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| author | Al Viro <viro@zeniv.linux.org.uk> | 2008-05-09 03:11:17 +0200 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2008-05-16 23:22:39 +0200 |
| commit | afbec7fff4928c273a1f1bb14dfdfdf62688a193 (patch) | |
| tree | e5cc1e5273e98abf3195fba488a43ee3ec24f859 /fs | |
| parent | [PATCH] dup_fd() part 2 (diff) | |
| download | linux-afbec7fff4928c273a1f1bb14dfdfdf62688a193.tar.xz linux-afbec7fff4928c273a1f1bb14dfdfdf62688a193.zip | |
[PATCH] dup_fd() - part 3
merge alloc_files() into dup_fd(), leave setting newf->fdt until the end
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/file.c | 43 |
1 files changed, 15 insertions, 28 deletions
diff --git a/fs/file.c b/fs/file.c index 6491b2b5bc38..689d2b6947e3 100644 --- a/fs/file.c +++ b/fs/file.c @@ -273,31 +273,6 @@ static int count_open_files(struct fdtable *fdt) return i; } -static struct files_struct *alloc_files(void) -{ - struct files_struct *newf; - struct fdtable *fdt; - - newf = kmem_cache_alloc(files_cachep, GFP_KERNEL); - if (!newf) - goto out; - - atomic_set(&newf->count, 1); - - spin_lock_init(&newf->file_lock); - newf->next_fd = 0; - fdt = &newf->fdtab; - fdt->max_fds = NR_OPEN_DEFAULT; - fdt->close_on_exec = (fd_set *)&newf->close_on_exec_init; - fdt->open_fds = (fd_set *)&newf->open_fds_init; - fdt->fd = &newf->fd_array[0]; - INIT_RCU_HEAD(&fdt->rcu); - fdt->next = NULL; - rcu_assign_pointer(newf->fdt, fdt); -out: - return newf; -} - /* * Allocate a new files structure and copy contents from the * passed in files structure. @@ -311,13 +286,24 @@ struct files_struct *dup_fd(struct files_struct *oldf, int *errorp) struct fdtable *old_fdt, *new_fdt; *errorp = -ENOMEM; - newf = alloc_files(); + newf = kmem_cache_alloc(files_cachep, GFP_KERNEL); if (!newf) goto out; + atomic_set(&newf->count, 1); + + spin_lock_init(&newf->file_lock); + newf->next_fd = 0; + new_fdt = &newf->fdtab; + new_fdt->max_fds = NR_OPEN_DEFAULT; + new_fdt->close_on_exec = (fd_set *)&newf->close_on_exec_init; + new_fdt->open_fds = (fd_set *)&newf->open_fds_init; + new_fdt->fd = &newf->fd_array[0]; + INIT_RCU_HEAD(&new_fdt->rcu); + new_fdt->next = NULL; + spin_lock(&oldf->file_lock); old_fdt = files_fdtable(oldf); - new_fdt = files_fdtable(newf); open_files = count_open_files(old_fdt); /* @@ -341,7 +327,6 @@ struct files_struct *dup_fd(struct files_struct *oldf, int *errorp) *errorp = -EMFILE; goto out_release; } - rcu_assign_pointer(files->fdt, new_fdt); /* * Reacquire the oldf lock and a pointer to its fd table @@ -391,6 +376,8 @@ struct files_struct *dup_fd(struct files_struct *oldf, int *errorp) memset(&new_fdt->close_on_exec->fds_bits[start], 0, left); } + rcu_assign_pointer(newf->fdt, new_fdt); + return newf; out_release: |