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Add partial support for large (>4GB) files on ext2 filesystems. This

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support is partial in that it will refuse to create large files on
filesystems that haven't been upgraded to EXT2_DYN_REV or that don't
have the EXT2_FEATURE_RO_COMPAT_LARGE_FILE flag set in the superblock.

MFC after:	2 weeks
This commit is contained in:
Tim J. Robbins 2004-02-18 14:08:25 +00:00
parent 26d2edc770
commit ba122e68e0
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=125962
6 changed files with 32 additions and 2 deletions
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3
sys/gnu/ext2fs/ext2_fs.h
View File

@ -486,7 +486,8 @@ struct ext2_super_block {
EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
EXT2_FEATURE_RO_COMPAT_BTREE_DIR)
#else
#define EXT2_FEATURE_RO_COMPAT_SUPP EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER
#define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \
EXT2_FEATURE_RO_COMPAT_LARGE_FILE)
#endif
/*

10
sys/gnu/ext2fs/ext2_inode.c
View File

@ -164,6 +164,16 @@ printf("ext2_truncate called %d to %d\n", VTOI(ovp)->i_number, length);
* value of oszie is 0, length will be at least 1.
*/
if (osize < length) {
/*
* XXX Refuse to extend files past 2GB on old format
* filesystems or ones that don't already have the
* large file flag set in the superblock.
*/
if (osize < 0x8000000 && length >= 0x80000000 &&
(oip->i_e2fs->s_es->s_rev_level == EXT2_GOOD_OLD_REV ||
(oip->i_e2fs->s_es->s_feature_ro_compat &
EXT2_FEATURE_RO_COMPAT_LARGE_FILE) == 0))
return (EFBIG);
offset = blkoff(fs, length - 1);
lbn = lblkno(fs, length - 1);
aflags = B_CLRBUF;

4
sys/gnu/ext2fs/ext2_inode_cnv.c
View File

@ -77,6 +77,8 @@ ext2_ei2i(ei, ip)
*/
ip->i_mode = ei->i_links_count ? ei->i_mode : 0;
ip->i_size = ei->i_size;
if (S_ISREG(ip->i_mode))
ip->i_size |= ((u_int64_t)ei->i_size_high) << 32;
ip->i_atime = ei->i_atime;
ip->i_mtime = ei->i_mtime;
ip->i_ctime = ei->i_ctime;
@ -112,6 +114,8 @@ ext2_i2ei(ip, ei)
*/
ei->i_dtime = ei->i_links_count ? 0 : ip->i_mtime;
ei->i_size = ip->i_size;
if (S_ISREG(ip->i_mode))
ei->i_size_high = ip->i_size >> 32;
ei->i_atime = ip->i_atime;
ei->i_mtime = ip->i_mtime;
ei->i_ctime = ip->i_ctime;

3
sys/gnu/fs/ext2fs/ext2_fs.h
View File

@ -486,7 +486,8 @@ struct ext2_super_block {
EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
EXT2_FEATURE_RO_COMPAT_BTREE_DIR)
#else
#define EXT2_FEATURE_RO_COMPAT_SUPP EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER
#define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \
EXT2_FEATURE_RO_COMPAT_LARGE_FILE)
#endif
/*

10
sys/gnu/fs/ext2fs/ext2_inode.c
View File

@ -164,6 +164,16 @@ printf("ext2_truncate called %d to %d\n", VTOI(ovp)->i_number, length);
* value of oszie is 0, length will be at least 1.
*/
if (osize < length) {
/*
* XXX Refuse to extend files past 2GB on old format
* filesystems or ones that don't already have the
* large file flag set in the superblock.
*/
if (osize < 0x8000000 && length >= 0x80000000 &&
(oip->i_e2fs->s_es->s_rev_level == EXT2_GOOD_OLD_REV ||
(oip->i_e2fs->s_es->s_feature_ro_compat &
EXT2_FEATURE_RO_COMPAT_LARGE_FILE) == 0))
return (EFBIG);
offset = blkoff(fs, length - 1);
lbn = lblkno(fs, length - 1);
aflags = B_CLRBUF;

4
sys/gnu/fs/ext2fs/ext2_inode_cnv.c
View File

@ -77,6 +77,8 @@ ext2_ei2i(ei, ip)
*/
ip->i_mode = ei->i_links_count ? ei->i_mode : 0;
ip->i_size = ei->i_size;
if (S_ISREG(ip->i_mode))
ip->i_size |= ((u_int64_t)ei->i_size_high) << 32;
ip->i_atime = ei->i_atime;
ip->i_mtime = ei->i_mtime;
ip->i_ctime = ei->i_ctime;
@ -112,6 +114,8 @@ ext2_i2ei(ip, ei)
*/
ei->i_dtime = ei->i_links_count ? 0 : ip->i_mtime;
ei->i_size = ip->i_size;
if (S_ISREG(ip->i_mode))
ei->i_size_high = ip->i_size >> 32;
ei->i_atime = ip->i_atime;
ei->i_mtime = ip->i_mtime;
ei->i_ctime = ip->i_ctime;