diff options
Diffstat (limited to 'fs/gfs2')
| -rw-r--r-- | fs/gfs2/ops_inode.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c index d232991b9046..1e24b65e1d23 100644 --- a/fs/gfs2/ops_inode.c +++ b/fs/gfs2/ops_inode.c @@ -19,6 +19,7 @@ #include <linux/gfs2_ondisk.h> #include <linux/crc32.h> #include <linux/lm_interface.h> +#include <linux/fiemap.h> #include <asm/uaccess.h> #include "gfs2.h" @@ -1212,6 +1213,48 @@ static int gfs2_removexattr(struct dentry *dentry, const char *name) return gfs2_ea_remove(GFS2_I(dentry->d_inode), &er); } +static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, + u64 start, u64 len) +{ + struct gfs2_inode *ip = GFS2_I(inode); + struct gfs2_holder gh; + int ret; + + ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); + if (ret) + return ret; + + mutex_lock(&inode->i_mutex); + + ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); + if (ret) + goto out; + + if (gfs2_is_stuffed(ip)) { + u64 phys = ip->i_no_addr << inode->i_blkbits; + u64 size = i_size_read(inode); + u32 flags = FIEMAP_EXTENT_LAST|FIEMAP_EXTENT_NOT_ALIGNED| + FIEMAP_EXTENT_DATA_INLINE; + phys += sizeof(struct gfs2_dinode); + phys += start; + if (start + len > size) + len = size - start; + if (start < size) + ret = fiemap_fill_next_extent(fieinfo, start, phys, + len, flags); + if (ret == 1) + ret = 0; + } else { + ret = __generic_block_fiemap(inode, fieinfo, start, len, + gfs2_block_map); + } + + gfs2_glock_dq_uninit(&gh); +out: + mutex_unlock(&inode->i_mutex); + return ret; +} + const struct inode_operations gfs2_file_iops = { .permission = gfs2_permission, .setattr = gfs2_setattr, @@ -1220,6 +1263,7 @@ const struct inode_operations gfs2_file_iops = { .getxattr = gfs2_getxattr, .listxattr = gfs2_listxattr, .removexattr = gfs2_removexattr, + .fiemap = gfs2_fiemap, }; const struct inode_operations gfs2_dir_iops = { @@ -1239,6 +1283,7 @@ const struct inode_operations gfs2_dir_iops = { .getxattr = gfs2_getxattr, .listxattr = gfs2_listxattr, .removexattr = gfs2_removexattr, + .fiemap = gfs2_fiemap, }; const struct inode_operations gfs2_symlink_iops = { @@ -1251,5 +1296,6 @@ const struct inode_operations gfs2_symlink_iops = { .getxattr = gfs2_getxattr, .listxattr = gfs2_listxattr, .removexattr = gfs2_removexattr, + .fiemap = gfs2_fiemap, }; |