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[PATCH] ufs2 write: mount as rw
These series of patches add UFS2 write-support. UFS2 - is default file system for recent versions of FreeBSD. The main differences from UFS1 from write support point of view are: 1)Not all inodes are allocated during formatation of disk. 2)All meta-data(pointer to data blocks) are 64bit(in UFS1 they are 32bit). So patch series consist of 1)make possible mount UFS2 in read-write mode 2)code to write ufs2 inodes and code to initialize inodes chunks. 3)work with 64bit meta-data I made simple testing like create/deleting/writing/reading/truncating, also I ran fsx-linux and untar and build kernel on UFS1 and UFS2, after that FreeBSD fsck do not find any errors in fs. This patch makes possible to mount ufs2 "rw", and updates UFS2 documentation: remove note about bug(it fixed by reallocate blocks on the fly patch) and add me in the list of people who want receive bug reports. Signed-off-by: Evgeniy Dushistov <dushistov@mail.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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2 changed files with 8 additions and 10 deletions
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@ -21,7 +21,7 @@ ufstype=type_of_ufs
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supported as read-write
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supported as read-write
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ufs2 used in FreeBSD 5.x
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ufs2 used in FreeBSD 5.x
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supported as read-only
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supported as read-write
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5xbsd synonym for ufs2
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5xbsd synonym for ufs2
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@ -50,12 +50,11 @@ ufstype=type_of_ufs
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POSSIBLE PROBLEMS
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POSSIBLE PROBLEMS
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=================
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=================
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There is still bug in reallocation of fragment, in file fs/ufs/balloc.c,
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See next section, if you have any.
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line 364. But it seems working on current buffer cache configuration.
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BUG REPORTS
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BUG REPORTS
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===========
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===========
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Any ufs bug report you can send to daniel.pirkl@email.cz (do not send
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Any ufs bug report you can send to daniel.pirkl@email.cz or
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partition tables bug reports.)
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to dushistov@mail.ru (do not send partition tables bug reports).
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@ -61,6 +61,8 @@
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* UFS2 (of FreeBSD 5.x) support added by
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* UFS2 (of FreeBSD 5.x) support added by
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* Niraj Kumar <niraj17@iitbombay.org>, Jan 2004
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* Niraj Kumar <niraj17@iitbombay.org>, Jan 2004
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*
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*
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* UFS2 write support added by
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* Evgeniy Dushistov <dushistov@mail.ru>, 2007
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*/
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*/
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@ -674,10 +676,6 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
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uspi->s_sbsize = super_block_size = 1536;
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uspi->s_sbsize = super_block_size = 1536;
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uspi->s_sbbase = 0;
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uspi->s_sbbase = 0;
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flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
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flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
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if (!(sb->s_flags & MS_RDONLY)) {
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printk(KERN_INFO "ufstype=ufs2 is supported read-only\n");
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sb->s_flags |= MS_RDONLY;
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}
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break;
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break;
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case UFS_MOUNT_UFSTYPE_SUN:
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case UFS_MOUNT_UFSTYPE_SUN:
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@ -1156,7 +1154,8 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
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#else
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#else
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if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
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if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
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ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
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ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
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ufstype != UFS_MOUNT_UFSTYPE_SUNx86) {
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ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
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ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
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printk("this ufstype is read-only supported\n");
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printk("this ufstype is read-only supported\n");
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return -EINVAL;
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return -EINVAL;
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}
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}
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