kernel_samsung_sm7125

jenna

History

David Howells 454e2398be [PATCH] VFS: Permit filesystem to override root dentry on mount Extend the get_sb() filesystem operation to take an extra argument that permits the VFS to pass in the target vfsmount that defines the mountpoint. The filesystem is then required to manually set the superblock and root dentry pointers. For most filesystems, this should be done with simple_set_mnt() which will set the superblock pointer and then set the root dentry to the superblock's s_root (as per the old default behaviour). The get_sb() op now returns an integer as there's now no need to return the superblock pointer. This patch permits a superblock to be implicitly shared amongst several mount points, such as can be done with NFS to avoid potential inode aliasing. In such a case, simple_set_mnt() would not be called, and instead the mnt_root and mnt_sb would be set directly. The patch also makes the following changes: () the get_sb_() convenience functions in the core kernel now take a vfsmount pointer argument and return an integer, so most filesystems have to change very little. () If one of the convenience function is not used, then get_sb() should normally call simple_set_mnt() to instantiate the vfsmount. This will always return 0, and so can be tail-called from get_sb(). () generic_shutdown_super() now calls shrink_dcache_sb() to clean up the dcache upon superblock destruction rather than shrink_dcache_anon(). This is required because the superblock may now have multiple trees that aren't actually bound to s_root, but that still need to be cleaned up. The currently called functions assume that the whole tree is rooted at s_root, and that anonymous dentries are not the roots of trees which results in dentries being left unculled. However, with the way NFS superblock sharing are currently set to be implemented, these assumptions are violated: the root of the filesystem is simply a dummy dentry and inode (the real inode for '/' may well be inaccessible), and all the vfsmounts are rooted on anonymous[] dentries with child trees. [] Anonymous until discovered from another tree. () The documentation has been adjusted, including the additional bit of changing ext2_ into foo_* in the documentation. [akpm@osdl.org: convert ipath_fs, do other stuff] Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Al Viro <viro@zeniv.linux.org.uk> Cc: Nathan Scott <nathans@sgi.com> Cc: Roland Dreier <rolandd@cisco.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		19 years ago
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9p	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
adfs	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
affs	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
afs	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
autofs	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
autofs4	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
befs	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
bfs	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
cifs	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
coda	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
configfs	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
cramfs	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
debugfs	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
devfs	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
devpts	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
efs	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
exportfs	…
ext2	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
ext3	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
fat	…
freevxfs	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
fuse	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
hfs	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
hfsplus	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
hostfs	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
hpfs	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
hppfs	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
hugetlbfs	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
isofs	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
jbd	…
jffs	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
jffs2	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
jfs	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
lockd	…
minix	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
msdos	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
ncpfs	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
nfs	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
nfs_common	…
nfsd	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
nls	…
ntfs	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
ocfs2	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
openpromfs	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
partitions	…
proc	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
qnx4	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
ramfs	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
reiserfs	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
romfs	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
smbfs	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
sysfs	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
sysv	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
udf	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
ufs	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
vfat	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
xfs	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
Kconfig	…
Kconfig.binfmt	…
Makefile	…
aio.c	…
attr.c	…
bad_inode.c	…
binfmt_aout.c	…
binfmt_elf.c	…
binfmt_elf_fdpic.c	…
binfmt_em86.c	…
binfmt_flat.c	…
binfmt_misc.c	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
binfmt_script.c	…
binfmt_som.c	…
bio.c	…
block_dev.c	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
buffer.c	…
char_dev.c	…
compat.c	…
compat_ioctl.c	…
dcache.c	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
dcookies.c	…
direct-io.c	…
dnotify.c	…
dquot.c	…
drop_caches.c	…
eventpoll.c	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
exec.c	…
fcntl.c	…
fifo.c	…
file.c	…
file_table.c	…
filesystems.c	…
fs-writeback.c	…
inode.c	…
inotify.c	…
inotify_user.c	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
ioctl.c	…
ioprio.c	…
libfs.c	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
locks.c	…
mbcache.c	…
mpage.c	…
namei.c	…
namespace.c	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
nfsctl.c	…
open.c	…
pipe.c	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
pnode.c	…
pnode.h	…
posix_acl.c	…
quota.c	…
quota_v1.c	…
quota_v2.c	…
read_write.c	…
readdir.c	…
select.c	…
seq_file.c	…
splice.c	…
stat.c	…
super.c	[PATCH] VFS: Permit filesystem to override root dentry on mount	19 years ago
sync.c	…
xattr.c	…
xattr_acl.c	…