From: Jan Kara <jack@xxxxxxx>
[ Upstream commit f2844803404d9729f893e279ddea12678710e7fb ]
Implement function udf_fiiter_add_entry() adding new directory entries
using new directory iteration code.
Signed-off-by: Jan Kara <jack@xxxxxxx>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@xxxxxxxxxx>
---
fs/udf/directory.c | 57 +++++++++++++++++++++++
fs/udf/namei.c | 110 +++++++++++++++++++++++++++++++++++++++++++++
fs/udf/udfdecl.h | 2 +
3 files changed, 169 insertions(+)
diff --git a/fs/udf/directory.c b/fs/udf/directory.c
index 2842c463725c..be85d1b2a6cf 100644
--- a/fs/udf/directory.c
+++ b/fs/udf/directory.c
@@ -413,6 +413,63 @@ void udf_fiiter_write_fi(struct udf_fileident_iter *iter, uint8_t *impuse)
inode_inc_iversion(iter->dir);
}
+void udf_fiiter_update_elen(struct udf_fileident_iter *iter, uint32_t new_elen)
+{
+ struct udf_inode_info *iinfo = UDF_I(iter->dir);
+ int diff = new_elen - iter->elen;
+
+ /* Skip update when we already went past the last extent */
+ if (!iter->elen)
+ return;
+ iter->elen = new_elen;
+ if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
+ iter->epos.offset -= sizeof(struct short_ad);
+ else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
+ iter->epos.offset -= sizeof(struct long_ad);
+ udf_write_aext(iter->dir, &iter->epos, &iter->eloc, iter->elen, 1);
+ iinfo->i_lenExtents += diff;
+ mark_inode_dirty(iter->dir);
+}
+
+/* Append new block to directory. @iter is expected to point at EOF */
+int udf_fiiter_append_blk(struct udf_fileident_iter *iter)
+{
+ struct udf_inode_info *iinfo = UDF_I(iter->dir);
+ int blksize = 1 << iter->dir->i_blkbits;
+ struct buffer_head *bh;
+ sector_t block;
+ uint32_t old_elen = iter->elen;
+ int err;
+
+ if (WARN_ON_ONCE(iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB))
+ return -EINVAL;
+
+ /* Round up last extent in the file */
+ udf_fiiter_update_elen(iter, ALIGN(iter->elen, blksize));
+
+ /* Allocate new block and refresh mapping information */
+ block = iinfo->i_lenExtents >> iter->dir->i_blkbits;
+ bh = udf_bread(iter->dir, block, 1, &err);
+ if (!bh) {
+ udf_fiiter_update_elen(iter, old_elen);
+ return err;
+ }
+ if (inode_bmap(iter->dir, block, &iter->epos, &iter->eloc, &iter->elen,
+ &iter->loffset) != (EXT_RECORDED_ALLOCATED >> 30)) {
+ udf_err(iter->dir->i_sb,
+ "block %llu not allocated in directory (ino %lu)\n",
+ (unsigned long long)block, iter->dir->i_ino);
+ return -EFSCORRUPTED;
+ }
+ if (!(iter->pos & (blksize - 1))) {
+ brelse(iter->bh[0]);
+ iter->bh[0] = bh;
+ } else {
+ iter->bh[1] = bh;
+ }
+ return 0;
+}
+
struct fileIdentDesc *udf_fileident_read(struct inode *dir, loff_t *nf_pos,
struct udf_fileident_bh *fibh,
struct fileIdentDesc *cfi,
diff --git a/fs/udf/namei.c b/fs/udf/namei.c
index 39508a2e25c9..bdf237dee120 100644
--- a/fs/udf/namei.c
+++ b/fs/udf/namei.c
@@ -472,6 +472,116 @@ static struct buffer_head *udf_expand_dir_adinicb(struct inode *inode,
return dbh;
}
+static int udf_fiiter_add_entry(struct inode *dir, struct dentry *dentry,
+ struct udf_fileident_iter *iter)
+{
+ struct udf_inode_info *dinfo = UDF_I(dir);
+ int nfidlen, namelen = 0;
+ int ret;
+ int off, blksize = 1 << dir->i_blkbits;
+ udf_pblk_t block;
+ char name[UDF_NAME_LEN_CS0];
+
+ if (dentry) {
+ if (!dentry->d_name.len)
+ return -EINVAL;
+ namelen = udf_put_filename(dir->i_sb, dentry->d_name.name,
+ dentry->d_name.len,
+ name, UDF_NAME_LEN_CS0);
+ if (!namelen)
+ return -ENAMETOOLONG;
+ }
+ nfidlen = ALIGN(sizeof(struct fileIdentDesc) + namelen, UDF_NAME_PAD);
+
+ for (ret = udf_fiiter_init(iter, dir, 0);
+ !ret && iter->pos < dir->i_size;
+ ret = udf_fiiter_advance(iter)) {
+ if (iter->fi.fileCharacteristics & FID_FILE_CHAR_DELETED) {
+ if (udf_dir_entry_len(&iter->fi) == nfidlen) {
+ iter->fi.descTag.tagSerialNum = cpu_to_le16(1);
+ iter->fi.fileVersionNum = cpu_to_le16(1);
+ iter->fi.fileCharacteristics = 0;
+ iter->fi.lengthFileIdent = namelen;
+ iter->fi.lengthOfImpUse = cpu_to_le16(0);
+ memcpy(iter->namebuf, name, namelen);
+ iter->name = iter->namebuf;
+ return 0;
+ }
+ }
+ }
+ if (ret) {
+ udf_fiiter_release(iter);
+ return ret;
+ }
+ if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB &&
+ blksize - udf_ext0_offset(dir) - iter->pos < nfidlen) {
+ struct buffer_head *retbh;
+
+ udf_fiiter_release(iter);
+ /*
+ * FIXME: udf_expand_dir_adinicb does not need to return bh
+ * once other users are gone
+ */
+ retbh = udf_expand_dir_adinicb(dir, &block, &ret);
+ if (!retbh)
+ return ret;
+ brelse(retbh);
+ ret = udf_fiiter_init(iter, dir, dir->i_size);
+ if (ret < 0)
+ return ret;
+ }
+
+ /* Get blocknumber to use for entry tag */
+ if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
+ block = dinfo->i_location.logicalBlockNum;
+ } else {
+ block = iter->eloc.logicalBlockNum +
+ ((iter->elen - 1) >> dir->i_blkbits);
+ }
+ off = iter->pos & (blksize - 1);
+ if (!off)
+ off = blksize;
+ /* Entry fits into current block? */
+ if (blksize - udf_ext0_offset(dir) - off >= nfidlen)
+ goto store_fi;
+
+ ret = udf_fiiter_append_blk(iter);
+ if (ret) {
+ udf_fiiter_release(iter);
+ return ret;
+ }
+
+ /* Entry will be completely in the new block? Update tag location... */
+ if (!(iter->pos & (blksize - 1)))
+ block = iter->eloc.logicalBlockNum +
+ ((iter->elen - 1) >> dir->i_blkbits);
+store_fi:
+ memset(&iter->fi, 0, sizeof(struct fileIdentDesc));
+ if (UDF_SB(dir->i_sb)->s_udfrev >= 0x0200)
+ udf_new_tag((char *)(&iter->fi), TAG_IDENT_FID, 3, 1, block,
+ sizeof(struct tag));
+ else
+ udf_new_tag((char *)(&iter->fi), TAG_IDENT_FID, 2, 1, block,
+ sizeof(struct tag));
+ iter->fi.fileVersionNum = cpu_to_le16(1);
+ iter->fi.lengthFileIdent = namelen;
+ iter->fi.lengthOfImpUse = cpu_to_le16(0);
+ memcpy(iter->namebuf, name, namelen);
+ iter->name = iter->namebuf;
+
+ dir->i_size += nfidlen;
+ if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
+ dinfo->i_lenAlloc += nfidlen;
+ } else {
+ /* Truncate last extent to proper size */
+ udf_fiiter_update_elen(iter, iter->elen -
+ (dinfo->i_lenExtents - dir->i_size));
+ }
+ mark_inode_dirty(dir);
+
+ return 0;
+}
+
static struct fileIdentDesc *udf_add_entry(struct inode *dir,
struct dentry *dentry,
struct udf_fileident_bh *fibh,
diff --git a/fs/udf/udfdecl.h b/fs/udf/udfdecl.h
index 676fa2996ffe..e47b2f0c3e05 100644
--- a/fs/udf/udfdecl.h
+++ b/fs/udf/udfdecl.h
@@ -264,6 +264,8 @@ int udf_fiiter_init(struct udf_fileident_iter *iter, struct inode *dir,
int udf_fiiter_advance(struct udf_fileident_iter *iter);
void udf_fiiter_release(struct udf_fileident_iter *iter);
void udf_fiiter_write_fi(struct udf_fileident_iter *iter, uint8_t *impuse);
+void udf_fiiter_update_elen(struct udf_fileident_iter *iter, uint32_t new_elen);
+int udf_fiiter_append_blk(struct udf_fileident_iter *iter);
extern struct fileIdentDesc *udf_fileident_read(struct inode *, loff_t *,
struct udf_fileident_bh *,
struct fileIdentDesc *,
--
2.34.1
