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-rw-r--r--fs/hpfs/Makefile8
-rw-r--r--fs/hpfs/alloc.c456
-rw-r--r--fs/hpfs/anode.c491
-rw-r--r--fs/hpfs/buffer.c175
-rw-r--r--fs/hpfs/dentry.c60
-rw-r--r--fs/hpfs/dir.c320
-rw-r--r--fs/hpfs/dnode.c1080
-rw-r--r--fs/hpfs/ea.c363
-rw-r--r--fs/hpfs/file.c140
-rw-r--r--fs/hpfs/hpfs.h493
-rw-r--r--fs/hpfs/hpfs_fn.h338
-rw-r--r--fs/hpfs/inode.c291
-rw-r--r--fs/hpfs/map.c275
-rw-r--r--fs/hpfs/name.c144
-rw-r--r--fs/hpfs/namei.c673
-rw-r--r--fs/hpfs/super.c701
16 files changed, 6008 insertions, 0 deletions
diff --git a/fs/hpfs/Makefile b/fs/hpfs/Makefile
new file mode 100644
index 00000000000..57b786fb982
--- /dev/null
+++ b/fs/hpfs/Makefile
@@ -0,0 +1,8 @@
+#
+# Makefile for the Linux hpfs filesystem routines.
+#
+
+obj-$(CONFIG_HPFS_FS) += hpfs.o
+
+hpfs-objs := alloc.o anode.o buffer.o dentry.o dir.o dnode.o ea.o file.o \
+ inode.o map.o name.o namei.o super.o
diff --git a/fs/hpfs/alloc.c b/fs/hpfs/alloc.c
new file mode 100644
index 00000000000..5503e2c2891
--- /dev/null
+++ b/fs/hpfs/alloc.c
@@ -0,0 +1,456 @@
+/*
+ * linux/fs/hpfs/alloc.c
+ *
+ * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
+ *
+ * HPFS bitmap operations
+ */
+
+#include "hpfs_fn.h"
+
+static int hpfs_alloc_if_possible_nolock(struct super_block *s, secno sec);
+
+/*
+ * Check if a sector is allocated in bitmap
+ * This is really slow. Turned on only if chk==2
+ */
+
+static int chk_if_allocated(struct super_block *s, secno sec, char *msg)
+{
+ struct quad_buffer_head qbh;
+ unsigned *bmp;
+ if (!(bmp = hpfs_map_bitmap(s, sec >> 14, &qbh, "chk"))) goto fail;
+ if ((bmp[(sec & 0x3fff) >> 5] >> (sec & 0x1f)) & 1) {
+ hpfs_error(s, "sector '%s' - %08x not allocated in bitmap", msg, sec);
+ goto fail1;
+ }
+ hpfs_brelse4(&qbh);
+ if (sec >= hpfs_sb(s)->sb_dirband_start && sec < hpfs_sb(s)->sb_dirband_start + hpfs_sb(s)->sb_dirband_size) {
+ unsigned ssec = (sec - hpfs_sb(s)->sb_dirband_start) / 4;
+ if (!(bmp = hpfs_map_dnode_bitmap(s, &qbh))) goto fail;
+ if ((bmp[ssec >> 5] >> (ssec & 0x1f)) & 1) {
+ hpfs_error(s, "sector '%s' - %08x not allocated in directory bitmap", msg, sec);
+ goto fail1;
+ }
+ hpfs_brelse4(&qbh);
+ }
+ return 0;
+ fail1:
+ hpfs_brelse4(&qbh);
+ fail:
+ return 1;
+}
+
+/*
+ * Check if sector(s) have proper number and additionally check if they're
+ * allocated in bitmap.
+ */
+
+int hpfs_chk_sectors(struct super_block *s, secno start, int len, char *msg)
+{
+ if (start + len < start || start < 0x12 ||
+ start + len > hpfs_sb(s)->sb_fs_size) {
+ hpfs_error(s, "sector(s) '%s' badly placed at %08x", msg, start);
+ return 1;
+ }
+ if (hpfs_sb(s)->sb_chk>=2) {
+ int i;
+ for (i = 0; i < len; i++)
+ if (chk_if_allocated(s, start + i, msg)) return 1;
+ }
+ return 0;
+}
+
+static secno alloc_in_bmp(struct super_block *s, secno near, unsigned n, unsigned forward)
+{
+ struct quad_buffer_head qbh;
+ unsigned *bmp;
+ unsigned bs = near & ~0x3fff;
+ unsigned nr = (near & 0x3fff) & ~(n - 1);
+ /*unsigned mnr;*/
+ unsigned i, q;
+ int a, b;
+ secno ret = 0;
+ if (n != 1 && n != 4) {
+ hpfs_error(s, "Bad allocation size: %d", n);
+ return 0;
+ }
+ lock_super(s);
+ if (bs != ~0x3fff) {
+ if (!(bmp = hpfs_map_bitmap(s, near >> 14, &qbh, "aib"))) goto uls;
+ } else {
+ if (!(bmp = hpfs_map_dnode_bitmap(s, &qbh))) goto uls;
+ }
+ if (!tstbits(bmp, nr, n + forward)) {
+ ret = bs + nr;
+ goto rt;
+ }
+ /*if (!tstbits(bmp, nr + n, n + forward)) {
+ ret = bs + nr + n;
+ goto rt;
+ }*/
+ q = nr + n; b = 0;
+ while ((a = tstbits(bmp, q, n + forward)) != 0) {
+ q += a;
+ if (n != 1) q = ((q-1)&~(n-1))+n;
+ if (!b) {
+ if (q>>5 != nr>>5) {
+ b = 1;
+ q = nr & 0x1f;
+ }
+ } else if (q > nr) break;
+ }
+ if (!a) {
+ ret = bs + q;
+ goto rt;
+ }
+ nr >>= 5;
+ /*for (i = nr + 1; i != nr; i++, i &= 0x1ff) {*/
+ i = nr;
+ do {
+ if (!bmp[i]) goto cont;
+ if (n + forward >= 0x3f && bmp[i] != -1) goto cont;
+ q = i<<5;
+ if (i > 0) {
+ unsigned k = bmp[i-1];
+ while (k & 0x80000000) {
+ q--; k <<= 1;
+ }
+ }
+ if (n != 1) q = ((q-1)&~(n-1))+n;
+ while ((a = tstbits(bmp, q, n + forward)) != 0) {
+ q += a;
+ if (n != 1) q = ((q-1)&~(n-1))+n;
+ if (q>>5 > i) break;
+ }
+ if (!a) {
+ ret = bs + q;
+ goto rt;
+ }
+ cont:
+ i++, i &= 0x1ff;
+ } while (i != nr);
+ rt:
+ if (ret) {
+ if (hpfs_sb(s)->sb_chk && ((ret >> 14) != (bs >> 14) || (bmp[(ret & 0x3fff) >> 5] | ~(((1 << n) - 1) << (ret & 0x1f))) != 0xffffffff)) {
+ hpfs_error(s, "Allocation doesn't work! Wanted %d, allocated at %08x", n, ret);
+ ret = 0;
+ goto b;
+ }
+ bmp[(ret & 0x3fff) >> 5] &= ~(((1 << n) - 1) << (ret & 0x1f));
+ hpfs_mark_4buffers_dirty(&qbh);
+ }
+ b:
+ hpfs_brelse4(&qbh);
+ uls:
+ unlock_super(s);
+ return ret;
+}
+
+/*
+ * Allocation strategy: 1) search place near the sector specified
+ * 2) search bitmap where free sectors last found
+ * 3) search all bitmaps
+ * 4) search all bitmaps ignoring number of pre-allocated
+ * sectors
+ */
+
+secno hpfs_alloc_sector(struct super_block *s, secno near, unsigned n, int forward, int lock)
+{
+ secno sec;
+ int i;
+ unsigned n_bmps;
+ struct hpfs_sb_info *sbi = hpfs_sb(s);
+ int f_p = 0;
+ int near_bmp;
+ if (forward < 0) {
+ forward = -forward;
+ f_p = 1;
+ }
+ if (lock) hpfs_lock_creation(s);
+ n_bmps = (sbi->sb_fs_size + 0x4000 - 1) >> 14;
+ if (near && near < sbi->sb_fs_size) {
+ if ((sec = alloc_in_bmp(s, near, n, f_p ? forward : forward/4))) goto ret;
+ near_bmp = near >> 14;
+ } else near_bmp = n_bmps / 2;
+ /*
+ if (b != -1) {
+ if ((sec = alloc_in_bmp(s, b<<14, n, f_p ? forward : forward/2))) {
+ b &= 0x0fffffff;
+ goto ret;
+ }
+ if (b > 0x10000000) if ((sec = alloc_in_bmp(s, (b&0xfffffff)<<14, n, f_p ? forward : 0))) goto ret;
+ */
+ if (!f_p) if (forward > sbi->sb_max_fwd_alloc) forward = sbi->sb_max_fwd_alloc;
+ less_fwd:
+ for (i = 0; i < n_bmps; i++) {
+ if (near_bmp+i < n_bmps && ((sec = alloc_in_bmp(s, (near_bmp+i) << 14, n, forward)))) {
+ sbi->sb_c_bitmap = near_bmp+i;
+ goto ret;
+ }
+ if (!forward) {
+ if (near_bmp-i-1 >= 0 && ((sec = alloc_in_bmp(s, (near_bmp-i-1) << 14, n, forward)))) {
+ sbi->sb_c_bitmap = near_bmp-i-1;
+ goto ret;
+ }
+ } else {
+ if (near_bmp+i >= n_bmps && ((sec = alloc_in_bmp(s, (near_bmp+i-n_bmps) << 14, n, forward)))) {
+ sbi->sb_c_bitmap = near_bmp+i-n_bmps;
+ goto ret;
+ }
+ }
+ if (i == 1 && sbi->sb_c_bitmap != -1 && ((sec = alloc_in_bmp(s, (sbi->sb_c_bitmap) << 14, n, forward)))) {
+ goto ret;
+ }
+ }
+ if (!f_p) {
+ if (forward) {
+ sbi->sb_max_fwd_alloc = forward * 3 / 4;
+ forward /= 2;
+ goto less_fwd;
+ }
+ }
+ sec = 0;
+ ret:
+ if (sec && f_p) {
+ for (i = 0; i < forward; i++) {
+ if (!hpfs_alloc_if_possible_nolock(s, sec + i + 1)) {
+ hpfs_error(s, "Prealloc doesn't work! Wanted %d, allocated at %08x, can't allocate %d", forward, sec, i);
+ sec = 0;
+ break;
+ }
+ }
+ }
+ if (lock) hpfs_unlock_creation(s);
+ return sec;
+}
+
+static secno alloc_in_dirband(struct super_block *s, secno near, int lock)
+{
+ unsigned nr = near;
+ secno sec;
+ struct hpfs_sb_info *sbi = hpfs_sb(s);
+ if (nr < sbi->sb_dirband_start)
+ nr = sbi->sb_dirband_start;
+ if (nr >= sbi->sb_dirband_start + sbi->sb_dirband_size)
+ nr = sbi->sb_dirband_start + sbi->sb_dirband_size - 4;
+ nr -= sbi->sb_dirband_start;
+ nr >>= 2;
+ if (lock) hpfs_lock_creation(s);
+ sec = alloc_in_bmp(s, (~0x3fff) | nr, 1, 0);
+ if (lock) hpfs_unlock_creation(s);
+ if (!sec) return 0;
+ return ((sec & 0x3fff) << 2) + sbi->sb_dirband_start;
+}
+
+/* Alloc sector if it's free */
+
+static int hpfs_alloc_if_possible_nolock(struct super_block *s, secno sec)
+{
+ struct quad_buffer_head qbh;
+ unsigned *bmp;
+ lock_super(s);
+ if (!(bmp = hpfs_map_bitmap(s, sec >> 14, &qbh, "aip"))) goto end;
+ if (bmp[(sec & 0x3fff) >> 5] & (1 << (sec & 0x1f))) {
+ bmp[(sec & 0x3fff) >> 5] &= ~(1 << (sec & 0x1f));
+ hpfs_mark_4buffers_dirty(&qbh);
+ hpfs_brelse4(&qbh);
+ unlock_super(s);
+ return 1;
+ }
+ hpfs_brelse4(&qbh);
+ end:
+ unlock_super(s);
+ return 0;
+}
+
+int hpfs_alloc_if_possible(struct super_block *s, secno sec)
+{
+ int r;
+ hpfs_lock_creation(s);
+ r = hpfs_alloc_if_possible_nolock(s, sec);
+ hpfs_unlock_creation(s);
+ return r;
+}
+
+/* Free sectors in bitmaps */
+
+void hpfs_free_sectors(struct super_block *s, secno sec, unsigned n)
+{
+ struct quad_buffer_head qbh;
+ unsigned *bmp;
+ struct hpfs_sb_info *sbi = hpfs_sb(s);
+ /*printk("2 - ");*/
+ if (!n) return;
+ if (sec < 0x12) {
+ hpfs_error(s, "Trying to free reserved sector %08x", sec);
+ return;
+ }
+ lock_super(s);
+ sbi->sb_max_fwd_alloc += n > 0xffff ? 0xffff : n;
+ if (sbi->sb_max_fwd_alloc > 0xffffff) sbi->sb_max_fwd_alloc = 0xffffff;
+ new_map:
+ if (!(bmp = hpfs_map_bitmap(s, sec >> 14, &qbh, "free"))) {
+ unlock_super(s);
+ return;
+ }
+ new_tst:
+ if ((bmp[(sec & 0x3fff) >> 5] >> (sec & 0x1f) & 1)) {
+ hpfs_error(s, "sector %08x not allocated", sec);
+ hpfs_brelse4(&qbh);
+ unlock_super(s);
+ return;
+ }
+ bmp[(sec & 0x3fff) >> 5] |= 1 << (sec & 0x1f);
+ if (!--n) {
+ hpfs_mark_4buffers_dirty(&qbh);
+ hpfs_brelse4(&qbh);
+ unlock_super(s);
+ return;
+ }
+ if (!(++sec & 0x3fff)) {
+ hpfs_mark_4buffers_dirty(&qbh);
+ hpfs_brelse4(&qbh);
+ goto new_map;
+ }
+ goto new_tst;
+}
+
+/*
+ * Check if there are at least n free dnodes on the filesystem.
+ * Called before adding to dnode. If we run out of space while
+ * splitting dnodes, it would corrupt dnode tree.
+ */
+
+int hpfs_check_free_dnodes(struct super_block *s, int n)
+{
+ int n_bmps = (hpfs_sb(s)->sb_fs_size + 0x4000 - 1) >> 14;
+ int b = hpfs_sb(s)->sb_c_bitmap & 0x0fffffff;
+ int i, j;
+ unsigned *bmp;
+ struct quad_buffer_head qbh;
+ if ((bmp = hpfs_map_dnode_bitmap(s, &qbh))) {
+ for (j = 0; j < 512; j++) {
+ unsigned k;
+ if (!bmp[j]) continue;
+ for (k = bmp[j]; k; k >>= 1) if (k & 1) if (!--n) {
+ hpfs_brelse4(&qbh);
+ return 0;
+ }
+ }
+ }
+ hpfs_brelse4(&qbh);
+ i = 0;
+ if (hpfs_sb(s)->sb_c_bitmap != -1) {
+ bmp = hpfs_map_bitmap(s, b, &qbh, "chkdn1");
+ goto chk_bmp;
+ }
+ chk_next:
+ if (i == b) i++;
+ if (i >= n_bmps) return 1;
+ bmp = hpfs_map_bitmap(s, i, &qbh, "chkdn2");
+ chk_bmp:
+ if (bmp) {
+ for (j = 0; j < 512; j++) {
+ unsigned k;
+ if (!bmp[j]) continue;
+ for (k = 0xf; k; k <<= 4)
+ if ((bmp[j] & k) == k) {
+ if (!--n) {
+ hpfs_brelse4(&qbh);
+ return 0;
+ }
+ }
+ }
+ hpfs_brelse4(&qbh);
+ }
+ i++;
+ goto chk_next;
+}
+
+void hpfs_free_dnode(struct super_block *s, dnode_secno dno)
+{
+ if (hpfs_sb(s)->sb_chk) if (dno & 3) {
+ hpfs_error(s, "hpfs_free_dnode: dnode %08x not aligned", dno);
+ return;
+ }
+ if (dno < hpfs_sb(s)->sb_dirband_start ||
+ dno >= hpfs_sb(s)->sb_dirband_start + hpfs_sb(s)->sb_dirband_size) {
+ hpfs_free_sectors(s, dno, 4);
+ } else {
+ struct quad_buffer_head qbh;
+ unsigned *bmp;
+ unsigned ssec = (dno - hpfs_sb(s)->sb_dirband_start) / 4;
+ lock_super(s);
+ if (!(bmp = hpfs_map_dnode_bitmap(s, &qbh))) {
+ unlock_super(s);
+ return;
+ }
+ bmp[ssec >> 5] |= 1 << (ssec & 0x1f);
+ hpfs_mark_4buffers_dirty(&qbh);
+ hpfs_brelse4(&qbh);
+ unlock_super(s);
+ }
+}
+
+struct dnode *hpfs_alloc_dnode(struct super_block *s, secno near,
+ dnode_secno *dno, struct quad_buffer_head *qbh,
+ int lock)
+{
+ struct dnode *d;
+ if (hpfs_count_one_bitmap(s, hpfs_sb(s)->sb_dmap) > FREE_DNODES_ADD) {
+ if (!(*dno = alloc_in_dirband(s, near, lock)))
+ if (!(*dno = hpfs_alloc_sector(s, near, 4, 0, lock))) return NULL;
+ } else {
+ if (!(*dno = hpfs_alloc_sector(s, near, 4, 0, lock)))
+ if (!(*dno = alloc_in_dirband(s, near, lock))) return NULL;
+ }
+ if (!(d = hpfs_get_4sectors(s, *dno, qbh))) {
+ hpfs_free_dnode(s, *dno);
+ return NULL;
+ }
+ memset(d, 0, 2048);
+ d->magic = DNODE_MAGIC;
+ d->first_free = 52;
+ d->dirent[0] = 32;
+ d->dirent[2] = 8;
+ d->dirent[30] = 1;
+ d->dirent[31] = 255;
+ d->self = *dno;
+ return d;
+}
+
+struct fnode *hpfs_alloc_fnode(struct super_block *s, secno near, fnode_secno *fno,
+ struct buffer_head **bh)
+{
+ struct fnode *f;
+ if (!(*fno = hpfs_alloc_sector(s, near, 1, FNODE_ALLOC_FWD, 1))) return NULL;
+ if (!(f = hpfs_get_sector(s, *fno, bh))) {
+ hpfs_free_sectors(s, *fno, 1);
+ return NULL;
+ }
+ memset(f, 0, 512);
+ f->magic = FNODE_MAGIC;
+ f->ea_offs = 0xc4;
+ f->btree.n_free_nodes = 8;
+ f->btree.first_free = 8;
+ return f;
+}
+
+struct anode *hpfs_alloc_anode(struct super_block *s, secno near, anode_secno *ano,
+ struct buffer_head **bh)
+{
+ struct anode *a;
+ if (!(*ano = hpfs_alloc_sector(s, near, 1, ANODE_ALLOC_FWD, 1))) return NULL;
+ if (!(a = hpfs_get_sector(s, *ano, bh))) {
+ hpfs_free_sectors(s, *ano, 1);
+ return NULL;
+ }
+ memset(a, 0, 512);
+ a->magic = ANODE_MAGIC;
+ a->self = *ano;
+ a->btree.n_free_nodes = 40;
+ a->btree.n_used_nodes = 0;
+ a->btree.first_free = 8;
+ return a;
+}
diff --git a/fs/hpfs/anode.c b/fs/hpfs/anode.c
new file mode 100644
index 00000000000..1aa88c4e096
--- /dev/null
+++ b/fs/hpfs/anode.c
@@ -0,0 +1,491 @@
+/*
+ * linux/fs/hpfs/anode.c
+ *
+ * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
+ *
+ * handling HPFS anode tree that contains file allocation info
+ */
+
+#include "hpfs_fn.h"
+
+/* Find a sector in allocation tree */
+
+secno hpfs_bplus_lookup(struct super_block *s, struct inode *inode,
+ struct bplus_header *btree, unsigned sec,
+ struct buffer_head *bh)
+{
+ anode_secno a = -1;
+ struct anode *anode;
+ int i;
+ int c1, c2 = 0;
+ go_down:
+ if (hpfs_sb(s)->sb_chk) if (hpfs_stop_cycles(s, a, &c1, &c2, "hpfs_bplus_lookup")) return -1;
+ if (btree->internal) {
+ for (i = 0; i < btree->n_used_nodes; i++)
+ if (btree->u.internal[i].file_secno > sec) {
+ a = btree->u.internal[i].down;
+ brelse(bh);
+ if (!(anode = hpfs_map_anode(s, a, &bh))) return -1;
+ btree = &anode->btree;
+ goto go_down;
+ }
+ hpfs_error(s, "sector %08x not found in internal anode %08x", sec, a);
+ brelse(bh);
+ return -1;
+ }
+ for (i = 0; i < btree->n_used_nodes; i++)
+ if (btree->u.external[i].file_secno <= sec &&
+ btree->u.external[i].file_secno + btree->u.external[i].length > sec) {
+ a = btree->u.external[i].disk_secno + sec - btree->u.external[i].file_secno;
+ if (hpfs_sb(s)->sb_chk) if (hpfs_chk_sectors(s, a, 1, "data")) {
+ brelse(bh);
+ return -1;
+ }
+ if (inode) {
+ struct hpfs_inode_info *hpfs_inode = hpfs_i(inode);
+ hpfs_inode->i_file_sec = btree->u.external[i].file_secno;
+ hpfs_inode->i_disk_sec = btree->u.external[i].disk_secno;
+ hpfs_inode->i_n_secs = btree->u.external[i].length;
+ }
+ brelse(bh);
+ return a;
+ }
+ hpfs_error(s, "sector %08x not found in external anode %08x", sec, a);
+ brelse(bh);
+ return -1;
+}
+
+/* Add a sector to tree */
+
+secno hpfs_add_sector_to_btree(struct super_block *s, secno node, int fnod, unsigned fsecno)
+{
+ struct bplus_header *btree;
+ struct anode *anode = NULL, *ranode = NULL;
+ struct fnode *fnode;
+ anode_secno a, na = -1, ra, up = -1;
+ secno se;
+ struct buffer_head *bh, *bh1, *bh2;
+ int n;
+ unsigned fs;
+ int c1, c2 = 0;
+ if (fnod) {
+ if (!(fnode = hpfs_map_fnode(s, node, &bh))) return -1;
+ btree = &fnode->btree;
+ } else {
+ if (!(anode = hpfs_map_anode(s, node, &bh))) return -1;
+ btree = &anode->btree;
+ }
+ a = node;
+ go_down:
+ if ((n = btree->n_used_nodes - 1) < -!!fnod) {
+ hpfs_error(s, "anode %08x has no entries", a);
+ brelse(bh);
+ return -1;
+ }
+ if (btree->internal) {
+ a = btree->u.internal[n].down;
+ btree->u.internal[n].file_secno = -1;
+ mark_buffer_dirty(bh);
+ brelse(bh);
+ if (hpfs_sb(s)->sb_chk)
+ if (hpfs_stop_cycles(s, a, &c1, &c2, "hpfs_add_sector_to_btree #1")) return -1;
+ if (!(anode = hpfs_map_anode(s, a, &bh))) return -1;
+ btree = &anode->btree;
+ goto go_down;
+ }
+ if (n >= 0) {
+ if (btree->u.external[n].file_secno + btree->u.external[n].length != fsecno) {
+ hpfs_error(s, "allocated size %08x, trying to add sector %08x, %cnode %08x",
+ btree->u.external[n].file_secno + btree->u.external[n].length, fsecno,
+ fnod?'f':'a', node);
+ brelse(bh);
+ return -1;
+ }
+ if (hpfs_alloc_if_possible(s, se = btree->u.external[n].disk_secno + btree->u.external[n].length)) {
+ btree->u.external[n].length++;
+ mark_buffer_dirty(bh);
+ brelse(bh);
+ return se;
+ }
+ } else {
+ if (fsecno) {
+ hpfs_error(s, "empty file %08x, trying to add sector %08x", node, fsecno);
+ brelse(bh);
+ return -1;
+ }
+ se = !fnod ? node : (node + 16384) & ~16383;
+ }
+ if (!(se = hpfs_alloc_sector(s, se, 1, fsecno*ALLOC_M>ALLOC_FWD_MAX ? ALLOC_FWD_MAX : fsecno*ALLOC_M<ALLOC_FWD_MIN ? ALLOC_FWD_MIN : fsecno*ALLOC_M, 1))) {
+ brelse(bh);
+ return -1;
+ }
+ fs = n < 0 ? 0 : btree->u.external[n].file_secno + btree->u.external[n].length;
+ if (!btree->n_free_nodes) {
+ up = a != node ? anode->up : -1;
+ if (!(anode = hpfs_alloc_anode(s, a, &na, &bh1))) {
+ brelse(bh);
+ hpfs_free_sectors(s, se, 1);
+ return -1;
+ }
+ if (a == node && fnod) {
+ anode->up = node;
+ anode->btree.fnode_parent = 1;
+ anode->btree.n_used_nodes = btree->n_used_nodes;
+ anode->btree.first_free = btree->first_free;
+ anode->btree.n_free_nodes = 40 - anode->btree.n_used_nodes;
+ memcpy(&anode->u, &btree->u, btree->n_used_nodes * 12);
+ btree->internal = 1;
+ btree->n_free_nodes = 11;
+ btree->n_used_nodes = 1;
+ btree->first_free = (char *)&(btree->u.internal[1]) - (char *)btree;
+ btree->u.internal[0].file_secno = -1;
+ btree->u.internal[0].down = na;
+ mark_buffer_dirty(bh);
+ } else if (!(ranode = hpfs_alloc_anode(s, /*a*/0, &ra, &bh2))) {
+ brelse(bh);
+ brelse(bh1);
+ hpfs_free_sectors(s, se, 1);
+ hpfs_free_sectors(s, na, 1);
+ return -1;
+ }
+ brelse(bh);
+ bh = bh1;
+ btree = &anode->btree;
+ }
+ btree->n_free_nodes--; n = btree->n_used_nodes++;
+ btree->first_free += 12;
+ btree->u.external[n].disk_secno = se;
+ btree->u.external[n].file_secno = fs;
+ btree->u.external[n].length = 1;
+ mark_buffer_dirty(bh);
+ brelse(bh);
+ if ((a == node && fnod) || na == -1) return se;
+ c2 = 0;
+ while (up != -1) {
+ struct anode *new_anode;
+ if (hpfs_sb(s)->sb_chk)
+ if (hpfs_stop_cycles(s, up, &c1, &c2, "hpfs_add_sector_to_btree #2")) return -1;
+ if (up != node || !fnod) {
+ if (!(anode = hpfs_map_anode(s, up, &bh))) return -1;
+ btree = &anode->btree;
+ } else {
+ if (!(fnode = hpfs_map_fnode(s, up, &bh))) return -1;
+ btree = &fnode->btree;
+ }
+ if (btree->n_free_nodes) {
+ btree->n_free_nodes--; n = btree->n_used_nodes++;
+ btree->first_free += 8;
+ btree->u.internal[n].file_secno = -1;
+ btree->u.internal[n].down = na;
+ btree->u.internal[n-1].file_secno = fs;
+ mark_buffer_dirty(bh);
+ brelse(bh);
+ brelse(bh2);
+ hpfs_free_sectors(s, ra, 1);
+ if ((anode = hpfs_map_anode(s, na, &bh))) {
+ anode->up = up;
+ anode->btree.fnode_parent = up == node && fnod;
+ mark_buffer_dirty(bh);
+ brelse(bh);
+ }
+ return se;
+ }
+ up = up != node ? anode->up : -1;
+ btree->u.internal[btree->n_used_nodes - 1].file_secno = /*fs*/-1;
+ mark_buffer_dirty(bh);
+ brelse(bh);
+ a = na;
+ if ((new_anode = hpfs_alloc_anode(s, a, &na, &bh))) {
+ anode = new_anode;
+ /*anode->up = up != -1 ? up : ra;*/
+ anode->btree.internal = 1;
+ anode->btree.n_used_nodes = 1;
+ anode->btree.n_free_nodes = 59;
+ anode->btree.first_free = 16;
+ anode->btree.u.internal[0].down = a;
+ anode->btree.u.internal[0].file_secno = -1;
+ mark_buffer_dirty(bh);
+ brelse(bh);
+ if ((anode = hpfs_map_anode(s, a, &bh))) {
+ anode->up = na;
+ mark_buffer_dirty(bh);
+ brelse(bh);
+ }
+ } else na = a;
+ }
+ if ((anode = hpfs_map_anode(s, na, &bh))) {
+ anode->up = node;
+ if (fnod) anode->btree.fnode_parent = 1;
+ mark_buffer_dirty(bh);
+ brelse(bh);
+ }
+ if (!fnod) {
+ if (!(anode = hpfs_map_anode(s, node, &bh))) {
+ brelse(bh2);
+ return -1;
+ }
+ btree = &anode->btree;
+ } else {
+ if (!(fnode = hpfs_map_fnode(s, node, &bh))) {
+ brelse(bh2);
+ return -1;
+ }
+ btree = &fnode->btree;
+ }
+ ranode->up = node;
+ memcpy(&ranode->btree, btree, btree->first_free);
+ if (fnod) ranode->btree.fnode_parent = 1;
+ ranode->btree.n_free_nodes = (ranode->btree.internal ? 60 : 40) - ranode->btree.n_used_nodes;
+ if (ranode->btree.internal) for (n = 0; n < ranode->btree.n_used_nodes; n++) {
+ struct anode *unode;
+ if ((unode = hpfs_map_anode(s, ranode->u.internal[n].down, &bh1))) {
+ unode->up = ra;
+ unode->btree.fnode_parent = 0;
+ mark_buffer_dirty(bh1);
+ brelse(bh1);
+ }
+ }
+ btree->internal = 1;
+ btree->n_free_nodes = fnod ? 10 : 58;
+ btree->n_used_nodes = 2;
+ btree->first_free = (char *)&btree->u.internal[2] - (char *)btree;
+ btree->u.internal[0].file_secno = fs;
+ btree->u.internal[0].down = ra;
+ btree->u.internal[1].file_secno = -1;
+ btree->u.internal[1].down = na;
+ mark_buffer_dirty(bh);
+ brelse(bh);
+ mark_buffer_dirty(bh2);
+ brelse(bh2);
+ return se;
+}
+
+/*
+ * Remove allocation tree. Recursion would look much nicer but
+ * I want to avoid it because it can cause stack overflow.
+ */
+
+void hpfs_remove_btree(struct super_block *s, struct bplus_header *btree)
+{
+ struct bplus_header *btree1 = btree;
+ struct anode *anode = NULL;
+ anode_secno ano = 0, oano;
+ struct buffer_head *bh;
+ int level = 0;
+ int pos = 0;
+ int i;
+ int c1, c2 = 0;
+ int d1, d2;
+ go_down:
+ d2 = 0;
+ while (btree1->internal) {
+ ano = btree1->u.internal[pos].down;
+ if (level) brelse(bh);
+ if (hpfs_sb(s)->sb_chk)
+ if (hpfs_stop_cycles(s, ano, &d1, &d2, "hpfs_remove_btree #1"))
+ return;
+ if (!(anode = hpfs_map_anode(s, ano, &bh))) return;
+ btree1 = &anode->btree;
+ level++;
+ pos = 0;
+ }
+ for (i = 0; i < btree1->n_used_nodes; i++)
+ hpfs_free_sectors(s, btree1->u.external[i].disk_secno, btree1->u.external[i].length);
+ go_up:
+ if (!level) return;
+ brelse(bh);
+ if (hpfs_sb(s)->sb_chk)
+ if (hpfs_stop_cycles(s, ano, &c1, &c2, "hpfs_remove_btree #2")) return;
+ hpfs_free_sectors(s, ano, 1);
+ oano = ano;
+ ano = anode->up;
+ if (--level) {
+ if (!(anode = hpfs_map_anode(s, ano, &bh))) return;
+ btree1 = &anode->btree;
+ } else btree1 = btree;
+ for (i = 0; i < btree1->n_used_nodes; i++) {
+ if (btree1->u.internal[i].down == oano) {
+ if ((pos = i + 1) < btree1->n_used_nodes)
+ goto go_down;
+ else
+ goto go_up;
+ }
+ }
+ hpfs_error(s,
+ "reference to anode %08x not found in anode %08x "
+ "(probably bad up pointer)",
+ oano, level ? ano : -1);
+ if (level)
+ brelse(bh);
+}
+
+/* Just a wrapper around hpfs_bplus_lookup .. used for reading eas */
+
+static secno anode_lookup(struct super_block *s, anode_secno a, unsigned sec)
+{
+ struct anode *anode;
+ struct buffer_head *bh;
+ if (!(anode = hpfs_map_anode(s, a, &bh))) return -1;
+ return hpfs_bplus_lookup(s, NULL, &anode->btree, sec, bh);
+}
+
+int hpfs_ea_read(struct super_block *s, secno a, int ano, unsigned pos,
+ unsigned len, char *buf)
+{
+ struct buffer_head *bh;
+ char *data;
+ secno sec;
+ unsigned l;
+ while (len) {
+ if (ano) {
+ if ((sec = anode_lookup(s, a, pos >> 9)) == -1)
+ return -1;
+ } else sec = a + (pos >> 9);
+ if (hpfs_sb(s)->sb_chk) if (hpfs_chk_sectors(s, sec, 1, "ea #1")) return -1;
+ if (!(data = hpfs_map_sector(s, sec, &bh, (len - 1) >> 9)))
+ return -1;
+ l = 0x200 - (pos & 0x1ff); if (l > len) l = len;
+ memcpy(buf, data + (pos & 0x1ff), l);
+ brelse(bh);
+ buf += l; pos += l; len -= l;
+ }
+ return 0;
+}
+
+int hpfs_ea_write(struct super_block *s, secno a, int ano, unsigned pos,
+ unsigned len, char *buf)
+{
+ struct buffer_head *bh;
+ char *data;
+ secno sec;
+ unsigned l;
+ while (len) {
+ if (ano) {
+ if ((sec = anode_lookup(s, a, pos >> 9)) == -1)
+ return -1;
+ } else sec = a + (pos >> 9);
+ if (hpfs_sb(s)->sb_chk) if (hpfs_chk_sectors(s, sec, 1, "ea #2")) return -1;
+ if (!(data = hpfs_map_sector(s, sec, &bh, (len - 1) >> 9)))
+ return -1;
+ l = 0x200 - (pos & 0x1ff); if (l > len) l = len;
+ memcpy(data + (pos & 0x1ff), buf, l);
+ mark_buffer_dirty(bh);
+ brelse(bh);
+ buf += l; pos += l; len -= l;
+ }
+ return 0;
+}
+
+void hpfs_ea_remove(struct super_block *s, secno a, int ano, unsigned len)
+{
+ struct anode *anode;
+ struct buffer_head *bh;
+ if (ano) {
+ if (!(anode = hpfs_map_anode(s, a, &bh))) return;
+ hpfs_remove_btree(s, &anode->btree);
+ brelse(bh);
+ hpfs_free_sectors(s, a, 1);
+ } else hpfs_free_sectors(s, a, (len + 511) >> 9);
+}
+
+/* Truncate allocation tree. Doesn't join anodes - I hope it doesn't matter */
+
+void hpfs_truncate_btree(struct super_block *s, secno f, int fno, unsigned secs)
+{
+ struct fnode *fnode;
+ struct anode *anode;
+ struct buffer_head *bh;
+ struct bplus_header *btree;
+ anode_secno node = f;
+ int i, j, nodes;
+ int c1, c2 = 0;
+ if (fno) {
+ if (!(fnode = hpfs_map_fnode(s, f, &bh))) return;
+ btree = &fnode->btree;
+ } else {
+ if (!(anode = hpfs_map_anode(s, f, &bh))) return;
+ btree = &anode->btree;
+ }
+ if (!secs) {
+ hpfs_remove_btree(s, btree);
+ if (fno) {
+ btree->n_free_nodes = 8;
+ btree->n_used_nodes = 0;
+ btree->first_free = 8;
+ btree->internal = 0;
+ mark_buffer_dirty(bh);
+ } else hpfs_free_sectors(s, f, 1);
+ brelse(bh);
+ return;
+ }
+ while (btree->internal) {
+ nodes = btree->n_used_nodes + btree->n_free_nodes;
+ for (i = 0; i < btree->n_used_nodes; i++)
+ if (btree->u.internal[i].file_secno >= secs) goto f;
+ brelse(bh);
+ hpfs_error(s, "internal btree %08x doesn't end with -1", node);
+ return;
+ f:
+ for (j = i + 1; j < btree->n_used_nodes; j++)
+ hpfs_ea_remove(s, btree->u.internal[j].down, 1, 0);
+ btree->n_used_nodes = i + 1;
+ btree->n_free_nodes = nodes - btree->n_used_nodes;
+ btree->first_free = 8 + 8 * btree->n_used_nodes;
+ mark_buffer_dirty(bh);
+ if (btree->u.internal[i].file_secno == secs) {
+ brelse(bh);
+ return;
+ }
+ node = btree->u.internal[i].down;
+ brelse(bh);
+ if (hpfs_sb(s)->sb_chk)
+ if (hpfs_stop_cycles(s, node, &c1, &c2, "hpfs_truncate_btree"))
+ return;
+ if (!(anode = hpfs_map_anode(s, node, &bh))) return;
+ btree = &anode->btree;
+ }
+ nodes = btree->n_used_nodes + btree->n_free_nodes;
+ for (i = 0; i < btree->n_used_nodes; i++)
+ if (btree->u.external[i].file_secno + btree->u.external[i].length >= secs) goto ff;
+ brelse(bh);
+ return;
+ ff:
+ if (secs <= btree->u.external[i].file_secno) {
+ hpfs_error(s, "there is an allocation error in file %08x, sector %08x", f, secs);
+ if (i) i--;
+ }
+ else if (btree->u.external[i].file_secno + btree->u.external[i].length > secs) {
+ hpfs_free_sectors(s, btree->u.external[i].disk_secno + secs -
+ btree->u.external[i].file_secno, btree->u.external[i].length
+ - secs + btree->u.external[i].file_secno); /* I hope gcc optimizes this :-) */
+ btree->u.external[i].length = secs - btree->u.external[i].file_secno;
+ }
+ for (j = i + 1; j < btree->n_used_nodes; j++)
+ hpfs_free_sectors(s, btree->u.external[j].disk_secno, btree->u.external[j].length);
+ btree->n_used_nodes = i + 1;
+ btree->n_free_nodes = nodes - btree->n_used_nodes;
+ btree->first_free = 8 + 12 * btree->n_used_nodes;
+ mark_buffer_dirty(bh);
+ brelse(bh);
+}
+
+/* Remove file or directory and it's eas - note that directory must
+ be empty when this is called. */
+
+void hpfs_remove_fnode(struct super_block *s, fnode_secno fno)
+{
+ struct buffer_head *bh;
+ struct fnode *fnode;
+ struct extended_attribute *ea;
+ struct extended_attribute *ea_end;
+ if (!(fnode = hpfs_map_fnode(s, fno, &bh))) return;
+ if (!fnode->dirflag) hpfs_remove_btree(s, &fnode->btree);
+ else hpfs_remove_dtree(s, fnode->u.external[0].disk_secno);
+ ea_end = fnode_end_ea(fnode);
+ for (ea = fnode_ea(fnode); ea < ea_end; ea = next_ea(ea))
+ if (ea->indirect)
+ hpfs_ea_remove(s, ea_sec(ea), ea->anode, ea_len(ea));
+ hpfs_ea_ext_remove(s, fnode->ea_secno, fnode->ea_anode, fnode->ea_size_l);
+ brelse(bh);
+ hpfs_free_sectors(s, fno, 1);
+}
diff --git a/fs/hpfs/buffer.c b/fs/hpfs/buffer.c
new file mode 100644
index 00000000000..2807aa833e6
--- /dev/null
+++ b/fs/hpfs/buffer.c
@@ -0,0 +1,175 @@
+/*
+ * linux/fs/hpfs/buffer.c
+ *
+ * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
+ *
+ * general buffer i/o
+ */
+
+#include "hpfs_fn.h"
+
+void hpfs_lock_creation(struct super_block *s)
+{
+#ifdef DEBUG_LOCKS
+ printk("lock creation\n");
+#endif
+ down(&hpfs_sb(s)->hpfs_creation_de);
+}
+
+void hpfs_unlock_creation(struct super_block *s)
+{
+#ifdef DEBUG_LOCKS
+ printk("unlock creation\n");
+#endif
+ up(&hpfs_sb(s)->hpfs_creation_de);
+}
+
+/* Map a sector into a buffer and return pointers to it and to the buffer. */
+
+void *hpfs_map_sector(struct super_block *s, unsigned secno, struct buffer_head **bhp,
+ int ahead)
+{
+ struct buffer_head *bh;
+
+ cond_resched();
+
+ *bhp = bh = sb_bread(s, secno);
+ if (bh != NULL)
+ return bh->b_data;
+ else {
+ printk("HPFS: hpfs_map_sector: read error\n");
+ return NULL;
+ }
+}
+
+/* Like hpfs_map_sector but don't read anything */
+
+void *hpfs_get_sector(struct super_block *s, unsigned secno, struct buffer_head **bhp)
+{
+ struct buffer_head *bh;
+ /*return hpfs_map_sector(s, secno, bhp, 0);*/
+
+ cond_resched();
+
+ if ((*bhp = bh = sb_getblk(s, secno)) != NULL) {
+ if (!buffer_uptodate(bh)) wait_on_buffer(bh);
+ set_buffer_uptodate(bh);
+ return bh->b_data;
+ } else {
+ printk("HPFS: hpfs_get_sector: getblk failed\n");
+ return NULL;
+ }
+}
+
+/* Map 4 sectors into a 4buffer and return pointers to it and to the buffer. */
+
+void *hpfs_map_4sectors(struct super_block *s, unsigned secno, struct quad_buffer_head *qbh,
+ int ahead)
+{
+ struct buffer_head *bh;
+ char *data;
+
+ cond_resched();
+
+ if (secno & 3) {
+ printk("HPFS: hpfs_m