diff options
| -rw-r--r-- | fs/erofs/data.c | 15 | ||||
| -rw-r--r-- | fs/erofs/inode.c | 1 | ||||
| -rw-r--r-- | fs/erofs/internal.h | 5 | ||||
| -rw-r--r-- | fs/erofs/namei.c | 1 | ||||
| -rw-r--r-- | fs/erofs/zmap.c | 38 |
5 files changed, 59 insertions, 1 deletions
diff --git a/fs/erofs/data.c b/fs/erofs/data.c index b2a22aabc9bc..09c46fbdb9b2 100644 --- a/fs/erofs/data.c +++ b/fs/erofs/data.c @@ -5,7 +5,6 @@ */ #include "internal.h" #include <linux/prefetch.h> -#include <linux/iomap.h> #include <linux/dax.h> #include <trace/events/erofs.h> @@ -152,6 +151,20 @@ static const struct iomap_ops erofs_iomap_ops = { .iomap_end = erofs_iomap_end, }; +int erofs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, + u64 start, u64 len) +{ + if (erofs_inode_is_data_compressed(EROFS_I(inode)->datalayout)) { +#ifdef CONFIG_EROFS_FS_ZIP + return iomap_fiemap(inode, fieinfo, start, len, + &z_erofs_iomap_report_ops); +#else + return -EOPNOTSUPP; +#endif + } + return iomap_fiemap(inode, fieinfo, start, len, &erofs_iomap_ops); +} + /* * since we dont have write or truncate flows, so no inode * locking needs to be held at the moment. diff --git a/fs/erofs/inode.c b/fs/erofs/inode.c index 92728da1d206..d13e0709599c 100644 --- a/fs/erofs/inode.c +++ b/fs/erofs/inode.c @@ -365,6 +365,7 @@ const struct inode_operations erofs_generic_iops = { .getattr = erofs_getattr, .listxattr = erofs_listxattr, .get_acl = erofs_get_acl, + .fiemap = erofs_fiemap, }; const struct inode_operations erofs_symlink_iops = { diff --git a/fs/erofs/internal.h b/fs/erofs/internal.h index a9fc5245015b..91089ab8a816 100644 --- a/fs/erofs/internal.h +++ b/fs/erofs/internal.h @@ -15,6 +15,7 @@ #include <linux/magic.h> #include <linux/slab.h> #include <linux/vmalloc.h> +#include <linux/iomap.h> #include "erofs_fs.h" /* redefine pr_fmt "erofs: " */ @@ -363,6 +364,8 @@ struct erofs_map_blocks { #define EROFS_GET_BLOCKS_FIEMAP 0x0002 /* zmap.c */ +extern const struct iomap_ops z_erofs_iomap_report_ops; + #ifdef CONFIG_EROFS_FS_ZIP int z_erofs_fill_inode(struct inode *inode); int z_erofs_map_blocks_iter(struct inode *inode, @@ -381,6 +384,8 @@ static inline int z_erofs_map_blocks_iter(struct inode *inode, /* data.c */ extern const struct file_operations erofs_file_fops; struct page *erofs_get_meta_page(struct super_block *sb, erofs_blk_t blkaddr); +int erofs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, + u64 start, u64 len); /* inode.c */ static inline unsigned long erofs_inode_hash(erofs_nid_t nid) diff --git a/fs/erofs/namei.c b/fs/erofs/namei.c index a8271ce5e13f..8629e616028c 100644 --- a/fs/erofs/namei.c +++ b/fs/erofs/namei.c @@ -245,4 +245,5 @@ const struct inode_operations erofs_dir_iops = { .getattr = erofs_getattr, .listxattr = erofs_listxattr, .get_acl = erofs_get_acl, + .fiemap = erofs_fiemap, }; diff --git a/fs/erofs/zmap.c b/fs/erofs/zmap.c index c2a31810abeb..9fb98d85a3ce 100644 --- a/fs/erofs/zmap.c +++ b/fs/erofs/zmap.c @@ -675,3 +675,41 @@ out: DBG_BUGON(err < 0 && err != -ENOMEM); return err; } + +static int z_erofs_iomap_begin_report(struct inode *inode, loff_t offset, + loff_t length, unsigned int flags, + struct iomap *iomap, struct iomap *srcmap) +{ + int ret; + struct erofs_map_blocks map = { .m_la = offset }; + + ret = z_erofs_map_blocks_iter(inode, &map, EROFS_GET_BLOCKS_FIEMAP); + if (map.mpage) + put_page(map.mpage); + if (ret < 0) + return ret; + + iomap->bdev = inode->i_sb->s_bdev; + iomap->offset = map.m_la; + iomap->length = map.m_llen; + if (map.m_flags & EROFS_MAP_MAPPED) { + iomap->type = IOMAP_MAPPED; + iomap->addr = map.m_pa; + } else { + iomap->type = IOMAP_HOLE; + iomap->addr = IOMAP_NULL_ADDR; + /* + * No strict rule how to describe extents for post EOF, yet + * we need do like below. Otherwise, iomap itself will get + * into an endless loop on post EOF. + */ + if (iomap->offset >= inode->i_size) + iomap->length = length + map.m_la - offset; + } + iomap->flags = 0; + return 0; +} + +const struct iomap_ops z_erofs_iomap_report_ops = { + .iomap_begin = z_erofs_iomap_begin_report, +}; |