X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=ldiskfs%2Fkernel_patches%2Fpatches%2Fext3-fiemap-2.6.22-vanilla.patch;h=ce2649db9c35870948031e1ce33fe3c82e7e63e4;hp=5a94dcd6a5bb36249b82b346c067bfb1ee955637;hb=64a4664442e8060f95fde4f30b1fa7d65282be97;hpb=500e8a093a221ba5c2b1eb8b22c728c203bc9710 diff --git a/ldiskfs/kernel_patches/patches/ext3-fiemap-2.6.22-vanilla.patch b/ldiskfs/kernel_patches/patches/ext3-fiemap-2.6.22-vanilla.patch index 5a94dcd..ce2649d 100644 --- a/ldiskfs/kernel_patches/patches/ext3-fiemap-2.6.22-vanilla.patch +++ b/ldiskfs/kernel_patches/patches/ext3-fiemap-2.6.22-vanilla.patch @@ -1,45 +1,192 @@ -Index: linux-2.6.18/fs/ext3/ioctl.c +A large part of this code is from the generic VFS code in fs/ioctl.c in the +upstream kernel. + +Index: linux-2.6.22.14/fs/ext3/ioctl.c =================================================================== ---- linux-2.6.18.orig/fs/ext3/ioctl.c -+++ linux-2.6.18/fs/ext3/ioctl.c -@@ -15,6 +15,7 @@ +--- linux-2.6.22.14.orig/fs/ext3/ioctl.c ++++ linux-2.6.22.14/fs/ext3/ioctl.c +@@ -17,6 +17,159 @@ #include #include #include +#include "fiemap.h" ++ ++/* So that the fiemap access checks can't overflow on 32 bit machines. */ ++#define FIEMAP_MAX_EXTENTS (UINT_MAX / sizeof(struct fiemap_extent)) ++ ++/** ++ * fiemap_fill_next_extent - Fiemap helper function ++ * @fieinfo: Fiemap context passed into ->fiemap ++ * @logical: Extent logical start offset, in bytes ++ * @phys: Extent physical start offset, in bytes ++ * @len: Extent length, in bytes ++ * @flags: FIEMAP_EXTENT flags that describe this extent ++ * @lun: LUN on which this extent resides ++ * ++ * Called from file system ->fiemap callback. Will populate extent ++ * info as passed in via arguments and copy to user memory. On ++ * success, extent count on fieinfo is incremented. ++ * ++ * Returns 0 on success, -errno on error, 1 if this was the last ++ * extent that will fit in user array. ++ */ ++#define SET_UNKNOWN_FLAGS (FIEMAP_EXTENT_DELALLOC) ++#define SET_NO_DIRECT_FLAGS (FIEMAP_EXTENT_DATA_COMPRESSED \ ++ |FIEMAP_EXTENT_DATA_ENCRYPTED \ ++ |FIEMAP_EXTENT_NET) ++#define SET_NOT_ALIGNED_FLAGS (FIEMAP_EXTENT_DATA_TAIL|FIEMAP_EXTENT_DATA_INLINE) ++int fiemap_fill_next_extent(struct fiemap_extent_info *fieinfo, u64 logical, ++ u64 phys, u64 len, u32 flags, dev_t dev) ++{ ++ struct fiemap_extent extent = { 0 }; ++ struct fiemap_extent *dest = fieinfo->fi_extents_start; ++ ++ /* only count the extents */ ++ if (fieinfo->fi_extents_max == 0) { ++ fieinfo->fi_extents_mapped++; ++ return (flags & FIEMAP_EXTENT_LAST) ? 1 : 0; ++ } ++ ++ if (fieinfo->fi_extents_mapped >= fieinfo->fi_extents_max) ++ return 1; ++ ++ if (flags & SET_UNKNOWN_FLAGS) ++ flags |= FIEMAP_EXTENT_UNKNOWN; ++ if (flags & SET_NO_DIRECT_FLAGS) ++ flags |= FIEMAP_EXTENT_NO_DIRECT; ++ if (flags & SET_NOT_ALIGNED_FLAGS) ++ flags |= FIEMAP_EXTENT_NOT_ALIGNED; ++ ++ extent.fe_logical = logical; ++ extent.fe_physical = phys; ++ extent.fe_length = len; ++ extent.fe_flags = flags; ++ extent.fe_device = new_encode_dev(dev); ++ ++ dest += fieinfo->fi_extents_mapped; ++ if (copy_to_user(dest, &extent, sizeof(extent))) ++ return -EFAULT; ++ ++ fieinfo->fi_extents_mapped++; ++ if (fieinfo->fi_extents_mapped == fieinfo->fi_extents_max) ++ return 1; ++ ++ return (flags & FIEMAP_EXTENT_LAST) ? 1 : 0; ++} ++ ++static int fiemap_check_ranges(struct super_block *sb, ++ u64 start, u64 len, u64 *new_len) ++{ ++ *new_len = len; ++ ++ if (len == 0) ++ return -EINVAL; ++ ++ if (start > sb->s_maxbytes) ++ return -EFBIG; ++ ++ /* ++ * Shrink request scope to what the fs can actually handle. ++ */ ++ if ((len > sb->s_maxbytes) || ++ (sb->s_maxbytes - len) < start) ++ *new_len = sb->s_maxbytes - start; ++ ++ return 0; ++} ++ ++/* ++ * fiemap_check_flags - check validity of requested flags for fiemap ++ * @fieinfo: Fiemap context passed into ->fiemap ++ * @fs_flags: Set of fiemap flags that the file system understands ++ * ++ * Called from file system ->fiemap callback. This will compute the ++ * intersection of valid fiemap flags and those that the fs supports. That ++ * value is then compared against the user supplied flags. In case of bad user ++ * flags, the invalid values will be written into the fieinfo structure, and ++ * -EBADR is returned, which tells ioctl_fiemap() to return those values to ++ * userspace. For this reason, a return code of -EBADR should be preserved. ++ * ++ * Returns 0 on success, -EBADR on bad flags. ++*/ ++int fiemap_check_flags(struct fiemap_extent_info *fieinfo, u32 fs_flags) ++{ ++ u32 incompat_flags; ++ ++ incompat_flags = fieinfo->fi_flags & ~(FIEMAP_FLAGS_COMPAT & fs_flags); ++ if (incompat_flags) { ++ fieinfo->fi_flags = incompat_flags; ++ return -EBADR; ++ } ++ ++ return 0; ++} ++ ++int ioctl_fiemap(struct inode *inode, struct file *filp, unsigned long arg) ++{ ++ struct fiemap fiemap; ++ u64 len; ++ struct fiemap_extent_info fieinfo = {0, }; ++ struct super_block *sb = inode->i_sb; ++ int error = 0; ++ ++ if (copy_from_user(&fiemap, (struct fiemap __user *) arg, ++ sizeof(struct fiemap))) ++ return -EFAULT; ++ ++ if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS) ++ return -EINVAL; ++ ++ error = fiemap_check_ranges(sb, fiemap.fm_start, fiemap.fm_length, ++ &len); ++ if (error) ++ return error; ++ ++ fieinfo.fi_flags = fiemap.fm_flags; ++ fieinfo.fi_extents_max = fiemap.fm_extent_count; ++ fieinfo.fi_extents_start = (struct fiemap_extent *)(arg + sizeof(fiemap)); ++ ++ if (fiemap.fm_extent_count != 0 && ++ !access_ok(VERIFY_WRITE, (void *)arg, ++ offsetof(typeof(fiemap), fm_extents[fiemap.fm_extent_count]))) ++ return -EFAULT; ++ ++ if (fieinfo.fi_flags & FIEMAP_FLAG_SYNC) ++ filemap_write_and_wait(inode->i_mapping); ++ ++ error = ext3_fiemap(inode, &fieinfo, fiemap.fm_start, len); ++ fiemap.fm_flags = fieinfo.fi_flags; ++ fiemap.fm_mapped_extents = fieinfo.fi_extents_mapped; ++ if (copy_to_user((char *)arg, &fiemap, sizeof(fiemap))) ++ error = -EFAULT; ++ ++ return error; ++} int ext3_ioctl (struct inode * inode, struct file * filp, unsigned int cmd, unsigned long arg) -@@ -272,6 +272,9 @@ flags_err: +@@ -274,7 +427,9 @@ flags_err: return err; } +- + case EXT3_IOC_FIEMAP: { -+ return ext3_fiemap(inode, filp, cmd, arg); ++ return ioctl_fiemap(inode, filp, arg); + } - default: -Index: linux-2.6.18/include/linux/ext3_fs.h + return -ENOTTY; +Index: linux-2.6.22.14/include/linux/ext3_fs.h =================================================================== ---- linux-2.6.18.orig/include/linux/ext3_fs.h -+++ linux-2.6.18/include/linux/ext3_fs.h -@@ -249,7 +249,6 @@ struct ext3_new_group_data { - __u32 free_blocks_count; - }; - -- - /* - * ioctl commands - */ -@@ -257,15 +256,16 @@ struct ext3_new_group_data { +--- linux-2.6.22.14.orig/include/linux/ext3_fs.h ++++ linux-2.6.22.14/include/linux/ext3_fs.h +@@ -254,15 +254,16 @@ struct ext3_new_group_data { #define EXT3_IOC_SETFLAGS FS_IOC_SETFLAGS #define EXT3_IOC_GETVERSION _IOR('f', 3, long) #define EXT3_IOC_SETVERSION _IOW('f', 4, long) --#define EXT3_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long) -+#define EXT3_IOC_GETRSVSZ _IOR('f', 5, long) -+#define EXT3_IOC_SETRSVSZ _IOW('f', 6, long) -+#define EXT3_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long) ++#define EXT3_IOC_GETRSVSZ _IOR('f', 5, long) ++#define EXT3_IOC_SETRSVSZ _IOW('f', 6, long) + #define EXT3_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long) #define EXT3_IOC_GROUP_ADD _IOW('f', 8,struct ext3_new_group_input) +#define EXT3_IOC_FIEMAP _IOWR('f', 10, struct fiemap) #define EXT3_IOC_GETVERSION_OLD FS_IOC_GETVERSION @@ -52,20 +199,39 @@ Index: linux-2.6.18/include/linux/ext3_fs.h /* * ioctl commands in 32 bit emulation -@@ -1117,6 +1117,8 @@ ext3_get_blocks_wrap(handle_t *handle, s - bh->b_size = (ret << inode->i_blkbits); +@@ -281,6 +282,9 @@ struct ext3_new_group_data { + #define EXT3_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION + + ++/* FIEMAP flags supported by ext3 */ ++#define EXT3_FIEMAP_FLAGS_COMPAT (FIEMAP_FLAG_SYNC) ++ + /* + * Mount options + */ +@@ -1056,6 +1060,9 @@ extern int ext3_block_truncate_page(hand + extern int ext3_ioctl (struct inode *, struct file *, unsigned int, + unsigned long); + extern long ext3_compat_ioctl (struct file *, unsigned int, unsigned long); ++struct fiemap_extent_info; ++extern int ext3_fiemap(struct inode *, struct fiemap_extent_info *, __u64, ++ __u64); + + /* namei.c */ + extern int ext3_orphan_add(handle_t *, struct inode *); +@@ -1133,7 +1140,6 @@ ext3_get_blocks_wrap(handle_t *handle, s return ret; } -+extern int ext3_fiemap(struct inode *, struct file *, unsigned int, -+ unsigned long); - +- #endif /* __KERNEL__ */ -Index: linux-2.6.18/include/linux/ext3_extents.h + + /* EXT3_IOC_CREATE_INUM at bottom of file (visible to kernel and user). */ +Index: linux-2.6.22.14/include/linux/ext3_extents.h =================================================================== ---- linux-2.6.18.orig/include/linux/ext3_extents.h -+++ linux-2.6.18/include/linux/ext3_extents.h -@@ -142,8 +142,9 @@ struct ext3_ext_path { +--- linux-2.6.22.14.orig/include/linux/ext3_extents.h ++++ linux-2.6.22.14/include/linux/ext3_extents.h +@@ -142,8 +142,10 @@ struct ext3_ext_path { * callback must return valid extent (passed or newly created) */ typedef int (*ext_prepare_callback)(struct inode *, struct ext3_ext_path *, @@ -73,11 +239,12 @@ Index: linux-2.6.18/include/linux/ext3_extents.h - void *); + struct ext3_ext_cache *, + struct ext3_extent *, void *); ++ +#define HAVE_EXT_PREPARE_CB_EXTENT #define EXT_CONTINUE 0 #define EXT_BREAK 1 -@@ -152,6 +152,26 @@ typedef int (*ext_prepare_callback)(stru +@@ -152,6 +154,26 @@ typedef int (*ext_prepare_callback)(stru #define EXT_MAX_BLOCK 0xffffffff @@ -104,7 +271,7 @@ Index: linux-2.6.18/include/linux/ext3_extents.h #define EXT_FLAGS_CLR_UNKNOWN 0x7 /* Flags cleared on modification */ #define EXT_HDR_GEN_BITS 24 #define EXT_HDR_GEN_MASK ((1 << EXT_HDR_GEN_BITS) - 1) -@@ -219,6 +239,13 @@ ext3_ext_invalidate_cache(struct inode * +@@ -219,6 +241,12 @@ ext3_ext_invalidate_cache(struct inode * EXT3_I(inode)->i_cached_extent.ec_type = EXT3_EXT_CACHE_NO; } @@ -114,24 +281,22 @@ Index: linux-2.6.18/include/linux/ext3_extents.h + return (le16_to_cpu(ext->ee_len) > EXT_INIT_MAX_LEN); +} + -+ extern int ext3_ext_search_left(struct inode *, struct ext3_ext_path *, unsigned long *, unsigned long *); extern int ext3_ext_search_right(struct inode *, struct ext3_ext_path *, unsigned long *, unsigned long *); extern int ext3_extent_tree_init(handle_t *, struct inode *); -Index: linux-2.6.18/fs/ext3/extents.c +Index: linux-2.6.22.14/fs/ext3/extents.c =================================================================== ---- linux-2.6.18.orig/fs/ext3/extents.c -+++ linux-2.6.18/fs/ext3/extents.c -@@ -42,7 +42,7 @@ +--- linux-2.6.22.14.orig/fs/ext3/extents.c ++++ linux-2.6.22.14/fs/ext3/extents.c +@@ -41,6 +41,7 @@ + #include #include #include - #include -- +#include "fiemap.h" + #include - static handle_t *ext3_ext_journal_restart(handle_t *handle, int needed) - { -@@ -1477,7 +1477,7 @@ int ext3_ext_walk_space(struct inode *in + +@@ -1481,7 +1482,7 @@ int ext3_ext_walk_space(struct inode *in } BUG_ON(cbex.ec_len == 0); @@ -140,201 +305,196 @@ Index: linux-2.6.18/fs/ext3/extents.c ext3_ext_drop_refs(path); if (err < 0) -@@ -2289,6 +2289,143 @@ int ext3_ext_writepage_trans_blocks(stru +@@ -2296,6 +2297,103 @@ int ext3_ext_writepage_trans_blocks(stru return needed; } -+struct fiemap_internal { -+ struct fiemap *fiemap_s; -+ struct fiemap_extent fm_extent; -+ size_t tot_mapping_len; -+ char *cur_ext_ptr; -+ int current_extent; -+ int err; -+}; -+ +/* -+ * Callback function called for each extent to gather fiemap information. ++ * Callback function called for each extent to gather FIEMAP information. + */ +int ext3_ext_fiemap_cb(struct inode *inode, struct ext3_ext_path *path, + struct ext3_ext_cache *newex, struct ext3_extent *ex, + void *data) +{ -+ struct fiemap_internal *fiemap_i = data; -+ struct fiemap *fiemap_s = fiemap_i->fiemap_s; -+ struct fiemap_extent *fm_extent = &fiemap_i->fm_extent; -+ int current_extent = fiemap_i->current_extent; ++ struct fiemap_extent_info *fieinfo = data; + unsigned long blksize_bits = inode->i_sb->s_blocksize_bits; -+ -+ /* -+ * ext3_ext_walk_space returns a hole for extents that have not been -+ * allocated yet. -+ */ -+ if (((u64)(newex->ec_block + newex->ec_len) << blksize_bits >= -+ inode->i_size) && !ext3_ext_is_uninitialized(ex) && -+ newex->ec_type == EXT3_EXT_CACHE_GAP) -+ return EXT_BREAK; -+ -+ /* -+ * We only need to return number of extents. -+ */ -+ if (fiemap_s->fm_flags & FIEMAP_FLAG_NUM_EXTENTS) -+ goto count_extents; -+ -+ if (current_extent >= fiemap_s->fm_extent_count) -+ return EXT_BREAK; -+ -+ memset(fm_extent, 0, sizeof(*fm_extent)); -+ fm_extent->fe_offset = (__u64)newex->ec_start << blksize_bits; -+ fm_extent->fe_length = (__u64)newex->ec_len << blksize_bits; -+ fiemap_i->tot_mapping_len += fm_extent->fe_length; -+ -+ if (newex->ec_type == EXT3_EXT_CACHE_GAP) -+ fm_extent->fe_flags |= FIEMAP_EXTENT_HOLE; -+ -+ if (ext3_ext_is_uninitialized(ex)) -+ fm_extent->fe_flags |= (FIEMAP_EXTENT_DELALLOC | -+ FIEMAP_EXTENT_UNMAPPED); -+ -+ /* -+ * Mark this fiemap_extent as FIEMAP_EXTENT_EOF if it's past the end -+ * of file. -+ */ -+ if ((u64)(newex->ec_block + newex->ec_len) << blksize_bits >= -+ inode->i_size) -+ fm_extent->fe_flags |= FIEMAP_EXTENT_EOF; -+ -+ if (!copy_to_user(fiemap_i->cur_ext_ptr, fm_extent, -+ sizeof(struct fiemap_extent))) { -+ fiemap_i->cur_ext_ptr += sizeof(struct fiemap_extent); -+ } else { -+ fiemap_i->err = -EFAULT; -+ return EXT_BREAK; ++ __u64 logical; ++ __u64 physical; ++ __u64 length; ++ __u32 flags = 0; ++ int error; ++ ++ logical = (__u64)newex->ec_block << blksize_bits; ++ ++ if (newex->ec_type == EXT3_EXT_CACHE_GAP) { ++ pgoff_t offset; ++ struct page *page; ++ struct buffer_head *bh = NULL; ++ ++ offset = logical >> PAGE_SHIFT; ++ page = find_get_page(inode->i_mapping, offset); ++ if (!page || !page_has_buffers(page)) ++ return EXT_CONTINUE; ++ ++ bh = page_buffers(page); ++ ++ if (!bh) ++ return EXT_CONTINUE; ++ ++ if (buffer_delay(bh)) { ++ flags |= FIEMAP_EXTENT_DELALLOC; ++ page_cache_release(page); ++ } else { ++ page_cache_release(page); ++ return EXT_CONTINUE; ++ } + } + -+count_extents: -+ fiemap_i->current_extent++; ++ physical = (__u64)newex->ec_start << blksize_bits; ++ length = (__u64)newex->ec_len << blksize_bits; ++ ++ if (ex && ext3_ext_is_uninitialized(ex)) ++ flags |= FIEMAP_EXTENT_UNWRITTEN; + + /* -+ * Stop if we are beyond requested mapping size but return complete last -+ * extent. ++ * If this extent reaches EXT_MAX_BLOCK, it must be last. ++ * ++ * Or if ext3_ext_next_allocated_block is EXT_MAX_BLOCK, ++ * this indicates no more allocated blocks. ++ * ++ * XXX this might miss a single-block extent at EXT_MAX_BLOCK + */ -+ if ((u64)(newex->ec_block + newex->ec_len) << blksize_bits >= -+ fiemap_s->fm_length) ++ if (logical + length - 1 == EXT_MAX_BLOCK || ++ ext3_ext_next_allocated_block(path) == EXT_MAX_BLOCK) ++ flags |= FIEMAP_EXTENT_LAST; ++ ++ error = fiemap_fill_next_extent(fieinfo, logical, physical, ++ length, flags, inode->i_sb->s_dev); ++ if (error < 0) ++ return error; ++ if (error == 1) + return EXT_BREAK; + + return EXT_CONTINUE; +} + -+int ext3_fiemap(struct inode *inode, struct file *filp, unsigned int cmd, -+ unsigned long arg) ++int ext3_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, ++ __u64 start, __u64 len) +{ -+ struct fiemap *fiemap_s; -+ struct fiemap_internal fiemap_i; -+ struct fiemap_extent *last_extent; + ext3_fsblk_t start_blk; -+ int err = 0; ++ ext3_fsblk_t len_blks; ++ int error = 0; + + if (!(EXT3_I(inode)->i_flags & EXT3_EXTENTS_FL)) + return -EOPNOTSUPP; + -+ fiemap_s = kmalloc(sizeof(*fiemap_s), GFP_KERNEL); -+ if (fiemap_s == NULL) -+ return -ENOMEM; -+ if (copy_from_user(fiemap_s, (struct fiemap __user *)arg, -+ sizeof(*fiemap_s))) -+ return -EFAULT; -+ -+ if (fiemap_s->fm_flags & FIEMAP_FLAG_INCOMPAT) -+ return -EOPNOTSUPP; -+ -+ if (fiemap_s->fm_flags & FIEMAP_FLAG_SYNC) -+ ext3_sync_file(filp, filp->f_dentry, 1); ++ if (fiemap_check_flags(fieinfo, EXT3_FIEMAP_FLAGS_COMPAT)) ++ return -EBADR; + -+ start_blk = (fiemap_s->fm_start + inode->i_sb->s_blocksize - 1) >> -+ inode->i_sb->s_blocksize_bits; -+ fiemap_i.fiemap_s = fiemap_s; -+ fiemap_i.tot_mapping_len = 0; -+ fiemap_i.cur_ext_ptr = (char *)(arg + sizeof(*fiemap_s)); -+ fiemap_i.current_extent = 0; -+ fiemap_i.err = 0; ++ start_blk = start >> inode->i_sb->s_blocksize_bits; ++ len_blks = (len + inode->i_sb->s_blocksize) >> inode->i_sb->s_blocksize_bits; + + /* -+ * Walk the extent tree gathering extent information -+ */ ++ * Walk the extent tree gathering extent information. ++ * ext3_ext_fiemap_cb will push extents back to user. ++ */ + mutex_lock(&EXT3_I(inode)->truncate_mutex); -+ err = ext3_ext_walk_space(inode, start_blk , EXT_MAX_BLOCK - start_blk, -+ ext3_ext_fiemap_cb, &fiemap_i); ++ error = ext3_ext_walk_space(inode, start_blk, len_blks, ++ ext3_ext_fiemap_cb, fieinfo); + mutex_unlock(&EXT3_I(inode)->truncate_mutex); -+ if (err) -+ return err; -+ -+ fiemap_s->fm_extent_count = fiemap_i.current_extent; -+ fiemap_s->fm_length = fiemap_i.tot_mapping_len; -+ if (fiemap_i.current_extent != 0 && -+ !(fiemap_s->fm_flags & FIEMAP_FLAG_NUM_EXTENTS)) { -+ last_extent = &fiemap_i.fm_extent; -+ last_extent->fe_flags |= FIEMAP_EXTENT_LAST; -+ } -+ err = copy_to_user((void *)arg, fiemap_s, sizeof(*fiemap_s)); + -+ return err; ++ return error; +} + EXPORT_SYMBOL(ext3_mark_inode_dirty); EXPORT_SYMBOL(ext3_ext_invalidate_cache); EXPORT_SYMBOL(ext3_ext_insert_extent); -Index: linux-2.6.18/fs/ext3/fiemap.h +Index: linux-2.6.22.14/fs/ext3/fiemap.h =================================================================== --- /dev/null -+++ linux-2.6.18/fs/ext3/fiemap.h -@@ -0,0 +1,49 @@ ++++ linux-2.6.22.14/fs/ext3/fiemap.h +@@ -0,0 +1,84 @@ +/* -+ * linux/fs/ext3/fiemap.h ++ * FIEMAP ioctl infrastructure. + * -+ * Copyright 2008 Sun Microsystems, Inc. ++ * Copyright (C) 2007 Cluster File Systems, Inc + * -+ * Author: Kalpak Shah ++ * Author: Kalpak Shah ++ * Andreas Dilger + */ + +#ifndef _LINUX_EXT3_FIEMAP_H +#define _LINUX_EXT3_FIEMAP_H + +struct fiemap_extent { -+ __u64 fe_offset; /* offset in bytes for the start of the extent */ -+ __u64 fe_length; /* length in bytes for the extent */ -+ __u32 fe_flags; /* returned FIEMAP_EXTENT_* flags for the extent */ -+ __u32 fe_lun; /* logical device number for extent (starting at 0)*/ ++ __u64 fe_logical; /* logical offset in bytes for the start of ++ * the extent from the beginning of the file */ ++ __u64 fe_physical; /* physical offset in bytes for the start ++ * of the extent from the beginning of the disk */ ++ __u64 fe_length; /* length in bytes for this extent */ ++ __u32 fe_flags; /* FIEMAP_EXTENT_* flags for this extent */ ++ __u32 fe_device; /* device number for this extent */ ++}; ++ ++struct fiemap { ++ __u64 fm_start; /* logical offset (inclusive) at ++ * which to start mapping (in) */ ++ __u64 fm_length; /* logical length of mapping which ++ * userspace wants (in) */ ++ __u32 fm_flags; /* FIEMAP_FLAG_* flags for request (in/out) */ ++ __u32 fm_mapped_extents;/* number of extents that were mapped (out) */ ++ __u32 fm_extent_count; /* size of fm_extents array (in) */ ++ __u32 fm_reserved; ++ struct fiemap_extent fm_extents[0]; /* array of mapped extents (out) */ +}; + +/* -+ * fiemap is not ext3-specific and should be moved into fs.h eventually. ++ * FIEMAP helper definition. + */ -+ -+struct fiemap { -+ __u64 fm_start; /* logical starting byte offset (in/out) */ -+ __u64 fm_length; /* logical length of map (in/out) */ -+ __u32 fm_flags; /* FIEMAP_FLAG_* flags for request (in/out) */ -+ __u32 fm_extent_count; /* number of extents in fm_extents (in/out) */ -+ __u64 fm_unused; -+ struct fiemap_extent fm_extents[0]; ++struct fiemap_extent_info { ++ unsigned int fi_flags; /* Flags as passed from user */ ++ unsigned int fi_extents_mapped; /* Number of mapped extents */ ++ unsigned int fi_extents_max; /* Size of fiemap_extent array*/ ++ struct fiemap_extent *fi_extents_start; /* Start of fiemap_extent array */ +}; + ++int fiemap_check_flags(struct fiemap_extent_info *fieinfo, u32 fs_flags); ++int fiemap_fill_next_extent(struct fiemap_extent_info *info, u64 logical, ++ u64 phys, u64 len, u32 flags, u32 lun); ++ ++#define FIEMAP_MAX_OFFSET (~0ULL) ++ +#define FIEMAP_FLAG_SYNC 0x00000001 /* sync file data before map */ -+#define FIEMAP_FLAG_HSM_READ 0x00000002 /* get data from HSM before map */ -+#define FIEMAP_FLAG_NUM_EXTENTS 0x00000004 /* return only number of extents */ -+#define FIEMAP_FLAG_INCOMPAT 0xff000000 /* error for unknown flags in here */ -+ -+#define FIEMAP_EXTENT_HOLE 0x00000001 /* has no data or space allocation */ -+#define FIEMAP_EXTENT_UNWRITTEN 0x00000002 /* space allocated, but no data */ -+#define FIEMAP_EXTENT_UNMAPPED 0x00000004 /* has data but no space allocation*/ -+#define FIEMAP_EXTENT_ERROR 0x00000008 /* mapping error, errno in fe_start*/ -+#define FIEMAP_EXTENT_NO_DIRECT 0x00000010 /* cannot access data directly */ -+#define FIEMAP_EXTENT_LAST 0x00000020 /* last extent in the file */ -+#define FIEMAP_EXTENT_DELALLOC 0x00000040 /* has data but not yet written, -+ * must have EXTENT_UNKNOWN set */ -+#define FIEMAP_EXTENT_SECONDARY 0x00000080 /* data (also) in secondary storage, -+ * not in primary if EXTENT_UNKNOWN*/ -+#define FIEMAP_EXTENT_EOF 0x00000100 /* if fm_start+fm_len is beyond EOF*/ ++#define FIEMAP_FLAG_XATTR 0x00000002 /* map extended attribute tree */ ++ ++/* ldiskfs only supports FLAG_SYNC flag currently */ ++#define FIEMAP_FLAGS_COMPAT (FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR) ++ ++ ++#define FIEMAP_EXTENT_LAST 0x00000001 /* Last extent in file. */ ++#define FIEMAP_EXTENT_UNKNOWN 0x00000002 /* Data location unknown. */ ++#define FIEMAP_EXTENT_DELALLOC 0x00000004 /* Location still pending. ++ * Sets EXTENT_UNKNOWN. */ ++#define FIEMAP_EXTENT_NO_DIRECT 0x00000008 /* Data mapping undefined */ ++#define FIEMAP_EXTENT_SECONDARY 0x00000010 /* Data copied offline. May ++ * set EXTENT_NO_DIRECT. */ ++#define FIEMAP_EXTENT_NET 0x00000020 /* Data stored remotely. ++ * Sets EXTENT_NO_DIRECT. */ ++#define FIEMAP_EXTENT_DATA_COMPRESSED 0x00000040 /* Data is compressed by fs. ++ * Sets EXTENT_NO_DIRECT. */ ++#define FIEMAP_EXTENT_DATA_ENCRYPTED 0x00000080 /* Data is encrypted by fs. ++ * Sets EXTENT_NO_DIRECT. */ ++#define FIEMAP_EXTENT_NOT_ALIGNED 0x00000100 /* Extent offsets may not be ++ * block aligned. */ ++#define FIEMAP_EXTENT_DATA_INLINE 0x00000200 /* Data mixed with metadata. ++ * Sets EXTENT_NOT_ALIGNED.*/ ++#define FIEMAP_EXTENT_DATA_TAIL 0x00000400 /* Multiple files in block. ++ * Sets EXTENT_NOT_ALIGNED.*/ ++#define FIEMAP_EXTENT_UNWRITTEN 0x00000800 /* Space allocated, but ++ * no data (i.e. zero). */ ++#define FIEMAP_EXTENT_MERGED 0x00001000 /* File does not natively ++ * support extents. Result ++ * merged for efficiency. */ + +#endif /* _LINUX_EXT3_FIEMAP_H */ ++