From 3080a74ea39eece6ac21aae768c48ab8b1f89ac1 Mon Sep 17 00:00:00 2001 From: Namjae Jeon Date: Sun, 23 Oct 2011 19:28:32 +0900 Subject: [PATCH] udf: Skip mirror metadata FE loading when metadata FE is ok It is not necessary to load mirror metadata FE when metadata FE is OK. So try to read it only the first time udf_get_pblock_meta25() fails to map the block from metadata FE. Signed-off-by: Ashish Sangwan Signed-off-by: Namjae Jeon Signed-off-by: Jan Kara --- fs/udf/partition.c | 8 ++++++- fs/udf/super.c | 68 ++++++++++++++++++++++++++---------------------------- fs/udf/udf_sb.h | 1 + fs/udf/udfdecl.h | 2 ++ 4 files changed, 43 insertions(+), 36 deletions(-) diff --git a/fs/udf/partition.c b/fs/udf/partition.c index f3e472c..b526f25 100644 --- a/fs/udf/partition.c +++ b/fs/udf/partition.c @@ -321,8 +321,14 @@ uint32_t udf_get_pblock_meta25(struct super_block *sb, uint32_t block, /* We shouldn't mount such media... */ BUG_ON(!inode); retblk = udf_try_read_meta(inode, block, partition, offset); - if (retblk == 0xFFFFFFFF) { + if (retblk == 0xFFFFFFFF && mdata->s_metadata_fe) { udf_warn(sb, "error reading from METADATA, trying to read from MIRROR\n"); + if (!mdata->s_mirror_loaded_flag) { + mdata->s_mirror_fe = udf_find_metadata_inode_efe(sb, + mdata->s_mirror_file_loc, map->s_partition_num); + mdata->s_mirror_loaded_flag = 1; + } + inode = mdata->s_mirror_fe; if (!inode) return 0xFFFFFFFF; diff --git a/fs/udf/super.c b/fs/udf/super.c index e58123a..dfe043a 100644 --- a/fs/udf/super.c +++ b/fs/udf/super.c @@ -826,59 +826,57 @@ out1: return ret; } +struct inode *udf_find_metadata_inode_efe(struct super_block *sb, + u32 meta_file_loc, u32 partition_num) +{ + struct kernel_lb_addr addr; + struct inode *metadata_fe; + + addr.logicalBlockNum = meta_file_loc; + addr.partitionReferenceNum = partition_num; + + metadata_fe = udf_iget(sb, &addr); + + if (metadata_fe == NULL) + udf_warn(sb, "metadata inode efe not found\n"); + else if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) { + udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n"); + iput(metadata_fe); + metadata_fe = NULL; + } + + return metadata_fe; +} + static int udf_load_metadata_files(struct super_block *sb, int partition) { struct udf_sb_info *sbi = UDF_SB(sb); struct udf_part_map *map; struct udf_meta_data *mdata; struct kernel_lb_addr addr; - int fe_error = 0; map = &sbi->s_partmaps[partition]; mdata = &map->s_type_specific.s_metadata; /* metadata address */ - addr.logicalBlockNum = mdata->s_meta_file_loc; - addr.partitionReferenceNum = map->s_partition_num; - udf_debug("Metadata file location: block = %d part = %d\n", - addr.logicalBlockNum, addr.partitionReferenceNum); + mdata->s_meta_file_loc, map->s_partition_num); - mdata->s_metadata_fe = udf_iget(sb, &addr); + mdata->s_metadata_fe = udf_find_metadata_inode_efe(sb, + mdata->s_meta_file_loc, map->s_partition_num); if (mdata->s_metadata_fe == NULL) { - udf_warn(sb, "metadata inode efe not found, will try mirror inode\n"); - fe_error = 1; - } else if (UDF_I(mdata->s_metadata_fe)->i_alloc_type != - ICBTAG_FLAG_AD_SHORT) { - udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n"); - fe_error = 1; - iput(mdata->s_metadata_fe); - mdata->s_metadata_fe = NULL; - } - - /* mirror file entry */ - addr.logicalBlockNum = mdata->s_mirror_file_loc; - addr.partitionReferenceNum = map->s_partition_num; + /* mirror file entry */ + udf_debug("Mirror metadata file location: block = %d part = %d\n", + mdata->s_mirror_file_loc, map->s_partition_num); - udf_debug("Mirror metadata file location: block = %d part = %d\n", - addr.logicalBlockNum, addr.partitionReferenceNum); + mdata->s_mirror_fe = udf_find_metadata_inode_efe(sb, + mdata->s_mirror_file_loc, map->s_partition_num); - mdata->s_mirror_fe = udf_iget(sb, &addr); - - if (mdata->s_mirror_fe == NULL) { - if (fe_error) { - udf_err(sb, "mirror inode efe not found and metadata inode is missing too, exiting...\n"); - goto error_exit; - } else - udf_warn(sb, "mirror inode efe not found, but metadata inode is OK\n"); - } else if (UDF_I(mdata->s_mirror_fe)->i_alloc_type != - ICBTAG_FLAG_AD_SHORT) { - udf_warn(sb, "mirror inode efe does not have short allocation descriptors!\n"); - iput(mdata->s_mirror_fe); - mdata->s_mirror_fe = NULL; - if (fe_error) + if (mdata->s_mirror_fe == NULL) { + udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n"); goto error_exit; + } } /* diff --git a/fs/udf/udf_sb.h b/fs/udf/udf_sb.h index 4858c19..a3146b0 100644 --- a/fs/udf/udf_sb.h +++ b/fs/udf/udf_sb.h @@ -61,6 +61,7 @@ struct udf_meta_data { __u32 s_alloc_unit_size; __u16 s_align_unit_size; __u8 s_dup_md_flag; + __u8 s_mirror_loaded_flag; struct inode *s_metadata_fe; struct inode *s_mirror_fe; struct inode *s_bitmap_fe; diff --git a/fs/udf/udfdecl.h b/fs/udf/udfdecl.h index f3d44986..79aae3f 100644 --- a/fs/udf/udfdecl.h +++ b/fs/udf/udfdecl.h @@ -135,6 +135,8 @@ static inline void udf_updated_lvid(struct super_block *sb) UDF_SB(sb)->s_lvid_dirty = 1; } extern u64 lvid_get_unique_id(struct super_block *sb); +struct inode *udf_find_metadata_inode_efe(struct super_block *sb, + u32 meta_file_loc, u32 partition_num); /* namei.c */ extern int udf_write_fi(struct inode *inode, struct fileIdentDesc *, -- 2.7.4