Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 225 insertions, 0 deletions

diff --git a/fs/fat/misc.c b/fs/fat/misc.c
new file mode 100644
index 000000000000..2a0df2122f5d
--- /dev/null
+++ b/fs/fat/misc.c
@@ -0,0 +1,225 @@
+/*
+ *  linux/fs/fat/misc.c
+ *
+ *  Written 1992,1993 by Werner Almesberger
+ *  22/11/2000 - Fixed fat_date_unix2dos for dates earlier than 01/01/1980
+ *               and date_dos2unix for date==0 by Igor Zhbanov(bsg@uniyar.ac.ru)
+ */
+
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/msdos_fs.h>
+#include <linux/buffer_head.h>
+
+/*
+ * fat_fs_panic reports a severe file system problem and sets the file system
+ * read-only. The file system can be made writable again by remounting it.
+ */
+void fat_fs_panic(struct super_block *s, const char *fmt, ...)
+{
+        va_list args;
+
+        printk(KERN_ERR "FAT: Filesystem panic (dev %s)\n", s->s_id);
+
+        printk(KERN_ERR "    ");
+        va_start(args, fmt);
+        vprintk(fmt, args);
+        va_end(args);
+        printk("\n");
+
+        if (!(s->s_flags & MS_RDONLY)) {
+                s->s_flags |= MS_RDONLY;
+                printk(KERN_ERR "    File system has been set read-only\n");
+        }
+}
+
+EXPORT_SYMBOL(fat_fs_panic);
+
+/* Flushes the number of free clusters on FAT32 */
+/* XXX: Need to write one per FSINFO block.  Currently only writes 1 */
+void fat_clusters_flush(struct super_block *sb)
+{
+        struct msdos_sb_info *sbi = MSDOS_SB(sb);
+        struct buffer_head *bh;
+        struct fat_boot_fsinfo *fsinfo;
+
+        if (sbi->fat_bits != 32)
+                return;
+
+        bh = sb_bread(sb, sbi->fsinfo_sector);
+        if (bh == NULL) {
+                printk(KERN_ERR "FAT: bread failed in fat_clusters_flush\n");
+                return;
+        }
+
+        fsinfo = (struct fat_boot_fsinfo *)bh->b_data;
+        /* Sanity check */
+        if (!IS_FSINFO(fsinfo)) {
+                printk(KERN_ERR "FAT: Did not find valid FSINFO signature.\n"
+                       "     Found signature1 0x%08x signature2 0x%08x"
+                       " (sector = %lu)\n",
+                       le32_to_cpu(fsinfo->signature1),
+                       le32_to_cpu(fsinfo->signature2),
+                       sbi->fsinfo_sector);
+        } else {
+                if (sbi->free_clusters != -1)
+                        fsinfo->free_clusters = cpu_to_le32(sbi->free_clusters);
+                if (sbi->prev_free != -1)
+                        fsinfo->next_cluster = cpu_to_le32(sbi->prev_free);
+                mark_buffer_dirty(bh);
+                if (sb->s_flags & MS_SYNCHRONOUS)
+                        sync_dirty_buffer(bh);
+        }
+        brelse(bh);
+}
+
+/*
+ * fat_chain_add() adds a new cluster to the chain of clusters represented
+ * by inode.
+ */
+int fat_chain_add(struct inode *inode, int new_dclus, int nr_cluster)
+{
+        struct super_block *sb = inode->i_sb;
+        struct msdos_sb_info *sbi = MSDOS_SB(sb);
+        int ret, new_fclus, last;
+
+        /*
+         * We must locate the last cluster of the file to add this new
+         * one (new_dclus) to the end of the link list (the FAT).
+         */
+        last = new_fclus = 0;
+        if (MSDOS_I(inode)->i_start) {
+                int fclus, dclus;
+
+                ret = fat_get_cluster(inode, FAT_ENT_EOF, &fclus, &dclus);
+                if (ret < 0)
+                        return ret;
+                new_fclus = fclus + 1;
+                last = dclus;
+        }
+
+        /* add new one to the last of the cluster chain */
+        if (last) {
+                struct fat_entry fatent;
+
+                fatent_init(&fatent);
+                ret = fat_ent_read(inode, &fatent, last);
+                if (ret >= 0) {
+                        int wait = inode_needs_sync(inode);
+                        ret = fat_ent_write(inode, &fatent, new_dclus, wait);
+                        fatent_brelse(&fatent);
+                }
+                if (ret < 0)
+                        return ret;
+//              fat_cache_add(inode, new_fclus, new_dclus);
+        } else {
+                MSDOS_I(inode)->i_start = new_dclus;
+                MSDOS_I(inode)->i_logstart = new_dclus;
+                /*
+                 * Since generic_osync_inode() synchronize later if
+                 * this is not directory, we don't here.
+                 */
+                if (S_ISDIR(inode->i_mode) && IS_DIRSYNC(inode)) {
+                        ret = fat_sync_inode(inode);
+                        if (ret)
+                                return ret;
+                } else
+                        mark_inode_dirty(inode);
+        }
+        if (new_fclus != (inode->i_blocks >> (sbi->cluster_bits - 9))) {
+                fat_fs_panic(sb, "clusters badly computed (%d != %lu)",
+                        new_fclus, inode->i_blocks >> (sbi->cluster_bits - 9));
+                fat_cache_inval_inode(inode);
+        }
+        inode->i_blocks += nr_cluster << (sbi->cluster_bits - 9);
+
+        return 0;
+}
+
+extern struct timezone sys_tz;
+
+/* Linear day numbers of the respective 1sts in non-leap years. */
+static int day_n[] = {
+   /* Jan  Feb  Mar  Apr   May  Jun  Jul  Aug  Sep  Oct  Nov  Dec */
+        0,  31,  59,  90,  120, 151, 181, 212, 243, 273, 304, 334, 0, 0, 0, 0
+};
+
+/* Convert a MS-DOS time/date pair to a UNIX date (seconds since 1 1 70). */
+int date_dos2unix(unsigned short time, unsigned short date)
+{
+        int month, year, secs;
+
+        /*
+         * first subtract and mask after that... Otherwise, if
+         * date == 0, bad things happen
+         */
+        month = ((date >> 5) - 1) & 15;
+        year = date >> 9;
+        secs = (time & 31)*2+60*((time >> 5) & 63)+(time >> 11)*3600+86400*
+            ((date & 31)-1+day_n[month]+(year/4)+year*365-((year & 3) == 0 &&
+            month < 2 ? 1 : 0)+3653);
+                        /* days since 1.1.70 plus 80's leap day */
+        secs += sys_tz.tz_minuteswest*60;
+        return secs;
+}
+
+/* Convert linear UNIX date to a MS-DOS time/date pair. */
+void fat_date_unix2dos(int unix_date, __le16 *time, __le16 *date)
+{
+        int day, year, nl_day, month;
+
+        unix_date -= sys_tz.tz_minuteswest*60;
+
+        /* Jan 1 GMT 00:00:00 1980. But what about another time zone? */
+        if (unix_date < 315532800)
+                unix_date = 315532800;
+
+        *time = cpu_to_le16((unix_date % 60)/2+(((unix_date/60) % 60) << 5)+
+            (((unix_date/3600) % 24) << 11));
+        day = unix_date/86400-3652;
+        year = day/365;
+        if ((year+3)/4+365*year > day)
+                year--;
+        day -= (year+3)/4+365*year;
+        if (day == 59 && !(year & 3)) {
+                nl_day = day;
+                month = 2;
+        } else {
+                nl_day = (year & 3) || day <= 59 ? day : day-1;
+                for (month = 0; month < 12; month++) {
+                        if (day_n[month] > nl_day)
+                                break;
+                }
+        }
+        *date = cpu_to_le16(nl_day-day_n[month-1]+1+(month << 5)+(year << 9));
+}
+
+EXPORT_SYMBOL(fat_date_unix2dos);
+
+int fat_sync_bhs(struct buffer_head **bhs, int nr_bhs)
+{
+        int i, e, err = 0;
+
+        for (i = 0; i < nr_bhs; i++) {
+                lock_buffer(bhs[i]);
+                if (test_clear_buffer_dirty(bhs[i])) {
+                        get_bh(bhs[i]);
+                        bhs[i]->b_end_io = end_buffer_write_sync;
+                        e = submit_bh(WRITE, bhs[i]);
+                        if (!err && e)
+                                err = e;
+                } else
+                        unlock_buffer(bhs[i]);
+        }
+        for (i = 0; i < nr_bhs; i++) {
+                wait_on_buffer(bhs[i]);
+                if (buffer_eopnotsupp(bhs[i])) {
+                        clear_buffer_eopnotsupp(bhs[i]);
+                        err = -EOPNOTSUPP;
+                } else if (!err && !buffer_uptodate(bhs[i]))
+                        err = -EIO;
+        }
+        return err;
+}
+
+EXPORT_SYMBOL(fat_sync_bhs);