From 48fde701aff662559b38d9a609574068f22d00fe Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sun, 8 Jan 2012 22:15:13 -0500 Subject: switch open-coded instances of d_make_root() to new helper Signed-off-by: Al Viro --- drivers/usb/core/inode.c | 9 +-------- drivers/usb/gadget/f_fs.c | 8 ++------ drivers/usb/gadget/inode.c | 4 +--- 3 files changed, 4 insertions(+), 17 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/core/inode.c b/drivers/usb/core/inode.c index 9e186f3da839..bdaef8e36020 100644 --- a/drivers/usb/core/inode.c +++ b/drivers/usb/core/inode.c @@ -462,16 +462,9 @@ static int usbfs_fill_super(struct super_block *sb, void *data, int silent) sb->s_op = &usbfs_ops; sb->s_time_gran = 1; inode = usbfs_get_inode(sb, S_IFDIR | 0755, 0); - - if (!inode) { - dbg("%s: could not get inode!",__func__); - return -ENOMEM; - } - - root = d_alloc_root(inode); + root = d_make_root(inode); if (!root) { dbg("%s: could not get root dentry!",__func__); - iput(inode); return -ENOMEM; } sb->s_root = root; diff --git a/drivers/usb/gadget/f_fs.c b/drivers/usb/gadget/f_fs.c index f63dc6c150d2..d825b248728a 100644 --- a/drivers/usb/gadget/f_fs.c +++ b/drivers/usb/gadget/f_fs.c @@ -1063,13 +1063,9 @@ static int ffs_sb_fill(struct super_block *sb, void *_data, int silent) &simple_dir_operations, &simple_dir_inode_operations, &data->perms); - if (unlikely(!inode)) + sb->s_root = d_make_root(inode); + if (unlikely(!sb->s_root)) goto Enomem; - sb->s_root = d_alloc_root(inode); - if (unlikely(!sb->s_root)) { - iput(inode); - goto Enomem; - } /* EP0 file */ if (unlikely(!ffs_sb_create_file(sb, "ep0", ffs, diff --git a/drivers/usb/gadget/inode.c b/drivers/usb/gadget/inode.c index ae04266dba1b..c95eea43b637 100644 --- a/drivers/usb/gadget/inode.c +++ b/drivers/usb/gadget/inode.c @@ -2059,10 +2059,8 @@ gadgetfs_fill_super (struct super_block *sb, void *opts, int silent) if (!inode) goto Enomem; inode->i_op = &simple_dir_inode_operations; - if (!(sb->s_root = d_alloc_root (inode))) { - iput(inode); + if (!(sb->s_root = d_make_root (inode))) goto Enomem; - } /* the ep0 file is named after the controller we expect; * user mode code can use it for sanity checks, like we do. -- cgit v1.2.3 From 318ceed088497d1ca839b1172518ac4cc7096b82 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sun, 12 Feb 2012 22:08:01 -0500 Subject: tidy up after d_make_root() conversion Signed-off-by: Al Viro --- drivers/misc/ibmasm/ibmasmfs.c | 14 ++++++-------- drivers/oprofile/oprofilefs.c | 9 +++------ drivers/usb/core/inode.c | 6 ++---- fs/pstore/inode.c | 24 +++++++----------------- fs/ramfs/inode.c | 20 ++++++-------------- mm/shmem.c | 6 ++---- 6 files changed, 26 insertions(+), 53 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/misc/ibmasm/ibmasmfs.c b/drivers/misc/ibmasm/ibmasmfs.c index 15f24f362208..1c034b80d408 100644 --- a/drivers/misc/ibmasm/ibmasmfs.c +++ b/drivers/misc/ibmasm/ibmasmfs.c @@ -87,7 +87,7 @@ static LIST_HEAD(service_processors); static struct inode *ibmasmfs_make_inode(struct super_block *sb, int mode); -static void ibmasmfs_create_files (struct super_block *sb, struct dentry *root); +static void ibmasmfs_create_files (struct super_block *sb); static int ibmasmfs_fill_super (struct super_block *sb, void *data, int silent); @@ -114,7 +114,6 @@ static struct file_system_type ibmasmfs_type = { static int ibmasmfs_fill_super (struct super_block *sb, void *data, int silent) { struct inode *root; - struct dentry *root_dentry; sb->s_blocksize = PAGE_CACHE_SIZE; sb->s_blocksize_bits = PAGE_CACHE_SHIFT; @@ -129,12 +128,11 @@ static int ibmasmfs_fill_super (struct super_block *sb, void *data, int silent) root->i_op = &simple_dir_inode_operations; root->i_fop = ibmasmfs_dir_ops; - root_dentry = d_make_root(root); - if (!root_dentry) + sb->s_root = d_make_root(root); + if (!sb->s_root) return -ENOMEM; - sb->s_root = root_dentry; - ibmasmfs_create_files(sb, root_dentry); + ibmasmfs_create_files(sb); return 0; } @@ -610,7 +608,7 @@ static const struct file_operations remote_settings_fops = { }; -static void ibmasmfs_create_files (struct super_block *sb, struct dentry *root) +static void ibmasmfs_create_files (struct super_block *sb) { struct list_head *entry; struct service_processor *sp; @@ -619,7 +617,7 @@ static void ibmasmfs_create_files (struct super_block *sb, struct dentry *root) struct dentry *dir; struct dentry *remote_dir; sp = list_entry(entry, struct service_processor, node); - dir = ibmasmfs_create_dir(sb, root, sp->dirname); + dir = ibmasmfs_create_dir(sb, sb->s_root, sp->dirname); if (!dir) continue; diff --git a/drivers/oprofile/oprofilefs.c b/drivers/oprofile/oprofilefs.c index 277bb70b8d75..ee8fd037bb53 100644 --- a/drivers/oprofile/oprofilefs.c +++ b/drivers/oprofile/oprofilefs.c @@ -238,7 +238,6 @@ struct dentry *oprofilefs_mkdir(struct super_block *sb, static int oprofilefs_fill_super(struct super_block *sb, void *data, int silent) { struct inode *root_inode; - struct dentry *root_dentry; sb->s_blocksize = PAGE_CACHE_SIZE; sb->s_blocksize_bits = PAGE_CACHE_SHIFT; @@ -251,13 +250,11 @@ static int oprofilefs_fill_super(struct super_block *sb, void *data, int silent) return -ENOMEM; root_inode->i_op = &simple_dir_inode_operations; root_inode->i_fop = &simple_dir_operations; - root_dentry = d_make_root(root_inode); - if (!root_dentry) + sb->s_root = d_make_root(root_inode); + if (!sb->s_root) return -ENOMEM; - sb->s_root = root_dentry; - - oprofile_create_files(sb, root_dentry); + oprofile_create_files(sb, sb->s_root); // FIXME: verify kill_litter_super removes our dentries return 0; diff --git a/drivers/usb/core/inode.c b/drivers/usb/core/inode.c index bdaef8e36020..06c175aee6a3 100644 --- a/drivers/usb/core/inode.c +++ b/drivers/usb/core/inode.c @@ -454,7 +454,6 @@ static const struct super_operations usbfs_ops = { static int usbfs_fill_super(struct super_block *sb, void *data, int silent) { struct inode *inode; - struct dentry *root; sb->s_blocksize = PAGE_CACHE_SIZE; sb->s_blocksize_bits = PAGE_CACHE_SHIFT; @@ -462,12 +461,11 @@ static int usbfs_fill_super(struct super_block *sb, void *data, int silent) sb->s_op = &usbfs_ops; sb->s_time_gran = 1; inode = usbfs_get_inode(sb, S_IFDIR | 0755, 0); - root = d_make_root(inode); - if (!root) { + sb->s_root = d_make_root(inode); + if (!sb->s_root) { dbg("%s: could not get root dentry!",__func__); return -ENOMEM; } - sb->s_root = root; return 0; } diff --git a/fs/pstore/inode.c b/fs/pstore/inode.c index ec7d1fb6f35a..f37c32b94525 100644 --- a/fs/pstore/inode.c +++ b/fs/pstore/inode.c @@ -278,9 +278,7 @@ fail: int pstore_fill_super(struct super_block *sb, void *data, int silent) { - struct inode *inode = NULL; - struct dentry *root; - int err; + struct inode *inode; save_mount_options(sb, data); @@ -296,25 +294,17 @@ int pstore_fill_super(struct super_block *sb, void *data, int silent) parse_options(data); inode = pstore_get_inode(sb, NULL, S_IFDIR | 0755, 0); - if (!inode) { - err = -ENOMEM; - goto fail; - } - /* override ramfs "dir" options so we catch unlink(2) */ - inode->i_op = &pstore_dir_inode_operations; - - root = d_make_root(inode); - sb->s_root = root; - if (!root) { - err = -ENOMEM; - goto fail; + if (inode) { + /* override ramfs "dir" options so we catch unlink(2) */ + inode->i_op = &pstore_dir_inode_operations; } + sb->s_root = d_make_root(inode); + if (!sb->s_root) + return -ENOMEM; pstore_get_records(0); return 0; -fail: - return err; } static struct dentry *pstore_mount(struct file_system_type *fs_type, diff --git a/fs/ramfs/inode.c b/fs/ramfs/inode.c index b6612d2ed718..a1fdabe21dec 100644 --- a/fs/ramfs/inode.c +++ b/fs/ramfs/inode.c @@ -209,21 +209,19 @@ static int ramfs_parse_options(char *data, struct ramfs_mount_opts *opts) int ramfs_fill_super(struct super_block *sb, void *data, int silent) { struct ramfs_fs_info *fsi; - struct inode *inode = NULL; + struct inode *inode; int err; save_mount_options(sb, data); fsi = kzalloc(sizeof(struct ramfs_fs_info), GFP_KERNEL); sb->s_fs_info = fsi; - if (!fsi) { - err = -ENOMEM; - goto fail; - } + if (!fsi) + return -ENOMEM; err = ramfs_parse_options(data, &fsi->mount_opts); if (err) - goto fail; + return err; sb->s_maxbytes = MAX_LFS_FILESIZE; sb->s_blocksize = PAGE_CACHE_SIZE; @@ -234,16 +232,10 @@ int ramfs_fill_super(struct super_block *sb, void *data, int silent) inode = ramfs_get_inode(sb, NULL, S_IFDIR | fsi->mount_opts.mode, 0); sb->s_root = d_make_root(inode); - if (!sb->s_root) { - err = -ENOMEM; - goto fail; - } + if (!sb->s_root) + return -ENOMEM; return 0; -fail: - kfree(fsi); - sb->s_fs_info = NULL; - return err; } struct dentry *ramfs_mount(struct file_system_type *fs_type, diff --git a/mm/shmem.c b/mm/shmem.c index 154243f0a27c..9bc4a2353944 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -2175,7 +2175,6 @@ static void shmem_put_super(struct super_block *sb) int shmem_fill_super(struct super_block *sb, void *data, int silent) { struct inode *inode; - struct dentry *root; struct shmem_sb_info *sbinfo; int err = -ENOMEM; @@ -2232,10 +2231,9 @@ int shmem_fill_super(struct super_block *sb, void *data, int silent) goto failed; inode->i_uid = sbinfo->uid; inode->i_gid = sbinfo->gid; - root = d_make_root(inode); - if (!root) + sb->s_root = d_make_root(inode); + if (!sb->s_root) goto failed; - sb->s_root = root; return 0; failed: -- cgit v1.2.3 From 01e0fe0b10d8673554525984947cc5de21492462 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sat, 17 Mar 2012 02:17:32 -0400 Subject: usbfs: kill racy detection of simple_pin_fs() can check MS_KERNMOUNT in flags now Signed-off-by: Al Viro --- drivers/usb/core/inode.c | 10 +--------- 1 file changed, 1 insertion(+), 9 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/core/inode.c b/drivers/usb/core/inode.c index 06c175aee6a3..cefa0c8b5b6a 100644 --- a/drivers/usb/core/inode.c +++ b/drivers/usb/core/inode.c @@ -50,7 +50,6 @@ static const struct file_operations default_file_operations; static struct vfsmount *usbfs_mount; static int usbfs_mount_count; /* = 0 */ -static int ignore_mount = 0; static struct dentry *devices_usbfs_dentry; static int num_buses; /* = 0 */ @@ -256,7 +255,7 @@ static int remount(struct super_block *sb, int *flags, char *data) * i.e. it's a simple_pin_fs from create_special_files, * then ignore it. */ - if (ignore_mount) + if (*flags & MS_KERNMOUNT) return 0; if (parse_options(sb, data)) { @@ -582,11 +581,6 @@ static int create_special_files (void) struct dentry *parent; int retval; - /* the simple_pin_fs calls will call remount with no options - * without this flag that would overwrite the real mount options (if any) - */ - ignore_mount = 1; - /* create the devices special file */ retval = simple_pin_fs(&usb_fs_type, &usbfs_mount, &usbfs_mount_count); if (retval) { @@ -594,8 +588,6 @@ static int create_special_files (void) goto exit; } - ignore_mount = 0; - parent = usbfs_mount->mnt_root; devices_usbfs_dentry = fs_create_file ("devices", listmode | S_IFREG, parent, -- cgit v1.2.3 From 104bb37d3e0eb576b6aa61b9ed909e118e026bd2 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sun, 8 Jan 2012 16:13:28 -0500 Subject: gadgetfs: list_for_each_safe() misuse really weirdly spelled "while the list is non-empty, pick its first element, remove it from the list and free it" kind of loop... Signed-off-by: Al Viro --- drivers/usb/gadget/inode.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/gadget/inode.c b/drivers/usb/gadget/inode.c index c95eea43b637..f701afb349ee 100644 --- a/drivers/usb/gadget/inode.c +++ b/drivers/usb/gadget/inode.c @@ -1569,20 +1569,18 @@ delegate: static void destroy_ep_files (struct dev_data *dev) { - struct list_head *entry, *tmp; - DBG (dev, "%s %d\n", __func__, dev->state); /* dev->state must prevent interference */ restart: spin_lock_irq (&dev->lock); - list_for_each_safe (entry, tmp, &dev->epfiles) { + while (!list_empty(&dev->epfiles)) { struct ep_data *ep; struct inode *parent; struct dentry *dentry; /* break link to FS */ - ep = list_entry (entry, struct ep_data, epfiles); + ep = list_first_entry (&dev->epfiles, struct ep_data, epfiles); list_del_init (&ep->epfiles); dentry = ep->dentry; ep->dentry = NULL; @@ -1605,8 +1603,7 @@ restart: dput (dentry); mutex_unlock (&parent->i_mutex); - /* fds may still be open */ - goto restart; + spin_lock_irq (&dev->lock); } spin_unlock_irq (&dev->lock); } -- cgit v1.2.3