From bc37e2830339cbfa42ac8579a7bf62fc4cdd360d Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Wed, 18 Jul 2007 14:30:28 +0900 Subject: sysfs: make sysfs_init_inode() static With sysfs_fill_super() converted to use sysfs_get_inode(), there is no user of sysfs_init_inode() outside of fs/sysfs/inode.c. Make it static. Signed-off-by: Tejun Heo Acked-by: Jean Delvare Signed-off-by: Greg Kroah-Hartman --- fs/sysfs/inode.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/sysfs/inode.c') diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c index 3756e152285a..10d1b52899f1 100644 --- a/fs/sysfs/inode.c +++ b/fs/sysfs/inode.c @@ -133,7 +133,7 @@ static inline void set_inode_attr(struct inode * inode, struct iattr * iattr) */ static struct lock_class_key sysfs_inode_imutex_key; -void sysfs_init_inode(struct sysfs_dirent *sd, struct inode *inode) +static void sysfs_init_inode(struct sysfs_dirent *sd, struct inode *inode) { inode->i_blocks = 0; inode->i_mapping->a_ops = &sysfs_aops; -- cgit v1.2.3 From 869512ab5ab93e5e82ad7d4aaf4ed098d23bfc3f Mon Sep 17 00:00:00 2001 From: Dave Young Date: Thu, 26 Jul 2007 14:53:53 +0000 Subject: sysfs: cleanup semaphore.h Cleanup semaphore.h Signed-off-by: Dave Young Signed-off-by: Greg Kroah-Hartman --- fs/sysfs/inode.c | 1 - 1 file changed, 1 deletion(-) (limited to 'fs/sysfs/inode.c') diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c index 10d1b52899f1..aecb6e771e2a 100644 --- a/fs/sysfs/inode.c +++ b/fs/sysfs/inode.c @@ -14,7 +14,6 @@ #include #include #include -#include #include "sysfs.h" extern struct super_block * sysfs_sb; -- cgit v1.2.3 From 90bc61359de0148f8627073d68a22edc7ed9893d Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Tue, 31 Jul 2007 19:15:08 +0900 Subject: sysfs: Remove first pass at shadow directory support While shadow directories appear to be a good idea, the current scheme of controlling their creation and destruction outside of sysfs appears to be a locking and maintenance nightmare in the face of sysfs directories dynamically coming and going. Which can now occur for directories containing network devices when CONFIG_SYSFS_DEPRECATED is not set. This patch removes everything from the initial shadow directory support that allowed the shadow directory creation to be controlled at a higher level. So except for a few bits of sysfs_rename_dir everything from commit b592fcfe7f06c15ec11774b5be7ce0de3aa86e73 is now gone. Signed-off-by: Eric W. Biederman Signed-off-by: Tejun Heo Signed-off-by: Greg Kroah-Hartman --- fs/sysfs/inode.c | 10 ---------- 1 file changed, 10 deletions(-) (limited to 'fs/sysfs/inode.c') diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c index aecb6e771e2a..45128b79bc68 100644 --- a/fs/sysfs/inode.c +++ b/fs/sysfs/inode.c @@ -33,16 +33,6 @@ static const struct inode_operations sysfs_inode_operations ={ .setattr = sysfs_setattr, }; -void sysfs_delete_inode(struct inode *inode) -{ - /* Free the shadowed directory inode operations */ - if (sysfs_is_shadowed_inode(inode)) { - kfree(inode->i_op); - inode->i_op = NULL; - } - return generic_delete_inode(inode); -} - int sysfs_setattr(struct dentry * dentry, struct iattr * iattr) { struct inode * inode = dentry->d_inode; -- cgit v1.2.3 From 41fc1c27452e041a18e5141b8203ee0ea72bc483 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Thu, 2 Aug 2007 21:38:03 +0900 Subject: sysfs: make sysfs_add/remove_one() call link/unlink_sibling() implictly When adding or removing a sysfs_dirent, the user used to be required to call link/unlink separately. It was for two reasons - code looked like that before sysfs_addrm_cxt conversion and to avoid looping through parent_sd->children list twice during removal. Performance optimization during removal just isn't worth it. Make sysfs_add/remove_one() call sysfs_link/unlink_sibing() implicitly. This makes code simpler albeit slightly less efficient. This change doesn't introduce any noticeable behavior change. Signed-off-by: Tejun Heo Acked-by: Cornelia Huck Signed-off-by: Greg Kroah-Hartman --- fs/sysfs/inode.c | 17 ++++------------- 1 file changed, 4 insertions(+), 13 deletions(-) (limited to 'fs/sysfs/inode.c') diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c index 45128b79bc68..efb4062fe099 100644 --- a/fs/sysfs/inode.c +++ b/fs/sysfs/inode.c @@ -189,25 +189,16 @@ void sysfs_instantiate(struct dentry *dentry, struct inode *inode) int sysfs_hash_and_remove(struct sysfs_dirent *dir_sd, const char *name) { struct sysfs_addrm_cxt acxt; - struct sysfs_dirent **pos, *sd; + struct sysfs_dirent *sd; if (!dir_sd) return -ENOENT; sysfs_addrm_start(&acxt, dir_sd); - for (pos = &dir_sd->s_children; *pos; pos = &(*pos)->s_sibling) { - sd = *pos; - - if (!sysfs_type(sd)) - continue; - if (!strcmp(sd->s_name, name)) { - *pos = sd->s_sibling; - sd->s_sibling = NULL; - sysfs_remove_one(&acxt, sd); - break; - } - } + sd = sysfs_find_dirent(dir_sd, name); + if (sd) + sysfs_remove_one(&acxt, sd); if (sysfs_addrm_finish(&acxt)) return 0; -- cgit v1.2.3 From 990e53f880be9ff93072b4cce590ec2826cee0b6 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Thu, 2 Aug 2007 21:38:03 +0900 Subject: sysfs: make sysfs_addrm_finish() return void With the previous sysfs_add_one() update, there is only one user of the return value of sysfs_addrm_finish() and the user can switch to testing @sd easily. Make sysfs_addrm_finish() return void for cleaner semantics as suggested by Satyam Sharma. This patch doesn't introduce any noticeable behavior change. Signed-off-by: Tejun Heo Cc: Satyam Sharma Acked-by: Cornelia Huck Signed-off-by: Greg Kroah-Hartman --- fs/sysfs/inode.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) (limited to 'fs/sysfs/inode.c') diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c index efb4062fe099..e22db6cd4df7 100644 --- a/fs/sysfs/inode.c +++ b/fs/sysfs/inode.c @@ -200,7 +200,10 @@ int sysfs_hash_and_remove(struct sysfs_dirent *dir_sd, const char *name) if (sd) sysfs_remove_one(&acxt, sd); - if (sysfs_addrm_finish(&acxt)) + sysfs_addrm_finish(&acxt); + + if (sd) return 0; - return -ENOENT; + else + return -ENOENT; } -- cgit v1.2.3 From 372e88bd1922228e0a55228f6dc8e311d1696fa0 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Mon, 20 Aug 2007 21:36:29 +0900 Subject: sysfs: Move all of inode initialization into sysfs_init_inode Signed-off-by: "Eric W. Biederman" Signed-off-by: Tejun Heo Cc: Cornelia Huck Signed-off-by: Greg Kroah-Hartman --- fs/sysfs/inode.c | 48 +++++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 45 insertions(+), 3 deletions(-) (limited to 'fs/sysfs/inode.c') diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c index e22db6cd4df7..200e1bf6f932 100644 --- a/fs/sysfs/inode.c +++ b/fs/sysfs/inode.c @@ -122,8 +122,22 @@ static inline void set_inode_attr(struct inode * inode, struct iattr * iattr) */ static struct lock_class_key sysfs_inode_imutex_key; +static int sysfs_count_nlink(struct sysfs_dirent *sd) +{ + struct sysfs_dirent *child; + int nr = 0; + + for (child = sd->s_children; child; child = child->s_sibling) + if (sysfs_type(child) == SYSFS_DIR) + nr++; + + return nr + 2; +} + static void sysfs_init_inode(struct sysfs_dirent *sd, struct inode *inode) { + struct bin_attribute *bin_attr; + inode->i_blocks = 0; inode->i_mapping->a_ops = &sysfs_aops; inode->i_mapping->backing_dev_info = &sysfs_backing_dev_info; @@ -139,6 +153,37 @@ static void sysfs_init_inode(struct sysfs_dirent *sd, struct inode *inode) set_inode_attr(inode, sd->s_iattr); } else set_default_inode_attr(inode, sd->s_mode); + + + /* initialize inode according to type */ + switch (sysfs_type(sd)) { + case SYSFS_ROOT: + inode->i_op = &sysfs_dir_inode_operations; + inode->i_fop = &sysfs_dir_operations; + inc_nlink(inode); /* directory, account for "." */ + break; + case SYSFS_DIR: + inode->i_op = &sysfs_dir_inode_operations; + inode->i_fop = &sysfs_dir_operations; + inode->i_nlink = sysfs_count_nlink(sd); + break; + case SYSFS_KOBJ_ATTR: + inode->i_size = PAGE_SIZE; + inode->i_fop = &sysfs_file_operations; + break; + case SYSFS_KOBJ_BIN_ATTR: + bin_attr = sd->s_elem.bin_attr.bin_attr; + inode->i_size = bin_attr->size; + inode->i_fop = &bin_fops; + break; + case SYSFS_KOBJ_LINK: + inode->i_op = &sysfs_symlink_inode_operations; + break; + default: + BUG(); + } + + unlock_new_inode(inode); } /** @@ -180,9 +225,6 @@ void sysfs_instantiate(struct dentry *dentry, struct inode *inode) { BUG_ON(!dentry || dentry->d_inode); - if (inode->i_state & I_NEW) - unlock_new_inode(inode); - d_instantiate(dentry, inode); } -- cgit v1.2.3 From 119dd52be33dfe6285f586ab7354897fdefc7e23 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Mon, 20 Aug 2007 21:36:29 +0900 Subject: sysfs: Remove sysfs_instantiate Now that sysfs_get_inode is dropping the inode lock we no longer have a need from sysfs_instantiate. Signed-off-by: Eric W. Biederman Signed-off-by: Tejun Heo Cc: Cornelia Huck Signed-off-by: Greg Kroah-Hartman --- fs/sysfs/inode.c | 17 ----------------- 1 file changed, 17 deletions(-) (limited to 'fs/sysfs/inode.c') diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c index 200e1bf6f932..0d706a86d2c7 100644 --- a/fs/sysfs/inode.c +++ b/fs/sysfs/inode.c @@ -211,23 +211,6 @@ struct inode * sysfs_get_inode(struct sysfs_dirent *sd) return inode; } -/** - * sysfs_instantiate - instantiate dentry - * @dentry: dentry to be instantiated - * @inode: inode associated with @sd - * - * Unlock @inode if locked and instantiate @dentry with @inode. - * - * LOCKING: - * None. - */ -void sysfs_instantiate(struct dentry *dentry, struct inode *inode) -{ - BUG_ON(!dentry || dentry->d_inode); - - d_instantiate(dentry, inode); -} - int sysfs_hash_and_remove(struct sysfs_dirent *dir_sd, const char *name) { struct sysfs_addrm_cxt acxt; -- cgit v1.2.3 From b1fc3d6144d56360d1373b01c7881826f558b6cd Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Thu, 20 Sep 2007 16:05:11 +0900 Subject: sysfs: make s_elem an anonymous union Make s_elem an anonymous union. Prefixing with s_elem makes things needlessly longer without any advantage. Signed-off-by: Tejun Heo Acked-by: Cornelia Huck Signed-off-by: Greg Kroah-Hartman --- fs/sysfs/inode.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/sysfs/inode.c') diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c index 0d706a86d2c7..b6ac4e6d6e79 100644 --- a/fs/sysfs/inode.c +++ b/fs/sysfs/inode.c @@ -172,7 +172,7 @@ static void sysfs_init_inode(struct sysfs_dirent *sd, struct inode *inode) inode->i_fop = &sysfs_file_operations; break; case SYSFS_KOBJ_BIN_ATTR: - bin_attr = sd->s_elem.bin_attr.bin_attr; + bin_attr = sd->s_bin_attr.bin_attr; inode->i_size = bin_attr->size; inode->i_fop = &bin_fops; break; -- cgit v1.2.3 From dc2f75f0e0cac645c22c85bcf429683b3fa0d2d9 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Thu, 20 Sep 2007 16:05:12 +0900 Subject: sysfs: make sysfs_root a regular directory dirent sysfs_root is different from a regular directory dirent in that it's of type SYSFS_ROOT and doesn't have a name. These differences aren't used by anybody and only adds to complexity. Make sysfs_root a regular directory dirent. Signed-off-by: Tejun Heo Acked-by: Cornelia Huck Signed-off-by: Greg Kroah-Hartman --- fs/sysfs/inode.c | 5 ----- 1 file changed, 5 deletions(-) (limited to 'fs/sysfs/inode.c') diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c index b6ac4e6d6e79..c40fb9fdd04c 100644 --- a/fs/sysfs/inode.c +++ b/fs/sysfs/inode.c @@ -157,11 +157,6 @@ static void sysfs_init_inode(struct sysfs_dirent *sd, struct inode *inode) /* initialize inode according to type */ switch (sysfs_type(sd)) { - case SYSFS_ROOT: - inode->i_op = &sysfs_dir_inode_operations; - inode->i_fop = &sysfs_dir_operations; - inc_nlink(inode); /* directory, account for "." */ - break; case SYSFS_DIR: inode->i_op = &sysfs_dir_inode_operations; inode->i_fop = &sysfs_dir_operations; -- cgit v1.2.3 From bc747f37a0f089b9366f7385ff870e12911f2383 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Thu, 20 Sep 2007 16:05:12 +0900 Subject: sysfs: move sysfs_dirent->s_children into sysfs_dirent->s_dir Children list head is only meaninful for directory nodes. Move it into s_dir. This doesn't save any space currently but it will with further changes. Signed-off-by: Tejun Heo Acked-by: Cornelia Huck Signed-off-by: Greg Kroah-Hartman --- fs/sysfs/inode.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/sysfs/inode.c') diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c index c40fb9fdd04c..2210cf0005fe 100644 --- a/fs/sysfs/inode.c +++ b/fs/sysfs/inode.c @@ -127,7 +127,7 @@ static int sysfs_count_nlink(struct sysfs_dirent *sd) struct sysfs_dirent *child; int nr = 0; - for (child = sd->s_children; child; child = child->s_sibling) + for (child = sd->s_dir.children; child; child = child->s_sibling) if (sysfs_type(child) == SYSFS_DIR) nr++; -- cgit v1.2.3 From 6d66f5cd26e4c482e986130b7572f2735a0f7e8b Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Thu, 20 Sep 2007 17:31:38 +0900 Subject: sysfs: add copyrights Sysfs has gone through considerable amount of reimplementation. Add copyrights. Any objections? :-) Signed-off-by: Tejun Heo Signed-off-by: Greg Kroah-Hartman --- fs/sysfs/inode.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) (limited to 'fs/sysfs/inode.c') diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c index 2210cf0005fe..9236635111f4 100644 --- a/fs/sysfs/inode.c +++ b/fs/sysfs/inode.c @@ -1,7 +1,11 @@ /* - * inode.c - basic inode and dentry operations. + * fs/sysfs/inode.c - basic sysfs inode and dentry operations * - * sysfs is Copyright (c) 2001-3 Patrick Mochel + * Copyright (c) 2001-3 Patrick Mochel + * Copyright (c) 2007 SUSE Linux Products GmbH + * Copyright (c) 2007 Tejun Heo + * + * This file is released under the GPLv2. * * Please see Documentation/filesystems/sysfs.txt for more information. */ -- cgit v1.2.3