Messages in this thread Patch in this message | | | Date | Mon, 14 May 2007 15:15:19 +0530 | From | Bharata B Rao <> | Subject | [RFC][PATCH 14/14] tmpfs whiteout support |
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From: Jan Blunck <j.blunck@tu-harburg.de> Subject: tmpfs whiteout support
Introduce whiteout support to tmpfs.
Signed-off-by: Jan Blunck <j.blunck@tu-harburg.de> Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com> --- mm/shmem.c | 9 ++++++++- 1 files changed, 8 insertions(+), 1 deletion(-)
--- a/mm/shmem.c +++ b/mm/shmem.c @@ -74,7 +74,7 @@ #define LATENCY_LIMIT 64 /* Pretend that each entry is of this size in directory's i_size */ -#define BOGO_DIRENT_SIZE 20 +#define BOGO_DIRENT_SIZE 1 /* Flag allocation requirements to shmem_getpage and shmem_swp_alloc */ enum sgp_type { @@ -1772,6 +1772,11 @@ static int shmem_create(struct inode *di return shmem_mknod(dir, dentry, mode | S_IFREG, 0); } +static int shmem_whiteout(struct inode *dir, struct dentry *dentry) +{ + return shmem_mknod(dir, dentry, S_IRUGO | S_IWUGO | S_IFWHT, 0); +} + /* * Link a file.. */ @@ -2399,6 +2404,7 @@ static const struct inode_operations shm .rmdir = shmem_rmdir, .mknod = shmem_mknod, .rename = shmem_rename, + .whiteout = shmem_whiteout, #endif #ifdef CONFIG_TMPFS_POSIX_ACL .setattr = shmem_notify_change, @@ -2453,6 +2459,7 @@ static struct file_system_type tmpfs_fs_ .name = "tmpfs", .get_sb = shmem_get_sb, .kill_sb = kill_litter_super, + .fs_flags = FS_WHT, }; static struct vfsmount *shm_mnt; - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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