
|
* st_ino,st_mode,st_size,st_atime,st_mtime,st_ctime,
|
| 384 |
|
|
* Return 0 if success.
|
| 385 |
|
|
*/
|
| 386 |
|
|
struct dentry *dret;
|
| 387 |
|
|
struct inode *inode;
|
| 388 |
|
|
|
| 389 |
|
|
dret = umsdos_lookup_dentry(dentry, data.dos_dirent.d_name,
|
| 390 |
|
|
data.dos_dirent.d_reclen, 1);
|
| 391 |
|
|
ret = PTR_ERR(dret);
|
| 392 |
|
|
if (IS_ERR(dret))
|
| 393 |
|
|
goto out;
|
| 394 |
|
|
ret = -ENOENT;
|
| 395 |
|
|
inode = dret->d_inode;
|
| 396 |
|
|
if (inode) {
|
| 397 |
|
|
data.stat.st_ino = inode->i_ino;
|
| 398 |
|
|
data.stat.st_mode = inode->i_mode;
|
| 399 |
|
|
data.stat.st_size = inode->i_size;
|
| 400 |
|
|
data.stat.st_atime = inode->i_atime;
|
| 401 |
|
|
data.stat.st_ctime = inode->i_ctime;
|
| 402 |
|
|
data.stat.st_mtime = inode->i_mtime;
|
| 403 |
|
|
ret = -EFAULT;
|
| 404 |
|
|
if (!copy_to_user (&idata->stat, &data.stat,
|
| 405 |
|
|
sizeof (data.stat)))
|
| 406 |
|
|
ret = 0;
|
| 407 |
|
|
}
|
| 408 |
|
|
dput(dret);
|
| 409 |
|
|
goto out;
|
| 410 |
|
|
}
|
| 411 |
|
|
else if (cmd == UMSDOS_DOS_SETUP) {
|
| 412 |
|
|
/* #Specification: ioctl / UMSDOS_DOS_SETUP
|
| 413 |
|
|
* The UMSDOS_DOS_SETUP ioctl allow changing the
|
| 414 |
|
|
* default permission of the MS-DOS filesystem driver
|
| 415 |
|
|
* on the fly. The MS-DOS driver applies global permissions
|
| 416 |
|
|
* to every file and directory. Normally these permissions
|
| 417 |
|
|
* are controlled by a mount option. This is not
|
| 418 |
|
|
* available for root partition, so a special utility
|
| 419 |
|
|
* (umssetup) is provided to do this, normally in
|
| 420 |
|
|
* /etc/rc.local.
|
| 421 |
|
|
*
|
| 422 |
|
|
* Be aware that this applies ONLY to MS-DOS directories
|
| 423 |
|
|
* (those without EMD --linux-.---). Umsdos directory
|
| 424 |
|
|
* have independent (standard) permission for each
|
| 425 |
|
|
* and every file.
|
| 426 |
|
|
*
|
| 427 |
|
|
* The field umsdos_dirent provide the information needed.
|
| 428 |
|
|
* umsdos_dirent.uid and gid sets the owner and group.
|
| 429 |
|
|
* umsdos_dirent.mode set the permissions flags.
|
| 430 |
|
|
*/
|
| 431 |
|
|
dir->i_sb->u.msdos_sb.options.fs_uid = data.umsdos_dirent.uid;
|
| 432 |
|
|
dir->i_sb->u.msdos_sb.options.fs_gid = data.umsdos_dirent.gid;
|
| 433 |
|
|
dir->i_sb->u.msdos_sb.options.fs_umask = data.umsdos_dirent.mode;
|
| 434 |
|
|
ret = 0;
|
| 435 |
|
|
}
|
| 436 |
|
|
out:
|
| 437 |
|
|
Printk (("ioctl %d, returning %d\n", cmd, ret));
|
| 438 |
|
|
return ret;
|
| 439 |
|
|
}
|
