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, 280 insertions, 0 deletions

diff --git a/fs/isofs/dir.c b/fs/isofs/dir.c
new file mode 100644
index 000000000000..14d86de6637d
--- /dev/null
+++ b/fs/isofs/dir.c
@@ -0,0 +1,280 @@
+/*
+ *  linux/fs/isofs/dir.c
+ *
+ *  (C) 1992, 1993, 1994  Eric Youngdale Modified for ISO 9660 filesystem.
+ *
+ *  (C) 1991  Linus Torvalds - minix filesystem
+ *
+ *  Steve Beynon                       : Missing last directory entries fixed
+ *  (stephen@askone.demon.co.uk)      : 21st June 1996
+ * 
+ *  isofs directory handling functions
+ */
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/iso_fs.h>
+#include <linux/kernel.h>
+#include <linux/stat.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/time.h>
+#include <linux/config.h>
+#include <linux/smp_lock.h>
+#include <linux/buffer_head.h>
+
+#include <asm/uaccess.h>
+
+static int isofs_readdir(struct file *, void *, filldir_t);
+
+struct file_operations isofs_dir_operations =
+{
+        .read           = generic_read_dir,
+        .readdir        = isofs_readdir,
+};
+
+/*
+ * directories can handle most operations...
+ */
+struct inode_operations isofs_dir_inode_operations =
+{
+        .lookup         = isofs_lookup,
+};
+
+int isofs_name_translate(struct iso_directory_record *de, char *new, struct inode *inode)
+{
+        char * old = de->name;
+        int len = de->name_len[0];
+        int i;
+                        
+        for (i = 0; i < len; i++) {
+                unsigned char c = old[i];
+                if (!c)
+                        break;
+
+                if (c >= 'A' && c <= 'Z')
+                        c |= 0x20;      /* lower case */
+
+                /* Drop trailing '.;1' (ISO 9660:1988 7.5.1 requires period) */
+                if (c == '.' && i == len - 3 && old[i + 1] == ';' && old[i + 2] == '1')
+                        break;
+
+                /* Drop trailing ';1' */
+                if (c == ';' && i == len - 2 && old[i + 1] == '1')
+                        break;
+
+                /* Convert remaining ';' to '.' */
+                /* Also '/' to '.' (broken Acorn-generated ISO9660 images) */
+                if (c == ';' || c == '/')
+                        c = '.';
+
+                new[i] = c;
+        }
+        return i;
+}
+
+/* Acorn extensions written by Matthew Wilcox <willy@bofh.ai> 1998 */
+int get_acorn_filename(struct iso_directory_record * de,
+                            char * retname, struct inode * inode)
+{
+        int std;
+        unsigned char * chr;
+        int retnamlen = isofs_name_translate(de, retname, inode);
+        if (retnamlen == 0) return 0;
+        std = sizeof(struct iso_directory_record) + de->name_len[0];
+        if (std & 1) std++;
+        if ((*((unsigned char *) de) - std) != 32) return retnamlen;
+        chr = ((unsigned char *) de) + std;
+        if (strncmp(chr, "ARCHIMEDES", 10)) return retnamlen;
+        if ((*retname == '_') && ((chr[19] & 1) == 1)) *retname = '!';
+        if (((de->flags[0] & 2) == 0) && (chr[13] == 0xff)
+                && ((chr[12] & 0xf0) == 0xf0))
+        {
+                retname[retnamlen] = ',';
+                sprintf(retname+retnamlen+1, "%3.3x",
+                        ((chr[12] & 0xf) << 8) | chr[11]);
+                retnamlen += 4;
+        }
+        return retnamlen;
+}
+
+/*
+ * This should _really_ be cleaned up some day..
+ */
+static int do_isofs_readdir(struct inode *inode, struct file *filp,
+                void *dirent, filldir_t filldir,
+                char * tmpname, struct iso_directory_record * tmpde)
+{
+        unsigned long bufsize = ISOFS_BUFFER_SIZE(inode);
+        unsigned char bufbits = ISOFS_BUFFER_BITS(inode);
+        unsigned long block, offset, block_saved, offset_saved;
+        unsigned long inode_number = 0; /* Quiet GCC */
+        struct buffer_head *bh = NULL;
+        int len;
+        int map;
+        int first_de = 1;
+        char *p = NULL;         /* Quiet GCC */
+        struct iso_directory_record *de;
+        struct isofs_sb_info *sbi = ISOFS_SB(inode->i_sb);
+
+        offset = filp->f_pos & (bufsize - 1);
+        block = filp->f_pos >> bufbits;
+
+        while (filp->f_pos < inode->i_size) {
+                int de_len;
+
+                if (!bh) {
+                        bh = isofs_bread(inode, block);
+                        if (!bh)
+                                return 0;
+                }
+
+                de = (struct iso_directory_record *) (bh->b_data + offset);
+
+                de_len = *(unsigned char *) de;
+
+                /* If the length byte is zero, we should move on to the next
+                   CDROM sector.  If we are at the end of the directory, we
+                   kick out of the while loop. */
+
+                if (de_len == 0) {
+                        brelse(bh);
+                        bh = NULL;
+                        filp->f_pos = (filp->f_pos + ISOFS_BLOCK_SIZE) & ~(ISOFS_BLOCK_SIZE - 1);
+                        block = filp->f_pos >> bufbits;
+                        offset = 0;
+                        continue;
+                }
+
+                block_saved = block;
+                offset_saved = offset;
+                offset += de_len;
+
+                /* Make sure we have a full directory entry */
+                if (offset >= bufsize) {
+                        int slop = bufsize - offset + de_len;
+                        memcpy(tmpde, de, slop);
+                        offset &= bufsize - 1;
+                        block++;
+                        brelse(bh);
+                        bh = NULL;
+                        if (offset) {
+                                bh = isofs_bread(inode, block);
+                                if (!bh)
+                                        return 0;
+                                memcpy((void *) tmpde + slop, bh->b_data, offset);
+                        }
+                        de = tmpde;
+                }
+
+                if (first_de) {
+                        isofs_normalize_block_and_offset(de,
+                                                         &block_saved,
+                                                         &offset_saved);
+                        inode_number = isofs_get_ino(block_saved,
+                                                     offset_saved,
+                                                     bufbits);
+                }
+
+                if (de->flags[-sbi->s_high_sierra] & 0x80) {
+                        first_de = 0;
+                        filp->f_pos += de_len;
+                        continue;
+                }
+                first_de = 1;
+
+                /* Handle the case of the '.' directory */
+                if (de->name_len[0] == 1 && de->name[0] == 0) {
+                        if (filldir(dirent, ".", 1, filp->f_pos, inode->i_ino, DT_DIR) < 0)
+                                break;
+                        filp->f_pos += de_len;
+                        continue;
+                }
+
+                len = 0;
+
+                /* Handle the case of the '..' directory */
+                if (de->name_len[0] == 1 && de->name[0] == 1) {
+                        inode_number = parent_ino(filp->f_dentry);
+                        if (filldir(dirent, "..", 2, filp->f_pos, inode_number, DT_DIR) < 0)
+                                break;
+                        filp->f_pos += de_len;
+                        continue;
+                }
+
+                /* Handle everything else.  Do name translation if there
+                   is no Rock Ridge NM field. */
+                if (sbi->s_unhide == 'n') {
+                        /* Do not report hidden or associated files */
+                        if (de->flags[-sbi->s_high_sierra] & 5) {
+                                filp->f_pos += de_len;
+                                continue;
+                        }
+                }
+
+                map = 1;
+                if (sbi->s_rock) {
+                        len = get_rock_ridge_filename(de, tmpname, inode);
+                        if (len != 0) {         /* may be -1 */
+                                p = tmpname;
+                                map = 0;
+                        }
+                }
+                if (map) {
+#ifdef CONFIG_JOLIET
+                        if (sbi->s_joliet_level) {
+                                len = get_joliet_filename(de, tmpname, inode);
+                                p = tmpname;
+                        } else
+#endif
+                        if (sbi->s_mapping == 'a') {
+                                len = get_acorn_filename(de, tmpname, inode);
+                                p = tmpname;
+                        } else
+                        if (sbi->s_mapping == 'n') {
+                                len = isofs_name_translate(de, tmpname, inode);
+                                p = tmpname;
+                        } else {
+                                p = de->name;
+                                len = de->name_len[0];
+                        }
+                }
+                if (len > 0) {
+                        if (filldir(dirent, p, len, filp->f_pos, inode_number, DT_UNKNOWN) < 0)
+                                break;
+                }
+                filp->f_pos += de_len;
+
+                continue;
+        }
+        if (bh) brelse(bh);
+        return 0;
+}
+
+/*
+ * Handle allocation of temporary space for name translation and
+ * handling split directory entries.. The real work is done by
+ * "do_isofs_readdir()".
+ */
+static int isofs_readdir(struct file *filp,
+                void *dirent, filldir_t filldir)
+{
+        int result;
+        char * tmpname;
+        struct iso_directory_record * tmpde;
+        struct inode *inode = filp->f_dentry->d_inode;
+
+
+        tmpname = (char *)__get_free_page(GFP_KERNEL);
+        if (tmpname == NULL)
+                return -ENOMEM;
+
+        lock_kernel();
+        tmpde = (struct iso_directory_record *) (tmpname+1024);
+
+        result = do_isofs_readdir(inode, filp, dirent, filldir, tmpname, tmpde);
+
+        free_page((unsigned long) tmpname);
+        unlock_kernel();
+        return result;
+}