From 5c9bac599ca51c2d5a5d9526e894a0033185657b Mon Sep 17 00:00:00 2001 From: Rahul Deshmukh Date: Mon, 18 Jan 2010 22:48:01 +0100 Subject: [PATCH] b=19742 fix fiemap patches for rhel5 i=girish i=andreas --- .../patches/ext3-fiemap-2.6-rhel5.patch | 420 +-------------------- .../patches/ext4-fiemap-2.6-rhel5.patch | 246 +----------- 2 files changed, 30 insertions(+), 636 deletions(-) diff --git a/ldiskfs/kernel_patches/patches/ext3-fiemap-2.6-rhel5.patch b/ldiskfs/kernel_patches/patches/ext3-fiemap-2.6-rhel5.patch index 49e8f8f..f76beb6 100644 --- a/ldiskfs/kernel_patches/patches/ext3-fiemap-2.6-rhel5.patch +++ b/ldiskfs/kernel_patches/patches/ext3-fiemap-2.6-rhel5.patch @@ -1,81 +1,13 @@ -A large part of this code is from the generic VFS code in fs/ioctl.c in the -upstream kernel. - -Index: linux-2.6.18-128.1.6/fs/ext3/ioctl.c -=================================================================== ---- linux-2.6.18-128.1.6.orig/fs/ext3/ioctl.c -+++ linux-2.6.18-128.1.6/fs/ext3/ioctl.c -@@ -15,7 +15,161 @@ - #include +diff -rupN linux-2.6.18-164.6.1_1/fs/ext3/ioctl.c linux-2.6.18-164.6.1_2/fs/ext3/ioctl.c +--- linux-2.6.18-164.6.1_1/fs/ext3/ioctl.c 2009-12-22 12:37:55.000000000 +0530 ++++ linux-2.6.18-164.6.1_2/fs/ext3/ioctl.c 2009-12-22 12:40:44.000000000 +0530 +@@ -16,6 +16,70 @@ #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_ENCRYPTED \ -+ |FIEMAP_EXTENT_NET) -+#define SET_NO_UNMOUNTED_IO_FLAGS (FIEMAP_EXTENT_DATA_ENCRYPTED) -+#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; -+ if (flags & SET_NO_UNMOUNTED_IO_FLAGS) -+ flags |= FIEMAP_EXTENT_ENCODED; -+ -+ 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) +{ @@ -97,33 +29,6 @@ Index: linux-2.6.18-128.1.6/fs/ext3/ioctl.c + 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; @@ -167,7 +72,7 @@ Index: linux-2.6.18-128.1.6/fs/ext3/ioctl.c int ext3_ioctl (struct inode * inode, struct file * filp, unsigned int cmd, unsigned long arg) -@@ -276,7 +430,9 @@ flags_err: +@@ -276,7 +340,9 @@ flags_err: return err; } @@ -178,319 +83,14 @@ Index: linux-2.6.18-128.1.6/fs/ext3/ioctl.c default: return -ENOTTY; -Index: linux-2.6.18-128.1.6/include/linux/ext3_fs.h -=================================================================== ---- linux-2.6.18-128.1.6.orig/include/linux/ext3_fs.h -+++ linux-2.6.18-128.1.6/include/linux/ext3_fs.h -@@ -258,15 +258,19 @@ struct ext3_new_group_data { - #define EXT3_IOC_SETFLAGS _IOW('f', 2, long) - #define EXT3_IOC_GETVERSION _IOR('f', 3, long) +diff -rupN linux-2.6.18-164.6.1_1/include/linux/ext3_fs.h linux-2.6.18-164.6.1_2/include/linux/ext3_fs.h +--- linux-2.6.18-164.6.1_1/include/linux/ext3_fs.h 2009-12-22 12:37:55.000000000 +0530 ++++ linux-2.6.18-164.6.1_2/include/linux/ext3_fs.h 2009-12-22 12:43:02.000000000 +0530 +@@ -260,6 +260,7 @@ struct ext3_new_group_data { #define EXT3_IOC_SETVERSION _IOW('f', 4, 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', 11, struct fiemap) ++#define EXT3_IOC_FIEMAP _IOWR('f', 11, struct fiemap) #define EXT3_IOC_GETVERSION_OLD _IOR('v', 1, long) #define EXT3_IOC_SETVERSION_OLD _IOW('v', 2, long) #ifdef CONFIG_JBD_DEBUG - #define EXT3_IOC_WAIT_FOR_READONLY _IOR('f', 99, long) - #endif --#define EXT3_IOC_GETRSVSZ _IOR('f', 5, long) --#define EXT3_IOC_SETRSVSZ _IOW('f', 6, long) -+ -+/* FIEMAP flags supported by ext3 */ -+#define EXT3_FIEMAP_FLAGS_COMPAT (FIEMAP_FLAG_SYNC) - - /* - * Mount options -@@ -1041,6 +1045,9 @@ extern int ext3_block_truncate_page(hand - /* ioctl.c */ - extern int ext3_ioctl (struct inode *, 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 *); -@@ -1118,7 +1125,6 @@ ext3_get_blocks_wrap(handle_t *handle, s - return ret; - } - -- - #endif /* __KERNEL__ */ - - /* EXT3_IOC_CREATE_INUM at bottom of file (visible to kernel and user). */ -Index: linux-2.6.18-128.1.6/include/linux/ext3_extents.h -=================================================================== ---- linux-2.6.18-128.1.6.orig/include/linux/ext3_extents.h -+++ linux-2.6.18-128.1.6/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 *, -- struct ext3_ext_cache *, -- void *); -+ struct ext3_ext_cache *, -+ struct ext3_extent *, void *); -+ -+#define HAVE_EXT_PREPARE_CB_EXTENT - - #define EXT_CONTINUE 0 - #define EXT_BREAK 1 -@@ -153,6 +155,26 @@ typedef int (*ext_prepare_callback)(stru - #define EXT_MAX_BLOCK 0xffffffff - #define EXT_UNSET_BLOCK 1 - -+/* -+ * EXT_INIT_MAX_LEN is the maximum number of blocks we can have in an -+ * initialized extent. This is 2^15 and not (2^16 - 1), since we use the -+ * MSB of ee_len field in the extent datastructure to signify if this -+ * particular extent is an initialized extent or an uninitialized (i.e. -+ * preallocated). -+ * EXT_UNINIT_MAX_LEN is the maximum number of blocks we can have in an -+ * uninitialized extent. -+ * If ee_len is <= 0x8000, it is an initialized extent. Otherwise, it is an -+ * uninitialized one. In other words, if MSB of ee_len is set, it is an -+ * uninitialized extent with only one special scenario when ee_len = 0x8000. -+ * In this case we can not have an uninitialized extent of zero length and -+ * thus we make it as a special case of initialized extent with 0x8000 length. -+ * This way we get better extent-to-group alignment for initialized extents. -+ * Hence, the maximum number of blocks we can have in an *initialized* -+ * extent is 2^15 (32768) and in an *uninitialized* extent is 2^15-1 (32767). -+ */ -+#define EXT_INIT_MAX_LEN (1UL << 15) -+#define EXT_UNINIT_MAX_LEN (EXT_INIT_MAX_LEN - 1) -+ - #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) -@@ -220,6 +242,12 @@ ext3_ext_invalidate_cache(struct inode * - EXT3_I(inode)->i_cached_extent.ec_type = EXT3_EXT_CACHE_NO; - } - -+static inline int ext3_ext_is_uninitialized(struct ext3_extent *ext) -+{ -+ /* Extent with ee_len of 0x8000 is treated as an initialized extent */ -+ 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-2.6.18-128.1.6/fs/ext3/extents.c -=================================================================== ---- linux-2.6.18-128.1.6.orig/fs/ext3/extents.c -+++ linux-2.6.18-128.1.6/fs/ext3/extents.c -@@ -41,6 +41,7 @@ - #include - #include - #include -+#include "fiemap.h" - #include - - -@@ -1481,7 +1482,7 @@ int ext3_ext_walk_space(struct inode *in - } - - BUG_ON(cbex.ec_len == 0); -- err = func(inode, path, &cbex, cbdata); -+ err = func(inode, path, &cbex, ex, cbdata); - ext3_ext_drop_refs(path); - - if (err < 0) -@@ -2296,6 +2297,103 @@ int ext3_ext_writepage_trans_blocks(stru - return needed; - } - -+/* -+ * 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_extent_info *fieinfo = data; -+ unsigned char blksize_bits = inode->i_sb->s_blocksize_bits; -+ __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; -+ } -+ } -+ -+ 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; -+ -+ /* -+ * 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 (ext3_ext_next_allocated_block(path) == EXT_MAX_BLOCK || -+ newex->ec_block + newex->ec_len - 1 == 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 fiemap_extent_info *fieinfo, -+ __u64 start, __u64 len) -+{ -+ ext3_fsblk_t start_blk; -+ ext3_fsblk_t len_blks; -+ int error = 0; -+ -+ if (!(EXT3_I(inode)->i_flags & EXT3_EXTENTS_FL)) -+ return -EOPNOTSUPP; -+ -+ if (fiemap_check_flags(fieinfo, EXT3_FIEMAP_FLAGS_COMPAT)) -+ return -EBADR; -+ -+ start_blk = start >> inode->i_sb->s_blocksize_bits; -+ len_blks = (len + inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits; -+ -+ /* -+ * Walk the extent tree gathering extent information. -+ * ext3_ext_fiemap_cb will push extents back to user. -+ */ -+ mutex_lock(&EXT3_I(inode)->truncate_mutex); -+ error = ext3_ext_walk_space(inode, start_blk, len_blks, -+ ext3_ext_fiemap_cb, fieinfo); -+ mutex_unlock(&EXT3_I(inode)->truncate_mutex); -+ -+ return error; -+} -+ - EXPORT_SYMBOL(ext3_mark_inode_dirty); - EXPORT_SYMBOL(ext3_ext_invalidate_cache); - EXPORT_SYMBOL(ext3_ext_insert_extent); -Index: linux-2.6.18-128.1.6/fs/ext3/fiemap.h -=================================================================== ---- /dev/null -+++ linux-2.6.18-128.1.6/fs/ext3/fiemap.h -@@ -0,0 +1,85 @@ -+/* -+ * FIEMAP ioctl infrastructure. -+ * -+ * Copyright 2008 Sun Microsystems, Inc. -+ * -+ * Author: Kalpak Shah -+ * Andreas Dilger -+ */ -+ -+#ifndef _LINUX_EXT3_FIEMAP_H -+#define _LINUX_EXT3_FIEMAP_H -+ -+struct fiemap_extent { -+ __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 */ -+ __u64 fe_reserved64[2]; -+ __u32 fe_flags; /* FIEMAP_EXTENT_* flags for this extent */ -+ __u32 fe_device; /* device number for this extent */ -+ __u32 fe_reserved[2]; -+}; -+ -+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 helper definition. -+ */ -+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_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_ENCODED 0x00000008 /* Data can not be read -+ * while fs is unmounted */ -+#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. */ -+ -+/* Lustre specific flags - use a high bit, don't conflict with upstream flag */ -+#define FIEMAP_EXTENT_NO_DIRECT 0x40000000 /* Data mapping undefined */ -+#define FIEMAP_EXTENT_NET 0x80000000 /* Data stored remotely. -+ * Sets NO_DIRECT flag */ -+ -+#endif /* _LINUX_EXT3_FIEMAP_H */ -+ diff --git a/ldiskfs/kernel_patches/patches/ext4-fiemap-2.6-rhel5.patch b/ldiskfs/kernel_patches/patches/ext4-fiemap-2.6-rhel5.patch index b9468f8..ade2692 100644 --- a/ldiskfs/kernel_patches/patches/ext4-fiemap-2.6-rhel5.patch +++ b/ldiskfs/kernel_patches/patches/ext4-fiemap-2.6-rhel5.patch @@ -1,81 +1,24 @@ -A large part of this code is from the generic VFS code in fs/ioctl.c in the -upstream kernel. - -Index: linux-2.6.18-128.1.6/fs/ext4/ioctl.c -=================================================================== ---- linux-2.6.18-128.1.6.orig/fs/ext4/ioctl.c -+++ linux-2.6.18-128.1.6/fs/ext4/ioctl.c -@@ -17,6 +17,162 @@ +diff -rupN linux-2.6.18-164.6.1_1/fs/ext4/ext4.h linux-2.6.18-164.6.1_2/fs/ext4/ext4.h +--- linux-2.6.18-164.6.1_1/fs/ext4/ext4.h 2009-12-22 13:07:27.000000000 +0530 ++++ linux-2.6.18-164.6.1_2/fs/ext4/ext4.h 2009-12-22 13:10:18.000000000 +0530 +@@ -305,6 +305,7 @@ struct ext4_new_group_data { + #define EXT4_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long) + #define EXT4_IOC_GROUP_ADD _IOW('f', 8, struct ext4_new_group_input) + #define EXT4_IOC_MIGRATE _IO('f', 9) ++#define EXT4_IOC_FIEMAP _IOWR('f', 11, struct fiemap) + /* note ioctl 11 reserved for filesystem-independent FIEMAP ioctl */ + + /* +diff -rupN linux-2.6.18-164.6.1_1/fs/ext4/ioctl.c linux-2.6.18-164.6.1_2/fs/ext4/ioctl.c +--- linux-2.6.18-164.6.1_1/fs/ext4/ioctl.c 2009-12-22 13:06:51.000000000 +0530 ++++ linux-2.6.18-164.6.1_2/fs/ext4/ioctl.c 2009-12-22 13:09:45.000000000 +0530 +@@ -17,6 +17,71 @@ #include "ext4_jbd2.h" #include "ext4.h" -+#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_ENCRYPTED \ -+ |FIEMAP_EXTENT_NET) -+#define SET_NO_UNMOUNTED_IO_FLAGS (FIEMAP_EXTENT_DATA_ENCRYPTED) -+#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; -+ if (flags & SET_NO_UNMOUNTED_IO_FLAGS) -+ flags |= FIEMAP_EXTENT_ENCODED; -+ -+ 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) +{ @@ -97,33 +40,6 @@ Index: linux-2.6.18-128.1.6/fs/ext4/ioctl.c + 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; @@ -168,135 +84,13 @@ Index: linux-2.6.18-128.1.6/fs/ext4/ioctl.c long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { struct inode *inode = filp->f_dentry->d_inode; -@@ -257,6 +413,10 @@ flags_err: - case EXT4_IOC_MIGRATE: - return ext4_ext_migrate(inode, filp, cmd, arg); - +@@ -249,6 +314,9 @@ flags_out: + mutex_unlock(&(inode->i_mutex)); + return err; + } + case EXT4_IOC_FIEMAP: { + return ioctl_fiemap(inode, filp, arg); + } -+ + default: return -ENOTTY; - } -Index: linux-2.6.18-128.1.6/fs/ext4/ext4.h -=================================================================== ---- linux-2.6.18-128.1.6.orig/fs/ext4/ext4.h -+++ linux-2.6.18-128.1.6/fs/ext4/ext4.h -@@ -300,6 +300,7 @@ struct ext4_new_group_data { - #define EXT4_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long) - #define EXT4_IOC_GROUP_ADD _IOW('f', 8, struct ext4_new_group_input) - #define EXT4_IOC_MIGRATE _IO('f', 9) -+#define EXT4_IOC_FIEMAP _IOWR('f', 11, struct fiemap) - /* note ioctl 11 reserved for filesystem-independent FIEMAP ioctl */ - - /* -@@ -317,6 +318,8 @@ struct ext4_new_group_data { - #define EXT4_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION - #define EXT4_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION - -+/* FIEMAP flags supported by ext4 */ -+#define EXT4_FIEMAP_FLAGS_COMPAT (FIEMAP_FLAG_SYNC) - - /* - * Mount options -@@ -1117,6 +1120,9 @@ extern int ext4_page_mkwrite(struct vm_a - /* ioctl.c */ - extern long ext4_ioctl(struct file *, unsigned int, unsigned long); - extern long ext4_compat_ioctl(struct file *, unsigned int, unsigned long); -+struct fiemap_extent_info; -+extern int ext4_fiemap(struct inode *, struct fiemap_extent_info *, __u64, -+ __u64); - - /* migrate.c */ - extern int ext4_ext_migrate(struct inode *, struct file *, unsigned int, -Index: linux-2.6.18-128.1.6/fs/ext4/fiemap.h -=================================================================== ---- /dev/null -+++ linux-2.6.18-128.1.6/fs/ext4/fiemap.h -@@ -0,0 +1,85 @@ -+/* -+ * FIEMAP ioctl infrastructure. -+ * -+ * Copyright 2008 Sun Microsystems, Inc -+ * -+ * Author: Kalpak Shah -+ * Andreas Dilger -+ */ -+ -+#ifndef _LINUX_EXT4_FIEMAP_H -+#define _LINUX_EXT4_FIEMAP_H -+ -+struct fiemap_extent { -+ __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 */ -+ __u64 fe_reserved64[2]; -+ __u32 fe_flags; /* FIEMAP_EXTENT_* flags for this extent */ -+ __u32 fe_device; /* device number for this extent */ -+ __u32 fe_reserved[2]; -+}; -+ -+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 helper definition. -+ */ -+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_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_ENCODED 0x00000008 /* Data can not be read -+ * while fs is unmounted */ -+#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. */ -+ -+/* Lustre specific flags - use a high bit, don't conflict with upstream flag */ -+#define FIEMAP_EXTENT_NO_DIRECT 0x40000000 /* Data mapping undefined */ -+#define FIEMAP_EXTENT_NET 0x80000000 /* Data stored remotely. -+ * Sets NO_DIRECT flag */ -+ -+#endif /* _LINUX_EXT4_FIEMAP_H */ -+ -- 1.8.3.1