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, 268 insertions, 0 deletions

diff --git a/fs/udf/dir.c b/fs/udf/dir.c
new file mode 100644
index 000000000000..82440b731142
--- /dev/null
+++ b/fs/udf/dir.c
@@ -0,0 +1,268 @@
+/*
+ * dir.c
+ *
+ * PURPOSE
+ *  Directory handling routines for the OSTA-UDF(tm) filesystem.
+ *
+ * CONTACTS
+ *      E-mail regarding any portion of the Linux UDF file system should be
+ *      directed to the development team mailing list (run by majordomo):
+ *              linux_udf@hpesjro.fc.hp.com
+ *
+ * COPYRIGHT
+ *      This file is distributed under the terms of the GNU General Public
+ *      License (GPL). Copies of the GPL can be obtained from:
+ *              ftp://prep.ai.mit.edu/pub/gnu/GPL
+ *      Each contributing author retains all rights to their own work.
+ *
+ *  (C) 1998-2004 Ben Fennema
+ *
+ * HISTORY
+ *
+ *  10/05/98 dgb  Split directory operations into its own file
+ *                Implemented directory reads via do_udf_readdir
+ *  10/06/98      Made directory operations work!
+ *  11/17/98      Rewrote directory to support ICBTAG_FLAG_AD_LONG
+ *  11/25/98 blf  Rewrote directory handling (readdir+lookup) to support reading
+ *                across blocks.
+ *  12/12/98      Split out the lookup code to namei.c. bulk of directory
+ *                code now in directory.c:udf_fileident_read.
+ */
+
+#include "udfdecl.h"
+
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/smp_lock.h>
+#include <linux/buffer_head.h>
+
+#include "udf_i.h"
+#include "udf_sb.h"
+
+/* Prototypes for file operations */
+static int udf_readdir(struct file *, void *, filldir_t);
+static int do_udf_readdir(struct inode *, struct file *, filldir_t, void *);
+
+/* readdir and lookup functions */
+
+struct file_operations udf_dir_operations = {
+        .read                   = generic_read_dir,
+        .readdir                = udf_readdir,
+        .ioctl                  = udf_ioctl,
+        .fsync                  = udf_fsync_file,
+};
+
+/*
+ * udf_readdir
+ *
+ * PURPOSE
+ *      Read a directory entry.
+ *
+ * DESCRIPTION
+ *      Optional - sys_getdents() will return -ENOTDIR if this routine is not
+ *      available.
+ *
+ *      Refer to sys_getdents() in fs/readdir.c
+ *      sys_getdents() -> .
+ *
+ * PRE-CONDITIONS
+ *      filp                    Pointer to directory file.
+ *      buf                     Pointer to directory entry buffer.
+ *      filldir                 Pointer to filldir function.
+ *
+ * POST-CONDITIONS
+ *      <return>                >=0 on success.
+ *
+ * HISTORY
+ *      July 1, 1997 - Andrew E. Mileski
+ *      Written, tested, and released.
+ */
+
+int udf_readdir(struct file *filp, void *dirent, filldir_t filldir)
+{
+        struct inode *dir = filp->f_dentry->d_inode;
+        int result;
+
+        lock_kernel();
+
+        if ( filp->f_pos == 0 ) 
+        {
+                if (filldir(dirent, ".", 1, filp->f_pos, dir->i_ino, DT_DIR) < 0)
+                {
+                        unlock_kernel();
+                        return 0;
+                }
+                filp->f_pos ++;
+        }
+
+        result = do_udf_readdir(dir, filp, filldir, dirent);
+        unlock_kernel();
+        return result;
+}
+
+static int 
+do_udf_readdir(struct inode * dir, struct file *filp, filldir_t filldir, void *dirent)
+{
+        struct udf_fileident_bh fibh;
+        struct fileIdentDesc *fi=NULL;
+        struct fileIdentDesc cfi;
+        int block, iblock;
+        loff_t nf_pos = filp->f_pos - 1;
+        int flen;
+        char fname[UDF_NAME_LEN];
+        char *nameptr;
+        uint16_t liu;
+        uint8_t lfi;
+        loff_t size = (udf_ext0_offset(dir) + dir->i_size) >> 2;
+        struct buffer_head * bh = NULL, * tmp, * bha[16];
+        kernel_lb_addr bloc, eloc;
+        uint32_t extoffset, elen, offset;
+        int i, num;
+        unsigned int dt_type;
+
+        if (nf_pos >= size)
+                return 0;
+
+        if (nf_pos == 0)
+                nf_pos = (udf_ext0_offset(dir) >> 2);
+
+        fibh.soffset = fibh.eoffset = (nf_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2;
+        if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
+                fibh.sbh = fibh.ebh = NULL;
+        else if (inode_bmap(dir, nf_pos >> (dir->i_sb->s_blocksize_bits - 2),
+                &bloc, &extoffset, &eloc, &elen, &offset, &bh) == (EXT_RECORDED_ALLOCATED >> 30))
+        {
+                offset >>= dir->i_sb->s_blocksize_bits;
+                block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
+                if ((++offset << dir->i_sb->s_blocksize_bits) < elen)
+                {
+                        if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT)
+                                extoffset -= sizeof(short_ad);
+                        else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG)
+                                extoffset -= sizeof(long_ad);
+                }
+                else
+                        offset = 0;
+
+                if (!(fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block)))
+                {
+                        udf_release_data(bh);
+                        return -EIO;
+                }
+        
+                if (!(offset & ((16 >> (dir->i_sb->s_blocksize_bits - 9))-1)))
+                {
+                        i = 16 >> (dir->i_sb->s_blocksize_bits - 9);
+                        if (i+offset > (elen >> dir->i_sb->s_blocksize_bits))
+                                i = (elen >> dir->i_sb->s_blocksize_bits)-offset;
+                        for (num=0; i>0; i--)
+                        {
+                                block = udf_get_lb_pblock(dir->i_sb, eloc, offset+i);
+                                tmp = udf_tgetblk(dir->i_sb, block);
+                                if (tmp && !buffer_uptodate(tmp) && !buffer_locked(tmp))
+                                        bha[num++] = tmp;
+                                else
+                                        brelse(tmp);
+                        }
+                        if (num)
+                        {
+                                ll_rw_block(READA, num, bha);
+                                for (i=0; i<num; i++)
+                                        brelse(bha[i]);
+                        }
+                }
+        }
+        else
+        {
+                udf_release_data(bh);
+                return -ENOENT;
+        }
+
+        while ( nf_pos < size )
+        {
+                filp->f_pos = nf_pos + 1;
+
+                fi = udf_fileident_read(dir, &nf_pos, &fibh, &cfi, &bloc, &extoffset, &eloc, &elen, &offset, &bh);
+
+                if (!fi)
+                {
+                        if (fibh.sbh != fibh.ebh)
+                                udf_release_data(fibh.ebh);
+                        udf_release_data(fibh.sbh);
+                        udf_release_data(bh);
+                        return 0;
+                }
+
+                liu = le16_to_cpu(cfi.lengthOfImpUse);
+                lfi = cfi.lengthFileIdent;
+
+                if (fibh.sbh == fibh.ebh)
+                        nameptr = fi->fileIdent + liu;
+                else
+                {
+                        int poffset;    /* Unpaded ending offset */
+
+                        poffset = fibh.soffset + sizeof(struct fileIdentDesc) + liu + lfi;
+
+                        if (poffset >= lfi)
+                                nameptr = (char *)(fibh.ebh->b_data + poffset - lfi);
+                        else
+                        {
+                                nameptr = fname;
+                                memcpy(nameptr, fi->fileIdent + liu, lfi - poffset);
+                                memcpy(nameptr + lfi - poffset, fibh.ebh->b_data, poffset);
+                        }
+                }
+
+                if ( (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) != 0 )
+                {
+                        if ( !UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE) )
+                                continue;
+                }
+                
+                if ( (cfi.fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0 )
+                {
+                        if ( !UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE) )
+                                continue;
+                }
+
+                if ( cfi.fileCharacteristics & FID_FILE_CHAR_PARENT )
+                {
+                        iblock = parent_ino(filp->f_dentry);
+                        flen = 2;
+                        memcpy(fname, "..", flen);
+                        dt_type = DT_DIR;
+                }
+                else
+                {
+                        kernel_lb_addr tloc = lelb_to_cpu(cfi.icb.extLocation);
+
+                        iblock = udf_get_lb_pblock(dir->i_sb, tloc, 0);
+                        flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi);
+                        dt_type = DT_UNKNOWN;
+                }
+
+                if (flen)
+                {
+                        if (filldir(dirent, fname, flen, filp->f_pos, iblock, dt_type) < 0)
+                        {
+                                if (fibh.sbh != fibh.ebh)
+                                        udf_release_data(fibh.ebh);
+                                udf_release_data(fibh.sbh);
+                                udf_release_data(bh);
+                                return 0;
+                        }
+                }
+        } /* end while */
+
+        filp->f_pos = nf_pos + 1;
+
+        if (fibh.sbh != fibh.ebh)
+                udf_release_data(fibh.ebh);
+        udf_release_data(fibh.sbh);
+        udf_release_data(bh);
+
+        return 0;
+}