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, 363 insertions, 0 deletions

diff --git a/fs/hpfs/ea.c b/fs/hpfs/ea.c
new file mode 100644
index 000000000000..66339dc030e4
--- /dev/null
+++ b/fs/hpfs/ea.c
@@ -0,0 +1,363 @@
+/*
+ *  linux/fs/hpfs/ea.c
+ *
+ *  Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
+ *
+ *  handling extended attributes
+ */
+
+#include "hpfs_fn.h"
+
+/* Remove external extended attributes. ano specifies whether a is a 
+   direct sector where eas starts or an anode */
+
+void hpfs_ea_ext_remove(struct super_block *s, secno a, int ano, unsigned len)
+{
+        unsigned pos = 0;
+        while (pos < len) {
+                char ex[4 + 255 + 1 + 8];
+                struct extended_attribute *ea = (struct extended_attribute *)ex;
+                if (pos + 4 > len) {
+                        hpfs_error(s, "EAs don't end correctly, %s %08x, len %08x",
+                                ano ? "anode" : "sectors", a, len);
+                        return;
+                }
+                if (hpfs_ea_read(s, a, ano, pos, 4, ex)) return;
+                if (ea->indirect) {
+                        if (ea->valuelen != 8) {
+                                hpfs_error(s, "ea->indirect set while ea->valuelen!=8, %s %08x, pos %08x",
+                                        ano ? "anode" : "sectors", a, pos);
+                                return;
+                        }
+                        if (hpfs_ea_read(s, a, ano, pos + 4, ea->namelen + 9, ex+4))
+                                return;
+                        hpfs_ea_remove(s, ea_sec(ea), ea->anode, ea_len(ea));
+                }
+                pos += ea->namelen + ea->valuelen + 5;
+        }
+        if (!ano) hpfs_free_sectors(s, a, (len+511) >> 9);
+        else {
+                struct buffer_head *bh;
+                struct anode *anode;
+                if ((anode = hpfs_map_anode(s, a, &bh))) {
+                        hpfs_remove_btree(s, &anode->btree);
+                        brelse(bh);
+                        hpfs_free_sectors(s, a, 1);
+                }
+        }
+}
+
+static char *get_indirect_ea(struct super_block *s, int ano, secno a, int size)
+{
+        char *ret;
+        if (!(ret = kmalloc(size + 1, GFP_NOFS))) {
+                printk("HPFS: out of memory for EA\n");
+                return NULL;
+        }
+        if (hpfs_ea_read(s, a, ano, 0, size, ret)) {
+                kfree(ret);
+                return NULL;
+        }
+        ret[size] = 0;
+        return ret;
+}
+
+static void set_indirect_ea(struct super_block *s, int ano, secno a, char *data,
+                            int size)
+{
+        hpfs_ea_write(s, a, ano, 0, size, data);
+}
+
+/* Read an extended attribute named 'key' into the provided buffer */
+
+int hpfs_read_ea(struct super_block *s, struct fnode *fnode, char *key,
+                char *buf, int size)
+{
+        unsigned pos;
+        int ano, len;
+        secno a;
+        struct extended_attribute *ea;
+        struct extended_attribute *ea_end = fnode_end_ea(fnode);
+        for (ea = fnode_ea(fnode); ea < ea_end; ea = next_ea(ea))
+                if (!strcmp(ea->name, key)) {
+                        if (ea->indirect)
+                                goto indirect;
+                        if (ea->valuelen >= size)
+                                return -EINVAL;
+                        memcpy(buf, ea_data(ea), ea->valuelen);
+                        buf[ea->valuelen] = 0;
+                        return 0;
+                }
+        a = fnode->ea_secno;
+        len = fnode->ea_size_l;
+        ano = fnode->ea_anode;
+        pos = 0;
+        while (pos < len) {
+                char ex[4 + 255 + 1 + 8];
+                ea = (struct extended_attribute *)ex;
+                if (pos + 4 > len) {
+                        hpfs_error(s, "EAs don't end correctly, %s %08x, len %08x",
+                                ano ? "anode" : "sectors", a, len);
+                        return -EIO;
+                }
+                if (hpfs_ea_read(s, a, ano, pos, 4, ex)) return -EIO;
+                if (hpfs_ea_read(s, a, ano, pos + 4, ea->namelen + 1 + (ea->indirect ? 8 : 0), ex + 4))
+                        return -EIO;
+                if (!strcmp(ea->name, key)) {
+                        if (ea->indirect)
+                                goto indirect;
+                        if (ea->valuelen >= size)
+                                return -EINVAL;
+                        if (hpfs_ea_read(s, a, ano, pos + 4 + ea->namelen + 1, ea->valuelen, buf))
+                                return -EIO;
+                        buf[ea->valuelen] = 0;
+                        return 0;
+                }
+                pos += ea->namelen + ea->valuelen + 5;
+        }
+        return -ENOENT;
+indirect:
+        if (ea_len(ea) >= size)
+                return -EINVAL;
+        if (hpfs_ea_read(s, ea_sec(ea), ea->anode, 0, ea_len(ea), buf))
+                return -EIO;
+        buf[ea_len(ea)] = 0;
+        return 0;
+}
+
+/* Read an extended attribute named 'key' */
+char *hpfs_get_ea(struct super_block *s, struct fnode *fnode, char *key, int *size)
+{
+        char *ret;
+        unsigned pos;
+        int ano, len;
+        secno a;
+        struct extended_attribute *ea;
+        struct extended_attribute *ea_end = fnode_end_ea(fnode);
+        for (ea = fnode_ea(fnode); ea < ea_end; ea = next_ea(ea))
+                if (!strcmp(ea->name, key)) {
+                        if (ea->indirect)
+                                return get_indirect_ea(s, ea->anode, ea_sec(ea), *size = ea_len(ea));
+                        if (!(ret = kmalloc((*size = ea->valuelen) + 1, GFP_NOFS))) {
+                                printk("HPFS: out of memory for EA\n");
+                                return NULL;
+                        }
+                        memcpy(ret, ea_data(ea), ea->valuelen);
+                        ret[ea->valuelen] = 0;
+                        return ret;
+                }
+        a = fnode->ea_secno;
+        len = fnode->ea_size_l;
+        ano = fnode->ea_anode;
+        pos = 0;
+        while (pos < len) {
+                char ex[4 + 255 + 1 + 8];
+                ea = (struct extended_attribute *)ex;
+                if (pos + 4 > len) {
+                        hpfs_error(s, "EAs don't end correctly, %s %08x, len %08x",
+                                ano ? "anode" : "sectors", a, len);
+                        return NULL;
+                }
+                if (hpfs_ea_read(s, a, ano, pos, 4, ex)) return NULL;
+                if (hpfs_ea_read(s, a, ano, pos + 4, ea->namelen + 1 + (ea->indirect ? 8 : 0), ex + 4))
+                        return NULL;
+                if (!strcmp(ea->name, key)) {
+                        if (ea->indirect)
+                                return get_indirect_ea(s, ea->anode, ea_sec(ea), *size = ea_len(ea));
+                        if (!(ret = kmalloc((*size = ea->valuelen) + 1, GFP_NOFS))) {
+                                printk("HPFS: out of memory for EA\n");
+                                return NULL;
+                        }
+                        if (hpfs_ea_read(s, a, ano, pos + 4 + ea->namelen + 1, ea->valuelen, ret)) {
+                                kfree(ret);
+                                return NULL;
+                        }
+                        ret[ea->valuelen] = 0;
+                        return ret;
+                }
+                pos += ea->namelen + ea->valuelen + 5;
+        }
+        return NULL;
+}
+
+/* 
+ * Update or create extended attribute 'key' with value 'data'. Note that
+ * when this ea exists, it MUST have the same size as size of data.
+ * This driver can't change sizes of eas ('cause I just don't need it).
+ */
+
+void hpfs_set_ea(struct inode *inode, struct fnode *fnode, char *key, char *data, int size)
+{
+        fnode_secno fno = inode->i_ino;
+        struct super_block *s = inode->i_sb;
+        unsigned pos;
+        int ano, len;
+        secno a;
+        unsigned char h[4];
+        struct extended_attribute *ea;
+        struct extended_attribute *ea_end = fnode_end_ea(fnode);
+        for (ea = fnode_ea(fnode); ea < ea_end; ea = next_ea(ea))
+                if (!strcmp(ea->name, key)) {
+                        if (ea->indirect) {
+                                if (ea_len(ea) == size)
+                                        set_indirect_ea(s, ea->anode, ea_sec(ea), data, size);
+                        } else if (ea->valuelen == size) {
+                                memcpy(ea_data(ea), data, size);
+                        }
+                        return;
+                }
+        a = fnode->ea_secno;
+        len = fnode->ea_size_l;
+        ano = fnode->ea_anode;
+        pos = 0;
+        while (pos < len) {
+                char ex[4 + 255 + 1 + 8];
+                ea = (struct extended_attribute *)ex;
+                if (pos + 4 > len) {
+                        hpfs_error(s, "EAs don't end correctly, %s %08x, len %08x",
+                                ano ? "anode" : "sectors", a, len);
+                        return;
+                }
+                if (hpfs_ea_read(s, a, ano, pos, 4, ex)) return;
+                if (hpfs_ea_read(s, a, ano, pos + 4, ea->namelen + 1 + (ea->indirect ? 8 : 0), ex + 4))
+                        return;
+                if (!strcmp(ea->name, key)) {
+                        if (ea->indirect) {
+                                if (ea_len(ea) == size)
+                                        set_indirect_ea(s, ea->anode, ea_sec(ea), data, size);
+                        }
+                        else {
+                                if (ea->valuelen == size)
+                                        hpfs_ea_write(s, a, ano, pos + 4 + ea->namelen + 1, size, data);
+                        }
+                        return;
+                }
+                pos += ea->namelen + ea->valuelen + 5;
+        }
+        if (!fnode->ea_offs) {
+                /*if (fnode->ea_size_s) {
+                        hpfs_error(s, "fnode %08x: ea_size_s == %03x, ea_offs == 0",
+                                inode->i_ino, fnode->ea_size_s);
+                        return;
+                }*/
+                fnode->ea_offs = 0xc4;
+        }
+        if (fnode->ea_offs < 0xc4 || fnode->ea_offs + fnode->acl_size_s + fnode->ea_size_s > 0x200) {
+                hpfs_error(s, "fnode %08x: ea_offs == %03x, ea_size_s == %03x",
+                        inode->i_ino, fnode->ea_offs, fnode->ea_size_s);
+                return;
+        }
+        if ((fnode->ea_size_s || !fnode->ea_size_l) &&
+             fnode->ea_offs + fnode->acl_size_s + fnode->ea_size_s + strlen(key) + size + 5 <= 0x200) {
+                ea = fnode_end_ea(fnode);
+                *(char *)ea = 0;
+                ea->namelen = strlen(key);
+                ea->valuelen = size;
+                strcpy(ea->name, key);
+                memcpy(ea_data(ea), data, size);
+                fnode->ea_size_s += strlen(key) + size + 5;
+                goto ret;
+        }
+        /* Most the code here is 99.9993422% unused. I hope there are no bugs.
+           But what .. HPFS.IFS has also bugs in ea management. */
+        if (fnode->ea_size_s && !fnode->ea_size_l) {
+                secno n;
+                struct buffer_head *bh;
+                char *data;
+                if (!(n = hpfs_alloc_sector(s, fno, 1, 0, 1))) return;
+                if (!(data = hpfs_get_sector(s, n, &bh))) {
+                        hpfs_free_sectors(s, n, 1);
+                        return;
+                }
+                memcpy(data, fnode_ea(fnode), fnode->ea_size_s);
+                fnode->ea_size_l = fnode->ea_size_s;
+                fnode->ea_size_s = 0;
+                fnode->ea_secno = n;
+                fnode->ea_anode = 0;
+                mark_buffer_dirty(bh);
+                brelse(bh);
+        }
+        pos = fnode->ea_size_l + 5 + strlen(key) + size;
+        len = (fnode->ea_size_l + 511) >> 9;
+        if (pos >= 30000) goto bail;
+        while (((pos + 511) >> 9) > len) {
+                if (!len) {
+                        if (!(fnode->ea_secno = hpfs_alloc_sector(s, fno, 1, 0, 1)))
+                                goto bail;
+                        fnode->ea_anode = 0;
+                        len++;
+                } else if (!fnode->ea_anode) {
+                        if (hpfs_alloc_if_possible(s, fnode->ea_secno + len)) {
+                                len++;
+                        } else {
+                                /* Aargh... don't know how to create ea anodes :-( */
+                                /*struct buffer_head *bh;
+                                struct anode *anode;
+                                anode_secno a_s;
+                                if (!(anode = hpfs_alloc_anode(s, fno, &a_s, &bh)))
+                                        goto bail;
+                                anode->up = fno;
+                                anode->btree.fnode_parent = 1;
+                                anode->btree.n_free_nodes--;
+                                anode->btree.n_used_nodes++;
+                                anode->btree.first_free += 12;
+                                anode->u.external[0].disk_secno = fnode->ea_secno;
+                                anode->u.external[0].file_secno = 0;
+                                anode->u.external[0].length = len;
+                                mark_buffer_dirty(bh);
+                                brelse(bh);
+                                fnode->ea_anode = 1;
+                                fnode->ea_secno = a_s;*/
+                                secno new_sec;
+                                int i;
+                                if (!(new_sec = hpfs_alloc_sector(s, fno, 1, 1 - ((pos + 511) >> 9), 1)))
+                                        goto bail;
+                                for (i = 0; i < len; i++) {
+                                        struct buffer_head *bh1, *bh2;
+                                        void *b1, *b2;
+                                        if (!(b1 = hpfs_map_sector(s, fnode->ea_secno + i, &bh1, len - i - 1))) {
+                                                hpfs_free_sectors(s, new_sec, (pos + 511) >> 9);
+                                                goto bail;
+                                        }
+                                        if (!(b2 = hpfs_get_sector(s, new_sec + i, &bh2))) {
+                                                brelse(bh1);
+                                                hpfs_free_sectors(s, new_sec, (pos + 511) >> 9);
+                                                goto bail;
+                                        }
+                                        memcpy(b2, b1, 512);
+                                        brelse(bh1);
+                                        mark_buffer_dirty(bh2);
+                                        brelse(bh2);
+                                }
+                                hpfs_free_sectors(s, fnode->ea_secno, len);
+                                fnode->ea_secno = new_sec;
+                                len = (pos + 511) >> 9;
+                        }
+                }
+                if (fnode->ea_anode) {
+                        if (hpfs_add_sector_to_btree(s, fnode->ea_secno,
+                                                     0, len) != -1) {
+                                len++;
+                        } else {
+                                goto bail;
+                        }
+                }
+        }
+        h[0] = 0;
+        h[1] = strlen(key);
+        h[2] = size & 0xff;
+        h[3] = size >> 8;
+        if (hpfs_ea_write(s, fnode->ea_secno, fnode->ea_anode, fnode->ea_size_l, 4, h)) goto bail;
+        if (hpfs_ea_write(s, fnode->ea_secno, fnode->ea_anode, fnode->ea_size_l + 4, h[1] + 1, key)) goto bail;
+        if (hpfs_ea_write(s, fnode->ea_secno, fnode->ea_anode, fnode->ea_size_l + 5 + h[1], size, data)) goto bail;
+        fnode->ea_size_l = pos;
+        ret:
+        hpfs_i(inode)->i_ea_size += 5 + strlen(key) + size;
+        return;
+        bail:
+        if (fnode->ea_secno)
+                if (fnode->ea_anode) hpfs_truncate_btree(s, fnode->ea_secno, 1, (fnode->ea_size_l + 511) >> 9);
+                else hpfs_free_sectors(s, fnode->ea_secno + ((fnode->ea_size_l + 511) >> 9), len - ((fnode->ea_size_l + 511) >> 9));
+        else fnode->ea_secno = fnode->ea_size_l = 0;
+}
+