| Message ID | 20220214200017.3150590-11-willy@infradead.org (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | Various fixes around invalidate_page() | expand |
Looks good,
Reviewed-by: Christoph Hellwig <hch@lst.de>
On 2022/2/15 4:00, Matthew Wilcox (Oracle) wrote: > These functions are page cache functionality and don't need to be > declared in fs.h. > > Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> LGTM. Thanks. Reviewed-by: Miaohe Lin <linmiaohe@huawei.com> > --- > drivers/block/xen-blkback/xenbus.c | 1 + > drivers/usb/gadget/function/f_mass_storage.c | 1 + > fs/coda/file.c | 1 + > fs/iomap/fiemap.c | 1 + > fs/nfsd/filecache.c | 1 + > fs/nfsd/vfs.c | 1 + > fs/vboxsf/utils.c | 1 + > include/linux/fs.h | 116 ------------------- > include/linux/pagemap.h | 114 ++++++++++++++++++ > 9 files changed, 121 insertions(+), 116 deletions(-) > > diff --git a/drivers/block/xen-blkback/xenbus.c b/drivers/block/xen-blkback/xenbus.c > index 62125fd4af4a..f09040435e2e 100644 > --- a/drivers/block/xen-blkback/xenbus.c > +++ b/drivers/block/xen-blkback/xenbus.c > @@ -10,6 +10,7 @@ > > #include <linux/module.h> > #include <linux/kthread.h> > +#include <linux/pagemap.h> > #include <xen/events.h> > #include <xen/grant_table.h> > #include "common.h" > diff --git a/drivers/usb/gadget/function/f_mass_storage.c b/drivers/usb/gadget/function/f_mass_storage.c > index 46dd11dcb3a8..7371c6e65b10 100644 > --- a/drivers/usb/gadget/function/f_mass_storage.c > +++ b/drivers/usb/gadget/function/f_mass_storage.c > @@ -179,6 +179,7 @@ > #include <linux/kthread.h> > #include <linux/sched/signal.h> > #include <linux/limits.h> > +#include <linux/pagemap.h> > #include <linux/rwsem.h> > #include <linux/slab.h> > #include <linux/spinlock.h> > diff --git a/fs/coda/file.c b/fs/coda/file.c > index 29dd87be2fb8..3f3c81e6b1ab 100644 > --- a/fs/coda/file.c > +++ b/fs/coda/file.c > @@ -14,6 +14,7 @@ > #include <linux/time.h> > #include <linux/file.h> > #include <linux/fs.h> > +#include <linux/pagemap.h> > #include <linux/stat.h> > #include <linux/cred.h> > #include <linux/errno.h> > diff --git a/fs/iomap/fiemap.c b/fs/iomap/fiemap.c > index 66cf267c68ae..610ca6f1ec9b 100644 > --- a/fs/iomap/fiemap.c > +++ b/fs/iomap/fiemap.c > @@ -7,6 +7,7 @@ > #include <linux/fs.h> > #include <linux/iomap.h> > #include <linux/fiemap.h> > +#include <linux/pagemap.h> > > static int iomap_to_fiemap(struct fiemap_extent_info *fi, > const struct iomap *iomap, u32 flags) > diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c > index 8bc807c5fea4..47f804e0ec93 100644 > --- a/fs/nfsd/filecache.c > +++ b/fs/nfsd/filecache.c > @@ -7,6 +7,7 @@ > #include <linux/hash.h> > #include <linux/slab.h> > #include <linux/file.h> > +#include <linux/pagemap.h> > #include <linux/sched.h> > #include <linux/list_lru.h> > #include <linux/fsnotify_backend.h> > diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c > index 91600e71be19..fe0d7abbc1b1 100644 > --- a/fs/nfsd/vfs.c > +++ b/fs/nfsd/vfs.c > @@ -26,6 +26,7 @@ > #include <linux/xattr.h> > #include <linux/jhash.h> > #include <linux/ima.h> > +#include <linux/pagemap.h> > #include <linux/slab.h> > #include <linux/uaccess.h> > #include <linux/exportfs.h> > diff --git a/fs/vboxsf/utils.c b/fs/vboxsf/utils.c > index aec2ebf7d25a..e1db0f3f7e5e 100644 > --- a/fs/vboxsf/utils.c > +++ b/fs/vboxsf/utils.c > @@ -9,6 +9,7 @@ > #include <linux/namei.h> > #include <linux/nls.h> > #include <linux/sizes.h> > +#include <linux/pagemap.h> > #include <linux/vfs.h> > #include "vfsmod.h" > > diff --git a/include/linux/fs.h b/include/linux/fs.h > index 85c584c5c623..0961c979e949 100644 > --- a/include/linux/fs.h > +++ b/include/linux/fs.h > @@ -2746,50 +2746,6 @@ extern void init_special_inode(struct inode *, umode_t, dev_t); > extern void make_bad_inode(struct inode *); > extern bool is_bad_inode(struct inode *); > > -unsigned long invalidate_mapping_pages(struct address_space *mapping, > - pgoff_t start, pgoff_t end); > - > -static inline void invalidate_remote_inode(struct inode *inode) > -{ > - if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || > - S_ISLNK(inode->i_mode)) > - invalidate_mapping_pages(inode->i_mapping, 0, -1); > -} > -extern int invalidate_inode_pages2(struct address_space *mapping); > -extern int invalidate_inode_pages2_range(struct address_space *mapping, > - pgoff_t start, pgoff_t end); > -extern int write_inode_now(struct inode *, int); > -extern int filemap_fdatawrite(struct address_space *); > -extern int filemap_flush(struct address_space *); > -extern int filemap_fdatawait_keep_errors(struct address_space *mapping); > -extern int filemap_fdatawait_range(struct address_space *, loff_t lstart, > - loff_t lend); > -extern int filemap_fdatawait_range_keep_errors(struct address_space *mapping, > - loff_t start_byte, loff_t end_byte); > - > -static inline int filemap_fdatawait(struct address_space *mapping) > -{ > - return filemap_fdatawait_range(mapping, 0, LLONG_MAX); > -} > - > -extern bool filemap_range_has_page(struct address_space *, loff_t lstart, > - loff_t lend); > -extern int filemap_write_and_wait_range(struct address_space *mapping, > - loff_t lstart, loff_t lend); > -extern int __filemap_fdatawrite_range(struct address_space *mapping, > - loff_t start, loff_t end, int sync_mode); > -extern int filemap_fdatawrite_range(struct address_space *mapping, > - loff_t start, loff_t end); > -extern int filemap_check_errors(struct address_space *mapping); > -extern void __filemap_set_wb_err(struct address_space *mapping, int err); > -int filemap_fdatawrite_wbc(struct address_space *mapping, > - struct writeback_control *wbc); > - > -static inline int filemap_write_and_wait(struct address_space *mapping) > -{ > - return filemap_write_and_wait_range(mapping, 0, LLONG_MAX); > -} > - > extern int __must_check file_fdatawait_range(struct file *file, loff_t lstart, > loff_t lend); > extern int __must_check file_check_and_advance_wb_err(struct file *file); > @@ -2801,67 +2757,6 @@ static inline int file_write_and_wait(struct file *file) > return file_write_and_wait_range(file, 0, LLONG_MAX); > } > > -/** > - * filemap_set_wb_err - set a writeback error on an address_space > - * @mapping: mapping in which to set writeback error > - * @err: error to be set in mapping > - * > - * When writeback fails in some way, we must record that error so that > - * userspace can be informed when fsync and the like are called. We endeavor > - * to report errors on any file that was open at the time of the error. Some > - * internal callers also need to know when writeback errors have occurred. > - * > - * When a writeback error occurs, most filesystems will want to call > - * filemap_set_wb_err to record the error in the mapping so that it will be > - * automatically reported whenever fsync is called on the file. > - */ > -static inline void filemap_set_wb_err(struct address_space *mapping, int err) > -{ > - /* Fastpath for common case of no error */ > - if (unlikely(err)) > - __filemap_set_wb_err(mapping, err); > -} > - > -/** > - * filemap_check_wb_err - has an error occurred since the mark was sampled? > - * @mapping: mapping to check for writeback errors > - * @since: previously-sampled errseq_t > - * > - * Grab the errseq_t value from the mapping, and see if it has changed "since" > - * the given value was sampled. > - * > - * If it has then report the latest error set, otherwise return 0. > - */ > -static inline int filemap_check_wb_err(struct address_space *mapping, > - errseq_t since) > -{ > - return errseq_check(&mapping->wb_err, since); > -} > - > -/** > - * filemap_sample_wb_err - sample the current errseq_t to test for later errors > - * @mapping: mapping to be sampled > - * > - * Writeback errors are always reported relative to a particular sample point > - * in the past. This function provides those sample points. > - */ > -static inline errseq_t filemap_sample_wb_err(struct address_space *mapping) > -{ > - return errseq_sample(&mapping->wb_err); > -} > - > -/** > - * file_sample_sb_err - sample the current errseq_t to test for later errors > - * @file: file pointer to be sampled > - * > - * Grab the most current superblock-level errseq_t value for the given > - * struct file. > - */ > -static inline errseq_t file_sample_sb_err(struct file *file) > -{ > - return errseq_sample(&file->f_path.dentry->d_sb->s_wb_err); > -} > - > extern int vfs_fsync_range(struct file *file, loff_t start, loff_t end, > int datasync); > extern int vfs_fsync(struct file *file, int datasync); > @@ -3604,15 +3499,4 @@ extern int vfs_fadvise(struct file *file, loff_t offset, loff_t len, > extern int generic_fadvise(struct file *file, loff_t offset, loff_t len, > int advice); > > -/* > - * Flush file data before changing attributes. Caller must hold any locks > - * required to prevent further writes to this file until we're done setting > - * flags. > - */ > -static inline int inode_drain_writes(struct inode *inode) > -{ > - inode_dio_wait(inode); > - return filemap_write_and_wait(inode->i_mapping); > -} > - > #endif /* _LINUX_FS_H */ > diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h > index cdb3f118603a..f968b36ad771 100644 > --- a/include/linux/pagemap.h > +++ b/include/linux/pagemap.h > @@ -18,6 +18,120 @@ > > struct folio_batch; > > +unsigned long invalidate_mapping_pages(struct address_space *mapping, > + pgoff_t start, pgoff_t end); > + > +static inline void invalidate_remote_inode(struct inode *inode) > +{ > + if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || > + S_ISLNK(inode->i_mode)) > + invalidate_mapping_pages(inode->i_mapping, 0, -1); > +} > +int invalidate_inode_pages2(struct address_space *mapping); > +int invalidate_inode_pages2_range(struct address_space *mapping, > + pgoff_t start, pgoff_t end); > +int write_inode_now(struct inode *, int sync); > +int filemap_fdatawrite(struct address_space *); > +int filemap_flush(struct address_space *); > +int filemap_fdatawait_keep_errors(struct address_space *mapping); > +int filemap_fdatawait_range(struct address_space *, loff_t lstart, loff_t lend); > +int filemap_fdatawait_range_keep_errors(struct address_space *mapping, > + loff_t start_byte, loff_t end_byte); > + > +static inline int filemap_fdatawait(struct address_space *mapping) > +{ > + return filemap_fdatawait_range(mapping, 0, LLONG_MAX); > +} > + > +bool filemap_range_has_page(struct address_space *, loff_t lstart, loff_t lend); > +int filemap_write_and_wait_range(struct address_space *mapping, > + loff_t lstart, loff_t lend); > +int __filemap_fdatawrite_range(struct address_space *mapping, > + loff_t start, loff_t end, int sync_mode); > +int filemap_fdatawrite_range(struct address_space *mapping, > + loff_t start, loff_t end); > +int filemap_check_errors(struct address_space *mapping); > +void __filemap_set_wb_err(struct address_space *mapping, int err); > +int filemap_fdatawrite_wbc(struct address_space *mapping, > + struct writeback_control *wbc); > + > +static inline int filemap_write_and_wait(struct address_space *mapping) > +{ > + return filemap_write_and_wait_range(mapping, 0, LLONG_MAX); > +} > + > +/** > + * filemap_set_wb_err - set a writeback error on an address_space > + * @mapping: mapping in which to set writeback error > + * @err: error to be set in mapping > + * > + * When writeback fails in some way, we must record that error so that > + * userspace can be informed when fsync and the like are called. We endeavor > + * to report errors on any file that was open at the time of the error. Some > + * internal callers also need to know when writeback errors have occurred. > + * > + * When a writeback error occurs, most filesystems will want to call > + * filemap_set_wb_err to record the error in the mapping so that it will be > + * automatically reported whenever fsync is called on the file. > + */ > +static inline void filemap_set_wb_err(struct address_space *mapping, int err) > +{ > + /* Fastpath for common case of no error */ > + if (unlikely(err)) > + __filemap_set_wb_err(mapping, err); > +} > + > +/** > + * filemap_check_wb_err - has an error occurred since the mark was sampled? > + * @mapping: mapping to check for writeback errors > + * @since: previously-sampled errseq_t > + * > + * Grab the errseq_t value from the mapping, and see if it has changed "since" > + * the given value was sampled. > + * > + * If it has then report the latest error set, otherwise return 0. > + */ > +static inline int filemap_check_wb_err(struct address_space *mapping, > + errseq_t since) > +{ > + return errseq_check(&mapping->wb_err, since); > +} > + > +/** > + * filemap_sample_wb_err - sample the current errseq_t to test for later errors > + * @mapping: mapping to be sampled > + * > + * Writeback errors are always reported relative to a particular sample point > + * in the past. This function provides those sample points. > + */ > +static inline errseq_t filemap_sample_wb_err(struct address_space *mapping) > +{ > + return errseq_sample(&mapping->wb_err); > +} > + > +/** > + * file_sample_sb_err - sample the current errseq_t to test for later errors > + * @file: file pointer to be sampled > + * > + * Grab the most current superblock-level errseq_t value for the given > + * struct file. > + */ > +static inline errseq_t file_sample_sb_err(struct file *file) > +{ > + return errseq_sample(&file->f_path.dentry->d_sb->s_wb_err); > +} > + > +/* > + * Flush file data before changing attributes. Caller must hold any locks > + * required to prevent further writes to this file until we're done setting > + * flags. > + */ > +static inline int inode_drain_writes(struct inode *inode) > +{ > + inode_dio_wait(inode); > + return filemap_write_and_wait(inode->i_mapping); > +} > + > static inline bool mapping_empty(struct address_space *mapping) > { > return xa_empty(&mapping->i_pages); >
diff --git a/drivers/block/xen-blkback/xenbus.c b/drivers/block/xen-blkback/xenbus.c index 62125fd4af4a..f09040435e2e 100644 --- a/drivers/block/xen-blkback/xenbus.c +++ b/drivers/block/xen-blkback/xenbus.c @@ -10,6 +10,7 @@ #include <linux/module.h> #include <linux/kthread.h> +#include <linux/pagemap.h> #include <xen/events.h> #include <xen/grant_table.h> #include "common.h" diff --git a/drivers/usb/gadget/function/f_mass_storage.c b/drivers/usb/gadget/function/f_mass_storage.c index 46dd11dcb3a8..7371c6e65b10 100644 --- a/drivers/usb/gadget/function/f_mass_storage.c +++ b/drivers/usb/gadget/function/f_mass_storage.c @@ -179,6 +179,7 @@ #include <linux/kthread.h> #include <linux/sched/signal.h> #include <linux/limits.h> +#include <linux/pagemap.h> #include <linux/rwsem.h> #include <linux/slab.h> #include <linux/spinlock.h> diff --git a/fs/coda/file.c b/fs/coda/file.c index 29dd87be2fb8..3f3c81e6b1ab 100644 --- a/fs/coda/file.c +++ b/fs/coda/file.c @@ -14,6 +14,7 @@ #include <linux/time.h> #include <linux/file.h> #include <linux/fs.h> +#include <linux/pagemap.h> #include <linux/stat.h> #include <linux/cred.h> #include <linux/errno.h> diff --git a/fs/iomap/fiemap.c b/fs/iomap/fiemap.c index 66cf267c68ae..610ca6f1ec9b 100644 --- a/fs/iomap/fiemap.c +++ b/fs/iomap/fiemap.c @@ -7,6 +7,7 @@ #include <linux/fs.h> #include <linux/iomap.h> #include <linux/fiemap.h> +#include <linux/pagemap.h> static int iomap_to_fiemap(struct fiemap_extent_info *fi, const struct iomap *iomap, u32 flags) diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c index 8bc807c5fea4..47f804e0ec93 100644 --- a/fs/nfsd/filecache.c +++ b/fs/nfsd/filecache.c @@ -7,6 +7,7 @@ #include <linux/hash.h> #include <linux/slab.h> #include <linux/file.h> +#include <linux/pagemap.h> #include <linux/sched.h> #include <linux/list_lru.h> #include <linux/fsnotify_backend.h> diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index 91600e71be19..fe0d7abbc1b1 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -26,6 +26,7 @@ #include <linux/xattr.h> #include <linux/jhash.h> #include <linux/ima.h> +#include <linux/pagemap.h> #include <linux/slab.h> #include <linux/uaccess.h> #include <linux/exportfs.h> diff --git a/fs/vboxsf/utils.c b/fs/vboxsf/utils.c index aec2ebf7d25a..e1db0f3f7e5e 100644 --- a/fs/vboxsf/utils.c +++ b/fs/vboxsf/utils.c @@ -9,6 +9,7 @@ #include <linux/namei.h> #include <linux/nls.h> #include <linux/sizes.h> +#include <linux/pagemap.h> #include <linux/vfs.h> #include "vfsmod.h" diff --git a/include/linux/fs.h b/include/linux/fs.h index 85c584c5c623..0961c979e949 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2746,50 +2746,6 @@ extern void init_special_inode(struct inode *, umode_t, dev_t); extern void make_bad_inode(struct inode *); extern bool is_bad_inode(struct inode *); -unsigned long invalidate_mapping_pages(struct address_space *mapping, - pgoff_t start, pgoff_t end); - -static inline void invalidate_remote_inode(struct inode *inode) -{ - if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || - S_ISLNK(inode->i_mode)) - invalidate_mapping_pages(inode->i_mapping, 0, -1); -} -extern int invalidate_inode_pages2(struct address_space *mapping); -extern int invalidate_inode_pages2_range(struct address_space *mapping, - pgoff_t start, pgoff_t end); -extern int write_inode_now(struct inode *, int); -extern int filemap_fdatawrite(struct address_space *); -extern int filemap_flush(struct address_space *); -extern int filemap_fdatawait_keep_errors(struct address_space *mapping); -extern int filemap_fdatawait_range(struct address_space *, loff_t lstart, - loff_t lend); -extern int filemap_fdatawait_range_keep_errors(struct address_space *mapping, - loff_t start_byte, loff_t end_byte); - -static inline int filemap_fdatawait(struct address_space *mapping) -{ - return filemap_fdatawait_range(mapping, 0, LLONG_MAX); -} - -extern bool filemap_range_has_page(struct address_space *, loff_t lstart, - loff_t lend); -extern int filemap_write_and_wait_range(struct address_space *mapping, - loff_t lstart, loff_t lend); -extern int __filemap_fdatawrite_range(struct address_space *mapping, - loff_t start, loff_t end, int sync_mode); -extern int filemap_fdatawrite_range(struct address_space *mapping, - loff_t start, loff_t end); -extern int filemap_check_errors(struct address_space *mapping); -extern void __filemap_set_wb_err(struct address_space *mapping, int err); -int filemap_fdatawrite_wbc(struct address_space *mapping, - struct writeback_control *wbc); - -static inline int filemap_write_and_wait(struct address_space *mapping) -{ - return filemap_write_and_wait_range(mapping, 0, LLONG_MAX); -} - extern int __must_check file_fdatawait_range(struct file *file, loff_t lstart, loff_t lend); extern int __must_check file_check_and_advance_wb_err(struct file *file); @@ -2801,67 +2757,6 @@ static inline int file_write_and_wait(struct file *file) return file_write_and_wait_range(file, 0, LLONG_MAX); } -/** - * filemap_set_wb_err - set a writeback error on an address_space - * @mapping: mapping in which to set writeback error - * @err: error to be set in mapping - * - * When writeback fails in some way, we must record that error so that - * userspace can be informed when fsync and the like are called. We endeavor - * to report errors on any file that was open at the time of the error. Some - * internal callers also need to know when writeback errors have occurred. - * - * When a writeback error occurs, most filesystems will want to call - * filemap_set_wb_err to record the error in the mapping so that it will be - * automatically reported whenever fsync is called on the file. - */ -static inline void filemap_set_wb_err(struct address_space *mapping, int err) -{ - /* Fastpath for common case of no error */ - if (unlikely(err)) - __filemap_set_wb_err(mapping, err); -} - -/** - * filemap_check_wb_err - has an error occurred since the mark was sampled? - * @mapping: mapping to check for writeback errors - * @since: previously-sampled errseq_t - * - * Grab the errseq_t value from the mapping, and see if it has changed "since" - * the given value was sampled. - * - * If it has then report the latest error set, otherwise return 0. - */ -static inline int filemap_check_wb_err(struct address_space *mapping, - errseq_t since) -{ - return errseq_check(&mapping->wb_err, since); -} - -/** - * filemap_sample_wb_err - sample the current errseq_t to test for later errors - * @mapping: mapping to be sampled - * - * Writeback errors are always reported relative to a particular sample point - * in the past. This function provides those sample points. - */ -static inline errseq_t filemap_sample_wb_err(struct address_space *mapping) -{ - return errseq_sample(&mapping->wb_err); -} - -/** - * file_sample_sb_err - sample the current errseq_t to test for later errors - * @file: file pointer to be sampled - * - * Grab the most current superblock-level errseq_t value for the given - * struct file. - */ -static inline errseq_t file_sample_sb_err(struct file *file) -{ - return errseq_sample(&file->f_path.dentry->d_sb->s_wb_err); -} - extern int vfs_fsync_range(struct file *file, loff_t start, loff_t end, int datasync); extern int vfs_fsync(struct file *file, int datasync); @@ -3604,15 +3499,4 @@ extern int vfs_fadvise(struct file *file, loff_t offset, loff_t len, extern int generic_fadvise(struct file *file, loff_t offset, loff_t len, int advice); -/* - * Flush file data before changing attributes. Caller must hold any locks - * required to prevent further writes to this file until we're done setting - * flags. - */ -static inline int inode_drain_writes(struct inode *inode) -{ - inode_dio_wait(inode); - return filemap_write_and_wait(inode->i_mapping); -} - #endif /* _LINUX_FS_H */ diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index cdb3f118603a..f968b36ad771 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -18,6 +18,120 @@ struct folio_batch; +unsigned long invalidate_mapping_pages(struct address_space *mapping, + pgoff_t start, pgoff_t end); + +static inline void invalidate_remote_inode(struct inode *inode) +{ + if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || + S_ISLNK(inode->i_mode)) + invalidate_mapping_pages(inode->i_mapping, 0, -1); +} +int invalidate_inode_pages2(struct address_space *mapping); +int invalidate_inode_pages2_range(struct address_space *mapping, + pgoff_t start, pgoff_t end); +int write_inode_now(struct inode *, int sync); +int filemap_fdatawrite(struct address_space *); +int filemap_flush(struct address_space *); +int filemap_fdatawait_keep_errors(struct address_space *mapping); +int filemap_fdatawait_range(struct address_space *, loff_t lstart, loff_t lend); +int filemap_fdatawait_range_keep_errors(struct address_space *mapping, + loff_t start_byte, loff_t end_byte); + +static inline int filemap_fdatawait(struct address_space *mapping) +{ + return filemap_fdatawait_range(mapping, 0, LLONG_MAX); +} + +bool filemap_range_has_page(struct address_space *, loff_t lstart, loff_t lend); +int filemap_write_and_wait_range(struct address_space *mapping, + loff_t lstart, loff_t lend); +int __filemap_fdatawrite_range(struct address_space *mapping, + loff_t start, loff_t end, int sync_mode); +int filemap_fdatawrite_range(struct address_space *mapping, + loff_t start, loff_t end); +int filemap_check_errors(struct address_space *mapping); +void __filemap_set_wb_err(struct address_space *mapping, int err); +int filemap_fdatawrite_wbc(struct address_space *mapping, + struct writeback_control *wbc); + +static inline int filemap_write_and_wait(struct address_space *mapping) +{ + return filemap_write_and_wait_range(mapping, 0, LLONG_MAX); +} + +/** + * filemap_set_wb_err - set a writeback error on an address_space + * @mapping: mapping in which to set writeback error + * @err: error to be set in mapping + * + * When writeback fails in some way, we must record that error so that + * userspace can be informed when fsync and the like are called. We endeavor + * to report errors on any file that was open at the time of the error. Some + * internal callers also need to know when writeback errors have occurred. + * + * When a writeback error occurs, most filesystems will want to call + * filemap_set_wb_err to record the error in the mapping so that it will be + * automatically reported whenever fsync is called on the file. + */ +static inline void filemap_set_wb_err(struct address_space *mapping, int err) +{ + /* Fastpath for common case of no error */ + if (unlikely(err)) + __filemap_set_wb_err(mapping, err); +} + +/** + * filemap_check_wb_err - has an error occurred since the mark was sampled? + * @mapping: mapping to check for writeback errors + * @since: previously-sampled errseq_t + * + * Grab the errseq_t value from the mapping, and see if it has changed "since" + * the given value was sampled. + * + * If it has then report the latest error set, otherwise return 0. + */ +static inline int filemap_check_wb_err(struct address_space *mapping, + errseq_t since) +{ + return errseq_check(&mapping->wb_err, since); +} + +/** + * filemap_sample_wb_err - sample the current errseq_t to test for later errors + * @mapping: mapping to be sampled + * + * Writeback errors are always reported relative to a particular sample point + * in the past. This function provides those sample points. + */ +static inline errseq_t filemap_sample_wb_err(struct address_space *mapping) +{ + return errseq_sample(&mapping->wb_err); +} + +/** + * file_sample_sb_err - sample the current errseq_t to test for later errors + * @file: file pointer to be sampled + * + * Grab the most current superblock-level errseq_t value for the given + * struct file. + */ +static inline errseq_t file_sample_sb_err(struct file *file) +{ + return errseq_sample(&file->f_path.dentry->d_sb->s_wb_err); +} + +/* + * Flush file data before changing attributes. Caller must hold any locks + * required to prevent further writes to this file until we're done setting + * flags. + */ +static inline int inode_drain_writes(struct inode *inode) +{ + inode_dio_wait(inode); + return filemap_write_and_wait(inode->i_mapping); +} + static inline bool mapping_empty(struct address_space *mapping) { return xa_empty(&mapping->i_pages);
These functions are page cache functionality and don't need to be declared in fs.h. Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> --- drivers/block/xen-blkback/xenbus.c | 1 + drivers/usb/gadget/function/f_mass_storage.c | 1 + fs/coda/file.c | 1 + fs/iomap/fiemap.c | 1 + fs/nfsd/filecache.c | 1 + fs/nfsd/vfs.c | 1 + fs/vboxsf/utils.c | 1 + include/linux/fs.h | 116 ------------------- include/linux/pagemap.h | 114 ++++++++++++++++++ 9 files changed, 121 insertions(+), 116 deletions(-)